Downlink Control Information for Uplink Resource Cancellation
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Solution Overview
Problem
Existing wireless communication systems face challenges in managing conflicts between high-priority and low-priority services due to overlapping uplink resources, leading to potential collisions and performance degradation, with undefined conditions for UE cancellation of overlapping transmissions.
Innovation Solution
Implementing predefined protocols and conditions for Uplink Cancelation Indication (UL CI) to manage resource preemption, allowing UEs to accurately cancel overlapping uplink transmissions based on specific timing and duration thresholds, ensuring reliable scheduling of high-priority services without undue restrictions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If uplink resources are allocated for low-priority services, then resource utilization is improved, but collisions with high-priority services occur leading to reliability degradation
Solution Approach 1:
The system performs preliminary actions by scheduling low-priority uplink transmissions in advance while reserving the right to cancel them. The network evaluates priority levels before resource allocation and pre-establishes cancellation conditions, allowing high-priority services to preempt low-priority resources when necessary without actual collisions occurring.
Solution Approach 2:
The invention changes the parameter of service priority levels and introduces dynamic cancellation indicators. By modifying the scheduling parameters to include priority-based cancellation rights and time-window constraints, the system resolves the contradiction between resource utilization and collision-free transmission through controlled parameter adjustments rather than static resource allocation.
2Reliability
If uplink transmissions are canceled to ensure high-priority service, then reliability is improved, but transmission time is lost
Solution Approach 1:
The system implements skipping by allowing high-priority services to rapidly preempt low-priority transmissions within a defined time window. When a high-priority service needs resources, the system immediately cancels the overlapping low-priority transmission without waiting for completion, effectively skipping the low-priority transmission in time to guarantee high-priority service delivery.
Solution Approach 2:
The network performs preliminary evaluation of priority levels and pre-establishes cancellation time windows before actual transmission occurs. This preliminary action allows the system to quickly determine when cancellation is necessary and execute it within minimal time, reducing the loss of transmission time while ensuring high-priority service reliability.
3Adaptability or versatility
If cancellation conditions are made flexible to handle overlapping resources, then adaptability is improved, but UE processing complexity increases
Solution Approach 1:
The invention segments the cancellation processing into distinct, manageable components: priority level identification, time window calculation, and cancellation decision logic. By dividing the complex cancellation condition evaluation into these segmented functions, the UE can handle resource overlaps systematically without overwhelming processing complexity.
Solution Approach 2:
The system simplifies UE processing by changing the parameters to be evaluated - using predefined priority levels and time window thresholds rather than complex real-time optimization. This parameter-based approach maintains adaptability for handling resource overlaps while significantly reducing the computational burden on UEs compared to flexible but complex cancellation algorithms.
Data Source
AI summary
Systems and methods for wireless communications are disclosed herein. In one implementation, a wireless communication device determines that at least a portion of a first uplink (UL) resource is canceled due to overlapping with an indicated resource indicated by an UL Cancelation Indication (UL CI) received from a base station. In one implementation, in response to determining that the at least the portion of the first UL resource is canceled due to overlapping with the indicated resource, a wireless communication device determines whether a second UL resource is used to transmit UL data.