CN110460958B - Internet of things broadcasting method, device, broadcasting station and storage medium - Google Patents

Abstract

The present invention discloses an Internet of Things broadcasting method, device, broadcasting station and storage medium. The Internet of Things broadcasting method is applied to a broadcasting station, and the Internet of Things broadcasting method includes: the broadcasting station sends a service channel signal to a terminal in a preset area in the form of digital broadcasting; the broadcasting station obtains a service subscription request from the terminal based on the service channel signal feedback, and determines a target subscription service according to the service subscription request; the broadcasting station sends the target subscription service to a 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, the target service content is sent to the terminal in the preset area in the form of digital broadcasting. The present invention solves the technical problem that the Internet of Things terminal device cannot obtain an effective location service function in the communication network of an existing base station.

Description

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

Technical Field

The present invention relates to the field of Internet of Things application technology, and in particular to an Internet of Things broadcasting method, device, broadcasting station and storage medium.

Background Art

At present, existing positioning terminals all achieve precise positioning by obtaining differential data through mobile networks. However, the high-density connection characteristics of IoT application systems make 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 high-precision positioning of terminal devices, thereby degrading positioning accuracy and making it impossible for base stations to provide corresponding location service functions based on the location of terminal devices, reducing the effectiveness and practicality of location service functions.

Summary of the invention

The main purpose of the present invention 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 devices cannot obtain effective location service functions in the communication network of existing base stations.

To achieve the above object, an embodiment of the present invention provides an Internet of Things broadcasting method, which is applied to a broadcasting station and includes:

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

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

The broadcast station sends 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, the broadcast station sends the target service content to the terminals in the preset area in the form of digital broadcasting.

Optionally, the step of the broadcast station acquiring a service subscription request fed back by the terminal based on the service channel signal, and determining a target subscription service according to the service subscription request includes:

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

A channel subscription table of the broadcasting station is determined according to the service subscription table, and a target subscription service of the broadcasting station is determined according to the channel subscription table.

Optionally, if the broadcast 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 terminals in the preset area in the form of digital broadcasting includes:

The broadcast 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 broadcast station;

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

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

Optionally, the service subscription request includes a first fuzzy location parameter,

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

The broadcast station determines a target subscription service according to the service subscription request and the first fuzzy position parameter, wherein the target service content received by the broadcast station based on the target subscription service feedback includes a second fuzzy position parameter;

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

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

Optionally, the step of the broadcast station acquiring a service subscription request fed back by the terminal based on the service channel signal, and determining a target subscription service according to the service subscription request further includes:

The broadcast station obtains the service subscription request fed back by the terminal based on the service channel signal, and detects whether there is a remote call request in the service subscription request;

If so, obtaining the remote call parameters in the service subscription request, and sending the remote call parameters and the service subscription request to the network service program, and obtaining the remote service content fed back by the network service program in the form of digital broadcast based on the remote call parameters and the service subscription request;

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

Optionally, the target service content includes real-time parameters,

If the broadcast 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 terminals in the preset area in the form of digital broadcasting comprises:

The broadcast 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 a real-time parameter;

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

If not, pushing 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.

Optionally, the service channel signal includes a channel name, and the channel name serves as a hidden pseudonym for each terminal service subscription request.

The present invention also provides an Internet of Things broadcasting device, which is applied to a broadcasting station and includes:

A sending module, used for sending a service channel signal to terminals in a preset area in the form of digital broadcast;

A determination module, configured to obtain a service subscription request fed back by the terminal based on the service channel signal, and determine a target subscription service according to the service subscription request;

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

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

Optionally, the determining module includes:

An acquisition unit, configured to respectively acquire all service subscription requests fed back by each terminal based on signals of different service channels, and determine a service subscription table of the corresponding terminal according to each service subscription request;

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

Optionally, the broadcast 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 broadcast station;

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

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

Optionally, the service subscription request includes a first fuzzy location parameter, and the determining module includes:

A second determining unit is configured to determine a target subscription service according to the service subscription request and the first fuzzy position parameter, wherein the target service content received by the broadcast station based on the target subscription service feedback includes the second fuzzy position parameter;

The broadcast module comprises:

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

Optionally, the determining module further includes:

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

A first judgment unit is configured to obtain a remote call parameter in the service subscription request, send the remote call parameter and the service subscription request to the network service program, and obtain the remote service content fed back by the network service program in the form of digital broadcast based on the remote call parameter and the service subscription request;

The second judgment unit is used to execute the function of determining the target subscription service according to the service subscription request if no.

