Sidelink Reference Signal Resource Pools for Accurate Positioning
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Solution Overview
Problem
Existing sidelink communication systems face challenges in efficiently allocating resources for sidelink reference signals (SL-RS), particularly in scenarios where network devices are not involved, affecting positioning accuracy and channel status determination.
Innovation Solution
A method for resource allocation configuration for SL-RS, involving a resource pool set and time-frequency location, or dedicated resource pool with predetermined bandwidth, to determine resources for SL-RS transmission, enabling wideband communication and improved detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If resource allocation is configured using existing sidelink communication methods, then communication between devices can be established, but positioning accuracy and channel status determination are degraded due to insufficient resource allocation flexibility
Solution Approach 1:
The patent implements dynamic resource allocation for SL-RS by allowing the network device to flexibly configure and adjust resource pools based on channel conditions, device locations, and service requirements. The terminal device can dynamically select resources from configured pools and switch between different resource allocation modes (network-configured vs. autonomous selection), enabling adaptive optimization of positioning and channel status determination accuracy according to varying operational conditions.
2Reliability
If dedicated resources are allocated for SL-RS communication, then positioning and channel status determination can be performed, but system complexity increases due to multiple resource pool configurations
Solution Approach 1:
The patent segments resource allocation into distinct resource pools dedicated for SL-RS communication, separating them from general data transmission resources. The network device configures multiple resource pools with different characteristics (e.g., frequency ranges, time slots, bandwidths), and the terminal device selects appropriate pools based on specific positioning or channel status determination requirements. This segmentation enables reliable dedicated resource allocation while managing complexity through structured organization.
Solution Approach 2:
The patent creates a universal resource pool configuration framework where the same resource pool structure serves multiple purposes: positioning reference signals, channel status determination, and general sidelink communication. The network device can configure resource pools that are reusable across different functions, and the terminal device can autonomously select from these universal pools for different operations, reducing overall system complexity while maintaining reliability.
3Measurement precision
If multiple resource pools are configured for SL-RS, then wideband communication and improved detection accuracy are achieved, but resource allocation overhead increases
Solution Approach 1:
The patent implements preliminary configuration of multiple resource pools by the network device before actual SL-RS transmission. The network device pre-configures resource pools with different bandwidths, frequency locations, and time slots based on predicted positioning and channel status requirements. The terminal device receives these pre-configured pools and can directly select from them without requiring real-time resource negotiation, reducing resource allocation overhead while maintaining the ability to achieve wideband communication and high detection accuracy when needed.
Data Source
AI summary
Example embodiments of the present disclosure relate to a solution for resource allocation configuration for a sidelink reference signal. In this solution, a first communication device obtains a resource allocation configuration for a sidelink reference signal, the resource allocation configuration comprising: a first resource allocation configuration indicating a resource pool set and a time-frequency location in the resource pool set, the resource pool set comprising a plurality of resource pools for sidelink communication, or a second resource allocation configuration indicating a number of resource units selected from a dedicated resource pool for communication of the sidelink reference signal, a resource unit being of a predetermined bandwidth. The first communication device determines a resource allocated for the sidelink reference signal based on the resource allocation configuration, and performs communication of the sidelink reference signal with at least one second communication device using the determined resource.