A Novel Call Admission Control Algorithm for Next Generation Wireless Mobile Communication

Wireless communication technology is progressing very vastly. With this change in technology customerservicesformultimediaandnon-multimediaareincreasingdaybyday.Butduetolimited resourcesofthewirelessnetwork,weneedtodesignanefficientCACalgorithmtoenhanceQoS levelsforendusers.TheQualityofservice(QoS)enhancementinthewirelessnetworkisrelatedto makinganefficientuseofcurrentnetworkresourcesandtheoptimizationoftheusers.Callacceptance inCACisoneofthechallengeinmobilecellularnetworkstoensurethattheacceptanceofanew callintoaresourcelimitedwirelessnetworkshouldnotdeviatetheservicelevelAgreement(SLAs) atthetimeofconversations.Inthenextgenerationwirelessnetwork,CAChasthedirectimpacton QoSforusercalls&overallsystemperformance.Tohandlehandoffcallsandnewcallsincellular networkchannelreservationschemehavebeenalreadyproposedtoreservesystembandwidthfor higherprioritycallforCAC.Thisearlierproposedschemeisnotaspertherequiredlevelofsatisfaction becausetheavailablereversedbandwidthisnotallocatedproperlyincaseofleasthandoffrate.In this,theauthorsliketopresentanewchannelborrowingschemewherenewnonrealtime(NRT) callscanmakeuseofreservedchannels.Itcanborrowthisreservedchannelonatemporarybasis andafterthisimmediatelyifanyhandoffcallentersthecurrentcellandnoanyotherchannelsare available,thenitwillpre-emptthechannelfromanearlierborrowedNRTuserifexists.ThispreemptedNRTcalliskeptinthepriorityqueuetoconsideritsservicewhenanychannelbecomesfree. ThenumberofNRTcallsinthequeueshouldnotbelargetoavoiddelayedservice.Thefundamental objectiveoftheproposedschemetodesignofthesystemforevaluatingtheresultsandcomparing withtheresultsoftheexistingsystem.Fromtheresultsofcurrentresearchwork,itisobservedthat proposedschemedecreasescalldroppingprobabilitywhichincreaseslightlyincallblockingrate overhigh-densityhandoffcallrate. KeyWoRDS Bandwidth Reservation, Call Admission Control, Channel Borrowing Method, Handoff Calls, Non Real Time Calls, Real Time Calls