01 07 handover

HUAWEI BSC6000 Base Station Subsystem

V900R008

Handover

Issue 02

Date 2008-06-30

Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd

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Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd

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mailto:[email protected]

Contents

1 Handover......................................................................................................................................1-11.1 Overview.........................................................................................................................................................1-21.2 Availability......................................................................................................................................................1-41.3 Technical Description.....................................................................................................................................1-5

1.3.1 Handover Preprocessing.........................................................................................................................1-61.3.2 Handover Decision Algorithm.............................................................................................................1-11

1.4 Implementation..............................................................................................................................................1-271.4.1 Configuring the Handover....................................................................................................................1-271.4.2 Configuring Power Boost Before Handover........................................................................................1-37

1.5 Maintenance Information..............................................................................................................................1-381.6 References.....................................................................................................................................................1-65

HUAWEI BSC6000 Base Station SubsystemHandover Contents

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Figures

Figure 1-1 Handover decision..............................................................................................................................1-6Figure 1-2 Load handover..................................................................................................................................1-20Figure 1-3 Load handover..................................................................................................................................1-21Figure 1-4 Edge handover..................................................................................................................................1-22Figure 1-5 Fast-moving micro cell handover.....................................................................................................1-23Figure 1-6 Cell layer...........................................................................................................................................1-24Figure 1-7 Set Adjacent Relation Property dialog box......................................................................................1-28Figure 1-8 Set Cell Attributes dialog box..........................................................................................................1-29Figure 1-9 Set Handover Parameter dialog box.................................................................................................1-30Figure 1-10 Set Handover Parameter dialog box...............................................................................................1-31Figure 1-11 Filter/penalty data configuration.....................................................................................................1-31Figure 1-12 Cell handover data configuration....................................................................................................1-32Figure 1-13 Emergency handover parameters configuration.............................................................................1-33Figure 1-14 Quick handover parameters configuration......................................................................................1-36Figure 1-15 Set Cell Attributes dialog box........................................................................................................1-37Figure 1-16 Set Other Parameter dialog box......................................................................................................1-38

HUAWEI BSC6000 Base Station SubsystemHandover Figures


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Tables

Table 1-1 NEs involved in handover....................................................................................................................1-4Table 1-2 GBSS products and software versions.................................................................................................1-4Table 1-3 Parameters related to the number of measurement reports..................................................................1-7Table 1-4 Parameters related to the number of measurement reports..................................................................1-8Table 1-5 Counters related to handover.............................................................................................................1-39

HUAWEI BSC6000 Base Station SubsystemHandover Tables


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1 Handover

About This Chapter

1.1 OverviewThis describes handover. Controlled by the network, handover is a basic function of the mobilecommunications system. Handover ensures the continuity of mobile services.

1.2 AvailabilityThis describes the availability of handover. The realization of handover depends on thecooperation of relevant NEs and software.

1.3 Technical DescriptionThis describes Huawei handover algorithm from a technical perspective. As a whole, Huaweihandover algorithm is composed of handover preprocessing and handover decision.

1.4 ImplementationThis describes how to configure the handover and the power boost before handover.

1.5 Maintenance InformationThis lists the performance counters related to handover.

1.6 ReferencesThe references indicate the documents about handover from the related standard organizations.

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1-1

1.1 OverviewThis describes handover. Controlled by the network, handover is a basic function of the mobilecommunications system. Handover ensures the continuity of mobile services.

DefinitionHandover is a process in which a conversation can be sustained when an MS moves from onecell to another in order to meet the requirement of network management.

PurposesAs a method of radio link control, handover enables an MS to keep a conversation sustainablewhen the MS travels across different cells. In addition, handover can optimize the overallperformance of the system through the adjustment of traffic volume by means of parameters.

TermsTerms Definition

Ping-ponghandover

Ping-pong handover occurs when an MS is handed over back and forth betweentwo cells due to the changes in signal quality or the improper settings of theparameters.

Co-siteneighborcells

Neighbor cells under the same BTS.

Raileighfading

In radio propagation, signals inevitably suffer from short-period amplitudechanges. Raileigh fading relates to frequency. In other words, signal fading isfrequency-specific.

Chainneighborcell

Chain neighbor cell is a parameter of the neighbor cell relation property. Duringthe quick handover, the MS can be handed over to only the neighbor cells of theserving cell. In addition, the neighbor cells and the serving cell must beconfigured in chain mode. Generally, the two neighbor cells in the direction ofthe fast movement of the MS are configured as chain neighbor cells. Theconfigurations depend on the actual conditions.

ATCBhandover

ATCB handover is a special method of determining the boundary between anoverlaid subcell and an underlaid subcell for the enhanced dual-band network.The coverage area of the overlaid subcell is determined through theATCB_THRD, the ATCB_HYST, and the difference between the signalstrength of the serving cell and that of the neighbor cell.

1 HandoverHUAWEI BSC6000 Base Station Subsystem

Handover

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Terms Definition

Frequencyoffset

When the transmit source of the radio wave is far from the receive party, thewavelength is long and the frequency is low. When the transmit source is closeto the receive party, the wavelength is short and the frequency is high. The BTScarrying the serving cell can calculate the frequency offset (indicated by Δf)through the signals transmitted by the moving MS. If the absolute value of Δfis great, you can infer that the MS is moving fast. If Δf is a positive number, youcan infer that the MS is moving toward the BTS. If Δf is a negative number, youcan infer that the MS is moving away from the BTS.

Differentfrequencies set

In FH mode, the different frequencies set refers to a certain FH group. In non-FH mode, the different frequencies set refers to a certain frequency.

Enhancedmeasurement report

The enhanced measurement report is a new downlink measurement report,reported by the MS. Compared with the normal measurement report, some newmeasurements are added, such as BER, FER, and so on. The enhancedmeasurement report provides the measurement information of up to 15 neighborGSM/WCDMA cells, whereas the normal measurement report provides themeasurement information of 6 neighbor GSM cells at most.

FULLSET

The FULL SET refers to the signal RX level and quality of TCH channels whenthe BTS performs full power emission.

SUB SET The SUB SET refers to the signal RX level and quality of TCH channels in DTXmode.

Ec/N0 Ec/No means Signal Noise Ratio in WCDMA. It maps with C/I in GSM.

Acronyms and AbbreviationsAcronyms and Abbreviations Full Spelling

MS Mobile Station

BSC Base Station Controller

MR Measure report

BQ Bad Quality

TA Timing Advance

BSIC Base Station Identity Code

BER Bit Error Ratio

BCCH Broadcast Control CHannel

AMR Adaptive Multi Rate

ATCB Adapter Distance To Cell Border

RQI Radio Quality Indication



1-3

Acronyms and Abbreviations Full Spelling

RSCP Received Signal Code Power

CPICH Common Pilot Channel

PBGT Power Budget Handover

1.2 AvailabilityThis describes the availability of handover. The realization of handover depends on thecooperation of relevant NEs and software.

NEs Involved

Table 1-1 lists the network elements involved in handover.

Table 1-1 NEs involved in handover

MS BTS BSC MSC MGW SGSN GGSN HLR

√ √ √ √ – – – –

NOTE

l –: NEs not involved

l √: involved

Software Releases

Table 1-2 lists the versions of GBSS products that support handover.

Table 1-2 GBSS products and software versions

Product Version

BSC BSC6000 V900R008C01 and later releases

BTS BTS3012 DTRU BTS3000V100R001C01 and later releases

QTRU BTS3000V100R008C01 and later releases

BTS3012AE DTRU BTS3000V100R001C04 and later releases

QTRU BTS3000V100R008C01 and later releases

BTS3006C BTS3000V100R002C01 and later releases

BTS3002E BTS3000V100R002C01 and later releases

DBS3900 GSM BTS3000V100R008C01 and later releases


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Product Version

BTS3900 GSM BTS3000V100R008C02 and later releases

BTS3900A GSM BTS3000V100R008C02 and later releases

Miscellaneous

None

1.3 Technical DescriptionThis describes Huawei handover algorithm from a technical perspective. As a whole, Huaweihandover algorithm is composed of handover preprocessing and handover decision.

Handover Preprocessing

Handover preprocessing consists of the following contents:

l Handover Preparation

l Handover Penalty

l Neighbor Cell Sorting

l Network Characteristic Adjustment

l Forced handover processing

l Power boost before HO enabled

Handover Decision

Handover decision is categorized into the following types:

l Quick handover (consisting of quick PBGT handover and frequency offset handover).Good services can be provided when the speech quality deteriorates during the fastmovement of an MS. Quick handover is mainly applicable to the railway scenario.

l Emergency handover. Emergency handover can keep a call sustainable when the radioenvironment severely deteriorates. Theoretically, the emergency handover algorithmproduces greater error in evaluating the target cell than that produced by other handoveralgorithms. In normal cell, frequent emergency handovers should be avoided.

l Enhanced dual-band network handover. In an enhanced dual-band network, the resourcesin the overlaid 1800M subcell and underlaid 900M subcell can be shared during theassignment and handover procedures. That is, the calls in the high-traffic 900M subcell canbe moved to the low-traffic 1800M subcell to achieve traffic balance.

l Load handover. Load handover can enable the load of system traffic to be shared so thatthe deterioration of local counters is minimized.

l General handover. General handover can ensure good services when an MS is moving.

Figure 1-1 shows the priority and handover algorithm of each type of handover decision:



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Figure 1-1 Handover decision

TA handover

Emergency handover

Interference handover

Quick level drop handover

Bad quality handover

Quick handover

Enhanced dual-band network handover

Load handover

General handover

Edge handover

Fast-moving micro cell handover

Inter-layer (better cell) handover

PBGT handover

AMR handover

Better 3G cell handover

TIGHT BCCH handover algorithm

1.3.1 Handover PreprocessingThis describes handover preprocessing. Based on the neighbor cell information and configuredparameters in the measurement report, the system performs handover preprocessing and adjuststhe priority of a neighbor cell.

Measurement Report

The BSC decodes neighbor cell information from the measurement report.

The processing can be performed either on the BSC side or on the BTS side.

l If MR.Preprocessing is set to No, then the processing is performed on the BSC side.


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NOTE

MR.Preprocessing is set to No by default.

l If MR.Preprocessing is set to Yes, then the processing is performed on the BTS side. Bysetting the parameters Transfer Original MR, Transfer BS/MS Power Class and SentFreq.of preprocessed MR, you can specify the contents of the MRs to be provided andthe period during which the MRs are provided. In this way, the signaling throughput on theAbis interface and the usage of the BSC can be decreased.

The MR can be classified into enhanced MR and normal MR, the parameter Report Typedetermines which type is used.

In the MR, the TCH measurement of the serving cell is classified into FULL SET and SUB SET.The parameter DtxMeasUsed determines whether the DTX is used during measurement whenthe MS and BTS report MRs.

According to the BCCH frequencies and BSIC reported by an MS, the corresponding neighborcell index is detected. Then the uplink part and downlink part of the measurement report is read.

l If measurement reports are issued continuously, they are directly interposed in themeasurement report queue.

l If measurement reports are issued discontinuously and the number of lost measurementreports is smaller than Allowed M.R Number Lost, the system performs operations asfollows:

– For the serving cell, the MRs are linear interpolated.

– For the neighbor cell, the lowest values are applied to the lost measurement valuesaccording to the protocols; that is, level 0 (-110 dBm) is applied in interpolation.

NOTE

The same method is applied in the condition that no MR due to low RX level in the neighborcell.

l If measurement reports are issued discontinuously and the number of lost measurementreports is greater than Allowed M.R Number Lost, the previous measurement reports arediscarded. When new measurement reports arrive, calculation is performed again.

Filtering treatment is performed on measurement reports, that is, a number of consecutivemeasurement reports are obtained from the queue. Averaging treatment is performed on uplink/downlink RX level, uplink/downlink RX quality, TA, RQI, BTS power, 2G neighbor cell level,and the CPICH, RSCP, and Ec/No of 3G neighbor cell. The averaging treatment minimizes theeffect of abrupt changes in individual measurement report values on the result of handoverdecision.

The number of consecutive measurement reports needed in filtering is different according to themeasurement object and channel type, as listed in Table 1-3.

Table 1-3 Parameters related to the number of measurement reports

MeasurementObject

ChannelType Parameter

Receive level of theserving cell

SDCCH Filter Length for SDCCH Level

TCH Filter Length for TCH Level



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MeasurementObject

ChannelType Parameter

Quality of theserving cell

SDCCH Filter Length for SDCCH Qual

TCH Filter Length for TCH Qual

TA of the servingcell

- Filter Length for TA

Receive level of theneighbor cell

BCCH Filter Length for Ncell RX_LEV

Power of the BTS inthe serving cell

TCH Filter Length for TCH Level

RQI TCH Filter Length for TCH Qual

If consecutive measurement reports are insufficient, you can infer that filtering fails. Thenhandover decision is not performed.

Quick Handover PreparationThe preparation of quick handover involves the following main aspects:

l Frequency offset is decoded from the measurement report.Frequency offset of the MS is obtained from the uplink measurement report from the BTSby the BSC.

l α filtering is performed to the measurement report.

