KR101099175B1 - Transfer of calibrated time information in a mobile terminal - Google Patents

Abstract

A system and method are disclosed for calibrating uncorrected visual information in a mobile terminal (101). The terminal includes a receiver 203 capable of receiving a signal from which calibration time information carried by a calibrated system (satellite positioning system) can be extracted, and a calibration carried by an uncalibrated system (cellular communication system). And a receiver 200 capable of receiving a signal from which visual information may not be extracted. The time offset between the calibration time information extracted from the calibrated system and the uncalibration time information extracted from the uncalibrated stability system is such that a signal from the uncalibrated stability system is available and the uncalibrated stability The travel time of the signal from the system is known or determined and, if the signal from the calibrated system is utilized, is determined at the first terminal location. The uncalibrated visual information extracted from the signal of the uncalibrated stable system received at the second terminal location is a determined time offset and a known or determined movement of the signal from the uncalibrated stable system at the second terminal location. Is calculated from time.

Description

TRANSFER TIME CALIBRATION TIME INFORMATION IN A MOBILE TERMINAL}

Although the present invention is in a situation where a primary calibrated clock cannot be used, it is required to provide accurate time information in the case where a second clock previously calibrated from the primary clock can be used. It is about a system.

More specifically, the present invention relates to the delivery of visual information in a mobile terminal using a positioning system based on a signal received from a transmission source. Of particular interest are mobile terminals that use radio signals received from satellite positioning systems such as terrestrial wireless networks and global positioning systems (GPS).

The technique of locating a mobile wireless terminal using signals received from one or more transmitters has been widely used for many years. Such systems include receivers as well as methods using general purpose wireless networks such as cellular mobile telephone networks (eg WO-A-97-11384) and wireless transmitter networks (eg EP-A-0303371). Satellite networks (e.g., GPS and Galileo) arranged for specific purposes to locate the terrestrial network (e.g., Loran) of the transmitter.

Within the cellular mobile telephone network, for example, the location of the terminal may be determined by the time delay between the serving transmitter and the terminal, the strength of the signal received from the serving transmitter and neighbor transmitters, the incident of the received signals. It may be based on the identity of the serving cell, augmented by information such as angle. The improved location may be obtained using Observed Time Difference of Arrival (OTDA) of signals received at the terminal from two or more sources.

The OTDA method provides good location accuracy using only the signals available within the cellular wireless network. However, in order to solve the positioning equation, we need the exact transmission time offset between transmitters to be determined. This may be performed using a location measuring unit (hereinafter referred to as 'LMU') having an additional receiver. LMUs are placed at known locations so that their OTDA measurements can be converted directly into a network timing model (see, for example, WO-A-00-73813).

Alternatively, measurement of signals from numerous geographically separated transmitters of known location, for example performed by two terminals geographically away from an unknown location, can be performed without the need of an LMU. A technique (see WO-A-00-73814) that can be used to calculate both all timing offsets between transmitters and the location of the terminals can be used.

Satellite positioning systems such as GPS provide an accurate solution if the receiver can receive enough satellite signals. The satellite signals relate to a common time-base of globally defined standard time, eg, GPS time or Universal Coordinated Time (UTC). For example, within GPS, each satellite in the flock has a stable atomic clock that is constantly compared and measured with one reference clock located on the ground. The time of each satellite clock is advanced for alignment with the derived three parameter model representing the difference in time between the reference clock and the two clocks. The three (3) parameters are carried on the satellite and propagated by the satellite as clock correction parameters. This has the effect of aligning the satellite clock closer to the ground-based reference clock after correction based on the parameter. The satellite positioning system works well when the antenna of the receiver has a clear view towards the sky and does not work smoothly or does not work at all when inside the building or when the view towards the sky is not clear. Another problem is that it takes a long time to achieve a "first fix" from a cold start, and therefore works best when constantly tracking the satellite signal.

In an attempt to overcome these problems, various proposals have been made to assist satellite positioning systems. For example, US-A-5,663,735 discloses providing an additional radio signal to an additional receiver in a GPS terminal, where the radio signal has a standard time or frequency and resolves the GPS time for the arrival time of the data bit. To use the standard time or frequency. In another example (WO-A-99-47943), the mobile cellular telephone network is adapted to receive a GPS signal at a base transceiver station (hereinafter referred to as 'BTS'), allowing to calculate the position of the mobile telephone.

In another refinement (US-A-2002-0168988), the GPS unit has a position determining system (hereinafter referred to as 'PDE'), which includes a reference signal receiver, which is usually part of a mobile communication system. A portion of the reference signal received by the reference signal receiver is transmitted to the PDE to provide additional timing data that can be used to assist in the operation of the P s.

Transmission of auxiliary data over a link has been known in the art for many years. One of the earliest examples was provided in 1986. The White Sands Missile Range Interface Control Document is a two-way communication that allows the transmission of calculated positions or pseudo-ranges, sometimes based on geodetic coordinate reference frames defined in the WGS84 form. Location reporting via link was initiated. In 1986, ICD GPS 150, issued by the US government to potential bidders for the Range Application Joint program, incorporated support for mobile GPS receivers, in particular through the transmission of astronomical, almanac and visual information. The practical use of this data format to support mobile GPS receivers with bidirectional data links has been performed since 1986.

Providing auxiliary data to the satellite positioning system receiver can improve its performance. Moreover, accurate timing assistance reduces the complexity of the associated chipset. The ancillary data may include some or all of the three components of a) satellite information, b) time aiding, and c) a predicted value of the receiver location.

In order to obtain satellite information, it is known in the art how satellite information is provided by a server connected to one or more reference signal receivers which continuously monitor the satellite signal. In a GPS system, the information can also be obtained directly from the satellite signal by the GPS receiver whenever a satellite signal can be received. Time aiding can be obtained from a network signal whose timing has previously been associated with the satellite time base by the network based equipment. The predicted value of the receiver location can be obtained using a network positioning method such as based on OTDA. In all cases in the art, the assistance data is sent to the GPS receiver using the data channel provided by the mobile cellular network.

In Applicants' WO-A-00-73813 and WO-A-00-73814 (incorporated herein by reference), a communication method and system for establishing and maintaining a timing model defining timing relationships between transmitters in a cellular wireless network is disclosed. Describe. The system also calculates the position of the receiver. By linking the timing of signals from one or more transmitters of such a system to the GPS time base, the network timing model estimates the timing of signals transmitted by any transmitter in the network relative to the GPS time base, It can be used to provide timing assistance information to a GPS receiver. The position prediction value may also be provided to the GPS receiver.

Other references that describe auxiliary systems are described in US-A-6,429,815, US-A-2002-0075942, US-A-2002-0068997, US-A-2002-0123352, WO-A-02-091630 and WO. -A-01-33302.

In US6445927, filed by King et al., The position of a base station in a communication network is calculated using measurement by the mobile terminal of the arrival time of a communication signal from a base station with respect to GPS position information obtained from a GPS set provided in the terminal. The method of making is described. An important feature is that the terminal must be located within the minimum of three (3) geographically separated locations before a solution can be found. The invention does not relate to the location of the base station but rather the information provided by the method.

In US6603978, filed by Carrison et al., An apparatus and method for providing visual information assistance to a GPS receiver located in a mobile terminal via a wireless communication signal during an active cell session when traffic and control channels are not necessarily synchronized. It is provided. Unlike the present invention, this is achieved using a GPS receiver connected to the LMU and a base station in the network, with the time offset being sent to the mobile terminal via the communication channel.

In a patent application published by Younis in US2002 / 0168988 A1, a reference signal (e.g., a public broadcast signal) received at both one or more receivers and terminals in a network is used as a GPS set in a mobile terminal. Timing assistance is provided. When the time offset for the reference signal is determined, the terminal sends a snippet of the received reference signal to a network-based computing node with a request for GPS aiding information. The time offset is sent back to the terminal using the information to obtain a GPS signal. As noted above, the invention does not calculate any GPS time offsets in the network, nor does it transmit such information over a communication link.

