Replacing Aloha with a Near Perfect Universal MAC
Aloha is a predecessor of Ethernet which has a maximum theoretical efficiency near 50%. Distributed Queuing Switch Architecture was invented for cable TV as a ~100% universal MAC for simultaneous synchronous and asynchronous flows on a single channel, however, the first demonstrations have occurred on Internet of Things radio networks Zigbee and LoRa, winning an IEEE and Google Research Award.
The CTTC network: http://technologies.cttc.es/iotworld-experimental-platform/iotworld-dq/
The link to the LoRa work from Bucknell http://github.com/Kuree/DQN
...and the thesis https://digitalcommons.bucknell.edu/cgi/viewcontent.cgi?referer=https://www.google.com/&httpsredir=1&article=1406&context=honors_theses
Attached, please find the first fully drawn protocol specification to be used as a starting point for interoperable DQ networks which can coexist with any IEEE 802.x.x. Please also review a more recent 5G simulation where DQ replaced Aloha in the 5G Random Access Channel. https://ieeexplore.ieee.org/document/8880524