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Device Manager

  • the functional block in the baseband that controls the general behavior of the Bluetooth device.
  • responsible for all operations not directly related to data transport such as:
    • Inquiry
    • Connect
    • make local device discoverable or connetable.

Device Manager

  • need access to the transport medium to carry out its functions.
  • controls local device behavior by a number of the HCI commands such as:
    • manage local name
    • store link keys.
    • other functionality.

Link Manager

  • responsible for managing logical links(or related logical transports):
    • creation
    • modification
    • release
    • update of parameters related to physical links between devices.
  • using LMP in BR/EDR and LL in LE to achieve the above functions.

Link Manager

  • LM or LL protocol allows:
    • creation of new logical links and logical transports when required.
    • the general control of link and transport attributes such as:
      • enabling of encryption on the logical transport
      • adapting of TX power in BR/EDR on the physical link.
      • adjusting of QoS Settings in BR/EDR for a logical link.

Baseband Resource Manager

  • responsible for all access to the radio medium.
  • has two main functions:
    • a scheduler that grants time on the physical channels.
    • negotiate access contracts with other entities.
  • An access contract is effectively a commitment to deliver a certain QoS reuirement.
  • realignment time between slots on the original physical channel and slots on the new physical channel.
## Link Controller * responsible for the encoding and decoding of Bluetooth packets from data payload. * and parameters related to the physical channel, logical transport and logical link. * carry out link control protocol signaling in BR/EDR and link layer protocol in LE.
## PHY * responsible for transmitting and receiving packets of information on the physical channel.

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