Abstract: Systems and methods for Doppler frequency shift compensation in free space optical links include a modulator configured to modulate a transmitter laser; a receiver including a Local Oscillator (LO) laser configured to receive a coherent signal; and circuitry configured to tune a frequency of the transmitter laser and the LO laser based on an amount of Doppler frequency shift to be compensated. The systems and methods determine an amount of Doppler shift between a first and second satellite and tune the frequency of the transmitter and LO laser based on the determined amount of Doppler frequency shift.

Abstract: A method of configuring an express mesh satellite network includes monitoring a plurality of satellites in a constellation, wherein each of the plurality of satellites includes a plurality of coherent optical modems; determining a topology of the constellation based on (1) ground traffic sources and sinks and (2) locations of any of the plurality of satellites; and causing the any of the plurality of satellites and their corresponding plurality of coherent optical modems to perform one or more of a relay function and a ground link, with corresponding coherent optical modems of the plurality of coherent optical, and based on the topology.

Abstract: An express mesh satellite network includes a plurality of satellites arranged in a constellation, each including a plurality of coherent optical modems, wherein the plurality of satellites are configured in a topology based on traffic sources and sinks on the ground where the topology includes express links where satellites are directly connected in space by the coherent optical modems based on the traffic sources and sinks. The plurality of satellites are configured to become a node in the topology when in an associated affinity area having a ground link or requiring a relay function.

Abstract: A data center fabric includes a plurality of Field Programmable Gate Arrays (FPGAs), each FPGA interconnected by a plurality of links with other FPGAs, a plurality of servers in a data center, and physical network functions associated with the data center, wherein the plurality of FPGAs form a virtual fabric for switching between the FPGAs, the plurality of servers, and the physical network functions, and wherein the virtual fabric is arranged in a compound graph and a flat network with each FPGA being a node and a diameter of the compound graph and the flat network is indicative of a maximum number of hops for a packet through the virtual fabric.

Abstract: Systems and methods for creating network topology plans are provided. A method, according to one implementation, includes receiving a first constraint (number of nodes) to be set in a graph (under construction). The graph, when complete, is configured to include nodes and interconnections so as to enable each node to reach any other node via one or more interconnections. The method also includes receiving a second constraint (number of degrees) to be set with respect to each node and which defines the maximum number of interconnections that can be connected to each node. Upon determining that the graph is developed to an extent where each node is connected to at least one interconnection and every node is reachable by any other node, the method further includes performing functions to improve metrics related to a hop count that represents a number of interconnections needed for one node to reach another.

Abstract: Systems and methods include an optical switch system which provides a combination of µLED arrays, PDs, imaging fiber cables, and crosspoint switch on a single chip. The system includes one or more input ports with each inputport configured to connect to an inputfiber bundle. The system additionally includes one or more output ports with each output port configured to connect to an outputfiber cable, wherein each of the inputfiber bundle and the outputfiber cable include a plurality of fiber cores. An electrical crosspoint switch is connected to the one or more input ports and the one or more output ports, wherein the electrical crosspoint switch is configured to connect a given input port to a corresponding output port, including all signals in the input fiber cable to the corresponding output fiber cable.

Abstract: An express mesh satellite network includes a plurality of satellites arranged in a constellation, each including a plurality of coherent optical modems, wherein the plurality of satellites are configured in a topology based on traffic sources and sinks on the ground where the topology includes express links where satellites are directly connected in space by the coherent optical modems based on the traffic sources and sinks. The plurality of satellites are configured to become a node in the topology when in an associated affinity area having a ground link or requiring a relay function.

Abstract: Systems, methods, and computer-readable media are provided for controlling the distribution of data packets to intermediate buffers, such as Virtual Output Queues (VOQs) of a group of nodes. A method, according to one implementation, includes a step of detecting traffic congestion metrics associated with an egress port of a destination node grouped in a set of related nodes in a network. Each of the related nodes includes a dedicated buffer device. Based on the detected traffic congestion metrics, the method further includes the step of distributing data packets, which are intended for transmission to the egress port of the destination node, intermediately to the dedicated buffer device of one or more of the related nodes.

Abstract: Systems, methods, and computer-readable media are provided for controlling the distribution of data packets to intermediate buffers, such as Virtual Output Queues (VOQs) of a group of nodes. A method, according to one implementation, includes a step of detecting traffic congestion metrics associated with an egress port of a destination node grouped in a set of related nodes in a network. Each of the related nodes includes a dedicated buffer device. Based on the detected traffic congestion metrics, the method further includes the step of distributing data packets, which are intended for transmission to the egress port of the destination node, intermediately to the dedicated buffer device of one or more of the related nodes.

Abstract: A flat data center network includes a plurality of switches each including a first plurality of server facing ports connected to a first set of servers, and a plurality of network facing ports connected to other switches of the plurality of switches, wherein the plurality of switches are interconnected via corresponding network facing ports in a semi-structured random network architecture that enables additional servers to be added to the flat data center network during operation while maintaining random interconnect.

