EP4073537A1 - Equipement mobile realisant une cartographie de qualite de connexion - Google Patents
Equipement mobile realisant une cartographie de qualite de connexionInfo
- Publication number
- EP4073537A1 EP4073537A1 EP20789160.7A EP20789160A EP4073537A1 EP 4073537 A1 EP4073537 A1 EP 4073537A1 EP 20789160 A EP20789160 A EP 20789160A EP 4073537 A1 EP4073537 A1 EP 4073537A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- access point
- mobile equipment
- smartphone
- current position
- equipment according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
- G01S5/0252—Radio frequency fingerprinting
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/0009—Transmission of position information to remote stations
- G01S5/0018—Transmission from mobile station to base station
- G01S5/0036—Transmission from mobile station to base station of measured values, i.e. measurement on mobile and position calculation on base station
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/27—Monitoring; Testing of receivers for locating or positioning the transmitter
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/318—Received signal strength
- H04B17/328—Reference signal received power [RSRP]; Reference signal received quality [RSRQ]
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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
- H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/18—Network planning tools
- H04W16/20—Network planning tools for indoor coverage or short range network deployment
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
- H04W48/14—Access restriction or access information delivery, e.g. discovery data delivery using user query or user detection
Definitions
- 1 / invention relates to the field of local networks implemented by a plurality of access points.
- a distributed Wi-Fi system is used to implement a mesh local area network that has extensive coverage.
- Such a distributed Wi-Fi system comprises a plurality of nodes which communicate with each other via a so-called “backhaul” link which uses, for example, a Wi-Fi radio link or a wired Ethernet link.
- the backhaul link allows nodes to exchange commands, in particular for management, through a communication bus.
- the backhaul link also serves as a support for the various data flows between the nodes and the network.
- Each of the nodes includes at least one so-called “fronthaul” Wi-Fi access point allowing external equipment to communicate with the network.
- One of the nodes of the distributed Wi-Fi system carries a “master” functionality.
- the master node is responsible for managing the distributed Wi-Fi system, including its architecture, and forcing each external device connected to the local network to communicate with one of the fronthaul access points of one of the nodes according to local characteristics of the propagation of Wi-Fi signals.
- the positions of the nodes and the characteristics of the transmission of Wi-Fi signals are not always optimally defined in relation to the space that the network must cover. In particular, if the access points are arbitrarily positioned in a dwelling by a user novice in the matter, the coverage of the network is not optimized.
- the object of the invention is to optimize the coverage of a local network comprising a plurality of access points.
- mobile equipment comprising: a geolocation device arranged to determine a current position of the mobile equipment in a space to be mapped; a communication device arranged to communicate with access points of a local network implemented in the space to be mapped; a control component arranged: to selectively and independently control each access point, via the communication device, so that said access point transmits a reference signal; o to evaluate, from the reference signals received by the communication device, a connection quality in the current position between the mobile equipment and each of the access points.
- the mobile equipment can therefore individually and successively control each access point so that said access point transmits a reference signal.
- the mobile equipment acquires the reference signals transmitted by all the access points, and evaluates the connection quality in the current position.
- By moving the mobile element in the space to be mapped we can quantify the propagation of the radio signals produced individually by the access points, and we obtain a complete mapping and precise of the connection quality. Mapping can be used to configure network access points so that the area to be mapped is covered as efficiently as possible.
- Mobile equipment such as that which has just been described is also proposed, in which the geolocation device is arranged to implement a method for measuring time of flight.
- the geolocation device comprising a UWB communication component and a UWB antenna arranged to cooperate with UWB anchors located in the access points.
- connection quality is evaluated from a power level and / or from a binary rate of each reference signal received by the communication device.
- a mobile device such as that which has just been described, in which the space to be mapped is partitioned according to unitary spatial zones, and in which the control component is arranged to associate the current position and the connection qualities. evaluated in the current position at one of the unitary spatial zones in which the current position is located.
- each unitary spatial zone is a unitary volume.
- control component is arranged to control the power with which each access point transmits the reference signal.
- control component is arranged to select a communication channel on which each access point transmits the reference signal.
- control component is arranged to evaluate, for each access point, a signal strength transmitted by said access point and received by the device. communication, and to control the transmission of the reference signals by each of the access points successively in an order corresponding to a decreasing signal strength.
