CN1787679B - Locating method for determining user equipment position for radio network controller - Google Patents
Locating method for determining user equipment position for radio network controller Download PDFInfo
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Abstract
A locating method for determining armed location user devices by a radio network controller includes: RNC starts measurement of the loop time delay of an armed location UE, Node B tests the arriving angle of the UE, RNC designs the threshold value, when the measurement value of the loop time delay of the armed location UE is smaller than the preset threshold value, RNC locations the user device based on the loop time delay and the value of the arriving angle, in which, RNC processes multiple possible locating methods so as to decide suitable locating methods for UE at any positions in a localarea.
Description
Technical field
The present invention relates to 3-G (Generation Three mobile communication system), the localization method of locating user devices (UE) is treated in decision more specifically to radio network controller (RNC).
Background technology
In the technical specification of existing 3GPP, defined cell ID (Cell-ID), observation arrives time difference (OTDOA) and three kinds of localization methods of agps system (A-GPS), wherein cell ID (Cell-ID) method is to give core network (CN) with the sign of sub-district (Cell) in the residing Node B of the subscriber equipment that is positioned (UE) as the position message of the subscriber equipment that is positioned, be characterized in that this location does not need calculating just can access positional information, therefore simple and positioning accuracy is low, its positioning accuracy generally at hundreds of rice to several kms, depend on the radius of society that cellular network is designed; The position that the time difference that subscriber equipment observes arrival time difference (OTDOA) method arrive tested subscriber equipment (UE) by measurement from least three Node B signal transmitteds is calculated tested subscriber equipment (UE), its precision generally within hundreds of rice, depends on the multipath in signal bandwidth, the wireless propagation environment, available measurement etc.; Agps system (A-GPS) localization method is that GPS receiver is combined with subscriber equipment, the location that subscriber equipment (UE) implemented in the startup of the GPS receiver of accelerating by the relevant parameter of satellite in the relevant global positioning system that cellular network provided and search, be characterized in that positioning accuracy is higher relatively, generally within tens meters, but cost is higher.
A kind of low spreading rate time-division duplex of LCR-TDD system (LCR-TDD CDMA) system, 3GPP has formulated the corresponding techniques standard to this LCR-TDD code division multiple access.This LCR-TDD code division multiple access system can adopt smart antenna (SA) to be installed on Node B.Smart antenna (SA) is the aerial array that is made of a plurality of low-gain antennas unit, it utilizes Digital Signal Processing that a plurality of different users are implemented beam shaping and produces a plurality of different spaces wave beams, the maximum direction of each wave beam is automatically aimed at user separately, and zero receive direction aligning interference radiating way, suppress co-channel interference, multiple access interference and multipath fading, to realize significantly improving the purpose of signal interference ratio, enhanced system capacity.
Because smart antenna adopts the array antenna of the different array numbers in certain space position, cause same radio signal to arrive each array element and have different wave path-differences, the signal of different directions produces different array responses after being shaped by array antenna beam, thereby can estimate the angle of arrival (AOA) of ripple.The smart antenna receiving system can be taked different algorithms, can realize in radio frequency, intermediate frequency or base band respectively, so that the signal distinguishing of different directions is come, disturbs thereby reduce, and improves systematic function.
