CN114500669A - Real-time communication method and system based on Internet of things, storage medium and electronic equipment - Google Patents
Real-time communication method and system based on Internet of things, storage medium and electronic equipment Download PDFInfo
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- CN114500669A CN114500669A CN202111681918.3A CN202111681918A CN114500669A CN 114500669 A CN114500669 A CN 114500669A CN 202111681918 A CN202111681918 A CN 202111681918A CN 114500669 A CN114500669 A CN 114500669A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/04—Protocols for data compression, e.g. ROHC
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- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16Y—INFORMATION AND COMMUNICATION TECHNOLOGY SPECIALLY ADAPTED FOR THE INTERNET OF THINGS [IoT]
- G16Y30/00—IoT infrastructure
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
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Abstract
The invention relates to the technical field of communication, in particular to a real-time communication method and system based on the Internet of things, a storage medium and electronic equipment. The real-time communication method based on the Internet of things comprises the following steps: step 1, the terminal of the Internet of things requests to connect a data center, and if the connection is successful, identity identification information is sent to the data center; step 2, the data center verifies the identity identification information, and if the identity identification information passes the verification, the data center responds to the Internet of things terminal and establishes connection; step 3, the terminal of the Internet of things and the data center perform data subscription interaction, process the full data to be sent through a data compression algorithm, and periodically transmit the compressed full data; the terminal of the Internet of things is connected with the data center through a TCP/IP protocol. The invention is used for real-time data exchange between the terminal of the Internet of things and the data center, and can save flow while guaranteeing real-time performance.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a real-time communication method and system based on the Internet of things, a storage medium and electronic equipment.
Background
In the application scenario of energy management and control systems such as electric meters and water meters, high real-time performance is generally required due to the control operation, and the flow limitation is particularly strict due to the large number of the energy management and control systems.
However, in the existing communication scene of the internet of things, communication protocols disclosed by HTTP, MQTT, DDS, and the like are generally used, for example, HTTP is suitable for only requiring a data lookup function and does not support control; the MQTT supports two-way communication, but the real-time property is difficult to guarantee; the DDS has high real-time performance, but it is difficult to satisfy a scene with very strict traffic requirements.
Disclosure of Invention
In order to solve the above problems, the present invention mainly aims to provide a real-time communication method and system based on the internet of things, a storage medium, and an electronic device, which are used for real-time data exchange between a terminal of the internet of things and a data center, and can save traffic while ensuring real-time performance.
In order to achieve the purpose, the invention adopts the technical scheme that:
a real-time communication method based on the Internet of things comprises the following steps:
step 1, the terminal of the Internet of things requests to connect a data center, and if the connection is successful, identity identification information is sent to the data center;
step 2, the data center verifies the identity identification information, and if the identity identification information passes the verification, the data center responds to the Internet of things terminal and establishes connection;
step 3, the terminal of the Internet of things and the data center perform data subscription interaction, process the full data to be sent through a data compression algorithm, and periodically transmit the compressed full data;
wherein, the first and the second end of the pipe are connected with each other,
and the Internet of things terminal is connected with the data center through a TCP/IP protocol.
Further, in step 1, if the connection fails, the connection is retried after a time interval T1.
Further, in the step 2, if the verification fails, the connection is disconnected, and after an interval T2, the internet of things terminal retries to request to connect to the data center.
Further, the real-time communication method based on the Internet of things comprises the following steps:
after the internet of things terminal is connected with the data center, if no data exist in the link after the time T3, a heartbeat verification packet is sent to the data center regularly; after sending the heartbeat verification packet to the data center, if no correct response message is received, the interval time T4 is sent again, and if no response message is received for N consecutive times, the connection is disconnected.
Further, in the step 3, before the terminal of the internet of things receives the data subscription instruction, the terminal of the internet of things sends an online notification at an interval of time T5 to remind the data center of performing subscription processing.
