Radio Network Node TCP Session Proxy for Mobile Latency

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Solution Overview

Problem

Current traffic acceleration solutions in mobile telecommunication networks are limited by high latency between the Radio Network Node and the end user, which negatively impacts the Quality of Experience (QoE) and business performance due to suboptimal TCP settings for mobile networks.

Innovation Solution

Deployment of a TCP session originating from a Radio Network Node with adapted TCP parameters, utilizing a proxy to optimize TCP settings based on radio link conditions, thereby reducing latency and improving network efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traffic acceleration is deployed at GGSN level in mobile networks, then service coverage is provided, but latency remains high due to distance from end users

Engineering Contradiction:

Improveservice coverageVSAvoidlatency

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent segments the mobile network infrastructure into multiple deployment levels: GGSN-level acceleration for broad service coverage and RNC-level acceleration for low-latency local optimization. This segmentation allows the system to provide both wide coverage and reduced latency by placing acceleration functions at appropriate network depths.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent extends the deployment dimension from a single GGSN level to multiple network levels including RNC. By adding the RNC level as an additional dimension in the network architecture, the system achieves both coverage (through GGSN) and low latency (through RNC proximity to end users).

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Adaptability or versatility

If standard TCP settings are used in mobile networks, then compatibility is maintained, but performance is suboptimal due to high latency and radio link characteristics

Engineering Contradiction:

ImprovecompatibilityVSAvoidnetwork performance

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

The patent applies local quality by implementing TCP parameter adaptation specifically at the RNC level for mobile radio links, while maintaining standard TCP settings in other parts of the network. This localized optimization improves mobile network performance without compromising overall system compatibility.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent changes TCP parameters (such as window size, timeout values, and congestion control settings) to be adapted for mobile radio link characteristics including high latency and variable bandwidth. These parameter changes optimize performance for mobile networks while maintaining TCP protocol compatibility.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS10349305B2Method for enabling traffic acceleration in a mobile telecommunication network

Publication Date: 2019.07.09 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

AI summary

A radio network node of a mobile telecommunication network. The radio network node configured to determine a TCP session based on TCP parameters adapted for a radio link on which end user traffic is to be transported. The radio network node also configured to originate the TCP session which is used to transport the end user traffic.