Sidelink Positioning Signal Resource Mapping for Precise Allocation
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Solution Overview
Problem
The existing global navigation satellite systems (GNSS) fail to meet high precision requirements for location determination in certain applications, and the sidelink positioning technology lacks a clear method for determining resources for transmission of sidelink positioning reference signals.
Innovation Solution
A communication method and apparatus that flexibly indicate resources for sidelink positioning reference signals by determining identifiers based on time domain resource length and start position, allowing for flexible and accurate resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GNSS is used for location determination, then location information can be obtained, but positioning precision does not satisfy high precision requirements
Solution Approach 1:
The patent introduces sidelink positioning reference signals as an intermediary mechanism between devices to enable direct mutual positioning. This mediator allows devices to determine relative positions through signal exchange without relying solely on GNSS, thereby achieving high-precision positioning in scenarios where GNSS precision is insufficient.
2Measurement precision
If sidelink positioning technology is adopted to achieve high precision positioning, then positioning precision is improved, but the method for determining transmission resources becomes unclear and complex
Solution Approach 1:
The patent determines sidelink positioning reference signal transmission resources by changing and specifying key parameters including time domain start position, time domain length, frequency domain position, and resource identifier. This parameter-based approach transforms the complex resource determination problem into a structured process with clear configurable parameters, reducing system complexity while enabling flexible resource allocation.
3Adaptability or versatility
If flexible resource indication is implemented for sidelink positioning reference signals, then resource allocation flexibility is improved, but signaling overhead may increase
Solution Approach 1:
The patent segments the resource indication into multiple independent parameter components: time domain parameters (start position, length), frequency domain parameters (position, bandwidth), and resource identifier. This segmentation allows each parameter to be indicated separately and efficiently, reducing overall signaling overhead while maintaining flexible resource allocation capabilities.
Data Source
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AI summary
This application provides a communication method and a communication apparatus. The method includes: A first communication apparatus obtains an identifier of a first resource, where the first resource is used for transmission of a reference signal, for example, a sidelink positioning reference signal, and the identifier of the first resource is determined based on at least one of the following: a length of a time domain resource available for transmission of the sidelink positioning reference signal, a start position of a time domain resource for transmission of the sidelink positioning reference signal, and a length of the time domain resource for transmission of the sidelink positioning reference signal; and the first communication apparatus sends the sidelink positioning reference signal on the first resource. In view of this, a unified manner of generating an identifier of a resource of a sidelink positioning reference signal can be designed, so that the resource of the sidelink positioning reference signal can be flexibly indicated.