Handover PenaltyThe handover penalty is performed in the following conditions: quick handover succeeds, TAemergency handover succeeds, BQ emergency handover succeeds, quick micro cell handoversucceeds, OL subcell to UL subcell handover within an enhanced concentric cell succeeds, andhandover failure.

l After the quick handover, TA emergency handover, or BQ emergency handover issuccessful, the actual RX level of the old cell is subtracted with related value during thepenalty. Table 1-4 lists the related parameters.

Table 1-4 Parameters related to the number of measurement reports

Handover Parameter

Quickhandover

Quick Handover Punish Time(s)Quick Handover Punish Value

TAHandover

Penalty Level after TA HOPenalty Time after TA HO(s)


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Handover Parameter

BQhandover

Penalty Level after BQ HOPenalty Time after BQ HO(s)

l After the quick micro cell handover is successful, penalty is performed on all the neighbor

cells of the micro cell. Related parameters are Penalty on Fast Moving HO and PenaltyTime on Fast Moving HO(s).

l After the OL subcell to UL subcell handover within an enhanced concentric cell issuccessful, the call handover from OL subcell to UL subcell is not allowed within PenaltyTime of UtoO HO(s).

l After the OL subcell to UL subcell handover in the enhanced dual-band network issuccessful, the call handover from OL subcell to UL subcell is not allowed within InterUL And OL Subcells HO Penalty Time(s).

l After the handover fails, different penalties are performed to the target cell according todifferent causes:– If the handover to a neighbor 2G or 3G cell fails, the actual RX level of the target cell

is decreased by Penalty Level after HO Fail for neighbor cell queuing during thepenalty.

NOTE

According to the cause of handover failure,the penalty time can be classified into threetypes:UmPenaltyTimer,RscPenaltyTimer,andCfgPenaltyTimer.

– If the OL subcell to UL subcell handover within an enhanced concentric cell fails, thecall handover from OL subcell to UL subcell is not allowed within Penalty Time afterOtoU HO Fail(s).

– If the UL subcell to OL subcell handover within an enhanced concentric cell fails, thecall handover from UL subcell to OL subcell is not allowed within Penalty Time afterUtoO HO Fail(s).

Neighbor Cell Basic Queuing

The purpose of neighbor cell basic queuing is to produce the candidate cell list with the followinginformation taken into account after handover penalty: RX level of the serving cell and neighborcells contained in the MRs, hysteresis, usage of TCHs in the neighbor cells, and so on.

l In non-direct retry situation, if an MS in a BSC external cell occupies an SDCCH and Inter-BSC SDCCH HO ALLowed is set to No, then the cell should be removed from thecandidate cell list; that is, the handover to the BSC external cell is prohibited.

l If a neighbor 2G cell is in the same BSC with the serving cell and the TCH usage of theneighbor cell is 100%, then the neighbor cell is removed from the candidate cell list; thatis, the handover to this neighbor cell is prohibited.

l If the downlink RX level of a neighbor 2G cell is lower than the sum of Min DL Poweron HO Candidate Cell and NCell Interf Type, then the neighbor cell should be removedfrom the candidate cell list; that is, the handover to this neighbor cell is prohibited.

l If the uplink RX level of a neighbor cell is lower than the sum of Min UP Power on HOCandidate Cell and NCell Interf Type, then the neighbor cell should be removed fromthe candidate cell list; that is, the handover to this neighbor cell is prohibited.



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l If a 3G neighbor cell is an FDD cell, the cell is processed according to the FDD REPQUANT:– If FDD REP QUANT is set to Ec/N0, then if the Ec/N0 of the cell is less than Min Ec/

No Threshold, the neighbor cell should be removed from the candidate cell list; thatis, the handover to this neighbor cell is prohibited.

– If FDD REP QUANT is set to RSCP, then if the RSCP of the cell is less than MinRSCP Threshold, the neighbor cell should be removed from the candidate cell list; thatis, the handover to this neighbor cell is prohibited.

l If a 3G neighbor cell is a TDD cell, and if the RSCP of the cell is less than Min RSCPThreshold, then the neighbor cell should be removed from the candidate cell list; that is,the handover to this neighbor cell is prohibited.

l Calculate the difference between the downlink RX level of the neighbor cells and thedownlink RX level of the serving cell. Based on the difference, sort the neighbor cells in adescending order.

Network Characteristic AdjustmentNetwork characteristic adjustment is a process in which the position of each cell is determinedin the queue of candidate cells based on the related network information. Network characteristicadjustment provides the final list of candidate cells for handover decision.

After the network characteristic adjustment, the candidate cells (consisting of neighbor cells andserving cell) are sorted in descending order by priority. Then the handover decision procedurestarts.

Forced HandoverIf the forced handover is triggered, the subsequent handover decision is not performed.

Purpose of the forced handover:

l If no TCH is available in the serving cell during the MS access process, the direct retryprocedure is performed when Direct Retry is set to Yes.

l When BTS maintenance is performed, the MSs under control of the related BTS should behanded over to the cells controlled by a functional BTS to ensure that no call drops occurduring BTS maintenance.

The forced handover is categorized into the following four types:

l Outgoing cell handover (directed retry)

l Outgoing BTS handover

l Outgoing BSC handover

l Specified cell list handover

Power Boost Before HandoverWhen the MS is in a corner, the level may decrease swiftly. At this time, the handover may betriggered. Then, the power control algorithm may fail to adjust the MS and BTS power, thuscausing the MS fails to receive the handover command and call drops.

By quickly adjusting the BTS transmit power to the maximum level before sending the handovercommand to the MS and shielding the BTS power control function during the handover, that is,


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keep the maximum BTS transmit power during the handover, a high handover success rate isensured.

Power boost before handover can be controlled through Power boost before HO enabled ornot.

1.3.2 Handover Decision AlgorithmThis describes the handover decision algorithm. After measurement reports are preprocessed,the handover decision procedure starts. According to the emergency condition of an MS in thenetwork, the handover decision algorithm performs decision in the following order: quickhandover, emergency handover, enhanced dual-band handover, load handover, and then generalhandover.

The handover decision consists of the following two steps:

l Determines whether the serving cell meets the triggering conditions.

l Selects the candidate cells.

The candidate cells is selected based on Inter-RAT HO Preference:

l When Inter-RAT HO Preference is set to Pre_2G_Cell:If there is no eligible neighbor 2G cell but with eligible neighbor 3G cells, then the 3G cellis selected.

l When Inter-RAT HO Preference is set to Pre_3G_Cell:The 3G cell is preferred.

l When Inter-RAT HO Preference is set to Pre_2G_CellThres:If the RX level of 2G candidate cell is smaller than or equal to HO Preference Thresholdfor 2G Cell, then the 3G cell is preferred.

If the emergency handover conditions are met and the number of candidate cells is not zero, thenthe emergency handover timer Min Interval for Emerg.HOs is started. Another emergencyhandover can be decided only when Min Interval for Emerg.HOs expires.

Quick HandoverThis describes quick handover. The handover aims to increase the handover success rate of anMS moving at a high speed and to ensure the call continuity and low call drop rate. Quickhandover applies to the urban backbone roads, selected routes, and high-speed railroads.

Quick Handover TypesQuick handover consists of frequency offset handover and quick PBGT handover.

l Frequency offset handoverAccording to the frequency offset information reported by an MS moving at a high speed,whether the MS is far from the serving cell is determined. Frequency offset handoverdecision is performed according to the uplink/downlink level of the serving cell and thepath loss of the neighbor cell.

l Quick PBGT handoverQuick PBGT handover decision is performed according to the path loss of the neighborcell.



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For quick handover, the handover response speed is enhanced through the following ways:

l Accurately calculating the moving speed of the MS

l Derestricting the interval between handover precisions

l Reducing the number of measurement reports for the handover decision

l Introducing the α filtering

Triggering Condition

Whether the conditions of frequency offset handover are met is determined during handoverdecision. When the BTS cannot report the frequency offset information or the reported frequencyoffset information is invalid, fast PBGT handover is triggered if the other conditions of frequencyoffset handover are met.

If the Quick Handover Enable is set to Yes, the triggering conditions of quick handover are asfollows:

l The MS is far from the serving cell (the frequency offset in the measurement result messageis a negative value) and the moving speed of the MS is higher than Quick Move SpeedThres.

l The uplink level of the serving cell after filtering is lower than Quick Handover UpTrigger Level.

l The downlink level of the serving cell after compensation is lower than Quick HandoverDown Trigger Level.

l The path loss of the configured chain neighbor cell is smaller than a certain threshold ofthe path loss of the serving cell. In other words, PBGT(n) is equal to or greater than 0.

The triggering decisions of quick handover are as follows:

l If the last three conditions are met, the decision is performed as follows:– If the first condition is met, a frequency offset handover is performed.

– If the first condition is not met, a quick PBGT handover is performed.

l If not all the last three conditions are met, quick handover is not triggered.

Target Cell Selection

The target cell must be a chain neighbor cell of the serving cell. The target cell can be obtainedthrough the setting of Chain Neighbor Cell.

Limitations

The limitations on quick handover are as follows:

l The target cell cannot serve as the serving cell.

l The candidate cells for quick handover must be chain neighbor cells of the serving cell.Each cell can be configured with a maximum of three chain neighbor cells.

l After quick handover is successful, penalty is performed on the originating cell during thepenalty time to prevent an immediate switchback to the cell. The penalty time and penaltyvalue depend on Quick Handover Punish Time and Quick Handover Punish Valuerespectively.


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TA Handover

This describes TA handover. TA handover is a kind of emergency handover. TA handoverperforms handover decision based on the TA value reported by an MS.

The TA value of an ordinary cell ranges from 0 to 63. The TA value of the underlaid subcell ina double-timeslot cell ranges from 0 to 229. The step of each bit is 553.5 m. If the TA value isset to 63, you can infer that the distance is 35 km.


TA handover is triggered when the following conditions are met:

l TA HO Allowed is set to Yes.

l Filtered TA value reported by the MS through measurement reports is greater than or equalto TA Threshold.

The TA handover can be triggered only when all the previous conditions are met.

NOTE

From the perspective of the triggering condition for TA handover, TA can be regarded as a criterion forlimiting the size of a cell.


A target cell should be the cell with the highest priority among the queue of sorted candidatecells after preprocessing. In addition, the target cell should meet the following limitations:

l The target cell cannot serve as the serving cell.

l If the TA Threshold of a co-site neighbor cell lower than or equal to the TA Thresholdof the serving cell, a handover to the cell is forbidden.

l After the TA handover succeeds, penalty is performed on the source cell. During PenaltyTime after TA HO(s), the Penalty Level after TA HO is subtracted from the level of thesource cell to avoid an immediate handover back to the source cell.

If the triggering conditions of TA handover are met, and there is no 2G candidate cell, thefollowing operation is performed:

l If a neighbor 3G cell is available, the 2G/3G inter-RAT handover is performed whenOutgoing-RAT HO Allowed is set to Yes and the MS supports the 2G/3G inter-RAThandover.

l If no neighbor 3G cell is available, or Outgoing-RAT HO Allowed is set to No, or the MSdoes not support the 2G/3G inter-RAT handover, then the decision on another emergencyhandover type is performed.

BQ Handover

This describes BQ handover. BQ handover is a kind of emergency handover. BQ handoverperforms decision based on the uplink/downlink RX quality on the Um interface.

The RX quality is measured in bit error ratio (BER). The BSC measures the quality of a radiolink based on the quality class in the measurement report. The probable reason for an increasein BER is that the signal power is too low or the channel interference becomes great.



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If BQ HO Allowed is set to Yes, the triggering conditions of BQ handover are as follows:

l The uplink RX quality is greater than or equal to the uplink RX quality threshold of theserving cell.

l The downlink RX quality is greater than or equal to the downlink RX quality threshold ofthe serving cell.

The BQ handover is triggered if either of the previous conditions is met.

The configuration parameters for uplink and downlink RX quality threshold are as follows:

l For non-AMR calls, the configuration parameters for uplink RX quality threshold is ULQual. Threshold, the configuration parameters for downlink RX quality threshold is DLQual. Threshold.

l For AMR calls, the configuration parameters for uplink RX quality threshold isULQuaLimitAMRFR, the configuration parameters for downlink RX quality thresholdis DLQuaLimitAMRFR.

l For AMR HR calls, the configuration parameters for uplink RX quality threshold isULQuaLimitAMRHR, the configuration parameters for downlink RX quality thresholdis DLQuaLimitAMRHR.


A target cell should be the cell with the highest priority in the list of sorted candidate cells afterthe preprocessing procedure. In addition, the target cell should meet the following limitations:

l If the target cell is a neighbor cell, the RX level of the target cell must meet the followingformula:

Filtered downlink RX level of the neighbor cell > Filtered downlink RX level of the servingcell + Min Access Level Offset of the serving cell configured for the neighbor cell - ChainNeighbor Cell

NOTE

If there is only one cell in the candidate cell queue and the cell is a neighbor cell, then no suchrequirement is needed.

l If there is no neighbor cell, Intracell HO Allowed is set to Yes, and the serving cell is notin intra-cell handover penalty state, then the MS is handed over to the serving cell. A channelwith different frequency band, different frequencies set, different TRX, or different timeslotis preferred (priority: different frequency band > different frequencies set > different TRX> different timeslot).

