Abstract: A computer implemented method for determining geometric impact of anchor placement on localization accuracy and the subset of anchors which mitigates the impact of measurement-induced noise.

Abstract: A method is provided for generating a test case for testing a program, which can include analyzing instructions of the program to identify basic blocks and superblocks, each basic block containing at least one executable instruction, and each superblock containing a plurality of basic blocks. The method can include executing instructions by a processor to perform determining respective weights of superblocks, each weight representing a number of basic blocks which require execution when the superblock is executed; determining the constraints which cause a superblock having a high weight to be executed, and using the determined constraints to generate a test case which, upon execution of the program, causes the high weight superblock to be executed.

Abstract: The present invention offers systems and methods for effective multiple-hop routing, multicasting and media access control for vehicle group communications that employ directional wireless radio technology. Multi-beam optic-wireless media and streamlined operations provide low-overhead communications among vehicles. Systems and methods are provided to maintain a quasi-stationary group of neighboring vehicles, enable high-throughput on-demand switching among multiple vehicles, enable group coding in the vehicle group to achieve higher throughput, and enable dynamic adjustment of link to maintain desirable vehicle group. The proposed solution builds upon the conception of a MAC-free wireless operation and quasi-stationary vehicular switched network to achieve ultra-low-overhead and high-throughput vehicle communications.

Abstract: The present invention advantageously provides several systems and methods for solving the trombone routing issues within an IMS/MMD network. These approaches avoid trombone routing, speed up handoff, and increase the efficiency of signaling and overall performance of an IMS/MMD network. These solutions can broadly be divided into the following categories. Piggy-backing SIP registration over MIP (Split at FA); Selective Reverse Tunneling and Tunneling between FA and P-CSCF; the SIP-based mobility protocol; use of CoA during SIP registration and call up in MIPv6; Piggy-backing SIP registration when HA and S-CSCF Co-exist; Using Dynamic Home Agents in MIPv4 FA-CoA; and the Interceptor-Caching Approach.

Abstract: According to some of the preferred embodiments, a method for proactively establishing a security association between a mobile node in a visiting network and an authentication agent in another network to which the mobile node can move includes: negotiating pre-authentication using a flag in a message header that indicates whether the communication is for establishing a pre-authentication security association; and one of the mobile node and the authentication agent initiating pre-authentication by transmitting a message with the flag set in its message header, and the other of the mobile node and the authentication agent responding with the flag set in its message header only if it supports the pre-authentication.

Abstract: The present application discloses, inter alia, a system for improving the aggregate throughput of a wireless local area network which includes: at least one access point that is equipped with at least one transceiver configured to simultaneously transmit and receive at multiple frequencies using multiple channels; and the access point being configured to acquire channel conditions of users and to pool sets of users on the channels based on the channel conditions.

Abstract: A system and method for modeling and evaluating resource requirements of services is disclosed. The system and method in one aspect enable describing an application session in a software model, for example, as a sequence of events in a sequence diagram, annotating the sequence diagram with information and using the sequence diagram and the information to create a mathematical model such as a Markov model that represents the application session. Once in Markov form the service can be analyzed. The system may include a user interface for allowing a user to enter annotations to the sequence diagram.

Abstract: Establishing and maintaining a moving ad-hoc network is provided. The ad-hoc network includes a plurality of equivalent cells communicationally linked together to form a linked equivalent cell network. An equivalent cell header manages each equivalent cell. Additionally, regular nodes, scattered throughout the equivalent cell network, may be provided. Regular nodes have restricted communication privileges compared to the equivalent cell headers. However, equivalent cell headers can be demoted to regular nodes and regular nodes can be promoted to equivalent cell headers as required by equivalent cell network.

Abstract: A method of automatic calibration in which the simulation adapts itself to more closely resemble the actual network is provided. For a given network architecture and a probabilistic customer usage profile a simulation provides an estimate of key performance metrics. These simulated metrics are compared against actual measurements from the network. To the extent that they do not match within a prescribed tolerance, an iterative adaptive calibration procedure is used to perturb slightly the probabilistic model of network usage.

Abstract: A network element or server that manages name, address and identifying information of network devices that contain at least one Bluetooth interface is described. A Bluetooth Device Address may be queried by a first network device of a second network device to the server and the server may provide additional name, address and identifying information on the queried second network device to the first network device such that the first network device may establish a preferred connection with the second network device.

Abstract: A method of tailoring data streams transmitted to networked user devices is disclosed in which environment information associated with each device is stored at an agent located on those devices. This environment information may include information related to the hardware, interface and application capabilities of the particular device. In another embodiment, this environment information is transmitted and stored at an agent at a local network gateway. And in another embodiment, the environment information is then stored at a mirror agent located in a backbone network of a service provider. By referring to this environment information, a service provider can tailor the transmission of data streams, such as multimedia streams, to a device based on the capabilities of the device and the associated network.

Abstract: Efficient secure password protocols are constructed that remain secure against offline dictionary attacks even when a large, but bounded, part of the storage of a server responsible for password verification is retrieved by an adversary through a remote or local connection. A registration algorithm and a verification algorithm accomplish the goal of defeating a dictionary attack. A password protocol where a server, on input of a login and a password, carefully selects several locations from the password files, properly combines their content according to some special function, and stores the result of this function as a tag that can be associated with this password and used in a verification phase to verify access by users.

