WO2010127633A1 - 一种确定用户终端的位置信息的方法、系统和装置 - Google Patents

一种确定用户终端的位置信息的方法、系统和装置 Download PDF

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Publication number
WO2010127633A1
WO2010127633A1 PCT/CN2010/072511 CN2010072511W WO2010127633A1 WO 2010127633 A1 WO2010127633 A1 WO 2010127633A1 CN 2010072511 W CN2010072511 W CN 2010072511W WO 2010127633 A1 WO2010127633 A1 WO 2010127633A1
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Prior art keywords
user terminal
random access
measurement value
contention random
access preamble
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PCT/CN2010/072511
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English (en)
French (fr)
Inventor
房家奕
全海洋
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Datang Mobile Communications Equipment Co Ltd
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Datang Mobile Communications Equipment Co Ltd
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Priority to US13/319,225 priority Critical patent/US20120134288A1/en
Priority to KR1020117026759A priority patent/KR101284063B1/ko
Priority to JP2012508890A priority patent/JP5319011B2/ja
Publication of WO2010127633A1 publication Critical patent/WO2010127633A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W64/00Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/0205Details
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/12Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves by co-ordinating position lines of different shape, e.g. hyperbolic, circular, elliptical or radial

Definitions

  • the present invention relates to wireless communication technologies, and in particular, to a method, system and apparatus for determining location information of a user terminal. Background technique
  • the positioning function can provide users with various services such as work, entertainment, life and so on.
  • Typical location services include assistance services such as emergency medical services, emergency location, etc., as well as location-based information services such as finding the latest dining and entertainment information, yellow pages, etc., as well as advertising services such as promotional discounts; Location-based billing tracking class services, etc.
  • UE location technology is mainly divided into three types: The first is network-based services, without the help of mobile stations; the second is network-based services and mobile station technologies; the third is GPS (Global) Positioning Systems, Global Positioning System) technology.
  • the positioning service has two methods based on the user level and the control level in the time limit: Based on the control plane, the location-related data is on the standard signaling link, and the user terminal and the SMLC (Serving Mobile Location Centre, service) Move location center) interaction. Control plane-based services are mainly applied to emergency services.
  • UMTS Universal Mobile Telecommunications System
  • a variety of positioning technologies are used, one of which is a network-based service and a mobile station technology.
  • the RNC Radio Network Controller
  • the user terminal will measure the result and the time at which the result is measured (ie, system frame number SFN) Reported to the network.
  • the embodiment of the invention provides a method, a system and a device for determining location information of a user terminal, which are used to solve the problem that the location information of the user terminal cannot be determined in the LTE system.
  • a method for determining location information of a user terminal includes: determining, by a network side, a timing advance TA measurement according to an actual arrival time and an expected arrival time of a non-contention random access preamble sequence from a user terminal Value
  • the network side determines location information of the user terminal according to the TA measurement value.
  • a system for determining location information of a user terminal includes: a radio access network device, configured to: according to an actual arrival time and an expected arrival time of a non-contention random access preamble sequence from a user terminal, Determining the timing advance TA measurement;
  • a positioning device configured to determine location information of the user terminal according to the TA measurement value.
  • a radio access network device where the radio access network device includes: a receiving module, configured to receive a non-contention random access preamble sequence from a user terminal; and a first determining module, configured to The actual arrival time and the expected arrival time of the non-contention random access preamble sequence of the user terminal determine the timing advance TA measurement value.
  • the network side determines the timing advance TA measurement value according to the actual arrival time and the expected arrival time of the non-contention random access preamble sequence from the user terminal; the network side determines the user terminal according to the TA measurement value.
  • Location information Since the TA measurement value can be determined by the non-contention random access in the LTE system, the location information of the user terminal can be determined in the LTE system, and then the user terminal is located, and the solution of the embodiment of the present invention is simple and easy to implement.
  • users can provide various services through the positioning function in the LTE system.
  • FIG. 1 is a schematic diagram of timing relationship of an LTE TDD (Time Division Duplex) system according to an embodiment of the present invention
  • FIG. 2A is a schematic diagram 1 of positioning a user terminal according to an embodiment of the present invention.
  • FIG. 2B is a schematic diagram 2 of positioning a user terminal according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a system for determining location information of a user terminal according to an embodiment of the present invention
  • FIG. 4 is a schematic structural diagram of a radio access network device according to an embodiment of the present invention
  • FIG. 5 is a schematic flowchart of a method for determining location information of a user terminal according to an embodiment of the present invention. detailed description
  • the network side determines the timing advance TA measurement value according to the actual arrival time and the expected arrival time of the non-contention random access preamble sequence from the user terminal; the network side determines the location information of the user terminal according to the TA measurement value. Since the TA measurement value can be determined by the non-contention random access in the LTE system, the location information of the user terminal can be determined in the LTE system, and the user terminal can be located.
  • T represents the length of each subframe
  • L0 represents the advancement amount of the uplink subframe in which the preamble (random access preamble sequence) is located (depending on the frame structure).
  • L_p represents the length of the preamble (depending on factors such as preamble format).
  • delta_tl The delay of delta_tl is already present when the downlink subframe arrives.
  • the upstream preamble reaches the wireless access network device side, it will delay delta-t2 again.
  • the actual arrival time of the preamble on the network side (the actual time at which the reception of the preamble sequence signal is completed)
  • t2 tl + delta - tl + delta - t2.
  • the difference between the two is delta—tl+delta J2.
  • the latest downlink timing may be used before the preamble code is sent, or the downlink synchronization process may be directly performed to obtain the latest downlink timing, thus ensuring the downlink propagation delay and the uplink propagation delay. the same.
  • the base station can obtain the TA (Timing Advance) measurement value by receiving the preamble, and then can estimate the relative distance between the user terminal and the base station, and can implement the CELL ID+TA positioning method by combining the known geographic location information of the base station. .
  • TA Timing Advance
  • the base station can additionally obtain the Angle of Arrival (AOA) measurement value by processing the preamble signal, thereby obtaining the azimuth information of the user terminal seen from the base station side, thereby further implementing CELL ID+TA+AOA. Positioning method.
  • AOA Angle of Arrival
  • the embodiment of the present invention can be applied to an LTE system, and the LTE TDD system of FIG. 1 is only an example.
  • the embodiment of the present invention can also be applied to an LTE FDD (Frequency Division Duplex) system.
  • LTE FDD Frequency Division Duplex
  • the radio access network device in the embodiment of the present invention may be a base station or a relay node (RN) device.
  • RN relay node
  • FIG. 2A in the first embodiment of the present invention, after determining the TA measurement value, it can be determined that the user terminal is in the circle with the radius of the measured value of the TA as the center of the wireless access network device. Up; that is, the relative geographical location of the user terminal and the radio access network device is determined. Since the absolute geographic location of each radio access network device (such as geographic information such as latitude and longitude) is known, the absolute value of the radio access network device can be found according to the CELL ID of the radio access network device where the user terminal is currently located. Geographical location, combined with the relative position of the user terminal and the wireless access network device just obtained, finally obtains the absolute geographical position of the user terminal, and realizes the positioning method of CELL ID+TA.
  • the absolute geographic location of each radio access network device such as geographic information such as latitude and longitude
  • the user terminal after determining the TA measurement value, it can be determined that the user terminal is in the center of the radio access network device, and the distance is The circumference of the radius of the TA measurement;
  • the user terminal After determining the AOA (Angel Of Arrival) measurement, it is known that the user terminal is on a ray starting from the radio access network device, and the angle at which the ray is rotated counterclockwise from the north direction is the AOA measurement value;
  • the combination of the above TA measurement value and the AOA measurement value can uniquely determine the location of the user terminal relative to the radio access network device in a polar coordinate system centered on the radio access network device;
  • the absolute geographic location of each radio access network device (such as geographic information such as latitude and longitude) is known, the absolute value of the radio access network device can be found according to the CELL ID of the radio access network device where the user terminal is currently located.
  • the geographical location, together with the relative position of the user terminal and the wireless access network device just obtained, can finally obtain the absolute geographical location coordinates of the user terminal.
  • the counterclockwise rotation in the north direction is only an example. Any direction can be used as a standard mode as needed, and the rotation angle can also be changed.
