4 Description of Optimal Routing

22.0793GPPService definitionStage 1Support of Optimal Routeing (SOR)TS

Support of Optimal Routing (SOR) is a network feature which enables the calls directed to a mobile subscriber to be routed directly to the mobile subscriber’s actual location, or to her forwarded-to destination (instead of via the HPLMN or in the case of Late Call Forwarding via the VPLMN).

The IPLMN handling the call shall decide whether or not to optimise the routing of the call taking into account information provided by the called mobile subscriber’s HPLMN. For given subscribers, as a network option, the HPLMN may permit or deny OR on a per call basis.