Further, in step 3, after the transmission of the full data, if the transmission is not confirmed, retry is performed after an interval T6; if confirmed, the previously accumulated unsent packets are transmitted.
Further, the data compression algorithm adopts a zlib compression algorithm.
The present invention also provides a computer-readable storage medium having stored thereon a computer program characterized in that: the computer program is executed by a processor to perform the real-time communication method based on the internet of things as described above.
The present invention also provides an electronic device characterized by comprising: a processor, a memory, and a program, wherein the program is stored in the memory and configured to be executed by the processor, the program comprising instructions for performing the internet of things based real-time communication method as described above.
The invention also provides a real-time communication system based on the Internet of things, which is characterized in that: comprising the real-time communication method based on the Internet of things as described above.
The invention has the beneficial effects that:
the invention comprises the following steps: step 1, the terminal of the Internet of things requests to connect a data center, and if the connection is successful, identity identification information is sent to the data center; step 2, the data center verifies the identity identification information, and if the identity identification information passes the verification, the data center responds to the Internet of things terminal and establishes connection; step 3, performing data subscription interaction between the terminal of the internet of things and the data center, processing full data to be sent through a data compression algorithm, and periodically transmitting the compressed full data; the connection between the terminal of the Internet of things and the data center adopts a TCP/IP protocol connection, and the data center is used as a TCP server and is in long connection with the terminal of the Internet of things, so that the real-time performance of a bidirectional instruction is guaranteed; meanwhile, the whole data is compressed through a data compression algorithm, so that the flow consumed during data transmission can be saved.
Drawings
Fig. 1 is a flow chart of a real-time communication method based on the internet of things according to the invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.
Referring to fig. 1, a real-time communication method based on the internet of things includes the following steps:
step 1, the terminal of the Internet of things requests to connect a data center, and if the connection is successful, identity identification information is sent to the data center;
step 2, the data center verifies the identity identification information, and if the identity identification information passes the verification, the data center responds to the Internet of things terminal and establishes connection;
step 3, the terminal of the Internet of things and the data center perform data subscription interaction, process the full data to be sent through a data compression algorithm, and periodically transmit the compressed full data;
wherein the content of the first and second substances,
the Internet of things terminal is connected with the data center through a TCP/IP protocol;
in the scheme, the connection between the terminal of the internet of things and the data center adopts a TCP/IP protocol connection, and the data center is used as a TCP server and is in long connection with the terminal of the internet of things, so that the real-time performance of a bidirectional instruction is guaranteed; meanwhile, the whole data is compressed through a data compression algorithm, so that the flow consumed during data transmission can be saved.
It should be emphasized that, when the terminal of the internet of things or the data center needs to be disconnected due to maintenance upgrade or other reasons, the tcp connection is directly disconnected, and the two parties will reenter the connection process.
Further, in step 1, if the connection fails, the connection is retried after an interval T1;
in the embodiment, after the terminal of the internet of things is powered on, the terminal of the internet of things immediately tries to connect with the data center, and if the connection fails, the terminal of the internet of things repeatedly retries at a fixed time interval of 1 minute. Assuming that the data center can not be successfully connected, the maximum 2.5M flow is estimated to be consumed in 31 days according to 60 bytes consumed in each connection attempt, and the flow is greatly saved.
Further, in the step 2, if the verification fails, the connection is disconnected, and after an interval T2, the internet of things terminal retries to request to connect to the data center;
in the above embodiment, the time T2 is 5 minutes, and assuming that the verification is not successful, the maximum 1M traffic is estimated to be consumed in 31 days according to 120 bytes consumed for each connection and verification, which saves traffic very much.
