A Cross-Layer (Layer 2 + 3) Handoff Management Protocol for Next-Generation Wireless Systems
IEEE Transactions on Mobile Computing
Wireless Personal Communications: An International Journal
A speed-aware handover system for wireless cellular networks based on fuzzy logic
Mobile Information Systems
A method for minimizing unnecessary handovers in heterogeneous wireless networks
WOWMOM '08 Proceedings of the 2008 International Symposium on a World of Wireless, Mobile and Multimedia Networks
IEEE Wireless Communications
Movement-Aware Vertical Handoff of WLAN and Mobile WiMAX for Seamless Ubiquitous Access
IEEE Transactions on Consumer Electronics
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In this paper, we propose a trajectory-aware vertical handoff algorithm based on position, velocity, signaling delay and receive signal strength (RSS) of 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 proves this algorithm to have outperformed others.