Moreover, the invention does not transmit fragments of reference signals over a communication link.

Thus, in conclusion, current systems for locating mobile receivers using satellite positioning techniques are based on timing of other signals, such as signals received from a serving base station (the 'downlink') of a cellular mobile wireless network. It is known that improvements can be made if the correct time aiding is provided on the basis. The time aid is used by the satellite positioning receiver to reduce the range of time offsets that must be searched to detect a given satellite signal. The generation of accurate time assistance requires a time relationship between the satellite signal (satellite time reference) of the satellite positioning system and the downlink signal of the cellular network to be known. The timing can be linked and measured together using a network-based system as described in Applicants' WO-A-00-73813 and WO-A-00-73814 or an LMU mounted at a known fixed location. Can be. One or more GPS LMUs in the network may be used to find the offset between the network timing and the GPS time base. In such a case, time assistance is, after all, only available when the mobile terminal has access to a suitably equipped terrestrial wireless network. Moreover, a significant amount of signaling and messaging is needed within the network and between the network and the mobile terminal.

Calibration time information, that is, time information that is precisely related to the reference time, such as GPS time or UTC, may be used for many purposes. One of those mentioned above is a GPS or other satellite positioning receiver directed towards a signal from a particular satellite by reducing the uncertainty in the time of arrival of the signal and reducing the range of time offsets that the receiver must find in order to detect the signal. To help. Another use of calibration visual information is that two (2) astronomy receivers at either end of the baseline (which can be thousands of kilometers in length) have the same time accuracy (i.e., 5 MHz bandwidth) as the inverse of the receiver bandwidth. In the case where they must be synchronized with each other within about 200 ns) (Very Long Baseline Interferometry, hereinafter 'VLBI').

  The present invention obviates the need for network based equipment to generate signaling / messaging and time assistance information that needs to be supported as identified in the prior art. Improvements in the elimination of time assisted signaling increase the capacity of wireless traffic and represent robust timing assist capability. Here, we show how the functions that allow autonomous determination of the relationship between satellite time base and network timing are integrated into the mobile terminal.

In particular, it should be noted that bidirectional communication between the terminal and the network is not a necessary feature. The system setup according to the present invention can operate using only broadcast signals from the network without the terminal having to register with the network or send any messages.

According to a first aspect of the present invention, an un-calibrated system capable of receiving a signal from which calibrated time information carried by a calibrated system can be extracted and A method for calibrating uncalibrated visual information in a mobile terminal having one or more receivers capable of receiving a signal from which uncalibrated visual information carried by a stable system can be extracted. At a first terminal location where a signal from the system is available and a signal from the calibrated system is available, a first travel time of the signal from the uncalibrated stable system and extracted from the uncalibrated stable system Uncalibrated visual information and calibrated visual information extracted from the calibrated system Determining a time offset between the first terminal within the first terminal; And at a second terminal location where calibrated visual information is not available, determining a second travel time of the signal from the uncalibrated stability system in the terminal and extracting from the signal of the uncalibrated stability system. And correcting the untimed visual information using the first and second travel times and the time offset determined at the first terminal location.

The invention can also receive a signal from which calibration time information carried by a calibrated system can be extracted, and receive a signal from which uncalibrated time information carried by an uncalibrated stable system can be extracted. A system for calibrating uncalibrated visual information in a mobile terminal having one or more receivers, comprising: means for determining a travel time of a signal from the uncalibrated stability system to the terminal; At the first terminal position where the signal from the uncalibrated stability system is available and the signal from the calibrated system is available, uncalibrated visual information extracted from the uncalibrated stability system and the calibrated Time offset determining means for determining a time offset between calibrated time information extracted from the system; And using the travel time of the signal from the uncalibrated stability system determined at the first and second terminal positions and the time offset determined at the first terminal position, extracted from the signal of the uncalibrated stability system. A system with calibration means for calibrating uncalibrated visual information.

Thus, the present invention enables the delivery of calibration time information within the terminal as the terminal moves from one location to another, for example, to assist satellite-based positioning systems.

The visual information transfer may be used for any purpose where calibration time information is required but no basic calibration time reference is available. For example, the calibrated system can be the time base of a satellite positioning system such as GPS, and the signal received by the receiver from the satellites can be used to determine a calibration time, such as UTC. Alternatively, the calibrated system may be a local time reference, for example a quartz-based or atomic clock. The uncalibrated stable system may be a device or system capable of providing visual information that remains valid (stable) for a sufficiently long period of time. For example, signals transmitted by one or more transmitters of a communication network may be used for this purpose, which is a common reference signal propagated from the center point of the network, where the signals typically exhibit good interference characteristics. This is because they are often derived from locked, high performance oscillators. In a specific example, accurate visual information may be needed if the network signal can still be received while the satellite signals are blocked, distorted, or unavailable.

The mobile terminal may operate independently, without assistance sent from the network, i.e. without additional infrastructure located in the terrestrial network or the need for overhead signaling and communication typically required to convey visual information to the mobile terminal. Can be.

Alternatively, the mobile terminal may be assisted by a server connected to the terminal via a communication link. As discussed later, the server may perform the necessary calculations for the extraction of the uncalibrated visual information from the uncalibrated stability system. In this case, it is noted that the message sent over the link carries no calibration time information, and in particular, unlike the prior art, nothing passes from which satellite timebase time or universal time such as UTC can be extracted. shall.

At the first and second terminal locations, the travel time of the signals received from the uncalibrated stable system can be determined when the location of the transmitter and the terminal is known. The transmitter location may be obtained from a database, decoded from one or more of the signals from the uncalibrated stable system, or may be obtained from signals from another transmitter. The location of the terminal in both the first and second positions can be obtained by any convenient means, for example using one of the positioning systems described above.

The round trip travel time of a signal from a serving transmitter is generally known within one terminal of a communication network, which means that the terminal receives a signal from the terminal that is synchronous with the signal sent by the serving base station. In order to receive again, the internal timing must be advanced by the same amount. In some systems, the amount that the terminal must advance its timing is called a Timing Advance (TA) value. In the case where the uncalibrated stable system is the service-providing transmitter, therefore, it may not be necessary to know the location of the terminal in order to perform the calibration of the uncalibrated visual information.

Determination of time offsets is well known in the art and can be performed by any convenient means. For example, the time that elapses between the arrival of a particular time marker in a signal from the calibrated and uncalibrated system can be measured at the clock in the terminal, as described above, in response to a transmission delay between the transmitter and the terminal. Correction is applied.

In some cases, it is advantageous to be able to transfer the calibration time offset from one uncalibrated stability system to another. This may be the case, for example, when a signal from a first network transmitter is not available, but used as a first uncalibrated stable system, but a signal from a second network transmitter may be received.

According to a second aspect of the present invention, an uncalibrated time carried by the first and second uncalibrated stable systems, capable of receiving a signal from which calibration time information carried by the calibrated system can be extracted, A method of calibrating uncalibrated visual information in a mobile terminal having one or more receivers capable of receiving a signal from which information can be extracted, wherein a signal from the first uncalibrated stable system is used. And at a first terminal location where a signal from the calibrated system is available, a first travel time of the signal from the first uncalibrated stabilized system and extracted from the first uncalibrated stabilized system The first time offset between the uncalibrated time information and the calibrated time information extracted from the calibrated system may be determined. Determining in the group; At a second terminal location where signals from the first and second uncalibrated stabilization systems are available, a second travel time of the signal from the first uncalibrated stabilization system and the second uncalibrated A second between the third travel time of the signal from the stabilization system and the uncalibrated visual information extracted from the second uncalibrated stabilized system and the uncalibrated visual information extracted from the first uncalibrated system Determining a time offset within the terminal; And at a third terminal location where calibrated time information from the calibrated system is not available, determining a fourth travel time of the signal from the second uncalibrated stable system in the terminal, and And correcting the uncorrected visual information extracted from the signal of the second uncorrected stable system using the second, third and fourth travel time. A method of calibrating is provided.

