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Abstract
In this paper, we propose a trajectory-aware handoff algorithm based on position, velocity, signaling delay, and receive signal strength (RSS) of mobile terminal (MT). In order to provide seamless service in modern heterogeneous networks, handoff of the MT should be initiated with correct timing. In our algorithm, velocity of MT is divided into two parts as radial velocity and tangential velocity. For more precise handoff initiation, tangential velocity of MT is neglected, and only radial velocity of MT is considered in handoff decision making. Moreover, before handoff decision, least square line method is applied to RSS of MT to avoid unnecessary back-and-forth handoffs (ping-pong handoffs) between different services. A simulation is provided to compare the proposed algorithm with other various handoff methods, and the results prove this algorithm to have outperformed others.
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Acknowledgment
This work was supported by the national natural science foundation of China under grant no. 60572047 and by the program for New Century Excellent Talents in University, NCET-06-0642.
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Department of Electronics and Information Engineering, Huazhong University of Science and Technology, Wuhan, China
Thazin Ei & Furong Wang
- Thazin Ei
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Correspondence toThazin Ei orFurong Wang.
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Ei, T., Wang, F. A trajectory-aware handoff algorithm based on GPS information.Ann. Telecommun.65, 411–417 (2010). https://doi.org/10.1007/s12243-009-0141-y
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