Uplink Burst Data Scheduling via LBT-Adaptive Placement
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Solution Overview
Problem
Current wireless communication systems, particularly in new radio (NR) and LTE technologies, face challenges in efficiently scheduling high-priority data transmission in uplink bursts, especially when listen-before-talk (LBT) procedures fail, leading to missed transmission opportunities.
Innovation Solution
The proposed solution involves flexible data placement techniques in uplink bursts, where user equipment (UE) can dynamically determine the optimal transmission occasion based on channel acquisition success and data priority, allowing for placement in later transmission occasions to ensure successful transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If data is transmitted in the earliest available grant, then transmission delay is reduced, but transmission reliability deteriorates when LBT procedure fails
Solution Approach 1:
The patent applies dynamics by making the data placement strategy adaptive rather than fixed. The UE dynamically determines whether to place high-priority data in the earliest grant or in a later grant based on real-time LBT procedure outcomes. This dynamic adjustment resolves the contradiction by allowing the system to optimize for delay when LBT succeeds and for reliability when LBT fails, rather than being constrained to a static earliest-grant placement rule.
Solution Approach 2:
The patent changes the parameter of data placement position based on channel access conditions. When LBT procedure fails, the system changes the placement parameter from 'earliest grant' to 'later grant within the same uplink burst', thereby transforming the transmission strategy to maintain reliability while still utilizing the scheduled uplink resources effectively.
2Reliability
If data is placed in later transmission occasions, then transmission reliability is improved, but transmission delay increases
Solution Approach 1:
The system dynamically adjusts data placement timing based on LBT outcomes. Rather than always placing data in later occasions, the UE only does so when necessary (when LBT fails for earlier grants). This dynamic approach maintains reliability when needed while minimizing delay in favorable conditions.
Solution Approach 2:
The patent applies partial action by delaying data placement only to the extent necessary to ensure successful transmission. Instead of always using later grants, the system uses later grants partially - only when LBT failure makes earlier grants unavailable - thereby achieving reliability improvement without excessive delay.
3Device complexity
If fixed data placement strategy is used, then system complexity is reduced, but adaptability to channel conditions deteriorates
Solution Approach 1:
The patent introduces dynamic adaptability through a conditional data placement mechanism that responds to LBT procedure outcomes. The UE evaluates channel access success and automatically adjusts data placement decisions, providing adaptability to varying channel conditions without requiring complex external scheduling control.
Solution Approach 2:
The UE performs self-service by autonomously determining optimal data placement based on its own LBT procedure results. The device independently assesses channel access conditions and makes placement decisions without requiring complex network-side scheduling intervention, thereby achieving adaptability while keeping system complexity manageable.
Data Source
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AI summary
Certain aspects of the present disclosure provide techniques for high priority data scheduling in uplink bursts. Aspects provide a method that may be performed by a user equipment (UE). The method generally includes receiving one or more uplink grants scheduling a plurality of transmission occasions for the UE. The method generally includes performing a listen-before-talk (LBT) procedure to attempt to acquire a channel for transmitting in at least one of the plurality of transmission occasions. The method generally includes determining one or more of the plurality of transmission occasions to transmit data based, at least in part, on the LBT procedure.