Abstract: A system for multicasting. The system includes a network comprising nodes and links connecting the nodes. The system includes a mechanism for forming a multicast connection which does not have overlapping branches. A node for an ATM network. The node includes a forming mechanism for forming multicast connections in the network which do not have overlapping branches as parties are added or deleted from the connections. The node includes a port mechanism which connects to the network through which the connections are sent to the network. The forming mechanism is connected to the port mechanism. A method for forming multicast connections. The method includes the steps of forming a first connection between a first node and a second node. Then there is the step of forming a second multicast connection between the first node and a third node by extending the first connection.

Abstract: An Ethernet ADSL adapter controls data communication between an Ethernet port and an ADSL modem connected to an ADSL channel. The adapter includes a first buffer for storing data packets received at the Ethernet port, a second buffer for storing data packets received from the ADSL modem and a controller. When the first buffer contains a first predetermined number of data packets and data packets are not available for transmission to the Ethernet port, a jamming signal is transmitted from the Ethernet port. The jamming signal inhibits transmission of additional data packets to the Ethernet port by other Ethernet nodes until space is available in the first buffer. When the second buffer contains a second predetermined number of data packets, a pause signal is transmitted to the ADSL modem. The pause signal inhibits further transmission of data packets to the ADSL modem on the ADSL channel until space is available in the second+ buffer.

Abstract: A network-provisioning data generating method, by which manual data registration can be prevented so that correct network provisioning data can be collected and registered in real time, and a transmission device, which is constituted according to the generated network structure, are provided.

Abstract: A diversity receiving apparatus for use in an OFDM transmission radio communication/broadcasting system where OFDM signals are received by a plurality of antennas and input into a plurality of receivers. The OFDM received signals are further transformed into frequency spectra. Channel frequency responses are calculated by using OFDM received signal frequency spectra and a reference frequency spectrum generated in a reference spectrum generator. OFDM received signal frequency spectra distortions are compensated by using corresponding channel frequency responses. The transformed OFDM received signal frequency spectra are input into a selector unit as first input signals, while the distortion-compensated OFDM received signal frequency spectra are input into the selector unit as second input signals. The selector unit then selects a second input signal corresponding to a first input signal having maximum amplitude or maximum power.

Abstract: An Internet network based telephone call forwarding system comprising a home unit to which a user's telephone calls are directed and a remote unit to which a user's telephone calls are forwarded, wherein the home unit has an incoming line connectable to a telephone network and an outgoing line connectable to an Internet network and the remote unit has a line connectable to the Internet network, wherein the home unit is operable to forward calls directed to the home unit on the incoming line to the remote unit on the outgoing line via the Internet network.

Abstract: Input interfaces convert a predetermined data frame structure, such as a Sonet STS-1, into an internal format comprising a predetermined number of rows and columns, the rows being a multiple of a number evenly divisible into the bytes contained in the internal frame format. A time-space switch switches the frame format while storing a row of bytes in a data memory. Output interfaces convert the switched data to the same type of data frame format received at the input.

Abstract: A frame relay network has a network management system in combination with frame relay nodes. The network management system provides frame relay oversubscription trunk and connection parameter signals to the frame relay nodes. The network management system uses a graphical user software interface program for receiving frame relay oversubscription trunk and connection parameters from a network supervisor that are formatted into the frame relay oversubscription trunk and connection parameter signals. The frame relay nodes respond to the frame relay oversubscription trunk and connection parameter signals, and at least one frame relay node provides a frame relay oversubscription connection control signal containing connect level parameters to another frame relay node when relaying communication signals from one frame relay node to another frame relay node. In operation, the trunk line has multiple virtual connections communicating the frame relay oversubscribed data between the frame relay nodes.

Abstract: A method of establishing Quality-of-Service (QoS) communications within a network proposes the encapsulation of a control message that facilitates QoS for an associated data flow, according to a protocol not implementing resource reservation, such as the User Datagram Protocol (UDP). The encapsulated control message is then propagated through the network on a routed path, while the associated data flow is propagated over a short-cut path through the network.

Abstract: A clock selection controller is shown which allows a user to assign a priority scheme to recovered clock signals obtained from communication facilities. The clock selection controller also receives a plurality of alarm signals corresponding to the communications facilities for each of the recovered clock signals. The clock selection controller then automatically selects, for output as a reference clock signal, the highest priority clock input available for which the corresponding alarm signals are inactive. In the absence of an available clock input in the priority scheme, the processor selects a free running clock input.

Abstract: A protocol is provided for backing up ATM network devices should they fail. The protocol is implemented in a system running ATMARP and supporting IP over ATM. In the protocol, multiple ATM network devices are combined in a “standby group” and share a common IP address. When an active member of the standby group fails, one of the other members of the standby group takes over ATM responsibility for the functions of the failed device. An ATMARP Server determines which member of a standby group should handle IP packets destined for that group.

