RU2782181C1 - Method and apparatus for connecting bluetooth devices - Google Patents

Abstract

FIELD: wireless communication.

SUBSTANCE: invention relates to methods and apparatuses for Bluetooth communication. The technical result is achieved by executing the following stages of the method: searching for an available Bluetooth device; receiving the announced information sent via the available Bluetooth device, containing UUID information of a service supported by the first Bluetooth device; receiving the UUID information indicating the service supported by the first Bluetooth device and contained in the announced information of the first Bluetooth device; pairing with the first Bluetooth device; establishing a connection to provide services with the first Bluetooth device based on the UUID information of the service supported by the first Bluetooth device and received in the announced information; and skipping the service detection process, wherein said process consists in a Bluetooth device detecting the service supported by the first Bluetooth device.

EFFECT: reduced time for establishing Bluetooth connection.

16 cl, 10 dwg

Description

The technical field to which the invention belongs

[0001] The present invention relates to the field of mobile communication technology and, in particular, to a method and equipment for connecting Bluetooth devices.

State of the art

[0002] Bluetooth is a wireless technology-based standard that enables mobile devices to communicate over short distances. The Bluetooth communication method includes classic Bluetooth technology (Basic Rate/Enhanced Data Rate, BR/EDR) and Bluetooth Low Energy Technology (Bluetooth Low Energy Technology, BLE). Compared with classic Bluetooth technology, Bluetooth low energy technology can transmit more data by using less power.

[0003] In the conventional technology, a Bluetooth device, after pairing, should obtain a service that can be provided by another Bluetooth device paired with the previous Bluetooth device through a service discovery process, and based on the service information carried in the information on communication regarding the service discovery process, to determine whether or not to start the corresponding connection to provide services. However, the service discovery process needs to spend a relatively long period of time. Therefore, the likelihood of a problem increases.

The essence of the invention

[0004] In order to solve the above technical problem, this application provides a method and apparatus for connecting Bluetooth devices. Technical solutions are as follows.

[0005] According to a first aspect, an embodiment of this application provides a Bluetooth device, including: a Bluetooth module configured to communicate with another Bluetooth device, the Bluetooth module including a Bluetooth host and a Bluetooth application, and the Bluetooth module further includes one or more processors; and a storage device, the storage device including instructions. When instructions are executed by one or more processors, the Bluetooth device is able to perform the following operations: searching for an available Bluetooth device; receiving notification information sent by the accessible Bluetooth device, the accessible Bluetooth device including the first Bluetooth device, and the notification information of the first Bluetooth device including UUID information of a service supported by the first Bluetooth device; storing and parsing UUID information that indicates a service supported by the first Bluetooth device and that is included in the advertised information of the first Bluetooth device; instructing the Bluetooth host to pair with the first Bluetooth device; causing the Bluetooth host to report the pairing information to the Bluetooth application, the pairing information including UUID information of a service supported by the first Bluetooth device; and establishing a service connection with the first Bluetooth device based on the service UUID information supported by the first Bluetooth device. This method has the advantage that the lengthy service discovery step does not need to be performed when the Bluetooth device establishes a service connection with the first Bluetooth device, so that the connection time is shortened and the power consumption of the Bluetooth device is reduced.

[0006] In a possible implementation, the advertised information is a Bluetooth low energy alert. This method has the advantage that time and power consumption for a Bluetooth Low Energy connection can be further reduced. For example, the Bluetooth device is assumed to be a smartphone. When a smartphone and a Bluetooth headset are connected in the Bluetooth low energy connection method, the power consumption of the Bluetooth headset can be effectively reduced and the use time of the Bluetooth headset can be extended.

[0007] In another possible implementation, the advertised information is extended polling response information. An advantage of this method is that the service discovery process during a classic Bluetooth connection is time-consuming and error-prone; however, in this method, the Bluetooth device receives the UUID information by using the advertised information, so that the service discovery process can be effectively eliminated, and the error probability of the classic Bluetooth connection can be reduced.

[0008] In another possible implementation, the UUID information of the service supported by the first Bluetooth device includes the UUID information of the Hands-Free Voice Profile (HFP) and Advanced Audio Distribution Profile (A2DP). The advantage of this method is that at the moment the audio transmission mainly depends on the classic Bluetooth connection, but the power consumption of the classic Bluetooth connection is relatively high, and therefore for a small Bluetooth device, such as a Bluetooth headset, the usage time strongly affected; however, if the audio transmission is performed in the Bluetooth low energy connection method, the use time of the Bluetooth headset can be effectively extended.

[0009] With respect to the first aspect, the Bluetooth device may be a smartphone.

[0010] According to a second aspect, an embodiment of this application provides another Bluetooth device, including: a Bluetooth module configured to communicate with another Bluetooth device, the Bluetooth module further including one or more processors; and a storage device including instructions. When the instructions are executed by one or more processors, the Bluetooth device is able to perform the following operations: sending notification information, the notification information including UUID information of a service supported by the Bluetooth device; receiving a pairing request of the first Bluetooth device; pairing with the first Bluetooth device in response to the pairing request of the first Bluetooth device; receiving a connection request for providing services of the first Bluetooth device, the connection request for providing services of the first Bluetooth device includes part or all of the UUID information of a service supported by the Bluetooth device; and establishing a service connection with the first Bluetooth device in response to the service connection request of the first Bluetooth device. The advantage of this method is that the above Bluetooth device adds the UUID information of the service supported by the Bluetooth device to the advertised information, so that the first Bluetooth device that receives the advertised information of the above Bluetooth device does not have to perform the discovery process. services to request UUID information of a service supported by the Bluetooth device from the above Bluetooth device. This can effectively reduce connection time and power consumption.

[0011] In a possible implementation, the advertised information is a Bluetooth low energy alert. This method has the advantage that time and power consumption for a Bluetooth Low Energy connection can be further reduced. For example, the Bluetooth device is assumed to be a Bluetooth headset. When a smartphone and a Bluetooth headset are connected in the Bluetooth low energy connection method, the power consumption of the Bluetooth headset can be effectively reduced and the use time of the Bluetooth headset can be extended.

[0012] In another possible implementation, the advertised information is extended polling response information. An advantage of this method is that the service discovery process during a classic Bluetooth connection is time-consuming and error-prone; however, in this method, the Bluetooth device receives the UUID information by using the advertised information, so that the service discovery process can be effectively eliminated, and the error probability of the classic Bluetooth connection can be reduced.

[0013] In another possible implementation, the UUID information of the service supported by the first Bluetooth device includes the UUID information of the Hands-Free Voice Profile (HFP) and Advanced Audio Distribution Profile (A2DP). The advantage of this method is that at the moment the audio transmission mainly depends on the classic Bluetooth connection, but the power consumption of the classic Bluetooth connection is relatively high, and therefore for a small Bluetooth device, such as a Bluetooth headset, the usage time strongly affected; however, if the audio transmission is performed in the Bluetooth low energy connection method, the use time of the Bluetooth headset can be effectively prolonged.

[0014] With respect to the second aspect, the Bluetooth device may be a Bluetooth headset.

[0015] According to a third aspect, an embodiment of this application provides a Bluetooth communication method applied to a Bluetooth device. A Bluetooth device includes a Bluetooth host and a Bluetooth application. The method includes: searching for an available Bluetooth device; receiving notification information sent by the accessible Bluetooth device, the accessible Bluetooth device including the first Bluetooth device, and the notification information of the first Bluetooth device including UUID information of a service supported by the first Bluetooth device; storing and parsing UUID information that indicates a service supported by the first Bluetooth device and that is included in the advertised information of the first Bluetooth device; instructing the Bluetooth host to pair with the first Bluetooth device; causing the Bluetooth host to report the pairing information to the Bluetooth application, the pairing information including UUID information of a service supported by the first Bluetooth device; and establishing a service connection with the first Bluetooth device based on the service UUID information supported by the first Bluetooth device. This method has the advantage that the lengthy service discovery step does not need to be performed when the Bluetooth device establishes a service connection with the first Bluetooth device, so that the connection time is shortened and the power consumption of the Bluetooth device is reduced.

[0016] In a possible implementation, the advertised information is a Bluetooth low energy alert. This method has the advantage that time and power consumption for a Bluetooth low energy connection can be further reduced. For example, the Bluetooth device is assumed to be a smartphone. When a smartphone and a Bluetooth headset are connected in the Bluetooth low energy connection method, the power consumption of the Bluetooth headset can be effectively reduced and the usage time of the Bluetooth headset can be extended.

[0017] In another possible implementation, the advertised information is extended polling response information. An advantage of this method is that the service discovery process during a classic Bluetooth connection is time-consuming and error-prone; however, in this method, the Bluetooth device receives the UUID information by using the advertised information, so that the service discovery process can be effectively eliminated, and the error probability of the classic Bluetooth connection can be reduced.

