Abstract: In the method, each transmitting endpoint separates its traffic to be transmitted into distinct queues. The packet at the head of one queue is transmitted, and no other packet is transmitted until a transmit complete signal (TCS) is generated. When a packet is received without error and accepted by a destination endpoint, the destination endpoint returns an acknowledgment indicating successful reception. The TCS is generated at the transmitting endpoint when the receiver acknowledgment should have been received. When the TCS is processed by the transmitting endpoint, if a receiver acknowledgment has been received, the packet previously sent is removed from the head of its queue. Otherwise, the packet is left at the head of its queue, the queue is placed in a “pending retry” state, and a timer is started. When the timer expires, queues are moved out of the “pending retry” state, enabling their packets to be transmitted again.

Abstract: A method and apparatus are disclosed for remotely identifying software and software versions using a maintained software audit file. The disclosed system management tool (SMT) identifies software installed on each network node by comparing the name and size of installed files to a software audit file. The system management tool (SMT) performs an inventory scan of the software on each network node and obtains a list of each file and the corresponding file size. The software audit file provides identifying information, such as the file name and corresponding size, for each known file. Known files can be quickly identified using a match criteria based, for example, on the file name and size. The software audit file is maintained by investigating any unknown files with a sample of the user population having the unknown file. In one implementation, a targeted query is automatically transmitted to a sample of the user population having the unknown file requesting header information for the unknown file.

Abstract: A method for interleaving information to be conveyed over a TDMA wireless communication system. A certain portion of information associated with a user is transmitted during one time slot and the remaining information for that user is intermingled with other information for that user and transmitted in a subsequent time slot.

Abstract: Rather than including a static network descriptor in messages transmitted between master and slave Bluetooth-enabled devices communicating on a piconet, which network descriptor is computed as a known function of the master's Bluetooth address (BD_ADDR), the network descriptor is changed each time a new session beings on one of the devices. This prevents an intentional eavesdropper, who may be in proximity to the piconet and who may be listening for and detecting the network descriptor included within these messages, from associating a detected network descriptor with a particular device of a user and thereafter using that network descriptor to track the location of the user who is carrying and using that device. The network descriptor, the channel access code (CAC), is changed each time a new session begins by computing it as a known function of a seed and the master's BD_ADDR, wherein the seed is a random number chosen at the beginning of each new session by the master.

Abstract: Inter-frequency handoffs in a CDMA or other wireless communication system are controlled using a noise-limited coverage trigger metric which is able to distinguish between same-frequency cell boundaries and other-frequency cell boundaries in the system. The trigger metric may be generated as a function of an average signal-to-noise measure for pilot signals received at a mobile station of the system and a linear sum of the signal-to-noise measures. The signal-to-noise measures may be generated in the mobile station and included in messages transmitted from the mobile station to one or more base stations of the system. The trigger metric is used to control a handoff from a current frequency to a new frequency in an ongoing call. The trigger metric may alternatively be based on a measure of mobile receive power alone.

Abstract: A system for, and method of, generating an extended source electronic mail (e-mail) address for use between a sender and a recipient and systems and methods for creating e-mail messages having a destination-dependent extended source address structure. In one embodiment, the system includes: (1) an extension generator module, associated with the sender, that generates a valid extended source address that is based on the identity of the recipient, (2) an e-mail transmitter, associated with the extension generator module, that transmits the e-mail message containing the valid extended source address to the recipient and (3) a message receiver module, associated with the extension generator module, that classifies incoming e-mail messages based on valid extended source addresses.

Abstract: An enclosure includes spaced apart sidewalls and a bottom wall, rear wall, and top cover each forming an RF tight seal with the sidewalls, and defining separate chambers for a plurality of circuit packs. The edges of the sidewalls, bottom wall and top cover at the entrance to each chamber are configured to form an RF tight seal with the faceplate of an installed circuit pack. A fluid for cooling the circuit pack enters each chamber and a baffle allows the fluid to escape while being resistant to the transmission of RF energy. Surfaces of the sidewalls that are interior to each chamber are able to disrupt and absorb a substantial portion of the RF energy radiating from the enclosed circuit pack and thereby minimize the level of RF energy within the chamber.

Abstract: In accordance with one embodiment of the invention, a broadcast server system computes a feasible stretch value for use in scheduling job requests. A stretch value provides an indication of the delay experienced by each job request to complete, when the broadcast server processes many jobs concurrently. A processing time is calculated for each job request based on, the size of the job request and the bandwidth of the server downlink. Thereafter, a stretch value is proposed. The server system computes a deadline for each job to be the arrival time of the job request plus the product of the processing time and the proposed stretch value. Thereafter, each job request is scheduled, based on an “earliest deadline first” arrangement, wherein the job request that has the earliest deadline is scheduled first, the job request having the next earliest deadline is scheduled second, etc. The proposed stretch value is deemed feasible if each pending job request can be completed prior to its deadline.

Abstract: A method and apparatus to quickly adjust a targeted Eb/N0 in a wireless communication system by using an effective Eb/N0 for each frame. The Eb/N0 distribution of a frame produces a certain frame error rate. Effective Eb/N0 is the Eb/N0 that would produce the same frame error rate in a model channel, such as an additive white Gaussian noise (AWGN) channel. The effective Eb/N0 for each frame is obtained and compared to a model targeted Eb/N0. The Eb/N0 for all of the power control groups in one frame compose the vector Eb/N0. The effective Eb/N0 for the frame is obtained by mapping a vector Eb/N0 into a scalar. The model targeted Eb/N0 is the Eb/N0 value that produces a desired frame error rate in the model channel. The targeted Eb/N0 is increased by one up step size when the effective Eb/N0 is smaller than the model targeted Eb/N0 and is decreased by one down step size when the effective Eb/N0 is larger than the model targeted Eb/N0. Eb/N0 are measured for each power control group in a frame.

