Sidelink Relay Selection Using QoS and Link Quality Indicators
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Solution Overview
Problem
Conventional wireless communication systems lack the ability to efficiently select relay UE devices based on Quality of Service (QoS) requirements for sidelink communication, as they do not provide specific information about the sidelink quality between candidate relay UE devices and peer UE devices, leading to suboptimal relay selection.
Innovation Solution
The implementation of messages, such as Model A and Model B discovery messages, that include sidelink quality information and QoS indicators, allowing UE devices to select relay UE devices based on the required QoS and measured signal quality values, enabling efficient relay selection and reselection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional relay selection is used without sidelink quality information, then the relay selection process is simple, but the relay selection accuracy and QoS matching capability deteriorate
Solution Approach 1:
The discovery message is segmented into distinct fields: basic relay identification information, sidelink quality information (separated into quality indicator and threshold indicator), and QoS parameter information. This segmentation allows the receiver to process different types of information independently and makes the complex message structure manageable and interpretable.
Solution Approach 2:
The patent performs preliminary actions by pre-calculating and embedding sidelink quality indicators and QoS parameters in the discovery message before transmission. This allows the receiving UE to make relay selection decisions based on pre-provided quality information without needing to perform additional complex measurements or calculations, thereby improving selection accuracy while controlling complexity.
2Adaptability or versatility
If sidelink quality information is included in discovery messages, then the QoS matching capability improves, but the information processing complexity increases
Solution Approach 1:
The patent transforms complex sidelink quality characteristics into simplified parameter indicators that can be directly compared against QoS requirements. By changing the representation of quality information into standardized parameters (quality indicator, threshold indicator, QoS parameters), the system achieves versatile QoS matching while keeping processing complexity manageable through parameter-based comparison rather than complex analysis.
Solution Approach 2:
The discovery message acts as an intermediary that carries pre-processed sidelink quality information from the relay UE to the remote UE. This intermediary structure enables QoS matching by providing a standardized interface for quality information exchange, allowing UEs to make informed relay selection decisions without directly implementing complex quality assessment mechanisms.
3Reliability
If relay selection is based on comprehensive QoS requirements, then the service reliability improves, but the selection time increases
Solution Approach 1:
The patent performs preliminary actions by pre-calculating and embedding sidelink quality indicators and QoS parameters in the discovery message before transmission. This allows the receiving UE to make relay selection decisions based on pre-provided quality information without needing to perform additional complex measurements or calculations, thereby improving selection accuracy while controlling complexity.
Solution Approach 2:
The patent replaces complex real-time quality measurement and assessment mechanisms with a streamlined information exchange system based on pre-packaged discovery messages. By substituting direct complex measurements with standardized message-based information transfer, the system achieves reliable QoS-based selection while significantly reducing the time required for relay selection.
Data Source
AI summary
A receiver in a first user equipment (UE) device receives a message from a relay UE device where the message comprises link quality information regarding a communication link between the relay UE device and a second UE device. A controller in the first UE device executes a relay selection procedure for selecting a U2U relay connection between the first UE device and the second CE device for an application. The relay selection procedure is based, at least partially, on a Quality of Service (QoS) requirement of an application and the link quality information.