有条件退出服务的操作命令仅切换那些不用中断稳定呼叫就可切换的RCS。
A conditional remove operation command switches over only the RCSs that can be switched without dropping stable calls.
一旦系统有空闲信道，且定时器未超时，则切换呼叫可以占用这些空闲信道，接受服务。
When there is free channel in the system and time does not run out, the handoff call can take the free channel and receive service.
实验结果表明相对于GH(保证切换)策略，TGH降低了新呼叫的阻塞率、切换失败率，得到更好的服务质量。
Compared with GH, experiment results show that TGH has the advantage of lower call blocking ratio, handover failure probability and better QoS.
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