Method for control channel detection in a multicarrier system
First Claim
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1. A method for detecting a control channel in a carrier aggregation system, the method performed by a terminal supporting the carrier aggregation system and comprising:
- receiving a first control signal including carrier information indicating candidate carriers allocated to the terminal among two or more carriers used for the carrier aggregation system;
performing blind decoding on only the candidate carriers among the two or more carriers based on the carrier information to detect the control channel, without blind decoding all of the two or more carriers; and
receiving a second control signal on the detected control channel,wherein a primary carrier of the candidate carriers is blind decoded using a same CCE (Control Channel Element) aggregation level as a legacy terminal which does not support the carrier aggregation system, and one or more secondary carriers of the candidate carriers are blind decoded using aggregation levels adjacent to the aggregation level of the primary carrier, andwherein the first control signal is allocated between a 17th CCE and a (17+N)th CCE, and CCEs between a first CCE and 16th CCE are allocated for both the terminal and the legacy terminal.
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Abstract
The present invention relates to a method and device for reducing the level of blind decoding complexity when detecting a control channel in a broadband wireless access system supporting multicarrier operation. Examples of the present invention disclose methods for the effective blind decoding of a control channel using an explicit method and implicit methods when sending a control channel based on multicarrier operation as with a control channel for transmitting downlink or uplink allocation information under carrier aggregation conditions.
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18 Claims
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1. A method for detecting a control channel in a carrier aggregation system, the method performed by a terminal supporting the carrier aggregation system and comprising:
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receiving a first control signal including carrier information indicating candidate carriers allocated to the terminal among two or more carriers used for the carrier aggregation system; performing blind decoding on only the candidate carriers among the two or more carriers based on the carrier information to detect the control channel, without blind decoding all of the two or more carriers; and receiving a second control signal on the detected control channel, wherein a primary carrier of the candidate carriers is blind decoded using a same CCE (Control Channel Element) aggregation level as a legacy terminal which does not support the carrier aggregation system, and one or more secondary carriers of the candidate carriers are blind decoded using aggregation levels adjacent to the aggregation level of the primary carrier, and wherein the first control signal is allocated between a 17th CCE and a (17+N)th CCE, and CCEs between a first CCE and 16th CCE are allocated for both the terminal and the legacy terminal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 15, 17)
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8. A terminal for detecting a control channel in a carrier aggregation system, the terminal comprising:
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a radio Frequency (RF) module for transmitting and receiving a radio signal; and a processor for detecting the control channel, wherein the processor is configured to; receive a first control signal including carrier information indicating candidate carriers allocated to the terminal among two or more carriers used for the carrier aggregation system; perform blind decoding on only the candidate carriers among the two or more carriers based on the carrier information to detect the control channel, without blind decoding all of the two or more carriers; and receive a second control signal on the detected control channel, wherein a primary carrier of the candidate carriers is blind decoded using a same CCE (Control Channel Element) aggregation level as a legacy terminal which does not support the carrier aggregation system, and one or more secondary carriers of the candidate carriers are blind decoded using aggregation levels adjacent to the aggregation level of the primary carrier, and wherein the first control signal is allocated between a 17th CCE and a (17+N)th CCE, and CCEs between a first CCE and 16th CCE are allocated for both the terminal and the legacy terminal. - View Dependent Claims (9, 10, 11, 12, 13, 14, 16, 18)
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Specification