CN1288645A - Cellular radio system providing at least two measuring methods for locating a mobile station - Google Patents
Cellular radio system providing at least two measuring methods for locating a mobile station Download PDFInfo
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- CN1288645A CN1288645A CN 99802173 CN99802173A CN1288645A CN 1288645 A CN1288645 A CN 1288645A CN 99802173 CN99802173 CN 99802173 CN 99802173 A CN99802173 A CN 99802173A CN 1288645 A CN1288645 A CN 1288645A
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- base station
- measurement mechanism
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
Abstract
The invention relates to a cellular radio system comprising, in each cell, at least one base station (100, 102) communicating (104) with terminals (106) located within its area. To advantageously locate a terminal, the system of the invention comprises at least one set of measuring means (112, 114) for listening to the signals sent by the terminals and for collecting measurement data for at least two different terminal location methods.
Description
The present invention relates to a kind of cellular wireless system, in each sub-district of this system, comprise at least one and the base station that is positioned at its regional terminal communication.
Mobile telephone system is general to cover wide geographic area, comprises a plurality of overlay areas, perhaps sub-district, and each sub-district provides service by a base station usually.The size of sub-district is generally decided according to the telephone business volume in this zone, differs greatly.In the heavy traffic density area, cell size is generally less than calls out less zone.No matter cell size is how, all such situation can appear usually, promptly know the geographical position of mobile phone and the situation that moving direction can be more favourable.
In order to determine the geographical position of terminal, developed multiple diverse ways.A kind of known systems method is direction search (DF) method, the signal that is sent by two DF receiver receiving terminals at least in this method.Network must roughly be known the position of terminal in advance, can control terminal sends the DF receiver in the overlay area of signal, the signal that receiving terminal sent simultaneously.In other words, the DF receiver must be known from the transmission parameter of the next signal of terminal, for example used channel, time slot and any frequency hopping.Like this, signaling message has produced load in network.Each DF receiver is estimated the arrival direction of the signal that terminal sent.According to the known location of this information and DF receiver, each DF receiver can be derived a sector, and the direction at terminal place has been indicated in this sector.Terminal can be located by the common factor of two or more sectors.The quantity of sector many more (being the DF receiver), position precision is good more.Each DF receiver is notified to the network element of being responsible for calculating, for example mobile positioning center MPC with its measurement result.
In the prior art scheme, the DF receiver is positioned at base station or other suitable position.This scheme needs antenna sets to come the arrival direction of estimated signal.In order to allow the DF receiver to measure the signal of self terminal better, can require terminal to carry out intra-cell and change with full transmitting power.The DF method is not suitable for requiring the situation of continuous position monitoring, because required signaling has increased the weight of network load.Need the situation of the terminal of location One's name is legion also can to load by emphasis network.The accuracy of DF method is not high in the urban district, and this is because multipath transmisstion that building caused and reflection make the definite accurate inadequately of direction of arrival of signal in the urban district.
Another known locations method is based on due in (TOA, the due in of signal; TDOA, step-out time).In this method, increased a receiver in the base station.This receiver is monitored the terminal transmission of another base station of mailing to this terminal of service.In order to allow receiver to measure the signal that sends from terminal better, require terminal to carry out intra-cell and change, the access message that the accessory receiver receiving terminal in the adjoining base station sends at handover with full transmitting power.
Said method requires each base station accurately to determine to insert the moment of message by using same time standard.This requires the synchronously common of receiver.In fact, the GPS receiver can be installed to provide synchronous in receiver.Problem is that adjoining base station can be listened to the transmission of terminal.This has limited this method, makes the zone that this method can only quite be disperseed in the base station, for example the rural area.In addition, the finite capacity of this method is because each accessory receiver once can only be measured a terminal reliably.
The third known method is based on the observation time difference (OTD) between signal.In the method, terminal is measured the timing difference between the base station.If base station asynchronous, this method also needs the information of synchronization among base stations poor (RTD, the real time is poor) so.Determine the position of base station according to this information.This method is described in detail in patent application FI954705.
