Abstract: The present invention relates to a system and method for reliably transmitting data over wireless communication channels. The invented system 10 comprises a transmitting device 12 having an error control coding circuit 20 and an interleaver circuit 22 in communication with each other. The invented system 10 also includes a receiving device 14 having an error control decoding circuit 26 and a de-interleaver circuit 28 in communication with each other. The transmitting device 12 and the receiving device 14 communicate over a wireless communication channel 16. The error control coding circuit 20 applies an error control code to the data before it is transmitted over the communication channel 16. The data is also interleaved prior to being transmitted. After transmission over the communication channel 16, the data is de-interleaved and any transmission errors are detected and corrected.

Abstract: Shells fired from the gun of a ship create an underwater explosion that is used to drive a sonar system. Sonobuoys [201] and/or a ship-towed array measure acoustic signals caused by the underwater explosion. A ship processing component [306] analyzes the signals and locates reflections of objects [102] in the signals. In addition to controlling the location at which to fire a shell, an adjustable fuze on the shell may be set to thereby control the depth at which the shell explodes. The low-frequency impulsive nature of the explosion makes it particularly suited for detecting objects in a littoral environment.

Abstract: A system assures quality of service provided by a distributed network having at least one object. The system creates a contract that stores levels of quality of service offered by the network, determines a quality of service required by the object, and evaluates the contract to select a level of quality of service that corresponds to a current quality of service provided by the network. The system then compares the current quality of service to the required quality of service, and adjusts the current quality of service to obtain the required quality of service when the current quality of service fails to satisfy the required quality of service.

Abstract: A system facilitates two-way messaging in a network that includes at least one paging device. The system includes a paging service provider and a server. The paging device generates a message intended for a called party and transmits the message to the paging service provider. The paging service provider forwards the message to the server. The server translates the message to a form used by the called party and sends the translated message to the called party.

Abstract: A system reduces the number of blocked and abandoned calls in a wireless communication system. A cell site receives a call from a wireless station and determines that no available resources exist. In response thereto, the blocked cell site sends a retry message to the wireless station to redirect the call back to the originally blocking face of the cell site.

Abstract: This invention addresses Media Access Control (MAC) routing protocol that accounts for QoS constraints for IP traffic in MANETs. Methods and systems consistent with this example use a decentralized algorithm that is run by the participating nodes with a minimal amount of control packets adding to network overhead. Methods and systems consistent with this invention calculate a maximum available bandwidth (MAB) metric used in the MAC protocol. The MAB, along with other information may be shared among nodes in the MANET. The shared information is also used in computing the traffic loads in other parts of the MANET, and in identifying the available links that could support the QoS requirements. Then, the information concerning available links is used in the MANET routing algorithm.

Abstract: Methods and systems are provided for performing interactive directed data analysis. An interactive data analysis tool provides a user interface that receives a model from a data mining system. The tool computes specified business metrics representing business measures of quality reflected by the model. The model parameters may be manipulated by a user. Each time parameters of a model change, the business metrics are re-computed, thereby promoting directed data understanding by allowing a user to immediately see the impact of any changes made.

Abstract: A navigation system for an unmanned ground vehicle (UGV) includes an MPEG encoder that pre-processes frame data from a plurality of cameras on the UGV before the data is used to generate maps that identify objects in the vehicle's field of view and that identify terrain characteristics. The MPEG encoder converts the red-green-blue (RGB) data into luminance-chrominance (YUV) data. The luminance and chrominance data for each frame are divided into blocks for determining motion vectors, average chrominance values, and spatial frequencies for each block. A range map identifying objects is generated from the motion vectors and average chrominance values, and a slope map identifying terrain characteristics is generated from the spatial frequencies.

Abstract: In a cryptographic device (140) storing a number of templates (310), a system and method for supporting authentication services is provided. The cryptographic device (140) receives inputs representing a request for authentication services. The cryptographic device (140) then compares the syntax of the input to the syntactic constraints defined in one of the templates (310), where each template (310) includes syntactic constraints associated with at least one authority. When the cryptographic device (140) determines that the syntax of the input is consistent with the template (310), the cryptographic device (140) validates the input.

Abstract: A network for routing packets includes multiple nodes. A first node has a direct link to a second node. The first node receives a packet and identifies a primary next hop to which to transmit the packet (410). The primary next hop identifies at least the second node. The first node transmits the packet to the second node (420), determines whether the transmission was successful (430), and identifies at least a third node when the transmission to the second node was unsuccessful. The first node identifies the third node by: finding a node in the network that has a direct link to both the first and second nodes (440); identifying at least one alternate next hop, assuming that the link between the first and second nodes is unavailable, determining the cost associated with each of the alternate next hops, and selecting one of the alternate next hops based on the determined cost (640); or retrieving a predetermined alternate next hop from a forwarding table stored by the first node (940).

