Adapting Connectionless Variable Bit Rate (vbr) Data (e.g., Adapting 802.x, Or Using Aal5) Patents (Class 370/395.65)
  • Patent number: 6823219
    Abstract: An architecture for use in controlling and managing optical functions and optical devices. A common microprocessor based control layer coordinates commands between optical devices and a user station. The control layer executes an operating system which handles data flow in the control layer. Generic commands from the user station causes the operating system to call specific subroutines the produce digital commands. These digital commands are then passed to a digital layer that interfaces with an analog layer. The analog layer is specifically developed to interface and work with a specific optical device. The analog layer thus directly controls the optical device including changing its settings based on input from the digital layer.
    Type: Grant
    Filed: May 16, 2001
    Date of Patent: November 23, 2004
    Assignee: Dowslake Microsystems Corporation
    Inventors: Wayne Y. Lee, Dan Dan Yang
  • Publication number: 20040202186
    Abstract: An ATM (Asynchronous Transfer Mode) bridge device is provided which is capable of removing unwanted ATM network traffic transmitted by a loop packet, of avoiding confusion of a layer 2 network caused by occurrence of erroneous learning, of rapidly identifying a point where a loop has been formed, and of preventing simultaneous formation of loops among a plurality of points caused by loop setting in a plurality of interfaces. The ATM bridge device has functions of learning a MAC (Media Access Control) address of a packet transmitted from the ATM bridge device, of filtering and monitoring a MAC address of a packet input from an ATM network and judges, when receiving a packet output from the ATM bridge device, the input packet as a loop-back packet to scrap the packet and to notify an upper network layer of the loop-back packet.
    Type: Application
    Filed: April 13, 2004
    Publication date: October 14, 2004
    Applicant: NEC CORPORATION
    Inventors: Ko Kimura, Yasuhisa Kanda
  • Patent number: 6778523
    Abstract: A connectionless oriented communications network is disclosed having a plurality of IP network routers R1-R3 controllable by a service controller S the service controller S being arranged to set a service across the network by configuration of at least some of the routers R1-R3, configuration instructions to determine packet forwarding behaviour sent from the service controller S to the routers R1-R3 being in a common form and each router R1-R3 having associated therewith a translation program for translating the common form instructions into configuration information specific to that router.
    Type: Grant
    Filed: January 12, 2000
    Date of Patent: August 17, 2004
    Assignee: Kent Ridge Digital Labs
    Inventor: Raguparan Masilamany
  • Patent number: 6711126
    Abstract: The invention concerns a method of managing data packets originating from data frames, the packets being presented to buffer (40) prior to processing. When a packet corresponding to the start of a frame is presented to the buffer stage, it is determined whether the filling level of the buffer (40) exceeds a first predetermined filling threshold (42) corresponding to a state of congestion and, if such is the case, this packet and all packets belonging to that same frame are systematically discarded before the buffer. The frames can e.g. originate from AAL2 connections, and each constitute a respective ATMS adaptation layer service data unit (AAL2 SDU), in which case the packets are common part sublayer (CPS) packets, and the buffer (40) stores the CPS packets before the latter are multiplexed into asynchronous transfer mode (ATM) cells. The invention also relates to an apparatus for implementing the above method.
    Type: Grant
    Filed: January 3, 2000
    Date of Patent: March 23, 2004
    Assignee: Alcatel
    Inventor: Claire Besset-Bathias
  • Patent number: 6707819
    Abstract: Method and device provide for the encapsulation of control information in a real-time data stream. In one embodiment a method of encapsulating data in an information frame is provided. This information frame has a payload portion and a trailer portion wherein the trailer portion is designated for control data and the payload portion is designated for real-time data. In use control data is inserted into the payload portion of the information frame and an extension bit is used to signify the presence of control data in the payload portion of the information frame. The information frame is then transmited over a virtual circuit.
    Type: Grant
    Filed: December 16, 1999
    Date of Patent: March 16, 2004
    Assignee: AT&T Corp.
    Inventors: Alexander Gibson Fraser, Peter Z Onufryk, Kadangode K. Ramakrishnan
  • Patent number: 6687250
    Abstract: A device with quality controllable SAR function according to upper layer instruction enables reassembly and segmentation SAR of AAL5 to which priority in upper layer is reflected to be provided in reassembly and segmentation of AAL5 in ATM layer processing.
