研究基于IP无线网络中精细粒度可伸缩性（FGS）视频的传输。 基于包交换的IP无线网络通常由两段链路组成：有线链路和无线链路。
The problem of transmitting a FGS video sequence over an IP-based wireless network consisting of both wired and wireless links is addressed.
为了解决无线上网中误码率较高和传输延迟大的问题，需要有一种用于改善有线和无线链路的综合性技术。
To solve the problems of high BER and large transmission delay in wireless Internet, there should be a comprehensive technology to improve wireline and wireless link.
此外，当很多同时用户使一个链路饱和时，有线电视系统还会碰到争夺问题。
In addition, cable will encounter contention problems when multiple concurrent users saturate a link.
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