WO2020077659A1 - 模式可切换的蓝牙设备、蓝牙连接系统和蓝牙连接方法 - Google Patents

模式可切换的蓝牙设备、蓝牙连接系统和蓝牙连接方法 Download PDF

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WO2020077659A1
WO2020077659A1 PCT/CN2018/111624 CN2018111624W WO2020077659A1 WO 2020077659 A1 WO2020077659 A1 WO 2020077659A1 CN 2018111624 W CN2018111624 W CN 2018111624W WO 2020077659 A1 WO2020077659 A1 WO 2020077659A1
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Prior art keywords
bluetooth
connection
mode
bluetooth device
switchable
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PCT/CN2018/111624
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English (en)
French (fr)
Inventor
李雨轩
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北京轩辕联科技有限公司
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Priority to US17/286,493 priority Critical patent/US20210345082A1/en
Priority to KR1020217014513A priority patent/KR20210076093A/ko
Priority to JP2021521501A priority patent/JP2022505461A/ja
Priority to EP18937045.5A priority patent/EP3911008A4/en
Publication of WO2020077659A1 publication Critical patent/WO2020077659A1/zh

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    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0027—Control or signalling for completing the hand-off for data sessions of end-to-end connection for a plurality of data sessions of end-to-end connections, e.g. multi-call or multi-bearer end-to-end data connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/318—Received signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00837—Determination of triggering parameters for hand-off
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/03—Reselecting a link using a direct mode connection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/302—Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength
    • 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
    • H04W76/14—Direct-mode setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/18—Management of setup rejection or failure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices

Definitions

  • the present application relates to the field of Bluetooth devices and Bluetooth connection, in particular to a Bluetooth device with switchable mode, a Bluetooth connection system including the Bluetooth device with switchable mode, and a Bluetooth connection method.
  • an in-vehicle central control system with comprehensive processing capabilities is usually provided.
  • the in-vehicle central control system usually provides in-vehicle Bluetooth.
  • Module to establish Bluetooth connection with various Bluetooth devices The implementation mechanism of the Bluetooth module in the car is the same as the Bluetooth module of the mobile phone, and has the same transmission system.
  • in-vehicle Bluetooth is an in-vehicle wireless communication system designed and developed based on wireless Bluetooth technology, mainly to connect the in-vehicle Bluetooth module with a mobile phone through a Bluetooth connection, so as to realize calls, audio playback, Various applications such as voice navigation.
  • Bluetooth devices such as in-vehicle Bluetooth devices, Bluetooth headsets, and Bluetooth-enabled devices Establish a Bluetooth link between any user terminals.
  • the Bluetooth component in the in-vehicle Bluetooth device and the user terminal (such as a mobile phone) is set to the master mode, and the Bluetooth component in the Bluetooth headset is set to the slave mode.
  • the Bluetooth headset is used as such a multi-device Intermediate node in the Bluetooth connection system.
  • the Bluetooth device used as an intermediate node has a connection abnormality or is not within the range of the Bluetooth connection, and the remaining Bluetooth devices have the same connection mode, such as the same master mode or the same slave mode, they cannot directly When a Bluetooth link is established, the entire multi-device Bluetooth connection system becomes unusable.
  • this application provides a Bluetooth device with switchable modes, which includes:
  • a processing device in which the mobile device operating system is mounted;
  • a Bluetooth component configured to switch the connection mode under the control of the processing device.
  • the Bluetooth device according to the embodiment of the present application, wherein the Bluetooth component is configured to be initially set to the master mode under the control of the processing device, for establishing a connection with the target Bluetooth device set to the slave mode.
  • the Bluetooth device configured to monitor the connection query time of the Bluetooth component, and control the Bluetooth component to be set to when the connection query time exceeds a preset connection time threshold Slave mode.
  • the Bluetooth device configured to obtain a received signal strength value (RSSI) of the target Bluetooth device, and when the received signal strength value is lower than a preset signal strength threshold Control the Bluetooth component to be set to the slave mode.
  • RSSI received signal strength value
  • the Bluetooth device according to the embodiment of the present application, wherein the mobile device operating system includes one of an Android operating system and a WINCE operating system.
  • a Bluetooth connection system which includes:
  • a target Bluetooth device the target Bluetooth device is set to a slave mode
  • An external Bluetooth device wherein the external Bluetooth device is set to the main mode
  • the Bluetooth device with the switchable mode is configured to establish a connection with the external Bluetooth device by switching the connection mode when the connection with the target Bluetooth device cannot be established.
  • a Bluetooth connection system wherein the Bluetooth device with the mode switchable is configured to be initially set as a master mode, and the setting is changed to a slave mode if a connection cannot be established with the target Bluetooth device .
  • the Bluetooth connection system according to an embodiment of the present application, wherein the processing device is configured to monitor the connection query time of the Bluetooth component, and control the Bluetooth component setting when the connection query time exceeds a preset connection time threshold For slave mode.
  • the Bluetooth connection system wherein the processing device is configured to obtain a received signal strength value (RSSI) of the target Bluetooth device, and when the received signal strength value is lower than a preset signal strength threshold Control the Bluetooth component to be set to the slave mode.
  • RSSI received signal strength value
  • a Bluetooth connection method for the foregoing Bluetooth connection system which includes:
  • the initialization step includes:
  • the Bluetooth component in the Bluetooth device with switchable mode is set as the main mode.
