Abstract: A method for communicating in a passive optical network (PON), includes receiving traffic from a plurality of optical network units (ONUs) transmitting in an upstream transmission channel, wherein each of the ONUs may transmit at any wavelength within a wavelength band associated with the upstream transmission channel. The method also includes dividing the upstream transmission channel into a plurality of sub-channels, that each include a subset of the wavelength band associated with the upstream transmission channel. The method further includes determining the identity of each of the plurality of ONUs transmitting in each of the sub-channels, assigning a plurality of ONUs transmitting in the upstream transmission channel to each of at least two of the sub-channels based on the determination of the ONUs transmitting in that sub-channel, and allocating transmission timeslots for time-shared transmission by the ONUs in one or more of the sub-channels.

Abstract: A content distribution system may include a headend server and media converters, the headend server being configured to distribute content items to user devices via the media converters and gateway devices. Each of the media converters may include a media converter cache and may be coupled to the headend server and a subset of the gateway devices, where each of the user devices is communicatively coupled to one of the gateway devices. The headend server may be further configured to determine one of the content items that is expected to be requested by a group of the user devices, determine one of the media converters that is coupled, via the subset of the gateway devices, to a largest number of user devices in the group of the user devices, and coordinate storing the one of the content items in the media converter cache of the one of the media converters.

Abstract: A method for upstream bandwidth allocation in a passive optical network is provided by the disclosure. The method includes the following steps: an Optical Line Terminal (OLT) allocates an upstream bandwidth for an Optical Network Unit (ONU) through an upstream bandwidth mapping (US BWmap) domain, wherein the total length B of payloads transmitted by consecutive Transmission Containers (T-CONTs) allocated for the ONU is: the product of the positive integer n and the data byte length L contained in a code word when the ONU uses Forward Error Correction (FEC) encoding, minus the byte length R of the contents protected by FEC, except the payloads, in an upstream burst slot transmitted by the ONU, i.e. B=L×n?R bytes (401); and the ONU encapsulates the upstream data according to the size of the T-CONT total bandwidth allocated by the OLT and transmits it to the OLT (402). A system for upstream bandwidth allocation in a passive optical network is also provided by the disclosure.

Abstract: Methods and apparatus for managing an over-the-top data traffic flood using multiple-pipe techniques are provided. For example, provided is a method for routing Internet data including receiving the Internet data at a carrier portal, as well as classifying the Internet data based on criteria specified by the carrier, such as a quantity of payment from at least one of a user of the Internet data to a provider of the Internet data. The classified data is transmitted via one of a plurality of ports, where port selection is based on the classification. Each of the ports in the plurality of ports is coupled to a respective one of a plurality of independent data transport networks and/or separate optical paths. The data transport networks and/or separate optical paths can differ in capacity and/or latency.

Abstract: The present invention relates to a method and devices for fast protection of an optical network system, in particular for a Passive Optical Network (PON), such as a Gigabit-capable Passive Optical Network (GPON). In the method, it is detected that the communication from a first optical network device is lost. Switching of functionality is initiated from a first optical line termination device to a second optical line termination device, and a control message is sent from the second optical line termination device to the first optical network device such that the first optical network device is prevented from moving into initial state. Furthermore, the method comprises determining and setting timing settings for the first optical network device.

Abstract: The system of the present invention includes a plurality of ONTs adapted to provide multiple voice and data related services to different subscribers. Each of the plurality of ONTs comprises at least one receiver adapted to receive optical signals, a de-multiplexer to de-multiplex the optical signal into component signals, at least one transmitter and at least one output port. Further, the system includes a plurality of routers operatively coupled to the each of the plurality of ONTs. Furthermore, the system includes a plurality of subscriber devices communicably coupled to each of the plurality of routers. The subscriber devices are adapted to receive the de-multiplexed component signals routed by the corresponding router and provide data and voice services to the particular subscriber. Each of the ONTs configures separate domains for each of the routers operatively coupled thereto so as to enable sharing of the ONT.

