Sidelink Synchronization Signal Selection in V2X Networks
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Solution Overview
Problem
In the context of 5G communication systems, there is a need for an efficient method to transmit and receive synchronization signals between terminals, particularly in environments where both 4G and 5G base stations coexist, to ensure high reliability and data rates, especially for vehicle-to-everything (V2X) communication scenarios where coverage and synchronization between different base stations are challenging.
Innovation Solution
A method and apparatus for transmitting and receiving sidelink synchronization signals (SLSS) in a wireless communication network, where user equipment (UE) receives SLSS from multiple sources, including GNSS, eNB, gNB, and other V2X UEs, based on priority order information, and selects the appropriate signal for communication. This involves configuring SLSS transmission parameters, such as RSRP thresholds and timing, to ensure synchronization across different base station coverage areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If synchronization signals are transmitted in mixed 4G/5G environments, then coverage and synchronization between different base stations are improved, but system complexity and interference management become more difficult
Solution Approach 1:
The patent segments the synchronization signal transmission by defining different signal types (PSS, SSS, PBCH) with distinct functions and priorities. It further segments the transmission resources by allocating specific time-frequency resources for different base station types (4G eNB vs 5G gNB), allowing independent management and reducing overall system complexity while maintaining synchronization reliability
Solution Approach 2:
The patent introduces synchronization signal blocks (SSBs) as intermediary structures that mediate between 4G and 5G base stations. These SSBs contain embedded information about base station type and synchronization status, acting as a common language that enables coordinated operation across heterogeneous networks without requiring complex direct interaction between different base station systems
2Area of stationary object
If multiple synchronization sources are used, then synchronization coverage is improved, but signal selection and management complexity increase
Solution Approach 1:
The patent applies local quality by assigning different priorities and characteristics to synchronization signals based on their source and type. Each synchronization signal block contains specific quality indicators and priority levels that allow receiving devices to locally evaluate and select appropriate signals without requiring complex global optimization, thereby expanding coverage while managing selection complexity
Solution Approach 2:
The patent implements preliminary action by pre-configuring synchronization signal parameters, priorities, and resource allocations before transmission. Base stations pre-establish synchronization signal blocks with embedded metadata about their capabilities and synchronization status, allowing receiving devices to make quick selection decisions without complex real-time analysis, thus expanding effective coverage while simplifying signal management
Data Source
AI summary
The disclosure provides a communication method performed by a vehicle-to-everything (V2X) user equipment (UE) in a wireless communication network, the communication method including: receiving, from a plurality of sidelink (SL) synchronization sources, at least one sidelink synchronization signal (SLSS), based on priority order information; and performing V2X communication based on the received at least one SLSS.