For Distribution To A Multiplanar Switching Network Patents (Class 370/367)
  • Patent number: 9143901
    Abstract: Various embodiments provide methods and systems for identifying statistically multiplexed groups of services and coordinating the groups of services for multicast or broadcast over the same transmission channels. Further embodiments provide methods and systems for providing quality of service requirements for groups or subgroups of statistically multiplexed services. Coordination of the groups of services for multicast or broadcast over the same transmission channels may be based on the provided quality of service requirements. Various embodiments may identify groups of services and provide associated of service requirements by sending modified session start messages or separate group messages.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: September 22, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Ralph A. Gholmieh, Nagaraju Naik
  • Patent number: 8971352
    Abstract: A physical layer device provides for synchronization of clocks in a communication network. A place holder for an alignment marker is inserted into a frame to be transmitted. Once the placeholder alignment marker is inserted into the frame, no additional data is added to the frame. Transmission of the frame including the placeholder alignment marker may also be delayed to allow data processing in subsequent blocks within a transmit block to complete prior to further processing of the frame including the placeholder alignment marker (e.g., timestamping, MACSec, etc.) to improve timing accuracy with a multi lane distribution environment.
    Type: Grant
    Filed: September 30, 2013
    Date of Patent: March 3, 2015
    Inventor: Thomas Jost
  • Patent number: 8948204
    Abstract: A method for receiving packet data at a communication channel and transmitting the packet data over serial links of the communication channel. The packet data is sliced into n-bit data portions which are concatenated with a header prior to transmitting an n-bit portion across one of the serial links of the communication channel. The header may include an invert bit to alter the majority sign of an n-bit portion. Other aspects of the present invention are also described herein.
    Type: Grant
    Filed: April 12, 2010
    Date of Patent: February 3, 2015
    Assignee: Cisco Technology, Inc.
    Inventors: Neil Sharma, Matthew Todd Lawson, Mick R. Jacobs
  • Patent number: 8724623
    Abstract: A plurality of wireless interfaces and/or internal radios is utilized within a network switching device to enable wireless intra-connectivity within its switch fabric. The wireless intra-connectivity services switching operations in the network switching device, to prevent and/or reduce blocking in the network switching device. The wireless intra-connectivity is also used to enable management and control operations in the network switching device. Operations of the internal radios and/or wireless interfaces are managed to mitigate and/or limit interference among the internal radios and to optimize throughput available via the wireless intra-connectivity. Arbitration, channelization, time multiplexing, and/or directionality techniques, for example, are utilized in the internal radios. External radios are operable to enable cascading plurality of network switching devices.
    Type: Grant
    Filed: November 25, 2008
    Date of Patent: May 13, 2014
    Assignee: Broadcom Corporation
    Inventors: Jeyhan Karaoguz, James D. Bennett
  • Patent number: 8661157
    Abstract: A method and apparatus is provided to discover and integrate applications in an application router framework. The discovery operation includes receiving a registration notification for an application on a network, adding information describing the application to a repository into a data structure and publishing the data structure onto an application router. The association operations include querying one or more application routers on an application network for meta-data and other information on applications, exchanging the meta-data and other information between the application routers and associating the applications together automatically using their respective application protocols.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: February 25, 2014
    Assignee: International Business Machines Corporation
    Inventors: George M. Scott, Nikhyl P. Singhal, Samir G. Mitra
  • Patent number: 8625427
    Abstract: One embodiment of the present invention provides a system that facilitates flow control of multi-path-switched data frames. During operation the system transmits from an ingress edge device data frames destined to an egress edge device across different switched paths based on queue status of a core switching device and queue status of the egress edge device. The egress edge device is separate from the core switching device.
    Type: Grant
    Filed: September 3, 2009
    Date of Patent: January 7, 2014
    Assignee: Brocade Communications Systems, Inc.
    Inventors: John M. Terry, Joseph Juh-En Cheng, Jan Bialkowski
  • Patent number: 8611375
    Abstract: A method of paging a mobile station is provided. The method includes requesting to receive a page that announces when a program is to be broadcast. The method also includes sending the page to the mobile station before the program is to be broadcast. The method further includes receiving the page at the mobile station. A method for providing interactive feedback in a wireless communication network is also provided. The method includes broadcasting a program from a server to a mobile station. The method also includes receiving at least part of the program at the mobile station. The method further includes providing feedback about the program from the mobile station.
    Type: Grant
    Filed: February 23, 2009
    Date of Patent: December 17, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Baowei Ji, Kaushik Josiam
  • Patent number: 8443124
    Abstract: A physical layer device (PLD) includes a first serializer-deserializer (SERDES) device and a second SERDES device. Each SERDES device includes an analog portion with a serial port that is configured to communicate serial data with various network devices, and a digital portion that is configured to communicate parallel data with other various network devices. The PLD includes a first signal path that is configured to route serial data signals between the analog portions of the SERDES devices, bypassing the digital portions of the SERDES devices. Therefore, the SERDES devices can directly communicate serial data without performing parallel data conversion. A second signal path is configured to route recovered clock and data signals between the analog portions of the SERDES devices, but still bypassing the digital portions of the SERDES devices. The recovered clock and data signals are then regenerated before being transmitted over a network device.
