Based on the analysis of characteristics and compressibility of the header of Active Message Layer and Communication Layer, which are in the protocol stack of TinyOS, the thesis propose a header compression scheme for Active Message Layer and Communication Layer of TinyOS. The compression scheme can significantly reduce the header length by polo shirts inserting a compression layer in the protocol stack of TinyOS. When the scale of network is smaller, the header compression ratio can reach more than 70%. The compression scheme can be used for the chi hair straighteners actual sensor networks, applies to the application which uses multi-hop routing protocol for data transmission, supports the nodes which adopt the IEEE 802.15.4 standard, such as Micaz, iMote2 and so on.(3) The thesis designs and implements a header compression prototype system based on cheap ralph lauren polo shirts Micaz nodes in TinyOS. To make TinyOS support the header compression, the system communication components CC2420RadioM of TinyOS need to be modified. The header compressor is carried out in the command“send”of CC2420RadioM, and the header decompressor is carried out in the chi dazzle event“RXFIFODone”of CC2420RadioM. Based on the hardware platform“the prototype system of data compression key technologies in the asynchronous wireless sensor network environment”, which is the Lacoste Polo Shirts National 863 Plan committed by our laboratory, the thesis implements a header compression prototype system in Micaz nodes. The results of comparison experiments show that the prototype system can effectively reduce energy consumption and packet loss rate of the network with small extra storage.
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