Uplink Scheduling Adaptation for LTE Signaling Overhead

Solution Overview

Problem

Current uplink scheduling methods in LTE networks face challenges in adapting to different communication scenarios, leading to increased signaling overhead and delay, particularly in ultra-reliable and low-latency services, due to the limitations of traditional uplink grant based (UGB) and uplink grant free (UGF) scheduling manners.

Innovation Solution

A method for determining the uplink scheduling manner based on communication parameters, such as data amount, channel conditions, and delay requirements, allowing user equipment to dynamically choose between UGB and UGF scheduling, reducing signaling overhead by selecting the appropriate method based on thresholds and communication conditions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If uplink grant based scheduling is used, then collision-free transmission and tight link adaptation are achieved, but signaling overhead and scheduling delay increase

Engineering Contradiction:

Improvecollision-free transmissionVSAvoidscheduling delay

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent implements dynamic switching between UGB and UGF scheduling manners based on communication parameters such as data amount, channel conditions, and delay requirements. This allows the system to adaptively select the optimal scheduling mode for different scenarios, reducing scheduling delay when using UGF for small data packets while maintaining collision-free transmission when using UGB for larger data amounts.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the scheduling parameter from fixed to variable by introducing communication parameter-based decision making. The base station determines whether to allocate resources via UL grant or grant-free based on real-time communication parameters, enabling the system to optimize between reliability and delay by adjusting the scheduling approach according to current network conditions.

Inventive Principle:

Principle #35Parameter changes

2Loss of time

If uplink grant free scheduling is used, then signaling overhead and scheduling delay are reduced, but collision and inaccurate link adaptation occur

Engineering Contradiction:

Improvesignaling overheadVSAvoidcollision avoidance

Core Design Contradiction:

Loss of timeVSReliability

Solution Approach 1:

The patent implements dynamic switching between UGB and UGF scheduling manners based on communication parameters such as data amount, channel conditions, and delay requirements. This allows the system to adaptively select the optimal scheduling mode for different scenarios, reducing scheduling delay when using UGF for small data packets while maintaining collision-free transmission when using UGB for larger data amounts.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the scheduling parameter from fixed to variable by introducing communication parameter-based decision making. The base station determines whether to allocate resources via UL grant or grant-free based on real-time communication parameters, enabling the system to optimize between reliability and delay by adjusting the scheduling approach according to current network conditions.

Inventive Principle:

Principle #35Parameter changes

3Extent of automation

If traditional LTE uplink scheduling is used, then base station control is maintained, but adaptability to different communication scenarios deteriorates

Engineering Contradiction:

Improvebase station scheduling controlVSAvoidscenario adaptability

Core Design Contradiction:

Extent of automationVSAdaptability or versatility

Solution Approach 1:

The patent implements dynamic switching between UGB and UGF scheduling manners based on communication parameters such as data amount, channel conditions, and delay requirements. This allows the system to adaptively select the optimal scheduling mode for different scenarios, reducing scheduling delay when using UGF for small data packets while maintaining collision-free transmission when using UGB for larger data amounts.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the scheduling parameter from fixed to variable by introducing communication parameter-based decision making. The base station determines whether to allocate resources via UL grant or grant-free based on real-time communication parameters, enabling the system to optimize between reliability and delay by adjusting the scheduling approach according to current network conditions.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS11425742B2Method for determining an uplink scheduling manner, user equipment and base station

Publication Date: 2022.08.23 NTT DOCOMO INC

AI summary

A method for determining an uplink scheduling manner, a user equipment and a base station are disclosed. A method for determining an uplink scheduling manner performed by a user equipment includes: determining a communication parameter regarding the user equipment; determining, based on the communication parameter and a threshold regarding the communication parameter, to perform uplink data transmission based on an uplink grant based scheduling manner, or to perform the uplink data transmission based on an uplink grant free scheduling manner.