WO2016070347A1 - 一种获取位置信息的方法及装置 - Google Patents

一种获取位置信息的方法及装置 Download PDF

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Publication number
WO2016070347A1
WO2016070347A1 PCT/CN2014/090312 CN2014090312W WO2016070347A1 WO 2016070347 A1 WO2016070347 A1 WO 2016070347A1 CN 2014090312 W CN2014090312 W CN 2014090312W WO 2016070347 A1 WO2016070347 A1 WO 2016070347A1
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WO
WIPO (PCT)
Prior art keywords
signal
base stations
base station
relative power
sent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
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PCT/CN2014/090312
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English (en)
French (fr)
Inventor
崔杰
李伊婕
苏滨
李安俭
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to RU2017119001A priority Critical patent/RU2665229C1/ru
Priority to AU2014410620A priority patent/AU2014410620B2/en
Priority to PCT/CN2014/090312 priority patent/WO2016070347A1/zh
Priority to CN201480083204.4A priority patent/CN107113690A/zh
Priority to EP14905405.8A priority patent/EP3209063A4/en
Publication of WO2016070347A1 publication Critical patent/WO2016070347A1/zh
Priority to US15/586,750 priority patent/US9913097B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO 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
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02—Position-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
    • G01S5/0252—Radio frequency fingerprinting
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO 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
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02—Position-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
    • G01S5/10—Position of receiver fixed by co-ordinating a plurality of position lines defined by path-difference measurements, e.g. omega or decca systems
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO 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
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02—Position-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
    • G01S5/14—Determining absolute distances from a plurality of spaced points of known location
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/20—Monitoring; Testing of receivers
    • H04B17/27—Monitoring; Testing of receivers for locating or positioning the transmitter
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/336—Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H04W4/025—Services making use of location information using location based information parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/20—Communication route or path selection, e.g. power-based or shortest path routing based on geographic position or location
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems

Definitions

  • the present invention relates to the field of mobile communications, and in particular, to a method and apparatus for acquiring location information.
  • the server needs to obtain the location information of the terminal corresponding to the user, and sends the obtained location information to the terminal corresponding to the user.
  • the path navigation is a kind of location service.
  • the server needs to obtain the location information of the terminal corresponding to the user, and sends the obtained location information to the terminal corresponding to the user.
  • a terminal to be located transmits a sounding reference signal and a terminal identifier to a plurality of base stations covering itself.
  • each of the plurality of base stations respectively calculates corresponding signal characteristics according to the sounding reference signal, and the signal characteristics include at least a base station identifier, a signal power, and a signal of the base station. Transmission time.
  • Each base station sends its corresponding signal feature and terminal identifier to the positioning server.
  • the positioning server receives the signal feature and the terminal identifier sent by each base station, and combines each received signal feature into a signal feature set, and obtains corresponding location information from the corresponding relationship between the signal feature set and the location information according to the signal feature set, and then Sending the location information to the terminal according to the terminal identifier.
  • the mapping relationship between the signal feature set and the location information is first stored in the positioning server by the following operation: the technician divides the wireless coverage area into several equal-sized regions, and determines each region. Corresponding location information, and then for each zone, the technician personally comes to the zone with the measurement terminal, in which the probe reference signal is sent by the measurement terminal to a plurality of base stations covering the measurement terminal. Each of the plurality of base stations respectively acquires respective corresponding signal characteristics according to the received sounding reference signals. Each base station transmits its corresponding signal feature to the positioning server.
  • the positioning server receives the signal feature sent by each base station, and each received signal feature is formed into a signal feature set corresponding to the region, and the signal feature set corresponding to the region and the location information corresponding to the region are stored in the signal feature set and location. In the correspondence of information. For its Each of his areas can store the corresponding relationship between the signal feature set and the location information corresponding to each of the other areas in the location server according to the above operation.
  • the signal power included in the signal characteristics is related to the transmit power of the terminal.
  • the measurement power of the measurement terminal and the terminal to be located are different. Therefore, the signal characteristics corresponding to the sounding reference signal sent by the terminal to be located are different from the signal characteristics of the sounding reference signal sent by the measurement terminal.
  • the signal characteristics corresponding to the signal are used to obtain the position information, resulting in a large error in the acquired position information.
  • the present invention provides a method and apparatus for acquiring location information.
  • the technical solution is as follows:
  • a first aspect is an apparatus for obtaining location information, the apparatus comprising:
  • a first receiving module configured to receive a signal feature sent by each of the plurality of base stations and an identifier of the terminal to be located, where the signal characteristics of the base station include signal power and an additional feature, where the additional feature includes at least a base station identifier of the base station And signal transmission time;
  • a first determining module configured to determine, according to signal power sent by the multiple base stations, a relative power set, where the relative power set includes a relative power between any two of the multiple base stations;
  • a second determining module configured to determine location information of the terminal corresponding to the identifier of the to-be-located terminal according to the relative power set and the additional features sent by the multiple base stations.
  • the first determining module includes:
  • a first calculating unit configured to calculate a difference between a signal power sent by the first base station and a signal power sent by the second base station, where the first base station is any one of the multiple base stations, and the second The base station is any one of the plurality of base stations except the first base station;
  • a adding unit configured to determine the difference as a relative power between the first base station and the second base station, and add the relative power to a relative power set.
  • the second determining module includes:
  • a first acquiring unit configured to acquire, according to the relative power set and the additional features sent by the multiple base stations, a positioning array corresponding to each relative power included in the relative power set, to form a positioning array set;
  • a determining unit configured to determine location information of the terminal corresponding to the identifier of the to-be-located terminal from the corresponding relationship between the positioning array set and the location information according to the positioning array set.
  • the first acquiring unit includes:
  • Determining a subunit configured to determine two base stations corresponding to the first relative power, where the first relative power is any relative power included in the relative power set;
  • a first acquiring subunit configured to acquire, from the additional features sent by the multiple base stations, additional features sent by the two base stations;
  • Forming a subunit configured to form the first relative power and the additional features sent by the two base stations to form a positioning array corresponding to the first relative power.
  • the device further includes:
  • a first acquiring module configured to acquire location information of the measurement terminal
  • a second receiving module configured to receive a signal feature sent by a plurality of base stations, where the signal feature includes a signal power and an additional feature, where the additional feature includes at least a base station identifier and a signal transmission time;
  • a second acquiring module configured to acquire, according to a signal feature sent by the multiple base stations, a positioning array set corresponding to the measurement terminal;
  • a storage module configured to store the location array set and the location information of the measurement terminal in a correspondence between the location array set and the location information.
  • the second acquiring module includes:
  • a second calculating unit configured to calculate, according to signal power sent by the multiple base stations, relative power between any two of the multiple base stations to form a relative power set
  • a second acquiring unit configured to acquire, according to the relative power set and the additional features sent by the multiple base stations, a positioning array corresponding to each relative power included in the relative power set, and form a corresponding to the measurement terminal Locate the array collection.
  • the additional feature further includes a signal to noise ratio
  • the first determining module includes:
  • a screening unit configured to select a valid base station from the plurality of base stations according to a signal to noise ratio included in an additional feature sent by each of the plurality of base stations;
  • a third calculating unit configured to calculate a relative power between any two effective base stations in the effective base station according to the signal power sent by the effective base station, to form a relative power set.
  • the screening unit includes:
  • a comparison subunit configured to compare a signal to noise ratio sent by each of the plurality of base stations with a preset threshold
  • the first screening subunit is configured to filter a base station with a signal to noise ratio greater than the preset threshold as a valid base station.
  • the screening unit includes:
  • a sorting subunit configured to sort the signal to noise ratios sent by each of the plurality of base stations in a preset order
  • a second acquiring subunit configured to obtain a maximum preset number of signal to noise ratios from each of the sorted signal to noise ratios
  • a second screening subunit configured to select, from the plurality of base stations, the base station corresponding to the acquired signal to noise ratio as a valid base station.
  • a second aspect is a method for obtaining location information, the method comprising:
  • the signal characteristics of the base station include signal power and additional features, the additional features including at least a base station identifier and a signal transmission time of the base station;
  • the determining a relative power set according to the signal power sent by the multiple base stations includes:
  • the first base station is any one of the plurality of base stations
  • the second base station is any one of the plurality of base stations except the first base station
  • the difference is determined as a relative power between the first base station and the second base station, and the relative power is added to a relative power set.
  • the determining, according to the relative power set and the additional feature sent by the multiple base stations, the terminal corresponding to the identifier of the to-be-located terminal Location information including:
  • the positioning array corresponding to each relative power included in the relative power set includes:
  • the method before the receiving the signal feature sent by the multiple base stations and the identifier of the terminal to be located, the method further includes:
  • Signal features transmitted by a plurality of base stations including signal power and additional features, the additional features including at least a base station identity and a signal transmission time;
  • the additional feature further includes a signal to noise ratio
  • Determining a relative power set according to the signal power sent by the multiple base stations including:
  • the signal-to-noise ratio included in the additional feature sent by each of the multiple base stations Extracting valid base stations from the plurality of base stations including:
  • a base station with a signal to noise ratio greater than the preset threshold is selected as a valid base station.
  • the signal-to-noise ratio included in the additional feature sent by each of the multiple base stations Extracting valid base stations from the plurality of base stations including:
  • a third aspect is an apparatus for obtaining location information, the apparatus comprising:
  • a signal feature sent by each of a plurality of base stations and an identifier of a terminal to be located are received, and a signal feature of the base station includes a signal power and an additional feature, where the additional feature includes at least a base station identifier and a signal of the base station.
  • the location information of the terminal to be located is obtained according to the relative power set and the additional features sent by the multiple base stations, so that the relative power is used to obtain the location information, thereby avoiding different terminal transmit powers.
  • the impact is greatly reduced by the error in the acquired position information.
  • FIG. 1 is a schematic structural diagram of an apparatus for acquiring location information according to Embodiment 1 of the present invention
  • FIG. 2 is a flowchart of a method for acquiring location information according to Embodiment 2 of the present invention
  • 3-1 is a flowchart of a method for acquiring location information according to Embodiment 3 of the present invention.
  • FIG. 4 is a schematic structural diagram of an apparatus for acquiring location information according to Embodiment 4 of the present invention.
  • an embodiment of the present invention provides an apparatus for acquiring location information, including:
  • the first receiving module 101 is configured to receive a signal feature sent by each of the plurality of base stations and an identifier of the terminal to be located, where the signal characteristics of the base station include signal power and an additional feature, where the additional feature includes at least a base station identifier of the base station and Signal transmission time;
  • the first determining module 102 is configured to determine a relative power set according to signal power sent by multiple base stations, where the relative power set includes relative power between any two base stations of the multiple base stations;
  • the second determining module 103 is configured to determine location information of the terminal corresponding to the identifier of the to-be-located terminal according to the relative power set and the additional features sent by the multiple base stations.
  • the terminal When the user needs to use the location service through the terminal, the terminal is the terminal to be located.
  • the to-be-located terminal sends the identifier of the to-be-located terminal and the sounding reference signal to a plurality of base stations in the area where the terminal to be located is located, and the to-be-located terminal acquires the transmission time of transmitting the sounding reference signal, and sends the transmission time to the plurality of base stations.
  • Each of the plurality of base stations receives the identity and detection of the to-be-located terminal sent by the terminal to be located. And the reference signal and the sending time, acquiring the signal feature according to the sounding reference signal and the sending time, and sending the identifier of the terminal to be located and the acquired signal feature to the positioning server;
  • the signal feature includes a signal power and an additional feature of the base station receiving the sounding reference signal, the additional feature including at least a base station identifier, a signal transmission time, and a signal to noise ratio of the base station.
  • the signal to noise ratio is the ratio of the power of the normal signal received by the base station to the power of the noise signal. Generally, the larger the signal-to-noise ratio, the less noise is mixed in the signal, and the higher the quality of the signal.
  • the base station receives an identifier, a sounding reference signal, and a sending time of the to-be-located terminal sent by the terminal to be located. Based on the sounding reference signal, a signal power and a signal to noise ratio of the sounding reference signal are calculated. Obtaining a receiving time for receiving the sounding reference signal, calculating a time difference between the receiving time and the sending time, and using the time difference as a signal transmission time of the sounding reference signal.
  • the base station identity of the base station, the signal transmission time, and the calculated signal to noise ratio are combined to form additional features.
  • the calculated signal power and the additional features are combined to form signal characteristics corresponding to the base station.
  • the base station may acquire the signal feature according to the foregoing operation, and send the acquired signal feature and the identifier of the terminal to be located to the positioning server.
  • the first receiving module 101 receives the signal features sent by the multiple base stations and the identifier of the terminal to be located.
  • the first determining module 102 includes:
  • a first calculating unit configured to calculate a difference between a signal power sent by the first base station and a signal power sent by the second base station, where the first base station is any one of the multiple base stations, and the second base station is a plurality of base stations Any base station other than the first base station;
  • a adding unit configured to determine a difference value as a relative power between the first base station and the second base station, and add the relative power to the relative power set.
  • the first determining module 102 filters the effective base stations from the plurality of base stations according to the signal characteristics sent by the plurality of base stations.
  • the effective base station is a base station whose signal to noise ratio meets a predetermined condition.
  • the predetermined condition may be that the base station whose signal to noise ratio is greater than the preset threshold is determined to be a valid base station, or the predetermined condition is that the preset number of base stations having the largest signal to noise ratio are determined as effective base stations.
  • the first determining module 102 acquires the terminal to be located according to the signal feature sent by the effective base station. Corresponding relative power set;
  • the first determining module 102 arbitrarily selects two base stations from the determined effective base stations, and combines the selected two base stations into a base station combination, thus obtaining multiple base station combinations.
  • the signal powers transmitted by the two base stations and the base station identifiers of the two base stations are respectively obtained from the signal features transmitted by the two base stations included in the base station combination. Calculating a difference between the signal powers of the two base stations, using the calculated difference as the relative power between the two base stations, and combining the relative power and the base station identifiers of the two base stations to include the element of the relative power.
  • the base station can be combined with the base station to acquire an element including the relative power between the two base stations included in each of the other base station combinations according to the above operation.
  • the obtained elements including each relative power form a relative power set corresponding to the terminal to be located.
  • the second determining module 103 includes:
  • a first acquiring unit configured to acquire, according to the relative power set and the additional features sent by the multiple base stations, a positioning array corresponding to each relative power included in the relative power set, to form a positioning array set;
  • a determining unit configured to determine location information of the terminal corresponding to the identifier of the to-be-located terminal from the corresponding relationship between the positioning array set and the location information according to the positioning array set.
  • the first obtaining unit respectively acquires a positioning array corresponding to each relative power included in the relative power set according to the relative power set and the additional features sent by the multiple base stations, and forms a positioning array set corresponding to the terminal to be located;
  • the first acquiring unit acquires an element from the relative power set, obtains relative power and two base station identifiers from the element, and determines two base stations corresponding to the two base station identifiers as two base stations corresponding to the relative power. .
