Please provide me PPT of chapter 2 Wireless lans and pans
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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