CN111355522B - Wireless cascade system - Google Patents
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- CN111355522B CN111355522B CN202010181311.8A CN202010181311A CN111355522B CN 111355522 B CN111355522 B CN 111355522B CN 202010181311 A CN202010181311 A CN 202010181311A CN 111355522 B CN111355522 B CN 111355522B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
Abstract
The invention provides a wireless cascade system, which comprises a plurality of application devices; the application devices are respectively suitable for being correspondingly connected to the relay devices in a wireless connection mode; a server, a plurality of said relay devices and said server being in wireless cascade connection with each other, data being adapted to be transmitted between the respective said application device and said server through at least one of the plurality of said relay devices; and a control unit for coordinating data transmission between the plurality of relay devices and the server. The wireless cascade system can coordinate the communication between the plurality of relay devices and the server, so that the data between the plurality of application devices and the server can be stably transmitted.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to a wireless cascade system and a data transmission method.
Background
The wireless concatenation technology is a common extension mode in the field of data transmission, and generally uses WDS (wireless Distribution system) or non-WDS wireless bridging, and aims to connect devices with each other in a wireless manner, extend and extend wireless signals, so as to facilitate data transmission, device control, and improve the range of wireless coverage.
At present, the data transmission method used in wireless cascade connection is usually transparent transmission, that is, the intermediate device does not analyze the transmitted data, and only receives and sends the data. It can be understood that, when the same device receives and transmits data simultaneously, the same device occupies the air interface resource of the device, and the transmission and reception occupy the same air interface, which results in halving the data transmission rate. And once the number of the wireless cascaded devices reaches a certain value, the data transmission efficiency of the last device is exponentially attenuated by 2, which affects the normal transmission of data. It should also be noted that in some scenarios where data transparent transmission is not required, data attenuation will greatly affect the normal use of the device.
For example, when the number of the relay devices cascaded in the conventional cascade system is eight, the transmission rate of data transmission between the last relay device and the server is greatly reduced. For example, when 2.4G2 × 2 wireless concatenation is performed between all relay devices, the data transmission rate between the last relay device and the server is reduced to 1Mb or even lower, which results in the whole network being in a state of paralysis.
In order to solve the problem caused by wireless concatenation, the conventional solution is to connect the relay devices in a wired manner, or to limit the number of stages of wireless concatenation of the relay devices, so as to solve the problem of data transmission rate attenuation caused by the conventional wireless concatenation. However, it should be noted that in some cases, the relay device cannot be wired, or the wired connection is very complicated and inconvenient to implement. Limiting the number of stages of wireless cascading devices will greatly limit the range covered by the wireless devices.
In summary, improvements in wireless cascade systems and data transmission methods are needed.
Disclosure of Invention
An advantage of the present invention is to provide a wireless cascading system, wherein the wireless cascading system can guarantee data transmission under the condition of cascading multiple stages of devices, and improve reliability of data transmission.
Another advantage of the present invention is to provide a wireless cascading system, wherein the wireless cascading system can coordinate data transmission between a plurality of relay devices and a server, so that data transmission between the plurality of relay devices and the server can be efficient.
Another advantage of the present invention is to provide a wireless cascading system, wherein the wireless cascading system can determine a data transmission time avoiding other relay devices in response to a data transmission request of a relay device, ensuring that data is transmitted efficiently.
Another advantage of the present invention is to provide a wireless cascading system, wherein the wireless cascading system is simple in structure and easy to implement.
Accordingly, to achieve at least one of the above objects, the present invention provides a wireless cascade system comprising:
a plurality of application devices;
the application devices are respectively suitable for being correspondingly connected to the relay devices in a wireless connection mode;
a server, a plurality of said relay devices being adapted to wirelessly cascade with said server, data being adapted to be transmitted between a respective said application device and said server via at least one of said plurality of said relay devices; and
a control unit to coordinate data transmission between the plurality of relay devices and the server.
