CN1306708A - Absolute time synchronization for mobile positioning in cellular communications system - Google Patents
Absolute time synchronization for mobile positioning in cellular communications system Download PDFInfo
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- CN1306708A CN1306708A CN99807539.6A CN99807539A CN1306708A CN 1306708 A CN1306708 A CN 1306708A CN 99807539 A CN99807539 A CN 99807539A CN 1306708 A CN1306708 A CN 1306708A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/0055—Synchronisation arrangements determining timing error of reception due to propagation delay
- H04W56/006—Synchronisation arrangements determining timing error of reception due to propagation delay using known positions of transmitter and receiver
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
- G01S5/0205—Details
- G01S5/0244—Accuracy or reliability of position solution or of measurements contributing thereto
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
- G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
- G01S1/022—Means for monitoring or calibrating
- G01S1/026—Means for monitoring or calibrating of associated receivers
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- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
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- Mobile Radio Communication Systems (AREA)
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Abstract
A method and system are diclosed for time-synchronizing a plurality of radio base stations (RBS1-4) in a cellular communications network. A reference terminal (106) (e.g., modified standard mobile terminal) is placed at known locations at each RBS site in the network, preferably as close to the base station antenna (104) as possible. The reference terminal (106) includes an absolute time reference function, which is used to synchronize the RBS (102) with respect to a common absolute time reference. Consequently, a positioning algorithm can be used to determine the position of a mobile terminal (12) in the network with a relatively high degree of accuracy.
Description
Technical field of the present invention
Invention relates generally to moving communicating field, specifically, relates to and is used for the method and system that cellular communication system is accurately determined portable terminal (TM) position.
Description of related art
Prior art discloses the many methods that are used for determining at cellular communication system the MT geographical position.The signal that some existing localization method utilizations send from MT arrives the basis of the time of radio base station (RBS) as location Calculation.These methods be commonly referred to the time of advent (TOA) or the time of advent poor (TDOA) method of measurement.For example, measure constantly common, several RBS are to measuring the time of advent of the signal of determined MT from its position.Central authorities' computing function is converted into distance with the different times of advent of the signal of MT, and this result is used for determining the position of MT.The time that the precision of this TOA method mainly arrives each RBS by happening suddenly is determined with respect to the accuracy of benchmark common time.In essence, in order to obtain high accuracy, these RBS need receive the high precision time benchmark, and must know these RBS time delay in the reception antenna signalling channel separately.
Fig. 1 is a simplified block diagram, and it illustrates the MT navigation system (10) of the time of advent of typical prior art.As shown in the figure, make its position that determined MT 12 and RBS (RBS1 to 4) is synchronous.The described MT 12 of networking command produces and sends one or more bursts (burst).Each RBS (RBS1 to 4) is separately to measuring the time of advent from the burst of MT 12.These RBS by with common time benchmark compare to determine separately time of advent, and the report of the central node in network time of advent separately.The processor of central node is according to the time of advent of those reports the position of described MT being calculated.
All the time the absolute time unit (ATu) that a solution of following the tracks of the absolute time in the cellular system of being advised is connected to each RBS based on calibration and use to the antenna time delay.For example, the Atu that is connected to RBS can comprise global positioning system (GPS) receiver.The calibration data of Dao Chuing is stored in the database of RBS thus.
The major issue of above-described absolute time method is: the receiving unit that absolute time information need be distributed to the RBS with known time delay from ATu., owing to there are many different RBS equipment, therefore need know the delay character of each distribution path.In addition, need know the time delay between RBS receiver and the antenna, together with the time delay in the receiver.Used specific antenna is installed and receiver device has caused time delay to change along with Setup Type, working temperature, ageing equipment, receiver type and type of cable etc. on a large scale.Therefore, the number of this time delay variable means: use such primary calibration program that the temporal resolution of unknown precision will be provided.And if do not carry out bigger redesign, such absolute time method will be difficult to be incorporated among the existing RBS.
