1. Chris Murphy 31 January 2005 Motorola General Business Information MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office. All other product or service names are the property of their respective owners. © Motorola, Inc. 2002. Place your image on top of this gray box. If no graphic is applicable, delete gray box and notch-out behind gray box, from the Title Master Telecommunication networks and cellular radio Chris Murphy Motorola

2. Cellular telecommunications

3. The radio interface Create healthy networks Design optimisation services Detect failure conditions Predict performance (change management)

4. Parameters Cell characteristics: –Power –Antenna location/orientation –Resource availability Subscriber characteristics: –Locations –Services –Quantity

5. Is it a complex system? Useful signal Interference Signal strength =

6. Is it a complex system? Cell selection Soft handoff Radio resource management Emergent (Theme C)? Stochastic (Theme E)?

7. End to end performance Server Radio Access Network Internet Subscribers Scheduler

8. Components of the problem Internet Air interface Scheduler TCP/IP Problems with throughput? –Latency –Data rate –Fairness Detect/diagnose problems How to optimise

9. Telecoms and Complex Systems Theme C: Emergent behaviour –We know the microscopic rules but need the macroscopic insight Highly structures stochastic systems