WO2021018205A1 - Internet of things broadcasting method and device, broadcasting station and storage medium - Google Patents

Abstract

Disclosed in the present application are an Internet of Things (IoT) broadcasting method and device, a broadcasting station and a storage medium. The IoT broadcasting method is applied to a broadcasting station, and the IoT broadcasting method comprises: a broadcasting station using digital broadcasting to send a service channel signal to a terminal in a preset area; the broadcasting station acquiring a service subscription request which is fed back by the terminal on the basis of the service channel signal, and determining a target subscription service according to the service subscription request; the broadcasting station sending the target subscription service to a network service program; if the broadcasting station receives target service content which is fed back by the network service program on the basis of the target subscription service, then using digital broadcast to send the target service content to the terminal in the preset area.

Description

Internet of things broadcasting method, device, broadcasting station and storage medium

This application claims the priority of the Chinese patent application filed on July 29, 2019, with application number 201910698929.9 and titled "Internet of Things Broadcasting Method, Device, Broadcasting Station, and Storage Medium", the entire content of which is incorporated herein by reference Applying.

Technical field

This application relates to the field of Internet of Things application technologies, and in particular to an Internet of Things broadcasting method, device, broadcasting station and storage medium.

Background technique

Currently, existing positioning terminals obtain differential data through mobile networks to achieve precise positioning functions. The high-density connection of the Internet of Things application system makes a large number of terminal devices work at the same time, which can easily cause the base station network to be overwhelmed and unable to obtain the high-precision positioning of the terminal device, thereby degrading the positioning accuracy, making the base station unable to provide corresponding information based on the location of the terminal device. The location service function reduces the effectiveness and practicality of the location service function.

Technical solutions

The main purpose of this application is to provide an Internet of Things broadcasting method, device, broadcasting station and storage medium, aiming to solve the technical problem that Internet of Things terminal equipment cannot obtain effective location service functions in the communication network of the existing base station.

To achieve the foregoing objective, an embodiment of the present application provides an Internet of Things broadcasting method. The Internet of Things broadcasting method is applied to a broadcasting station, and the Internet of Things broadcasting method includes:

The broadcasting station sends service channel signals to terminals in the preset area in the form of digital broadcasting;

The broadcasting station obtains the service subscription request fed back by the terminal based on the service channel signal, and determines the target subscription service according to the service subscription request;

The broadcasting station sends the target subscription service to the network service program;

If the broadcasting station receives the target service content fed back by the network service program based on the target subscription service, it sends the target service content to the terminals in the preset area in the form of digital broadcasting.

In an embodiment, the step of the broadcasting station obtaining the service subscription request fed back by the terminal based on the service channel signal, and determining the target subscription service according to the service subscription request includes:

The broadcasting station separately obtains all service subscription requests fed back by each terminal based on different service channel signals, and determines the service subscription table of the corresponding terminal according to each service subscription request;

Determine the channel subscription table of the broadcasting station according to the service subscription table, and determine the target subscription service of the broadcasting station according to the channel subscription table.

In an embodiment, if the broadcasting station receives the target service content fed back by the network service program based on the target subscription service, it sends the target service content to the terminals in the preset area in the form of digital broadcasting The steps include:

The broadcasting station receives the target service content fed back by the network service program based on the target subscription service, and obtains the local location parameter of the broadcasting station;

The broadcasting station analyzes the local target service content in the target service content according to the local location parameter;

The broadcasting station transmits the local target service content to the terminals in the preset area in the form of digital broadcasting.

In an embodiment, the service subscription request includes a first fuzzy location parameter,

The step of determining a target subscription service according to the service subscription request includes:

The broadcasting station determines the target subscription service according to the service subscription request and the first fuzzy location parameter, and the target service content that the broadcasting station receives based on the target subscription service feedback includes the second fuzzy location parameter;

The step of sending the target service content to terminals in the preset area in the form of digital broadcasting includes:

The fuzzy area in the preset area is determined according to the second fuzzy position parameter, and the target service content is sent to the terminal in the fuzzy area in the form of digital broadcasting.

In an embodiment, the step of the broadcasting station obtaining the service subscription request fed back by the terminal based on the service channel signal and determining the target subscription service according to the service subscription request further includes:

The broadcasting station obtains the service subscription request fed back by the terminal based on the service channel signal, and detects whether the service subscription request has a remote invocation request;

If so, obtain the remote call parameters in the service subscription request, send the remote call parameters and the service subscription request to the network service program, and obtain the network service program based on the remote call parameters and the Service subscription requests remote service content fed back in the form of digital broadcasting;

If not, execute the step of determining the target subscription service according to the service subscription request.

In an embodiment, the target service content includes real-time parameters,

If the broadcasting station receives the target service content fed back by the network service program based on the target subscription service, the step of transmitting the target service content to the terminals in the preset area in the form of digital broadcasting includes:

The broadcasting station receives the target service content fed back by the network service program based on the target subscription service, and detects whether the target service content has real-time parameters;

If yes, push the target service content to the first priority queue;

If not, push the target service content to the second priority queue;

The broadcasting station sends the target service content to the terminals in the preset area in the form of digital broadcasting in sequence according to the first priority queue and the second priority queue.

In an embodiment, the service channel signal includes a channel name, and the channel name serves as an anonymous name for each terminal service subscription request.

This application also provides an Internet of Things broadcasting device, which is applied to a broadcasting station, and the Internet of Things broadcasting device includes:

The sending module is used to send service channel signals to terminals in the preset area in the form of digital broadcasting;

The determining module is configured to obtain the service subscription request fed back by the terminal based on the service channel signal, and determine the target subscription service according to the service subscription request;

A sending module, used to send the target subscription service to a network service program;

The broadcasting module is configured to send the target service content to the terminal in the preset area in the form of digital broadcasting if the target service content fed back by the network service program based on the target subscription service is received.

In an embodiment, the determining module includes:

The obtaining unit is configured to obtain all service subscription requests fed back by each terminal based on different service channel signals, and determine the service subscription table of the corresponding terminal according to each service subscription request;

The first determining unit is configured to determine the channel subscription table of the broadcasting station according to the service subscription table, and determine the target subscription service of the broadcasting station according to the channel subscription table.

