Journal on Communications ›› 2020, Vol. 41 ›› Issue (4): 92-101.doi: 10.11959/j.issn.1000-436x.2020060

• Papers • Previous Articles     Next Articles

RAW online regrouping method in IEEE 802.11ah protocol for industrial Internet of things

Yanjing SUN1,Junqiu YANG1,Yan CHEN1,Yanfen WANG1,Xiaojing CHEN2,Fengzhen LIU2,Zhi SUN3   

  1. 1 School of Information and Control Engineering,China University of Mining and Technology,Xuzhou 221116,China
    2 Tiandi (Changzhou) Automation Co.,Ltd.,Changzhou 213015,China
    3 Department of Electrical Engineering,University at Buffalo,the State University of New York,Buffalo 14260,USA
  • Revised:2020-03-02 Online:2020-04-25 Published:2020-04-30
  • Supported by:
    The National Key Research and Development Program of China(2017YFC0804400)

Abstract:

Aiming at the problem that the standard RAW mechanism cannot adjust to changes in the network and the grouping depends on continuous AIDs,a RAW regrouping method based on a pseudo-random sequence was proposed.The AP assigned a pseudo-random sequence to the node as the address code during the association phase,and used compound code to carry groups information during the grouping phase.It implemented online regrouping of discontinuous AID nodes and reduced the overhead of regrouping.In order to rationally allocate resources in RAW and solve the problem of load imbalance between groups,a RAW regrouping method based on expected channel time was proposed.Based on channel utilization,the RAW groups,RAW duration,and numbers of RAW were optimized.NS3 simulation results show that the proposed method significantly improves the performance of IEEE 802.11ah protocol networks.

Key words: monitoring sensor network, IEEE 802.11ah protocol, RAW mechanism, pseudo random sequence

CLC Number: 

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