Throughput Optimization in Wireless Networks under Stability and Packet Loss Constraints

Pedro H. J. Nardelli (1) , Marios Kountouris (2) , Paulo Cardieri (3) , Matti Latva-Aho (1)

1 CWC - Centre for Wireless Communications [University of Oulu]
2 E3S - Supélec Sciences des Systèmes
3 WissTek - Wireless Technology Laboratory [University of Campinas]

In this paper, the problem of throughput optimization in decentralized wireless networks with spatial randomness under queue stability and packet loss constraints is investigated. Two key performance measures are analyzed, namely the effective link throughput and the network spatial throughput. Specifically, the combination of medium access probability, coding rate, and maximum number of retransmissions that maximize each throughput metric is analytically derived for a class of Poisson networks, in which packets arrive at the transmitters following a geometrical distribution. Necessary conditions so that the effective link throughput and the network spatial throughput are stably achievable under bounded packet loss are determined, as well as upper bounds for both cases by solving the unconstrained optimization problem. Our results show in which system configuration stable achievable throughputs can be obtained as a function of the network density and the arrival rate. They also evince conditions for which the per-link throughput-maximizing operating points coincide or not with the aggregate network throughput-maximizing operating regime.

Domaines: Théorie de l'information et codage [math.IT]; Théorie de l'information [cs.IT]

Pedro H. J. Nardelli, Marios Kountouris, Paulo Cardieri, Matti Latva-Aho. Throughput Optimization in Wireless Networks under Stability and Packet Loss Constraints. IEEE Transactions on Mobile Computing, 2014, 13 (8), pp.1883-1895. ⟨10.1109/TMC.2013.49⟩. ⟨hal-00827012⟩