Abstract: This disclosure describes techniques for improved multicast network telemetry implemented over multilayer switches in a PIM domain. The multilayer switches may be configured to collectively certify end-to-end flow provisioning, and to publish telemetry data certifying flow provisioning from a single notifier to an external controller host. Computational workload and network traffic for streaming data related to certifying path provisioning is kept to a minimum for each flow that needs to be certified, which also keeps compounding of network traffic for many different flows to a minimum. Moreover, since controller hosts are notified upon successful provisioning but not at other times, controller hosts can trust that the telemetric data is minimally latent, and may be relied upon to enact timely actions which produce desired outcomes.

Abstract: Significantly optimized multi-stage networks, useful in wide target applications, with VLSI layouts using only horizontal and vertical hop wires to route large scale computational blocks having inlet and outlet links, and laid out in an integrated circuit device in a two-dimensional grid arrangement of partial multi-stage hierarchical networks are presented. The optimized multi-stage networks comprising partial multi-stage hierarchical networks employ one or more rings of stages of switches with inlet and outlet links of computational blocks connecting to rings from either left-hand side, or from right-hand side, or from both left-hand side and right-hand side and employ hop wires from outlet links of switches of a first stage of a first ring of a first partial multi-stage hierarchical network are connected to either inlet links of switches of the first or a second stage of the first or a second ring of the first or a second partial multi-stage hierarchical network.

Abstract: Processing a purge request is disclosed. In an embodiment, the purge request is received from a node, where the purge request is for a next purge instruction and the node has an associated queue of purge instruction(s) with associated timestamps. In response to receiving the purge request, providing an unprocessed purge instruction having a time stamp before a threshold time. After processing the purge instruction having a timestamp before the threshold time, processing the remaining purge instructions as follows: indicating an availability state of the node as transitional, storing a current time value as a reference time value, processing in chronological order those remaining purge instructions in the queue with a time value chronologically before the reference time value, and indicating an availability state of the node as available.

Abstract: A method and a device are provided for managing, in a receiving entity, data packets received from a transport layer connection established with a transmitting entity. The connection includes at least one stream in connected mode and at least one stream in non-connected mode. The management method includes transmitting, by the receiving entity, a so-called return message, relating to at least one data packet from one of the two streams in connected mode or in non-connected mode of the connection, the return message being transmitted to the transmitting entity on the other stream of the connection.

Abstract: A system for controlling a subsea device comprises a complimentary set of data communication interfaces operatively coupled to an electronically interrogatable component of a subsea device and a remotely disposed device controller via a power conductor which defined data pathway between the subsea device and the remotely disposed device controller. A data transceiver is operatively coupled to the electronically interrogatable component and the remotely disposed device controller via the complimentary set of data communication interfaces over the power conductor. In configurations, control and/or telemetry or other data may be unidirectionally and/or bidirectionally transmitted between the electronically interrogatable component of a subsea device and a remotely disposed device controller.

Abstract: A system for processing a purge request is disclosed. The purge request is received. An availability state for each content distribution node in a group of content distribution nodes is stored. Based on the purge request, one or more purge instructions are generated for one or more available state content distribution nodes of the group. Based on the purge request, one or more delayed purge instructions are queued for one or more unavailable state content distribution nodes of the group. It is determined that the one or more available state content distribution nodes of the group have completed processing the one or more purge instructions generated for the one or more available state content distribution nodes. Based at least in part on the queuing of the one or more delayed purge instructions for the one or more unavailable state nodes, it is confirmed that the purge request has been completed.

Abstract: A method for using a shared device and a resource sharing system are provided. An arbitrator node sets an initial weight of each of processors based on identification information. The arbitrator node calculates a priority score for each processor based on an initial weight of each of the processors and state diagnostic codes recorded by each processor to establish a priority sequence. When the arbitrator node simultaneously receives a request for requesting an access right of the shared device transmitted by each of two or more processors, the arbitrator node determines one of the processors having the access right of the shared device based on the priority sequence.

