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How to understand the data linker layer and physical layer in the Mesh network?

lgs

Hi There,

I have a question now. If I want to alter the frame format in the data linker, how do I do? 

I try to find the source code of the data linker layer in the Mesh SDK, I cannot find it. I just find the bearer layer. 

Could you help me answer the question?

Best regards,

Gaosheng Liu

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  • +1

    Hi,

    Few (if any) network specifications follow the OSI model completely, and Bluetooth mesh is no exception. What corresponds to the data link layer from the OSI model would be a combination of the bearer layer, some of the underlying BLE specification, and maybe even some of the network layer.

    The bearer layer consists of two options for bearer: BLE advertisements (ADV bearer) and BLE connections (GATT bearer). The format used follows the Bluetooth specification for those options. Changing this may be difficult, in particular the GATT bearer which uses the precompiled BLE stack (that we call "SoftDevice") which cannot be altered.

    Further, changing any part of the Bluetooth mesh stack will void the qualification.

    What is the purpose of changing anything in the bearer layer? Maybe there are other ways to achieve the same goal.

    Regards,
    Terje

  • 0 in reply to tesc

    Hi Terje,

    Nice for your reply. Actually, I want to construct the frame format in the data linker layer by myself. 

    So, I need to know the data linker layer.

    Regards,

    Gaosheng Liu 

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