Page 521 - From GMS to LTE

Bluetooth and Bluetooth Low Energy 507

From this description it becomes clear that IPv6‐enabled BLE devices are likely to
require more processing capacity and might have higher power consumption compared
to a power‐optimized BLE device that uses the ATT protocol to exchange small amounts
of information. Nevertheless IPv6 BLE devices can still benefit from many of the power‐
saving features of the Bluetooth Low Energy radio architecture, especially if only small
amounts of data are transmitted very infrequently.

Questions

1. What are the maximum speeds that can be achieved by Bluetooth and on what do
they depend?

2. What is FHSS and which enhanced functionalities are available with Bluetooth 1.2
in this regard?

3. What is the difference between inquiry and paging?

4. What kinds of power‐saving mechanisms exist for Bluetooth devices?

5. What are the tasks of the link manager?

6. How can several data streams for different applications be transferred simultaneously
by the L2CAP protocol?

7. What are the tasks of the service discovery database?

8. How can several services use the RFCOMM layer simultaneously?

9. What is the difference between authentication and authorization?

10. Why are such a high number of different Bluetooth profiles required?

11. Which profiles can be used to quickly transfer files and objects between two
Bluetooth devices?

12. What are the differences between the hands‐free profile and the SIM access
profile?

13. Describe the differences between the ‘classic’ Bluetooth and the Bluetooth Low
Energy air interface.

14. How is data transferred over the BLE ATT protocol?

Answers to these questions can be found on the companion website for this book at
http://www.wirelessmoves.com.