IMS based peer-to-peer network caching service signalling control method

Abstract

The present invention relates to signaling control method for the peer-to-peer network caching service based on the IMS. The method comprises the following steps: a user requesting entity sends out a request of retrieving a target file to an index server, the index server retrieves one or a plurality of target user entities through internal retrieval algorithm, and returns the retrieval results to the requesting user entity by using the multi-option reorientation response message in the SIP protocol, the multi-option reorientation response message consists of the caching server information, the caching server information adopts a unified resource indicant of the caching server or the IP address of the caching server; the requesting user entity sends an invitation request message to the caching server, to establish the TCP data connection used for downloading the target file. The present invention adopts the request and response message of the SIP protocol standard, through adding a first domain and the message content, the IMS network is avoided from suffering the large-scale upgrading and reconstruction, and the flexible caching service is realized through the flexibility of the SIP protocol.

Description

technical field [0001] The invention is a network control method, more specifically, the invention relates to an IMS-based peer-to-peer network cache service signaling control method. Background technique [0002] Session Initiation Protocol (SIP) is an application layer control protocol for multimedia communication on IP networks proposed and standardized by the Internet Engineering Task Force (IETF). It is used to create, modify and terminate sessions attended by one or more participants. , and provide negotiation of terminal communication capabilities. The SIP protocol is simple in structure, strong in scalability and good in network compatibility. SIP is a text-based protocol, and the realization of SIP protocol functions is completed by a series of SIP protocol messages. SIP protocol messages are divided into request messages sent by the client to the server and response messages sent by the server to the client. [0003] The Internet Multimedia Core Subsystem (IMS) ...

AI Technical Summary

Problems solved by technology

[0004] The P2P file sharing service created on the basis of IMS can specify the route (intermediate node) passed by the SIP message itself by using the field values ​​of the header fields such as Via and Record-Route in the SIP protocol, but it does not There is no definition of how to specify media and file data to pass through an intermediate node (such as a cache server), which makes it difficult for operators to control the cache server and implement cache services through the SIP protocol. The SIP protocol must be extended

Since the addition of new SIP message types will lead to a large-scale upgrade of the IMS network, which is not conducive to the development of services, the control signaling of the cache server must use the existing SIP protocol message types

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