Uplink Reference Signal N-Comb Configuration for Signaling Overhead Reduction
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently configuring uplink reference signal (UL RS) resources, particularly in reducing signaling overhead during positioning methods, where the starting position in the frequency domain for resource elements (RE) within UL RS resources is not optimally determined.
Innovation Solution
The method involves configuring UL RS resources as N-combs in the frequency domain, where the starting position of each RE is determined based on a comb offset included in the UL RS configuration information and a preset offset, allowing for efficient positioning by reducing signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the starting position of resource elements in UL RS resources is configured using traditional methods, then the configuration is simple, but the signaling overhead is high
Solution Approach 1:
The patent extracts the starting position indication from general UL RS configuration and creates a dedicated field (combOffset) specifically for indicating the starting position of resource elements in N-comb structured UL RS resources. This extraction allows the starting position to be indicated independently and efficiently, reducing overall signaling overhead while maintaining configuration clarity.
Solution Approach 2:
The patent introduces an intermediary parameter (combOffset) that serves as a mediator between the network device and terminal device for indicating the starting position of resource elements. This intermediary field acts as a bridge that carries the necessary positioning information in a compact and efficient manner, reducing the signaling burden while enabling precise resource element placement.
2Productivity
If UL RS resources are configured with optimized N-comb structure, then positioning efficiency is improved, but the configuration complexity increases
Solution Approach 1:
The patent segments the UL RS resources into an N-comb structure where resource elements are distributed across multiple subcarriers with regular spacing. This segmentation allows for more efficient use of frequency resources and improves positioning accuracy by providing better frequency domain sampling, while the segmentation pattern itself is simplified by using a regular comb structure rather than arbitrary resource element placement.
Solution Approach 2:
The patent changes the configuration parameters of UL RS resources by introducing the combOffset parameter that directly controls the starting position of resource elements in the frequency domain. This parameter change enables flexible and efficient resource element placement without requiring complex configuration procedures, as the combOffset can be directly mapped to specific resource element positions based on the N-comb structure.
Data Source
AI summary
A method performed by user equipment comprises: receiving a synchronization signal/physical broadcast channel (SS/PBCH) block including a primary synchronization signal, a secondary synchronization signal, and a physical broadcast channel; receiving system information based on the SS/PBCH block; receiving uplink reference signal (UL RS) configuration information; and transmitting a UL RS on a UL RS resource set based on the basis of the UL RS configuration information, wherein the UL RS resource includes at least one resource element (RE), the at least one RE is set to N-comb on a frequency domain, the start position on the frequency domain of each of the REs is determined based on a comb offset and a preset offset included in the UL RS configuration information, the preset offset is obtained based on the N-comb and at least one orthogonal frequency division multiplexing symbol of the at least one RE, and N is a natural number.