Bluetooth 5 came to market justover a year ago. It was announced by the executive director of Bluetooth SIGthat the new device would revolutionized the iot. The latest version of theBluetooth 5 has much advantages compared to the Bluetooth 4.3 technology suchas longer range, higher speed and extended support for connectionless services.According to market surveys, the Bluetooth will be used in more than one-thirdof all installed IOT devices by 2020.
Typical IoT architecture has mainlyphysical, communication, software and application layers. Bluetooth is actingas a communication protocol, which enables devices communicate each otherwirelessly.The Bluetooth 4.x generationonly supported 1Mbps PHY rate, but Bluetooth 5 generation devices have the caliberto support both 1 Mbps and 2 Mbps PHY rates.
The also leads to double the datatransfer between two devices and the studies shows that the current consumptionis also very low compared to older versions of Bluetooth devices. Thisimprovement effect on the time spent in low-power sleep modes in IoT devices.The fabulous thing is that Bluetooth 5 devices has the backward compatibilitywhich provide support to the Bluetooth 4 devices to perform well in IOT.Bluetooth 5 has the coveragearea by four time than the Bluetooth 4 devices. This means it can cover a wholehouse or a building or it can be use in outdoor or commercial applications andIoT becoming a reality for those areas with the new inventions of Bluetooth 5.In addition to the 2M PHY, Bluetooth 5 contains two additional optional PHYscalled LE Coded PHYs. This code uses slightly different packet format and itincreases the Rx sensitivity which leads to improve the coverage range.
LECoded PHYs has a forward error correction(FEC) and Pattern Mapper. It appliesthe FEC methodology to correct bit errors upon reception of the packet andafter a pattern mapper is applied to the packet to improve the efficiency ofthe communications. The Bluetooth 5 is defined to be +20dBm, while in theBluetooth 4 is to be +10dBm. This increases the Tx power by 10x and it shouldimpact on the coverage range.One improvement regardingadvertisement(beaconing) is the advertising data sets feature, which allows asingle Bluetooth 5 device to send out multiple individual advertisements datasets with unique intervals and advertisement data.
The new Bluetooth can alsodetermine a scan request made by a remote device and report to the applicationlevel. The next improvement is that the three advertisements channels which wereusing in Bluetooth 4 is there in the Bluetooth 5 for backward compatibility,but the Bluetooth 5 devices can use remaining data channels as secondaryadvertisement channels to broadcast more data which improves the capacity ofthe channel. Another improvement is that Bluetooth 5 introduce a periodicadvertising. It allows the transmitter to send out changing beaconing dataperiodically and with a fixed interval may receivers can listen to itBy simple Bluetooth 5 containsmany robust features and improve the wireless standard feature. The Bluetooth 5enabled phones are expected to arrive on the market during 2017 and it needsome time to mature on IoT.
More companies are already build chips whichsupport Bluetooth 5 and it will be a biggest thing waiting to happen in thefeature.