Pakettiradio

Pakettiradio is a digital radio communication system that transmits data in small packets. Unlike traditional analog radio which transmits information continuously, pakettiradio breaks data into discrete units or packets. Each packet contains a portion of the data, along with addressing and error-checking information. This allows for more efficient use of the radio spectrum and enables multiple users to share the same frequency.

The concept of pakettiradio emerged from early packet-switched networks, like ARPANET, adapted for wireless communication. It is often used in amateur radio (ham radio) circles, where it facilitates computer-to-computer communication over radio waves. This enables functionalities such as email, bulletin board systems, and real-time text messaging between radio operators without relying on existing internet infrastructure.

The operation involves a terminal node controller (TNC) which acts as an interface between a computer and a radio transceiver. The TNC handles the encoding and decoding of data into packets and manages the transmission and reception process. Various protocols have been developed for pakettiradio, with AX.25 being a widely adopted standard, based on the X.25 protocol.

Pakettiradio systems can operate on a variety of radio frequencies, often utilizing VHF and UHF bands. They are particularly valuable in situations where conventional communication methods are unavailable or unreliable, such as during emergencies or in remote locations. The decentralized nature of pakettiradio networks also contributes to their resilience.