CN104486729A - Method and device for selecting measurement AP (Access Point) in RTT (Radio Transfers Technology) measurement location system - Google Patents
Method and device for selecting measurement AP (Access Point) in RTT (Radio Transfers Technology) measurement location system Download PDFInfo
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Abstract
The invention discloses a method and a device for selecting a measurement AP (Access Point) in an RTT (Radio Transfers Technology) measurement location system. The method comprises the following steps of acquiring coordinate information of each AP in a network and coordinate information of a terminal to be located; confirming the distance between each AP and the terminal to be located; selecting N APs nearest to the terminal to be located according to the distance, wherein N is not less than Nmin, and the value of Nmin is confirmed according to the location requirement; when N is larger than Nmax, selecting the APs with different channels as the measurement APs from N APs according to the distance from near to far, wherein the total amount of the channels in the network is not less than Nmin, the APs are uniformly distributed according to the channels, and adjacent APs are in different channels. By applying the embodiment of the invention, the measurement efficiency can be improved, and the resource consumption is reduced.
Description
Technical field
The present invention relates to communication technical field, particularly relate to the measurement AP system of selection in a kind of RTT measurement and positioning system and device.
Background technology
Along with the application of mobile Internet and large data, the indoor positioning technologies based on wlan network is more and more very powerful and exceedingly arrogant, has bright application prospect in numerous industries such as retail, hotel, traffic, medical treatment.
Traditional WLAN location technology depends on RSSI signal strength signal intensity, and concrete can be divided into again two kinds of methods below: the triangulation location based on Signal transmissions model and the fingerprint characteristic method based on signal sampling.Due to the impact of the factors such as indoor multipath effect, barrier, RSSI value is very unstable, causes positioning result unreliable based on RSSI value.And the navigation system of a new generation is based on the so-called RTT time, relies on the invariable characteristic of the speed of electromagnetic transmission, overcome the defect of traditional RSSI navigation system, achieve more high accuracy, more stable locating effect.
So-called RTT Active measuring localization method refers to so a kind of positioning means: initiatively send message based on AP and the measurement behavior carried out, namely, sent NULLdata message to terminal (STA) to be measured by the AP of network side, received and respond ACK message, draw the measurement results such as two-way time, and and then calculate the distance of AP and terminal.
Based in the passive type navigation system of RSSI value, server only needs all data of passive reception and from wherein choosing the stronger data of signal.And RTT proactive system needs to determine by which AP to be gone to send location survey message.The simplest method of one, all AP in yes default network participate in measuring actions.For very small-scale network, this is feasible.But in large-scale network, then there is the problems such as efficiency is not high, resource consumption is large in this method.Therefore, how to select to measure AP in RTT measurement and positioning system, measuring efficiency to improve, reduce resource consumption, is the current technical issues that need to address.
Summary of the invention
In view of this, the present invention proposes the measurement AP system of selection in a kind of RTT measurement and positioning system and device, can improve and measure efficiency, reduction resource consumption.
The technical scheme that the present invention proposes is:
A measurement AP system of selection in RTT measurement and positioning system, the method comprises:
Obtain the coordinate information of each AP and the coordinate information of terminal to be positioned in network, the distance of each AP and terminal to be positioned is determined according to described coordinate information, select from the nearest N number of AP of described terminal to be positioned according to described distance, wherein, N is not less than Nmin, and the value of described Nmin is determined according to positioning requirements;
When N is greater than Nmax, from described N number of AP, according to distance from closely to far, select the different AP of channel as measurement AP;
Wherein, the total number of channels in network is not less than Nmin, and each AP is uniformly distributed according to channel, and adjacent AP is different channel.
A measurement AP choice device in RTT measurement and positioning system, this device comprises distance determination module, roughly selects module and selected module;
Described distance determination module, for the coordinate information of the coordinate information and terminal to be positioned that obtain each AP in network, determines the distance of each AP and terminal to be positioned according to described coordinate information;
Describedly roughly select module, for selecting according to described distance from the nearest N number of AP of described terminal to be positioned, wherein, N is not less than Nmin, and the value of described Nmin is determined according to positioning requirements;
Described selected module, for when N is greater than Nmax, from described N number of AP, according to distance from closely to far, selects the different AP of channel as measurement AP;
Wherein, the total number of channels in network is not less than Nmin, and each AP is uniformly distributed according to channel, and adjacent AP is different channel.