- control component is also arranged to interrogate each access point so that said access point transmits a power level to the mobile equipment. signal received by said access point.
- control component is also arranged to interrogate each access point so that said access point transmits functional characteristics of said access point to the mobile equipment. access point.
- mobile equipment such as that which has just been described is proposed, the mobile equipment being a smartphone.
- each access point - selectively and independently control each access point so that said access point transmits a reference signal; for each access point, evaluating a connection quality, in the current position, between the mobile equipment and said access point;
- a mapping method as described above is also proposed, in which the space to be mapped is partitioned into a plurality of unit spatial zones, the mapping method further comprising the step of defining a current unit spatial zone in which is located at the current position, and to associate the current record with the current unit spatial zone.
- a mapping method as described above is also proposed, in which, for each access point, the connection qualities are evaluated for a plurality of transmission configurations of said access point.
- mapping method as described above is also proposed, in which the database also includes functional characteristics of the access points.
- mapping method as described above is also proposed, in which the database also includes time-stamped positioning data of the mobile equipment.
- a mapping method such as described above, further comprising the step of producing a map showing the areas covered and the areas not yet covered by the method of mapping the space to be mapped.
- a computer program is also proposed comprising instructions which lead the above mobile equipment to execute the steps of the mapping method which has just been described.
- FIG. 1 schematically represents mobile equipment according to the invention and access points;
- FIG. 2 represents an example of mapping;
- FIG. 3 represents a smartphone according to the invention;
- Figure 4 shows an access point
- FIG. 5 represents the implementation of the UWB geolocation
- FIG. 6 represents steps of a method for selecting an access point by the smartphone
- FIG. 7 represents the steps of a method for collecting by the smartphone functional characteristics of an access point
- FIG. 8 shows unit volumes of a partitioned map space
- FIG. 9 represents the steps of a method for scanning by the smartphone of the transmission configurations of the access points
- FIG. 10 represents steps of a method for managing records
- Figure 11 shows a map obtained by the mapping process.
- a distributed Wi-Fi system comprising a plurality of access points for implementing a local area network, is installed in a dwelling.
- the object of the invention is to produce a map of the connection quality, in the home, with the various access points.
- mobile equipment 1 is used for this, which comprises a geolocation device 2, a communication device 3 and a control component 4.
- the mobile equipment 1 is moved, either by a user or automatically.
- the geolocation device 2 of the mobile equipment 1 determines the current position of the mobile equipment 1 in the home.
- the communication device 3 is arranged to communicate with the access points 5.
- the control component 4 selectively and independently controls each access point 5, via the communication device 3, so that said access point 5 transmits a reference signal.
- the communication device 3 receives the reference signals.
- the control component 4 evaluates, from the received reference signals by the communication device 3, a quality of connection, in the current position, between the mobile equipment 1 and each of the access points 5.
- This mapping is for example similar to that of FIG. 2, which is a two-dimensional mapping carried out in a dwelling 7 using mobile equipment 8.
- the mobile element used is for example a smartphone.
- the smartphone 10 firstly comprises a control component.
- the control component is a central processor 11 which is controlled by an operating system 12.
- the central processor 11 is suitable for executing instructions from an application 13 to implement the mapping method which will be described.
- the smartphone 10 further comprises a communication device, which is a Wi-Fi communication interface 14 (native) comprising a Wi-Fi communication component 15, a first antenna 16 and a second antenna 17.
- Fi 15 comprises a 2.4 GHz channel connected to the first antenna 16 and a 5 GHz channel connected to the second antenna 17.
- the central processor 11 controls the access points via the Wi-Fi communication interface 14 so that they transmit reference Wi-Fi signals.
- the Wi-Fi communication interface 14 acquires the reference Wi-Fi signals emitted by the access points.
- the central processor 11 evaluates the connection qualities from the signals Wi- Reference Fi received by the Wi-Fi communication interface 14.
- the smartphone 10 further comprises a geolocation device 19.
- the geolocation device 19 is designed to implement a method for measuring time of flight.
- the time-of-flight measurement method uses ultra-wideband (or UWB, for Ultra WideBand) technology.
- the geolocation device 19 is here natively embedded in the smartphone 10.
- the geolocation device 19 comprises a communication component 20, an antenna 21 and a microcontroller 22.