Except that above-described MT localization method, different base station is synchronized to public " air frame structure " (air frame structure) has been considered to useful, such as application such as the MT handover of the simplification between the base station, MT location to many application.A kind of mobile position estimation that can be used for base station synchronization is based on to the method for Common Air Interface CAI frame structure (air interface frame structure) terminal.For example, a kind of such localization method utilizes the signal of RBS generation to arrive the basis of the time of advent of MT as the location Calculation of MT.The time of advent that resembles so much RBS signal that receives that this MT institute can " hear " is measured with the MT (in the given moment) that is determined in its position, and calculates the poor of those times of advent between happening suddenly.Described MT sends to its RBS that is just serving and arrives time difference information, and this RBS sends to described information the system node that comprises MT location Calculation function.The precision of this method by among the MT time of advent accuracy of measurement and the understanding of the time difference between each RBS determined.
With reference to figure 1, if the RBS shown in all is synchronous together, this means: the air interface of each RBS can be duplicated from benchmark generation common time and with high relatively accuracy by the antenna system of transmitter again.MT to be positioned " listens to " broadcast channel from different RBS, measures the time of advent of burst, calculates the delay inequality between them.
A kind of method based on terminal of such suggestion is provided with reference termination with the known location between RBS.Described reference termination can utilize the location algorithm identical with MT to be positioned to carry out comparison position and calculate.Therefore, this method will solve the RBS time delay of above-mentioned variation and the problem of asynchronous RBS.
, said method major issue is: the reference termination between different RBS will require on-the-spot complicated power and weather control etc.And, find the correct position that is used for reference termination equipment and monitor that its work will be problematic.
And because the variation between the different RBS equipment, making different RBS is problematic synchronously.As previously mentioned, absolute time information need be distributed to the receiving unit of the RBS with known time delay from ATu.
There are many different RBS equipment, therefore need know the delay character of each distribution path.In addition, in this case, need know the time delay between transmitter and the antenna, together with the time delay in the transmitter.Used specific antenna is installed and receiver device has caused time delay to change along with Setup Type, working temperature, ageing equipment, receiver type, stube cable type and combination of antennas equipment etc. on a large scale.Identical with the above-mentioned absolute time method based on RBS, the quantity of such time delay variable means: use such primary calibration program that the temporal resolution of unknown precision will be provided.And if do not carry out bigger redesign, such absolute time method will be difficult to be incorporated among the existing RBS.
General introduction of the present invention
According to most preferred embodiment of the present invention, provide a kind of method and system that is used for making the many radio base station time synchronized of cellular communications networks.Reference termination (for example standard portable terminal of Xiu Gaiing) is placed on the known location of each RBS position of described network, preferably as much as possible near antenna for base station.Reference termination comprises absolute time benchmark function, and the latter is used to make each RBS synchronous with respect to public absolute time benchmark.Therefore, location algorithm can be used for to determine the position of portable terminal in the network than higher accuracy.
An important techniques advantage of the present invention is: not be used in the new hardware interface of introducing between the RBS reference termination relevant with it.
Another important techniques advantage of the present invention is: all time-critical parts all concentrate on a unit, therefore can be being incorporated among the existing RBS based on new navigation system of the present invention, and need not substitute existing RBS equipment.
Another important techniques advantage of the present invention is: can calculate the time of advent with respect to radio air interfaces (being the antenna place), this makes the MT location algorithm change insensitive to different RBS time delays.
Another important technical advantage of the present invention is: the antenna that described method can be used for uplink and downgoing line monitors.
Another important technical advantage of the present invention is: can irrespectively position measurement with the time delay in the antenna system.
Another important techniques advantage of the present invention is: described method can be used for accurate time division multiple access (TDMA) frame synchronization between the RBS.
Another important technical advantage of the present invention is: each RBS that is used for determining the position can be arranged on temporary position (for example exhibition, sports tournament etc.) provisionally.
Another important technical advantage of the present invention is: described reference termination can be used as the positioning reference terminal type that is used for based on the MT location of terminal.
Another important techniques advantage of the present invention is: in navigation system, the mobile RBS with satellite link interface can be used as move " tracking system " in the navigation system, thereby reference termination can work to be connected to the user interface of position algorithm function.
