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Mission Critical Push to Talk over LTE Realignment

Summary based on the input provided by the U.S. Department of Commerce/ FirstNet in SP-170406.

700029

Mission Critical Push to Talk over LTE Realignment

MCImp-MCPTTR

2

S1

SP-150821

This Work Item consists mostly in re-shuffling and re-organizing several sections related to Mission Critical Push to Talk into different TRs and TSs.

Re-organizing the MCPTT Stage 1 documents

See clause 6.1 above on re-organizing the MCPTT Stage 1 documents.

Overview of TS 22.179 on MCPTT Services

The main classification of MCPTT Services refers to their accessibility: they are classified as being accessible when "on-network" (i.e. they require the UE to be attached to the PLMN), when "off-network", or both.

Some MCPTT Service capabilities which are common to "on-network" and "off-network" are:

- Receiving from multiple MCPTT calls, MCPTT Private Call (with floor control) general, commencement, termination and administration capabilities, MCPTT Priority Service including MCPTT Emergency Private Call (with floor control), Location, Interaction between MCPTT Groups calls and MCPTT Private Calls (with Floor control).

Some MCPTT Service capabilities which are only "on-network" are:

- MCPTT Call commencement modes for MCPTT Group calls, Floor control including requesting permission to transmit, override, terminating permission to transmit, transmit time limit, audio cut-in for designated MCPTT Groups, Call Termination, General Group Call Administration,

- Dynamic Group management (i.e., dynamic regrouping) for group and user regrouping, Private Call with or without floor control general capabilities, Private Call with and without floor control commencement, Private Call without floor control termination, Private Call back request, MCPTT Service Priority including general, application layer priorities and call types based on priorities (MCPTT Emergency Private Call (with floor control)), Interactions for MCX Service Group and Private Communications, Audio MCPTT Call Performance (including MCPTT access time and mouth to ear latency, Late call entry performance, audio /voice quality), Ambient Listening.

- Interaction with telephony services, Interworking with non-LTE PTT systems (including P25, Tetra, and Legacy land mobile radio).

Some MCPTT Service capabilities which are only "off-network" are:

- Floor control (including general aspects, requesting permission to transmit, override, terminating permission to transmit, transmit time limit), Call Termination and MCPTT priority.

3. Mission Critical Services Common Requirements

Summary based on the input provided by the U.S. Department of Commerce/ FirstNet in SP-170407.

700028

Mission Critical Services Common Requirements

MCImp-MCCoRe

2

S1

SP-150822

Introduction

Clause 6.1 explains the relationship in Rel-14 between TS 22.179 (MCPTT), TS 22.280 (MCCoRe), TS 22.281 (MCVideo) and TS 22.282 (MCData).

This clause deals more specifically with TS 22.280, which provides the MCPTT requirements applicable by two or more mission critical services, referred to as "MCX" (Mission Critical X, with X = PTT or X = MCVideo or X = Data).

Overview of TS 22.280 on MCPTT Common Requirements

TS 22.280 follows the same overall structure as TS 22.179, the main clauses being: "on-network", "off-network" or common. TS 22.280 also specifies other types of MCX Service capabilities: Inter-MCX Service interworking, Air ground air communication and MCX Service in IOPS mode.

Some MCX service capabilities common to "on-network" and "off-network" are:

- General Group Communication, Broadcast Group Communication, Late Communication Entry, Receiving from multiple MCX Service communication, Private Communication, MCX Service Priority, MCX Service User ID, MCX UE Management and User Profile, Support for multiple devices, Location, Security and Media quality.

- Relay and Gateway capability, Control and management by Mission Critical Organizations, General administrative –groups and users, open interfaces for MCX Services, Media forwarding, Receipt notification and additional services for MCX Service communications.

Some MCX service capabilities specific to "on-network" are:

- General administrative groups and users, MCX Service communications with notification and acknowledgement for Group Communications and Queuing, General capabilities, General MCX Service Group Communications and Broadcast Group Communication.

- Dynamic Group management (i.e., dynamic regrouping), Private Communication, MCX Service Priority, IDs and aliases, MCX Service User Profile management, Support for multiple devices, Location, Security, Interactions for MCX Service Group and Private Communications, Additional Services (including Discreet and Ambient Listening, Remotely initiated Communication as well as recording and audit requirements).

- Interaction with telephony services, Interworking ( including non-3GPP access and Interworking between MCX Service systems), MCX Service coverage extension using ProSe UE-to-Network Relays and Additional MCX Services related to Communication rejection and queuing.

Some MCX service capabilities specific to "off-network" are:

- General off-network MCX Services, Admission control, Communication termination, Broadcast Group, MCX Service priority requirements, Communication types based on priority, Location, Security, Off-Network operations and UE functionality, Streaming for ProSe UE-to-UE and UE-to-Network Relay, Switching to off-network MCX Service, Off-network recording and audit, and Off-Network UE-to-UE Relay for Private and Group communications

Finally, here are some examples of Inter-MCX Service interworking requirements:

- Concurrent operation of different MCX Services, Use of un-sharable resources within a UE, Single group with multiple MCX Services, Priority between services,

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