계층셀구조에서 계층별 큐를 이용한 핸드오프 강제종료의 개선방안

Improvement of Handoff dropping by Separate Queue in Hierarchical Cellular System

In this paper, we proposed separate queue scheme in each hierarchical cell for effective use of wireless channel. This method reduces the blocking rate of high speed mobile station’s handoff in hierarchical cellular systems. Basically for the high speed mobile stations channels are allocated in macrocell and for the low speed mobile stations channels are allocated in microcell. In order to reduce the rate of forced handoff termination, some reservation channels are employed for the fast handoff calls in the macrocells. And the queue is located in each cell to be able to store handoff requests and takeback requests. The overflowed mobile stations are able to perform takeback as soon as a corresponding channel is available.