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Nowadays there is an increasing need for a general paradigm which can simplify network management and further enable network innovations. Software Defined Networking (SDN) is an efficient way to make the network programmable and reduce management complexity, however existing SDN solutions do not realize the full potential of SDN because of their lack of scoping in network management. In response to limitations of current Software Defined Networking (SDN) management solutions, we propose a recursive approach to enterprise network management, where network management is done through managing various Virtual Transport Networks (VTNs) over different scopes (i.e., regions of operation). Our approach offers a generalized and structured framework to realize the full potential of SDN using recursive scoped management, and our VTN-based approach provides communication service with explicit Quality-of-Service (QoS) support for applications via transport flows. Each VTN involves all mechanisms (e.g., addressing, routing, error and flow control, resource allocation) needed to support such transport flows. Based on this approach, we design and implement a management architecture, which recurses the same VTN-based management mechanism for enterprise network management. Our experimental results show that our management architecture achieves better performance demonstrated through unicast and multicast video applications.

The residential gateway is a key device in the provision of Internet access to a household or to a small office. Managing a residential network nowadays means configuring the functionality provided by the residential gateway, which is often a task that requires a certain level of technical expertise that most residential users lack. Internet Service Providers sometimes address this usability problem by managing the residential gateway from a central location and offering a way of configuring simple functions such as the password of the Wi-Fi network through a web-based application. In this paper a new user-centric management architecture is proposed, to increase the active engagement of residential users in the management tasks of their own networks, improving the usability of the network and facilitating the provision of new services. In this approach, residential network management applications are split in two components: a front-end handling user interaction and running on the user's preferred device (PC, laptop, smartphone); and a back-end built on top of both the Software Defined Networking (SDN) and the Network Functions Virtualization (NFV) paradigms. The solution takes advantage of the fine-grained control of network traffic and the convenience to communicate network events provided by SDN and the outsourcing of traditional network functions like routing or NAT from the residential gateway to a cloud-based infrastructure managed by the Internet Service Provider. In this paper the advantages and challenges of this approach are discussed, based on the results obtained from a proof of concept system that has been developed to evaluate the feasibility and performance of the proposal. The residential network usability is improved by implementing a new user-centric management model.Residential network management applications (RENEMA apps) involve users in managing their own networks.Residential network services (RENESEs) expedite and simplify the development of RENEMA apps.The virtualized management and networking domain (vMANDO) concept hosts the SDN and NFV components.The architecture allows avoiding the manufacturer lock-in effect.

In recent Wireless Sensor Network environment, battery energy conservation is one of the most important focus of research. The non-maintainable wireless sensor nodes need modern innovative ideas to save energy in order to extend the network life time. Different strategy in wireless sensor routing mechanism has been implemented to establish the energy conservation phenomenon. In earlier days, the nodes are dissipating maximum energy to communicate with each other(flooding) to establish the route to destination. In the next evolution of this research area, a clustering mechanism introduced which confirms the energy saving over the flooding mechanism. Neural Network is an advanced approach for self-clustering mechanism and when applied on wireless sensor network infrastructure, it reduces the energy consumption required for clustering. Neural network is a powerful concept with complex algorithms and capable to provide clustering solutions based on the wireless sensor network nodes properties. With the implementation of Neural Network on Wireless Sensor Network resolves the issues of high energy consumption required for network clustering. The authors propose a self-silence wireless sensor network model where sensor nodes change the sensing and transmitting mechanism by making self-silent in order to conserve the energy. This concept is simulated in neural network based wireless sensor network infrastructure of routing methodology and the authors observe that it extends the network life time. The mathematical analysis and simulation study shows the improved performance over the existing related neural network based wireless sensor routing protocols. Furthermore, the performance & related model parameters data set analysis provides the respective dependent relation information.

Since today's networks use traditional centralized management systems, the management became costly with the growth in the number of network equipments and available services. It became then clear that it was necessary to distribute the central management responsibilities throughout the network equipments. This article proposes an autonomic decision system with learning capabilities based on Artificial Intelligence concepts, to be used by network equipments in mesh-network environments without the need of a central knowledge. Considering a specific case of QoS routing, this system is able to establish bandwidth-aware communication paths between pairs of nodes in a distributed approach, without the complete knowledge of the network and the available bandwidth of its links. To develop this system in a real network an architecture has been specified and built, denote as DistArch. This architecture provides all the functionalities to perform distributed autonomic decisions in large-scale networks. The results of this approach show that, by cooperating with neighbour network agents, even without a full knowledge of the network state, it is possible to establish bandwidth-aware communication paths as optimal as the ones obtained with a central decision approach that contains full network information, being able to react to network changes with a fast convergence.

Software-defined networking (SDN) is a softwarization technology of networks that can optimize processes and operation costs and bring new values to infrastructures. The issue of reliability, however, becomes more complex in SDN due to new and multi-lateral network domains, and poses many critical challenges on the existing network reliability mechanisms in order to achieve the same reliability services. In this paper, we first identify and illustrate reliability challenges in a control path network that lies between a control plane network and a data plane network to connect them through either an in-band SDN or an out-of-band traditional network. We then observe a number of distinctive control path reliability problems. Accordingly, we propose and develop a control path management framework to enhance SDN reliability addressing the observed issues. It includes several control path reliability algorithms that enhance performance, network protocols that simplify management of control path reliability, as well as a novel control message classification and prioritization system that serves as a fundamental approach to improve scalability and then reliability for SDN. Recognizing the control path as a network and understanding its potential and practical reliability problems enable us to provide effective solutions that prior approaches fall short of. We validate our proposed management framework through extensive experiments through a real network system as well as numerical analyses.

Recent technological advances have rendered storage a readily available resource, yet there exist few examples that use it for enhancing network performance. We revisit in-network storage and we evaluate its usage as an additional degree of freedom in network optimization. We consider the network design problem of maximizing the volume of end-to-end transferred data and we derive storage allocation (placement) solutions. We show that different storage placements have different impact on the performance of the network and we introduce a systematic methodology for the derivation of the optimal one. Accordingly, we provide a framework for the joint optimization of routing and storage control (usage) in dynamic networks for the case of a single commodity transfer. The derived policies are based on time-expanded graphs and ensure maximum performance improvement with minimum possible storage usage. We also study the respective multiple commodity problem, where the network link capacities and node storage resources are shared by the different commodities. A key advantage of our methodology is that it employs algorithms that are applicable to both centralized as well as to distributed execution in an asynchronous fashion, and thus, no tight synchronization is required among the various involved storage and routing devices in an operational network. We also present an extensive performance evaluation study using the backbone topology and actual traffic traces from a large European Internet Service Provider, and a number of synthetic network topologies. Our results show that indeed our approach offers significant improvements in terms of delivery time and transferred traffic volume.

Enforced from February 18th, 2013, the network separation system has been promoted as a solution to block the leak of important information in public institution or in private, which has been increased continuously. Under pretext of continuity, the entire finance system has operated the integrated network of intranet and Internet before the network separation system. Such operational environment led more internal and external threats due to development of APT or malwares and carelessness of insider, and the government has prepared the high level security solution called the network separation. Through the network separation, based on the guideline of financial authority, the intranet and the Internet have been separated to protect the corporate and private information from the malware infection or hacking through the external Internet. In this thesis, through the concept of network separation and the case of establishment of network separation in the financial field, the structure is to be evaluated, and through the safety of system, efficiency of management, and safety operation solution of data system, the optimized network separation system in the financial field is to be designed. Furthermore, the network separation system is categorized into the establishment of network separation solution, establishment of network connection solution, establishment of network, and establishment of infrastructure for information protection to be evaluated. Therefore, the system establishment and connection through detailed analysis of regulation are required, and the assurance of security and performance and safety of the network separation system through the integration of conventional security system and new establishment and process are studied.

Policy-Based Network Management (PBNM) is one of the approaches used by network administration groups for Quality of Service (QoS) and administration on the internet. This paper seeks to propose the adoption of a Policy Creation Model for Policymaking in some organizations. The model will then be applied to a real scenario Botswana International University of Science and Technology (BIUST) network. A combination of technical computer skills, effective network monitoring and a workable policy helps in attaining effective bandwidth management by the users. This study extends one of our researches in network traffic monitoring in BIUST network.

Provided is a network method for enhanced P2P multimedia transmission. The method according to the present invention comprises the steps of: dividing a large-capacity video content to be transmitted into equal-sized scenes; transmitting, by a user computer in a user group, a request to a tracer server for watching the video content; transmitting, by a tracker server, a list of video content servers and collaborative user computers; participating, by the user computer, in a reception user group by referring to the collaborative user computer list; and receiving, by the user computer, the scene from the computer in the reception user group. The user obtains transmission efficiency through sharing. In particular, each user computer is grouped such that the computer of the preceding group shares multimedia content with the user computer of the following group.

Nowadays, with the growth of heterogeneity of network equipment and software, and involved a variety of advanced network technology, the complexity of computer network have rapidly increased. Especially demands for high-performance network service in advanced data-intensive scientific research are dramatically increased. In order to cope with the network performance issue, this paper proposes the end-to-end (ETE) network performance management framework based on case-based reasoning with the case library and multi-agent integrated with perfSONAR as well as large-scale network flow monitoring. It provides a sophisticated framework for both network operator and user to systemically identify ETE network performance issues that are detected, diagnosed and recovered. The real cases are modeled and implemented into the casebase in the real experimental environment, a national research network of Korea. To verify the proposed framework, validation of the cases in the casebase is demonstrated.