Abstract: Disclosed is a device (1000) for providing power to one or more Optical Network Utilities (NUs) (1100) in an optical network (1300) used to provide communication to a plurality of devices (1400) of subscribers. The device (1000) includes one or more Power over Ethernet (POE) adapters (1200) operatively coupled to the subscriber devices. The POE adapters are configured to derive AC power and data signals from the plurality of devices, and convert the derived AC power into DC signals. Further, the device includes a Power over Ethernet (POE) splitter (1500) operatively coupled to the POE adapters. The POE splitter is configured to split the DC signals from the data signals, and feed the DC signals to the one or more NUs for satisfying their power needs.

Abstract: The present disclosure discloses a method, wherein the method comprises generating a passive optical network (PON) protocol message, wherein the PON protocol message comprises an identifier of a PON user terminal and an action indication indicating that the PON user terminal intends to exercise a first power supply mode that is a power-saving mode. The present disclosure further provides a method for controlling the PON power supply and for reporting the power supply state. The present disclosure allows control of the energy usage of the PON user terminal to save power when a service in the PON user terminal is not used or when the user terminal uses a backup power source to supply power.

Abstract: A modular interconnect includes an mn-by-mn fully connected, direct broadcast, point-to-point, all-to-all interconnect fabric, wherein the mn-by-mn fully connected, direct broadcast, point-to-point, all-to-all interconnect fabric is non-blocking and congestion free, and wherein m is an integer?2 and n is an integer?2. Operating the modular interconnect includes distributing each of mn inputs to each and every one of mn outputs.

Abstract: A system for transporting a plurality of analog and/or digital signals over an optical fiber can include one or more master modems for modulating digital signals and/or RF inserters modulating video signals. The RF signals from the modem(s)/RF inserters are up-converted resulting in frequency bands that are non-overlapping and are spaced apart within a single sub-octave. The sub-octave signal is then converted into an optical signal and directed onto an end of an optical fiber. At the downstream end of the optical fiber, the received optical signal is converted to an RF signal at an optical receiver. The RF signal is then filtered, down-converted and directed to a selected coaxial distribution unit. From the coaxial distribution unit, the RF signal is demodulated, e.g. at a slave modem, to recover the initial analog and/or digital signal.

Abstract: An optical network unit (10) comprising a reflective semi-conductor optical amplifier (R-SOA) 12 and a driver 14. The R-SOA has a large optical confinement factor and is arranged to receive a portion of a downstream optical signal having a signal wavelength and a signal power. The driver is arranged to generate a drive signal 16 to drive the R-SOA. The drive signal is arranged to cause the R-SOA to operate in saturation at the signal power. The drive signal is further arranged to cause the R-SOA to apply a return-to-zero line code to said portion of the downstream optical signal to form an upstream optical signal at the signal wavelength. The drive signal is further arranged to cause the R-SOA to apply a phase modulation to the upstream optical signal.

Abstract: There is provided a communication control device including a communication control processing portion that performs at least one type of communication control processing when a control signal that requests a response signal is received from a partner device, a transmission processing portion that transmits the response signal to the partner device after the processing that the communication control processing portion performs when the control signal is received from the partner device, a processing time measurement portion that measures time that is consumed by the processing by the communication control processing portion, and a processing content setting portion that, based on the measured processing time that has been measured by the processing time measurement portion and on a response processing time for the response to the control signal, sets content of processing that the communication control processing portion will be made to perform within the response processing time.

Abstract: Systems and methods are disclosed to provide an upstream rate between 1 Gbps and 10 Gbps in a cost effective manner in a 10 GEPON. In an embodiment, an optical network unit (ONU) transmitter includes a burst transceiver and a physical layer (PHY) including a high performance digital to analog converter (DAC), a pulse amplitude modulation (PAM) module configured to encode end user data using a modulation scheme having more than two levels, and a laser. The ONU transmitter transmits the encoded end user data to an optical line terminal (OLT) receiver, which demodulates the data using a PAM demodulator and sends it to a service provider.

Abstract: The invention relates to a directionless and colorless reconfigurable optical add/drop multiplexer (ROADM) for a number of clients comprising: an add/drop interface for optical signals of at least one optical network, wherein each received optical signal is split by at least one optical splitter into optical signals which are applied to a downstream cross connector distributing the split optical signals to wavelength selectors of different clients, wherein each wavelength selector performs a wavelength selection of at least one wavelength from the distributed optical signals, wherein an optical signal having a selected wavelength (?) is applied to a client transponder of a client.

