Wireless Channel Selection and Bandwidth Reservation

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Solution Overview

Problem

Infrastructure mode wireless networking fails to enable communication between devices outside the transmission coverage range of the coordinator, leading to failed discovery mechanisms when devices cannot receive beacons.

Innovation Solution

A method and system for wireless communication that involves channel selection and bandwidth reservation, where devices communicate channel occupation information to select a data channel and reserve bandwidth for new transmissions, avoiding interference with ongoing transmissions by detecting and scheduling non-interfering time slots.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If infrastructure mode wireless networking is used with a coordinator, then centralized control and management is achieved, but devices outside the coordinator's transmission coverage range cannot communicate

Engineering Contradiction:

Improvecentralized controlVSAvoidcommunication coverage

Core Design Contradiction:

Ease of operationVSAdaptability or versatility

Solution Approach 1:

The network is segmented into infrastructure mode (coordinator-controlled) and ad-hoc mode (device-to-device) operations. Devices can switch between these modes based on whether they are within coordinator range, allowing both centralized control where applicable and direct communication where needed.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces a hybrid mode that acts as an intermediary between pure infrastructure and pure ad-hoc modes. Devices within coordinator range use infrastructure mode, while devices outside range form ad-hoc networks, and the system manages the transition between these states.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Loss of information

If all devices periodically receive beacons from the coordinator, then channel occupation information is indicated, but devices outside transmission coverage cannot receive beacons

Engineering Contradiction:

Improvechannel occupation informationVSAvoiddiscovery mechanism

Core Design Contradiction:

Loss of informationVSAdaptability or versatility

Solution Approach 1:

Devices outside coordinator range perform self-service by exchanging channel occupation information directly with each other through ad-hoc communication, rather than relying on the coordinator's beacons. Each device maintains its own knowledge of channel usage in the absence of coordinator signals.

Inventive Principle:

Principle #25Self-service

3Reliability

If bandwidth is reserved for new transmissions on a data channel, then interference with ongoing transmissions is avoided, but channel time must be carefully scheduled

Engineering Contradiction:

Improveinterference avoidanceVSAvoidchannel time scheduling

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The system uses feedback mechanisms where devices monitor ongoing transmissions and adjust their bandwidth reservation requests accordingly. Channel occupation information is exchanged and used to determine appropriate transmission schedules, creating a feedback loop that balances reliability with scheduling complexity.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS8699421B2Method and system for wireless communication using channel selection and bandwidth reservation

Publication Date: 2014.04.15 SAMSUNG ELECTRONICS CO LTD

AI summary

A method and system for wireless communication involves communicating via a control channel the channel occupation information with a discovered wireless station, based on the occupation information, selecting a wireless data channel for a new transmission with the discovered station and reserving bandwidth for the new transmission on the data channel simultaneous with one or more ongoing transmissions on the data channel.