Relay station and method of relay station transmitting backhaul uplink signal
First Claim
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1. A method of a relay station transmitting a backhaul uplink (UL) signal, the method comprising:
- receiving information about a structure of a subframe from a base station,wherein the received information indicates a first subframe structure or a second subframe structure;
allocating a demodulation reference signal (DM-RS), a relay-sounding reference signal (R-SRS) and control information to a backhaul UL subframe on a basis of the received information; and
transmitting the DM-RS, the R-SRS and the control information,wherein the DM-RS and the control information are allocated to symbols other than a first symbol and last 2 symbols of the backhaul UL subframe,wherein when the received information indicates the first subframe structure, the R-SRS is allocated to a second-to-last symbol of the backhaul UL subframe and a sounding reference signal (SRS) is allocated to a last symbol of the backhaul UL subframe, the SRS being a reference signal to be transmitted by a user equipment (UE), andwherein when the received information indicates the second subframe structure, both the R-SRS and the SRS are allocated to a last symbol of the backhaul UL subframe, and the R-SRS and the SRS are mapped to different subcarriers.
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Abstract
A method of a relay station transmitting a backhaul uplink (UL) signal includes receiving information about a structure of a subframe from a base station; allocating a reference signal and control information to the backhaul UL subframe on a basis of the information; and transmitting the reference signal and the control information. The reference signal or the control information is allocated to symbols other than a first symbol and last 2 symbols of the backhaul UL subframe.
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Citations
20 Claims
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1. A method of a relay station transmitting a backhaul uplink (UL) signal, the method comprising:
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receiving information about a structure of a subframe from a base station, wherein the received information indicates a first subframe structure or a second subframe structure; allocating a demodulation reference signal (DM-RS), a relay-sounding reference signal (R-SRS) and control information to a backhaul UL subframe on a basis of the received information; and transmitting the DM-RS, the R-SRS and the control information, wherein the DM-RS and the control information are allocated to symbols other than a first symbol and last 2 symbols of the backhaul UL subframe, wherein when the received information indicates the first subframe structure, the R-SRS is allocated to a second-to-last symbol of the backhaul UL subframe and a sounding reference signal (SRS) is allocated to a last symbol of the backhaul UL subframe, the SRS being a reference signal to be transmitted by a user equipment (UE), and wherein when the received information indicates the second subframe structure, both the R-SRS and the SRS are allocated to a last symbol of the backhaul UL subframe, and the R-SRS and the SRS are mapped to different subcarriers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A relay station, comprising:
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a radio frequency (RF) unit configured to transmit and receive a radio signal; and a processor connected to the RF unit, wherein the processor is configured for; receiving information about a structure of a subframe from a base station, wherein the received information indicates a first subframe structure or a second subframe structure; allocating a demodulation reference signal (DM-RS), a relay-sounding reference signal (R-SRS) and control information to a backhaul UL subframe on a basis of the received information; and transmitting the DM-RS, the R-SRS and the control information, wherein the DM-RS and the control information are allocated to symbols other than a first symbol and last 2 symbols of the backhaul UL subframe, wherein when the received information indicates the first subframe structure, the R-SRS is allocated to a second-to-last symbol of the backhaul UL subframe and a sounding reference signal (SRS) is allocated to a last symbol of the backhaul UL subframe, the SRS being a reference signal to be transmitted by a user equipment (UE), and wherein when the received information indicates the second subframe structure, both the R-SRS and the SRS are allocated to a last symbol of the backhaul UL subframe and the R-SRS and the SRS are mapped to different subcarriers. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification