Tech-invite3GPPspecsSIPRFCs
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Content for  TS 22.281  Word version:  16.0.0

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5.2  MCVideo services requirements specific to on-network use

5.2.1  Video availability notification

5.2.1.1  Service description

This function aims at informing the user when there is a video file which he could be interested in. The notification might also enclose a description of the video as well as an indication of its operational importance.
In this service the video has been stored and is not part of an ongoing video transmission.

5.2.1.2  Requirements

[R-5.2.1.2-001]
An authorized MCVideo User shall be able to notify an MCVideo Group of the availability of a video.
[R-5.2.1.2-002]
An authorized MCVideo User shall be able to individually notify an MCVideo User outside an MCVideo Group that a video is available independently from any affiliation mechanism.
[R-5.2.1.2-003]
The MCVideo service shall provide a mechanism for an authorized MCVideo User to retrieve and view a video that has been identified in a notification.
[R-5.2.1.2-004]
The MCVideo availability notification may use another service (e.g. MCData).
[R-5.2.1.2-005]
The MCVideo service shall only send video notifications to MCVideo Users authorized to view the video.
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5.2.2  Replay of stored videoWord‑p. 22

5.2.2.1  Service description

This function aims at offering video tape functions for a user viewing a video as well as an opportunity to choose and view video files stored on the server.

5.2.2.2  Requirements

[R-5.2.2.2-001]
The MCVideo service shall provide an authorization mechanism for MCVideo Users and MCVideo Groups to view a remotely stored video.
[R-5.2.2.2-002]
The MCVideo service shall provide a mechanism for an authorized MCVideo User to view a video with simple video player functions (e.g. pause rewind, forward).
[R-5.2.2.2-003]
The MCVideo service shall provide a list of available and authorized videos for the MCVideo User.
[R-5.2.2.2-004]
The MCVideo service shall provide a means to associate MCVideo User authorizations to each file for viewing, modifying and/or deleting the file.
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5.2.3  Video storage control

5.2.3.1  Service description

Since mission critical video is sensitive data with varying local regulatory issues, an MCVideo system cannot allow videos to be viewed or copied by unauthorized people. As a consequence, there is a need to have a mechanism to automatically delete videos from a terminal as well as a mechanism to remotely delete videos from a terminal.

5.2.3.2  Requirements

[R-5.2.3.2-001]
The MCVideo service shall provide a means for an administrator to remotely select and delete selected videos and associated data of an MCVideo User from the MCVideo UE.
[R-5.2.3.2-002]
The MCVideo service shall provide a means by which all MCVideo data (including video related metadata) are periodically deleted from the MCVideo UE unless an action is taken by an authorized MCVideo User.
[R-5.2.3.2-003]
The deletion period shall be configurable.

5.2.4  Capabilities additional to MCCoRe

5.2.4.1  Service description

This function aims at restricting use of video services to a specific authorized MCVideo User.

5.2.4.2  Requirements

[R-5.2.4.2-001]
The MCVideo Service shall provide a mechanism for an MCVideo Administrator to restrict an MCVideo User's video communication to MCVideo use only.

5.2.5  Video control by a dispatcher

5.2.5.1  Service description

Dispatchers need advanced capabilities for managing MCVideo services for MCVideo Users and fixed cameras under their control.