Abstract: A digital filter includes a plurality of filter cells, each of which includes circuitry to determine a coefficient for the filter cell, to adjust the coefficient in accordance with a gain that is used by each of the plurality of filter cells, and to multiply input data by the adjusted coefficient in order to generate a filter cell output. An adder circuit generates a filter output by adding filter cell outputs from each of the plurality of filter cells, and an inverse gain circuit adjusts the filter output in accordance with an inverse of the gain used to adjust the coefficients of the plurality of filter cells.

Abstract: A mapping memory, for use with a transmitter, for mapping a first signal segment and a second signal segment of a packet so that each signal segment has the same average power level. Each signal segment is characterized by a different modulation format. The first signal segment might use BPSK, while the second signal segment might use QAM, having multiple amplitude levels.

Abstract: The system establishes a transmission sequence for effecting communications between plural terminals in a wireless network. This transmission sequence is defined by a control data frame comprised of plural slots, each of which can be allocated for communication between one pair of the plural terminals. In operation, the system begins by generating a transmit/receive matrix for the plural terminals in the wireless network. This transmit/receive matrix includes plural rows and plural columns, where each of the plural rows corresponds to a terminal and each of the plural columns corresponding to a same or different terminal. At each row/column nexus, the transmit/receive matrix includes an entry which indicates whether communications are to be effected between a pair of terminals that corresponds thereto. Slots in the control data frame are then allocated to pairs of the plural terminals based on these entries in the transmit/receive matrix.

Abstract: A coding apparatus of the present invention comprises coding circuit 1 for audio signals, coding circuit 2 for video signals, interface circuit 3 on input of scene data, coding circuit 4 for scene data, composition circuit 5, multiplexing circuit 6, display circuit 7 and clock generating circuit 8. Each of coding circuits 1, 2 and 4 outputs time information representing a decoding timing, and composition circuit 5 outputs time information representing a composition timing. Multiplexing circuit 6 multiplexes time information together with the compressed data given from each of coding circuits 1, 2 and 4, thereby generating a bit stream.

Abstract: A packet switch for switching variable length packets, wherein each of output port interfaces includes a buffer memory for storing transmission packets, a transmission priority controller for classifying, based on a predetermined algorithm, transmission packets passed from a packet switching unit into a plurality of queue groups to which individual bandwidths are assigned respectively, and queuing said transmission packets in said buffer memory so as to form a plurality of queues according to transmission priority in each of said queue groups, and a packet read-out controller for reading out said transmission packets from each of said queue groups in the buffer memory according to the order of transmission priority of the packets while guaranteeing the bandwidth assigned to the queue group.

Abstract: A telecommunications network is provided. The network uses a ring of ring switches to provide a transport mechanism for data packets that is transparent to the data and protocols contained in the data packets. This transport mechanism is simple and low cost to implement. Such networks can carry, for example, control data between a primary site and secondary sites of a cable network to set up and deliver pay per view, video on demand or near video on demand programming. The network can also be used, in other embodiments, to provide remote access to utility meters, to centralize network management of the cable network, and other appropriate monitoring and control functions.

Abstract: In an ATM (Asynchronous Transfer Mode) switch circuit, use efficiencies of address storage memories are increased even when a total number of output ports is increased. The ATM switch circuit is arranged by an ATM cell buffer memory, an ATM cell managing unit, an address storage memory, an empty address managing unit, and also a buffer address managing unit. In this ATM switch circuit, the address storage memory may be commonly used with respect to the output ports. As a result, since the length of the address chain corresponding to the output ports may be adjusted in accordance with the use frequencies of the output ports, the address storage memory can be effectively used, depending upon a plurality of output ports.

Abstract: An echo cancellation system measures an average delivery rate of a reference data signal and an average capture rate of an input data signal. From the measured data rates, the system converts the reference data signal to a domain of the input data signal. An echo canceler cancels an echo that may be present in the input data signal based upon the converted reference data signal.

Abstract: The cable interface unit in accordance with the invention allows use of the same wire in one cable both for base-band transmission of data between telecommunication equipment in full duplex form and also for transmission of an operating voltage (V) from one device to another. In the transmission unit, data is transmitted through a hybrid connection (41) to a cable (23). After the hybrid connection, the operating voltage (V) is also brought to the cable with the aid of a diplexer (44). The hybrid connection separates the arriving data and conducts it to the receiver, where the data is shaped in an analog manner by correcting level distortions and thereupon in the digital signal processing a DECISION is made on what the received symbol is.

Abstract: A receiving method for absorbing cell-fluctuation with a minimum data delay in low-speed transmission in an ATM switching network. In a cell fluctuation absorption receiving method of a CLAD device equipped in an ATM switching network, the CLAD device for assembling or disassembling cells from or to a bit string having a fixed communication speed of data communication from the connected communication device includes a CLAD unit having a receiving buffer corresponding to the communication speed of each of the addresses, and before storing the first received cell data, storing dummy data in a receiving buffer, the dummy data corresponding to the fluctuation guarantee time.