时片是在研究HSDPA支持流业务时为保证业务质量而第一次引入的术语。时片不仅有着一定的时间长度,而且对应着流业务数据流中可变量的数据。在实际应用中,使用单位时间上的时片个数,即时片率来设计相应的方案来保证流业务的QoS指标

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