[0018] In another possible implementation, the UUID information of the service supported by the first Bluetooth device includes the UUID information of the Hands-Free Voice Profile (HFP) and the Advanced Audio Distribution Profile (A2DP). The advantage of this method is that at the moment the audio transmission mainly depends on the classic Bluetooth connection, but the power consumption of the classic Bluetooth connection is relatively high, and therefore for a small Bluetooth device, such as a Bluetooth headset, the usage time strongly affected; however, if the audio transmission is performed in the Bluetooth low energy connection method, the use time of the Bluetooth headset can be effectively extended.

[0019] With respect to the third aspect, the Bluetooth device may be a smartphone.

[0020] According to a fourth aspect, an embodiment of this application provides another Bluetooth communication method applied to a Bluetooth device. The method includes: sending notification information, the notification information including UUID information of a service supported by the electronic device; receiving a pairing request of the first Bluetooth device; pairing with the first Bluetooth device in response to the pairing request of the first Bluetooth device; receiving a connection request for providing services of the first Bluetooth device, the connection request for providing services of the first Bluetooth device includes part or all of the UUID information of a service supported by the Bluetooth device; and establishing a service connection with the first Bluetooth device in response to the service connection request of the first Bluetooth device. The advantage of this method is that the above Bluetooth device adds the UUID information of the service supported by the Bluetooth device to the advertised information, so that the first Bluetooth device that receives the advertised information of the above Bluetooth device does not have to perform the discovery process. services to request UUID information of a service supported by the Bluetooth device from the above Bluetooth device. This can effectively reduce connection time and power consumption.

[0021] In a possible implementation, the advertised information is a Bluetooth low energy alert. This method has the advantage that time and power consumption for a Bluetooth Low Energy connection can be further reduced. For example, the Bluetooth device is assumed to be a Bluetooth headset. When a smartphone and a Bluetooth headset are connected in the Bluetooth low energy connection method, the power consumption of the Bluetooth headset can be effectively reduced and the use time of the Bluetooth headset can be extended.

[0022] In another possible implementation, the advertised information is extended polling response information. An advantage of this method is that the service discovery process during a classic Bluetooth connection is time-consuming and error-prone; however, in this method, the Bluetooth device receives the UUID information by using the advertised information, so that the service discovery process can be effectively eliminated, and the error probability of the classic Bluetooth connection can be reduced.

[0023] In another possible implementation, the UUID information of the service supported by the first Bluetooth device includes the UUID information of the Hands-Free Voice Profile (HFP) and Advanced Audio Distribution Profile (A2DP). The advantage of this method is that at the moment the audio transmission mainly depends on the classic Bluetooth connection, but the power consumption of the classic Bluetooth connection is relatively high, and therefore for a small Bluetooth device, such as a Bluetooth headset, the usage time strongly affected; however, if the audio transmission is performed in the Bluetooth low energy connection method, the use time of the Bluetooth headset can be effectively prolonged.

[0024] With respect to the fourth aspect, the Bluetooth device may be a Bluetooth headset.

[0025] According to a fifth aspect, an embodiment of this application provides a system including a first Bluetooth device and a second Bluetooth device. The second Bluetooth device includes a second Bluetooth application and a second Bluetooth host. The first Bluetooth device is configured to send notification information, and the notification information includes UUID information of a service supported by the first Bluetooth device. The second Bluetooth host is configured to perform the following operations: searching for an available Bluetooth device, and receiving notification information sent by the accessible Bluetooth device, wherein the accessible Bluetooth device includes the first Bluetooth device, and the notification information of the first Bluetooth device includes the UUID information of the service supported by the first Bluetooth device; storing and parsing UUID information that indicates a service supported by the first Bluetooth device and that is included in the advertised information of the first Bluetooth device; and sending a pairing request to the first Bluetooth device. The first Bluetooth device is further configured to perform the following operations: receiving a pairing request of the second Bluetooth device; and pairing with the second Bluetooth device in response to the pairing request of the second Bluetooth device. The second Bluetooth device is further configured to perform the following operations: causing the second Bluetooth host to report pairing information to the second Bluetooth application, the pairing information including UUID information of a service supported by the first Bluetooth device; and sending a service connection request to the first Bluetooth device based on the UUID information of the service supported by the first Bluetooth device. The first Bluetooth device is further configured to perform the following operations: receiving a connection request for providing services to the second Bluetooth device; and establishing a service connection with the second Bluetooth device in response to receiving a service connection request of the second Bluetooth device. This method has the advantage that neither the first Bluetooth device nor the second Bluetooth device need necessarily perform a service discovery process, and a service connection can be established directly.

[0026] In a possible implementation, the advertised information is a Bluetooth low energy alert. This method has the advantage that time and power consumption for a Bluetooth Low Energy connection can be further reduced. For example, the Bluetooth device is assumed to be a Bluetooth headset. When a smartphone and a Bluetooth headset are connected in the Bluetooth low energy connection method, the power consumption of the Bluetooth headset can be effectively reduced and the use time of the Bluetooth headset can be extended.

[0027] In another possible implementation, the advertised information is extended polling response information. An advantage of this method is that the service discovery process during a classic Bluetooth connection is time-consuming and error-prone; however, in this method, the Bluetooth device receives the UUID information by using the advertised information, so that the service discovery process can be effectively eliminated, and the error probability of the classic Bluetooth connection can be reduced.

[0028] In another possible implementation, the UUID information of the service supported by the first Bluetooth device includes the UUID information of the Hands-Free Voice Profile (HFP) and Advanced Audio Distribution Profile (A2DP). The advantage of this method is that at the moment the audio transmission mainly depends on the classic Bluetooth connection, but the power consumption of the classic Bluetooth connection is relatively high, and therefore for a small Bluetooth device, such as a Bluetooth headset, the usage time strongly affected; however, if the audio transmission is performed in the Bluetooth low energy connection method, the use time of the Bluetooth headset can be effectively prolonged.

[0029] Regarding the fifth aspect, the first Bluetooth device may be a Bluetooth headset, and the second Bluetooth device may be a smartphone.

[0030] According to a sixth aspect, an embodiment of this application provides a Bluetooth chip, including: a storage device configured to store a program; and a processor configured to execute the program stored in the storage device. The program can implement the functions of a Bluetooth host and a Bluetooth application, so that the Bluetooth chip performs the following operations: searches for an available Bluetooth device; receiving notification information sent by the accessible Bluetooth device, the accessible Bluetooth device including the first Bluetooth device, and the notification information of the first Bluetooth device including UUID information of a service supported by the first Bluetooth device; storing and parsing UUID information that indicates a service supported by the first Bluetooth device and that is included in the advertised information of the first Bluetooth device; instructing the Bluetooth host to pair with the first Bluetooth device; causing the Bluetooth host to report the pairing information to the Bluetooth application of the electronic device, the pairing information including UUID information of a service supported by the first Bluetooth device; and establishing a service connection with the first Bluetooth device based on the service UUID information supported by the first Bluetooth device. This method has the advantage that the lengthy service discovery step does not need to be performed when the Bluetooth chip establishes a service connection with the first Bluetooth device, so that the connection time is shortened and the power consumption of the Bluetooth device is reduced.

[0031] In a possible implementation, the advertised information is a Bluetooth low energy alert. This method has the advantage that time and power consumption for a Bluetooth Low Energy connection can be further reduced. For example, a Bluetooth chip is assumed to be used in a smartphone. When a smartphone and a Bluetooth headset are connected in the Bluetooth low energy connection method, the power consumption of the Bluetooth headset can be effectively reduced and the use time of the Bluetooth headset can be extended.

[0032] In another possible implementation, the advertised information is extended polling response information. An advantage of this method is that the service discovery process during a classic Bluetooth connection is time-consuming and error-prone; however, in this method, the Bluetooth chip receives the UUID information by using the advertised information, so that the service discovery process can be effectively eliminated, and the error probability of the classic Bluetooth connection can be reduced.

[0033] In another possible implementation, the UUID information of the service supported by the first Bluetooth device includes the UUID information of the Hands-Free Voice Profile (HFP) and Advanced Audio Distribution Profile (A2DP). The advantage of this method is that at the moment the audio transmission mainly depends on the classic Bluetooth connection, but the power consumption of the classic Bluetooth connection is relatively high, and therefore for a small Bluetooth device, such as a Bluetooth headset, the usage time strongly affected; however, if the audio transmission is performed in the Bluetooth low energy connection method, the use time of the Bluetooth headset can be effectively extended.

