CN112188454B - Short-range communication method, system, equipment and storage medium based on NB-IoT network - Google Patents
Short-range communication method, system, equipment and storage medium based on NB-IoT network Download PDFInfo
- Publication number
- CN112188454B CN112188454B CN202010972617.5A CN202010972617A CN112188454B CN 112188454 B CN112188454 B CN 112188454B CN 202010972617 A CN202010972617 A CN 202010972617A CN 112188454 B CN112188454 B CN 112188454B
- Authority
- CN
- China
- Prior art keywords
- iot network
- terminal
- terminal device
- terminal equipment
- data
- 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.)
- Active
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/22—Communication route or path selection, e.g. power-based or shortest path routing using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
Abstract
The invention discloses a short-range communication method, a system, equipment and a storage medium based on an NB-IoT network, wherein the method comprises the following steps: detecting all terminal devices in an NB-IoT network, and networking the terminal devices; reading the signal intensity of the terminal equipment in the NB-IoT network, and establishing a signal intensity list; transmitting data by the first terminal device using the NB-IoT network and selecting a second terminal device as a relay route when the data transmission fails; and forwarding the data to be sent by the first terminal equipment through the second terminal equipment. According to the invention, the application terminals in the NB-IoT network are networked, and the optimal relay interaction channel is established according to the signal intensity, so that when the terminal equipment fails to successfully transmit data, the data transmission is completed by using other terminal equipment as a relay route, and the situation that the data transmission of the terminal equipment fails due to the signal coverage problem is avoided. The method and the device can be widely applied to the technical field of indoor NB-IoT communication.
Description
Technical Field
The present invention relates to the field of indoor NB-IoT communication technologies, and in particular, to a NB-IoT network-based short-range communication method, system, device, and storage medium.
Background
Nowadays, the application trend of the internet of things is gradually accelerated, the matched communication requirement is also gradually increased, and the NB-IoT network is widely applied as an important branch in the application of the internet of things because of the operation advantage of low power consumption. With the basic completion of the coverage of the NB-IoT network at the present stage, indoor use scenes and corresponding application terminals based on the NB-IoT network are gradually increased, and in the face of complex indoor scenes, coverage dead areas often exist in the network, so that not all application terminals can successfully complete data interaction, and part of application terminals often cannot successfully complete the task of uplink and downlink of data due to poor coverage of NBiot network signals. How to adapt to various complex indoor scenes by the NB-IoT network under the trend of increasing application terminals is a technical problem which needs to be solved currently.
Disclosure of Invention
To solve at least one of the technical problems in the prior art, the present invention aims to provide a short-range communication method, a system, a device and a storage medium based on an NB-IoT network.
According to a first aspect of embodiments of the present invention, a short-range communication method based on an NB-IoT network includes the steps of:
detecting all terminal devices in an NB-IoT network, and networking the terminal devices;
reading the signal intensity of the terminal equipment in the NB-IoT network, and establishing a signal intensity list;
transmitting data by the first terminal device using the NB-IoT network and selecting a second terminal device as a relay route when the data transmission fails; the second terminal equipment is terminal equipment with optimal signal strength except the first terminal equipment in the signal strength list;
and forwarding the data to be sent by the first terminal equipment through the second terminal equipment.
Further, the step of detecting all terminal devices in the NB-IoT network and networking the terminal devices includes:
detecting all the terminal devices within the NB-IoT network and generating a device list;
and networking the terminal equipment according to the equipment list.
Further, the first terminal device and the second terminal device are selected from the list of devices.
Further, the step of forwarding, by the second terminal device, the data to be sent by the first terminal device includes:
transmitting the data to be transmitted to the second terminal equipment through the first terminal equipment;
the second terminal device sends the data over the NB-IoT network.
According to a second aspect of embodiments of the present invention, a NB-IoT network-based short-range communication system comprises the following modules:
the networking module is used for detecting all terminal equipment in the NB-IoT network and networking the terminal equipment;
a signal strength list generation module, configured to read signal strength of the terminal device in the NB-IoT network, and establish a signal strength list;
a relay selection module, configured to send data through a first terminal device using the NB-IoT network and select a second terminal device as a relay route when the data transmission fails; the second terminal equipment is terminal equipment with optimal signal strength except the first terminal equipment in the signal strength list;
and the forwarding module is used for forwarding the data to be sent by the first terminal equipment through the second terminal equipment.
