Utilizing A Plurality Of Atm Networks (e.g., Mpoa, Sonet, Or Sdh) Patents (Class 370/395.51)
  • Patent number: 10547920
    Abstract: A method and an apparatus for establishing a transmission path for exchanging an optical signal, where a gate device is disposed in front of an optical switch matrix, where the optical signal reaches the optical switch matrix through the gate device. A working state of the gate device and a working state of a first optical switch used for transmitting the optical signal in the optical switch matrix are adjusted in a time sequence such that when a transmission path used for transmitting the optical signal in the optical switch matrix is established, dynamic crosstalk can be reduced, and communication quality is improved.
    Type: Grant
    Filed: October 27, 2017
    Date of Patent: January 28, 2020
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventor: Xiaoling Yang
  • Patent number: 10404447
    Abstract: A clock recovery device recovers frequency and timing information from an incoming packet stream over asynchronous packet networks. A phase locked loop (PLL) block has predefined states and includes a type II PLL. One of the states involves type II PLL operation. A state machine controller for controls the transition between the predefined states in response to changes in the incoming packet stream. A controlled oscillator is responsive to the PLL block to generate an output signal.
    Type: Grant
    Filed: August 8, 2018
    Date of Patent: September 3, 2019
    Assignee: MICROSEMI SEMICONDUCTOR ULC
    Inventors: Tariq Haddad, Xihao Li, Robert Friesen
  • Patent number: 9998298
    Abstract: Disclosed is a data transmission method. When it is determined that a transmitting end device and a receiving end device both support a link binding capability, a binding group is established; when data is selected to be transmitted by a binding link in the binding group, the data to be transmitted is encapsulated according to a binding data format and is transmitted through the binding link; and when data is selected to be transmitted by a non-binding link, the data to be transmitted is encapsulated according to a common data format and is transmitted through the non-binding link. Also disclosed are a data transmission apparatus and a computer storage medium.
    Type: Grant
    Filed: April 16, 2014
    Date of Patent: June 12, 2018
    Assignee: ZTE CORPORATION
    Inventors: Qiongwen Liang, Lin Wang, Liquan Yuan, Weiliang Zhang, Junjian Zhang
  • Patent number: 9871622
    Abstract: A method for improving the resilience of a communication channel (such as an optical communication channel) to correlated errors (e.g., burst errors), the channel is being formed by a time-multiplexed aggregation of a plurality of lower rate constituent lanes and employs a Forward Error-Correction (FEC) mechanism for forming codewords from data carried by the constituent lanes. Accordingly, the distribution of errors among the codewords is modified by introducing, at the transmitter side, specific delays to the transmission times via the constituent lanes, relative to each other.
    Type: Grant
    Filed: March 19, 2015
    Date of Patent: January 16, 2018
    Assignee: Multiphy Ltd.
    Inventors: Omri Levy, Udi Barzilai
  • Patent number: 9521095
    Abstract: It is provided a transport apparatus including: a port information management unit for obtaining port information which includes a type first interfaces, a transport rate of first interfaces, and a physical lane count from the first interfaces into the transport apparatus, and for determining, based on the obtained port information, a virtual lane count into which the physical lanes from the first interfaces are converted; virtual lane creating units for setting as many virtual lanes as the determined virtual lane count; a lane information creating unit for creating, based on the port information, lane information which associates the first interfaces, the physical lane count, and identification information of virtual lanes in association with the physical lanes; and a multiplexing unit for multiplexing data that is transported along the virtual lanes, and for inserting the lane information in an invalid data field which is generated when the data is multiplexed.
    Type: Grant
    Filed: March 6, 2015
    Date of Patent: December 13, 2016
    Assignee: Hitachi, Ltd.
    Inventors: Masashi Kono, Satoshi Tsutsumi, Hidehiro Toyoda
  • Patent number: 9496960
    Abstract: Integrated performance monitoring (PM); optical layer operations, administration, maintenance, and provisioning (OAM&P); alarming; amplification, and the like is described in optical transceivers, such as multi-source agreement (MSA)-defined modules. A pluggable optical transceiver defined by an MSA agreement can include advanced integrated functions for carrier-grade operation which preserves the existing MSA specifications allowing the pluggable optical transceiver to operate with any compliant MSA host device with advanced features and functionality, such as Forward Error Correction (FEC), framing, and OAM&P directly on the pluggable optical transceiver. The advanced integrated can be implemented by the pluggable optical transceiver separate and independent from the host device.
    Type: Grant
    Filed: September 15, 2015
    Date of Patent: November 15, 2016
    Assignee: Menara Networks, Inc.
