1 Scope

23.2823GPPFunctional architecture and information flows to support Mission Critical Data (MCData)Release 18Stage 2TS

This document specifies the functional architecture, procedures and information flows needed to support the Mission Critical Data (MCData) services. MCData is a suite of services which utilizes the common functional architecture defined in 3GPP TS 23.280 [5] to support MC services over LTE including the common services core.

MCData services suite consists of the following sub-services:

– short data service (SDS);

– file distribution (FD);

– data streaming (DS); and

NOTE: Procedures for DS are not covered in the current specification.

– IP connectivity.

MCData features include:

– conversation management;

– transmission and reception control;

– communication release; and

– enhanced status.

The corresponding service requirements are defined in 3GPP TS 22.282 [3] and 3GPP TS 22.280 [2].

The present document is applicable primarily to MCData service using E-UTRAN access based on the EPC architecture defined in 3GPP TS 23.401 [4]. Certain application functions of the MCData service could also be supported via non-3GPP access networks but no additional functionality is specified to support non-3GPP access.

The MCData service can be used for public safety applications and also for general commercial applications e.g. utility companies and railways.