Performance of voice over IP (VoIP) over a wireless LAN (WLAN) for different audio/voice codecs
Capacity and Quality of Service (QoS) are two of the most important issues that need to be resolved before the commercial deployment of VoIP over wireless LAN (WLAN). The capacity is highly dependent on the chosen speech codec. Thus, several codecs are studied (namely, G.711 and G.723.1 and G.729) t...
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| Format: | Article |
| Language: | English English |
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Penerbit UTM Press
2007
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| Online Access: | http://eprints.utm.my/5721/ http://eprints.utm.my/5721/1/AliasMohd2007_PerformanceOfVoiceOverIP.pdf http://eprints.utm.my/5721/2/jurnalteknologi/article/view/266 |
| _version_ | 1848891108797448192 |
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| author | Mohd., Alias Ong, Lee Loon |
| author_facet | Mohd., Alias Ong, Lee Loon |
| author_sort | Mohd., Alias |
| building | UTeM Institutional Repository |
| collection | Online Access |
| description | Capacity and Quality of Service (QoS) are two of the most important issues that need to be resolved before the commercial deployment of VoIP over wireless LAN (WLAN). The capacity is highly dependent on the chosen speech codec. Thus, several codecs are studied (namely, G.711 and G.723.1 and G.729) to determine their effects on the available capacity supported. On top of that, factors affecting QoS such as packet loss, jitter, throughput, and delay for various capacity networks are studied in this paper. This was done by simulating VoIP traffics over the WLAN using Network Simulator 2 (ns2) and predicting voice quality based on E-model. The simulation measurements were verified by the theoretical analysis. In conclusion, G.711 codec allows up to 5 simultaneous VoIP nodes, G.723.1 codec allows up to 15 nodes and G.729 codec allows up to 5 nodes for a voice quality greater than R=70 and distance 10 meter from VoIP nodes to access point (AP) |
| first_indexed | 2025-11-15T20:52:44Z |
| format | Article |
| id | utm-5721 |
| institution | Universiti Teknologi Malaysia |
| institution_category | Local University |
| language | English English |
| last_indexed | 2025-11-15T20:52:44Z |
| publishDate | 2007 |
| publisher | Penerbit UTM Press |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | utm-57212017-11-01T04:17:25Z http://eprints.utm.my/5721/ Performance of voice over IP (VoIP) over a wireless LAN (WLAN) for different audio/voice codecs Mohd., Alias Ong, Lee Loon QA75 Electronic computers. Computer science Capacity and Quality of Service (QoS) are two of the most important issues that need to be resolved before the commercial deployment of VoIP over wireless LAN (WLAN). The capacity is highly dependent on the chosen speech codec. Thus, several codecs are studied (namely, G.711 and G.723.1 and G.729) to determine their effects on the available capacity supported. On top of that, factors affecting QoS such as packet loss, jitter, throughput, and delay for various capacity networks are studied in this paper. This was done by simulating VoIP traffics over the WLAN using Network Simulator 2 (ns2) and predicting voice quality based on E-model. The simulation measurements were verified by the theoretical analysis. In conclusion, G.711 codec allows up to 5 simultaneous VoIP nodes, G.723.1 codec allows up to 15 nodes and G.729 codec allows up to 5 nodes for a voice quality greater than R=70 and distance 10 meter from VoIP nodes to access point (AP) Penerbit UTM Press 2007-12 Article PeerReviewed application/pdf en http://eprints.utm.my/5721/1/AliasMohd2007_PerformanceOfVoiceOverIP.pdf text/html en http://eprints.utm.my/5721/2/jurnalteknologi/article/view/266 Mohd., Alias and Ong, Lee Loon (2007) Performance of voice over IP (VoIP) over a wireless LAN (WLAN) for different audio/voice codecs. Jurnal Teknologi, 47 (D). pp. 39-60. ISSN 0127-9696 DOI:10.11113/jt.v47.266 |
| spellingShingle | QA75 Electronic computers. Computer science Mohd., Alias Ong, Lee Loon Performance of voice over IP (VoIP) over a wireless LAN (WLAN) for different audio/voice codecs |
| title | Performance of voice over IP (VoIP) over a wireless LAN (WLAN) for different audio/voice codecs |
| title_full | Performance of voice over IP (VoIP) over a wireless LAN (WLAN) for different audio/voice codecs |
| title_fullStr | Performance of voice over IP (VoIP) over a wireless LAN (WLAN) for different audio/voice codecs |
| title_full_unstemmed | Performance of voice over IP (VoIP) over a wireless LAN (WLAN) for different audio/voice codecs |
| title_short | Performance of voice over IP (VoIP) over a wireless LAN (WLAN) for different audio/voice codecs |
| title_sort | performance of voice over ip (voip) over a wireless lan (wlan) for different audio/voice codecs |
| topic | QA75 Electronic computers. Computer science |
| url | http://eprints.utm.my/5721/ http://eprints.utm.my/5721/ http://eprints.utm.my/5721/1/AliasMohd2007_PerformanceOfVoiceOverIP.pdf http://eprints.utm.my/5721/2/jurnalteknologi/article/view/266 |