common clock(sran9.0_draft a)

SingleRAN

Common Clock Feature ParameterDescription

Issue Draft ADate 2014-01-20

HUAWEI TECHNOLOGIES CO., LTD.

Copyright Huawei Technologies Co., Ltd. 2014. All rights reserved.No part of this document may be reproduced or transmitted in any form or by any means without prior writtenconsent of Huawei Technologies Co., Ltd. Trademarks and Permissions

and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.All other trademarks and trade names mentioned in this document are the property of their respective holders. NoticeThe purchased products, services and features are stipulated by the contract made between Huawei and thecustomer. All or part of the products, services and features described in this document may not be within thepurchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information,and recommendations in this document are provided "AS IS" without warranties, guarantees or representationsof any kind, either express or implied.

The information in this document is subject to change without notice. Every effort has been made in thepreparation of this document to ensure accuracy of the contents, but all statements, information, andrecommendations in this document do not constitute a warranty of any kind, express or implied. Huawei Technologies Co., Ltd.Address: Huawei Industrial Base

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Website: http://www.huawei.comEmail: [email protected]

Issue Draft A (2014-01-20) Huawei Proprietary and ConfidentialCopyright Huawei Technologies Co., Ltd.

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Contents

1 About This Document..................................................................................................................11.1 Scope..............................................................................................................................................................................11.2 Intended Audience..........................................................................................................................................................21.3 Change History...............................................................................................................................................................22 Overview.........................................................................................................................................33 Common GPS Reference Clock..................................................................................................53.1 Common GPS Reference Clock in Separate-MPT Multimode Base Stations...............................................................63.2 Common GPS Reference Clock in Co-MPT Multimode Base Stations........................................................................73.3 Common GPS Reference Clock in Hybrid-MPT Multimode Base Stations..................................................................74 Common BITS Reference Clock...............................................................................................114.1 Common BITS Reference Clock in Separate-MPT Multimode Base Stations............................................................124.2 Common BITS Reference Clock in Co-MPT Multimode Base Stations.....................................................................134.3 Common BITS Reference Clock in Hybrid-MPT Multimode Base Stations..............................................................135 Common E1/T1 Reference Clock..............................................................................................165.1 Common E1/T1 Reference Clock in Separate-MPT Multimode Base Stations...........................................................175.2 Common E1/T1 Reference Clock in Co-MPT Multimode Base Stations....................................................................185.3 Common E1/T1 Reference Clock in Hybrid-MPT Multimode Base Stations.............................................................196 Common IEEE 1588v2 Reference Clock..................................................................................236.1 Common IEEE 1588v2 Reference Clock in Separate-MPT Multimode Base Stations...............................................256.2 Common IEEE 1588v2 Reference Clock in Co-MPT Multimode Base Stations........................................................276.3 Common IEEE 1588v2 Reference Clock in Hybrid-MPT Multimode Base Stations.................................................277 Common Synchronous Ethernet Reference Clock................................................................317.1 Common Synchronous Ethernet Reference Clock in Separate-MPT Multimode Base Stations.................................337.2 Common Synchronous Ethernet Reference Clock in Co-MPT Multimode Base Stations..........................................357.3 Common Synchronous Ethernet Reference Clock in Hybrid-MPT Multimode Base Stations....................................358 Other Common Reference Clocks............................................................................................398.1 Common 1PPS+TOD Reference Clock in Co-MPT GSM/UMTS/LTE Triple-mode Base Stations..........................408.2 Common IEEE 1588v2+SyncE Reference Clock in Co-MPT GSM/UMTS/LTE Triple-mode Base Stations...........409 Engineering Guidelines.............................................................................................................42

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9.1 When to Use Common Clock.......................................................................................................................................429.2 Required Information...................................................................................................................................................429.3 Requirements................................................................................................................................................................429.4 Initial Configuration.....................................................................................................................................................449.4.1 GBTS/eGBTS Providing Clock Source for NodeB/eNodeB/Co-MPT Base Station................................................449.4.2 NodeB Providing Clock Source for GBTS/eGBTS/eNodeB/Co-MPT Base Station................................................519.4.3 The eNodeB Providing Clock Source for GBTS/eGBTS/NodeB/Co-MPT Base Station.........................................559.4.4 Co-MPT Base Station Providing Clock Source for GBTS/eGBTS/NodeB/eNodeB................................................609.4.5 Co-MPT Base Station Supporting Common Reference Clock among GSM, UMTS, and LTE...............................659.5 Activation Observation.................................................................................................................................................689.6 Troubleshooting............................................................................................................................................................6910 Parameters...................................................................................................................................7011 Counters......................................................................................................................................8512 Glossary.......................................................................................................................................8613 Reference Documents...............................................................................................................87

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1 About This Document1.1 Scope

This document describes the Common Clock feature, which applies to the scenario in whichbaseband unit (BBU) sharing is implemented on a multimode base station. Common clocks inmultimode base stations can be classified into:l GSM/UMTS common clockl GSM/LTE common clockl UMTS/LTE common clockl GSM/UMTS/LTE common clockWith BBU sharing, boards of different modes are installed in one BBU. BBU sharing can beimplemented on one BBU or two interconnected BBUs.For details about clock configuration of a single-mode base station, see Synchronization FeatureParameter Description for this mode.The Common Clock feature involves the followingfeatures:l MRFD-211601 Multi-mode BS Common Reference Clock(GBTS/eGBTS)l MRFD-221601 Multi-mode BS Common Reference Clock(NodeB)l MRFD-231601 Multi-mode BS Common Reference Clock (eNodeB)l MRFD-241601 Multi-mode BS Common Reference Clock(LTE TDD)

NOTE

l BTS, NodeB, and eNodeB correspond to the GSM, UMTS, and LTE modes of a multimode base station,respectively.

l Before reading this document, familiarize yourself with Synchronization Feature ParameterDescription for each mode, including eRAN, RAN, and GBSS.

l MRFD-231601 Multi-mode BS Common Reference Clock (eNodeB) is an LTE FDD feature andMRFD-241601 Multi-mode BS Common Reference Clock(LTE TDD) is an LTE TDD feature.Unlessotherwise specified, the LTE mode and eNodeB mentioned in this document do not differentiatebetween FDD and TDD.

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1.2 Intended AudienceThis document is intended for personnel who:l Need to understand the features described hereinl Work with Huawei products

1.3 Change HistoryThis section provides information about the changes in different document versions. There aretwo types of changes, which are defined as follows:l Feature change

Changes in features of a specific product versionl Editorial change

Changes in wording or addition of information that was not described in the earlier version

Draft A (2014-01-20)Compared with Issue 01 (2013-04-28) of SRAN8.0, Draft A (2014-01-20) of SRAN9.0 includesthe following changes.

Change Type Change Description ParameterChange

Feature change Added common clocks for the LTE TDD mode.Added the description of BBU interconnection,For details, see 2 Overview.Huawei mobile network management systemM2000 is renamed U2000.

None

Editorial change Split "Common GPS/BITS Reference Clock" intotwo sections: " Common GPS Reference Clock "and " Common BITS Reference Clock".

