Sidelink Coordination Signaling for DRX-Aware Resource Reservation
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Solution Overview
Problem
Existing sidelink communication protocols in wireless networks face inefficiencies in resource allocation and coordination among devices, leading to suboptimal data transmission and reception, particularly in scenarios with high device density and varying traffic loads.
Innovation Solution
Implementing sidelink inter-UE coordination mechanisms that facilitate dynamic resource selection and reservation through coordinated sensing and signaling between wireless devices, optimizing resource usage and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If base stations communicate with diverse devices supporting different releases and capabilities, then device compatibility is improved, but system complexity increases
Solution Approach 1:
The patent segments device capabilities into different release versions (e.g., Release 15, Release 16, Release 17) and applies different coordination mechanisms tailored to each release. This allows the system to handle diverse device capabilities without requiring a single complex mechanism that must accommodate all possible variations, thereby reducing overall system complexity while maintaining compatibility.
Solution Approach 2:
The patent implements dynamic capability indication where wireless devices can signal their supported coordination schemes based on their release version. The base station adapts its coordination approach in real-time based on the device's indicated capabilities, allowing flexible accommodation of different device types without hardcoding complex logic for every possible device configuration.
2Productivity
If coordination information is transmitted frequently to improve resource allocation efficiency, then resource allocation efficiency is improved, but signaling overhead increases
Solution Approach 1:
The patent implements periodic coordination information transmission where the coordinating wireless device transmits coordination information at predetermined intervals rather than continuously or on every resource allocation event. This periodic approach maintains resource allocation efficiency by ensuring timely updates while significantly reducing signaling overhead compared to continuous transmission.
Solution Approach 2:
The patent changes the transmission parameters of coordination information based on traffic conditions and resource allocation patterns. When resource allocation is stable, transmission frequency is reduced; when changes are detected, transmission frequency increases. This dynamic parameter adjustment optimizes the balance between resource allocation efficiency and signaling overhead.
Data Source
AI summary
A wireless device receives a first message configuring one or more time intervals for transmissions of coordination information for one or more sidelink transmissions by a second wireless device. The coordination information indicates a set of resources for the one or more sidelink transmissions and/or a resource collision between a first resource and a second resource. A first sidelink control information (SCI) of the one or more sidelink transmissions includes a parameter indicating resource reservation of the first resource and the first wireless device receives a second SCI indicating resource reservation of the second resource. The wireless device selects, from the one or more time intervals, a time interval based on a discontinuous reception (DRX) active time of the second wireless device. The wireless device transmits, during the DRX active time and to the second wireless device and based on the time interval, the coordination information.