A Scenario of Mobile Communications in hazardous situations and physical disasters

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A Scenario of Mobile Communications in hazardous situations and physical disasters. by Mr. Alexander Soulahakis Supervisor Prof. Madjid Merabti. Overview. Objectives Scenario Theory GSM Design Decisions 802.11 Wireless Lan SMS without network support Experiment – Phases - PowerPoint PPT Presentation

Text of A Scenario of Mobile Communications in hazardous situations and physical disasters

  • A Scenario of Mobile Communications in hazardous situations and physical disasters byMr. Alexander SoulahakisSupervisorProf. Madjid Merabti

  • OverviewObjectivesScenarioTheory GSMDesign Decisions802.11 Wireless LanSMS without network supportExperiment PhasesConclusions

    PapersStandardsBooksBooks Wireless LanBooks GSMMobile Radio NetworksCaution ProjectTools / Simulator ManualsLiterature Review

  • Objective of the projectThe scope of the project is an alternative way of GSM communications, by proposing Ad hoc networking and 802.11 as a suitable communication mean.Transmit SMS over 802.11Receive SMS on GSM device through 802.11

  • ScenarioSeptember 11th 2002New York WTC attack September 7th 1999Athens Earthquake In both situations mobile communications were not available as the networks were overloaded by 400-500%

  • Scenario

    Normal Network OperationOverloaded Network Operation

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    Subscriber

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  • Scenario

    Normal Network OperationOverloaded Network Operation

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  • Scenario

    Normal Network OperationOverloaded Network Operation

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  • Scenario

    Normal Network OperationOverloaded Network Operation

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    Network

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  • Scenario

    Normal Network OperationOverloaded Network Operation

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  • ScenarioBOOM !!!

    Normal Network OperationOverloaded Network Operation

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  • ScenarioOverload

    CongestionCompanies assume that only a fraction of their Subscribers will call simultaneouslyNormal operationPeak timesOccasionallyGSM Blocks outgoing callsInterrupts incoming callsVERIZON Mobile Cells - Router

    CASESWired Network DestroyedWireless Network DestroyedPartial FailureComplete FailureTechniques for avoiding congestionSectorizationStatistics- Modelling Increase BandwidthCaution AI

    Overloaded Network Operation

    Road

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    Subscriber

  • Theory GSMBasic ModelAuthenticationLocalizationCall HandlingSMS ManagementConnects to PSTNMobile HostCELLPSTN

  • DESIGN DESICIONSGSMTransceiverGSM probes only CELL site Mobile phone cannot communicate direct with other mobile phonesChanging software of the mobile device :

    REPROGRAM GSM DEVICE

    HARDAWARE CHANGES FOR DIRECT COMMUNICATION WITH OTHER MOBILES

    CHANGE BASIC TUNING SYSTEM - MODULATION

    CHANGE BTS SOFTWARE IN ORDER TO COMMUNICATE WITH MOBILES

    CHANE GSM SOFTWARE IN MSC

    STANDIRIZE NEW PROTOCOL

    ALL VENDORS MUST AGREE TO NEW STANDARDOLD MOBILES MUST BE SUBSTITUTED WITH NEW ONES

  • DESIGN DESICIONSBLUETOOTHUp too 8 usersConnection through piconents will be slowRange is 100 -200 metersRooting ?Class 3 - 1 mW (0dBm) with a 'typical range' of 10m Class 2 - 2.5 mW (4dBm) with a 'typical range' of 20m Class 1 - 100 mW (20dBm) with a 'typical range' of 100m Link data rate - a maximum link baseband data rate of 723.2 kb/

  • 802.11 Wireless Lan

  • 802.11 Wireless LanStations can communicate among each other (Ad hoc Mode) or with stations beyond their direct communication range with the support of an infrastructure (Infrastructure Mode). Ad Hoc CapabilitiesSupport InfrastructurePrivacyTransparencyInfrastructure' mode, a communication method that requires a wireless access point. (802.11b)may communicate with each other without a wireless access point 'Ad Hoc' mode

  • 802.11 Wireless LanTwo of the advantages of the standard are the following: It provides privacy of user information The services are compatible with ad hoc and infrastructure service. For current scenario the transfer rate will be used is 1Mbit/second though 802.11 specification allows up to 54Mbits/second. Its frequency bands are 902-928 MHz, 2400-2483.5 MHz and 5725-5850 MHz. A great issue is that a mobile station is able to communicate with any other mobile or wired station transparently, which means that above the MAC layer 802,11 appears like any other 802.x LAN and offers comparable services.

  • 802.11 Wireless LanRangeSpeed BandwidthPower consumption

  • Power ConsumptionAtheros AR5004 chipsets also improve power consumption by 60% over 802.11b chipsets. The chipsets enable a multi-phase approach to signal processing that dramatically extends the battery life of mobile devices. The new design controls the power of different sections of the wireless device according to the level of system and network activity. http://www.atheros.com/pt/index.html

  • SMS without network support

  • Experiment - PhasesPhase 1 Implementation on 802.11 Phase 2 Bridge GSM Device with 802.11

  • Current StatusExperimental PhasePhase 1 Implementation on 802.11 Phase 2 Bridge GSM Device with 802.11Phase 3Testing Decision Libraries Software SimulationEquipment

  • ConclusionsBridge GSM -802.11Send SMS without network support through 802.11 (ad hoc mode)Send FREE SMS through 802.11 to other users

  • The End