  • a Bluetooth connection system wherein in the case where the Bluetooth device that can switch modes cannot establish a connection with the target Bluetooth device, the connection mode of the Bluetooth device that can be switched by switching the mode
  • the steps to establish a connection with the external Bluetooth device include:
  • the Bluetooth device with the switchable mode establishes a connection with the external Bluetooth device.
  • a Bluetooth connection system wherein the Bluetooth device switchable by switching the mode when the Bluetooth device switchable in the mode cannot establish a connection with the target Bluetooth device
  • the steps of establishing a connection with the external Bluetooth device in connection mode include:
  • the Bluetooth device with the switchable mode establishes a connection with the external Bluetooth device.
  • the operational reliability of the multi-device Bluetooth connection system can be significantly improved, eliminating the possibility of abnormality caused by a single Bluetooth device or not being within the connection range. Hidden danger of the failure of the entire multi-device Bluetooth connection system.
  • the switchable Bluetooth devices provided in the embodiments of the present application, it can provide a customized Bluetooth connection solution that suits different scenarios and different user needs, making the Bluetooth connection method in the corresponding scenario more flexible and variable, thus Provide a good user experience that cannot be given by the prior art.
  • FIG. 1 is a schematic block diagram of a mode switchable Bluetooth device 10 according to an embodiment of the present application
  • FIG. 2 is a schematic block diagram of a Bluetooth connection system 100 including multiple Bluetooth devices according to an embodiment of the present application.
  • FIG. 3 is a flowchart of a Bluetooth connection method for the Bluetooth connection system 100 according to an embodiment of the present application.
  • installation should be understood in a broad sense.
  • it can be a fixed connection, a detachable connection, or a one-piece construction; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it is one of two devices, elements, or components Inter-connectivity.
  • Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.
  • the Bluetooth device 10 with switchable modes includes:
  • a processing device 11 in which the mobile device operating system is mounted is mounted
  • the Bluetooth component 12 is configured to switch the connection mode under the control of the processing device.
  • the Bluetooth device 10 whose mode can be switched is a vehicle-mounted Bluetooth device, and the vehicle-mounted Bluetooth device includes a processing device 11 and a Bluetooth component 12.
  • the in-vehicle Bluetooth device further includes an in-vehicle speaker, an in-vehicle microphone, and other functional modules.
  • the above-mentioned processing device 11 will run the mobile device operating system when it is started.
  • the Android system is used as the operating system of the processing device 11.
  • Bluetooth It is a wireless technology standard that enables short-range data exchange between fixed devices, mobile devices, and building personal area networks (UHF radio waves in the 2.4-2.485GHz ISM band).
  • the Android platform provides support for Bluetooth communication stacks, allowing devices to wirelessly transmit data with other devices.
  • the application layer calls Bluetooth related functions through Android APIs. These APIs enable the program to connect wirelessly to Bluetooth devices and have the characteristics of point-to-point connection or multi-terminal wireless connection.
  • an in-vehicle Bluetooth device is an example of the above-mentioned mode switchable Bluetooth device, where the in-vehicle Bluetooth device runs the Android operating system when it is started.
  • the technical solution of the present application uses a combination of instructions in a standard Android system to implement the master-slave mode switching of the Bluetooth component; in other embodiments, the technical solution of the present application uses an adapted API to implement The function of the master-slave mode switching of the Bluetooth component, wherein when the abnormal connection condition of the target Bluetooth device is detected, the Bluetooth component is controlled to switch the master-slave mode by calling the above API.
  • the above-mentioned target Bluetooth device uses a Bluetooth headset as an example.
  • the Bluetooth headset can establish a Bluetooth connection with any user terminal (for example, a smart phone) having a Bluetooth function, and at the same time, the Bluetooth headset can also establish a connection with the Bluetooth device with the switchable mode.
  • the Bluetooth headset is set to a slave mode, so that a Bluetooth link can be established with an on-vehicle Bluetooth device (that is, the above mode switchable Bluetooth device) and an external Bluetooth device (smartphone), respectively, which are set to the master mode.
  • This multi-Bluetooth device connection system can provide the required data transmission channel and corresponding node control between more than two Bluetooth devices, which can be applied to more complex application scenarios and provide solutions that are more in line with user needs. .
  • a Bluetooth connection system 100 including multiple Bluetooth devices including:
  • the Bluetooth device 10 can be switched in a mode that uses a car Bluetooth device as an example
  • the Bluetooth device 10 in which the mode can be switched is configured to establish a connection with the external Bluetooth device 30 by switching the connection mode when the connection cannot be established with the target Bluetooth device 20.
  • the Bluetooth headset When the Bluetooth headset malfunctions, lacks power, is outside the connection distance of the car's Bluetooth device, etc., if the car's Bluetooth device and smartphone maintain their original mode settings (both are the main mode at this time), the two cannot Directly establish a Bluetooth link to provide a common point-to-point data transmission application. In this case, the above-mentioned multi-Bluetooth device connection system cannot be smoothly converted into a point-to-point Bluetooth connection system.
  • the in-vehicle Bluetooth device is initially set to the main mode when it is started, and then in the case where the connection cannot be established with the target Bluetooth device (ie, the Bluetooth headset in this example) , To establish a connection with an external Bluetooth device (smartphone) by switching its own connection mode.
