CSI-RS Configuration for Cell Discovery in Dense Networks
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In dense radio communications networks, existing reference signals (RS) lead to unnecessary interference and require complex network assistance for UE measurements, limiting measurement robustness and increasing network complexity.
Innovation Solution
The use of Channel State Information Reference Symbols (CSI-RS) is optimized for discovery signals, allowing UEs to identify individual transmission points with minimal network assistance by reconfiguring CSI-RS configurations and applying precoding matrices, reducing interference and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing reference signals (RS) are used for discovery signals in dense networks, then measurement coverage is maintained, but unnecessary interference increases and network complexity increases
Solution Approach 1:
The patent applies universality by enabling CSI-RS to serve dual purposes: traditional channel state information measurement and discovery signal transmission. By configuring CSI-RS resources to function as discovery signals, the system eliminates the need for separate reference signal structures, thereby reducing network complexity while maintaining measurement robustness through the established CSI-RS framework
Solution Approach 2:
The patent employs parameter changes by modifying CSI-RS configuration parameters (such as resource allocation, periodicity, and sequence generation) to optimize discovery signal performance. By adjusting these parameters, the system reduces interference in dense deployments while maintaining reliable measurements, thus resolving the contradiction between measurement robustness and network complexity
2Reliability
If existing reference signals (RS) are used for discovery signals, then measurement coverage is maintained, but signaling overhead increases
Solution Approach 1:
By making CSI-RS multi-functional as both channel state reference signals and discovery signals, the patent eliminates redundant signaling. The same CSI-RS configuration that supports channel measurements also enables discovery operations, thereby reducing signaling overhead while preserving measurement robustness through the unified signal structure
Solution Approach 2:
The patent merges the functions of CSI-RS and discovery signals into a single unified signal structure. This consolidation eliminates the need for separate signaling configurations for discovery operations, reducing overhead while maintaining measurement reliability through the integrated CSI-RS framework
3Device complexity
If CSI-RS configurations are reconfigured for discovery signals, then network complexity is reduced, but measurement precision may be affected
Solution Approach 1:
The patent carefully adjusts CSI-RS configuration parameters (resource allocation, periodicity, sequence generation) to optimize both discovery signal performance and measurement precision. By selecting appropriate parameter values, the system maintains accurate measurements while reducing network complexity through the simplified unified signal structure
Solution Approach 2:
The patent applies local quality by optimizing specific CSI-RS configuration parameters for discovery signal requirements in particular deployment scenarios. By tailoring parameters such as resource allocation and periodicity to local network conditions, the system maintains measurement precision while reducing overall network complexity
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
A method performed by a wireless device is presented. The method comprises receiving Channel State Information Reference Symbol, CSI-RS, configuration information comprising a plurality of CSI-RS configurations and determining a cell identity, ID, among a plurality of cell IDs, the cell ID being associated with a plurality of received synchronization signals. The method also comprises determining at least one CSI-RS configuration among the plurality of CSI-RS configurations based on the determined cell ID and performing measurements based on the at least one CSI-RS configuration.