CN102186191A - Methods and devices for measuring OTDOA (observed time difference of arrival) and sending positioning assistance data and system - Google Patents

Methods and devices for measuring OTDOA (observed time difference of arrival) and sending positioning assistance data and system Download PDF

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CN102186191A
CN102186191A CN2011101157656A CN201110115765A CN102186191A CN 102186191 A CN102186191 A CN 102186191A CN 2011101157656 A CN2011101157656 A CN 2011101157656A CN 201110115765 A CN201110115765 A CN 201110115765A CN 102186191 A CN102186191 A CN 102186191A
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district
sub
otdoa
information
terminal
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全海洋
傅婧
贾贝贝
李国庆
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China Academy of Telecommunications Technology CATT
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China Academy of Telecommunications Technology CATT
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Abstract

The embodiment of the invention discloses methods and devices for measuring OTDOA (observed time difference of arrival) and sending positioning assistance data and a system, relating to the technical field of wireless communications. The methods, devices and system are used for solving the problem of failure of OTDOA positioning because UE can not carry out OTDOA measurement. The methods comprise the following steps that: the UE determines the cells which can detect the signals self and sends the information of the cells to a positioning server according to the determination result; the positioning server selects the OTDOA measurement cells for the UE according to the information of the cells and sends the OTDOA assistance data including the information of the OTDOA measurement cells to the UE; and the UE carries out OTDOA measurement according to the OTDOA assistance data. By adopting the methods, devices and system, the possibility of failure of OTDOA positioning can be reduced.

Description

OTDOA measures and positioning assistance data sending method, system and device
Technical field
The present invention relates to wireless communication field, relate in particular to a kind of OTDOA and measure and positioning assistance data sending method, system and device.
Background technology
In universal mobile telecommunications system (UMTS), observed time difference (OTDOA) method is mainly according to the measurement result of observed time difference type 2 between system-frame (SFN-SFN observed time difference type 2), and can estimate terminal (UE) position with reference to first path type (First Path Type) of each sub-district, the received signal intensity (RSS on DwPTS) of descending pilot frequency time slot and the measurement result of terminal relevant speed (UE Related Speed).These measurement results can be used for effectively estimating the UE position in conjunction with the result of the actual drive test and the network planning.The certainty of measurement of this method depends on number, measuring period, certainty of measurement and the location-estimation algorithm that can measure the sub-district.And can have the processing and the compensation method of the navigation system of non-direct reach path by some, the First Path Type according to measurement reports obtains better location estimation result.
Such as, in TD SDMA (TD-SCDMA) system, the OTDOA method is to determine the UE position by the time difference of detecting two base station signals arrival, and measuring amount is observed time difference between system-frame (SFN-SFN Observed Time Difference), and this measurement is carried out by UE.The OTDOA method is called hyperbola positioning method again, and it is on the hyperbola of focus that UE is positioned at two base stations.Need set up plural Hyperbolic Equation owing to determine the UE position, two two-dimensional position coordinates that hyp intersection point is UE, therefore, the OTDOA method requires to have simultaneously the measurement of the base station participation positional parameter more than three, as shown in Figure 1.
The rudimentary algorithm principle of OTDOA method is as follows:
Suppose the height of delocalization terminal, the coordinate of terminal be (x, y), 3 base station signals of then minimum needs are received, the position coordinates of i base station transmitter is (x i, y i), i=1,2,3.The time difference of terminal observation is respectively τ 1,2, τ 2,3, τ 1,3The group of then solving an equation
( x - x 2 ) 2 + ( y - y 2 ) 2 - ( x - x 1 ) 2 + ( y - y 1 ) 2 = τ 1,2 c ( x - x 3 ) 2 + ( y - y 3 ) 2 - ( x - x 1 ) 2 + ( y - y 1 ) 2 = τ 1,3 c ( x - x 3 ) 2 + ( y - y 3 ) 2 - ( x - x 2 ) 2 + ( y - y 2 ) 2 = τ 2,3 c
Can obtain terminal coordinate (x, y).If the measurement result of terminal is accurate, and the influence that does not have multipath to disturb, there is redundant one in so above 3 equations, just 3 equations are 2 uncorrelated equations.When equation had only one to separate, this was separated the coordinate that is UE and separates.When equation has 2 to separate, use with less that of this cell base station distance and separate, another is separated abandon as separating at last.When equation does not have when separating, this time location survey is invalid.The positioning accuracy of this method is probably at 10-200 rice.
In Long Term Evolution (LTE) system, the principle of OTDOA method is similarly, and just measuring amount is that the reference signal time difference, (Reference Signal Time Difference, RSTD), its implication was the time difference of the reference signal of two sub-districts receiving.With SFN-SFN observed time difference type 2 in the UMTS system be that similarly the using method in the location also is similar.
