CN103095815A - Mobile device positioning method and mobile device positioning device - Google Patents
Mobile device positioning method and mobile device positioning device Download PDFInfo
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- CN103095815A CN103095815A CN2012105936146A CN201210593614A CN103095815A CN 103095815 A CN103095815 A CN 103095815A CN 2012105936146 A CN2012105936146 A CN 2012105936146A CN 201210593614 A CN201210593614 A CN 201210593614A CN 103095815 A CN103095815 A CN 103095815A
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Abstract
The invention provides a mobile device positioning method and a mobile device positioning device. The mobile device positioning method includes the following steps: a monitoring center divides multiple mobile devices to be processed into groups, the monitoring center sends road network information and identification information, which is contained in each group of the mobile devices, to at least one collection node, and the monitoring center receives current position information of the mobile devices sent by the collection node. By using the mobile device positioning method and the mobile device positioning device, the processing speed and the accuracy degree of a great amount of global positioning system (GPS) positioning information of the monitoring center can be improved, and therefore real-time display of specific positions of the mobile devices can be realized.
Description
Technical field
The present invention relates to data processing technique, relate in particular to a kind of positioning of mobile equipment method and apparatus.
Background technology
Existing supervisory control system, mainly formed by mobile device terminal, wireless-transmission network and Surveillance center, be mounted with global positioning system (Global Positioning System on mobile device terminal, GPS), global positioning system is used for gathering the locating information of mobile device, wireless-transmission network reports Surveillance center for the locating information of the mobile device that global positioning system is collected, and Surveillance center is used for analyzing the locating information of mobile device, obtains the more specific location information of mobile device.
In existing supervisory control system, Surveillance center need to process the GPS locating information of a large amount of mobile devices of obtaining, obtains the more specific location information of these mobile devices.
Yet, when Surveillance center processes the mass GPS locating information, be difficult to the GPS locating information of magnanimity is processed fast and accurately, and then be difficult to show in real time the particular location of mobile device.
Summary of the invention
The invention provides a kind of positioning of mobile equipment method and apparatus, be used for to solve prior art and be difficult to the GPS locating information of magnanimity is processed fast and accurately, and then be difficult to show in real time the problem of the particular location of mobile device.
First aspect of the present invention is to provide a kind of positioning of mobile equipment method, comprising:
Surveillance center organizes division to pending a plurality of mobile devices;
described Surveillance center sends at least one acquisition node with the identification information of road network information and every group of mobile device that comprises, so that described acquisition node gathers the locating information of corresponding mobile device according to described identification information, and determine the current location information of corresponding mobile device according to described locating information and described road network information, described road network information comprises the road origin information of described Surveillance center monitoring, endpoint information and path locus information, described locating information comprises the identification information of mobile device at least, the longitude information of described mobile device and latitude information,
Described Surveillance center receives the current location information of the described mobile device of described acquisition node transmission.
Another aspect of the present invention provides a kind of positioning of mobile equipment method, comprising:
Acquisition node receives the road network information of Surveillance center's transmission and the identification information of at least one mobile device, described at least one mobile device belongs to the equipment on the same group that described Surveillance center divides, and described road network information comprises road origin information, endpoint information and the path locus information of described Surveillance center monitoring;
Described acquisition node gathers the locating information of corresponding mobile device according to described identification information, described locating information comprises longitude information and the latitude information of the identification information of mobile device, described mobile device at least;
Described acquisition node is determined the current location information of mobile device according to described locating information and described road network information;
Described acquisition node sends to Surveillance center with the current location information of described mobile device.
Another aspect of the present invention provides a kind of positioning device for mobile equipment, comprising:
Divide module, be used for pending a plurality of mobile devices are organized division;
sending module, be used for the identification information of road network information and every group of mobile device that comprises is sent at least one acquisition node, so that described acquisition node gathers the locating information of corresponding mobile device according to described identification information, and determine the current location information of corresponding mobile device according to described locating information and described road network information, described road network information comprises the road origin information of described Surveillance center monitoring, endpoint information and path locus information, described locating information comprises the identification information of mobile device at least, the longitude information of described mobile device and latitude information,
Receiver module is for the current location information of the described mobile device that receives described acquisition node transmission.
