CN1719934A - In the LCR-TDD system, utilize beam shaping to implement the method that the location strengthens - Google Patents
In the LCR-TDD system, utilize beam shaping to implement the method that the location strengthens Download PDFInfo
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Abstract
Utilize beam shaping to implement the method that the location strengthens in the LCR-TDD system, SRNC sends the CELL_PCH state that message control UE enters connection mode; SRNC sends public-measurement initialization request message to Node B; Node B is loopback public-measurement initialization answer message subsequently, begins simultaneously the AOA of RACH channel is measured; RNC controls UE to Active Set sub-district and neighbor cell execution OTDOA measurement by sending the measurement control messages; According to the requirement of the measurement control messages of being received, the measurement result of returning OTDOA in measurement report message is to SRNC; RNC receives RACH channel data frame or the RACH/CPCH[FDD that the Iub/Iur interface user plane is sent] channel data frame, from message, extract the sign of UE, if this ID points to the UE that is locating, extract RACH_AOA measurement result and RACH_AOA precision estimation domain.The present invention implements the measurement of AOA by beam shaping, finishes positioning function in conjunction with OTDOA/Cell-ID, reaches not take dedicated radio resources and minimizing is used for the necessary extra signaling consumption of UE transition status.
Description
Technical field
The present invention relates to 3-G (Generation Three mobile communication system), more specifically in low spreading rate time-division duplex (LCR-TDD CDMA) system of 1.28Mcps, utilizing beam shaping to implement to locate the method for enhancing.
Background technology
The LCR-TDD system is a kind of low spreading rate time-division duplex (LCR-TDDCDMA) system, and 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 by array antenna beam shaping (Beamforming) back, 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.
Fig. 1 is the structure chart of the defined enforcement positioning service of 3GPP standardization body, comprising RNC102 and 103, the Location Measurement Unit (LMU) that is associated with Node B104 and 105, location-independent measuring unit 107 (Stand-alone LMU), stand-alone service mobile positioning center 108 (SAS), subscriber equipment 106 (UE) and core net 101 (CN), pass through interface 111,113,112,110,109 (Iu between each entity, Iub, Iur, Iupc, Uu) communication.SRNC 102 is by Iu111 interface and CN exchange positioning service signaling, and SRNC is responsible for controlling UTRAN resource (Node B, LMU, SAS), subscriber equipment (UE) and computing function, thus the position of estimation UE, and positioning result returned CN.
In the technical specification of current 3GPP, cell ID (Cell-ID), observation arrival time difference (OTDOA) and three kinds of location technologies of agps system (A-GPS) have been defined.In addition, these three kinds of technology both can not make the complexity of system that tangible increase is arranged again in conjunction with other available measurements so that increase locating accuracy.
Therefore, the invention is intended to propose to increase in the OTDOA/Cell-ID location survey angle of arrival (AOA) in the LCR-TDD code division multiple access system measures so that improve locating accuracy.
In the agreement that is described in existing 3GPP as shown in Figure 2 briefly, the OTDOA that measures at cell private channel (CELL_DCH) the combinations of states AOA of Radio Resource control (RRC) connection mode implements the signaling process of location.The pattern that need to prove UE is divided into free time (IDLE) pattern and RRC connection mode, and wherein the RRC connection mode comprises CELL_DCH, CELL_FACH, four kinds of states of CELL_PCH and URA_PCH.It should be noted that the CELL_DCH state that must work in the RRC connection mode at existing 3GPP normalized definition UE.The present invention has only shown in the figure and the signaling of UE positioning action relevant portion in order clearly to describe the content of institute's standard in the existing standard, has mainly comprised the steps:
At first, core network (CN) sends reports SRNC to the positioning control of UE, and SRNC subsequent analysis Location Request and according to the ability of UE is selected suitable localization method (step 201); Subsequently, SRNC request UE carries out the OTDOA measurement to Active Set sub-district and neighbor cell, and wherein OTDOA measures and finish (step 202) under the CELL_DCH of RRC connection mode state; UE can return the measurement result of OTDOA to SRNC (step 203); If SRNC can not obtain enough OTDOA metrical informations, perhaps thinking extra measurement for improving under the situation that precision has superiority, SRNC also can ask Node B to measure the AOA (step 204) of Serving cell; If SRNC request Node B carries out AOA and measures (only to the LCR-TDD system), Node B report AOA value is to SRNC (step 205) so; SRNC can be in conjunction with OTDOA and AOA information and executing position calculation.In addition, the geography information coordinate system that also may be adopted according to client's application demand conversion.Location estimation comprises positional information, and positional precision is estimated, Measuring Time etc.If core net comprises entity SAS, SAS can carry out the location Calculation function and the result is mail to SRNC (step 206); At last, SRNC report location estimation also can be reported method of measurement or localization method tabulation (step 207) that location estimation is used according to demand to core net.
