2001/12/14Prof. Huei-Wen Ferng 1 Chapter 6 Advanced Mobile Phone System (AMPS)
2001/11/23 Prof. Huei-Wen Ferng 1 Chapter 4 Wireless LAN Technologies and Products.
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Transcript of 2001/11/23 Prof. Huei-Wen Ferng 1 Chapter 4 Wireless LAN Technologies and Products.
2001/11/232001/11/23 Prof. Huei-Wen FerngProf. Huei-Wen Ferng 11
Chapter 4Chapter 4
Wireless LAN Technologies and Wireless LAN Technologies and ProductsProducts
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Wireless LAN ProductsWireless LAN Products
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Choosing a WLANChoosing a WLAN
What are the applications? Is mobility required?What are the applications? Is mobility required? What level of performance is acceptable?What level of performance is acceptable? Will infrared satisfy the needs?Will infrared satisfy the needs? To what backbone networks do we need to To what backbone networks do we need to
connect?connect? With what network OS do we need to work?With what network OS do we need to work? Is it secure?Is it secure? How easy is it to install? To use? To manage?How easy is it to install? To use? To manage? How much does it cost? ($500)How much does it cost? ($500)
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Current ApplicationsCurrent Applications
Wire replacement applicationsWire replacement applications Mobile computing applicationsMobile computing applications
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Lucent WaveLANLucent WaveLAN
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Product LineProduct Line
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Network TopologyNetwork Topology
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Components of APComponents of AP
A wireless LAN adaptor to communicate A wireless LAN adaptor to communicate with the wireless nodeswith the wireless nodes
A wired adaptor to communicate over the A wired adaptor to communicate over the backbonebackbone
MAC layer bridging software to filter traffic MAC layer bridging software to filter traffic from the backbone to the wireless subnetfrom the backbone to the wireless subnet
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System Engineering Spec.System Engineering Spec.
The radioThe radio 902-928 MHz ISM 902-928 MHz ISM
bandband 2.4-2.483 GHz ISM 2.4-2.483 GHz ISM
bandband 250 mw power output 250 mw power output
in 900 MHz band, 100 in 900 MHz band, 100 mw in the 2.4 GHz mw in the 2.4 GHz bandband
MACMAC CSMA/CACSMA/CA
ModulationModulation DSSSDSSS DQPSKDQPSK
Protocols supportedProtocols supported Novell NetWare 2.x Novell NetWare 2.x
and 3.xand 3.x TCP/IPTCP/IP LAN mangerLAN manger Windows for Windows for
workgroupsworkgroups Banyan VINESBanyan VINES
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AP’s FunctionsAP’s Functions
MAC layer transparent bridge (IEEE 802.1D)MAC layer transparent bridge (IEEE 802.1D) Filtering/forwardingFiltering/forwarding Automatic learning and agingAutomatic learning and aging Spanning tree algorithmSpanning tree algorithm SNMP managementSNMP management Radio path diagnosticsRadio path diagnostics Access controlAccess control Net IDNet ID
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Supported PHY Types of EthernetSupported PHY Types of Ethernet
10BaseT10BaseTTwisted pair EthernetTwisted pair Ethernet
10Base210Base2Thin wire EthernetThin wire Ethernet
10Base510Base5Thick wire EthernetThick wire Ethernet
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DEC DEC
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Product LineProduct Line
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Protocols SupportedProtocols Supported
Pathworks V4.1Pathworks V4.1Novell NetWare 2.x and 3.xNovell NetWare 2.x and 3.xTCP/IPTCP/IPLAN managerLAN managerWindows for workgroupsWindows for workgroupsBanyan VINESBanyan VINES
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Products in the WorldProducts in the World
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ProductsProducts
DECtransporter for the MS-DOS/MS-WindowsDECtransporter for the MS-DOS/MS-Windows A TCP/IP packageA TCP/IP package Enables cellular connection with appropriate modem, Enables cellular connection with appropriate modem,
or a wired connection with appropriate modemor a wired connection with appropriate modem
DECtransporter for OpenVMS VAXDECtransporter for OpenVMS VAX A TCP/IP to packet radio network gatewayA TCP/IP to packet radio network gateway Enables connection to a private network over a public Enables connection to a private network over a public
packet radio network such as Mobitex or ARDISpacket radio network such as Mobitex or ARDIS
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Remote Connectivity ConfigurationRemote Connectivity Configuration
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Solectek AIRLANSolectek AIRLAN
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Protocols SupportedProtocols Supported
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Proxim RangeLAN 2Proxim RangeLAN 2
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Product LineProduct Line
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Network TopologyNetwork Topology
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System TechnologySystem Technology
FHSSFHSS2.4-2.483 GHz ISM band2.4-2.483 GHz ISM band15 independent channels15 independent channelsCSMA/CACSMA/CA100 mw transmitted power100 mw transmitted powerGaAs semiconductorGaAs semiconductorPower from computer’s internal batteryPower from computer’s internal battery
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AP’s CapabilitiesAP’s Capabilities
MAC layer bridgeMAC layer bridge Spanning tree protocolSpanning tree protocol Roaming from one bridge to anotherRoaming from one bridge to another Transparent to all EthernetsTransparent to all Ethernets SNMP agent providedSNMP agent provided Diverse protocols supportedDiverse protocols supported
Novell NetWare 2.x, 3.x, 4.x, LiteNovell NetWare 2.x, 3.x, 4.x, Lite LAN managerLAN manager Windows for WorkgroupsWindows for Workgroups
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ISA EquipmentISA Equipment
