CN106341884A - User location updating method and user location update device - Google Patents
User location updating method and user location update device Download PDFInfo
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- CN106341884A CN106341884A CN201610716188.9A CN201610716188A CN106341884A CN 106341884 A CN106341884 A CN 106341884A CN 201610716188 A CN201610716188 A CN 201610716188A CN 106341884 A CN106341884 A CN 106341884A
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/51—Allocation or scheduling criteria for wireless resources based on terminal or device properties
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Abstract
The invention proposes a user location updating method and a user location update device. The user location updating method comprises the following steps: acquiring user emission signals from a plurality of cells; determining a large-scale decline coefficient, a user geographical location and an azimuth angle corresponding to a sender of each user emission signal according to the user emission signal; and determining a space sub-area where each sender is located in a cell to which the sender belongs according to the large-scale decline coefficient, the user geographical position and the azimuth angle. Through the technical scheme of the invention, the space sub-area where a user is located in a cell to which the user belongs can be determined according to the large-scale decline coefficient, the user geographical position and the azimuth angle, namely, the exact location of the user is acquired, and a pilot frequency can be allocated to the user correctly according to the exact location to enhance the accuracy of channel estimation.
Description
[technical field]
The present invention relates to communication technical field, more particularly, to a kind of method for user position update and a kind of user position update
Device.
[background technology]
At present, the capacity index of the 5th third-generation mobile communication requires to support that bigger user connects number density, higher energy
Efficiency and bigger network capacity, extensive mimo (multiple-input multiple-output, multiple-input, multiple-output) is passed through
Configure large-scale antenna array in base station side, be derived from abundant spatial degrees of freedom, be multiple using identical running time-frequency resource
User provides service, and each user can select to access many antenna elements, can increase user and connect number density, can carry again
Rise energy efficiency and power system capacity.
In order to execute extended receiver detection and downlink transmission precoding, extensive mimo system base-station needs
Know channel condition information.However, in mobile communication application, propagation environment of radio wave is complicated, channel coherency time and available
It is impossible to distribute orthogonal pilot frequency sequences for all users limited by channel width, inter-cell pilot multiplexing is inevitable, neighbor cell
The pilot pollution that pilot frequency multiplexing produces can cause channel estimation bias, and in extensive mimo system, with antenna for base station number
Increase, the impact to precision of channel estimation for the pilot pollution be much larger than white Gaussian noise.
Therefore, how effectively to distribute pilot tone for user, to lift the accuracy of channel estimation, become urgently to be resolved hurrily at present
Technical problem.
[content of the invention]
Embodiments provide a kind of method for user position update and a kind of user position update device it is intended to solve
The technical problem of the channel estimation bias causing because of the pilot pollution of neighboring cell pilot multiplexing generation in correlation technique, can
Determine the space sub-district that user is located in affiliated subdistrict, that is, obtain accurate customer location, effectively distribute pilot tone for user,
To lift the accuracy of channel estimation.
In a first aspect, embodiments providing a kind of method for user position update, comprising: obtain little from several
User's transmission signal in area；According to described user's transmission signal, determine the corresponding big chi of sender of described user's transmission signal
Degree fading coefficients, user geographical position and azimuth；According to described large scale fading coefficients, described user geographical position and described
Azimuth, determines the space sub-district that described sender is located in affiliated subdistrict.
In the above embodiment of the present invention, obtaining before the step of user's transmission signal of several cells, tool
Body includes: each cell is divided into multiple spaces sub-district, wherein, the plurality of space sub-district include a center sub-district and
At least one edge sub-district.
In the above embodiment of the present invention, according to described user's transmission signal, determine the transmission of described user's transmission signal
The corresponding large scale fading coefficients in side, user geographical position and azimuthal step, comprising: entered according to described user's transmission signal
Row wireless location and/or direction of arrival positioning, with determine described user's transmission signal sender corresponding user geographical position,
Scattering object distribution around the communication distance of azimuth, sender and base station and sender；And according to described sender and base
Scattering object distribution around the communication distance stood and described sender, builds propagation model；Institute is estimated by described propagation model
State user's transmission signal corresponding large scale fading coefficients.