Abstract: Example modular optical network terminals (ONTs) and methods to implement the same are disclosed. A disclosed example ONT includes a base unit having an integral optical interface to optically couple the ONT to an optical network, and to convert an optical signal received from the optical network to form an electrical signal, a plug-in service module to distribute the electrical signal within a customer premises, and a modular interface connector configured to receive the plug-in service module and to couple the electrical signal from the base unit to the plug-in service module.

Abstract: Systems and methods are provided for network communication using wireless base stations and an optical orthogonal frequency division multiple access (OFDMA) signal generated on an optical wavelength, with the optical OFDMA signal being composed of a plurality of OFDMA subcarriers. A multi-level modulator modulates each of the plurality of OFDMA subcarriers. A single optical wavelength propagates each of the plurality of OFDMA subcarriers to different base stations; a passive optical splitter delivers the optical OFDMA signal to different base stations; and an OFDMA subcarrier de-multiplexer delivers and extracts traffic for each of the base stations in an electronic-domain, wherein the extracted traffic is remodulated in a wireless signal format. Antennas at each of the base stations transmit wireless signals, and the wireless signals are recovered and processed from the base stations.

Abstract: Systems and methods according to these exemplary embodiments provide for methods and systems that allow for either reducing signal loss or improving the optical signal strength in a PON for increasing optical signal range.

Abstract: An Ethernet passive optical network over coaxial (EPOC) system rate mechanism. A network device is provided that includes a physical layer device (PHY) that is configured for coupling to a coaxial cable, a medium independent interface that facilitates data transmission at 10 Gbit/s or greater, and a reconciliation sublayer that is coupled to the PHY via the medium independent interface. The reconciliation sublayer has a codeword detector that is configured to detect a reserved codeword that is received from the PHY over the medium independent interface. The codeword detector can be configured to forward a rate control signal to a media access control (MAC) based on the detection of the reserved codeword.

Abstract: An example is a bandwidth control method employed in an optical line terminal including: determining a first time point at which a first optical network unit starts the processing of transitioning between the states in a case where the first optical network unit is to be transitioned between the states; transmitting a state control signal containing the first time point to the first optical network unit in order to control the first optical network unit to start the processing of transitioning between the states; and stopping allocating a bandwidth used to transmit a signal to the optical line terminal to a second optical network unit during a period from the first time point until it is determined that the first optical network unit has finished the processing of transitioning between the states.

Abstract: Systems and methods are provided to use of out-of-band (OOB) channels for the transport of network-synchronization signals and network control information. These OOB channels transport synchronization and control channels over low-frequency bands outside of the frequency bands used for the data channels. Locating expensive network-synchronization functions in the optical network unit (ONU) and sharing the derived synchronization signals among multiple downstream customer premises equipment (CPE) devices results in cost savings and provides a means for maintaining a continuous, end-to-end synchronization reference, even during periods when the data channels on the copper network segment are in an energy-efficiency mode (e.g., a low-power and/or sleep mode).

Abstract: Communication between an ONT (1) and a host device (2), which are connected to form a combined ONT-host unit, the communication being associated with an OMCI-configuration of the ONT-host unit. The communication uses a memory of the ONT, and the Host Device (e.g. radio base station) memory is accessible also to the host device, and comprises e.g. a lock registry. The ONT (1) could e.g. be mounted in an SFP, which is plugged into a suitable contact (3) in the host device (2).

Abstract: Embodiments of the invention include a system for registering an optical network unit (ONU) installed in a passive optical network (PON), including a mobile terminal, a registration server, and an optical line terminal (OLT). The mobile terminal is configured to collect an ONU identification from the ONU, collect a subscriber identification, and transmit the ONU identification and the subscriber identification to a registration server via a communication system. The registration server is configured to receive the ONU identification and subscriber identification from the mobile terminal via the communication system, retrieve subscriber information from a subscriber database based on the subscriber identification, associate the ONU with the subscriber information, and transmit, to an optical line terminal, an association between the ONU and the subscriber information. The optical line terminal (OLT) is configured to serve as an endpoint for the ONU in the PON.

