Cooperation and parallelism are means for increasing efficiency of search. However, these aspects become a downside, when do not use good strategy for cooperation and parallelism so that to remedy this. We propose to ...
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ISBN:
(纸本)9780769532639
Cooperation and parallelism are means for increasing efficiency of search. However, these aspects become a downside, when do not use good strategy for cooperation and parallelism so that to remedy this. We propose to take these aspects into account by studying, choice of the strategy of cooperation and parallelism. Firstly, In this paper, we present a new algorithm specifically designed for solving distributed Constraint Satisfaction Problems (DisCSPs), and based on these concepts. then, we prove the soundness and completeness of this method, give some experimental results, and evaluate our method against existing methods. Secondly, we argue the possibility of extension of this mechanism to another model.
the traffic in IP networks has increased, and the diversification of services has advanced in recent years. therefore, network carriers request services that they can provide as soon as possible and want to use large ...
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ISBN:
(纸本)9780769529134
the traffic in IP networks has increased, and the diversification of services has advanced in recent years. therefore, network carriers request services that they can provide as soon as possible and want to use large scale networks for Next-Generation Network technologies. there is two kinds of problems. First is a taking a long time to develop new services. Second is a problem stemming from the processing of routing protocols using Interior Gateway Protocol in large scale IP networks such as carrier networks. As a solution for those problems, this paper presents a functionally distributed transport network architecture on NGN and a method to map routing functions to control-plane servers and routers where a routing process, performs route computation and distribution for multiple routers collectively. For the communication mechanism between routers and servers, the ForCES architecture model proposed in IETF is utilized. this paper also presents a route computation method using a link-state database that is configured based on suppressed representation of a network where a whole subnetwork is regarded as a router.
Following the ecological parameters variation is important keeping in mind the end goal to decide on the nature of our environment. this paper aims at detecting and detailing the changes in the environmental parameter...
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ISBN:
(纸本)9781538644300
Following the ecological parameters variation is important keeping in mind the end goal to decide on the nature of our environment. this paper aims at detecting and detailing the changes in the environmental parameters. Environmental monitoring applications based on cloud computing makes use of sensors to help in protecting environmental conditions by checking parameters like temperature, air quality, earthquake and so on. the utilization of present day advances such as the single-board computers can encourage and give much more functionalities to cloud. the significant areas that cover the above said applications are home, industries, buildings and so forth. this is the way toward observing some of the modules of environment and thus providing the features to the admins and clients. It causes the specialists to screen the states of the work in an organization or industry from remote areas and to take prompt measures.
the growth of the Internet and the advances in networking technologies demand for new forms of distributedcomputing, such as large-scale, highly decentralized computing and mobile computing. However, such forms of di...
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ISBN:
(纸本)9806560612
the growth of the Internet and the advances in networking technologies demand for new forms of distributedcomputing, such as large-scale, highly decentralized computing and mobile computing. However, such forms of distributedcomputing require new adaptive and flexible middlewares and frameworks able to exploit logical mobility and to support programmable coordination infrastructures. this paper presents a free, customizable Java-based programming framework for the development of highly dynamic distributed applications based on a computational model that extends an "active object" model by introducing the "mobile active object" concept in order to support a multi paradigm design approach. In particular, mobile active objects are autonomous network-aware entities or mobile agents which coordinate to one another through on-demand installable interaction spaces featured by events.
One of the most attractive features considered by the recent LTE-A standard is the introduction of femtocells in its main architecture. Rapidly, femtocell technology has been recognized as a potential solution to offl...
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ISBN:
(纸本)9781457720147
One of the most attractive features considered by the recent LTE-A standard is the introduction of femtocells in its main architecture. Rapidly, femtocell technology has been recognized as a potential solution to offload cellular networks since its deployment is expected to grow up considerably in the near future. However, the small coverage of femtocells may lead to frequent handoffs that need permanent support of the core network. Hence, to ensure seamless handovers through such networks, local mobility management remains an important task to be addressed. In this paper, we propose an efficient X2-based local mobility scheme that allows mobile users to perform handovers with minimum signaling load compared to the mobility procedures proposed in the 3GPP LTE-A standard.
