Envoy Packet Duplicator Modules Reduce Wide Area Network Latency

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Solution Overview

Problem

Mobile IP (MIP) architecture experiences high latency and packet loss, making it unsuitable for real-time data and voice communications in wide area networks, particularly for low-latency group voice calls with multiple mobile destinations.

Innovation Solution

The implementation of a method that includes envoy packet duplicator modules within infrastructure devices to directly communicate duplicated group message packets to other infrastructure devices, reducing the need for intermediaries and minimizing message exchanges, thereby simplifying communication pathways and reducing throughput delay.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If Mobile IP architecture is used for wide area network communications, then mobile devices can maintain permanent IP addresses and move between networks, but latency increases and packet loss occurs making it unsuitable for real-time communications

Engineering Contradiction:

Improvemobile device mobilityVSAvoidcommunication latency

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The patent segments the communication path by introducing multiple infrastructure devices distributed across different networks that directly exchange group message packets. This segmentation eliminates the need for packets to traverse through a single home agent, reducing latency while maintaining mobile device connectivity across networks.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent establishes communication pathways between infrastructure devices in advance before real-time communication is needed. By pre-configuring direct packet exchange routes between infrastructure devices, the system eliminates setup delays during actual group calls while maintaining the ability to support mobile devices moving between networks.

Inventive Principle:

Principle #10Preliminary action

2Ease of operation

If traditional centralized call control servers are used, then communication management is simplified, but system costs and complexity increase due to leased communication lines and multiple servers

Engineering Contradiction:

Improvecommunication managementVSAvoidsystem architecture

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent extracts the call control functionality from centralized servers and distributes it across multiple infrastructure devices. Each infrastructure device independently manages local communication operations and directly exchanges packets with other infrastructure devices, eliminating the need for expensive leased lines and centralized call control servers while maintaining operational simplicity.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent enables infrastructure devices to autonomously manage their own communication operations without relying on centralized control servers. Each infrastructure device independently handles packet routing, group message distribution, and communication management for its associated mobile devices, reducing system complexity and eliminating recurring leased line costs.

Inventive Principle:

Principle #25Self-service

3Area of stationary object

If multiple infrastructure devices are deployed across wide areas, then communication coverage is improved, but the number of message exchanges and intermediaries increases causing delays

Engineering Contradiction:

Improvenetwork coverage areaVSAvoidmessage exchange delay

Core Design Contradiction:

Area of stationary objectVSLoss of time

Solution Approach 1:

The patent segments the network into distributed infrastructure devices that independently exchange packets directly with each other. This segmentation allows wide area coverage through multiple geographically distributed devices while eliminating the need for sequential message exchanges through centralized intermediaries, reducing delay despite increased network scope.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent eliminates traditional centralized intermediaries (home agents and call control servers) by enabling direct peer-to-peer packet exchange between infrastructure devices. This removal of intermediary hops reduces message exchange delays while maintaining wide area coverage through the distributed infrastructure device network.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS8116230B2Establishing communication pathways between infrastructure devices in a group communication system implemented over a wide area network

Publication Date: 2012.02.14 MOTOROLA SOLUTIONS INC

AI summary

A method and apparatus is provided for establishing communication pathways between infrastructure devices in a wide area communication network prior to transmission of a group message packet by a source wireless communication device (WCD). In one implementation, the infrastructure devices (IDs) can include a home ID of the source WCD, a first ID and a second ID. A home steward module (HSM) of the source WCD generates a distribution list (DL) for communications from the source WCD to a first communication group (CG), and communicates it to an envoy packet duplicator module (EPDM) located at the first ID. The first CG includes, for example, a first destination WCD. A first network socket of the EPDM is communicated from the HSM to a second envoy module (located at the second ID) for the first destination WCD. The HSM maps a second network socket for the second envoy module to an identifier of the first destination WCD, and communicates this mapping to the EPDM. A first communication connection can then be established between the first network socket and the second network socket.