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System and method for distributing data

A data and database technology, applied in the direction of digital transmission system, transmission system, two-way working system, etc., can solve problems such as guarantee, quality of service provided by users, and difficulty for service operators to have control authority, so as to achieve service quality assurance, good The effect of scalability

Inactive Publication Date: 2010-01-20
HITACHI LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In fact, the P2P model requires the client to participate in providing services, but the client is a user-end device, and it is difficult for the service operator to have absolute control authority (for example, to ensure that it is always online), so it does not have the stability and security that the server has. Reliability, at the same time, the client may frequently join or exit the P2P system, which is also a great challenge for the system to provide stable services. In addition, the client may also have performance limitations, such as processing capacity, uplink bandwidth, etc.
Therefore, for P2P systems, service reliability is a big problem, and it is difficult for the system to provide users with service quality guarantees.
This means that traditional P2P systems are difficult to directly apply to carrier-grade services, such as IPTV

Method used

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Embodiment Construction

[0025]The invention proposes a method and a device for realizing service quality assurance in a video-on-demand system based on P2P technology. By using P2P technology, clients can provide services to each other to enhance the scalability of the system. When the P2P mode cannot achieve satisfactory service quality due to the unreliability of peer-to-peer nodes, the system will enable the client-server mode to provide users with more reliable services through the server. Compared with the traditional technology, the advantage of the present invention is that the system not only has good scalability, but also can provide users with satisfactory service quality.

[0026] figure 1 Shown is a simplified IPTV system. The system includes, but is not limited to, a content server 102 , one or more clients 104 , and a network connection 106 .

[0027] Client 104 generally has a storage device, and client 104 communicates with content server 102 and other clients through network conne...

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Abstract

The invention relates to a system and a method for achieving quality-of-service guaranteed data distribution in a video-on-demand system based on a P2P technique, wherein by combining a P2P mode with a client-server mode, the system has better performance. In the system and the method, through the P2P mode, clients can provide services for each other so that the system has excellent expandability. When the P2P mode cannot provide satisfactory performances due to the unstability of the clients, the client-server mode is combined with the P2P mode to provide a quality-of-service guarantee for users.

Description

technical field [0001] The invention relates to a method and a device of a data distribution system for realizing service quality assurance in a video-on-demand system based on P2P technology. Background technique [0002] Content distribution is one of the key technologies of the IPTV system. There are mainly two modes at present, one is the traditional client-server mode, and the other is the peer-to-peer transmission (P2P) mode. For the distribution of video-on-demand content in IPTV systems, the traditional client-server model will encounter scalability problems. In order to realize the click-to-play function, each time the server receives a request from a client, it will separately establish a unicast connection for it. Therefore, this mode requires the server to have sufficient egress bandwidth and high enough performance, thus making the system very expensive and difficult to support a large number of users. [0003] Compared with the client-server model, the P2P-b...

Claims

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Application Information

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IPC IPC(8): H04L12/58H04N7/173G06F13/00H04N21/4788
Inventor 朱鹏吉内英也
Owner HITACHI LTD
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