[0034] According to a seventh aspect, an embodiment of this application provides another Bluetooth chip, including: a storage device configured to store a program; and a processor configured to execute a program stored in the memory so that the Bluetooth chip performs the following operations: sending notification information, the notification information including UUID information of a service supported by the electronic device; receiving a pairing request of the first Bluetooth device; pairing with the first Bluetooth device in response to the pairing request of the first Bluetooth device; receiving a connection request for providing services of the first Bluetooth device, the connection request for providing services of the first Bluetooth device includes part or all of the UUID information of a service supported by the Bluetooth device; and establishing a service connection with the first Bluetooth device in response to the service connection request of the first Bluetooth device. The advantage of this method is that the above Bluetooth chip adds the UUID information of the service supported by the Bluetooth device to the advertised information, so that the first Bluetooth device that receives the advertised information of the above Bluetooth device does not need to perform a discovery process. services to request UUID information of a service supported by the Bluetooth device from the above Bluetooth device. This can effectively reduce connection time and power consumption.

[0035] In a possible implementation, the advertised information is a Bluetooth low energy alert. This method has the advantage that time and power consumption for a Bluetooth Low Energy connection can be further reduced. For example, a Bluetooth device is assumed to be applied to a Bluetooth headset. When a smartphone and a Bluetooth headset are connected in the Bluetooth low energy connection method, the power consumption of the Bluetooth headset can be effectively reduced and the use time of the Bluetooth headset can be extended.

[0036] In another possible implementation, the advertised information is extended polling response information. An advantage of this method is that the service discovery process during a classic Bluetooth connection is time-consuming and error-prone; however, in this method, the Bluetooth device receives the UUID information by using the advertised information, so that the service discovery process can be effectively eliminated, and the error probability of the classic Bluetooth connection can be reduced.

[0037] In another possible implementation, the UUID information of the service supported by the first Bluetooth device includes the UUID information of the Hands-Free Voice Profile (HFP) and the Advanced Audio Distribution Profile (A2DP). The advantage of this method is that at the moment the audio transmission mainly depends on the classic Bluetooth connection, but the power consumption of the classic Bluetooth connection is relatively high, and therefore for a small Bluetooth device, such as a Bluetooth headset, the usage time strongly affected; however, if the audio transmission is performed in the Bluetooth low energy connection method, the use time of the Bluetooth headset can be effectively prolonged.

Brief description of the drawings

[0038] FIG. 1A shows a Bluetooth protocol stack according to an embodiment of this application;

[0039] FIG. 1B shows a schematic block diagram of a Bluetooth device according to an embodiment of this application;

[0040] Fig. 1C shows a method for connecting a Bluetooth device according to an embodiment of this application;

[0041] FIGS. 1D-1F show a Bluetooth connection process according to an embodiment of this application;

[0042] Figure 2 shows an existing Bluetooth connection method;

[0043] Figure 3 shows a Bluetooth connection method according to an embodiment of this application;

[0044] Figure 4 shows another Bluetooth connection method according to an embodiment of this application; and

[0045] FIG. 5 shows the structure of a Bluetooth low energy alert according to an embodiment of this application.

Detailed description of embodiments

[0046] The following describes in detail and clearly the technical solutions in the embodiments of this application with reference to the accompanying drawings.

[0047] The Bluetooth device provided in the embodiments of this application may be a Bluetooth low energy device, or may be a classic Bluetooth device, or may be a Bluetooth device that supports both classic Bluetooth technology and Bluetooth technology. low power consumption. The Bluetooth device may be a mobile phone, a tablet computer, a desktop computer, a laptop computer, an ultra mobile personal computer (ultra mobile personal computer, UMPC), a PDA, a netbook, a personal digital device (personal digital device, PDA), a Bluetooth wearable device, a virtual reality style device, and the like. This is not particularly limited in the embodiments of the present invention. Bluetooth devices connect with each other via Bluetooth to form a network. The connection initiator is the master (master node) and the connection receiver is the slave (slave node). All devices share the master's clock signal.

[0048] The Bluetooth technology provided in the embodiments of this application is a short-range wireless communication standard and operates in the unlicensed 2.4 GHz frequency band. Bluetooth may include classic Bluetooth technology (Basic Rate/Enhanced Data Rate, BR/EDR) and Bluetooth Low Energy Technology (Bluetooth Low Energy Technology, BLE). Classical Bluetooth technology may also be referred to as conventional Bluetooth technology or standard Bluetooth technology. Classical Bluetooth technology is developed and improved on the basis of Bluetooth previous protocol versions 1.0, 1.2, 2.0+EDR, 2.1+EDR, 3.0+HS of the Bluetooth specification, etc., and is a common name after the emergence of Bluetooth low energy technology. Bluetooth low energy technology, also referred to as the Bluetooth Smart standard, is developed from Nokia's Wibree standard and is initially introduced in protocol version 4.0 of the Bluetooth specification. The power consumption of Bluetooth low energy technology is 1/10 or less of that of classic Bluetooth technology. Bluetooth low energy technology is distinguished by short packet, efficient coding, short connection establishment time, etc. Bluetooth technology can simultaneously transmit voice and data, and use circuit-switched and packet-switched technologies to support asynchronous data links, voice channels and channels for simultaneous transmission of asynchronous data and synchronous voice. Bluetooth has two types of link: non-asynchronous link (Asynchronous Link, ACL) and synchronous link (Synchronous Link, SCO).

[0049] FIG. 1A shows a Bluetooth protocol stack 100 according to an embodiment of the present invention. The Bluetooth protocol stack 100 is used to specify the behavior of mutual communication between Bluetooth devices. The Bluetooth device discovers and uses, through the use of the Bluetooth protocol stack, a service that can be provided by a nearby Bluetooth device. The Bluetooth protocol stack 100 allows devices manufactured by different Bluetooth equipment manufacturers to establish a Bluetooth connection and communicate with each other. The Bluetooth protocol stack 100 specifies a layered communication architecture and various protocols to handle communication between two Bluetooth devices so as to realize the specified service.

[0050] The protocol specified in the Bluetooth protocol stack 100 can be divided into three virtual processing units: a Bluetooth application 110 (Bluetooth application), a host 121 (host), and a controller 122 (controller). One or more controllers 122 may be provided. A protocol in the physical layer of a Bluetooth connection is mainly provided, which includes a physical layer (physical layer, PHY) and a link layer (link layer, LL). Typically, there is only one host 121, and host 121 is configured to connect Bluetooth application 110 to controller 122. Host 121 is typically developed and maintained by a Bluetooth software vendor, and controller 122 is typically provided by a Bluetooth equipment manufacturer. Host 121 and controller 122 may run on the same processor or may run on different processors. The processor may be a Bluetooth chip or may be a CPU.

[0051] Communication and interaction between the host 121 and the controller 122 is completed via the host controller interface (Host Controller Interface, HCI). The host-controller interface provides a standardized interface for communication between the host 121 and the controller 122 and mainly performs two tasks: 1. Sending a command to the controller and receiving an event from the controller. 2. Sending and receiving data from another Bluetooth device. Briefly, the controller 122 is responsible for the transmission of data at the physical layer. The Bluetooth application 110 sends an instruction to the host 121 as required. The host 121 converts the instruction of the Bluetooth application 110 and sends a signal to the controller 122 via the host-controller interface. Thus, the developer of a Bluetooth application does not have to worry about implementing Bluetooth in the physical layer.

[0052] In the classic Bluetooth protocol, the host 121 may include a logical link control and adaptation protocol (logical link control and adaptation, L2CAP), a service discovery protocol (Service Discovery Protocol, SDP), and a generic access profile (generic access profile, gap).

[0053] SDP is the base protocol in the Bluetooth protocol system. A Bluetooth device can acquire another Bluetooth device's service and service characteristics only by using SDP, and establish a connection with each other based on SDP. Through this protocol, a Bluetooth application can discover the available service and service characteristics. A service includes one or more characteristics. For example, the heart rate detection service provided by the Huawei bracelet includes two features: one is used to describe location information of the heart rate sensor, and the other is used to measure heart rate data. The service characteristics include at least two attributes: one is used to declare information such as the data type of the attributes, and the other is used to store the attribute data. An attribute is a piece of labeled data that can be addressed. An attribute type is identified by a universally unique identifier (universally unique identifier, UUID). Each attribute has a corresponding UUID, and the UUID is used to identify different characteristics. The UUID may be 16 bits in short format, or may be 128 bits in full format. In other words, SDP specifies the UUID corresponding to each service. By using the UUID information, Bluetooth devices that share the same set of UUID information can discover the corresponding service and perform operations such as reading and writing. For example, the heart rate detection service provided by the Huawei wristband includes two features, each feature has a corresponding UUID, and the Huawei phone also uses identical UUIDs to identify the two features. When the Huawei phone receives the UUID of the heart rate detection service sent by the Huawei bracelet, it indicates that the Huawei bracelet supports the heart rate detection service.

