CN106792944B - High-speed rail private network cell switches point detecting method and system - Google Patents
High-speed rail private network cell switches point detecting method and system Download PDFInfo
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- CN106792944B CN106792944B CN201611260537.7A CN201611260537A CN106792944B CN 106792944 B CN106792944 B CN 106792944B CN 201611260537 A CN201611260537 A CN 201611260537A CN 106792944 B CN106792944 B CN 106792944B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0077—Transmission or use of information for re-establishing the radio link of access information of target access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
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- 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
Abstract
The present invention relates to a kind of high-speed rail private network cell switching point detecting method and systems, when being positioned to high-speed rail private network cell switching point to be measured, the received signal strength of high-speed rail private network cell switching point to be measured is obtained first, according to the received signal strength of the high-speed rail private network cell switching point to be measured, preset second signal Strength degradation model, and the difference in signal strength-distance correspondence formula, the high-speed rail private network cell switching point to be measured is calculated to the distance for cutting out cell base station, to calculate the position coordinates for obtaining the high-speed rail private network cell switching point to be measured.Therefore, signal strength compensation can be carried out to the various interference of high-speed rail private network cell switching point position fixing process according to the difference in signal strength-distance correspondence, improves the accuracy of the switching point location between high-speed rail private network cell.
Description
Technical field
The present invention relates to the technical fields of communication network information detection, more particularly to a kind of high-speed rail private network cell switching point
Detection method and a kind of high-speed rail private network cell switching point detection system.
Background technique
With the development of high-speed rail technology, high-speed railway has become the pith of railway transport of passengers.High-speed railway base at present
The covering of this realization mobile wireless network, but still have deficiency, simultaneously because high-speed rail speed is fast, Doppler effect is significant, network quality
There is a problem of severeer.
And high-speed railway mobile wireless network is optimized, then it needs to click through the switching between high-speed rail private network cell
Row positioning.And the switching point is positioned, it needs to take measuring device in high-speed rail, repeated multiple times measurement, and measure
As a result accuracy also will receive influence of the particular surroundings of high-speed rail to measuring device and reduce.
Summary of the invention
Based on this, it is necessary to the technical issues of for switching point position inaccurate between high-speed rail private network cell, provide one
Kind high-speed rail private network cell switching point detecting method and a kind of high-speed rail private network cell switching point detection system, can be improved high-speed rail
The accuracy of switching point location between private network cell.
A kind of high-speed rail private network cell switching point detecting method, comprising the following steps:
According to high-speed rail private network cell work parameter evidence, the cell switching sequence of high-speed rail when driving is obtained；
High-speed rail communication user is obtained in the absolute fix coordinate of each high-speed rail private network cell switching point, calculates each height
Iron private network cell switching point is to the distance for cutting out cell base station；
According to the distance and preset first signal intensity attenuation model, the communication user is calculated each described
The received signal strength of high-speed rail private network cell switching point；
The actual measurement received signal strength of the high-speed rail private network cell switching point is obtained, each high-speed rail private network cell is calculated
The received signal strength calculated value of switching point and the actual measurement receive the signal strength difference of signal；
By being fitted iteration, the signal strength difference and the high-speed rail private network cell switching point are obtained to cutting out cell base
The difference in signal strength for the distance stood-distance correspondence formula；
High-speed rail communication user is obtained in the received signal strength of high-speed rail private network cell switching point to be measured, according to described to be measured
The received signal strength of high-speed rail private network cell switching point, preset second signal Strength degradation model and the signal it is strong
Difference-distance correspondence formula is spent, calculates the high-speed rail private network cell switching point to be measured to the distance for cutting out cell base station；
According to the position coordinates for cutting out cell base station, the high-speed rail private network cell switching point to be measured to cutting out cell
The distance of base station and the position coordinates of high-speed rail route calculate the position coordinates of the high-speed rail private network cell switching point to be measured.
A kind of high-speed rail private network cell switching point detection system, comprising:
Switching sequence obtains module, for obtaining the cell of high-speed rail when driving and cutting according to high-speed rail private network cell work parameter evidence
Change sequence；
First distance computing module, for obtaining high-speed rail communication user in the actual measurement position of each high-speed rail private network cell switching point
Coordinate is set, calculates each high-speed rail private network cell switching point to the distance for cutting out cell base station；
Signal strength calculates module, for calculating according to the distance and preset first signal intensity attenuation model
Received signal strength of the communication user in each high-speed rail private network cell switching point；
Difference in signal strength computing module, for obtaining the actual measurement received signal strength of the high-speed rail private network cell switching point,
The signal of the received signal strength calculated value and the actual measurement reception signal that calculate each high-speed rail private network cell switching point is strong
Spend difference；
Fitting module, for obtaining the signal strength difference and the high-speed rail private network cell switching by fitting iteration
Difference in signal strength-distance correspondence formula of the point to the distance for cutting out cell base station；
Second distance computing module, for obtaining high-speed rail communication user in the reception of high-speed rail private network cell switching point to be measured
Signal strength declines according to the received signal strength of the high-speed rail private network cell switching point to be measured, preset second signal intensity
Subtract model and the difference in signal strength-distance correspondence formula, calculates the high-speed rail private network cell switching point to be measured to cutting
The distance of cell base station out；
Positions calculations module, position coordinates, the high-speed rail private network to be measured for cutting out cell base station according to are small
It is small to calculate the high-speed rail private network to be measured to the distance for cutting out cell base station and the position coordinates of high-speed rail route for area's switching point
The position coordinates of area's switching point.
Above-mentioned high-speed rail private network cell switching point detecting method and system, it is special in each high-speed rail by obtaining high-speed rail communication user
The absolute fix coordinate of net cell switching point, calculate each high-speed rail private network cell switching point to cut out cell base station away from
From；According to preset first signal intensity attenuation model, calculates the communication user and switch in each high-speed rail private network cell
The received signal strength of point；The received signal strength and the reference for calculating each high-speed rail private network cell switching point receive letter
Number signal strength difference.And by fitting iteration, obtains the signal strength difference and the high-speed rail private network cell switches
Difference in signal strength-distance correspondence formula of the point to the distance for cutting out cell base station.
When positioning to high-speed rail private network cell switching point to be measured, high-speed rail private network cell switching to be measured is obtained first
The received signal strength of point, according to the received signal strength of the high-speed rail private network cell switching point to be measured, preset second letter
Number Strength degradation model and the difference in signal strength-distance correspondence formula calculate the high-speed rail private network cell to be measured and cut
It changes a little to the distance of cell base station is cut out, to calculate the position coordinates for obtaining the high-speed rail private network cell switching point to be measured.
