WO2024061034A1

WO2024061034A1 - Communication method and communication apparatus

Info

Publication number: WO2024061034A1
Application number: PCT/CN2023/117905
Authority: WO
Inventors: 蒋钟寅; 周艳; 郑博文; 茆意伟; 王键; 程型清; 高磊
Original assignee: 华为技术有限公司
Priority date: 2022-09-21
Filing date: 2023-09-11
Publication date: 2024-03-28
Also published as: CN117793675A

Abstract

Embodiments of the present application provide a communication method and a communication apparatus. The method comprises: a discovery device receives broadcast information from a broadcast device; the discovery device sends at least one query request frame to the broadcast device according to the broadcast information and filtering indication information of at least one query request, the query request frame having one-to-one correspondence to the filtering indication information of the query request; and the discovery device receives at least one query response frame from the broadcast device, the query response frame having one-to-one correspondence to filtering indication information of a query response. According to the communication method and the communication apparatus of the present application, broadcast frames for interaction among communication devices can be filtered to improve the communication efficiency of the communication devices, thereby exerting the discovery performance of the communication devices.

Description

Communication method and communication device

This application claims priority to the Chinese patent application filed with the China Patent Office on September 21, 2022, with application number 202211155020.7 and application title "Communication Method and Communication Device", the entire content of which is incorporated into this application by reference.

Technical field

The embodiments of the present application relate to the field of communication technology, and in particular, to a communication method and a communication device.

Background technique

With the development of Internet and IoT technology, a wide variety of communication device applications have emerged. Applications on these communication devices often require information interaction with corresponding applications on surrounding devices. Currently, short-range communication technology is a commonly used method of communication between communication devices, such as Bluetooth or wireless fidelity (WiFi). In order to meet the needs of users for short-distance communication technology, the Sparklink Alliance was established and is committed to promoting a new generation of wireless short-distance communication technology innovation and industrial ecology.

Therefore, how to improve the efficiency of short-distance communication of applications on communication devices and give full play to the discovery performance of communication devices is an urgent problem that needs to be solved.

Contents of the invention

The embodiments of the present application provide a communication method and a communication device, which can improve the efficiency of short-range communication of a communication device and give full play to the discovery performance of the communication device.

In a first aspect, a communication method is provided, including: a discovery device receives broadcast information from a broadcast device; the discovery device sends at least one query request frame to the broadcast device based on the broadcast information and filtering indication information of at least one query request, The query request frame corresponds one-to-one to the filtering instruction information of the query request; the discovery device receives at least one query response frame from the broadcast device, and the query response frame corresponds to the filtering instruction information of the query response one-to-one.

For example, the broadcast information may be queryable broadcast information, and the queryable broadcast information includes queryable basic broadcast information and queryable extended broadcast information. The filtering instruction information of the query request may also be called the filtering conditions of the query request, and this application does not limit this name.

In some implementations, the filtering indication information of the query request may be preconfigured.

Based on the above solution, the discovery device can filter the received broadcast information in order to send filtered query request frames, which improves the accuracy of communication interaction between the discovery device and the broadcast device, and improves the efficiency of communication transmission.

With reference to the first aspect, in some implementations of the first aspect, the discovery device sends at least one query request frame to the broadcast device based on the broadcast information and the filtering indication information of the at least one query request, including: the discovery device in the first Send at least one query request frame within an offset based on the broadcast information and at least one filtering indication information of the query request. The offset of the query request includes the first offset. The offset of the query request is used to Indicates the starting time of sending the query request frame.

Based on the above solution, the discovery device filters the broadcast information within a certain filtering processing time (first offset) in order to determine the query request frame to request more accurate data content.

Combined with the first aspect, in some implementations of the first aspect, the filtering instruction information of the query request includes at least one of the following: device address, device name, service universal unique identifier UUID, requested service UUID, service data, manufacturer data.

Based on the above solution, the broadcast information can be filtered according to the filtering instruction information of the above query request. The filtering instruction information of the above query request can also be composed of the AND/OR/NOT combination of single or multiple conditions in the device address, device name, service UUID, service data, manufacturer data and other information. The discovery device supports filtering broadcast information and sends corresponding query request frames, thereby improving the efficiency of data content transmission between the discovery device and the broadcast device.

In conjunction with the first aspect, in some implementations of the first aspect, the query request frame includes a data type field, and the data type field includes one of query request information and query response information.

In conjunction with the first aspect, in some implementations of the first aspect, the query request information includes the requested service UUID.

For example, the requested service UUID may be included in the query request information of the query request frame.

In conjunction with the first aspect, in some implementations of the first aspect, the query request frame includes a data type field, and the data type field includes the request service UUID.

For example, the requested service UUID may be included in the data type field of the query request frame.

With reference to the first aspect, in some implementations of the first aspect, the broadcast information includes extended broadcast information, and the extended broadcast information includes at least one of the following: an offset of the query request, an offset of the query response, the The first offset, the offset of the query response is used to indicate the starting moment of receiving the query response frame.

It should be understood that the offset of the query request, the offset of the query response and the first offset can be configured to the discovery device through broadcast information. The extended broadcast information may be queryable extended broadcast information.

In one implementation, the offset of the query request, the offset of the query response, and the first offset may be system defaults.

In a second aspect, a communication method is provided, including: a broadcast device sends broadcast information to a discovery device; the broadcast device receives at least one query request frame from the discovery device, and the query request frame and the filtering indication information of the query request are one by one. Correspondingly; the broadcast device sends at least one query response frame to the discovery device based on at least one query request frame and at least one query response filtering indication information, and the query response frame corresponds one-to-one with the query response filtering indication information.

For example, the broadcast information may be queryable broadcast information, and the queryable broadcast information includes queryable basic broadcast information and queryable extended broadcast information. The filtering instruction information of the query response may also be called the filtering condition of the query response, and this application does not limit this name.

In one implementation, the filtering indication information of the query response may be preconfigured.

Based on the above solution, the broadcast device can filter the received query request frame in order to send the filtered query response frame, which improves the accuracy of communication interaction between the discovery device and the broadcast device and improves the efficiency of communication transmission.

In combination with the second aspect, in certain implementations of the second aspect, the broadcasting device sends at least one query response frame to the discovery device based on the filtering indication information of at least one of the query request frames and at least one query response, including: the broadcasting device sends at least one query response frame to the discovery device based on the filtering indication information of the at least one of the query request frames and at least one query response within the second offset, the offset of the query response includes the second offset, and the offset of the query response is used to indicate the starting time of sending the query response frame.

Based on the above solution, the broadcast device filters the query request frame within a certain filtering processing time (the second offset) in order to determine the query response frame to feed back more accurate data content.

Combined with the second aspect, in some implementations of the second aspect, the filtering instruction information of the query response includes at least one of the following: device address, device name, service universal unique identifier UUID, requested service UUID, service data, manufacturer data.

Based on the above solution, the query request frame can be filtered according to the filtering instruction information of the above query response. The filtering instruction information of the above query response can also be composed of the AND/OR/NOT combination of single or multiple conditions in the device address, device name, service UUID, service data, manufacturer data and other information. The broadcast device supports filtering query request frames and sends corresponding query response frames, thereby improving the efficiency of data content transmission between the discovery device and the broadcast device.

Combined with the second aspect, in some implementations of the second aspect, the query request frame includes a data type field, and the data type field includes one of query request information and query response information.

Combined with the second aspect, in some implementations of the second aspect, the query request information includes the requested service UUID.

Combined with the second aspect, in some implementations of the second aspect, the query request frame includes a data type field, and the data type field includes the request service UUID.

In conjunction with the second aspect, in some implementations of the second aspect, the broadcast information includes extended broadcast information, and the extended broadcast information includes at least one of the following: an offset of the query request, an offset of the query response, the The second offset, the offset of the query request is used to indicate the starting time of receiving the query request frame.

It should be understood that the offset of the query request, the offset of the query response and the second offset can be configured to the discovery device through broadcast information. The extended broadcast information may be queryable extended broadcast information.

In an implementation manner, the offset of the query request, the offset of the query response, and the second offset may be system defaults.

In a third aspect, a communication system is provided, including: a discovery device and a broadcast device. The discovery device receives broadcast information from the broadcast device; the discovery device sends a request to the broadcast device based on the broadcast information and the filtering instruction information of at least one query request. Send at least one query request frame, which corresponds one-to-one to the filtering indication information of the query request; the broadcast device sends at least one query to the discovery device based on the at least one query request frame and the filtering indication information of at least one query response. Response frame, the query response frame corresponds to the filtering instruction information of the query response one-to-one.

With reference to the third aspect, in some implementations of the third aspect, the discovery device sends at least one query request frame to the broadcast device according to the broadcast information and the filtering indication information of the at least one query request, including: the discovery device in the first Send at least one query request frame within an offset based on the broadcast information and at least one filtering indication information of the query request. The offset of the query request includes the first offset. The offset of the query request is used to Indicates the starting time when the discovery device sends the query request frame.

In combination with the third aspect, in certain implementations of the third aspect, the broadcasting device sends at least one query response frame to the discovery device based on the filtering indication information of the at least one query request frame and the at least one query response, including: the broadcasting device sends at least one query response frame to the discovery device based on the filtering indication information of the at least one query request frame and the at least one query response within a second offset, the offset of the query response includes the second offset, and the offset of the query response is used to indicate the starting time when the broadcasting device sends the query response frame.