The present invention can receive a signal from which calibration time information carried by a calibrated system can be extracted, and uncalibrated time information carried by the first and second uncalibrated stability systems can be extracted. A system for calibrating uncalibrated visual information in a mobile terminal having one or more receivers capable of receiving a signal, the system comprising: means for determining a travel time of a signal from the uncalibrated stability system to the terminal; Uncalibrated extracted from the first uncalibrated stability system at a first terminal location where the signal from the first uncalibrated stability system is available and the signal from the calibrated system is available. Time offset determining means for determining a first time offset between time information and calibrated time information extracted from the calibrated system; The uncalibrated visual information and the second uncalibrated visual information extracted from the first uncalibrated stability system at a second terminal location where the signals from the first and second uncalibrated stability systems are available. Time offset determining means for determining a second time offset between uncorrected visual information extracted from the stable system; And the uncorrected visual information extracted from the signal of the second uncalibrated stable system at a third terminal location, the signal from the uncalibrated stable system received at the first, second and third terminal locations. And calibrating means for calibrating the uncorrected visual information in the mobile terminal, characterized in that it comprises calibration means for calibrating using the travel time and the first and second determined time offsets.

In both aspects of the invention, other receivers may be used in some cases to receive a signal from a calibrated and uncalibrated system. In other cases, integrated multi-purpose receivers may be used. Similarly, the receivers receiving the signal from the two uncalibrated stable system may be the same or may be other receivers. For example, the first uncalibrated stability system may be provided by one or more transmitters of a GSM mobile communication network requiring a first receiver, and the second uncalibrated stability system may be provided. It may be provided by one or more transmitters in other networks, such as wideband CDMA or other systems requiring two receivers. If the same type of network components are used for the two uncalibrated stable systems, for example two GSM transmitters, the same receiver can be used for each, and the transmitters themselves are nevertheless two different. It may be part of a network (eg, a competing carrier) or part of the same network operating in another frequency band (eg, 900 MHz and 1800 MHz in the case of a European dual band GSM network).

When the first uncalibrated system is a transmitter in service of a terminal in a communication network, the TA or Round Trip Travel Time (RTTT) may be known. Thus, it may not necessarily be necessary to know the position of the terminal to measure a first time offset between the calibrated system and the first uncalibrated system. A transmission time offset between the two transmitters if the second uncalibrated system is another transmitter in service (the terminal is moved and the first transmitter is no longer in service). If this is known or can be determined, it is possible to use the TA or RTTT value of the new server without having to know the location of the terminal. This is the case, for example, if a previous calculation performed in accordance with the present invention yields a list of transmission time offsets in the terminal that contain entries for both transmitters.

One or both of the first or second uncalibrated stabilization system may be a watch that runs inside or anywhere in the mobile terminal, used to fix the calibration time for a short period of time. In this case, the stability of the field of view must be sufficient so that the error caused during the fixed period is small so that it does not matter. Also, the second terminal position may be the same as the first terminal position in this case.

As mentioned above, the calibrated system may be a satellite positioning system and the or each uncalibrated stable system may be one or more transmitters of a communication network. Accordingly, the present invention encompasses this particular case, and in particular the use of 'synchronization markers' to provide calibration visual information marks from signals in the communication network.

A method according to the first aspect of the present invention is a method for use in a mobile terminal capable of receiving signals from a source in a satellite and terrestrial network of a satellite positioning system having a time base, wherein the corrected visual information is provided by a synchronization marker. Carried, the method comprising: measuring, at a reserve terminal location, a relative offset in frequency, phase, or time, relative to a first reference, of a signal received by the terminal from a plurality of sources in a terrestrial network; Measuring a relative offset in frequency, phase, or time, relative to a second reference, of a signal received by the terminal from the same source at the first terminal location; Calculating a transmission time offset, relative to a third reference, of signals received by the terminal and transmitted by the source; Constructing the list of relative transmission time offsets; Calculating a first terminal location; And the time offset is determined between the time base of the satellite positioning system and the third criterion, and when the satellite time base time information needs to be determined, at the second terminal location, of the plurality of transmission sources in the terrestrial network. Measuring a relative offset in frequency, phase, or time, relative to the third reference, of the signal received by the terminal from at least three (3), determining the second position of the terminal, and the satellite positioning system Generating a synchronization marker for the satellite positioning system time base using one or more members of a time offset between the time base and the third reference, the second terminal location and a list of transmission time offsets. A method of calibrating uncorrected visual information in a mobile terminal.

It is apparent that a similar set of steps can be performed to generate a synchronization marker for use as calibration visual information according to the second aspect of the present invention.

Accordingly, the method according to the second aspect of the present invention is a method for use in a mobile terminal capable of receiving a signal from a satellite of a satellite positioning system having a time base and from a source in a terrestrial network, wherein the calibration time information is synchronized marker. Carried by the method, the method comprising: measuring, at a reserve terminal location, a relative offset in frequency, phase, or time, relative to a first reference, of a signal received by the terminal from a plurality of sources in a terrestrial network; Measuring, at a first terminal location, a relative offset in frequency, phase, or time, relative to a second reference, of a signal received by the terminal from the same source; Calculating a transmission time offset, relative to a third reference, of a signal received by the terminal and transmitted by the transmission source; Constructing the list of relative transmission time offsets; Calculating the first terminal location;

The time offset is determined between the time base of the satellite positioning system and a third reference,

A frequency, relative to a fourth reference, of a signal received by the terminal from at least one of the other source and the same source in the terrestrial network, at a second terminal location, if the signal from the satellite positioning system is corrupted or unavailable. Measuring a relative offset in phase or time; Calculating a transmission time offset, relative to a fifth reference, of a signal received by the terminal and transmitted by the transmission source; Constructing the list of relative transmission time offsets; Calculating the second terminal location;

The time offset is determined between the fifth criterion and the third criterion,

When satellite timebase time information needs to be determined, at a third terminal location, frequency, phase or time, for the fifth reference, of the signal received by the terminal from at least three (3) of the transmission sources in the terrestrial network Measure a relative offset at, determine a third location of the terminal, the time offset between the satellite positioning system and the third reference, the time offset between the fifth and third references, the first Generating a synchronization marker for the satellite positioning system time base using one or more members of a third terminal location, the second terminal location, and the list of transmission time offsets; A method of correcting visual information that is not present is provided.

The first, second, third, fourth and fifth criteria or any combination thereof may in fact be the same criteria. The reference may be a signal received by the receiver or may be another signal that may be generated locally by, for example, a quartz oscillator. For example, a signal received by the terminal from the serving cell can be used as a reference and the timing of signals received from other cells can be measured with respect to it. Alternatively, an internal watch with suitable stability over a short period of time can be used as a reference.

A location determined anywhere of the terminal location may also be provided to help obtain the satellite signal.

The measurement of the relative offset in frequency, phase or time, relative to a reference, of signals received by the terminal from sources within the terrestrial network may be only the signal broadcast by the network. That is, there is no requirement for the terminal to send a signal to the network. When the network of senders is a communication network, there is no requirement for the terminal to be registered on the network.

The synchronization marker may be implemented by any convenient means and may be provided, for example, as an electrical signal or a clock offset message. It is understood that the synchronization marker can be used to determine the placement of a search window conveniently used in a satellite positioning system such as GPS.

Measuring the relative offset of frequency, phase, or time, relative to a reference, of signals received from the transmission sources may be accomplished using a signal pattern in each of the signals transmitted by each transmission source. As described in WO 00/73813 and WO 00/73814, filed by the Applicant, in this case, when the transmitting sources are members of a communication network, for example a GSM or WCDMA network, the signal patterns are on a control channel. It may be a synchronization burst broadcast or a frame boundary within the transmitted data stream.

The list of relative transmission time offsets is a list of transmission times of these signal patterns, measured in comparison to the third or fifth criterion. What is inherent in constructing the list so is the establishment of a third or fifth criterion for each of the transmission time offsets to be represented. For example, the third criterion may be the time at which a particular signal pattern is transmitted by the selected transmitter, or may be constructed by taking the average of all of the calculated transmission time offsets.

Measurements at the preliminary and first terminal locations are made at distinct first and second times to configure the location and relative transmission time offset of the mobile terminal, but this action is not limited to the use of only two sets of measurements. However, more than one measurement may be used if desired. Indeed, there is often an advantage of averaging the measurements in order to reduce the effects of multipath propagation or noise.

The measurements used to link the satellite time base to the timing of the network signal are made at a third time independent of the first and second measurement times. Since the measurements do not need to occur sequentially, the third time may be equal to the first or second time, or before or after the first and second time or both the first and second time. There is no one-to-one correspondence between the third time and the first or second time, and each can occur whenever needed.

The measurement of the time offset of the timebase of the satellite positioning system with respect to one or more members of the list of transmit time offsets may be made using a time marker in a signal received from a satellite whose time relationship to the satellite timebase is known or determined. Can be achieved. One or more of the signal patterns used to establish the network transmission time offset and the difference in arrival time of the satellite signal time marker may be measured, which are time offsets of the satellite reference and a third reference of the source's list. It can be used to establish

In order to improve the accuracy of the synchronization marker, it is possible to measure the time offset between the third reference of the list of transmission time offsets and the satellite positioning system time axis at another third time, for example by measuring the average It is possible to combine them.

In patent applications WO-A-00-73813 and WO-A-00-73814, to which the present application previously filed, a list of transmission time offsets of signals transmitted by a network transmitter is provided for each signal received by the terminal. It is described if it can be calculated from the timing measurements. Moreover, as described in WO-A-00-73814, these timing measurements can be obtained from one terminal at another time as the terminal moves around the network.

It will be apparent from the foregoing discussion that the present invention can be used to provide time movement within a terminal without any interaction with computational nodes located within the network. However, according to WO-A-00-73813 and WO-A-00-73814 filed by the applicant, the calculation necessary for the calculation of the transmission time offset and position may be too large to be performed in the terminal, for this purpose. As such, there may be an advantage in using a network-based computing node. Another advantage is that the accuracy of the calculation can be improved by using measurements made by other terminals in the network that are not readily available to the terminal.

The mobile terminal is assisted by a server connected to the terminal via a communication link, which performs the necessary calculations for the extraction of the uncalibrated visual information from the uncalibrated stable system, and the signal from the source within the terrestrial network. And a method for use in a mobile terminal capable of receiving signals from satellites of a satellite positioning system with a time base, wherein calibration time information is carried by a synchronization marker, wherein the method, at the first terminal location, Measuring a relative offset in frequency, phase, or time of a signal received by the terminal from a plurality of sources in a network; Sending the measurement to a compute node; Calculating the first terminal location; Calculating a transmission time offset, relative to a reference, of a signal received by the terminal and transmitted by the transmission sources; Adjusting the transmission time offset for the transmission delay to the calculated first terminal position of the signal from each transmission source; Constructing a first list of the adjusted relative transmission time offsets; Sending the first list of adjusted relative transmission time offsets to the terminal;

The time offset is determined between the time base of the satellite positioning system and the reference,

When the satellite timebase time information needs to be determined, at a second terminal location, measuring a relative offset in frequency, phase, or time of a signal received by the terminal from a plurality of sources in the terrestrial network; Sending the measurement to the computing node; Calculating the second terminal location; Calculating a transmission time offset, relative to the reference, of the signal received by the terminal and transmitted by the transmission source; Adjusting a transmission time offset for a transmission delay of a signal from each transmission source to the calculated second terminal position; Constructing a second list of the adjusted relative transmission time offsets; Sending a second list of the adjusted relative transmission time offsets to the terminal; And using one or more members of each of the first and second lists of adjusted transmission time offsets, and a time offset between the time axis of the satellite positioning system and the reference, to generate a synchronization marker for the satellite positioning system time axis. A method of calibrating uncorrected visual information in a mobile terminal is provided.

The method can be further understood with reference to FIG. 1 and the following discussion of what information has been sent between the computational node and the terminal and what has been measured by the terminal to construct a calibrated synchronization marker on the satellite time base. have.

Referring to FIG. 1, a signal from the transmitter 103 of the network 107 is received by the terminal 101, and the arrival time of a particular signature in the signal is measured against the clock of the terminal. If t _A1 is the time it has received the signature in the signal from transmitter A (a particular one of transmitters 103), when the terminal is in position 1, t _A1 is as follows.

Where α _A is the transmission time offset of transmitter A, ε ₁ is the time offset of the terminal's clock at position 1, all times are expressed relative to universal time, r _A1 is the distance between the terminal and the transmitter, is the speed of radio waves in the medium in which transmission occurs. In addition, such measurements are made on signals received from transmitters B, C, D, ..., and the whole set is sent from terminal 101 to a computing node in the network (not shown in FIG. 1) ( It should be noted that the interval at which the measurement is made is so short that deviations from constant time compliance of the clock in the terminal can be ignored).

As described in the applicant's applications WO-A-00-73813 and WO-A-00-73814, the computing node is a transmission time offset α _A corresponding to transmitters A, B, C, D, ... A calculation is performed to generate all of α _B , α _C , α _D and the position of the terminal. Since the position of the terminal is also calculated and the positions of the transmitters A, B, C, D, etc. are also known, the corresponding values r _A1 , r _B1 , r _C1 , r _D1, etc. can also be calculated. Thus, the transmission time offset can be adjusted during additional propagation time of the signal from each transmitter to the terminal. If the adjusted transmission time offset is designated β _A1 β _B1 β _C1 β _D1 , for example, β _A1 is given as follows.

A set of βs corresponding to the transmitters A, B, C, D, etc., received at terminal location 1, is sent from the computing node to the terminal. The terminal stores the set of βs in its internal memory. The difference between the two values of β, β _A1 -β _B1 represents the time difference between the reception by the terminal of the signature in the signal from transmitters A and B at terminal position 1 (actually this difference is within the computational node Due to the error mitigation techniques (such as obtaining averages) and errors in the measurements used, they may not be exactly the same as those measured by the terminal).

Applicants' applications WO-A-00 / 73813 and WO-A-00 / 73814 also describe how corrections can be made for terrestrial transmitters with frequency differences such that each of the time signatures drift with respect to each other. This correction can, as a result, be applied to the value of β. Moreover, the referenced cases show how correction can be additionally applied to the observed times of arrival of the terrestrial transmitter signature to compensate for the operation of the mobile terminal.

As described above, according to the present invention, the terminal also measures the satellite positioning signal at position 1 from which the satellite time base is extracted. In essence, a clock signal is generated by a satellite receiver in the terminal that represents satellite time. The clock signal is compared with the arrival of the signature of the signal received from one of the transmitters 103, for example transmitter A. In addition, the time offset between the arrival of the satellite clock and the arrival of the signature, Δt _A1, is measured. If ts is the satellite timebase time of the elapse of the satellite clock, the arrival of the signature in the signal from the transmitter A is in satellite time.

The stored list of βs can now be used to correct the arrival time of the signature received from the corresponding transmitters with respect to satellite time. For example, the signature in the signal from network transmitter B will reach satellite time.

In this way, the terminal corrects the signal from all network transmitters received at position 1 for satellite time.

Now the terminal cannot receive the satellite signal, but in addition to it from at least one member of the stored set of βs (let's say transmitter B), it can receive the signal from the network transmitters P, Q, R, S, etc. Move to another location (let's say position 2). The terminal performs measurements on the signals received from the network transmitters P, Q, R, S, etc. and B, and the entire set is sent from the terminal 101 to the computing node. As described above, the calculation node is configured to determine values of the position of the terminal and values of the transmission time offset from which β _B2 , such as corresponding sets of corrected transmission time offsets β _P2 , β _Q2 , β _R2 , β _S2, etc. are extracted. Perform the calculations you generate. These or a subset are sent from the computing node to the terminal and stored as a second set in the terminal's internal memory.

