CN102438309B - Use the reliable location information of the movement station of non-GPS location technology - Google Patents

Abstract

The present invention describes the reliable location information of the movement station using non-GPS location technology.A kind of method and apparatus determines that the location fix that movement station uses non-GPS location technology to receive is the most accurate.If the position result using one or more non-GPS location technologies to obtain is verified as within the error margin that the trustworthy location information source from such as GPS alignment system etc obtains, then they are by as treating accurately.Non-GPS position information can obtain from the signal of Base Transmitter, and this signal includes base station location.Non-GPS position information also can obtain from the back-end services being associated with the wireless network including base station.

Description

Use the reliable location information of the movement station of non-GPS location technology

Technical field

The present invention relates to communication technology, particularly relate to location technology.

Background technology

Mobile phone and other kinds of mobile communication station include being designed to promoting the complicated of Consumer's Experience Hardware and software.One of more recent feature being integrated in mobile phone is location technology.The such as whole world The mobile positioning technique of alignment system (GPS) and non-GPS location technology etc. is it should be understood that phone is current Communication is set up, to allow user to determine his or her current location in the base station towers used or the position of antenna. Resident application program on a cellular telephone can provide the various location Based service using this location information.

The problem produced when using non-GPS location technology is that they are the most accurate or up-to-date.Additionally, Their accuracy typically be inferior to use GPS location technology can accuracy.

Summary of the invention

In one implementation, it is provided that one is used for determining that movement station uses non-GPS location technology to receive Location fix method and apparatus the most accurately.If using one or more non-GPS location technologies to obtain Position result be verified as obtaining in the trustworthy location information source from such as GPS alignment system etc Within error margin, then they are by as treating accurately.Non-GPS position information can be from Base Transmitter Signal in obtain, this signal includes the aerial position of corresponding base station.Non-GPS position information also may be used Obtain from the back-end services being associated with the wireless network including base station antenna positions.

In a further implementation, the error margin being associated with non-GPS location technology can use GPS by setting up Location technology obtain threshold value and be gradually lowered.Such as, if location fix and movement station receive from it position The position of the antenna for base station in orientation is corresponding, then error margin typically by with the maximum possible scope of base station or cover Cover region territory is corresponding.Sometimes this is referred to as effective antenna range.This error margin can be by from GPS location Determining in orientation that the actual range of base station reduces, described GPS location orientation is the reality of base station over time A large amount of movement stations of movement in overlay area, border and obtain.Because in practical operation, the actual of base station is covered Cover region territory is generally less than (determined by the particular technology used) its maximum possible overlay area, therefore Error margin can reduce a great deal of.

Accompanying drawing explanation

Fig. 1 illustrates an example of wireless communication system, and wherein movement station (MS) can be with a series of base stations Set up communication.

Fig. 2 illustrates a certain illustrative architecture of the principal functional components of mobile communication equipment.

Fig. 3 is to illustrate that MS can determine its substantially position from the broadcast singal (commonly referred to as beacon) of base station The message of the method for the base station antenna positions information being stored in its local cache is further acknowledged that while putting Flow chart.

Fig. 4 is to illustrate that MS can be in the information obtained from the broadcast singal of base station with its local cache Its approximate location is determined (because local cache is empty) in the case of base station position information is unmatched The message flow chart of method.

Fig. 5 is to illustrate that MS determines it in the case of its local cache or back-end data base are the most disabled The message flow chart of the method for approximate location.

Fig. 6 be illustrate MS in its approximate location from the most disabled feelings of local cache or back-end data base The message flow chart of the other method of its approximate location is determined under condition.

Fig. 7 illustrate wherein positional information from local cache and GPS system both can message stream Cheng Tu.

Fig. 8 illustrate wherein positional information from local cache and GPS both can another message stream Cheng Tu.

Fig. 9 illustrates a series of concentric circular, and these concentric circulars represent the overlay area of base station at its center.

