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http://dx.doi.org/10.5392/JKCA.2010.10.6.064

Handoff Improvement Method of an AP Choice for Guarantee of Mobile Node Network Performance according to Speed in Wireless LAN System  

Kim, Dong-Geun (경상대학교 컴퓨터과학부 컴퓨터과학)
Park, Jae-Heung (경상대학교 컴퓨터과학부 컴퓨터과학)
Kim, Sang-Bok (경상대학교 컴퓨터과학부 컴퓨터과학)
Publication Information
The Journal of the Korea Contents Association / v.10, no.6, 2010 , pp. 64-71 More about this Journal
Abstract
When Handoff occurs at wireless network, existing AP search chooses one of various APs according to signal strength information. However, IEEE 802.11 uses Medium Access method with CSMA/CA that competes to obtain a channel by sharing medium. Therefore, network performance is heavily affected by the number of nodes and network congestion aside from signal strength. This scheme presented an additional AP selection indicator and a new handoff algorithm to realize handoff guaranteeing the network performance of mobile node in a process selecting new AP. This indicator is includes a handoff cost function reflecting the network information of mobile node, and the mobile node made handoff guaranteeing the network performance using network information possible by using this. also we classified the nodes into high-speed node and low-speed node. Then, when Handoff occurs, high-speed node was made itself choose AP by signal strength information. We also made the low-speed node choose its AP by using AP network information which is applied area. Hence, we demonstrate through simulation that gets an improvement in performance, even in the wireless network which many users concurrently access to, and it has considerable effects on aspects of resources and network management by distribution of users.
Keywords
IEEE802.11 WLAN; Handoff; CSMA/CA;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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