Sidelink Preemption Triggering for Fair Resource Reallocation
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Solution Overview
Problem
Existing sidelink communication protocols lack efficient mechanisms for managing resource preemption in device-to-device (D2D) communication, leading to suboptimal utilization of available resources and potential interference.
Innovation Solution
Implementing a mechanism for sidelink preemption triggering conditions that allow wireless devices to dynamically adjust resource allocation based on traffic load, packet sizes, and traffic characteristics, ensuring fair access and efficient use of resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing sidelink communication protocols are used, then device-to-device communication can be established, but resource utilization is suboptimal and interference occurs
Solution Approach 1:
The patent implements dynamic resource allocation for sidelink preemption by allowing wireless devices to select resources from a configured resource pool based on real-time conditions. The resource allocation is not static but adapts to changing traffic loads and channel conditions, enabling devices to dynamically adjust their resource usage to optimize utilization and reduce interference with other transmissions.
Solution Approach 2:
The patent changes key parameters including resource pool configuration, preemption triggering conditions, and priority levels to improve resource utilization. By configuring specific parameters such as the resource pool size, preemption thresholds, and priority values, the system can adapt to different scenarios and optimize performance while reducing harmful interference through parameter optimization.
2Productivity
If dynamic resource allocation is implemented, then resource utilization improves, but protocol complexity increases
Solution Approach 1:
The patent segments the resource allocation process into distinct components: resource pool configuration, preemption triggering conditions, and actual resource selection. This segmentation allows each component to be independently optimized and managed, reducing overall protocol complexity while maintaining dynamic resource allocation capabilities. The MAC layer handles resource selection based on configured parameters without requiring complex cross-layer optimization.
Solution Approach 2:
Wireless devices autonomously select their own resources from the configured pool based on simple triggering conditions, without requiring complex centralized scheduling or extensive signaling. Each device independently evaluates preemption conditions and selects resources according to configured parameters, reducing protocol complexity while achieving dynamic resource allocation through self-service mechanisms.
Data Source
AI summary
A method may include selecting, by a wireless device, first resources for a first sidelink transmission having a first priority value. The method may also include receiving sidelink control information (SCI) indicating second resources for a second sidelink transmission having a second priority value. The first resources may overlap with the second resources and the first priority value may be greater than the second priority value. The method may further include determining to trigger a sidelink preemption of the first resources, based on the first priority value being higher than a first priority threshold and based on the second priority value being lower than a second priority threshold. The method may additionally include transmitting, in response to the determining, the first sidelink transmission via third resources.