None

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2 OverviewWith the Common Clock feature, all modes of a multimode base station share a clock sourceand require only one set of clock equipment.The Common Clock feature applies to GSM/UMTS, GSM/LTE, or UMTS/LTE dual-mode andGSM/UMTS/LTE triple-mode base stations where the BBU Interconnection feature is applied.The Common Clock feature helps reduce operating expense (OPEX) and capital expenditure(CAPEX).A multimode base station can be configured with the following common reference clocks:l GPS reference clockl Building integrated timing supply (BITS) reference clockl E1/T1 reference clockl IEEE 1588v2 reference clockl Synchronous Ethernet reference clockl 1PPS+TOD reference clockThese reference clocks are described in the following chapters.Application scenarios of the Common Clock feature include:l Separate-MPT scenario: Separate-MPT main controls boards are used in GSM, UMTS,

and LTE modes.If all modes in a multimode base station are configured in the same BBU, all modesexchange data by using the BBU backplane and share a clock source. If the modes of amultimode base station are configured in two different BBUs, the BBU Interconnectionfeature must be enabled.The following restrictions apply to this scenario: A multimode base station does not support the AUTO(Auto Handover) clock working

mode. Each mode in a multimode base station can be configured with only one clocksource. A multimode base station can be configured with only one USCU board and the USCU

board can be configured with only one clock source. If the LTE TDD mode is used in a multimode base station, the shared clock source must

support and use time synchronization.

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In the inter-subrack SDR scenario, it is not allowed to configure frequencysynchronization for the mode in the primary BBU and time synchronization for themode in the secondary BBU at the same time.

l Co-MPT scenario: The GBTS/eGBTS, NodeB, and eNodeB share a UMPT board.The UMPT board provides the clock source for each mode and supports the Common Clockfeature. The clock source provided by the UMPT board supports frequency synchronizationand time synchronization. If the LTE TDD mode is used, the clock source of the UMPTboard must support and use time synchronization.

NOTE

l The UMPT board can be configured for a single-mode base station. UMPT_G, UMPT_U, andUMPT_L represent the UMPT board configured for GSM, UMTS, and LTE single-mode base stations,respectively.

l The UMPT board can be configured for a dual-mode or triple-mode base station. UMPT_GU,UMPT_GL, UMPT_UL, and UMPT_GUL represent the UMPT board configured for GSM/UMTS,GSM/LTE, UMTS/LTE, and GSM/UMTS/LTE multimode base stations, respectively.

l In an LTE FDD and LTE TDD dual-mode base station, LTE FDD and LTE TDD support only co-MPT.

l Hybrid-MPT scenario: Separate-MPT and co-MPT scenarios coexist.In this scenario, single-mode base stations are configured with separate-MPT main controlboards, and multimode base stations are configured with co-MPT main control boards. The main control board shared by different modes supports the Common Clock feature.

The clock source provided by the main control board supports frequencysynchronization and time synchronization. If the LTE TDD mode is used, the clocksource of the co-MPT main control board must support and use time synchronization. The modes that use separate-MPT main control boards and the modes that use co-MPT

main control boards share a clock source. The restrictions in this scenario are the sameas those in the separate-MPT scenario.NOTE

To achieve BBU interconnection, you can connect one UCIU board and one UMPT board or connecttwo UMPT boards. The two methods use the same configurations. In this document, BBUinterconnection is achieved by connecting one UCIU board and one UMPT board.

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3 Common GPS Reference ClockThis chapter describes the common GPS reference clock in separate-MPT, co-MPT, and hybrid-MPT multimode base stations.

NOTE

In this chapter, the UMPT board is in LTE TDD mode and configured with a GPS satellite card, such asUMPT_L, UMPT_UL, UMPT_GL, and UMPT_GUL.

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3.1 Common GPS Reference Clock in Separate-MPTMultimode Base Stations

The USCU board in a dual-mode base station receives GPS clock signals and forwards them tothe two main control boards in the base station through the backplane. Alternatively, the LMPT/UMPT_L board receives GPS clock signals and forwards them to another mode through thebackplane. Figure 3-1, Figure 3-2, and Figure 3-3 show a common GPS reference clock in aseparate-MPT dual-mode base station.

Figure 3-1 A common GPS reference clock in a separate-MPT GSM/UMTS dual-mode basestation

Figure 3-2 A common GPS reference clock in a separate-MPT GSM/LTE dual-mode basestation



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Figure 3-3 A common GPS reference clock in a separate-MPT UMTS/LTE dual-mode basestation

3.2 Common GPS Reference Clock in Co-MPT MultimodeBase Stations

As shown in Figure 3-4, GSM/UMTS, GSM/LTE, UMTS/LTE, or GSM/UMTS/LTEmultimode base stations are configured in co-MPT mode and share a GPS clock source.

Figure 3-4 A common GPS reference clock in a co-MPT multimode base station

3.3 Common GPS Reference Clock in Hybrid-MPTMultimode Base Stations

As shown in Figure 3-5, only one BBU is used. The USCU board receives GPS clock signalsand forwards them to the main control boards in the multimode base station through thebackplane. Alternatively, the LMPT, UMPT_L, UMPT_GL, or UMPT_UL board receives GPS



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clock signals and forwards them to another main control board through the backplane. Thisallows different modes of a base station to share a GPS reference clock.

Figure 3-5 A common GPS reference clock in a hybrid-MPT triple-mode base station

When BBU Interconnection is enabled, the GPS reference clock is shared as follows:



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l As shown in Figure 3-6, the GPS interface is located in the primary BBU of a GSM/UMTS/LTE triple-mode base station. The USCU board receives GPS clock signals and forwardsthem to the GTMU and UMPT_L boards through the backplane. Alternatively, the LMPTor UMPT_L board receives GPS clock signals and forwards them to the GTMU boardthrough the backplane. Upon receiving the clock signals, the GTMU board forwards themto the UCIU board. This UCIU board then sends the clock signals to the UMPT_U boardin the secondary BBU, which receives them through its BBU interconnection port.

l As shown in Figure 3-7, the GPS interface is located in the secondary BBU of a GSM/UMTS/LTE triple-mode base station. The USCU board receives GPS clock signals andforwards them to the UMPT_L board through the backplane, which in turn sends themthrough its BBU interconnection port to the UCIU board in the primary BBU. Alternatively,the LMPT/UMPT_L board receives GPS clock signals and sends them through its BBUinterconnection port to the UCIU board in the primary BBU. This UCIU board then sendsthe clock signals to the GTMU and WMPT/UMPT_U boards through the backplane.

Figure 3-6 A common GPS reference clock in the primary BBU of a GSM/UMTS/LTEtriple-mode base station



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Figure 3-7 A common GPS reference clock in the secondary BBU of a GSM/UMTS/LTE triple-mode base station



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4 Common BITS Reference ClockThis chapter describes the common BITS reference clock in separate-MPT, co-MPT, and hybrid-MPT multimode base stations. The BITS reference clock only supports frequencysynchronization, and does not support time synchronization. The LTE mode and eNodeBmentioned in this chapter refer to FDD.

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4.1 Common BITS Reference Clock in Separate-MPTMultimode Base Stations

As shown in Figure 4-1, Figure 4-2, and Figure 4-3, the USCU board in a dual-mode basestation receives BITS clock signals and forwards them to the two main control boards in thebase station.