    Type: Grant
    Filed: March 19, 2010
    Date of Patent: May 14, 2013
    Assignee: Broadcom Corporation
    Inventors: Kevin T. Chan, Michael Q. Le
  • Patent number: 8321590
    Abstract: Techniques are provided to discover and integrate applications in an application router framework. The discovery operation includes receiving a registration notification for an application on a network, adding information describing the application to a repository into a data structure and publishing the data structure onto an application router. Association operations include querying one or more application routers on an application network for meta-data and other information on applications, exchanging the meta-data and other information between the application routers and associating the applications together automatically using their respective application protocols.
    Type: Grant
    Filed: September 16, 2009
    Date of Patent: November 27, 2012
    Assignee: International Business Machines Corporation
    Inventors: George M. Scott, Nikhyl P. Singhal, Samir G. Mitra
  • Patent number: 8160078
    Abstract: An on-demand method of routing data between a plurality of local peer groups (LPG). Each LPG includes a plurality of moving nodes. The method comprises transmitting a route request message from a source node, relaying the route request message to a native boundary node; forwarding the route request message to a foreign boundary node, determining if the destination node is within an LPG for the foreign boundary node; relaying the route request message to another boundary node if the destination node is not within the LPG, relaying the route request message to the destination node if the destination node is within the LPG, receiving the routing request message at the destination node, transmitting a routing response to the source node, relaying the routing response to the source node through a path discovered by the route request, receiving the routing response at the source node, and transmitting the data, upon receipt of the routing response.
    Type: Grant
    Filed: May 15, 2008
    Date of Patent: April 17, 2012
    Assignees: Telcordia Technologies, Inc., Toyota Infotechnology Center, U.S.A., Inc.
    Inventors: Wai Chen, Marcus Pang, Taek Jin Kwon, Ryokichi Onishi, Toshiro Hikita
  • Patent number: 8135004
    Abstract: Disclosed herewith is a multi-plane cell switch fabric system in which each switching unit functions asynchronously with others. The system executes distribution/restoration operations without lowering the switching capacity to reorder cells that arrive in random order from a plurality of switches just as they were in original flows and packets respectively with a small hardware capacity. In the system, the distribution unit divides each variable length packet addressed to the same destination into fixed length cells and sends those divided cells by a unit of integer multiple of the number of switches. On the other hand, the reordering unit, while holding cells that arrive in random order from each switching unit (switching units 1 to M) in a receive buffer, separates only the header information from each cell and holds the header information in a retry queue.
    Type: Grant
    Filed: January 29, 2008
    Date of Patent: March 13, 2012
    Assignee: Hitachi, Ltd.
    Inventor: Michitaka Okuno
  • Patent number: 8116305
    Abstract: A multi-plane cell switch fabric system prevents a decrease of the effective switching capacity when switching the variable-length packets. Distribution units classify input variable-length packets for each address, arranges the packets by a first division length unit, divides the packets into fixed-length cell payloads by a second division length unit that is an integer multiple being twice or more as large as the first division length unit, and forms a fixed-length cell by providing destination information, a source ID, a sequential number, and packet head tail information to each of the cell payloads. The cells are distributed to all the switching units one by one whenever the cells are collected to be the same number as the plural switching units. The reordering units classify the cells, reorder the sequential number in an original order, and reassemble the packets by the packet head tail information of the cell.
    Type: Grant
    Filed: March 25, 2009
    Date of Patent: February 14, 2012
    Assignee: Alaxala Networks Corporation
    Inventors: Michitaka Okuno, Mitsuo Yamamoto, Isao Kimura
  • Patent number: 8050257
    Abstract: A high capacity network comprises a plurality of edge nodes with asymmetrical connections to a plurality of switch planes, each switch plane comprising fully meshed fast-switching optical switch units. Upstream wavelength channels from each source edge node connect to different switch planes in a manner which ensures that upstream wavelength channels from any two edge nodes connect to a common switch unit in at most a predefined number, preferably one, of switch planes. Thus, switch units in different switch planes connect to upstream channels from orthogonal subsets of source edge nodes. In contrast, downstream wavelength channels from a switch unit in each switch plane connect to one set of sink edge nodes. In an alternate arrangement, the upstream and downstream asymmetry may be reversed.
