WO2020259525A1

WO2020259525A1 - Communication method and apparatus

Info

Publication number: WO2020259525A1
Application number: PCT/CN2020/097876
Authority: WO
Inventors: 徐蓓
Original assignee: 华为技术有限公司
Priority date: 2019-06-28
Filing date: 2020-06-24
Publication date: 2020-12-30
Also published as: CN112153558A; CN112153558B

Abstract

The present application relates to the technical field of communications. Disclosed are a communication method and apparatus. The method comprises: an IoT platform determining N terminal devices for a first service to be processed, and determining, from the N terminal devices, P target terminal devices that support near field communication; and the IoT platform determining M relay devices that support the first service, sending a first message to the M relay devices, and sending a second message to terminal devices, other than the P target terminal devices, from among the N terminal devices. By using the method, the IoT platform sends the first message to the M relay devices, such that the M relay devices can broadcast service information of the first service by means of near field communication. With regard to the terminal devices, other than the P target terminal devices, from among the N terminal devices, the IoT platform can send the service information of the first service by means of unicast, thereby effectively ensuring that the N terminal devices can all effectively receive the service information of the first service.

Description

Communication method and device

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on June 28, 2019, the application number is 201910580529.8, and the application name is "a communication method and device", the entire content of which is incorporated into this application by reference.

Technical field

This application relates to the field of communication technology, and in particular to a communication method and device.

Background technique

The Internet of Things (IoT) is an important part of the new generation of information technology and an important development stage in the "informatization" era. As the name implies, the Internet of Things is the Internet of things connected, which has two meanings: First, the core and foundation of the Internet of Things is still the Internet, which is an extension and expansion network based on the Internet; second, its user-side extension and It extends to any item and item, for information exchange and communication, that is, the interaction between objects. The Internet of Things is widely used in the integration of networks through communication perception technologies such as intelligent perception, recognition technology and pervasive computing. Therefore, it is called the third wave of the development of the world's information industry after computers and the Internet.

The Internet of Vehicles is a typical application of the Internet of Things in the field of intelligent transportation systems (ITS). Specifically, the Internet of Vehicles is based on the intranet, the inter-vehicle network and the in-vehicle mobile Internet, according to the agreed communication protocol and data. Interaction standard, a large-scale system network for wireless communication and information exchange between the vehicle and the outside world (V2X), where X is the vehicle, mobile equipment, pedestrian, network, etc. The Internet of Vehicles is an integrated network that can realize intelligent traffic management, intelligent dynamic information services and intelligent vehicle control.

In the field of intelligent transportation systems, V2X communication can be applied to a variety of possible scenarios, such as the signal push business scenario, in which the IoT platform needs to push the signal light information to a group of vehicles at a specified location; another example is the road congestion push business Scenario, in this scenario, the IoT platform needs to send road congestion information to a set of roadside signs and vehicles at a specified location. In the two scenarios illustrated above, both involve sending service information to a group of terminal devices (including vehicles). However, how to effectively send service information to a group of terminal devices requires further research. .

Summary of the invention

In view of this, this application provides a communication method and device for effectively sending service information to a group of terminal devices.

In the first aspect, an embodiment of the present application provides a communication method, including:

The IoT platform determines the N terminal devices to be processed for the first service, and determines from the N terminal devices P target terminal devices that support short-range communication, and the N terminal devices support the first service; the IoT platform determines to support the first service M relay devices in the M relay devices, the short-range communication of each relay device in the M relay devices covers at least one target terminal device in the P target terminal devices; the IoT platform sends the first message to the M relay devices, A message includes indication information and service information of the first service, and the indication information is used to indicate that the service information of the first service is broadcast through short-range communication; and, the IoT platform sends out terminal equipment other than P target terminal equipment among the N terminal equipment Send a second message, the second message includes the service information of the first service; where N, M, and P are all integers.

Using the above method, the IoT platform determines P target terminal devices that support short-range communication and determines M relay devices from N terminal devices, and sends the first message to M relay devices so that M relay devices The business information of the first service can be sent to P target terminal devices through near field communication. For terminal devices other than the P target terminal devices among the N terminal devices, the IoT platform can send the first service information through unicast. The service information of the service effectively ensures that all N terminal devices can effectively receive the service information of the first service. Further, in the embodiment of the present application, the services supported by the M relay devices are fully considered when determining the M relay devices, so that the determined M relay devices are all relay devices supporting the first service. , To avoid the phenomenon that the P target terminal devices may not receive the service information of the first service because the relay device does not support the first service and discards the service information of the first service.

In a possible design, the IoT platform determines N terminal devices, including: the IoT platform receives a third message from the application server, the third message includes the information of the first area, the service information of the first service, and the target terminal type, The service information of a service includes the service identifier of the first service; the IoT platform obtains multiple terminal devices located in the first area according to the information in the first area; the IoT platform obtains a list of services supported by multiple terminal devices and multiple terminal devices According to the service list supported by multiple terminal devices and the types of multiple terminal devices, N terminal devices are determined from the multiple terminal devices. The service list supported by the N terminal devices includes the identification of the first service, N The type of each terminal device in the two terminal devices matches the target type.

That is, the IoT platform can determine N terminal devices according to the information of the first area, the business information of the first service, and the target terminal type, that is, the IoT platform can determine N terminal devices according to the dynamic group message sent by the application server.

In a possible design, the IoT platform determines N terminal devices, including: the IoT platform receives a third message from the application server. The third message includes the identity of the first group and the service information of the first service. The service information includes the service identifier of the first service; the IoT platform obtains N terminal devices belonging to the first group.

In other words, the IoT platform can determine N terminal devices according to the static group message sent by the application server.

In a possible design, the IoT platform determines P target terminal devices that support short-range communication from N terminal devices, including: the IoT platform obtains the communication capability information of the N terminal devices, and the N terminal devices include the first A terminal device. The communication capability information of the first terminal device is used to indicate whether the first terminal device supports short-range communication, or to indicate the public land mobile network PLMN list of the first terminal device that supports short-range communication; the IoT platform is based on N The communication capability information of the terminal device determines P target terminal devices from N terminal devices; the communication capability information of the target terminal device indicates that the target terminal device supports short-range communication, or the PLMN list of the target terminal device that supports near-field communication includes The PLMN that the target terminal device accesses.

In a possible design, the IoT platform determines M relay devices, including: the IoT platform obtains the mobile identities of the P target terminal devices, and the mobile identity of the target terminal device is used to indicate that the target terminal device is in a mobile state or in a stationary state ; If the IoT platform determines that the P target terminal devices include M target terminal devices in a stationary state, it will determine the M target terminal devices in a stationary state as M relay devices.

In the above manner, the IoT platform directly determines the relay device from the P target terminal devices, thereby effectively saving processing resources and improving processing efficiency.

In a possible design, the instruction information is also used to instruct to process the service information of the first service. Since the relay device is a device in the P target terminal devices, the instruction information may also instruct the relay device to perform local processing on the service information of the first service.

In a possible design, the method further includes: the IoT platform, according to the information of the first area, the communication capability information of the at least one terminal device, the service list supported by the at least one terminal device, and the mobile identity of the at least one terminal device, from at least M relay devices are determined in one terminal device; at least one terminal device is a terminal device other than the P target terminal devices; wherein, at least one terminal device includes a second terminal device, and the mobile identifier of the second terminal device is used to indicate the first terminal device. 2. The terminal device is in a mobile state or in a stationary state; the communication capability information of the second terminal device is used to indicate whether the second terminal device supports short-range communication, or indicates the PLMN list of the second terminal device that supports short-range communication; If the second terminal device supports short-range communication, the communication capability information of the second terminal device includes the short-range communication coverage of the second terminal device; M relay devices are terminal devices in a stationary state, and M relay devices support services The list includes the identification of the first service.

In a possible design, before the IoT platform determines M relay devices from at least one terminal device, it further includes: the IoT platform determines that the P target terminal devices do not include terminal devices in a stationary state.

In a possible design, the short-range communication of the M relay devices completely covers the target terminal device in the mobile state among the P target terminal devices.

In a possible design, if the short-range communication of the M relay devices does not completely cover the target terminal device in the mobile state, the first message also includes the information of at least one of the target terminal devices in the mobile state. Location information and moving speed.

In this way, by sending the location information and moving speed of at least one target terminal device in the moving state to the relay device, the relay device can determine based on the location information and moving speed of the at least one target terminal device Broadcasting times and broadcasting time to ensure that all target terminal devices in a mobile state can receive the service information of the first service.

In a possible design, the first message is a multicast message or a unicast message; and/or, the second message is a unicast message.

In the second aspect, an embodiment of the present application provides a communication method, including:

The relay device receives the first message sent by the IoT platform. The first message includes indication information and service information of the first service. The indication information is used to instruct the relay device to broadcast the service information of the first service through short-range communication; the first message also Including the location information and moving speed of at least one of the P target terminal devices; the relay device determines the broadcast of the service information of the first service according to the location information and moving speed of at least one of the P target terminal devices Time and broadcast times; the relay device broadcasts the service information of the first service according to the broadcast time and broadcast times.

