7.1 General

25.4673GPPRelease 17Stage 2TSUTRAN architecture for 3G Home Node B (HNB)

Figure 7.2-1 shows the Control Plane and the User Plane protocol structures over the Iuh interface. For the control plane, the HNBAP protocol provides the signalling service between the HNB and the HNB-GW required to fulfil the functions described in TS 25.469 [3].

RUA provides the signalling service between the HNB and the HNB-GW that is required to fulfil the functions described in TS 25.468 [2].

PUA provides the signalling service between the HNB and HNB-GW that is required to fulfil the functions described in TS 25.470 [39].

The payload protocol identifier (PPI) field in SCTP (IETF RFC 4960 [6]) is set to the value 19 assigned by IANA for use with the RUA protocol. In addition, the value 20 is assigned for the PPI for HNBAP. The value 31 is assigned for the PPI for SABP. The value 55 is assigned for the PPI for PUA. The multiplexing protocol as specified in TS 25.444 [8] provides the means to multiplex CS user plane on the uplink.

The destination port number field in SCTP (IETF RFC 4960 [6]) is set to the value 29169 assigned by IANA for setup of the common SCTP association in HNBAP, RUA, PUA and SABP.

For Iurh there shall be an SCTP association for each direct Iurh interface between HNBs. For operation via the HNB-GW there shall be a single SCTP association common to all Iurh interface instances. This association shall be separate from the Iuh SCTP association established between the HNB and the HNB-GW.

The payload protocol identifier (PPI) field in IETF RFC 4960 [6] is set to the value 42 registered by IANA for the use with the RNA protocol.

The destination port number field in IETF RFC 4960 [6] is set to the value 25471 assigned by IANA for setup of the SCTP association in RNA.