TCP Simulation Evaluations over Ad Hoc Wireless Networks(9)

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

Energy Spent (joule *e-7/bits) Energy spent vs. Paket Size (1 flows / 5% error) 32 28 24 20 16 12 0 200 400 600 800 1000 1200 1400 1600Paket Size (bytes)NewReno Sack NewReno DASack DA

(a)1 owEnergy Spent (joule *e-7/bits) Energy spent vs. Paket Size (10 flows/ 5% error) 32 28 24 20 16 12 0 200 400 600 800 1000 1200 1400 1600Paket Size (bytes)NewReno Sack NewReno DASack DA

(b)10 ows

Fig.4.EnergyConsumptionwithPacketErrorRateof5%

http://www.77cn.com.cnparingFigs.4(a)and4(b)onecansaythatforsmallpacketsizesTCPNewrenooutperformedTCPSACKforthescenariowithone ow.Theoppositehappenedfortheten owscase.Forlargepacketsizeswedidnotnoticeanydifferencebetweenthetwo avours.Inshort,theonlyeffectiveconclusionfromtheseresultsisthatDAishelpfullforenergyconsumptionbene ts,evenfornoisyenvironments.

C.Retransmissions

Theideahereistoobservethetypicalbehavioroftheretransmissionsintheadhocnetworks.Forthat,wesimulated owswithpacketsizeof250,500,1000,and1460bytes.

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