    Type: Grant
    Filed: December 6, 2007
    Date of Patent: November 1, 2011
    Inventor: Maged E Beshai
  • Patent number: 8036655
    Abstract: System and method for seamless roaming over scalable wide area Wireless LAN networks (WAWLAN) with clientless mobile subscribers. A preferred embodiment comprises a wireless gateway (WG) coupled to one or more access points in a wireless network to form a wireless cluster (WC), a network access gateway (NAG) coupled to a wired network, and a switch coupled to the WG and the NAG. Each wireless cluster is a Wireless LAN Network (WLAN) with homogenous or heterogeneous network architecture. The WG detects mobile nodes in a wireless cluster and tracks mobile node location in the wireless cluster. The NAG is an anchor point for mobile nodes in the WAWLAN and maintains a fixed source of information about each mobile node regardless of their mobility. The switch provides connectivity between the NAG and the WG. Seamless roaming across Wireless LAN network boundary by mobile subscribers without requiring special mobility enabling client software.
    Type: Grant
    Filed: May 21, 2010
    Date of Patent: October 11, 2011
    Assignee: Nortel Networks Limited
    Inventors: Kris Ng, Tricci So, Yusupha Touray, Donald Wade, Hamid Mahmood, Fayaz Kadri
  • Patent number: 7948975
    Abstract: A communication apparatus includes at least one input port, multiple output ports, at least one Serial-to-Parallel (S/P) converter and at least one Parallel-to-Serial (P/S) converter. The S/P converter is operative to receive from the input port an input data stream that is to be cross-connected to a destination output port, and to separate the input data stream into multiple sub-streams. Each of the switching planes includes at least one input for receiving a respective sub-stream from the S/P converter; multiple outputs, each output associated with a respective one of the output ports; and switching circuitry, which is configured to switch the respective sub-stream to the output that is associated with the destination output port. The P/S converter is coupled to the outputs of the switching planes so as to combine the multiple sub-streams switched by the switching circuitry into a combined output data stream at the destination output port.
    Type: Grant
    Filed: March 2, 2009
    Date of Patent: May 24, 2011
    Assignee: IPLight Ltd.
    Inventors: Ruben Gabriel Markus, Israel Vitelson, Joseph Moshe
  • Patent number: 7881332
    Abstract: A system and method in accordance with the present invention allows for an adapter to be utilized in a server environment that can accommodate both a 10 G and a 1 G source utilizing the same pins. This is accomplished through the use of a high speed serializer/deserializer (high speed serdes) which can accommodate both data sources. The high speed serdes allows for the use of a relatively low reference clock speed on the NIC to provide the proper clocking of the data sources and also allows for different modes to be set to accommodate the different data sources. Finally the system allows for the adapter to use the same pins for multiple data sources.
    Type: Grant
    Filed: April 1, 2005
    Date of Patent: February 1, 2011
    Assignee: International Business Machines Corporation
    Inventors: Claude Basso, Jean Louis Calvignac, Chih-Jen Chang, Philippe Damon, Natarajan Vaidhyanathan, Fabrice Jean Verplanken, Colin Beaton Verrilli
  • Patent number: 7860037
    Abstract: A telecommunications system for communicating internet packets between a correspondent node and a mobile node. The system comprises a packet radio network providing packet data bearers for communicating internet packets with nodes. Each of the bearers is defined with respect to a source address of the internet packets, the packet radio network including a gateway support node (GGSN) to provide an interface between the external network and the packet radio network. The GGSN detects whether an internet packet is for providing a binding update to the correspondent node of a first source address of the mobile node to a care-of-address of the mobile node. If the internet packet is a binding update, the GGSN allows egress of internet packets sent from the correspondent node. By allowing egress of packets from the correspondent node having this care-of-address as the destination address, a measure of security is provided.
    Type: Grant
    Filed: May 17, 2004
    Date of Patent: December 28, 2010
    Assignee: Orange SA
    Inventor: Xiaobao Chen
  • Patent number: 7804825
    Abstract: A cross-connect switching system includes a plurality of three stage switching arrays and an expansion switching array, wherein a second stage of each of the three stage switching arrays includes an expansion section comprising switches which facilitate interconnection of each three stage array to the expansion switching array. In one embodiment, the expansion switching array includes a plurality of square arrays, each having Q inputs and Q outputs and wherein the second stages of the three stage arrays each include 1 . . . M+1 . . . M+p vertical stages which connect to the square ā€œDā€ arrays of the central expansion switching array.
    Type: Grant
    Filed: December 4, 2007
    Date of Patent: September 28, 2010
    Inventors: Kevin Wilson, Ninh Nguyen
  • Patent number: 7756124
    Abstract: Systems, methods, and devices are provided for moving packets on a network device. One method includes receiving packets to a number of network chips, the number of network chips having a conduit port which can be selectively chosen to exchange packets with a processor responsible for processing packets. The method includes adding data for additional functionality to certain packets. Adding data includes encapsulating the certain packets to maintain an appearance of a certain packet format.
