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Acta Armamentarii ›› 2020, Vol. 41 ›› Issue (9): 1837-1847.doi: 10.3969/j.issn.1000-1093.2020.09.016

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Implementation and Performance of FPGA-based Multi-priority Optimized CSMA in Ad Hoc Network

DING Hongwei1, LU Xu1,2, YANG Zhijun1,3, BAO Liyong1, LIU Qianlin1,4   

  1. (1.School of Information Science and Technology,Yunnan University,Kunming 650500,Yunnan,China;2.Kunming Detachment, Yunnan Provincial Corps of the Armed Police Force,Kunming 650051,Yunnan,China;3.Educational and Scientific Institute, Education Department of Yunnan Province,Kunming 650223,Yunnan,China;4.Yunnan Military Area Command,Kunming 650051,Yunnan,China)
  • Online:2020-11-18

Abstract: The ad hoc network is widely used in military field and some extreme natural environments because it has the characteristics of not needing to set up network facilities and strong invulnerability,etc. Random multiple access control protocol plays an important role of media access control layer in the ad hoc network,and the delay and reliability of multiple access protocol are the key factors that restrict the transmission quality. In order to solve the two key problems,the traditional random multiple access control protocol is improved,and an optimized three-dimensional probability carrier sense multiple access (CSMA) protocol model is proposed,which guarantees higher throughput and further improves the reliability of the protocol in the case of high arrival rate. At the same time,the different priorities are set for different sending nodes to achieve the purpose of differentiating services and enhance the utilization of channel resources. The results show that, compared with the traditional 1-persistent CSMA protocol,the optimized three-dimensional probability CSMA reduces the delay and increases the maximum throughput by 24.34%. According to the principle of the protocol,a hardware system of the multi-priority optimized three-dimensional probability CSMA based on field programmable gate array was designed.

Key words: multi-priorityoptimizedcarriresensemultipleaccess, field-proprammablegatearray, adhocnetwork, mediaaccesscontrol, randommultipleaccess, three-dimensionalprobabilitycarriersensemultipleaccess, multi-priority, throughput, delay

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