  • additional features transmitted from the plurality of base stations additional features transmitted by the two base stations are separately acquired.
  • the relative power and additional features transmitted by the two base stations are grouped into a positioning array containing the relative power.
  • the positioning array containing the relative power included in each of the other elements may be separately obtained from the element according to the above operation.
  • Each obtained positioning array is composed of a positioning array set corresponding to the terminal to be located.
  • the determining unit determines location information corresponding to the terminal to be located according to the positioning array set corresponding to the terminal to be located, and sends the location information to the terminal to be located.
  • the determining unit determines, from the stored correspondence between the set of positioning arrays and the location information, each positioning array set included in the corresponding relationship, and respectively calculates a positioning array set corresponding to the terminal to be located and each obtained positioning array set.
  • the first obtaining unit includes:
  • Determining a subunit configured to determine two base stations corresponding to the first relative power, where the first relative power is any relative power included in the relative power set;
  • a first acquiring subunit configured to acquire, from the additional features sent by the multiple base stations, additional features sent by the two base stations;
  • the device further includes:
  • a first acquiring module configured to acquire location information of the measurement terminal
  • a second receiving module configured to receive a signal feature sent by multiple base stations, where the signal feature includes signal power and an additional feature, where the additional feature includes at least a base station identifier and a signal transmission time;
  • a second acquiring module configured to acquire, according to a signal feature sent by multiple base stations, a positioning array set corresponding to the measurement terminal;
  • a storage module configured to store the location array set and the location information of the measurement terminal in a correspondence between the location array set and the location information.
  • the technician Before the user provides the location service, the technician divides the wireless coverage area into several equal-sized areas, and determines the location information corresponding to each area. Then, for each area, the technician personally goes to the area with the measurement terminal to perform positioning measurement, in which the measurement information is transmitted by the measurement terminal, the sounding reference signal and the transmission time of the sounding reference signal are sent to cover the measurement. Multiple base stations of the terminal.
  • the wireless coverage area is a signal coverage area of all base stations.
  • the position information corresponding to each area may be the longitude and latitude of the center point or any vertex of each area, or the position information corresponding to each area may be the longitude range and the latitude range covered by each area.
  • the measuring terminal is generally a high-precision professional measuring device.
  • the location information, the sounding reference signal, and the sounding reference may be transmitted along with the region according to the foregoing operation.
  • the transmission time of the signal is given to a plurality of base stations covering the measurement terminal.
  • Each of the plurality of base stations respectively receives location information and a sounding reference signal sent by the measurement terminal. And a sending time, acquiring a signal characteristic according to the sounding reference signal and the sending time, and transmitting the position information and the acquired signal feature to the positioning server;
  • the signal characteristic includes a signal power and an additional feature of the base station receiving the sounding reference signal, the additional feature including at least a base station identifier and a signal transmission time.
  • the signal transmission time is the time it takes for the signal to be transmitted from the terminal to the base station.
  • the base station For each of the plurality of base stations covering the measurement terminal, the base station receives the location information, the sounding reference signal, and the transmission time transmitted by the measurement terminal. And calculating a signal power of the sounding reference signal according to the sounding reference signal. Obtaining a receiving time for receiving the sounding reference signal, calculating a time difference between the receiving time and the sending time, and using the time difference as a signal transmission time of the sounding reference signal.
  • the base station identifier of the base station and the signal transmission time form an additional feature, and the additional feature and the calculated signal power constitute a signal feature corresponding to the base station.
  • the signal feature and the received location information are sent to the location server.
  • the base station may acquire the signal feature according to the foregoing operation, and send the signal feature and the location information to the positioning server.
  • the method for specifically calculating the signal power of the sounding reference signal is a prior art, and details are not described herein again.
  • the first obtaining module then acquires location information of the measurement terminal from the plurality of base stations.
  • the second receiving module receives signal features and location information sent by multiple base stations.
  • the second obtaining module includes:
  • a second calculating unit configured to calculate, according to signal power sent by the multiple base stations, relative power between any two base stations in the multiple base stations to form a relative power set
  • a second acquiring unit configured to acquire, according to the relative power set and the additional features sent by the multiple base stations, a positioning array corresponding to each relative power included in the relative power set, and form a positioning array set corresponding to the measurement terminal.
  • the second computing unit acquires a relative power set corresponding to the measurement terminal according to the signal characteristics sent by the multiple base stations.
  • At least one element is included in the relative power set.
  • the element includes the relative power between the two base stations and the base station identity of the two base stations.
  • the second calculating unit randomly selects two base stations from the plurality of base stations, and combines the selected two base stations into a base station combination, thus obtaining a plurality of base station combinations.
  • the signal powers transmitted by the two base stations and the base station identifiers of the two base stations are respectively obtained from the signal features transmitted by the two base stations included in the base station combination.
  • Calculate the signal power of the two base stations The difference between the rates, the calculated difference is taken as the relative power between the two base stations, and the relative power and the base station identifiers of the two base stations are composed of elements including the relative power.
  • the base station can be combined with the base station to acquire an element including the relative power between the two base stations included in each of the other base station combinations according to the above operation.
  • the resulting elements containing each relative power constitute a relative power set corresponding to the measurement terminal.
  • the second obtaining unit acquires an element from the relative power set, obtains relative power and two base station identifiers from the element, and determines two base stations corresponding to the two base station identifiers as two base stations corresponding to the relative power.
  • additional features transmitted from the plurality of base stations additional features transmitted by the two base stations are separately acquired.
  • the relative power and additional features transmitted by the two base stations are grouped into a positioning array containing the relative power.
  • the positioning array containing the relative power included in each of the other elements may be separately obtained from the element according to the above operation.
  • Each obtained positioning array is composed of a positioning array corresponding to the measurement terminal.
  • the storage module stores the location array set corresponding to the measurement terminal and the location information of the measurement terminal in the correspondence between the location array set and the location information.
  • the additional feature further includes a signal to noise ratio
  • the first determining module 102 includes:
  • a screening unit configured to filter out a valid base station from a plurality of base stations according to a signal to noise ratio included in an additional feature sent by each of the plurality of base stations;
  • a third calculating unit configured to calculate a relative power between any two effective base stations in the effective base station according to the signal power sent by the effective base station, to form a relative power set.
  • the screening unit includes:
  • a comparison subunit configured to compare a signal to noise ratio sent by each of the plurality of base stations with a preset threshold
  • the first screening sub-unit is configured to filter a base station with a signal to noise ratio greater than a preset threshold as a valid base station.
  • the positioning server receives the signal features sent by the multiple base stations and the identifier of the terminal to be located.
  • a signal to noise ratio transmitted by each of the plurality of base stations is obtained from signal features transmitted by the plurality of base stations.
  • the signal to noise ratios sent by each of the plurality of base stations are compared with preset thresholds, and the base station with the signal to noise ratio greater than the preset threshold is selected as the effective base station.
  • the screening unit includes:
  • a sorting subunit configured to sort the signal to noise ratios sent by each of the plurality of base stations in a preset order
  • a second acquiring subunit configured to obtain a maximum preset number of signal to noise ratios from each of the sorted signal to noise ratios
  • a second screening subunit configured to select, from the plurality of base stations, the base station corresponding to the acquired signal to noise ratio as the effective base station.
  • the positioning server receives the signal features sent by the multiple base stations and the identifier of the terminal to be located.
  • a signal to noise ratio transmitted by each of the plurality of base stations is obtained from signal features transmitted by the plurality of base stations.
  • the signal to noise ratios transmitted by each of the plurality of base stations are sorted in a predetermined order. The largest preset number of signal to noise ratios are obtained from each of the sorted signal to noise ratios.
  • the base station corresponding to the acquired signal to noise ratio is selected from a plurality of base stations as an effective base station.
  • the preset order may be sorted from large to small or from small to large.
  • the ordering is performed in descending order, and then a predetermined number of signal to noise ratios are selected starting from the first signal to noise ratio after sorting.
  • a signal feature sent by each of a plurality of base stations and an identifier of a terminal to be located are received, and a signal feature of the base station includes a signal power and an additional feature, where the additional feature includes at least a base station identifier and a signal of the base station.
  • the location information of the terminal to be located is obtained according to the relative power set and the additional features sent by the multiple base stations, so that the relative power is used to obtain the location information, thereby avoiding different terminal transmit powers.
  • the impact is greatly reduced by the error in the acquired position information.
  • an embodiment of the present invention provides a method for acquiring location information, including:
  • Step 201 Receive a signal feature sent by each base station of the multiple base stations and an identifier of the terminal to be located.
  • the signal feature of the base station includes signal power and an additional feature, where the additional feature includes at least a base station identifier and a signal transmission time of the base station.
  • Step 202 Determine a relative power set according to signal power sent by multiple base stations, where the relative power set includes relative power between any two base stations of the multiple base stations.
  • Step 203 Determine location information of the terminal corresponding to the identifier of the to-be-located terminal according to the relative power set and the additional features sent by the multiple base stations.
  • determining the relative power set according to the signal power sent by the multiple base stations including:
  • the difference is determined as the relative power between the first base station and the second base station, and the relative power is added to the relative power set.
  • determining the location information of the terminal corresponding to the identifier of the to-be-located terminal according to the relative power set and the additional features sent by the multiple base stations including:
  • the position information of the terminal corresponding to the identifier of the terminal to be located is determined from the corresponding relationship between the set of the positioning array and the location information according to the set of the positioning array.
  • the positioning array corresponding to each relative power included in the relative power set is respectively obtained according to the relative power set and the additional features sent by the multiple base stations, including:
  • the first relative power and the additional features sent by the two base stations form a positioning array corresponding to the first relative power.
  • the method before receiving the signal feature sent by the multiple base stations and the identifier of the terminal to be located, the method further includes:
  • Signal features transmitted by a plurality of base stations including signal power and additional features, the additional features including at least a base station identity and a signal transmission time;
  • the location array set and the location information of the measurement terminal are stored in a correspondence between the location array set and the location information.
  • the acquiring the set of positioning arrays corresponding to the measurement terminal according to the signal characteristics sent by the multiple base stations comprises:
  • the additional feature further comprises a signal to noise ratio
  • Determining a relative power set according to signal powers sent by multiple base stations including:
  • the effective base station is selected from the plurality of base stations according to a signal to noise ratio included in the additional feature sent by each of the plurality of base stations, including:
  • a base station with a signal to noise ratio greater than a preset threshold is selected as a valid base station.
  • the effective base station is selected from the plurality of base stations according to a signal to noise ratio included in the additional feature sent by each of the plurality of base stations, including:
  • the base station corresponding to the acquired signal to noise ratio is selected from a plurality of base stations as an effective base station.
  • a signal feature sent by each of a plurality of base stations and an identifier of a terminal to be located are received, and a signal feature of the base station includes a signal power and an additional feature, where the additional feature includes at least a base station identifier and a signal of the base station.
  • the location information of the terminal to be located is obtained according to the relative power set and the additional features sent by the multiple base stations, so that the relative power is used to obtain the location information, thereby avoiding different terminal transmit powers.
  • the impact is greatly reduced by the error in the acquired position information.
  • the embodiment of the invention provides a method for acquiring location information.
  • location services are widely used.
  • the location server can obtain the location information of the terminal corresponding to the user by using the method provided by the embodiment of the present invention, and send the obtained location information to the user.
  • Terminal The method specifically includes:
  • Step 301 The measurement terminal sends the location information, the sounding reference signal, and the sending time of the sounding reference signal to a plurality of base stations covering the measurement terminal.
  • the technician Before the user provides the location service, the technician divides the wireless coverage area into several equal-sized areas, and determines the location information corresponding to each area. Then, for each area, the technician personally goes to the area with the measurement terminal to perform positioning measurement, in which the measurement information is transmitted by the measurement terminal, the sounding reference signal and the transmission time of the sounding reference signal are sent to cover the measurement. Multiple base stations of the terminal.
  • the wireless coverage area is a signal coverage area of all base stations.
  • the position information corresponding to each area may be the longitude and latitude of the center point or any vertex of each area, or the position information corresponding to each area may be the longitude range and the latitude range covered by each area.
  • the measuring terminal is generally a high-precision professional measuring device.
  • the location information, the sounding reference signal, and the sounding reference may be transmitted along with the region according to the foregoing operation.
  • the transmission time of the signal is given to a plurality of base stations covering the measurement terminal.
  • the base station of the coverage area 1 includes the base stations 1, 2, and 3, and the location information of the area 1 is (45, 50), and the transmission time is t0. Then, the measurement terminal transmits the location information (45, 50), the sounding reference signal SRS1, and the transmission time t0 of the transmission sounding reference signal SRS1 to the base stations 1, 2, and 3 covering the measurement terminal.
  • Step 302 Each of the multiple base stations respectively receives location information, a sounding reference signal, and a transmission time sent by the measurement terminal, acquires a signal feature according to the sounding reference signal and the transmission time, and acquires the location information and the acquired signal feature. Sent to the location server;
  • the signal characteristic includes a signal power and an additional feature of the base station receiving the sounding reference signal, the additional feature including at least a base station identifier and a signal transmission time.
  • the signal transmission time is the time it takes for the signal to be transmitted from the terminal to the base station.
  • the step is specifically: for each base station of the plurality of base stations covering the measurement terminal, the base station receives the location information, the sounding reference signal, and the transmission time sent by the measurement terminal. And calculating a signal power of the sounding reference signal according to the sounding reference signal. Obtaining a receiving time for receiving the sounding reference signal, calculating a time difference between the receiving time and the sending time, and using the time difference as a signal of the sounding reference signal Transmission time.
  • the base station identifier of the base station and the signal transmission time form an additional feature, and the additional feature and the calculated signal power constitute a signal feature corresponding to the base station.
  • the signal feature and the received location information are sent to the location server.
  • the base station may acquire the signal feature according to the foregoing operation, and send the signal feature and the location information to the positioning server.
  • the method for specifically calculating the signal power of the sounding reference signal is a prior art, and details are not described herein again.
  • the base station 1 receives the location information (45, 50) transmitted by the measurement terminal, the sounding reference signal SRS1, and the transmission time t0. Based on the sounding reference signal SRS1, the signal power of the sounding reference signal SRS1 is calculated as p1. Obtaining the reception time t1 of receiving the sounding reference signal SRS1, calculating a time difference (t1-t0) between the reception time t1 and the transmission time t0, and using the time difference (t1-t0) as the signal transmission time of the sounding reference signal SRS1.
  • the base station identity eNB1 of the base station 1 and the signal transmission time (t1-t0) constitute an additional feature F1
  • the additional feature F1 and the calculated signal power p1 constitute the signal feature S1 corresponding to the base station 1.
  • the signal feature S1 and the received location information (45, 50) are sent to the location server.
  • the signal feature S2 acquired by the base station 2 includes the signal power p2 and the additional feature F2
  • the additional feature F2 includes the base station identity eNB2 of the base station 2 and the signal transmission time (t2-t0)
  • the location information (45, 50) is sent to the location server.