In a word, we can say the terminal location that still is not applicable to varying environment.
Therefore, the purpose of this invention is to provide a kind of cellular wireless system, this system can advantageously utilize one or more localization methods to come locating terminal.This realizes by the system of describing in the preorder, it is characterized in that, this system comprises at least one group of measurement mechanism, is used to monitor the signal that terminal sends, and is that at least two kinds of different method of locating terminal are collected measurement data.
The preferred embodiments of the present invention are open in relevant claim.Basic thought of the present invention is that characteristic that different localization methods comprises and function can be realized by same equipment.For example, in the digital tdma system, for example in the gsm system, OTD and TOA localization method need similarly to measure and equipment, thereby provide the measurement mechanism of supporting two kinds of methods simultaneously comparatively favourable.
The solution of the present invention has a plurality of advantages.If same equipment can pass through the distinct methods locating terminal, then can easily select the localization method of the most suitable particular case or environment, the perhaps combination of localization method.The solution of the present invention is also comparatively favourable aspect equipment disposition, because can avoid repeating realization, thereby can provide the positioning equipment of Unified Form at the difference of network.This makes maintenance costs to save in a large number.System operator can be utilized the solution of the present invention, and the quantity that increases measurement mechanism with required stepping amount gradually is with the structure positioning service.The quantity of measuring equipment has determined certainty of measurement, i.e. one of service parameter.
For the energy measurement correct signal in TOA and the DF method for example, measurement mechanism must be known the channel (for example frequency of digital tdma cellular system and time slot) that terminal is sending.The network element of control survey device, for example mobile positioning center or base station controller can be notified to measurement mechanism with this time slot, but measurement mechanism still must be known the timing of terminal.Measurement mechanism is measured the transmission of the base station of this terminal of service then, obtains the timing information of base station and terminal.In TOA and TDOA method, after measurement mechanism had been measured the signal that terminal sent, they must stamp timestamp to measurement result.A kind of possibility is to use the GSP signal as time reference.Another program is to stab the timing rise time of the suitable base station of measurement mechanism utilization (for example serving the base station of this terminal).Measurement mechanism is known regularly when receiving transmission from the base station.In addition, measurement mechanism can also be measured other signal of base station to obtain the timing difference between the base station.The base station measurement that carries out according to measurement mechanism, network element, mobile positioning center for example, can determine the timing difference between the base station, thereby the timestamp of the terminal signaling that permission different measuring device is reported corresponds to each other (all measurement mechanisms that in other words, participate in the particular terminal location are not necessarily wanted can measure the base station of this terminal of service and use the timing of this base station).
In the OTD method, the timing difference between the base station must perhaps must be known synchronously in the base station.In order to learn timing difference, measurement mechanism can be measured the signal that send the base station, determines signal arrival time difference.This process is similar to process required in the TOA method (not needing the base station to carry out synchronous transmission), and promptly TOA and TDOA method are similar to OTD method institute requirement to the measurement mechanism requirement.If the measurement mechanism in the TOA/TDOA method is included as TOA/TDOA and measures the GPS receiver of beating timestamp, then can utilize the transmission of the synchronous different base station of GPS, as long as measurement mechanism is positioned at the base station.Another kind of possibility in this case is that the timing of base station is compared with the clock among the GPS, and the information that obtains before is given to for example mobile positioning center, is used to draw the timing difference between the base station.
Describe the present invention in detail at preferred embodiments and drawings below, in the accompanying drawings:
Fig. 1 has illustrated cellular wireless system of the present invention;
Fig. 2 a and 2b have illustrated the example of structure of measuring equipment of the present invention;
Fig. 3 has illustrated the example of the signaling of system of the present invention in positioning action; And
Fig. 4 has illustrated another example of the signaling of system of the present invention in positioning action.
Below in conjunction with Fig. 1, investigate structure according to cellular wireless system of the present invention.Below be example with the wireless system of GSM type, although those skilled in the art understand that obviously the solution of the present invention also can be applied to other system.
