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Cloud computing is used to provide memory and processing unit over the internet on pay-per-use basis. During the initial stage, the cloud computing environment faced complex problems due to multiplexing number of requests with available resources. The current state of the art is researchers have numerous solutions to resolve issues in handling CPU and RAM but, to the best of our knowledge; they have...
In this article we propose a proactive scheme that predicts the average queue size, using Forward Linear prediction scheme Recursive Least Square(RLS) and performs Flow Control by the adjustment of TCP window dynamically as per the predicted Queue Size. It is an approach to Congestion Control to improve the network level and user level performance of Voice data over dynamically varying Mobile Ad-hoc...
With the development of Service-Oriented technologies, the amount of Web services grows rapidly. QoS-Aware Web service recommendation can help service users to design more efficient service-oriented systems. However, existing methods assume the QoS information for service users are all known and accurate, but in real case, there are always many missing QoS values in history records, which increase...
Due to the very nature of modern day Smartphone's and tablets, users of such devices will often travel from an area with strong mobile signal to a weaker area. Travelling from a Strong Signal Area (SSA) to a Weak Signal Area (WSA) causes a significant drop in the mobile network bandwidth available to the device. This causes Quality of Service (QoS) problems for video streams over mobile networks....
This paper presents a prediction-based dynamic resource allocation approach for web applications called CRAMP (Cost-efficient Resource Allocation for Multiple web applications with Proactive scaling). The proposed approach provides automatic deployment and proactive scaling of multiple simultaneous web applications on a given Infrastructure as a Service cloud in a shared hosting environment. It monitors...
Cloud computing gets more and more popular because of its abilities on offering flexible dynamic IT infrastructure, QoS (Quality of Service) guaranteed computing environments and configurable software services. Cloud computing supports three service models: SaaS (Software as a Service), PaaS (Platform as a Service), and IaaS (Infrastructure as a Service). PaaS provides users with an application development...
The development of cloud technologies allows the implementation of scalable, versatile, and customized systems, constructed on-demand. This allows more efficient use of computing resources, improving the revenue of the system and enhancing the Quality of Service (QoS) received by users while minimizing the power consumption of the machines. Several research works conclude that in order to efficiently...
The provision of Quality of Service (QoS) in Grids (systems made of heterogeneous computing resources geographically dispersed) is still a challenging task that needs the attention of the research community. Since reservations of resources may not always be possible, another possible way of enhancing the QoS perceived by Grid users is by performing meta-scheduling of jobs in advance, where jobs are...
Dynamic spectrum management is a promising solution for network operators to efficiently utilise the limited radio spectrum and guarantee operator's profit by increasing capacity as well as generating more spectrum opportunities for opportunistic use. This paper presents a novel algorithm for efficient spectrum management to optimise spectrum utilisation between two sharing UMTS cellular operators...
Optimal assigning jobs to resources is an important problem in grid computing. Now grid scheduling policies are mostly traditional heuristic algorithms for scheduling n independent tasks on m processors in early finishing time. However grids have developed to wide area, heterogeneous and non autonomous environments, business objective also became crucial for the success of the scheduling. Therefore...
Services composition technology provides a promising way to create a new service in services-oriented architecture (SOA). However, some challenges are hindering the application of services composition. One of the greatest challenges for composite service developer is how to select a set of services to instantiate composite service with quality of service (QoS) assurance across different autonomous...
With the increased deployment of WLAN access points (AP), the importance of IEEE 802.11x standard network is also increasing. Mass deployment of WLANs offers the advantage of increased QoS support for multimedia traffic by using an intelligent vertical handover technique combined with an advanced admission control algorithm. In this paper we analyze the performance of three different dynamic load...
The major issue related to the realization of multipath network is the design of suitable dynamic adjustment algorithm of traffic allocation. The design challenge is to guarantee the various qualities of service requirements for all traffic, special the loss rate while minimizing the cost function. In this paper a novel traffic allocation algorithm based on time series prediction and PSO (particle...
Long Term Evolution (LTE) has being standardized by the 3rd generation partnership project (3GPP) as the evolution of WCDMA. Different from the conventional mobile communication technologies that deliver voice traffic through circuit switched networks, in LTE, all kinds of traffic are transferred through packet switched networks based on Internet Protocol (IP). In order to provide Quality of Service...
P2P storage systems have a lot of attractive advantages, such as self-organizing, scalability, robust and fault-tolerant. Unfortunately, there are some problems in real network conditions, especially, when considering asynchronous wide-area networks, where messages may be delayed indefinitely and nodes may fail. So, failure detector is one of basic components to build a reliable P2P storage systems...
Workflow management systems (WfMS) allow organizations to streamline and automate business processes and reengineer their structure. One important requirement for this type of system is the management and computation of the quality of service (QoS) of processes and workflows. Currently, a range of Web processes and workflow languages exist. Each language can be characterized by the set of patterns...
To coordinate the various access technologies in the 4G-communication system, intelligent vertical handoff algorithms are required. This paper mainly deals with a novel vertical handoff decision algorithm based on fuzzy logic with the aid of grey theory and dynamic weights adaptation. The grey prediction algorithm (GPA) takes 4 sampled received signal strengths as input parameters, and calculates...
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