随机接入移动无线传感器网络快速组网媒体访问控制

基于非时隙CSMA/CA随机接入机制的IEEE802.15.4MAC协议组网耗时过长，不能满足自组网实时通信应用需求。针对这一问题，分析了MAC组网流程中各步骤所耗时间，提出一种新的快速组网策略，采用预分配信道，将关联过程从间接传输简化为直接传输，改进CSMA/CA冲突避免机制以减少冲突。仿真实验和现场测试结果均表明，与IEEE 802.15.4协议相比，提出的快速组网策略使得信道冲突降低，组网时间更快，更符合实时通信需求。

Fast networking media access control for random access based mobile wireless sensor networks

This paper researched the fast networking Media Access Control (MAC) of mobile sensor networks based on unslotted CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance) random access algorithm. This paper analyzed and optimized the networking process by pre assigning the channels, simplified the association process using direct transmission instead of indirect transmission, and improved the CSMA/CA mechanism in order to reduce the collision. The simulation and field test results show that the proposed method can reduce the collision and the networking time effectively compared with the IEEE 802.15.4 protocol.