17 Optimal Media Routeing

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

17.1 General

Based on inter-operator agreement, the Optimal Media Routeing (OMR) procedures may be supported over the II-NNI.

If OMR procedures are supported, the procedures in 3GPP TS 29.079 [148] shall be applied and the capabilities below shall be provided at the II-NNI.

17.2 OMR related SDP attributes

The "visited-realm", "secondary-realm", "omr-codecs", "omr-m-att", "omr-s-att", "omr-m-bw", "omr-s-bw", "omr-s-cksum", and "omr-m-cksum" SDP attributes defined in 3GPP TS 24.229 [5] shall be supported at the II-NNI.

17.3 IP realm names

Operators need to agree on unique names for IP realms (as defined in 3GPP TS 29.079 [148]) used in their own and interconnecting networks to avoid a collision of IP realm names. Operators may choose to share an IP realm, and shall then also assign a single unique name to that realm. As defined in 3GPP TS 24.229 [5], a public IPv4 or IPv6 address reachable from the open internet is associated with the special realm "IN".