DE102009003540B4 - Method for determining the location of a femtocell - Google Patents

Method for determining the location of a femtocell

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Publication number
DE102009003540B4
DE102009003540B4 DE102009003540A DE102009003540A DE102009003540B4 DE 102009003540 B4 DE102009003540 B4 DE 102009003540B4 DE 102009003540 A DE102009003540 A DE 102009003540A DE 102009003540 A DE102009003540 A DE 102009003540A DE 102009003540 B4 DE102009003540 B4 DE 102009003540B4
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DE
Germany
Prior art keywords
mobile
femtocell
radio signal
station
location
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
DE102009003540A
Other languages
German (de)
Other versions
DE102009003540A1 (en
Inventor
Dipl.-Ing. Dieter (FH) Busch
Dipl.-Ing. Röbke Matthias
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Deutsche Telekom AG
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Deutsche Telekom AG
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Filing date
Publication date
Application filed by Deutsche Telekom AG filed Critical Deutsche Telekom AG
Priority to DE102009003540A priority Critical patent/DE102009003540B4/en
Publication of DE102009003540A1 publication Critical patent/DE102009003540A1/en
Application granted granted Critical
Publication of DE102009003540B4 publication Critical patent/DE102009003540B4/en
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Anticipated expiration legal-status Critical

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W64/00Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • H04W64/003Locating users or terminals or network equipment for network management purposes, e.g. mobility management locating network equipment
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO 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
    • G01S5/00Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/0009Transmission of position information to remote stations
    • G01S5/0018Transmission from mobile station to base station
    • G01S5/0036Transmission from mobile station to base station of measured values, i.e. measurement on mobile and position calculation on base station
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO 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
    • G01S5/00Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02Position-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
    • G01S5/0252Position-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 by comparing measured values with pre-stored measured or simulated values
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W84/00Network topologies
    • H04W84/02Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04Large scale networks; Deep hierarchical networks
    • H04W84/042Public Land Mobile systems, e.g. cellular systems
    • H04W84/045Public Land Mobile systems, e.g. cellular systems using private Base Stations, e.g. femto Base Stations, home Node B

Abstract

The invention relates to a method for determining the location of a femto cell (10), in which - a pilot radio signal (14) is emitted from a mobile radio station (12) in a frequency range below the frequency range used for mobile radio, - the pilot radio signal from a femto cell (10) 14) received and evaluated to determine the location of the femto cell, and - the determined location of the femto cell is transmitted from the femto cell (10) via a connection of the femto cell to a communication network (16) to control and monitoring entities (18) of a mobile radio provider.

