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Service device discovery method based on bluetooth gap layer

A service device and discovery method technology, applied in the field of service device discovery based on the low-power Bluetooth GAP layer, can solve problems such as increasing the difficulty of development, save memory space, improve device discovery efficiency, and simplify discovery operations.

Active Publication Date: 2021-11-12
苏州博联科技有限公司
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Problems solved by technology

Therefore, work such as device information storage and device selection is left to upper-layer applications or users, which brings additional storage space and time consumption, and increases the difficulty of development

Method used

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  • Service device discovery method based on bluetooth gap layer
  • Service device discovery method based on bluetooth gap layer
  • Service device discovery method based on bluetooth gap layer

Examples

Experimental program
Comparison scheme
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Embodiment

[0030] The present invention proposes a method for discovering service equipment based on the Bluetooth GAP layer, setting a conditional filter module in the device discovery program of the Bluetooth GAP layer in advance, and receiving user input filter conditions, such as figure 2 shown, including the following steps:

[0031] S1. The observer turns on the Bluetooth function and scans the surrounding service devices.

[0032] The serving device acts as a broadcaster and is in broadcast mode. The central device acts as an observer and uses the observer program to receive the broadcast data of the broadcaster. Here, set the observer scan type to passive scan by setting the scan parameter command, that is, no need to send scan request packets, and set the scan time to 5s, and stop scanning after the scan time is up. The reason why the passive scanning state is used is that at the beginning, the observer only needs to obtain the broadcast data of the surrounding service device...

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Abstract

The invention discloses a service device discovery method based on the Bluetooth GAP layer. A device filter module is set in the device discovery program of the Bluetooth GAP layer in advance to receive filter conditions input by users. The method includes the following steps: acquiring broadcast data of the service device ; Extract the effective broadcast information of the scanned service equipment and save it in the equipment information table; filter the equipment information table according to the input filter conditions, and display the filtering results; The device address of the device is added to the white list; the service information of the device is obtained through active scanning and stored. Only the qualified service devices and their information are stored, which not only saves the memory space, but also simplifies the device discovery operation of the upper application program, and improves the device discovery efficiency.

Description

technical field [0001] The invention relates to the technical field of low-power bluetooth communication, in particular to a service device discovery method based on the low-power bluetooth GAP layer. Background technique [0002] At the beginning of the design of the Bluetooth low energy protocol, taking into account the actual application requirements, an asymmetric architecture is adopted, the purpose is to allow devices with less energy to burden less things. In practical applications, this asymmetry is reflected in: the peripheral service device generally only sends broadcast data, is in the broadcast state, and cannot actively initiate a connection; the central device can scan the peripheral device, and can request more from the broadcaster through active scanning information, only initiate connections when necessary. One of the consequences of this asymmetric architecture is the "one-to-many" topology of Bluetooth low energy, such as figure 1 shown. A Bluetooth Low...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/80H04W8/00
CPCH04W8/005H04W4/80
Inventor 王盼
Owner 苏州博联科技有限公司
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