Combined with the third aspect, in some implementations of the third aspect, the filtering instruction information of the query request includes at least one of the following: device address, device name, service universal unique identifier UUID, requested service UUID, service data, manufacturer Data; the filtering instruction information of the query response includes at least one of the following: device address, device name, service universal unique identifier UUID, requested service UUID, service data, and manufacturer data.

Combined with the third aspect, in some implementations of the third aspect, the query request frame includes a data type field, and the data type field includes one of query request information and query response information.

Combined with the third aspect, in some implementation manners of the third aspect, the query request information includes the requested service UUID.

Combined with the third aspect, in some implementations of the third aspect, the query request frame includes a data type field, and the data type field includes the request service UUID.

Combined with the third aspect, in some implementations of the third aspect, the broadcast information includes extended broadcast information, and the queryable extended broadcast information includes at least one of the following: an offset of the query request, an offset of the query response , the first offset, and the second offset.

In a fourth aspect, a communication device is provided, including: a module for performing the method in the first aspect and any possible implementation thereof, or a module for performing the method in the second aspect and any possible implementation thereof. Method module.

A fifth aspect provides a communication device, including: a processor coupled to a memory, the memory is used to store a computer program, and the processor is used to run the computer program, so that the communication device performs the above-mentioned first aspect and any of the above. A method in a possible implementation manner, or causing the communication device to perform the method in the above second aspect and any possible implementation manner thereof.

In conjunction with the fifth aspect, in some implementations of the fifth aspect, the device further includes one or more of the memory and a transceiver, the transceiver being used to receive signals and/or send signals.

In a sixth aspect, a computer-readable storage medium is provided. The computer-readable storage medium includes a computer program or instructions. When the computer program or instructions are run on a computer, it makes possible as in the first aspect and any of the instructions thereof. The method in the implementation is executed, or the method in the second aspect and any possible implementation thereof is executed.

In a seventh aspect, a computer program product is provided. The computer program product includes a computer program or instructions. When the computer program or instructions are run on a computer, the computer program or instructions perform as in the first aspect and any possible implementation manner thereof. The method is executed, or causes the method in the second aspect and any possible implementation thereof to be executed.

An eighth aspect provides a computer program that, when run on a computer, causes the method in the first aspect and any of its possible implementations to be executed, or causes the method in the second aspect and any of its possible implementations to be executed. Methods in possible implementations are executed.

Description of the drawings

Figure 1 is a schematic diagram of a new star flash short-range protocol architecture provided by an embodiment of the present application.

Figure 2 is a schematic diagram of a wireless short-range communication scenario application provided by an embodiment of the present application.

Figure 3 is a schematic diagram of a new short-range star flash protocol architecture provided by an embodiment of the present application.

FIG. 4 is a structural diagram of a communication device provided by an embodiment of the present application.

Figure 5 is a schematic diagram of a communication method provided by an embodiment of the present application.

Figure 6 is a schematic flow chart of a communication method 600 provided by an embodiment of the present application.

Figure 7 is a schematic diagram of a discovery process provided by an embodiment of the present application.

Figure 8 is a schematic diagram of queryable broadcast filtering provided by an embodiment of the present application.

Figure 9 is a schematic diagram of filtering query request messages provided by an embodiment of the present application.

Figure 10 is a schematic diagram of a discovery device filtering process provided by an embodiment of the present application.

Figure 11 is a schematic diagram of a device disclosure information data structure provided by an embodiment of the present application.

Figure 12 is a schematic flow chart of a communication method 1200 provided by an embodiment of the present application.

Figure 13 is a schematic block diagram of a communication device 1300 provided by an embodiment of the present application.

Figure 14 is a schematic block diagram of a chip system 1400 provided by an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

The terminology used in the following examples is for the purpose of describing specific embodiments only and is not intended to limit the application. As used in the specification and appended claims of this application, the singular expressions "a", "an", "said", "above", "the" and "the" are intended to also Expressions such as "one or more" are included unless the context clearly indicates otherwise. It should also be understood that in the following embodiments of this application, "at least one" and "one or more" refer to one, two or more than two. The term "and/or" is used to describe the relationship between associated objects, indicating that there can be three relationships; for example, A and/or B can mean: A exists alone, A and B exist simultaneously, and B exists alone, Where A and B can be singular or plural. The character "/" generally indicates that the related objects are in an "or" relationship.

Reference in this specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure or characteristic described in connection with the embodiment is included in one or more embodiments of the application. Therefore, the phrases "in one embodiment", "in some embodiments", "in other embodiments", "in other embodiments", etc. appearing in different places in this specification are not necessarily References are made to the same embodiment, but rather to "one or more but not all embodiments" unless specifically stated otherwise. The terms “including,” “includes,” “having,” and variations thereof all mean “including but not limited to,” unless otherwise specifically emphasized.

The communication method provided by the embodiment of the present application can be used in any communication system, which may include short-range communication systems, cellular communication systems (for example, long term evolution (LTE) systems, new radio access technology, NR)), global interoperability for microwave access (WiMAX) communication systems and various types of next-generation communication systems (such as the sixth generation (the sixth generation, 6G) mobile communication systems), etc., are not allowed limit. Among them, the short-range communication system can be a Bluetooth communication system, a low-power Bluetooth communication system, a wireless-fidelity (Wi-Fi) communication system, and various types of next-generation short-range communication systems, etc., without limitation.

Among them, the communication system can include multiple communication devices, and each communication device can adopt the Star Flash new short-range protocol as shown in Figure 1 to communicate through wireless short-range communication technology to achieve information sharing and wireless transmission of services. It then carries scenario applications such as tablet computer 210, smart screen 220, personal computer 230, smart watch 240, Bluetooth headset 250, smart phone 260 and smart car 270 as shown in Figure 2 and meets the performance requirements of each communication device.

Among them, the communication device can be any device with sending and receiving functions, including but not limited to cellular phones, cordless phones, session initiation protocol (session initiation protocol, SIP) phones, smart phones, wireless local Wireless local loop (WLL) station, personal digital assistant (PDA), handheld device with wireless communication function, computing device, vehicle-mounted device, wearable device, drone device, Internet of Things or Internet of Vehicles communications equipment, other devices connected to wireless modems, etc.

The communication device can also be a communication device in virtual reality (VR), a communication device in augmented reality (AR), a communication device in industrial control (such as smart manufacturing), or driverless driving Communication equipment in (self driving), communication equipment in remote medical (remote medical), communication equipment in smart grid (smart grid), communication equipment in smart city (smart city), communication equipment in smart home (smart home) Communication equipment, etc.

The communication device may also be a personal portable communication device, a computer peripheral device, and various household or industrial electrical devices, including but not limited to a smart phone, a smart screen, a smart speaker (such as an artificial intelligence (AI) speaker, a high fidelity (HiFi) speaker), a smart sensor, a television wireless headset, a VR headset, a tablet computer, a display, a camera, a laptop computer, a vehicle-mounted computer, a vehicle-mounted terminal (such as a microphone, speakers, etc.), projectors, printers, smart wristbands, smart watches, smart glasses, smart cars, smart lathes, smart monitoring equipment, etc.

The communication device shown in Figure 2 can host a variety of applications, and two-way broadcast communication can be performed between different communication devices to improve the perception of peripheral devices and achieve more efficient information interaction capabilities. For example, application A on the smart phone 260 can request more detailed data information from the application A on the peripheral device PC 230. When the peripheral device of the smart phone 260 is changed to the smart car 270, the application on the smart phone 260 A can request more detailed data information from application A on the peripheral smart car 270 . That is to say, when there are a large number of communication devices or the scene in which the communication devices are located is constantly changing, the communication method provided by the embodiments of the present application can more conveniently realize data interaction between the communication device and the application program on the peripheral device.

The embodiments of the present application do not place any special restrictions on the specific form of the communication device. The types of each communication device in the communication system can be partially the same, completely identical, or completely different. In addition, in the embodiment of the present application, the communication system may include at least two communication devices. The at least two communication devices may include the discovery device and the broadcast device in the following embodiments. There may be one or more discovery devices, and the broadcast device may also be There may be one or more. In the following embodiments, a discovery device and a broadcast device are taken as examples to describe the communication method and communication device provided by this application.

As shown in Figure 1, Star Flash's new short-range protocol architecture can include access layer, host (Host) and application (application, APP). Among them, the access layer can support multiple access technologies at the same time. Above the access layer is a normalized host protocol, and the host can dynamically schedule the access technologies supported by the access layer according to the corresponding needs of the application.

Specifically, as shown in Figure 3, the host may include a basic application layer and a basic service layer.

Among them, as shown in Figure 3, the basic application layer can be responsible for undertaking different business requirements of upper-layer applications (for example, business requirement 1, business requirement 2,..., business requirement 5, etc.), and based on inter-layer primitives, ports ( One or more of port), application identification (Application Identification, AID), Internet Protocol (Internet Protocol, IP) address completes the routing of data to the basic service layer.

Among them, the port can be a channel of the basic application layer. The basic application layer can register a port for the application's business and send the business data to the basic service layer through the port.

Among them, the application identifier can be the mapping identifier of the business function set of the application layer and the quality of service (QoS) flow. Different sets of business functions can be distinguished by business identification (BID). According to different classifications of services, the basic application layer may include multiple different business function sets (or described as business modules or business frameworks), and different business function sets may include classified data processing for the business.

