Content for TS 24.581 Word version: 18.4.0
6.3 Transmission control server procedures
6.3.1 General
6.3.2 Controlling MCVideo function procedures at MCVideo call initialization
6.3.3 MCVideo transmission control procedures at MCVideo call release
6.3.4 Transmission control server state transition diagram for general transmission control operation
6.3.5 Transmission control server state transition diagram for basic transmission control operation towards the transmission participant
6.3.6 Transmission control server state transition for general reception control
6.3.7 Transmission control server state transition for basic reception control operations towards the transmission participant
6.4 Participating MCVideo function transmission control procedures
6.5 Non-controlling MCVideo function of an MCVideo group
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6.3 Transmission control server procedures p. 52
6.3.1 General p. 52
6.3.2 Controlling MCVideo function procedures at MCVideo call initialization p. 52
6.3.2.1 General p. 52
6.3.2.2 Initial procedures p. 52
6.3.2.3 Switching from a non-controlling MCVideo function mode to a controlling MCVideo function mode p. 53
6.3.3 MCVideo transmission control procedures at MCVideo call release p. 53
6.3.4 Transmission control server state transition diagram for general transmission control operation p. 54
6.3.4.1 General p. 54
6.3.4.2 State: 'Start-stop' p. 56
6.3.4.3 State: 'G: Transmit Idle' p. 56
6.3.4.3.1 General p. 56
6.3.4.3.2 Enter the 'G: Transmit Idle' state p. 56
6.3.4.3.3 Receive Transmission Media Request message (R: Transmission Media Request) p. 57
6.3.4.3.4 Timer T2 (Transmit Idle) expired p. 58
6.3.4.3.5 Timer T1 (Inactivity) expired p. 58
6.3.4.3.6 Receive an implicit Transmission request (R: Implicit Transmission request) p. 58
6.3.4.4 State: 'G: Transmit Taken' p. 59
6.3.4.4.1 General p. 59
6.3.4.4.2 Enter the 'G: Transmit Taken' state p. 59
6.3.4.4.5 Receive RTP media packets (R: RTP media) p. 59
6.3.4.4.6 Receive Transmission End Request message (R: Transmission End Request) p. 60
6.3.4.4.7A Receive Transmission Media Request message without pre-emptive priority (R: Transmission Media Request) p. 60
6.3.4.4.7 Receive Transmission Media Request message with pre-emptive priority (R: pre-emptive Transmission Media Request) p. 61
6.3.4.4.8 Receive Transmission request message from permitted transmission participant (R: Transmission Media Request) p. 61
6.3.4.4.9 Timer T4 (Transmission Grant) expired p. 61
6.3.4.4.10 Timer T4 (Transmission Grant) expired N times p. 62
6.3.4.4.11 Permitted MCVideo client release (R: client release) p. 62
6.3.4.4.12 Receive an implicit Transmission request (R: Implicit Transmission request) p. 62
6.3.4.4.13 Send Transmission End Request message (S: Transmission End Request) p. 63
6.3.4.5 State: 'G: pending Transmission Revoke' p. 63
6.3.4.5.1 General p. 63
6.3.4.5.2 Enter the 'G: pending Transmission Revoke' state p. 63
6.3.4.5.3 Receive RTP media packets (R: RTP media) p. 63
6.3.4.5.4 Receive Transmission End Request message (R: Transmission End Request) p. 64
6.3.4.5.5 Void
6.3.4.5.6 Void
6.3.4.5.7 Receive Transmission End Response message (R: Transmission End Response) p. 64
6.3.4.6 In any state p. 65
6.3.4.7 State: 'Releasing' p. 65
6.3.5 Transmission control server state transition diagram for basic transmission control operation towards the transmission participant p. 65
