CN114760293A - Internet of things system and standby channel using method thereof - Google Patents
Internet of things system and standby channel using method thereof Download PDFInfo
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Abstract
The invention provides an Internet of things system and a standby channel using method thereof. The first network hub device is connected to at least one first Internet of things device, and the second network hub device is connected to at least one second Internet of things device. The access node is connected with the first network hub device and the second network hub device. The service server of the internet of things is connected with the first network hub device and the second network hub device through the access node. In response to an abnormal connection between the first network hub and the access node, the first network hub establishes a connection with the second network hub via the standby frequency channel, and the first internet-of-things device reports the internet-of-things data to the internet-of-things service server via the standby frequency channel.
Description
Technical Field
The invention relates to the technology of the Internet of Things (IoT), in particular to an Internet of Things system and a standby channel using method thereof.
Background
In recent years, with the development and innovation of science and technology, the articles capable of connecting with the network are not limited to be computer devices or personal mobile communication devices, and more internet of things devices can report sensing data or interact with application service platforms through various communication technologies. Artificial intelligence, big data collection and analysis, block refining or the like can be realized by the support of the technology of the Internet of things. For example, the internet of things application service can be seen everywhere from environmental monitoring, intelligent factories, intelligent transportation, intelligent homes, intelligent agriculture, health care, intelligent life and the like. On the other hand, with the progress and development of cloud computing technology, artificial intelligence and big data application, the scale and application range of the internet of things are growing rapidly, and 500 hundred million internet of things devices can be expected to be reached in 2020.
With the increasing number of devices in the internet of things, huge burden is imposed on a base station and a backhaul Network (backhaul Network) in the existing telecommunication Network architecture. In other words, when the number of network devices around the base station is greatly increased, the base station and the backhaul network in the existing telecommunication network structure are loaded due to the bandwidth limitation of the backhaul network and the processing capability of the base station.
In other words, as the number of devices in the internet of things increases dramatically, a reliable and stable communication network architecture is required to be used as a support so that various application services using the technology of the internet of things can obtain correct data from the devices in the internet of things. Otherwise, even an excellent application service of the internet of things cannot realize its powerful and convenient application function without correct data. That is, a reliable network transmission environment is a necessary condition for the internet of things application service. In order to ensure that the internet of things device can correctly report data, many network problems, such as coverage of wireless signals, limitation of communication bandwidth, communication quality, data collision, and resource safety problems, need to be considered.
Therefore, as the number of devices in the internet of things is increasing, there are actually many challenges in providing a reliable network transmission environment for services in the internet of things. Therefore, how to provide a reliable network transmission environment for the service of the internet of things has become a very important and widely discussed issue.
Disclosure of Invention
In view of this, the invention provides an internet of things system and a standby channel using method, which can make data transmission of the internet of things more reliable.
The embodiment of the invention provides an Internet of things system, which comprises a first network hub device, a second network hub device, at least one access node and an Internet of things service server. The first network hub device is connected to at least one first internet of things device, and the second network hub device is connected to at least one second internet of things device. The access node is connected with the first network hub device and the second network hub device. The service server of the internet of things is connected with the first network hub device and the second network hub device through the access node. In response to an abnormal connection between the first network hub and the access node, the first network hub establishes a connection with the second network hub via the backup frequency channel, and the first internet of things device reports internet of things data to the internet of things service server via the backup frequency channel between the first network hub and the second network hub.
From another perspective, embodiments of the present invention provide a method for using a backup channel, which is suitable for an internet of things system. The method comprises the following steps. The method comprises the steps of establishing connection between at least one first Internet of things device and a first network hub device, and establishing connection between the first network hub device and at least one access node. The connection between at least one second networking device and a second network hub device is established, and the connection between the second network hub device and at least one access node is established. In response to an abnormal connection between the first network hub and the at least one access node, a connection is established with the second network hub through a backup frequency channel by the first network hub. And returning the data of the internet of things of the first internet of things device to the internet of things service server through a standby frequency channel between the first network hub device and the second network hub device.
Based on the above, in the embodiments of the present invention, the network hub devices are disposed between the internet of things device and the base station, so that the loads of the base station and the backhaul can be greatly reduced. When the connection between a certain network hub device and a base station is abnormal, the network hub device can be connected to another network hub device through the standby frequency channel, so that the internet of things data of a plurality of internet of things devices managed by the network hub device can be reported to the internet of things service server as soon as possible through the standby frequency channel and the other network hub device. Therefore, the success rate and the reliability of returning the data of the Internet of things can be greatly improved.
In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.
Drawings
FIG. 1 is a schematic diagram of an Internet of things system in accordance with an embodiment of the invention;
FIGS. 2A and 2B are schematic diagrams illustrating an application of an IOT system according to an embodiment of the present invention;
FIG. 3 is a block diagram of a network hub device according to an embodiment of the invention;
fig. 4 is a flowchart of a communication method of an internet of things system according to an embodiment of the present invention;
fig. 5A and 5B are schematic diagrams illustrating adjusting a data reporting period of an internet of things device according to an embodiment of the invention;
FIG. 6 is a diagram illustrating a method for using a backup tunnel according to an embodiment of the present invention;
fig. 7 is a diagram illustrating a method for using a backup tunnel according to an embodiment of the invention.
