WO2020132922A1 - 一种连接蓝牙设备方法及设备 - Google Patents

一种连接蓝牙设备方法及设备 Download PDF

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Publication number
WO2020132922A1
WO2020132922A1 PCT/CN2018/123782 CN2018123782W WO2020132922A1 WO 2020132922 A1 WO2020132922 A1 WO 2020132922A1 CN 2018123782 W CN2018123782 W CN 2018123782W WO 2020132922 A1 WO2020132922 A1 WO 2020132922A1
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Prior art keywords
bluetooth
bluetooth device
information
uuid
service
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PCT/CN2018/123782
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English (en)
French (fr)
Inventor
刘秀华
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华为技术有限公司
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP18944685.9A priority Critical patent/EP3893109B1/en
Priority to CN201880100519.3A priority patent/CN113366439B/zh
Priority to PCT/CN2018/123782 priority patent/WO2020132922A1/zh
Priority to US17/418,293 priority patent/US11856498B2/en
Publication of WO2020132922A1 publication Critical patent/WO2020132922A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/005—Discovery of network devices, e.g. terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
    • H04W84/20—Master-slave selection or change arrangements

Definitions

  • the invention relates to the field of mobile communications, and in particular to a method and device for connecting Bluetooth devices.
  • Bluetooth is a wireless communication technology standard used to allow mobile devices to exchange data over short distances.
  • Bluetooth communication methods there are Classic Bluetooth (Basic Rate/Enhanced Data Rate, BR/EDR) and Bluetooth Low Energy (Bluetooth Low Energe, BLE). Bluetooth low energy can transmit more data with less energy than classic Bluetooth.
  • the Bluetooth device needs to obtain the services that the Bluetooth device can provide through the service discovery process, and determines whether to start the corresponding service connection according to the service information carried in the service discovery interaction information.
  • the service discovery process requires more time and increases the probability of problems.
  • the present application provides a method and device for connecting a Bluetooth device.
  • the technical solution is as follows:
  • an embodiment of the present application provides a Bluetooth device, including: a Bluetooth module for communicating with other Bluetooth devices, wherein the Bluetooth module includes a Bluetooth host and a Bluetooth application; the Bluetooth module further includes one or more A memory; the memory includes instructions, which when executed by the one or more processors cause the Bluetooth device to perform the following operations: search for available Bluetooth devices; receive the available Bluetooth device to send Broadcast information, wherein the available Bluetooth device includes a first Bluetooth device, and the broadcast information of the first Bluetooth device includes UUID information of services supported by the first Bluetooth device; storing and parsing the first Bluetooth device UUID information of services supported by the first Bluetooth device included in the broadcast information of the device; instructing the Bluetooth host to pair with the first Bluetooth device; instructing the Bluetooth host to report pairing information to the Bluetooth application, wherein
  • the pairing information includes UUID information of services supported by the first Bluetooth device; based on UUID information of services supported by the first Bluetooth device, a service connection is established with the first Bluetooth device.
  • the above broadcast information is a Bluetooth low energy broadcast.
  • the advantage of this method is that the time and power consumption of Bluetooth low energy connection can be further reduced.
  • the above-mentioned Bluetooth device is a smart phone
  • the power consumption of the Bluetooth headset can be effectively reduced, and the usage time of the Bluetooth headset can be extended.
  • the foregoing broadcast information is extended query response information.
  • the advantage of this method is that the service discovery process in the classic Bluetooth connection takes a long time and is prone to errors. In this way, the Bluetooth device receives UUID information through broadcast information, which can effectively avoid the service discovery process and reduce the probability of classic Bluetooth connection errors.
  • the UUID information of the service supported by the first Bluetooth device includes voice UUID information of a hands-free profile (HFP) and an advanced audio distribution profile (A2DP).
  • HFP hands-free profile
  • A2DP advanced audio distribution profile
  • the aforementioned Bluetooth device may be a smartphone.
  • an embodiment of the present application provides another Bluetooth device, including: a Bluetooth module for communicating with other Bluetooth devices; the Bluetooth module further includes one or more processors; a memory, including instructions, the instructions When executed by the one or more processors, causes the Bluetooth device to perform the following operations: send broadcast information, the broadcast information includes UUID information of services supported by the Bluetooth device; receive a pairing request of the first Bluetooth device ; In response to the pairing request of the first Bluetooth device, pairing with the first Bluetooth device; receiving the service connection request of the first Bluetooth device, the service connection request of the first Bluetooth device includes the Bluetooth device Part or all of the UUID information of the supported service; in response to the service connection request of the first Bluetooth device, establish a service connection with the first Bluetooth device.
  • the advantage of this method is that the Bluetooth device adds the UUID information of the supported service to the broadcast information, and the first Bluetooth device that receives the broadcast information of the Bluetooth device does not need to go through the service discovery process to request the Bluetooth device
  • the UUID information of the supported services can effectively shorten the connection time and reduce power consumption.
  • the above broadcast information is a Bluetooth low energy broadcast.
  • the advantage of this method is that the time and power consumption of Bluetooth low energy connection can be further reduced.
  • the above-mentioned Bluetooth device is a Bluetooth headset
  • the power consumption of the Bluetooth headset can be effectively reduced, and the usage time of the Bluetooth headset can be extended.
  • the foregoing broadcast information is extended query response information.
  • the advantage of this method is that the service discovery process in the classic Bluetooth connection takes a long time and is prone to errors. In this way, the Bluetooth device receives UUID information through broadcast information, which can effectively avoid the service discovery process and reduce the probability of classic Bluetooth connection errors.
  • the UUID information of the service supported by the first Bluetooth device includes voice UUID information of a hands-free profile (HFP) and an advanced audio distribution profile (A2DP).
  • HFP hands-free profile
  • A2DP advanced audio distribution profile
  • the Bluetooth device may be a Bluetooth headset.
  • an embodiment of the present application provides a Bluetooth communication method applied to a Bluetooth device.
  • the Bluetooth device includes a Bluetooth host and a Bluetooth application.
  • the above method includes: searching for an available Bluetooth device; receiving the available Bluetooth device to send Broadcast information, wherein the available Bluetooth device includes a first Bluetooth device, and the broadcast information of the first Bluetooth device includes UUID information of services supported by the first Bluetooth device; storing and parsing the first Bluetooth device UUID information of the services supported by the first Bluetooth device included in the broadcast information of the device; instructing the Bluetooth host to pair with the first Bluetooth device; instructing the Bluetooth host to report pairing information to the Bluetooth application, wherein the The pairing information includes UUID information of services supported by the first Bluetooth device; and based on UUID information of services supported by the first Bluetooth device, a service connection is established with the first Bluetooth device.
  • the advantage of this method is that the aforementioned Bluetooth device does not need to go through a long service discovery step when establishing a service connection with the first Bluetooth device, which not only shortens the connection time,
  • the above broadcast information is a Bluetooth low energy broadcast.
  • the advantage of this method is that the time and power consumption of Bluetooth low energy connection can be further reduced.
  • the above-mentioned Bluetooth device is a smart phone
  • the power consumption of the Bluetooth headset can be effectively reduced, and the usage time of the Bluetooth headset can be extended.
  • the foregoing broadcast information is extended query response information.
  • the advantage of this method is that the service discovery process in the classic Bluetooth connection takes a long time and is prone to errors. In this way, the Bluetooth device receives UUID information through broadcast information, which can effectively avoid the service discovery process and reduce the probability of classic Bluetooth connection errors.
  • the UUID information of the service supported by the first Bluetooth device includes voice UUID information of a hands-free profile (HFP) and an advanced audio distribution profile (A2DP).
  • HFP hands-free profile
  • A2DP advanced audio distribution profile
  • the aforementioned Bluetooth device may be a smartphone.
  • an embodiment of the present application provides another Bluetooth communication method applied to a Bluetooth device.
  • the above method includes: sending broadcast information, the broadcast information including UUID information of a service supported by the electronic device; receiving the first A pairing request of a Bluetooth device; in response to the pairing request of the first Bluetooth device, pairing with the first Bluetooth device; receiving a service connection request of the first Bluetooth device, the service connection request of the first Bluetooth device includes Part or all of the UUID information of the supported service of the Bluetooth device; in response to a service connection request of the first Bluetooth device, establishing a service connection with the first Bluetooth device.
  • the advantage of this method is that the Bluetooth device adds the UUID information of the supported service to the broadcast information, and the first Bluetooth device that receives the broadcast information of the Bluetooth device does not need to go through the service discovery process to request the Bluetooth device
  • the UUID information of the supported services can effectively shorten the connection time and reduce power consumption.
  • the above broadcast information is a Bluetooth low energy broadcast.
  • the advantage of this method is that the time and power consumption of Bluetooth low energy connection can be further reduced.
  • the above-mentioned Bluetooth device is a Bluetooth headset
  • the power consumption of the Bluetooth headset can be effectively reduced, and the usage time of the Bluetooth headset can be extended.
  • the foregoing broadcast information is extended query response information.
  • the advantage of this method is that the service discovery process in the classic Bluetooth connection takes a long time and is prone to errors. In this way, the Bluetooth device receives UUID information through broadcast information, which can effectively avoid the service discovery process and reduce the probability of classic Bluetooth connection errors.
  • the UUID information of the service supported by the first Bluetooth device includes voice UUID information of a hands-free profile (HFP) and an advanced audio distribution profile (A2DP).
  • HFP hands-free profile
  • A2DP advanced audio distribution profile
  • the aforementioned Bluetooth device may be a Bluetooth headset.
  • an embodiment of the present application provides a system, including: a first Bluetooth device; and a second Bluetooth device, the second Bluetooth device including a second Bluetooth application and a second Bluetooth host; wherein the first Bluetooth The device is configured to send broadcast information including UUID information of services supported by the first Bluetooth device; the second Bluetooth host is configured to perform the following operations: search for available Bluetooth devices and receive all The broadcast information sent by the available Bluetooth device, wherein the available Bluetooth device includes a first Bluetooth device, and the broadcast information of the first Bluetooth device includes UUID information of a service supported by the first Bluetooth device, stored and Parse the UUID information of the service supported by the first Bluetooth device included in the broadcast information of the first Bluetooth device, and send a pairing request to the first Bluetooth device; the first Bluetooth device is also configured to perform the following operations: Receiving the pairing request of the second Bluetooth device; in response to the pairing request of the second Bluetooth device, performing pairing with the second Bluetooth device; the second Bluetooth device is further configured to perform the following operations: instructing the The second Bluetooth host reports pairing information to
  • the above broadcast information is a Bluetooth low energy broadcast.
  • the advantage of this method is that the time and power consumption of Bluetooth low energy connection can be further reduced.
  • the above-mentioned Bluetooth device is a Bluetooth headset
  • the power consumption of the Bluetooth headset can be effectively reduced, and the usage time of the Bluetooth headset can be extended.
  • the foregoing broadcast information is extended query response information.
  • the advantage of this method is that the service discovery process in the classic Bluetooth connection takes a long time and is prone to errors. In this way, the Bluetooth device receives UUID information through broadcast information, which can effectively avoid the service discovery process and reduce the probability of classic Bluetooth connection errors.
  • the UUID information of the service supported by the first Bluetooth device includes voice UUID information of a hands-free profile (HFP) and an advanced audio distribution profile (A2DP).
  • HFP hands-free profile
  • A2DP advanced audio distribution profile
  • the first Bluetooth device may be a Bluetooth headset
  • the second Bluetooth device may be a smartphone.
  • an embodiment of the present application provides a Bluetooth chip, including: a memory for storing a program; a processor for executing a program stored in the memory, the program can implement functions of a Bluetooth host and a Bluetooth application, Causing the Bluetooth chip to perform the following operations: search for available Bluetooth devices; receive broadcast information sent by the available Bluetooth devices, wherein the available Bluetooth devices include a first Bluetooth device, and the broadcast information of the first Bluetooth device Including UUID information of services supported by the first Bluetooth device; storing and parsing UUID information of services supported by the first Bluetooth device included in the broadcast information of the first Bluetooth device; instructing the Bluetooth host and the The first Bluetooth device performs a pairing operation; instructs the Bluetooth host to report pairing information to the Bluetooth application of the electronic device, where the pairing information includes UUID information of services supported by the first Bluetooth device; based on the first The UUID information of the service supported by the Bluetooth device establishes a service connection with the first Bluetooth device.
  • the advantage of this method is that, when establishing a service connection between
  • the above broadcast information is a Bluetooth low energy broadcast.
  • the advantage of this method is that the time and power consumption of Bluetooth low energy connection can be further reduced.
  • the above-mentioned Bluetooth chip is a smart phone
  • the power consumption of the Bluetooth headset can be effectively reduced, and the usage time of the Bluetooth headset can be extended.
  • the foregoing broadcast information is extended query response information.
  • the advantage of this method is that the service discovery process in the classic Bluetooth connection takes a long time and is prone to errors.
  • the Bluetooth chip receives UUID information through broadcast information, which can effectively avoid the service discovery process and reduce the probability of classic Bluetooth connection errors.
  • the UUID information of the service supported by the first Bluetooth device includes voice UUID information of a hands-free profile (HFP) and an advanced audio distribution profile (A2DP).
  • HFP hands-free profile
  • A2DP advanced audio distribution profile
  • an embodiment of the present application provides another Bluetooth chip, including: a memory for storing a program; a processor for executing the program stored in the memory, so that the Bluetooth chip performs the following operations: sending broadcast information ,
  • the broadcast information includes UUID information of services supported by the electronic device; receiving a pairing request of the first Bluetooth device; responding to the pairing request of the first Bluetooth device, pairing with the first Bluetooth device; receiving the The service connection request of the first Bluetooth device, the service connection request of the first Bluetooth device includes part or all of the UUID information of the service supported by the Bluetooth device; in response to the service connection request of the first Bluetooth device, Establishing a service connection with the first Bluetooth device.
  • the advantage of this method is that the Bluetooth chip adds UUID information of the supported services to the broadcast information, and the first Bluetooth device that receives the broadcast information of the Bluetooth device does not need to go through the service discovery process to request the Bluetooth device
  • the UUID information of the supported services can effectively shorten the connection time and reduce power consumption.
  • the above broadcast information is a Bluetooth low energy broadcast.
  • the advantage of this method is that the time and power consumption of Bluetooth low energy connection can be further reduced.
  • the above-mentioned Bluetooth device is a Bluetooth headset
  • the power consumption of the Bluetooth headset can be effectively reduced, and the usage time of the Bluetooth headset can be extended.
  • the foregoing broadcast information is extended query response information.
  • the advantage of this method is that the service discovery process in the classic Bluetooth connection takes a long time and is prone to errors. In this way, the Bluetooth device receives UUID information through broadcast information, which can effectively avoid the service discovery process and reduce the probability of classic Bluetooth connection errors.
  • the UUID information of the service supported by the first Bluetooth device includes voice UUID information of a hands-free profile (HFP) and an advanced audio distribution profile (A2DP).