This system comprises a plurality of base stations 100,102, they be positioned at its regional terminal communication.Fig. 1 shows communicate by letter with terminal 106 104 situation of first base station 100.This system also comprises the base station controller 107,108 of controlling the base station.In system shown in this figure, first base station 100 is by 107 controls of first base station controller, and second base station 102 is by 108 controls of second base station controller.A base station controller can be controlled one or (usually) a plurality of base stations.For simplicity's sake, the figure shows the situation that each base station controller is only controlled a base station.
Base station controller is then communicated by letter with mobile switching centre 110, the operation of latter's monitoring and coordination base station controller, and forward call to the other parts of network, and external network.
System of the present invention comprises at least one group of measurement mechanism 112,114 (GEMU, universal measurement unit), and they are at least two kinds of different method of locating terminal and collect measurement data.Fig. 1 shows first and second measurement mechanisms 112 and 114.This measurement mechanism can be positioned at the base station, second device 114 for example shown in Figure 1; They can be integrated into the base station; Perhaps as self-contained unit.Another kind of scheme is that measurement mechanism can separate with other network element, for example first measurement mechanism 112 of Fig. 1.The localization method that measurement mechanism is supported comprises for example above-mentioned DF, OTD and TOA/TDOA method.
This system also comprises mobile positioning center (MPC) 116, and it utilizes measurement mechanism 112,114 information of being collected by using one or more localization methods, and other possible information position of calculating required terminal.The location also can be other local calculating, and for example in travelling carriage, as long as with additional information, for example timing difference between the base station and base station coordinates send to travelling carriage.Mobile positioning center is communicated by letter with mobile switching centre 10 with measurement mechanism.Measurement mechanism 112,114 in logic can be by one or more network element control.Measurement mechanism can be the independent equipment of control of mobile positioning center for example, and they also can be controlled simultaneously by mobile positioning center and base station controller.
Fig. 2 a and 2b are the component diagram of the example of structure of explanation measurement mechanism 112.Let us is at first investigated Fig. 2 a.Measurement mechanism at first comprises antenna 200, is used to receive the signal of needs monitoring.Measurement mechanism also comprises receiver components 202, and it can receive and measure the desired signal that receives by antenna.Receiver components 202 can realize that it is substantially similar to base station receiver parts and/or terminal receiver parts by the prior art mode.Measurement mechanism also comprises control unit 204, and it is realized by processor and necessary breaking circuit.The all operations of control unit receiver control parts 202 and measurement mechanism.Measurement mechanism also comprises transceiver components 206, and measurement mechanism utilizes it to communicate by letter with the other parts of network.Like this, as shown in Figure 1, be independent of other network equipment positioning measuring device 112.Measurement mechanism has to the connection of mobile positioning center 116.Connect 118 and can realize that the implementation method that is adopted has determined the CONSTRUCTED SPECIFICATION of transceiver components 206 by various different modes.For example, the connection 118 between measurement mechanism 112 and the mobile positioning center 116 can be used as modulation and connects realization, for example connects as the PCM with attached cable, perhaps realizes as wireless connections.X.25 or IP the agreement enterprise network and the Internet of realizing connecting 118 can also realize by public or unshared data network, for example by.The private calls that wireless connections can be used as in the cellular wireless system realizes, connects as the grouped data in the cellular wireless system and realizes, perhaps realizes by the special realization that can avoid signaling traffic load.In these cases, transceiver components 206 meets and connects required realization.If adopt for example wireless connections, then these parts transceiver of can be used as cellular wireless system is realized, is perhaps controlled as control unit 204, transmits the modulator-demodulator of required measurement data and realizes.
