Adapting Constant Bit Rate (cbr) Data (e.g., Voice, Or Narrow Band Isdn Over Atm, Or Using Aal1) Patents (Class 370/395.61)
  • Patent number: 7272136
    Abstract: A signalling tone detector for use in a communications network for the detection of dual frequency multi-tone (DTMF) pairs of signal tones in a time division multiplex (TDM) signal. The detector comprises first and second arrays of adaptive notch filters corresponding to the rows and columns of a subscriber's pushbutton key set. Each said notch filter responds to a respective signal tone by the generation of a corresponding output signal. A logic circuit identifies from a combination of output signals from the adaptive notch filters the presence or absence of a pair of signal tones and, when the presence of a pair of signal tones has been identified, for decodes that pair of tones to corresponding digit information. The detector is used in an arrangement for compressing and packetising TDM traffic for transport over a connectionless network. To prevent distortion, the DTMF tones are decoded to digit information prior to transport over the connectionless network.
    Type: Grant
    Filed: February 2, 2001
    Date of Patent: September 18, 2007
    Assignee: Nortel Networks Limited
    Inventors: Masoud Ahmadi, Joachim Fouret
  • Patent number: 7269175
    Abstract: The present invention provides an apparatus, system and method for transmitting asynchronous transfer mode (ATM) data cells on an ATM adaptation layer (AAL) configured connection within an ATM system comprising a digital signal processor (DSP) sub-system (160) and a host processor (190). The transmitter interfaces directly with the DSP sub-system (160) (which converts the digitized voice samples into voice signals) and the host processor (190) (which performs AAL2 signaling and layer management functions). The transmitter is configured to interleave AAL2 voice packets from the DSP sub-system (160) and signaling and management packets from the host processor (190) on an ATM connection. Data is fetched by DMA(s) (415). A channel look-up table uses the DSP assigned voice channel as an index into the table to map a voice channel to the ATM connection.
    Type: Grant
    Filed: April 6, 2001
    Date of Patent: September 11, 2007
    Assignee: Texas Instruments Incorporated
    Inventors: Magnus Karlsson, Gregory Lee Christison, Norayda Humphrey
  • Patent number: 7269167
    Abstract: An apparatus and method for providing direct trunking between a TDM switch and an backbone network are described. The apparatus is an interface adapted to convert pulse code modulated data to the data format of the backbone network and vice versa. The interface is adapted to emulate a trunk peripheral of the TDM switch by communicating with a computing module of the switch using a messaging protocol native to the computing module. The interface may therefore be connected to the TDM switch without any modification of the computing module. The interface is connected directly to a serial link of a fabric interface of the TDM switch. The advantages include a reduction in the capital investment in equipment required to connect a TDM switch to backbone network and a reduced footprint for the equipment.
    Type: Grant
    Filed: September 8, 2003
    Date of Patent: September 11, 2007
    Assignee: Nortel Networks Limited
    Inventors: Faizel Z. Lakhani, Dany Sylvain
  • Patent number: 7263557
    Abstract: A method and apparatus to detect configuration information that may be used to configure a permanent virtual circuit (PVC) between a digital subscriber line (DSL) customer premise equipment (CPE) and a DSL access module (DSLAM) is described.
    Type: Grant
    Filed: October 24, 2001
    Date of Patent: August 28, 2007
    Assignee: Intel Corporation
    Inventors: Sven O. Lund, Niels Beier
  • Patent number: 7180897
    Abstract: A telecommunications system comprising one or more cross-connects and a plurality of telephone exchanges wherein two or more of the telephone exchanges are arranged to communicate with each other via the one or more routers and an adapter for providing the telephone exchanges with a means of inter-communication via the one or more routers wherein the adapter converts traffic between packetised and non-packetised form.
    Type: Grant
    Filed: November 2, 1999
    Date of Patent: February 20, 2007
    Assignee: Ericsson AB
    Inventor: Richard J Proctor
  • Patent number: 7180900
    Abstract: An improved system and technique for processing a communications session in a data communications system suitably includes the steps of receiving the communications session at a line interface card, embedding the communications session into an asynchronous transfer mode (ATM) virtual circuit at the line interface card, transporting the virtual circuit from the line interface card to a processor card via a backplane. The processor card suitably extracts the communications session from the virtual circuit, and processes the communications session as appropriate.
    Type: Grant
    Filed: February 14, 2003
    Date of Patent: February 20, 2007
    Assignee: Motorola, Inc.
