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User mobility in wireless data networks is increasing because oftechnological advances and the desire for voice and multimedia applications.These applications, however, require fast handoffs between base stations tomaintain the quality of the connections. In this paper, the authors describethe use of novel and efficient data structure which dynamically allocates guardchannel for handoffs and introduces the concept of channel borrowing strategy.The proposed scheme allocates the guard channels for handoff requestsdynamically, based on the traffic load for certain time period. A neworiginating call in the cell coverage area also uses these guard channels ifthey are unused. Our basic idea is to allow Guard channels to be shared betweennew calls and handoff calls. This approach maximizes the channel utilization.The simulation results prove that the channel borrowing scheme improves theoverall throughput.

Efficient Utilization of Channels Using Dynamic Guard Channel Allocation with Channel Borrowing Strategy in Handoffs