In a possible design, the first message includes location information and moving speed of each target terminal device in the P target terminal devices;

The relay device determines the broadcast time and the number of times of broadcasting the service information of the first service according to the location information and moving speed of the P target terminal devices, including: the relay device according to the location of each target terminal device in the P target terminal devices Information, determine the third terminal device farthest from the relay device, and determine the broadcast time and broadcast times of the service information of the first service according to the location information and moving speed of the third terminal device.

In a possible design, the first message includes the location information and moving speed of the third terminal device among the P target terminal devices; the third terminal device is the target terminal furthest from the relay device among the P target terminal devices equipment;

The relay device determines the broadcast time and the number of broadcasts for broadcasting the service information of the first service according to the location information and moving speed of at least one terminal device among the P target terminal devices, including: the relay device according to the location information of the third terminal device and The moving speed determines the broadcast time and broadcast times of the service information of the first service.

In a third aspect, an embodiment of the present application provides a communication method, including: an application server determines a third message, the third message includes the information of the first area and the service information of the first service; wherein the service information of the first service includes the first The service identifier of a service; the application server sends a third message to the IoT platform.

In a possible design, the third message also includes the target terminal type.

In a fourth aspect, an embodiment of the present application provides a communication method, including: an application server determines a third message, the third message includes the identity of the first group and the service information of the first service; wherein the service information of the first service includes The service identifier of the first service; the application server sends the third message to the IoT platform.

In a fifth aspect, an embodiment of the present application provides a device, which may be an IoT platform or a semiconductor chip set in the IoT platform. The device has the function of realizing various possible designs of the first aspect. This function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above-mentioned functions.

In a sixth aspect, an embodiment of the present application provides a device, which may be a relay device or a semiconductor chip provided in the relay device. The device has the function of realizing various possible designs of the second aspect. This function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above-mentioned functions.

In a seventh aspect, an embodiment of the present application provides a device, which may be an application server, or may also be a semiconductor chip set in the application server. The device has the function of realizing the third aspect or the fourth aspect. This function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above-mentioned functions.

In an eighth aspect, an embodiment of the present application provides a communication system, which includes the IoT platform described in the fifth aspect and the relay device described in the sixth aspect, and may further include the IoT platform described in the seventh aspect. application server.

In a ninth aspect, an apparatus of an embodiment of the present application includes: a processor and a memory; the processor is used to execute instructions stored on the memory, and when the instructions are executed, the apparatus executes the above-mentioned first to fourth aspects. Any possible design method.

In a tenth aspect, an embodiment of the present application further provides a computer-readable storage medium, including instructions, which when executed, implement the foregoing aspects or any of the possible design methods of the aspects.

In an eleventh aspect, embodiments of the present application also provide a computer program product, including a computer program or instruction, which when executed, implements the above-mentioned aspects or any of the possible design methods in each aspect.

Description of the drawings

Figure 1 is a schematic diagram of some scenes of V2X;

Figure 2 is a schematic diagram of a system architecture provided by an embodiment of the application;

FIG. 3 is a schematic diagram of the terminal device 1 reporting data to the IoT platform according to an embodiment of the application;

FIG. 4 is an example of a process of sending messages to group members in a multicast manner according to an embodiment of the application;

FIG. 5 is a schematic flowchart corresponding to a communication method provided by an embodiment of this application;

Fig. 6a is a schematic diagram of group creation provided by an embodiment of the application;

FIG. 6b is a schematic diagram of the implementation of a communication method provided by an embodiment of this application;

FIG. 6c is a schematic diagram of the first area determined according to the location information of P target terminal devices according to an embodiment of the application;

FIG. 7 is a possible exemplary block diagram of a device involved in an embodiment of this application;

Fig. 8 is a schematic structural diagram of an IoT platform provided by an embodiment of the application;

FIG. 9 is a schematic structural diagram of a relay device provided by an embodiment of the application.

Detailed ways

In order to make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: wideband code division multiple access (WCDMA) mobile communication system, evolved universal terrestrial radio access network (evolved universal terrestrial radio access network) , E-UTRAN) system, next generation radio access network (NG-RAN) system, long term evolution (LTE) system, worldwide interconnection for microwave access (worldwide interoperability for microwave access, WiMAX) ) Communication system, the future 5th Generation (5G) system, such as the new generation of radio access technology (NR), and the future communication system, such as the 6G system.

The business scenarios (or application scenarios) described in the embodiments of this application are intended to more clearly illustrate the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided in the embodiments of this application. Those of ordinary skill in the art will know that With the emergence of new business scenarios, the technical solutions provided in the embodiments of this application are equally applicable to similar technical problems.

In addition, in the embodiments of the present application, the term "exemplarily" is used to represent an example, illustration, or illustration. Any embodiment or implementation solution described as an "example" in this application should not be construed as being more preferable or advantageous than other embodiments or implementation solutions. Rather, the term example is used to present the concept in a concrete way.

Hereinafter, some terms in the embodiments of the present application will be explained to facilitate the understanding of those skilled in the art.

(1) Terminal devices include devices that provide users with voice and/or data connectivity. For example, they may include handheld devices with wireless connection functions or processing devices connected to wireless modems. The terminal device can communicate with the core network via a radio access network (RAN), and exchange voice and/or data with the RAN. The terminal equipment may include a vehicle (vehicle), a vehicle module (vehicle module), user equipment (user equipment, UE), wireless terminal equipment, mobile terminal equipment, subscriber unit (subscriber unit), subscriber station (subscriber station), mobile station (mobile station), mobile station (mobile), remote station (remote station), access point (AP), remote terminal equipment (remote terminal), access terminal equipment (access terminal), user terminal equipment (user terminal), user agent (user agent), or user equipment (user device), etc. For example, it may include mobile phones (or "cellular" phones), computers with mobile terminal equipment, portable, pocket-sized, handheld, computer-built or vehicle-mounted mobile devices, smart wearable devices, and so on. For example, personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (personal digital assistants, etc.) PDA), and other equipment. It also includes restricted devices, such as devices with low power consumption, or devices with limited storage capabilities, or devices with limited computing capabilities. Examples include barcodes, radio frequency identification (RFID), sensors, global positioning system (GPS), laser scanners and other information sensing equipment.

As an example and not a limitation, in the embodiment of the present application, the terminal device may also be a wearable device. Wearable devices can also be called wearable smart devices. It is a general term for the application of wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes. A wearable device is a portable device that is directly worn on the body or integrated into the user's clothes or accessories. Wearable devices are not only a hardware device, but also realize powerful functions through software support, data interaction, and cloud interaction. In a broad sense, wearable smart devices include full-featured, large-sized, complete or partial functions that can be achieved without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, and need to cooperate with other devices such as smart phones. Use, such as various smart bracelets, smart helmets, smart jewelry, etc. for physical sign monitoring.

The terminal device of the embodiment of the present application may also be an on-board module, on-board module, on-board component, on-board chip, or on-board unit that is built into a vehicle as one or more components or units. A group, a vehicle-mounted component, a vehicle-mounted chip, or a vehicle-mounted unit may implement the method of the embodiments of the present application.

(2) V2X, specifically including vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-pedestrian (V2P) Direct communication, and vehicle-to-network (V2N) communication interaction and other application requirements. As shown in Figure 1. V2V refers to the communication between vehicles; V2P refers to the communication between vehicles and people (including pedestrians, cyclists, drivers, or passengers); V2I refers to the communication between the vehicle and the roadside unit (RSU) Communication, there is another type of V2N that can be included in V2I. V2N refers to the communication between the vehicle and the base station/network.

Among them, the RSU can be a fixed infrastructure entity that supports V2X applications, and can exchange messages with other entities that support V2X applications. RSU includes two types: terminal type RSU, because it is located on the roadside, the terminal type RSU is in a non-mobile state, and there is no need to consider mobility; base station type RSU can provide timing synchronization and resources for the vehicles communicating with it Scheduling. The RSU involved in the embodiment of the present application mainly refers to a terminal type RSU.

(3) The terms "system" and "network" in the embodiments of this application can be used interchangeably. "Multiple" refers to two or more. In view of this, "multiple" may also be understood as "at least two" in the embodiments of the present application. "At least one" can be understood as one or more, for example, one, two or more. For example, including at least one means including one, two or more, and it does not limit which ones are included. For example, if at least one of A, B, and C is included, then A, B, C, A and B, A and C, B and C, or A and B and C are included. In the same way, the understanding of "at least one" and other descriptions is similar. "And/or" describes the association relationship of the associated objects, indicating that there can be three types of relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone. In addition, the character "/", unless otherwise specified, generally indicates that the associated objects before and after are in an "or" relationship.

Unless otherwise stated, ordinal numbers such as "first" and "second" mentioned in the embodiments of this application are used to distinguish multiple objects, and are not used to limit the order, timing, priority, or importance of multiple objects. For example, the first time domain resource and the second time domain resource are only used to distinguish different time domain resources, and not to limit the priority or importance of the two time domain resources.

