Methods, systems, and devices for wireless communication are described. The base station may configure a set of timing adjustment groups (TAGs) and a set of PUCCH cell groups for the user equipment (UE). Serving cells in TAGs may be associated with different PUCCH cell groups. The UE may initiate a time alignment timer for each TAG, and if the timer expires prior to receiving the time adjustment command, the UE may determine a subset of serving cells based on an association between TAGs and PUCCH cell groups Lt; RTI ID = 0.0 a / RTI
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机译：描述了用于无线通信的方法，系统和设备。基站可以为用户设备（UE）配置一组定时调整组（TAG）和一组PUCCH小区组。 TAG中的服务小区可以与不同的PUCCH小区组相关联。 UE可以为每个TAG发起时间对准定时器，并且如果该定时器在接收时间调整命令之前到期，则UE可以基于TAG与PUCCH小区组Lt之间的关联来确定服务小区的子集; RTI = 0.0> a
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