Description of the reference numerals
10: Internet of things system
111_ 1-111 _ N, 112_ 1-112 _ M, 113_ 1-113 _3 devices of the Internet of things
120. 120(1), 120(2), 120(3) access node
131. 132, 133 network concentrator
31 communication circuit
32 storage device
33, processor
140 service server of internet of things
101 core network
102 ISP network
150 return line
d1 data of Internet of things
d2 parameter configuration instruction
BF1, BF2 spare frequency channel
P1-P3 data transmission path
S401 to S404
Detailed Description
Some embodiments of the invention will now be described in detail with reference to the drawings, wherein like reference numerals are used to refer to like or similar elements throughout the several views. These examples are only a part of the present invention and do not disclose all possible embodiments of the present invention. Rather, these embodiments are merely exemplary of the methods and systems claimed herein.
FIG. 1 is a schematic diagram of an Internet of things system in accordance with an embodiment of the invention. Referring to fig. 1, the internet of things system 10 includes a plurality of network hubs 131 and 132, an access node 120, and an internet of things service server 140.
The network hub devices 131, 132 are each connected to a cluster of internet of things devices. The network hub device 131 (i.e., the first network hub device) is connected to N IOT devices 111_ 1-111 _ N (i.e., the first IOT device), where N is an integer greater than or equal to 1. The network hub 132 (i.e., the second network hub) is connected to M IOT devices 112_ 1-112 _ M (i.e., the second IOT device), where M is an integer greater than or equal to 1.
The network hub devices 131 and 132 are connected between the access node 120 and the IOT devices 111_1 to 111_ N and 112_1 to 112_ M. Specifically, the internet of things devices 111_1 to 111_ N and 112_1 to 112_ M may establish communication connection with the network hub devices 131 and 132 through wired or wireless communication standards. For example, the internet of things devices 111_1 to 111_ N and 112_1 to 112_ M may establish communication connection with the network hub devices 131 and 132 via a WiFi standard, a Bluetooth (Bluetooth) standard, a ZigBee wireless communication standard, a Long Range (LoRa) standard, an ethernet standard, an RS485 standard, or other communication standards, which is not limited in the present invention.
The IOT devices 111_ 1-111 _ N and 112_ 1-112 _ M have networking function, and can communicate with other electronic devices through wired or wireless communication technology. In one embodiment, the IOT devices 111_ 1-111 _ N and 112_ 1-112 _ M report the sensing data, the measurement data or other types of data to the IOT service server 140. In various applications of the internet of things, the internet of things devices 111_1 to 111_ N and 112_1 to 112_ M can be implemented by using general electronic devices, such as the internet of things devices 111_1 to 111_ N and 112_1 to 112_ M can be household appliances, air conditioners, lighting devices, and the like. Alternatively, the internet of things devices 111_1 to 111_ N and 112_1 to 112_ M may also be environment monitoring equipment having one or more sensors of temperature, humidity, air pressure, gas, ultraviolet light, and the like. Or, the internet of things devices 111_1 to 111_ N and 112_1 to 112_ M may also be various measuring instruments, such as a water meter, a gas meter, an electric meter, and the like. However, the internet of things devices 111_1 to 111_ N and 112_1 to 112_ M in the present embodiment are not limited to the above examples.
The access node 120 is connected to the core network 101 and is configured to provide wireless or wired communication services to the internet of things devices 111_1 to 111_ N and 112_1 to 112_ M. In this disclosure, the term "access node" may represent various embodiments. For example, the access Node 120 may be a base station deployed by a telecommunication network operator, such as a WiMAX base station, a GSM radio Base Transceiver Station (BTS), a Universal Mobile Telecommunications System (UMTS) base station (Node B), an LTE evolved Node B (eNB), a 5G base station (gNB), or a base station supporting other wireless communication standards. From another perspective, the access node 120 may be a Macro (Macro cell) base station, a Micro (Micro cell) base station, a Pico cell (Pico cell) base station, or a femto cell (femto cell) base station, which is not limited in the present invention. Furthermore, the access node 120 may also be a DSL modem (DSL modem) deployed by an internet provider, a cable modem (cable modem), a gateway, or the like, which is not limited in this respect.
In addition, the network hubs 131, 132 may be connected to the access node 120 via wired or wireless communication standards. For example, the network hub devices 131 and 132 may be connected to the access node 120 via a WiFi standard, a Long Range low power wireless communication (LoRa) standard, an ethernet standard, a Narrow Band Internet of things (NB-IoT) standard, an LTE standard, a 5G standard, or other communication standards, which are not limited in the present disclosure. In an embodiment, the network hub devices 131 and 132 may further serve as signal relay stations with wired or wireless connections to extend the communication service range, so that the deployment locations of the internet of things devices 111_1 to 111_ N and 112_1 to 112_ M are not limited by the geographic location of the access node 120. In addition, fig. 1 illustrates an example in which the network hub devices 131 and 132 may be connected to the same access node 120, but the invention is not limited thereto. In other embodiments, the hub devices 131, 132 may be connected to different access nodes.
It should be noted that, in the application of the internet of things service, the internet of things devices 111_1 to 111_ N and 112_1 to 112_ M need to report internet of things data to the internet of things service server 140 or receive a control command from the internet of things service server 140. In one embodiment, the IOT devices 111_ 1-111 _ N and 112_ 1-112 _ M may be connected to the access node 120 via the hub devices 131 and 132, respectively, for reporting IOT data to the IOT service server 140 via the core network 101 or receiving control commands from the IOT service server 140. That is, in one embodiment, the network hubs 131 and 132 may be regarded as Iot hubs (Iot hubs) configured for the IOT devices 111_ 1-111 _ N and 112_ 1-112 _ M. Through the bridging of the hub device 131, a plurality of internet of things devices 111_1 to 111_ N can simultaneously enjoy the communication services provided by the telecom network operator or the internet provider.
In one embodiment, the network hub devices 131 and 132 may be used to manage the IOT devices 111_ 1-111 _ N and 112_ 1-112 _ M. In other words, the network hub devices 131 and 132 may arrange different frequency channels and/or different data reporting periods for the internet of things devices 111_1 to 111_ N and 112_1 to 112_ M, respectively, so as to avoid collision of the internet of things devices 111_1 to 111_ N and 112_1 to 112_ M during reporting, thereby reducing the probability of data loss. The network hub devices 131 and 132 schedule communication resources of the internet of things devices 111_1 to 111_ N and 112_1 to 112_ M, so as to effectively reduce the burden of the access node 120 and a Backhaul (Backhaul) line, alleviate congestion caused by networking of a large number of internet of things devices 111_1 to 111_ N and 112_1 to 112_ M, and reduce the probability of data collision, thereby constructing a reliable network environment for the internet of things system 10.
It is noted that in one embodiment, in response to an abnormal connection between the hub 131 and the access node 120, the first hub 131 may establish a connection with the hub 132 through a back-up frequency BF 1. Thus, when the IOT devices 111_ 1-111 _ N are unable to report the IOT data through the connection between the hub 131 and the access node 120, the IOT devices 111_ 1-111 _ N can report the IOT data to the IOT service server 140 via the BF1 between the hub 131 and the hub 132. For example, the standby frequency channel BF1 between the network hub 131 and the network hub 132 may be a frequency channel in the Lora protocol.
Fig. 2A and 2B are schematic diagrams illustrating an application of an internet of things system according to an embodiment of the invention. Referring to fig. 2A, fig. 2A shows an implementation of the access node 120 including a radio base station 120(1) and an internet modem 120 (2). The IOT devices 111_ 1-111 _ N are connected to the hub 131, and the hub 131 is connected to the base station 120 (1). Specifically, the network hub 131 is located in the coverage of the radio base station 120(1) to establish a wireless connection with the radio base station 120 (1). The radio base stations 120(1) are connected to the core network 101 via a Backhaul (Backhaul) 150 of a telecommunications network operator. As such, the radio base station 120(1) may be connected to a Serving Gateway (SGW) or a Mobility Management Entity (MME) in the core network 101 via the backhaul 150. Accordingly, the internet of things devices 111_1 to 111_ N can communicate with the internet of things service server 140 through the network hub 131, the radio base stations 120(1), the backhaul 150 and the core network 101. In addition, it should be noted that fig. 2A only illustrates an example in which one network hub 131 is connected to the radio base station 120(1) for clarity, but the invention is not limited thereto. In one embodiment, the radio base station 120(1) may be connected to a plurality of network hubs, each of which is connected to a corresponding group of internet of things devices.
On the other hand, the IOT devices 112_ 1-112 _ M may be connected to the hub 132, and the hub 132 may be connected to the modem 120 (2). Specifically, the network hub 132 may be connected to the modem 120(2) via a transmission cable to establish a wired communication link. The modem 120(2) can be connected to a network device, such as a Digital Subscriber Line Access Multiplexer (DSLAM) or an Optical Line Terminator (OLT), which is an Access port of the ISP network 102. Network devices that serve as access ports to the ISP network 102 may be connected to network routing nodes in the ISP network 102 via backhaul lines, such that the modem 120(2) is connected to the core network 101 via the ISP network 102. Accordingly, the internet of things devices 112_1 to 112_ M can communicate with the internet of things service server 140 through the network hub 132, the modem 120(2), and the core network 101. In addition, it should be noted that, for the sake of clarity, fig. 2A only illustrates an example where one network hub 132 is connected to the modem 120(2), but the invention is not limited thereto. In one embodiment, the modem 120(2) may be connected to a plurality of network hub devices, and each of the network hub devices is connected to a corresponding group of internet of things devices.
Referring to fig. 2B, fig. 2B shows an implementation of the access node 120 including a radio base station 120(1) and a radio base station 120 (3). In contrast to fig. 2A, the network hub 132 may be connected to the radio base station 120 (3). Specifically, the network hub 132 is located in the coverage area of the radio base station 120(3) to establish a wireless connection with the radio base station 120 (3). Accordingly, the internet of things devices 112_1 to 112_ M can communicate with the internet of things service server 140 through the network hub 132, the radio base stations 120 and 3, the backhaul 150 and the core network 101.
It should be noted that the functions and hardware configurations of the network hub devices 131 and 132 are substantially the same, so the network hub device 131 is taken as an example for the following description, and those skilled in the art should be able to derive the functions and hardware configurations of the network hub device 132 based on the related teachings. Fig. 3 is a block diagram of a network hub according to an embodiment of the invention. Referring to fig. 3, the network hub 131 includes a communication circuit 31, a storage device 32, and a processor 33.
