A Reservation-Based Enhancement of IEEE 802.11 DCF Protocol

Mehdad N. SHIRAZI; Oyunchimeg SHAGDAR; Suhua TANG; Masanori NOZAKI; Youiti KADO; Bing ZHANG

doi:10.1093/ietcom/e90-b.3.538

A Reservation-Based Enhancement of IEEE 802.11 DCF Protocol

Mehdad N. SHIRAZI, Oyunchimeg SHAGDAR, Suhua TANG, Masanori NOZAKI, Youiti KADO, Bing ZHANG

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IEEE 802.11 DCF is an asynchronous and distributed MAC protocol which does not require the existence of a central controller for medium access coordination. This flexibility, which is due to DCF's contention-based nature, comes at the expense of the overhead associated with contention resolution. The overhead consists of frame collision time and channel idle time, which is particularly severe when channel is saturated. In this paper, we present an enhancement of DCF which aims at reducing its contention resolution overhead by equipping it with a distributed reservation mechanism. The proposed reservation mechanism enhances collision avoidance mechanism of DCF by enforcing a partially ordered medium access through an implicit agreement between neighboring nodes. Simulation results, using ns-2 network simulator, show that the added reservation scheme 1) effectively reduces DCF's overhead and improves channel utilization particularly when node density and traffic load is high, 2) significantly enhance DCF's fairness.

Publication: IEICE TRANSACTIONS on Communications Vol.E90-B No.3 pp.538-548

Publication Date: 2007/03/01

Publicized

Online ISSN: 1745-1345

DOI: 10.1093/ietcom/e90-b.3.538

Type of Manuscript: PAPER

Category: Network

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Mehdad N. SHIRAZI, Oyunchimeg SHAGDAR, Suhua TANG, Masanori NOZAKI, Youiti KADO, Bing ZHANG, "A Reservation-Based Enhancement of IEEE 802.11 DCF Protocol" in IEICE TRANSACTIONS on Communications, vol. E90-B, no. 3, pp. 538-548, March 2007, doi: 10.1093/ietcom/e90-b.3.538.
Abstract: IEEE 802.11 DCF is an asynchronous and distributed MAC protocol which does not require the existence of a central controller for medium access coordination. This flexibility, which is due to DCF's contention-based nature, comes at the expense of the overhead associated with contention resolution. The overhead consists of frame collision time and channel idle time, which is particularly severe when channel is saturated. In this paper, we present an enhancement of DCF which aims at reducing its contention resolution overhead by equipping it with a distributed reservation mechanism. The proposed reservation mechanism enhances collision avoidance mechanism of DCF by enforcing a partially ordered medium access through an implicit agreement between neighboring nodes. Simulation results, using ns-2 network simulator, show that the added reservation scheme 1) effectively reduces DCF's overhead and improves channel utilization particularly when node density and traffic load is high, 2) significantly enhance DCF's fairness.
URL: https://globals.ieice.org/en_transactions/communications/10.1093/ietcom/e90-b.3.538/_p

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@ARTICLE{e90-b_3_538,
author={Mehdad N. SHIRAZI, Oyunchimeg SHAGDAR, Suhua TANG, Masanori NOZAKI, Youiti KADO, Bing ZHANG, },
journal={IEICE TRANSACTIONS on Communications},
title={A Reservation-Based Enhancement of IEEE 802.11 DCF Protocol},
year={2007},
volume={E90-B},
number={3},
pages={538-548},
abstract={IEEE 802.11 DCF is an asynchronous and distributed MAC protocol which does not require the existence of a central controller for medium access coordination. This flexibility, which is due to DCF's contention-based nature, comes at the expense of the overhead associated with contention resolution. The overhead consists of frame collision time and channel idle time, which is particularly severe when channel is saturated. In this paper, we present an enhancement of DCF which aims at reducing its contention resolution overhead by equipping it with a distributed reservation mechanism. The proposed reservation mechanism enhances collision avoidance mechanism of DCF by enforcing a partially ordered medium access through an implicit agreement between neighboring nodes. Simulation results, using ns-2 network simulator, show that the added reservation scheme 1) effectively reduces DCF's overhead and improves channel utilization particularly when node density and traffic load is high, 2) significantly enhance DCF's fairness.},
keywords={},
doi={10.1093/ietcom/e90-b.3.538},
ISSN={1745-1345},
month={March},}

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TY - JOUR
TI - A Reservation-Based Enhancement of IEEE 802.11 DCF Protocol
T2 - IEICE TRANSACTIONS on Communications
SP - 538
EP - 548
AU - Mehdad N. SHIRAZI
AU - Oyunchimeg SHAGDAR
AU - Suhua TANG
AU - Masanori NOZAKI
AU - Youiti KADO
AU - Bing ZHANG
PY - 2007
DO - 10.1093/ietcom/e90-b.3.538
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E90-B
IS - 3
JA - IEICE TRANSACTIONS on Communications
Y1 - March 2007
AB - IEEE 802.11 DCF is an asynchronous and distributed MAC protocol which does not require the existence of a central controller for medium access coordination. This flexibility, which is due to DCF's contention-based nature, comes at the expense of the overhead associated with contention resolution. The overhead consists of frame collision time and channel idle time, which is particularly severe when channel is saturated. In this paper, we present an enhancement of DCF which aims at reducing its contention resolution overhead by equipping it with a distributed reservation mechanism. The proposed reservation mechanism enhances collision avoidance mechanism of DCF by enforcing a partially ordered medium access through an implicit agreement between neighboring nodes. Simulation results, using ns-2 network simulator, show that the added reservation scheme 1) effectively reduces DCF's overhead and improves channel utilization particularly when node density and traffic load is high, 2) significantly enhance DCF's fairness.
ER -