[0054] L2CAP combines various channels into a data stream, for example, segments an upper-layer service data unit (SDU) into smaller protocol data units (Protocol Data Units, PDU) and segments each PDU into data packets to send data packets to the baseband layer and transmit data packets over the air interface. In addition, L2CAP further provides buffer management to ensure link availability and this quality of service (QoS). The baseband layer is used to indicate or implement a service connection and a physical layer program in a Bluetooth connection, support real-time voice data exchange, and the like between Bluetooth devices.

[0055] The GAP is responsible for device access mode processing and a process including device discovery, link establishment, link termination, security function activation, and device configuration.

[0056] In a protocol based on Bluetooth low energy technology, the host 121 includes L2CAP, Attribute Protocol (Attribute Protocol, ATT), General Attribute Profile (General Attribute Protocol, GATT) (hereinafter referred to as "GATT"), Security Manager Protocol (security manager, SMP) and GAP. For L2CAP and GAP functions, see L2CAP and GAP in Classic Bluetooth Technology.

[0057] In the ATT protocol, a Bluetooth device that provides data is referred to as a server, and a Bluetooth device that receives data is referred to as a client. The server may be a master or may be a slave. For example, a Bluetooth connection is established between a Huawei phone and a Huawei bracelet, and during Bluetooth connection, the Huawei phone is the master device and the Huawei bracelet is the slave device. When the Huawei wristband provides data to the Huawei phone, the Huawei wristband is the server and the Huawei phone is the client. However, when the Huawei phone is providing data to the Huawei wristband, the Huawei phone is the server and the Huawei wristband is the client.

[0058] ATT defines how the client obtains and uses the attribute. The control commands of the ATT protocol include "request", "response", "command", "notify", "indicator", and "acknowledge".

[0059] GATT is a new level designed for Bluetooth low energy technology. GATT builds on ATT, establishes some common operations and infrastructures for ATT protocol transmission and data storage, specifies services (service) and service characteristics (characteristic), and specifies how to use the ATT protocol to detect, read, write, and receive information associated with these services to facilitate use through the Bluetooth application. These services and capabilities are consistent with the services and capabilities in classic Bluetooth technology and can be identified through the use of different UUIDs. The UUIDs corresponding to the capabilities may be UUIDs specified by a Bluetooth Specific Direction Group (SIG) or may be UUIDs specified by a device manufacturer. If the UUIDs specified by the device manufacturer are used, the client and server can only identify each other when the same UUID is used. For example, the Huawei phone uses the UUID set by the Bluetooth referral ad hoc group to identify the heart rate detection service, and the Huawei wristband uses the UUID set by Huawei to identify the heart rate detection service. In this case, when receiving the UUID of the heart rate service sent by the Huawei bracelet, the Huawei phone cannot match the UUID with the heart rate service.

[0060] When a service connection is established between a client and a server, data can be transmitted based on characteristics. For example, the server has the electricity quantity information service, and the electricity quantity information service has a plurality of characteristics. It is assumed that the current electricity amount of the server is 80%, and the value of 80% is stored in the electricity amount characteristic of the electricity amount information service. The client reads 80% data in the electricity quantity characteristic by using the UUID of the electricity quantity characteristic.

[0061] SMP is used to manage the security of the Bluetooth connection and specifies the implementation of pairing and key distribution. Specifically, during the pairing process, the Bluetooth device must obtain a shared key through negotiation and then uses the key to encrypt, through the use of an encryption algorithm, the data to be transmitted subsequently. The data actually transmitted by the Bluetooth device over the air is encrypted data. After receiving the data, the Bluetooth device must use the key obtained through negotiation in order to receive the correct data.

[0062] Based on the channel provided by the logical link control and adaptation protocol, the Bluetooth application 110 identifies the Bluetooth device during communication, identifies the quality of service (QoS), and manages any of the other functions associated with the host. Bluetooth application 110 includes Bluetooth profiles such as Handsfree Profile (HFP) for voice, Advanced Audio Distribution Profile (A2DP) for high quality audio streaming, and the like.

[0063] FIG. 1B is a schematic block diagram of a Bluetooth device according to an embodiment of the present invention. The Bluetooth device may be the first Bluetooth device or the second Bluetooth device in the method for connecting Bluetooth devices in the embodiments of the present invention.

[0064] As shown in FIG. 1B, the Bluetooth device 130 may include components such as a processor 910, a storage device 920, a power source 930, a Bluetooth chip 940, an audio circuit 950, an I/O subsystem 960, a display 970, a sensor 980; and another input device 990. Those skilled in the art may understand that the structure shown in FIG. 1B does not constitute a limitation on the structure of the Bluetooth device in this embodiment of the present invention. The Bluetooth device in this embodiment of the present invention may include more or fewer components than the components shown in the drawing, or combine some components or split some components, or have different arrangements of components.

[0065] Next, each component of the Bluetooth device 130 will be specifically described with reference to FIG. 1B.

[0066] The processor 910 is the control center of the Bluetooth device 130, connects parts of the entire mobile terminal through the use of various interfaces and lines, and through the launch or execution of a software program and/or module stored in the storage device 920, and activating the data stored in the storage device 920, performs various functions of the Bluetooth device 130, and processes the data to perform general monitoring for the mobile terminal. Optionally, processor 910 may include one or more processors or processing modules. Preferably, an application processor (application processor, AP) and a modem processor may be integrated in the processor 910. The AP mainly handles the operating system, user interface, application program, and the like. The modem processor mainly handles wireless communications. In this embodiment of the present invention, the processor 910 may further include a graphics processing unit (GPU). This is not specifically limited in the present invention. To implement the solutions of the present invention, a Bluetooth module is further integrated in the processor 910 to implement related functions such as Bluetooth connection and data transfer.

[0067] The storage device 920 may be configured to store a firmware program and a module. The processor 910 executes various functional applications of the Bluetooth device 130 and processes data by executing the firmware and module stored in the storage device 920. The storage device 920 may mainly include a program storage area and a data storage area. The program storage area may store an operating system, an application program required by at least one function (for example, a Bluetooth or Bluetooth connection control function), and the like. The data storage area may store data (such as a ciphertext generating algorithm and Bluetooth connection record) created based on the use of the Bluetooth device 130, and the like. one magnetic disk storage device, flash memory, or other volatile solid state storage device.

[0068] A power source 930, such as a battery, may supply power to each component. using a power management system.

[0069] The Bluetooth device 130 may further include a Bluetooth chip 940. In this embodiment of the present invention, the Bluetooth chip 940 may include a BLE controller 941, a classic Bluetooth controller 942, and a transceiver 943. BLE the controller 941 and the classic Bluetooth controller 942 can realize the sending and receiving of the Bluetooth RF signal by controlling the transceiver 943. For example, the BLE controller 941 can control the transceiver 943 to send and receive a BLE notification packet, and The classic Bluetooth controller 942 can control the transceiver 943 to send and receive a classic Bluetooth connection request and response, and the like. The Bluetooth device 130 can control the BLE controller 941 and the classic Bluetooth controller 942 in a Bluetooth chip 940 through the use of a Bluetooth module in the processor 910.

[0070] The Bluetooth chip 940 may pre-store a portion of the data, such as pre-store the Bluetooth signal strength threshold and the address, ciphertext, or other identification of the target Bluetooth terminal to be connected. The Bluetooth chip 940 may also independently perform some simple processing, such as detecting the signal strength of the Bluetooth associated message and/or comparing the detected signal strength with a pre-stored signal strength threshold, parsing the Bluetooth associated message, such as a notification packet, matching an address , ciphertext, or other identification data in a Bluetooth-related message with relevant information previously stored, and the like.

[0071] Obviously, the BLE controller 941 and the classic Bluetooth controller 942 may be independent hardware modules, or may be simply logically independent modules, and the hardware is integrated together. Additionally, it is clear that the Bluetooth chip 940 may belong to the category of the processor 910. In addition, the Bluetooth device 130 may not have a separate Bluetooth chip. The circuit and function associated with the Bluetooth chip 940 may be integrated in the processor 910, for example, may be integrated in the AP of a mobile phone or a watch. In this case, the Bluetooth module integrates all functional modules that are related to the implementation of the Bluetooth function and which are described above.

[0072] Audio circuit 250 may include a microphone and speaker and provide an audio interface between a user and Bluetooth device 130. Audio circuit 950 may output audio data to a Bluetooth module or Bluetooth chip 940 to send audio data to another terminal or output audio data received from Bluetooth module or Bluetooth chip 940, user, etc.

[0073] The I/O subsystem 960 is configured to control an external input and output device and may include an input controller from other devices, a sensor controller, and a display controller.