In the LTE system, the positioning flow of OTDOA is roughly as follows:
Location-server (E-SMLC) is by LTE location Additional Agreement (LTE Positioning Protocol Annex, LPPa) obtain the OTDOA auxiliary data of sub-district under this eNB from base station (eNB), position reference symbol (Positioning Reference Signalling, configuration information PRS) etc. comprising each sub-district.When terminal need be carried out the OTDOA location, E-SMLC provided the OTDOA auxiliary data to terminal, was about to OTDOA measurement cell set and disposed to terminal, and OTDOA measures and comprises the PRS relevant configuration information that each OTDOA measures the sub-district in the cell set.Terminal is measured the PRS that OTDOA measures the sub-district according to the OTDOA auxiliary data that E-SMLC provided, obtain the RSTD that OTDOA measures the sub-district, and measurement result is passed through LTE system location protocol, and (LTE Positioning Protocol LPP) reports E-SMLC.E-SMLC calculates the position of this terminal according to the measurement result of terminal.Specifically positioning flow is as shown in Figure 2:
Step 0:UE sets up Non-Access Stratum (NAS) with mobile management entity MME and is connected;
Step 1:UE sends Location Request to MME;
Step 2:MME sends to E-SMLC with Location Request;
Step 3:E-SMLC selects the OTDOA localization method;
Step 4:E-SMLC sends the LPP that carries the OTDOA auxiliary data to UE auxiliary data message is provided, and UE measures the PRS that OTDOA measures the sub-district according to the OTDOA auxiliary data;
Step 5:E-SMLC sends LPP request position information message to UE;
Step 6:UE sends the LPP that carries measurement result to E-SMLC location information message is provided;
Step 7:E-SMLC calculates the position coordinates of UE according to the measurement result of UE;
Step 8:E-SMLC is carried at positioning result and sends to MME in the location response;
Step 9:MME sends to UE with location response;
Step 10:UE returns Release complete to MME.
Wherein, above-mentioned steps 4, E-SMLC according to the residing sub-district of terminal with and the frequency range ability information supported, determine the required OTDOA auxiliary data of UE in the follow-up position fixing process, and provide auxiliary data message to send to UE by LPP.LPP provides in the auxiliary data message may comprise following information:
The information of OTDOA reference cell comprises the information such as Physical Cell Identifier (PCI), cellular global identity (CGI) and PRS configuration of OTDOA reference cell, and the reference cell of choosing is not limited to Serving cell;
The information list of the adjacent sub-district of OTDOA comprises the information such as PCI, CGI, frequency, PRS configuration of the adjacent sub-district of each OTDOA.Information of adjacent cells tabulation is to be beneficial to the adjacent sub-district of measurement according to some that in advance estimation of UE position is chosen.
The base station reports in the OTDOA auxiliary data that E-SMLC and E-SMLC offer UE by LPPa and comprises the PRS configuration information, and this PRS configuration information comprises the configuration index number of PRS, and concrete corresponding configuration is with reference to following table:
Figure BDA0000059360620000041
Terminal can also provide OTDOA auxiliary data by OTDOA request for assistance data message active request location-server in LPP.
In LPP E-SMLC send to the information of the reference cell of terminal and adjacent sub-district can be referring to agreement TS36.355.
E-SMLC offers in the OTDOA auxiliary data of UE, can also provide the sub-frame offset (prs-SubframeOffset) of PRS at each sub-district, the deviation of first PRS position of its expression reference cell and first PRS position of adjacent sub-district.
Following explanation about the OTDOA auxiliary data is arranged in LPP:
E-SMLC need provide at least one UE can obtain System Frame Number (SFN) in auxiliary data, promptly can search the sub-district of its signal, as Serving cell, this sub-district can be put in reference cell or the adjacent cell list.Otherwise, UE can't carry out OTDOA and measure, (The location server should include at least one cell for which the SFN can be obtained by the UE will fail in the location, e.g.the serving cell, in the assistance data, either as the assistance data reference cell or in the neighbor cell list. Otherwise the UE will be unable to perform the OTDOA measurement and the positioning operation will
In realizing process of the present invention, the inventor finds to exist in the prior art following technical problem:
In some cases, in fact location-server can't guarantee to carry the sub-district that at least one UE can obtain SFN in auxiliary data.Such as, when location-server is not known the information of the Serving cell at UE place, and owing to do not know the position of UE sub-district of living in, this UE of adjacent sub-district that is provided can't search, and makes UE can't carry out OTDOA and measures.Can recognize also that according to the description in the above-mentioned agreement this situation is contingent.In case the measurement that UE can't carry out OTDOA has taken place, just can't reach the purpose of location.Under urgent situation, can't satisfy location requirement is comparison danger, as urgent call, and urgent rescue etc.
Summary of the invention
The embodiment of the invention provides a kind of OTDOA to measure and positioning assistance data sending method, system and device, is used to solve because UE can't carry out the problem that the OTDOA measurement causes the failure of OTDOA location.
A kind of OTDOA method of measurement, this method comprises:
Terminal determines that self can detect the sub-district of signal, and according to definite result the information that self can detect the sub-district of signal is sent to location-server;
Terminal receives the OTDOA auxiliary data that OTDOA measures the information of sub-district that comprises of location-server transmission, carries out OTDOA according to this OTDOA auxiliary data and measures; It is the OTDOA measurement sub-district of location-server according to the Information Selection of described sub-district that described OTDOA measures the sub-district.
This terminal that the location-server receiving terminal sends can detect the information of the sub-district of signal;
Location-server is that described terminal selects observed time difference OTDOA to measure the sub-district according to the information of described sub-district;
The OTDOA auxiliary data that location-server will comprise the information of described OTDOA measurement sub-district sends to described terminal.
