Serwis Infona wykorzystuje pliki cookies (ciasteczka). Są to wartości tekstowe, zapamiętywane przez przeglądarkę na urządzeniu użytkownika. Nasz serwis ma dostęp do tych wartości oraz wykorzystuje je do zapamiętania danych dotyczących użytkownika, takich jak np. ustawienia (typu widok ekranu, wybór języka interfejsu), zapamiętanie zalogowania. Korzystanie z serwisu Infona oznacza zgodę na zapis informacji i ich wykorzystanie dla celów korzytania z serwisu. Więcej informacji można znaleźć w Polityce prywatności oraz Regulaminie serwisu. Zamknięcie tego okienka potwierdza zapoznanie się z informacją o plikach cookies, akceptację polityki prywatności i regulaminu oraz sposobu wykorzystywania plików cookies w serwisie. Możesz zmienić ustawienia obsługi cookies w swojej przeglądarce.
Handover is the process of maintaining session Quality of Service (QoS) while the customer is changing radio access network point of attachment. Handover due to mobility, while seamlessly maintaining service continuity and QoS is one of the 3GPP standard requirements. Handover with in 2G/3G cellular networks has been successfully and widely deployed. However, deployment of new radio technologies in...
Next generation mobile networks are expected to provide seamless personal mobile communication and quality of service (QoS). Fair, class based service and Lossless handoff are the key issues for providing the QoS. This paper proposes a scheduling mechanism for providing QoS in mobile networks, which exploit IP as a transport technology for transferring data between base stations of Broadband Wireless...
The success of emerging Broadband Wireless Access Systems (BWAs) depend on their ability to utilize the network resources in an efficient way. It's a complex task due to heterogeneous service nature and diverse Quality of Service (QoS) requirements of different applications that these systems support. Packet scheduling is one of the key components to provide QoS that plays a vital role in BWAs. This...
Disk I/O has been considered as serious bottleneck point in server system for a long time. In serious workload situation that we run several services in same system, we don't make sure important service has more I/O bandwidth than others and it causes performance degradation of the important service. So, they should be treated with discrimination in I/O resource management to guarantee the performance...
This paper proposes a radio resource management framework for integrated network selection mechanism control in multi- network environment as an interaction between the service providers and users in competitive manner to admit high priority users or the services that maximize their rewards. The proposed scheme comprises of three steps namely as user profile, service profile and access network selection...
Nowadays, Wireless Local Loop (WLL) systems due to its advantages in comparison with Wire Systems has become one of the first choices in technologies. In this paper a WLL network is presented. The scenarios were created in OPNET modeler as simulation tool to obtain the results. The proposal is based on the OFDM and CDMA technique. Providing QoS requirements like good throughput and minimum access...
On the basis of the architecture of IP-Based Wireless Network, a coordinated call admission control mechanism (CCAC) was presented, providing a stream for real-time applications to overcome the weakness of the transfer protocol which cannot meet the need of end-to-end eoS mechanisms because the contexts were only transferred between the previous and new access routers. We described the proposed integrated...
The femtocell networks that use Home eNodeB and existing networks as backhaul connectivity can fulfill the upcoming demand of high data rate for wireless communication system as well as can extend the coverage area. It is also of interest to minimize operational effort by introducing self-optimizing mechanisms, and the optimization of the Home eNodeB involved handover is an important goal of LTE-Advanced...
This paper presents a VoIP packet loss model applicable to wireless access transmission media and usable for determination of admissible call number threshold value. The main contribution is a more realistic approach for VoIP packet loss evaluation. The known bufferless fluid-flow method is applied but a new simple exact formula for ACT voice packets loss is developed. The suggested method is evaluated...
Optical Network has given great contribution to the growth of telecommunication technologies. In the future, high capacity, multi service support and high quality of service or experience are the needy requirements of end users for the optical network. In this article, we reviewed promising optical network architectures such as Service-Oriented-Architecture (SOA) based Optical Distribution Network...
We propose a novel architecture for distribution of IPTV services over passive optical networks (PONs) that will save > 40% bandwidth in peak hours by storing only <;; 5% of movies inside the access network.
This paper investigates Collaborative Radio Resource Management (CRRM) for femto-cell network deployments. The aim of the approach is to exploit the advantages of rapid and un-planned deployment of femto-cells, supporting more than one Radio Access Technology (RAT). The proposed approach overcomes deficiencies in existing methods that rely either on accurate determination geographic location, proximity...
In order to improve the accuracy of network access selection in heterogeneous network, this paper presents a network access selection algorithm based on the Analytic Hierarchy Process (AHP) and Gray Relation Analysis (GRA), which is an integrated approach to multiple criteria decision making, from the whole take into account the various correlative parameters, ensure the mobile users accurately choose...
The Next generation wireless network (NGWN) will be heterogeneous in nature where different radio access technologies (RATs) operate together .The mobile terminals operating in this heterogeneous environment will have different quality of service requirements to be handled by the system. The radio resource management is one of the key challenge in NGWN. Call admission control is one of the radio resource...
There are several radio access technologies providing connectivity for mobile devices. In the future, more and more mobile devices will be capable of supporting more than one access technology. For being able to use these technologies simultaneously, there is a need for multihoming capabilities. Due to the variety of access technologies and the ability to use them simultaneously, new concepts for...
Given limited network resources, applications, particularly those that support real-time services, must deliver an ambient quality-guaranteed service. Different applications are associated with different Quality of Service (QoS) concerns, as well as different QoS control parameters. This work discusses the QoS specifications of three wireless access technologies, 3G, WiMAX and WiFi, in the design...
One of the key targets for LTE/SAE is 100 Mbps peak data rate in downlink. While compared to the lined data rate, the wireless data rate is still a bottleneck. This means if there is no flow control in aGW; packets will be buffered in eNB. While the buffer in eNB is limited, packets may be dropped. To reduce the harm to the performance of the TCP based application from packet loss, flow control is...
Conversion technology between IT(Information Technology) and automotive technics creates the new industry of ITS (Intelligent Transport systems) and the new paradigm in electronics, communication and traffic fields. Specially, Vehicular communication in ITS field is one of the most important technologies necessary to connect among driver, vehicle and provider to provide quality services. Solutions...
It has been proven that the IEEE 802.16 broadband wireless access (BWA) network is the most preferable next-generation network with the well defined quality of service (QoS) framework. Due to lack of the scheduling algorithm for the guaranteed QoS in the IEEE 802.16 standard, many results for the scheduler of the IEEE 802.16 BWA network have been proposed. However, for the downlink transmission with...
In the tight-coupled next generation heterogeneous wireless networks, a user with a multi-interface terminal may have network access for different service providers using various technologies. Radio network selection (RNS) is the mechanism which decides how to select the most suitable access network (AN) based on the discovered accesses, QoS constraints, operator policies, user preferences and available...
Podaj zakres dat dla filtrowania wyświetlonych wyników. Możesz podać datę początkową, końcową lub obie daty. Daty możesz wpisać ręcznie lub wybrać za pomocą kalendarza.