43results about "Electromagnetic network combinations" patented technology

Embodiments of the invention include an apparatus and system for managing and radially distributing optical fibers from a first location, such as a central office, to a plurality of destination locations, such as homes within a neighborhood. The apparatus includes a distribution panel having a central hub or ring, and both a plurality of optical input elements and a plurality of optical output elements disposed radially around the central hub. The optical input elements split the fibers coupled from the first location into a plurality of individual fibers that are routed to the central hub. The central hub radially distributes the plurality of fibers to appropriate optical output elements, which are coupled to destination fibers routed to the plurality of destination locations. The radial configuration of the apparatus provides a central breakout point for fiber distribution, thus improving fiber organization and routing management compared to conventional routing and distribution systems.

An optical switch fabric, including: a first set of horizontal optical waveguides receiving a plurality of wavelengths; a plurality of wavelength-selective drop optical switches associated with the first set of horizontal optical waveguides, wherein the plurality of wavelength-selective drop optical switches are each configured to drop a selected wavelength from a horizontal optical waveguide of the first set of horizontal optical waveguides to an associated vertical optical waveguide of a plurality of vertical optical waveguides; and a plurality of controllable optical switches associated with the plurality of vertical optical waveguides, wherein the plurality of controllable optical switches are each configured to direct a selected wavelength from a vertical optical waveguide of the plurality of vertical optical waveguides to a horizontal optical waveguide of a second set of horizontal optical waveguides, and wherein the second set of horizontal optical waveguides output a plurality of wavelengths.

PCT No. PCT / SE96 / 00374 Sec. 371 Date Dec. 29, 1997 Sec. 102(e) Date Dec. 29, 1997 PCT Filed Mar. 26, 1996 PCT Pub. No. WO96 / 31964 PCT Pub. Date Oct. 10, 1996An optical network which is arranged to ensure communication between nodes in a lower-order loop and a higher-order loop when there is an interruption in the lower-order loop or in the event of hub failure. Each lower-order loop consists of a bus network with hubs and one or a plurality of nodes. Two optical fibers connect the nodes in each bus network and are used for communication in opposite directions between the nodes. Each bus network comprises precisely two hubs of which the first closes the bus network end at the first end thereof and the second closes the bus network at the other end. The hubs connect the bus networks in a lower-order loop and join this loop to a higher-order loop. Each node in the bus network is arranged to communicate with each hub. Channel allocation can be carried out so that channels received in one node are re-used for transmission on the same fiber from the same node.

The invention discloses an interconnection structure and a method for configuring path between the optical networks. The optical network includes a first network and a second network, the first network and the second network each has a number of nodes, a first node of the first network connects with a third node of the second network, a second node of the first network connects with a fourth node of the second network. The method comprises the steps of: setting-up a first path between one of the first node and the second node and another node of the first network; and at least by one link of the link between the first node and the third node and that between the second node and the fourth node, and by the first path, said another node of the first network communicates for path with another node of the second network. By the dual-node interconnection structure and the path configuration shceme of this invention between a ring network and a mesh network, and between mesh networks, the respective advantages of the ring network and the mesh metwork in regard to protection and restoration can be combined effectively, and the existing internetworking schemes between the rings are also compatible.

A system for communicating wireless signals includes a passive optical network (PON) between a central office (CO) and network subscribers. The CO has an optical line terminal (OLT) and a wireless base station. An RF / Optic converter converts base station radio frequency (RF) signals to and from corresponding optical signals. An optical combiner combines signals of the OLT and signals of the RF / Optic converter for communication over the PON with at least one optical network unit (ONU) at a location of one or more of the network subscribers, so that signals of the OLT and converted wireless base station signals are carried together over the PON. A fiber mounted wireless antenna unit (FMCA) having an optical interface and a wireless antenna, and communicating wireless signals of the wireless antenna with the ONU, including performing conversions between wireless RF signals and optical signals.

