Method for transmitting downlink control signal
First Claim
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1. A method of transmitting a downlink control signal by a base station, the method comprising:
- determining a transmission format among multiple transmission formats for the downlink control signal including scheduling information for a downlink data transmission, wherein a smallest time-frequency resource element is defined by one subcarrier in a frequency domain and one orthogonal frequency division multiplexing (OFDM) symbol in a time domain, wherein each of the multiple transmission formats is defined such that the downlink control signal is transmitted by a unit whose size corresponds to a multiplication of an integer value, differently determined for each of the multiple transmission formats, by a predetermined frequency domain size unit for transmitting the downlink control signal, wherein the predetermined frequency domain size unit used for transmitting the downlink control signal is predetermined to comprise a plurality of the smallest time-frequency resource elements arranged in the frequency domain at one OFDM symbol;
transmitting the downlink control signal in accordance with the determined transmission format to each of a plurality of user equipment; and
transmitting downlink data to each of the plurality of user equipment according to the scheduling information of the downlink control signal.
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Abstract
A method of transmitting a downlink control signal is disclosed, by which localized allocation and distributed allocation are efficiently used in transmitting a downlink control signal. The present invention includes multiplexing the downlink control signal in a manner of if there exists downlink data transmission to a prescribed UE, applying localized allocation to a transmission of the downlink control signal including the scheduling information on the uplink data transmission of the UE and applying distributed allocation to another transmission of the downlink control signal and transmitting the multiplexed downlink control signal.
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Citations
13 Claims
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1. A method of transmitting a downlink control signal by a base station, the method comprising:
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determining a transmission format among multiple transmission formats for the downlink control signal including scheduling information for a downlink data transmission, wherein a smallest time-frequency resource element is defined by one subcarrier in a frequency domain and one orthogonal frequency division multiplexing (OFDM) symbol in a time domain, wherein each of the multiple transmission formats is defined such that the downlink control signal is transmitted by a unit whose size corresponds to a multiplication of an integer value, differently determined for each of the multiple transmission formats, by a predetermined frequency domain size unit for transmitting the downlink control signal, wherein the predetermined frequency domain size unit used for transmitting the downlink control signal is predetermined to comprise a plurality of the smallest time-frequency resource elements arranged in the frequency domain at one OFDM symbol; transmitting the downlink control signal in accordance with the determined transmission format to each of a plurality of user equipment; and transmitting downlink data to each of the plurality of user equipment according to the scheduling information of the downlink control signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of receiving a downlink control signal by a user equipment, the method comprising:
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receiving, from a base station, the downlink control signal including scheduling information for a downlink data transmission; trying to decode the downlink control signal in a unit whose size corresponds to an integer multiple selected from among predetermined multiple integer values, by a predetermined frequency domain size unit used for transmitting the downlink control signal, wherein the predetermined multiple integer values correspond to integer values of multiple downlink control signal transmission formats, wherein a smallest time-frequency resource element is defined by one subcarrier in a frequency domain and one orthogonal frequency division multiplexing (OFDM) symbol in a time domain, wherein the predetermined frequency domain size unit used for transmitting the downlink control signal is predetermined to comprise a plurality of the smallest time-frequency resource elements arranged in the frequency domain at one OFDM symbol; and receiving downlink data from the base station according to the scheduling information of the downlink control signal. - View Dependent Claims (9, 10, 11, 12, 13)
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Specification