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RF Networking
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ngTopics
• Wired network components
• Wireless network components
• Host Connectivity
• RF Technologies
• Technical Sales Tips
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ngRF Networking
• In-premise RF LAN
PAN
LAN
WAN
sale
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ngWired Network Components
• Network– LAN
• Architecture– Ethernet
• TCP/IP Protocol– Transmission Control Protocol / Internet Protocol
– A standard procedure for regulating data transmission between computers.
– Uniquely identifies each device on a network
– Used in both Wired / Wireless networks
Ethernet
TCP/IP
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ngWired Network Components
• Host computer– Mainframe (S/390)– Midrange (AS400)– Unix (Sun)– PC (NT Server) Host Computer
Ethernet
Host Computer
sale
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ngWired Network Components
• Client computer– Desktop PC– Laptop PC– Emulation terminal
(dumb terminal)
Ethernet
Host Computer
Client PC
Client PC
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ngWired Network Components
• Software– Networking
• Windows 95,98,NT• Novell• Linux• Etc.
– Application• Power Point• Word• Excel• Access• Internet Browsers• Etc.
sale
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ngWired Network Components
• Ethernet hub– Provides multiple
ports for clients to access the wired Ethernet
Hub
PC PCPCPC
Ethernet
Host Computer
Client PC
Hub
PC PCPCPC
sale
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ngWired Network Components
• Ethernet bridge– Connects Ethernet
segments– Filters traffic by MAC
address
Bridge
EthernetEthernet
Host Computer
Client PC
Hub
PC PCPCPC
Bridge
Client PCClient PC
Host
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ngWired Network Components
• Router– Connects different
Ethernet subnets and or WANs
– Filters traffic by TCP/IP address
Router
Router
EthernetEthernet
Host Computer
Client PC
Hub
PC PCPCPC
Bridge
Client PCClient PC
WAN
sale
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ngComplete Wired Picture
Router
EthernetEthernet
Host Computer
Client PC
Hub
PC PCPCPC
Bridge
Client PCClient PC
WAN
sale
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ngWireless Network Components
• Network– LAN
• Architecture– Ethernet
• TCP/IP Protocol– Transmission Control Protocol / Internet Protocol
– A standard procedure for regulating data transmission between computers.
– Uniquely identifies each device on a network
– Used in both Wired / Wireless networks
Ethernet
TCP/IP
sale
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ngWireless Network Components
• Host computer– Mainframe (S/390)– Midrange (AS400)– Unix (Sun)– PC (NT Server) Host Computer
Ethernet
Host Computer
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ngWireless Network Components
• Wireless Client– RF enabled computer
• Desktop PC• Laptop PC• Pen based PC (Pocket PC, Palm)• Portable data terminal
Ethernet
Host Computer
Client PCPen computer
Laptop
7200
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ngWireless Network Components
• Access point• Provides connectivity for wireless
clients• Connects wireless to wired Ethernet
segments, filters by MAC address• Combination Ethernet bridge and
hub
Client PCPen computer
Laptop
Ethernet
Host Computer
7200
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ngWireless Network Components
• Client Software– Terminal emulation
software• Connect, Inc.
– RF Simplicity• HHP product
– Custom software
Connect TE SoftwareRF Simplicity Software
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ngWireless Network Components
• RF Terminal Controller (Universal Gateway)– Terminal emulation
support for large, complex systems
Client PCPen computer
Laptop
Ethernet
Host Computer
7200
Universal Gateway: Terminal server designed to optimize data flow between RF data collection terminals and host computers as well as enhance the maintenance and support of the wireless network.
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ngSimple Wireless Network
Ethernet
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ngComplex Wireless Network
EthernetEthernet
HostUniversalGateway
WAN
Router Router
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ngHost Connectivity
• Terminal Emulation solutions– Hosts– Thick Client solutions– Thin Client solutions– Thick versus Thin
• RF Simplicity
• Custom application development
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ngHost Connectivity
• Terminal emulations supported:
• DEC VT100 / VT220
• IBM 3270
• IBM 5250
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ngHost Connectivity
• VT100 / VT220 Hosts
• IBM RS6000• HP 9000• DEC Alpha• SUN Solaris• PC running SCO UNIX• PC running LINUX• PC running NT and Telnet Services
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ngHost Connectivity
• IBM 3270 Hosts
• IBM ES9000• IBM S390• IBM AS/400• Bull / Honeywell• Tandem
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ngHost Connectivity
• IBM 5250 Host
• IBM AS/400
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ngHost Connectivity
• Thick Client:– Terminal emulation software resides on the
hand held which communicates directly to the host
– TNVT100/220, TN3270, TN5250• TN = Telnet
– TCP/IP over Ethernet to Host Required– No Universal Gateway required– aka “Direct Connect”
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Ethernet
Host Connectivity
• Typical thick client configuration
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ngHost Connectivity
• Remote thick client configuration
EthernetEthernet
WAN
Router
Router
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ngHost Connectivity
• Thin Client:– Some terminal emulation software resides
on the hand held, the rest resides in the Universal Gateway
– TNVT100/220, TN3270, TN5250• TN = Telnet• TCP/IP over Ethernet
– aka “Server-based connection”
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ngHost Connectivity
• Typical thin client configuration: TN
Ethernet
HostUniversalGateway
sale
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ngHost Connectivity
• Remote thin client configuration: TN
EthernetEthernet
HostUniversalGateway
WAN
Router Router
sale
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ngHost Connectivity
• SNA / SDLC supported
• Special quote!
