Medium Access Control in Industrial and Automotive Wireless with Combined Wired and Wireless Sensor Networks

Inactive Publication Date: 2009-12-17
INFINEON TECH AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0019]In accordance with a further exemplary embodiment, a sensor network includes a plurality of gateways configured to communicate over wired and wireless portions of a network, and a wireless node configured to communicate with a gateway of the plurality of gateways. The sensor network further includes a central unit configured to communicate with the plurality of gateways over a wired portion of the network, the central unit configured to receive a plurality of

Problems solved by technology

The growing cost and expanding utilization of copper produced by such arrangements presents an important design issue for the ongoing development of automotive vehicles as well as for industrial manufacturing systems.
The RS-232 serial interface does not easily accommodate daisy chain- or ring-type communication structures, and accordingly requires a substantial amount of wiring to implement a complex or widely dispersed network.
However, communication reliability depends on the physical integrity of the cables which make a fieldbus arrangement prone to mechanical interruptions.
Two major disadvantages of wired networks, especially for automotive applications, are limited flexibility of mounting and deploying sensor devices because of the necessary cable routing.
In addition, increased weight and costs are added to a vehicle by the extensive number and length of cabling and interconnections generally required to couple sensor units with a central unit.
The performance of wireless sensor networks is often limited by contention for time or frequency slots by a large number of simultaneously communicating sensors.
Consequently, contention by multiple sensor nodes for common-use timeslots has been an ongoing problem in wireless sensor networks.
A further disadvantage of the use of a WSN (wireless sensor network) in a harsh industrial or automotive environment is its susceptibility to radio noise and interference, which increases the bit error rate.
However, redundant transmissio

Method used

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  • Medium Access Control in Industrial and Automotive Wireless with Combined Wired and Wireless Sensor Networks
  • Medium Access Control in Industrial and Automotive Wireless with Combined Wired and Wireless Sensor Networks
  • Medium Access Control in Industrial and Automotive Wireless with Combined Wired and Wireless Sensor Networks

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Embodiment Construction

[0034]The making and using of the presently preferred embodiments are discussed in detail below. It should be appreciated, however, that the present invention provides many applicable inventive concepts that can be embodied in a wide variety of specific contexts. The specific embodiments discussed are merely illustrative of specific ways to make and use the invention, and do not limit the scope of the invention.

[0035]The present invention will be described with respect to exemplary embodiments in a specific context, namely a wireless sensor network configured to coordinate medium access for periodic, aperiodic, and event-driven periodic messages to provide contention-free access for selected network nodes. A wireless network in an exemplary embodiment includes a combination of wired and wireless gateways to provide an adaptable hybrid virtual star communication arrangement for network nodes.

[0036]An embodiment of the invention may be applied to various wireless sensor network arrangeme

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Abstract

An embodiment of the invention relates to a local area sensor network including a central unit configured to receive a resource allocation request from a priority network sensor in a reserved timeslot and in response to designate a shared timeslot allocation. The priority network sensor transmits a resource allocation request in a reserved timeslot, and the sensor transmits data in the allocated shared timeslot. A sensor network can be formed with multiple gateways that each communicate over wired and wireless portions of the network. The central unit communicates with the gateways over the wired portion of the network. Wireless nodes communicate wirelessly with the gateways. The central unit receives a plurality of link quality indicators from the gateways for respective wireless paths to the wireless sensors, and selects a gateway for relaying a message from the central unit to a wireless sensor based on the link quality indicators.

Description

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Claims

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Application Information

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Owner INFINEON TECH AG
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