CN102724699A - OTDOA measurement, and positioning assist data transmission method, system and apparatus - Google Patents
OTDOA measurement, and positioning assist data transmission method, system and apparatus Download PDFInfo
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Abstract
The embodiment of the invention discloses OTDOA (Observed Time Difference of Arrival) measurement, and a positioning assist data transmission method, a positioning assist data transmission system and a positioning assist data transmission apparatus, pertaining to the technical field of wireless communication, so as to solve the problem of OTDOA positioning failure caused by UE inability to perform the OTDOA measurement. According to the invention, a terminal determines residence communities which can detect signals by themselves, and on the basis of the determination result, information of the residence communities which can detect the signal by themselves is transmitted to a positioning server. The positioning server, on the basis of the residence community information, selects an OTDOA measurement residence community for the terminal, and transmits the OTDOA assist data which comprises the OTDOA measurement residence community information to the terminal. The terminal carries out the OTDOA measurement on the basis of the OTDOA assist data. According to the invention, the possibility of the OTDOA positioning failure can be reduced.
Description
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 UMTS (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 position, terminal (UE) with reference to first path type (First Path Type) of each sub-district, the reception signal strength 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 combine the result of the actual drive test and the network planning, can be used for effectively estimating the UE position.But the certainty of measurement of this method depends on number, measuring period, certainty of measurement and the location-estimation algorithm of measurement cell.And can have the processing and the compensation method of the navigation system of non-direct reach path through some, the First Path Type according to measurement and report obtains better location estimation result.
Such as; In TD SDMA (TD-SCDMA) system; The OTDOA method is to confirm the UE position through 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 confirm the UE position, two two-dimensional position coordinates that hyp intersection point is UE, therefore, the OTDOA method requires to have simultaneously the base station more than three to participate in the measurement of positional parameter, and is as shown in Figure 1.
The rudimentary algorithm principle of OTDOA method is following:
Suppose the height at delocalization terminal, the coordinate at 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
Can obtain the terminal coordinate (x, y).If the measurement result at 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 similar; 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 method for using in the location also is similar.
In the LTE system, the positioning flow of OTDOA is roughly following:
Location-server (E-SMLC) is through LTE location Additional Agreement (LTE Positioning Protocol Annex; LPPa) (eNB) obtains the OTDOA auxiliary data of sub-district under this eNB from the base station; Position reference symbol (Positioning Reference Signalling, configuration information PRS) etc. comprising each sub-district.When the OTDOA location need be carried out in the terminal, E-SMLC provided the OTDOA auxiliary data to the terminal, was about to OTDOA measurement cell collection and disposed to the terminal, and the OTDOA measurement cell is concentrated the PRS relevant configuration information that comprises each OTDOA measurement cell.The terminal is measured according to OTDOA auxiliary data that E-SMLC the provided PRS to the OTDOA measurement cell; Obtain the RSTD of OTDOA measurement cell; And measurement result is passed through LTE system location protocol, and (LTE Positioning Protocol LPP) reports E-SMLC.E-SMLC calculates the position at this terminal according to the measurement result at terminal.Concrete 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 according to the PRS of OTDOA auxiliary data to the OTDOA measurement cell;
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 residing sub-district, 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 through LPP.LPP provides in the auxiliary data message possibly 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 through 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:
The terminal can also provide OTDOA auxiliary data through OTDOA request for assistance data message active request location-server in LPP.
In LPP E-SMLC send to the information of reference cell and the adjacent sub-district at terminal 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 to 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, like Serving cell, can this sub-district 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 fail).
In long-term evolution upgrading (LTE-A) system, the peak rate of system has huge raising than LTE system, requires to reach descending 1Gbps, up 500Mbps.Therefore; The LTE-A system needs the terminal extension available bandwidth, has introduced carrier aggregation (CA) technology, be about under the same base station a plurality of continuous or discrete carrier aggregation together; Be terminal service simultaneously; So that required speed to be provided, these carrier waves that condense together be called again member carrier (Component Carrier, CC).Each sub-district can be a member carrier.In order to guarantee backwards compatibility, each carrier wave maximum is no more than 20MHz.
In the LTE-A system; In the sub-district of terminal on measuring a plurality of frequencies, need to give the base station through Radio Resource control (RRC) signaling transmission OTDOA cell information or frequency information, (GAP) at interval measured for this terminal configuration in the base station; Network dispatch terminal not during measuring GAP; Let the terminal carry out different-frequency measure, the terminal is carried out relevant OTDOA and is measured during measuring GAP.