After the BQ handover succeeds, penalty is performed on the source cell. During the PenaltyTime after BQ HO(s), the Penalty Level after BQ HO is subtracted from the level of the sourcecell to avoid an immediate handover back to the source cell.

If the triggering conditions of BQ handover are met, and there is no 2G candidate cell, thefollowing operation is performed:



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Rapid Level Drop Handover

This describes rapid level drop handover. Rapid level drop handover is a kind of emergencyhandover.

If the mean value filtering and P/N decision methods are used in edge handover and PBGThandover, responses to short-period rapid level drop are insensitive. Therefore, targeting therapid level drop, you can perform finite impact response (FIR) filtering on the original RX levelsignals. This filtering method is responsive to the rapid level drop based on the drop slope ofthe original RX level signals.

Triggering Conditions

If Rx_Level_Drop HO Allowed is set to Yes, the triggering conditions of rapid level drophandover are as follows:

l If the measurement reports that the BSC received are pre-processed, the flag bit in themeasurement report will be used for handover decision directly.

l If the measurement reports that the BSC received are not pre-processed, then the rapid leveldrop handover is triggered when the corresponding specifications between original RXlevel, Edge HO UL RX_LEV Threshold, Filter Parameter A1–A8, and FilterParameter B are met.

The rapid level drop handover is triggered if either of the previous conditions is met.


A target cell should be the cell with the highest priority in the list of sorted candidate cells afterthe preprocessing procedure. In addition, the target cell should meet the following limitations:

l The target cell has a higher priority than the serving cell.

l The MS cannot be handed over to the serving cell.

If the triggering conditions of rapid level drop handover are met, and there is no 2G candidatecell, the following operation is performed:



Interference Handover

This describes interference handover. Interference handover is a kind of emergency handover.

Interference handover protects the interfered calls and reduce the network interference bydetecting scenarios where the calls are interfered.



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The difference between interference handover and BQ handover is that the BQ handover detectsthe bad quality caused both by coverage and interference. The interference handover does notdetect the bad quality caused coverage.

Triggering ConditionsIf the Interference HO Allowed is set to Yes, the triggering conditions of interference handoverare as follows:

l The uplink RX quality after filtering is greater than or equal to the RX quality thresholdsupposed in current uplink RX level

l The downlink RX quality after filtering is greater than or equal to the RX quality thresholdsupposed in current downlink RX level

The interference handover is triggered if either of the previous conditions is met.

The configuration parameters for uplink and downlink RX quality threshold are as follows:

l For non-AMR FR calls, the configuration parameters for RX quality threshold areRXQUAL1n, where 1 ≤ n ≤ 12.

l For AMR FR calls, the configuration parameters for RX quality threshold areRXQUALn (1 ≤ n ≤ 12) and RXLEVOff.– When n = 1, the RX quality threshold is RXQUAL1.

– When 2 ≤ n ≤ 12, the RX quality threshold is RXQUALn + RXLEVOff.

Target Cell SelectionA target cell should have the highest priority among the candidate cells. In addition, a target cellshould meet the following conditions:

l If Intracell HO Allowed is set to Yes and if the intra-cell handover penalty timer expires,then the serving cell can be the target cell.

NOTE

When a number of consecutive handovers occur, Forbidden time after MAX Times is triggered,the intra-cell handover is forbidden for a corresponding period.

l If the filtered level of a neighbor cell ≥ Inter-layer HO Threshold of the neighbor cell+ Adjacent Cell Inter-layer HO Hysteresis-64, the neighbor cell can serve as a targetcell.

If the triggering conditions of interference handover are met, and there is no 2G candidate cell,the following operation is performed:



No Downlink Measurement Report HandoverThis describes no downlink measurement report handover. The handover performs handoverdecision based on the uplink quality to keep a call sustainable and to minimize the possibilityof call drops.


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The no downlink measurement report handover is generally caused by poor radio environmenton the uplink. In this case, the requirements of the filtering algorithm cannot be met, so otherhandover algorithms cannot be triggered.

Triggering ConditionsThe triggering conditions of no downlink measurement report handover are as follows:

l No Dl Mr.HO Allowed is set to Yes.

l The measurement report of the call does not have downlink part currently.

l The value of the uplink quality after filtering treatment is greater than or equal to No DlMr.Ul Qual HO Limit.

l The number of lost downlink MRs is smaller than Cons.No Dl Mr.HO Allowed Limit.

l For TCH, the number of saved MRs with uplink quality value is greater than Filter Lengthfor TCH Qual; for SDCCH, the number of saved MRs with uplink quality value is greaterthan Filter Length for SDCCH Qual.

When all the previous conditions are met, the no downlink measurement report handover istriggered.

Target Cell SelectionThe selection conditions for target cell are as follows:

l The sorted neighbor cells recorded in the last complete measurement report are saves ascandidate cells.

l The MS is preferably handed over to a neighbor cell.

l If there is no neighbor cell, the MS is handed over to the serving cell.

Enhanced Dual-Band Network HandoverThis describes enhance dual-band network handover, which is a handover decision based on thetraffic volume of the overlaid and underlaid subcells and on the level quality.

Enhanced dual-band network handover is classified into the following:

l Handover due to high underlaid subcell load

l Handover due to low underlaid subcell load

l Call movement handover in the overlaid subcell

Triggering ConditionsThe triggering conditions of the handover due to high underlaid subcell load are as follows:

l The load of the underlaid subcell in the cell is higher than or equal to UL Subcell GeneralOverload Threshold.

l The load of the overlaid subcell in the cell is lower than Inner Cell Serious OverLoadThred.

l The system flow is not higher than Allowed Flow Control Level of UL And OL SubcellHO.

l The current call is within the handover margin that allows handover.



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When all the previous conditions are met, the handover due to high underlaid subcell load istriggered.

If the load of the underlaid subcell in the cell is higher than or equal to UL Subcell SeriousOverload Threshold, then Handover Period = UL Subcell Load Hierarchical HO Period -Modified Step Length of UL Load HO Period, and Step Length of UL Subcell Load HOremains the same.

The triggering conditions of the handover due to low underlaid subcell load are as follows:

l The load of the underlaid subcell in the cell is lower than UL Subcell Lower LoadThreshold.

l The system flow is not higher than Allowed Flow Control Level of UL And OL SubcellHO.

l The current call is within the handover margin that allows handover.

When all the previous conditions are met, the handover due to high underlaid subcell load istriggered.

The triggering conditions of the call movement handover in the overlaid subcell are as follows:

l SSserving < Thdouter

l SS(u) - SS(n) < ATCB_THRD - ATCB_HYST

The handover in the overlaid subcell is triggered if either of the previous conditions is met.

– SSserving: indicates the compensated downlink RX level in the serving cell afterfiltration.

– Thdouter: indicates Outgoing OL Subcell HO level Threshold.

– SS(u): indicates the downlink level (power compensation is performed on the downlinklevel based on measurement) of the underlaid subcell where the call is originated. If theSS(u) value cannot be obtained, you can infer that the decision of enhanced dual-bandnetwork handover is not performed and the decision condition is met by default.

– SS(n): The optimum neighbor cell is a cell, the measured value of whose BCCH levelis the greatest, among the neighbor cells. The optimum neighbor cell is on the samefrequency band, layer, and level with the underlaid subcell. The cell, however, is notco-sited with the underlaid subcell. SS(n) is the value of such a cell. If such a cell isunavailable, the value of SS(n) is –110 dBm.

– ATCB_THRD: indicates Distance Between Boudaries of UL And OL Subcells.

– ATCB_HYST: indicates Distance Hysterisis Between Boudaries of UL And OLSubcells.

NOTE

l For the ATCB handover algorithm, the boundaries of the overlaid and underlaid subcells are determinedaccording to the relative value between the signal strength of serving cell and that of the neighbor cell.When SS(s) = SS(n), the system considers that it is the boundary point of the underlaid subcell. WhenSS(s) - SS(n) > ATCB_THRD, it is the coverage area of the overlaid subcell. The coverage area of theoverlaid subcell is determined according to the different networking and coverage conditions of theexisting network. In addition, the overlaid subcell of the serving cell and the overlaid of the neighborcell will never overlap no matter how the distance between the BTSs changes.

l The handover zone indicates the level range. In the case of overlaid/underlaid load handover on theenhanced dual-band network, the handover is performed level by level and the MS whose downlinklevel is within the handover zone is handed over.


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The target cell selection has the following restrictions:

l For the handover due to high underlaid subcell load, the MS can be handed over to onlythe overlaid subcell.

l For the handover due to low underlaid subcell load, the MS can be handed over to only theunderlaid subcell.

l For the call movement handover in the overlaid subcell, the MS is handed over to theneighbor cell that ranks first among the neighbor cells. The MS cannot be handed over tothe cell that ranks behind the serving cell. The target cell is generally the underlaid subcell.It can also be other neighbor cells.

Limitations

The limitations on the handover due to high underlaid subcell load are as follows:

l The cell where the call is located is on the enhanced dual-band network. TheHW_Concentric Attribute is set to Underlay cell.

l The Load HO From UL Subcell to OL Subcell Allowed parameter is set.

l The maximum range of the handover zone is 63 to Incoming OL Subcell HO levelThreshold. The handover starts from the high level.

The limitations on the handover due to low underlaid subcell load are as follows:

l The cell where the call is located is on the enhanced dual-band network. TheHW_Concentric Attribute is set to Overlay cell.

l The Load HO of OL Subcell to UL Subcell Enabled parameter is set.

l The maximum range of the handover zone is 63 to Outgoing OL Subcell HO levelThreshold. The handover starts from the low level.

The limitations on call movement handover in the overlaid subcell are as follows:

l The cell where the call is located is on the enhanced dual-band network. TheHW_Concentric Attribute is set to Overlay cell.

Effect of the Enhanced Dual-Band Network Handover on the Existing Algorithm

The effect of the enhanced dual-band network handover on the existing algorithm is as follows:

l On the enhanced dual-band network, to prevent the common load handover from collidingwith the handover between OL subcell and UL subcell on the network, for the commonload handover of the cells on the network, the MS cannot be handed over to the cell in thesame group when the load handover switches between the overlaid subcell and the underlaidsubcell on the network (Load HO From UL Subcell to OL Subcell Allowed and LoadHO of OL Subcell to UL Subcell Enabled) are enabled.

l Because the PBGT handover algorithm may cause inter-cell handover, the MS cannot behanded over the cell in the same group in the case of PBGT handover between the cells onthe enhanced dual-band network.



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Load HandoverThis describes load handover. In the network, some cells have heavy loads, but the overlappedupper-layer cells and the neighbor cells have light loads. To balance the loads of these cells, loadhandover is required.

In a load handover procedure, some loads in heavy-load cells are handed over to light-load cells.In addition, the loads in neighbor cells should not be handed over to heavy-load cells.

The load handover is only for the 2G inter-cell handover and cannot be used for 2G -> 3Ghandover. Load handover can be performed in cells at different layers. Load sharing, however,can be performed in only one BSC. Figure 1-2 shows the load handover.

Figure 1-2 Load handover

A cell witha heavy load



A cell witha light load




To perform load sharing, increase Edge HO DL RX_LEV Threshold so that the traffic on theedge of a cell is handed over to a neighbor cell with light load.

The traffic load of a cell can be determined through the ratio of the traffic flow (generally TCHusage) of the cell to the preset threshold. If the traffic flow of a cell is greater than the Load HOThreshold, you can infer that the traffic load of this cell is heavy. The load handover algorithmneeds to be enabled. If the traffic flow of a cell is smaller than the Load Req. on CandidateCell, you can infer that the traffic load of this cell is light and the cell can receive loads from theheavy-load cells.

Load handover may trigger many handovers, so you should consider the load of the system CPUbefore triggering load handover. In other words, you should consider the system traffic levelbefore triggering load handover. In addition, to prevent too many MSs from being handed overat a time, load handover is performed step by step. In other words, the edge handover thresholdincreases based on Load HO Step Level (CLS_Ramp) and Load HO Step Period(CLS_Period). The increase stops until the increased volume equals Load HO Bandwidth(CLS_Offset), as shown in Figure 1-3.


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Figure 1-3 Load handover

CONF_HO_RXLEV

CONF_HO_RXLEV+CLS_Ramp

CONF_HO_RXLEV+CLS_Offset

Cell A Cell B

Border of normal handoverLoad handover band


If the Load HO Allowed is set to Yes, the triggering conditions of load handover are as follows:

l The CPU usage of the system is smaller than or equal to System Flux Threshold for LoadHO.

l The current load of the serving cell is greater than or equal to Load HO Threshold.


The selection conditions for target cell are as follows:

l Filtered RX level after penalty ≥ Inter-layer HO Threshold + Adjacent Cell Inter-layerHO Hysteresis-64.


l If the target cell is in the same BSC with the source cell, then the current load of the targetcell is lower than Load Req.on Candidate Cell.

l If the target cell is not in the same BSC with the source cell, then the load handover occurswhen the target cell is not 100% occupied.