The terminal can now correct the arrival time of the signature in the signal from one of the network transmitters (let's say transmitter P) received at position 2. The satellite time corresponding to this is as follows.

Thus, a calibrated satellite time signal synchronization marker may be derived from the signal received by the terminal at position 2 from the network transmitter P, which may be provided to the satellite receiver to aid in the detection of the satellite signal.

One of the assumptions inherent in the method of the present invention outlined above is that the relative transmission time offset of the network transmitters does not change between the measurement at position 1 and the measurement at position 2. WO-A-00-73813 and WO-A-00-73814 filed by the applicant describe what permits can be made to drift the transmitters, of course the β values can be adjusted as a result. have.

Any of the methods of conveying visual information in a mobile terminal described above can be used to help locate the terminal. Accordingly, the present invention includes a method for determining the position of a mobile terminal of a satellite positioning system in which terminal position information and calibration time information are provided to a satellite receiver in accordance with the present invention, wherein the position of the terminal is at least one of the satellite signals. Is determined using.

Such a method can be used to reduce the time required to calculate the position of the terminal within the satellite positioning system.

The location may be determined using only the satellite signal measurements or may be improved by combining the satellite and network signal measurements.

In this case, when there are not enough satellite signals to obtain a complete position and time solution, it may be possible to obtain the satellite time base from the calibrated network timing according to the method of the present invention, thereby reducing the number of satellite signals required. Can lose. For example, a three-dimensional position plus time solution requires measurements obtained from signals of four satellites. If the time component is supplied to a synchronization marker, the three-dimensional position solution can only be obtained using three satellite signals. Accordingly, the present invention also includes calculating a position using the synchronization marker in place of signals from satellites.

The present invention provides a complex structure that combines a satellite positioning system and a system using signals from a network of terrestrial communication transmitters. Measurements of signals from terrestrial wireless networks can be used to create and manage a list of timing relationships between them, which are linked to the time base of the satellite positioning system.

The satellite positioning system may be GPS, Galileo or otherwise. The terrestrial transmitter's network may be a cellular mobile telephone network based on GSM, WCDMA or other cellular systems, or may be a transmitter network used for radio or TV broadcasting or may be another terrestrial wireless network.

The generated location typically follows the process. The low accuracy cell level location is immediately available, following the location derived from the network and, later, the location derived from the satellite.

If a location using the satellite system, with assistance, cannot be calculated, the present invention may provide a location based on terrestrial network timing measurements. This provides a more robust system that prevents complete positioning failures compared to unassisted satellite positioning.

If it is not possible to generate assistance data from the terrestrial network signal, the satellite location is still available.

Independent provision of time aiding and position aiding, such as faster time for first fix resulting from maintenance of the transmission time offset list, longer battery life or lower communication utilization, Benefits may be different than in improved accuracy. In addition, a smaller number of correlators are needed, allowing the use of less complex silicon chips for the satellite positioning system.

The relationship between the satellite time base and the wireless network may be initially established by independent or partially assisted location fixing. Further satellite positioning fixations can be used to maintain the timing relationship between satellite and terrestrial wireless networks, even with assistance.

Locations and identifiers of terrestrial network transmitters can be obtained from a database server. When all calculations are made in a terminal, without the aid of a network-based computing node (server), the network transmitter information can be broadcast by a communication network, or a CD-ROM, flash memory device or manual entry. Can be obtained from an offline source such as The information is relatively static and does not require frequent updates.

The present invention is particularly suitable for tracking mobile terminals when the use of both satellite positioning and terrestrial OTDA positioning will allow tracking of continuous and seamless terminals through multiple environments, both outside and inside.

Preferably, the mobile terminal incorporating the present invention comprises a mobile cellular receiver and a GPS receiver operating in a GSM or WCDMA network.

The invention also includes a medium carrying a set of instructions which, when mounted with a terminal comprising a satellite positioning system component, enables the terminal to carry out the method according to the invention.

The invention also provides a mobile terminal of a satellite positioning system, comprising: means for determining a travel time of a signal from an uncalibrated stable system to the terminal; The uncalibrated visual information and the satellite positioning system extracted from the uncalibrated stability system at a first terminal location where a signal from the uncalibrated stability system is available and a signal from the satellite positioning system is available. Time offset determining means for determining a time offset between calibration time information extracted from the apparatus; And the uncalibrated visual information extracted from the signal of the uncalibrated stable system received at the second terminal location, the travel time of the signal from the uncalibrated stable system determined at the first and second terminal locations; And a mobile terminal of a satellite positioning system comprising calibration means for calibrating from the time offset determined at the first terminal location.

The invention also provides a mobile terminal of a satellite positioning system, comprising: means for determining a travel time of a signal from an uncalibrated stable system to the terminal; Uncalibrated visual information extracted from the first uncalibrated stabilized system at a first terminal location where a signal from a first uncalibrated stabilized system is available and a signal from the satellite positioning system is available. Time offset determining means for determining a time offset between and the time correction information extracted from the satellite positioning system; At the second terminal position where the signal from the uncalibrated stabilization system is available, uncalibrated visual information extracted from the first uncalibrated stabilization system and calibration extracted from the second uncalibrated stabilization system Time offset determining means for determining a second time offset between untimed visual information; And uncorrected visual information extracted from the second uncalibrated stability system received at a third terminal location, the signal from the uncalibrated stability system received at the first, second and third terminal locations. And a mobile terminal of a satellite positioning system comprising calibration means for calibrating using the travel time of and the first and second determined time offsets.

Some examples of the present invention and systems in which the present invention may be employed will be further described with reference to the following figures.

1 shows the overall structure of a satellite positioning system employing the present invention.

Figure 2 illustrates the main functional components, signaling and data flow of a first mobile terminal for use in the system of the present invention.

3 illustrates the main functional components, signaling and data flow of another mobile terminal for use in the system of the present invention.

4 is a flow diagram illustrating a process used to calculate a location within the system of FIG. 1 using the mobile terminal of FIG.

5 is a flow diagram illustrating a process used to calculate a location within the system of FIG. 1 using the mobile terminal of FIG.

6 shows an alternative structure in which the terminal communicates with a network application for exchanging location information.

Figure 7 illustrates an alternative structure in which a process can obtain some information about a network deployed from a server using a communication link.

8 illustrates an alternative structure in which location calculation may be performed by an apparatus communicating with the terminal while located outside of the terminal.

1 shows an example of a system implementing the present invention, specifically, the overall structure of a satellite positioning system. Terminal 101 receives a signal that is broadcast from satellite 102 of GPS system 100. The terminal 101 also receives a signal broadcast by the terrestrial network 107, in this case the base transceiver station of the GSM network.

FIG. 2 shows the main functional components of the mobile terminal 101 used in the system shown in FIG. The terminal 101 comprises a GPS module 201 comprising a receiver for receiving a signal via a patch antenna 203 from a satellite of the GPS system 100 and a GSM wireless network 107 via an antenna 204. General purpose processor 205 including a GSM module 202 including a receiver for receiving signals and a software program (not shown) typically associated with such devices within a memory, processing circuit and mobile terminal. And an oscillator circuit 206 for providing a clock signal to the terminal 101 and a software program 209 running on the general purpose processor. The program 209 and the general purpose processor 205 constitute a computing node. The locator module 207 and the network timing list 208 are part of the software program 209.

3 shows similar functional components in another terminal 101. The calculation node is in this case located in a server 301 connected to the network 107. The terminal 101 communicates with the server 301 via a communication link 302 that is part of normal communication of the GSM network. The server 301 includes a processor 303 for driving a software module including the locator module 304 and the network timing list 305.