Optionally, the target service content includes a real-time parameter, and the broadcast module includes:

A second detection unit is used 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 a real-time parameter;

A first priority unit, configured to push the target service content to a first priority queue if yes;

a second priority unit, configured to push the target service content to a second priority queue if no;

The second sending unit is used to send 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.

Optionally, the service channel signal includes a channel name, and the channel name serves as a hidden pseudonym for each terminal service subscription request.

In addition, to achieve the above-mentioned purpose, the present invention further provides a broadcasting station, the broadcasting station comprising: a memory, a processor, and an Internet of Things broadcasting program stored in the memory and executable 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, to achieve the above-mentioned purpose, the present invention 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 the processor, the steps of the Internet of Things broadcasting method as described above are implemented.

The broadcast station of the present invention sends a service channel signal to a terminal in a preset area in the form of digital broadcasting; the broadcast station obtains a service subscription request from the terminal based on the service channel signal feedback, and determines a target subscription service according to the service subscription request; the broadcast station sends the target subscription service to a network service program; if the broadcast station receives the target service content from the network service program based on the target subscription service feedback, the target service content is sent to the terminal in the preset area in the form of digital broadcasting. The present invention optimizes the positioning accuracy, so that the broadcast station can provide corresponding location service functions based on the location of the terminal device, improve the effectiveness and practicality of the location service function, and solve the technical problem that the Internet of Things terminal device cannot obtain effective location service functions in the communication network of the existing base station.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of a device structure of a hardware operating environment involved in an embodiment of the present invention;

FIG2 is a schematic diagram of a flow chart of an embodiment of an Internet of Things broadcasting method according to the present invention;

FIG3 is a schematic diagram of a service subscription table and a channel subscription table in the Internet of Things broadcasting method of the present invention;

4 is a schematic diagram of the design of data distribution routing of target service content within a broadcast station according to the present invention;

FIG5 is a schematic diagram of the system structure of the location-based service-oriented Internet of Things system of the present invention;

FIG6 is a schematic diagram of the hardware structure of a digital broadcasting base station according to an embodiment of the present invention;

FIG7 is a schematic diagram of the hardware structure of an Internet of Things terminal according to an embodiment of the present invention;

FIG8 is a functional module diagram of the data broadcasting cloud platform of the present invention;

FIG. 9 is a schematic diagram of the data format of the location service information frame of the present invention.

The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments.

DETAILED DESCRIPTION

It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

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

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

As shown in Figure 1, the broadcast 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 realize the connection and communication between these components. The user interface 1003 may include a display screen (Display), 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 disk memory. The memory 1005 may also be a storage device independent of the aforementioned processor 1001.

Those skilled in the art will appreciate that the device structure shown in FIG. 1 does not constitute a limitation on the device, and may include more or fewer components than shown, or a combination of certain components, or a different arrangement of components.

As shown in FIG. 1 , the 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 broadcasting program.

In the device shown in Figure 1, the network interface 1004 is mainly used to connect to the background server and communicate data with the background server; the user interface 1003 is mainly used to connect to the client (user end) and communicate data with the client; and the processor 1001 can be used to call the Internet of Things broadcast program stored in the memory 1005, and perform the operations in each embodiment of the following Internet of Things broadcast method.

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

The emergence of a large number of IoT applications has greatly enriched people's means of obtaining information and promoted the informatization and intelligence of a series of applications such as environmental monitoring, traffic management, logistics management, smart grids, etc. These new application services need to process a large amount of real-time information obtained from external sensors, and 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 time-space related environmental attributes, such as surrounding light, temperature, humidity, movement of objects, etc., so that the application service can respond to the "situation" or "event" that needs attention in a timely manner. This makes location-based services (LBS) one of the most promising applications in the field of IoT. Most public services and commercial applications based on IoT rely on the location information of the terminal. Many perception data are meaningful only when the accurate location information of the terminal is determined. Accurate terminal positioning plays an increasingly important role in IoT location service applications.