It therefore, can be to high-speed rail private network cell switching point position fixing process according to the difference in signal strength-distance correspondence
Various interference carry out signal strength compensation, improve high-speed rail private network cell between switching point location accuracy.
Detailed description of the invention
Fig. 1 is that the high-speed rail private network cell of one embodiment switches the flow chart of point detecting method；
Fig. 2 is the flow chart of the communication user detection method in the high-speed rail of one embodiment；
Fig. 3 is the flow chart of the communication user detection method in the high-speed rail of another embodiment；
Fig. 4 is the structural schematic diagram of the high-speed rail private network cell switching point detection system of one embodiment；
Fig. 5 is the structural schematic diagram of the communication user detection system in the high-speed rail of one embodiment；
Fig. 6 is the structural schematic diagram of the communication user detection system in the high-speed rail of another embodiment.
Specific embodiment
With reference to the accompanying drawing to the specific embodiment of high-speed rail private network cell switching point detecting method and system of the invention
It is described in detail.
Refering to fig. 1, Fig. 1 is the flow chart of the high-speed rail private network cell switching point detecting method of one embodiment, including as follows
Step:
S102 obtains the cell switching sequence of high-speed rail when driving according to high-speed rail private network cell work parameter evidence；
S104 obtains high-speed rail communication user in the absolute fix coordinate of each high-speed rail private network cell switching point, calculates each
The high-speed rail private network cell switching point is to the distance for cutting out cell base station；
S106 calculates the communication user each according to the distance and preset first signal intensity attenuation model
The received signal strength of a high-speed rail private network cell switching point；
S108 obtains the actual measurement received signal strength of the high-speed rail private network cell switching point, and it is special to calculate each high-speed rail
The received signal strength calculated value of net cell switching point and the actual measurement receive the signal strength difference of signal；
S110 obtains the signal strength difference and the high-speed rail private network cell switching point to cutting out by being fitted iteration
The difference in signal strength of the distance of cell base station-distance correspondence formula；
S112 obtains high-speed rail communication user in the received signal strength of high-speed rail private network cell switching point to be measured, according to institute
State the received signal strength of high-speed rail private network cell switching point to be measured, preset second signal Strength degradation model and described
Difference in signal strength-distance correspondence formula, calculate the high-speed rail private network cell switching point to be measured to cut out cell base station away from
From；
S114, according to the position coordinates for cutting out cell base station, the high-speed rail private network cell switching point to be measured to cutting
The position coordinates of the distance of cell base station and high-speed rail route out calculate the position of the high-speed rail private network cell switching point to be measured
Set coordinate.
When positioning to high-speed rail private network cell switching point to be measured, high-speed rail private network cell switching to be measured is obtained first
The received signal strength of point, according to the received signal strength of the high-speed rail private network cell switching point to be measured, preset second letter
Number Strength degradation model and the difference in signal strength-distance correspondence formula calculate the high-speed rail private network cell to be measured and cut
It changes a little to the distance of cell base station is cut out, to calculate the position coordinates for obtaining the high-speed rail private network cell switching point to be measured.
It therefore, can be to the various dry of high-speed rail private network cell switching point position fixing process according to the difference in signal strength-distance correspondence
It disturbs and carries out signal strength compensation, improve the accuracy of the switching point location between high-speed rail private network cell.
Wherein, for step S102, the high-speed rail private network can be various mobile communications networks, preferably LTE network.
LTE (Long Term Evolution, long term evolution) is by 3GPP (The 3rd Generation
Partnership Project, third generation partner program) UMTS (the Universal Mobile that organizes to set up
Telecommunications System, Universal Mobile Communication System) technical standard long term evolution, it improves and enhances
The aerial access technology of 3G, using OFDM (Orthogonal Frequency Division Multiplexing, orthogonal frequency
Multiplexing technology) and MIMO (Multiple-Input Multiple-Output, multi-input multi-output system) be used as its wireless network
The sole criterion of network evolution.The peak value speed of downlink 100Mbit/s and uplink 50Mbit/s is capable of providing under 20MHz spectral bandwidth
Rate.The performance of Cell Edge User can be improved, cell capacity is improved and reduces system delay.
Cell is the area unit inside mobile communication management, and the covering of communication network signal passes through the covering model of antenna
It encloses, is divided into many small regions, has several user's accesses under each region wherein, and communicated.For example, have
One base station (communication iron tower), its effective coverage distance (mobile phone can receive signal, while can also return signal to base station)
It is 10KM, then 10km is radius using this base station as the center of circle, draws a circle, this circle is exactly the covering institute shape of this base station
At cell.
And the high-speed rail private network cell is to aim at the cell being arranged along high-speed rail and/or main overlay area to have high-speed rail route
The cell of process.The work parameter evidence of the high-speed rail private network cell, can obtain from the server of communication network operator.It is described
Work parameter is according to may include one of the following or multiple: cell ID (Cell ID), base station location, coverage area and network
Type.
According to the base station location and coverage area of the high-speed rail private network cell, it can calculate what high-speed rail was successively passed through when driving
High-speed rail private network cell obtains the cell switching sequence.
In one embodiment, the step of obtaining high-speed rail cell switching sequence when driving include:
According to high-speed rail private network cell work parameter evidence, obtain high-speed rail along first direction first community switching sequence when driving with
And second community switching sequence when driving in a second direction.
Generally, a railway all can be there are two the train driving in direction, and therefore, the cell switching sequence of acquisition also has two
A direction.Such as can get high-speed rail travel positive cell switching sequence (A/B/C/ .../N) and reversed cell switching sequence (N/ .../
C/B/A)。
In step S104, obtain high-speed rail communication user each high-speed rail private network cell switching point absolute fix coordinate,
Each high-speed rail private network cell switching point is calculated to the distance for cutting out cell base station；
Such as according to the high-speed rail communication user each high-speed rail private network cell switching point absolute fix coordinate, and it is corresponding
The position coordinates for cutting out cell base station, calculate each high-speed rail private network cell switching point to the distance for cutting out cell base station.
Preferably, the absolute fix coordinate of the high-speed rail private network cell switching point is the actual measurement longitude and latitude of the high-speed rail private network cell switching point
Coordinate is spent, the position coordinates for cutting out cell base station are the latitude and longitude coordinates for cutting out cell base station.
