Networking and Communication Engineering

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Improvement of Handoff Latency by GPS Based Handoff Technique


Affiliations
1 Jadavpur University, Department of Electronics & Telecommunication Engineering, India
2 Institute of Engineering & Management, Department of Electronics & Telecommunication, India
3 jadavpur University, Department of Electronics & Telecommunication, India
4 Jadavpur University, Department of Electronics & Telecommunication, India
5 Kalyani University, Department of Electronics & Telecommunication, India
     

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Presently IEEE 802.11b based wireless networks are being widely used in various fields like personal as well as business applications. Handoff is a critical issue in IEEE 802.11b based wireless networks. When a mobile node (MN) moves away from the range of its current access point (AP) it needs to perform a link layer handoff. This causes data loss and interruption in communication. According to IEEE 802.11b link layer2 (L2) handoff consists of three phases – scanning, authentication and re-association. Scanning process delay is 90% of the total handoff delay. So in this paper we propose a better scanning mechanism to reduce handoff latency. Using GPS we determine the direction of velocity of the MN as well as position. It reduces the time to find the closest and best AP among all neighbor APs. This process effectively reduces the handoff latency.

Keywords

IEEE 802.11b, Handoff Latency, GPS (Global Positioning System), Direction of Velocity of MN, Neighbor APs, Mobile Node (MN).
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  • Improvement of Handoff Latency by GPS Based Handoff Technique

Abstract Views: 222  |  PDF Views: 3

Authors

Debabrata Sarddar
Jadavpur University, Department of Electronics & Telecommunication Engineering, India
Shubhajeet Chatterjee
Institute of Engineering & Management, Department of Electronics & Telecommunication, India
Ramesh Jana
jadavpur University, Department of Electronics & Telecommunication, India
Mandovi Mukherjee
Jadavpur University, Department of Electronics & Telecommunication, India
Sreya Mallik
Jadavpur University, Department of Electronics & Telecommunication, India
Utpal Biswas
Kalyani University, Department of Electronics & Telecommunication, India
M. K. Naskar
Jadavpur University, Department of Electronics & Telecommunication, India

Abstract


Presently IEEE 802.11b based wireless networks are being widely used in various fields like personal as well as business applications. Handoff is a critical issue in IEEE 802.11b based wireless networks. When a mobile node (MN) moves away from the range of its current access point (AP) it needs to perform a link layer handoff. This causes data loss and interruption in communication. According to IEEE 802.11b link layer2 (L2) handoff consists of three phases – scanning, authentication and re-association. Scanning process delay is 90% of the total handoff delay. So in this paper we propose a better scanning mechanism to reduce handoff latency. Using GPS we determine the direction of velocity of the MN as well as position. It reduces the time to find the closest and best AP among all neighbor APs. This process effectively reduces the handoff latency.

Keywords


IEEE 802.11b, Handoff Latency, GPS (Global Positioning System), Direction of Velocity of MN, Neighbor APs, Mobile Node (MN).