Evaluation of guard channel admission control schemes for IEEE 802.16 with integrated nb-LDPC codes

Flizikowski, Adam; Kozik, Rafał; Majewski, Mateusz; Przybyszewski, Marcin

doi:10.1109/icumt.2009.5345468

Cited by 8 publications

(7 citation statements)

References 19 publications

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“…Quality of Service and Resource Allocation in WiMAX 16 Fig. 6. Flowchart of the scheduling algorithm (Wu, 2010).…”

Section: Edf and Connection Admission Control (Cac) Schemementioning

confidence: 99%

“…2. The 802.16 protocol stack [6] WiMAX MAC is subdivided into three sub layers with different functionalities. Figure 2 is a basic illustration of the tasks and services that the MAC sub layers are responsible for.…”

Section: Wimax Standardmentioning

confidence: 99%

“…In the MAC layer, one challenge is the diversified service types, which requires the WiMAX scheduling scheme to be adaptive to the various QoS parameters of different service types. There have been some studies of the WiMAX MAC scheduling problem [3], [4], [5], and [6].…”

Section: Problem Statementmentioning

confidence: 99%

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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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“…Quality of Service and Resource Allocation in WiMAX 16 Fig. 6. Flowchart of the scheduling algorithm (Wu, 2010).…”

Section: Edf and Connection Admission Control (Cac) Schemementioning

confidence: 99%

Section: Wimax Standardmentioning

confidence: 99%

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Quality of Service and Resource Allocation in WiMAX

Hincapié¹,

Sierra²

2012

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“…In this paper the authors intend to propose a comprehensive test methodology to evaluate influence of call admission control algorithms deployed for WiMAX on system with DaVinci FEC coding scheme. Previous work has already dealt with performance of DaVinci codes by performing cell level simulations using ns2 simulator with VIMACCS patch [1,3]. Although key assumption and constraint of the mentioned simulation platform was the use of AWGN channel and no support for sub-carrier effective SIN R modelling.…”

Section: Introductionmentioning

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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“…The outcome was the development of VIMACCS patch which includes mechanisms for Connection Admission Control deployed for cell level simulation. Implemented and evaluated CAC algorithms for nbLDPC codes included Complete Sharing CAC (CSCAC), Dynamic Hierarchical CAC (DHCAC) and Fair CAC (FCAC) [3] [6].…”

Section: Link To System (L2s) Interfacementioning

confidence: 99%