The communication is calculated according to the distance and preset first signal intensity attenuation model for step S106
Received signal strength of the user in each high-speed rail private network cell switching point；
The first signal intensity attenuation model includes:
(1)Lm(d)=46.3+33.9logf-13.82loghte-a(hre)+(44.9-6.55loghte)logd；
Wherein, LmIt (d) is path loss, f is carrier frequency；hteIt is effective height of transmitting antenna；hreIt is that receiving antenna has
Effect height；D is the high-speed rail private network cell switching point to the distance for cutting out cell base station；a(hre) it is portable antenna modifying factor,
Its numerical value are as follows:
a(hre)=(1.1log f-0.7) hre-(1.56log f-0.8)dB；
(2)PH=PTX+GT-LRS-LCS-Lm(d)；
Wherein, PHFor the received signal strength of the high-speed rail private network cell switching point；PTXFor antenna opening signal strength；GTFor
Antenna gain is equal to transmitter antenna gain (dBi)+receiving antenna gain；LRSFor human body loss；LCSFor car body loss；LmFor path damage
Consumption.
Above-mentioned first signal strength is substituted into first according to high-speed rail private network cell switching point to the distance d for cutting out cell base station to decline
Subtract (1) formula of model, calculates path loss Lm(d), then by path loss Lm(d) (2) formula is substituted into, the communication user is calculated
In the received signal strength P of each high-speed rail private network cell switching pointH。
For step S108, the actual measurement received signal strength of the high-speed rail private network cell switching point is obtained, each institute is calculated
The received signal strength calculated value and the actual measurement of stating high-speed rail private network cell switching point receive the signal strength difference of signal.
For step S110, by obtaining the sampled data of multiple high-speed rail private network cell switching points, according to above-mentioned steps
S102-S108, calculate each sampled point to the distance d for cutting out cell base station1、d2、d3……dnIt is strong with the corresponding signal
Spend difference PH1、PH2、PH3……PHn, by the fitting iteration of multiple sampled points, obtain the signal strength difference and the high-speed rail
Difference in signal strength-distance correspondence formula of the private network cell switching point to the distance for cutting out cell base station: CM=f (d).
For step S112, it is strong in the reception signal of high-speed rail private network cell switching point to be measured to obtain high-speed rail communication user
Degree, according to received signal strength, the preset second signal Strength degradation model of the high-speed rail private network cell switching point to be measured,
And the difference in signal strength-distance correspondence formula, the high-speed rail private network cell switching point to be measured is calculated to cutting out cell
The distance of base station.
High-speed rail communication user can pass through measured data in the received signal strength of high-speed rail private network cell switching point to be measured
It obtains, or the RSRP value in the MR data for passing through the high-speed rail private network cell switching point to be measured obtains.
The second signal Strength degradation model includes:
(2)PH=PTX+GT-LRS-LCS-Lm(d)；
Wherein, PHFor the received signal strength of the high-speed rail private network cell switching point；PTXFor antenna opening signal strength；GTFor
Antenna gain is equal to transmitter antenna gain (dBi)+receiving antenna gain；LRSFor human body loss；LCSFor car body loss；LmFor path damage
Consumption；
(3)Lm(d)=46.3+33.9logf-13.82loghte-a(hre)+(44.9-6.55loghte)logd+CM；
Wherein, LmIt (d) is path loss, f is carrier frequency；hteIt is effective height of transmitting antenna；hreIt is that receiving antenna has
Effect height；D is the high-speed rail private network cell switching point to the distance for cutting out cell base station；a(hre) it is portable antenna modifying factor,
Its numerical value are as follows:
a(hre)=(1.1log f-0.7) hre-(1.56log f-0.8)dB；CMFor difference in signal strength.
In step S112, by the received signal strength and the signal of the high-speed rail private network cell switching point to be measured
Intensity difference-distance correspondence formula: CM=f (d) substitutes into above-mentioned second signal Strength degradation model, can calculate described to be measured
High-speed rail private network cell switching point to the distance for cutting out cell base station.
For step S114, cut according to the position coordinates for cutting out cell base station, the high-speed rail private network cell to be measured
It changes a little to the position coordinates of the distance and high-speed rail route that cut out cell base station, calculates the high-speed rail private network cell to be measured and cut
Change position coordinates a little.
The high-speed rail private network cell switching point to be measured is obtained to the distance d for cutting out cell base station, calculating is cut out described in
The distance of cell base station is equal to d, and the location point on the high-speed rail route is high-speed rail private network cell switching point to be measured.
In one embodiment, since high-speed railway rail is each fixed, i.e., on high-speed rail route (track) position
With fixed longitude and latitude (Lon (G1) Lat (G1), Lon (G2) Lat (G2) ..., Lon (Gn) Lat (Gn)), according to longitude and latitude
Distance calculation formula calculating cut out cell transmission point (base station) and high-speed railway rail distance S (G1), S (G2) ..., S (Gn), can be from institute
The distance that selection cuts out cell transmission point described in each point of high-speed railway rail is stated to switch closest to the high-speed rail private network cell
The point to the distance for cutting out cell base station is put, and the corresponding longitude and latitude of point is that this cuts out cell switching position in orbit
Point.
In one embodiment, the communication user in high-speed rail is detected in the following manner, it is described so as to accurately obtain
The communication data of high-speed rail user, as shown in Figure 2.
S202 obtains the cell switching sequence of high-speed rail when driving according to high-speed rail private network cell work parameter evidence；
S204, soft according to high-speed rail private network cell adopt XDR signaling data, obtain communication user in each high-speed rail private network cell
Between switching point；
S206 is selected small continuously across three or more high-speed rail private networks according to the switching point between the high-speed rail private network cell
The communication user in area；
S208, the cell of sequence and high-speed rail when driving according to selected communication user Jing Guo the high-speed rail private network cell
Switching sequence determines the moving direction of the selected communication user；
S210, time and described two switching points according to the selected communication user by two switching points
Between distance, calculate the movement speed of the selected communication user；
S212 compares the movement speed and preset threshold speed, judges described selected lead to according to comparison result
Whether credit household is in high-speed rail.
Soft according to high-speed rail private network cell adopts XDR signaling data, obtains communication user between each high-speed rail private network cell
Switching point, candidate high-speed rail user is tentatively selected according to switching point, is switched by the cell of the candidate high-speed rail user of comparison suitable
The cell switching sequence of sequence and high-speed rail when driving, determines the moving direction of communication user.According to the switching point, switching point is obtained
The distance between, according to distance and user by the time between two switching points, user is calculated in high-speed rail driving direction
Whether movement speed can accurately judge selected communication user in high-speed rail according to the movement speed.Therefore, can
The communication user in high-speed rail is accurately identified, the user's messaging parameter obtained in accurate high-speed rail is facilitated.