In existing 3GPP agreement, have following characteristics about the measurement mechanism of AOA:
1) AOA measure can only be under the CELL_DCH of RRC connection mode state by to the measuring of dedicated channel, that is to say that in order to finish the measurement of AOA, UE must be in the CELL_DCH state;
2) suppose that core net initiates the Location Request to the UE that is in free time (IDLE) state, this UE must at first set up RRC and connect and enter the CELL_DCH state, this means that being necessary for UE distributes special-purpose Radio Resource, such as spreading code etc.;
3) suppose that the core net initiation is to being in CELL_FACH, CELL_PCH and URA_PCH state are to the Location Request of UE, and this UE must at first carry out necessary signaling and transfer to the CELL_DCH state, this means that being necessary for UE distributes special-purpose Radio Resource, such as spreading code etc.;
The above analysis, for the UE that is in beyond the RRC connection mode CELL_DCH state, there is following defective in current LCR-TDD system to the measurement mechanism of AOA:
1) just to finishing positioning action, such as measuring AOA, need be for the user distribute special-purpose Radio Resource and makes UE be transferred to the CELL_DCH state, this is unfavorable for effectively utilizing the channel code resource of LCR-TDD system preciousness, because the channel code resource of LCR-TDD system is limited;
2) if UE is in free time (IDLE) state and RRC connection mode CELL_FACH, CELL_PCH and URA_PCH state need the necessary control signaling to make UE be transformed into the CELL_DCH state so that the measurement of being correlated with, such as measuring AOA, this obviously is a kind of consumption to resource.
Summary of the invention
The purpose of this invention is to provide a kind of the configuration beam shaping the LCR-TDD system in the OTDOA/Cell-ID location technology is improved the method for location in conjunction with the AOA measurement, this method can be finished the surveying work of location under lower resource consumption, reach the optimization system resource management.
For achieving the above object, a kind of beam shaping that utilizes in the LCR-TDD system is implemented the method that the location strengthens, and comprises step:
(a) SRNC sends the CELL_PCH state that message control UE enters connection mode;
(b) SRNC sends public-measurement initialization request message to Node B;
(c) Node B loopback public-measurement initialization answer message subsequently begins the AOA of RACH channel is measured simultaneously;
(d) RNC controls UE to Active Set sub-district and neighbor cell execution OTDOA measurement by sending the measurement control messages;
(e) according to the requirement of the measurement control messages of being received, the measurement result of returning OTDOA in measurement report message is to SRNC;
(f) RNC receives RACH channel data frame or the RACH/CPCH[FDD that the Iub/Iur interface user plane is sent] channel data frame, from message, extract the sign of UE, if this ID points to the UE that is locating, extract RACH_AOA measurement result and RACH_AOA precision estimation domain.
The present invention proposes the measurement of under RRC connection mode CELL_FACH state, implementing AOA by beam shaping, and finish positioning function in conjunction with OTDOA/Cell-ID, reach by this and do not take dedicated radio resources and minimizing is used for the necessary extra signaling consumption of UE transition status.
