The following information was submitted:
Transactions: WSEAS TRANSACTIONS ON SYSTEMS
Transactions ID Number: 53-200
Full Name: Nidal Al-Dmour
Position: Assistant Professor
Age: ON
Sex: Male
Address: computer Engineering Department, Faculty of Engineering, Mutah University
Country: JORDAN
Tel: 00962797050705
Tel prefix:
Fax:
E-mail address: nidal@mutah.edu.jo
Other E-mails:
Title of the Paper: novel mechanisms for quality of service improvements in wireless ad hoc networks
Authors as they appear in the Paper: Mohammad S. Saraireh and Nidal A. Al-Dmour
Email addresses of all the authors: m_srayreh@mutah.edu.jo,nidal@mutah.edu.jo
Number of paper pages: 14
Abstract: This paper proposes two mechanisms for improving the IEEE 802.11 DCF protocol performance and for enhancing QoS in IEEE 802.11 wireless LANs. These are Ratio based and Collision Rate Variation (CRV) schemes. The Ratio based scheme uses the collision rate value of the current and the past history of the network conditions to adaptively adjust the Contention Window (CW) size for each individual station. The CRV scheme also employs the collision rate and collision rate variation values to adjust the CW value locally for each individual station based on the current and previous network conditions. The aim of developing these approaches is to reduce the probability of collisions among the contending stations in a heavily loaded network in an attempt to improve QoS in IEEE 802.11 DCF protocol. The proposed schemes are evaluated and compared with the conventional IEEE 802.11 DCF and the Exponential Increase Exponential Decrease (EIED) schemes. The evaluation is carried ou!
t for different scenarios (i.e. different traffic load and different network size) using the ns-2 simulator. The metrics used in the evaluation are delay, jitter, throughput, packet loss, protocol efficiency, and collision rate. The results indicate that the best performance is achieved by using the proposed scheme with superiority for the CRV scheme in most cases. EIED scheme is also able to provide better performance than the IEEE 802.11 DCF scheme. The simulation results from several scenarios confirmed that the proposed approach showed better performance than the legacy IEEE 802.11 DCF and EIED schemes in all scenarios. The Ratio based and CRV schemes maintained better performance than the IEEE 802.11 DCF and EIED schemes.
Keywords: Quality of service (QoS), IEEE 802.11 MAC protocol, Network simulator, Contention sindow (CW), Distributed Coordination Function (DCF), and Wireless Networks.
EXTENSION of the file: .doc
Special (Invited) Session:
Organizer of the Session:
How Did you learn about congress: Wireless Ad hoc Networks
IP ADDRESS: 79.173.208.32
