Hierarchical cell structure is an effective solution to guarantee continuous coverage

to improve system capacity

and to provide better service for users with different mobility. This paper discusses CDMA(Code Division Multiple Access) system performance with Hierarchical cell structure and analyzes handover strategy with one-dimensional Markov model in micro-layer and iwo-dimensional Markov model in macro-layer. Capacity of CDMA system is related to interference level because of its self-interference characteristic. So the state space of Markov models adopted by us are unlimited. Moreover

considering priority of handover users and justice of users with different mobility

multi-level admission thresholds are set in system for different useis.The impact of the amount of reserved resource on system performance is also analyzed in this paper.