In the above embodiment of the present invention, according to described large scale fading coefficients, described user geographical position and described side
Parallactic angle, the step determining the space sub-district that described sender is located in affiliated subdistrict, specifically include: judge that described large scale declines
Whether the coefficient that falls is more than threshold value；When judged result is to be, determine that described sender is located at the center sub-district of affiliated subdistrict；When
When described judged result is no, according to described user geographical position and described azimuth, described in affiliated subdistrict at least one
The space sub-district that described sender is located at is determined in edge sub-district.
In the above embodiment of the present invention, before judging described large scale fading coefficients whether more than the step of predetermined value,
Also include: obtain number of users and the system architecture coefficient of described affiliated subdistrict；According to described number of users and described system architecture system
Number, calculates described threshold value.
Second aspect, embodiments provides a kind of user position update device, comprising: transmission signal obtains single
Unit, obtains the user's transmission signal from several cells；Sender's parameter acquiring unit, according to described user's transmission signal,
Determine sender's corresponding large scale fading coefficients, user geographical position and the azimuth of described user's transmission signal；Space
Area's determining unit, according to described large scale fading coefficients, described user geographical position and described azimuth, determines described sender
The space sub-district being located in affiliated subdistrict.
In the above embodiment of the present invention, also include: space sub-area division unit, obtains in described transmission signal acquiring unit
Fetch from before user's transmission signal of several cells, each cell is divided into multiple spaces sub-district, wherein, the plurality of
Space sub-district includes a center sub-district and at least one edge sub-district.
In the above embodiment of the present invention, described sender parameter acquiring unit includes: positioning unit, according to described user
Transmission signal carries out wireless location and/or direction of arrival positioning, to determine the corresponding use of sender of described user's transmission signal
Scattering object distribution around the communication distance of family geographical position, azimuth, sender and base station and sender；And propagation model
Construction unit, the scattering object distribution around the communication distance according to described sender and base station and described sender, build and propagate
Model；Coefficient estimate unit, estimates the corresponding large scale fading coefficients of described user's transmission signal by described propagation model.
In the above embodiment of the present invention, described space sub-district determining unit specifically for: judge the decline of described large scale
Whether coefficient is more than threshold value, wherein, when judged result is to be, determines that described sender is located at the middle center of affiliated subdistrict
Area, when described judged result is no, according to described user geographical position and described azimuth, described in affiliated subdistrict at least
The space sub-district that described sender is located at is determined in one edge sub-district.
In the above embodiment of the present invention, also include: threshold value computing unit, judge in described space sub-district determining unit
Whether described large scale fading coefficients are more than number of users and the system architecture system before described predetermined value, obtaining described affiliated subdistrict
Number, and according to described number of users and described system architecture coefficient, calculate described threshold value.
The third aspect, embodiments provides a kind of base station, including the user any one of above-described embodiment
Location updating device, therefore, this base station has and the user position update device identical any one of above-described embodiment
Technique effect, will not be described here.
By above technical scheme, cause because of the pilot pollution of neighboring cell pilot multiplexing generation in correlation technique
Channel estimation bias technical problem, user can be determined according to large scale fading coefficients, user geographical position and azimuth
The space sub-district being located in affiliated subdistrict, that is, obtain the exact position of user, and being easy to according to exact position is correctly user
Carry out pilot tone distribution, to lift the accuracy of channel estimation.
[brief description]
In order to be illustrated more clearly that technical scheme provided in an embodiment of the present invention, below will be to use required in embodiment
Accompanying drawing be briefly described it should be apparent that, drawings in the following description are only some embodiments of the present invention, for this
For the those of ordinary skill of field, without having to pay creative labor, other can also be obtained according to these accompanying drawings
Accompanying drawing.
