Please provide me PPT of chapter 2 Wireless lans and pans

Basic Service Set
„ Set of stations that communicate with each other
„ Independe
nt BSS (
IBSS)
„ When all stations in a BSS are mobile and there is no connection
to a
wired network
„ Typically short-lived with a small numb
er of stations
„ Ad-hoc in nature
„ Station
s com
m
u
nicate directly with one ano
ther
„ No relay capabilities– no
d
es must be in direct rang
e
„ Infrastructure BSS (BSS)
„ Includes an Access Point (AP)
„ All mobiles communicate directly to AP
„ AP provides connection to wired LAN and relay functionality
„ Use of AP may increase BW (2-hop rather than 1-hop data tx)
„ AP provides central control, allows packet buffering, etc.

Distribution System (DS)

„ Mechanism that allows APs
to communicate with each other
and wired infrastructure (if available)
„ Backbone of the WLAN
„ May contain both wired and wireless networks
„ Functionality in each AP that determines where received
packet should be sent
„ To another station within the same BSS
„ To the DS of another AP (e.g., sent to another BSS)
„ To the wired infrastructure for a destination not in the
ESS
„ When DS of AP receives packet, it is sent to station in BSS