  • the signal feature S3 acquired by the base station 3 includes a signal power p3 and an additional feature F3.
  • the additional feature F3 includes a base station identity eNB3 of the base station 3 and a signal transmission time (t3-t0), and the base station 3 sets the signal feature S3 and the received location information (45). , 50) sent to the location server.
  • Table 1 the signal characteristics corresponding to each base station are indicated by Table 1 below.
  • the location server may obtain the measurement terminal by the operations of the following steps 303 and 304.
  • Corresponding positioning array collection includes at least one positioning array.
  • the positioning array includes the relative power between the two base stations and the additional features transmitted by the two base stations.
  • Step 303 The positioning server receives the signal feature and the location information sent by each of the multiple base stations, and determines the relative power set corresponding to the measurement terminal according to the signal characteristics sent by the multiple base stations.
  • At least one element is included in the relative power set.
  • the element includes the relative power between the two base stations and the base station identity of the two base stations.
  • the positioning server receives signal features and location information sent by multiple base stations.
  • Two base stations are arbitrarily selected from the plurality of base stations, and the selected two base stations are combined into a base station, thus obtaining a plurality of base station combinations.
  • the signal powers transmitted by the two base stations and the base station identifiers of the two base stations are respectively obtained from the signal features transmitted by the two base stations included in the base station combination. Calculating a difference between the signal powers of the two base stations, using the calculated difference as the relative power between the two base stations, and combining the relative power and the base station identifiers of the two base stations to include the element of the relative power.
  • the base station can be combined with the base station to acquire an element including the relative power between the two base stations included in each of the other base station combinations according to the above operation.
  • the resulting elements containing each relative power constitute a relative power set corresponding to the measurement terminal.
  • the positioning server receives the signal feature S1 and the location information (45, 50) transmitted by the base station 1, receives the signal feature S2 and the location information (45, 50) transmitted by the base station 2, and the signal feature S3 and the location information transmitted by the receiving base station 3. (45, 50).
  • Two base stations are randomly selected from the base stations 1, 2 and 3. Assuming that the base stations 1 and 2 are selected, the selected base stations 1 and 2 are combined into a base station combination (1, 2), and the base station combination (1, 3) and 2, 3).
  • the signal powers p1 and p2 transmitted by the base stations 1 and 2, and the base station identity eNB1 of the base station 1 and the base station identity eNB2 of the base station 2 are respectively acquired from the signal features S1 and S2 transmitted by the base stations 1 and 2 included in the base station combination (1, 2). .
  • the base station identity eNB1 of the base station 1 and the base station identity eNB2 of the base station 2 constitute an element [(p1-p2), eNB1, eNB2] containing relative power (p1-p2).
  • the elements [(p1-p3), eNB1, eNB3] including the relative power (p1-p3) between the base stations 1 and 3 are also calculated according to the above operation, and the relative power between the base stations 2 and 3 is included (p2-p3).
  • the obtained elements [(p1-p2), eNB1, eNB2], [(p1-p3), eNB1, eNB3] and [(p2-p3), eNB2, eNB3] constitute a relative power set U1 corresponding to the measurement terminal.
  • Step 304 The positioning server divides according to the relative power set and the additional features sent by the multiple base stations. Do not acquire a positioning array corresponding to each relative power included in the relative power set, and form a positioning array set corresponding to the measurement terminal;
  • the positioning server acquires an element from the relative power set, obtains relative power and two base station identifiers from the element, and determines two base stations corresponding to the two base station identifiers as two base stations corresponding to the relative power.
  • additional features transmitted from the plurality of base stations additional features transmitted by the two base stations are separately acquired.
  • the relative power and additional features transmitted by the two base stations are grouped into a positioning array containing the relative power.
  • the positioning array containing the relative power included in each of the other elements may be separately obtained from the element according to the above operation.
  • Each obtained positioning array is composed of a positioning array corresponding to the measurement terminal.
  • the positioning server acquires an element from the relative power set U1, assuming that the acquired element is [(p1-p2), eNB1, eNB2], and obtains relative power from the element [(p1-p2), eNB1, eNB2] ( P1-p2) and two base station identifiers eNB1 and eNB2, and base stations 1 and 2 corresponding to the base station identifiers eNB1 and eNB2, respectively, are determined as two base stations corresponding to relative power (p1-p2). From the additional features F1, F2 and F3 transmitted by the base stations 1, 2 and 3, additional features F1 and F2 transmitted by the base stations 1 and 2, respectively, are acquired.
  • the relative power (p1-p2) and the additional features F1 and F2 transmitted by the base stations 1 and 2 constitute a positioning array [(p1-p2), F1, F2] containing the relative power (p1-p2). Also, according to the above operation, a positioning array [(p1-p3), F1, F3] including relative power (p1-p3) and a positioning array containing relative power (p2-p3) [(p2-p3), F2, F3 are obtained. ].
  • the obtained positioning arrays [(p1-p2), F1, F2], [(p1-p3), F1, F3] and [(p2-p3), F2, F3] are composed of the positioning array set V1 corresponding to the measurement terminal.
  • the positioning array may further include signal power and the like transmitted by two base stations corresponding to the relative power in the positioning array.
  • the corresponding relationship between the positioning array set corresponding to the measurement terminal and the location information is stored by the operation of the following step 305, so as to complete the corresponding location information.
  • Position measurement of the area is obtained by the operations of the foregoing steps 303 and 304.
  • Step 305 The location server stores the location array set corresponding to the measurement terminal and the location information of the measurement terminal in a corresponding relationship between the location array set and the location information.
  • the location server stores the location array set V1 corresponding to the measurement terminal and the location information (45, 50) of the measurement terminal in the correspondence relationship between the location array set and the location information as shown in Table 2.
  • the technician performs the positioning measurement on each area with the measurement terminal in person in each area according to the operations of the above steps 301-305.
  • the positioning service can be provided to the user only after the positioning measurement of each area is completed.
  • the location information of the terminal to be located can be obtained by the operations of the following steps 306-311.
  • Step 306 The to-be-located terminal sends the identifier of the to-be-located terminal, the sounding reference signal, and the sending time of sending the sounding reference signal to multiple base stations covering the terminal to be located.
  • the terminal When the user needs to use the location service through the terminal, the terminal is the terminal to be located.
  • the terminal to be located sends the identifier of the terminal to be located and the sounding reference signal to a plurality of base stations in the area where the terminal to be located is located.
  • the terminal to be located acquires the transmission time of transmitting the sounding reference signal, and sends the sending time to the plurality of base stations.
  • a base station covering a terminal to be located includes base stations 1, 2, 3, and 4.
  • the terminal to be located sends the identifier phone1 and the sounding reference signal SRS2 of the terminal to be located to the base stations 1, 2, 3 and 4 covering the terminal to be located, and the terminal to be positioned acquires the transmission time t4 of transmitting the sounding reference signal SRS2, and the transmission time t4 Sent to base stations 1, 2, 3 and 4.
  • Step 307 Each of the multiple base stations receives an identifier, a sounding reference signal, and a sending time of the to-be-located terminal sent by the to-be-located terminal, acquires a signal feature according to the sounding reference signal and the sending time, and identifies the terminal to be located. And the acquired signal characteristics are sent to the positioning server;
  • the signal characteristic includes a signal power and an additional feature of the base station receiving the sounding reference signal, the additional feature including at least a base station identifier, a signal transmission time, and a signal to noise ratio.
  • the signal to noise ratio is the ratio of the power of the normal signal received by the base station to the power of the noise signal. Generally, the larger the signal-to-noise ratio, the less noise is mixed in the signal, and the higher the quality of the signal.
  • the step is specifically: for each of the plurality of base stations, the base station receives the identifier, the sounding reference signal, and the sending time of the terminal to be located sent by the terminal to be located. Based on the sounding reference signal, a signal power and a signal to noise ratio of the sounding reference signal are calculated. Obtaining a receiving time for receiving the sounding reference signal, calculating a time difference between the receiving time and the sending time, and using the time difference as a signal transmission time of the sounding reference signal. Base station identity of the base station, the signal transmission time, and the calculated signal to noise ratio group Become an additional feature. The calculated signal power and the additional features are combined to form signal characteristics corresponding to the base station.
  • the base station may acquire the signal feature according to the foregoing operation, and send the acquired signal feature and the identifier of the terminal to be located to the positioning server.
  • the base station 1 receives the identifier phone1, the sounding reference signal SRS2, and the transmission time t4 of the terminal to be located transmitted by the terminal to be located. Based on the sounding reference signal SRS2, the signal power p4 and the signal-to-noise ratio SNR1 of the sounding reference signal SRS2 are calculated. The reception time t5 at which the sounding reference signal SRS2 is received is acquired, and the time difference (t5-t4) between the reception time t5 and the transmission time t4 is calculated, and the time difference (t5-t4) is used as the signal transmission time of the sounding reference signal SRS2.
  • the base station identity eNB1 of the base station 1 and the signal transmission time (t5-t4) and the calculated signal-to-noise ratio SNR1 constitute an additional feature F4.
  • the calculated signal power p4 and the additional feature F4 form the signal characteristic S4 corresponding to the base station 1.
  • the signal feature S4 and the identifier phone1 of the terminal to be located are sent to the location server.
  • the signal feature S5 acquired by the base station 2 includes the signal power p5 and the additional feature F5.
  • the additional feature F5 includes the base station identity eNB2 of the base station 2, the signal transmission time (t6-t4) and the signal to noise ratio SNR2, and the base station 2 will The signal feature S5 and the identifier phone1 of the terminal to be located are sent to the location server.
  • the signal feature S6 acquired by the base station 3 includes signal power p6 and an additional feature F6.
  • the additional feature F6 includes the base station identity eNB3 of the base station 3, the signal transmission time (t7-t4) and the signal to noise ratio SNR3, and the base station 3 sets the signal feature S6 and to be determined.
  • the identity of the bit terminal, phone1 is sent to the location server.
  • the signal feature S7 acquired by the base station 4 comprises a signal power p7 and an additional feature F7.
  • the additional feature F7 includes a base station identity eNB4 of the base station 4, a signal transmission time (t8-t4) and a signal to noise ratio SNR4, and the base station 4 sets the signal characteristic S7 and to be determined.
  • the identity of the bit terminal, phone1, is sent to the location server.
  • the signal characteristics corresponding to each base station are indicated by Table 3 below.
  • the signal-to-noise ratio of the sounding reference signal received by some base stations is small, and the quality of the received signal is very poor.
  • the following steps 308 can be adopted.
  • the operation determines an effective base station with a good quality of the received signal from among a plurality of base stations.
  • Step 308 The positioning server receives the signal feature sent by the multiple base stations and the identifier of the terminal to be located, and selects the effective base station from the plurality of base stations according to the signal characteristics sent by the multiple base stations;
  • the effective base station is a base station whose signal to noise ratio meets a predetermined condition.
  • the predetermined condition may be that the base station with the signal to noise ratio greater than the preset threshold is selected as the effective base station, or the predetermined condition is that the preset number of base stations with the highest signal to noise ratio are selected as the effective base station.
  • the step can be implemented in the following first and second manners according to different predetermined conditions, specifically:
  • the positioning server receives the signal characteristics sent by the plurality of base stations and the identifier of the terminal to be located.
  • a signal to noise ratio transmitted by each of the plurality of base stations is obtained from signal features transmitted by the plurality of base stations.
  • the signal to noise ratios sent by each of the plurality of base stations are compared with preset thresholds, and the base station with the signal to noise ratio greater than the preset threshold is selected as the effective base station.
  • the positioning server receives the signal feature S4 sent by the base station 1 and the identifier phone1 of the terminal to be located, the signal feature S5 sent by the receiving base station 2 and the identifier phone1 of the terminal to be located, the signal feature S6 sent by the receiving base station 3, and the identifier of the terminal to be located.
  • the signal-to-noise ratios SNR1, SNR2, SNR3, and SNR4 transmitted by the base stations 1, 2, 3, and 4 are acquired from the signal characteristics S4, S5, S6, and S7 transmitted from the base stations 1, 2, 3, and 4, respectively.
  • the signal to noise ratios transmitted by the base stations 1, 2, 3, and 4 are respectively compared with preset thresholds. It is assumed that the signal to noise ratios of the base stations 1, 2 and 3 are both greater than a preset threshold, and the signal to noise ratio of the base station 4 is less than a preset threshold.
  • the base stations 1, 2 and 3 whose signal to noise ratio is greater than a preset threshold are selected as effective base stations.
  • the positioning server receives the signal characteristics sent by the plurality of base stations and the identifier of the terminal to be located.
  • a signal to noise ratio transmitted by each of the plurality of base stations is obtained from signal features transmitted by the plurality of base stations.
  • the signal to noise ratios transmitted by each of the plurality of base stations are sorted in a predetermined order. The largest preset number of signal to noise ratios are obtained from each of the sorted signal to noise ratios.
  • the base station corresponding to the acquired signal to noise ratio is selected from a plurality of base stations as an effective base station.
  • the preset order may be sorted from large to small or from small to large.
  • Sorting is performed in descending order, and then a preset number of signal to noise ratios are selected starting from the first signal to noise ratio after sorting.
  • the positioning server receives the signal feature S4 sent by the base station 1 and the identifier phone1 of the terminal to be located, receives the signal feature S5 sent by the base station 2 and the phone1 of the terminal to be located, and receives the signal feature S6 sent by the base station 3 and the phone1 of the terminal to be located. And receiving the signal feature S7 sent by the base station 4 and the identifier phone1 of the terminal to be located.
  • the signal-to-noise ratios SNR1, SNR2, SNR3, and SNR4 transmitted by the base stations 1, 2, 3, and 4 are acquired from the signal characteristics S4, S5, S6, and S7 transmitted from the base stations 1, 2, 3, and 4, respectively.
  • the signal-to-noise ratios transmitted by the base stations 1, 2, 3, and 4 are sorted in descending order, assuming that the order of the sorted signal-to-noise ratios is SNR2, SNR3, SNR1, and SNR4.
  • the three signal-to-noise ratios are obtained starting from the first signal-to-noise ratio SNR2 after sorting, that is, the signal-to-noise ratios SNR2, SNR3, and SNR1 are obtained.
  • the base stations 2, 3, and 1 respectively corresponding to the acquired signal-to-noise ratios SNR2, SNR3, and SNR1 are selected from the plurality of base stations as effective base stations.
  • the positioning array set corresponding to the terminal to be located can be obtained by the operations of the following steps 309 and 310.
  • Step 309 The positioning server acquires a relative power set corresponding to the terminal to be located according to the signal feature sent by the effective base station.
  • the positioning server arbitrarily selects two base stations from the determined effective base stations, and combines the selected two base stations into a base station combination, thus obtaining a plurality of base station combinations.
