umts/wcdma call flows for handovers
DESCRIPTION
It is a handbook of UMTS/WCDMA call flows for Handovers. This document is originally edited by Justin MA and it is free to share to everyone who are interested. All reference/resource are from internet. If there is any copy-right issue, please kindly inform Justin by [email protected]. Thanks for your reading!TRANSCRIPT
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WCDMAWCDMAWCDMAWCDMA HOHOHOHO CallCallCallCall FlowsFlowsFlowsFlowsBy Justin MA Created: June 2014 Updated: 2014_0801Change History:2014_0801: Modify the SRNS Relocation Picture notation in NSN.
2222/25/25/25/25
3333/25/25/25/25
Soft HO after E1A (Intra-RNC)
Ref: Huawei
4444/25/25/25/25
Soft HO after E1B (Intra-RNC)
Ref: Huawei
5555/25/25/25/25
Hard HO in Intra-RNC
moving
Ref: Huawei
6666/25/25/25/25
Soft HO in Inter-RNC
moving
Ref: Huawei
DRNC DRNC
7777/25/25/25/25
Soft HO in Inter-RNCRadio Link Addition (Branch Addition)
Iur
8888/25/25/25/25
UE Node B Drift RNS Drift RNC
Serving RNC
DCH - FP DCH - FP 8. Downlink Synchronisation
RNSAP RNSAP 1. Radio Li nk Setup Request
Start TX description
NBAP NBAP 2. Radio Link Setup
Request
RNSAP RN SAP 4. Radio Link Setup Response
NBAP NBAP 3. Radio Link Setup
Response
Start RX description
Decision to setup new RL
RRC RRC
11. DCCH : Active Set Update Complete
RRC RRC
10. DCCH : Active Set Update [Radio Link Addition]
ALCAP Iur Bearer Setup 5. ALCAP Iub Bearer Setup
DCH - FP DCH - FP 9. Uplink Synchronisation
RNSAP RNSAP 7. Radio Link Restore
Indication
NBAP NBAP 6. Radio Link Restore
Indication
Ref: TR 25.931
Iur
9999/25/25/25/25
Soft HO in Inter-RNCRadio Link Deletion (Branch Deletion) Iur
10101010/25/25/25/25
U E N ode BD rift RN S
D riftR N C
ServingR N C
R R CR R C2. D C C H : A ctive Set U pdate C om plete
D ecision to deleteo ld R L
R N SA P R N SA P
3. R adio Link D eletionR equest
N B A P N B A P
4. R adio Link D eletionR equest
R N SA P R N SA P
6. R adio Link D eletionR esponse
N B A P N B A P
5. R adio Link D eletionR esponse
Stop R X and T X
R R CR R C1. D C C H : A ctive Set U pdate
[Radio Link D eletion]
A LC A P Iur B earer R elease7 . A LC A P Iub B earer R elease
Ref: TR 25.931
Iur
11111111/25/25/25/25
Soft HO in Inter-RNCRadio Link Replacing
Ref: TR 25.931
Iur
12121212/25/25/25/25
Hard HO in Inter-RNC
Ref: Huawei
IurIurIurIur
13131313/25/25/25/25
Ref: Huawei
14141414/25/25/25/25
SRNS Relocation for CS (UE-not-involved)
Ref: NSN
Iur
15151515/25/25/25/25
SRNS Relocation for CS (UE-involved)
Ref: NSN
Iur
16161616/25/25/25/25
SRNS Relocation for PS (UE-not-involved)
Ref: NSN
Iur
17171717/25/25/25/25
SRNS Relocation for PS (UE-involved)
Ref: NSN
Iur
18181818/25/25/25/25
Inter-Frequency Hard Handover
RNSAP RNSAP
1. Radio Link Setup Request
Note 1Note 1Note 1Note 1
UE Node B
Source
Node B Target
RNC Source
RNC target
SRNC
RRC
RRC
12. DCCH : Physical Channel Reconfiguration Complete Note 3Note 3Note 3Note 3
RRC
7. DCCH : Physical Channel Reconfiguration Note 3Note 3Note 3Note 3
RRC
6. ALCAP Iur Data Transport Bearer Setup
Note 1Note 1Note 1Note 1
NBAP NBAP
2. Radio Link Setup Request
NBAP NBAP
3. Radio Link Setup Response
NBAP NBAP
14. Radio Link Deletion Request
NBAP NBAP
15. Radio Link Deletion Response
4. ALCAP Iub Data Transport Bearer Setup
16. ALCAP Iub Data Transport Bearer Release
RNSAP RNSAP
17. Radio Link Deletion Response Note 2Note 2Note 2Note 2
18. ALCAP Iur Data
Transport Bearer Release Note 2Note 2Note 2Note 2
RNSAP
5. RL Setup Response
Note 1Note 1Note 1Note 1
RNSAP
RNSAP 13. Radio Link Deletion Request
Note 2Note 2Note 2Note 2
RNS AP
NBAP NBAP
8. Radio Link Failure Indication
RNSAP
RNSAP 9. Radio Link Failure Indication
Note 2Note 2Note 2Note 2
NBAP NBAP
10. Radio Link Restore Indication
RNSAP
11. RL Restore Indication
Note 1Note 1Note 1Note 1
RNSAP
Ref: TR 25.931
Iur
19191919/25/25/25/25
Service based UTRAN to GSM/BSS Intersystem Handover
UE RNC 3G MSC 2G MSC BSC
6. Relocation Required RANAP
7. Prepare Handover MAP/E
8. Handover Request BSSMAP
9. Handover request Ack BSSMAP
10. Prepare Handover Response MAP/E
11. Relocation Command RANAP
12. Handover from UTRAN Command RRC
13. Handover Detect BSSMAP
14. Handover Complete RR
15. Handover Complete BSSMAP
16. Send End Signal Request MAP/E
17. Iu Release Command RANAP
18. Iu Release Complete RANAP
19. Send End Signal Response MAP/E
1. RAB Assignment Request [Service Handover] RANAP
4. RAB Assignment Response RANAP
2. RB setup RRC
3. RB response RRC
5. RNC decides to make handover
Radio link failure on UTRAN and radio link establishment in GSM/BSS
RANAP
RANAP
RANAP
RANAP
RANAP
RANAP
RRC
RRC
RRC
MAP/E
MAP/E
MAP/E
MAP/E
BSSMAP
BSSMAP
BSSMAP
BSSMAP
RR
Ref: TR 25.931
20202020/25/25/25/25
iRAT-CS-HO WCDMA to GSM
Ref: Huawei
21212121/25/25/25/25
Ref: Ericsson
22222222/25/25/25/25
3G to 2.5G Cell Change Order
Ref: Tekcomms
23232323/25/25/25/25
Ref: Ericsson
24242424/25/25/25/25
Intra-RNC-Inter-NodeB-Inter-Frequency Hard HO
f1
25252525/25/25/25/25
Ref: