Patent ID: 7680144
Filing Date: 2010-03-16
Classification: H04L

Abstract:
1. A method of communicating between first and second serial data busses, each bus comprising one or more nodes coupled via the respective data bus so that simultaneous transmission on the respective bus of a dominant state by at least one of the nodes and a recessive state by the other nodes results in the dominant state being detectable on the respective bus, the method comprising: transmitting onto the first bus transitions from a first state to a second state, wherein the first and second states are complementary states selected from the dominant and recessive states, each of the transitions signaling the start of a bit on the first bus; transmitting the transition onto the second bus synchronously with the transmission of transitions onto the first bus; detecting dominant and recessive states on the first bus at a first predetermined time after each transition and on the second bus at a second predetermined time after each transition, the states representing respective dominant and recessive bits of attempted messages transmitted by nodes of the first and second busses, wherein the first and second predetermined times are less than a standard predetermined time after the transition that nodes of the first and second busses use to respectively detect the state of the first and second busses; and transmitting the dominant state on both the first and second bus after the first and second predetermined times if the dominant state was detected on at least one of the first bus and the second bus at the respective first and second predetermined times.