    Inventors: Harold K. Williamson, Charles Christopher Hill, Brian A. Carr
  • Patent number: 7136395
    Abstract: Headerless (i.e., zero byte) data packets are sent by a compressor over a radio bearer. The radio bearer includes a synchronized wireless link. A sequential timer-based value is associated with each of the headerless data packets. A decompressor generates a header based on the sequential timer-based value associated with a given received headerless data packet. A data packet having a compressed header is sent periodically over the synchronized wireless link. The data packet having the compressed header can also be sent when the compressor detects changes in slowly-varying header fields, in response to feedback received from the decompressor indicating that a decompression context is out of synchronization and/or just before talk spurts occur.
    Type: Grant
    Filed: October 17, 2001
    Date of Patent: November 14, 2006
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Francis Lupien, Mohammed Sammour
  • Patent number: 7110412
    Abstract: Society of Motion Picture and Television Engineers (SMPTE) video data is separated into first data and second data. A first signal is formed based on the first data. A second signal is formed based on the second data. The first signal is transported via a first Optical Carrier 3 (OC-3) channel. The second signal is transported via a second OC-3 channel.
    Type: Grant
    Filed: September 18, 2001
    Date of Patent: September 19, 2006
    Assignee: SBC Technology Resources, Inc.
    Inventors: Pierre Costa, John Robert Erickson, Ahmad Ansari
  • Patent number: 7106748
    Abstract: An illustrative intelligent network and method for providing voice telephony over ATM and alias addressing are provided that can provide significant advantages. The intelligent network includes a multi-service control point, an ATM signaling intercept processor, and a service administration. The multi-service control point receives an input extracted from an input ATM setup message that includes a called party phone number value and a VToA designator, and generates an alias ATM address of a called party CPE that corresponds to a network gateway in communication with a PSTN switch through a plurality of trunk lines and a desired trunk line of the plurality of trunk lines. The multi-service control point generates an output in response that will be used to generate an output ATM setup message that includes the alias ATM address.
    Type: Grant
    Filed: January 22, 2001
    Date of Patent: September 12, 2006
    Assignee: MCI, LLC
    Inventor: John K. Gallant
  • Patent number: 7103052
    Abstract: A device and method are disclosed for correctly restoring a read clock when there are a plurality of STM data stream transmission sources. In a CES device of an ATM communication system, ATM cells from respective connections, which are to be delivered to the same outgoing line, are accumulated in a reassembly buffer memory and a PLO control unit aggregates the amount of ATM cells accumulated in the reassembly buffer memory for each connection. Subsequently, the PLO control unit calculates the frequency of a read clock based on the amount of accumulated ATM cells for each connection. A PLO restores the read clock which is applied to read data from the reassembly buffer memory for delivery to an STM network.
    Type: Grant
    Filed: May 24, 2002
    Date of Patent: September 5, 2006
    Assignee: Juniper Networks, Inc.
    Inventor: Yoshio Shirasaki
  • Patent number: 7103036
    Abstract: When a communication system is constructed by use of a plurality of data relay apparatuses of the present invention, it is possible to control an execution/non-execution of a compression/decompression for voice data so that the compression/decompression is not repeatedly executed regardless of a PBX. An ATM multiplexer sends out a transmission pattern to an apparatus adjacent to the ATM multiplexer via a PBX, and stops the compression/decompression of the voice data to relay the voice data transmissively, only when the ATM multiplexer receives the transmission pattern from the adjacent apparatus via the PBX. In other cases, the ATM multiplexer relays the voice data while executing the compression/decompression operation for the voice data.
    Type: Grant
    Filed: March 30, 2001
    Date of Patent: September 5, 2006
    Assignee: Hitachi Telecom Technologies, Ltd.
    Inventors: Toru Yoshihara, Shinya Suzuki, Kimitoshi Takeuchi
  • Patent number: 7085278
    Abstract: A DSL 5 is connected between an exchange device 3 and an IAD1 to which DSL subscriber terminals 2-1 through 2-n are connected, and the exchange device 3 is equipped with a VMG 4 for terminating an ATM cell multiplexed over the DSL 5, a voice packet transmitted as multiplexed over the DSL 5 is directly terminated at the exchange device 3, which in turn converts the voice packet into a packet according to an existing exchange device interface 8, so that DSL subscribers can be accommodated in the exchange device 3 directly and also exchange device software for operating the exchange device 3 can control call processing without knowing about a device under the control of a subscriber control unit, as a result, user burdens can be mitigated.