    Type: Grant
    Filed: March 23, 2005
    Date of Patent: July 13, 2010
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Bruce E. LaVigne, John A. Wickeraad, Lewis S. Kootstra, Jonathan M. Watts
  • Patent number: 7649846
    Abstract: To enable quick movement of communications among links in a link aggregation group, network element use a purge mechanism. A network element implementing the purge mechanism may disable distribution of additional frames to output queues associated with aggregated ports and potentially drop some or all frames from the output queues associated with aggregated ports. In conjunction with the dropping of frames, the network element may exchange one or more marker messages and marker responses with a remote network element. After receiving appropriate responses, the network element may restart distribution of frames to the affected ports.
    Type: Grant
    Filed: March 31, 2006
    Date of Patent: January 19, 2010
    Assignee: Fujitsu Limited
    Inventors: Yukihiro Nakagawa, Takeshi Shimizu
  • Patent number: 7630362
    Abstract: An STM telecommunications switch comprising a plurality of parallel data switching planes and a parallel control planes, each plane having an equal number of input ports and output ports and a central switching unit to switch each input port to any output port and wherein the data is switched in octets.
    Type: Grant
    Filed: June 10, 1997
    Date of Patent: December 8, 2009
    Assignee: Ericsson AB
    Inventors: Mark Timothy Jeffrey, Thomas Slade Maddern, Richard John Proctor
  • Patent number: 7610404
    Abstract: A method and apparatus is provided to discover and integrate applications in an application router framework. The discovery operation includes receiving a registration notification for an application on a network, adding information describing the application to a repository into a data structure and publishing the data structure onto an application router. The association operations include querying one or more application routers on an application network for meta-data and other information on applications, exchanging the meta-data and other information between the application routers and associating the applications together automatically using their respective application protocols.
    Type: Grant
    Filed: May 22, 2003
    Date of Patent: October 27, 2009
    Assignee: Cast Iron Systems, Inc.
    Inventors: George M. Scott, Nikhyl P. Singhal, Samir G. Mitra
  • Patent number: 7529221
    Abstract: A system for sending multimedia information from at least one base station to one or more mobile stations via at least one wireless communication link includes at least one multimedia source for generating the multimedia information. At least one processor is coupled to the multimedia source for generating a number of data streams derived from the multimedia information on a media control access (MAC) layer. At least one data channel modulator is coupled to the processor for mapping the data streams into a number of data packets on a forward packet data channel between the base station and the mobile station, using a physical layer signaling based on a code-division multiple access (CDMA) or orthogonal frequency division modulation (OFDM) technology.
    Type: Grant
    Filed: November 17, 2005
    Date of Patent: May 5, 2009
    Assignee: Taiwan Semicondutor Manufacturing Co., Ltd.
    Inventors: Stash Czaja, Feng Qian
  • Patent number: 7512192
    Abstract: A phase conjugation vectoring (PCV) of signals propagating in telephone cables of twisted pairs provides crosstalk free transmission therethrough. The cable is considered a non-uniform physical media, and criteria for phase conjugation of electromagnetic fields are established. Method and system provide PCV for both asymmetric and symmetric transmission.
    Type: Grant
    Filed: February 10, 2004
    Date of Patent: March 31, 2009
    Inventor: Ilya M. Fishman
  • Patent number: 7468891
    Abstract: A reduced size multiplexer and, in particular, a reduced size SONET multiplexer module is provided for use in a reduced size enclosure. The SONET multiplexer module has electrical and optical connectors on its faceplate to provide ease in access without having to remove the SONET multiplexer from the enclosure. The SONET multiplexer circuit is configured in a standard Type 400 mechanics circuit board arrangement. The SONET multiplexer module therefore can be inserted into an enclosure in a direction opposite to that in which the coaxial connector projects from the face plate, so that the coaxial connector remains freely accessible outside of the enclosure when the SONET multiplexer module is fully loaded into the enclosure. Coaxial cables and optical fibers can thus be easily coupled to the coaxial and optical connectors, respectively, when the SONET multiplexer circuit is fully loaded into the enclosure.
    Type: Grant
    Filed: August 23, 2005
    Date of Patent: December 23, 2008
    Assignee: Hubbell Incorporated
    Inventors: Bruce Lipski, Gary M. Miller, David O. Corp
  • Patent number: 7450494
    Abstract: A reconfigurable apparatus providing 1:N redundancy and 1:1 redundancy for high speed broadband interfaces with 1+1 and 1:N Automatic protection Switching (APS), is presented. The apparatus includes a mini-midplane having a redundant slot, a plurality of active slots and capable of communication with a gateway. The mini-midplane includes at least one set of cross-coupled APS lines for implementing 1:1 equipment redundancy for high speed broadband interfaces with 1+1/1:N APS and a plurality of point-to-point traces between redundant slot and each of the active slots for implementing 1:N equipment redundancy for high speed broadband interfaces with 1+1/1:N APS. The mini-midplane may further include a plurality of shared traces between the redundant slot and said at least one active slot for implementing 1:N equipment protection for low speed narrowband interfaces.
    Type: Grant
    Filed: September 3, 2004
    Date of Patent: November 11, 2008
    Assignee: Cisco Technology, Inc.
    Inventors: Akin Koyuncuoglu, Biju Raghavan Nair, Cedric Elg, Hang Tran, Rajesh Edamula, Reetesh Kapahi, Santosh Kuzhumiyil Koroth
  • Patent number: 7397794
    Abstract: A switching device includes multiple interfaces and a switch fabric. The switch fabric includes switch integrated circuits arranged in a number of stages. Multiple virtual switch planes may be implemented in the switch fabric. Data traffic received at the interfaces is selectively assigned to different ones of the virtual switch planes.
    Type: Grant
    Filed: November 21, 2002
    Date of Patent: July 8, 2008
    Assignee: Juniper Networks, Inc.
    Inventors: Philippe Lacroute, Matthew A. Tucker, John D. Weisbloom, Anjan Venkatramani, Jayabharat Boddu, Stefan Dyckerhoff
  • Patent number: 7292785
    Abstract: An optical transmission system accomplishes optical transmission over a long distance by combining a multiplexing line terminal with optical amplifiers, linear repeaters, and regenerators with optical amplifiers combined together. The system also accomplishes the optical transmission over a short distance by directly connecting the linear terminals therebetween, with an electric-to-optic converter replaced by an electric-to-optic converter having a semiconductor amplifier, with an optic-toelectric converter by an optic-to-electric converter having an avalanche photodiode as light receiver, and with no use of any optical booster amplifier and optical preamplifier in multiplexing line terminal. With these, the optical transmission system can be easily constructed depending on the transmission distance required.
    Type: Grant
    Filed: November 7, 2006
    Date of Patent: November 6, 2007
    Assignee: Hitachi, Ltd.
    Inventors: Keiji Tomooka, Naohiro Sakakida, Shin Nishimura, Yoshihiro Ashi, Hironari Matsuda, Satoshi Aoki, Yukio Nakano, Masahiro Takatori, Toru Kazawa, Shinya Sasaki, Ryoji Takeyari, Hiroyuki Nakano
  • Patent number: 7286526
    Abstract: A method and system for providing network processor management that efficiently operates in homogenous and heterogonous environments are provided. The system includes a controlled entity having a switched architecture including a first set of processing resources and a second set of processing resources distinct from the first set of processing resources, and a controller for issuing a control request packet to the first set of processing resources, the control request packet including a first set of control actions and a second set of control actions, wherein the controlled entity processes the first set of control actions using the first set of processing resources and transfers the second set of control actions to the second set of processing resources.
    Type: Grant
    Filed: March 14, 2003
    Date of Patent: October 23, 2007
    Assignee: International Business Machines Corporation
    Inventors: Claude Basso, Sridhar Rao, Colin Beaton Verrilli
  • Patent number: 7254128
    Abstract: A channel data extracting circuit for extracting data for each channel from a frame in which byte data of channels are multiplexed includes a Banyan unit and data control unit. The Banyan unit distributes data for respective channels by Banyan switches of planes corresponding to the channels, and sequentially aligns word data. The data control unit transmits to the Banyan unit a control signal representing a channel to which data belongs, and controls the operations of the Banyan switches. A channel data extracting method is also disclosed.
    Type: Grant
    Filed: January 24, 2002
    Date of Patent: August 7, 2007
    Assignee: NEC Corporation
    Inventor: Hideki Nishizaki
  • Patent number: 7245641
    Abstract: Disclosed herein is a variable length packet switching system. The variable length packet switching system includes at least two switching means, a plurality of multiplexing units and a plurality of demultiplexing units. The switching means switch ATM cells or variable length packet data in parallel. The multiplexing means are arranged upstream of the switching means for multiplexing data inputted from a line card to the switching means in packet units and dividing a packet into packets of a number corresponding to the number of the switching means. The demultiplexing means are arranged downstream of the switching means for combining packets inputted after being switched in parallel by the at least two switching means and outputting the combined packet converted into a format adequate to the line card.
    Type: Grant
    Filed: September 19, 2002
    Date of Patent: July 17, 2007
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Chan Kim, Kyeong Soo Han, Je Soo Ko, Tae Whan Yoo, Jong Hyun Lee
  • Patent number: 7231469
    Abstract: A disk controller has a channel adapter having a connection interface to a host computer or a disk drive; a memory adapter for temporarily storing data to be transferred between the host computer and disk drive; a processor adapter for controlling operations of the channel adapter and memory adapter; and a switch adapter for configuring an inner network by interconnecting the channel adapter, memory adapter and processor adapter, wherein the channel adapter, memory adapter, processor adapter and switch adapter each include a DMA controller for performing a communication protocol control of the inner network; and packet multiplex communication is performed among the DMA controllers provided in the adapters. The disk controller can realize a high transfer efficiency and a low cost while retaining a high reliability.
    Type: Grant
    Filed: April 16, 2004
    Date of Patent: June 12, 2007
    Assignee: Hitachi, Ltd.
