Abstract
Disclosed is a base station apparatus which allows an idle mode UE, in a small cell using S-NCT, to recognize the small cell and to receive a DCI. The base station apparatus is configured to use a carrier configuration which has no region for mapping a PDCCH and in which an EPDCCH is mapped in a data region. The base station apparatus includes: master information generating section 101 configured to generate allocation information indicating a resource which forms a search space in the EPDCCH and being scrambled with a cell ID of the base station apparatus; and transmitting section 107 configured to transmit the allocation information. a detection signal indicating the cell ID, and a control signal assigned in the search space.
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| 4G | 23/09/2019 | ISLD-201912-056 | SUN PATENT TRUST | Yes | Family Member | ||||
| 4G | 14/12/2020 | ISLD-202012-017 | SUN PATENT TRUST |
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Specification Information
Specification Information
Technologies
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| EP3031264A1 | 4G | 23/09/2019 | ISLD-201912-056 | SUN PATENT TRUST | Yes | Family Member | ||||
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Technologies
Resource configuration
Product
Use Cases
Wireless communication
Services
Claim
1. A base station apparatus using a carrier configuration which includes no region for mapping a physical downlink control channel (PDCCH) and in which an enhanced physical downlink control channel (EPDCCH) is mapped in a data region, the base station apparatus comprising:
a generating section that generates allocation information indicating one or more resources which form a search space in the EPDCCH and being scrambled with a cell ID of the base station apparatus; and a transmitting section that transmits the allocation information, a detection signal indicating the cell ID, and a control signal assigned in the search space.
2. The base station apparatus according to claim 1, wherein the search space is not mapped in a subframe in which the detection signal is mapped among a plurality of subframes each pre-configured as a subframe in which the search space is to be mapped.
3. The base station apparatus according to claim 1, wherein, in a subframe in which the detection signal and the search space are both to be mapped, the search space is mapped to a resource other than a resource to which the detection signal is mapped among the resources indicated by the allocation information.
4. The base station apparatus according to claim 1, wherein, in a subframe in which the detection signal is mapped among a plurality of subframes each pre-configured as a subframe in which the search space is to be mapped, the search space is mapped to a resource other than a resource to which the detection signal is mapped, by skipping a resource that overlaps with the resource to which the detection signal is mapped among the resources indicated by the allocation information.
5. The base station apparatus according to claim 1, wherein:
a plurality of patterns each being a candidate for one or more resources which form the search space are pre-configured; each of the plurality of patterns is formed of a resource other than a resource to which the detection signal is mapped; and the allocation information is information that identifies any one of the plurality of patterns.
6. The base station apparatus according to claim 1, wherein:
the allocation information is information that indicates a start position of and the number of the resources which are consecutive and to which the search space is mapped; and the number of resources is larger for a larger downlink bandwidth.
7. The base station apparatus according to claim 6, wherein:
each downlink bandwidth is associated with a plurality of candidates for the number of resources; and the allocation information further includes information that indicates which one of the plurality of candidates is to be used.
8. The base station apparatus according to claim 1, wherein:
a start position of the resources which are consecutive and to which the search space is mapped is determined based on the cell ID; and the allocation information is information that indicates the number of resources.
9. The base station apparatus according to claim 1, wherein the allocation information further includes information that indicates a period of mapping the search space.
10. A terminal apparatus comprising:
a detection section that detects a detection signal from a received signal transmitted from a base station apparatus using a carrier configuration which includes no region for mapping a physical downlink control channel (PDCCH) and in which an enhanced physical downlink control channel (EPDCCH) is mapped in a data region, the detection signal indicating a cell ID of the base station apparatus; a first receiving section that extracts allocation information from the received signal, using the cell ID, the allocation information indicating one or more resources which form a search space in the EPDCCH; and a second receiving section that extracts a control signal from the received signal by performing blind-decoding with respect to the search space.
11. A transmitting method in a base station apparatus using a carrier configuration which includes no region for mapping a physical downlink control channel (PDCCH) and in which an enhanced physical downlink control channel (EPDCCH) is mapped in a data region, the transmitting method comprising:
generating allocation information indicating one or more resources which form a search space in the EPDCCH and being scrambled with a cell ID of the base station apparatus; and transmitting the allocation information, a detection signal indicating the cell ID, and a control signal assigned in the search space.
12. A receiving method comprising:
detecting a detection signal from a received signal transmitted from a base station apparatus using a carrier configuration which includes no region for mapping a physical downlink control channel (PDCCH) and in which an enhanced physical downlink control channel (EPDCCH) is mapped in a data region, the detection signal indicating a cell ID of the base station apparatus; extracting allocation information from the received signal, using the cell ID, the allocation information indicating one or more resources which form a search space in the EPDCCH; and extracting a control signal from the received signal by performing blind-decoding with respect to the search space.
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