The present disclosure relates to the prioritization of devices taking part in a multi-user random access wireless communication. Based on some known conditions, devices that comply with the conditions are given preferential treatment during the random access period. The preferential treatment may refer to the eligible devices being allowed to access more resource units during the random access, or it may also mean faster access to the medium during the random access. By taking advantage of the methods described in the present disclosure, it is possible to assign higher priority to selected frame types and/or device categories in a multi-user random access wireless communication system.

The present disclosure discloses a CANopen-based data transmission gateway changeover method, system and apparatus. The method includes: making an active gateway go alive, and mutually monitoring heartbeat packet status together with a standby gateway over an active-standby gateway communications network; keeping the active gateway alive and recording a breakdown of the standby gateway if no heartbeat packet of the standby gateway is detected within a preset heartbeat period and a heartbeat packet of the active gateway is successfully transmitted on the active-standby gateway communications network; requesting, by the active gateway over any in-vehicle communications network, the standby gateway to go alive if the heartbeat packet of the active gateway fails to be transmitted on the active-standby gateway communications network; stopping requesting, by the active gateway if no response is received from the standby gateway, the standby gateway in a first in-vehicle communications network to go alive, and requesting, over another in-vehicle communications network, the standby gateway to go alive; and keeping the active gateway alive and recording a breakdown of the standby gateway if still no response is received from the standby gateway. In this way, sound operation of an entire train is ensured and redundancy effects of a train network are improved.

A ring-based switch has nodes with a link management logic having forward and reverse link outputs couplable to other nodes, forward and reverse link inputs adapted couplable to other nodes, and memory coupled to the link management logic. The link management logic has a first mode where packet bursts are received through the forward link input and transmitted on its forward link output. The link management logic has a second mode where packet bursts are received through the forward link input and transmitted on its reverse link output; and a third mode where packet bursts are received through the reverse link input and transmitted on its forward link output. The node transmits test packets over the forward link output and, if no acknowledgment is received over the reverse link input within a predetermined test-time interval, the link management logic configures in the second mode.

A method comprising: accessing a response mapping defining a set of safety-critical functions associated with a safety-critical latency threshold and a set of safety responses, each safety response corresponding to a safety-critical function; executing a time-synchronization protocol with a transmitting system to calculate a clock reference; accessing a safety message schedule indicating an expected arrival time for each safety message in a series of safety messages based on the clock reference; for each safety message in the series of safety messages, calculating a latency of the safety message based on an arrival time of the safety message and the expected arrival time; and in response to a latency of a current safety message in the series of safety messages exceeding the safety-critical latency threshold, initiating the safety response corresponding to the safety-critical function for each safety-critical function in the set of safety-critical functions.

The present disclosure relates to the prioritization of devices taking part in a multi-user random access wireless communication. Based on some known conditions, devices that comply with the conditions are given preferential treatment during the random access period. The preferential treatment may refer to the eligible devices being allowed to access more resource units during the random access, or it may also mean faster access to the medium during the random access. By taking advantage of the methods described in the present disclosure, it is possible to assign higher priority to selected frame types and/or device categories in a multi-user random access wireless communication system.

A method for by an asset tracking system is provided. An example method includes receiving a first plurality of data messages from an asset coupled to the asset tracking system and attempting to identify an asset type fingerprint based on the first plurality of messages. In response to failing to identify an asset type fingerprint based on the first plurality of messages, the example method further includes requesting a determined asset type fingerprint for the asset from an asset data analysis system, providing access to the first plurality of data messages to the asset data analysis system, receiving the determined asset type fingerprint for the asset from the asset data analysis system, and obtaining asset information from the asset by decoding a second plurality of data messages received from the asset in accordance with a set of signal definitions linked to the determined asset type fingerprint.

In one embodiment, a system includes a peripheral device including a memory access interface to receive from a host device headers of packets, while corresponding payloads of the packets are stored in a host memory of the host device, and descriptors being indicative of respective locations in the host memory at which the corresponding payloads are stored, a data processing unit memory to store the received headers and the descriptors without the payloads of the packets, and a data processing unit to process the received headers, wherein the peripheral device is configured, upon completion of the processing of the received headers by the data processing unit, to fetch the payloads of the packets over the memory access interface from the respective locations in the host memory responsively to respective ones of the descriptors, and packet processing circuitry to receive the headers and payloads of the packets, and process the packets.

The present disclosure is directed to systems and methods directed to improving the functions of a vehicle. Systems and methods are provided that provide a custom tool that autogenerates a set of software agents that allows a system to separate processing, transmission and receiving of messages to achieve better synchronization. The disclosure herein also provides a simplified method of key provisioning by designating one client as a server and assigning a symmetric key to every other client permanently provisioned between that client and the server. Systems and method are further provided that predict faults in a vehicle. Systems and methods are also provided that preserve data in the event of a system crash. Systems and methods are also provided in which an operating system of a vehicle detects the presence of a new peripheral and pulls the related interface file for that new peripheral. Further, a data synchronization solution is provided herein which provides optimized levels of synchronization.

Systems and methods for a controller area network braided ring are provided. In certain embodiments, a node within a controller area network braided ring includes a controller area network (CAN) controller that transmits and receives CAN messages according to CAN protocol. The node also includes braided ring availability integrity network (BRAIN) circuitry coupled to the CAN controller, wherein the BRAIN circuitry alters the received CAN messages from the CAN controller for transmission to other nodes within a BRAIN network and alters BRAIN messages received from the other nodes into CAN messages for processing by the CAN controller.

A computer-implemented method for processing data, which are associated with at least one message received via a communications system, such as a bus system. The method includes: determining a first variable, which characterizes a transmitting time of the at least one message; evaluating the first variable with regard to at least one time frame of possible transmitting times of the at least one message.