  • the signal powers transmitted by the two base stations and the base station identifiers of the two base stations are respectively obtained from the signal features transmitted by the two base stations included in the base station combination. Calculating a difference between the signal powers of the two base stations, using the calculated difference as the relative power between the two base stations, and combining the relative power and the base station identifiers of the two base stations to include the element of the relative power.
  • the base station can be combined with the base station to acquire an element including the relative power between the two base stations included in each of the other base station combinations according to the above operation.
  • the obtained elements including each relative power form a relative power set corresponding to the terminal to be located.
  • the positioning server arbitrarily selects two base stations from the determined effective base stations 1, 2 and 3, assuming that the base stations 1 and 2 are selected, and the selected base stations 1 and 2 are combined into a base station combination (1, 2), and the base station combination can also be obtained. (1,3) and (2,3).
  • the signal powers p4 and p5 transmitted by the base stations 1 and 2 are acquired from the signal features S4 and S5 transmitted by the base stations 1 and 2 included in the base station combination (1, 2), respectively, and the base station identifiers of the base station identification eNB1 and the base station 2 of the base station 1 are acquired. eNB2.
  • the base station identity eNB2 identifying the eNB1 and the base station 2 constitutes an element [(p4-p5), eNB1, eNB2] containing relative power (p4-p5).
  • the element [[p4-p6), eNB1, eNB3] having the relative power between base stations 1 and 3 (p4-p6) is also obtained according to the above operation, and the relative power between the base stations 2 and 3 is included (p5- Element of p6) [(p5-p6), eNB2, eNB3].
  • the obtained elements [(p4-p5), eNB1, eNB2], [(p4-p6), eNB1, eNB3] and [(p5-p6), eNB2, eNB3] constitute a relative power set U2 corresponding to the terminal to be located.
  • Step 310 The positioning server obtains a positioning array corresponding to each relative power included in the relative power set according to the relative power set and the additional features sent by the multiple base stations, and forms a positioning array set corresponding to the terminal to be located.
  • the positioning server acquires an element from the relative power set, obtains relative power and two base station identifiers from the element, and determines two base stations corresponding to the two base station identifiers as two base stations corresponding to the relative power.
  • additional features transmitted from the plurality of base stations additional features transmitted by the two base stations are separately acquired.
  • the relative power and additional features transmitted by the two base stations are grouped into a positioning array containing the relative power.
  • the positioning array containing the relative power included in each of the other elements may be separately obtained from the element according to the above operation.
  • Each obtained positioning array is composed of a positioning array set corresponding to the terminal to be located.
  • the positioning server acquires an element from the relative power set U2, assuming that the acquired element is [(p4-p5), eNB1, eNB2], and obtains relative power from the element [(p4-p5), eNB1, eNB2] ( P4-p5) and the base station identifiers eNB1 and eNB2, and base stations 1 and 2 corresponding to the base station identifiers eNB1 and eNB2, respectively, are determined as two base stations corresponding to the relative power (p4-p5). Additional features F4 and F5 transmitted by base stations 1 and 2 are acquired from additional features F4, F5, F6 and F7 transmitted by base stations 1, 2, 3 and 4, respectively.
  • the relative power (p4-p5) and the additional features F4 and F5 transmitted by the base stations 1 and 2 constitute a positioning array [(p4-p5), F4, F5] containing the relative power (p4-p5). Also obtain the positioning array [(p4-p6), F4, F6] containing the relative power (p4-p6) and the positioning array containing the relative power (p5-p6) [(p5-p6), F5, F6) as described above. ].
  • the obtained positioning arrays [(p4-p5), F4, F5], [(p4-p6), F4, F6] and [(p5-p6), F5, F6] are grouped into the positioning array set V2 corresponding to the terminal to be located. .
  • the location information of the terminal to be located is obtained by the operation of the following step 311, and the bit is obtained. The information is sent to the terminal to be located.
  • Step 311 The location server determines the location information corresponding to the terminal to be located according to the location array set corresponding to the terminal to be located, and sends the location information to the terminal to be located.
  • the positioning server obtains each positioning array set included in the corresponding relationship from the stored relationship between the set of positioning arrays and the location information, and respectively calculates a positioning array set corresponding to the terminal to be located and each obtained positioning array set. The similarity between them determines the set of positioned arrays with the highest similarity. And determining, according to the positioning array set, the corresponding location information from the correspondence between the positioning array set and the location information, and determining the location information as the location information corresponding to the terminal to be located. Sending the location information to the terminal to be located according to the identifier of the terminal to be located.
  • the positioning server obtains the positioning array sets V1 and V3 included in the corresponding relationship from the stored correspondence between the positioning array set and the position information as shown in Table 1, and respectively calculates the positioning array set V2 corresponding to the terminal to be located and
  • the similarity between the obtained set of positioning arrays V1 and V3 is assumed to be 0.95 with respect to V1, and the similarity with V3 is 0.5.
  • the positioning array set V1 the corresponding position information (45, 50) is determined from the correspondence relationship between the positioning array set and the position information as shown in Table 1, and the position information (45, 50) is determined as the terminal to be positioned.
  • Location information The location information (45, 50) is sent to the terminal to be located according to the identifier phone1 of the terminal to be located.
  • a signal feature sent by each of a plurality of base stations and an identifier of a terminal to be located are received, and a signal feature of the base station includes a signal power and an additional feature, where the additional feature includes at least a base station identifier and a signal of the base station.
  • the location information of the terminal to be located is obtained according to the relative power set and the additional features sent by the multiple base stations, so that the relative power is used to obtain the location information, thereby avoiding different terminal transmit powers.
  • the impact is greatly reduced by the error in the acquired position information.
  • an embodiment of the present invention provides an apparatus for acquiring location information, where the apparatus includes a memory 401 and a processor 402, and is configured to perform a method for acquiring location information, including:
