Method and apparatus for transmitting an uplink signal by a relay in a wireless communcation system
AssigneeLG Electronics Inc.
InventorHanbyul Seo
Life of this patent
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Abstract
The present invention relates to a wireless communication system, and to a method and apparatus for transceiving an uplink signal by a relay in a wireless communication system. According to the present invention, a scheme, in which the relay may correctly determine a reference resource for channel state information (CSI) calculation, and thus may perform accurate CSI transmission, may be provided. In addition, according to the present invention, a scheme, in which the relay may correctly determine timing for transmitting a sounding reference signal (SRS) based on the instruction of a base station and may perform SRS transmission, may be provided.
Claims15
A method for transmitting Channel State Information (CSI) at a relay in a wireless communication system, the method comprising:
- determining a reference resource for CSI calculation;
- and
- calculating CSI in the reference resource and transmitting the calculated CSI in subframe n to a Base Station (BS),
- wherein the reference resource is located in subframe n−k where k is a smallest value equal to or greater than 4, determined so that subframe n−k corresponds to a subframe configured for transmission from the BS to the relay.
A relay for transmitting Channel State Information (CSI) in a wireless communication system, the relay comprising:
- a reception module for receiving a downlink signal from a Base Station (BS);
- a transmission module for transmitting an uplink signal to the BS;
- and
- a processor for controlling the relay including the reception module and the transmission module,
- wherein the processor is configured to determine a reference resource for CSI calculation, to calculate the CSI in the reference resource, and to transmit the calculated CSI in subframe n to the BS through the transmission module, and
- wherein the reference resource is located in subframe n−k where k is a smallest value equal to or greater than 4, determined so that subframe n−k corresponds to a subframe configured for transmission from the BS to the relay.
A method for transmitting a Sounding Reference Signal (SRS) at a relay in a wireless communication system, the method comprising:
- receiving control information triggering SRS transmission in subframe n from a Base Station (BS);
- determining subframe n+k for SRS transmitting;
- and
- transmitting an SRS in subframe n+k to the BS,
- wherein k is a smallest value equal to or greater than 4, determined so that subframe n+k corresponds to a subframe configured for SRS transmission and a subframe configured for transmission from the relay to the BS.
A relay for transmitting a Sounding Reference Signal (SRS) in a wireless communication system, the relay comprising:
- a reception module for receiving a downlink signal from a Base Station (BS);
- a transmission module for transmitting an uplink signal to the BS;
- and
- a processor for controlling the relay including the reception module and the transmission module,
- wherein the processor is configured to receive control information triggering SRS transmission in subframe n from the BS through the reception module, to determine subframe n+k for SRS transmission, and to transmit an SRS in subframe n+k to the BS through the transmission module, and
- wherein k is a smallest value equal to or greater than 4, determined so that subframe n+k corresponds to a subframe configured for SRS transmission and a subframe configured for transmission from the relay to the BS.
Dependencies are inferred from the claim text.