Time alignment timer handling in wireless communications

A user equipment (UE) adapted to operate in a wireless communication system, the UE comprising:

• at least one transceiver:
• at least processor;
• and
• at least one computer memory operably connectable to the at least one processor and storing instructions that, based on being executed by the at least one processor, perform operations comprising:
• receiving a time alignment (TA) configuration:
• starting a TA timer related to the TA configuration for a cell group:
• initiating a transmission of failure information for the cell group based on detecting a failure on the cell group, wherein the TA timer for the cell group expires based on the transmission of the failure information being initiated;
• transmitting the failure information for the cell group:
• receiving a configuration for failure recovery of the failure on the cell group after transmitting the failure information;
• and
• restarting the TA timer related to the TA configuration for the cell group based on receiving the configuration for failure recovery.

A network node adapted to operate in a wireless communication system, the network node comprising:

• at least one transceiver:
• at least processor;
• and
• at least one computer memory operably connectable to the at least one processor and storing instructions that, based on being executed by the at least one processor, perform operations comprising:
• transmitting, to a user equipment (UE), a time alignment (TA) configuration;
• receiving, from the UE, failure information for a cell group on which a failure is detected;
• and
• transmitting, to the UE, a configuration for failure recovery of the failure on the cell group after receiving the failure information,
• wherein a TA timer related to the TA configuration for the cell group expires based on a transmission of the failure information being initiated by the UE, and
• wherein the TA timer related to the TA configuration for the cell group is restarted based on the configuration for failure recovery being received by the UE.