2 or 3, the GSM module 202 also has a user interface (not shown) having the ability to output information from and to the terminal, and standard features of a GSM terminal, while details are here. Other timing measurements of the signal received from the base station 103 by the GSM module 202, transmitter identification, received signal strength, Observed Time Difference of Arrival (OTDA), described in WO99 / 21028, which is incorporated herein by reference. A signal processor (not shown) that provides the ability to perform network measurements such as < RTI ID = 0.0 >

In the terminal shown in FIG. 2, these measurements are taken of the signal broadcast by the base station 103 of the GSM network 107 using the method described in WO-A-00 / 73814 filed by the applicant. From the measured OTDA, a list of Transmission Time Offsets (the value of α in Equation 1 above) is passed to the general purpose processor 205 for calculating in the software module 207. The calculation also requires the geographic location of the base station 103 to be known, which are obtained from a database as described in WO-A-00 / 73814. These values of α are stored in the network timing list 209.

Within the terminal shown in FIG. 3, OTDA values are communicated to the server 301 via a communication link 302. The calculation is then performed in the locator module 304 and the values of a are stored in the network timing list 305. In this case, however, further calculation is performed to convert the value of α to the value of β as shown in Equation 2 above. These values of β are then sent back to the terminal 101 via the communication link 302, and they are stored in the network timing list mirror 308.

The GPS module 201 in the terminal 101 of FIG. 2 or 3 receives and measures signals from the satellites 102 of the GPS system 100. The timing measurements of the signal from the satellite network 100 are used to calculate the location of the terminal as described below.

2 also shows signaling and data flow within the terminal 101. Oscillator circuit 206 provides clock timing signals for GPS module 201 and GSM module 202. The signal of the serving cell of the GSM network received by module 202 is used to adjust the frequency of the oscillator to match the received GSM signal. That is, the signal generated from the regulated oscillator clock signal matches that of the received GSM signal. The clock signal generated from the oscillator 206 is provided to the GPS module 201 (211) and also provided to the GSM module (202) (216). The values of OTDA and other measurements measured by the GSM module 202 are communicated via link to the general purpose processor 205 (214). Data to be transmitted to the GSM network 107 by the GSM module 202 is transferred 215 over the link from the general purpose processor 205. A signal representing GPS time is transmitted 212 from the GPS module 201 to the general purpose processor 205 via a link. The synchronization marker signal generated in accordance with the present invention is transferred 213 from the general purpose processor 205 via the link to the GPS module 201.

The relationship of the time base of the GPS system 100 to one or more members of the transmission time offset (value of α) list in the network timing list 208, 308 by software in the example of FIG. 2 or 3. The GPS timing signal 212 is used to establish. The relationship is shown in Table 1 below. The table shows, for each of the five base stations 103A-E (column 1) of the GSM network 107, the signals received by the GSM receiver in the module 202 in the general purpose processor 205. Denotes the calculated transmission time offset (column 2) with respect to the criterion (the "third criterion"). The time is expressed in microseconds, and the modulo 1 burst length (about 577 microseconds) expressed as plus / minus half of the burst, since the way of making measurements is ambiguous to this extent. In this case, the third criterion was calculated as the transmission time offset of one member of the list 103C. Column 3 is a list of transmission time offsets for the GPS time base. In this specific example, the time offset between the third reference and the GPS time base was 67413.99 microseconds, as described below.

Base station identifier Transmission time offset with respect to the third criterion Transmit time offset for GPS timebase 103A -22.6 67391.28 103B 219.7 67633.58 103C 0.0 67413.88 103D -184.8 67229.08 103E 89.5 67503.38

A flowchart of the operation of the mobile terminal of FIG. 2 is shown in FIG.

Some time after the terminal 101 is turned on, measurements of the first set of base station signals are made at 'spare terminal location' (step 401). After some time, measurements of the second set of base station signals are made at 'first terminal location' (step 402). These two measurement sets are used to calculate the list of network transmission time offsets (value of α) (step 403). The measurement of the base station signal is performed periodically in step 402, and the list of transmission time offsets of the base station signal is updated in step 403 after each set of measurements.

Separately, in step 410, the GPS receiver obtains and measures a signal from the satellite 102, and in step 412, a signal 212 is generated representing the GPS time base. The signal is associated with a third criterion, for which a list of timing offsets generated in step 403 has been established (step 408).

When there is a request for a location (step 404) (at the 'second terminal location'), a recent set of satellite data is loaded from the local satellite information database 411 which is maintained in the GPS module 201 as conventionally. (Step 405). Using the GSM network signal, a location is calculated (step 407) and provided as an initial location to the GPS module 201 via a link 217.

The synchronization marker 213 is created in the general purpose processor 205 (step 409). The relationship between the GPS time base and the third criterion, determined in step 408, is to determine the location of the terminal (calculated in step 407) by allowing a transmission delay of the signal from the base station used to adjust the oscillator circuit 206. Adjusted to take into account.

The time aid provided by the synchronization marker 213 in step 409 is used by the GPS module 201 to define a signal search space for improved acquisition of the satellite signal.

The satellite signal is obtained and measured at step 410 assisted by the satellite information generated at step 405, the initial position prediction value generated at step 407 and the time aid (synchronization marker 213) generated at step 409. Satellite information decoded from the received satellite signal is stored in a local satellite information database 411 that is used for subsequent positioning attempts.

The position of the mobile receiver is calculated in step 413 using the satellite signal obtained in step 410, and the position is output to the requesting application, for example, an external server or software running in the mobile terminal 101 ( Step 414).

In use, a timing model of the base station transmission time offset is established as described above, and the GPS time base is measured at any GPS position fix, for example made under conditions of a sunny sky. Thus, a relationship between the GPS time base and the terrestrial transmission time offset is established and they are used to help continue GPS positioning under the harsh conditions mentioned above.

The previously described embodiment operates without the need for the terminal 101 to communicate with the GSM network 107. Thus, the terminal does not need to be registered on the network (including the terminal transmitting to the network), but needs to be able to receive a signal broadcast by the base station.

As described above, the calculation of the list of transmission time offsets may also be performed in a server connected to the terminal via a wireless link. Thus, another implementation using the terminal of FIG. 3 is now described, where the terminal 101 is used in a GSM network and the calculation is performed in a server 301 connected to the network. The communication between the terminal and the server is in this case via a Short Message Service ('SMS'), although this may be by way of example by GPRS or other convenient means.

5 shows a flowchart of this specific case. Same as shown in FIG. 4 except for the deletion of steps 401 and 407 and the addition of steps 402a and 403a. In this case, the GSM network signal timing offset is measured at step 402 and sent to the network server 301 at step 402a. In step 403, the calculation is performed. Next, a list of values of β is sent back to the terminal (step 403a).

Another embodiment is now described in which the present invention is included in a positioning system in which terminals can communicate with other servers connected to a communication network.

Another example of a system implementing the present invention is shown in FIG. In this example, a communication link 110a-c between the terminal 101 and an external application server 106 connected via the Internet 108 and the GSM network 107 is included. The communication link 110a between the terminal 101 and the GSM network 107 is wireless. The communication link 110b between the network 107 and the internet 108 is generally implemented with a cable connection. The communication link 110c connects the server 106 to the internet 108, which is generally implemented as a cable connection.

In operation, an application provided on the server 106 requests the location of the terminal 101 to calculate its location in the same manner as described in the previous example. The resulting location is sent to the requesting application using communication links 110a-c.

Another arrangement for implementing the invention is shown in FIG. In this case, the other server 105, which is connected to the Internet 108 via the link 110d, has information about the GSM network 107, such as the geographic location of the base station 103, clock correction information and satellite emperor. Contains static and semi-static configuration information such as ephemeredes. The information is broadcast to the terminal 101.

