huawei
DESCRIPTION
wcdma rnnoTRANSCRIPT
3G2G HandOver and Roaming
Brief
In Idle Mode , UE use cell reselection to enter GSM Network
Connect Mode, UE use HandOver to enter GSM Network.
Cell Selection
PLMN Selection
1) when ue is power on , it scans RF and read MIB
to define whether this cell’s PLMN is what it wants.
2) PLMN has order list .
Auto Selection
i) RPLMN
ii) Home PLMN
iii) User or Operator controlled PLMN selector with Access
Technology
Manual Selection Read SIB3 , Evaluate S Criteria
IF matchs S Criteria , Camped on the cell ,then LA/RA update. Else read SIB11 finds neighbor cells , Evaluate S Criteria for neighbor cells
if matched ,
camped
else
scan other cells or in PLMN selection.
end
camped on any cell .
Cell Reselection
All Neighbor Cell evaluate S criteria .
In S>0 cells , Compute R value.
Select Rmax Cell .
S & R Criteria
Squal = Qqualmeas - Qqualmin
Srxlev = Qrxlevmeas - Qrxlevmin - Pcompensation
Squal > 0
Srxlev > 0
Rs = Qmap,s + Qhysts
Rn = Qmap,n - Qoffsets,n - TOn * (1 - Ln)
Cell Selection &Reseletion Parameters(1)
Qqualmin Value range: -24 -- 0 (dB)Content: Minimum required quality level corresponding to the CPICH Ec/No. UE can camp
on the cell only when the CPICH Ec/No measured is larger than the value of this parameter.
Recommended value: -18(dB).
Qrxlevmin Value range: -58 -- -13. (dBm)Physical value range: -115 -- -25; step: 2 (-58: -115; -57:-113; ..., -13:25). Content: Minimum required RX level corresponding to the CPICH RSCP. UE can camp on
the cell only when the measured CPICH RSCP is larger than the value of this parameter.. Recommended value: -58.
Qqualmeas Measured cell quality value. The quality of the received signal expressed in CPICH Ec/N0 (dB) for FDD cells. Not applicable for TDD cells or GSM cells.
Qrxlevmeas Measured cell RX level value. This is received signal, CPICH RSCP for FDD cells (dBm), P-CCPCH RSCP for TDD cells (dBm) and RXLEV for GSM cells (dBm).
Pcompensation Max(UE_TXPWR_MAX_RACH – P_MAX, 0) (dB)
Pmax Value range: -50 -- 33 (dBm) Content: Allowed maximum power transmitted on RACH in the cell. It is related to network
planning. Recommended value: 24.
Cell Selection &Reseletion Parameters(2)Treselectiontime
Value range: 0~31 Physical unit: second.
Content: If the signal quality of a neighbor cell is better than the serving cell during the
specified time of this parameter, the UE will reselect the neighbor cell. It is used to avoid
ping-pong reselection of UE between different cells. Note: 0 does not refer to 0 second but
corresponds to the default value defined in the protocol.
Recommended value: 0.
Ssearch.RAT Value range: -16~10 Physical value range: -32 ~ 20; step: 2. Physical unit: dB. Content: Threshold for inter-RAT cell reselection. When the quality (CPICH Ec/No measured by UE) of the serving cell is lower than the threshold plus the minimum required quality ( Qqualmin) of the cell, the inter-RAT cell reselection procedure will be started. It's mandatory When the value of parameter SsearchratInd is TRUE. Recommended value: 2.
Qhyst1s Value range: 0-20 Physical value range: 0 – 40(dB); step: 2. Content: Hysteresis value for serving FDD cells in case the quality measure for cell selection and re-selection is set to CPICH RSCP. It changes with the slow-fading feature of the area where the cell is located. The bigger the slow-fading variance is, the bigger this value of the parameter. Recommended value: 2.
Qhyst2s Value range: 0 - 20 Physical value range: 0 – 40 (dB); step: 2.Content: Hysteresis value for serving FDD cells in case the quality measure for cell selection and re-selection is set to CPICH Ec/No. It changes with the slow-fading feature of the area where the cell is located. The bigger the slow-fading variance is, the bigger this value of this parameter. Recommended value: 1.
