Search results for "Carrier-sense multiple access"

showing 2 items of 2 documents

Remarks on IEEE 802.11 DCF performance analysis

2005

This letter presents a new approach to evaluate the throughput/delay performance of the 802.11 distributed coordination function (DCF). Our approach relies on elementary conditional probability arguments rather than bidimensional Markov chains (as proposed in previous models) and can be easily extended to account for backoff operation more general than DCF's one.

Computer scienceMarkov processThroughputDistributed coordination functionCarrier-sense multiple accesssymbols.namesakeIEEE 802.11Wireless lanComputer Science::Networking and Internet ArchitectureElectrical and Electronic EngineeringThroughput (business)IEEE 802.11Markov chainSettore ING-INF/03 - Telecomunicazionibusiness.industryComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKSComputer Science ApplicationsComputer Science::PerformanceModeling and SimulationMultiple access controlPerformance evaluationsymbolsIEEE 802.11; Multiple access control; Performance evaluationbusinessAlgorithmComputer networkIEEE Communications Letters
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Optimal Resource Allocation in Multi-Hop Networks: Contention vs. Scheduling

2014

CSMA/CA (Carrier Sense Multiple Access/Collision Avoidance) is actually the most used method in ad-hoc networks for transmitting on a contending medium, even if it shows poor performance in presence of hidden nodes. To increase performance, we propose an algorithm that combines CSMA and TDMA (Time Division Multiple Access) approaches. The adopted solution consists of grouping contending nodes in non-interfering subsets and granting a different numbers of time slots to different groups, while using the CSMA to manage medium access among nodes belonging to the same subset. An optimization procedure to assign the time slots to each subset of nodes and to find an equilibrium between contention …

resource allocation; multi hop neworksSettore ING-INF/03 - TelecomunicazioniComputer sciencebusiness.industryDistributed computingMulti-frequency time division multiple accessComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKSTime division multiple accessresource allocationComputer Science Applications1707 Computer Vision and Pattern Recognitionmulti hop neworksHop (networking)Carrier-sense multiple accessScheduling (computing)resource allocation multi hop neworksComputer Networks and CommunicationSettore ING-INF/04 - AutomaticaControl and Systems EngineeringChannel access methodbusinessInformation SystemsComputer network
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