Method and apparatus for video service transmission

A method used for managing video service transmission in a network device, wherein the video service is coded as base coding layer data and enhancement coding layer data, and the method comprises:

• obtaining a first session start request signaling of multimedia broadcast multicast service from an upstream network device, the first session start request signaling of the multimedia broadcast multicast service being used to request establishing multimedia broadcast multicast service bearer for the enhancement coding layer data, the first session start request signaling of multimedia broadcast multicast service including dependency information, and the dependency information being used to indicate the coding layer data on which the enhancement coding layer data depends;
• determining whether the multimedia broadcast multicast service bearer, for the coding layer data on which the enhancement coding layer data depends, is successfully established;
• and
• when the multimedia broadcast multicast service bearer for the coding layer data on which the enhancement coding layer data depends is successfully established, forwarding the first session start request signaling of multimedia broadcast multicast service to a downstream network device of the network device;
• when the multimedia broadcast multicast service bearer for the coding layer data on which the enhancement coding layer data depends is not successfully established, suspending forwarding the first session start request signaling of multimedia broadcast multicast service to the downstream network device.

A method used for managing video service transmission in a base station, wherein the video service is coded as base coding layer data and enhancement coding layer data, and the method comprises:

• obtaining a first session start request signaling of multimedia broadcast multicast service from a multicast coordination entity, the first session start request signaling of multimedia broadcast multicast service being used to request establishing multimedia broadcast multicast service bearer for the enhancement coding layer data, the first session start request signaling of multimedia broadcast multicast service including dependency information, and the dependency information being used to indicate the coding layer data on which the enhancement coding layer data depends;
• determining whether the multimedia broadcast multicast service bearer for the coding layer data on which the enhancement coding layer data depends is successfully established;
• and
• when the multimedia broadcast multicast service bearer for the coding layer data on which the enhancement coding layer data depends is successfully, storing identification information that the multimedia broadcast multicast service bearer for the enhancement coding layer data is successfully established;
• when the multimedia broadcast multicast service bearer for the coding layer data on which the enhancement coding layer data depends is not successfully established, storing identification information that the multimedia broadcast multicast service bearing for the enhancement coding layer data is not successfully established;
• and transmitting to the multicast coordination entity a feedback of unsuccessfully establishing the multimedia broadcast multicast service bearer for the enhancement coding layer data.

A second apparatus used for managing video service transmission in a network device, wherein the video service is coded as base coding layer data and enhancement coding layer data, and the second apparatus comprises the following modules:

• a second obtaining module, used for obtaining a first session start request signaling of multimedia broadcast multicast service from an upstream network device, the first session start request signaling of multimedia broadcast multicast service being used to request establishing multimedia broadcast multicast service bearer for the enhancement coding layer data, the first session start request signaling of the multimedia broadcast multicast service including dependency information, and the dependency information being used to indicate the coding layer data on which the enhancement coding layer data depends;
• a first determining module, used for determining whether the multimedia broadcast multicast service bearer for the coding layer data on which the enhancement coding layer data depends is successfully established;
• and
• a second transmitter module, used for, when the multimedia broadcast multicast service bearer for the coding layer data on which the enhancement coding layer data depends is successfully established, forwarding the first session start request signaling of multimedia broadcast multicast service to a downstream network device of the network device;
• and
• when the multimedia broadcast multicast service bearer for the coding layer data on which the enhancement coding layer data depends is not successfully established, the second transmitter module is for suspending forwarding the first session start request signaling of multimedia broadcast multicast service to the downstream network device.