Wireless Resource Preemption Handling via Preliminary Action
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Solution Overview
Problem
In wireless communication systems, particularly in 5G NR, there is a challenge in efficiently managing resource preemption and cancellation to prioritize high-priority communications, leading to potential delays and resource wastage when originally scheduled resources are preempted or cancelled.
Innovation Solution
A method and apparatus for determining subsequent resources for communication when originally scheduled resources are preempted or cancelled, allowing devices to dynamically adjust and continue communication by receiving preemption or cancellation indications, which can implicitly or explicitly specify new resources, thereby reducing delay and ensuring continuous communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If resources are preempted or cancelled to prioritize high-priority communications, then communication priority is improved, but delay and resource wastage increase
Solution Approach 1:
The system pre-configures alternative resources and pre-determines replacement relationships before preemption occurs. When resources are preempted or cancelled, the affected device can immediately switch to pre-identified alternative resources without waiting for new scheduling decisions, thereby reducing delay while maintaining communication priority.
Solution Approach 2:
The system implements a feedback mechanism where preemption/cancellation indications are sent to affected devices, which then provide status information about their communication state. This feedback loop enables the network to track and manage resource reallocation efficiently, ensuring that high-priority communications are maintained while minimizing overall system delay.
2Reliability
If resources are preempted or cancelled to prioritize high-priority communications, then communication priority is improved, but resource utilization efficiency deteriorates
Solution Approach 1:
When resources are preempted or cancelled, the system recovers these resources by allocating them to high-priority communications. The original low-priority communications are redirected to alternative resources, ensuring that resources are continuously utilized for valuable communications rather than remaining idle or wasted.
Solution Approach 2:
The system dynamically adjusts resource allocation based on real-time communication priority requirements. Resources are not statically assigned but can be flexibly reallocated through preemption and cancellation mechanisms, allowing the system to optimize resource utilization efficiency while maintaining necessary communication priorities.
3Reliability
If new resources are granted after preemption or cancellation, then communication continuity is improved, but delay increases
Solution Approach 1:
The system performs preliminary actions by pre-configuring alternative resources and establishing replacement relationships before preemption or cancellation occurs. This advance preparation enables affected devices to immediately switch to alternative resources upon receiving preemption/cancellation indications, ensuring communication continuity without the delay associated with ad-hoc resource allocation.
Data Source
AI summary
Aspects described herein relate to preempting or cancelling sidelink or uplink resources of one or more devices to allow sidelink or uplink transmissions of one or more other devices, and/or determining subsequent resources for transmitting communications based on the preempted or cancelled sidelink or uplink resources. In an aspect, an indication to preempt receiving communications or cancel transmitting communications over scheduled resources can be received, and based at least in part on the indication, subsequent resources over which to receive or transmit the communications can be determined. The communications can be received or transmitted in the subsequent resources.