Examples

The system assigns MSs to different load handover bands based on the downlink RX level. Theload handover algorithm performs handover on the cell so that the MS is handed over out of thecell step by step.

1. The MSs in load handover band 1 are handed over to the neighbor cells. Load handoverband 1 refers to the area where the downlink level ranges from Edge HO DL RX_LEVThreshold to Edge HO DL RX_LEV Threshold + Load HO Step Level.

2. After one Load HO Step Period, the MSs in load handover band 2 are handed over to theneighbor cells. Load handover band 2 refers to the area where the downlink level rangesfrom Edge HO DL RX_LEV Threshold to Edge HO DL RX_LEV Threshold + (2 xLoad HO Step Level).

3. The load handover stops when the flow of the cell is less than or equal to Load HOThreshold.



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Load handover uses the step-by-step outgoing handover mode so that the possibility of a sharpincrease in CPU load is eliminated and the occurrence of call drops due to congested target cellis avoided.

Edge Handover

This describes edge handover. Based on level, edge handover is a kind of general handover.

If edge handover is triggered, the level of the target cell should be at least one hysteresis value(Inter-cell HO Hysteresis) higher than the level of the serving cell.


If Fringe HO Allowed is set to Yes, the triggering conditions of edge handover are as follows:

l One of the following conditions is met.– The filtered downlink RX level of the serving cell is smaller than Edge HO DL

RX_LEV Threshold– The filtered uplink RX level of the serving cell is smaller than Edge HO UL RX_LEV

Thresholdl The RX level of neighbor cell is greater than the sum of the RX level of serving cell and

Inter-cell HO Hysteresis.

The edge handover is triggered when the P/N criterion is met, that is, the previous conditionsare met for Edge HO Valid Time(s) during Edge HO Watch Time(s).

Figure 1-4 shows the edge handover.

Figure 1-4 Edge handover

Cell 2Cell 1

-97 dBm -85 dBm


A target cell should have the highest priority among the candidate cells. In addition, a target cellshould meet the following conditions:


l After the sorting, the target cell must have a higher priority than the serving cell.

A cell can become a target cell if the previous conditions are met for Edge HO AdjCell ValidTime(s) during Edge HO AdjCell Watch Time(s).

If the triggering conditions of edge handover are met, and there is no 2G candidate cell, thefollowing operation is performed:


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l If no neighbor 3G cell is available, or Outgoing-RAT HO Allowed is set to No, or the MSdoes not support the 2G/3G inter-RAT handover, then the decision on another handovertype is performed.

Fast-Moving Micro Cell HandoverThis describes fast-moving micro cell handover. In fast-moving micro cell handover mode, thehandover from a micro cell to a macro cell is performed according to the relative speed of anMS so that the number of handovers can be minimized.

Fast-moving micro cell handover applies to the following scenarios:

l If an MS in the micro cell moves relatively fast, then the MS is handed over to a macrocell.

l To prevent the MS that is moving fast in a macro cell from entering a micro cell, timepenalty is performed on the micro cell so that the fast moving MS camps on the macro cell.

Figure 1-5 shows the fast-moving micro cell handover.

Figure 1-5 Fast-moving micro cell handover

Umbrella cell

Micro cell

Triggering ConditionsIf MS Fast Moving HO Allowed is set to Yes, the handover decision procedure of fast-movingmicro cell handover is as follows:

1. When the triggering conditions of edge handover or PBGT handover are met, the fast-moving micro cell handover decision is started.

2. When the period during which the MS camps on a serving cell is shorter than MS Fast-moving Time Threshold, the number of cells that the MS passes in fast movement countedby the system is added by one.

NOTE

The cell counted by the system must locates at a layer smaller than layer 4. In other words, the cellmust be non-Umbrella cell.

3. When the number of cells that the MS passes in fast movement reaches MS Fast-movingWatch Cells, if the number of cells that the MS passes in fast movement counted by the



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system is greater than or equal to MS Fast-moving Valid Cells, the fast-moving micro cellhandover is triggered.


A target cell should have the highest priority among the candidate cells. In addition, a target cellshould meet the following conditions:

l The number of the layer where a target cell is located must be layer 4. In other words, atarget cell must be an Umbrella cell.

l Filtered RX level of a target cell ≥ Inter-layer HO Threshold + Adjacent Cell Inter-layer HO Hysteresis-64.

l After the sorting, the target cell must have the highest priority.

Limitations

After the fast-moving micro cell handover is successful, penalty is performed on all the neighbormicro cells. During Penalty Time on Fast Moving HO(s), Penalty on MS Fast Moving HOis subtracted from the RX level of neighbor micro cells.

Cell Layer and Cell Hierarchy

Through the multiband handover algorithm developed by Huawei, a proper traffic volumedistribution can be realized among multiple frequency bands.

Huawei multiband handover algorithm divides cells into four layers with 16 hierarchies in eachlayer. Thus, the cells are grouped by Layer of the Cell and are applicable for complexnetworking modes. Figure 1-6 shows the cell layers.

Figure 1-6 Cell layer

Layer 4

Layer 3

Layer 2

Layer 1

Macro Cell

Micro Cell

Pico Cell

Umbrella CellGSM900

GSM900GSM900

DCS1800DCS1800

GSM900GSM900 GSM900GSM900

DCS1800DCS1800

DCS1800DCS1800DCS1800

GSM900

In the multiband handover algorithm developed by Huawei, a GSM network covering a certainarea is divided into four layers, which are described as follows.


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l Layer 4: Umbrella cell. The umbrella cell is generally a GSM900 cell with wide coverage.This type of cell is used for coverage and fast MS connection.

l Layer 3: Macro cell. The macro cell is generally composed of GSM900 cells. This type ofcell is most commonly used in the current GSM system, serving the majority of users.

l Layer 2: Micro cell. The micro cell is generally composed of DCS1800 cells with smallcoverage. This type of cell is used for capacity expansion, relieving the insufficiency offrequency resources.

l Layer 1: Pico cell. The pico cell is generally composed of DCS1800 cells. This type of cellis used in hot spots and blind spots.

The cell in the low layer has a high priority.

Inter-Layer (Better Cell) Handover

This describes inter-layer (better cell) handover. Inter-layer (better cell) handover is a kind ofgeneral handover to enable the cells in lower layer level (with great layer level value) to absorbtraffic.

To balance the traffic volume flexibly and to meet the requirements of different topology modes,the GSM network is divided into several layers. For details, refer to 1.3.2.10 Fast-Moving MicroCell Handover.


If Level HO Allowed is set to Yes, the triggering conditions of inter-layer handover are asfollows:

l The target cell camps on the lower layer than the serving cell, that is, the priority level ofthe target cell is higher than that of the serving cell.

l Filtered downlink RX level of the target cell ≥ Inter-layer HO Threshold + AdjacentCell Inter-layer HO Hysteresis-64.

l After the sorting, the target cell must have a higher priority than the serving cell.

The inter-layer handover is triggered when the P/N criterion is met, that is, the previousconditions are met for Layer HO Valid Time(s) during Layer HO Watch Time(s).


The selection conditions for target cell are as follows:

l The triggering conditions are met.

l The serving cell cannot serve as the target cell.

l Among the sorted candidate cells after the preprocessing procedures, the target cell has thehighest priority.

PBGT Handover

This describes power budget (PBGT) handover. The PBGT handover is a kind of generalhandover.



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Triggering ConditionsIf the PBGT HO Allowed is set to Yes, the triggering conditions of PBGT handover are asfollows:

l The target cell and the serving cell are at the same layer and in the same hierarchy.

l The downlink level meets the following formula for PBGT Valid Time(s) during PBGTWatch Time(s):(MIN(MS_TXPWR_MAX,P) – RXLEV_DL – PWR_DIFF) – (MIN(MS_TXPWR_MAX(n),P) – RXLEV_NCELL(n)) > PBGT_HO_MARGINThe parameters are described as follows:– RXLEV_DL: It indicates the downlink receive level in the serving cell after the filtering

treatment. If the enhanced concentric cell function is enabled in the serving cell, thevalue indicates the downlink receive level in the serving cell that serves as the neighborcell, that is, the downlink receive level of BCCH TRXs.

– MS_TXPWR_MAX: It indicates the maximum transmit power of an MS permitted inthe serving cell.

– MS_TXPWR_MAX (n): It indicates the maximum transmit power of an MS permittedin neighbor cell n.

– RxLev_NCELL (n): It indicates the downlink receive level in neighbor cell n.

– PWR_DIFF: It indicates the difference between the maximum downlink transmit powerin the serving cell due to power control and the actual downlink transmit power in theserving cell.

– P: It indicates the maximum transmit power capability of an MS.

– PBGT_HO_MARGIN: It is the difference between the PBGT HO Threshold of theserving cell and 64.

The PBGT handover can be triggered only when all the previous conditions are met.

Target Cell SelectionA target cell should meet the following conditions:

l The target cell and the serving cell are at the same layer and in the same hierarchy.

l The serving cell cannot serve as the target cell.

l Among the sorted candidate cells after the preprocessing procedures, the target cell has thehighest priority.

Other HandoversThis describes other handovers, which consist of AMR handover and better 3G cell handover.

AMR HandoverRefer to AMR.

Better 3G Cell HandoverRefer to 2G/3G Interoperability.


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TIGHT BCCH Handover AlgorithmRefer to BCCH Dense Frequency Multiplexing.

1.4 ImplementationThis describes how to configure the handover and the power boost before handover.

1.4.1 Configuring the HandoverThis describes how to configure handover on the BSC6000 Local Maintenance Terminal.

1.4.2 Configuring Power Boost Before HandoverThis describes how to configure power boost before handover on the BSC6000 LocalMaintenance Terminal.

1.4.1 Configuring the HandoverThis describes how to configure handover on the BSC6000 Local Maintenance Terminal.

ContextBefore configuring the parameters related to the handover decision algorithm, you need toconfigure the relation between neighbor cells.

On the BSC6000 Local Maintenance Terminal, right-click a cell on the Management Treetab page. Then, select Set Adjacent Relation Property on the shortcut menu. A dialog box isdisplayed, as shown in Figure 1-7.



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Figure 1-7 Set Adjacent Relation Property dialog box

Procedure

Step 1 On the BSC6000 Local Maintenance Terminal, right-click a cell on the Management Treetab page. Then, select Configure Cell Attributes.

Step 2 In the displayed dialog box, double-click the target cell in the Cell view list box to add it to theSelected cells list box. Then, click Next.

Step 3 In the Cells to be set list box, select the target cell, and then click Set Cell Properties. A dialogbox is displayed, as shown in Figure 1-8.


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Figure 1-8 Set Cell Attributes dialog box

Step 4 Click Handover Data. A dialog box is displayed, as shown in Figure 1-9.



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Figure 1-9 Set Handover Parameter dialog box

Step 5 Click Advanced. A dialog box is displayed as shown in Figure 1-10. You can set correspondingparameters.


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Figure 1-10 Set Handover Parameter dialog box

l Measurement report preprocessingPreprocessing of a measurement report consists of interpolation and filtering. Figure 1-11shows the parameter configuration.

Figure 1-11 Filter/penalty data configuration

The parameters are as follows:– Allowed M.R Number Lost

– Filter Length for TCH Level

– Filter Length for TCH Qual



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– Filter Length for SDCCH Level– Filter Length for SDCCH Qual– Filter Length for Ncell RX_LEV– Filter Length for TA

l Handover PenaltyThe handover penalty consists of handover failure penalty, BQ handover penalty, TAhandover penalty, fast movement handover penalty, penalty of fast movement handover froma micro cell to a macro cell, and concentric cell handover penalty. Figure 1-11 and Figure1-10 show the parameter configuration.The parameters are as follows:– Penalty Allowed– Penalty Level after HO Fail– Penalty Level after BQ HO– RscPenaltyTimer– UmPenaltyTimer– CfgPenaltyTimer– Penalty Time after BQ HO(s)– Penalty Level after TA HO– Penalty Time after TA HO(s)– Penalty Time after AMR TCHF-H HO Fail(s)

l Neighbor Cell QueuingThe neighbor cell queuing consists of basic cell queuing and adjustment based on networkcharacteristics. Figure 1-10, Figure 1-7, and Figure 1-12 show the parameter configuration.

Figure 1-12 Cell handover data configuration

The parameters are as follows:


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– Min DL level on Candidate Cell

– Min UP Power on HO Candidate Cell

– Min Access Level Offset

– Layer of the Cell

– Cell Priority

– Load HO Threshold

– Load Req.on Candidate Cell

– Inter-layer HO Threshold

– Inter-layer HO Hysteresis

l TA HandoverConfiguration of TA handover parameters is shown in Figure 1-9 and Figure 1-13.

