145 results about "Universal Time" patented technology

Method and apparatus for providing authenticated, secure, on-line communication between remote locations including a user terminal adapted to enable a player in one location to remotely communicate via a communications medium such as the Internet with a gaming host in another location. Location of the remote user terminal, the host server and universal time are determined using means for accessing signals generated by geostationary navigational transmitters, such as in the global positioning satellite (GPS) system. Player authentication (identity verification) is determined by use of a personal identification number (PIN) and an electronic signature verification service. Security of communication is accomplished through use of a public-key/private-key encryption system. The remote user terminal may be comprised of one or more discreet components adapted to be used with a laptop or desktop personal computer (PC), or may be embodied in a stand alone or self-contained single unit that is portable and communicates via radio waves, telephone lines or the Internet to a host server.

The present invention is directed to a system, method and computer program for enabling a user (100) (an auditor or a viewer) to access complementary information related to one or a plurality of sequences or topics of interest (102) in a recorded program (103) previously broadcast on the radio or television and played back on a device, such as an audio or video tape or disk recorder/player (104). The preferred embodiment of the invention relates to a system and method for enabling a person (100) listening to or watching a recorded program (103), to select one or a plurality of topics (101) (102) drawing his or her attention and for immediately receiving further information related to these topics from the World Wide Web. The system is based on the synchronization of local times (204) (205) of transmitters (201) and recorders (203). The flow of information transmitted, received and recorded is always synchronized, independently of the relative positions of recorders and transmitters. The synchronization is done referring to an absolute or universal time such as the Global Positioning System Time (GPS-time), the Global Orbiting Navigational Satellite System (GLONASS) time or another suitable universal time based on a satellite system. The GPS or GLONASS receivers are integrated or connected to the broadcasting stations. At the receiver side, GPS or GLONASS receivers may be integrated or connected to the audio or video recorders. The system is also based on a plurality of hyperlinks defined during the production and recording of the broadcast program, for given sequences corresponding to particular intervals of time synchronized with the universal (absolute) time. The hyperlinks are associated wit the information that is broadcast in the program. They can be selected by users during the playback of the recorded program during predefined intervals of time and activated to access additional information and services.

The invention discloses a satellite time synchronization system. The satellite time synchronization system comprises a time sending part, a time transmitting part and a time receiving part, wherein the time sending part generates accurate universal time coordinated (UTC) time by receiving a global navigation satellite system (GNSS) navigation signal, and sending out a pulse per second corresponding to a UTC whole second moment; the time transmitting part transmits the pulse per second and UTC whole second moment information corresponding to the pulse per second to the time receiving part; the time receiving part receives the pulse per second and the UTC whole second moment information corresponding to the pulse per second, pulse per second serves as a trigger point, and a local clock counts to obtain accurate current time. By adopting a high-precision satellite time synchronization system provided by the invention, each piece of measurement equipment for the satellite can work on the same time reference; measured data can be accurately matched according to the time information when processed on the ground; and the measurement precision of remote sensing data or scientific detection data is improved.

A method of determining the latency of a route in a packet-switched network, a packet switch for use in such a method and network and a packet-switched network are disclosed. Preferably, each switch maintains a routing table that records the latency of the routes accessible by that switch. Each switch also preferably has a GPS-based universal time clock which it employs to time the transmission and arrival of identifiable timing packets, these times being used to compute route latency and to up-date the routing tables. In one example (<cross-reference target="DRAWINGS">FIG. 1</CROSS-REFERENCE>) a packet-switched network has a plurality of switches (S1-S6) interconnected by links or trunks (T1-T7). A local GPS-base clock (GPS CLK) is connected to each switch (S1-S6) to enable the accurate timing of transmission and reception of identifiable timing packets in accordance with a system-wide universal timing standard.

