Explicit Throughput and Buffer Notification based Congestion Control: A Cross Layer Approach

Congestion is a major issue in both wired and wireless communication system. Many techniques are applied in data link, network, and transport layer to control congestion. Out of which, flow control plays an important role in controlling the congestion. Again, several techniques are also used to control flows, i.e., AIMD, AISD, MIMD, etc. Still, packet drop occurs at the intermediate nodes due to buffer overwhelming. In this paper, we propose Explicit Throughput and Buffer Notification (ETBN) based congestion control mechanism by regulating the flow rate at the sender side. In this proposed approach, the receiver sends two notifications explicitly regarding its status in terms throughput and buffer availability using cross layer approach. The proposed model is simulated extensively using a self simulator and found that it shows better performance in terms of throughput, buffer utilization when compared with AIMD approach.