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 in auxiliary data, to carry the sub-district that at least one UE can obtain SFN.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 hazardous, like 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:
The terminal confirms 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;
The terminal receives the OTDOA auxiliary data of the information that comprises the OTDOA measurement cell of location-server transmission, carries out OTDOA according to this OTDOA auxiliary data and measures; Said OTDOA measurement cell is the OTDOA measurement cell of location-server according to the Information Selection of said 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 observed time difference OTDOA measurement cell is selected at said terminal according to the information of said sub-district;
The OTDOA auxiliary data that location-server will comprise the information of said OTDOA measurement cell sends to said terminal.
A kind of observed time difference OTDOA method of measurement, this method comprises:
The location server is given with the information reporting of this place, a plurality of sub-districts frequency on being operated in a plurality of sub-districts the time in the terminal;
The terminal receives the OTDOA auxiliary data of the information that comprises the OTDOA measurement cell of location-server transmission, carries out OTDOA according to this OTDOA auxiliary data and measures; Said OTDOA measurement cell is the OTDOA measurement cell of location-server according to the Information Selection of the frequency of terminal to report.
A kind of positioning assistance data sending method, this method comprises:
The information of place, a plurality of sub-district frequency that the location-server receiving terminal sends; These a plurality of sub-districts are a plurality of sub-districts at this terminal works place;
Location-server is that observed time difference OTDOA measurement cell is selected at said terminal according to the information of place, said a plurality of sub-district frequency;
The OTDOA auxiliary data that location-server will comprise the information of said OTDOA measurement cell sends to said terminal.
A kind of OTDOA measurement mechanism, this device comprises:
The cell information transmitting element is used for confirming 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 of the information that comprises the OTDOA measurement cell that location-server sends, and carries out OTDOA according to this OTDOA auxiliary data and measures; Said OTDOA measurement cell is the OTDOA measurement cell of location-server according to the Information Selection of said 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 said sub-district is that observed time difference OTDOA measurement cell is selected at said terminal;
The auxiliary data transmitting element is used for the OTDOA auxiliary data of the information that comprises said OTDOA measurement cell is sent to said terminal.
A kind of observed time difference OTDOA measurement mechanism, this device comprises:
Report the unit, be used for when this device is operated on a plurality of sub-districts, give the location server the information reporting of this place, a plurality of sub-district frequency;
Measuring unit is used to receive the OTDOA auxiliary data of the information that comprises the OTDOA measurement cell that location-server sends, and carries out OTDOA according to this OTDOA auxiliary data and measures; Said OTDOA measurement cell is the OTDOA measurement cell of location-server according to the Information Selection of the frequency of terminal to report.
A kind of positioning assistance data dispensing device, this device comprises:
Receiving element, a plurality of sub-districts that are used for the receiving terminal transmission belong to the information of frequency; These a plurality of sub-districts are a plurality of sub-districts at this terminal works place;
Selected cell, the information that is used for according to place, said a plurality of sub-district frequency is that observed time difference OTDOA measurement cell is selected at said terminal;
Transmitting element is used for the OTDOA auxiliary data of the information that comprises said OTDOA measurement cell is sent to said terminal.
A kind of wireless communication system, this system comprises:
The terminal is used for confirming 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 of the information that comprises observed time difference OTDOA measurement cell 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 the OTDOA measurement cell is selected at said terminal according to the information of said sub-district; The OTDOA auxiliary data that will comprise the information of said OTDOA measurement cell sends to said terminal.
Among the present invention; The terminal confirms 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 the OTDOA measurement cell is selected at said terminal according to the information of said sub-district, and the OTDOA auxiliary data that will comprise the information of said OTDOA measurement cell sends to the terminal, and the terminal is carried out OTDOA according to this OTDOA auxiliary data and measured.It is thus clear that; In this programme; The 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 the terminal is that the OTDOA measurement cell is selected at the terminal, and OTDOA is carried out when measuring to this OTDOA measurement cell in follow-up terminal, because this OTDOA measurement cell is can detect the sub-district of selecting the sub-district of signal from the terminal; Therefore the terminal can not occur owing to detect less than the signal of OTDOA measurement cell 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.
Among the present invention; Be that terminal works is on a plurality of sub-districts the time under carrier aggregation scene; The terminal will this place, a plurality of sub-districts frequency information reporting give the location server; The frequency information that location-server receives is that the OTDOA measurement cell is selected at the terminal, and the OTDOA auxiliary data of information that will comprise the OTDOA measurement cell of selection sends to the terminal, and the terminal is carried out OTDOA according to this OTDOA auxiliary data and measured.It is thus clear that, in this programme, when the terminal is measured the OTDOA measurement cell, do not need network configuration to measure GAP, thereby simplified the complexity of handling, also practiced thrift the relevant Signalling exchange of measuring the GAP configuration, guaranteed the normal transceive data of user.