Figure 1-13 Emergency handover parameters configuration

The parameters are as follows:– TA HO Allowed

– TA Threshold

l BQ HandoverConfiguration of BQ handover parameters is shown in Figure 1-9 and Figure 1-13.The parameters are as follows:– BQ HO Allowed

– DL Qual. Threshold

– UL Qual. Threshold

– DLQuaLimitAMRFR

– ULQuaLimitAMRFR



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– DLQuaLimitAMRHR

– ULQuaLimitAMRHR

l Rapid Level Drop HandoverConfiguration of rapid level drop handover parameters is shown in Figure 1-9 and Figure1-13.The parameters are as follows:– Rx_Level_Drop HO Allowed

– Filter Parameter A1–A8

– Filter Parameter B

l Interference HandoverConfiguration of interference handover parameters is shown in Figure 1-9 and Figure1-13.The parameters are as follows:– Interference HO Allowed

– RXQUAL1

– RXQUAL2

– RXQUAL3

– RXQUAL4

– RXQUAL5

– RXQUAL6

– RXQUAL7

– RXQUAL8

– RXQUAL9

– RXQUAL10

– RXQUAL11

– RXQUAL12

– RXLEVOff

l No Downlink Measurement Report HandoverFigure 1-13 and Figure 1-13 show the configuration of no downlink measurement reporthandover parameters.The parameters are as follows:– No Dl Mr.HO Allowed

– No Dl Mr.Ul Qual HO Limit

– Cons. No Dl Mr. HO Allowed Limit

l Load HandoverFigure 1-9 and Figure 1-12 show the configuration of load handover parameters.The parameters are as follows:– Load HO Allowed

– System Flux Threshold for Load HO

– Load HO Threshold


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– Load Req.on Candidate Cell

– Load HO Bandwidth

– Load HO Step Period

– Load HO Step Level

l Edge HandoverFigure 1-9 shows the configuration of edge handover parameters.The parameters are as follows:– Fringe HO Allowed

– Edge HO AdjCell Watch Time(s)

– Edge HO AdjCell Watch Time(s)

– Edge HO UL RX_LEV Threshold

– Edge HO DL RX_LEV Threshold

– Edge HO Watch Time(s)

– Edge HO Valid Time(s)

l Fast-Moving Micro Cell HandoverConfiguration of the parameters of the fast-moving micro cell handover from a micro cell toa macro cell is shown in Figure 1-9 and Figure 1-12.The parameters are as follows:– MS Fast Moving HO Allowed

– MS Fast-moving Watch Cells

– MS Fast-moving Valid Cells

– MS Fast-moving Time Threshold

l Inter-Layer HandoverConfiguration of inter-layer handover parameters is shown in Figure 1-7 and Figure 1-12.The parameters in the previous dialog boxes are listed in Neighbor cell queuing.

l PBGT HandoverConfiguration of PBGT handover parameters is shown in Figure 1-7 and Figure 1-9.The parameters are as follows:– PBGT HO Threshold

– PBGT HO Allowed

– PBGT Watch Time(s)

– PBGT Valid Time(s)

l Quick handoverConfiguration of fast movement handover parameters is shown in Figure 1-9 and Figure1-14.– Quick Handover Enable

– Quick Handover Up Triger Level(dB)

– Quick Handover Down Triger Level(dB)

– Quick Move Speed Thres(m/s)

– Quick Handover Static Time(0.5s)



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– Quick Handover Last Time (0.5s)

– Serving Cell Filter Length MR Number

– Neighbor Cell Filter Length MR Number

– Quick Handover Punish Time

– Ignore Measurement Report Number

– Quick Handover Offset(dB)

– Quick Handover Punish Value(dB)

– Quick Handover Punish Time(s)

– Chain Neighbor Cell

NOTE

For the setting of Chain Neighbor Cell, refer to Figure 1-7.

Figure 1-14 Quick handover parameters configuration

l AMR Handover

Refer to AMR.

l Better 3G Cell Handover

Refer to 2G/3G Interoperability.

l Data Configuration of the Neighbor Cell

Data configuration of neighbor cell is shown in Figure 1-7.

The parameters are as follows:

– Min Access Level Offset

– PBGT HO Threshold

– Adjacent Cell Inter-layer HO Hysteresis

----End


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1.4.2 Configuring Power Boost Before HandoverThis describes how to configure power boost before handover on the BSC6000 LocalMaintenance Terminal.

Procedure

Step 1 On the BSC6000 Local Maintenance Terminal, right-click a cell on the Management Treetab page. Then, select Configure Cell Attributes.

Step 2 In the displayed dialog box, double-click the target cell in the Cell view list box to add it to theSelected cells list box. Then, click Next.

Step 3 In the Cells to be set list box, select the target cell, and then click Set Cell Properties. A dialogbox is displayed, as shown in Figure 1-15.

Figure 1-15 Set Cell Attributes dialog box



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Step 4 Click Other Attributes. A dialog box is displayed, as shown in Figure 1-16.

Set Power Boost before HO enabled or not.

Figure 1-16 Set Other Parameter dialog box

Step 5 Click OK. The configuration is complete.

----End

1.5 Maintenance InformationThis lists the performance counters related to handover.

Alarms

None

Counters

Table 1-5 lists the counters related to handover.


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Table 1-5 Counters related to handover

Counter Description

H3000 Internal Intra-Cell Handover Requests (SDCCH)

H3009 Internal Intra-Cell Handover Requests (TCH)

H3010 Internal Intra-Cell Handover Commands(SDCCH)

H3017 Internal Intra-Cell Handover Commands(TCHF)

H3018 Internal Intra-Cell Handover Commands(TCHH)

H3020 Failed Internal Intra-Cell Handovers (SDCCH)

H3029 Failed Internal Intra-Cell Handovers (TCH)

H3020A Failed Internal Intra-Cell Handovers (ChannelUnavailable) (SDCCH)

H3029A Failed Internal Intra-Cell Handovers (ChannelUnavailable) (TCH)

H302B Failed Internal Intra-Cell Handovers (TerrestrialResource Request Failed)

H302G Failed Internal Intra-Cell Handovers (A InterfaceFailure)

H3020C Failed Internal Intra-Cell Handovers (TimerExpired) (SDCCH)

H3027Cb Failed Internal Intra-Cell Handovers (TimerExpired) (TCHF) (Signaling Channel)

H3028Cb Failed Internal Intra-Cell Handovers (TimerExpired) (TCHH) (Signaling Channel)

H3027Ca Failed Internal Intra-Cell Handovers (TimerExpired) (TCHF) (Traffic Channel)

H3028Ca Failed Internal Intra-Cell Handovers (TimerExpired) (TCHH) (Traffic Channel)

H302Da Failed Internal Intra-Cell Handovers(Reconnection to Old Channels) (AbnormalRelease, Unspecified)

H302Db Failed Internal Intra-Cell Handovers(Reconnection to Old Channels) (AbnormalRelease, Channel Unacceptable)

H302Dc Failed Internal Intra-Cell Handovers(Reconnection to Old Channels) (AbnormalRelease, Timer Expired)



1-39

Counter Description

H302Dd Failed Internal Intra-Cell Handovers(Reconnection to Old Channels) (AbnormalRelease, No Activity on the Radio Path)

H302De Failed Internal Intra-Cell Handovers(Reconnection to Old Channels) (PreemptiveRelease)

H302Df Failed Internal Intra-Cell Handovers(Reconnection to Old Channels) (HandoverFailed, Timing Advance out of Range)

H302Dg Failed Internal Intra-Cell Handovers(Reconnection to Old Channels) (Channel ModeUnavailable)

H302Dh Failed Internal Intra-Cell Handovers(Reconnection to Old Channels) (FrequencyUnavailable)

H302Di Failed Internal Intra-Cell Handovers(Reconnection to Old Channels) (Call AlreadyCleared)

H302Dj Failed Internal Intra-Cell Handovers(Reconnection to Old Channels) (SemanticallyIncorrect Message)

H302Dk Failed Internal Intra-Cell Handovers(Reconnection to Old Channels) (InvalidMandatory Information)

H302Dl Failed Internal Intra-Cell Handovers(Reconnection to Old Channels) (Message TypeNon-existent or Not Implemented)

H302Dm Failed Internal Intra-Cell Handovers(Reconnection to Old Channels) (Message TypeNot Compatible with Protocol State)

H302Dn Failed Internal Intra-Cell Handovers(Reconnection to Old Channels) (Conditional IEError)

H302Do Failed Internal Intra-Cell Handovers(Reconnection to Old Channels) (No CellAllocation Available)

H302Dp Failed Internal Intra-Cell Handovers(Reconnection to Old Channels) (Protocol ErrorUnspecified)

H302Dq Failed Internal Intra-Cell Handovers(Reconnection to Old Channels) (Other Causes)


Handover


Issue 02 (2008-06-30)

Counter Description

H3002 Internal Intra-Cell Handover Requests (Underlayto Overlay)

H3001 Internal Intra-Cell Handover Requests (Overlayto Underlay)

H3012 Internal Intra-Cell Handover Commands(Underlay to Overlay)

H3011 Internal Intra-Cell Handover Commands(Overlay to Underlay)

H3022A Failed Internal Intra-Cell Handovers (ChannelUnavailable) (Underlay to Overlay)

H3021A Failed Internal Intra-Cell Handovers (ChannelUnavailable) (Overlay to Underlay)

H3022M Failed Internal Intra-Cell Handovers (OtherCauses) (Underlay to Overlay)

H3021M Failed Internal Intra-Cell Handovers (OtherCauses) (Overlay to Underlay)

H3003A Internal Intra-Cell Handover Requests (DynamicConversion, TCHF-TCHH)

H3003B Internal Intra-Cell Handover Requests (DynamicConversion, TCHH-TCHF)

H3004A Internal Intra-Cell Handover Requests (DynamicConversion, TCH-SDCCH)

H3004B Internal Intra-Cell Handover Requests (DynamicConversion, SDCCH-TCH)

H3013A Internal Intra-Cell Handover Commands(Dynamic Conversion, TCHF-TCHH)

H3013B Internal Intra-Cell Handover Commands(Dynamic Conversion, TCHH-TCHF)

H3014A Internal Intra-Cell Handover Commands(Dynamic Conversion, TCH-SDCCH)

H3014B Internal Intra-Cell Handover Commands(Dynamic Conversion, SDCCH-TCH)

H3023A Failed Internal Intra-Cell Handovers (DynamicConversion, TCHF-TCHH)

H3023B Failed Internal Intra-Cell Handovers (DynamicConversion, TCHH-TCHF)

H3024A Failed Internal Intra-Cell Handovers (DynamicConversion, TCH-SDCCH)



1-41

Counter Description

H3024B Failed Internal Intra-Cell Handovers (DynamicConversion, SDCCH-TCH)

H3055A Internal Intra-Cell Handovers Not Initiated(AMR) (TCHF-TCHH)

H3055B Internal Intra-Cell Handovers Not Initiated(AMR) (TCHH-TCHF)

H3005A Internal Intra-Cell Handover Requests (AMR)(TCHF-TCHH)

H3005B Internal Intra-Cell Handover Requests (AMR)(TCHH-TCHF)

H3015A Internal Intra-Cell Handover Commands (AMR)(TCHF-TCHH)

H3015B Internal Intra-Cell Handover Commands (AMR)(TCHH-TCHF)

H3025A Failed Internal Intra-Cell Handovers (AMR)(TCHF-TCHH)

H3025B Failed Internal Intra-Cell Handovers (AMR)(TCHH-TCHF)

H3040 Internal Intra-Cell Handover Detection MessagesReceived by BSC (SDCCH)

H3047 Internal Intra-Cell Handover Detection MessagesReceived by BSC (TCHF)

H3048 Internal Intra-Cell Handover Detection MessagesReceived by BSC (TCHH)

H3200W Incoming Internal Inter-Cell Handover Requests(SDCCH) (900/850-900/850)

H3200X Incoming Internal Inter-Cell Handover Requests(SDCCH) (1800/1900-1800/1900)

H3200Y Incoming Internal Inter-Cell Handover Requests(SDCCH) (900/850-1800/1900)

H3200Z Incoming Internal Inter-Cell Handover Requests(SDCCH) (1800/1900-900/850)

H3209W Incoming Internal Inter-Cell Handover Requests(TCH) (900/850-900/850)

H3209X Incoming Internal Inter-Cell Handover Requests(TCH) (1800/1900-1800/1900)

H3209Y Incoming Internal Inter-Cell Handover Requests(TCH) (900/850-1800/1900)


Handover


Issue 02 (2008-06-30)

Counter Description

H3209Z Incoming Internal Inter-Cell Handover Requests(TCH) (1800/1900-900/850)

H3210W Incoming Internal Inter-Cell HandoverResponses (SDCCH) (900/850-900/850)

H3210X Incoming Internal Inter-Cell HandoverResponses (SDCCH) (1800/1900-1800/1900)

H3210Y Incoming Internal Inter-Cell HandoverResponses (SDCCH) (900/850-1800/1900)

H3210Z Incoming Internal Inter-Cell HandoverResponses (SDCCH) (1800/1900-900/850)

H3217W Incoming Internal Inter-Cell HandoverResponses (TCHF) (900/850-900/850)

H3217X Incoming Internal Inter-Cell HandoverResponses (TCHF) (1800/1900-1800/1900)

