1. Rate Control Algorithm In Wireless Network, Cross Layer Design
By : Ahmad askarian
Summer 2009
SDR project

2. Questions How is rate control in wired and wireless network?
What is the rate control problem in wireless networks?
How Cross Layer Design could be a solution?

3. Rate Control in Internet
TCP congestion control
end to end, implicit and dynamic window
AIMD
Optimization framework
MCFC
Kelly

4. TCP Reno
time
cwnd
Slow Start
Congestion Avoidance

5. AIMD Assume discrete time, Linear adaptation algorithm is as follows
Feedback signal is defined as

6. Conventional Method
Algorithm constants evolve as:
Where &

11. Optimization Framework , Example:
User 0
User 1
User 2 cA cB

12. MCFC:

13. Modified MCFC

14. Simulation: Session1 L3,L4 Session2 L1,L2 Session3 L4 Session4 L1 S2D1 D2 D3 D4
Session1
L3,L4
Session2
L1,L2
Session3 L4
Session4 L1

15. Result :

16. Questions How is rate control in wired and wireless network?
What is the rate control problem in wireless networks?
How Cross Layer Design could be a solution?

17. Thank You!
Questions?