Another aspect of the present invention provides a kind of positioning device for mobile equipment, comprising:
Receiver module, be used for receiving the road network information of Surveillance center's transmission and the identification information of at least one mobile device, described at least one mobile device belongs to the equipment on the same group that described Surveillance center divides, and described road network information comprises road origin information, endpoint information and the path locus information of described Surveillance center monitoring;
Acquisition module is used for the locating information according to the corresponding mobile device of described identification information collection, and described locating information comprises longitude information and the latitude information of the identification information of mobile device, described mobile device at least;
Determination module is used for determining according to described locating information and described road network information the current location information of mobile device;
Sending module is used for the current location information of described mobile device is sent to Surveillance center.
The present invention organizes division by Surveillance center to pending a plurality of mobile devices, the identification information of road network information and every group of mobile device that comprises is sent at least one acquisition node, and the current location information of the described mobile device of reception acquisition node transmission, improve processing speed and the accuracy of Surveillance center to the GPS locating information of magnanimity, and then realized showing in real time the particular location of mobile device.
Description of drawings
Fig. 1 is the flow chart of an embodiment of positioning of mobile equipment method of the present invention;
Fig. 2 is the flow chart of another embodiment of positioning of mobile equipment method of the present invention;
Fig. 3 a is the structural representation that acquisition node is searched the road of possible mobile device coupling;
Fig. 3 b is the structural representation that acquisition node is searched the road of mobile device coupling;
Fig. 3 c is the structural representation that acquisition node is determined the current location of mobile device;
Fig. 4 is the flow chart of another embodiment of positioning of mobile equipment method of the present invention;
Fig. 5 is the structural representation of an embodiment of positioning of mobile equipment method of the present invention;
Fig. 6 is the structural representation of another embodiment of positioning of mobile equipment method of the present invention.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
Fig. 1 is the flow chart of an embodiment of positioning of mobile equipment method of the present invention, as shown in Figure 1, comprising:
101, Surveillance center organizes division to pending a plurality of mobile devices.
Wherein, the overall area at Surveillance center can will monitor according to default division methods a plurality of mobile devices place is divided into a plurality of subregions, corresponding at least one acquisition node in each subregion, Surveillance center can obtain the current time historical position information before of mobile device, determine the subregion that mobile device is affiliated, will belong to same subregional mobile device and be divided into one group.Pending mobile device mainly refers to the various vehicles that need to monitor, as armoured van, express delivery vehicle and mail van etc.
Further, Surveillance center can be by building sign, as the gas station, the overall area that adds a plurality of mobile devices place that power station etc. will monitor is divided into a plurality of subregions.Surveillance center also can divide the overall area at a plurality of mobile devices place of monitoring by Dongcheng District, Xicheng District, Fengtai District, Chaoyang District etc.Surveillance center can also divide the overall area at a plurality of mobile devices place of monitoring by route, as North 2nd Ring Road, North 3rd Ring Road, South 2nd Ring Road, South 3rd Ring Road etc.
102, Surveillance center sends at least one acquisition node with the identification information of road network information and every group of mobile device that comprises, so that acquisition node gathers the locating information of corresponding mobile device according to identification information, and determine the current location information of corresponding mobile device according to locating information and road network information, road network information comprises road origin information, endpoint information and the path locus information of Surveillance center's monitoring, and locating information comprises the identification information of mobile device, longitude information and the latitude information of mobile device at least.
Surveillance center can send to corresponding at least one acquisition node in subregion corresponding to mobile device with identification information and the road network information that belongs to same subregional one group of mobile device, so that acquisition node gathers the locating information of mobile device.The identification information of mobile device can be the ID of mobile device, as license plate number of vehicle etc.Before Surveillance center sent at least one acquisition node with the identification information of road network information and every group of mobile device that comprises, Surveillance center can also obtain road network information from electronic chart.
103, Surveillance center receives the current location information of the mobile device of acquisition node transmission.
The current location of the mobile device that Surveillance center can send at least one acquisition node that receives adopts rich network application (Rich InternetApplication, RIA) technology to be presented in electronic chart.
