WIRELESS COMMUNICATION BASE STATION EQUIPMENT, WIRELESS COMMUNICATION TERMINAL DEVICE AND SEARCH SPACE SETTING METHOD
First Claim
1. A radio communication base station apparatus comprising:
- an allocation section that sets different search spaces for a plurality of downlink component bands in a radio communication terminal apparatus that communicates using the plurality of downlink component bands, and allocates resource allocation information of downlink data directed to the radio communication terminal apparatus to control channel elements (CCEs) in the search space; and
a receiving section that extracts a response signal to the downlink data from an uplink control channel associated with the CCEs to which the resource allocation information is allocated.
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Accused Products
Abstract
Disclosed is wireless communication base station equipment in which CCE allocation can be flexibly performed without collision of ACK/NACK signals between a plurality of unit bands, even when wideband transmission is performed exclusively on a downlink circuit. In this equipment, an allocation unit (105) sets up mutually different search spaces for each of a plurality of downlink unit bands, with respect to wireless communication terminal devices that communicate using a plurality of downlink unit bands, and allocates resource allocation information of downlink circuit data destined for the wireless communication terminal devices to CCEs in mutually different search spaces for each of the plurality of downlink unit bands, and an ACK/NACK reception unit (119); extracts a response signal in respect of the downlink circuit data from the uplink control channel associated with the CCE to which the resource allocation information of this downlink circuit data was allocated.
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Citations
10 Claims
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1. A radio communication base station apparatus comprising:
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an allocation section that sets different search spaces for a plurality of downlink component bands in a radio communication terminal apparatus that communicates using the plurality of downlink component bands, and allocates resource allocation information of downlink data directed to the radio communication terminal apparatus to control channel elements (CCEs) in the search space; and a receiving section that extracts a response signal to the downlink data from an uplink control channel associated with the CCEs to which the resource allocation information is allocated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A radio communication terminal apparatus that communicates using a plurality of downlink component bands, the radio communication terminal apparatus comprising:
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a receiving section that blind-decodes control channel elements (CCEs) in different search spaces for the plurality of downlink component bands and obtains resource allocation information of downlink data directed to the radio communication terminal apparatus; and a mapping section that maps a response signal to the downlink data to an uplink control channel associated with the CCEs to which the resource allocation information is allocated.
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10. A search space setting method that sets different search spaces for a plurality of downlink component bands for a radio communication terminal apparatus that communicates using the plurality of downlink component bands.
Specification