In the LCR-TDD system, OTDOA measures the position of calculating tested subscriber equipment (UE) by the time difference that the DwPTS signal that is sent from least three Node B is arrived tested subscriber equipment (UE).Because the subscriber equipment to be positioned (UE) at Serving cell is nearer and relative to contiguous sub-district from this Serving cell, this means that the DwPTS signal of receiving this Serving cell is better than the DwPTS signal of adjacent cell, cause subscriber equipment to be positioned (UE) can not receive relatively away from the contiguous DwPTS signal that the sub-district sent.In order to handle the problem that above-mentioned subscriber equipment to be positioned (UE) detects adjacent cell, several feasible solutions have been proposed now.At first, can utilize the transmission technology of idle period downlink (IPDL), being Serving cell temporarily stops to launch its DwPTS signal and adjacent cell normally sends the DwPTS signal in some specific radio frames, the number of the adjacent cell DwPTS signal that UE to be positioned by this can detect has increased, improve certainty of measurement, and then improved positioning accuracy.Secondly, Location Measurement Unit or position calculation entity can adopt the received superposed signals from Serving cell and its each neighbor cell of technical finesse subscriber equipment to be positioned (UE) such as interference delete, in brief, promptly from the signal that subscriber equipment to be positioned (UE) receives, extract earlier the DwPTS signal of the strongest sub-district (generally being its Serving cell), from the signal that locating user devices (UE) receives, remove the DwPTS signal component of strong sub-district then; Then in remaining signal, extract the DwPTS signal of time strong sub-district, remove the DwPTS signal component of time strong sub-district then; The influence of so deleting the DwPTS signal of the strongest sub-district of current demand signal successively, thereby the DwPTS signal of the more weak sub-district of extraction signal as much as possible.Except above-mentioned technology, also have some other technology be used to handle subscriber equipment to be positioned (UE) can not receive relatively away from the problem of the DwPTS signal that the sub-district sent, yet, above-mentioned technology but can not address this problem fully, promptly in some specific zones, subscriber equipment to be positioned (UE) can detect adjacent cell number may still can not satisfy the requirement of OTDOA location, for example, for the IPDL technology, such zone is near the part in edge of Serving cell; For the interference delete technology, such zone is near the part in center of sub-district.
A large amount of research and test have been done to the performance of above-mentioned several solutions of mentioning by Cambridge navigation system company, these results are embodied among the David Bartlett disclosed " auditory analysis of OTDOA localization method in the 3G UMTS network ", under the situation of the parameter configuration that this report adopted, basic OTDOA localization method does not have enough available cell to finish the location in about 26% zone; When adopting the IPDL technology, the OTDOA localization method does not have enough available cell to finish the location about 6% zone greatly; And when adopting the technology of interference delete, the OTDOA localization method does not have enough available cell to be used to finish the location about 5% zone greatly.
Although above-mentioned report shows IPDL technology or interference delete technology and has improved the problem of subscriber equipment to be positioned (UE) the reception DwPTS signal that adjacent cell sent in the OTDOA localization method to a certain extent, but in some special region, the number of the DwPTS signal that adjacent cell sent that subscriber equipment to be positioned (UE) can receive still can not satisfy the requirement of OTDOA localization method, and RNC must select other localization method that UE is implemented the location.More defined in the technical specification according to existing 3GPP at the UE place or at the measured value at Node B place, RNC can start some and relatively simply treat the method that positioning UE is implemented the location, for example RNC can obtain the loop time delay (RTT) and the angle of arrival (AOA) of UE to be positioned by these measured values, and then obtains the location estimation of UE to be positioned.In addition, RNC can also adopt some mixed methods, and utilization as much as possible can obtain measured value, for example, RNC is after obtaining the loop time delay of UE to be positioned (RTT) and the angle of arrival (AOA), and the OTDOA measured value that can measure in conjunction with UE to be positioned is realized the raising to positioning accuracy.
In the LCR-TDD system, measurement for the loop time delay (RTT) of realizing treating positioning UE, RNC can measure the time deviation of UE to be positioned respectively by Iub interface special measurement message request Node B, UE to be positioned measures its time lead by Uu interface RRC signaling (measurement control messages) request; The time deviation of the comprehensive UE to be positioned of RNC and Timing Advance then calculate the loop time delay (RTT) of this UE to be positioned.
In the technical specification of existing 3GPP, defined the localization method that arrives the time difference (OTDOA) based on observation, this method exist subscriber equipment to be positioned (UE) can not receive relatively away from the problem of the DwPTS signal that the sub-district sent.Technology such as IPDL and interference delete has been improved OTDOA The Application of Technology regional extent to a certain extent, but still there are some zones, the number of cells that can be used for the OTDOA localization method causes RNC can not only rely on the localization method of OTDOA to obtain the position of UE to be positioned less than 3.