Description of drawings
Fig. 1 is a structure chart of implementing positioning service among the 3GPP;
Fig. 2 is the OTDOA location signaling flow process of measuring in conjunction with AOA in the existing standard;
Fig. 3 is that the OTDOA that measures in conjunction with AOA that the present invention proposes locatees improvement signaling process (IDLE);
Fig. 4 is that the OTDOA that measures in conjunction with AOA that the present invention proposes locatees improvement signaling process (CELL_PCH/URA_PCH);
Fig. 5 is the structure of Iub user plane common signal channel RACH Frame;
Fig. 6 is Iur user plane common signal channel RACH/CPCH[FDD] structure of Frame.
Embodiment
The present invention is directed to the OTDOA/Cell ID that measures in conjunction with AOA in the existing 3GPP standard and implement to exist in the targeting scheme defective that consumes private resource, proposed following a kind of beam shaping measurement AOA that utilizes and implement to locate the method for enhancing in low spreading rate time-division duplex (LCR-TDD CDMA) system of 1.28Mcps, the key technology point of its invention is as follows:
(1) under the CELL_FACH of RRC connection mode state rather than CELL_DCH state, finishes relevant location survey operation;
(2) need public-measurement initialization request (CommonMeasurement Initiation Request) message and the public-measurement initialization of Iub interface agreement between RNC and Node B respectively and the interface protocol Iur between the RNC to reply to measure (Common Measurement Initiation Response) message in that one of increase inserts the measurement that the angle of arrival (RACH_AOA) field is controlled the Node B enforcement Random Access Channel angle of arrival at random in the type information unit (IE);
(3) Node B measures AOA by the uplink random access channel (RACH) that is sent by UE is implemented beam shaping;
(4) by the data field of Iub/Iur interface user plane Frame is expanded, so that the measured AOA measurement result of Node B is sent to RNC.
Fig. 5 has provided Iub user plane RACH channel data frame structure.For the report of the AOA measurement result of supporting RACH of the present invention, the RACH Frame is expanded, concrete increase by two territories: AOA measurement result 501 and AOA precision 502.Simultaneously, whether certain bit by new information element sign (New IE flags) territory comes to indicate above-mentioned AOA measurement result and two territories of AOA precision available to RNC.
Fig. 6 has provided Iur user plane RACH/CPCH[FDD] the channel data frame structure.In order to support the report of AOA measurement result, need be to RACH/CPCH[FDD] Frame expands, concrete increase by two territories: AOA measurement result 601 and AOA precision 602.Simultaneously, whether certain bit by new information element sign (New IE flags) territory comes to indicate above-mentioned AOA measurement result and two territories of AOA precision available to RNC.
The RACH channel data frame that SRNC reception Iub/Iur interface user plane according to the present invention is sent (perhaps RACH/CPCH[FDD] channel data frame), from message, extract the sign of UE, if this ID points to the UE that is locating, extract corresponding AOA measurement result and AOA precision estimation domain so that in conjunction with methods such as OTDOA or Cell ID, executing location is calculated, and the result of location estimation is sent to core network (CN).
Below in conjunction with several examples the present invention is described.
Describe first embodiment of the present invention referring to Fig. 3, promptly core network (CN) initiates to implement for the UE that is in the IDLE state signaling process of location:
At first, when UE is in idle condition, core network (CN) sends beep-page message (Paging) to SRNC (step 301); After SRNC receives beep-page message (Paging), send paging Class1 (Paging Type 1) message according to the service area that UE registered and come paging UE (step 302); After UE has received Paging Type 1 message, implement UE and be connected by sending RRC connection request (RRC ConnectionRequest) message, so that transfer to RRC connection status (step 303) from idle condition with RRC between the SRNC; Then, SRNC loopback RRC connects the RRC connection request that foundation (RRCConnection Setup) message is confirmed UE, and after UE has received that RRC connects foundation, UE enters the CELL_FACH state of RRC connection mode, under this state of UE, do not distribute private resource, have only signaling to connect (step 304) with RRC; UE finishes (RRC Connection Setup Complete) message by loopback RRC connection foundation and confirms the signaling connection of RRC and report the ability information that this UE possesses to SRNC to SRNC, comprising (steps 305) such as abilities of relevant location; Then, UE sends initial (the Initial Direct Transfer) message that directly