Detailed description of the invention

Fig. 1 illustrates the rough schematic view of cordless communication network, and this cordless communication network can carry to wireless mobile For location or positional information.The example of such cordless communication network include wireless wide area network (WWAN), WLAN (WLAN), wireless personal domain network (WPAN) etc..Term " network " and " be System " can be employed interchangeably in this article.WWAN can be CDMA (CDMA) network, time Divide multiple access (TDMA) network, frequency division multiple access (FDMA) network, OFDM (OFDMA) Network, single-carrier frequency division multiple access (SC-FDMA) network etc..Cdma network can realize such as, only For the example of several radiotechnics, cdma2000, wideband CDMA (W-CDMA) etc. are a kind of or many Plant radio access technologies (RAT).Herein, cdma2000 can include according to IS-95, IS-2000 and The technology of IS-856 standard implementation.TDMA network can realize global system for mobile communications (GSM), Digital advanced mobile phone system (D-AMPS) or other certain RAT.GSM and W-CDMA exists Described in document from the alliance of entitled " third generation partnership projects " (3GPP).Cdma2000 from Described in the document of the alliance of entitled " third generation partnership projects 2 " (3GPP2), 3GPP and 3GPP2 Document is publicly available.WLAN can include IEEE 802.11x network, and WPAN can include example Such as blueteeth network, IEEE 802.15x.Method shown herein and technology can be additionally used in WWAN, WLAN And/or the combination in any of WPAN.

Movement station (MS) 110 shown in Fig. 1 can be can be any with what cordless communication network communicated Entity, it can be operated by such as Wireless Service Provider.Such MS can include, names a few, Cell phone, personal digital assistant (PDA) or notebook.MS 110 can be with any amount Base station communication, all cellular basestations 160 as shown in Figure 1.Each base station can be each overlay area or honeybee Nest provides communication.Term " honeycomb " can refer to base station and/or its overlay area.For improving power system capacity, base station Overlay area be divided into each sector.Term used herein " base station " can refer to serve community Base station and/or serve the base station of sector.Term " base station " typically may further be used to refer to other kinds of wireless Similar devices in network.Such as, in the context of IEEE 802.11x network, base station is corresponding to wireless Access point.

MS 110 can be enabled and receive beacon or pilot signal 120 from cellular basestation 160.Such pilot tone Signal is well known in the art, and can be specified by such as IS-95A, IS 2000 and J-STD-008. Cellular basestation 160 can include CDMA (CDMA) radio access network (RAN).Can as by The pilot signal of the carrier wave of pseudo noise (PN) sequence modulation can be used for, and names a few, time synchronized, Switching between cellular basestation and the offer of coherent reference.The broadcast that is employed interchangeably in this article, Pilot signal or beacon can include system parameters message (SPM).

Such SPM can include the information about cellular basestation, and described cellular basestation is all as shown in Figure 1 Cellular basestation 160.Such as, SPM can include the base station IDs that can uniquely identify cellular basestation and antenna thereof (BSID).SPM may also include the position side of the position of the position of specific base, especially antenna for base station Position.Location fix can provide geography information, such as latitude and longitude, geographical map and/or can pass on base station The location of antenna and/or any information of position.Location fix can include relative position information, and wherein position is There is provided relative to another location, such as, name a few, terrestrial reference, region, market, cell tower, Airport, the second movement station and the position of previous location fix.

MS 110 can include extracting BSID and position from the pilot signal that cellular-specific base station receives from it The application program in orientation.Because pilot tone or beacon signal can provide the cellular basestation sky that MS is communicating with The position of line, so the position of MS can be determined to be in " honeycomb " of this cellular basestation.That is, MS Position can be known to a certain place in the overlay area of this cellular basestation, it is referred to alternatively as error Surplus.Determine that the accuracy of this method of substantially MS position can rely partially on cell size and i.e. cover Region, such as, can change between radius two kilometers to 35 kilometers.Thus, GPS location is lacked The MS of ability at least still can use pilot tone or beacon within uncertainty limited defined in error margin Signal determines its position.If MS changes position thus it begins to use a different cellular basestation, The pilot tone then received or beacon signal, can correspondingly change including SPM.New SPM can include New BSID and location fix.In this way, its position can be defined as in new cellular basestation sky by MS Within the community of line.

Movement station also can obtain its geographical position from back-end server 180 and the data base being associated 130 thereof, This back-end server and data base can be safeguarded by the Wireless Service Provider such as operating wireless network.Rear end The BSID of base station can be associated by data base with their each geographical position.Thus, MS can by from Pilot tone or beacon signal extracted BSID and this information extracted is sent to back-end server 180, coming Determine location fix.Look-up table etc. in server 180 accessible database 130 finds the corresponding of base station Position.Base station location can be sent back MS by server 180 subsequently.Again, determined by, position is permissible It is the position of base station, but MS can be assumed relative close, at least within " community " of base station.