In the technical specification of existing 3GPP, for the localization method of OTDOA, above-mentioned technical specification does not define RNC and how to select subscriber equipment to be positioned (UE) transmission to need the sub-district of UE measurement to be positioned so that need the cell list of UE measurement to be positioned to subscriber equipment to be positioned (UE) transmission by broadcast or measurement control messages.The most direct a kind of execution mode is Serving cell and its all adjacent cell that generally can comprise UE to be positioned at above-mentioned cell list, UE to be positioned need carry out the measurement of OTDOA to all sub-districts in the tabulation, there is such problem in this kind mode, promptly when the number of cells that can be used for the OTDOA localization method is smaller, UE to be positioned has done a lot of useless measuring operation, causes wasting battery electric quantity and handles resource etc.
In the LCR-TDD system, for the loop time delay (RTT) of measuring UE to be positioned, RNC can measure the time deviation of UE to be positioned respectively by Iub interface special measurement message request Node B, UE to be positioned measures its time lead by Uu interface RRC signaling request.In the technical specification of existing 3GPP, RNC sends in the special measurement message of Node B and comprises Connection Frame Number (CFN), and it is used to set Node B and measures the time deviation of UE to be positioned in specific radio frames; Simultaneously, Node B is to also comprising information unit CFN in the response message of RNC special measurement message, and the time deviation that Node B measures by this information unit report RNC is the measured value to that radio frames.In the technical specification of existing 3GPP, UE to be positioned measures in the response message of control messages and the measurement report message RNC and comprises information unit SFN, and the Timing Advance that UE to be positioned measures by this information unit report RNC is the measured value to that radio frames; But RNC sends to the information unit that does not comprise in the measurement control messages of UE to be positioned about SFN, and just RNC can not control that UE to be positioned measures and the Timing Advance of report specific radio frames.Therefore, RNC can not be synchronously to the measurement of time deviation with to the measurement of Timing Advance, although RNC can take some other measure to make the deviation of Measuring Time as much as possible little, on certainty of measurement, still cause certain loss.
Summary of the invention
The purpose of this invention is to provide a kind of RNC is the UE decision localization method to be positioned that is in any position in the sub-district.
According to an aspect of of the present present invention, a kind of radio network controller is determined the localization method of subscriber equipment to be positioned, comprises step:
A) RNC starts the loop time delay of measuring UE to be positioned;
B) Node B measures the angle of arrival of UE;
C) RNC sets threshold value;
D) when the measured value of the loop time delay of UE to be positioned during less than predefined thresholding, RNC is according to the value locating user devices of the loop time delay and the angle of arrival.
According to method of the present invention, the multiple possible localization method of RNC integrated treatment, thereby for being in the suitable localization method of subscriber equipment to be positioned (UE) decision of any position in the sub-district, avoided single localization method can not be applied to the problem of All Ranges in the cell coverage area, guaranteed that the UE to be positioned of any position implements the location in the sub-district to being in the localization method that satisfies required precision or best localization method.
Description of drawings
Fig. 1 is a structure chart of implementing positioning service among the present invention;
Fig. 2 is a schematic diagram for the treatment of locating user devices (UE) location in the LCR-TDD system;
Fig. 3 is an implementing procedure figure based on loop time delay and propagation loss decision localization method of the present invention;
Fig. 4 is another implementing procedure figure based on propagation loss decision localization method of the present invention.
Embodiment
Fig. 1 is the structure chart of enforcement positioning service proposed by the invention, comprising core net (CN) 104, radio network controller (RNC) 103, Node B 102, subscriber equipment (UE) 101, has disposed smart antenna 105 on the NodeB.Communicate via interface Iu113 between core net 104 and the radio network controller 103, communicate via interface Iub 112 between radio network controller 103 and the Node B 102, subscriber equipment 105 is communicated by letter via interface Uu 111 with wireless network.Subscriber equipment 101 comprises Timing Advance measurement module 1011, propagation loss measurement module 1012, OTDOA measurement module 1013; Node B comprises the angle of arrival (AOA) measurement module 1021, time deviation measurement module 1022; RNC comprises localization method decision module 1031 and positioning result computing module 1032 etc., and wherein localization method decision module 1031 is used to determine to implement to locate the method that is adopted, and positioning result computing module 1032 is used for coming calculating location according to the location survey value.