The invention is directed to a method and system for supporting MIMO technologies which can require the transport of multiple spatial streams on a traditional Distributed Antenna System (DAS). According to the invention, at one end of the DAS, each spatial stream is shifted in frequency to a pre-assigned band (such as a band at a frequency lower than the native frequency) that does not overlap the band assigned to other spatial streams (or the band of any other services being carried by the DAS). Each of the spatial streams can be combined and transmitted as a combined signal over a common coaxial cable. At the other “end” of the DAS, the different streams are shifted back to their original (overlapping) frequencies but retain their individual “identities” by being radiated through physically separate antenna elements.

An optical switch fabric, including: a first set of horizontal optical waveguides receiving a plurality of wavelengths; a plurality of wavelength-selective drop optical switches associated with the first set of horizontal optical waveguides, wherein the plurality of wavelength-selective drop optical switches are each configured to drop a selected wavelength from a horizontal optical waveguide of the first set of horizontal optical waveguides to an associated vertical optical waveguide of a plurality of vertical optical waveguides; and a plurality of controllable optical switches associated with the plurality of vertical optical waveguides, wherein the plurality of controllable optical switches are each configured to direct a selected wavelength from a vertical optical waveguide of the plurality of vertical optical waveguides to a horizontal optical waveguide of a second set of horizontal optical waveguides, and wherein the second set of horizontal optical waveguides output a plurality of wavelengths.

A node in a hybrid wireless link includes a free space optical (FSO) terminal and a radio frequency (RF) terminal. The FSO terminal is configured to transmit data over an FSO link, and the RF terminal is configured to transmit data over a free space RF link. The node also includes a switch / controller coupled to the FSO terminal and the RF terminal. The switch / controller is configured to receive data and determine at the data link layer whether to transmit data frames of the data over the FSO link, the RF link, or both. The determination is based on the content of the data frames, and, once the determination is made, the switch / controller steers the data frames to the FSO terminal, the RF terminal, or both. In some embodiments, the switch / controller makes the determination at the network layer.

An optical fiber data communications network in which an electro-optical transceiver couples a plurality of serial electrical data buses over a single bidirectional optical fiber link, and includes a controller that functions by oversampling the digital electrical signal on each of such buses, multiplexes them, and converts the signal into a high speed optical signal for transmission over an optical fiber.

Circuitry of a hybrid fiber-coaxial network may comprise a first transceiver configured to connect the circuitry to an optical link, a second transceiver configured to connect the circuitry to an electrical link, a first processing path, a second processing path, and a switching circuit. In a first configuration, the switching circuit may couple the first transceiver to the second transceiver via the first processing path. In a second configuration, the switching circuit may couple the first transceiver to the second transceiver via the second processing path. The first transceiver may comprise a passive optical network (PON) transceiver and the second transceiver may comprise a data over coaxial service interface specification (DOCSIS) physical layer transceiver. The switching circuit may be configured based on the type of headend to which the circuitry is connected.

The invention discloses a water-land optical communication network architecture and a communication method based on interconnection between underwater visible light communication network units (UVNU) and a fiber. The communication network architecture comprises an optical line terminal (OLT), a separator / coupler, the UVNUs and underwater users, wherein the OLT is connected with a core network and arranged on the land; and the separator / coupler, the UVNUs and the underwater users are all arranged underwater. The communication method comprises steps: the network is firstly initialized, and data collected by a certain underwater user are transmitted to the connected UVNU in an uplink mode and then transmitted to the OLT; if the OLT recognizes the destination address to be the land terminal, the data are transmitted to the core network; or otherwise, the OLT adds the identification code of the UVNU at the destination address to a data frame, and the data frame is broadcasted to the UVNU; the UVNU judges whether the identification code is the same as that of the UVNU itself, and if not, discarding is carried out, or otherwise, the UVNU broadcasts the data frame with the identification code of the destination underwater user to the underwater user; and finally, the underwater user judges whether the identification code is the same as that of the underwater user himself or herself, if yes, the data are demodulated, or otherwise, the data are discarded.

The embodiment of the invention discloses an active optical antenna, a microwave transmission system and a method for transmitting information. The active optical antenna comprises a base, a ground plane, power-supply grids, a plurality of antenna elements, photodetector pipes and an optical waveguide, wherein the ground plane is arranged at the bottom of the base; the power-supply grids and the antenna elements are arranged on the top of the base; the photodetector pipes are arranged in the base and positioned between the antenna elements and the ground plane; the power-supply grids supply power to the photodetector pipes; the number of the photodetector pipes is equal to the number of the antenna elements; the output terminals of the photodetector pipes are coupled to the antenna elements for outputting radio-frequency signals; and the optical waveguide is arranged in the base and connected with the photodetector pipes. By adopting the embodiment of the invention, the cost of the antennas is reduced and the integration level is improved; moreover, since the signal to be transmitted which is received by the antennas is an optical signal, the light splitting can be completed by a planar lightwave circuit technique so that the distribution of the optical power can be completed in an optical domain, and the matching and the attenuation of an electrical signal distributing network are avoided.

The invention relates to the technical field of network communication, in particular to an edge data center dynamic stacking configuration method and device. The method comprises the following steps of establishing a mathematical model for determining the deployment position of each edge data center in the mobile transmission network, wherein one edge data center at least comprises a server, a core switch, an optical line terminal and a 5G baseband processing unit, and the edge data center is used for processing services initiated by users in a received coverage range through a base station; identifying the deployment position of each edge data center in the mobile transmission network and the deployment positions of each optical line terminal, each passive optical network unit, each optical amplifier, each optical splitter and each optical network unit in the mobile transmission network in the form of coordinates based on the mathematical model; and deploying a corresponding edge datacenter at a position for deploying the edge data center in the mobile transmission network. By adopting the method, the service delay is reduced, and the network service quality is improved.

An optical-coax unit (OCU) includes an optical PHY to receive and transmit optical signals and a coax PHY to receive and transmit coax signals. The OCU also includes a media-independent interface to provide a first continuous bitstream from the optical PHY to the coax PHY and a second continuous bitstream from the coax PHY to the optical PHY. The first continuous bitstream corresponds to received optical signals and transmitted coax signals, and the second continuous bitstream corresponds to received coax signals and transmitted optical signals.

A communications network having two complementary optical networks each connectable to a headend, each optical network comprising a plurality of periodic interleaving filters serially connected by optical waveguides such that an output port of one periodic interleaving filter is couple to an input port of another periodic interleaving filter, and wherein an input or output node of the network is formed by a non-serially connected input or output port of a periodic interleaving filter.

The invention relates to a PTN-OTN hybrid networking method and an optical transport network architecture. The method includes the steps: deploying an OTN device node at a core layer of the optical transport network, wherein the OTN device node deployed at the core layer gradually sinks to an convergence layer of the optical transport network as the bandwidth demand increases; selecting some nodesat the convergence layer as core nodes, and deploying the OTN device node and a PTN device node simultaneously at the selected core nodes; deploying the PTN device node at an access layer of the optical transport network, and enabling a communication device accessing to the access layer to access the core layer after being aggregated by the convergence layer. Through the solution of the invention, the method can improve the bandwidth capability of the aggregation layer and the service carrying efficiency.

A first multi protocol label switching (MPLS) enabled Internet Protocol (IP) data network is able to transmit data to a second MPLS enabled IP network via a legacy optical network, which would not otherwise be able to handle the user network interface (UNI) protocols required to be used within an MPLS network environment, by means of configuring the legacy optical network and its traditional network management system (TNMS) so that they simulate or emulate an MPLS enabled optical network. The simulation / emulation of an MPLS network is performed as follows: when a first legacy network element (NE) receives a connection request (a UNI request) from the MPLS network under a UNI protocol, the UNI request is passed to the TNMS, which then sets the required connection across the legacy network via a second edge NE to an NE of the second IP network. Once the connection has been set, the TNMS instructs the edge NE to send a return signal to the requesting network indicating that the connection has been successfully set. Data packets may then be transmitted across the network.