MS 110 can be by the wireless path 140 shown in Fig. 1 and back-end data base communication.Base station 150 is also Can be come and rear end via the communication network of the most such as the Internet 170 etc by wiredly and/or wirelessly path Server 180 communicates.

In some cases, MS pilot tone or beacon signal from base station and/or obtain from back-end data base 130 Positional information may not the most accurately or up-to-date.In this case, the position that MS is extracted Information will be wrong.But, movement station is equipped with global location transceiver, the described whole world increasingly commonly Location transceiver can use GPS satellite navigation system to detect the position of equipment to high accuracy.General and Speech, GPS system can position movement with than the higher accuracy originally obtained from cordless communication network itself The position of equipment.Thus, GPS position information can come as authoritative or trusted position information source right Treat, and therefore it can be used for confirming, correct and update the back-end services from wireless communication system when necessary The positional information that device 180 obtains.

Fig. 2 illustrates the one of the principal functional components of the mobile communication equipment of the arrangement that can be used to be easy to the present invention Individual certain illustrative architecture 200.Although the architecture shown in Fig. 2 200 is particularly suitable movement Phone, but the ultimate principle shown in it can be expected to other platforms such as, such as, PC, net book etc., There is general applicability.In this exemplary embodiment, architecture 200 provides UI 220 to support to use Family interactivity also facilitates effective Consumer's Experience, and will be typically embodied as graphic user interface.Respectively Planting application program and reside on MS, these application programs can be indicated collectively by label 225.Reside in MS On some application program the location Based service needing MS to determine its position can be provided.Such base Service in position can be by integrated with other information to the location of mobile device or position thus provide a user with attached Add value.The example of such application program includes map application, traffic alerts application program, geography Tag application program (such as, carrying out the image of this record of label with the position of image of record) and for user Other application programs in place (such as, dining room, shop) interested near mark.

Application program 225 in support system structure 200 be operating system 230, position ccf layer 235, Radio interface layer (RIL) 240 and hardware layer 235.In this exemplary embodiment, operating system 230 It is particularly suited on the equipment of resource-constrained operation, and can include, such as, Android.Position framework Layer 235 provides and catches the positional information obtained from hardware layer 245 and make this information for needing this information Any application program 225 can logic and control function.RIL layer 240 is to provide the nothing on mobile phone One group of API of the abstraction level between line electricity and the software of mobile phone.That is, RIL layer 240 is used as hardware Adaptation layer, i.e. by the layer of the details of specific mobile system/hardware Yu most software isolation of system.With this Mode, various software solutions are applicable to multiple different mobile system and radio.

Hardware layer 235 provides physical hardware abstract realized on MS, and is typically included processor (such as central processing unit is i.e. " CPU "), such as read only memory (" ROM ") and random access memory are deposited The system storages such as reservoir (" RAM "), bus structures, peripheral system, driver, display device, User control and interface etc..Hardware may also include for storing computer executable instructions (that is, code) Storage medium, including any one in removable medium and irremovable medium or both, such as magnetic and light Learn medium, solid-state memory and other conventional media.Above-mentioned physical hardware components is not shown in layer 235 Go out because they be currently discussed unrelated.But, following nextport hardware component NextPort it is shown in fig. 2, because they Relevant with discussion below.

Specifically, the hardware layer 235 of MS includes wireless radio 250, GPS 255 and high speed Caching 260.Wireless radio 250 allows MS and wireless communication.Radio 250 includes such as sending out Penetrate the general components of machine, receiver, antenna etc..GPS positioning circuit 255 passes through gps antenna from GPS Satellite navigation system receives signal to determine the position of MS.Cache 260 be used especially for store about The cellular basestation ID (BSID) of each cellular basestation that MS has been in communication with and their corresponding positions Information.Therefore, the information that cache 260 can include being positioned in the back-end data base 130 shown in Fig. 1 Subset.In this way, MS need not when the positional information that every time it goes for about base station just and rear end Data base 130 exchanges message.