    Type: Grant
    Filed: May 26, 2000
    Date of Patent: February 3, 2004
    Assignee: NEC Corporation
    Inventors: Yuichi Suzuki, Tatsuhiko Amagai
  • Patent number: 6680946
    Abstract: A method for transferring a series of layer-3 packets through an ATM network composed of a plurality of ATM switches is disclosed. An ingress gateway determines whether a packet flow has been registered and, when the flow has not been registered, determines a transfer route. A connection setup cell is transmitted to a next-hop ATM switch to ensure a connection dedicated to transfer of tho series of packets. Then, a series of packets is transferred to the next-hop ATM switch through the connection after the connection has been set up.
    Type: Grant
    Filed: April 30, 1999
    Date of Patent: January 20, 2004
    Assignee: NEC Corporation
    Inventors: Kazuhiko Isoyama, Toshiya Aramaki, Akira Arutaki
  • Patent number: 6658009
    Abstract: In a system where a plurality of terminal units are connected to a network unit via an optical transmission line and packets are transmitted in units of cells according to polling information, polling request information including the number of variable-length packets stored in the buffer of each of the terminal unit, the number of cells composing each variable-length packet and the number of remaining cells of a packet being read is created, polling information corresponding to a time slot allocated according to the polling request information is transmitted from the shared band control unit of the network unit, and bands are allocated to the plurality of terminal units.
    Type: Grant
    Filed: December 14, 1999
    Date of Patent: December 2, 2003
    Assignee: Fujitsu Limited
    Inventors: Haruo Yamashita, Masatake Miyabe, Tomohiro Shinomiya, Kazuyuki Tajima, Masamichi Kasa
  • Patent number: 6628617
    Abstract: Traffic on a connectionless (CL) network, such as IP packets, can be routed onto a connection a connection oriented (CO) network, such as an ATM telephony network, when it is advantageous to do so from a user or service provider viewpoint, without affecting the ability of users to continue to use existing applications. Routing is controlled by nodes called CL-CO gateways, with connectivity to both the CL network and the Co network. When CL traffic originating at a source reached these gateway nodes, a decision is made whether to continue carrying the information in the CL mode, or to redirect the traffic to a CO network.
    Type: Grant
    Filed: March 3, 1999
    Date of Patent: September 30, 2003
    Assignee: Lucent Technologies Inc.
    Inventors: Mark John Karol, Malathi Veeraraghavan
  • Patent number: 6611892
    Abstract: The two-way transmissions are performed between a first bus and a usual portal of a first full-duplex 3-portal bridge and between a second bus and a usual portal of a second full-duplex 3-portal bridge, respectively. The one-way transmission of an isochronous packet and an asynchronous stream packet is performed between transmission and reception portals of the first full-duplex 3-portal bridge and reception and transmission portals of the second full-duplex 3-portal bridge. The first full-duplex 3-portal bridge and the second full-duplex 3-portal bridge perform a conversion between the asynchronous stream packet and an asynchronous packet if necessary.
    Type: Grant
    Filed: May 26, 2000
    Date of Patent: August 26, 2003
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yuhi Sasaki, Toshiaki Shinohara, Kengo Tsuzuki
  • Patent number: 6574227
    Abstract: A connectionless communications network includes a number of low earth orbit (LEO) satellite nodes. Motion of the satellites constantly changes the topology of the network. A virtual model of the network having fixed virtual nodes, is maintained in a connection control system. This virtual model is used to control the route that traffic will take through the real network. As topology changes happen in the network then the virtual nodes of the model become embodied by different real nodes and communicate their virtual identity to connected nodes. Routing of the traffic is performed with reference to the virtual network so that routing follows the current embodiment of the virtual network.
    Type: Grant
    Filed: January 12, 2000
    Date of Patent: June 3, 2003
    Assignee: Nortel Networks Limited
    Inventors: Catherine Rosenberg, Roy Harold Mauger, Daniel Vincent McCaughan
  • Patent number: 6574795
    Abstract: An information delivery system includes receiving platforms to receive data communicated from a transmitting source according to a unidirectional transfer protocol over a link. At least some receiving platforms process the received data to determine if a portion of expected data is missing. If so, a receiving platform is able to generate and send a request for the missing data according to a supplemental protocol that is separate from the unidirectional transfer protocol. The transmitting source is able to receive the request for missing data and to retransmit the missing data. The data may include ancillary information (e.g., enhancement data) associated with audio/video content (e.g., television content). By adding the supplemental protocol to enable requests for missing data, a unidirectional transfer protocol that is not reliable is made reliable as a mechanism is provided to ensure receipt of the transmitted data.