For step S204, the soft hand off signaling adopted in XDR signaling data of high-speed rail private network cell is obtained, if described cut
It changes the source cell in signaling and Target cell is the neighboring community Liang Ge in the cell switching sequence of the high-speed rail when driving, then obtain
The sampled point for taking the hand off signaling is switching point of the communication user between each high-speed rail private network cell.
The hand off signaling includes at least the cell ID (Cell ID) of source cell and Target cell.
In one embodiment, the hand off signaling is that the soft of high-speed rail private network cell adopts Uu_XDR and X2_XDR data.
Wherein, Uu_XDR is chosen for the Procedure Type of " RRC_HO_intraENB/RRC_HO_interENB "
(intra ENB refers to interior switching of standing, and inter ENB refers to switching between station), X2_XDR is chosen for " X2handover "
Procedure Type。
The boundary between each cell is determined according to the switching point between the high-speed rail private network cell for step S206,
The continuous user for occupying at least three high-speed rail private network cell can be extracted.Such as user successively pass through it is A, B, C tri- adjacent small
Area is switching point between B, C, then the user is chosen between A, B.
The cell of step S208, sequence and acquisition by selected communication user Jing Guo the high-speed rail private network cell are cut
It changes sequence to be matched, determines the moving direction of the selected communication user.
Such as the corresponding first community switching sequence of first direction includes to be arranged successively in the cell switching sequence of acquisition
A, tri- adjacent cells of B, C, and the corresponding first community switching sequence of second direction includes tri- phases of C, B, A being arranged successively
Adjacent cell, and user successively passes through tri- adjacent cells of A, B, C, then the moving direction of the user is first direction, corresponding
It will be switched over according to the first community switching sequence.
For step S210, the time and described two of two switching points is passed through according to the selected communication user
Distance between a switching point calculates the movement speed of the selected communication user；
For example, passing through the corresponding time T of switching point AB according to the selected communication userABAnd switching point BC it is corresponding when
Between TBC, user is calculated in B cell coverage area SBInterior time TB=TBC-TAB, user is further calculated out in B MPS process
Average speed V in rangeB=SB/TB, wherein SBFor B cell coverage area, can by switching point AB and switching point BC away from
It is obtained from calculating.
In step S212, the movement speed of the selected communication user and preset threshold speed are compared, if
The movement speed of the selected communication user is higher than the threshold speed, then judges that the selected communication user is in high-speed rail
On；If the movement speed of the selected communication user is lower than the threshold speed, the selected communication user is judged
It is not in high-speed rail.
For example, if average speed V of the user in B cell coverage areaBGreater than the movement velocity threshold of high-speed rail scene user
Value VG(such as VG=150KM/H), then the user being judged as this user in high-speed rail.
In one embodiment, the step of movement speed and preset threshold speed being compared include:
If the moving direction of the selected communication user is first direction, select corresponding with the first direction
First Speed threshold value is compared with the movement speed of the selected communication user；
If the moving direction of the selected communication user is second direction, select corresponding with the second direction
Second speed threshold value is compared with the movement speed of selected communication user.
In the section (if any certain slope) of some special road conditions, the normally travel speed in the both direction of high-speed rail may
Inconsistent, therefore, the threshold speed in both direction can be set separately.
In one embodiment, as shown in figure 3, obtain high-speed rail private network cell work parameter according to after, further comprise with
Lower step:
S302 obtains the cell ID of preset particular cell according to high-speed rail private network cell work parameter evidence；
S304, if the soft cell ID adopted in XDR signaling data comprising the particular cell, and it is described special
The reference received signal strength that cell obtains is greater than preset signal strength threshold value, then judges that the communication user is in high-speed rail.
With reference to received signal strength, i.e. RSRP (Reference Signal Receiving Power), is in LTE network
One of key parameter and the physical layer measurement demand that wireless signal strength can be represented are the carrying reference letters in some symbol
Number all RE (resource particle) on the average value of signal strength that receives.
The particular cell (such as the cell in covering tunnel) that may be occupied according to only high-speed rail user, it is full under this cell
Sufficient RSRP sample mean PAVGGreater than signal strength threshold PGThe user of (such as PG=-115dBm) is judged as high-speed rail user, energy
Part high-speed rail user is enough more quickly determined, detection efficiency is improved.
In one embodiment, after judging the selected communication user whether in high-speed rail according to comparison result, also
The following steps are included:
The network data of communication user in high-speed rail is removed.
According to the judgement to high-speed rail user, high-speed rail user is removed, it can be achieved that using high-speed rail in a large amount of user
The specific aim at family is analyzed, and is completed soft or hard Uu, X2, UE_MR, Cell_MR, S1-MME, SGs, S1-U involved in data etc. of adopting and is connect
The statistics and analysis of mouth event, realize the event analysis of user class/cell-level control plane, user face.
The present invention realizes the removing to high-speed rail user using the magnanimity communication data of user in high-speed rail, can analyze user's reality
Border perceived quality, formulates prioritization scheme and verifies effect of optimization quick Network Search problem, completes the signaling number to high-speed rail network
Work is supported according to acquisition and modeling, special analysis, output prioritization scheme and closed-loop process etc., relative to traditional optimization, tool
The advantages such as standby reflection high-speed rail user actual perceived, time-consuming short, access period short, mass data.
It is the structural schematic diagram of the high-speed rail private network cell switching point detection system of one embodiment refering to Fig. 4, Fig. 4.
The high-speed rail private network cell switching point detection system, comprising:
Switching sequence obtains module 402, for obtaining the cell of high-speed rail when driving according to high-speed rail private network cell work parameter evidence
Switching sequence；
First distance computing module 404, for obtaining high-speed rail communication user in the reality of each high-speed rail private network cell switching point
Position coordinates are surveyed, calculate each high-speed rail private network cell switching point to the distance for cutting out cell base station；
Signal strength calculates module 406, for according to the distance and preset first signal intensity attenuation model, meter
The communication user is calculated in the received signal strength of each high-speed rail private network cell switching point；
Difference in signal strength computing module 408, it is strong that the actual measurement for obtaining the high-speed rail private network cell switching point receives signal
Degree, the received signal strength calculated value and the actual measurement that calculate each high-speed rail private network cell switching point receive the signal of signal
Strength difference；
Second distance computing module 412, for obtaining high-speed rail communication user in high-speed rail private network cell switching point to be measured
Received signal strength is strong according to the received signal strength of the high-speed rail private network cell switching point to be measured, preset second signal
Attenuation model and the difference in signal strength-distance correspondence formula are spent, the high-speed rail private network cell switching point to be measured is calculated
To the distance for cutting out cell base station；
When positioning to high-speed rail private network cell switching point to be measured, high-speed rail private network cell switching to be measured is obtained first
The received signal strength of point, according to the received signal strength of the high-speed rail private network cell switching point to be measured, preset second letter
Number Strength degradation model and the difference in signal strength-distance correspondence formula calculate the high-speed rail private network cell to be measured and cut
It changes a little to the distance of cell base station is cut out, to calculate the position coordinates for obtaining the high-speed rail private network cell switching point to be measured.
