A Novel Admission Control for TDD-CDMA

Abstract

The TDD-CDMA system with unbalanced slot allocation between uplink (UL) and downlink (DL) is useful for the traffic asymmetry, but the unbalanced slot will lead to cross-slot interference. This paper proposes a novel admission control algorithm for TDD-CDMA in order to decrease the cross-slot interference. The novel admission control deal with each user in different slots: for user with high transmission power, the algorithm will first allocate the non cross-slot to it; while for user with low transmission power, the algorithm will allocate cross-slot to it. With Monte Carlo method, we simulate the novel admission control algorithm. The simulation results show that this paper proposed admission control has better performance than other admission control in TDD-CDMA. And the performance of proposed admission control is related to transmission power threshold. The proper threshold will determines good system performance