Abstract Internet of Things (IoT) and cyber‐physical systems demand proper real‐time data
processing and analysis to fulfill the essential characteristics of seamless computing …

Natural movement and locomotion in Virtual Environments (VE) is constrained by the user's
immediate physical space. To overcome this obstacle, researchers have established the use …

IP Multimedia Subsystem (IMS) is a new next generation networking architecture that will
provide better quality of service, charging infrastructure and security. The basic idea behind …

The 3GPP IMS is a next generation network architecture aimed at bringing the features and
rich services of the Internet to the telephony world. Traditionally telephony products are …

Legacy networks, both fixed and mobile, which were originally designed for voice
communications, are progressively migrating to new infrastructures that promise to …

The accurateness of round-trip-and one way delay measurements for 2G and 3G networks
rely to a much larger extent on employing a sound methodological framework than this is the …

Re-architecting mobile network functions and central office is one of the hottest topics of
software defined networking (SDN) and network function virtualization (NFV). It is known as …

IP multimedia subsystem (IMS) and IMS-based services are increasingly providing
interoperable session control and mobility for next-generation all-IP networks. However …

Push-to-Talk (PTT) is a one-way voice group communication. It is very simple and easy to
operate the PTT conversation. A talker presses the “talk” button of a PTT session to speak …

In this paper, we present the creation and characterization of an open source Internet
Protocol Multimedia Subsystem (IMS) test bed. We built this test bed with the intention and …