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Content for  TS 23.281  Word version:  17.5.0

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7.7  Transmission controlWord‑p. 119

7.7.1  Transmission control for on-network MCVideo service

7.7.1.1  General

The procedure is for providing a transmission control to MCVideo UE in an on-network case and applies for both private call and group call. Transmission control is performed by using transmission control information flows between the transmission control participant and the transmission control server.

7.7.1.2  Information flows for transmission control for on-network

7.7.1.2.1  General
When the transmission control server receives a transmit media request from the transmission control participant, it decides whether to give a grant or not. The result is informed to the requesting transmission control participant. When the transmission control participant receives a transmit media granted message, it can send video media over the uplink bearer established beforehand. The transmit media revoked message can be used as part of revoke. The transmit media queue status request can be used to know current position in the queue for media transmission.
Some transmission control information flows can also piggyback call control information flows to provide efficient call setup and clearing:
  • Call setup request is optionally carried in transmit media request (uplink); and
  • Call release request is optionally carried in media transmission release (uplink).
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7.7.1.2.2  Transmit media request
Table 7.7.1.2.2-1 describes the information flow transmit media request, from the transmission control participant to the transmission control server, which is used to request the transmit media request. This information flow is sent in unicast to the transmission control server.
Information Element Status Description
MCVideo IDMIdentity of the user whose media transmission is requested
Media identifierOIdentifies the communication, e.g. by identifying the media flow within a media multiplex, present only if media multiplexing
Media priorityOPriority of the media
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7.7.1.2.3  Transmit media grantedWord‑p. 120
Table 7.7.1.2.3-1 describes the information flow transmit media granted, from the transmission control server to the transmission control participant, which is used to indicate that a transmit media request is granted and media transmission is possible. This information flow is sent in unicast (to the granted transmission control participant).
Information Element Status Description
Media identifierOIdentifies the communication, e.g. by identifying the media flow within a media multiplex, present only if media multiplexing
Acknowledgement requiredOIndicates if acknowledgement from the transmission control participant is required
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7.7.1.2.4  Transmit media rejected
Table 7.7.1.2.4-1 describes the information flow transmit media rejected, from the transmission control server to the transmission control participant, which is used to indicate that a transmit media request is rejected. This information flow is sent in unicast (to the refused transmission control participant).
Information Element Status Description
Media identifierOIdentifies the communication, e.g. by identifying the media flow within a media multiplex, present only if media multiplexing
Rejection causeOIndicates the cause for transmit media rejection
Acknowledgement requiredOIndicates if acknowledgement from the transmission control participant is required
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7.7.1.2.5  Media transmission notification
Table 7.7.1.2.5-1 describes the information flow media transmission notification, from the transmission control server to the transmission control participant, which is used to indicate that a media transmission is available from another user. This information flow is sent in unicast (to the receiving transmission control participant).
Information Element Status Description
MCVideo IDMIdentity of the user who is transmitting the media
Media identifierOIdentifies the communication, e.g. by identifying the media flow within a media multiplex, present only if media multiplexing
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7.7.1.2.6  Receive media request
Table 7.7.1.2.6-1 describes the information flow receive media request, from the transmission control participant to the transmission control server, which is used to request the reception of the media from another user. This information flow is sent in unicast (to the transmission control server).
Information Element Status Description
MCVideo IDMIdentity of the user who is requesting the reception of the media
Source MCVideo IDMIdentify of the user who is transmitting the media
Media identifierOIdentifies the communication, e.g. by identifying the media flow within a media multiplex, present only if media multiplexing
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7.7.1.2.7  Receive media responseWord‑p. 121
Table 7.7.1.2.7-1 describes the information flow receive media response, from the transmission control server to the transmission control participant, which is used to indicate whether the media reception is possible or not. This information flow is sent in unicast (to the receiving transmission control participant).
Information Element Status Description
ResultMIndicates whether media reception is possible as per the request
Rejection causeOIndicates the cause for rejecting the media receive request