    Inventors: Mutsumi Hosoya, Naoki Watanabe, Shuji Nakamura, Yasuo Inoue, Kazuhisa Fujimoto
  • Patent number: 7197031
    Abstract: A serial data stream is mapped through a cross-connect via two or more parallel independent shelves. The serial data stream is split into at least two sub-streams. If the lead frame of a sub-stream contains a concatenation indicator, it is replaced by a valid payload pointer, and a spilt indicator is inserted into the frame. Each of the sub-streams is then mapped through the cross-connect via a respective parallel independent shelf. Finally, the sub-streams are recombined to form an output serial data stream equivalent to the original serial data stream. If the lead frame of a sub-stream contains a split indicator, a concatenation indicator is inserted into the corresponding frame of the output serial data stream to restore the concatenation of the original serial data stream. Otherwise, a payload pointer within the lead frame is replaced by a valid payload pointer in the corresponding frame of the output data stream.
    Type: Grant
    Filed: November 26, 2001
    Date of Patent: March 27, 2007
    Assignee: Nortel Networks Limited
    Inventors: Malcolm Betts, Kim B. Roberts, Ronald J. Gagnon
  • Patent number: 7046681
    Abstract: A network switch includes an input layer to receive a data stream with a set of cells. Each cell includes data and a header to designate a destination device. The input layer includes a set of input layer circuits. A selected input layer circuit of the set of input layer circuits receives the data stream. The selected input layer circuit includes a set of queues corresponding to a set of destination devices. The selected input layer circuit is configured to assign a selected cell from the data stream to a selected queue of the set of queues. The selected queue corresponds to a selected destination device specified by the header of the selected cell. An intermediate layer includes a set of intermediate layer circuits, each intermediate layer circuit has a set of buffers corresponding to the set of destination devices.
    Type: Grant
    Filed: August 24, 2001
    Date of Patent: May 16, 2006
    Assignee: Raza Microelectronics, Inc.
    Inventors: Kai-Yeung (Sunny) Siu, Brain Hang Wai Yang, Mizanur M. Rahman
  • Patent number: 7027436
    Abstract: Multistage switching for mixed SONET VT traffic, such as VT1.5s and VT2s, is accomplished by employing an input time switch, a space switch and an output time switch. The input time switch and output time switch include VT1.5 time switches arranged to alter the time order of the input VT1.5s and VT2 time switches arranged to alter the time order to the input VT2s. The space switch includes a VT1.5 space switch arranged to order the input VT1.5s with respect to output channels in an output channel order different from the input channel order of the VT1.5s. The space switch also includes a VT2 space switch arranged to order the input VT2s with respect to output channels in an output channel order different from the input channel order of the VT2s.
    Type: Grant
    Filed: August 31, 2001
    Date of Patent: April 11, 2006
    Assignee: Tellabs Operations, Inc.
    Inventors: Thomas E. Ryan, Terrence J. Tanis
  • Patent number: 6990095
    Abstract: A self-routing data switching system is disclosed. The data switching system includes a plurality of repetitive switching matrix planes, each of which is electrically connected between a less number of input terminals and a larger number of output terminals, thereby reducing the head-of-line blocking effect. Each switching matrix plane includes a switching element array interconnected between the input ports and the output ports for determining whether the data packet from an input port can be transmitted to a designated output port. The data switching system further includes a plurality of pre-processors to manage the input timing of data packets into the switching matrix array in order to avoid output conflict.
    Type: Grant
    Filed: October 2, 2001
    Date of Patent: January 24, 2006
    Assignee: National Taiwan University
    Inventors: Jingshown Wu, Kun-Tso Chen, Hen-Wai Tsao
  • Patent number: 6973079
    Abstract: A method and apparatus for reallocating switching circuitry in a switching fabric are disclosed. The switching fabric is used to permit data transfer among a plurality of interface units each having a plurality of data ports. The switching fabric is partitionable into a plurality of switch planes such that each switch plane can be assigned to transfer data associated with like data ports of the interface units. Each switch plane includes multiple switching channels each assignable to transfer data associated with one data port of one of the interface units, in a full implementation. The number of interface units is less than the number of switching channels in a switch plane, then the reallocation is performed such that multiple channels of at least one switch plane can be assigned to transfer data of multiple ports of at least one of the interface units. This results in switch plane channels that would otherwise be unused being utilized to transfer data.
    Type: Grant
    Filed: September 22, 1999
    Date of Patent: December 6, 2005
    Assignee: Pluris, Inc.
    Inventors: James D. Carlson, Steven J. Schwartz, Eric J. Spada, Eric J. Pelletier, Jeffrey A. Koehler
  • Patent number: 6944149
    Abstract: A PN sequence phase searching apparatus in a multi-carrier CDMA mobile communication system. At least two PN sequence phase searchers search for the PN sequence phase of one of at least two different band input signals on different assigned search conditions and output PN phase and energy information. A controller assigns the different search conditions to the PN sequence phase searchers and determines a minimum phase variation period based on the PN phase and energy information received from the PN sequence phase searchers.