    Type: Grant
    Filed: February 6, 2002
    Date of Patent: August 1, 2006
    Assignee: Juniper Networks, Inc.
    Inventors: Hiroyuki Kunimaru, Kazuya Yanagi
  • Patent number: 7079543
    Abstract: A method and system for transmitting traffic having disparate rate components includes receiving a plurality of traffic streams. Each traffic stream includes a first component and a reduced rate second component associated with the first component. The first components of the traffic streams are segmented into successive cells. The second components of the traffic streams are distributed between a defined set of the cells for in-band transmission of the second components.
    Type: Grant
    Filed: September 3, 1999
    Date of Patent: July 18, 2006
    Assignee: Cisco Technology, Inc.
    Inventors: Barry W. Field, Kenneth M. Buckland, Riccardo G. Dorbolo
  • Patent number: 7068664
    Abstract: In a voice interception system, a voice is intercepted by applying a function of a vocoder installed in a voice signal processor to a mobile switching station. This interception implies a conversion between an ATM cell of an AAL2pf, an AAL2, and an AAL1 (PCM), and a conversion between an ATM cell of an AAL2pf and an AAL1 (TFO) in a TFO case. The ATM cell of the AAL2 in the ATM network is picked up from an ATM switch and is intercepted. If a voice TFO CODEC method is used, the above functions are applied to a voice monitor and a voice signal, during a telephone call between mobile stations, is intercepted. It is possible with the disclosed invention to carry out a voice interception only by controlling the ATM switch without individual control of both the ATM switch and an STM switch.
    Type: Grant
    Filed: May 15, 2001
    Date of Patent: June 27, 2006
    Assignee: NEC Corporation
    Inventor: Koji Arakawa
  • Patent number: 7058300
    Abstract: A transmitting-end device generates a pilot signal with a pilot signal generation section, and transmits a pilot signal to a receiving-end device. At the receiving-end device, a transmission rate modification section detects the transmission band of an optical transmission line based on the amplitude of the pilot signal, and decides a data transmission rate acceptable to the receiving-end device by taking into account the transmission band of the optical transmission line. Based on a maximum data transmission data acceptable to the transmitting-end device and the data transmission rate thus decided, a control section in the receiving-end device arbitrates a data transmission rate between it and the transmitting-end device.
    Type: Grant
    Filed: April 19, 2002
    Date of Patent: June 6, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Keisuke Kinoshita, Satoshi Furusawa, Masaru Fuse, Susumu Morikura
  • Patent number: 7035294
    Abstract: A point-to-point system for connecting a line card to a switching card using a transmission rate measured in gigabits per second.
    Type: Grant
    Filed: June 4, 2001
    Date of Patent: April 25, 2006
    Assignee: Calix Networks, Inc.
    Inventors: Jason Dove, Brian Semple, Andre Tanguay
  • Patent number: 7031300
    Abstract: Communication terminals are connected to a communication network via at least one hub having an unambiguous address in the communication network. Data transmission between the switching system and the communication terminals is provided using a time-slot-oriented data format formed from a periodic sequence of channel-oriented information segments. The address of the hub is transmitted from the hub to the switching system in an agreed information segment.
    Type: Grant
    Filed: September 13, 1999
    Date of Patent: April 18, 2006
    Assignee: Siemens Aktiengesellschaft
    Inventors: Wolfgang Fraas, Klaus Huenlich
  • Patent number: 7020124
    Abstract: A frame control method and apparatus is described for controlling a transport frame used for transmitting a data unit via a dedicated channel between network elements of a communication system having different types of connections. The frame type coding of the transport frame is selected in accordance with a connection type of the dedicated channel, such that a connection type specific frame length, dimension and/or segmentation is achieved. This allows an efficient usage of transmission resources, wherein an overhead of control information for the transmission of the data units is achieved.
    Type: Grant
    Filed: April 4, 2001
    Date of Patent: March 28, 2006
    Assignee: Nokia Corporation
    Inventor: Fabio Longoni
  • Patent number: 7002969
    Abstract: A circuit simulation apparatus is disclosed by which, even if an STS-N frame of an abnormal length is detected by a reassembly buffer, the frame length can be compensated for while preventing an overflow of the reassembly buffer. When an STS-(N×M) frame formed by multiplexing M STS-N frames formed from different channels is cellularized into ATM cells or M different STS-N frames assembled from ATM cells are multiplexed into an STS-(N×M) frame, an ATM cell sync signal and ATM cell data from a buffer section are outputted as a frame pulse signal and frame data from a reassembly section to a circuit termination section, and frame length compensation of the frame pulse signal and the frame data is performed by the reassembly section.