  • the clockwise rotation in the south direction can be used as a standard.
  • the corresponding adjustments need to be made when measuring the AOA measurement.
  • the non-contention random access is used in the embodiment of the present invention.
  • the same preamble code may be used by multiple user terminals at the same time (ie, a collision occurs), and the network side cannot preamble. It is associated with the user terminal "", and the non-contention random access can ensure that the preamble code is dedicated to a certain user terminal, so that the measurement value can be associated with the user terminal after the network side measurement.
  • the system for determining location information of a user terminal includes: a wireless access network device 10 and a positioning device 20.
  • a radio access network device 10 configured to determine a TA measurement value according to an actual arrival time and an expected arrival time of the non-contention random access preamble sequence from the user terminal;
  • the locating device 20 is configured to determine location information of the user terminal according to the TA measurement value determined by the radio access network device 10.
  • the positioning device 20 may be any device in the network (such as the base station 10), or may be His separate network side device, such as the positioning center SMLC, can also be a new device.
  • there are two positioning methods 1) determining the location information of the user terminal according to the TA measurement value; 2) determining the location information of the user terminal according to the TA measurement value and the AOA measurement value.
  • the radio access network device 10 determines the actual arrival time of the non-contention random access preamble sequence received from the user terminal, and compares the actual arrival time with the expected arrival time, and obtains the value as the TA. , and divide TA by 2, and the obtained value is taken as the TA measurement value.
  • the positioning device 20 determines the location information of the user terminal based on the TA measurement value determined by the radio access network device 10.
  • the expected arrival time is obtained according to the downlink timing, the PRACH (Physical Random Access Channel) resource location, and the preamble signal transmission location, for example, in Figure 1, the network side.
  • the set PRACH resource is located in the uplink subframe, and the start position of the uplink subframe is recorded as T, and the network side determines that the preamble transmission time is L0 after the uplink subframe header, and the preamble length is L_p, then the desired moment. That is T+L0+L_p.
  • the radio access network device 10 needs to measure the received signal angle of the non-contention random access preamble sequence from the user terminal, and determine the arrival according to the measured signal angle.
  • Angle AOA measurement
  • the positioning device 20 determines the location information of the user terminal according to the TA measurement value and the AOA measurement value determined by the radio access network device 10.
  • the radio access network device 10 only determines the TA measurement value (that is, the positioning mode using CELL ID + TA), the complexity of the radio access network device can be reduced, and the cost is saved, but the TA measurement value is determined compared to the radio access network device 10. And the AOA measurement (that is, using CELL ID + TA + AOA), the accuracy of positioning will be reduced.
  • Which positioning method is used can be selected as needed.
  • the radio access network device 10 Before receiving the non-contention random access preamble sequence from the user terminal, the radio access network device 10 needs to send the indication information for the non-contention random access to the user terminal, where the indication information includes the PRACH time-frequency resource information, and the incomplete information. Random access to the preamble sequence (ie preamble code) and so on.
  • the indication information may be one of the following information:
  • PDCCH heartbeat control channel
  • MAC Media Access Control
  • PDU Protocol Data Unit
  • RRC Radio Resource Control
  • the radio access network device 10 can receive the non-contention random access preamble sequence only once, and the positioning device 20 performs positioning, which can save network resources, but the positioning accuracy is not high. In order to improve the positioning accuracy, the radio access network device 10 can receive the non-contention random access preamble sequence multiple times, determine multiple measurement values, and perform positioning, which can improve the positioning accuracy.
  • the indication information carries the number of times the user terminal needs to send the non-contention random access preamble sequence, or the indication information carries the trigger reason information, and the trigger reason information is used.
  • the user terminal is notified to perform positioning by sending a non-contention random access preamble sequence.
  • the user terminal sends the non-contention random access preamble sequence multiple times according to the specified number of times; if the trigger reason information is carried, the number of transmissions may be preset, for example, in the protocol or by the network side. The user terminal is notified, so that when the user terminal determines that the non-contention random access preamble sequence needs to be sent for positioning, the non-contention random access preamble sequence may be sent multiple times according to the preset number of transmission times.
  • multiple PRACH time-frequency time-frequency resource information and multiple non-contention random access preamble sequences without multiple contention random access may be added to the indication information.
  • the radio access network device 10 After receiving the non-contention random access preamble sequence, the radio access network device 10 does not send a random access response message to the user terminal (so the user terminal continues to retransmit the non-contention random access preamble sequence), When the number of received non-contention random access preamble sequences is equal to the set threshold, a random access response message is sent to the user terminal, indicating that the user terminal stops transmitting the non-contention random access preamble sequence.
  • the size of the idle value can be set as needed.
  • the radio access network device 10 may receive a non-contention random access preamble sequence to determine a TA measurement value; or may, after receiving all non-contention random access preamble sequences, follow each non-contention random sequence The access preamble sequence determines the TA measurement.
  • the positioning device 20 may add the determined plurality of TA measurements to average, obtain an average TA measurement value, and determine the location information of the user terminal according to the average TA measurement value.
  • the positioning device 20 can also determine a position coordinate corresponding to each of the plurality of TA measurements, and average all of the determined position coordinates, and use the determined average coordinates as the position information of the user terminal.
  • the radio access network device 10 can receive a non-contention random access preamble sequence, and determine a ⁇ measurement value and a ⁇ measurement value; After receiving all of the non-contention random access preamble sequences, the ⁇ measurement value and the ⁇ measurement value may be determined according to each non-contention random access preamble sequence.
  • the positioning device 20 can respectively average the determined plurality of ⁇ measurement values and the plurality of ⁇ measurement values to obtain an average ⁇ measurement value and an average ⁇ measurement value, and determine the user according to the average ⁇ measurement value and the average ⁇ measurement value. Location information of the terminal.
  • the positioning device 20 can also group the determined plurality of measured values and the plurality of measured values.
  • each group has a ⁇ measurement value and a ⁇ measurement value, and the ⁇ measurement value and the ⁇ measurement value in the same group are determined by the same non-contention random access preamble sequence;
  • a position coordinate is determined according to the ⁇ measurement value and the ⁇ measurement value in each group, all the determined position coordinates are averaged, and the determined average coordinate is taken as the position information of the user terminal.
  • the specific positioning method of the positioning device 20 can be set as needed.
  • a radio access network device includes: a receiving module 100 and a A determination module 110.
  • the receiving module 100 is configured to receive a non-contention random access preamble sequence from the user terminal, where the first determining module 110 is configured to receive the actual arrival of the non-contention random access preamble sequence from the user terminal according to the receiving module 100. At the time of arrival and the expected arrival time, the TA measurement is determined.
  • the radio access network device of the embodiment of the present invention may further include: a positioning module 120.
  • the positioning module 120 is configured to determine location information of the user terminal according to the TA measurement value determined by the first determining module 110.
  • the positioning module 120 has two positioning modes, 1) determining the location information of the user terminal according to the TA measurement value; 2) determining the location information of the user terminal according to the TA measurement value and the AOA measurement value.
  • the manner in which the first determining module 110 determines the TA measurement value is the same as the manner in which the radio access network device 10 determines the TA measurement value in FIG. 3, and details are not described herein again.
  • the positioning module 120 determines the location information of the user terminal according to the TA measurement value determined by the first determining module 110.
  • the radio access network device of the embodiment of the present invention may further include: a second determining module 130.
  • the second determining module 130 is configured to measure a signal angle of the non-contention random access preamble sequence received by the receiving module 100 from the user terminal, and determine an arrival angle AOA measurement value according to the measured signal angle.
  • the positioning module 120 determines the location information of the user terminal according to the TA measurement value determined by the first determination module 110 and the AOA measurement value determined by the second determination module 120.
  • the specific positioning method can be selected as needed.
  • the radio access network device may send the indication information for the non-contention random access to the user terminal before receiving the non-contention random access preamble sequence from the user terminal, and the radio access network device in the embodiment of the present invention may also Further comprising: an indication module 140.
  • the indication module 140 is configured to send, to the user terminal, indication information for performing non-contention random access before the receiving module 100 receives the contention-free random access preamble sequence from the user terminal.
  • the indication information includes PRACH time-frequency resource information, a non-contention random access preamble sequence (ie, a preamble code), and the like.