It therefore, can be to the various dry of high-speed rail private network cell switching point position fixing process according to the difference in signal strength-distance correspondence
It disturbs and carries out signal strength compensation, improve the accuracy of the switching point location between high-speed rail private network cell.
Wherein, the high-speed rail private network can be various mobile communications networks, preferably LTE network.
LTE (Long Term Evolution, long term evolution) is by 3GPP (The 3rd Generation
Partnership Project, third generation partner program) UMTS (the Universal Mobile that organizes to set up
Telecommunications System, Universal Mobile Communication System) technical standard long term evolution, it improves and enhances
The aerial access technology of 3G, using OFDM (Orthogonal Frequency Division Multiplexing, orthogonal frequency
Multiplexing technology) and MIMO (Multiple-Input Multiple-Output, multi-input multi-output system) be used as its wireless network
The sole criterion of network evolution.The peak value speed of downlink 100Mbit/s and uplink 50Mbit/s is capable of providing under 20MHz spectral bandwidth
Rate.The performance of Cell Edge User can be improved, cell capacity is improved and reduces system delay.
Cell is the area unit inside mobile communication management, and the covering of communication network signal passes through the covering model of antenna
It encloses, is divided into many small regions, has several user's accesses under each region wherein, and communicated.For example, have
One base station (communication iron tower), its effective coverage distance (mobile phone can receive signal, while can also return signal to base station)
It is 10KM, then 10km is radius using this base station as the center of circle, draws a circle, this circle is exactly the covering institute shape of this base station
At cell.
And the high-speed rail private network cell is to aim at the cell being arranged along high-speed rail and/or main overlay area to have high-speed rail route
The cell of process.The work parameter evidence of the high-speed rail private network cell, can obtain from the server of communication network operator.It is described
Work parameter is according to may include one of the following or multiple: cell ID (Cell ID), base station location, coverage area and network
Type.
According to the base station location and coverage area of the high-speed rail private network cell, it can calculate what high-speed rail was successively passed through when driving
High-speed rail private network cell obtains the cell switching sequence.
In one embodiment, switching sequence obtains module 402 according to high-speed rail private network cell work parameter evidence, obtains high-speed rail edge
First direction first community switching sequence when driving and in a second direction second community switching sequence when driving.
Generally, a railway all can be there are two the train driving in direction, and therefore, the cell switching sequence of acquisition also has two
A direction.Such as can get high-speed rail travel positive cell switching sequence (A/B/C/ .../N) and reversed cell switching sequence (N/ .../
C/B/A)。
The first distance computing module 404 obtains high-speed rail communication user in the actual measurement of each high-speed rail private network cell switching point
Position coordinates calculate each high-speed rail private network cell switching point to the distance for cutting out cell base station.Preferably, the high-speed rail is special
The absolute fix coordinate of net cell switching point be the high-speed rail private network cell switching point actual measurement latitude and longitude coordinates, it is described cut out it is small
The position coordinates of area base station are the latitude and longitude coordinates for cutting out cell base station, and the high-speed rail private network cell switching point is small to cutting out
The distance of area base station is the distance of described two latitude and longitude coordinates.
The signal strength calculates module 406 according to the distance and preset first signal intensity attenuation model, meter
The communication user is calculated in the received signal strength of each high-speed rail private network cell switching point；
The first signal intensity attenuation model includes:
(1)Lm(d)=46.3+33.9logf-13.82loghte-a(hre)+(44.9-6.55loghte)logd；
Wherein, LmIt (d) is path loss, f is carrier frequency；hteIt is effective height of transmitting antenna；hreIt is that receiving antenna has
Effect height；D is the high-speed rail private network cell switching point to the distance for cutting out cell base station；a(hre) it is portable antenna modifying factor,
Its numerical value are as follows:
a(hre)=(1.1log f-0.7) hre-(1.56log f-0.8)dB；
(2)PH=PTX+GT-LRS-LCS-Lm(d)；
Wherein, PHFor the received signal strength of the high-speed rail private network cell switching point；PTXFor antenna opening signal strength；GTFor
Antenna gain is equal to transmitter antenna gain (dBi)+receiving antenna gain；LRSFor human body loss；LCSFor car body loss；LmFor path damage
Consumption.
Above-mentioned first signal strength is substituted into first according to high-speed rail private network cell switching point to the distance d for cutting out cell base station to decline
Subtract (1) formula of model, calculates path loss Lm(d), then by path loss Lm(d) (2) formula is substituted into, the communication user is calculated
In the received signal strength P of each high-speed rail private network cell switching pointH。
It is strong that the actual measurement that the difference in signal strength computing module 408 obtains the high-speed rail private network cell switching point receives signal
Degree, the received signal strength calculated value and the actual measurement that calculate each high-speed rail private network cell switching point receive the signal of signal
Strength difference.
The fitting module 410 calculates each sampling by the sampled data of the multiple high-speed rail private network cell switching points of acquisition
Point to the distance d for cutting out cell base station1、d2、d3……dnWith the corresponding signal strength difference PH1、PH2、PH3……PHn,
By the fitting iteration of multiple sampled points, it is small to cutting out with the high-speed rail private network cell switching point to obtain the signal strength difference
The difference in signal strength of the distance of area base station-distance correspondence formula: CM=f (d).
The second distance computing module 412 obtains high-speed rail communication user connecing in high-speed rail private network cell switching point to be measured
Signal strength is received, according to the received signal strength of the high-speed rail private network cell switching point to be measured, preset second signal intensity
Attenuation model and the difference in signal strength-distance correspondence formula calculate the high-speed rail private network cell switching point to be measured and arrive
Cut out the distance of cell base station.
High-speed rail communication user can be received in the received signal strength of high-speed rail private network cell switching point to be measured by actual measurement
RSRP value in signal strength data acquisition or the MR data for passing through the high-speed rail private network cell switching point to be measured obtains.
