Wireless Communication

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Minimization of Handoff Latency by Cell Sectoring Method


Affiliations
1 Department of Electronics and Telecommunication Engg, Jadavpur University, Kolkata – 700032, India
2 Department of Electronics and Communication Engg, Institute of Engg. & Managment College, Saltlake, Kolkata-70009, India
3 Jadavpur University, India
4 E&ECE Department, IIT Kharagpur, India
     

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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 performed in three phases – scanning, authentication and re-association. Scanning process causes 90% of the total handoff delay. Throughout the last few years so many researches had been done to reduce the hand off 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. This process effectively reduces the handoff latency.

Keywords

IEEE 802.11, Handoff Latency, GPS (Global Positioning System), Regression, Neighbor APs.
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  • Minimization of Handoff Latency by Cell Sectoring Method

Abstract Views: 159  |  PDF Views: 4

Authors

Debabrata Sarddar
Department of Electronics and Telecommunication Engg, Jadavpur University, Kolkata – 700032, India
Shubhajeet Chatterjee
Department of Electronics and Communication Engg, Institute of Engg. & Managment College, Saltlake, Kolkata-70009, India
Ramesh Jana
Department of Electronics and Telecommunication Engg, Jadavpur University, Kolkata – 700032, India
Shaik Sahil Babu
Department of Electronics and Telecommunication Engg, Jadavpur University, Kolkata – 700032, India
Utpal Biswas
Jadavpur University, India
M. K. Naskar
E&ECE Department, IIT Kharagpur, India

Abstract


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 performed in three phases – scanning, authentication and re-association. Scanning process causes 90% of the total handoff delay. Throughout the last few years so many researches had been done to reduce the hand off 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. This process effectively reduces the handoff latency.

Keywords


IEEE 802.11, Handoff Latency, GPS (Global Positioning System), Regression, Neighbor APs.