CN107071836B - Data downlink method compatible with CLASSA and CLASSB - Google Patents
Data downlink method compatible with CLASSA and CLASSB Download PDFInfo
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- CN107071836B CN107071836B CN201710124315.0A CN201710124315A CN107071836B CN 107071836 B CN107071836 B CN 107071836B CN 201710124315 A CN201710124315 A CN 201710124315A CN 107071836 B CN107071836 B CN 107071836B
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- terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/18—Negotiating wireless communication parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
Abstract
The invention discloses a data downlink method compatible with CLASS A and CLASS B, which judges whether a server is in a CLASS A or CLASS B working mode according to a terminal state stored by the server when the server receives downlink data of a terminal. If the class A is the class A, storing the downlink data into a queue, and issuing the downlink data to the base station for sending when the terminal next uplink data; and if the window is class B, calculating the next opened downlink window of the terminal according to the parameters of the class B, and immediately sending the data and the downlink window to the base station for sending. The technical scheme of the invention can ensure the randomness and the safety of the product. The invention only exposes one interface to the outside, namely realizes the downlink of class A and class B, simplifies the work of downlink data and improves the application access efficiency.
Description
Technical Field
The invention belongs to the technical field of Internet of things, and relates to a data downlink method compatible with CLASS A and CLASS B, in particular to a data downlink method compatible with CLASS A and CLASS B by LoRaWAN.
Background
LoRa is a low-power consumption internet of things technology provided by Semtech corporation, and is widely applied to the fields of wireless meter reading and the like. LoRaWAN adopts LoRa technique to construct low-power consumption wireless internet wide area network. The LoRaWAN terminal sends data to the base station through radio waves, and the base station sends the data to the LoRaWAN server through the Ethernet for processing. The working modes of the LoRaWAN terminal are classified into class A and class B, and the difference between the two modes is mainly that the windows of the terminal for receiving downlink data are different. A window of a terminal working in a ClassA mode for receiving downlink data is opened 1 second after each uplink, and a server transmits the downlink data and transmission time to a base station after each uplink data of the terminal; and the downlink window of the terminal working in the class B mode is periodically opened after being synchronized with the server, and the server needs to calculate the downlink window and select the downlink data to the base station.
It can be seen that the downlinks of class a and class B are completely different, and in the existing scheme, it is necessary to determine whether the terminal is in a class a or class B operating mode before interface call, and then walk different downlink interfaces according to different operating modes, which is not concise enough. A service-side processing scheme capable of performing both class a and class B downlink processing is needed, and only one interface is exposed to the outside, that is, downlink of two modes of class a and class B is realized.
Disclosure of Invention
The invention aims to provide a data downlink method compatible with CLASS A and CLASS B, which judges whether a server is in a CLASS A or CLASS B working mode according to a terminal state stored by the server when the server receives downlink data of a terminal. If the class A is the class A, storing the downlink data into a queue, and issuing the downlink data to the base station for sending when the terminal next uplink data; and if the window is class B, calculating the next opened downlink window of the terminal according to the parameters of the class B, and immediately sending the data and the downlink window to the base station for sending.
In order to achieve the technical purpose and achieve the technical effect, the technical scheme specifically comprises the following steps:
a data downlink method compatible with CLASS A and CLASS B is characterized in that when a LoRaWAN server receives downlink data for a terminal, the following processing is carried out, and the method specifically comprises the following steps:
step 1, judging whether the terminal is in a class A or class B working state according to the synchronous state of the terminal and the server; at the server, each terminal has a parameter A; when the terminal works in class A, the value of A is 0; when the terminal is switched to the classB mode to work, the terminal is firstly synchronized with the server, and the server updates the value of the parameter A to 1;
step 2, if the terminal is in class A mode, storing the data into a queue, and sending the data to the base station for sending when the terminal uplink data is sent next time; the transmitted content comprises downlink data and base station transmission time, wherein the base station transmission time t is obtained by adding and calculating terminal uplink time t1 and downlink window opening time t2, and the base station transmits a downlink window right at the terminal at the time point t after receiving the downlink window, so that data downlink is realized;
step 3, if the terminal is in the class B mode, calculating the next receiving window of the terminal according to the synchronous parameters of the terminal and the server and converting the next receiving window into the sending time t of the base station; and immediately sending the downlink data and the sending time t of the base station to the base station, and sending the data at the time point t after the base station receives the downlink data and the sending time t of the base station.
