Sidelink SR Configuration via QoS Feedback
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Solution Overview
Problem
In a 5G New Radio (NR) system, base stations struggle to accurately determine Schedule Request (SR) configurations for logical channels used in sidelink data flows, due to a lack of relevant information about the sidelink data flows transmitted by terminals.
Innovation Solution
A method where terminals send sidelink information, including quality of service (QoS) parameters, to the base station, which then generates and sends SR configuration information back to the terminal to determine the appropriate SR configuration for the logical channel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the base station determines SR configuration for sidelink logical channels autonomously without terminal information, then the device complexity is reduced, but the measurement precision of SR configuration determination deteriorates
Solution Approach 1:
The terminal acts as an intermediary that provides sidelink information (QoS parameters, logical channel configurations) to the base station. This intermediary role enables the base station to make accurate SR configuration decisions without directly managing sidelink details, thus maintaining low base station complexity while achieving high configuration accuracy.
Solution Approach 2:
The terminal feeds back sidelink information to the base station, creating a feedback loop that enables the base station to determine SR configurations accurately. The base station uses this feedback information to make informed decisions about SR configurations for specific logical channels, resolving the contradiction between simplicity and accuracy.
2Reliability
If the base station obtains detailed sidelink data flow information from terminals, then the reliability of SR configuration determination is improved, but the loss of information transmission overhead increases
Solution Approach 1:
The patent extracts only the essential sidelink information (QoS parameters, logical channel configurations) that the base station needs for SR configuration determination, rather than transmitting all sidelink data flow details. This extraction approach maintains configuration reliability while minimizing information transmission overhead.
Solution Approach 2:
The terminal provides localized, specific information about each logical channel's QoS requirements and configuration parameters, rather than global sidelink information. This local quality approach ensures the base station receives precisely the information needed for accurate SR configuration without unnecessary overhead.
3Adaptability or versatility
If multiple SR configurations are provided for different logical channels, then the adaptability of the system is improved, but the device complexity increases
Solution Approach 1:
The patent segments SR configurations by logical channel, with each logical channel having its own dedicated SR configuration based on specific QoS requirements. This segmentation enables high adaptability for different service types while managing complexity through structured, channel-specific configuration rules rather than global complexity.
Data Source
AI summary
A method for determining a schedule request, SR, configuration, applied in a terminal, including: sending, by the terminal, sidelink information to a base station, where the sidelink information includes a quality of service, QoS, parameter corresponding to a first logical channel for transmitting a first sidelink data flow; receiving, by the terminal, SR configuration information generated by the base station based on the sidelink information, where the SR configuration information is configured to indicate an SR configuration of the first logical channel; and determining, by the terminal, the SR configuration of the first logical channel based on the SR configuration information.