CN112055390A - Signal switching method and related device - Google Patents
Signal switching method and related device Download PDFInfo
- Publication number
- CN112055390A CN112055390A CN202010749945.9A CN202010749945A CN112055390A CN 112055390 A CN112055390 A CN 112055390A CN 202010749945 A CN202010749945 A CN 202010749945A CN 112055390 A CN112055390 A CN 112055390A
- Authority
- CN
- China
- Prior art keywords
- terminal
- area
- network
- target activity
- information
- 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.)
- Withdrawn
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/14—Reselecting a network or an air interface
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/34—Reselection control
- H04W36/36—Reselection control by user or terminal equipment
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The embodiment of the application discloses a signal switching method and a related device, which are used for solving the problem that the internet access speed of intelligent equipment is low. The method in the embodiment of the application comprises the following steps: the terminal is connected with a hotspot network; the terminal monitors whether the network connection state within the preset time is a hotspot network connection state or not; if so, the terminal acquires information of a user walking area; the terminal determines a target activity area according to the information of the user walking area; and the terminal judges whether the current activity position is in the target activity area, and if not, the terminal disconnects the hotspot network.
Description
Technical Field
The present disclosure relates to the field of data processing, and in particular, to a method and a related apparatus for switching signals.
Background
The intelligent equipment needs to be connected with a hotspot network or use data traffic when surfing the internet, the speed of surfing the internet of the intelligent equipment is determined by the strength of signals when using the hotspot network or use data traffic, when using the data traffic, the existing intelligent equipment can intelligently switch connected data mobile communication base stations, such as base stations corresponding to 4G and 5G networks, according to the strength of the signals, if the used data network signals are weak, and when detecting that an available hotspot network exists, the intelligent equipment automatically switches to the hotspot network, wherein the available hotspot network refers to a hotspot network which is safe and has a password stored by a user, and after automatically connecting with the hotspot network, the intelligent equipment can reduce the data traffic of the user.
In the existing scheme, the priority of the intelligent device for connecting with the hotspot network is higher than that of the data network, and the intelligent device can not surf the internet by using data traffic under the condition of connecting with the hotspot network, but the surfing speed of the intelligent device is closely related to the strength of a hotspot signal, and when the hotspot signal is weak, the surfing speed of the intelligent device is slow, and the instant message cannot be received immediately.
When the above problem occurs, unless the user manually closes the hotspot receiver, otherwise, the intelligent device will automatically disconnect the hotspot network connection only when the hotspot signal cannot be connected or is very weak, so as to use data communication to surf the internet, therefore, when the hotspot signal strength connected by the intelligent device is general, the internet speed of the intelligent device is relatively slow, so that the user's internet experience is not well affected.
Disclosure of Invention
The embodiment of the application provides a signal switching method and a related device, which can effectively solve the problem that the internet access speed of intelligent equipment is low.
A first aspect of an embodiment of the present application provides a method for signal switching, including:
the terminal is connected with a hotspot network;
the terminal monitors whether the network connection state within the preset time is a hotspot network connection state or not;
if so, the terminal acquires information of a user walking area;
the terminal determines a target activity area according to the information of the user walking area;
and the terminal judges whether the current activity position is in the target activity area, and if not, the terminal disconnects the hotspot network.
Optionally, after the terminal determines the target activity area according to the information of the user walking area, before the terminal determines whether the current activity position is in the target activity area, the method further includes:
and the terminal stores the information of the target activity area to a local database.
Optionally, after the terminal stores the information of the target activity area to the local, the method further includes:
the terminal marks and names the hotspot network;
and the terminal stores the hotspot network into a local database.
Optionally, the determining, by the terminal, the target activity area according to the information about the user walking area includes:
the terminal monitors whether the signal value of the hot spot network in the current active area reaches a preset value or not according to the information of the user walking area;
if yes, the terminal determines that the current activity area is the target activity area.
Optionally, after the terminal disconnects the hotspot network, the method further includes:
the terminal is connected with a data network.