  • HFP hands-free profile
  • A2DP advanced audio distribution profile
  • FIG. 1A shows a Bluetooth protocol stack according to an embodiment of the present application
  • FIG. 1B shows a schematic block diagram of a Bluetooth device according to an embodiment of the present application
  • FIG. 1C shows a connection method of a Bluetooth device according to an embodiment of the present application
  • 1D to 1F show a Bluetooth connection process according to an embodiment of the present application
  • Figure 2 shows an existing Bluetooth connection method
  • FIG. 3 shows a Bluetooth connection method according to an embodiment of the present application
  • FIG. 4 shows another Bluetooth connection method according to an embodiment of the present application
  • FIG. 5 shows a Bluetooth low energy broadcast structure according to an embodiment of the present application.
  • the Bluetooth device involved in the embodiment of the present application may be a Bluetooth low energy device, a classic Bluetooth device, or a Bluetooth device supporting classic Bluetooth and Bluetooth low energy.
  • the Bluetooth device may be a mobile phone, tablet, desktop, laptop, laptop, ultra-mobile personal computer (Ultra-mobile Personal Computer, UMPC), handheld computer, netbook, personal digital assistant (Personal Digital Assistant, PDA) , Wearable Bluetooth devices, virtual reality devices, Bluetooth headsets, etc., which are not specifically limited in the embodiments of the present invention.
  • the Bluetooth devices are connected to each other through Bluetooth to form a network, where the initiator of the connection is the master device and the receiver is the slave device. All devices share the clock of the master device.
  • Bluetooth is a wireless communication standard for short-range data exchange, and works in the 2.4 GHz unlicensed frequency band.
  • Bluetooth can include classic Bluetooth (Basic Rate/Enhanced Data Rate, BR/EDR) and Bluetooth low energy (Bluetooth Low Energe, BLE).
  • Classic Bluetooth can also be called traditional Bluetooth or standard Bluetooth.
  • Classic Bluetooth is developed and perfected on the basis of the previous Bluetooth specification protocol versions 1.0, 1.2, 2.0+EDR, 2.1+EDR, 3.0+HS and other Bluetooth, and is usually called after the appearance of Bluetooth low energy.
  • Bluetooth low energy also known as Bluetooth Smart, was developed on the Nokia Wibree standard and was introduced in the Bluetooth specification protocol version 4.0.
  • the power consumption of Bluetooth low energy technology is 1/10 or less of that of classic Bluetooth.
  • Bluetooth low energy also has the characteristics of short messages, efficient coding, and short connection establishment time.
  • Bluetooth technology can transmit voice and data at the same time. It uses circuit switching and packet switching technologies to support asynchronous data channels, three-way voice channels, and channels for the simultaneous transmission of asynchronous data and synchronous voice.
  • Bluetooth has two types of links, including asynchronous connectionless (Asynchronous Connectionless Link, ACL) and synchronous connection-oriented (Synchronous Connection Oriented Link, SCO).
  • 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 each Bluetooth device to communicate with each other.
  • Bluetooth devices use the Bluetooth protocol stack to discover and use services that can be provided by nearby Bluetooth devices.
  • the Bluetooth protocol stack 100 allows Bluetooth connections between devices manufactured by different Bluetooth manufacturers and transfers data to each other.
  • the Bluetooth protocol stack 100 specifies a layered data transmission architecture and various protocols to handle data transfer between two Bluetooth devices to achieve specific services.
  • the protocols stipulated by the Bluetooth protocol stack 100 can be divided into three types of virtual processing units: a Bluetooth application 110, a host 121, and a controller 122, where the controller 122 can have one or more, mainly Protocols related to the physical layer of Bluetooth connection, including the physical layer (Physical Layer, PHY) and the link layer (Link Layer, LL).
  • the controller 122 can have one or more, mainly Protocols related to the physical layer of Bluetooth connection, including the physical layer (Physical Layer, PHY) and the link layer (Link Layer, LL).
  • the host 121 is generally developed and maintained by a Bluetooth software manufacturer, and the controller 122 is generally provided by a Bluetooth manufacturer.
  • the host 121 and the controller 122 may run on the same processor, or may run on different processors.
  • the processor can be a Bluetooth chip or a CPU.
  • the communication and interaction between the host 121 and the controller 122 are completed through a host control interface (Host Controller Interface, HCI).
  • HCI Hos Controller Interface
  • the host control interface provides a standardized interface for communication between the host 121 and the controller 122. It mainly completes two tasks: 1. Sending commands to the controller and receiving events from the controller. 2. Send and receive data from other Bluetooth devices.
  • the controller 122 is responsible for data transmission at the physical level.
  • the Bluetooth application 110 issues commands to the host 121 as needed.
  • the host 121 converts the commands of the Bluetooth application 110 and sends signals to the controller 122 through the host control interface. In this way, developers of Bluetooth applications do not need to care about the implementation of the Bluetooth physical layer.
  • 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) .
  • L2CAP Logical Link Control and Adaptation
  • SDP Service Discovery Protocol
  • GAP Generic Access Profile
  • SDP is the core protocol in the Bluetooth protocol system. Only through SDP can Bluetooth devices obtain the services and service features of other Bluetooth devices, and establish a connection between them on this basis. Through this protocol, Bluetooth applications can discover which services are available and the characteristics of the services.
  • the service itself consists of one or more features.
  • the heart rate detection service provided by Huawei Bracelet includes two features, one is used to describe the location information of the heart rate sensor, and the other contains the heart rate measurement data.
  • the characteristics of the service include at least two attributes, one is used to declare the type of attribute data and other information, and the other is used to store attribute data.
  • An attribute refers to a piece of labeled data that can be addressed, and the type of attribute is identified by a universal unified identifier (Universally Unique Identifier, UUID).
  • UUID Universal Identifier
  • Each attribute has a corresponding UUID.
  • the UUID is used to identify different characteristics.
  • the UUID can be 16 bits in short format or 128 bits in full format.
  • SDP specifies the UUID corresponding to each service.
  • Bluetooth devices sharing the same set of UUID information can find the corresponding service and perform operations such as reading and writing.
  • the heart rate detection service provided by Huawei Huawei Bracelet includes two features, each of which has a corresponding UUID, and Huawei Huawei mobile phones also use the same UUID to identify the two features.
  • Huawei Huawei mobile phone receives the UUID of the heart rate detection service sent by Huawei Huawei bracelet, it can be understood that Huawei Huawei bracelet supports heart rate detection service.
  • the L2CAP combines different channels into a data stream.
  • the high-level service data unit (Service) Data Unit (SDU) is cut into smaller protocol data units (Protocol Data Unit, PDU), and the PDU is segmented into data packets for Submitted to the baseband layer and transmitted on the air interface, and also provides buffer management to ensure channel availability and a given quality of service (Quality of Service, QoS).
  • the baseband layer refers to a Bluetooth connection used to specify or implement a service connection and a physical layer program to support real-time voice and data exchange between Bluetooth devices.
  • GAP is responsible for handling device access methods and processes, including device discovery, link establishment, link termination, starting security functions and device configuration
  • the host 121 includes L2CAP, Attribute Protocol (ATT), Generic Attribute Protocol (GATT) (hereinafter referred to as "GATT"), Security Management Protocol (Security Manager , SMP) and GAP.
  • L2CAP Attribute Protocol
  • GATT Generic Attribute Protocol
  • SMP Security Management Protocol
  • GAP GAP
  • the role of L2CAP and GAP can refer to L2CAP and GAP in classic Bluetooth.
  • a Bluetooth device that provides data is called a server, and a Bluetooth device that obtains data is called a client.
  • the server can be a master device or a slave device.
  • a Bluetooth connection is established between a Huawei mobile phone and a Huawei bracelet.
  • the Huawei mobile phone is the master device, and the Huawei bracelet is the slave device.
  • Huawei Bracelet provides data to Huawei mobile phones
  • Huawei Bracelet is the server
  • Huawei Mobile phone is the client.
  • Huawei mobile phones provide data to Huawei bracelets
  • Huawei bracelets are clients and Huawei phones are servers.
  • ATT determines how the client obtains and uses attributes.
  • ATT protocol operation commands include "request”, “response”, “command”, “notification”, “instruction” and “confirmation”.
  • GATT is a newly designed layer for Bluetooth low energy. It is built on the basis of ATT. It establishes some common operations and frameworks for the transmission and storage of data in the ATT protocol. It defines services, characteristics included in services, and Specifies how to use the ATT protocol to discover, read, write, and obtain information associated with these services to facilitate the use of Bluetooth applications.
  • the services and features are consistent with those in classic Bluetooth and can be identified with different UUIDs.
  • the UUID corresponding to the feature may use the UUID defined by the Bluetooth Technology Alliance (SIG) or a UUID customized by the device manufacturer. If a UUID customized by the device manufacturer is used, only the client and server use the same UUID to recognize each other.
  • SIG Bluetooth Technology Alliance
  • the server has a power information service, and the power information service has multiple characteristics. Assuming that the current power of the server is 80%, the value of 80% will exist in the power characteristic of the power information service.
  • the client reads the data of 80% of the power characteristic through the UUID of the power characteristic.
  • SMP is used for Bluetooth connection security management and defines the process of pairing and key distribution. Specifically, during the pairing process, the Bluetooth device needs to negotiate a common key, and then use the key to encrypt subsequent data to be transmitted using this key. The data that the Bluetooth device actually transmits to the air is the encrypted data. After receiving these data, the Bluetooth device needs to use the negotiated key to get the correct data.
  • the Bluetooth application 110 is based on the channel provided by the logical link control and adaptation protocol, identifies the Bluetooth device in communication, identifies the quality of service QoS, and manages any other functions related to the host.
  • the Bluetooth application 110 includes Bluetooth profiles, such as a hands-free profile HFP for voice, an advanced audio distribution profile A2DP for high-quality audio streaming, and so on.
  • 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 the Bluetooth device in the embodiment of the present invention.
  • the Bluetooth device 130 may include a processor 910, a memory 920, a power supply 930, a Bluetooth chip 940, an audio circuit 950, an I/O subsystem 960, a display screen 970, a sensor 980, and other input devices 990.
  • a processor 910 the structure shown in FIG. 1B does not constitute a limitation on the structure of the Bluetooth device in the embodiment of the present invention.
  • the Bluetooth device in the embodiment of the present invention may include more or fewer components than shown in the figure. , Or combine some parts, or split some parts, or arrange different parts.
  • the processor 910 is the control center of the Bluetooth device 130, and uses various interfaces and lines to connect the various parts of the entire mobile terminal, by running or executing the software programs and/or modules stored in the memory 920, and calling the Data, perform various functions and process data of the Bluetooth device 130, thereby performing overall monitoring of the mobile terminal.
  • the processor 910 may include one or more processors or processing modules; preferably, the processor 910 may integrate an application processor (Application Processor, AP) and a modem processor, where the AP mainly processes the operating system , User interface and application programs, the modem processor mainly handles wireless communication.
  • the processor 910 may further include an image processor GPU, which is not specifically limited in the present invention.
  • a Bluetooth module is also integrated in the processor 910 to implement related functions such as Bluetooth connection and data transmission.
  • the memory 920 may be used to store software programs and modules, and the processor 910 executes various functional applications and data processing of the Bluetooth device 130 by running the software programs and modules stored in the memory 920.
  • the memory 920 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, at least one function required application programs (such as Bluetooth control, Bluetooth connection function, etc.), etc.; the storage data area may store according to Bluetooth The data created by the use of the device 130 (such as a ciphertext generation algorithm, a Bluetooth connection record, etc.), etc.
  • the memory 920 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other volatile solid-state storage devices.
  • the power supply 930 can supply power to various components.
  • the power supply may be logically connected to the processor 910 through a power management system, so as to realize functions such as charging, discharging, and power consumption management through the power management system.
  • the Bluetooth device 130 may also include a Bluetooth chip 940.
  • the Bluetooth chip 940 may include a BLE controller 941, a classic Bluetooth controller 942, and a transceiver 943.
  • the BLE controller 941 and the classic Bluetooth controller 942 can transmit and receive Bluetooth radio frequency signals by controlling the transceiver 943, for example: the BLE controller 941 can control the transceiver 943 to send and receive BLE broadcast messages, the classic Bluetooth controller
  • the 942 can control the transceiver 943 to send and receive classic Bluetooth connection requests and responses, and so on.
  • the Bluetooth device 130 can control the BLE controller 941 and the classic Bluetooth controller 942 in the Bluetooth chip 940 through the Bluetooth module in the processor 910.
  • the Bluetooth chip 940 may pre-store some data, such as the pre-stored signal strength threshold value of the Bluetooth signal, the address, cipher text, or other identity of the connectable target Bluetooth terminal.
  • the Bluetooth chip 940 can also perform some simple processing alone, such as detecting the signal strength of Bluetooth-related messages, and/or comparing the detected signal strength with a pre-stored signal strength threshold; parsing Bluetooth-related messages, such as broadcast messages, and Match the address, ciphertext or other identification in the Bluetooth related message with the corresponding pre-stored information, etc.
  • the BLE controller 941 and the classic Bluetooth controller 942 may be independent hardware modules, or may be only logically independent modules, and the hardware is integrated together.
  • the Bluetooth chip 940 may belong to the category of the processor 910.
  • the Bluetooth device 130 may not have a separate Bluetooth chip.
  • the circuits and functions related to the Bluetooth chip 940 may be integrated in the processor 910, such as the AP in a mobile phone or a watch.
  • the Bluetooth module integrates all the functional modules related to the Bluetooth function implementation described above.
  • the audio circuit 250 may include a microphone and a speaker to provide an audio interface between the user and the Bluetooth device 130.
  • the audio circuit 950 may output the audio data to the Bluetooth module or the Bluetooth chip 940 to send to another terminal, or output the audio data acquired from the Bluetooth module or the Bluetooth chip 940 to the user or the like.
  • the I/O subsystem 960 is used to control input and output external devices, and may include other device input controllers, sensor controllers, and display controllers.
  • the terminal may include a display screen 970.
  • the display screen 970 may be used to display information input by the user or information provided to the user and various menus of the Bluetooth device 130, and may also accept user input.
  • the display screen 970 may include a display panel 971 and a touch panel 972.
  • the display controller in the I/O subsystem 960 can receive signals from the display screen 970 and/or send signals to the display screen 970 to realize human-computer interaction.
  • the Bluetooth device 130 may also include one or more sensors 980, such as light sensors, motion sensors, and other sensors.
  • the sensor controller in the I/O subsystem 960 may receive signals from one or more sensors 980 and/or send signals to one or more sensors 980.
  • the other input module 990 may be used to receive input digital or character information, and generate key signal input related to user settings and function control of the Bluetooth device 130.
  • One or more other device input controllers receive signals from other input devices 990 and/or send signals to other input devices 990.
  • the Bluetooth device 130 may also include a radio frequency circuit for receiving and sending signals during sending and receiving information or during a call.
  • the Bluetooth device 130 may further include a camera, a wireless-fidelity (Wi-Fi or WiFi) module, an infrared module, etc., which will not be repeated here.