The network hub 131 may support one or more wired/wireless communication standards, and the communication circuit 31 may include components supporting one or more wired/wireless communication standards. For example, the communication circuit 31 may be an electronic component supporting RS485 standard, Long Term Evolution (LTE) standard, 5G standard, Wi-Fi standard, Lora standard or bluetooth standard, which is not limited in the present invention. That is, the communication circuit 31 may include a wireless transceiver, an antenna, or a wired signal transmission port, etc. The communication circuit 31 may establish a communication link with the internet of things devices 111_1 to 111_ N and the access node 120 according to one or more wired/wireless communication standards.
The storage device 32 is used for storing data, device configurations, program codes, software elements, and the like, which may be any type of fixed or removable Random Access Memory (RAM), read-only memory (ROM), flash memory (flash memory) or the like, integrated circuits, and combinations thereof.
The Processor 33 is coupled to the communication Circuit 31 and the storage device 32, and may be a programmable general purpose or special purpose Microprocessor (Microprocessor), a Digital Signal Processor (DSP), a programmable controller, an Application Specific Integrated Circuit (ASIC), or other similar components or combinations thereof. The processor 33 can execute the program codes stored in the storage device 32 and access the data recorded in the storage device 32 to realize any functions that the network hub 131 can execute in the present disclosure.
Referring to fig. 3, in an embodiment, taking the internet of things device 111_1 as an example, the internet of things device 111_1 can report the internet of things data d1 back to the internet of things service server 140 through the network hub 131, and the internet of things data d1 can include sensing data, measurement data, or other data. For example, the internet of things data d1 may include electricity meter degree, water meter degree, brightness sensing value, water condition sensing data, and the like. It should be noted that, in an embodiment, the network hub device 131 may dynamically schedule communication resources configured for the internet of things devices 111_1 to 111_ N, and the internet of things devices 111_1 to 111_ N may report the internet of things data d1 according to the communication policy rule determined by the network hub device 131, so as to avoid network congestion and data collision. In an embodiment, the network hub device 131 may send the parameter configuration command d2 to the internet of things device 111_1 to dynamically adjust the communication parameters of the internet of things device 111_1, so that the internet of things device 111_1 reports the internet of things data d1 according to the communication policy rule determined by the network hub device 131. The communication parameters may include Quality of Service (QoS) parameters, frequency channels, data reporting periods, or a combination thereof. The interaction between the network hub 131 and the remaining network devices 111_2 to 111_ N is similar to the aforementioned description, and is not repeated herein. Similarly, the interaction between the network hub 132 and the internet of things devices 112_2 to 112_ M is similar to the aforementioned description, and is not repeated herein.
Fig. 4 is a flowchart of a communication method of an internet of things system according to an embodiment of the present invention. Referring to fig. 4, the method of the present embodiment is applied to the internet of things system 10 in the above embodiment, and the detailed steps of the present embodiment are described below with reference to various elements in the internet of things system 10.
In step S401, the links between the internet of things devices 111_1 to 111_ N and the network hub device 131 are established, and the links between the network hub device 131 and the access node 120 are established. The connection establishment methods among the internet of things devices 111_1 to 111_ N, the network hub 131 and the access node 120 are described in the foregoing embodiments, and are not described herein again.
In step S402, the connections between the internet of things devices 112_1 to 112_ M and the network hub 132 are established, and the connections between the network hub 132 and the access nodes 120 are established. The connection establishment methods among the internet of things devices 112_1 to 112_ M, the network hub 132 and the access node 120 are described in the foregoing embodiments, and are not described herein again.
In step S403, in response to the link between the network hub 131 and the access node 120 being abnormal, the network hub 131 establishes a link with the network hub 132 through a standby frequency channel BF 1. Failure of the access node 120, failure of the network hub 131, obstruction shielding or poor weather conditions, etc., may cause the link between the network hub 131 and the access node 120 to be broken or abnormal. The network hub 131 can detect whether the connection with the access node 120 is normal.
In one embodiment, the network hub 131, 132 may set one or more backup frequency channels among the available channels. For example, in the Lora standard, the bandwidth of one available channel is, for example, 125kHZ or 250 kHZ. The network hub devices 131 and 132 will not configure the standby frequency channel to the internet of things devices 111_1 to 111_ N and 112_1 to 112_ M for reporting the internet of things data. The backup frequency channel may be used to transmit and receive signals and information from other network hub devices. When the connection between the network hub 131 and the access node 120 is abnormal, the network hub 131 cannot report the internet of things data back to the internet of things service server 140 through the access node 120. Therefore, when the network hub 131 detects an abnormal connection with the access node 120, the network hub 131 can send a connection request to the network hub 132 through the BF 1. The network hub 132 may hear whether the standby frequency channel BF1 has a connection request from other network hubs. In response to receiving a connection request through the standby frequency channel BF1, the hub 132 may establish a connection with the hub 131 through the standby frequency channel BF 1.
Next, in step S404, the internet of things devices 111_1 to 111_ N report the internet of things data of the internet of things devices 111_1 to 111_ N to the internet of things service server 140 through the standby frequency channel BF1 between the network hub 131 and the network hub 132. In detail, the internet of things devices 111_1 to 111_ N may transmit the internet of things data to the network hub device 131, and the network hub device 131 forwards the internet of things data of the internet of things devices 111_1 to 111_ N to the network hub device 132 through the standby frequency channel BF 1. Then, the network hub 132 transmits the internet of things data of the internet of things devices 111_1 to 111_ N to the internet of things service server 140 via the access node 120, so that the internet of things service server 140 can obtain the internet of things data of the internet of things devices 111_1 to 111_ N. Therefore, when the connection between the network hub 131 and the access node 120 is interrupted or abnormal, the internet of things data of the internet of things devices 111_1 to 111_ N can be reported to the internet of things service server 140 through the standby frequency channel BF1, thereby greatly improving the reliability and success rate of reporting the internet of things data.