The simple description of accompanying drawing
Can obtain more complete understanding with reference to following detailed in conjunction with the accompanying drawings to method and apparatus of the present invention, in the accompanying drawing:
Fig. 1 is a simplified block diagram, and it illustrates the MT navigation system of the time of advent of typical prior art;
Fig. 2 is a simplified block diagram, and it illustrates according to canonical system most preferred embodiment of the present invention, that be used for cellular communications networks radio base station time calibration;
Fig. 3 is a precedence diagram, and its explanation is a kind of according to typical method most preferred embodiment of the present invention, that can be used for refreshing in the radio base station shown in Figure 2 absolute time information;
Fig. 4 is a precedence diagram, and its explanation can be used to determine typical time of advent of the measuring sequence of base station location in the cellular communications networks according to (when for example setting up in system) most preferred embodiment of the present invention, initial; With
Fig. 5 is a precedence diagram, and its explanation is according to measuring sequence typical time of advent most preferred embodiment of the present invention, that can use in the mobile terminal locations in determining cellular communications networks.
Fig. 2 by with reference to the accompanying drawings understands most preferred embodiment of the present invention and its advantage better to Fig. 5, and the part identical and correspondence of each figure is used identical label.
Fig. 2 is a simplified block diagram, and it illustrates according to canonical system most preferred embodiment of the present invention, that be used for cellular communications networks radio base station time calibration (100).System 100 comprises the RBS102 that is connected to antenna subsystem 104.For illustrative purposes, the canonical system 100 shown in describing with the form of the part of global system for mobile communications (GSM) network., the invention is not restricted to GMS, and can comprise any suitable utilize radio signal regularly (for example TDMA) determine the cellular network of mobile terminal locations.And, although a canonical system 100 that is used for RBS (102) is carried out time calibration only is shown, however can be in cellular communications networks many similar system duplicated systems 100 that are used for other RBS (not shown) is carried out time calibration.
RT106 can be the standard MT that revises.For present embodiment, RT106 is the MT with propagation delay time of calibration.For example, for the purpose of calibration, with the delay character of antenna cable 110, predetermined and local storage RT106 intrinsic inherent time delay.Cable 110 (having known time delay) is connected to send/receive antenna 112 with RT106.For this exemplary embodiments, antenna 112 is antennas of the GSM send/receive antenna part and the GPS reception antenna part of combination.
Except standard MT parts, RT106 also comprises absolute time reference cell (not shown).For this embodiment, the absolute time reference cell can be the GPS receiver.Therefore, RT106 can receive the absolute location information of high precision timing signal and/or RT106 from the GPS receiver.Therefore, if RT106 and RBS102 are perhaps known apart from position and the direction of RBS102 at same position, so, can also know the absolute position of RBS.GPS receiver in RT106 can be synchronous with the phase-locked loop (PLL) among the described RT.The absolute time information of deriving from the absolute time reference cell with PPL is used for the described RT of precise marking by the processor the RT106 and sends moment of each burst through air interface like this.The described RT timing information that should happen suddenly is stored in the local storage, preferably also via radio air interfaces described absolute time information (for example burst X that sends in time T) is sent to RBS102.Also can utilize the standard message transportation protocol timing information that will happen suddenly to send to other network components by RBS102.Resemble below will be in more detail as described in, the absolute burst timing information separately known to each RBS in the cellular network among many RBS is used for determining more accurately the position of portable terminal by TOA or TDOA location algorithm.
Fig. 3 is a precedence diagram, and its explanation is a kind of according to typical method most preferred embodiment of the present invention, that can be used for refreshing among the RBS102 shown in Figure 2 (or any similar network RBS) absolute time information.As being used for shown in the task of explanation, absolute time method for refreshing 200 is applied to RBSb (for example RBS102 among Fig. 2) and its RT that interrelates (for example RT106)., also described method can be applied to refresh absolute time information among each other network RBS (for example RBSc 102 ' and RBSa 102 ").
In the step 202 of described typical method, RBS 102 is connected with its RT that interrelates 106 (preferably via radio air interfaces) and the burst of ordering RT 106 to produce to be used to send (measure-or M-burst).This is responded, and RT106 reads in (for example via the PLL that is connected to the GPS receiver) absolute time, sends the M-burst via antenna element 112 by air interface simultaneously.And RT106 is with benchmark absolute time value (the absolute transmitting time of described burst, or At of M-burst
0) be stored in the local storage.
In step 204, receive the M-burst of described transmission via antenna subsystem 104 by RBS102.RBS102 measures the time of advent of the M-burst that is received, and the value time of advent of described measurement is interrelated with absolute time counter (AT-CNT) value that is stored among the described RBS.(the At time of advent with the M-that received burst
1) be stored in the local storage of described RBS102.