A kind of OTDOA measurement mechanism, this device comprises:
The cell information transmitting element is used for determining self can detect the sub-district of signal, and according to definite result the information that self can detect the sub-district of signal is sent to location-server;
The OTDOA measuring unit is used to receive the OTDOA auxiliary data that OTDOA measures the information of sub-district that comprises that location-server sends, and carries out OTDOA according to this OTDOA auxiliary data and measures; It is the OTDOA measurement sub-district of location-server according to the Information Selection of described sub-district that described OTDOA measures the sub-district.
A kind of positioning assistance data dispensing device, this device comprises:
The cell information receiving element, this terminal that is used for the receiving terminal transmission can detect the information of the sub-district of signal;
OTDOA cell selecting unit, the information that is used for according to described sub-district is that described terminal selects observed time difference OTDOA to measure the sub-district;
The auxiliary data transmitting element, the OTDOA auxiliary data that is used for comprising the information of described OTDOA measurement sub-district sends to described terminal.
A kind of wireless communication system, this system comprises:
Terminal is used for determining self can detect the sub-district of signal, and according to definite result the information that self can detect the sub-district of signal is sent to location-server; Receive the OTDOA auxiliary data that observed time difference OTDOA measures the information of sub-district that comprises of location-server transmission, carry out OTDOA according to this OTDOA auxiliary data and measure.
Location-server is used for the information that this terminal that receiving terminal sends can detect the sub-district of signal, is that described terminal selects OTDOA to measure the sub-district according to the information of described sub-district; The OTDOA auxiliary data that will comprise the information of described OTDOA measurement sub-district sends to described terminal.
Among the present invention, terminal determines that self can detect the sub-district of signal, and the information that self can detect the sub-district of signal is sent to location-server according to definite result, location-server is that described terminal selects OTDOA to measure the sub-district according to the information of described sub-district, and will comprise the OTDOA auxiliary data that described OTDOA measures the information of sub-district and send to terminal, terminal is carried out OTDOA according to this OTDOA auxiliary data and is measured.As seen, in this programme, terminal sends to location-server with the information that self can detect the sub-district of signal, making location-server can detect the sub-district of signal from terminal is that terminal selects OTDOA to measure the sub-district, when follow-up terminal is carried out the OTDOA measurement to this OTDOA measurement sub-district, because it is can detect the sub-district of selecting the sub-district of signal from terminal that this OTDOA measures the sub-district, therefore terminal can not occur owing to detect less than OTDOA measures the signal of sub-district and can't carry out the problem that OTDOA measures, and then avoid owing to can't carry out the problem of failing in OTDOA location that OTDOA measurements cause.
Description of drawings
Fig. 1 is an OTDOA positioning principle schematic diagram in the prior art;
Fig. 2 is the positioning flow schematic diagram that UE triggers in the prior art;
The method flow schematic diagram that Fig. 3 provides for the embodiment of the invention;
The other method schematic flow sheet that Fig. 4 provides for the embodiment of the invention;
Fig. 5 is the positioning flow schematic diagram of the embodiment of the invention;
The system configuration schematic diagram that Fig. 6 provides for the embodiment of the invention;
The apparatus structure schematic diagram that Fig. 7 provides for the embodiment of the invention;
Another apparatus structure schematic diagram that Fig. 8 provides for the embodiment of the invention.
Embodiment
Can't carry out the problem that the OTDOA measurement causes the failure of OTDOA location for fear of UE, the embodiment of the invention provides a kind of OTDOA to measure and the positioning assistance data sending method, in this method, terminal sends to location-server with the information that self can detect the sub-district of signal, and location-server is that terminal selects OTDOA to measure the sub-district according to the information of described sub-district.
Referring to Fig. 3, the OTDOA method of measurement that the embodiment of the invention provides may further comprise the steps:
Step 30: terminal determines that self can detect the sub-district of signal, and according to definite result the information that self can detect the sub-district of signal is sent to location-server;
Step 31: terminal receives the OTDOA auxiliary data that OTDOA measures the information of sub-district that comprises of location-server transmission, carries out OTDOA according to this OTDOA auxiliary data and measures; It is the OTDOA measurement sub-district of location-server according to the Information Selection of described sub-district that described OTDOA measures the sub-district.Here, carry out OTDOA according to this OTDOA auxiliary data and measure, be meant, measure the PRS that OTDOA measures the sub-district, thereby obtain RSTD according to prior art.
In the step 30, as a kind of execution mode, terminal can be when OTDOA measures failure, the information that self can be detected the sub-district of signal sends to location-server, concrete, before terminal determined that self can detect the sub-district of signal, terminal received the OTDOA auxiliary data that location-server sends; Terminal is behind the signal that detects all or part of OTDOA measurement sub-district indicated less than described OTDOA auxiliary data, determine that self can detect the sub-district of signal, then according to determining that the result sends to location-server with the information that self can detect the sub-district of signal.Here, the quantity of part of O TDOA measurement sub-district can preestablish.Concrete, terminal can by wrong Indication message or aborted message or request for assistance data message or positional information gives information or the message of other redeterminations etc., and the information that self can be detected the sub-district of signal sends to location-server.
As another kind of execution mode, terminal can be determined certainly when needs obtain the OTDOA auxiliary data
Body can detect the sub-district of signal, then according to determining that the result sends to location-server with the information that self can detect the sub-district of signal.Concrete, terminal can be passed through the message of request for assistance data message or other redeterminations etc., and the information that self can be detected the sub-district of signal sends to location-server.
