Improving VoIP Traffic Performance in WiMAX Networks

Adhicandra, Iwan

doi:10.1109/internet.2010.49

Cited by 13 publications

(13 citation statements)

References 4 publications

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“…In our paper, as in some relevant literature in the field , the focus is on considering impairments associated to loss and delay; for the other impairments, we have set the default values as suggested by the ITU‐T Recommendation G.107 . Accordingly, a simplified way of estimating the R factor is as follows:

R = 94.2 - I_{d} - I_{e - eff}

where I d is a function of the one‐way delay d (in milliseconds):

I_{d} = \{\begin{array}{l} 0.024 \cdot d & 177.3 > d \\ 0.024 \cdot d + 0.11 \cdot (d - 177.3) & d \geq 177.3 \end{array}

and I e − e f f , in case of the G.711 codec with random loss of packets, is as follows:

I_{e - eff} = 30 \cdot \ln (1 + 15 e)

where e identifies the packet loss .…”

Section: Proposed Solutionmentioning

confidence: 99%

“…In our paper, as in some relevant literature in the field [32][33][34][35][36][37][38], the focus is on considering impairments associated to loss and delay; for the other impairments, we have set the default values as suggested by the ITU-T Recommendation G.107 [31]. Accordingly, a simplified way of estimating the R factor is as follows:…”

Section: Mean Opinion Scorementioning

confidence: 99%

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VoIP traffic in wireless mesh networks: a MOS‐based routing scheme

Serrano

Campobello

Leonardi³

et al. 2015

Wireless Communications

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Support of Voice over Internet Protocol (VoIP) services in wireless mesh networks requires implementation of efficient policies to support low-delay data delivery. Multipath routing is typically supported in wireless mesh networks at the network level to provide high fault tolerance and load balancing because links in the proximity of the wireless mesh gateways can be very stressed and overloaded, thus causing scarce performance. As a consequence of using multipath solutions, lower delay and higher throughput can be supported also when a given path is broken because of mobility or bad channel conditions, and alternative routes are available. This can be a relevant improvement especially when assuming that real-time traffic, such as VoIP, travels into the network. In this paper, we address the problem of Quality of Service (QoS) support in wireless mesh networks and propose a multipath routing strategy that exploits the Mean Opinion Score (MOS) metric to select the most suitable paths for supporting VoIP applications and performing adaptive load balancing among the available paths to equalize network traffic. Performance results assess the effectiveness of the proposed approach when compared with other existing methodologies.

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R = 94.2 - I_{d} - I_{e - eff}

where I d is a function of the one‐way delay d (in milliseconds):

I_{d} = \{\begin{array}{l} 0.024 \cdot d & 177.3 > d \\ 0.024 \cdot d + 0.11 \cdot (d - 177.3) & d \geq 177.3 \end{array}

and I e − e f f , in case of the G.711 codec with random loss of packets, is as follows:

I_{e - eff} = 30 \cdot \ln (1 + 15 e)

where e identifies the packet loss .…”

Section: Proposed Solutionmentioning

confidence: 99%

Section: Mean Opinion Scorementioning

confidence: 99%

VoIP traffic in wireless mesh networks: a MOS‐based routing scheme

Serrano

Campobello

Leonardi³

et al. 2015

Wireless Communications

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show abstract

“…In this study, the authors mainly concentrated on the call quality measurement using the R-factor instead of the MOS. As I. Adhicandra stated in [7], with the use of ertPS instead of the UGS scheduling class, the BE performance can be increased because ertPS use a silence suppression mechanism. In this paper, the authors only consider the data over BE and also do not provide detail about the voice codec.…”

Section: Related Workmentioning

confidence: 99%

Performance Analysis of VoIP Codecs over BE WiMAX Network

Tariq¹,

Azad²,

Beuran³

et al. 2013

IJCEE

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Abstract-IEEE802.16 technology due to its outstanding larger coverage area, high data rates, inexpensive equipments, ease of deployment and guaranteed QoS make it a suitable candidate for future broadband wireless access networks. The Mobile WiMAX has been designed to provide Broadband Internet service to mobile users. The VoIP is flexible and provides low cost telephony to customers over the existing IP infrastructure. However, there are still many challenges that need to be addressed to provide a steady and good quality voice connection over the best-effort Internet. In this paper we evaluate the performance of different VoIP codecs over the best effort WiMAX network. The network performance metrics such as jitter, one way delay, and packet loss and user perception metric that is Mean Opinion Score have been used to evaluate the performance of VoIP codecs. The simulation is performed in QualNet simulator with varying values of Packet size, number of calls and jitter buffer sizes. Our results indicate that varying the jitter buffer size and packetization time affects the quality of voice over the best effort network.

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“…In 2010 QoS deployment over a cellular WiMAX network [4] was examined. The author has compared the performance obtained using two different QoS configurations differing from the delivery service class used to transport VoIP traffic, i.e.…”

Section: Related Workmentioning

confidence: 99%

Comparative Analysis of Quality of Service for Various Service Classes in WiMAX Network using NS-3

Sharma¹,

Chawla²

2014

IJCATR

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Abstract:Broadband access is an important requirement to satisfy user demands and support a new set of real time services and applications. WiMAX, as a Broadband Wireless Access solution for Wireless Metropolitan Area Networks, covering large distances with high throughput and is a promising technology for Next Generation Networks. Nevertheless, for the successful deployment of WiMAX based solutions, Quality of Service (QoS) is a mandatory feature that must be supported. Quality of Service (QoS) is an important consideration for supporting variety of applications that utilize the network resources. These applications include voice over IP, multimedia services, like, video streaming, video conferencing etc. In this paper the performances of the MPEG-4 High quality video traffic over a WiMAX network using various service classes has been investigated. To analyze the QoS parameters, the WiMAX module developed based on popular network simulator NS-3 is used. Various parameters that determine QoS of real life usage scenarios and traffic flows of applications is analyzed. The objective is to compare different types of service classes with respect to the QoS parameters, such as, throughput, packet loss, average delay and average jitter.

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Improving VoIP Traffic Performance in WiMAX Networks

Cited by 13 publications

References 4 publications

VoIP traffic in wireless mesh networks: a MOS‐based routing scheme

VoIP traffic in wireless mesh networks: a MOS‐based routing scheme

Performance Analysis of VoIP Codecs over BE WiMAX Network

Comparative Analysis of Quality of Service for Various Service Classes in WiMAX Network using NS-3

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