Figure 4-1 A common BITS reference clock in a separate-MPT GSM/UMTS dual-mode basestation

Figure 4-2 A common BITS reference clock in a separate-MPT GSM/LTE dual-mode basestation



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Figure 4-3 A common BITS reference clock in a separate-MPT UMTS/LTE dual-mode basestation

4.2 Common BITS Reference Clock in Co-MPT MultimodeBase Stations

As shown in Figure 4-4, GSM/UMTS, GSM/LTE, UMTS/LTE, or GSM/UMTS/LTEmultimode base stations are configured in co-MPT mode and share a BITS reference clock.

Figure 4-4 A common BITS reference clock in a co-MPT multimode base station

4.3 Common BITS Reference Clock in Hybrid-MPTMultimode Base Stations

As shown in Figure 4-5, only one BBU is used. The USCU board receives BITS clock signalsand forwards them to the main control boards in the multimode base station. This allows differentmodes of a base station to share a BITS reference clock.



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Figure 4-5 A common BITS reference clock in a hybrid-MPT triple-mode base station

When BBU Interconnection is enabled, the BITS reference clock is shared as follows:l As shown in Figure 4-6, the USCU board is installed in the primary BBU of a GSM/UMTS/

LTE triple-mode base station. The USCU board receives BITS clock signals and forwardsthem to the GTMU and LMPT/UMPT_L boards. Upon receiving the clock signals, theGTMU board forwards them to the UCIU board. The UCIU board then sends the clocksignals to the UMPT_U board in the secondary BBU, which receives them through its BBUinterconnection port.

l As shown in Figure 4-7, the USCU board is installed in the secondary BBU of a GSM/UMTS/LTE triple-mode base station. The USCU board receives BITS clock signals andforwards them to the UMPT_U board, which in turn sends them through its BBUinterconnection port to the UCIU board in the primary BBU. The UCIU board then sendsthe clock signals to the GTMU and LMPT/UMPT_L boards through the backplane.



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Figure 4-6 A common BITS reference clock in the primary BBU of a GSM/UMTS/LTEtriple-mode base station

Figure 4-7 A common BITS reference clock in the secondary BBU of a GSM/UMTS/LTEtriple-mode base station



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5 Common E1/T1 Reference ClockThis chapter describes the common E1/T1 reference clock in separate-MPT, co-MPT, andhybrid-MPT multimode base stations. The E1/T1 reference clock only supports frequencysynchronization, and does not support time synchronization. The LTE mode and eNodeBmentioned in this chapter refer to FDD.Table 5-1 describes the typical application scenarios for a common E1/T1 reference clock.

Table 5-1 Typical application scenarios for a common E1/T1 reference clockDeployment Scenario

Description

Common E1/T1 referenceclock overthe Abisinterface

When the Abis interface uses E1/T1 transmission and the Iub or S1 interfaceuses IP over FE/GE transmission, the NodeB or eNodeB can obtain E1/T1clock signals from an E1/T1 link over the Abis interface.

Common E1/T1 referenceclock overthe Iubinterface

When the Abis interface on the multimode base station side uses IP co-transmission or IP hybrid transmission, the eGBTS or GBTS can obtain E1/T1 clock signals from an E1/T1 link over the Iub interface.When the Iub interface uses E1/T1 transmission and the S1 interface uses IPover GE transmission, the eNodeB can obtain E1/T1 clock signals from anE1/T1 link over the Iub interface.

NOTE

Only the UMTS mode can obtain E1/T1 clock signals from a UTRP board.The LTE mode can obtain E1/T1 clock signals only from a UMPT board.For details about the Common Transmission feature, seeCommon Transmission Feature ParameterDescription for SingleRAN.

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5.1 Common E1/T1 Reference Clock in Separate-MPTMultimode Base Stations

As shown in Figure 5-1, Figure 5-2, and Figure 5-3, one mode of a multimode base station isconfigured with an E1/T1 clock source, and then the other modes share E1/T1 clock signals byusing the BBU backplane.

Figure 5-1 A common E1/T1 reference clock in a separate-MPT GSM/UMTS dual-mode basestation



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Figure 5-2 A common E1/T1 reference clock in a separate-MPT GSM/LTE dual-mode basestation

Figure 5-3 A common E1/T1 reference clock in a separate-MPT UMTS/LTE dual-mode basestation

5.2 Common E1/T1 Reference Clock in Co-MPT MultimodeBase Stations

As shown in Figure 5-4, each mode uses the E1/T1 clock source configured for the UMPTboard. The UMPT board supports the Common Clock feature.



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Figure 5-4 A common E1/T1 reference clock in a co-MPT GSM/UMTS/LTE triple-mode basestation

5.3 Common E1/T1 Reference Clock in Hybrid-MPTMultimode Base Stations

As shown in Figure 5-5, only one BBU is used. Different modes of base stations can share anE1/T1 clock source by using the BBU backplane.



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Figure 5-5 A common E1/T1 reference clock in a hybrid-MPT GSM/UMTS/LTE triple-modebase station

When BBU Interconnection is enabled, one mode of a GSM/UMTS/LTE triple-mode basestation is configured with an E1/T1 clock source and the other two modes share the E1/T1 clocksource. The procedure for sharing the E1/T1 clock source is as follows:



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l As shown in Figure 5-6 , the common E1/T1 reference clock is in the primary BBU of aGSM/UMTS/LTE triple-mode base station. The GTMU board receives E1/T1 clock signalsfrom the transport network over an E1/T1 link and forwards them to the LMPT and UCIUboards. Upon receiving the clock signals, the UCIU board sends them to the UMPT boardin the secondary BBU, which receives them over the BBU interconnection port.

l As shown in Figure 5-7, the common E1/T1 reference clock is in the secondary BBU of aGSM/UMTS/LTE triple-mode base station. The UMPT board receives E1/T1 clock signalsfrom the transport network over an E1/T1 link and forwards them to the UCIU board in theprimary BBU. Upon receiving the clock signals, the UCIU board sends them to the GTMUand LMPT boards by using the BBU backplane.

Figure 5-6 A common E1/T1 reference clock in the primary BBU of a GSM/UMTS/LTEtriple-mode base station



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Figure 5-7 A common E1/T1 reference clock in the secondary BBU of a GSM/UMTS/LTEtriple-mode base station



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6 Common IEEE 1588v2 Reference ClockThis chapter describes the common IEEE 1588v2 reference clock in separate-MPT, co-MPT,and hybrid-MPT multimode base stations.Table 6-1 describes the typical application scenarios for a common IEEE 1588v2 referenceclock.

Table 6-1 Typical application scenarios for a common IEEE 1588v2 reference clockDeployment Scenario DescriptionCommon IEEE 1588v2 reference clock overthe Iub interface

When the Abis and Iub interfaces use IPtransmission and the NodeB of a multimodebase station is configured with an IEEE1588v2 clock source, the BTS can obtainclock signals from the WMPT or UMPTboard in the NodeB by using the BBUbackplane.When the Iub and S1 interfaces use IPtransmission and the NodeB of a multimodebase station is configured with an IEEE1588v2 clock source, the eNodeB can obtainclock signals from the WMPT or UMPTboard in the NodeB by using the BBUbackplane.