  • the target Bluetooth device ie, the Bluetooth headset in this example
  • the car Bluetooth device is started, and it is set to the main mode by default; in this mode, the car Bluetooth device actively searches for the car Bluetooth headset and initiates a link. If the link is successful, the car Bluetooth device maintains the existing link;
  • the car Bluetooth device exits the master mode, enters the slave mode, and prompts the system to enter the car Bluetooth slave mode on the car display interface;
  • the above abnormal states include:
  • the car's Bluetooth device When the Bluetooth headset is abnormal, and the link between the car's Bluetooth device and the Bluetooth ear is disconnected, the car's Bluetooth device will automatically return to the Bluetooth headset. After a period of time (such as three minutes), the search and link fails, then the car's Bluetooth device will exit the main mode , Enter the slave mode, and prompt the system to enter the car Bluetooth slave mode on the car display interface;
  • the car Bluetooth device detects the signal quality of the Bluetooth headset, and initiates the connection when the signal quality reaches a certain value. If the quality is poor or there is no signal, the car Bluetooth The module is always in slave mode.
  • the RSSI value (received signal strength) of the Bluetooth headset is generally detected as an indicator of the signal quality of the Bluetooth headset.
  • a smartphone as an example of an external Bluetooth device can provide support for the A2DP audio transmission protocol, so that it can establish a link with a Bluetooth headset or with a car Bluetooth device and transmit high-quality audio data.
  • A2DP Advanced Audio Distribution Profile
  • This protocol is suitable for the transmission of high-quality audio data. Specifically, it uses the ACL asynchronous connectionless link established at the L2CAP layer to transmit high-quality mono channels. Or stereo audio data. Based on the A2DP protocol to establish a connection between a smartphone and other Bluetooth devices, the chip in the headset can be used to stack data to achieve high-definition presentation of the transmitted audio data.
  • the connection between two Bluetooth devices is as follows. First, the main unit uses GIAC and DIAC to query Bluetooth devices within a certain range (to query sub-status). If the nearby Bluetooth device is listening to these queries (inquiry scan sub-state), it will respond to the main unit by sending its own address and clock information (FHS data packet) to the main unit (inquiry response sub-state). After sending this information, the slave unit starts listening for paging messages (page scan) from the master unit. After discovering Bluetooth devices in range, the main unit can page these devices (paging sub-state) to establish a connection.
  • FHS data packet address and clock information
  • the slave unit After sending this information, the slave unit starts listening for paging messages (page scan) from the master unit. After discovering Bluetooth devices in range, the main unit can page these devices (paging sub-state) to establish a connection.
  • the slave unit can immediately respond with its own device access code (DAC) (the slave unit responds to the sub-state).
  • DAC device access code
  • the master unit After the master unit receives the response from the slave unit, it can transmit the real-time clock, BD_ADDR, BCH parity bit and device type (FHS data packet) of the master unit as the response. After the slave unit receives the FHS data packet, the master unit and the slave unit enter the connected state.
  • the process of establishing a connection of a Bluetooth device mainly involves the following states:
  • This sub-state is used by the master unit to activate and connect the slave unit.
  • the master unit sends out the paging message by transmitting the device access code (DAC) of the slave unit in different frequency hopping channels.
  • DAC device access code
  • Page scan In this sub-state, the slave unit listens to its own device access code (DAC) within a window scan lifetime. Within this scan window, the slave unit listens with a single frequency hopping (derived from its paging frequency hopping sequence).
  • DAC device access code
  • Slave unit response The slave unit responds to the paging message of its master unit in this sub-state. If the slave unit in the paging scan sub-state is related to the master unit paging message, it enters this state. The slave unit enters the connected state after receiving the FHS data packet from the master unit.
  • Master unit response The master unit enters this sub-state after receiving a response from the slave unit to its paging message. If the slave unit replies to the master unit, the master unit sends FHS data packets to the slave unit, and then the master unit enters the connected state.
  • Inquiry is used to discover the identity of neighboring Bluetooth devices.
  • the discovery unit collects the Bluetooth device address and the clocks of all units that respond to the query message.
  • Inquiry Scan Inquiry Scan: In this state, the Bluetooth device listens to inquiries from other devices. At this time, the scanning device can listen to the general inquiry access code (GIAC) or the special inquiry access code (DIAC).
  • GIAC general inquiry access code
  • DIAC special inquiry access code
  • Inquiry response For the query, only the slave unit can respond and the master unit cannot.
  • the slave unit responds with an FHS data packet, which contains the device access code, internal clock, and some other slave unit information of the slave unit.
  • a typical paging process proceeds as follows:
  • One device (source) pages another device (destination) and is in the paging state (Page state).
  • the destination device receives the page and is in the page scan state (Page Scan State).
  • the destination device sends a reply to the source device, which is in the slave device response state (Slave Response state).
  • the source device sends the FHS packet to the destination device, which is in the master device response state (Master Response state).
  • the destination device sends a second reply to the source device, which is now in the Slave Response state.
  • the destination and the source device switch and adopt the parameters of the source channel. At this time, they are in the response state of the master device and the response state of the child device.
  • Microsoft's WINCE system is used as the operating system of the processing device 11.
  • the Bluetooth connection method includes:
  • the initialization step includes:
  • the Bluetooth component in the Bluetooth device with switchable mode is set as the main mode.
