| 摘要 |
Systems, apparatuses, and methods for implementing IPTV service are disclosed according to the present invention. In particular, a user equipment initiates an IPTV service request to an IPTV application subsystem in an IMS session. The IPTV application subsystem acquires content description from a service selection function entity according to the IPTV service request, and enables a multimedia delivery subsystem to provide content to the user equipment based on the acquired content description. According to the present invention, a content description function entity is provided in the system. The content description function entity is able to provide content description which may be utilized in the IMS session procedure for the purpose of implementing IPTV service.
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