QUALITY OF SERVICES

January 21, 2009

quality of service refers to the capability of a network to provide better service to delect the network traffic over various technology. quality of service can provide different priority to different users or data flow , or gurantee a certain level of performance to a data flow in accordance with request from the application program or the internet service provider policy. in the streaming multimedia application some user want to perform VCR function such as farward, rewind, random access etc. this is the essential feature of the handling interactive VCR functions in proxy server environments. the VCR function are used for fast forward rewind and random access.

in addition to regular playbacks of streaming multimedia objects. its a desirable for a proxy server to efficiently handle interactive VCR functions for streaming multimedia objects applications. the fragmental proxy-caching scheme can naturally handle user interactive VCR functions due to its symmetrical objects fragmentations.

A proxy cache that efficiently manages the streaming of multimedia data in the proxy cache is proposed to improve the quality of the streaming multimedia services. the proposed system used a cache replacement based on the user request arrival rates for different multimedia objects and play back rates of various objects which makes the download very fast.

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