Further, the networking module includes:
a detection unit, configured to detect all the terminal devices in the NB-IoT network and generate a device list;
and the networking unit is used for networking the terminal equipment according to the equipment list.
Further, the first terminal device and the second terminal device are selected from the list of devices.
Further, the forwarding module includes:
a first sending unit, configured to send the data to be sent to the second terminal device through the first terminal device;
and a second sending unit, configured to send the data by the second terminal device through the NB-IoT network.
According to a third aspect of an embodiment of the invention, an apparatus comprises:
at least one processor;
at least one memory for storing at least one program;
the at least one program, when executed by the at least one processor, causes the at least one processor to implement the method as described in the first aspect.
According to a fourth aspect of embodiments of the present invention, a computer readable storage medium has stored therein a processor executable program for implementing the method of the first aspect when executed by a processor.
The beneficial effects of the invention are as follows: by networking application terminals in the NB-IoT network and establishing an optimal relay interaction channel according to the signal intensity, when the terminal equipment fails to successfully transmit data, the data transmission is completed by using other terminal equipment as a relay route, so that the occurrence of failure of data transmission of the terminal equipment due to the signal coverage problem is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description is made with reference to the accompanying drawings of the embodiments of the present invention or the related technical solutions in the prior art, and it should be understood that the drawings in the following description are only for convenience and clarity of describing some embodiments in the technical solutions of the present invention, and other drawings may be obtained according to these drawings without the need of inventive labor for those skilled in the art.
FIG. 1 is a flow chart of a method provided by an embodiment of the present invention;
FIG. 2 is an application scenario diagram provided by an embodiment of the present invention;
FIG. 3 is a block diagram of an embodiment of the present invention;
fig. 4 is a device connection diagram provided in an embodiment of the present invention.
Detailed Description
The conception, specific structure, and technical effects produced by the present invention will be clearly and completely described below with reference to the embodiments and the drawings to fully understand the objects, aspects, and effects of the present invention.
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
The terms "first," "second," "third," and "fourth" and the like in the description and in the claims and drawings are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the invention. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
First, description and explanation are made on related noun terms involved in the embodiments of the present invention:
NB-IoT: namely, the narrowband internet of things (Narrow Band Internet of Things), which is an important branch of the internet of things, is constructed in a cellular network, only consumes about 180kHz bandwidth, can be directly deployed in a GSM network, a UMTS network or an LTE network, supports cellular data connection of low-power-consumption equipment in a wide area network, and is also called as a low-power-consumption wide area network (LPWAN); NB-IoT supports efficient connections for long standby times, high demand devices for network connections.
The embodiment of the invention provides a short-range communication method based on an NB-IoT network, which can be applied to a terminal, a server and software running in the terminal or the server, such as an application program with an image color constancy processing function. The terminal may be, but is not limited to, a smart phone, a tablet computer, a notebook computer, a desktop computer, a smart speaker, a smart watch, etc. The server may be an independent physical server, a server cluster or a distributed system formed by a plurality of physical servers, or a cloud server providing cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communication, middleware services, domain name services, security services, CDNs, basic cloud computing services such as big data and artificial intelligent platforms. Referring to fig. 1, the method includes the following steps S100 to S400:
s100, detecting all terminal devices in an NB-IoT network, and networking the terminal devices;
alternatively, S100 may be implemented by:
s101, detecting all terminal devices in an NB-IoT network and generating a device list; in the actual application scenario, whether the device list is generated or not is performed according to the requirements of the actual service, for example: when there are few existing terminal devices in the NB-IoT network, this step may be omitted, directly entering the networking link.
S102, networking the terminal equipment according to the equipment list.
It is necessary to specify that the first terminal device and the second terminal device are selected from a list of devices.
