Chapter: Network Concepts and Standards
Packet Reservation Multiple Access (PRMA) has been developed by D. Goodman et al. at Winlab at Rutgers University. It applies Time Assigned Speech Interpolation (TASI) as multiple access method in wireless networks, while previously TASI was almost exclusively used for multiplexing on satellite links.
PRMA is a multiple access scheme with frames of a fixed number of slots. If a terminal has a series of data packets (or speech segments) to transmit, it competes for access in any free slot. If it successfully captures the base station, the terminal gains reservation in the corresponding slots of the next frames, until it releases the reservation.
In PRMA, adjacent cells use different carrier frequencies according to a cellular reuse plan.