Common Reference Signals for Sidelink Interference Detection
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Solution Overview
Problem
Communication devices in different communication systems cannot sense interference from each other due to different signaling formats, leading to interference issues between systems.
Innovation Solution
A communication method and apparatus that utilizes a common reference signal to enable interference detection and resource allocation, allowing devices to identify and avoid interference by determining optimal transmission resources based on signal measurement results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different communication systems use different signaling formats for reference signals, then each system can optimize its own signal format, but communication devices cannot sense interference from other systems
Solution Approach 1:
The patent introduces a common reference signal that can be universally recognized across different communication systems (first communication system and second communication system). This reference signal serves multiple functions: it enables interference detection between systems, provides timing information, and maintains compatibility across different signaling formats. By establishing a universal reference mechanism, the patent resolves the contradiction between system-specific optimization and cross-system interference detection.
2Device complexity
If communication devices do not have a common reference signal, then system complexity is reduced, but interference between different communication systems cannot be avoided
Solution Approach 1:
The common reference signal acts as an intermediary element between different communication systems. Instead of requiring direct recognition between diverse signaling formats, the reference signal serves as a mediator that enables devices to detect and measure interference. The reference signal is transmitted by a network device and received by terminal devices, providing a common basis for interference measurement without requiring complex direct compatibility between different systems.
3Speed
If terminal devices perform sidelink transmission without interference sensing, then transmission speed is maintained, but interference from downlink transmission cannot be avoided
Solution Approach 1:
The patent implements preliminary interference measurement before sidelink transmission occurs. Terminal devices measure the common reference signal and calculate interference levels in advance, then use this information to select appropriate resources for sidelink transmission. This preliminary action enables devices to avoid interfering resources without delaying the actual transmission, as the interference assessment is completed beforehand.
Solution Approach 2:
The system establishes a feedback mechanism where terminal devices report interference measurement results to network devices, which then provide guidance for resource selection. The network device receives interference information from the terminal device and uses this feedback to determine suitable resources for sidelink transmission, creating a closed-loop system that maintains transmission speed while avoiding interference.
Data Source
AI summary
A communication method and apparatus are provided. First indication information indicates a first terminal device to send SL data on a second resource, which indicates that the first terminal device is a device that performs SL transmission. The first terminal device may receive, on a first resource determined based on configuration information, a common reference signal sent by a network device, to obtain a signal measurement result, and send the signal measurement result to the network device. Therefore, the first terminal device that performs SL transmission may sense interference from a Uu communication system by identifying the common reference signal sent by the network device, and may further notify the network device of a magnitude of the interference.