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loops. In order to counteract propagation delays, a guard-time (Tg) is also added. Hence, in the receiver's perception, each MS-Aloha frame floats within the boundaries of the ideal time-slot, and PLCP is required to properly recover the start of each MS-Aloha frame.
# A node attempting to reserve a slot can simply pick a free one. The same happens if it is already transmitting and wants to continue transmissions in next frame. A transmission is an implicit reservation for next frame. As a result, reservations are confirmed at

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