Wireless Device Indication for NR-U Resource Rescheduling
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Solution Overview
Problem
In the context of New Radio (NR) unlicensed spectrum (NR-U), multi-TTI scheduling can lead to a loss of scheduling flexibility and overbooked resources, resulting in wasted resources due to mismatched buffer status between User Equipment (UE) and the gNB, especially when there is insufficient data to fill allocated slots.
Innovation Solution
A method where a wireless communication device transmits an indication that no information will be transmitted on certain allocated transmission occasions, allowing the base station to reschedule these resources for other devices, thereby maintaining scheduling flexibility and avoiding resource wastage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-TTI scheduling is used to allocate transmission resources, then resource allocation efficiency is improved, but scheduling flexibility is reduced and resource wastage increases due to buffer status mismatch
Solution Approach 1:
The patent introduces dynamic indication mechanisms (such as DCI formats, MAC CE, or RRC signaling) that allow the UE to inform the gNB about its actual buffer status and transmission intentions in real-time. This enables the gNB to dynamically adjust scheduling decisions, transforming the static multi-TTI allocation into a flexible, adaptive process that can respond to changing buffer conditions while maintaining overall scheduling efficiency
Solution Approach 2:
The patent implements feedback loops where the UE sends indications about its buffer status, data availability, or transmission cancellation intentions back to the gNB. The gNB uses this feedback to refine future scheduling decisions, creating a closed-loop system that balances resource allocation efficiency with scheduling flexibility by continuously adapting to actual UE needs
2Productivity
If transmission resources are allocated in advance for multiple TTIs, then resource utilization is optimized, but resource wastage occurs when UE buffer status does not match allocated slots
Solution Approach 1:
The patent allows the gNB to allocate resources in advance (preliminary action) while simultaneously establishing mechanisms for the UE to indicate when it cannot or will not use allocated resources. This enables the gNB to prepare scheduling decisions early while retaining the ability to correct potential wastage before actual transmission occurs, thus optimizing resource utilization without committing to rigid allocations
Solution Approach 2:
The patent enables the gNB to discard (revoke or reallocate) transmission occasions that the UE indicates it will not use, and recover these resources for allocation to other UEs or purposes. This mechanism transforms potential resource wastage into recoverable resources, maintaining high overall resource utilization while adapting to actual UE buffer status
Data Source
AI summary
The method comprises receiving an allocation of transmission occasions of a channel on a plurality of time periods, and transmitting an indication that no information will be transmitted on at least one of the plurality of transmission occasions.