  • the indication module 140 may carry the number of times the user terminal needs to send the non-contention random access preamble sequence in the indication information, or the indication information carries the trigger reason information, and triggers
  • the reason information is used to notify the user terminal to perform positioning by sending a non-contention random access preamble sequence.
  • the user terminal sends the non-contention random access preamble sequence multiple times according to the specified number of times; if the trigger reason information is carried, the number of transmissions may be preset, for example, as specified in the protocol or notified by the network side.
  • the user terminal such that when the user terminal determines that the non-contention random access preamble sequence needs to be sent for positioning, the non-contention random access preamble sequence may be sent multiple times according to the preset number of transmission times.
  • multiple PRACH time-frequency resource information and multiple non-contention random access preamble sequences with no contention random access may be added to the indication information.
  • the radio access network device of the embodiment of the present invention may further include: a sending module 150.
  • the sending module 150 is configured to: after the receiving module 100 receives the non-contention random access preamble sequence, check whether the number of received non-contention random access preamble sequences is equal to a preset threshold, if not, then Sending a random access response message to the user terminal; otherwise, sending a random access response message to the user terminal, instructing the user terminal to stop sending the non-contention random access preamble sequence.
  • the size of the threshold can be set as needed.
  • the first determining module 110 may determine a TA measurement value after the receiving module 100 receives a non-contention random access preamble sequence; or after the receiving module 100 receives all the non-contention random access preamble sequences, Each of the non-contention random access preamble sequences determines a TA measurement.
  • the manner in which the positioning module 120 determines the positioning information of the user terminal according to the plurality of TA measurement values and FIG. 3 The manner in which the positioning device 20 determines the positioning information of the user terminal according to the plurality of TA measurement values is the same, and details are not described herein.
  • the first determining module 110 and the second determining module 120 may receive a non-contention random access preamble sequence at the receiving module 100, and determine a TA respectively. The measured value and an AOA measurement value are also determined. After the receiving module 100 receives all the non-contention random access preamble sequences, the TA measurement value and the AOA measurement value are respectively determined according to each of the non-contention random access preamble sequences.
  • the positioning module 120 determines the positioning information of the user terminal based on the plurality of TA measurement values and the plurality of AOA measurement values, and the positioning device 20 determines the positioning information of the user terminal according to the plurality of TA measurement values and the plurality of AOA measurement values in FIG. The method is the same and will not be described again.
  • the specific method used by the positioning module 120 can be set as needed.
  • the method for determining user terminal location information includes the following steps: Step 501: The network side determines the TA according to the actual arrival time and the expected arrival time of the non-contention random access preamble sequence from the user terminal. Measurements.
  • Step 502 The network side determines location information of the user terminal according to the determined TA measurement value.
  • the network side has two positioning modes, 1) determining location information of the user terminal according to the TA measurement value; 2) determining location information of the user terminal according to the TA measurement value and the AOA measurement value.
  • step 501 the network side determines the actual arrival time of the received non-contention random access preamble sequence from the user terminal, and makes a difference between the actual arrival time and the expected arrival time, and the obtained value is used as the TA.
  • the TA is divided by 2, and the obtained value is taken as the TA measurement value.
  • the network side determines location information of the user terminal according to the determined TA measurement value.
  • the expected arrival time is obtained according to the downlink timing, the set PRACH resource location, and the preamble signal transmission location, for example, in FIG. 1, the PRACH resource set by the network side is located in the uplink subframe, and the uplink is The start position of the subframe is denoted by T, and the network side determines that the preamble transmission time is L0 after the uplink subframe header, and the preamble length is L_p, then the desired time is T+L0+L_p.
  • the network side needs to measure the received signal angle of the non-contention random access preamble sequence from the user terminal in step 501, and determine the angle of arrival according to the measured signal angle.
  • AOA measurement value AOA measurement value
  • the network side determines the location information of the user terminal according to the determined TA measurement value and the AOA measurement value.
  • the network side only determines the TA measurement value (that is, the positioning mode using CELL ID + TA) in step 501, the complexity of the radio access network device can be reduced, and the cost is saved, but the TA measurement value and the AOA measurement value are determined. CELL ID + TA + AOA), the accuracy of positioning will be reduced.
  • Which positioning method is used can be selected as needed.
  • step 501 the method further includes:
  • Step 500 The network side sends indication information for performing non-contention random access to the user terminal, where the indication information includes PRACH time-frequency resource information, a non-contention random access preamble sequence (ie, a preamble code), and the like.
  • the indication information includes PRACH time-frequency resource information, a non-contention random access preamble sequence (ie, a preamble code), and the like.
  • the indication information may be one of the following information:
  • the network side in step 501 can only receive the non-contention random access preamble sequence once, and then perform positioning, which can save network resources, but the positioning accuracy is not high.
  • the network side can receive the non-contention random access preamble sequence multiple times, determine multiple measurement values, and perform positioning, which can improve the positioning accuracy.
  • the indication information carries the number of times the user terminal needs to send the non-contention random access preamble sequence, or the indication information carries the trigger reason information, and the trigger reason information is used.
  • the user terminal is notified to perform positioning by sending a non-contention random access preamble sequence.
  • the user terminal sends the non-contention random access preamble sequence multiple times according to the specified number of times; if the trigger reason information is carried, the number of transmissions may be preset, for example, as specified in the protocol or notified by the network side. User terminal, such that the user terminal is determined to need to send by When the random access preamble sequence is located for positioning, the non-contention random access preamble sequence may be sent multiple times according to a preset number of transmission times.
  • multiple PRACH time-frequency resource information and multiple non-contention random access preamble sequences with no contention random access may be added to the indication information.
  • step 501 After the user terminal receives the indication information and sends the non-contention random access preamble sequence, if the random access response message (Msg2) is not received, the user terminal sends the non-contention random access preamble sequence again, using this point. , also achieved the effect of repeated transmissions. Specifically, in step 501, after receiving the non-contention random access preamble sequence, the network side does not send a random access response message to the user terminal (so the user terminal continues to retransmit the non-contention random access preamble sequence), When the number of received non-contention random access preamble sequences is equal to the set threshold, a random access response message is sent to the user terminal, indicating that the user terminal stops transmitting the non-contention random access preamble sequence.
  • Msg2 the random access response message
  • the size of the threshold can be set as needed.
  • the network side may receive a non-contention random access preamble sequence to determine a TA measurement value. After receiving all the non-contention random access preamble sequences, the network side may also receive random access according to each non-contention. The leading sequence is determined to determine the TA measurement.
  • the network side may add the determined plurality of TA measurements to average, obtain an average TA measurement value, and determine location information of the user terminal according to the average TA measurement value.
  • the network side may further determine location coordinates corresponding to each of the plurality of TA measurements, and average all the determined location coordinates, and determine the determined average coordinates as the location information of the user terminal.
  • the network side may receive a non-contention random access preamble sequence, and determine a TA measurement value and an AOA measurement value;
  • the TA measurement and the AOA measurement may be determined according to each of the non-contention random access preamble sequences after receiving all of the non-contention random access preamble sequences.
  • the network side may separately add the determined plurality of TA measurement values and the plurality of AOA measurement values to obtain an average TA measurement value and an average AOA measurement value, and according to the average TA.
  • the measured value and the average AOA measurement determine the location information of the user terminal.
  • the network side may further group the determined multiple TA measurements and the multiple AOA measurements.
  • TA measurement value and one AOA measurement value in each group There is one TA measurement value and one AOA measurement value in each group, and the TA measurement value and the AOA measurement value in the same group are determined by the same non-contention random access preamble sequence;
  • a position coordinate is determined based on the TA measurement value and the AOA measurement value in each group, and all the determined position coordinates are averaged, and the determined average coordinate is taken as the position information of the user terminal.
  • step 502 the network side specifically adopts which method can be set as needed.
  • the complexity of the user terminal is reduced.
  • the upgrade from CELL ID+TA positioning technology to CELL ID+TA+AOA positioning technology can be flexibly implemented without affecting the user terminal;
  • the TA measurement value and the AOA measurement value are all measured based on the same uplink transmission signal (preamble code), thereby improving the estimation accuracy; due to the uplink non-synchronization in the whole process
  • the transmission only has a preamble and also avoids uplink interference.