The embodiments of the present application can be applied to a variety of possible systems, such as an intelligent transportation system. The intelligent transportation system will be used as an example for detailed description below.

Figure 2 is a schematic diagram of a system architecture provided by an embodiment of the application. As shown in Figure 2, the system architecture includes an application server, an IoT platform, and one or more terminal devices (such as the terminal device 1 shown in Figure 2). , Terminal equipment 2, terminal equipment 3, terminal equipment 4, terminal equipment 5).

Among them, (1) Application server: It can be a vehicle networking application server (V2X application server, V2X AS), which is used to provide various business services for terminal devices (such as vehicle terminals). (2) IoT platform: used to provide Internet of Things services. The IoT platform can support terminal devices to report terminal device data (such as terminal device location information) to it, and can also send business information and control commands to terminal devices. In one example, the IoT platform may be a cloud platform, or a cloud server, or a network-side server; in another example, the IoT platform may also be an edge gateway or edge node deployed on the edge side. (3) One or more terminal devices: it can include multiple types of terminal devices, such as terminal devices held by pedestrians, terminal devices installed or placed in vehicles (ie, vehicle-mounted terminals), RSUs, etc.

Illustratively, taking the terminal device 1 as an example, FIG. 3 is a schematic diagram of a possible implementation manner in which the terminal device 1 reports the data of the terminal device 1 to the IoT platform. As shown in Figure 3:

In step 301, the terminal device 1 obtains the first information of the terminal device 1 from a control function (CF) network element in the home public land mobile network (PLMN) of the terminal device 1.

Here, the operator can pre-configure the configuration information of the terminal device 1 and store it in the CF network element. The configuration information of the terminal device 1 can include the identity of the terminal device 1, the mobile identity of the terminal device 1, the type of the terminal device 1, and the terminal device 1. The communication capability information of the device 1 and one or more items in the list of services supported by the terminal device 1 are not specifically limited. Exemplarily, the first information of the terminal device 1 may include part of the information in the configuration information of the terminal device 1. For example, the first information of the terminal device 1 may include the identity of the terminal device 1, the mobile identity of the terminal device 1, and the terminal device 1. The type of terminal device 1 communication capability information. In other possible embodiments, the first information of the terminal device 1 may also be the configuration information of the terminal device 1.

The content included in the configuration information of the terminal device 1 will be explained as follows: (1) The identifier of the terminal device 1 is information used to identify the terminal device 1, which is not specifically limited. (2) The mobile identity of the terminal device 1 is used to indicate that the terminal device is in a mobile state or in a stationary state. For example, if the mobile identity of the terminal device 1 is mobile, it means that the terminal device 1 is in a mobile state; if the mobile identity of the terminal device 1 is Static, it means that the terminal device 1 is in a static state. For another example, the mobile identification of terminal device 1 can be 1 bit. If the value of the bit is "1", it means that the terminal device 1 is in the mobile state, and if the value of the bit is "0", it means that the terminal is 1 is at a standstill. (3) The type of the terminal device 1 may include a vehicle-mounted terminal, a terminal device held by a pedestrian, and an RSU, and may also include other possible types, which are not specifically limited. (4) Communication capability information of the terminal device 1: If the terminal device 1 is an RSU, the communication capability information of the terminal 1 is used to indicate whether the terminal device 1 supports short-range communication, and further, if the terminal device 1 supports short-range communication, then The communication capability information of the terminal device 1 may include the coverage area of the short-range communication of the terminal device 1. If the terminal device 1 is a vehicle-mounted terminal or a terminal device held by a pedestrian, the communication capability information of the terminal 1 is used to indicate that the terminal device 1 supports proximity. The list of PLMNs for distance communication. For example, the list of PLMNs supporting short distance communication of terminal device 1 includes PLMN1, PLMN2, and PLMN3. If the PLMN currently accessed by terminal device 1 is PLMN1, terminal device 1 supports proximity in the currently connected PLMN. Distance communication: If the PLMN currently accessed by the terminal device is PLMN4, the terminal device 1 does not support short-range communication in the currently accessed PLMN. (5) The list of services supported by the terminal device 1 may include the identification of one or more services supported by the terminal device 1.

Step 302: The terminal device 1 registers with the IoT platform, and reports the second information of the terminal device 1.

Here, the second information of the terminal device 1 may include part or all of the information in the first information of the terminal device 1, which is not specifically limited. For example, the second information of the terminal device 1 may include the identification of the terminal device 1, the mobile identification of the terminal device 1, the type of the terminal device 1, and the communication capability information of the terminal device 1; further, it may also include the location information of the terminal device 1. , PLMN accessed by terminal device 1.

It should be noted that if the mobile identity of the terminal device 1 is mobile, the terminal device 1 can report the location information of the terminal device 1 to the IoT platform according to the set period; or the terminal device 1 can also determine the location information of the terminal device 1 After a change occurs, report the changed location information of the terminal device 1 to the IoT platform; thereby enabling the location information of the terminal device 1 recorded in the IoT platform to be updated in time to ensure that the location information of the terminal device 1 recorded in the IoT platform is accurate accuracy.

Exemplarily, in the system architecture shown in FIG. 2, the application server can deliver a group message (the group message includes business information) to the IoT platform, and the IoT platform then sends the business information to a group of terminal devices.

In an intelligent transportation system, by sending business information to terminal devices (such as vehicle-mounted terminals), the terminal devices can obtain a series of traffic information such as real-time road conditions, road information, pedestrian information, etc., to improve driving safety, reduce congestion, and improve traffic efficiency, etc. . In specific implementations, there may be a variety of business information. In one example, the business information may include: road safety-related information (such as broadcast speed, location, vehicle type, etc.); emergency vehicle priority signal control service information (such as ambulances, Fire trucks, road hazard alarms, etc.); signal light information; road congestion information; traffic accident information (such as a car accident ahead, a rear-end collision alarm).

For example, the terminal device 3, the terminal device 4, and the terminal device 5 are all vehicle-mounted terminals. The IoT platform receives the business information of a certain service (such as business 1) from the application server and needs to send the business information to the terminal device 3. Terminal equipment 4 and terminal equipment 5.

In a possible implementation, the IoT platform can send service information to the terminal device 3, the terminal device 4, and the terminal device 5 through unicast, that is, the IoT platform sends the service information to the terminal device 3, the terminal device 4, and the terminal device 5 respectively. Send a unicast message. The unicast message includes service information. In this way, when the business information needs to be sent to a large number of terminal devices, the efficiency of this method is too low, which affects user experience; and, because the IoT platform needs to send messages to multiple terminal devices separately, the IoT platform The burden is heavier and the consumption of transmission resources is greater.

In another possible implementation, the IoT platform can send service information to terminal equipment 3, terminal equipment 4, and terminal equipment 5 through multicast, such as IP multicasting or improved multimedia broadcast multicast Service (evolved multimedia broadcast multicast service, eMBMS). Take IP multicast as an example. IP multicast is an extension of the standard IP network layer protocol. It uses a specific IP multicast address to transmit IP data packets to a set of hosts in a multicast group in accordance with the principle of maximum delivery. Its basic method is: when a certain device sends data to a group of devices, the device does not need to send the data to every device in the group of devices, but only needs to send the data to a specific multicast address. Then all the devices that join the multicast group can receive the data. Figure 4 is an example of the process of sending messages to group members through multicast. It can be seen from Figure 4 that before multicasting, the request to create a multicast group must be sent through unicast (may include multicast Related user service description (user service description) information, such as multicast address, joining a multicast group, etc.) and the response returned by the receiving terminal device to ensure that the terminal can receive the multicast message. In this way, because the vehicle-mounted terminal does not spend a long time in the designated area, it is unicast and then multicast, and there are too many interactive messages. If it is a multiple broadcast service, it may not be time to complete all the processes, and it is impossible to effectively transfer the service. The information is sent to the terminal device.

Based on this, an embodiment of the present application provides a communication method for effectively sending service information to a group of terminal devices.

FIG. 5 is a schematic diagram of a process corresponding to a communication method provided by an embodiment of the application, as shown in FIG. 5, including:

Step 501: The IoT platform determines N terminal devices to be processed for the first service.

Here, there may be multiple specific implementation ways for the IoT platform to determine the N terminal devices to be processed for the first service.

In a possible implementation, the IoT platform may receive a third message from the application server. The third message includes the information of the first area and the service information of the first service. The service information of the first service includes the service identifier of the first service. ; In this case, the third message can be understood as a dynamic group message. Further, the IoT platform can obtain multiple terminal devices in the first area according to the location information of the terminal device (wherein, the location information of the terminal device may be reported to the IoT platform by the terminal device in step 302), and obtain multiple terminal devices in the first area. A list of services supported by a terminal device, N terminal devices are determined from a plurality of terminal devices according to the list of services supported by multiple terminal devices, and the list of services supported by N terminal devices includes the identification of the first service, that is, N terminal devices Support the first business.

Exemplarily, the third message may further include the target terminal type. For example, the target terminal type may include a vehicle-mounted terminal and an RSU. The type of each terminal device in the above N terminal devices matches the target terminal type (that is, the type of each terminal device belongs to the target terminal type).