Further, for a terminal in the CLASS B state, the currently available window W is recorded, and when data is issued and the data is successfully issued, W slides a window forward, thereby ensuring that the downlink windows do not conflict each time.
The invention has the following beneficial effects:
the invention only exposes one interface to the outside, thus realizing the downlink of class A and class B modes, and simplifying the work of downlink data; when the application is accessed, data downlink can be realized only by calling one interface without knowing details such as the working state of the terminal, so that the application access flow is simplified, and the application access efficiency is improved.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments.
A data downlink method compatible with CLASS A and CLASS B is characterized in that when a LoRaWAN server receives downlink data for a terminal, the following processing is carried out:
and 1, judging whether the terminal is in a class A or class B working state according to the synchronous state of the terminal and the server. At the server, each terminal has a parameter a. When the terminal works in class A, the value of A is 0; when the terminal switches to class B mode operation, the terminal will synchronize with the server first, and the server will update the value of parameter A to 1.
Thus, we can determine whether the terminal to downlink data is in class a or class B operation mode.
2 if the terminal is in class A mode, storing the data into a queue, and sending the data to the base station for sending when the terminal uplink data is transmitted next time. The transmitted content comprises downlink data and base station transmitting time, wherein the base station transmitting time t is obtained by adding and calculating terminal uplink time t1 and downlink window opening time t2, and the base station transmits a downlink window right at the terminal at the time point t after receiving the downlink window, so that data downlink is realized.
3, if the terminal is in the class B mode, calculating the next receiving window of the terminal according to the synchronous parameters of the terminal and the server and converting the next receiving window into the sending time t of the base station; and immediately sending the downlink data and the sending time t of the base station to the base station, and sending the data at the time point t after the base station receives the downlink data and the sending time t of the base station.
The following is two downlink data for a terminal operating in CLASS B mode:
JSON down:
{"txpk":{"imme":false,"tmst":3375483540,"freq":476.7,"rfch":0,"powe":20,"modu":"LORA","datr":"SF7BW125","codr":"4/5","ipol":true,"prea":1000,"size":21,"data":"YHlbBAAAJAACO8e6uYZyZTRgdTMV","serve rtime":1487681997386}}
JSON down:
{"txpk":{"imme":false,"tmst":3621243540,"freq":476.7,"rfch":0,"powe":20,"modu":"LORA","datr":"SF7BW125","codr":"4/5","ipol":true,"prea":1000,"size":21,"data":"YHlbBAAAJAACO8e6uYZyZTRgdTMV","servertime":1487682243146}}
the interval between the two data is 5 windows, and the window using the method moves smoothly, thereby realizing data issuing.
The above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, and any simple modifications or equivalent substitutions of the technical solutions that can be obviously obtained by those skilled in the art within the technical scope of the present invention are within the scope of the present invention.
