User equipment, a base station, and methods for a physical uplink control channel on one or more serving cells

A method by a base station (BS), comprising:

• transmitting, to a user equipment (UE), Timing Advance Command Medium Access Control (MAC) Control Element (CE);
• and
• considering that the UE releases one or more scheduling request configurations for one or more serving cells, upon receiving a release request from a lower layers of the UE, wherein
• the release request is notified, to the lower layer of the UE, by a MAC entity of the UE (i) in a case that a time alignment timer expires, the time alignment timer is associated with a secondary timing advance group (sTAG), or (ii) in a case that a time alignment timer expires, the time alignment timer is associated with a primary timing advance group (pTAG).

A user equipment (UE), comprising:

• a processing circuitry configured and/or programmed to:
• receiving by a RRC entity of the UE, a release request from a lower layer of the UE;
• and
• releasing one or more scheduling request configurations for one or more serving cells, upon receiving the release request from the lower layers of the UE, wherein
• the release request is notified by a Medium Access Control (MAC) entity of the UE (i) in a case that a time alignment timer expires, the time alignment timer is associated with a secondary timing advance group (sTAG), or (ii) in a case that a time alignment timer expires, the time alignment timer is associated with a primary timing advance group (pTAG).

A base station (BS), comprising:

• a processing circuitry configured and/or programmed to:
• transmitting, to a user equipment (UE), Timing Advance Command Medium Access Control (MAC) Control Element (CE);
• and
• considering that the UE releases one or more scheduling request configurations for one or more serving cells, upon receiving a release request from a lower layers of the UE, wherein
• the release request is notified, to the lower layer of the UE, by a MAC entity of the UE (i) in a case that a time alignment timer expires, the time alignment timer is associated with a secondary timing advance group (sTAG), or (ii) in a case that a time alignment timer expires, the time alignment timer is associated with a primary timing advance group (pTAG).