Underwater sensor networks find applications in oceanographic data collection, pollution monitoring, offshore exploration, disaster prevention, assisted navigation, tactical surveillance, and mine reconnaissance. The enabling technology for these applications is acoustic wireless networking. UnderWater Acoustic Sensor Networks (UW-ASNs) consist of sensors and Autonomous Underwater Vehicles (AUVs) deployed to perform collaborative monitoring tasks. The objective of this research is to explore fundamental key aspects of underwater acoustic communications, propose communication architectures for UW-ASNs, and develop efficient sensor communication protocols tailored for the underwater environment. Specifically, different deployment strategies for UW-ASNs are studied, and statistical deployment analysis for different architectures is provided. Moreover, a model characterizing the underwater acoustic channel utilization efficiency is introduced. The model allows setting the optimal packet size for underwater communications. Two distributed routing algorithms are proposed for delay-insensitive and delay-sensitive applications. The proposed routing solutions allow each node to select its next hop, with the objective of minimizing the energy consumption taking the different application requirements into account. In addition, a resilient routing solution to guarantee survivability of the network to node and link failures in long-term monitoring missions is developed. Moreover, a distributed Medium Access Control (MAC) protocol for UW-ASNs is proposed. It is a transmitter-based code division multiple access scheme that incorporates a novel closed-loop distributed algorithm to set the optimal transmit power and code length. It aims at achieving high network throughput, low channel access delay, and low energy consumption. Finally, an efficient cross-layer communication solution tailored for multimedia traffic (i.e., video and audio streams, still images, and scalar sensor data) is introduced.

After the National Communications Commission lifted the ban on cross-industry, the boundaries of cable television and telecommunication services become increasingly blurred. Thereafter, cable business owners in network operations management area are facing the telecommunication industry with fierce competition. They also need to overcome the high morphological variable services with the impacting of increasingly complex processes. The Information communications in business organizations have generated problems of the information exchanging fault and the recognition process management gap. Therefore, the operational mechanism on cable network management systems becomes very important and meaningful. This study is based on system architecture and logic rule to use the structure-behavior coalescence (SBC) architecture description language (ADL). Through the design-based research (DBR) methodology, it integrates the concepts of information systems and business management, and develops a proprietary architecture tools by innovating cable televisions with architecture-oriented cable network management system model (AOCNMSM). This study also uses logical classification rules to verify the following purposes: (1) Building the network management systems model to meet the business integrated operations. (2) Combining of network management system and organizational information flow to avoid information exchange faults. (3) Excluding the potential barriers on the network management system to avoid the recognition gap of organizational management. By introducing the AOCNMSM, we allow cable business owners to view their online network easier on most environmental management issues. They shall truly achieve the integration of information systems and organizational management and enhance the service quality of cable television to create a more flawless business performance.

Integrating research from the strategic management and the supply chain management (SCM) literatures promises a fertile area of research that can enrich both areas. In this work, an attempt was made to answer the recent calls for incorporating perspectives from each field into the other. These calls were further encouraged by the new competitive landscape characterized by hypercompetition and network versus network competition. Thus, the field of Strategy, with its emphasis on gaining and sustaining competitive advantage, and SCM, with its emphasis on managing processes spanning organizational boundaries, stand to benefit greatly by this integration. The introduction chapter briefly describes what this research tried to achieve. In the supply chain management literature review chapter, the importance of managing supply chains in this era of network versus network competition is shown and the strategic demand network management (SDNM) concept is presented as an evolution of supply chain management and as a more suitable name reflecting the processes involved. In the third chapter, a selected list of supply chain management practices is presented and explained. The fourth, fifth and sixth chapters will endeavor to carry on three developments. These developments seek to integrate strategy and SCM research in three ways. In the first development, the dynamic capability perspective from the strategy field and the SDNM capability are integrated in order to suggest how demand network management enables dynamic capabilities. On the other hand, dynamic capabilities perspective were used to guide the SDNM practices. In the second development, alliance management capability from the strategy field was integrated with SDNM capability and SDNM practices to show how concepts from both areas can enrich the other. And finally the third development builds on the first two developments to explore how SDNM capability can facilitate strategic entrepreneurship (SE) and SE based boundary decisions.

