UL RS N-Comb Configuration for Wireless Positioning
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently configuring uplink reference signal (UL RS) resources for positioning, leading to increased signaling overhead due to fixed starting positions in the frequency domain.
Innovation Solution
A method for configuring UL RS resources as N-combs in the frequency domain, where the starting position of each resource element is determined based on a comb offset included in the UL RS configuration information and a preset offset, allowing for flexible positioning and reduced signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If fixed starting positions in the frequency domain are used for UL RS resources, then resource allocation is simplified, but signaling overhead increases
Solution Approach 1:
The patent applies dynamics by making the starting position of UL RS resources variable rather than fixed. The starting position is dynamically determined based on the comb offset parameter and preset offsets, allowing the system to adapt resource allocation to different positioning scenarios while reducing the need for extensive signaling to configure fixed positions.
Solution Approach 2:
The patent changes the parameter of starting position from a fixed value to a dynamically determined value based on comb offset and preset offsets. This parameter transformation allows the system to convey more information efficiently by encoding starting positions through offset parameters rather than explicit resource position signaling, thereby reducing signaling overhead.
2Productivity
If flexible starting positions are used for UL RS resources, then positioning efficiency improves, but system complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-defining offset values and comb structures before actual positioning operations. The preset offsets and comb configurations are established in advance, allowing the system to quickly determine starting positions during positioning operations without complex real-time calculations, thus improving positioning efficiency while managing system complexity.
Solution Approach 2:
The patent uses comb offset as an intermediary parameter to bridge the relationship between resource configuration and positioning requirements. Instead of directly configuring starting positions, the system uses comb offset as a mediator that determines starting positions through a standardized calculation process, simplifying the configuration interface while enabling flexible positioning.
3Loss of information
If N-comb configuration is used for UL RS resources, then signaling overhead is reduced, but measurement precision requirements increase
Solution Approach 1:
The patent applies segmentation by dividing the frequency domain into N-combs, where each comb provides a structured set of subcarriers for UL RS resources. This segmentation allows the system to determine starting positions with precision by selecting specific comb indices and offsets, reducing the need for detailed signaling while maintaining accurate resource positioning through the comb structure.
Data Source
AI summary
According to an aspect of the present disclosure, a method performed by a user equipment (UE) in a wireless communication system comprises: receiving uplink reference signal (UL RS) configuration information; and transmitting a UL RS via a UL RS resource configured on the basis of the UL RS configuration information, wherein the UL RS resource includes at least one resource element (RE), the UL RS is for positioning, the at least one RE is configured as N-comb in a frequency domain, a start position in the frequency domain of each of the at least one RE is determined on the basis of a preconfigured offset and a comb offset included in the UL RS configuration information, and the preconfigured offset is acquired on the basis of the N-comb and at least one orthogonal frequency division multiplexing (OFDM) symbol of the at least one RE, wherein N is a natural number.