一种新的无线传感网络的时隙分配策略

A novel TDMA slot allocation algorithm in Wireless Sensor Networks

摘要:

时隙分配是时分多址(TDMA)接入的核心。TMDA将时间划分为若干个固定时隙，使2个干扰的节点在不同时隙内传输数据，进而降低接入碰撞率。为此，提出基于分布式TDMA的时隙分配算法。该算法以Drand算法为基础，对其进行改进。利用路由信息分配时隙，降低通信时延和传输的消息数。仿真结果表明，与Drand算法相比，提出的算法传输时延降低了约8%，传输的消息数约下降了24%。

Abstract:

Slot assignment is the core component of Time Division Multiple Access(TDMA) protocols in wireless networks. By dividing the time into several fixed time slots, TMDA enables the two interfering nodes to transmit data in different time slots, thereby reducing the access collision rate. Therefore, a distributed TDMA slot allocation algorithm is proposed in this paper. Based on the Drand algorithm, the proposed algorithm is improved. Routing information is utilized to allocate time slots to reduce communication delay and the number of transmitted messages. The experiment results show better performance in comparison to referenced distributed channel allocation approaches. The latency is improved by 8%, and the messages complexity is reduced by 24% respectively.