26 Resource sharing

29.1653GPPInter-IMS Network to Network Interface (NNI)Release 18TS

Based on inter-operator agreement, resource sharing may be supported over the II-NNI.

If resource sharing is supported, the related procedures from the 3GPP TS 24.229 [5] shall be applied with the requirements in this clause.

The Resource-Share header field shall be supported on the roaming II-NNI in the following SIP requests and SIP responses:

– the ACK request, the INVITE request, the PRACK request, the REGISTER and UPDATE;

– 18x responses to the INVITE request; and

– 2xx responses to the PRACK request, INVITE request and the UPDATE request.