Abstract: Disclosed are an ONU, a communication system and a communication method for an ONU. The ONU provided in the present disclosure includes a processing module and at least two user interface modules. At least two ONU sub-modules are disposed in the processing module. The disposed ONU sub-modules are corresponding to the user interface modules in a one-to-one manner. Each ONU sub-module processes the user side data from a corresponding user interface module.

Abstract: A large-scale switching system configured as a global network or a large-scale data center employs switches arranged in a matrix having multiple rows and multiple columns. The switching system supports a large number of access nodes (edge nodes). Each access node has a channel to each switch in a respective row and a channel from each switch of a respective column. Thus, an access node connects to input ports of a set of switches and output ports of a different set of switches. Each access node has a path to each other access node traversing only one of the switches. Controllers of switches of each diagonal pair of switches are integrated or mutually coupled to provide a return control path for each access node. The switches may be arranged into constellations of collocated switches to facilitate edge-node access to switches using wavelength-division-multiplexed links. The switches are preferably fast optical switches.

Abstract: A network of global coverage, scalable to an access capacity of hundreds of petabits per second, is configured as independent bufferless switches with spectral routers connecting edge nodes to the switches. The switches are logically arranged in at least one matrix, the spectral routers are logically arranged into a matrix of upstream spectral routers and a matrix of downstream spectral routers. Each edge node has a link to an upstream spectral router in each column of the matrix of upstream spectral routers and a link from a downstream spectral router in each row of the matrix of downstream spectral routers. Preferably, all sets of edge nodes connecting to the upstream spectral routers are selected to be mutually orthogonal. Each switch is coupled to a respective switch controller and a respective time indicator. Each switch controller entrains time indicators of a set of subtending edge nodes to enable coherent switching.

Abstract: Processing a purge request is disclosed. The purge request is received. Based on the purge request, a purge instruction is generated for each content distribution node of a group of one or more content distribution nodes. Each content distribution node of the group is verified has either completed processing the purge instruction or is determined to be unavailable. Despite at least one content distribution node of the group determined to be unavailable having not completed processing the purge instruction, an indication is authorized that the purge request has been completed.

Abstract: A device for switchably routing down-converted radio frequency (RF) signals from a plurality of inputs to a plurality of outputs, and a method of operating the same. The device includes a respective switch for each output. The device also includes an interconnect arrangement. The interconnect arrangement includes a respective transmission line for each input. Each transmission line includes a plurality of branches for routing a down-converted RF signal received at the input of that transmission line to the switch of each output. The switch of each output is operable selectively to connect one of the transmission lines to its output. The interconnect arrangement also includes a plurality of cross-over points at which two of the branches cross over each other.

Abstract: A multi-stage switch fabric (SF) is provided. The multi-stage SF includes a line card chassis (LCC) and a fabric card chassis (FCC). The FCC includes a stage-1 switch element (S1), a stage-2 switch element (S2), and a stage-3 switch element (S3), where the S3 corresponds to the S1, and the S2 is coupled to the S1 and S3 respectively. The LCC includes an interface component and a line card (LC) coupled to the interface component, where the interface component is coupled to the S1 and S3 in the FCC respectively. Through the technical solution under the present invention, when a switch element generates flow control information and requires another switch element or an LC to respond to the flow control information, a timely response can be received.

Abstract: Examples of are disclosed for configuring one or more routes through a three-stage Clos-network packet switch.

Abstract: In one embodiment, a method, comprising producing a first policy vector based on a first portion of a data packet received at a multi-stage switch. The method also includes producing a second policy vector based on a second portion of the data packet different than the first portion of the data packet. A third policy vector is produced based on a combination of at least the first policy vector and at least the second policy vector. The third policy vector including a combination of bit values configured to trigger an element at the multi-stage switch to process the data packet.

