P2P real time stream media buffer replacing method based on time weight parameter

A cache replacement and real-time streaming technology, which is applied in the direction of data exchange network, digital transmission system, two-way working system, etc., can solve the problems of occupying bandwidth, affecting users to use other normal network applications, and few caching methods, etc., so as to improve caching hit rate effect

Inactive Publication Date: 2008-07-30
TSINGHUA UNIV
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AI Technical Summary

Problems solved by technology

[0002] The P2P working mechanism is widely used in the existing network. P2P applications generate huge network traffic, occupying most of the bandwidth on the ISP backbone link. This not only brings pressure on ISP equipment operation and upgrade, but also affects to the user using other normal web applications
With the popularity of IP-TV (P2P real-time streaming media) on the Internet, it can be predicted that in the future ISP backbone link traffic, P2P real-time streaming media applications will occupy a considerable proportion. At present, the main research focuses on P2P file distribution. In terms of caching research on applications and P2P non-real-time streaming media applications, there are also some researches on cache replacement methods for P2P real-time streaming media application clients, and there are few researches on caching methods for P2P real-time streaming media applications that directly target ISPs.

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  • P2P real time stream media buffer replacing method based on time weight parameter
  • P2P real time stream media buffer replacing method based on time weight parameter

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Embodiment Construction

[0024] The TOW-P2P real-time streaming media cache replacement method of the present invention is used on the P2P real-time streaming media cache server deployed by the ISP, and the ISP usually deploys the cache server at the exit of the network, as shown in Figure 2, deploys the cache server at the exit of the campus network Or the exit of the metropolitan area network. Deploying a P2P real-time streaming media cache server can effectively reduce the traffic pressure at the network egress and shorten the user's playback delay.

[0025] The specific implementation steps of the TOW method are as follows:

[0026] Step (1): Initialize the cache size as CacheSize, CID i is the unique identifier of the i-th channel, ChannelHOT CIDi Rate this channel. beta i The time weight parameter to use for this channel. Go to step (2).

[0027] Step (2): When the P2P real-time streaming segment requests P ij =(ID j , CID i ) arrives in the cache, update the fragment's last access time...

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Abstract

A time-weighted-coefficient-based real-time streaming media cache replacement method (TOW-Time Over Weight) belongs to the technical field of internet P2P real hyphen time media and cache replacement and is characterized in that the time characteristic of real-time synchronization of P2P real-time streaming media application users is analyzed with TOW method and meanwhile the effect of the last access time and the expected residual request of fragments on the cache are considered. The TOW algorithm can differentiate 'hot and cold' channels and 'cold or hot' fragments in the same channel and remain the 'hot' fragments in the cache to improve cache hit ratio. The cache effect of the method in the invention is confirmed better than the effect of common cache replacement method, suitable for P2P real-time streaming media application.

Description

technical field [0001] A P2P real-time streaming media cache replacement method based on time weight parameters (TOW-Time Over Weight) belongs to the research field of Internet P2P real-time streaming media and cache replacement methods. Background technique [0002] The P2P working mechanism is widely used in the existing network. P2P applications generate huge network traffic, occupying most of the bandwidth on the ISP backbone link. This not only brings pressure on ISP equipment operation and upgrade, but also affects to the user using other normal web applications. With the popularity of IP-TV (P2P real-time streaming media) on the Internet, it can be predicted that in the future ISP backbone link traffic, P2P real-time streaming media applications will occupy a considerable proportion. At present, the main research focuses on P2P file distribution. In terms of caching research on applications and P2P non-real-time streaming media applications, there are also some resea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04N7/173H04L29/08H04N21/231
Inventor 徐恪胡懋智叶明江
Owner TSINGHUA UNIV
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