S200, reading signal intensity of the terminal equipment in an NB-IoT network, and establishing a signal intensity list;
s300, transmitting data by using an NB-IoT network through a first terminal device and selecting a second terminal device as a relay route when the data transmission fails; the second terminal equipment is the terminal equipment with the optimal signal strength except the first terminal equipment in the signal strength list; in an actual application scenario, after the first terminal device fails to send, a second terminal device available for data interaction is queried through a signal strength list, and selection of the second terminal device is determined according to the magnitude of signal strength of the terminal device in the signal strength list in the NB-IoT network.
S400, forwarding data to be sent by the first terminal equipment through the second terminal equipment; in an actual application scene, the second terminal equipment fulfills the function of relay routing at the moment, and the first terminal equipment cannot send data to the outside through a normal network path, so that the data to be sent is forwarded to the second terminal equipment through a short-distance communication mode after networking, and the second terminal equipment sends the data to the outside through the normal network path.
Alternatively, S400 may be implemented by:
s401, transmitting data to be transmitted to second terminal equipment through first terminal equipment;
s402, the second terminal device sends data through the NB-IoT network.
According to the invention, the application terminals in the NB-IoT network are networked, and the optimal relay interaction channel is established according to the signal intensity, so that when the terminal equipment fails to successfully transmit data, the data transmission is completed by using other terminal equipment as a relay route, and the situation that the data transmission of the terminal equipment fails due to the signal coverage problem is avoided.
Referring to fig. 2, in a specific application scenario, a short-distance communication network is formed by a terminal device elevator a, an elevator B and an access control located in the same NB-IoT network through networking, when the access control tries to send data to a cloud, a data uploading process cannot be realized due to signals, and then the signal intensity of the elevator a and the elevator B in the NB-IoT network is queried through a signal intensity list, and the signal intensity of the elevator a is found to be greater than that of the elevator B according to the query result, so that the access control selects the elevator a as a relay route, and the data which originally needs to be uploaded to the cloud is forwarded to the elevator a, and then the elevator a is replaced by the elevator a to be uploaded to the cloud; it should be noted that, the embodiment is only for illustrating the present invention, and the implementation of the present invention is not limited to the application scenario, and in the actual application scenario, the area covering the NB-IoT network may achieve the technical effect of data relay forwarding through similar steps.
Referring to fig. 3, the present invention also provides a NB-IoT network-based short-range communication system comprising the following modules:
a networking module 301, configured to detect all terminal devices in the NB-IoT network, and network the terminal devices;
optionally, the networking module 301 further comprises the following subunits:
a detection unit, configured to detect all terminal devices in an NB-IoT network and generate a device list;
the networking unit is connected with the detection unit to realize interaction and is used for networking the terminal equipment according to the equipment list;
the first terminal device and the second terminal device are selected from the device list.
The signal strength list generating module 302 is connected with the networking module 301 to realize interaction, and is used for reading the signal strength of the terminal equipment in the NB-IoT network and establishing a signal strength list;
a relay selection module 303, connected to the signal strength list generation module 302, for implementing interaction, and configured to send data through the first terminal device by using the NB-IoT network and select the second terminal device as a relay route when the data transmission fails; the second terminal equipment is the terminal equipment with the optimal signal strength except the first terminal equipment in the signal strength list;
and the forwarding module 304 is connected with the relay selection module 303 to realize interaction and is used for forwarding the data to be sent by the first terminal equipment through the second terminal equipment.
Optionally, the forwarding module 304 further includes the following subunits:
the first sending unit is used for sending the data to be sent to the second terminal equipment through the first terminal equipment;
and the second sending unit is connected with the first sending unit to realize interaction and is used for sending data by the second terminal equipment through the NB-IoT network.
The content of the method embodiment shown in fig. 1 is applicable to the system embodiment, and functions implemented by the system embodiment are the same as those of the system embodiment shown in fig. 1, and the achieved beneficial effects are the same as those of the system embodiment shown in fig. 1.
Referring to fig. 4, the present invention also provides an apparatus comprising:
at least one processor 401;
at least one memory 402 for storing at least one program;
the at least one program, when executed by the at least one processor 401, causes the at least one processor 401 to implement the method as shown in fig. 1.
The content of the method embodiment shown in fig. 1 is applicable to the embodiment of the present device, and the functions specifically implemented by the embodiment of the present device are the same as those of the method embodiment shown in fig. 1, and the beneficial effects achieved by the embodiment of the method shown in fig. 1 are the same as those achieved by the embodiment of the method shown in fig. 1.
