资源描述：
《wcdma无线协议介绍)（IntroductionofWCDMAwirelessprotocol）》由会员上传分享，免费在线阅读，更多相关内容在工程资料-天天文库。
1、wcdma无线协议介绍)(IntroductionofWCDMAwirelessprotocol)IntroductionofWCDMAwirelessprotocolThewirelessaccesstechnologyofWCDMAismainlyembodiedinthedesignofwirelessinterface・Therefore,thisarticlemainlyintroduceseachprotocolofwirelessinterface・TheWCDMAradiointerfacereferstot
2、heinterfacebetweentheuserequipment(UE)andtheUMTSterrestrialradioaccessnetwork(UTRAN),oftenreferredtoastheairinterface,orUu(UE-UTRAN)interface・Theuserdeviceisconnectedtothefixednetworkportionofthesystemviaawirelessinterface・ThewirelessinterfaceofWCDMAisthemostimport
3、antopeninterfaceofUMTS,anditisalsothekeyofWCDMAtechnology.Itinvolvesmanykeytechnologies・Theso-calledinterfaceisopen,whichmeansthatthedefinitionoftheinterfaceallowstheterminaldevicesoftheinterfacecanbeproducedbydifferentmanufacturers・Thatis,theterminaldevicesproduce
4、dbythemanufacturercancommunicatewitheachotheraslongasthespecificationoftheinterfaceiscompliedwith.Generallyspeaking,usersofterminalequipmentmanufacturersaremuchmorethannetworkmanufacturers.Therefore,thedevelopmentofanopenwirelessinterfacefacilitatescompatibilitybet
5、weendifferentmanufacturers，products・Ofcourse,forproductsusingdifferentwirelesstransmissiontechnologies,thereisnocompatibility・TherearesomedifferencesbetweenthewirelessinterfacesofWCDMAFDDandWCDMATDD.HerewemainlyintroducethewirelessinterfaceofWCDMAFDD.Accordingtothe
6、protocolspecificationof3GPP,thewirelessinterfaceprotocollayerofWCDMAisdividedintothreelayers・Thebottomlayeristhephysicallayer,andtheprotocollayeronthephysicallayer(LI)iscalledthedatalinklayer(L2)andthenetworklayer(L3)・IntheUTRAFDDwirelessinterface,thedatalinklayeri
7、sdividedintoseveralsublayers・Inthecontrolplane,thedatalinklayer(L2)containstwosublayers:mediaaccesscontrol(MAC)protocolandradiolinkcontrol(RLC)protocol;intheuserplane,inadditiontoMACandRLC,therearetworelatedbusinessspecificprotocol:packetdataconvergenceprotocol(PDC
8、P)andradio/multicastcontrolprotocol(BMC)・Thenetworklayer(L3)bytheradioresourcecontrol(RRC)andnonaccesslayerprotocolofcallcontrol,mobilitymanageme
