WWRF
· Xiaojing Tao ·
xiaojing@sce.carleton.ca · 18.02.2005· Carleton University · WWRF 13 WG3
page 5
Adaptive
Traffic Balancing
•As mobility that causes collisions and transmission loss, the measured medium usage under the busy state may vary (backoff period)
•Examples (5.3 Kbps with packet size of 64 bytes):
-0 m/s (max. moving speed)
(0.06+0.06+0.32+0.06)/(0.06+0.01+0.06+0.01+0.32+0.01+0.06+0.01)=92.59%
-5 m/s
(0.06+0.06+0.32+0.06)*10/((0.06+0.01+0.06+0.01+0.32+0.01+0.06+0.01)*9+(0.06+0.02*15+0.06+0.02*15+0.32+0.02*15+0.06+0.02*15))=76.22%
-Transmission rate is 2 Mbps and it takes
around 0.06 ms to transmit a RTS or
CTS or ACK. The data packet needs 0.32 ms to be sent and the interframe period is 0.01 ms