Then we investigate Fig. 2 b.Except above-mentioned part, measurement mechanism also comprises GPS receiver 208, and it receives gps signal by antenna 210.GPS receiver 208 allows measurement mechanism its clock and Measuring Time synchronously.But the GPS receiver is not necessary to the operation of equipment, because can realize by the frame rate of base station synchronously yet.If measurement mechanism is positioned at the base station, as measurement mechanism shown in Figure 1 114, then the structure of transceiver components 206 nature is corresponding to this realization.In this scheme, measurement mechanism 114 physical connections 120 are to base station 102.They can be controlled according to realizing by mobile positioning center 116 and/or base station controller 108 in logic.This is connected 122 by base station controller 108 with the logic that possible mobile switching centre 110 is provided to mobile positioning center 116.Below in conjunction with Fig. 3, investigate according to the measurement mechanism of this embodiment realization and the communication between the mobile positioning center 116.
Let us continues to investigate Fig. 1 and Fig. 2 a and 2b.The front said that measurement mechanism 112,114 was that at least two kinds of different method of locating terminal are collected measurement data, measurement mechanism support, for example above-mentioned DF, OTD and TOA/TDOA method.Measurement mechanism is measured its time of advent (at the TOA method) from terminal 106 received signals 124,126.The receiver components 202 that measurement utilizes control unit 204 to be controlled is realized.In addition, the arrival direction (at the DF method) that measurement mechanism can measuring-signal.In order to determine arrival direction, the antenna 200 of measurement mechanism can realize that this antenna sets is determined the angle of arrival of received signal by phasing signal by antenna sets.Antenna sets can realize and control by art methods.
For the OTD method, measurement mechanism carries out RTD and measures from base station received signal 128,130.Measurement is realized by the receiver components 202 that control unit 204 is controlled.For the OTD method, the timing that terminal 106 is measured the signal 104,134 that comes from the base station.
Measurement mechanism is given to mobile positioning center 116 before with measurement result, and the latter adopts one or more localization methods, the position of the required terminal of collecting according to measurement mechanism of information calculations.Except the information that obtains like this, for example DF and TOA method also need out of Memory, the coordinate of measuring equipment for example, and this can obtain by art methods.The mobile positioning center control survey device of also may cooperating with base station controller and/or mobile switching centre.It can also have other function relevant with the location.It is professional whether mobile positioning center can have the right to use according to the position detection terminal, whether at all can't locating terminal, still utilize the application of the mobile positioning center locating terminal of whether having the right.In addition, the charging of calling and ticket are handled and be can be used as the positioning function that mobile positioning center controls and realize.Mobile positioning center 116 can be the specific installation in the network, and it also can be integrated into other network element (for example being integrated into base station controller or mobile switching centre), and perhaps its function can distribution.
In order to measure, measurement mechanism needs the information of used Traffic Channel of terminal or signaling channel.Mobile positioning center can or obtain this information from base station controller or mobile switching centre automatically by inquiry, and it can be sent to measurement mechanism with this information.Mobile positioning center can for example pass through MAP (MAP) agreement from mobile switching centre's queried channel information.If also by this base station controller control, then base station controller can directly be transmitted to measurement mechanism with information needed and any order to this measurement mechanism in logic.
If measurement mechanism separates with other network equipment as independent unit, then transmission between measurement mechanism and the mobile positioning center and signaling can freely design, and promptly do not need to defer to the signaling of cellular wireless system.For example, message can transmit by traditional telephone line.But measurement mechanism preferably is positioned at the base station, can advantageously utilize existing transmission like this, may can also utilize existing signaling channel.Fig. 3 has illustrated a kind of possibility model of signaling diagram, and the system postulation that relates to is a gsm system.This signaling is controlled by mobile positioning center.In this signaling example hypothesis district 3 base station BTS 1, BTS2 and BTS3 are arranged, these base stations are controlled by same base station controller BSC, and each base station has measurement mechanism GEMU1, GEMU2 and GEMU3.Let us supposes that further terminal MS is arranged in base station BTS 1 zone and communicates by letter with it.
In step 301, the new MAP message of mobile positioning center utilization is asked radio channel information from mobile switching centre.
In step 302, mobile switching centre utilizes new A interface message from base station controller request radio channel information.
In step 303, channel information, time slot and the frequency hop sequences of use are replied and sent to the new A interface message of base station controller utilization to mobile switching centre.
In step 304, mobile switching centre utilizes new MAP message that radio channel information is transmitted to mobile positioning center.
