CN217088156U

CN217088156U - Data communication system based on LoRaWAN

Info

Publication number: CN217088156U
Application number: CN202121189268.6U
Authority: CN
Inventors: 陈维明; 余云; 马赛; 杨凡; 黄安全; 顾雪; 朱雷霆
Original assignee: CRSC Communication and Information Group Shanghai Co Ltd
Current assignee: CRSC Communication and Information Group Shanghai Co Ltd
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2022-07-29
Anticipated expiration: 2031-05-31

Abstract

The utility model relates to a data communication system based on LoRa WAN, including loRa backend server, loRa gateway and loRa terminal, the loRa terminal is equipped with the first loRa module that is used for signaling interaction and static data transmission and the second loRa module that is used for dynamic data transmission, and first loRa module and second loRa module communicate with the loRa gateway respectively, and the loRa gateway links to each other with the loRa backend server. Compared with the prior art, the utility model has the advantages of realize that data fast transmission, transmission efficiency are high, scalability is strong, with low costs in the website.

Description

Data communication system based on LoRaWAN

Technical Field

The utility model belongs to the technical field of data communication technique and specifically relates to a data communication system based on LoRaWAN is related to in the railway station yard.

Background

LoRaWAN is a set of communication protocols and system architecture designed based on LoRa long-distance communication technology and networking. The structure of the system is shown in fig. 1, and the system comprises an LoRa terminal, an LoRa gateway and a server, has the characteristics of no need of applying for wireless frequency, more supported nodes, wide coverage range, strong anti-interference performance, low cost and the like, and is widely applied to the field of data transmission of the internet of things.

When the existing equipment is detected or monitored on line, the station yard of the railway needs to transmit static data (long acquisition time interval and small data volume) and dynamic data (short-time intensive acquisition, data file formation and large data volume). The characteristics of LoRaWAN are very suitable for the on-line detection of railway station yard equipment or the transmission of monitoring static data, but the transmission of dynamically generated data files is difficult (the data transmission rate is low, and the data is easy to lose). Although the problem of on-line detection or monitoring of data transmission by rail yard equipment (including static data and dynamic data) can be solved by other communication means, the complexity and cost of the solution are increased considerably.

Disclosure of Invention

The purpose of the utility model is to provide a data communication system based on LoRaWAN that realizes that data fast transmission, transmission efficiency are high, scalability is strong, with low costs in the website in order to overcome the defect that above-mentioned prior art exists.

The purpose of the utility model can be realized through the following technical scheme:

a data communication system based on LoRaWAN comprises a LoRa background server, a LoRa gateway and a LoRa terminal; the LoRa terminal is provided with a first LoRa module for signaling interaction and static data transmission and a second LoRa module for dynamic data transmission; the first LoRa module and the second LoRa module are respectively communicated with the LoRa gateway; the LoRa gateway is connected with the LoRa background server.

Preferably, the first LoRa module is provided with a 125kHz communication channel.

Preferably, the second LoRa module is provided with a 500kHz communication channel.

Preferably, the LoRa gateway is provided with a 125kHz communication channel and a 500kHz communication channel.

More preferably, the LoRa gateway is provided with a Semtech LoRa chip.

More preferably, the LoRa gateway is provided with two wireless transceivers.

Preferably, the LoRa terminal further includes a main control module; first loRa module and second loRa module link to each other with host system respectively.

Preferably, the number of the LoRa terminals is several, and the several LoRa terminals communicate with the LoRa gateway respectively.

More preferably, when the LoRa terminal accesses the network, only one LoRa module accesses the network, and the other LoRa module shares the module identifier and the access credential of the access module.

Preferably, the LoRa backend server, the LoRa gateway and the LoRa terminal are connected in a star manner respectively.

Compared with the prior art, the utility model discloses following beneficial effect has:

firstly, realizing rapid data transmission in a site: the utility model provides a data transmission system has increased a loRa communication module in LoRaWAN terminal equipment, namely the second loRa module, and this module adopts 500kHz uplink channel, can be used to the quick transmission of data; the first LoRa module carries out signaling interaction and static transmission, and the second LoRa module carries out quick data transmission, can not receive when having avoided current LoRaWAN terminal equipment to send through this kind of mode, can not send the drawback during the receipt, has realized the quick transmission of data in the website.

Secondly, the transmission efficiency is high: the utility model provides a data communication system adopts two loRa communication modules, all has a wireless transceiver in two modules, forms two full worker communication modes to second module only is used for going upward the transmission, and it is fast, efficient to go upward transmission rate.

Thirdly, the expandability is strong: the utility model provides a data communication system is though loRa terminal contains two loRa modules, but only has a loRa module to go into the net, and another sharing goes into the module sign of net loRa module and goes into the voucher, only shows as a logic entity at loRa backend service, and like this, loRa backend service does not receive loRaWAN terminal equipment to carry out the influence of module and channel expansion, has improved the scalability of system greatly.