transmits and responds paging (306) to SRNC; After SRNC has received initial directly transmission message, by sending the paging (307) that initial UE message (Initial UE Message) responds CN; CN sends positioning reporting control (Location ReportingControl) message is asked UE to SRNC positional information subsequently.SRNC is in positioning reporting control (Location Reporting Control) message of having received that CN sends, in conjunction with UE ability and locating accuracy requirement, select suitable localization method, for example SRNC selects the OTDOA location estimation method (step 308) in conjunction with the AOA measurement; Because SRNC selects the OTDOA location estimation method in conjunction with the AOA measurement, so SRNC sends public-measurement initialization request (Common Measurement Initiation Request) message to Node B, comprise in public-measurement initialization request (Common Measurement Initiation Request) message measurement type information unit (IE) that wherein inserting the angle of arrival (RACH_AOA) field at random disposes the AOA measurement (step 309) of NodeB startup to access channel; (Common Measurement Initiation Response) message is replied in Node B loopback public-measurement initialization subsequently, begins simultaneously the AOA of RACH channel is measured; In addition, the RACH channel data frame of Node B by the Iub/Iur interface user plane (perhaps RACH/CPCH[FDD] channel data frame) given SRNC (step 310) with measurement report; Then, SRNC controls UE to Active Set sub-district and neighbor cell execution OTDOA measurement by sending measurement control (MeasurementControl) message.It should be noted that OTDOA among the present invention measures finishes (step 311) under RRC connection mode CELL_FACH state; UE is according to the requirement of measurement control (Measurement Control) message of being received, and the measurement result of returning OTDOA in measurement report (Measurement Report) message is to SRNC; This message is sent to SRNC through Node B by the Iub/Iur interface user plane on Random Access Channel, carry the AOA information (step 312) of RACH channel simultaneously; The RACH channel data frame that SRNC reception Iub/Iur interface user plane is sent (perhaps RACH/CPCH[FDD] channel data frame), from message, extract the sign of UE, if this ID points to the UE that is locating, extract RACH_AOA measurement result and RACH_AOA precision estimation domain.SRNC is based on OTDOA and carry out the position calculation of positioning UE in conjunction with AOA information.In addition, the geography information coordinate system that this calculating also can be adopted according to client's application requirements conversion, and location estimation comprises that positional information, positional precision estimate and Measuring Time.If core net comprises entity SAS, SAS also can carry out the location Calculation function and the result is mail to SRNC (step 313); The result is to core net for SRNC report location estimation, also can report method of measurement or localization method tabulation (step 314) that location estimation is used according to demand.At last, SRNC sends the RRC connection release message to UE, and notice UE discharges the resource (step 315) of RRC join dependency; Loopback RRC connected Release complete to SRNC after UE had received the RRC connection release message, got back to idle mode state (step 316) once more.
Describe first embodiment of the present invention referring to Fig. 4, promptly core network (CN) initiates to implement for the UE that is in the CELL_PCH/URA_PCH state signaling process of location:
At first, SRNC is in positioning reporting control (Location ReportingControl) message of having received that CN sends, in conjunction with UE ability of being stored and locating accuracy requirement, select suitable localization method, for example SRNC selects to measure OTDOA location estimation method (401) in conjunction with AOA; When UE was in RRC connection mode CELL_PCH state or URA_PCH state, the beep-page message that SRNC sends Paging Type 1 type came paging UE; After UE received beep-page message, UE transferred to the CELL_FACH state (step 402) of RRC connection mode; UE send subsequently cell update (CELL UPDATE) message to SRNC so that the response beep-page message, and can SRNC obtain the cell information (step 403) at UE place; Then, the SRNC loopback CELL UPDATE CONFIRM message cell update message (step 404) of having received that UE sends for confirmation; Because SRNC has selected the OTDOA location estimation method in conjunction with the AOA measurement, so SRNC sends public-measurement initialization request (Common MeasurementInitiation Request) message to Node B, comprise in public-measurement initialization request (CommonMeasurement Initiation Request) message measurement type information unit (IE) that wherein inserting the angle of arrival (RACH_AOA) field