The rapid development of IoT location service applications has provided convenience for users, but it has also exposed some problems of existing IoT technologies:

1. IoT technology itself lacks accurate positioning capabilities;

2. Transmitting differential data will occupy a large amount of downlink bandwidth, making it difficult to meet real-time requirements;

3. Lack of regional fuzzy query capability, making it difficult to identify numerous terminals in a specific area;

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

5. Multi-terminal batch interactive operations have low real-time performance and are limited to specific situations.

The present invention uses digital broadcasting to solve the above problems, especially narrowband wide-area digital broadcasting technology, such as CDRadio, CDR, and DRM, which also has some key features of LPWAN technology: low power consumption, wide-area coverage, and high-density connection. Especially in terms of connection density, the broadcast technology system can theoretically support unlimited terminal connections, which is particularly in line with the development direction of the Internet of Things MMTC (Massive machine-type-communications).

Using digital broadcasting technology (such as CDRadio) to broadcast differential data to the underlying network terminals of the Internet of Things can help the terminals implement differential positioning technology, so that the new Internet of Things architecture has accurate positioning capabilities. At the same time, it also avoids the time correlation and spatial correlation problems of differential data transmission. First, the transmission delay of digital broadcasting is fixed and is not affected by the number of terminal connections. The real-time performance 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 solved, because the problem of "what objects are in the specified area" has become the problem of "where the specified object (differential data valid area) is (broadcast base station signal coverage area)".

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

Because broadcast technology naturally has the characteristics of fixed signal transmission delay and unlimited connection. Through digital broadcast channels, the homogeneous control data for multiple terminals (such as traffic light control in a certain urban area) can be sent down, which can well solve the real-time and synchronization problems of many terminal operations, and is particularly suitable for IoT applications that require batch real-time control.

The present invention provides an Internet of Things broadcasting method, which is mainly applied to a broadcasting station. 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 terminals in a preset area in the form of digital broadcasting;

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

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

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

The specific contents are as follows:

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

The new IoT architecture adds digital broadcasting to the underlying network of the IoT system, obtaining a low-latency, spatially-related downlink channel. To facilitate the distribution of data content, a publish-subscribe design pattern can be adopted at the network service software level, creating each broadcast station as a downlink publish-subscribe channel, forming a distributed publish-subscribe coverage network based on spatial location information, and providing an operating environment based on regional location (broadcast station signal coverage area) for IoT services. The architecture of the publish-subscribe system is shown in the figure below.

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

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

In the present invention, the broadcasting station sends a service channel signal in the form of digital broadcasting to the terminals in the preset area within the coverage of the broadcasting station. The service channel signal includes a channel name, which is used as an anonymous name for each terminal service subscription request.

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

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

Specifically, the broadcast 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, including:

Step A1, the broadcast station obtains all service subscription requests fed back by each terminal based on signals of different service channels, and determines a service subscription table of the corresponding terminal according to each service subscription request;

Step A2: determining the channel subscription table of the broadcast station according to the service subscription table, and determining the target subscription service of the broadcast station according to the channel subscription table.

It is understandable that there can be multiple service channel signals sent by the broadcast station for different terminals to choose from. 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 channel _Bi ; and the broadcast station generates a service subscription table CT (i.e., a terminal-service subscription table CT formed by the services subscribed by different terminals) based on the subscription information of all terminals, and calculates the subscription table BT for publishing and subscribing channels.

Referring to Figure 3, C in the service subscription table CT represents the terminal identifier, T represents the service, and the value 1 indicates that the terminal corresponding to the column has subscribed to the service corresponding to the row, and 0 indicates that it has not subscribed. The subscription table CT in the above figure expresses the subscription of m services of 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 _Bi needs to subscribe to the service, and the i-th column and j-th row of the channel subscription table BT needs 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 concurrency of MMTC. It can be seen from the channel subscription table that all target subscription services that the current broadcast station needs to subscribe to.