In an embodiment, the broadcasting module includes:

A receiving unit, configured to receive the target service content fed back by the network service program based on the target subscription service, and obtain the local location parameter of the broadcasting station;

A parsing unit, configured to analyze the local target service content in the target service content according to the local location parameter;

The first sending unit is configured to send the local target service content to the terminal in the preset area in the form of digital broadcasting.

In an embodiment, the service subscription request includes a first fuzzy location parameter, and the determining module includes:

The second determining unit is configured to determine the target subscription service according to the service subscription request and the first fuzzy location parameter, and the target service content that the broadcast station receives based on the target subscription service feedback includes the second fuzzy location parameter;

The broadcasting module includes:

The fuzzy unit is configured to determine the fuzzy area in the preset area according to the second fuzzy position parameter, and send the target service content to the terminal in the fuzzy area in the form of digital broadcasting.

In an embodiment, the determining module further includes:

The first detection unit is configured to obtain a service subscription request fed back by the terminal based on the service channel signal, and detect whether there is a remote call request in the service subscription request;

The first determining unit is configured to, if yes, obtain the remote call parameters in the service subscription request, send the remote call parameters and the service subscription request to the network service program, and obtain the network service program based on all The remote invocation parameters and the remote service content fed back in the form of digital broadcast of the service subscription request;

The second judgment unit is configured to, if not, execute the function of determining the target subscription service according to the service subscription request.

In an embodiment, the target service content includes real-time parameters, and the broadcast module includes:

The second detection unit is configured to receive the target service content fed back by the network service program based on the target subscription service, and detect whether the target service content has real-time parameters;

The first priority unit is configured to, if yes, push the target service content to the first priority queue;

The second priority unit is configured to, if not, push the target service content to the second priority queue;

The second sending unit is configured to send the target service content to the terminals in the preset area in the form of digital broadcast in sequence according to the first priority queue and the second priority queue.

In an embodiment, the service channel signal includes a channel name, and the channel name serves as an anonymous name for each terminal service subscription request.

In addition, in order to achieve the above object, this application also provides a broadcasting station, the broadcasting station including: a memory, a processor, and an Internet of Things broadcasting program stored on the memory and running on the processor, wherein:

When the Internet of Things broadcasting program is executed by the processor, the steps of the Internet of Things broadcasting method as described above are implemented.

In addition, in order to achieve the above purpose, this application also provides a computer storage medium;

The computer storage medium stores an Internet of Things broadcasting program, and when the Internet of Things broadcasting program is executed by a processor, the steps of the Internet of Things broadcasting method as described above are realized.

The broadcasting station of this application sends service channel signals to the terminals in the preset area in the form of digital broadcasting; the broadcasting station obtains the service subscription request fed back by the terminal based on the service channel signal, and determines the target subscription service according to the service subscription request; the broadcasting station Send the target subscription service to the network service program; if the broadcast station receives the target service content fed back by the network service program based on the target subscription service, it will send all the content to the terminals in the preset area in the form of digital broadcasting. Describe the target service content. This application optimizes the positioning accuracy, enables the broadcasting station to provide corresponding location service functions based on the location of the terminal equipment, improves the effectiveness and practicability of the location service function, and solves the problem that the terminal equipment of the Internet of Things cannot be effectively obtained in the communication network of the existing base station. The technical problem of the location service function.

Description of the drawings

FIG. 1 is a schematic diagram of a device structure of a hardware operating environment involved in a solution of an embodiment of the present application;

2 is a schematic flowchart of an embodiment of an Internet of Things broadcasting method according to this application;

Figure 3 is a schematic diagram of a service subscription table and a channel subscription table in the application for the Internet of Things broadcasting method;

Figure 4 is a schematic diagram of the data distribution route design of the target service content within the broadcasting station of the application;

Figure 5 is a schematic diagram of the system configuration of the location-oriented service-oriented IoT system of this application;

6 is a schematic diagram of the hardware structure of an embodiment of a digital broadcasting base station according to this application;

FIG. 7 is a schematic diagram of the hardware structure of an embodiment of the Internet of Things terminal of this application;

Figure 8 is a diagram of the functional modules of the application data dissemination cloud platform;

Figure 9 is a schematic diagram of the data format of the location service information frame of this application.

The realization of the purpose, functional characteristics and advantages of the application will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

Embodiments of the invention

It should be understood that the specific embodiments described here are only used to explain the application, and are not used to limit the application.

As shown in FIG. 1, FIG. 1 is a schematic diagram of the device structure of the hardware operating environment involved in the solution of the embodiment of the present application.

The broadcasting station in the embodiment of the present application may be a digital broadcasting base station or a digital server device.

As shown in FIG. 1, the broadcasting station may include a processor 1001, such as a CPU, a network interface 1004, a user interface 1003, a memory 1005, and a communication bus 1002. Among them, the communication bus 1002 is used to implement connection and communication between these components. The user interface 1003 may include a display screen (Display) and an input unit such as a keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a WI-FI interface). The memory 1005 may be a high-speed RAM memory, or a stable memory (non-volatile memory), such as a magnetic disk memory. Optionally, the memory 1005 may also be a storage device independent of the foregoing processor 1001.

Those skilled in the art can understand that the structure of the device shown in FIG. 1 does not constitute a limitation on the device, and may include more or fewer components than those shown in the figure, or a combination of certain components, or different component arrangements.

As shown in Fig. 1, a memory 1005 as a computer storage medium may include an operating system, a network communication module, a user interface module, and an Internet of Things broadcast program.

In the device shown in FIG. 1, the network interface 1004 is mainly used to connect to a back-end server and perform data communication with the back-end server; the user interface 1003 is mainly used to connect to a client (user side) and perform data communication with the client; and the processor 1001 can be used to call the Internet of Things broadcasting program stored in the memory 1005, and perform operations in the following embodiments of the Internet of Things broadcasting method.

Based on the above hardware structure, an embodiment of the Internet of Things broadcasting method of this application is proposed.