  • the network side determines the TA measurement value according to the actual arrival time and the expected arrival time of the non-contention random access preamble sequence from the user terminal according to the embodiment of the present invention;
  • the measured value determines the location information of the user terminal. Since the TA measurement value can be determined by the non-contention random access in the LTE system, the location information of the user terminal can be determined in the LTE system, and then the user terminal is located, and the solution of the embodiment of the present invention is simple and easy to implement. Further, various services can be provided by the positioning function user in the LTE system.

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Description

一种确定用户终端的位置信息的方法、 系统和装置 本申请要求在 2009年 5月 7日提交中国专利局、 申请号为 200910083875.1、 发明名称为"一种确定用户终端的位置信息的方法、系统和装置"的中国专利申 请的优先权。 技术领域
本发明涉及无线通信技术, 特别涉及一种确定用户终端的位置信息的方 法、 系统和装置。 背景技术
定位功能可以为用户提供各种服务, 比如工作、 娱乐、 生活等。 典型的 定位服务包括援助服务, 比如紧急医疗服务、 紧急定位等; 此外还有基于位 置的信息服务, 如寻找最近的餐饮娱乐信息、 黄页查询等; 还有广告服务, 比如促销打折信息; 还有基于位置的计费跟踪类的服务等。
用户终端(UE )定位技术主要分为三种类型: 第一种是由基于网络的服 务, 无需移动台帮助; 第二种是基于网络的服务和移动台的技术; 第三种是 GPS ( Global Positioning Systems, 全球定位系统)技术。
定位业务在时限上又有基于用户层面和基于控制层面两种方式: 基于控 制层面的方式,与位置相关的数据在标准的信令链路上,在用户终端与 SMLC ( Serving Mobile Location Centre, 服务移动位置中心) 间交互。 基于控制面 的业务主要是应用于紧急类业务。
在现有的 UMTS ( Universal Mobile Telecommunications System,通用移动 通信系统) 系统中, 使用了多种定位技术, 其中之一是基于网络的服务和移 动台的技术。
具体的, RNC ( Radio Network Controller, 无线网络控制器)触发用户终 端进行测量。 用户终端将测量结果以及测量该结果的时间(即系统帧号 SFN ) 上报给网络。 网络结合用户终端上 ^=艮的测量结果, 同时结合小区的地理位置 来判断该用户终端的位置。
目前的 LTE ( Long Term Evolution, 长期演进)系统中, 由于还没有一种 确定用户终端的位置信息的方案, 从而很难对用户终端进行定位。
综上所述, 目前在 LTE系统中, 由于还没有一种确定用户终端位置信息 的方案, 从而很难对用户终端进行定位。 发明内容
本发明实施例提供一种确定用户终端的位置信息的方法、 系统和装置, 用以解决 LTE系统中, 无法确定用户终端位置信息的问题。
本发明实施例提供的一种确定用户终端位置信息的方法, 该方法包括: 网络侧根据来自用户终端的无竟争随机接入前导序列的实际到达时刻和 期望到达时刻, 确定定时提前量 TA测量值;
所述网络側根据所述 TA测量值, 确定用户终端的位置信息。
本发明实施例提供的一种确定用户终端位置信息的系统, 该系统包括: 无线接入网设备, 用于根据来自用户终端的无竟争随机接入前导序列的 实际到达时刻和期望到达时刻, 确定定时提前量 TA测量值;
定位设备, 用于根据所述 TA测量值, 确定用户终端的位置信息。
本发明实施例提供的一种无线接入网设备, 该无线接入网设备包括: 接收模块, 用于接收来自用户终端的无竟争随机接入前导序列; 第一确定模块, 用于根据来自用户终端的无竟争随机接入前导序列的实 际到达时刻和期望到达时刻, 确定定时提前量 TA测量值。
本发明实施例网络侧根据来自用户终端的无竟争随机接入前导序列的实 际到达时刻和期望到达时刻,确定定时提前量 TA测量值; 所述网络侧根据所 述 TA测量值, 确定用户终端的位置信息。 由于在 LTE系统中能够通过无竟 争随机接入确定 TA测量值, 从而可以在 LTE系统中确定用户终端的位置信 息, 进而对用户终端进行定位, 并且本发明实施例的方案实现简单易行, 进 一步可以在 LTE系统中通过定位功能用户提供各种服务。 附图说明
图 1为本发明实施例 LTE TDD ( Time division duplex, 时分双工)系统定 时关系示意图;
图 2A为本发明实施例对用户终端进行定位示意图一;
图 2B为本发明实施例对用户终端进行定位示意图二;
图 3为本发明实施例确定用户终端位置信息的系统结构示意图; 图 4为本发明实施例无线接入网设备结构示意图;
图 5为本发明实施例确定用户终端位置信息的方法流程示意图。 具体实施方式
本发明实施例网络侧根据来自用户终端的无竟争随机接入前导序列的实 际到达时刻和期望到达时刻, 确定定时提前量 TA测量值; 网络側根据 TA测 量值, 确定用户终端的位置信息。 由于在 LTE系统中能够通过无竟争随机接 入确定 TA测量值, 从而可以在 LTE系统中确定用户终端的位置信息, 进而 对用户终端进行定位。
如图 1所示, 本发明实施例 LTE TDD系统定时关系示意图中, T代表每 个子帧的长度, L0代表 preamble (随机接入前导序列) 所在上行子帧的位置 提前量(取决于帧结构), L_p代表 preamble的长度 (取决于 preamble format 等因素)。
下行子帧到达时已经有了 delta—tl 的延迟。 上行方向 preamble到达无线 接入网设备侧时会再次延后 delta—t2。
综合看来, 在网络侧, preamble 的期望到达时刻 (preamble序列信号的 接收完毕的期望时刻) tl=T+L0+L_p。 而网络侧的 preamble 的实际到达时刻 ( preamble序列信号的接收完毕的实际时刻) t2= tl+delta— tl+delta—t2。 二者 相差 delta— tl+delta J2。 由于用户终端接收指示信息和发送 preamble的时间很短, 即用户终端和 无线接入网设备间的距离可以近似认为不变, 所以上述 deltajl和 delta_t2是 相等的, 因此用 户 终端和无线接入网设备之间 的距离 即为 d=( delta_tl+delta_t2)*(l/2)*C ( C为光速)。
本发明实施例在用户终端实现的时候可以在发送 preamble码之前使用最 新的下行定时, 或者直接进行一次下行同步过程得到最新的下行定时, 这样 就保证了下行传播时延和上行传播时延的大致相同。
这样基站通过接收 preamble, 可获得 TA ( Timing Advance, 定时提前量) 测量值, 然后可以估计出用户终端和基站的相对距离, 在结合已知的基站地 理位置信息可以实现 CELL ID+TA的定位方法。
