A distribution network with point-to-multipoint architecture couples a line termination unit to a plurality of network termination units. A network termination unit includes one or more user network interfaces configured to interface with respective user equipment of respective users, a downstream packet buffer for temporary storage of data packets, a downstream packet buffer monitor configured to monitor the status of the downstream packet buffer and to generate back-pressure signals indicative for the status, wherein the status corresponds to a fill level or fill level variation of the downstream packet buffer, and an upstream transmitter configured to upstream transmit the back-pressure signals to the line termination unit to be used there for shaping and/or scheduling future downstream transmission of data packets to the one or more user network interfaces.

It is difficult to improve the usage efficiency of an optical communication network due to the passband narrowing effect in a wavelength selection process in an optical communication network using a wavelength division multiplexing system; therefore, an optical network management apparatus according to an exemplary aspect of the present invention includes wavelength selection information generating means for generating wavelength selection information on a wavelength selection process through which an optical path accommodating an information signal goes, with respect to each optical path; and wavelength selection information notifying means for notifying an optical node device through which the optical path goes of the wavelength selection information.

The present invention provides a method and system of OSNR-sensing spectrum allocation with optical channel performance guarantee. The method includes constructing an OSNR evaluation model; acquiring the shortest path between a source node and a destination node; acquiring a plurality of modulation formats and corresponding thresholds, sorting the plurality of modulation formats in descending order, and acquiring a list of the sorted modulation formats; calculating the bandwidth required by the lightpath service based on the bandwidth demand and FEC overhead by using the modulation format with the highest spectrum efficiency; substituting the bandwidth required by the lightpath service into the OSNR evaluation model and obtaining the number of FS actually required by the service; and allocating the spectrum resource required by the current service to the shortest path by using a first-fit algorithm and obtaining the center frequency of the current service on the lightpath.

This disclosure describes multiplexed optical transceivers, such as DWDM multiplexer/demultiplexers, which are aggregated in a server chassis to establish a fabric topology interconnecting blade servers to a dedicated switch module. Blade servers installed in the server chassis can utilize not just Ethernet interfaces to connect to network segments, but also PCIe interfaces as well as a combination of Ethernet and PCIe interfaces. The aggregated optical transceivers multiplex and demultiplex wavelength-specific optical signals using a laser source, reducing power consumption over switched fabric ASICs. Servicing of the multiplexed optical transceivers is facilitated by installation and replacement of a laser source. Scaling and redundancy of fabric topology interconnects can be facilitated by selection of laser sources generating expanded ranges of discrete wavelengths. Furthermore, chassis management can be facilitated by configuring network controllers of blade servers to transport chassis management instructions over the fabric topology in-band over a network interface, rather than by an out-of-band pathway.

Embodiments of this application provide a method and an apparatus for obtaining optical distribution network (ODN) logical topology information, a device, and a storage medium. The method includes: obtaining identification information of each first ONU that is connected to a first passive optical network (PON) port and whose optical path changes and feature data of the first ONU in a first time window, where the feature data includes receive optical power and/or an alarm event; obtaining, based on the feature data of each first ONU, a feature vector corresponding to each first ONU; and performing cluster analysis on the feature vector corresponding to each first ONU, to obtain topology information corresponding to the first PON port. ONU topology information is obtained by analyzing an ONU feature.

A data communication network includes a plurality of network nodes coupled together via optical links and a network controller. Each network node includes a reflectometry analyzer that provides a characterization of physical properties of the optical links coupled to the associated network node. The characterization for each particular optical link provides a unique fingerprint of the physical properties of the particular optical link. The network controller determines a network path between a first network node and a second network node, wherein the network path traverses a first optical link, receives a first fingerprint for the first optical link from a first reflectometry analyzer, defines a signature for the path, the signature including the first fingerprint, receives a second fingerprint for the first optical link from the first reflectometry analyzer, the second fingerprint being different from the first fingerprint, and determines that the network path is not secure based upon the difference between the first fingerprint and the second fingerprint.

Technologies for dynamically managing resources in disaggregated accelerators include an accelerator. The accelerator includes acceleration circuitry with multiple logic portions, each capable of executing a different workload. Additionally, the accelerator includes communication circuitry to receive a workload to be executed by a logic portion of the accelerator and a dynamic resource allocation logic unit to identify a resource utilization threshold associated with one or more shared resources of the accelerator to be used by a logic portion in the execution of the workload, limit, as a function of the resource utilization threshold, the utilization of the one or more shared resources by the logic portion as the logic portion executes the workload, and subsequently adjust the resource utilization threshold as the workload is executed. Other embodiments are also described and claimed.

A network management system includes a network interface communicatively coupled to one or more network elements in a network for exchanging Operations, Administration, Maintenance, and Provisioning (OAM&P) data; a processor communicatively coupled to the network interface; and memory storing instructions that, when executed, cause the processor to obtain the OAM&P data from the network, provide a Graphical User Interface (GUI) based on the network from the OAM&P data, wherein the GUI includes a network map which provides a topological view and a subway view which provides a detailed device-level view which is more granular than the network map and illustrates individual components at each site, receive a selection from a user of a service in the network, and update the GUI to highlight the service in the network map and illustrate the associated sites in the subway view.

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 data specifying requested compute nodes for a computing workload. The data specifies a target arrangement of the nodes. A subset of building blocks of a superpod is selected. A logical arrangement of the subset of compute nodes that matches the target arrangement is determined. A workload cluster of compute nodes that includes the subset of the building blocks is generated. For each dimension of the workload cluster, respective routing data for two or more OCS switches for the dimension is configured. One-to-many switches are configured such that a second compute node of each segment of compute nodes is connected to a same OCS switch as a corresponding first compute node of a corresponding segment to which the second compute node is connected.

Methods, systems, and devices for a quantum Internet router are described. A first network node (e.g., a quantum Internet router) may receive a command from a second network node by a digital information channel indicating a destination network node, a Bell State Measurement (BSM), and a pair of entangled particles establishing a quantum entangled channel between the first and second network nodes. The first network node may determine a third network node to forward the command based on a forwarding table and generate a second BSM based on a QSR operation and a second pair of entangled particles establishing a quantum entangled channel between the first and third network nodes. The first network node may forward, to the third network node, a command indicating the destination network node, the second BSM, and the second pair of entangled particles.