Bluetooth 5 contains two additional optional PHYs

Bluetooth 4 devices. This means it can cover a whole house or a building or it can be use in outdoor or commercial applications and IoT 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 PHYs called LE Coded PHYs.

This code uses slightly different packet format and it increases the Rx sensitivity which leads to improve the coverage range. LE Coded PHYs has a forward error correction(FEC) and Pattern Mapper. It applies the FEC methodology to correct bit errors upon reception of the packet and after a pattern mapper is applied to the packet to improve the efficiency of the communications. The Bluetooth 5 is defined to be +20dBm, while in the Bluetooth 4 is to be +10dBm. This increases the Tx power by 10x and it should impact on the coverage range.One improvement regarding advertisement(beaconing) is the advertising data sets feature, which allows a single Bluetooth 5 device to send out multiple individual advertisements data sets with unique intervals and advertisement data.

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The new Bluetooth can also determine a scan request made by a remote device and report to the application level. The next improvement is that the three advertisements channels which were using in Bluetooth 4 is there in the Bluetooth 5 for backward compatibility, but the Bluetooth 5 devices can use remaining data channels as secondary advertisement channels to broadcast more data which improves the capacity of the channel. Another improvement is that Bluetooth 5 introduce a periodic advertising. It allows the transmitter to send out changing beaconing data periodically and with a fixed interval may receivers can listen to itBy simple Bluetooth 5 contains many robust features and improve the wireless standard feature.

The Bluetooth 5 enabled phones are expected to arrive on the market during 2017 and it need some time to mature on IoT. More companies are already build chips which support Bluetooth 5 and it will be a biggest thing waiting to happen in the feature


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