In step 305, mobile positioning center is determined the measurement mechanism near the base station of this terminal of service, sends to start by mobile switching centre and measures message is installed the base station of this measurement mechanism to control base station controller.This message sends by new MAP message.
In step 306, mobile switching centre utilizes new A interface message to start and measures forwards to base station controller.
In step 307, the operation that the base station controller utilization is new and safeguard (O﹠amp; M) message will start the measurement forwards to the base station.
In step 308, the base station is removed operation and is safeguarded head in message, give measurement mechanism with forwards.
In step 309, measurement mechanism carries out necessary measurement, and the result is transmitted to the base station.
In step 310, the base station is packaged into operation and maintain message with measurement result, gives base station controller with forwards.
In step 311, the new MAP message of base station controller utilization sends to mobile switching centre with measurement result.
In step 312, mobile switching centre utilizes new MAP message that measurement result is sent to mobile positioning center.
Fig. 4 has illustrated another example of possible signaling diagram.The system postulation that relates to is a gsm system.In this embodiment, signaling is controlled simultaneously by mobile positioning center and base station controller.In this signaling example hypothesis district 3 base station BTS 1, BTS2 and BTS3 are arranged, these base stations are controlled by same base station controller BSC, and each base station has measurement mechanism GEMU1, GEMU2 and GEMU3.Let us supposes that further terminal MS is arranged in base station BTS 1 zone and communicates by letter with it.
In step 401, mobile positioning center request mobile switching centre starts the required measurement of positioning action.
In step 402, mobile positioning center request base station controller starts the required measurement of positioning action.
In step 403, base station controller is determined to utilize new operation and safeguard (O﹠amp near the measurement mechanism of the base station of this terminal of service; M) message will start the measurement forwards to the base station.
In step 404, the base station is removed operation and is safeguarded head in message, give base station controller with forwards.
In step 405, measurement mechanism carries out necessary measurement, and the result is transmitted to the base station.
In step 406, the base station is packaged into operation and maintain message with measurement result, gives base station controller with forwards.
In step 407, the new A interface message of base station controller utilization sends to mobile switching centre with some or all measurement results.
In step 408, mobile switching centre utilizes new MAP message that measurement result is sent to mobile positioning center.
Although should be appreciated that in above two examples, all by same base station controller control, this might not be actual conditions in the base station.These base stations also can be by different base station controller control.Like this, various scheme can be used for the signaling transmission.The signaling transmission can send to other base station controller by mobile switching centre from the base station controller of serving this terminal.Another program is that mobile switching centre controls all base station controllers.
Although example has below in conjunction with the accompanying drawings been described the present invention, obviously the present invention is not limited thereto, but can change in several ways in the disclosed innovative idea of appended claim book.
Claims (12)
1. cellular wireless system, in each sub-district of this system, the base station (100,102) that comprises at least one communicate by letter with the terminal (106) that is positioned at its zone (104), it is characterized in that, this system comprises at least one group of measurement mechanism (112,114), be used to monitor the signal that terminal sends, and be that at least two kinds of different method of locating terminal are collected measurement data.
2. according to the system of claim 1, it is characterized in that the signal that measurement mechanism (112,114) monitoring base station and terminal are sent.
3. according to the system of claim 2, it is characterized in that measurement mechanism obtains timing information from the signal that terminal sent.
4. according to the system of claim 1, it is characterized in that measurement mechanism (114) is positioned at the base station.
5. according to the system of claim 1, it is characterized in that this system comprises the base station controller (107,108) of controlling one or more base stations, and mobile switching centre (110).
6. according to the system of claim 2, it is characterized in that measurement mechanism (112,114) is collected the measurement data of positioning action based on the observation time difference (OTD) between signal.
7. according to the system of claim 1, it is characterized in that measurement mechanism (112,114) is collected the measurement data of positioning action based on the direction search (DF) of signal.
8. according to the system of claim 1, it is characterized in that measurement mechanism (112,114) is collected the measurement data of positioning action based on the due in (TOA, TDOA) of signal.
