10 Facts About Packet radio

In digital radio, packet radio is the application of packet switching techniques to digital radio communications.

Packet radio uses a packet switching protocol as opposed to circuit switching or message switching protocols to transmit digital data via a radio communication link.

Packet radio can be differentiated from other digital radio switching schemes by the following attributes:.

Professor Norman Abramson of the University of Hawaii led development of a packet radio network known as ALOHAnet and performed a number of experiments beginning in the 1970s to develop methods to arbitrate access to a shared radio channel by network nodes.

Amateur radio operators began experimenting with packet radio in 1978, when—after obtaining authorization from the Canadian government—Robert Rouleau, VE2PY; Bram Frank, VE2BFH; Norm Pearl, VE2BQS; and Jacques Orsali, VE2EHP of the Montreal Amateur Radio Club Montreal, Quebec began experimenting with transmitting ASCII encoded data over VHF amateur radio frequencies using homebuilt equipment.

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Packet radio started becoming more and more popular across North America and by 1984 the first packet-based bulletin board systems began to appear.

Packet radio proved its value for emergency operations following the crash of an Aeromexico airliner in a neighborhood in Cerritos, California in August, 1986.

One of the first challenges faced by amateurs implementing packet radio is that almost all amateur radio equipment has historically been designed to transmit voice, not data.

Modems used for packet radio vary in throughput and modulation technique, and are normally selected to match the capabilities of the radio equipment in use.

Packet radio has most often been used for direct, keyboard-to-keyboard connections between stations, either between two live operators or between an operator and a bulletin board system.