Abstract: A system for visually representing user behavior within an interactive voice response (IVR) system of a call processing center generates a complete sequence of events within the IVR system for plural calls to the call processing center, the plurality of calls being recorded from end to end. A call flow of the IVR system is modeled as a non-deterministic finite-state machine, such that a start state of the finite-state machine represents a first prompt of the IVR system, other states of the finite-state machine represent subsequent prompts at which a branching occurs in the call flow of the IVR system, exit conditions are represented as end states, and transitions of the finite-state machine represent transitions between call flow states triggered by data inputted by a user or by internal processing of the IVR system. The complete sequences of events for the plural calls are provided to the finite-state machine to produce a two-way matrix of several counters.

Abstract: A system (800) improves a network designer's ability to analyze a data network having several routers. The system (800) accesses static routing information and/or open shortest path first route summarization information, determines an identity of a network prefix using the accessed information, and analyzes the data network using the determined identity. The network designer can use this determined identity for traffic analysis or modeling of the data network.

Abstract: A network processor [200] performs Cyclic Redundancy Check (CRC) operations using specialized hardware circuits [308-308]. The network processor [200] includes a plurality of hardwired CRC polynomials that are used to implement the CRC operations. A CRC instruction selects which polynomial to use when performing the CRC operation.

Abstract: The invention enables hosts that do not share a network prefix to communicate in the event the hosts are unable to communicate with a router.

Abstract: A method and system for attenuating noise including arranging a plurality of accumulators (210, 310) to form a transmittance path for compressible flow mass and noise between a noise source (212, 312) and the external environment (218, 318), and selectively accumulating and confining compressible flow mass and noise within at least one of the plurality of accumulators, and attenuating noise confined within the at least one accumulator by ringdown. The system may include a plurality of interruptors/valves (220, 320) which are operated at respective timings for periodically accumulating and confining compressible flow mass and noise in at least one of the plurality of accumulators.

Abstract: A method and apparatus (2, 20) are provided for transmitting a message from a first node (A) to a radio-silent node (S) in a network. The network includes a plurality of nodes. A location area corresponding to the radio-silent node (S) is determined. A set of nearby routers (Z0–Z10) within the location area is identified. The message is transmitted from the first node (A) to the set of nearby routers (Z0–Z10). Each router of the set of nearby routers (Z0–Z10) that receives the message retransmits the message for the radio-silent node (S).

Abstract: A system for conserving energy in a multi-node network (110) includes nodes (205) configured to organize themselves into tiers (305, 310, 315). The nodes (205) are further configured to produce a transmit/receive schedule at a first tier (310) in the network (110) and control the powering-on and powering-off of transmitters and receivers in nodes (205) in a tier adjacent (315) to the first tier (310) according to the transmit/receive schedule.

Abstract: A method (36) for providing a current location (35) of a wireless communication device (24) within a wireless communication network (20) calls for activating an automatic location identification (ALI) process in response to a request from an authorized requesting party. An indicator (106) of the current location (35) is provided to the authorized requesting party via a map-enabled web page (100).

Abstract: Systems and methods for locating the shooter of supersonic projectiles based on shockwave-only measurements are described. Muzzle blast signals are neither sought nor required. The system uses at least five, preferably seven, acoustic sensors that are spaced apart at least 1 meter. The sensor signals are acquired with a time resolution in the order of microseconds and processed to find and disambiguate the shockwave arrival angle unit vector. Two different Time-Difference-Of-Arrival (TDOA) measurement techniques are described, with one technique using counters in each signal channel and the other technique using cross-correlation between signal channels. A genetic algorithm can be used to efficiently disambiguate the results.

Abstract: A variable reluctance load cell for measuring the static or slowly fluctuating load, or tension, on devices is contained in a support tube. A sensor in the tube utilizes opposing C and I shaped magnetic cores attached to opposing ends of the support tube. A magnetic circuit is formed having an inductance defined by the size of the gap between the magnetic cores with the reluctance dominated by the gap. The sensor inductance is coupled with a fixed, predetermined capacitance in a resonant LC circuit, and the resonant frequency is a function of the gap. The sensor is in a cavity within the tube, and the cavity is sealed in a manner that prevents water or other damaging agents from entering the sensor. In this manner, mounting the sensor and tube to a static device and measuring the AC voltage at the sensor, the amount of load, or stress can be determined.