In another arrangement, similar to that described in the preceding paragraph (using the system of FIG. 7), when there is a request by the terminal 101 using the communication link 110 as described above, the configuration information is Retrieved. The information obtained from the server 105 is used to supplement the local satellite information database in the terminal 101, in particular for the first operation of the terminal. The initial position prediction value and the timing aid are locally generated as in the first embodiment.

Another embodiment is shown in FIG. 8. In this case, the GPS location calculation function is separated from the terminal 101 in communication with the external location calculation device 109 used to calculate the location of the terminal. The GPS timing measurements provided to the position calculation device 109 are measured in the terminal 101.

It is common in the art that the present invention applies equally without limitation to satellite navigation systems other than GPS (e.g., Galileo, Beidou, Compass, QZSS and Glonass). It will be understood by those who have knowledge of. In addition, the present invention relates to non-GSM communication systems (e.g., CDMA, W-CDMA, TDMA, TDS-CDMA, PDC, IDen) and other networks of terrestrial transmitters (e.g., public broadcast networks, digital radio and television). It will be understood that the same applies without limitation and the like.

Claims (39)

One or more capable of receiving a signal from which the calibration time information carried by the calibrated system can be extracted, and receiving a signal from which the uncalibrated time information carried by the uncalibrated stable system can be extracted. A method of calibrating uncorrected visual information in a mobile terminal having the above receiver, At a first terminal location where a signal from the uncalibrated stability system is available and a signal from the calibrated system is available, a first travel time of the signal from the uncalibrated stability system and the uncalibrated Determining a time offset in the mobile terminal between uncorrected visual information extracted from a stable system and calibrated visual information extracted from the calibrated system; And At a second terminal location where no calibrated visual information is available, a second travel time of the signal from the uncalibrated stable system is determined in the mobile terminal and a calibration extracted from the signal of the uncalibrated stable system Correcting the uncorrected visual information in the mobile terminal using the first and second travel times and the time offset determined at the first terminal location. . Receive a signal from which the calibration time information carried by the calibrated system can be extracted, and receive a signal from which the uncalibrated time information carried by the first and second uncalibrated stable systems can be extracted. A method of calibrating uncalibrated visual information in a mobile terminal having one or more receivers, the method comprising: A first travel time of the signal from the first uncalibrated stable system at a first terminal location where a signal from the first uncalibrated stable system is available and a signal from the calibrated system is available Determining, within the mobile terminal, a first time offset between the uncalibrated time information extracted from the first uncalibrated stable system and the calibrated time information extracted from the calibrated system; At a second terminal location where signals from the first and second uncalibrated stabilization systems are available, a second travel time of the signal from the first uncalibrated stabilization system and the second uncalibrated A second between the third travel time of the signal from the stabilization system and the uncalibrated visual information extracted from the second uncalibrated stabilized system and the uncalibrated visual information extracted from the first uncalibrated system Determining a time offset within the mobile terminal; And At a third terminal location where calibrated time information from the calibrated system is not available, a fourth travel time of the signal from the second uncalibrated stable system is determined within the mobile terminal, and the first Calibrating the uncalibrated visual information extracted from the signal of the second uncalibrated stable system using second, third and fourth travel times. To calibrate non-visual information. The method according to claim 1 or 2, The travel time of signals received by the mobile terminal from the uncalibrated stable system is inferred from a round trip travel time value or timing advance of the signal received by the mobile terminal from the uncalibrated stable system. And correcting the uncorrected visual information in the mobile terminal. The method according to claim 1 or 2, The movement time of the signal received by the mobile terminal from the uncalibrated stability system is calculated from the relative position of the uncalibrated stability system and the mobile terminal. How to. 5. The method of claim 4, Wherein the position of the uncalibrated stable system is obtained from a database. 5. The method of claim 4, And the position of the uncalibrated stable system is decoded from a signal received by the mobile terminal from the uncalibrated stable system. 5. The method of claim 4, And the position of the mobile terminal is calculated from measurements of signals received by the mobile terminal from the uncalibrated stable system. The method of claim 1, For use in a mobile terminal capable of receiving signals from a source in a satellite and terrestrial network of a satellite positioning system having a time base, the calibrated time information is carried by a synchronization marker and is not calibrated in the mobile terminal. How to calibrate information, Measuring, at the spare terminal location, a relative offset in frequency, phase, or time, relative to a first reference, of a signal received by the mobile terminal from a plurality of sources in the terrestrial network; Measuring a relative offset in frequency, phase, or time, relative to a second reference, of a signal received by the mobile terminal from the same source at the first terminal location; Calculating a transmission time offset, relative to a third criterion, of signals received by the mobile terminal and transmitted by the transmission source; Constructing the list of relative transmission time offsets; Calculating a first terminal location; And The time offset is determined between the time base of the satellite positioning system and the third reference, When satellite timebase time information needs to be determined, at a second terminal location, the third criterion of the signal received by the mobile terminal from at least three (3) of the plurality of transmitters in the terrestrial network Measure a relative offset in frequency, phase, or time, determine the second location of the mobile terminal, and time offset between the time axis of the satellite positioning system and the third reference, the second terminal location and transmission Generating a synchronization marker for the satellite positioning system time base using one or more members of the list of time offsets. 3. The method of claim 2, For use in a mobile terminal capable of receiving signals from satellites of a satellite positioning system having a time base and from a source in a terrestrial network, the calibration time information is carried by a synchronization marker and is not calibrated in the mobile terminal. How to calibrate it, Measuring, at a spare terminal location, a relative offset in frequency, phase, or time, relative to a first reference, of a signal received by the mobile terminal from a plurality of sources in a terrestrial network; Measuring, at a first terminal location, a relative offset in frequency, phase, or time, relative to a second reference, of a signal received by the mobile terminal from the same source; Calculating a transmission time offset, relative to a third reference, of a signal received by the mobile terminal and transmitted by the transmission source; Constructing the list of relative transmission time offsets; Calculating the first terminal location; The time offset is determined between a time base and a third reference of the satellite positioning system, If a signal from the satellite positioning system is corrupted or unavailable, for a fourth criterion of the signal received by the mobile terminal from at least one of the same source and another source in the terrestrial network, at a second terminal location, Measuring a relative offset in frequency, phase or time; Calculating a transmission time offset, relative to a fifth reference, of a signal received by the mobile terminal and transmitted by the transmission source; Constructing the list of relative transmission time offsets; Calculating the second terminal location; The time offset is determined between the fifth criterion and the third criterion, When satellite timebase time information needs to be determined, at a third terminal location, for the fifth reference, frequency, phase, or of the signal received by the mobile terminal from at least three (3) of the sources in the terrestrial network, Measure a relative offset in time, determine a third location of the mobile terminal, the time offset between the time axis of the satellite positioning system and the third reference, the time offset between the fifth and third references, Generating a synchronization marker for the satellite positioning system time base using one or more members of the third terminal location, the second terminal location, and the list of transmission time offsets. To correct uncorrected visual information in. The method according to claim 1 or 2, The mobile terminal being assisted by a server connected to the mobile terminal via a communication link, the server performing calculations necessary for the extraction of the uncalibrated visual information from the uncalibrated stable system; To correct uncorrected visual information in. 10. The method according to claim 8 or 9, And any two or more of the first, second, third, fourth, and fifth criteria are the same criterion. 10. The method according to claim 8 or 9, At least one of said first, second, third, fourth and fifth criteria is a signal received by a receiver. 