In the step 30, when terminal sends to location-server with the information that self can detect the sub-district of signal, sort according to the cell signal quality in the sub-district that can at first self can be detected signal, and the information of the sub-district after will sorting is carried in the corresponding message and sends to location-server.For example, self can be able to be detected the sub-district of signal according to cell signal quality rank order from high to low.
In this method, the information of the sub-district that can detect signal that terminal sends comprises: the information that the physical label of this sub-district and frequency etc. can this sub-districts of unique identification.
Referring to Fig. 4, the positioning assistance data sending method that the embodiment of the invention provides may further comprise the steps:
Step 40: this terminal that the location-server receiving terminal sends can detect the information of the sub-district of signal;
Step 41: location-server is that described terminal selects OTDOA to measure the sub-district according to the information of described sub-district, and promptly location-server selects OTDOA to measure the sub-district from described sub-district;
Step 42: the OTDOA auxiliary data that location-server will comprise the information of described OTDOA measurement sub-district sends to described terminal.
In the step 40, location-server can be after terminal sends the OTDOA auxiliary data, this terminal that receiving terminal sends can detect the information of the sub-district of signal, concrete, can detect in this terminal that the location-server receiving terminal sends before the information of sub-district of signal, location-server receives the Location Request that terminal sends, the OTDOA auxiliary data that the OTDOA that will comprise generation measures the information of sub-district sends to terminal, it is that the OTDOA that location-server is determined according to prior art measures the sub-district that the OTDOA of this generation measures the sub-district, promptly according to the residing sub-district of terminal with and the OTDOA that determines of the frequency range ability information supported measure the sub-district.
In the step 41, location-server is that described terminal selects OTDOA to measure the sub-district according to the information of described sub-district, and its specific implementation can be as follows:
Location-server selects to set the best sub-district of a number signal quality according to the information of described sub-district from described sub-district, the sub-district is measured as OTDOA in the sub-district of selecting.
Certainly, location-server can also be chosen according to additive method, for example system of selection at random, method of selecting according to the signal quality thresholding that is provided with or the like, write down the positional information that selectable OTDOA measures the sub-district as long as guarantee location-server, so that the follow-up positional information that can calculate UE.
In the step 40, location-server can by wrong Indication message or aborted message or request for assistance data message or positional information gives information or the message of other redeterminations, and this terminal that receiving terminal sends can detect the information of the sub-district of signal.
Step 41, described OTDOA measures the sub-district and comprises: the adjacent sub-district of OTDOA reference cell and/or OTDOA.For example, the OTDOA that signal quality is best measures the sub-district as the OTDOA reference cell, and other OTDOA measures the sub-district as the adjacent sub-district of OTDOA.The information of OTDOA reference cell comprises the information such as Physical Cell Identifier (PCI), cellular global identity (CGI) and PRS configuration of OTDOA reference cell; The information of the adjacent sub-district of OTDOA comprises information such as PCI, CGI, frequency, the PRS configuration of the adjacent sub-district of each OTDOA.
Below the present invention is specifically described:
Provide a kind of improved OTDOA localization method among the present invention.Main thought is when terminal finds to use the auxiliary data that location-server gives, the notice location-server, and the information that oneself can detect the sub-district of signal is provided, for referencial use for this terminal selection suitable OTDOA reference cell and the adjacent sub-district of OTDOA again for location-server.Terminal also can initiatively provide oneself can detect the information of the sub-district of signal.
The main behavior of end side is as follows:
Terminal is received the OTDOA auxiliary data that location-server is sent, the information that has wherein comprised OTDOA measurement sub-district, if terminal is found to detect the signal that these OTDOA measure the sub-district, thereby when can't obtain the SFN of OTDOA measurement sub-district, then send message informing, and provide the cell list that oneself can detect signal for the location-server reference to location-server.
Terminal can be by request auxiliary data message, perhaps wrong Indication message, and perhaps aborted message is perhaps introduced new information, and location information message perhaps is provided, and carries the information that oneself can detect the sub-district of signal.
Terminal can be with each sub-district according to signal quality rank order from high to low, so that E-SMLC carries out the selection that OTDOA measures the sub-district before location-server provides the cell list that oneself can detect signal.
The main behavior of location-server (E-SMLC) side is as follows:
Location-server is received when UE that terminal is sent can detect the cell list of signal, again be that terminal selects OTDOA to measure the sub-district according to this cell list, comprise and select OTDOA reference cell and/or the adjacent sub-district of OTDOA, and the information that the OTDOA that selects measures the sub-district is sent to terminal by LPP message.
E-SMLC is when selecting OTDOA to measure the sub-district for terminal, and the sub-district of as far as possible paying the utmost attention to forward position in the cell list is as OTDOA reference cell and/or the adjacent sub-district of OTDOA.
Embodiment one:
As shown in Figure 5, idiographic flow is as follows:
Step 1:UE obtains the OTDOA auxiliary data from E-SMLC, concrete, UE sends Location Request to MME, and MME sends to E-SMLC with Location Request, E-SMLC selects the OTDOA localization method, and sends the LPP that carries the OTDOA auxiliary data to UE auxiliary data message is provided;
Step 2: terminal is determined to detect the signal that the indicated OTDOA of OTDOA auxiliary data measures the sub-district;
Step 3: terminal sends wrong Indication message by LPP to E-SMLC, wherein carries information that can't detect OTDOA measurement sub-district and the tabulation that terminal can detect the sub-district of signal.
