Abstract: An infra-red secure remote controller having a xenon gas discharge tube which is ignited and pulse modulated with a code impressed on the resultant xenon plasma arc. Each pulse modulated code represents a channel formed of a short pulse burst train of a plurality of high-energy optical pulses. The optical pulses are repeated about 10 to 15 times in a pulse burst train, so that the actual pulse burst train duration will comprise the pulses plus the dark interval time between pulses. Both the pulse length, the dark interval time, and the pulse burst train length are used by circuitry in a receiver for the controller to identify and distinguish an actual transmission from other interfering transmissions. The infra-red remote controller utilizes pulse burst length factors to enhance the reliability of the transmission and increase the possible number of separate codes available.

Abstract: Methods for performing origination and termination processes to control reserved semi-permanent virtual path connections in an asynchronous transfer mode virtual path switching system. A service can flexibly be provided based on semi-permanent virtual path connection information for a desired time in response to a reserved semi-permanent virtual path registration command received through an operator interface during the operation of the system. Also, the reserved semi-permanent virtual path connections can be controlled up to 256 per subscriber link of 155 Mbps class. A subscriber service using time is designated and resources in a network are occupied only for the designated time. Therefore, a plurality of subscribers are set at different service time zones in such a manner that the network resources can be utilized at the maximum at each service time zone.

Abstract: A packet-based transmission system is disclosed in which resource management packets containing cell rate information are processed at a single ABR server. The server receives forward resource management packets and routes them without modification to their destination. The server also receives reverse resource management packets which it processes by updating their corresponding cell rate information based, for example, on cell rate information received from the forward cells.

Abstract: A direct sequence spread spectrum architecture permits low power consumption during a synchronization phase of data reception by allowing the receiver to be turned off during most of the acquisition phase of reception, or by using a parallel correlator to keep acquisition time short. The architecture is particularly suitable for global positioning satellite (GPS) signal processing and permits multiple satellite codes and multiple Doppler bins to be searched either sequentially, without requiring the receiver to be turned on during the search process. The receiver output baseband data is sampled and stored over a time interval sufficient to achieve acquisition and synchronization for any one code division multiple access (CDMA) signal at any specific Doppler shift. This sample is digitally recorded and re-played from memory as many times as may be required to acquire and synchronize each desired CDMA signal. To keep processing energy consumption low, an analog (capacitor-based) cross-correlator is used.

Abstract: A method and apparatus for accurately determining the operating characteristics or impact of nonlinear effects on devices or communication systems transferring orthogonally coded spread-spectrum communication signals. A Walsh Power Ratio, is used to more accurately determine system response. This information can be used by power control loops in controlling or adjusting the operation of nonlinear elements or stages such as high power amplifiers in orthogonal CDMA communication systems to provide improved system response. The information can also be employed in assigning channels to systems users, and to proceed with physical changes to system hardware. The measurements used to formulate the WPR can be made to individual components or to entire systems by injecting communication signals in multiple channels containing data, and leaving at least one empty channel. The received power per channel on the output side of the system or device is then measured.

Abstract: In a CDMA cellular radio system a plurality frequencies of the system are divided into frequencies belonging to a first group and frequencies belonging to a second group, all of the frequencies of the first group are commonly assigned to all of the base stations BS1 to BSn and the frequencies of the second group are individually assigned to the base station groups BSa to BSc. The frequency in the first group is preferentially assigned to a mobile station MSj, and when the mobile station MSj moves between the cells of the different base station groups, soft handoff is effected by using the frequency in the first group. Further, the rates of use of channels of the respective assigned frequencies are monitored for the respective base stations BS1 to BSn, and when a frequency corresponding to the rate of use of the channel which has exceeded a threshold value is detected, the idle handoff control is effected with respect to the mobile station which uses the above frequency.

Abstract: An engineering order wire arrangement is provided for a synchronous telecommunications network comprising a plurality of nodes interconnected via transmission paths, each path accommodating a plurality of transmission channels. Engineering voice traffic is carried on a first overhead channel having a defined network route topology. A second overhead channel is used to define a model network having a a route topology identical to that of the first overhead channel. The model network is tested to determine its integrity, i.e. the absence of loops. If the model network is found to be defective, both networks are reconfigured.

Abstract: A communication system includes a number of communication devices coupled to a data network using communication servers. The communication system supports communication sessions between a variety of networks and devices using, at least in part, XDSL communication techniques. Specifically, information associated with a session passes between a device and an associated server using a modifiable number of XDSL modems and associated twisted pair lines.