5.2.5.2  RequirementsWord‑p. 23
[R-5.2.5.2-001]
The MCVideo service shall provide a mechanism for a dispatcher of an MCVideo Group to request a monitoring camera to transmit a video to the dispatcher.
[R-5.2.5.2-002]
The MCVideo service shall provide a mechanism for a dispatcher of an MCVideo Group to terminate the video transmission from the monitoring camera to the dispatcher.
[R-5.2.5.2-003]
The MCVideo service shall provide a mechanism for a dispatcher of an MCVideo Group to request a monitoring camera to transmit a video to an authorized user.
[R-5.2.5.2-004]
The MCVideo service shall provide a mechanism for a dispatcher of an MCVideo Group to terminate the video transmission from the monitoring camera to the authorized user.
[R-5.2.5.2-005]
The MCVideo service shall provide a mechanism for a dispatcher to distribute a video to MCVideo Group Members.
[R-5.2.5.2-006]
The MCVideo service shall provide a mechanism for a dispatcher to terminate the video distribution to MCVideo Group Members.
[R-5.2.5.2-007]
The MCVideo service shall provide a mechanism for a dispatcher or an authorized user to build a mosaic from different video sources and transmit this mosaic in an MCVideo group communication.
[R-5.2.5.2-008]
The MCVideo Service shall provide a means to obtain the video display capabilities available for an MCVideo User.
[R-5.2.5.2-009]
The MCVideo service shall provide a mechanism to ensure that a target MCVideo User is able to watch a mosaic video before transmission to the user begins.
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5.2.6  Transmission control

5.2.6.1  Overview

MCVideo provides a method of working where each video being sent is delivered as an invitation to the affiliated group members for them to elect to commence receiving or not as suits their situation. It is far better not to send video to a user who is unable to view it. Conflicting or simultaneous video communications would result in simultaneous (or near simultaneous) invitations to join and the users can choose which video communication, if any, to join. Forced reception of video can be configured by an authorised user. In this case, suitably authorised receiving users could be permitted to opt out of viewing, perhaps because they have a specific task to watch some other stream.
As a consequence a video group communication can allow the user to accept the video stream before receiving a video and can allow the user to choose from available video streams amongst a list of ongoing video streams available to the user.
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5.2.6.2  Transmission control requirements

