Figure 2 - uploaded by Salman Baset
Content may be subject to copyright.
P2P VoIP architecture.
Source publication
Context in source publication
Context 1
... managed-servers provide functionality for authentication, contact list and voicemail storage, and calling PSTN and mobile phones. Figure 2 shows an il- lustration of a p2p VoIP system. Table 1 compares the distributed and centralized features of the T-ITSP, enterprise VoIP systems, Google Talk, and Skype. ...
Similar publications
Citations
... VoIP is a communication system technology that enables multimedia communication via the IP [1]. VoIP comes in a wide variety of flavors such as desktop-based applications (e.g., Skype and Google Hangouts), systems replacing the Public Switched Telephony Network (PSTN) as a primary line voice service (e.g., Vonage), and, more recently, VoIP over smart or mobile phones (e.g., Viber, WhatsApp, and Line) [2]. ...
... This figure doubled by 2011. However, VoIP call prices are falling [2], [15]. Therefore, VoIP providers need to consider reducing the power consumption of their network through the virtualization of their functions. ...
The rapid growth of communications and multimedia network services such as Voice over Internet Protocol (VoIP) have caused these networks to face a crisis in resources from two perspectives: 1. Lack of resources and, as a result, overload; 2. Redundancy of resources and, as a result, energy loss. Cloud computing allows the scale of resources to be reduced or increased on demand. Many of the gains obtained from the cloud computing come from resource sharing and virtualization technology. On the other hand, the emerging concept of Software-Defined Networking (SDN) can provide a global view of the entire network for integrated resource management. Network Function Virtualization (NFV) can also be used to virtually implement a variety of network devices and functions. In this paper, we present an energy-efficient framework called GreenVoIP to manage the resources of virtualized cloud VoIP centers. By managing the number of VoIP servers and network equipment, such as switches, this framework not only prevents overload but also supports green computing by saving energy. Finally, GreenVoIP is implemented and evaluated on real platforms, including Floodlight, Open vSwitch, and Kamailio. The results suggest that the proposed framework can minimize the number of active devices, prevent overloading, and provide service quality requirements.
... Studies have shown a swift increase of the number of VoIP users over the past few years [3,4]. With this constant growth of VoIP users and power consumption being a critical issue, the question would be, how much energy efficient are these VoIP systems as they require continuous consumption of energy [5]. ...
The importance of deploying energy efficient networks has vastly increased due to the rapidly growing nature of power consumption of ICT industry. This requires redesign of networks or modification to existing networks that could prove to be energy efficient. In this paper, two telephone networks namely traditional Public-Switched Telephone Network (PSTN) and Voice over Internet Protocol (VoIP), are extensively examined in terms of energy consumption by means of measurements on our University Campus systems, modeling and actual experiments. Results show that the VoIP system is more energy hungry with respect to traditional PSTN. We then devise possible solutions which are more efficient in terms of energy than current technology.