  • Bluetooth device 130 may refer to a processor or a processor plus necessary auxiliary circuits and auxiliary devices or a chip set composed of one chip or multiple chips, and the like.
  • FIG. 1C shows a connection mode of the Bluetooth device in the embodiment of the present invention.
  • the Bluetooth device 130 may be a master device
  • the Bluetooth device 140 may be a slave device.
  • the Bluetooth device 140 provides services to the main device 130 through a Bluetooth connection, for example, it can provide services such as telephone answering and audio playback.
  • the Bluetooth device 130 and the Bluetooth device 140 exchange data according to known Bluetooth communication standards. It should be understood that the master device and the slave device in the embodiment of the present invention are only exemplary, and any device with Bluetooth function can use the technical solution provided in the embodiment of the present invention.
  • the Bluetooth device 130 may be a smartphone.
  • the Bluetooth device 130 displays a setting interface including functions such as airplane mode, wireless local area network, Bluetooth, and mobile network.
  • the user clicks the Bluetooth function to enter the Bluetooth function interface shown in FIG. 1E.
  • the Bluetooth function interface includes switches, paired devices, and available devices.
  • the Bluetooth device 130 turns on the Bluetooth function, and can find Bluetooth devices that can be connected around.
  • the Bluetooth device 130 starts to scan the available slave devices around, and then displays the scanned available slave devices on the interface shown in FIG.
  • the Huawei Bluetooth headset icon appears below the device. At this time, the Huawei Bluetooth headset is not connected.
  • the Bluetooth device 130 establishes a Bluetooth connection with the Huawei Bluetooth headset.
  • the Bluetooth device 130 displays the interface shown in FIG. 1F, at which time the Huawei Bluetooth headset establishes a Bluetooth connection with the Bluetooth device.
  • FIG. 2 shows an existing Bluetooth connection method, which can be applied to classic Bluetooth and low energy Bluetooth connections. It should be understood that, for convenience of description, the Bluetooth connection method shown in FIG. 2 does not show all the steps of the Bluetooth connection, and each step shown in FIG. 2 may further include one or more steps.
  • the master device After the master device and the slave device respectively turn on the Bluetooth function, the master device receives the information of the slave device and discovers the slave devices that can be connected around. In other words, in this step, the master device searches for available Bluetooth devices around.
  • the main device is a mobile phone, as shown in FIG. 1E, after the user drags the switch icon to start Bluetooth, the mobile phone turns on the Bluetooth function.
  • the mobile phone shown in FIG. 1E receives the broadcast data of the Huawei Bluetooth headset, and then displays the name information included in the broadcast data, for example, the name information included in the broadcast data may be For Huawei Bluetooth headset. At this time, the phone found Huawei Bluetooth headset.
  • Pairing methods based on Bluetooth technology mainly include Numeric Comparison, PassKey Entry, Just Work, and OOB (out-of-band).
  • Numeric Comparison means that both sides of the pairing display a number such as 6 digits, and the user checks the number. Is it consistent.
  • Just Work refers to a simple pairing method stipulated by the Bluetooth standard protocol. This method does not require user intervention and can be paired between Bluetooth devices. It is suitable for the case where the slave device does not have a display function, such as a Bluetooth headset without a display, you can use Just Work matching method.
  • PassKey Entry means that the slave device needs to enter a 6-digit number displayed on the master device, if the input is correct, it can be paired.
  • OOB means that the master device and slave device exchange pairing information through non-Bluetooth connection such as NFC.
  • the pairing process may include establishing an asynchronous connection directed logical link ACL connection, pairing feature exchange, key generation, and key distribution.
  • the master device and the slave device can exchange data through the ACL connection.
  • Pairing feature exchange refers to the master device and the slave device telling each other the pairing function they support. For example, if the slave device is a Bluetooth headset, the PassKey Entry pairing method cannot be supported.
  • Generating and distributing keys refer to the way in which the paired parties negotiate encryption and share the key.
  • the mobile phone is paired with the Huawei Bluetooth headset without further operation by the user.
  • the Huawei Bluetooth headset stops broadcasting.
  • the remaining Bluetooth devices cannot discover the Huawei Bluetooth headset.
  • the service discovery process refers to that the master device discovers the services supported by the slave device.
  • the master device and the slave device only established a secure data exchange channel.
  • the master device does not understand the services provided by the slave device.
  • the master device needs to further understand the services provided by the slave device in order to establish the corresponding service. connection.
  • the service includes one or more features, and each feature has a corresponding UUID. Through the UUID, the master device can find the service provided by the slave device and exchange data.
  • the master device After the service discovery process, the master device understands the services provided by the slave device, and can select the corresponding service according to the user's instruction or application to establish a service connection.
  • the master device is a mobile phone and the slave device is a bracelet.
  • the mobile phone and the bracelet After the service discovery process of the mobile phone and the bracelet, the mobile phone and the bracelet establish a heart rate detection service connection.
  • the mobile phone sends the read information to the bracelet.
  • the read information includes the UUID of the heart rate service.
  • the service is based on the heart rate service. UUID information, find the data of the heart rate service, and then send the read response information to the mobile phone, the read response information includes the data of the heart rate service.
  • the slave device may simultaneously send the UUID information of the service to the master device in step S201, so that the S203 service discovery process is no longer required.
  • FIG. 3 shows a Bluetooth connection method according to an embodiment of the present invention.
  • the Bluetooth connection method is based on a classic Bluetooth connection. It should be understood that the Bluetooth connection mode shown in the embodiment of the present invention does not show all the steps of the Bluetooth connection, and each step shown in FIG. 3 may further include one or more steps.
  • the Bluetooth application of the master device instructs the host of the master device to start querying and querying the Bluetooth devices that can be connected nearby. For example, when a user wants to use a mobile phone to search for a Bluetooth headset, the user can drag the Bluetooth switch icon on the interface shown in FIG. 1E to trigger a command to send a query to the Bluetooth application. According to the command, the Bluetooth application transmits a query instruction to the host, and the master device starts to query the surrounding Bluetooth devices that can be connected.
  • the host of the master device starts the inquiry scan according to the instructions of the Bluetooth application of the master device.
  • the main body of the master device sends a query message at a specific time interval so that the surrounding slave devices can receive the query message sent by the master device.
  • the query message may be a query access code, where the query access code may be further divided into a general query access code (General Inquiry Access Code, GIAC) and a specific query access code (Dedicated Inquiry Access Code, DIAC).
  • GIAC General Inquiry Access Code
  • DIAC Dedicated Inquiry Access Code
  • the host of the master device after receiving the query response information sent from the slave device, the host of the master device will not stop sending query information. Only after receiving the start pairing command sent by the Bluetooth application of the main device, the host of the main device will stop sending the query information.
  • the monitoring frequency is changed at a certain time interval.
  • the slave device receives GIAC or DIAC, it sends the frequency hopping sequence FHS.
  • the frequency hopping sequence FHS may include device address and clock information, so that the slave device exchanges data with the master device.
  • the slave device will send an extended query response message ((Extended Inquiry) Result (EIR) to transmit certain data.
  • EIR extended query response message
  • the EIR information may include the name of the slave device, the UUID of the service, manufacturer data and other information
  • the master device does not need to send request information to the slave device again, requesting the slave device to send its own name and other information.
  • the master device may receive EIR information sent by more than one slave device.
  • the slave device after receiving the GIAC or DIAC, the slave device sends EIR information, and the EIR information may include UUID information of the service provided by the slave device.
  • the master device is a mobile phone and the slave device is a Bluetooth headset.
  • the Bluetooth headset can add the UUID information of the Bluetooth audio transmission service A2DP or the Bluetooth hands-free service HFP to the EIR information.
  • the host of the mobile phone After receiving the EIR information sent by the Bluetooth headset, 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 converts the Bluetooth headset to The UUID information supporting the service is reported to the Bluetooth application of the mobile phone. In this way, the mobile phone can learn from the EIR information sent by the Bluetooth headset that the Bluetooth headset supports the Bluetooth audio transmission service and the Bluetooth hands-free service without having to go through the service discovery process to understand the services that the Bluetooth headset can provide.
  • the host of the master device After obtaining the UUID information of the service provided by the slave device, the host of the master device is stored in the memory of the master device.
  • the memory may be a read-only memory (Read Only Memory, ROM) or a random storage memory (Random Access Memory, RAM).
  • the master device does not parse or store the UUID served by the slave device at this step.
  • the slave device service information contained in the EIR information is parsed and stored in the memory of the master device.
  • the master device master can report the slave device service information to the master device Bluetooth application in a subsequent step.
  • the master device master After the master device master obtains the UUID information of the slave device service through the EIR information, it can report to the master device application in this step.
  • the UUID information of the service may include UUID information of HFP and A2DP.
  • the host of the master device obtains UUID information of services provided by 10 slave devices through query, and reports the UUID information of services provided by the 10 slave devices to the Bluetooth application of the master device when reporting the query result.
  • the master device will not stop sending query information after reporting the query result. If EIR information sent from the slave device is received, steps S304 and S305 will be repeated.
  • the master device Bluetooth application instructs the master device host to initiate pairing with one of the slave devices. For example, the user selects one of the paired slave devices according to the available slave devices provided on the display screen of the master device.
  • the master device Bluetooth application receives an instruction from the user and instructs the master device host to initiate pairing with the slave device selected by the user.
  • the master device After receiving the pairing instruction from the Bluetooth application of the master device, the master device stops sending query messages, and can establish an asynchronous connection directed logical link ACL connection with the slave device.
  • the pairing method refer to the S202 pairing step shown in FIG. 2.
  • the pairing result is reported to the Bluetooth application of the master device.
  • the master device host may also store the UUID information in the memory of the master device in step S308 The UUID information of the paired slave device service is reported to the master device Bluetooth application.
  • the advantage of reporting the UUID information of the slave device service in step S308 is that the master of the master device only needs to report the service UUID of the slave device paired with it. If the master device reports the UUID of the slave device service in step S305, the service UUID information of all the slave devices found by the master device needs to be reported.
  • the main device is a mobile phone. After the mobile phone turns on the Bluetooth function, the Bluetooth host of the mobile phone receives EIR information sent by each of the 20 Bluetooth devices through inquiry, and the EIR information includes services supported by the Bluetooth device that sent the information. UUID information. Due to the limitation of Bluetooth technology, the mobile phone generally selects one of the 20 Bluetooth devices to pair and then establishes a service connection.
  • the Bluetooth application only needs to obtain the UUID information provided by the paired Bluetooth device. Therefore, in step S308, the UUID of the slave device service is reported, and the Bluetooth host only needs to report the UUID information of all services provided by a Bluetooth device to the Bluetooth application.
  • the master device Bluetooth application After the master device Bluetooth application receives the pairing result, the master device can select one of the services to directly establish a service connection with the slave device based on the UUID information received from the slave device service, and transmit data to the slave device without going through the service discovery process.
  • the slave device after the slave device receives the data transmitted by the master device and processes it according to known techniques, it can be broadcasted by the speaker and passed to the user.
  • the power consumption of Bluetooth low energy is 1/10 or less of that of classic Bluetooth.
  • the use of Bluetooth low energy technology can greatly extend the continuous use time of Bluetooth devices. For example, most Bluetooth headsets that use classic Bluetooth technology to transmit audio information require charging for less than three hours of continuous work. If Bluetooth low energy technology is used to transmit audio, Bluetooth headsets can continue to work for a day or longer.
  • the Bluetooth low energy technology also has a service discovery process during the connection process, which not only increases the power consumption of the Bluetooth device, but also increases the connection time, which seriously affects the user experience.
  • the technical solutions of the embodiments of the present application can effectively reduce the power consumption required by the Bluetooth low energy connection.
  • FIG. 4 shows a connection method based on Bluetooth low energy technology according to an embodiment of the present invention.
  • connection steps are as follows:
  • the Bluetooth of the main device is off, you need to first turn on the Bluetooth function of the main device.
  • the master device Bluetooth application instructs the master device host to start scanning.
  • the main device is a mobile phone.
  • the Bluetooth switch icon on the interface shown in FIG. 1E to trigger a command to start scanning to the Bluetooth application.
  • the Bluetooth application communicates the scan command to the host, and the host device starts to receive Bluetooth low energy broadcast (Advertising Data, AD) sent by surrounding Bluetooth devices.
  • AD Bluetooth low energy broadcast
  • Bluetooth low energy BLE Two types of channels, 3 broadcast channels and 37 data channels, are specified in Bluetooth low energy BLE. Bluetooth devices can choose to receive information on different channels as needed. After receiving the instruction to start scanning by the Bluetooth application of the master device, the master device starts to receive the Bluetooth low energy broadcast of the slave device on at least one of the three broadcast channels. In order to further obtain the data of the slave device, the master device can also send an active scan request message SCAN_REQ.
  • the slave device If the slave device is in a connectable state, it can use at least one of the three broadcast channels to send a Bluetooth low energy broadcast. If the master device receives the Bluetooth low energy broadcast sent by the slave device, it can discover the slave device. In some embodiments, the master device may also send active scanning request information to request the slave device to send attachment information, such as device information. After receiving the active scanning request message from the master device, the slave device will send an active scanning response message.
  • the master device is a mobile phone
  • the slave device is a Bluetooth headset.
  • the Bluetooth headset After the low-power Bluetooth function is turned on, the Bluetooth headset sends a low-power Bluetooth broadcast on three broadcast channels.
  • the low-power Bluetooth broadcast includes the name of the Bluetooth headset.
  • the host of the mobile phone 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 of the mobile phone.
  • the slave device can arbitrarily select one or more of the above broadcast channels to send Bluetooth low energy broadcasts.
  • the Bluetooth low energy broadcast does not include the UUID of the service provided by the device.
  • the master device needs to obtain a function that the slave device can support through a special service discovery process.
  • the slave device may carry the UUID of the service in one of the following fields in the transmitted Bluetooth low energy broadcast data field: a free field or an extensible field in a reserved field or other fields, or a manufacturer field Custom fields reserved in, such as the UUID of HFP and A2DP. This can save the service discovery process, reduce connection power consumption, and reduce connection time.
  • the service UUID included in the Bluetooth low energy broadcast sent from the device may be customized by the device manufacturer. If the master device also contains the customized service UUID, when the master device receives the Bluetooth low energy broadcast of the slave device, it can stop scanning, and directly establish a service connection with the slave device for data transmission according to the pre-stored information of the slave device.
  • the advantage of this method is that it can save the scan time and pairing time of the main device, and further shorten the Bluetooth connection time.
  • Steps S404, S405, S406, S407, S408, and step S409 refer to steps S304, S305, S306, S307, S308, and step S409 shown in FIG. 3, and details are not described herein again.
  • the master device and the slave device shown in FIG. 4 adopt the Just Work pairing method.
  • the slave device adds the UUID of the supported service to the Bluetooth low energy broadcast, so that the master device can receive the slave device location, name and other information while obtaining the GATT connection required to establish The data.
  • the master device obtains the UUID of the slave device service, it is stored in the memory.