Common IEEE 1588v2 reference clock overthe S1 interface

When the Abis or Iub interface and the S1interface use the IP transmission and theeNodeB of a multimode base station isconfigured with an IEEE 1588v2 clocksource, the GBTS, eGBTS, or NodeB canobtain clock signals from the LMPT orUMPT board in the eNodeB by using theBBU backplane.

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Deployment Scenario DescriptionCommon IEEE 1588v2 reference clock overthe Abis interface

When the eGBTS or GBTS of a multimodebase station is configured with an IEEE1588v2 clock source, the NodeB or eNodeBcan obtain clock signals from the GTMUbboard in the GBTS or the UMPT_G board inthe eGBTS by using the BBU backplane.



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6.1 Common IEEE 1588v2 Reference Clock in Separate-MPTMultimode Base Stations

As shown in Figure 6-1, Figure 6-2, Figure 6-3, one main control board serving a mode isconnected to the transport network using an FE/GE port. The board is configured with an IEEE1588v2 clock client to obtain clock signals from an IEEE 1588v2 clock server. The oscillatorin the board synchronizes clock signals with the IEEE 1588v2 clock server and transmits thesynchronized 1 pulse per second (PPS) clock signals to the other main control board servinganother mode. In this case, only one IEEE 1588v2 clock client is required. FE stands for fastEthernet and GE stands for gigabit Ethernet.Only LTE TDD shares the IEEE 1588v2 reference clock to other modes, not vice versa. If othermodes share the IEEE 1588v2 reference clock to LTE TDD, the reference clock can usefrequency synchronization only. This is because LTE TDD supports only time synchronization.

Figure 6-1 A common IEEE 1588v2 reference clock in a separate-MPT GSM/UMTS dual-modebase station



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Figure 6-2 A common IEEE 1588v2 reference clock in a separate-MPT GSM/LTE dual-modebase station

Figure 6-3 A common IEEE 1588v2 reference clock in a separate-MPT UMTS/LTE dual-modebase station



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6.2 Common IEEE 1588v2 Reference Clock in Co-MPTMultimode Base Stations

As shown in Figure 6-4, each mode uses the IEEE 1588v2 clock source configured for theUMPT board. The UMPT board supports the Common Clock feature. The shared IEEE 1588v2reference clock supports frequency synchronization and time synchronization. If the LTE TDDmode is used, the clock source must use time synchronization.

Figure 6-4 A common IEEE 1588v2 reference clock in a co-MPT GSM/UMTS/LTE triple-mode base station

6.3 Common IEEE 1588v2 Reference Clock in Hybrid-MPTMultimode Base Stations

As shown in Figure 6-5, only one BBU is used. Different modes of base stations can share anIEEE 1588v2 clock source by using the BBU backplane. Only LTE TDD shares the IEEE 1588v2reference clock to other modes, not vice versa. If other modes share the IEEE 1588v2 referenceclock to LTE TDD, the reference clock can use frequency synchronization only. This is becauseLTE TDD supports only time synchronization.



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Figure 6-5 A common IEEE 1588v2 reference clock in a hybrid-MPT GSM/UMTS/LTE triple-mode base station



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When BBU Interconnection is enabled, one mode of a GSM/UMTS/LTE triple-mode basestation is configured with an IEEE 1588v2 clock source and the other two modes share the IEEE1588v2 clock source. The procedure for sharing the IEEE 1588v2 clock source is as follows:l As shown in Figure 6-6, the common IEEE 1588v2 reference clock is in the primary BBU

of a GSM/UMTS/LTE triple-mode base station. The LMPT board is configured with anIEEE 1588v2 clock client and receives IEEE 1588v2 clock packets containing clock signalsfrom an IEEE 1588v2 clock server through the transport network. Then, the LMPT boardgenerates synchronized 1 PPS clock signals and forwards them to the GTMU and UCIUboards. Upon receiving the synchronized 1 PPS clock signals, the UCIU board sends themto the UMPT board in the secondary BBU. Base stations of other modes in the primaryBBU obtain 1 PPS clock signals by using the BBU backplane.

l As shown in Figure 6-7, the common IEEE 1588v2 reference clock is in the secondaryBBU of a GSM/UMTS/LTE triple-mode base station. The UMPT board is configured withan IEEE 1588v2 clock client and receives IEEE 1588v2 clock packets containing clocksignals from an IEEE 1588v2 clock server through the transport network. Then, the UMPTboard generates synchronized 1 PPS clock signals and forwards them to the UCIU boardin the primary BBU, which in turn forwards them to the GTMU and WMPT boards.

Transmission port cabling on a multimode base station and the cabling of a common IEEE1588v2 reference clock are independently deployed. Therefore, the operation of the multimodebase station is not affected.

Figure 6-6 A common IEEE 1588v2 reference clock in the primary BBU of a GSM/UMTS/LTE triple-mode base station



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Figure 6-7 A common IEEE 1588v2 reference clock in the secondary BBU of a GSM/UMTS/LTE triple-mode base station



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7 Common Synchronous Ethernet ReferenceClock

This chapter describes the common synchronous Ethernet reference clock in separate-MPT, co-MPT, and hybrid-MPT multimode base stations. The synchronous Ethernet reference clock onlysupports frequency synchronization, and does not support time synchronization. The LTE modeand eNodeB mentioned in this chapter refer to FDD.Table 7-1 describes the typical application scenarios for a common synchronous Ethernetreference clock.

Table 7-1 Typical application scenarios for a common synchronous Ethernet reference clockDeployment Scenario

Description

CommonsynchronousEthernetreferenceclock overthe Iubinterface

When the Iub interface on the multimode base station side uses IP transmissionand the IP network supports Ethernet clock synchronization, the eGBTS,GBTS, or eNodeB can obtain clock signals from the WMPT, UMPT, UTRPboard in the NodeB by using the BBU backplane. The UTRP board is managedby the UMTS mode and supports FE/GE transmission.

CommonsynchronousEthernetreferenceclock overthe S1interface

When the S1 interface uses IP transmission and the IP network supportsEthernet clock synchronization, the eGBTS, GBTS, or NodeB can obtainclock signals from the LMPT, UMPT, UTRP board in the eNodeB by usingthe BBU backplane. The UTRP board is managed by the LTE mode andsupports FE/GE transmission.

SingleRANCommon Clock Feature Parameter Description 7 Common Synchronous Ethernet Reference Clock


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Deployment Scenario

Description

CommonsynchronousEthernetreferenceclock overthe Abisinterface

When the eGBTS or GBTS of a multimode base station is configured with asynchronous Ethernet clock source, the NodeB or eNodeB can obtain clocksignals by using the BBU backplane from any of the following boards:l UMPT or UTRP board in the eGBTSl GTMUb or UTRP board in the GBTSThe UTRP board is managed by the GSM mode and supports FE/GEtransmission.



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7.1 Common Synchronous Ethernet Reference Clock inSeparate-MPT Multimode Base Stations

As shown in Figure 7-1, Figure 7-2, Figure 7-3, to implement a common synchronous Ethernetreference clock, one mode of a dual-mode base station must connect to the transport networkover its FE/GE port and the IP network must support Ethernet clock synchronization. Thisensures that the other mode of the base station can receive synchronous Ethernet clock signalsby using the BBU backplane.

