SIP Media Description Exchange for IPTV Session Setup
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Solution Overview
Problem
The existing IPTV service setup methods, particularly the second mode, result in prolonged session setup times and poor user experience due to increased interactions between User Equipment (UE) and the network, leading to delayed service initiation and higher requirements for the UE.
Innovation Solution
A method and device for obtaining media description information using SIP messages to establish IPTV services, where a network device receives a SIP request from a UE, generates a response carrying media description information in SDP, and sends it back to the UE, allowing for efficient media control channel and delivery channel setup.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the second mode is adopted for establishing media control channel and media delivery channel, then the service can be provided with proper media control, but the session setup time is prolonged and user experience deteriorates
Solution Approach 1:
The patent combines the media control channel establishment and media delivery channel establishment into a single SIP session setup process. Instead of sequentially establishing the media control channel first and then the media delivery channel, both channels are negotiated and established simultaneously through integrated SDP message exchange, thereby reducing session setup time while maintaining proper media control capabilities.
Solution Approach 2:
The patent performs preliminary negotiation of media delivery channel parameters during the initial SIP session setup, before actual media transmission begins. By including media delivery channel description information in the SDP offer/answer exchange during session initialization, the system prepares all necessary channel configurations in advance, avoiding delays during media playback.
2Manufacturing precision
If the second mode is adopted with multiple interaction steps, then proper media parameter negotiation is achieved, but the number of interactions increases and system complexity rises
Solution Approach 1:
The patent merges multiple interaction steps into a single integrated SIP session setup process. Instead of separate exchanges for media control channel negotiation and media delivery channel negotiation, both are combined into one unified SDP message exchange sequence, reducing the total number of interactions while maintaining accurate media parameter negotiation through comprehensive SDP information inclusion.
3Adaptability or versatility
If the second mode is adopted for channel establishment, then flexible media control is provided, but the service initiation is delayed and responsiveness decreases
Solution Approach 1:
The patent performs preliminary configuration of both media control channel and media delivery channel during the initial SIP session setup. By negotiating all necessary channel parameters and establishing both channels in advance through integrated SDP exchange, the system eliminates delays during service initiation while maintaining the flexibility of media control through proper SDP parameter negotiation.
Data Source
AI summary
A method and device for obtaining media description information of Internet Protocol Television (IPTV) services are provided. The method includes: receiving, by a network device, a Session Initiation Protocol (SIP) request for obtaining media description information, where the SIP request is sent by a User Equipment (UE) through a core IP Multimedia Subsystem (IMS) and carries a content identifier; sending, by the network device, a SIP response that carries the media description information corresponding to the content identifier to the UE through the core IMS. According to the present disclosure, a SIP message is used to obtain media description information, so that a session of the Content on Demand (CoD) service is set up.