In some preferred embodiments of the present invention, the control unit is configured to control other relay devices to avoid a first time for data transmission with the server in response to the relay device performing data transmission with the server at the first time.
In some preferred embodiments of the present invention, the control unit is configured to control other relay devices to avoid uploading data to the server at the first time in response to the relay device uploading data to the server at the first time.
In some preferred embodiments of the present invention, the control unit is configured to control other relay devices to avoid downloading data from the server at the first time in response to downloading data from the server at the first time by one of the relay devices.
In some preferred embodiments of the present invention, the control unit includes a first time determination module, which is configured to determine a data transmission time corresponding to a data transmission request in response to a relay device sending the data transmission request to the server, wherein the relay device is capable of avoiding data transmission between other relay devices and the server at the data transmission time.
In some preferred embodiments of the present invention, the first time determining module is configured to determine a first data download time corresponding to a data download request sent by a relay device to the server, where downloading data from the server by a relay device at the first data download time can avoid data transmission between other relay devices and the server.
In some preferred embodiments of the present invention, the first time determining module is further configured to determine a first data uploading time corresponding to the long data transmission request in response to a data uploading request sent by a relay device to the server, where uploading data to the server by a relay device at the first data uploading time can avoid data transmission between other relay devices and the server.
In some preferred embodiments of the present invention, the control unit further includes a second time determination module, configured to determine a second data download time later than the first data download time in response to a first data download request sent by an application device to the relay device, where the application device is capable of downloading data corresponding to the first data download request from the corresponding relay device at the second data download time.
In some preferred embodiments of the invention, the first time determination module of the control unit is integrated in the server.
In some preferred embodiments of the present invention, the number of the second time determination modules of the control unit corresponds to the number of the relay devices, and one of the relay devices is integrated with one of the second time determination modules.
According to another aspect of the present invention, the present invention further provides a wireless cascade system, which is configured to perform a communication method, wherein the communication method includes:
acquiring a data transmission request sent by a relay device to a server; and
determining a data transmission time based on the data transmission request, wherein the relay device can avoid data transmission between other relay devices and the server when performing data transmission with the server at the first data transmission time.
Drawings
Fig. 1 is a block diagram of a wireless cascading system in accordance with a preferred embodiment of the present invention.
Fig. 2 is a schematic diagram of the cascade of the wireless cascade system according to the above preferred embodiment of the present invention.
Fig. 3 is a flow chart of a repeater acquisition agent process block diagram of the wireless cascading system according to the above-described preferred embodiment of the present invention.
Fig. 4 is a block diagram flow chart of a data downloading process of the wireless cascade system according to the above preferred embodiment of the present invention.
Fig. 5 is a block diagram flowchart of a data uploading process of the wireless cascade system according to the above preferred embodiment of the present invention.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.
It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.
Referring to fig. 1 to fig. 5 of the specification, the wireless cascade system 100 and the wireless cascade method provided by the present invention are illustrated, and compared with the conventional wireless cascade system, the wireless cascade system 100 provided by the present invention can avoid a decrease in data transmission rate caused by multi-stage cascade, and can ensure that data can be effectively transmitted under the condition of multi-stage cascade.
Specifically, the Wireless cascade system 100 includes a server 10, a plurality of relay devices 20, application devices 30 corresponding to the plurality of relay devices 20, and a control unit 40, wherein the plurality of relay devices 20 are connected to the server 10 in a Wireless (Wireless-Fidelity) cascade manner, and the plurality of application devices 30 are respectively connected to the plurality of relay devices 20, so as to perform data transmission between the corresponding relay devices 20 and the server 10.