Description

  • The invention relates to a method for determining the location of a femtocell according to claim 1
  • In mobile radio networks of the second (GSM) and third generation (UMTS) and of subsequent generations, radio cells are conventionally functional units which are operated by a provider of mobile radio services.
  • New operator concepts change this paradigm. Through the introduction of micro-cells, the so-called femto cells, it is conceivable that a private radio cell is operated by the customer of the mobile operator. The femtocell is provided by a small transceiver that allows cellular connections in the femtocell. In the following, the term femtocell is equated with a transmitting and receiving system.
  • A characteristic feature of a femtocell is determined primarily by the emitted transmission power, which significantly influences the size of the mobile-supplied cell. Restrictions on the allowed users in the cell are also possible.
  • A femtocell is additionally integrated into a public mobile network. The connection to the network of a mobile operator takes place, in particular, via a broadband network connection with the corresponding control and control entities of the mobile operator so that the user of mobile services experiences the same network quality in the field of femtocell care, as he is used to from the superordinate "macro network" of the provider ,
  • For regulatory reasons as well as for network economy and security reasons, it is imperative that the mobile network operator has precise knowledge of the location of the femtocell. Furthermore, it is necessary, for example, in emergency calls to limit the whereabouts of the caller.
  • One way to determine the location of a femtocell is to detect surrounding macrocells of the mobile operator, whose identifier could approximate an approximate position determination. However, this procedure can only be applied in areas where radio coverage is provided via the macro network. A supply of currently unavailable areas is therefore not possible. WO 2008/051124 A1 . US 2008/0211431 A1 and US 200/0293433 A1 describe the location of a femtocell based on radio signals from base stations of the macrocells of a mobile network.
  • Another possibility is to determine the location of the femtocell by determining the physical broadband connection of the user or operator of a femtocell. However, this can be easily circumvented by the user first directing the data streams from the femtocell to his home network and from there to the Internet. Since the establishment of a connection to the control and monitoring bodies of the mobile service provider then runs on the IP address of the broadband connection, this receives a false or inaccurate location information.
  • Object of the present invention is therefore to improve the location of a femtocell especially in areas where the radio coverage by macro cells of a mobile network is poor or not available, and therefore a location determination by detection of surrounding macrocells too inaccurate or not at all possible.
  • This object is achieved by a method for determining the location of a femtocell having the features of claim 1. Further embodiments of the invention will become apparent from the dependent claims.
  • An essential idea of the invention is to introduce a pilot radio signal, which lies in a lower frequency band, in order to ensure the highest possible range and good penetration of buildings, for determining the location of femtocells. The frequency range in which the pilot radio signal is emitted is selected such that the pilot radio signal has a higher range than conventional mobile radio signals, for example GSM mobile radio signals, and can also be better received in buildings than mobile radio signals. In particular, the frequency range of the pilot radio signal is below the frequency range of GSM850 or GSM900. The pilot radio signal can be emitted by existing mobile radio stations and received by a femtocell and evaluated.
  • An embodiment of the invention now relates to a method for determining the location of a femtocell, in which
    • A pilot radio signal is emitted by a mobile radio station in a frequency range lying below mobile frequency ranges,
    • The pilot radio signal is received by a femtocell and evaluated by the femtocell, and
    • - From the femtocell the determined location of the femtocell is transmitted via a connection of the femtocell to a communication network to control and monitoring bodies of a mobile operator. The connection to the communication network can in particular be a broadband network connection.
  • The mobile radio station can encode information about the mobile radio station radiating the pilot radio signal into the radiated pilot radio signal. The granularity of the information contained in the pilot radio signal may in particular vary depending on the requirement. So it is z. B. conceivable that only a country code, a country code and the identifier of the operator or the exact coordinates of the sending cell including country and operator identifier, transmitted. In particular, the information may include one or more of the following information:
    • An identifier of the mobile station;
    • A location of the mobile station;
    • A country code of the mobile station;
    • An identifier of the operator of the mobile station;
