An efficient least congested distributed channel selection algorithm with associated and interfering stations in WLAN

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Ashish Kumar
Dr. M. Nandhini


WLAN is widely used network that provides high data rate with less cost but channel assignment is major challenge for minimization of interference in IEEE 802.11 architecture. For that researchers have studied channel allocation schemes for this scenarios, these schemes are centralized and distributed as well. Various distributed channel selection schemes, where APs (access points) is responsible for selecting least congested channels among all available channels. However, the existing distributed channel selection schemes use only interfering STA (Station) to calculating least congested channel, but they are not considering the existence of associated stations with any particular AP that might affect the congestion in the network. In this paper, a distributed least channel selection algorithm is proposed which is in the basis of minimum interfering STAs as well as associated STAs by exchanging the beacon frames with neighbor APs. An additional optional field is defined in the frame for exchanging the information using beacon frame according to the IEEE 802.11 standard.

Keywords- Distributed channel allocation, Beacon frame, probe request/response frame, active channel scanning, IEEE 802.11 Standard.


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