Abstract: A method of operating a circuit for processing a digital signal is disclosed. The circuit includes various circuit stages having respective enabled states. A present signal path is established which includes circuit stages in their respective enabled states. Power is disabled to selected circuit stages not used in the present signal path so as to minimize power consumption in the disabled circuit stages. A data signal is then processed through the circuit stages in the present signal path. Before a next signal path is needed, power is re-enabled to selected disabled circuit stages in the next signal path to allow the enabled circuit stages to approach their respective enabled states. Then the next signal path can be established including the enabled circuit stages in their respective enabled states. The data signal can then be processed through the circuit stages in the next signal path.

Abstract: A data-communications switch having at least two modes of operation is provided. The data communications switch includes a first Clos switch having a first mode of operation and a second Clos switch, which is combined with the first Clos switch, for providing a second mode of operation. The first Clos switch and second Clos switch are interconnected in an overlapping manner to form a switch fabric, which is essentially a superset of both the first Clos switch and the second Clos switch and can be configured to operate in either mode depending on system requirements.

Abstract: In a switch system L groups of the line switch elements are connectable to cables that include L links such that each of the L links within a cable connect to a switch element of a respective one of the L groups. Fabric switch elements are connected such that a fabric switch element is connected to the line switch elements of one of the group of line switch elements.

Abstract: A rearrangeably nonblocking multicast network includes an input stage having r1 switches and n1 inlet links for each of r1 switches, an output stage having r2 switches and n2 outlet links for each of r2 switches. The network also has a middle stage of m switches, and each middle switch has at least one link connected to each input switch for a total of at least r1 first internal links and at least one link connected to each output switch for a total of at least r2 second internal links, where m?n1+n2. The network has all multicast connections set up such that each multicast connection passes through at most two middle switches to be connected to the destination outlet links.

Abstract: A cross connect switch has a plurality of stages. Each stage has a plurality of packers, a plurality of memory portions and a plurality of multiplexers. Each packer receives input data and provides the input data as a set of contiguous valid data. The multiplexers divide the valid data from one of the packers into a plurality of data subsets and route each data subset to a respective memory portion of that stage. Each stage except the final stage provides the data in the memory portions of that stage as a respective set of inputs to a next one of the stages. The final stage includes a plurality of multiplexers for selecting a respective subset of the data from each of the memory portions of the final stage and provides the selected data at a plurality of respective selected output ports.

Abstract: An interconnection network has a first stage network and a second stage network and a collection of devices outside the network so that a first device is capable of sending data to a second device. The first stage network is connected to inputs of the second stage network. The first and second stage networks each have more outputs than inputs. The data is first sent from the first device to the first stage network and then from the first stage network to the second stage network. The data is sent to the second device from the second stage network. The number of inputs to a device from the second stage network exceeds the number of outputs from a device into the first stage network. The latency through the entire system may be a fixed constant.

Abstract: A switch is provided that receives user information through a plurality of framer circuits, which group the user information into frames. The frames are fed to a switch fabric including an array of switch elements, each having a switch matrix for routing each frame to a desired output in accordance with configuration data stored in a first table coupled to the switch matrix. If different outputs are desired, i.e., the switch matrix is to be reconfigured, a switch control circuit supplies additional switch configuration data to the frames through the inputs along with additional user information to be routed through the switch. While the additional switch configuration data is stored in a second table, data flow remains uninterrupted through the switch matrix.

Abstract: An embodiment of the present invention is disclosed to include a three stage scalable switching network that can be built from a common module. Further disclosed are methods for building switching network v(k, n, m) from a common module comprising a (n×k) input switch, a (k?×k?) middle switch, and a (k×n) output switch.

Abstract: Broadband switching including the implementation of and control over a massive sub-microsecond switching fabric. To effect the attributes of the switching fabric, conditionally nonblocking components are used a building-blocks in an interconnection network which is recursively constructed. The properties of the interconnection network are preserved during each recursion to thereby configure the massive switching fabric from scalable circuitry.

