Method and system for asymmetric link compensation in P2P transmission

Abstract

The invention relates to a method for asymmetric link compensation in P2P transmission, comprising the following steps: when an active equivalent user having an unsymmetrical link switches in a node and detects that a download register writing rate is less than a broadcast register reading rate, informing a belonged local center management server to dispatch a precinct to supply a download content; informing a global center management server to dispatch one or more adjacent local center management servers to supply the download content if the download register writing rate is still less than the broadcast register reading rate, otherwise, getting into the routine P2P transmission process. The invention also relates to a system for asymmetric link compensation in P2P transmission. The invention uses local center management servers and the global center management server to dispatch each presidial idle resource so as to provide the download content to the active equivalent user having the unsymmetrical link, thereby the effect and the limitation of the asymmetric link to the P2P streaming medium is compensated, and the quality of service and P2P transmission thuoughput are improved.

Description

technical field [0001] The invention relates to the field of P2P transmission, in particular to a method and system for compensating an asymmetric link in P2P transmission. Background technique [0002] Asymmetric Digital Subscriber Line (ADSL) technology is a technology that provides users with broadband data transmission services through existing ordinary telephone lines. It provides a downlink rate of 8Mb / s and an uplink rate of 640Kb / s, and the transmission distance can reach 3-5 kilometers (if the transmission rate is high, the transmission distance will be shortened accordingly). The principle of ADSL is to download data to users with a high bit rate channel, and upload user data to the network at a much lower bit rate. Carry out ADSL transmission while making a call without affecting each other. [0003] Because ADSL makes full use of the existing copper cable resources, the current share of ADSL in China reaches 70%. However, the asymmetric link characteristic of ...

AI Technical Summary

Problems solved by technology

However, the asymmetric link characteristics of ADSL have a great impact on the service quality of P2P streaming media services, mainly reflected in the inability to improve the service quality of large-scale users watching streaming media, especially the DVD-level playback rate cannot be guaranteed

The downlink bandwidth of a general user can reach 1Mbps, but the uplink bandwidth is generally around 384Kbps to 512Kbps. Using conventional P2P transmission technology, it can achieve general playback quality (such as 392Kbps playback rate of pplive), but it cannot reach DVD level (such as 640K ~800Kbps) high-quality streaming media playback effect, because the uplink bandwidth of the P2P peer-to-peer users using the asymmetric link cannot satisfy the high-quality viewing of the next P2P peer-to-peer users connected to it

[0004] In order to overcome the limitations of ADSL on high-quality playback of P2P streaming media, the general solution is to borrow part of the bandwidth of the dedicated server to alleviate the lack of uplink bandwidth of the asymmetric link to support the next streaming media user, but this solution does not fully consider the network The use of other idle bandwidth in the network does not consider the requirement of reducing P2P repeated traffic in the backbone network

Although it can be compensated to a certain extent due to P2P peer-to-peer users using asymmetric links to watch DVD-quality playback rate requirements, but when there are large-scale asymmetric links for P2P peer-to-peer users to watch online, dedicated servers cannot meet the requirements. All real-time high-quality requirements of large-scale users (especially with DVD playback quality)

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