Study on Multimedia Priority Service (MPS) for IMS Messaging and SMS services
The scope of this Technical Report is to study solutions addressing MPS priority for SMS and MPS priority for messaging services based on IMS within the 3GPP system. For IMS, the scope is limited to MPS priority by the 3GPP system when SIP is used to support the messaging service.
The study will investigate the following aspects:
- Solutions addressing how MPS for messaging services is requested and authorized using a UE with a subscription for MPS.
- Solutions addressing gaps for MPS priority treatment for messaging services using TS 23.228 [4] specified SIP MESSAGE and SIP sessions in EPC and 5GC.
- Solutions addressing gaps for MPS priority treatment in EPC and 5GC for messaging services using MO/MT SMS over IP, and MO/MT SMS over NAS. For SMS, only subscription-based priority treatment is in scope.