5.2.6.2.1  General
[R-5.2.6.2.1-001]
The MCVideo service shall determine which Participant(s) are allowed to transmit a video stream.
[R-5.2.6.2.1-002]
An authorized Participant shall be able to request to transmit to an MCVideo Group or an individual.
[R-5.2.6.2.1-003]
When a request to transmit a video stream to an MCVideo Group is granted the MCVideo service shall send an invitation to all affiliated members of the selected group to allow them to accept to receive the video.
[R-5.2.6.2.1-004]
An MCVideo Group shall have the flexibility to be configured to allow simultaneous transmitting MCVideo Group Members.
[R-5.2.6.2.1-005]
MCVideo service shall provide a mechanism for the MCVideo Administrator to configure the maximum number of simultaneous transmissions in a single MCVideo Group.
[R-5.2.6.2.1-006]
The MCVideo service shall determine who is allowed to transmit when there are requests to transmit more than the maximum number of simultaneous communications within the same group.
[R-5.2.6.2.1-007]
The MCVideo service may withhold permission to transmit for service based pre-emptive capacity reasons.
[R-5.2.6.2.1-008]
Following an MCVideo service request for permission to transmit on the Selected MCVideo Group, the Affiliated MCVideo Group Member that made and was granted the request shall be given an indication of being granted permission to transmit.
[R-5.2.6.2.1-009]
Following an MCVideo Private Communication request for permission to transmit, an MCVideo User that is allowed to transmit shall be given an indication that the user is allowed to transmit to the targeted MCVideo User(s).
[R-5.2.6.2.1-010]
When a user is not allowed to start a Group communication the request may be queued or rejected.
[R-5.2.6.2.1-011]
Following an MCVideo Group service request for permission to transmit on the Selected MCVideo Group, an Affiliated MCVideo Group Member that made but was not granted the request shall be given an indication that permission to transmit was queued or rejected.
[R-5.2.6.2.1-012]
Following an MCVideo Private Communication request for permission to transmit, an MCVideo User that is not allowed to transmit shall be given an indication that the permission to transmit was queued or rejected.
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5.2.6.2.2  Receiving video streamsWord‑p. 24
[R-5.2.6.2.2-001]
When a video group communication is started using a particular MCVideo Group all affiliated group members for that same MCVideo group shall be sent an invitation notifying them of the new video stream.
[R-5.2.6.2.2-002]
The MCVideo service shall provide a mechanism to include conditions for acceptance or rejection of the invitation (e.g. forced, unforced).
[R-5.2.6.2.2-003]
In the case of unforced invitation to receive an MCVideo user shall receive the video stream of a MCVideo communication only after having accepted the invitation.
[R-5.2.6.2.2-004]
MCVideo service shall provide a mechanism for the MCVideo Administrator to configure the maximum number of simultaneous streams received by an MCVideo User.
[R-5.2.6.2.2-005]
As a configuration option, the MCVideo system shall provide a means for an authorized MCVideo user to automatically receive video communications.
[R-5.2.6.2.2-006]
As a configuration option, the MCVideo service shall provide a means for an MCVideo user to automatically receive emergency video streams.
[R-5.2.6.2.2-007]
As a configuration option, the MCVideo service shall provide a means for an authorized MCVideo user to automatically receive imminent peril video streams.
[R-5.2.6.2.2-008]
An authorised user shall be able to configure an MCVideo group to support individual user/UE opt in to receive communications or mandatory/automatic reception.
[R-5.2.6.2.2-009]
An MCVideo user shall be able to opt in to receive communications for any recently invited group communications for which the MCVideo user is affiliated.
[R-5.2.6.2.2-010]
When a video private communication is started the receiving participant shall be given the option of accepting or rejecting the communication.
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5.2.6.2.3  Entering an ongoing video streamWord‑p. 25
[R-5.2.6.2.3-001]
The MCVideo service shall provide to the MCVideo User the list of ongoing/currently transmitting video group communications, for which he is affiliated, periodically and on demand.
[R-5.2.6.2.3-002]
The MCVideo user shall be able to choose one or more video group communications subject to MCVideo settings and UE capabilities (e.g. MCVideo UE display capabilities).
[R-5.2.6.2.3-003]
The MCVideo service shall provide a means to separately control the sound of the different video communications received.
5.2.6.2.4  Video streams reconfiguration and termination
[R-5.2.6.2.4-001]
The MCVideo service shall make efficient use of resources (e.g. use of eMBMS).
[R-5.2.6.2.4-002]
The MCVideo service shall provide a notification to a transmitting MCVideo Group Member if there are no other MCVideo Group Members who have affiliated to the MCVideo Group.
[R-5.2.6.2.4-003]
The MCVideo service shall provide a notification to a transmitting MCVideo Group Member if there are no MCVideo Group Members receiving their communication.
\NOTE:
When an opt in communication is commenced, a reasonable time is allowed for other users to opt to receive the communication before such a notification is sent.
[R-5.2.6.2.4-004]
The MCVideo service may interrupt the transmission of an MCVideo communication when there is no MCVideo User receiving it.
[R-5.2.6.2.4-005]
The MCVideo service may restart the transmission of an MCVideo communication as soon as any affiliated/authorized user wants to receive the MCVideo communication.
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5.2.7  Override

5.2.7.1  Overview

For MCVideo override is possible and useful but is different from MCPTT.
MCVideo might be operated in a combined way with MCPTT. Therefore, it is likely that the sending user will have the opportunity to state what their intention is for the video that they send. In this case it might not be necessary for other regular members of the group to receive the video but the dispatcher might always receive it. In this situation, when the group invitation is sent, individual users could request to join the video if it is useful to them and convenient. Override can then be achieved by the user realising, from the MCPTT call, that another video is more important and so switching over to receive the new one.
As an alternative to the invitation approach a forced approach is still possible but a group force of a video is an unpredictable option as some users might well be unable to view the video. Forced override is still possible in MCVideo. The video is announced as an invitation but includes a forced override indication. The system makes the forced override but, depending on configuration, the user might be able to review a list of allowed continuing video streams and go back to the one they are using.
MCVideo might operate in a group way with many members of the group sending video to a dispatcher (private call) and the dispatcher periodically selecting and sending video back to the group.
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5.2.7.2  General aspects