For example, as shown in Figure 3, the basic application layer may include a basic communication framework, a universal perception framework, a universal video framework, a universal audio framework, a universal data framework, a vehicle control framework, etc. Among them, the general perception framework can include the processing of sensory data; the general video framework can include the processing of video, such as encoding and decoding; the general audio framework can include the processing of audio, such as encoding and decoding; and the general data framework can include file processing. Data processing, such as encryption and compression; the vehicle control framework can include the processing of vehicle control data.

Among them, as shown in Figure 3, the basic service layer can include multiple modules or functional units, including but not limited to device discovery module, service discovery module, connection management module, QoS management module, security management module, measurement management module, multi-domain Coordination module, fifth generation mobile communication technology (5G) integration module, etc., to realize the creation, addition, deletion, release, etc. of transmission channel (TC), as well as logical channel (LC) ) control (such as access technology selection) and other functions, and undertake the business requirements of the basic application layer (such as traffic, rate, sound quality, resolution). The basic service layer can be compatible with a variety of access layer technologies supported by the access layer, such as the above-mentioned SLB access technology, SLE access technology and other access technologies, and retains the ability to be compatible with more access technologies in the future.

Specifically, the device discovery module can be used to discover devices when there is no connection to the device. The service discovery module can be used to discover and operate services on the device. The connection management module can be used to manage transmission channels, including creation/addition/deletion/release, etc. The QoS management module can be used to manage and negotiate transmission QoS. The security management module can be responsible for the secure connection of the basic service layer. The measurement management module can be used to configure underlying measurement and scheduling for power control, etc. The multi-domain coordination module can realize information interaction between domains in the scenario where multiple domains (subnets) exist, and achieve interference avoidance and load balancing between multiple domains. The 5G convergence module can be used to establish a channel with cellular 5G remote management capabilities, and implement devices with cellular 5G remote control capabilities through authentication and authentication mechanisms.

Among them, the transmission channel can be a channel of the basic service layer, and the logical channel (or described as a logical link) can be a channel of the access layer. One logical channel corresponds to one access technology. When a communication device needs to send or broadcast data, the basic application layer of the communication device Data can be sent to the basic service layer through the port, the basic service layer can send data to the access layer through the transmission channel, and the access layer can send or broadcast data through the logical channel. When a communication device needs to receive or scan data, the access layer of the communication device can send the received or scanned data to the basic service layer through the logical channel, and the basic service layer can send the data to the basic application through the transmission channel and port. layer.

For example, as shown in Figure 3, the basic application layer can send non-IP data carrying AID to the basic service layer through the port, or it can send IP data carrying IP quintuples through the port. To the basic service layer. The basic service layer can be based on the transmission control adaptation protocol and send the data sent by the basic application layer to the access layer through the transmission channel; it can also be based on the IP protocol and send the data sent by the basic application layer to the access layer through the transmission channel; or Data transparent transmission can be used to send data sent by the basic application layer to the access layer through the transmission channel. Data transmission based on the transmission control adaptation protocol can be determined through ultra path interconnect (UPI), or data transmission based on the IP protocol, or data transmission using data transparent transmission.

In addition, the transmission of the basic service layer can be divided into control plane transmission and business plane transmission. Correspondingly, the transmission channel of the basic service layer can include a control channel and a business channel. The control channel is used to transmit control plane data, and the business channel is used to transmit control plane data. For transmitting business side data.

The service channels may include unicast service channels, multicast service channels and broadcast service channels. The unicast service channel is a service channel used to transmit unicast services and can realize point-to-point transmission. The multicast service channel is a service channel used to transmit multicast services. It can realize point-to-group transmission. It has feedback (ack) at the bottom layer and has a certain underlying reliability. The broadcast service channel is a service channel used to transmit broadcast services. It can achieve connectionless transmission. There is no feedback (ack) at the bottom layer and requires multiple transmissions to ensure reliability.

It should be noted that one or more ports of the basic application layer may correspond to the same transmission channel of the basic service layer, and one or more transmission channels of the basic service layer may correspond to the same logical channel of the access layer. In addition, logical channels are the basis for establishing transmission channels in the basic service layer. Only after the logical channels are successfully established can the transmission channels of the basic service layer be available.

Among them, as shown in Figure 3, the access layer can be responsible for the processing of the underlying logical channels, such as the establishment, reconfiguration, deletion, etc. of logical channels, to undertake the business needs of the basic service layer (such as reliable data, real-time data, etc.). Among them, logical channels can be used to transmit services between two communication devices. The access layer can include a variety of access technologies, including but not limited to the access technology of Sparklink basic (SLB) short-range wireless communication system, Sparklink low energy (SLE) short-range wireless communication System access technology and other access technologies, such as Bluetooth low energy (BLE) technology, other StarLight Alliance access technologies in the future, etc.

For example, as shown in Figure 3, the access layer may include a data link layer and a physical layer. The data link layer can be used to implement resource management, access control, data segmentation, cascading, reordering and other functions to ensure reliable transmission of data. The physical layer can use the transmission medium to provide physical connections for the data link layer to achieve transparent transmission of bit streams. In some embodiments, the data link layer may also include a link control layer and a media access layer. The link control layer is mainly based on the links established between nodes, and interacts with the link control protocol (LCP) on the control link to perform functions such as physical/logical link management and device behavior control. The media access layer is responsible for allocating wireless resources and providing data transmission services for the link control layer.

Optionally, for a communication device that supports two access technologies at the same time (such as supporting both SLB access technology and SLE access technology), its access layer can implement SLB access and SLE access respectively through different modules. enter.

Based on the above description, the host protocol including the basic application layer and the basic service layer (or described as an upper layer protocol) can be adapted to the underlying access layer to support the needs of different services. Specifically, the host protocol can be provided to initiate a set of business functions. business requests, and transmit and control business data.

During specific implementation, the various layers of the communication device using the protocol architecture shown in Figure 1 or Figure 3, such as the basic application layer, basic service layer, and access layer, can adopt the composition structure shown in Figure 4, or include Figure 4 parts shown. Figure 4 is a schematic diagram of the composition of a communication device 400 provided by an embodiment of the present application. The communication device 400 can be a basic application layer or a chip or a system-on-chip in the basic application layer; it can also be a basic service layer or a basic service layer. A chip or a system on a chip; it may also be an access layer or a chip or a system on a chip in the access layer. As shown in FIG. 4 , the communication device 400 includes a processor 401 , a transceiver 402 and a communication line 403 .

Further, the communication device 400 may also include a memory 404. The processor 401, the memory 404 and the transceiver 402 may be connected through a communication line 403.

Among them, the processor 401 is a central processing unit (CPU), a general-purpose processor, a network processor (NP), a digital signal processing (DSP), a microprocessor, a microcontroller, Programmable logic device (PLD) or any combination thereof. The processor 401 can also be other devices with processing functions, such as circuits, devices or software modules, without limitation.

Transceiver 402, used to communicate with other devices or other communication networks. The other communication network may be Ethernet, wireless access network (radio access network, RAN), wireless local area networks (wireless local area networks, WLAN), etc. Transceiver 402 may be a module, a circuit, a transceiver, or any device capable of communicating.

The communication line 403 is used to transmit information between various components included in the communication device 400 .

Memory 404, used to store instructions. Wherein, the instructions may be computer programs.

Among them, the memory 404 can be a read-only memory (ROM) or other types of static storage devices that can store static information and/or instructions, or it can be a random access memory (random access memory, RAM) or other types of static storage devices that can store static information and/or instructions. Other types of dynamic storage devices that store information and/or instructions can also be electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD- ROM) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, etc., are not restricted.

It should be noted that the memory 404 may exist independently of the processor 401 or may be integrated with the processor 401. The memory 404 can be used to store instructions or program codes or some data. The memory 404 may be located within the communication device 400 or outside the communication device 400, without limitation. The processor 401 is configured to execute instructions stored in the memory 404 to implement the communication method provided by the following embodiments of the application.

In one example, the processor 401 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 4 .

As an optional implementation manner, the communication device 400 includes multiple processors. For example, in addition to the processor 401 in FIG. 4, it may also include a processor 407.

As an optional implementation manner, the communication device 400 also includes an output device 405 and an input device 406. For example, the input device 406 is a device such as a keyboard, a mouse, a microphone, or a joystick, and the output device 405 is a device such as a display screen, a speaker, or the like.

It should be noted that the communication device 400 may be a desktop computer, a portable computer, a network server, a mobile phone, a tablet computer, a wireless terminal, an embedded device, a chip system or a device with a similar structure as shown in Figure 4 . In addition, the composition structure shown in Figure 4 does not constitute a limitation of the communication device. In addition to the components shown in Figure 4, the communication device may include more or less components than shown in the figure, or combine certain components. , or a different component arrangement.

In the embodiment of the present application, the chip system may be composed of a chip, or may include a chip and other discrete devices.

In addition, actions, terms, etc. involved in various embodiments of this application can be referred to each other and are not limited. In the embodiments of this application, the name of the message exchanged between the various devices or the name of the parameters in the message is just an example, and other names may also be used in the specific implementation without limitation.

With the development of science and technology, communication devices can host a variety of applications, and applications on different communication devices need to exchange information or data. In this scenario, a communication connection usually needs to be established first before data can be exchanged. Interaction. When there are a large number of peripheral devices that the communication device needs to interact with, or the scene where the communication device is located is constantly changing, the efficiency of data interaction will be greatly reduced. Therefore, in response to the above problems, embodiments of the present application provide a communication method and a communication device, which can avoid the waste of resources caused by frequent establishment of connections between communication devices and at the same time improve the communication efficiency between applications on the communication devices so as to fully Leverage the discovery capabilities of communication devices.