Fig. 2 is the schematic diagram that network is treated locating user devices (UE) location in the LCR-TDD system.UE to be positioned (207) is positioned at the coverage of Serving cell (200), and is distant with the distance R 1～R6 (211～216) of six adjacent cells, and also has nothing in common with each other to the distance of six adjacent cells.Consider complicated wireless propagation environment, path loss L1～L6 (211～216) that six adjacent cells arrive UE to be positioned (207) is complicated more.Zones of different in the Serving cell coverage, the number that UE to be positioned can detected adjacent cell generally is different.
The present invention is directed to existing OTDOA localization method and improve the problem that algorithm still can not guarantee to be applicable to All Ranges in the cell coverage area, the mechanism of the multiple localization method of RNC integrated treatment has been proposed, thereby for being in the suitable localization method of subscriber equipment to be positioned (UE) decision of any position in the sub-district, the UE to be positioned of any position implements the location in the sub-district to being in the localization method that satisfies required precision or best localization method in assurance, be RNC according to the information of known adjacent cell about UE to be positioned or ask UE to be positioned to measure the parameter of its adjacent cell, for UE to be positioned selects suitable localization method and parameter thereof, can be used as RNC selects the parameter of the foundation of localization method to comprise: UE to be positioned is to the loop time delay (RTT) of its Serving cell, and UE to be positioned arrives the propagation loss of its adjacent cell etc.
RNC with the RTT measured value as localization method select according to the time, thereby RNC selects suitable localization method to the threshold value comparison of RTT measured value and certain setting, more than the setting of default thresholding should be in conjunction with concrete sub-district geographical environment and system configuration choose reasonable, promptly as RTT during less than thresholding, UE to be positioned is nearer apart from center of housing estate, and RNC mainly treats positioning UE according to RTT and AOA and carries out position calculation; As RTT during greater than thresholding, UE to be positioned is far away apart from center of housing estate, and RNC can select the measurement of OTDOA and localization method to treat positioning UE to carry out position calculation.
RNC with UE to be positioned to the propagation loss of each adjacent cell as localization method select according to the time, RNC is based on certain thresholding and criterion, judge that those adjacent cells can be used for measurement and the localization method of OTDOA, remove the adjacent cell that does not meet the demands simultaneously, promptly can measure and the adjacent cell of localization method have only (Serving cell) time in OTDOA when RNC detects, RNC locatees according to loop time delay (RTT) and the angle of arrival (AOA) enforcement; Can measure and the adjacent cell of localization method be two (Serving cell and an adjacent cell) time in OTDOA when RNC detects, RNC locatees according to loop time delay (RTT), the angle of arrival (AOA) and available OTDOA measured value enforcement; Can measure and the adjacent cell number of localization method during more than or equal to 3 in OTDOA when RNC detects, RNC implements the location with the OTDOA localization method, and can select RTT and the AOA method as the raising precision.
The present invention is directed in the OTDOA localization method of existing 3GPP standard, RNC measures control messages by the RRC signaling and carries out the cell list that OTDOA measures to the needs UE to be positioned that subscriber equipment to be positioned (UE) sends, generally comprise a plurality of sub-districts, the OTDOA Testing requirement of UE to be positioned may not be satisfied in wherein a part of sub-district, cause the shortcoming of the waste of wireless network resource and UE own resource to be positioned, RNC has been proposed according to the information of known adjacent cell about UE to be positioned or parameter that request UE to be positioned measures its adjacent cell, select to provide the sub-district of better OTDOA measurement and localization method precision to put into cell list by certain criterion, improved performance.
