TCP Simulation Evaluations over Ad Hoc Wireless Networks(13)

The Transmission Control Protocol (TCP) represents the most deployed transport protocol used in the Internet so far. This popularity motivates its presence in wireless networks, including ad hoc networks. These networks are very promising since they make i

mainlyforlargepacketsizes,sinceitsreceiverprovidesbetterinformationtothesenderaboutlosses.ThatwasobservedforthelargestpacketsizeinFigs.7,8,8(a)butnotinFig.8(b).However,thistendencywasnotobservedforthesmallerpacketsizes.

Retransmissions vs. Paket Size (10 flows / 5% )

900NewReno 800Sack NewReno DA 700Sack DA 600

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0 0 200 400 600 800 1000 1200 1400 1600

Paket Size (bytes)Number of Retransmissions

(a)10 ows2hops

Number of Retransmission Retransmissions vs. Paket Size (10 flows / 5% ) 800NewReno 700Sack NewReno DA 600Sack DA 500 400 300 200 100 0 0 200 400 600 800 1000 1200 1400 1600

Paket Size (bytes)

(b)10 ows5hops

Fig.8.Aggregatenumberofretransmissionsfor10 owswithpacketerrorrate5%

E.Throughput

Inthissection,weinvestigatethebandwidthutilisationnotonlywithdifferentnumberofhopsbutalsodifferentnumberofconcurrent owsinthechaintopologyofFig.2.The

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