The emergence of a large number of applications of the Internet of Things has greatly enriched the means for people to obtain information, and promoted the informatization and intelligence of a series of applications such as environmental monitoring, traffic management, logistics management, and smart grids. These new application services not only need to process a large amount of real-time information obtained from external sensors, but also need to consider the close correlation between the application itself and time and space information to achieve the coordination of complex perception services. For example, different terminals in the sensor network need to perceive a series of temporal and spatial-related environmental attributes, such as the surrounding light, temperature, humidity, movement of objects, etc., so that application services can make timely response to the “scenarios” or “events” that need attention. response. This makes Location-based Services (LBS) one of the most promising applications in the Internet of Things. Most public services and commercial applications based on the Internet of Things rely on the location information of the terminal, and many perception data only It only makes sense when the accurate location information of the terminal is determined. Accurate terminal positioning is playing an increasingly important role in IoT location service applications.

The rapid development of the Internet of Things location service application provides convenience to users, but also exposes some problems with the Internet of Things technology:

1. The Internet of Things technology itself lacks precise positioning capabilities;

2. The transmission of differential data will occupy a large amount of downstream bandwidth, which is difficult to meet real-time requirements;

3. The lack of regional fuzzy query capabilities makes it difficult to identify many terminals in a specific area;

4. Terminal location information involves serious privacy threats, restricting the development of the Internet of Things;

5. The real-time performance of multi-terminal batch interactive operation is low, and the application in specific occasions is limited.

This application uses digital broadcasting to solve the above problems, especially narrow-band wide-area digital broadcasting technologies, such as CDRadio, CDR, and DRM, which also have some key features of LPWAN technology: low power consumption, wide-area coverage, and high-density connections. Especially in terms of connection density, the broadcasting technology system can theoretically support unlimited terminal connections, especially in line with the Internet of Things MMTC (Massive machine-type-communications, a huge amount of machine type communication) development direction.

Using digital broadcasting technology (such as CDRadio) to broadcast differential data to the underlying network terminal of the Internet of Things can help the terminal implement differential positioning technology, so that the new Internet of Things architecture has the ability to accurately locate. At the same time, the time correlation and space correlation problems of differential data transmission are well avoided. First of all, the transmission delay of digital broadcasting is fixed and is not affected by the number of terminal connections. The real-time nature of differential data transmission is no longer a problem. Secondly, the location of the digital broadcasting base station is fixed, and its signal coverage area is known information. The problem of matching differential data with terminals in a specific area is easily solved, because the problem of "what is in the designated area" has become a "designated object ( Where is the effective area of differential data (the coverage area of the broadcast base station signal)”.

As far as the terminal is concerned, as long as it can receive digital broadcast signals, it is naturally one of the answers to "what is in the designated area?" This provides location services with the fuzzy query capability of the area (broadcast base station signal coverage area). Under this mechanism, the terminal can remain silent, without consuming uplink communication bandwidth and power consumption to upload its own location information, and the problem of location privacy exposure is also avoided. For situations where it is necessary to use terminal location information to provide location services to the outside world, this application also proposes two processing methods (see the content of the invention), which can avoid the risk of location privacy exposure.

Because broadcasting technology naturally has the characteristics of fixed signal transmission delay and unlimited connections. Through the digital broadcast channel, the homogeneous control data for multiple terminals (such as traffic light control in a certain urban area) can be issued, which can solve the real-time and synchronization problems of many terminal operations, especially suitable for batch real-time control. Types of IoT applications.

This application provides an Internet of Things broadcasting method, which is mainly applied to broadcasting stations. In an embodiment of the Internet of Things broadcasting method, referring to FIG. 2, the Internet of Things broadcasting method includes:

Step S10, the broadcasting station sends a service channel signal to the terminal in the preset area in the form of digital broadcasting;

Step S20: The broadcasting station obtains the service subscription request fed back by the terminal based on the service channel signal, and determines the target subscription service according to the service subscription request;

Step S30, the broadcasting station sends the target subscription service to the network service program;

Step S40: If the broadcasting station receives the target service content fed back by the network service program based on the target subscription service, it sends the target service content to the terminal in the preset area in the form of digital broadcasting.

The details are as follows:

Step S10, the broadcasting station sends a service channel signal to the terminal in the preset area in the form of digital broadcasting;

The new Internet of Things architecture adds digital broadcasting to the underlying network of the Internet of Things system, and obtains a low-latency, spatial location-related downlink channel. In order to facilitate the distribution of data content, a publish-subscribe design model can be adopted at the network service software level to create a downstream publish-subscribe channel for each broadcast station to form a distributed publish-subscribe coverage network based on spatial location information. The Internet of Things service provides an operating environment based on regional location (broadcasting station signal coverage area). The architecture of the publish and subscribe system is shown in the figure below.

The terminal only needs to submit its own requirements, which is embodied as a subscription, and then can receive the service content actively pushed by the service system without having to repeatedly submit queries.

This mode can significantly reduce the pressure on network services and improve user experience. For example, during the Olympic Games, a large number of the same queries (such as gold medals in various countries) were concentrated in a short period of time, causing the server to overload or even crash. Therefore, the use of an asynchronous event-driven model based on publish and subscribe can significantly increase the system service capacity. As an effective data distribution method, publish and subscribe can naturally realize the loosely coupled interaction mode of many-to-many between data producers and consumers, which conforms to the dynamic and asynchronous characteristics of network services, and is useful for creating data-centric network services. is crucial. With the popularization of the mobile Internet and the Internet of Things, data distribution and sharing have become increasingly important, and publish and subscribe have gradually become the norm in the communication mode. )

In this application, a broadcasting station sends service channel signals to terminals in a preset area covered by the broadcasting station in the form of digital broadcasting. The service channel signal includes a channel name, and the channel name serves as an anonymous name for each terminal service subscription request.

Step S20: The broadcasting station obtains the service subscription request fed back by the terminal based on the service channel signal, and determines the target subscription service according to the service subscription request;

After receiving the digital broadcast signal, the IoT terminal will feedback the corresponding service subscription request based on the user's operation, such as weather forecast, traffic status, etc. As long as it can receive the signal, it must correspond to the broadcast station's publish and subscribe channel.

