1. Wireless LAN Technologies and Products
Chapter 4
Wireless LAN Technologies and Products
2018/11/12
Prof. Huei-Wen Ferng

2. Wireless LAN Products
2018/11/12
Prof. Huei-Wen Ferng

3. Choosing a WLAN What are the applications? Is mobility required?
What level of performance is acceptable?
Will infrared satisfy the needs?
To what backbone networks do we need to connect?
With what network OS do we need to work?
Is it secure?
How easy is it to install? To use? To manage?
How much does it cost? ($500)
2018/11/12
Prof. Huei-Wen Ferng

4. Current Applications Wire replacement applications
Mobile computing applications
2018/11/12
Prof. Huei-Wen Ferng

5. 2018/11/12
Prof. Huei-Wen Ferng

6. Lucent WaveLAN
2018/11/12
Prof. Huei-Wen Ferng

7. Product Line
2018/11/12
Prof. Huei-Wen Ferng

8. Network Topology
2018/11/12
Prof. Huei-Wen Ferng

9. Components of AP
A wireless LAN adaptor to communicate with the wireless nodes
A wired adaptor to communicate over the backbone
MAC layer bridging software to filter traffic from the backbone to the wireless subnet
2018/11/12
Prof. Huei-Wen Ferng

10. System Engineering Spec.
The radio
MHz ISM band
GHz ISM band
250 mw power output in 900 MHz band, 100 mw in the 2.4 GHz band
MAC
CSMA/CA
Modulation
DSSS
DQPSK
Protocols supported
Novell NetWare 2.x and 3.x
TCP/IP
LAN manger
Windows for workgroups
Banyan VINES
2018/11/12
Prof. Huei-Wen Ferng

11. AP’s Functions MAC layer transparent bridge (IEEE 802.1D)
Filtering/forwarding
Automatic learning and aging
Spanning tree algorithm
SNMP management
Radio path diagnostics
Access control
Net ID
2018/11/12
Prof. Huei-Wen Ferng

12. Supported PHY Types of Ethernet
10BaseT
Twisted pair Ethernet
10Base2
Thin wire Ethernet
10Base5
Thick wire Ethernet
2018/11/12
Prof. Huei-Wen Ferng

13. DEC
2018/11/12
Prof. Huei-Wen Ferng

14. Product Line
2018/11/12
Prof. Huei-Wen Ferng

15. Protocols Supported Pathworks V4.1 Novell NetWare 2.x and 3.x TCP/IP
LAN manager
Windows for workgroups
Banyan VINES
2018/11/12
Prof. Huei-Wen Ferng

16. Products in the World
2018/11/12
Prof. Huei-Wen Ferng

17. Products DECtransporter for the MS-DOS/MS-Windows
A TCP/IP package
Enables cellular connection with appropriate modem, or a wired connection with appropriate modem
DECtransporter for OpenVMS VAX
A TCP/IP to packet radio network gateway
Enables connection to a private network over a public packet radio network such as Mobitex or ARDIS
2018/11/12
Prof. Huei-Wen Ferng

18. Remote Connectivity Configuration
2018/11/12
Prof. Huei-Wen Ferng

19. Solectek AIRLAN
2018/11/12
Prof. Huei-Wen Ferng

20. Protocols Supported
2018/11/12
Prof. Huei-Wen Ferng

21. Proxim RangeLAN 2
2018/11/12
Prof. Huei-Wen Ferng

22. Product Line
2018/11/12
Prof. Huei-Wen Ferng

23. Network Topology
2018/11/12
Prof. Huei-Wen Ferng

24. System Technology FHSS 2.4-2.483 GHz ISM band 15 independent channels
CSMA/CA
100 mw transmitted power
GaAs semiconductor
Power from computer’s internal battery
2018/11/12
Prof. Huei-Wen Ferng

25. AP’s Capabilities MAC layer bridge Spanning tree protocol
Roaming from one bridge to another
Transparent to all Ethernets
SNMP agent provided
Diverse protocols supported
Novell NetWare 2.x, 3.x, 4.x, Lite
LAN manager
Windows for Workgroups
2018/11/12
Prof. Huei-Wen Ferng

26. ISA Equipment Interface card Antenna Software Manual 2018/11/12
Prof. Huei-Wen Ferng

27. Installation Hardware Software Confirm default setting on card
Install card in computer
Screw antenna onto connector in back of card
Software
Copy configured IPX.COM driver to hard disk
Load the IPX driver and DOS shell, NETX
Copy the LOGIN.EXE file
2018/11/12
Prof. Huei-Wen Ferng