The invention provides a precise time synchronization method for an industrial wireless network, relating to the industrial wireless network communication technology. Aiming at the characteristics of the industrial wireless network, such as limited energy supply, dynamic and variable network environment, the openness of the wireless network media, and the like, the invention provides a unique precise time synchronization method, wherein, a layering and grading synchronization strategy is adopted to divide the industrial wireless network according to a hierarchical structure; an MAC layer of a parent device generates beacon frames, sends the beacon frames periodically, obtains a time stamp in the processes of sending and receiving beacon frames, obtains the frequency deviation and time deviation of the equipment clock and the universal time clock by fitting the time stamps sent and received in most recently N times, compensates the local clock, realizes the time clock synchronization of a child device and the parent device; time synchronization is carried out in a grade-wise manner and finally the time synchronization of the whole network is realized. On the premise of meeting the performance requirements on the industrial wireless network, the precise time synchronization method of the invention can ensure that the whole network runs within a uniform time scale and guarantee the normal operation of the system.

The invention is a hardware synchronizing method for position and orientation system (POS), relating to a method for synchronizing various sensor data in the POS, firstly using GPS receiver-outputted GPS second pulse signal accurately synchronous with UTC time (Coordinate Universal Time) to synchronize the system time of the POS with the UTC time, then generating UTC time-containing hardware synchronous pulse through system timer and collecting various sensor data, and then implementing synchronization of various sensor data in the POS. And the invention uses GPS second pulse to real-timely correct system clock drift and implements GPS signal monitoring and thus has features of high synchronizing accuracy, good adaptability and high reliability.

A appliance (100) having a receiver (324) capable of receiving and a decoder (314) capable of decoding a time signal (400) into a time value. A clock (308) in the appliance (100) is updated or set with the received time value and an indicator (104) is activated to notify consumers that time synchronization to a time signal has occurred. The decoder (314) from the decoded time signal (400) is able to identify leap years and changes to and from daylight savings time.

The invention discloses a multi-redundant synchronous data acquiring device and method of a non-cable seismograph. The method is a multi-redundant synchronous data acquiring method of a non-cable seismograph based on a UTC (universal time coordinated) time system, and comprises the following steps: through introducing a local auxiliary UTC time service system and combining a GNSS (global navigation satellite system) time service technology, constructing a multi-redundant TUC time service system so as to guarantee that a non-cable seismograph acquiring station can synchronize the data acquisition under the condition of loading a GNSS time service signal; before acquiring the seismic data, firstly timing the local UTC, selecting one of continuous record or UTC time interval or UTC time point to set a synchronous acquiring task so as to generate a synchronous data acquiring task list; and marking the UTC time scale information on the acquired seismic data according to the UTC time service information, storing in a local memory, and finally obtaining a complete synchronous single shot record. The synchronous seismic data can be acquired by the non-cable seismograph acquiring station under any severe satellite signal condition by using the acquiring device and the acquiring method; and the synchronous precision is superior to 4 microseconds, and the synchronous requirement of resource exploration is completed satisfied.

A time synchronization system comprises a GPS (Global Positioning System) receiver for receiving a time signal from a Global Positioning System (GPS), and outputting a UTC (Universal Time Coordinated) synchronization reference signal synchronizing with UTC and a UTC synchronization absolute time signal, and a time signal distributor for generating a reference time signal synchronizing with UTC from the synchronization reference signal and the absolute time signal, and transmits this reference time signal in distribution to a plurality of distributed control oriented terminal devices. The time synchronization between the plurality of distributed control oriented terminal devices can be thereby taken.

The invention provides an SOPC (System on a Programmable Chip) networking based sub-microsecond level clock synchronizing method. The clock synchronizing method comprises the steps of synchronizing UTC (Universal Time Coordinated) of a remote reference primary parent clock with UTC from an external GPS (Global Positioning System) clock or a Big Dipper system clock; synchronizing each node of a local first-level PTP (Precision Time Protocol) domain with the remote reference primary parent clock through a network switching device which supports a transparent clock function; receiving an optimal primary clock from a network at the same level by each Zynq platform based slave clock which supports IEEE158V2 protocol and gigabit Ethernet for time synchronization and frequency synchronization; when a PTP domain at the next level synchronizes with the primary parent clock through a border clock, performing clock synchronization by a primary clock at the upper level; and during the period that the PTP domain at the same level masters an independent clock synchronization control right, selecting the optimal primary clock as the primary clock of the network at the same level through an optimal primary clock algorithm. The invention also provides an SOPC networking based sub-microsecond level clock synchronizing system which adopts the clock synchronizing method.