[0074] The terminal may include a display 970. The display 970 may be configured to display user input or information provided to the user and various menus of the Bluetooth device 130, and may further receive user input. In particular, the display 970 may include a display panel 971 and a touch panel 972. The display controller in the input/output subsystem 960 may receive a signal from the display 970 and/or send a signal to the display 970 to implement human-machine interaction.

[0075] The Bluetooth device 130 may further include one or more sensors 980 such as a light sensor, a motion sensor, and another sensor. A sensor controller in I/O subsystem 960 may receive a signal from one or more sensors 980 and/or send a signal to one or more sensors 980.

[0076] Another input module 990 may be configured to receive input digital or character information and generate an input key signal associated with user configuration and functional control of Bluetooth device 130. One or more input controllers from other devices receive a signal from another device 990 input and/or send a signal to another input device 990.

[0077] Although not shown in FIG. 1B, RF circuitry may be included in the Bluetooth device 130 and configured to receive and send a signal in the process of receiving and sending information or processing calls. The Bluetooth device 130 may further include a camera, a high-quality wireless communication module (high-quality wireless communication standard, Wi-Fi, or Wi-Fi), an infrared communication module, and the like. Details are not described here.

[0078] It should be understood that the Bluetooth device 130 in this embodiment of the present invention may be a processor, or a processor with the necessary auxiliary circuit and an auxiliary component, or a chip, or a chip group including a plurality of chips, or the like.

[0079] FIG. 1C shows a connection method for a Bluetooth device according to an embodiment of the present invention. For example, Bluetooth device 130 may be a master device and Bluetooth device 140 may be a slave device. The Bluetooth device 140 provides a service to the host device 130 via a Bluetooth connection, for example, the Bluetooth device 140 can provide services such as call answering and audio playback. The Bluetooth device 130 and the Bluetooth device 140 communicate according to the known Bluetooth communication standard. It should be understood that the master device and the slave device in the embodiments of the present invention are merely an example, and any device having a Bluetooth function can use the technical solutions provided in the embodiments of the present invention.

[0080] FIGS. 1D-1F show a Bluetooth connection process. For example, Bluetooth device 130 may be a smartphone. As shown in FIG. 1D, the Bluetooth device 130 displays a settings screen, and the settings screen includes functions such as "airplane mode", "WLAN", "Bluetooth", and "mobile network". The user taps the Bluetooth function to go to the Bluetooth function screen shown in FIG. 1E. As shown in FIG. 1E, the Bluetooth functional screen includes "on/off", "paired devices", and "available devices". When the user drags the on/off icon to turn on the Bluetooth function, the Bluetooth device 130 turns on the Bluetooth function and can then detect the surrounding Bluetooth device to be connected. For example, as shown in FIG. 1E, after the Bluetooth device 130 turns on the Bluetooth function, the Bluetooth device 130 starts scanning for surrounding available slave devices, and then displays the scanned available slave devices on the screen shown in FIG. 1E. For example, the Huawei Bluetooth headset icon is displayed below "available devices", and in this case, the Huawei Bluetooth headset does not connect. As shown in FIG. 1E, when the user quickly touches the Huawei Bluetooth headset icon, the Bluetooth device 130 establishes a Bluetooth connection with the Huawei Bluetooth headset. When a connection is established, the Bluetooth device 130 displays the screen shown in FIG. 1F. In this case, a Bluetooth connection is established between the Huawei Bluetooth headset and the Bluetooth device.

[0081] Figure 2 shows an existing Bluetooth connection method. The Bluetooth connection method is applicable to classic Bluetooth connection and Bluetooth low energy connection. It should be understood that for ease of description, the Bluetooth connection method shown in FIG. 2 does not show all the steps of a Bluetooth connection, and each step shown in FIG. 2 may further include one or more steps.

[0082] The specific steps are as follows:

[0083] S201. Detection of surrounding connected slave device.

[0084] After the master device and the slave device turn on the Bluetooth function, the master device receives information from the slave device and detects the surrounding slave device to be connected. In other words, at this stage, the master device searches for a nearby available Bluetooth device. For example, the host device is a mobile phone. As shown in FIG. 1E, after the user drags the on/off icon to turn on the Bluetooth function, the mobile phone turns on the Bluetooth function. In some embodiments, after turning on the Bluetooth function, the mobile phone shown in FIG. 1E receives the announcement data of the Huawei Bluetooth headset and then displays the title information included in the announcement data. For example, the name information included in the alert data may be a Huawei Bluetooth headset. At this time, the mobile phone detects the Huawei Bluetooth headset.

[0085] S202. Pairing.

[0086] After the master device detects the slave device, the master device must pair with one slave device according to the user's choice or a preset rule. There are mainly four pairing methods based on Bluetooth technology: numerical comparison, passcode entry, "just get started" and out-of-band (out-of-band, OOB). The numeric comparison indicates that both matched sides display a number, for example, having six digits, and the user checks whether or not the numbers are matched. "Just Get Started" is a simple pairing method indicated by a protocol based on the Bluetooth standard. Thus, pairing can be completed between Bluetooth devices without user intervention, and this method is applicable to a case in which the slave device does not have a display function. For example, a Bluetooth headset does not have a display and may use the "just get started" pairing method. Entering the passkey password indicates that the number (eg, having six digits) displayed on the master is to be entered on the slave. If the entered number is correct, the slave can pair with the master. OOB indicates that the master device and the secondary device exchange pairing information in a non-Bluetooth connection based method, such as NFC.

[0087] The pairing process may include establishing an ACL connection over a logical link with an asynchronous connection, exchanging pairing characteristics, generating keys, and distributing keys. The master and slave can communicate using an ACL connection. The pairing characteristic exchange indicates that, the master device and the slave device notify each other of the pairing function supported by the master device and the slave device. For example, when the slave device is a Bluetooth headset, the pairing method based on the passkey input cannot be supported. Key generation and key distribution indicate that the two parties agree on an encryption mode and share a key.

[0088] For example, as shown in FIG. 1E, after the user quickly touches the Huawei Bluetooth headset icon, the mobile phone is paired with the Huawei Bluetooth headset, and the user does not need to perform additional operation. In this case, the Huawei Bluetooth headset stops paging outward. When the Huawei Bluetooth Headset is paired with a mobile phone, another Bluetooth device cannot detect the Huawei Bluetooth Headset.

[0089] S203. Performing service discovery.

[0090] After the master device and the slave device pair with each other, the service discovery process must be performed. The service discovery process indicates that, the master discovers a service supported by the slave. In the steps above, only a secure communication channel is established between the master and the slave. In this case, the master does not know the service provided by the slave, and the master must further know the service provided by the slave in order to establish an appropriate connection for providing services. As described above, a service includes one or more characteristics, and each characteristic corresponds to a UUID. The master device can discover, by using the UUID, the service provided by the secondary device and communicate.

[0091] S204. Establishing a connection to provide services.

[0092] After the service discovery process is completed, the master device knows the service provided by the slave device, and can select the appropriate service according to the instruction of the user or application to establish a connection for providing services. Connection establishment for a heartbeat detection service is used as an example if the master device is a mobile phone and the secondary device is a wristband. After the service discovery process is completed, a connection for a heartbeat service is established between the mobile phone and the wristband. The mobile phone sends read information to the wristband, where the read information includes a UUID of a heart rate service. After receiving the read information, the bracelet detects the heart rate service data based on the heart rate service UUID, and then sends the read response information to the mobile phone, the read response information includes the heart rate service data.

[0093] In the existing Bluetooth connection method, both classic Bluetooth technology and Bluetooth low energy technology require a service discovery process in the connection process, a master device and a slave device must perform many interactions in the service discovery process. As a result, the service discovery process is time consuming, and problems easily arise due to the large number of interaction processes. Therefore, in this embodiment of the present invention, the slave device can simultaneously send the service UUID information to the master device in step S201, so that the service discovery process in S203 is eliminated.

[0094] FIG. 3 shows a Bluetooth connection method according to an embodiment of the present invention. The Bluetooth connection method is based on the classic Bluetooth connection. It should be understood that the Bluetooth connection method shown in this embodiment of the present invention does not show all steps of a Bluetooth connection, and each step shown in FIG. 3 may further include one or more steps.

[0095] S301. Poll start.

[0096] The Bluetooth host application instructs the host host to start polling to poll for a nearby pairing Bluetooth device. For example, when a user wants to search for a Bluetooth headset by using a mobile phone, the user can drag the Bluetooth on/off icon on the screen shown in FIG. 1E to initiate sending a polling start command to the Bluetooth application. The Bluetooth application sends a polling instruction to the host according to the command, and the host starts polling for the surrounding Bluetooth device being connected.

[0097] S302. Performing a survey.