    Inventors: Siraj Nour El-Ahmadi, Salam El Ahmadi, Adam R. Hotchkiss, Gabriel E. Cardona
  • Patent number: 9407458
    Abstract: An exemplary method and apparatus are provided for transmitting an asynchronous transport signal over an optical fiber section of an Optical Transport Network. Higher order Optical Data Units of an asynchronous transport signal to be transmitted may be encapsulated into outer transport frames that offer a payload rate higher than a nominal bit rate of the asynchronous transport signal. An output optical signal, which contains the outer transport frames with the encapsulated asynchronous transport signal, is generated at a locally generated clock rate and transmitted over an optical fiber section. To encapsulate the asynchronous transport signal, its bit rate is adapted to the payload rate of the outer transport frames, which is derived from the locally generated clock through a justification and stuffing process. The rate adapted transport signal is then synchronously mapped into the outer transport frames at the rate of the locally generated clock.
    Type: Grant
    Filed: November 22, 2013
    Date of Patent: August 2, 2016
    Assignee: Alcatel Lucent
    Inventors: Klaus-Dieter Fritschi, Gerhard Meyer, Jurgen Rahn, Wolfgang Thomas
  • Patent number: 9344210
    Abstract: A method, a controller, and an Optical Transport Network (OTN) network include provisioning an end-to-end path with a defined committed information rate (CIR) and a peak information rate (PIR) via an optical control plane; computing a path for the end-to-end path based on the CIR and the PIR; configuring the end-to-end path on the computed path at an Optical Channel Data Unit (ODU) data rate supporting the PIR if the computed path can support the PIR or at the ODU data rate supporting the CIR if the computed path can support the CIR and not the PIR; and adjusting the ODU data rate of the end-to-end path based on a rate adjustment requirement in the OTN network and based on the CIR and the PIR.
    Type: Grant
    Filed: February 10, 2014
    Date of Patent: May 17, 2016
    Assignee: Ciena Corporation
    Inventors: Jeffrey Scott Moynihan, Matthew W. Connolly
  • Patent number: 9160654
    Abstract: Routers split and share routing information among several routers within a group of routers acting as a single border router in an Internet protocol (IP) network, each router comprising a routing table. A router of the group selects routes in the routing table of the router; requests other routers of the group to replace, in their routing tables, each selected route with the router as next hop; associates parts of-non selected routes, each one with another router of the group; and removes and replaces, in the routing table, each-non selected route associated with a router of the group by the associated router as next hop.
    Type: Grant
    Filed: January 9, 2013
    Date of Patent: October 13, 2015
    Assignee: International Business Machines Corporation
    Inventors: Jean-Claude Dispensa, Amaud Lund
  • Patent number: 9077477
    Abstract: A continuous-mode wavelength converting apparatus, a burst-mode wavelength converting apparatus, a remote termination apparatus and a central office termination apparatus for converting a burst-mode upstream wavelength signal into a continuous-mode upstream wavelength signal, and thereby transmitting the signal to a long distance and increasing link capacity. The continuous-mode wavelength converting apparatus may convert a received burst-mode upstream electric signal into a continuous-mode upstream electric signal by inserting a first frame at the front of the signal as an indicator of a start of the signal, inserting a second frame at the end of the burst-mode upstream electric signal as an indicator of an end of the signal, and inserting an idle signal into at least one remaining region of the burst-mode upstream electric signal.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: July 7, 2015
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Kwang-Ok Kim, Han-Hyub Lee, Sang-Soo Lee
  • Patent number: 9030924
    Abstract: The present application provides a method for time division multiplex service protection. The method includes: on an OLT in a passive optical network, a working uplink port and a protection uplink port are set for a time division multiplex service and a protection group is created for the working uplink port and the protection uplink port; when a service flow protection for the time division multiplex service is triggered, the time division multiplex service flow is switched from the working uplink port to the protection uplink port, therefore realizing the protection for the time division multiplex service flow. The present application provides an uplink channel protection mechanism for important services in an access system, such as the time division multiplex service, which needs no protection switching protocol, and makes the service recovery time stand within 50 ms, thereby realizing fast and nondestructive recovery of the time division multiplex service.
    Type: Grant
    Filed: December 9, 2009
    Date of Patent: May 12, 2015
    Assignee: ZTE Corporation
    Inventors: Ruichun Dai, Dezhi Zhang
  • Patent number: 8824504
    Abstract: A packet add/drop multiplexer and a data transmission method of a packet add/drop multiplexer are provided. The packet add/drop multiplexer includes: a line interface unit including a first line interface and a second line interface; a scheduling unit, configured to schedule a data frame of an input transporting side and send a data frame of an output transporting side through the second line interface; a branch unit, configured to encapsulate received data to a third Transmission Container (T-CONT) data packet and send the third T-CONT data packet to the scheduling unit, or decapsulate a first T-CONT data packet sent by the scheduling unit to recover data.
    Type: Grant
    Filed: February 18, 2011
    Date of Patent: September 2, 2014
    Assignee: Huawei Technologies Co., Ltd.
