Sidelink Resource Sensing for Low-Collision SL Signal Transmission
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Solution Overview
Problem
Sensing UEs in sidelink communication systems, lacking channel encoding/decoding modules, cannot parse SCI from communication UEs, leading to higher resource collision probabilities due to inability to avoid resources reserved by communication UEs.
Innovation Solution
A sensing device measures signals in specific time and frequency units, determining resource availability before transmission to avoid collisions by sending or not sending SL signals based on measurement results, using separate resource pools to minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If sensing UEs use simple radar sensing modules without channel encoding/decoding modules, then device complexity and cost are reduced, but the ability to parse SCI and avoid resource collisions deteriorates
Solution Approach 1:
The patent divides the resource pools into separate communication resource pools and sensing resource pools. Communication UEs operate in communication resource pools while sensing UEs operate in sensing resource pools, preventing resource collisions without requiring sensing UEs to have complex decoding capabilities. This segmentation allows simple radar sensing modules to function reliably without needing to parse SCI.
Solution Approach 2:
The patent introduces resource pool configuration as an intermediary mechanism managed by the network device. The network device configures separate resource pools for communication and sensing, acting as a mediator that prevents resource conflicts between the two types of UEs. This intermediary approach eliminates the need for sensing UEs to have complex decoding functionality while maintaining reliable resource allocation.
2Device complexity
If sensing UEs transmit sensing signals without parsing SCI, then device complexity is reduced, but resource collision probability increases
Solution Approach 1:
The patent segments the time-frequency resources into distinct communication resource pools and sensing resource pools. Sensing UEs are configured to transmit only in sensing resource pools, which are separated from communication resource pools used by communication UEs. This segmentation ensures that sensing signals and communication signals do not collide, allowing simple sensing UEs to operate reliably without SCI parsing capability.
Solution Approach 2:
The network device performs preliminary configuration of separate resource pools for communication and sensing before UEs begin transmission. By pre-allocating distinct resource pools and informing UEs of their designated pools through RRC configuration, the system prevents resource collisions before they occur, eliminating the need for runtime SCI parsing by sensing UEs.
3Productivity
If communication and sensing use overlapping frequency domain resources, then spectrum efficiency is improved, but interference between sensing and communication UEs increases
Solution Approach 1:
The patent segments frequency domain resources into separate communication resource pools and sensing resource pools. Each pool operates in distinct frequency ranges or uses orthogonal resources, preventing interference between communication and sensing transmissions. This segmentation maintains spectrum efficiency by fully utilizing available frequency resources while eliminating harmful interference through spatial-frequency separation.
Solution Approach 2:
The patent applies local quality by assigning different resource pool characteristics to different frequency domains. Communication resource pools and sensing resource pools have distinct frequency allocations or orthogonal structures, allowing each type of transmission to have optimized quality characteristics for its specific function while preventing interference with the other type.
Data Source
AI summary
This application relates to a communication method and an apparatus. A sensing device receives a first signal in at least one last time subunit in a first time unit and a first frequency domain unit set, and measures the first signal. The sensing device sends a first sensing signal in a second time unit and a second frequency domain unit set when a measurement result of the first signal meets a first condition. For example, if the second time unit is not occupied by another device, the sensing device may send SL signals in the second time unit; or if the second time unit is occupied by another device, the sensing device may not send SL signals in the second time unit. In this manner, a probability of resource collision can be reduced, and SL signal transmission quality can be improved.