UE Scheduling Restrictions for Canceled Uplink Symbols
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Solution Overview
Problem
Existing wireless communication systems face increased complexity and overhead due to unused symbols resulting from uplink cancellation indications or conflicts between channels of different priorities, leading to inefficient resource management.
Innovation Solution
Implementing scheduling restrictions at the user equipment (UE) to prevent rescheduling of unused symbols for lower priority transmissions, based on priority comparisons and UE capabilities, to reduce complexity and overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base station transmits cancellation indications to cancel uplink channels, then higher priority channels can be transmitted, but scheduling complexity and overhead increase due to unused symbols
Solution Approach 1:
The patent applies preliminary action by having the UE determine in advance whether to expect rescheduling of unused symbols based on pre-configured scheduling restriction rules. The UE evaluates channel priorities and cancellation indication types before actual rescheduling occurs, preparing the scheduling decision ahead of time to avoid complex real-time processing.
Solution Approach 2:
The UE performs self-service by autonomously determining whether to expect rescheduling based on its own capabilities and the received cancellation indication. The UE independently evaluates the scheduling restriction rules and makes the determination without requiring additional network signaling or complex coordination.
2Productivity
If the base station reschedules unused symbols for lower priority transmissions, then resource utilization improves, but signaling overhead increases
Solution Approach 1:
The patent extracts the rescheduling decision logic from the main scheduling process and separates it into a determination phase. The UE determines in advance whether rescheduling will occur based on priority comparisons and cancellation indication types, extracting the decision-making function to reduce ongoing signaling requirements.
Solution Approach 2:
The patent changes the parameter of scheduling restriction based on priority levels and cancellation indication types. By modifying the scheduling behavior parameters according to these conditions, the system achieves better resource utilization while controlling signaling overhead through parameter-based control rather than continuous signaling.
3Device complexity
If the UE determines scheduling restrictions based on priority comparisons, then unnecessary rescheduling is limited, but determination complexity increases
Solution Approach 1:
The patent segments the determination process into distinct evaluation steps: first evaluating the cancellation indication type, then comparing channel priorities, and finally determining whether rescheduling should be limited. This segmentation breaks down the complex determination into manageable, sequential checks that reduce overall complexity.
Solution Approach 2:
The patent applies partial action by implementing scheduling restrictions only when necessary, based on the specific combination of cancellation indication types and priority levels. Rather than applying universal restrictions, the system applies partial restrictions only to cases where they are needed, reducing determination complexity through selective application.
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AI summary
Methods, systems, and devices for wireless communications are described. The described techniques provide for a user equipment (UE) receiving a first transmission scheduling resources for a second transmission having a first priority. The UE may determine that one or more symbols of the second transmission are to be unused due to receipt of a cancellation indication or due to identifying a conflict, for example, with higher priority resources. Based on determining that the symbols are to be unused, the UE may determine that the base station will not reschedule the unused resources for another transmission, for example, having the first priority. The UE and the base station may communicate based on the determination.