Illustratively, in the preferred embodiment, the wireless cascade system 100 is described by taking the example that the wireless cascade system includes five relay devices 20, that is, a first relay device 21, a second relay device 22, a third relay device 23, a fourth relay device 24, and a fifth relay device 25. Accordingly, the wireless cascade system 100 includes five of the application devices 30, i.e., a first application device 31, a second application device 32, a third application device 33, a fourth application device 34, and a fifth application device 35. Optionally, the number of the relay devices 20 of the wireless cascade system 100 can also be implemented as two, three, four, or six, and correspondingly, the number of the application devices 30 can also be implemented as two, three, four, or six, and it should be understood that the number of the relay devices 20 or the application devices 30 should not be construed as a limitation to the present invention.
Referring to fig. 2 of the specification, the first relay device 21 is connected to the server 10 by a wireless connection, the second relay device 22 is connected to the first relay device 21 by a wireless connection, the third relay device 23 is connected to the second relay device 22 by a wireless connection, the fourth relay device 24 is connected to the third relay device 23 by a wireless connection, and the fifth relay device 25 is connected to the fourth relay device 24 by a wireless connection.
With reference to fig. 2 of the description, the first application device 31 is adapted to be connected to the first relay device 21 by means of a wireless connection; the second application device 32 is adapted to connect to the second relay device 22 by means of a wireless connection; the third application device 33 is adapted to connect to the third relay device 23 by means of a wireless connection; the fourth application device 34 is adapted to connect to the fourth relay device 24 by means of a wireless connection; the fifth application device 35 is adapted to connect to the fifth relay device 25 by means of a wireless connection.
The first application device 31 is adapted to upload data to the server 10 through the first relay device 21 or download data from the server 10; the second application device 32 is adapted to upload data to the server 10 or download data from the server 10 via the second relay device 22 and the first relay device 21; the third application device 33 is adapted to upload data to the server 10 or download data from the server 10 through the third relay device 23, the second relay device 22 and the first relay device 21; the fourth application device 34 is adapted to upload data to the server 10 or download data from the server 10 through the fourth relay device 24, the third relay device 23, the second relay device 22 and the first relay device 21; the fifth application device 35 is adapted to upload data to the server 10 or download data from the server 10 via the fifth relay device 25, the fourth relay device 24, the third relay device 23, the second relay device 22 and the first relay device 21.
The control unit 40 is operatively connected to the server 10, the plurality of relay devices 20, and the plurality of application devices 30, respectively, and the control unit 40 is configured to coordinate communications between the plurality of servers 10 and the plurality of relay devices 20, so as to avoid a reduction in data transmission rate between the relay devices 20 and the servers 10 caused by multi-level cascading of the plurality of relay devices 20, and effectively ensure effective transmission of data between the servers 10 and the plurality of relay devices 20. That is, the control unit 40 is configured to control the other relay devices 20 to avoid the first time to perform data transmission with the server 10 in response to the relay device 20 performing data transmission with the server 10 at the first time.
Specifically, the control unit 40 is configured to, in response to a relay device 20 uploading data to the server 10 at the first time, control other relay devices 20 to avoid uploading data to the server 10 at the first time; the control unit 40 is further configured to control the other relay devices 20 to avoid downloading data from the server 10 at the first time in response to downloading data from the server 10 at the first time by one of the relay devices 20.
Referring to fig. 2 of the specification, it should be noted that, when data is transmitted between the plurality of application devices 30 and the server 10, the plurality of relay devices 20 first become proxy servers of the server 10. The process in which the relay device 21 becomes a proxy server for the server 10 includes:
101: sending, by the device 20 to be relayed, a server information acquisition request to the server 10, where the server information acquisition request is used to acquire server information of the server 10;
102: after acquiring the server information acquisition request, the server 10 sends the server information of the server 10 to the relay device 20;
103: after acquiring the service information of the server 10, the relay device 20 sends a proxy request to the server 10, for requesting to become a proxy server of the server 10; and
104: after the server 10 acquires the proxy request, network information is synchronized to the relay device 20, so that the relay device 20 becomes a proxy server of the server 10.
