Abstract: A first group of asynchronous clock converters effect the conversion between a DNE clock and an RDT clock to which DS-0 data and signalling data are synchronized, for the data items which are transferred between a cross-connector and a DNE. A second group of asynchronous clock converters effect the conversion between a CPE clock and the RDT clock to which DS-0 data and signalling data are synchronized, for the data items which are transferred between the cross-connector and a CPE. As a result, cross-connect processes based on the single RDT clock are realized, and loop timings are guaranteed for the DNE and the CPE.

Abstract: The router disclosed herein employs a plurality of forwarding processors and a matrix switch for selectively connecting input ports, output ports and the forwarding processors. Each of the input ports includes means for selecting a respective forwarding processor for each incoming data packet in accordance with data in the respective packet header and for transmitting the packet header to the selected forwarding processor. The selected forwarding processor operates to transmit to the originating input port the identity of an output port appropriate for the packet's next hop.

Abstract: An apparatus for converting frame-type transmissions to packet-type transmissions. In one embodiment, the apparatus comprises a medium access controller (MAC) coupled to a packet-based network and multiple packet assembler/disassemblers (PADs). The PADs include a data link layer (DLL) PAD coupled to the MAC, a high level data link control (HDLC) PAD coupled to the DLL PAD, a network layer (NL) PAD coupled to the DLL PAD, and a NL/frame alignment sequence-bit-rate allocation signal (NL/FAS-BAS) PAD coupled to the DLL PAD. Multiple detection units are coupled to respective PADs, wherein each of the plurality of detection units detects a frame-type transmission.

Abstract: In CDMA mobile communication of the packet switching mode which is one-way, the packet is transmitted to divide to a frame unit. In this time, the first, the second and the third transmission timing which are obtained to divide to three pieces the predetermined frame are set up for increasing the transmission efficiency by realizing the retransmission of the frame unit, as the transmission timing of a backward control signal in a backward channel,. Base station 100 transmits a forward signal (a forward control signal and an user data signal) by using code A (a forward channel) at any frame. When the forward signal is received at this frame by mobile station 70, mobile station 70 transmits a receiving acknowledgment signal (a backward control signal) of the forward signal by using code A' at the first transmission timing of the next frame.

Abstract: A digital video signal is transmitted via a communication system which can transmit digital data through an asynchronous communication line (ATM communication line) or the like and, at the same time, voice information for the working communication and information such as computer information are transmitted by using the communication system. The user of a first data transmitting apparatus sets up the character data etc. for communication on the terminal. The set character data is multiplexed in the predetermined transmission packet together with the audio and video data output from the VTR device and transmitted via an ATM communication line 2 to a second data transmitting apparatus. In the second data transmitting apparatus, the character data is demultiplexed from the transmission packet and displayed on for example the display device of the personal computer. In place of the character information, also voice information can be transmitted by a telephone set.

Abstract: The present invention provides a CDMA RAKE receiver that computes a data detection using Fast Fourier Transform (FFT) matched filters. Signals received are processed in frequency domain by the RAKE receiver. The RAKE receiver includes a pilot signal spreading code matched filter, a data signal spreading code matched filter and a channel matched filter. The pilot signal spreading code matched filter removes a spreading code of the pilot signal. The data signal spreading code matched filter removes a multiple access spreading code of the data signal. A channel matched filter estimates the channel frequency response and combine the received data signal from different paths before a decision is made. For increasing the CDMA system capacity, the RAKE receiver uses a interference cancellation method. A downlink receiver at a mobile station estimates the interference of a pilot signal and subtracts the pilot interference from the received signal before data detection.

Abstract: This invention teaches methods, and circuits that operate in accordance with the methods, for improving the management and control of pilot channel sets for a CDMA mobile station. In one aspect a Priority Neighbor Search technique is provided, wherein a list of Priority Neighbor pilot channels is maintained and searched with a higher priority than the Neighbor Set pilot channels. In a further aspect this invention provides a Dropped Pilot Channel Search technique wherein a set is made of the last pilot channel or pilot channels dropped from the Active Set, wherein the dropped pilot channels are searched for some period of time with a higher priority than the Neighbor Set pilot channels. This invention also provides a High Priority Search Set feature which includes members of the Active Set, the Candidate Set, the Dropped Pilot Set, and the Priority Neighbor Set.