Abstract: An apparatus and method for monitoring the performance of an interactive voice response (IVR) system used by an automated call processing center generates logs of call activity, determines routing information from the logs, notes predetermined significant activity in agent-caller dialog portions of calls routed to an agent in the logs, and determines at least one quantity correlated to a true intention of callers. A performance model of the IVR system is generated from the logs. The logs, the routing information, the quantity correlated to the true intention of the callers, and the performance model are analyzed to determine a performance value of the IVR system, which is used to monitor the IVR system.

Abstract: A method (36) for providing location information of a wireless communication device (24) within a wireless communication network (20) calls for determining the coverage areas (26) of particular cell sites (22) through which the device (24) communicated during past calls. These coverage areas (26) are defined as the approximate location information for the device (24) and are provided to an authorized requesting party via a map-enabled web page (156).

Abstract: The invention can enable routers in a region to share information about nodes on foreign sub-networks. The information includes the nodes' and routers' respective network layer addresses. Upon receiving a message addressed to one of the nodes, a router can tunnel the message to a router on the node's foreign sub-network for subsequent de-tunneling and delivery to the node.

Abstract: In a communication network in which each of plural nodes (110 . . . 120) has an assigned node identifier, a node signature (step 505) is generated by each node from an identifier of a component (e.g., 201) of the node or from statistical processing of information in the node. Each node distributes information data (300) that includes its assigned node identifier and its generated node signature (405). The node signatures in information data at a node having the same node identifier are compared (step 710) to detect whether the node signatures for the same node identifier are different. The operation of the network is modified (e.g., 640, 725, 825 or 915) in response to detection of different node signatures for nodes having the same node identifier. The modification (725) may include removing all but one node of the nodes of the same node identifier detected as having different node signatures from network participation.

Abstract: The present invention helps increase the reliability, throughput, and ease-of-configuration for data networks. The invention sets “time-to-live” (“TTL”) values for packets which may be routed through a network within a router based on a selected route, rather than by a host computer or using a fixed pre-configured value. Upon receiving an incoming data packet from a host computer, a TTL value is set which tailored to network conditions and the route selected. The data packet is then routed within the network using the tailored TTL and is discarded more quickly than if a large default value were used.

Abstract: A system and method for performing source path isolation in a network. The system comprises an intrusion detection system (IDS), a source path isolation server (SS1) and at least one router configured to operate as a source path isolation router (SR1) operating within an autonomous system. When IDS detects a malicious packet, a message is sent to SS1. SS1 in turn generates a query message (QM) containing at least a portion of the malicious packet. Then, QM is sent to participating routers located one hop away. SR1 uses the query message to determine if it has observed the malicious packet by comparing it with locally stored information about packets having passed through SR1. SR1 sends a reply to SS1, and SS1 uses the reply to identify the ingress point into the network of the malicious packet.

Abstract: In a radio network having plural routers (10, 12, 14, 16, 18), each router includes a routing table (101, 121, 141, 161, 181). Link state information of the network that has been forwarded to the router is received and used to determine the connections in the network. The determined network connections are collected to generate network topology information which is placed in the routing table (101, 121, 141, 161, 181). The network topology information is retrievable for inclusion in messages forwarded by the receiving router.

Abstract: Methods and systems are provided for sequence number checking. Sequence numbers of data packets are compared to a “sliding” window. The sliding window indicates a range of sequence numbers considered valid (or invalid). The size of the sliding window may be a particular value or varied. If a sequence number is “below” the sliding window, then it may be considered invalid. If a sequence number is within the sliding window, then it may be further checked to determine if a duplicate sequence number has been received. If a sequence number is “above” the sliding window, then it may be considered valid and the sliding window is advanced. The sliding window and sequence numbers are processed using multiple level bitmaps, which indicate a historical state of sequence numbers received. Furthermore, the multiple level bitmaps may comprise summary bits to summarize a state of subsequent bits.

Abstract: A system for measuring network performance parameters includes multiple network nodes (125) and at least one collection agent (130). Each of the multiple network nodes (125) calculates signature values for received packets. Each of the signature values includes an identifier for a corresponding packet. The collection agent (130) collects the signature values from the multiple network nodes (125), and determines one or more network performance parameters based on the collected signature values and network topology information.

Abstract: A method is provided to operate a communications node (2) in a network including a plurality of nodes. The communications node (2) includes a transceiver (6) to transmit and receive messages. The communications node (2) has at least one communications link with a first node of the plurality of nodes. The method includes the steps of: (i) determining path loss information across the at least one communications link by evaluating power data corresponding to a received signal from the first node; (ii) distributing the path loss information to the network; and (iii) routing messages to the network based on path loss information.