Minimization of Handoff Latency by Cell Sectoring Method using GPS

• Published in: International journal of computer applications 2011-01, Vol.25 (4), p.22-29
• Main Authors: Sarddar, Debabrata, Chatterjee, Shubhajeet, Biswas, Utpal, Mukherjee, Mandovi, Mallik, Sreya, Mazumder, Pulak, Naskar, Mrinal Kanti
• Format: Article
• Language: English
• Subjects: Delay; Global Positioning System; Links; Local area networks; Measurement methods; Satellite navigation systems; Scanning; Wireless communication
• ISSN: 0975-8887; 0975-8887
• DOI: 10.5120/3020-4084

In this paper, we describe the formatting guidelines for IJCA Journal Submission. Presently, IEEE 802.11 based wireless local area networks (WLAN) have been widely deployed for business and personal applications. The main issue regarding wireless network technology is handoff or hand over management. When a mobile station (MS) moves outside the range of its current access point (AP) it needs to perform a link layer handover. This causes data loss and interruption in communication. According to IEEE 802.11, link layer2 (L2) handoff is performed in three phases - scanning, authentication and re-association. Scanning process causes 90% of the total handoff delay. Throughout the last few years, plenty of researches had been done to reduce the hand off delay by reducing the scanning delay. Here we propose a new scanning technique in which we divide a cell in three sectors and thus reducing the number of APs to be scanned by fixing the neighbour APs with respect to each sector. Thus, we have two fixed APs for each sector. MS will choose the nearest one between them by means of distance measurement method. This process effectively reduces the handoff latency.