  • the base station receives a signal feature sent by each of the plurality of base stations and an identifier of the terminal to be located, the base station
  • the signal characteristics include signal power and additional features, the additional features including at least a base station identity and a signal transmission time of the base station;
  • determining the relative power set according to the signal power sent by the multiple base stations including:
  • the difference is determined as the relative power between the first base station and the second base station, and the relative power is added to the relative power set.
  • determining the location information of the terminal corresponding to the identifier of the to-be-located terminal according to the relative power set and the additional features sent by the multiple base stations including:
  • the position information of the terminal corresponding to the identifier of the terminal to be located is determined from the corresponding relationship between the set of the positioning array and the location information according to the set of the positioning array.
  • the positioning array corresponding to each relative power included in the relative power set is respectively obtained according to the relative power set and the additional features sent by the multiple base stations, including:
  • the first relative power and the additional features sent by the two base stations form a positioning array corresponding to the first relative power.
  • the method before receiving the signal feature sent by the multiple base stations and the identifier of the terminal to be located, the method further includes:
  • Signal features transmitted by a plurality of base stations including signal power and additional features, the additional features including at least a base station identity and a signal transmission time;
  • the location array set and the location information of the measurement terminal are stored in a correspondence between the location array set and the location information.
  • the acquiring the set of positioning arrays corresponding to the measurement terminal according to the signal characteristics sent by the multiple base stations comprises:
  • the additional feature further comprises a signal to noise ratio
  • Determining a relative power set according to signal powers sent by multiple base stations including:
  • the effective base station is selected from the plurality of base stations according to a signal to noise ratio included in the additional feature sent by each of the plurality of base stations, including:
  • a base station with a signal to noise ratio greater than a preset threshold is selected as a valid base station.
  • the effective base station is selected from the plurality of base stations according to a signal to noise ratio included in the additional feature sent by each of the plurality of base stations, including:
  • the base station corresponding to the acquired signal to noise ratio is selected from a plurality of base stations as an effective base station.
  • a signal feature sent by each of a plurality of base stations and an identifier of a terminal to be located are received, and a signal feature of the base station includes a signal power and an additional feature, where the additional feature includes at least a base station identifier and a signal of the base station.
  • the relative power set is obtained according to the signal power transmitted by the multiple base stations
  • the location information of the terminal to be located is obtained according to the relative power set and the additional features sent by the multiple base stations, so that the relative power is used to obtain the location information, thereby avoiding different terminal transmit powers.
  • the impact big The error of the acquired position information is greatly reduced.
  • a person skilled in the art may understand that all or part of the steps of implementing the above embodiments may be completed by hardware, or may be instructed by a program to execute related hardware, and the program may be stored in a computer readable storage medium.
  • the storage medium mentioned may be a read only memory, a magnetic disk or an optical disk or the like.

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Abstract

本发明公开了一种获取位置信息的方法及装置，属于移动通信领域。所述方法包括：接收多个基站中的每个基站发送的信号特征和待定位终端的标识，基站的信号特征包括信号功率和附加特征，该附加特征至少包括该基站的基站标识和信号传输时间；根据多个基站发送的信号功率，确定相对功率集合，其中，该相对功率集合包含多个基站中任意两个基站之间的相对功率；根据相对功率集合和多个基站发送的附加特征，确定待定位终端的标识对应的终端的位置信息。所述装置包括：第一接收模块、第一确定模块和第二确定模块。本发明能够减小获取位置信息的误差。

Description

一种获取位置信息的方法及装置 技术领域
本发明涉及移动通信领域，特别涉及一种获取位置信息的方法及装置。
背景技术
随着通信技术的发展，定位服务得到了广泛地使用。当用户请求定位服务时，服务器需要获取用户对应的终端的位置信息，并将获取的位置信息发送给用户对应的终端。例如，路径导航就是一种定位服务，在用户请求进行路径导航时，服务器需要获取用户对应的终端的位置信息，并将获取的位置信息发送给用户对应的终端。
目前，现有技术提供了一种获取位置信息的方法，包括：待定位终端发送探测参考信号和终端标识给覆盖其自身的多个基站。这多个基站中的每个基站接收到终端发送的探测参考信号和终端标识之后，分别根据该探测参考信号计算出各自对应的信号特征，该信号特征至少包括基站的基站标识、信号功率和信号传输时间。每个基站均发送各自对应的信号特征和终端标识给定位服务器。定位服务器接收每个基站发送的信号特征和终端标识，将接收到的每个信号特征组成信号特征集合，根据该信号特征集合从信号特征集合与位置信息的对应关系中获取对应的位置信息，然后根据该终端标识，将该位置信息发送给该终端。
其中，在获取位置信息之前，首先通过如下操作在定位服务器中存储信号特征集合与位置信息的对应关系，具体为：技术人员将无线覆盖区域细分为若干大小相等的区域，并确定每个区域对应的位置信息，然后对于每个区域，技术人员带着测量终端亲自到该区域，在该区域中通过该测量终端发送探测参考信号给覆盖该测量终端的多个基站。这多个基站中的每个基站根据接收到的探测参考信号，分别获取各自对应的信号特征。每个基站将各自对应的信号特征发送给定位服务器。定位服务器接收每个基站发送的信号特征，将接收到的每个信号特征组成该区域对应的信号特征集合，将该区域对应的信号特征集合和该区域对应的位置信息存储在信号特征集合与位置信息的对应关系中。对于其 他每个区域，都可以同该区域按照上述操作在定位服务器中存储其他每个区域对应的信号特征集合与位置信息的对应关系。
在实现本发明的过程中，发明人发现现有技术至少存在以下问题：
信号特征中包括的信号功率与终端的发射功率有关。而测量终端与待定位终端的发射功率不相同，因此待定位终端发送的探测参考信号对应的信号特征与测量终端发送的探测参考信号对应的信号特征差别很大，根据待定位终端发送的探测参考信号对应的信号特征来获取位置信息，导致获取的位置信息的误差很大。
发明内容
为了减小获取位置信息的误差，本发明提供了一种获取位置信息的方法及装置。所述技术方案如下：
第一方面，一种获取位置信息的装置，所述装置包括：
第一接收模块，用于接收多个基站中的每个基站发送的信号特征和待定位终端的标识，基站的信号特征包括信号功率和附加特征，所述附加特征至少包括所述基站的基站标识和信号传输时间；
第一确定模块，用于根据所述多个基站发送的信号功率，确定相对功率集合，其中，所述相对功率集合包含所述多个基站中任意两个基站之间的相对功率；
第二确定模块，用于根据所述相对功率集合和所述多个基站发送的附加特征，确定所述待定位终端的标识对应的终端的位置信息。
结合第一方面，在上述第一方面的第一种可能的实现方式中，所述第一确定模块包括：
第一计算单元，用于计算第一基站发送的信号功率与第二基站发送的信号功率之间的差值，所述第一基站为所述多个基站中的任一基站，所述第二基站为所述多个基站中除所述第一基站外的任一基站；
添加单元，用于将所述差值确定为所述第一基站与所述第二基站之间的相对功率，将所述相对功率添加到相对功率集合中。
结合第一方面，在上述第一方面的第二种可能的实现方式中，所述第二确定模块包括：
第一获取单元，用于根据所述相对功率集合和所述多个基站发送的附加特征，分别获取所述相对功率集合中包括的每个相对功率对应的定位数组，组成定位数组集合；
确定单元，用于根据所述定位数组集合，从定位数组集合与位置信息的对应关系中确定所述待定位终端的标识对应的终端的位置信息。
结合第一方面的第二种可能的实现方式，在上述第一方面的第三种可能的实现方式中，所述第一获取单元包括：
确定子单元，用于确定第一相对功率对应的两个基站，所述第一相对功率为所述相对功率集合中包括的任一相对功率；
第一获取子单元，用于从所述多个基站发送的附加特征中，分别获取所述两个基站发送的附加特征；
组成子单元，用于将所述第一相对功率和所述两个基站发送的附加特征组成所述第一相对功率对应的定位数组。
结合第一方面，在上述第一方面的第四种可能的实现方式中，所述装置还包括：
第一获取模块，用于获取测量终端的位置信息；
第二接收模块，用于接收多个基站发送的信号特征，所述信号特征包括信号功率和附加特征，所述附加特征至少包括基站标识和信号传输时间；
第二获取模块，用于根据所述多个基站发送的信号特征，获取所述测量终端对应的定位数组集合；
存储模块，用于将所述定位数组集合和所述测量终端的位置信息存储在定位数组集合与位置信息的对应关系中。
结合第一方面的第四种可能的实现方式中，在上述第一方面的第五种可能的实现方式中，所述第二获取模块包括：
第二计算单元，用于根据所述多个基站发送的信号功率，计算所述多个基站中任意两个基站之间的相对功率，组成相对功率集合；
第二获取单元，用于根据所述相对功率集合和所述多个基站发送的附加特征，分别获取所述相对功率集合中包括的每个相对功率对应的定位数组，组成所述测量终端对应的定位数组集合。
结合第一方面，在上述第一方面的第六种可能的实现方式中，所述附加特征还包括信噪比；
所述第一确定模块包括：
筛选单元，用于根据所述多个基站中每个基站发送的附加特征中包括的信噪比，从所述多个基站中筛选出有效基站；
第三计算单元，用于根据所述有效基站发送的信号功率，计算所述有效基站中任意两个有效基站之间的相对功率，组成相对功率集合。
结合第一方面的第六种可能的实现方式中，在上述第一方面的第七种可能的实现方式中，所述筛选单元包括：
比较子单元，用于将所述多个基站中每个基站发送的信噪比分别与预设阈值进行比较；
第一筛选子单元，用于筛选出信噪比大于所述预设阈值的基站作为有效基站。
结合第一方面的第六种可能的实现方式中，在上述第一方面的第八种可能的实现方式中，所述筛选单元包括：
排序子单元，用于将所述多个基站中每个基站发送的信噪比按照预设顺序进行排序；
第二获取子单元，用于从所述排序后的每个信噪比中获取最大的预设个数个信噪比；
第二筛选子单元，用于从所述多个基站中筛选出所述获取的信噪比对应的基站作为有效基站。
第二方面，一种获取位置信息的方法，所述方法包括：
接收多个基站中的每个基站发送的信号特征和待定位终端的标识，基站的信号特征包括信号功率和附加特征，所述附加特征至少包括所述基站的基站标识和信号传输时间；
根据所述多个基站发送的信号功率，确定相对功率集合，其中，所述相对功率集合包含所述多个基站中任意两个基站之间的相对功率；
根据所述相对功率集合和所述多个基站发送的附加特征，确定所述待定位终端的标识对应的终端的位置信息。
结合第二方面，在上述第二方面的第一种可能的实现方式中，所述根据所述多个基站发送的信号功率，确定相对功率集合，包括：
计算第一基站发送的信号功率与第二基站发送的信号功率之间的差值，所 述第一基站为所述多个基站中的任一基站，所述第二基站为所述多个基站中除所述第一基站外的任一基站；
将所述差值确定为所述第一基站与所述第二基站之间的相对功率，将所述相对功率添加到相对功率集合中。
结合第二方面，在上述第二方面的第二种可能的实现方式中，所述根据所述相对功率集合和所述多个基站发送的附加特征，确定所述待定位终端的标识对应的终端的位置信息，包括：
根据所述相对功率集合和所述多个基站发送的附加特征，分别获取所述相对功率集合中包括的每个相对功率对应的定位数组，组成定位数组集合；
