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Cloud computing offers utility oriented services to users. It also reduces the maintenance cost of the infrastructure as well as initial investment cost for users or startup companies. Due to the effectiveness of these services, many companies or institutes are trying to adopt this technology for offloading scientific or industrial applications. Virtualization in cloud computing is used to build virtual...
Femtocells applied in many existing systems, such as HSPA, 3GPP LTE, WiMAX, and etc, which cover a short range and offer an economically viable way to improve cellular system capacity, have caught world-wide researching interest nowadays. The primary purpose of femtocell solutions has been to improve indoor coverage in current cellular systems. Here, users that are moved to femtocells experience increased...
Recently, message brokering services that are based on publish and subscribe paradigm are widely adopted in many areas such as remote facilities monitoring. Typically, they support a large scale distributed network of exchanging messages between services and clients. In this paper, we introduce a cloud-based message brokering service which allows better scalability and dynamic load balancing between...
In this paper, we propose a load balancing scheme for heterogeneous multiple AS (Application Server) system in IMS (IP Multimedia Subsystem) network. In IMS network, S-CSCF (Serving Call Session Control Function) utilizes iFC(initial Filter Criterion) downloaded by HSS(Home Subscriber Server) and generates service trigger through the SIP message. To perform load balancing among multiple AS with different...
Coupled Multi-Physics simulations, such as hybrid CFD-MD simulations, represent an increasingly important class of scientific applications. Often the physical problems of interest demand the use of high-end computers, such as TeraGrid resources, which are often accessible only via batch-queues. Batch-queue systems are not developed to natively support the coordinated scheduling of jobs – which in...
As the Internet became a popular source of information, more and more people are using the Internet in their everyday life. Therefore, for the servers that maintain web page sites get a lot of transactions and to maintain a stable environment, a lot of web sites have more than one server for these transaction requests. A common architecture to balance the transactional load is by using a L7 switch...
Relaying and orthogonal frequency division multiple access (OFDMA) are the accepted technologies for emerging wireless communications standards. The activities in many wireless standardization bodies and forums, for example IEEE 802.16 j/m and LTE-Advanced, attest to this fact. The availability or lack thereof of efficient radio resource management (RRM) could make or mar the opportunities in these...
WiBro is defined as a subset of the IEEE 802.16 standard and is developed based on the mobile WiMAX. WiBro delivers wireless data with a high transfer rate to provide mobile broadband services. However, it is necessary to consider radio resources efficiency due to limited resources. In this paper, we propose frequency assignment (FA) load balancing algorithm in order to use resources efficiently,...
A cluster Web-server system can be deployed to support high request rates to Web application server (WAS) in Internet-banking. The domain name system (DNS) servers dispatch the client requests among the Web-servers through the URL-name to IP-address mapping mechanism. In this paper, we propose a cluster Web-server system arranged in the multiple logical ring connections, in which the DNS is integrated...
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