6.3.5.1 General p. 65
6.3.5.2 State: 'Start-stop' p. 67
6.3.5.2.1 General p. 67
6.3.5.2.2 SIP Session initiated p. 67
6.3.5.3 State: 'U: not permitted and Transmit Idle' p. 70
6.3.5.3.1 General p. 70
6.3.5.3.2 Enter state 'U: not permitted and Transmit Idle' p. 70
6.3.5.3.3 Void
6.3.5.3.4 Receive Transmission Media Request message (R: Transmission Media Request) p. 70
6.3.5.3.5 Send Transmission Grant message (S: Transmission Grant) p. 70
6.3.5.3.6 Send Transmission Reject message (S: Transmission Reject) p. 71
6.3.5.3.7 Receive Transmission End Request message (R: Transmission End Request) p. 71
6.3.5.3.8 Receive RTP media packets (R: media) p. 71
6.3.5.3.9 Receive an implicit Transmission request (R: Implicit Transmission request) p. 72
6.3.5.3.10 Send Transmission Idle message (S: Transmit Idle) p. 72
6.3.5.4 State 'U: not permitted and transmit taken' p. 72
6.3.5.4.1 General p. 72
6.3.5.4.2 Enter state 'U: not permitted and Transmit Taken' p. 72
6.3.5.4.3 Send Transmission Idle message (S: Transmit Idle) p. 73
6.3.5.4.4 Receive Transmission Media Request message (R: Transmission Media Request) p. 73
6.3.5.4.5 Receive Transmission End Request message (R: Transmission End Request) p. 76
6.3.5.4.6 Receive RTP media packets (R: media) p. 78
6.3.5.4.7 Send Transmission Queue Position Info message (R: Transmission Queue Position Request) p. 78
6.3.5.4.8 Receive an implicit Transmission request (R: Implicit Transmission request) p. 78
6.3.5.4.9 Send Transmission Grant message (S: Transmission Grant) p. 78
6.3.5.4.10 Send Media Transmission Notification message (S: Media Transmission Notification) p. 79
6.3.5.5 State: 'U: permitted' p. 79
6.3.5.5.1 General p. 79
6.3.5.5.2 Enter state 'U: permitted' p. 79
6.3.5.5.3 Receive Transmission End Request message (R: Transmission End Request) p. 79
6.3.5.5.3a Send Transmission End Response message (S: Transmission End Response) p. 80
6.3.5.5.4 Send Transmission Idle message (S: Transmit Idle) p. 80
6.3.5.5.5 Send Transmission Revoke message (S: Transmission Revoke) p. 80
6.3.5.5.6 Receive RTP media packets (R: media) p. 80
6.3.5.5.7 Receive Transmission Media Request message (R: Transmission Media Request) p. 80
6.3.5.5.8 Send RTP Media (S: media) p. 80
6.3.5.5.9 Send Media Transmission Notification message (S: Media Transmission Notification) p. 80
6.3.5.5.10 Send Transmission End Request message (S: Transmission End Request) p. 81
6.3.5.6 State: 'U: pending Transmit Revoke' p. 81
6.3.5.6.1 General p. 81
6.3.5.6.2 Enter state 'U pending Transmit Revoke' p. 81
6.3.5.6.3 Timer T3 (Transmission Revoke) expired p. 81
6.3.5.6.4 Receive RTP media packets (R: media) p. 81
6.3.5.6.5 Receive Transmission End Request message (R: Transmission End Request) p. 82
6.3.5.6.5a Send Transmission End Response message (S: Transmission End Response) p. 82
6.3.5.6.6 Send Transmission Idle message (S: Transmit Idle) p. 82
6.3.5.6.7 Send Media Transmission Notification message (S: Media Transmission Notification) p. 82
6.3.5.6.8 Receive Transmission End Response message (R: Transmission End Response) p. 83
6.3.5.7 State 'U: not permitted but sends media' p. 83
6.3.5.7.1 General p. 83
6.3.5.7.2 Enter state 'U: not permitted but sends media' p. 83
6.3.5.7.3 Timer T3 (Transmission Revoke) expired p. 83
6.3.5.7.4 Receive Transmission End Request message (R: Transmission End Request) p. 84
6.3.5.8 In any state p. 84
6.3.5.9 State: 'Releasing' p. 85
