The Scientific World Journal / 2014 / Article / Tab 1

Research Article

Design and Performance Evaluation of a Distributed OFDMA-Based MAC Protocol for MANETs

Table 1

The types of logical errors ( : a node requesting a reservation of a PDU bin and : a node receiving a resource reservation request from ).

Cause Detection method Actions on detection

LET1 When selects a PDU bin for reservation, it could not know . Inspecting . sends a CTS frame with error type LET1. restarts the reservation process.

LET2 Multiple node pairs attempt to reserve the same PDU bin using different RTS channels at the same time. checks the RTS region of the frame from which it receives a resource reservation request. sends a CTS frame with error type LET2. restarts the reservation process.

LET3 Multiple nodes send RTS frames simultaneously to the same node through different RTS channels to reserve the same PDU bin. checks the RTS region of the frame from which it receives resource reservation requests. randomly selects a winner and assigns another PDU bin to a loser. If is a loser, it uses the assigned PDU bin if it is available. If not, it restarts the reservation process.