In existing 3GPP technical specification, UE is defined as a kind of UE internal measurement value for the measurement of Timing Advance.Send to the information unit that does not comprise in the measurement control messages of UE to be positioned about radio frames SFN at RNC, just RNC can not control the Timing Advance that UE to be positioned measures specific radio frames, the present invention expands the report of the UE internal measurement among the 3GPP 25.331 criterion message elements, thereby supports RNC to control the Timing Advance that UE to be positioned measures the radio frames of appointment.Specifically:
1) in the trigger event of UE internal measurement report criterion message elements, increases the new incident of a class, this incident is only effective when measuring the UE Timing Advance in the LCR-TDD system, be incident 6h, measure UE in the LCR-TDD system at the Timing Advance of certain specific radio frames and report RNC;
2) in the parameter list of UE internal measurement report criterion message elements, increase a new parameter, promptly need the System Frame Number (SFN) of the radio frames of UE Measuring Time lead;
By top signaling expansion, the RNC of LCR-TDD system is when measuring the RTT of UE to be positioned, RNC can measure the time deviation of UE to be positioned respectively by Iub interface special measurement message request Node B, by Uu interface RRC signaling request UE Measuring Time to be positioned lead.In order to realize treating the time deviation of positioning UE and the synchro measure of Timing Advance, RNC sends in the special measurement message of Node B and comprises information unit CFN, and it is used to set Node B and measures the time deviation of UE to be positioned in the radio frames of appointment; The RRC signaling that RNC sends to UE to be positioned is measured in the internal measurement message elements of control messages event-triggered reporting 6h is set, and comprises the information unit about SFN, and just RNC controls the Timing Advance that UE to be positioned measures specific radio frames.Like this, Node B and UE to be positioned measure the radio frames of appointment respectively.Comprise information unit CFN in the response message of Node B to RNC special measurement message, UE to be positioned measures in the response message of control messages and the measurement report message RNC and comprises information unit SFN, and they are used to confirm that the measurement of reporting is the measured value to that radio frames.
Embodiment
Fig. 3 is implementing procedure figure based on loop time delay and propagation loss decision localization method of the present invention, and RNC receives the Location Request to certain subscriber equipment (UE) from core net, and RNC begins the flow process (300) of localization method decision; RNC at first starts the loop time delay (RTT) and the angle of arrival (AOA) of measuring UE to be positioned, in order to realize measure R TT, RNC can measure the time deviation of UE to be positioned respectively by Iub interface special measurement message request Node B, by Uu interface RRC signaling request UE Measuring Time to be positioned lead, the time deviation of the comprehensive UE to be positioned of RNC and Timing Advance then, calculate the loop time delay RTT (301) of this UE to be positioned, RNC measures the angle of arrival AOA (302) of UE to be positioned by the special measurement message control Node B of Iub interface simultaneously; Behind the measured value that obtains RTT, RNC can determine the transfer (303) of localization method according to the threshold value of RTT measured value and certain setting, and more than the setting of default thresholding should be in conjunction with concrete sub-district geographical environment and system configuration choose reasonable; In 303, when RTT measured value during less than predefined thresholding, illustrate that UE to be positioned is nearer apart from center of housing estate, the OTDOA algorithm of basic OTDOA algorithm and employing interference delete technology can not be worked near center of housing estate probably, and can reasonable work near center of housing estate based on the localization method of the angle of arrival (AOA), so implement the location at the localization method that this region R NC can preferentially select RTT to add AOA, algorithm flow turns to 304, RNC at first sets location Calculation sign X, treats consumer positioning according to the measured value of RTT and AOA then and carries out position calculation (304); Whether RNC checking positioning accuracy satisfies the required precision (305) in the Location Request; In 305, RNC judges when the positioning accuracy for the treatment of positioning UE satisfies required precision that RNC report positioning result is to core net, and flow process finishes (316); In 305, RNC judges when the positioning accuracy for the treatment of positioning UE can not satisfy required precision, turns to 307, continues to measure more data; In 303, if the RTT measured value, illustrates that UE to be positioned is far away apart from center of housing estate greater than threshold value, the easier signal that detects more adjacent cell of UE to be positioned, the preferential localization method of selecting based on OTDOA of RNC, RNC at first removes location Calculation sign X (306); Then RNC starts the propagation loss (307) that UE to be positioned measures each adjacent cell; RNC based on certain thresholding and criterion, judges that those adjacent cells can be used for measurement and the localization method of OTDOA according to the propagation loss of each adjacent cell to UE to be positioned then, removes the adjacent cell (308) that does not meet the demands simultaneously; In 308, when detecting, can measure and the adjacent cell number of localization method during RNC in OTDOA less than 3, and the RNC control flow forwards 309 to, and RNC is further according to the number selection localization method (309) of available cell; In 309, when detecting, can measure and the adjacent cell of localization method have only (Serving cell) time RNC in OTDOA, and RNC judges whether set (310) of location Calculation sign X; In 310, the location estimation