Media identifierOIdentifies the communication, e.g. by identifying the media flow within a media multiplex, present only if media multiplexing
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7.7.1.2.8  Media reception notification
Table 7.7.1.2.8-1 describes the information flow media reception notification, from the transmission control server to the transmission control participant, which is used to indicate that a media reception has been initiated to a user. This information flow is sent in unicast (to the transmitting transmission control participant).
Information Element Status Description
MCVideo IDMIdentity of the user who is receiving the media
Media identifierOIdentifies the communication, e.g. by identifying the media flow within a media multiplex, present only if media multiplexing
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7.7.1.2.9  Queue position info
Table 7.7.1.2.9-1 describes the information flow queue position info, from the transmission control server to the transmission control participant, which is used to indicate that the transmit media request is queued and the queue position to the transmit media requesting UE. The MCVideo server and the MCVideo client support queuing of the transmit media requests shall support this information flow. This information flow is sent in unicast (to the queued transmission control participant).
Information Element Status Description
Queue position infoMPosition of the queued transmit media request in the queue
Media identifierOIdentifies the communication, e.g. by identifying the media flow within a media multiplex, present only if media multiplexing
Acknowledgement requiredOIndicates if acknowledgement from the transmission control participant is required
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7.7.1.2.10  Transmission revoked
Table 7.7.1.2.10-1 describes the information flow transmission revoked, from the transmission control server to the transmission control participant, which is used to indicate that the on-going video transmission is queued and the queue position is provided or the on-going video transmission is terminated. This information flow is sent in unicast (to the queued transmission control participant).
Information Element Status Description
Revoke reasonMThe reason for revoke like queue or termination of on-going video transmission
Queue position infoO (1)Position of the queued transmit media request in the queue
Media identifierO (2)Identifies the communication, e.g. by identifying the media flow within a media multiplex, present only if media multiplexing
Acknowledgement requiredOIndicates if acknowledgement from the transmission control participant is required
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7.7.1.2.11  Queue position requestWord‑p. 122
Table 7.7.1.2.11-1 describes the information flow queue position request, from the transmission control participant to the transmission control server, which is used to request the position in the video transmission queue. The MCVideo server and the MCVideo client support queuing of the transmission control requests shall support this information flow. This information flow is sent in unicast to the transmission control server.
Information Element Status Description
Media identifierOIdentifies the communication, e.g. by identifying the media flow within a media multiplex, present only if media multiplexing
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7.7.1.2.12  Transmit media cancel request
Table 7.7.1.2.12-1 describes the information flow transmit media cancel request, from the transmission control participant to the transmission control server. This information flow is sent in unicast to the transmission control server.
Information Element Status Description
MCVideo IDMIdentity of the user whose media transmission is requested for cancellation
Media identifierOIdentifies the communication, e.g. by identifying the media flow within a media multiplex, present only if media multiplexing
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7.7.1.2.13  Transmit media cancel response
Table 7.7.1.2.13-1 describes the information flow transmit media cancel response, from the transmission control server to the transmission control participant. This information flow is sent in unicast to the transmission control server.
Information Element Status Description
Media identifierOIdentifies the communication, e.g. by identifying the media flow within a media multiplex, present only if media multiplexing
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7.7.1.2.14  Transmit media cancel request notify
Table 7.7.1.2.14-1 describes the information flow transmit media cancel request notify, from the transmission control server to the transmission control participant. This information flow is sent in unicast to the transmission control server.
Information Element Status Description
Media identifierOIdentifies the communication, e.g. by identifying the media flow within a media multiplex, present only if media multiplexing
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7.7.1.2.15  Transmit media end requestWord‑p. 123
Table 7.7.1.2.15-1 describes the information flow transmit media end request, from the transmission control participant to the transmission control server and from the transmission control server to the transmission control participant. This information flow is sent in unicast to the transmission control server/transmission control participant.
Information Element Status Description
MCVideo IDMIdentity of the user whose media transmission is requested to be terminated.