End-to-end transmission is an essential pattern in current Internet. It had brought obvious conveniences and potential hazard simultaneously. New network technology provides plenty of opportunities to avoid the harmful influences. After reviewing the identifier-based network, a candidate solution of future network, we proposed a smart collaborative connection management scheme for improving the dependability. Comparing with the conventional approaches, our scheme can protect the hosts via intermediate network equipments. During transmission process, the current usage pattern will not be influenced. Traditional unicast can be easily and smoothly enabled. The details of the scheme design are presented via four perspectives of connection identifier, i.e., communication mode, generation, distribution, and deployment. Then the supporting approaches of multipath transport, service migration, network mobility, P2P distribution, and application layer multicast are carefully investigated. The results of implementation and validation illustrate that the performances of new scheme are acceptable. We expect that this paper could provide a compatible and effective solution for both current and future Internet.

The intrusion detection systems, firewalls and other security devices provide a guarantee for the safe operation of the network, but with the wide application of network, virus, hackers and other security incidents are increasing, these security devices will send tens of thousands of a warning in a very short period of time, the network management personnel is difficult to find useful information from these massive alarms. In addition, with the increasingly large scale network, mobile network, data management, data related to SMS, MMS message service system, single security device cannot detect all intrusions, so we must consider how to make these equipments work harmoniously. In this paper, based on the above problems, the mobile data network security integrated management system is studied, and the research and implementation of security event management mechanism is discussed in detail. The event management proposed in this paper can be regarded as an extension of the concept of network management, which enriches the content of the five functions of network management. In addition, the traditional network management and system management are two independent concepts. The two management systems can be combined together through the event management, so that the network security operation can be further improved. The purpose of security event modeling is to format the events from different event sources to facilitate subsequent processing. In this paper, the object oriented modeling method is adopted, which is scalable, and at the same time, the difference of all kinds of events is fully considered. For the description of the model, this paper uses the XML language, which is universal. Harm of computer virus on the network security management is more and more big, the characteristics of computer virus and the typical symptoms and its harmfulness are analyzed, and the security of mobile communication network is analyzed. The proposed system modification virus prevention. Implementation of general security management system in mobile data network is the focus of this article, mainly from the three aspects of the audit log management, security event monitor and account password management in the mobile data network involving multiple business systems in the implementation of integrated security management system. In this paper, we adopt rule based hierarchical system architecture, the coupling degree of each module is relatively loose, and it has great flexibility in the deployment.

Given the widespread deployment of proprietary network functions (NFs), many network management functions (such as testing and policy compliance) need accurate NF models to ensure correctness and reliability. However, because of their proprietary and complex nature, these NFs lack a standardized behavior model. This article reviews existing NF models and modeling approaches, proposes generic modeling methodologies to create standard NF models, and presents the model's applications in network management tasks.

Technology trends such as Software-Defined Networking (SDN) are transforming networking services in terms of flexibility and faster deployment times. SDN separates the control plane from the data plane with its centralised architecture compared with the distributed approach used in other management systems. However, management systems are still required to adapt the new emerging SDN-like technologies to address various security and complex management issues. Simple Network Management Protocol (SNMP) is the most widespread management protocol implemented in a traditional Network Management System (NMS) but has some limitations with the development of SDN-like services. Hence, many studies have been undertaken to merge the SDN-like services with traditional network management systems. Results show that merging SDN with traditional NMS systems not only increases the average Management Information Base (MIB) polling time but also creates additional overheads on the network. Therefore, this paper proposes a dynamic scheme for MIB polling using an additional MIB controller agent within the SDN controller. Our results show that using the proposed scheme, the average polling time can be significantly reduced (i.e., faster polling of the MIB information) and also requires very low overhead because of the small sized OpenFlow messages used during polling.

The proliferation of smart objects and their connectivity have contributed to the realization of the Internet of Things (IoT) paradigm, offering a plethora of applications and services in many sectors of our lives. There are a number of communication architectures put forth to realize commercial IoT. Among other architectures, programmable networking solves most of the network management problems through Software Defined Networks (SDN). In SDN, the control plane is separated from the data plane and hence can be a perfect choice for IoT where things have to be managed from different perspectives such as communications, resource allocation, energy consumption, and so on. Addressing the problems of traditional networks through SDN indirectly advocates for its use in IoT environments. However, the "softwarization" of the network, i.e. SDN, poses new challenges to the network security. Among other security issues, lack of trust between the SDN controller and network management application (application that controls the network behavior) is one of the key security problems in SDN that may jeopardize IoT security. To fill the gaps, in this paper, we propose a trust establishment framework for SDN. The main idea is to establish direct trust between OpenFlow SDN controller and the applications. Our results show that by using the proposed trust management framework, financial losses could be considerably reduced for the networks.