Abstract: A method for detecting faults and their locations in an optical path between an optical line terminal (OLT) of and optical network units (ONUs) of a passive optical network (PON). The method comprises forming a maintenance optical link through the PON between the OLT and a collocated ONU, the OLT and its collocated ONU are each connected to an optical splitter; sending a ranging request from the OLT to the collocated ONU; in response to the ranging request, receiving, over the maintenance optical line, a ranging burst signal including at least a fault analysis detection pattern (FADP); and analyzing the FADP in the received signal by auto-correlating the FADP signal with an expected FADP signal, an uncorrelated event measured through the auto-correlation is indicative of a fault in the optical path of the PON and occurrence times of such events are indicative of the fault's location in the optical path.

Abstract: A method for small scale time increased bandwidth assignment to increase optical network unit ONU downstream energy efficiency includes splitting of downstream scheduling cycles into multiple rounds, using selective ones of the multiple rounds as probing rounds and other than said selective ones of the multiple rounds as fixed rounds, the probing rounds and fixed rounds being cooperatively selected for energy efficiency without limitations in length of the downstream scheduling cycles.

Abstract: A system for powering a network element of a fiber optic wide area network is disclosed. When communication data is transferred between a central office (CO) and a subscriber terminal using a network element to convert optical to electrical (O-E) and electrical to optical (E-O) signals between a fiber from the central office and twisted wire pair, coaxial cable or Ethernet cable transmission lines from the subscriber terminal, techniques related to local powering of a network element or drop site by the subscriber terminal or subscriber premise remote powering device are provided. Certain advantages and/or benefits are achieved using the present invention, such as freedom from any requirement for additional meter installations or meter connection charges and does not require a separate power network.

Abstract: A method for accessing a Passive Optical Network (PON) is disclosed. The method includes: obtaining a first distance parameter of an Optical Network Unit (ONU), where the first distance parameter indicates the location of the ONU relative to an Optical Line Termination (OLT); receiving an ONU information request message delivered by the OLT, and returning an ONU information response message to the OLT when a second distance parameter carried in the ONU information request message corresponds to the first distance parameter; and receiving a ranging request message, where the ranging request message is delivered by the OLT according to the ONU information response message, returning a ranging response message as a basis for the OLT to obtain an Equalization Delay (EQD) value of the ONU, and connecting the ONU to the PON according to the EQD value. An ONU, an OLT, and a PON are also disclosed.

Abstract: A network comprising a first optical line terminal (OLT), and a second OLT in communication with the first OLT, at least one first-type optical network unit (ONU), and at least one second-type ONU. Included is an OLT configured to implement a method comprising forwarding a first downstream data from a first-type OLT to at least one first-type ONU, and transmitting a second downstream data to at least one second-type ONU. Also included is a method comprising adding at least one second-type ONU to a passive optical network (PON) comprising a first-type OLT and at least one first-type ONU without removing the first-type OLT from the PON.

Abstract: A method for performing a protection in passive optical networks. The method comprises forming a protection maintenance link between an active optical line terminal (OLT) and a standby OLT; forming a synchronization link between the active OLT and the standby OLT; computing a base differential distance value; continuously measuring round trip time (RTT) values by the active OLT using the protection maintenance link; periodically sending at least RTT values calculated by the active OLT to the standby OLT over the synchronization link; and computing, by the standby OLT, a new RTT value based on at least a RTT value measured by the active OLT and a standby differential distance value, when a switch-over action is triggered, thereby allowing the standby OLT to serve optical network units (ONUs) in the PON without performing a ranging process.

Abstract: Communications method between a main station and processing nodes includes interconnecting the main station and the nodes in an optical path defining adjacent nodes and non-adjacent nodes, operatively grouping the nodes in a plurality of distinct sub-groups, each formed by non-adjacent nodes, at least one of said sub-groups including at least two nodes generating at the main station a multiplexed optical signal propagating along the path for serving the nodes, the multiplexed optical signal including a plurality of optical channel signals having a respective plurality of distinct carrier wavelengths, each carrier wavelength being associated with a respective sub-group of nodes, and serving each node of each sub-group of nodes with a respective portion of the optical channel signal having the associated carrier wavelength.