This study adopts large access graph algorithm and case-base reasoning approach to generalize user access patterns and diagnose network events respectively for facilitating the network management. Large access graph (LAG) algorithm discovers the frequently inter-connections among hosts to provide an overview of network access relation. The case-based reasoning (CBR) system diagnoses the instant network events with the past experience. NetFlow log data collected from the router of the dormitory network of National Sun Yat-Sen University is used for demonstrating these two methods. The evaluation results measured by recall, precision, and accuracy show that these two mechanisms are useful to support the network administer to keep track of network access relations and diagnose the network events.

<p>This work address the adding, removing and upgrading of network elements in a computer network at run-time. This is already accomplished by Sun Microsystems Jini architecture, but we have investigated if it is possible to create a maintenance system that can handle this, using CORBA. We also want the manual intervention to be minimal. We have discovered that it is possible to create such a system, using CORBA, and that this solution also can handle upgrading a network element at run-time. This report outlines the design of this system, realizing automatic run-time network maintenance.</p>

Thesis (M.S.)--Kent State University, 2009. / Title from PDF t.p. (viewed Jan. 25, 2010). Advisor: Feodor Dragan. Keywords: greedy routing. Includes bibliographical references (p. 76-77).

Thesis (M.S. in Computer Science)--Naval Postgraduate School, March 2003. / Thesis advisor(s): Ted Lewis, Geoffrey Xie, Gurminder Singh. Includes bibliographical references (p. 89). Also available online.

ITC/USA 2012 Conference Proceedings / The Forty-Eighth Annual International Telemetering Conference and Technical Exhibition / October 22-25, 2012 / Town and Country Resort & Convention Center, San Diego, California / Network-based telemetry systems have unprecedented amounts of flexibility due to the ability to manipulate configuration during a test. As a result of this flexibility, multiple tests can be conducted in a single flight; all it takes is reconfiguration of instrumentation. However, configuration of devices can be a complex task, and dynamic configuration can be even more daunting. As such, device configuration, control, and status must be managed in a coordinated fashion. A system manager implementation that performs coordinated status and control of instrumentation in the Test Article as well as test configuration authoring is presented in this paper, the Ground Test Article Manager (GTAM), which is being developed by the integrated Network Enhanced Telemetry (iNET) program.

M. Tech. Electrical Engineering. / Discusses the question of how to prolong the life of an entire sensor network by reducing the power consumption is the most important issue in wireless sensor networks. Traditional routing schemes have not fulfilled the expectations of an optimised WSN, and as a result, new algorithms are being designed globally. One of these protocols which serve as a basis for this study is the RCRR. In this project, we present a new approach of the Relative Coordinates Rumor Routing algorithm based on a link quality awareness scheme and a modified version of the protocol with better scaling.The benefits of this study are: Proposal of a tuneable algorithm that will not only consume less power compared to the classic RR but also addresses the scalability problem encountered with the original RCRR. Proposal a better trade-off between throughput and average end-to-end delay with the use of the SMAC (compared with Rumor protocol). Avoidance of long delays in queues and saving power on retransmission of packets. Reduction of the wandering of agents during communication. Prolonging the lifetime of the network and thus offering economic, operational, and environmental benefits. Balancing link quality awareness with a topological localisation scheme to achieve better throughput.

M. Tech. Electrical Engineering. / Wireless sensor networks (WSNs) are considered to be the next generation network after the Internet. However the limited energy supply is still a serious restriction for them. Hence energy consumption is a key design criterion for the routing protocol in WSNs. Gradient-based routing (GBR) is an energy efficient routing protocol for WSNs. However, shortcomings exist in the GBR scheme, such as: (1) nodes deliver the message in a point to point manner and do not use the broadcast nature of wireless networks; (2) the nodes which are near the sink will be overused; (3) sinks use flooding to broadcast the interest messages, and hence, many duplicated packets are transmitted. To address these shortcomings, three algorithms are presented according to the problems identified above. Firstly, a competing algorithm GBR-C is proposed. Simulation results showed that GBR-C provided better results than GBR in terms of energy efficiency. Secondly, a refilling algorithm GBR-R is proposed. The simulation results revealed that compared to GBR, network lifetime was prolonged up to 63% with the GBR-R algorithm. Thirdly, a network coding algorithm, GBR-NC, is proposed. Simulation results showed that compared with GBR, GBR-NC could save up to 60% of energy when the network coding scheme N of 4 is used.