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 | 06/08/2013 | ISLD-201309-038 | PANASONIC CORP | No | Family Member | ||||
4G | 21/09/2018 | ISLD-201812-010 | SUN PATENT TRUST | Yes | Family Member | ||||
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Specification Information
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Technologies
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WO2010103841A1 | 4G | 21/09/2018 | ISLD-201812-010 | SUN PATENT TRUST | Yes | Basis Patent | ||||
WO2010103841A1 | 4G | 14/12/2020 | ISLD-202012-017 | SUN PATENT TRUST |
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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:
control circuitry which, in operation, appends zeros to downlink control information based on a basic payload size, and maps the downlink control information to at least one of a plurality of downlink component carriers that includes a primary downlink component carrier; and
a transmitter which, in operation, transmits the downlink control information,
wherein,
the basic payload size of the downlink control information mapped to the primary downlink component carrier is calculated based on a number of information bits obtained from a bandwidth of the primary downlink component carrier and a number of information bits obtained from a bandwidth of an uplink component carrier, and
the basic payload size of the downlink control information mapped to a downlink component carrier other than the primary downlink component carrier is calculated 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 for the communication apparatus.
3. The communication apparatus according to claim 1, wherein the basic payload size of the downlink control information mapped to 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.
4. The communication apparatus according to claim 1, wherein the bandwidth of the uplink component carrier is broadcasted in the primary downlink component carrier.
5. The communication apparatus according to claim 1, wherein,
the downlink control information includes at least one of downlink assignment information and uplink assignment information,
the basic payload size of the downlink control information mapped to the primary downlink component carrier is calculated based on a number of information bits in the downlink assignment information obtained from the bandwidth of the primary downlink component carrier and a number of information bits in the uplink assignment information obtained from the bandwidth of the 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 downlink control information mapped to a downlink component carrier other than the primary downlink component carrier is calculated based on a number of information bits in the downlink assignment information 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 control circuitry, in operation, maps the downlink assignment information to at least one of the plurality of downlink component carriers, and maps the uplink assignment information to the primary downlink component carrier.
7. The communication apparatus according to claim 6, wherein the uplink assignment information is not mapped to a downlink component carrier other than the primary downlink component carrier.
8. The communication apparatus according to claim 5, wherein the control circuitry, in operation, appends zeros to the downlink assignment information mapped to the primary downlink component carrier.
9. The communication apparatus according to claim 5, wherein the control circuitry, in operation, appends zeros to one of the downlink and uplink assignment information mapped to the primary downlink component carrier and including a smaller number of information bits than 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:
appending zeros to downlink control information based on a basic payload size;
mapping the downlink control information to at least one of a plurality of downlink component carriers that includes a primary downlink component carrier; and
transmitting the downlink control information,
wherein,
the basic payload size of the downlink control information mapped to the primary downlink component carrier is calculated based on a number of information bits obtained from a bandwidth of the primary downlink component carrier and a number of information bits obtained from a bandwidth of a uplink component carrier, and
the basic payload size of the downlink control information mapped to a downlink component carrier other than the primary downlink component carrier is calculated 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 for a communication apparatus.
13. The communication method according to claim 11, wherein the basic payload size of the downlink control information mapped to 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.
14. The communication method according to claim 11, wherein the bandwidth of the uplink component carrier is broadcasted in the primary downlink component carrier.
15. The communication method according to claim 11, wherein,
the downlink control information includes at least one of downlink assignment information and uplink assignment information,
the basic payload size of the downlink control information mapped to the primary downlink component carrier is calculated based on a number of information bits in the downlink assignment information obtained from the bandwidth of the primary downlink component carrier and a number of information bits in the uplink assignment information obtained from the bandwidth of the 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 downlink control information mapped to a downlink component carrier other than the primary downlink component carrier is calculated based on a number of information bits in the downlink assignment information 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 mapping of the downlink control information includes mapping the downlink assignment information to at least one of the plurality of downlink component carriers, and mapping the uplink assignment information to the primary downlink component carrier.
17. The communication method according to claim 16, wherein the uplink assignment information is not mapped to a downlink component carrier other than the primary downlink component carrier.
18. The communication method according to claim 15, wherein the appending of zeros includes appending zeros to the downlink assignment information mapped to the primary downlink component carrier.
19. The communication method according to claim 15, wherein the appending of zeros includes appending zeros to one of the downlink and uplink assignment information mapped to the primary downlink component carrier and including a smaller number of information bits than 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.