Enhancement of the Performance of the Medium Access Control (MAC) Protocol by using Modified New Approach

Wireless networks are the widely used networks for communication now days. Hence it is very necessary to improve the performance of the Medium Access Control (MAC) layer by preventing the communication from collisions. In this work a new scheme is explained, for efficient channel access, which is based on the sequencing. The proposed method minimizes the number of collisions as well as the delays that occur during the backoff periods. When collision occurs in a MAC layer in the network, it may result in decreased throughput in the data transfer. In this way the bandwidth is wasted. Here an analytical study on MAC-layer issues is presented, which are very important when accessing a channel over wireless networks. The main function of Medium Access Control (MAC) is to share the channel efficiently between all nodes. The new approch is used in order to prevent collisions during multiple channel access in MAC Layer. This scheme uses fair distributed mechanisms for channel access. In this method, a counter is introduced at each node to maintain the discipline of the nodes. It is based on the concept of sequencing technique. As the routing protocol, AODV is used in this method and NS-2 is used for simulation environment. The proposed method minimizes the number of collisions in data transfer and increases the throughput along the network. The performance of the proposed method is evaluated under various conditions, and the obtained results are very promising. Also the proposed scheme shows that the energy requirements are minimum due to the limitation on the number of transmissions while reducing collisions in the MAC layer.