Sidelink Terminal Partial Sensing Resource Selection

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Solution Overview

Problem

In wireless communication systems, particularly in NR sidelink communication, power saving is a concern due to limited resource monitoring capabilities during terminal-to-terminal direct communication, especially when not all sensing targets can be monitored.

Innovation Solution

A terminal is equipped with a receiving unit for partial sensing in a resource pool with periodic reservation, a control unit to identify candidate resources based on sensing results, and a transmission unit for selecting and using available resources, with different resource selection operations performed when not all resources can be monitored.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If the terminal performs partial sensing to monitor limited resources in a sensing window, then power consumption is reduced, but the number of slots that can be monitored is limited

Engineering Contradiction:

Improvepower consumptionVSAvoidresource selection reliability

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The terminal performs partial sensing by monitoring only a subset of slots in the sensing window rather than all slots. This partial action reduces power consumption while still enabling resource selection by evaluating resources based on the monitored subset, accepting that not all resources are fully assessed

Inventive Principle:

Principle #16Partial or excessive action

Solution Approach 2:

The terminal changes the parameter of sensing coverage by adjusting which specific slots are monitored within the sensing window. By selectively monitoring certain slots based on resource reservation patterns and communication requirements, the system optimizes the balance between power consumption and resource selection reliability

Inventive Principle:

Principle #35Parameter changes

2Measurement precision

If the terminal monitors all sensing target resources, then resource selection accuracy is improved, but power consumption increases

Engineering Contradiction:

Improvesensing accuracyVSAvoidpower consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

Instead of monitoring all sensing target resources, the terminal performs partial sensing by selecting and monitoring only critical or high-priority slots. This partial monitoring approach maintains sufficient sensing accuracy for resource selection while significantly reducing power consumption compared to full monitoring

Inventive Principle:

Principle #16Partial or excessive action

Solution Approach 2:

The terminal applies different monitoring quality to different slots based on their importance. High-priority slots that contain critical resource reservation information are monitored with full attention, while less critical slots are either monitored with reduced detail or skipped entirely, optimizing the local quality of sensing effort

Inventive Principle:

Principle #3Local quality

3Productivity

If the terminal performs autonomous resource selection with periodic reservation, then communication efficiency is improved, but resource collision risk increases when sensing is limited

Engineering Contradiction:

Improvecommunication efficiencyVSAvoidresource collision avoidance

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The terminal performs preliminary sensing and resource evaluation in advance before actual transmission. By monitoring selected slots in the sensing window and identifying available resources beforehand, the terminal makes informed resource selections that reduce the risk of collisions while maintaining autonomous operation and communication efficiency

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The terminal uses feedback from the partial sensing results to adjust its resource selection strategy. By evaluating the monitored slots and identifying patterns in resource usage, the terminal can make smarter decisions about which resources to select, thereby reducing collision risk even with limited sensing coverage

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS20240205752A1Terminal and communication method

Publication Date: 2024.06.20 NTT DOCOMO INC

AI summary

Provided is a terminal that includes: a receiving unit configured to receive a signal from another terminal in a resource pool in which partial sensing is configured and periodic reservation is enabled; a control unit configured to determine candidate resources for resource selection in the resource pool from a resource selection window, determine resources that correspond to the candidate resources and are sensing targets, and select resources that are available for use by identifying the candidate resources based on a sensing result of the resources that are sensing targets; and a transmission unit configured to perform transmission to the other terminal by using the selected resources. In a case where not all of the resources that are sensing targets can be monitored, the control unit performs a resource selection-related operation that is different from a resource selection-related operation that is performed in a case where all of the resources that are sensing targets can be monitored.