Abstract
A base station communicates with a terminal for which an uplink component carrier and downlink component carriers are configured. The base station adjusts a payload size of control information transmitted in a downlink control channel based on a basic payload size and maps the control information onto a search space in at least one of the downlink component carriers. The basic payload size of the control information mapped onto a search space in a primary downlink component carrier is based on a number of information bits obtained from a bandwidth of the primary downlink component carrier and on a number of information bits obtained from a bandwidth of the uplink component carrier. The basic payload size of the control information mapped onto a search space in a non-primary downlink component carrier is based on a number of information bits obtained from a bandwidth of the non-primary downlink component carrier.
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4G | 14/12/2020 | ISLD-202012-017 | SUN PATENT TRUST |
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Specification Information
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Technologies
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Publication No | Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | Status | National Phase Entries | |||||
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Technologies
Product
Use Cases
Services
Claim
1. A communication apparatus comprising:
determination circuitry which, in operation, determine a basic payload size of control information that is transmitted from a base station in a downlink control channel; and
a receiver which, in operation, detects the control information, which is mapped onto a search space in each of a plurality of downlink component carriers, using the determined basic payload size, wherein:
the plurality of downlink component carriers include a primary downlink component carrier;
the basic payload size of the control information mapped onto a search space in the primary downlink component carrier is a payload size, which is given based on a number of information bits obtained from a bandwidth of the primary downlink component carrier, and on a number of information bits obtained from a bandwidth of an uplink component carrier, the bandwidth of the uplink component carrier being broadcasted in the primary downlink component carrier; and
the basic payload size of the control information mapped onto a search space in a downlink component carrier other than the primary downlink component carrier is a payload size, which is given based on a number of information bits obtained from a bandwidth of the downlink component carrier other than the primary downlink component carrier.
2. The communication apparatus according to claim 1, wherein the primary downlink component carrier is a downlink component carrier that broadcasts information related to the uplink component carrier configured to the communication apparatus.
3. The communication apparatus according to claim 1, wherein: the search space is a common search space or a communication apparatus specific search space;
the basic payload size of the control information mapped onto the common search space or the communication apparatus specific search space in the primary downlink component carrier is a payload size, which is given based on the number of information bits obtained from the bandwidth of the primary downlink component carrier, and on the number of information bits obtained from the bandwidth of the uplink component carrier; and
the basic payload size of the control information mapped onto the communication apparatus specific search space in a downlink component carrier other than the primary downlink component carrier is a payload size, which is given based on the number of information bits obtained from the bandwidth of the downlink component carrier other than the primary downlink component carrier.
4. The communication apparatus according to claim 1, wherein the basic payload size of the control information mapped onto the search space in the primary downlink component carrier corresponds to a larger one of the number of information bits obtained from the bandwidth of the primary downlink component carrier and the number of information bits obtained from the bandwidth of the uplink component carrier.
5. The communication apparatus according to claim 1, wherein the control information includes downlink assignment information or uplink assignment information;
the basic payload size of the control information mapped onto the search space in the primary downlink component carrier is a payload size, which is given based on a number of information bits in downlink assignment information wherein said number is obtained from the bandwidth of the primary downlink component carrier, and on a number of information bits in uplink assignment information wherein said number is obtained from the bandwidth of the uplink component carrier; and
the basic payload size of the control information mapped onto the search space in a downlink component carrier other than the primary downlink component carrier is a payload size, which is given based on a number of information bits in downlink assignment information wherein said number is obtained from the bandwidth of the downlink component carrier other than the primary downlink component carrier.
6. The communication apparatus according to claim 5, wherein the downlink assignment information is mapped onto the search space in each of the plurality of downlink component carriers, and the uplink assignment information is mapped onto the search space in the primary downlink component carrier.
7. The communication apparatus according to claim 6, wherein the uplink assignment information is not mapped onto the search space in a downlink component carrier other than the primary downlink component carrier.
8. The communication apparatus according to claim 5, wherein the payload size of the downlink assignment information mapped onto the search space in the primary downlink component carrier and the payload size of the uplink assignment information mapped onto the search space in the primary downlink component carrier are adjusted to be equal to each other.