H3217Y Incoming Internal Inter-Cell HandoverResponses (TCHF) (900/850-1800/1900)

H3217Z Incoming Internal Inter-Cell HandoverResponses (TCHF) (1800/1900-900/850)

H3218W Incoming Internal Inter-Cell HandoverResponses (TCHH) (900/850-900/850)

H3218X Incoming Internal Inter-Cell HandoverResponses (TCHH) (1800/1900-1800/1900)

H3218Y Incoming Internal Inter-Cell HandoverResponses (TCHH) (900/850-1800/1900)

H3218Z Incoming Internal Inter-Cell HandoverResponses (TCHH) (1800/1900-900/850)

H3220W Failed Incoming Internal Inter-Cell Handovers(SDCCH) (900/850-900/850)

H3220X Failed Incoming Internal Inter-Cell Handovers(SDCCH) (1800/1900-1800/1900)

H3220Y Failed Incoming Internal Inter-Cell Handovers(SDCCH) (900/850-1800/1900)

H3220Z Failed Incoming Internal Inter-Cell Handovers(SDCCH) (1800/1900-900/850)

H3229W Failed Incoming Internal Inter-Cell Handovers(TCH) (900/850-900/850)

H3229X Failed Incoming Internal Inter-Cell Handovers(TCH) (1800/1900-1800/1900)



1-43

Counter Description

H3229Y Failed Incoming Internal Inter-Cell Handovers(TCH) (900/850-1800/1900)

H3229Z Failed Incoming Internal Inter-Cell Handovers(TCH) (1800/1900-900/850)

H3220A Failed Incoming Internal Inter-Cell Handovers(No Channel Available) (SDCCH)

H3229A Failed Incoming Internal Inter-Cell Handovers(No Channel Available) (TCH)

H322B Failed Incoming Internal Inter-Cell Handovers(Terrestrial Resource Request Failed)

H322D Failed Incoming Internal Inter-Cell Handovers(Reconnection to Old Channels)

H322G Failed Incoming Internal Inter-Cell Handovers(A Interface Failure)

H3220C Failed Incoming Internal Inter-Cell Handovers(Timer Expired) (SDCCH)

H3227Cb Failed Incoming Internal Inter-Cell Handovers(Timer Expired) (TCHF) (Signaling Channel)

H3228Cb Failed Incoming Internal Inter-Cell Handovers(Timer Expired) (TCHH) (Signaling Channel)

H3227Ca Failed Incoming Internal Inter-Cell Handovers(Timer Expired) (TCHF) (Traffic Channel)

H3228Ca Failed Incoming Internal Inter-Cell Handovers(Timer Expired) (TCHH) (Traffic Channel)

H3240 Incoming Internal Inter-Cell Handover DetectionMessages Received by BSC (SDCCH)

H3247 Incoming Internal Inter-Cell Handover DetectionMessages Received by BSC (TCHF)

H3248 Incoming Internal Inter-Cell Handover DetectionMessages Received by BSC (TCHH)

H3100W Outgoing Internal Inter-Cell Handover Requests(SDCCH) (Excluding Directed Retry)(900/850-900/850)

H3100X Outgoing Internal Inter-Cell Handover Requests(SDCCH) (Excluding Directed Retry)(1800/1900-1800/1900)

H3100Y Outgoing Internal Inter-Cell Handover Requests(SDCCH) (Excluding Directed Retry)(900/850-1800/1900)


Handover


Issue 02 (2008-06-30)

Counter Description

H3100Z Outgoing Internal Inter-Cell Handover Requests(SDCCH) (Excluding Directed Retry)(1800/1900-900/850)

H3107W Outgoing Internal Inter-Cell Handover Requests(TCHF) (Excluding Directed Retry)(900/850-900/850)

H3107X Outgoing Internal Inter-Cell Handover Requests(TCHF) (Excluding Directed Retry)(1800/1900-1800/1900)

H3107Y Outgoing Internal Inter-Cell Handover Requests(TCHF) (Excluding Directed Retry)(900/850-1800/1900)

H3107Z Outgoing Internal Inter-Cell Handover Requests(TCHF) (Excluding Directed Retry)(1800/1900-900/850)

H3108W Outgoing Internal Inter-Cell Handover Requests(TCHH) (Excluding Directed Retry)(900/850-900/850)

H3108X Outgoing Internal Inter-Cell Handover Requests(TCHH) (Excluding Directed Retry)(1800/1900-1800/1900)

H3108Y Outgoing Internal Inter-Cell Handover Requests(TCHH) (Excluding Directed Retry)(900/850-1800/1900)

H3108Z Outgoing Internal Inter-Cell Handover Requests(TCHH) (Excluding Directed Retry)(1800/1900-900/850)

H3101W Outgoing Internal Inter-Cell Handover Requests(Directed Retry) (900/850-900/850)

H3101X Outgoing Internal Inter-Cell Handover Requests(Directed Retry) (1800/1900-1800/1900)

H3101Y Outgoing Internal Inter-Cell Handover Requests(Directed Retry) (900/850-1800/1900)

H3101Z Outgoing Internal Inter-Cell Handover Requests(Directed Retry) (1800/1900-900/850)

H3110W Outgoing Internal Inter-Cell HandoverCommand (SDCCH) (Excluding Directed Retry)(900/850-900/850)

H3110X Outgoing Internal Inter-Cell HandoverCommands (SDCCH) (Excluding Directed Retry)(1800/1900-1800/1900)



1-45

Counter Description

H3110Y Outgoing Internal Inter-Cell HandoverCommands (SDCCH) (Excluding Directed Retry)(900/850-1800/1900)

H3110Z Outgoing Internal Inter-Cell HandoverCommands (SDCCH) (Excluding Directed Retry)(1800/1900-900/850)

H3117W Outgoing Internal Inter-Cell HandoverCommands (TCHF) (Excluding Directed Retry)(900/850-900/850)

H3117X Outgoing Internal Inter-Cell HandoverCommands (TCHF) (Excluding Directed Retry)(1800/1900-1800/1900)

H3117Y Outgoing Internal Inter-Cell HandoverCommands (TCHF) (Excluding Directed Retry)(900/850-1800/1900)

H3117Z Outgoing Internal Inter-Cell HandoverCommands (TCHF) (Excluding Directed Retry)(1800/1900-900/850)

H3118W Outgoing Internal Inter-Cell HandoverCommands (TCHH) (Excluding Directed Retry)(900/850-900/850)

H3118X Outgoing Internal Inter-Cell HandoverCommands (TCHH) (Excluding Directed Retry)(1800/1900-1800/1900)

H3118Y Outgoing Internal Inter-Cell HandoverCommands (TCHH) (Excluding Directed Retry)(900/850-1800/1900)

H3118Z Outgoing Internal Inter-Cell HandoverCommands (TCHH) (Excluding Directed Retry)(1800/1900-900/850)

H3111W Outgoing Internal Inter-Cell HandoverCommands (Directed Retry) (900/850-900/850)

H3111X Outgoing Internal Inter-Cell HandoverCommands (Directed Retry)(1800/1900-1800/1900)

H3111Y Outgoing Internal Inter-Cell HandoverCommands (Directed Retry) (900/850-1800/1900)

H3111Z Outgoing Internal Inter-Cell HandoverCommands (Directed Retry) (1800/1900-900/850)


Handover


Issue 02 (2008-06-30)

Counter Description

H3120W Failed Outgoing Internal Inter-Cell Handovers(SDCCH) (Excluding Directed Retry)(900/850-900/850)

H3120X Failed Outgoing Internal Inter-Cell Handovers(SDCCH) (Excluding Directed Retry)(1800/1900-1800/1900)

H3120Y Failed Outgoing Internal Inter-Cell Handovers(SDCCH) (Excluding Directed Retry)(900/850-1800/1900)

H3120Z Failed Outgoing Internal Inter-Cell Handovers(SDCCH) (Excluding Directed Retry)(1800/1900-900/850)

H3127W Failed Outgoing Internal Inter-Cell Handovers(TCHF) (Excluding Directed Retry)(900/850-900/850)

H3127X Failed Outgoing Internal Inter-Cell Handovers(TCHF) (Excluding Directed Retry)(1800/1900-1800/1900)

H3127Y Failed Outgoing Internal Inter-Cell Handovers(TCHF) (Excluding Directed Retry)(900/850-1800/1900)

H3127Z Failed Outgoing Internal Inter-Cell Handovers(TCHF) (Excluding Directed Retry)(1800/1900-900/850)

H3128W Failed Outgoing Internal Inter-Cell Handovers(TCHH) (Excluding Directed Retry)(900/850-900/850)

H3128X Failed Outgoing Internal Inter-Cell Handovers(TCHH) (Excluding Directed Retry)(1800/1900-1800/1900)

H3128Y Failed Outgoing Internal Inter-Cell Handovers(TCHH) (Excluding Directed Retry)(900/850-1800/1900)

H3128Z Failed Outgoing Internal Inter-Cell Handovers(TCHH) (Excluding Directed Retry)(1800/1900-900/850)

H3121W Failed Outgoing Internal Inter-Cell Handovers(Directed Retry) (900/850-900/850)

H3121X Failed Outgoing Internal Inter-Cell Handovers(Directed Retry) (1800/1900-1800/1900)



1-47

Counter Description

H3121Y Failed Outgoing Internal Inter-Cell Handovers(Directed Retry) (900/850-1800/1900)

H3121Z Failed Outgoing Internal Inter-Cell Handovers(Directed Retry) (1800/1900-900/850)

H312A Failed Outgoing Internal Inter-Cell Handovers(No Channel Available)

H312B Failed Outgoing Internal Inter-Cell Handovers(Terrestrial Resource Request Failed)

H312G Failed Outgoing Internal Inter-Cell Handovers (AInterface Failure)

H3120C Failed Outgoing Internal Inter-Cell Handovers(Timer Expired) (SDCCH) (Excluding DirectedRetry)

H3127Cb Failed Outgoing Internal Inter-Cell Handovers(Timer Expired) (TCHF) (Signaling Channel)

H3128Cb Failed Outgoing Internal Inter-Cell Handovers(Timer Expired) (TCHH) (Signaling Channel)

H3127Ca Failed Outgoing Internal Inter-Cell Handovers(Timer Expired) (TCHF) (Traffic Channel)

H3128Ca Failed Outgoing Internal Inter-Cell Handovers(Timer Expired) (TCHH) (Traffic Channel)

H3121C Failed Outgoing Internal Inter-Cell Handovers(Timer Expired) (Directed Retry)

H312Da Failed Outgoing Internal Inter-Cell Handovers(Reconnection to Old Channels) (AbnormalRelease, Unspecified)

H312Db Failed Outgoing Internal Inter-Cell Handovers(Reconnection to Old Channels) (AbnormalRelease, Channel Unacceptable)

H312Dc Failed Outgoing Internal Inter-Cell Handovers(Reconnection to Old Channels) (AbnormalRelease, Timer Expired)

H312Dd Failed Outgoing Internal Inter-Cell Handovers(Reconnection to Old Channels) (AbnormalRelease, No Activity on the Radio Path)

H312De Failed Outgoing Internal Inter-Cell Handovers(Reconnection to Old Channels) (PreemptiveRelease)


Handover


Issue 02 (2008-06-30)

Counter Description

H312Df Failed Outgoing Internal Inter-Cell Handovers(Reconnection to Old Channels) (HandoverFailed, Timing Advance out of Range)

H312Dg Failed Outgoing Internal Inter-Cell Handovers(Reconnection to Old Channels) (Channel ModeUnavailable)

H312Dh Failed Outgoing Internal Inter-Cell Handovers(Reconnection to Old Channels) (FrequencyUnavailable)

H312Di Failed Outgoing Internal Inter-Cell Handovers(Reconnection to Old Channels) (Call AlreadyCleared)

H312Dj Failed Outgoing Internal Inter-Cell Handovers(Reconnection to Old Channels) (SemanticallyIncorrect Message)

H312Dk Failed Outgoing Internal Inter-Cell Handovers(Reconnection to Old Channels) (InvalidMandatory Information)

H312Dl Failed Outgoing Internal Inter-Cell Handovers(Reconnection to Old Channels) (Message TypeNon-existent or Not Implemented)

H312Dm Failed Outgoing Internal Inter-Cell Handovers(Reconnection to Old Channels) (Message TypeNot Compatible with Protocol State)

H312Dn Failed Outgoing Internal Inter-Cell Handovers(Reconnection to Old Channels) (Conditional IEError)

H312Do Failed Outgoing Internal Inter-Cell Handovers(Reconnection to Old Channels) (No CellAllocation Available)

H312Dp Failed Outgoing Internal Inter-Cell Handovers(Reconnection to Old Channels) (Protocol ErrorUnspecified)

H312Dq Failed Outgoing Internal Inter-Cell Handovers(Reconnection to Old Channels) (Other Causes)

H310A Outgoing Internal Inter-Cell Handover Requests(Uplink Quality)

H310B Outgoing Internal Inter-Cell Handover Requests(Downlink Quality)

H310C Outgoing Internal Inter-Cell Handover Requests(Uplink Strength)