For example, the third message includes the information of the first area, the service information of the first service, and the target terminal type (such as a vehicle-mounted terminal). There are 10 terminal devices in the first area, namely terminal device 1 to terminal device 10. The IoT platform can obtain the type of terminal device 1 to terminal device 10 and the list of supported services, and then according to the type of terminal device 1 to terminal device 10 And the list of supported services, determine N (N=8) terminal devices (such as terminal device 1 to terminal device 8), of which the types of terminal device 1 to terminal device 8 are all vehicle-mounted terminals, and terminal device 1 to terminal device 8 The list of supported services includes the identification of the first service. The types of terminal device 9 and terminal device 10 are both vehicle-mounted terminals, but the service list supported by terminal device 9 and terminal device 10 does not include the identity of the first service, that is, terminal device 9 and terminal device 10 do not support the first service, and then There is also no need to send the service information of the first service to the terminal device 9 and the terminal device 10.

Exemplarily, the IoT platform can obtain the types of terminal devices 1 to 10 and the supported service list in various ways. For example, taking terminal device 1 as an example, if terminal device 1 reports the type of terminal device 1 and the list of supported services to the IoT platform through a registration request, the IoT platform can directly obtain the type of terminal device 1 and the list of supported services; If terminal device 1 does not report the type of terminal device 1 and the list of supported services to the IoT platform through a registration request, the IoT platform can go to the CF network element in the home PLMN of terminal device 1 to obtain the type of terminal device 1 and supported services List.

It should be noted that, still taking terminal device 1 as an example, if terminal device 1 reports the type of terminal device 1 to the IoT platform through a registration request, the IoT platform can directly obtain the type of terminal device 1, and the IoT platform can access the terminal The CF network element in the home PLMN of the device 1 obtains the list of services supported by the terminal device 1.

In another possible implementation manner, the IoT platform receives a third message from the application server, the third message includes the identity of the first group and the service information of the first service, and the service information of the first service includes the service of the first service. In this case, the third message can be understood as a static group message. Among them, the first group may be pre-created by the IoT platform and the application server. Illustratively, Figure 6a is a schematic diagram of the flow of the first group of the IoT platform and the application server. See Figure 6a, including: the application server to the IoT platform Send a creation request of the first group, the creation request of the first group includes the identities of multiple terminal devices (such as terminal device 1 to terminal device 10); the IoT platform receives the first creation request, and according to the first creation request Create the first group, and send a creation response to the application server, where the creation response includes the identifier of the first group.

After the IoT platform receives the third message, it obtains multiple terminal devices (ie, terminal device 1 to terminal device 10) belonging to the first group according to the identity of the first group; the IoT platform obtains a list of services supported by multiple terminal devices , And determine N (N=8) terminal devices (such as terminal device 1 to terminal device 8) from multiple terminal devices according to the service list supported by multiple terminal devices, and the list of services supported by terminal device 1 to terminal device 8 Including the identification of the first service, and the service list supported by the terminal device 9 and the terminal device 10 does not include the identification of the first service, that is, the terminal device 9 and the terminal device 10 do not support the first service, and there is no need to provide the terminal device 9 and the terminal device 9 The device 10 sends service information of the first service.

According to the foregoing description, the N terminal devices determined in step 501 may all be vehicle-mounted terminals, or may also include vehicle-mounted terminals and RSUs.

In step 502, the IoT platform determines P target terminal devices that support short-range communication from the N terminal devices.

In the embodiment of this application, the IoT platform determines from N terminal devices P target terminal devices that support short-range communication in specific implementation manners. For example, the IoT platform obtains the communication capability information of N terminal devices according to For the communication capability information of N terminal devices, P target terminal devices are determined from the N terminal devices. Among them, the IoT platform can obtain the communication capability information of N terminal devices in many ways. Taking terminal device 1 as an example, if terminal device 1 reports the communication capability information of terminal device 1 to the IoT platform through a registration request, the IoT platform The communication capability information of the terminal device 1 can be directly obtained; if the terminal device 1 does not report the communication capability information of the terminal device 1 to the IoT platform through a registration request, the IoT platform can obtain it from the CF network element in the home PLMN of the terminal device 1 Communication capability information of the terminal device 1.

Exemplarily, the N terminal devices include the first terminal device. If the first terminal device is an RSU, the communication capability information of the first terminal device is used to indicate whether the first terminal device supports short-range communication. In this case, The IoT platform can determine whether the first terminal device supports short-range communication according to the communication capability information of the first terminal device. If it does, the first terminal device is the target terminal device; if the first terminal device is a vehicle-mounted terminal, the first terminal The communication capability information of the device is used to indicate the PLMN list of the first terminal device that supports short-range communication. In this case, the IoT platform can obtain the PLMN accessed by the first terminal device (for example, the PLMN accessed by the first terminal device may be Reported by the first terminal device to the IoT platform via a registration request), if the PLMN list of the first terminal device that supports short-range communication includes the PLMN accessed by the first terminal device, it can be determined that the first terminal device is the target terminal device.

Following the above example, the N terminal devices include terminal device 1 to terminal device 8. For example, the determined P target terminal devices may include terminal device 1 to terminal device 7, and terminal device 8 does not support short-range communication.

It should be noted that if the IoT platform determines N terminal devices based on static group messages, after the IoT platform determines P target terminal devices, it can determine to cover P targets based on the location information of the P target terminal devices Information about the first area of the terminal device. For example, referring to FIG. 6c, it is a schematic diagram of the first area determined according to the location information of P target terminal devices. Fig. 6c is only a simple example, and the shape of the first region determined in the specific implementation may have various shapes, which are not specifically limited.

In the embodiments of the present application, short-range communication may include multiple types, such as dedicated short-range communications (DSRC), proximity communication 5 (proximity communication five, PC5), etc., which are not specifically limited.

In an example, the IoT platform can obtain the mobile identities of P target terminal devices. If the number of target terminal devices in the moving state among the P target terminal devices is greater than or equal to the first threshold, step 503 can be performed, otherwise, The service information of the first service can be sent to N terminal devices in a multicast manner in the prior art. The first threshold may be set by those skilled in the art according to actual needs and experience, for example, the first threshold may be 1.

Step 503: The IoT platform determines M relay devices.

Here, the relay device refers to a device used to send the received business information sent by the IoT platform to the target terminal device. Illustratively, the relay device may be an RSU, a stationary vehicle, or the like.

In the embodiments of the present application, there may be multiple specific implementation ways for the IoT platform to determine M relay devices. For example, the IoT platform can determine at least one relay device whose short-range communication coverage and the first area overlap, and use the at least one relay device as M relay devices; or, the IoT platform can also determine the short distance Communication covers at least one relay device of at least one target terminal device, and uses the at least one relay device as M relay devices.

The short-range communication of the relay device involved in the embodiment of the present application covers at least one target terminal device, and it can be understood that at least one target terminal device is located within the short-range communication coverage of the relay device. For example, if the short-range communication of the relay device covers the target terminal device a and the target terminal device b, it can be understood that the target terminal device a and the target terminal device b are located within the short-range communication coverage of the relay device.

Two possible specific implementations are described below.

In a possible implementation manner, the IoT platform may try to select a relay device from P target terminal devices. Exemplarily, the IoT platform can obtain the mobile identities of P target terminal devices, and determine whether the P target terminal devices include the target terminal device in a stationary state, and if the P target terminal devices include the target terminal device in a stationary state, then The target terminal device in a static state can be determined as a relay device. For example, if terminal device 1 to terminal device 7 include two terminal devices in a static state, the IoT platform can use these two terminal devices in a static state as relay devices (referred to as relay device 1 and relay device). 2). In this situation, on the one hand, because the relay device is located in the first area, the short-range communication coverage of the relay device overlaps with the first area; on the other hand, because the relay device It is the target terminal device itself, therefore, the short-range communication of the relay device covers at least one target terminal device.

In view of this situation, in an example, after the IoT platform selects a relay device from P target terminal devices, it can also select other possible relay devices. For example, if the IoT platform selects relay device 3 again, then At this time, the relay device determined by the IoT platform includes the relay device 1, the relay device 2, and the relay device 3. Illustratively, the IoT platform can select other possible relay devices in many ways, for example, see In the following, if the IoT platform determines that the P target terminal devices do not include terminal devices in a stationary state, it selects the relay device method. In an example, after the IoT platform selects the relay device from the P target terminal devices, it may not select other possible relay devices. At this time, the relay device determined by the IoT platform includes the relay device 1 and the middle device. Following equipment 2.