  • the connection mode of the Bluetooth device with switchable by switching the mode include:
  • the Bluetooth device with the switchable mode establishes a connection with the external Bluetooth device.
  • the Bluetooth device switchable in the mode in the case where the Bluetooth device switchable in the mode cannot establish a connection with the target Bluetooth device, the Bluetooth device switchable by switching the mode
  • the steps of establishing a connection with the external Bluetooth device in connection mode include:
  • the Bluetooth device with the switchable mode establishes a connection with the external Bluetooth device.
  • the embodiment of the present application can significantly improve the operational reliability of the multi-device Bluetooth connection system by providing a Bluetooth device with switchable modes, when the Bluetooth headset fails, the power is insufficient, and it is outside the connection distance of the car Bluetooth device. It can make the above-mentioned multi-Bluetooth device connection system smoothly switch to a point-to-point Bluetooth connection system, thereby eliminating the hidden danger of the entire multi-device Bluetooth connection system failing due to the abnormality of a single Bluetooth device or not within the connection range.
  • the Bluetooth connection mode in the corresponding scene is more flexible and variable, thereby being able to provide a customized Bluetooth connection solution that suits different scenarios and different user needs.
  • the operational reliability of the multi-device Bluetooth connection system can be significantly improved, eliminating the possibility that the entire Bluetooth device is abnormal or not in the connection range. Hidden danger of multi-device Bluetooth connection system failure.
  • the switchable Bluetooth devices provided in the embodiments of the present application, it can provide a customized Bluetooth connection solution that suits different scenarios and different user needs, making the Bluetooth connection method in the corresponding scenario more flexible and variable, thus Provide a good user experience that cannot be given by the prior art.

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Abstract

