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Method and system for providing media stream in process of media server switching

A technology of media server and switching process, applied in the field of Internet Protocol Multimedia Subsystem, can solve the problems of media stream interruption, affecting IMS network response speed, affecting user experience, etc.

Inactive Publication Date: 2009-01-07
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is because the media playback control is directly processed between the UE and the MCF, and the session control for media renegotiation is processed through the SIP signaling of the IMS Core. Therefore, the process of switching the media server for the media renegotiation mode There are many links, and it is necessary to re-reserve resources in the IMS network before the media stream can be provided by the switched media server. These will affect the response speed of the IMS network. In severe cases, the media stream will be interrupted and affect the reception by the UE. User Experience for Media Streaming

Method used

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  • Method and system for providing media stream in process of media server switching
  • Method and system for providing media stream in process of media server switching
  • Method and system for providing media stream in process of media server switching

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Experimental program
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specific Embodiment 1

[0093] Specific embodiment one, adopt the media agent mode of RTP level agent

[0094] This embodiment adopts the media proxy mode, and is a specific embodiment of the IMS-based IPTV service. Its network architecture is as follows Figure 8 As shown, the UE, IMS Core and SCF are existing entities in the system architecture of the existing IMS-based IPTV service, and no new modifications and requirements are made in the embodiment of the present invention. The embodiments of the present invention mainly modify the MCF and MDF in the system architecture of the IMS-based IPTV service.

[0095] exist Figure 8 In this process, the UE uses the existing service interaction process, such as the SIP interaction process to interact with the SCF through the IMS Core to establish an IPTV service. Specifically, the SCF selects the MCF, and then the MCF selects an MDF with the media content requested by the UE. After the IPTV service is established, the UE uses RTSP to perform VCR operat...

specific Embodiment 2

[0142] Specific embodiment two, adopt the media agent method of application-level agent

[0143] In the specific embodiment 1, the media proxy uses an RTP-level proxy, that is, the proxied MDF2 sends the RTP packet carrying the media stream to the MDF1, and after being processed by the MDF1, it is repackaged into an IP packet and sent to the UE.

[0144] In the specific embodiment two, the media agent uses the agent of the application level, that is, what MDF2 sends to MDF1 is not the RTP packet carrying the media stream, but the media stream is directly sent to MDF1, such as using the File Transfer Protocol (FTP, File Transfer Protocol ) mode, etc., MDF1 directly uses media streams to assemble RTP packets and send them.

[0145] Therefore, the network logic architecture in the second embodiment is completely consistent with that in the first embodiment, and the large processes are also basically the same, except that the interaction between MCF and MDF1, MDF2, and between MDF...

specific Embodiment 3

[0152] Specific embodiment three, the mode of centralized management of media flow source IP address and port number

[0153]In this embodiment, the MCF is used to centrally manage the source IP address and port number of the media stream sent to the UE in the current IPTV service provided for the UE. The source IP address and port number of the media stream are centrally managed and allocated by the MCF. When the MDF sends the RTP packet carrying the media stream to the UE, the source IP address and port number sent by the media stream use the IP address and port number allocated by the MCF. Instead of using the MDF's own IP address and port number. Since the IP address used by the MDF is not its own IP address, the RTCP message sent by the UE to the MDF using this IP address as the destination address will not be directly routed to the MDF, but will be routed to the entity that actually has the IP address, and the entity needs to be responsible Forward the RTCP message sent...

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Abstract

The invention relates to a method and a system for providing a media stream during the switching process of a media server, wherein, the method comprises that: a media delivery function entity for providing the media stream for a user device is switched from a first media function delivery entity to a second media function delivery entity; the second media delivery function entity provides the media steam for the user device, and the media steam is sent by the first media delivery function entity. The method and the system provided by the invention can realize that the original media steam parameters can be maintained unchanged without the re-consultation of the media steam parameters between the user device and a network during the switching process of the media server, thereby avoiding the delay caused by the re-consultation process of the media steam parameters and accelerating the response speed of the system.

Description

technical field [0001] The present invention relates to the field of Internet Protocol Multimedia Subsystem (IMS, IP Multimedia Subsystem), in particular to a method and system for providing media stream during media server switching process in IMS network. Background technique [0002] Media streaming service or Internet Protocol Television (IPTV, IP TeleVision) service is a new service that has developed rapidly in recent years. These two services use streaming transmission technology to transmit multimedia files on a packet switching network, such as an IMS network. Including file content such as video and audio, these file contents can be played immediately without the user equipment (UE, User Equipment) downloading completely when accessing. The key technology for the realization of these two services is the streaming transmission technology, and the streaming transmission technology processes the continuous video and audio files and stores them on the server in the pac...

Claims

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Application Information

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IPC IPC(8): H04L29/06H04L12/56H04N7/173
CPCH04N21/6473H04L29/06217H04N21/44209H04N21/47202H04L65/1016H04N21/23116H04L29/06462H04N21/6125H04L65/4084H04N7/17336H04N21/6175H04L65/612
Inventor 王丰谢建新王鹏王耕漆宝剑张德文黄健李金成雷晓松
Owner HUAWEI TECH CO LTD
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