[R-5.2.7.2-001]
The MCVideo Service shall enable an MCVideo Service Administrator to create a hierarchy for determining which Participants, Participant types, and urgent transmission types, if any, shall be granted a request to override an active MCVideo Service transmission.
[R-5.2.7.2-002]
The MCVideo Service shall enable an MCVideo Service Administrator to configure which MCVideo Service Group transmission(s) a Participant(s) receives for cases where an MCVideo Service transmission can be overridden and/or to configure to allow the Participant to select from available video streams.
[R-5.2.7.2-003]
The MCVideo service shall enable the MCVideo Service Administrator to configure the MCVideo Service Group to limit the number of Participant(s) allowed to transmit at the same time into the same group.
[R-5.2.7.2-004]
The MCVideo service shall provide a mechanism for an MCVideo Service Administrator to configure MCVideo Service Private Communications to pre-empt or not to pre-empt active received group communications.
[R-5.2.7.2-005]
Any hierarchy used for granting a request to override an active MCVideo Service transmission shall contain at least four (4) levels.
[R-5.2.7.2-006]
The transmitting Participant(s) shall be determined by the relative priorities of the Participants, number of allowed transmissions and Communication type based on configuration.
[R-5.2.7.2-007]
The MCVideo service shall provide a mechanism for Participants, to override an active MCVideo Service transmission of a transmitting Participant based on configuration.
[R-5.2.7.2-008]
If an MCVideo service transmission is overridden, the MCVideo Service shall provide a means of notifying the overridden Participant(s) that the transmission has been overridden.
[R-5.2.7.2-009]
If the MCVideo Service Group limit for the number of Participant(s) allowed to communicate at the same time into the same group would otherwise be exceeded, the MCVideo service shall revoke transmit permissions for non-emergency communications using the relative priorities of the Participants, emergency state and video mode based on configuration.
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5.2.8  Communication terminationWord‑p. 26
[R-5.2.8-001]
The MCVideo service shall enable an authorized MCVideo User to terminate the permission to transmit of a transmitting Participant at any time.
[R-5.2.8-002]
A transmitting Participant shall be able to indicate to the MCVideo service that the Participant no longer wants to transmit.
[R-5.2.8-003]
If a receiving Participant of an MCVideo Service Group Communication is pre-empted, the MCVideo Service may terminate the communication or continue the communication with an indication to the transmitting Participant that one or more receiving Participants was pre-empted.
[R-5.2.8-004]
If MCVideo User(s) are pre-empted from an on-going MCVideo service communication as there is insufficient capacity to support their on-going participation, the MCVideo service may ensure that the MCVideo User(s) receive a notification that they have been removed from the communication for reasons of lack of capacity.
[R-5.2.8-005]
The MCVideo service shall have a configurable limit for the length of time that a Participant transmits from a single request to transmit.
[R-5.2.8-006]
The MCVideo service shall enable an MCVideo Administrator to configure the limit for the length of time that a Participant transmits from a single request to transmit.
[R-5.2.8-007]
The MCVideo service may provide a notification of intent to terminate a communication e.g. to give the user time to request a time limit extension.
[R-5.2.8-008]
The MCVideo service may terminate a communication without previously sending a notification.
[R-5.2.8-009]
The MCVideo service may include an indication of termination reason (e.g. time limit, administrator action) with any notification of intent to terminate or actual termination.
[R-5.2.8-010]
An MCVideo UE shall provide, to the User, a notification of termination or intent to terminate including any reason given.
[R-5.2.8-011]
The MCVideo service may include a request for more information with any notification of intent to terminate communication.
[R-5.2.8-012]
An MCVideo UE shall respond to a request for more information.
[R-5.2.8-012a]
The response to a request for more information may include request for more time, indicate no foreseen end to the communication.
[R-5.2.8-013]
The MCVideo service shall terminate an MCVideo Service Group Communication if any termination condition is met (e.g. last Participant leaving, second last Participant leaving, initiator leaving, time limit) or the minimum number of Affiliated MCVideo Service Group Members are not present.
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5.3  MCVideo services requirements specific to off-network useWord‑p. 27

