Search results for "IEEE 802.11e-2005"

showing 4 items of 14 documents

Understanding 802.11e contention-based prioritization mechanisms and their coexistence with legacy 802.11 stations

2005

The IEEE 802.11e task group has reached a stable consensus on two basic contention-based priority mechanisms to promote for standardization: usage of different arbitration interframe spaces and usage of different minimum/maximum contention windows. The goal of this article is to provide a thorough understanding of the principles behind their operation. To this purpose, rather than limit our investigation to high-level (e.g. throughput and delay) performance figures, we take a closer look at their detailed operation, also in terms of low-level performance metrics (e.g., the probability of accessing specific channel slots). Our investigation on one hand confirms that AIFS differentiation prov…

PrioritizationStandardsStandardizationComputer Networks and CommunicationsComputer sciencePerformanceThroughputCommunication channels (information theory)Quality of serviceLimit (music)Service differentiationNetwork protocolsSettore ING-INF/03 - Telecomunicazionibusiness.industryInter frameIEEE 802.11eTelecommunication trafficProbability distributionsNetwork protocols; Performance; Probability distributions; Quality of service; Standards; Telecommunication traffic; Enhanced distributed channel access; IEEE 802.11e; Service differentiation; Communication channels (information theory)Hardware and ArchitectureArbitrationEnhanced distributed channel accessIEEE 802.11e-2005businessSoftwareInformation SystemsCommunication channelComputer network
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An energy analysis of IEEE 802.15.6 scheduled access modes

2010

Body Area Networks (BANs) are an emerging area of wireless personal communications. The IEEE 802.15.6 working group aims to develop a communications standard optimised for low power devices operating on, in or around the human body. IEEE 802.15.6 specifically targets low power medical application areas. The IEEE 802.15.6 draft defines two main channel access modes; contention based and contention free. This paper examines the energy lifetime performance of contention free access and in particular of periodic scheduled allocations. This paper presents an overview of the IEEE 802.15.6 and an analytical model for estimating the device lifetime. The analysis determines the maximum device lifeti…

Settore ING-INF/03 - TelecomunicazioniComputer scienceInter-Access Point Protocolbusiness.industryPhysical layerbiomedical communication body area networks personal area networksIEEE 802.15.6 scheduled access modes body area network channel access modes communications standard device lifetime estimation energy analysis energy lifetime performance human body low power devices low power medical application areas periodic scheduled allocation wireless personal communicationTelecommunications linkBody area networkWirelessIEEE 802.11e-2005TransceiverbusinessIEEE 802.15IEEE 802.11r-2008Computer network2010 IEEE Globecom Workshops
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WiSHFUL : enabling coordination solutions for managing heterogeneous wireless networks

2017

The paradigm shift toward the Internet of Things results in an increasing number of wireless applications being deployed. Since many of these applications contend for the same physical medium (i.e., the unlicensed ISM bands), there is a clear need for beyond-state-of-the-art solutions that coordinate medium access across heterogeneous wireless networks. Such solutions demand fine-grained control of each device and technology, which currently requires a substantial amount of effort given that the control APIs are different on each hardware platform, technology, and operating system. In this article an open architecture is proposed that overcomes this hurdle by providing unified programming i…

Wi-Fi arrayComputer Networks and Communicationsbusiness.industryWireless networkComputer scienceInter-Access Point ProtocolSettore ING-INF/03 - Telecomunicazioni020208 electrical & electronic engineering020206 networking & telecommunications02 engineering and technologyComputer Science Applications0202 electrical engineering electronic engineering information engineeringWirelessOverhead (computing)IBCNIEEE 802.11e-2005Electrical and Electronic EngineeringOpen architectureUnified programming interfaces network control radio control wishful projectbusinessIEEE 802.11sComputer network
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Temporal Fairness Provisioning in Multi-Rate Contention-Based 802.11e WLANs

2005

The IEEE 802.11e extensions for QoS support in WLAN define the transmission opportunity (TXOP) concept, in order to limit the channel holding times of the contending stations in the presence of delay-sensitive traffic. We evaluate the use of TXOP for a different purpose: "temporal fairness" provisioning among stations employing different data rates. We show that the equalization of the channel access times allows each station to obtain its throughput basically (1) proportional to its transmission rate, and (2) independent of the transmitted frame length. This also improves the aggregate throughput of the overall WLAN. For a given TXOP limit, i.e., a granted channel access time, a station is…

business.industryComputer scienceQuality of serviceComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKSReal-time computingFrame (networking)ComputingMilieux_PERSONALCOMPUTINGWireless local area networks (WLAN)ProvisioningThroughputThroughputIEEE 802.11e-2005Limit (mathematics)businessadaptation schemeAccess timeCommunication channelComputer networkSixth IEEE International Symposium on a World of Wireless Mobile and Multimedia Networks
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