It should be noted that, after the communication is established between the relay device 20 and the server 10 and becomes the proxy server of the server 10, the communication between the relay device 20 and the server 10 needs to be kept alive, and the communication connection state between the relay device 20 and the server 10 needs to be detected.
Further, the process of the application device 30 downloading data at the server 10 includes:
201: firstly, the application device 30 sends a first data downloading request to the corresponding relay device 20;
202: the control unit 40 obtains the first data downloading request, and when the relay device 20 has first data corresponding to the first data downloading request, the control unit 40 controls the relay device 20 to send the first data to the application device 30, so that the application device 30 completes downloading of the corresponding data;
203: when the relay apparatus 20 does not have the first data corresponding to the first data download request, the control unit 40 controls the relay apparatus 20 to send a second data download request corresponding to the first data download request to the server 10 for acquiring the first data from the server 10;
204: the control unit 40 determines a first data download time for the server 10 to transmit the first data to the relay device 20, and controls the server 10 to send the first data download time to the relay device 20;
205: after the relay device 20 obtains the first data download time from the server 10, the control unit 40 determines a second data download time, which is later than the first data download time, and controls the relay device 20 to send the second data download time to the application device 30, so that the application device 30 receives the first data corresponding to the first data download request from the relay device 20 at the second data download time;
206: at the first data download time, the relay device 20 downloads the first data from the server 10; and
207: at the second data download time, the application device 30 downloads the first data from the relay device 20.
It is to be noted that, after the relay device 20 downloads the first data from the server 10, the application device 30 downloads the first data from the relay device 20, so that the application device 30 can download the first data from the relay device 20.
Further, the control unit 40 can store the first data download time when the relay device 20 downloads the first data from the server 10, and can control the server 10 to perform data transmission with other relay devices 20 at the first data download time, so as to ensure data transmission between the current relay device 20 and the server 10 and ensure efficiency of data transmission.
Further, the process of uploading data to the server 10 by the application device 30 includes:
301: sending, by the application device 30, a first data upload request to the corresponding relay device 20, so as to upload a second data to the server 10;
302: after acquiring the first data upload request, the relay device 20 sends a first upload reply corresponding to the first data upload request to the application device 30;
303: the relay device 20 sends a second data upload request corresponding to the first data upload request to the server 10;
304: after the application device 30 acquires the first upload reply from the relay device 20, upload the second data to the relay device 20;
305: after the server 10 obtains the second data upload request from the relay device 20, the control unit 40 determines a first data upload time and controls the server 10 to send the first data upload time to the relay device 20, where the relay device 20 can upload the second data to the server 10 at the first data upload time.
It should be noted that, after determining the first data uploading time for the relay device 20 to upload the second data to the server 10, the control unit 40 stores the first data uploading time and notifies other relay devices 20 to avoid the first data uploading time. That is, the server 10 is not allowed to establish data upload contact with the other relay devices 20 at the first data upload time, so as to ensure the efficiency of the second data upload.
It should be further noted that after the application device 10 uploads the second data to the relay device 20, the relay device 20 sends the data to the application device 10 for subsequent backup after receiving the data; after the backup is completed, the completion of the backup is notified to the application device 30, and the data may be deleted. After the relay device 20 finishes uploading the second data to the server 10, the server 10 notifies the relay device 20 that the data uploading is finished and backs up the synchronization.
Specifically, the control unit 40 includes a first time determination module 41 and a second time determination module 42, where the second time determination module 42 is configured to determine a time when the application device 30 uploads data to the relay device 20 and a time when the application device downloads data from the relay device 20; the first time determination module 41 is configured to determine a time when the relay device 20 uploads data to the server 10 and a time when data is downloaded from the server 10.
Further, after the relay device 20 sends the second data downloading request to the server 10, the first time determining module 41 determines the first data downloading time, so as to allow the relay device 20 to download the first data from the server 10 at the first data downloading time. And the relay device 20 downloads data from the server 10 at the first data download time so as to avoid data transmission between the other relay devices 20 and the server 10.
