Abstract: An optical label-switching method and apparatus in which a payload signal is modulated on an optical carrier through differential phase-shift keying (DPSK) by a Mach-Zehnder modulator (MZM), and a label signal is imposed on the DPSK signal by the same MZM through an optical amplitude change effected by modulating the DPSK drive signal or MZM bias.

Abstract: A circuit comprising an active pull-up device coupled to a level shift circuit is coupled to a one-wire bus to allow communication devices coupled to the bus to better detect digital communication signals propagating through the bus. The level shift circuit provides a reference voltage signal that is typically above the circuit ground. Communication devices coupled to the bus are better able to detect digital communication signals propagating through the bus because such signals are raised above at least a portion of the noise signals on the bus.

Abstract: The inter-switch interconnect system functions to interface a packet switch with a legacy Time Division Multiplexed switch without requiring any changes to the Time Division Multiplexed switch. The inter-switch interconnect system implements a packet-based call connection system that is triggered by the standard CCS7-ISUP signaling protocol, where the packet-capable Time Division Multiplexed switch controls the set-up and tear-down of the packet connections through the Asynchronous Transfer Mode network to the non-packet-capable Time Division Multiplexed switch using the standard CCS7-ISUP signaling protocol for both incoming and outgoing calls. The packet-capable Time Division Multiplexed switch controls call connections both to and from the legacy non-packet-capable Time Division Multiplexed switch.

Abstract: A shared medium provides a limited amount of bandwidth for communication between nodes. A contention based access protocol is used to access the medium from the nodes. A guaranteed amount of the bandwidth is reserved for quality of service transmission. A controller computes amounts of assigned bandwidth for the nodes so as to track an on-line predicted demand for bandwidth of each node. The amounts of assigned bandwidth are computed so that the sum of the amounts of assigned bandwidth not exceeding a total available amount of bandwidth minus the amount of guaranteed bandwidth reserved for quality of service transmissions. The controller sets regulators in the respective nodes so as to prevent the nodes from attempting to use more than the amounts of assigned bandwidth for the nodes for transmissions other than quality of service transmissions.

Abstract: Embodiments of the system, and method provide for identification of a number being dialed on an incoming call to a multi-line terminal. The method may have the steps of: receiving a call at a network, the call being for a multi-line terminal having at least two different numbers; checking a mobile subscriber database for a data entry indicative of the terminal being a multi-line mobile terminal; and presenting not only caller identification information to the called terminal, but also presenting the number that was dialed by the calling party so that a called party would know which of the at least two different numbers was being called. The multi-line terminal may be a multi-line mobile terminal that has at least two distinct and independent numbers assigned thereto.

Abstract: A flexible scheduler in an ATM switch. The scheduler enables each connection to be served fairly according to associated quality of service parameters, while enabling several other features. A connection can be shaped while minimizing additional memory and processing requirements. Specifically, the conformance time of cells of a connections need not be stored when significant backlog exists in the transmission of the cells. The shaping rate can be dynamically varied. Sequence of cells forming a frame are buffered in the ATM switch until the end of frame cell is received. All the cells of a frame are then sent in quick succession.

Abstract: A system for, and method of, emulating hardware failures and a Joint Test Action Group (JTAG) test tool incorporating the same. In one embodiment, the system includes: (1) a vector generator configured to generate at least one device failure emulation vector and (2) a JTAG interface associable with the vector generator and configured to deliver the device failure emulation vector to hardware thereby to test system software associated with the hardware.

Abstract: A method for establishing a call between a calling party and at least one called party via a call switching network. The method includes calculating a call charge per minute rate based upon a number of rate-determining parameters, notifying the calling party of the call charge per minute rate, receiving input from said calling party based upon the call charge per minute rate; timing the call, calculating the balance available for the call, informing the calling party of the balance in real time, and disconnecting the call when the call balance is zero.

Abstract: An efficient hashing technique uses w 2 + w 2 operations to hash a string “w” words long rather than the w2 operations of the prior art. This efficiency is achieved by squaring the sum of the key and the string to be hashed rather than forming a product of the key and the string to be hashed h(m)=((m+a)2 mod p)mod 21.

Abstract: A call is indirectly established by triggering a call register to request a mobile switching center, associated with a mobile station, to establish a call between the mobile station and a second party.

Abstract: A system and method for controlling call admission in a wireless communications network recursively estimates reverse link load levels as a function of changes in base station receive power and/or the number of mobiles served in the cell/sector. In one implementation, a call admission controller utilizes multiple load level estimating methods, whereby a first method estimates load as a function of changes in base station receive power and changes in the number of served mobiles. The call admission controller uses a second method to recursively update load level estimates as proportionally changing with number of users. The call admission controller may utilize a third estimate method as an accuracy check based on a changes in base station receive power measurements. The call admission controller outputs a call blocking command when load level estimates exceed a threshold to avoid cell/sector overload conditions and network instability.