To facilitate understanding, Figure 5 shows a schematic diagram of a communication method. For example, this method can be applied to discovery devices and broadcast devices. This method is described in detail below.

Broadcast devices can broadcast basic broadcast frames and extended broadcast frames. Both basic broadcast frames and extended broadcast frames can carry data. Extended broadcast frames include queryable extended broadcast frames and non-queryable extended broadcast frames, and basic broadcast frames include queryable basic broadcast frames and non-queryable basic broadcast frames. The broadcast device first sends the basic broadcast frame and then the extended broadcast frame. Discovery devices can receive basic broadcast frames and extended broadcast frames sent by broadcasting devices. After the discovery device receives the queryable extended broadcast frame, the discovery device can send a query request frame to the broadcast device to request more data. After receiving the query request frame, the broadcast device can reply with a query response frame. The query response frame may include data requested by the discovery device. When the discovery device receives a non-queryable extended broadcast frame, the discovery device does not need to send a query request frame. The access layer of the discovery device can report the data content already carried in the basic broadcast frame and the non-queryable extended broadcast frame layer by layer.

The broadcast device can receive query request frames within the receiving window. The query request frames can be multiple identical query request frames sent by the same discovery device, or multiple different query request frames sent by the same discovery device, or It can be query request frames sent by multiple different discovery devices. The broadcast device may send a query response frame, which may be one or more query response frames replied to one discovery device, or may be query response frames fed back separately to multiple discovery devices. Queryable extended broadcast frame It can include the offset of the query request configured in advance, the offset of the query response, the maximum length of the request, the number of requested windows, etc. The discovery device can send a query request frame at the start time of the query request window, and the broadcast device can send a query response frame at the start time of the query response window. The query request message may include one or more query request frames, and the query response message may include one or more query response frames.

Figure 5 exemplarily shows the discovery process of a broadcast device and a discovery device. The specific process is as follows:

1. The broadcast device sends basic broadcast frames and extended broadcast frames.

For example, there may be one or more basic broadcast frames, and the time interval between the sending start times of each two adjacent basic broadcast frames is the interval of the basic broadcast frames. For example, in Figure 5, the interval between the sending start time of basic broadcast frame 2 and the sending start time of basic broadcast frame 1 is the basic broadcast frame interval.

2. The discovery device receives basic broadcast frames and/or extended broadcast frames.

For example, both the basic broadcast frame and the extended broadcast frame include data. The discovery device can first receive the basic broadcast frame. When the data in the basic broadcast frame does not meet the needs of the discovery device, the discovery device can then receive the extended broadcast frame to obtain the data in the extended broadcast frame. For example, the discovery device opens a discovery window and receives basic broadcast frames and extended broadcast frames within the discovery window.

For example, the extended broadcast frame may include the offset of the query request and the number of request windows configured in advance. When the discovery device receives the queryable extended broadcast frame and the data in the queryable extended broadcast frame still does not meet the needs of the discovery device, the discovery device can use the offset of the query request configured in the queryable extended broadcast frame. One or more query request windows, send one or more query request frames. After the discovery device receives the non-queryable extended broadcast frame, the discovery device will not send a query request frame, and the discovery process ends.

3. The broadcast device receives the query request frame and sends the query response frame.

For example, when the broadcast device sends a queryable extended broadcast frame, the receiving window will be opened to receive the query request frame sent by the sending device. The extended broadcast frame may include the offset of the query response and the number of query response windows configured in advance. After the broadcast device receives the query request frame within the reception window, it can send the query response frame through one or more query response windows after querying the offset of the query response configured in the extended broadcast. A query response frame may include responses from one or more discovered devices.

4. The discovery device receives the query response frame.

For example, when the discovery device receives a query response frame sent by the broadcast device, the discovery process is completed. The broadcast device can continue to send the basic broadcast frame 4 as shown in Figure 5. The interval between the start time of sending the basic broadcast frame 1 and the start time of sending the basic broadcast frame 4 is the broadcast cycle interval of the broadcast device.

Figure 5 above introduces a mutual discovery process between a broadcast device and a discovery device. The process 500 can realize data transmission without establishing a connection between the discovery device and the broadcast device. When the discovery device has a large number of peripheral devices that need to exchange data, or the discovery device is in a mobile state, resource consumption caused by frequent establishment of connections between the discovery device and peripheral devices can be avoided, and the efficiency of data transmission between devices can be improved.

When the discovery device needs to obtain more data, the discovery device can request more data content by sending a query request frame to the broadcast device. However, since communication devices can carry multiple applications, querying the information in the broadcast is also very complicated. In order to further improve the efficiency of data transmission between communication devices, Figure 6 shows a communication method provided by the present application. schematic flow chart. Taking a discovery device and a broadcast device as an example, method 600 will be described in detail below.

S601: The broadcast device pre-configures the filtering conditions of the query response.

S602: Discover that the device pre-configures the filtering conditions of the query request.

For example, the above filtering conditions may also be called filtering instruction information, and this application does not limit this name. Filter conditions can be pre-configured for broadcast devices and discovery devices respectively. The filter conditions can be one or more of the device address, device name, service universal unique identifier (UUID), service data, manufacturer data and other information.

For example, for a broadcast device, the basic application layer of the broadcast device can configure a query response filtering policy according to business needs, and convert the query response filtering policy into a query response filtering command that the access layer can understand at the basic service layer. . For discovery devices, the basic application layer of the discovery device can configure the query request filtering policy according to business needs, and convert the query request filtering policy into query request filtering commands that the access layer can understand at the basic service layer.

For example, the discovery device and the broadcast device can respectively pre-configure the filtering conditions of the query request and the filtering conditions of the query response, so that in the subsequent process, the discovery device and the broadcasting device respectively configure the corresponding filtering conditions according to the filtering conditions of the query request and the query response. letter Information is filtered. The filtering conditions of the query request and the filtering conditions of the query response are respectively used to filter the queryable broadcast and to filter the query request message. Therefore, the two filtering conditions may be different. It should be understood that this application does not limit the execution order of steps S601 and S602.

S603: The broadcast device sends a queryable broadcast, and accordingly, the discovery device receives the queryable broadcast.

Exemplarily, queryable broadcasts include queryable basic broadcasts and queryable extended broadcasts.

Exemplarily, the access layer of the discovery device may initiate scanning, and during the scanning process, may receive queryable broadcasts from the broadcasting device.

S604: The discovery device filters the queryable broadcasts according to the filtering conditions of the query request.

For example, when the discovery device receives a queryable broadcast, the queryable broadcast can be filtered according to the preconfigured filtering conditions of the query request. The queryable broadcast after condition processing can match the corresponding query request frame. The specific process of filtering queryable broadcasts can be found in the description of Figure 8 below.

S605: The discovery device sends a query request frame, and accordingly, the broadcast device receives the query request frame.

Exemplarily, after the discovery device matches the query request frame corresponding to the queryable broadcast, it will send a query request frame to the broadcasting device to request more data content.

For example, after the access layer of the broadcast device receives the query request frame, it can report it to the basic application layer through the basic service layer, and perform analysis and processing on the basic application layer of the broadcast device.

S606: The broadcast device filters the query request frame according to the filtering conditions of the query response.

For example, when the broadcast device receives the query request frame sent by the discovery device, the query request frame can be filtered according to the preconfigured filtering conditions of the query response. The query request frame after filtering can match the corresponding query response frame. The specific process of filtering the query request frame can be found in the description of Figure 9 below.

S607: The broadcast device sends a query response frame, and accordingly, the discovery device receives the query response frame.

For example, the query response frame may include specific data content requested by the discovery device from the broadcast device.

For example, after the access layer of the discovery device receives the query response frame, it can report it to the basic application layer through the basic service layer, and perform analysis and processing on the basic application layer of the discovery device.

For example, the above query request frame and query response frame may be transmitted in message units.

It can be seen that based on the communication device discovery process of method 500, method 600 filters the queryable broadcast and query request frames, and can obtain the query request frame matching the queryable broadcast, and the query request frame matching the query request frame. The query response frame improves the accuracy and efficiency of data transmission between communication devices. However, filtering information requires processing time. To facilitate understanding, Figure 7 shows the discovery process of discovering devices and broadcasting devices on the timeline. The discovery process will be introduced below using the smartphone 360 and the smart car 370 as examples.

As shown in Figure 7, it includes two communication devices, a smart phone 260 and a smart car 270. The smart phone 260 is a broadcasting device or can be considered a power consumption sensitive device; the smart car 270 is a discovery device or can be considered a power consumption sensitive device. consumption of insensitive equipment. 701 and 702 represent two timelines. For example, for the smart phone 260, it starts sending queryable broadcasts at time t2, and can send one or more queryable broadcast frames during the time period t2 to t3; it starts receiving query request frames at time t4, and it can send query request frames during the time period t4~t7. One or more query request frames can be received; query response frames start to be sent at time t8, and one or more query response frames can be sent within the time period from t8 to t9. For the smart car 270, scanning starts at time t1 and a certain query request frame is sent at time t5. It should be understood that the smart car 270 can send one or more query request frames. When time t5 represents the first query request frame sent by the smart car 270 after receiving the queryable broadcast, time t5 coincides with time t4, and time t5 is the smart car 270. The starting time when car 270 sends the query request frame.

