In order to provide service differentiation in 802.11 wireless local area networks, the 802.11e working group has recently proposed the hybrid coordination function (HCF) along with a HCF controlled channel access (HCCA). However, the 802.11e proposal does not specify an effective bandwidth allocation algorithm. Recently, to overcome this limitation, a control theoretic framework has been proposed in literature. Within such a framework, this paper proposes a new allocation algorithm based on a proportional-integral-derivative (PID) controller. Moreover, a performance comparison among the simple Scheduler introduced by 802.11e standard and three bandwidth allocations algorithms, designed using different dynamic regulators, has been carried out. Ns-2 simulation results showed that the best trade-off between packet delays and number of admitted flows is achieved by a properly tuned PID regulator.
Performance Evaluation of Feedback-based Bandwidth Allocation Algorithms for 802.11e MAC / Boggia, Gennaro; Camarda, Pietro; Grieco, Luigi Alfredo; Mascolo, Saverio; Stefanelli, A.. - (2007), pp. 835-839. (Intervento presentato al convegno IEEE 65th Vehicular Technology Conference, VTC2007-Spring tenutosi a Dublin, Ireland nel April 22- 25, 2007) [10.1109/VETECS.2007.181].
Performance Evaluation of Feedback-based Bandwidth Allocation Algorithms for 802.11e MAC
BOGGIA, Gennaro;CAMARDA, Pietro;GRIECO, Luigi Alfredo;MASCOLO, Saverio;
2007-01-01
Abstract
In order to provide service differentiation in 802.11 wireless local area networks, the 802.11e working group has recently proposed the hybrid coordination function (HCF) along with a HCF controlled channel access (HCCA). However, the 802.11e proposal does not specify an effective bandwidth allocation algorithm. Recently, to overcome this limitation, a control theoretic framework has been proposed in literature. Within such a framework, this paper proposes a new allocation algorithm based on a proportional-integral-derivative (PID) controller. Moreover, a performance comparison among the simple Scheduler introduced by 802.11e standard and three bandwidth allocations algorithms, designed using different dynamic regulators, has been carried out. Ns-2 simulation results showed that the best trade-off between packet delays and number of admitted flows is achieved by a properly tuned PID regulator.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