Figure 7-1 A common synchronous Ethernet reference clock in a separate-MPT GSM/UMTSdual-mode base station



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Figure 7-2 A common synchronous Ethernet reference clock in a separate-MPT GSM/LTE dual-mode base station

Figure 7-3 A common synchronous Ethernet reference clock in a separate-MPT UMTS/LTEdual-mode base station



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7.2 Common Synchronous Ethernet Reference Clock in Co-MPT Multimode Base Stations

As shown in Figure 7-4, each mode uses the synchronous Ethernet clock source configured forthe UMPT board. The UMPT board supports the Common Clock feature.

Figure 7-4 A common synchronous Ethernet reference clock in a co-MPT GSM/UMTS/LTEtriple-mode base station

7.3 Common Synchronous Ethernet Reference Clock inHybrid-MPT Multimode Base Stations

As shown in Figure 7-5, only one BBU is used. Different modes of base stations can share asynchronous Ethernet clock source by using the BBU backplane.



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Figure 7-5 A common synchronous Ethernet reference clock in a hybrid-MPT GSM/UMTS/LTE triple-mode base station



36

When BBU Interconnection is enabled, one mode of a GSM/UMTS/LTE triple-mode basestation is configured with a synchronous Ethernet clock source and the other two modes sharethe clock source. The procedure for sharing the synchronous Ethernet clock source is as follows:l As shown in Figure 7-6, the common synchronous Ethernet reference clock in the primary

BBU of a GSM/UMTS/LTE triple-mode base station. The WMPT board receivessynchronous Ethernet clock signals from the transport network over an FE link andforwards them to the GTMU and UCIU boards. Upon receiving the clock signals, the UCIUboard sends them to the UMPT board in the secondary BBU. The other mode of base stationin the primary BBU obtains synchronous Ethernet clock signals by using the BBUbackplane.

l As shown in Figure 7-7, the common synchronous Ethernet reference clock in thesecondary BBU of a GSM/UMTS/LTE triple-mode base station. The UMPT board receivessynchronous Ethernet clock signals from the transport network over a GE link and forwardsthem to the UCIU board in the primary BBU. Upon receiving the clock signals, the UCIUboard sends them to the GTMU and WMPT boards.

Figure 7-6 A common synchronous Ethernet reference clock in the primary BBU of aGSM/UMTS/LTE triple-mode base station



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Figure 7-7 A common synchronous Ethernet reference clock in the secondary BBU of a GSM/UMTS/LTE triple-mode base station



38

8 Other Common Reference ClocksWhen the GSM, UMTS, and LTE modes share a UMTS board, besides common GPS, BITS,E1/T1, IEEE 1588v2, and synchronous Ethernet reference clocks, the following commonreference clocks can be used:l Common 1PPS+TOD reference clockl Common IEEE 1588v2+SyncE reference clockThese two common reference clocks are used only when the GSM, UMTS, and LTE modesshare a UMPT board. This is because these two common reference clocks only support a singlemode in a separate-MPT multimode base station.

SingleRANCommon Clock Feature Parameter Description 8 Other Common Reference Clocks


39

8.1 Common 1PPS+TOD Reference Clock in Co-MPT GSM/UMTS/LTE Triple-mode Base Stations

The 1PPS+TOD clock source supports frequency synchronization and time synchronization. Asshown in Figure 8-1, the USCU and UMPT boards can receive 1PPS+TOD clock signals. TheUMPT board is configured with the 1PPS+TOD clock source, which is shared by the GSM,UMTS, and LTE modes.

Figure 8-1 A common 1PPS+TOD reference clock in a co-MPT GSM/UMTS/LTE triple-mode base station

8.2 Common IEEE 1588v2+SyncE Reference Clock in Co-MPT GSM/UMTS/LTE Triple-mode Base Stations

The IEEE 1588v2+SyncE clock source combines the IEEE 1588v2 clock and synchronousEthernet clock and supports only time synchronization. The clock source of the IEEE 1588v2clock server must be the same as that of the synchronous Ethernet. As shown in Figure 8-2, theUMPT board is configured with the IEEE 1588v2+SyncE clock source, which is shared by theGSM, UMTS, and LTE modes. The clock source of the IEEE 1588v2 clock server and thesynchronous Ethernet in Figure 8-2 are GPS.



40

Figure 8-2 A common IEEE 1588v2+SyncE reference clock in a co-MPT GSM/UMTS/LTE triple-mode base station



41

9 Engineering Guidelines9.1 When to Use Common Clock

It is recommended that MRFD-211601 Multi-mode BS Common Reference Clock(GBTS/eGBTS), MRFD-221601 Multi-mode BS Common Reference Clock(NodeB), orMRFD-231601 Multi-mode BS Common Reference Clock (eNodeB) be enabled for amultimode base station to reduce the OPEX and CAPEX.

9.2 Required InformationThe information to be collected is as follows:l Whether the multimode base station using the LTE TDD mode is configured with a GPS

antennaIf the multimode base station is configured with a GPS antenna, it is recommended that allmodes of the base station share a GPS reference clock.

l Transmission scheme used by the multimode base station that does not use the LTE TDDmode If at least one mode of the multimode base station uses E1/T1 transmission, use a

common E1/T1 reference clock. If all modes of the multimode base station use FE/GE transmission, check whether

synchronous Ethernet is supported. If yes, use a common synchronous Ethernetreference clock. If no, use a common IEEE 1588v2 reference clock.

9.3 RequirementsMRFD-211601 Multi-mode BS Common Reference Clock(GBTS/eGBTS), MRFD-221601Multi-mode BS Common Reference Clock(NodeB), MRFD-231601 Multi-mode BS CommonReference Clock(eNodeB), and MRFD-241601 Multi-mode BS Common Reference Clock(LTETDD) are under license control.MRFD-231601 Multi-mode BS Common Reference Clock(eNodeB) and MRFD-241601 Multi-mode BS Common Reference Clock(LTE TDD) have license control items. The other twofeatures only have license sales items and do not have license control items.

SingleRANCommon Clock Feature Parameter Description 9 Engineering Guidelines


42

FeatureID

FeatureName

License Control Item NE Sales Unit

MRFD-231601

Multi-mode BSCommonReferenceClock(eNodeB)

Function-LTE-LLT1MCRC01 CommonClock (eNodeB) (pereNodeB)

eNodeB per eNodeB

MRFD-241601

Multi-mode BSCommonReferenceClock(LTETDD)

eNodeB Per eNodeB

The following are the requirements for FDD(TDD):l The TDD eNodeB can only use the GPS reference clock provided by the GBTS/eGBTS

that uses time synchronization.l The TDD eNodeB can only use the GPS reference clock provided by the NodeB that uses

time synchronization.l The TDD eNodeB can only use the GPS reference clock provided by the co-MPT base

station that uses time synchronization.l If the LTE TDD mode is used in a multimode base station, a clock source that supports

time synchronization must be used, for example, GPS reference clock, IEEE 1588v2reference clock, 1PPS+TOD reference clock, or IEEE 1588v2+SyncE reference clock. Inaddition, the clock source must use time synchronization.