It should be noted that, when the connection between the network hub 131 and the access node 120 is abnormal, the internet of things service server 140 cannot send control information to the internet of things devices 111_1 to 111_ N through the connection between the network hub 131 and the access node 120. In one embodiment, after the network hub 131 establishes a connection with the network hub 132 through the backup frequency channel BF1, the IOT service server 140 may send control information to the IOT devices 111_ 1-111 _ N through the backup frequency channel BF1 between the network hub 131 and the network hub 132. In other words, since the network hub 131 is connected to the network hub 132 through the standby frequency channel BF1, the service server 140 can transmit the control information to the network hub 132, and the network hub 132 transmits the control information to the internet of things devices 111_1 to 111_ N through the standby frequency channel BF 1.
In one embodiment, in response to the network hub 131 establishing a connection with the network hub 132 through the BF1, the network hub 132 sends a notification message to the service server 140 through the access node 120 to notify the service server 140 of adjusting the communication mode of the internet of things devices 111_1 to 111_ N. In one embodiment, the service server 140 may adjust the packet destination of the control information sent to the internet of things devices 111_1 to 111_ N from the network address of the hub 131 to the network address of the hub 132 to avoid the control information from being unable to be transmitted to the internet of things devices 111_1 to 111_ N.
In one embodiment, the control information sent by the internet of things service server 140 is, for example, parameter update information. When the IOT devices 111_ 1-111 _ N have a software/firmware update or other parameter update request, the IOT service server 140 can send a parameter update message to the network hub 132. The network hub 132 may forward the parameter update information to the network hub 131 through the standby frequency channel BF1, and the network hub 131 assigns the parameter update information to the internet of things devices 111_1 to 111_ N to drive the internet of things devices 111_1 to 111_ N to perform the setting update operation according to the parameter update information. That is, the internet of things service server 140 does not need to send N parameter update messages to drive the internet of things devices 111_1 to 111_ N one by one for performing the setting update operation, but sends one parameter update message to the network hub 132 to drive all the internet of things devices 111_1 to 111_ N for performing the setting update operation. Thus, the burden of the access node 120 and the Backhaul (Backhaul) can be greatly reduced.
In one embodiment, the network hub 132 may select the network hub 132 from a plurality of neighboring network hubs according to the location information or the load status of the neighboring network hubs. Specifically, in addition to the network hub devices 131, 132, the internet of things system 10 may also include other network hub devices. Depending on the wireless signal coverage of the hub device 131, in addition to the hub device 132, the hub device 131 is also capable of establishing a connection with other hub devices via the backup frequency channel. However, considering the connection quality and balancing the load of each network hub, the network hub 132 may select the network hub 132 from a plurality of neighboring network hubs according to the location information or load status of these neighboring network hubs. As such, the network hub 132 may select the closest network hub 132 from the neighboring network hubs to establish the backup tunnel connection. Alternatively, the hub 132 may select the hub 132 with the smallest load from the neighboring hubs to establish the backup tunnel connection. The load may include a packet transmission load or a connection number of the internet of things device.
In one embodiment, in response to the network hub 131 establishing a connection with the network hub 132 through the standby frequency channel BF1, the network hub 132 may adjust the data reporting periods and/or frequency channels allocated to the internet of things devices 111_1 to 111_ N and/or the internet of things devices 112_1 to 112_ M. The data reporting period is, for example, a time slot (timeslot) unit, and different data reporting periods correspond to different timeslots. Therefore, data loss caused by simultaneous mass transmission of the data of the internet of things devices 111_1 to 111_ N and the data of the internet of things devices 112_1 to 112_ M to the network hub device 132 can be avoided.
For example, fig. 5A and 5B are schematic diagrams illustrating adjusting a data reporting period of an internet of things device according to an embodiment of the invention. It should be noted that the following description is given by taking the example where the internet of things device 131 is used for managing and connecting to the internet of things devices 111_1 to 111_3 and the internet of things device 132 is used for managing and connecting to the internet of things devices 112_1 to 112_ 3.
Referring to fig. 5A, taking the internet of things device 111_1 and the internet of things device 112_1 as an example, after the network hub 131 is connected to the network hub 132 through the standby frequency channel BF1, the network hub 132 assigns a first frequency channel F1 and a first data reporting period T1 to the internet of things device 111_1 and assigns a second frequency channel F2 and a second data reporting period T4 to the internet of things device 112_1, so as to control the internet of things device 111_1 to report internet of things data using the first frequency channel F1 in the first data reporting period T1 and control the internet of things device 112_1 to report internet of things data using the second frequency channel F2 in the second data reporting period T4. In an embodiment, the first data reporting period T1 of the internet of things device 111_1 is different from the second data reporting period T4 of the internet of things device 112_ 1. Similarly, the network hub 132 assigns a first frequency channel F1 and first data reporting periods T2 and T3 to the internet of things devices 111_2 to 111_3, and assigns a second frequency channel F2 and second data reporting periods T5 and T6 to the internet of things devices 112_2 to 112_3, respectively. The first data reporting periods T1, T2, and T3 of the IOT devices 111_ 1-111 _3 are different from the second data reporting periods T4, T5, and T6 of the IOT devices 112_ 1-112 _ 3. As shown in fig. 5A, the time for the internet of things devices 111_1 to 111_3 to report the internet of things data is staggered from the time for the internet of things devices 112_1 to 112_3 to report the internet of things data, so that the problem of network congestion or data loss can be avoided.
