Receiver device, transmitter device, reception method, and transmission method
First Claim
1. A communication apparatus comprising:
- a receiver, which, in operation, receives, from a base station apparatus comprising three or more antenna ports, a precoded downlink control signal mapped to one of a plurality of mapping candidates,wherein the precoded downlink control signal is prepared by the base station apparatus using a first precoding for single-antenna port transmission with a single antenna port among the three or more antenna ports in localized allocation mode,wherein the precoded downlink control signal is prepared by the base station apparatus using a second precoding for multi-antenna ports transmission with two antenna ports among the three or more antenna ports in distributed allocation mode, andwherein the plurality of mapping candidates has a plurality of aggregation levels, and one or more of the aggregation levels that is higher than a boundary among the plurality of aggregation levels is associated with only the multi-antenna ports transmission, the boundary being determined based on signaling indicated from the base station apparatus; and
a decoder, which, in operation, performs blind decoding on the plurality of mapping candidates using at least one of a first method corresponding to the single-antenna port transmission and a second method corresponding to the multi-antenna ports transmission.
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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.
33 Citations
10 Claims
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1. A communication apparatus comprising:
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a receiver, which, in operation, receives, from a base station apparatus comprising three or more antenna ports, a precoded downlink control signal mapped to one of a plurality of mapping candidates, wherein the precoded downlink control signal is prepared by the base station apparatus using a first precoding for single-antenna port transmission with a single antenna port among the three or more antenna ports in localized allocation mode, wherein the precoded downlink control signal is prepared by the base station apparatus using a second precoding for multi-antenna ports transmission with two antenna ports among the three or more antenna ports in distributed allocation mode, and wherein the plurality of mapping candidates has a plurality of aggregation levels, and one or more of the aggregation levels that is higher than a boundary among the plurality of aggregation levels is associated with only the multi-antenna ports transmission, the boundary being determined based on signaling indicated from the base station apparatus; and a decoder, which, in operation, performs blind decoding on the plurality of mapping candidates using at least one of a first method corresponding to the single-antenna port transmission and a second method corresponding to the multi-antenna ports transmission. - View Dependent Claims (2, 3, 4, 5)
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6. A communication method comprising:
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receiving, from a base station apparatus comprising three or more antenna ports, a precoded downlink control signal mapped to one of a plurality of mapping candidates, wherein the precoded downlink control signal is prepared by the base station apparatus using a first precoding for single-antenna port transmission with a single antenna port among the three or more antenna ports in localized allocation mode, and wherein the precoded downlink control signal is prepared by the base station apparatus using a second precoding for multi-antenna ports transmission with two antenna ports among the three or more antenna ports in distributed allocation mode, wherein the plurality of mapping candidates has a plurality of aggregation levels, and one or more of that aggregation levels that is higher than a boundary among the plurality of aggregation levels is associated with only the multi-antenna ports transmission, the boundary being determined based on signaling indicated from the base station apparatus; and performing blind decoding on the plurality of mapping candidates using at least one of a first method corresponding to the single-antenna port transmission and a second method corresponding to the multi-antenna ports transmission. - View Dependent Claims (7, 8, 9, 10)
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Specification