With the approaching 3G wireless standard, the development of an efficient technique for transporting a mix of voice and data over limited bandwidth links is crucial. State of the art GSM systems use the connection oriented ATM protocol, while data networking is based on the best-effort IP protocol. ATM protocols have been developed for efficient universal networking with mixed voice and data t...

Voice over IP (VoIP) applications such as Skype, Google Talk, and FaceTime are promising technologies for providing low cost voice calls to customers over the existing data networks. Wireless networks such as Wi-Fi and WiMAX focus on delivering Quality of Service (QoS) for VoIP applications. However, there are numerous aspects that affect quality of voice connections over wireless networks. In ...

Communication services such as, Voice over IP (VoIP), over the Internet have gained much attention in recent years, as next generation Internet applications are requiring the integration of voice and data in the single IP infrastructure. In this paper, we propose a Peer-to-Peer (P2P)/ Grid-based architecture to efficiently provide VoIP services in large scale IP networks. Particularly, our tech...

RTP/RTCP protocol suite provides the means for sending packetized voice by introducing time stamps and sequence numbers in packet headers. Playout buffering is needed to re-synchronize the received voice stream. In this paper, a new adaptive playout delay adjustment algorithm is introduced. A major problem, especially on low-bandwidth links, with Voice over IP (VoIP) packets is that they includ...

As voice services impose stringent quality of service (QoS) guarantees to perform well over IP networks, large network resources should be allocated to their traffic class. It gets unaffordable when hard guarantees are required as in deterministic-based mechanisms such as the guaranteed services model of the integrated services (IntServ) architecture. However, the amount of network resources co...

The work presented in this report was performed within the IMMSAT project, a project carried out during Q2-Q4 2000 by Norsk Regnesentral [21] and Nera SatCom AS [23]. IMMSAT comprised both a theoretical and an empirical study of technical aspects concerning “Internet Protocol based MultiMedia Services over a Satellite Network”. Specifically, the project focussed upon technical aspects involved ...

Quality of Service in Enterprise VoIP Voice-Over-IP (VoIP) allows the convergence of voice and data traffic on the enterprise packet-based data network. Migration to VoIP telephony is accelerating: organizations upgrading or changing facilities are examining VoIP-based solutions. For those implementing VoIP, success depends on guaranteeing that “Quality of Service” (QoS) is equivalent to that p...