In one embodiment, in response to the network hub 131 establishing a connection with the network hub 132 through the backup frequency channel BF1, the internet of things devices 111_ 1-111 _3 are also included in the administration group of the network hub 132 because the internet of things data of the internet of things devices 111_ 1-111 _3 needs to be sent to the access node 120 through the network hub 132. The network hub 132 may dynamically adjust the first frequency channels and the first data reporting periods of the internet of things devices 111_1 to 111_3 and the second frequency channels and the second data reporting periods of the internet of things devices 112_1 to 112_3 according to the data reporting states 111_1 to 111_3 of the internet of things devices and the data reporting states of the internet of things devices 112_1 to 112_ 3. In detail, in an embodiment, the network hub 132 may monitor the data reporting status of the internet of things devices 111_1 to 111_3 and 112_1 to 112_3 to dynamically allocate communication resources to the internet of things devices 111_1 to 111_3 and 112_1 to 112_ 3. The data reporting status is, for example, a data transmission frequency, etc. As mentioned above, the network hub 132 can dynamically adjust QoS parameters, frequency channels, data reporting time, or other parameters of each of the internet of things devices 111_1 to 111_3, 112_1 to 112_ 3. In one embodiment, the QoS parameter includes a transmission priority of the internet of things devices 111_1 to 111_3 and 112_1 to 112_3, i.e., the network hub 132 can dynamically adjust the transmission priority of each of the internet of things devices 111_1 to 111_3 and 112_1 to 112_ 3. Alternatively, in an embodiment, the network hub 132 may control the internet of things devices 111_1 to 111_3 and 112_1 to 112_3 to respectively use different frequency channels or report data packets at different communication times.
Referring to fig. 5B, before the network hub 131 is connected to the network hub 132 through the standby frequency channel BF1, the network hubs 131 and 132 respectively manage the internet of things devices 111_1 to 111_3 and the internet of things devices 112_1 to 112_ 3. The network hub 131 assigns a fourth frequency channel F1 and fourth data reporting periods T1, T2, and T3 to the internet of things devices 111_1 to 111_3, respectively, so as to control the internet of things devices 111_1 to 111_3 to report internet of things data using the fourth frequency channel F2 in the fourth data reporting periods T1, T2, and T3. The network hub 132 assigns a third frequency channel F2 and third data reporting periods T1, T2, and T3 to the internet of things devices 112_1 to 112_3, respectively, so as to control the internet of things devices 112_1 to 112_3 to report internet of things data using the third frequency channel F2 in the third data reporting periods T1, T2, and T3. As can be seen from comparing fig. 5A and fig. 5B, in response to the network hub 131 establishing a connection with the network hub 132 through the standby frequency channel BF1, the network hub 132 adjusts the data reporting time of the internet of things devices 112_1 to 112_3, i.e., the second data reporting periods T4, T5, and T6 of the internet of things devices 112_1 to 112_3 are different from the third data reporting periods T1, T2, and T3 of the internet of things devices 112_1 to 112_ 3.
However, the examples shown in fig. 5A and 5B are only exemplary, and in other embodiments, in response to the network hub 131 establishing a connection with the network hub 132 through the standby frequency channel BF1, the network hub 132 may adjust the data reporting time periods of the internet of things devices 111_1 to 111_ N to stagger the time for the internet of things devices 111_1 to 111_3 to report the internet of things data and the time for the internet of things devices 112_1 to 112_3 to report the internet of things data. In addition, in response to the network hub 131 establishing connection with the network hub 132 through the standby frequency channel BF1, the internet of things devices 111_1 to 111_3 and 112_1 to 112_3 are configured to use different data reporting periods, so that the internet of things devices 111_1 to 111_3 and 112_1 to 112_3 can use the same frequency channel to report the internet of things data without signal interference.
Fig. 6 is a diagram illustrating a method for using a backup channel according to an embodiment of the invention. Referring to fig. 6, the internet of things system 10 may further include a network hub 133 connected to the access node 120. The network hub devices 131-133 are connected to the IOT devices 111_ 1-111 _3, 112_ 1-112 _3, and 113_ 1-113 _3, respectively. In one embodiment, after the network hub 131 establishes a connection with the network hub 132 through the backup frequency channel BF1, in response to an abnormal connection between the network hub 132 and the access node 120, the network hub 132 may establish a connection with the network hub 133 through another backup frequency channel BF 2. The details of the network hub 132 establishing connection with the network hub 133 via the alternative frequency channel BF2 are similar to the details of the network hub 131 establishing connection with the network hub 132 via the alternative frequency channel BF 1. And will not be described in detail herein. The network hub 132 transfers the data of the internet of things from the internet of things devices 111_1 to 111_3, 112_1 to 112_3 to the network hub 133 through the standby frequency channel BF 2. Thus, the data of the internet of things reported by the internet of things devices 111_1 to 111_3 and 112_1 to 112_3 need to be transmitted to the internet of things service server 140 through the connection between the network hub 133 and the access node 120. Specifically, the internet of things devices 111_1 to 111_3 report the internet of things data to the internet of things service server 140 through the standby frequency channel BF1 and the another standby frequency channel BF2, that is, the internet of things data of the internet of things devices 111_1 to 111_3 are transmitted to the internet of things service server 140 through the data transmission path P1.