In step 206, the relative RT106 of RBS102 connects (preferably via described radio air interfaces) and asks M-burst transmission time information (At
0).This is responded, and in step 208, RT106 preferably sends information requested via described air interface to RBS102.RBS102 (internal processor) calculates the transmission value fiducial time (At of M-burst then
0) and be worth (At the time of advent that receives
1) between difference.Processor among the RBS102 uses difference (Δ t) to refresh the absolute time value among the AT-CNT to difference (Δ t) and compensates any time error that has earlier thus.Between each M-burst refresh that can regularly occur, RBS102 utilizes AT-CNT to inner time cycle counting (for example to pass through, utilize inner TDMA clock, AT-CNT can refresh in the absolute time in cycle or calibration event between " freely turning to " (" free wheel ")) continue to provide absolute time.Therefore, for MT location purpose, the time of advent of the signal that receives from its position MT to be determined can be based on the high-precision absolute time benchmark of measuring at the reception antenna port of relevant RBS provided by the invention.In other words, be used for the reception antenna port of the datum mark of the high accuracy measurement time of advent at relevant RBS.Therefore, according to the present invention, the time delay between reception antenna (for example 104) and the RBS (102) is compensated.
At a different aspect of described most preferred embodiment, following method can be used to make the TDMA operation in the RBS network synchronous.Network base station controller (BSC) or mobile services switching centre (MSC) are to all relevant RBS (for example, be similar to each RBS of RBS102) send message, order described each RBS time alignment to be carried out in the generation and the transmission of tdma slot according to given absolute time started value (TDMA-start).Each RBS utilizes above-mentioned AT-CNT value to wait for the TDMA counter of TDMA-start order and beginning (or adjustment) RBS separately.Above-mentioned absolute time counter method for refreshing 200 also can be used to improve TDMA precision regularly in the network.Network B SC (or MSC) can ask each RBS to provide its TDMA Counter Value separately with known absolute time, so that the monitoring network synchronization accuracy.
In the remodeling based on terminal of this respect of the present invention, the synchronous RT of each and its RBS separately can continue to measure the time of advent with the burst of absolute time value representation, and described absolute time value is stored in the local storage.The described RT of Centroid (for example BSC among the GSM or MSC) order returns the absolute time report of the tdma frame structure of its RBS separately.The processor of Centroid is estimated the time difference between the RBS, and calculates the time deviation of each RBS.Centroid sends to relevant RBS with time deviation separately as Control Parameter, so this time deviation of The latter is adjusted its aerial timing generator and made the time error minimum of transmitter antenna point.Therefore, the TOA from the burst of the RBS of these time calibrations that is received by the MT algorithm that can be positioned is used for determining more accurately the position of this MT.
For the purpose of checking, Centroid can order RT to report the absolute time information of tdma frame structure termly, perhaps as the part of system monitoring function and report at any time.Can carry out above-mentioned synchronizing function step by step based on terminal, such as, for example at first make the contiguous RBS of same cells synchronous, make the contiguous RBS of other sub-district synchronous then, or the like, up to whole network quilt synchronously.Therefore, this method will be considered all time-delays of antenna system and complete " air interface is synchronous " will be provided.
Fig. 4 is a precedence diagram, and its explanation can be used to determine typical time of advent of the measuring sequence 300 of base station location in the cellular communications networks according to (when for example setting up in system) most preferred embodiment of the present invention, initial.At first, in step 302, each relevant RBS (for example RBS102 among Fig. 2) orders its relevant RT (for example RT106) to send the geographical position (for example X, Y or latitude and longitude coordinate) of RT via air interface, and the latter can obtain from the GPS receiver of RT.This is responded, and in step 304, RT sends the positional information of (preferably via air interface) request to RBS (102).To the centralized positioning function among the network MSC, the positional information that RBS reported that the latter can be such with each is as the basis that is used for the MT position calculation with this location information report for RBS.
Fig. 5 is a precedence diagram, and its explanation is according to measuring sequence 400 typical time of advent most preferred embodiment of the present invention, that can use in the mobile terminal locations in determining cellular communications networks.Order 400 can be followed and/or replenish top about Fig. 4 described time of advent of measuring sequence 300.In step 402, and the RBS relevant with its position MT (for example MT420) to be determined (for example RBSa102 ") send control information through air interface, order described MT to produce and send one or more timings and measure burst (T-burst).And network B SC or MSC order all and described position to determine that relevant RBS (for example RBSb102, RBSc102 ' and RBSa 102 ") arrives time measurement at preset time, and each is with predetermined frequency and time slot.