Particularly, the ASN.1 formal definition of mistake Indication message is as follows:
Figure BDA0000059360620000101
Figure BDA0000059360620000111
Comprising public error message (commonIEsError), external protocol data unit sequence number (EPDU-Sequence) etc., newly-increased detected cells tabulation (DetectCellList, be the tabulation that terminal can detect the sub-district of signal) in the sub-district number can be decided to be other numerical value, not necessarily 24.The information of this sub-district can comprise sub-district physical label (physCellId), and frequency (earfcn) information also can provide other information relevant with this sub-district.Sub-district in the cell list can be according to cell signal quality rank order from high to low, so that E-SMLC carries out the selection of reference cell.
Step 4:E-SMLC receives the wrong Indication message that terminal sends, again is that according to the cell information that carries in the wrong Indication message this terminal selects OTDOA to measure the sub-district, and sends to terminal by the OTDOA auxiliary data that LPP message (OTDOA-ProvideAssistanceData) will comprise the information of OTDOA measurement sub-district;
Step 5: after terminal is received the OTDOA auxiliary data, proceed the OTDOA surveying work according to the OTDOA auxiliary data;
Step 6: finish follow-up relevant positioning function.
Embodiment two:
As shown in Figure 5, idiographic flow is as follows:
Step 1:UE obtains the OTDOA auxiliary data from E-SMLC, concrete, UE sends Location Request to MME, and MME sends to E-SMLC with Location Request, E-SMLC selects the OTDOA localization method, and sends the LPP that carries the OTDOA auxiliary data to UE auxiliary data message is provided;
Step 2: terminal is determined to detect the signal that the indicated OTDOA of OTDOA auxiliary data measures the sub-district;
Step 3: terminal sends aborted message by LPP to E-SMLC, wherein carries information that can't detect OTDOA measurement sub-district and the tabulation that terminal can detect the sub-district of signal.
Particularly, the ASN.1 of aborted message is defined as follows:
Figure BDA0000059360620000121
Comprising common interrupt information (commonIEsAbort), external protocol data unit sequence number (EPDU-Sequence) etc., newly-increased detected cells tabulation (DetectCellList, be the tabulation that terminal can detect the sub-district of signal) in the sub-district number can be decided to be other numerical value, not necessarily 24.The information of this sub-district can comprise sub-district physical label (physCellId), and frequency (earfcn) information also can provide other information relevant with this sub-district.Sub-district in the cell list can be according to cell signal quality rank order from high to low, so that E-SMLC carries out the selection of reference cell.
Step 4:E-SMLC receives the aborted message that terminal sends, the cell information that heavily carries according to aborted message is that this terminal selects OTDOA to measure the sub-district again, and sends to terminal by the OTDOA auxiliary data that LPP message (OTDOA-ProvideAssistanceData) will comprise the information of OTDOA measurement sub-district;
Step 5: after terminal is received the OTDOA auxiliary data, proceed the OTDOA surveying work according to the OTDOA auxiliary data;
Step 6: finish follow-up relevant positioning function.
Embodiment three:
Step 1:UE obtains the OTDOA auxiliary data from E-SMLC, concrete, UE sends Location Request to MME, and MME sends to E-SMLC with Location Request, E-SMLC selects the OTDOA localization method, and sends the LPP that carries the OTDOA auxiliary data to UE auxiliary data message is provided;
Step 2: terminal is determined to detect the signal that the indicated OTDOA of OTDOA auxiliary data measures the sub-district;
Step 3: terminal sends request for assistance data message to E-SMLC again by LPP, wherein carries information that can't detect OTDOA measurement sub-district and the tabulation that terminal can detect the sub-district of signal.
Particularly, the ASN.1 of request for assistance data message is defined as follows:
Figure BDA0000059360620000141
Figure BDA0000059360620000151
Comprising public request auxiliary data information (commonIEsRequestAssistanceData), wherein can select is the request of data of which method, as OTDOA etc., in the auxiliary data of OTDOA request, comprised Physical Cell Identifier (physCellId); Sub-district number in the newly-increased detected cells tabulation (DetectCellList, promptly terminal can detect the tabulation of the sub-district of signal) can be decided to be other numerical value, and not necessarily 24.The information of this sub-district can comprise sub-district physical label (physCellId), and frequency (earfcn) information also can provide other information relevant with this sub-district.Sub-district in the cell list can be according to cell signal quality rank order from high to low, so that E-SMLC carries out the selection of reference cell.
Step 4:E-SMLC receives the request for assistance data message that terminal sends, again is that according to the cell information that carries in the request for assistance data message this terminal selects OTDOA to measure the sub-district, and sends to terminal by the OTDOA auxiliary data that LPP message (OTDOA-ProvideAssistanceData) will comprise the information of OTDOA measurement sub-district;
Step 5: after terminal is received the OTDOA auxiliary data, proceed the OTDOA surveying work according to the OTDOA auxiliary data;
Step 6: finish follow-up relevant positioning function.