It should be noted that in response to the network hub 131 being connected to the network hub 132 through the backup frequency channel BF1 and the network hub 132 being connected to the network hub 133 through the backup frequency channel BF2, the network hub 133 may adjust the data reporting periods and/or frequency channels allocated to the internet of things devices 111_1 to 111_3, the internet of things devices 112_1 to 112_3 and/or the internet of things devices 113_1 to 112_ 3. Therefore, the data loss caused by transmitting too much internet of things data to the network hub device 133 at the same time can be avoided.
Fig. 7 is a diagram illustrating a method for using a backup channel according to an embodiment of the invention. Referring to fig. 7, the internet of things system 10 may further include a network hub 133 connected to the access node 120. The network hub devices 131-133 are connected to the Internet of things devices 111_ 1-111 _3, 112_ 1-112 _3, and 113_ 1-113 _3, respectively. In one embodiment, after the network hub 131 establishes connection with the network hub 132 through the backup frequency channel BF1, the network hub 131 switches from being connected to the network hub 132 to being connected to the network hub 133 through the backup frequency channel BF1 in response to the load of the network hub 132 being above the threshold. The load capacity of the hub 132 may include the number of connections of the IOT devices 112_ 1-112 _3 connected to the hub 132, the packet transmission amount of the hub 132 per unit time, or the number of packets queued in the buffer of the hub 132.
In one embodiment, during the first period, the load capacity of the hub 132 is smaller than that of the hub 133, so the hub 131 establishes a connection with the hub 132 through the BF 1. Thereafter, in a second period after the first period, the load capacity of the network hub 132 is changed to be greater than that of the network hub 133, so that the network hub 131 can switch from being connected to the network hub 132 to being connected to the network hub 133 through the standby frequency channel BF 1. As shown in fig. 7, after the hub device 131 is switched from being connected to the hub device 132 to being connected to the hub device 133 through the standby frequency channel BF1, the data transmission path P2 of the internet of things device 111_1 reporting the internet of things data is changed to the data transmission path P3.
In summary, in the embodiments of the present invention, the network hub is disposed between the internet of things device and the access node, so that the burden of the existing base station and backhaul can be greatly reduced. When the connection between a certain network hub device and the access node is abnormal, the network hub device can be connected to another network hub device through the standby frequency channel, so that the internet of things device managed by the network hub device can correctly report the internet of things data through the standby frequency channel. In addition, when the two network line concentration devices are connected through the standby forest rate channel, the network line concentration device normally connected with the access node can dynamically adjust the frequency channel and the data return time used by the internet of things device, so that the congestion phenomenon caused by networking of a large number of internet of things devices can be relieved, the probability of data collision is reduced, and a reliable network environment is constructed for the internet of things system. Therefore, the network line concentration device provided by the embodiment of the invention can be applied to different Internet of things services and application scenes, so that the Internet of things services can be developed more stably, more flexibly and more permanently.
Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (20)
1. An internet of things system, comprising:
the first network hub device is connected to at least one first Internet of things device;
the second network hub device is connected to at least one second networking device;
at least one access node connected to the first network hub device and the second network hub device;
an IOT service server connected to the first network hub and the second network hub via the at least one access node,
in response to an abnormal connection between the first network hub and the at least one access node, the first network hub establishes a connection with the second network hub via a backup frequency channel, and the first internet of things device reports internet of things data to the internet of things service server via the backup frequency channel between the first network hub and the second network hub.
2. The internet of things system of claim 1, wherein the internet of things service server sends control information to the first internet of things device via the backup frequency channel between the first network hub device and the second network hub device after the first network hub device establishes a connection with the second network hub device via the backup frequency channel.
3. The internet of things system of claim 1, wherein the first network hub device picks the second network hub device from a plurality of neighboring network hub devices as a function of location information or load status of the neighboring network hub devices.
4. The internet of things system of claim 1, wherein after the first network hub device connects to the second network hub device via the backup frequency channel, the second network hub device assigns a first frequency channel and a first data reporting period to the first internet of things device and a second frequency channel and a second data reporting period to the second network device to control the first internet of things device to report back internet of things data using the first frequency channel during the first data reporting period and to control the second network device to report back internet of things data using the second frequency channel during the second data reporting period.
5. The internet of things system of claim 4, wherein the first data reward period of the first internet of things device is different than the second data reward period of the second internet of things device.
6. The internet of things system of claim 4, wherein the second network hub device assigns a third frequency channel and a third data reporting period to the second network hub device to control the second network hub device to report internet of things data using the third frequency channel during the third data reporting period before the first network hub device connects to the second network hub device via the backup frequency channel.
7. The internet of things system of claim 6, wherein the second data reward period for the second networked device is distinct from the third data reward period for the second networked device.
8. The internet of things system of claim 4, wherein the second internet hub device dynamically adjusts the first frequency channel and the first data reporting period of the first internet of things device and the second frequency channel and the second data reporting period of the second internet of things device according to a data reporting status of the first internet of things device and a data reporting status of the second internet of things device.
9. The internet of things system of claim 1, further comprising a third network hub connected to the at least one access node, wherein in response to an abnormal connection between the second network hub and the at least one access node, the second network hub establishes a connection with the third network hub via another backup frequency channel, and the first internet of things device reports internet of things data to the internet of things service server via the backup frequency channel and the another backup frequency channel.
