Method and apparatus for transmitting and receiving control channels by restricting a set of the control channels in a wireless communication system
First Claim
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1. A method for wireless communication by a base station, the method comprising:
- receiving, from a terminal, a channel quality indicator (CQI);
determining at least one control channel element (CCE) for a physical downlink control channel (PDCCH) based on the received CQI and an identifier (ID) of the terminal; and
transmitting, to the terminal, control information on the PDCCH including the determined at least one CCE,wherein the PDCCH is selected as a control channel candidate from among a set of control channel candidates,wherein the set of control channel candidates is determined based on the ID of the terminal, andwherein a number of the at least one CCE is determined to be one, two, four, or eight based on the CQI.
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Abstract
A method and apparatus are provided for transmitting control information in a base station for a wireless communication system. The method includes receiving, from a terminal, a channel quality indicator (CQI); determining at least one control channel element (CCE) for a physical downlink control channel (PDCCH) based on the received CQI and an identifier (ID) of the terminal; and transmitting, to the terminal, control information on the PDCCH including the determined at least one CCE. A number of the at least one CCE is determined based on the CQI.
32 Citations
12 Claims
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1. A method for wireless communication by a base station, the method comprising:
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receiving, from a terminal, a channel quality indicator (CQI); determining at least one control channel element (CCE) for a physical downlink control channel (PDCCH) based on the received CQI and an identifier (ID) of the terminal; and transmitting, to the terminal, control information on the PDCCH including the determined at least one CCE, wherein the PDCCH is selected as a control channel candidate from among a set of control channel candidates, wherein the set of control channel candidates is determined based on the ID of the terminal, and wherein a number of the at least one CCE is determined to be one, two, four, or eight based on the CQI. - View Dependent Claims (2, 3)
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4. A method for wireless communication by a terminal, the method comprising:
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transmitting, to a base station, a channel quality indicator (CQI); receiving information associated with a number of orthogonal frequency division multiplexing (OFDM) symbols carrying a physical downlink control channel (PDCCH); determining a set of control channel candidates based on an identifier (ID) of the terminal and the received information; and monitoring at least one control channel candidate from the set of control channel candidates in order to receive control information, wherein the at least one control channel candidate comprises at least one control channel element (CCE) for the PDCCH, and wherein a number of the at least one CCE is determined to be one, two, four, or eight. - View Dependent Claims (5, 6)
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7. An apparatus for wireless communication, the apparatus comprising:
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a scheduler configured to receive, from a terminal, a channel quality indicator (CQI), and to determine at least one control channel element (CCE) for a physical downlink control channel (PDCCH) based on the received CQI and an identifier (ID) of the terminal; and a transmission unit configured to transmit, to the terminal, control information on the PDCCH including the determined at least one CCE, wherein the PDCCH is selected as a control channel candidate from among a set of control channel candidates, wherein the set of control channel candidates is determined based on the ID of the terminal, and wherein a number of the at least one CCE is determined to be one, two, four, or eight based on the CQI. - View Dependent Claims (8, 9)
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10. An apparatus for wireless communication, the apparatus comprising:
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a reception unit configured to receive information associated with a number of orthogonal frequency division multiplexing (OFDM) symbols carrying a physical downlink control channel (PDCCH); a set determiner configured to determine a set of control channel candidates based on an identifier (ID) of the apparatus and the received information; and a transmission unit configured to transmit, to a base station, a channel quality indicator (CQI), wherein the reception unit is further configured to monitor at least one control channel candidate from the set of control channel candidates in order to receive control information, wherein the at least one control channel candidate comprises at least one control channel element (CCE) for the PDCCH, and wherein a number of the at least one CCE is determined to be one, two, four, or eight. - View Dependent Claims (11, 12)
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Specification