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A MAC Protocol of Concurrent Scheduling Based on Spatial-Temporal Uncertainty for Underwater Sensor Networks
Journal of Sensors ( IF 1.9 ) Pub Date : 2021-03-28 , DOI: 10.1155/2021/5558078
Xin Liu 1, 2 , Xiujuan Du 1, 3 , Meiju Li 1 , Lijuan Wang 1 , Chong Li 1
Affiliation  

Underwater sensor networks (UWSNs) are characterized by large energy consumption, limited power supply, low bit rate, and long propagation delay, as well as spatial-temporal uncertainty, which present both challenges and opportunities for media access control (MAC) protocol design. The time-division transmissions can effectively avoid collisions since different nodes transmit packets at different period of time. Nevertheless, in UWSNs with long propagation delay, in order to avoid collisions, the period of time is subject to be long enough, which results in poor channel utilization and low throughput. In view of the long and different propagation delay between a receiving node and multiple sending nodes in UWSNs, as long as there is no collision at the receiving node, multiple sending nodes can transmit packets simultaneously. Therefore, in this paper, we propose a MAC protocol of concurrent scheduling based on spatial-temporal uncertainty called CSSTU-MAC (concurrent scheduling based on spatial-temporal uncertainty MAC) for UWSNs. The CSSTU-MAC protocol utilizes the characteristics of temporal-spatial uncertainty as well as long propagation delay in UWSNs to achieve concurrent transmission and collision avoidance. Simulation results show that the CSSTU-MAC protocol outperforms the existing MAC protocol with time-division transmissions in terms of average energy consumption and network throughput.

中文翻译:

基于时空不确定性的水下传感器网络并发调度MAC协议

水下传感器网络(UWSN)的特点是能耗大,电源受限,比特率低,传播延迟长以及时空不确定性,这给媒体访问控制(MAC)协议设计带来了挑战和机遇。时分传输可以有效避免冲突,因为不同的节点在不同的时间段传输数据包。然而,在具有长传播延迟的UWSN中,为了避免冲突,时间段要足够长,这导致较差的信道利用率和低吞吐量。考虑到UWSN中接收节点与多个发送节点之间的传播延迟时间长且不同,只要在接收节点上没有冲突,多个发送节点就可以同时传输数据包。所以,在本文中,我们为UWSN提出了一种基于时空不确定性的并发调度MAC协议,称为CSSTU-MAC(基于时空不确定性MAC的并发调度)。CSSTU-MAC协议利用时空不确定性以及UWSN中的长传播延迟特性来实现并发传输和避免冲突。仿真结果表明,在平均能耗和网络吞吐量方面,CSSTU-MAC协议在时分传输方面优于现有的MAC协议。CSSTU-MAC协议利用时空不确定性以及UWSN中的长传播延迟特性来实现并发传输和避免冲突。仿真结果表明,在平均能耗和网络吞吐量方面,CSSTU-MAC协议在时分传输方面优于现有的MAC协议。CSSTU-MAC协议利用时空不确定性以及UWSN中的长传播延迟特性来实现并发传输和避免冲突。仿真结果表明,在平均能耗和网络吞吐量方面,CSSTU-MAC协议在时分传输方面优于现有的MAC协议。
更新日期:2021-03-29
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