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

Step B1, the broadcast station obtains a service subscription request fed back by the terminal based on the service channel signal, and detects whether the service subscription request has a remote call 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 remote service content fed back by the network service program in the form of digital broadcast based on the remote call parameters and the service subscription request;

Step B3: If not, execute 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, the present invention proposes a remotely called location service mechanism, which transfers the calculation task 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 (such as billing information) without exposing 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 IoT terminal implements an RPC (Remote Procedure Call) service. 1. The broadcast station obtains a service subscription request and detects the request to determine whether there is a remote call request. If yes, then obtain the remote call parameter, and send the remote call parameter and service subscription request directly to the network service program; 2. The network service program extracts the process in the service that requires the precise location information of the terminal to participate in the calculation, and uses the execution program of this calculation process and other necessary input parameters as the parameters of the RPC function; 3. Determine the publish-subscribe channel corresponding to the terminal through the anonymous location of the terminal (i.e., channel ID), and the network service program, as the publisher, pushes the RPC parameters as service content to the publish-subscribe channel; 4. The broadcasting station broadcasts these service contents (i.e., RPC parameters) to the target terminal within the signal coverage area based on the publish-subscribe channel; 5. After receiving the RPC parameters, the terminal obtains the execution program and input parameters of the calculation process, and then inputs its own precise location data as a parameter 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, and the RPC task is completed; 7. After receiving the RPC result, the network service program continues to execute other calculation processes of the location service and returns the final result to the user.

Specifically, we use the subscription to weather forecast as an example. The terminal subscribes to the weather forecast service, and the broadcast station determines the celestial forecast service content. However, due to the existence of the RPC remote call parameters, the specific terminal location is not obtained. Instead, the RPC remote call parameters and the service subscription request are sent to the network service program. After the network service program configures the corresponding weather forecast content, it returns to the broadcast station, thereby directly obtaining the weather forecast information. In this process, the broadcast station, as an information intermediary, only performs the role of a medium for information transmission.

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

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

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 channel (broadcast station) that has subscribed to the service according to the target service content in the target subscription service and the subscription status of the channel subscription table BT;

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

Specifically, if the broadcast 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 broadcast 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 broadcast station;

Step C2, the broadcasting station parses the local target service content in the target service content according to the local location parameter;

Step C3: the broadcasting station sends 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 screening on the target service content. Many target service contents naturally have location attributes, such as weather forecast, real-time traffic conditions, differential data, street light control, etc. Taking weather forecast as an example, a terminal that has subscribed to the service content usually only needs to receive weather information for its own location, not all of it. When the broadcasting station routing engine publishes data content in the weather forecast service, it will allocate it to a specific publishing and subscription channel (broadcasting station) according to the local location parameters of the broadcasting station (such as the city where it is located), so that the terminals within the signal coverage area of the broadcasting station can obtain local weather information. Similarly, spatial location parameters such as the effective area of differential data (for example, within a 50-kilometer radius around the base station) and the target area of street light control (for example, a certain urban area) can be used as calculation parameters of the routing engine.

Therefore, the routing engine in the present invention adopts a location-based routing mechanism, which divides the target service content according to the local location parameters, and the broadcast station pushes these target service content data to all subscribers (IoT terminals) within the signal coverage area.

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

The broadcast station determines a target subscription service according to the service subscription request and the first fuzzy position parameter; the target service content received by the broadcast station based on the feedback of the target subscription service includes a second fuzzy position parameter;

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

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

The first fuzzy location parameter is the terminal fuzzy location parameter in the service subscription request. After the broadcast station obtains the target subscription service based on the service subscription request and the first fuzzy location parameter, and sends the target subscription service to the network service program, the target service content fed back includes the second fuzzy location parameter. The first fuzzy location parameter and the second fuzzy location parameter are basically the same, and can be more accurate or fuzzy according to the correction of the network service program. The fuzzy area within the preset area can be determined according to the second fuzzy location parameter, that is, the fuzzy area is slightly smaller than the preset area, but it is still not accurate. The broadcast station sends the target service content to the terminal in the fuzzy area in the form of digital broadcasting.

