Back to results
US 12,757,208 B2Granted
Terminal and radio communication method
AssigneeNtt Docomo, Inc.
InventorsShohei Yoshioka, Yuki Matsumura, Satoshi Nagata
Life of this patent
Estimating the term…
Abstract
A terminal transmits the feedback of the automatic retransmission request. When the bit string of the feedback is associated with the resource of the uplink control channel and only the negative response is fed back, the terminal applies only the index of one cyclic shift to one resource.
Claims6
A terminal that supports a multicast service, comprising:
- a processor that, in a case where a bit string of feedback of an automatic retransmission request for multicast data is associated with resources of an uplink control channel and only a negative response is fed back, applies only an index of one cyclic shift to one of the resources when a first format of the uplink control channel is used, and applies a signal point indicating NACK in two-phase shift modulation to one of the resources when a second format of the uplink control channel is used;
- and
- a transmitter that transmits the feedback, wherein
- the resources are defined as a resource set that is multiplexable up to N bits, where N is a number of bits of the feedback, and a corresponding table contains up to (2N−1) PUCCH resources and is applied to all the number of bits of the feedback.
1 more element
A base station that supports a multicast service, comprising:
- a receiver that receives feedback of an automatic retransmission request for multicast data;
- and
- a processor that, in a case where a bit string of the feedback is associated with resources of an uplink control channel and only a negative response is fed back, determines that only an index of one cyclic shift to one of the resources is applied when a first format of the uplink control channel is used, and a signal point indicating NACK in two-phase shift modulation to one of the resources is applied when a second format of the uplink control channel is used, wherein
- the resources are defined as a resource set that is multiplexable up to N bits, where N is a number of bits of the feedback, and a corresponding table contains up to (2N−1) PUCCH resources and is applied to all the number of bits of the feedback.
1 more element
A communication system including a terminal and a base station, for supporting a multicast service, wherein
- the terminal comprises:
- a processor that, in a case where a bit string of feedback of an automatic retransmission request for multicast data is associated with resources of an uplink control channel and only a negative response is fed back, applies only an index of one cyclic shift to one of the resources when a first format of the uplink control channel is used, and applies a signal point indicating NACK in two-phase shift modulation to one of the resources when a second format of the uplink control channel is used;
- and
- a transmitter that transmits the feedback, wherein
- the resources are defined as a resource set that is multiplexable up to N bits, where N is a number of bits of the feedback, and a corresponding table contains up to (2N−1) PUCCH resources, and is applied to all the number of bits of the feedback, and
- the base station comprises:
- a receiver that receives the feedback from the terminal;
- and
- a processor that determines that, in a case where only a negative response is fed back, only an index of one cyclic shift to one of the resources is applied when a first format of the uplink control channel is used, and a signal point indicating NACK in two-phase shift modulation to one of the resources is applied when a second format of the uplink control channel is used.
6 more elements
A radio communication method of a terminal that supports a multicast service comprising:
- in a case where a bit string of the feedback of an automatic retransmission request for multicast data is associated with resources of an uplink control channel and only a negative response is fed back, applying only an index of one cyclic shift to one of the resources when a first format of the uplink control channel is used, and applying a signal point indicating NACK in two-phase shift modulation to one of the resources when a second format of the uplink control channel is used;
- and
- transmitting the feedback, wherein
- the resources are defined as a resource set that is multiplexable up to N bits, where N is a number of bits of the feedback, and a corresponding table contains up to (2N−1) PUCCH resources and is applied to all the number of bits of the feedback.
1 more element
Dependencies are inferred from the claim text.