That is, a channel guard is ready if and only if the process at the other end of the channel has output to it and this data has not yet been input by this process.
也就是说，只有在通道另一端的进程已经输出数据，而该数据还没有被进程输入的时候，警卫才就绪。
When a GPRS MS in READY state USES DRX, DRX has to be considered when assigning a packet data channel for downlink transfer.
当一个READY状态的MS使用了DRX, DRX将在为下行数据传递分配数据包信道的时候被考虑进去。
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