9. according to the system of claim 1, it is characterized in that this system comprises device (116), uses one or more localization methods, come the position of computing terminal according to measurement mechanism institute gathered data.
10. according to the system of claim 5, it is characterized in that this system comprises device (116), be used for the required measurement of one or more localization methods that control survey device (112,114) positions particular terminal.
11. the system according to claim 10 is characterized in that, for control survey device (112,114), device (116) is cooperated with another network element (107,108,110).
12. the system according to claim 10 is characterized in that, the message between the control device (116) of base station (102), base station controller (106,108) and mobile switching centre (110) transmission measurement mechanism and measurement mechanism.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI980076 | 1998-01-15 | ||
| FI980076A FI980076A (en) | 1998-01-15 | 1998-01-15 | The cellular radio system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1288645A true CN1288645A (en) | 2001-03-21 |
Family
ID=8550390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99802173 Pending CN1288645A (en) | 1998-01-15 | 1999-01-15 | Cellular radio system providing at least two measuring methods for locating a mobile station |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1060626A2 (en) |
| CN (1) | CN1288645A (en) |
| AU (1) | AU2055299A (en) |
| FI (1) | FI980076A (en) |
| NO (1) | NO20003626D0 (en) |
| WO (1) | WO1999037109A2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102196559A (en) * | 2011-05-04 | 2011-09-21 | 西安电子科技大学 | Method for eliminating channel delay errors based on TDOA (time difference of arrival) positioning |
| US8614975B2 (en) | 2008-09-19 | 2013-12-24 | Qualcomm Incorporated | Synchronizing a base station in a wireless communication system |
| US8688139B2 (en) | 2009-09-10 | 2014-04-01 | Qualcomm Incorporated | Concurrent wireless transmitter mapping and mobile station positioning |
| US8982851B2 (en) | 2009-01-06 | 2015-03-17 | Qualcomm Incorporated | Hearability improvements for reference signals |
| US9037155B2 (en) | 2008-10-28 | 2015-05-19 | Sven Fischer | Time of arrival (TOA) estimation for positioning in a wireless communication network |
| US9091746B2 (en) | 2010-07-01 | 2015-07-28 | Qualcomm Incorporated | Determination of positions of wireless transceivers to be added to a wireless communication network |
| CN106662634A (en) * | 2014-09-25 | 2017-05-10 | 英特尔公司 | Device-to-device assisted positioning in wireless cellular technologies |
| WO2021134345A1 (en) * | 2019-12-30 | 2021-07-08 | 华为技术有限公司 | Location method and apparatus |
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| FR2789539B1 (en) * | 1999-02-10 | 2001-04-20 | Raoul Girod | RADIOTELEPHONE LOCATION TERMINALS |
| US6603976B1 (en) * | 1999-08-03 | 2003-08-05 | Ericsson, Inc. | Architecture for TOA positioning with LMU control functionality in BSC |
| US6606501B1 (en) * | 1999-11-10 | 2003-08-12 | Ericsson, Inc. | TOA Positioning of GPRS mobiles within the BSS centric architecture of a GSM network |
| GB0023366D0 (en) | 2000-09-23 | 2000-11-08 | Koninkl Philips Electronics Nv | Mobile radio terminal and related method and system |
| US20050043036A1 (en) * | 2001-07-05 | 2005-02-24 | Ioppe Igor V | Apparatus and method for obtaining location information of mobile stations in a wireless communications network |
| GB0401767D0 (en) * | 2004-01-27 | 2004-03-03 | Koninkl Philips Electronics Nv | Positioning systems |
| EP1937014B1 (en) * | 2006-12-20 | 2018-07-25 | Vodafone GmbH | Method for determining the applicability of location dependent features to a communication connection within a mobile communication network, sensing device and network unit |
| US9144055B2 (en) | 2013-10-15 | 2015-09-22 | Qualcomm Incorporated | Method and apparatus for asynchrosous positioning of wireless base stations |
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| US5317323A (en) * | 1993-03-05 | 1994-05-31 | E-Systems, Inc. | Passive high accuracy geolocation system and method |
| DE4409178A1 (en) * | 1994-03-17 | 1995-09-21 | Siemens Ag | Determining positions of mobile stations in mobile radio system |
| FI101445B (en) * | 1995-10-03 | 1998-06-15 | Nokia Mobile Phones Ltd | Mobile location system |
| AUPN733395A0 (en) * | 1995-12-22 | 1996-01-25 | University Of Technology, Sydney | Location and tracking system |
| US6047192A (en) * | 1996-05-13 | 2000-04-04 | Ksi Inc. | Robust, efficient, localization system |
| ATE245332T1 (en) * | 1997-05-09 | 2003-08-15 | Nokia Corp | METHOD FOR DETERMINING THE TIME DIFFERENCE BETWEEN RADIO TRANSMITTERS, RADIO NETWORK WITH SUCH RADIO TRANSMITTERS AND CORRESPONDING MOBILE STATION |
-
1998
- 1998-01-15 FI FI980076A patent/FI980076A/en unknown
-
1999
- 1999-01-15 CN CN 99802173 patent/CN1288645A/en active Pending
- 1999-01-15 AU AU20552/99A patent/AU2055299A/en not_active Abandoned
- 1999-01-15 WO PCT/FI1999/000024 patent/WO1999037109A2/en not_active Application Discontinuation
- 1999-01-15 EP EP99900886A patent/EP1060626A2/en not_active Withdrawn
-
2000
- 2000-07-14 NO NO20003626A patent/NO20003626D0/en not_active Application Discontinuation
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8614975B2 (en) | 2008-09-19 | 2013-12-24 | Qualcomm Incorporated | Synchronizing a base station in a wireless communication system |
| US9001742B2 (en) | 2008-09-19 | 2015-04-07 | Qualcomm Incorporated | Synchronizing a base station in a wireless communication system |
| US9037155B2 (en) | 2008-10-28 | 2015-05-19 | Sven Fischer | Time of arrival (TOA) estimation for positioning in a wireless communication network |
| CN102197315B (en) * | 2008-10-28 | 2015-11-25 | 高通股份有限公司 | Arrival time (TOA) for positioning within a wireless communication network is estimated |
| US8982851B2 (en) | 2009-01-06 | 2015-03-17 | Qualcomm Incorporated | Hearability improvements for reference signals |
| US9774431B2 (en) | 2009-01-06 | 2017-09-26 | Qualcomm Incorporated | Hearability improvements for reference signals |
| US8688139B2 (en) | 2009-09-10 | 2014-04-01 | Qualcomm Incorporated | Concurrent wireless transmitter mapping and mobile station positioning |
| US9091746B2 (en) | 2010-07-01 | 2015-07-28 | Qualcomm Incorporated | Determination of positions of wireless transceivers to be added to a wireless communication network |
| CN102196559A (en) * | 2011-05-04 | 2011-09-21 | 西安电子科技大学 | Method for eliminating channel delay errors based on TDOA (time difference of arrival) positioning |
| CN102196559B (en) * | 2011-05-04 | 2013-12-25 | 西安电子科技大学 | Method for eliminating channel delay errors based on TDOA (time difference of arrival) positioning |
| CN106662634A (en) * | 2014-09-25 | 2017-05-10 | 英特尔公司 | Device-to-device assisted positioning in wireless cellular technologies |
| WO2021134345A1 (en) * | 2019-12-30 | 2021-07-08 | 华为技术有限公司 | Location method and apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| WO1999037109A3 (en) | 1999-09-16 |
| WO1999037109A8 (en) | 1999-10-21 |
| NO20003626L (en) | 2000-07-14 |
| WO1999037109A2 (en) | 1999-07-22 |
| AU2055299A (en) | 1999-08-02 |
| EP1060626A2 (en) | 2000-12-20 |
| FI980076A (en) | 1999-07-16 |
| NO20003626D0 (en) | 2000-07-14 |
| FI980076A0 (en) | 1998-01-15 |
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