[0098] The host host starts scanning for polling as instructed by the Bluetooth application of the host. The host master unit sends a polling message at a specific interval so that the surrounding connected slave can receive the polling message sent by the master. The polling message may be a polling access code, where the polling access code can be further classified into a general polling access code (general polling access code, GIAC) and a dedicated polling access code (dedicated polling access code, DIAC). The general polling passcode is used to poll for all paired Bluetooth devices, and the dedicated polling passcode is used to poll for a dedicated Bluetooth device type.

[0099] It should be noted that after receiving the polling response information sent by the slave, the master host does not stop sending the polling information. The host host only stops sending polling information upon receiving a pairing start instruction sent by the host's Bluetooth application.

[00100] S303. Submit an extended survey response.

[00101] The slave device changes the monitoring frequency in the specified interval in the connected state. After receiving a GIAC or DIAC, the slave sends a frequency hopping (FHS) sequence. A frequency hopping sequence (FHS) may include a device address and clock information to help a slave device communicate with a master device. In order to reduce the number of interactions and shorten the interaction time, the slave device sends an extended polling response (extended polling result, EIR) message to convey the specified data. For example, the EIR information may include information such as a slave device name, service UUID, and manufacturer information. Thus, after receiving the EIR information sent by the slave, the master does not need to send query information to the slave again to query the slave to send information such as the name of the slave. It should be noted that, provided that a polling message sent by the master is received, all connected slaves surrounding the master can send EIR information to the master when the standard conditions of the polling message are satisfied. Therefore, the master device can receive EIR information sent by at least one slave device.

[00102] In this embodiment of the present invention, after receiving the GIAC or DIAC, the slave device sends EIR information, and the EIR information may include the UUID information of the service provided by the slave device. For example, the master device is a mobile phone and the slave device is a Bluetooth headset. The Bluetooth headset can add Bluetooth Audio Transfer Service (A2DP) or Bluetooth Hands-Free Service (HFP) UUID information to the EIR information. After receiving the EIR information sent by the Bluetooth headset, the mobile phone host parses the received information according to the Bluetooth protocol stack to obtain the name of the Bluetooth headset and the UUID information of the service supported by the Bluetooth headset, and then reports the UUID information of the service supported by the Bluetooth headset to the Bluetooth application of the mobile phone in the next step. Thus, the mobile phone can know, by using the EIR information sent by the Bluetooth headset, that the Bluetooth headset supports Bluetooth audio transmission service and Bluetooth hands-free service, and know, without a service discovery process, a service that can provided via a Bluetooth headset.

[00103] S304. Saving the poll result.

[00104] After receiving the UUID information of the service provided by the slave device, the host of the master device stores the UUID information in the storage device of the master device. The storage device may be read-only memory (Read Only Memory (ROM)) or Random Access Memory (Random Access Memory, RAM). In conventional technology, at this stage, the master device does not parse or store the service UUID of the secondary device. However, in this embodiment of the present invention, after receiving the EIR information of the slave, the master parses the slave service information included in the EIR information and stores the slave service information in the memory of the master. The host of the master can report the service information of the slave to the Bluetooth application of the master in the next step.

[00105] S305. Poll result message.

[00106] After receiving the slave service UUID information via the EIR information, the host of the master may report the UUID information to the master application at this stage. The service UUID information may include HFP and A2DP UUID information.

[00107] For example, the master host receives, through polling, the UUID information of the services provided by the 10 slaves, and when reporting the polling result, the UUID information of the services provided by the 10 slaves is reported to the Bluetooth application of the master.

[00108] It should be noted that after reporting the polling result, the host host does not stop sending the polling information. If the EIR information sent by the slave is received, step S304 and step S305 are repeatedly executed.

[00109] S306. Start of mating.

[00110] The master's Bluetooth application instructs the master's host to initiate pairing with one slave. For example, the user selects one of the connectable slaves provided on the display of the master to perform pairing. The Bluetooth application of the master device receives an instruction sent by the user to instruct the host of the master device to initiate pairing with a slave device selected by the user.

[00111] S307. Pairing.

[00112] Upon receiving a pairing instruction sent by the master's Bluetooth application, the master's host stops sending the polling message and may establish an asynchronous connection ACL connection over an asynchronous connection to the slave. For the pairing method, see the pairing step S202 shown in FIG.

[00113] S308. Pairing result message.

[00114] After the pairing is successfully performed, the host of the master device reports the result of the pairing to the Bluetooth application of the master device.

[00115] In some embodiments, if the master host does not report the slave service UUID information to the master Bluetooth application in polling result reporting step S305, the master host may also report the UUID information that indicates the paired slave service, and which is stored in the storage device of the host device, in the Bluetooth application of the host device in step S308.

[00116] An advantage of reporting the slave service UUID information in step S308 is that the master host only needs to report the UUID of the slave service that pairs with the master host. However, if the master host reports the service UUID of the slave device in step S305, the master host must report the service UUID information of all slave devices that are discovered by the master device. For example, the host device is a mobile phone. After the mobile phone turns on the Bluetooth function, the Bluetooth host of the mobile phone receives, through polling, the EIR information sent by each of the 20 Bluetooth devices, the EIR information including the UUID information of the service supported by the Bluetooth device. the device that sends the information. Due to the limitation of Bluetooth technology, the mobile phone usually selects one of the 20 Bluetooth devices to pair and then establishes a connection to provide services. Therefore, the Bluetooth application only needs to receive the UUID information of the service provided by the paired Bluetooth device. Therefore, in step S308, when the UUID of the service provided by the slave device is reported, the Bluetooth host needs to report the UUID information of all services provided by only one Bluetooth device to the Bluetooth application.

[00117] S309. Establishing a connection to provide services.

[00118] After the Bluetooth application of the master device receives the pairing result, based on the previously received UUID information of the services of the slave device, the master device can select one service to directly establish a service connection with the slave device, and transmit data to the slave a device without a service discovery process. In some embodiments, after the slave device receives data transmitted by the master device and processes the data based on existing technology, the data can be played through the speaker and transmitted to the user.

[00119] As described above, the power consumption of the Bluetooth low energy technology is 1/10 or less of that of the classic Bluetooth technology, and the Bluetooth low energy technology technology can be used to greatly prolong the uninterrupted usage time of the Bluetooth device. . For example, most Bluetooth headsets that use classic Bluetooth technology to transmit audio information need to be charged after less than three hours of use. By using Bluetooth low energy technology to transmit audio, the Bluetooth headset can work continuously for one day or more. However, in the conventional technology, the service discovery process also exists in the Bluetooth low energy connection process, which not only increases the power consumption of the Bluetooth device, but also prolongs the connection time. Therefore, the user experience is seriously affected. The technical solutions in the embodiments of this application can effectively reduce the power consumption for a Bluetooth low energy connection.

[00120] FIG. 4 shows a Bluetooth low energy connection method according to an embodiment of the present invention.

[00121] As shown in Figure 4, the connection steps are as follows:

[00122] S401. Scan start.

[00123] This step is optional. If the Bluetooth function of the master is in the disabled state, the Bluetooth function of the master must be enabled first. After the Bluetooth feature is enabled, the host's Bluetooth application specifies the host of the host to start scanning. For example, the host device is a mobile phone. When the user wants to search for a Bluetooth headset by using a mobile phone, the user can drag the Bluetooth on/off icon on the screen shown in FIG. 1E to initiate sending a scan start command to the Bluetooth application. The Bluetooth application sends a scan instruction to the host according to the command, and the host device starts receiving the Bluetooth low energy alert (AD) sent by the surrounding Bluetooth pairing device.

[00124] S402. Receives a Bluetooth low energy alert sent by a slave device.

[00125] Bluetooth low energy (BLE) technology defines two types of channels: three announcement channels and 37 data channels. Bluetooth devices may choose, as required, to receive information on different channels. Upon receiving the command to start scanning the master's Bluetooth application, the master's host begins to receive the slave's Bluetooth Low Energy notification on at least one of the three broadcast channels. To further obtain slave data, the master may send SCAN_REQ information of the active scan request.

[00126] S403. Sending a Bluetooth low energy alert via a slave device.

[00127] If the slave device is in a connectable state, the slave device may use at least one of the three notification channels to send a Bluetooth Low Energy notification. In this case, if the master device receives a Bluetooth low energy alert sent by the slave device, the master device can detect the slave device. In some embodiments, the master may further send active scan request information to request the slave to send attachment information, such as device information. After receiving the active scan request information of the master, the slave sends the active scan response information.

[00128] For example, the master device is a mobile phone and the slave device is a Bluetooth headset. After the Bluetooth Low Energy feature is enabled, the Bluetooth headset sends a Bluetooth Low Energy alert through three notification channels, the Bluetooth Low Energy alert including the name of the Bluetooth headset. Thus, after receiving a Bluetooth low energy alert sent by a Bluetooth headset, the mobile phone host parses the received information according to the Bluetooth protocol stack to obtain the name of the Bluetooth headset, and then reports the name of the Bluetooth headset to the Bluetooth application. mobile phone.

