13,738 research outputs found

    An Overview of Mobile Ad Hoc Networks for the Existing Protocols and Applications

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    Mobile Ad Hoc Network (MANET) is a collection of two or more devices or nodes or terminals with wireless communications and networking capability that communicate with each other without the aid of any centralized administrator also the wireless nodes that can dynamically form a network to exchange information without using any existing fixed network infrastructure. And it's an autonomous system in which mobile hosts connected by wireless links are free to be dynamically and some time act as routers at the same time, and we discuss in this paper the distinct characteristics of traditional wired networks, including network configuration may change at any time, there is no direction or limit the movement and so on, and thus needed a new optional path Agreement (Routing Protocol) to identify nodes for these actions communicate with each other path, An ideal choice way the agreement should not only be able to find the right path, and the Ad Hoc Network must be able to adapt to changing network of this type at any time. and we talk in details in this paper all the information of Mobile Ad Hoc Network which include the History of ad hoc, wireless ad hoc, wireless mobile approaches and types of mobile ad Hoc networks, and then we present more than 13 types of the routing Ad Hoc Networks protocols have been proposed. In this paper, the more representative of routing protocols, analysis of individual characteristics and advantages and disadvantages to collate and compare, and present the all applications or the Possible Service of Ad Hoc Networks.Comment: 24 Pages, JGraph-Hoc Journa

    HOW INNOVATIVE TECHNOLOGY CAN BE USEFUL FOR THE CRISIS MANAGEMENT : NOKIA SAVING LIVES (NSL) CASE

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    Innovative technology includes LTE connected drones with payloads, portable LTE network and portable data center for data analysis and storage for emergency and rescue situations. Portable LTE network can be set up anywhere even where the network does not exist which helps rescuers to get information at the right time to save the lives from disaster. Disasters are unpredictable and might affect the infrastructures and put the lives into danger. In such a scenario, an innovative technical solution is useful to save time during the critical period where life and death of people depend on a fraction of second. A literature review identified different phases of disaster management and showed a use case of drones and LTE network, challenges and solutions in natural disaster situations The thesis presents the Nokia Saving lives (NSL) case which includes the analysis of Nokia innovative technical solution to manage the disaster which was deployed in the Philippines live demo on 23rd Nov 2018. This research also shows how three different parties (Nokia, Smart and Philippine Red Cross) collaborate together with their own expertise to manage the disaster. The use case of LTE connected drones and portable LTE network was developed based on mixed research approach (both qualitative and quantitative) to develop a framework for organizations to manage the disaster by using the Nokia portable technology. The deeper understanding of real-time data from LTE connected drones in support of portable LTE network will further enable humanitarian actors and other non-governmental organizations to take effective measures in the disaster relief operations

    Data center resilience assessment : storage, networking and security.

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    Data centers (DC) are the core of the national cyber infrastructure. With the incredible growth of critical data volumes in financial institutions, government organizations, and global companies, data centers are becoming larger and more distributed posing more challenges for operational continuity in the presence of experienced cyber attackers and occasional natural disasters. The main objective of this research work is to present a new methodology for data center resilience assessment, this methodology consists of: • Define Data center resilience requirements. • Devise a high level metric for data center resilience. • Design and develop a tool to validate and the metric. Since computer networks are an important component in the data center architecture, this research work was extended to investigate computer network resilience enhancement opportunities within the area of routing protocols, redundancy, and server load to minimize the network down time and increase the time period of resisting attacks. Data center resilience assessment is a complex process as it involves several aspects such as: policies for emergencies, recovery plans, variation in data center operational roles, hosted/processed data types and data center architectures. However, in this dissertation, storage, networking and security are emphasized. The need for resilience assessment emerged due to the gap in existing reliability, availability, and serviceability (RAS) measures. Resilience as an evaluation metric leads to better proactive perspective in system design and management. The proposed Data center resilience assessment portal (DC-RAP) is designed to easily integrate various operational scenarios. DC-RAP features a user friendly interface to assess the resilience in terms of performance analysis and speed recovery by collecting the following information: time to detect attacks, time to resist, time to fail and recovery time. Several set of experiments were performed, results obtained from investigating the impact of routing protocols, server load balancing algorithms on network resilience, showed that using particular routing protocol or server load balancing algorithm can enhance network resilience level in terms of minimizing the downtime and ensure speed recovery. Also experimental results for investigating the use social network analysis (SNA) for identifying important router in computer network showed that the SNA was successful in identifying important routers. This important router list can be used to redundant those routers to ensure high level of resilience. Finally, experimental results for testing and validating the data center resilience assessment methodology using the DC-RAP showed the ability of the methodology quantify data center resilience in terms of providing steady performance, minimal recovery time and maximum resistance-attacks time. The main contributions of this work can be summarized as follows: • A methodology for evaluation data center resilience has been developed. • Implemented a Data Center Resilience Assessment Portal (D$-RAP) for resilience evaluations. • Investigated the usage of Social Network Analysis to Improve the computer network resilience

    Network of European Facilities I: European Network of Crisis Management Laboratories (ENCML)

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    This policy report focuses on the Network of European Facilities. It draws attention to requirements to initiate the network, methods to carry out experiments and to how the activities of the ENCML will feed into the Disaster Risk Management Knowledge Centre (DRMKC)JRC.E.1-Disaster Risk Managemen
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