Telecommunications Science ›› 2016, Vol. 32 ›› Issue (2): 34-40.doi: 10.3969/j.issn.1000-0801.2016.02.005

• research and development • Previous Articles     Next Articles

Performance analysis of random access network with post-backoff

Chaolun BU1,Yang XIAO1,Tong YE1,Peng WU2,Xiaojian ZHANG2,Junmin WU2   

  1. 1 State Key Laboratory of Advanced Optical Communication Systems and Networks,Shanghai Jiaotong University,Shanghai 200240,China
    2 State Grid Smart Grid Research Institute,Nanjing 210003,China
  • Published:2017-02-03
  • Supported by:
    The Key Technology and Power Grid Application Research of All-Optic Switching

Abstract:

Performance analysis of random access network protocol in wireless local area network is a research hotspot in recent years,and the existing models have yet to describe post-backoff mechanism effectively. Therefore, the performance of the random access network under the unsaturated condition based on a two stage Markov model was analyzed. First of all,embedded Markov chain was used to describe the service process of the head-of-line (HOL)packet in each node,then the concept of virtual service time was introduced,namely regarding the p ost-backoff process after the successful transmission as a part of the HOL packet service time,then the virtual service time distribution of the HOL packet was attained. Next,the queuing process of each node was considered as a Geo/G/1 system,then the close-form result of system throughput,delay and the range of the stable region under the unsaturated condition was achieved. The simulation results have verified the accuracy of our model. The model will shed light on the future research on distributed coordination function(DCF)protocol in wireless local area network.

Key words: random access network, post-backoff, performance analysis, Markov chain

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