The decentralized control scheme for routing in current IP networks has been questioned, and a centralized routing scheme has been proposed as an alternative. In this paper, we compare the convergence of centralized control scheme with decentralized link-state routing protocols. We first identify the components of the convergence time. Thereafter, we study how to achieve fast routing convergenc...

Most of the existing autonomous robot systems have a centralized hierarchical control architecture. In such robot systems, all planning, execution control, and monitoring tasks are performed by a single control unit on a defined level. In case of an error that occurs during the execution, this central control unit has the complete knowledge about the past executed actions and is able to reason ...

In recent years, cloud computing has become a popular option for number of different businesses sectors. It is paradigm employed to deliver range services, such as sharing resources via the Internet. Security issues in necessitates need mechanism keep system safe and reliable. An access control one that permits or denies services. This paper presents survey models Cloud Computing. Several exist...