摘要
研究一种针对WCDMA数据用户的下行链路分级SIR和速率指配算法,其中数据用户的QoS通过时延、误码率以及描述吞吐量和数据用户之间公平性的一族效用函数来表示。算法具有分级控制结构,容易以分布式的形式实现。移动台根据用户特定的本地信息独立地调整SIR目标,而基站根据来自各移动台的有限的反馈信息,同时调整各用户的数据速率。仿真结果表明,通过选择适当的效用函数可以在系统的总吞吐量和公平性之间得到一个灵活的折衷。
In this paper, we study a hierarchical SIR and rate assigment algorithm on the downlink for WCDMA data users. The QoS for data users is specified by delay and error rate constraints as well as a family of utility functions representing the throughput and fairness among data users. The algorithm has a hierarchical structure and can be easily implemented in a distributed manner. Mobiles independently adjust the SIR targets according to the user specific local information, and the base station adjust the data rates jointly for all the data users based on limited feedback information from the mobiles. The simulation results show that a flexible tradeoff between total system throughput and fairness can be achieved by choosing appropriate utility functions.
出处
《通信学报》
EI
CSCD
北大核心
2003年第4期41-47,共7页
Journal on Communications