31-08-2017, 11:19 AM
Bluetooth is a low-power short-range wireless communications standard. In more technical terms, Bluetooth operates in the range of 2400 to 2483.5 MHz within the 2.4 GHz ISM frequency band, which is available without license in much of the world. Unlike sub-GHz bands, and because this band has similar regulations everywhere, it has proven to be much more popular for many consumer devices (and is also used for most Wi-Fi connections). The data is divided into packets and exchanged through one of the 79 designated Bluetooth channels, each of which has one MHz of bandwidth. It was originally designed for continuous data transmission applications that exchange data at close range.
But there is an obvious problem that has quite a few implications for smart sensor networks based on Bluetooth, and that problem is range performance.
In other words, it can be very difficult for a distributed network using a low power system. The way around this problem is to form a mesh, where a network of nodes communicate with each other and retransmit data. However, with mesh of Bluetooth networks comes an avalanche of potential problems, manifested in various ways.
But there is an obvious problem that has quite a few implications for smart sensor networks based on Bluetooth, and that problem is range performance.
In other words, it can be very difficult for a distributed network using a low power system. The way around this problem is to form a mesh, where a network of nodes communicate with each other and retransmit data. However, with mesh of Bluetooth networks comes an avalanche of potential problems, manifested in various ways.