As seen from the above technical solution, in the embodiment of the present invention, the AP in network is disposed and combines with the system of selection of measuring AP, selection result is made to meet positioning requirements, and too much AP can also be avoided to participate in measuring, thus improve measurement efficiency, reduction resource consumption, particularly:
When network design, the total number of channels in network is not less than N
min, each AP is uniformly distributed according to channel, and adjacent AP is different channel, wherein, and described N
minvalue determine according to positioning requirements.By above-mentioned network design, make, in the particular range in network centered by any point, all can include N
minthe AP that individual channel is different.
Based on above-mentioned network design, when selecting to measure AP, according to the distance of each AP and terminal to be positioned in network, select from the nearest N number of AP of described terminal to be positioned, wherein, the value of N is not less than N
min, in order to avoid the wasting of resources, the number of the measurement AP finally selected also should be not more than upper limit threshold N
maxbut, iff selecting according to distance to measure AP, may occur that the measurement AP number initially selected is less than N
minbut, increase distance further and the measurement AP number selected can be caused to be greater than N again
max, now, in embodiments of the present invention, from the N number of AP selected, according to distance from closely to far, select the different AP of channel as measurement AP, because the AP of each channel evenly disposes, therefore, from being greater than N when network design
maxn number of AP in one be elected to few N surely
minthe different AP of individual channel is as measurement AP, and, because AP evenly disposes and channel is different, the measurement AP that can select to ensure the method is on the one hand relatively uniform to be distributed in around terminal to be measured, can ensure that RTT measurement effect is best, on the other hand, because channel is different, interference between each measurement AP is also less, and the success rate of measurement is also higher, thus can ensure to realize better locating effect.
Visible, combine with the system of selection of measuring AP by the AP in network is disposed, make the measurement AP selected to meet positioning requirements, and better locating effect can also be obtained, avoid too much AP to participate in measuring, improve and measure efficiency, reduction resource consumption.
Accompanying drawing explanation
Fig. 1 is the measurement AP system of selection flow chart in the RTT measurement and positioning system that provides of the embodiment of the present invention.
Fig. 2 is that the first network that the embodiment of the present invention provides disposes schematic diagram.
Fig. 3 is that the second network that the embodiment of the present invention provides disposes schematic diagram.
Fig. 4 is the network diagram based on mesh coordinate that the embodiment of the present invention provides.
Fig. 5 is that the measurement AP based on mesh coordinate that the embodiment of the present invention provides selects schematic diagram.
Fig. 6 is the detail flowchart of the measurement AP system of selection that the embodiment of the present invention provides.
Fig. 7 is the hardware configuration connection layout that the embodiment of the present invention measures server.
Fig. 8 is the measurement AP choice device structural representation in the RTT measurement and positioning system that provides of the embodiment of the present invention.
Embodiment
In scheme 1, static region system of selection is adopted to select to measure AP, namely, for the measured terminal (STA) in some regions, AP in respective regions participates in RTT measurement as measuring AP, and such as, application scenarios is indoor multilayer building, each floor can be considered as a region, the RTT that the AP in same floor participates in each terminal in this floor measures.
Scheme 1 makes the AP quantity simultaneously participating in measuring be minimized by zoning, thus also reduces the consumption of interface-free resources.But still there is the problem that resource consumption is excessive, efficiency is not high in scheme 1.Such as, in order to reach good measurement effect, the regional choice of scheme 1 generally all can cover the scope of terminal, makes terminal near any point, have AP to measure, the regional choice of scheme 1 will be caused so still bigger than normal, and then cause the consumption of interface-free resources bigger than normal.
