The vast majority of current cordless goods for example loudspeakers for outdoors as described at the site amphony.com are limited to just one of the available license-free frequency bands. s . are the 900-MHz, 2.4-GHz and also 5.8-GHz frequency band. I am about to reveal one of the methods that today’s cord-less speakers implement so as to endure various cord-less systems and also to reduce the effect on different devices.
All frequency channels that are occupied are marked as filled. For this purpose, the hop set has to be delivered to every receiver. Independent of the current hop set, the transmitter continues scanning all of the accessible frequency channels and keeps a catalog of backup channels. One of these back-up frequency channels is used just in case a different transmitter begins making use of one of the active hop-set channels to switch the hop-set channel which is busy. One of these methods is data buffering. Data buffering was designed to cope with loss or damage of packets caused by weak receipt or perhaps multipath fading. The packet counter allows the receiver to establish if any packets have been misplaced. Due to the limited quantity of time slots for the back channel, these types of cordless speakers have a limit for how many cord-less speakers are able to operate from one transmitter.