Name
Title | ||
|---|---|---|
Efficient Back-off Mechanism for Multimedia Support in 802.11e EDCA Wireless Ad-Hoc Networks |
Abstract | ||
|---|---|---|
This paper presents an effective back-off mechanism to improve quality of service (QoS) for multimedia applications over the IEEE 802.11e enhanced distribution channel access (EDCA) standard. It can be done with proposed algorithm called dynamic fast adaptation for contention-based EDCA (DFA-EDCA) mechanism. The main concept of proposed DFA-EDCA mechanism is to use the exponential functions to adaptively tune the back-off parameters in IEEE 802.11e EDCA according to the changes on a network load within a short period. In this proposed mechanism an intra-access category (intra-AC) differentiation mechanism is provided to increase its back-off time randomly and achieve discrimination of same priority traffic on different stations. The performance evaluations have been conducted by using Network Simulator (NS-2). The simulation results show that the proposed DFA-EDCA mechanism has greatly outperformed the previous mechanisms such as non-linear dynamic adaptation scheme of the minimum contention window (CWmin-HA), dynamic adaptation algorithm of the maximum contention window (CWmax-adaptation), adaptive enhanced distributed coordination function and the conventional EDCA in terms of goodput, gain of goodput, packet delay, collision rate and channel utilization ratio (CUR). It has significantly reduced both packet delay and collision rate simultaneously together with an obviously increment in both goodput and CUR, which lead to the improvement in QoS for multimedia applications. |
Year | DOI | Venue |
|---|---|---|
2013 | 10.1007/s11277-012-0823-z | Wireless Personal Communications |
Keywords | Field | DocType |
multimedia support,proposed dfa-edca mechanism,conventional edca,packet delay,multimedia application,effective back-off mechanism,differentiation mechanism,previous mechanism,edca wireless ad-hoc networks,contention-based edca,collision rate,efficient back-off mechanism,proposed mechanism | IEEE 802.11e-2005,Computer science,Network packet,Quality of service,Network simulation,Computer network,Communication channel,Real-time computing,Distributed coordination function,Wireless ad hoc network,Goodput,Multimedia | Journal |
Volume | Issue | ISSN |
71 | 1 | 1572-834X |
Citations | PageRank | References |
5 | 0.61 | 13 |
Authors | ||
4 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Aws Ali Shakir | 1 | 5 | 0.61 |
| Chee Kyun Ng | 2 | 105 | 16.30 |
| Nor K. Noordin | 3 | 47 | 2.58 |
| Alyani Ismail | 4 | 38 | 5.71 |