Abstract: A system and method of mitigating impedance mismatches in high-speed electronic systems. The method includes forming a conductive region having a geometry that varies along a longitudinal direction to create a taper. The method includes configuring the taper to produce a spatially varying characteristic impedance along the conductive region. The method includes coupling a first electronic component to a first edge located at one end of the conductive region. The method includes coupling a second electronic component to a second edge located at an opposite end of the conductive region. The method includes transitioning the characteristic impedance from a first impedance at the first edge to a second impedance at the second edge to reduce an impedance mismatch between the first electronic component and the second electronic component.

Abstract: An integrated circuit (IC) device comprises a package substrate with traces configured to electrically connect with a plurality of IC device connection mechanisms. An IC die is mounted on the package substrate. The IC die includes pads. Wires electrically connect the pads of the IC die to the traces of the package substrate, including a first wire that electrically connects a first pad of the IC die to the first trace of the package substrate. A first metallic structure of the package substrate is electrically connected to the first trace and is configured to mitigate adverse effects of an inductance of the first wire.

Abstract: A communication system for use in a vehicle includes a first communication device configured for operation in the vehicle, and a second communication device configured for operation in the vehicle. A cable assembly communicatively couples the first communication device with the second communication device. A signal suppressing device is coupled to the cable assembly at a location proximate to an end of the cable assembly. The signal suppressing device is configured to suppress signals in a frequency range corresponding to in-band radiated emission (RE).

Abstract: A system and method of improving electromagnetic compatibility robustness of die-to-die interconnects within MDMs operating in environments susceptible to EMI. The method includes providing a package substrate. The method includes disposing a first integrated circuit (IC) die on a top side of the package substrate. The method includes disposing a second IC on the top side of the package substrate. The method includes enclosing the first IC die and the second IC die with a molding component. The method includes embedding a communication bus within the package substrate and electrically coupling the communication bus between the first IC die and the second IC die. The method includes configuring the package substrate to attenuate EMI incident upon at least one of the first IC die or the second IC die, to reduce or prevent the EMI from coupling into the communication bus.

Abstract: Multi-Gigabit Ethernet communication over shielded cables have challenging electromagnetic compatibility (EMC) and electromagnetic interference (EMI) problems. Circuitry on-board Ethernet physical layer (PHY) transceivers cannot adequately address these problems. In some cases, some circuitry may pose constraints on the transceiver design, making these problems more difficult to address. To improve EMC and increase tolerance to EMI, an improved shielded cable can be used to connect Ethernet PHY transceivers. In particular, a microwave-absorbing material is added to wrap one or more segments of the shielded cable. The microwave-absorbing material can be applied at or near the cable connectors attached to the ends of the shielded cable. One or more parameters of the microwave-absorbing material can be chosen or optimized for a particular type of shielded cable and sensitivity of the Ethernet PHY transceiver to EMC and EMI problems.

Abstract: A communication system in a vehicle includes a first communication device having a first ground, and a second communication device having a second ground. A shielded cable communicatively connects the first communication device and the second communication device. The shielded cable includes i) a signal wire that is electrically connected to the first communication device and the second communication device, and ii) a shield that is electrically coupled to the first ground and the second ground. A first wire electrically connects the first ground to a chassis of the vehicle at a first point. A second wire electrically connects the second ground to the chassis proximate to the first point to mitigate effects of electromagnetic interference (EMI) on the communication system.

Abstract: An apparatus for controlling an imaging sensor in a vehicle includes an Ethernet transceiver, a sensor interface and a local processor. The Ethernet transceiver is configured to communicate over an in-vehicle Ethernet network with a remote processor. The sensor interface is configured to communicate with the imaging sensor. The local processor that is local to the apparatus and remotely located from the remote processor is configured to receive from the imaging sensor, via the sensor interface, image data and auxiliary data related to the image data, to send at least the image data to the remote processor via the Ethernet transceiver, to generate locally, based on the auxiliary data, and independently from the remote processor, control commands to control an operational aspect of the imaging sensor, and to send the control commands to the imaging sensor via the sensor interface.

Abstract: In a vehicular communication network, an Ethernet network interface receives an Ethernet packet via an Ethernet link and decapsulates an intermediate frame from the Ethernet packet. The intermediate frame includes a first header in an intermediate frame format and a first payload, which includes sensor data, in the intermediate format. The intermediate format is different than any camera serial interface (CSI) protocol of the Mobile Industry Processor Interface (MIPI) Alliance. The Ethernet network interface provides the intermediate frame to a processor. The processor generates a packet in a CSI protocol format defined by the MIPI Alliance. The processor uses header information in the first header of the intermediate frame to populate one or more header fields of a second header of the packet in the CSI protocol format, and uses payload information in the intermediate frame to generate a second payload of the packet in the CSI protocol format.

Abstract: A sensor bridge, for use in an Ethernet network in a vehicle, includes a sensor interface, a mapper and a communication processor. The sensor interface is configured to receive sensor data from a sensor installed in the vehicle. The mapper is configured to form mapped sensor data by applying to the sensor data a direct mapping that maps specified parts of the sensor data to corresponding bit positions in one or more Ethernet packets. The communication processor is configured to generate the one or more Ethernet packets including the mapped sensor data, and to transmit the one or more Ethernet packets over the Ethernet network.