5.3.1  Private Communication Off-Network

5.3.1.1  Overview

Private Communications allow two MCVideo Users to communicate directly with each other without the use of MCVideo Groups. They leverage many of the functions and features of MCVideo Group Communication, such as MCVideo User identity and alias information, location information, encryption, privacy, priority, and administrative control. This capability establishes the ability to transmit unidirectional video between two MCVideo Users, but could be used to create a bi-directional video conferencing capability.
Two commencement modes of Private Communication are supported: Manual Commencement Private Communication and Automatic Commencement Private Communication.
Manual Commencement Private Communication mimics a telephone conversation where the receiving party receives a notification that they are being requested to join a Private Communication, and the receiving party might accept, reject, or ignore the Communication request. Once the Communication setup is accepted, the Private Communication is established.
Automatic Commencement Private Communication mimics the immediate setup and propagation of Group Communication operation between two users where the transmitting party initiates an Automatic Commencement Private Communication to another user and sends video without any additional Communication setup delay beyond Group Communication. If available and able to accept the Private Communication from the transmitting party, the receiving party immediately joins the Private Communication and processes the Communication transmitting party's video.
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5.3.1.2  Private Communication Off-Network general requirements

[R-5.3.1.2-001]
The MCVideo service shall support Private Communications Off-Network.
[R-5.3.1.2-002]
The MCVideo Service shall provide a mechanism for the Private Communication to be set up with the MCVideo UE designated by the receiving MCVideo User to be used for Private Communications when the receiving MCVideo User has signed on to the MCVideo service with multiple MCVideo UEs.

5.3.1.3  Private Communication Off-Network commencement requirements

[R-5.3.1.3-001]
The MCVideo service shall provide a mechanism for an MCVideo User to cancel an MCVideo Private Communication prior to the Communication setup.
[R-5.3.1.3-002]
The MCVideo service shall provide a means by which an authorized MCVideo User initiates an MCVideo Private Communication.
[R-5.3.1.3-003]
The MCVideo service shall provide a means by which an MCVideo UE initiates an MCVideo Private Communication to any MCVideo User for which the MCVideo UE's current MCVideo User is authorized.
[R-5.3.1.3-004]
The MCVideo service shall provide a means by which an MCVideo User initiates an Automatic Commencement Private Communication to any MCVideo User for which the MCVideo User is authorized.
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5.3.1.4  Private Communication Off-Network terminationWord‑p. 28
[R-5.3.1.4-001]
The MCVideo service shall provide a mechanism for an MCVideo User to reject an MCVideo Private Communication.
[R-5.3.1.4-002]
The MCVideo service shall provide a means by which an MCVideo User ends a Private Communication in which the MCVideo User is a Participant.

5.3.1.5  Private Communication Off-Network administration

[R-5.3.1.5-001]
The MCVideo service shall provide a mechanism for an MCVideo Administrator to configure which MCVideo Users, within their authority, are authorized to place a Manual Commencement Private Communication.
[R-5.3.1.5-002]
The MCVideo service shall provide a mechanism for an MCVideo Administrator to configure which MCVideo Users, within their authority, are authorized to place an Automatic Commencement Private Communication.
[R-5.3.1.5-003]
The MCVideo service shall provide a mechanism for an MCVideo Administrator to configure for a particular authorized MCVideo User, a set of MCVideo Users under the same authority to which an MCVideo Private Communication can be made.
[R-5.3.1.5-004]
The MCVideo service shall provide a mechanism for an MCVideo Administrator to configure the maximum duration for MCVideo Private Communications for MCVideo Users within their authority.
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5.3.2  MCVideo Transmission Control Off-Network

