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中文摘要：
负荷控制是第三代移动通信无线资源管理RRM（radio resource management）的一个重要内容，能够为系统内移动用户提供业务质量保证。阐述了TD—SCDMA系统的负荷控制机制，提出了一种改进的“联合”负荷控制算法。该算法基于现有协议标准，让过载判断在基站端执行，过载解决在无线网络控制器RNC（radio network controller）中进行，通过时间窗测量各时隙内过载情况，让服务质量较差的用户主动掉话。通过仿真表明，该算法能够降低系统的误码率，提高整体系统的通信质量。
英文摘要：
As one of important parts of RRM （radio resource management） in 3G ,load control can provide QOS （quality of serv- ice） assurance for all users. Based on TD - SCDMA uplink , this paper elaborates the principles of load control, and proposes a ＂Joint＂ scheme based on existing standards, in which overload judgement is executed at base station while overload resolution is executed at RNC（ radio network controller）. Time window is employed to measure the load of time slots, the bad users are dropped actively. It is found from the emulation that lower bit error rate is achieved at receiving end by using the algorithm and so the communication quality of system is well improved.
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