    Type: Grant
    Filed: May 30, 2001
    Date of Patent: February 21, 2006
    Assignee: Juniper Networks, Inc.
    Inventors: Souichi Kataoka, Ken Shiraishi
  • Patent number: 6982964
    Abstract: A network protocol translation device that allows serial data sent using the standard Asynchronous Transfer Mode (ATM) protocol to be used between two locations, using a satellite link or a terrestrial wireless link between the two locations. This is done by translating the standard ATM data to a standard satellite modem interface at one location, and translating the data back to the ATM format at the second (remote) location. The translation can occur at any data rate up to the available effective bandwidth of the ATM connection. The device is also capable of providing Forward Error Correction in the protocol translation. The device is functionally transparent to protocols above ATM, i.e., IP, UDP and TCP. It also interfaces with standard physical layers below ATM such as Synchronous Optical Network (SONET). At the satellite interface, the device is compatible with (but not limited to) Emitter Coupled Logic (ECL).
    Type: Grant
    Filed: October 15, 2001
    Date of Patent: January 3, 2006
    Inventor: David R. Beering
  • Patent number: 6980557
    Abstract: A switching system is connected to a communication network via a broadband access unit having a network access interface and communication terminals are connected to the communication network via hubs. The broadband access unit has conversion units allocated to the hubs, via which conversion units a bi-directional conversion between the data format of the packet-oriented communication network and a data format within the switching system is effected. Furthermore, the broadband access unit has a switching network module for combining the data to be transmitted from the conversion units to the associated hubs.
    Type: Grant
    Filed: November 2, 1999
    Date of Patent: December 27, 2005
    Assignee: Siemens Aktiengesellschaft
    Inventor: Josef Wahler
  • Patent number: 6965565
    Abstract: A system for communicating an event status across a data channel is provided. The system includes a data path to provide connectivity for a plurality of communication channels using data transport protocols. An originating device is coupled to a first location on the data path, and is operable to set an event status indicator in a control portion of a data unit. The originating device is additionally operable to communicate a data signal as one or more data units on a data channel supported on the data path. A receiving device is coupled to a second location on the data path, and is operable to detect the event status indicator in the control portion of the data unit. The receiving device is additionally operable to convert the one or more data units communicated on the data channel to a recovered data signal. The event status indicator identifying an event status, such as a buffer overflow or underflow condition, or a line status, for example.
    Type: Grant
    Filed: January 19, 2001
    Date of Patent: November 15, 2005
    Assignee: 3Com Corporation
    Inventor: Michael B. Duclos
  • Patent number: 6930998
    Abstract: A hybrid central office for serving a plurality of subscriber lines while serving as a virtual access tandem to a subnetwork of central offices having a connection to an ATM backbone network is described. The hybrid central office includes a computing module having a messaging interface to the ATM network, an inter-working trunk interface to the ATM network and a trunk connection to the PSTN. The hybrid central office serves as a tandem switch for other central offices connected to the subnetwork. Other central offices are preferably connected to the subnetwork by a signal large trunk group. All inter-office call routing is therefore handled by the hybrid central office. The hybrid central office also provides a gateway to the PSTN. Inter-office calls originated and terminated within the subnetwork are set up by the virtual access tandem but after call set up, the virtual access tandem is not involved in the call.
    Type: Grant
    Filed: December 7, 1998
    Date of Patent: August 16, 2005
    Assignee: Nortel Networks Limited
    Inventors: Dany Sylvain, Faizel Lakhani
  • Patent number: 6914900
    Abstract: Disclosed is a method of connecting a telephone via an IP network. An exchange on the originating side (1) evaluates voice quality along a route through the IP network to an exchange on a terminating side when a call originate request has been issued to connect the originating telephone via the IP network, (2) connects the originating telephone to the terminating telephone via the above-mentioned route if the voice quality is good, and (3) if the voice quality is bad, controls a connection of the telephone in accordance with a command from the caller or by selecting another route automatically such as an alternative route through the IP network or another route through a network other than the IP network.