Specifically, the step of obtaining the service subscription request fed back by the terminal based on the service channel signal by the broadcasting station and determining the target subscription service according to the service subscription request includes:

Step A1: The broadcasting station separately obtains all service subscription requests fed back by each terminal based on different service channel signals, and determines the service subscription table of the corresponding terminal according to each service subscription request;

Step A2: Determine the channel subscription table of the broadcasting station according to the service subscription table, and determine the target subscription service of the broadcasting station according to the channel subscription table.

It is understandable that there can be multiple service channel signals sent by the broadcasting station, which can be selected by different terminals. The terminal sends a service subscription request through an uplink channel such as NB-IoT to subscribe to the service content related to the spatial location of the channel B _i ; and the broadcast station generates a service subscription table CT based on the subscription information of all terminals (that is, the service subscription table formed by different terminals) Terminal-service subscription table CT), calculate the subscription table BT of the publishing and subscription channel.

Referring to FIG. 3, C of the service subscription table CT represents the terminal identifier, T represents the service, the value 1 indicates that the terminal corresponding to the column has subscribed to the service corresponding to the row, and 0 indicates that the service is not subscribed. The subscription table CT in the above figure expresses the subscription status of m services from T ₁ to T _m by n terminals C ₁ to C _n . For a certain service T _j , as long as one terminal subscribes to the service, the corresponding channel B _i needs to subscribe to the service, and the i-th column and j-th row of the channel subscription table BT need to be set to 1. The number of columns k (the number of broadcast stations) of the channel subscription table BT is much smaller than the number of columns n (the number of IoT terminals) of the subscription table CT, which is the key to achieving high MMTC concurrency. It can be seen from the channel subscription table that the current broadcast station needs to subscribe to all target subscription services.

Further, the step of the broadcasting station obtaining the service subscription request fed back by the terminal based on the service channel signal, and determining the target subscription service according to the service subscription request further includes:

Step B1: The broadcasting station obtains the service subscription request fed back by the terminal based on the service channel signal, and detects whether the service subscription request has a remote invocation request;

Step B2, if yes, obtain the remote call parameters in the service subscription request, send the remote call parameters and the service subscription request to the network service program, and obtain the network service program based on the remote call parameters And the remote service content fed back in the form of digital broadcast of the service subscription request;

Step B3, if not, perform the step of determining the target subscription service according to the service subscription request.

In order to avoid the leakage of the terminal's private location, this application proposes a remotely called location service mechanism, which transfers the computing tasks of the location service from the cloud application system to the terminal's IoT terminal. After the terminal completes the calculation, it only returns the result of the location service (for example, billing information) without revealing its own precise location information.

The broadcasting station only acts as an information intermediary between the terminal and the network service program, thus avoiding the leakage of the terminal's private location information.

The Internet of Things terminal implements a RPC (Remote Procedure Call (remote procedure call) service, 1. The broadcasting station obtains the service subscription request, and checks the request to determine whether there is a remote call request. If so, obtain the remote call parameters, and send the remote call parameters and service subscription request directly to the network service program; 2. The network service program extracts the precise location information of the terminal in the service that needs to participate in the calculation process, and the calculation process The execution program and other necessary input parameters are used as the parameters of the RPC function; 3. The terminal's corresponding publish and subscribe channel is determined anonymously by the terminal's location (ie channel ID), and the network service program acts as the publisher and takes the RPC parameters as the service content , Push to the publish and subscribe channel; 4. The broadcast station broadcasts these service content (ie RPC parameters) to the target terminal in the signal coverage area based on the publish and subscribe channel; 5. After the terminal receives the RPC parameter, it gets the calculation process Execute the program and input parameters, and then input its own precise location data as parameters into the execution program to run the calculation process; 6. After the calculation is completed, the terminal returns the calculation result to the location service application system through an uplink channel such as NB-IoT. The RPC task is completed; 7. The network service program receives the RPC result, continues to perform other calculation processes of the location service, and returns the final result to the user.

Specifically, use the subscription weather forecast as an example. The terminal subscribes to the weather forecast service, and the broadcasting station determines the content of the celestial forecast service. However, due to the existence of RPC remote call parameters, it does not obtain the specific terminal location. Instead, the RPC remote call parameters and service subscription request are sent to the network service program. The service program configures the corresponding weather forecast content and then returns to the broadcasting station to obtain the weather forecast information directly. In this process, the broadcasting station acts as an information intermediary and only performs the role of an information transmission medium.

Step S30, the broadcasting station sends the target subscription service to the network service program;

Step S40: If the broadcasting station receives the target service content fed back by the network service program based on the target subscription service, it sends the target service content to the terminal in the preset area in the form of digital broadcasting.

When the network service program generates corresponding data content according to the target subscription service of the broadcast station, the routing engine in the broadcast station pushes the data content to the subscribers of the service according to the target service content in the target subscription service and the subscription status of the channel subscription table BT Channel (broadcast station);

After the broadcast station receives the data content, it modulates it into a wireless digital broadcast signal and broadcasts it to IoT terminals (subscribers) in the signal coverage area.

Specifically, if the broadcasting station receives the target service content fed back by the network service program based on the target subscription service, the step of sending the target service content to the terminal in the preset area in the form of digital broadcasting includes :

Step C1: The broadcasting station receives the target service content fed back by the network service program based on the target subscription service, and obtains the local location parameter of the broadcasting station;

Step C2: The broadcasting station analyzes the local target service content in the target service content according to the local location parameter;

Step C3: The broadcasting station transmits the local target service content to the terminals in the preset area in the form of digital broadcasting.

In this embodiment, the built-in routing engine of the broadcasting station can perform location filtering on target service content. Many target service contents naturally have location attributes, such as weather forecast, real-time road conditions, differential data, street light control, etc. Take weather forecast as an example. Terminals that have subscribed to the service usually only need to receive weather information at their location, not all. When the broadcast station routing engine publishes the data content of the weather forecast service, it is allocated to the specific publish and subscribe channel (broadcast station) according to the local location parameters of the broadcast station (for example, the city), so that the terminals in the signal coverage area of the broadcast station can obtain Local weather information. Similarly, the effective area of differential data (for example, within a radius of 50 kilometers around the base station), and the target area controlled by street lights (for example, a certain urban area), can be used as the calculation parameters of the routing engine.

Therefore, the routing engine in this application uses a location-based routing mechanism, which divides the target service content according to local location parameters, and the broadcasting station will send these target service content data to all subscribers in the signal coverage area (IoT terminal ) Push.