    Inventor: Shimin Zou
  • Patent number: 8767748
    Abstract: A signal distribution circuit includes: first to n-th input lines on which first to n-th signals are respectively input; first to (n?1)th selectors each of which selects one of two inputs under the control of a select signal; and a first output line on which the first signal is output and second to n-th output lines on which output signals of the first to (n?1)th selectors are respectively output, wherein: the first and second inputs of the first selector are supplied with the first signal and the second signal, respectively, the first and second inputs of the i-th selector (i is an integer between 2 and (n?1)) are supplied with the output signal of the (i?1)th selector and the (i+1)th signal, respectively, and any of the selectors, when selected by the select signal, selects the second input and, when not selected by the select signal, selects the first input.
    Type: Grant
    Filed: August 29, 2011
    Date of Patent: July 1, 2014
    Assignee: Fujitsu Limited
    Inventors: Masafumi Ohta, Hiromichi Makishima, Hiroyuki Honma
  • Patent number: 8755695
    Abstract: A burst transmission method and a receiver resetting method and apparatus in a Passive Optical Network (PON) are provided. A burst receiver resetting method in a PON includes: receiving a preamble sequence and synchronizing data; after synchronizing the data, continuing to receive the data, and matching a Burst Terminator (BT); and resetting a receiver after successfully matching the BT. Meanwhile, an apparatus for implementing the method and a corresponding burst data transmission method are provided. By using the burst receiver resetting method and apparatus in the PON and the corresponding burst transmission method at an Optical Network Unit (ONU) burst transmission end, a Reach Extender (RE) does not need to unpack upstream burst bandwidth allocation information carried in downstream data.
    Type: Grant
    Filed: September 25, 2013
    Date of Patent: June 17, 2014
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Jing Li, Dongning Feng, Dongyu Geng, Frank Effenberger
  • Patent number: 8718069
    Abstract: A transmission apparatus that receives plural packets and transmits a frame of a synchronous network, includes a multiplexing part that divides, in segment units, the plural packets, each segment having a predetermined length, and multiplexes the segments to generate a data stream signal; a transmitting part that transmits the data stream signal to a mapping part; and the mapping part that maps the data stream signal in the frame of the synchronous network.
    Type: Grant
    Filed: September 8, 2010
    Date of Patent: May 6, 2014
    Assignee: Fujitsu Limited
    Inventor: Haruhiko Hashimoto
  • Patent number: 8711882
    Abstract: Reframing circuitry controls communications between a physical layer device and a link layer device. In a first direction of communication, the reframing circuitry receives a container frame with the container frame having a first arrangement of columns, and outputs a virtual container frame that includes a modified version of the container frame received by the reframing circuitry, with the modified version of the container frame having a second arrangement of columns different than the first arrangement of columns. For example, the reframing circuitry in generating the modified version of the container frame may remove a path overhead column of the container frame and replace that path overhead column with a stuff column in the modified version of the container frame. The virtual container frame may be configured to include the path overhead column that was removed from the container frame in generating the modified version of the container frame.
    Type: Grant
    Filed: December 23, 2011
    Date of Patent: April 29, 2014
    Assignee: LSI Corporation
    Inventors: Tao Wang, Yifan Lin, Lin Sun, Hao Li
  • Patent number: 8705570
    Abstract: A communication device includes a control signal generating unit to generate a control signal for each of a plurality of second frames, and a mapping unit to map a payload signal of the plurality of second frames in a payload area of a first frame, and map at least some of the control signals generated by the control signal generating unit in a control signal area of the first frame.
    Type: Grant
    Filed: December 16, 2010
    Date of Patent: April 22, 2014
    Assignee: Fujitsu Limited
    Inventors: Tetsuya Uchida, Takashi Kuwabara
  • Patent number: 8699499
    Abstract: Methods and apparatus to provision cloud computing network elements are disclosed. A disclosed example method includes receiving a selection of a cloud networking template from a client, wherein the cloud networking template includes a data center connector type and a wide area network connector type, configuring a virtual machine on a host server based on the cloud networking template, configuring a data center connector based on the data center connector type, configuring a wide area network connector based on the wide area network connector type, and coupling the wide area network connector to the data center connector and coupling the data center connector to the virtual machine within the host server to enable the client to access the virtual machine.
    Type: Grant
    Filed: December 8, 2010
    Date of Patent: April 15, 2014
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: John T. Mulligan, David John Knight, Ronnie R. Kulper, Don J. Moloney, Mai-Uyen Thi Nguyen, Han. Q. Nguyen, Diana Lynn Toll-Verry, Simon S. Zelingher
  • Patent number: 8693480
    Abstract: The present invention provides a method, apparatus and system for transmitting and receiving a client signal. The method for transmitting a client signal includes, at the transmitting end, mapping a client signal to be transmitted to a corresponding low-order Optical Channel Data Unit (ODU) in a low-order ODU set, wherein low-order ODUs in the low-order ODU set having rates increased in order, and having rate correspondence relations with the client signals; mapping the low-order ODU to a timeslot of a high-order Optical Channel Payload Unit (OPU) in a high-order OPU set; and adding overheads to the high-order OPU to form an Optical Channel Transport Unit (OTU), and transferring the OTU to an Optical Transport Network (OTN) for transmission.
