Abstract: A method of managing transfer of packets in a packet digital communications network wherein at least some of the packets comprise a plurality of segments is disclosed. The method comprises providing a buffer (104) for storing segments arriving for transmission on a virtual channel, always admitting (150) a segment of a packet on a virtual channel for storage in the buffer (104) when a previous segment of the packet on said virtual channel has been admitted in the buffer (104), rejecting (149) a segment of a packet on a virtual channel for storage in the buffer when any previous segment of the packet on said virtual channel has been rejected for storage, and applying an admission criterion to each first segment of a packet on a virtual channel.

Abstract: At a transmitter, an ATM cell stream is received from the ATM layer and is distributed on a cell-by-cell bases across multiple DSL PHY's. At the receiver, the cells from each DSL PHY are re-combined in the appropriate order to recreate the original ATM cell stream, which is then passed to the ATM layer.

Abstract: A local computing endpoint (e.g., a desktop computer, a notebook computer) is used to detect the presence of and record information about one or more wireless access point within range of the local computing endpoint. The recorded information is processed by a centralized computing endpoint to determine whether any of the one or more wireless access points is a rogue wireless access point.

Abstract: Disclosed are an opened network connection control method, an opened network connection control system, a connection control unit and a recording medium, which allow only terminal units capable of securing security to be connected to an opened network, thereby improving the security level. The connection control unit acquires connection history information held by the terminal unit which has sent a request for connection to the opened network to a central unit, and assigns a logic identifier to the terminal unit and connects the terminal unit to the opened network when the contents of the acquired connection history information coincide with the contents of connection condition information record.

Abstract: Offering vertical services to subscribers and service providers is an avenue to immediately improve the competitiveness of digital subscriber line access service, for example of the type offered by a local exchange carrier. To deliver high-quality vertical services, however, the underlying ADSL Data Network (ADN) or the like needs to establish Quality of Service (QoS) as a core characteristic and offer an efficient mechanism for insertion of the vertical services. The inventive network architecture introduces QoS into the ADN, in a manner that enables the delivery of sophisticated and demanding IP-based services to subscribers, does not affect existing Internet tiers of service, and is cost-effective in terms of initial costs, build-out, and ongoing operations.

Abstract: Example scalable multi-protocol label switching (MPLS) based virtual private networks (VPNs) and methods to implement the same are disclosed. A disclosed example spoke provider edge (PE) router for an MPLS-based VPN includes a truncated virtual routing and forwarding (VRF) table containing a first value referencing a hub PE router and a second value referencing a first customer edge (CE) router coupled to the VPN via the PE router, and a forwarding module to forward a packet received from the first CE router to the hub PE router when the packet contains an address referencing a second CE router coupled to the VPN via a second spoke PE router.

Abstract: In at least one embodiment of the disclosure an electronic device includes a search unit configured to search wireless communication devices for channels provided for establishing an ad hoc network. A measuring unit is configured to measure a receiving level of wireless signals received from the devices found by the search. An allocation unit is configured to generate an allocation result for the channels by adding a predetermined weight to each of the channels based on the strength of the measured receiving level of the wireless signals. A calculating unit is configured to calculate a radio interference power for each of the channels based on the allocation result obtained by the allocation unit. An establishing unit is configured to select the channel having a smallest radio interference power as calculated by the calculating unit and establish the ad hoc network for the selected channel.

Abstract: A data stream transmission/reception device manages external devices in at least two groups, assigns independent resources to the groups, and for each group, a connection is made to the assigned hardware resource via a preferentially-used plug. This enables handling a plurality of streams at the same time in the case of being connected to a plurality of conventional external devices that have only one logical plug.

Abstract: Method and system for providing access layer satellite architecture in a data network including receiving a data packet from an access layer network device, the data packet including a Virtual Local Area Network (VLAN) identifier associated with a port on the access layer network device, performing a route lookup procedure based on the received data packet to determine a destination of the data packet, updating an ARP table with a Media Access Control (MAC) address associated with the VLAN identifier and the port of the received data packet, and transmitting the data packet to a destination network device, is disclosed.

Abstract: A method for formatting a signal in a mobile communication system by appending a plurality of medium access control headers to a plurality of medium access control-service data units for data transfer between a mobile station and network in the mobile communication system. If the service data units have the same characteristics, a medium access control-protocol data unit is formed by successively coupling the service data units to any one of the medium access control headers. If the service data units have different characteristics, the protocol data unit is formed by sequentially coupling each of the service data units and each of the medium access control headers. The formed protocol data unit is then transformed into a transport block with a predetermined size.

Abstract: To use the memory space more effectively, cell memory can be shared by an input link and all output links. To prevent one flow from occupying the entire memory space, a threshold may be provided for the queue. The queue threshold may accommodate the RTT delay of the link. Queue length information about a downstream switch module may be sent to an upstream switch module via cell headers in every credit update period per link. Cell and/or credit loss may be recovered from. Increasing the credit update period reduces the cell header bandwidth but doesn't degrade performance significantly. Sending a credit per link simplifies implementation and eliminates interference between other links.

Abstract: An ATM (asynchronous transfer mode) cell transfer apparatus includes an input interface, a switch block, and an OAM cell processing hardware block having a memory unit. The input interface receives an SDH/SONET signal on each of a plurality of first transfer paths to output an input OAM cell corresponding to the SDH/SONET signal to one of a plurality of input ports of the switch block corresponding to the first transfer path for the SDH/SONET signal to be transferred. The switch block receives the input OAM (operation and maintenance) cell from the corresponding input port as an OAM input port to output to the OAM cell processing hardware block together with a port number of the OAM input port, and receives at least one output OAM cell from the OAM cell processing hardware block to output to at least one of the plurality of output ports based on the received output OAM cell.

Abstract: In one embodiment, a bridge in a computer network may execute a spanning tree protocol (STP) for network topology and a registration protocol for traffic control of virtual connections (e.g., EVCs) at the bridge. For any gateway ports of the bridge inter-connected with a provider network, the bridge may generate “fake” received registration protocol join messages for a particular virtual connection at the gateway port. The bridge may then either i) propagate the join messages, in response to the gateway port being in a forwarding state according to the STP, on other forwarding ports of the bridge, or ii) in response to the gateway port not being in a forwarding state, block propagation of the join messages to other ports of the bridge.

Abstract: A method is provided for sending at least a first data signal and a second data signal, the data being divided into data blocks of fixed size including a header field of predetermined size, the data signals being sent to at least one data processing device adapted to apply a cyclic autocorrelation function with parameter k enabling the first and second data signals to be identified. The value of the parameter k is a function of a ratio between the size of the data blocks and the predetermined size of the header field. The method includes modifying the size of the header field of the data blocks before sending the first data signal, the value of the parameter k and the size of the data blocks remaining unchanged. A method is also provided for processing signals sent in accordance with the sending method.

Abstract: At a transmitter, an ATM cell stream is received from the ATM layer and is distributed on a cell-by-cell bases across multiple DSL PHY's. At the receiver, the cells from each DSL PHY are re-combined in the appropriate order to recreate the original ATM cell stream, which is then passed to the ATM layer.

Abstract: A packet communication system includes a first communication apparatus and a second communication apparatus. The first communication apparatus generates one or more data packets each having its data volume not more than a prescribed data volume, and transmits the generated data packets to the second communication apparatus. The second communication apparatus receives the data packet transmitted from the first communication apparatus, in order of transmission. The first communication apparatus generates the data packets to be transmitted to the second communication apparatus such that one of the data packets to be last transmitted is a short packet having its data volume less than the prescribed data volume, and each of the data packets other than the data packet to be last transmitted has its data volume equal to the prescribed data volume. The second communication apparatus determines whether or not the data packet received each time is a short packet.

Abstract: One embodiment provides a system for forwarding packets with hierarchically structured variable-length identifiers (HSVLIs), wherein the computer includes a processor. During operation, the system converts an HSVLI into a number of fixed-length addresses, wherein the HSVLI indicates a piece of content and is hierarchically structured, and comprises contiguous components ordered from a most general level to a most specific level. In addition, the length of a respective HSVLI is not fixed. The system further performs an effective longest-prefix-match lookup by performing multiple exact-match lookups based at least on the fixed-length addresses.

Abstract: To provide a stable high speed wireless network, the relay process is solved at the lower layers (PHY layer, MAC layer) without depending on upper layers to reduce the load of the upper layers to the utmost. Discrimination is made between a packet of one's own station and a relay packet to process the presence and absence of the relay packet without using a CPU to construct a wireless network executing the relay processing at a high speed. Further, the retransmission is executed without using a CPU to provide a stable wireless network. In addition, the table for relay process (routing table) is constantly updated to add to the table the information of the packets of which processes are not executed to eventually suppress unnecessary processes.

Abstract: A method and system for automatically generating and maintaining Asynchronous Transfer Mode (ATM) addresses is provided. The method includes receiving a request from a requestor that includes an element identifier corresponding to a network element to be ultimately associated with the ATM address, validating the request, providing a unique identifier that corresponds to the network element, grouping the unique identifier with a set of parameters to create the ATM address without user intervention, and storing the ATM address in a repository. The system includes a Graphical User Interface (GUI) for receiving one or more parameters to be used to generate the ATM address and a set of computer-useable instructions accessible by the GUI that perform a method for generating the ATM address without user intervention based in part on the one or more parameters.

Abstract: A clock supply device includes a receiving unit configured to receive frame synchronization packets from an asynchronous network and generate timing signals; a phase comparing unit configured to perform phase comparison by comparing phases of the timing signals generated by the receiving unit and clock signals generated by an internal oscillating unit; a phase variation detection unit configured to detect a frequency variation of the frame synchronization packets based on a trend of a variation amount of a phase difference that is obtained by performing a statistical process on count values obtained as a result of the phase comparison; and an oscillating frequency control unit configured to control an oscillating frequency of the internal oscillating unit when the phase variation detection unit detects the frequency variation of the frame synchronization packets.

Abstract: A destination router label is added to Pseudo Wire encapsulated data packets for crossing a Multiple Protocol Label Switching (MPLS) network. Data arrives at a PW function, which performs PW encapsulation, further adding a PWE control word and a PWE label. The PW function also adds a destination router label (DRL). The DRL is configured at PW creation time with a PW control message (that is, an unsolicited LabelMap message) to a specific edge router. The packet may then be sent to a Traffic Engineering (TE) function, which uses the DRL to make the routing decision for the packet. The routing decision includes adding a PSN tunnel label to replace the DRL label for crossing the transport network. The rest of the processing is conventional PWE3 transport on MPLS; that is, when the packet is received at a second PW function, it removes the PW encapsulations and forwards the packet based on the contents of the PWE label.

Abstract: A method for xDSL hybrid access includes: receiving pseudo cells and standard ATM cells from a subscriber terminal; wherein the pseudo cells carry VDSL data and the standard ATM cells carry ADSL data; reassembling the standard ATM cells into ADSL data frames and reassembling the pseudo cells into VDSL data frames; and transmitting the ADSL data frames and the VDSL data frames to a network side device. A DSLAM for xDSL hybrid access is also provided. The solution proposed may implement the hybrid access of DSL of the ADSL family and the VDSL family.

Abstract: The disclosed invention relates to a re-synchronization system that operates in a switching arrangement receiving a plurality of incoming data packets. The switching arrangement is made of an active switch card that transmits the incoming data packets and a backup switch card that may be re-activated by an operator after replacement. The re-synchronization system is implemented in each switch card. When the backup switch card is re-activated, both switch cards receive the incoming data packets and the system of the invention allows to re-synchronized both switch cards by controlling the transmission of the incoming data packets out of each switch card until the same data packets are transmitted. The re-synchronization system further comprise storage for storing the incoming data packets and detector for detecting a re-synchronization information among the incoming data packets.

Abstract: A method for retaining network address of a wireless client device as the device roams between different access points operably connected to a single gateway is described. An embodiment comprises maintaining a table in the gateway memory containing the unique identifier of the wireless client device sent with each data packet. In addition to, the unique identifier, an entry in the table in the gateway memory includes the communication pathway established between the gateway and the wireless client device. When forwarding a data packet from the WAN to the wireless client device, the gateway uses the table in the gateway memory to determine the correct destination path for the data packet instead of relying on the destination address attached to the data packet.

Abstract: In order to provide a network element for switching time-division multiplex signals in a transport network, which allows higher capacity at moderate equipment costs, the network element has a number of input ports (I; IO1-IO8), a number of output ports (O; IO1-IO8) and a switch fabric ( ) SF; 58) interconnecting the input and output ports (IO1-IO8). The switching fabric ( ) SF; 58) is a cell based switch comprising one or more switch modules ( ) SE1-SEn) which are adapted to switch fixed-length cells on the basis of addresses contained in cell headers of the cells. The input ports (I) contain a segmentation device (11) for segmenting an input time-division multiplex signal into fixed-length cells and assigning address information to each cell. The output ports (O) contain a reassembly device (14) for reassembling cells received from said switch fabric (SF; 58) into an output time-division multiplex signal. The address information contains a fabric address (H1, H2) and a TDM address (P0, P1).

Abstract: A method and structure are disclosed for dispatching appropriate data to a network processing system comprising an improved technique for extracting protocol header fields for use by the network processor. This technique includes basic classification of a packet according to the types of protocol headers present in the packet. Based on the results of the classification, specific parameter fields are extracted from corresponding headers. All such parameter fields from one or more protocol headers in the packet are concatenated into a compressed dispatch message. Multiples of such dispatch messages are bundled into a single composite dispatch message. Thus, selected header fields from N packets are passed to the network processor in a single composite dispatch message, increasing the network processor's packet forwarding capacity by a factor of N.

Abstract: A data processing device connected with a data supply device for performing predetermined data processing includes: a communication control unit for controlling communication with the data supply device; a data processing unit for performing the data processing based on input data received from the data supply device; and a device control unit for performing predetermined processing in correspondence with command data received from the data supply device based on the command data. The communication control unit receives the input data and the command data each of which is contained in a packet having a common fixed length from the data supply device. When an identification part at a predetermined position in the reception packet received from the data supply device is set at a predetermined command identification value indicating the command data, the communication control unit supplies data contained in the reception packet to the device control unit.

Abstract: A method for sharing an aggregate bandwidth among a group of traffic classes may include allocating a portion of the aggregate bandwidth to one of the group of traffic classes having a first priority associated therewith, where the allocated portion is referred to as a first bandwidth. The method may include allocating an unused portion of the aggregate bandwidth to a second one of the group of traffic classes having a second priority associated therewith in conjunction with a parameter associated with a downstream device.

Abstract: A method and apparatus for processing data in a Controller Area Network (CAN) are discussed. In an embodiment of this invention, dummy data is added to data to be transmitted via a CAN message, and information indicating that the dummy data is added is transmitted via the CAN message. A length of the dummy data is determined such that data to be transmitted via the CAN message becomes a predetermined length, and data in which five or more successive bits do not have a same value is added as the dummy data. The information is included in a field indicating a length of data to be transmitted via the CAN message, and is indicated by a value within a reserved range of the field. Accordingly, data processing efficiency can be improved, and flexible CAN communication can be performed via the CAN message.

Abstract: Origination and incoming are regulated for each service in user units. An origination filter table stores contract service information indicating whether or not each service can be used and the maximum number of sessions that can be activated by the originator corresponding to each originator identifier (for example, SIP-URI). An incoming filter table stores incoming enable/refusal information and an originator identifier from which incoming is enabled or refused corresponding to each receiver identifier. A communication control section references the contract service information and the maximum number of sessions in the origination filter table based on the originator identifier in the message received from a communication terminal, determines whether or not the service indicated by service type information in the message can be used, and determines whether or not a new session can be established.

Abstract: An interactive system is provided to help an operator locate the source of a data fault in an Asynchronous Transfer Mode (ATM) network. A database stores information related to data types and subsystems used by the ATM network. A processor coupled to the database uses the information stored therein to formulate a series of queries related to a selected one of the subsystems using the data type experiencing a data fault. The series of queries have a hierarchal order that sequentially inquire about operational status of the various subsystems having a relationship with the data type experiencing the data fault. A graphical user interface (GUI) coupled to the processor displays each query in accordance with the hierarchal order thereof. The GUI simultaneously displays identification of the various subsystems having a relationship with the data type experiencing the data fault.

Abstract: A digital broadcasting system and a method for controlling the same are disclosed. A method for controlling a digital broadcast receiving system includes the steps of receiving a broadcast signal having mobile service data and main service data multiplexed therein, extracting transmission parameter channel (TPC) signaling information and fast information channel (FIC) signaling information from a data group within the received mobile service data, by using the extracted fast information channel (FIC) signaling information, acquiring a program table describing virtual channel information and service of an ensemble, the ensemble being a virtual channel group of the received mobile service data, by using the acquired program table, detecting a descriptor defining basic information required for accessing the received service, and, by using the detected descriptor, controlling the receiving system to enable access to the corresponding service.

Abstract: A method and apparatus for emulating VPLS within an ATM network. Provider Edge devices are configured for VPLS connections. For each pair of provider edge devices supporting the same VPLS ID, one device establishes a virtual circuit between the pair. Thus, a full mesh of virtual circuits is established between provider edge devices, and a VPLS-like service can be offered to users without having to implement MPLS. Establishing the virtual circuits within a PNNI hierarchy maybe facilitated by each provider edge device propagating through the hierarchy an information group containing an association between the ATM address of the device and a VPLS ID, so that each provider edge device learns all ATM addresses to be associated with each VPLS ID. The method of advertising ATM addresses can be applied to other services requiring a number of interconnections between provider edge devices, such as Virtual Private Networks.

Abstract: A source node receives related frames of data to be transmitted from the source node to a destination node and places the frames in a queue. The queue is associated with a communication path over which the related frames are to be transmitted to the destination node. An interface that couples the source node to the communication path receives an indication directed to the source node of traffic congestion in the communication path. In response, the source node controls the rate at which the related frames of data are transferred from the queue to a transmit buffer accessible to the interface, in order to relieve the traffic congestion in the communication path.

Abstract: This invention relates to a telecommunications system for transmitting multimedia messages from a first telecommunications terminal to a second telecommunications terminal via a telecommunications network. The inventive system comprises a message server provided for receiving the messages from the first terminal and for transmitting them to the second telecommunications terminal. The message server comprises means for developing a message broadcasting program to be downloaded by the second terminal for broadcasting the messages according to the characteristics of said second terminal.

Abstract: Middleware is provided as a control plane for WiMAX control messaging. Each ASN in a WiMAX system is associated with a Session Initiation Protocol (SIP) server. A plurality of Functional Entities (FEs) are distributed across the ASNs, wherein each FE (or a group of FEs) associated with a SIP agent. Each FE is operable to control a function associated with a subscriber station (SS). The function controlled by a first FE is transferred to a second FE by employing the SIP agents to establish a SIP session between the first and second FEs. WiMAX control messages are then exchanged over the established session to transfer the SS function from the first FE to the second FE. The first and second FEs may be in the same ASN—i.e. the SS mobility is intra-domain—or, the first and second FEs may be in different ASNs—i.e. the SS mobility is inter-domain.