5.3.2.1  Overview

MCVideo Transmission Control Off-Network provides a necessary capability for an authorized user of the
MCVideo service to request to transmit, receive an indication of being allowed to transmit or not being allowed to transmit and terminate a request to transmit when the MCVideo user no longer wants to transmit. A transmit time limit is provided which allows an MCVideo Administrator to configure the limits for any transmission related to a single request to transmit. MCVideo Transmission Control Off-Network also provides an override capability based on a priority hierarchy to override an active MCVideo transmission of a transmitting Participant based on configuration.
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5.3.2.2  General Aspects

[R-5.3.2.2-001]
The MCVideo service when operating off-network shall determine at a point in time which off-network Participant(s) are allowed to transmit to other off-network Participants.
[R-5.3.2.2-002]
An MCVideo Group shall have the flexibility to be configured to allow simultaneous transmitting MCVideo Group Members.
[R-5.3.2.2-003]
The MCVideo service shall provide a mechanism for the MCVideo Service Administrator to configure the maximum number of simultaneous communications received by an off-network MCVideo User in a single MCVideo Group.
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5.3.2.3  Requesting Permission to Transmit

[R-5.3.2.3-001]
An authorized Participant shall be able to request to transmit to an MCVideo Group or an individual MCVideo User.
[R-5.3.2.3-002]
The MCVideo service shall determine which Participant(s) are permitted to transmit when there are simultaneous requests for permission to transmit within the same group.
[R-5.3.2.3-003]
Following an MCVideo request for permission to transmit on the Selected MCVideo Group, any Affiliated MCVideo User that made and was granted the request shall be given an indication of being allowed to transmit.
[R-5.3.2.3-004]
Following an MCVideo request for permission to transmit on the Selected MCVideo Group, any Affiliated MCVideo User that made and was not granted the request shall be given an indication that permission to transmit was not given at that time.
[R-5.3.2.3-005]
The MCVideo service when operating off-network shall provide a mechanism for an MCVideo Participant to cancel its MCVideo request to transmit at any stage, including before the request has been granted.
[R-5.3.2.3-006]
The MCVideo service shall provide a mechanism for the MCVideo Administrator to configure parameter(s) relating to the automatic termination of an off-network MCVideo service request to transmit.
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5.3.2.4  OverrideWord‑p. 29
[R-5.3.2.4-001]
An MCVideo UE shall be pre-provisioned by an MCVideo Administrator and/or authorized user with the necessary information in order that override may operate during off-network MCVideo communication.
[R-5.3.2.4-002]
The MCVideo service shall provide a mechanism for MCVideo Administrators to create a priority hierarchy for determining what Participants, Participant types, and urgent transmission types, when operating off the network, be granted a request to override an active off-network MCVideo transmission.
[R-5.3.2.4-003]
The priority hierarchy used for granting a request to override an active MCVideo transmission shall contain at least four (4) levels.
[R-5.3.2.4-004]
The MCVideo service shall provide a mechanism for Participants, to override an active MCVideo transmission of a transmitting Participant based on configuration.
[R-5.3.2.4-005]
If an MCVideo transmission is overridden, the MCVideo Service shall provide a means of notifying the overridden Participant(s) that the transmission has been overridden.
[R-5.3.2.4-006]
The MCVideo service shall provide a mechanism to enable an MCVideo Administrator to configure which MCVideo Group transmission(s) a Participant(s) receives, for cases where an MCVideo transmission can be overridden.
[R-5.3.2.4-007]
If the MCVideo Group has been configured to only allow the overriding transmitting Participant to transmit, the MCVideo service shall revoke the transmit permission of the overridden transmitting Participant.
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5.3.2.5  Terminating Permission to Transmit

[R-5.3.2.5-001]
A transmitting Participant shall be able to indicate to the off-network MCVideo service that the Participant no longer wants to transmit.
[R-5.3.2.5-002]
The off-network MCVideo service shall provide an indication to receiving Participants that the transmitting Participant has finished transmitting.

