Search results for "IEEE 802.11w-2009"

showing 3 items of 3 documents

Assessing the effectiveness of IEEE 802.11e in multi-hop mobile network environments

2004

The IEEE 802.11e technology is receiving much interest due to the promising enhancements it offers to wireless local area networks in terms of QoS support. Until now, research has focused on single hop, access point based environments, which are the most common. We review the enhancements proposed in the last IEEE 802.11e draft (version 8.0). We analyze the performance of the IEEE 802.11e protocol on ad-hoc networks (multi-hop) in terms of throughput and end-to-end delay. We also measure the effectiveness for static and fully dynamic networks with a variable number of source stations. Finally, we analyze the performance of IEEE 802.11e when legacy IEEE 802.11 stations (no IEEE 802.11e suppo…

IEEE 802.11uIEEE 802IEEE 802.11w-2009business.industryComputer scienceInter-Access Point ProtocolDistributed computingComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKSIEEE 802.11b-1999IEEE 802.1XbusinessIEEE 802.11sComputer networkIEEE 802.11r-2008
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QoS Support for Time-Constrained Multimedia Communications in IEEE 802.11 WLANs: A Performance Evaluation

2005

During the past few years, we have been witnessing the massive deployment of IEEE 802.11 wireless LANs. Even though the widespread deployment of such wireless LANs, many studies are still underway aiming to design and develop simple yet effective QoS mechanisms for supporting time-constrained services over such platforms. In this paper, we first overview five different QoS mechanisms recently introduced in the literature as well as the upcoming IEEE 802.11e (EDCA) standard. We then carry out a comparative performance evaluation of all the QoS mechanisms. We focus our study on the effectiveness of the various QoS mechanisms for supporting time-constrained services.

IEEE 802.11uIEEE 802IEEE 802.11w-2009business.industryInter-Access Point ProtocolComputer scienceComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKSWireless Multimedia ExtensionsMobile QoSIEEE 802.11e-2005businessTelecommunicationsComputer networkIEEE 802.11r-20082005 Systems Communications (ICW'05, ICHSN'05, ICMCS'05, SENET'05)
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WINSE: WiMAX NS-2 extension

2009

IEEE 802.16 standard defines the wireless broadband technology called WiMAX. When compared to other wireless technologies, it introduces many interesting advantages at PHY, MAC, and QoS layers. Heavy simulations are needed to study IEEE 802.16 performance and propose further enhancements to this standard. Link level simulations are not always sufficient, while system level simulators are not always accurate to capture MAC and transport protocol details. We implemented a 802.16 extension for the NS-2 network simulator. It includes upper PHY modeling, almost all the features of the 802.16 MAC layer, as well as the QoS framework. This article describes the implemented features, simulation meth…

Wireless broadbandIEEE 802.11w-2009Computer sciencebusiness.industryInter-Access Point ProtocolQuality of serviceComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKSLink levelIEEE 802.1XNetwork allocation vectorbusinessWiMAXComputer networkProceedings of the Second International ICST Conference on Simulation Tools and Techniques
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