Further, the service subscription request includes a first fuzzy location parameter, and the step of determining a target subscription service according to the service subscription request includes:

The broadcasting station determines the target subscription service according to the service subscription request and the first fuzzy location parameter; the target service content received by the broadcasting station based on the target subscription service feedback includes the second fuzzy location parameter;

The sending the target service content to the terminal in the preset area in the form of digital broadcasting includes:

The fuzzy area in the preset area is determined according to the second fuzzy position parameter, and the target service content is sent to the terminal in the fuzzy area in the form of digital broadcasting.

The first fuzzy location parameter is the terminal fuzzy location parameter in the service subscription request. The broadcasting station obtains the target subscription service according to the service subscription request and the first fuzzy location parameter, and after the target subscription service is sent to the network service program, the feedback target service content includes the second fuzzy location parameter. The first fuzzy position parameter and the second fuzzy position parameter are basically the same, and can be more accurate or fuzzy according to the modification of the network service program. According to the second fuzzy position parameter, the fuzzy area in the preset area can be determined, that is, the fuzzy area is smaller than the preset area, but it is still not accurate. The broadcasting station transmits the target service content to the terminal in the fuzzy area in the form of digital broadcasting.

The broadcasting station obtains the first fuzzy location parameter in the service subscription request from the terminal, that is, the broadcasting station does not obtain the accurate location information of the terminal, but obtains a fuzzy parameter. The first fuzzy location parameter includes a larger area. Information to hide the true location of the terminal that cannot be obtained. At this time, what the terminal provides is the real identity, but the location information is vague. This fuzzification method is more flexible and controllable and has no obvious defects. The target subscription service can be determined according to the fuzzy location parameter of the terminal and the service subscription request.

In the IoT architecture proposed in this embodiment, the signal coverage area of the digital broadcasting base station has a sufficiently large area. Taking digital broadcasting as an example, the signal coverage radius is usually 30-50 kilometers. As long as many terminals in the signal coverage area receive the broadcast signal, they can use the identification (channel ID) corresponding to the broadcast station they access as their location anonymity. The location anonymously corresponds to the signal coverage area of the broadcasting station, thus hiding the precise location information of the terminal.

The network service program can only obtain the anonymous location information of the terminal, and implement location service applications such as fuzzy query of the area, but cannot query the precise location of the terminal, which significantly reduces the risk of location privacy exposure.

Understandably, avoiding privacy leakage can also include identity anonymity. The terminal uses an alias to replace the real identity. Although the location information is accurate, the attacker cannot associate it with the user identity. It should be noted that many IoT applications are location-based, and terminal location information often contains user identity information. Even if identity anonymity is adopted, an attacker may infer the identity of the terminal owner by analyzing the historical trajectory of a terminal.

The broadcasting station of this application sends service channel signals to the terminals in the preset area in the form of digital broadcasting; the broadcasting station obtains the service subscription request fed back by the terminal based on the service channel signal, and determines the target subscription service according to the service subscription request; the broadcasting station Send the target subscription service to the network service program; if the broadcast station receives the target service content fed back by the network service program based on the target subscription service, it will send all the content to the terminals in the preset area in the form of digital broadcasting. Describe the target service content. This application optimizes the positioning accuracy, enables the broadcasting station to provide corresponding location service functions based on the location of the terminal equipment, improves the effectiveness and practicability of the location service function, and solves the problem that the terminal equipment of the Internet of Things cannot be effectively obtained in the communication network of the existing base station. The technical problem of the location service function.

Further, based on the first embodiment, a second embodiment of the present method is proposed. In this embodiment, if the broadcasting station receives the target service content fed back by the network service program based on the target subscription service, then The step of sending the target service content to the terminal in the preset area in the form of digital broadcasting includes:

Step D1: The broadcasting station receives the target service content fed back by the network service program based on the target subscription service, and detects whether the target service content has real-time parameters;

Step D2, if yes, push the target service content to the first priority queue;

Step D3, if not, push the target service content to the second priority queue;

Step D4: The broadcasting station sends the target service content to the terminals in the preset area in the form of digital broadcasting in sequence according to the first priority queue and the second priority queue.

The broadcasting station receives the target service content and detects whether there are real-time parameters in the target service content. If there is, the content is placed in the first priority queue, otherwise, it is placed in the second priority queue. Real-time parameters are usually time-sensitive data, such as traffic conditions, weather forecasts, and so on. After the priority is determined, the data can be distributed by the broadcasting station, from the first priority queue with the highest priority to broadcast. After the target service content of the first priority queue is distributed, then the target service content of the second priority queue is distributed.

Referring to Figure 4, Figure 4 is the data distribution routing mechanism of the target service content inside the broadcasting station, which is implemented through the built-in routing engine:

1. The network service program submits the target service content through the interface provided by the input management module, and the attributes of the target service content include spatial location parameters and optional real-time parameters;

2. The input management module receives service content, selects the target input queue cache according to real-time parameters, puts real-time application services (such as differential data) into the first priority queue, and puts non-real-time applications or content with no real-time parameters set Low priority queue (this application only describes two priorities, high and low, in the actual system, more priorities can be set as needed);

3. The priority scheduling engine can select multiple algorithms such as absolute priority, regular polling, weight distribution, etc., try to process the first priority queue first, while avoiding the blocking problem of the lower second priority queue. Queue scheduling, extract the service content from it, and transfer it to the matching calculation engine for processing;

4. The matching calculation engine extracts the spatial location parameters of the service content, and performs matching calculations with the spatial location parameters of the publish-subscribe channel (broadcasting station), finds the target publish-subscribe channel that needs to be sent, records the identification of these channels, and obtains the channel ID Array G _prep ;

5. According to the subscription status recorded in the subscription table BT, the matching calculation engine extracts the column number (channel ID) with a value of 0 in the row of the current service to obtain the array G _idle , and then repeats the two array elements G _prep and G _idle The part of is deleted from G _prep , and G _{dest is} obtained;

6. The matching calculation engine adds the array G _dest to the spatial position parameter of the service content, and then writes it to the output queue buffer;

7. The output management module takes out the service content from the output queue, reads the channel ID array G _dest in its spatial position parameter, and sends it to the designated channel.