Abstract: In a telecommunications network, broken connections can be detected and located through a next hop loopback technique. The next hop loopback technique involves the generation, transmission, and analysis of specialized data packets which attempt to traverse a telecommunications connection, node by node. The failure of a data packet to properly traverse a link can then be used to determine whether a connection is broken, to notify the network management system as to the location of the broken connection, and whether appropriate action is warranted so that the network operator can re-route data around that portion of the network. In addition, the next hop loopback technique can be triggered on an "as needed" basis by the end user, rather than on a periodic basis, thereby conserving network time and resources.

Abstract: A method is disclosed for operating a mobile station (10). The method includes a first step of receiving a forward channel from a base station (30), the forward channel being transmitted to contain repeating frames each comprising N time slots, individual ones of the time slots including a synchronization word. A second step of the method correlates an i.sup.th one of the N time slots using a first correlation sequence (SYNC 1) and a second correlation sequence (SYNC 4) to obtain a first correlation result and a second correlation result, respectively. A third step of the method declares the forward channel to be one of a half-rate channel or a full-rate channel based on the first and second correlation results. In an exemplary embodiment N is equal to six, and i is equal to four. In the exemplary embodiment the first N/2 of the time slots are transmitted to have a same sequence of N/2 synchronization words whether the channel is a half-rate channel or a full-rate channel.

Abstract: The routing of calls in a telecommunications switching system (12.sub.1, 12.sub.2) comprised of one or more fabrics (22.sub.1, 22.sub.2, 22.sub.3) controlled by corresponding fabric controllers (26.sub.1,26.sub.2 and 26.sub.3, respectively) is carried out by a routing processor (28) independent of the fabrics. The routing processor actually selects the route for each call by specifying a channel to a neighboring switching system to carry the call. Further, the routing processor has the capability to respond to queries from other switching systems regarding trunk group status and traffic load to enable the processor to assist the routing processor of the other switching system to make routing decisions. By implementing fabric independent routing, routing processing is re-used for new fabric capacity, and is readily extended to accommodate new service types, such as bursty data services.

Abstract: Management data is supplied to a management agent by a network switch by generating management packets having at least a portion of a received data packet, and management information specifying receive status and network switch response characteristics to the corresponding received data packet. The network switch includes a plurality of network ports, including network traffic ports and one management port for synthesizing the management frame. A network traffic port receiving a data packet generates receive status data specifying the reception status of the received data packet, including the presence of cyclic redundancy check (CRC) errors, frame alignment errors, and receive buffer overflow conditions. The received data packet and received status data are stored in a buffer memory, while switching logic generates port vectors specifying destination output ports and switching logic data specifying the switching logic response to the received data packet.

Abstract: In a fiber channel network, a method and system for discovering the location of a storage device that does not support FARP using a FARP broadcast using a storage router as a proxy. The storage device can be connected to the storage router via an arbitrated loop or a local SCSI interface. The storage router can perform a discovery to determine the node names of each storage device connected to it and save the discovered storage device node names to a look-up table. The storage router then sends a FARP request to each storage device on the look-up table. For each storage device that responds, flagging the corresponding node name for that storage device in the look-up table as FARP compatible, and for each storage device that does not respond, flagging the corresponding node name as not being FARP compatible.

Abstract: An electromagnetic downlink and pickup apparatus for transmitting and receiving electromagnetic signals is disclosed. The electromagnetic downlink and pickup apparatus includes a subsea conductor (47) disposed beneath the sea floor (16) and a surface installation (58) for generating and interpreting signals. The subsea conductor (47) and the surface installation (58) are electrically connecting by first and second conduits (30, 51) that form a pair terminals on the subsea conductor (47) between which a voltage potential may be established, thereby providing a path for current flow therebetween.