此外基站还可以通过对 preamble信号的处理, 额外获得到达方位角 ( Angle of Arrival, AOA )测量值, 从而获得从基站侧看到的用户终端的方位 角信息, 从而进一步实现 CELL ID+TA+AOA的定位方法。
需要说明的是,本发明实施例可以适用于 LTE系统, 图 1的 LTE TDD系 统只是举例说明, 本发明实施例还可以应用于 LTE FDD ( Frequency division duplex, 频分双工) 系统中。
本发明实施例中的无线接入网设备可以是基站或中继节点(RN )设备。 如图 2A所示, 本发明实施例对用户终端进行定位示意图一中, 在确定 TA测量值后,就能够确定用户终端处于以无线接入网设备为圆心、距离为 TA 测量值的半径的圆周上; 即确定了用户终端和无线接入网设备的相对地理位 置。 由于各个无线接入网设备的绝对地理位置(如经纬度等地理信息)是已 知的, 那么根据用户终端当前所在的无线接入网设备的 CELL ID, 可以查到 该无线接入网设备的绝对地理位置, 再结合刚刚得到的用户终端和无线接入 网设备的相对位置,最终得到用户终端的绝对地理位置, 实现了 CELL ID+TA 的定位方法。
如图 2B 所示, 本发明实施例对用户终端进行定位示意图二中, 在确定 TA测量值后, 就能够确定用户终端就处于以无线接入网设备为圆心、 距离为 TA测量值的半径的圆周上;
在确定 AOA ( Angel Of Arrival, 到达角度)测量值后, 就知道用户终端 处于以无线接入网设备为起点的射线上, 且射线从正北方向逆时针旋转的角 度为 AOA测量值;
上述 TA测量值和 AOA测量值相结合, 即可在以无线接入网设备为圆心 的极坐标系中唯一确定用户终端相对于无线接入网设备的位置;
由于各个无线接入网设备的绝对地理位置(如经纬度等地理信息)是已 知的, 那么根据用户终端当前所在的无线接入网设备的 CELL ID, 可以查到 该无线接入网设备的绝对地理位置, 再结合刚刚得到的用户终端和无线接入 网设备的相对位置, 即可最终得到用户终端的绝对地理位置坐标。
需要说明的是, 正北方向逆时针旋转只是举例说明, 根据需要可以将任 一方向作为标准方式, 旋转角度也可以改变, 比如可以将正南方向顺时针旋 转作为标准。 当然, 在标准方式修改后, 相应的在测量 AOA测量值时也需要 进行相应调整。
本发明实施例使用无竟争随机接入的原因是, 有竟争的随机接入过程中, 同一个 preamble码可能同时被多个用户终端所使用(即发生了碰撞), 网络侧 无法将 preamble和用户终端" "一对应起来, 而采用无竟争随机接入就可以保 证 preamble码是某个用户终端专用的, 这样网络侧测量后就可以将测量值和 用户终端 对应起来。
下面结合说明书附图对本发明实施例作进一步详细描述,
如图 3所示, 本发明实施例确定用户终端位置信息的系统包括: 无线接 入网设备 10和定位设备 20。
无线接入网设备 10, 用于根据来自用户终端的无竟争随机接入前导序列 的实际到达时刻和期望到达时刻, 确定 TA测量值;
定位设备 20, 用于根据无线接入网设备 10确定的 TA测量值, 确定用户 终端的位置信息。
其中, 定位设备 20可以是网络中的任意设备(如基站 10 ), 也可以是其 他单独的网络侧设备, (如定位中心 SMLC ), 还可以是一个新的设备。
在具体实施过程中, 有两种定位方式, 1 )根据 TA测量值确定用户终端 的位置信息; 2 )根据 TA测量值和 AOA测量值确定用户终端的位置信息。
对于第一种方式, 无线接入网设备 10在确定收到的来自用户终端的无竟 争随机接入前导序列的实际到达时刻, 对实际到达时刻和期望到达时刻做差, 得到的值作为 TA, 并将 TA除以 2, 得到的值作为 TA测量值。
相应的,定位设备 20根据无线接入网设备 10确定的 TA测量值,确定用 户终端的位置信息。
其中, 期望到达时刻, 是根据网络侧根据下行定时、 设定的 PRACH ( Physical Random Access Channel, 物理随机接入信道) 资源位置, 以及 preamble信号的发送位置来获得的,例如图 1中, 网络侧设定的 PRACH资源 位于该上行子帧, 该上行子帧的起始位置记为 T, 网络侧确定 preamble发送 时刻是在该上行子帧头之后 L0时刻, 而 preamble长度为 L_p, 那么期望的时 刻即为 T+L0+L_p。
对于第二种定位方式, 无线接入网设备 10除了需要确定 TA测量值外, 还需要测量收到的来自用户终端的无竟争随机接入前导序列的信号角度, 根 据测量的信号角度确定到达角度 AOA测量值;
相应的, 定位设备 20根据无线接入网设备 10确定的 TA测量值和 AOA 测量值确定用户终端的位置信息„
如果无线接入网设备 10只确定 TA测量值(即采用 CELL ID + TA的定位 方式), 可以降低无线接入网设备复杂度, 节省成本, 但是相比无线接入网设 备 10确定 TA测量值和 AOA测量值(即采用 CELL ID + TA + AOA的方式), 定位的准确度就会降低。
具体采用哪种定位方式可以根据需要进行选择。
无线接入网设备 10在接收来自用户终端的无竟争随机接入前导序列之 前, 需要向用户终端发送进行无竟争随机接入的指示信息, 指示信息中包括 PRACH时频资源信息、 无竟争随机接入前导序列 (即 preamble码)等。 其中, 指示信息可以是下列信息中的一种:
PDCCH ( hysical downlink control channel, 物理下行控制信道)、 MAC ( Media Access Control, 媒体接入控制)控制 PDU ( Protocol Data Unit, 协议 数据单元)、 RRC ( Radio Resource Control, 无线资源控制)信令。
其中, 无线接入网设备 10可以只接收一次无竟争随机接入前导序列, 定 位设备 20就进行定位, 这样可以节省网络资源, 但是定位精度不高。 为了提 高定位精度, 无线接入网设备 10可以多次接收无竟争随机接入前导序列, 确 定多个测量值, 并进行定位, 这样可以提高定位精度。
如果要用户终端多次发送无竟争随机接入前导序列, 可以在指示信息中 携带需要用户终端发送无竟争随机接入前导序列的次数, 或指示信息中携带 触发原因信息, 触发原因信息用于通知用户终端通过发送无竟争随机接入前 导序列进行定位。
如果是携带次数, 则用户终端根椐指定的次数, 多次发送无竟争随机接 入前导序列; 如果携带的是触发原因信息, 则可以预先设定发送次数, 比如 在协议规定或由网络侧通知用户终端, 这样用户终端在确定需要通过发送无 竟争随机接入前导序列进行定位时, 可以根据预先设定的发送次数, 多次发 送无竟争随机接入前导序列。
在具体实施过程中, 还可以在指示信息中添加多次无竟争随机接入的多 个 PRACH时频时频资源信息和多个无竟争随机接入前导序列。
由于用户终端在收到指示信息并发送无竟争随机接入前导序列后, 如果 没有收到随机接入响应消息( Msg2 ),用户终端会再次发送无竟争随机接入前 导序列, 利用这一点, 也就达到了多次重复发送的效果。 具体的, 无线接入 网设备 10在收到无竟争随机接入前导序列后, 不向用户终端发送随机接入响 应消息(因此用户终端会继续重发无竟争随机接入前导序列), 在收到的无竟 争随机接入前导序列的次数等于设定的阈值时, 向用户终端发送随机接入响 应消息, 指示用户终端停止发送无竟争随机接入前导序列„
闲值的大小可以根据需要进行设定。 其中, 如果根据 TA测量值确定用户终端的位置信息:
无线接入网设备 10可以收到一个无竟争随机接入前导序列, 就确定一个 TA测量值; 也可以在收到所有无竟争随机接入前导序列后, 跟据每个无竟争 随机接入前导序列确定 TA测量值。
然后, 定位设备 20可以将确定的多个 TA测量值相加取平均, 得到平均 TA测量值, 并根据平均 TA测量值确定用户终端的位置信息。
