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Throughput Analysis and Optimization of Distributed Collision Detection Protocols in Dense Wireless Local Area Networks

  • Choi, Hyun-Ho (Department of Electrical, Electronic and Control Engineering, and the Institute for Information Technology Convergence, Hankyong National University) ;
  • Lee, Howon (Department of Electrical, Electronic and Control Engineering, and the Institute for Information Technology Convergence, Hankyong National University) ;
  • Kim, Sanghoon (Department of Electrical, Electronic and Control Engineering, and the Institute for Information Technology Convergence, Hankyong National University) ;
  • Lee, In-Ho (Department of Electrical, Electronic and Control Engineering, Hankyong National University)
  • Received : 2015.03.16
  • Accepted : 2015.09.17
  • Published : 2016.06.30

Abstract

The wireless carrier sense multiple access with collision detection (WCSMA/CD) and carrier sense multiple access with collision resolution (CSMA/CR) protocols are considered representative distributed collision detection protocols for fully connected dense wireless local area networks. These protocols identify collisions through additional short-sensing within a collision detection (CD) period after the start of data transmission. In this study, we analyze their throughput numerically and show that the throughput has a trade-off that accords with the length of the CD period. Consequently, we obtain the optimal length of the CD period that maximizes the throughput as a closed-form solution. Analysis and simulation results show that the throughput of distributed collision detection protocols is considerably improved when the optimal CD period is allocated according to the number of stations and the length of the transmitted packet.

Keywords

Acknowledgement

Supported by : National Research Foundation of Korea (NRF)

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