Communication Node Mobility Condition Determination for Multihoming

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Solution Overview

Problem

In communication nodes with both mobility management and multihoming functions, existing systems fail to appropriately select addresses that reflect mobility conditions, leading to issues like delays and packet losses due to inappropriate address selection.

Innovation Solution

A communication node with integrated multihoming control, mobility management, and mobility condition determination means that selects appropriate addresses based on mobility conditions, ensuring accurate address selection for communication partners.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a communication node maintains multiple IP addresses from different networks (multihoming), then the node can communicate through multiple networks simultaneously, but the node cannot appropriately select addresses that reflect mobility conditions, leading to delays and packet losses

Engineering Contradiction:
Improvemultihoming capabilityVSAvoidcommunication reliability
Core Design Contradiction:
Adaptability or versatilityVSReliability

Solution Approach 1:

The mobility condition determination unit receives mobility conditions from the mobility management unit and uses this feedback to dynamically determine appropriate address selection conditions. This feedback mechanism ensures that address selection adapts to current mobility states, preventing packet loss and delays by selecting addresses that reflect the node's actual mobility situation.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The mobility condition determination unit acts as an intermediary between the mobility management unit and the multihoming control unit. It processes mobility conditions and translates them into address selection conditions, mediating the interaction between mobility management and multihoming operations to ensure coherent address selection.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Adaptability or versatility

If a communication node includes both multihoming and mobile IP functions, then the node can operate in multiple networks and move between networks, but the system complexity increases making it difficult to coordinate address selection with mobility conditions

Engineering Contradiction:
Improvemobility and multihoming functionalityVSAvoidsystem complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent combines the mobility condition determination function with the existing mobility management and multihoming control units. By integrating these functions into a coordinated system where the mobility condition determination unit receives input from mobility management and provides output to multihoming control, the system manages complexity through functional integration rather than separate independent units.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The mobility condition determination unit serves multiple functions: it receives mobility conditions, determines address selection conditions based on those conditions, and provides guidance to the multihoming control unit. This multi-functional approach consolidates several operations into a single unit, managing system complexity while maintaining comprehensive control over address selection in mobile multihomed scenarios.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Data Source

PatentUS8050217B2Communication node and communication control method
Publication Date: 2011.11.01 REDWOOD TECHNOLOGIES LLC
  • US8050217B2 patent drawing
  • US8050217B2 patent drawing
  • US8050217B2 patent drawing

AI summary

A mobility condition determination unit, provided in an MIP controller that manages moving of a communication node, obtains and examines various conditions that have occurred as the communication node is moving, selects an appropriate HoA (e.g., the home address of an MN1) for the current connection situation, and transmits, to a multihoming controller, a notification indicating that a set of the selected HoA and a CoA constitutes appropriate addresses to be used. Upon receiving the notification from the mobility condition determination unit, the multihoming controller transmits, to the MIP controller, an address (Addr2) consonant with the received HoA, and the MIP controller performs packet communication using the HoA or the CoA consonant with the address.