Capacity analysis of crossed slot in TD-CDMA＼TDD System

Abstract

Traffic asymmetry between uplink and downlink is a remarkable traffic characteristic in cellular mobile multimedia communications. CDMA system with TDD is a good solution for this traffic asymmetry. However, the level of traffic asymmetry may be significantly different from cell to cell. In this case, we use a crossed slot which is against a regular slot. But it can generate large inter-cell interference. To tackle this problem, we employ inner zone in a cell and restrict communication only to inner zone in crossed slots. In this paper, we investigate radius of inner zone and capacity of a crossed slot, when communication range and direction of timeslot in adjacent cells change.