Method for transmitting and receiving signals in consideration of time alignment timer and user equipment for the same

摘要

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.

主权项

1. A method for a user equipment (UE) to generate a transmission, the method comprising:
starting, by the UE, a time alignment timer when a time alignment command is received; receiving, by the UE, an uplink grant; and generating, by the UE, the transmission according to the uplink grant only when the time alignment timer is running upon receiving the uplink grant, wherein the uplink grant is received through a Physical Downlink Control Channel (PDCCH) indicated by a Cell Radio Network Temporary Identifier (C-RNTI) of the UE.