    Type: Grant
    Filed: September 12, 2000
    Date of Patent: July 5, 2005
    Assignee: Fujitsu Limited
    Inventors: Satoru Komatsu, Masahiko Yamagishi, Tsutomu Yamada
  • Patent number: 6882652
    Abstract: Techniques for providing communication services include provisioning a packet network connection that has packet channels, each of which is independently capable of carrying narrowband signals so as to emulate a private line circuit. A narrowband private line that traverses the packet network connection using a particular one of the packet channels is established. Delays that might otherwise be introduced as a result of packetizing the narrowband signals can be reduced. Private lines that traverse the packet network connection using other packet channels can be added or removed without adversely affecting the existing lines. Additionally, a narrowband communication line that traverses a channel in a first virtual circuit connection in a packet network can be rolled over to a channel in a second virtual circuit connection in the packet network. The latter technique can improve the use of available bandwidth and can be applied to non-private line applications as well.
    Type: Grant
    Filed: August 4, 2000
    Date of Patent: April 19, 2005
    Assignee: Tellabs Operations, Inc.
    Inventors: Dale A. Scholtens, Michael J. Klemm
  • Patent number: 6873621
    Abstract: A system for controlling a bandwidth when receiving and reassembling a consecutive data stream transferred while segmented by AAL1 format cells which enables correct determination of non-P and P formats and reassembly of cells even when error arises in multiple bits including the CSI bit of an AAL1 cell or when adding dummy cells and thereby enabling prevention of a gap in data in a frame, comprising, in a data reassembly unit which reassembles received cells, an 8-cell buffer for storing 8 cells of a cycle of a sequence count (SC) of 0 to 7 and sending the cells out to a later stage after a check unit of a sequence number (SN) field confirms normalcy of the cells and a control unit for control so that the number of P format cells stored in the 8-cell buffer becomes 1 cell when 8 cells are stored in the 8-cell buffer.
    Type: Grant
    Filed: January 12, 2001
    Date of Patent: March 29, 2005
    Assignee: Fujitsu Limited
    Inventors: Jyoei Kamoi, Yoshihiro Uchida, Naoki Aihara, Mikio Nakayama, Kazuhito Yasue, Kazuhiko Kumagai
  • Patent number: 6842443
    Abstract: A network switch apparatus, components for such an apparatus, and methods of operating such an apparatus in which data flow handling and flexibility is enhanced by the cooperation among a plurality of interface processors and a suite of peripheral elements formed on a semiconductor substrate. The interface processors and peripherals together form a network processor capable of cooperating with other elements including an optional switching fabric device in executing instructions directing the flow of data in a network.
    Type: Grant
    Filed: October 23, 2001
    Date of Patent: January 11, 2005
    Assignee: International Business Machines Corporation
    Inventors: James Johnson Allen, Jr., Brian Mitchell Bass, Jean Louis Calvignac, Santosh Prasad Gaur, Marco C. Heddes, Michael Steven Siegel, Fabrice Jean Verplanken
  • Publication number: 20040246978
    Abstract: A processing system receives and processes telecommunication signaling for a user communication to determine a minimum bandwidth and a maximum bandwidth for the user communication. The processing system transfers control information indicating the minimum bandwidth and the maximum bandwidth for the user communication to a routing system. The routing system receives the control information and the user communication, and in response, transfers the user communication over a first communication path and a second communication path. The first communication path supports the minimum bandwidth, and the second communication path supports the maximum bandwidth.
    Type: Application
    Filed: July 8, 2004
    Publication date: December 9, 2004
    Applicant: SPRINT COMMUNICATIONS COMPANY, L. P.
    Inventors: Dean Boldt, Jason Torrey
  • Publication number: 20040246977
    Abstract: A point-to-point system for connecting a line card to a switching card using a transmission rate measured in gigabits per second.
    Type: Application
    Filed: June 4, 2001
    Publication date: December 9, 2004
    Inventors: Jason Dove, Brian Semple, Andre Tanguay
  • Patent number: 6791986
    Abstract: The interworking of voice information in ATM cells is presently provided according to the standardizations of the ITU in the AAL1 adaption method. Specific properties of the voice information are taken into consideration therein. For interworking and transmission of other information data, further adaption methods such as, for example, the AAL5 method are provided. Here, the specific conditions of voice transmissions are not taken into consideration. In order to be able to implement the interworking and transmission of voice information according to the AAL5 standard as well, the AAL5 header is now inventively co-linked into the AAL5 information part of an ATM cell.