The present invention is directed to a system, method or computer program, for enabling a radio auditor or a television viewer (100) to access complementary information (101) related to a broadcast program (102) received in real-time (or to a recorded program previously broadcast and played back on an audio or video player/recorder). The preferred embodiment of the invention relates to a system and method for enabling a person (100) receiving a broadcast program (102), (or listening or watching a recorded program), to select a plurality of topics or sequences drawing his or her attention (101, 103) and for immediately, or later on, accessing additional information related to these topics or sequences from the Word Wide Web. The system is based on a synchronization of the local times of receivers (or recorders) and transmitters according to a same universal-time (201, 202), so that the flow of information transmitted and received (or recorded) is always synchronized, independently of the relative positions of receivers (or recorders) and transmitters. The synchronization is done referring to an universal time such as the Global Positioning System Time (GPS-time), the Global Orbiting Navigational Satellite System (GLONASS) time or another suitable universal time based on a satellite system. The GPS or GLONASS receivers are connected or integrated to the broadcasting stations. At the receiver side, GPS or GLONASS receivers may be integrated or connected to user devices e.g., Personal Computers, wearable computers, Personal Digital Assistants (PDAs), smart phones or onboard mobile computers (or to the audio or video recorders) that may be independent or separate from the radio or television receivers. The system is also based on a plurality of hyperlinks defined for given time intervals during the production of the broadcast program. These time intervals are synchronized with the universal Time. The hyperlinks are associated with the transmitted (and recorded) information. The hyperlinks can be retrieved, selected and activated by radio auditors or television viewers during the time intervals for which they have been defined, during the broadcast of the program (or during its playback).

The present invention is directed to a system and method for enabling a radio auditor or a television viewer (100) to access complementary information (101) related to a broadcast program (102) received in real-time. The preferred embodiment of the invention relates to a system and method for enabling a person (100) receiving a broadcast program (102), to select a plurality of topics drawing his or her attention (101) (103) and for immediately, or at a later time, accessing additional information related to these topics from the Word Wide Web. The system is based on a synchronization of the local times of receivers and transmitters according to a same universal-time (201) (202), so that the flow of information transmitted and received is always synchronized, independently of the relative positions of receivers and transmitters. The synchronization is done referring to an universal time such as the Global Positioning System Time (GPS-time), the Global Orbiting Navigational Satellite System (GLONASS) time or another suitable universal time based on a satellite system. The GPS or GLONASS receivers are connected or integrated to the broadcasting stations. At the receiver side, GPS or GLONASS receivers may be integrated or connected to devices (e.g., Personal Computers, wearable computers, Personal Digital Assistants (PDAs), smart phones or onboard mobile computers) that may be independent or separate from the radio or television receivers. The system is also based on a plurality of hyperlinks defined for given universal-time intervals of retransmission. The hyperlinks are associated with the transmitted information. The hyperlinks can be retrieved, selected and activated by radio auditors or television viewers during the time intervals for which they have been defined.

The invention relates to the calibration of a satellite clock, and discloses a calibration system for a satellite clock and a calibration method of the system. The calibration system comprises a satellite clock source, a satellite measuring and controlling system, a satellite load system, a ground measuring and controlling station, a ground application station and a clock error fitting server. The calibration method comprises the following steps: 1) compiling a satellite program control operation sheet and loading to a satellite; 2) executing program control operation; 3) generating load data; 4) downloading load data; 5) analyzing the load data to calculate current UTC (Coordinated Universal Time); and 6) carrying out clock data fitting, and giving a corresponding relation between satellite time and the UTC. According to the calibration system for a satellite clock and the calibration method, the current problem that only satellite clock source precision is blindly improved to cause the complicated design of the satellite clock system and a control system, but the improvement effect of the practical working precision is not obvious can be solved. The working precision of the satellite is economically and reliably improved with a large-system closed loop feedback method.