Embodiment four:
Step 1: terminal sends request for assistance data message to E-SMLC, and wherein carried terminal can detect the tabulation of the sub-district of signal;
Step 2:E-SMLC receives the request for assistance data message that terminal sends, is that according to the cell information that carries in the request for assistance data message this terminal selects OTDOA to measure the sub-district, and sends to terminal by the OTDOA auxiliary data that LPP message (OTDOA-ProvideAssistanceData) will comprise the information of OTDOA measurement sub-district;
Step 3: after terminal is received the OTDOA auxiliary data, carry out the OTDOA surveying work according to the OTDOA auxiliary data;
Step 4: finish follow-up relevant positioning function.
Embodiment five:
Step 1: terminal is to the message of E-SMLC transmission redetermination, and wherein carried terminal can detect the tabulation of the sub-district of signal; Need to carry following information in the new information:
Figure BDA0000059360620000161
Wherein the sub-district number in the detected cells tabulation (DetectCellList, promptly terminal can detect the tabulation of the sub-district of signal) can be decided to be other numerical value, and not necessarily 24.The information of this sub-district can comprise sub-district physical label (physCellId), and frequency (earfcn) information also can provide other information relevant with this sub-district.
Step 2:E-SMLC receives the new information that terminal sends, is that according to the cell information that carries in the new information this terminal selects OTDOA to measure the sub-district, and sends to terminal by the OTDOA auxiliary data that LPP message (OTDOA-ProvideAssistanceData) will comprise the information of OTDOA measurement sub-district;
Step 3: after terminal is received the OTDOA auxiliary data, carry out the OTDOA surveying work according to the OTDOA auxiliary data;
Step 4: finish follow-up relevant positioning function.
Embodiment six:
As shown in Figure 5, idiographic flow is as follows:
Step 1:UE obtains the OTDOA auxiliary data from E-SMLC, concrete, UE sends Location Request to MME, and MME sends to E-SMLC with Location Request, E-SMLC selects the OTDOA localization method, and sends the LPP that carries the OTDOA auxiliary data to UE auxiliary data message is provided;
Step 2: terminal is determined to detect the signal that the indicated OTDOA of OTDOA auxiliary data measures the sub-district;
Step 3: terminal sends positional information by LPP to E-SMLC and gives information, and wherein carries information that can't detect OTDOA measurement sub-district and the tabulation that terminal can detect the sub-district of signal.
Particularly, the ASN.1 that gives information of positional information is defined as follows:
Figure BDA0000059360620000171
Object information (OTDOA-SignalMeasurementInformation) and OTDOA error message (OTDOA-Error) comprising existing OTDOA measures have provided error reason in the OTDOA error message; Sub-district number in the newly-increased detected cells tabulation (DetectCellList, promptly terminal can detect the tabulation of the sub-district of signal) can be decided to be other numerical value, and not necessarily 24.The information of this sub-district can comprise sub-district physical label (physCellId), and frequency (earfcn) information also can provide other information relevant with this sub-district.Sub-district in the cell list can be according to cell signal quality rank order from high to low, so that E-SMLC carries out the selection of reference cell.
Step 4:E-SMLC receives that the positional information that terminal sends gives information, the cell information that carries in giving information according to positional information is that this terminal selects OTDOA to measure the sub-district again, and sends to terminal by the OTDOA auxiliary data that LPP message (OTDOA-ProvideAssistanceData) will comprise the information of OTDOA measurement sub-district;
Step 5: after terminal is received the OTDOA auxiliary data, proceed the OTDOA surveying work according to the OTDOA auxiliary data;
Step 6: finish follow-up relevant positioning function.
Referring to Fig. 6, the embodiment of the invention also provides a kind of wireless communication system, and this system comprises:
Terminal 60 is used for determining self can detect the sub-district of signal, and according to definite result the information that self can detect the sub-district of signal is sent to location-server; Receive the OTDOA auxiliary data that observed time difference OTDOA measures the information of sub-district that comprises of location-server transmission, carry out OTDOA according to this OTDOA auxiliary data and measure.
Location-server 61 is used for the information that this terminal that receiving terminal sends can detect the sub-district of signal, is that described terminal selects OTDOA to measure the sub-district according to the information of described sub-district; The OTDOA auxiliary data that will comprise the information of described OTDOA measurement sub-district sends to described terminal.
Referring to Fig. 7, the embodiment of the invention provides a kind of OTDOA measurement mechanism, and this device comprises:
Cell information transmitting element 70 is used for determining self can detect the sub-district of signal, and according to definite result the information that self can detect the sub-district of signal is sent to location-server;
OTDOA measuring unit 71 is used to receive the OTDOA auxiliary data that OTDOA measures the information of sub-district that comprises that location-server sends, and carries out OTDOA according to this OTDOA auxiliary data and measures; It is the OTDOA measurement sub-district of location-server according to the Information Selection of described sub-district that described OTDOA measures the sub-district.
This device also comprises:
Data Receiving unit 72 is used for receiving the OTDOA auxiliary data that location-server sends before determining self can to detect the sub-district of signal;
Described cell information transmitting element 70 is used for:
Behind the signal that detects all or part of OTDOA measurement sub-district indicated, determine that self can detect the sub-district of signal less than described OTDOA auxiliary data.
Described cell information transmitting element 70 is used for:
When needs obtain the OTDOA auxiliary data, determine that self can detect the sub-district of signal.
Described cell information transmitting element 70 is used for:
By wrong Indication message or aborted message or request for assistance data message or positional information gives information or the message of other redeterminations, the information that self can be detected the sub-district of signal sends to location-server.
The information that can detect the sub-district of signal comprises: the physical label of this sub-district and frequency.