Description of drawings
Fig. 1 is an OTDOA positioning principle sketch map in the prior art;
Fig. 2 is the positioning flow sketch map that UE triggers in the prior art;
The method flow sketch map that Fig. 3 provides for the embodiment of the invention;
Another method schematic flow sheet that Fig. 4 provides for the embodiment of the invention;
Fig. 5 is the positioning flow sketch map of the embodiment of the invention;
The system configuration sketch map that Fig. 6 provides for the embodiment of the invention;
The apparatus structure sketch map that Fig. 7 provides for the embodiment of the invention;
Another apparatus structure sketch map that Fig. 8 provides for the embodiment of the invention;
The another method flow sketch map that Fig. 9 provides for the embodiment of the invention;
The method flow sketch map again that Figure 10 provides for the embodiment of the invention;
The another apparatus structure sketch map that Figure 11 provides for the embodiment of the invention;
The apparatus structure sketch map again that Figure 12 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; The terminal sends to location-server with the information that self can detect the sub-district of signal, and location-server is that the OTDOA measurement cell is selected at the terminal according to the information of said 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: the terminal confirms 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: the terminal receives the OTDOA auxiliary data of the information that comprises the OTDOA measurement cell of location-server transmission, carries out OTDOA according to this OTDOA auxiliary data and measures; Said OTDOA measurement cell is the OTDOA measurement cell of location-server according to the Information Selection of said sub-district.Here, carry out OTDOA according to this OTDOA auxiliary data and measure, be meant, measure the PRS of OTDOA measurement cell, thereby obtain RSTD according to prior art.
In the step 30; As a kind of execution mode; The terminal can be when OTDOA measures failure, and the information that self can be detected the sub-district of signal sends to location-server, and is concrete; Before the terminal confirmed that self can detect the sub-district of signal, the terminal received the OTDOA auxiliary data that location-server sends; The terminal is behind the signal that detects less than the indicated all or part of OTDOA measurement cell of said OTDOA auxiliary data; Confirm that self can detect the sub-district of signal, then according to confirming 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 cell can preestablish.Concrete, the terminal can through 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, the terminal can confirm that self can detect the sub-district of signal when needs obtain the OTDOA auxiliary data, then according to confirming that the result sends to location-server with the information that self can detect the sub-district of signal.Concrete, the message of request for assistance data message or other redeterminations etc. can be passed through in the terminal, and the information that self can be detected the sub-district of signal sends to location-server.
In the step 30; When the terminal sends to location-server with the information that self can detect the sub-district of signal; Can at first be 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 is carried in the corresponding message and sends to location-server.For example, can be with the sub-district that self can detect 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 send at the terminal comprises: the information that the physical label of this sub-district and frequency etc. can this sub-districts of unique identification.
Under carrier aggregation scene; Terminal works is on a plurality of sub-districts; In the step 30, the terminal confirms that self can detect the sub-district of signal, is specially: the terminal confirms that the sub-district that self can detect signal is detected each sub-district on this place, a plurality of sub-district frequency.
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 the OTDOA measurement cell is selected at said terminal according to the information of said sub-district, and promptly location-server is selected the OTDOA measurement cell from said sub-district;
Step 42: the OTDOA auxiliary data that location-server will comprise the information of said OTDOA measurement cell sends to said terminal.
In the step 40; Location-server can be after the OTDOA auxiliary data be sent at the terminal; This terminal that receiving terminal sends can detect the information of the sub-district of signal, and is concrete, can detect at this terminal that the location-server receiving terminal sends before the information of sub-district of signal; Location-server receives the Location Request that send at the terminal; The OTDOA auxiliary data of information that will comprise the OTDOA measurement cell of generation sends to the terminal, and the OTDOA measurement cell of this generation is the OTDOA measurement cell that location-server is confirmed according to prior art, promptly according to residing sub-district, terminal with and the OTDOA measurement cell confirmed of the frequency range ability information supported.
In the step 41, location-server is that the OTDOA measurement cell is selected at said terminal according to the information of said sub-district, and its concrete realization can be following:
Location-server selects to set the best sub-district of a number signal quality according to the information of said sub-district from said sub-district, with the sub-district of selection as the OTDOA measurement cell.