    Type: Grant
    Filed: July 20, 1999
    Date of Patent: September 14, 2004
    Assignee: Siemens Aktiengesellschaft
    Inventor: Christian Hinterberger
  • Patent number: 6785377
    Abstract: A first call processing system advantageously uses a constant bit rate connection and a variable bit rate connection to utilize the bandwidth for a data call. The first call processing system receives signaling for the data call. The first call processing system then processes the signaling to generate a first instruction to set up a constant bit rate connection for the data call between the first call processing system and a second call processing system. The first call processing system processes the signaling to generate a second instruction to set up a variable bit rate connection between the first call processing system and the second call processing system. Any bandwidth that the data call does not need and use can be utilized for other calls. Thus, the performance of other calls is improved.
    Type: Grant
    Filed: January 19, 2000
    Date of Patent: August 31, 2004
    Assignee: Sprint Communications Company L.P.
    Inventors: Dean Boldt, Jason Torrey
  • Publication number: 20040160940
    Abstract: Disclosed is a digital signal processing apparatus of a communication terminal for adaptably transmitting voice data to allotted uplink channels and a voice data transmission method thereof. The digital signal processing apparatus comprises a plurality of speech coders for compressing the sampled voice data with each compression rate predetermined according to the number of packet channels capable of being allotted, a plurality of channel coders for channel-coding each set of voice data, compressed by each speech coder, according to respective predetermined codes, and a switching section, for outputting voice data which are compressed and channel-coded corresponding to the number of the allotted packet channels when packet channels are allotted.
    Type: Application
    Filed: February 13, 2004
    Publication date: August 19, 2004
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventor: Hoe-Won Kim
  • Publication number: 20040081174
    Abstract: An apparatus and method for providing direct trunking between a TDM switch and an ATM backbone network are described. The apparatus is an interface adapted to convert pulse code modulated data to ATM cells and vice versa. The interface is adapted to emulate a trunk peripheral of the TDM switch by communicating with a computing module of the switch using a messaging protocol native to the computing module. The interface may therefore be connected to the TDM switch without any modification of the computing module. The interface is connected directly to a serial link of a fabric interface of the TDM switch. The advantages include a reduction in the capital investment in equipment required to connect a TDM switch to an ATM backbone network and a reduced footprint for the equipment.
    Type: Application
    Filed: September 8, 2003
    Publication date: April 29, 2004
    Applicant: NORTEL NETWORKS LIMITED
    Inventors: Faizel Z. Lakhani, Dany Sylvain
  • Publication number: 20040081172
    Abstract: A generalized Layer-2 virtual private network arrangement and method is disclosed for layer-2 and/or layer-1 VPNs. The generalized Layer-2 VPN includes mechanisms which provide simplified provisioning and a degree of customer autonomy regarding establishing pseudo-wire connections without the assistance of the service provider across the service provider's network. The generalized Layer-2 VPN is particularly useful for overcoming the need for customers to be restricted to a particular transport or technology used within the provider network.
    Type: Application
    Filed: September 9, 2003
    Publication date: April 29, 2004
    Inventor: Hamid Ould-Brahim
  • Patent number: 6728834
    Abstract: A system and method for effectively implementing isochronous processor cache comprises a memory device for storing high-priority isochronous information, an isochronous cache coupled to the memory device for locally caching the isochronous information from the memory device, and a processor device for accessing and utilizing the isochronous information that is stored in the isochronous cache. The isochronous cache is reserved for storing the isochronous information, and may be reconfigured into a selectable number of cache channels of varying size that each corresponds to an associated isochronous process.
    Type: Grant
    Filed: January 27, 2003
    Date of Patent: April 27, 2004
    Assignees: Sony Corporation, Sony Electronics Inc.
    Inventors: Glen D. Stone, Scott D. Smyers, Bruce A. Fairman
  • Patent number: 6721327
    Abstract: A decoder improves delayed packet concealment in a packet network by using two decoder sections. A first decoder section bases its decoding during the concealment phase on erroneous filter states and a set of speech parameters, whereas a second decoder section bases its decoding on saved and updated filter states and the same speech parameters. The outputs of the two decoder sections are thereafter combined to form the final speech signal. This decoding strategy produces a speech signal with smooth transitions from delayed to non-delayed packets and uses information from the most recent packets for speech generation.