Generally use two kinds of methods to come from gps satellite and receive gps signal.General use in conventional terminal A kind of method be independent GPS, this independent GPS use the GPS chip group that is placed on terminating circuit and Module calculates gps satellite track and to the pseudo-distance of satellite and is not appointing with external assistance server exchange The position of object terminal is determined in the case of what information.Another kind of method is recently as providing accurate location Attractive option and assistant GPS (" the AGPS ") method that catches on.AGPS uses mobile Network reduces common GPS and receives the initialization time needed for navigation data.In AGPS, MS will be supplied to about the information of satellite orbit and the mistake of base station prior metric by means of communication.Dispose GPS chip group or module in the terminal use the data received from base station and distance GPS calculated The pseudo-distance of satellite, determines the position of terminal at short notice.

Fig. 3 is to illustrate that MS can further acknowledge that storage while determining its approximate location from the pilot signal of base station The message flow chart of the method for the base station position information in its local cache.As indicated by message 1, Reside in the application program 225 on MS and ask current location or the orientation of MS.Application program can be to appoint What location Based service application program, such as above those examples discussed as explanation.Request is sent out Deliver to the position ccf layer 235 in MS.As response, position ccf layer 235 is by message (message 2) It is sent to RIL layer 240, RIL layer 240 and then issue an instruction to ask to radio 250 to home base stations Positional information, MS currently passes through home base stations and communicates with wireless network.Specifically, radio 250 Obtain from pilot signal base station ID (such as, in the case of cellular network, be community ID and at IEEE It is MAC Address in the case of 802.11x network) and position, such as its latitude and longitude.Receiving After positional information, RIL layer 240 forwards it to position ccf layer 235 (message 3).Position framework Layer 235 generates the local cache 260 asking (message 4) to search for MS and determines if to comprise The positional information being associated with the base station IDs received from home base stations.If this information can be used, then by its with The positional information obtained from pilot signal compares.If the positional information coupling obtained from two sources, then Send an acknowledgment to position ccf layer 235 (message 5), position ccf layer 235 and then provide information to Application program 225 (message 6).

Fig. 4 is to illustrate that MS can be in the information obtained from the pilot signal of base station with its local cache Its approximate location is determined (because local cache is empty) in the case of base station position information is unmatched The message flow chart of method.Message 1-4 is identical with discuss above in association with Fig. 3.But in this case, Local cache notice position ccf layer 235 (message 5) it be not associated with this certain base station ID Any positional information.As response, position ccf layer 235 sets up, with back-end server 180, the (message that communicates 6) and ask it to search for its data base 130 (message 7) with obtain be associated with this base station IDs times What available position information.Positional information is sent to back-end server 180 (message 8) by data base 130, Back-end server 180 and then forward it to the position ccf layer 235 (message 9) in MS.Position frame Positional information is sent to application program (message 10) and local cache (message by rack-layer 235 subsequently 11), this message is available for quoting use in the future there.

Fig. 5 is to illustrate that MS is true in the case of its local cache or back-end data base 130 are the most disabled The message flow chart of the method for its approximate location fixed.Message 1-7 is identical with discuss above in association with Fig. 4.So And in this case, data base 130 notifies that the positional information of this base station of back-end server 180 is unavailable and (disappears Breath 8).Thus, back-end server 180 use base station can positional information (and in message 3 pass Pass the message of position ccf layer 235) and forward it to (message 9) on position ccf layer 235.? After, base station position information is transmitted to application program 225 (message 10) by position ccf layer 235.