    Type: Grant
    Filed: March 10, 2010
    Date of Patent: April 8, 2014
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Limin Dong, Qiuyou Wu, Qiwen Zhong, Zhiying Yao, Maarten Vissers
  • Patent number: 8638801
    Abstract: An optical packet switching system includes: an optical packet switching device configured to route and output an input optical packet signal; an optical amplifier device provided in a stage subsequent to the optical packet switching device; and a dummy packet insertion device configured to insert a dummy packet in an optical packet signal prior to input to the optical amplifier device. A dummy packet includes a flag indicating that the packet is a dummy packet.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: January 28, 2014
    Assignee: Fujitsu Telecom Networks Limited
    Inventor: Reiko Sato
  • Patent number: 8634426
    Abstract: When multiple SDH/SONET frame are accumulated and then lower-order path information removed from multiple frames is multiplexed into the same packet to achieve better transmission efficiency during packetization, the delay for accumulating increases. Disclosed is a transmission device that packetizes an SDH/SONET lower-order path with timing which is an integer factor of 1 cycle of the SDH frame. In this case, the destination loads the same multiple lower-order path in one packet. The result is that delay time accompanying lower-order path packetization is kept to less than the time of 1 cycle of the SDH frame, and the efficiency with which lower-order paths are accommodated in packets is further increased. The result is that improved transmission efficiency is realized.
    Type: Grant
    Filed: November 14, 2008
    Date of Patent: January 21, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Yoshio Nogi, Masatoshi Shibasaki, Naohiro Sakakida, Yoshihiro Ashi, Kazutaka Sakai
  • Patent number: 8619769
    Abstract: Packet forwarding systems and methods allow packet-layer transparent, multi-stage packet forwarding among a set of network access points. Packet forwarding across networks utilizing the invention is directly controllable through the upper-layer nodes, e.g. routers, interconnected by such transparent packet forwarding networks. The systems and methods provide packet-layer routing, switching and forwarding look-up-table free and transparent forwarding of label-encapsulated multi-protocol packet traffic among a set of routers. The invention enables flexible and efficient packet multicast and anycast capabilities along with real-time dynamic load balancing and fast packet-level traffic protection rerouting.
    Type: Grant
    Filed: February 20, 2009
    Date of Patent: December 31, 2013
    Inventor: Mark Henrik Sandstrom
  • Patent number: 8611226
    Abstract: A method, apparatus and system for equalizing flows are provided. The method includes: by a relay node, receiving a link setup request of the service flow sent from a source node; acquiring link load information of each bearer network between the source node and a destination node according to the link setup request of the service flow, and selecting a bearer network with a less link load to set up a forwarding link for a service flow; and forwarding the service flow according to the forwarding link. The technical solution provided by the invention implements the equalization of data flows forwarded on networks, and improves the bearer efficiency and transmission efficiency of bearer networks, thus saving the equipment purchase cost and maintenance cost.
    Type: Grant
    Filed: October 29, 2010
    Date of Patent: December 17, 2013
    Assignee: Huawei Technologies Co., Ltd.
    Inventor: Liang Li
  • Patent number: 8582582
    Abstract: A method performed by an optical node, operating as a first network edge device of an optical layer one virtual private network (L1VPN), includes generating, by a first module of the optical node, a first optical data frame, where the first optical data frame includes an L1VPN overhead, and where the L1VPN overhead includes a control plane communication field; generating, by a second module of the optical node, a first control plane message for a second network edge device of the optical L1VPN, where the second network edge device is connected to the first network edge device across a provider network via an optical L1VPN link; incorporating, by the first module, the first control plane message into the control plane communication field of the first optical data frame; and transmitting, by the first module, the first optical data frame to the second network edge device via the optical L1VPN link.
    Type: Grant
    Filed: March 26, 2010
    Date of Patent: November 12, 2013
    Assignee: Infinera Corporation
    Inventors: Radhakrishna Valiveti, Biao Lu
  • Patent number: 8571422
    Abstract: A burst transmission method and a receiver resetting method and apparatus in a Passive Optical Network (PON) are provided. A burst receiver resetting method in a PON includes: receiving a preamble sequence and synchronizing data; after synchronizing the data, continuing to receive the data, and matching a Burst Terminator (BT); and resetting a receiver after successfully matching the BT. Meanwhile, an apparatus for implementing the method and a corresponding burst data transmission method are provided. By using the burst receiver resetting method and apparatus in the PON and the corresponding burst transmission method at an Optical Network Unit (ONU) burst transmission end, a Reach Extender (RE) does not need to unpack upstream burst bandwidth allocation information carried in downstream data. Therefore, the complexity of the implementation of the RE is reduced, and the method is simple and effective.