  • the host of the master device reports to the Bluetooth application of the master device in the step of reporting the scan result or reporting the pairing result.
  • the Bluetooth low energy broadcast structure includes a header and a payload, where the payload includes AdvA and AdvData, and AdvA is the broadcast address of the slave device.
  • AdvData includes 31 bytes, including two parts of significant data (significant) and invalid data (non-significant).
  • the effective data part contains several broadcast data structures (AD Structure).
  • Each AD Structure is composed of length and data, where length represents the length of the data.
  • the data part is composed of AD type (AD Type) and AD data (AD Data).
  • AD Type is used to indicate the type of AD Data.
  • AD Type can include connection function (Flags), slave device name (Local Name), custom data, etc.
  • the UUID of the slave device service may be added to the AD structure, or the UUID of the slave device service may be added to any field of the broadcast data, which is not limited in the embodiment of the present invention.
  • the broadcast data sent from the device may be a directional connection indication ADV_DIRECT_IND, a general broadcast indication ADV_IND, a scannable general broadcast indication ADV_SCAN_IND, an unconnectable broadcast indication ADV_NONCONN_IND.
  • the ADV data includes a broadcast data AD (Advertising Data) structure.
  • the Bluetooth device may be an intelligent mobile terminal.
  • the above-mentioned Bluetooth device may include a Bluetooth module and a memory.
  • the embodiments corresponding to FIGS. 3 to 5 and the technical solutions in their extended embodiments may be implemented in the Bluetooth device.
  • the above Bluetooth module is used to communicate with other Bluetooth devices, including a Bluetooth host and a Bluetooth application.
  • the Bluetooth module further includes one or more processors.
  • the above-mentioned Bluetooth host and the above-mentioned Bluetooth application may run on the same processor or on different processors, which is not limited in the embodiment of the present invention.
  • the memory includes instructions that, when executed by the processor, cause the Bluetooth device to perform the following operations:
  • Searching for available Bluetooth devices receiving broadcast information sent by the available Bluetooth devices, wherein the available Bluetooth devices include a first Bluetooth device, and the broadcast information of the first Bluetooth device includes the first Bluetooth device UUID information of the service; store and parse UUID information of the service supported by the first Bluetooth device included in the broadcast information of the first Bluetooth device; instruct the Bluetooth host to pair with the first Bluetooth device; instruct the The Bluetooth host reports pairing information to the Bluetooth application, where the pairing information includes UUID information of the service supported by the first Bluetooth device; based on the UUID information of the service supported by the first Bluetooth device, the A Bluetooth device establishes a service connection.
  • the Bluetooth device may be a Bluetooth headset, a Bluetooth watch, or a Bluetooth bracelet.
  • the above-mentioned Bluetooth device includes a Bluetooth module and a memory.
  • the embodiments corresponding to FIGS. 3 to 5 and the technical solutions in their extended embodiments may be implemented in the Bluetooth device.
  • the Bluetooth module is used to communicate with other Bluetooth devices, and further includes one or more processors, and the memory includes instructions. When the instructions are executed by the processor, the Bluetooth device performs the following operations:
  • the broadcast information including UUID information of services supported by the Bluetooth device; receiving a pairing request of the first Bluetooth device; in response to the pairing request of the first Bluetooth device, pairing with the first Bluetooth device
  • Receiving the service connection request of the first Bluetooth device the service connection request of the first Bluetooth device includes part or all of the UUID information of the service supported by the Bluetooth device; responding to the service of the first Bluetooth device
  • the connection request establishes a service connection with the first Bluetooth device.
  • An embodiment of the present application further provides a system, including a first Bluetooth device and a second Bluetooth device, where the second Bluetooth device includes a second Bluetooth application and a second Bluetooth host.
  • the first Bluetooth device is configured to send broadcast information, the broadcast information includes UUID information of services supported by the first Bluetooth device; in some embodiments, the broadcast information is a Bluetooth low energy broadcast. In other embodiments, the broadcast information is extended query response information.
  • the above-mentioned second Bluetooth host is configured to perform the following operations: search for available Bluetooth devices, and receive broadcast information sent by the above-mentioned available Bluetooth devices, where the above-mentioned available Bluetooth devices include a first Bluetooth device, and the broadcast of the above-mentioned first Bluetooth device
  • the information includes UUID information of services supported by the first Bluetooth device, stores and parses UUID information of services supported by the first Bluetooth device included in the broadcast information of the first Bluetooth device, and sends a pairing request to the first Bluetooth device ; It should be noted that there are different ways to search for available Bluetooth devices according to different situations.
  • the second Bluetooth host will actively send query information when searching for available Bluetooth devices, and the surrounding available Bluetooth devices will send queries to the second Bluetooth host after receiving the query information sent by the second Bluetooth host Response information or extended query response information.
  • the second Bluetooth host will search for Bluetooth low energy broadcasts sent by available Bluetooth devices around the Bluetooth low energy broadcast channel.
  • the first Bluetooth device is further configured to perform the following operations: receive the pairing request of the second Bluetooth device; respond to the pairing request of the second Bluetooth device, perform pairing with the second Bluetooth device; the first Bluetooth device needs to be explained There may be multiple interactions between the pairing process of the device and the second Bluetooth device.
  • the second Bluetooth device is further configured to perform the following operations: instruct the second Bluetooth host to report pairing information to the second Bluetooth application, the pairing information includes UUID information of services supported by the first Bluetooth device; based on the first The UUID information of the service supported by the Bluetooth device sends a service connection request to the first Bluetooth device; the first Bluetooth device is further configured to perform the following operations: receive a service connection request from the second Bluetooth device; in response to receiving the above The service connection request of the second Bluetooth device establishes a service connection with the second Bluetooth device.
