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标题:
在IMS系统中集成不同无线接入网络-101P-EN-200810
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时间:
2010-4-16 19:17
作者:
wererer
标题:
在IMS系统中集成不同无线接入网络-101P-EN-200810
NextgenerationheterogeneouswirelessnetworksareexpectedtointerworkwithInternetProtocol
(IP)-basedinfrastructures.Conventionalnetworkservicesoperatelikesilosinthataspeci cset
ofservicesareo eredoveraspeci ctypeofaccessnetwork.Asaccessnetworksevolvetoprovide
IP-basedpacketaccess,itbecomesattractivetobreaktheseservicesilosbyo eringaconverged
setofIP-basedservicestouserswhomayaccesstheseservicesusinganumberofalternative
accessnetworks.Thistrendhasstartedwiththirdgenerationcellularmobilenetworks,which
havestandardizedontheuseoftheIPMultimediaSubsystem(IMS)tomanageuseraccessto
awidevarietyofmultimediaservicesoverthemobileInternet,whilefacilitatinginterworkingof
heterogeneouswirelessandlandlineaccessnetworks.
ThefutureusersofcommunicationsystemswillsubscribetobothIP-basedandCircuitSwitched
(CS)basedservicesandintheforeseeablefutureasingledatabasethathandlesuserpro lesacross
alldomainswillberequired.HomeSubscriberServer(HSS)asanevolvedversionofHomeLocation
Register(HLR)isoneofthekeycomponentsofIMS.IndeployingHSSasacentralrepository
database,inafullyoverlappedheterogeneousnetworksetting,changesofaccessmodearevery
frequentandconveyingthisinformationtoHSSimposesexcessivesignalingloadanddelay.In
ourproposedschemeweintroduceanInterfaceAgent(IA)foreachlocationareathatcachesthe
locationandinformationabouttheaccessmodethroughwhichausercanbereached.Thismethod
resultsinsigni cantamountofsavingsinsignalingcostandbetterdelayperformance.
Theexistingcalldeliveryapproachesincellularnetworksmaynotbewellsuitedforfuture
communicationsystemsbecausetheysu erfromunnecessaryusageofnetworkresourcesforcall
attemptsthatmayfailwhichaddstoexcessivesignalingdelaysandqueuingcosts.Reducingthe
numberofqueriesandretrievalsfromthedatabasewillhaveasigni cantimpactonthenetwork
performance.WepresentanewschemebasedonReverseVirtualCallsetup(RVC)asasolution
tothecalldeliveryprobleminheterogeneouswirelessnetworksandevaluatetheperformanceof
thisframework.
时间:
2010-7-14 13:55
作者:
crbhappy
据说我们这要上设备了，谢谢哦
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