First order metrics (throughput, average delay) of the IEEE 802.11 DCF MAC protocol have been extensively analyzed. In this work the probability distribution of the service time is derived and it is used to highlight the source of service time burstiness. It is proved that the variance of the service time is minimized by taking the same contention window value at each back off stage, under the constraint that the saturation throughput has a given value. A trade off between throughput efficiency and variance of the service times is computed and the binary exponential back off mechanism is found to be responsible of the bursty service process of IEEE 802.11 DCF. Implication of this result on the design and tuning of IEEE 802.11 DCF parameters is discussed.

Variability of Service Times and Throughput Efficiency Trade-Off in IEEE 802.11 DCF / BAIOCCHI, Andrea. - (2009), pp. 129-136. (Intervento presentato al convegno 21st International Teletraffic Congress (ITC 21) tenutosi a Paris; France nel SEP 15-17, 2009).

Variability of Service Times and Throughput Efficiency Trade-Off in IEEE 802.11 DCF

BAIOCCHI, Andrea
2009

Abstract

First order metrics (throughput, average delay) of the IEEE 802.11 DCF MAC protocol have been extensively analyzed. In this work the probability distribution of the service time is derived and it is used to highlight the source of service time burstiness. It is proved that the variance of the service time is minimized by taking the same contention window value at each back off stage, under the constraint that the saturation throughput has a given value. A trade off between throughput efficiency and variance of the service times is computed and the binary exponential back off mechanism is found to be responsible of the bursty service process of IEEE 802.11 DCF. Implication of this result on the design and tuning of IEEE 802.11 DCF parameters is discussed.
2009
21st International Teletraffic Congress (ITC 21)
average delay; back-off; binary exponential backoff; burstiness; bursty services; contention window; first order; ieee 802.11 dcf; mac protocol; saturation throughput; service time; source of service; throughput efficiency; trade off
Pubblicazione in atti di convegno::04b Atto di convegno in volume
Variability of Service Times and Throughput Efficiency Trade-Off in IEEE 802.11 DCF / BAIOCCHI, Andrea. - (2009), pp. 129-136. (Intervento presentato al convegno 21st International Teletraffic Congress (ITC 21) tenutosi a Paris; France nel SEP 15-17, 2009).
File allegati a questo prodotto
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/203643
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 2
  • ???jsp.display-item.citation.isi??? 0
social impact