上行同步的维持是根据收到的下行链路的定时，发送上行链路定时提前量来实现的。
Uplink synchronization is maintained in 1.28 Mcps TDD by sending the uplink advanced in time with respect to the timing of the received downlink.
无线测量集中在移动台与基站之间，主要测量信号电平、信号质量、定时提前量等等。
Wireless measurements occur between MS and BTS and the major measurement parameters include signal level, signal quality, time advance and so on.
无线测量集中在移动台与基站之间，主要测量信号电平、信号质量、定时提前量等等。
Wireless measurements occur between MS and BTS and the major measurement parameters include signal level, signal quality, time advance and so on.
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