Hardwarel This feature applies only to GSM/UMTS/LTE triple-mode base stations.l If a BITS reference clock is used, a USCU board must be installed in the BBU.

Other Featuresl Common GPS reference clock

GBFD-510401 BTS GPS Synchronization MRFD-210501 BTS/NodeB Clock LBFD-00300504 Synchronization with BITS TDLBFD-00300503 Synchronization with GPS

l Common BITS reference clock MRFD-210501 BTS/NodeB Clock LBFD-00300504 Synchronization with BITS

l Common synchronous Ethernet reference clock



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GBFD-118202 Synchronous Ethernet WRFD-050502 Synchronous Ethernet LOFD-00301301 Synchronization with Ethernet(ITU-T G.8261)

l Common IEEE 1588v2 reference clock MRFD-210501 BTS/NodeB Clock WRFD-050501 Clock Sync on Ethernet in NodeB LOFD-00301302 IEEE 1588v2 Clock Synchronization TDLOFD-00301302 IEEE1588 V2 Clock Synchronization

l Common 1PPS+TOD reference clock MRFD-210501 BTS/NodeB Clock LBFD-00300505 Synchronization with 1PPS TDLBFD-00300505 Synchronization with 1PPS

l Common IEEE 1588v2+SyncE reference clock GBFD-118202 Synchronous Ethernet WRFD-050502 Synchronous Ethernet LOFD-00301302 IEEE 1588v2 Clock Synchronization LOFD-00301301 Synchronization with Ethernet(ITU-T G.8261)

9.4 Initial ConfigurationThis document provides system clock configuration for each of the NEs that share a clock sourceand their common reference clock configuration. For details about how to configure the clocksource of the NE that provides the common reference clock, see Synchronization FeatureParameter Description for the corresponding mode. This section describes how to configure acommon clock in typical application scenarios.

9.4.1 GBTS/eGBTS Providing Clock Source for NodeB/eNodeB/Co-MPT Base Station

The configuration procedure involves configuring the reference clock on the GBTS or eGBTSside and Configuring a Common Reference Clock for NodeB/eNodeB/Co-MPT BaseStation. To configure a reference clock on the GBTS or eGBTS side, refer to one of the followingsections:l Configuring a Common GPS Reference Clock on the GBTS or eGBTS Sidel Configuring a Common BITS Reference Clock on the GBTS or eGBTS Sidel Configuring a Common E1/T1 Reference Clock on the GBTS or eGBTS Sidel Configuring a Common IEEE 1588v2 Reference Clock on the GBTS or eGBTS Sidel Configuring a Common Synchronous Ethernet Reference Clock on the GBTS or

eGBTS Side

Configuring a Common GPS Reference Clock on the GBTS or eGBTS SideBefore configuring a common GPS reference clock, ensure that the GBTS or eGBTS has beenconfigured with a USCU board.



44

To configure a common GPS reference clock for the GBTS, perform the following steps:

Step 1 Run the SET BTSUSCUBP command to add a GPS clock link.Step 2 Run the SET BTSCLK command with ClkType (the CME name is Clock Type) set to

TRCGPS_CLK(Trace GPS Clock).

----EndTo configure a common GPS reference clock for the eGBTS, perform the following steps:

Step 1 Run the ADD GPS command to add a GPS clock link.Step 2 Run the SET CLKMODE command to activate the GPS reference clock. Set the key parameters

according to the descriptions in the following table.Parameter Name MML Parameter

IDParameter Nameon the CME

Setting Notes

System clockworking mode

MODE System ClockWorking Mode

Set this parameter toMANUAL(ManualHandover).

Selected ClockSource

CLKSRC Clock Source Type Set this parameter toGPS(GPS Clock).

----End

Configuring a Common BITS Reference Clock on the GBTS or eGBTS SideBefore configuring a common BITS reference clock, ensure that the GBTS or eGBTS has beenconfigured with a USCU board.To configure a common BITS reference clock for the GBTS, perform the following step:Run the SET BTSCLK command with ClkType (the CME name is Clock Type) set toEXTSYN_CLK(External Sync clock).To configure a common BITS reference clock for the eGBTS, perform the following steps:

Step 1 Run the ADD BITS command to add a BITS clock link.Step 2 Run the SET CLKMODE command to activate the BITS reference clock. Set the key

parameters according to the descriptions in the following table.Parameter Name MML Parameter


Setting Notes





CLKSRC Clock Source Type Set this parameter toBITS(BITS Clock).



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----End

Configuring a Common E1/T1 Reference Clock on the GBTS or eGBTS SideBefore configuring a common E1/T1 reference clock, ensure that an E1/T1 clock link isavailable.To configure a common E1/T1 reference clock for the GBTS, perform the following step:Run the SET BTSCLK command with ClkType (the CME name is Clock Type) set toTRCBSC_CLK(Trace BSC Clock).To configure a common E1/T1 reference clock for the eGBTS, perform the following steps:

Step 1 Run the ADD LINECLK command to add an E1/T1 clock link. In this step, set Port Type(Port Type on the CME) to E1T1(E1T1).

Step 2 Run the SET CLKMODE command to activate the E1/T1 reference clock. Set the keyparameters according to the descriptions in the following table.

Parameter Name MML ParameterID

Parameter Nameon the CME

Setting Notes





CLKSRC Clock Source Type Set this parameter toLINECLK(LineClock).

----End

Configuring a Common IEEE 1588v2 Reference Clock on the GBTS or eGBTS SideTo configure a common IEEE 1588v2 reference clock for the GBTS, perform the followingsteps:

Step 1 Run the SET BTSIPCLKPARA command to configure parameters for an IEEE 1588v2 clocklink. Set the key parameters according to the descriptions in the following table.



Setting Notes

Clock Protocol Type CLKPRTTYPE Clock Protocol Type Set this parameter toPTP(PTP).



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Setting Notes

IP Clock TimeSynchronizationMode

SYNMode ClockSynchronizationMode

Set this parameter toCONSYN(ConsecutiveSynchronizing) orINTERSYN(IntermittentSynchronizing).

Clock TopologyMode

CLKTOPOMODE Clock TopologyMode

Set this parameter toPTPOVERUDP(PTP over UDPUnicast) orPTPOVERMAC(PTP over MACMulticast).

Clock ReferenceSource Redundancy

ISCLKREDUCY Clock ReferenceSource Redundancy

Set this parameter toUNSUPPORT(NotSupport Reducy) orSUPPORT(Support Reducy).

Clock Server 0 IPAddress

MASTERIPADDR Clock Server 0 IPAddress

Set this parameter tothe IP address ofclock server 0 on theIP clock link.

Clock Server 1 IPAddress

SLAVEIPADDR Clock Server 1 IPAddress

Set this parameter tothe IP address ofclock server 1 on theIP clock link.

Step 2 Run the SET BTSCLK command with ClkType (the CME name is Clock Type) set to

IP_TIME(IP Clock).----EndTo configure a common IEEE 1588v2 reference clock for the eGBTS, perform the followingsteps:

Step 1 Run the ADD IPCLKLINK command to add an IEEE 1588v2 clock link. Set the key parametersaccording to the descriptions in the following table.



Setting Notes

Protocol Type ICPT Protocol Type Set this parameter toPTP(PTP).