Accordingly, after the relay device 20 sends the second data upload request to the server 10, the first time determination module 41 determines the first data upload time, so as to allow the relay device 20 to upload the second data to the server 10 at the first data upload time. And the relay device 20 uploads data to the server 10 at the first data upload time can avoid data transmission between the other relay devices 20 and the server 10.
After the application device 30 sends the first data download request to the relay device 20 and the relay device 20 obtains the first data download time, the second time determination module 42 of the control unit 40 determines the second data download time later than the first data download time for allowing the application device 30 to download the first data from the relay device 20 at the second data download time.
When the application device 30 sends the first data upload request to the relay device 20, the second time determination module 42 determines a second data upload time that is earlier than the first data upload time, so as to allow the application device 30 to upload the second data to the relay device 20, and after the application device 30 uploads the second data to the relay device 20, the relay device 20 uploads the second data to the server 10 at the second data upload time.
Further, the first time determination module 41 can further store the first data download time and the first data upload time, so as to control another relay device 20 to avoid the first data download time and the first data upload time when the relay device 20 and the server 10 perform data transmission at the first data download time and the first data upload time.
It is to be noted that, in the present preferred embodiment, the number of the second time determination modules 42 of the control unit 40 is plural, and the number of the second time determination modules 42 corresponds to the number of the relay devices 20. Further, in the preferred embodiment, each of the relay devices 20 is integrated with one of the second time determination modules 42, and the first time determination module 41 is integrated with the server 10.
Further, the application device 30 further comprises a first request module 36, and the relay device 20 further comprises a second request module 26, wherein the first request module 36 of the application device 30 is operatively connected to the second request module 26 of the relay device 20, and the first request module 36 of the application device 30 is configured to send the first data download request and the first data upload request to the second request module 26 of the relay device 20.
The server 10 further includes a third request module 11, and the relay device 20 is further configured to process the first data download request and the first data upload request acquired from the application device 30 to generate the second data download request corresponding to the first data download request, the second data upload request corresponding to the first data upload request, and send the second data download request and the second data upload request to the third request module 11 of the server 10.
The third request module 11 of the server 10 is operatively connected to the first time determination module 41 of the control unit 40. The third request module 11 can send the acquired second data download request and the acquired second data upload request to the first time determination module 41 of the control unit 40. The first time determination module 41 of the control unit 40 is adapted to determine the first data download time corresponding to the second data download request and the second data long transfer time corresponding to the second data upload request based on the data transfer status of the server 10.
After the first time determination module 41 of the control unit 40 determines the first data download time and the first data upload time, the control unit 40 is further adapted to send the first data download time and the first data upload time to the first time determination module 42 of the control unit 40. The first time determination module 42 is adapted to generate the second data download time corresponding to the first data download time and the second data upload time corresponding to the first data upload time based on the first data download time and the first data upload time.
It should be noted that the second data upload time when the application device 30 sends the second data to the relay device 20 is earlier than the second data upload time when the relay device 30 sends the second data to the server 10.
The application device 30 further comprises a first data transmission module 37, the relay device 20 further comprises a second data transmission module 27, and the server 10 further comprises a third data transmission module 12. The first data transmission module 37 is adapted to be communicatively connected to the second data transmission module 27, and the second data transmission module 27 is further adapted to be communicatively connected to the third data transmission module 12, that is, data can be transmitted between the first data transmission module 37 and the second data transmission module 27, and data can also be transmitted between the second data transmission module 27 and the third data transmission module 12.
Further, the application device 30 further comprises a first keep-alive module 38, the relay device 20 further comprises a second keep-alive module 27, and the server 10 further comprises a third keep-alive module 13, wherein the first keep-alive module 38 and the second keep-alive module 28 are used for keeping alive communication between the application device 30 and the relay device 20, and the second keep-alive module 28 and the first keep-alive module 38 are used for keeping alive communication between the relay device 20 and the server 10.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the terminology used in the description above is not necessarily meant to be the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The objects of the invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.