Scheme 2 adopts dynamic area system of selection to select to measure AP, that is, one group is selected to measure AP according to the physical location of terminal to be positioned, usually, adopting distance between terminal to be positioned and AP as criterion, the distance with terminal to be positioned being less than the AP of predetermined value all as measuring AP.The feature of scheme 2 is the selections of measuring AP group is dynamic, and what is called dynamically refers to: different STA may correspond to different measurement AP groups, change along with the time, and same STA may correspond to different measurement AP groups.
Although scheme 2 solves the problem mentioned in scheme 1, in scheme 2, if distance radius is bigger than normal, then the measurement AP quantity selected is more, causes the wasting of resources, if distance radius is less than normal, then the measurement AP negligible amounts selected, affects locating effect.
Therefore, how under the prerequisite ensureing locating effect, avoiding the wasting of resources, is the technical problem that the present invention will solve further.
In the embodiment of the present invention, AP in network is disposed and combines with the system of selection of measuring AP, make selection result to meet positioning requirements, and too much AP can also be avoided to participate in measuring, thus improve measurement efficiency, reduction resource consumption, be described in detail below in conjunction with accompanying drawing.
Fig. 1 is the measurement AP system of selection flow chart in the RTT measurement and positioning system that provides of the embodiment of the present invention.
As shown in Figure 1, this flow process comprises:
Step 101, in advance according to adjacent AP be different channel, each AP to be uniformly distributed according to channel and to carry out network design, wherein, the total number of channels in network is not less than Nmin, and the value of described Nmin is determined according to positioning requirements.
This step is the network design stage, once arrange net, when AP is measured in each selection, directly performs from step 102.
Step 102, obtains the coordinate information of each AP and the coordinate information of terminal to be positioned in network, determines the distance of each AP and terminal to be positioned according to described coordinate information.
In this step, can first according to the distance of each AP and terminal to be positioned in described coordinate information rough estimate network, according to the result of rough estimate, select AP in certain limit near terminal to be positioned, and then the actual range of the AP calculated in this certain limit and described terminal to be positioned.
Step 103, select from the nearest N number of AP of described terminal to be positioned according to described distance, wherein, N is not less than Nmin.
Step 104, judges whether N is greater than Nmax, if so, performs step 105, otherwise, perform step 106.
Step 105, from described N number of AP, according to distance from closely to far, selects the different AP of channel as measurement AP, process ends.
Step 106, using described N number of AP as measurement AP, process ends.
Visible, system of selection needs shown in Fig. 1 combine with the deployment scenario of each AP in network, by rationally disposing each AP in network, make in the particular range in network centered by any point, capital includes the different AP of Nmin channel, thus under the prerequisite ensureing locating effect, too much AP can be avoided to participate in RTT and measure, cause the wasting of resources.
Particularly, when the network planning, the total number of channels in network is not less than Nmin, thus ensures to have Nmin different channel in network at least, and when disposing AP, each AP is uniformly distributed according to channel, and adjacent AP is different channel.Wherein, each described AP is uniformly distributed according to channel, to refer in the same area that each channel AP meets substantially and is uniformly distributed, and when being not precluded within practice of construction, because the factors such as error, place restriction cause the distribution density of each channel AP, there is some difference.
Fig. 2 is that the first network that the embodiment of the present invention provides disposes schematic diagram.
As shown in Figure 2, the blockage in figure represents AP, and the label of the physical channel that this AP of the digitized representation on blockage limit works, wherein, this label is only for distinguishing different physical channels.As shown in Figure 2, have 6 channels in network, the AP of each channel is uniformly distributed, and wherein, two the AP minimum distances working in same channel are 2 AP spacing, that is, the space isolation between the AP of cochannel is two AP spacing.
Visible, by the network design of Fig. 2, in 2 AP spacing in network centered by any point, capital includes the different AP of 6 channels, adopt 6 AP to carry out RTT location as measurement AP and usually can meet positioning requirements, therefore, if when selecting to measure AP based on the distance with measured terminal, have selected too much AP, such as, have selected 10 AP, then can from each AP initially selected according to distance from the near to the remote AP that selective channel is different as measurement AP, thus the different AP of 6 channels can be selected as measurement AP, therefore, can under the prerequisite ensureing locating effect, avoid too much AP to participate in RTT to measure, cause the wasting of resources.
