5.9 Iurh Setup

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

5.9.1 General

The purpose of this procedure is to setup an Iurh connection between two HNBs or between a HNB and a HNB-GW for HNB-RNC connectivity, and ensure that they have the necessary information for operation.

5.9.2 Iurh Setup for direct Iurh connectivity between HNBs

Figure 5.9.2-1: Procedure for Iurh Setup – direct Iurh connectivity.

The purpose of this procedure is to establish Iurh connectivity between two HNBs and ensure that the application level information is available to the two HNBs to interoperate correctly.

1. The HNB sets up an SCTP transport session, if required.

2. HNB₁ sends an RNA:IURH SETUP REQUEST to HNB₂.

3 If HNB₂ does not have configuration information on HNB₁, it triggers a request for the configuration information on HNB₁ from the HNB-GW.

4. HNB₂ responds to HNB₁.

5.9.3 Iurh Setup for Iurh connectivity between HNBs via the HNB-GW

Figure 5.9.3-1: Procedure for Iurh Setup-Iurh connectivity via the HNB-GW.

The purpose of this procedure is to establish Iurh connectivity between two HNBs via the HNB-GW and ensure that the application level information is available to the two HNBs to interoperate correctly.

1. HNB₁ and HNB₂ have set up an SCTP transport session towards the HNB-GW at HNB Registration if they both support Iurh connectivity via the HNB-GW and where triggered by the HNB-GW to establish a transport session to it during HNB Registration.

2. HNB₁ provides within the RNA:IURH SETUP REQUEST message information which enables the HNB-GW to route the message to the HNB₂ and to enable the HNB₂ to reply via the HNB-GW.

3 If HNB₂ does not have configuration information on HNB₁, it triggers a request for the configuration information on HNB₁ from the HNB-GW.

4. HNB₂ responds with a RNA:IURH SETUP RESPONSE to HNB₂ via the HNB-GW.

5.9.4 Iurh Setup between the HNB and the HNB-GW for HNB-RNC connectivity

Figure 5.9.4-1: Procedure for Iurh Setup – Iurh connectivity between the HNB and the HNB-GW for HNB-RNC connectivity.

The purpose of this procedure is to establish Iurh connectivity between the HNB and the HNB-GW for connectivity between the HNB and the RNC and ensure that the peer RNC is available through the Iurh interface between the HNB and the HNB-GW.

0. An Iur interface instance is established between the RNC and the HNB-GW.

1. At HNB Registration the HNB has set up an SCTP transport session towards the HNB-GW.

2. HNB sends an RNA:IURH SETUP REQUEST to the HNB-GW to establish the connectivity towards the RNC via the HNB-GW. The RNC ID included in the RNA message identifies the peer RNC.

3. HNB-GW responds with an RNA:IURH SETUP RESPONSE to HNB if the Iur interface between the HNB-GW and the peer RNC is available.