Name
Abstract | ||
|---|---|---|
The recent deployment of data-rich smart phones has led to a fresh impetus for understanding the performance of wide area ad hoc networks. The most popular medium access mechanism for such ad hoc networks is CSMA/CA with RTS/CTS. In CSMA-like mechanisms, spatial reuse is achieved by implementing energy-based guard zones. We consider the problem of simultaneously scheduling the maximum number of links that can achieve a given signal to interference ratio (SIR). In this paper, using tools from stochastic geometry, we study and maximize the medium access probability of a typical link. Our contributions are two-fold: (i) We show that a simple modification to the RTS/CTS mechanism, viz., changing the receiver yield decision from an energy-level guard zone to an SIR guard zone, leads to performance gains; and (ii) We show that this combined with a simple modification to the transmit power level--setting it inversely proportional to the square root of the link gain--leads to significant improvements in network throughput. Further, this simple power-level choice is no worse than a factor of two away from optimal over the class of all "local" power level selection strategies for fading channels, and further is optimal in the non-fading case. The analysis relies on an extension of the Matérn hard core point process which allows us to quantify both these SIR guard zones and this power control mechanism. |
Year | DOI | Venue |
|---|---|---|
2011 | 10.1007/s11134-012-9289-7 | Queueing Systems: Theory and Applications |
Keywords | DocType | Volume |
energy-level guard zone,power control mechanism,optimizing csma,cts mechanism,wide area,power level,simple modification,popular medium access mechanism,energy-based guard zone,power level selection strategy,csma-like mechanism,sir guard zone,level set,fading,cts,geometry,stochastic processes,ca,ad hoc networks,network throughput,scheduling,power control,ad hoc network,transmitters,stochastic geometry,throughput | Conference | 72 |
Issue | ISSN | Citations |
1-2 | 1572-9443 | 16 |
PageRank | References | Authors |
1.59 | 13 | 6 |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Francois Baccelli | 1 | 812 | 86.80 |
| Junyi Li | 2 | 327 | 33.48 |
| Thomas Richardson | 3 | 16 | 1.59 |
| Sanjay Shakkottai | 4 | 1467 | 147.23 |
| Sundar Subramanian | 5 | 250 | 15.50 |
| Xinzhou Wu | 6 | 655 | 50.94 |