Two-Stage Synchronization Signal Detection for Dense TRP Networks
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Solution Overview
Problem
In Cell-Free networks with high Transmission Reception Point (TRP) density, the limited synchronization signal resources lead to increased interference between neighboring cells and complex network deployment.
Innovation Solution
Implementing a two-stage synchronization signal transmission method where the terminal determines the need to detect a second synchronization signal based on the signal quality of a first synchronization signal, using metrics like RSRP, RSRQ, or SINR, to reduce interference and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If cell densification is increased to accommodate more TRPs, then the number of TRPs that can be deployed increases, but synchronization signal interference between neighboring cells increases
Solution Approach 1:
The patent segments the cell structure into multiple TRPs (Transmission Reception Points) within the same cell, allowing each TRP to transmit synchronization signals using the same resources without causing inter-cell interference. This segmentation enables more TRPs to be deployed while maintaining synchronization signal quality by confining interference within the same cell where it can be managed through coordinated transmission.
Solution Approach 2:
The patent makes synchronization signal resources universal across multiple TRPs within a cell, allowing the same synchronization signal resources to be reused by different TRPs. This multi-functionality approach enables resource efficiency where limited synchronization signal resources can serve multiple TRPs simultaneously without requiring additional resources for each TRP.
2Productivity
If cell size is reduced to allow reuse of synchronization signal resources, then resource reuse efficiency improves, but network deployment complexity increases
Solution Approach 1:
The patent merges multiple TRPs into a unified cell structure that shares common synchronization signal resources and coordination mechanisms. By combining the synchronization signal transmission functions of multiple TRPs under a single cell-level resource management framework, the system achieves resource reuse efficiency without requiring each small cell to independently manage its own synchronization resources, thereby reducing overall deployment complexity.
3Reliability
If more synchronization signal resources are allocated to support higher TRP density, then synchronization signal coverage improves, but available resources are depleted
Solution Approach 1:
The patent transitions from a two-dimensional resource allocation approach (time and frequency) to a three-dimensional approach by adding the spatial dimension through multiple TRPs. Synchronization signals from different TRPs occupy the same time-frequency resources but are differentiated by spatial location and beam direction, effectively multiplying the capacity of available resources without depleting them.
Solution Approach 2:
The patent creates multiple copies of the same synchronization signal resources across different TRPs within a cell. These copies use identical time-frequency resources but are transmitted from different spatial locations, allowing the system to maintain synchronization signal coverage and reliability while reusing the same resource templates repeatedly across multiple TRPs.
Data Source
AI summary
A synchronization signal transmission method includes: receiving, by a terminal, a first synchronization signal sent by a network-side device; and obtaining signal quality of the first synchronization signal; and determining, by the terminal based on the signal quality, whether to detect a second synchronization signal. The signal quality includes at least one of the following: Reference Signal Received Power (RSRP); Reference Signal Received Quality (RSRQ); or a Signal to Interference plus Noise Ratio (SINR).