IMS charging can be performed at various planes of the IMS architecture. Different charging schemes may be utilized. The optimal charging scheme would be service dependent, but may also be influenced by user expectations. The 3GPP has standardized charging mechanisms, protocols and interfaces for IMS charging control; online and offline charging have been standardized. However, the design and d...

In a Universal Mobile Telecommunications System (UMTS), a user equipment (UE) can access IP multimedia services through IP Multimedia Subsystems (IMS). In addition to passing IMS authentication, called IMS AKA, this UE also needs to pass General Packet Radio Service (GPRS) authentication, called 3GPP AKA, since the data of the IMS service is transmitted through a GPRS network. Many steps in the...

In the past few years, Integrated Modular Systems (IMS) have been increasingly seen as a way of reducing the cost associated with computing in high-integrity control applications. An IMS is a network of computational nodes, sensors (with redundancy) and actuators. This type of system uses specific software architectures and configuration processes to allow the deployment of the control applicat...

The IP Multimedia Subsystem (IMS) is becoming the de facto overlay network for enabling the delivery of multimedia services in converged networks. Because it is envisioned that the IMS will experience a considerable growth in the years to come, it is important to verify that the involved resources conforming an IMS deployment deliver the desired performance when the system is operating under st...

The aim of this paper is to describe the process of the design and implementation of IP Multimedia Subsystem (IMS) in one Telecom Operator in Bosnia and Herzegovina. IMS gives Telecom Operators the opportunity to do the convergence of fixed and mobile communication networks into one single network. In this work, the design and implementation of IMS system has been done by using ITIL V3 recommen...

In this paper we share our experiences on establishing, running, and extending a Next Generation Network (NGN) and IP Multimedia Subsystem (IMS) testbed. The testbed has been designed based on the layered architecture of NGNs and aims at satisfying Information and Communication Technology (ICT) industry requirements for open and flexible testing infrastructures. In the center of this telecommun...

Abstract Gas chromatography-ion mobility spectrometry (GC-IMS) is an emerging analytical technique that has the advantages of fast response, high sensitivity, simple operation, and low cost. The combination speed resolution GC with sensitivity IMS makes GC-IMS play important role in detection food volatile substances. This paper focuses on basic principles future development trend, comparative ...

Background: Analysis of exhaled breath, especially of volatile organic compounds (VOCs), is of increasing interest in the diagnosis of lung cancer. Compared to other methods of breath analysis, ion mobility spectrometry (IMS) offers a ten-fold higher detection rate of VOCs. By coupling the ion mobility spectrometer with a multi-capillary column as a pre-separation unit, IMS offers the advantage...

The IP Multimedia Subsystem (IMS) was developed by a common initiative of the standardization bodies 3GPP and ETSI TISPAN with the aim to provide a platform for fixed and mobile network operators that supports future communication services. In this article we give an overview about the implications that security threats already known from the Internet have on IMS. We analyze the security requir...