Uplink Scheduling Requests Using Time and Size Information
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Solution Overview
Problem
Conventional wireless communication systems face challenges in efficiently managing uplink traffic with event-driven but predictable packet arrival, leading to increased latency and reduced spectral and power efficiency, particularly in new radio (NR) ultra-reliable and low latency (URLLC) systems.
Innovation Solution
User equipment (UE) is configured to transmit time and size information of upcoming uplink data packets as uplink control information (UCI), allowing the base station to schedule grants accordingly, thereby reducing latency and improving spectral and power efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If conventional grant-based transmission methods are used, then uplink traffic can be transmitted, but latency increases and spectral and power efficiency are reduced
Solution Approach 1:
The UE performs preliminary actions by determining the time and size of upcoming UL data packets before actual transmission occurs. This advance information is sent to the BS, allowing the BS to prepare and issue grants proactively, thereby reducing latency while optimizing resource allocation for spectral and power efficiency.
Solution Approach 2:
The control data is segmented into distinct components: time information and size information about upcoming UL packets. This segmentation allows the BS to process and schedule different packets independently, improving overall system efficiency and reducing waiting time for grant allocation.
2Productivity
If conventional uplink scheduling is used, then uplink data can be transmitted, but the delay associated with grant-based transmission methods increases
Solution Approach 1:
The UE sends control data containing time and size information of upcoming UL packets to the BS in advance. This preliminary action enables the BS to prepare scheduling decisions beforehand, significantly reducing the delay between data readiness and actual transmission while maintaining efficient uplink throughput.
3Reliability
If event-driven packet arrival is managed conventionally, then uplink traffic can be handled, but spectral efficiency is reduced
Solution Approach 1:
The UE provides feedback to the BS by transmitting control data that includes time and size information about upcoming event-driven packets. This feedback mechanism enables the BS to make informed scheduling decisions, optimizing spectral efficiency while reliably handling unpredictable packet arrivals by allocating resources only when and where needed.
Data Source
AI summary
Disclosed herein are systems and methods for providing low-latency uplink scheduling requests. For instance, a user equipment (UE) can determine a time of transmission of uplink (UL) data by the UE to a UL device. The UE can further generate control data comprising the determined time of transmission and size information for the UL data. The UE can further provide the control data to the UL device prior to providing the UL data to the UL device. The UE can further receive a UL grant from the UL device. The UE can further provide the UL data to the UL device in response to receiving the UL grant.