A second aspect of the embodiments of the present application provides a signal switching system, including:
the first connection unit is used for connecting the hotspot network;
the monitoring unit is used for monitoring whether the network connection state in the preset time is a hotspot network connection state;
the acquisition unit is used for acquiring information of a user walking area when the monitoring unit determines that the network connection state in the preset time is the hotspot network connection state;
the determining unit is used for determining a target activity area according to the information of the user walking area;
the judging unit is used for judging whether the current activity position is in the target activity area;
and the disconnection unit is used for disconnecting the hotspot network when the judgment unit determines that the current activity position is not in the target activity area.
Optionally, the signal switching system includes:
the first storage unit is used for storing the information of the target activity area to a local database.
Optionally, the signal switching system includes:
the marking unit is used for marking and naming the hotspot network;
and the second storage unit is used for storing the hotspot network to a local database.
Optionally, the determining unit includes:
the monitoring module is used for monitoring whether the signal value of the hot spot network in the current activity area reaches a preset value or not according to the information of the user walking area;
and the determining module is used for determining the current activity area as the target activity area when the monitoring module determines that the signal value of the hotspot network in the current activity area reaches a preset value.
Optionally, the signal switching system includes:
and the second connecting unit is used for connecting the data network.
A third aspect of the embodiments of the present application provides a signal switching system, including:
the device comprises a processor, a memory, an input and output unit and a bus;
the processor is connected with the memory, the input and output unit and the bus;
the processor specifically performs the following operations:
the terminal is connected with a hotspot network;
the terminal monitors whether the network connection state within the preset time is a hotspot network connection state or not;
if so, the terminal acquires information of a user walking area;
the terminal determines a target activity area according to the information of the user walking area;
and the terminal judges whether the current activity position is in the target activity area, and if not, the terminal disconnects the hotspot network.
Optionally, the processor is further configured to perform the method of the first aspect and the alternatives of the second aspect.
An embodiment of the present application provides a computer-readable storage medium, on which a program is stored, and the program executes the foregoing signal switching method when executed on a computer.
According to the technical scheme, the embodiment of the application has the following advantages: after the terminal is connected with the hotspot network, when the hotspot network is not disconnected within the preset time, the terminal can determine an area connected with the hotspot network according to the activity of a user, hotspot network signals are stronger in the area, the user can have better internet surfing experience, when the current position detected by the terminal exceeds the area, the hotspot network signals are weakened, the internet surfing speed can be reduced, so that the terminal can automatically disconnect the hotspot network connection, a data network is used, the internet surfing speed of the terminal can be improved, and bad influence on the internet surfing experience of the user is reduced.
Drawings
Fig. 1 is a schematic flowchart illustrating a signal switching method according to an embodiment of the present application;
FIG. 2 is a schematic flow chart diagram illustrating a signal switching method according to another embodiment of the present application;
fig. 3 is a schematic flow chart of an embodiment of a signal switching method system in the present application;
fig. 4 is a schematic flow chart of another embodiment of a signal switching method system in the present application;
fig. 5 is a schematic flow chart of another embodiment of a signal switching method system according to the present application.
Detailed Description
The embodiment of the application provides a signal switching method and a related device, which are used for solving the problem that the internet access speed of intelligent equipment is low.
The technical solutions in the present application will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall be covered by the present application.
The method of the present application may be applied to a server, a terminal, or other devices with logic processing capability, and the present application is not limited thereto. For convenience of description, the following description will be given taking the execution body as an example.
Referring to fig. 1, an embodiment of a signal switching method in the present application includes:
101. the terminal is connected with a hotspot network;
before the terminal is connected with a hotspot network, the terminal sends a connection request instruction to a hotspot network transmitter, and after the terminal receives a key input request instruction sent by the hotspot network transmitter, the terminal can be connected with the hotspot network sent by the hotspot network transmitter by acquiring a key and inputting the key, wherein the hotspot network is a WIFI network or a hotspot network sent by certain intelligent equipment.
102. The terminal monitors whether the network connection state within the preset time is a hotspot network connection state or not;
after the terminal is connected to the hotspot network, the terminal monitors whether the network connection state within a preset time is the hotspot network connection state, the preset time is not limited in the present invention, wherein the network connection state is specifically divided into two types, one is the hotspot network connection state, the other is a data network connection state, the data network connection is specifically a signal sent by the terminal connected to the data mobile communication base station, and if the network connection state monitored by the terminal within the preset time is the hotspot network connection state, step 103 is executed.
103. The terminal acquires information of a user walking area;
the method comprises the steps that when the terminal determines that the network connection state is the hotspot network connection state within preset time, the terminal acquires information of a walking area of a user, wherein the terminal determines the information of the walking area of the user according to a walking path of the user by taking any point as a starting point of walking of the user.
104. The terminal determines a target activity area according to the information of the user walking area;
after the information of the user walking area is acquired, the terminal can determine a target activity area according to the information of the user walking area, when the target activity area is determined, the situation that the user activity area is large may exist, and then hot spot network signals at certain positions in the user activity area are weak, the target activity area can be determined from the user walking area through the following method, so that the terminal can receive strong hot spot network signals in the planned user activity area, the phenomenon that the terminal is jammed in the internet is avoided, firstly, in the user walking area, the hot spot signals at certain positions are weak, the user can actively close a hot spot receiver, the terminal records the operation, stores the position area at the moment to the local, and further deletes the position area from the user walking area, secondly, after the terminal acquires the information of the user walking area, the terminal can determine a target activity area in real time according to the stability of the hot spot signal frequency of the current position, for example: when the terminal is at the position, the fluctuation of the received hotspot signal frequency is large, the terminal can judge the stability of the hotspot signal frequency at the position within the preset time, and if the hotspot signal frequency has large fluctuation within the preset time, the terminal can delete the position area from the user walking area; through the method, the terminal can determine the target activity area, and in the target activity area, the hot network signal is strong, so that the internet surfing experience of a user is improved.
105. The terminal judges whether the current activity position is in the target activity area;
after the terminal determines the target activity area, the terminal may monitor whether the current activity location is in the target activity area, the terminal may receive a strong hotspot network signal in the target activity area, and if the terminal determines that the current location is not in the target activity area, step 106 is performed.
106. If not, the terminal disconnects the hotspot network;
when the terminal determines that the current position is not in the target active area or when the following conditions occur, the terminal automatically disconnects the hotspot network, and after the terminal is connected to the hotspot network, the terminal detects that the connected hotspot network does not access the internet within a preset time, so the internet surfing can not be carried out. Thereby saving traffic.
Referring to fig. 2, another embodiment of a signal switching method according to the present application includes:
201. the terminal is connected with a hotspot network;
202. the terminal monitors whether the network connection state within the preset time is a hotspot network connection state or not;
203. the terminal acquires information of a user walking area;
204. The terminal monitors whether the signal value of the hot spot network in the current active area reaches a preset value or not according to the information of the user walking area;
after the terminal acquires the information of the user walking area, a target activity area needs to be further determined, a hot spot network signal in the target activity area is strong, and the terminal does not generate unsmooth jamming when surfing the internet, the target activity area is determined according to the information of the user walking area, and the method can be realized in the following mode.
205. The terminal determines the current activity area as the target activity area;
when the terminal monitors that the network signal value of the hotspot in the current activity area reaches a preset value, the terminal determines that the current activity area is a target activity area.
206. The terminal stores the information of the target activity area to a local database;
and after the terminal determines that the current activity area is the target activity area, storing the information of the target activity area into a local database.
207. And the terminal marks and names the hotspot network.
208. The terminal stores the hotspot network to a local database;
after the terminal marks the hotspot network connected in the target activity area, the terminal names the hotspot network and stores the named hotspot network in a local database, and after the terminal enters the target activity area again, the terminal automatically connects the named hotspot network and calls the information of the target activity area out of the local database, thereby being convenient for users to use.
209. And the terminal judges whether the current activity position is in the target activity area.
210. The terminal disconnects the hotspot network.
211. The terminal is connected with a data network.
After the terminal leaves the target activity area, the signal intensity of the hotspot network can be weakened, the internet speed of a user can be reduced, at the moment, the terminal can automatically disconnect the hotspot network, automatically close the hotspot network receiver and connect the data network, and the data network is used, so that the internet speed of the terminal can be improved, and bad influence on internet experience of the user is reduced.
