Abstract: A packet transfer device has a layer 2 switch and performs switching by referring to header information of a 3rd layer and higher layers. Input/output ports receives packets from and transmits packets to other devices connected to the packet transfer device. A header information extracting circuit extracts header information belonging to a 3rd layer (network layer) and higher layers of a network protocol from packets inputted from the respective input/output ports. A table stores header information and control information corresponding to the header information in association with each other. A control information acquiring circuit acquires control information corresponding to the header information extracted by the header information extracting circuit from the table. A processing circuit processes packets based on the control information acquired by the control information acquiring circuit.

Abstract: A synchronization procedure for a multipoint-to-point CDMA network (2), which minimizes the influence on the information transmission. Instead of interleaving communications and synchronization signals timewise, a simultaneous emission is proposed, in which the synchronization signals are superimposed on the communications signals. The synchronization signals are coded with a special synchronization code (6), which does not correspond to the CDMA communications code of the information signals, e.g Barker code. In addition, the synchronization signals are sent at a lower amplitude compared with the communications signals. The synchronization signals are also modulated (7) prior to sending, in particular using alternating multiplication by +1 and ?1. On the receiving side (3), the synchronization signals are detected by demodulation (12; 15), correlation (13; 16) and subsequent accumulation.

Abstract: An apparatus and method for forwarding data on a network are described. A label-switching subnetwork within the network includes an ingress node and an egress node coupled to source and destination nodes, respectively, on the network. The ingress node sends a signal along a route within the subnetwork through a plurality of subnetwork nodes to the egress node. In response, the subnetwork nodes transmit response signals back along the route toward the ingress node which define the route through the subnetwork and simultaneously allocate a plurality of paths within the route. A single path can be selected for forwarding of data packets associated with a source/destination pair, ensuring that data packets arriving at the destination are not misaligned.

Abstract: In a CDMA communications network a mobile station includes wanted signal processing circuitry (12) for processing an input signal (PRX), representing a CDMA transmission signal received at the mobile station from a base station of the network, to derive therefrom a wanted signal embodying a preselected spreading code. The mobile station also includes code information receiving circuitry (52) which receives from the base station code information (CIi1–CIim) identifying a further spreading code assigned by the network to an interfering signal of another network user. Interfering signal processing circuitry (14) employs the further spreading code identified by the received code information to reduce the interference effect of that interfering signal on the derived wanted signal.

Abstract: A technique for distributing receiver membership reports containing receiver information for a plurality of multicast source systems in a multicast source notification of interest protocol is disclosed. In one embodiment, the technique is realized by collecting receiver information for a plurality of multicast source systems; aggregating receiver information for each multicast source system into a respective record; indexing each respective record using an IP address of each multicast source system; aggregating the plurality of respective records into a single message; and multicasting the single message to a group address.

Abstract: A system and various methods and apparatus for efficient communications of data across various protocol layers are disclosed. A control system (210, 401) segments each message of a plurality of messages into a plurality of segments. A segment identification (805) is incorporated in each segment (804) identifying each segment as one of a start segment, a middle segment and an end segment of each message. Moreover, a sequence number (806) is incorporated in each segment of the plurality of messages in a stream of messages (801). The stream of messages (801) may include control messages (802) and short message service messages (803). The plurality of segments is transmitted by a transmitter (300) in an order of the sequence number (806) from a source to a destination.

Abstract: The present invention provides efficient and effective quality of service for information that is time sensitive (e.g., real time data). An intermediate network communication system and method (e.g., a router) of the present invention performs cut through switching to reduce latency problems for time sensitive information. In one embodiment of the present invention, communication packet header information is encoded with a time sensitive identifier that identifies the information as time sensitive. In one exemplary transfer control protocol/internet protocol TCP/IP implementation of the present invention, time sensitive indication is provided in the link layer information. In one embodiment of the present invention, time sensitive information is dropped if the intermediate network device can not communicate the information within specified timing constraints.

Abstract: A method and system for designing a bi-connected ring-based network is provided, which designs from scratch or converts an existing network to a dual-homed ring-based network. The network covers the locations capable of being bi-connected with one or more cycles/rings. The traffic demand is then routed via the cycles, in such a way so as to minimize the amount of network traffic management equipment required.

Abstract: A system for testing a software client or hardware module in a voice-over-IP (VoIP) network path includes a VoIP client, a test tool, and an analyzer. The VoIP client, connected to the VoIP network, makes a series of calls to a destination. The calls activate the software client or hardware module under test. The test tool, which has access to the network, plays a series of audio files over the VoIP during the calls. The test tool also polls the software client or hardware module over the network for status information after the calls are completed. While the audio files are being played, the analyzer records the audio files at the destination for measurement the quality of the calls. Accordingly, the quality of voice connection on the VoIP network can be measured, and specific components on the network can be tested.