9. The communication apparatus according to claim 5, wherein zeros are appended to one of the downlink and uplink assignment information mapped onto the search space in the primary downlink component carrier, which includes the number of information bits that is smaller than the number of information bits included in the other of the downlink and uplink assignment information, until the payload size of said one of the downlink and uplink assignment information becomes equal to the payload size of said other of the downlink and uplink assignment information.
10. The communication apparatus according to claim 5, wherein a format of the downlink assignment information is format 1A, and a format of the uplink assignment information is format 0.
11. A communication method comprising:
determining, at processing circuitry of a communication apparatus, a basic payload size of control information that is transmitted from a base station in the downlink control channel; and
detecting, at the communication apparatus, the control information, which is mapped onto a search space in each of a plurality of downlink component carriers, using the determined basic payload size, wherein:
the plurality of downlink component carriers include a primary downlink component carrier;
the basic payload size of the control information mapped onto a search space in the primary downlink component carrier is a payload size, which is given based on a number of information bits obtained from a bandwidth of the primary downlink component carrier, and on a number of information bits obtained from a bandwidth of an uplink component carrier, the bandwidth of the uplink component carrier being broadcasted in the primary downlink component carrier; and
the basic payload size of the control information mapped onto a search space in a downlink component carrier other than the primary downlink component carrier is a payload size, which is given based on a number of information bits obtained from a bandwidth of the downlink component carrier other than the primary downlink component carrier.
12. The communication method according to claim 11, wherein the primary downlink component carrier is a downlink component carrier that broadcasts information related to the uplink component carrier configured to the communication apparatus.
13. The communication method according to claim 11, wherein: the search space is a common search space or a communication apparatus specific search space;
the basic payload size of the control information mapped onto the common search space or the communication apparatus specific search space in the primary downlink component carrier is a payload size, which is given based on the number of information bits obtained from the bandwidth of the primary downlink component carrier, and on the number of information bits obtained from the bandwidth of the uplink component carrier; and
the basic payload size of the control information mapped onto the communication apparatus specific search space in a downlink component carrier other than the primary downlink component carrier is a payload size, which is given based on the number of information bits obtained from the bandwidth of the downlink component carrier other than the primary downlink component carrier.
14. The communication method according to claim 11, wherein the basic payload size of the control information mapped onto the search space in the primary downlink component carrier corresponds to a larger one of the number of information bits obtained from the bandwidth of the primary downlink component carrier and the number of information bits obtained from the bandwidth of the uplink component carrier.
15. The communication method according to claim 11, wherein the control information includes downlink assignment information or uplink assignment information;
the basic payload size of the control information mapped onto the search space in the primary downlink component carrier is a payload size, which is given based on a number of information bits in downlink assignment information wherein said number is obtained from the bandwidth of the primary downlink component carrier, and on a number of information bits in uplink assignment information wherein said number is obtained from the bandwidth of the uplink component carrier; and
the basic payload size of the control information mapped onto the search space in a downlink component carrier other than the primary downlink component carrier is a payload size, which is given based on a number of information bits in downlink assignment information wherein said number is obtained from the bandwidth of the downlink component carrier other than the primary downlink component carrier.
16. The communication method according to claim 15, wherein the downlink assignment information is mapped onto the search space in each of the plurality of downlink component carriers, and the uplink assignment information is mapped onto the search space in the primary downlink component carrier.
17. The communication method according to claim 16, wherein the uplink assignment information is not mapped onto the search space in a downlink component carrier other than the primary downlink component carrier.
18. The communication method according to claim 15, wherein the payload size of the downlink assignment information mapped onto the search space in the primary downlink component carrier and the payload size of the uplink assignment information mapped onto the search space in the primary downlink component carrier are adjusted to be equal to each other.
19. The communication method according to claim 15, wherein zeros are appended to one of the downlink and uplink assignment information mapped onto the search space in the primary downlink component carrier, which includes the number of information bits that is smaller than the number of information bits included in the other of the downlink and uplink assignment information, until the payload size of said one of the downlink and uplink assignment information becomes equal to the payload size of said other of the downlink and uplink assignment information.
20. The communication method according to claim 15, wherein a format of the downlink assignment information is format 1A, and a format of the uplink assignment information is format 0.
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The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)
The information in grey was provided by the patent holder
The information in purple was extracted from the FrandAvenue
Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.
Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.
Family member:related patents or applications that share a common priority or original filing.