In step 404, each RBS receives the T-burst and measures its time of advent separately.Then, each RBS interrelates each self-metering time of advent and absolute time value among the AT-CNT separately.The resulting absolute time value relevant with each self-metering time of advent is stored in the local storage (Mtime of RBS separately
0) in.
The sequential steps of back is in fact with top identical about the described absolute time refresh sequence of Fig. 3 200., can carry out the order of back in each MT locating events, so that for its position MT to be determined (for example MT402) RT relevant with described locating events with each, the time delay that the burst of guaranteeing to be received is experienced is identical.Therefore, the order that is shown in Fig. 5 can be used for compensating variations in temperature and other variation between the different receivers and the delay variation that causes.
In step 406, each relevant RBS RT relevant with it is connected, and orders described RT to produce one or more M-bursts.This is responded, and each RT reads its absolute time benchmark (for example reading from the GPS receiver), sends its M-burst and with described absolute time fiducial value (the absolute transmitting time of described burst, or At
0) be stored in the local storage.In step 408, relevant RBS receives the M-burst that sends from relevant RT, measures the time of advent of described burst, and with described measurement the time of advent value and AT-CNT in the absolute time fiducial value interrelate.RBS with resulting about measured (the At time of advent
1) the absolute time value be stored in local storage.
In step 410, the relative RT of relevant RBS is connected, and the transmission time (At of request M-burst
0).This is responded, and in step 412, relevant RBS receives the transmission time value of M-burst, calculates the absolute time of advent of T-burst, the most handy formula: Abstime=At
0-(At
1-Mtime
0).The absolute time value that the center MT positioning reporting of RBS in being preferably in network MSC calculated.Therefore, make measure accurately consistent the time of advent that is used to carry out determining the MT position with the absolute time fiducial value time that provides of the present invention.
Although in the accompanying drawings and in the foregoing detailed description illustrated most preferred embodiment of method and apparatus of the present invention, but, obviously, the invention is not restricted to disclosed embodiment, manyly reconfigure, revise and replace and do not break away from the spirit of the present invention that the following claim book proposes and defines but can have.
Claims (23)
1. method that is used for making at cellular communications networks at least one radio base station time synchronized, described method comprises the steps:
The reference termination relevant with described at least one radio base station sends at least one measuring-signal, and determines value fiducial time of the described transmission of described at least one measuring-signal,
Described at least one radio base station receives at least one measuring-signal of described transmission, and determine described reception at least one measuring-signal the time of advent value and
Described at least one radio base station refreshes described time of advent of value with being worth described fiducial time.
2. the method for claim 1 is characterized in that also comprising the steps: the benchmark value time of advent that the reception antenna port measurement at described at least one radio base station refreshes.
3. the method for claim 1 is characterized in that described fiducial time, value comprised the absolute time value.
4. the method for claim 1 is characterized in that described fiducial time, value comprised the absolute time value that GPS derives.
5. the method for claim 1 is characterized in that described reference termination comprises the absolute time reference generator.
6. the method for claim 5 is characterized in that described absolute time reference generator comprises the GPS receiver.
7. the method for claim 1 is characterized in that described at least one radio base station comprises the gsm radio base station.
8. the method for claim 1 is characterized in that described refresh step comprises calculating described fiducial time of value and the difference time value between the described time of advent, and the described difference time value of compensation absolute time count value.
9. the method for claim 1 is characterized in that also comprising the steps: that described at least one radio base station of network node order and a plurality of radio base stations make the generation of tdma slot separately consistent with absolute value time time started with transmission.
10. the method for claim 9 is characterized in that also comprising the steps: to measure the described absolute time started value that described TDMA transmits at the transmitter antenna port of described at least one radio base station and described a plurality of radio base stations.
11. the method for claim 1 is characterized in that: described each step is applicable to each in a plurality of radio base stations in the described cellular communications networks, and comprises the step according to the position that is worth to determine portable terminal a plurality of described times of advent of refreshing.