The flow chart that Fig. 1 shows the method for user position update providing according to one embodiment of present invention；
The flow chart that Fig. 2 shows the method for user position update providing according to another embodiment of the invention；
The flow chart that Fig. 3 shows the communication control method providing according to one embodiment of present invention；
Fig. 4 shows the block diagram of the user position update device providing according to one embodiment of present invention；
Fig. 5 shows the user location distribution figure providing according to one embodiment of present invention；
Fig. 6 shows the space sub-district scattergram providing according to one embodiment of present invention；
Fig. 7 shows the block diagram of the base station providing according to one embodiment of present invention.
[specific embodiment]
In order to be better understood from technical scheme, below in conjunction with the accompanying drawings the embodiment of the present invention is retouched in detail
State.
It will be appreciated that described embodiment is only a part of embodiment of the present invention, rather than whole embodiment.Base
Embodiment in the present invention, those of ordinary skill in the art obtained under the premise of not making creative work all its
Its embodiment, broadly falls into the scope of protection of the invention.
The term using in embodiments of the present invention is the purpose only providing merely for description specific embodiment, and is not intended to
Limit the present invention." a kind of ", " described " of singulative used in the embodiment of the present invention and appended claims and
" being somebody's turn to do " is also intended to including most forms, unless context clearly shows that other implications.
It should be appreciated that term "and/or" used herein is only a kind of incidence relation of description affiliated partner, represent
There may be three kinds of relations, for example, a and/or b, can represent: individualism a, there is a and b simultaneously, individualism b these three
Situation.In addition, character "/" herein, typically represent forward-backward correlation to as if a kind of relation of "or".
Depending on linguistic context, word as used in this " if " can be construed to " ... when " or " when ...
When " or " in response to determining " or " in response to detection ".Similarly, depending on linguistic context, phrase " if it is determined that " or " if detection
(condition of statement or event) " can be construed to " when determining " or " in response to determining " or " when the detection (condition of statement
Or event) when " or " in response to detecting (condition of statement or event) ".
The flow chart that Fig. 1 shows the method for user position update providing according to one embodiment of present invention.
As shown in figure 1, the method for user position update providing according to one embodiment of present invention, comprising:
Step 102, obtains the user's transmission signal from several cells.
In each cell, there are one or more users, that is, one or more sender, can be received by base station
User's transmission signal from each user.
Step 104, according to user's transmission signal, determines sender's corresponding large scale decline system of user's transmission signal
Number, user geographical position and azimuth.
Step 106, according to large scale fading coefficients, user geographical position and azimuth, determines sender in affiliated subdistrict
The space sub-district at middle place.
Geographical position due to different user changes at random, by scattering object distribution influence, the propagation that different user shows
Feature has differences, and each space sub-district equivalent user number changes over.For avoiding causing not in time because of user position update
The problem of the pilot pollution aggravation producing in inter-cell pilot multiplex process, can be by large scale fading coefficients, user ground
Reason position and azimuth three attribute combine, and determine which space sub-district sender belongs in its cell, that is, determine user
Accurate location such that it is able to pilot tone distribution correctly be carried out for user according to the accurate location of user, to lift channel estimation
Accuracy.
The flow chart that Fig. 2 shows the method for user position update providing according to another embodiment of the invention.
As shown in Fig. 2 the method for user position update providing according to another embodiment of the invention, comprising:
Step 202, each cell is divided into multiple spaces sub-district, and wherein, multiple spaces sub-district includes a center
Sub-district and at least one edge sub-district.
Cell is divided into multiple spaces sub-district, is equivalent to and finer division has been carried out to the scope residing for user,
The user's physical location finally giving can be made more accurate.
Step 204, obtains the user's transmission signal from several cells.
Wherein, in each cell, there are one or more users, that is, one or more sender, permissible by base station
Receive the user's transmission signal from each user.