If the IoT platform determines that P target terminal devices do not include terminal devices in a stationary state (that is, terminal devices 1 to 7 are in a mobile state), it can select relay devices from terminal devices other than the P target terminal devices For example, according to the information of the first area, the communication capability information of the at least one terminal device, the service list supported by the at least one terminal device, and the mobile identity of the at least one terminal device, M relay devices can be determined from the at least one terminal device. For example, the IoT platform acquires at least one terminal device (such as terminal device 11 to terminal device 13) whose distance from P target terminal devices is less than or equal to a preset distance. The preset distance can be determined by those skilled in the art according to actual needs and experience. Make settings. Taking the terminal device 11 as an example, the distance between the terminal device 11 and the P target terminal devices is less than or equal to the preset distance, which can be understood as the distance between the terminal device 11 and one of the P target terminal devices Less than or equal to the preset distance. Further, the IoT platform may obtain the communication capability information and supported service list of at least one terminal device, and determine M relay devices from the at least one terminal device according to the communication capability information and supported service list of the at least one terminal device, For example, the selected relay devices are the terminal device 11 and the terminal device 12. For ease of description, the terminal device 11 is referred to as the relay device 1, and the terminal device 12 is referred to as the relay device 2. Both relay device 1 and relay device 2 support the first service, relay device 1 and relay device 2 are both in a static state, and the short-range communication coverage of relay device 1 overlaps with the first area (or, medium). After the near-field communication of the device 1 covers at least one target terminal device), the near-field communication coverage of the relay device 2 overlaps with the first area (or, the near-field communication of the relay device 2 covers at least one target terminal device); Since the terminal device 13 does not support the first service, if the IoT platform sends the service information of the first service to the terminal device 13, the terminal device 13 will discard the service information of the first service. Therefore, the IoT platform may not use it as a destination. A relay device for the target terminal device to forward the service information of the first service.

It should be noted that in the embodiment of the present application, when determining the relay device, it may also be restricted to only determine a certain type or certain types of terminal devices as the relay device, that is, when determining the relay device, Consider the type of terminal equipment.

For example, the IoT platform only determines the vehicle-mounted terminal and RSU in a stationary state as relay devices. For ease of description, the vehicle-mounted terminal and RSU are collectively referred to as the first type. If the type of a certain terminal device is the first type, it can be It is understood that the type of the terminal device is a vehicle-mounted terminal, or the type of the terminal device is an RSU. In one example, when the relay device is determined from the P target terminal devices, the IoT platform can obtain the mobile identification and type of the P target terminal devices, and determine whether the P target terminal devices include those in a stationary state and whose type is the first For a type of target terminal device, if the P target terminal devices include target terminal devices that are in a static state and are of the first type, the target terminal devices that are in a static state and are of the first type may be determined as the relay device. In another example, when the relay device is determined from terminal devices other than the P target terminal devices, it may be based on the information of the first area, the communication capability information of at least one terminal device, the list of services supported by at least one terminal device, and at least The mobile identity of one terminal device and the type of at least one terminal device determine M relay devices from the at least one terminal device.

For another example, the IoT platform only determines the RSU as a relay device. In an example, when the relay device is determined from P target terminal devices, the IoT platform can obtain the mobile identities and types of the P target terminal devices, and determine whether the P target terminal devices are in a stationary state and the type is RSU If the target terminal device is included, the target terminal device in the static state and the type of RSU can be determined as the relay device. Understandably, if the RSU is usually in a static state and does not need to consider its mobility, the mobile identity may not be considered when determining the relay device; for example, when the relay device is determined from P target terminal devices , The IoT platform can obtain the types of P target terminal devices, and determine whether the P target terminal devices include target terminal devices of type RSU (that is, whether they include RSU). If it includes, it can include the P target terminal devices. The RSU is determined to be a relay device.

In another possible implementation manner, the IoT platform can also directly select a relay device among terminal devices other than the P target terminal devices. For example, the IoT platform can directly select the relay device according to the information of the first area and the information of at least one terminal device. The communication capability information, the service list supported by the at least one terminal device, and the mobile identity of the at least one terminal device, determine M relay devices from the at least one terminal device.

Step 504: The IoT platform sends a first message to M relay devices, where the first message includes indication information and service information of the first service, and the indication information is used to indicate that the service information of the first service is broadcast through short-range communication.

Here, the first message may be a unicast message, or the first message may also be a multicast message.

Exemplarily, if the M relay devices are relay devices selected by the IoT platform from P target terminal devices, the first message may also be a multicast message, and further, the indication information may also be used to indicate relay The device processes the business information of the first business. In this case, since the relay device is a device among the P target terminal devices, the instruction information can instruct the relay device to perform local processing on the service information of the first service, and instruct the relay device to broadcast the first service information through short-range communication. Business information of a business.

If the M relay devices are relay devices selected by the IoT platform from devices other than P target terminal devices, the first message may also be a multicast message.

If the M relay devices include the relay device selected by the IoT platform from P target terminal devices, and also include the relay device selected by the IoT platform from devices other than the P target terminal devices, the first message can be single Broadcast news. Exemplarily, when the first message is a message sent to a relay device selected from P target terminal devices, the indication information in the first message may also be used to instruct the relay device to process the service information of the first service ; When the first message is a message sent to a relay device selected from devices other than P target terminal devices, the indication information in the first message may not need to instruct the relay device to process the service information of the first service.

Step 505: The relay device receives a first message sent by the IoT platform, where the first message includes indication information and service information of the first service; and the relay device broadcasts the service information of the first service through short-range communication according to the indication information.

Exemplarily, if the indication information can also be used to instruct the relay device to process the service information of the first service, the relay device can also process the service information of the first service.

In the embodiment of the present application, if the M relay devices include the relay device selected by the IoT platform from the P target terminal devices (such as the relay device 1), after the relay device 1 receives the first message, it may be It will receive the service information of the first service broadcast by other relay devices (such as relay device 2). In this case, relay device 1 can discard the service information of the first service broadcast by relay device 2, or in other words, The service information of the first service broadcast by the relay device 2 is no longer processed. For example, the service information of the first service may be carried in a certain field. After the relay device 1 receives and processes the field, if the field is received again, the field may be discarded.

It should be noted that if the short-range communication of the M relay devices completely covers the target terminal devices in the mobile state among the P target terminal devices, it can effectively ensure that the target terminal devices in the mobile state all receive the services of the first service. Information, if the short-range communication of the M relay devices does not completely cover the target terminal device in the mobile state, in this case, the first message may also include the location of at least one target terminal device in the target terminal device in the mobile state Information and moving speed, so that the relay device can determine the broadcast time and the number of broadcasts according to the location information and moving speed of at least one target terminal device to ensure that all target terminal devices in a moving state can receive the service information of the first service.

In the following, description is made by taking as an example that P target terminal devices include Q target terminal devices in a moving state.

In an example (referred to as example 1), the first message may include the location information and the moving speed of each of the Q target terminal devices. Correspondingly, taking the relay device 1 as an example, after the relay device 1 receives the location information of the Q target terminal devices, it can determine the third terminal furthest from the relay device 1 according to the location information of the Q target terminal devices Device (such as terminal device 1) (exemplarily, the determined terminal device 1 may be the terminal device that is the farthest from the relay device 1 and moves toward the relay device 1), and then according to the location information and movement of the terminal device 1 Speed, determine the broadcast time and broadcast times. For example, the moving speed of the terminal device 1 is 40km/h, the distance between the relay device 1 and the terminal device 1 is 200m, the short-range communication distance of the relay device 1 is 50m, and the terminal device 1 moves to the relay It takes 13.5s (150m/40km/h=13.5s) to be within the NFC coverage of device 1. After terminal device 1 moves to the NFC coverage of relay device 1, it needs to move to the vicinity of relay device 1. 4.5s (50m/40km/h=4.5s), so the relay device 1 can determine that the number of broadcasts is three, the broadcast time of the first broadcast is when the first message is received, and the time of the second broadcast is the first At 13.5s after the broadcast, the third broadcast is at 4.5s after the second broadcast, thereby effectively ensuring that the terminal device 1 can receive the service information of the first service.

In another example (referred to as example 2), if the first message is a unicast message, take relay device 1 as an example, and the IoT platform can use the location information of Q target terminal devices and the location information of relay device 1 , Determine the third terminal device (such as terminal device 1) furthest from the relay device 1 (exemplarily, the determined terminal device 1 may be the terminal that is the farthest from the relay device 1 and moves toward the relay device 1 Device), and send the location information and moving speed of the terminal device 1 to the relay device 1 through the first message; accordingly, after the relay device 1 receives the first message, it can be based on the location information and moving speed of the terminal device 1 , Determine the broadcast time and broadcast times.

It should be noted that the difference between Example 1 and Example 2 above is: In Example 1, the IoT platform sends the location information of Q target terminal devices to relay device 1, and relay device 1 determines the farthest distance The target terminal device determines the broadcast time and the number of broadcasts according to the location information and moving speed of the target terminal device at the farthest distance; in this way, the computing resources of the IoT platform can be effectively saved. In Example 2, the IoT platform determines the third terminal device farthest from the relay device 1 based on the location information of the relay device 1 and the location information of the Q target terminal devices, and then combines the location information of the third terminal device with The moving speed is sent to the relay device 1. Correspondingly, the relay device 1 can directly determine the broadcast time and the number of broadcasts based on the location information and moving speed of the third terminal device; in this way, because the IoT platform only needs to transfer the third terminal The location information and moving speed of the device are sent to the relay device 1, thereby effectively saving transmission resources. Other content besides this difference can be cross-referenced.

