WO2005011317A1 - Verfahren zum lokalisieren einer mobilen station eines funkkommunikationssystems sowie virtuelle basisstation - Google Patents
Verfahren zum lokalisieren einer mobilen station eines funkkommunikationssystems sowie virtuelle basisstation Download PDFInfo
- Publication number
- WO2005011317A1 WO2005011317A1 PCT/DE2003/002495 DE0302495W WO2005011317A1 WO 2005011317 A1 WO2005011317 A1 WO 2005011317A1 DE 0302495 W DE0302495 W DE 0302495W WO 2005011317 A1 WO2005011317 A1 WO 2005011317A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mobile station
- base station
- virtual base
- radio communication
- communication system
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/30—Network architectures or network communication protocols for network security for supporting lawful interception, monitoring or retaining of communications or communication related information
-
- 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
Definitions
- the invention relates to a method for locating a mobile station of a radio communication system and a virtual base station for performing the localization.
- DE 199 20 222 AI discloses a method in which users of mobile stations, for example of mobile telephones, can be identified and listened to using a virtual base station.
- a virtual base station can be used in the public interest, for example by the police, border guards or an intelligence service.
- the virtual base station described in DE 199 20 222 AI sends a base station on a broadcast channel, for example on a broadcast control channel (BCCH) in accordance with GSM (Global System for Mobile Communications) specification 05.02v8.10.0, chapter 3.3.2 system information of a radio communication system.
- the system information is modified in relation to system information of the base station in such a way that all mobile stations of the radio communication system that are within radio range of the virtual base station and receive the broadcast channel of the virtual base station as the strongest broadcast channel change to a radio cell of the virtual base station and m book this radio cell. Even mobile stations, the identification and listening of which is not intended, therefore log into the radio cell of the virtual base station when the modified system information is received.
- the virtual base station does not know which mobile
- the virtual base station can receive their system information. If a specific mobile station is to be listened to, the virtual base station is initially operated for an unknown period of time without listening to the mobile station until the specific mobile station is finally in its radio area by chance. During the period of time that elapses before the specific mobile station logs in accidentally, unnecessarily many logins from other mobile stations into the radio cell of the virtual base station take place. 'It would be desirable therefore only be carried out in DE 199 20 222 AI-described method, when the specific mobile station in the radio area of the virtual base station. This could result in a lower number of undesired bookings.
- the invention is therefore based on the object of specifying an advantageous method for locating a mobile station of a radio communication system and a corresponding virtual base station for carrying out the method, so that the mobile station can be localized with a low signaling volume.
- a virtual base station sends a request to transmit a signal, for example on a paging channel Channel [PCH]) of a real radio cell of a radio communication system, to the mobile station, receives a signal from the mobile station and carries out the localization on the basis of the received signal.
- PCH paging channel Channel
- the invention makes it possible to use the request to address the mobile station to be located directly, ie other mobile stations for which the request is not intended do not answer the request.
- the mobile station can then be localized on the basis of the signal transmitted on the basis of the request.
- the signal emitted by the mobile station can be a connection setup signal (English: Channel request) or a special response signal, for example a so-called paging response, which the mobile station sends to a real base station of the radio communication system. While a connection setup signal is triggered directly by the request, the transmission of a special response signal (paging response) requires the participation of the real base station by assigning a corresponding channel to the mobile station.
- a connection setup signal English: Channel request
- a special response signal for example a so-called paging response
- the virtual base station assigns the received signal to the mobile station on the basis of identification information contained in the received signal. If the virtual base station receives several signals of the same type, it can recognize from the identification information whether it has received one of the signals from the mobile station. In an alternative embodiment, the virtual base station repeatedly sends further requests to send a signal to the mobile station and receives further signals from the mobile station. In addition to the signals of the mobile station, the virtual base station also receives signals from other mobile stations and allocates of 'the mobile station received signals based on a correlation with the calls to the mobile station.
- the virtual base station can determine, by means of a correlation measurement between the transmission of the requests and the reception of signals, whether it has received signals triggered by the request from the mobile station. A correlation between the received signals and the requests only exists if the mobile station has received the requests and then has sent a corresponding signal.
- This alternative embodiment of the invention makes it possible that no cooperation of a real base station, for example in the form of a channel assignment, is required for the transmission of a special response signal (paging response).