Abstract: The system automatically generates electronic commands necessary to modify or provision different types of program control switches as may be included in a public switch telephone network. A data schema and organization of tables and data structures provide for command generation for each of the different switch types. Additionally, a self-modifying dynamic data structure is used as a common area to communicate information between various programs and formulate the commands due to a limited number of parameters used to communicate information between programs that generate the command for the switches. A technique for verifying switch commands automatically generated by a second new provisioning system is described. A technique is described for automatically extracting switch specific commands and options as generated by a first system for use in populating data stores used in a second system for command generation.

Abstract: A communication device sends a message to one or more recipients in a communications network. The communication device retrieves device identifiers from a list of device identifiers stored in a memory of the device. The device identifiers include audio, pictorial and/or video data. The communication device presents the audio, pictorial and/or video data to a user of the device in auditory or visual form (1310) and then receives user input in response to the presented data (1325). The communication device designates a second communication device as a destination for the message based on the user input (1330). The communication device then sends the message to the second communication device.

Abstract: A method of generating a authentication code (“MAC”) with improved error tolerance exhibits improved survivability against acceptable signal distortions such as recompression. A method of generating a message authentication code associated with an image includes receiving blocks of image coefficient data where each coefficient has an original value falling within a range of values. The range of values is divided into first and second regions both having allowed coefficient values, and an error tolerance buffer region formed between the first and second regions having disallowed coefficient values. The original values of DC coefficients from each block of the image coefficient data is mapped to a modified value contained in one of the first and second regions, but not contained in the error tolerance buffer region. A MAC is generated as a function of the most significant bits of the modified image coefficient values.

Abstract: Disclosed is a method and device for storing information about Web documents such as pages or sites in a manner which may be used in conjunction with inverted term lists to facilitate the retrieval of documents of interest from the Web. The method involves constructing compressed surrogates for documents, such that various operations may be performed without the need to retrieve a copy of the document from the Web. The method permits the efficient updating of inverted term lists when documents on the Web have been modified or deleted, and also permits the efficient processing of search queries in a variety of circumstances.

Abstract: Provided herein is a linear programming-based algorithm to estimate the clock skew in network delay measurements based on one-way delay measurements. The algorithm has the time complexity of O(N), leaves the delay after the skew removal positive, and is robust in the sense that the error margin of the skew estimate is independent of the magnitude of the skew. The algorithm is understood to be unbiased, and the sample variance of the skew estimates is small.

Abstract: A communications system for communication among plural stations in a network has stations (CH1, CM2, CM3, CH4, CH5, CM6, CM7) arranged in clusters (1a, 1b, 1c) of communication member stations, each communicating with each other. One of the member stations (CH1, CH4, CH5) is a head station of the cluster. The cluster head stations (CH1, CH4, CH5) communicate with other cluster head stations (CH1, CH4, CH5). A method for configuring the network of stations includes a step of operating at least a first (CH5) and a second (CH4) station of the plural stations as cluster head stations, the first (CH5) and second (CH4) stations forming a communications link. The method also includes a step to resign the first (CH5) station from operating as a cluster head station when a predetermined resignation condition is met.

Abstract: A radiotelephone (10) simulates the call origination process performed by land-line telephones. Dial tone is generated (78) in response to an off-hook condition and removed when a first digit (54) is dialed. A timer process (84, 110) and a number analysis process (100) simultaneously evaluate dialed digits to detect the completion of dialing. The number analysis process (100) identifies seven, ten, and eleven digit, and indeterminate length phone number formats (64, 66, 52, 68). The ten digit format is recognized in response to remotely programmed (42) connected NPA codes. For most calls, the number analysis process (100) instantly detects a phone number's final digit (62). In a few cases the timer process (84, 110) detects the final digit through the absence of dialing activity for a predetermined duration. When the final digit (62) is detected, an origination message is transmitted to a cellular network.

Abstract: As demand for data services expands, users expect untethered (“wireless”) systems to provide a same level of service as their tethered (“wired”) systems. Described herein are systems and networks for providing high bandwidth wireless connectivity with user broadcast throughput of at least 1 Mbps. This connectivity is may be used in stationary, portable, and mobile computing environments. A communication system is described having a radio card for electrical communication with a transceiver. A wireless area network is described having a communication system and a wireless local area network adapted for broadcast communication with the communication system. The wireless local area network comprises one converter having a point-to-multipoint radio having at least a 10 MHz bandwidth, and another converter having a point-to-point radio having at least a 10 MHz bandwidth. The wireless local area network may form a cell of a plurality of cells in a wireless metropolitan network.

Abstract: A system penalizes callers for annoying voice calls. The system identifies a caller (540) associated with a call to a called party in response to invocation of a feature activation code by the called party. The system records the occurrence of the feature activation code invocation (550) and notifies a billing entity (560) of the identity of the caller and the invocation of the feature activation code so that the billing entity can charge the caller for the call to the called party.

Abstract: This invention disclosure describes the application of a polarization insensitive acoustically-tuned optical filter used in a multichannel WDM system to equalize variations in the power level of the WDM channels. The invention also describes a simple means for providing a low frequency control system which enables the equalizer to determine the signal levels of N optical carriers prior to equalizing the signals.