WiMAX Cell Level Simulation Platform Based on ns-2 and DSP Integration

Flizikowski, Adam; Kozik, Rafał; Gierszal, Henryk; Przybyszewski, Marcin; Hołubowicz, Witold

doi:10.2478/v10177-010-0022-3

Cited by 5 publications

(2 citation statements)

References 6 publications

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“…In the first stage of development it was clear that the (FEC decoder) integration process would be computationally demanding [36]. At that time the available implementation of nbLDPC codes was not optimized for real-time transmission.…”

Section: Link To System (L2s) Interfacementioning

confidence: 99%

Quality of Service and Resource Allocation in WiMAX

Hincapié¹,

Sierra²

2012

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Professor Roberto C. Hincapie received his PhD degree in Telecommunications Engineering from the Universidad Pontificia Bolivariana, Medellin, Colombia in 2009. Currently, he is an Associate Professor at the same university, where he is also the director of GIDATI research group. His current research interests are Wireless Mesh Networks, resource allocation and OFDM wireless technologies such as WiMAX and LTE. He has taught courses in Traffic Engineering, Simulation and Design of Telecommunication systems. He has participated in several publications in indexed journals and addressed a number of key international conferences.Professor Javier E. Sierra received his PhD degree in Telecommunications Engineering from the Universidad Pontificia Bolivariana, Medellin, Colombia in 2009. Currently, he is a professor at the Engineering Department of the same university. He works for GIDATI research group and Universidad Pontificia Bolivariana. He has participated in various national and international conferences (IEEE, ACM), and has received awards, including the award for the best paper presented. He is also an author of several publications in indexed journals. His biography has been included in the book Who's Who in the World, 2010 edition, and Who's Who in Science and Engineering by Marquis Who's Who in the World. His research interests include wireless networks, network optimization, traffic grooming and optical transport networks.

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Section: Link To System (L2s) Interfacementioning

confidence: 99%

Quality of Service and Resource Allocation in WiMAX

Hincapié¹,

Sierra²

2012

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“…The evident challenges in acquiring reliable simulation environment rise from numerous facts related to DaVinci physical layer: computational complexity of nbLDPC decoder, the need of adapting decoder implementation to external cell level simulator requirements (e.g. ns2), requirement for facilitating multiple OFDM subcarriers experiencing different channel conditions.In the first stage of development it was clear that the (FEC decoder) integration process would be computationally demanding[4]. At the time of preparing the paper the DaVinci codes implementation was not optimized for real-time transmission thus the decoding process takes too much time to compute on standard PC.…”

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confidence: 99%

Evaluation of wimax admission control algorithms in mobile voip scenarios with batch arrivals and nbldpc fec

Flizikowski

Przybyszewski

Hołubowicz

2013

Image Processing &Amp; Communications

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This paper presents results of assessing quality of VoIP conversations in WiMAX networks using the nbLDPC (non-binary Low-Density Parity-Check) FEC in mobility scenarios that are based on the real world terrain charactristics around simulated BS. System under test (SUT) is instrumented with three Call Admission Control (CAC) mechanisms (namely EMAC, ARAC and nsc-ARAC). These algorithms are evaluated against controlling the VBR traffic that comes with burst arrivals. The first algorithm relies on calculating simple exponential weighted moving average (EWMA) of the overall resource consumption whereas the other two ARAC algorithms perform calculations discerning between the new, the ongoing and the finishing connections thus providing more accurate resource estimations (but the ARAC tracks the history of requests as well). In order to evaluate their performance authors rely on a cell-level based simulation environment that relies on the cooperative use of well known simulators -ns2 and Matlab. Previous work in the field is enhanced by improving the fidelity of proposed IEEE 802.16 simulator. Authors demonstrate the influence of increasing number of arrivals per one batch as well as testing the "zero hour" scenario (system saturation). In order to include nbLDPC codes in SUT's mobile channels, a method called Link-To-System interface (L2S) has been implemented.

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