Downlink performance of cell-partitioned CDMA cellular systems with time-slot assignment

There have been studies to divide CDMA cellular systems in the frequency, time, and space domains to enhance the system capacity and improve the system efficiency under nonuniform traffic conditions. This paper describes a cell-partitioned CDMA system in which the time slots are assigned to several subareas in a cell. These time slots are assigned according to different patterns in the adjacent cells. The downlink system capacity increased by about 15% under a uniform traffic distribution. Evaluation using a hot-spot model showed that the downlink quality improved when cells were adaptively partitioned according to the traffic distribution.