Filters








397 Hits in 6.3 sec

Performance Evaluation and Traffic Modeling [chapter]

Hans van den Berg, Thomas M. Bohnert, Orlando Cabral, Dmitri Moltchanov, Dirk Staehle, Fernando Velez
2009 Lecture Notes in Electrical Engineering  
The first part presents models for evaluating the impact of flow-level traffic dynamics in large-scale wireless networks.  ...  Models dealing with flow-level performance are presented in Section 3.2.1, and Section 3.2.2 focuses on packet-level models.  ...  with respect to the relative performance impact of a set of key system, environment, and traffic-related aspects.  ... 
doi:10.1007/978-0-387-85573-8_3 fatcat:47tdrgbgbrgotefaeg76jodfou

HSDPA Performance in Live Networks

M. Jurvansuu, J. Prokkola, M. Hanski, P. Perala
2007 2007 IEEE International Conference on Communications  
We verify that HSDPA delay is substantially smaller than with WCDMA, as well as the occurrence of delay spikes caused by link level retransmissions.  ...  We evaluate and compare live HSDPA operational network performance from the end-user perspective, especially related to Voice over IP and web browsing applications.  ...  Harri Holma from Nokia and Dr. Kostas Pentikousis, Dr. Martin Varela from VTT for commenting this work.  ... 
doi:10.1109/icc.2007.83 dblp:conf/icc/JurvansuuPHP07 fatcat:4c54hgvykvdgpna3rr5oyvzsai

Effect of TNL Flow Control Schemes for the HSDPA Network Performance

Thushara Weerawardane, Andreas Timm-Giel, Carmelita Görg, Gennaro C. Malafronte, Stephan Hauth
2009 Journal of Communications  
HSDPA (High Speed Downlink Packet Access) is an extension of the current UMTS (Universal Mobile Telecommunications System) technology with the objective to increase the data rate and to reduce the latency  ...  : The better bandwidth utilisation and improved statistical multiplexing is achieved by reducing the burstiness of the traffic over the Iub interface.  ...  The impact of the TNL network on the performance of UMTS, HSDPA and HSUPA are the key research area [2, 5, 13, 14, 19, 20, 21, 22, 23] of these projects.  ... 
doi:10.4304/jcm.4.2.78-88 fatcat:4ciwmbrmabb4bpkojsx5efcdi4

Comparative Performance Study of LTE Downlink Schedulers

Arkadiusz Biernacki, Kurt Tutschku
2013 Wireless personal communications  
The evaluation takes place in mixed traffic scenarios and aims at exploring strengths and weaknesses of the proposed algorithms.  ...  Simulation results illustrate the importance of real-time traffic awareness by schedulers when a specified level of quality of service is required.  ...  The above defined metrics describe the user-level performance in the case when the offered traffic consists of elastic and non-elastic flows.  ... 
doi:10.1007/s11277-013-1308-4 fatcat:4nyrl7xoenh5jdniqkuverxmle

Spatial and Temporal Fairness in Heterogeneous HSDPA-Enabled UMTS Networks

Andreas Mäder, Dirk Staehle
2009 EURASIP Journal on Wireless Communications and Networking  
The system performance of an integrated UMTS network with both High-Speed Downlink Packet Access users and Release '99 QoS users depends on many factors like user location, number of users, interference  ...  We investigate the relation between throughput, volume-based user behavior and traffic dynamics with a simulation framework which allows the efficient modeling of large UMTS networks with both HSDPA and  ...  The scheduler in the NodeB has a large influence on the user-level and system-level performance of the HSDPA.  ... 
doi:10.1155/2009/682368 fatcat:76j3czb66rglpmgbjjxvajbqry

Flow-level performance of intra-site coordination in cellular networks

Ahlem Khlass, Thomas Bonald, Salah-Eddine Elayoubi
2013 International Symposium on Modeling and Optimization in Mobile, Ad-Hoc and Wireless Networks  
Through the analysis of a flow-level model, we show that this scheme indeed improves cell-edge throughput at low loads but may make the system unstable at high loads, due to the suboptimal allocation of  ...  Results show that this dynamic scheme behaves like the static one at low loads, outperforms it at medium loads and preserves the stability region of the network at high loads.  ...  However, they do not capture the dynamic aspect of traffic, which is critical for coordination schemes (see point 2) of the dilemma above).  ... 
dblp:conf/wiopt/KhlassBE13 fatcat:d45d35uehbcrfju4qhxuhrwlme

An Enhanced Buffer Management Scheme for Multimedia Traffic in HSDPA [article]

Suleiman Y. Yerima, Khalid Al-Begain
2016 arXiv   pre-print
Hence in this paper we present the end-to-end performance study of a proposed RAN buffer management scheme for multi-flow sessions via dynamic system-level HSDPA simulations.  ...  As a result, packet switched sessions with multiple diverse traffic flows such as concurrent voice and data, or video and data being transmitted to the same user are a likely commonplace cellular packet  ...  HSDPA simulation Model A system level HSDPA simulation model was developed in C++ to evaluate performance of the enhanced TSP scheme.  ... 
arXiv:1608.00855v1 fatcat:6rxq5khvunburixktyoc5faehm

Handover Performance in Mobile WIMAX Networks

2016 International Journal of Science and Research (IJSR)  
ACKNOWLEDGMENTS This Master's thesis was carried out in the iCONS group of the University of South Florida.  ...  Security of mobile WiMAX is handled by a privacy sublayer within the MAC layer. The key aspects of WiMAX security [24] are as follow.  ...  The goal is to find out which parameters have the significant impact on the handover performance.  ... 
doi:10.21275/v5i6.nov164380 fatcat:gtqczzovtvg5nlrqaqmphbavi4

