【摘要】 CDMA2000 1xEV-DO系统采用均衡公平(Proportional Fair,PF)运算法则,它在确定一个终端何时开始服务时,充分考虑到公平性原则及系统的吞吐量。这一法则可以在保证用户间公平性的条件下提高系统的吞吐量,但不能对不同等级的用户提供不同的服务质量(Quality of Service,QoS)。假设了一种改进的运算法则,并进行了仿真。仿真结果表明,该运算法则可为不同的用户提供不同的吞吐量及QoS,而与此同时,系统的总吞吐量只有轻微衰落。更多还原

【Abstract】 CDMA2000 1xEV-DO adopts the Proportional Fair(PF) algorithm in order to schedule high rate packet data.This scheduling algorithm determines an AT to serve at a specific slot in consideration of the fairness and system throughput.This proportional fair algorithm can improve the system throughput keeping the fairness among users.However,it cannot support differentiated Quality of Service(QoS) among users.A modified scheduling algorithm is proposed and the performance by computer simulations is analyzed.The simulation results show that the proposed scheme can support differentiated QoS among users with slight degradation of system throughput.更多还原