本申请涉及一种模式可切换的蓝牙设备、包括该模式可切换的蓝牙设备的蓝牙连接系统以及蓝牙连接方法，其中该模式可切换蓝牙设备包括：处理装置，所述处理装置中装载有移动设备操作系统；和蓝牙组件，其构造为在所述处理装置的控制下切换连接模式，该模式可切换的蓝牙设备构造为在无法与目标蓝牙设备建立连接的情况下，通过切换连接模式来与外部蓝牙设备建立连接。通过本申请的模式可切换蓝牙设备，能够显著提高多设备蓝牙连接系统的运行可靠性，在异常状况时能够使得上述多蓝牙设备连接系统顺利切换成点对点蓝牙连接系统。

Description

模式可切换的蓝牙设备、蓝牙连接系统和蓝牙连接方法 技术领域
本申请涉及蓝牙设备和蓝牙连接领域，具体地涉及一种模式可切换的蓝牙设备、包括该模式可切换的蓝牙设备的蓝牙连接系统以及蓝牙连接方法。
背景技术
目前在车辆中，通常会提供具有综合处理能力的车载中控系统，另外由于蓝牙设备在智能终端、便携式装置、可穿戴装置等各种设备中的广泛应用，车载中控系统通常会提供车载蓝牙模块，以便与各种蓝牙设备建立蓝牙连接。车载蓝牙模块与手机的蓝牙模组的实现机制相同，拥有相同的发射系统。一般来说，车载蓝牙是以无线蓝牙技术为基础而设计研发的车内无线通信系统，主要是为了通过蓝牙连接将车载蓝牙模块与手机连接，以便在车辆驾驶的环境中实现通话、音频播放、语音导航等各种应用。
在一些应用场景中，基于用户的操作安全性、便捷性、隐私保护等方面的考虑，需要使用两个以上的蓝牙设备彼此之间建立连接，例如在车载蓝牙设备、蓝牙耳机以及具有蓝牙功能的任意用户终端之间建立蓝牙链接。在一些实施例中，车载蓝牙设备和用户终端(如手机)中的蓝牙组件被设置为主模式，蓝牙耳机中的蓝牙组件则被设置为从模式，显然该蓝牙耳机被用作这种多设备蓝牙连接体系中的中间节点。
在这些场景中，如果用作中间节点的蓝牙设备出现连接异常或者不在蓝牙连接范围内等状况，而余下的蓝牙设备由于自身连接模式相同，例如同为主模式或同为从模式，因而无法直接建立蓝牙链路，则整个多设备蓝牙连接体系会变得无法使用。
现有技术中并没有相应方法来解决上述问题。
公开于本申请背景技术部分的信息仅仅旨在加深对本申请的一般背景技 术的理解，而不应当被视为承认或以任何形式暗示该信息构成已为本领域技术人员所公知的现有技术。
发明内容
为了解决上述问题，本申请提供一种模式可切换的蓝牙设备，其包括：
处理装置，所述处理装置中装载有(mounted)移动设备操作系统；和
蓝牙组件(component)，其构造为在所述处理装置的控制下切换连接模式。
可选的，根据本申请实施例的蓝牙设备，其中蓝牙组件构造为在所述处理装置的控制下初始设置为主模式，用于与设置为从模式的目标蓝牙设备建立连接。
可选的，根据本申请实施例的蓝牙设备，其中处理装置构造为监控所述蓝牙组件的连接查询时间，并且在所述连接查询时间超过预设的连接时间阈值时控制所述蓝牙组件设置为从模式。
可选的，根据本申请实施例的蓝牙设备，其中处理装置构造为获得所述目标蓝牙设备的接收信号强度值(RSSI)，并且在所述接收信号强度值低于预设的信号强度阈值时控制所述蓝牙组件设置为从模式。
可选的，根据本申请实施例的蓝牙设备，其中所述移动设备操作系统包括安卓操作系统和WINCE操作系统之一。
根据本申请的另一方面，还提供了一种蓝牙连接系统，其包括：
如上述第一方面所述的模式可切换的蓝牙设备；
目标蓝牙设备，所述目标蓝牙设备设置为从模式；以及
外部蓝牙设备，其中所述外部蓝牙设备设置为主模式，
其中所述模式可切换的蓝牙设备构造为在无法与所述目标蓝牙设备建立连接的情况下，通过切换连接模式来与所述外部蓝牙设备建立连接。
可选的，根据本申请实施例的蓝牙连接系统，其中所述模式可切换的蓝牙设备构造成初始设置为主模式，并且在无法与所述目标蓝牙设备建立连接的情况下变更设置为从模式。
可选的，根据本申请实施例的蓝牙连接系统，其中处理装置构造为监控所述蓝牙组件的连接查询时间，并且在所述连接查询时间超过预设的连接时间阈值时控制所述蓝牙组件设置为从模式。
可选的，根据本申请实施例的蓝牙连接系统，其中处理装置构造为获得所述目标蓝牙设备的接收信号强度值(RSSI)，并且在所述接收信号强度值低于预设的信号强度阈值时控制所述蓝牙组件设置为从模式。
根据本申请实施例的又一方面，还提供了一种用于上述蓝牙连接系统的蓝牙连接方法，其包括：
初始化所述模式可切换的蓝牙设备并运行所述移动设备操作系统；
通过所述模式可切换的蓝牙设备查询所述目标蓝牙设备；以及
在所述模式可切换的蓝牙设备无法与所述目标蓝牙设备建立连接的情况下，通过切换所述模式可切换的蓝牙设备的连接模式来与所述外部蓝牙设备建立连接。
可选的，根据本申请实施例的蓝牙连接系统，其中初始化步骤包括：
将所述模式可切换的蓝牙设备中的蓝牙组件设置为主模式。
可选的，根据本申请实施例的蓝牙连接系统，其中在所述模式可切换的蓝牙设备无法与所述目标蓝牙设备建立连接的情况下，通过切换所述模式可切换的蓝牙设备的连接模式来与所述外部蓝牙设备建立连接的步骤包括：
在所述模式可切换的蓝牙设备的连接查询时间超过预设的连接时间阈值时控制所述蓝牙组件切换到从模式；以及
所述模式可切换的蓝牙设备与所述外部蓝牙设备建立连接。
可选的，根据本申请实施例的蓝牙连接系统，其中所述在所述模式可切换的蓝牙设备无法与所述目标蓝牙设备建立连接的情况下，通过切换所述模式可切换的蓝牙设备的连接模式来与所述外部蓝牙设备建立连接的步骤包括：
在所述模式可切换的蓝牙设备检测到目标蓝牙设备的接收信号强度值(RSSI)低于预设的信号强度阈值时控制所述蓝牙组件切换到从模式；以及
所述模式可切换的蓝牙设备与所述外部蓝牙设备建立连接。