• Lead time longer with this setup!
• Additional info available upon request
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ngHost Connectivity
• Thick versus Thin Client
• Pros & Cons
• Rules of thumb
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• Thick Client– All terminal
emulation software is located on the RF terminal. The RF terminal communicates directly to the terminal emulation host
• Thin Client– A smaller amount of
software (thin) resides on the RF terminal and the RF terminal communicates to the Universal Gateway. The Universal Gateway then communicates to the terminal emulation host.
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• Thick client pros– Less system cost– Less hardware
• Thick client cons– Difficult to trouble-
shoot remotely– More work to
maintain– No data optimization
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• Thin client pros– Remote dial in for
easier trouble shooting & remote support
– Easier to maintain– Optimizes data over
network
• Thin client cons– More cost– Extra piece of
hardware
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• Thick client rule of thumb:– Less than 15 – 20 terminals single site– Less than 15 – 20 terminals multi site in
close proximity
• Thin client rule of thumb:– Greater than 20 terminals single site– Greater than 20 terminals multi site– Stressed wide area network involved
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ngHost Connectivity
• RF Simplicity– Tool for rapid application development– RF Simplicity takes care of TCP/IP sockets connection– Runs in Visual Basic environment under Windows
95/98/NT, perfect for VB programmers– Best solution for Windows host environments HANDS
DOWN!– RF Simplicity could be used to off load processing from
typical TE hosts
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Ethernet
PC runningWindows 95,98, or NT
Host Connectivity
• Typical RF Simplicity configuration
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ngHost Connectivity
• RF Simplicity – off loading processing from typical TE host
Ethernet
PC runningWindows 95,98, or NT
IBM AS/400
customerwritten
interface
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ngHost Connectivity
• Custom application development– DOS client in Ethernet
TCP/IP environment– C programming– TCP/IP sockets interface,
large task for many programmers
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ngWireless Technologies
• Frequency Hopping (FH)– WLIF– aka “OpenAir” Standard
• Direct Sequence (DS)– 802.11b (DS)– IEEE Standard
• Vendors
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ngWireless Technologies
• Frequency hopping spread spectrum.– Transmits on a single frequency for
specified period of time, then hops to another frequency for a period of time etc.
2.4 GHz 2.4835 GHz
6 1 4 8 3 5 9 2 7HoppingPattern
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• Frequency hopping spread spectrum.– Interference avoidance by hopping.– Interfered transmission is resent.
2.4 GHz 2.4835 GHz
6 1 4 8 3 5 9 2 7HoppingPattern
Data transm itted on hop num ber 8 would be re-transm itted
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• Direct Sequence Spread Spectrum• Data is split up and redundantly transmitted
simultaneously over a large bandwidth
2.4 GHz 2.4835 GHz
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ngWireless Technologies
• Direct Sequence Spread Spectrum– 11 - 22 MHz wide stationary channels– 11, 5.5, 2 and 1 Mbps data rates possible– 3 non-overlapping 22 MHz channels– Potential 33Mbps with 3 Access Points
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ng2.4 GHz Solutions
• WLIF– Proxim based solution “OpenAir Standard”
– Frequency Hopper
– HHP supported
– Will not work with 802.11 Frequency Hopper!
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ng2.4 GHz Solutions
• 802.11b– Direct Sequence Spread Spectrum
– HHP supported with Aironet/Cisco,
– Aironet/Cisco radio interoperable with existing 802.11b competitor installations
sale
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ngTechnical Sales Tips
• Questions to ask– Host system (AS/400, S390, etc…)?– Wired backbone architecture (Ethernet,
Token Ring, etc…)?– Emulation type (VT100/220, 3270, 5250)?– Size of area to cover?– What is being stored in area?
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ngTechnical Sales Tips
• Questions to ask cont’d– Desired throughput (what can the customer
live with)?– Security?– Site Survey needed?– Number of terminals required per location?– Remote locations?– Type of data being collected (numeric v/s
alpha)?
sale
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ngTechnical Sales Tips
• Once answers are collected, 90% of homework is done.
• Call HHP RF Systems Engineers for further assistance!
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Questions?
