Medical devices can perform a plurality of functions, such as sensing, monitoring, deriving and/or calculating various physiological statuses of a patient (e.g., blood pressure, temperature, respiration rate, etc.). Medical devices can also be used to image part or all of a patient's body, to deliver a treatment, or to manage information related to a patient's care. The present disclosure is directed at one or more devices that perform these functions using a plurality of processing circuits, wherein each processing circuit has a timing circuit with a local clock. These processing circuits can be connected via a network, and each timing circuit can communicate with at least one other timing circuit in order to detect and correct time-differences between their local clocks. In this way, multiple processing circuits can be synchronized with each other to facilitate diagnosis or treatment of a patient's condition, or other aspects of a patient's care.

The validity of sensor data of an Ethernet onboard network in a motor vehicle is checked by: determining a delay time of a first signal on a first connecting path between a first control unit of the Ethernet onboard network and a second control unit of the Ethernet onboard network; determining a maximum speed of the first connecting path on the basis of the delay time; and determining a type of a transmission medium of the first connecting path on the basis of the maximum speed. The following steps are also carried out: identifying at least a first control unit of the Ethernet onboard network, synchronizing at least a first control unit of the Ethernet onboard network, ascertaining the synchronization interval, ascertaining a drift of a timer of the first control unit, ascertaining a timestamp of the first control unit, reading a timestamp of the first control unit.

A method performed by a network entity is provided. The method comprises obtaining information indicating uplink, UL, and downlink, DL, time periods in the packet-based fronthaul network occupied by Time-Division Duplex, TDD, radio transmissions transmitted and/or received by the one or more second fronthaul network units over its radio interface. The method further comprises scheduling packet-based synchronization messages between at least the one or more first fronthaul network units and the one or more second fronthaul network units over the packet-based fronthaul network based on the obtained information. A network entity is also provided, as well as, computer programs and carriers.

Systems including at least one processor and a memory storing instructions that, when executed by the at least one processor, result in the system collecting real-time telemetry measurements for packets received at each hop of an overlay network, and the system injecting the measurements into a variable-length trailers of the packets.

A packet processing method includes receiving a first packet by a first receiving interface of a media conversion module of a first network device, where the first packet includes a first alignment marker (AM), sending a second packet by a first sending interface of the media conversion module, where the second packet includes the first AM, and where the second packet is the first packet processed by the media conversion module, and calculating a time interval T.sub.1 between a time at which the media conversion module receives the first packet and a time at which the media conversion module sends the second packet, where the T.sub.1 is used to compensate for a first timestamp at which the first network device receives or sends the third packet.

The present disclosure provides a method, system, and apparatus for processing parking and a vehicle controller, and relates to the field of intelligent transportation technology, specifically to the field of automated parking technology. The method is executed by a parking system deployed on a vehicle controller, the parking system including a perception module and other modules except the perception module; the perception module being deployed on a first operating system in the vehicle controller; and the other modules being deployed on a second operating system in the vehicle controller; the method includes: processing an image collected by an image collector through the perception module to obtain perception result data; and controlling a vehicle based on the perception result data obtained from the perception module by the other modules.

A network device includes one or more ports for connecting to a communication network, packet processing circuitry and clock circuitry. The packet processing circuitry is configured to communicate packets over the communication network via the ports. The clock circuitry includes a hardware clock configured to indicate a network time used for synchronizing network devices in the communication network, and a built-in accuracy test circuit configured to check an accuracy of the hardware clock.

This switch device includes: a relay unit configured to perform a first relay process of relaying data between function units installed in a vehicle and belonging to different VLANs; a calculation unit configured to calculate time correction information on the basis of a transmission time of data from a first function unit serving as the function unit to the switch device, a reception time in the switch device of the data transmitted from the first function unit, a transmission time of data from a second function unit serving as the function unit to the switch device, and a reception time in the switch device of the data transmitted from the second function unit; and a notification unit configured to notify the second function unit of the time correction information calculated by the calculation unit.

Embodiments of this application provide a time synchronization offset adjustment method and apparatus, a terminal, and an access layer device. The method includes: compensating, on a 1588 terminal or an access layer device based on a 1588 time offset value, for a 1588 time obtained through synchronization. This reduces an error caused by asymmetric delays on transmit and receive links, and improves precision of the 1588 time obtained through synchronization.

The invention relates, inter alia, to a network device (10) which can be connected via electrical lines (15, 16) to other subscribers (18a, 18b, 12, 13) of a network (42), in particular a real-time intercom network (42), for transmitting audio and/or image information, wherein the network device (10) comprises at least one input-side terminal (22a) for connection to a power supply source (11) and at least one output-side terminal (22b) for connection to at least one second network device (12), wherein signals and operating voltage (PoE) can be transmitted via the terminals, using at least the following four layers (32, 33, 34, 35): a) PTP layer (precision time protocol), b) ethernet layer, c) data and/or information layer, d) PoE (power over ethernet) layer.