根据本申请实施例提供的技术方案，通过提供模式可切换的蓝牙设备，能够显著提高多设备蓝牙连接系统的运行可靠性，消除了由于单个蓝牙设备的异常或者不在连接范围内等状况所可能导致整个多设备蓝牙连接系统失效的隐患。另外，基于本申请实施例提供的模式可切换的蓝牙设备，能够提供贴合不同场景和不同用户需求的定制化蓝牙连接解决方案，使得相应场景中的蓝牙连接方式更为柔性和可变，从而提供现有技术所无法给予的良好用户体验。
附图说明
构成本申请的一部分的附图用来提供对本申请的进一步理解，使得本申请的其它特征、目的和优点变得更明显。本申请的示意性实施例附图及其说明用于解释本申请，并不构成对本申请的不当限定。在附图中：
图1是根据本申请实施例的模式可切换蓝牙设备10的示意性框图；
图2是根据本申请实施例的包括多个蓝牙设备的蓝牙连接系统100的示意性框图；以及
图3是根据本申请实施例的用于上述蓝牙连接系统100的蓝牙连接方法的流程图。
具体实施方式
为了使本技术领域的人员更好地理解本申请方案，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分的实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都应当属于本申请保护的范围。
此外，术语“安装”、“设置”、“设有”、“连接”、“配置为”应做广义理解。例如，可以是固定连接，可拆卸连接，或整体式构造；可以是机械连接，或电连接；可以是直接相连，或者是通过中间媒介间接相连，又或者是两个装置、元件或组成部分之间内部的连通。对于本领域普通技术人员而言，可以根据具 体情况理解上述术语在本申请中的具体含义。
需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。下面将参考附图并结合实施例来详细说明本申请。
根据本申请的一个方面提供了一种模式可切换的蓝牙设备，如图1所示，该模式可切换的蓝牙设备10包括：
处理装置11，所述处理装置中装载有(mounted)移动设备操作系统；和
蓝牙组件12，其构造为在所述处理装置的控制下切换连接模式。
在一些实施例中，该模式可切换的蓝牙设备10为车载蓝牙设备，该车载蓝牙设备中包括处理装置11、蓝牙组件12。在一些实施例中，该车载蓝牙设备还包括车载扬声器、车载麦克风及其他功能模块。
为了实现本申请的目的，上述处理装置11在启动时会运行移动设备操作系统。在一些实施例中，使用Android系统作为该处理装置11的操作系统。
蓝牙
Figure PCTCN2018111624-appb-000001
是一种无线技术标准，可实现固定设备、移动设备和楼宇个人域网之间的短距离数据交换(使用2.4-2.485GHz的ISM波段的UHF无线电波)。
安卓平台提供对蓝牙的通讯栈的支持，允许设别和其他的设备进行无线传输数据。应用程序层通过安卓API来调用蓝牙的相关功能，这些API使程序无线连接到蓝牙设备，并拥有点对点连接或者多端无线连接的特性。
常用的蓝牙相关的安卓API如下面的表1所示：
Figure PCTCN2018111624-appb-000002
Figure PCTCN2018111624-appb-000003
表1
根据本申请的上述实施例，以车载蓝牙设备为上述模式可切换的蓝牙设备的实例，其中车载蓝牙设备在启动时运行安卓操作系统。在一些实施例中，本申请技术方案使用标准安卓系统中的指令组合来实现蓝牙组件的主-从模式切换；在另一些实施例中，本申请技术方案使用适配的(adapted)API来实现蓝牙组件的主-从模式切换的功能，其中当检测到目标蓝牙设备的连接异常状况时，通过调用上述API来控制所述蓝牙组件切换主-从模式。
在一些实施例中，上述目标蓝牙设备以蓝牙耳机为实例。可选的，该蓝牙耳机能够与具备蓝牙功能的任意用户终端(例如智能手机)之间建立蓝牙连接，同时该蓝牙耳机还能够与上述模式可切换的蓝牙设备建立连接。
可选的，该蓝牙耳机被设置为从模式，从而能够与各自设置成主模式的车载蓝牙设备(即上述模式可切换蓝牙设备)和外部蓝牙设备(智能手机)分别建立蓝牙链接。这种多蓝牙设备连接系统能够实现在两个以上蓝牙设备之间提供所需要的数据传输通道以及相应的节点控制，从而能够适用于更为复杂的应用场景、并且提供更加符合用户需求的解决方案。
如图2所示，本申请的一些实施例提供了包括多个蓝牙设备的蓝牙连接系 统100，其包括：
以车载蓝牙设备为实例的模式可切换蓝牙设备10；
以蓝牙耳机为实例的目标蓝牙设备20，所述目标蓝牙设备20设置为从模式；以及
以智能手机为实例的外部蓝牙设备30，其中所述外部蓝牙设备30设置为主模式，
其中所述模式可切换的蓝牙设备10构造为在无法与所述目标蓝牙设备20建立连接的情况下，通过切换连接模式来与所述外部蓝牙设备30建立连接。
在蓝牙耳机出现故障、电量不足、处于车载蓝牙设备的连接距离之外等异常状况时，如果车载蓝牙设备和智能手机各自保持原有的模式设置(此时均为主模式)，则二者无法直接建立蓝牙链接以提供普通的点对点数据传输应用，在这种情况下上述多蓝牙设备连接系统无法顺利转变成点对点蓝牙连接系统。
为了消除上面描述的隐患，根据本申请的一些实施例，车载蓝牙设备在启动时初始设置为主模式，然后在无法与所述目标蓝牙设备(即本示例中的蓝牙耳机)建立连接的情况下，通过切换自身的连接模式来与外部蓝牙设备(智能手机)建立连接。
下面以一个具体车载场景为例，对本申请的技术方案进行详细描述。
首先车载蓝牙设备启动，默认将其设置为主模式；在该模式下，车载蓝牙设备主动搜寻车载蓝牙耳机并发起链接，如果链接成功，则车载蓝牙设备保持现有链接；
