Scheduling Request Preemption in Wireless User Equipment
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Solution Overview
Problem
Current wireless communication systems, particularly in LTE and NR technologies, face challenges in efficiently managing preempted scheduling requests, which can lead to resource conflicts and priority handling issues as demand for mobile broadband access increases.
Innovation Solution
Implementing methods and apparatuses in user equipment (UE) to determine preempted scheduling requests and perform preemption actions, such as decrementing counters, stopping or restarting timers, and treating requests as pending, based on priority and resource availability, to ensure efficient resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If scheduling requests are transmitted without preemption capability, then transmission reliability is maintained, but resource utilization efficiency deteriorates due to inability to accommodate higher-priority traffic
Solution Approach 1:
The patent implements dynamic preemption of scheduling requests based on priority levels. When higher-priority traffic arrives, the system dynamically interrupts lower-priority scheduling requests that are currently being processed or transmitted. This is achieved through priority-based scheduling mechanisms that allow real-time adjustment of request handling, enabling the system to adapt to changing traffic conditions while maintaining overall reliability through proper state management and counter adjustments.
2Speed
If preemption actions are implemented for scheduling requests, then system responsiveness to high-priority traffic improves, but system complexity increases due to additional management mechanisms
Solution Approach 1:
The patent segments the scheduling request management into distinct components: counters for tracking request states, timers for managing transmission delays, and priority-level handlers for different traffic types. Each component operates independently but coordinates through standardized interfaces. This segmentation allows the complex preemption functionality to be implemented through modular, manageable units that can be maintained and modified separately, reducing overall system complexity while maintaining responsiveness.
Solution Approach 2:
The system implements feedback mechanisms through counters that track the state of scheduling requests (pending, transmitted, preempted) and timers that monitor transmission timelines. When preemption occurs, the system provides feedback by adjusting these counters and timers to reflect the new state, ensuring that the scheduling management entity has accurate information for making subsequent decisions. This feedback loop maintains system coherence without requiring complex centralized control.
3Adaptability or versatility
If scheduling requests are preempted without proper signaling, then resource allocation flexibility improves, but information accuracy deteriorates due to loss of request state tracking
Solution Approach 1:
The patent implements preliminary actions by maintaining counters and timers in specific states before preemption occurs. When a scheduling request is initiated, the system pre-configures the appropriate counter values and timer settings based on the request's priority and type. If preemption occurs, these pre-established state representations allow the system to accurately restore or adjust the request state without losing information, enabling flexible resource reallocation while preserving complete tracking of request lifecycles.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may determine that processing or transmission associated with a scheduling request is preempted, and perform one or more scheduling request preemption actions, associated with the scheduling request, based at least in part on determining that the processing or transmission is preempted. Numerous other aspects are provided.