Step 506: The IoT platform sends a second message to terminal devices other than the P target terminal devices among the N terminal devices, where the second message includes service information of the first service.

Here, the second message may be a unicast message, that is, for a terminal device that does not support short-range communication, the IoT platform may send the service information of the first service to the terminal device through a unicast message, thereby ensuring the The terminal device can also receive the service information of the first service.

It should be noted that the step numbers in Figure 5 are only numbers for ease of description, and do not constitute a restriction on the sequence of execution of each step; there is no strict execution between the steps without a timing dependency among the above steps The sequence can be adjusted according to the actual situation. The steps in FIG. 5 are not necessary steps in the execution process, and can be deleted according to actual needs in specific implementation. When N=P, step 506 may not be executed.

Using the above method, the IoT platform determines P target terminal devices that support short-range communication and determines M relay devices from N terminal devices, and sends the first message to M relay devices so that M relay devices The business information of the first service can be sent to P target terminal devices through near field communication. For terminal devices other than the P target terminal devices among the N terminal devices, the IoT platform can send the first service information through unicast. The service information of the service effectively ensures that all N terminal devices can effectively receive the service information of the first service. Refer to Figure 6b, which is a schematic diagram of the implementation of a communication method provided by an embodiment of this application. In Figure 6b, N terminal devices include terminal device 1 to terminal device 8, and P target terminal devices include terminal device 1 to terminal device. Device 7. The relay device includes relay device 1 and relay device 2 as an example. The IoT platform sends unicast or multicast messages (including service information of the first service) to relay device 1 and relay device 2. , And then relay device 1 and relay device 2 send the business information of the first service to terminal device 1 to terminal device 7. Since terminal device 8 does not support short-range communication, IoT platform sends unicast to terminal device 8. news.

In this way, compared to the IoT platform sending business information to a group of terminal devices in a multicast manner, in the embodiments of the present application, on the one hand, the IoT platform does not need to maintain dynamic group member information in real time, thereby improving performance and Resource consumption is relatively small; on the other hand, terminal equipment does not need to support multicast capabilities, but can still receive business information, which can effectively reduce the cost of terminal equipment; in addition, in the future, for 5G-Xcast, vehicle terminals that support short-range communication do not need To upgrade, only the ability of the relay device (RSU) to upgrade to 5G-Xcast is required. Further, in the embodiment of the present application, the services supported by the M relay devices are fully considered when determining the M relay devices, so that the determined M relay devices are all relay devices supporting the first service. , To avoid the phenomenon that the P target terminal devices may not receive the service information of the first service because the relay device does not support the first service and discards the service information of the first service.

Exemplarily, the following compares unicast, multicast, and the solutions of the embodiments of the present application with a specific example. For example, the coverage area of an RSU short-range communication is 200 meters (the coverage area can be understood as a circular area with a radius of 200 meters), which can cover up to 50 vehicles; at an urban crossroad, the number of RSUs is 2 (P), the vehicle terminal is 100 (Q), and the IoT platform sends 100 messages (X). If the IoT platform uses unicast to send messages, the number of messages is 100*100 (ie Q*X); if the IoT platform uses multicast to send messages, the number of messages is 200 (ie Q+X) (Among them, 100 messages are required to construct a multicast group for 100 vehicular terminals, and 100 messages are required for multicast); if the IoT platform is unicast to the RSU first, and then sent by the RSU to the vehicular terminal via PC5, the number of messages is 2 *100 (ie P*X); if the IoT platform multicasts to the RSU first, and then the RSU sends it to the vehicle terminal via PC5, the number of messages is 102 (ie P+X) (2 messages are required to construct a multicast group , Multicasting requires 100 messages), so it can be seen that when the IoT platform first multicasts to the RSU, and then the RSU sends it to the vehicle terminal through the PC5, it can effectively save the number of messages and save transmission resources.

The above-mentioned main IoT platform, relay device and terminal device interact from the perspective of the solution provided in this application. It can be understood that, in order to realize the above-mentioned functions, each network element includes a hardware structure and/or software module (or unit) corresponding to each function. Those skilled in the art should easily realize that in combination with the units and algorithm steps of the examples described in the embodiments disclosed herein, the present invention can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software-driven hardware depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered as going beyond the scope of the present invention.

In the case of an integrated unit (module), FIG. 7 shows a possible exemplary block diagram of a device involved in an embodiment of the present application, and the device 700 may exist in the form of software. The apparatus 700 may include: a processing unit 702 and a communication unit 703. The processing unit 702 is used to control and manage the actions of the device 700. The communication unit 703 is used to support communication between the apparatus 700 and other devices. Optionally, the communication unit 703 is also called a transceiving unit, and may include a receiving unit and/or a sending unit, which are used to perform receiving and sending operations, respectively. The device 700 may further include a storage unit 701 for storing program codes and/or data of the device 700.

The processing unit 702 may be a processor or a controller, which may implement or execute various exemplary logical blocks, modules, and circuits described in conjunction with the disclosure of the embodiments of the present application. The communication unit 703 may be a communication interface, a transceiver, or a transceiver circuit, etc., where the communication interface is a general term. In a specific implementation, the communication interface may include multiple interfaces. The storage unit 701 may be a memory.

The device 700 may be the IoT platform in any of the above embodiments, or may also be a semiconductor chip provided in the IoT platform. The processing unit 702 may support the device 700 to execute the actions of the IoT platform in the above method examples. Alternatively, the processing unit 702 mainly executes the internal actions of the IoT platform in the method example, and the communication unit 703 may support communication between the apparatus 700 and other devices.

Specifically, in an embodiment, the processing unit 702 is configured to: determine N terminal devices to be processed for the first service, and determine P target terminal devices that support short-range communication from the N terminal devices, and N terminals The device supports the first service; and, determining M relay devices that support the first service, the NFC coverage of each relay device in the M relay devices overlaps the first area, and the first area covers at least P Target terminal equipment;

The communication unit 703 is configured to: send a first message to M relay devices, the first message including indication information and service information of the first service, and the indication information is used to indicate to broadcast the service information of the first service through short-range communication; and, Send a second message to terminal devices other than P target terminal devices among N terminal devices, where the second message includes service information of the first service; where N, M, and P are all integers.

In a possible design, the communication unit 703 is further configured to: receive a third message from the application server, the third message including the information of the first area, the service information of the first service and the target terminal type, the service information of the first service Including the business identification of the first business;

The processing unit 702 is specifically configured to: obtain multiple terminal devices located in the first area according to the information in the first area, and obtain a list of services supported by the multiple terminal devices and the types of multiple terminal devices, and according to the multiple terminal devices The list of supported services and the types of multiple terminal devices. N terminal devices are determined from the multiple terminal devices. The list of services supported by the N terminal devices includes the identification of the first service, and the number of each terminal device in the N terminal devices. The type matches the target type.

In a possible design, the communication unit 703 is further configured to: receive a third message from the application server, the third message includes the identity of the first group and the service information of the first service, and the service information of the first service includes the first service. Business identity of the business;

The processing unit 702 is specifically configured to obtain N terminal devices belonging to the first group.

In a possible design, the processing unit 702 is specifically configured to: obtain communication capability information of N terminal devices, the N terminal devices include a first terminal device, and the communication capability information of the first terminal device is used to indicate the first terminal Whether the device supports short-range communication, or indicates the public land mobile network PLMN list supporting the short-range communication of the first terminal device; and, according to the communication capability information of the N terminal devices, determine P target terminals from the N terminal devices Device; the communication capability information of the target terminal device indicates that the target terminal device supports near field communication, or the list of PLMNs that support near field communication of the target terminal device includes the PLMN that the target terminal device accesses.

In a possible design, the processing unit 702 is specifically configured to: obtain the mobile identities of P target terminal devices, and the mobile identities of the target terminal devices are used to indicate that the target terminal device is in a moving state or in a stationary state; The terminal equipment includes M target terminal devices in a stationary state, and the M target terminal devices in a stationary state are determined as M relay devices.

In a possible design, the instruction information is also used to instruct to process the service information of the first service.

In a possible design, the processing unit 702 is specifically configured to: according to the information of the first area, the communication capability information of at least one terminal device, the service list supported by the at least one terminal device, and the mobile identity of the at least one terminal device, the M relay devices are determined in one terminal device; at least one terminal device is a terminal device other than the P target terminal devices; wherein, at least one terminal device includes a second terminal device, and the mobile identifier of the second terminal device is used to indicate the first terminal device. 2. The terminal device is in a mobile state or in a stationary state; the communication capability information of the second terminal device is used to indicate whether the second terminal device supports short-range communication, or indicates the PLMN list of the second terminal device that supports short-range communication; If the second terminal device supports short-range communication, the communication capability information of the second terminal device includes the short-range communication coverage of the second terminal device; M relay devices are terminal devices in a stationary state, and M relay devices support services The list includes the identification of the first service.

In a possible design, the processing unit 702 is specifically configured to: before determining M relay devices from at least one terminal device, determine that the P target terminal devices do not include terminal devices in a stationary state.