[00129] In this embodiment, the slave device may randomly select one or more of the above notification channels to send a Bluetooth Low Energy notification. In the conventional technology, the Bluetooth low energy announcement does not include the UUID of the service provided by the slave device. The master device must obtain, through the use of the specified service discovery process, a function that can be supported by the slave device. However, in this embodiment of the present invention, the slave may carry the service UUID in one of the following fields in the sent Bluetooth Low Energy notification data field: reserved field, idle field, or expandable field in another field, custom field, reserved in the manufacturer field, etc., for example, the UUID of HFP and A2DP. Thus, the service discovery process may be omitted, the power consumption of the connection may be reduced, and the connection time may be shortened.

[00130] In some embodiments, the UUID of the service included in the Bluetooth Low Energy alert sent by the slave may be configured by the device manufacturer. If the master device also includes a custom service UUID, after the master device receives the Bluetooth Low Energy notification of the slave device, the master device can stop scanning and directly establish a service connection with the slave device according to the pre-stored information regarding the slave device to transfer data. This method has the advantage that the scanning time and pairing time of the master can be reduced to further reduce the Bluetooth connection time.

[00131] For steps S404, S405, S406, S407, S408 and S409, see steps S304, S305, S306, S307, S308 and S409 shown in Fig.3. The details are not described again in this document.

[00132] In some embodiments, the master and slave shown in Figure 4 use the "just get started" pairing method.

[00133] In the embodiment of the present invention shown in Figure 4, the slave device adds the UUID of the supported service to the Bluetooth Low Energy announcement so that the master device can receive data to establish a GATT connection when receiving information such as location and the name of the slave device. After receiving the service UUID of the slave device, the master device stores the UUID in the storage device. The host of the master device reports the UUID to the Bluetooth application of the master device at the stage of reporting the scan result or pairing result.

[00134] Next, the structure of the Bluetooth low energy alert according to an embodiment of the present invention will be described with reference to FIG. The Bluetooth low energy notification structure includes a header (header) and payload data (payload data), the payload data includes AdvA and AdvData, and AdvA is a slave address.

[00135] AdvData includes 31 bytes including a significant (significant) part of the data and an insignificant (insignificant) part of the data. A significant part of the data includes several alert data structures (AD structure).

[00136] Each AD structure includes length (length) and data (data) parts. The length part indicates the length of the data. The data part includes an AD type (AD type) and AD data (AD data). The AD type is used to indicate the type of AD data. The AD type may include connection function (flags), slave name (local name), configured data, and so on.

[00137] In this embodiment of the present invention, the slave service UUID may be added to the AD structure, or the slave service UUID may be added to any field of the notification data. This is not limited in this embodiment of the present invention.

[00138] In this embodiment of the present invention, the alert data sent by the slave may be a directional connection indicator ADV_DIRECT_IND, a generic alert indicator ADV_IND, a scanned generic alert indicator ADV_SCAN_IND, and a connectionless alert indicator ADV_NONCONN_IND. The ADV data includes an AD alert data (advertising data) structure.

[00139] An embodiment of this application provides a Bluetooth device. For example, the Bluetooth device may be an intelligent mobile terminal. The Bluetooth device may include a Bluetooth module and a storage device. The technical solutions in the embodiments corresponding to FIGS. 3-5 and their extended embodiments may be implemented in this Bluetooth device. Specifically, the Bluetooth module is configured to communicate with another Bluetooth device, and includes a Bluetooth host and a Bluetooth application. The Bluetooth module further includes one or more processors. The Bluetooth host and the Bluetooth application may run on the same processor or may run on different processors. This is not limited in this embodiment of the present invention. The storage device includes instructions, and when the instructions are executed by the above processor, the above Bluetooth device is able to perform the following operations:

[00140] search for an available Bluetooth device; receiving notification information sent by the accessible Bluetooth device, the accessible Bluetooth device including the first Bluetooth device, and the notification information of the first Bluetooth device including UUID information of a service supported by the first Bluetooth device; storing and parsing UUID information that indicates a service supported by the first Bluetooth device and that is included in the advertised information of the first Bluetooth device; instructing the Bluetooth host to pair with the first Bluetooth device; causing the Bluetooth host to report the pairing information to the Bluetooth application, the pairing information including UUID information of a service supported by the first Bluetooth device; and establishing a service connection with the first Bluetooth device based on the service UUID information supported by the first Bluetooth device.

[00141] An embodiment of this application further provides another Bluetooth device. For example, the Bluetooth device may be a Bluetooth headset, a Bluetooth watch, a Bluetooth bracelet, or the like. The Bluetooth device includes a Bluetooth module and a storage device. The technical solutions in the embodiments corresponding to FIGS. 3-5 and their extended embodiments may be implemented in this Bluetooth device. In particular, the Bluetooth module is configured to communicate with another Bluetooth device and further includes one or more processors. The storage device includes instructions, and when the instructions are executed by the above processor, the above Bluetooth device is able to perform the following operations:

[00142] sending the advertised information, the advertised information including the UUID information of the service supported by the electronic device; receiving a pairing request of the first Bluetooth device; pairing with the first Bluetooth device in response to the pairing request of the first Bluetooth device; receiving a connection request for providing services of the first Bluetooth device, the connection request for providing services of the first Bluetooth device includes part or all of the UUID information of a service supported by the Bluetooth device; and establishing a service connection with the first Bluetooth device in response to the service connection request of the first Bluetooth device.

[00143] An embodiment of this application further provides a system including a first Bluetooth device and a second Bluetooth device, wherein the second Bluetooth device includes a second Bluetooth application and a second Bluetooth host. The first Bluetooth device is configured to send the advertised information, and the advertised information includes UUID information of a service supported by the first Bluetooth device. In some embodiments, the information being advertised is a Bluetooth low energy alert. In some other embodiments, the advertised information is extended polling response information. The second Bluetooth host is configured to perform the following operations: searching for an available Bluetooth device, and receiving the advertised information sent by the accessible Bluetooth device, the accessible Bluetooth device including includes a first Bluetooth device, and the advertised information of the first Bluetooth device includes UUID information of a service supported by the first Bluetooth device; storing and parsing UUID information that indicates a service supported by the first Bluetooth device and that is included in the advertised information of the first Bluetooth device; and sending a pairing request to the first Bluetooth device. It should be noted that searching for an available Bluetooth device may be performed in various ways according to various situations. For example, in the classical Bluetooth connection method, the second Bluetooth host actively sends polling information when searching for an available Bluetooth device, and after receiving the polling information sent by the second Bluetooth host, the surrounding accessible Bluetooth device sends polling response information or extended Bluetooth device information. polling response to the second Bluetooth host. In the Bluetooth low energy connection method, the second Bluetooth host searches the Bluetooth low energy notification channel for a Bluetooth low energy notification sent by an ambient available Bluetooth devices.

[00144] The first Bluetooth device is further configured to perform the following operations: receiving a pairing request of the second Bluetooth device; and pairing with the second Bluetooth device in response to the pairing request of the second Bluetooth device. It should be noted that a plurality of interactions may be envisaged in the process of pairing a first Bluetooth device with a second Bluetooth device.

[00145] The second Bluetooth device is further configured to perform the following operations: causing the second Bluetooth host to report pairing information to the second Bluetooth application, the pairing information including UUID information of a service supported by the first Bluetooth device; and sending a service connection request to the first Bluetooth device based on the UUID information of the service supported by the first Bluetooth device. The first Bluetooth device is further configured to perform the following operations: receiving a connection request for providing services to the second Bluetooth device; and establishing a service connection with the second Bluetooth device in response to receiving a service connection request of the second Bluetooth device.

[00146] An embodiment of this application provides a Bluetooth chip. The technical solutions in the embodiments corresponding to FIGS. 3-5 and their extended embodiments may be implemented in this Bluetooth device. Specifically, the Bluetooth chip includes a storage device configured to store a program; and a processor configured to execute the program stored in the storage device. The program can implement the functions of a Bluetooth host and a Bluetooth application, so that the Bluetooth chip performs the following operations: searches for an available Bluetooth device; receiving broadcast information sent by the accessible Bluetooth device, the accessible Bluetooth device including the first Bluetooth device, and the broadcast information of the first Bluetooth device includes UUID information of a service supported by the first Bluetooth device; storing and parsing UUID information that indicates a service supported by the first Bluetooth device and that is included in the broadcast information of the first Bluetooth device; causing the Bluetooth host to perform a pairing operation with the first Bluetooth device; causing the Bluetooth host to report the pairing information to the Bluetooth application of the electronic device, the pairing information including UUID information of a service supported by the first Bluetooth device; and establishing a service connection with the first Bluetooth device based on the service UUID information supported by the first Bluetooth device.