10. The internet of things system of claim 1, further comprising a third network hub connected to the at least one access node, the first network hub switching from being connected to the second network hub to being connected to the third network hub via the backup frequency channel in response to a load of the second network hub being above a threshold.
11. A standby channel using method is applicable to an Internet of things system, and comprises the following steps:
establishing connection between at least one first internet of things device and a first network hub device, and establishing connection between the first network hub device and at least one access node;
establishing a connection between at least one second networking device and a second network hub device, and establishing a connection between the second network hub device and the at least one access node;
in response to an abnormal connection between the first network hub and the at least one access node, establishing a connection with the second network hub via a backup frequency channel through the first network hub; and
reporting the IOT data of the first IOT device to the IOT service server via the backup frequency channel between the first and second network hub devices.
12. The backup tunnel using method of claim 11, further comprising:
after the first network hub device establishes a connection with the second network hub device via the backup frequency channel, sending control information to the first internet of things device via the backup frequency channel between the first network hub device and the second network hub device through the internet of things service server.
13. The method of claim 11, wherein prior to the step of establishing a connection with the second network hub device through the backup frequency channel by the first network hub device in response to an abnormality occurring in the connection between the first network hub device and the at least one access node, further comprising:
and selecting the second network line concentration device from the adjacent network line concentration devices through the first network line concentration device according to the position information or the load state of the adjacent network line concentration devices.
14. The method for using the backup tunnel according to claim 11, wherein the step of reporting the internet-of-things data of the first internet-of-things device back to the internet-of-things service server via the backup frequency tunnel between the first network hub and the second network hub comprises:
after the first network hub device is connected to the second network hub device via the backup frequency channel, assigning, by the second network hub device, a first frequency channel and a first data reporting period to the first internet of things device and a second frequency channel and a second data reporting period to the second internet of things device, so as to control the first internet of things device to report back internet of things data using the first frequency channel in the first data reporting period and control the second internet of things device to report back internet of things data using the second frequency channel in the second data reporting period.
15. The backup tunnel use method of claim 14, wherein the first data reward period of the first internet of things device is different from the second data reward period of the second internet of things device.
16. The backup tunnel use method of claim 14, the method further comprising:
before the first network hub device is connected to the second network hub device via the backup frequency channel, assigning a third frequency channel and a third data reporting period to the second networking device through the second network hub device, so as to control the second networking device to report the internet of things data using the third frequency channel in the third data reporting period.
17. The backup tunnel usage method of claim 16, wherein the second data reward period of the second networked device is different from the third data reward period of the second networked device.
18. The backup tunnel use method of claim 14, the method further comprising:
dynamically adjusting, by the second network hub device, the first frequency channel and the first data reporting period of the first internet of things device and the second frequency channel and the second data reporting period of the second internet of things device according to the data reporting state of the first internet of things device and the data reporting state of the second internet of things device.
19. The method for using a backup tunnel according to claim 11, wherein after the step of reporting back the internet of things data of the first internet of things device to the internet of things service server via the backup frequency tunnel between the first network hub device and the second network hub device, the method further comprises:
in response to an abnormal connection between the second network hub device and the at least one access node, establishing a connection with a third network hub device through another standby frequency channel by the second network hub device, wherein the third network hub device is connected to the service server of the internet of things through the at least one access node; and
after the second network hub device establishes a connection with the third network hub device via the other backup frequency channel, the internet-of-things data of the first internet-of-things device is reported to the internet-of-things service server via the backup frequency channel and the other backup frequency channel.
20. The method for using a backup tunnel according to claim 11, wherein after the step of reporting back the internet of things data of the first internet of things device to the internet of things service server via the backup frequency tunnel between the first network hub device and the second network hub device, the method further comprises:
in response to the load of the second hub device being above a threshold, switching from being connected to the second hub device to being connected to a third hub device via the backup frequency channel by the first hub device, wherein the third hub device is connected to the service server via the at least one access node.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105025594A (en) * | 2015-06-23 | 2015-11-04 | 广东北斗平台科技有限公司 | Long-distance internet of things data transmission system and wireless router thereof |
| US20160241988A1 (en) * | 2014-12-31 | 2016-08-18 | The Detection Group, Inc. | Facility communications infrastructure |
| WO2020060143A1 (en) * | 2018-09-21 | 2020-03-26 | 삼성전자 주식회사 | Method and device for controlling transmission power in wireless communication system |
| WO2020214264A1 (en) * | 2019-04-17 | 2020-10-22 | Qualcomm Incorporated | Acknowledgment messaging for resource reservations |
-
2020
- 2020-12-28 CN CN202011584182.3A patent/CN114760293B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160241988A1 (en) * | 2014-12-31 | 2016-08-18 | The Detection Group, Inc. | Facility communications infrastructure |
| CN105025594A (en) * | 2015-06-23 | 2015-11-04 | 广东北斗平台科技有限公司 | Long-distance internet of things data transmission system and wireless router thereof |
| WO2020060143A1 (en) * | 2018-09-21 | 2020-03-26 | 삼성전자 주식회사 | Method and device for controlling transmission power in wireless communication system |
| WO2020214264A1 (en) * | 2019-04-17 | 2020-10-22 | Qualcomm Incorporated | Acknowledgment messaging for resource reservations |
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