Further, Surveillance center can obtain the historical movement trace information in setting-up time before the mobile device current time that Surveillance center preserves, the historical movement trace information of mobile device is in the setting-up time of mobile device before the current time, and each is the positional information of mobile device constantly.Surveillance center can be according to historical movement trace information and institute's current location information of mobile device, determine the current movement locus of mobile device, current movement locus is that position and the current location of each moment mobile device in the setting-up time of mobile device before the current time carried out the movement locus that line obtains afterwards in chronological order.Surveillance center can adopt the current movement locus of mobile device the RIA technology to show.
The positioning of mobile equipment method that the present embodiment provides is organized division by Surveillance center to pending a plurality of mobile devices, the identification information of road network information and every group of mobile device that comprises is sent at least one acquisition node, and the current location information of the described mobile device of reception acquisition node transmission, improve processing speed and the accuracy of Surveillance center to the GPS locating information of magnanimity, and then realized showing in real time the particular location of mobile device.
Fig. 2 is the flow chart of another embodiment of positioning of mobile equipment method of the present invention, as shown in Figure 2, comprising:
201, acquisition node receives the road network information of Surveillance center's transmission and the identification information of at least one mobile device, at least one mobile device belongs to the equipment on the same group that Surveillance center divides, and road network information comprises road origin information, endpoint information and the path locus information of Surveillance center's monitoring.
202, acquisition node gathers the locating information of corresponding mobile device according to identification information, and locating information comprises the identification information of mobile device, longitude information and the latitude information of mobile device at least.
203, acquisition node is determined the current location information of mobile device according to locating information and road network information.
Acquisition node can first be determined the road information of mobile device coupling according to locating information and road network information, then determines the current location information of mobile device according to this road information.
As shown in Fig. 3 a, Fig. 3 b and Fig. 3 c, acquisition node determines that the detailed process of the road information that mates with mobile device is: acquisition node is with longitude information and the coordinate points corresponding to latitude information of mobile device, be that measuring position in Fig. 3 a is the center of circle, justify as radius take default position error, search the crossing road set of path locus and this circle, comprise road a in the road set, road b, road c, road d, road e, road f.If comprise the current time road corresponding to position before of mobile device in the road set, the road of determining the mobile device coupling is the current time road corresponding to position before of mobile device.If do not comprise the current time road corresponding to position before of mobile device in the road set, the route of all roads from the center of circle to the road set is done vertical line, obtain the center of circle to the length of perpendicular of every road, getting road corresponding to the shortest vertical line is the road information of mobile device coupling.In addition, acquisition node also can obtain interior coordinate points corresponding to a plurality of locating information of a period of time before the mobile device current time, the route of all roads to the road set is done vertical line respectively from coordinate points corresponding to a plurality of locating information and the center of circle, as shown in Fig. 3 b, obtain the mean value of all length of perpendicular of these coordinate points and the center of circle every road in the road set, get the road information that minimum road corresponding to length of perpendicular mean value is the mobile device coupling.
The road that acquisition node can mate from the measuring position to the mobile device is made vertical line, and as the road a in Fig. 3 c, intersection point is the current location of mobile device.Acquisition node can also be approximately a plurality of line segments with the road of mobile device coupling, makes vertical line from the center of circle to each line segment, and getting intersection point corresponding to the shortest vertical line is the current location of mobile device.If intersection point corresponding to the shortest vertical line on the extended line of the line segment of correspondence, calculates respectively the center of circle to the length of two end points of this line segment, the center of circle is defined as the current location of mobile device to the shorter end points of the length of the end points of this line segment.
due to the locating information from collection center collection mobile device, the current location of determining mobile device shows to Surveillance center between the current location of mobile device certain time of delay, cause the gap between current location and physical location in Fig. 3 c, acquisition node can obtain translational speed and the above-mentioned time of delay of mobile device, and according to translational speed and time of delay of mobile device, determine the current location of mobile device and the gap between physical location, the physical location of employing mobile device replaces the current location of mobile device, improve the accuracy that gathers the center processing locating information, and then improve the accuracy that Surveillance center processes locating information, realize showing in real time further the particular location of mobile device.
