Link Scheduling Method for Underwater Acoustic Sensor Networks Based on Correlation Matrix
Link Scheduling Method for Underwater Acoustic Sensor Networks Based on Correlation Matrix
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DOI：
10.1109/jsen.2015.2441140
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发表时间：
2016-06
影响因子：
4.3
通讯作者：
Weigang Bai;Haiyan Wang;Xiaohong Shen;Ruiqin Zhao
中科院分区：
文献类型：
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作者：
Weigang Bai;Haiyan Wang;Xiaohong Shen;Ruiqin Zhao
水声通信信道的独特特性迫使水声传感器网络开发新的协议。尤其要考虑到声信号在水下传播速度较慢的问题。建立了多跳水声传感器网络的介质访问控制（MAC）层链路调度模型。该模型利用相关矩阵描述链路间的冲突关系，利用传播延迟生成冲突矩阵进行冲突检测。为了使帧长度最小，引入了一种功率控制策略，旨在减少链路干扰的影响。在此基础上，提出了一种求解无冲突问题的启发式算法。仿真结果表明，链路调度方法和功率控制策略可以有效地提高网络吞吐量和端到端时延的性能。
The unique characteristic of the underwater acoustic communication channel force development of new protocols for underwater acoustic sensor networks. Especially, the pretty slower propagation speed of acoustic signals in underwater should be taken into consideration. This paper constructs a link scheduling model on medium access control (MAC) layer for multihop underwater acoustic sensor networks. The proposed model employs correlation matrix to describe the conflicts relationship among links and uses propagation delay to generate conflict matrix for collision detection. In order to minimum the frame length, a power control strategy is introduced and aimed to reduce the effect of link interference. Then, a heuristic algorithm is presented to solve the conflict-free problem based on the model. Simulation results show that the link scheduling method and the power control strategy can effectively improve network performance with respect to throughput and end-to-end delay.