- the microcontroller 22 is connected to the central processor 11 via a wired interface (for example I2C, serial, etc.) or wireless (eg Bluetooth).
- each access point 25 includes a central processor 26 which is controlled by an operating system 27.
- the access point 25 further comprises a Wi-Fi communication interface 28 comprising a Wi-Fi communication component 29, a first antenna 30 and a second antenna 31.
- the Wi-Fi communication component 29 comprises a 2.4-way channel. GHz connected to the first antenna 30 and a 5 GHz channel connected to the second antenna 31.
- the access point 25 further comprises a geolocation device 33.
- the geolocation device 33 comprises a UWB communication component 34, a UWB antenna 35 and a microcontroller 36.
- the microcontroller 36 is connected to the central processor 26 via a serial link.
- the microcontroller 36 dialogues with the UWB communication component 34 and supplies the central processor 26 with location information.
- the operating system 27 makes it possible to manage this location information.
- the central processor 26 is suitable for executing software instructions 37 for implementing the geolocation of the smartphone 10.
- the operating system 27 makes the positioning information available for example via a software interface or an API (for Application Programming Interface). Positioning information is retrieved and then processed by an application.
- a software interface or an API for Application Programming Interface
- Each access point 25 is registered at the time of installation with a unique number, for example its MC address (for Media Access Control).
- geolocation is UWB geolocation.
- the geolocation devices 33 of the access points 25 form UWB anchors.
- the UWB anchors are integrated into the access points 25.
- the UWB anchors could perfectly well be distinct from the access points 25 and, in particular, be positioned at locations different.
- Geolocation is based on a trilateration performed from measurements of distances between different elements.
- the distance between the elements taken two by two is obtained by measuring the time of flight of a broadband impulse radioelectric signal which has the property of traveling in a straight line and of crossing the obstacles of an environment encountered in a dwelling. , or, more generally, in any building.
- the smartphone 10 is precisely located in absolute position with respect to the reference mark.
- the position of the smartphone 10 is at the intersection of the spheres centered on each UWB anchor.
- the radius of a sphere centered on a UWB anchor corresponds to the distance, calculated from the time of flight of the UWB signal, between the smartphone 10 and said UWB anchor.
- the DECAWAVE MDEK1001 localization solution is used.
- the UWB 20 communication component of the smartphone 10 is the DECAWAVE DW1000 component.
- the microcontroller 22 of the smartphone 10 is the NORDIC microcontroller containing DECAWAVE firmware making it possible to use the UWB 20 communication component.
- the two components communicate with each other via a serial link.
- the UWB communication component is in charge of forming and transmitting the signals of the pulses radiofrequencies defined by the NORDIC microcontroller, and to receive and decode the radiofrequency pulses received in order to extract the useful data and transmit them to the NORDIC microcontroller.
- the NORDIC microcontroller is in charge of configuring and operating the UWB communication component to generate bursts, and decoding the bursts in return, thus making it possible to calculate, from the round trip time of flight, the distance between the devices. . It is therefore able to directly obtain the distances separating the UWB communication component from the other devices, but also to obtain from the other devices the additional information on the respective distances of the other devices between them. Based on knowledge of the different distances, he is in charge of evaluating the geographical position of each device in relation to a network of reference anchors. For this it implements a trilateration process.
- the NORDIC microcontroller is also responsible for communicating with the central processor 11 of the smartphone 10 via a serial port mounted through a USB link, or directly through a serial link, or even through a Bluetooth link. It is thus able to receive commands to perform specific actions, and to transmit responses to the central processor 11.
- the NORDIC microcontroller offers a certain number of commands which make it possible to trigger a certain number of actions, and to obtain a certain number of actions in return. It is also possible to add commands to existing ones, because the development environment is open, and the source code fully documented. In its default operating mode, the NORDIC microcontroller periodically transmits on the serial link carried by the USB link a report of the state of the system in the form of character strings.
- An example of a character string corresponding to the location is as follows:
- Each line corresponds to one of the equipment of the system (access point 25 or smartphone 10), and we easily detect the following fields associated with a value:
- This information is supplied via the USB link to the operating system 12 of the central processor 11 of the smartphone 10. It is easy for the software embedded in the central processor 11 to collect this information and to process it.