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 of selectable OTDOA measurement cell as long as guarantee location-server, so that the follow-up positional information that can calculate UE.
In the step 40, location-server can through 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.
Consider that under the scene of multicarrier terminal works is on a plurality of frequencies, if the OTDOA measurement cell is on the carrier wave of the work at terminal; The acquisition process of measuring GAP just need not carried out in the terminal; Can directly carry out relevant measurement, for this reason, need the situation of terminal to report work carrier wave.In view of the above, the present invention provides another kind of OTDOA method of measurement, and is as shown in Figure 9, may further comprise the steps:
Step 90: the location server is given with the information reporting of this place, a plurality of sub-districts frequency on being operated in a plurality of sub-districts the time in the terminal;
Step 91: the terminal receives the OTDOA auxiliary data of the information that comprises the OTDOA measurement cell of location-server transmission, carries out OTDOA according to this OTDOA auxiliary data and measures; This OTDOA measurement cell is the OTDOA measurement cell of location-server according to the Information Selection of the frequency of terminal to report.
Corresponding, the present invention provides another kind of positioning assistance data sending method, and is shown in figure 10, may further comprise the steps:
Step 101: the information of place, a plurality of sub-district frequency that the location-server receiving terminal sends; These a plurality of sub-districts are a plurality of sub-districts at this terminal works place; Information according to place, a plurality of sub-district frequency that receives is that the OTDOA measurement cell is selected at the terminal; Specifically can selective reception to frequency on the sub-district as the OTDOA measurement cell;
Step 102: the OTDOA auxiliary data of information that location-server will comprise the OTDOA measurement cell of selection sends to the terminal.
Specify in the face of the present invention down:
Provide a kind of improved OTDOA localization method among the present invention.Main thought is when the auxiliary data that location-server gives is found to use in the terminal; The notice location-server; And the information that oneself can detect the sub-district of signal is provided, supply location-server for referencial use for this terminal selection suitable OTDOA reference cell and the adjacent sub-district of OTDOA again.The terminal also can initiatively provide oneself can detect the information of the sub-district of signal.
The main behavior of end side is following:
The OTDOA auxiliary data that location-server is sent is received at the terminal; The information that has wherein comprised the OTDOA measurement cell; If the signal of these OTDOA measurement cell is found to detect in the terminal; Thereby when can't obtain the SFN of OTDOA measurement cell, then send message informing, and provide the cell list that oneself can detect signal for the location-server reference to location-server.
The terminal can be through 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.
The 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 of OTDOA measurement cell before location-server provides the cell list that oneself can detect signal.
The main behavior of location-server (E-SMLC) side is following:
Location-server is received when the UE that sends at the terminal can detect the cell list of signal; Again be that the OTDOA measurement cell is selected at the terminal according to this cell list; Comprise and select OTDOA reference cell and/or the adjacent sub-district of OTDOA, and the information of the OTDOA measurement cell of selecting is sent to the terminal through LPP message.
E-SMLC is when selecting the OTDOA measurement cell for the 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 following:
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: the signal of the indicated OTDOA measurement cell of OTDOA auxiliary data is confirmed to detect in the terminal;
Step 3: the terminal is sent wrong Indication message through LPP to E-SMLC, wherein carries the tabulation that the information that can't detect the OTDOA measurement cell and terminal can detect the sub-district of signal.
Particularly, the ASN.1 formal definition of mistake Indication message is following:
Comprising public error message (commonIEsError), external protocol data unit sequence number (EPDU-Sequence) etc.; Newly-increased detected cells tabulation (DetectCellList; Be the tabulation that the terminal can detect the sub-district of signal) in the sub-district number can be decided to be other numerical value, be 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 send at the terminal; Again be that according to the cell information that carries in the wrong Indication message this terminal selects the OTDOA measurement cell, and send to the terminal through the OTDOA auxiliary data that LPP message (OTDOA-ProvideAssistanceData) will comprise the information of OTDOA measurement cell;
Step 5: after the OTDOA auxiliary data is received at the terminal, proceed the OTDOA surveying work according to the OTDOA auxiliary data;
Step 6: accomplish follow-up relevant positioning function.
Embodiment two:
As shown in Figure 5, idiographic flow is following:
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: the signal of the indicated OTDOA measurement cell of OTDOA auxiliary data is confirmed to detect in the terminal;
Step 3: the terminal is sent aborted message through LPP to E-SMLC, wherein carries the tabulation that the information that can't detect the OTDOA measurement cell and terminal can detect the sub-district of signal.
