Base Station Uplink Grant Pre-scheduling for Air Interface Delay Reduction

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Solution Overview

Problem

In LTE systems, the air interface delay between base stations and user equipment is significant due to the need for scheduling requests and acknowledgments, particularly in TCP services, which affects data transmission rates and increases latency.

Innovation Solution

A method and base station configuration that calculates downlink speed and service type to predict when to assign an uplink grant, allowing for pre-scheduling of ACK/NACK transmissions, thereby reducing the need for scheduling requests and minimizing air interface delay.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of time

If the base station waits for scheduling requests from user equipment before assigning uplink grants, then the resource allocation is more conservative and avoids waste, but the air interface delay increases significantly

Engineering Contradiction:

Improveair interface delayVSAvoiddata transmission rate

Core Design Contradiction:

Loss of timeVSProductivity

Solution Approach 1:

The base station performs preliminary actions by proactively assigning uplink grants before the user equipment sends scheduling requests. The base station predicts when uplink grants should be assigned based on downlink speed calculations and service type identification, thereby reducing air interface delay and improving data transmission rates without causing resource waste.

Inventive Principle:

Principle #10Preliminary action

2Productivity

If the base station dynamically assigns transmission resources based on data amount, then resource utilization is optimized, but the complexity of resource management increases

Engineering Contradiction:

Improveresource utilization efficiencyVSAvoidresource management complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The base station changes parameters by calculating downlink speed and identifying service type to determine optimal uplink grant assignment timing. This parameter-based approach enables dynamic resource allocation while managing complexity through automated decision-making based on measurable metrics.

Inventive Principle:

Principle #35Parameter changes

3Productivity

If the base station continuously monitors and adjusts uplink grants, then transmission efficiency is improved, but the processing overhead and latency increase

Engineering Contradiction:

Improvetransmission efficiencyVSAvoidprocessing latency

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The base station uses feedback mechanisms by calculating downlink speed based on actual transmission data and using this information to adjust uplink grant assignments. This feedback loop improves transmission efficiency while minimizing processing latency through automated adjustments.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS10278201B2Method for transmitting uplink grant and base station

Publication Date: 2019.04.30 SERCOMM CORP

AI summary

A method for transmitting an uplink grant message and a base station are provided. The method includes the following steps. Calculate a downlink speed currently used by a user equipment. Obtain a service type currently used by the user equipment. Determine whether to assign an uplink grant to the user equipment according to the downlink speed and the service type.