  • the above-mentioned Bluetooth chip includes: a memory for storing a program; a processor for executing the program stored in the memory, the program can realize the functions of a Bluetooth host and a Bluetooth application, so that the Bluetooth chip performs the following operations : Searching for available Bluetooth devices; receiving broadcast information sent by the available Bluetooth devices, wherein the available Bluetooth devices include a first Bluetooth device, and the broadcast information of the first Bluetooth device includes the first Bluetooth device UUID information of supported services; storing and parsing UUID information of services supported by the first Bluetooth device included in the broadcast information of the first Bluetooth device; instructing the Bluetooth host to perform a pairing operation with the first Bluetooth device; Instruct the Bluetooth host to report pairing information to the Bluetooth application of the electronic device, wherein the pairing information includes UUID information of services supported by the first Bluetooth device; based on UUID of services supported by the first Bluetooth
  • the Bluetooth chip includes: a memory for storing programs; a processor for executing the programs stored in the memory, so that the Bluetooth chip performs the following operations: sending broadcast information, the broadcast information including the electronic UUID information of services supported by the device; receiving a pairing request of the first Bluetooth device; responding to the pairing request of the first Bluetooth device, pairing with the first Bluetooth device; receiving a service connection request of the first Bluetooth device ,
  • the service connection request of the first Bluetooth device includes part or all of UUID information of services supported by the Bluetooth device; in response to the service connection request of the first Bluetooth device, a service is established with the first Bluetooth device connection.
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are only exemplary.
  • the division of the unit is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the displayed or discussed mutual couplings or direct couplings or communication connections may be indirect couplings or communication connections through some interfaces, devices or units, and may be typical, mechanical, or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium.
  • the technical solution of the present invention essentially or part of the contribution to the existing technology or part of the technical solution can be embodied in the form of a software product
  • the computer software product is stored in a storage medium, including Several instructions are used to enable a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present invention.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .

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Abstract

本申请公开了一种蓝牙通信系统，包括第一蓝牙设备和第二蓝牙设备，所述第二蓝牙设备包括第二蓝牙应用和第二蓝牙主机；第一蓝牙设备发送广播信息，所述广播信息包括所述第一蓝牙设备所支持的服务的UUID信息；第二蓝牙主机接收第一蓝牙设备的广播信息，所述广播信息包括所述第一蓝牙设备所支持的服务的UUID信息，存储并解析所述UUID信息，向所述第一蓝牙设备发送配对请求；所述第一蓝牙设备与所述第二蓝牙设备执行配对；所述第二蓝牙设指令所述第二蓝牙主机向所述第二蓝牙应用上报配对信息，所述配对信息包括所述第一蓝牙设备所支持的服务的UUID信息；基于所述第一蓝牙设备所支持的服务的UUID信息，以向所述第一蓝牙设备发送服务连接请求；所述第一蓝牙设备还被配置为与所述第二蓝牙设备建立服务连接。

Description

一种连接蓝牙设备方法及设备 技术领域
本发明涉及移动通讯领域，特别是涉及一种连接蓝牙设备的方法及装置。
背景技术
蓝牙是一种无线通讯技术标准，用来让移动设备在短距离间交换数据。蓝牙通信方法中有经典蓝牙(Basic Rate/Enhanced Data Rate，BR/EDR)和低功耗蓝牙(Bluetooth Low Energe，BLE)。低功耗蓝牙相比经典蓝牙能够以更少的能量传输更多的数据。
现有技术中，蓝牙设备在匹配后，需要通过服务发现过程以获取蓝牙设备可以提供的服务，根据服务发现交互信息中携带的服务信息，确定是否启动对应的服务连接。但是服务发现过程需要消耗较多的时间，增加了出现问题的概率。
发明内容
为解决上述技术问题，本申请提供了一种连接蓝牙设备方法及设备。所述技术方案如下：
第一方面，本申请实施例提供了一种蓝牙设备，包括：蓝牙模块，用于与其他蓝牙设备通讯，其中，所述蓝牙模块包括蓝牙主机和蓝牙应用；所述蓝牙模块还包括一个或多个处理器；存储器，所述存储器包括指令，所述指令被所述一个或多个处理器执行时，使得所述蓝牙设备执行以下操作：搜寻可用的蓝牙设备；接收所述可用的蓝牙设备发送的广播信息，其中，所述可用的蓝牙设备包括第一蓝牙设备，所述第一蓝牙设备的广播信息包括所述第一蓝牙设备所支持的服务的UUID信息；存储并解析所述第一蓝牙设备的广播信息中包括的所述第一蓝牙设备所支持的服务的UUID信息；指令所述蓝牙主机与所述第一蓝牙设备配对；指令所述蓝牙主机向所述蓝牙应用上报配对信息，其中所述配对信息包括所述第一蓝牙设备所支持的服务的UUID信息；基于所述第一蓝牙设备所支持的服务的UUID信息，与所述第一蓝牙设备建立服务连接。这种方式的好处在于，上述蓝牙设备与第一蓝牙设备建立服务连接时不再需要经过漫长的服务发现步骤，既缩短了连接时间，又降低了蓝牙设备的功耗。
在一种可能的实现方式中，上述广播信息是低功耗蓝牙广播。这种方式的好处在于，低功耗蓝牙连接的时间和功耗可以进一步减少。例如，假设上述蓝牙设备是智能手机，当智能手机和蓝牙耳机采用低功耗蓝牙连接方式时，可以有效降低蓝牙耳机的功耗，延长蓝牙耳机的使用时间。
在另一种可能的实现方式中，上述广播信息是扩展查询响应信息。这种方式的好处在于，经典蓝牙连接中服务发现过程耗时长，容易出错。这种方式中，蓝牙设备通过广播信息接收UUID信息，可以有效避免服务发现过程，减少经典蓝牙连接出错的概率。
在另一种可能的实现方式中，上述第一蓝牙设备所支持的服务的UUID信息包括语音的免提配置文件(HFP)和高级音频分发配置文件(A2DP)的UUID信息。这种方式的好处在于，目前音频传输主要靠经典蓝牙连接，而经典蓝牙连接的功耗较大，对于小型蓝牙 设备例如蓝牙耳机来说，严重影响使用时间。而采用低功耗蓝牙连接方式传输音频，可以有效延长蓝牙耳机的使用时间。
结合第一方面，上述蓝牙设备可以是智能手机。
第二方面，本申请实施例提供了另一种蓝牙设备，包括：蓝牙模块，用于与其他蓝牙设备通讯；所述蓝牙模块还包括一个或多个处理器；存储器，包括指令，所述指令被所述一个或多个处理器执行时，使得所述蓝牙设备执行以下操作：发送广播信息，所述广播信息包括所述蓝牙设备所支持的服务的UUID信息；接收第一蓝牙设备的配对请求；响应于所述第一蓝牙设备的配对请求，与所述第一蓝牙设备配对；接收所述第一蓝牙设备的服务连接请求，所述第一蓝牙设备的服务连接请求包括所述蓝牙设备所支持的服务的UUID信息的部分或全部；响应于所述第一蓝牙设备的服务连接请求，与所述第一蓝牙设备建立服务连接。这种方式的好处在于，上述蓝牙设备在广播信息中加入了所支持的服务的UUID信息，接收到上述蓝牙设备的广播信息的第一蓝牙设备，不需要经过服务发现过程，向上述蓝牙设备要求所支持的服务的UUID信息，能有效缩短连接时间，以及减少功耗。
在一种可能的实现方式中，上述广播信息是低功耗蓝牙广播。这种方式的好处在于，低功耗蓝牙连接的时间和功耗可以进一步减少。例如，假设上述蓝牙设备是蓝牙耳机，当智能手机和蓝牙耳机采用低功耗蓝牙连接方式时，可以有效降低蓝牙耳机的功耗，延长蓝牙耳机的使用时间。
在另一种可能的实现方式中，上述广播信息是扩展查询响应信息。这种方式的好处在于，经典蓝牙连接中服务发现过程耗时长，容易出错。这种方式中，蓝牙设备通过广播信息接收UUID信息，可以有效避免服务发现过程，减少经典蓝牙连接出错的概率。
在另一种可能的实现方式中，上述第一蓝牙设备所支持的服务的UUID信息包括语音的免提配置文件(HFP)和高级音频分发配置文件(A2DP)的UUID信息。这种方式的好处在于，目前音频传输主要靠经典蓝牙连接，而经典蓝牙连接的功耗较大，对于小型蓝牙设备例如蓝牙耳机来说，严重影响使用时间。而采用低功耗蓝牙连接方式传输音频，可以有效延长蓝牙耳机的使用时间。
结合第二方面，上述蓝牙设备可以是蓝牙耳机。
第三方面，本申请实施例提供了一种应用于蓝牙设备的蓝牙通信方法，所述蓝牙设备包括蓝牙主机和蓝牙应用，上述方法包括：搜寻可用的蓝牙设备；接收所述可用的蓝牙设备发送的广播信息，其中，所述可用的蓝牙设备包括第一蓝牙设备，所述第一蓝牙设备的广播信息包括所述第一蓝牙设备所支持的服务的UUID信息；存储并解析所述第一蓝牙设备的广播信息中包括的第一蓝牙设备所支持的服务的UUID信息；指令所述蓝牙主机与所述第一蓝牙设备配对；指令所述蓝牙主机向所述蓝牙应用上报配对信息，其中所述配对信息包括第一蓝牙设备所支持的服务的UUID信息；基于所述第一蓝牙设备所支持的服务的UUID信息，与所述第一蓝牙设备建立服务连接。这种方式的好处在于，上述蓝牙设备与第一蓝牙设备建立服务连接时不再需要经过漫长的服务发现步骤，既缩短了连接时间，又降低了蓝牙设备的功耗。
在一种可能的实现方式中，上述广播信息是低功耗蓝牙广播。这种方式的好处在于，低功耗蓝牙连接的时间和功耗可以进一步减少。例如，假设上述蓝牙设备是智能手机，当 智能手机和蓝牙耳机采用低功耗蓝牙连接方式时，可以有效降低蓝牙耳机的功耗，延长蓝牙耳机的使用时间。
在另一种可能的实现方式中，上述广播信息是扩展查询响应信息。这种方式的好处在于，经典蓝牙连接中服务发现过程耗时长，容易出错。这种方式中，蓝牙设备通过广播信息接收UUID信息，可以有效避免服务发现过程，减少经典蓝牙连接出错的概率。
在另一种可能的实现方式中，上述第一蓝牙设备所支持的服务的UUID信息包括语音的免提配置文件(HFP)和高级音频分发配置文件(A2DP)的UUID信息。这种方式的好处在于，目前音频传输主要靠经典蓝牙连接，而经典蓝牙连接的功耗较大，对于小型蓝牙设备例如蓝牙耳机来说，严重影响使用时间。而采用低功耗蓝牙连接方式传输音频，可以有效延长蓝牙耳机的使用时间。
结合第三方面，上述蓝牙设备可以是智能手机。
第四方面，本申请实施例提供了另一种应用于蓝牙设备的蓝牙通信方法，上述方法包括：发送广播信息，所述广播信息包括所述电子设备所支持的服务的UUID信息；接收第一蓝牙设备的配对请求；响应于所述第一蓝牙设备的配对请求，与所述第一蓝牙设备配对；接收所述第一蓝牙设备的服务连接请求，所述第一蓝牙设备的服务连接请求包括所述蓝牙设备所述支持的服务的UUID信息的部分或全部；响应于所述第一蓝牙设备的服务连接请求，与所述第一蓝牙设备建立服务连接。这种方式的好处在于，上述蓝牙设备在广播信息中加入了所支持的服务的UUID信息，接收到上述蓝牙设备的广播信息的第一蓝牙设备，不需要经过服务发现过程，向上述蓝牙设备要求所支持的服务的UUID信息，能有效缩短连接时间，以及减少功耗。
在一种可能的实现方式中，上述广播信息是低功耗蓝牙广播。这种方式的好处在于，低功耗蓝牙连接的时间和功耗可以进一步减少。例如，假设上述蓝牙设备是蓝牙耳机，当智能手机和蓝牙耳机采用低功耗蓝牙连接方式时，可以有效降低蓝牙耳机的功耗，延长蓝牙耳机的使用时间。
在另一种可能的实现方式中，上述广播信息是扩展查询响应信息。这种方式的好处在于，经典蓝牙连接中服务发现过程耗时长，容易出错。这种方式中，蓝牙设备通过广播信息接收UUID信息，可以有效避免服务发现过程，减少经典蓝牙连接出错的概率。
在另一种可能的实现方式中，上述第一蓝牙设备所支持的服务的UUID信息包括语音的免提配置文件(HFP)和高级音频分发配置文件(A2DP)的UUID信息。这种方式的好处在于，目前音频传输主要靠经典蓝牙连接，而经典蓝牙连接的功耗较大，对于小型蓝牙设备例如蓝牙耳机来说，严重影响使用时间。而采用低功耗蓝牙连接方式传输音频，可以有效延长蓝牙耳机的使用时间。
结合第四方面，上述蓝牙设备可以是蓝牙耳机。
