TinyOS中报头压缩原型系统设计与实现

无线传感器网络的资源非常有限，报头压缩技术能够在较大程度上减小数据传输量，提高资源利用效率。重点分析了TinyOS协议栈中主动消息层和通信层的报头特征和可压缩性，在此基础上提出一种适合TinyOS的报头压缩方案，可显著减少报头长度。修改了TinyOS的通信组件，在其协议栈中插入压缩层，使系统具有报头压缩功能。基于Micaz节点组成的网络，设计开发了一个进行报头压缩的原型系统，实现了该报头压缩方案，并对方案的实际性能进行了评估。对比实验显示，此原型系统可有效减少网络能耗、降低网络丢包率。

Design and implementation of header compression prototype system in TinyOS

Wireless Sensor Networks (WSNs) are resource constraint, and header compression can significantly reduce the amount of data transferred and improve channel utilization efficiency. The header characteristics and compressibility of the active message layer and communication layer in the protocol stack of the TinyOS were analyzed, then a header compression scheme for TinyOS was proposed, which could reduce the length of header significantly. First, communication components of TinyOS were modified and a new compression layer was inserted in the protocol stack to make the TinyOS support header compression. Then, based on a network composed of Micaz nodes, a header compression prototype system was designed and developed to implement the header compression scheme. The results of comparison experiments show that the prototype system can effectively reduce energy consumption and packet loss rate of the network.