The smartphone 260 is a power sensitive device, so the device may send queryable broadcasts periodically. For example, on the timeline 701, during the time period from t0 to t2, the smartphone 260 is in a sleep state to save power consumption, and at time t2, it starts sending queryable broadcasts. The smart car 270 is a power consumption insensitive device and can start scanning at time t1 to ensure that the queryable broadcast sent by the smart phone 260 is received. In addition, the smart car 270 can also receive broadcast messages from other communication devices during the scanning process. .

After sending the queryable broadcast, the smart phone 260 can enter the state of receiving the query request frame. For example, at time t4, the smartphone 260 enters a state of receiving a query request frame, and this state requires a certain dwell time. For example, during the time period from t4 to t7, the smartphone 260 is in a state of receiving a query request frame. The smart phone 260 needs to receive the query request frame sent by the smart car 270 within the residence time. The smart car 270 also needs to stay in the scanning state long enough, for example, the time period t1 to t10, in order to receive the query response frame sent by the smart phone 260.

According to the above description of method 600, it can be seen that the discovery process includes a stage of filtering based on two filtering conditions, respectively. The smart car 270 performs filtering processing on queryable broadcasts, and the smart phone 260 performs filtering processing on query request frames. Depending on the hardware capabilities and performance of the communication equipment, different filtering processing times are required. The filtering processing time can be the system default processing time, or the processing time configured through queryable broadcast. As shown in FIG. 7 , the smart phone 260 and the smart car 270 can agree on time offset #1 and time offset #2. For example, time offset #1 is the time period t3 ~ t4, used to represent the processing time of the smart car 270 to filter the queryable broadcast; time offset #2 is the time period t7 ~ t8, used to represent the smart phone 270 260 processing time for filtering query request frames. The two time offsets can be standard fixed values, such as an intra-frame space (IFS) length. Different wireless communication media can have different IFS lengths. If the IFS length is not long enough, you can define a new offset length. For example, in the time offset, not only the above-mentioned filtering processing can be performed, but other wireless tasks can also be processed, such as data transmission and reception, broadcast transmission and reception, scanning, etc. For example, the smart car 270 may continue to scan and receive broadcast messages from multiple communication devices within time offset #1.

For ease of understanding, Figure 8 shows a filtering process flow for queryable broadcasts. This filtering process can be applied to discover devices.

After the discovery device receives the queryable broadcast, it can match the queryable broadcast with the filtering conditions of the query request. The filter conditions of each query request can have corresponding query request frames. For example, as shown in Figure 8, the filtering condition 1 of the query request corresponds to the query request frame 1, the filtering condition 2 of the query request corresponds to the query request frame 2, the filtering condition 3 of the query request corresponds to the query request frame 3, and the filtering of the query request Condition N corresponds to query request frame N.

When the queryable broadcast content satisfies the filtering condition of a certain query request, the discovery device can send a query request frame corresponding to the filtering condition. For example, when the content of the queryable broadcast satisfies the filtering condition 1 of the query request, the discovery device sends the query request frame 1; when the content of the queryable broadcast satisfies the filtering conditions 2 and 3 of the query request, the discovery device sends the query request frame. 2 and 3. For example, the query request message sent by the discovery device may include one or more query request frames.

For example, the filtering conditions of the query request may be carried in the query request filtering command sent by the basic service layer of the discovery device to the access layer of the discovery device.

For example, the filter condition 1 of the query request, the filter condition 2 of the query request, the filter condition 3 of the query request, and the filter condition N of the query request in Figure 8 belong to the query request filter set elements, and the query request filter set elements can It is understood as a collection of filter conditions for query requests, which can include one or more filter conditions for query requests.

For example, options that can be used as filter conditions for the query request may include media access control (MAC) identification, device name, and other public information of the communication device. Each item in the device public information can be used as a filtering condition. All filtering conditions can be configured to the Starflash access layer as required. The Starflash access layer completes the discovery result filtering, or the device discovery functional unit completes the device discovery result filtering. . For multiple filter conditions, logical AND, logical OR, and logical negation configurations are provided. Logical AND means that all filtering conditions must be met at the same time to complete the match; logical OR means that matching one of the filtering conditions will result in a successful match; logical negation means that matching one of the filtering conditions will fail. For example, the filter conditions of the query request can be configured as: user A and application B. Then it is found that the query request frame sent by the device is used to request the relevant data content of user A of application B.

For example, the filtering conditions of the query request can be composed of the AND/OR/NOT combination of single or multiple conditions in the device address, device name, service UUID, service data, manufacturer data and other information. It is found that the device supports queryable The broadcast is filtered according to the filtering conditions, and a query request frame corresponding to the filtering conditions of the query request is sent. Furthermore, the efficiency of data content transmission between the discovery device and the broadcast device can be improved.

For ease of understanding, Figure 9 shows a filtering process flow for query request messages. This filtering process can be applied to broadcast equipment.

After the broadcast device receives the query request message, it can match the query request message with the filtering conditions of the query response. Each query response filter condition can have a corresponding query response frame. The query request message may include one or more query request frames. For example, as shown in Figure 9, the filter condition 1 of the query response corresponds to the query response frame 1, the filter condition 2 of the query response corresponds to the query response frame 2, the filter condition 3 of the query response corresponds to the query response frame 3, and the filtering of the query response Condition N corresponds to query response frame N.

When the content of the query request message meets the filtering condition of a certain query response, the broadcast device can send a query response frame corresponding to the filtering condition. For example, when the content of the query request message meets the filtering condition 1 of the query response, the broadcasting device sends query response frame 1; when the content of the query request message meets the filtering conditions 2 and 3 of the query response, the broadcasting device sends the query Response frames 2 and 3. For example, the query response message sent by the broadcast device may include one or more query response frames.

For example, the query response filtering conditions may be carried in the query response filtering command sent by the basic service layer of the broadcasting device to the access layer of the broadcasting device.

For example, query response filter condition 1, query response filter condition 2, query response filter condition 3 and query response filter condition N in Figure 9 belong to query response filter set elements, and the query response filter set element can It is understood as a collection of filtering conditions for query responses, which may include one or more filtering conditions for query responses.

For example, the filtering conditions of the query response can be composed of the AND/OR/NOT combination of single or multiple conditions in the device address, device name, service UUID, service data, manufacturer data and other information. The broadcast device supports query requests. The frame is filtered according to the filtering conditions, and a query response frame corresponding to the filtering conditions of the query response is sent. Furthermore, the efficiency of data content transmission between the discovery device and the broadcast device can be improved. Among them, the process of the broadcast device filtering the query request frame according to the AND/OR/NOT combination of single or multiple conditions can be found in the above-mentioned related expressions of the discovery device filtering the queryable broadcast, and this application will not go into details here. .

It should be understood that Figures 8 and 9 respectively illustrate the process in which the discovery device filters the queryable broadcast information according to the filtering conditions of the query request, and the broadcasting device filters the query request message according to the filtering conditions of the query response. The following takes the filtering processing of queryable broadcasts by the discovery device as an example to introduce the filtering processing mechanism. The filtering process may also be called a filtering matching process, and this application does not limit the specific name of this process.

As shown in Figure 10, a schematic diagram of the filtering process of the discovery device is shown.

Step 1: Discover the device and receive the message.

For example, the discovery device may receive a broadcast message from the broadcast device, and the broadcast message may include a binary data packet (1).

Step 2: Discover the device matching the mask.

For example, mask (2) is composed of binary 0s and 1s. "1" indicates that the binary data at the location needs to match, "0" indicates that the binary data at the location does not need to match. Obtain binary data (3) based on the match between the data message (1) and the binary mask (2). It can be seen that the first position data "0", the third position data "1", the sixth position data "1", the seventh position data "0" and the eighth position in (3) need to be specifically matched from left to right. Data "1".

Step 3: Discover devices and match them based on specific filtering conditions.

For example, the filtering conditions of the query request may be formed by AND/OR/NOT logical combination of one or more of the information such as device address, device name, service UUID, requested service UUID, service data, and manufacturer data. Discovery devices can match query request frames based on the combined filter criteria.

Accordingly, the filtering conditions of the query response may be formed by AND/OR/NOT logical combinations of one or more of the information such as device address, device name, service UUID, requested service UUID, service data, and manufacturer data. The broadcast device can match query response frames based on the combined filter conditions.

For example, the discovery device may match the binary data (3) according to filter condition 1 and/or filter condition 2. If the match is successful, the discovery device determines the corresponding query request frame and sends the query request message.

As can be seen from the above, the discovery device can send a query request message to the broadcast device. Exemplarily, the query request message can be sent in the form of a query request frame. Among them, the query request frame belongs to a broadcast frame. In the embodiment of the present application, a broadcast frame common to the Star Flash protocol can be used. The structure of the query request frame is specifically introduced below.

As shown in Table 1, the corresponding structure of the starlight universal broadcast frame is shown.

Table 1 The structure corresponding to the star flash general broadcast frame

As shown in Table 2, the information content represented by each field in the starlight universal broadcast frame is shown.

Table 2 Information content in star flash general broadcast frame

The following describes each field in Table 2:

1. Broadcast frame structure indication: Whether fields used to identify subsequent local media access layer identification, peer media access layer identification, and extended broadcast frame resource configuration information exist. The local end can be understood as a discovery device, and the opposite end can be understood as a broadcast device. Among them, the meanings of the 5 bits indicated by the broadcast frame structure are as follows:

(1) Bit 0: 0 indicates that the local address does not exist, 1 indicates that the local address exists;

(2) Bits 1:0 indicate that the peer address does not exist, 1 indicates that the peer address exists;

(3) Bit 2: 0 indicates that the extended broadcast frame resource configuration information does not exist, and 1 indicates that the extended broadcast frame resource configuration information exists;

(4) Bit 3: 0 indicates that the data part information does not exist, 1 indicates that the data part information exists;

(5) Bit 4:0 indicates that there is no resolution key identifier, and 1 indicates that the local address is a resolvable private address and there is a resolution key identifier.

