QCMR is a military streaming protocol, designed for real-time data transmission with very high availability. In contrast to the single-channel distribution system of 802.11n, it creates individual links between nodes, each of which can operate at a different frequency. These links and frequencies are manipulated dynamically to create the optimum path through the network.

 

Instead of the “polite” listen-before-talk access mode of 802.11n, QCMR checks the availability of a path as it uses it, and will switch to another path/channel if there is a problem. Devices using this protocol can form a backbone to carry traffic from Internet access-type nodes, but 802.11n cannot be guaranteed to carry QCMR data due to the reasons outlined above. Traffic lights and CCTV are prime users of streaming, second-by-second data.