- a particularly precise localization of the mobile station can advantageously be achieved in that the virtual base station determines the direction from which the signals received by the mobile station are received.
- Such direction information ie a direction vector or a connecting line from the virtual base station to the mobile station, can be determined by means of a directional antenna. If at least two receivers, for example the virtual base station and a further receiver, each determine the direction from which they receive signals from the mobile station, the location of the mobile station can be as Intersection of the direction vectors or connecting lines determined by the receivers can be determined.
- the virtual base station advantageously sends the request on a channel of the radio communication system.
- the mobile station receives the request on a channel of the radio communication system known to it in a format customary for the radio communication system and thus does not recognize that the request comes from a virtual, non-network base station.
- the mobile station can therefore be localized without noticing the localization.
- the virtual base station transmits its requests synchronized to the processes in the radio communication system, either in the temporal system of a real base station - if the virtual base station is spatially close to the real base station - or in the local temporal system of the mobile station - if the virtual base station is physically close to the mobile station.
- the transmission power of the virtual base station is sufficiently high to overlay corresponding requests from the real base station, which transmits on the same frequency, in the same channel and in the same time pattern, for the period of sending out the requests.
- the virtual base station receives signals from the mobile station on a channel of the radio communication system.
- the virtual base station can receive signals from the mobile station by listening to it by listening to channels of the radio communication system. These channels are known to the virtual base station, for example, by having previously received system information on a broadcast channel sent by a base station of the radio communication system.
- An access channel is advantageously used as the channel for the signals sent by the mobile station.
- a 'signaling s istskanal used for the call and / or the signals transmitted by the mobile station as a channel.
- a signaling channel is, for example, a random access channel (R ⁇ CH: Random Access Channel) for the signals sent by the mobile station or a call channel (PCH: Paging Channel) for the requests of the virtual base station.
- R ⁇ CH Random Access Channel
- PCH Paging Channel
- the virtual base station according to the invention has all the features necessary for carrying out the method according to the invention.
- Fig. 1 is a flowchart of a localization of a mobile station
- FIG. 2 shows a schematic illustration of a localization of a mobile station according to the invention.
- a mobile station is referred to as a mobile station.
- a mobile station is, for example, a mobile phone, a portable computer with a radio interface or any, portable or stationary device for the transmission of image and / or sound data, for fax, short message service SMS and email transmission and for Internet access. It is therefore a general transmitter and / or receiver unit of a radio communication system.
- a virtual base station is to be understood as a station which, in relation to a radio communication system under consideration, is not part of the radio communication system, i. H. was not set up or operated by the operator of the radio communication system.
- the functionality of a virtual base station corresponds at least partially to the functionality of a real, i.e. H. the base station belonging to the radio communication system.
- a virtual base station can be a modification of the virtual base station described in DE 199 20 222 AI.
- Radio communication systems are systems in which data is transmitted between stations via a radio interface.
- the data transmission can be bidirectional as well as unidirectional.
- Radio communication systems are in particular mobile radio systems, for example according to the GSM or UMTS (Universal Mobile Telecommunications System) standard. Future mobile radio systems, for example of the fourth generation, are also to be understood as radio communication systems.
- the invention is described below using the example of a mobile radio system based on the GSM standard, but without being restricted thereto.
- a virtual base station VBS is shown schematically in FIG. 1, which, on a call channel of a radio communication system referred to as paging channel PCH, receives a request to send a signal, for example sends a so-called paging request to a mobile station MS.
- the request OPEN is structured in the same way as requests sent by base stations of the radio communication system and is sent with a specific transmission power. In this exemplary embodiment, the transmission power is so great that all other similar signals are received at the location of the mobile station MS with such a low power that the mobile station MS can only evaluate the request ON from the virtual base station VBS.
- the request OPEN - represented by the bracketing of the reference symbol ID - contains identification information ID of the mobile station MS on the basis of which the mobile station MS assigns the request OPEN to itself.
- Identification information ID is e.g. B. an IMSI (International Mobile Subscriber Identity) or an IMEI (International Mobile Station Equipment Identity) of the mobile station MS.
- the virtual base station VBS has a transmitting and receiving unit SE for sending requests and for receiving signals sent by the mobile station MS on the basis of the requests. Furthermore, the virtual base station has a control unit P for evaluating the signals received on the basis of the requests and for generating requests.