2. Local media access layer identification type: 0 indicates the identification assigned by the Star Flash Alliance, 1 indicates the private identification.

3. Peer media access layer identification type: 0 indicates the identification assigned by the Star Flash Alliance, 1 indicates the private identification.

4. Local media access layer identifier: Local media access layer identifier (Media Access Control, MAC).

5. Peer media access layer identifier: Peer MAC.

6. Identity resolving key (IRK ID): used for privacy management of the Star Flash wireless low-power system.

For example, the privacy management of the StarLight wireless low-power system provides the ability to hide the true identity of the StarLan wireless low-power system, which can avoid malicious monitoring by the server or prevent the monitoring party from collecting private data of the StarLan wireless low-power system. , to prevent being tracked.

StarLight wireless low-power device addresses include resolvable random addresses. The format of the resolvable random addresses is shown in Table 3.

Table 3 The format of parsable random addresses

Among them, the generation algorithm of the address hash part is: address hash part = HMAC-SM3/AES-CMAC (IRK, rand, len) mod2^16.

Among them, rand represents the random part of the address.

When a communication device (for example, a node) receives a message containing a resolvable random address and an IRK ID, it first finds the corresponding IRK ID in the peer IRK ID list in the parsing list based on the IRK ID, and then uses the IRK Calculate the peer IRK corresponding to the ID: localHash=HMAC-SM3/AES-CMAC(IRK, rand, len) mod 2^16 (where rand is extracted from the resolvable random address), and then compare the result localHash with the resolvable random address Hash comparison contained in the address. If both are the same, the address resolution is successful. Then find the peer device address corresponding to the peer IRK and initiate the connection.

If there are multiple corresponding IRKs in the peer IRK ID in the resolution list, the above process is repeated for each IRK ID corresponding to determine whether the received resolvable private address is associated with the stored IRK until one of the IRKs is Identity resolution was successful or all corresponding IRKs were tried. Among them, Table 4 shows the main contents of the parsing list.

Table 4 Main contents of parsing list

7. Extend broadcast frame resource configuration information

The corresponding structure of the extended broadcast frame resource configuration information is shown in Table 5.

Table 5 Structure corresponding to extended broadcast frame resource configuration information

Furthermore, Table 6 shows the field description of the extended broadcast frame resource configuration information.

Table 6 Field description of extended broadcast frame resource configuration information

The following describes each field in Table 5:

(1) Frequency index: used to identify the frequency index number used by the extended broadcast frame pointed to.

(2) Offset unit: The unit used to identify the offset. 0 indicates that the unit is 1 system basic time slot, and 1 indicates that the unit is 10 system basic time slots.

(3) Offset: used to indicate the time slot interval from the starting point of the current basic broadcast frame to the starting point of the pointed extended broadcast frame.

(4) Wireless frame type indication: used to indicate the wireless frame type used by the system management frame.

(5) Bandwidth indication: used to indicate the bandwidth used by the system management frame. 0 means 1M; 1 means 2M; 2 means 4M; 3 means reserved.

The bit width corresponding to the bandwidth indication is 2 bits, and the 2-bit binary number can correspond to the above-mentioned decimal numbers 0 to 3.

(6) Pilot density indication: used to indicate the pilot density used in the data part of the system management frame. 0 indicates 4:1 pilot, 1 indicates 8:1 pilot, 2 indicates 16:1 pilot, and 3 indicates reserved.

The bit width corresponding to the pilot density indication is 2 bits, and the 2-bit binary number can correspond to the above-mentioned decimal number 0 to 3.

(7) Clock accuracy: Used to indicate the clock accuracy used by the pointed extended broadcast frame.

8. Data type: used to indicate the type of broadcast data carried by the extended broadcast frame. 0 means discovery of access resource configuration information; 1 means not to start the transmission instruction information of the system management frame; 2 means to start the basic access information of the system management frame; 3 means access request information; 4 means access response information; 5 means start System management frame information; 6 represents non-linked broadcast link information; 7 represents query request information; 8 represents query response information; 9 to 254 are reserved; the data format of 255 is configured by the basic service layer device discovery and service management.

Among them, the corresponding bit width of the data type is 1 byte, which is 8 bits. The 8-bit binary number can correspond to the above-mentioned decimal number 0~255. 0~255 can be understood as the index of the data type, which is used to indicate what the data type represents. specific information.

9. Data length: used to indicate the length of the broadcast data carried by the extended broadcast frame.

10. Data content: used to indicate the content of the broadcast data carried in the extended broadcast frame.

To facilitate understanding, Table 7 shows the corresponding meanings of the indexes of the data types in the general broadcast frame.

Table 7 Indexes of data types

Specifically, the data type may include query request information and query response information. The length of bytes occupied by the query request information and query response information can be adjusted to a variable length. The index of query request information is 0x07; the index of query response information is 0x08.

The discovery access resource configuration information in the data type can be used to indicate the resource information used for discovery or access in the extended broadcast configuration, including information such as request offset, request maximum length, request response offset, and request window number. . Resource configuration can support one request information or multiple different request information, where the request can be a query request or an access request. As shown in Table 8, the corresponding structure of the discovery access resource configuration information is shown.

Table 8 Discovery access resource configuration information corresponding structure

As shown in Table 9, the information content represented by each field in the discovery access resource configuration information is shown.

Table 9 Discovery access resource configuration information content

The main fields in Table 9 are explained below:

1. Requested offset: used to indicate the time slot offset of the discovery device or the connection initiating device from receiving the extended broadcast frame to sending the request frame. It is also the time from the broadcast device sending the extended broadcast frame to starting to receive the request frame. .

2. Maximum length of request: used to indicate the maximum data length of a single request frame, in bytes.

3. Offset of request response: used to indicate the time slot offset of the broadcast device from sending the extended broadcast frame to sending the request response frame. It is also the time slot offset of the discovery device or the device initiating the connection from receiving the extended broadcast frame to receiving the request. Response frame time.

4. GT negotiation indication: used to indicate whether it can negotiate to become a resource scheduling (grant, G) role or a terminal (terminal, T) role. Accessible extended broadcast frames carrying this field are valid, and queryable extended broadcast frames carrying this field are invalid. Bit 0=0 indicates negotiation as a T node, bit 0=1 indicates negotiation as a G node. Bit 1 = 0 indicates that the node can negotiate, and bit 1 = 1 indicates that the node cannot negotiate.

5. Number of requested windows: used to indicate the number of windows for request frames, that is, one or more requests can be supported at the same time.

6. Request type flag: Also called request type indication, it is used to indicate whether the resource corresponds to a query request or an access request. 0 indicates query request; 1 indicates access request; 2 indicates no restriction; 3 indicates reservation.

Among them, the bit width corresponding to the request type flag is 2 bits, and the 2-bit binary number can correspond to the above-mentioned decimal numbers 0 to 3.

7. Request carrying information indication: used to indicate the information content that can be carried in the request frame. 0 means no data information is carried, 1 means the service UUID and manufacturer data are carried, 2 means the device name, service UUID, service data and manufacturer data are carried, and 3 means the data information content is not limited.

The bit width corresponding to the request carrying information indication is 2 bits, and the 2-bit binary number can correspond to the above-mentioned decimal numbers 0 to 3.

8. Identity type: 0 indicates the identification assigned by the Star Flash Alliance, 1 indicates the private identification.

9. Directional indication: used to indicate whether there is a peer address behind.

10. Peer media access layer identifier: used to indicate the media access layer identifier of the peer device.

Exemplarily, the Starflash query request frame sets the request type flag to 0 in the discovery access resource configuration information indication, and adds the query request information with the data type index of 7. The discovery device supports query request information according to the request service UUID indication, and the broadcast device supports filtering the feedback query response frame according to the request service UUID information carried by the query request information. Table 10 shows the structure of the query request information.

Table 10 Query request information

As shown in Table 11, the information content represented by each field of the query request information is shown.

Table 11 Field description of query request information

The fields in Table 11 are described below.

1. Number of 16-bit UUIDs: Indicates the number of 16-bit UUIDs contained in the query request information.

2. Number of 128-bit UUIDs: The identification query request information contains the number of 128-bit UUIDs.

3. 16-bit UUID: Indicates the 16-bit UUID defined by the Star Flash Alliance.

4. 128-bit UUID: Indicates a device-customized 128-bit UUID.

It can be seen that the discovery device sends the query request information carrying the service UUID related information to the broadcast device, so that the broadcast device can filter the query request information to obtain the corresponding query response frame.

The above data content of data type 255 includes device public information data. The structure of the device public information data is shown in Figure 11. The device public information data includes one or more data substructures. Each data substructure includes data type indication information, data length indication information L and data content part. For example, the bit width of the data type indication information is 1 byte, the bit width of the data length indication information L is 1 byte, and the bit width of the data content part is L bytes.

Specifically, the device information disclosure data may include specific content as described in Table 11.

Table 12 Specific contents of equipment public information data

For example, the device public information data includes the requested service UUID. Requesting service UUID includes requesting standard service identification list and requesting customized service data information. It can be understood that the relevant information about the requested service UUID can be carried in the query request information as shown in Table 11 above, or can also be carried in the above data type 255.

