An Adaptive Header Compression Scheme in Wireless Multimedia Sensor Networks
无线多媒体传感器网络中一种自适应的报头压缩机制

Wireless multimedia sensor networks(WMSNs) transfer information-intensive data(e.g. audio,video,image) ,so it is necessary to utilize wireless channel efficiently. Header compression is a useful mechanism which can reduce the amount of data transferred and can improve channel utilization efficiency. Based on the characteristics of WMSNs,an advanced adaptive header compression(AAHC) scheme is proposed,which adjusts the parameters of compression algorithm according to the exact estimation of wireless channel state and adopts UDP(user datagram protocol) Lite as its transport layer protocol. This scheme can get high compression ratio and error-resistant robustness at the same time. The simulation results show that AAHC scheme outperforms the traditional ROHC(robust header compression) scheme and CRTP(compressed RTP) scheme.