如果在一段时间内(如三分钟)搜寻蓝牙耳机和链接失败，即出现了异常状态，则车载蓝牙设备退出主模式、进入从模式，并在车载显示界面提示系统进入车载蓝牙从模式；
上述异常状态包括：
1、当蓝牙耳机出现异常，车载蓝牙设备与蓝牙耳链接出现断开，则车载蓝牙设备主动回链蓝牙耳机，在一段时间内(如三分钟)搜寻和链接失败，则车载蓝牙设备退出主模式，进入从模式，并在车载显示界面提示系统进入车载 蓝牙从模式；
2、当蓝牙耳机与车载蓝牙设备之间的距离超出预定的阈值后，车载蓝牙设备检测蓝牙耳机的信号质量，当信号质量达到一定值后主动发起连接，如果质量较差或者无信号，车载蓝牙模块一直处于从模式。
这里一般地检测蓝牙耳机的RSSI值(接收信号强度)来作为蓝牙耳机的信号质量的指标。
在一些实施例中，作为外部蓝牙设备实例的智能手机可以提供对于A2DP音频传输协议的支持，从而可以与蓝牙耳机、或者与车载蓝牙设备建立链接并传输高质量音频数据。
A2DP(Advanced Audio Distribution Profile)全称是高级音频分发框架，该协议适用于进行高品质音频数据的传输，具体的是利用在L2CAP层建立起来的ACL异步无连接链路来传输高质量的单声道或者立体声音频数据。基于A2DP协议在智能手机和其他蓝牙设备之间建立连接，能够采用耳机内的芯片来堆栈数据，以实现所传输的音频数据的高清晰度呈现。
按照一般的流程，两台蓝牙设备之间的连接是如下进行的。首先，主单元使用GIAC和DIAC查询一定范围内(查询子状态)的蓝牙设备。如果附近的蓝牙设备正在侦听这些查询(查询扫描子状态)，它就会通过发送自己的地址和时钟信息(FHS数据包)给主单元(查询响应子状态)来响应主单元。发送这些信息之后，从单元就开始侦听来自主单元的寻呼消息(寻呼扫描)。主单元在发现范围内的蓝牙设备之后可以寻呼这些设备(寻呼子状态)以建立连接。处于寻呼扫描状态的从单元如果被该主单元寻呼到，则从单元可以立即用自己的设备访问码(DAC)作为响应(从单元响应子状态)。主单元接收到来自从单元的响应之后即可传送主单元的实时时钟、BD_ADDR、BCH奇偶位以及设备类别(FHS数据包)作为响应。从单元收到该FHS数据包后，主单元和从单元即进入连接状态。
蓝牙设备建立连接的流程中主要涉及如下几种状态：
寻呼(Page)：该子状态被主单元用来激活和连接从单元。主单元通过在 不同的跳频信道内传送从单元的设备访问码(DAC)来发出寻呼消息。
寻呼扫描(Page scan)：在该子状态下，从单元在一个窗口扫描存活期内侦听自己的设备访问码(DAC)。在该扫描窗口内从单元以单一跳频侦听(源自其寻呼跳频序列)。
从单元响应(Slave response)：从单元在该子状态下响应其主单元的寻呼消息。如果处于寻呼扫描子状态下的从单元和主单元寻呼消息相关即进入该状态。从单元接收到来自主单元的FHS数据包之后即进入连接状态。
主单元响应(Master response)：主单元在收到从单元对其寻呼消息的响应之后即进到该子状态。如果从单元回复主单元则主单元发送FHS数据包给从单元，然后主单元进入连接状态。
查询(Inquiry)：查询用于发现相邻蓝牙设备的身份。发现单元收集蓝牙设备地址和所有响应查询消息的单元的时钟。
查询扫描(Inquiry scan)：在该状态下，蓝牙设备侦听来自其他设备的查询。此时扫描设备可以侦听一般查询访问码(GIAC)或者专用查询访问码(DIAC)。
查询响应(Inquiry response)：对查询而言，只有从单元才可以响应而主单元则不能。从单元用FHS数据包响应，该数据包包含了从单元的设备访问码、内部时钟和某些其他从单元信息。
一个典型的寻呼过程按照如下步骤进行：
1)一个设备(源)寻呼另外一个设备(目的)，此时处于寻呼状态(Page state)。
2)目的设备接收到该寻呼，此时处于寻呼扫描状态(Page Scan state)。
3)目的设备发送对源设备的回复，此时处于子设备响应状态(Slave Response state)。
4)源设备发送FHS包到目的设备，此时处于主设备响应状态(Master Response state)。
5)目的设备发送第二个回复给源设备，此时处于子设备响应状态(Slave  Response state)。
6)目的和源设备切换并采用源信道的参数，此时处于主设备响应状态和子设备响应状态。
在另一些实施例中，使用Microsoft的WINCE系统作为该处理装置11的操作系统。
根据本申请实施例的又一方面，还提供了一种用于上述蓝牙连接系统的蓝牙连接方法，如图3所示，该蓝牙连接方法包括：
S1，初始化所述模式可切换的蓝牙设备并运行所述移动设备操作系统；
S2，通过所述模式可切换的蓝牙设备查询所述目标蓝牙设备；以及
S3，在所述模式可切换的蓝牙设备无法与所述目标蓝牙设备建立连接的情况下，通过切换所述模式可切换的蓝牙设备的连接模式来与所述外部蓝牙设备建立连接。
可选的，根据本申请实施例的蓝牙连接系统，其中初始化步骤包括：
将所述模式可切换的蓝牙设备中的蓝牙组件设置为主模式。
可选的，根据本申请实施例的蓝牙连接方法，其中在所述模式可切换的蓝牙设备无法与所述目标蓝牙设备建立连接的情况下，通过切换所述模式可切换的蓝牙设备的连接模式来与所述外部蓝牙设备建立连接的步骤包括：
在所述模式可切换的蓝牙设备的连接查询时间超过预设的连接时间阈值时控制所述蓝牙组件切换到从模式；以及
所述模式可切换的蓝牙设备与所述外部蓝牙设备建立连接。