Abstract: An intelligent network includes service switching points, where the call switching is made and where data relating to calls and signals indicating various events relating to the calls are generated Service control points are connected to the service switching points. A service control point includes a service control function for processing events relating to calls. The service function includes predefined building blocks or control types, which are executed for specific events relating to a call. In order to provide an interface to the exterior allowing some customer design or customer programming, in particular to servers including some service finction which is supplied by the customer running the server, the servers are connected to the network only at a single service control point. The service control function in this service control point includes therefor a remote procedure building block, which transfers, when it is executed for an event relating to call, data relating to the call to a data buffer.

Abstract: A method of frame synchronization for OFDM point-to-multipoint channels is provided according to a first aspect of the invention, wherein sequences of reference frames are inserted at prescribed intervals between sequences of information frames. Each frame comprises a cyclic prefix, composed of two identical segments of data, which is used for locating a frame synchronization starting point by applying a subtraction function on the two segments of data for locating the starting point at the location of the minimum of the function. A method of channel equalization for OFDM channels is also provided according to a second aspect of the invention, wherein the reference frames and data known to a receiver are used for creating an equalization vector for correcting broadcast errors of the information frames received at the receiver side.

Abstract: A method and apparatus for distributing and consolidating data packets onto multiple network interfaces includes using frame-based inverse multiplexing to parse high-speed data into frames for placement onto lower-speed E1 or T1 connections between a base station controller and a base station, or between two base station controllers, in a cellular telephony network. The inverse multiplexing algorithm may be implemented with hardware such as, e.g., FIFOs and registers. The frames are transmitted across the E1 or T1 connections and then received, buffered, and multiplexed into a single high-speed data stream.

Abstract: A method and apparatus for supporting connections on multipoint-to-point topologies is disclosed. A cell scheduler schedules packets from incoming VCCs for transmission on the order that a complete frame is available. Cells are received from a plurality of virtual channel connections. The cells for each of the virtual channel connections are stored in a buffer until a complete packet has been received. When a buffer accumulates a complete packet of cells for one of the virtual channel connections, the cells are scheduled for transmission. A complete packet is determined by looking at a packet type identification field. Cells forming a first packet for a first virtual channel connection are transmitted continuously until all the cells have been transmitted. A next available complete packet of cells is transmitted after the first packet of cells has been transmitted. A determination is made whether a cell is a data cell, an OAM cell, a Resource Management cell or a reserved cell.

Abstract: A device interconnects across links, a plurality of terminals having respective modes of operation. The device includes a plurality of ports for connection to respective links, and logic coupled to the plurality of ports to exercise an auto-negotiation protocol with terminals coupled to the respective links to resolve modes of operation. The logic includes a shared unit for executing the auto-negotiation protocol, and an arbiter unit for arbitrating among the plurality of ports for use of the shared unit. The arbiter connects ports in the plurality of ports to the shared unit in a round robin sequence. Memory stores a set of status signals for respective ports. The arbiter logic polls the memory to read the set of status signals in sequence, and in response enables use of the shared auto-negotiation unit by the ports. The modes of operation resolved by the shared auto-negotiation unit include LAN technology supported by terminals on the corresponding links, such as IEEE 802.3 Local Area Network technologies.

Abstract: The present invention relates to connectionless transmission in high speed packet switching networks, and in particular to a group addressing method and system for sending a datagram to one or a plurality of destination nodes and within these nodes for duplicating the datagram and to forward it to multiple end users. The claimed invention takes advantage of a specific data transfer mode called "Remote Access to Functional Addressing" allowing the sending of a datagram to a destination node and within said node, the duplication of said datagram for a transmission towards multiple destinations.

Abstract: A communication system, a mobile services switching center and a method is described, for allowing a multi-dialogue communication to take place between a first subscriber station (MS1, MS2, . . . MSn) and a second subscriber station (ISDN ST1) through a mobile services switching center (MSC/VLR) of a public land mobile network (PLMN). A mapping device (MP) of the mobile services switching center (MSC) maps several communication channels between the first subscriber station (MS1, MS2, . . . MSn) and the mobile services switching center (MSC/VLR) onto at least one second communication channel (CC2) between the PLMN and a fixed network (FN).