Bandwidth Determination for Low-Latency Burst Data Streams

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Solution Overview

Problem

Existing bandwidth allocation methods for ultra-reliable low-latency communication (uRLLC) in 5G networks fail to meet latency requirements due to transient burst traffic, leading to increased transmission latency and packet loss.

Innovation Solution

A method to determine a required bandwidth for data stream transmission by considering network device and link transmission latencies, ensuring that the sum of these latencies plus the service requirement latency does not exceed a predetermined threshold, thereby ensuring low-latency and reliable data stream transmission.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If network resources are deployed based on average traffic bandwidth, then network stability is improved, but transmission latency increases during burst traffic

Engineering Contradiction:

Improvenetwork stabilityVSAvoidtransmission latency

Core Design Contradiction:

Stability of the object's compositionVSLoss of time

Solution Approach 1:

The patent performs preliminary calculation of required bandwidth by considering service requirement latency, network device transmission latency, and link transmission latency before actual data transmission. This allows the network to pre-allocate sufficient bandwidth resources to meet latency requirements even during burst traffic, preventing latency issues before they occur.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent transitions from static average bandwidth allocation to dynamic bandwidth determination based on real-time latency requirements. The control device calculates required bandwidth dynamically by considering the service requirement latency and actual transmission latencies, allowing the network to adapt bandwidth allocation to current traffic conditions while maintaining latency guarantees.

Inventive Principle:

Principle #15Dynamics

2Productivity

If bandwidth is allocated based on traffic bandwidth, then resource utilization is improved, but latency requirements for uRLLC services cannot be met

Engineering Contradiction:

Improveresource utilizationVSAvoidlatency requirement fulfillment

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent fundamentally changes the bandwidth allocation parameter from traffic bandwidth to required bandwidth calculated based on latency requirements. The control device uses the formula: required bandwidth = (service requirement latency - network device transmission latency - link transmission latency) to determine the bandwidth needed to meet latency guarantees, rather than simply allocating based on observed traffic patterns.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent calculates and uses minimum required bandwidth values that are sufficient to meet latency requirements without over-provisioning. This allows efficient resource utilization by allocating only the necessary bandwidth for each service flow while ensuring latency requirements are met, avoiding waste of network resources.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Ease of operation

If average bandwidth is used for network deployment, then network congestion is reduced under normal conditions, but transmission latency jitter occurs during burst traffic

Engineering Contradiction:

Improvenetwork management simplicityVSAvoidtransmission latency jitter

Core Design Contradiction:

Ease of operationVSLoss of time

Solution Approach 1:

The patent implements a feedback mechanism where the control device obtains service requirement latency from network devices, calculates the required bandwidth based on this feedback and transmission latencies, and then configures the bandwidth accordingly. This closed-loop approach ensures that bandwidth allocation continuously adapts to meet latency requirements while maintaining simple network management through centralized control.

Inventive Principle:

Principle #23Feedback

Data Source

PatentEP4024778B1Method for determining required bandwidth for data stream transmission, and devices and system

Publication Date: 2026.01.28 HUAWEI TECH CO LTD

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AI summary

This application provides a method, a device, and a system for determining a required bandwidth for a data stream. The method includes: obtaining, by a control device, a service requirement latency of transmitting a data stream from a first network device to a second network device; obtaining, by the control device, a network device transmission latency on a forwarding path and a link transmission latency on the forwarding path; and determining, by the control device based on the service requirement latency of the data stream and the network device transmission latency and the link transmission latency on the path for forwarding the data stream, a required bandwidth for transmitting the data stream. The foregoing method may be used to guide network resource deployment for a data stream that has a latency requirement, to ensure a low latency for data stream transmission.