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Setting Notes

Profile Type PROFILETYPE Profile Type Set this parameter to1588V2(1588V2) orG.8265.1(G.8265.1).In most cases, set thisparameter to 1588V2(1588V2). If the IPclock server is athird-party device,set this parameter toG.8265.1(G.8265.1)to ensure the correctinterworkingbetween the basestation and the IPclock server.

Slot No. SN Slot No. Set this parameter tothe number of the slotthat accommodatesthe IP clock link.

Clock TopologyMode

CNM Clock Net Mode Set this parameter toUNICAST(Unicast),L3_MULTICAST(L3 Multicast), orL2_MULTICAST(L2 Multicast).

Client IP CIP Client IPv4 Set this parameter tothe IPv4 address ofthe client at the IPclock link.

Server IP SIP Server IPv4 Set this parameter tothe IPv4 address ofthe server at the IPclock link.

NOTE

If the IEEE 1588v2 clock server and the eGBTS are on different network segments, run the ADD IPRTcommand to configure the route between the IEEE 1588v2 clock server and the eGBTS.

Step 2 Run the SET CLKMODE command to activate the IEEE 1588v2 reference clock. Set the keyparameters according to the descriptions in the following table.



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Setting Notes


MODE Clock WorkingMode



CLKSRC Selected ClockSource

Set this parameter toIPCLK(IP Clock).


SYNMODE SynchronizationMode

Set this parameter toABSOLUTE(ABSOLUTE),RELATIVE(RELATIVE), orOFF(OFF).

----End

Configuring a Common Synchronous Ethernet Reference Clock on the GBTS oreGBTS Side

Before configuring a common synchronous Ethernet reference clock, ensure that all transmissionequipment supports the synchronous Ethernet.To configure a common synchronous Ethernet reference clock for the GBTS, perform thefollowing step:Run the SET BTSCLK command with ClkType (the CME name is Clock Type) set toSYNETH_CLK(SynEth Clock). Then, run the ADD SYNCETH command to add asynchronous Ethernet clock link. Set the key parameters according to the descriptions in thefollowing table.



Setting Notes

Slot No. SN Slot No. Set this parameter tothe number of the slotthat accommodatesthe synchronousEthernet clock link.

Port No. PN Port No. Set this parameter tothe number of theport thataccommodates thesynchronousEthernet clock link.



49

To configure a common synchronous Ethernet reference clock for the eGBTS, perform thefollowing steps:

Step 1 Run the ADD SYNCETH command to add a synchronous Ethernet clock link. Set the keyparameters according to the descriptions in the following table.



Setting Notes



SSM Selection SSM SynchronizationStatus Message

Set this parameter toDISABLE(DISABLE) orENABLE(ENABLE).

Step 2 Run the SET CLKMODE command to activate the synchronous Ethernet reference clock. Set

the key parameters according to the descriptions in the following table.Parameter Name MML Parameter


Setting Notes






Set this parameter toSYNCETH(SyncEth Clock).

----End

Configuring a Common Reference Clock for NodeB/eNodeB/Co-MPT Base StationStep 1 Run the ADD PEERCLK command to add a peer reference clock link.Step 2 Run the SET CLKMODE command to configure the working mode of the reference clock.



50



Setting Notes






Set this parameter toPEERCLK(PeerClock).

----End

9.4.2 NodeB Providing Clock Source for GBTS/eGBTS/eNodeB/Co-MPT Base Station

The configuration procedure involves configuring the reference clock on the NodeB side andConfiguring a Common Reference Clock on the GBTS Side or Configuring a CommonReference Clock on the eGBTS/eNodeB/Co-MPT Base Station side. To configure a referenceclock on the NodeB side, refer to one of the following sections:l Configuring a Common GPS Reference Clock on the NodeB Sidel Configuring a Common BITS Reference Clock on the NodeB Sidel Configuring a Common E1/T1 Reference Clock on the NodeB Sidel Configuring a Common IEEE 1588v2 Reference Clock on the NodeB Sidel Configuring a Common Synchronous Ethernet Reference Clock on the NodeB Side

Configuring a Common GPS Reference Clock on the NodeB SideBefore configuring a common GPS reference clock, ensure that the NodeB has been configuredwith a USCU board.




Setting Notes






----End



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Configuring a Common BITS Reference Clock on the NodeB SideBefore configuring a common BITS reference clock, ensure that the NodeB has been configuredwith a USCU board.




Setting Notes






----End

Configuring a Common E1/T1 Reference Clock on the NodeB SideBefore configuring a common E1/T1 reference clock, ensure that an E1/T1 clock link isavailable.





Setting Notes






----End

Configuring a Common IEEE 1588v2 Reference Clock on the NodeB SideStep 1 Run the ADD IPCLKLINK command to add an IEEE 1588v2 clock link. Set the key parameters

according to the descriptions in the following table.



52

Parameter Name

MMLParameter ID

Parameter Nameon theCME

Setting Notes

ProtocolType

ICPT ProtocolType

Set this parameter to PTP(PTP).

ProfileType

PROFILETYPE

ProfileType

Set this parameter to 1588V2(1588V2) or G.8265.1(G.8265.1).In most cases, set this parameter to 1588V2(1588V2). If the IP clock server is a third-partydevice, set this parameter to G.8265.1(G.8265.1) to ensure the correct interworkingbetween the base station and the IP clock server.

Slot No. SN Slot No. Set this parameter to the number of the slot thataccommodates the IP clock link.

ClockTopologyMode

CNM Clock NetMode

Set this parameter to UNICAST(Unicast),L3_MULTICAST(L3 Multicast), orL2_MULTICAST(L2 Multicast).

Client IP CIP ClientIPv4

Set this parameter to the IPv4 address of theclient at the IP clock link.

Server IP SIP ServerIPv4

Set this parameter to the IPv4 address of theserver at the IP clock link.

NOTE

If the IEEE 1588v2 clock server and the NodeB are on different network segments, run the ADD IPRTcommand to configure the route between the IEEE 1588v2 clock server and the NodeB.The NodeB does not support IPV6.




Setting Notes









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Setting Notes




----End

Configuring a Common Synchronous Ethernet Reference Clock on the NodeB SideBefore configuring a common synchronous Ethernet reference clock, ensure that all transmissionequipment supports the synchronous Ethernet.




Setting Notes

Slot No. SN Slot No. Set this parameter tothe number of the slotthat accommodates thesynchronous Ethernetclock link.

Port No. PN Port No. Set this parameter tothe number of the portthat accommodates thesynchronous Ethernetclock link.




the key parameters according to the descriptions in the following table.Parameter Name MML Parameter


Setting Notes






54



Setting Notes




----End

Configuring a Common Reference Clock on the GBTS SideRun the SET BTSCLK command with ClkType ( on the CME name is Clock Type) set toPEERCLK(Peer Clock).

Configuring a Common Reference Clock on the eGBTS/eNodeB/Co-MPT BaseStation side

Step 1 Run the ADD PEERCLK command to add a peer reference clock link.Step 2 Run the SET CLKMODE command to configure the working mode of the reference clock.