根据所述定位数组集合，从定位数组集合与位置信息的对应关系中确定所述待定位终端的标识对应的终端的位置信息。
结合第二方面的第二种可能的实现方式中，在上述第二方面的第三种可能的实现方式中，所述根据所述相对功率集合和所述多个基站发送的附加特征，分别获取所述相对功率集合中包括的每个相对功率对应的定位数组，包括：
确定第一相对功率对应的两个基站，所述第一相对功率为所述相对功率集合中包括的任一相对功率；
从所述多个基站发送的附加特征中，分别获取所述两个基站发送的附加特征；
将所述第一相对功率和所述两个基站发送的附加特征组成所述第一相对功率对应的定位数组。
结合第二方面，在上述第二方面的第四种可能的实现方式中，所述接收多个基站发送的信号特征和待定位终端的标识之前，还包括：
获取测量终端的位置信息；
接收多个基站发送的信号特征，所述信号特征包括信号功率和附加特征，所述附加特征至少包括基站标识和信号传输时间；
根据所述多个基站发送的信号特征，获取所述测量终端对应的定位数组集合；
将所述定位数组集合和所述测量终端的位置信息存储在定位数组集合与位置信息的对应关系中。
结合第二方面的第四种可能的实现方式，在上述第二方面的第五种可能的实现方式中，所述根据所述多个基站发送的信号特征，获取所述测量终端对应 的定位数组集合，包括：
根据所述多个基站发送的信号功率，计算所述多个基站中任意两个基站之间的相对功率，组成相对功率集合；
根据所述相对功率集合和所述多个基站发送的附加特征，分别获取所述相对功率集合中包括的每个相对功率对应的定位数组，组成所述测量终端对应的定位数组集合。
结合第二方面，在上述第二方面的第六种可能的实现方式中，所述附加特征还包括信噪比；
所述根据所述多个基站发送的信号功率，确定相对功率集合，包括：
根据所述多个基站中每个基站发送的附加特征中包括的信噪比，从所述多个基站中筛选出有效基站；
根据所述有效基站发送的信号功率，计算所述有效基站中任意两个有效基站之间的相对功率，组成相对功率集合。
结合第二方面的第六种可能的实现方式，在上述第二方面的第七种可能的实现方式中，所述根据所述多个基站中每个基站发送的附加特征中包括的信噪比，从所述多个基站中筛选出有效基站，包括：
将所述多个基站中每个基站发送的信噪比分别与预设阈值进行比较；
筛选出信噪比大于所述预设阈值的基站作为有效基站。
结合第二方面的第六种可能的实现方式，在上述第二方面的第八种可能的实现方式中，所述根据所述多个基站中每个基站发送的附加特征中包括的信噪比，从所述多个基站中筛选出有效基站，包括：
将所述多个基站中每个基站发送的信噪比按照预设顺序进行排序；
从所述排序后的每个信噪比中获取最大的预设个数个信噪比；
从所述多个基站中筛选出所述获取的信噪比对应的基站作为有效基站。
第三方面，一种获取位置信息的装置，所述装置包括：
存储器和处理器，用于执行上述第10至18任一项权利要求所述的方法。
在本发明实施例中，接收多个基站中的每个基站发送的信号特征和待定位终端的标识，基站的信号特征包括信号功率和附加特征，该附加特征至少包括该基站的基站标识和信号传输时间；根据多个基站发送的信号功率，确定相对功率集合，其中，该相对功率集合包含多个基站中任意两个基站之间的相对功 率；根据相对功率集合和多个基站发送的附加特征，确定待定位终端的标识对应的终端的位置信息。由于根据多个基站发送信号功率获取了相对功率集合，根据相对功率集合和多个基站发送的附加特征来获取待定位终端的位置信息，如此使用相对功率来获取位置信息，避免了终端发射功率不同造成的影响，大大减小了获取的位置信息的误差。
附图说明
图1是本发明实施例1提供的一种获取位置信息的装置结构示意图；
图2是本发明实施例2提供的一种获取位置信息的方法流程图；
图3-1是本发明实施例3提供的一种获取位置信息的方法流程图；
图3-2是本发明实施例3提供的一种获取位置信息的方法流程图；
图4是本发明实施例4提供的一种获取位置信息的装置结构示意图。
具体实施方式
为使本发明的目的、技术方案和优点更加清楚，下面将结合附图对本发明实施方式作进一步地详细描述。
实施例1
参见图1，本发明实施例提供了一种获取位置信息的装置，包括：
第一接收模块101，用于接收多个基站中的每个基站发送的信号特征和待定位终端的标识，基站的信号特征包括信号功率和附加特征，该附加特征至少包括该基站的基站标识和信号传输时间；
第一确定模块102，用于根据多个基站发送的信号功率，确定相对功率集合，其中，该相对功率集合包含多个基站中任意两个基站之间的相对功率；
第二确定模块103，用于根据相对功率集合和多个基站发送的附加特征，确定待定位终端的标识对应的终端的位置信息。
其中，当用户需要通过终端使用定位服务时，该终端即为待定位终端。待定位终端发送待定位终端的标识和探测参考信号给覆盖待定位终端所在区域的多个基站，待定位终端获取发送探测参考信号的发送时间，将该发送时间发送给这多个基站。
这多个基站中的每个基站接收待定位终端发送的待定位终端的标识、探测 参考信号和发送时间，根据该探测参考信号和发送时间获取信号特征，并将待定位终端的标识和获取的信号特征发送给定位服务器；
其中，该信号特征包括基站接收该探测参考信号的信号功率和附加特征，该附加特征至少包括该基站的基站标识、信号传输时间和信噪比。信噪比是基站接收的正常信号的功率与噪声信号的功率的比值。一般信噪比越大，表示混在信号中的噪声越少，信号的质量越高。
具体地，对于这多个基站中的每个基站，该基站接收待定位终端发送的待定位终端的标识、探测参考信号和发送时间。根据该探测参考信号，计算该探测参考信号的信号功率和信噪比。获取接收该探测参考信号的接收时间，计算该接收时间与发送时间之间的时间差，将该时间差作为该探测参考信号的信号传输时间。将该基站的基站标识、该信号传输时间和计算的信噪比组成附加特征。将计算的信号功率和该附加特征组成该基站对应的信号特征。将该信号特征和待定位终端的标识发送给定位服务器。对于这多个基站中除该基站以外的其他每个基站，都可以同该基站按照上述操作获取信号特征，并将获取的信号特征和待定位终端的标识发送给定位服务器。
其中，具体计算探测参考信号的信号功率和信噪比的方法为现有技术，在此不再赘述。
然后，第一接收模块101接收这多个基站发送的信号特征和待定位终端的标识。
其中，第一确定模块102包括：
第一计算单元，用于计算第一基站发送的信号功率与第二基站发送的信号功率之间的差值，第一基站为多个基站中的任一基站，第二基站为多个基站中除第一基站外的任一基站；
添加单元，用于将差值确定为第一基站与第二基站之间的相对功率，将所述相对功率添加到相对功率集合中。
优选地，第一确定模块102在计算多个基站中任意两个基站之间的相对功率之前，根据多个基站发送的信号特征，从多个基站中筛选出有效基站。
其中，有效基站为信噪比符合预定条件的基站。预定条件可以为将信噪比大于预设阈值的基站确定为有效基站，或者预定条件为将信噪比最大的预设个数个基站确定为有效基站。
然后，第一确定模块102根据有效基站发送的信号特征，获取待定位终端 对应的相对功率集合；
具体地，第一确定模块102从确定的有效基站中任意选取两个基站，将选取的两个基站组成基站组合，如此得到多个基站组合。对于得到的多个基站组合中的任一基站组合，从该基站组合包括的两个基站发送的信号特征中分别获取这两个基站发送的信号功率以及这两个基站的基站标识。计算这两个基站发送信号功率之间的差值，将计算的差值作为这两个基站之间的相对功率，将该相对功率和这两个基站的基站标识组成包含该相对功率的元素。对于多个基站组合中除该基站组合以外的其他每个基站组合，都可以同该基站组合，按照上述操作来获取包含其他每个基站组合中包括的两个基站之间的相对功率的元素。将得到的包含每个相对功率的元素组成待定位终端对应的相对功率集合。
其中，第二确定模块103包括：
第一获取单元，用于根据相对功率集合和多个基站发送的附加特征，分别获取相对功率集合中包括的每个相对功率对应的定位数组，组成定位数组集合；
确定单元，用于根据定位数组集合，从定位数组集合与位置信息的对应关系中确定待定位终端的标识对应的终端的位置信息。
其中，第一获取单元根据相对功率集合和多个基站发送的附加特征，分别获取相对功率集合中包括的每个相对功率对应的定位数组，组成待定位终端对应的定位数组集合；
具体地，第一获取单元从相对功率集合中获取一个元素，从该元素中获取相对功率和两个基站标识，将这两个基站标识对应的两个基站确定为该相对功率对应的两个基站。从多个基站发送的附加特征中，分别获取这两个基站发送的附加特征。将该相对功率和这两个基站发送的附加特征组成包含该相对功率的定位数组。对于相对功率集合中包括的除该元素以外的其他每个元素，都可以同该元素按照上述操作分别获取包含其他每个元素中包括的相对功率的定位数组。将获取的每个定位数组组成待定位终端对应的定位数组集合。
其中，确定单元根据待定位终端对应的定位数组集合，确定待定位终端对应的位置信息，并将该位置信息发送给待定位终端。
具体地，确定单元从已存储的定位数组集合与位置信息的对应关系中确定该对应关系中包括的每个定位数组集合，分别计算待定位终端对应的定位数组集合与获取的每个定位数组集合之间的相似度，确定相似度最大的定位数组集 合。根据该定位数组集合，从定位数组集合与位置信息的对应关系中确定对应的位置信息，将该位置信息确定为待定位终端对应的位置信息。根据待定位终端的标识，将该位置信息发送给待定位终端。
其中，第一获取单元包括：
确定子单元，用于确定第一相对功率对应的两个基站，第一相对功率为相对功率集合中包括的任一相对功率；
第一获取子单元，用于从多个基站发送的附加特征中，分别获取两个基站发送的附加特征；
组成子单元，用于将第一相对功率和两个基站发送的附加特征组成第一相对功率对应的定位数组。
进一步地，该装置还包括：
第一获取模块，用于获取测量终端的位置信息；
第二接收模块，用于接收多个基站发送的信号特征，该信号特征包括信号功率和附加特征，该附加特征至少包括基站标识和信号传输时间；
第二获取模块，用于根据多个基站发送的信号特征，获取测量终端对应的定位数组集合；
存储模块，用于将定位数组集合和测量终端的位置信息存储在定位数组集合与位置信息的对应关系中。
其中，在为用户提供定位服务之前，技术人员将无线覆盖区域细分为若干大小相等的区域，并确定每个区域对应的位置信息。然后对于每个区域，技术人员带着测量终端亲自到该区域进行定位测量，在该区域中通过测量终端发送该区域的位置信息、探测参考信号和发送该探测参考信号的发送时间给覆盖该测量终端的多个基站。
其中，无线覆盖区域为所有基站的信号覆盖区域。每个区域对应的位置信息可以为每个区域的中心点或任一顶点所在的经度和纬度，或者每个区域对应的位置信息可以为每个区域所覆盖的经度范围和纬度范围。测量终端一般为高精度的专业测量设备。
其中，对于划分的每个区域中除该区域以外的其他每个区域，当测量终端分别位于其他每个区域时，都可以同该区域按照上述操作发送位置信息、探测参考信号和发送该探测参考信号的发送时间给覆盖测量终端的多个基站。
这多个基站中的每个基站分别接收测量终端发送的位置信息、探测参考信 号和发送时间，根据该探测参考信号和该发送时间获取信号特征，并将位置信息和获取的信号特征发送给定位服务器；
其中，该信号特征包括基站接收该探测参考信号的信号功率和附加特征，该附加特征至少包括基站标识和信号传输时间。信号传输时间为信号从终端传输至基站所花费的时间。
对于覆盖测量终端的多个基站中的每个基站，该基站接收测量终端发送的位置信息、探测参考信号和发送时间。根据该探测参考信号，计算该探测参考信号的信号功率。获取接收该探测参考信号的接收时间，计算该接收时间与发送时间之间的时间差，将该时间差作为该探测参考信号的信号传输时间。将该基站的基站标识与该信号传输时间组成附加特征，将该附加特征与计算的信号功率组成该基站对应的信号特征。将该信号特征和接收的位置信息发送给定位服务器。对于这多个基站中除该基站以外的其他每个基站，都可以同该基站按照上述操作获取信号特征，并将信号特征和位置信息发送给定位服务器。
其中，具体计算探测参考信号的信号功率的方法为现有技术，在此不再赘述。
然后第一获取模块从这多个基站中获取测量终端的位置信息。第二接收模块接收多个基站发送的信号特征和位置信息。
其中，第二获取模块包括：
第二计算单元，用于根据多个基站发送的信号功率，计算多个基站中任意两个基站之间的相对功率，组成相对功率集合；
第二获取单元，用于根据相对功率集合和多个基站发送的附加特征，分别获取相对功率集合中包括的每个相对功率对应的定位数组，组成测量终端对应的定位数组集合。
其中，第二计算单元根据多个基站发送的信号特征，获取测量终端对应的相对功率集合。
其中，相对功率集合中包括至少一个元素。元素中包括两个基站之间的相对功率和这两个基站的基站标识。
具体地，第二计算单元从这多个基站中任意选取两个基站，将选取的两个基站组成基站组合，如此得到多个基站组合。对于得到的多个基站组合中的任一基站组合，从该基站组合包括的两个基站发送的信号特征中分别获取这两个基站发送的信号功率以及这两个基站的基站标识。计算这两个基站发送信号功 率之间的差值，将计算的差值作为这两个基站之间的相对功率，将该相对功率和这两个基站的基站标识组成包含该相对功率的元素。对于多个基站组合中除该基站组合以外的其他每个基站组合，都可以同该基站组合，按照上述操作来获取包含其他每个基站组合中包括的两个基站之间的相对功率的元素。将得到的包含每个相对功率的元素组成测量终端对应的相对功率集合。
其中，第二获取单元从相对功率集合中获取一个元素，从该元素中获取相对功率和两个基站标识，将这两个基站标识对应的两个基站确定为该相对功率对应的两个基站。从多个基站发送的附加特征中，分别获取这两个基站发送的附加特征。将该相对功率和这两个基站发送的附加特征组成包含该相对功率的定位数组。对于相对功率集合中包括的除该元素以外的其他每个元素，都可以同该元素按照上述操作分别获取包含其他每个元素中包括的相对功率的定位数组。将获取的每个定位数组组成测量终端对应的定位数组集合。
然后，存储模块将测量终端对应的定位数组集合和测量终端的位置信息存储在定位数组集合与位置信息的对应关系中。
其中，该附加特征还包括信噪比；
第一确定模块102包括：
筛选单元，用于根据多个基站中每个基站发送的附加特征中包括的信噪比，从多个基站中筛选出有效基站；
第三计算单元，用于根据有效基站发送的信号功率，计算有效基站中任意两个有效基站之间的相对功率，组成相对功率集合。
其中，筛选单元包括：
比较子单元，用于将多个基站中每个基站发送的信噪比分别与预设阈值进行比较；
第一筛选子单元，用于筛选出信噪比大于预设阈值的基站作为有效基站。
其中，定位服务器接收多个基站发送的信号特征和待定位终端的标识。从多个基站发送的信号特征中分别获取这多个基站中每个基站发送的信噪比。将这多个基站中每个基站发送的信噪比分别与预设阈值进行比较，筛选出信噪比大于预设阈值的基站作为有效基站。
其中，筛选单元包括：
排序子单元，用于将多个基站中每个基站发送的信噪比按照预设顺序进行排序；
第二获取子单元，用于从排序后的每个信噪比中获取最大的预设个数个信噪比；
第二筛选子单元，用于从所述多个基站中筛选出获取的信噪比对应的基站作为有效基站。
其中，定位服务器接收多个基站发送的信号特征和待定位终端的标识。从多个基站发送的信号特征中分别获取这多个基站中每个基站发送的信噪比。将这多个基站中每个基站发送的信噪比按照预设顺序进行排序。从排序后的每个信噪比中获取最大的预设个数个信噪比。从多个基站中筛选出获取的信噪比对应的基站作为为有效基站。
其中，预设顺序可以为从大到小进行排序或从小到大进行排序。优选地，按照从大到小的顺序进行排序，然后从排序后的第一个信噪比开始选择预设个数个信噪比。
在本发明实施例中，接收多个基站中的每个基站发送的信号特征和待定位终端的标识，基站的信号特征包括信号功率和附加特征，该附加特征至少包括该基站的基站标识和信号传输时间；根据多个基站发送的信号功率，确定相对功率集合，其中，该相对功率集合包含多个基站中任意两个基站之间的相对功率；根据相对功率集合和多个基站发送的附加特征，确定待定位终端的标识对应的终端的位置信息。由于根据多个基站发送信号功率获取了相对功率集合，根据相对功率集合和多个基站发送的附加特征来获取待定位终端的位置信息，如此使用相对功率来获取位置信息，避免了终端发射功率不同造成的影响，大大减小了获取的位置信息的误差。
实施例2
参见图2，本发明实施例提供了一种获取位置信息的方法，包括：
步骤201：接收多个基站中的每个基站发送的信号特征和待定位终端的标识，基站的信号特征包括信号功率和附加特征，该附加特征至少包括该基站的基站标识和信号传输时间；
步骤202：根据多个基站发送的信号功率，确定相对功率集合，其中，该相对功率集合包含多个基站中任意两个基站之间的相对功率；
步骤203：根据相对功率集合和多个基站发送的附加特征，确定待定位终端的标识对应的终端的位置信息。
优选地，根据多个基站发送的信号功率，确定相对功率集合，包括：
计算第一基站发送的信号功率与第二基站发送的信号功率之间的差值，第一基站为多个基站中的任一基站，第二基站为多个基站中除第一基站外的任一基站；
将差值确定为第一基站与第二基站之间的相对功率，将该相对功率添加到相对功率集合中。
优选地，根据相对功率集合和多个基站发送的附加特征，确定待定位终端的标识对应的终端的位置信息，包括：
根据相对功率集合和多个基站发送的附加特征，分别获取相对功率集合中包括的每个相对功率对应的定位数组，组成定位数组集合；
根据定位数组集合，从定位数组集合与位置信息的对应关系中确定待定位终端的标识对应的终端的位置信息。
优选地，根据相对功率集合和多个基站发送的附加特征，分别获取相对功率集合中包括的每个相对功率对应的定位数组，包括：
确定第一相对功率对应的两个基站，第一相对功率为相对功率集合中包括的任一相对功率；
从多个基站发送的附加特征中，分别获取两个基站发送的附加特征；
将第一相对功率和两个基站发送的附加特征组成第一相对功率对应的定位数组。
进一步地，接收多个基站发送的信号特征和待定位终端的标识之前，还包括：
获取测量终端的位置信息；
接收多个基站发送的信号特征，该信号特征包括信号功率和附加特征，该附加特征至少包括基站标识和信号传输时间；
根据多个基站发送的信号特征，获取测量终端对应的定位数组集合；
将定位数组集合和测量终端的位置信息存储在定位数组集合与位置信息的对应关系中。
优选地，根据多个基站发送的信号特征，获取测量终端对应的定位数组集合，包括：
