Abstract: A system and method for establishing a communication path for a call between a video telephone/teleconference call and a packet network telephone terminal through a packet network. The call is routed through a multimedia gateway which performs a conversion process between a video telephone/teleconference domain and a packet network telephone domain.

Abstract: A system for digitizing voiceband signals at the remote terminal (20) of a Digital Subscriber Line (DSL) connection and embedding the digitized voiceband component into an active DSL data stream using a DSL modem (24). Voiceband transmissions between the remote terminal (20) and the central office call switching equipment (1) occur in the analog domain when the DSL modem (28) is OFF and in the digital domain when the DSL modem (28) is ON with the digital voiceband signals transmitted over a DSL link. Preferably, the remote terminal (20) can drive a real analog telephone (30) by providing battery feed, ring-trip detection, off-hook detection and ringing generation (60) In-house 4-wire lines pairs (21, 23) are configured between the modem, telephones and computer or home network to permit all digital transmission from the subscriber to the central office.

Abstract: A method is described that is used for common transmission of digital- and analog-modulated radio and/or television signals, in particular over a broad band cable system (30). The method includes transmitting at least one digital radio and/or television signal along with an analog television signal in one and the same channel, in which the frequency spectrum of the at least one digital radio and/or television signal is limited to a frequency range that is less than the width of the at least one channel. To lessen the influence of the at least one digital radio and/or television signal on the analog television signal, the at least one digital radio and/or television signal must fall below a predetermined signal level, and the peak level of the analog television signal must exceed a predetermined value, which is markedly higher than the predetermined signal level of the at least one digital radio and/or television signal.

Abstract: A path merging type communication apparatus comprises a leaf interface unit, a root interface unit, a controlling unit, and a converting unit. The leaf interface unit and the root interface unit interface with air ATM communication unit or an ATM terminal unit. The controlling unit controls each structural unit of the apparatus. The converting unit merges input ATM cells and switches them. The converting unit adds input path identification information (such as a VPI and a VCI contained in an input ATM cell) and an intra-apparatus header (that contains a leaf IF unit number of the leaf interface unit to which the cell has been input) to the ATM cell and generates an output ATM cell.

Abstract: A secure communication hub (10) relays local communications between low probability of intercept (LPI) user radio equipment (68) and provides a secure interface with a command center (58) through a non-geostationary commercial satellite communication system. The secure communication hub (10) includes different radio interface units (12) for communicating different data formats with the (LPI) user radio equipment (68). Encryption and decryption circuitry (18) provides for different security levels and different keys for the (LPI) user radio equipment. Links with the satellite system are secured using encryption.

Abstract: A method for automatically aggregating objects and determining a hierarchical organization of these objects and aggregates by exploiting known or computed priorities and correlations.

Abstract: A data routing system for dynamically optimizing bandwidth which includes a network control unit, a route comparator, a reroute control unit and a packet reordering unit. The network control unit reserves the initial route from the source node to the end node. The route comparator determines whether an alternate route is more optimal than the initial route and the reroute control unit establishes the alternate route and reroutes the data over the alternate route. The packet reordering unit maintains the sequence of the data packets on the alternate route.

Abstract: A two-way wireless communications system for permitting the control, monitoring and collection of data from electrical apparatus includes a host computer, control and monitoring units remotely located from the host computer, and subscriber software for establishing communication protocol with each unit. The host computer includes a customer interface gateway which handles communications from the subscriber software to the host system, a wireless service gateway which handles all communications with the remotely located units, and a product data processor for processing data obtained from either a customer via the subscriber software or a particular remote unit. The subscriber software permits customers to have desktop control of their electrical apparatus associated with a remote unit. Each remote unit contains a motherhood, power supply, and modem. Each unit is capable of real-time monitoring and control of the electrical apparatus associated with the unit.

Abstract: A method and apparatus for segmentation and assembly of data frames for retransmission in a telecommunications system. Zero padding of radio link protocol (RLP) data frames carrying retransmissions is minimized. RLP data frames carrying retransmitted data of an RLP data frame may also carry at least one newly transmitted RLP data frame or at least one other complete or partial retransmitted RLP data frame. The RLP data frames are passed to a lower level protocol and transmitted in at least one transmission frame.

Abstract: A method for providing redundancy to an Asynchronous Transfer Mode (ATM) emulated local-area network (LAN) is disclosed. The ATM emulated LAN is served by a primary LAN Emulation Server, a Broadcast and Unknown Server (LES/BUS), and a LAN Emulation Configuration Server (LECS). A backup LES/BUS is coupled to the ATM emulated LAN. A logical redundancy virtual channel connection (VCC) is then established between the primary LES/BUS and the backup LES/BUS. When the redundancy VCC is present between the primary LES/BUS and the backup LES/BUS, the backup LES/BUS is placed in a dormant mode. However, when the redundancy VCC is absence between the primary LES/BUS and the backup LES/BUS, the backup LES/BUS is activated to serve any request generated by the ATM emulated LAN.