Using the IoT platform provided in the embodiments of the present application, P target terminal devices that support short-range communication and M relay devices can be determined from N terminal devices, and by sending the first message to M relay devices, This enables M relay devices to send the business information of the first service to P target terminal devices through short-range communication. For terminal devices other than P target terminal devices among N terminal devices, the IoT platform can use unicast The service information of the first service is sent in a way to effectively ensure that all N terminal devices can effectively receive the service information of the first service. Further, in the embodiment of the present application, the services supported by the M relay devices are fully considered when determining the M relay devices, so that the determined M relay devices are all relay devices supporting the first service. , To avoid the phenomenon that the P target terminal devices may not receive the service information of the first service because the relay device does not support the first service and discards the service information of the first service.

The apparatus 700 may also be the relay device in any of the foregoing embodiments, or may also be a semiconductor chip or functional module provided in the relay device. For example, when the relay device is a vehicle, the device 700 may be any of the following devices integrated in the vehicle, such as a telematics box (Telematics BOX, T-Box), a domain controller (DC), and a multi-domain controller (Multi -Domian Controller, MDC), Onboard Unit (OBU), etc. The processing unit 702 may support the apparatus 700 to perform the actions of the relay device in the foregoing method examples. Alternatively, the processing unit 702 mainly executes the internal actions of the relay device in the method example, and the communication unit 703 can support communication between the apparatus 700 and other devices.

Specifically, in one embodiment, the communication unit 703 is configured to: receive a first message sent by the IoT platform, the first message includes indication information and service information of the first service, and the indication information is used to instruct the relay device to communicate through short-range communication. Broadcasting the service information of the first service; the first message also includes the location information and moving speed of at least one target terminal device among the P target terminal devices;

The processing unit 702 is configured to: determine the broadcasting time and the number of broadcasting times of broadcasting the service information of the first service according to the position information and the moving speed of at least one terminal device among the P target terminal devices;

The communication unit 703 is further configured to: broadcast service information of the first service according to the broadcast time and the number of broadcasts.

In a possible design, the first message includes the location information and moving speed of each target terminal device in the P target terminal devices; the processing unit 702 is configured to: according to the location of each target terminal device in the P target terminal devices Information, determine the third terminal device farthest from the relay device, and determine the broadcast time and broadcast times of the service information of the first service according to the location information and moving speed of the third terminal device.

In a possible design, the first message includes the location information and moving speed of the third terminal device among the P target terminal devices, and the third terminal device is the target terminal furthest from the relay device among the P target terminal devices. The processing unit 702 is configured to: according to the location information and moving speed of the third terminal device, determine the broadcasting time and broadcasting times of broadcasting the service information of the first service.

With the relay device provided in the embodiment of the present application, the number of broadcasts and the broadcast time can be determined based on the location information and moving speed of at least one of the target terminal devices in the moving state, and the broadcast can be performed according to the number of broadcasts and the broadcast time, To ensure that all target terminal devices in a mobile state can receive the service information of the first service.

It should be noted that the division of units in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation. The functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.

If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of this application essentially or the part that contributes to the existing technology or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , Including a number of instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disk or optical disk and other media that can store program code .

Based on the above embodiments, the embodiments of the present application also provide an IoT platform, which is applied to the system shown in FIG. 1 and is used to perform the functions of the IoT platform in the above embodiments. Referring to FIG. 8, the IoT platform 800 may include: a communication interface 801, a processor 802, and a memory 803.

The processor 802 may be a central processing unit (CPU), a network processor (NP), or a combination of CPU and NP, and so on. The processor 802 may further include a hardware chip. The aforementioned hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof. The above-mentioned PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL) or any combination thereof. When the processor 802 realizes the above functions, it can be realized by hardware, and of course, it can also be realized by hardware executing corresponding software.

The communication interface 801 and the processor 802 are connected to each other. Optionally, the communication interface 801 and the processor 802 are connected to each other through a bus 804; the bus 804 may be a Peripheral Component Interconnect (PCI) bus or an extended industry standard structure (Extended Industry Standard). Architecture, EISA) bus, etc. The bus can be divided into address bus, data bus, control bus, etc. For ease of presentation, only one thick line is used in FIG. 8 to represent, but it does not mean that there is only one bus or one type of bus.

The memory 803 is coupled with the processor 802, and is used for storing programs and the like. Specifically, the program may include program code, and the program code includes computer operation instructions. The processor 802 executes the application program stored in the memory 803 to implement the operation of the IoT platform in the foregoing embodiment.

Specifically, when the IoT platform 800 implements the operation of the IoT platform in the foregoing embodiment, it may include:

The communication interface 801 is used to send and receive data, and to communicate and interact with other equipment or devices in the system;

The processor 802 is configured to execute a program stored in the memory 803, and when the program is executed, determine N terminal devices to be processed for the first service, and determine from the N terminal devices that support short distance P target terminal devices for communication, N terminal devices support the first service; and M relay devices that support the first service are determined, and the NFC coverage of each relay device in the M relay devices is relative to the first service. There is an intersection in an area, and the first area covers at least P target terminal devices; and controlling the communication interface 801 to send a first message to M relay devices. The first message includes indication information and service information of the first service, indicating The information is used to indicate that the service information of the first service is broadcast through short-range communication; and, a second message is sent to terminal devices other than the P target terminal devices among the N terminal devices, and the second message includes the service information of the first service. Exemplarily, the processor 802 and the communication interface 801 may also perform other possible operations performed by the IoT platform in the foregoing method embodiment, and details are not described herein again.

Based on the above embodiments, an embodiment of the present application also provides a relay device, which is used to implement the method or function of the relay device in the above embodiment, and the relay device may be the relay device in the above embodiment It can also be a device or chip integrated in the relay device described in the above embodiment. Referring to FIG. 9, the relay device 900 may include: a communication interface 901, a processor 902, and a memory 903. For example, when the relay device is a vehicle, the relay device may be a T-Box, or DC, or MDC, or OBU integrated in the vehicle.

The processor 902 may be a central processing unit (CPU), a network processor (NP), or a combination of CPU and NP, or the like. The processor 902 may further include a hardware chip. The aforementioned hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof. The above-mentioned PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL) or any combination thereof. When the processor 902 realizes the above functions, it can be realized by hardware, and of course, it can also be realized by hardware executing corresponding software.

The communication interface 901 and the processor 902 are connected to each other. Optionally, the communication interface 901 and the processor 902 are connected to each other through a bus 904; the bus 904 may be a Peripheral Component Interconnect (PCI) bus or an extended industry standard structure (Extended Industry Standard). Architecture, EISA) bus, etc. The bus can be divided into address bus, data bus, control bus, etc. For ease of representation, only one thick line is used in FIG. 9, but it does not mean that there is only one bus or one type of bus.

The memory 903 is coupled with the processor 902, and is used for storing programs and the like. Specifically, the program may include program code, and the program code includes computer operation instructions. The processor 902 executes the application program stored in the memory 903 to implement the operation of the relay device in the foregoing embodiment.

Specifically, when the relay device 900 implements the operation of the relay device in the foregoing embodiment, it may include:

The communication interface 901 is used to send and receive data, and to communicate and interact with other equipment or devices in the system;

The processor 902 is configured to execute a program stored in the memory 903, and when the program is executed, it controls the communication interface 901 to receive a first message sent by the IoT platform. The first message includes instruction information and a first message. The service information of the service, the indication information is used to instruct the relay device to broadcast the service information of the first service through short-range communication; the first message also includes the location information and moving speed of at least one of the P target terminal devices; and, According to the location information and moving speed of at least one terminal device among the P target terminal devices, determine the broadcast time and broadcast times for broadcasting the service information of the first service; and, according to the broadcast time and broadcast times, control the communication interface 901 to broadcast the first Business information of a business. Exemplarily, the processor 902 and the communication interface 901 may also perform other possible operations performed by the relay device in the foregoing method embodiment, and details are not described herein again.

Based on the above embodiments, the embodiments of the present application also provide a computer storage medium, the storage medium stores a software program, and when the software program is read and executed by one or more processors, any one or more of the above The method provided by the embodiment. The computer storage medium may include: U disk, mobile hard disk, read-only memory, random access memory, magnetic disk or optical disk and other media that can store program codes.

Based on the above embodiments, the embodiments of the present application also provide a chip, which includes a processor, which is used to implement the functions involved in any one or more of the above embodiments, such as acquiring or processing the information involved in the above methods or news. Optionally, the chip further includes a memory, and the memory is used for necessary program instructions and data executed by the processor. The chip can be composed of a chip, or it can include a chip and other discrete devices.

In the implementation process, each step in the method provided in this embodiment can be completed by an integrated logic circuit of hardware in the processor or instructions in the form of software. The steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware processor, or executed and completed by a combination of hardware and software modules in the processor.