Setting Notes







----End

9.4.3 The eNodeB Providing Clock Source for GBTS/eGBTS/NodeB/Co-MPT Base Station

The configuration procedure involves configuring the reference clock on the eNodeB side andConfiguring a Common Reference Clock on the GBTS Side or Configuring a CommonReference Clock on the eGBTS/NodeB/Co-MPT Base Station side. To configure a referenceclock on the eNodeB side, refer to one of the following sections:l Configuring a Common GPS Reference Clock on the eNodeB Sidel Configuring a Common BITS Reference Clock on the FDD eNodeB Sidel Configuring a Common E1/T1 Reference Clock on the FDD eNodeB Sidel Configuring a Common IEEE 1588v2 Reference Clock on the eNodeB Sidel Configuring a Common Synchronous Ethernet Reference Clock on the FDD eNodeB Side



55

Configuring a Common GPS Reference Clock on the eNodeB SideStep 1 Run the ADD GPS command to add a GPS clock link.Step 2 Run the SET CLKMODE command to activate the GPS reference clock. Set the key parameters



Setting Notes






----End

NOTE

The eNodeB does not support switch between clock sources. Therefore, the System clock workingmode parameter must be set to MANUAL(Manual Handover).

Configuring a Common BITS Reference Clock on the FDD eNodeB SideBefore configuring a common BITS reference clock, ensure that the eNodeB has been configuredwith a USCU board.




Setting Notes






----End

Configuring a Common E1/T1 Reference Clock on the FDD eNodeB SideBefore configuring a common E1/T1 reference clock, ensure that a UMPT board has beenconfigured and an E1/T1 clock link is available.




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Setting Notes






----End

Configuring a Common IEEE 1588v2 Reference Clock on the eNodeB SideStep 1 Run the ADD IPCLKLINK command to add an IEEE 1588v2 clock link. Set the key parameters



Setting Notes






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Setting Notes

Clock TopologyMode




Client IPv6 CIPV6 Client IPv6 Set this parameter tothe client IPv6address of the IPclock link.

Server IPv6 SIPV6 Server IPv6 Set this parameter tothe server IPv6address of the IPclock link.

NOTE

If the IEEE 1588v2 clock server and the eNodeB are on different network segments, run the ADD IPRTcommand to configure the route between the IEEE 1588v2 clock server and the eNodeB.




Setting Notes









58



Setting Notes




----End

Configuring a Common Synchronous Ethernet Reference Clock on the FDDeNodeB Side

Before configuring a common synchronous Ethernet reference clock, ensure that all transmissionequipment supports the synchronous Ethernet.




Setting Notes






the key parameters according to the descriptions in the following table.



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Setting Notes







----End

Configuring a Common Reference Clock on the GBTS SideRun the SET BTSCLK command with ClkType ( on the CME name is Clock Type) set toPEERCLK(Peer Clock).

Configuring a Common Reference Clock on the eGBTS/NodeB/Co-MPT BaseStation side

Step 1 Run the ADD PEERCLK command to add a peer reference clock link.Step 2 Run the SET CLKMODE command to configure the working mode of the reference clock.



Setting Notes







----End

9.4.4 Co-MPT Base Station Providing Clock Source for GBTS/eGBTS/NodeB/eNodeB

This section describes how co-MPT multimode base stations provide the clock source forseparate-MPT multimode base stations in hybrid-MPT scenarios.The configuration procedure involves configuring the reference clock on the co-MPT multimodebase station side and Configuring a Common Reference Clock on the GBTS Side orConfiguring a Common Reference Clock on the eGBTS/NodeB/eNodeB side. To configurea reference clock on the co-MPT multimode base station side, refer to one of the followingsections:



60

l Configuring a Common GPS Reference Clock on the Co-MPT Base Station Sidel Configuring a Common BITS Reference Clock on the Co-MPT Base Station Sidel Configuring a Common E1/T1 Reference Clock on the Co-MPT Base Station Sidel Configuring a Common IEEE 1588v2 Reference Clock on the Co-MPT Base Station

Sidel Configuring a Common Synchronous Ethernet Reference Clock on the Co-MPT Base

Station Side

Configuring a Common GPS Reference Clock on the Co-MPT Base Station SideBefore configuring a common GPS reference clock, ensure that the co-MPT multimode basestation has been configured with a USCU board.




Setting Notes






----End

Configuring a Common BITS Reference Clock on the Co-MPT Base Station SideBefore configuring a common BITS reference clock, ensure that the co-MPT multimode basestation has been configured with a USCU board.




Setting Notes






----End



61

Configuring a Common E1/T1 Reference Clock on the Co-MPT Base Station SideBefore configuring a common E1/T1 reference clock, ensure that an E1/T1 clock link isavailable.





Setting Notes






----End

Configuring a Common IEEE 1588v2 Reference Clock on the Co-MPT Base StationSide

Step 1 Run the ADD IPCLKLINK command to add an IEEE 1588v2 clock link. Set the key parametersaccording to the descriptions in the following table.



Setting Notes





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Setting Notes


Clock TopologyMode




Client IPv6 CIPV6 Client IPv6 Set this parameter tothe client IPv6address of the IPclock link.

Server IPv6 SIPV6 Server IPv6 Set this parameter tothe server IPv6address of the IPclock link.

NOTE

If the IEEE 1588v2 clock server and the co-MPT multimode base station are on different network segments,run the ADD IPRT command to configure the route between the IEEE 1588v2 clock server and the co-MPT multimode base station.




Setting Notes






63



Setting Notes







----End

Configuring a Common Synchronous Ethernet Reference Clock on the Co-MPTBase Station Side

Before configuring a common synchronous Ethernet reference clock, ensure that all transmissionequipment supports the synchronous Ethernet.




Setting Notes






the key parameters according to the descriptions in the following table.



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Setting Notes







----End

Configuring a Common Reference Clock on the GBTS SideRun the SET BTSCLK command with ClkType (the CME name is Clock Type) set toPEERCLK(Peer Clock).

Configuring a Common Reference Clock on the eGBTS/NodeB/eNodeB sideStep 1 Run the ADD PEERCLK command to add a peer reference clock link.Step 2 Run the SET CLKMODE command to configure the working mode of the reference clock.



Setting Notes







----End

9.4.5 Co-MPT Base Station Supporting Common Reference Clockamong GSM, UMTS, and LTE

A co-MPT multimode base station supports the Common Clock feature. For details about howto configure a common GPS, BITS, E1/T1, IEEE1588V2, or synchronous Ethernet referenceclock, see section 9.4.4 Co-MPT Base Station Providing Clock Source for GBTS/eGBTS/NodeB/eNodeB.

Configuring a Common 1PPS+TOD Reference ClockStep 1 Run the ADD TOD command to add a 1PPS+TOD clock link.Step 2 Run the SET CLKMODE command to activate the GPS reference clock. Set the key parameters

according to the descriptions in the following table.



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Setting Notes





CLKSRC Clock Source Type Set this parameter toTOD(TOD Clock).

----End

Configuring a Common IEEE 1588v2+SyncE Reference ClockBefore configuring a common IEEE1588V2+SyncE reference clock, ensure that theIEEE1588V2 IP clock server and the synchronous Ethernet share a clock source.




Setting Notes




Set this parameter toDISABLE(

common clock(sran9.0_draft a)

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