6.3.6 Transmission control server state transition for general reception control p. 85
6.3.6.1 General p. 85
6.3.6.2 State: 'Start-stop' p. 86
6.3.6.3 State: 'Gr: Reception Idle' p. 87
6.3.6.3.1 General p. 87
6.3.6.3.2 Enter the 'Gr: Reception Idle' state p. 87
6.3.6.3.3 Receive Media Transmission Notification message (R: Media Transmission Notification) p. 87
6.3.6.3.4 Void
6.3.6.3.5 Timer T5 (Reception Inactivity) expired p. 88
6.3.6.3.6 Reception of Receive Media Request message (R: Receive Media Request) p. 88
6.3.6.3.7 Receive RTP media (R: RTP media) p. 89
6.3.6.3.8 Receive Transmission End Notify message (R: Transmission End Notify) p. 89
6.3.6.3.9 Timer T11(Stream Reception Idle) expired p. 89
6.3.6.4 State: 'Gr: Reception accepted' p. 89
6.3.6.4.1 General p. 89
6.3.6.4.2 Enter the 'Gr: Reception Accepted' state p. 89
6.3.6.4.3 Reception of Receive Media Request message (R: Receive Media Request) p. 89
6.3.6.4.4 Reception of Receive Media End Request message (R: Receive Media End Request) p. 90
6.3.6.4.5 Reception of Receive Media End Response message (R: Receive Media End Response) p. 90
6.3.6.4.6 Void
6.3.6.4.7 Receive RTP media (R: RTP media) p. 91
6.3.6.4.8 Timer T6 (Reception Granted) expires p. 91
6.3.6.4.9 Timer T6 (Reception Granted) expired N times p. 91
6.3.6.4.10 Receive Media Transmission Notification message (R: Media Transmission Notification) p. 91
6.3.6.4.11 Receive Transmission End Notify message (R: Transmission End Notify) p. 92
6.3.6.4.12 Timer T11(Stream Reception Idle) expired p. 92
6.3.6.5 State: 'Gr: Any state' p. 92
6.3.6.6 State: 'Gr: Releasing' p. 93
6.3.7 Transmission control server state transition for basic reception control operations towards the transmission participant p. 93
6.3.7.1 General p. 93
6.3.7.2 State: 'Start-stop' p. 95
6.3.7.2.1 General p. 95
6.3.7.2.2 SIP Session initiated p. 95
6.3.7.3 State: 'U: not permitted to receive' p. 96
6.3.7.3.1 General p. 96
6.3.7.3.2 Enter state 'U: not permitted to receive' p. 96
6.3.7.3.3 Send Media Transmission Notification message (S: Media Transmission Notification) p. 96
6.3.7.3.4 Reception of Receive Media Request message (R: Receive Media Request) p. 97
6.3.7.3.5 Receive Media Reception End Response message (R: Media Reception End Resonse) p. 97
6.3.7.3.6 Send Receive Media Response (Granted) message (S: Receive Media Response (Granted)) p. 98
6.3.7.3.7 Send Transmission End Notify message (S: Transmission End Notify) |R15| p. 98
6.3.7.4 State: 'U: permitted to receive' p. 98
6.3.7.4.1 General p. 98
6.3.7.4.2 Enter state 'U: permitted to receive' p. 98
6.3.7.4.3 Send RTP media packets (S: RTP media) p. 98
6.3.7.4.4 Receive Media Reception End Request message (R: Media Reception End Request) p. 99
6.3.7.4.5 Send Media Transmission Notification message (S: Media Transmission Notification) p. 99
6.3.7.4.6 Send Media Reception Override Notify message (S: Media Reception Override Notify) p. 99
6.3.7.4.7 Send Transmission End Notify message (S: Transmission End Notify) p. 99
6.3.7.4.8 Send Media Reception End Request message (S: Media Reception End Request) p. 100
6.3.7.4.9 Send Media Reception End Response message (S: Media Reception End Response) p. 100
6.3.7.4.10 Reception of Receive Media Request message (R: Receive Media Request) |R15| p. 100
6.3.7.4.11 Send Receive Media Response (Granted) message (S: Receive Media Response (Granted)) |R15| p. 101