Abstract: A method for providing a security mechanism to an Asynchronous Transfer Mode (ATM) emulated local-area network (LAN) is disclosed. The ATM emulated LAN is served by a LAN Emulation Server (LES), a Broadcast and Unknown Server (BUS), and a LAN Emulation Configuration Server (LECS). After receiving a LE_JOIN_REQUEST from an LE client within the emulated LAN, the LES forms a LE_CONFIGURE_REQUEST on behalf of the LE client, by utilizing the information from the LE_JOIN_REQUEST. The LES then sends the LE_CONFIGURE_REQUEST to the LECS. In turn, the LECS sends back a LE_CONFIGURE_RESPONSE to the LES. After receiving the LE_CONFIGURE_RESPONSE from the LECS, a determination is made as to whether or not a status field within the LE_CONFIGURE_RESPONSE indicates a success and a target ATM address field within the LE_CONFIGURE_RESPONSE contains an ATM address of the LES.

Abstract: Methods, apparatus and computer products are provided for allocating network resources for data transport between a source network node and a destination network node by selecting a transport mechanism from a plurality of transport mechanisms based upon a prediction of the cost of the utilization of the transport mechanism so as to provide the transport mechanism having the lowest predicted cost.

Abstract: A base station timing analyzer measures the timing performance of a base station from within the base station coverage area without interruption or degradation of the system performance. The timing analyzer has a dummy signal generation mechanism that produces a dummy signal output based on a universal time input. An antenna couples a signal from an operating base station from a wireless link. A summer sums together the dummy signal and signal from the wireless link. A demodulation element receives the summed signal and searches for and demodulates each of the signals. A comparison unit compares the output of the demodulation element to determine the timing performance of the base station to provide an indication of the absolute time offset of the base station signal.

Abstract: Provided are a method and system for use within at least one network wherein broadcast occurs. The method and system achieve their objects as follows. In response to reception of a data frame with at least one destination indicator ordinarily requiring broadcast to a first defined group of stations, at least one attribute of the received data frame is examined. In response to the step of examining, the received data frame is transmitted to a defined second group of stations, smaller in number than the first group of stations.

Abstract: A system for allocating resources at network elements along a path through a communications network. Resources are allocated at a network element along the path in response to a connection request message. The delay budget is the minimum of a calculated cell transfer delay and a calculated cell delay variation. The calculated cell transfer delay is determined by finding a difference between a target end to end cell delay and an accumulated cell delay, and then dividing that difference by a number of network elements remaining in the path between the network element and the end of the path. To determine the calculated cell delay variation, the network element first finds a difference between the Max CDV QoS parameter and the sum of the accumulated cell delay variation and the switching delay for the network element. The calculated cell delay variation is then equal to that difference divided by the number of network elements remaining in the path between the network element and the end of the path.

Abstract: A data communications system includes a server router (102), such as an access controller gateway, operably coupled to at least one client router (104), such as a base radio controller, by an asynchronous link, such as a LAN (106). The client router forwards data received from the server router and stored in the client router's outbound queue (110) synchronously to a device, such as a mobile station (202). The client router's outbound queue is maintained between a lower queue limit and an upper queue limit so as to both reduce the occurrence of data starvation and reduce the amount of data lost should the mobile station hand off to a new serving site. The server router calculates an optimum average send rate and transmits data in bursts at regular intervals, and adjusts the average send rate in response to changes in the outbound rate of the client router.

Abstract: A multimedia terminal having a host processor, an audio and video encoder, a system time clock, and a multiplexer is provided. The encoders input elementary stream of data into the multiplexer. The multiplexer is comprised of a mux processor, a FIFO which buffers the elementary stream of data, and a mux logic circuit which preprocesses the elementary stream of data in accordance with an encoder/decoder protocol.

Abstract: A packet scheduling system for use in a switching node of a high speed packet switching network. Incoming packets are enqueued in connection queues. Each connection is classified as red (exceeding traffic profile) or green (within traffic profile). QOS priority is also identified for each connection. Packets are dequeued for transmission as a function of priority class and connection class. Higher priority class connections have priority over lower priority class connections. Within a given priority class of connections, green connections have priority over red connections. Round robin scheduling is used for packets from connections in the same priority and connection class. In addition, a dynamic priority coupling mechanism is provided to prevent red higher priority traffic from blocking green lower priority traffic.

Abstract: A method and apparatus for controlling a parameter associated with a first signal transmitted from a first station to a second station in a communication system monitors a second signal transmitted from the second station to the first station to determine a propagation state associated with the transmitted signals. A loop gain is adjusted based on the propagation state. The loop gain is used to adjust the size of commands used to adjust (i.e., increase or decrease) the parameter being controlled. If the propagation state is a quiescent state, the loop gain is set to one. If the propagation state is an active state, the loop gain is set to some value greater than one thereby increasing the size of the commands used to control the parameter. In a preferred embodiment of the present invention, the controlled parameter is a transmit power level of the first signal.

Abstract: A radio communication network comprising a plurality of communication terminals and a plurality of repeaters intermediate the communication terminals, with wayside communication paths being established between pairs of the repeaters via two radio channels carrying the same data. Protection switching of a wayside path is determined, in a preferred embodiment, by using one common wayside path to calculate the FEC (Forward Error Correction) and PEC (Parity Error Count). Switching to the better of said two channels is effected if FEC or PEC exceed predetermined thresholds. The common wayside path is defined as follows: (a) &Sgr; wayside A path+&Sgr; wayside B path −&Sgr; (wayside A ||wayside B), if waysides A and B are overlapped (||indicates overlapped portions of the two parameters.) (b) wayside A path OR wayside B path, if waysides A and B are not overlapped.