Performance of an efficient method for association admission control in public wireless LAN systems

Abstract

This paper generally relates to the field of wireless local area networks(WLANs), and more particularly, to AP selection and association methods for the performance of a station. In these days, IEEE 802.11 WLAN is widely deployed and used as an emerging service to connect high-speed Internet in the public wireless environment. But, if there are many users in hot spot area, they suffer a severe decrease of performance. Thus it needs an association and access control mechanism especially when it is used in the public environment. In this paper, we suggest an efficient association method using Beacon or Probe Response frames based IEEE 802.11 and analyze the performance of stations(STAs). Station selects AP using the information of the capability region in a Beacon or a Probe Response frame. According to the present paper, an association method for a public WLAN service, which includes a WLAN user terminal and an AP for relaying WLAN communications to and from the user terminal, includes the steps of the user terminal asking the AP's states to access with a radio channel; and the station selects and associates with the AP. Further, it is possible to improve the efficiency of network management.

An Algorithm to Enhance the Network Selection Performance in in an Integrated Umts/Wlan Environment

“…Figure 3 shows the traffic transmission time for all CFPs. From this figure it is evident that since the instant values of the TTT are vastly different, it is not a viable criterion for network selection algorithm as it is used in (Hyun-woo, 2005) for AP selection. Figure 4 shows the cumulative density function of the TTT, when there are 80 users in the WLAN cell.…”

“…However, in this paper it is shown that when the hotspot is congested, UMTS can offer higher bandwidth. Hence considering only RSS is not sufficient and the network traffic load should be considered as an input parameter for network selection algorithm, as the authors in (Hyun-woo, 2005) have used for AP selection. The authors show that advertising the amount of traffic processed in AP can lead to better network performance and fairness among users.…”