Abstract: An optical network unit (ONU) accesses services provided by multiple optical line terminals (OLTs) in a wavelength division multiplexing (WDM) passive optical network (PON). The ONU receives downstream signals from a first plurality of OLTs through a designated port of an arrayed waveguide (AWG). At any given time, the bandpass filter module can select any one of a first plurality of AWG cycles allocated to the first plurality of OLTs. Based on received downstream signals, the ONU transmits upstream signals to a second plurality of OLTs through the designated port of the AWG. At any given time, the bandpass filter module and a transmitter of the ONU can select any one of a second plurality of AWG cycles allocated to the second plurality of OLTs. The ONU may be configured with a plurality of receivers and transmitters, whereby it is enabled to simultaneously subscribe to a plurality of AWG cycles.

Abstract: In a PON system in which plural kinds of modulation schemes coexist, when uplink burst signals from respective ONUs are received, the receiving efficiency degrades as the number of the times of switching of the modulation scheme increases. In an optical access (PON) system supporting plural kinds of modulation schemes, an OLT allocates bandwidths for uplink signals, i.e., transmission timings each including a transmission start time and a transmission duration, to ONUs, respectively, such that the bandwidths allocated to plural ONUs for the same modulation scheme are as successive as possible. Based on the transmission timings allocated to the respective ONUs, the OLT switches the modulation scheme of a modulation-scheme variable burst-mode optical transmitter/receiver by control of a modulation scheme controller.

Abstract: A network component comprising at least one processor coupled to a memory and configured to exchange security information using a plurality of attributes in a management entity (ME) in an optical network unit (ONU) via an ONU management control interface (OMCI) channel, wherein the attributes provide security features for the ONU and an optical line terminal (OLT). Also included is an apparatus comprising an ONU configured to couple to an OLT and comprising an OMCI ME, wherein the OMCI ME comprises a plurality of attributes that support a plurality of security features for transmissions between the ONU and the OLT, and wherein the attributes are communicated via an OMCI channel between the ONU and the OLT and provide the security features for the ONU and the OLT.

Abstract: The present invention provides a method: sending a downlink message to an optical network terminal through a first port of an optical line terminal; receiving, from a second port of the optical line terminal, an uplink message returned by the optical network terminal; obtaining a second time of receiving the uplink message, and obtaining a first time when the uplink message reaches the first port; according to the first time and the second time, obtaining an equalized delay from the second port to the optical network terminal; and after the optical line terminal is switched from the first port to the second port, delivering, by the optical line terminal, the equalized delay from the second port, and performing data communication with the optical network terminal through the second port. In the present invention processing time is decreased to a maximum extent, and stability of the system is improved.

Abstract: A method in a network device for providing end-to-end connection in a unified optical and coax network, comprising receiving at an integrated node device (IND) a frame from an optical line terminal (OLT), wherein the frame comprises a data frame and a logical link identifier (LLID), and placing the data in a one of a plurality of buffers based on the LLID, wherein the one of the plurality of buffers corresponds to a customer premises equipment (CPE) associated with the LLID, wherein the data frame stays intact in a media access control (MAC) layer.

Abstract: Provided is an optical network unit saving power. The optical network unit may include a processor checking whether at least one downward physical block, the upward physical block and a data switching block operate in an idle mode, sequentially transiting at least one downward physical block, an upward physical block and a data switching block to a sleep mode according to the checking result and sequentially transiting an optical transmission-reception block and the medium access control block to a sleep mode by judging whether or not a medium access control block transits to a sleep mode.

Abstract: Typical passive optical networks (PONs) employ several optical network terminals (ONTs) connected to an optical line terminal (OLT) via an optical splitter/combiner (OSC). Due to the passive nature of the OSC, determining a port assignment of an ONT may be difficult or impossible. Methods described herein provide for identifying a port in a passive optical network, optionally as corresponding to an ONT. A first subset of the ONTs is caused to transmit a first signal, such as a status signal, with a respective attribute having a first value, and a second subset of the ONTs is caused to transmit a second signal with the respective attribute having a second value. At the OSC, the signals are detected as a function of the attribute and the first and second values. Results of this detection are reported, from which an identification of a port and associated ONT can be determined.

Abstract: A system, method, and computer program product for a flashless optical network unit (ONU) in a Passive Optical Network (PON) are provided herein. The method includes the steps of synchronizing on a downstream signal of an optical line terminal (OLT), receiving a first software from the OLT for its operation on a reserved downstream channel of the OLT, and storing the received first software in a volatile memory. The ONU does not pre-store the first software in a non-volatile memory.

