基于DSA的无线传感器网络自适应MAC协议研究

摘要

针对工业监测用无线传感器网络高可靠和低功耗的要求,基于TDMA协议提出了一种动态时隙分配(DSA)的自适应介质访问控制(DSA-MAC)协议,通过估计链路质量动态调整节点的时隙长度,提高数据传输的可靠性.该协议中加入了基于接收信号强度指示(RSSI)的自适应功率调整机制,实现网络的低功耗要求.利用CC2530硬件平台实现DSA-MAC协议,并在工业现场进行测试,结果表明:该协议提高了数据传输率并降低了网络能耗,能够适应工业环境的应用需求.%Aiming at requirements of high reliability and low power consumption for wireless sensor networks in industrial monitoring, a dynamic slot assignment ( DSA) adaptive MAC protocol called DSA-MAC protocol is proposed based on TDMA protocol,and the slot length is adjusted dynamically by link quality estimation in order to improve reliability of data transmission. An adaptive power adjustment mechanism based on receiving signal strength indication ( RSSI) is added in protocol to realize low power consumption requirements of the network. The DSA-MAC protocol is implemented on the CC2530 hardware platform, and is tested in the industrial field. The result shows that the protocol improves data transmission rate, and reduces energy consumption of networks, and can adapt to industrial environment application needs.