Site Surveys; Roaming Between Asus Aps; Roaming Guidelines - Asus WL-HDD User Manual

Chapter 1 - Introduction

Site Surveys

A site survey analyzes the installation environment and provides users with
recommendations for equipment and its placement. The optimum placement
differs depending on the ASUS AP design and specifications.

Roaming Between ASUS APs

If there are multiple ASUS APs on the network, then a wireless mobile client
may seamlessly roam from one ASUS AP to another.
Each ASUS AP creates its own wireless cell or coverage area. This is also known
as a Basic Service Set (BSS). Any wireless mobile client can communicate with
a particular ASUS AP if it is within the ASUS AP's coverage area.
If the cells of multiple ASUS APs overlap, then the wireless mobile client may
switch from one ASUS AP to another as it travels throughout the building. During
the hand-off from one ASUS AP to another, the wireless mobile client maintains
an uninterrupted connection to the network. This is known as "roaming."
Multiple ASUS APs connected to a common Ethernet network form an Extended
Service Set (ESS). All members of an Extended Service Set are configured with
an ID, known as the SSID or ESSID. Wireless mobile clients must be configured
with the same SSID as the ASUS APs on the network; a client can only roam
between ASUS APs that share the same SSID.

Roaming Guidelines

• An ASUS WLAN card can only roam between APs of the same type.
• All ASUS APs must have the same SSID.
• All ASUS WLAN cards must have the same SSID as the APs that they will
roam between.
• If WEP encryption is enabled, then all ASUS APs and client adapters must
use the same encryption level and WEP Key(s) to communicate.
• ASUS APs' cells must overlap to ensure that there are no gaps in coverage
and to ensure that the roaming client will always have a connection available.
• ASUS APs that use the same Channel should be installed as far away from
each other as possible to reduce potential interference.
• It is strongly recommended that you perform a site survey using the utility
provided with the ASUS WLAN card to determine the best location for
each ASUS AP in the building.
14 ASUS Wireless "WL-HDD" User's Manual