第五方面，本申请实施例提供了一种系统，包括：第一蓝牙设备；以及第二蓝牙设备，所述第二蓝牙设备包括第二蓝牙应用和第二蓝牙主机；其中所述第一蓝牙设备被配置为，发送广播信息，所述广播信息包括所述第一蓝牙设备所支持的服务的UUID信息；所述第二蓝牙主机被配置为执行以下操作：搜寻可用的蓝牙设备，并接收所述可用的蓝牙设备发送的广播信息，其中，所述可用的蓝牙设备包括第一蓝牙设备，所述第一蓝牙设备的广播 信息包括所述第一蓝牙设备所支持的服务的UUID信息，存储并解析所述第一蓝牙设备的广播信息中包括的第一蓝牙设备所支持的服务的UUID信息，向所述第一蓝牙设备发送配对请求；所述第一蓝牙设备还被配置为执行以下操作：接收所述第二蓝牙设备的配对请求；响应于所述第二蓝牙设备的配对请求，与所述第二蓝牙设备执行配对；所述第二蓝牙设备还被配置为执行以下操作：指令所述第二蓝牙主机向所述第二蓝牙应用上报配对信息，所述配对信息包括所述第一蓝牙设备所支持的服务的UUID信息；基于所述第一蓝牙设备所支持的服务的UUID信息，向所述第一蓝牙设备发送服务连接请求；所述第一蓝牙设备还被配置为执行以下操作：接收所述第二蓝牙设备的服务连接请求；响应于接收到所述第二蓝牙设备的服务连接请求，与所述第二蓝牙设备建立服务连接。这种方式的好处在于，第一蓝牙设备和第二蓝牙设备都不需要经过服务发现过程，可以直接建立服务连接。
在一种可能的实现方式中，上述广播信息是低功耗蓝牙广播。这种方式的好处在于，低功耗蓝牙连接的时间和功耗可以进一步减少。例如，假设上述蓝牙设备是蓝牙耳机，当智能手机和蓝牙耳机采用低功耗蓝牙连接方式时，可以有效降低蓝牙耳机的功耗，延长蓝牙耳机的使用时间。
在另一种可能的实现方式中，上述广播信息是扩展查询响应信息。这种方式的好处在于，经典蓝牙连接中服务发现过程耗时长，容易出错。这种方式中，蓝牙设备通过广播信息接收UUID信息，可以有效避免服务发现过程，减少经典蓝牙连接出错的概率。
在另一种可能的实现方式中，上述第一蓝牙设备所支持的服务的UUID信息包括语音的免提配置文件(HFP)和高级音频分发配置文件(A2DP)的UUID信息。这种方式的好处在于，目前音频传输主要靠经典蓝牙连接，而经典蓝牙连接的功耗较大，对于小型蓝牙设备例如蓝牙耳机来说，严重影响使用时间。而采用低功耗蓝牙连接方式传输音频，可以有效延长蓝牙耳机的使用时间。
结合第五方面，上述第一蓝牙设备可以是蓝牙耳机，第二蓝牙设备可以是智能手机。
第六方面，本申请实施例提供了一种蓝牙芯片，包括：存储器，用于存储程序；处理器，用于执行所述存储器存储的程序，所述程序可以实现蓝牙主机和蓝牙应用的功能，使得所述蓝牙芯片执行以下操作：搜寻可用的蓝牙设备；接收所述可用的蓝牙设备发送的广播信息，其中，所述可用的蓝牙设备包括第一蓝牙设备，所述第一蓝牙设备的广播信息包括所述第一蓝牙设备所支持的服务的UUID信息；存储并解析所述第一蓝牙设备的广播信息中包括的第一蓝牙设备所支持的服务的UUID信息；指令所述蓝牙主机与所述第一蓝牙设备执行配对操作；指令所述蓝牙主机向所述电子设备的蓝牙应用上报配对信息，其中所述配对信息包括所述第一蓝牙设备所支持的服务的UUID信息；基于所述第一蓝牙设备所支持的服务的UUID信息，与所述第一蓝牙设备建立服务连接。这种方式的好处在于，上述蓝牙芯片与第一蓝牙设备建立服务连接时不再需要经过漫长的服务发现步骤，既缩短了连接时间，又降低了蓝牙设备的功耗。
在一种可能的实现方式中，上述广播信息是低功耗蓝牙广播。这种方式的好处在于，低功耗蓝牙连接的时间和功耗可以进一步减少。例如，假设应用上述蓝牙芯片的是智能手机，当智能手机和蓝牙耳机采用低功耗蓝牙连接方式时，可以有效降低蓝牙耳机的功耗，延长蓝牙耳机的使用时间。
在另一种可能的实现方式中，上述广播信息是扩展查询响应信息。这种方式的好处在于，经典蓝牙连接中服务发现过程耗时长，容易出错。这种方式中，蓝牙芯片通过广播信息接收UUID信息，可以有效避免服务发现过程，减少经典蓝牙连接出错的概率。
在另一种可能的实现方式中，上述第一蓝牙设备所支持的服务的UUID信息包括语音的免提配置文件(HFP)和高级音频分发配置文件(A2DP)的UUID信息。这种方式的好处在于，目前音频传输主要靠经典蓝牙连接，而经典蓝牙连接的功耗较大，对于小型蓝牙设备例如蓝牙耳机来说，严重影响使用时间。而采用低功耗蓝牙连接方式传输音频，可以有效延长蓝牙耳机的使用时间。
第七方面，本申请实施例提供了另一种蓝牙芯片，包括：存储器，用于存储程序；处理器，用于执行所述存储器存储的程序，使得所述蓝牙芯片执行以下操作：发送广播信息，所述广播信息包括所述电子设备所支持的服务的UUID信息；接收第一蓝牙设备的配对请求；响应于所述第一蓝牙设备的配对请求，与所述第一蓝牙设备配对；接收所述第一蓝牙设备的服务连接请求，所述第一蓝牙设备的服务连接请求包括所述蓝牙设备所支持的服务的UUID信息的部分或全部；响应于所述第一蓝牙设备的服务连接请求，与所述第一蓝牙设备建立服务连接。这种方式的好处在于，上述蓝牙芯片在广播信息中加入了所支持的服务的UUID信息，接收到上述蓝牙设备的广播信息的第一蓝牙设备，不需要经过服务发现过程，向上述蓝牙设备要求所支持的服务的UUID信息，能有效缩短连接时间，以及减少功耗。
在一种可能的实现方式中，上述广播信息是低功耗蓝牙广播。这种方式的好处在于，低功耗蓝牙连接的时间和功耗可以进一步减少。例如，假设应用上述蓝牙设备是蓝牙耳机，当智能手机和蓝牙耳机采用低功耗蓝牙连接方式时，可以有效降低蓝牙耳机的功耗，延长蓝牙耳机的使用时间。
在另一种可能的实现方式中，上述广播信息是扩展查询响应信息。这种方式的好处在于，经典蓝牙连接中服务发现过程耗时长，容易出错。这种方式中，蓝牙设备通过广播信息接收UUID信息，可以有效避免服务发现过程，减少经典蓝牙连接出错的概率。
在另一种可能的实现方式中，上述第一蓝牙设备所支持的服务的UUID信息包括语音的免提配置文件(HFP)和高级音频分发配置文件(A2DP)的UUID信息。这种方式的好处在于，目前音频传输主要靠经典蓝牙连接，而经典蓝牙连接的功耗较大，对于小型蓝牙设备例如蓝牙耳机来说，严重影响使用时间。而采用低功耗蓝牙连接方式传输音频，可以有效延长蓝牙耳机的使用时间。
附图说明
图1A示出了一种根据本申请实施例的蓝牙协议栈；
图1B示出了一种根据本申请实施例的蓝牙设备的示意性框图；
图1C示出了一种根据本申请实施例的蓝牙设备的一种连接方式；
图1D至图1F示出了一种根据本申请实施例的蓝牙连接过程；
图2示出了一种现有蓝牙连接方式；
图3示出了一种根据本申请实施例的蓝牙连接方式；
图4示出了另一种根据本申请实施例的蓝牙连接方式；
图5示出了一种根据本申请实施例的低功耗蓝牙广播结构。
具体实施方式
下面将结合附图对本申请实施例中的技术方案进行清楚、详尽地描述。
本申请实施例中涉及的蓝牙设备，可以是低功耗蓝牙设备，也可以是经典蓝牙设备，也可以是支持经典蓝牙和低功耗蓝牙的蓝牙设备。所述蓝牙设备可以是手机、平板电脑、桌面型、膝上型、笔记本电脑、超级移动个人计算机(Ultra-mobile Personal Computer，UMPC)、手持计算机、上网本、个人数字助理(Personal Digital Assistant，PDA)、可穿戴蓝牙设备、虚拟现实设备、蓝牙耳机等，本发明实施例对此不做具体的限定。蓝牙设备彼此通过蓝牙连接，形成网络，其中连接发起方为主设备(Master)，接收连接方为从设备(Slave)。所有设备共享主设备的时钟。
本申请实施例涉及的蓝牙，是一种短距离数据交换的无线通信标准，在2.4GHz免授权频段工作。蓝牙可以包括经典蓝牙(Basic Rate/Enhanced Data Rate，BR/EDR)和低功耗蓝牙(Bluetooth Low Energe，BLE)。经典蓝牙，也可称之为传统蓝牙或标准蓝牙。经典蓝牙是在之前的蓝牙规范协议版本1.0、1.2、2.0+EDR、2.1+EDR、3.0+HS等蓝牙基础上发展和完善起来的，是在低功耗蓝牙出现后通常的称呼。低功耗蓝牙也可称为Bluetooth Smart，是在Nokia的Wibree标准上发展起来的，并在蓝牙规范协议版本4.0中开始引入。低功耗蓝牙技术的功耗是经典蓝牙的1/10或更少，同时低功耗蓝牙还具有报文短，编码高效、连接建立时间短等特点。蓝牙技术可以同时可传输语音和数据，采用电路交换和分组交换技术，支持异步数据信道、三路语音信道以及异步数据与同步语音同时传输的信道。蓝牙有两种链路类型，包括异步无连接(Asynchronous Connectionless Link，ACL)和同步面向连接(Synchronous Connection Oriented Link，SCO)。
图1A示出了根据本发明实施例的一种蓝牙协议栈100。蓝牙协议栈100用于规定各个蓝牙设备相互通信的行为。蓝牙设备通过蓝牙协议栈来发现和使用其附近的蓝牙设备可以提供的服务。蓝牙协议栈100允许不同蓝牙制造商制造的设备之间可以进行蓝牙连接并相互传递数据。蓝牙协议栈100规定了分层的数据传输架构和各种协议，来处理两个蓝牙设备之间的数据传递，以实现特定的服务。
蓝牙协议栈100规定的协议可以被分为蓝牙应用(Bluetooth Application)110、主机(Host)121和控制器(Controller)122这三种虚拟处理单元，其中控制器122可以有一个或多个，主要涉及蓝牙连接物理层面的协议，包括物理层(Physical Layer，PHY)和链路层(Link Layer，LL)。主机121一般只有一个，用于连接蓝牙应用110和控制器122。主机121一般由蓝牙软件厂商开发和维护，控制器122一般由蓝牙的制造厂商提供。主机121和控制器122可以在同一个处理器上运行，也可以在不同处理器中运行。处理器可以是蓝牙芯片，也可以是CPU。
主机121和控制器122之间的通信和交互通过主机控制接口(Host Controller Interface，HCI)完成。所述主机控制接口为主机121和控制器122之间的通信提供了一种标准化的接口，其主要完成两个任务：1、发送命令给控制器和接收来自控制器的事件。2、发送和 接收来自其他蓝牙设备的数据。简而言之，控制器122负责物理层面的数据传输，蓝牙应用110根据需要向主机121发出指令，主机121转换蓝牙应用110的指令，通过主机控制接口向控制器122发出信号。这样，蓝牙应用的开发者不用关心蓝牙物理层面的实现方式。
在经典蓝牙协议中，主机121可以包括逻辑链路控制与适配协议(Logical Link Control and Adaptation，L2CAP)、服务发现协议(Service Discovery Protocol，SDP)和通用访问配置文件(Generic Access Profile，GAP)。
其中SDP是蓝牙协议体系中的核心协议，蓝牙设备只有通过SDP才能获得其他蓝牙设备的服务和服务特征，并在此基础上建立相互间的连接。通过这个协议，蓝牙应用可以发现哪些服务可以使用，以及服务的特征。所述服务本身由一个或多个特征组成。例如华为手环提供的心率检测服务，包括两个特征，一个用来描述心率传感器位置信息，另外一个包含测量心率数据。服务的特征至少包括两个属性，一个用于声明属性数据的类型等信息，其余用于存储属性数据。属性指一条带有标签的，可以被寻址的数据，属性的类型用通用统一标识(Universally Unique Identifier，UUID)来标识。每个属性都有对应的一个UUID，所述UUID用来识别不同的特性，UUID可以是短格式16比特，也可以是全格式128比特。换而言之，SDP规定了每种服务所对应的UUID，通过UUID信息，共用同一套UUID信息的蓝牙设备可以找到相应的服务并进行例如读取、写入等操作。例如，华为华为手环提供的心率检测服务包括两个特征，每个特征都有对应的UUID，而华为华为手机也用同样的UUID标识所述两个特征。当华为华为手机接收到华为华为手环发送的心率检测服务的UUID，可以明白华为华为手环支持心率检测服务。
L2CAP将不同的信道组合成为一个数据流，例如将高层服务数据单元(Service Data Unit，SDU)切割成更小的协议数据单元(Protocol Data Unit，PDU)，将PDU分段成数据分组，用于提交至基带层并在空中接口上传输，并且还提供缓冲管理以确保信道的可用性和给定的服务质量(Quality of Service，QoS)。所述基带层指蓝牙连接中用于指定或实施服务连接及物理层程序，以支持蓝牙设备之间进行实时语音、交换数据信息等。
GAP负责处理设备的接入方式和过程，包括设备发现，链路建立，链路终止，启动安全功能和设备配置
在低功耗蓝牙协议中，主机121包括L2CAP、属性协议(Attribute Protocol，ATT)、通用属性配置文件(Generic Attribute Protocol，GATT)(在下文中被称为“GATT”)、安全管理协议(Security Manager，SMP)和GAP。其中L2CAP和GAP的作用可参考经典蓝牙中的L2CAP和GAP。
ATT协议中，将提供数据的蓝牙设备称为服务器，获取数据的蓝牙设备称为客户端。服务器可以是主设备，也可以是从设备。例如，华为手机与华为手环建立蓝牙连接，该蓝牙连接中华为手机为主设备，华为手环为从设备。当华为手环向华为手机提供数据时，华为手环为服务器，华为手机为客户端。而华为手机向华为手环提供数据时，华为手环为客户端，华为手机为服务端。
ATT决定了客户端如何获取和使用属性。ATT协议操作命令包括“请求”、“响应”、“命令”、“通知”、“指示”和“确认”。
GATT是针对低功耗蓝牙新设计的层，在ATT的基础上构建，为ATT协议传输和存 储数据建立了一些通用操作和框架，定义服务(service)、服务所包含的特征(characteristic)，以及规定如何使用ATT协议来发现、读取、写入和获得与这些服务相关联的信息，方便蓝牙应用使用。所述服务和特征与经典蓝牙中的服务和特征一致，可以用不同的UUID来标识。其中，特征对应的UUID可以使用蓝牙技术联盟(SIG)定义的UUID，也可以使用设备厂商自定义的UUID。如果采用设备厂商自定义的UUID，只有客户端和服务器都使用同样的UUID，才能相互识别。例如，华为手机使用蓝牙技术联盟定义的UUID标识心率检测服务，而华为手环使用华为定义的UUID来标识心率检测服务。当华为手机接收到华为手环发送的心率监测服务的UUID，无法将所述UUID与心率检测服务对应起来。
当客户端和服务器建立服务连接，可以通过特征交换数据。例如，服务器有电量信息服务，电量信息服务有多个特征。假设当前服务器的电量为80％，80％这个数值会存在电量信息服务中的电量特征中，客户端通过电量特征的UUID，读取电量特征中80％这个数据。
SMP是用来进行蓝牙连接安全管理的，定义了配对和密钥分发的过程实现。具体而言，蓝牙设备在配对过程中，需要协商共同的密钥，然后将后续要传输的数据用这个密钥通过加密算法进行加密，蓝牙设备实际传送到空中的数据是加密后的数据。蓝牙设备在接收到这些数据后，需要用协商的密钥才能得到正确的数据。
蓝牙应用110基于逻辑链路控制与适配协议提供的信道，识别通信的蓝牙设备，识别服务质量QoS，管理与主机有关的任何其他功能。蓝牙应用110包括蓝牙配置文件，例如用于语音的免提配置文件HFP、用于高质量音频流传输的高级音频分发配置文件A2DP等。
图1B是本发明实施例的蓝牙设备的示意性框图。该蓝牙设备可以为本发明实施例中的用于连接蓝牙设备的方法中的第一蓝牙设备或者第二蓝牙设备。
如图1B所示，蓝牙设备130可包括处理器910、存储器920、电源930、蓝牙芯片940、音频电路950、I/O子系统960、显示屏970、传感器980以及其他输入设备990等部件。本领域技术人员可以理解，图1B中示出的结构并不构成对本发明实施例中的蓝牙设备的结构的限定，本发明实施例中的蓝牙设备可以包括比图示更多或更少的部件，或者组合某些部件，或者拆分某些部件，或者不同的部件布置。
下面结合图1B对蓝牙设备130的各个组成部分进行具体的介绍：
处理器910是蓝牙设备130的控制中心，利用各种接口和线路连接整个移动终端的各个部分，通过运行或执行存储在存储器920内的软件程序和/或模块，以及调用存储在存储器920内的数据，执行蓝牙设备130的各种功能和处理数据，从而对移动终端进行整体监控。可选的，处理器910可包括一个或多个处理器或处理模块；优选的，处理器910可集成应用处理器(Application Processor，AP)和调制解调处理器，其中，AP主要处理操作系统、用户界面和应用程序等，调制解调处理器主要处理无线通信。在本发明实施例中，上述处理器910还可包括图像处理器GPU，对此本发明不作具体限定。为实现本发明方案，处理器910中还集成有蓝牙模块，以实现蓝牙连接与数据传输等相关功能。
存储器920可用于存储软件程序以及模块，处理器910通过运行存储在存储器920的软件程序以及模块，从而执行蓝牙设备130的各种功能应用以及数据处理。存储器920可主要包括存储程序区和存储数据区，其中，存储程序区可存储操作系统、至少一个功能所 需的应用程序(比如蓝牙控制、蓝牙连接功能等)等；存储数据区可存储根据蓝牙设备130的使用所创建的数据(比如密文生成算法、蓝牙连接记录等)等。此外，存储器920可以包括高速随机存取存储器，还可以包括非易失性存储器，例如至少一个磁盘存储器件、闪存器件、或其他易失性固态存储器件。
电源930，比如电池，可以给各个部件供电。优选的，电源可以通过电源管理系统与处理器910逻辑相连，从而通过电源管理系统实现管理充电、放电、以及功耗等功能。