Particularly, the ASN.1 of aborted message definition is as follows:
Comprising common interrupt information (commonIEsAbort), external protocol data unit sequence number (EPDU-Sequence) etc.; Newly-increased detected cells tabulation (DetectCellList; Be the tabulation that the terminal can detect the sub-district of signal) in the sub-district number can be decided to be other numerical value, be 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 send at the terminal; The cell information that heavily carries according to aborted message is that the OTDOA measurement cell is selected at this terminal again, and sends to the terminal through the OTDOA auxiliary data that LPP message (OTDOA-ProvideAssistanceData) will comprise the information of OTDOA measurement cell;
Step 5: after the OTDOA auxiliary data is received at the terminal, proceed the OTDOA surveying work according to the OTDOA auxiliary data;
Step 6: accomplish 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: the signal of the indicated OTDOA measurement cell of OTDOA auxiliary data is confirmed to detect in the terminal;
Step 3: request for assistance data message is sent to E-SMLC again through LPP in the terminal, wherein carries the tabulation that the information that can't detect the OTDOA measurement cell and terminal can detect the sub-district of signal.
Particularly, the ASN.1 of request for assistance data message definition is as follows:
Comprising public request auxiliary data information (commonIEsRequestAssistanceData); Wherein can select is the request of data of which method; Like 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 the terminal can detect the tabulation of the sub-district of signal) can be decided to be other numerical value, is 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 send at the terminal; Again be that according to the cell information that carries in the request for assistance data message this terminal selects the OTDOA measurement cell, and send to the terminal through the OTDOA auxiliary data that LPP message (OTDOA-ProvideAssistanceData) will comprise the information of OTDOA measurement cell;
Step 5: after the OTDOA auxiliary data is received at the terminal, proceed the OTDOA surveying work according to the OTDOA auxiliary data;
Step 6: accomplish follow-up relevant positioning function.
Embodiment four:
Step 1: request for assistance data message is sent to E-SMLC in the terminal, 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 send at the terminal; Be that according to the cell information that carries in the request for assistance data message this terminal selects the OTDOA measurement cell, and send to the terminal through the OTDOA auxiliary data that LPP message (OTDOA-ProvideAssistanceData) will comprise the information of OTDOA measurement cell;
Step 3: after the OTDOA auxiliary data is received at the terminal, carry out the OTDOA surveying work according to the OTDOA auxiliary data;
Step 4: accomplish follow-up relevant positioning function.
Embodiment five:
Step 1: the message that redetermination is sent to E-SMLC in the terminal, wherein carried terminal can detect the tabulation of the sub-district of signal; Need carry following information in the new information:
Wherein the sub-district number in the detected cells tabulation (DetectCellList, promptly the terminal can detect the tabulation of the sub-district of signal) can be decided to be other numerical value, is 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 send at the terminal; Be that according to the cell information that carries in the new information this terminal selects the OTDOA measurement cell, and send to the terminal through the OTDOA auxiliary data that LPP message (OTDOA-ProvideAssistanceData) will comprise the information of OTDOA measurement cell;
Step 3: after the OTDOA auxiliary data is received at the terminal, carry out the OTDOA surveying work according to the OTDOA auxiliary data;
Step 4: accomplish follow-up relevant positioning function.
Embodiment six:
As shown in Figure 5, idiographic flow is following:
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: the signal of the indicated OTDOA measurement cell of OTDOA auxiliary data is confirmed to detect in the terminal;
Step 3: the terminal is sent positional information through LPP to E-SMLC and is given information, and wherein carries the tabulation that the information that can't detect the OTDOA measurement cell and terminal can detect the sub-district of signal.
Particularly, the ASN.1 definition that gives information of positional information is as follows:
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 the terminal can detect the tabulation of the sub-district of signal) can be decided to be other numerical value, is 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 send at the terminal gives information; The cell information that carries in giving information according to positional information is that the OTDOA measurement cell is selected at this terminal again, and sends to the terminal through the OTDOA auxiliary data that LPP message (OTDOA-ProvideAssistanceData) will comprise the information of OTDOA measurement cell;
Step 5: after the OTDOA auxiliary data is received at the terminal, proceed the OTDOA surveying work according to the OTDOA auxiliary data;
Step 6: accomplish follow-up relevant positioning function.
Embodiment seven:
Under carrier aggregation scene, a terminal works is on 3 sub-districts, and the frequency of these three sub-districts is F1, F2, F3.
Step 1: when the terminal positions, 3 operating frequency F1 of terminal to report, F2, F3 give the location server.
