1. 2 South Taibai Road, Xi’an Shaanxi, 710071, P.R.China
December 2017
Associated Congestion Avoidance Method Based on Dynamic Adjustment of Beacon Interval.
Date:
Authors:
Name
Affiliation
Address
Phone
Hongyan Li
Xidian University
2 South Taibai Road, Xi’an Shaanxi, , P.R.China  
Qin Liu
Peng Ding
Dongtao Cai
Weiting Zhai
Hongyan Li, et al. (Xidian)

2. December 2017
Background
The process of association and authentication is one of the core technologies of Wireless Local Area Networks(WLAN) Communication.
In the infrastructure BSS network, the station must first be associated with the access point in order to obtain network services. However, when the number of stations is very large, there will be a large number of stations associated with an access point at the same time, which is likely to lead to network congestion, and the low access success rat.
In this case, the usual solution is to manually modify the Beacon Interval time parameter by the administrator.
Hongyan Li, et al. (Xidian)

3. December 2017
Associated Congestion Avoidance Method Based on Dynamic Adjustment of Beacon Interval.
Step 1: Set the timer and timer on AP side, respectively, to record the duration of Beacon Interval in next time and this time;
Hongyan Li, et al. (Xidian)

4. December 2017
Associated Congestion Avoidance Method Based on Dynamic Adjustment of Beacon Interval
Step 2: Set two counters and on the AP side, respectively, to record the number of STA that associated with AP successful in this and the last Beacon Interval;
Hongyan Li, et al. (Xidian)

5. December 2017
Associated Congestion Avoidance Method Based on Dynamic Adjustment of Beacon Interval
Step 3: At the end of each Beacon Interval, perform a dynamic adjustment of Beacon Interval. Compare and If < , will be adjusted to , if , it will be adjusted to The dynamic adjustment expression is
where, k is the adjustment factor and the value is from 0 to 0.1.
Hongyan Li, et al. (Xidian)

6. December 2017
Associated Congestion Avoidance Method Based on Dynamic Adjustment of Beacon Interval
Step 4: After performing the dynamic adjustment of Beacon Interval, modify the AP-side parameter and adjust it as follows:
Hongyan Li, et al. (Xidian)

7. December 2017
Conclusion
This method changes the association process, in which the Beacon Interval is a fixed value, and dynamically adjusts the value of the next Beacon Interval according to the difference between the two numbers of STAs that successfully associated with the AP in two Beacon Intervals, so that the number of the STAs that will associate with the AP can be increased in the next Beacon Interval.
Hongyan Li, et al. (Xidian)