| Speaker: | Dr. Thomas Boland, France Telecom R&D and ENS Paris, France |
|---|---|
| Abstract: | We consider cellular data networks where the transmission power of each base station is time-shared as in cdma2000 HDR and UMTS HSDPA systems. We insist on the importance of accounting for the random nature of the population of active users. The fact that flow throughput depends significantly on local radio conditions and the way scheduling accounts for them has a profound impact on system performance. Under realistic traffic assumptions, we derive analytical results relating throughput and blocking performance to the cell size and traffic density. These results are used to address a number of practically interesting issues, including the trade-off between cell coverage and cell capacity, the design of scheduling and admission control schemes and the scope for service differentiation. We point to potentially misleading conclusions that can be drawn when the dynamic nature of traffic is ignored. |
| Biography: | Thomas Bonald is a member of the traffic modelling group at France Telecom R&D, working on performance evaluation and design of control mechanisms for fixed and wireless networks. His research interests include queueing theory and stochastic models of communication networks. He graduated from Ecole Polytechnique (Palaiseau, France) in 1994 and qualified as an engineer at Ecole Nationale Superieure des Telecommunications (Paris, France) in 1996, with emphasis on corporate communication at Eurecom (Sophia-Antipolis, France). He holds a PhD in applied mathematics from Ecole Polytechnique, his graduate research having been performed at INRIA-Sophia Antipolis in the area ofnetwork flow control. |
| Presented On: | Thursday May 12, 2005 |
| Videotape: | <Not available.> |
