IP Library › Granted Patent US 12684591
Granted Patent B2
US 12684591 · App. 18/690,021 · Granted Jul 14, 2026

Terminal, radio communication method, and base station

Inventors: Yuki Matsumura (Tokyo, JP); Satoshi Nagata (Tokyo, JP); Weiqi Sun (Beijing, CN); Jing Wang (Beijing, CN); Lan Chen (Beijing, CN)
Assignee: NTT DOCOMO, INC.
H04W72/232H04W72/1268
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Quick Facts
Patent No.
US 12684591
App. No.
18/690,021
Granted
Jul 14, 2026
Kind
B2
Abstract

A terminal according to one aspect of the present disclosure includes: a receiving section that receives first downlink control information indicating cancellation of UL transmission; and a control section that judges whether uplink shared channel transmission is scheduled, based on a symbol position of a first control channel providing the first downlink control information and a symbol position of a second downlink control channel providing second downlink control information for scheduling the uplink shared channel transmission, wherein the control section judges the symbol position of the first downlink control channel and the symbol position of the second downlink control channel, based on at least one of whether repetition transmission of the first downlink control channel is performed and whether repetition transmission of the second downlink control channel is performed.

Claims (26)

1 . A terminal comprising:

a receiver that performs a reception of a first downlink control channel providing first downlink control information indicating cancellation of a first uplink (UL) transmission; and

a processor that, when the first UL transmission is cancelled based on an indication of the first downlink control information, determines scheduling of a second UL transmission on symbols including symbols for the first UL transmission, which is cancelled, based on a symbol position of the first downlink control channel reception and a symbol position of a second downlink control channel reception providing second downlink control information for scheduling the second UL transmission,

wherein the symbol position of the first downlink control channel reception and the symbol position of the second downlink control channel reception are determined based on whether at least one of the first downlink control channel reception and the second downlink control channel reception includes a plurality of downlink control channel candidates.

2 . The terminal according to claim 1 , wherein when the first downlink control channel reception includes a plurality of downlink control channel candidates, the symbol position of the first downlink control channel reception is a first symbol of a downlink control channel candidate that is earlier in a time domain among the plurality of downlink control channel candidates for the first downlink control channel reception.

3 . The terminal according to claim 1 , wherein when the second downlink control channel reception includes a plurality of downlink control channel candidates, the symbol position of the second downlink control channel reception is a last symbol of a downlink control channel candidate that is later in a time domain among the plurality of downlink control channel candidates for the second downlink control channel reception.

4 . The terminal according to claim 2 , wherein when the second downlink control channel reception includes a plurality of downlink control channel candidates, the symbol position of the second downlink control channel reception is a last symbol of a downlink control channel candidate that is later in a time domain among the plurality of downlink control channel candidates for the second downlink control channel reception.

5 . The terminal according to claim 1 , wherein the processor determines that the second UL transmission is not scheduled, when the first downlink control channel reception includes a plurality of downlink control channel candidates and when a last symbol of the second downlink control channel reception is arranged after a first symbol of a downlink control channel candidate that is earlier in a time domain among the plurality of downlink control channel candidates for the first downlink control channel reception.

6 . The terminal according to claim 2 , wherein the processor determines that the second UL transmission is not scheduled, when the first downlink control channel reception includes a plurality of downlink control channel candidates and when a last symbol of the second downlink control channel reception is arranged after a first symbol of a downlink control channel candidate that is earlier in a time domain among the plurality of downlink control channel candidates for the first downlink control channel reception.

7 . The terminal according to claim 3 , wherein the processor determines that the second UL transmission is not scheduled, when the first downlink control channel reception includes a plurality of downlink control channel candidates and when a last symbol of the second downlink control channel reception is arranged after a first symbol of a downlink control channel candidate that is earlier in a time domain among the plurality of downlink control channel candidates for the first downlink control channel reception.

8 . A radio communication method for a terminal, comprising:

performing a reception of a first downlink control channel providing first downlink control information indicating cancellation of a first uplink (UL) transmission; and

when the first UL transmission is cancelled based on an indication of the first downlink control information, determining scheduling of a second UL transmission on symbols including symbols for the first UL transmission, which is cancelled, based on a symbol position of the first downlink control channel reception and a symbol position of a second downlink control channel reception providing second downlink control information for scheduling the second UL transmission,

wherein the symbol position of the first downlink control channel reception and the symbol position of the second downlink control channel reception are determined based on whether at least one of the first downlink control channel reception and the second downlink control channel reception includes a plurality of downlink control channel candidates.

9 . A base station comprising:

a transmitter that performs a transmission of a first downlink control channel providing first downlink control information indicating cancellation of a first uplink (UL) transmission; and

a processor that, when the cancellation of the first UL transmission is indicated based on the first downlink control information, controls scheduling of a second UL transmission on symbols including symbols for the first UL transmission, which is indicated to be cancelled, based on a symbol position of the first downlink control channel transmission and a symbol position of a second downlink control channel transmission providing second downlink control information for scheduling the second UL transmission,

wherein the symbol position of the first downlink control channel transmission and the symbol position of the second downlink control channel transmission are determined based on whether at least one of the first downlink control channel transmission and the second downlink control channel transmission includes a plurality of downlink control channel candidates.

10 . A system comprising a terminal and a base station, wherein

the terminal comprises:

a receiver that performs a reception of a first downlink control channel providing first downlink control information indicating cancellation of a first uplink (UL) transmission; and

a processor that, when the first UL transmission is cancelled based on an indication of the first downlink control information, determines scheduling of a second UL transmission on symbols including symbols for the first UL transmission, which is cancelled, based on a symbol position of the first downlink control channel reception and a symbol position of a second downlink control channel reception providing second downlink control information for scheduling the second UL transmission,

wherein the symbol position of the first downlink control channel reception and the symbol position of the second downlink control channel reception are determined based on whether at least one of the first downlink control channel reception and the second downlink control channel reception includes a plurality of downlink control channel candidates, and

the base station comprises:

a transmitter that transmits the first downlink control channel; and

a processor that, when the cancellation of the first UL transmission is indicated based on the first downlink control information, controls the scheduling of the second UL transmission on the symbols including the symbols for the first UL transmission, which is indicated to be cancelled, based on the symbol position of the first downlink control channel reception and the symbol position of the second downlink control channel reception providing the second downlink control information for scheduling the second UL transmission.