Agilent Technologies, Inc.

Hewlett-packard Company

John C. Eidson

John C Eidson

Jogesh Warrior

Bruce Hamilton

Stanley P Woods

Hans J Sitte

Glenn R Engel

Joseph Alexander Dara-Abrams

Valery Kanevsky

Jeff Burch

Douglas Michael Baney

Jerry J Liu

Miao Zhu

Robert Thomas Cutler

Leonard S Cutler

Jay M Wardle

Parvathi Chundi

Robin P Giffard

Mutsuya Ii

James L Johnson

Wesley D Cole

Clark Nicholson

Gerald Weibel

Dennis O'Brien

Ronald Van Der Meulen

Hans Sitte

Keith Edward Moore

A method of executing an action at a predetermined time by a device is disclosed. The device has a latency time between initiation of the execution of the action and the actual execution of the action. The method includes advancing the initiation of the execution of the action by the latency time. A device in which the method is implemented and a system including the device are also disclosed.

Method, a device and a system for executing an action at a predetermined time

Representative embodiments are directed to distributed sensor systems from which measurement data is extracted using mobile devices. Representative embodiments record access attempts by the mobile devices and calculate the probabilities of future access by a mobile device to sensor devices using the recorded information. Collection points are selected in response to the probabilities of future access. Additionally, memory management and data prioritization may occur that is at least partially dependent upon the probabilities of future access.

Method for cluster head selection in networks accessed by mobile devices

An instrument including a device, a transducer and a calibration module is disclosed. The device produces a reference time and/or a reference frequency. The transducer converts the reference time and/or the reference frequency to a reference signal. The calibration module adjusts an output signal generated by the instrument and/or a result of a measurement taken by the instrument, based on the reference signal. A system including the instrument and a method of calibrating the instrument are also disclosed.

Method of calibrating an instrument, a self-calibrating instrument and a system including the instrument

A timing bridge device is used to gain boundary and transparent clock functionality using conventional network components on those network links that require good timing distribution. This timing path is invisible to the network component. The timing bridge device has an internal time clock and timestamps a received message according to the internal time clock when the message is received by a network device and when the message leaves the network device. The time associated with the message is then adjusted based on a determined transit delay.

Timing bridge device

Test instruments constituting an automatic test system are characterized in terms of execution time data. The execution time data is composed of a set of execution times. Each of the execution times is the time required for the test instrument to perform a respective testing operation. The test instruments additionally have the ability to communicate their respective execution time data to such recipients as others of the test instruments, the system controller and recipients outside the automatic test system. Additionally, such test instruments have the ability to communicate test results to at least one other of the test instruments and the ability to process test results received from at least one other of the test instruments. Such characterization, communication and processing allows a system integrator to devise execution time-dependent test programs as part of a test suite that allows test throughput to be maximized.

Test instrument and system responsive to execution time data

A network of RF devices is connected to a central processing device and a common network clock. The central processing device and the RF devices exchange timing information in order to synchronize the network of RF devices to a common time defined by the common network clock.

Method and system for synchronizing a network of RF devices

A signal monitor device that detects a signal propagating on a signal line and that generates a timestamp when the signal is detected. The timestamp may be used in a variety of applications including measuring the propagation delays on signal lines and determining the timing in a system.

Timestamping signal monitor device

Techniques for correcting time synchronization inaccuracy caused by asymmetric delays on a communication link. Time synchronization according to the present techniques includes determining an asymmetry in a propagation delay on a communication link used by a first device and a second device to exchange timing information and incorporating the asymmetry into a determination of a clock offset between the first and second devices.

Correcting time synchronization inaccuracy caused by asymmetric delay on a communication link

A method for designing a measurement/control system that enables a system designer to explicitly specify the portions of a measurement/control system that are subject to a set of time constraints and the portions of the measurement/control system that are not directly subject to the set of time constraints. A method according to the present teachings includes determining an HRT/SRT boundary between a hard real-time (HRT) portion of a measurement/control system and a soft real-time (SRT) portion of the measurement/control system and determining a buffer for the HTR/SRT boundary in response to a set of time constraints associated with the HRT portion.

Designing time-based measurement/control system

Disclosed are systems and methods for utilizing a pool of mobile devices in probing operations comprising a probing host system including probe management and data management operative aspects, and a pool of mobile devices, one or more of which are operative under control of the probe management to provide probing data to the data management, wherein the one or more mobile devices comprise mobile devices for which location and movement is not under control of the probing host system.

Systems and methods for measurement and/or control using mobile probes

A distributed system with a timing signal path for increased precision in time synchronization among distributed system clocks. A distributed system according to the present teachings includes a master clock coupled to a timing signal path and a set of slave clocks coupled to the timing signal path. The master clock includes means for generating a timing signal on the timing signal path in response to time events associated with the master clock. The slave clocks include means for adjusting their local time in response to the timing signal received via the timing signal path.

Distributed system time synchronization including a timing signal path

A system and method are provided that use mobile collectors for accessing a wireless sensor network. In certain embodiments, one or more mobile collectors having mobility that is unpredictable to a wireless sensor network are deployed for use in accessing the wireless sensor network. Thus, rather than relying on an access technique having certainty designed therein with regard to the access of a wireless sensor network, certain embodiments utilize an access technique that relies on statistical probability for accessing the wireless sensor network. For instance, by deploying a plurality of mobile collectors that are operable for accessing a wireless sensor network, a statistical probability exists that at some point (or at various points in time) at least one of the mobile collectors will travel within range of the wireless sensor network to enable access thereof.

System and method for using mobile collectors for accessing a wireless sensor network

Embodiments of the present invention reconstruct an underlying phenomenon without the need for predicting a functional form for that signal, by establishing an upper bound and a lower bound for the value of the phenomenon at every point within a measurement space. By acquiring a large enough number of measurements of the phenomenon, a sufficiently high probability that the value of said phenomenon lies between said upper and said lower bound at every point within said measurement space may be established.

Confidence blanket for randomly-located measurements

A motion control system having a set of control nodes each of which controls motion along a single axis of the motion control system and which coordinate their collective motions using time synchronization technology. Each control node corresponds to an axis of the motion control system and each control node includes a synchronized clock and participates in a protocol for synchronizing the synchronized clocks. The application of a series of control values to each axis in the motion control system is coordinated using the synchronized clocks.

Motion control using time synchronization

One embodiment of the present invention separates the region of measurement space into a plurality of sub-regions and calculates a confidence, for reconstruction of an underlying signal within said space, corresponding to each of the sub-regions. This embodiment can then accept measurements from mobile measuring devices within said measurement space and store those measurements if they originate from devices in sub-regions having a confidence below an acceptable value.

Growing community of inventors

Palo Alto, CA, United States of America

John C Eidson