CELL Selection & Reselection MML COMMAND
Cell Selection & Reselection Command
1) MOD CELLSELRESEL
2) MOD INTERRATNCELL
3) MOD CELLMEAS
HandOver -CS_3G->2G ( 1 )UE
1. RRC Connect Req
15. RAB Assign Req
NODEB RNC 3G MSC BSS2G MSC
2. RRC Setup Complete
3. Measure Control (measure ID 0x1 ) 4. Measure Control (measure ID 0x2 )
5.Initial UE message(service request)6.DL DT (Authentication Request)7.UL DT (Authentication Response)
8.Common ID
9. Security Mode Command10. Security Mode Command11. Security Mode CMP
12. Security Mode CMP13. UL DT(Setup)14. DL DT(Call proceeding)
17.RL Recfg Ready
21 RAB Assign Resp20 RB Setup Cmp19 RB Setup
16.RL Recfg Prep
18.RL Recfg Commit
22. DL DT( Alerting )23. DL DT( Connect)24. UL DT(Connect Ack)
26.RL Recfg Prep26.RL Recfg Prep
28 PhyCh Reconfig28 PhyCh Reconfig29.RL Recfg Comit29.RL Recfg Comit
27.RL Recfg Ready27.RL Recfg Ready
30 PhyCh Reconfig CMP30 PhyCh Reconfig CMP31 Meaure Control(ID3 )
32Measure Report 33 Relocation Required34 Relocation Command
35. HandoverFromUtranCommand44 Iu Release Req
46 RL Del Resp45 RL Del Req
47 Iu Release Complete
25 Measure Report(2D)
HandOver-CS_3G->2G ( 2 )UE NODEB RNC 3G MSC BSS2G MSC
35. BSSMAP Handover Request
37. MAP/E Prepare Handover Response
38. Relocation Commond
39. HandoverFromUtranCommand
41. Handover Complete
33 Relocation Required
44 Iu Release Command
46 RL Del Resp
45 RL Del Req
47 Iu Release Complete
34. MAP/E Prepare Handover
36. BSSMAP Handover Request Ack
40. BSSMAP Handover Detect
42. BSSMAP Handover Complete43. MAP/E Send End Signal
Required
48. MAP/E Send End Signal response
Measurement Control ID2-CS_3G->2G( 3 )
Measurement Control ID3-CS_3G->2G( 4 )
Measurement Report ID3-CS_3G->2G ( 5 )
HandOver&Relocation-CS_3G->2G ( 5 )
Some Record Message-CS_3G->2G ( 6 )
IU_3ghandoverto2g_sec.tmf Iub_3ghandoverto2g_sec.tmf uU_3ghandoverto2g_sec.tmf
A_handover.GMTuser_handover.UIT
HandOver -CS_2G->3GUE NODEB RNC 3G MSC BSS2G MSC
7. MAP/E Prepare Handover Response
6. Relocation Request Ack
12. Relocation Complete
10 RL Restore Ind
3 Relocation Request
1.BSSMAP Handover Request
2. MAP/E Prepare Handover
4. Radio Link Setup
5. Radio Link Setup RSP
8. MAP/E Handover Command
9. Handover to UTRAN Command
11. Handover to UTRAN Complete
16. MAP/E Send End signal response
13. MAP/E Send End Signal request 14.BSSMAP Clear Command
15.BSSMAP Clear Complete UTRAN MobilityInfo
UE Capability enquiry
UTRAN MobilityInfo Confirm
UE Capability Info
UE Capability Info Confirm
UE NODEB RNC 3G SGSN 2G SGSN
3.SGSN Context Request
1 . Cell Change Order from UTRAN
6. SGSN Context Ack
2 Route Area Update Requeset
9 Update PDP Context Request
15 Iu Release Complete
7 SRNS Data Forward Command
10 Update GPRS location
11. Cancel Location
9.Update PDP Context Response
11. Update GPRS location Ack
InterSystem Change decision
HandOver-PS_3G->2.5G
. Measure Report
GGSN HLR
4.SRNS Context Request
4.SRNS Context Responset
5.SGSN Context Responset
8 Forward Packet 8 Forward Packet
12. Cancel Location
12 Iu Release Command13 14 RL release
12 Route Area Update Accept
Message-PS_3G->2.5G
iu.tmfiub.tmfsingle u.tmf uu.tmf
RAT HandOver MML COMMAND Add GSM cell ( 1 )
MCC 移动国家号 CELL ID GSM 小区 ID
MNC 移动网络号 BSIC 基站识别码LAC 位置区号 BCCH ARFCN 绝对频率号配置命令 1 : ADD GSMCELL: MCC="460", MNC="07", LAC="0001", CID="0011", NCC=1, BCC=3, BCCHARFCN=19, ANDIND=DCS1800_BAND_USED,RATCELLTYPE=GSM;
GSM cell’s Data ( 2 )CGI : Cell Global Identification
MCC | MNC | LAC | CI |
Location Area Identification Cell Global Identification
• Identify unique GSM
BSIC: Base Station Identify Code , 由 NCC 和 BCC 构成;| NCC | BCC |
3 bits 3 bits
• MS can use it to distinguish cells with the same BCCH frequence ;• Network can distinguish cells when received report ;
GSM cell’s Data ( 3 )ARFCN : Absolute Radio Frequency Channel Number
P-GSM 900 Fl(n)=890+0.2*n 1<=n<=124 Fu(n)=Fl(n)+45
E-GSM 900 Fl(n)=890+0.2*n 0<=n<=124 Fu(n)=Fl(n)+45
Fl(n)=890+0.2*(n-1024) 975<=n<=1023
DCS 1800 Fl(n)=1710.2+0.2*(n-
512)
512<=n<=885 Fu(n)=Fl(n)+95
Fl (n) : the frequency value of the carrier ARFCN n in the lower band, Fu(n) : the corresponding frequency value in the upper band
RAT HandOver MML COMMAND ( 4 )
SET INTERFREQHO (Object RNC )
MOD CELLINTERFREQHO (Object Cell)
SET INTERRATHO (Object RNC)
MOD CELLINTERRATHO (Object Cell)
RAT HandOver Parameters
Tuse2d ( Pcpich Rscp dBm) : -95dBm
CIO : 5dB
Inter-RAT handover trigger time : 1s
GsmRSSI Threshold : -95 dBm
Reference
3GPP TS 25.304: "UE Procedures in Idle Mode and Procedures for Cell Reselection in
Connected Mode".
3GPP TS 25.331: "Radio Resource Control (RRC); protocol specification".
3GPP TS 23.060: "General Packet Radio Service (GPRS); Service description; Stage
2".
3GPP TS 03.03: "Digital cellular telecommunications system (Phase 2+); Numbering,
addressing and identification"
3GPP TS 05.05: "Digital cellular telecommunications system (Phase 2+); Radio
transmission and reception".
系统间互操作白皮书终稿 _ 注释 Nokia 3G and GSM Roaming and Handover
NOKIA 测试指导书 WCDMA 与 GSM 系统间漫游及其切换原理分析报告 关于 WCDMA 、 GSM 并网运行的方案考虑 _ 移机不换号
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