可选的，根据本申请实施例的蓝牙连接方法，其中所述在所述模式可切换的蓝牙设备无法与所述目标蓝牙设备建立连接的情况下，通过切换所述模式可切换的蓝牙设备的连接模式来与所述外部蓝牙设备建立连接的步骤包括：
在所述模式可切换的蓝牙设备检测到目标蓝牙设备的接收信号强度值(RSSI)低于预设的信号强度阈值时控制所述蓝牙组件切换到从模式；以及
所述模式可切换的蓝牙设备与所述外部蓝牙设备建立连接。
显然，本申请实施例通过提供模式可切换的蓝牙设备，能够显著提高多设 备蓝牙连接系统的运行可靠性，在蓝牙耳机出现故障、电量不足、处于车载蓝牙设备的连接距离之外等异常状况时，能够使得上述多蓝牙设备连接系统顺利切换成点对点蓝牙连接系统，由此消除了由于单个蓝牙设备的异常或者不在连接范围内等状况所可能导致的整个多设备蓝牙连接系统失效的隐患。另外，基于本申请实施例提供的模式可切换的蓝牙设备，使得相应场景中的蓝牙连接方式更为柔性和可变，从而能够提供贴合不同场景和不同用户需求的定制化蓝牙连接解决方案。
以上所述仅为本申请的优选实施例而已，并不用于限制本申请，对于本领域的技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均包含在本申请的保护范围之内。
工业实用性
根据上面实施例提供的技术方案，通过提供模式可切换的蓝牙设备，能够显著提高多设备蓝牙连接系统的运行可靠性，消除了由于单个蓝牙设备的异常或者不在连接范围内等状况所可能导致整个多设备蓝牙连接系统失效的隐患。另外，基于本申请实施例提供的模式可切换的蓝牙设备，能够提供贴合不同场景和不同用户需求的定制化蓝牙连接解决方案，使得相应场景中的蓝牙连接方式更为柔性和可变，从而提供现有技术所无法给予的良好用户体验。

Claims (14)

  1. 一种模式可切换的蓝牙设备，其特征在于，包括：
    处理装置，所述处理装置中装载有移动设备操作系统；和
    蓝牙组件，其构造为在所述处理装置的控制下切换连接模式。
  2. 根据权利要求1所述的蓝牙设备，其特征在于，所述蓝牙组件构造为在所述处理装置的控制下初始设置为主模式，用于与设置为从模式的目标蓝牙设备建立连接。
  3. 根据权利要求2所述的蓝牙设备，其特征在于，所述处理装置构造为监控所述蓝牙组件的连接查询时间，并且在所述连接查询时间超过预设的连接时间阈值时控制所述蓝牙组件设置为从模式。
  4. 根据权利要求2所述的蓝牙设备，其特征在于，所述处理装置构造为获得所述目标蓝牙设备的接收信号强度值(RSSI)，并且在所述接收信号强度值低于预设的信号强度阈值时控制所述蓝牙组件设置为从模式。
  5. 根据权利要求1所述的蓝牙设备，其特征在于，
    所述移动设备操作系统包括安卓操作系统和WINCE操作系统之一。
  6. 一种蓝牙连接系统，其特征在于，包括：
    如权利要求1所述的模式可切换的蓝牙设备；
    目标蓝牙设备，所述目标蓝牙设备设置为从模式；以及
    外部蓝牙设备，其中所述外部蓝牙设备设置为主模式，
    其中所述模式可切换的蓝牙设备构造为在无法与所述目标蓝牙设备建立连接的情况下，通过切换连接模式来与所述外部蓝牙设备建立连接。
  7. 根据权利要求6所述的蓝牙连接系统，其特征在于，所述模式可切换的蓝牙设备构造成初始设置为主模式，并且在无法与所述目标蓝牙设备建立连接的情况下变更设置为从模式。
  8. 根据权利要求7所述的蓝牙连接系统，其特征在于，所述处理装置构造为监控所述蓝牙组件的连接查询时间，并且在所述连接查询时间超过预设的连接时间阈值时控制所述蓝牙组件设置为从模式。
  9. 根据权利要求8所述的蓝牙连接系统，其特征在于，所述连接时间阈值为3分钟。
  10. 根据权利要求7所述的蓝牙连接系统，其特征在于，所述处理装置构造为获得所述目标蓝牙设备的接收信号强度值(RSSI)，并且在所述接收信号强度值低于预设的信号强度阈值时控制所述蓝牙组件设置为从模式。
  11. 一种用于如权利要求6所述的蓝牙连接系统的蓝牙连接方法，其特征在于，包括：
    初始化所述模式可切换的蓝牙设备并运行所述移动设备操作系统；
    通过所述模式可切换的蓝牙设备查询所述目标蓝牙设备；以及
    在所述模式可切换的蓝牙设备无法与所述目标蓝牙设备建立连接的情况下，通过切换所述模式可切换的蓝牙设备的连接模式来与所述外部蓝牙设备建立连接。
  12. 根据权利要求11所述的蓝牙连接方法，其特征在于，所述初始化步骤包括：
    将所述模式可切换的蓝牙设备中的蓝牙组件设置为主模式。
  13. 根据权利要求12所述的蓝牙连接方法，其特征在于，所述在所述模式可切换的蓝牙设备无法与所述目标蓝牙设备建立连接的情况下，通过切换所述模式可切换的蓝牙设备的连接模式来与所述外部蓝牙设备建立连接的步骤包括：
    在所述模式可切换的蓝牙设备的连接查询时间超过预设的连接时间阈值时控制所述蓝牙组件切换到从模式；以及
    所述模式可切换的蓝牙设备与所述外部蓝牙设备建立连接。
  14. 根据权利要求12所述的蓝牙连接方法，其特征在于，所述在所述模式可切换的蓝牙设备无法与所述目标蓝牙设备建立连接的情况下，通过切换所述模式可切换的蓝牙设备的连接模式来与所述外部蓝牙设备建立连接的步骤包括：
    在所述模式可切换的蓝牙设备检测到目标蓝牙设备的接收信号强度值(RSSI)低于预设的信号强度阈值时控制所述蓝牙组件切换到从模式；以及
    所述模式可切换的蓝牙设备与所述外部蓝牙设备建立连接。
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