蓝牙设备130还可包括蓝牙芯片940。在本发明实施例中，蓝牙芯片940可包括BLE控制器941、经典蓝牙控制器942和收发器943。BLE控制器941和经典蓝牙控制器942可通过控制收发器943来实现蓝牙射频信号的发送和接收，如：BLE控制器941可控制收发器943来发送和接收BLE广播报文，经典蓝牙控制器942可控制收发器943来发送和接收经典蓝牙连接请求和响应等。蓝牙设备130可通过处理器910中的蓝牙模块，对蓝牙芯片940中的BLE控制器941和经典蓝牙控制器942进行控制。
蓝牙芯片940可预存部分数据，如预存蓝牙信号的信号强度阈值，可连接的目标蓝牙终端的地址、密文或其他身份标识。蓝牙芯片940也可单独进行一些简单的处理，如检测蓝牙相关消息的信号强度，和/或，将检测的信号强度与预存的信号强度阈值进行比较；解析蓝牙相关消息，如广播报文，并将蓝牙相关消息中的地址、密文或其他身份标识与预存的相应信息进行匹配等。
可以理解的是，BLE控制器941和经典蓝牙控制器942可以是独立的硬件模块，也可以只是逻辑上独立的模块，而硬件是集成在一起的。进一步可以理解的是，蓝牙芯片940可属于处理器910的范畴。并且，蓝牙设备130也可没有单独的蓝牙芯片。蓝牙芯片940相关的电路和功能可集成在处理器910中，如可集成在手机或手表的AP中。此时，蓝牙模块集成了上述描述的所有与蓝牙功能实现相关的功能模块。
音频电路250可包括麦克风和扬声器，提供用户与蓝牙设备130之间的音频接口。音频电路950可将音频数据输出至蓝牙模块或蓝牙芯片940以发送给另一终端，或者将从蓝牙模块或蓝牙芯片940获取的音频数据输出给用户等。
I/O子系统960用来控制输入输出的外部设备，可以包括其他设备输入控制器、传感器控制器、显示控制器。
终端可包括显示屏970。显示屏970可用于显示由用户输入的信息或提供给用户的信息以及蓝牙设备130的各种菜单，还可以接受用户输入。具体的，显示屏970可包括显示面板971和触控面板972。I/O子系统960中的显示控制器可从显示屏970接收信号和/或者向显示屏970发送信号，实现人机交互。
蓝牙设备130还可包括一种或多种传感器980，比如光传感器、运动传感器以及其他传感器。I/O子系统960中的传感器控制器可以从一个或者多个传感器980接收信号和/或者向一个或者多个传感器980发送信号。
其他输入模块990可用于接收输入的数字或字符信息，以及产生与蓝牙设备130的用户设置以及功能控制有关的键信号输入。一个或多个其他设备输入控制器从其他输入设备990接收信号和/或者向其他输入设备990发送信号。
尽管在图1B中未示出，蓝牙设备130也可以包括射频电路，用于收发信息或通话过程 中，信号的接收和发送。蓝牙设备130还可以包括摄像头、无线保真(Wireless-Fidelity，Wi-Fi or WiFi)模块、红外线模块等，在此不再赘述。
应理解，实现本发明实施例中的蓝牙设备130可以是指一个处理器或一个处理器加上必要的辅助电路及辅助器件或一个芯片或多个芯片构成的芯片组等。
图1C示出了在本发明实施例中蓝牙设备的一种连接方式。示例性的，蓝牙设备130可以是主设备，蓝牙设备140可以是从设备。蓝牙设备140通过蓝牙连接向主设备130提供服务，例如，可以提供电话接听、音频播放等服务。蓝牙设备130和蓝牙设备140根据已知蓝牙通信标准交换数据。需要理解的是，本发明实施例中的主设备和从设备仅仅是示例性的，任何具有蓝牙功能的设备都可以使用本发明实施例提供的技术方案。
图1D至图1F示出了一种蓝牙连接过程。示例性的，蓝牙设备130可以为智能手机。如图1D所示，蓝牙设备130显示设置界面，所述设置界面包括飞行模式、无线局域网、蓝牙、移动网络等功能。用户点击蓝牙功能，进入如图1E所示的蓝牙功能界面。如图1E所示，蓝牙功能界面包括开关、已配对设备和可用设备。当用户拖动开关图标启动蓝牙，蓝牙设备130开启蓝牙功能，可以发现周围可以连接的蓝牙设备。示例性的，如图1E所示，蓝牙设备130开启蓝牙功能后，蓝牙设备130开始扫描周围可用的从设备，然后将扫描到的可用的从设备显示在图1E所示的界面，例如，可用设备下方出现华为蓝牙耳机图标，此时华为蓝牙耳机处于未连接的状态。如图1E所示，当用户点击华为蓝牙耳机图标，蓝牙设备130与华为蓝牙耳机建立蓝牙连接。当连接完成，蓝牙设备130显示如图1F所示的界面，此时华为蓝牙耳机与蓝牙设备建立了蓝牙连接。
图2示出了一种现有蓝牙连接方式，所述蓝牙连接方式可适用于经典蓝牙和低功耗蓝牙连接。需要理解的是，为方便描述，图2所示的蓝牙连接方式并未示出蓝牙连接的所有步骤，在图2所示的每一个步骤中，还可以包括一个或多个步骤。
具体步骤如下：
S201.发现周围可以连接的从设备
主设备和从设备分别开启蓝牙功能后，主设备接收从设备的信息，发现周围可以连接的从设备。换而言之，该步骤中主设备搜寻周围可用的蓝牙设备。例如，主设备是手机，如图1E所示，用户拖动开关图标启动蓝牙后，手机开启蓝牙功能。在一些实施例中，如图1E所示的手机在开启蓝牙功能后，接收到华为蓝牙耳机的广播数据，然后显示所述广播数据中所包含的名称信息，例如广播数据中包括的名称信息可以为华为蓝牙耳机。此时手机发现了华为蓝牙耳机。
S202.配对
主设备在发现从设备后，需要根据用户的选择或者预先设置的规则，与其中一个从设备进行配对。基于蓝牙技术的配对方式主要有Numeric Comparison、PassKey Entry、Just Work和OOB(out-of-band，带外)四种，其中Numeric Comparison指配对双方都显示一个例如6位的数字，由用户核对数字是否一致。Just Work指蓝牙标准协议规定的一种简易配对方式，该方式不需要用户干预，蓝牙设备之间即可完成配对，适用于从设备没有显示功能的情况，例如蓝牙耳机没有显示屏，可以采用Just Work配对方式。PassKey Entry指从设备需要输入一个在主设备上显示的例如6位数字，如果输入正确即可配对。OOB指主设备和从设备通 过NFC等非蓝牙连接方式交换配对信息。
配对过程可以包括建立异步连接定向逻辑链路ACL连接、配对特征交换、产生密钥和分发密钥。其中，主设备和从设备可以通过所述ACL连接交换数据。配对特征交换指主设备和从设备告诉对方自己支持的配对功能。例如，从设备是蓝牙耳机的情况下，不能支持PassKey Entry的配对方式。产生密钥和分发密钥指配对双方协商加密的方式，并共享密钥。
示例性的，如图1E所示，用户点击华为蓝牙耳机图标后，手机与华为蓝牙耳机进行配对，不需要用户进行进一步操作。此时华为蓝牙耳机停止向外广播，在华为蓝牙耳机与该手机配对期间，其余蓝牙设备不能发现华为蓝牙耳机。
S203.服务发现
主设备与从设备配对后，需要进行服务发现过程，所述服务发现过程指主设备发现从设备所支持的服务。主设备和从设备在前面的步骤只是建立了安全的交换数据的通道，此时主设备并不了解从设备所提供的服务，主设备需要进一步了解从设备所提供的服务，才能建立相应的服务连接。如上文所述，服务包括一个或多个特征，每个特征都有对应的UUID，通过UUID，主设备可以找到从设备提供的服务，并交换数据。
S204.建立服务连接
服务发现过程后，主设备了解从设备所提供的服务，可以根据用户的指令或应用的选择相应的服务，建立服务连接。示例性的，以建立心率检测服务连接为例，主设备是手机，从设备是手环。手机和手环在服务发现过程后，手机与手环建立心率检测服务连接，手机向手环发出读取信息，读取信息包括心率服务的UUID，手环收到读取信息后，根据心率服务的UUID信息，找到心率服务的数据，然后向手机发送读取响应信息，读取响应信息包括心率服务的数据。
现有蓝牙连接方式中，经典蓝牙和低功耗蓝牙在连接过程中都需要服务发现过程，同时主设备和从设备在服务发现过程中需要进行多次交互。这使得服务发现过程花费了很多时间，同时由于交互过程较多，也容易出现问题。因此，本发明实施例中，从设备可以在S201步骤中，同时向主设备发送服务的UUID信息，从而不再需要S203服务发现过程。
图3示出了根据本发明实施例一种蓝牙连接方式，所述蓝牙连接方式是基于经典蓝牙连接。需要理解的是，本发明实施例所示的蓝牙连接方式并未示出蓝牙连接的所有步骤，在图3所示的每一个步骤中，还可以包括一个或多个步骤。
S301.启动查询
主设备蓝牙应用指示主设备主机开始查询，查询附近可以连接的蓝牙设备。例如，当用户想要使用手机搜索蓝牙耳机，可以在如图1E所示的界面拖动蓝牙开关图标，触发向蓝牙应用发送开始查询的命令。蓝牙应用根据该命令，向主机传达查询指令，主设备开始查询周围可被连接的蓝牙设备。
S302.查询
主设备主机根据主设备蓝牙应用的指示开始查询扫描。主设备主体以特定时间间隔发送查询消息，以便周围可连接的从设备能接收到主设备发送的查询消息。所述查询消息可以是查询存取码，其中查询存取码又可以分为一般查询存取码(General Inquiry Access Code,GIAC)和特定查询存取码(Dedicated Inquiry Access Code,DIAC)。一般查询存取码用 来查询所有可以连接的蓝牙设备，特定查询存取码用来查询某一特定类型的蓝牙设备。
需要说明的是，主设备主机在接收到从设备发送的查询响应信息后，不会停止发送查询信息。主设备主机只有在接收到主设备蓝牙应用发来的启动配对指令，才会停止发送查询信息。
S303.发送扩展查询响应
从设备在可连接状态下，以一定时间间隔改变监听频率。当从设备接收到GIAC或DIAC后，发送跳频序列FHS。跳频序列FHS可以包括设备地址和时钟信息，以便从设备与主设备交换数据。为了节省交互次数和时间，从设备会发送扩展查询响应消息((Extended Inquiry Result，EIR)，来传输一定的数据。例如，EIR信息可以包括从设备的名称、服务的UUID、制造商数据等信息。这样，主设备在接收到从设备发送的EIR信息后，不需要再次向从设备发送请求信息，请求从设备发送自身的名称等信息。需要说明的是，主设备周围所有可连接的从设备，只要接收到主设备发送的查询消息，在符合查询消息规定条件的情况下，都会向主设备发送EIR信息。因此主设备可能接收到不止一个从设备发送的EIR信息。
本发明实施例中，从设备在接收到GIAC或DIAC后，发送EIR信息，所述EIR信息可以包括从设备提供服务的UUID信息。例如，主设备是手机，从设备是蓝牙耳机，蓝牙耳机可以在EIR信息中加入蓝牙音频传输服务A2DP或者蓝牙免提服务HFP的UUID信息。手机的主机在接收到蓝牙耳机发送的EIR信息后，根据蓝牙协议栈解析收到的信息，得到蓝牙耳机的名称和蓝牙耳机所支持服务的UUID信息，然后在后续步骤中将所述蓝牙耳机所支持服务的UUID信息上报给手机的蓝牙应用。这样，手机可以通过蓝牙耳机发送的EIR信息了解到蓝牙耳机支持蓝牙音频传输服务和蓝牙免提服务，不用经过服务发现过程来了解蓝牙耳机所能提供的服务。
S304.保存查询结果
主设备主机获取从设备所提供服务的UUID信息后，存储在主设备存储器中，存储器可以是只读存储器(Read only Memory，ROM)或者是随机存储内存(Random Access Memory，RAM)。现有技术中，主设备在这一步骤不会解析或者存储从设备服务的UUID。但本发明实施中，主设备主体获取从设备的EIR信息后，解析EIR信息中包含的从设备服务信息，并存储在主设备存储器中。主设备主机可以在后续步骤向主设备蓝牙应用上报所述从设备服务信息。
S305.上报查询结果
主设备主机通过EIR信息得到从设备服务的UUID信息后，可以在这个步骤中上报给主设备应用。所述服务的UUID信息可以包括HFP和A2DP的UUID信息。
例如，主设备主机通过查询，得到10个从设备所提供服务的UUID信息，在上报查询结果时将所述10个从设备所提供服务的UUID信息上报给主设备蓝牙应用。
需要说明的是，主设备主机上报查询结果后不会停止发送查询信息，如果接收到从设备发送的EIR信息，会重复进行步骤S304和步骤S305。
S306.启动配对
主设备蓝牙应用指示主设备主机向其中一个从设备发起配对。例如，用户根据主设备显示屏幕上提供的可供连接的从设备中，选择其中一个配对。主设备蓝牙应用接收到用户 发出的指令，指示主设备主机向用户选择的从设备发起配对。
S307.配对
主设备主机收到主设备蓝牙应用发出的配对指令后，停止发送查询消息，可以与从设备建立异步连接定向逻辑链路ACL连接。配对方式参考图2所示的S202配对步骤。
S308.上报配对结果
主设备主机在配对成功后，向主设备蓝牙应用上报配对结果。
在一些实施例中，主设备主机如果在S305上报查询结果步骤中没有将从设备服务的UUID信息上报给主设备蓝牙应用，主设备主机也可以在S308步骤中将所述存储在主设备存储器中配对的从设备服务的UUID信息上报给主设备蓝牙应用。
在S308步骤上报从设备服务的UUID信息的好处在于，主设备主机只需上报与之配对的从设备的服务UUID。而如果主设备主机在步骤S305上报从设备服务的UUID，需要上报主设备发现的所有从设备的服务UUID信息。例如，主设备是手机，所述手机在开启蓝牙功能后，手机的蓝牙主机通过查询，接收到20个蓝牙设备各自发送的EIR信息，所述EIR信息包括发送该信息的蓝牙设备所支持的服务的UUID信息。由于蓝牙技术的限制，手机一般选择所述20个蓝牙设备中的1个蓝牙设备配对，然后建立服务连接。因此蓝牙应用只需要得到配对的蓝牙设备提供服务的UUID信息。因此，在S308步骤上报从设备服务的UUID，蓝牙主机只需向蓝牙应用上报一个蓝牙设备所提供的所有服务的UUID信息。
S309.建立服务连接
主设备蓝牙应用收到配对结果后，主设备基于前面接收到从设备服务的UUID信息，可以选择其中一种服务与从设备直接建立服务连接，向从设备传输数据，不用经过服务发现过程。在一些实施例中，从设备接收到主设备传输的数据，根据已知技术处理后，可以由扬声器播出，传递给用户。
如上文所述，低功耗蓝牙的功耗是经典蓝牙的1/10或更少，采用低功耗蓝牙技术可以极大延长蓝牙设备的持续使用时间。例如大部分采用经典蓝牙技术传输音频信息的蓝牙耳机，持续工作不到三个小时就需要充电。如果采用低功耗蓝牙技术传输音频，蓝牙耳机可以持续工作一天甚至更久。然而现有技术中，低功耗蓝牙技术在连接过程中也存在服务发现过程，不仅增加了蓝牙设备的功耗，也增加了连接的时间，严重影响用户体验。本申请实施例的技术方案可以有效降低低功耗蓝牙连接所需的功耗。
图4示出了本发明实施例一种基于低功耗蓝牙技术的连接方式。
参考图4，连接步骤如下：
S401：启动扫描
该步骤为可选步骤。如果主设备的蓝牙处于关闭状态，需要首先开启主设备的蓝牙功能。蓝牙功能开启后，主设备蓝牙应用指示主设备主机开始扫描。例如，主设备是手机，当用户想要使用手机搜索蓝牙耳机，可以在如图1E所示的界面拖动蓝牙开关图标，触发向蓝牙应用发送开始扫描的命令。蓝牙应用根据该命令，向主机传达扫描指令，主设备开始接收周围可被连接的蓝牙设备发送的低功耗蓝牙广播(Advertising Data，AD)。
S402：接收从设备发送的低功耗蓝牙广播
低功耗蓝牙BLE中规定了3个广播信道和37个数据信道这两种类型的信道。蓝牙设备 可以根据需求选择在不同的信道接收信息。主设备主机接收到主设备蓝牙应用开始扫描的指令后，开始在所述3个广播信道中的至少一个上接收从设备的低功耗蓝牙广播。为了进一步获得从设备的数据，主设备还可以发送主动扫描请求信息SCAN_REQ。
S403：从设备发送低功耗蓝牙广播
从设备如果处于可被连接的状态，可以使用3个广播信道中的至少一个发送低功耗蓝牙广播，此时如果主设备接收到了从设备发送的低功耗蓝牙广播，可以发现从设备。在一些实施例中，主设备还可以发送主动扫描请求信息，请求从设备发送附件信息，例如设备信息等。从设备在收到主设备的主动扫描请求信息后，会发送主动扫描响应信息。
例如，主设备是手机，从设备是蓝牙耳机，蓝牙耳机在开启低功率蓝牙功能后，在3个广播信道发送低功耗蓝牙广播，所述低功耗蓝牙广播包括蓝牙耳机的名称。这样手机的主机在接收到蓝牙耳机发送的低功耗蓝牙广播后，根据蓝牙协议栈解析收到的信息，得到蓝牙耳机的名称，然后将所述蓝牙耳机的名称上报给手机的蓝牙应用。
本实施例中从设备可以任意选取上述广播信道中的1个或者多个用来发送低功耗蓝牙广播。现有技术中，低功耗蓝牙广播不包含从设备提供服务的UUID。主设备需要通过专门的服务发现过程，来获取从设备所能支持的功能。但是本发明实施例中，从设备可以在发送的低功耗蓝牙广播数据字段中以下字段中的一个，携带服务的UUID：预留字段或其它字段中的空闲字段或可扩展字段，或厂商字段中预留的自定义字段等，例如HFP和A2DP的UUID。这样可以省去服务发现过程，降低连接功耗，减少连接时间。
在一些实施例中，从设备发送的低功耗蓝牙广播包含的服务UUID可以是设备制造商自定义的。如果主设备同样包含所述自定义的服务UUID，当主设备接收到从设备的低功耗蓝牙广播，可以停止扫描，根据预存的从设备的信息，直接与从设备建立服务连接，进行数据传输。这种方法的好处在于，可以节省主设备扫描时间和配对时间，进一步缩短蓝牙连接时间。
步骤S404、S405、S406、S407、S408和步骤S409参考图3所示步骤S304、S305、S306、S307、S308和步骤S409，在此不再赘述。