    Type: Grant
    Filed: May 14, 1999
    Date of Patent: April 13, 2004
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Erik Ekudden, Tomas Gunde Svensson, Jim Sundqvist
  • Patent number: 6721326
    Abstract: A multiplexing system in an ATM network is disclosed. The system produces low deviation in generation timing of a standard ATM cell and low transmission delay to realize high transmission efficiency. A cell multiplexing means is provided for assembling data received from a plurality of terminal lines into a short cell to be multiplexed into a standard ATM cell. A short cell is selected from a plurality of short cells to define a reference line. The short cell generation timing of the reference line is used as the reference timing to generate short cells for other lines so as to synchronize the generation timing. The short cells thus generated are then multiplexed into a standard ATM cell.
    Type: Grant
    Filed: March 13, 2000
    Date of Patent: April 13, 2004
    Assignee: Fujitsu Limited
    Inventor: Kenji Shibata
  • 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: 6687244
    Abstract: The invention is an ATM transport system that transports user information from a continuous signal transport system. The ATM transport system uses telecommunications signaling associated with the continuous signals to determine if the continuous signals are transporting any user information. If so, ATM cells containing user information are generated and transmitted, but if not ATM cells are not generated and transmitted. The invention includes an ATM interworking multiplexer and in some embodiments, a processor.
    Type: Grant
    Filed: April 7, 2000
    Date of Patent: February 3, 2004
    Assignee: Sprint Communications Company, L.P.
    Inventor: Joseph Michael Christie
  • Patent number: 6680937
    Abstract: This proposal outlines an approach for interfacing Synchronous Transfer Mode (STM) and Asynchronous Transfer Mode (ATM) networks and for transporting voice, fax and voice-band data calls by the ATM network in an efficient manner. In contrast to the well known ATM Variable Bit Rate (VBR) approach, this proposal allows one to transport 64 kb/s traffic efficiently over ATM by re-using STM network signaling and exploiting the standard AAL-1-type adaptation layer (intended for Constant Bite Rate, CBR, services). We use low bit rate encoding algorithms and achieve additional compression for speech by marking cells that do not contain talk spurts. The invention defines specific rules for STM-to-ATM interfacing, including all routing translation, and identifies necessary Terminal Adapter (TA) and ATM switch capabilities.
    Type: Grant
    Filed: October 18, 2000
    Date of Patent: January 20, 2004
    Assignee: AT&T Corp.
    Inventors: Behram H. Bharucha, Norman Farber, Thomas S. Giuffrida, Arik Kashper, Steven S. Katz
  • 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: 6674729
    Abstract: A method and system provides connections to an ATM system and includes selective echo cancellation. The invention includes two interworking units, an echo canceller, and a signaling processor. The signaling processor receives and processes signaling to provide connection control instructions to the interworking units. The first interworking unit will accept a connection, and if the connection does not require echo cancellation, interwork the incoming connection with an ATM connection to the ATM system. If the incoming connection requires echo cancellation, the first interworking unit will interwork the incoming connection with an ATM connection to the second interworking unit. The second interworking unit will interwork the ATM connection with another connection to echo cancellation. After echo cancellation, the second interworking unit will interwork the connection from echo cancellation with another ATM connection to the ATM system.
    Type: Grant
    Filed: April 11, 2000
    Date of Patent: January 6, 2004
    Assignee: Sprint Communications Company, L.P.
    Inventor: Albert Daniel DuRee
  • Publication number: 20040001494
    Abstract: Architecture for generating a playback time from a AAL2 SSCS voice packet sequence number in a stream-based application. The architecture comprises an event scheduler engine for initiating control parameters for an interpretive window associated with a packet stream; a sliding window engine for controlling the interpretive window according to the control parameters; and an arrival engine that maps the packet sequence number to an expected playback time in accordance with an association created between the packet sequence number and the expected playback time by the interpretive window.
    Type: Application
    Filed: July 1, 2002
    Publication date: January 1, 2004
    Applicant: Zarlink Semiconductor V.N. Inc
    Inventors: Craig I. Barrack, James Yik
  • Patent number: 6631116
    Abstract: The invention relates to a method of changing the size of mini cells belonging to an individual connection during an ongoing connection. A control mini cell is used for this purpose. The control mini cell is transported either in a separate connection or in the same individual connection the mini cell size of which it shall change. Depending on system design the control mini cell is handled either at the control plane by the operation and maintenance system of the telecommunication network or is it handled at the traffic plane by transmission equipments.