that location Calculation sign X set explanation has been calculated UE to be positioned according to the loop time delay (RTT) and the angle of arrival (AOA) of UE to be positioned, corresponding to the situation of RTT measured value less than thresholding, RNC report positioning result is to core net, and flow process finishes (316); In 310, location Calculation sign X does not have set corresponding to the situation of RTT measured value greater than thresholding, and RNC treats positioning UE according to the measured value of RTT and AOA and carries out position calculation (311); RNC report positioning result is to core net then, and flow process finishes (316); In 309, when detecting, can measure and the adjacent cell of localization method be two (Serving cell and an adjacent cell) time RNC in OTDOA, RNC measures control messages request UE to be positioned by Uu interface RRC signaling and carries out the OTDOA measurement, comprises in its neighbor cell list and can be used for that adjacent cell (312) that OTDOA measures; RNC treats positioning UE according to the OTDOA measured value of RTT, AOA and available adjacent cell and carries out position calculation (313) then; RNC report positioning result is to core net then, and flow process finishes (316); In 308, when detecting, can measure and the adjacent cell number of localization method during RNC in OTDOA more than or equal to 3, the RNC control flow forwards 314 to, RNC measures control messages request UE to be positioned by Uu interface RRC signaling and carries out the OTDOA measurement, comprises in its neighbor cell list and can be used for those adjacent cells (314) that OTDOA measures; UE measurement OTDOA to be positioned and reporting measurements are to RNC, RNC treats positioning UE according to the OTDOA measurement result and carries out position calculation, according to from the requirement for precision of the Location Request of core net, whether RNC can select to use the loop time delay (RTT) and the angle of arrival (AOA) to strengthen the positioning accuracy (315) of OTDOA localization method; RNC report positioning result is to core net then, and flow process finishes (316).
Fig. 4 is another implementing procedure figure based on propagation loss decision localization method of the present invention, and RNC receives the Location Request to certain subscriber equipment (UE) from core net, and RNC begins the flow process (400) of localization method decision; RNC at first starts the propagation loss (401) that UE measures each adjacent cell; RNC based on certain thresholding and criterion, judges that those adjacent cells can be used for measurement and the localization method of OTDOA according to the propagation loss of each adjacent cell to UE to be positioned then, removes the adjacent cell (402) that does not meet the demands simultaneously; In 402, when detecting, can measure and the adjacent cell number of localization method during RNC in OTDOA less than 3, and the RNC control flow forwards 403 to, then further according to the number selection localization method (403) of available cell; In 403, when detecting, can measure and the adjacent cell of localization method have only (Serving cell) time RNC in OTDOA, RNC starts the loop time delay (RTT) and the angle of arrival (AOA) of measuring UE to be positioned, in order to realize measure R TT, RNC can measure the time deviation of UE to be positioned respectively by Iub interface special measurement message request Node B, UE to be positioned measures its time lead by Uu interface RRC signaling request, the time deviation of the comprehensive UE to be positioned of RNC and Timing Advance then, calculate the loop time delay RTT (404) of this UE, RNC measures the angle of arrival AOA (405) of UE to be positioned by the special measurement message control Node B of Iub interface simultaneously; RNC treats positioning UE according to the measured value of RTT and AOA and carries out position calculation (406) then; RNC report positioning result is to core net then, and flow process finishes (413); In 403, when detecting, can measure and the adjacent cell of localization method be two (Serving cell and an adjacent cell) time RNC in OTDOA, RNC starts the loop time delay (RTT) and the angle of arrival (AOA) of measuring UE to be positioned, start OTDOA measuring operation simultaneously to available cell, in order to realize measure R TT, RNC can measure the time deviation of UE to be positioned respectively by Iub interface special measurement message request Node B, by Uu interface RRC signaling request UE Measuring Time to be positioned lead, the Timing Advance of the time deviation of the comprehensive UE of RNC and UE then, calculate the loop time delay RTT (407) of this UE, RNC measures the angle of arrival AOA (408) of UE to be positioned by the special measurement message control Node B of Iub interface simultaneously, RNC measures control messages request UE by Uu interface RRC signaling and carries out the OTDOA measurement simultaneously, comprises in its neighbor cell list and can be used for that adjacent cell (409) that OTDOA measures; RNC treats positioning UE according to the OTDOA measured value of RTT, AOA and available adjacent cell and carries out position calculation (410) then; RNC report positioning result is to core net then, and flow process finishes (413); In 402, when detecting, can measure and the adjacent cell number of localization method during RNC in OTDOA more than or equal to 3, the RNC control flow forwards 411 to, RNC measures control messages request UE to be positioned by Uu interface RRC signaling and carries out the OTDOA measurement, comprises in its neighbor cell list and can be used for those adjacent cells (411) that OTDOA measures; UE measurement OTDOA and reporting measurements are to RNC, RNC treats positioning UE according to the OTDOA measurement result and carries out position calculation, according to the requirement of Location Request for precision, RNC can select whether to start the loop time delay (RTT) and the angle of arrival (AOA) of measuring UE to be positioned, is used to strengthen the positioning accuracy (412) of OTDOA localization method; RNC report positioning result is to core net then, and flow process finishes (413).
