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Data communication method for a set of hard-real time applications within a network

Inactive Publication Date: 2009-06-11
EDGEWATER COMP SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0010]Advantageously, the invention provides a robust and efficient communication method for hard real-time and non-hard real-time applications over a network.

Problems solved by technology

The messages are generally highly repetitive, and their content and periodicity are all pre-planned.
The data capacity of 1 Mbps also comes with an associated bit error rate.
This modulation scheme is bandwidth inefficient with most of its signal energy concentrated around 1 MHz.
MIL-STD-1553b has little remaining capacity for existing applications and leaves little opportunity to enable additional communication capabilities.

Method used

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  • Data communication method for a set of hard-real time applications within a network
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  • Data communication method for a set of hard-real time applications within a network

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Embodiment Construction

[0015]In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the invention. However, it will be understood by those skilled in the art that the present invention may be practiced without these specific details. In other instances, well-known methods, procedures, components and circuits have not been described in detail so as not to obscure the present invention.

[0016]FIG. 1 illustrates a flow chart of a data communication method 100 for a given set of hard-real time applications, within a network, according to an embodiment of the invention. The hard-real time applications have an associated set of predefined network requirements (PNRs) guaranteeing the applications are supported by the data network under any network operating conditions. To arrive at a set of PNR's, required maximum packet error rates and minimum data rates are first specified for each link direction within the network, for each hard real-time ...

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Abstract

A data communication method for a set of hard real-time applications with an associated set of predefined network requirements (PNR) is provided. The method comprises configuring the physical layer of the network with a set of static modulation parameters (SMPs) to guarantee the PNRs are met at worst-case operating conditions for the network. The method further comprises measuring the current network performance within the network based on a given network performance monitoring schedule and, whenever the current network performance exceeds the PNRs by predefined amounts, adjusting the physical layer of the network by selecting a set of dynamic modulation parameters (DMP's) to increase the bandwidth availability within the network. Advantageously, the invention further allows for the allocation of the excess bandwidth to a set of non-hard real-time applications, whenever the current network performance exceeds the PNR.

Description

BACKGROUND OF THE INVENTION[0001]A hard real-time application within a data network is a type of data communication in which a message is transmitted and successfully received over the network prior to a certain known deadline and with sufficient degree of certainty. An example of this would be control of a wing flap over an avionics bus. Thus, a minimum data rate and a maximum packet error rate must be guaranteed, under all operating conditions of the network. For multiple hard real-time applications, aggregate minimum data rate and maximum packet error rate requirements guaranteeing performance of the applications under all operating conditions can be defined. The set of these aggregate rates for a given set of hard real-time applications will be referred herein as the associated set of predefined network requirements (PNRs).[0002]Similarly, a non-hard real-time application refers to a data communication process where there is no real-time constraint or deadline.[0003]Current netw...

Claims

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Application Information

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IPC IPC(8): G06F15/16H04L47/762
CPCH04L41/0896H04L43/0823H04L47/762H04L43/16H04L67/322H04L69/323H04L47/822H04L67/61
Inventor FANSON, JOHN
Owner EDGEWATER COMP SYST
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