The described technology relates to a real-time order processing systems such as, for example, an electronic trading application for equities and other tradable investment instruments. An example system relates to reordering messages received at a server over a communication network from distributed clients, in order to, among other things, eliminate or at least substantially reduce the effects of jitter (delay variance) experienced in the network. The reordering of messages may enable the example electronic trading system to improve the consistency of executing orders (e.g., performing transactions for buying/selling electronic inventories) in the time order of when the client's order entered the trading system's network.

Systems and methods of compensating for the delay asymmetry of coherent optical modems in a packet optical network include measuring fill levels of one or more queues each including an elastic First-In-First-Out (FIFO) circuit used in a transport mapping scheme, wherein the transport mapping scheme is one or more of client mapping to Optical Transport Unit (OTU) and OTU mapping to Flexible OTN (FlexO); and performing adjustments in a clock based in part on the measured fill levels, wherein the adjustments are configured to reduce a Time Error (TE) in the packet network based on delay asymmetry between two nodes.

An electronic communication network comprises a server platform and client data processing devices. Each client data processing device is configured to submit electronic messages to the server platform, provided with a timestamp. The server platform is configured to process incoming electronic messages strictly in a sequence corresponding to the timestamp. The electronic communication network comprising at least one switch, wherein the switch is arranged to receive electronic messages from a plurality of the client data processing devices. the switch comprises a buffer and is configured to store the electronic messages produced by the client data processing devices in the buffer, and to transfer the electronic messages in a manner sorted according to the timestamp provided to each electronic message by the time generator of the client data processing device submitting the electronic message, so that the electronic message with the oldest time is transferred first.

In one embodiment, the disclosure includes a network node synchronization system. The system may include a first node. The first node may include a first host card comprising a first (TOD) time of day counter, a first digital signal processor (DSP) comprising a first DSP counter; and a first optical communication device comprising a first DSP communication channel, wherein the first DSP communication channel transports DSP frames. In various embodiments, the DSP is a coherent DSP.

A method for timestamping and synchronization with high-accuracy timestamps in low-power sensor systems is provided. The method is performed by a device and includes: receiving, by a sensor hub of the device, an interrupt signal from a sensor and performing an interrupt service routine (ISR) to obtain an interrupt timestamp obtained by a latch, wherein the interrupt timestamp is obtained from an always-running unified time reference; obtaining, by the sensor hub, sensor data from the sensor; predicting, by the sensor hub, a prediction timestamp based on an amount of sensor data and the interrupt timestamp by using a filtering algorithm; and correcting, by the sensor hub, a timestamp of each sensor data based on the prediction timestamp.

Techniques are provided for informing a network of a timing source outage in a node and reestablishing a synchronized time in the node. An example method for providing a timing source outage notification includes detecting an outage of a timing source, determining one or more impacted nodes, generating one or more notification messages based at least in part on a communication context for each of the one or more impacted nodes, and transmitting the one or more notification messages.

An electronic communication network comprises a server platform and client data processing devices. Each client data processing device is configured to submit electronic messages to the server platform, provided with a timestamp. The server platform is configured to process incoming electronic messages strictly in a sequence corresponding to the timestamp. The electronic communication network comprising at least one switch, wherein the switch is arranged to receive electronic messages from a plurality of the client data processing devices. the switch comprises a buffer and is configured to store the electronic messages produced by the client data processing devices in the buffer, and to transfer the electronic messages in a manner sorted according to the timestamp provided to each electronic message by the time generator of the client data processing device submitting the electronic message, so that the electronic message with the oldest time is transferred first.

The present disclosure provides systems and methods for proving an event. The system comprises a network of one or more beacon nodes and each beacon node is configured to: receive a request over the network for proving a time and location for an event, and the request comprises event data generated by a requesting entity; create a timestamp for the event using a clock of the beacon node, wherein the clock is synchronized to a trusted time source; generate a hash code for the timestamp and the event data and record the hash code to a ledger at the beacon node.

In certain embodiments, a communication network has a specialized ingress node that converts one or more incoming flows into a single, packetized, time-division multiplexed (TDM) flow; a switch fabric that routes the TDM flow via a fixed path through the switch fabric in a contention-free manner; and a specialized egress node that converts the TDM flow received from the switch fabric into one or more outgoing flows corresponding to the one or more incoming flows. The technology turns legacy, best-effort packet-switching into deterministic circuit-switching for a programmable selection of flows with minimal impact on network dynamics and at relatively low cost.

An example method includes receiving a message from a sending service and addressed to a destination service. The message is sent to the destination service using a synchronous message modality responsive to a communication history parameter for the destination service indicating a synchronous message type. The message is sent to the destination service using an asynchronous message modality responsive to the communication history parameter indicating an asynchronous message type. A reply is received from the destination service and the reply is sent to the sending service. The synchronous message modality comprises waiting for a reply to be received from the destination service for a predetermined time interval. The asynchronous message modality comprises storing identification data associated with the message in a correlation data store, receiving the reply from the destination service, and determining whether the reply is associated with the message based on the identification data.