    • - exact coordinates of the mobile station.
  • The mobile station can also encode cryptographically encoded information in the pilot radio signal, so that only authorized receiver can decrypt the information contained in the pilot radio signal, for example, customers of the mobile operator. A femtocell, which receives the pilot radio signal, can decrypt it and transmit the information received by the pilot radio signal via its connection to the network of the mobile service provider, in particular via an existing broadband connection to the control and monitoring bodies of the mobile service provider.
  • In the case of the mobile service provider, the location obtained from the pilot radio signal by the femtocell and transmitted to the control and monitoring bodies of the mobile radio service provider may possibly be correlated with further data in order to achieve a better spatial resolution.
  • The control and monitoring bodies of the mobile operator can compare the transmitted from the femtocell location with a deposited with the mobile operator location of the femtocell and cause the comparison of the transmission of a release signal to the femtocell, and the femtocell can receive the mobile phone within the supplied by the Activate femtocell covered area. For example, it can be checked whether the location stored for the corresponding femtocell with the mobile service provider matches the location transmitted by the femtocell. If there is a match, the authorization may be transmitted by the corresponding control and monitoring bodies of the mobile service provider to the femtocell to act as an active mobile radio cell, for example by the active radio part of the femtocell being switched on only after receiving this permission, and then only then be active part of the mobile service. If the acknowledgment of the control and monitoring bodies of the mobile service provider negative, for example, because a feedback from a femtocell fails or from a femtocell no pilot radio signal can be received, however, can be provided that the femtocell can not be activated at all.
  • In order to ensure that an active femtocell can change its location, it can be provided that the method according to the invention for determining the position is cyclically repeated, ie in particular a femtocell cyclically evaluates a received pilot radio signal, and the information obtained with the received pilot radio signal is sent cyclically to the control unit. and control bodies of the mobile operator can transmit.
  • According to a further embodiment of the invention, a femtocell is provided, which is designed for use with a method according to the invention and is further formed
    • For receiving a pilot radio signal which is radiated by a mobile radio station in a frequency range lying below mobile frequency ranges,
    • - To evaluate the received pilot radio signal to determine the location of the femtocell, and
    • - For transmitting their determined location via a connection to a communication network to control and monitoring bodies of a mobile operator.
  • Furthermore, an embodiment of the invention relates to a mobile radio station, which is designed for use with a method according to the invention and is further configured for emitting a pilot radio signal in a frequency range lying below mobile frequency ranges.
  • The mobile radio station may further be configured to encode information in the radiated pilot radio signal, the information in particular having one or more of the following information:
    • An identifier of the mobile station;
    • A location of the mobile station;
    • A country code of the mobile station;
    • An identifier of the operator of the mobile station;
    • - exact coordinates of the mobile station.
  • Furthermore, the mobile station can be configured to encode cryptographically encrypted information in the pilot radio signal.
  • Further advantages and possible applications of the present invention will become apparent from the following description in conjunction with the embodiment shown in the drawing.
  • In the description, in the claims, in the abstract and in the drawing, the terms and associated reference numerals used in the list of reference numerals recited below are used.
  • The drawings show in the only figure a mobile radio system with a femtocell, which is set up to determine the location of the femtocell according to the invention.
  • In the figure is a femtocell 10 for example, arranged in a private home and via a broadband connection to the communication network 18 connected to a telecommunications network operator. The communication network 18 has control and monitoring bodies 18 of a mobile service provider operating a mobile network. The mobile network provides by means of mobile stations 12 a mobile service for customers of the mobile operator available. For this purpose, each mobile station 12 a cellular radio cover 20 on, within a mobile reception, ie a mobile communication between, for example, a mobile phone and the mobile station is guaranteed. The extent of radio coverage depends on various parameters such as the maximum transmit power of a mobile phone and the mobile station 12 and the frequency range used for mobile communication. Since in particular in the conventional mobile radio standards such as GSM and