Abstract: Systems and methods are described for a slave PHY device retransmitting a waking up command to a master PHY device in a low-power mode. After transmitting a wake-up command to the master PHY device, the slave PHY device starts a timer. If the timer reaches a threshold time, the slave device retransmits the wake-up command.

Abstract: In a vehicular communication network, a processor receives a packet that includes data corresponding to a sensor, the packet being in a first format. The processor reformats the packet in the first format to a second format different than the first format. The reformatting of the packet includes the processor generating an intermediate frame that includes a header in the second format and a payload in the second format, the payload including the data corresponding to the sensor. The processor provides the frame to an Ethernet network interface, which encapsulates the frame in an Ethernet packet. The Ethernet network interface then transmits the Ethernet packet via an Ethernet link.

Abstract: Systems and methods are described for a slave PHY device retransmitting a waking up command to a master PHY device in a low-power mode. After transmitting a wake-up command to the master PHY device, the slave PHY device starts a timer. If the timer reaches a threshold time, the slave device retransmits the wake-up command.

Abstract: An Ethernet Physical layer (PHY) device includes a PHY interface and PHY circuitry. The PHY interface is configured to connect to a physical link. The PHY circuitry is configured to generate layer-1 frames that carry data for transmission to a peer Ethernet PHY device, to insert among the layer-1 frames one or more management frames that are separate from the layer-1 frames and that are configured to control a General-Purpose Input-Output (GPIO) port associated with the peer Ethernet PHY device, to transmit the layer-1 frames and the inserted management frames, via the PHY interface, to the peer Ethernet PHY device over the physical link, for controlling one or more operations of the GPIO port associated with the peer Ethernet PHY device, and to receive, via the PHY interface, one or more verifications acknowledging that the one or more management frames were received successfully at the peer Ethernet PHY device.

Abstract: An unshielded data connection is disposed on a first surface of a printed circuitry board having a major plane. The unshielded data connection is disposed within an imaginary plane, perpendicular to the surface of the printed circuit board, that includes the unshielded data connection as a line segment within the imaginary plane. A symmetrical arrangement of one or more ground connections is disposed around the unshielded data connection. The arrangement is symmetrical with respect to the imaginary plane.

Abstract: An interface in a communications system includes a physical layer transceiver (PHY) for coupling to a wireline channel medium, and for coupling to a functional device via a single-ended cable. The PHY is an integrated circuit (IC) device having first and second differential input/output (I/O) conductors for coupling to the functional device, an impedance element configured to terminate a first one of the differential I/O conductors to a system ground, a second one of the differential I/O conductors being coupled to the single-ended cable, and a common-mode filter coupled to both of the differential I/O conductors. The PHY may further include a printed circuit board (PCB), with the IC device being mounted on the PCB, the first and second differential I/O conductors being signal traces on the PCB. The single-ended cable may be a coaxial cable.

Abstract: A coordinator communication device in a communication network determines that a time period is to begin during which only the coordinator communication device will have opportunities to transmit. The time period includes a plurality of time cycles, each time cycle i) beginning with the coordinator communication device transmitting a beacon signal and ii) including a transmit opportunity that follows the beacon signal. The transmit opportunity is for the coordinator communication device. The coordinator communication device transmits one or more signals to follower communication devices in the communication network to prompt the follower communication devices to refrain from transmitting during the time period. During one or more transmit opportunities of the time period, the coordinator communication device transmits one or more time-sensitive packets.

Abstract: A first communication device performs a handshaking procedure with a second communication device, the handshaking procedure associated with transitioning from an active mode to a low power mode. The first communication device transmits data and/or idle symbols to the second communication device i) after completion of the handshake procedure, and ii) at least until the earlier of a) a time period expiring, and b) determining that the second communication device quieted a transmitter of the second communication device. The first communication device transitions to the low power mode in connection with the handshaking procedure.

Abstract: An Ethernet Physical Layer (PHY) device includes a link interface and a transceiver. The link interface is configured to connect to a full-duplex wired Ethernet link. The transceiver is configured to receive first Ethernet signals carrying first data at a first data rate over the Ethernet link in a first direction, the first Ethernet signals occupying a first frequency band, and to transmit second Ethernet signals carrying second data at a second data rate different from the first data rate, over the Ethernet link in a second direction that is opposite the first direction, the second Ethernet signals occupying a second frequency band that is different from f the first frequency band.

Abstract: Methods and systems provide for fault diagnosis in a vehicular communication network. The methods and systems utilize a trained neural network model which is downloaded to a local computer associated with the vehicular communication network of a given vehicle and which applies inputs from the given vehicle to output maintenance recommendations for the given vehicle.

Abstract: An Ethernet Physical Layer (PHY) device includes a link interface and a transceiver. The link interface is configured to connect to a full-duplex wired Ethernet link. The transceiver is configured to receive first Ethernet signals carrying first data at a first data rate over the Ethernet link in a first direction, the first Ethernet signals occupying a first frequency band, and to transmit second Ethernet signals carrying second data at a second data rate different from the first data rate, over the Ethernet link in a second direction that is opposite the first direction, the second Ethernet signals occupying a second frequency band that is different from the first frequency band.