According to method of the present invention, the multiple possible localization method of RNC integrated treatment, thereby for being in the suitable localization method of subscriber equipment to be positioned (UE) decision of any position in the sub-district, avoided single localization method can not be applied to the problem of All Ranges in the cell coverage area, guaranteed that the UE to be positioned of any position implements the location in the sub-district to being in the localization method that satisfies required precision or best localization method.
According to method of the present invention, RNC is according to the information of known adjacent cell about UE to be positioned or ask the parameter of UE measure neighbor cells to be positioned, can determine to select subscriber equipment to be positioned (UE) to send effectively and need sub-district that UE to be positioned measures so that by broadcast or measure control messages and send to subscriber equipment to be positioned (UE) and need the cell list of UE measurement to be positioned to avoid comprising in the cell list some sub-districts that can not satisfy the OTDOA measurement requirement and consume system resources.
According to method of the present invention, RNC in the LCR-TDD system is when measuring loop time delay (RTT), Node B treats the measurement of time deviation of positioning UE and UE to be positioned measurement to its time lead synchronously, and then comprehensive by to time deviation and Timing Advance, obtain more effectively RTT measured value.In order to realize treating the time deviation of positioning UE and the synchro measure of Timing Advance, RNC sends in the special measurement message of Node B and comprises information unit CFN, and it is used to set Node B and measures the time deviation of UE to be positioned in the radio frames of appointment; The RRC signaling that RNC sends to UE to be positioned is measured in the internal measurement message elements of control messages event-triggered reporting is set, the incident of the Timing Advance of the radio frames of i.e. report appointment SFN, and comprise the information unit about SFN, just RNC controls the Timing Advance that UE to be positioned measures specific radio frames.Like this, Node B and UE to be positioned measure the radio frames of appointment respectively.Comprise information unit CFN in the response message of Node B to RNC special measurement message, UE to be positioned measures in the response message of control messages and the measurement report message RNC and comprises information unit SFN, and they are used to confirm that the measurement of reporting is the measured value to that radio frames.
Claims (8)
1. a sharp radio network controller (RNC) is determined the localization method of user equipment (UE) to be positioned, comprises step:
A) RNC starts the loop time delay of measuring UE to be positioned;
B) Node B measures the angle of arrival of UE;
C) RNC sets threshold value;
D) when the measured value of the loop time delay of UE to be positioned during less than predefined thresholding, RNC is according to the value locating user devices of the loop time delay and the angle of arrival.
2. by the described method of claim 1, it is characterized in that also comprising step: when the loop time delay measured value of UE to be positioned during greater than predefined threshold value,
RNC starts the propagation loss that UE measures each neighbor cell;
Arrive sub-district number that time difference OTDOA measures more than or equal to 3 the time when RNC judges to can be used for observing, RNC starts UE and measures observation and arrive time difference OTDOA, is used for locating user devices.
3. by the described method of claim 1, it is characterized in that also comprising step: when the loop time delay measured value of UE to be positioned during greater than predefined threshold value,
RNC starts the propagation loss that UE measures each neighbor cell;
When the RNC judgement can be used for observing the sub-district number that arrives time difference OTDOA measurement to equal 2, RNC startup UE measured to observe and arrives time difference OTDOA, and RNC is according to loop time delay, the angle of arrival and available observation arrival time difference OTDOA compute location result.