The above-mentioned spatial location parameters are expressions of geographic space. The specific expression methods can be selected from vector expression method, raster expression method, etc., including related geographic space matching algorithms, which belong to known technologies and are not within the scope of this application. .

Further, referring to Figure 5, Figure 5 is a schematic diagram of the system configuration of the location-oriented service-oriented IoT application system described in this application, and the system includes the following components:

GBAS (ground-based augmentation systems, ground-based augmentation systems) reference station, real-time observation of GNSS (Global Navigation Satellite System) signals, generating differential data and sending it;

The IoT base station provides two-way communication capabilities between the location service cloud platform and the IoT terminal;

The digital broadcasting base station receives data (such as differential data) pushed by the cloud platform, modulates it into a digital broadcasting signal and transmits it, and has a fixed installation location and signal coverage area;

Internet of Things terminal, access to digital broadcasting base station and Internet of Things base station signals to achieve high-precision positioning, built-in processor with certain general computing capabilities;

The data broadcast cloud platform builds a publishing and subscription channel between the location service cloud platform and the digital broadcasting base station, realizes a routing mechanism based on location information, and assigns the location service information frame (see below) released by the location service cloud platform to the corresponding number Broadcast base station

The location service cloud platform provides users with location service functions, such as receiving differential data from GBAS reference stations and publishing to the data broadcasting cloud platform; for example, receiving user location service requests, generating RPC parameters for edge computing and publishing to the data broadcasting cloud Platform; for example, it receives the data information uploaded by the IoT terminal and calculates the location service result and feeds it back to the user.

Referring to Figure 6, Figure 6 is a schematic diagram of the hardware structure of an embodiment of a digital broadcasting base station, including the following modules:

Network interface module, docking with the data broadcasting cloud platform, receiving location service information frame data and writing it into the storage module;

The broadcast data storage module is used to store the location service information frame data to be broadcast and other operating data of the digital broadcast base station;

Broadcast signal modulation module, which modulates location service information frame data and other necessary information such as pilots and modulation parameters into baseband signals for digital broadcasting;

Broadcast signal transmission module, including digital-to-analog converter, mixer, power amplifier, filter, etc., generates digital broadcast radio frequency signal, amplifies and reshapes it, and then broadcasts it by the transmitting antenna;

The timing module receives signals from GNSS satellites such as Beidou and GPS to generate timing signals, which are used to control the broadcast signal transmission module to realize the simultaneous broadcast of broadcast signals from multiple digital broadcast base stations;

The monitoring module is used to monitor the operating parameters of the digital broadcasting base station, such as location, temperature, transmission power and other information, and feedback to the data broadcasting cloud platform through the network interface module.

Referring to FIG. 7, FIG. 7 is a schematic diagram of the hardware structure of an embodiment of the Internet of Things terminal, including the following modules:

The MCU microprocessor (Microcontroller Unit) connects and manages other modules through a series of physical interfaces, records positioning information and various environmental information input by external sensors, receives location service RPC calculation requests and performs calculations through the CDRadio module, and performs calculations through NB- IoT module (narrowband IoT module) provides collected data and RPC calculation results to the cloud platform;

GNSS positioning module, which receives GNSS satellite signals to generate positioning results, and can input differential data to achieve RTD (Real Time Differential) or RTK (Real-time kinematic, real-time dynamic carrier phase differential technology) high-precision positioning Function to provide accurate position coordinates and timing information to the MCU microprocessor;

CDRadio (digital audio broadcasting module) receiving module, based on the narrowband digital broadcasting CDRadio receiving chip SK9042, can automatically search for and access CDRadio broadcasting signals, obtain broadcasting station identification and broadcasting service data, and provide them to MCU microprocessor;

The NB-IoT communication module connects to the cloud platform through a low-power wide area network, and mainly uses its upload function to return various data information to the cloud platform;

The power management module provides power supply support and low-power management functions for IoT terminals.

Refer to Figure 8. Figure 8 is a functional module diagram of the data broadcasting cloud platform, including the following modules:

Input management module, implement network interface protocol (such as Restful API), provide input interface of location service information frame to third-party cloud platform or network user, and write current location service information frame according to real-time parameters in location service information frame Enter the high priority input queue buffer or the low priority input queue buffer;

High-priority input queue buffer to store location service information frame data of real-time application services;

Low priority input queue buffer to store location service information frame data for non-real-time application services;

Priority scheduling module, which can be configured with multiple scheduling methods such as absolute priority, regular polling, weight distribution, etc., to query the high-priority input queue buffer first, while avoiding the blocking of the low-priority input queue buffer, and extract location service information from it Frame, transferred to the matching calculation module for processing;

The matching calculation module performs matching calculation with the known digital broadcast base station signal coverage area according to the spatial location parameters in the location service information frame, thereby obtaining the mapping relationship between the current location service information frame and the digital broadcast base station;

The output queue buffer stores all the location service information frame data waiting to be sent to the broadcasting station;

The output management module extracts the location service information frame from the output queue buffer, and sends the location service information frame to the corresponding digital broadcast base station according to the digital broadcast base station mapping information therein.

The data broadcasting cloud platform creates a publishing and subscription channel for digital broadcasting base stations to facilitate the push of IoT location service data. It uses a location-based routing mechanism internally to allocate location service information frames to the corresponding digital broadcast base station for broadcast. The location service cloud platform uses the network interface provided by the data dissemination cloud platform to call its published and subscribed channels to push location service information frames to IoT terminals in a specific area to realize rich location service applications.