Further, the real-time communication method based on the internet of things comprises the following steps:
after the internet of things terminal is connected with the data center, if no data exists in the link after the time T3 is exceeded, a heartbeat verification packet is sent to the data center at regular time; after the heartbeat verification packet is sent to the data center, if no correct response message is received, the interval time T4 is sent again, and if no response message is received for N times continuously, the connection is disconnected;
in the above example, time T3 was 5 minutes, time T4 was 1 minute, and N was 3; namely:
when no data exists in the link for more than 5 minutes, the terminal of the Internet of things immediately sends a heartbeat verification packet, if no correct response message is received, the heartbeat verification packet is sent again at an interval of 1 minute, and the connection is disconnected when no response is received for 3 times continuously, and then the connection process is re-entered. And the data center judges that the connection is directly disconnected when no message is received for 8 minutes continuously.
Further, in the step 3, before the terminal of the internet of things receives the data subscription instruction, an online notification is sent every interval T5 to remind the data center to perform subscription processing;
in the above embodiment, the time T5 is 5 minutes, and it should be noted that:
after the connection is successfully established, the data center needs to subscribe the data of the terminal of the Internet of things, and then the two parties enter a formal data communication flow; and the terminal of the Internet of things sends an online notification every 5 minutes before receiving the data subscription instruction, and is used for reminding the data center of subscribing.
Further, in the step 3, after the full data is transmitted, if no confirmation is obtained, retry is performed after an interval time T6 (5 minutes at time T6); if confirmed, the previously accumulated unsent packets are transmitted.
The online notification and the periodic transmission of the application need to strictly execute the following time processing:
before receiving a data subscription instruction, sending an online notification at a fixed interval of 5 minutes;
when no subscription instruction is received within 15 minutes continuously, the connection is disconnected;
under the condition of receiving a subscription instruction, sending 1 packet of full data in fixed 5 minutes, and sending the latest packet each time;
after the full data is sent, if the confirmation is not obtained within 20 seconds, retrying after 5 minutes;
after the full data is sent, if the confirmation is obtained within 20 seconds, sending the unsent data packets accumulated between 20 seconds at intervals;
in summary, if the communication is interrupted for 1 day, it ideally takes about 4 hours to complete the continuous transmission of data.
Further, the data compression algorithm adopts a zlib compression algorithm, and it should be noted that, in the communication process, the instructions for comparing the consumed traffic mainly include a full amount of data packets, a change data packet, a configuration detail packet, a history data packet, and the like. In order to improve the compatibility of the communication packet, the data format uniformly adopts a json form, and a zlib compression algorithm is used to achieve the purpose of further saving the flow. Each data mainly comprises information such as value, quality, refreshing time and the like, 100 data points are sent through testing to occupy about 1K, flow is greatly saved, the data points are estimated according to one packet every 5 minutes, and the total data packets occupy about 9M of flow in 31 days.
According to the real-time communication method based on the Internet of things, other instructions (such as request configuration version, request configuration details, control command, request offline data and the like) in the communication process can respond immediately after receiving the instructions due to the long connection state of tcp.
The above instructions are further described as follows:
(1) request configuration
The request configuration is used for acquiring the configuration details of the terminal equipment of the Internet of things on line, and the communication process is as follows:
the data center requests a configuration version of the terminal of the Internet of things;
after the configuration version of the terminal of the Internet of things is acquired, the configuration version is compared with the local cache version,
if the cache version is inconsistent with the local cache version, the data center further requests configuration details of the terminal of the Internet of things;
after the configuration details are obtained, the configuration information is cached locally again for processing of the service system.
(2) Control command
The control command is used for controlling operation of the terminal equipment of the internet of things, for example, controlling a switch of an intelligent lamp, adjusting the temperature of an intelligent air conditioner and the like, and the communication process is as follows:
the data center sends a control command to the terminal of the Internet of things,
the terminal of the Internet of things immediately executes processing after receiving the command and feeds back a processing result to the data center;
since the communication method of the invention is a tcp long connection mode, the control command can respond in milliseconds.
(3) Requesting offline data
When the terminal equipment of the internet of things is disconnected for a period of time, some state data in the disconnection period are generally cached locally, offline data are requested to be used for continuously transmitting the cached data in the disconnection period after communication is recovered, and the continuity of the data is guaranteed; the communication process is as follows:
the data center sends a request for offline data,
and the terminal of the Internet of things returns the requested offline data after receiving the command.
