Timing Difference Determination for Wireless Backhaul Synchronization
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Solution Overview
Problem
The challenge in wireless communication systems, particularly in high-frequency communication systems like the new radio (NR) system, is the limited coverage performance due to high free-propagation loss, oxygen absorption, and rain fade, which are exacerbated by the shortage of frequency spectrum resources.
Innovation Solution
A timing difference determination method and apparatus that calculate the timing difference based on parameters related to timing parameters, timing advances, or physical resources, such as frequency ranges and sub-carrier spacings, to ensure network synchronization and reduce mutual interference among nodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If high-frequency carrier (28 GHz, 45 GHz, or 70 GHz) is used for communication, then bandwidth requirements are satisfied, but coverage performance deteriorates due to larger free-propagation loss, oxygen absorption, and rain fade
Solution Approach 1:
The patent segments the network into parent nodes and child nodes with wireless backhaul links, separating the core network function from remote access points. This allows high-frequency carriers to be used for access links while microwave/mmWave carriers provide reliable backhaul connections, effectively dividing the communication function to overcome coverage limitations.
Solution Approach 2:
The patent introduces wireless backhaul transmission as an intermediary between parent nodes and child nodes. This intermediary uses dedicated backhaul carriers (microwave or mmWave) to bridge the coverage gap, allowing high-frequency access carriers to operate without being constrained by their limited propagation distance.
2Reliability
If more antenna elements are accommodated per unit area to enable beamforming, then antenna gains increase and coverage performance is ensured, but network deployment cost increases
Solution Approach 1:
The patent makes wireless backhaul transmission serve multiple functions: it provides both network connectivity for child nodes and timing synchronization reference for the entire network. This multi-functionality eliminates the need for separate synchronization infrastructure, reducing deployment complexity while maintaining coverage performance through beamforming.
Solution Approach 2:
The patent enables the wireless backhaul link to self-provide timing synchronization information to child nodes. Instead of requiring external synchronization sources or complex coordination infrastructure, each child node autonomously obtains timing references from its parent node through the existing backhaul connection, simplifying network deployment.
3Ease of manufacture
If wireless backhaul transmission is introduced to reduce network deployment cost, then ease of manufacture improves, but timing synchronization between nodes becomes more challenging
Solution Approach 1:
The patent establishes timing synchronization relationships in advance during network configuration. Parent nodes and child nodes are pre-configured with timing advance parameters and synchronization configurations before actual operation, ensuring that timing synchronization is already optimized when wireless backhaul transmission begins, eliminating subsequent coordination complexity.
Solution Approach 2:
The patent implements feedback mechanisms where child nodes measure timing differences relative to parent nodes and report these measurements back. Parent nodes use this feedback to adjust timing advance parameters, creating a closed-loop synchronization system that automatically compensates for wireless backhaul variations and maintains precise timing alignment.
Data Source
AI summary
Provided are a timing difference determination method and apparatus, a device, and a storage medium. The timing difference determination method includes: determining a timing parameter based on at least one of the following parameters: a parameter related to the timing parameter, a parameter related to a timing advance, or a parameter related to a physical resource.