+------------------------------------+
                       |             Application            |
          +---------+  +------------------------------------+
          |  IPSS   |  |            UDP/TCP/other           |
          +---------+  +------------------------------------+
          |  GATT   |  |             IPv6  |routing|        |
          +---------+  +------------------------------------+
          |  ATT    |  | 6Lo for IPv6 mesh over Bluetooth LE|
          +---------+--+------------------------------------+
          |                 Bluetooth LE L2CAP              |
  HCI - - +-------------------------------------------------+ - - 
          |               Bluetooth LE Link Layer           |
          +-------------------------------------------------+
          |             Bluetooth LE Physical Layer         |
          +-------------------------------------------------+