Step 2: location-server is selected F1, F2, and the sub-district on these three frequencies of F3, as the OTDOA measurement cell at this terminal, and the auxiliary data of information that will comprise the OTDOA measurement cell of selection sends to the terminal.
Step 3: after the terminal receives auxiliary data, carry out relevant OTDOA and measure.
Embodiment eight:
Under carrier aggregation scene, a terminal works is on 3 sub-districts, and the frequency of these three sub-districts is F1, F2, F3.
Step 1: when the terminal positioned, F1 was detected at the terminal, F2, and all sub-districts on three frequencies of F3, and the information of detected sub-district issued location-server.
Step 2: location-server is that in the sub-district of terminal to report this terminal selects the OTDOA measurement cell, and the auxiliary data of information that will comprise the OTDOA measurement cell of selection sends to the terminal.
Step 3: after the terminal receives auxiliary data, carry out relevant OTDOA and measure.
Referring to Fig. 6, the embodiment of the invention also provides a kind of wireless communication system, and this system comprises:
Location-server 61 is used for the information that this terminal that receiving terminal sends can detect the sub-district of signal, is that the OTDOA measurement cell is selected at said terminal according to the information of said sub-district; The OTDOA auxiliary data that will comprise the information of said OTDOA measurement cell sends to said 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 confirming 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;
This device also comprises:
Said cell information transmitting element 70 is used for:
Behind the signal that detects less than the indicated all or part of OTDOA measurement cell of said OTDOA auxiliary data, confirm that self can detect the sub-district of signal.
Said cell information transmitting element 70 is used for:
When needs obtain the OTDOA auxiliary data, confirm that self can detect the sub-district of signal.
Said cell information transmitting element 70 is used for:
Through 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.
Said 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.
Said cell information transmitting element 70 is used for:
When this device is operated on a plurality of sub-districts, confirm that the sub-district that self can detect signal is detected each sub-district on this place, a plurality of sub-district frequency.
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 said sub-district is that observed time difference OTDOA measurement cell is selected at said terminal;
Auxiliary data transmitting element 82 is used for the OTDOA auxiliary data of the information that comprises said OTDOA measurement cell is sent to said terminal.
Said auxiliary data transmitting element 82 also is used for:
Can detect at this terminal that receiving terminal sends before the information of sub-district of signal, receive the Location Request that send at the terminal, the OTDOA auxiliary data of information that will comprise the OTDOA measurement cell of generation sends to the terminal.
Said OTDOA cell selecting unit 81 is used for:
From said sub-district, select to set the best sub-district of a number signal quality according to the information of said sub-district, with the sub-district of selection as the OTDOA measurement cell.
Said cell information receiving element 80 is used for:
Through 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.
Said OTDOA measurement cell comprises: the adjacent sub-district of OTDOA reference cell and/or OTDOA.
Referring to Figure 11, the embodiment of the invention also provides a kind of observed time difference OTDOA measurement mechanism, and this device comprises:
Report unit 110, be used for when this device is operated on a plurality of sub-districts, give the location server the information reporting of this place, a plurality of sub-district frequency;
Measuring unit 111 is used to receive the OTDOA auxiliary data of the information that comprises the OTDOA measurement cell that location-server sends, and carries out OTDOA according to this OTDOA auxiliary data and measures; Said OTDOA measurement cell is the OTDOA measurement cell of location-server according to the Information Selection of the frequency of terminal to report.
Referring to Figure 12, the embodiment of the invention also provides a kind of positioning assistance data dispensing device, and this device comprises:
Receiving element 120, a plurality of sub-districts that are used for the receiving terminal transmission belong to the information of frequency; These a plurality of sub-districts are a plurality of sub-districts at this terminal works place;
Transmitting element 122 is used for the OTDOA auxiliary data of the information that comprises said OTDOA measurement cell is sent to said terminal.
To sum up, beneficial effect of the present invention comprises:
In the scheme that the embodiment of the invention provides; The terminal confirms 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 the OTDOA measurement cell is selected at said terminal according to the information of said sub-district, and the OTDOA auxiliary data that will comprise the information of said OTDOA measurement cell sends to the terminal, and the terminal is carried out OTDOA according to this OTDOA auxiliary data and measured.It is thus clear that; In this programme; The 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 the terminal is that the OTDOA measurement cell is selected at the terminal, and OTDOA is carried out when measuring to this OTDOA measurement cell in follow-up terminal, because this OTDOA measurement cell is can detect the sub-district of selecting the sub-district of signal from the terminal; Therefore the terminal can not occur owing to detect less than the signal of OTDOA measurement cell 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 through 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 ability 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 on computer or other programmable devices, carrying out 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 inventive concept could of cicada, then can make other change and modification to these embodiment.So accompanying claims is intended to be interpreted as all changes and the modification that comprises 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, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (29)
1. observed time difference OTDOA method of measurement is characterized in that this method comprises:
The terminal confirms 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;
The terminal receives the OTDOA auxiliary data of the information that comprises the OTDOA measurement cell of location-server transmission, carries out OTDOA according to this OTDOA auxiliary data and measures; Said OTDOA measurement cell is the OTDOA measurement cell of location-server according to the Information Selection of said sub-district.