Further, acquisition node can also obtain the directional information of mobile device, when mobile device turns round, acquisition node can be according to the directional information of longitude information, latitude information and the mobile device of mobile device, determine the road information of mobile device coupling, improve acquisition node and determine the accuracy of the road information of mobile device coupling, further improve the accuracy that acquisition node is determined the current location of mobile device, improve the accuracy that Surveillance center processes locating information, realize showing in real time further the particular location of mobile device.
204, acquisition node sends to Surveillance center with the current location information of mobile device.
The positioning of mobile equipment method that the embodiment of the present invention provides receives the road network information of Surveillance center's transmission and the identification information of at least one mobile device by acquisition node, and gather the locating information of corresponding mobile device according to identification information, the current location information of determining mobile device according to locating information and the road network information of mobile device, improve processing speed and the accuracy of Surveillance center to the GPS locating information of magnanimity, and then realized showing in real time the particular location of mobile device.
Fig. 4 is the flow chart of another embodiment of positioning of mobile equipment method of the present invention, as shown in Figure 4, on basis embodiment illustrated in fig. 2, if acquisition node receives the identification information of at least two mobile devices of Surveillance center's transmission, acquisition node determines that according to locating information and road network information the current location information of mobile device can specifically comprise the following steps:
2031, acquisition node according to longitude information and the corresponding locating information of latitude information of at least two mobile devices, carries out dividing elements at least two mobile devices.
The overall area at a plurality of mobile devices place that will monitor according to default division methods when Surveillance center is divided into a plurality of subregions, during each subregion corresponding at least one acquisition node, acquisition node also can be divided corresponding subregion according to longitude information and the latitude information of mobile device, the subregion is divided into a plurality of unit, and each unit comprises at least one mobile device.
2032, acquisition node sends at least one analysis node with the locating information of the mobile device in road network information and each unit, so that analysis node is determined the current location information of mobile device according to locating information and road network information.
Analysis node determines that according to locating information and road network information process and the acquisition node of the current location information of mobile device determine that according to locating information and road network information the process of current location information of mobile device is identical.
2033, the current location information of the mobile device of acquisition node receiving and analyzing node transmission.
the positioning of mobile equipment method that the embodiment of the present invention provides receives the road network information of Surveillance center's transmission and the identification information of at least one mobile device by acquisition node, and gather the locating information of corresponding mobile device according to identification information, and locating information and the road network information of mobile device sent at least one analysis node, the current location information of determining mobile device according to locating information and the road network information of mobile device by analysis node, improved further processing speed and the accuracy of Surveillance center to the GPS locating information of magnanimity, and then realization shows the particular location of mobile device in real time.
One of ordinary skill in the art will appreciate that: all or part of step that realizes above-mentioned each embodiment of the method can be completed by the hardware that program command is correlated with.Aforesaid program can be stored in a computer read/write memory medium.This program is carried out the step that comprises above-mentioned each embodiment of the method when carrying out; And aforesaid storage medium comprises: the various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
Fig. 5 is the structural representation of an embodiment of positioning device for mobile equipment of the present invention, as shown in Figure 5, comprising:
Sending module 52, be used for the identification information of road network information and every group of mobile device that comprises is sent at least one acquisition node, so that acquisition node gathers the locating information of corresponding mobile device according to identification information, and determine the current location information of corresponding mobile device according to locating information and road network information, road network information comprises road origin information, endpoint information and the path locus information of Surveillance center's monitoring, and locating information comprises the identification information of mobile device, longitude information and the latitude information of mobile device at least;
Further, divide module 51 and specifically be used for, the overall area at a plurality of mobile devices place that will monitor according to default division methods is divided into a plurality of subregions, at least one acquisition node of correspondence in each subregion; Obtain the current time historical position information before of mobile device, determine the subregion that mobile device is affiliated; To belong to same subregional mobile device and be divided into one group.
Further, sending module 52 also is used for, and identification information and the road network information that will belong to same subregional one group of mobile device send to affiliated at least one acquisition node corresponding to subregion of mobile device.
Again further, a kind of positioning device for mobile equipment that provides embodiment illustrated in fig. 5 also comprises:
Acquisition module is for the historical movement trace information in setting-up time before the mobile device current time that obtains Surveillance center's preservation;
Determination module is used for according to historical movement trace information and current location information, determines the current movement locus of mobile device.