    Type: Grant
    Filed: August 16, 2011
    Date of Patent: October 29, 2013
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Jing Li, Dongning Feng, Dongyu Geng, Frank Effenberger
  • Patent number: 8571037
    Abstract: An optical digital transmission system of the present invention newly defines one second negative stuff byte in an overhead area for accommodation of the client signals with multiplexing into the OTU frame, newly defines one third positive stuff byte in a corresponding tributary slot in a payload area for accommodation of client signals with multiplexing, newly defines stuff control bits that is used for decision of the use of the second negative stuff byte and the third positive stuff byte in three different places in the overhead area for client signal accommodation with multiplexing, performs control by using the newly defined stuff control bits when accommodation of the client signal with the third positive stuff byte or the second negative stuff byte is required, and performs stuff control without using the newly defined stuff control bits when accommodation of the client signal by the third positive stuff byte and the second negative stuff byte is not required.
    Type: Grant
    Filed: November 13, 2009
    Date of Patent: October 29, 2013
    Assignees: Nippon Telegraph and Telephone Corporation, NTT Electronics Corporation
    Inventors: Shigeki Aisawa, Masahito Tomizawa, Yutaka Miyamoto, Yoshiaki Kisaka, Yasuyuki Endo, Katsuyoshi Miura, Kazuhito Takei
  • Patent number: 8553705
    Abstract: Service providers can reduce multiple overlay networks by creating multiple logical service networks (LSNs) on the same physical or optical fiber network through use of an embodiment of the invention. The LSNs are established by the service provider and can be characterized by traffic type, bandwidth, delay, hop count, guaranteed information rates, and/or restoration priorities. Once established, the LSNs allow the service provider to deliver a variety of services to customers depending on a variety of factors, for example, a customer's traffic specifications. Different traffic specifications are serviced on different LSNs depending on each LSN's characteristics. Such LSNs, once built within a broadband network, can be customized and have its services sold to multiple customers.
    Type: Grant
    Filed: August 8, 2011
    Date of Patent: October 8, 2013
    Assignee: Tellabs San Jose, Inc.
    Inventors: Michael Kazban, Mitri Halabi, Ken Koenig, Vinai Sirkay
  • Patent number: 8532094
    Abstract: A backbone network, comprising a network switch configured to communicate data over Ethernet and SONET/SDH interfaces without encapsulating the data. Also disclosed is a backbone network, comprising a plurality of synchronized network switches, wherein the switches are configured to communicate a plurality of time division multiplexed data streams across at least part of the network via a plurality of Ethernet interfaces and a plurality of SONET/SDH interfaces, and wherein the switches are configured to communicate the data streams without encapsulating the data streams.
    Type: Grant
    Filed: October 12, 2011
    Date of Patent: September 10, 2013
    Assignee: Futurewei Technologies, Inc.
    Inventor: Serge Francois Fourcand
  • Patent number: 8520685
    Abstract: A ROADM device generates link information including a virtual link in which a first link that is used by a node apparatus for transmitting a signal and a second link of a ROADM device that is capable of branching a signal transmitted via the first link when the signal is transmitted via a WDM network are virtually connected each other, and transmits the generated link information.
    Type: Grant
    Filed: January 31, 2007
    Date of Patent: August 27, 2013
    Assignee: Fujitsu Limited
    Inventors: Akira Nagata, Keiji Miyazaki, Shinya Kano, Yasuki Fujii
  • Patent number: 8514897
    Abstract: A method and a device for mapping Ethernet code blocks to an optical transport network (OTN) for transmission is provided. According to a preset mapping manner, four groups of 10 Gigabit (10G) Ethernet code blocks are uniformly mapped to a payload area of a general frame provision (GFP) frame, or each group of 10G Ethernet code blocks is interleaved into the payload area of each row of the OTN frame. Thus, specific solutions for mapping four groups of 10G Ethernet code blocks having an encoding rate smaller than the minimum payload bandwidth of the OPU3 to the OTN for transmission are provided, thereby achieving transparent transmission without changing the mature OTN architecture.
    Type: Grant
    Filed: December 21, 2009
    Date of Patent: August 20, 2013
    Assignee: Huawei Technologies Co., Ltd.
    Inventor: Zhangzhen Jiang
  • Patent number: 8509243
    Abstract: A method and a device for sending a packet based on Tunneling Protocol used in Layer 2 are provided. Specifically, when a traffic flow needs to be sent from a network side to a client via QinQ termination equipment in which the tunneling protocol used in Layer 2 is used, forwarding address information corresponding to the client is obtained by searching a Dynamic Host Configuration Protocol (DHCP) snooping binding table according to Internet Protocol (IP) address information of the client in a packet of the traffic flow. The packet of the traffic flow can be sent to the client according to the obtained forwarding address information.