Fig. 6 is to illustrate that MS is the most unavailable from local cache or back-end data base 130 in its approximate location In the case of determine the message flow chart of other method of its approximate location.But in this case, position Information obtains from base station pilot signals and GPS navigation system only.As indicated by message 1, reside in Application program 225 on MS asks current location or the orientation of MS.The position that request is sent in MS Put ccf layer 235.As response, message (message 2) is sent to RIL layer 240 by position ccf layer 235, RIL layer 240 and then issue an instruction to home base stations request position information to radio 250, MS is current Pass through home base stations to communicate with wireless network.Position ccf layer 235 also asks GPS circuitry 225 Obtain the position (message 3) of MS.In response to the request to RIL layer 240, radio 250 is from leading Frequently signal obtains base station ID (such as, in the case of cellular network, be community ID and at IEEE It is MAC Address in the case of 802.11x network) and position, such as its latitude and longitude.Receiving After positional information, RIL layer 240 transfers it to (message 4) on position ccf layer 235.Position frame Rack-layer 235 generates the local cache 260 asking (message 5) to search for MS and determines if bag Containing the positional information being associated with the base station IDs received from home base stations.Local cache notice position frame Rack-layer 235 (message 6) it not there is any positional information being associated with this certain base station ID, such as community ID or MAC Address.As response, position ccf layer 235 is set up to communicate with back-end server 180 and (is disappeared Breath 7) and ask it to be associated with this base station IDs to the data base 130 (message 8) searching for it with acquisition Any available position information.Data base 130 notifies that the positional information of this base station of back-end server 180 is unavailable (message 9).Thus, back-end server 180 use base station can positional information (and in message 4 In pass to the message of position ccf layer 235) and transfer it to (message 10) on position ccf layer 235. As a part for AGPS process, position ccf layer 235 and then positional information is transmitted to GPS receiver Machine 255 (message 11).From GPS satellite navigation system, (it has ratio from base station to GPS 255 The higher accuracy of positional information obtained) obtain positional information and forward it to position ccf layer 235 and (disappear Breath 12).Position ccf layer 235 and then GPS position information is transmitted to application program (message 13). Position ccf layer 235 also GPS position information is transmitted to local cache 260 so that it be available for by Quote (message 14) and be transmitted to back-end server 180 (message 15), back-end server 180 And then forward it to data base 130 (message 16).

Fig. 7 illustrate wherein positional information from local cache 260 and GPS 255 both can message Flow chart.Message 1-5 is identical with combine Fig. 6 discussion.But in this case, local cache 260 positional informationes not comprising the home base stations that MS is just being in communication with, this information is provided to position Ccf layer 235 (message 6).This information and the positional information obtained from the pilot signal of base station offer Join.As a part for AGPS process, positional information is then transmitted to GPS by position ccf layer 235 Receiver 255 (message 7).From GPS satellite navigation system, (it is considered to have GPS 255 The higher accuracy of positional information than obtaining from base station) obtain positional information and forward it to position framework Layer 235 (message 8).Position ccf layer 235 so by GPS position information and associated there accurately Property is transmitted to application program (message 9).In this example, the positional information that local cache is reported Error or the uncertain accuracy reported more than GPS system (such as, local cache is reported The error accused can be 400m and error that GPS system is reported can be 300m).Because trusted Position information source (GPS system) there is higher accuracy as expected, therefore need not take other move Make.

Fig. 8 illustrate wherein positional information from local cache 260 and GPS 255 both can another Message flow chart.Message 1-9 is identical with combine Fig. 7 discussion.But in this case, local high speed The accuracy that the error that caching 260 is reported is reported less than GPS system, this indicates local cache Data in 260 are probably mistake.Thus, position ccf layer 235 sends to local cache 260 Instruction GPS position information replaces its current location information (message 10).Position ccf layer 235 is also Backend service device issues an instruction to update its rear end data base (message 11) by GPS information, and rear end takes Business device does so (message 12) subsequently.

Available except using GPS system to update in back-end data base 130 and/or local cache 260 Positional information, the position letter that GPS system can be used to reduce back-end server and/or pilot signal is provided Breath error margin.As it was earlier mentioned, the error margin being associated with positional information is initially assumed equal to base The maximal cover region stood.The position that this error margin can provide jointly at the movement station being equipped with GPS by many Reducing with the help of confidence breath, these movement stations are set up with each base station over time and are communicated.This process can It is described with reference to Figure 9.

Fig. 9 is shown at the overlay area of the base station of concentric circular central authorities.The radius of outermost circle represents initial Error margin.That is, receive when the MS communicated with the base station pilot signal from base station or its rear end server During positional information, its physical location is only considered by region defined in outer layer diameter of a circle.Along with respectively Planting movement station to communicate with the foundation of this base station, they will report them to the back-end server being associated with this base station Respective GPS position information, the error reported at back-end server the most in fig. 8 is less than GPS system In the case of the accuracy that system is reported, there is error in these instruction data.Elapsing over time, rear end takes Business device can find that it does not receives any GPS from by region defined in circle less defined in error margin Positional information.In fig .9, the diameter having as represented by threshold value t1 that this is less.

Once back-end server statistically a large amount of movement stations receive GPS position information and determine it not from Be positioned at from base station more than t1 distance movement station receive any GPS position information, then it it may be concluded that Region defined in the circle of the actual coverage area territory of this base station in fact no more than a diameter of t1.Thus, rear end Server can over time (such as, several weeks) error margin is reduced to t1.Through one extra time section, If back-end server does not obtains GPS position information from being positioned at the movement station in region defined in radius t2, Then error margin can be reduced to t2 by further.

