Sidelink Positioning Signal Transmission via Unoccupied Resources
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Solution Overview
Problem
The limited resources for sidelink-based positioning in cellular communication systems pose a challenge for effective transmission of positioning reference signals, necessitating improved resource utilization.
Innovation Solution
A method and apparatus for determining and utilizing unoccupied candidate resources within a sensing window for transmitting positioning reference signals on sidelinks, including mechanisms for resource sensing and dynamic parameter adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If positioning reference signals are transmitted on sidelink, then positioning functionality is enabled, but resource limitations cause transmission reliability to deteriorate
Solution Approach 1:
The patent implements dynamic resource selection where the terminal device senses the sidelink channel and dynamically selects from multiple candidate resources based on current channel conditions. This dynamic approach allows the system to adapt to varying resource availability and maintain transmission reliability despite limited resources.
Solution Approach 2:
The patent changes the parameter of resource selection from static allocation to dynamic selection based on sensing results. By monitoring channel occupancy and selecting unoccupied candidate resources, the system optimizes resource utilization and improves transmission reliability within the constrained resource environment.
2Reliability
If resource sensing is performed continuously, then transmission reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements periodic resource sensing within a defined sensing window rather than continuous sensing. The terminal device performs sensing at specific intervals and selects resources based on the sensing results, achieving reliable resource selection while reducing power consumption compared to continuous monitoring.
Solution Approach 2:
The patent performs resource sensing in advance within a sensing window before actual transmission. This preliminary action allows the terminal to identify suitable candidate resources ahead of time, ensuring reliable transmission while avoiding the need for continuous sensing during the entire operation period.
3Reliability
If multiple candidate resources are selected, then transmission success probability increases, but resource waste increases
Solution Approach 1:
The patent selects N candidate resources from the available candidate set, where N is optimized to achieve sufficient transmission success probability without selecting all possible resources. This partial action approach balances transmission reliability with resource efficiency, avoiding the waste that would result from selecting excessive resources.
Data Source
AI summary
The present disclosure provides a method and apparatus for signal transmission, to achieve sidelink reference signal transmission, thereby improving the resource utilization rate of a sidelink. The method includes: determining a candidate resource set for transmitting the reference signal according to reference-signal transmission resource information; determining at least one unoccupied candidate resource in the candidate resource set within a resource sensing window; and transmitting the reference signal on N candidate resources in the at least one candidate resource within the resource selection window, where N is a positive integer greater than or equal to 1.