根据多个基站发送的信号功率，计算多个基站中任意两个基站之间的相对功率，组成相对功率集合；
根据相对功率集合和多个基站发送的附加特征，分别获取相对功率集合中包括的每个相对功率对应的定位数组，组成测量终端对应的定位数组集合。
优选地，该附加特征还包括信噪比；
根据多个基站发送的信号功率，确定相对功率集合，包括：
根据多个基站中每个基站发送的附加特征中包括的信噪比，从多个基站中筛选出有效基站；
根据有效基站发送的信号功率，计算有效基站中任意两个有效基站之间的相对功率，组成相对功率集合。
优选地，根据多个基站中每个基站发送的附加特征中包括的信噪比，从多个基站中筛选出有效基站，包括：
将多个基站中每个基站发送的信噪比分别与预设阈值进行比较；
筛选出信噪比大于预设阈值的基站作为有效基站。
优选地，根据多个基站中每个基站发送的附加特征中包括的信噪比，从多个基站中筛选出有效基站，包括：
将多个基站中每个基站发送的信噪比按照预设顺序进行排序；
从排序后的每个信噪比中获取最大的预设个数个信噪比；
从多个基站中筛选出获取的信噪比对应的基站作为为有效基站。
在本发明实施例中，接收多个基站中的每个基站发送的信号特征和待定位终端的标识，基站的信号特征包括信号功率和附加特征，该附加特征至少包括该基站的基站标识和信号传输时间；根据多个基站发送的信号功率，确定相对功率集合，其中，该相对功率集合包含多个基站中任意两个基站之间的相对功率；根据相对功率集合和多个基站发送的附加特征，确定待定位终端的标识对应的终端的位置信息。由于根据多个基站发送信号功率获取了相对功率集合，根据相对功率集合和多个基站发送的附加特征来获取待定位终端的位置信息，如此使用相对功率来获取位置信息，避免了终端发射功率不同造成的影响，大大减小了获取的位置信息的误差。
实施例3
本发明实施例提供了一种获取位置信息的方法。目前，定位服务得到了广泛地使用。当用户请求定位服务时，定位服务器可以通过本发明实施例提供的方法来获取用户对应的终端的位置信息，并将获取的位置信息发送给用户对应 的终端。该方法具体包括：
其中，在为用户提供定位服务之前，需要通过如下步骤301-305的操作来进行定位测量。参见图3-1，具体包括：
步骤301：测量终端发送位置信息、探测参考信号和发送该探测参考信号的发送时间给覆盖该测量终端的多个基站；
其中，在为用户提供定位服务之前，技术人员将无线覆盖区域细分为若干大小相等的区域，并确定每个区域对应的位置信息。然后对于每个区域，技术人员带着测量终端亲自到该区域进行定位测量，在该区域中通过测量终端发送该区域的位置信息、探测参考信号和发送该探测参考信号的发送时间给覆盖该测量终端的多个基站。
其中，无线覆盖区域为所有基站的信号覆盖区域。每个区域对应的位置信息可以为每个区域的中心点或任一顶点所在的经度和纬度，或者每个区域对应的位置信息可以为每个区域所覆盖的经度范围和纬度范围。测量终端一般为高精度的专业测量设备。
其中，对于划分的每个区域中除该区域以外的其他每个区域，当测量终端分别位于其他每个区域时，都可以同该区域按照上述操作发送位置信息、探测参考信号和发送该探测参考信号的发送时间给覆盖测量终端的多个基站。
例如，假设技术人员带着测量终端亲自到区域1进行定位测量，覆盖区域1的基站包括基站1、2和3，且区域1的位置信息为(45,50)，发送时间为t0。则测量终端发送位置信息(45,50)、探测参考信号SRS1和发送探测参考信号SRS1的发送时间t0给覆盖该测量终端的基站1、2和3。
步骤302：这多个基站中的每个基站分别接收测量终端发送的位置信息、探测参考信号和发送时间，根据该探测参考信号和该发送时间获取信号特征，并将位置信息和获取的信号特征发送给定位服务器；
其中，该信号特征包括基站接收该探测参考信号的信号功率和附加特征，该附加特征至少包括基站标识和信号传输时间。信号传输时间为信号从终端传输至基站所花费的时间。
本步骤具体为，对于覆盖测量终端的多个基站中的每个基站，该基站接收测量终端发送的位置信息、探测参考信号和发送时间。根据该探测参考信号，计算该探测参考信号的信号功率。获取接收该探测参考信号的接收时间，计算该接收时间与发送时间之间的时间差，将该时间差作为该探测参考信号的信号 传输时间。将该基站的基站标识与该信号传输时间组成附加特征，将该附加特征与计算的信号功率组成该基站对应的信号特征。将该信号特征和接收的位置信息发送给定位服务器。对于这多个基站中除该基站以外的其他每个基站，都可以同该基站按照上述操作获取信号特征，并将信号特征和位置信息发送给定位服务器。
其中，具体计算探测参考信号的信号功率的方法为现有技术，在此不再赘述。
例如，基站1接收测量终端发送的位置信息(45,50)、探测参考信号SRS1和发送时间t0。根据探测参考信号SRS1，计算探测参考信号SRS1的信号功率为p1。获取接收该探测参考信号SRS1的接收时间t1，计算该接收时间t1与发送时间t0之间的时间差(t1-t0)，将该时间差(t1-t0)作为该探测参考信号SRS1的信号传输时间。将基站1的基站标识eNB1与该信号传输时间(t1-t0)组成附加特征F1，将该附加特征F1与计算的信号功率p1组成基站1对应的信号特征S1。将该信号特征S1和接收的位置信息(45,50)发送给定位服务器。
同样按照上述操作，基站2获取的信号特征S2包括信号功率p2和附加特征F2，附加特征F2中包括基站2的基站标识eNB2和信号传输时间(t2-t0)，基站2将信号特征S2和接收的位置信息(45,50)发送给定位服务器。基站3获取的信号特征S3包括信号功率p3和附加特征F3，附加特征F3中包括基站3的基站标识eNB3和信号传输时间(t3-t0)，基站3将信号特征S3和接收的位置信息(45,50)发送给定位服务器。为了表述地更清楚，下面通过表1来表示每个基站对应的信号特征。
表1
Figure PCTCN2014090312-appb-000001
其中，通过上述步骤301和302的操作将位置信息和信号特征发送给定位服务器之后，定位服务器可以通过如下步骤303和304的操作来获取测量终端 对应的定位数组集合。其中，定位数组集合中包括至少一个定位数组。定位数组中包括两个基站之间的相对功率和这两个基站发送的附加特征。
步骤303：定位服务器接收多个基站中的每个基站发送的信号特征和位置信息，根据多个基站发送的信号特征，确定测量终端对应的相对功率集合；
其中，相对功率集合中包括至少一个元素。元素中包括两个基站之间的相对功率和这两个基站的基站标识。
本步骤具体为，定位服务器接收多个基站发送的信号特征和位置信息。从这多个基站中任意选取两个基站，将选取的两个基站组成基站组合，如此得到多个基站组合。对于得到的多个基站组合中的任一基站组合，从该基站组合包括的两个基站发送的信号特征中分别获取这两个基站发送的信号功率以及这两个基站的基站标识。计算这两个基站发送信号功率之间的差值，将计算的差值作为这两个基站之间的相对功率，将该相对功率和这两个基站的基站标识组成包含该相对功率的元素。对于多个基站组合中除该基站组合以外的其他每个基站组合，都可以同该基站组合，按照上述操作来获取包含其他每个基站组合中包括的两个基站之间的相对功率的元素。将得到的包含每个相对功率的元素组成测量终端对应的相对功率集合。
例如，定位服务器接收基站1发送的信号特征S1和位置信息(45,50)，接收基站2发送的信号特征S2和位置信息(45,50)，以及接收基站3发送的信号特征S3和位置信息(45,50)。从基站1、2和3中任意选取两个基站，假设选取了基站1和2，将选取的基站1和2组成基站组合(1,2)，同样可以得到基站组合(1,3)和(2,3)。从基站组合(1,2)包括的基站1和2发送的信号特征S1和S2中分别获取基站1和2发送的信号功率p1和p2，以及基站1的基站标识eNB1和基站2的基站标识eNB2。计算基站1和2发送的信号功率p1和p2之间的差值(p1-p2)，将计算的差值(p1-p2)作为基站1和2之间的相对功率，将该相对功率(p1-p2)、基站1的基站标识eNB1和基站2的基站标识eNB2组成包含相对功率(p1-p2)的元素[(p1-p2)，eNB1，eNB2]。同样按照上述操作计算得到包含基站1和3之间的相对功率(p1-p3)的元素[(p1-p3)，eNB1，eNB3]，以及包含基站2和3之间的相对功率(p2-p3)的元素[(p2-p3)，eNB2，eNB3]。将得到的元素[(p1-p2)，eNB1，eNB2]、[(p1-p3)，eNB1，eNB3]和[(p2-p3)，eNB2，eNB3]组成测量终端对应的相对功率集合U1。
步骤304：定位服务器根据相对功率集合和多个基站发送的附加特征，分 别获取相对功率集合中包括的每个相对功率对应的定位数组，组成测量终端对应的定位数组集合；
具体地，定位服务器从相对功率集合中获取一个元素，从该元素中获取相对功率和两个基站标识，将这两个基站标识对应的两个基站确定为该相对功率对应的两个基站。从多个基站发送的附加特征中，分别获取这两个基站发送的附加特征。将该相对功率和这两个基站发送的附加特征组成包含该相对功率的定位数组。对于相对功率集合中包括的除该元素以外的其他每个元素，都可以同该元素按照上述操作分别获取包含其他每个元素中包括的相对功率的定位数组。将获取的每个定位数组组成测量终端对应的定位数组集合。
例如，定位服务器从相对功率集合U1中获取一个元素，假设获取的元素为[(p1-p2)，eNB1，eNB2]，从该元素[(p1-p2)，eNB1，eNB2]中获取相对功率(p1-p2)以及两个基站标识eNB1和eNB2，将基站标识eNB1和eNB2分别对应的基站1和2确定为相对功率(p1-p2)对应的两个基站。从基站1、2和3发送的附加特征F1、F2和F3中，分别获取基站1和2发送的附加特征F1和F2。将该相对功率(p1-p2)以及基站1和2发送的附加特征F1和F2组成包含该相对功率(p1-p2)的定位数组[(p1-p2)，F1，F2]。同样按照上述操作获得包含相对功率(p1-p3)的定位数组[(p1-p3)，F1，F3]，以及包含相对功率(p2-p3)的定位数组[(p2-p3)，F2，F3]。将获取的定位数组[(p1-p2)，F1，F2]、[(p1-p3)，F1，F3]和[(p2-p3)，F2，F3]组成测量终端对应的定位数组集合V1。
进一步地，定位数组中还可以包括该定位数组中相对功率对应的两个基站发送的信号功率等。
其中，通过上述步骤303和304的操作获取到测量终端对应的定位数组集合之后，通过如下步骤305的操作来存储测量终端对应的定位数组集合与位置信息的对应关系，以完成对该位置信息对应的区域的定位测量。
步骤305：定位服务器将测量终端对应的定位数组集合和测量终端的位置信息存储在定位数组集合与位置信息的对应关系中；
例如，定位服务器将测量终端对应的定位数组集合V1和测量终端的位置信息(45,50)存储在如表2所示的定位数组集合与位置信息的对应关系中。
表2
定位数组集合 位置信息
V1 (45,50)
V3 (60,75)
…… ……
其中，对于无线覆盖区域划分的每个区域，技术人员都带着测量终端亲自到每个区域中按照上述步骤301-305的操作来对每个区域进行定位测量。只有当每个区域的定位测量都完成之后，才可以为用户提供定位服务。当用户对应的待定位终端需要定位服务时，参见图3-2，可以通过如下步骤306-311的操作来获取待定位终端的位置信息。
步骤306：待定位终端发送待定位终端的标识、探测参考信号和发送该探测参考信号的发送时间给覆盖待定位终端的多个基站；
其中，当用户需要通过终端使用定位服务时，该终端即为待定位的终端。待定位的终端发送待定位终端的标识和探测参考信号给覆盖待定位终端所在区域的多个基站，待定位终端获取发送探测参考信号的发送时间，将该发送时间发送给这多个基站。
例如，假设覆盖待定位终端的基站包括基站1、2、3和4。待定位的终端发送待定位终端的标识phone1和探测参考信号SRS2给覆盖待定位终端的基站1、2、3和4，待定位终端获取发送探测参考信号SRS2的发送时间t4，将该发送时间t4发送给基站1、2、3和4。
步骤307：这多个基站中的每个基站接收待定位终端发送的待定位终端的标识、探测参考信号和发送时间，根据该探测参考信号和发送时间获取信号特征，并将待定位终端的标识和获取的信号特征发送给定位服务器；
其中，该信号特征包括基站接收该探测参考信号的信号功率和附加特征，该附加特征至少包括基站标识、信号传输时间和信噪比。信噪比是基站接收的正常信号的功率与噪声信号的功率的比值。一般信噪比越大，表示混在信号中的噪声越少，信号的质量越高。
本步骤具体为，对于这多个基站中的每个基站，该基站接收待定位终端发送的待定位终端的标识、探测参考信号和发送时间。根据该探测参考信号，计算该探测参考信号的信号功率和信噪比。获取接收该探测参考信号的接收时间，计算该接收时间与发送时间之间的时间差，将该时间差作为该探测参考信号的信号传输时间。将该基站的基站标识、该信号传输时间和计算的信噪比组 成附加特征。将计算的信号功率和该附加特征组成该基站对应的信号特征。将该信号特征和待定位终端的标识发送给定位服务器。对于这多个基站中除该基站以外的其他每个基站，都可以同该基站按照上述操作获取信号特征，并将获取的信号特征和待定位终端的标识发送给定位服务器。
其中，具体计算探测参考信号的信号功率和信噪比的方法为现有技术，在此不再赘述。
例如，基站1接收待定位终端发送的待定位终端的标识phone1、探测参考信号SRS2和发送时间t4。根据该探测参考信号SRS2，计算该探测参考信号SRS2的信号功率p4和信噪比SNR1。获取接收该探测参考信号SRS2的接收时间t5，计算该接收时间t5与发送时间t4之间的时间差(t5-t4)，将该时间差(t5-t4)作为该探测参考信号SRS2的信号传输时间。将基站1的基站标识eNB1、该信号传输时间(t5-t4)和计算的信噪比SNR1组成附加特征F4。将计算的信号功率p4和该附加特征F4组成基站1对应的信号特征S4。将该信号特征S4和待定位终端的标识phone1发送给定位服务器。
同样按照上述操作，基站2获取的信号特征S5包括信号功率p5和附加特征F5，附加特征F5中包括基站2的基站标识eNB2、信号传输时间(t6-t4)和信噪比SNR2，基站2将信号特征S5和待定位终端的标识phone1发送给定位服务器。基站3获取的信号特征S6包括信号功率p6和附加特征F6，附加特征F6中包括基站3的基站标识eNB3、信号传输时间(t7-t4)和信噪比SNR3，基站3将信号特征S6和待定位终端的标识phone1发送给定位服务器。基站4获取的信号特征S7包括信号功率p7和附加特征F7，附加特征F7中包括基站4的基站标识eNB4、信号传输时间(t8-t4)和信噪比SNR4，基站4将信号特征S7和待定位终端的标识phone1发送给定位服务器。为了表述地更清楚，下面通过表3来表示每个基站对应的信号特征。
表3
Figure PCTCN2014090312-appb-000002
Figure PCTCN2014090312-appb-000003
其中，由于信号在传输过程中会受到环境的干扰，因此导致一些基站接收到的探测参考信号的信噪比很小，接收信号的质量非常差，为了提高定位的准确性，可以通过如下步骤308的操作从多个基站中确定出接收信号的质量较好的有效基站。
步骤308：定位服务器接收多个基站发送的信号特征和待定位终端的标识，根据多个基站发送的信号特征，从多个基站中筛选出有效基站；
其中，有效基站为信噪比符合预定条件的基站。预定条件可以为筛选出信噪比大于预设阈值的基站作为有效基站，或者预定条件为筛选出信噪比最大的预设个数个基站作为有效基站。
其中，根据预定条件的不同，本步骤可以通过如下第一和第二两种方式来实现，具体为：
第一，定位服务器接收多个基站发送的信号特征和待定位终端的标识。从多个基站发送的信号特征中分别获取这多个基站中每个基站发送的信噪比。将这多个基站中每个基站发送的信噪比分别与预设阈值进行比较，筛选出信噪比大于预设阈值的基站作为有效基站。
例如，定位服务器接收基站1发送的信号特征S4和待定位终端的标识phone1，接收基站2发送的信号特征S5和待定位终端的标识phone1，接收基站3发送的信号特征S6和待定位终端的标识phone1，以及接收基站4发送的信号特征S7和待定位终端的标识phone1。从基站1、2、3和4发送的信号特征S4、S5、S6和S7中分别获取基站1、2、3和4发送的信噪比SNR1、SNR2、SNR3和SNR4。将基站1、2、3和4发送的信噪比分别与预设阈值进行比较。假设基站1、2和3的信噪比均大于预设阈值，而基站4的信噪比小于预设阈值。筛选出信噪比大于预设阈值的基站1、2和3作为有效基站。
第二，定位服务器接收多个基站发送的信号特征和待定位终端的标识。从多个基站发送的信号特征中分别获取这多个基站中每个基站发送的信噪比。将这多个基站中每个基站发送的信噪比按照预设顺序进行排序。从排序后的每个信噪比中获取最大的预设个数个信噪比。从多个基站中筛选出获取的信噪比对应的基站作为有效基站。
其中，预设顺序可以为从大到小进行排序或从小到大进行排序。优选地， 按照从大到小的顺序进行排序，然后从排序后的第一个信噪比开始选择预设个数个信噪比。
例如，假设预设顺序为从大到小进行排序，预设个数为3。定位服务器接收基站1发送的信号特征S4和待定位终端的标识phone1，接收基站2发送的信号特征S5和待定位终端的标识phone1，接收基站3发送的信号特征S6和待定位终端的标识phone1，以及接收基站4发送的信号特征S7和待定位终端的标识phone1。从基站1、2、3和4发送的信号特征S4、S5、S6和S7中分别获取基站1、2、3和4发送的信噪比SNR1、SNR2、SNR3和SNR4。将基站1、2、3和4发送的信噪比按照从大到小的顺序进行排序，假设排序后的信噪比的顺序为SNR2、SNR3、SNR1和SNR4。从排序后的第一个信噪比SNR2开始获取3个信噪比，即获取信噪比SNR2、SNR3和SNR1。从这多个基站中筛选出获取的信噪比SNR2、SNR3和SNR1分别对应的基站2、3和1作为有效基站。
其中，通过上述步骤308的操作筛选出有效基站之后，可以通过如下步骤309和310的操作来获取待定位终端对应的定位数组集合。
步骤309：定位服务器根据有效基站发送的信号特征，获取待定位终端对应的相对功率集合；
