Radio communication mobile station device and response signal spread sequence control method
First Claim
1. A terminal apparatus comprising:
- a deciding section, embodied on a processor, configured to decide a resource index of an uplink control channel to which a response signal to downlink data is mapped; and
a control section configured to determine a sequence, which is used for the response signal, from the decided resource index of the uplink control channel,wherein;
a downlink control channel is allocated to one or several consecutive control channel element(s) (CCE(s)) in a search space, which is comprised of CCEs corresponding to a plurality of downlink control channel candidates to be attempted to be decoded;
said deciding section decides the resource index of the uplink control channel based on the CCE(s), to which the downlink control channel is allocated; and
the search space for each aggregation size corresponding to a number of the CCE(s), to which the downlink control channel is allocated, is comprised of CCEs that are defined by starting on a CCE with a CCE number, which depends on both a total number of CCEs in a subframe and the aggregation size, and at least part of the search space for the each aggregation size is comprised of CCEs with consecutive CCE numbers.
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Accused Products
Abstract
Provided is a radio communication mobile station device which can reduce the number of blind decoding processes at a mobile station without increasing the overhead by report information. The device includes: a judgment unit (210) which judges a particular PUCCH to which a response signal corresponding to the downstream line data is to be allocated among a plurality of PUCCH, according to a CCE occupied by PDCCH allocated to a particular search space corresponding to a CCE aggregation size of the PDCCH to which allocation information destined to the local station is allocated among search spaces changing in accordance with the CFI value; and a control unit (211) which controls a cyclic shift amount of a ZAC sequence of the response signal and a block-wise spread code sequence according to a correspondence between CCE occupied by PDCCH allocated to a particular search space and a particular PUCCH resource, the correspondence changing in accordance with the CFI value.
14 Citations
16 Claims
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1. A terminal apparatus comprising:
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a deciding section, embodied on a processor, configured to decide a resource index of an uplink control channel to which a response signal to downlink data is mapped; and a control section configured to determine a sequence, which is used for the response signal, from the decided resource index of the uplink control channel, wherein; a downlink control channel is allocated to one or several consecutive control channel element(s) (CCE(s)) in a search space, which is comprised of CCEs corresponding to a plurality of downlink control channel candidates to be attempted to be decoded; said deciding section decides the resource index of the uplink control channel based on the CCE(s), to which the downlink control channel is allocated; and the search space for each aggregation size corresponding to a number of the CCE(s), to which the downlink control channel is allocated, is comprised of CCEs that are defined by starting on a CCE with a CCE number, which depends on both a total number of CCEs in a subframe and the aggregation size, and at least part of the search space for the each aggregation size is comprised of CCEs with consecutive CCE numbers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method comprising:
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deciding, at a terminal apparatus, a resource index of a uplink control channel to which a response signal to downlink data is mapped; and determining a sequence, which is used for the response signal, from the resource index of the uplink control channel, wherein; a downlink control channel is allocated to one or several consecutive control channel element(s) (CCE(s)) in a search space, which is comprised of CCEs corresponding to a plurality of downlink control channel candidates to be attempted to be decoded; the resource index of the uplink control channel is decided based on the CCE(s), to which the downlink control channel is allocated, is comprised of CCEs that are defined by starting on a CCE with a CCE number, which depends on both a total number of CCEs in a subframe and the aggregation size; and
at least part of the search space for the aggregation size is comprised of CCEs with consecutive CCE numbers.
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Specification