Claims (8)
1. A wireless cascade system, comprising
A plurality of application devices;
the application devices are respectively suitable for being correspondingly connected to the relay devices in a wireless connection mode;
a server, a plurality of said relay devices being adapted to wirelessly cascade with said server, data being adapted to be transmitted between a respective said application device and said server via at least one of said plurality of said relay devices; and the control unit is used for responding to the data transmission between the relay equipment and the server at a first time and controlling other relay equipment to avoid the data transmission between the first time and the server.
2. The wireless cascading system of claim 1, wherein the control unit is configured to control other relay devices to refrain from uploading data to the server at the first time in response to the relay device uploading data to the server at the first time.
3. The wireless cascade system of claim 2, wherein the control unit is configured to control other relay devices to avoid downloading data from the server at the first time in response to a relay device downloading data from the server at the first time.
4. The wireless cascade system of claim 1, wherein the control unit comprises a first time determination module configured to determine a data transmission time corresponding to a data transmission request in response to a relay device sending the data transmission request to the server, wherein the relay device is capable of avoiding data transmission between other relay devices and the server at the data transmission time.
5. The wireless cascading system of claim 4, wherein the first time determining module is configured to determine a first data download time corresponding to a data download request sent by a relay device to the server, wherein the data download from the server by a relay device at the first data download time can avoid data transmission between other relay devices and the server.
6. The wireless cascading system of claim 5, wherein the first time determining module is further configured to determine a first data upload time corresponding to the data upload request in response to a relay device sending a data upload request to the server, wherein uploading data to the server by a relay device at the first data upload time may avoid data transmission between other relay devices and the server.
7. The wireless cascading system of claim 6, wherein the control unit further comprises a second time determination module configured to determine a second data download time later than the first data download time at which the application device can download data corresponding to the first data download request from the corresponding relay device in response to the application device sending a first data download request to the relay device.
8. The wireless cascade system of claim 7, wherein the number of the second time determination modules of the control unit corresponds to the number of the relay devices, a relay device being integrated with a second time determination module.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101262268A (en) * | 2007-03-09 | 2008-09-10 | 大唐移动通信设备有限公司 | Method and relay device for realizing wireless link orthogonality supporting relay cellular system |
| CN101877712A (en) * | 2009-04-29 | 2010-11-03 | 美商定谊科技公司 | Data transmission-controlling method, server and terminal equipment |
| CN109150338A (en) * | 2017-06-16 | 2019-01-04 | 华为技术有限公司 | Method for transmitting signals, relevant apparatus and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7965758B2 (en) * | 2006-09-15 | 2011-06-21 | Itron, Inc. | Cell isolation through quasi-orthogonal sequences in a frequency hopping network |
| KR101445078B1 (en) * | 2007-10-04 | 2014-11-03 | 삼성전자주식회사 | Relay system and data frame structure for the relay system |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101262268A (en) * | 2007-03-09 | 2008-09-10 | 大唐移动通信设备有限公司 | Method and relay device for realizing wireless link orthogonality supporting relay cellular system |
| CN101877712A (en) * | 2009-04-29 | 2010-11-03 | 美商定谊科技公司 | Data transmission-controlling method, server and terminal equipment |
| CN109150338A (en) * | 2017-06-16 | 2019-01-04 | 华为技术有限公司 | Method for transmitting signals, relevant apparatus and system |
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Denomination of invention: Wireless cascade system Effective date of registration: 20231025 Granted publication date: 20220308 Pledgee: Industrial Bank Co.,Ltd. Shanghai Huashan sub branch Pledgor: NAWA ELECTRONICS (SHANGHAI) CO.,LTD. Registration number: Y2023310000674 |