Method for transmitting and receiving uplink signals, and apparatus therefor
The present invention relates to a method for transmitting an uplink signal in a wireless communication system. The method includes the steps of: transmitting an uplink signal in a first uplink transmitting timing period determined on the basis of a first timing advance command received from a first serving cell; and, when a specific condition is satisfied, transmitting an uplink signal in a second uplink transmitting timing period determined on the basis of a second timing advance command.
1. A method for transmitting, by a user equipment (UE), an uplink (UL) signal in a wireless communication system, the method comprising:
receiving only a single timing advance command from an eNB; and
transmitting an UL signal using a single time advance value according to the single timing advance command or using one of a plurality of predefined timing advance values,
wherein when the UE receives an activation message through a higher layer signaling, the UE transmits the UL signal using a specific timing advance value among the plurality of predefined timing advance values, wherein the specific timing advance value among the plurality of predefined timing advance values is indicated by a virtual cell identifier (VCI), and
wherein when the UE does not receive the activation message or when the UE receives a deactivation message through the higher layer signaling, the UE transmits the UL signal using the single time advance value.
2. The method according to claim 1 ,
wherein the specific timing advance value among the plurality of predefined timing advance values is dynamically indicated.
3. The method according to claim 1 ,
wherein the specific timing advance value among the plurality of predefined timing advance values is indicated by a power control parameter.
4. User Equipment (UE) configured to transmit an uplink (UL) signal in a wireless communication system, the UE comprising:
a Radio Frequency (RF) unit; and
a processor configured to control the RF unit, wherein the processor is configured to:
receive only a single timing advance command from an eNB, and
transmit an UL signal using a single time advance value according to the single timing advance command or using one of a plurality of predefined timing advance values,
wherein when the UE receives an activation message through a higher layer signaling, the UE transmits the UL signal using a specific timing advance value among the plurality of predefined timing advance values wherein the specific timing advance value among the plurality of predefined timing advance values is indicated by a virtual cell identifier (VCI), and
wherein when the UE does not receive the activation message or when the UE receives a deactivation message through the higher layer signaling, the UE transmits the UL signal using the single time advance value.
5. The UE according to claim 4 ,
wherein the specific timing advance value among the plurality of predefined timing advance values is dynamically indicated.
6. The UE according to claim 4 ,
wherein the specific timing advance value among the plurality of predefined timing advance values is indicated by a power control parameter.