28. Xircom Netwave
2018/11/12
Prof. Huei-Wen Ferng

29. Product Line
2018/11/12
Prof. Huei-Wen Ferng

30. Technology FHSS 50 mw power output 2.4-2.483 GHz ISM band
Hop every 0.1s
Synchronized system
2018/11/12
Prof. Huei-Wen Ferng

31. Network Topology
2018/11/12
Prof. Huei-Wen Ferng

32. Two Kinds of Ad Hoc Nets Public hoc networks Named ad hoc networks
Anyone in range can join a public ad hoc network
Named ad hoc networks
One station must start a named network
Other stations join if they specify the name
Optional encryption is available
2018/11/12
Prof. Huei-Wen Ferng

33. IBM Wireless LAN
2018/11/12
Prof. Huei-Wen Ferng

34. Technology FHSS in the 2.4 GHz band 100 mw power output
Antenna receive polarization diversity
TDMA MAC layer (FCFS)
Ethernet and Token Ring compatibility
SNMP agent
2018/11/12
Prof. Huei-Wen Ferng

35. Administration Function
Authentication and privacy
Users are registered with WNA (wireless network administrator) and provided secret keys
Registered stations are authenticated by AP
Optional encryption is available
Interference management through change of hopping pattern
2018/11/12
Prof. Huei-Wen Ferng

36. Motorola Altair
2018/11/12
Prof. Huei-Wen Ferng

37. Technology Not SS In the 18 GHz band Low power- 25 mw
Comprised of a control module (CM) and a user module (UM)
8x11.5x3 inches in size
Antenna internal to module
Packaging similar for both modules
2018/11/12
Prof. Huei-Wen Ferng

38. Network Topology
2018/11/12
Prof. Huei-Wen Ferng

39. Windata
2018/11/12
Prof. Huei-Wen Ferng

40. Product Line
2018/11/12
Prof. Huei-Wen Ferng

41. The Hub Functions Connectivity of transceivers Synchronization
Access security
Power control
Network management
2018/11/12
Prof. Huei-Wen Ferng

42. SNMP Functions Enabling and disabling transceivers
Adding and deleting access to stations
Monitoring performance
Checking status of radio link
2018/11/12
Prof. Huei-Wen Ferng

43. Network Topology
2018/11/12
Prof. Huei-Wen Ferng

44. RadioLAN
2018/11/12
Prof. Huei-Wen Ferng

45. Product Line ISA card Parallel port version RadioLAN/10 Access Unit
Radio transceiver
Base station
2018/11/12
Prof. Huei-Wen Ferng

46. OS and Driver Support
2018/11/12
Prof. Huei-Wen Ferng

47. Photonics
2018/11/12
Prof. Huei-Wen Ferng

48. Product Line (for PC) PCMCIA II card ISA card
Collaborative parallel option AP
External transceiver
2018/11/12
Prof. Huei-Wen Ferng

49. IR Transceiver
2018/11/12
Prof. Huei-Wen Ferng

50. Diffuse IR
2018/11/12
Prof. Huei-Wen Ferng

51. Network Topology
2018/11/12
Prof. Huei-Wen Ferng

52. Spectrix
2018/11/12
Prof. Huei-Wen Ferng

53. Network Topology
2018/11/12
Prof. Huei-Wen Ferng

54. Network Block Diagram
2018/11/12
Prof. Huei-Wen Ferng

55. InfraLAN
2018/11/12
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56. Directed IR Transceiver
2018/11/12
Prof. Huei-Wen Ferng

57. Network Topology (Token Ring)
2018/11/12
Prof. Huei-Wen Ferng

58. Network Topology (Ethernet PTP)
2018/11/12
Prof. Huei-Wen Ferng

59. Network Topology (Ethernet Hub)
2018/11/12
Prof. Huei-Wen Ferng

60. Comparisons (Mobile)
2018/11/12
Prof. Huei-Wen Ferng

61. Comparisons (Wire Replacement)
2018/11/12
Prof. Huei-Wen Ferng

62. References
Rifaat A. Dayem, Mobile Data & Wireless LAN Technologies, Chapter 7.
2018/11/12
Prof. Huei-Wen Ferng