- the previous example shows a geolocation in a plan. It is also possible to obtain geolocation in a three-dimensional space when at least four anchors are deployed in a space and not in a plane.
- the Wi-Fi interface 14 acquires the reference signals emitted by the access points 25, which makes it possible to evaluate the quality of connection, in the current position of the smartphone 10, between the smartphone 10 and each access point 25.
- the smartphone 10 is by default in communication with the best access point 25 chosen by the distributed Wi-Fi system. Radio quality measurements therefore do not make it possible to characterize, for example, the actual coverage of a particular access point.
- the central processor 11 of the smartphone 10 therefore communicates with the access points 25 and selectively controls them. and independently so that the access points 25, in turn, transmit the reference Wi-Fi signal.
- the smartphone 10 sends for this purpose an access point selection message to the master access point 25a (step E1), for example via the bus of the backhaul link carried by its Wi- link. Fi with the current access point and relayed by the backhaul.
- the master access point 25a then implements its mechanisms for active management of the access points to activate the selected access point 25b (step E2), for example by implementing "white-list / black" management. -list ”, or by forcing an access point jump, or by using any other process at its disposal.
- the selected access point 25b transmits an acknowledgment message to the master access point 25a (step E3) which transmits it to the smartphone 10
- the selection of the access points by the smartphone 10 is carried out as follows.
- the central processor 11 of the smartphone 10 evaluates, for each access point, a signal strength transmitted by said access point and received by the communication device of the smartphone 10, and controls the transmission of the reference signals by each of the access points 25 successively in an order corresponding to a decreasing signal strength.
- the application 13 of the smartphone 10 is connected by default to the best access point defined by the master access point via a conventional roaming method.
- the central processor 11 requests to switch to the second best access point choice provided by the master access point, and so on until the last accessible access point.
- the central processor 11 of the smartphone 10 can also define the characteristics of the reference Wi-Fi signals.
- the central processor 11 can for example define the power with which each access point 25 transmits the reference Wi-Fi signal. It is thus possible to control an access point 25 in particular so that the latter transmits a beacon signal using a specific power different from the natural power, for example less than 6 dB.
- a specific command is then sent to the master access point by the smartphone 10 via the backhaul link.
- This command is interpreted and then translated on the access point considered by a low level command sent to the radio interface.
- the command: wl pwr_percent 50 instructs the access point to reduce its transmit power by 6 dB.
- This specificity makes it possible, from the smartphone 10, to carry out in a given location various reception level measurements, and thus to refine a measurement in which the signal received at the normal power of the access point would be saturated due to proximity to it.
- the central processor 11 is also arranged to select a communication channel on which each access point 25 transmits the reference Wi-Fi signal. It is therefore possible to envisage controlling a particular access point so that it implements a transmission channel other than the channel for which it was initially configured.
- a specific command is then sent to the master access point by the smartphone 10 via the backhaul link. This command will be interpreted and translated by the access point in question, by a low level command sent to the radio interface. For example, the command: iwconfig channel 6 instructs the Qualcomm-type access point to select channel 6 to communicate.
- All of these commands can be executed by temporarily forcing the selected access point to use the requested characteristics in its normal SSID (SSID for Service Set Identifier). They can also be executed by adding on the access point a beacon specific to the requested measurement (predefined SSID for example) which will have the requested characteristics (channel, power, etc.) thus avoiding disrupting the native operation of the system.
- SSID Service Set Identifier
- the central processor 11 evaluates the connection qualities from the reference Wi-Fi signals received.
- Connection quality can be assessed by measuring one or more parameters: received signal level, for example RSSI level (for Received Signai Strength
- Indication associated with a transmission frequency or channel, bit rate, etc.
- the smartphone's Wi-Fi communication interface uses, for example, the iwconfig command on Linux, which returns the received signal level or RSSI with frequency (like the example below).
- Retry short limit 7 RTS thr: off Fragment thr: off Power Management: on
- Other information can be collected (latency / ping time, etc.) through a communication established with the selected access point using for example a file exchange with the access point 25 to measure the bidirectional flow between the smartphone 10 and said access point.
- the central processor 11 of the smartphone 10 can also interrogate each access point 25 so that said access point transmits to the smartphone 10 a level of Wi-Fi signal strength received by said access point.
- a specific command is sent by the smartphone 10 to the master access point 25a via the backhaul link (step E10).
