Systems and methods of automatically creating and operating a Maintenance End Point (MEP) include, at a slave/reactive network device, receiving an Operations, Administration, and Maintenance (OAM) Protocol Data Unit (PDU) with a destination Media Access Control (MAC) address equal to an interface address of the slave/reactive network device; automatically creating the MEP based on the received OAM PDU and attributes contained in a header of the OAM PDU, wherein the MEP is with a master/active network device; and operating an OAM session with the master/active network device including exchanging Continuity Check Messages (CCMs) with an interval learned from received CCMs from the master/active network device. The systems and methods can further include automatically deleting the MEP responsive to failing to receive any OAM PDUs from the master/active network device during the operating for a predetermined time.

Embodiments of the present disclosure provides a method for service processing in optical transport network including: mapping a client service into a service container; and mapping the service container into a data frame, wherein the data frame includes payload units, each of the payload units consists of unit blocks with fixed length, and the service container is carried in the unit blocks. The embodiments of the present disclosure also provide an apparatus for service processing in optical transport network, an electronic device, and a computer readable medium.

An electromagnetic channel emulator system is disclosed. The system includes an electromagnetic switch matrix sub-system communicatively coupled to one or more systems under test and one or more simulation control layers. The system may include a high performance computing layer including one or more processing element nodes. The electromagnetic switch matrix sub-system may include one or more electromagnetic systems under test input/output layers and one or more high performance computing input/output layers. The one or more input/output layers may include one or more signal converters. The electromagnetic switch matrix sub-system may include one or more switches communicatively coupled to the one or more input/output layers and the high performance computing layer. The one or more switches may be configured to selectively position the one or more analog signals based on the received one or more simulation control layer signals.

A wavelength cross-connect device (20A) performs relay processing, the relay processing being such that wavelength multiplexed signal lights (1a to 1m), which are multiband transmitted from a plurality of routes M(1), are demultiplexed into different wavelength bands (S band, C band, and L band), and for each route, respective optical signals of the different wavelength bands (S band, C band, and L band) are amplified, then subject to rout change by WSSs and outputted to output side routes M(2). The device includes C-band WXC units 22 that are the same in total number as the wavelength bands of the optical signals of the respective wavelength bands and perform relay processing on optical signals of a specific wavelength band (C band) of the different wavelength bands. The device includes input side conversion units (31,32) provided on the input side of the C-band WXC units 22 for converting optical signals of wavelength bands other than the specific wavelength band into optical signals of the specific wavelength band. The device includes output side conversion units (35,36) provided on the output side for converting the optical signals of the specific wavelength band converted on the input side into the before-conversion optical signal. It is configured that the optical signals of the specific wavelength band directly input from the input side are directly output after the relay processing by the C-band WXC units.

This application describes techniques for testing fiber optic telecommunication systems, such as undersea fiber optic cable systems. Testing terminals may be deployed at a location of terminating equipment for a fiber optic cable. The testing terminals may be operated remotely. The testing terminals may be configured to programmatically test the cable by loading one or more tests and automatically configure the cable's transmitters and receivers based on predetermined loading schemes selected based on the tests to be performed. The testing terminals may iterate over channels and fiber pairs of the cable and may use back-to-back tests to remove artifacts from test results. Using the described techniques, a cable's channels and fiber pairs can be fully characterized in the amount of time afforded for a typical testing schedule, which was not generally possible using conventional testing.

A first network device may configure a first bridge connecting a passive optical network (PON) controller and first optical line terminals (OLTs) of the first network device. The first network device may be associated with a PON and each of the first OLTs may be connected to a first plurality of optical network units (ONUs). The first network device may establish a connection between the first bridge and a second bridge of a second network device. The second network device is associated with the PON, the second bridge may connect with second OLTs of the second network device, and each of the second OLTs may connect to a second plurality of ONUs. The PON controller of first network device may receive traffic from a PON domain manager and may provide the traffic to the first OLTs and the first plurality of ONUs via the first bridge.

A method includes: determining, by the control device, that a site receives a first service; determining that a mapping wavelength of a first service is blocked on an original routing path, where the original routing path includes a first line board connected to a first local dimension, and a wavelength occupied by the first local dimension includes the mapping wavelength of the first service; and routing, by the control device, the first service to a second line board connected to a second local dimension, where the mapping wavelength of the first service is available in the second local dimension.

Methods, systems, and apparatus, including an apparatus for generating clusters of building blocks of compute nodes using an optical network. In one aspect, a method includes receiving request data specifying requested compute nodes for a computing workload. The request data specifies a target n-dimensional arrangement of the compute nodes. A selection is made, from a superpod that includes a set of building blocks that each include an m-dimensional arrangement of compute nodes, a subset of the building blocks that, when combined, match the target n-dimensional arrangement specified by the request data. The set of building blocks are connected to an optical network that includes one or more optical circuit switches. A workload cluster of compute nodes that includes the subset of the building blocks is generated. The generating includes configuring, for each dimension of the workload cluster, respective routing data for the one or more optical circuit switches.

Methods, systems, and devices to realize Quality of Service (QoS) in a Free Space Optics (FSO) communications link. In operation, the application generating the data source assigns a QoS value to each data packet for optical transmission. The FSO system converts this value to a QoS metric based on the capability of the system to synthesize transmit signals of varying bandwidths. The QoS modulator synthesizes a waveform with bandwidth selected by the QoS metric. This implementation may take the form of time-division multiplexing either at the intra- or inter-packet level; there are fixed time intervals arranged between the transmit and receive FSO systems for specific waveform bandwidths. The transmit and receive process continues in a typical fashion until the signal reaches the QoS optical receiver followed by the QoS demodulator. Here the bandwidth set by the QoS metric is accounted for in either the analog or digital domain and the recovery of the original data source follows. This process provides the advantage of improved resiliency of critical networking packets in an FSO communications link.

A service processing method in an optical transport network (OTN), including: mapping a client service to a service container; mapping the service container to an OTN frame or an OTN multi-frame composed of a plurality of continuous OTN frames, where a payload area of the OTN frame or the OTN multi-frame includes M unit blocks configured to bear the service container; bearing length indication information of the unit blocks in an overhead area of the OTN frame or the OTN multi-frame; and sending the OTN frame or the OTN multi-frame. Embodiments of the present disclosure further provide a service processing apparatus in an OTN, an electronic device, and a computer-readable medium.