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2010 Asia-Pacific Conference on Information Theory (APCIT 2010 E-BOOK)

Xi'an,China,10.1-10.2,2010

ISBN: 978-1-935068-47-1 Scientific Research Publishing, USA

E-Book 506pp Pub. Date: November 2010

Category: Computer Science & Communications

Price: $80

Title: MAC Layer Fast Handoff Scheme for WMN under Urban Mass Transit Condition
Source: 2010 Asia-Pacific Conference on Information Theory (APCIT 2010 E-BOOK) (pp 83-87)
Author(s): Shan Liu, Dept of Electronic and Information Engineering, BJTU, Beijing, China
Taorui Su, Strix Systems China Office, Beijing, China
Abstract: Wireless Mesh Network (WMN) has found its use under urban mass transit condition in recent years. In this paper, the MAC layer fast handoff for IEEE 802.11-based WMN was studied. Two types of im- provement were proposed for MAC layer fast handoff algorithm, including selective background scanning and buffer mechanism. There, selective scanning reduces the number of channels to be scanned; background scanning allows the mobile Mesh client to perform channel scanning prior to handoff process; buffer mecha- nism allows a certain amount of packets to be buffered while the Mesh client is scanning a different channel or the network breaks. The proposed scheme can significantly reduce the scanning time, as well as the packet loss, and maintain a constant data rate. Tests have been conducted to evaluate the performance of the pro- posed scheme. Test results for this scenario show that the handoff latency can be limited within 10ms and even shorter.
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