Abstract: In one embodiment, a network server layer provides disjoint channels in response to client-layer disjoint path requests. For example, the network layer can be an optical network, and the client layer may be a packet switching layer (e.g., label switching, Internet Protocol). In one embodiment, a server-layer node receives a client-layer disjoint path request to provide a server-layer channel through a server-layer network. The client-layer disjoint path request includes an identifier corresponding to an existing client-layer path that traverses a current channel through the server-layer network that does not include the server-layer node. The server-layer network determines a particular channel through the server-layer network that is disjoint to the current channel based on route information of the current channel, and then signaling is performed within the server-layer network to establish the particular channel.

Abstract: An embodiment of the invention provides communications services to Optical Network Terminals (ONTs) in a Passive Optical Network (PON) with at least two Optical Line Terminals (OLTs). The role of these OLTs is autonomously governed based on characteristics of upstream signals from the ONTs. When an OLT in a standby mode determines that upstream signal power is below a power threshold, the OLT in standby mode changes its mode and operates in the active mode. An OLT in active mode monitors the upstream signals and determines the number of upstream signals that are misaligned to a respective downstream command sent from the active OLT. When the number of misaligned signals is greater than a counts threshold, the active OLT switches its operation and operates in standby mode. Through autonomous operation, the OLTs provide redundancy for the PON without added control channel complexity.

Abstract: Provided is a passive optical network (PON) providing system of an Ethernet-based packet transport layer (PTL) scheme, including: a connection management server to manage a unified PTL connection overall over the network by establishing a PTL connection between an optical network unit (ONU)/optical network terminal (ONT) of a customer termination of one party and an ONU/ONT of a customer termination of another party, and by applying a PTL-PON scheme to a PON section between the ONU/ONT and an optical line termination (OLT); an OLT to manage a connection of a received packet, and to convert a format of the packet according to a transmission direction of the packet and thereby transmit the packet; and an ONU/ONT becoming an end point of the PTL connection to convert the format of the packet according to the transmission direction of the received packet and to thereby transmit the packet to a customer terminal or the OLT.

Abstract: In general, techniques are described for inline packet replication in network devices. A network device referred to as an optical line terminal (OLT) may implement the techniques. The OLT comprises a customer interface that supports different logical interfaces to which couple a plurality of optical network terminals (ONTs) and a network interface that receives a data unit. The OLT further comprises a conversion unit, such as a media access control (MAC) module, located in a data path of the optical line terminal that determines whether the received data unit is a candidate for replication. The conversion unit includes an inline packet processing module that performs replication to generate at least one copy of the data unit based on the determination that the received packet is a candidate for packet replication. The customer interface outputs the at least one copy of the data unit to the ONTs.

Abstract: A communication system has a plurality of nodes adapted to provide for a communication with one or more devices, a central node, a passive optical network having a multiplexer/demultiplexer device adapted to demultiplex a first optical signal from the central node to the plurality of nodes, and to multiplex second optical signals from one or more of the nodes, each node having allocated a wavelength for generating its optical signal, wherein for directly transmitting signals from one node to at least one of the other nodes, the one node is adapted to generate an optical signal at the wavelength allocated to the at least one of the other nodes, the optical signal including the signal to be transmitted, and wherein the multiplexer/demultiplexer device of the passive optical network is adapted to combine the optical signal from the one node with the first optical signal.

Abstract: The present invention provides an apparatus, in particular an optical network unit, which comprises a first part operably coupled to an arm of an optical fiber network, the first part comprises an optical module including an optical-electric interface and/or an electric-optical interface locked on a preset wavelength band, and an interface module, and at least one second part operably coupled to a network entity of a communication network, each comprising a control unit, a signal processing unit and an interface module. One of the control units of the at least one second part is set by a optical line terminal of the optical fiber network as a master control unit configured to tune and control the optical module of the first part. The first part and the at least one second part are wireless coupled with respect to each other via the interface modules.