4. by the described method of claim 1, it is characterized in that also comprising step: when the loop time delay measured value of UE to be positioned during greater than predefined threshold value,
RNC starts the propagation loss that UE measures each neighbor cell;
When the RNC judgement can be used for observing the sub-district number that arrives time difference OTDOA measurement to equal 1, RNC was according to loop time delay and angle of arrival compute location result.
5. by the described method of claim 1, it is characterized in that described measurement loop delay packet draws together:
RNC measures the time deviation that message request Node B measures UE to be positioned by the IuB interface respectively;
RNC is by Uu interface RRC signaling request UE Measuring Time to be positioned lead.
6. by the described method of claim 5, it is characterized in that:
RNC sends in the special measurement message of Node B and comprises Connection Frame Number CFN, and it is used to set Node B and measures the time deviation of UE to be positioned in the radio frames of appointment;
The RRC signaling that RNC sends to UE to be positioned is measured in the internal measurement message elements of control messages Event triggered is set.
7. by the described method of claim 6, it is characterized in that: described Event triggered comprises the information unit of system frame number SFN.
8. by claim 2 or 3 described methods, it is characterized in that described RNC comprises neighbor cell list by the RRC signaling measurement control messages that the Uu interface sends.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101316439B (en) * | 2007-05-31 | 2012-06-27 | 株式会社Ntt都科摩 | Server device, mobile terminal and location mode selection method |
| WO2009054763A1 (en) * | 2007-10-25 | 2009-04-30 | Telefonaktiebolaget Lm Ericsson (Publ) | A method of allocating radio resources |
| CN101656909B (en) * | 2008-08-21 | 2012-12-26 | 中国移动通信集团公司 | Method for positioning mobile terminal and base station |
| US9002354B2 (en) * | 2009-06-12 | 2015-04-07 | Google Technology Holdings, LLC | Interference control, SINR optimization and signaling enhancements to improve the performance of OTDOA measurements |
| CN102045840B (en) * | 2009-10-26 | 2014-06-04 | 中国移动通信集团广东有限公司 | Mobile positioning method and radio network controller |
| MX2013001732A (en) * | 2010-08-16 | 2013-03-22 | Ericsson Telefon Ab L M | Positioning node, user equipment and methods therein. |
| CN103096459B (en) * | 2011-10-27 | 2015-06-17 | 华为技术有限公司 | Method of locating user equipment and locating server |
| CN102711052B (en) * | 2012-05-25 | 2015-07-22 | 中兴通讯股份有限公司 | Distance paging method of trunking communication system, trunking communication system and base station |
| US10274581B2 (en) | 2012-06-14 | 2019-04-30 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for position determination |
| US20180310127A1 (en) * | 2017-04-25 | 2018-10-25 | Futurewei Technologies, Inc | System and Method for Collaborative Position Determination |
| CN110012416B (en) * | 2017-12-29 | 2021-03-02 | 中国移动通信集团浙江有限公司 | User terminal positioning method and device |
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| US6047192A (en) * | 1996-05-13 | 2000-04-04 | Ksi Inc. | Robust, efficient, localization system |
| CN1291062A (en) * | 1999-10-05 | 2001-04-11 | 朗迅科技公司 | Using single base station search positioning in CDMA/TDMA system |
| CN1383282A (en) * | 2001-04-20 | 2002-12-04 | Lg电子株式会社 | Device and method for judging position of mobile communication terminal |
| CN1434663A (en) * | 2003-02-24 | 2003-08-06 | 重庆赛洛克无线定位有限公司 | Base station selection method for network based radio location system |
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| US6047192A (en) * | 1996-05-13 | 2000-04-04 | Ksi Inc. | Robust, efficient, localization system |
| CN1291062A (en) * | 1999-10-05 | 2001-04-11 | 朗迅科技公司 | Using single base station search positioning in CDMA/TDMA system |
| CN1383282A (en) * | 2001-04-20 | 2002-12-04 | Lg电子株式会社 | Device and method for judging position of mobile communication terminal |
| CN1434663A (en) * | 2003-02-24 | 2003-08-06 | 重庆赛洛克无线定位有限公司 | Base station selection method for network based radio location system |
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