Partial-Sensing HARQ Resource Windows for D2D Communication

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Solution Overview

Problem

Existing technologies do not support Hybrid Automatic Repeat Request (HARQ) technology for user equipment that employs partial sensing in Device-to-Device (D2D) communication, leading to inefficiencies in resource utilization and power consumption.

Innovation Solution

An electronic device and method that discontinuously senses resources in a time domain to support both partial sensing and HARQ technologies, using resource selection windows determined by a network side device, allowing for efficient resource allocation and power savings.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If user equipment discontinuously senses resources in time domain (partial sensing), then power consumption is reduced, but the ability to support HARQ technology deteriorates

Engineering Contradiction:

Improvepower consumptionVSAvoidsupport for HARQ technology

Core Design Contradiction:

Use of energy by moving objectVSAdaptability or versatility

Solution Approach 1:

The resource pool is segmented into multiple resource selection windows (first resource selection window, second resource selection window, etc.), each with specific time durations and sensing requirements. This segmentation allows the system to apply different sensing strategies to different resource windows, enabling partial sensing to work with HARQ by dividing the resource selection process into manageable segments that can be sensed discontinuously while still supporting retransmission resources.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system dynamically adjusts resource selection based on sensing results obtained at different time points. The resource selection window duration is dynamically determined based on the relationship between the window duration and the sensing occasion period, allowing the system to adapt its resource selection strategy to match the discontinuous sensing pattern while maintaining HARQ functionality.

Inventive Principle:

Principle #15Dynamics

2Productivity

If user equipment continuously senses all resources, then resource utilization efficiency is improved, but power consumption increases

Engineering Contradiction:

Improveresource utilization efficiencyVSAvoidpower consumption

Core Design Contradiction:

ProductivityVSUse of energy by moving object

Solution Approach 1:

Instead of continuously sensing all resources, the system performs partial sensing at specific sensing occasions within resource selection windows. The sensing is performed discontinuously at predetermined intervals, sensing only a portion of the resources at each occasion while inferring the status of other resources, thereby reducing power consumption while maintaining adequate resource utilization efficiency.

Inventive Principle:

Principle #16Partial or excessive action

Solution Approach 2:

The system performs sensing in advance at configured sensing occasions before the actual resource selection time. By obtaining sensing results preliminarily and using them to determine resources for both initial transmission and retransmission, the system ensures efficient resource utilization is achieved through advance planning rather than continuous monitoring.

Inventive Principle:

Principle #10Preliminary action

3Speed

If resource selection window duration is shortened to reduce latency, then communication speed is improved, but the ability to accommodate HARQ retransmission deteriorates

Engineering Contradiction:

Improvecommunication speedVSAvoidaccommodation of HARQ retransmission

Core Design Contradiction:

SpeedVSAdaptability or versatility

Solution Approach 1:

The system resolves the time duration conflict by introducing multiple resource selection windows in the time dimension. Instead of requiring a single long window to accommodate both initial transmission and retransmission, the system uses multiple shorter windows, where the first window is for initial transmission and subsequent windows are for retransmission, thereby maintaining short individual window durations while still supporting HARQ functionality.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS12418369B2Electronic device, wireless communication method, and computer-readable storage medium related to resource selection window size thresholds

Publication Date: 2025.09.16 SONY GROUP CORP

AI summary

The present disclosure relates to an electronic device, a wireless communication method and a computer-readable storage medium. The electronic device of the present disclosure comprises a processing circuit, which is configured to: discontinuously sense, in a time domain, whether a resource in a resource pool is idle; and according to a sensing result, determine a resource for a transmission process of a hybrid automatic repeat request (HARQ), the transmission process comprising an initial transmission process and a retransmission process. By using the electronic device, wireless communication method and computer-readable storage medium of the present disclosure, a user equipment can support both partial sensing and HARQ techniques.