User terminal and base station
First Claim
Patent Images
1. A user terminal, comprising:
- a processor and a memory coupled to the processor, the processor configured toreceive multicast/broadcast data transmitted from a base station to a plurality of user terminals using the same downlink radio resources;
select uplink radio resources to be used for transmission of feedback information, from a resource pool allocated from the base station to a group including the plurality of user terminals;
transmit the feedback information to the base station using the selected uplink radio resources; and
perform switching from a first mode in which the feedback information is transmitted using the resource pool, to a second mode in which the feedback information is transmitted using a physical uplink control channel which is individually allocated from the base station to each of the user terminals, in response to a notification given from the base station.
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Abstract
A user terminal includes: a receiver configured to receive multicast/broadcast data transmitted from a base station to a plurality of user terminals using the same downlink radio resources; a controller configured to select uplink radio resources to be used for transmission of feedback information, from a resource pool allocated from the base station to a group including the plurality of user terminals; and a transmitter configured to transmit the feedback information to the base station using the selected uplink radio resources.
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Citations
15 Claims
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1. A user terminal, comprising:
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a processor and a memory coupled to the processor, the processor configured to receive multicast/broadcast data transmitted from a base station to a plurality of user terminals using the same downlink radio resources; select uplink radio resources to be used for transmission of feedback information, from a resource pool allocated from the base station to a group including the plurality of user terminals; transmit the feedback information to the base station using the selected uplink radio resources; and perform switching from a first mode in which the feedback information is transmitted using the resource pool, to a second mode in which the feedback information is transmitted using a physical uplink control channel which is individually allocated from the base station to each of the user terminals, in response to a notification given from the base station. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A base station, comprising:
a processor and a memory coupled to the processor, the processor configured to allocate a resource pool usable for transmission of feedback information to a group including a plurality of user terminals; transmit multicast/broadcast data to the plurality of user terminals using the same downlink radio resources; receive the feedback information transmitted from the plurality of user terminals using uplink radio resources selected from the resource pool; determine whether or not switching from a first mode in which the feedback information is transmitted using the resource pool, to a second mode in which the feedback information is transmitted using a physical uplink control channel which is individually allocated from the base station to each of the user terminals; and notify the plurality of user terminals of a determination result. - View Dependent Claims (13, 14)
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15. A method for a user terminal, comprising:
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receiving multicast/broadcast data transmitted from a base station to a plurality of user terminals using the same downlink radio resources; selecting uplink radio resources to be used for transmission of feedback information, from a resource pool allocated from the base station to a group including the plurality of user terminals; transmitting the feedback information to the base station using the selected uplink radio resources; and performing switching from a first mode in which the feedback information is transmitted using the resource pool, to a second mode in which the feedback information is transmitted using a physical uplink control channel which is individually allocated from the base station to each of the user terminals, in response to a notification given from the base station.
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Specification