Communication apparatus and communication method for configuring resource region candidates and mapping downlink control information to same
First Claim
1. A communication apparatus comprising:
- control circuitry which, in operation, configures a plurality of resource region candidates based on a division number which is a number of Control Channel Elements (CCEs) per resource block pair, each resource region candidate including at least one CCE, wherein the division number is larger for a subframe having a normal cyclic prefix length than for a subframe having an extended cyclic prefix length; and
a transmitter which, in operation, maps downlink control information to one of the plurality of resource region candidates and, in operation, transmits the mapped downlink control information.
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Abstract
In a base station (100), a division number calculating unit (103) calculates the division number of a PRB pair on the basis of a first number of REs capable of mapping an allocation control signal, a second number of REs capable of mapping signals other than the allocation control signal, and a reference value, which is the number of REs satisfying the reception quality request in a terminal (200) for the allocation control signal, in each PRB pair. Then, a control signal mapping control unit (104) determines a search space by determining a control channel element group constituting a plurality of mapping unit resource region candidates within a CCE group obtained by separating each PRB pair contained in a first group into the same number as the division number.
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Citations
12 Claims
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1. A communication apparatus comprising:
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control circuitry which, in operation, configures a plurality of resource region candidates based on a division number which is a number of Control Channel Elements (CCEs) per resource block pair, each resource region candidate including at least one CCE, wherein the division number is larger for a subframe having a normal cyclic prefix length than for a subframe having an extended cyclic prefix length; and a transmitter which, in operation, maps downlink control information to one of the plurality of resource region candidates and, in operation, transmits the mapped downlink control information. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A communication method comprising:
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configuring a plurality of resource region candidates based on a division number which is a number of Control Channel Elements (CCEs) per resource block pair, each resource region candidate including at least one CCE, wherein the division number is larger for a subframe having a normal cyclic prefix length than for a subframe having an extended cyclic prefix length; mapping downlink control information to one of the plurality of resource region candidates; and transmitting the mapped downlink control information. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification