Sequence-Based Resource Indication for Low-Complexity Sidelink Terminals

Solution Overview

Problem

Terminal devices in sidelink communication scenarios, especially those with limited resources due to cost constraints, lack the capability for source and/or channel encoding/decoding and modulation/demodulation, preventing them from indicating resource occupation or receiving SCI, leading to resource conflicts and reduced sensing performance.

Innovation Solution

A method where a communication device sends a sequence indicating the sensing resource using time, frequency, or code domain features, allowing devices without encoding/decoding and modulation capabilities to indicate and detect resource occupation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If terminal devices use simple radar sensing modules without communication modules to reduce cost, then device complexity and cost are reduced, but the ability to indicate resource occupation and receive SCI is lost, leading to resource conflicts

Engineering Contradiction:

Improvedevice complexityVSAvoidresource indication capability

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent creates a simplified copy of the SCI indication mechanism that works with radar sensing modules. Instead of requiring full communication module capabilities, the system uses radar signals to carry resource indication information through sequence features (time domain, frequency domain, or code domain), enabling low-cost devices to indicate resource occupation without complex encoding/decoding hardware

Inventive Principle:

Principle #26Copying

Solution Approach 2:

The patent changes the parameters used for resource indication from traditional communication protocols to radar-compatible parameters. By using time domain location features, frequency domain location features, or code domain features of radar sequences instead of SCI messages, the system enables resource indication functionality in devices without communication modules

Inventive Principle:

Principle #35Parameter changes

2Device complexity

If terminal devices lack source and/or channel encoding/decoding and modulation/demodulation capabilities, then device complexity is reduced, but the ability to send and receive SCI for resource selection is lost, causing resource conflicts

Engineering Contradiction:

Improvedevice complexityVSAvoidsensing performance

Core Design Contradiction:

Device complexityVSProductivity

Solution Approach 1:

The patent creates a simplified copy of the SCI indication mechanism that works with radar sensing modules. Instead of requiring full communication module capabilities, the system uses radar signals to carry resource indication information through sequence features (time domain, frequency domain, or code domain), enabling low-cost devices to indicate resource occupation without complex encoding/decoding hardware

Inventive Principle:

Principle #26Copying

Solution Approach 2:

The patent substitutes the communication module mechanism (encoding/decoding and modulation/demodulation) with a radar signal processing mechanism. By using sequence features directly from radar signals to indicate resource occupation, the system replaces complex communication processing with simpler radar-based detection, improving productivity for devices without communication modules

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Device complexity

If terminal devices cannot receive SCI from other devices, then device complexity is reduced, but resource selection capability deteriorates, leading to resource conflicts

Engineering Contradiction:

Improvedevice complexityVSAvoidresource conflicts

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The patent creates a simplified copy of the SCI indication mechanism that works with radar sensing modules. Instead of requiring full communication module capabilities, the system uses radar signals to carry resource indication information through sequence features (time domain, frequency domain, or code domain), enabling low-cost devices to indicate resource occupation without complex encoding/decoding hardware

Inventive Principle:

Principle #26Copying

Solution Approach 2:

The patent implements a feedback mechanism where terminal devices transmit sequences that indicate their resource occupation to other devices. This feedback loop enables resource-aware selection without requiring full bidirectional SCI communication, reducing resource conflicts while maintaining low device complexity

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS20250274923A1Resource indication method and apparatus

Publication Date: 2025.08.28 HUAWEI TECH CO LTD

AI summary

In a communication method, a first communication device determines a first sensing resource, which includes a time domain resource and a frequency domain resource that are used to carry a first sensing signal. The first communication device sends a first sequence and the first sensing signal in a first time unit. One of a time domain location feature, a frequency domain location feature, or a code domain feature of the first sequence indicates the first sensing resource. After receiving the first sequence, a third communication device determines a third sensing resource based on the first sensing resource indicated by the first sequence.