Global Mobile Satellite Communications Theory by Stojče Dimov Ilčev

Author:Stojče Dimov Ilčev
Language: eng
Format: epub
Publisher: Springer International Publishing, Cham

3.5.6.3 Slot Reservation Aloha

This solution of an extension for the slotted Aloha scheme allows time slots to be reserved for transmission by an Earth station. In general terms, this mode of operation is termed as a Packed Reserved Multiple Access (PRMA). Slot reservation basically takes the following two forms:

1. Implicit—When a station acquires a slot and successfully transmits, the slot is reserved for that station for as long as it takes the station to complete its transmission. The network controller then informs all stations on the network that the slot is available for contention once more. There is only the problem that a station with much data to transmit could block the system to other users.

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