The above describes the signal switching method in the embodiment of the present application, and the following describes the signal switching system in the embodiment of the present application:
referring to fig. 3, an embodiment of a signal switching system of the present application includes:
301. the first connection unit is used for connecting the hotspot network;
302. the monitoring unit is used for monitoring whether the network connection state in the preset time is a hotspot network connection state;
303. the acquisition unit is used for acquiring information of a user walking area when the monitoring unit determines that the network connection state in the preset time is the hotspot network connection state;
304. the determining unit is used for determining a target activity area according to the information of the user walking area;
305. the judging unit is used for judging whether the current activity position is in the target activity area;
306. and the disconnection unit is used for disconnecting the hotspot network when the judgment unit determines that the current activity position is not in the target activity area.
In this embodiment, the functions of the units correspond to the steps in the embodiment shown in fig. 1, and are not described herein again.
Referring to fig. 4, another embodiment of the signal switching system of the present application includes:
401. the first connection unit is used for connecting the hotspot network;
402. the monitoring unit is used for monitoring whether the network connection state in the preset time is a hotspot network connection state;
403. the acquisition unit is used for acquiring information of a user walking area when the monitoring unit determines that the network connection state in the preset time is the hotspot network connection state;
404. the determining unit is used for determining a target activity area according to the information of the user walking area;
405. the first storage unit is used for storing the information of the target activity area to a local database;
406. the marking unit is used for marking and naming the hotspot network;
407. the second storage unit is used for storing the hotspot network to a local database;
408. the judging unit is used for judging whether the current activity position is in the target activity area;
409. a disconnection unit, configured to disconnect the hotspot network when the determination unit determines that the current activity location is not within the target activity area;
410. a second connection unit for connecting to a data network;
in this embodiment, the determining unit 404 includes:
the monitoring module 4041 is used for monitoring whether the signal value of the hot spot network in the current active area reaches a preset value according to the information of the user walking area;
a determining module 4042, configured to determine, when the monitoring module determines that a signal value of a hotspot network in a current active area reaches a preset value, that the current active area is the target active area;
in this embodiment, the functions of each unit and each module correspond to the steps in the embodiment shown in fig. 2, and are not described herein again.
Referring to fig. 5, the signal switching system in the embodiment of the present application is described in detail below, and the embodiment of the present application provides a signal switching system, including:
a processor 501, a memory 502, an input/output unit 503, and a bus 504;
the processor 501 is connected to the memory 502, the input/output unit 503, and the bus 504;
the processor 501 specifically executes the following operations:
the terminal is connected with a hotspot network;
the terminal monitors whether the network connection state within the preset time is a hotspot network connection state or not;
if so, the terminal acquires information of a user walking area;
the terminal determines a target activity area according to the information of the user walking area;
and the terminal judges whether the current activity position is in the target activity area, and if not, the terminal disconnects the hotspot network.
In this embodiment, the functions of the processor 501 correspond to the steps in the embodiments shown in fig. 1 to fig. 2, and are not described herein again.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and the like.
Claims (10)
1. A method of signal switching, comprising:
the terminal is connected with a hotspot network;
the terminal monitors whether the network connection state within the preset time is a hotspot network connection state or not;
if so, the terminal acquires information of a user walking area;
the terminal determines a target activity area according to the information of the user walking area;
and the terminal judges whether the current activity position is in the target activity area, and if not, the terminal disconnects the hotspot network.
2. The method according to claim 1, wherein after the terminal determines a target activity area according to the information of the user walking area, before the terminal determines whether a current activity location is within the target activity area, the method further comprises:
and the terminal stores the information of the target activity area to a local database.
3. The method according to claim 2, wherein after the terminal saves the information of the target activity area to the local, the method further comprises:
the terminal marks and names the hotspot network;
and the terminal stores the hotspot network into a local database.
4. The method of claim 1, wherein the terminal determining a target activity area according to the information of the user walking area comprises:
the terminal monitors whether the signal value of the hot spot network in the current active area reaches a preset value or not according to the information of the user walking area;
if yes, the terminal determines that the current activity area is the target activity area.
5. The method according to any one of claims 1 to 4, wherein after the terminal disconnects the hotspot network, the method further comprises:
the terminal is connected with a data network.
