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WCDMAWCDMAWCDMAWCDMA HOHOHOHO CallCallCallCall FlowsFlowsFlowsFlows
By Justin MA Created: June 2014 Updat...
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-RNC
Radio Link Addition (Branch Addition)
Iur
8888/25/25/25/25
UE Node B
Drift RNS
Drift
RNC
Serving
RNC
DCH -FPDCH -FP
8. Downlink Synchronisation
RNSAP RNSAP
1. Radio...
9999/25/25/25/25
Soft HO in Inter-RNC
Radio Link Deletion (Branch Deletion)
Iur
10101010/25/25/25/25
UE Node B
Drift RNS
Drift
RNC
Serving
RNC
RRCRRC
2. DCCH : Active Set Update Complete
Decision to del...
11111111/25/25/25/25
Soft HO in Inter-RNC
Radio 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
RNSAPRNSAP
1. Radio Link
Setup Request
Note 1Note 1Note 1Note 1
UE Node...
19191919/25/25/25/25
Service based UTRAN to GSM/BSS Intersystem Handover
UE RNC 3G MSC 2G MSC BSC
6. Relocation Required
R...
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:
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UMTS/WCDMA Call Flows for Handovers

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Published on

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 majachang@gmail.com.

Thanks for your reading!

Published in: Technology, Business

UMTS/WCDMA Call Flows for Handovers

  1. 1. 1111/25/25/25/25 WCDMAWCDMAWCDMAWCDMA HOHOHOHO CallCallCallCall FlowsFlowsFlowsFlows By Justin MA Created: June 2014 Updated: 2014_0801 Change History: 2014_0801: Modify the SRNS Relocation Picture notation in NSN.
  2. 2. 2222/25/25/25/25
  3. 3. 3333/25/25/25/25 Soft HO after E1A (Intra-RNC) Ref: Huawei
  4. 4. 4444/25/25/25/25 Soft HO after E1B (Intra-RNC) Ref: Huawei
  5. 5. 5555/25/25/25/25 Hard HO in Intra-RNC moving Ref: Huawei
  6. 6. 6666/25/25/25/25 Soft HO in Inter-RNC moving Ref: Huawei DRNC DRNC
  7. 7. 7777/25/25/25/25 Soft HO in Inter-RNC Radio Link Addition (Branch Addition) Iur
  8. 8. 8888/25/25/25/25 UE Node B Drift RNS Drift RNC Serving RNC DCH -FPDCH -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 RRCRRC 11. DCCH : Active Set Update Complete RRCRRC 10. DCCH : Active Set Update [Radio Link Addition] ALCAP Iur Bearer Setup5. ALCAP Iub Bearer Setup DCH -FPDCH -FP 9. Uplink Synchronisation RNSAP RNSAP 7. Radio Link Restore Indication NBAP NBAP 6. Radio Link Restore Indication Ref: TR 25.931 Iur
  9. 9. 9999/25/25/25/25 Soft HO in Inter-RNC Radio Link Deletion (Branch Deletion) Iur
  10. 10. 10101010/25/25/25/25 UE Node B Drift RNS Drift RNC Serving RNC RRCRRC 2. DCCH : Active Set Update Complete Decision to delete old RL RNSAP RNSAP 3. Radio Link Deletion Request NBAP NBAP 4. Radio Link Deletion Request RNSAP RNSAP 6. Radio Link Deletion Response NBAP NBAP 5. Radio Link Deletion Response Stop RX and TX RRCRRC 1. DCCH : Active Set Update [Radio Link Deletion] ALCAP Iur Bearer Release7. ALCAP Iub Bearer Release Ref: TR 25.931 Iur
  11. 11. 11111111/25/25/25/25 Soft HO in Inter-RNC Radio Link Replacing Ref: TR 25.931 Iur
  12. 12. 12121212/25/25/25/25 Hard HO in Inter-RNC Ref: Huawei IurIurIurIur
  13. 13. 13131313/25/25/25/25 Ref: Huawei
  14. 14. 14141414/25/25/25/25 SRNS Relocation for CS (UE-not-involved) Ref: NSN Iur
  15. 15. 15151515/25/25/25/25 SRNS Relocation for CS (UE-involved) Ref: NSN Iur
  16. 16. 16161616/25/25/25/25 SRNS Relocation for PS (UE-not-involved) Ref: NSN Iur
  17. 17. 17171717/25/25/25/25 SRNS Relocation for PS (UE-involved) Ref: NSN Iur
  18. 18. 18181818/25/25/25/25 Inter-Frequency Hard Handover RNSAPRNSAP 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 NBAP3. 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 RNSAP17. 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 RNSAP13. Radio Link Deletion Request Note 2Note 2Note 2Note 2 RNSAP NBAP NBAP 8. Radio Link Failure Indication RNSAP RNSAP9. Radio Link Failure Indication Note 2Note 2Note 2Note 2 NBAP NBAP10. Radio Link Restore Indication RNSAP 11. RL Restore Indication Note 1Note 1Note 1Note 1 RNSAP Ref: TR 25.931 Iur
  19. 19. 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
  20. 20. 20202020/25/25/25/25 iRAT-CS-HO WCDMA to GSM Ref: Huawei
  21. 21. 21212121/25/25/25/25 Ref: Ericsson
  22. 22. 22222222/25/25/25/25 3G to 2.5G Cell Change Order Ref: Tekcomms
  23. 23. 23232323/25/25/25/25 Ref: Ericsson
  24. 24. 24242424/25/25/25/25 Intra-RNC-Inter-NodeB-Inter-Frequency Hard HO f1
  25. 25. 25252525/25/25/25/25 Ref:

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