Abstract: A wireless-global positioning system determines the location of a wireless mobile communication device from reliable position measurements and wireless network downlink measurements. The wireless network downlink measurements obtained are then used in conjunction with a database for pattern matching or contour matching. The difficulty of building and maintaining that database is alleviated by using those network downlink measurements associated with the reliable position measurements to populate the database, such as GPS measurements or those obtained through enhanced based positioning technique (EOTD). The increased database accuracy subsequently improves the quality of position location measurements from the wireless network.

Abstract: A multimode interference coupler having a tunable power splitting ratio and a method of tuning the splitting ratio. The tuning of the power splitting ratio is achieved by varying an effective refractive index around a portion in a multimode interference section.

Abstract: The specification describes ceram-glass compositions useful for electro-optic devices. The compositions have active ferroelectric ingredients in a tellurium oxide host. Proper processing of the ceram-glass produces highly transparent material with desirable ferroelectric properties. The ceram-glass materials can be used for electro-optic devices in both bulk and thin film applications.

Abstract: A method for access control in a wireless network having a base station and a plurality of remote hosts includes the optional abilities of making dynamic adjustments of the uplink/downlink transmission ratio, making dynamic adjustments of the total number of reservation minislots, and assigning access priorities by message content type within a single user message stream. The method of the invention further provides for remote wireless host paging and for delayed release of active channels by certain high priority users in order to provide low latency of real-time packets by avoiding the need for repeated channel setup signaling messages. In the preferred embodiment, there are N minislots available for contention in the next uplink frame organized into a plurality of access priority classes. The base station allows m access priority classes.

Abstract: Disclosed is a system and method for converting modes in an optical network. Briefly described, the system comprises an optical pathway extending from an exit face of a single-mode waveguide to an entrance face of a multimode waveguide. A first ball lens and second ball lens are located in the optical pathway, with an optical link gap located the first and second ball lenses.

Abstract: A simplified method for sampling timing adjustment and frequency offset estimation in a TDMA cellular PCS environment using &pgr;/4 - shifted DQPSK comprises the steps of oversampling a received signal resulting from transmission of sequences of complex-valued symbols at a rate N times the symbol rate thereof so as to produce N sets of samples, comparing for each set of samples the differential phase angle between successively received complex-valued symbols, and determining which set of the N sets of samples has differential phase angles closest to ideal values to thereby obtain an optimal sampling timing. The differential phase angles are measured by multiplying a complex conjugate of a received complex-valued symbol and a succeeding symbol to produce a comparison vector having an angle equal to the differential phase angle between the received complex-valued symbol and the succeeding symbol. The differential phase angles are optionally rotated so that the angle thereof is between 0° and 90°.

Abstract: Unlike earlier methods and systems in which Radio Link Control (RLC) performance was characterized in terms of the throughput, and the size of the higher layer Protocol Data Units (PDUs) or packets to be transferred was ignored, a method and apparatus is provided that is based on the delay of a higher layer PDU or packet. A method and apparatus so based have less delay than a method and apparatus based on employing adaptive coding and modulation to achieve the greatest mean throughput of a data block.

Abstract: This Generalized Processor Sharing (GPS) is the basis for the packet scheduler of choice in IP routers and ATM switches of the future. The currently accepted approach for the design of GPS schedulers is based on deterministic QoS guarantees, which, it is generally accepted, is overly conservative and leads to limitations on capacity. To address this problem we develop a framework for GPS scheduling which is based on statistical QoS guarantees and statistical multiplexing. We give the design of GPS weights which maximize the coverage of operating points, and also the design of the connection admission control (CAC). The general framework is end-to-end, with two heterogeneous QoS classes coexisting with a third, best effort class. Each QoS class has a specified delay bound together with a bound on the probability of its violation. An important objective is to maximize the bandwidth available to best effort traffic while just satisfying the guarantees of the QoS classes.

Abstract: An optical local area network uses modified remote network interface cards (NICs) to provide an optical carrier signal for signaling use by a centralized optoelectronic switch unit. The NIC optical transceiver is modified so that instead of being normally “off” during the standby mode, the data signal is logically inverted to be “on.” Light from each NIC is used to provide optical power for a corresponding optical modulator on the switch unit.

Abstract: A method and apparatus for deriving insertion losses for connections in a single-stage optical cross-connect. The optical cross-connect comprises a number (N) of input ports, a number (M) of output ports and an on-board controller. A memory is provided on the on-board controller for storing N loss parameters for the N input ports and M loss parameters for the M output ports. A modeled insertion loss for a connection between any input port and any output port can be derived from the loss parameters associated with the input and output ports.

Abstract: A traffic monitor listens passively on the data link used to communicate among switching systems for setting up telephone calls for call setup messages and checks the call setup messages for destination telephone number. If it determines that the destination telephone number is for an Internet service provider (ISP), the system reports the point code of the originating office. By analyzing the output of the traffic monitor according to this invention, local exchange carrier (LEC) may reconfigure its network to remove feature rich switches from the ISP call delivery network and replace them with a small tandem-like switch.