1-49

Counter Description

H310D Outgoing Internal Inter-Cell Handover Requests(Downlink Strength)

H310E Outgoing Internal Inter-Cell Handover Requests(Timing Advance)

H310F Outgoing Internal Inter-Cell Handover Requests(Better Cell)

H310G Outgoing Internal Inter-Cell Handover Requests(Load)

H310H Outgoing Internal Inter-Cell Handover Requests(Rapid Level Drop)

H310I Outgoing Internal Inter-Cell Handover Requests(MSC Intervention)

H310J Outgoing Internal Inter-Cell Handover Requests(OM Intervention)

H310L Outgoing Internal Inter-Cell Handover Requests(Other Causes)

H311A Outgoing Internal Inter-Cell HandoverCommands (Uplink Quality)

H311B Outgoing Internal Inter-Cell HandoverCommands (Downlink Quality)

H311C Outgoing Internal Inter-Cell HandoverCommands (Uplink Strength)

H311D Outgoing Internal Inter-Cell HandoverCommands (Downlink Strength)

H311E Outgoing Internal Inter-Cell HandoverCommands (Timing Advance)

H311F Outgoing Internal Inter-Cell HandoverCommands (Better Cell)

H311G Outgoing Internal Inter-Cell HandoverCommands (Load)

H311H Outgoing Internal Inter-Cell HandoverCommands (Rapid Level Drop)

H311I Outgoing Internal Inter-Cell HandoverCommands (MSC Intervention)

H311J Outgoing Internal Inter-Cell HandoverCommands (OM Intervention)

H311L Outgoing Internal Inter-Cell HandoverCommands (Other Causes)


Handover


Issue 02 (2008-06-30)

Counter Description

H3122A Failed Outgoing Internal Inter-Cell Handovers(Uplink Quality)

H3122B Failed Outgoing Internal Inter-Cell Handovers(Downlink Quality)

H3122C Failed Outgoing Internal Inter-Cell Handovers(Uplink Strength)

H3122D Failed Outgoing Internal Inter-Cell Handovers(Downlink Strength)

H3122E Failed Outgoing Internal Inter-Cell Handovers(Timing Advance)

H3122F Failed Outgoing Internal Inter-Cell Handovers(Better Cell)

H3122G Failed Outgoing Internal Inter-Cell Handovers(Load)

H3122H Failed Outgoing Internal Inter-Cell Handovers(Rapid Level Drop)

H3122I Failed Outgoing Internal Inter-Cell Handovers(MSC Intervention)

H3122J Failed Outgoing Internal Inter-Cell Handovers(OM Intervention)

H3122L Failed Outgoing Internal Inter-Cell Handovers(Other Causes)

H3400W Incoming External Inter-Cell Handover Requests(SDCCH) (900/850-900/850)

H3400X Incoming External Inter-Cell Handover Requests(SDCCH) (1800/1900-1800/1900)

H3400Y Incoming External Inter-Cell Handover Requests(SDCCH) (900/850-1800/1900)

H3400Z Incoming External Inter-Cell Handover Requests(SDCCH) (1800/1900-900/850)

H3409W Incoming External Inter-Cell Handover Requests(TCH) (900/850-900/850)

H3409X Incoming External Inter-Cell Handover Requests(TCH) (1800/1900-1800/1900)

H3409Y Incoming External Inter-Cell Handover Requests(TCH) (900/850-1800/1900)

H3409Z Incoming External Inter-Cell Handover Requests(TCH) (1800/1900-900/850)



1-51

Counter Description

H3410W Incoming External Inter-Cell HandoverResponses (SDCCH) (900/850-900/850)

H3410X Incoming External Inter-Cell HandoverResponses (SDCCH) (1800/1900-1800/1900)

H3410Y Incoming External Inter-Cell HandoverResponses (SDCCH) (900/850-1800/1900)

H3410Z Incoming External Inter-Cell HandoverResponses (SDCCH) (1800/1900-900/850)

H3417W Incoming External Inter-Cell HandoverResponses (TCHF) (900/850-900/850)

H3417X Incoming External Inter-Cell HandoverResponses (TCHF) (1800/1900-1800/1900)

H3417Y Incoming External Inter-Cell HandoverResponses (TCHF) (900/850-1800/1900)

H3417Z Incoming External Inter-Cell HandoverResponses (TCHF) (1800/1900-900/850)

H3418W Incoming External Inter-Cell HandoverResponses (TCHH) (900/850-900/850)

H3418X Incoming External Inter-Cell HandoverResponses (TCHH) (1800/1900-1800/1900)

H3418Y Incoming External Inter-Cell HandoverResponses (TCHH) (900/850-1800/1900)

H3418Z Incoming External Inter-Cell HandoverResponses (TCHH) (1800/1900-900/850)

H3420W Failed Incoming External Inter-Cell Handovers(SDCCH) (900/850-900/850)

H3420X Failed Incoming External Inter-Cell Handovers(SDCCH) (1800/1900-1800/1900)

H3420Y Failed Incoming External Inter-Cell Handovers(SDCCH) (900/850-1800/1900)

H3420Z Failed Incoming External Inter-Cell Handovers(SDCCH) (1800/1900-900/850)

H3429W Failed Incoming External Inter-Cell Handovers(TCH) (900/850-900/850)

H3429X Failed Incoming External Inter-Cell Handovers(TCH) (1800/1900-1800/1900)

H3429Y Failed Incoming External Inter-Cell Handovers(TCH) (900/850-1800/1900)


Handover


Issue 02 (2008-06-30)

Counter Description

H3429Z Failed Incoming External Inter-Cell Handovers(TCH) (1800/1900-900/850)

H3401B Incoming External Inter-Cell Handover TCHRequests (TCHF Only)

H3401C Incoming External Inter-Cell Handover TCHRequests (TCHH Only)

H3401D Incoming External Inter-Cell Handover TCHRequests (TCHF Preferred,Channel TypeUnchangeable)

H3401E Incoming External Inter-Cell Handover TCHRequests (TCHH Preferred, Channel TypeUnchangeable)

H3401G Incoming External Inter-Cell Handover TCHRequests (TCHF Preferred, Channel TypeChangeable)

H3401H Incoming External Inter-Cell Handover TCHRequests (TCHH Preferred, Channel TypeChangeable)

H3401F Incoming External Inter-Cell Handover TCHRequests (TCHF or TCHH, Channel TypeUnchangeable)

H3401I Incoming External Inter-Cell Handover TCHRequests (TCHF or TCHH, Channel TypeChangeable)

H342I Failed Incoming External Inter-Cell Handovers(Invalid Message)

H3420A Failed Incoming External Inter-Cell Handovers(No Channel Available) (SDCCH)

H3429A Failed Incoming External Inter-Cell Handovers(No Channel Available) (TCH)

H342E Failed Incoming External Inter-Cell Handovers(CIC Unavailable)

H342F Failed Incoming External Inter-Cell Handovers(CIC Allocated)

H342B Failed Incoming External Inter-Cell Handovers(Terrestrial Resource Request Failed)

H342H Failed Incoming External Inter-Cell Handovers(Clear Commands Sent By MSC)



1-53

Counter Description

H3420C Failed Incoming External Inter-Cell Handovers(Timer Expired) (SDCCH)

H3429Cb Failed Incoming External Inter-Cell Handovers(Timer Expired) (TCH) (Signaling Channel)

H3429Ca Failed Incoming External Inter-Cell Handovers(Timer Expired) (TCH) (Traffic Channel)

H3440 Incoming External Inter-Cell HandoverDetection Messages Received by BSC (SDCCH)

H3447 Incoming External Inter-Cell HandoverDetection Messages Received by BSC (TCHF)

H3448 Incoming External Inter-Cell HandoverDetection Messages Received by BSC (TCHH)

H3300W Outgoing External Inter-Cell Handover Requests(SDCCH) (Excluding Directed Retry)(900/850-900/850)

H3300X Outgoing External Inter-Cell Handover Requests(SDCCH) (Excluding Directed Retry)(1800/1900-1800/1900)

H3300Y Outgoing External Inter-Cell Handover Requests(SDCCH) (Excluding Directed Retry)(900/850-1800/1900)

H3300Z Outgoing External Inter-Cell Handover Requests(SDCCH) (Excluding Directed Retry)(1800/1900-900/850)

H3310W Outgoing External Inter-Cell HandoverCommands (SDCCH) (Excluding Directed Retry)(900/850-900/850)

H3310X Outgoing External Inter-Cell HandoverCommands (SDCCH) (Excluding Directed Retry)(1800/1900-1800/1900)

H3310Y Outgoing External Inter-Cell HandoverCommands (SDCCH) (Excluding Directed Retry)(900/850-1800/1900)

H3310Z Outgoing External Inter-Cell HandoverCommands (SDCCH) (Excluding Directed Retry)(1800/1900-900/850)

H3317W Outgoing External Inter-Cell HandoverCommands (TCHF) (Excluding Directed Retry)(900/850-900/850)


Handover


Issue 02 (2008-06-30)

Counter Description

H3317X Outgoing External Inter-Cell HandoverCommands (TCHF) (Excluding Directed Retry)(1800/1900-1800/1900)

H3317Y Outgoing External Inter-Cell HandoverCommands (TCHF) (Excluding Directed Retry)(900/850-1800/1900)

H3317Z Outgoing External Inter-Cell HandoverCommands (TCHF) (Excluding Directed Retry)(1800/1900-900/850)

H3318W Outgoing External Inter-Cell HandoverCommands (TCHH) (Excluding Directed Retry)(900/850-900/850)

H3318X Outgoing External Inter-Cell HandoverCommands (TCHH) (Excluding Directed Retry)(1800/1900-1800/1900)

H3318Y Outgoing External Inter-Cell HandoverCommands (TCHH) (Excluding Directed Retry)(900/850-1800/1900)

H3318Z Outgoing External Inter-Cell HandoverCommands (TCHH) (Excluding Directed Retry)(1800/1900-900/850)

H3311W Outgoing External Inter-Cell HandoverCommands(Directed Retry) (900/850-900/850)

H3311X Outgoing External Inter-Cell HandoverCommands (Directed Retry)(1800/1900-1800/1900)

H3311Y Outgoing External Inter-Cell HandoverCommands (Directed Retry) (900/850-1800/1900)

H3311Z Outgoing External Inter-Cell HandoverCommands(Directed Retry) (1800/1900-900/850)

H3320W Failed Outgoing External Inter-Cell Handovers(SDCCH) (900/850-900/850)

H3320X Failed Outgoing External Inter-Cell Handovers(SDCCH) (1800/1900-1800/1900)

H3320Y Failed Outgoing External Inter-Cell Handovers(SDCCH) (900/850-1800/1900)

H3320Z Failed Outgoing External Inter-Cell Handovers(SDCCH) (1800/1900-900/850)

H3327W Failed Outgoing External Inter-Cell Handovers(TCHF) (900/850-900/850)



1-55

Counter Description

H3327X Failed Outgoing External Inter-Cell Handovers(TCHF) (1800/1900-1800/1900)

H3327Y Failed Outgoing External Inter-Cell Handovers(TCHF) (900/850-1800/1900)

H3327Z Failed Outgoing External Inter-Cell Handovers(TCHF) (1800/1900-900/850)

H3328W Failed Outgoing External Inter-Cell Handovers(TCHH) (900/850-900/850)

H3328X Failed Outgoing External Inter-Cell Handovers(TCHH) (1800/1900-1800/1900)

H3328Y Failed Outgoing External Inter-Cell Handovers(TCHH) (900/850-1800/1900)

H3328Z Failed Outgoing External Inter-Cell Handovers(TCHH) (1800/1900-900/850)

H3321W Failed Outgoing External Inter-Cell Handovers(Directed Retry) (900/850-900/850)

H3321X Failed Outgoing External Inter-Cell Handovers(Directed Retry) (1800/1900-1800/1900)

H3321Y Failed Outgoing External Inter-Cell Handovers(Directed Retry) (900/850-1800/1900)

H3321Z Failed Outgoing External Inter-Cell Handovers(Directed Retry) (1800/1900-900/850)

H330A Outgoing External Inter-Cell Handover Requests(Uplink Quality)

H330B Outgoing External Inter-Cell Handover Requests(Downlink Quality)

H330C Outgoing External Inter-Cell Handover Requests(Uplink Strength)

H330D Outgoing External Inter-Cell Handover Requests(Downlink Strength)

H330E Outgoing External Inter-Cell Handover Requests(Timing Advance)

H330F Outgoing External Inter-Cell Handover Requests(Better Cell)

H330G Outgoing External Inter-Cell Handover Requests(Load)

H330H Outgoing External Inter-Cell Handover Requests(Rapid Level Drop)


Handover


Issue 02 (2008-06-30)

Counter Description

H330I Outgoing External Inter-Cell Handover Requests(MSC Intervention)

H330J Outgoing External Inter-Cell Handover Requests(OM Intervention)

H330L Outgoing External Inter-Cell Handover Requests(Other Causes)

H331A Outgoing External Inter-Cell HandoverCommands (Uplink Quality)

H331B Outgoing External Inter-Cell HandoverCommands (Downlink Quality)