As computer networks rapidly increase in size and speed, Internet-distributed systems such as P2P, volunteer computing, and Grid systems are increasingly common. A precise and accurate characterization of Internet res...
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ISBN:
(纸本)9781424425785
As computer networks rapidly increase in size and speed, Internet-distributed systems such as P2P, volunteer computing, and Grid systems are increasingly common. A precise and accurate characterization of Internet resources is important for the design and evaluation, of such Internet-distributed systems, yet our picture of the Internet landscape is not perfectly clear. To improve this picture, we measure and characterize the time dynamics of availability ire a large-scale Internet-distributed system with over 110,000 hosts. Our characterization focuses on identifying patterns of correlated availability. We determine scalable and accurate clustering techniques and distance metrics for automatically detecting significant availability patterns. By means of clustering, we identify groups of resources with correlated availability that exhibit similar time effects. then, we show how these correlated clusters of resources can be used to improve resource management for parallel applications in the context of volunteer computing.
this paper describes a design alternative for organizing shared (data) objects in a distributed memory system. Shared objects are organized based on concepts derived from the fields of object-oriented programming and ...
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ISBN:
(纸本)3540422935
this paper describes a design alternative for organizing shared (data) objects in a distributed memory system. Shared objects are organized based on concepts derived from the fields of object-oriented programming and applied to the philosophy of a distributed shared memory system. Inheritance is implemented through an object hierarchy in which each object inherits information from the ancestor objects, located higher in the hierarchy tree. All other object oriented programming concepts are preserved or adapted to the philosophy of the proposed system. To the best of our knowledge, no similar DSM systems have been proposed by now.
the Mobile Agent paradigm can increase the flexibility in the creation of distributed applications (and the restructuring of sequential applications for distributed systems), and can in particular provide with a robus...
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ISBN:
(纸本)3540422935
the Mobile Agent paradigm can increase the flexibility in the creation of distributed applications (and the restructuring of sequential applications for distributed systems), and can in particular provide with a robust framework for managing dynamical workload balancing. In this paper we show how the restructuring of a sequential code implementing an irregularly structured application, a combinatorial optimization performed with Branch & Bound (B&B) technique, with adoption of the mobile agent model, allows for yielding a dinamically load-balanced distributed version. the application of the mobile agent model is discussed, with respect to the solutions adopted for knowledge sharing, communication, load balancing, and termination condition.
Recently, virtualization attracts a lot of attention from server-side and client-side applications, even on embedded systems. Virtualization is adopted on client-side machines to enhance both user experience and colla...
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ISBN:
(纸本)9780769548432;9781467330848
Recently, virtualization attracts a lot of attention from server-side and client-side applications, even on embedded systems. Virtualization is adopted on client-side machines to enhance both user experience and collaboration with cloud servers. the characteristic of client-side virtualization makes it significantly different from the traditional virtualization for high-performance servers. For example, in many related projects of server-side virtualization, they usually rely on a specific operating system (OS) for the management of virtual machines. However, not all client-side users are familiar withthe specific OS and, more specifically, the applications and device drivers running on it. therefore, we propose a friendly framework called F-VT, which can replace the specific OS with any other OS friendly to users. To prove its feasibility, we develop a prototype to manage virtual machines on Windows XP by combining both paravirtualization and pass-through techniques. We also conduct experiments on network device to evaluate performance. the results show that F-VT can achieve about 96% performance with about 0.2% overhead as compared with native network devices.
A crucial challenge in the implementation of cooperative protocol is how to assign relay nodes properly. In this paper, we address the relay assignment issue in the wireless networks where the source nodes, destinatio...
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ISBN:
(纸本)9781467324809
A crucial challenge in the implementation of cooperative protocol is how to assign relay nodes properly. In this paper, we address the relay assignment issue in the wireless networks where the source nodes, destination nodes and relay nodes are randomly distributed in a large area. Without any kind of central controller, we try to solve the relay assignment problem in a distributed manner withthe local information. Based on this network model, we developed a distributed Genetic Algorithm (DGA) based scheme to pursue a better system capacity compared with other distributed algorithms. We also presented a brief discussion and analysis on the DGA algorithm. At last, extensive simulations show that the DGA outperforms other distributed algorithms with obvious improvement of the system capacity and converges fast.
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