Bus network

About: Bus network is a research topic. Over the lifetime, 7017 publications have been published within this topic receiving 97556 citations.

Apparatus and method for dedicated interconnection over a shared external bus

Abstract: Apparatus and methods to control an external bus. In one embodiment, an apparatus includes an external bus port and an external bus controller. The external bus controller can include a first register interface to receive a first set of data and a second register interface to receive a second set of data. The external bus controller can send the first set of data and the second set of data to said external bus port.

Sub-bus activity detection technique for power management within a computer system

Abstract: The computer system includes an integrated processor coupled to a power management unit and at least one peripheral device. The integrated processor includes a bus interface unit that provides an interface to a high performance peripheral interconnect bus with multiplexed address/data lines. The peripheral interconnect bus, which may be a PCI standard bus, accommodates data transfers between an internal bus of the integrated processor and PCI peripheral devices. The integrated processor further includes a sub-bus control unit that generates a set of side-band control signals that allow the external derivation of a lower performance secondary bus, such as an ISA bus, without requiring a complete set of external pins for the secondary bus on the integrated processor. The derivation of the secondary bus is accomplished with an external data buffer and an external address latch which are controlled by the side-band control signals. Separate address and data lines from the integrated processor for the secondary bus are not required. Accordingly, high performance peripheral devices are supported by the integrated processor as well as lower performance, lower-cost peripherals without a significant increase in the pin-count of the integrated processor.

Anomaly detection for vehicular networks for intrusion and malfunction detection

Abstract: A security monitoring system for a Controller Area Network (CAN) comprises an Electronic Control Unit (ECU) operatively connected to the CAN bus. The ECU is programmed to classify a message read from the CAN bus as either normal or anomalous using an SVM-based classifier with a Radial Basis Function (RBF) kernel. The classifying includes computing a hyperplane curvature parameter γ of the RBF kernel as γ=ƒ(D) where ƒ( ) denotes a function and D denotes CAN bus message density as a function of time. In some such embodiments γ=ƒ(Var(D)) where Var(D) denotes the variance of the CAN bus message density as a function of time. The security monitoring system may be installed in a vehicle (e.g. automobile, truck, watercraft, aircraft) including a vehicle CAN bus, with the ECU operatively connected to the vehicle CAN bus to read messages communicated on the CAN bus. By not relying on any proprietary knowledge of arbitration IDs from manufacturers through their dbc files, this anomaly detector truly functions as a zero knowledge detector.

Circuit for providing automatic SCSI bus termination

Abstract: Disclosed are a circuit and method for providing automatic termination for a small computer systems interface ("SCSI") bus. The circuit resides within a bus controller comprising (1) a control circuit for controlling transmission of data on a bus and for providing an interface between the bus and a computer system for communication of the data therebetween and (2) a first bus port and a second bus port, each of the first and second bus ports permitting a device to be coupled thereto for communication with the control circuit via the bus, the bus controller being at an end of the bus when a single one of the first and second bus ports is coupled to a device and being in a middle of the bus when both the first and second bus ports are coupled to devices. The circuit of the present invention is coupled to the first and second bus ports and is capable of coupling a terminating circuit to the bus as a function of a presence of devices coupled to the first and second bus ports, the bus requiring coupling of the terminating circuit when the bus controller is at the end of the bus.