- the mobile station MS receives on the paging channel PCH des
- the request OPEN from the virtual base station VBS as a normal request ON a base station of the radio communication system.
- the request AUF prompts the mobile station MS to contact a base station of the radio communication system, for example in order to answer a call intended for the mobile station MS.
- the mobile station MS therefore triggers a connection setup signal RE on a random access channel R ⁇ CH (triggered by the request AUF) to a base station BS.
- the base station BS is preferably that base station of the radio communication system with the greatest reception power at the location of the mobile station MS.
- the base station BS receives the connection setup signal REQ and then assigns the channel MSC a channel SDCCH (for example the standalone dedicated control channel [SDCCH] according to GSM specification 05.02v8.10.0, chapter 3.3.4) by means of a corresponding assignment signal ZUW.
- the mobile station MS sends a request response signal RES (paging response) required on the channel SDCCH to the base station BS due to the request UP.
- the request response signal RES contains the same identification information ID - again represented by the bracketing of the reference symbol ID - that was already contained in the request OPEN.
- the virtual base station VBS knows those channels, in particular signaling channels, on which the base station BS assigns channels to mobile stations and receives prompt response signals.
- the virtual base station knows VBS these channels z. B. by receiving system information transmitted over a broadcast channel of the base station BS, for example the so-called BCCH (Broadcast Control Channel).
- BCCH Broadcast Control Channel
- the virtual base station VBS can determine the channel SDCCH used for the transmission of the request response signal RES by listening to the assignment signal ZUW.
- the virtual base station VBS then hears the request response signal RES on the channel SDCCH and can clearly distinguish the request response signal RES based on the identification information ID contained therein from request response signals from other mobile stations, which are also received on this channel SDCCH or other channels.
- connection setup signal REQ received by the virtual base station VBS
- assignment signal ZUW the request response signal
- FIG. 1 By bracketing the arrows of the connection setup signal REQ received by the virtual base station VBS, the assignment signal ZUW and the request response signal, it is shown in FIG. 1 that these signals are not transmitted to the virtual base station VBS in a dedicated manner but are monitored by the latter. These signals are intended for the mobile station MS or the base station BS.
- the arrow for the assignment signal ZUW is only shown chronologically for reasons of clarity.
- the virtual base station VBS can determine that the mobile station is within radio range of the base station BS and within radio range of the virtual base station VBS.
- the location of the mobile station MS is in a radio cell ZBS belonging to the base station BS and can be determined even more precisely since the mobile station MS is also in the radio area ZVBS of the virtual base station VBS.
- the location can thus be on the overlap area of the radio area ZVBS and the ZBS radio cell.
- the location of the base station BS or the geographical location and extent of the radio cell ZBS of the base station BS are known to the virtual base station VBS.
- the virtual base station VBS has data from the radio network planning of the operator of the radio communication system. If additional virtual base stations are used, an even more precise localization can take place, for example, by means of a triangulation, ie by means of the known distance of the mobile station MS from several virtual base stations.
- a virtual base station can also have a directional antenna and thus determine the direction from which it receives the request response signal. Using two virtual base stations equipped with a directional antenna or two directional receivers which receive the signals from a mobile station, a more precise localization can be carried out by means of triangulation.
- the virtual base station VBS sends a first request AUF1 to send a signal to the mobile station MS.
- the request AUF1 is shown - by bracketing the reference symbol ID - contain identification information ID of the mobile station MS on the basis of which the mobile station MS assigns the request AUF1 to itself.
- the mobile station MS then sends a first connection setup signal REQ1 on the random access channel R ⁇ CH to the base station BS.
- the base station BS does not assign a channel this time on which the mobile station MS could send a request response signal.
- the base station BS has no capacity to assign a channel to the mobile station MS or the base station BS recognizes that the first connection is not transmitted due to a request from the radio communication system and therefore refuses to assign a channel.
- connection setup signal REQ1 a Identifyingsin 'formation ID is included.
- the mobile station can then be localized as previously described for FIG. 1.
- no identification information ID is contained in the first connection setup signal REQ1.
- the virtual base station VBS sends a second and a third request AUF2, AUF3 to the mobile station MS, each of which contains the identification information ID of the mobile station MS is.
- the mobile station MS accordingly sends a second and a third connection setup signal REQ2, REQ3 on the random access channel R CH.
