Overview and evaluation of Bluetooth LE

[2014-10-16 Thu 19:40] speaker: Saynee event: Papers We Love SG #003 ** characteristics low power: coin cell lasts 2 - 14 yrs short range: ~50m network: 22 bytes of payload, total packet 41 bytes ** physical layer 2.4 GHz divided into 40 RF channels 3 channels for advertising, that does not overlap with wifi 37 data channels using adaptive frequency hopping ** link layer tuning the lifetime by adjusting connection interval - start of data event to start of next data event (7.5ms - 4000ms) connection slave interval - connsecutive events the slave skips trade-off with power/throughput and data transfer time ** host layer generic attribute profile (key - values) ** BLE integrated circuits TI sensor tag ** comparison to BLE - 1 hop, master slave ZigBee Z-Wave