The invention relates to a method for correcting a clock of automatic ship identifying terminal equipment. The method comprises the following steps that: a clock correcting module acquires a UTC (universal time coordinated) time through a GPS (global position system) module and calculates errors of a local time through the UTC time; the error of a local clock is calculated after the errors are accumulated for a period; three levels of clock adjusting parameters are calculated through the errors; a clock compensating module compensates the local time according to the three levels of clock adjusting parameters so as to control the error of the local clock within a relatively small range, then the purpose of clock correction is achieved. By utilizing the method, AIS (automatic identification system) ship automatic identification terminal equipment can correct the error caused by the inaccuracy of the local clock, ensure that the synchronous error between the local time and the UTC time is not larger than 0.1 time slot (2.6ms) within half an hour under the condition that the UTC time reference is lost, and ensure that the AIS time synchronization in broadcast messages is still met. Therefore, the problem that the message transmission of other equipment is influenced when the AIS ship automatic identifying terminal equipment transmits a message due to the fact that the equipment time is not synchronous with the UTC time is solved.

The invention discloses an automatic time-tick synchronization system of intelligent electronic equipment of a transformer substation in the technical filed of automatic time-tick of intelligent electronic equipment of a transformer substation in the power sector. The automatic time-tick synchronization system comprises a time-tick server and a time-tick terminal installed on the intelligent electronic equipment of the transformer substation. The time-tick server comprises a UTC (Universal Time Coordinated) acquisition unit, a central processing unit supporting an IEEE1588 protocol and a network interface supporting IEEE1588 protocol communication; the time-tick terminal comprises a protection unit based on IEC61850 modeling, a central processing unit supporting the IEEE1588 protocol and a network interface supporting IEEE1588 protocol communication; and the time-tick server and the time terminal are connected by the network interfaces supporting IEEE1588 protocol communication. The invention avoids the problems of complicated network structure and overhigh cost of the traditional time-tick system and improves the accuracy of clock synchronization.

The invention relates to a clock source device based on a GPS (global positioning system) and a constant-temperature crystal oscillator and a synchronous control method. The clock source device comprises a constant-temperature crystal oscillator module, a master control module, a GPS module, a narrowing circuit module and an auxiliary control module and the like, wherein the constant-temperature crystal oscillator module is connected with the auxiliary control module, the GPS module receives satellite pulse-per-second signals, the auxiliary control module resets a fractional-frequency submodule therein at the regular time according to the satellite pulse-per-second signals and eliminates accumulated errors of the constant-temperature crystal oscillator. The synchronous control method includes calibrating crystal oscillator phase voltage; receiving satellite signals by the GPS module; inputting selected frequency signals to the main control module through a key module; sending the GPS pulse-per-second signals which are subjected to narrowing treatment into the auxiliary control module; sending clock frequency signals of the constant-temperature crystal oscillator module into the auxiliary control module; resetting the fractional-frequency submodule by the auxiliary control module at the regular time according to GPS signals; and selecting signal output frequency signals according to frequency. The frequency signals and UTC (universal time coordinated) are synchronous by the aid of the GPS combined with the constant-temperature crystal oscillator, and the phase error is smaller than 100ns.

A method of associating a universal time with time of arrival information of an identified component of a signal at a terminal of a radio positioning system is disclosed. In the method a marker signal with an associated universal time tag is obtained from a timing device (or the marker signal is obtained from an independent oscillator and a universal time tag assigned to the marker signal), and the time or phase relationship between the marker signal (or between the time of arrival information of said identified component respectively) and the oscillator is measured. The time of arrival information of said identified component relative to the oscillator is determined and the universal time corresponding to the time of arrival information of said identified component is calculated from said universal time tag and said measured time or phase relationship, before the calculated universal time is associated with said time of arrival information.