具体地，定位服务器从确定的有效基站中任意选取两个基站，将选取的两个基站组成基站组合，如此得到多个基站组合。对于得到的多个基站组合中的任一基站组合，从该基站组合包括的两个基站发送的信号特征中分别获取这两个基站发送的信号功率以及这两个基站的基站标识。计算这两个基站发送信号功率之间的差值，将计算的差值作为这两个基站之间的相对功率，将该相对功率和这两个基站的基站标识组成包含该相对功率的元素。对于多个基站组合中除该基站组合以外的其他每个基站组合，都可以同该基站组合，按照上述操作来获取包含其他每个基站组合中包括的两个基站之间的相对功率的元素。将得到的包含每个相对功率的元素组成待定位终端对应的相对功率集合。
例如，定位服务器从确定的有效基站1、2和3中任意选取两个基站，假设选取了基站1和2，将选取的基站1和2组成基站组合(1,2)，同样可以得到基站组合(1,3)和(2,3)。从基站组合(1,2)包括的基站1和2发送的信号特征S4和S5中分别获取基站1和2发送的信号功率p4和p5，以及获取基站1的基站标识eNB1和基站2的基站标识eNB2。计算基站1和2发送的信号功 率p4和p5之间的差值(p4-p5)，将计算的差值(p4-p5)作为基站1和2之间的相对功率，将该相对功率(p4-p5)、基站1的基站标识eNB1和基站2的基站标识eNB2组成包含相对功率(p4-p5)的元素[(p4-p5)，eNB1，eNB2]。同样按照上述操作得到包含基站1和3之间的相对功率为(p4-p6)的元素[(p4-p6)，eNB1，eNB3]，以及包含基站2和3之间的相对功率为(p5-p6)的元素[(p5-p6)，eNB2，eNB3]。将得到的元素[(p4-p5)，eNB1，eNB2]、[(p4-p6)，eNB1，eNB3]和[(p5-p6)，eNB2，eNB3]组成待定位终端对应的相对功率集合U2。
步骤310：定位服务器根据相对功率集合和多个基站发送的附加特征，分别获取相对功率集合中包括的每个相对功率对应的定位数组，组成待定位终端对应的定位数组集合；
具体地，定位服务器从相对功率集合中获取一个元素，从该元素中获取相对功率和两个基站标识，将这两个基站标识对应的两个基站确定为该相对功率对应的两个基站。从多个基站发送的附加特征中，分别获取这两个基站发送的附加特征。将该相对功率和这两个基站发送的附加特征组成包含该相对功率的定位数组。对于相对功率集合中包括的除该元素以外的其他每个元素，都可以同该元素按照上述操作分别获取包含其他每个元素中包括的相对功率的定位数组。将获取的每个定位数组组成待定位终端对应的定位数组集合。
例如，定位服务器从相对功率集合U2中获取一个元素，假设获取的元素为[(p4-p5)，eNB1，eNB2]，从该元素[(p4-p5)，eNB1，eNB2]中获取相对功率(p4-p5)以及基站标识eNB1和eNB2，将基站标识eNB1和eNB2分别对应的基站1和2确定为该相对功率(p4-p5)对应的两个基站。从基站1、2、3和4发送的附加特征F4、F5、F6和F7中，分别获取基站1和2发送的附加特征F4和F5。将该相对功率(p4-p5)以及基站1和2发送的附加特征F4和F5组成包含该相对功率(p4-p5)的定位数组[(p4-p5)，F4，F5]。同样按照上述操作获得包含相对功率(p4-p6)的定位数组[(p4-p6)，F4，F6]，以及包含相对功率(p5-p6)的定位数组[(p5-p6)，F5，F6]。将获取的定位数组[(p4-p5)，F4，F5]、[(p4-p6)，F4，F6]和[(p5-p6)，F5，F6]组成待定位终端对应的定位数组集合V2。
其中，通过上述步骤309和310的操作获取到待定位终端对应的定位数组集合之后，通过如下步骤311的操作来获取待定位终端的位置信息，并将该位 置信息发送给待定位终端。
步骤311：定位服务器根据待定位终端对应的定位数组集合，确定待定位终端对应的位置信息，并将该位置信息发送给待定位终端。
具体地，定位服务器从已存储的定位数组集合与位置信息的对应关系中获取该对应关系中包括的每个定位数组集合，分别计算待定位终端对应的定位数组集合与获取的每个定位数组集合之间的相似度，确定相似度最大的定位数组集合。根据该定位数组集合，从定位数组集合与位置信息的对应关系中确定对应的位置信息，将该位置信息确定为待定位终端对应的位置信息。根据待定位终端的标识，将该位置信息发送给待定位终端。
例如，定位服务器从已存储的如表1所示的定位数组集合与位置信息的对应关系中获取该对应关系中包括的定位数组集合V1和V3，分别计算待定位终端对应的定位数组集合V2与获取的定位数组集合V1和V3之间的相似度，假设与V1之间的相似度为0.95，与V3之间的相似度为0.5。确定相似度最大的定位数组集合为V1。根据该定位数组集合V1，从如表1所示的定位数组集合与位置信息的对应关系中确定对应的位置信息(45,50)，将该位置信息(45,50)确定为待定位终端对应的位置信息。根据待定位终端的标识phone1，将该位置信息(45,50)发送给待定位终端。
在本发明实施例中，接收多个基站中的每个基站发送的信号特征和待定位终端的标识，基站的信号特征包括信号功率和附加特征，该附加特征至少包括该基站的基站标识和信号传输时间；根据多个基站发送的信号功率，确定相对功率集合，其中，该相对功率集合包含多个基站中任意两个基站之间的相对功率；根据相对功率集合和多个基站发送的附加特征，确定待定位终端的标识对应的终端的位置信息。由于根据多个基站发送信号功率获取了相对功率集合，根据相对功率集合和多个基站发送的附加特征来获取待定位终端的位置信息，如此使用相对功率来获取位置信息，避免了终端发射功率不同造成的影响，大大减小了获取的位置信息的误差。
实施例4
参见图4，本发明实施例提供了一种获取位置信息的装置，该装置包括存储器401和处理器402，用于执行如下所述一种获取位置信息的方法，包括：
接收多个基站中的每个基站发送的信号特征和待定位终端的标识，基站的 信号特征包括信号功率和附加特征，该附加特征至少包括该基站的基站标识和信号传输时间；
根据多个基站发送的信号功率，确定相对功率集合，其中，该相对功率集合包含多个基站中任意两个基站之间的相对功率；
根据相对功率集合和多个基站发送的附加特征，确定待定位终端的标识对应的终端的位置信息。
优选地，根据多个基站发送的信号功率，确定相对功率集合，包括：
计算第一基站发送的信号功率与第二基站发送的信号功率之间的差值，第一基站为多个基站中的任一基站，第二基站为多个基站中除第一基站外的任一基站；
将差值确定为第一基站与第二基站之间的相对功率，将该相对功率添加到相对功率集合中。
优选地，根据相对功率集合和多个基站发送的附加特征，确定待定位终端的标识对应的终端的位置信息，包括：
根据相对功率集合和多个基站发送的附加特征，分别获取相对功率集合中包括的每个相对功率对应的定位数组，组成定位数组集合；
根据定位数组集合，从定位数组集合与位置信息的对应关系中确定待定位终端的标识对应的终端的位置信息。
优选地，根据相对功率集合和多个基站发送的附加特征，分别获取相对功率集合中包括的每个相对功率对应的定位数组，包括：
确定第一相对功率对应的两个基站，第一相对功率为相对功率集合中包括的任一相对功率；
从多个基站发送的附加特征中，分别获取两个基站发送的附加特征；
将第一相对功率和两个基站发送的附加特征组成第一相对功率对应的定位数组。
进一步地，接收多个基站发送的信号特征和待定位终端的标识之前，还包括：
获取测量终端的位置信息；
接收多个基站发送的信号特征，该信号特征包括信号功率和附加特征，该附加特征至少包括基站标识和信号传输时间；
根据多个基站发送的信号特征，获取测量终端对应的定位数组集合；
将定位数组集合和测量终端的位置信息存储在定位数组集合与位置信息的对应关系中。
优选地，根据多个基站发送的信号特征，获取测量终端对应的定位数组集合，包括：
根据多个基站发送的信号功率，计算多个基站中任意两个基站之间的相对功率，组成相对功率集合；
根据相对功率集合和多个基站发送的附加特征，分别获取相对功率集合中包括的每个相对功率对应的定位数组，组成测量终端对应的定位数组集合。
优选地，该附加特征还包括信噪比；
根据多个基站发送的信号功率，确定相对功率集合，包括：
根据多个基站中每个基站发送的附加特征中包括的信噪比，从多个基站中筛选出有效基站；
根据有效基站发送的信号功率，计算有效基站中任意两个有效基站之间的相对功率，组成相对功率集合。
优选地，根据多个基站中每个基站发送的附加特征中包括的信噪比，从多个基站中筛选出有效基站，包括：
将多个基站中每个基站发送的信噪比分别与预设阈值进行比较；
筛选出信噪比大于预设阈值的基站作为有效基站。
优选地，根据多个基站中每个基站发送的附加特征中包括的信噪比，从多个基站中筛选出有效基站，包括：
将多个基站中每个基站发送的信噪比按照预设顺序进行排序；
从排序后的每个信噪比中获取最大的预设个数个信噪比；
从多个基站中筛选出获取的信噪比对应的基站作为有效基站。
在本发明实施例中，接收多个基站中的每个基站发送的信号特征和待定位终端的标识，基站的信号特征包括信号功率和附加特征，该附加特征至少包括该基站的基站标识和信号传输时间；根据多个基站发送的信号功率，确定相对功率集合，其中，该相对功率集合包含多个基站中任意两个基站之间的相对功率；根据相对功率集合和多个基站发送的附加特征，确定待定位终端的标识对应的终端的位置信息。由于根据多个基站发送信号功率获取了相对功率集合，根据相对功率集合和多个基站发送的附加特征来获取待定位终端的位置信息，如此使用相对功率来获取位置信息，避免了终端发射功率不同造成的影响，大 大减小了获取的位置信息的误差。
本领域普通技术人员可以理解实现上述实施例的全部或部分步骤可以通过硬件来完成，也可以通过程序来指令相关的硬件完成，所述的程序可以存储于一种计算机可读存储介质中，上述提到的存储介质可以是只读存储器，磁盘或光盘等。
以上所述仅为本发明的较佳实施例，并不用以限制本发明，凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (19)

  1. 一种获取位置信息的装置，其特征在于，所述装置包括：
    第一接收模块，用于接收多个基站中的每个基站发送的信号特征和待定位终端的标识，基站的信号特征包括信号功率和附加特征，所述附加特征至少包括所述基站的基站标识和信号传输时间；
    第一确定模块，用于根据所述多个基站发送的信号功率，确定相对功率集合，其中，所述相对功率集合包含所述多个基站中任意两个基站之间的相对功率；
    第二确定模块，用于根据所述相对功率集合和所述多个基站发送的附加特征，确定所述待定位终端的标识对应的终端的位置信息。
  2. 如权利要求1所述的装置，其特征在于，所述第一确定模块包括：
    第一计算单元，用于计算第一基站发送的信号功率与第二基站发送的信号功率之间的差值，所述第一基站为所述多个基站中的任一基站，所述第二基站为所述多个基站中除所述第一基站外的任一基站；
    添加单元，用于将所述差值确定为所述第一基站与所述第二基站之间的相对功率，将所述相对功率添加到相对功率集合中。
  3. 如权利要求1所述的装置，其特征在于，所述第二确定模块包括：
    第一获取单元，用于根据所述相对功率集合和所述多个基站发送的附加特征，分别获取所述相对功率集合中包括的每个相对功率对应的定位数组，组成定位数组集合；
    确定单元，用于根据所述定位数组集合，从定位数组集合与位置信息的对应关系中确定所述待定位终端的标识对应的终端的位置信息。
  4. 如权利要求3所述的装置，其特征在于，所述第一获取单元包括：
    确定子单元，用于确定第一相对功率对应的两个基站，所述第一相对功率为所述相对功率集合中包括的任一相对功率；
    第一获取子单元，用于从所述多个基站发送的附加特征中，分别获取所述两个基站发送的附加特征；
    组成子单元，用于将所述第一相对功率和所述两个基站发送的附加特征组成所述第一相对功率对应的定位数组。
  5. 如权利要求1所述的装置，其特征在于，所述装置还包括：
    第一获取模块，用于获取测量终端的位置信息；
    第二接收模块，用于接收多个基站发送的信号特征，所述信号特征包括信号功率和附加特征，所述附加特征至少包括基站标识和信号传输时间；
    第二获取模块，用于根据所述多个基站发送的信号特征，获取所述测量终端对应的定位数组集合；
    存储模块，用于将所述定位数组集合和所述测量终端的位置信息存储在定位数组集合与位置信息的对应关系中。
  6. 如权利要求5所述的装置，其特征在于，所述第二获取模块包括：
    第二计算单元，用于根据所述多个基站发送的信号功率，计算所述多个基站中任意两个基站之间的相对功率，组成相对功率集合；
    第二获取单元，用于根据所述相对功率集合和所述多个基站发送的附加特征，分别获取所述相对功率集合中包括的每个相对功率对应的定位数组，组成所述测量终端对应的定位数组集合。
  7. 如权利要求1所述的装置，其特征在于，所述附加特征还包括信噪比；
    所述第一确定模块包括：
    筛选单元，用于根据所述多个基站中每个基站发送的附加特征中包括的信噪比，从所述多个基站中筛选出有效基站；
    第三计算单元，用于根据所述有效基站发送的信号功率，计算所述有效基站中任意两个有效基站之间的相对功率，组成相对功率集合。
  8. 如权利要求7所述的装置，其特征在于，所述筛选单元包括：
    比较子单元，用于将所述多个基站中每个基站发送的信噪比分别与预设阈值进行比较；
    第一筛选子单元，用于筛选出信噪比大于所述预设阈值的基站作为有效基站。
  9. 如权利要求7所述的装置，其特征在于，所述筛选单元包括：
    排序子单元，用于将所述多个基站中每个基站发送的信噪比按照预设顺序进行排序；
    第二获取子单元，用于从所述排序后的每个信噪比中获取最大的预设个数个信噪比；
    第二筛选子单元，用于从所述多个基站中筛选出所述获取的信噪比对应的基站作为有效基站。
  10. 一种获取位置信息的方法，其特征在于，所述方法包括：
    接收多个基站中的每个基站发送的信号特征和待定位终端的标识，基站的信号特征包括信号功率和附加特征，所述附加特征至少包括所述基站的基站标识和信号传输时间；
    根据所述多个基站发送的信号功率，确定相对功率集合，其中，所述相对功率集合包含所述多个基站中任意两个基站之间的相对功率；
    根据所述相对功率集合和所述多个基站发送的附加特征，确定所述待定位终端的标识对应的终端的位置信息。
  11. 如权利要求10所述的方法，其特征在于，所述根据所述多个基站发送的信号功率，确定相对功率集合，包括：
    计算第一基站发送的信号功率与第二基站发送的信号功率之间的差值，所述第一基站为所述多个基站中的任一基站，所述第二基站为所述多个基站中除所述第一基站外的任一基站；
    将所述差值确定为所述第一基站与所述第二基站之间的相对功率，将所述相对功率添加到相对功率集合中。
  12. 如权利要求10所述的方法，其特征在于，所述根据所述相对功率集合和所述多个基站发送的附加特征，确定所述待定位终端的标识对应的终端的位置信息，包括：
    根据所述相对功率集合和所述多个基站发送的附加特征，分别获取所述相对功率集合中包括的每个相对功率对应的定位数组，组成定位数组集合；
    根据所述定位数组集合，从定位数组集合与位置信息的对应关系中确定所述待定位终端的标识对应的终端的位置信息。
  13. 如权利要求12所述的方法，其特征在于，所述根据所述相对功率集合和所述多个基站发送的附加特征，分别获取所述相对功率集合中包括的每个相对功率对应的定位数组，包括：
    确定第一相对功率对应的两个基站，所述第一相对功率为所述相对功率集合中包括的任一相对功率；
    从所述多个基站发送的附加特征中，分别获取所述两个基站发送的附加特征；
    将所述第一相对功率和所述两个基站发送的附加特征组成所述第一相对功率对应的定位数组。
  14. 如权利要求10所述的方法，其特征在于，所述接收多个基站发送的信号特征和待定位终端的标识之前，还包括：
    获取测量终端的位置信息；
    接收多个基站发送的信号特征，所述信号特征包括信号功率和附加特征，所述附加特征至少包括基站标识和信号传输时间；
    根据所述多个基站发送的信号特征，获取所述测量终端对应的定位数组集合；
    将所述定位数组集合和所述测量终端的位置信息存储在定位数组集合与位置信息的对应关系中。
  15. 如权利要求14所述的方法，其特征在于，所述根据所述多个基站发送的信号特征，获取所述测量终端对应的定位数组集合，包括：
    根据所述多个基站发送的信号功率，计算所述多个基站中任意两个基站之间的相对功率，组成相对功率集合；
    根据所述相对功率集合和所述多个基站发送的附加特征，分别获取所述相对功率集合中包括的每个相对功率对应的定位数组，组成所述测量终端对应的定位数组集合。
  16. 如权利要求10所述的方法，其特征在于，所述附加特征还包括信噪比；
    所述根据所述多个基站发送的信号功率，确定相对功率集合，包括：
    根据所述多个基站中每个基站发送的附加特征中包括的信噪比，从所述多个基站中筛选出有效基站；
    根据所述有效基站发送的信号功率，计算所述有效基站中任意两个有效基站之间的相对功率，组成相对功率集合。
  17. 如权利要求16所述的方法，其特征在于，所述根据所述多个基站中每个基站发送的附加特征中包括的信噪比，从所述多个基站中筛选出有效基站，包括：
    将所述多个基站中每个基站发送的信噪比分别与预设阈值进行比较；
    筛选出信噪比大于所述预设阈值的基站作为有效基站。
  18. 如权利要求16所述的方法，其特征在于，所述根据所述多个基站中每个基站发送的附加特征中包括的信噪比，从所述多个基站中筛选出有效基站，包括：
    将所述多个基站中每个基站发送的信噪比按照预设顺序进行排序；
    从所述排序后的每个信噪比中获取最大的预设个数个信噪比；
    从所述多个基站中筛选出所述获取的信噪比对应的基站作为有效基站。
  19. 一种获取位置信息的装置，其特征在于，所述装置包括：
    存储器和处理器，用于执行上述第10至18任一项权利要求所述的方法。
PCT/CN2014/090312 2014-11-05 2014-11-05 一种获取位置信息的方法及装置 Ceased WO2016070347A1 (zh)

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