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Bluetooth multi-terminal link switching method, Bluetooth audio equipment and Bluetooth system

A Bluetooth audio and link switching technology, applied in transmission systems, digital transmission systems, and multiple use of transmission paths, can solve problems such as inability to transmit data, lack of information exchange functions, and asynchronous playback of dual headphones, avoiding The effect of data loss and synchronous reception of data

Active Publication Date: 2020-09-11
NANJING ZGMICRO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As shown in the above solution, after the first Bluetooth headset forms a scatternet together with the first terminal and the second terminal, sometimes it is necessary to switch the reception of the first Bluetooth headset from the first terminal to the second terminal, because the second Bluetooth The earphone receives the audio data of the master device completely synchronously with the first Bluetooth earphone by listening. The second bluetooth earphone and the first bluetooth earphone are always in the same sending / receiving state and cannot perform independent data transmission. One bluetooth earphone can realize rapid switching when it needs to switch links, while the second bluetooth earphone is still in the previous link due to the lack of information exchange function and passively receives the information packet sent by the master device, which will cause the playback content of the two earphones to be inconsistent. Synchronize

Method used

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  • Bluetooth multi-terminal link switching method, Bluetooth audio equipment and Bluetooth system
  • Bluetooth multi-terminal link switching method, Bluetooth audio equipment and Bluetooth system
  • Bluetooth multi-terminal link switching method, Bluetooth audio equipment and Bluetooth system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] This embodiment is a Bluetooth multi-terminal link switching method, wherein piconet 1, piconet 2, and piconet 3 all use an asynchronous data link (ACL) to transmit audio data packets via the AVDTP protocol.

[0051] Such as figure 2 Shown in is the flowchart of this embodiment.

[0052] S100: Transmitting audio data based on the piconet 1, the first terminal sends an audio data packet to the first Bluetooth earphone through the ACL via the AVDTP protocol (Audio / Video Distribution Transport Protocol audio and video distribution transmission protocol), and the second Bluetooth headset According to the first link parameter of the piconet 1, the earphone synchronously receives the audio data packet through the listening link. In the piconet 1, the first terminal acts as a master device (Master), and the first Bluetooth headset acts as a slave device (Slave);

[0053] S200: When the user issues a link switching command to the first Bluetooth headset through an external i...

Embodiment 2

[0080] This embodiment is a Bluetooth multi-terminal link switching method, wherein piconet 1 and piconet 3 both use an asynchronous data link (ACL), and piconet 2 uses a synchronous data link (ESCO).

[0081] This embodiment and figure 2 The embodiment 1 process shown in is basically the same, the difference is:

[0082] S200: The first Bluetooth headset polls and finds that the second terminal in the piconet 2 has sent Alerting signaling to the first Bluetooth headset through the asynchronous data link (ACL) via the HFP protocol, requesting to establish a synchronous data link (ESCO), because The priority of Alerting signaling is higher than the operation of receiving audio data packets, and the link switching instruction is triggered.

[0083] Such as Figure 4 Shown is the time slot allocation diagram of this embodiment.

[0084] time slice S 1 It is a time segment of piconet 1 starting with the master-slave time slot and ending with the master-slave time slot, and th...

Embodiment 3

[0100] This embodiment is a Bluetooth multi-terminal link switching method, wherein piconet 3 adopts asynchronous data link (ACL), and piconet 1 and piconet 2 both adopt synchronous data link (eSCO).

[0101] This embodiment and figure 2 The embodiment 1 process shown in is basically the same, the difference is:

[0102] S200: The first Bluetooth headset polls and finds that the second terminal in the piconet 2 has sent Alerting signaling to the first Bluetooth headset through the asynchronous data link (ACL) via the HFP protocol, requesting to establish a synchronous data link (eSCO). A Bluetooth headset can prompt the user whether to switch, such as playing a piece of prompt audio, etc. If the user manually issues a link switching command, the first Bluetooth headset will execute the link after receiving the last real-time voice data packet before triggering the link switching command. switch operation.

[0103] Such as Figure 5 Shown is the time slot allocation diagram...

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Abstract

The invention relates to the technical field of Bluetooth communication, in particular to a Bluetooth multi-terminal link switching method, Bluetooth audio equipment and a Bluetooth system. The methodcomprises the following steps: a first terminal establishes a first link with a first Bluetooth audio device, and a second Bluetooth audio device monitors and receives data of the first link according to a first link parameter; a link switching instruction is triggered; the first Bluetooth audio device sends an instruction to the first terminal, so that the first terminal suspends sending of datapackets in a specified number of time slots; in the specified number of time slots, the first Bluetooth audio device sends a second link parameter; and the second Bluetooth audio device receives thesecond link parameter, and monitors and receives data of a second link according to the second link parameter. According to the invention, when the first Bluetooth audio device and the second Bluetooth audio device realize switching of the terminal devices, the data can be synchronously received.

Description

technical field [0001] The invention relates to the technical field of bluetooth communication, in particular to a bluetooth multi-terminal link switching method, bluetooth audio equipment and a system. Background technique [0002] Bluetooth is an open technology standard for wireless data and voice communications that enables short-range data exchange between fixed and mobile devices and personal area networks in buildings. [0003] According to the Bluetooth protocol, a piconet includes a Bluetooth master device (Master) and up to seven Bluetooth slave devices (Slave). The Bluetooth network provides a clock from the master device and uses a frequency of 1600 hops per second for frequency hopping communication. In the Bluetooth specification The concept of time slot (Slot) is defined in , a time slot is 625us, and Bluetooth time slots include alternating master-slave (Master-Slave) time slots and slave-master (Slave-Master) time slots. In the Bluetooth network Data transm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/80H04W36/00H04W72/04H04W76/14H04W76/27H04L5/00
CPCH04W4/80H04W76/14H04W76/27H04W36/0011H04W72/0446H04L5/0055Y02D30/70
Inventor 高迎宾袁泉夏玮玮燕峰沈连丰张亦农
Owner NANJING ZGMICRO CO LTD
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