    Type: Grant
    Filed: September 24, 1999
    Date of Patent: September 13, 2005
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sang-Burn Kim, Hye-Jeong Kim
  • Publication number: 20040184449
    Abstract: An apparatus for use in a first packet switching device that transmits outgoing data packets to a second packet switching device over N heterogeneous data links. The first packet switching device comprises N packet queues for storing outgoing data packets. The apparatus selects one of the N heterogeneous data links to transmit a first outgoing data packet. The apparatus comprises a controller that calculates a packet delay value for each one of a subset of S of the N heterogeneous data links. The packet delay (PD) value for each data link is determined as a function of i) a propagation delay (D) of the data link; ii) a packet size (PS) of the first outgoing data packet; iii) a queue size (QS) of a packet queue associated with the data link; and iv) a bandwidth (BW) of the data link.
    Type: Application
    Filed: March 19, 2003
    Publication date: September 23, 2004
    Applicant: SAMSUNG ELECTRONICS Co., LTD.
    Inventors: Sreedharan Sreejith, Pradeep Samudra
  • Patent number: 6775275
    Abstract: In a matrix switch method, pieces of timing information synchronous with the signal speeds of input data parallelly input to N (N is a positive integer) input terminals are extracted. The respective input data are switched/output to N output terminals through a switch. Output signals from the output terminals of the switch are regenerated by using the pieces of timing information extracted from the corresponding input data. A matrix switch device is also disclosed.
    Type: Grant
    Filed: November 24, 1998
    Date of Patent: August 10, 2004
    Assignee: NEC Corporation
    Inventor: Tetsuyuki Suzaki
  • Patent number: 6744768
    Abstract: The combination of narrowband applications with broadband transport may be enabled with a communications architecture, in which one or more Media Gateways (MGs) that include broadband switching fabric are controlled by a Media Gateway Controller (MGC) that includes switching intelligence and narrowband switching fabric. A new data structure is provided in the MGC to identify bandwidth allocation on all traffic trunks interconnecting MGs controlled by the MGC. The new data structure can further maintain quality data representing the quality of packet transmissions in the broadband network data. The new data structure enables the MGC to monitor congestion in the broadband network and to allocate bandwidth more efficiently.
    Type: Grant
    Filed: September 30, 2002
    Date of Patent: June 1, 2004
    Assignee: Telefonaktiebolaget LM Ericsson
    Inventors: Jari Tapio Vikberg, Tomas Nylander
  • Patent number: 6700886
    Abstract: An asynchronous serial crosspoint switch is word synchronized to each of a number of transceiver circuits. The crosspoint switch circuit generates both a master bit clock and a master word clock signal. A transceiver circuit recovers the master bit clock signal from an incoming high-speed serial data stream using a clock and data recovery circuit. The recovered bit clock signal is used as a timing signal by which data is serialized and transmitted to the crosspoint switch circuit. The data stream transmitted to the switch circuit is frequency locked to the master bit clock signal, such that the serial data stream need only be phase adjusted with a data recovery circuit. To recover word timing, the switch circuit issues alignment words to the transceivers during link initialization. The transceivers perform word alignment and establish a local word lock. Alignment words are then reissued to the switch circuit using the local word clock.
    Type: Grant
    Filed: January 14, 2002
    Date of Patent: March 2, 2004
    Assignee: Vitesse Semiconductor Corporation
    Inventors: John P. Mullaney, Gary M. Lee
  • Publication number: 20040032865
    Abstract: Apparatus and method for establishing call connection state in packet data communication system. The apparatus controls a Service General Packet Radio Service (GPRS) Support Node (SGSN) to avoid establishing a call connection state associated with an erroneous Gateway GPRS Support Node (GGSN). The SGSN attempts to establish a call connection state with a GGSN connected to the SGSN, and stores the attempt result information in a specific memory. In this case, the memory stores information indicating success or failure of the attempt directed to the specific GGSN, and call setup attempt time information, etc. Thereafter, if a call setup operation associated with the specific GGSN is re-attempted, then information associated with the specific GGSN is read from information pre-stored in the memory. Based on the read information, it is determined whether a call setup operation directed to the specific GGSN is reattempted, or another call setup operation directed to another GGSN is newly attempted.
    Type: Application
    Filed: August 11, 2003
    Publication date: February 19, 2004
    Applicant: Pharmacia Corporation
    Inventor: Eun-Hyun Kwon
  • Patent number: 6694201
    Abstract: A supervisory parallel switching device is designed for use with a CIM system including a host computer unit connected via an extended computer integrated unit to at least one equipment unit through an SECS-compliant (Semiconductor Equipment Communication Standard) serial communication link, for the purpose of allowing the equipment unit to be continuously under computer control even in the event of an unanticipated shutdown to the extended computer integrated unit.
