US 2018/0294930 A1Published application

Base station, terminal, search space setting method and decoding method

AssigneeSun Patent Trust

InventorsSeigo Nakao, Akihiko Nishio, Ayako Horiuchi, Daichi Imamura

Life of this patent

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Abstract

The invention provides a base station that does not cause the number of blind decodings to be increased and further can prevent the flexibility of resource allocation from degrading. A search space setting unit sets search spaces each of which is constituted by one or more control channel elements (CCEs) and each of which is to be decoded in the terminals and each of which is defined by a plurality of to-be-decoded candidates. An allocating unit places, in one of the plurality of to-be-decoded candidates included in the search space, a control channel. The number of connections of CCEs constituting the to-be-decoded candidate is associated with the number of to-be-decoded candidates. The search space setting unit causes, in accordance with the control channel to be transmitted, the association of the number of connections of CCEs constituting the to-be-decoded candidate with the number of to-be-decoded candidates to differ.

Claims16

Dependent claims

A communication apparatus comprising:

a receiver, which, in operation, receives a control channel transmitted on at least one of search spaces, each being defined by candidates to be decoded by the communication apparatus;
and
a decoder, which, in operation, decodes the control channel, wherein:
when the communication apparatus is configured to decode the candidates of a first search space in a first region and of a second search space in a second region, the first search space is configured based on a first association between an aggregation level of a control channel element (CCE), on which the control channel is transmitted, and a number of the candidates to be decoded in the first search space, and the second search space is configured based on a second association between an aggregation level of the CCE, on which the control channel is transmitted, and a number of the candidates to be decoded in the second search space, the first association being different from the second association;
and
when the communication apparatus is configured to decode the candidates of a third search space in the first region, the third search space is configured based on an third association between an aggregation level of the CCE, on which the control channel is transmitted, and a number of the candidates to be decoded in the third search space.

3 more elements

A communication method comprising:

receiving, by a communication apparatus, a control channel transmitted on at least one of search spaces, each being defined by candidates to be decoded by the communication apparatus;
and
decoding, by the communication apparatus, the control channel, wherein:
when the communication apparatus is configured to decode the candidates of a first search space in a first region and of a second search space in a second region, the first search space is configured based on a first association between an aggregation level of a control channel element (CCE), on which the control channel is transmitted, and a number of the candidates to be decoded in the first search space, and the second search space is configured based on a second association between an aggregation level of the CCE, on which the control channel is transmitted, and a number of the candidates to be decoded in the second search space, the first association being different from the second association;
and
when the communication apparatus is configured to decode the candidates of a third search space in the first region, the third search space is configured based on an third association between an aggregation level of the CCE, on which the control channel is transmitted, and a number of the candidates to be decoded in the third search space.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/010,243Filed 15 Jun 2018
Priority: JP 2010-16430821 Jul 2010
Published: 11 Oct 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

H04L 5/001
The frequencies being orthogonal, e.g. OFDM or DMT: the frequencies being arranged in component carriers
H04L 5/0005
Two-dimensional division: time-frequency
H04L 5/0023
Three-dimensional division: time-frequency-space
H04L 5/0032
Arrangements for allocating sub-channels of the transmission path: distributed allocation, i.e. involving a plurality of allocating devices, each…

Family

Application13/806,631Continuation · filed 21 Dec 2012
Application14/681,867Continuation · filed 8 Apr 2015
Application15/483,918Continuation · filed 10 Apr 2017
Application16/010,243Continuation
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