The present invention also provides a computer readable storage medium in which a processor executable program is stored, which when executed by a processor is adapted to carry out the method as shown in fig. 1.
The content of the method embodiment shown in fig. 1 is applicable to the storage medium embodiment, and the functions implemented by the storage medium embodiment are the same as those of the method embodiment shown in fig. 1, and the advantages achieved by the method embodiment shown in fig. 1 are the same as those achieved by the method embodiment shown in fig. 1.
It is to be understood that all or some of the steps, systems, and methods disclosed above may be implemented in software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as known to those skilled in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer. Furthermore, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present invention.
Claims (8)
1. A NB-IoT network-based short-range communication method, comprising the steps of:
detecting all terminal devices in an NB-IoT network, and networking the terminal devices;
reading the signal intensity of the terminal equipment in the NB-IoT network, and establishing a signal intensity list;
transmitting data by the first terminal device using the NB-IoT network and selecting a second terminal device as a relay route when the data transmission fails; the second terminal equipment is terminal equipment with optimal signal strength except the first terminal equipment in the signal strength list;
forwarding the data to be sent by the first terminal device through the second terminal device;
the step of detecting all terminal devices in the NB-IoT network and networking the terminal devices includes:
detecting all the terminal devices within the NB-IoT network and generating a device list;
and networking the terminal equipment according to the equipment list.
2. The NB-IoT network-based short-range communication method of claim 1, wherein the first terminal device and the second terminal device are selected from the list of devices.
3. The NB-IoT network-based short-range communication method according to claim 1, wherein the forwarding the data to be sent by the first terminal device through the second terminal device comprises:
transmitting the data to be transmitted to the second terminal equipment through the first terminal equipment;
the second terminal device sends the data over the NB-IoT network.
4. A NB-IoT network-based short-range communication system, comprising:
the networking module is used for detecting all terminal equipment in the NB-IoT network and networking the terminal equipment;
a signal strength list generation module, configured to read signal strength of the terminal device in the NB-IoT network, and establish a signal strength list;
a relay selection module, configured to send data through a first terminal device using the NB-IoT network and select a second terminal device as a relay route when the data transmission fails; the second terminal equipment is terminal equipment with optimal signal strength except the first terminal equipment in the signal strength list;
a forwarding module, configured to forward, by using the second terminal device, the data to be sent by the first terminal device;
the networking module comprises:
a detection unit, configured to detect all the terminal devices in the NB-IoT network and generate a device list;
and the networking unit is used for networking the terminal equipment according to the equipment list.
5. The NB-IoT network-based short-range communication system of claim 4, wherein the first terminal device and the second terminal device are selected from the list of devices.
6. The NB-IoT network-based short-range communication system of claim 4, wherein the forwarding module comprises:
a first sending unit, configured to send the data to be sent to the second terminal device through the first terminal device;
and a second sending unit, configured to send the data by the second terminal device through the NB-IoT network.
7. An apparatus, comprising:
at least one processor;
at least one memory for storing at least one program;
the at least one program, when executed by the at least one processor, causes the at least one processor to implement the method of any of claims 1-3.