UMTS, the frequency ranges used are in upper ranges of the radio spectrum intended for mobile radio communication, the range is limited. In addition, a greater attenuation occurs in particular by reinforced concrete and other radio-damping obstacles, the higher the frequency ranges used. The frequency range used for UMTS and above the frequency range for GSM is therefore subject to greater attenuation than GSM mobile radio signals. UMTS mobile is therefore tends to receive less in buildings than GSM mobile. To compensate for this disadvantage, femtocells can be used, in particular, in buildings, which can ensure a mobile radio coverage in a small and limited area compared to the radio coverage of a mobile radio station. In the figure, the radio coverage of the femtocell is 10 with as smaller and with the reference numeral 24 provided circle exemplified.
  • The commissioning of the mobile phone supply by the femtocell 10 For the reasons mentioned above, this is only possible with a precise knowledge of the location of the femtocell 10 allowed and therefore is over the control and monitoring bodies 16 controlled and controlled by the mobile operator. In the case shown in the figure, the femtocell is located 10 outside the radio coverage 20 through the mobile station 12 , so that a location by the mobile signals of the mobile station 12 not possible. Therefore, the mobile station radiates 12 a pilot radio signal 14 with a greater range than the mobile signals. To enable this lies the pilot radio signal 14 below that for mobile by the mobile station 12 used frequency ranges. In other words, the pilot radio signal 14 longer wavelength than the mobile signals and therefore has a greater range and higher penetration of buildings, making it even from the femtocell 10 can be received within the radio range 22 of the pilot radio signal 14 lies.
  • In the pilot radio signal 14 encodes the radiating mobile station 12 an identifier of the operating mobile service provider, a country code and their exact coordinates in encrypted form. The femto cell decrypts and decodes those in the received pilot radio signal 14 contained information and evaluated the location information. The evaluation can be done in a simple forwarding of the decoded information to the control and monitoring bodies 16 of the mobile service provider, but may continue. For example, the femtocell can be based on the reception field strength of the pilot radio signal 14 and the received coordinates mobile station 12 perform a first coarser location determination. The location thus determined can be the femtocell 10 in particular, together with a unique identification of the femtocell and possibly further data such as, for example, the reception field strength and reception time via its broadband connection and the communication network 18 to the tax and supervisory authorities 16 of the mobile operator.
  • The controlling and controlling bodies 18 of the mobile service provider correlate with those of the femtocell 10 received location with additional data to improve the spatial resolution of the femtocell 10 and possibly evaluate the other received data in order to achieve a more accurate location. The received and possibly improved location of the femtocell 10 can then by the control and monitoring bodies 16 stored in a database of locations of active femtocells with the mobile service provider. Subsequently, the control and monitoring bodies 16 Enable the operation of the femtocell by sending a release signal to the femtocell 10 cause, for example via the communication network 18 or encodes and encodes in the pilot radio signal 14 that from the mobile station 12 is emitted. Upon receipt of the enable signal, the femto cell 10 then the mobile coverage within the area covered by the femtocell 24 , ie activate in the private house.
  • If the operation of the femtocell is to be allowed only in a certain area, the received and possibly improved location of the femtocell can 10 also by the tax and supervisory authorities 16 with a location of the femtocell deposited with the mobile operator 10 be compared. For example, it may be provided that the femtocell may only be operated in the private home or in the immediate vicinity of the private home of the owner of the femtocell. In order to ensure this operational limitation, therefore, the coordinates of the private house are stored in a database of the mobile operator. Now the comparison shows that of the femtocell 10 received and possibly improved location corresponds approximately to the location that is deposited with the mobile operator, the control and monitoring bodies 16 the transmission of the enable signal to the femtocell 10 so that the femtocell can pick up the mobile phone coverage.
  • With the invention, the location of a femtocell and in particular the release of the operation of a femtocell can be improved by a mobile operator, especially in areas that are undersupplied with mobile.
  • LIST OF REFERENCE NUMBERS
  • 10
    femtocell
    12
    mobile station
    14
    Pilot radio signal
    16
    Control and monitoring bodies of the mobile service provider
    18
    communication network
    20
    Radio coverage of the mobile station with mobile signals
    22
    Radio range of pilot radio signals
    24
    Radio coverage of the femtocell 10 with mobile radio signals