The second signal Strength degradation model includes:
(2)PH=PTX+GT-LRS-LCS-Lm(d)；
Wherein, PHFor the received signal strength of the high-speed rail private network cell switching point；PTXFor antenna opening signal strength；GTFor
Antenna gain is equal to transmitter antenna gain (dBi)+receiving antenna gain；LRSFor human body loss；LCSFor car body loss；LmFor path damage
Consumption；
(3)Lm(d)=46.3+33.9logf-13.82loghte-a(hre)+(44.9-6.55loghte)logd+CM；
Wherein, LmIt (d) is path loss, f is carrier frequency；hteIt is effective height of transmitting antenna；hreIt is that receiving antenna has
Effect height；D is the high-speed rail private network cell switching point to the distance for cutting out cell base station；a(hre) it is portable antenna modifying factor,
Its numerical value are as follows:
a(hre)=(1.1log f-0.7) hre-(1.56log f-0.8)dB；CMFor difference in signal strength.
The second distance computing module 412 by the received signal strength of the high-speed rail private network cell switching point to be measured,
With the difference in signal strength-distance correspondence formula: CM=f (d) substitutes into above-mentioned second signal Strength degradation model, can calculate
The high-speed rail private network cell switching point to be measured is to the distance for cutting out cell base station out.
The positions calculations module 414 is according to the position coordinates for cutting out cell base station, the high-speed rail private network to be measured
Cell switching point calculates the high-speed rail private network to be measured to the distance for cutting out cell base station and the position coordinates of high-speed rail route
The position coordinates of cell switching point.
The high-speed rail private network cell switching point to be measured is obtained to the distance d for cutting out cell base station, calculating is cut out described in
The distance of cell base station is equal to d, and the location point on the high-speed rail route is high-speed rail private network cell switching point to be measured.
In one embodiment, since high-speed railway rail is each fixed, i.e., on high-speed rail route (track) position
With fixed longitude and latitude (Lon (G1) Lat (G1), Lon (G2) Lat (G2) ..., Lon (Gn) Lat (Gn)), according to longitude and latitude
Distance calculation formula calculating cut out cell transmission point (base station) and high-speed railway rail distance S (G1), S (G2) ..., S (Gn), can be from institute
The distance that selection cuts out cell transmission point described in each point of high-speed railway rail is stated to switch closest to the high-speed rail private network cell
The point to the distance for cutting out cell base station is put, and the corresponding longitude and latitude of point is that this cuts out cell switching position in orbit
Point.
In one embodiment, the high-speed rail private network cell switching point detection system further includes the communication user inspection in high-speed rail
Survey device.Fig. 5 is the structural schematic diagram of the communication user detection device in the high-speed rail of one embodiment.
Communication user detection device in the high-speed rail includes:
Switching point obtains module 504, for adopting XDR signaling data according to the soft of high-speed rail private network cell, obtains communication user
Switching point between each high-speed rail private network cell；
Selecting module 506, for selecting continuously across three or more according to the switching point between the high-speed rail private network cell
The communication user of high-speed rail private network cell；
Moving direction obtains module 508, for the sequence according to selected communication user Jing Guo the high-speed rail private network cell
And the cell switching sequence of high-speed rail when driving, determine the moving direction of the selected communication user；
Speed acquiring module 510, for according to the selected communication user by two switching points time with
And distance between described two switching points, calculate the movement speed of the selected communication user；
Communication user detection device in the high-speed rail adopts XDR signaling data according to the soft of high-speed rail private network cell, obtains logical
Switching point of the credit household between each high-speed rail private network cell tentatively selectes candidate high-speed rail user according to switching point, by right
Than cell transfer sequence and high-speed rail the cell switching sequence when driving of candidate high-speed rail user, the mobile side of communication user is determined
To.According to the switching point, obtain the distance between switching point, according to distance and user by between two switching points when
Between, movement speed of the user in high-speed rail driving direction is calculated, can accurately be judged according to the movement speed selected
Whether communication user is in high-speed rail.Therefore, the communication user in high-speed rail can be accurately identified, facilitates and obtains in accurate high-speed rail
User's messaging parameter.
The switching point obtains the soft switching letter adopted in XDR signaling data that module 504 is used to obtain high-speed rail private network cell
It enables, if the source cell and Target cell in the hand off signaling are two in the cell switching sequence of the high-speed rail when driving
Neighboring community, then the sampled point for obtaining the hand off signaling is switching of the communication user between each high-speed rail private network cell
Point.
The hand off signaling includes at least the cell ID (Cell ID) of source cell and Target cell.
In one embodiment, the hand off signaling is that the soft of high-speed rail private network cell adopts Uu_XDR and X2_XDR data.
Wherein, Uu_XDR is chosen for the Procedure Type of " RRC_HO_intraENB/RRC_HO_interENB "
(intra ENB refers to interior switching of standing, and inter ENB refers to switching between station), X2_XDR is chosen for " X2handover "
Procedure Type。
The selecting module 506 determines the side between each cell according to the switching point between the high-speed rail private network cell
Boundary can extract the continuous user for occupying at least three high-speed rail private network cell.Such as user successively pass through A, B, C tri- it is adjacent
Cell is switching point between B, C, then the user is chosen between A, B.
The moving direction obtains sequence of the module 508 by selected communication user Jing Guo the high-speed rail private network cell and obtains
The cell switching sequence obtained is matched, and determines the moving direction of the selected communication user.
Such as the corresponding first community switching sequence of first direction includes to be arranged successively in the cell switching sequence of acquisition
A, tri- adjacent cells of B, C, and the corresponding first community switching sequence of second direction includes tri- phases of C, B, A being arranged successively
Adjacent cell, and user successively passes through tri- adjacent cells of A, B, C, then the moving direction of the user is first direction, corresponding
It will be switched over according to the first community switching sequence.
The speed acquiring module 510 according to the selected communication user by the time of two switching points and
Distance between described two switching points calculates the movement speed of the selected communication user.
For example, passing through the corresponding time T of switching point AB according to the selected communication userABAnd switching point BC it is corresponding when
Between TBC, user is calculated in B cell coverage area SBInterior time TB=TBC-TAB, user is further calculated out in B MPS process
Average speed V in rangeB=SB/TB, wherein SBFor B cell coverage area, can by switching point AB and switching point BC away from
It is obtained from calculating.
The first judgment module 512 is by the movement speed of the selected communication user and preset threshold speed ratio
Compared with if the movement speed of the selected communication user judges the selected communication user higher than the threshold speed
It is in high-speed rail；If the movement speed of the selected communication user is lower than the threshold speed, judge described selected
Communication user is not in high-speed rail.
For example, if average speed V of the user in B cell coverage areaBGreater than the movement velocity threshold of high-speed rail scene user
Value VG(such as VG=150KM/H), then the user being judged as this user in high-speed rail.
In one embodiment, the moving direction obtains module 508 for the movement in the selected communication user
When direction is first direction, the shifting of corresponding with the first direction First Speed threshold value and the selected communication user is selected
Dynamic speed compares；When the moving direction of the selected communication user is second direction, select corresponding with the second direction
Second speed threshold value compared with the movement speed of selected communication user.
In the section (if any certain slope) of some special road conditions, the normally travel speed in the both direction of high-speed rail may
Inconsistent, therefore, the threshold speed in both direction can be set separately.
In one embodiment, as shown in fig. 6, communication user detection device in the high-speed rail further include:
Particular cell obtains module 602, for obtaining preset particular cell according to high-speed rail private network cell work parameter evidence
Cell ID；
With reference to received signal strength, i.e. RSRP (Reference Signal Receiving Power), is in LTE network
One of key parameter and the physical layer measurement demand that wireless signal strength can be represented are the carrying reference letters in some symbol
Number all RE (resource particle) on the average value of signal strength that receives.
The particular cell (such as the cell in covering tunnel) that may be occupied according to only high-speed rail user, it is full under this cell
Sufficient MR RSRP sample mean PAVGGreater than signal strength threshold PGThe user of (such as PG=-115dBm) is judged as high-speed rail user,
Part high-speed rail user can be more quickly determined, detection efficiency is improved.
In one embodiment, the communication user detection device in the high-speed rail further include:
Data strip module, for after judging the selected communication user whether in high-speed rail, in high-speed rail
The network data of communication user removed.
According to the judgement to high-speed rail user, high-speed rail user is removed, it can be achieved that using high-speed rail in a large amount of user
The specific aim at family is analyzed, and is completed soft or hard Uu, X2, UE_MR, Cell_MR, S1-MME, SGs, S1-U involved in data etc. of adopting and is connect
The statistics and analysis of mouth event, realize the event analysis of user class/cell-level control plane, user face.
The present invention realizes the removing to high-speed rail user using the magnanimity communication data of user in high-speed rail, can analyze user's reality
Border perceived quality, formulates prioritization scheme and verifies effect of optimization quick Network Search problem, completes the signaling number to high-speed rail network
Work is supported according to acquisition and modeling, special analysis, output prioritization scheme and closed-loop process etc., relative to traditional optimization, tool
The advantages such as standby reflection high-speed rail user actual perceived, time-consuming short, access period short, mass data.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (8)
1. a kind of high-speed rail private network cell switches point detecting method, which comprises the following steps:
According to high-speed rail private network cell work parameter evidence, the cell switching sequence of high-speed rail when driving is obtained；
High-speed rail communication user is obtained in the absolute fix coordinate of each high-speed rail private network cell switching point, it is special to calculate each high-speed rail
Net cell switching point is to the distance for cutting out cell base station；
According to the distance and preset first signal intensity attenuation model, the communication user is calculated in each high-speed rail
The received signal strength of private network cell switching point；
The actual measurement received signal strength of the high-speed rail private network cell switching point is obtained, each high-speed rail private network cell switching is calculated
The received signal strength calculated value of point and the actual measurement receive the signal strength difference of signal；
By being fitted iteration, the signal strength difference and the high-speed rail private network cell switching point are obtained to cutting out cell base station
The difference in signal strength of distance-distance correspondence formula；
High-speed rail communication user is obtained in the received signal strength of high-speed rail private network cell switching point to be measured, according to the height to be measured
Received signal strength, preset second signal Strength degradation model and the difference in signal strength-of iron private network cell switching point
Distance correspondence formula calculates the high-speed rail private network cell switching point to be measured to the distance for cutting out cell base station；
According to the position coordinates for cutting out cell base station, the high-speed rail private network cell switching point to be measured to cutting out cell base station
Distance and high-speed rail route position coordinates, calculate the position coordinates of the high-speed rail private network cell switching point to be measured.
2. high-speed rail private network cell according to claim 1 switches point detecting method, which is characterized in that first signal is strong
Spending attenuation model includes:
(1)Lm(d)=46.3+33.9logf-13.82loghte-a(hre)+(44.9-6.55loghte)logd；
Wherein, LmIt (d) is path loss, f is carrier frequency；hteIt is effective height of transmitting antenna；hreIt is that receiving antenna is effectively high
Degree；D is the high-speed rail private network cell switching point to the distance for cutting out cell base station；a(hre) it is portable antenna modifying factor, number
Value are as follows:
a(hre)=(1.1log f-0.7) hre-(1.56log f-0.8)；
(2)PH=PTX+GT-LRS-LCS-Lm(d)；
Wherein, PHFor the received signal strength of the high-speed rail private network cell switching point；PTXFor antenna opening signal strength；GTFor antenna
Gain is equal to transmitter antenna gain (dBi)+receiving antenna gain；LRSFor human body loss；LCSFor car body loss；LmFor path loss.
3. high-speed rail private network cell according to claim 1 switches point detecting method, which is characterized in that the second signal is strong
Spending attenuation model includes:
(2)PH=PTX+GT-LRS-LCS-Lm(d)；
Wherein, PHFor the received signal strength of the high-speed rail private network cell switching point；PTXFor antenna opening signal strength；GTFor antenna
Gain is equal to transmitter antenna gain (dBi)+receiving antenna gain；LRSFor human body loss；LCSFor car body loss；LmFor path loss；
(3)Lm(d)=46.3+33.9logf-13.82loghte-a(hre)+(44.9-6.55loghte)logd+CM；
Wherein, LmIt (d) is path loss, f is carrier frequency；hteIt is effective height of transmitting antenna；hreIt is that receiving antenna is effectively high
Degree；D is the high-speed rail private network cell switching point to the distance for cutting out cell base station；a(hre) it is portable antenna modifying factor, number
Value are as follows:
a(hre)=(1.1log f-0.7) hre-(1.56log f-0.8)；CMFor the reception of the high-speed rail private network cell switching point
Signal strength calculating value and the actual measurement receive the signal strength difference of signal.
