Resynchronization Signal Deployment for Low-Power Neighbor Cell Detection
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Solution Overview
Problem
The existing configuration of resynchronization signals (RSS) in wireless communication networks is inefficient for neighbor cell measurements, leading to high power consumption and cumbersome parameter transmission, especially for Bandwidth reduced Low complexity/Coverage Enhancement (BL/CE) devices.
Innovation Solution
A method for configuring RSS deployment among cells in a wireless network, allowing for efficient detection by determining deployment alternatives such as collocation or unique allocation of RSS resources within narrowbands or carriers, and providing neighbor cell RSS information in System Information messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If RSS is transmitted in every cell with unique time-frequency resources, then neighbor cell measurement accuracy is improved, but power consumption and configuration complexity increase
Solution Approach 1:
The patent merges RSS resources across multiple cells by allowing wireless devices to detect RSS from neighbor cells using the same time-frequency resources as the serving cell. This combining approach enables devices to accumulate signal energy from multiple cells, improving measurement accuracy while reducing the need for separate RSS transmissions in each cell, thereby lowering overall power consumption.
Solution Approach 2:
The patent makes the serving cell RSS serve multiple functions: it acts as the synchronization signal for the serving cell and simultaneously serves as the RSS for neighbor cell measurements. This multi-functionality eliminates the need for dedicated neighbor cell RSS resources, reducing configuration complexity and power consumption while maintaining measurement capability.
2Adaptability or versatility
If RSS configuration parameters are transmitted for each neighbor cell, then measurement capability is improved, but signaling overhead and device complexity increase
Solution Approach 1:
The patent enables the serving cell RSS to serve multiple purposes: as the primary synchronization signal and as the reference for neighbor cell measurements. This eliminates the need to transmit separate RSS configuration parameters for each neighbor cell, significantly reducing signaling overhead and device configuration complexity while maintaining full measurement capability.
Solution Approach 2:
The patent allows wireless devices to autonomously detect and measure RSS from neighbor cells using the same time-frequency resources as the serving cell, without requiring explicit network configuration for each neighbor cell. The device self-configures the measurement parameters based on the serving cell's RSS configuration, reducing signaling overhead and simplifying the system.
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AI summary
A method and apparatus are disclosed for configuration of resynchronization signal (RSS) in a radio network. In one embodiment, a wireless device (WD) is configured to determine a deployment alternative for a resynchronization signal (RSS) in the radio network, the determining of the deployment alternative including determining whether a time-frequency resource used for an the RSS in a second cell in the radio network is a same time-frequency resource as a time-frequency resource used for the RSS in the first cell. The WD is also configured to determine information about the RSS time-frequency resource used in the second cell in the radio network based at least in part on the determined deployment alternative, and to detect the RSS in the second cell using the determined information about the RSS time- frequency resource used for the RSS in the second cell.