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Cross-layer based Smart Acknowledgment Scheme for TCP in MANETs


D.Sunitha, A. Nagaraju, G.Narsimha


Vol. 16  No. 7  pp. 124-130


TCP upon wireless network is most challenging issue because of random losses and ACK interference. Also, TCP suffers from performance declination in terms of creating delay and overhead in network because of poor characteristics of wireless channel. In order to overcome these issues, we proposed a smart acknowledgment distribute channel access (SADCA) scheme for TCP in MANET. In the proposed scheme first a separate access category for TCP acknowledgment packets is used without any data and then it is assigned with highest priority. In this way, delay during transmission of packet can be reduced and also packet can be acknowledged immediately. Also, to increase the performance delay window size can be adjusted for optimization purpose by considering the parameters such as transmission rate, number of hops, and channel occupied ratio (COR). Hence the proposed scheme helps to avoid any kind of delay and overhead for sending TCP acknowledgment.


Cross layer, TCP, MAC, TCP smart acknowledgment, MANET