The overall principle of network design is that in network, channel number can meet positioning requirements, and each AP is uniformly distributed according to channel, and adjacent AP is different channel.As for the channel number, usually relevant with the size, shape etc. of network coverage of actual needs in network.
Such as, see Fig. 2, if network coverage is large stretch of region be communicated with, then in network, the space isolation of deployment 6 channels, cochannel AP is 2 AP spacing altogether, just can realize each AP and be uniformly distributed according to channel, and adjacent AP is different channel.If there are more channels to use, the total number of channels in network also can be greater than 6, and the space isolation of cochannel AP also can be greater than 2 AP spacing.
Again such as, if network coverage is less, or be sleeve configuration etc., usually need the channel of less number, just can realize each AP is uniformly distributed according to channel, and adjacent AP is different channel, specifically can see Fig. 3.
Fig. 3 is that the second network that the embodiment of the present invention provides disposes schematic diagram.
See Fig. 3, network coverage is sleeve configuration, therefore, only needs 5 channels, just can realize each AP and be uniformly distributed according to channel, and adjacent AP is different channel.
See Fig. 1, the measurement AP system of selection that the embodiment of the present invention provides, the distance between each AP and measured terminal in first Network Based, roughly selects out N number of AP, therefore, needs to determine the distance in network between each AP and measured terminal.
Under common application scenarios, if AP and terminal to be positioned are in same floor, the minimum range of vertical direction then between the position disposed of AP and the position of terminal to be positioned is in 2 ~ 3 meters, and this distance is beyond the precision of a lot of WLAN navigation system.Therefore, the such three-dimensional computations of distance of measured terminal and each AP of surrounding, just can be approximated to be a two dimension and calculate, namely AP and measured terminal are in the calculating in same level.
Because each AP and terminal to be positioned have coordinate figure, wherein the coordinate figure of each AP is determined by when carrying out engineering survey under line, if do not move AP, the coordinate figure of AP is exactly definite value, and the coordinate figure of terminal to be positioned gets by line calculates, the coordinate initial value of terminal to be positioned is generally derived by the coordinate figure of the coordinate figure of associated AP, the i.e. AP of this terminal access to be positioned.Therefore, can be determined the distance d of terminal to be positioned and each AP by formula 1, wherein △ x is terminal to be positioned and the AP coordinate difference in X-direction, and △ y is the coordinate difference in Y direction.
By calculating the value of the distance d of terminal to be positioned and each AP, suppose that distance radius is d
0, can find out and allly meet d≤d
0the AP of condition.
Each AP being not more than preset value with the distance of terminal to be positioned can be drawn in theory by above-mentioned formula 1, but, because the position of terminal to be positioned changed in the moment, terminal to be positioned among a small circle in coordinate variation needs can be caused again to calculate distance according to formula 1, because the calculating of above-mentioned formula 1 relates to extracting operation, therefore, determine that the distance of each AP and terminal to be positioned exists the problem that expense is comparatively large, efficiency is not high according to formula 1.
The technical problem comparatively large for above-mentioned distance computing cost, efficiency is not high, the embodiment of the present invention also proposes a kind of AP system of selection based on mesh coordinate, can reduce computing cost, raise the efficiency, obtain higher systematic function, specifically refer to Fig. 4.
Fig. 4 is the network diagram based on mesh coordinate that the embodiment of the present invention provides.
As shown in Figure 4, the region of the network coverage is divided into the identical grid of size in advance, utilize the grid at AP and terminal place to be positioned to identify the position coordinates of AP and terminal to be positioned, when terminal to be positioned is movable in same grid, the coordinate of terminal to be positioned remains unchanged.
