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Qualitative online billing system performance is essential for cost-effective service providers. This paper presents the method of technical resources' distribution of the billing server based on the resource requirements of different types of service that takes into account the daily load statistics of different types of services and increases the revenue by providing an individual approach to services...
The IP Multimedia Subsystem (IMS) seems to be the technology that will prevail in Next Generation Networks (NGN s), since the interworking environment and the service flexibility that this technology offers to the currently deployed wireless broadband technologies makes it appealing to users, service developers and network operators. In this paper a heterogeneous network model based on the IMS that...
Today's heterogeneous networks are still in growing progress with the current introduction of Long Term Evolution. Despite the given infrastructure, hardly any service provider offers seamless voice call services due to the high integration cost. For addressing this issue, we introduce a feasible Virtual Room based Vertical Handoff (VOOH) cloud solution that only applies latest existing wireless access...
The full coverage of continuous voice cloud services is still an open issue in an overlapping network, particularly with regard to heterogeneously public communication network infrastructures. However, hardly anyone of today's service providers offers seamless voice call continuity across these networks due to the high technical integration effort and economic cost. Given this backdrop, we present...
In the future, the technology of femtocell application („home base stations“) will most likely enable reduction of costs for telecommunications provider. This paper presents the installation and use of femtocells, as well as the problems one may encounter during this process. The possibilities of implementation of new equipment to existing mobile networks are also discussed.
The problem of providing an efficient and low-cost video streaming service over wireless access networks is considered in this work. The usage of multicast content delivery combined with popularity-based video caching, enables to provide video-on-demand services over wireless networks. In order to tackle the "last mile" bottleneck for video delivery to the home, we propose a content-aware...
The convergence of third generation (3G) wide area wireless network and wireless local area network (WLAN) offers characteristics that complement each other perfectly. To provide secure 3G-WLAN convergence, extensible authentication protocol-authentication and key agreement (EAP-AKA) protocol, that has got many risk, is used. This paper elaborate risks in using EAP-AKA for 3G-WLAN convergence, proposes...
In order to evaluate performance of mobile networks, it is necessary to consider the occurrence of random failures causing performance degradation and the consequent repair actions. This approach is especially suitable for next generation networks based on the Third Generation Partnership Project (3GPP) IP Multimedia Subsystem (IMS), as a consequence of the very high Quality of Service levels required...
Consumption of multimedia content via the Internet by home users is on the rise. In addition to the delivery via traditional media like TV, many live events are streamed via the Internet. The increased availability of smart-phones, netbooks and high wireless access bandwidth encourages users to consume content on-the-go via mobile technologies. This work identifies requirements necessary to perform...
The satisfaction of end-users is important when evaluating services and products. Visualizing the network behavior in mobile streaming as well as modeling the correlation between Quality of Service (QoS) and Quality of Experience (QoE) is expected to improve user satisfaction of services on the Internet. Given that network and human factors are the elements that affect the final output of the measurements,...
The IP Multimedia System (IMS) is a promising solution for converging new technologies with existing networks. The interworking environment and service flexibility that IMS offers to the currently deployed wireless broadband technologies, makes it appealing to users, service developers and network operators. In our previous work a heterogeneous network model based on IMS that integrates the Worldwide...
Rapid development has equipped mobile devices with heterogeneous wireless access capabilities. A lot of work has been done on WLAN-3G integration to support seamless connectivity and global roaming. Most recent research trends focus on interwork gateway or intersystem roaming framework. In this paper, we introduce an application framework providing seamless connectivity for mobile devices across heterogeneous...
In this paper, we propose seamless handover scheme between heterogeneous networks by using a method which determines best target access network which can support required QoS in case of insufficient resource status of specific access network.
The IP Multimedia Subsystem (IMS) defined by the 3rd Generation Partnership Project (3GPP) and 3GPP2 provides a platform for the provision of multimedia services with quality of service (QoS). In addition, this service architecture allows third-party vendors to create advanced multimedia and multisession services across wireless and wireline network access. The Session Initiation Protocol (SIP) supports...
This paper provides a technological overview of the system architecture evolution (SAE) of LTE networks. The target of this overview is to provide a basic knowledge on 4G cellular network structure, entities responsibilities and protocol-stack. The overview is mainly based on the relevant 3GPP standards and on Chapter 3 of the book "LTE for UMTS: OFDMA and SC-FDMA based radio access" edited...
A technical prerequisite for a converged network is a common service delivery platform that is independent from the access networks below. The 3GPP SIP-based IP multimedia subsystem (IMS) is defined for this purpose. By specification, IMS is the first implementation towards reaching converged communications which allows users to communicate with video, audio and multimedia content, via any fixed,...
Billing, charging and accounting are the most critical operational support activities for any telecommunications network operator. Through these activities operators recover costs for service provision, and make business profits. IMS charging is required at the services level as well as the transport level. In networks with QoS guarantees, it is necessary for user preferences of service quality levels...
Telecommunication networks are evolving towards unified next generation networks (NGN). Policy control is included in different subsystems of NGN to provide customized control of service delivery depending on different factors. Many management challenges rise considering the intrinsic heterogeneity of the different sub-domains where policy control is to be applied. Each of the current proposed policy...
In future wireless networks, the users will have the capability to access to multiple networks via multi-mode terminal. There is a need to have mechanism in place to decide which radio access network is the most suitable for the user and for the services that the user requires. To address these issues, we propose an access system(AS) selection algorithm, based on a combination of multi-attribute utility...
Heterogeneous convergence networks will integrate multiple access technologies to provide seamless mobility for users with high-speed connectivity. This will give rise to a heterogeneous networks environment that can provide open standard interfaces regardless of the diversity of heterogeneous networks, where handoff mechanism is used to keep the services continued. In this paper, a heterogeneous...
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