TY - GEN
T1 - How mobility impacts the flow-level performance of wireless data systems
AU - Bonald, T.
AU - Borst, S. C.
AU - Proutière, A.
PY - 2004/11/22
Y1 - 2004/11/22
N2 - The potential for exploiting rate variations to increase the capacity of wireless systems by opportunistic scheduling has been extensively studied at packet level. In the present paper, we examine how slower, mobility-induced rate variations impact performance at flow level, accounting for the random number of flows sharing the transmission resource. We identify two limit regimes, termed fluid and quasi-stationary, where the rate variations occur on an infinitely fast and an infinitely slow time scale, respectively. Using stochastic comparison techniques, we show that these limit regimes provide simple performance bounds that only depend on easily calculated load factors. Additionally, we prove that for a broad class of fading processes, performance varies monotically with the speed of the rate variations. These results are illustrated through numerical experiments, showing that the fluid and quasi-stationary bounds are remarkably tight in certain usual cases.
AB - The potential for exploiting rate variations to increase the capacity of wireless systems by opportunistic scheduling has been extensively studied at packet level. In the present paper, we examine how slower, mobility-induced rate variations impact performance at flow level, accounting for the random number of flows sharing the transmission resource. We identify two limit regimes, termed fluid and quasi-stationary, where the rate variations occur on an infinitely fast and an infinitely slow time scale, respectively. Using stochastic comparison techniques, we show that these limit regimes provide simple performance bounds that only depend on easily calculated load factors. Additionally, we prove that for a broad class of fading processes, performance varies monotically with the speed of the rate variations. These results are illustrated through numerical experiments, showing that the fluid and quasi-stationary bounds are remarkably tight in certain usual cases.
U2 - 10.1109/INFCOM.2004.1354597
DO - 10.1109/INFCOM.2004.1354597
M3 - Conference contribution
AN - SCOPUS:8344250174
SN - 0780383559
T3 - Proceedings - IEEE INFOCOM
SP - 1872
EP - 1881
BT - IEEE INFOCOM 2004 - Conference on Computer Communications - Twenty-Third Annual Joint Conference of the IEEE Computer and Communications Societies
T2 - IEEE INFOCOM 2004 - Conference on Computer Communications - Twenty-Third Annual Joint Conference of the IEEE Computer and Communications Societies
Y2 - 7 March 2004 through 11 March 2004
ER -