- the random access channel R ⁇ CH and thus also the three connection setup signals REQ1, REQ2, REQ3 are received by the virtual base station VBS in addition to the base station BS.
- the virtual base station VBS also receives connection setup signals REQMS1, REQMS2 from two further mobile stations MSI, MS2 on the random access channel R ⁇ CH.
- the other mobile stations MSI, MS2 do not send their connection setup signals REQMS1, REQMS2 on the basis of the requests AUF1, AUF2, AUF3 of the virtual base station VBS, but request for other reasons, for example on the basis of a connection request by the respective user of the others Mobile stations MSI, MS2, connect to the base station
- connection setup signals REQ1, REQ2, REQ3 can each be assigned to a request AUF1, AUF2, AUF3, the mobile station MS is located in the radio cell ZBS of the base station BS and in the radio area ZVBS of the virtual base station VBS.
- a more precise localization can in turn be carried out by means of a triangulation by several virtual base stations or by means of directional antennas.
- the radio communication system is thus only minimally loaded, namely by the connection setup signals and / or the request response signals. This load is considerably lower than, for example, in the method described in DE 199 20 222 AI.
- the mobile station MS After the mobile station MS has been located, the mobile station MS can be monitored using a virtual base station according to DE 199 20 222 AI using the method described there. Mobile stations, the identity of which, for example, their IMSI or IMEI, are already known, can thus be localized with the method according to the invention with a low network load and then intercepted.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/DE2003/002495 WO2005011317A1 (de) | 2003-07-24 | 2003-07-24 | Verfahren zum lokalisieren einer mobilen station eines funkkommunikationssystems sowie virtuelle basisstation |
DE10394313T DE10394313D2 (de) | 2003-07-24 | 2003-07-24 | Verfahren zum Lokalisieren einer mobilen Station eines Funkkommunikationssystems sowie virtuelle Basisstation |
AU2003264241A AU2003264241A1 (en) | 2003-07-24 | 2003-07-24 | Method for locating a mobile station of a radio communication system and virtual base station |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/DE2003/002495 WO2005011317A1 (de) | 2003-07-24 | 2003-07-24 | Verfahren zum lokalisieren einer mobilen station eines funkkommunikationssystems sowie virtuelle basisstation |
Publications (1)
Publication Number | Publication Date |
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WO2005011317A1 true WO2005011317A1 (de) | 2005-02-03 |
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ID=34085388
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Application Number | Title | Priority Date | Filing Date |
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PCT/DE2003/002495 WO2005011317A1 (de) | 2003-07-24 | 2003-07-24 | Verfahren zum lokalisieren einer mobilen station eines funkkommunikationssystems sowie virtuelle basisstation |
Country Status (3)
Country | Link |
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AU (1) | AU2003264241A1 (de) |
DE (1) | DE10394313D2 (de) |
WO (1) | WO2005011317A1 (de) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2007010220A2 (en) | 2005-07-22 | 2007-01-25 | M.M.I. Research Limited | Methods of setting up a call with, and determining the direction of, a mobile device |
DE102005034896A1 (de) * | 2005-07-26 | 2007-02-08 | Rohde & Schwarz Gmbh & Co. Kg | Verfahren zum Identifizieren und gegebenenfalls Abhören eines im Dual-Mode betreibbaren Mobiltelefons |
WO2010123655A1 (en) | 2009-04-22 | 2010-10-28 | Trueposition, Inc. | Network autonomous wireless location system |
US8200219B2 (en) | 2005-08-23 | 2012-06-12 | Thales Defence Deutschland Gmbh | Method and device for identifying a mobile terminal in a digital cellular mobile radio network |
US8284716B2 (en) | 2006-01-31 | 2012-10-09 | M.M.I. Research Limited | Methods of maintaining connection with, and determining the direction of, a mobile device |
US8838139B2 (en) | 1999-01-08 | 2014-09-16 | Trueposition, Inc. | Advanced triggers for location-based service applications in a wireless location system |
