Hybrid Access Gateway Packet Classification for DSL LTE Congestion

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Solution Overview

Problem

The existing bonding of DSL and LTE access technologies for internet access fails to provide bandwidth higher than that offered by DSL alone, due to congestion and interference issues, leading to reduced throughput rates and packet loss.

Innovation Solution

A hybrid access gateway that classifies packets based on committed information rates of DSL and LTE links, dynamically allocating them to ensure optimal transmission by switching between links to avoid congestion and control delays, thereby improving transmission efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If DSL and LTE access technologies are bonded to access the Internet, then bandwidth bottleneck is broken, but bandwidth higher than DSL alone cannot be provided due to congestion and interference

Engineering Contradiction:
ImprovebandwidthVSAvoidcongestion and interference
Core Design Contradiction:
ProductivityVSReliability

Solution Approach 1:

The patent implements dynamic link selection and packet classification based on real-time congestion detection. The hybrid access gateway monitors the congestion status of both DSL and LTE links, dynamically classifying packets into different types (first-type for DSL, second-type for LTE) based on committed information rates (CIR) and current network conditions. This dynamic adaptation allows the system to optimize bandwidth utilization while avoiding congested links, thereby resolving the contradiction between achieving high bandwidth and maintaining reliability.

Inventive Principle:
Principle #15Dynamics

2Speed

If VDSL is used to provide high downlink rate, then theoretical bandwidth is increased, but actual rate is reduced by copper wire length and external signal interference

Engineering Contradiction:
Improvedownlink rateVSAvoidcopper wire length and external signal interference
Core Design Contradiction:
SpeedVSObject-affected harmful factors

Solution Approach 1:

The patent combines DSL and LTE access technologies into a hybrid access gateway that leverages the strengths of both connections. By merging these two different access methods, the system compensates for the weaknesses of VDSL (copper wire limitations and interference) with the complementary characteristics of LTE, achieving reliable high-speed access that overcomes the harmful factors affecting single-technology performance.

Inventive Principle:
Principle #5Merging (Combining)

3Productivity

If packet classification and dynamic allocation is implemented, then transmission efficiency is improved, but system complexity increases

Engineering Contradiction:
Improvetransmission efficiencyVSAvoidpacket classification and dynamic allocation mechanism
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The patent segments packets into different types (first-type and second-type) based on their transmission requirements and the current status of available links. This segmentation approach simplifies the classification process by using clear criteria (CIR values and congestion status) to determine packet routing, thereby improving transmission efficiency without excessive system complexity. The segmentation allows independent optimization of each packet type while maintaining overall system manageability.

Inventive Principle:
Principle #1Segmentation

Data Source

PatentEP3550774B1Packet transmission method and hybrid access gateway
Publication Date: 2022.04.13 HUAWEI TECH CO LTD
  • EP3550774B1 patent drawingFigure 1~3B
  • EP3550774B1 patent drawingFigure 4~5
  • EP3550774B1 patent drawingFigure 6~7B

AI summary

The present invention relates to a packet transmission method and a hybrid access gateway. The hybrid access gateway receives packets that are sent by a network side device and destined for a home gateway, when detecting that congestion occurs on a first transmission link and that no congestion occurs on a second transmission link, obtains a first CIR of the first transmission link and a second CIR of the second transmission link, classifies the packets into a first-type packet and a second-type packet, and transmits the first-type packet by using the first transmission link and the second-type packet by using the second transmission link. This can ensure that when congestion occurs on the first transmission link but no congestion occurs on the second transmission link, the first transmission link and the second transmission link are connected to the hybrid access gateway in a hybrid access manner. By properly allocating packets transmitted on the second transmission link, the hybrid access gateway can control one-way delays of the first transmission link and the second transmission link, thereby avoiding a packet loss caused by a sequencing buffer overflow, and greatly improving transmission efficiency of link transmission.