Method for transmitting and receiving signals in consideration of time alignment timer and user equipment for the same
AssigneeLG Electronics Inc.
InventorsSun Jung PARK, Seung June YI, Young Dae LEE, Sung Duck CHUN
Life of this patent
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Abstract
A method for transmitting and receiving signals in consideration of a time alignment timer and user equipment (UE) for the same are provided. In this method, a UE performs initial transmission or retransmission of an uplink signal using wireless resources corresponding to an uplink grant signal received from a base station only when a time alignment timer of the UE is running. The UE does not transmit a HARQ feedback signal for a downlink signal received from the base station to the base station when the time alignment timer of the UE is not running.
Claims14
A method for a terminal to transmit an uplink signal, the method comprising:
- receiving a time alignment command from a base station;
- running a time alignment timer for a predetermined time after the time alignment command is received;
- receiving an uplink grant signal from the base station;
- and
- performing an initial transmission or a retransmission of the uplink signal using a wireless resource corresponding to the uplink grant signal only when the time alignment timer is running.
A method for a terminal to receive a downlink signal, the method comprising:
- receiving a time alignment command from a base station;
- running a time alignment timer for a predetermined time after the time alignment command is received;
- receiving a downlink allocation signal from the base station;
- receiving a downlink signal through a wireless resource corresponding to the downlink allocation signal;
- and
- transmitting HARQ feedback information according to a result of the reception of the downlink signal to the base station only when the time alignment timer is running.
A terminal for transmitting an uplink signal, the terminal comprising:
- a physical layer module including a reception module that receives a time alignment command and an uplink grant signal from a base station and a transmission module that performs an initial transmission or a retransmission of an uplink signal;
- and
- a MAC layer module that controls a time alignment timer to run for a predetermined time from a time at which the time alignment command is received by the reception module and controls the transmission module to perform the initial transmission or the retransmission of the uplink signal using the wireless resource corresponding to the uplink grant signal only when the time alignment timer is running.
A terminal for receiving a downlink signal, the terminal comprising:
- a physical layer module including a reception module that receives a time alignment command and a downlink allocation signal from a base station and receives a downlink signal from the base station through wireless resources corresponding to the downlink allocation signal and a transmission module that transmits HARQ feedback information according to a result of the reception of the downlink signal;
- and
- a MAC layer module that controls a time alignment timer to run for a predetermined time from a time at which the time alignment command is received by the reception module and controls the transmission module not to transmit the HARQ feedback information when the time alignment timer is not running.
Dependencies are inferred from the claim text.