Described cell information transmitting element 70 is used for:
Sorted according to the cell signal quality in the sub-district that self can detect signal, and the information of the sub-district after will sorting sends to location-server.
Referring to Fig. 8, the embodiment of the invention provides a kind of positioning assistance data dispensing device, and this device comprises:
Cell information receiving element 80, this terminal that is used for the receiving terminal transmission can detect the information of the sub-district of signal;
OTDOA cell selecting unit 81, the information that is used for according to described sub-district is that described terminal selects observed time difference OTDOA to measure the sub-district;
Auxiliary data transmitting element 82, the OTDOA auxiliary data that is used for comprising the information of described OTDOA measurement sub-district sends to described terminal.
Described auxiliary data transmitting element 82 also is used for:
Can detect in this terminal that receiving terminal sends before the information of sub-district of signal, receive the Location Request that terminal sends, the OTDOA auxiliary data that the OTDOA that will comprise generation measures the information of sub-district sends to terminal.
Described OTDOA cell selecting unit 81 is used for:
From described sub-district, select to set the best sub-district of a number signal quality according to the information of described sub-district, the sub-district is measured as OTDOA in the sub-district of selecting.
Described cell information receiving element 80 is used for:
By wrong Indication message or aborted message or request for assistance data message or positional information gives information or the message of other redeterminations, this terminal that receiving terminal sends can detect the information of the sub-district of signal.
Described OTDOA measures the sub-district and comprises: the adjacent sub-district of OTDOA reference cell and/or OTDOA.
To sum up, beneficial effect of the present invention comprises:
In the scheme that the embodiment of the invention provides, terminal determines that self can detect the sub-district of signal, and the information that self can detect the sub-district of signal is sent to location-server according to definite result, location-server is that described terminal selects OTDOA to measure the sub-district according to the information of described sub-district, and will comprise the OTDOA auxiliary data that described OTDOA measures the information of sub-district and send to terminal, terminal is carried out OTDOA according to this OTDOA auxiliary data and is measured.As seen, in this programme, terminal sends to location-server with the information that self can detect the sub-district of signal, making location-server can detect the sub-district of signal from terminal is that terminal selects OTDOA to measure the sub-district, when follow-up terminal is carried out the OTDOA measurement to this OTDOA measurement sub-district, because it is can detect the sub-district of selecting the sub-district of signal from terminal that this OTDOA measures the sub-district, therefore terminal can not occur owing to detect less than OTDOA measures the signal of sub-district and can't carry out the problem that OTDOA measures, and then avoid owing to can't carry out the problem of failing in OTDOA location that OTDOA measurements cause.
The present invention is that reference is described according to the flow chart and/or the block diagram of method, equipment (system) and the computer program of the embodiment of the invention.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or the block diagram and/or square frame and flow chart and/or the block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, make the instruction of carrying out by the processor of computer or other programmable data processing device produce to be used for the device of the function that is implemented in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, make the instruction that is stored in this computer-readable memory produce the manufacture that comprises command device, this command device is implemented in the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be loaded on computer or other programmable data processing device, make on computer or other programmable devices and to carry out the sequence of operations step producing computer implemented processing, thereby the instruction of carrying out on computer or other programmable devices is provided for being implemented in the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
Although described the preferred embodiments of the present invention, in a single day those skilled in the art get the basic creative notion of cicada, then can make other change and modification to these embodiment.So claims are intended to all changes and the modification that are interpreted as comprising preferred embodiment and fall into the scope of the invention.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.

Claims (23)

1. observed time difference OTDOA method of measurement is characterized in that this method comprises:
Terminal determines that self can detect the sub-district of signal, and according to definite result the information that self can detect the sub-district of signal is sent to location-server;
Terminal receives the OTDOA auxiliary data that OTDOA measures the information of sub-district that comprises of location-server transmission, carries out OTDOA according to this OTDOA auxiliary data and measures; It is the OTDOA measurement sub-district of location-server according to the Information Selection of described sub-district that described OTDOA measures the sub-district.
2. the method for claim 1 is characterized in that, before terminal determined that self can detect the sub-district of signal, this method further comprised:
Terminal receives the OTDOA auxiliary data that location-server sends;
Described terminal determines that the sub-district that self can detect signal comprises:
Terminal determines that self can detect the sub-district of signal behind the signal that detects all or part of OTDOA measurement sub-district indicated less than described OTDOA auxiliary data.
3. the method for claim 1 is characterized in that, described terminal determines that the sub-district that self can detect signal comprises:
When terminal is obtained the OTDOA auxiliary data at needs, determine that self can detect the sub-district of signal.
4. the method for claim 1 is characterized in that, terminal sends to location-server with the information that self can detect the sub-district of signal and comprises:
Terminal sorts the sub-district that self can detect signal according to the cell signal quality, and the information of the sub-district after will sorting sends to location-server.
5. as arbitrary described method among the claim 1-4, it is characterized in that, terminal is by wrong Indication message or aborted message or request for assistance data message or positional information gives information or the message of other redeterminations, and the information that self can be detected the sub-district of signal sends to location-server.
6. as arbitrary described method among the claim 1-4, it is characterized in that the information that terminal can detect the sub-district of signal comprises: the physical label of this sub-district and frequency.
