gsm global system for mobile communication powerpoint
GSM Global System for Mobiles
... (900)35351241010452x7.22x7.22x25460.4-467.6488.8-496869-894450.4-457.6 478.8-486 824-849 GSM 450 GSM 480 GSM 850DuplexchannelsDuplexSpacingBandDownlinkUplinkGSM systems GSM TimeDivisionMultiplex Frame and Physical ChannelsTS ... time-slotsBTS sideMSs sideBTSTDMA Frame (4.615 ms)3TOPICS• GSM CONCEPTS• GSM SYSTEM ARCHITECTURE• IDENTITIES USED IN GSM • GSM CHANNELS• GSM RADIO LINK• MOBILITY MANAGEMENT• CALL MANAGEMENT• ... messages• International Mobile Equipment Identifier (IMEI)38 GSM ArchitectureHLRVLREIRAUCMSCBSCBSCSMSCPSTNVMSC Mobile Station GSM Air interfaceOMCRTRAUBase Station System Network and...
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Sprite: A Simple, Cheat-Proof, Credit-Based System for Mobile Ad-Hoc Networks potx
... bandwidth and storage requirement.B. System performance vs. network resourceWe next evaluate the performance of our system. One majormetric of the performance of our system is the message successrate, ... Sprite, a simple, cheat-proof, credit-based system for stimulating cooperation among selfish nodes in mobile ad hoc networks. Our system provides incentive for mobile nodes to cooperate and report actions ... discussed in Sec-tion III, although our system provides incentive for cooperationby giving more credit for forwarding a message, whether ornot to forward a specific message will depend on the...
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Mobile Communication System Evolution
... cellular mobile, but also cordless, public mobile radio, satellite and wireless-local area network (W-LAN) solutions. 2G systems are synonymous with the globalisation of mobile systems, and in Mobile ... the 51-frame formats are combined to form a GSM superframe, and the TDMA hierarchy is complete when 2048 superframes are combined toform a hyperframe [WAL-99]. Mobile Satellite Communication ... of3GPP.3GPP was formed in 1998 with the aim of providing globally applicable technical speci-fications for a 3G mobile system. These specifications are based on an evolved GSM CN andthe UTRA...
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Mobile Communication System Evolution
... Station Control GSM Global System for Mobile CommunicationsGSN GPRS Support NodeGSO Geostationary OrbitGTP GPRS Tunnelling ProtocolGTS Gateway Transceiver SubsystemGWS Gateway SubsystemHALE ... Line-of-SightLS Location ServerMAHO Mobile Assisted HOMAP Mobile Application PartMAP Maximum a PosterioriMBCF Mobile BCFMCC Mobile Country CodeMCF Mobile Control FunctionMCHO Mobile Controlled HOMCPC ... Mobile Satellite Communication Networks346MIPv6 Mobile IP Version 6MM Mobility ManagementMNC Mobile Network CodeMoU Memorandum of UnderstandingMS Mobile StationMSAS...
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iCare: A Mobile Health Monitoring System for the Elderly pptx
... personal health information system and the medical guidance. 1) Personal health information system: The personal health system can store physiological data and other information in the database ... receives advice and threshold information from doctors in the form of SMS via GSM. Especially, data receiving module contains data-formatted function that formats data and classifies them ... Our system is also a mobile health system for the elderly with tailored services depending on their personal health condition. However, it is not only a remote and real-time monitoring system...
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Báo cáo hóa học: " A fast iterative localized re-authentication protocol for UMTS-WLAN heterogeneous mobile communication networks" pot
... re-authentication in GSM- WLAN heterogeneous mobile communication networks [27-30] to 3G/UMTS-WLAN heterogeneous mobile communication networks. Furthermore, theAVD function in the RADIUS is responsible for theexecution ... hand,WLAN mobile communication systems offer high datarates with low mobility over smaller areas.Because the heterogeneous mobile communication network requires a high r eliability for acc ess ... network for heterogeneous mobile communication networks become the major goal in thenext generation wireless and mobile communication networks. The heterogeneous mobile communication network aims...
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Báo cáo hóa học: " An efficient and secure anonymous authentication scheme for mobile satellite communication systems" doc
... telecom-munication systems are connected together via the satel-lite communication model to provide diversified communication services, thus forming the so-called mobile satellite communication system (MSCS for short). ... scheme for mobile satellite communication systems. ACM SIGOPS Oper Syst Rev. 145(2-3),42–47 (2003)15. YF Chang, CC Chang, An efficient authentication protocol for mobile satellite communication systems. ... another authentica-tion scheme for mobile satellite communication system based on secret-key cryptosystems (SKC). The schemereduced the complex computation overhead for mobile users by adopting only...
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báo cáo hóa học:" Research Article Exponential Stability and Global Attractors for a Thermoelastic Bresse System" pdf
... constants for the elastic and thermal material properties.From this seemingly complicated system, very interesting special cases can beobtained. In particular, the isothermal system is exactly the system ... exponential stability for the Timoshenko system, but whenthe wave speeds are different, the Timoshenko system loses the exponential stability. Thisphenomenon has been observed for partially damped ... conditions for exponential stability of linear dynamical systems in Hilbertspaces,” Annals of Differential Equations, vol. 1, no. 1, pp. 43–56, 1985.19 S. Borini and V. Pata, “Uniform attractors for...
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Báo cáo hóa học: "Research Article Alternative Speech Communication System for Persons with Severe Speech Disord" pptx
... laboratory systems used speech recognition for speech training purposes in order to help persons withSSD [22–24].The adaptive system we propose uses speaker-dependentautomatic speech recognition systems ... Speech-Enabled Systems to CorrectDysarthria and SSD4.1. Overall System. Figure 1 shows the system we proposeto recognize and resynthesize both dysarthric speech andspeech affected by SSD. This system ... Selection for Speech Synthesis. The communication system is tailored to each speaker and to the particularities ofhis speech disorder. An efficient alternative communication system must take into account...
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Báo cáo hóa học: " Multilevel LDPC Codes Design for Multimedia Communication CDMA System" docx
... Wireless Communications and Networking 2004:1, 141–148c 2004 Hindawi Publishing CorporationMultilevel LDPC Codes Design for Multimedia Communication CDMA System Jia HouInstitute of Information ... access(CDMA) system, the primary challenge is high-quality andhigh data rate multimedia communication. Normally, the mobile transmission systems deal with various kinds of infor-mation such ... interests are sequences,CDMA mobile communication systems, er-ror coding, and space time signal processing.Yu Yi received his Master’s degree fromthe Institute of Information and Com-munications,...
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Báo cáo hóa học: " A Noise Reduction Preprocessor for Mobile Voice Communication" doc
... Telecommunications System (Phase 2+); Universal Mobile Telecommunications Sys-tem (UMTS); Noise Suppression for the AMR Codec; ServiceDescription, June 2002.[27] ETSI, TR 126 978, V4.0.0: Universal Mobile ... discontinuities are greatly reduced if we use a ta-peredwindowforspectralsynthesisaswellasoneforspectralA Noise Reduction Preprocessor for Mobile Voice Communication 1047xdNoise reductionpreprocessorSpeechencoderTransmissionchannelSpeechdecoderyNoise ... EDk2.(13)In [6], γkis called the a posteriori SNR for bin k, ηkis calledA Noise Reduction Preprocessor for Mobile Voice Communication 1051We therefore turn our attention to the a posteriori SNR,γk,definedin(12)...
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