[00147] An embodiment of this application further provides another Bluetooth chip. The technical solutions in the embodiments corresponding to FIGS. 3-5 and their extended embodiments may be implemented in this Bluetooth device. Specifically, the Bluetooth chip includes a storage device configured to store a program; and a processor configured to execute a program stored in the memory so that the Bluetooth chip performs the following operations: sending broadcast information, the broadcast information including UUID information of a service supported by the electronic device; receiving a pairing request of the first Bluetooth device; establishing a pairing with the first Bluetooth device in response to the pairing request of the first Bluetooth device; receiving a connection request for providing services of the first Bluetooth device, the connection request for providing services of the first Bluetooth device includes part or all of the UUID information of a service supported by the Bluetooth device; and establishing a service connection with the first Bluetooth device in response to the service connection request of the first Bluetooth device.

[00148] Those skilled in the art may be aware that, in combination with the examples described in the embodiments disclosed in this detailed description, the blocks and steps of the algorithm may be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are performed by hardware or software depends on the particular application and associated design constraints. Those skilled in the art may use various methods to implement the described functions for each particular application, but such implementation should not be considered to be outside the scope of the present invention.

[00149] Persons skilled in the art can certainly understand that, for the purposes of convenient and concise description, regarding the detailed working process of the above system, device, and unit, one should refer to the corresponding process in the above method embodiments, and the details are not repeated in this document.

[00150] In several embodiments provided in this application, it should be understood that the disclosed system, equipment, and method may be implemented in other ways. For example, the described embodiment of the equipment is merely an example. For example, the division into blocks is simply a division into logical functions and may represent a different division in the actual implementation. For example, many blocks or components may be combined or integrated into another system, or some features may be ignored or not performed. In addition, displayed or explained reciprocal links or direct links or link connections can be implemented through some interfaces. Indirect connections or communication connections between devices or units may be implemented in electronic, mechanical or other form.

[00151] Blocks described as separate parts may or may not be physically separate, and parts displayed as blocks may or may not be physical blocks, may be located in the same position, or may be distributed over multiple networked blocks. Some or all of the blocks may be selected based on actual requirements in order to achieve the objectives of the solutions of the embodiments.

[00152] In addition, the functional blocks in the embodiments of the present invention may be integrated into a single processor, or each of the blocks may exist separately physically, or two or more blocks are integrated into one block.

[00153] When functions are implemented in the form of a software functional block and sold or used as independent products, the functions may be stored on a computer-readable storage medium. Based on such an understanding, the technical solutions of the present invention as such or a part that makes an improvement in the conventional technology or in some technical solutions can be implemented in the form of a software product. The computer program product is stored on a storage medium and includes several instructions for instructing a computing device (which may be a personal computer, a server, or a network device) to perform all or some of the steps of the methods described in the embodiments of the present invention. The above storage media includes: any media that can store program code, such as USB flash drive, removable hard disk, read only memory (Read Only Memory, ROM), Random Access Memory (Random Access Memory, RAM ), magnetic disk or optical disk.

[00154] The above description is only specific implementations of the present invention and is not intended to limit the scope of protection of the present invention. All changes or substitutions obvious to those skilled in the art within the scope disclosed in the present invention should fall within the protection scope of the present invention. Therefore, the scope of protection of the present invention should depend on the scope of protection of the claims.

Claims (55)

1. Bluetooth device containing: a Bluetooth module configured to communicate with another Bluetooth device; and The Bluetooth module further comprises one or more processors; and a storage device, wherein the storage device contains instructions, and when the instructions are executed by one or more processors, the Bluetooth device is able to perform the following operations: search for an available Bluetooth device; receiving notification information sent by the accessible Bluetooth device, wherein the accessible Bluetooth device includes the first Bluetooth device, and the notification information of the first Bluetooth device contains UUID information of a service supported by the first Bluetooth device; obtaining UUID information which indicates a service supported by the first Bluetooth device and which is contained in the advertised information of the first Bluetooth device; pairing with the first Bluetooth device; and establishing a service connection with the first Bluetooth device based on the service UUID information supported by the first Bluetooth device and received in the advertised information; and skipping execution of the service discovery process, wherein the service discovery process is that the Bluetooth device discovers a service supported by the first Bluetooth device. 2. The Bluetooth device of claim 1, wherein the information to be notified is a Bluetooth Low Energy notification. 3. The Bluetooth device according to claim 1, wherein the notified information is extended polling response information. 4. Bluetooth device according to paragraphs. 1-3, wherein the UUID information of a service supported by the first Bluetooth device contains UUID information of a Hands-Free Voice Profile (HFP) and an Advanced Audio Distribution Profile (A2DP). 5. A Bluetooth communication method applied to a Bluetooth device, and the method comprises: search for an available Bluetooth device; receiving notification information sent by the accessible Bluetooth device, wherein the accessible Bluetooth device includes a first Bluetooth device, and the notification information of the first Bluetooth device contains UUID information of a service supported by the first Bluetooth device; obtaining UUID information which indicates a service supported by the first Bluetooth device and which is contained in the advertised information of the first Bluetooth device; performing pairing with the first Bluetooth device; and establishing a service connection with the first Bluetooth device based on the service UUID information supported by the first Bluetooth device and received in the advertised information; and skipping the execution of the service discovery process, wherein the service discovery process is that the Bluetooth device discovers a service supported by the first Bluetooth device. 6. The method of claim 5, wherein the information being notified is a Bluetooth Low Energy notification. 7. The method of claim 5, wherein the notified information is polling enhanced response information. 8. The method according to paragraphs. 5-7, wherein the UUID information of a service supported by the first Bluetooth device contains UUID information of a Hands-Free Voice Profile (HFP) and an Advanced Audio Distribution Profile (A2DP). 9. A Bluetooth communication system, comprising: first Bluetooth device; and second Bluetooth device; and the first Bluetooth device is configured to send notification information, and the notification information contains UUID information of a service supported by the first Bluetooth device; the second Bluetooth device is configured to perform the following operations: searching for an available Bluetooth device and receiving notification information sent by the accessible Bluetooth device, wherein the accessible Bluetooth device includes the first Bluetooth device, and the notification information of the first Bluetooth device contains UUID information of a service supported by the first Bluetooth device; obtaining UUID information which indicates a service supported by the first Bluetooth device and which is contained in the advertised information of the first Bluetooth device; and sending a pairing request to the first Bluetooth device; the first Bluetooth device is further configured to perform the following operations: receiving a pairing request of the second Bluetooth device; and pairing with the second Bluetooth device in response to the pairing request of the second Bluetooth device; the second Bluetooth device is further configured to perform the following operations: sending a service connection request to the first Bluetooth device based on the service UUID information supported by the first Bluetooth device and received in the advertised information; and skipping execution of the service discovery process, wherein the service discovery process is that the Bluetooth device discovers a service supported by the first Bluetooth device; and the first Bluetooth device is further configured to perform the following operations: receiving a connection request for providing services to the second Bluetooth device; and establishing a service connection with the second Bluetooth device in response to receiving a service connection request of the second Bluetooth device. 10. The system of claim 9, wherein the information being notified is a Bluetooth Low Energy notification. 11. The system of claim 9, wherein the information being notified is polling enhanced response information. 12. The system according to paragraphs. 9-11, in which the UUID information of the service supported by the first Bluetooth device contains the UUID information of the Hands-Free Voice Profile (HFP) and the Advanced Audio Distribution Profile (A2DP). 13. Bluetooth chip containing: a storage device configured to store the program; and a processor configured to execute a program stored in the storage device such that the Bluetooth chip performs the following operations: search for an available Bluetooth device; receiving notification information sent by the accessible Bluetooth device, wherein the accessible Bluetooth device includes the first Bluetooth device, and the notification information of the first Bluetooth device contains UUID information of a service supported by the first Bluetooth device; obtaining UUID information which indicates a service supported by the first Bluetooth device and which is contained in the advertised information of the first Bluetooth device; pairing with the first Bluetooth device; and establishing a service connection with the first Bluetooth device based on the service UUID information supported by the first Bluetooth device and received in the advertised information; and skipping execution of the service discovery process, wherein the service discovery process is that the Bluetooth device discovers a service supported by the first Bluetooth device. 14. The Bluetooth chip of claim 13, wherein the information to be notified is a Bluetooth Low Energy notification. 15. The Bluetooth chip of claim 13, wherein the advertised information is extended polling response information. 16. Bluetooth chip according to paragraphs. 13-15, in which the UUID information of the service supported by the first Bluetooth device contains the UUID information of the Hands-Free Voice Profile (HFP) and the Advanced Audio Distribution Profile (A2DP).

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