定位设备 20还可以确定多个 TA测量值中每个 TA测量值对应的位置坐 标, 并将确定的所有位置坐标取平均, 将确定的平均坐标作为用户终端的位 置信息。
比如一共有 3个位置坐标(Xl, Yl )、 ( Χ2, Υ2 )和(Χ3, Υ3 ), 则平均 坐标是( 1+Χ2+Χ3^ Υ1+Υ2+Υ3 )。 其中, 如果根据 ΤΑ测量值和 ΑΟΑ测量值确定用户终端的位置信息: 无线接入网设备 10可以收到一个无竟争随机接入前导序列, 就确定一个 ΤΑ测量值和一个 ΑΟΑ测量值; 也可以在收到所有无竟争随机接入前导序列 后, 根据每个无竟争随机接入前导序列确定 ΤΑ测量值和 ΑΟΑ测量值。
然后, 定位设备 20可以分别将确定的多个 ΤΑ测量值和多个 ΑΟΑ测量 值相加取平均, 得到平均 ΤΑ测量值和平均 ΑΟΑ测量值, 并根据平均 ΤΑ测 量值和平均 ΑΟΑ测量值确定用户终端的位置信息。
定位设备 20还可以将确定的多个 ΤΑ测量值和多个 ΑΟΑ测量值进行分 组。
其中, 每组中有一个 ΤΑ测量值和一个 ΑΟΑ测量值, 同组中的 ΤΑ测量 值和 ΑΟΑ测量值是由同一个无竟争随机接入前导序列确定的;
根据每组中的 ΤΑ测量值和 ΑΟΑ测量值确定一个位置坐标, 将确定的所 有位置坐标取平均, 将确定的平均坐标作为用户终端的位置信息。
定位设备 20具体采用哪种方式可以根据需要进行设定。
如图 4所示, 本发明实施例的无线接入网设备包括: 接收模块 100和第 一确定模块 110。
接收模块 100, 用于接收来自用户终端的无竟争随机接入前导序列; 第一确定模块 110,用于根据接收模块 100收到的来自用户终端的无竟争 随机接入前导序列的实际到达时刻和期望到达时刻, 确定 TA测量值。
其中,本发明实施例的无线接入网设备还可以进一步包括:定位模块 120。 定位模块 120, 用于根据第一确定模块 110确定的 TA测量值, 确定用户 终端的位置信息。
在具体实施过程中, 定位模块 120有两种定位方式, 1 )根据 TA测量值 确定用户终端的位置信息; 2 )根据 TA测量值和 AOA测量值确定用户终端 的位置信息。
对于第一种方式,第一确定模块 110确定 TA测量值的方式与图 3中无线 接入网设备 10确定 TA测量值的方式相同, 不再赘述。
相应的,定位模块 120根据第一确定模块 110确定的 TA测量值,确定用 户终端的位置信息。
对于第二种定位方式, 本发明实施例的无线接入网设备还可以进一步包 括: 第二确定模块 130。
第二确定模块 130,用于测量接收模块 100收到的来自用户终端的无竟争 随机接入前导序列的信号角度,根据测量的信号角度确定到达角度 AOA测量 值。
相应的,定位模块 120根据第一确定模块 110确定的 TA测量值和第二确 定模块 120确定的 AOA测量值确定用户终端的位置信息。
具体釆用哪种定位方式可以根据需要进行选择。
无线接入网设备在接收来自用户终端的无竟争随机接入前导序列之前, 需要向用户终端发送进行无竟争随机接入的指示信息, 则本发明实施例的无 线接入网设备还可以进一步包括: 指示模块 140。
指示模块 140,用于在接收模块 100接收来自用户终端的无竟争随机接入 前导序列之前, 向用户终端发送进行无竟争随机接入的指示信息。 指示信息中包括 PRACH 时频资源信息、 无竟争随机接入前导序列 (即 preamble码)等。
如果要用户终端多次发送无竟争随机接入前导序列, 指示模块 140可以 在指示信息中携带需要用户终端发送无竟争随机接入前导序列的次数, 或指 示信息中携带触发原因信息, 触发原因信息用于通知用户终端通过发送无竟 争随机接入前导序列进行定位。
如果是携带次数, 则用户终端根据指定的次数, 多次发送无竟争随机接 入前导序列; 如果携带的是触发原因信息, 则可以预先设定发送次数, 比如 在协议规定或由网络侧通知用户终端, 这样用户终端在确定需要通过发送无 竟争随机接入前导序列进行定位时, 可以根据预先设定的发送次数多次发送 无竟争随机接入前导序列。
在具体实施过程中, 还可以在指示信息中添加多次无竟争随机接入的多 个 PRACH时频资源信息和多个无竟争随机接入前导序列。
由于用户终端在收到指示信息并发送无竟争随机接入前导序列后, 如果 没有收到随机接入响应消息( Msg2 ),用户终端会再次发送无竟争随机接入前 导序列, 这样也就达到了多次重复发送的效果。 则本发明实施例的无线接入 网设备还可以进一步包括: 发送模块 150。
发送模块 150, 用于在接收模块 100收到无竟争随机接入前导序列后, 查 看接收到的无竟争随机接入前导序列的次数是否等于预先设定的阈值, 如果 不等, 则不向用户终端发送随机接入响应消息; 否则, 向用户终端发送随机 接入响应消息, 指示用户终端停止发送无竟争随机接入前导序列。
阈值的大小可以根据需要进行设定。
其中, 如杲根据 TA测量值确定用户终端的位置信息:
第一确定模块 110可以在接收模块 100收到一个无竟争随机接入前导序 列,就确定一个 TA测量值; 也可以在接收模块 100收到所有无竟争随机接入 前导序列后, 跟据每个无竟争随机接入前导序列确定 TA测量值。
定位模块 120根据多个 TA测量值确定用户终端的定位信息的方式与图 3 中定位设备 20根据多个 TA测量值确定用户终端的定位信息的方式相同, 不 再赘述。
其中, 如果根据 TA测量值和 AOA测量值确定用户终端的位置信息: 第一确定模块 110和第二确定模块 120可以在接收模块 100收到一个无 竟争随机接入前导序列, 分别确定一个 TA测量值和一个 AOA测量值; 也可 以在接收模块 100收到所有无竟争随机接入前导序列后, 根据每个无竟争随 机接入前导序列分别确定 TA测量值和 AOA测量值。
定位模块 120根椐多个 TA测量值和多个 AOA测量值确定用户终端的定 位信息的方式与图 3中定位设备 20根据多个 TA测量值和多个 AOA测量值 确定用户终端的定位信息的方式相同, 不再赘述。
定位模块 120具体采用哪种方式可以根据需要进行设定。
如图 5所示, 本发明实施例确定用户终端位置信息的方法包括下列步骤: 步骤 501、网络侧根据来自用户终端的无竟争随机接入前导序列的实际到 达时刻和期望到达时刻, 确定 TA测量值。
步驟 502、 网络侧根据确定的 TA测量值, 确定用户终端的位置信息。 步骤 502中, 网络侧有两种定位方式, 1 )根据 TA测量值确定用户终端 的位置信息; 2 )根据 TA测量值和 AOA测量值确定用户终端的位置信息。
对于第一种方式, 步骤 501 中网络侧在确定收到的来自用户终端的无竟 争随机接入前导序列的实际到达时刻, 对实际到达时刻和期望到达时刻做差, 得到的值作为 TA, 并将 TA除以 2, 得到的值作为 TA测量值。
相应的,步骤 502中网络侧根据确定的 TA测量值,确定用户终端的位置 信息。
其中,期望到达时刻是根据网络侧根据下行定时、设定的 PRACH资源位 置, 以及 preamble信号的发送位置来获得的, 例如图 1 中, 网络侧设定的 PRACH资源位于该上行子帧, 该上行子帧的起始位置记为 T, 网络侧确定 preamble发送时刻是在该上行子帧头之后 L0时刻, 而 preamble长度为 L_p, 那么期望的时刻即为 T+L0+L_p。 对于第二种定位方式, 步骤 501中网络侧除了需要确定 TA测量值外,还 需要测量收到的来自用户终端的无竟争随机接入前导序列的信号角度, 根据 测量的信号角度确定到达角度 AOA测量值;
相应的, 步骤 502中网络侧根据确定的 TA测量值和 AOA测量值确定用 户终端的位置信息。
如果步骤 501中网络侧只确定 TA测量值 (即采用 CELL ID + TA的定位 方式), 可以降低无线接入网设备复杂度, 节省成本, 但是相比确定 TA测量 值和 AOA测量值(即采用 CELL ID + TA + AOA的方式),定位的准确度就会 降低。
具体采用哪种定位方式可以根据需要进行选择。
