5G NR Sidelink Partial Sensing for Accurate Resource Reservation

Solution Overview

Problem

The 5G NR standard lacks specified partial sensing procedures for sidelink transmissions, particularly for configurable reservation periods and aperiodic traffic reservations, leading to inefficiencies in resource allocation and increased power consumption.

Innovation Solution

A partial sensing procedure is introduced for sidelink transmissions, enabling terminal devices to determine candidate resources by monitoring specific slots within a configured sensing window, using higher layer parameters to indicate sensing enablement and configure time lengths and reservation periods.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If full sensing procedure is used for sidelink transmissions, then resource allocation accuracy is improved, but power consumption increases and device complexity increases

Engineering Contradiction:

Improveresource allocation accuracyVSAvoidpower consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The patent implements partial sensing by having the terminal device monitor only a subset of slots within the sensing window rather than all slots. Specifically, the device determines a set of slots based on the configured time length of the sensing window and monitors only those slots to determine reservation state, performing less than complete sensing action while still achieving adequate resource allocation accuracy.

Inventive Principle:

Principle #16Partial or excessive action

Solution Approach 2:

The sensing window is segmented into multiple slots, and the terminal device is configured to monitor only specific slots within this window rather than continuously monitoring all slots. This segmentation allows the device to divide the sensing task into discrete, manageable portions, reducing overall power consumption while maintaining resource allocation accuracy.

Inventive Principle:

Principle #1Segmentation

2Measurement precision

If full sensing procedure is used for sidelink transmissions, then resource allocation accuracy is improved, but device complexity increases

Engineering Contradiction:

Improveresource allocation accuracyVSAvoidsensing procedure complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent implements partial sensing by having the terminal device monitor only a subset of slots within the sensing window rather than all slots. Specifically, the device determines a set of slots based on the configured time length of the sensing window and monitors only those slots to determine reservation state, performing less than complete sensing action while still achieving adequate resource allocation accuracy.

Inventive Principle:

Principle #16Partial or excessive action

Solution Approach 2:

The sensing window is segmented into multiple slots, and the terminal device is configured to monitor only specific slots within this window rather than continuously monitoring all slots. This segmentation allows the device to divide the sensing task into discrete, manageable portions, reducing overall device complexity.

Inventive Principle:

Principle #1Segmentation

3Measurement precision

If sensing window time length is increased, then resource reservation accuracy is improved, but power consumption increases

Engineering Contradiction:

Improveresource reservation accuracyVSAvoidpower consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The patent implements partial sensing by having the terminal device monitor only a subset of slots within the sensing window rather than all slots. Specifically, the device determines a set of slots based on the configured time length of the sensing window and monitors only those slots to determine reservation state, performing less than complete sensing action while still achieving adequate resource allocation accuracy.

Inventive Principle:

Principle #16Partial or excessive action

Solution Approach 2:

The patent allows the network device to configure the time length of the sensing window through higher layer parameters, enabling dynamic adjustment of the sensing window duration. This parameter change allows optimization between resource reservation accuracy and power consumption based on specific traffic conditions and requirements.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12550189B2Methods for communication, terminal device, network device, and computer readable media

Publication Date: 2026.02.10 NEC CORP

AI summary

Embodiments of the present disclosure provide a solution for sensing sidelink resources. In a method for communication, in accordance with receiving, at a terminal device from a network device, a first higher layer parameter indicating that partial sensing is enabled for the terminal device, the terminal device determines a candidate resource for performing a sidelink transmission in a target slot. The terminal device determines, for the partial sensing, a sensing window with a configured time length before the target slot. The terminal device determines, in the sensing window, a set of slots based on the configured time length of the sensing window. The terminal device determines a reservation state of the candidate resource by monitoring the set of slots. With the embodiments of the present disclosure, a feasible partial sensing procedure is provided for a terminal device to perform a sidelink transmission in the 5G NR, and thus the performance of sidelink transmissions can be improved.