10. The method according to claim 8 or 9, At least one of the first, second, third, fourth and fifth criteria is a signal generated locally in the mobile terminal. . The method according to claim 1 or 2, The mobile terminal is assisted by a server connected to the mobile terminal via a communication link, which performs the necessary calculations for the extraction of the uncalibrated visual information from the uncalibrated stable system and from the source in the terrestrial network. For use in a mobile terminal capable of receiving a signal from a satellite of a satellite positioning system having a signal and a time axis of, the calibration time information is carried by a synchronization marker and the uncorrected time information in the mobile terminal is used. How to calibrate, Measuring, at a first terminal location, a relative offset in frequency, phase, or time of a signal received by the mobile terminal from a plurality of sources in a terrestrial network; Sending a measurement of a signal received by the mobile terminal to a computing node; Calculating the first terminal location; Calculating a transmission time offset, relative to a reference, of a signal received by the mobile terminal and transmitted by the transmission sources; Adjusting the transmission time offset for the transmission delay to the calculated first terminal position of the signal from each transmission source; Constructing a first list of the adjusted relative transmission time offsets; Sending the first list of adjusted relative transmission time offsets to the mobile terminal; The time offset is determined between the time base of the satellite positioning system and the reference, Measuring the relative offset in frequency, phase or time of a signal received by the mobile terminal from a plurality of transmitters in a terrestrial network, when satellite time base time information needs to be determined, wherein Measuring at least one of the sources at the first terminal location; Sending a measurement of a signal received by the mobile terminal to a computing node; Calculating the second terminal location; Calculating a transmission time offset, relative to the reference, of the signal received by the mobile terminal and transmitted by the transmission source; Adjusting a transmission time offset for a transmission delay of a signal from each transmission source to the calculated second terminal position; Constructing a second list of the adjusted relative transmission time offsets; Sending the second list of adjusted relative transmission time offsets to the mobile terminal; And Generating a synchronization marker for the satellite positioning system time axis, using one or more members of each of the adjusted first and second lists of transmit time offsets, and a time offset between the reference and the time axis of the satellite positioning system. And correcting the uncorrected visual information in the mobile terminal. One or more capable of receiving a signal from which the calibration time information carried by the calibrated system can be extracted, and receiving a signal from which the uncalibrated time information carried by the uncalibrated stable system can be extracted. A system for calibrating uncorrected visual information in a mobile terminal having the above receiver, Means for determining a travel time of a signal from the uncalibrated stable system to the mobile terminal; At the first terminal position where the signal from the uncalibrated stability system is available and the signal from the calibrated system is available, uncalibrated visual information extracted from the uncalibrated stability system and the calibrated Time offset determining means for determining a time offset between calibrated time information extracted from the system; And An uncalibrated time point extracted from the signal of the uncalibrated stability system using the travel time of the signal from the uncalibrated stability system determined at the first terminal position and the time offset determined at the first terminal position And calibrating means for calibrating the information, wherein the uncalibrated visual information is calibrated in the mobile terminal. Receive a signal from which the calibration time information carried by the calibrated system can be extracted, and receive a signal from which the uncalibrated time information carried by the first and second uncalibrated stable systems can be extracted. A system for calibrating uncorrected visual information in a mobile terminal having one or more receivers, Means for determining a travel time of a signal from the uncalibrated stable system to the mobile terminal; Uncalibrated extracted from the first uncalibrated stability system at a first terminal location where the signal from the first uncalibrated stability system is available and the signal from the calibrated system is available. Time offset determining means for determining a first time offset between time information and calibrated time information extracted from the calibrated system; The uncalibrated visual information and the second uncalibrated visual information extracted from the first uncalibrated stability system at a second terminal location where the signals from the first and second uncalibrated stability systems are available. Time offset determining means for determining a second time offset between uncorrected visual information extracted from the stable system; And The uncorrected visual information extracted from the signal of the second uncalibrated stabilization system at a third terminal location of the signal from the uncalibrated stabilization system received at the first, second and third terminal locations. And calibrating means for calibrating using the travel time and the first and second determined time offsets. The method according to claim 15 or 16, One or more capable of receiving a signal from which the calibration time information carried by the calibrated system can be extracted, and receiving a signal from which the uncalibrated time information carried by the uncalibrated stable system can be extracted. And a mobile terminal having a receiver, wherein the uncorrected visual information is corrected in the mobile terminal. The method of claim 17, The mobile terminal includes a first receiver capable of receiving a signal capable of extracting calibration time information carried by the calibrated system, and And a second receiver capable of receiving a signal from which the uncalibrated visual information carried by the uncalibrated stable system can be extracted. The method of claim 17, The mobile terminal further comprises a third receiver capable of receiving a signal from which the uncalibrated visual information carried by the second uncalibrated stability system can be extracted. System for correcting visual information. The method according to claim 15 or 16, And said time offset determining means is arranged in a mobile terminal of the satellite positioning system. The method according to claim 15 or 16, And the calibration means is arranged in the mobile terminal of the satellite positioning system. The method according to claim 15 or 16, And the calibrated system includes a clock disposed within the mobile terminal. The method according to claim 15 or 16, And the calibrated system is one or more satellites of the satellite positioning system. The method according to claim 15 or 16, And wherein the uncalibrated system is one or more transmitters of a wireless system. The method of claim 24, And wherein said one or more transmitters are transmitters of a broadcast system. The method of claim 24, And the one or more transmitters are transmitters of a communication system. The method according to claim 15 or 16, The travel time of the signal from the uncalibrated stability system received by the mobile terminal is extracted from a round trip travel time value or timing advance of the signal received by the mobile terminal from the uncalibrated stability system. And calibrate uncorrected visual information in a mobile terminal. The method according to claim 15 or 16, The movement time of the signal received by the mobile terminal from the uncalibrated stability system is calculated from the relative position of the uncalibrated stability system and the mobile terminal. System. The method of claim 28, And wherein the position of the uncalibrated stable system is obtained from a database. 30. The method of claim 29, And the database is maintained in the mobile terminal. 30. The method of claim 29, And the database is maintained in a server to which the mobile terminal can be accessed for use. The method of claim 28, And wherein the position of the uncalibrated stable system is decoded from a signal received by the mobile terminal from the uncalibrated stabilized system. The method of claim 28, And the position of the mobile terminal is calculated using measurements of the signal received by the mobile terminal from the uncalibrated stable system. The method according to claim 15 or 16, And wherein said uncalibrated stable system includes a clock running inside said mobile terminal. A medium storing a set of instructions that, when the medium is mounted to a mobile terminal comprising satellite positioning system components, enable the mobile terminal to perform the method according to claim 1. A mobile terminal of a satellite positioning system, Means for determining a travel time of a signal from an uncalibrated stable system to the mobile terminal; The uncalibrated visual information and the satellite positioning system extracted from the uncalibrated stability system at a first terminal location where a signal from the uncalibrated stability system is available and a signal from the satellite positioning system is available. Time offset determining means for determining a time offset between calibration time information extracted from the apparatus; And The uncorrected visual information extracted from the signal of the uncalibrated stability system received at the second terminal position is converted into the time of travel of the signal from the uncalibrated stability system determined at the first and second terminal positions and And a calibration means for calibrating from the time offset determined at the first terminal location. A mobile terminal of a satellite positioning system, Means for determining a travel time of a signal from an uncalibrated stable system to the mobile terminal; Uncalibrated visual information extracted from the first uncalibrated stabilized system at a first terminal location where a signal from a first uncalibrated stabilized system is available and a signal from the satellite positioning system is available. Time offset determining means for determining a time offset between and the time correction information extracted from the satellite positioning system; At the second terminal position where the signal from the uncalibrated stabilization system is available, uncalibrated visual information extracted from the first uncalibrated stabilization system and calibration extracted from the second uncalibrated stabilization system Time offset determining means for determining a second time offset between untimed visual information; And The uncorrected visual information extracted from the second uncalibrated stabilization system received at a third terminal location of the signal from the uncalibrated stabilization system received at the first, second and third terminal locations. And calibration means for calibrating using the travel time and the first and second determined time offsets. The calibration time information is calibrated according to the method of claim 1 or 2, and one or more capable of receiving a signal from which calibration time information carried by the calibrated system can be extracted to determine the location of the mobile terminal. A positioning method of a mobile terminal having the above receiver. The method according to claim 1 or 2, And wherein the uncalibrated stability system includes a clock running inside the mobile terminal.

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