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Optimum transmitter power control in WCDMA cellular systems

机译:WCDMA蜂窝系统中的最佳发射机功率控制

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摘要

Power control is an important technique in WCDMA mobile systems for both increasing system capacity and guaranteeing the required QoS (time delay and wireless link transmission quality) of multimedia services. The optimum power control for narrow band CDMA cellular systems is a problem of single threshold optimization. Because these systems have only one type of traffic and have the same QoS requirement. However, WCDMA mobile systems should provide multimedia services and different types of traffic have different QoS requirements. Thus, the power control in WCDMA mobile systems doesn't be a problem of single threshold optimizing, but turns into the optimizing problem of multi — thresholds. In this paper, we analyze the power control problem in WCDMA cellular mobile systems and propose the optimum transmitter power control algorithm. Three criteria to optimize transmitter power levels of multithresholds based on grading the priority orders of multimedia services are proposed. Simulation results show that the propoeed algorithms are more effective than conventional algorithms and can provide better performance for WCDMA cellular mobile systems.
机译:功率控制是WCDMA移动系统中的一项重要技术,它既可以提高系统容量,又可以保证多媒体服务所需的QoS(时延和无线链路传输质量)。窄带CDMA蜂窝系统的最佳功率控制是单阈值优化的问题。因为这些系统只有一种流量,并且具有相同的QoS要求。但是,WCDMA移动系统应提供多媒体服务,并且不同类型的流量具有不同的QoS要求。因此,WCDMA移动系统中的功率控制不是单阈值优化的问题,而是多阈值的优化问题。在本文中,我们分析了WCDMA蜂窝移动系统中的功率控制问题,并提出了最佳的发射机功率控制算法。提出了基于对多媒体业务的优先级进行分级来优化多阈值发射机功率水平的三个标准。仿真结果表明,提出的算法比常规算法更有效,可以为WCDMA蜂窝移动系统提供更好的性能。

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