RECEIVER DEVICE, TRANSMITTER DEVICE, RECEPTION METHOD, AND TRANSMISSION METHOD
First Claim
1. A communication apparatus comprising:
- a precoder which, in operation, applies a first precoding corresponding to single-antenna transmission to a downlink control signal when a localized allocation is used and, in operation, applies a second precoding corresponding to multi-antenna transmission to the downlink control signal when a distributed allocation is used, for each of a plurality of Enhanced Physical Downlink Control Channel (EPDCCH) candidates configured in a data region, wherein a plurality of first aggregation levels for the distributed allocation at least partially overlaps with a plurality of second aggregation levels for the localized allocation and includes at least one more aggregation level that is greater than any one of the second aggregation levels, and wherein each of the EPDCCH candidates at an aggregation level comprises a number of resources that corresponds to the aggregation level; and
a transmitter which, in operation, transmits the precoded downlink control signal using a single antenna port when the localized allocation is used and, in operation, transmits the precoded downlink control signal using two antenna ports when the distributed allocation is used.
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Abstract
Provided is a receiver device that can switch between transmission methods, while minimizing increase in the number of blind decryption iterations and the amount of signaling needed for acknowledgement. In this device, a receiver part (201) receives a signal mapped to any of a plurality of mapping candidates; and according to application levels established for each of the plurality of mapping candidates, a control signal processor (205) performs blind decryption of the plurality of mapping candidates, employing either a first transmission method using a single antenna port to carry out precoding based on feedback information from the receiver device, or a second transmission method involving transmission diversity employing multiple antenna ports.
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Citations
12 Claims
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1. A communication apparatus comprising:
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a precoder which, in operation, applies a first precoding corresponding to single-antenna transmission to a downlink control signal when a localized allocation is used and, in operation, applies a second precoding corresponding to multi-antenna transmission to the downlink control signal when a distributed allocation is used, for each of a plurality of Enhanced Physical Downlink Control Channel (EPDCCH) candidates configured in a data region, wherein a plurality of first aggregation levels for the distributed allocation at least partially overlaps with a plurality of second aggregation levels for the localized allocation and includes at least one more aggregation level that is greater than any one of the second aggregation levels, and wherein each of the EPDCCH candidates at an aggregation level comprises a number of resources that corresponds to the aggregation level; and a transmitter which, in operation, transmits the precoded downlink control signal using a single antenna port when the localized allocation is used and, in operation, transmits the precoded downlink control signal using two antenna ports when the distributed allocation is used. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A communication method comprising:
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applying a first precoding corresponding to single-antenna transmission to a downlink control signal when a localized allocation is used and applying a second precoding corresponding to multi-antenna transmission to the downlink control signal when a distributed allocation is used, for each of a plurality of Enhanced Physical Downlink Control Channel (EPDCCH) candidates configured in a data region, wherein a plurality of first aggregation levels for the distributed allocation at least partially overlaps with a plurality of second aggregation levels for the localized allocation and includes at least one more aggregation level that is greater than any one of the second aggregation levels, and wherein each of the EPDCCH candidates at an aggregation level comprises a number of resources that corresponds to the aggregation level; and transmitting the precoded downlink control signal using a single antenna port when the localized allocation is used and transmitting the precoded downlink control signal using two antenna ports when the distributed allocation is used. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification