Abstract: A system and method are disclosed for determining when to set up or tear down such a temporary transit path so that temporary transit paths are set up when they are needed and torn down when they are no longer needed. A temporary transit path is set up when the bit rate exceeds a first threshold. The temporary transit path is torn down when the bit rate is less than a second threshold. The temporary transit path is set up or torn down between a source station's router and a next hop router. The temporary transit path is set up within a subnetwork that includes the source station, the next hop router, and an intermediate router that is interconnected by a plurality of permanent transit paths to the source station and the next hop router. In one embodiment, a method for creating a temporary path for data packet transmission in the subnetwork is disclosed. Transmission of the data packets is initiated over the permanent transit paths that are coupled between the source station and the next hop router.

Abstract: Data is transferred between a plurality of networks which are not synchronized in clock with each other, without creating either an overflow or an underflow. Data output from a first DVCR is transferred to a second DVCR via a first IEEE-1394 serial bus, a first ATM/IEEE-1394 data transfer apparatus, a first UNI, a first ATM network, an NNI 101, a second ATM network, a second UNI, a second ATM/IEEE-1394 data transfer apparatus, and a second IEEE-1394 serial bus. The second ATM/IEEE-1394 data transfer apparatus stores data in a buffer for each flow and deletes or inserts an empty packet depending upon the amount of data stored in the buffer so as to prevent an overflow and an underflow. A deviation of a time stamp caused by the insertion or the deletion of the empty packet is gradually corrected.

Abstract: A method and apparatus for managing an information routing information base is described. A method comprises managing a routing information base (RIB), the RIB including a first set of elements that indicate a set of destinations, a second set of elements that indicate a set of next hops, a third set of elements that indicate a set of interfaces, receiving a message that indicates a modification to a plurality of routes corresponding to a plurality of the first set of elements, and modifying a first relationship between one of the second set of elements and a first one of the third set of elements and a second relationship between the one of the second set of elements and a second one of the third set of elements in accordance with the message, the one of the second set of elements referenced by the plurality of the first set of elements.

Abstract: A method and apparatus for providing orthogonal spot beams (14a, 14b), sectors (16a, 16b), and picocells (18), by using orthogonal auxiliary pilots and different Walsh traffic channels in adjacent areas. According to the IS-95 standard, the pilot signal is covered with the 64-chip Walsh sequence zero. Designating the 64-chip all zeros Walsh sequence as P and the 64-chip all one sequence as M, additional pilot signals are provided in the present invention by concatenating the P and the M sequences. Thus, for two pilot signals, pilot Walsh sequences of PP and PM can be used. For four pilot signals, pilot Walsh sequences of PPPP, PMPM, PPMM, and PMMP can be used. In general, the required number of pilot Walsh sequences can be generated by substituting each bit in an K-bit Walsh sequence with the 64-chip all zeros P or all ones M sequence, depending on the value of that bit.

Abstract: Mechanisms, in a transmission channel shared by 802.11 systems and HIPERLAN/2 systems are provided to prevent 802.11 terminals from transmitting during time periods allocated to HIPERLAN, so that a single channel can be shared between the two standards. In a particular embodiment, a “super frame” format is used where HIPERLAN transmissions are offered the highest level of protection possible within 802.11, which is needed within the 802.11 Contention Free Period (CFP).

Abstract: A switching system. The system includes I input port mechanisms which receive packets from a communication line and have a width, where I is greater than or equal to 1 and is an integer. The system includes O output port mechanisms which send packets to a communication line and have a width, where O is greater than or equal to 1 and is an integer. The system includes a carrier mechanism along which packets travel. The carrier mechanism has a width wider than the width of the input and output port mechanisms. The carrier mechanism is connected to each input port mechanism and each output port mechanism. The system includes a memory mechanism in which packets are stored. The memory mechanism is connected to the carrier mechanism. The system includes a mechanism for providing packets to the memory mechanism though the carrier mechanism from the input port mechanisms.

Abstract: A network management system has a bus and a system controller connected to the bus. The bus has a plurality of fixed ports, where each of the ports is capable of connecting a router card to the system controller. A method of sending a file from the system controller to a router card includes receiving a request packet from the router card where the request packet includes a file type and the port address, identifying the file from the file type and the port address, and sending the file to the router card. The system controller has a memory storing the location of files associated with each of the port addresses, a request receiver for receiving a request for a file of a file type from a router card, an identifier for identifying a file, and a sender for sending the identified file to the router card.

Abstract: A home agent assigns disjoint ranges of port numbers to mobile nodes that share a global IP address. In response to a registration request message from a mobile node, the home agent transmits to the mobile node its assigned range of port numbers, as an extension to a registration reply message. The home agent maintains data records for the mobile nodes that have registered with it, wherein a data record for a mobile node includes its global IP address, its assigned range of port numbers, and its current address. When the home agent receives data packets destined for one of these registered mobile nodes, as determined from the destination address and destination port number specified in the data packets, the home agent forwards the data packets to the current address listed in the mobile node's data record.

Abstract: Unicast endpoint clients (110, 111, 115) on an IP Unicast network (107, 108) are provided access to Multicast sessions on an IP Multicast network (101) through a Multicast-Unicast gateway server (120, 121). The server obtains information about sessions on the Multicast network and makes such information available to a Unicast client on the Unicast network upon request by the client. Upon being presented with a list describing the subject matter of each session, the user at the Unicast client selects the session to which he or she wants to join, which causes the Multicast-Unicast server to join the appropriate session on behalf of the requesting client for each media type in which the joining client wants to be a participant. The server then sets a bi-directional Unicast User Datagram Protocol (UDP) stream between itself and the client. All packets then received by the server from the Unicast client are address-translated to the appropriate Multicast session address.

Abstract: A transmitter is provided for simultaneously transmitting a plurality of signals in a plurality of directive beams to corresponding destination stations, each destination station located in a separate fan within a service area. The transmitter includes a plurality of beamformers, each beamformer receiving one of the signals to be transmitted to an associated fan, each of the beamformers having a plurality of outputs for each different signal to be transmitted. A plurality of Butler matrices each receive one of the plurality of outputs from the plurality of beamformers for each different signal to be transmitted, each Butler matrix having a plurality of outputs in phased relationship to one another, wherein each of the signals to be transmitted is simultaneously provided across the outputs of each Butler matrix in a phased relationship.

Abstract: A virtual wireless local area network system and method utilizing impulse radio wherein transmission rates (bit rates) can vary according to the impulse radio transmission quality (signal to noise ratio) and wherein the position of the user can be determined and said user can be directed to an area of greater transmission rates and wherein a plurality of impulse radio portals can be utilized and switched between to maintain high levels of transmission rates while a user is moving within a predetermined area.

Abstract: Methods and apparatus are presented for supporting the transmission of variable-rate vocoder frames over non-compatible communication channels. Variable-rate vocoder frames are reformatted as cargo in multi-rate vocoder frames. At the receiver, a determination is made as to whether a received multi-rate vocoder frame carries a variable-rate vocoder frame cargo. If a variable-rate vocoder frame is cargo, then a determination of the frame type is made. Various embodiments for conveying cargo information are presented.

Abstract: Method, apparatus, and system for exchanging information in a communication system having a plurality of transmission schemes are presented. A first power level is selected at which slices of information are capable of being exchanged over a communication link at a first slice rate. A first transmission scheme is selected that produces an acceptable link performance when exchanging information over the communication link at the first power level. The first power level is reduced to a second power level. A second transmission scheme is selected for exchanging information over the communication link at the second power level that produces at least the acceptable link performance produced when exchanging information over the communication link at the first power level using the first transmission scheme. Slices of information are exchanged over the communication link at the second power level and at a second slice rate using the second transmission scheme.

Abstract: There is disclosed a system and method wherein signals generated by a mobile station and received at multiple base transceiver stations (BTSs), are combined utilizing signal processing techniques. Signals received at non-target BTSs are directed, by each non-target BTS, to a target BTS where a combiner is utilized to assemble the received signals (bits) into a packet, or frame, and to determine if an error condition exists. The error condition of the frame or packet determines whether to utilize BTS power control circuitry to notify the mobile station to adjust the mobile station transmit power up or down.

Abstract: A method for encapsulating and decapsulating information into a data packet being transmitted through a plurality of switches. The method has the steps of receiving a data packet in a first switch for transmission to a second switch and encapsulating information into a field of said data packet so that the information, when encapsulated into the data packet, does not increase the size of the data packet. The method also has the steps of transmitting the data packet having the information encapsulated in the data packet to the second switch and receiving the data packet having the information encapsulated in the data packet in the second switch. The final step is the step of decapsulating the information encapsulated in the data packet.

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.

Abstract: The present invention relates to a communications stack, for connection management in a communications system. The communications system consists of at least two communicating application programs. Both application programs communicate over a connection via the communications stack. The communication stack comprises a connection resetting means that is adapted to reset the connection by closing all connection involved elements, a signal reception means that is able to receive at least one signal for managing said connection and a connection persisting means that is adapted to keep the connection persistent. The communications stack additionally contains a decision means that is adapted to delay the reset of the connection if a terminated application signal is received via the signal reception means.

Abstract: In general, in one aspect, the disclosure describes a method for use in packet processing. The method can include receiving at least a portion of at least one packet and, based on the at least a portion of the at least one packet, determining a clock signal to provide to processing logic that processes the at least one packet.

Abstract: A method for testing a voice gateway includes the operation of transmitting a first series of network packets containing test data from test equipment to a network interface of the voice gateway. After the test data has been converted by the voice gateway from a network format to a telephony format and then converted back to a network format, the test equipment receives a second series of network packets containing the test data. The test equipment then analyzes the test data in the second series of network packets to determine performance characteristics of the voice gateway. The operation of analyzing the test data may include the operation of identifying bytes from the test data with byte values that represent idle insertion by a telephony interface and/or the operations of determining elapsed time between transmission and reception of the test data by the test equipment.

Abstract: Converters and a corresponding method for converting serial data to parallel format and vice versa, particularly for use in switches for telecommunications applications. The converters comprise a storage element associated with each serial channel and comprising two arrays of storage elements. At any one time, the storage elements are accessed sequentially while those of the other array are accessed in parallel. A data bus, divided into portions by buffers, connects the by buffers, connects the serial channel to all storage cells in an associated storage element. For serial to parallel conversion, the buffers latch data from one bus portion to the next in accordance with a write cycle during which one storage element is written. Writing commences from the bus portion furthest from the incoming serial channel and storage elements on either side of a buffer are written simultaneously. The resulting delay between writing arrays words allows checking of the data such as synchronization.