    Type: Grant
    Filed: August 6, 1999
    Date of Patent: June 3, 2003
    Assignee: Intel Corporation
    Inventor: Wayne J. Carr
  • Patent number: 6480495
    Abstract: A non-geostationary satellite connection-less network incorporates a plurality of satellite nodes and ground stations in communication with the nodes. The network is modeled by the corresponding virtual model network. In the virtual network, connections between users are available between virtual nodes and are made according to a restricted set of routing plans based on the modeled virtual paths between those nodes. The virtual model provides a means of determining admission of connection-orientated calls of different quality of service (QoS) traffic class requirements into the network with engineered grade of service (GoS) and QoS guarantees.
    Type: Grant
    Filed: August 26, 1999
    Date of Patent: November 12, 2002
    Assignee: Nortel Networks Limited
    Inventors: Roy Harold Mauger, Simon Daniel Brueckheimer
  • Patent number: 6449277
    Abstract: An asynchronous transfer mode (ATM) system having an interleaver of 8 bit parallel cell units includes n ATM cell header buffer for storing an ATM cell header into a cell header buffer or outputting data by 1 bit at a buffer according to a control signal output from a write controller or a read controller, a write controller to separate and store a cell header and a payload, read controller to sequentially the mixed output data from the interleaver memory, an interleaver memory for using payload data of ATM cells . . . , and a multiplexor for multiplexing 12 byte data output from the interleaver memory, wherein a 8 bit interleaver is directly added to the conventional ATM processing method since all ATM cells are to be processed by 8 bit parallel unit, and all interleaving process may be performed in parallel without any serial/parallel converting circuit, thereby achieving a device which is proper for low speed wireless environment.
    Type: Grant
    Filed: December 22, 1998
    Date of Patent: September 10, 2002
    Assignee: Hyundai Electronics Industries, Co., Ltd.
    Inventor: Jae-Hyeong Kim
  • Patent number: 6418145
    Abstract: An internet protocol (IP) layer processor has an IP header processing section for checking a defect in an IP header of a first ATM cell of an AAL5 frame, and a SAR (segregation and reassemblage) section for transferring the AAL5 frame in the form of separate ATM cells if the check by the IP header processing section indicates a normal IP header, without using a CPU. SAR notifies a defect in the IP header to CPU without transmission of the AAL5 frame if the check indicates the defect in the IP header. The IP layer processor achieves a higher processing due to the direct transfer by the SAR without using processing by a software.
    Type: Grant
    Filed: December 17, 1998
    Date of Patent: July 9, 2002
    Assignee: NEC Corporation
    Inventors: Kazuhiko Isoyama, Tatsuhiko Amagai, Toshiya Aramaki
  • Patent number: 6373846
    Abstract: An asynchronous transfer mode (ATM) digital electronic communication system includes an ATM communication system interconnection and termination unit (ATMCSI/TU). This ATMCSI/TU includes both a programmable microprocessor and several hardware-implemented coprocessors. The hardware-implemented coprocessors are under control of the microprocessor, and are dedicated to the performing of repetitive tasks. Thus, the microprocessor is freed to perform supervisory tasks in the ATM in addition to performing tasks associated with actual communication of digital data packages (i.e., CS-PDU's) in the ATM system. Thus, the APU is freed from doing respective data manipulation tasks, while these tasks are performed by one or more hardware-implemented coprocessors using memory mapped data structures and linked lists of data.
    Type: Grant
    Filed: March 9, 1998
    Date of Patent: April 16, 2002
    Assignee: LSI Logic Corporation
    Inventors: Thomas Daniel, Dieter Nattkemper, Subir Varma
  • Patent number: 6373856
    Abstract: A coding device encodes image data with the coding self-contained within specific image data units, and supplies the encoded data stream to a packetizer to generate packets from the encoded image data stream, and a packet header adding device adds to each packet a packet header containing time information whereby the temporal position of the packet is determined. Thus, temporal information associated with data received after recovery of an error can be known immediately by the receiver even when an error occurs on the communications network over which a data stream containing image data, audio data, and other information is transmitted.
    Type: Grant
    Filed: September 15, 1998
    Date of Patent: April 16, 2002
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventor: Masaaki Higashida
  • Patent number: 6339597
    Abstract: In an AAL5 jitter reduction method for an image data transmission system for converting MPEG data into ATM cells and transmitting the ATM cells through an ATM line, an addition average value of system time clocks at timings for detecting starts of adjacent transport packets after AAL5 termination is obtained. A transport packet arrival time is corrected on the basis of the obtained addition average value. An AAL5 jitter reduction apparatus is also disclosed.
    Type: Grant
    Filed: July 22, 1998
    Date of Patent: January 15, 2002
    Assignee: NEC Corporation
    Inventor: Bunri Osaki