Performance Analysis of VoIP in WiFi Campus Network

Samra, Aiman Ahmed Abu

doi:10.5120/ijca2017915339

Cited by 3 publications

(1 citation statement)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Several studies on evaluating the VoIP performance have been conducted in the related literature (Ahmed, 2017;Alharbi, Bahnasse, & Talea, 2017;Audah, Kamal, Abdullah, Hamzah, & Razak, 2015;Cao & Gregory, 2008;Chaudhary & Singh, 2014;Birke, Mellia, Petracca, & Rossi, 2007;Brak, Bouhorma, El Brak, & Bohdhir, 2013;Gurrapu, Mehta, & Panbude, 2016;Li, Chiang, Calderbank, & Diggavi, 2007;Meeran, Annus, & Le Moullec, 2017;Balan, Eggert, Niccolini, & Brunner, 2007;Haibeh, Hakem, & Safia, 2017;Perwej & Parwej, 2012;Tariq, Azad, Beuran, & Shinoda, 2013). Particularly, the studies in (Ahmed, 2017;Alharbi et al, 2017;Audah et al, 2015;Cao & Gregory, 2008;Chaudhary & Singh, 2014) focused on evaluating the performance of VoIP at the IP level, assessing objective parameters such as delays, jitter and packet losses, rather than evaluating the performance of VoIP at user-level which takes into account the user perception, i.e. the MOS.…”

Section: Introductionmentioning

confidence: 99%

Ns-2'de Farklı Arka Plan TCP Trafik Koşulları Altında VoIP'nin Kullanıcı Düzeyinde Performans Değerlendirmesi

Abut¹

2019

European Journal of Science and Technology

View full text Add to dashboard Cite

Voice over IP (VoIP) is gaining more and more importance and displaces the traditional telephony. For example, more than 300 million monthly active users worldwide use the popular VoIP application "Skype". However, a big problem in the VoIP environment is the voice quality. The purpose of this study is to investigate the effects of background TCP traffic on perceived voice quality of a VoIP conversation at the user-level using the G.711 codec. Two different playout buffering policies including static buffering and optimal buffering have been applied by the VoIP server. For comparison purposes, the same experiments have also been repeated when no playout buffering policy has been used by the VoIP server. A three-hop network topology consisting of a source, a transit, and a destination subnetwork was simulated whereas the end-to-end capacity of the entire network was limited by a 1.5 Mbps Asymmetric Digital Subscriber Line (ADSL) link. Multiple simultaneous TCP connections with different segment sizes were established to simulate the various conditions of background traffic. By using the ns2voip framework, an enhancement to the popular Network Simulator 2 (ns-2), extensive simulation experiments for analyzing the VoIP user-level performance have been carried out and the voice quality has been evaluated by calculating the Mean Opinion Score (MOS). The results show that the voice quality is strongly negatively affected by background TCP traffic, even in the presence of a single TCP flow with 1500 Byte segments. Also, the size of background TCP segments significantly influences the achievable MOSs of VoIP conversations. However, it has also been observed that aggregating multiple speech frames into a single IP packet can increase the MOS. Particularly, depending on the number and segment size of background TCP flows, aggregation of the optimal number of speech frames into the same IP packet improves the MOSs up to 14.61% over a 1.5 Mbps ADSL link.

show abstract

Section: Introductionmentioning

confidence: 99%

Ns-2'de Farklı Arka Plan TCP Trafik Koşulları Altında VoIP'nin Kullanıcı Düzeyinde Performans Değerlendirmesi

Abut¹

2019

European Journal of Science and Technology

View full text Add to dashboard Cite

show abstract

A double-layer isolation mechanism for malicious nodes in wireless sensor networks

2021

View full text Add to dashboard Cite

Topology-Based Routing Protocols and Mobility Models for Flying Ad Hoc Networks: A Contemporary Review and Future Research Directions

Wheeb

Nordin

Abu-Samah

et al. 2021

Drones

View full text Add to dashboard Cite

Telecommunications among unmanned aerial vehicles (UAVs) have emerged recently due to rapid improvements in wireless technology, low-cost equipment, advancement in networking communication techniques, and demand from various industries that seek to leverage aerial data to improve their business and operations. As such, UAVs have started to become extremely prevalent for a variety of civilian, commercial, and military uses over the past few years. UAVs form a flying ad hoc network (FANET) as they communicate and collaborate wirelessly. FANETs may be utilized to quickly complete complex operations. FANETs are frequently deployed in three dimensions, with a mobility model determined by the work they are to do, and hence differ between vehicular ad hoc networks (VANETs) and mobile ad hoc networks (MANETs) in terms of features and attributes. Furthermore, different flight constraints and the high dynamic topology of FANETs make the design of routing protocols difficult. This paper presents a comprehensive review covering the UAV network, the several communication links, the routing protocols, the mobility models, the important research issues, and simulation software dedicated to FANETs. A topology-based routing protocol specialized to FANETs is discussed in-depth, with detailed categorization, descriptions, and qualitatively compared analyses. In addition, the paper demonstrates open research topics and future challenge issues that need to be resolved by the researchers, before UAVs communications are expected to become a reality and practical in the industry.

show abstract

Performance Analysis of VoIP in WiFi Campus Network

Cited by 3 publications

References 7 publications

Ns-2'de Farklı Arka Plan TCP Trafik Koşulları Altında VoIP'nin Kullanıcı Düzeyinde Performans Değerlendirmesi

Ns-2'de Farklı Arka Plan TCP Trafik Koşulları Altında VoIP'nin Kullanıcı Düzeyinde Performans Değerlendirmesi

A double-layer isolation mechanism for malicious nodes in wireless sensor networks

Topology-Based Routing Protocols and Mobility Models for Flying Ad Hoc Networks: A Contemporary Review and Future Research Directions

Contact Info

Product

Resources

About