Ul out-of-synchronization for a secondary cell carrying pucch

摘要: Methods, systems, and devices are described for uplink synchronization physical control channel (PUCCH) enabled secondary cells (SCells). A UE may be able to determine that with a PUCCH-enabled SCell (“PUCCH-SCell”) is lost initiate synchronization. Additionally or alternatively, base station configured expediently has PUCCH SCell, it Either station, both, depending on particular carrier aggregation dual-connectivity been re-synchronization. In some embodiments, initiating procedure include sending PDCCH order random access preamble an unsynchronization alert message SCell.