Virtual Mobile Server Aggregation for Ad Hoc Network Bandwidth

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Solution Overview

Problem

Wireless communications networks face limitations in bandwidth due to restricted spectrum allocation, leading to reduced bandwidth per subscriber and increased overhead in mobile scenarios, especially for clients in motion, where Doppler effects and transient hotspots exacerbate data rate drops.

Innovation Solution

A wireless mobile device with ad hoc network capabilities, including a Virtual Mobile Server (VMS) that aggregates and translates communication links between mobile clients and fixed stations, enabling non-interfering communication and reducing overhead by bundling sessions across multiple clients, thereby increasing usable bandwidth and enhancing handoff protocols.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If wireless service providers utilize licensed spectrum for broadband wireless services, then wireless communications can be supported, but bandwidth per subscriber is limited due to restricted spectrum allocation

Engineering Contradiction:
Improvebandwidth per subscriberVSAvoidspectrum allocation flexibility
Core Design Contradiction:
Quantity of substanceVSAdaptability or versatility

Solution Approach 1:

The patent combines multiple wireless communication links (first wireless communication link and second wireless communication link) into a unified ad hoc network system. By merging these links and allowing dynamic routing through mobile devices, the system effectively increases the available bandwidth per subscriber beyond what a single licensed spectrum allocation would provide.

Inventive Principle:
Principle #5Merging (Combining)

2Ease of operation

If fixed access devices are used for wireless communications, then clients can communicate wherever they travel, but clients in motion suffer data rate drop due to Doppler effects

Engineering Contradiction:
Improvemobile communication availabilityVSAvoiddata rate stability
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The patent implements a dynamic ad hoc network where mobile devices can freely move and change roles between client and server functions. This dynamic architecture allows the network to adapt to motion-induced Doppler effects by continuously reconfiguring connections, thereby maintaining data rate stability while preserving mobile communication availability.

Inventive Principle:
Principle #15Dynamics

3Reliability

If mobile devices execute handoff protocols with cell stations, then clients can maintain connectivity while moving, but handoff protocols are time-consuming and cause service interruption

Engineering Contradiction:
Improvecontinuous connectivityVSAvoidhandoff execution time
Core Design Contradiction:
ReliabilityVSLoss of time

Solution Approach 1:

The patent enables preliminary establishment of communication paths through the ad hoc network before formal handoff protocols with cell stations are completed. By pre-configuring alternative routing paths through mobile devices, the system reduces the effective handoff time and minimizes service interruption while maintaining continuous connectivity.

Inventive Principle:
Principle #10Preliminary action

4Reliability

If multiple clients communicate with fixed base stations individually, then each client can maintain dedicated connections, but overhead increases and bandwidth efficiency decreases

Engineering Contradiction:
Improvededicated connection qualityVSAvoidnetwork overhead
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent introduces mobile devices as intermediary nodes in the ad hoc network that can aggregate and relay communications between multiple clients and the fixed base station. This intermediary function reduces network overhead by consolidating control signaling and data traffic, while dedicated connection quality is maintained through virtual circuit emulation over the ad hoc paths.

Inventive Principle:
Principle #24Intermediary (Mediator)

Data Source

PatentUS7633908B1Mobile ad hoc network
Publication Date: 2009.12.15 APPLE INC
  • US7633908B1 patent drawing
  • US7633908B1 patent drawing
  • US7633908B1 patent drawing

AI summary

A mobile ad hoc network is formed by selecting at least one client to function as a Virtual Mobile Server (“VMS”) on behalf of other clients: Those other clients subsequently communicate with a cell station via the VMS on an UWB format. Other clients may function as Virtual Distributed Mobile Servers (“VDMSs”) which relay communications between the VMS and clients which are out of direct communication range of the VMS. Further, multiple VMSs may be implemented for a single ad hoc network in order to bundle bandwidth. Clients may also extend the communication range of the VMS to a new cell station in order to enable earlier initiation of cell station handoff.