Claims (2)
1. A data downlink method compatible with CLASS A and CLASS B is characterized in that when a LoRaWAN server receives downlink data for a terminal, the following processing is carried out, and the method specifically comprises the following steps:
step 1, judging whether the terminal is in a class A or class B working state according to the synchronous state of the terminal and the server; at the server, each terminal has a parameter A; when the terminal works in class A, the value of A is 0; when the terminal is switched to the class B mode to work, the terminal is firstly synchronized with the server, and the server updates the value of the parameter A to 1;
step 2, if the terminal is in class A mode, storing the downlink data into a queue, and sending the downlink data to the base station for sending when the terminal uplink data is sent next time; the transmitted content comprises downlink data and base station transmitting time, wherein the time t of the base station transmitting time is obtained by adding and calculating the time t of the uplink time t1 of the terminal and the time t2 of the downlink window opening time, and the base station transmits the downlink window right at the terminal at the time t after receiving the downlink window, so that data downlink is realized;
step 3, if the terminal is in the class B mode, calculating the next receiving window of the terminal according to the synchronous parameters of the terminal and the server and converting the next receiving window into the sending time t of the base station; and immediately sending the downlink data and the sending time t of the base station to the base station, and sending the data at the time point t after the base station receives the downlink data and the sending time t of the base station.
2. The method as claimed in claim 1, wherein the terminal in CLASS B state records the currently available window W, and when data is delivered and delivered successfully, W slides forward by one window, thus ensuring that each time downlink window does not conflict.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710124315.0A CN107071836B (en) | 2017-03-03 | 2017-03-03 | Data downlink method compatible with CLASSA and CLASSB |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710124315.0A CN107071836B (en) | 2017-03-03 | 2017-03-03 | Data downlink method compatible with CLASSA and CLASSB |
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| Publication Number | Publication Date |
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| CN107071836A CN107071836A (en) | 2017-08-18 |
| CN107071836B true CN107071836B (en) | 2020-04-03 |
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| CN201710124315.0A Active CN107071836B (en) | 2017-03-03 | 2017-03-03 | Data downlink method compatible with CLASSA and CLASSB |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107548103B (en) * | 2017-09-28 | 2021-07-23 | 新华三技术有限公司 | Data forwarding method and device |
| CN107659889B (en) * | 2017-09-28 | 2021-06-29 | 新华三技术有限公司 | Data forwarding method and device |
| CN111565378A (en) * | 2019-02-14 | 2020-08-21 | 深圳长城开发科技股份有限公司 | LoRa communication method and LoRa communication system |
| CN111666120A (en) * | 2019-03-07 | 2020-09-15 | 阿里巴巴集团控股有限公司 | Terminal control method and device |
| CN110446227B (en) * | 2019-10-08 | 2020-01-07 | 武汉慧联无限科技有限公司 | Method, device, equipment and medium for controlling opening time of downlink window of terminal |
| CN110691375B (en) * | 2019-12-10 | 2020-04-17 | 武汉慧联无限科技有限公司 | Selection method, selection device and computer storage medium |
| CN112867060B (en) * | 2021-01-18 | 2022-04-05 | 重庆邮电大学 | Downlink message queue processing method of LoRa network server |
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| CN106230899A (en) * | 2016-07-21 | 2016-12-14 | 桂林电子科技大学 | A kind of intelligent bus information query system |
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| EP3002884B1 (en) * | 2014-09-30 | 2018-04-18 | Semtech Corporation | Wireless communication method |
| US9730245B2 (en) * | 2014-10-09 | 2017-08-08 | Qualcomm Incorporated | Random access procedure in a cellular internet of things system |
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| CN106230899A (en) * | 2016-07-21 | 2016-12-14 | 桂林电子科技大学 | A kind of intelligent bus information query system |
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| Title |
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| 基于LoRa标准的MAC层协议研究;孙曼，张乃谦，金立标，余少波;《电视技术》;20161017;第40卷(第10期);37-42 * |
| 智慧能源物联网应用研究与分析;陈永波，刘建业，陈继军;《中兴通讯技术》;20170106;第23卷(第1期);77-81 * |
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Address after: Room 1604-05, 16th Floor, North Building, No. 333, Chengdu North Road, Jing'an District, Shanghai, 200041 Patentee after: National animal Network Co.,Ltd. Address before: Room 1604-05, 16th Floor, North Building, No. 333, Chengdu North Road, Jing'an District, Shanghai, 200041 Patentee before: GUODONG IOT TECHNOLOGY (SHANGHAI) CO.,LTD. |
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