10.11 Location

23.2833GPPMission Critical Communication Interworking with Land Mobile Radio SystemsRelease 18TS

10.11.1 Location of current talker

3GPP TS 23.379 [7], subclause 10.6.2.7 describes a high-level procedure to provide the location of the current talker to all the receiving MCPTT users.

10.11.2 Location of current talker (MCPTT server to IWF)

Figure 10.11.2-1 shows the high-level procedure to for MCPTT service to provide the location information about the current talking user to all the receiving MCPTT users and the IWF.

Pre-conditions:

1. There is on-going group call involving MCPTT client 1 and MCPTT client 2 and the IWF.

2. MCPTT client 1 is the current talking user.

3. MCPTT server has obtained the location information of MCPTT client 1.

Figure 10.11.2-1: Providing location information of the current talker

1. MCPTT client 1 gets the floor to transmit voice media.

2. The MCPTT server checks the privacy policy (authorisation to provide location information to other MCPTT users on a call when talking, as defined in 3GPP TS 23.379 [7] Annex A.3) of the current talking MCPTT user to decide if the location information of MCPTT client 1 can be provided to other MCPTT users on the call.

3. If the privacy policy permits, the MCPTT server provides the location information of MCPTT client 1 to MCPTT client 2 and the IWF. The procedures for this are described in 3GPP TS 23.280 [5] subclause 10.9.3.6. Optionally, the location information may be provided in the floor taken message sent to MCPTT client 2 and the IWF according to 3GPP TS 23.379 [7] subclause 10.9.1.3.1, if the privacy policy permits.

10.11.3 Location of current talker (IWF to MCPTT server)

Figure 10.11.3‑1 shows the high-level procedure to for the IWF to provide the location information about the current LMR talking user to all the receiving MCPTT users.

Pre-conditions:

1. There is on-going group call involving MCPTT client 1 and MCPTT client 2 and the IWF.

2. An LMR user is the current talking user through the IWF.

NOTE: How the MCPTT server acquires the location of the LMR user is outside the scope of the present document.

Figure 10.11.3-1: Providing location information of the current talker

1. The IWF gets the floor to transmit voice media.

2. The MCPTT server checks the privacy policy (authorisation to provide location information to other MCPTT users on a call when talking, as defined in 3GPP TS 23.379 [7] Annex A.3) of the current talking IWF user to decide if the location information of the user on the IWF can be provided to other MCPTT users on the call.

3. The MCPTT server provides the location information of the IWF user to MCPTT client 1 and MCPTT client 2. The procedures for this are described in 3GPP TS 23.280 [5] subclause 10.9.3.6. Optionally, the location information may be provided in the floor taken message sent to MCPTT client 2 and the IWF according to 3GPP TS 23.379 [7] subclause 10.9.1.3.1.