Embodiments of this application provide a signal frame processing method and a related device. A sink node performs delay compensation on a received service, so that delay variation generated in a transmission process of the service can be effectively eliminated. The method in embodiments of this application includes the following steps. First, the sink node receives a signal frame. A payload area of the signal frame is used to bear a target service, and an overhead area of the signal frame includes a node quantity field. Then, the sink node determines, based on the node quantity field, a quantity of nodes through which the target service passes during transmission. Further, the sink node performs delay compensation on the target service based on the quantity of nodes.

Provided are techniques, devices and systems that enable updating of a reportable parameter table database when a reconfigured optical communication path is formed by switching performed by a branching unit in an undersea optical communication transmission system. A processor may obtain system attributes of each respective segment of a number of segments of the reconfigured optical communication path from a first end point to a second endpoint. The system attributes of each respective segment of the number of segments may be evaluated from the first end point to the second endpoint of the reconfigured optical communication path. A reportable parameter table may be generated based on the evaluated system attributes that includes a listing of operational and structural parameters of system from the first endpoint to the second endpoint of the reconfigured optical communication path.

A route calculation method, device, and system. The route calculation method includes: receiving, by a first device, a service request message, where the service request message is used to request the first device to determine a transmission path of a borne service requested by the service request message to be established; and determining, by the first device, a transmission path of the service based on the service request message and first bearing capability information, where the first bearing capability information is used to indicate an actual bearing capability of each link on the transmission path. According to the foregoing solution, the system can calculate a route and configure the service based on an actual service bearing capability of each link of a network.

The present disclosure discloses example method and apparatus for switching a line bandwidth of an optical transport network. One example method includes a network device switching an optical transport network (OTN) frame from a first bandwidth to a second bandwidth at a granularity of a substructure to generate a first OTN frame with the second bandwidth, where a bandwidth of the substructure is a specified value, and a difference between the first bandwidth and the second bandwidth is a multiple of the specified value. The first OTN frame with the second bandwidth is encapsulated as an encapsulated frame with the second bandwidth according to a first encapsulation protocol. The encapsulated frame with the second bandwidth is transmitted at an optical layer.

A reduced-complexity optical packet switch which can provide a deterministic guaranteed rate of service to individual traffic flows is described. The switch contains N input ports, M output ports and N*M Virtual Output Queues (VOQs). Packets are associated with a flow f, which arrive an input port and depart on an output port, according to a predetermined routing for the flow. These packets are buffered in a VOQ. The switch can be configured to store several deterministic periodic schedules, which can be managed by an SDN control-plane. A scheduling frame is defined as a set of F consecutive time-slots, where data can be transmitted over connections between input ports and output ports in each time-slot. Each input port can be assigned a first deterministic periodic transmission schedule, which determines which VOQ is selected to transmit, for every time-slot in the scheduling frame. Each input port can be assigned a second deterministic periodic schedule, which determines which traffic flow within a VOQ is selected to transmit. Each input port can be assigned a third deterministic periodic schedule, which specifies to which VOQ an arriving packet (if any) is destined, for each time-slot in a scheduling frame. Each input port can be assigned a fourth deterministic periodic schedule, which specifies to which Flow-VOQ within a VOQ an arriving packet (if any) is destined. In this manner, each traffic flow can receive a deterministic guaranteed-rate of transmission through the switch.

Comprises aggregating data received by a first number of server ports of an edge switch. The server ports operate at a first data speed. The aggregated data is distributed into a plurality of virtual lanes with each virtual lane carrying a portion of the aggregated data at a second data speed less than the first data speed.

Embodiments of this application provide a service protection method, including: A first node determines that a fault occurs on a first working path; the first node generates a bandwidth activation message based on the fault, where the bandwidth activation message indicates a third node to adjust a bandwidth of a service from a protection bandwidth to a target bandwidth, the protection bandwidth represents a pre-occupied bandwidth of a first protection path before transmission of the service, and the target bandwidth represents an actual occupied bandwidth for transmission of the service; and the first node sends the bandwidth activation message on the first protection path.

Connectors for a networking device may be provided. A networking device may comprise a first plurality of switch bars each comprising a first switch type arranged parallel to one another, a second plurality of switch bars each comprising a second switch type arranged parallel to one another, and a third plurality of switch bars each comprising a third switch type arranged parallel to one another. The first plurality of switch bars, the second plurality of switch bars, and the third plurality of switch bars may be arranged orthogonally. A first one of the first plurality of switch bars may be connected to a first one of the second plurality of switch bars via a retractable mechanical connector mechanism.

An optical device may include a communication interface and processing logic configured to receive a broadcast contention-based allocation from an optical line terminal (OLT), wherein the contention-based allocation is associated with activation of the optical device in an optical network. The processing logic may also be configured to transmit a message in response to the contention-based allocation, wherein the message includes information identifying the optical device and receive, from the OLT, an assignment message or a feedback message in response to the transmitted message. The processing logic may be further configured to execute a retransmission procedure based on the assignment or feedback message indicating that a collision occurred.

An example optical switch includes a plurality of input ports and a plurality of output ports, a cross-connect fabric having one or more inputs, one or more outputs, and a device to selectively cross-connect the inputs with the outputs. The optical switch includes an integrated fast optical switch comprising a first input, a first output, and a second output, wherein the first input is connected to a first one of the outputs of the cross-connect fabric, and wherein the integrated fast optical switch has a switching time that is less than a switching time of the cross-connect fabric to switch the first input between the first output on a path to a first output port of the plurality of output ports and the second output on a path to a second output port of the plurality of output ports.