Sidelink Sync Signal Priority via DM-RS Initialization

Solution Overview

Problem

In wireless communication systems, particularly in sidelink communications, there is a challenge in distinguishing between different sidelink synchronization priority levels and efficiently determining the synchronization priority of sidelink synchronization signal blocks, which affects synchronization performance and resource allocation.

Innovation Solution

Incorporating a demodulation reference signal (DM-RS) initialization value within the sidelink synchronization signal block that provides priority-related information, allowing receiving user equipment to quickly determine the synchronization priority level and optimize processing resources.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If receiving user equipment decodes all sidelink synchronization signal blocks to determine synchronization priority, then synchronization accuracy is improved, but processing time and energy consumption increase

Engineering Contradiction:

Improvesynchronization accuracyVSAvoidprocessing time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The patent applies preliminary action by embedding priority information directly into the DM-RS sequence initialization values before the receiving equipment needs to process the synchronization signal. This allows the priority level to be conveyed in advance through the sequence generation parameters, enabling receiving UEs to identify priority levels without decoding the complete signal structure.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent extracts the priority information from the complex synchronization signal structure and places it into the DM-RS sequence initialization values. By taking out the priority indication into a separate, easily detectable parameter (the initialization value), the system allows receiving equipment to quickly determine priority without processing the entire signal block.

Inventive Principle:

Principle #2Taking out (Extraction)

2Measurement precision

If receiving user equipment decodes all sidelink synchronization signal blocks to determine synchronization priority, then synchronization accuracy is improved, but energy consumption increases

Engineering Contradiction:

Improvesynchronization accuracyVSAvoidenergy consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The patent applies preliminary action by embedding priority information directly into the DM-RS sequence initialization values before the receiving equipment needs to process the synchronization signal. This allows the priority level to be conveyed in advance through the sequence generation parameters, enabling receiving UEs to identify priority levels without decoding the complete signal structure.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent extracts the priority information from the complex synchronization signal structure and places it into the DM-RS sequence initialization values. By taking out the priority indication into a separate, easily detectable parameter (the initialization value), the system allows receiving equipment to quickly determine priority without processing the entire signal block.

Inventive Principle:

Principle #2Taking out (Extraction)

3Reliability

If multiple sidelink synchronization priority levels are implemented, then synchronization performance is improved, but device complexity increases

Engineering Contradiction:

Improvesynchronization performanceVSAvoidsignal structure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies universality by making the DM-RS sequence initialization values serve multiple functions: they provide both the necessary demodulation reference for signal processing and simultaneously encode the priority information. This multi-functionality allows the system to support multiple priority levels without adding separate signaling mechanisms, thereby avoiding increased device complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent merges the priority indication function with the existing DM-RS sequence generation process. By combining the priority encoding into the sequence initialization values, the system integrates multiple functions (demodulation reference and priority signaling) into a single component, avoiding the need for separate priority indication signals and reducing overall system complexity.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS12177801B2Synchronization priority for sidelink wireless communications

Publication Date: 2024.12.24 NOKIA TECHNOLOGIES OY

AI summary

According to an example embodiment, a method may include transmitting, by a wireless node in a wireless network, a sidelink synchronization signal (S-SSB) block, including a sidelink primary synchronization signal (S-PSS), a sidelink secondary synchronization signal (S-SSS), a physical sidelink broadcast channel (PSBCH), and a demodulation reference signal (DM-RS), wherein the demodulation reference signal is based on at least a sidelink demodulation reference signal initialization value for the sidelink synchronization signal block to provide sidelink priority-related information for the sidelink synchronization signal block.