改进的正比公平调度算法

Improved proportional fair scheduling algorithm

3GPP从R6版本开始,开展了对高速上行分组接入(HSUPA)技术的研究和标准制定工作。基于基站(NodeB)的调度算法是HSUPA的三大技术之一,对它的研究能有效地改善HSUPA系统性能,使系统的上行资源得以更充分的利用。在简述HSUPA中基于NodeB的典型调度算法的基础上,它针对用户的公平性给出了三种改进的正比公平调度算法,并在吞吐量和公平性上与典型调度算法进行仿真对比,仿真验证了当各个信道的衰落特性差别很大时,与正比公平调度算法相比,改进的正比公平调度算法有效地提高了用户的公平度,改善了系统性能。

From release6,3GPP has launched the research and standard-setting work for High-Speed Uplink Packet Access（HSUPA）.As one of the three important technologies for HSUPA,the scheduling algorithm based on NodeB can improve the performance of HSUPA effectively and make a good use of the uplink resource.It summarizes several classic fast scheduling algorithms based on NodeB for HSUPA,and gives three improved proportional fair scheduling algorithm for fairness of UE.It is compared with typical scheduling algorithms in throughput and fairness by simulation.When fading characteristics of each channel is very different,compared with proportional fair scheduling algorithm,the simulation results prove that improved proportional fair scheduling algorithm could improve fairness of UE.Further it improves system performance effectively.