The invention discloses a multiple star image and attitude associated star sensor internal parameter calibration method and a device thereof. A GPS antenna 3, a gyroscope unit 1 and a to-be-calibrated star sensor 2 communicate with a GPS receiver 4 respectively, and a data processing computer 5 is connected with the gyroscope unit 1 and the to-be-calibrated star sensor 2 respectively; synchronous data acquisition of the gyroscope unit 1 and the star sensor 2 is realized by virtue of UTC (universal time coordinated) time information acquired by the GPS receiver 5, and calibration algorithm solution of the to-be-calibrated star sensor 2 is completed in the data processing computer 5. According to the method, the gyroscope unit is used for providing accurate rotating angle information to implement splicing association of a plurality of frames of star images, thereby increasing observed data samples for internal parameter calibration of the star sensor; the method can be used for calibration under a dynamic condition, no strict requirements are made to the motion state of the to-be-calibrated star sensor 2, the calibration accuracy and reliability are improved, a calibration flow is simplified, dynamic calibration of the to-be-calibrated star sensor 2 can be conveniently implemented, and the method and the device are also applied to calibration of an inertial/celestial combined navigation system.

The invention discloses an electronic resume recording device of an unmanned aerial vehicle, which comprises a main control chip, a flight data receiving interface, a clock circuit, a storage unit and a power management chip, wherein the main control chip reads flight data frames through the flight data receiving interface, and extracts a status bit and UTC (universal time coordinated) time in the flight data frames; the flight data frames are added with time stamps output by the clock circuit and output to the flight data region in the storage unit; the status bit is output to the resume use region of the storage unit; the UTC time is output to the clock circuit to carry out time correction on the clock circuit; the status bit is used for identifying the flight operation condition of the unmanned aerial vehicle; and the main control chip periodically queries the power supplying state of the power management chip and outputs the power supplying state to the resume use region of the storage unit. The electronic records such as device working conditions, storage environment, mounted equipment configuration information, flight and task data of the unmanned aerial vehicle are recorded.

The invention relates to a distributed relay selection method, wherein a relay node participating in cooperative transmission is selected at least from one relay node, and a selection flow comprises the steps that: each relay node respectively estimates the channel state information of a forward link and a backward link of per se; each relay node calculates per se channel quality according to thechannel state information and compares the channel quality obtained from the calculation with a judging threshold; when the channel quality is larger than the threshold value, the relay node is confirmed to participate in the cooperative transmission and sets the timing internal of a per se timer to be a universal time value, wherein the universal time value is smaller than a preset time value; or else, the relay node is confirmed not to participate in the cooperative transmission and sets the timing interval of the per se timer to be a time value larger than the preset time value. The invention also relates to a relay selection device. The invention is suitable for the relay selection in a multi-relay wireless cooperative transmission network, and through distributed selection means, theinvention can effectively reduce the complexity in the process of the relay selection while not lowering the system performance, thereby improving the integral system performance.

The invention discloses a simulation method for super speed aircraft conformal sub-grid electromagnetic scattering characteristic analysis. The simulation method includes the following steps: performing aerothermodynamics simulation according to an aerodynamic configuration, the flight speed and the flight height of an aircraft, and determining the plasma collision frequency and the plasma oscillation frequency of all parts through simulation information; performing subdivision on an aircraft model and a plasma sheath through a tetrahedron to obtain structure information of the aircraft model; mapping flow field point information to ridges of a finite difference time domain computing grid, and determining a zone with a relative dielectric constant more than 6 according to the collision frequency and the oscillation frequency on the ridges to perform sub-grid processing; processing junctions between the ridges of the finite difference time domain computing grid and a metal surface through a finite difference universal time domain method; and computing the plasma zone through an iterative formula of plasma to finally determine the radar cross section of the super speed aircraft. The simulation method has good adaptability and high computational efficiency.