AN ENERGY-AWARE ROUTING PROTOCOL FOR ZIGBEE WIRELESS SENSOR NETWORKS

• Main Authors: Shao-Han Liao, 廖紹涵
• Other Authors: Ching-Kuen Lee
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/30656355651951116274

碩士 === 大同大學 === 通訊工程研究所 === 98 === ZigBee communication protocol has the characteristics of low cost, low power consumption, small volume, and easy to deployment, therefore it is suitable for wireless sensor networks. Wireless sensor network often need monitoring under the difficult environment for a long time. In these cases, when the sensor nodes are deployed, the batteries of sensor nodes are difficult to replace. In the research of wireless sensor network, how to reduce the power consumption and prolong the lifetime has become a very important issue. In mesh topology, ZigBee route generally used a simplified version of Ad hoc On-demand Distance Vector (AODV), that is AODV Junior (AODVjr). AODVjr will only choose the fastest reaching path to the destination node, with no consideration of the traffic load, remaining energy and other factors. The data transmission often concentrate on only a small number of routes, with these nodes receiving and forwarding packets frequently and thus exhausting their energy faster than other nodes. In this thesis, we propose two improved routing algorithms, Minimum Energy AODV (ME-AODV) and Average Energy AODV (AE-AODV). When data transmitting and route discovery are required, the node will consider the residual energy of every route, and choose the route with more residual energy and forward packets. Through the use of the NS-2 simulator, the results show that our protocol can increased the survival time of network nodes and effectively balance the energy consumption for network nodes, thus the network lifetime can be improved.