Method and system for realizing time-transferring TV-set service based on NGN network

A network implementation and time-shifting technology, which is applied in the branch office to provide special service devices, TV, transmission systems, etc., to achieve the effect of enriching IMS services

Inactive Publication Date: 2007-09-05
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] The purpose of the present invention is to provide a method and system for realizing time-shifted TV service based on NGN network, so as to solve the problem of realizing time-shifted TV service in NGN network

Method used

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  • Method and system for realizing time-transferring TV-set service based on NGN network
  • Method and system for realizing time-transferring TV-set service based on NGN network
  • Method and system for realizing time-transferring TV-set service based on NGN network

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] Use SIP for RTSP negotiation to establish a multicast service flow, and use RTSP for subsequent service control and service flow switching mechanisms;

[0083] The process of establishing the initial multicast service flow can use SIP for business negotiation. During the SIP negotiation process, only RTSP channel information is negotiated, including at least RTSP address and port information. After negotiating RTSP address and port number information, the user terminal uses the negotiated RTSP The channel adopts RTSP standard process to negotiate transmission parameters (RTP, RTCP, codec format, etc.) The server sends it to the user.

[0084] The specific process is as follows: the terminal sends a service request to the AS, and the request carries the terminal's RTSP address and port information. After the request is routed, it reaches the media control function entity (MRFC). The media control function entity controls the media bearer function entity MRFP, and intera...

Embodiment 2

[0106] The process of establishing the initial multicast service flow uses SIP for service negotiation. In the SIP negotiation, RTSP channel information and media transmission parameters are negotiated, including at least RTSP address and port, service multicast address and port, etc.

[0107] The specific process is as follows: the user terminal sends a SIP request to the AS, and the request simultaneously carries the RTSP address and port information of the terminal as well as the RTP address and port information used to transmit the media stream. After the request is routed, it reaches the MRFC, and the MRFC controls the MRFP to interactively obtain the port information allocated by the MRFP for the RTSP connection and the RTP connection. Therefore, in the service request response returned by the MRFC, the address and port information of the RTSP connection of the MRFP and the address and port information of the RTP connection are carried at the same time. In this way, afte...

Embodiment 3

[0148] Embodiment 3: The process of establishing the initial multicast service flow adopts SIP for service negotiation. In the initial SIP negotiation, only media transmission parameters are negotiated, including at least the service multicast address and port. After the above initial negotiation is completed, the service flow is sent in multicast mode.

[0149] The specific instructions are as follows: the terminal initiates a SIP service request to the AS, and negotiates the media transmission parameters in the SDP; the AS initiates a resource request to the MRFC according to the request, and the request requires the MRFC to determine the media transmission parameters; the MRFC and the MRFP interact to determine the media transmission parameters. Transmission parameters, which are allocated by MRFP and terminated on MRFP; MRFC returns the result to AS after obtaining the RTSP media control channel parameters, which carries the negotiation result; AS routes the above negotiati...

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Abstract

The method comprises: a) after application server (AS) and media resource function controller (MRFC) make negotiation, user end (UE) establishes the multicast service stream with media resource function processor (MRFP); b) when UE requests to make unicast service stream control, according to UE request and after negotiating with MRFC, AS provides the unicast service stream established between UE and MRFP to UE. The invention uses the MRFC and MRFP originally existed in NGC to complete the switching control from multicast to unicast and to provide unicast stream.

Description

technical field [0001] The present invention relates to NGN network, in particular, relates to the technology of realizing time shift TV in NGN network. Background technique [0002] SIP (Session Initiation Protocol) is one of the multimedia communication system framework protocols formulated by IETF (Internet Engineering Task Force, Internet Engineering Task Force). It is an application layer protocol used to establish, change or end multimedia sessions, and RTP / RTCP (Real-time Transport Protocol / Real-time Transport Control Protocol), SDP (Session Description Protocol), RTSP (Real Time Streaming Protocol, implementation of streaming protocol), DNS (Domain Name Service) and other protocols to jointly complete the IMS (IP Multimedia Subsystem) session establishment and media negotiation; once the session is established, the media stream will be directly transmitted in the bearer layer using the RTP protocol, and multiple media can be flexibly exchanged in one session. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06H04N7/24H04N7/173
CPCH04L12/18H04N21/6377H04N21/6587H04N21/658H04N7/17336H04L29/06027H04L29/06517H04L65/608H04N21/2387H04L65/65
Inventor 严军吴向阳李金成
Owner HUAWEI TECH CO LTD
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