- This command is transferred to the interrogated access point 25c via a low level command sent to the Wi-Fi interface of the interrogated access point 25c (step Eli).
- the access point queried 25c transmits the RSSI to the master access point 25a (step E12) which transmits it to the smartphone 10 (step E13).
- the command: wl rssl 90: 4d: 4a: cc: 6b: 8e allows to obtain the reception conditions of the access point queried whose MAC address is: 90: 4d: 4a: cc: 6b: 8th.
- the command: netsh wlan show ail provides a report of reception of the signals of all the access points in the vicinity without establishing a communication with them. The information is taken from the reception of the beacon signals transmitted by these access points.
- the results of the measurements are therefore stored in a first table, called the “measurement table”, of this database, which can be used during post-processing, for example with a view to optimizing the position of points d. access, or power modulation of access points, or for any other use.
- the space to be mapped is partitioned into unit spatial areas, which can be unit areas or unit volumes, positioned relative to a reference frame.
- the central processor 11 of the smartphone 10 associates the current position and the connection qualities evaluated in the current position with one of the unit spatial zones in which the current position is located.
- each recording made when the smartphone 10 is in a current position corresponds to a unitary spatial zone defined around a point in space identified by its coordinates.
- These unit volumes correspond to as many records in the database measurements table.
- the records in the database measurement table are created as the smartphone 10 moves, thus enriching the cartographic data.
- Each record contains, for example, the following fields:
- an identification of the access point used for a first measurement for example its MAC address; a sub-field identifying a channel used by this first access point; a sub-field identifying a power implemented by this first access point; a sub-field containing a value representing a qualitative value of the link with this first access point on this first channel resulting from the use of this first power; o a sub-field containing a timestamp of the last measurement carried out under these conditions;
- a second database table contains functional characteristics of the different UWB anchors.
- the second table is completed, for example, depending on the discovery of the new UWB anchors by the smartphone 10 when it is moved into the home.
- the second table here contains a record for each of the system's UWB anchors, each record containing for example:
- a third field showing a first capability of the access point on which the anchor is located, for example the availability of the 2.4 GHz mode; o a sub-field can be used to show the identification of the 2.4GHz access point, for example its MAC address; o a subfield can be used to show the ability of the 2.4GHz mode to handle different channels; o a subfield can be used to show the capacity of the 2.4GHz mode to handle different powers;
- a fourth field showing a second capability of the Wi-Fi access point for example the availability of 5GHz mode
- o a sub-field can be used to show the identification of the 5GHz access point, for example its MAC address
- o a subfield can be used to show the ability of 5GHz mode to manage different channels
- o a subfield can be used to show the ability of 5GHz mode to handle different power.
- AP_5_enable true; "C4-85-08-B2-37-04"; "36,40,44,48,52,56,60,64"; "20.0"
- AP_5_enable true; "C4-85-08-B2-37-06";
- the database also includes a third table.
- the third table contains information relating to the movements of the smartphone 10 and can be used to supplement mapping information, for example to highlight a thin obstacle, such as a partition, which would have very little influence on the radio propagation measurements, and which would be too thin to completely prevent access to a complete unit space area.
- the third table can include a series of records containing the coordinates of the unit spatial areas traversed associated with the timestamp of the entry or exit of the unit spatial area.
- the smartphone 10, associated with the network of access points 25, executes the software implementing the mapping method.
- the application 13 can be started or paused via an action on a button, for example in a menu.
- the application 13 collects at regular intervals, for example every second, its position relative to the reference system formed by the UWB anchors.
- the application 13 will perform the following operations: determine in the table of measurements the record corresponding to the present position of the smartphone 10.
- the application calculates the coordinates of the central point of the unitary spatial zone corresponding to its position provided by the geolocation device by rounding its own x & y coordinates to the nearest multiple corresponding to the graininess of the database. The application selects this record as the current record.
- This information is saved in the database.
- the mechanisms for measuring other radio conditions can be implemented, and the results can supplement current measurements.
- the access point control mechanisms 25 as previously described could be implemented based on the records of the second table (of the anchors) to scan each of the channel, radio interface and table configurations. power, and thus complete the current measurements with as many values corresponding to the different measurement configurations. Each measurement corresponding to a particular condition of the access point and of the smartphone 10 will be considered as a field of the current record of the table of measurements of the smartphone 10.