2. the method for claim 1 is characterized in that, before the terminal confirmed that self can detect the sub-district of signal, this method further comprised:
The terminal receives the OTDOA auxiliary data that location-server sends;
Said terminal confirms that the sub-district that self can detect signal comprises:
The terminal confirms that self can detect the sub-district of signal behind the signal that detects less than the indicated all or part of OTDOA measurement cell of said OTDOA auxiliary data.
3. the method for claim 1 is characterized in that, said terminal confirms that the sub-district that self can detect signal comprises:
When the terminal obtains the OTDOA auxiliary data at needs, confirm that self can detect the sub-district of signal.
4. the method for claim 1 is characterized in that, the terminal sends to location-server with the information that self can detect the sub-district of signal and comprises:
Sort the sub-district that self can detect signal in the terminal according to the cell signal quality, and the information of the sub-district after will sorting sends to location-server.
5. like arbitrary described method among the claim 1-4; It is characterized in that; The terminal is through 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. like arbitrary described method among the claim 1-4, it is characterized in that the information that the terminal can detect the sub-district of signal comprises: the physical label of this sub-district and frequency.
7. like arbitrary described method among the claim 1-4, it is characterized in that said terminal confirms that self can detect the sub-district of signal, specifically comprises:
When terminal works was on a plurality of sub-districts, the terminal confirmed that the sub-district that self can detect signal is detected each sub-district on this place, a plurality of sub-district frequency.
8. 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 observed time difference OTDOA measurement cell is selected at said terminal according to the information of said sub-district;
The OTDOA auxiliary data that location-server will comprise the information of said OTDOA measurement cell sends to said terminal.
9. method as claimed in claim 8 is characterized in that, can detect at 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 send at the terminal, and the OTDOA auxiliary data of information that will comprise the OTDOA measurement cell of generation sends to the terminal.
10. method as claimed in claim 8 is characterized in that, said location-server is that said terminal selects the OTDOA measurement cell to comprise according to the information of said sub-district:
Location-server selects to set the best sub-district of a number signal quality according to the information of said sub-district from said sub-district, with the sub-district of selection as the OTDOA measurement cell.
11. like arbitrary described method among the claim 8-10; It is characterized in that; Location-server is through 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.
12., it is characterized in that said OTDOA measurement cell comprises like arbitrary described method among the claim 8-10: the adjacent sub-district of OTDOA reference cell and/or OTDOA.
13. an observed time difference OTDOA method of measurement is characterized in that this method comprises:
The location server is given with the information reporting of this place, a plurality of sub-districts frequency on being operated in a plurality of sub-districts the time in the terminal;
The terminal receives the OTDOA auxiliary data of the information that comprises the OTDOA measurement cell of location-server transmission, carries out OTDOA according to this OTDOA auxiliary data and measures; Said OTDOA measurement cell is the OTDOA measurement cell of location-server according to the Information Selection of the frequency of terminal to report.
14. a positioning assistance data sending method is characterized in that, this method comprises:
The information of place, a plurality of sub-district frequency that the location-server receiving terminal sends; These a plurality of sub-districts are a plurality of sub-districts at this terminal works place;
Location-server is that observed time difference OTDOA measurement cell is selected at said terminal according to the information of place, said a plurality of sub-district frequency;
The OTDOA auxiliary data that location-server will comprise the information of said OTDOA measurement cell sends to said terminal.
15. an observed time difference OTDOA measurement mechanism is characterized in that this device comprises:
The cell information transmitting element is used for confirming 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 of the information that comprises the OTDOA measurement cell that location-server sends, and carries out OTDOA according to this OTDOA auxiliary data and measures; Said OTDOA measurement cell is the OTDOA measurement cell of location-server according to the Information Selection of said sub-district.
