Physical and Data Link Layer Performance Enhancement in MANET to Overcome Hidden -Exposed Node Problem and Packet Loss Due to Buffer Overflow

Abstract

In order to improve the performance of the MANET , the lower layers of MANET protocol stack has to improve the performance to overcome the hidden and expose node problem in the Physical layer and better buffer management scheme to be included in the data link layer .MAC layer in MANET ,Some cases the transmission range of the node can be idle but due to Hidden and Exposed node , the node could not be send the packet to other nodes. Node has to wait unnecessarily event the transmission medium is free. In case of more traffic in the MANET can leads to overflow in the buffer which causes the packet loss in the transmission. If any packet missed on the transmission the source node has to retransmit to the destination. This research article proposed the Mutual Exclusion MAC protocol for avoiding hidden and exposed terminal problem in MANET and active buffer management algorithm named Intelligent better buffer management (IBM) algorithm which improves the MANET nodes buffers to avoid packet loss . The proposed protocol is implemented with the support of Network simulator 3 and results are compared with the existing different protocol proposed for the MAC layer with the parameter and buffer management schemes and results shown the enhanced results shown.