6. A signal switching system, comprising:
the first connection unit is used for connecting the hotspot network;
the monitoring unit is used for monitoring whether the network connection state in the preset time is a hotspot network connection state;
the acquisition unit is used for acquiring information of a user walking area when the monitoring unit determines that the network connection state in the preset time is the hotspot network connection state;
the determining unit is used for determining a target activity area according to the information of the user walking area;
the judging unit is used for judging whether the current activity position is in the target activity area;
and the disconnection unit is used for disconnecting the hotspot network when the judgment unit determines that the current activity position is not in the target activity area.
7. The signal switching system of claim 6, comprising:
the first storage unit is used for storing the information of the target activity area to a local database.
8. The signal switching system of claim 7, comprising:
the marking unit is used for marking and naming the hotspot network;
and the second storage unit is used for storing the hotspot network to a local database.
9. The signal switching system according to claim 6, wherein the determination unit includes:
the monitoring module is used for monitoring whether the signal value of the hot spot network in the current activity area reaches a preset value or not according to the information of the user walking area;
and the determining module is used for determining the current activity area as the target activity area when the monitoring module determines that the signal value of the hotspot network in the current activity area reaches a preset value.
10. The signal switching system of claim 6, comprising:
and the second connecting unit is used for connecting the data network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010749945.9A CN112055390A (en) | 2020-07-30 | 2020-07-30 | Signal switching method and related device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010749945.9A CN112055390A (en) | 2020-07-30 | 2020-07-30 | Signal switching method and related device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112055390A true CN112055390A (en) | 2020-12-08 |
Family
ID=73601205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010749945.9A Withdrawn CN112055390A (en) | 2020-07-30 | 2020-07-30 | Signal switching method and related device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112055390A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114302399A (en) * | 2021-12-15 | 2022-04-08 | 奇安信科技集团股份有限公司 | Control method and device for WIFI (Wireless Fidelity) sharing hotspot and storage medium |
-
2020
- 2020-07-30 CN CN202010749945.9A patent/CN112055390A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114302399A (en) * | 2021-12-15 | 2022-04-08 | 奇安信科技集团股份有限公司 | Control method and device for WIFI (Wireless Fidelity) sharing hotspot and storage medium |
| CN114302399B (en) * | 2021-12-15 | 2023-12-29 | 奇安信科技集团股份有限公司 | Control method and device for WIFI sharing hot spot and storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8055306B2 (en) | Mobile phone alert system and method | |
| CN105517080B (en) | A kind of network formats switching method, device and terminal | |
| CN103763758B (en) | Data service handling method and data business processing device | |
| CN110249661B (en) | Network connection method and device | |
| CN107592634B (en) | Method and system for realizing multi-network coverage based on cloud SIM technology | |
| CN111447660B (en) | Network roaming control method and device of terminal equipment and cloud control equipment | |
| CN110662279A (en) | Connection state control method, device, first communication node and storage medium | |
| CN108174407B (en) | Communication control method and terminal | |
| CN102149153A (en) | Network automatic switching method and device for mobile communication device terminal | |
| CN106454968A (en) | CSFB-based calling method and apparatus | |
| CN101651973A (en) | Network switching method for mobile communication equipment terminals and system thereof | |
| CN112055390A (en) | Signal switching method and related device | |
| CN107454659B (en) | Terminal identification method, system, terminal equipment and base station | |
| CN112153759B (en) | Communication method and device of dual-card terminal | |
| CN110881205A (en) | Terminal residing method, information transmission method, terminal and network equipment | |
| CN103916986A (en) | Terminal and method for multimode multi-standby | |
| CN111867048A (en) | Registration control method and device of VoWiFi, electronic equipment and server | |
| CN113316205B (en) | Cell switching method, device, electronic equipment and computer readable storage medium | |
| CN112425191B (en) | Network state display control method and device | |
| CN113038506B (en) | Measuring method and device | |
| CN108882335A (en) | Method for connecting network, device and electronic device | |
| CN111818531B (en) | Short message verification code processing method, terminal and third-party system | |
| CN110650259B (en) | Call request response method, device, server, terminal and storage medium | |
| CN103582041B (en) | Operating mode alteration notification method and equipment | |
| CN221306121U (en) | Communication device and terminal equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20201208 |
|
| WW01 | Invention patent application withdrawn after publication |