    Type: Grant
    Filed: July 12, 2010
    Date of Patent: August 13, 2013
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Rongwei Gu, Xingguo Sun
  • Patent number: 8493982
    Abstract: The invention relates to a method to discover Optical Network Units (ONU) with different speed capabilities in an Ethernet Passive Optical Network (EPON) by an Optical Line Termination (OLT), where logical links in the network are identified by Logical Link IDs, and the OLT can transmit and receive data with 1 Gbit/s-speed (1 G) and 10 Gbit/s-speed (10 G), and the discovery process is handled in the OLT by a Multi Point Control Process (MPCP), which exchanges messages as Data Units (MPCPDU) with the ONUs. This is achieved by extending the standard MPCPDUs in a way, that backward compatability is assured.
    Type: Grant
    Filed: May 5, 2009
    Date of Patent: July 23, 2013
    Assignee: Adtran GmbH
    Inventors: Nuno Borges, Marek Hajduczenia, Paulo Miguel Monteiro, Henrique Silva
  • Patent number: 8446906
    Abstract: A method includes receiving client data; extracting overhead data from the client data; mapping the client data into one or more frames, where each of the one or more frames has a frame payload section and a frame overhead section, where the client data is mapped into the frame payload section of the one or more frames; inserting the overhead data into the frame overhead section of the one or more frames; transporting the one or more frames across a network; extracting the overhead data from the frame overhead section of the one or more frames; recovering the client data from the one or more frames; inserting the extracted overhead data into the recovered client data to create modified client data; and outputting the modified client data.
    Type: Grant
    Filed: July 1, 2009
    Date of Patent: May 21, 2013
    Assignee: Infinera Corporation
    Inventors: Edward E. Sprague, Radhakrishna Valiveti, Jan Bialkowski, Ting-Kuang Chiang, Biao Lu, Rajan Rao, Parthiban Kandappan
  • Patent number: 8432921
    Abstract: A forwarding node decapsulates and encapsulates data. The decapsulation may be performed using pattern matching techniques and the encapsulation may be performed using pattern insertion techniques. The decapsulation and encapsulation are preferably performed by hardware devices such as application specific integrated circuits (ASICs) to enhance the speed of such operations. The decapsulation and encapsulation may be independent of each other and performed on a per virtual circuit basis.
    Type: Grant
    Filed: August 26, 2010
    Date of Patent: April 30, 2013
    Assignee: Juniper Networks, Inc.
    Inventors: Steven R. Willis, Gregg F. Bromley, Eric S. Crawley, Frank Kastenholz
  • Patent number: 8428069
    Abstract: Systems, methods, devices, and network architectures are disclosed for creating and implementing secure wireless, wired, and/or optical stealth-enabled networks using specially modified packets, cells, frames, and/or other “stealth” information structures. This enables stealth packets to have a low probability of detection, a low probability of interception, and a low probability of interpretation. Stealth packets are only detected, intercepted, and correctly interpreted by stealth-enabled network equipment. In its simplest form, stealth packet switching modifies the packet structure, protocols, timing, synchronization, and other elements through various rule-violations. This creates stealth packets, which normal equipment cannot receive correctly, and hence normal equipment discards the stealth packets. Stealth packets may be further enhanced with encryption techniques which focus on encrypting the packet structure itself, as opposed to merely encrypting the data.
    Type: Grant
    Filed: November 10, 2004
    Date of Patent: April 23, 2013
    Inventor: Wayne Richard Howe
  • Patent number: 8401010
    Abstract: A backbone network, comprising a first switch comprising a first port configured to communicate a data stream via an Ethernet interface, and a second port configured to communicate the data stream via a SONET/SDH interface, and a second switch comprising a third port configured to receive the data stream from the first switch via the Ethernet interface, wherein the first switch and the second switch are synchronized.
    Type: Grant
    Filed: January 21, 2010
    Date of Patent: March 19, 2013
    Assignee: Futurewei Technologies, Inc.
    Inventor: Serge Francois Fourcand
  • Patent number: 8374186
    Abstract: The present invention provides a method, apparatus and system for transmitting and receiving a client signal. The method for transmitting a client signal includes, at the transmitting end, mapping a client signal to be transmitted to a corresponding low-order Optical Channel Data Unit (ODU) in a low-order ODU set, wherein low-order ODUs in the low-order ODU set having rates increased in order, and having rate correspondence relations with the client signals; mapping the low-order ODU to a timeslot of a high-order Optical Channel Payload Unit (OPU) in a high-order OPU set; and adding overheads to the high-order OPU to form an Optical Channel Transport Unit (OTU), and transferring the OTU to an Optical Transport Network (OTN) for transmission.