    Type: Grant
    Filed: January 27, 1997
    Date of Patent: October 7, 2003
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Lars Göran Vilhelm Eneroth, Karl Anders Näsman, Lars-Göran Petersen
  • Publication number: 20030179757
    Abstract: In a communication system a multimedia signal is encoded in an encoder (1) and subsequently transmitted over a packet switched network (4) to a terminal (6). The terminal (6) comprises a receiver (8) whose output is connected to a receive buffer (210). The output of the receive buffer (210) is applied to the presentation means (214) which comprises a decoder (216) and a presentation device (218).
    Type: Application
    Filed: January 5, 2000
    Publication date: September 25, 2003
    Inventors: WARNER R. T. TEN KATE, RAKESH TAORI
  • Patent number: 6621833
    Abstract: A method and system for improving the passage of silent or unused status of Ds0 channel to a data switch with a Ds0 switching capacity. The method allows the Ds0 channel source to be the only equipment that must engage a digital signal processor to remove silent and unused Ds0 channels from a Ds0 channel carrying data packet. The method provides for the Ds0 channel source, the intermediate nodes (data switches with Ds0 switching matrixes included) and Ds0 channel destination to recognize a simple and efficient means of passing suppression status of a Ds0 channel through the entire network.
    Type: Grant
    Filed: December 17, 1999
    Date of Patent: September 16, 2003
    Assignee: World Com, Inc.
    Inventor: Forrest L. Pierson, Jr.
  • Patent number: 6621792
    Abstract: A computationally-efficient traffic shaper replaces per-virtual-circuit shaping queues that all must be processed during each cell-emission period, with a sequence (130) of shaping queues (131) shared by a plurality of virtual circuits and only one of which must be processed during each cell-emission period. N shaping queues are used, where N is the maximum cell delay effected by the traffic shaper divided by the cell emission period; for constant-bit-rate narrowband virtual circuits, N is 47. Each virtual circuit is assigned one or more of the shaping queues, spaced evenly in the sequence, as its serving queues, proportionally to its size. A dequeue state machine (141) cyclically transmits the contents of a current one of the shaping queues during each period. Per-virtual-circuit instances of an enqueue state machine (140) each enqueue received ATM cells of its corresponding virtual circuit.
    Type: Grant
    Filed: February 23, 1999
    Date of Patent: September 16, 2003
    Assignee: Avaya Technology Corp.
    Inventor: Norman W. Petty
  • Patent number: 6618384
    Abstract: An ATM edge switch incorporating wireless and wireline voice and data functions is utilized to provide an integrating point for wireless and wireline communications. Functions included in the ATM edge switch are: a voice services function for voice processing functions, element management function for real time management of resources required for call processing, a call processing function for supporting calls, a mobility manager function providing access to Home Location Register/Visitor Location Register (HLR/VLR) and a network access function to consolidate traffic to and from access devices and to interface the access devices to an ATM communications network fabric.
    Type: Grant
    Filed: September 27, 1999
    Date of Patent: September 9, 2003
    Assignee: Nortel Networks Limited
    Inventor: Stephen Bennett Elliott
  • Patent number: 6578109
    Abstract: A system and method for effectively implementing isochronous processor cache comprises a memory device for storing high-priority isochronous information, an isochronous cache coupled to the memory device for locally caching the isochronous information from the memory device, and a processor device for accessing and utilizing the isochronous information that is stored in the isochronous cache. The isochronous cache is reserved for storing the isochronous information, and may be reconfigured into a selectable number of cache channels of varying size that each corresponds to an associated isochronous process.
    Type: Grant
    Filed: June 29, 2000
    Date of Patent: June 10, 2003
    Assignees: Sony Corporation, Sony Electronics Inc.
    Inventors: Glen D. Stone, Scott D. Smyers, Bruce A. Fairman
  • Patent number: 6574242
    Abstract: A local area network of devices connected to a Communication Switching Module (CSM) carry both delay-sensitive information and non-delay sensitive user data in master Ethernet packets transmitted over the LAN at a constant rate. Signaling and control information from the devices initialize a permanent virtual connection (PVC) between devices and the CSM. The signaling and control information is contained in standard Ethernet packets which are encapsulated along with non-delay sensitive data in the master Ethernet packets and performs various control functions for the LAN devices and the CSM.
    Type: Grant
    Filed: June 8, 1999
    Date of Patent: June 3, 2003
    Assignee: Merlot Communications, Inc.
    Inventors: Ronald M. Keenan, Thomas F. Barraza, Edward R. Caceres, Joseph A. Deptula, Patrick A. Evans, Joseph Setaro