Terminal device, base station device, and method
Provided are a terminal device, a base station device, and a method that make it possible to communicate efficiently in a communication system in which a base station device and a terminal device communicate. The terminal device communicates with the base station device and is provided with a higher layer processing unit that expands a Ci field based on a MAC CE when a secondary cell list is expanded via RRC signalling.
1. A terminal device comprising:
a higher layer processor configured to perform an addition of one or more secondary cells through a radio resource control (RRC) signaling,
receive an activation/deactivation medium access control control element (MAC CE), the activation/deactivation MAC CE including a plurality of C-fields and one R-field, the respective C-fields indicating secondary cells for respective secondary cell indices i to be activated or deactivated,
perform activation or deactivation for the respective secondary cells according to the respective C-fields; wherein
a number of the C-fields increases such that the size of the activation/deactivation MAC CE increases from one octet to two or more octets in a case that a number of the secondary cell(s) is increased over a predetermined number due to the addition.
2. A communication method for a terminal device comprising:
performing an addition of one or more secondary cells through a radio resource control (RRC) signaling;
receiving an activation/deactivation medium access control control element (MAC CE), the activation/deactivation MAC CE including a plurality of C-fields and one R-field, the respective C-fields indicating secondary cells for respective secondary cell indices i to be activated or deactivated; and
performing activation or deactivation for the respective secondary cells according to the respective C-fields; wherein
a number of the C-fields increases such that the size of the activation/deactivation MAC CE increases from one octet to two or more octets in a case that a number of the secondary cell(s) is increased over a predetermined number due to the addition.