16. device as claimed in claim 15 is characterized in that, this device also comprises:
The Data Receiving unit is used for before confirming self can to detect the sub-district of signal, receiving the OTDOA auxiliary data that location-server sends;
Said cell information transmitting element is used for:
Behind the signal that detects less than the indicated all or part of OTDOA measurement cell of said OTDOA auxiliary data, confirm that self can detect the sub-district of signal.
17. device as claimed in claim 15 is characterized in that, said cell information transmitting element is used for:
When needs obtain the OTDOA auxiliary data, confirm that self can detect the sub-district of signal.
18., it is characterized in that said cell information transmitting element is used for like arbitrary described device among the claim 15-17:
Through 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.
19., 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 like arbitrary described device among the claim 15-17.
20., it is characterized in that said cell information transmitting element is used for like arbitrary described device among the claim 15-17:
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.
21., it is characterized in that said cell information transmitting element is used for like arbitrary described device among the claim 15-17:
When this device is operated on a plurality of sub-districts, confirm that the sub-district that self can detect signal is detected each sub-district on this place, a plurality of sub-district frequency.
22. 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 said sub-district is that observed time difference OTDOA measurement cell is selected at said terminal;
The auxiliary data transmitting element is used for the OTDOA auxiliary data of the information that comprises said OTDOA measurement cell is sent to said terminal.
23. device as claimed in claim 22 is characterized in that, said auxiliary data transmitting element also is used for:
Can detect at this terminal that receiving terminal sends before the information of sub-district of signal, receive the Location Request that send at the terminal, the OTDOA auxiliary data of information that will comprise the OTDOA measurement cell of generation sends to the terminal.
24. device as claimed in claim 22 is characterized in that, said OTDOA cell selecting unit is used for:
From said sub-district, select to set the best sub-district of a number signal quality according to the information of said sub-district, with the sub-district of selection as the OTDOA measurement cell.
25., it is characterized in that said cell information receiving element is used for like arbitrary described device among the claim 22-24:
Through 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.
26., it is characterized in that said OTDOA measurement cell comprises like arbitrary described device among the claim 22-24: the adjacent sub-district of OTDOA reference cell and/or OTDOA.
27. an observed time difference OTDOA measurement mechanism is characterized in that this device comprises:
Report the unit, be used for when this device is operated on a plurality of sub-districts, give the location server the information reporting of this place, a plurality of sub-district frequency;
Measuring unit is used to receive the OTDOA auxiliary data of the information that comprises the OTDOA measurement cell that location-server sends, and carries out OTDOA according to this OTDOA auxiliary data and measures; Said OTDOA measurement cell is the OTDOA measurement cell of location-server according to the Information Selection of the frequency of terminal to report.
28. a positioning assistance data dispensing device is characterized in that, this device comprises:
Receiving element, a plurality of sub-districts that are used for the receiving terminal transmission belong to the information of frequency; These a plurality of sub-districts are a plurality of sub-districts at this terminal works place;
Selected cell, the information that is used for according to place, said a plurality of sub-district frequency is that observed time difference OTDOA measurement cell is selected at said terminal;
Transmitting element is used for the OTDOA auxiliary data of the information that comprises said OTDOA measurement cell is sent to said terminal.
29. a wireless communication system is characterized in that, this system comprises:
The terminal is used for confirming 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 of the information that comprises observed time difference OTDOA measurement cell 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 the OTDOA measurement cell is selected at said terminal according to the information of said sub-district; The OTDOA auxiliary data that will comprise the information of said OTDOA measurement cell sends to said terminal.
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| CN2012101375388A CN102724699A (en) | 2011-05-05 | 2012-05-04 | OTDOA measurement, and positioning assist data transmission method, system and apparatus |
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| CN2011101157656A CN102186191A (en) | 2011-05-05 | 2011-05-05 | Methods and devices for measuring OTDOA (observed time difference of arrival) and sending positioning assistance data and system |
| CN201110115765.6 | 2011-05-05 | ||
| CN2012101375388A CN102724699A (en) | 2011-05-05 | 2012-05-04 | OTDOA measurement, and positioning assist data transmission method, system and apparatus |
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| CN2012101375388A Pending CN102724699A (en) | 2011-05-05 | 2012-05-04 | OTDOA measurement, and positioning assist data transmission method, system and apparatus |
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| WO2020163983A1 (en) * | 2019-02-11 | 2020-08-20 | Nokia Shanghai Bell Co., Ltd. | Enhanced positioning mechanism based on otdoa |
| CN111586833A (en) * | 2019-02-15 | 2020-08-25 | 电信科学技术研究院有限公司 | Positioning method, device, terminal, base station and management function entity |
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