The specific workflow of the location service cloud platform for publishing location service information frames through the data broadcasting cloud platform is as follows:

1. The Internet of Things terminal searches for and receives CDRadio digital broadcast signals, obtains the broadcast station identifier, and then sends the location service subscription information corresponding to the broadcast station identifier to the location service cloud platform through the NB-IoT uplink channel;

2. The location service cloud platform generates a channel subscription table based on the subscription information of the IoT terminal and sends it to the data broadcasting cloud platform;

3. The location service cloud platform responds to the location service request of the third-party user, generates a location service information frame and publishes it to the data broadcasting cloud platform;

4. The data broadcasting cloud platform receives the location service information frame issued by the location service cloud platform, extracts the real-time parameters therein, and then distinguishes real-time applications or non-real-time applications according to the value of the real-time parameters, and puts the location service information frames into high priority Level input queue buffer or low priority input queue buffer;

5. The data broadcast cloud platform selects absolute priority, timed polling or weight distribution scheduling algorithms according to the predetermined configuration, and extracts location service information frames from the high priority input queue buffer or low priority input queue buffer for processing;

6. The data broadcast cloud platform extracts the spatial location parameters of the location service information frame, and performs matching calculations with the spatial location information of the digital broadcast base station to obtain the correspondence between the location service information frame and the digital broadcast base station, that is, the channel mapping table;

7. The data broadcast cloud platform uses the channel subscription table to check the channel mapping table, remove unsubscribed channels, and then update the channel subscription table of the location service information frame;

8. The channel subscription table of the current location service information frame of the data broadcasting cloud platform is sent to the corresponding digital broadcasting base station.

Refer to FIG. 9, which is a schematic diagram of the data format of the location service information frame.

Start word and end word: respectively indicate the start and end of a location service information frame, use the ASCII code 0x23 corresponding to the character "#" to indicate the start word, and use the ASCII code 0x04 corresponding to the transmission end character EOT to indicate the end word;

Control word: use different bit values to indicate whether there is a check word in the current location service information frame, whether it is returned data, etc.;

Service type: indicates the type of location service to which the current location service information frame belongs, such as location service RPC, high-precision differential data, etc.;

Broadcast parameters: used for data broadcast cloud platform for routing processing, composed of real-time parameters, spatial location parameters, and channel mapping table, see the following table:

parameter name	meaning
Real-time parameters	Describe whether the current frame is a real-time application or a non-real-time application
Spatial location parameter	Describe the geographic space applicable to the current frame
Number of channels M	Describe the number of publish and subscribe channels to be distributed in the current frame, each channel corresponds to a digital broadcast base station
for i=1:M { Channel ID }	To To Publish and subscribe channel (ie digital broadcasting base station) number

The content length indicates the length of the content data in bytes. When the value is 0, it means that there is no content data in the current location service information frame;

The content data, the specific format is defined by the location service cloud platform, for example, when the service type is indicated as "location service RPC", the content data is composed of RPC parameters;

The check word uses the CRC32 check algorithm, and the check range is from the control word to one byte before the check word. It should be noted that the above figure is only an example. For those skilled in the art, referring to the content shown in the above figure, part or all of the information can be easily added, removed, or replaced to achieve the location service information frame shown in the figure. The role of.

In addition, an embodiment of the present application also proposes an Internet of Things broadcasting device, the Internet of Things broadcasting device is applied to a broadcasting station, and the Internet of Things broadcasting device includes:

The sending module is used to send service channel signals to terminals in the preset area in the form of digital broadcasting;

The determining module is configured to obtain the service subscription request fed back by the terminal based on the service channel signal, and determine the target subscription service according to the service subscription request;

A sending module, used to send the target subscription service to a network service program;

The broadcasting module is configured to send the target service content to the terminal in the preset area in the form of digital broadcasting if the target service content fed back by the network service program based on the target subscription service is received.

In an embodiment, the determining module includes:

The obtaining unit is configured to obtain all service subscription requests fed back by each terminal based on different service channel signals, and determine the service subscription table of the corresponding terminal according to each service subscription request;

The first determining unit is configured to determine the channel subscription table of the broadcasting station according to the service subscription table, and determine the target subscription service of the broadcasting station according to the channel subscription table.

In an embodiment, the broadcasting module includes:

A receiving unit, configured to receive the target service content fed back by the network service program based on the target subscription service, and obtain the local location parameter of the broadcasting station;

A parsing unit, configured to analyze the local target service content in the target service content according to the local location parameter;

The first sending unit is configured to send the local target service content to the terminal in the preset area in the form of digital broadcasting.

In an embodiment, the service subscription request includes a first fuzzy location parameter, and the determining module includes:

The second determining unit is configured to determine the target subscription service according to the service subscription request and the first fuzzy location parameter, and the target service content that the broadcast station receives based on the target subscription service feedback includes the second fuzzy location parameter;

The broadcasting module includes:

The fuzzy unit is configured to determine the fuzzy area in the preset area according to the second fuzzy position parameter, and send the target service content to the terminal in the fuzzy area in the form of digital broadcasting.

In an embodiment, the determining module further includes:

The first detection unit is configured to obtain a service subscription request fed back by the terminal based on the service channel signal, and detect whether there is a remote call request in the service subscription request;

The first determining unit is configured to, if yes, obtain the remote call parameters in the service subscription request, send the remote call parameters and the service subscription request to the network service program, and obtain the network service program based on all The remote invocation parameters and the remote service content fed back in the form of digital broadcast of the service subscription request;

The second judgment unit is configured to, if not, execute the function of determining the target subscription service according to the service subscription request.

In an embodiment, the target service content includes real-time parameters, and the broadcast module includes:

The second detection unit is configured to receive the target service content fed back by the network service program based on the target subscription service, and detect whether the target service content has real-time parameters;

The first priority unit is configured to, if yes, push the target service content to the first priority queue;

The second priority unit is configured to, if not, push the target service content to the second priority queue;

The second sending unit is configured to send the target service content to the terminals in the preset area in the form of digital broadcast in sequence according to the first priority queue and the second priority queue.

In an embodiment, the service channel signal includes a channel name, and the channel name serves as an anonymous name for each terminal service subscription request.

In addition, an embodiment of the present application also proposes a broadcasting station. The broadcasting station includes a memory 109, a processor 110, and an Internet of Things broadcasting program stored on the memory 109 and running on the processor 110. The Internet of Things broadcasting program is The processor 110 implements the steps of the foregoing embodiments of the Internet of Things broadcasting method when executed.

In addition, the present application also provides a computer storage medium that stores an Internet of Things broadcasting program, and the Internet of Things broadcasting program can also be executed by a processor to implement the implementation of each embodiment of the Internet of Things broadcasting method. step.

The expanded content of the specific implementation of the broadcasting station and storage medium (ie, computer storage medium) of this application is basically the same as each embodiment of the above-mentioned Internet of Things broadcasting method, and will not be repeated here.