The broadcast station obtains the first fuzzy location parameter in the service subscription request from the terminal, that is, the broadcast station does not obtain the precise location information of the terminal, but obtains a fuzzy parameter. The first fuzzy location parameter contains a larger range of regional information, thereby hiding the real location of the terminal that cannot be obtained. At this time, the terminal provides the real identity, but the location information is fuzzy. This fuzzification method is relatively flexible and controllable, without obvious defects. The target subscription service can be determined based on the terminal fuzzy location parameter 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 to 50 kilometers. As long as the numerous terminals in the signal coverage area receive the broadcast signal, they can use the identifier (channel ID) corresponding to the broadcasting station they are connected to as their own location anonymity. The location anonymity corresponds to the signal coverage area of this broadcasting station, thereby 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 regional fuzzy query, but cannot query the precise location of the terminal, which significantly reduces the risk of location privacy exposure.

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

The broadcast station of the present invention sends a service channel signal to a terminal in a preset area in the form of digital broadcasting; the broadcast station obtains a service subscription request from the terminal based on the service channel signal feedback, and determines a target subscription service according to the service subscription request; the broadcast station sends the target subscription service to a network service program; if the broadcast station receives the target service content from the network service program based on the target subscription service feedback, the target service content is sent to the terminal in the preset area in the form of digital broadcasting. The present invention optimizes the positioning accuracy, so that the broadcast station can provide corresponding location service functions based on the location of the terminal device, improve the effectiveness and practicality of the location service function, and solve the technical problem that the Internet of Things terminal device cannot obtain effective location service functions in the communication network of the existing base station.

Further, based on the first embodiment, a second embodiment of the present method is proposed. In this embodiment, if the broadcast 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 D1, the broadcast 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 a real-time parameter;

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

Step D3, if not, pushing 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 broadcast station receives the target service content and detects whether there is a real-time parameter 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, etc. After the priority is determined, the broadcast station can distribute the data and broadcast from the first priority queue with the highest priority. After the target service content of the first priority queue is distributed, the target service content of the second priority queue will be distributed.

Referring to FIG. 4 , FIG. 4 is a data distribution routing mechanism for target service content within a broadcast station, which is implemented through a built-in routing engine:

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

2. The input management module receives the service content, selects the target input queue cache according to the real-time parameter, puts the real-time application service (such as differential data) content into the first priority queue, and puts the non-real-time application or the content without real-time parameter into the low priority queue (the present invention only describes the high and low priorities, and more priorities can be set as needed in the actual system);

3. The priority scheduling engine can select multiple algorithms such as absolute priority, timed polling, and weight allocation, and try to process the first priority queue first while avoiding the blocking problem of the second priority queue. It can schedule multiple priority queues, extract service content from them, 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 calculation with the spatial location parameters of the publish-subscribe channel (broadcast station), finds the target publish-subscribe channel to be sent, records the identifiers of these channels, and obtains the channel ID array G _prep ;

5. The matching calculation engine extracts the column number (channel ID) with a value of 0 in the row where the current service is located according to the subscription status of the subscription table BT record to obtain the array G _idle , and then deletes the repeated parts of the two array elements G _prep and G _idle from G _prep to obtain G _dest ;

6. The matching calculation engine adds the array G _dest to the spatial location parameter of the service content and then writes it into 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 then sends it to the specified channel.

The spatial position parameters mentioned above are expressions of geographic space. Specific expressions include vector expression, raster expression, etc., which can be selected. Related geographic space matching algorithms are all known technologies and are not within the scope of the present invention.

Further, referring to FIG. 5 , FIG. 5 is a schematic diagram of the system structure of the location-based service-oriented Internet of Things application system of the present invention, and the system includes the following components:

GBAS (ground-based augmentation systems) base station observes GNSS (global navigation satellite system) signals in real time, generates differential data and sends it out;

IoT base station, providing two-way communication capabilities between the location service cloud platform and IoT terminals;

Digital broadcasting base stations receive data pushed by the cloud platform (e.g., differential data), modulate it into digital broadcasting signals, and transmit them. They have fixed installation locations and signal coverage areas.