at random disposes the AOA measurement (step 405) of Node B startup to access channel; (CommonMeasurement Initiation Response) message is replied in Node B loopback public-measurement initialization subsequently, begins simultaneously the AOA of RACH channel is measured; In addition, the RACH channel data frame of Node B by the Iub/Iur interface user plane (perhaps RACH/CPCH[FDD] channel data frame) given SRNC (step 406) with measurement report; Then, SRNC controls UE to Active Set sub-district and neighbor cell execution OTDOA measurement by sending measurement control (Measurement Control) message.It should be noted that OTDOA among the present invention measures finishes (step 407) under RRC connection mode CELL_FACH state; UE is according to the requirement of measurement control (Measurement Control) message of being received, and the measurement result of returning OTDOA in measurement report (Measurement Report) message is to SRNC; This message is sent to SRNC through Node B by the Iub/Iur interface user plane on Random Access Channel, carry the AOA information (step 408) of RACH channel simultaneously; The RACH channel data frame that SRNC reception Iub/Iur interface user plane is sent (perhaps RACH/CPCH[FDD] channel data frame), from message, extract the sign of UE, if this ID points to the UE that is locating, extract RACH_AOA measurement result and RACH_AOA precision estimation domain.SRNC carries out the position calculation of positioning UE based on the OTDOA that measures in conjunction with AOA.In addition, the geography information coordinate system that this calculating also can be adopted according to client's application requirements conversion, and location estimation comprises that positional information, positional precision estimate and Measuring Time.If core net comprises entity SAS, SAS also can carry out the location Calculation function and the result is mail to SRNC (step 409); The result is to core net for SRNC report location estimation, also can report method of measurement or localization method tabulation (step 410) that location estimation is used according to demand; At last, SRNC sends the physical channel reallocation message to UE, and the RRC connection status of control UE will turn back to CELL_PCH/URA_PCH state (step 411); After UE received the physical channel reallocation message, loopback physical channel reprovision was finished message to SRNC, and UE reenters CELL_PCH/URA_PCH state (step 412) subsequently.
Claims (12)
1. plant and in the LCR-TDD system, utilize beam shaping to implement the method that the location strengthens, comprise step:
(a) SRNC sends the CELL_PCH state that message control UE enters connection mode;
(b) SRNC sends public-measurement initialization request message to Node B;
(c) Node B loopback public-measurement initialization answer message subsequently begins the AOA of RACH channel is measured simultaneously;
(d) RNC controls UE to Active Set sub-district and neighbor cell execution OTDOA measurement by sending the measurement control messages;
(e) according to the requirement of the measurement control messages of being received, the measurement result of returning OTDOA in measurement report message is to SRNC;
(f) RNC receives RACH channel data frame or the RACH/CPCH[FDD that the Iub/Iur interface user plane is sent] channel data frame, from message, extract the sign of UE, if this ID points to the UE that is locating, extract RACH_AOA measurement result and RACH_AOA precision estimation domain.
2. by the described method of claim 1, it is characterized in that when UE is in idle condition that the message that described RNC transmission control UE enters the CELL_PCH state of connection mode comprises: message is set up in the RRC connection.
3. by the described method of claim 1, it is characterized in that when UE is in RRC connection mode CELL_PCH state or URA_PCH state the message that described RNC transmission control UE enters the CELL_PCH state of connection mode comprises: the beep-page message of Paging Type 1 type.
4. by the described method of claim 1, it is characterized in that comprising in the described public-measurement initialization request message and insert the angle of arrival (RACH_AOA) field at random.
5. by the described method of claim 1, it is characterized in that described step (c) also comprises: Node B is by the RACH channel data or the RACH/CPCH/[FDD of Iub/Iur interface user plane] channel data frame gives SRNC with measurement report.
6. press claim 4 or 5 described methods,, it is characterized in that signaling is replied in the public-measurement initialization request of Iub/Iur interface protocol and public-measurement initialization increases a measurement type RACH_AOA respectively.
7. by the described method of claim 5, it is characterized in that, by the data field of Iub/Iur interface user plane Frame is expanded, so that the measured AOA measurement result of Node B is sent to RNC.