H331C Outgoing External Inter-Cell HandoverCommands (Uplink Strength)

H331D Outgoing External Inter-Cell HandoverCommands (Downlink Strength)

H331E Outgoing External Inter-Cell HandoverCommands (Timing Advance)

H331F Outgoing External Inter-Cell HandoverCommands (Better Cell)

H331G Outgoing External Inter-Cell HandoverCommands (Load)

H331H Outgoing External Inter-Cell HandoverCommands (Rapid Level Drop)

H331I Outgoing External Inter-Cell HandoverCommands (MSC Intervention)

H331J Outgoing External Inter-Cell HandoverCommands (OM Intervention)

H331L Outgoing External Inter-Cell HandoverCommands (Other Causes)

H3322A Failed Outgoing External Inter-Cell Handovers(Uplink Quality)

H3322B Failed Outgoing External Inter-Cell Handovers(Downlink Quality)

H3322C Failed Outgoing External Inter-Cell Handovers(Uplink Strength)

H3322D Failed Outgoing External Inter-Cell Handovers(Downlink Strength)

H3322E Failed Outgoing External Inter-Cell Handovers(Timing Advance)



1-57

Counter Description

H3322F Failed Outgoing External Inter-Cell Handovers(Better Cell)

H3322G Failed Outgoing External Inter-Cell Handovers(Load)

H3322H Failed Outgoing External Inter-Cell Handovers(Rapid Level Drop)

H3322I Failed Outgoing External Inter-Cell Handovers(MSC Intervention)

H3322J Failed Outgoing External Inter-Cell Handovers(OM Intervention)

H3322L Failed Outgoing External Inter-Cell Handovers(Other Causes)

H332Ka Failed Outgoing External Inter-Cell Handovers(Handover Request Rejected) (OM Intervention)

H332Kb Failed Outgoing External Inter-Cell Handovers(Handover Request Rejected) (EquipmentFailure)

H332Kc Failed Outgoing External Inter-Cell Handovers(Handover Request Rejected) (No RadioResource Available)

H332Kd Failed Outgoing External Inter-Cell Handovers(Handover Request Rejected) (RequestedTerrestrial Resource Unavailable)

H332Ke Failed Outgoing External Inter-Cell Handovers(Handover Request Rejected) (BSS not Equipped)

H332Kf Failed Outgoing External Inter-Cell Handovers(Handover Request Rejected) (Invalid Cell)

H332Kg Failed Outgoing External Inter-Cell Handovers(Handover Request Rejected) (RequestedTranscoding/Rate Adaption Unavailable)

H332Kh Failed Outgoing External Inter-Cell Handovers(Handover Request Rejected) (Circuit PoolMismatch)

H332Ki Failed Outgoing External Inter-Cell Handovers(Handover Request Rejected) (Requested SpeechVersion Unavailable)

H332Kj Failed Outgoing External Inter-Cell Handovers(Handover Request Rejected) (CipheringAlgorithm not Supported)


Handover


Issue 02 (2008-06-30)

Counter Description

H332Kk Failed Outgoing External Inter-Cell Handovers(Handover Request Rejected) (Terrestrial circuitalready allocated)

H332Kl Failed Outgoing External Inter-Cell Handovers(Handover Request Rejected) (Invalid Message)

H332Km Failed Outgoing External Inter-Cell Handovers(Handover Request Rejected) (Protocol Errorbetween BSS and MSC)

H332Kn Failed Outgoing External Inter-Cell Handovers(Handover Request Rejected) (Other Causes)

H332Da Failed Outgoing External Inter-Cell Handovers(Reconnection to Old Channels) (AbnormalRelease, Unspecified)

H332Db Failed Outgoing External Inter-Cell Handovers(Reconnection to Old Channels) (AbnormalRelease, Channel Unacceptable)

H332Dc Failed Outgoing External Inter-Cell Handovers(Reconnection to Old Channels) (AbnormalRelease, Timer Expired)

H332Dd Failed Outgoing External Inter-Cell Handovers(Reconnection to Old Channels) (AbnormalRelease, No Activity on the Radio Path)

H332De Failed Outgoing External Inter-Cell Handovers(Reconnection to Old Channels) (PreemptiveRelease)

H332Df Failed Outgoing External Inter-Cell Handovers(Reconnection to Old Channels) (HandoverFailed, Timing Advance out of Range)

H332Dg Failed Outgoing External Inter-Cell Handovers(Reconnection to Old Channels) (Channel ModeUnavailable)

H332Dh Failed Outgoing External Inter-Cell Handovers(Reconnection to Old Channels) (FrequencyUnavailable)

H332Di Failed Outgoing External Inter-Cell Handovers(Reconnection to Old Channels) (Call AlreadyCleared)

H332Dj Failed Outgoing External Inter-Cell Handovers(Reconnection to Old Channels) (SemanticallyIncorrect Message)



1-59

Counter Description

H332Dk Failed Outgoing External Inter-Cell Handovers(Reconnection to Old Channels) (InvalidMandatory Information)

H332Dl Failed Outgoing External Inter-Cell Handovers(Reconnection to Old Channels) (Message TypeNon-existent or Not Implemented)

H332Dm Failed Outgoing External Inter-Cell Handovers(Reconnection to Old Channels) (Message TypeNot Compatible with Protocol State)

H332Dn Failed Outgoing External Inter-Cell Handovers(Reconnection to Old Channels) (Conditional IEError)

H332Do Failed Outgoing External Inter-Cell Handovers(Reconnection to Old Channels) (No CellAllocation Available)

H332Dp Failed Outgoing External Inter-Cell Handovers(Reconnection to Old Channels) (Protocol ErrorUnspecified)

H332Dq Failed Outgoing External Inter-Cell Handovers(Reconnection to Old Channels) (Other Causes)

H332Ha Failed Outgoing External Inter-Cell Handovers(Clear Commands Sent By MSC) (Radio InterfaceMessage Failure)

H332Hb Failed Outgoing External Inter-Cell Handovers(Clear Commands Sent By MSC) (Radio InterfaceFailure)

H332Hc Failed Outgoing External Inter-Cell Handovers(Clear Commands Sent By MSC) (OMIntervention)

H332Hd Failed Outgoing External Inter-Cell Handovers(Clear Commands Sent By MSC) (EquipmentFailure)

H332He Failed Outgoing External Inter-Cell Handovers(Clear Commands Sent By MSC) (Preemption)

H332Hf Failed Outgoing External Inter-Cell Handovers(Clear Commands Sent By MSC) (InvalidMessage)

H332Hg Failed Outgoing External Inter-Cell Handovers(Clear Commands Sent By MSC) (Protocol Errorbetween BSS and MSC)


Handover


Issue 02 (2008-06-30)

Counter Description

H332Hh Failed Outgoing External Inter-Cell Handovers(Clear Commands Sent By MSC) (Other Causes)

H332G Failed Outgoing External Inter-Cell Handovers(A Interface Failure)

H3320L Failed Outgoing External Inter-Cell Handovers(T7 Expiry) (SDCCH)

H3327Lb Failed Outgoing External Inter-Cell Handovers(T7 Expiry) (TCHF) (Signaling Channel)

H3328Lb Failed Outgoing External Inter-Cell Handovers(T7 Expiry) (TCHH) (Signaling Channel)

H3327La Failed Outgoing External Inter-Cell Handovers(T7 Expired) (TCHF) (Traffic Channel)

H3328La Failed Outgoing External Inter-Cell Handovers(T7 Expired) (TCHH) (Traffic Channel)

H3321L Failed Outgoing External Inter-Cell Handovers(T7 Expired) (Directed Retry)

H3320C Failed Outgoing External Inter-Cell Handovers(T8 Expiry) (SDCCH) (Excluding Directed Retry)

H3327Cb Failed Outgoing External Inter-Cell Handovers(T8 Expiry) (TCHF) (Signaling Channel)

H3328Cb Failed Outgoing External Inter-Cell Handovers(T8 Expiry) (TCHH) (Signaling Channel)

H3327Ca Failed Outgoing External Inter-Cell Handovers(T8 Expired) (TCHF) (Traffic Channel)

H3328Ca Failed Outgoing External Inter-Cell Handovers(T8 Expired) (TCHH) (Traffic Channel)

H3321C Failed Outgoing External Inter-Cell Handovers(T8 Expired) (Directed Retry)

H3303 Outgoing External Inter-Cell Handover Requests(Different Signaling Points)

H3313 Outgoing External Inter-Cell HandoverCommands (Different Signaling Points)

H3323 Failed Outgoing External Inter-Cell Handovers(Different Signaling Points)

H3307W Outgoing External Inter-Cell Handover Requests(TCHF) (Excluding Directed Retry)(900/850-900/850)



1-61

Counter Description

H3307X Outgoing External Inter-Cell Handover Requests(TCHF) (Excluding Directed Retry)(1800/1900-1800/1900)

H3307Y Outgoing External Inter-Cell Handover Requests(TCHF) (Excluding Directed Retry)(900/850-1800/1900)

H3307Z Outgoing External Inter-Cell Handover Requests(TCHF) (Excluding Directed Retry)(1800/1900-900/850)

H3308W Outgoing External Inter-Cell Handover Requests(TCHH) (Excluding Directed Retry)(900/850-900/850)

H3308X Outgoing External Inter-Cell Handover Requests(TCHH) (Excluding Directed Retry)(1800/1900-1800/1900)

H3308Y Outgoing External Inter-Cell Handover Requests(TCHH) (Excluding Directed Retry)(900/850-1800/1900)

H3308Z Outgoing External Inter-Cell Handover Requests(TCHH) (Excluding Directed Retry)(1800/1900-900/850)

H3301W Outgoing External Inter-Cell Handover Requests(Directed Retry) (900/850-900/850)

H3301X Outgoing External Inter-Cell Handover Requests(Directed Retry) (1800/1900-1800/1900)

H3301Y Outgoing External Inter-Cell Handover Requests(Directed Retry) (900/850-1800/1900)

H3301Z Outgoing External Inter-Cell Handover Requests(Directed Retry) (1800/1900-900/850)

H380 Cell Incoming Handover Requests

H382A Failed Cell Incoming Handovers (Congestion)

H382M Failed Cell Incoming Handovers (Other Causes)

H371A Cell Outgoing Handover Commands (UplinkQuality)

H371B Cell Outgoing Handover Commands (DownlinkQuality)

H371C Cell Outgoing Handover Commands (UplinkStrength)


Handover


Issue 02 (2008-06-30)

Counter Description

H371D Cell Outgoing Handover Commands (DownlinkStrength)

H371E Cell Outgoing Handover Commands (TimingAdvance)

H371F Cell Outgoing Handover Commands (Better Cell)

H371G Cell Outgoing Handover Commands (Load)

H371H Cell Outgoing Handover Commands (RapidLevel Drop)

H371I Cell Outgoing Handover Commands (MSCIntervention)

H371J Cell Outgoing Handover Commands (OMIntervention)

H371L Cell Outgoing Handover Commands (OtherCauses)

H372A Failed Cell Outgoing Handovers (Uplink Quality)

H372B Failed Cell Outgoing Handovers (DownlinkQuality)

H372C Failed Cell Outgoing Handovers (UplinkStrength)

H372D Failed Cell Outgoing Handovers (DownlinkStrength)

H372E Failed Cell Outgoing Handovers (TimingAdvance)

H372F Failed Cell Outgoing Handovers (Better Cell)

H372G Failed Cell Outgoing Handovers (Load)

H372H Failed Cell Outgoing Handovers (Rapid LevelDrop)

H372I Failed Cell Outgoing Handovers (MSCIntervention)

H372J Failed Cell Outgoing Handovers (OMIntervention)

H372L Failed Cell Outgoing Handovers (Other Causes)

S3300C Number of MRs during Handover Initiation(Uplink Receive Level Rank = 0)




1-63

Counter Description







S3310C Number of MRs during Handover Initiation(Uplink Receive Quality Rank = 0)








AS330C Mean Uplink Receiving Level during HandoverInitiation

AS331C Mean Uplink Receive Quality during HandoverInitiation

AS330A Mean Uplink Receive Level during ConcentricCell Handover Initiation (Overlay to Underlay)

AS332A Mean Downlink Receive Level during ConcentricCell Handover Initiation (Overlay to Underlay)

AS330B Mean Uplink Receive Level during ConcentricCell Handover Initiation (Underlay to Overlay)


Handover


Issue 02 (2008-06-30)

Counter Description

AS332B Mean Downlink Receive Level during ConcentricCell Handover Initiation (Underlay to Overlay)

AS334A Mean Timing Advance during Concentric CellHandover Initiation (Overlay to Underlay)

AS334B Mean Timing Advance during Concentric CellHandover Initiation (Underlay to Overlay)

1.6 ReferencesThe references indicate the documents about handover from the related standard organizations.

The references are as follows:

l GSM 08.58

l GSM 04.08



1-65

01 07 handover

Documents

huawei proprietary

huawei trademarks

huawei industrial basebantian

ltdinternalhuawei technologies

ltdcontents1 handover

handover preprocessing

handover decision algorithm

noticethe information