Abstract: An ATM (asynchronous transfer mode) cell transfer apparatus includes an input interface, a switch block, and an OAM cell processing hardware block having a memory unit. The input interface receives an SDH/SONET signal on each of a plurality of first transfer paths to output an input OAM cell corresponding to the SDH/SONET signal to one of a plurality of input ports of the switch block corresponding to the first transfer path for the SDH/SONET signal to be transferred. The switch block receives the input OAM (operation and maintenance) cell from the corresponding input port as an OAM input port to output to the OAM cell processing hardware block together with a port number of the OAM input port, and receives at least one output OAM cell from the OAM cell processing hardware block to output to at least one of the plurality of output ports based on the received output OAM cell.

Abstract: An ATM network traffic shaper is implemented in hardware. The traffic shaper shapes transmit data on one or more virtual circuits (VCs) according to the specified quality of service (QoS) parameters. Thus, the traffic shaper provides for the delivery of associated data cells in accordance with the specified QoS parameters. The traffic shaper is scalable in that the number of supported VCs can be increased with a relatively small increase in the size of the device and associated logic gates. The traffic shaper supports constant bit rate (CBR), variable bit rate (VBR), and unknown bit rate (UBR) service types and generates cell transmit requests with zero cell delay variation (CDVT). The traffic shaper also provides very high resolution in terms of bit rate specification. Varying shaping resolutions are achieved by varying a shaping interval time (SIT) generated by a SIT counter.

Abstract: Embodiments of the present invention are directed to a method and apparatus for the identification or discovery for properties of MPLS networks through a modeling technique. Aspects of the present invention provide for discovering or identifying the Label Switched Paths in MPLS networks. The method comprises the steps of representing a network by a model comprising a plurality of configuration non-specific first object classes that are representations of types of components associated with the network components, and a plurality of configuration non-specific second object classes that are representations of relationships among the representation of types of component, identifying instances of a first one and a second one of the types of components object class, and identifying the label switch path by traversing the instances of the first and second types of components object classes through select ones of the relationship object classes associated with the first and second type of components object classes.

Abstract: Disclosed are exemplary techniques for compressing ATM cells by substituting reduced headers for the original headers. A header table may be maintained at the transmitting end whereby headers are stored in table entries based on a table index generated from a hash function applied to the headers. A copy of the header table may be maintained at the receiving end and may be updated by populating idle cells with header table contents. Upon receipt of a reduced ATM cell at the receiving end, the reduced header may be replaced with a full header obtained from the copy of the header table maintained at the receiving end. The present invention further provides techniques for registration and management of hash collisions.

Abstract: A base station, in a mobile communication network, includes a receive component to receive, from a higher rank station in the network, a particular data unit that includes multiple data units multiplexed together; a master processor to determine that the first portion of the particular data unit is destined for the base station and that the second portion of the particular data unit is not destined for the base station, and discard the second portion of the particular data unit; and a slave processor to determine that the second portion of the particular data unit is destined for the other base station and that the first portion of the particular data unit is not destined for the other base station, and send the second portion of the particular data unit to the other base station.

Abstract: This invention further features a method of apportioning channels in a programmable multi-source, multi-destination system, the method including determining the source for each channel by: a) computing the sum of the number of channels carried by the current and all preceding sources, b) computing a source identifier for each channel based on the computed sum of the number of channels carried by the current and all preceding sources, determining which section of the source the channel is located based on the computed source identifier, and determining the destination for each channel by: a) computing the sum of the number of channels carried by the current and all preceding destinations, and b) computing a destination identifier of the first channel sent to each destination based on the computed sum of the number of channels carried by the current and all preceding destinations.

Abstract: A mobile communications base station has a service quality detection unit that monitors and measures communication qualities of wireless terminals currently located in the service area, and a packet classification unit that classifies packets addressed to the wireless terminals into two or more groups based on the measured communication qualities. The base station also has a buffering delay measuring unit that measures buffering delay of the packets for each of the groups. A transmission priority detection unit of the base station determines the order of priority for transmitting the packets based on the measured buffering delay in comparison with a prescribed threshold value. A resource allocation unit of the base station allocates the radio resources to the packets based on the order of priority to transmit the packets to the associated wireless terminals.

Abstract: A data transmission method includes a step of dividing each data into two or more low-speed data so as to create two or more sequences of low-speed data which are separated by no-signal intervals, a step of adding a fixed pattern for detecting a head or an end of each low-speed data included in each of the two or more sequences of low-speed data to each of the no-signal intervals included in each of the two or more sequences of low-speed data so as to create two or more sequences of fixed-pattern-added low-speed data, and a step of transmitting the two or more sequences of fixed-pattern-added low-speed data to the transmit station connected to the other network.

Abstract: Approaches are disclosed for switching transport protocol connection keys. A first node sends a keychange request message to a second node, causing the second node to accept subsequent messages digitally signed with a first or second key. The second node sends an acknowledgment message to the first node, causing the first node to accept subsequent messages digitally signed with the first or second key. The first node receives a new message digitally signed with the second key from the second node and determines that there are no remaining messages to be received digitally signed with the first key. In response thereto, the first node only accepts messages digitally signed with the second key and sends a message signed with the second key to the second node, causing the second node to only accept messages digitally signed with the second key.

Abstract: The present invention discloses a performance management system, apparatus and method between a Residential Gateway (RG) and a Broadband Remote Access Server (BRAS), the method thereof includes: configuring an OAM IWF for the protocol conversion between the performance management message of the Asynchronous Transfer Mode (ATM) Operation, Administration and Maintenance (OAM) protocol or the point-to-point Ethernet OAM protocol and the performance management message of the service layer Ethernet OAM protocol in a Digital Subscriber Line Access Multiplexer (DSLAM), when the performance management is performed in a broadband IP network, after the OAM IWF configured in the DSLAM performing the protocol conversion of performance management message, performing the end-to-end performance management between an RG and a BRAS according to the performance management message with the converted protocol.

Abstract: A method and apparatus for monitoring and detecting strings of interest to effect intrusion detection, packet filtering, load balancing, routing, and other network-related operations.

Abstract: A system and a method to avoid packet traffic congestion in a shared-memory switch core, while dramatically reducing the amount of shared memory in the switch core and the associated egress buffers, is disclosed. According to the invention, the virtual output queuing (VOQ) of all ingress adapters of a packet switch fabric are collapsed into its central switch core to allow an efficient flow control. The transmission of packets from an ingress buffer to the switch core is subject to a mechanism of request/acknowledgment. Therefore, a packet is transmitted from a virtual output queue to the shared-memory switch core only if the switch core can actually forward it to the corresponding egress buffer. A token based mechanism allows the switch core to determine the egress buffer's level of occupation. Therefore, since the switch core knows the states of the input and output adapters, it is able to optimize packet switching and to avoid packet congestion.

Abstract: An SVC is established between a client and a host by dynamically configuring a host CPE device using a custom module designed for the host CPE device. The configured host CPE device enables communication between the client and the host via the SVC connection.

Abstract: A system operable to communicate time-division multiplexed information and asynchronous transfer mode cells includes a primary rate switching fabric operable to receive a first plurality of transport signals and to switch the first plurality of transport signals at a first level, a sub-rate switching fabric operable to receive a second plurality of transport signals carrying time-division multiplexed information and to switch the second plurality of transport signals at second level that is a more granular level than the first level, and an asynchronous transfer mode switching fabric operable to receive a third plurality of transport signals carrying asynchronous transfer mode cells, and to switch asynchronous transfer mode cells among the third plurality of transport signals carrying asynchronous transfer mode cells.