Interface cardInterface cardAntennaAntennaSoftwareSoftwareManualManual
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InstallationInstallation
HardwareHardware Confirm default setting Confirm default setting
on cardon card Install card in Install card in
computercomputer Screw antenna onto Screw antenna onto
connector in back of connector in back of cardcard
SoftwareSoftware Copy configured Copy configured
IPX.COM driver to IPX.COM driver to hard diskhard disk
Load the IPX driver Load the IPX driver and DOS shell, NETXand DOS shell, NETX
Copy the LOGIN.EXE Copy the LOGIN.EXE filefile
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Xircom NetwaveXircom Netwave
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Product LineProduct Line
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TechnologyTechnology
FHSSFHSS50 mw power output50 mw power output2.4-2.483 GHz ISM band2.4-2.483 GHz ISM bandHop every 0.1sHop every 0.1sSynchronized systemSynchronized system
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Network TopologyNetwork Topology
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Two Kinds of Ad Hoc NetsTwo Kinds of Ad Hoc Nets
Public hoc networksPublic hoc networksAnyone in range can join a public ad hoc Anyone in range can join a public ad hoc
networknetworkNamed ad hoc networksNamed ad hoc networks
One station must start a named networkOne station must start a named networkOther stations join if they specify the nameOther stations join if they specify the name
Optional encryption is availableOptional encryption is available
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IBM Wireless LANIBM Wireless LAN
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TechnologyTechnology
FHSS in the 2.4 GHz bandFHSS in the 2.4 GHz band100 mw power output100 mw power outputAntenna receive polarization diversityAntenna receive polarization diversityTDMA MAC layer (FCFS)TDMA MAC layer (FCFS)Ethernet and Token Ring compatibilityEthernet and Token Ring compatibilitySNMP agentSNMP agent
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Administration FunctionAdministration Function
Authentication and privacyAuthentication and privacyUsers are registered with WNA (wireless Users are registered with WNA (wireless
network administrator) and provided secret network administrator) and provided secret keyskeys
Registered stations are authenticated by APRegistered stations are authenticated by APOptional encryption is availableOptional encryption is available
Interference management through change Interference management through change of hopping patternof hopping pattern
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Motorola AltairMotorola Altair
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TechnologyTechnology
Not SSNot SS In the 18 GHz bandIn the 18 GHz bandLow power- 25 mwLow power- 25 mwComprised of a control module (CM) and a Comprised of a control module (CM) and a
user module (UM)user module (UM)8x11.5x3 inches in size8x11.5x3 inches in sizeAntenna internal to moduleAntenna internal to modulePackaging similar for both modulesPackaging similar for both modules
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Network TopologyNetwork Topology
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WindataWindata
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Product LineProduct Line
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The Hub FunctionsThe Hub Functions
Connectivity of transceiversConnectivity of transceiversSynchronizationSynchronizationAccess securityAccess securityPower controlPower controlNetwork managementNetwork management
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SNMP FunctionsSNMP Functions
Enabling and disabling transceiversEnabling and disabling transceiversAdding and deleting access to stationsAdding and deleting access to stationsMonitoring performanceMonitoring performanceChecking status of radio linkChecking status of radio link
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Network TopologyNetwork Topology
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RadioLANRadioLAN
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Product LineProduct Line
ISA cardISA cardParallel port versionParallel port versionRadioLAN/10 Access UnitRadioLAN/10 Access UnitRadio transceiverRadio transceiverBase stationBase station
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OS and Driver SupportOS and Driver Support
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PhotonicsPhotonics
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Product Line (for PC)Product Line (for PC)
PCMCIA II cardPCMCIA II card ISA cardISA cardCollaborative parallel optionCollaborative parallel optionAPAPExternal transceiverExternal transceiver
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IR TransceiverIR Transceiver
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Diffuse IRDiffuse IR
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Network TopologyNetwork Topology
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SpectrixSpectrix
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Network TopologyNetwork Topology
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Network Block DiagramNetwork Block Diagram
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InfraLANInfraLAN
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Directed IR TransceiverDirected IR Transceiver
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Network Topology (Token Ring)Network Topology (Token Ring)
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Network Topology (Ethernet PTP)Network Topology (Ethernet PTP)
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Network Topology (Ethernet Hub)Network Topology (Ethernet Hub)
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Comparisons (Mobile)Comparisons (Mobile)
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Comparisons (Wire Replacement)Comparisons (Wire Replacement)
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ReferencesReferences
Rifaat A. Dayem, Mobile Data & Wireless Rifaat A. Dayem, Mobile Data & Wireless LAN Technologies, Chapter 7.LAN Technologies, Chapter 7.