GSM Switching, Services and Protocols
GSM Switching, Services and Protocols
Antennas and Propagation for Wireless Communication Systems
Antennas and Propagation for Wireless Communication Systems
Modeling and Analysis of Fast Handoff Algorithms for Microcellular Networks
MASCOTS '02 Proceedings of the 10th IEEE International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunications Systems
A speed-aware handover system for wireless cellular networks based on fuzzy logic
Mobile Information Systems
A Fuzzy-Based Handover System for Wireless Cellular Networks: A Case Study for Handover Enforcement
NBiS '08 Proceedings of the 2nd international conference on Network-Based Information Systems
TSA: time series adaptation for enhanced cell reselection in UMTS
ICT'09 Proceedings of the 16th international conference on Telecommunications
Mobile Information Systems
A fuzzy-based speed-aware handoff system for wireless cellular networks
NBiS'07 Proceedings of the 1st international conference on Network-based information systems
Proceedings of the 6th International Wireless Communications and Mobile Computing Conference
Journal of Mobile Multimedia
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When a mobile station moves, the path loss and shadow fading contribute to the large-scale variation in the received signal strength. The variation of signal strength caused by shadow fadings is a random process, and handover decision mechanisms based on measurements of signal strength induce the "ping-pong effect.驴 This paper proposes an improved handover algorithm, based on the estimates of location and velocity of the mobile station, to suppress the ping-pong effect in cellular systems. A practical approach based on GSM measurement data is used to estimate the location and velocity of mobile station to identify the correlation among shadowing components. The impact of location errors on handover performance was examined, and the proposed handover algorithm was applied to a real GSM system in urban Taipei city. The results indicate that the number of unnecessary handover can be reduced 18-26 percent by the proposed approach, compared to the conventional method, while the signal outage probability remains similar. Besides, the computational complexity of the proposed algorithm is low, and the algorithm does not use a database or lookup table.