Sidelink Feedback Channel Access Priority Class for Resource Conflict Resolution
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Solution Overview
Problem
Current mobile communication networks face challenges in efficiently managing wireless devices with multiple technologies and releases, particularly in optimizing communication protocols and resource allocation across diverse wireless devices and base stations, leading to suboptimal performance and resource conflicts.
Innovation Solution
The implementation of advanced NR user plane and control plane protocol stacks, along with sidelink communication mechanisms, enables flexible configuration and resource management across wireless devices and base stations, allowing for dynamic bandwidth adaptation, carrier aggregation, and conflict-free resource selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wireless devices support multiple technologies and releases, then device compatibility and versatility are improved, but resource allocation complexity and conflicts increase
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the channel access priority class based on the type of sidelink feedback information. Different feedback types (ACK/NACK, HARQ-ACK, CSI) are assigned different priority classes, allowing the system to manage resource allocation complexity through parameter variation while maintaining multi-technology compatibility
Solution Approach 2:
The patent segments sidelink feedback information into different types (ACK/NACK, HARQ-ACK, CSI) and assigns each segment a specific channel access priority class. This segmentation allows complex multi-technology resource allocation to be broken down into manageable, priority-based segments, reducing overall allocation complexity
2Productivity
If channel access priority class is optimized for specific feedback types, then resource allocation efficiency is improved, but system complexity increases
Solution Approach 1:
The patent implements self-service by enabling wireless devices to autonomously determine the appropriate channel access priority class based on the type of sidelink feedback information they need to transmit. The devices themselves perform the classification and priority assignment without requiring complex external configuration, thereby improving resource allocation efficiency while limiting system complexity growth
Solution Approach 2:
The patent applies preliminary action by pre-defining channel access priority classes for different types of sidelink feedback information. This preliminary classification framework is established in advance, allowing devices to efficiently allocate resources based on pre-determined priorities without requiring complex real-time decision-making or configuration
3Reliability
If sidelink feedback transmission uses dedicated physical channels, then transmission reliability is improved, but resource overhead and conflict potential increase
Solution Approach 1:
The patent applies universality by using a common physical channel (Physical Sidelink Feedback Channel - PSFCH) for multiple types of sidelink feedback transmissions. Instead of creating dedicated channels for each feedback type, the system makes the PSFCH multi-functional by allowing it to carry ACK/NACK, HARQ-ACK, and CSI information with different priority classes, thereby reducing resource overhead while maintaining transmission reliability through priority-based access control
Data Source
AI summary
A first wireless device determines a resource conflict based on a first sidelink control information (SCI) and a second SCI. The first wireless device determines a channel access priority class (CAPC) value, for a transmission of a conflict information indicating the resource conflict, based on one of the first SCI and the second SCI. The first wireless device transmits the conflict information, via a feedback channel, using the CAPC value.