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## Channel Manager * responsible for creating, managing and closing L2CAP channels. * uses the L2CAP protocol to interact with a channel manager on a remote (peer) device to * create these L2CAP channels * connect their endpoints to the appropriate entities.
## Channel Manager * interacts with its local link manager or an AMP PAL to * create new logical links (if necessary) * configure these links to provide the required quality of service for the type of data being transported.
## L2CAP Resource Manager * managing the ordering of submission of PDU fragments to the baseband. * Schedule Resources to access the physical channel. * carry out traffic conformance policing to ensure negotiated QoS settings is met.
## Security Manager Protocol * the P2P protocol used to generate encryption keys and identity keys. * operates over a dedicated fixed L2CAP channel. * manages storage of the encryption keys and identity keys. * responsible for generating random addresses and resolving random addresses to known device identities. * only used in LE systems.
## Attribute Protocol * implements the peer-to-peer protocol between an attribute server and an attribute client. * communicate over a dedicated fixed L2CAP channel. * The ATT client sends commands, requests, and confirmations to the ATT server. * The ATT server sends responses, notifications and indications to the client.
## Generic Attribute Profile * represents the functionality of the attribute server and, optionally, the attribute client. * describes the hierarchy of services, characteristics and attributes used in the attribute server. * The block provides interfaces for discovering, reading, writing and indicating of service characteristics and attributes. * used on LE devices for LE profile service discovery.

Generic Access Profile

  • represents the base functionality common to all Bluetooth devices.
  • GAP services include:
    • device discovery
    • connection modes
    • security
    • authentication
    • association models
    • service discovery

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