Abstract
Disclosed is a base station in which the frequency usage efficiency can be improved when the communication bandwidths are asymmetric in the uplink line and the downlink line. A base station can communicate by using a plurality of downlink unit bands and a smaller number of uplink unit bands. A control unit allocates uplink resource allocation information and downlink resource allocation information to a PDCCH which is arranged in each of the plurality of downlink unit bands and allocates a response signal to the uplink line data to a PHICH which is arranged in the same number of downlink unit bands from the plurality of downlink unit bands as there are uplink unit bands. A transmit RF unit transmits the resource allocation information or the response signal.
Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | |||||
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4G | 06/08/2013 | ISLD-201309-038 | PANASONIC CORP |
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4G | 21/09/2018 | ISLD-201812-010 | 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
Family Information
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Publication No | Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | Status | National Phase Entries | |||||
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Technologies
Resource configuration
Product
Use Cases
Services
Claim
1. A communication apparatus comprising:
a receiver, which, in operation, (a) receives first downlink resource allocation information for a first downlink component carrier, (b) receives second downlink resource allocation information for a second downlink component carrier, which is different from the first downlink component carrier, (c) receives first downlink data on the first downlink component carrier in accordance with the first downlink resource allocation information, (d) receives second downlink data on the second downlink component carrier in accordance with the second downlink resource allocation information, and (e) receives uplink resource allocation information for uplink component carriers on only one out of the first downlink component carrier and the second downlink component carrier; and
a transmitter, which, in operation, transmits uplink data on the uplink component carriers in accordance with the uplink resource allocation information,
wherein the receiver, in operation, receives an Acknowledgement/Negative-acknowledgement (ACK/NACK) signal for the uplink data only said one downlink component carrier on which the uplink resource allocation information is received.
2. The communication apparatus according to claim 1, wherein the ACK/NACK signal for the uplink data is received in a first channel of said one downlink component carrier, the first channel being different from a second channel, in which the first and second downlink resource allocation information are received.
3. The communication apparatus according to claim 2, wherein the first channel is a physical hybrid-ARQ indicator channel (PHICH), and the second channel is a physical downlink control channel (PDCCH).
4. The communication apparatus according to claim 1, wherein a number of the uplink component carriers is equal to a number of two or more downlink component carriers.
5. The communication apparatus according to claim 1, wherein the first downlink component carrier is a downlink semi-reference component carrier used to broadcast information regarding the uplink component carriers.
6. The communication apparatus according to claim 1, wherein a bandwidth of the first downlink component carrier and a bandwidth of the second downlink component carrier are set independently from each other.
7. The communication apparatus according to claim 1, wherein the second downlink component carrier is set only for an LTE-advanced user equipment.
8. A communication method comprising:
receiving first downlink resource allocation information for a first downlink component carrier;
receiving second downlink resource allocation information for a second downlink component carrier, which is different from the first downlink component carrier;
receiving first downlink data on the first downlink component carrier in accordance with the first downlink resource allocation information;
receiving second downlink data on the second downlink component carrier in accordance with the second downlink resource allocation information;
receiving uplink resource allocation information for uplink component carriers on only one downlink component carrier out of the first downlink component carrier and the second downlink component carrier;
transmitting uplink data on the uplink component carriers in accordance with the uplink resource allocation information; and
receiving an Acknowledgement/Negative-acknowledgement (ACK/NACK) signal for the uplink data only on said one downlink component carrier on which the uplink resource allocation information is received.
9. The communication method according to claim 8, wherein the ACK/NACK signal for the uplink data is received in a first channel of said one downlink component carrier, the first channel being different from a second channel, in which the first and second downlink resource allocation information are received.
10. The communication method according to claim 9, wherein the first channel is a physical hybrid-ARQ indicator channel (PHICH), and the second channel is a physical downlink control channel (PDCCH).
11. The communication method according to claim 8, wherein a number of the uplink component carriers is equal to a number of two or more downlink component carriers.
12. The communication method according to claim 8, wherein the first downlink component carrier is a downlink semi-reference component carrier used to broadcast information regarding the uplink component carriers.
13. The communication method according to claim 8, wherein a bandwidth of the first downlink component carrier and a bandwidth of the second downlink component carrier are set independently from each other.
14. The communication method according to claim 8, wherein the second downlink component carrier is set only for an LTE-advanced user equipment.
15. The communication method of claim 8, comprising:
receiving third downlink resource allocation information for a third downlink component carrier, wherein,
the receiving uplink resource allocation information comprises receiving uplink resource allocation information for first and second uplink component carriers on the one downlink component carrier out of the first downlink component carrier and the second downlink component carrier; and
the transmitting the uplink data comprises transmitting uplink data on the first and second uplink component carriers in accordance with the uplink resource allocation information.
16. The communication apparatus of claim 1 wherein,
the receiver, in operation, receives third downlink resource allocation information for a third downlink component carrier and receives uplink resource allocation information for first and second uplink component carriers on the one downlink component carrier out of the first downlink component carrier and the second downlink component carrier; and
the transmitter, in operation, transmits the uplink data on the first and second uplink component carriers in accordance with the uplink resource allocation information.
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