13 Roles for release of collaborative session for inter-UE transfer

24.3373GPPIP Multimedia (IM) Core Network (CN) subsystem IP Multimedia Subsystem (IMS) inter-UE transferRelease 17Stage 3TS

13.1 Introduction

This clause specifies the roles of controller UE, controllee UE and the SCC AS when controller UE or the remote UE releases the collaborative session.

13.2 SC UE

13.2.1 Procedures for collaborative session release by controller UE

13.2.1.1 Controller UE

There are no specific procedures for the controller UE for the collaborative session release besides the procedures described in 3GPP TS 24.229 [7].

13.2.1.2 Controllee UE

There are no specific procedures for the controllee UE for the collaborative session release besides the procedures described in 3GPP TS 24.229 [7].

13.2.2 Procedures for collaborative session release by remote party

13.2.2.1 Controller UE

There are no specific procedures for the controller UE for the collaborative session release besides the procedures described in 3GPP TS 24.229 [7].

13.2.2.2 Controllee UE

There are no specific procedures for the controllee UE for the collaborative session release besides the procedures described in 3GPP TS 24.229 [7].

13.3 SCC AS

13.3.1 Procedures for collaborative session release by controller UE

When the SCC AS receives a SIP BYE request from the controller UE for releasing a collaborative session, the SCC AS shall send a SIP BYE request according to the procedures described in 3GPP TS 24.229 [7] to the remote UE and to all controllee UEs within that collaborative session.

13.3.2 Procedures for collaborative session release by remote party

When the SCC AS receives a SIP BYE request from the remote party for releasing a collaborative session, the SCC AS shall send a SIP BYE request according to the procedures described in 3GPP TS 24.229 [7] to the controller UE and to all controllee UEs within that collaborative session.