The objective of this technical report is to study and identify solutions suitable for interworking between LTE mission critical systems and non-LTE mission critical systems that satisfy the MCPTT requirements in TS 22.179 and the MCData requirements in TS 22.282 (SDS only).
The present document refers to an IWF entity as an editorial convenience. The structure and functionality of the IWF is out of scope of the present document. The definition of IWF-1 and interactions with IWF-1 by the MCPTT system and the definition of IWF-2 and interactions with IWF-2 by the MCData (SDS only) are in scope of the present document.
The following documents contain provisions which, through reference in this text, constitute provisions of the present document.
References are either specific (identified by date of publication, edition number, version number, etc.) or non specific.
For a specific reference, subsequent revisions do not apply.
For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same release as the present document.
For the purposes of the present document, the terms and definitions given in TR 21.905 and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905.
A means of communication between mission critical systems and LMR systems whereby MC users obtaining service from a mission critical system can communicate with LMR users who are obtaining service from one or more LMR systems.
Adapts LMR Systems to mission critical systems via the IWF interface and supports interworking between LMR systems and mission critical systems.
A group, which is composed of group members from MCPTT system and LMR system and defined in MCPTT system or LMR system.
The collection of applications, services, and enabling capabilities required to provide LMR service for a mission critical organization. The term LMR system is defined for discussion purposes only and is out of scope of the present specification.
A user of an LMR service, who has a device with the capability to participate in legacy LMR services. The term LMR user is defined for discussion purposes only and is out of scope of the present specification.
Temporary interworking group:
A group created by regrouping groups from MCPTT system and LMR system.
For the purposes of the present document, the abbreviations given in TR 21.905 and the following apply.
An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in TR 21.905.