A study of VOIP codecs performance over IEEE 802.11n

Voice over Internet Protocol (VoIP) is actually a link between the nodes which communicate with each other through VoIP link. VoIP faces many threats and attacks. Among those attack is Eavesdropping attack. Voice packets suffer due to Eavesdropping attack because of noise and interference of the channel. Hence the receiver cannot receive all the packets at the same duration of time. Jitter buffer is an important device which can be used to eliminate noise and interference of the channel. In this paper, we have studied about VoIP codecs performance over IEEE 802.11n. Voice quality can be improved simply by increasing the average MOS and reducing the delay factor. There are different VoIP codecs such as G.711, G.729, G.726ar24 and G.726ar32. Out of all these codecs, G.711 has shown good results since the call quality for G.711 is excellent.