Effect of the Feedback Function on the QoS in a Time Space Priority with Active Queue Management [article]

Mohamed Hanini, Said El Kafhali, Abdelkrim Haqtq, Amine Berqta
2013 arXiv   pre-print
achieves higher QoS for the NRT packets in the system.  ...  The basic idea behind an active queue management (AQM) is to sense the congestion level within the network and inform the packet sources about, so that they reduce their sending rate.  ...  Laverman, "HSDPA flow level performance: the impact of key system and traffic aspects". MSWiM-04, Venice, Italy.2004. [25] S.Y.Yerima and K.  ... 
arXiv:1304.3258v1 fatcat:jogtvb5jjbfqvowrtlf4tczrma

Impact of Inter-cell Interference on Flow Level Performance of Scheduling Schemes for the UMTS EUL

D. C. Dimitrova, G. Heijenk, J. L. van den Berg, R. Litjens
2008 2008 IEEE International Conference on Wireless and Mobile Computing, Networking and Communications  
A key mechanism in EUL traffic handling is the packet scheduler, for which a number of basic schemes can be identified (one-byone, partial parallel, and full parallel).  ...  This approach takes into account both the packet-level characteristics and the flow-level dynamics due to the random user behaviour.  ...  Analytical studies on EUL performance capturing both the packet and flow level dynamics of the system are rare. Interesting references here are [10] and [11] .  ... 
doi:10.1109/wimob.2008.107 dblp:conf/wimob/DimitrovaHBL08 fatcat:ctsmhpcue5eyvaq7gvzgndirlq

Obtaining in-context measurements of cellular network performance

Aaron Gember, Aditya Akella, Jeffrey Pang, Alexander Varshavsky, Ramon Caceres
2012 Proceedings of the 2012 ACM conference on Internet measurement conference - IMC '12  
Our analysis of 1650 measurements gathered from 12 volunteer devices shows that the system is able to obtain average throughput measurements that accurately quantify the performance experienced during  ...  Network service providers, and other parties, require an accurate understanding of the performance cellular networks deliver to users.  ...  ACKNOWLEDGEMENTS We would like to thank our 12 volunteers for running our measurement system on their mobile devices. This work is partially supported by a grant from the NSF.  ... 
doi:10.1145/2398776.2398807 dblp:conf/imc/GemberAPVC12 fatcat:jcsyjz4w2vcthale5jcbofskzi

Wireless data performance in multi-cell scenarios

T. Bonald, S. Borst, N. Hegde, A. Proutiére
2004 Proceedings of the joint international conference on Measurement and modeling of computer systems - SIGMETRICS 2004/PERFORMANCE 2004  
We thus derive bounds and approximations for key performance metrics like the number of active flows, transfer delays, and flow throughputs in the various cells.  ...  In the present paper we investigate the flow-level performance in networks with multiple base stations.  ...  Such rate changes, therefore, are expected to have a significant impact on the flow-level performance.  ... 
doi:10.1145/1005686.1005730 dblp:conf/sigmetrics/BonaldBHP04 fatcat:if5ej63pcrb2bj4nqbioatynlu

Dynamic Buffer Management for Multimedia QoS in Beyond 3G Wireless Networks [article]

Suleiman Y. Yerima, Khalid Al-Begain
2016 arXiv   pre-print
The impact of the scheme on end-to-end traffic performance is evaluated with an example multimedia session comprising a real-time streaming flow concurrent with TCP-based non real-time flow.  ...  Unlike earlier systems, UMTS-evolved systems from HSDPA and beyond incorporate mechanisms such as packet scheduling and HARQ in the base station necessitating data buffering at the air interface.  ...  Additionally, support for multimedia services/applications with different classes of media/flows is a key requirement of the UMTS-HSDPA system [1] , [3] , [6] .  ... 
arXiv:1610.05184v1 fatcat:ixk5ckreovflnmywsyrpam5s54

Performance analysis of access selection and transmit diversity in multi-access networks

Fredrik Berggren, Remco Litjens
2006 Proceedings of the 12th annual international conference on Mobile computing and networking - MobiCom '06  
A number of numerical experiments are included in order to quantify the relative contribution of the distinguished aspects to the performance gain.  ...  Scenarios with persistent and non-persistent data flows are investigated, concentrating on throughput and transfer time performance, respectively.  ...  The views expressed in this paper are solely those of the authors and should not be interpreted as necessarily representing the views of their employers or the Ambient Networks project.  ... 
doi:10.1145/1161089.1161118 dblp:conf/mobicom/BerggrenL06 fatcat:cxuout7sh5a2jaa7i5hptrxe54

Real-time HSPA emulator for end-to-edge QoS evaluation in all-IP beyond 3G heterogeneous wireless networks

Miguel López-Benítez, Francisco Bernardo, Nemanja Vucevic, Anna Umbert
2008 Proceedings of the First International ICST Conference on Simulation Tools and Techniques for Communications Networks and Systems  
Some illustrative results, showing the capabilities of the developed tool, are also presented and analyzed.  ...  well as the proposed endto-edge Quality of Service (QoS) management techniques developed for all-IP beyond 3G heterogeneous wireless networks in the context of the AROMA project.  ...  Although this section has focused on the UUT performance, many global system performance aspects can also be analyzed with the developed tool.  ... 
doi:10.4108/icst.simutools2008.3039 dblp:conf/simutools/Lopez-BenitezBVU08 fatcat:j5l7fum5xfc3hcwhp4wly2uoee
« Previous Showing results 1 — 15 out of 397 results