其中, 步骤 501之前还可以进一步包括:
步骤 500、 网络侧向用户终端发送进行无竟争随机接入的指示信息,指示 信息中包括 PRACH时频资源信息、 无竟争随机接入前导序列 (即 preamble 码)等。
其中, 指示信息可以是下列信息中的一种:
PDCCH、 MAC控制 PDU、 RRC信令等。
其中, 步骤 501 中网络侧可以只接收一次无竟争随机接入前导序列, 就 进行定位, 这样可以节省网络资源, 但是定位精度不高。 为了提高定位精度, 网络侧可以多次接收无竟争随机接入前导序列, 确定多个测量值, 并进行定 位, 这样可以提高定位精度。
如果要用户终端多次发送无竟争随机接入前导序列, 可以在指示信息中 携带需要用户终端发送无竟争随机接入前导序列的次数, 或指示信息中携带 触发原因信息, 触发原因信息用于通知用户终端通过发送无竟争随机接入前 导序列进行定位。
如果是携带次数, 则用户终端根据指定的次数, 多次发送无竟争随机接 入前导序列; 如果携带的是触发原因信息, 则可以预先设定发送次数, 比如 在协议规定或由网络侧通知用户终端, 这样用户终端在确定需要通过发送无 竟争随机接入前导序列进行定位时, 可以根据预先设定的发送次数多次发送 无竟争随机接入前导序列。
在具体实施过程中, 还可以在指示信息中添加多次无竟争随机接入的多 个 PRACH时频资源信息和多个无竟争随机接入前导序列。
由于用户终端在收到指示信息并发送无竟争随机接入前导序列后, 如果 没有收到随机接入响应消息( Msg2 ),用户终端会再次发送无竟争随机接入前 导序列, 利用这一点, 也就达到了多次重复发送的效果。 具体的, 步骤 501 中网络侧在收到无竟争随机接入前导序列后, 不向用户终端发送随机接入响 应消息(因此用户终端会继续重发无竟争随机接入前导序列), 在收到的无竟 争随机接入前导序列的次数等于设定的阈值时, 向用户终端发送随机接入响 应消息, 指示用户终端停止发送无竟争随机接入前导序列。
阈值的大小可以根据需要进行设定。
其中, 如果根据 TA测量值确定用户终端的位置信息 ·:
步骤 501 中网络侧可以收到一个无竟争随机接入前导序列, 就确定一个 TA测量值; 也可以在收到所有无竟争随机接入前导序列后, 跟据每个无竟争 随机接入前导序列确定 TA测量值。
然后, 步骤 502中网络侧可以将确定的多个 TA测量值相加取平均,得到 平均 TA测量值, 并根据平均 TA测量值确定用户终端的位置信息。
步骤 502中网络侧还可以确定多个 TA测量值中每个 TA测量值对应的位 置坐标, 并将确定的所有位置坐标取平均, 将确定的平均坐标作为用户终端 的位置信息。
其中, 如果根椐 TA测量值和 AOA测量值确定用户终端的位置信息: 步骤 501 中网络侧可以收到一个无竟争随机接入前导序列, 就确定一个 TA测量值和一个 AOA测量值; 也可以在收到所有无竟争随机接入前导序列 后, 根据每个无竟争随机接入前导序列确定 TA测量值和 AOA测量值。
然后, 步骤 502中网络侧可以分别将确定的多个 TA测量值和多个 AOA 测量值相加取平均,得到平均 TA测量值和平均 AOA测量值,并根据平均 TA 测量值和平均 AOA测量值确定用户终端的位置信息。
步骤 502中网络侧还可以将确定的多个 TA测量值和多个 AOA测量值进 行分组,
其中每组中有一个 TA测量值和一个 AOA测量值, 同组中的 TA测量值 和 AOA测量值是由同一个无竟争随机接入前导序列确定的;
根据每组中的 TA测量值和 AOA测量值确定一个位置坐标, 将确定的所 有位置坐标取平均, 将确定的平均坐标作为用户终端的位置信息。
步骤 502中网络侧具体采用哪种方式可以根据需要进行设定。
由于 TA测量值和 AOA测量值的在网络侧进行测量, 从而降低了用户终 端的复杂度。 此外, 可以灵活地实现从 CELL ID+TA 定位技术到 CELL ID+TA+AOA定位技术的升级, 不影响用户终端;
当采用 CELL ID+TA+AOA技术时, TA测量值和 AOA测量值都是基于 相同的上行传输信号(preamble码)进行测量的, 从而提高了估计精度; 由于整个过程中, 上行方向的非同步传输只有 preamble, 还避免了上行 干扰。
从上述实施例中可以看出: 本发明实施例网络侧根据来自用户终端的无 竟争随机接入前导序列的实际到达时刻和期望到达时刻,确定 TA测量值; 所 述网络侧根据所述 TA测量值, 确定用户终端的位置信息。 由于在 LTE系统 中能够通过无竟争随机接入确定 TA测量值, 从而可以在 LTE系统中确定用 户终端的位置信息, 进而对用户终端进行定位, 并且本发明实施例的方案实 现简单易行, 进一步可以在 LTE系统中通过定位功能用户提供各种服务。
显然,本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发 明的精神和范围。 这样, 倘若本发明的这些修改和变型属于本发明权利要求 及其等同技术的范围之内, 则本发明也意图包含这些改动和变型在内。

Claims

权 利 要 求
1、 一种确定用户终端位置信息的方法, 其特征在于, 该方法包括: 网络侧根据来自用户终端的无竟争随机接入前导序列的实际到达时刻和 期望到达时刻, 确定定时提前量 TA测量值;
所述网络侧根据所述 TA测量值, 确定用户终端的位置信息。
2、 如权利要求 1所述的方法, 其特征在于, 所述网络侧确定 TA测量值 包括: 到达时刻;
所述网络侧对所述实际到达时刻和期望到达时刻做差,得到的值作为 TA; 所述网络侧将所述 TA除以 2, 得到的值作为所述 TA测量值。
3、 如权利要求 1或 2所述的方法, 其特征在于, 所述网络侧确定用户终 端的位置信息之前还包括:
所述网络侧测量收到的来自用户终端的无竟争随机接入前导序列的信号 角度, 根据测量的信号角度确定到达角度 AOA测量值;
所述网络侧确定用户终端的位置信息包括:
所述网络侧根据所述 TA测量值和所述 AOA测量值确定用户终端的位置 信息。
4、 如权利要求 1或 2所述的方法, 其特征在于, 所述方法还包括: 所述网络侧多次接收到来自用户终端的无竟争随机接入前导序列; 所述网络侧确定 TA测量值包括:
所述网络侧 居来自用户终端的多个无竟争随机接入前导序列的实际到 达时刻和期望到达时刻, 确定多个 TA测量值。
5、 如权利要求 4所述的方法, 其特征在于, 所述网络侧接收到的来自用 户终端的无竟争随机接入前导序列之前还包括:
所述网络侧向用户终端发送进行无竟争随机接入的指示信息, 其中所述 指示信息中携带需要用户终端发送无竟争随机接入前导序列的次数, 或所述 指示信息中携带触发原因信息, 所述触发原因信息用于通知用户终端通过发 送无竟争随机接入前导序列进行定位。
6、 如权利要求 4所述的方法, 其特征在于, 所述网络侧多次接收到来自 用户终端的无竟争随机接入前导序列之后还包括:
所述网络侧在收到的无竟争随机接入前导序列的次数等于设定的阈值 时, 向所述用户终端发送随机接入响应消息, 指示用户终端停止发送无竟争 随机接入前导序列。
7、 如权利要求 4所述的方法, 其特征在于, 所述网络侧确定用户终端的 位置信息包括:
所述网络侧将确定的多个 TA测量值相加取平均, 得到平均 TA测量值, 并才艮据所述平均 TA测量值确定用户终端的位置信息。
8、 如权利要求 7所述的方法, 其特征在于, 所述网络侧确定用户终端的 位置信息之前包括:
所述网络侧测量收到的来自用户终端的多个无竟争随机接入前导序列的 信号角度, 根据测量的多个信号角度, 确定多个 AOA测量值;
所述网络侧确定用户终端的位置信息包括:
所述网络侧将确定的多个 AOA测量值相加取平均, 得到平均 AOA测量 值, 并才艮椐所述平均 TA测量值和所述平均 AOA测量值确定用户终端的位置 信息。
9、 如权利要求 4所述的方法, 其特征在于, 所述网络侧确定用户终端的 位置信息包括:
所述网络侧确定多个 TA测量值中每个 TA测量值对应的位置坐标, 并将 确定的所有位置坐标取平均, 将确定的平均坐标作为用户终端的位置信息。