Described based in the AP system of selection of mesh coordinate, when determining the distance of each AP and terminal to be positioned, first the relativity shift of the grid at each AP place grid and terminal place to be positioned in network is determined, then the distance of AP and terminal to be positioned is determined according to described relativity shift, therefore, when terminal to be positioned is movable in same grid, can multiplexing before measurement AP selection result, and without the need to the distance that recalculates each AP and terminal to be positioned and then reselect and measure AP.
Visible, by the measurement AP system of selection based on mesh coordinate, can significantly reduce computing cost, raise the efficiency, obtain higher systematic function.
Below in conjunction with Fig. 5, the measurement AP system of selection based on mesh coordinate that the embodiment of the present invention provides is further illustrated.
Fig. 5 is that the measurement AP based on mesh coordinate that the embodiment of the present invention provides selects schematic diagram.
As shown in Figure 5, the triangle in Fig. 5 represents terminal to be positioned, and its coordinate is (5,5), according to the mesh coordinate at each AP place in network, calculates the distance of each AP and this terminal to be positioned.
See Fig. 4, the AP that the distance selecting terminal to be positioned with this according to the distance radius preset is not more than this distance radius is: AP1 ~ AP8, but, for RTT measurement and positioning system, measuring in AP group has 8 AP then to waste resource, if but reduced distance radius, would cause not only AP number in measurement group but also very little.Therefore, the characteristic that the embodiment of the present invention utilizes line lower network to dispose, carries out high-precision selection.That is: from AP1 ~ AP8, choose the different AP of 6 channels, be [AP1, AP2, AP3, AP4, AP5, AP6] in this example, and reject AP7 and AP8 of channel repetition.
Visible, in the embodiment of the present invention, due to being uniformly distributed of AP of each channel in the network design under line, to ensure that around any point in particular range theoretically, capital at least includes the different AP of Nmin channel, thus under the prerequisite ensureing locating effect, too much AP can be avoided to participate in RTT and measure, cause the wasting of resources.
In addition, the embodiment of the present invention is selected to measure AP according to channel, measured message can also be made to be uniformly distributed over a different physical channel, thus avoid distribute too much measured message on certain channel.Therefore, the embodiment of the present invention can also optimize distribution and the utilization of resource.
Based on the such scheme that the embodiment of the present invention provides, provide the detail flowchart measuring AP system of selection in one embodiment, specifically refer to Fig. 6.
Fig. 6 is the detail flowchart of the measurement AP system of selection that the embodiment of the present invention provides.
As shown in Figure 6, this flow process comprises:
Step 601, in network, each AP is uniformly distributed according to channel, and the channel difference between adjacent AP.
This step for providing suitable network design, thus ensures that around any point in particular range, all can include the different AP of Nmin channel, wherein, Nmin determines according to positioning requirements.
Step 602, server obtains the coordinate of each AP in network from configuration file, obtains the coordinate of terminal to be positioned from locating module.
Step 603, based on the distance radius selected, determines the one group of AP being not more than described distance radius with the distance of terminal to be positioned.
In this step, based on the absolute coordinate of AP and terminal to be positioned, the distance of AP and terminal to be positioned can be determined, also can determine the distance of AP and terminal to be positioned based on mesh coordinate.
In this step, can first according to the coordinate (absolute coordinate or mesh coordinate) of AP and terminal to be positioned, estimate roughly AP in certain limit near terminal to be positioned, and then the actual range of the AP calculated in this certain limit and described terminal to be positioned, and then select the one group of AP being not more than described distance radius with the distance of terminal to be positioned according to described actual range.
Step 604, whether the AP number N comprised in the measurement AP group that determining step 603 is selected is less than the threshold value Nmin of positioning requirements, if so, then increases distance radius, and returns step 603, if be not less than Nmin, enter step 605.
Step 605, judges whether the AP number N comprised in the AP group selected is greater than Nmax, if so, enters step 606, otherwise, perform step 607.
Wherein, the value of Nmax should to avoid the wasting of resources for standard, and concrete value is more flexible.
Step 606, from described N number of AP, according to distance from closely to far, selects the different AP of channel as measurement AP, process ends.
Step 607, using described N number of AP as final selection result, namely as the measurement AP finally selected, process ends.