    Type: Grant
    Filed: November 14, 2011
    Date of Patent: February 12, 2013
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Limin Dong, Qiuyou Wu, Qiwen Zhong, Zhiying Yao, Maarten Vissers
  • Patent number: 8351436
    Abstract: Provided are an apparatus and method for efficiently and dynamically allocating a bandwidth on a Time Division Multiple Access-based Passive Optical Network (TDMA PON).
    Type: Grant
    Filed: August 19, 2008
    Date of Patent: January 8, 2013
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Bin-yeong Yoon, Man-soo Han, Sung-chang Kim, Hark Yoo, Dong-soo Lee, Jong-deog Kim, Kyeong-hwan Doo, Yong-tae Kim, Kwang-ok Kim, Bong-kyu Kim, Geun-yong Kim, Sung-hoon Kwak, Mun-seob Lee, Le Quan
  • Patent number: 8335235
    Abstract: One embodiment provides a media access control (MAC) module facilitating operations of an Ethernet passive optical network (EPON). The MAC module includes a frame formatter configured to generate a MAC control frame. The generated MAC control frame includes at least one of: an organizationally unique identifier (OUI) field, an OUI-specific operation code (opcode) field, and a number of fields associated with the OUI-specific opcode. Transmission of the MAC control frame facilitates realization of an EPON function based on the fields associated with the OUI-specific opcode.
    Type: Grant
    Filed: March 16, 2010
    Date of Patent: December 18, 2012
    Assignee: Broadcom Corporation
    Inventors: Lawrence D. Davis, Glen Kramer, Jaroslaw Wojtowicz, Ryan E. Hirth, Edward W. Boyd
  • Patent number: 8331379
    Abstract: The present disclosure relates to the Passive Optical Network (PON) technology, and a method for sending an upstream transfer frame in a PON is provided, so as to improve flexibility of a system and satisfy a requirement that an error probability is reduced as low as possible. The method includes: after success of link, sending a preamble according to an allocated time slot, sending a burst synchronization delimiter, and then sending successively a burst header, a Gigabit-Capable Passive Optical Network (GPON) Transmission Convergence (GTC) frame header, and GTC frame data. In the sent synchronization delimiter, the number of non-zeros is the same as the number of zeros, and in a delimiter sequence, the number of non-zeros on odd bits is equal to the number of zeros on even bits, and the number of non-zeros on even bits is equal to the number of zeros on odd bits.
    Type: Grant
    Filed: October 10, 2011
    Date of Patent: December 11, 2012
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Dongning Feng, Dongyu Geng, Jing Li, Wai Kong Raymond Leung, Frank Effenberger
  • Patent number: 8300527
    Abstract: One embodiment of the present invention provides a system that facilitates dynamic allocation of upstream bandwidth in a passive optical network which includes a central node and at least one remote node. Each remote node is coupled to at least one logical entity, which corresponds to a device or a user, that transmits upstream data to the central node and receives downstream data from the central node. The central node is coupled to an external network outside of the passive optical network through a shared out-going uplink.
    Type: Grant
    Filed: May 17, 2010
    Date of Patent: October 30, 2012
    Assignee: Broadcom Corporation
    Inventors: John Ferdinand Sisto, Edward Wayne Boyd
  • Patent number: 8289962
    Abstract: A backbone network, comprising a first switch comprising a first port configured to communicate a data stream via an Ethernet interface, and a second port configured to communicate the data stream via a SONET/SDH interface, and a second switch comprising a third port configured to receive the data stream from the first switch via the Ethernet interface, wherein the first switch and the second switch are synchronized.
    Type: Grant
    Filed: January 21, 2010
    Date of Patent: October 16, 2012
    Assignee: Futurewei Technologies, Inc.
    Inventor: Serge Francois Fourcand
  • Patent number: 8279879
    Abstract: A chunk format for a large-scale, high data throughput router includes a preamble that allows each individual chunk to have clock and data recovery performed before the chunk data is retrieved. The format includes a chunk header that contains information specific to the entire chunk. A chunk according to the present format can contain multiple packet segments, with each segment having its own packet header for packet-specific information. The format provides for a scrambler seed which allows scrambling the data to achieve a favorable zero and one balance as well as minimal run lengths. There can be a random choice of available scrambler seeds for any particular chunk to avoid malicious forcing of zero and one patterns or run lengths of bit zeroes and ones. There are a chunk cyclical redundancy check (CRC) as well as forward error correction (FEC) bytes to detect and/or correct any errors and also to insure a high degree of data and control integrity.
