Novel GPRS simulator for testing MAC protocols

Graja, H.; Perry, Philip; Todinca, Doru; Murphy, John

doi:10.1049/cp:20030406

Cited by 4 publications

(1 citation statement)

References 12 publications

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“…In this work we focus on General Packet Radio Service (GPRS) [1,2], and on Enhanced GPRS (EGPRS) [5], but the resource allocation algorithms that we are developing can be also applied to other cellular data networks. In [13], [3], we have investigated different algorithms used for transmission control, while in this work we focus on the admission control problem, proposing a new admission control algorithm for GPRS/EGPRS networks.…”

Section: Introductionmentioning

confidence: 99%

Novel admission control algorithm for GPRS/EGPRS based on fuzzy logic

Todinca

Graja

Perry

et al. 2004

Fifth IEE International Conference on 3G Mobile Communication Technologies (3G 2004) the Premier Technical Conference for 3G An

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As users in a GPRS/EGPRS network have different Quality of Service (QoS) demands, the network aims to satisfy their demands while maximizing the utilization of the existing resources. A crucial aspect of the resource allocation problem in cellular data networks is the admission control (AC). We propose a new session admission control algorithm that overcomes most of the difficulties encountered by the existing AC algorithms. The novelty of our approach is the use of fuzzy logic (fuzzy inference) for the AC. We demonstrate the efficiency of our AC algorithm by simulations.

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Section: Introductionmentioning

confidence: 99%

Novel admission control algorithm for GPRS/EGPRS based on fuzzy logic

Todinca

Graja

Perry

et al. 2004

Fifth IEE International Conference on 3G Mobile Communication Technologies (3G 2004) the Premier Technical Conference for 3G An

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Performance evaluation of utility‐based scheduling schemes with QoS guarantees in IEEE 802.16/WiMAX systems

Pitic

Serrelli

Redana

et al. 2009

Wireless Communications

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One of the most important benefits that WiMAX technology brings, the ability to provide differentiated quality of service (QoS) guarantees, could also prove to be the largest problem for system designers, because scheduling mechanisms able to cope with these demands have not been explicitly defined in the standard. In order to facilitate the understanding of how various scheduling schemes perform in a real system, we present here a detailed performance evaluation of some utility‐based scheduling algorithms, covering aspects like fairness and QoS provisioning. Through a series of extensive simulations, we analyse the ability of the scheduling schemes considered to strike a balance between fairness among users, or more restrictively, user QoS requirement satisfaction, and system efficiency maximization. Further, we show how several simple algorithms could be used as building blocks, constructing a powerful mechanism that allows the system designer to obtain any desired system behaviour, or even to dynamically change from one profile to another, depending on specific network‐related conditions. More specifically, by combining the benefits of proportional fair (PF) scheduling with the highly desirable system capacity maximization, and also taking into account a peak‐to‐average (PTA) channel quality metric, we are able to define a rule that outperforms traditional scheduling schemes, copes with various network conditions and provides graceful service degradation. Our results indicate that, by exploiting the intrinsic properties of orthogonal frequency division multiple access (OFDMA) as well as the mechanisms of the WiMAX system that are not regulated by the standard, one could increase the system efficiency, while fully respecting the QoS guarantees imposed. The use of algorithms that provide graceful performance degradation is highly advisable, in order to be able to employ a non‐conservative call admission control (CAC) mechanism, which further improves the overall spectral efficiency by maintaining the system close to saturation at all times. Copyright © 2009 John Wiley & Sons, Ltd.

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