Step 206, carries out wireless location and/or direction of arrival positioning according to user's transmission signal, to determine user's transmitting
Dissipating around the sender corresponding user geographical position of signal, the communication distance at azimuth, sender and base station and sender
Beam is distributed.
Step 208, the scattering object distribution around the communication distance according to sender and base station and sender, build propagating mode
Type.
Step 210, estimates user's transmission signal corresponding large scale fading coefficients by propagation model.
Step 212, obtains number of users and the system architecture coefficient of affiliated subdistrict.
Step 214, according to number of users and system architecture coefficient, calculates threshold value.
Thus, it is possible to according to practical situation real-time adjustment large scale fading coefficients.The size of corresponding threshold value, thus enter
One step lifts the correctness of customer location, effectively distributes pilot tone, the accuracy of lifting channel estimation for user.
Step 216, judges whether large scale fading coefficients are more than threshold value, wherein, when judged result is to be, enters step
Rapid 218, when judged result for no when, enter step 220.
Step 218, determines that sender is located at the center sub-district of affiliated subdistrict.
Step 220, according to user geographical position and azimuth, determines at least one edge sub-district of affiliated subdistrict and sends out
Send orientation in space sub-district.
Wherein, judge which space sub-district user i.e. sender are located at one by one, can first judge whether positioned at affiliated
The center sub-district of cell, then judge whether the edge sub-district positioned at affiliated subdistrict, or can also first judge whether positioned at affiliated
The edge sub-district of cell, then judge whether the center sub-district positioned at affiliated subdistrict, specific judgement order can by base station according to
Practical situation actively sets.
In the above embodiment of the present invention, the geographical position due to different user changes at random, is distributed shadow by scattering object
Ring, the propagation characteristic that different user shows has differences, and each space sub-district equivalent user number changes over.For avoid because with
Family location updating causes the problem that the pilot pollution producing in inter-cell pilot multiplex process aggravates not in time, can pass through
Large scale fading coefficients, user geographical position and azimuth three attribute combine, and determine which sender belongs in its cell
Individual space sub-district, that is, determine the accurate location of user such that it is able to correctly be led for user according to the accurate location of user
Frequency division is joined, to lift the accuracy of channel estimation.
The flow chart that Fig. 3 shows the communication control method providing according to one embodiment of present invention.
As shown in figure 3, the communication control method providing according to one embodiment of present invention, comprising:
Step 302, inputs cellular cell number l, community user number k.
Step 304, estimates parameter(x, y, z)；
Step 306, adjacent base station interactive information(x, y, z)；
Step 308, calculates γth1、γth2、Setting δ, r, t.
Step 310, judges whetherWhen judged result is to be, enter step 312, when judged result is no
When, enter step 316.
Step 312, determines that customer location is positioned at center sub-district cc.
Step 314, center sub-district user distribution orthogonal guide frequency and the multiplexing of all cellular cells.
Step 316, judges user is located at which edge sub-district of uu, ru, rd, dd, ld or lu, and specifically, base station is using this
Geographical position (the x of community user kk, yk, zk) and azimuthJudge user positioned at which edge sub-district according to following criterion:
Step 318, constructs potential pilot pollution figure, initializes { plk, ω=0.
Step 320, judges that whether unallocated pilot tone user is equal to 0, when judged result is to be, enters step 322, when sentencing
When disconnected result is no, enter step 324.
Step 322, output edge sub-district user's pilot tone allocation result.
Step 324, carries out user's selection.
Step 326, generates patterns available collection λ.
Step 328, carries out pilot tone selection.
Step 330, carries out pilot tone distribution.
Below more specific elaboration is carried out to above-described embodiment.
Multiple cell multi-user extensive mimo system structure includes l hexagonal honeycomb cell, and each cell base station is all joined
Put Macroscale homogenous face battle array, provide service for k single-antenna subscriber.Uniform surface battle array is made up of a row and b row, and array element distance is
(dx, dy), a row b array unit index is designated as:
M=a+a (b-1)
Wherein, 1≤a≤a, 1≤b≤b, 1≤m≤m, m are the total array numbers of antenna for base station, such as m=512, a=16, b=
32.