The embodiment of the present invention has following Advantageous Effects:
Combine with the system of selection of measuring AP by the AP in network is disposed, make the measurement AP selected to meet positioning requirements, and too much AP can also be avoided to participate in measuring, thus raising is measured efficiency, reduced resource consumption.
And the embodiment of the present invention is selected to measure AP according to channel, measured message can also be made to be uniformly distributed over a different physical channel, thus avoid distribute too much measured message on certain channel.Therefore, the embodiment of the present invention can also optimize distribution and the utilization of resource.
For said method, the embodiment of the invention also discloses the measurement server in a kind of RTT measurement and positioning system.
Fig. 7 is the hardware configuration connection layout that the embodiment of the present invention measures server.
As shown in Figure 7, this measurement server comprises processor, network interface, internal memory and nonvolatile memory, and above-mentioned each hardware is connected by bus, wherein:
Nonvolatile memory, for store instruction codes; The operation that described instruction code completes when being executed by processor is mainly the function that the measurement AP choice device in internal memory completes.
Processor, for communicating with nonvolatile memory, reading and performing the described instruction code stored in nonvolatile memory, completing the function that above-mentioned measurement AP choice device completes.
Internal memory, the operation completed when the described instruction code in nonvolatile memory is performed is mainly the function that the measurement AP choice device in internal memory completes.
Say from software view, be applied to and measure measurement AP choice device in server as shown in Figure 8.
Fig. 8 is the measurement AP choice device structural representation in the RTT measurement and positioning system that provides of the embodiment of the present invention.
As shown in Figure 8, this measurement AP choice device comprises distance determination module 801, roughly selects module 802 and selected module 803.
Distance determination module 801, for the coordinate information of the coordinate information and terminal to be positioned that obtain each AP in network, determines the distance of each AP and terminal to be positioned according to described coordinate information.
Roughly select module 802, for selecting according to described distance from the nearest N number of AP of described terminal to be positioned, wherein, N is not less than Nmin, and the value of described Nmin is determined according to positioning requirements.
Selected module 803, for when N is greater than Nmax, from described N number of AP, according to distance from closely to far, selects the different AP of channel as measurement AP.
Wherein, the total number of channels in network is not less than Nmin, and each AP is uniformly distributed according to channel, and adjacent AP is different channel.
Roughly select module 803, may be used for when N is not more than Nmax, using described N number of AP as measurement AP.
Wherein, described each AP is uniformly distributed can comprises according to channel: the space isolation between the AP of cochannel is two AP spacing or is greater than two AP spacing.Total number of channels in network can be 6.
In one embodiment, the region of the described network coverage is divided into the identical grid of size in advance.
Distance determination module 801, for determining the relativity shift of the grid at each AP place grid and terminal place to be positioned in network, determines the distance of AP and terminal to be positioned according to described relativity shift.
Above-mentioned measurement AP choice device is as the device on a logical meaning, and it by processor, computer program instructions corresponding in nonvolatile memory is read operation in internal memory to be formed.When the computer program instructions of correspondence is performed, the measurement AP choice device of formation is used for performing corresponding operating according to the measurement AP system of selection in above-described embodiment.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (10)
1. the measurement AP system of selection in RTT measurement and positioning system, it is characterized in that, the method comprises:
Obtain the coordinate information of each AP and the coordinate information of terminal to be positioned in network, determine the distance of each AP and terminal to be positioned according to described coordinate information, select from the nearest N number of AP of described terminal to be positioned according to described distance, wherein, N is not less than N
min, described N
minvalue determine according to positioning requirements;
When N is greater than N
maxtime, from described N number of AP, according to distance from closely to far, select the different AP of channel as measurement AP;
Wherein, the total number of channels in network is not less than N
min, each AP is uniformly distributed according to channel, and adjacent AP is different channel.
2. method according to claim 1, is characterized in that, the method also comprises:
When N is not more than N
maxtime, using described N number of AP as measurement AP.
3. method according to claim 1, is characterized in that, described each AP is uniformly distributed according to channel and comprises:
Space isolation between the AP of cochannel is two AP spacing or is greater than two AP spacing.
