Central bus guardian (CBG) and method for operating CBG

摘要

Central bus guardians (CBGs) and methods for operating a CBG are described. In one embodiment, a method for operating a CBG includes performing race arbitration among the buses connected to the CBG to select a winner bus for a time slot, and selectively forwarding data received at the CBG from the winner bus to a destination bus in the time slot based on whether the winner bus or the destination bus has a connection to an external network with respect to the application network and whether a communications device connected to the winner bus or the destination bus performs a critical function. Other embodiments are also described.

主权项

1. A method for operating a central bus guardian (CBG), the CBG being connected to buses in an application network, the method comprising:
performing race arbitration among the buses connected to the CBG to select a winner bus for a time slot; and selectively forwarding data received at the CBG from the winner bus to a destination bus in the time slot based on whether the winner bus or the destination bus has a connection to an external network with respect to the application network and whether a communications device connected to the winner bus or the destination bus performs a critical function, wherein the selectively forwarding includes forwarding the data from the winner bus to the destination bus in the time slot if each communications device connected to the winner bus only performs a non-critical function.