So, the multiple cell multi-user extensive mimo system pilot allocation algorithm based on user's space subregion is by following step
Suddenly carry out:
Step 1, parameter estimation.
The transmission signal intensity from this cell and neighbor cell user for the measurement is passed through in base station, big based on propagation model estimation
Yardstick fading coefficients, propagation model builds according to scattering object distribution around the communication distance between user and base station and user, base
Station utilizes receipt signal, estimates to obtain this using wireless location and doa (direction of arrival, direction of arrival positions)
The geographical position of honeycomb residence user and azimuth.
In the l of cellular cell, the large scale fading coefficients of user k to cellular cell l ' base station are
Wherein, r is cellular cell radius, and such as setting r is 500m, and α is path loss exponent, such as selects α position 3, γLk, l 'For
Honeycomb small family k is to the distance of cellular cell l ' base station, zLk, l 'The shadow fading factor, such as arranging its standard deviation is 8db.
Using the user terminal location technology of current cellular mobile communication networks main flow with realize unit, such as strong based on signal
Spend, set up the equation group containing user terminal geographical coordinate based on angle of arrival, based on information such as fingerprints, using trigonometry or hyperbolic
Collimation method resolves and obtains user geographical position (xk, yk, zk)；
Base station utilizes large-scale antenna array to receive the multiple user's transmission signals being derived from different azimuth, and execution music calculates
Method etc. obtains the arrival bearing angle of each user
Step 2, space sub-area division.
Base station executes space sub-area division in units of hexagonal honeycomb cell, sub-district cc, edge sub-district centered on division
Ru, rd, dd, ld and lu totally 7 space sub-districts, because user moves, the geographical position of different user changes at random, by scattering object
Distribution influence, the propagation characteristic that different user shows has differences, and each space sub-district equivalent user number changes over.
Step 3, user's space sub-district judges, i.e. the large scale fading coefficients of this community user of base station, geographical position and side
Parallactic angle judges which space sub-district user is located at.
Specifically, whether user is located at center sub-district cc, declines according to the large scale of user k in cell l to cell l base station
CoefficientJudge whether user is located at center sub-district cc, ifJudge that user is located at center sub-district, thresholding γth1
It is set to:
Wherein k is the number of users in certain cell, such as setting k=8-10, parameter 0≤δ≤1, is adjusted according to system architecture,
As arranged δ=0.05-0.1, otherwise, judge user is located at which edge sub-district of uu, ru, rd, dd, ld or lu.
Base station utilizes the geographical position (x of this community user kk, yk, zk) and azimuthJudge user according to following criterion
Positioned at which edge sub-district:
Step 4, carries out pilot tone distribution, builds the potential of user between Intra-cell user and neighbor cell based on graph theory
Pilot pollution figure, distributes pilot tone using greedy algorithm.
Wherein, carry out potential pilot pollution figure first to build, use ηLk, l ' k 'Represent different districts (l ≠ l ') different user k
Potential pilot pollution intensity and k ' between is:
Wherein,Cell l ' in user k ' arrive cell l base station large scale fading coefficients, ηLk, l ' k 'Bigger, table
Show that pilot pollution is more serious, use thresholding γth2Evaluate different districts two users can multiplexed pilot, generate a binary system
Potential pilot pollution matrix b, its matrix element is:
Potential pilot pollution figure g (ν, ε) is built based on b, vertex set ν is user, line set ε is that there is potential pilot tone dirt
Dye user between line, with cell, all users are interconnected to form side, if potential pilot pollution be more than thresholding γth2,
Different districts user also forms side to being connected with each other.
