Coupled Resource Pools for Sidelink Reference Signal Transmission
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G networks, face challenges in achieving enhanced spectral efficiency, reduced latency, and accurate positioning due to limitations in resource allocation and reference signal measurement techniques.
Innovation Solution
The implementation of coupled resource pools, where control information in a first resource pool points to resources in a second resource pool, allowing for improved measurement accuracy and scheduling of reference signals, enabling better channel state determination and positioning accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single resource pool is used for both control information and reference signals, then device complexity is reduced, but spectral efficiency and positioning accuracy deteriorate
Solution Approach 1:
The patent divides the resource pool into two distinct pools: a first resource pool for control information transmission and a second resource pool for reference signal transmission. This segmentation allows independent optimization of each pool's configuration, enabling better spectral efficiency and positioning accuracy without increasing overall system complexity.
Solution Approach 2:
The patent introduces a new dimension of resource pool configuration by creating coupled resource pools with different parameter sets. The first and second resource pools have different configurations (e.g., different time-frequency resources, modulation schemes), allowing the system to optimize control and reference signal transmissions separately in the configuration space.
2Ease of operation
If control information and reference signals use the same resources, then resource allocation is simplified, but measurement precision and latency are worsened
Solution Approach 1:
By segmenting resources into separate pools for control information and reference signals, the patent eliminates resource conflicts that would otherwise degrade measurement precision. Each pool can be independently configured and optimized for its specific function.
Solution Approach 2:
The patent establishes the coupling relationship between resource pools in advance through pre-defined configurations. The first resource pool configuration includes information about the second resource pool, allowing the receiver to prepare for reference signal measurements at the appropriate time and frequency resources, thereby reducing latency and improving measurement accuracy.
3Device complexity
If resource pools are configured with identical parameters, then configuration complexity is reduced, but spectral efficiency deteriorates
Solution Approach 1:
The patent applies different configuration parameters to different resource pools based on their specific functions. The first resource pool for control information has optimized parameters for robust control channel transmission, while the second resource pool for reference signals has parameters optimized for accurate channel estimation and positioning measurements.
Solution Approach 2:
The patent changes key parameters between the two resource pools, including time-frequency resource allocation, modulation and coding schemes, and reference signal patterns. These parameter differences enable each pool to operate at optimal efficiency for its specific function, thereby improving overall spectral efficiency.
Data Source
AI summary
A reference signal transmission method includes: obtaining, at a first UE, a first configuration of a first resource pool that comprises a plurality of first OFDM resources for sidelink signal transfer; obtaining, at the first UE, a second configuration of a second resource pool that comprises a plurality of second OFDM resources for sidelink signal transfer, the second configuration of the second resource pool being different from the first configuration of the first resource pool; transmitting, from the first UE to a second UE, control information in one or more of the plurality of first OFDM resources of the first resource pool, the control information indicating one or more of the plurality of second OFDM resources of the second resource pool; and transmitting, from the first UE to the second UE, a reference signal in one or more third OFDM resources of the second resource pool.