在一些实施例中，图4所示的主设备和从设备采用Just Work配对方式。
图4所示的本发明实施例中，从设备通过在低功耗蓝牙广播中加入所支持服务的UUID，可以使主设备接收到从设备位置、名称等信息的同时，获得建立GATT连接所需的数据。主设备在获得从设备服务的UUID后，存储在存储器里。主设备主机在上报扫描结果或上报配对结果步骤中上报给主设备蓝牙应用。
下面结合图5描述根据本发明实施例的低功耗蓝牙广播结构。低功耗蓝牙广播结构包括头部(Header)和有效载荷(payload)，其中有效载荷包括AdvA和AdvData，AdvA是从设备的广播地址。
AdvData包括31个字节，其中包括有效数据(significant)和无效数据(non-significant)两部分。有效数据部分包含若干个广播数据结构(AD Structure)。
每个AD Structure由长度(length)和数据(data)部分组成，其中长度表示数据的长度。数据部分有AD类型(AD Type)和AD数据(AD Data)组成，AD Type用于表示AD Data的类型。AD Type可以包括连接功能(Flags)、从设备名称(Local Name)、自定义数据等。
本发明实施例中，可以在AD structure增加从设备服务的UUID，也可以在广播数据任何字段增加从设备服务的UUID，本发明实施例对此不作限定。
本发明实施例中，从设备发送的广播数据可以是定向连接指示ADV_DIRECT_IND、通用广播指示ADV_IND、可扫描通用广播指示ADV_SCAN_IND、不可连接广播指示ADV_NONCONN_IND所述ADV数据包含广播数据AD(Advertising Data)结构。
本申请实施例提供一种蓝牙设备，示例性的，该蓝牙设备可以是智能移动终端。上述蓝牙设备可以包括蓝牙模块和存储器。图3至图5对应的实施例以及他们扩展实施例中的技术方案可以在本蓝牙设备中实现。具体地，上述蓝牙模块用于与其他蓝牙设备通讯，包括蓝牙主机和蓝牙应用。蓝牙模块还包括一个或者多个处理器，上述蓝牙主机和上述蓝牙应用可以在同一个处理器上运行，也可以在不同处理器上运行，本发明实施例对此不做限制。存储器包括指令，所述指令被上述处理器执行时，使得上述蓝牙设备执行以下操作：
搜寻可用的蓝牙设备；接收所述可用的蓝牙设备发送的广播信息，其中，所述可用的蓝牙设备包括第一蓝牙设备，所述第一蓝牙设备的广播信息包括所述第一蓝牙设备所支持的服务的UUID信息；存储并解析所述第一蓝牙设备的广播信息中包括的第一蓝牙设备所支持的服务的UUID信息；指令所述蓝牙主机与所述第一蓝牙设备配对；指令所述蓝牙主机向所述蓝牙应用上报配对信息，其中所述配对信息包括所述第一蓝牙设备所支持的服务的UUID信息；基于所述第一蓝牙设备所支持的服务的UUID信息，与所述第一蓝牙设备建立服务连接。
本申请实施例提供还提供另一种蓝牙设备，示例性的，该蓝牙设备可以是蓝牙耳机、蓝牙手表、蓝牙手环等。上述蓝牙设备包括蓝牙模块和存储器。图3至图5对应的实施例以及他们扩展实施例中的技术方案可以在本蓝牙设备中实现。具体地，蓝牙模块用于与其他蓝牙设备通讯，还包括一个或者多个处理器，存储器包括指令，所述指令被上述处理器执行时，使得上述蓝牙设备执行以下操作：
发送广播信息，所述广播信息包括所述蓝牙设备所支持的服务的UUID信息；接收第一蓝牙设备的配对请求；响应于所述第一蓝牙设备的配对请求，与所述第一蓝牙设备配对；接收所述第一蓝牙设备的服务连接请求，所述第一蓝牙设备的服务连接请求包括所述蓝牙设备所支持的服务的UUID信息的部分或全部；响应于所述第一蓝牙设备的服务连接请求，与所述第一蓝牙设备建立服务连接。
本申请实施例还提供了一种系统，包括第一蓝牙设备和第二蓝牙设备，其中第二蓝牙设备包括第二蓝牙应用和第二蓝牙主机。其中上述第一蓝牙设备被配置为，发送广播信息，上述广播信息包括上述第一蓝牙设备所支持的服务的UUID信息；在一些实施例中，上述广播信息是低功耗蓝牙广播。在另一些实施例中，上述广播信息是扩展查询响应信息。上述第二蓝牙主机被配置为执行以下操作：搜寻可用的蓝牙设备，并接收上述可用的蓝牙设备发送的广播信息，其中，上述可用的蓝牙设备包括第一蓝牙设备，上述第一蓝牙设备的广播信息包括上述第一蓝牙设备所支持的服务的UUID信息，存储并解析上述第一蓝牙设备的广播信息中包括的第一蓝牙设备所支持的服务的UUID信息，向上述第一蓝牙设备发送配对请求；需要说明的是，上述搜寻可用的蓝牙设备根据不同情况有不同的方式。例如，在经典蓝牙连接方式下，第二蓝牙主机搜寻可用的蓝牙设备时会主动发送查询信息，周围 可用的蓝牙设备收到第二蓝牙主机发送的查询信息后，会向第二蓝牙主机发送查询响应信息或者扩展查询响应信息。在低功耗蓝牙连接方式下，第二蓝牙主机会在低功耗蓝牙广播信道搜索周围可用蓝牙设备发送的低功耗蓝牙广播。
上述第一蓝牙设备还被配置为执行以下操作：接收上述第二蓝牙设备的配对请求；响应于上述第二蓝牙设备的配对请求，与上述第二蓝牙设备执行配对；需要说明的是第一蓝牙设备和第二蓝牙设备的配对过程可能存在多次交互。
上述第二蓝牙设备还被配置为执行以下操作：指令上述第二蓝牙主机向上述第二蓝牙应用上报配对信息，上述配对信息包括上述第一蓝牙设备所支持的服务的UUID信息；基于上述第一蓝牙设备所支持的服务的UUID信息，向上述第一蓝牙设备发送服务连接请求；上述第一蓝牙设备还被配置为执行以下操作：接收上述第二蓝牙设备的服务连接请求；响应于接收到上述第二蓝牙设备的服务连接请求，与上述第二蓝牙设备建立服务连接。
本申请实施例提供了一种蓝牙芯片，图3至图5对应的实施例以及他们扩展实施例中的技术方案可以在本蓝牙设备中实现。具体来说，上述蓝牙芯片包括：存储器，用于存储程序；处理器，用于执行所述存储器存储的程序，所述程序可以实现蓝牙主机和蓝牙应用的功能，使得所述蓝牙芯片执行以下操作：搜寻可用的蓝牙设备；接收所述可用的蓝牙设备发送的广播信息，其中，所述可用的蓝牙设备包括第一蓝牙设备，所述第一蓝牙设备的广播信息包括所述第一蓝牙设备所支持的服务的UUID信息；存储并解析所述第一蓝牙设备的广播信息中包括的第一蓝牙设备所支持的服务的UUID信息；指令所述蓝牙主机与所述第一蓝牙设备执行配对操作；指令所述蓝牙主机向所述电子设备的蓝牙应用上报配对信息，其中所述配对信息包括所述第一蓝牙设备所支持的服务的UUID信息；基于所述第一蓝牙设备所支持的服务的UUID信息，与所述第一蓝牙设备建立服务连接。
本申请实施例还提供了另一种蓝牙芯片，图3至图5对应的实施例以及他们扩展实施例中的技术方案可以在本蓝牙设备中实现。具体来说，上述蓝牙芯片包括：存储器，用于存储程序；处理器，用于执行所述存储器存储的程序，使得所述蓝牙芯片执行以下操作：发送广播信息，所述广播信息包括所述电子设备所支持的服务的UUID信息；接收第一蓝牙设备的配对请求；响应于所述第一蓝牙设备的配对请求，与所述第一蓝牙设备配对；接收所述第一蓝牙设备的服务连接请求，所述第一蓝牙设备的服务连接请求包括所述蓝牙设备所支持的服务的UUID信息的部分或全部；响应于所述第一蓝牙设备的服务连接请求，与所述第一蓝牙设备建立服务连接。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和涉及约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本发明的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其他的方式实现。例如，以上所描述的装置实施例仅仅是示例性的，例如，所述单元的 划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是典型，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本发明各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本发明各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以所述权利要求的保护范围为准。

Claims (28)

  1. 一种蓝牙设备，其特征在于，包括：
    蓝牙模块，用于与其他蓝牙设备通讯，其中，所述蓝牙模块包括蓝牙主机和蓝牙应用；
    所述蓝牙模块还包括一个或多个处理器；
    存储器，所述存储器包括指令，所述指令被所述一个或多个处理器执行时，使得所述蓝牙设备执行以下操作：
    搜寻可用的蓝牙设备；
    接收所述可用的蓝牙设备发送的广播信息，其中，所述可用的蓝牙设备包括第一蓝牙设备，所述第一蓝牙设备的广播信息包括所述第一蓝牙设备所支持的服务的UUID信息；
    存储并解析所述第一蓝牙设备的广播信息中包括的所述第一蓝牙设备所支持的服务的UUID信息；
    指令所述蓝牙主机与所述第一蓝牙设备配对；
    指令所述蓝牙主机向所述蓝牙应用上报配对信息，其中所述配对信息包括所述第一蓝牙设备所支持的服务的UUID信息；
    基于所述第一蓝牙设备所支持的服务的UUID信息，与所述第一蓝牙设备建立服务连接。
  2. 根据权利要求1所述的蓝牙设备，其特征在于，所述广播信息是低功耗蓝牙广播。
  3. 根据权利要求1所述的蓝牙设备，其特征在于，所述广播信息是扩展查询响应信息。
  4. 根据权利要求1至3所述的蓝牙设备，其特征在于，所述第一蓝牙设备所支持的服务的UUID信息包括语音的免提配置文件(HFP)和高级音频分发配置文件(A2DP)的UUID信息。
  5. 一种蓝牙设备，其特征在于，包括：
    蓝牙模块，用于与其他蓝牙设备通讯；
    所述蓝牙模块还包括一个或多个处理器；
    存储器，包括指令，所述指令被所述一个或多个处理器执行时，使得所述蓝牙设备执行以下操作：
    发送广播信息，所述广播信息包括所述蓝牙设备所支持的服务的UUID信息；
    接收第一蓝牙设备的配对请求；
    响应于所述第一蓝牙设备的配对请求，与所述第一蓝牙设备配对；
    接收所述第一蓝牙设备的服务连接请求，所述第一蓝牙设备的服务连接请求包括所述蓝牙设备所支持的服务的UUID信息的部分或全部；
    响应于所述第一蓝牙设备的服务连接请求，与所述第一蓝牙设备建立服务连接。
  6. 根据权利要求5所述的蓝牙设备，其特征在于，所述广播信息是低功耗蓝牙广播。
  7. 根据权利要求5所述的蓝牙设备，其特征在于，所述广播信息是扩展查询响应信息。
  8. 根据权利要求5至7所述的蓝牙设备，其特征在于，所述电子设备所支持的服务的UUID信息包括语音的免提配置文件(HFP)和高级音频分发配置文件(A2DP)的UUID 信息。
  9. 一种应用于蓝牙设备的蓝牙通信方法，所述蓝牙设备包括蓝牙主机和蓝牙应用，其特征在于：
    搜寻可用的蓝牙设备；
    接收所述可用的蓝牙设备发送的广播信息，其中，所述可用的蓝牙设备包括第一蓝牙设备，所述第一蓝牙设备的广播信息包括所述第一蓝牙设备所支持的服务的UUID信息；
    存储并解析所述第一蓝牙设备的广播信息中包括的第一蓝牙设备所支持的服务的UUID信息；
    指令所述蓝牙主机与所述第一蓝牙设备配对；
    指令所述蓝牙主机向所述蓝牙应用上报配对信息，其中所述配对信息包括第一蓝牙设备所支持的服务的UUID信息；
    基于所述第一蓝牙设备所支持的服务的UUID信息，与所述第一蓝牙设备建立服务连接。
  10. 根据权利要求9所述的方法，其特征在于，所述广播信息是低功耗蓝牙广播。
  11. 根据权利要求9所述的方法，其特征在于，所述广播信息是扩展查询响应信息。
  12. 根据权利要求9至11所述的方法，其特征在于，所述第一蓝牙设备所支持的服务的UUID信息包括语音的免提配置文件(HFP)和高级音频分发配置文件(A2DP)的UUID信息。
  13. 一种应用于蓝牙设备的蓝牙通信方法，其特征在于：
    发送广播信息，所述广播信息包括所述电子设备所支持的服务的UUID信息；
    接收第一蓝牙设备的配对请求；
    响应于所述第一蓝牙设备的配对请求，与所述第一蓝牙设备配对；
    接收所述第一蓝牙设备的服务连接请求，所述第一蓝牙设备的服务连接请求包括所述蓝牙设备所述支持的服务的UUID信息的部分或全部；
    响应于所述第一蓝牙设备的服务连接请求，与所述第一蓝牙设备建立服务连接。
  14. 根据权利要求13所述的方法，其特征在于，所述广播信息是低功耗蓝牙广播。
  15. 根据权利要求13所述的方法，其特征在于，所述广播信息是扩展查询响应信息。
  16. 根据权利要求13至15所述的方法，其特征在于，所述电子设备所支持的服务的UUID信息包括语音的免提配置文件(HFP)和高级音频分发配置文件(A2DP)的UUID信息。
  17. 一种系统，包括：
    第一蓝牙设备；
    以及第二蓝牙设备，所述第二蓝牙设备包括第二蓝牙应用和第二蓝牙主机；
    其中所述第一蓝牙设备被配置为，发送广播信息，所述广播信息包括所述第一蓝牙设备所支持的服务的UUID信息；
    所述第二蓝牙主机被配置为执行以下操作：
    搜寻可用的蓝牙设备，并接收所述可用的蓝牙设备发送的广播信息，其中，所述可用的蓝牙设备包括第一蓝牙设备，所述第一蓝牙设备的广播信息包括所述第一蓝牙设备所支 持的服务的UUID信息，
    存储并解析所述第一蓝牙设备的广播信息中包括的第一蓝牙设备所支持的服务的UUID信息，
    向所述第一蓝牙设备发送配对请求；
    所述第一蓝牙设备还被配置为执行以下操作：
    接收所述第二蓝牙设备的配对请求；
    响应于所述第二蓝牙设备的配对请求，与所述第二蓝牙设备执行配对；
    所述第二蓝牙设备还被配置为执行以下操作：
    指令所述第二蓝牙主机向所述第二蓝牙应用上报配对信息，所述配对信息包括所述第一蓝牙设备所支持的服务的UUID信息；
    基于所述第一蓝牙设备所支持的服务的UUID信息，向所述第一蓝牙设备发送服务连接请求；
    所述第一蓝牙设备还被配置为执行以下操作：
    接收所述第二蓝牙设备的服务连接请求；
    响应于接收到所述第二蓝牙设备的服务连接请求，与所述第二蓝牙设备建立服务连接。
  18. 根据权利要求17所述的系统，其特征在于，所述广播信息是低功耗蓝牙广播。
  19. 根据权利要求17所述的系统，其特征在于，所述广播信息是扩展查询响应信息。
  20. 根据权利要求17至19所述的系统，其特征在于，所述第一蓝牙设备所支持的服务的UUID信息包括语音的免提配置文件(HFP)和高级音频分发配置文件(A2DP)的UUID信息。
  21. 一种蓝牙芯片，其特征在于，包括：
    存储器，用于存储程序；
    处理器，用于执行所述存储器存储的程序，所述程序可以实现蓝牙主机和蓝牙应用的功能，使得所述蓝牙芯片执行以下操作：
    搜寻可用的蓝牙设备；
    接收所述可用的蓝牙设备发送的广播信息，其中，所述可用的蓝牙设备包括第一蓝牙设备，所述第一蓝牙设备的广播信息包括所述第一蓝牙设备所支持的服务的UUID信息；
    存储并解析所述第一蓝牙设备的广播信息中包括的第一蓝牙设备所支持的服务的UUID信息；
    指令所述蓝牙主机与所述第一蓝牙设备执行配对操作；
    指令所述蓝牙主机向所述电子设备的蓝牙应用上报配对信息，其中所述配对信息包括所述第一蓝牙设备所支持的服务的UUID信息；
    基于所述第一蓝牙设备所支持的服务的UUID信息，与所述第一蓝牙设备建立服务连接。
  22. 根据权利要求21所述的蓝牙芯片，其特征在于，所述广播信息是低功耗蓝牙广播。
  23. 根据权利要求21所述的蓝牙芯片，其特征在于，所述广播信息是扩展查询响应信息。
  24. 根据权利要求21至23所述的蓝牙芯片，其特征在于，所述第一蓝牙设备所支持 的服务的UUID信息包括语音的免提配置文件(HFP)和高级音频分发配置文件(A2DP)的UUID信息。
  25. 一种蓝牙芯片，其特征在于，包括：
    存储器，用于存储程序；
    处理器，用于执行所述存储器存储的程序，使得所述蓝牙芯片执行以下操作：
    发送广播信息，所述广播信息包括所述电子设备所支持的服务的UUID信息；
    接收第一蓝牙设备的配对请求；
    响应于所述第一蓝牙设备的配对请求，与所述第一蓝牙设备配对；
    接收所述第一蓝牙设备的服务连接请求，所述第一蓝牙设备的服务连接请求包括所述蓝牙设备所支持的服务的UUID信息的部分或全部；
    响应于所述第一蓝牙设备的服务连接请求，与所述第一蓝牙设备建立服务连接。
  26. 根据权利要求25所述的蓝牙芯片，其特征在于，所述广播信息是低功耗蓝牙广播。
  27. 根据权利要求25所述的蓝牙芯片，其特征在于，所述广播信息是扩展查询响应信息。
  28. 根据权利要求25至27所述的蓝牙芯片，其特征在于，所述电子设备所支持的服务的UUID信息包括语音的免提配置文件(HFP)和高级音频分发配置文件(A2DP)的UUID信息。
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