IoT terminals access digital broadcast base station and IoT base station signals to achieve high-precision positioning, and the built-in processor has certain general computing capabilities;

The data broadcast cloud platform builds a publish-subscribe channel between the location service cloud platform and the digital broadcast base station, implements a routing mechanism based on location information, and distributes the location service information frames (see below) published by the location service cloud platform to the corresponding digital broadcast base station;

The location service cloud platform provides users with location service functions, such as receiving differential data from GBAS base stations and publishing it to the data broadcast cloud platform; for example, receiving users' location service requests, generating RPC parameters for edge computing and publishing them to the data broadcast cloud platform; for example, receiving data information uploaded by IoT terminals and calculating location service results and feeding them back to users.

6, FIG6 is a schematic diagram of the hardware structure of an embodiment of a digital broadcast base station, including the following modules:

The network interface module is connected to the data broadcast cloud platform, receives the location service information frame data and writes it into the storage module;

A broadcast data storage module, used to store location service information frame data to be broadcast, and other operation data of the digital broadcast base station;

The broadcast signal modulation module modulates the location service information frame data and other necessary information such as pilot and modulation parameters into a baseband signal for digital broadcasting;

The broadcast signal transmission module, including digital-to-analog conversion, mixer, power amplifier, filter, etc., generates the RF signal of digital broadcast and amplifies and shapes it before it is broadcasted by the transmitting antenna;

The timing module receives GNSS satellite signals such as Beidou and GPS, generates timing signals, and is used to control the broadcast signal transmission module to achieve synchronous broadcasting 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 feed back 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 an 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 through the CDRadio module and performs calculations, and provides collected data and RPC calculation results to the cloud platform through the NB-IoT module (narrowband Internet of Things module);

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

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

The NB-IoT communication module accesses 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 consumption management functions for IoT terminals.

Referring to FIG8 , FIG8 is a functional module diagram of the data broadcast cloud platform, including the following modules:

The input management module implements the network interface protocol (such as Restful API), provides the input interface of the location service information frame to the third-party cloud platform or network users, and writes the current location service information frame into the high priority input queue cache or the low priority input queue cache according to the real-time parameters in the location service information frame;

High priority input queue buffer, storing location service information frame data for real-time application services;

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

The priority scheduling module can be configured with multiple scheduling modes such as absolute priority, timed polling, and weight allocation. It will give priority to querying the high-priority input queue cache while avoiding blocking of the low-priority input queue cache, extracting the location service information frame from it, and transferring it to the matching calculation module for processing;

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

Output queue buffer, storing all location service information frame data waiting to be sent to the broadcast 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 broadcast cloud platform creates a publish-subscribe channel for digital broadcast base stations to facilitate the push of IoT location service data. It uses a location-based routing mechanism to distribute location service information frames to the corresponding digital broadcast base stations for broadcasting. The location service cloud platform uses the network interface provided by the data broadcast cloud platform to call the publish-subscribe channel implemented by it, push location service information frames to IoT terminals in a specific area, and realize rich location service applications.

The specific workflow of the location service cloud platform publishing the location service information frame through the data broadcast cloud platform is as follows:

1. The IoT terminal searches for and receives the CDRadio digital broadcast signal, obtains the broadcast station ID, and then sends the location service subscription information corresponding to the broadcast station ID 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 broadcast 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 broadcast cloud platform;

4. The data broadcast cloud platform receives the location service information frame issued by the location service cloud platform, extracts the real-time parameter, distinguishes between real-time application and non-real-time application according to the value of the real-time parameter, and puts the location service information frame into the high-priority input queue cache or the low-priority input queue cache respectively;

5. The data broadcast cloud platform selects the absolute priority, timed polling or weight distribution scheduling algorithm according to the predetermined configuration, and extracts the location service information frame from the high priority input queue cache or the low priority input queue cache 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 corresponding relationship between the location service information frame and the digital broadcast base station, i.e., the channel mapping table;

7. The data broadcast cloud platform uses the channel subscription table to check the channel mapping table, removes unsubscribed channels, and then updates 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 broadcast cloud platform is sent to the corresponding digital broadcast base station.