Abstract: In a fault evaluating system for a transmission apparatus having four packages which are mutually duplexed in both transmission and reception directions and bridged to oppose each other, each package includes a fault detection unit, a fault information extraction unit, a fault information insertion unit, and a fault evaluating unit. The fault detection unit individually detects an abnormality in signals transmitted from duplexed opposing packages. The fault information extraction unit individually extracts fault information representing a fault package, which is contained in the signals transmitted from the duplexed opposing packages. The fault information insertion unit generates fault information representing the fault package in accordance with a detection output from the fault detection unit, inserts the generated fault information and the fault information extracted by the fault information extraction unit in a signal to be transmitted, and sends back the signal to the duplexed opposing packages.

Abstract: For enabling to obtain automatically a proper identifier of a remote terminal and to assign an identification number to the remote terminal in order to performing supple communication control of a data transmission system wherein upward communication is performed according to a TDMA system and downward communication is performed according to a TDM system making use of cells having fixed length; a local station of the system comprises: a command-cell generation timer (112) for generating a command-cell generation trigger periodically, a command-cell generating unit (113) for generating a command cell to be downward transmitted every time the command-cell generation trigger is supplied by writing an available identification number therein, a window generation timer (111) for enabling a window signal every time the command-cell generation trigger is supplied for inhibiting transmission of upward cells from the remote terminals whereto identification numbers are assigned, a control-data-cell generating/terminatin

Abstract: The present invention provides an FM multiplex information receiving apparatus capable of reducing a required time for indicating a received program to a necessary minimum time and capable of executing update process for a update program. An FM multiplex information receiving apparatus is configured so as to operate as follows. The apparatus stores a received program into the memory in case that a program number which is the same as the received program is present in memory and these update code differ. The apparatus deletes the program-related information at power off or on. The apparatus retains the non-program related information in the memory until a lapse of a certain time after power off.

Abstract: A digital data transfer system comprises a source module and a destination module interconnected by an information transfer medium. The source module initiates a transfer operation in which it transfers a data item and an associated address over an information transfer medium. The address having an aperture identification portion that identifies one of a plurality of apertures. The destination module receives the data item and the associated address from the information transfer medium during the transfer operation, the destination module using the one of the plurality of apertures identified by the aperture identification portion to generate an aperture value for association with the data item. The source module can also initiate a retrieval operation, during which it transfers an address over the information transfer medium to retrieve previously transferred information.

Abstract: A method and device for transmission of data units over a communication network, particularly over a network where data units are transmitted with constant bit rate. Bandwidth reservation is optimized in the communication network for more than one file transfer within a greater time period between two dedicated end systems, running automatically without needing user interaction. The bandwidth is controlled by characterizing a given transmission path with an optimal bandwidth learned from characterization results. Based on observations of a data path during transmission phase, for instance by a packet trace, the bandwidth used and level of utilization are determined and an optimal bandwidth is stored in memory and used for a next file transfer to the same end system. The advantage of the optimization procedure is high throughput, i.e., short delay, by keeping a high bandwidth utilization with regard to low overallocation. The user does not have to estimate a vague value for the bandwidth reservation.

Abstract: A node configuration system with identical nodes includes a master 10 connected to a plurality of identical servant nodes 12-18 through a shared communication link (or bus) 20 and an unshared communication link (daisy-chain) (28,34,38,44,48). The master 16 assigns a unique identifier to each of the servant nodes 12-18, sequentially and individually, in a clockwise (CW) direction by sending configuration messages on the shared bus and configuration enable signals on the unshared link. The process begins with the master setting its configuration enable signal (CW-Cout port 24) to one and broadcasting a configuration message on the bus 20, which configures the servant node 12. As each servant node is configured, it sets its CW-Cout port to one which enables the next node in the chain to be configured. This process continues until all the servants 12-18 have been configured. In the event of a fault, the master 10 attempts to configure the remaining servant nodes in the counter-clockwise (CCW) direction.

Abstract: A method for use in an electronic switching system (ESS) analyzes M.times.N sets of line signals communicating between itself and at least one other ESS. At a first step, two previous sending and receiving line signals for a voice channel from each of the two ESS's are provided as a first pair of line signals. At a second step, two current sending and receiving line signals from each of the two ESS's form a second pair of line signals. At a third step, each of the line signals in the second pair is compared with its corresponding line signal in the first pair to check whether at least one line signal in the second pair is different from the corresponding line signal in the first pair. At a fourth step, if the checked result is negative, the second and the third steps are repeated for a predetermined duration, and if otherwise, a time interval value between one of the line signals in the second pair and its corresponding different line signal in the first pair is calculated.