Fourthly, the cost is low: the utility model provides a data communication system only needs the loRa terminal to increase the fast transmission that loRa module can realize dynamic data, when having kept the great deal of transmission advantage of loRaWAN, has improved data transmission's speed, can satisfy the needs of railway station yard higher speed data transmission under low-cost condition.

Drawings

Fig. 1 is a schematic structural diagram of a LoRaWAN network in the prior art;

fig. 2 is a schematic structural diagram of the LoRaWAN data communication system of the present invention;

fig. 3 is the main structure diagram of the LoRaWAN data communication system of the present invention.

The reference numbers in the figures indicate:

1. loRa backend server, 2, loRa gateway, 3, loRa terminal, 301, first loRa module, 302, second loRa module, 303, host system.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection scope of the present invention.

The utility model provides a data communication system based on LoRaWAN, its structure is shown in fig. 2 and fig. 3, including LoRa backend server 1, LoRa gateway 2 and LoRa terminal 3, and LoRa terminal 3 communicates with LoRa backend server 1 through LoRa gateway 2.

The LoRa terminal 3 includes a first LoRa module 301, a second LoRa module 302, and a main control module 303, where the first LoRa module 301 is provided with a 125kHz communication channel for signaling interaction and static data transmission. The second LoRa module 302 is provided with a 500kHz communication channel for dynamic data transmission.

The LoRa gateway 2 is provided with a 125kHz communication channel and a 500kHz communication channel for communicating with the LoRa terminal 3.

In this embodiment, the number of LoRa terminals 3 is a plurality of, and a plurality of LoRa terminals 3 communicate with LoRa gateway 2 respectively, and when LoRa terminals 3 were networking, there was and only one LoRa module to network, and another LoRa module shares the module identification and the credential of networking LoRa module. The LoRa backend server 1 is only shown as a logical entity, so that the LoRa backend server 1 is not affected by the loran terminal device performing LoRa terminal module and channel expansion.

The LoRa backend server, the LoRa gateway 2, and the LoRa terminal 3 in this embodiment are connected in a star manner, respectively.

The gateway in the embodiment adopts a LoRa gateway with a Semtech SX1301 chip and a LoRa terminal module with a Semtech SX1278 chip.

The communication principle of the data communication device is as follows:

a main control module in the LoRa terminal configures a first LoRa module and a second LoRa module;

a first LoRa module in the LoRa terminal enters a LoRaWAN network;

a first LoRa module in the LoRa terminal sends the received network access voucher information to a second LoRa module through a master control module;

the main control module in the LoRa terminal periodically collects sensor data, and transmits static low-rate data information to the LoRa gateway together with the first LoRa module;

judging whether a data file needs to be transmitted or not;

a main control module in the LoRa terminal applies for sending permission to a LoRa background server through a first LoRa module;

after the main control module obtains the sending permission, the data file is sent to the background server through the second LoRa module;

after the data is sent, the main control module releases sending permission to the background server through the first LoRa module.

And the LoRa background server judges whether data are lost in real time in the data file transmission process, if so, the LoRa background server issues information needing retransmission through a 125kHz channel, and the LoRa terminal retransmits the information through a second LoRa module at a 500kHz channel according to a retransmission signaling.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope of the present invention, and these modifications or replacements should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A data communication system based on LoRaWAN is characterized by comprising a LoRa background server (1), a LoRa gateway (2) and a LoRa terminal (3); the LoRa terminal (3) is provided with a first LoRa module (301) for signaling interaction and static data transmission and a second LoRa module (302) for dynamic data transmission; the first LoRa module (301) and the second LoRa module (302) are respectively communicated with the LoRa gateway (2); LoRa gateway (2) link to each other with LoRa backend server (1).

2. A loran-based data communication system according to claim 1, wherein the first LoRa module (301) is configured with a 125kHz communication channel.

3. A loran-based data communication system according to claim 1, wherein the second LoRa module (302) is configured with a 500kHz communication channel.

4. A LoRaWAN based data communication system according to claim 1, characterized in that the LoRa gateway (2) is provided with 125kHz communication channel and 500kHz communication channel.

5. A LoRaWAN-based data communication system according to claim 4, characterized in that the LoRa gateway (2) is provided with a Semtech LoRa chip.

6. A LoRaWAN-based data communication system according to claim 4, characterized in that the LoRa gateway (2) is provided with two wireless transceivers.

7. A loran-based data communication system according to claim 1, characterized in that the LoRa terminal (3) further includes a main control module (303); first loRa module (301) and second loRa module (302) link to each other with main control module (303) respectively.

8. A LoRaWAN-based data communication system according to claim 1, wherein the number of LoRa terminals (3) is several, and several LoRa terminals (3) communicate with LoRa gateway (2), respectively.

9. A LoRaWAN-based data communication system according to claim 7, characterized in that, when accessing network, one and only one LoRa module accesses network by the LoRa terminal (3), and the other LoRa module shares module identification and access certificate of the LoRa module.

10. A LoRaWAN-based data communication system according to claim 1, characterized in that the LoRa backend server (1), the LoRa gateway (2) and the LoRa terminal (3) are connected in a star manner respectively.