Abstract: In a digital broadband broadcasting system, in which information is transmitted and received periodically in bursts to reduce receiver power consumption, time-slice information is provided from the transmitter to the receiver. The time-slice information can include information from which the receiver can determine when a subsequent transmission burst will be transmitted. The time-slice information can include a burst duration, an amount of time between original bursts, the time between an original burst and a copy of the burst, and numbering of original bursts. This type of time-slice information can be placed into packet headers, such as one or more bytes reserved, but not used, for media access control addressing.

Abstract: A software suite is disclosed for routing communication events over a data-packet-network using an IP session initiation and management protocol. The software suite comprises, a server application running on the network for computing and serving routing determinations per request, a session management application running on the network for initiating and managing routed and established session events, a parsing application running on the network for parsing request data received under session initiation protocol and a conversion application running on the network for converting data received under session initiation protocol into a routing request. All received communication requests for routing are in the form of the session initiation protocol wherein they are parsed and converted into routing requests processed by the server application and routed to determined destinations and wherein events are established as session events conducted under the session initiation and management protocol.

Abstract: An architecture for stacking DSLAMs employs a master DSLAM having a control circuit and an uplink communication circuit to a central office and two LVDS circuits for communication with two DSLAM boxes in adjacent circuit interconnection to the master DSLAM. Multiple slave DSLAMs each having a programmable control circuit and two LVDS circuits for communication with two DSLAM boxes immediately adjacent on either side in the circuit are connected in a ring or split stack arrangement. A control circuit in the master selectively programs the control circuits in each slave DSLAM to control the direction of communication in the LVDS circuits as round robin in a first selected mode and a split in a second selected mode to accommodate the desired structure.

Abstract: A method and system of transmitting packets of information over multiple channels such that the packets are sent simultaneously and serially across and down the channels.

Abstract: A method determines power of a modulated signal that is applied to a wavelength meter by summing bin values within a designated bin range of a frequency transformed interferogram representing the modulated signal and provided by the wavelength meter. In a first embodiment of the method, the bin range within which the bin values are summed is designated by mapping a series of signal characteristics indicative of the types of the modulated signals applied to the wavelength meter, to a series of bin spans within the frequency transformed interferograms that represent the modulated signals. The method then enables a selection of a signal characteristic from the series of signal characteristics to identify the modulated signal that is applied to the wavelength meter.

Abstract: A transmitting device and a receiving device are coupled via a high-speed serial interface within a computer system. The transmitting device transmits a packet header for a message request transaction that include a message group sub-field that indicates one of a plurality of message groups. The packet header also includes a format field that indicates whether the message request packet includes data. The packet header further includes a message code field to indicate a specific message type.

Abstract: Methods, systems and computer program products are discussed for processing a packet. Internet Protocol (IP) addresses located in a payload of the packet are translated if a source address and/or a destination address located in a packet header has been previously translated.

Abstract: A network switch having a hybrid switch architecture, which is scalable to increase connectivity, buffering, and bandwidth by using multiple shared-memory switch fabrics and multiple crossbar switch fabrics. Each of the crossbar switch fabrics is coupled to each of the shared-memory switch fabrics. The shared-memory switch fabrics are configured to store and retrieve packets. The crossbar switch fabrics are configured to distribute and re-collect packets to and from each of the shared-memory switch fabrics. The network switch having a hybrid switch architecture distributes packets from a crossbar switch fabric to the multiple shared-memory switch fabrics to share the distributed packets among the multiple shared-memory switch fabrics.

Abstract: A communication system for mobile platforms includes mobile platforms with transceivers identified by Internet Protocol (IP) addresses. A satellite relays a forward link from a ground station to the mobile platforms. The forward link contains IP packet data that is modulated by variable length orthogonal (VLO) spreading codes and that has different information data rates. The VLO spreading code for each IP packet is selected to optimize a desired link margin of the IP packet that is received by the addressed transceiver. The IP packets can also be modulated using a pseudonoise (PN) spreading code. Forward error correction (FEC) may also be applied. The transceivers include a feedback circuit that generates an Eb/No estimate.

Abstract: A wireless terminal device includes a wireless interface part having an interface with a wireless transmission path at a physical layer, a link forming part accessing the wireless transmission path via the wireless interface unit and forming a particular link on the wireless transmission path, and a transmission/reception part transmitting and/or receiving transmission information via the particular link formed by the link forming part. The wireless transmission path is formed as a physical channel to which a CSMA system is applied. The CSMA system secures a given transmission quality with respect to a total of the number of links concurrently formable and the amount of the transmission information. The link forming part forms the particular link on the wireless transmission path when initiated.

Abstract: A signal processor is adapted for aligning two or more hyper-concatenated data streams, each data stream being conveyed within a respective parallel channel and having substantially equivalent bit and frame rates. The signal processor comprises a respective channel processor for each channel for processing a respective data stream. Each channel processor includes a framer, a memory, an interface, and an output timer. The framer generates a local strobe signal indicative of a timing of incoming frames of the respective data stream. The memory buffers incoming bits of the respective data stream. The interface selectively sends the local strobe signal to, and receives a master strobe signal from, an adjacent channel processor. The output timer controls a timing of outgoing bits of the respective data stream based on a selected one of the local and master strobe signals.