Circuitry of a hybrid fiber-coaxial network may comprise a first transceiver configured to connect the circuitry to an optical link, a second transceiver configured to connect the circuitry to an electrical link, a first processing path, a second processing path, and a switching circuit. In a first configuration, the switching circuit may couple the first transceiver to the second transceiver via the first processing path. In a second configuration, the switching circuit may couple the first transceiver to the second transceiver via the second processing path. The first transceiver may comprise a passive optical network (PON) transceiver and the second transceiver may comprise a data over coaxial service interface specification (DOCSIS) physical layer transceiver. The switching circuit may be configured based on the type of headend to which the circuitry is connected.

An embodiment of the invention discloses a communication method, device and system in a data center, provides novel photoelectric hybrid routing data center networking architecture, provides a distributed source routing technology based on a server in the data center, and shares the load of a switch. Besides, in the data center networking architecture, optical cross equipment is provided to be interconnected with an access switch or a convergence switch, and different routing strategies are carried out for different types of data streams, so that the network transmission efficiency is improved, and the energy consumption of the data center is reduced.

A system for communicating wireless signals includes a passive optical network (PON) between a central office (CO) and network subscribers. The CO has an optical line terminal (OLT) and a wireless base station. An RF / Optic converter converts base station radio frequency (RF) signals to and from corresponding optical signals. An optical combiner combines signals of the OLT and signals of the RF / Optic converter for communication over the PON with at least one optical network unit (ONU) at a location of one or more of the network subscribers, so that signals of the OLT and converted wireless base station signals are carried together over the PON. A fiber mounted wireless antenna unit (FMCA) having an optical interface and a wireless antenna, and communicating wireless signals of the wireless antenna with the ONU, including performing conversions between wireless RF signals and optical signals.

A system is provided for identifying signal propagation information. The system includes at least one component configured to receive an optical input signal and to emit an optical output signal. The emitted optical output signal is representative of the optical input signal, and is associated with characteristic information indicative of the component. A processor is also included, the processor being configured to sense the optical output signal and correlate the characteristic information with said component.

An optical network configuration (12) for transmitting optical signals is described. The optical network configuration (12) comprises an entry point (15) for coupling the optical network configuration (12) to another network configuration (11, 13), and an optical trail (16) for transmitting data signals within the optical network configuration (12). The entry point (15) comprises an optical filter (23) for coupling the other network configuration (11) and the optical trail (16).

An optical repeater which includes a wavelength converter and a bit rate converter. The wavelength converter converts a wavelength of an optical signal from a first optical network to a wavelength of a second optical network. The bit rate converter converts a bit rate of the optical signal from the first optical network to a bit rate of the second optical network. The optical repeater transmits the optical signal from the first optical network to the second optical network at the converted bit rate and wavelength.

The invention discloses a communication system, related equipment and a method. The communication system comprises CO equipment and a plurality of RRHs, the plurality of RRHs form a ring network through optical fibers, and the CO equipment is connected to the ring network; the CO equipment is used for modulating a baseband signal to N first optical carriers generated by the CO equipment to obtain N second optical carriers; the plurality of RRHs are used for receiving N second optical carriers and transmitting the N second optical carriers to the ring network through a first optical fiber, and any one of the plurality of RRHs is used for acquiring a target optical carrier from the received second optical carriers; and converting the target optical carrier into an electric signal, and transmitting the electric signal as a downlink signal. According to the embodiment of the invention, the all-optical communication system is realized through the layout of the optical devices on the architecture and the optical ring network topology mode, and the communication system has a self-healing protection function.

An optical-coax unit (OCU) includes an optical PHY to receive and transmit optical signals and a coax PHY to receive and transmit coax signals. The OCU also includes a media-independent interface to provide a first continuous bitstream from the optical PHY to the coax PHY and a second continuous bitstream from the coax PHY to the optical PHY. The first continuous bitstream corresponds to received optical signals and transmitted coax signals, and the second continuous bitstream corresponds to received coax signals and transmitted optical signals.

Embodiments related to configurable Media Access Controllers (MACs) are described and depicted.

A system is provided for identifying signal propagation information. The system includes at least one component configured to receive an optical input signal and to emit an optical output signal. The emitted optical output signal is representative of the optical input signal, and is associated with characteristic information indicative of the component. A processor is also included, the processor being configured to sense the optical output signal and correlate the characteristic information with said component.