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Method for reducing data rate during transmission of object-related data between two computer elements communicating within time limits

  • US 6,438,581 B1
  • Filed: 01/18/2000
  • Issued: 08/20/2002
  • Est. Priority Date: 05/18/1998
  • Status: Expired due to Fees
First Claim
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1. Process for reducing a required data throughput in transmission of at least partially time variable information which characterizes an object or process, by means of a protocol between communication modules which communicate with one another under time control by way of a data transmission device, each communication module being coupled to at least one external unit for providing and utilizing transmitted data, and each communication module being connected with a timer, said process comprising:

  • a sending communication module in a sending user area performs a first time-related extrapolation of data to be sent, using a predetermined algorithm and taking into account a transmission time, said data to be sent comprising current actual data provided by an external unit coupled to said sending communications module;

    said sending communication module compares said current actual data currently provided by said external unit with temporally corresponding extrapolated data, and determines a comparison value based thereon;

    said sending communication module transmits said current actual data to a receiving communication module in a receiving user area when said comparison value reaches or exceeds a desired quantity;

    said receiving communication module, performs a second time-related extrapolation of data received from the sending communication module, said second time related extrapolation corresponding to said first time-related extrapolation performed by the sending communication module, and using the same predetermined algorithm; and

    said receiving communication module provides extrapolated data for use by an external unit coupled thereto until the receiving communication module has received further current actual data;

    wherein in extrapolation of the received data, the receiving communication module takes into account a time delay due to transmission time required for transmission of data from the sending to the receiving communication module;

    the extrapolation is specific for at least one time-variable object or process characterized by the data;

    the data are defined in the form of data sets which reflect characteristics of the object or process to be characterized, which characteristics can be extrapolated;

    the desired quantity used for the comparison between the current actual and the extrapolated data can be set during the process, based on a data quantity to be sent for a particular point in time relative to an available data transmission bandwidth;

    for defining a sequence in which data are sent in the form of data sets, a continuously updated list of priorities is provided which comprises an arrangement of references to data sets; and

    the sequence is determined by a weighting the significance of respective data sets in terms of functionality of the external unit at least of the sending user area, and by a time duration within which a particular data set has no longer been sent until updating of the list of priorities.

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