The present invention also provides a computer-readable storage medium having stored thereon a computer program characterized in that: the computer program is executed by a processor to perform the real-time communication method based on the internet of things as described above.
The present invention also provides an electronic device characterized by comprising: a processor, a memory, and a program, wherein the program is stored in the memory and configured to be executed by the processor, the program comprising instructions for performing the internet of things based real-time communication method as described above.
The invention also provides a real-time communication system based on the Internet of things, which is characterized in that: the real-time communication method based on the Internet of things comprises the real-time communication method based on the Internet of things.
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner; those skilled in the art can readily practice the invention as shown and described in the drawings and detailed description herein; however, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the scope of the invention as defined by the appended claims; meanwhile, any changes, modifications, and evolutions of the equivalent changes of the above embodiments according to the actual techniques of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (10)
1. A real-time communication method based on the Internet of things is characterized by comprising the following steps:
step 1, the terminal of the Internet of things requests to connect a data center, and if the connection is successful, identity identification information is sent to the data center;
step 2, the data center verifies the identity identification information, and if the identity identification information passes the verification, the data center responds to the Internet of things terminal and establishes connection;
step 3, the terminal of the Internet of things and the data center perform data subscription interaction, process the full data to be sent through a data compression algorithm, and periodically transmit the compressed full data;
wherein, the first and the second end of the pipe are connected with each other,
and the Internet of things terminal is connected with the data center through a TCP/IP protocol.
2. The real-time communication method based on the internet of things as claimed in claim 1, wherein: in step 1, if the connection fails, the connection is retried after the interval T1.
3. The real-time communication method based on the internet of things as claimed in claim 1, wherein: in the step 2, if the verification fails, the connection is disconnected, and after an interval T2, the internet of things terminal retries to request to connect to the data center.
4. The real-time communication method based on the internet of things as claimed in claim 1, wherein: the method comprises the following steps:
after the internet of things terminal is connected with the data center, if no data exists in the link after the time T3 is exceeded, a heartbeat verification packet is sent to the data center at regular time; after sending the heartbeat verification packet to the data center, if no correct response message is received, the interval time T4 is sent again, and if no response message is received for N consecutive times, the connection is disconnected.
5. The real-time communication method based on the internet of things as claimed in claim 1, wherein:
in step 3, before receiving the data subscription instruction, the internet of things terminal sends an online notification at an interval of T5 to remind the data center of performing subscription processing.
6. The real-time communication method based on the internet of things as claimed in claim 1, wherein:
in step 3, after the transmission of the full data, if the transmission is not confirmed, retry is performed after an interval T6; if confirmed, the previously accumulated unsent packets are transmitted.
7. The real-time communication method based on the internet of things as claimed in claim 1, wherein: the data compression algorithm employs a zlib compression algorithm.
8. A computer-readable storage medium having stored thereon a computer program, characterized in that: the computer program is executed by a processor to perform the method of real-time communication based on the internet of things of any one of claims 1 to 7.
9. An electronic device, characterized by comprising: a processor, a memory, and a program, wherein the program is stored in the memory and configured to be executed by the processor, the program comprising instructions for performing the internet of things based real-time communication method of any of claims 1-7.
10. A real-time communication system based on the Internet of things is characterized in that: the real-time communication method based on the internet of things as claimed in any one of claims 1 to 7.