10、 如权利要求 9所述的方法, 其特征在于, 所述网络侧确定用户终端 的位置信息之前包括:
所述网络侧测量收到的来自用户终端的多个无竟争随机接入前导序列的 信号角度, 根据测量的多个信号角度, 确定多个 AOA测量值; 所述网络侧确定用户终端的位置信息包括:
所述网络側将确定的多个 TA测量值和多个 AOA测量值进行分组, 其中 每组中有一个 TA测量值和一个 AOA测量值,同组中的 TA测量值和 AOA测 量值是由同一个无竟争随机接入前导序列确定的;
所述网络侧根据每组中的 TA测量值和 AOA测量值确定一个位置坐标; 所述网络侧将确定的所有位置坐标取平均, 将确定的平均坐标作为用户 终端的位置信息。
11、 一种确定用户终端位置信息的系统, 其特征在于, 该系统包括: 无线接入网设备, 用于根据来自用户终端的无竟争随机接入前导序列的 实际到达时刻和期望到达时刻 , 确定定时提前量 TA测量值;
定位设备, 用于根据所述 TA测量值, 确定用户终端的位置信息。
12、 如权利要求 11所迷的系统, 其特征在于, 所述无线接入网设备具体 用于: ' 对所述实际到达时刻和期望到达时刻做差, 得到的值作为 TA, 将所述 TA除 以 2, 得到的值作为所迷 TA测量值。
13、 如权利要求 11或 12所述的系统, 其特征在于, 所述无线接入网设 备还用于:
测量收到的来自用户终端的无竟争随机接入前导序列的信号角度, 根据 测量的信号角度确定到达角度 AOA测量值;
所述定位设备还用于:
根据所述 TA测量值和所述 AOA测量值确定用户终端的位置信息。
14、 如权利要求 11或 12所述的系统, 其特征在于, 所述无线接入网设 备还用于:
多次接收到来自用户终端的无竟争随机接入前导序列;
则所述无线接入网设备根据来自用户终端的多个无竟争随机接入前导序 列的实际到达时刻和期望到达时刻, 确定多个 TA测量值。
15、 如权利要求 14所述的系统, 其特征在于, 所述无线接入网设备还用 于:
在接收到的来自用户终端的无竟争随机接入前导序列之前, 向用户终端 发送进行无竟争随机接入的指示信息, 其中所述指示信息中携带需要用户终 端发送无竟争随机接入前导序列的次数, 或所述指示信息中携带触发原因信 息, 所述触发原因信息用于通知用户终端通过发送无竟争随机接入前导序列 进行定位。
16、 如权利要求 14所述的系统, 其特征在于, 所述无线接入网设备还用 于:
在收到的无竟争随机接入前导序列的次数等于设定的阈值时, 向所述用 户终端发送随机接入响应消息, 指示用户终端停止发送无竟争随机接入前导 序列。
17、 如权利要求 14所述的系统, 其特征在于, 所述定位设备具体用于: 将确定的多个 TA测量值相加取平均 , 得到平均 TA测量值, 并根据所述 平均 TA测量值确定用户终端的位置信息。
18、 如权利要求 17所述的系统, 其特征在于, 所述无线接入网设备还用 于:
测量收到的来自用户终端的多个无竟争随机接入前导序列的信号角度, 根据测量的多个信号角度, 确定多个 AOA测量值;
所述定位设备用于:
将确定的多个 AOA测量值相加取平均, 得到平均 AOA测量值, 并根据 所述平均 TA测量值和所述平均 AOA测量值确定用户终端的位置信息。
19、 如权利要求 14所述的系统, 其特征在于, 所述定位设备具体用于: 确定多个 TA测量值中每个 TA测量值对应的位置坐标, 并将确定的所有 位置坐标取平均, 将确定的平均坐标作为用户终端的位置信息。
20、 如权利要求 19所迷的系统, 其特征在于, 所述无线接入网设备还用 于:
测量收到的来自用户终端的多个无竟争随机接入前导序列的信号角度, 根据测量的多个信号角度, 确定多个 AOA测量值;
所述定位设备用于:
将确定的多个 TA测量值和多个 AOA测量值进行分组, 其中每组中有一 个 TA测量值和一个 AOA测量值,同组中的 TA测量值和 AOA测量值是由同 一个无竟争随机接入前导序列确定的, 根据每组中的 TA测量值和 AOA测量 值确定一个位置坐标, 将确定的所有位置坐标取平均, 将确定的平均坐标作 为用户终端的位置信息。
21、 一种无线接入网设备, 其特征在于, 该无线接入网设备包括: 接收模块, 用于接收来自用户终端的无竟争随机接入前导序列; 第一确定模块, 用于根据来自用户终端的无竟争随机接入前导序列的实 际到达时刻和期望到达时刻, 确定定时提前量 TA测量值。
22、 如权利要求 21所述的无线接入网设备, 其特征在于, 所述无线接入 网设备还包括:
定位模块, 用于根据所述 TA测量值, 确定用户终端的位置信息。
23、 如权利要求 22所述的无线接入网设备, 其特征在于, 所述第一确定 模块具体用于:
确定收到的来自用户终端的无竟争随机接入前导序列的实际到达时刻, 对所述实际到达时刻和期望到达时刻做差, 得到的值作为 TA, 将所述 TA除 以 2, 得到的值作为所述 TA测量值。
24、 如权利要求 22或 23所述的无线接入网设备, 其特征在于, 所述无 线接入网设备还包括:
第二确定模块, 用于测量收到的来自用户终端的无竟争随机接入前导序 列的信号角度, 根据测量的信号角度确定到达角度 AOA测量值;
所述定位模块用于:
根据所述 TA测量值和所述 AOA测量值确定用户终端的位置信息。
25、 如权利要求 22或 23所述的无线接入网设备, 其特征在于, 所述接 收模块具体用于:
多次接收到来自用户终端的无竟争随机接入前导序列;
所述第一确定模块用于:
才艮据来自用户终端的多个无竟争随机接入前导序列的实际到达时刻和期 望到达时刻, 确定多个 TA测量值。
26、 如权利要求 25所述的无线接入网设备, 其特征在于, 所述无线接入 网设备还包括:
指示模块, 用于在所述接收模块接收到的来自用户终端的无竟争随机接 入前导序列之前, 向用户终端发送进行无竟争随机接入的指示信息, 其中所 述指示信息中携带需要用户终端发送无竟争随机接入前导序列的次数, 或所 述指示信息中携带触发原因信息, 所述触发原因信息用于通知用户终端通过 发送无竟争随机接入前导序列进行定位。
27、 如权利要求 25所述的无线接入网设备, 其特征在于, 所述无线接入 网设备还包括:
发送模块,用于在所述接收模块收到的无竟争随机接入前导序列的次数等 于设定的阈值时, 向所述用户终端发送随机接入响应消息, 指示用户终端停 止发送无竟争随机接入前导序列。
28、 如权利要求 25所述的无线接入网设备, 其特征在于, 所述第一确定 模块具体用于:
将确定的多个 TA测量值相加取平均, 得到平均 TA测量值, 并根据所述 平均 TA测量值确定用户终端的位置信息。
29、 如权利要求 28所述的无线接入网设备, 其特征在于, 所述第二确定 模块具体用于:
测量收到的来自用户终端的多个无竟争随机接入前导序列的信号角度, 根据测量的多个信号角度, 确定多个 AOA测量值;
所述定位模块用于: 将确定的多个 AOA测量值相加取平均, 得到平均 AOA测量值, 并根据 所述平均 TA测量值和所述平均 AOA测量值确定用户终端的位置信息。
30、 如权利 ^"求 25所述的无线接入网设备, 其特征在于, 所述第一确定 模块具体用于:
确定多个 TA测量值中每个 TA测量值对应的位置坐标, 并将确定的所有 位置坐标取平均, 将确定的平均坐标作为用户终端的位置信息。
31、 如权利要求 30所述的无线接入网设备, 其特征在于, 所述第二确定 模块具体用于:
测量收到的来自用户终端的多个无竟争随机接入前导序列的信号角度, 根据测量的多个信号角度, 确定多个 AOA测量值;
所述定位模块用于:
将确定的多个 TA测量值和多个 AOA测量值进行分组, 其中每组中有一 个 TA测量值和一个 AOA测量值,同组中的 TA测量值和 AOA测量值是由同 一个无竟争随机接入前导序列确定的, 根据每组中的 TA测量值和 AOA测量 值确定一个位置坐标, 将确定的所有位置坐标取平均, 将确定的平均坐标作 为用户终端的位置信息。
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