As example, suppose that the site error surplus that local cache 260 is reported is less than in fig. 8 The positional accuracy that GPS system is reported, thus incorrectly indicate that from back-end server (or the pilot tone of base station Signal) positional information that obtains is more accurate than the positional information obtained from GPS system.As a result, by GPS Positional information is supplied to back-end server.But, if elapsed time passage, back-end server is from being positioned at Movement station between error margin and t1 receives any GPS position information, then error margin can finally be subtracted Little (by classification or the mode of step level) is to region defined in radius t1.Similarly, if when longer Between, back-end server does not receives any GPS position information from the movement station between t2 and t1, then miss Difference surplus can be reduced to t2.

In order to be reduced to reduce the message number that error margin needs to receive from movement station, in some implementations, If GPS position information appointment is positioned at the position within present threshold value (such as, t1 or t2), then move Stand and GPS position information is not reported to back-end server.In this way, back-end server will only receive and refer to Show positional information that is that present threshold value is probably mistake and that should be increased.

As used in this specification, term " assembly ", " module ", " system ", " device ", " interface " etc. is generally intended to represent the entity that computer is relevant, and it can be hardware, hardware and software Combination, software or operating software.Such as, assembly may be, but not limited to, and is, on a processor Process, processor, object, executable code, the thread of execution, program and/or the computer run.As Illustrate, run application on the controller and controller can be assembly.One or more assemblies can be stayed Stay process and/or perform in thread, and in assembly may be located at a computer and/or be distributed in two Or between more computer.

Additionally, theme required for protection can use to produce controls computer with the theme disclosed in realization Standard program and/or the engineering of software, firmware, hardware or its combination in any and be implemented as method, dress Put or goods." goods " can comprise and computer-readable can set from any as the term is used herein The computer program that standby, carrier or medium conduct interviews.Such as, computer-readable medium can include but not Be limited to magnetic storage apparatus (such as, hard disk, floppy disk, tape ...), CD (such as, compact-disc (CD), Digital versatile disc (DVD) ...), smart card, and flash memory device (such as, card, rod, key drive Device ...).Certainly, it will be appreciated by those skilled in the art that without departing substantially from theme required for protection This configuration can be carried out many amendments on the premise of scope or spirit.

Although the language special by architectural feature and/or method action describes this theme, it will be appreciated that Subject matter defined in the appended claims is not necessarily limited to above-mentioned specific features or action.More precisely, on State specific features and action is as realizing disclosed in the exemplary forms of claim.

Claims (7)

1. the method that movement station confirms its position, including:

The primary importance orientation of movement station (110) is obtained from the pilot signal received from base station (160)；

Described primary importance orientation is forwarded to the back-end server being associated with described base station；

Second position orientation is received from described back-end server；

By the described primary importance orientation obtained from described pilot signal and from described base station (160) The second position orientation that the back-end server (180) being associated obtains compares；And

If described second position orientation is mated in described primary importance orientation within error margin, then confirm Described primary importance, described error margin has and is defined by the maximal cover region of described base station (160) Maximum；

Wherein said error margin has the value derived from trusted position information source, and wherein said value is less than By maximum defined in the overlay area of described base station (160).

2. the method for claim 1, it is characterised in that if described primary importance orientation is verified, Also include the application that described primary importance orientation passes to ask the location fix of described movement station (110) Program (225), described application program (225) is associated with described movement station (110).

3. method as claimed in claim 2, it is characterised in that described application program (225) resides in On described movement station (110).

4. method as claimed in claim 2, it is characterised in that described application program (225) realizes base Service in position.

5. method as claimed in claim 4, it is characterised in that described trusted position information source is from detection Error margin is determined for described base station (160) in multiple movement stations of the signal of described base station (160) GPS system (255).

6. the method for claim 1, it is characterised in that obtain described primary importance orientation include from The local cache (260) of described movement station is retrieved described primary importance orientation, described primary importance Orientation previously stored explicitly with the base station identifier obtained from described pilot signal.

7. the method for claim 1, it is characterised in that be additionally included in the described primary importance side of checking Store it in after Wei in the local cache (260) of described movement station.