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

The start word and the end word respectively indicate the start and end of a location service information frame. The ASCII code 0x23 corresponding to the character "#" indicates the start word, and the ASCII code 0x04 corresponding to the transmission end character EOT indicates the end word.

Control word: indicates through different bit values whether the current location service information frame has a check word, whether it is return 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 routing processing, consisting of real-time parameters, spatial location parameters, and channel mapping table, see the table below:

Content length, which 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.

Content data, the specific format of which 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 the 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, it is easy to add, subtract, or replace part or all of the information to achieve the role of the location service information frame shown in the figure.

In addition, an embodiment of the present invention further provides an Internet of Things broadcasting device, which is applied to a broadcasting station and includes:

A sending module, used for sending a service channel signal to terminals in a preset area in the form of digital broadcast;

A determination module, configured to obtain a service subscription request fed back by the terminal based on the service channel signal, and determine a target subscription service according to the service subscription request;

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

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

Optionally, the determining module includes:

An acquisition unit, configured to respectively acquire all service subscription requests fed back by each terminal based on signals of different service channels, and determine a service subscription table of the corresponding terminal according to each service subscription request;

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

Optionally, the broadcast 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 broadcast station;

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

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

Optionally, the service subscription request includes a first fuzzy location parameter, and the determining module includes:

A second determining unit is configured to determine a target subscription service according to the service subscription request and the first fuzzy position parameter, wherein the target service content received by the broadcasting station based on the target subscription service feedback includes the second fuzzy position parameter;

The broadcast module comprises:

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

Optionally, the determining module further includes:

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

A first judgment unit is configured to obtain a remote call parameter in the service subscription request, send the remote call parameter and the service subscription request to the network service program, and obtain the remote service content fed back by the network service program in the form of digital broadcast based on the remote call parameter and the service subscription request;

The second judgment unit is used to execute the function of determining the target subscription service according to the service subscription request if no.

Optionally, the target service content includes a real-time parameter, and the broadcast module includes:

A second detection unit is used 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 a real-time parameter;

A first priority unit, configured to push the target service content to a first priority queue if yes;

a second priority unit, configured to push the target service content to a second priority queue if no;

The second sending unit is used to send 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.

Optionally, the service channel signal includes a channel name, and the channel name serves as a hidden pseudonym for each terminal service subscription request.

In addition, an embodiment of the present invention also proposes a broadcast station, which includes: a memory 109, a processor 110, and an Internet of Things broadcast program stored in the memory 109 and executable on the processor 110, wherein the Internet of Things broadcast program implements the steps of each embodiment of the above-mentioned Internet of Things broadcast method when executed by the processor 110.

In addition, the present invention also provides a computer storage medium, which stores an Internet of Things broadcast program, and the Internet of Things broadcast program can also be executed by a processor to implement the steps of each embodiment of the above-mentioned Internet of Things broadcast method.

The expanded contents of the specific implementation methods of the broadcasting station and storage medium (ie, computer storage medium) of the present invention are basically the same as those of the above-mentioned embodiments of the Internet of Things broadcasting method, and will not be elaborated here.

It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) as described above, and includes a number of instructions for enabling an Internet of Things broadcasting device (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in each embodiment of the present invention.

The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims (8)

