NR-LTE Sidelink Sync Signal Prioritization for Collision Avoidance
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Solution Overview
Problem
In wireless communication systems, particularly in 5G NR, there is a need for efficient prioritization of synchronization signals to avoid collisions between NR V2X and LTE V2X transmissions, which share the same time-frequency resources due to spectrum scarcity.
Innovation Solution
A configuration for prioritizing synchronization signals is introduced, where NR UEs determine a priority between synchronization sources associated with NR and LTE. This prioritization allows NR UEs to efficiently manage synchronization references and burst transmissions, even when both LTE and NR SyncRef UEs are present in the network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If NR and LTE V2X transmissions share the same time-frequency resources, then spectrum utilization is improved, but transmission collisions increase
Solution Approach 1:
The patent segments the synchronization signal transmission by introducing different priority levels for NR and LTE synchronization signals. This allows the system to maintain shared time-frequency resources while reducing collisions through prioritization, where higher priority synchronization signals can interrupt lower priority transmissions.
Solution Approach 2:
The patent changes the parameter of signal priority by assigning different priority values to NR and LTE synchronization signals. This parameter change enables the system to manage resource sharing by controlling which synchronization signal is transmitted when both NR and LTE signals are detected, thereby reducing collisions while maintaining spectrum utilization.
2Reliability
If synchronization signal prioritization is implemented, then coexistence between NR and LTE is improved, but system complexity increases
Solution Approach 1:
The patent implements self-service by enabling UEs to autonomously determine and apply prioritization rules for synchronization signals. The UE automatically detects both NR and LTE synchronization signals, determines priority based on pre-configured rules, and transmits accordingly without requiring complex external control or manual intervention.
Solution Approach 2:
The patent applies preliminary action by pre-configuring priority rules for different synchronization signal types before actual transmission occurs. This allows the system to handle prioritization logic in advance, reducing the complexity of real-time decision-making during transmission.
Data Source
AI summary
Method and apparatus for a prioritization of synchronization signals for NR-LTE in-band coexistence. The apparatus detects a first sidelink synchronization signal from a first RAT and a second sidelink synchronization signal from a second RAT. The apparatus determines a priority between a synchronization source associated with the first RAT and the second RAT. The apparatus transmits data using a timing based on a determination of the priority between the first RAT and the second RAT. The apparatus determines to transmit a sidelink synchronization signal to be the synchronization source in response to detecting the first sidelink synchronization signal from the first RAT. The apparatus determines to transmit at least one of the first sidelink synchronization signal or the second sidelink synchronization signal.