7. a positioning assistance data sending method is characterized in that, this method comprises:
This terminal that the location-server receiving terminal sends can detect the information of the sub-district of signal;
Location-server is that described terminal selects observed time difference OTDOA to measure the sub-district according to the information of described sub-district;
The OTDOA auxiliary data that location-server will comprise the information of described OTDOA measurement sub-district sends to described terminal.
8. method as claimed in claim 7 is characterized in that, can detect in this terminal that the location-server receiving terminal sends before the information of sub-district of signal, and this method further comprises:
Location-server receives the Location Request that terminal sends, and the OTDOA auxiliary data that the OTDOA that will comprise generation measures the information of sub-district sends to terminal.
9. method as claimed in claim 7 is characterized in that, described location-server is that described terminal selects OTDOA measurement sub-district to comprise according to the information of described sub-district:
Location-server selects to set the best sub-district of a number signal quality according to the information of described sub-district from described sub-district, the sub-district is measured as OTDOA in the sub-district of selecting.
10. as arbitrary described method among the claim 7-9, it is characterized in that, location-server is by wrong Indication message or aborted message or request for assistance data message or positional information gives information or the message of other redeterminations, and this terminal that receiving terminal sends can detect the information of the sub-district of signal.
11., it is characterized in that described OTDOA measures the sub-district and comprises as arbitrary described method among the claim 7-9: the adjacent sub-district of OTDOA reference cell and/or OTDOA.
12. an observed time difference OTDOA measurement mechanism is characterized in that this device comprises:
The cell information transmitting element is used for determining self can detect the sub-district of signal, and according to definite result the information that self can detect the sub-district of signal is sent to location-server;
The OTDOA measuring unit is used to receive the OTDOA auxiliary data that OTDOA measures the information of sub-district that comprises that location-server sends, and carries out OTDOA according to this OTDOA auxiliary data and measures; It is the OTDOA measurement sub-district of location-server according to the Information Selection of described sub-district that described OTDOA measures the sub-district.
13. device as claimed in claim 12 is characterized in that, this device also comprises:
The Data Receiving unit is used for receiving the OTDOA auxiliary data that location-server sends before determining self can to detect the sub-district of signal;
Described cell information transmitting element is used for:
Behind the signal that detects all or part of OTDOA measurement sub-district indicated, determine that self can detect the sub-district of signal less than described OTDOA auxiliary data.
14. device as claimed in claim 12 is characterized in that, described cell information transmitting element is used for:
When needs obtain the OTDOA auxiliary data, determine that self can detect the sub-district of signal.
15., it is characterized in that described cell information transmitting element is used for as arbitrary described device among the claim 12-14:
By wrong Indication message or aborted message or request for assistance data message or positional information gives information or the message of other redeterminations, the information that self can be detected the sub-district of signal sends to location-server.
16., it is characterized in that the information that can detect the sub-district of signal comprises: the physical label of this sub-district and frequency as arbitrary described device among the claim 12-14.
17., it is characterized in that described cell information transmitting element is used for as arbitrary described device among the claim 12-14:
Sorted according to the cell signal quality in the sub-district that self can detect signal, and the information of the sub-district after will sorting sends to location-server.
18. a positioning assistance data dispensing device is characterized in that, this device comprises:
The cell information receiving element, this terminal that is used for the receiving terminal transmission can detect the information of the sub-district of signal;
OTDOA cell selecting unit, the information that is used for according to described sub-district is that described terminal selects observed time difference OTDOA to measure the sub-district;
The auxiliary data transmitting element, the OTDOA auxiliary data that is used for comprising the information of described OTDOA measurement sub-district sends to described terminal.
19. device as claimed in claim 18 is characterized in that, described auxiliary data transmitting element also is used for:
Can detect in this terminal that receiving terminal sends before the information of sub-district of signal, receive the Location Request that terminal sends, the OTDOA auxiliary data that the OTDOA that will comprise generation measures the information of sub-district sends to terminal.
20. device as claimed in claim 18 is characterized in that, described OTDOA cell selecting unit is used for:
From described sub-district, select to set the best sub-district of a number signal quality according to the information of described sub-district, the sub-district is measured as OTDOA in the sub-district of selecting.
21., it is characterized in that described cell information receiving element is used for as arbitrary described device among the claim 18-20:
By wrong Indication message or aborted message or request for assistance data message or positional information gives information or the message of other redeterminations, this terminal that receiving terminal sends can detect the information of the sub-district of signal.
22., it is characterized in that described OTDOA measures the sub-district and comprises as arbitrary described device among the claim 18-20: the adjacent sub-district of OTDOA reference cell and/or OTDOA.
23. a wireless communication system is characterized in that, this system comprises:
Terminal is used for determining self can detect the sub-district of signal, and according to definite result the information that self can detect the sub-district of signal is sent to location-server; Receive the OTDOA auxiliary data that observed time difference OTDOA measures the information of sub-district that comprises of location-server transmission, carry out OTDOA according to this OTDOA auxiliary data and measure;
Location-server is used for the information that this terminal that receiving terminal sends can detect the sub-district of signal, is that described terminal selects OTDOA to measure the sub-district according to the information of described sub-district; The OTDOA auxiliary data that will comprise the information of described OTDOA measurement sub-district sends to described terminal.
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US11751084B2 (en) 2018-09-05 2023-09-05 Datang Mobile Communications Equipment Co., Ltd. Network node, user equipment and base station used in a communication system and method for location resource coordination
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