The positioning device for mobile equipment that the embodiment of the present invention provides is located the process of mobile device with embodiment illustrated in fig. 1 identical, does not repeat them here the process embodiment shown in Figure 1 of location mobile device.
The positioning device for mobile equipment that the embodiment of the present invention provides is organized division by Surveillance center to pending a plurality of mobile devices, the identification information of road network information and every group of mobile device that comprises is sent at least one acquisition node, and the current location information of the described mobile device of reception acquisition node transmission, improve processing speed and the accuracy of Surveillance center to the GPS locating information of magnanimity, and then realized showing in real time the particular location of mobile device.
Fig. 6 is the structural representation of another embodiment of positioning device for mobile equipment of the present invention, as shown in Figure 6, comprising:
The locating information of the mobile device in road network information and each unit is sent at least one analysis node, so that analysis node is determined the current location information of mobile device according to locating information and road network information;
The current location information of the mobile device that the receiving and analyzing node sends.
Sending module 64 is used for the current location information of mobile device is sent to Surveillance center.
The positioning device for mobile equipment that the embodiment of the present invention provides is located the process of mobile device with embodiment illustrated in fig. 2 identical, does not repeat them here the process embodiment shown in Figure 2 of location mobile device.
The positioning device for mobile equipment that the embodiment of the present invention provides, by receiving road network information that Surveillance center sends and the identification information of at least one mobile device, and gather the locating information of corresponding mobile device according to identification information, the current location information of determining mobile device according to locating information and the road network information of mobile device, improve processing speed and the accuracy of Surveillance center to the GPS locating information of magnanimity, and then realized showing in real time the particular location of mobile device.
It should be noted that at last: above each embodiment is not intended to limit only in order to technical scheme of the present invention to be described; Although with reference to aforementioned each embodiment, the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps some or all of technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the scope of various embodiments of the present invention technical scheme.
Claims (12)
1. a positioning of mobile equipment method, is characterized in that, comprising:
Surveillance center organizes division to pending a plurality of mobile devices;
described Surveillance center sends at least one acquisition node with the identification information of road network information and every group of mobile device that comprises, so that described acquisition node gathers the locating information of corresponding mobile device according to described identification information, and determine the current location information of corresponding mobile device according to described locating information and described road network information, described road network information comprises the road origin information of described Surveillance center monitoring, endpoint information and path locus information, described locating information comprises the identification information of mobile device at least, the longitude information of described mobile device and latitude information,
Described Surveillance center receives the current location information of the described mobile device of described acquisition node transmission.
2. method according to claim 1, is characterized in that, also comprises:
Described Surveillance center obtains the historical movement trace information in setting-up time before the described mobile device current time that described Surveillance center preserves;
Described Surveillance center determines the current movement locus of described mobile device according to described historical movement trace information and described current location information.
3. method according to claim 1 and 2, is characterized in that, if described Surveillance center preserves the historical movement trace information of pending a plurality of mobile devices, described Surveillance center organizes division to pending a plurality of mobile devices, is specially:
The overall area at described Surveillance center will monitor according to default division methods a plurality of mobile devices place is divided into a plurality of subregions, each subregion at least one acquisition node of correspondence;
Described Surveillance center obtains the current time historical position information before of mobile device, determines the subregion that mobile device is affiliated;
Described Surveillance center will belong to same subregional mobile device and be divided into one group.
4. method according to claim 3, is characterized in that, described Surveillance center sends at least one acquisition node to be specially the identification information of road network information and every group of mobile device that comprises:
Identification information and road network information that described Surveillance center will belong to same subregional one group of mobile device send to affiliated at least one acquisition node corresponding to subregion of described mobile device.
5. a positioning of mobile equipment method, is characterized in that, comprising:
Acquisition node receives the road network information of Surveillance center's transmission and the identification information of at least one mobile device, described at least one mobile device belongs to the equipment on the same group that described Surveillance center divides, and described road network information comprises road origin information, endpoint information and the path locus information of described Surveillance center monitoring;
Described acquisition node gathers the locating information of corresponding mobile device according to described identification information, described locating information comprises longitude information and the latitude information of the identification information of mobile device, described mobile device at least;
Described acquisition node is determined the current location information of mobile device according to described locating information and described road network information;
Described acquisition node sends to Surveillance center with the current location information of described mobile device.