Figure 12 shows a communication method 1200 provided by this application, which can be applied to discovery devices and broadcast devices. The detailed steps of method 1200 are introduced below.

S1210: The discovery device receives the broadcast information, and accordingly, the broadcast device sends the broadcast information.

For example, the broadcast information includes queryable broadcast information and non-queryable broadcast information, and the queryable broadcast information includes queryable basic broadcast information or queryable extended broadcast information. For example, the broadcast information in method 1200 of this application may be queryable broadcast information.

S1220: The discovery device sends at least one query request frame according to the broadcast information and the filtering indication information of the at least one query request. Correspondingly, the broadcast device receives at least one query request frame.

For example, when the discovery device receives the queryable extended broadcast information, the discovery device may send at least one query request frame according to the queryable extended broadcast information and the filtering indication information of at least one query request; when the discovery device receives the queryable basic broadcast, The discovery device may send at least one query request frame according to the queryable basic broadcast information and the filtering indication information of the at least one query request.

Among them, the discovery device may first receive the queryable basic broadcast frame, and then receive the queryable extended broadcast frame. The discovery device can send a query request frame to the broadcast device after receiving the queryable basic broadcast frame. There is no need for the discovery device to send the query request frame to the broadcast device after receiving the queryable extended broadcast information as shown in Figure 5 above. Query request frame to request more data content. It can be seen that after the discovery device receives the queryable basic broadcast, it sends a query request frame to the broadcast device, which can further save the interactive signaling between the discovery device and the broadcast device, save transmission resources, and improve the communication between the discovery device and the broadcast device. Communication efficiency.

For example, the query request frame has a one-to-one correspondence with the filtering instruction information of the query request. For the specific one-to-one correspondence, please refer to the above description of Figure 8 and will not be described again here.

In some embodiments, the discovery device is within the first offset based on the queryable broadcast information and the filtering indication of the at least one query request. The information sends at least one query request frame to the broadcast device, and the offset of the query request includes a first offset, wherein the offset of the query request is used to indicate a starting time for the discovery device to send the query request frame.

For example, the first offset may be the time when the discovery device filters the queryable broadcast. Within the first offset, the discovery device determines the query request frame corresponding to the filtering indication information of the query request. The queryable broadcast may include a first offset, and the discovery device may obtain the first offset according to the received queryable broadcast; or the first offset may also be the system default processing time, for example, an IFS. For example, according to the above description of Figure 7, the offset of the query request is the time period t2~t7, and the first offset is the time period t3~t4.

It can be understood that the filtering indication information of the query request is used to filter the data content that the discovery device is "interested in", so that the discovery device sends a query request frame corresponding to the filtering indication information of the query request to request the "interesting" data. content.

In some embodiments, the filtering indication information of the query request includes at least one of the following: device address, device name, service UUID, requested service UUID, service data, and manufacturer data.

For example, the requested service UUID is used to request corresponding service data or information on the peer device. When the discovery device sends a query request frame filtered according to the requested service UUID to the broadcast device, the discovery device can request the broadcast device for corresponding service data or information on the broadcast device (peer device).

For example, one or more pieces of information contained in the filtering indication information of the query request can be logically combined with AND/OR/NOT, and the discovery device can match the query request frame according to the combined filtering indication information.

S1230: The broadcast device sends at least one query response frame according to at least one query request frame and the filtering indication information of at least one query response. Correspondingly, the discovery device receives at least one query response frame.

For example, the query response frame has a one-to-one correspondence with the filtering instruction information of the query response. For the specific one-to-one correspondence, please refer to the above description of Figure 9 and will not be described again here.

In some embodiments, the broadcast device sends at least one query response frame to the discovery device within the second offset based on at least one query request frame and at least one query response filtering indication information, and the offset of the query response includes the second offset. Offset, where the offset of the query response is used to indicate the starting moment of sending the query response frame.

For example, the second offset may be the time when the broadcast device filters the query request message. Within the second offset, the broadcast device determines the query response frame corresponding to the filtering indication information of the query response. The second offset may be the system default processing time, for example, an IFS. For example, according to the above description of Figure 7, the offset of the query response is the time period t2~t8, and the second offset is the time period t7~t8.

It can be understood that the broadcast device sends a query response frame corresponding to the filtering indication information of the query response to ensure that the discovery device receives "interesting" data content.

In some embodiments, the filtering indication information of the query response includes at least one of the following: device address, device name, service universal unique identifier UUID, requested service UUID, service data, and manufacturer data.

For example, one or more pieces of information contained in the filtering indication information of the query response can be logically combined with AND/OR/NOT, and the broadcasting device can match the query response frame according to the combined filtering indication information.

In some embodiments, the query request frame includes a data type field, and the data type field includes one of query request information and query response information. The information contained in the data type field can be as described in Table 7 above, and will not be described again here.

In some embodiments, when the data type field includes query request information, the query request information includes the request service UUID.

Specifically, the requested service UUID of the query request information includes the number of 16-bit UUIDs, the number of 128-bit UUIDs, the 16-bit UUID and the 128-bit UUID as described in Table 11 above. Details can be found above and will not be repeated here.

In some embodiments, the query request frame includes a data type field including the requesting service UUID.

Specifically, the requested service UUID is carried in the data type 255. The requested service UUID may be the requested standard service identification list and the requested customized service data information as described in Table 12. Details can be found above and will not be repeated here.

For example, the requested service UUID can be carried in the query request information or in the data type.

In some embodiments, the offset of the query request, the offset of the query response, the first offset, and the second offset may be sent to the discovery device through a queryable extension broadcast.

Specifically, the queryable extended broadcast information includes at least one of the following: offset of query request, offset of query response, maximum length of request, number of requested windows, first offset, second offset ;The offset of the query request is used to indicate the starting time when the discovery device sends the query request frame, or the starting time when the broadcast device receives the query request frame; the offset of the query response is used Indicates the starting time when the discovery device receives the query response frame, or is used to instruct the broadcasting device to send the starting time of the query response frame; the maximum length of the request is used to indicate the maximum data length of a request frame, and the request frame includes the query request frame; request The number of windows is used to indicate the number of windows for the request frame.

A communication method provided by an embodiment of the present application filters broadcast frames (for example, query broadcast and query request frames) interacted between communication devices so that the communication devices can request more detailed or accurate information, such as: media Distribution scenarios such as playback content and status control, distributed database water level detection, device power, computing power and storage load status, authentication and key update. This method allows the communication device to avoid the waste of resources caused by the communication device frequently establishing connections before transmitting data when the peripheral device has a lot of data, or the communication device is constantly moving and the peripheral device is constantly changing, and at the same time improves the efficiency of applications on the communication device. communication efficiency between them in order to give full play to the discovery performance of the communication device.

Figure 13 is a schematic block diagram of a communication device provided by an embodiment of the present application. The device 1300 includes a transceiver unit 1310, which may be used to implement corresponding communication functions. The transceiver unit 1310 may also be called a communication interface or a communication unit.

In a possible design, the device 1300 may also include a processing unit 1320, which may be used for data processing.

In a possible design, the device 1300 also includes a storage unit, which can be used to store instructions and/or data, and the processing unit 1320 can read the instructions and/or data in the storage unit, so that the device implements the foregoing. Actions of different communication devices in various method embodiments, for example, actions of a discovery device or a broadcast device.

The device 1300 can be used to perform the actions performed by the discovery device or broadcast device in each of the above method embodiments. In this case, the device 1300 can be a discovery device or broadcast device, or a component of the discovery device or broadcast device, a transceiver unit 1310 is used to perform operations related to the transmission and reception of the discovery device or broadcast device in the above method embodiment, and the processing unit 1320 is used to perform operations related to the processing of the discovery device or broadcast device in the above method embodiment.

It should also be understood that the device 1300 here is embodied in the form of a functional unit. The term "unit" as used herein may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (such as a shared processor, a proprietary processor, or a group of processors) used to execute one or more software or firmware programs. processor, etc.) and memory, merged logic circuitry, and/or other suitable components to support the described functionality. In an optional example, those skilled in the art can understand that the device 1300 can be specifically the discovery device or broadcast device in the above embodiments, and can be used to execute various processes corresponding to the discovery device or broadcast device in the above method embodiments. and/or steps.

The above functions can be implemented by hardware, or can be implemented by hardware executing corresponding software. The hardware or software includes one or more modules or units corresponding to the above functions; for example, the transceiver unit can be replaced by a transceiver (for example, the sending unit in the transceiver unit can be replaced by a transmitter, and the receiving unit in the transceiver unit can (replaced by a receiver), and other units, such as a processing unit, can be replaced by a processor to respectively perform the transceiver operations and related processing operations in each method embodiment.

In addition, the above-mentioned transceiver unit 1310 may also be a transceiver circuit (for example, it may include a receiving circuit and a transmitting circuit), and the processing unit may be a processing circuit.

It should be pointed out that the device in Figure 13 may be the device in the aforementioned embodiment, or it may be a chip or a chip system, such as a system on chip (SoC). The transceiver unit may be an input-output circuit or a communication interface; the processing unit may be a processor, microprocessor, or integrated circuit integrated on the chip. No limitation is made here.

As shown in FIG. 14 , a chip system 1400 is provided according to an embodiment of the present application. The chip system 1400 (or can also be called a processing system) includes a logic circuit 1410 and an input/output interface 1420.

