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Wireless-G Access Point
What is Roaming?
Roaming is the ability of a portable computer user to communicate continu-
ously while moving freely throughout an area greater than that covered by a
single Access Point. Before using the roaming function, the workstation must
make sure that it is the same channel number as the Access Point of the dedi-
cated coverage area.
To achieve true seamless connectivity, the wireless LAN must incorporate a
number of different functions. Each node and Access Point, for example, must
always acknowledge receipt of each message. Each node must maintain contact
with the wireless network even when not actually transmitting data. Achieving
these functions simultaneously requires a dynamic RF networking technology
that links Access Points and nodes. In such a system, the user’s end node under-
takes a search for the best possible access to the system. First, it evaluates such
factors as signal strength and quality, as well as the message load currently
being carried by each Access Point and the distance of each Access Point to the
wired backbone. Based on that information, the node next selects the right
Access Point and registers its address. Communications between end node and
host computer can then be transmitted up and down the backbone.
As the user moves on, the end node’s RF transmitter regularly checks the sys-
tem to determine whether it is in touch with the original Access Point or
whether it should seek a new one. When a node no longer receives acknowl-
edgment from its original Access Point, it undertakes a new search. Upon find-
ing a new Access Point, it then re-registers, and the communication process
continues.
What is BSS ID?
A specific Ad-hoc LAN is called a Basic Service Set (BSS). Computers in a
BSS must be configured with the same BSS ID.
What is ESSID?
An Infrastructure configuration could also support roaming capability for
mobile workers. More than one BSS can be configured as an Extended Service
Set (ESS). Users within an ESS could roam freely between BSSs while main-
taining a continuous connection to the wireless network stations and Access
Points.
What is ISM band?
The FCC and their counterparts outside of the U.S. have set aside bandwidth
for unlicensed use in the ISM (Industrial, Scientific and Medical) band.
Spectrum in the vicinity of 2.4 GHz, in particular, is being made available
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Appendix A: Troubleshooting
This chapter provides solutions to problems usually encountered during the
installation and operation of the Access Point. Read the description below to
solve your problems. If you can’t find an answer here, check the Linksys web-
site at www.linksys.com.
Can the Access Point act as my DHCP Server?
No. The Access Point is nothing more than a wireless hub, and as such cannot
be configured to handle DHCP capabilities.
Can I run an application from a remote computer over the wireless net-
work?
This will depend on whether or not the application is designed to be used over
a network. Consult the application’s user guide to determine if it supports oper-
ation over a network.
Can I play multiplayer games with other users of the wireless network?
Yes, as long as the game supports multiple players over a LAN (local area net-
work). Refer to the game’s user guide for more information.
What IEEE 802.11b features are supported?
The product supports the following IEEE 802.11 functions:
• CSMA/CA plus Acknowledge protocol
• Multi-Channel Roaming
• Automatic Rate Selection
• RTS/CTS feature
• Fragmentation
• Power Management
What is Ad-hoc?
An Ad-hoc wireless LAN is a group of computers, each with a WLAN adapter,
connected as an independent wireless LAN. An Ad-hoc wireless LAN is appli-
cable at a departmental scale for a branch or SOHO operation.
What is Infrastructure?
An integrated wireless and wired LAN is called an Infrastructure configura-
tion. Infrastructure is applicable to enterprise scale for wireless access to a cen-
tral database, or wireless application for mobile workers.
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Frequently Asked Questions