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ETSI TS 123 179
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ETSI TS 123 179 LTE; Functional architecture and information flows to support mission critical communication services; Stage 2 (3GPP TS 23.179 version 13.5.0 Release 13)
standard by European Telecommunications Standards Institute, 03/01/2017
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Full Description
ETSI TS 123 179 specifies the functional architecture, procedures and information flows needed to support the missioncritical push to talk (MCPTT) service including the common services core architecture for identity management, groupmanagement, and configuration management required to support the MCPTT voice service. Support for both MCPTTgroup calls and MCPTT private calls operating in on-network and off-network modes of operation is specified.The corresponding service requirements are defined in 3GPP TS 22.179 [2].
The present document is applicable primarily to MCPTT voice service using E-UTRAN access based on the EPCarchitecture defined in 3GPP TS 23.401 [9]. Certain MCPTT functions such as dispatch and administrative functionscould also be supported via non-3GPP access networks but no additional functionality is specified to support non-3GPPaccess.
The MCPTT service requires preferential handling compared to normal telecommunication services e.g. in support ofpolice or fire brigade including the handling of prioritised MCPTT calls for emergency and imminent threats.
The MCPTT service can be used for public safety applications and also for general commercial applications e.g. utilitycompanies and railways.
In the present document, MCPTT calls between MCPTT users on different MCPTT systems are considered, however,for roaming only EPC-level roaming and IMS-level roaming are considered i.e. partner MCPTT system based roaming(also known as "migration") is out of scope.