Myth: Interference Makes Bluetooth Connections Unreliable
One of the biggest challenges for any wireless technology in providing reliable data communication is interference. Unlike wired data communications technologies, wireless technologies must share the transmission medium and multiple devices may try to communicate over the same wireless spectrum, in the same general area, and at the exact same time. When this happens, in-air collisions between data packets occur which can make a packet unreadable by the receiving device and effectively lost. Packets being transmitted between two devices can be corrupted or lost if they collide with a packet being transmitted at the exact same time and frequency channel between other in-range devices.
Fact: Bluetooth Technology Is Designed to Overcome Potential Interferers
Bluetooth® technology has adopted several techniques to lower the probability of collisions and offset inevitable packet loss. Two ways Bluetooth technology overcomes potential interferers and enables reliable wireless data communication is by using adaptive frequency hopping and small, fast data packets.
The reliability of any wireless system is all about spectral efficiency: shorter packets equal fewer collisions. Bluetooth packets are typically half the size and four times faster. Having small, fast packets enables more efficient use of the spectrum and significantly lowers the probability of collisions.
Spread spectrum techniques can increase resiliency in busy radio environments where collisions and interference are more likely to occur. Adaptive frequency hopping is a unique spread spectrum technique that enables Bluetooth packets to adapt to avoid active, congested channels. Channels that are noisy and busy are marked and not used. The list of reliable channels and busy channels can change quickly as other wireless communication devices and noise in the environment come and go. Adaptive frequency hopping allows Bluetooth technology to dynamically track which channels are functioning best and find the most reliable path.
Learn more about how Bluetooth® technology supports reliable data communication.
“Bluetooth® is unique in the way it uses technologies like adaptive frequency hopping and MIC that enhance reliability without adversely affecting power consumption.”
– Masuto Nishiura, Kozo Keikaku Engineering