4. switching point detecting method to high-speed rail private network cell described in 3 any one according to claim 1, which is characterized in that obtain
Take high-speed rail communication user in the absolute fix coordinate of each high-speed rail private network cell switching point, further comprising the steps of:
Soft according to high-speed rail private network cell adopts XDR signaling data, obtains communication user cutting between each high-speed rail private network cell
It changes a little；
According to the switching point between the high-speed rail private network cell, the communication selected continuously across three or more high-speed rail private network cells is used
Family；
The cell switching sequence of sequence and high-speed rail when driving according to selected communication user Jing Guo the high-speed rail private network cell,
Determine the moving direction of the selected communication user；
Pass through distance between the time and described two switching points of two switching points according to the selected communication user,
Calculate the movement speed of the selected communication user；
The movement speed and preset threshold speed are compared, whether the selected communication user is judged according to comparison result
In high-speed rail.
5. a kind of high-speed rail private network cell switching point detection system characterized by comprising
Switching sequence obtains module, for obtaining the cell of high-speed rail when driving and switching sequence according to high-speed rail private network cell work parameter evidence
Column；
First distance computing module is sat for obtaining high-speed rail communication user in the absolute fix of each high-speed rail private network cell switching point
Mark calculates each high-speed rail private network cell switching point to the distance for cutting out cell base station；
Signal strength calculates module, for according to the distance and preset first signal intensity attenuation model, described in calculating
Received signal strength of the communication user in each high-speed rail private network cell switching point；
Difference in signal strength computing module is calculated for obtaining the actual measurement received signal strength of the high-speed rail private network cell switching point
The received signal strength calculated value of each high-speed rail private network cell switching point and the actual measurement receive the difference in signal strength of signal
Value；
Fitting module, for obtaining the signal strength difference and being arrived with the high-speed rail private network cell switching point by fitting iteration
Cut out difference in signal strength-distance correspondence formula of the distance of cell base station；
Second distance computing module, for obtaining high-speed rail communication user in the reception signal of high-speed rail private network cell switching point to be measured
Intensity, according to received signal strength, the preset second signal strength retrogression mould of the high-speed rail private network cell switching point to be measured
It is small to cutting out to calculate the high-speed rail private network cell switching point to be measured for type and the difference in signal strength-distance correspondence formula
The distance of area base station；
Positions calculations module, for cutting out the position coordinates of cell base station according to, the high-speed rail private network cell to be measured is cut
It changes a little to the position coordinates of the distance and high-speed rail route that cut out cell base station, calculates the high-speed rail private network cell to be measured and cut
Change position coordinates a little.
6. high-speed rail private network cell switching point detection system according to claim 5, which is characterized in that first signal is strong
Spending attenuation model includes:
(1)Lm(d)=46.3+33.9logf-13.82loghte-a(hre)+(44.9-6.55loghte)logd；
Wherein, LmIt (d) is path loss, f is carrier frequency；hteIt is effective height of transmitting antenna；hreIt is that receiving antenna is effectively high
Degree；D is the high-speed rail private network cell switching point to the distance for cutting out cell base station；a(hre) it is portable antenna modifying factor, number
Value are as follows:
a(hre)=(1.1log f-0.7) hre-(1.56log f-0.8)；
(2)PH=PTX+GT-LRS-LCS-Lm(d)；
Wherein, PHFor the received signal strength of the high-speed rail private network cell switching point；PTXFor antenna opening signal strength；GTFor antenna
Gain is equal to transmitter antenna gain (dBi)+receiving antenna gain；LRSFor human body loss；LCSFor car body loss；LmFor path loss.
7. high-speed rail private network cell switching point detection system according to claim 5, which is characterized in that the second signal is strong
Spending attenuation model includes:
(2)PH=PTX+GT-LRS-LCS-Lm(d)；
Wherein, PHFor the received signal strength of the high-speed rail private network cell switching point；PTXFor antenna opening signal strength；GTFor antenna
Gain is equal to transmitter antenna gain (dBi)+receiving antenna gain；LRSFor human body loss；LCSFor car body loss；LmFor path loss；
(3)Lm(d)=46.3+33.9logf-13.82loghte-a(hre)+(44.9-6.55loghte)logd+CM；
Wherein, LmIt (d) is path loss, f is carrier frequency；hteIt is effective height of transmitting antenna；hreIt is that receiving antenna is effectively high
Degree；D is the high-speed rail private network cell switching point to the distance for cutting out cell base station；a(hre) it is portable antenna modifying factor, number
Value are as follows:
a(hre)=(1.1log f-0.7) hre-(1.56log f-0.8)；CMFor the reception of the high-speed rail private network cell switching point
Signal strength calculating value and the actual measurement receive the signal strength difference of signal.
8. according to high-speed rail private network cell switching point detection system described in claim 5 to 7 any one, which is characterized in that also
Including the communication user detection device in high-speed rail, the communication user detection device in the high-speed rail includes:
Switching point obtains module, for adopting XDR signaling data according to the soft of high-speed rail private network cell, obtains communication user each high
Switching point between iron private network cell；
Selecting module, for selecting special continuously across three or more high-speed rails according to the switching point between the high-speed rail private network cell
The communication user of net cell；
Moving direction obtains module, for the sequence and high-speed rail according to selected communication user Jing Guo the high-speed rail private network cell
Cell switching sequence when driving determines the moving direction of the selected communication user；
Speed acquiring module, for passing through the time and described two of two switching points according to the selected communication user
Distance between a switching point calculates the movement speed of the selected communication user；
First judgment module, for the movement speed and preset threshold speed to be compared, judged according to comparison result described in
Whether selected communication user is in high-speed rail.
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| CN109769198B (en) * | 2017-11-09 | 2020-11-20 | 中国移动通信集团福建有限公司 | High-speed rail user positioning method, device, equipment and computer storage medium |
| CN110740482B (en) * | 2018-07-20 | 2021-09-03 | 比亚迪股份有限公司 | Area switching method and device, train access unit and train |
| CN111385731B (en) * | 2018-12-27 | 2021-08-06 | 中国移动通信集团辽宁有限公司 | Train user positioning method, device, equipment and medium |
| CN109885636B (en) * | 2019-02-18 | 2021-04-16 | 中国联合网络通信集团有限公司 | User portrait drawing method and server |
| CN110505665B (en) * | 2019-08-08 | 2021-12-14 | 武汉绿色网络信息服务有限责任公司 | Method and system for switching cell of high-speed rail mobile terminal user |
| CN113329413B (en) * | 2021-04-15 | 2022-04-01 | 清华大学 | Multipath transmission data pre-scheduling method and system for high-speed rail scene |
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