VoIP与WLAN结合实现移动IP电话的研究

华中科技大学硕士学位论文VoIP与WLAN结合实现移动IP电话的研究姓名：管玲玲申请学位级别：硕士专业：通信与信息系统指导教师：王宏远20070131IVoIPWLANVoIPWLANVoIPInternetWLANIEEE802.11,VoIPQoSWLANIPISPVoIPWLANIPWiFiVoIPPCtoPCPhonetoPhoneWiFiVoIPIPInternetPSTNInternetVoIPWiFiIIAbstractThisthesismainlydiscussesthesystemdesignandrealizationwhichusingVoIPmixedwithWLANtechnique.Itcarriesonresearchfromthesystemstructure,networklayer,commuicationprotocol,relatedaudioencode/decodetecnnology,aswellasthefunctionrealizationandqualityassuranceofeachmodule.VoIPandWLANtechniquesdevelopquicklyintherecentyears.VoIPdeliversdatathroughtheInternettocutdownthephonecost.WLANtransportsdataformtheair,simplifyingtheconstructionofnetwork.ThisthesissimplyintroducestheVoIPandWLANrelavanttechniqueandstandards,containingaudiotechnology,theseriesstandardofIEEE802.11,etc.Andmainlygivesdetailexplanationofthetwokeytechniques:QoSofVoIPandthesecuritytransmissionofWLAN.ThisthesisemphasizesonthedesignoftheterminalequipmentofmobileIPphonesystem,thatistheWiFiphone,underthemodeofISP.ItdescribestheWiFiphonefromthenetworkstructure,logicdesign,frameworkofthekeyequipment,modelrealizationtotheequipmentfunctionindetail.Also,itdoesalotoftestworkwiththeWiFiphone,suchasthefunctiontest,theguidelineanalyze,forthepurposeofverifyingthepossibilityoftheproject.Inourcountry,theVoIPapplicationrestrictstoPCtoPC.ThereisnoPhonetoPhoneISPatpresent.Accordingtothis,thisthesissuggestsamethodofcarryingoutmobileIPphonesystemattheenterprizelevel,basingontherealizationoftheWiFiPhone,andusingtheVoIPaudiogatewayproduct.Makeuseoftheoriginalresourceoftheenterprize,combineinternetwiththetraditionalPSTNnet,astodelieverdatafreelybetweenthetwonets,improvetheutilizationofinternet,optimizetheresourceconfiguration.Astheresultofthismethod,theenterprizecouldreduceit’scostonthelong-waytelephonecalls.KeyWords:VoIPWiFiWLANQoSWLANSecurityVVoIPVoiceoverInternetProtocolIPWLANWirelessLocal-areaNetworkPSTNPublicSwitchedTelephoneNetworkWiFiWirelessFidelityAPAccessPointGKGateKeeperSIPSessionInitiationProtocolFECForwardandErrorCorrectionMACMediumAccessControlLLCLogicLinkControlDSSSDirectSequenceSpreadSpectrumFHSSFrequencyHoppingSpreadSpectrumBSSBasicServiceSetDSDistributionSystemESSExtendedServiceSetWEPWiredEquivalentPrivacyWPAWi-FiProtectedAccessWi-FiRSNRobustSecurityNetworkTKIPTemporalKeyIntegrityProtocolRSVPResourceReservationProtocolRTP/RTCPReal-timeTransportProtocol/Real-timeTransportControlProtocol/CSMA/CACarrierSenseMulti-Access/CollisionAvoidanceI,::200722:_______:200722:200722111.1IPIPVoIPWLANWLANVoIPIPVoIPIPIPIPIP[1]WLANWLANIEEE802.11WLANIEEE802.11bITVoIPWLANVoIPPSTNInternetWLANIP1.2IP1.2.1IPPSTNIP[2]2InternetInternetVoIP1995VocalTecIPInternetPhonePCPCIP[3]1996VocalTecDialogicInternetPSTNIPIPPCPCtoPhonePhonetoPCPhonetoPhoneInternetIP[3][4]IP3PCIPIPIPIPIPPSTNInternetIP12kb/s64kb/s3,64kbit/sIP[5]71111IP3510[6]IPIPVoIPVoIPISPMSNSkypeVonageSkypeVoIPVoIPVonagePhonetoPhoneTencentRedVIPPCtoPCVoIP2006SkypeYahoo!BBVoIP1.2.2WLANWLANAPPCIEEE802.11WLAN1.42.WLAN3.4.WLAN5.WLAN54Mb/sTlE1WLAN6.802.11b1007.802.11b11Mb/s8.APAPAPWLANAPAPWLANWLAN[7]5WiFiIEEE802.11b2.4GHz11Mb/sWLANWLANWPA3:1SSIDAPSSIDAP2MAC3WEP1.2.3VoIPWLANIPVoIPGSMVoIPWLANVoIPWLANIPVoWLANVoIPWLANWLANVoIPISPVoIPVoIPVonagePhonetoPhoneVoIPVonageUTStarcomWiFiF1000GSM/WiFiR6006WiFiGSM/WiFiWiFiVoIPVoIPVoIPISPISPWLANVoIPIP[8]InternetVoIPVoIPPSTNLANIPInternetVoIPPSTNVoIPVoIPH.323E1E&MFXOFXSVoIPVoIP1.3IPVoIPVoIPQoSWLAN7WLANIEEE802.11WLANIPISPVoIPWLANVoIP&WLANIPISPVoIPWiFiVoIPIP82VoIP2.1VoIP2.1.1VoIPIPTCP/IPInternet[9]IP2.1MCUInternetVoIPVoIPPSTNPSTN2.1IPIP4MCUGKIPIPIPIP92.1.2VoIPIP[10]IPRTPVoIP2.22.2VoIPGKRASGKH.225.0(GKGK)H.245[11]IPPSTNInternetIP10811kb/s64kbt/sIP58H.323MGCPSIPH.323IPSIPH.323ITU-TH.323PBNPacketBasedNetworksIPH.323[12]H.323H.323NetMeetingIntelInternetVideoPhoneWLANSIPSIPH.323H.323H.323H.323IPPSTNMGCPH.323SIPIETFSIPSIPInternetSIPOSISIPUDPTCPSIPSIPH.32311SIPURLWebH.323SIPMGCPMGCPH.323SIPIPMGCPIPH.323SIPMGCP2.2VoIP2.2.1VoIPPSTNIPVoIPVoIPIPIPVoIP100ms100250ms400ms12[13]IPIPISDNTCL45dBIPPSTNIPIP2.2.2VoIPVoIP32kb/sADPCM64kb/sPCMIP6kb/sCSACELP46kb/s25l1.5kb/s[14]IP2.2.2.1ITUG.729G.7298kbit/sG.72432kbit/sG.729CS-ACELPConjugateStructured-AlgebraicCodeExcitedLinearPredictivePCM10ms10ByteG.729G.723/G.726.12.2.2.2IP13IP512kb/sIPIPRSVPIP2.2.2.33640[15].2.2.2.4PBXPBX10ms[16]IPIP4050ms2.2.2.5IPIP14IPIP200ms[17]2.2.2.6FECIP//IP/IPInternetFECFECIntra-PacketExtra-Packet[18]FEC1020FEC30FEC2.2.3VoIP2.1152.1VoIPCodeckbpsG.711PCM64G.726ADPCM40/32/24(8MIPS)(40kbps)(16kbps)G.729CS-ACELP8(30MIPS)G.729aCA-ACELP8G.723MP-MLQ6.3/5.3(20MIPS)(6.3kbps)(5.3kbps)G.723.1MP-MLQ6.43/5.3(40MIPS)G.728LD-CELP16UsDodLPC-102.4GSMRAE-LPT2.3QoS2.3.1QoSQoSQoSIP2.22.2QoSTelnetQoS16InternetQoSQoSQoSQoS3[19]QoSInternetQoSIPQoSQoSIPQoSQoSIPVoIPQoSQoSQoSInternet2.3.2QoSQoS3QoS[20]QoSIP17QoSQoSIPIPToSQoSIPv4ToSIPv6TrafficClassIP[21]RSVPIPToSQoSQoSIPQoSTCP/IPQoSIPCisco700012000BayBackboneNodeQoSATMQoSATMCisco1200064Byte18QoSAppleTalk2.3.3QoSQoSQoS[22]QoSInternet(IETF)QoSIntServDiffServ2.32.3InternetQoSIP(VoIP)(FTP)(E-mail)/(VPN)IntServQoS()RSVP(DS