User's Manual

Chapter 4: Access Point Configuration
Mobility Configuration
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Teklogix 9150 Wireless Gateway User Manual
4.5 Mobility Configuration
The Mobility Configuration page is entered from the Access Point Configuration
menu on the first page.
Going to the Mobility Configuration page opens the IAPP Parameters options.
The Inter-Access Point Protocol (IAPP) is an extension to the IEEE 802.11b
protocol. In a multiple-9150 system, IAPP facilitates roaming of mobile stations
(terminals) among the 9150s, and enables communication and awareness between
the 9150s.
Every terminal is associated with one 9150, but it can re-associate with another 9150
to maintain uninterrupted communications. The association is “handed over” from
one 9150 to the next. The newly-associated 9150 will receive the terminal’s data
frames and pass them onto the LAN. Returning frames are no longer accepted by the
original 9150, which has disassociated from that terminal. Returning frames are now
accepted by the newly-associated 9150 and passed over the RF to the terminal.
To implement these procedures and coordinate the 9150s, IAPP specifies two
message types: Announce and Handover.