8. by the described method of claim 5, it is characterized in that Node B is to the measurement result of RACH channel AOA, by Iub user plane common signal channel RACH Frame and Iur user plane common signal channel RACH/CPCH[FDD] Frame report SRNC.
9. by the described method of claim 7, it is characterized in that, Iub user plane common signal channel RACH Frame is expanded corresponding territory, increased by two territories of AOA measurement result and AOA precision, and certain bit by the new information element mark domain indicates above-mentioned AOA measurement result and two territories of AOA precision whether available to RNC.
10. by the described method of claim 9, it is characterized in that described AOA measurement result territory is that 10 bits and AOA precision are 3 bits.
11. by the described method of claim 1, it is characterized in that, Iur user plane common signal channel RACH/CPCH[FDD] Frame expands corresponding territory, increased by two territories of AOA measurement result and AOA precision, and certain bit by the new information element sign indicates above-mentioned AOA measurement result and two territories of AOA precision whether available to RNC.
12., it is characterized in that AOA measurement result territory is that 10 bits and AOA precision are 3 bits by the described method of claim 11.
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| WO2008009231A1 (en) * | 2006-07-12 | 2008-01-24 | Datang Mobile Communications Equipment Co., Ltd | A method and device for beam-forming fach |
| WO2008049274A1 (en) * | 2006-10-25 | 2008-05-02 | Huawei Technologies Co., Ltd. | A time difference of arrival based locating method and system |
| WO2009100562A1 (en) * | 2008-01-29 | 2009-08-20 | Lucent Technologies Inc. | Method and apparatus of mobile device location |
| CN101110622B (en) * | 2006-07-21 | 2010-09-08 | 普天信息技术研究院 | Beam shaping method for access to signal channel |
| CN101453748B (en) * | 2007-11-30 | 2011-05-25 | 中兴通讯股份有限公司 | Iub port special measurement method, apparatus and system for HSDPA service |
| CN101370162B (en) * | 2007-08-15 | 2012-12-19 | 华为技术有限公司 | Load information acquirement method, apparatus and system |
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| WO2008009231A1 (en) * | 2006-07-12 | 2008-01-24 | Datang Mobile Communications Equipment Co., Ltd | A method and device for beam-forming fach |
| CN101106409B (en) * | 2006-07-12 | 2010-09-29 | 大唐移动通信设备有限公司 | Method for shaping forward access channel FACH |
| CN101110622B (en) * | 2006-07-21 | 2010-09-08 | 普天信息技术研究院 | Beam shaping method for access to signal channel |
| WO2008049274A1 (en) * | 2006-10-25 | 2008-05-02 | Huawei Technologies Co., Ltd. | A time difference of arrival based locating method and system |
| CN102256223B (en) * | 2007-06-25 | 2013-07-03 | 中兴通讯股份有限公司 | Method for continuously tracking designated user in NodeB |
| CN101370162B (en) * | 2007-08-15 | 2012-12-19 | 华为技术有限公司 | Load information acquirement method, apparatus and system |
| CN101453748B (en) * | 2007-11-30 | 2011-05-25 | 中兴通讯股份有限公司 | Iub port special measurement method, apparatus and system for HSDPA service |
| CN101933304A (en) * | 2008-01-29 | 2010-12-29 | 朗讯科技公司 | Method and apparatus of mobile device location |
| WO2009100562A1 (en) * | 2008-01-29 | 2009-08-20 | Lucent Technologies Inc. | Method and apparatus of mobile device location |
| US8588087B2 (en) | 2008-01-29 | 2013-11-19 | Alcatel Lucent | Method for positioning mobile devices and apparatus for positioning mobile devices |
| CN104380140A (en) * | 2012-06-14 | 2015-02-25 | 爱立信(中国)通信有限公司 | Method and apparatus for position determination |
| US10274581B2 (en) | 2012-06-14 | 2019-04-30 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for position determination |
| WO2019205075A1 (en) * | 2018-04-27 | 2019-10-31 | 华为技术有限公司 | Beam positioning method, device and system |
| WO2021031103A1 (en) * | 2019-08-20 | 2021-02-25 | Qualcomm Incorporated | Paging for mobile-terminated small data reception in idle and/or inactive mode |
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