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Systems and methods for multiple-access sensor networks

A technology of sensors and oscillators, applied in the field of wireless data transmission

Active Publication Date: 2018-12-11
ROBERT BOSCH GMBH +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the transmitters often include low cost electronics and unidirectional wireless transmitters that cannot implement known multiple access techniques without requiring costly design changes or degradation in battery life and reliability

Method used

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  • Systems and methods for multiple-access sensor networks
  • Systems and methods for multiple-access sensor networks
  • Systems and methods for multiple-access sensor networks

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Embodiment Construction

[0016] To promote an understanding of the principles of the embodiments disclosed herein, reference is now made to the drawings and description in the following written specification. Reference numbers are not intended to limit the scope of the subject matter. This patent also covers any alterations and modifications to the illustrated embodiments, and further applications of the principles of the disclosed embodiments that would normally occur to one skilled in the art to which this patent pertains.

[0017] As used herein, the terms "multiple-access" and "multiple-access system" refer to methods and systems that include multiple transmitters broadcasting to one or more receivers via a shared communications medium. A common example of a multiple-access system includes two or more wireless transmitters, each broadcasting a signal using a common frequency band or shared communications medium, and each located within range of a common receiver. In a Time Division Multiple Acces...

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Abstract

One method enables a wireless receiver to distinguish between sensor probes that supply data to the receiver over long periods of time. The method includes each probe generating a random number that is sent to the receiver to identify the probe. Each probe and the receiver also use a pseudo-random process to identify each probe's transmission time. The pseudo-random process helps keep the transit times of the detectors separate in the presence of oscillator drift. If a transmission collision occurs, the receiver ignores all probes in the collision and waits until the pseudo-random process separates probe transmissions.

Description

technical field [0001] This patent relates generally to the field of wireless data transmission, and more particularly to systems and methods for enabling a receiver to detect wireless transmissions generated by multiple transmitters. Background technique [0002] Many industries employ remote sensing to provide a single display with information collected from multiple remote locations. One example of a remote sensing system is a moisture sensing system. The moisture sensing system comprises a plurality of moisture sensors placed at different locations in the garden, field or wherever moisture detection is desired. Each moisture sensor is configured to perform one or more moisture measurements, including soil moisture level and humidity measurements. Each moisture sensor further includes a transmitting device, typically a wireless transmitter, for transmitting a signal to a receiving station. The signal emitted from each sensor includes data representative of the tidal me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W74/08
CPCH04W40/08H04W74/0825Y02D30/70H04W88/08
Inventor S·W·雅各布斯K·W·克莱曼哈根R·D·沃特金斯D·G·特拉维斯
Owner ROBERT BOSCH GMBH