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Wireless environment evaluation method and wireless communicaton system

  • US 10,681,735 B2
  • Filed: 02/23/2017
  • Issued: 06/09/2020
  • Est. Priority Date: 02/26/2016
  • Status: Active Grant
First Claim
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1. A wireless environment evaluation method evaluating a wireless environment of a wireless communication system, which is in an exposed situation in reception in which a normal reception rate of a prescribed wireless station decreases due to hidden wireless stations, in which a plurality of wireless stations share a same wireless channel and perform wireless communication using CSMA/CA (Carrier Sense Multiple Access/Collision Avoidance) method, the wireless environment evaluation method comprising:

  • acquiring a transmission and reception history of wireless signals transmitted and received between the plurality of wireless stations, and acquiring or estimating a number of wireless stations in transmission standby, based on the transmission and reception history;

    calculating a normal reception rate S in a congesting situation in reception according to the number of wireless stations in transmission standby, where the normal reception rate indicates a probability that transmission timing for the wireless stations in transmission standby overlap;

    acquiring a normal reception rate S′

    of the wireless signals per a fixed channel use time, from the transmission and reception history in the prescribed wireless station; and

    evaluating a degree of the exposed situation in reception according to a ratio of the normal reception rate S′

    to the normal reception rate S, such that the degree of the exposed situation in reception is larger as the ratio decreases.

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