It should be noted that in this article, the terms "include", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, It also includes other elements not explicitly listed, or elements inherent to the process, method, article, or device. If there are no more restrictions, the element defined by the sentence "including a..." does not exclude the existence of other identical elements in the process, method, article or device that includes the element.

The serial numbers of the foregoing embodiments of the present application are only for description, and do not represent the advantages and disadvantages of the embodiments.

Through the description of the above embodiments, those skilled in the art can clearly understand that the method of the above embodiments can be implemented by means of software plus the necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases the former is better.的实施方式。 Based on this understanding, the technical solution of this application essentially or the part that contributes to the existing technology can be embodied in the form of a software product, and the computer software product is stored in a storage medium (such as ROM/RAM) as described above. , Magnetic disk, optical disk), including several instructions to make an Internet of Things broadcasting device (can be a mobile phone, computer, server, air conditioner, or network device, etc.) execute the method described in each embodiment of this application.

The embodiments of the present application are described above with reference to the accompanying drawings, but the present application is not limited to the above-mentioned specific embodiments. The above-mentioned specific embodiments are only illustrative and not restrictive. Those of ordinary skill in the art are Under the enlightenment of this application, many forms can be made without departing from the purpose of this application and the scope of protection of the claims, and these are all within the protection of this application.

Claims (10)

1. An Internet of Things broadcasting method, wherein the Internet of Things broadcasting method is applied to a broadcasting station, and the Internet of Things broadcasting method includes:

   The broadcasting station sends service channel signals to terminals in the preset area in the form of digital broadcasting;

   The broadcasting station obtains the service subscription request fed back by the terminal based on the service channel signal, and determines the target subscription service according to the service subscription request;

   The broadcasting station sends the target subscription service to the network service program;

   If the broadcasting station receives the target service content fed back by the network service program based on the target subscription service, it sends the target service content to the terminals in the preset area in the form of digital broadcasting.
2. The Internet of Things broadcasting method according to claim 1, wherein the step of the broadcasting station obtaining the service subscription request fed back by the terminal based on the service channel signal, and determining the target subscription service according to the service subscription request comprises:

   The broadcasting station separately obtains all service subscription requests fed back by each terminal based on different service channel signals, and determines the service subscription table of the corresponding terminal according to each service subscription request;

   Determine the channel subscription table of the broadcasting station according to the service subscription table, and determine the target subscription service of the broadcasting station according to the channel subscription table.
3. The Internet of Things broadcasting method according to claim 1, wherein if the broadcasting station receives the target service content fed back by the network service program based on the target subscription service, the broadcasting station will broadcast to the preset area in the form of digital broadcasting. The step of sending the target service content by the terminal includes:

   The broadcasting station receives the target service content fed back by the network service program based on the target subscription service, and obtains the local location parameter of the broadcasting station;

   The broadcasting station analyzes the local target service content in the target service content according to the local location parameter;

   The broadcasting station transmits the local target service content to the terminals in the preset area in the form of digital broadcasting.
4. The Internet of Things broadcasting method according to claim 3, wherein the service subscription request includes a first fuzzy location parameter,

   The step of determining a target subscription service according to the service subscription request includes:

   The broadcasting station determines the target subscription service according to the service subscription request and the first fuzzy location parameter, and the target service content that the broadcasting station receives based on the target subscription service feedback includes the second fuzzy location parameter;

   The step of sending the target service content to terminals in the preset area in the form of digital broadcasting includes:

   The fuzzy area in the preset area is determined according to the second fuzzy position parameter, and the target service content is sent to the terminal in the fuzzy area in the form of digital broadcasting.
5. The Internet of Things broadcasting method according to claim 1, wherein the step of obtaining the service subscription request fed back by the terminal based on the service channel signal by the broadcasting station and determining the target subscription service according to the service subscription request further comprises:

   The broadcasting station obtains the service subscription request fed back by the terminal based on the service channel signal, and detects whether the service subscription request has a remote invocation request;

   If so, obtain the remote call parameters in the service subscription request, send the remote call parameters and the service subscription request to the network service program, and obtain the network service program based on the remote call parameters and the Service subscription requests remote service content fed back in the form of digital broadcasting;

   If not, execute the step of determining the target subscription service according to the service subscription request.
6. The Internet of Things broadcasting method according to claim 1, wherein the target service content includes real-time parameters,

   If the broadcasting station receives the target service content fed back by the network service program based on the target subscription service, the step of transmitting the target service content to the terminals in the preset area in the form of digital broadcasting includes:

   The broadcasting station receives the target service content fed back by the network service program based on the target subscription service, and detects whether the target service content has real-time parameters;

   If yes, push the target service content to the first priority queue;

   If not, push the target service content to the second priority queue;

   The broadcasting station sends the target service content to the terminals in the preset area in the form of digital broadcasting in sequence according to the first priority queue and the second priority queue.
7. The Internet of Things broadcasting method according to any one of claims 1-6, wherein the service channel signal includes a channel name, and the channel name serves as an anonymous name for each terminal service subscription request.
8. An Internet of Things broadcasting device, wherein the Internet of Things broadcasting device is applied to a broadcasting station, and the Internet of Things broadcasting device includes:

   The sending module is used to send service channel signals to terminals in the preset area in the form of digital broadcasting;

   The determining module is configured to obtain the service subscription request fed back by the terminal based on the service channel signal, and determine the target subscription service according to the service subscription request;

   A sending module, used to send the target subscription service to a network service program;

   The broadcasting module is configured to send the target service content to the terminal in the preset area in the form of digital broadcasting if the target service content fed back by the network service program based on the target subscription service is received.
9. A broadcasting station, wherein the broadcasting station includes: a memory, a processor, and an Internet of Things broadcasting program stored on the memory and running on the processor; when the Internet of Things broadcasting program is executed by the processor The steps of implementing the Internet of Things broadcasting method according to any one of claims 1 to 7.
10. A storage medium, wherein an Internet of Things broadcasting program is stored on the storage medium, and the Internet of Things broadcasting program is executed by a processor to realize the steps of the Internet of Things broadcasting method according to any one of claims 1 to 7 .