    Type: Grant
    Filed: August 17, 2000
    Date of Patent: February 17, 2004
    Assignee: Industrial Technology Research Institute
    Inventors: Wen-Yo Lee, Chun-Hung Liu, Chien-Rong Huang, Shao-Kung Chang, Jou Chyn
  • Publication number: 20030202509
    Abstract: An information processing apparatus having unique information connected to a network together with a plurality of other information processing apparatuses each connected to the network and each having unique information is provided. The apparatus includes a receiving means for receiving the unique information for identifying all of the information processing apparatuses on the network, and a network structure obtaining means for obtaining a network structure of the network based upon the unique information of all of the information processing apparatuses. The apparatus further comprises a counting means for counting a number of connections between all of the information processing apparatuses on the network based upon the network structure, and a controlling means for controlling communication timing of the information apparatuses on the network based upon the number of the connections. The network may be a bus interface, and the information processing apparatus may be an Audio/Visual apparatus.
    Type: Application
    Filed: June 24, 1999
    Publication date: October 30, 2003
    Inventors: MICHIO MIYANO, JUNJI KATO, TAKEHIKO NAKANO
  • Publication number: 20030147375
    Abstract: A high-speed router backplane is disclosed. The disclosed construction and layout techniques enable the construction of a reliable, high-layer-count, and economical backplane for routers and the like that use signaling across the backplane at trace speeds of 2.5 Gbps or greater. Specific ranges of differential trace geometry characteristics, with significant single-ended coupling to adjacent ground planes, have been found to provide the parameters needed for such signaling. New trace routing and layering techniques also help in the realization of a backplane embodiment containing roughly 600 operable high-speed differential pairs, while also providing sufficient electromagnetic interference management to allow power distribution to occur within the same backplane.
    Type: Application
    Filed: February 5, 2002
    Publication date: August 7, 2003
    Applicant: Force10 Networks, Inc.
    Inventors: Joel R. Goergen, Ashby Armistead, Greg Hunt
  • Patent number: 6597691
    Abstract: High performance switching network topologies and frame addressing techniques therefor are disclosed. A two-dimensional Fiber Channel switch fabric is disclosed which combines a Class 1 connection space-division multiplexing sub-fabric, and Class 2 and 3 connectionless space- and time-division multiplexing sub-fabric. Networking topologies are disclosed for combining multiple modules to increase the number of supported ports. Addressing and frame routing techniques are provided for routing frames to any port in any module of a large interconnected network of modules.
    Type: Grant
    Filed: August 30, 1999
    Date of Patent: July 22, 2003
    Assignee: Ancor Communications, Inc.
    Inventors: Terry M. Anderson, William R. George
  • Patent number: 6587461
    Abstract: In one embodiment, in a switching system, an ASIC device on a card coupled to a backplane communicates switched data to an outgoing network interface for the card without using the backplane, and remaining ASIC devices on the card communicate switched data, to other cards using the backplane for communication to outgoing network interfaces for the other cards. In another embodiment, an ASIC device includes a RAM storing a code for each first slot to combine with corresponding data from a first bus to specify an operation, a RAM applying the operation to generate modified data for each first slot, a RAM communicating as an address information specifying a second slot to correspond to each first slot, and a RAM locating the modified data for each first slot of a previous frame according to the address and communicating this modified data to a second bus in the corresponding second slot while the modified data for a current frame is being stored.
    Type: Grant
    Filed: June 8, 1999
    Date of Patent: July 1, 2003
    Assignee: Cisco Technology, Inc.
    Inventors: Brent K. Parrish, Werner E. Niebel
  • Patent number: 6085254
    Abstract: A method and system for use primarily, but not exclusively, in digital communications switching systems are disclosed, in which the size of traffic-sensitive (temporary) size-alterable memory files is automatically increased when file congestion occurs. Preferably, the logical size of the files is increased, which can be accomplished much faster than by conventional approaches, because there is no need to make physical memory store reallocations. Additionally, an operator and/or an application program can dynamically control the utilization of traffic-insensitive (permanent) size-alterable files.
    Type: Grant
    Filed: April 10, 1998
    Date of Patent: July 4, 2000
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Alexander Kotsinas, Naresh Rajasingham
  • Patent number: 6064669
    Abstract: A switching network having a plurality of independent switching units with each switching unit switching one bit of each group of data from external data links through a telecommunication switching system. The plurality of switching units is greater than the number of bits that must be switched which increases reliability. This allows the extra switching units to be utilized as replacement switching units should a switching unit actively switching a bit of the incoming data be disabled. The switching units provide full broadcast switching of data from any individual external link to any number of the other external links. A plurality of port units terminate the external links, and a plurality of control paths are provide from a central controller to each of the port units. Each of the switching units communicated one of the control paths. For control, each port unit determines a set of control information that is identical from a majority of the control paths.
    Type: Grant
    Filed: August 29, 1997
    Date of Patent: May 16, 2000
    Assignee: Lucent Technologies Inc.
    Inventors: Edward J. Bortolini, James R. Bortolini, Lawrence J. Nociolo