Base station apparatus, terminal apparatus, communication method, integrated circuit, and communication system
First Claim
1. A base station apparatus that is configured to and/or programmed to communicate with a terminal apparatus, the base station apparatus comprising:
- a transmitter configured to and/or programmed to transmit an Enhanced Physical Downlink Control CHannel (EPDCCH) in an EPDCCH region, whereinphysical resource block pairs corresponding to the EPDCCH region are indicated by higher layers,the EPDCCH is transmitted using one or a plurality of enhanced control channel elements,the enhanced control channel element consists of a plurality of enhanced resource element groups in one physical resource block pair in a case that the enhanced control channel element is subject to a localized mapping,the enhanced control channel element consists of a plurality of enhanced resource element groups in a plurality of physical resource block pairs in a case that the enhanced control channel element is subject to a distributed mapping,in a case of the localized mapping, an EPDCCH UE-specific search space monitored by the terminal apparatus at an aggregation level is defined by a plurality of EPDCCH candidates, n-th EPDCCH candidate and (n+1)-th EPDCCH candidate in the plurality of EPDCCH candidates correspond to enhanced control channel elements in different physical resource block pairs, anda relationship between a number assigned to each EPDCCH candidate and a number assigned to each enhanced control channel element does not vary regardless of whether the enhanced control channel element is subject to the localized mapping or the distributed mapping.
1 Assignment
0 Petitions
Accused Products
Abstract
A base station apparatus in the present invention includes a terminal-specific control channel generation unit that generates terminal-specific control channels mapped in a terminal-specific control channel region that is configured specifically to the terminal apparatus and that is constituted by a prescribed number of resource block pairs and transmitted. If a number of candidate specific control channels monitored by the terminal apparatus is smaller than or equal to a number of resource block pairs in the terminal-specific control channel region at each aggregation level, which indicates a number of the enhanced control channel elements used in each of the terminal-specific control channels, each of the candidate terminal-specific control channels corresponds to a different resource block pair in the terminal-specific control channel region. The terminal-specific control channels are mapped in one of the candidates.
As a result, in a radio communication system in which a base station and a terminal communicate with each other, the base station can efficiently transmit control information to the terminal, which is advantageous.
-
Citations
12 Claims
-
1. A base station apparatus that is configured to and/or programmed to communicate with a terminal apparatus, the base station apparatus comprising:
-
a transmitter configured to and/or programmed to transmit an Enhanced Physical Downlink Control CHannel (EPDCCH) in an EPDCCH region, wherein physical resource block pairs corresponding to the EPDCCH region are indicated by higher layers, the EPDCCH is transmitted using one or a plurality of enhanced control channel elements, the enhanced control channel element consists of a plurality of enhanced resource element groups in one physical resource block pair in a case that the enhanced control channel element is subject to a localized mapping, the enhanced control channel element consists of a plurality of enhanced resource element groups in a plurality of physical resource block pairs in a case that the enhanced control channel element is subject to a distributed mapping, in a case of the localized mapping, an EPDCCH UE-specific search space monitored by the terminal apparatus at an aggregation level is defined by a plurality of EPDCCH candidates, n-th EPDCCH candidate and (n+1)-th EPDCCH candidate in the plurality of EPDCCH candidates correspond to enhanced control channel elements in different physical resource block pairs, and a relationship between a number assigned to each EPDCCH candidate and a number assigned to each enhanced control channel element does not vary regardless of whether the enhanced control channel element is subject to the localized mapping or the distributed mapping. - View Dependent Claims (2, 3, 4)
-
-
5. A terminal apparatus that is configured to and/or programmed to communicate with a base station apparatus, the terminal apparatus comprising:
-
a receiver configured to and/or programmed to monitor an Enhanced Physical Downlink Control CHannel (EPDCCH) UE-specific search space in an EPDCCH region, wherein physical resource block pairs corresponding to the EPDCCH region are indicated by higher layers, an EPDCCH is transmitted using one or a plurality of enhanced control channel elements in the EPDCCH UE-specific search space, the enhanced control channel element consists of a plurality of enhanced resource element groups in one physical resource block pair in a case that the enhanced control channel element is subject to a localized mapping, the enhanced control channel element consists of a plurality of enhanced resource element groups in a plurality of physical resource block pairs in a case that the enhanced control channel element is subject to a distributed mapping, in a case of the localized mapping, the EPDCCH UE-specific search space monitored by the terminal apparatus at an aggregation level is defined by a plurality of EPDCCH candidates, n-th EPDCCH candidate and (n+1)-th EPDCCH candidate in the plurality of EPDCCH candidates correspond to enhanced control channel elements in different physical resource block pair pairs, and a relationship between a number assigned to each EPDCCH candidate and a number assigned to each enhanced control channel element does not vary regardless of whether the enhanced control channel element is subject to the localized mapping or the distributed mapping. - View Dependent Claims (6, 7, 8)
-
-
9. A communication method used by a base station apparatus that is configured to and/or programmed to communicate with a terminal apparatus, the communication method comprising:
-
transmitting an Enhanced Physical Downlink Control CHannel (EPDCCH) in an EPDCCH region, wherein physical resource block pairs corresponding to the EPDCCH region are indicated by higher layers, the EPDCCH is transmitted using one or a plurality of enhanced control channel elements, the enhanced control channel element consists of a plurality of enhanced resource element groups in one physical resource block pair in a case that the enhanced control channel element is subject to a localized mapping, the enhanced control channel element consists of a plurality of enhanced resource element groups in a plurality of physical resource block pairs in a case that the enhanced control channel element is subject to a distributed mapping, in a case of the localized mapping, an EPDCCH UE-specific search space monitored by the terminal apparatus at an aggregation level is defined by a plurality of EPDCCH candidates, n-th EPDCCH candidate and (n+1)-th EPDCCH candidate in the plurality of EPDCCH candidates correspond to enhanced control channel elements in different physical resource block pair pairs, and a relationship between a number assigned to each EPDCCH candidate and a number assigned to each enhanced control channel element does not vary regardless of whether the enhanced control channel element is subject to the localized mapping or the distributed mapping. - View Dependent Claims (10)
-
-
11. A communication method used by a terminal apparatus that is configured to and/or programmed to communicate with a base station apparatus, the communication method comprising:
-
monitoring an Enhanced Physical Downlink Control CHannel (EPDCCH) UE-specific search space in an EPDCCH region, wherein physical resource block pairs corresponding to the EPDCCH region are indicated by higher layers, an EPDCCH is transmitted using one or a plurality of enhanced control channel elements in the EPDCCH UE-specific search space, the enhanced control channel element consists of a plurality of enhanced resource element groups in one physical resource block pair in a case that the enhanced control channel element is subject to a localized mapping, the enhanced control channel element consists of a plurality of enhanced resource element groups in a plurality of physical resource block pairs in a case that the enhanced control channel element is subject to a distributed mapping, in a case of the localized mapping, the EPDCCH UE-specific search space monitored by the terminal apparatus at an aggregation level is defined by a plurality of EPDCCH candidates, n-th EPDCCH candidate and (n+1)-th EPDCCH candidate in the plurality of EPDCCH candidates correspond to enhanced control channel elements in a-different physical resource block pairs, and a relationship between a number assigned to each EPDCCH candidate and a number assigned to each enhanced control channel element does not vary regardless of whether the enhanced control channel element is subject to the localized mapping or the distributed mapping. - View Dependent Claims (12)
-
Specification