Content for TR 22.953 Word version: 18.0.1

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0 Introduction p. 5

This Technical Report (TR) presents the results of the feasibility study on Multimedia Priority Service. The intent of this feasibility study is to assess the ability of 3GPP specifications to meet high-level requirements identified for Multimedia Priority Service. This feasibility study consisted of a multi-step process, namely:

Identify high-level requirements for Multimedia Priority Service.
Determine relevant 3GPP specifications for Multimedia Priority Service.
Perform a gap analysis to assess the ability of existing 3GPP specifications to meet the high-level Multimedia Priority Service requirements.

As defined in this document, Multimedia Priority Service allows qualified and authorized users to obtain priority access to the next available radio channel on a priority basis before other PLMN users during situations when PLMN congestion is blocking session establishment attempts. In addition, Multimedia Priority Service supports priority sessions an "end-to-end" priority basis.

Multimedia Priority Service is intended to be used by qualified and authorized users, i.e., emergency service personnel, only during times of emergency situations and network congestion. Access to Multimedia Priority Service is limited to key personnel and those with leadership responsibilities and is not intended for use by all emergency service personnel. This is to ensure that emergency service personnel cannot "take over" the network and deny other non-emergency service subscribers a reasonable level of service.

Multimedia Priority Service providers should adhere to uniform, nationwide operating access procedures. Multimedia Priority Service can provide significant benefits for public safety. There may be times during emergencies when non- Service Users will be unable to obtain access to their wireless services (because Multimedia Priority Service personnel are using the channels); nevertheless, the benefits of Multimedia Priority Service outweigh any inconvenience to non-Service Users.

It is assumed that Multimedia Priority Service will be available at all times in equipped markets in both the HPLMN and VPLMN within a country where the PLMN provider is offering the service. The capability for pre-emption could be supported, with the option to turn it on/off depending on regional requirements. Multimedia Priority Service is applicable to both GERAN and UTRAN and is activated on a per session basis using Multimedia Priority Service procedure described in clause 4.8.

Multimedia Priority Service, supported by the 3GPP system set of services and features, is one element in the ability to deliver calls of a high priority nature from mobile to mobile networks, mobile to fixed networks, and fixed to mobile networks.

1 Scope p. 7

Identify high-level requirements for Multimedia Priority Service.
Determine relevant 3GPP specifications for Multimedia Priority Service.
Perform a Gap Analysis to assess the ability of existing 3GPP specifications to meet the high-level Multimedia Priority Service requirements.

The present document also presents the results of the subsequent feasibility study on Multimedia Priority Service - Phase 2 for Rel-17 identifying new use cases and associated capabilities to account for current and anticipated MPS User needs for priority voice, data, and video communication capabilities. The feasibility study on Multimedia Priority Service - Phase 2 also identifies new potential requirements for the normative stage 1 requirements specified in TS 22.153.

Additional functionalities not documented in this TR are considered outside the scope of this TR. Such additional functionality may be on a network-wide basis, nation-wide basis or particular to a group of users..

The Multimedia Priority Service is intended to be utilised for both Voice and Data in the Packet-switched (PS) domain and the IP Multimedia Subsystem (IMS).

The Multimedia Priority Service is intended to interwork with external networks to provide an end-to-end service. Therefore, service interactions with external networks are considered within the scope of this document, although the specification of these interactions may be in other standards. If this occurs, a reference to that specification is made.