Abstract
Voice over IP (VoIP) technology is suffering from squandering the network bandwidth because of the very high packet header overhead. Packet multiplexing methods are used to reduce packet header overhead. In this paper, a new packet multiplexing method, called Voice Frame Pruning and Multiplexing (PM-VFrm), is proposed to improve VoIP bandwidth utilisation. The PM-VFrm achieves this in two aspects. First, multiplexing several packets that share the same route in one header. Unlike the current methods, the PM-VFrm will not add any additional header to the VoIP packets, because it reemploys some of the fields in the RTP header. Second, reducing the VoIP packets' payload size by pruning the voice frame based on a specific algorithm. Again, none of the current methods has proposed pruning the voice frame. The PM-VFrm method outperforms comparable methods. The saved bandwidth has exceeded 55% compared with the traditional method (without multiplexing).
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