By ηLk, l ' k 'Maximum and minima as γth2Bound it may be assumed that
γth2∈[ηmin, ηmax]
Near-optimization threshold value is found using iterative mesh search method, then:
γth2=figs([ηmin, ηmax], r, t)
Wherein, r is the grid number of each search, and t is searching times, and such as r=20, t=2, by [η when searching for for the first timemin,
ηmax] uniform sampling is f point, such as f=20, reduces interval range successively, search obtains near-optimization threshold value γ after terminatingth2.
Then, carry out pilot tone distribution, the vertex coloring being potential pilot pollution figure using minimum number of colours c, connectionless side
Summit same color, have summit different colours connecting side, such as c=3, as any exist connect the user on side to point
Join orthogonal guide frequency, to suppress pilot pollution, input as network parameter: cell number l, number of users k and γth2, βLk, l, such as l=
19, k=10, it is output as pilot tone allocation result { plk}.
Specifically, carrying out pilot tone distribution needs to initialize { p firstlk}=0, set ω is to distribute pilot tone user, initially
For sky, ω=0, according to γth2,Calculate binary system potential pilot pollution matrix b, determine that cycling condition is at least one
Pilot tone that user is also unallocated, sequentially distributes pilot tone for user, then carries out user's selection.
Because the more interference in side that potential pilot pollution in figure summit connects are more serious, select at most to connect sides and unallocated
The user of pilot tone.
Determine patterns available collection, wherein, be not multiplexed with district pilots, in cell l, unallocated pilot tone constitutes the available of user k
Pilot set λ.
Carry out pilot tone selection, select the minimum pilot tone of multiplexing number to distribute to user from the patterns available collection λ of user k
k.
Carry out pilot tone distribution, selected pilot tone is distributed to selected user by circulation every time, and this user is added set ω, returns
Return and determine cycling condition, repeat above-mentioned steps, until all with having distributed pilot tone per family.
Fig. 4 shows the block diagram of the user position update device providing according to one embodiment of present invention.
As shown in figure 4, the user position update device 400 providing according to one embodiment of present invention, comprising: transmitting letter
Number acquiring unit 402, sender's parameter acquiring unit 404 and space sub-district determining unit 406.
Transmission signal acquiring unit 402 is used for obtaining the user's transmission signal from several cells；Sender's parameter obtains
Take unit 404 for according to user's transmission signal, determining sender's corresponding large scale fading coefficients, the use of user's transmission signal
Family geographical position and azimuth；Space sub-district determining unit 406 is used for according to large scale fading coefficients, user geographical position and side
Parallactic angle, determines the space sub-district that sender is located in affiliated subdistrict.
Specific user location distribution as shown in figure 5, wherein, has one or more users in each cell, that is,
One or more senders, can receive the user's transmission signal from each user by base station.
Geographical position due to different user changes at random, by scattering object distribution influence, the propagation that different user shows
Feature has differences, and each space sub-district equivalent user number changes over.For avoiding causing not in time because of user position update
The problem of the pilot pollution aggravation producing in inter-cell pilot multiplex process, can be by large scale fading coefficients, user ground
Reason position and azimuth three attribute combine, and determine which space sub-district sender belongs in its cell, that is, determine user
Accurate location such that it is able to pilot tone distribution correctly be carried out for user according to the accurate location of user, to lift channel estimation
Accuracy.
In the above embodiment of the present invention, also include: space sub-area division unit 408, obtains in transmission signal acquiring unit
Fetch from before user's transmission signal of several cells, each cell is divided into multiple spaces sub-district, wherein, multiple spaces
Sub-district includes a center sub-district and at least one edge sub-district.
For example, each base station is executed space sub-area division in units of hexagonal honeycomb cell, sub-district cc centered on division,
Edge sub-district ru, rd, dd, ld and lu totally 7 space sub-districts it becomes possible to form space sub-district scattergram as shown in Figure 6.