12. be used for making at cellular communications networks the method for a plurality of radio base station time synchronized, described method comprises the steps:
In a plurality of reference terminations each is all reported the absolute time value of TDMA timing parameters separately to network node;
The processor relevant with described network node calculates in described a plurality of radio base station the time deviation value of each, and each described time deviation is based on the comparison between each described absolute time value and described separately the TDMA timing parameters; With
Described network node each in described a plurality of radio base stations sends time refresh command separately.
13. the method for claim 12 is characterized in that also comprising the steps: that the TDMA that each basis in described a plurality of radio base station is adjusted separately from the described time deviation value separately of described network node regularly makes the time error minimum.
14. the method for claim 12 is characterized in that also comprising the steps:
In described a plurality of radio base station each makes the time error minimum according to the timing of adjusting separately from the described time deviation value separately of described network node; With
According to the measurement that described portable terminal receives, determine the position of portable terminal from the time of advent of the burst of each base station in described a plurality of radio base stations.
15. the cellular communications networks of a time synchronized comprises:
A plurality of radio base stations; With
A plurality of reference terminations, in described a plurality of reference termination each be connected in described a plurality of radio base station corresponding one and comprise be used to the described transmission that sends at least one measuring-signal and be identified for described at least one measuring-signal fiducial time value device, at least one measuring-signal that each in described a plurality of radio base stations all comprises at least one measuring-signal of being used to receive described transmission, determine described reception the time of advent value and with described fiducial time value refresh the device of described time of advent of value.
16. the cellular communications networks of claim 15 is characterized in that described fiducial time, value comprised the absolute time value.
17. the cellular communications networks of claim 15 is characterized in that described fiducial time, value comprised the absolute time value that GPS derives.
18. the cellular communications networks of claim 15 is characterized in that in described a plurality of reference termination each all comprises the absolute time reference generator.
19. the cellular communications networks of claim 18 is characterized in that described absolute time reference generator comprises the GPS receiver.
20. the cellular communications networks of claim 15 is characterized in that described a plurality of radio base station comprises a plurality of gsm radios base station.
21. the cellular communications networks of claim 15 is characterized in that the described device that is used to refresh comprises and is used to calculate described fiducial time of value and the difference time value between the described time of advent and refresh the device of absolute time Counter Value with described difference time value.
22. the cellular communications networks of claim 15 is characterized in that also comprising that network node, the latter comprise that being used for the described a plurality of radio base stations of order makes the generation and transmission and public consistent device of value time time started of tdma slot separately.
23. the cellular communications networks of claim 15 is characterized in that also comprising the device that is used for determining mobile terminal locations.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US6577198A | 1998-04-24 | 1998-04-24 | |
| US09/065,771 | 1998-04-24 |
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| Publication Number | Publication Date |
|---|---|
| CN1306708A true CN1306708A (en) | 2001-08-01 |
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ID=22064992
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99807539.6A Pending CN1306708A (en) | 1998-04-24 | 1999-04-09 | Absolute time synchronization for mobile positioning in cellular communications system |
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|---|---|
| EP (1) | EP1074100A1 (en) |
| CN (1) | CN1306708A (en) |
| AU (1) | AU4297999A (en) |
| CA (1) | CA2330280A1 (en) |
| WO (1) | WO1999056413A1 (en) |
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| WO2018119761A1 (en) * | 2016-12-28 | 2018-07-05 | 华为技术有限公司 | Method for determining channel time delay, positioning method, and related device |
| CN110174641A (en) * | 2019-06-14 | 2019-08-27 | 中国科学院自动化研究所 | TDOA localization method, system, device based on time adjustment |
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| IL151524A0 (en) | 2000-03-30 | 2003-04-10 | Cellguide Ltd | Providing time synchronization to a gps locator |
| US6687501B2 (en) * | 2000-10-10 | 2004-02-03 | Qualcomm Incorporated | System and method of dynamically calibrating based station timing using location information |
| JP3462471B2 (en) | 2001-01-19 | 2003-11-05 | 株式会社日立製作所 | Wireless base station transmission timing offset measurement method and offset measurement device |
| FI20021252A0 (en) | 2002-06-26 | 2002-06-26 | Nokia Corp | A method for calculating an absolute time difference in a radio system and a radio system |
| US20070072621A1 (en) * | 2005-09-27 | 2007-03-29 | Mukkavilli Krishna K | Position location using transmitters with timing offset |
| EP3173810B1 (en) | 2009-08-13 | 2019-12-11 | InterDigital Patent Holdings, Inc. | Method and apparatus for supporting positioning measurements |
| DE102015121724A1 (en) * | 2015-12-14 | 2017-06-14 | Symeo Gmbh | System and method with at least three signals receiving stations |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5245634A (en) * | 1992-03-23 | 1993-09-14 | Motorola, Inc. | Base-site synchronization in a communication system |
| US5712867A (en) * | 1992-10-15 | 1998-01-27 | Nexus 1994 Limited | Two-way paging apparatus having highly accurate frequency hopping synchronization |
| GB2277232B (en) * | 1993-03-20 | 1997-06-11 | Motorola Inc | A communications system and a mobile radio |
| US5481258A (en) * | 1993-08-11 | 1996-01-02 | Glenayre Electronics, Inc. | Method and apparatus for coordinating clocks in a simulcast network |
| GB2310098A (en) * | 1996-02-08 | 1997-08-13 | Philip Bernard Wesby | Locating mobile telephone |
-
1999
- 1999-04-09 WO PCT/SE1999/000579 patent/WO1999056413A1/en not_active Application Discontinuation
- 1999-04-09 CA CA002330280A patent/CA2330280A1/en not_active Abandoned
- 1999-04-09 EP EP99947059A patent/EP1074100A1/en not_active Withdrawn
- 1999-04-09 CN CN99807539.6A patent/CN1306708A/en active Pending
- 1999-04-09 AU AU42979/99A patent/AU4297999A/en not_active Abandoned
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| CN101487889B (en) * | 2001-11-02 | 2011-09-14 | Qx有限公司 | Inter-network operation of multiple location networks |
| CN101313619B (en) * | 2005-09-27 | 2013-05-22 | 高通股份有限公司 | Position location using phase-adjusted transmitters |
| US9354297B2 (en) | 2005-09-27 | 2016-05-31 | Qualcomm Incorporated | Position location using phase-adjusted transmitters |
| US8981996B2 (en) | 2005-09-27 | 2015-03-17 | Qualcomm Incorporated | Position location using transmitters with timing offset and phase adjustment |
| WO2008098450A1 (en) * | 2007-02-15 | 2008-08-21 | Huawei Technologies Co., Ltd. | A method, a system and a device for implementing time synchronization in communication network |
| CN101047434B (en) * | 2007-04-10 | 2010-09-29 | 华为技术有限公司 | Time tag synchronous method, system and device |
| CN101188812B (en) * | 2007-04-13 | 2012-01-25 | 华为技术有限公司 | Wireless communication system, air interface synchronization method, base station and control device |
| CN102595588B (en) * | 2007-04-13 | 2014-11-05 | 华为技术有限公司 | Wireless communication system, air interface synchronizing method, base stations and control device of base stations |
| WO2008125052A1 (en) * | 2007-04-13 | 2008-10-23 | Huawei Technologies Co., Ltd. | Wireless communication system, air interface synchronizing method, base station and its controlling apparatus |
| CN101232325B (en) * | 2008-01-31 | 2013-01-09 | 华为技术有限公司 | Radio communication system, midair interface synchronism control method, base station and control device thereof |
| WO2018119761A1 (en) * | 2016-12-28 | 2018-07-05 | 华为技术有限公司 | Method for determining channel time delay, positioning method, and related device |
| US11051267B2 (en) | 2016-12-28 | 2021-06-29 | Huawei Technologies Co., Ltd. | Channel latency determining method, positioning method, and related device |
| CN110174641A (en) * | 2019-06-14 | 2019-08-27 | 中国科学院自动化研究所 | TDOA localization method, system, device based on time adjustment |
| CN115176449A (en) * | 2020-03-03 | 2022-10-11 | 高通股份有限公司 | High-end device assisted low-end device group delay calibration for NR positioning |
| CN115176449B (en) * | 2020-03-03 | 2023-10-13 | 高通股份有限公司 | High-end device assisted low-end device group delay calibration for NR positioning |
| US11877145B2 (en) | 2020-03-03 | 2024-01-16 | Qualcomm Incorporated | Premium device-aided low-tier device group delay calibration for NR positioning |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1074100A1 (en) | 2001-02-07 |
| CA2330280A1 (en) | 1999-11-04 |
| WO1999056413A1 (en) | 1999-11-04 |
| AU4297999A (en) | 1999-11-16 |
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