Abstract: A Photonic Integrated Circuit (PIC) includes N Ring and Disk type Microstructures (RDMs), N is an integer and greater than 1; at least one spare RDM, wherein each RDM operates spectrally in a periodic nature and has its spectral operation vary by temperature; and circuitry configured to handoff any of the N RDMs and the at least one spare RDM for spectral operation based on a current temperature. For the handoff, the at least one spare RDM is unlocked spectrally and is tuned and locked to a frequency of interest of a current RDM based on the temperature, and the current RDM is unlocked.

Abstract: Programmable switches and routers are described herein for enabling their internal network fabric to be configured with a topology. In one implementation, a programmable switch is arranged in a network having a plurality of switches and an internal fabric. The programmable switch includes a plurality of programmable interfaces and a buffer memory component. Also, the programmable switch includes a processing component configured to establish each of the plurality of programmable interfaces to operate as one of a user-facing interface and a fabric-facing interface. Based on one or more programmable interfaces being established as one or more fabric-facing interfaces, the buffer memory component is configured to store packets received from a user-facing interface of an interconnected switch of the plurality of switches via one or more hops into the internal fabric.

Abstract: Programmable switches and routers are described herein for enabling their internal network fabric to be configured with a topology. In one implementation, a programmable switch is arranged in a network having a plurality of switches and an internal fabric. The programmable switch includes a plurality of programmable interfaces and a buffer memory component. Also, the programmable switch includes a processing component configured to establish each of the plurality of programmable interfaces to operate as one of a user-facing interface and a fabric-facing interface. Based on one or more programmable interfaces being established as one or more fabric-facing interfaces, the buffer memory component is configured to store packets received from a user-facing interface of an interconnected switch of the plurality of switches via one or more hops into the internal fabric.

Abstract: Systems and methods for building routing tables for use in a data center network are provided. A switch is arranged in a network environment having a plurality of switches. The switch includes a plurality of inward-directed ports configured for direct connection with a plurality of servers and a plurality of outward-directed ports configured for direct connection with a subset of the plurality of switches. The switch also includes a processor configured to generate a Routing Table (RT) in an RT build process and to create a Forwarding Table (FT) for forwarding packets when the RT build process is complete. The outward-directed ports are configured to forward packets to one or more switches of the subset of switches according to the RT. The FT includes at least a Shortest Path (SP) route and one or more Off-Shortest Path (OSP) routes for forwarding the packets to the one or more switches.

Abstract: Systems and methods for building routing tables for use in a data center network are provided. In one embodiment, a switch is arranged in a network environment having a plurality of switches. The switch includes a plurality of inward-directed ports configured for direct connection with a plurality of servers and a plurality of outward-directed ports configured for direct connection with a subset of the plurality of switches. The switch also includes a processor configured to generate a Routing Table (RT) in an RT build process and to create a Forwarding Table (FT) for forwarding packets when the RT build process is complete. The outward-directed ports are configured to forward packets to one or more switches of the subset of switches according to the RT. The FT includes at least a Shortest Path (SP) route and one or more Off-Shortest Path (OSP) routes for forwarding the packets to the one or more switches.

Abstract: A flat data center network includes a plurality of switches each including a first plurality of server facing ports connected to a first set of servers, and a plurality of network facing ports connected to other switches of the plurality of switches, wherein the plurality of switches are interconnected via corresponding network facing ports in a semi-structured random network architecture that enables additional servers to be added to the flat data center network during operation while maintaining random interconnect.

Abstract: An optical reshuffler system for implementing a flat, highly connected optical network for data center and High-Performance Computing applications includes a first optical reshuffler having a plurality of ports each configured to optically connect to a corresponding switch and having internal connectivity which optically connect each of the plurality of ports internal to the first optical reshuffler such that each port connects to one other port for switch interconnection, wherein the internal connectivity in the first optical reshuffler and ports follow rules by which subtending switches are added to corresponding ports provide a topology for the flat, highly connected optical network.

Abstract: A data center fabric includes a plurality of Field Programmable Gate Arrays (FPGAs), each FPGA interconnected by a plurality of links with other FPGAs, a plurality of servers in a data center, and physical network functions associated with the data center, wherein the plurality of FPGAs form a virtual fabric for switching between the FPGAs, the plurality of servers, and the physical network functions, and wherein the virtual fabric is arranged in a compound graph and a flat network with each FPGA being a node and a diameter of the compound graph and the flat network is indicative of a maximum number of hops for a packet through the virtual fabric.

Abstract: A cross-point switch system forming an adaptive communication network between a plurality of switches includes a plurality of ports connected to the plurality of switches, wherein the plurality of switches are connected to one another via a Port Aggregation Group (PAG) comprising multiple ports with a same set of endpoints between two switches; and a cross-point switch fabric configured to connect the plurality of ports between one another, wherein the cross-point switch fabric is configured to rearrange bandwidth in a PAG due to congestion thereon without packet loss.

Abstract: A cross-point switch system forming an adaptive communication network between a plurality of switches includes a plurality of ports connected to the plurality of switches, wherein the plurality of switches are connected to one another via a Port Aggregation Group (PAG) comprising multiple ports with a same set of endpoints between two switches; and a cross-point switch fabric configured to connect the plurality of ports between one another, wherein the cross-point switch fabric is configured to rearrange bandwidth in a PAG due to congestion thereon without packet loss.