IP Library › Granted Patent US 12,701,554
Granted Patent B2
US 12,701,554 · App. 17/959,433 · Granted Aug 4, 2026

Communication device and communication method that support D2D communication

Inventors: Huiting Cheng (Yokohama, JP); Jianming Wu (Kawasaki, JP); Hongyang Chen (Kawasaki, JP); Michiharu Nakamura (Yokosuka, JP)
Assignee: 1FINITY Inc.
H04W72/0446H04W92/18
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Quick Facts
Patent No.
US 12,701,554
App. No.
17/959,433
Granted
Aug 4, 2026
Kind
B2
Abstract

A communication device that supports D2D (Device-to-Device) communication includes a processor configured to determine a sensing section for performing sensing based on a position of a first slot in a candidate selection slot set and information regarding a transmission of an aperiodic traffic, the sensing section being formed by a plurality of consecutive slots in a sensing window, the candidate selection slot set including a slot that is configured to transmit a D2D signal; and a sensing unit configured to perform sensing in the sensing section determined by the processor. The processor determines a resource for transmitting the D2D signal in the candidate selection slot set based on a result of the sensing by the sensing unit.

Claims (43)

1 . A communication device that supports D2D (Device-to-Device) communication, the communication device comprising:

processor circuitry configured to determine a sensing section for performing sensing based on: a position of a first slot in a candidate selection slot set which includes a slot that is configured to transmit a D2D signal; and information regarding a transmission of an aperiodic traffic, and

sensing circuitry configured to perform sensing in the sensing section determined by the processor circuitry, wherein

the processor circuitry determines a resource for transmitting the D2D signal in the candidate selection slot set based on a result of the sensing by the sensing circuitry,

wherein

the sensing section is formed by a plurality of consecutive slots in a sensing window, and

a length of the sensing section is shorter than a width based on the information regarding the transmission of the aperiodic traffic.

2 . The communication device according to claim 1 , further comprising

a receiver configured to receive the information regarding a transmission of an aperiodic traffic from a base station.

3 . The communication device according to claim 1 , wherein

the start position of the sensing section is a slot that goes back by a specified time from the first slot, the specified time being indicated by the information regarding a transmission of an aperiodic traffic.

4 . The communication device according to claim 3 , wherein

the specified time indicates a range in which a resource for corresponding retransmission can be reserved for a first transmission of D2D data in a communication system including the communication device.

5 . The communication device according to claim 1 , wherein

the processor circuitry determines an end position of the sensing section based on a transmission instruction of data transmitted by using the resource determined by the processor circuitry.

6 . The communication device according to claim 5 , wherein

the end position of the sensing section is a slot that goes back by a second specified time from the transmission instruction.

7 . The communication device according to claim 6 , wherein

the second specified time indicates a time required for the sensing circuitry to perform sensing.

8 . The communication device according to claim 1 , wherein

the sensing circuitry detects control information indicating a resource reserved by another communication device by decoding a received signal, and

the processor circuitry excludes the resource indicated by the control information from resources belonging to the candidate selection slot set, and determines the resource for transmitting the D2D signal among remaining resources in the candidate selection slot set.

9 . The communication device according to claim 1 , wherein

the processor circuitry configures a second sensing section at a position that goes back from the candidate selection slot set by a time indicating a transmission period of D2D traffic designated in advance in a communication system including the communication device,

the sensing circuitry performs sensing in the sensing section and the second sensing section, and

the processor circuitry determines the resource for transmitting the D2D signal in the candidate selection slot set based on the result of the sensing by the sensing circuitry.

10 . A communication method executed by a communication device that supports D2D (Device-to-Device) communication, the communication method comprising:

determining a sensing section for performing sensing based on: a position of a first slot in a candidate selection slot set which includes a slot that is configured to transmit a D2D signal; and information regarding a transmission of an aperiodic traffic,

performing sensing in the sensing section; and

determining a resource for transmitting the D2D signal in the candidate selection slot set based on a result of the sensing,

wherein

the sensing section is formed by a plurality of consecutive slots in a sensing window, and

a length of the sensing section is shorter than a width based on the information regarding the transmission of the aperiodic traffic.

11 . A communication system including a plurality of communication devices that respectively support D2D (Device-to-Device) communication, wherein

a first communication device among the plurality of communication devices transmits control information indicating a reserved resource to a correspondent communication device among the plurality of communication devices,

a second communication device among the plurality of communication devices determines a sensing section for performing sensing based on: a position of a first slot in a candidate selection slot set which includes a slot that is configured to transmit a D2D signal; and information regarding a transmission of an aperiodic traffic,

the second communication device performs sensing in the sensing section, and

when the control information is detected in the sensing, the second communication device excludes the resource indicated by the control information from resources belonging to the candidate selection slot set, and determines a resource for transmitting the D2D signal among remaining resources in the candidate selection slot set,

wherein

the sensing section is formed by a plurality of consecutive slots in a sensing window, and

a length of the sensing section is shorter than a width based on the information regarding the transmission of the aperiodic traffic.

12 . The communication device according to claim 1 , wherein the sensing circuitry is configured to perform sensing during a second sensing period that is set periodically and

the processer circuitry is configured to determine, based on results of sensing during the first sensing period and the second sensing period, resources for transmitting a D2D signal from the selection candidate slot set.

Assignments (3)
CORRECTIVE ASSIGNMENT TO CORRECT THE THE APPLICATION NUMBER 19345640 TO CHANGE IT TO 19346640 AND TO CORRECT THE APPLICATION 19317078 TO CHANGE IT TO 19319078. PREVIOUSLY RECORDED ON REEL 73477 FRAME 351. ASSIGNOR(S) HEREBY CONFIRMS THE THE ASSIGNMENT. Recorded Jan 20, 2026
From: FUJITSU LIMITED
To: 1FINITY INC.
Reel/Frame 075265/0471 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Nov 3, 2025
From: FUJITSU LIMITED
To: 1FINITY INC.
Reel/Frame 073477/0351 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 4, 2022
From: CHENG, HUITING; WU, JIANMING; CHEN, HONGYANG; NAKAMURA, MICHIHARU
To: FUJITSU LIMITED
Reel/Frame 061300/0450 →
Continuity (2)
Continuation PCTJP2020016008 · Apr 9, 2020
Related Publication 20230024809A1 · Jan 26, 2023
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