Media identifierOIdentifies the communication, e.g. by identifying the media flow within a media multiplex, present only if media multiplexing
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7.7.1.2.16  Transmit media end response
Table 7.7.1.2.16-1 describes the information flow transmit media end response, from the transmission control participant and the transmission control server and from the transmission control server to the transmission control participant. This information flow is sent in unicast to the transmission control server/transmission control participant.
Information Element Status Description
Media identifierOIdentifies the communication, e.g. by identifying the media flow within a media multiplex, present only if media multiplexing
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7.7.1.2.17  Remote transmit media request
Table 7.7.1.2.17-1 describes the information flow remote transmit media request, from the transmission control participant to the transmission control server. This information flow is sent in unicast to the transmission control server.
Information Element Status Description
MCVideo IDMIdentity of the user who remotely initiated the media transmission of another user.
MCVideo IDMIdentity of the user whose media transmission is requested
Media identifierOIdentifies the communication, e.g. by identifying the media flow within a media multiplex, present only if media multiplexing
Media priorityOPriority of the media
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7.7.1.2.18  Remote transmit media response
Table 7.7.1.2.18-1 describes the information flow remote transmit media response, from the transmission control server to the transmission control participant. This information flow is sent in unicast to the transmission control participant.
Information Element Status Description
Media identifierOIdentifies the communication, e.g. by identifying the media flow within a media multiplex, present only if media multiplexing
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7.7.1.2.19  Remote transmit media end requestWord‑p. 124
Table 7.7.1.2.19-1 describes the information flow remote transmit media end request, from the transmission control participant to the transmission control server. This information flow is sent in unicast to the transmission control server.
Information Element Status Description
MCVideo IDMIdentity of the user whose media transmission is requested for cancellation
Media identifierOIdentifies the communication, e.g. by identifying the media flow within a media multiplex, present only if media multiplexing
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7.7.1.2.20  Remote transmit media cancel response
Table 7.7.1.2.20-1 describes the information flow transmit media end response, from the transmission control server to the transmission control participant. This information flow is sent in unicast to the transmission control server.
Information Element Status Description
Media identifierOIdentifies the communication, e.g. by identifying the media flow within a media multiplex, present only if media multiplexing
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7.7.1.2.21  Media reception end request
Table 7.7.1.2.21-1 describes the information flow media reception end request, from the transmission control server to the transmission control participant and from the transmission control participant to the transmission control server.
Information Element Status Description
MCVideo IDMIdentity of the user whose media receipt is requested for cancellation
Media identifierMIdentifies the communication, e.g. by identifying the media flow within a media multiplex, present only if media multiplexing
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7.7.1.2.22  Media reception end response
Table 7.7.1.2.22-1 describes the information flow media reception end response, from the transmission control server to the transmission control participant and from the transmission control participant to the transmission control server.
Information Element Status Description
Media identifierMIdentifies the communication, e.g. by identifying the media flow within a media multiplex, present only if media multiplexing
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7.7.1.2.23  Media reception override notificationWord‑p. 125
Table 7.7.1.2.23-1 describes the information flow media reception override notification, from the transmission control server to the transmission control participant.
Information Element Status Description
MCVideo IDMIdentity of the user who is requesting the reception of the media
MCVideo IDOIdentify of the user of the overriding media
Media identifierMIdentifies the communication of overriding media, e.g. by identifying the media flow within a media multiplex, present only if media multiplexing
MCVideo IDOIdentify of the user of the overridden media
Media identifierMIdentifies the communication of overridden media, e.g. by identifying the media flow within a media multiplex, present only if media multiplexing
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7.7.1.2.24  Transmit media end notify
Table 7.7.1.2.24-1 describes the information flow transmit media end notify, from the transmission control server to the transmission control participant. This information flow is sent in unicast to the transmission control server.
Information Element Status Description
MCVideo IDMIdentity of the user whose media transmission has been released
Media identifierOIdentifies the communication, e.g. by identifying the media flow within a media multiplex, present only if media multiplexing
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