    Type: Grant
    Filed: September 21, 2009
    Date of Patent: October 2, 2012
    Assignee: Foundry Networks, LLC
    Inventors: Tony M. Brewer, Harry C. Blackmon, Chris Davies, Harold W. Dozier, Thomas C. McDermott, III, Steven J. Wallach, Dean E. Walker, Lou Yeh
  • Patent number: 8259734
    Abstract: The present invention relates to the Passive Optical Network (PON) technology, and a method for sending an upstream transfer frame in a PON is provided, so as to improve flexibility of a system and satisfy a requirement that an error probability is reduced as low as possible. The method includes: after success of link, sending a preamble according to an allocated time slot, sending a burst synchronization delimiter, and then sending successively a burst header, a Gigabit-Capable Passive Optical Network (GPON) Transmission Convergence (GTC) frame header, and GTC frame data.
    Type: Grant
    Filed: August 26, 2011
    Date of Patent: September 4, 2012
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Dongning Feng, Dongyu Geng, Jing Li, Wai Kong Raymond Leung, Frank Effenberger
  • Patent number: 8259733
    Abstract: The present disclosure provides systems and methods for rapid circuit provisioning in Optical Transport Networks (OTN) using signaling and routing protocols thereby enabling fast mesh restoration. The present invention utilizes a shim layer between OTN messaging (e.g., GCC or High-Level Data Link Control (HDLC)) and the associated signaling and routing protocol (e.g., OSRP, GMPLS, etc.). If an ODUk Connection CTP or TTP needs to be created, the shim layer runs a fast “OTN Setup” protocol, while buffering out going OTN messages. Incoming messages are still processed and do not require additional buffering. The purpose of the OTN Setup protocol is to allow the OTUk to re-frame on its client ODUk, while buffering out-going messages. When re-framing completes, buffers are released and the OTN messaging resumes without dropping any of the signaling frames.
    Type: Grant
    Filed: April 27, 2009
    Date of Patent: September 4, 2012
    Assignee: Ciena Corporation
    Inventors: Richard W. Conklin, Matthew Connolly, Vagish Madrahalli
  • Patent number: 8238348
    Abstract: A frame transmitting apparatus that transmits a frame via a synchronous digital hierarch network or a synchronous optical network, includes a data-amount detecting unit that detects an amount of data received from other apparatus; and a frame transmitting unit that transmits, when the amount of data detected by the data-amount detecting unit exceeds a predetermined threshold value, a frame in which information pertaining to a frame control is stored in a fixed stuff of a virtual container frame or a synchronous-transport-signal frame.
    Type: Grant
    Filed: February 28, 2005
    Date of Patent: August 7, 2012
    Assignee: Fujitsu Limited
    Inventors: Motoshi Hamasaki, Satoshi Miyazaki
  • Patent number: 8228958
    Abstract: A ring network element and the ring network architectures it enables. According to one embodiment of the invention, a single network element includes a full TDM cross-connect and a multiple ring unit. The full TDM cross-connect is coupled to very line card slot in the single network element with the same amount of bandwidth connection. In addition, the full TDM cross-connect is programmable on an STS-1 basis. The multiple ring unit allows for the simultaneous support of multiple TDM rings.
    Type: Grant
    Filed: October 20, 2006
    Date of Patent: July 24, 2012
    Assignee: Ericsson AB
    Inventors: David R. Stiles, Siegfried Luft, Lawrence Ong, James C. Pang
  • Patent number: 8224971
    Abstract: Techniques are described for providing managed virtual computer networks that have a configured logical network topology with virtual networking devices, such as by a network-accessible configurable network service, with corresponding networking functionality provided for communications between multiple computing nodes of the virtual computer network by emulating functionality that would be provided by the virtual networking devices if they were physically present.
    Type: Grant
    Filed: December 28, 2009
    Date of Patent: July 17, 2012
    Assignee: Amazon Technologies, Inc.
    Inventors: Kevin Christopher Miller, Eric Jason Brandwine, Andrew J. Doane
  • Patent number: 8204085
    Abstract: It is often required to send a plurality of streams of data in parallel between two network nodes in a synchronous transmission network and also to maintain a particular alignment between those streams of data. This is particularly required when the streams of data are to be transmitted over a wide area network, for example, for data mirroring applications. Virtual concatenation is used for each of the individual data streams as known in the art and in addition, the individual virtual concatenation processes are synchronized or co-ordinated. At a destination node it is then possible to realign the individual data streams with respect to one another.
    Type: Grant
    Filed: December 15, 2003
    Date of Patent: June 19, 2012
    Assignee: Ciena Corporation
    Inventors: John Courtney, Mark Matthews, Mark Carson
  • Patent number: 8194684
    Abstract: A network apparatus for a wide area network (WAN) includes a plurality of ports through which a local area network (LAN) and the WAN are connected; an active-port selecting unit that selects an active port from among the ports, and identifies a port other than the active port as a standby port; and a notifying unit that notifies an interface device for the LAN via the standby port that a line connected to the standby port is in a standby mode.
    Type: Grant
    Filed: November 27, 2007
    Date of Patent: June 5, 2012
    Assignee: Fujitsu Limited
    Inventor: Kumiko Uematsu