In the above embodiment of the present invention, sender's parameter acquiring unit 404 includes: positioning unit 4042, according to user
Transmission signal carries out wireless location and/or direction of arrival positioning, with the sender corresponding user ground determining user's transmission signal
Scattering object distribution around reason position, the communication distance at azimuth, sender and base station and sender；And propagation model builds
Unit 4044, the scattering object distribution around the communication distance according to sender and base station and sender, build propagation model；Coefficient
Evaluation unit 4046, estimates user's transmission signal corresponding large scale fading coefficients by propagation model.
In the above embodiment of the present invention, space sub-district determining unit 406 specifically for: judge that large scale fading coefficients are
No wherein, when judged result is to be, determine that sender is located at the center sub-district of affiliated subdistrict more than threshold value, when judging knot
When fruit is no, according to user geographical position and azimuth, determine at least one edge sub-district of affiliated subdistrict and send orientation
In space sub-district.
Wherein, judge which space sub-district user i.e. sender are located at one by one, can first judge whether positioned at affiliated
The center sub-district of cell, then judge whether the edge sub-district positioned at affiliated subdistrict, or can also first judge whether positioned at affiliated
The edge sub-district of cell, then judge whether the center sub-district positioned at affiliated subdistrict, specific judgement order can by base station according to
Practical situation actively sets.
In the above embodiment of the present invention, also include: threshold value computing unit 410, judge in space sub-district determining unit
Large scale fading coefficients whether more than number of users and the system architecture coefficient before predetermined value, obtaining affiliated subdistrict, and according to
Amount and system architecture coefficient, calculate threshold value.
Thus, it is possible to according to practical situation real-time adjustment large scale fading coefficients.The size of corresponding threshold value, thus enter
One step lifts the correctness of customer location, effectively distributes pilot tone, the accuracy of lifting channel estimation for user.
Fig. 7 shows the block diagram of the base station providing according to one embodiment of present invention.
As shown in fig. 7, the base station 700 providing according to one embodiment of present invention, including the customer location shown in Fig. 4 more
New equipment 400, therefore, this base station 700 has and the user position update device 400 identical technique effect shown in Fig. 4, here
Repeat no more.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.
It should be noted that involved terminal in the embodiment of the present invention can include but is not limited to personal computer
(personal computer, pc), personal digital assistant (personal digital assistant, pda), wireless handheld
Equipment, panel computer (tablet computer), mobile phone, Mp 3 player, mp4 player etc..
It should be understood that disclosed system, apparatus and method in several embodiments provided by the present invention, permissible
Realize by another way.For example, device embodiment described above is only schematically, for example, described unit
Divide, only a kind of division of logic function, actual can have other dividing mode when realizing, for example, multiple units or group
Part can in conjunction with or be desirably integrated into another system, or some features can be ignored, or does not execute.Another, shown
Or the coupling each other that discusses or direct-coupling or communication connection can be by some interfaces, device or unit indirect
Coupling or communication connection, can be electrical, mechanical or other forms.
In addition, can be integrated in a processing unit in each functional unit in each embodiment of the present invention it is also possible to
It is that unit is individually physically present it is also possible to two or more units are integrated in a unit.Above-mentioned integrated list
Unit both can be to be realized in the form of hardware, it would however also be possible to employ the form that hardware adds SFU software functional unit is realized.
The above-mentioned integrated unit realized in the form of SFU software functional unit, can be stored in an embodied on computer readable and deposit
In storage media.Above-mentioned SFU software functional unit is stored in a storage medium, including some instructions with so that a computer
Device (can be personal computer, server, or network equipment etc.) or processor (processor) execution the present invention each
The part steps of embodiment methods described.And aforesaid storage medium includes: u disk, portable hard drive, read only memory (read-
Only memory, rom), random access memory (random access memory, ram), magnetic disc or CD etc. various
Can be with the medium of store program codes.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvement done etc., should be included within the scope of protection of the invention.
Claims (10)
1. a kind of method for user position update is it is characterised in that include:
Obtain the user's transmission signal from several cells；
According to described user's transmission signal, determine sender's corresponding large scale fading coefficients, the use of described user's transmission signal
Family geographical position and azimuth；
According to described large scale fading coefficients, described user geographical position and described azimuth, determine described sender affiliated
The space sub-district being located in cell.
