Thomas Kunz
Systems and
Computer Engineering
10
Activity Factor
lWireless link is scarce resource, but is it well used by
user/browser?
lActivity Factor: percentage of time that channel is used
to transmit data
lDetermination:
uHow long is channel allocated to user
XTrivial for pure circuit-switched connection
XMore complicated for CDMA, where channel is not always
at full rate
uHow much time is spent transferring user data
Xassuming link bandwidth of 19.2 kbps
Xdata volume per session known from traces
lActivity factors differ for uplink and downlink, but are
constant for period studied
uUplink: 11%
uDownlink: 30%