9.4 3GPP HNB procedure – CS support
23.1393GPP3GPP system - fixed broadband access network interworkingRelease 17Stage 2TS
9.4.0 General
The CS service is provided by the serving network. Therefore, in the roaming case the HNB GW is connected to the V-PCRF and the V-PCRF connects to the BPCF via the S9a interface.
9.4.1 S15 session establishment at HNB registration
Figure 9.4.1-1: S15 Session Establishment
1) When the HNB powers on, it receives a local IP address from the BBF Access Network. HNB Local IP address assignment by BBF is out of 3GPP scope.
2) The HNB establish IPSec tunnel with SeGW as defined in TS 33.320 [15].
3) The HNB initiates the Registration to HNB GW including HNB IP address, HNB local IP address, and the UDP port number(s) if NAT/NAPT is detected per TS 25.467 [12].
4) The HNB GW initiates the establishment of the S15 session with the v/PCRF and sends the including information about the HNB such as, HNB local IP address and the UDP port number(s) if NAT/NAPT is detected.
5) The PCRF responds to the S15 session establishment request.
6) The PCRF initiates the Gateway Control session Establishment to establish Gateway Control Session and sends the HNB local IP address and optionally the UDP port number(s) if NAT/NAPT is detected to the BPCF according to TS 23.203 [4], Annex P.
9.4.2 HNB GW initiated S15 session modification
This procedure is executed when the first UE or a subsequent UE connecting to a HNB requests a CS call.
Figure 9.4.2-1: HNB GW initiated S15 session modification
NOTE: This flow does not include all the steps associated with CS call setup.
1) The UE initiates call setup to the MSC using a SETUP message.
2) The MSC sends a RAB Assignment Request message towards the HNB.
3) The HNB GW intercepts the RAB assignment message and sends the S15 session modification message to the PCRF that includes the HNB Local IP address, the UDP port number(s) if NAT/NAPT is detected and the QoS information derived from the RAB message.
4) The PCRF initiates the GW Control and QoS Rules Provisioning procedure according to TS 23.203 [4], Annex P.
5) The PCRF responds with the outcome of the authorisation request .If no resources are available then the HNB GW rejects the RAB assignment and initiates the "RAB assignment failure" procedure.
6) The HNB GW sends the RAB assignment message to the HNB.
7) The remainder of the call setup procedure completes.
9.4.3 S15 session termination
Figure 9.4.3-1: S15 session Release
1) The HNB GW initiates/receives a Deregistration request for the HNB per TS 25.467 [12].
2) The HNB GW requests S15 session termination to the PCRF.
3) The PCRF initiates the GW control session termination over S9a toward the BPCF per TS 23.203 [4], Annex P and the PCRF acknowledges the request for termination of S15 session.
9.4.4 PCRF initiated S15 session modification
Figure 9.4.4-1: PCRF initiated S15 session modification
1) The BPCF initiates Gateway Control and QoS Rule Request to report QoS Rule failure to (v)PCRF, which can be referred to the corresponding description in step 1 of TS 23.203 [4], clause P.8.4.
2) The (v)PCRF sends the S15 session modification request message to the HNB GW. The (v)PCRF includes the report identifying the QoS Rules that failed and a reason derived from the BPCF.
3) The BPCF response the S15 session modification to the (v)PCRF.
4) Based the trigger got in step 2, the HNB GW initiates the RAB modification which is outside the scope of the present document.
Annex A (informative):
Change history
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Change history |
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Date |
TSG # |
TSG Doc. |
CR |
Rev |
Cat |
Subject/Comment |
Old |
New |
|
2012-03 |
SP-55 |
– |
– |
– |
– |
MCC Editorial update to version 11.0.0 after TSG SA Approval (Release 11) |
2.0.0 |
11.0.0 |
|
2012-06 |
SP-56 |
SP-120241 |
0001 |
1 |
F |
Some corrections to the functional description and procedures |
11.0.0 |
11.1.0 |
|
2012-06 |
SP-56 |
SP-120241 |
0002 |
2 |
F |
Correction to UE reflective QoS notification |
11.0.0 |
11.1.0 |
|
2012-06 |
SP-56 |
SP-120241 |
0004 |
2 |
F |
Clarification of accounting requirement and assumptions |
11.0.0 |
11.1.0 |
|
2012-06 |
SP-56 |
SP-120241 |
0007 |
2 |
F |
Corrections on TS 23.139 |
11.0.0 |
11.1.0 |
|
2012-06 |
SP-56 |
SP-120241 |
0008 |
3 |
F |
UE local IP address update procedure for S2c case |
11.0.0 |
11.1.0 |
|
2012-06 |
SP-56 |
SP-120241 |
0016 |
1 |
F |
SeGW DL DSCP Marking for EPC Routed Traffic |
11.0.0 |
11.1.0 |
|
2012-09 |
SP-57 |
SP-120478 |
0020 |
1 |
F |
Correction to untrusted S2c procedure |
11.1.0 |
11.2.0 |
|
2012-09 |
SP-57 |
SP-120478 |
0024 |
1 |
F |
Notification of PGW IP address in case of PDN disconnection |
11.1.0 |
11.2.0 |
|
2012-09 |
SP-57 |
SP-120478 |
0027 |
– |
F |
Corrections of wrong references |
11.1.0 |
11.2.0 |
|
2012-12 |
SP-58 |
SP-120755 |
0032 |
2 |
F |
Correction to UE reflective QoS notification |
11.2.0 |
11.3.0 |
|
2013-03 |
SP-59 |
SP-130082 |
0037 |
2 |
F |
PCRF initiated S15 session modification |
11.3.0 |
11.4.0 |
|
2013-03 |
SP-59 |
SP-130082 |
0039 |
1 |
F |
Alignment of BBAI H(e)NB Local IP Address Signalling with RAN WG3 decisions |
11.3.0 |
11.4.0 |
|
2013-06 |
SP-60 |
SP-130228 |
0043 |
1 |
B |
Conclusion on S2a for P4C_TI |
11.4.0 |
12.0.0 |
|
2014-09 |
SP-65 |
SP-140425 |
0045 |
1 |
F |
Correction of figure of DSCP Marking |
12.0.0 |
12.1.0 |
|
2015-03 |
SP-67 |
SP-150109 |
0046 |
– |
F |
Corrections to BBF related references |
12.1.0 |
12.2.0 |
|
2015-12 |
SP-70 |
SP-150602 |
0047 |
1 |
F |
Removal of support of EAP-SIM |
12.2.0 |
12.3.0 |
|
2015-12 |
– |
– |
– |
– |
– |
Update to Rel-13 version (MCC) |
12.3.0 |
13.0.0 |
|
2017-03 |
– |
– |
– |
– |
– |
Update to Rel-14 version (MCC) |
13.0.0 |
14.0.0 |
|
2018-06 |
SP-80 |
– |
– |
– |
– |
Update to Rel-15 version (MCC) |
14.0.0 |
15.0.0 |
|
2020-07 |
SP-88E |
– |
– |
– |
– |
Update to Rel-16 version (MCC) |
15.0.0 |
16.0.0 |
|
2022-03 |
SP-95E |
– |
– |
– |
– |
Update to Rel-17 version (MCC) |
16.0.0 |
17.0.0 |