Method and system for providing control accesses between a device on a non-proprietary bus and a device on a proprietary bus
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United States of America Patent
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-
Apr 15, 2003
Grant Date -
N/A
app pub date -
Nov 22, 1999
filing date -
Nov 22, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method for providing control accesses between a device on a non-proprietary bus and a device on a proprietary bus is disclosed. A gateway controller is connected between a proprietary bus and a non-proprietary bus. A message originated from a device on the non-proprietary bus intended for a device on the proprietary bus is checked by the gateway controller to determine if a transmission of the message should be permitted according to a permitted message bitmap. The permitted message bitmap contains a list of devices on the non-proprietary bus that are previously registered as able to communicate with devices on the proprietary bus and a list of permitted messages associated with each of the devices on the non-proprietary bus. The transmission of the message to the device on the proprietary bus is denied if the message is not registered within the permitted message bitmap.
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