TD基站能否不需要时间同步
这是不可能的事情。上下行是时分双工的，UE在监听各个小区的公共信道和共享信道时，必须存在两方面的协调：
１。各个小区上下行帧的协调，各个小区必须要根据时间同步协调好一致的上下行界限，统一发和统一收；
２。同一小区下各个用户的同步协调，否则会出现广播信道接收时序紊乱的情况。
除非在单小区下单用户的场景下，可以不需要，但是这种场景的假设是没有意义的，因为一旦假设了这种场景，很多技术都可以不需要了。
TD最重要的就是时间同步，如果把这个去掉了，不是TD挂了？
个人觉的不可行。
没问题，其实GPS时钟主要作用是同步帧号，如果就是孤零零一个站点不需要切换，没接GPS也是可以正常打业务的。就是只能在这个站点下起呼，但是切不出去～
楼上这个说的很内行
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TD-SCDMA中需要精确的定时保持同步，基站间的必须要保持同步，我理解如果用户不需要切换的话，时间同步是没关系的，基站间保持同步主要是为了能够切换。
学习一下:lol
不只是因为切换需要精确的时间同步，TD就是时分同步，在现网设备中，如果没有GPS，基站侧的载波根本就是不可用的，也就是说，如果没有GPS同步，TD基站的载波和小区根本就不可用，除非将GPS屏蔽掉，但是这样做的后果是该基站不能同其他基站同步，会产生严重干扰！该基站的用户没法和别的基站进行通话！
干扰很严重地！