- mapping can therefore be considered as “multilayer”. Each layer corresponds to a measurement condition.
- FIG. 9 shows the steps of a method of scanning all the possible configurations to establish the measurements corresponding to each of the configurations.
- the measurements are first of all carried out in a default configuration (step E20).
- Measurements M (i) corresponding to this first configuration are carried out.
- the results are stored in the database (step E22) It is checked whether another configuration is available
- the scanning method returns to step E20.
- the smartphone 10 configures the access point 25 to force a new measurement configuration (step E25).
- the scanning method then returns to step E22. It is noted that the different possible iterations of each measurement corresponding to a condition can be averaged between them to refine the relevance of the value.
- restored values which can also be averaged by using a weighting with the restored previous value of the current record of the database. For example, a weighting of 4 of the measured mean and of 1 of the restored value will make recent measurements preponderant with respect to the history. Likewise, restored values which
- the timestamp exceeds a limit (eg values older than 1 month) may be ignored, as they are deemed too old.
- FIG. 10 shows the steps of a record management method during the journey leading to a movement of the smartphone.
- the geolocation device produces the x, y and z coordinates of the current position of the smartphone (step E30).
- the current record is selected from the database (step E31). It is checked whether it is a new current recording (that is to say a movement of the smartphone in another unitary spatial zone): step E32. If this is not the case, the measurements are carried out (step E33). If this is the case, the measurements of the previous current recording are saved (step E34).
- step E35 It is checked whether the previous current record existed (step E35). If this is the case, the measurements are recovered (step E36). Otherwise, the previous current record is created (step E37), and the measurements are recovered (step E36).
- the database also includes a third table containing the movements of the smartphone 10. It is then necessary, simultaneously, to create a new record in this third table. This record contains the location of the location just left, and the timestamp of this event.
- the database is then used to produce a map which can be displayed on its screen by the smartphone 10.
- this map has two roles: to show the qualities of connection in the mapped space, and provide graphical assistance to the user in acquiring measurements.
- the user who moves in the meshed space will browse more or less quickly the different unitary spatial zones corresponding to the different records of the smartphone's measurement table.
- a means is presented here making it possible to show in graphic form the unitary spatial zones covered, highlighting the unitary spatial zones not covered, and also allowing to present in the form of 'a color code for the actual coverage recorded during its movement.
- Each record in the database corresponding to a square area with a side of 30 cm positioned in an x, y coordinate system, it is natural to represent these areas as so many squares of defined size, positioned at defined coordinates while respecting a scale in order to to show the area in screen space, for example using a scale of 1 pixel per cm.
- an area corresponding to a record of the database can be represented in the form of a square with 30 pixels on a side, positioned at the corresponding coordinates.
- FIG. 11 shows a 2D graphic representation resulting from the use of the database.
- the database Since the database has been filled in with values corresponding to measurements taken under different conditions, it is possible to limit the representation to certain conditions, for example to the single current access point assigned by the manager of the distributed Wi-Fi network in total. geographic point.
- the reading and therefore the representation may be limited to the only measurement values corresponding to the selected condition.
- the selection is made, for example, through a configuration menu.
- the squares corresponding to the records are colored with a color dependent on the value from the record.
- green color measurement> -65 dBm
- red color measurement> -50 dBm
- blue color measurement> -30 dBm.
- This representation thus shows a background corresponding to a zone, the path leading to the measurements as well as an indication of the quality of the signal.
- Light gray colored areas represent areas not covered by measurements. The user can therefore choose to browse them, or else will recognize inaccessible areas. As the user travels, the coverage of the area will be refined.
- a read of the anchor table (second table in the database) will show the coordinates of each of the UWB anchors in the system. It is therefore possible to draw on the screen, for each of the anchors, a geometric shape, for example a black square with a few pixels in diameter positioned at its location while respecting the same cm / pixel scale.
- the name of the UWB anchor can be transferred to the drawing in the form of text.
- the cartography of the area can be used to associate each square with a name such as “kitchen”, or “living room”, etc.
- the graphical interface will for example be used in association with a cursor management making it possible to select a certain zone of the graph, or certain boxes, and to assign them a caption.
- This graphical representation tool can be coupled and executed simultaneously with the measurement collection method, or executed independently.
