A comparison of wi-fi and wimax with case studies - Florida State ...
A comparison of wi-fi and wimax with case studies - Florida State ...
A comparison of wi-fi and wimax with case studies - Florida State ...
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There aare<br />
varies <strong>of</strong><br />
parameterrs.<br />
[50] The e SFID is isssued<br />
<strong>and</strong> mmapped<br />
to CCIDs<br />
by the e BS. Theree<br />
are fouur<br />
types <strong>of</strong> scheduling g services ffor<br />
providinng<br />
the best performannce<br />
<strong>of</strong> data transfer <strong>of</strong>f<br />
various applicationns.<br />
[50] Tabble<br />
4-4[50][ 108] – [1122]<br />
<br />
UGGS<br />
is designned<br />
to suppoort<br />
real-timee<br />
<strong>fi</strong>xed-sizee<br />
packets peeriodic<br />
transsmission<br />
at constant bitt<br />
rate (CBBR),<br />
for exaample<br />
T1.<br />
<br />
Thi is scheme iss<br />
designed tto<br />
support rreal-time<br />
unn<strong>fi</strong>xed-size<br />
ppackets<br />
perriodic<br />
transmmission.<br />
Ann<br />
example<br />
is MPEG video. Thiss<br />
service allows<br />
BS to provide unnicast<br />
pollinng<br />
opportun nities for thee<br />
MS to rrequest<br />
b<strong>and</strong>d<strong>wi</strong>dth.<br />
<br />
Unsolicitedd<br />
grant servi ices (UGS)<br />
Real-time ppolling<br />
services<br />
(rtPS)<br />
Non-real-timme<br />
polling service (nrttPS)<br />
Table 4-4 Service Floows<br />
in WiMMax<br />
Thi is one suppoorts<br />
delay-ttolerant<br />
dataa<br />
streams w<strong>wi</strong>th<br />
un<strong>fi</strong>xed-size<br />
packetts,<br />
like FTP P. The nrtPSS<br />
<strong>and</strong> rtPPs<br />
are similar.<br />
The diffference<br />
is tthat<br />
a MS can use coontention-baased<br />
polling g or unicastt<br />
polling opportunitiies<br />
in the upplink<br />
to requuest<br />
b<strong>and</strong><strong>wi</strong>idth<br />
in nrtPSS<br />
service.<br />
48