Mobile station apparatus
There is a concern that communication failure may occur in a case that the state of a serving cell is not properly managed during communication of SPS or GF. A mobile station apparatus of a communication system including at least a base station apparatus and a mobile station apparatus configured to perform communication by using carrier aggregation that simultaneously uses multiple serving cells configured by the base station apparatus according to an aspect of the present invention, wherein the mobile station apparatus restarts a deactivation timer of a serving cell of the multiple serving cells at a timing indicated by a configured uplink grant configured for the serving cell.
1. A terminal apparatus configured to communicate with a base station apparatus by using a primary cell and a secondary cell, the terminal apparatus comprising:
reception processing circuitry configured to receive downlink data, receive radio resource control (RRC) information including configured uplink grant configuration information for the secondary cell and configured downlink assignment configuration information for the secondary cell, receive downlink control information (DCI), and receive an SCell Activation/Deactivation control element (CE);
transmission processing circuitry configured to transmit uplink data; and
serving cell state managing circuitry configured to:
control an sCellDeactivationTimer with which the secondary cell is configured, and
configure, without scheduling through a physical downlink control channel:
a configured uplink grant based on the configured uplink grant configuration information, and
a configured downlink assignment based on the configured downlink assignment configuration information, wherein
the serving cell state managing circuitry is configured to activate the secondary cell by using the SCell Activation/Deactivation CE and start the sCellDeactivationTimer,
in a case that the transmission processing circuitry transmits the uplink data based on the configured uplink grant, the serving cell state managing circuitry restarts the sCellDeactivationTimer, wherein the serving cell state managing circuitry is configured to configure the configured uplink grant without an activation that uses the DCI.
2. A communication method for a terminal apparatus configured to communicate with a base station apparatus by using a primary cell and a secondary cell, the communication method comprising:
receiving downlink data;
receiving radio resource control (RRC) information including configured uplink grant configuration information for the secondary cell and configured downlink assignment configuration information for the secondary cell;
receiving SCell Activation/Deactivation control element (CE);
receiving downlink control information (DCI):
transmitting uplink data;
controlling an sCellDeactivationTimer with which the secondary cell is configured; and
configuring, without scheduling through a physical downlink control channel:
a configured uplink grant based on the configured uplink grant configuration information, and
a configured downlink assignment based on the configured downlink assignment configuration information, wherein
the secondary cell is activated by using the SCell Activation/Deactivation CE and start the sCellDeactivationTimer,
in a case the uplink data is transmitted based on the configured uplink grant, the sCellDeactivationTimer is restarted, wherein the configured uplink grant is configured without an activation that uses the DCI.