How has Kleer addressed ISM band co-existence to ensure good audio quality?
Kleer transmits packetized audio and uses buffers to allow the re-transmission of corrupted packets. Kleer uses Dynamic Channel Selection to dynamically select one of 16 narrowband channels distributed across the 2.4GHz ISM band. Packets are transmitted on a given channel as long as that channel is performing well. When interference starts causing too many packet re-transmissions, the radio will rapidly switch to another channel, with the fore-knowledge that the new channel is not occupied. Even when there is severe interference, such as that caused by multiple simultaneous wireless LANs, Kleer can select a channel that fits in between the commonly used wireless LAN channels.