4. method according to claim 1, is characterized in that, the total number of channels in network is 6.
5. the method according to the arbitrary claim of Claims 1-4, is characterized in that, obtains the coordinate information of each AP and the coordinate information of terminal to be positioned in network, determines that the distance of each AP and terminal to be positioned comprises according to described coordinate information:
The region of the described network coverage is divided into the identical grid of size in advance;
Determine the relativity shift of the grid at each AP place grid and terminal place to be positioned in network, determine the distance of AP and terminal to be positioned according to described relativity shift.
6. the measurement AP choice device in RTT measurement and positioning system, is characterized in that, this device comprises distance determination module, roughly selects module and selected module;
Described distance determination module, for the coordinate information of the coordinate information and terminal to be positioned that obtain each AP in network, determines the distance of each AP and terminal to be positioned according to described coordinate information;
Describedly roughly select module, for selecting according to described distance from the nearest N number of AP of described terminal to be positioned, wherein, N is not less than Nmin, and the value of described Nmin is determined according to positioning requirements;
Described selected module, for being greater than N as N
maxtime, from described N number of AP, according to distance from closely to far, select the different AP of channel as measurement AP;
Wherein, the total number of channels in network is not less than N
min, each AP is uniformly distributed according to channel, and adjacent AP is different channel.
7. device according to claim 6, is characterized in that,
Describedly roughly select module, for being not more than N as N
maxtime, using described N number of AP as measurement AP.
8. device according to claim 6, is characterized in that, described each AP is uniformly distributed according to channel and comprises:
Space isolation between the AP of cochannel is two AP spacing or is greater than two AP spacing.
9. device according to claim 6, is characterized in that, the total number of channels in network is 6.
10. the device according to the arbitrary claim of claim 6 to 9, is characterized in that, the region of the described network coverage is divided into the identical grid of size in advance;
Described distance determination module, for determining the relativity shift of the grid at each AP place grid and terminal place to be positioned in network, determines the distance of AP and terminal to be positioned according to described relativity shift.
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| CN112689317A (en) * | 2019-10-18 | 2021-04-20 | 大唐移动通信设备有限公司 | Method and device for determining access equipment list, network node and terminal |
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| US20110183690A1 (en) * | 2010-01-28 | 2011-07-28 | Fujitsu Limited | Radio communication apparatus, position measurement method for radio communication apparatus, and radio communication system |
| CN102291674A (en) * | 2011-07-25 | 2011-12-21 | 盛乐信息技术（上海）有限公司 | Wireless positioning method and system based on wireless fidelity (Wi-Fi) |
| US20140248905A1 (en) * | 2011-11-02 | 2014-09-04 | Lg Electronics Inc. | Mobile terminal, method of computing absolute coordinates of wireless ap by mobile terminal, and system of computing absolute coordinates of wireless ap using mobile terminal |
| CN103796154A (en) * | 2012-10-31 | 2014-05-14 | 华为技术有限公司 | Method, device and system for acquiring application information in WLAN |
| CN103476004A (en) * | 2013-09-26 | 2013-12-25 | 东莞宇龙通信科技有限公司 | Network access auxiliary method and network access auxiliary system |
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| WO2018018861A1 (en) * | 2016-07-28 | 2018-02-01 | 华为技术有限公司 | Csi obtaining method, server, terminal and ap |
| CN107666365A (en) * | 2016-07-28 | 2018-02-06 | 华为技术有限公司 | A kind of CSI acquisition methods, server, terminal and AP |
| CN107666365B (en) * | 2016-07-28 | 2021-09-07 | 华为技术有限公司 | CSI acquisition method, server, terminal and AP |
| US11121802B2 (en) | 2016-07-28 | 2021-09-14 | Huawei Technologies Co., Ltd. | CSI obtaining method, server, terminal, and AP |
| CN112689317A (en) * | 2019-10-18 | 2021-04-20 | 大唐移动通信设备有限公司 | Method and device for determining access equipment list, network node and terminal |
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