1. An Internet of Things broadcasting method, characterized in that the Internet of Things broadcasting method is applied to a broadcasting station, and the Internet of Things broadcasting method comprises: The broadcasting station sends service channel signals to terminals in a preset area in the form of digital broadcasting; The broadcast station obtains a service subscription request fed back by the terminal based on the service channel signal, and determines a target subscription service according to the service subscription request; The broadcast station sends 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, the broadcast station sends the target service content to the terminals in the preset area in the form of digital broadcast; The service subscription request includes a first fuzzy location parameter, The step of determining the target subscription service according to the service subscription request comprises: The broadcast station determines a target subscription service according to the service subscription request and the first fuzzy position parameter, wherein the target service content received by the broadcast station based on the target subscription service feedback includes a second fuzzy position parameter; The step of sending the target service content to the terminals in the preset area in the form of digital broadcasting comprises: Determine a fuzzy area within a preset area according to the second fuzzy position parameter, and send the target service content to a terminal in the fuzzy area in a digital broadcasting form; The step of the broadcasting station acquiring a service subscription request fed back by the terminal based on the service channel signal, and determining a target subscription service according to the service subscription request further includes: The broadcast station obtains the service subscription request fed back by the terminal based on the service channel signal, and detects whether there is a remote call request in the service subscription request; If so, obtaining the remote call parameters in the service subscription request, and sending the remote call parameters and the service subscription request to the network service program, and obtaining the remote service content fed back by the network service program in the form of digital broadcast based on the remote call parameters and the service subscription request, and sending the remote service content to the terminal, so that the terminal returns the result of the location service after completing the calculation based on the remote service content; If not, the step of determining the target subscription service according to the service subscription request is executed. 2. The Internet of Things broadcasting method according to claim 1, characterized in that the broadcasting station obtains the service subscription request of the terminal based on the service channel signal feedback, and the step of determining the target subscription service according to the service subscription request comprises: The broadcast station obtains all service subscription requests fed back by each terminal based on signals of different service channels, and determines a service subscription table of the corresponding terminal according to each service subscription request; A channel subscription table of the broadcasting station is determined according to the service subscription table, and a target subscription service of the broadcasting station is determined 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 step of sending the target service content to the terminals in the preset area in the form of digital broadcasting comprises: The broadcast 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 broadcast station; The broadcasting station parses the local target service content in the target service content according to the local location parameter; The broadcasting station sends 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 1, wherein the target service content includes real-time parameters, If the broadcast 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 terminals in the preset area in the form of digital broadcasting comprises: The broadcast 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 a real-time parameter; If yes, push the target service content to the first priority queue; If not, pushing 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. 5. The Internet of Things broadcasting method according to any one of claims 1 to 4, characterized in that the service channel signal includes a channel name, and the channel name serves as an anonymous name for each terminal service subscription request. 6. An Internet of Things broadcasting device, characterized in that the Internet of Things broadcasting device is applied to a broadcasting station, and the Internet of Things broadcasting device comprises: A sending module, used for sending a service channel signal to terminals in a preset area in the form of digital broadcast; A determination module, configured to obtain a service subscription request fed back by the terminal based on the service channel signal, and determine a target subscription service according to the service subscription request; The service subscription request includes a first fuzzy position parameter, the determination module is further used to determine a target subscription service according to the service subscription request and the first fuzzy position parameter, and the target service content received by the broadcast station based on the feedback of the target subscription service includes a second fuzzy position parameter; The determination module is also used for the broadcast station to obtain the service subscription request fed back by the terminal based on the service channel signal, and detect whether the service subscription request contains a remote call request; if so, obtain the remote call parameter in the service subscription request, and send the remote call parameter and the service subscription request to the network service program, and obtain the remote service content fed back by the network service program in the form of digital broadcast based on the remote call parameter and the service subscription request, and send the remote service content to the terminal, so that the terminal returns the result of the location service after completing the calculation based on the remote service content; if not, execute the step of determining the target subscription service according to the service subscription request; A sending module, used for sending the target subscription service to a network service program; a broadcast module, configured to send the target service content to the terminals in the preset area in the form of digital broadcast if the target service content fed back by the network service program based on the target subscription service is received; The broadcast module is further configured to determine a fuzzy area within a preset area according to a second fuzzy position parameter, and send the target service content to a terminal in the fuzzy area in a digital broadcasting form. 7. A broadcasting station, characterized in that the broadcasting station comprises: a memory, a processor, and an Internet of Things broadcasting program stored in the memory and executable on the processor, wherein the Internet of Things broadcasting program, when executed by the processor, implements the steps of the Internet of Things broadcasting method as described in any one of claims 1 to 5. 8. A storage medium, characterized in that an Internet of Things broadcasting program is stored on the storage medium, and when the Internet of Things broadcasting program is executed by a processor, the steps of the Internet of Things broadcasting method as described in any one of claims 1 to 5 are implemented.