- the walls are defined on the cartography by their absence. We therefore obtain a plan of the accommodation with the walls and inaccessible areas, such as wall units, which appear “hollow”.
- the mobile equipment according to the invention is not necessarily a smartphone, but can be any other equipment intended to be moved (by a user or else independently), and for example a tablet, a connected watch, a vacuum cleaner, etc.
- the geolocation of mobile equipment is not necessarily UWB geolocation.
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- Quality & Reliability (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Security & Cryptography (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
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Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1914181A FR3104732B1 (fr) | 2019-12-11 | 2019-12-11 | Equipement mobile réalisant une cartographie de qualité de connexion |
| PCT/EP2020/078833 WO2021115665A1 (fr) | 2019-12-11 | 2020-10-14 | Equipement mobile realisant une cartographie de qualite de connexion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4073537A1 true EP4073537A1 (fr) | 2022-10-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20789160.7A Pending EP4073537A1 (fr) | 2019-12-11 | 2020-10-14 | Equipement mobile realisant une cartographie de qualite de connexion |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20230011448A1 (fr) |
| EP (1) | EP4073537A1 (fr) |
| FR (1) | FR3104732B1 (fr) |
| WO (1) | WO2021115665A1 (fr) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170374587A1 (en) * | 2015-12-07 | 2017-12-28 | Telefonaktiebolaget Lm Ericsson (Publ) | Methods and devices for triggering mobility reference signaling |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008115715A1 (fr) * | 2007-03-16 | 2008-09-25 | Jon Robert Buchwald | Détection de position configurable basée sur une zone |
| US9485737B2 (en) * | 2011-12-26 | 2016-11-01 | Kt Corporation | Controlling radio units to transmitting signal with different transmission power |
| US20140214940A1 (en) * | 2013-01-31 | 2014-07-31 | Sony Corporation | Networked devices matching capabilities with tasks |
| CN105393134B (zh) * | 2013-07-18 | 2018-09-25 | 赫尔环球有限公司 | 使用栅格有效降低无线电地图中访问点数量的方法和装置 |
| US20170272181A1 (en) * | 2014-11-24 | 2017-09-21 | Manoj Gudi | Positioning method and system based on wireless signals |
| KR102519326B1 (ko) * | 2016-12-16 | 2023-04-07 | 삼성전자주식회사 | 무선 통신 시스템에서 채널 측정 방법 및 장치 |
| US10051594B1 (en) * | 2017-08-14 | 2018-08-14 | Verizon Patent And Licensing Inc. | Signal power pattern-based location detection and cell placement |
| US10325124B1 (en) * | 2017-12-07 | 2019-06-18 | Kacchip, LLC | Indoor position and vector tracking system and method |
| US10769836B2 (en) * | 2017-12-27 | 2020-09-08 | Industrial Technology Research Institute | Method and apparatus for establishing coordinate system and data structure product |
| WO2021045565A1 (fr) * | 2019-09-04 | 2021-03-11 | 엘지전자 주식회사 | Procédé et dispositif de mesure de l'emplacement d'un terminal dans un système de communication sans fil |
| US11882066B2 (en) * | 2020-07-27 | 2024-01-23 | Qualcomm Incorporated | Selective cancellation of on-demand positioning reference signal (PRS) occasions |
| WO2022081630A1 (fr) * | 2020-10-13 | 2022-04-21 | Idac Holdings, Inc. | Localisation dans les systèmes sans fil |
-
2019
- 2019-12-11 FR FR1914181A patent/FR3104732B1/fr active Active
-
2020
- 2020-10-14 US US17/784,893 patent/US20230011448A1/en active Pending
- 2020-10-14 EP EP20789160.7A patent/EP4073537A1/fr active Pending
- 2020-10-14 WO PCT/EP2020/078833 patent/WO2021115665A1/fr not_active Ceased
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170374587A1 (en) * | 2015-12-07 | 2017-12-28 | Telefonaktiebolaget Lm Ericsson (Publ) | Methods and devices for triggering mobility reference signaling |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021115665A1 (fr) | 2021-06-17 |
| FR3104732A1 (fr) | 2021-06-18 |
| FR3104732B1 (fr) | 2021-11-19 |
| US20230011448A1 (en) | 2023-01-12 |
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