A Cross-Layer TCP Protocol with Adaptive Modulation for MANETs

Author

Selvam, A. ; Kathiravan, K. ; Reshmi, R.

Author_Institution

B.S. Abdur Rahman Eng. Coll., Chennai

fYear

2008

fDate

4-6 Jan. 2008

Firstpage

428

Lastpage

433

Abstract

TCP optimization in mobile ad hoc networks is a challenging issue because of some unique characteristics of MANETs. Some of the main reasons behind TCP´s performance degradation in these networks are lossy channels, frequent route failures, network partitions. In this paper, a cross-layer TCP protocol with adaptive modulation for MANET is proposed. Medium access (MAC) layer is responsible to decide the modulation scheme to be used at the physical layer depending on the signal strength and queue length of the receiver. An ns2.30-based simulation analysis of the proposed protocol which provides better TCP performance with minimum congestion than the existing TCP protocols is described. The effects of mobility of nodes, no. of connections on TCP parameters such as throughput, packet delivery ratio and round trip time are investigated.

Keywords

access protocols; ad hoc networks; adaptive modulation; mobile communication; transport protocols; MANET; adaptive modulation; cross layer TCP protocol; medium access layer; mobile ad hoc networks; network partitions; packet delivery ratio; queue length; round trip time; route failure; signal strength; Access protocols; Ad hoc networks; Degradation; Feedback; Mobile ad hoc networks; Mobile communication; Performance loss; Physical layer; TCPIP; Throughput; TCP; adaptive modulation; congestion; data rate; queue length; route failure;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing, Communications and Networking, 2008. ICSCN '08. International Conference on

Conference_Location

Chennai

Print_ISBN

978-1-4244-1924-1

Electronic_ISBN

978-1-4244-1924-1

Type

conf

DOI

10.1109/ICSCN.2008.4447232

Filename

4447232