5.3.2.6  Transmit Time Limit

[R-5.3.2.6-001]
The Off-Network MCVideo Service shall provide a mechanism for an MCVideo UE to be pre-provisioned by an MCVideo Administrator and/or authorized user with the necessary information in order that a transmit time limit function may operate during off-network MCVideo communication.
[R-5.3.2.6-002]
The Off-Network MCVideo Service shall enable an MCVideo Administrator to configure the limits (e.g. elapsed time, quantity of data) for any transmission related to a single request to transmit.
[R-5.3.2.6-003]
The Off-Network MCVideo Service shall have configurable limits (e.g. elapsed time, quantity of data), including indefinite, for any transmission related to a single request to transmit (e.g. elapsed time, quantity of data).
[R-5.3.2.6-004]
The Off-Network MCVideo Service shall provide an indication to the transmitting Participant a configurable amount before the transmit limit is reached.
[R-5.3.2.6-005]
The Off-Network MCVideo Service shall provide an indication to the transmitting Participant that the Participant's transmit limit has been reached.
[R-5.3.2.6-006]
The Off-Network MCVideo Service shall remove the permission to transmit from the transmitting Participant when the Participant's transmit limit has been reached.
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5.4  Performance and quality requirements for on-network and off-networkWord‑p. 30

5.4.1  MCVideo device and camera moving at high speed

5.4.1.1  Service description

Motion affects the length of time a desired target is shown in the video frame, and can cause the target to blur. The level of motion in a particular piece of video content can have a huge impact on the performance of a video coder. A moving camera might also produce video that is much more difficult to encode efficiently.
For public safety applications, if the video is considered "mission critical," the loss or interruption of a video stream or any significant delay in the delivery of the video stream might be unacceptable for processing by the video decoder. Therefore, if a source of video content is in motion and handovers between radio coverage areas are necessary, then it is important that the handovers are handled in a manner to minimize loss, interruption and delay of the video stream.
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5.4.1.2  Requirements

[R-5.4.1.2-001]
The MCVideo Service shall support one-to-one video communications between authorized MCVideo UEs when the transmitting and/or receiving MCVideo UEs are moving at different speeds, from 0 km/h to 160km/h.
[R-5.4.1.2-002]
The MCVideo Service shall support group video communications between authorized MCVideo UEs when the transmitting and/or receiving MCVideo UEs are moving at different speeds, from 0 km/h to 160km/h.

5.4.2  Latencies

[R-5.4.2-001]
The MCVideo Service shall ensure that transmission of urgent real time video transmissions shall be started within 2 seconds after the request.
[R-5.4.2-002]
The MCVideo Service shall ensure that the end-to-end delay from transmitting MCVideo UE to receiving MCVideo UE or console for urgent real time video transmissions shall be no more than 1 s.
[R-5.4.2-003]
A sending MCVideo UE may be configured to begin storing video immediately from the time the user requests an MCVideo transmission. In this case the end to end delay shall not exceed 1 s plus the commencement delay (up to 2 s).
[R-5.4.2-004]
The MCVideo Service shall ensure that the end-to-end delay from transmitted MCVideo UE to receiving MCVideo UE or console for non-urgent real time priority video transmissions shall be no more than 10 s.
[R-5.4.2-005]
Synchronisation between video and audio when played at the MCVideo receiving UE or console shall be within 50 ms.
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6  Interworking

6.1  Interworking with non 3GPP video systems

[R-6.1-001]
The MCVideo service shall, be able to interwork with non 3GPP systems subject to capabilities and compatibilities limitations using standardized interface(s).

$  Change historyWord‑p. 31

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