Abstract: This invention relates to a method and apparatus for assessing quality of service for communication networks. More particularly, the invention is directed to assessing quality of service in circuit and packet switched networks by way of a computer simulation. Preferably, the information necessary to conduct the assessment activity is available via the internet from a web server that also compiles statistical data on the resultant quality of service assessments.

Abstract: Systems and techniques for scheduling of data transmission to remote mobile units so as to provide at least an acceptably low level of delay. A scheduler computes an urgency value for each data stream serving a mobile unit and sets the urgency value equal to the highest urgency value of a data stream serving the mobile unit. The scheduler computes a scheduling priority for each mobile unit based on a computation that takes into account the urgency value of the mobile unit and schedules the highest priority mobile unit for service, selecting the highest priority data stream serving the mobile unit scheduled for transmission. The urgency value for a data stream depends on the sensitivity of the data stream to delay and the delay experienced by the data stream. Computation of the urgency value may take into account a delay limit associated with the data stream.

Abstract: Orthogonal sequences can be developed and used for use training and synchronizing in CDMA and TDMA systems. In particular, once a sequence is developed that has the length of the product of the channel length and the number of transmit antennas, the sequence is offset by a different amount for each transmit antenna. For example, each sequence could be offset by a multiple of the channel length for each transmit antenna, where the multiple ranges from 0 to N?1, where N is the number of transmit antennas. Furthermore, by not using exactly the same amount of offset shifting for each transmit antenna, e.g., not having each signal offset by the channel length, but keeping the overall total shifting the same, e.g., the average of each shift is the channel length, it is possible to determine at a receiver from which transmit antenna a particular signal originated.

Abstract: A system and method for providing improved teleservice messaging to a mobile station in a wireless communication network are disclosed. In preferred embodiments, an indication is provided to a network sending entity of the maximum teleservice payload size that can be sent by the network sending entity to the mobile station via network receiving entities serving the mobile station. The payload size indication is utilized by the network sending entity to format the size of teleservice messages sent by the network sending entity to the mobile station via the network receiving entities.

Abstract: A colorless, waveguide-grating-router-based tunable dispersion compensator includes a planar lightwave circuit and a deformable mirror, optically coupled to each other by a plano-cylindrical glass lens such that a fast tuning speed and single-knob dispersion adjustment are obtained. In a further aspect of the present invention, the waveguide-grating router is pinched, symmetrical about its center line, and has a half-wave plate inserted therein to provide polarization independence. In a still further aspect of the present invention, the deformable mirror includes, reflective film attached to opposing piezo-electric actuators.

Abstract: In a school bus tracking system, each school bus is provided with a mobile station and an ID. The bus ID's and telephone numbers for the buses' mobile stations are stored in a tracking application/database. At a residence, a parent sends a message to the tracking application that includes the ID of a bus that services the residence, and a radius. The message may be sent using a short message service, i.e., a text message to a particular address utilized by the tracking application. Then, the tracking application causes the locations of the bus mobile station and the parent's mobile station to be periodically polled. When the bus mobile station comes within the radius, the tracking application issues a message to the parent mobile station alerting the parent that the bus is approaching. The system may be used to track other vehicles, objects (e.g., packages), and/or persons.

Abstract: An application server component of an apparatus in one example receives one or more notifications of one or more open communication sessions from one or more first communication devices. The application server component sends one or more of the one or more notifications of one or more of the one or more open communication sessions to one or more second communication devices. Upon a request by a communication device of the one or more second communication devices to join an open communication session of the one or more of the one or more open communication sessions, the application server component initiates a connection of the communication device to the open communication session.

Abstract: Radio Frequency Identification (RFID) tags and an antenna grid are used for automatic determination of cable connections. An RF antenna grid is advantageously employed on a device having a plurality of device ports (e.g., cable connection points) which may, for example, be physically organized in a two-dimensional arrangement. Then, when RFID tags are fixed to one or more cable ends, it can advantageously be determined which of the one or more cables are connected to which of the ports on the device. The RF antenna grid may comprise a plurality of individual antennas which are advantageously multiplexed such that a single RFID reader can handle the sensing for all antennas. Also, opposing ends of a given cable may be advantageously provided with RFID tags having related ID codes such that connections which exist between two connected ports of the device may be easily and efficiently determined.

Abstract: A system and method of the present invention revives a catastrophic code used for channel coding data. A data receiving circuit receives a digital input data sequence to be coded with a code having a distance spectrum containing an infinite component that corresponds to a finite hamming weight such that the code may cause catastrophic error propagation. The circuit is operative for periodically inserting known symbols into the digital input data sequence. An encoder, such as a convolutional encoder, is operatively connected to the data receiving circuit and encodes the digital input data sequence.