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| CN202111681918.3A CN114500669A (en) | 2021-12-31 | 2021-12-31 | Real-time communication method and system based on Internet of things, storage medium and electronic equipment |
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106156164A (en) * | 2015-04-15 | 2016-11-23 | 腾讯科技（深圳）有限公司 | resource information processing method and device |
| WO2017067327A1 (en) * | 2015-10-22 | 2017-04-27 | 上海斐讯数据通信技术有限公司 | Method for establishing persistent connection between multiple smart devices and server, and smart device |
| CN107561990A (en) * | 2017-09-30 | 2018-01-09 | 华南理工大学 | A kind of industrial sensor signal picker and acquisition method based on edge calculations |
| CN108337120A (en) * | 2018-02-01 | 2018-07-27 | 北京安控科技股份有限公司 | A kind of remote upgrade method of internet-of-things terminal equipment |
| CN108880996A (en) * | 2018-07-11 | 2018-11-23 | 成都凌炘科技有限公司 | A kind of method for pushing and system of the real-time phonetic based on technology of Internet of things |
| WO2019205557A1 (en) * | 2018-04-24 | 2019-10-31 | 海信集团有限公司 | Resource subscription for internet of things device |
| CN110442814A (en) * | 2019-06-19 | 2019-11-12 | 中国电力科学研究院有限公司 | A kind of data interaction system and method for ubiquitous electric power Intelligent terminal for Internet of things |
| CN110535965A (en) * | 2019-09-03 | 2019-12-03 | 北京元安物联技术有限公司 | A kind of data processing method and device, storage medium |
| CN110557448A (en) * | 2019-08-29 | 2019-12-10 | 宁波智轩物联网科技有限公司 | Control method and system for smart home |
| CN111277557A (en) * | 2019-12-04 | 2020-06-12 | 珠海派诺科技股份有限公司 | Real-time communication method, equipment and storage medium |
| CN212259004U (en) * | 2020-06-18 | 2020-12-29 | 北京腾华科技有限公司 | System for realizing remote monitoring of diesel vehicle through TCP long connection |
| CN113132477A (en) * | 2021-04-16 | 2021-07-16 | 易斌 | Real-time transmission interaction method and system for browser terminal and equipment |
-
2021
- 2021-12-31 CN CN202111681918.3A patent/CN114500669A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106156164A (en) * | 2015-04-15 | 2016-11-23 | 腾讯科技（深圳）有限公司 | resource information processing method and device |
| WO2017067327A1 (en) * | 2015-10-22 | 2017-04-27 | 上海斐讯数据通信技术有限公司 | Method for establishing persistent connection between multiple smart devices and server, and smart device |
| CN107561990A (en) * | 2017-09-30 | 2018-01-09 | 华南理工大学 | A kind of industrial sensor signal picker and acquisition method based on edge calculations |
| CN108337120A (en) * | 2018-02-01 | 2018-07-27 | 北京安控科技股份有限公司 | A kind of remote upgrade method of internet-of-things terminal equipment |
| WO2019205557A1 (en) * | 2018-04-24 | 2019-10-31 | 海信集团有限公司 | Resource subscription for internet of things device |
| CN108880996A (en) * | 2018-07-11 | 2018-11-23 | 成都凌炘科技有限公司 | A kind of method for pushing and system of the real-time phonetic based on technology of Internet of things |
| CN110442814A (en) * | 2019-06-19 | 2019-11-12 | 中国电力科学研究院有限公司 | A kind of data interaction system and method for ubiquitous electric power Intelligent terminal for Internet of things |
| CN110557448A (en) * | 2019-08-29 | 2019-12-10 | 宁波智轩物联网科技有限公司 | Control method and system for smart home |
| CN110535965A (en) * | 2019-09-03 | 2019-12-03 | 北京元安物联技术有限公司 | A kind of data processing method and device, storage medium |
| CN111277557A (en) * | 2019-12-04 | 2020-06-12 | 珠海派诺科技股份有限公司 | Real-time communication method, equipment and storage medium |
| CN212259004U (en) * | 2020-06-18 | 2020-12-29 | 北京腾华科技有限公司 | System for realizing remote monitoring of diesel vehicle through TCP long connection |
| CN113132477A (en) * | 2021-04-16 | 2021-07-16 | 易斌 | Real-time transmission interaction method and system for browser terminal and equipment |
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