WO2020105025A1 (en) * | 2018-11-22 | 2020-05-28 | Elta Systems Ltd. | System, method and computer program product for direction finding and/or identification of geo-location, for mobile phones operating in lte (4g) |
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DE19920222A1 (de) * | 1999-05-03 | 2000-11-09 | Rohde & Schwarz | Verfahren zum Identifizieren des Benutzers eines Mobiltelefons oder zum Mithören der abgehenden Gespräche |
US20010009544A1 (en) * | 2000-01-26 | 2001-07-26 | Nokia Mobile Phones Ltd. | Location of subscriber terminal in packet-switched radio system |
DE10051129A1 (de) * | 2000-10-16 | 2002-04-18 | Rohde & Schwarz | Verfahren zum vom Besitzer unbemerkten Aktivieren eines Mobiltelefons |
US20020072376A1 (en) * | 2000-12-08 | 2002-06-13 | Hans Carlsson | Systems and methods for improving positioning in a communications network |
-
2003
- 2003-07-24 DE DE10394313T patent/DE10394313D2/de not_active Expired - Fee Related
- 2003-07-24 WO PCT/DE2003/002495 patent/WO2005011317A1/de active Application Filing
- 2003-07-24 AU AU2003264241A patent/AU2003264241A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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DE19920222A1 (de) * | 1999-05-03 | 2000-11-09 | Rohde & Schwarz | Verfahren zum Identifizieren des Benutzers eines Mobiltelefons oder zum Mithören der abgehenden Gespräche |
US20010009544A1 (en) * | 2000-01-26 | 2001-07-26 | Nokia Mobile Phones Ltd. | Location of subscriber terminal in packet-switched radio system |
DE10051129A1 (de) * | 2000-10-16 | 2002-04-18 | Rohde & Schwarz | Verfahren zum vom Besitzer unbemerkten Aktivieren eines Mobiltelefons |
US20020072376A1 (en) * | 2000-12-08 | 2002-06-13 | Hans Carlsson | Systems and methods for improving positioning in a communications network |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9288628B2 (en) | 1999-01-08 | 2016-03-15 | Trueposition, Inc. | Advanced triggers for location-based service applications in a wireless location system |
US8838139B2 (en) | 1999-01-08 | 2014-09-16 | Trueposition, Inc. | Advanced triggers for location-based service applications in a wireless location system |
WO2007010220A2 (en) | 2005-07-22 | 2007-01-25 | M.M.I. Research Limited | Methods of setting up a call with, and determining the direction of, a mobile device |
WO2007010220A3 (en) * | 2005-07-22 | 2007-04-12 | M M I Res Ltd | Methods of setting up a call with, and determining the direction of, a mobile device |
DE102005034896A1 (de) * | 2005-07-26 | 2007-02-08 | Rohde & Schwarz Gmbh & Co. Kg | Verfahren zum Identifizieren und gegebenenfalls Abhören eines im Dual-Mode betreibbaren Mobiltelefons |
DE102005034896B4 (de) * | 2005-07-26 | 2017-10-26 | Rohde & Schwarz Gmbh & Co. Kg | Verfahren zum Identifizieren und gegebenenfalls Abhören eines im Dual-Mode betreibbaren Mobiltelefons |
US8200219B2 (en) | 2005-08-23 | 2012-06-12 | Thales Defence Deutschland Gmbh | Method and device for identifying a mobile terminal in a digital cellular mobile radio network |
US8284716B2 (en) | 2006-01-31 | 2012-10-09 | M.M.I. Research Limited | Methods of maintaining connection with, and determining the direction of, a mobile device |
EP2422209A4 (de) * | 2009-04-22 | 2012-10-03 | Trueposition Inc | Netzautonomes drahtloses ortungssystem |
CN102405418A (zh) * | 2009-04-22 | 2012-04-04 | 真实定位公司 | 网络自主无线定位系统 |
EP2422209A1 (de) * | 2009-04-22 | 2012-02-29 | TruePosition, Inc. | Netzautonomes drahtloses ortungssystem |
WO2010123655A1 (en) | 2009-04-22 | 2010-10-28 | Trueposition, Inc. | Network autonomous wireless location system |
WO2020105025A1 (en) * | 2018-11-22 | 2020-05-28 | Elta Systems Ltd. | System, method and computer program product for direction finding and/or identification of geo-location, for mobile phones operating in lte (4g) |
IL263246A (en) * | 2018-11-22 | 2020-05-31 | Gershuni Yehonatan | System, method and product Computer software for finding direction and / or locating geo-location, for mobile phones that operate according to the LTTE standard - fourth generation |
Also Published As
Publication number | Publication date |
---|---|
AU2003264241A1 (en) | 2005-02-14 |
DE10394313D2 (de) | 2006-06-14 |
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