Abstract: Systems, methods and programs for determining a question posed to a user during a user authentication process are provided. An example of a method for determining the question comprises obtaining user commercial activity, storing the user commercial activity by activity type, generating a set of candidate questions for a user based upon the user commercial activity, each candidate question in the set of candidate questions is associated with a score, selecting one candidate question from the set of the candidate questions based upon a first selection criteria, detecting a vendor placement opportunity in the selected candidate question by analyzing the user commercial activity and adding a vendor name into the selected candidate question based upon the detecting. The user commercial activity can be user purchases of goods and services from corresponding vendors. Lost Opportunities for the placement of an advertisement are detected and recorded.

Abstract: A method and communication device for routing unicast and multicast messages. The method for routing a unicast message includes receiving a first control packet including routing parameters from a group header node, updating a routing table based upon the routing parameters, receiving a second control packet including additional routing parameters from a group node, updating the routing table based upon the additional routing parameters and generating a forwarding table from the routing table when both of the updated steps are completed. The unicast message is routed based upon the forwarding table. A method for routing a multicast message comprises receiving the multicast message, determining if a multicast group destination for the multicast message is in a multicast forwarding table (MFT), determining if the multicast message has been previously forwarded and forwarding the multicast message if the message was not previously forwarded and the multicast group destination is in the MFT.

Abstract: A set of certificate management methods designed to significantly reduce or eliminate reliance on infrastructure network connectivity after vehicles are sold uses techniques to support certificate management operations in order to reduce the frequency which vehicles need to communicate with the Certificate Authorities (CAs) and the amount of data that needs to be exchanged between vehicles and the CA. These methods include, for example, approaches to use one-way communications and vehicle-to-vehicle (V2V) communications to replace expired certificates, approaches to use one-way communications and V2V communications to replace revoked certificates, and use of a small subset of vehicles as proxies to help retrieve and distribute Certificate Revocation Lists (CRLs) and replacement certificates. The combination of these techniques leads to solutions that can eliminate the need for roadside infrastructure networks completely.

Abstract: A media-independent handover (MIH) environment supports a MIH function that uses a mapping table to communicate with other MIH functions using a MIH transport protocol. The MIH function updates the mapping table upon receipt of a message having fields to invoke an operation. The operation can update an existing mapping or delete a mapping. The operation also can update a lifetime value for a mapping for a particular address. The mapping table includes mappings. A mapping includes a MIH function identifier, a list of transport addresses, and a lifetime value.

Abstract: A system for proactively authenticating includes a server having media independent access functions including media independent authentication functions that authenticates other entities attached via an interface to an end of a link specific to a media. A plurality of heterogeneous networks each having media specific access functions including authentication functions corresponding to the other entities attached via the interface to the end of the link specific to the media and mobile devices connected to the plurality of heterogeneous networks, and the server having predefined media independent handover protocols and media independent handover identities based on the media independent functions related to handover, in which the server authenticates candidate access networks prior to the handover of the mobile devices from serving access networks to the candidate access networks each of which belonging to the plurality of heterogeneous access networks having the link specific to the media.

Abstract: Avoiding vehicle collisions using an in-vehicle device is provided. The method comprises receiving a connection request from an in-vehicle device within a moving vehicle when the moving vehicle is within a selected distance from a traffic intersection, establishing connection with the in-vehicle device within a moving vehicle via a serving base station, receiving position information from the in-vehicle device within a moving vehicle corresponding to a position of the moving vehicle, receiving control information for a traffic light at the traffic intersection from a traffic management center and relaying the control information for the traffic light to the in-vehicle device within a moving vehicle. A warning is issued based upon a vehicle speed, a location and a position relative to a traffic intersection. A warning is also issued based upon multiple vehicles speed, relative locations to each other and each position relative to a traffic intersection.

Abstract: A critical date management system includes a critical date management module (CDM), project management system, and flow management system in which the CDM dynamically and automatically links activities and tasks in an overall project. Once a project plan is submitted to the CDM, the individual tasks are dynamically assembled together along with all dependencies and temporal data to create a complete end-to-end process flow containing all of the interdependent tasks. The assembled flow is then submitted to the flow management system for execution. The modular approach allows for the dynamic creation of a complete end-to-end delivery flow for different projects and project changes without the need for complex contingency logic. The result is a service delivery process that is customized for each new project. Additionally, when changes are made to an active project plan, manual recalculating of coordinated activities will be performed by the critical date management system.

Abstract: A system and method for controlling an optical filter is provided. The system and method includes dithering a delay of an optical path within an optical filter unit cell, measuring a position of a filter zero, measuring a position of a filter pole, or measuring positions of both a filter zero and a filter pole by observing an output of the unit cell when the delay is dithered, and using the measurement as feedback for maintaining the position of the filter zero at a desired position, maintaining the position of the filter pole at a desired position, or maintaining the positions of both the filter zero and the filter pole at desired positions.