Bluetooth Flashcards
What does BLE stand for?
Bluetooth Low Energy
In BLE terminology, what is a ‘GATT’?
Generic Attribute Profile
BLE is particularly designed for:
Short-range, low-power communication.
Which of the following supports low energy radio operation.
BLE
Which version of Bluetooth introduced BLE?
Bluetooth 4.0
BLE supports which kind of communication topology?
Mesh
Star
Point-to-Point
What is a characteristic of BLE ‘Advertising’ mode?
Device discovery and connection establishment.
In BLE, what is the role of a ‘Central’ device?
It connects to and controls peripheral devices.
Which feature distinguishes BLE from Classic Bluetooth?
Lower energy consumption
Which frequency band does BLE operate in?
2.4 Ghz
What is the range typically achievable with BLE technology?
Up to 100 meters
What is the maximum data rate of latest BLE?
2 Mbps
Bluetooth is designed for short broadcast. There are forty 2-Mhz channels. How many of these channels are reserved for advertising? (enter numerical number)
3
Which of the following scheme is used by Bluetooth?
Frequency hopping TDD scheme
If the number of carrier frequencies is equal to 25, how many outputs bits must be generated by the PRN generator? (Assume FHSS)
5
If the bandwidth of the spread spectrum signal is 180MHz and the signal bandwidth is 15MHz. How many carrier frequencies are required for generating the spread spectrum signal?
12
Which of the following Topology does Bluetooth 4.0 support?
Star
Mesh
Assuming Bob can send 300 bits in one slot while using Bluetooth. How many slots does it take to send 600 bits?
3
Assume Bob can send 300 bits in one slot while using Bluetooth. How many slots does it take to send 1200 bits?
5
What does ‘Pairing’ in BLE involve?
Exchanging security keys for secure communication.
If the hopping time, assuming FHSS, is equal to 500μs, how many times would the signal hopped in one second? (you can select more than one option)
2000
(all of the options appear to be wrong)
