Fast Handover Scheme Based on Mobile Locations for IEEE 802.16e Networks

摘要

The IEEE 802.16 is developed for fixed broadband wireless technology with wider coverage, higher data transmission speeds and excellent Quality of Services (QoS). IEEE 802.16e is an amendment to the IEEE 802.16 that corporates the handover process to support mobility under high speeds. The mobility user basically conducts hard handover process after the MS terminates the connection with the serving Base Station (BS). During handover process, Mobile Station (MS) releases its connections with serving BS, and sets up connections with the target BS. It can cause the serious problems that user suffer traffic interruption, packet delay and loss during handover process. To resolve this problem, we propose a scheme for reducing unnecessary association procedure by evaluating mobile locations. The proposed scheme offers application QoS requirements and can reduce the total handover latency. Simulation results show that the proposed scheme has better performance than the conventional method in terms of the packet transmission delay and scanning time; hence, they can reduce handover latency up to 60%.