Claims (11)

  1. Method for determining the location of a femtocell ( 10 ), in which - by a mobile radio station ( 12 ) a pilot radio signal ( 14 ) is emitted in a frequency range lying below mobile frequency ranges, - by a femtocell ( 10 ) the pilot radio signal ( 14 ) and is evaluated by the femtocell to determine its position, and - by the femtocell ( 10 ) the determined location of the femtocell via a connection of the femtocell to a communication network ( 16 ) to tax and supervisory authorities ( 18 ) is transmitted to a mobile operator.
  2. Method according to Claim 1, characterized in that the mobile radio station ( 12 ) into the radiated pilot radio signal ( 14 ) Encodes information about the mobile radio station radiating the pilot radio signal.
  3. Method according to claim 2, characterized in that the information has one or more of the following information: An identifier of the mobile station; A location of the mobile station; A country code of the mobile station; An identifier of the operator of the mobile station; - exact coordinates of the mobile station.
  4. Method according to Claim 2 or 3, characterized in that the mobile radio station encodes information cryptographically encrypted into the pilot radio signal.
  5. Method according to one of Claims 1 to 4, characterized in that the control and monitoring bodies ( 18 ) of the mobile service provider from the femtocell ( 10 ) correlated location with other data to improve the spatial resolution.
  6. Method according to one of the preceding claims, characterized in that the control and monitoring bodies ( 18 ) of the mobile service provider from the femtocell ( 10 ), and depending on the comparison, cause the transmission of a release signal to the femtocell, and the femtocell, upon receiving the release signal, activates the mobile coverage within the range covered by the femtocell.
  7. Method according to one of the preceding claims, characterized in that it is repeated cyclically.
  8. Femtocell ( 10 ), which is designed for use with a method according to one of the preceding claims and is further configured - for receiving a pilot radio signal which is emitted by a mobile radio station in a frequency range lying below mobile frequency ranges, - To evaluate the received pilot radio signal to determine the position of the femtocell, and - To transmit their determined location via a connection to a communication network to control and monitoring bodies of a mobile operator.
  9. Mobile radio station ( 10 ), which is designed for use with a method according to one of claims 1 to 7 and is further configured for emitting a pilot radio signal in a frequency range lying below mobile frequency ranges.
  10. The mobile station of claim 9, further configured to encode information into the radiated pilot radio signal, the information including, in particular, one or more of the following information: An identifier of the mobile station; A location of the mobile station; A country code of the mobile station; An identifier of the operator of the mobile station; - exact coordinates of the mobile station.
  11. Mobile radio station according to claim 9 or 10, which is further adapted to encrypt information cryptographically encrypted in the pilot radio signal.
DE102009003540A 2009-02-26 2009-02-26 Method for determining the location of a femtocell Active DE102009003540B4 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE102009003540A DE102009003540B4 (en) 2009-02-26 2009-02-26 Method for determining the location of a femtocell

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009003540A DE102009003540B4 (en) 2009-02-26 2009-02-26 Method for determining the location of a femtocell
PCT/DE2009/001807 WO2010097063A2 (en) 2009-02-26 2009-12-23 Method for determining the position of a femtocell

Publications (2)

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DE102009003540A1 DE102009003540A1 (en) 2010-09-09
DE102009003540B4 true DE102009003540B4 (en) 2011-12-01

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WO (1) WO2010097063A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009003662B4 (en) * 2009-03-23 2013-12-05 Deutsche Telekom Ag Method for determining the location of a femtocell
US8825077B2 (en) 2012-01-27 2014-09-02 Qualcomm Incorporated Method and system for femtocell positioning

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060211431A1 (en) * 2005-03-15 2006-09-21 Nextel Communications, Inc. System and method for determining a base transceiver station location
WO2008051124A1 (en) * 2006-10-27 2008-05-02 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for estimating a position of an access point in a wireless communications network
US20080293433A1 (en) * 2007-05-22 2008-11-27 Mavenir Systems, Inc. Discovering cellular network elements

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8483719B2 (en) * 2007-06-01 2013-07-09 Qualcomm Incorporated Methods and apparatus for determining FEMTO base station location
WO2008157841A1 (en) * 2007-06-21 2008-12-24 Qualcomm Incorporated Method and apparatus for determining the position of a base station in a cellular communication network

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060211431A1 (en) * 2005-03-15 2006-09-21 Nextel Communications, Inc. System and method for determining a base transceiver station location
WO2008051124A1 (en) * 2006-10-27 2008-05-02 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for estimating a position of an access point in a wireless communications network
US20080293433A1 (en) * 2007-05-22 2008-11-27 Mavenir Systems, Inc. Discovering cellular network elements

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Publication number Publication date
DE102009003540A1 (en) 2010-09-09
WO2010097063A3 (en) 2010-11-11
WO2010097063A2 (en) 2010-09-02

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