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 | ||||
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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WO2010103841A1 | 4G | 21/09/2018 | ISLD-201812-010 | SUN PATENT TRUST | Yes | Basis Patent | ||||
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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 base station communicating with a user equipment (UE), for which an uplink component carrier and a plurality of downlink component carriers are configured, the base station comprising:
an adjusting section configured to adjust a payload size of control information, which is transmitted in a downlink control channel, based on a basic payload size; and
a multiplexing section configured to map the control information onto a search space in at least one of the plurality of downlink component carriers,
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 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 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 base station 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 UE.
3. The base station according to claim 1, wherein: the search space is a common search space or a UE specific search space;
the basic payload size of the control information mapped onto the common search space or the UE 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, 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 the UE 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 base station 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, the bandwidth of the uplink component carrier being broadcasted in the primary downlink component carrier.
5. The base station according to claim 1, wherein the control information includes at least one of downlink assignment information and 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 obtained from the bandwidth of the primary downlink component carrier, and on a number of information bits in 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 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 obtained from the bandwidth of the downlink component carrier other than the primary downlink component carrier.
6. The base station according to claim 5, wherein the multiplexing section maps the downlink assignment information onto the search space in at least one of the plurality of downlink component carriers, and maps the uplink assignment information onto the search space in the primary downlink component carrier.
7. The base station 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 base station according to claim 5, wherein the adjusting section adjusts 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 to be equal to each other.
9. The base station according to claim 5, wherein the adjusting section appends zeros 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 base station 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 method for forming a control channel at a base station communicating with a user equipment (UE), for which an uplink component carrier and a plurality of downlink component carriers are configured, the method comprising:
adjusting a payload size of control information, which is transmitted in a downlink control channel, based on a basic payload size; and
mapping the control information onto a search space in at least one of the plurality of downlink component carriers,
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 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 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 method for forming a control channel 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 the UE.
13. The method for forming a control channel according to claim 11, wherein: the search space is a common search space or a UE specific search space;
the basic payload size of the control information mapped onto the common search space or the UE 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, 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 the UE 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 method for forming a control channel 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, the bandwidth of the uplink component carrier being broadcasted in the primary downlink component carrier.
15. The method for forming a control channel according to claim 11, wherein the control information includes at least one of downlink assignment information and 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 obtained from the bandwidth of the primary downlink component carrier, and on a number of information bits in 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 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 obtained from the bandwidth of the downlink component carrier other than the primary downlink component carrier.
16. The method for forming a control channel according to claim 15, wherein the mapping of the control information includes mapping the downlink assignment information onto the search space in at least one of the plurality of downlink component carriers, and mapping the uplink assignment information onto the search space in the primary downlink component carrier.
17. The method for forming a control channel 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 method for forming a control channel according to claim 15, wherein the adjusting of the payload size of the control information includes adjusting 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 to be equal to each other.
19. The method for forming a control channel according to claim 15, wherein the adjusting of the payload size of the control information includes appending zeros 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 method for forming a control channel 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)
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Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
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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.