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WCDMA/UMTS 第三代無線通訊系統 Core Network 架構介紹﹝1﹞

1888 GSM/GPRS2 Mbits/sec384 Kbits/sec144 Kbits/sec 1Core Network 2GSMGPRSGSMGPRS Radio Access Network 3WCDMA/UMTS WCDMA/UMTS Radio Access Network 4Service and Security 5Terminal Equipment Core NetworkPSTNIntranetCore NetworkCore NetworkCore Network Core NetworkCore Network GSM/GPRSWCDMA/UMTS 3GPPCore Network Radio Network 3GGPRSGeneral Packet Radio Service2.5GGSMGlobal System for Mobile Communication2GAMPSAdvance Mobile Phone System1G 3GPP3Ghttp://www.3gpp.org GSMGPRSWCDMA Core Netwok GSMGlobal System for Mobile CommunicationCDMACode Division Multiple AccessPDCPersonal Digital Cellular GSMFDMA + TDMA CDMACode Division Multiple AccessQualcommIS-95CDMAIS-41cdmaOneIS-95CDMAcdmaOneCDMA3G PDCNTTTDMA GSMGSMWAPWireless Application ProtocolGSMGSMWAPWAPGSM9.6Kbits/sec GSMWAP GSMCircuit-Switch PSTNCircuit-Switch GSM GSM GSMMSMobile StationBTSBase Transceiving StationMSBTSRadio InterfaceUmBTSBSCISDN (Interated Servicer for Digital Network)BSCBTS GSMCore NetworkBSCMSCASS7SignalingACDEFGSignalingGSMSS7Signaling System #7T1E1T124E131 MSCBSCMSCPCMET1/E1GMSCGMSCPSTN GSM PLMNPSTNMSCGMSC MSCGMSC User BUser EGSM PLMN 2User BUser EUser BUser CellBTSBSCMSCMSCUser EBSCUser ECellBTSUser BUser E User AUser EGSMPLMN 1PLMN 2User AUser EGSMGMSC PSTNUser FUser AGMSCPSTNUser AUser F PSTN :HLRVLR GSMSS7Signaling System 7Out-of-BandOut-of-Band Out-of-BandSS7 Signaling TrafficSS7ABUser Traffic Out-of-BandIn-of-Band? […]

Linux上的核心訊息紀錄機制解析

sys_get_kernel_syms “struct kernel_sym *table”,User-ModeSystem Call,table0,table0,for for (mod = module_list, i = 0; […]

Providing Seamless Roaming Service for Mobile Host with Multiple Communication Devices

Table 2 Processing overhead introduced by the proposed adaptive communication system Ethernet (IEEE 802.3) IP datagram receiving (without adaptive communication system) 5.509 Mb/sec IP datagram receiving (with adaptive communication system) 5.308 Mb/sec Percentage of receiving overhead (%) 3.65 IP datagram transmission (without adaptive communication system) 8.776 Mb/sec IP datagram transmission (with adaptive communication system) 8.424 Mb/sec Percentage of transmission overhead (%) 4.001 Figure 6 Snapshoot of the active device controller (I) Figure 7 Snapshoot of the active device controller (II) Figure 8 Snapshoot of the active device controller (III) 5. […]

Windows NT保護子系統

() SUBSYSTEM()Windows NT(POPUP MENU) \WINNT\SYSTEM32\*.SYSNTDevice DriverSYSSubsystemImage doesnt require a subsystem()Win32 GUI()Win32 Console Mode () () () Inside NT Second Edition Creating Process()EXE.Windows NT Executive Process Object Inside Windows NT Second EditionHint(()()()) () ()NT (1)CMD.EXE:*.BATDOS Command(:DIR..etc)CMD.EXEAUTOEXEC.BATDOS BOX?NTDOS BOXCMD.EXECMD.EXEDOS BOXCMD.EXEDOSCOMMAND.COMCOMMAND INTERPRETER (2)NTVDM.EXE:DOS BOXDOSNTVDM.EXEDOSDOSNTVDM.EXEDOS DOSWin16 NTVDM.EXEWin16 (3)Win 32Windows NTWin32POSIXOS/2 () ()EXE DLL Services.exe Service Controller Process Winlogon.exe Logon Process Smss.exe Session Manager Process Psxss.exe POSIX Subsystem Process OS2ss.exe OS/2 Subsystem Process Csrss.exe Win32 Subsystem Process Ntdll.dll Internal Support Functions and System Service Dispatch stubs to Executive Functions Kernel32.dll Win32 Subsystem DLLs User32.dll GDI32.dll Psxdll.dll POSIX Subsystem DLL NTOSKRNL.EXE Executive and Kernel Hal.dll Hardware Abstraction Layer Win32k.sys Win32 User and GDI Kernel-mode Components () Win32 Windows NTWin32Win324Process Process PID Pri System 0x02 8 Smss 0x19 B Csrss 0x21 D Idle 0x00 0 Win32Windows NTWin32CSRSS.EXE? […]