The logic circuit 1410 may be a processing circuit in the chip system 1400 . The logic circuit 1410 can be coupled to the memory unit and call instructions in the memory unit, so that the chip system 1400 can implement the methods and functions of various embodiments of the present application. The input/output interface 1420 can be an input/output circuit in the chip system 1400, which outputs information processed by the chip system 1400, or inputs data or signaling information to be processed into the chip system 1400 for processing.

As a solution, the chip system 1400 is used to implement the operations performed by the discovery device or the broadcast device in each of the above method embodiments.

For example, the logic circuit 1410 is used to implement related operations processed by the discovery device or broadcast device in the above method embodiment; the input/output interface 1420 is used to implement the sending and/or reception by the discovery device or broadcast device in the above method embodiment. related operations.

Embodiments of the present application also provide a computer-readable storage medium on which are stored computer instructions for implementing the methods executed by the discovery device or the broadcast device in each of the above method embodiments.

For example, when the computer program is executed by a computer, the computer can implement the method executed by the discovery device or the broadcast device in each embodiment of the above method.

An embodiment of the present application also provides a computer program product, comprising instructions, which, when executed by a computer, implement the methods performed by the discovery device or the broadcasting device in the above-mentioned method embodiments.

For explanations of relevant content and beneficial effects of any of the devices provided above, please refer to the corresponding method embodiments provided above, and will not be described again here.

In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. For example, the computer may be a personal computer, a server, or a network device. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another, e.g., the computer instructions may be transferred from a website, computer, server, or data center Transmission to another website, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) means. 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, data center, etc. that contains one or more available media integrated. The available media may be magnetic media (such as floppy disks, hard disks, magnetic tapes), optical media (such as DVDs), or semiconductor media (such as solid state disks (SSD)), etc. For example, the aforementioned available media include but Not limited to: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program code.

The terms "component", "module", "system", etc. used in this specification are used to refer to computer-related entities, hardware, firmware, a combination of hardware and software, software, or software in execution. For example, a component may be, but is not limited to, a process, a processor, an object, an executable file, a thread of execution, a program and/or a computer running on a processor. These components can execute from various computer-readable media having various data structures stored thereon. A component may, for example, be based on a signal having one or more data packets (eg, data from two components interacting with another component, a local system, a distributed system, and/or a network, such as the Internet, which interacts with other systems via signals) Communicate through local and/or remote processes.

In this application, "at least one" means one or more, and "plurality" means two or more. "And/or" describes the relationship between associated objects, indicating that there can be three relationships. For example, A and/or B can mean: A exists alone, A and B exist simultaneously, and B exists alone, where A, B can be singular or plural. The character "/" generally indicates that the related objects are in an "or" relationship. "At least one of the following" or similar expressions thereof refers to any combination of these items, including any combination of a single item (items) or a plurality of items (items). For example, at least one item (item) of a, b or c can represent: a, b, c, a-b, a-c, b-c or a-b-c, where a, b, c can be single or multiple.

Those of ordinary skill in the art will appreciate that the various illustrative logical blocks and steps described in connection with the embodiments disclosed herein can be implemented as electronic hardware, or a combination of computer software and electronic hardware. accomplish. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each specific application, but such implementations should not be considered beyond the scope of this application.

The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. A person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application, which should be included in the protection scope of this application. Therefore, the protection scope of this application should be based on the protection scope of the claims.

Claims

A communication method, characterized by including:

The discovery device receives broadcast information from the broadcast device;

The discovery device sends at least one query request frame to the broadcast device according to the broadcast information and the filtering indication information of at least one query request, and the query request frame corresponds one-to-one with the filtering indication information of the query request;

The discovery device receives at least one query response frame from the broadcast device, and the query response frame corresponds one-to-one to the filtering indication information of the query response.
The method according to claim 1, characterized in that the discovery device sends at least one query request frame to the broadcast device according to the broadcast information and the filtering indication information of at least one query request, including:

The discovery device sends at least one query request frame within a first offset according to the broadcast information and at least one filtering indication information of the query request, and the offset of the query request includes the first offset. , the offset of the query request is used to indicate the starting time of sending the query request frame.
The method according to claim 1 or 2, characterized in that the filtering indication information of the query request includes at least one of the following:

Device address, device name, service universal unique identifier UUID, requested service UUID, service data, and manufacturer data.
The method according to any one of claims 1 to 3, characterized in that,

The query request frame includes a data type field, and the data type field includes one of query request information and query response information.
The method according to claim 4, characterized in that the query request information includes the requested service UUID.
The method according to any one of claims 1 to 3, characterized in that

The query request frame includes a data type field, and the data type field includes the request service UUID.
The method according to any one of claims 1 to 6, characterized in that the broadcast information includes extended broadcast information, and the extended broadcast information includes at least one of the following:

The offset of the query request, the offset of the query response, and the first offset,

The offset of the query response is used to indicate the starting time of receiving the query response frame.
A communication method, characterized by including:

The broadcast device sends broadcast information to the discovery device;

The broadcast device receives at least one query request frame from the discovery device, and the query request frame corresponds one-to-one with the filtering indication information of the query request;

The broadcast device sends at least one query response frame to the discovery device according to at least one of the query request frame and at least one filtering indication information of the query response, and the query response frame corresponds one-to-one to the filtering indication information of the query response. .
The method according to claim 8, characterized in that the broadcast device sends at least one query response frame to the discovery device according to at least one query request frame and at least one query response filtering indication information, including:

The broadcasting device sends at least one query response frame to the discovery device within a second offset according to the filtering indication information of the at least one query request frame and the at least one query response, the offset of the query response includes the second offset, and the offset of the query response is used to indicate the starting time of sending the query response frame.
The method according to claim 8 or 9, characterized in that the filtering indication information of the query response includes at least one of the following:

Device address, device name, service universal unique identifier UUID, requested service UUID, service data, and manufacturer data.
The method according to any one of claims 8 to 10, characterized in that,

The query request frame includes a data type field, and the data type field includes one of query request information and query response information.
The method according to claim 11, characterized in that the query request information includes the requested service UUID.
The method according to any one of claims 8 to 10, characterized in that,

The query request frame includes a data type field, and the data type field includes the request service UUID.
The method according to any one of claims 8 to 13, characterized in that the broadcast information includes extended broadcast information, and the extended broadcast information includes at least one of the following:

The offset of the query request, the offset of the query response, and the second offset,

The offset of the query request is used to indicate the starting time of receiving the query request frame.
A communication system, characterized by including: a discovery device and a broadcast device,

The discovery device receives broadcast information from the broadcast device;

The discovery device sends at least one query request frame to the broadcast device according to the broadcast information and the filtering indication information of at least one query request, and the query request frame corresponds one-to-one with the filtering indication information of the query request;

The broadcasting device sends at least one query response frame to the discovery device according to the at least one query request frame and the filtering indication information of the at least one query response, and the query response frame corresponds to the filtering indication information of the query response in a one-to-one manner.
The system according to claim 15, characterized in that the discovery device sends at least one query request frame to the broadcast device according to the broadcast information and the filtering indication information of at least one query request, including:

The discovery device sends at least one query request frame within a first offset according to the broadcast information and at least one filtering indication information of the query request, and the offset of the query request includes the first offset. , the offset of the query request is used to indicate the starting time when the discovery device sends the query request frame.
The system according to claim 15 or 16, characterized in that the broadcast device sends at least one query response frame to the discovery device according to the at least one query request frame and the filtering indication information of at least one query response, including:

The broadcast device sends at least one query response frame to the discovery device within a second offset according to the at least one query request frame and the filtering indication information of at least one query response, and the offset of the query response includes the The second offset, the offset of the query response is used to indicate the starting time when the broadcast device sends the query response frame.
The system according to any one of claims 15 to 17, characterized in that the filtering indication information of the query request includes at least one of the following:

Device address, device name, service universal unique identifier UUID, requested service UUID, service data, manufacturer data;

The filtering instruction information of the query response includes at least one of the following:

The device address, the device name, the service UUID, the requested service UUID, the service data, and the manufacturer data.
The system according to any one of claims 15 to 18, characterized in that,

The query request frame includes a data type field, and the data type field includes one of query request information and query response information.
The system according to claim 19, wherein the query request information includes the requested service UUID.
The system according to any one of claims 15 to 18, characterized in that

The query request frame includes a data type field, and the data type field includes the request service UUID.
The system according to any one of claims 15 to 21, wherein the broadcast information includes extended broadcast information, and the extended broadcast information includes at least one of the following:

The offset of the query request, the offset of the query response, the first offset, and the second offset.
A communication device, characterized by comprising: a module for performing the method as described in any one of claims 1 to 7, or a module for performing the method as described in any one of claims 8 to 14 .
A communication device, characterized in that it includes: a processor coupled to a memory, the memory is used to store a computer program, and the processor is used to run the computer program, so that the communication device executes claims 1 to 7 The method according to any one of claims 8 to 14, or causing the communication device to perform the method according to any one of claims 8 to 14.
The communication device according to claim 24, characterized in that the device further includes one or more of the memory and a transceiver, the transceiver is used for receiving signals and/or transmitting signals.
A computer-readable storage medium, characterized in that the computer-readable storage medium includes a computer program or instructions, and when the computer program or instructions are run on a computer, the computer-readable storage medium causes the computer-readable storage medium to perform as claimed in any one of claims 1 to 7. The method described in any one of claims 8 to 14 is performed.
A computer program product, characterized in that the computer program product includes a computer program or instructions, and when the computer program or instructions are run on a computer, the method according to any one of claims 1 to 7 is performed. execute, or cause to be enforced The method of any one of claims 8 to 14 is performed.