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90
L i f e B o o k B S e r i e s N o t e b o o k - A p p e n d i x A
Before Using the Wireless LAN
This manual describes the procedures required to prop-
erly setup and configure the optional integrated Wireless
LAN Mini-PCI device (referred to as "WLAN device" in
the rest of the manual). Before using the WLAN device,
read this manual carefully to ensure it's correct opera-
tion. Keep this manual in a safe place for future refer-
ence.
Wireless LAN Devices Covered by this Document
This document is applicable to systems containing an
Atheros AR5006XS (WLL4070) Mini-PCI wireless
network card
Characteristics of the WLAN Device
■
The WLAN device is a Mini-PCI card attached to the
mainboard of the mobile computer.
■
It is a dual-band radio that operates in two license-free
RF bands, therefore eliminating the need to procure an
FCC license to operate. It operates in the 2.4GHz
Industrial, Scientific, and Medical (ISM) RF band.
Additionally, the Atheros device operates in the lower,
middle, and upper bands of the 5GHz Unlicensed
National Information Infrastructure (UNII) bands.
■
The Atheros SuperAG WLAN is capable of three oper-
ating modes, IEEE802.11a, IEEE802.11b and
IEEE802.11g, wireless LAN standards governed by the
IEEE (Institute of Electronics and Electrical Engi-
neers).
■
Encoding of data is modulated using Direct Sequence
Spread Spectrum (DSSS) and Complementary Code
Keying (CCK) when the WLAN device is operating in
IEEE 802.11b mode and Orthogonal Frequency Divi-
sion Multiplexing (OFDM) when operating in
IEEE802.11a or IEEE802.11g mode.
■
The WLAN device is Wi-Fi certified and operates at
the maximum data transfer rate of 54 Mbps in
IEEE802.11a or IEEE802.11g mode and 11 Mbps in
IEEE802.11b mode.
■
The maximum communication range indoors is
approximately 80 feet (25 meters). However, that
range will increase or decrease depending on factors
such as number of walls, reflective material, or inter-
ference from external RF sources.
■
The WLAN device supports the following encryption
methods - WEP, TKIP, CKIP, and AES encryption.
WIRELESS LAN MODES USING THIS DEVICE
Ad Hoc Mode
(See Figure A-1)
"Ad Hoc Mode" refers to a wireless network architecture
where wireless network connectivity between multiple
computers is established without a central wireless
network device, typically known as Access Point(s).
Connectivity is accomplished using only client devices in
a peer-to-peer fashion. That is why Ad Hoc networks are
also known as peer-to-peer networks. Ad Hoc networks
are an easy and inexpensive method for establishing
network connectivity between multiple computers.
Ad Hoc mode requires that the SSID (service set identi-
fier), network authentication, and encryption key
settings are identically configured on all computers in
the Ad Hoc network.
Access Point (Infrastructure) Mode
(See Figure A-2)
Infrastructure mode refers to a wireless network archi-
tecture in which devices communicate with wireless or
wired network devices by communicating through an
Access Point. In infrastructure mode, wireless devices
can communicate with each other or with a wired
network. Corporate wireless networks operate in infra-
Figure A-1. Ad Hoc Mode Network
B Series.book Page 90 Wednesday, April 27, 2005 8:59 AM