6. method according to claim 5, it is characterized in that, if acquisition node receives the identification information of at least two mobile devices of Surveillance center's transmission, described acquisition node is determined the current location information of mobile device according to described locating information and described road network information, comprising:
Described acquisition node carries out dividing elements according to longitude information and the corresponding locating information of latitude information of described at least two mobile devices to described at least two mobile devices;
Described acquisition node sends at least one analysis node with the locating information of the mobile device in described road network information and each unit, so that described analysis node is determined the current location information of described mobile device according to described locating information and described road network information;
Described acquisition node receives the current location information of the described mobile device of described analysis node transmission.
7. a positioning device for mobile equipment, is characterized in that, comprising:
Divide module, be used for pending a plurality of mobile devices are organized division;
sending module, be used for the identification information of road network information and every group of mobile device that comprises is sent at least one acquisition node, so that described acquisition node gathers the locating information of corresponding mobile device according to described identification information, and determine the current location information of corresponding mobile device according to described locating information and described road network information, described road network information comprises the road origin information of described Surveillance center monitoring, endpoint information and path locus information, described locating information comprises the identification information of mobile device at least, the longitude information of described mobile device and latitude information,
Receiver module is for the current location information of the described mobile device that receives described acquisition node transmission.
8. device according to claim 7, is characterized in that, also comprises: acquisition module, for the historical movement trace information in setting-up time before the described mobile device current time that obtains the preservation of described Surveillance center;
Determination module is used for according to described historical movement trace information and described current location information, determines the current movement locus of described mobile device.
9. according to claim 7 or 8 described devices, it is characterized in that, if described Surveillance center preserves the historical movement trace information of pending a plurality of mobile devices, described division module specifically is used for, the overall area at a plurality of mobile devices place that will monitor according to default division methods is divided into a plurality of subregions, at least one acquisition node of correspondence in each subregion;
Obtain the current time historical position information before of mobile device, determine the subregion that mobile device is affiliated;
To belong to same subregional mobile device and be divided into one group.
10. device according to claim 9, it is characterized in that, described sending module also is used for, and identification information and the road network information that will belong to same subregional one group of mobile device send to affiliated at least one acquisition node corresponding to subregion of described mobile device.
11. a positioning device for mobile equipment is characterized in that, comprising:
Receiver module, be used for receiving the road network information of Surveillance center's transmission and the identification information of at least one mobile device, described at least one mobile device belongs to the equipment on the same group that described Surveillance center divides, and described road network information comprises road origin information, endpoint information and the path locus information of described Surveillance center monitoring;
Acquisition module is used for the locating information according to the corresponding mobile device of described identification information collection, and described locating information comprises longitude information and the latitude information of the identification information of mobile device, described mobile device at least;
Determination module is used for determining according to described locating information and described road network information the current location information of mobile device;
Sending module is used for the current location information of described mobile device is sent to Surveillance center.
12. device according to claim 11 is characterized in that, if acquisition node receives the identification information of at least two mobile devices of Surveillance center's transmission, described determination module specifically is used for,
According to longitude information and the corresponding locating information of latitude information of described at least two mobile devices, described at least two mobile devices are carried out dividing elements;
The locating information of the mobile device in described road network information and each unit is sent at least one analysis node, so that described analysis node is determined the current location information of described mobile device according to described locating information and described road network information;
Receive the current location information of the described mobile device of described analysis node transmission.
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| CN105303637A (en) * | 2015-11-03 | 2016-02-03 | 用友网络科技股份有限公司 | Coordinate point uploading and automatic routing inspection device and method based on mobile application |
| CN105303637B (en) * | 2015-11-03 | 2018-05-18 | 用友网络科技股份有限公司 | Coordinate points upload and automatic inspection device and method based on mobile application |
| US11589188B1 (en) | 2021-05-27 | 2023-02-21 | T-Mobile Usa, Inc. | Device-based timely emergency call routing |
| US11924713B2 (en) | 2021-05-27 | 2024-03-05 | T-Mobile Usa, Inc. | Device-based timely emergency call routing |
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