On Access Point Selection in IEEE 802.11 Wireless Local Area Networks
2006 (English)In: 31st IEEE Conference on Local Computer Networks, Proceedings 2006, IEEE conference proceedings, 2006, 879-886 p.Conference paper (Refereed)
In wireless local area networks often a station can potentially associate with more than one access point. Therefore, a relevant question is which access point to select "best" from a list of candidate ones. In IEEE 802.11, the user simply associates to the access point with the strongest received signal strength. However, this may result in a significant load imbalance between several access points, as some accommodate a large number of stations while others are lightly loaded or even idle. Moreover, the multi-rate flexibility provided by several IEEE 802.11 variants can cause low bit rate stations to negatively affect high bit rate ones and consequently degrade the overall network throughput. This paper investigates the various aspects of "best" access point selection for IEEE 802.11 systems. In detail, we first derive a decision metric the selection can be based on. Using this metric we propose two new selection mechanisms which are decentralized in the sense that the decision is performed by each station, given appropriate status information of each access point. In fact, only few bytes of status information have to be added to the beacon and probe response frames which does not impose significant overhead. In addition, we show that our mechanism improves station quality of service and better utilizes network resources compared to the conventional one implemented today in IEEE 802.11 devices.
Place, publisher, year, edition, pages
IEEE conference proceedings, 2006. 879-886 p.
IdentifiersURN: urn:nbn:se:kth:diva-136785DOI: 10.1109/LCN.2006.322194ISBN: 1-4244-0419-3OAI: oai:DiVA.org:kth-136785DiVA: diva2:677168
Sixth International Workshop on Wireless Local Networks 2006 (WLN 2006)
QC 201312112013-12-092013-12-092013-12-11Bibliographically approved