6.3.7.4.12 Receive Media Reception End Response message (R: Media Reception End Response) |R15| p. 101
6.4 Participating MCVideo function transmission control procedures p. 102
6.4.1 General p. 102
6.4.2 Receive transmission control messages p. 102
6.4.3 Receive RTP media packets (R: RTP Media) p. 102
6.4.4 Release of session p. 103
6.5 Non-controlling MCVideo function of an MCVideo group p. 103
6.5.1 General p. 103
6.5.2 The MCVideo call initialization procedure in the non-controlling MCVideo function of an MCVideo group p. 103
6.5.2.1 General p. 103
6.5.2.2 Initial procedures when a new SIP session is establishing a group session p. 104
6.5.2.3 Switching from a controlling MCVideo function mode to a non-controlling MCVideo function mode p. 104
6.5.3 The MCVideo call release procedure in the non-controlling MCVideo function of an MCVideo group p. 105
6.5.4 Floor control server interface procedures p. 106
6.5.4.1 General p. 106
6.5.4.2 Receiving a Transmission Request message p. 106
6.5.4.3 Receive Transmission Release message p. 106
6.5.4.4 Receive Queue Position Request message p. 107
6.5.4.5 Receive Transmission Control Ack message p. 107
6.5.4.6 Receive Transmission Granted message p. 107
6.5.4.7 Receive Transmission Rejected message p. 108
6.5.4.8 Receive Transmission Idle message p. 108
6.5.4.9 Receive Media Transmission Notification message p. 109
6.5.4.10 Receive Transmission Revoked message p. 110
6.5.4.11 Receive Queue Position Info message p. 110
6.5.4.12 Receive RTP media packets from controlling MCVideo function p. 110
6.5.4.13 Receive RTP media packets from an MCVideo client p. 111
6.5.4.14 MCVideo session release step 1 p. 111
6.5.4.15 MCVideo session release step 2 p. 111
6.5.4.16 Receiving a split instruction (R: Split) p. 111
6.5.5 Floor participant interface procedures p. 111
6.5.5.1 General p. 111
6.5.5.2 State: 'Start-Stop' p. 112
6.5.5.2.1 General p. 112
6.5.5.2.2 Participant invited to session p. 112
6.5.5.3 State: 'P: has no permission' p. 113
6.5.5.3.1 General p. 113
6.5.5.3.2 Receive Transmission Idle message (R: Transmission Idle) p. 113
6.5.5.3.3 Receive Media Transmission Notification message (R: Media Transmission Notification) p. 113
6.5.5.3.4 Receive Transmission Request message (R: Transmission Request) p. 113
6.5.5.3.5 Receive Transmission Granted message (R: Transmission Granted) p. 113
6.5.5.3.6 Receive Transmission Rejected message (R: Transmission Rejected) p. 113
6.5.5.3.7 Receive Queue Position Info message (R: Queue Position Info) p. 114
6.5.5.3.8 Receive Queue Position Request message (R: Queue Position Request) p. 114
6.5.5.3.9 Receive RTP media packets (R: RTP media) p. 114
6.5.5.3.10 Receive Transmission Release message (R: Transmission Release) p. 114
6.5.5.3.11 Receive split instruction (R: Split) p. 115
6.5.5.4 State: 'P: has permission' p. 115
6.5.5.4.1 General p. 115
6.5.5.4.2 Receive RTP media packets p. 115
6.5.5.4.3 Receive Transmission Release message p. 115
6.5.5.4.4 Receive Transmission Ack message p. 115
6.5.5.4.5 Receive Transmission Idle message p. 116
6.5.5.4.6 Receive Media Transmission Notification message p. 116
6.5.5.4.7 Receive Transmission Revoked message p. 116
6.5.5.4.8 Receive split instruction (R: Split) p. 116
6.5.5.5 In any state p. 117
6.5.5.5.1 General p. 117
6.5.5.5.2 Receive Transmission Ack message (R: Transmission Ack) p. 117
6.5.5.5.3 MCVideo session release step 1 (MCVideo call release - 1) p. 117
6.5.5.6 State: 'P: Releasing' p. 117
