Performances analysis of VoIP over 802.11b and 802.11e using different CODECs

Marzuki, Ade Syaheda Wani; Chai, Yu Ka; Zen, Huzhairi; Wee, Lee Liang; Lias, Kasumawati; Mat, Dayang Azra Awang

doi:10.1109/iscit.2010.5664844

Cited by 8 publications

(5 citation statements)

References 1 publication

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“…In the last few years, much has been done to deal with issues relating to performance or dependability of real time applications, such as VoIP services [14,15,16,17,18,19,20,21,22]. Initially, Reference [14] provides an insight into the impact of TCP segmentation in VoIP monitoring and the solution that has been applied to face it.…”

Section: Related Workmentioning

confidence: 99%

“…In turn, the work presented in [15] In [16], a systematic approach for quantifying the reliability of enterprise VoIP networks is presented. It identifies two key challenges for designing enterprise VoIP service infrastructure: i) there are no universally accepted objectives or standards for the reliability of the enterprise VoIP services; ii) there is no well known common set of reliability metrics to be used in enterprise VoIP service planning.…”

Section: Related Workmentioning

confidence: 99%

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Performability Evaluation of Voice Services in Converged Networks

Guimarães

Rodrigues

Nogueira

2020

RITA

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In the last years, the transmission of voice services in converged networks has experienced a huge growth. However, there are still some questions considering the ability of these networks to deliver voice services with acceptable quality. In this paper, we applied analytical modeling and simulation to analyze the quality of voice services using a new index, called MOS a , which considers jointly the MOS index and the availability of the subjacent infrastructure. We consider the influence of different CODECs (G.711 and G.729), queuing policies (Priority Queuing and Custom Queuing), and the warm standby redundancy mechanism. Our goal is to analyze the quality of these services by taking into account overloading conditions in different architectures/scenarios. These scenarios were constructed using the modeling mechanisms Reliability Block Diagram and Stochastic Petri Nets in addition to a discrete event simulator. Experimental results indicate that the G.711 CODEC has a higher sensitivity both in terms of data traffic volume and allocated network resources in relation to the G.729 CODEC.

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Section: Related Workmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

Performability Evaluation of Voice Services in Converged Networks

Guimarães

Rodrigues

Nogueira

2020

RITA

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“…It is recommended that the jitter in the VoIP network should be not more than 30 ms [8], however, jitter problem could be cleared or decreased by using jitter buffers. In general, it should be about two times the size of the variance of the travel time [9].…”

Section: Network Parameters: Packet Loss Jitter and Delaymentioning

confidence: 99%

A study of G.711 and ILBC over WLAN 802.11n with EDCA

Chanthong

Wuttidittachotti

Daengsi³

2015

2015 International Conference on Information Networking (ICOIN)

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Nowadays, wireless network technology becomes one of the most popular technologies, especially IEEE 802.11n. However, there are many conditions that cause performance to decrease. This study has been conducted to analyze the IEEE 802.11n standard while using Voice over IP (VoIP) in the Enhanced distributed channel access (EDCA) mode which is supported in IEEE 802.11e. The study was conducted in 2 states of traffic conditions, which are free-traffic and congested traffic, and to study the effects and differences. From this study, it has been found that EDCA mode can help to achieve small performance gain for VoIP but with limitation to deal with very high traffic.

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“…We observe the parameters of interest at various layers. Other studies such as [7], [8] and [9] were conducted to improve the capacity of VoIP in WLAN. These compare the performance of VoIP codecs in EDCA but do not include multi-rate and jitter analysis.…”

Section: B Simulation Modelmentioning

confidence: 99%

Performance analysis of VoIP codecs over multi-rate EDCA

Khan

Smith

Hussein

et al. 2012

2012 IEEE Consumer Communications and Networking Conference (CCNC)

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Enhanced Distributed Channel Access (EDCA) is a mandatory part of the IEEE 802.11e standard which provides Medium Access Control (MAC) layer solution for Quality of Service (QoS) provisioning in Wireless Local Area Networks (WLANs). It is a contention based protocol which prioritizes channel access to QoS traffic using four Access Categories (ACs). In this paper, we introduce the performance evaluation of high priority Voice over Internet Protocol (VoIP) traffic over EDCA in multi-rate WLAN. In a multi-rate environment, the channel physical transmission rate is changed by the Access Point (AP) as the stations move towards or away from the AP. The AP performs rate adaptation on each frame according to the channel condition or signal quality that the frame is likely to experience when stations are considered mobile. We implement EDCA at the MAC layer over the physical layer of IEEE 802.11b radios using the network modeling and simulation tool QualNet. We simulate multiple VoIP nodes in a single QoS-enabled Basic Service Set (QBSS) with one QoS-enabled AP (QAP). The performance of each VoIP node is evaluated with three VoIP codecs. We first use codecs without jitter buffer and evaluate jitter with other performance parameters. The simulations are repeated for different codecs with jitter buffer. The effect of jitter buffer on Jitter, Delay and Mean Opinion Score (MOS) for each VoIP node is compared with other codecs in stationary and mobile environments. Simulation results show the effectiveness of using jitter buffer and its limitations in a multi-rate environment.

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Performances analysis of VoIP over 802.11b and 802.11e using different CODECs

Cited by 8 publications

References 1 publication

Performability Evaluation of Voice Services in Converged Networks

Performability Evaluation of Voice Services in Converged Networks

A study of G.711 and ILBC over WLAN 802.11n with EDCA

Performance analysis of VoIP codecs over multi-rate EDCA

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