Abstract: A switch is provided that includes three stages. The first stages has a plurality of switch circuits. The second stage has a plurality of switch circuits equal to N, where N is any integer other than a power of 2 and where the switch circuits can be logically configured into a logical configuration of a power of 2. The third stages includes a plurality of switch circuits.

Abstract: In a packet switch structured by connecting unit switches in multi-stages which is capable of transmitting packets without delay and accommodating high-speed lines, unit switches at the first stage assign, to an input packet, a sequence number according to a destination of the packet and distribute and send out the packet to a unit switch at the succeeding stage and unit switches at the final stage sequence and output packets according to sequence numbers assigned to packets received from a unit switch at the preceding stage.

Abstract: A time/space switching component is provided with multiple functionality that includes a time switching unit, of a space switching unit of a data channel sequence correction unit and of a control unit. As a result of corresponding mode selection, the different functionalities for a switching network are obtained with a single component, resulting in a significant reduction in an overall expenditure for development and manufacture.

Abstract: A chassis for holding modules including a set of first modules oriented horizontally in the chassis and a set of second modules oriented vertically in the chassis. A midplane is oriented orthogonally to the sets of first and second modules. The midplane has connector pins extending from its first side through its second side. Each of the first modules has a first connector for mating with the connector pins extending from the first side, and each of the second modules has a second connector for mating with the connector pins extending from the second side.

Abstract: A switch is provided that receives user information through a plurality of framer circuits, which group the user information into frames. The frames are fed to a switch fabric including an array of switch elements, each having a switch matrix for routing each frame to a desired output in accordance with configuration data stored in a first table coupled to the switch matrix. If different outputs are desired, i.e., the switch matrix is to be reconfigured, a switch control circuit supplies additional switch configuration data to the frames through the inputs along with additional user information to be routed through the switch. While the additional switch configuration data is stored in a second table, data flow remains uninterrupted through the switch matrix.

Abstract: A novel folded Clos switch apparatus and method therefore for reducing the number of unemployed I/O terminals of a multistage Clos switching network by partitioning a crossbar switch to provide both the first (yth) and last (x−y+1th) stage of a multistage Clos switch where x is the total number of stages in the general case.

Abstract: A method of controlling detouring in an integrated network which includes communication devices includes the steps of registering routes at a communication device connected to terminal devices of respective media types such that the routes include a main route and a detour route with respect to each of the media types, and establishing a connection along the detour route registered for a media type upon finding unavailability of the main route registered for the media type when a call of the media type is requested from one of the terminal devices.

Abstract: A high density electronic switching matrix (ESM) includes several splitting modules (200) arranged along a first axis, each including a signal input (202) and several splitter outputs (204). The ESM (500, 600) further includes several switching modules (400) arranged along a second axis perpendicular to the first axis. Each switching module (400) includes switching inputs (402) coupled individually to an output of each of the splitting modules (200). The ESM (500, 600) is further characterized by couplings between the splitter modules and the switching modules. The couplings are formed by mating male and female connectors (300) integrated into the splitting modules and the switching modules. The couplings support extremely high frequency operation. The splitting modules (200) and the switching modules (400) may thus be coupled closely together to form a dense, high frequency, switching matrix, and may be stacked upon one another.

Abstract: A multi-stage signal router includes a clocked storage element connected to each output of each stage of the router. Each clocked storage element is responsive to a trigger event of a clock signal to capture a signal level present at the output to which it is connected and hold the signal level at its own output until a subsequent trigger event of the clock signal.

Abstract: Broadband switching including the implementation of and control over a massive sub-microsecond switching fabric. To effect the attributes of the switching fabric, conditionally nonblocking components are used a building-blocks in an interconnection network which is recursively constructed. The properties of the interconnection network are preserved during each recursion to thereby configure the massive switching fabric from scalable circuitry.

Abstract: A switch is provided that includes three stages. The first stages has a plurality of switch circuits. The second stage has a plurality of switch circuits equal to N, where N is any integer other than a power of 2 and where the switch circuits can be logically configured into a logical configuration of a power of 2. The third stages includes a plurality of switch circuits.