8. A computer readable storage medium, in which a processor executable program is stored, characterized in that the processor executable program is for implementing the method according to any of claims 1-3 when being executed by a processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010972617.5A CN112188454B (en) | 2020-09-16 | 2020-09-16 | Short-range communication method, system, equipment and storage medium based on NB-IoT network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010972617.5A CN112188454B (en) | 2020-09-16 | 2020-09-16 | Short-range communication method, system, equipment and storage medium based on NB-IoT network |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112188454A CN112188454A (en) | 2021-01-05 |
| CN112188454B true CN112188454B (en) | 2023-10-03 |
Family
ID=73920757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010972617.5A Active CN112188454B (en) | 2020-09-16 | 2020-09-16 | Short-range communication method, system, equipment and storage medium based on NB-IoT network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112188454B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113364865B (en) * | 2021-06-03 | 2023-04-07 | 湖南快乐阳光互动娱乐传媒有限公司 | Resource acquisition method, device, readable medium and equipment |
| CN113225764B (en) * | 2021-07-08 | 2021-11-09 | 景网技术有限公司 | Offline smart city front-end equipment fault reason feedback and prejudgment method and system |
| CN114222319B (en) * | 2021-12-08 | 2024-03-26 | 天翼物联科技有限公司 | Data transmission method, device and storage medium of internet of things terminal |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107148071A (en) * | 2017-04-19 | 2017-09-08 | 南京邮电大学 | The ubiquitous access method and application system merged based on low-power consumption wan technology and Mesh |
| CN111212454A (en) * | 2019-12-30 | 2020-05-29 | 广州海达安控智能科技有限公司 | Remote terminal control system capable of intelligently switching data transmission modes and storage medium |
| CN111385855A (en) * | 2018-12-27 | 2020-07-07 | 上海新微技术研发中心有限公司 | Routing node selection method, routing node selection system, control device, and storage medium |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109286542A (en) * | 2017-07-21 | 2019-01-29 | 西安中兴新软件有限责任公司 | A kind of wireless device group cut-in method and terminal based on NB-IOT |
| EP3484189B1 (en) * | 2017-11-13 | 2023-01-11 | Robert Bosch GmbH | Road-side network node and method to operate the road-side network node |
-
2020
- 2020-09-16 CN CN202010972617.5A patent/CN112188454B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107148071A (en) * | 2017-04-19 | 2017-09-08 | 南京邮电大学 | The ubiquitous access method and application system merged based on low-power consumption wan technology and Mesh |
| CN111385855A (en) * | 2018-12-27 | 2020-07-07 | 上海新微技术研发中心有限公司 | Routing node selection method, routing node selection system, control device, and storage medium |
| CN111212454A (en) * | 2019-12-30 | 2020-05-29 | 广州海达安控智能科技有限公司 | Remote terminal control system capable of intelligently switching data transmission modes and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112188454A (en) | 2021-01-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112188454B (en) | Short-range communication method, system, equipment and storage medium based on NB-IoT network | |
| US20140205264A1 (en) | Video playing method, terminal and computer readable medium | |
| US9591524B2 (en) | Method and apparatus for transmitting data in network system, and data transmission system | |
| CN103125108B (en) | Set up the system and method that emission control agreement connects | |
| US11956859B2 (en) | Apparatus and method for supporting continuity of edge computing service in mobile network | |
| JP2021158664A (en) | Method, device, and computer program product for error processing for indirect communication | |
| KR102654119B1 (en) | Apparatus and method for providing service at a local area data network | |
| US20170126556A1 (en) | Information transmission method and apparatus, device and storage medium | |
| US20230262143A1 (en) | Relocation of application context to edge data network | |
| CN111356190A (en) | Communication link switching method, device, terminal and computer readable storage medium | |
| US20220116808A1 (en) | Measurement reporting method and apparatus | |
| CN113328789B (en) | Satellite communication method, system, device and storage medium | |
| US20130219021A1 (en) | Predictive caching for telecommunication towers using propagation of identification of items of high demand data at a geographic level | |
| US10405271B2 (en) | Method and apparatus for selecting access network in wireless communication system | |
| US10616811B2 (en) | Methods and apparatus for using a communication protocol based on a wireless network | |
| CN105763463A (en) | Method and device for transmitting link detection message | |
| CN112291501B (en) | Video conference control method and device | |
| CN113891393B (en) | Link self-adaptive transmission method, device, equipment and storage medium | |
| CN112640344B (en) | Hybrid HARQ feedback scheme for self-contained bursts on NR-U | |
| US11777601B1 (en) | Systems and methods for providing wireless communications to a device using both optical and radio frequency transmission | |
| CN114866425B (en) | Method and device for adjusting bandwidth of optical service unit connection | |
| US20230222725A1 (en) | Random access of scene description in iso base media file format (isobmff) files | |
| US20060034316A1 (en) | Energy based information transfer methodology | |
| WO2023185810A1 (en) | Ue route selection policy (ursp) determination method, user equipment, and network-side device | |
| CN108769917B (en) | Service interaction method, equipment and storage medium |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |