Search results for "Frequency allocation"

showing 8 items of 8 documents

Joint Usage of Dynamic Sensitivity Control and Time Division Multiple Access in Dense 802.11ax Networks

2016

It is well known that in case of high density deployments, Wi-Fi networks suffer from serious performance impairments due to hid- den and exposed nodes. The problem is explicitly considered by the IEEE 802.11ax developers in order to improve spectrum efficiency. In this pa- per, we propose and evaluate the joint usage of dynamic sensitivity con- trol (DSC) and time division multiple access (TDMA) for improving the spectrum allocation among overlapping 802.11ax BSSs. To validate the solution, apart from simulation, we used a testbed based on the Wireless MAC Processor (WMP), a prototype of a programmable wireless card.

Computer scienceReal-time computingTime division multiple access050801 communication & media studies02 engineering and technologyFrequency allocation0508 media and communications0202 electrical engineering electronic engineering information engineeringWirelessDense deploymentIEEE 802.11axHidden node problembusiness.industryExposed node problemSettore ING-INF/03 - TelecomunicazioniDynamic sensitivity control05 social sciencesTestbedSpectral efficiencyExposed node problemIEEE 802.11axTDMA020201 artificial intelligence & image processingHidden node problembusinessComputer network
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Analysis of interference avoidance with load balancing in heterogeneous cellular networks

2016

In heterogeneous cellular networks (HCNets) smallcells are overlaid with macro-cells to handle heavy cellular data traffic in an efficient way. To achieve fast and reliable access to data with a better coverage it is necessary to offload users to the underutilized small-cells from the congested macro-cells. Sharing of the same licensed frequency spectrum by smallcells and macro-cells results in heavy cross-tier interference which significantly affects the downlink SINR. In this paper, we investigate and analyze a joint frequency-division duplex based cross-tier complementary spectrum sharing technique which is also regarded as reverse frequency allocation (RFA) scheme with load balancing. T…

Computer sciencebusiness.industryComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS05 social sciencesDuplex (telecommunications)050801 communication & media studies020206 networking & telecommunications02 engineering and technologySpectral efficiencyLoad balancing (computing)Frequency allocation0508 media and communicationsTelecommunications link0202 electrical engineering electronic engineering information engineeringCellular networkbusinessComputer network2016 IEEE 27th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)
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A novel frequency reuse scheme for coordinated multi-point transmission

2010

La transmisión multipunto coordinada (CoMP) se considera en 3GPP LTE-Advanced como una técnica clave para mejorar el rendimiento en el borde de la célula. Con el fin de apoyar la asignación conjunta de asignación de recursos entre células coordinadas en sistemas CoMP, es necesario diseñar esquemas eficientes de reutilización de frecuencias. Sin embargo, la mayoría de los esquemas de reutilización de frecuencias existentes no son adecuados para transmisión CoMP debido a que no consideran el escenario de transmisión conjunta multicelular en su regla de reutilización de frecuencias. Para resolver este problema, en este trabajo se propone un esquema de reutilización de frecuencias que divide el…

Engineering:CIENCIAS TECNOLÓGICAS [UNESCO]business.industryOrthogonal frequency-division multiplexingDistributed computingReal-time computingcoordinated multi-point transmissionUNESCO::CIENCIAS TECNOLÓGICASBlocking (statistics)Frequency allocationLTE AdvancedTransmission (telecommunications)LTE-AdvancedTelecommunications linkResource allocationbusinessThroughput (business)frequency reuseOFDM
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Decoupled Downlink-Uplink Coverage Analysis with Interference Management for Enriched Heterogeneous Cellular Networks

2016

Heterogeneous cellular networks (HetCNets) offer a promising solution to cope with the current cellular coverage crunch. Due to the large transmit power disparity, while following maximum power received (MPR) association scheme, a larger number of users are associated with macro-cell BS (MBS) than small-cell BSs (SBSs). Therefore, an imbalance load arrangement takes place across the HetCNets. Hence, using cell range expansion-based cell association, we can balance the load across the congested MBS. However, using MPR association scheme, users’ offloading leads to two challenges: 1) macro-cell interference , in which the MBS interferes with the offloaded users, and 2) coupled downlink-uplink…

Heterogeneous cellular networksGeneral Computer ScienceComputer science02 engineering and technologyInterference (wave propagation)Frequency allocationsmall-cell BSsLoad managementBase stationcoverage performance0203 mechanical engineeringTelecommunications linkreverse frequency allocation0202 electrical engineering electronic engineering information engineeringGeneral Materials Sciencedecoupled downlink-uplink associationbusiness.industryGeneral Engineering020302 automobile design & engineering020206 networking & telecommunicationsTransmitter power outputCellular networklcsh:Electrical engineering. Electronics. Nuclear engineeringbusinesslcsh:TK1-9971Computer networkIEEE Access
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Analysis of load balancing and interference management in heterogeneous cellular networks

2017

To meet the current cellular capacity demands, proactive offloading is required in heterogeneous cellular networks (HetCNets) comprising of different tiers of base stations (BSs), e.g., small-cell BSs (sBSs) and conventional macro-cell BSs (mBSs). Each tier differs from the others in terms of BS transmit power, spatial density, and association bias. Consequently, the coverage range of each tier BSs is also different from others. Due to low transmit power, a fewer number of users are associated to an sBS as compared with mBS. Thus, inefficient utilization of small-cell resources occurs. To balance the load across the network, it is necessary to push users to the underloaded small cells from …

Heterogeneous cellular networksGeneral Computer ScienceComputer science02 engineering and technologyselective sBS deploymentFrequency allocationBase stationLoad managementsmall-cell BSs0203 mechanical engineering0202 electrical engineering electronic engineering information engineeringreverse frequency allocationGeneral Materials ScienceNetwork performanceuser ratebusiness.industrycoverage probabilityGeneral Engineering020302 automobile design & engineering020206 networking & telecommunicationsLoad balancing (computing)Transmitter power outputCellular networklcsh:Electrical engineering. Electronics. Nuclear engineeringbusinesslcsh:TK1-9971Computer network
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A CAPWAP-Compliant Solution for Radio Resource Management in Large-Scale 802.11 WLAN

2007

Recently, the impressive success of the IEEE 802.11 WLAN technology has dramatically changed the role of the wireless connectivity provisioning. Born as a wireless extension of small office or home networks, todays the WLANs are getting more and more popular as a large, even metropolitan, area networks. The deployment of large-scale WLANs has some critical issues, because of the lack of coordinated management functionalities among the network nodes. In this paper we briefly describe the CAPWAP architectural solution, for centralizing some control and maintenance functionalities in large scale WLAN, by guaranteeing the interoperability between network nodes provided by different vendors. We …

Network administratorSettore ING-INF/03 - TelecomunicazioniComputer sciencebusiness.industryWireless networkNode (networking)ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKSTestbedInteroperabilityProvisioningMetropolitan areaCAPWAPFrequency allocationWireless lanResource allocationWirelessRadio resource managementCentralized signal controlInteroperability Large scale systems Radio communication Resource allocationbusinessComputer networkIEEE GLOBECOM 2007-2007 IEEE Global Telecommunications Conference
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Energy-Efficient Resource Allocation and User Scheduling for Collaborative Mobile Clouds With Hybrid Receivers

2016

In this paper, we study the resource allocation and user scheduling algorithm for minimizing the energy cost of data transmission in the context of OFDMA collaborative mobile cloud (CMC) with simultaneous wireless information and power transfer (SWIPT) receivers. The CMC, which consists of several collaborating MTs offers one potential solution for downlink con- tent distribution and for the energy consumption reduction at the terminal side. Meanwhile, as RF signal can carry both informa- tion and energy simultaneously, the induced SWIPT has gained much attention for energy efficiency design of mobile nodes. Previous work on the design of CMC system mainly focused on the cloud formulation o…

Optimization problemComputer Networks and CommunicationsComputer scienceDistributed computingresource allocationAerospace EngineeringCloud computing02 engineering and technology7. Clean energyScheduling (computing)Frequency allocation0203 mechanical engineeringTelecommunications link0202 electrical engineering electronic engineering information engineeringWirelessElectrical and Electronic Engineeringta113collaborative mobile cloudscontent distributionbusiness.industryuser scheduling020302 automobile design & engineering020206 networking & telecommunicationsEnergy consumptionpower allocationuser cooperationgreen communicationsAutomotive EngineeringConvex optimizationResource allocationsubchannel allocationbusinessEfficient energy useIEEE Transactions on Vehicular Technology
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Spectrum Hole Detection for Cognitive Radio through Energy Detection using Random Forest

2020

The growth of wireless data is the major driving force for an exponential increase in wireless communication. Cognitive Radio is one of the emerging wireless technologies that can be used for smart utility networks. Optimum utilization of the wireless spectrum is the objective of Cognitive Radio. Finding a spectrum hole through intelligent means is essential for the success of Cognitive Radio. Dynamic spectrum allocation is also an efficient technique for spectrum allocation. It will lead to a better spectrum utilization. In this paper, some of the machine learning techniques are used to find a frequency range for dynamic spectrum allocation. Different machine learning techniques such as Lo…

Support vector machineCognitive radioComputer sciencebusiness.industryReal-time computingBandwidth (signal processing)Range (statistics)WirelessbusinessEnergy (signal processing)Random forestFrequency allocation2020 International Conference for Emerging Technology (INCET)
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