Priority-Based Preemption Control for Wireless Channel Resources
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Solution Overview
Problem
Current wireless communication systems face inefficiencies due to unnecessary preemption and cancellation of channels without considering priority, leading to increased latency and resource mismanagement.
Innovation Solution
A method where a base station configures user equipment (UE) to apply preemption indications based on channel priority, using parameters in configuration messages to determine operation states for downlink preemption and uplink cancellation, thereby optimizing the use of time-frequency resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If preemption indication is applied without considering channel priority, then resource allocation flexibility is improved, but latency increases and resource management efficiency deteriorates
Solution Approach 1:
The patent applies different preemption handling rules to different channels based on their priority levels. High-priority channels (e.g., URLLC) are exempt from preemption while low-priority channels (e.g., eMBB) are subject to preemption when resources are needed for higher-priority traffic. This local differentiation resolves the contradiction by making resource allocation flexible where needed while protecting time-critical channels from preemption-induced latency.
Solution Approach 2:
The system dynamically determines whether to apply preemption indication based on the priority of the affected channel. The base station evaluates channel priority levels and selectively applies preemption only to appropriate channels, creating a dynamic resource allocation mechanism that adapts to different service requirements and avoids unnecessary latency for high-priority traffic.
2Productivity
If preemption indication is applied without considering channel priority, then resource utilization is improved, but resource management efficiency deteriorates
Solution Approach 1:
The patent implements priority-based preemption where the base station evaluates channel priority before applying preemption indication. High-priority channels are protected while low-priority channels can be preempted, ensuring that resource management decisions are made with awareness of service requirements. This resolves the contradiction by maintaining efficient resource utilization while preventing mismanagement of time-critical resources.
Solution Approach 2:
The system incorporates channel priority information as feedback in the preemption decision-making process. The base station uses knowledge of channel priorities to intelligently determine which channels should be preempted, creating a feedback mechanism that improves resource management efficiency while maintaining high resource utilization through selective preemption.
3Adaptability or versatility
If operation state parameter is added to configuration message, then priority-based preemption control is improved, but signaling overhead increases
Solution Approach 1:
The patent introduces an operation state parameter that can take different values to indicate different preemption behaviors (e.g., apply preemption to all channels vs. apply preemption only to low-priority channels). This parameter-based approach provides flexible priority-based control while minimizing signaling overhead by using a compact indicator rather than extensive configuration messages.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. The methods, systems, and devices may enable a base station to determine an operation state for a user equipment (UE) that corresponds to how the UE applies a preemption indication. The base station may indicate the operation state to the UE using a parameter of a configuration message. The base station may transmit a grant indicating time-frequency resources scheduled for the UE. The UE may identify a priority of a channel associated with the scheduled resources. The base station may determine a number of scheduled resources to be preempted or canceled and may indicate these resources to the UE using a preemption indication. The UE may determine remaining time-frequency resources based on the preemption indication, the priority of the channels, the operation state, or a combination thereof.