2. method for user position update according to claim 1 is it is characterised in that obtaining the use from several cells
Before the step of family transmission signal, specifically include:
Each cell is divided into multiple spaces sub-district, wherein, the plurality of space sub-district includes a center sub-district and extremely
A few edge sub-district.
3. method for user position update according to claim 2 is it is characterised in that according to described user's transmission signal, really
Sender's corresponding large scale fading coefficients of fixed described user's transmission signal, user geographical position and azimuthal step, bag
Include:
Wireless location and/or direction of arrival positioning are carried out according to described user's transmission signal, to determine described user's transmission signal
Sender corresponding user geographical position, the scattering object around the communication distance at azimuth, sender and base station and sender
Distribution；And
Scattering object distribution around communication distance according to described sender and base station and described sender, builds propagation model；
The corresponding large scale fading coefficients of described user's transmission signal are estimated by described propagation model.
4. the method for user position update according to Claims 2 or 3 is it is characterised in that according to the decline of described large scale be
Several, described user geographical position and described azimuth, determine the step of the space sub-district that described sender is located in affiliated subdistrict
Suddenly, specifically include:
Judge whether described large scale fading coefficients are more than threshold value；
When judged result is to be, determine that described sender is located at the center sub-district of affiliated subdistrict；
When described judged result is no, according to described user geographical position and described azimuth, described in affiliated subdistrict extremely
Determine, in a few edge sub-district, the space sub-district that described sender is located at.
5. method for user position update according to claim 4 is it is characterised in that judge that described large scale fading coefficients are
No more than the step of predetermined value before, also include:
Obtain number of users and the system architecture coefficient of described affiliated subdistrict；
According to described number of users and described system architecture coefficient, calculate described threshold value.
6. a kind of user position update device is it is characterised in that include:
Transmission signal acquiring unit, obtains the user's transmission signal from several cells；
Sender's parameter acquiring unit, according to described user's transmission signal, determines that the sender of described user's transmission signal corresponds to
Large scale fading coefficients, user geographical position and azimuth；
Space sub-district determining unit, according to described large scale fading coefficients, described user geographical position and described azimuth, determines
The space sub-district that described sender is located in affiliated subdistrict.
7. user position update device according to claim 6 is it is characterised in that also include:
Space sub-area division unit, described transmission signal acquiring unit obtain from several cells user's transmission signal it
Before, each cell is divided into multiple spaces sub-district, wherein, the plurality of space sub-district includes a center sub-district and at least
One edge sub-district.
8. user position update device according to claim 7 is it is characterised in that described sender parameter acquiring unit bag
Include:
Positioning unit, carries out wireless location and/or direction of arrival positioning according to described user's transmission signal, to determine described user
Around the sender corresponding user geographical position of transmission signal, the communication distance at azimuth, sender and base station and sender
Scattering object distribution；And
Propagation model construction unit, the scattering object around the communication distance according to described sender and base station and described sender divides
Cloth, builds propagation model；
Coefficient estimate unit, estimates the corresponding large scale fading coefficients of described user's transmission signal by described propagation model.
9. the user position update device according to claim 7 or 8 is it is characterised in that described space sub-district determining unit
Specifically for:
Judge whether described large scale fading coefficients are more than threshold value, wherein, when judged result is to be, determine described sender
Positioned at the center sub-district of affiliated subdistrict, when described judged result is no, according to described user geographical position and described azimuth,
The space sub-district that described sender is located at is determined at least one edge sub-district described in affiliated subdistrict.
10. user position update device according to claim 9 is it is characterised in that also include:
Whether threshold value computing unit, judge described large scale fading coefficients more than described pre- in described space sub-district determining unit
Before definite value, obtain number of users and the system architecture coefficient of described affiliated subdistrict, and according to described number of users and described system tray
Structure coefficient, calculates described threshold value.
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