It can be understood that the memory or storage unit in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electronic Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory. The volatile memory may be random access memory (RAM), which is used as an external cache. By way of exemplary but not restrictive description, many forms of RAM are available, such as static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (synchlink DRAM, SLDRAM) ) And direct memory bus random access memory (direct rambus RAM, DR RAM). It should be noted that the memories of the systems and methods described herein are intended to include, but are not limited to, these and any other suitable types of memories.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented by software, it can be implemented in the form of a computer program product in whole or in part. The computer program product includes one or more computer programs or instructions. When the computer program or instruction is loaded and executed on the computer, the process or function described in the embodiment of the present application is executed in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer program or instruction may be stored in a computer-readable storage medium, or transmitted through the computer-readable storage medium. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server integrating one or more available media. The usable medium may be a magnetic medium, such as a floppy disk, a hard disk, and a magnetic tape; it may also be an optical medium, such as a DVD; it may also be a semiconductor medium, such as a solid state disk (SSD).

The various illustrative logic units and circuits described in the embodiments of this application can be implemented by general-purpose processors, digital signal processors, application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, Discrete gates or transistor logic, discrete hardware components, or any combination of the above are designed to implement or operate the described functions. The general-purpose processor may be a microprocessor, and optionally, the general-purpose processor may also be any traditional processor, controller, microcontroller, or state machine. The processor can also be implemented by a combination of computing devices, such as a digital signal processor and a microprocessor, multiple microprocessors, one or more microprocessors combined with a digital signal processor core, or any other similar configuration achieve.

The steps of the method or algorithm described in the embodiments of the present application can be directly embedded in hardware, a software unit executed by a processor, or a combination of the two. The software unit can be stored in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM or any other storage medium in the field. Exemplarily, the storage medium may be connected to the processor, so that the processor can read information from the storage medium, and can store and write information to the storage medium. Optionally, the storage medium may also be integrated into the processor. The processor and the storage medium can be arranged in an ASIC, and the ASIC can be arranged in a terminal device. Optionally, the processor and the storage medium may also be arranged in different components in the terminal device.

These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment. The instructions provide steps for implementing functions specified in a flow or multiple flows in the flowchart and/or a block or multiple blocks in the block diagram.

Although the embodiments of the present application have been described in combination with specific features, it is obvious that various modifications and combinations can be made without departing from the spirit and scope of the embodiments of the present application. Correspondingly, this specification and drawings are merely exemplary descriptions of the embodiments of the present application defined by the appended claims, and are deemed to cover any and all modifications, changes, combinations or equivalents within the scope of the embodiments of the present application.

Claims

A communication method, characterized in that the method includes:

The IoT platform determines N terminal devices to be processed for the first service, and determines from the N terminal devices P target terminal devices that support short-range communication, and the N terminal devices support the first service ；

The IoT platform determines M relay devices supporting the first service, and the short-range communication of each relay device in the M relay devices covers at least one target terminal device among the P target terminal devices ；

The IoT platform sends a first message to the M relay devices, where the first message includes indication information and service information of the first service, and the indication information is used to instruct to broadcast the first service through short-range communication And, the IoT platform sends a second message to terminal devices other than the P target terminal devices among the N terminal devices, where the second message includes the business information of the first service;

Among them, N, M, and P are all integers.
The method of claim 1, wherein the IoT platform determining the N terminal devices comprises:

The IoT platform receives a third message from an application server, where the third message includes the information of the first area, the service information of the first service and the target terminal type, and the service information of the first service includes the first Business identity of the business;

The IoT platform obtains multiple terminal devices located in the first area according to the information of the first area;

The IoT platform obtains the service list supported by the multiple terminal devices and the types of the multiple terminal devices, and according to the service list supported by the multiple terminal devices and the types of the multiple terminal devices, from the The N terminal devices are determined from a plurality of terminal devices, the service list supported by the N terminal devices includes the identifier of the first service, the type of each terminal device in the N terminal devices and the target Match the type.
The method of claim 1, wherein the IoT platform determining the N terminal devices comprises:

The IoT platform receives a third message from an application server, where the third message includes the identifier of the first group and the service information of the first service, and the service information of the first service includes the service identifier of the first service;

The IoT platform obtains the N terminal devices belonging to the first group.
The method according to any one of claims 1 to 3, wherein the IoT platform determines from the N terminal devices P target terminal devices that support short-range communication, comprising:

The IoT platform obtains the communication capability information of the N terminal devices, and the N terminal devices include the first terminal device, and the communication capability information of the first terminal device is used to indicate whether the first terminal device Supporting short-distance communication, or indicating the public land mobile network PLMN list of the first terminal device that supports short-distance communication;

The IoT platform determines the P target terminal devices from the N terminal devices according to the communication capability information of the N terminal devices; the communication capability information of the target terminal device indicates that the target terminal device supports proximity Distance communication, or, the list of PLMNs supporting short-distance communication of the target terminal device includes the PLMN accessed by the target terminal device.
The method according to any one of claims 1 to 4, wherein the IoT platform determining the M relay devices includes:

The IoT platform obtains the mobile identities of the P target terminal devices, and the mobile identities of the target terminal devices are used to indicate that the target terminal device is in a mobile state or in a stationary state;

If the IoT platform determines that the P target terminal devices include M target terminal devices in a stationary state, then the M target terminal devices in a stationary state are determined as the M relay devices.
The method according to claim 5, wherein the instruction information is further used to instruct to process the service information of the first service.
The method according to claims 1 to 4, wherein the method further comprises:

According to the information of the first area, the communication capability information of at least one terminal device, the list of services supported by the at least one terminal device, and the mobile identity of the at least one terminal device, the IoT platform obtains information from the at least one terminal device. The M relay devices are determined in, the at least one terminal device is a terminal device other than the P target terminal devices;

Wherein, the at least one terminal device includes a second terminal device, and the mobile identifier of the second terminal device is used to indicate that the second terminal device is in a mobile state or in a stationary state; the communication capability information of the second terminal device It is used to indicate whether the second terminal device supports near field communication, or indicates the PLMN list of the second terminal device that supports near field communication; if the second terminal device supports the near field communication, the The communication capability information of the second terminal device includes the NFC coverage area of the second terminal device;

The M relay devices are terminal devices in a static state, and the service list supported by the M relay devices includes the identifier of the first service.
The method according to claim 7, wherein before the IoT platform determines the M relay devices from the at least one terminal device, the method further comprises:

The IoT platform determines that no terminal device in a stationary state is included in the P target terminal devices.
The method according to any one of claims 1 to 8, characterized in that:

The short-range communication of the M relay devices completely covers the target terminal devices in the moving state among the P target terminal devices.
The method according to claim 9, wherein if the short-range communication of the M relay devices does not completely cover the target terminal device in a moving state, the first message further includes the Location information and moving speed of at least one of the target terminal devices in the moving state.
The method according to any one of claims 1 to 10, characterized in that:

The first message is a multicast message or a unicast message; and/or,

The second message is a unicast message.
A communication method, characterized in that the method includes:

The relay device receives a first message sent by the IoT platform, where the first message includes indication information and service information of the first service, and the indication information is used to instruct to broadcast the service information of the first service through short-range communication The first message also includes location information and moving speed of at least one target terminal device in the P target terminal devices;

The relay device determines the broadcast time and the number of broadcasts for broadcasting the service information of the first service according to the location information and the moving speed of at least one terminal device among the P target terminal devices;

The relay device broadcasts the service information of the first service according to the broadcast time and the number of broadcasts.
The method according to claim 12, wherein the first message includes location information and moving speed of each target terminal device in the P target terminal devices;

The relay device determining the broadcast time and the number of broadcasts for broadcasting the service information of the first service according to the location information and moving speed of the P target terminal devices includes:

The relay device determines the third terminal device furthest from the relay device according to the location information of each of the P target terminal devices, and according to the location information of the third terminal device and The moving speed determines the broadcasting time and broadcasting times of broadcasting the service information of the first service.
The method according to claim 13, wherein the first message includes position information and moving speed of a third terminal device among the P target terminal devices; the third terminal device is the P target terminal devices. The target terminal device that is the farthest from the relay device among target terminal devices;

The relay device determines the broadcast time and the number of broadcasts for broadcasting the service information of the first service according to the location information and the moving speed of at least one terminal device among the P target terminal devices, including:

The relay device determines the broadcast time and the number of broadcasts for broadcasting the service information of the first service according to the location information and the moving speed of the third terminal device.
A device, characterized in that the device includes a processor, a memory, and instructions stored on the memory and executable on the processor, and when the instructions are executed, the device executes The method of any one of claims 1 to 11.
A device, characterized in that the device includes a processor, a memory, and instructions stored on the memory and executable on the processor, and when the instructions are executed, the device executes The method of any one of claims 12 to 14.
An IoT platform, characterized by comprising the device according to claim 15.
A relay device, characterized by comprising the device according to claim 16.
A communication system, characterized by comprising the IoT platform according to claim 17 and one or more relay devices according to claim 18.
A computer-readable storage medium, characterized by comprising instructions, which when run on a computer, causes the computer to execute the method according to any one of claims 1 to 14.
A computer program product, characterized in that, when it runs on a computer, it causes the computer to execute the method according to any one of claims 1 to 14.