Abstract: A coax network unit (CNU) receives downstream bursts from a coax line terminal (CLT) and transmits upstream bursts to the CLT. The downstream bursts include start markers that indicate the beginnings of the downstream bursts and may also include pilot symbols. The downstream bursts are continuous across available resource elements in a matrix of subcarriers and orthogonal frequency-division multiplexing (OFDM) symbols. The available resource elements exclude resource elements in the matrix that carry the pilot symbols. The upstream bursts may include start markers indicating the beginnings of the upstream bursts and end markers indicating the ends of the upstream bursts. Respective upstream bursts are transmitted in respective groups of one or more resource blocks allocated to the CNU.

Abstract: One embodiment relates a method for communicating data using an optical transport network. Multiple sub-rate client data signals are received from client sources. The sub-rate client data signals each have a data rate which is less than a data rate capacity of a lowest-order data unit. A predetermined number of tributary slots are provided in the lowest-order optical channel data unit, and each sub-rate client data signal are mapped to at least one of the tributary slots. Another embodiment relates to an optical data communication server that includes a sub-rate mapper for mapping multiple sub-rate client data streams to a predetermined number of tributary slots. Other embodiments and features are also disclosed.

Abstract: A Data Over Cable Service Interface Specifications (DOCSIS) Passive Optical Network (PON) system (DPON) makes optical subscribers appear as cable subscribers. In one embodiment, a Cable Modem (CM) proxy is located in an Optical Line Termination (OLT). The OLT implements a cable modem protocol stack that operates as the CM proxy and communicates with a back office system. The OLT translates the data retrieved by the CM proxy into Optical Network Unit (ONU) recognizable commands, and sends the translated data to the ONU. In a second embodiment, the CM proxy is located in the ONU. The ONU implements the cable modem protocol stack that operates as the CM proxy and communicates with the back office system. The ONU translates the data retrieved by the CM proxy into ONU recognizable commands and sends the translated data to the ONU.

Abstract: Various embodiments of the present invention disclose a DOCSIS protocol-based access method, apparatus, and system. A first PON physical layer module is disposed inside or outside a CMTS device; the CMTS device receives DOCSIS protocol-based data, converts the DOCSIS protocol-based data into PON physical layer format-based data by using the first PON physical layer module, and sends the PON physical layer format-based data to a CMC through an optical distribution network; and the CMC receives the PON physical layer format-based data, converts the PON physical layer format-based data into DOCSIS physical layer format-based data, and sends the converted data to a terminal device. The solution provided by various embodiments of the present invention is applicable to a DOCSIS system.

Abstract: An optical network unit registration method registers an unregistered optical network unit in a network that includes an optical line terminal having a plurality of optical subscriber units that allocate different wavelengths from one another, and a plurality of optical network units including a variable wavelength filter and configured to connect to the optical line terminal via one or more optical transmission paths. The optical network unit registration method includes a transmitting a wavelength notification signal that indicates a wavelength for the variable wavelength filter to one or more optical network units, a setting a transmission wavelength for the variable wavelength filter based on the wavelength that wavelength notification signal indicates, and a registering an unregistered optical network unit that receives the wavelength notification signal.

Abstract: The present invention relates to a method for negotiating link capability information. The method includes: After a higher order optical channel data unit (ODU) link is established, a second node receives first higher order ODU link capability information supported by a first node at one end of the link, where the second node is located at the other end of the link; determines link capability information according to the first higher order ODU link capability information and second higher order ODU link capability information that is supported by the second node; and sends the link capability information to the first node; or sends the second higher order ODU link capability information to the first node, so that the first node determines the link capability information according to the first higher order ODU link capability information and the second higher order ODU link capability information.

Abstract: The invention facilitates optical signals generated from customer premise equipment (CPE) at the edges of the metro domain networks. The CPEs are connected to extension terminals that transform the optical signal originating at the CPE into a suitable format for long haul transmission. The optical signal then propagates to a primary terminal where the signal is multiplexed with other optical signals from other extension terminals. The multiplexed signals are then transmitted over LH or ULH network to a second primary terminal where the signal is then demultiplexed from other optical signals and transmited to the proper extension terminal. At the extension terminal, the demultiplexed optical signal is transformed from its LH format back into a format suitable for interconnection to a CPE. Using this architecture, the signal under goes optical-to-electrical conversion only at the extension terminals or end points. These end points can be located in lessee's facility.