Split IPv6 and IPv4 Interfaces for Concurrent AT and TD Connectivity

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Current CDMA 2000 networks cannot support concurrent Internet Protocol (IP) connectivity to an Access Terminal (AT) and a Tethered Device (TD) using different IP protocols, which is necessary for advanced IMS services like VoIP, as ATs must remain continuously connected to the IP network, making it impossible to support TDs during data sessions.

Innovation Solution

Implementing split interfaces for IPv6 and IPv4 protocols, where the IPv6 interface is used for the AT to maintain constant connectivity and the IPv4 interface is used for the TD, allowing bridging to enable concurrent IP connectivity by forwarding packets between the two interfaces.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the AT maintains continuous IP connectivity for IMS services, then IMS service availability is improved, but the ability to support TD connectivity is worsened

Engineering Contradiction:

ImproveIMS service availabilityVSAvoidTD connectivity support

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent segments the network interface into two distinct protocol interfaces: an IPv6 interface for the AT to maintain continuous IMS connectivity, and an IPv4 interface for the TD to access general Internet services. This segmentation allows each device to use its required protocol independently, resolving the contradiction between maintaining AT connectivity and supporting TD connectivity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system employs a protocol translation mechanism that acts as an intermediary between IPv6 and IPv4 protocols. The AT communicates with the network using IPv6, while the TD uses IPv4, and the system translates between these protocols to enable concurrent connectivity for both devices without interfering with each other's protocol requirements.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Device complexity

If a single IP protocol is used for both AT and TD, then system complexity is reduced, but protocol compatibility and service optimization are worsened

Engineering Contradiction:

Improveprotocol interface configurationVSAvoidprotocol optimization

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The patent applies local quality by assigning different IP protocol characteristics to different interfaces: the IPv6 interface is optimized for AT-IMS service requirements with continuous connectivity, while the IPv4 interface is optimized for TD general Internet access. Each interface has tailored protocol properties suited to its specific function, improving overall system adaptability without significantly increasing complexity.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS7860088B2Concurrent internet protocol connectivity to an access terminal and a tethered device

Publication Date: 2010.12.28 QUALCOMM INC

AI summary

Using split interfaces for Internet Protocol version 6 (IPv6) and Internet Protocol version 4 (IPv4), and bridging the IPv4 interface, makes it possible to support a Tethered Device (TD) and an Access Terminal (AT) having concurrent IP connectivity. This configuration enables the support of IP Multimedia Subsystem (IMS) applications in the AT using IPv6 while concurrently supporting general Internet usage on a TD. It is also possible to bridge an IPv6 interface to the TD.