Network virtualization has enabled new business models by allowing infrastructure providers to lease or share their physical network. A fundamental management problem that cloud providers face to support customized virtual network (VN) services is the virtual network embedding. This requires solving the (NP-hard) problem of matching constrained virtual networks onto the physical network. In this paper we present VINEA, a policy-based virtual network embedding architecture, and its system implementation. VINEA leverages our previous results on VN embedding optimality and convergence guarantees, and it is based on a network utility maximization approach that separates policies (i.e., high-level goals) from underlying embedding mechanisms: resource discovery, virtual network mapping, and allocation on the physical infrastructure. We show how VINEA can subsume existing embedding approaches, and how it can be used to design novel solutions that adapt to different scenarios, by merely instantiating different policies. We describe the VINEA architecture, as well as our object model: our VINO protocol and the API to program the embedding policies; we then analyze key representative tradeoffs among novel and existing VN embedding policy configurations, via event-driven simulations, and with our prototype implementation. Among our findings, our evaluation shows how, in contrast to existing solutions, simultaneously embedding nodes and links may lead to lower providers’ revenue. We release our implementation on a testbed that uses a Linux system architecture to reserve virtual node and link capacities. Our prototype can be also used to augment existing open-source “Networking as a Service” architectures such as OpenStack Neutron, that currently lacks a VN embedding protocol, and as a policy-programmable solution to the “slice stitching” problem within wide-area virtual network testbeds.

Nowadays, the prevailing use of networks based on traditional centralized management systems reflects on a fast increase of the management costs. The growth in the number of network equipments and services reinforces the need to distribute the management responsibilities throughout the network devices. In this approach, each device executes common network management functionalities, being part of the overall network management platform. In this paper, we present a Unified Distributed Network Management (UDNM) framework that provides a unified (wired and wireless) management network solution, where further different network services can take part of this infrastructure, e.g., flow monitoring, accurate routing decisions, distributed policies dissemination, etc. This framework is divided in two main components: (A) Situation awareness, which sets up initial information through bootstrapping, discovery, fault-management process and exchange of management information; (B) Autonomic Decision System (ADS) that performs distributed decisions in the network with incomplete information. We deploy the UDNM framework in a testbed which involves two cities ($$\approx$$ź250 km between), different standards (IEEE 802.3, IEEE 802.11 and IEEE 802.16e) and network technologies, such as, wired virtual grid, wireless ad-hoc gateways, ad-hoc mobile access devices. The UDNM framework integrates management functionalities into the managed devices, proving to be a lightweight and easy-respond framework. The performance analysis shows that the UDNM framework is feasible to unify devices management functionalities and to take accurate decisions on top of a real network.

The evolution of the Internet and fiber-optic technologies has created new opportunities in terms of availability of different network services. The increasing demand for capacity, combined with strong reliability requirements, defines new challenges in the area of network management and design. Today, several users share the limited network resources, which may lead to frequent link congestions in communication networks. Therefore, we propose two effective solutions to respond to link congestions in centrally managed flow-oriented IP networks, such as software-defined networks. We verify their performance through simulation using a real backbone network topology and conclude that as long as enough resources are available in the network, the presented algorithms have the potential to reduce the number of fully loaded links in the network.

The Internet landscape is gradually adopting new communication paradigms characterized by flexibility and adaptability to the resource constraints and service requirements, including network function virtualization (NFV), software-defined networks, and various virtualization and network slicing technologies. These approaches need to be realized from multiple management and network entities exchanging information between each other. We propose a novel information exchange management as a service facility as an extension to ETSI's NFV management and orchestration framework, namely the virtual infrastructure information service (VIS). VIS is characterized by the following properties: 1) it exhibits the dynamic characteristics of such network paradigms; 2) it supports information flow establishment, operation, and optimization; and 3) it provides a logically centralized control of the established information flows with respect to the diverse demands of the entities exchanging information elements. Our proposal addresses the information exchange management requirements of NFV environments and is information-model agnostic. This paper includes an experimental analysis of its main functional and non-functional characteristics.

Updating a network is an essential and continual task in the management of today’s softwarized networks. When applying updates on distributed network elements, desired network properties, such as drop- and loop-freeness, might be transiently violated. Although being crucial, update consistency has yet been less considered in network management. In this paper, we argue for incorporating the particularities of update consistency into the reconfiguration process of continuous network management. We present a generic management architecture allowing for an appropriate selection of an update mechanism and its parameters based on expected inconsistency effects. We investigate update consistency for the case of multicast routing and show in an extensive analysis why simultaneous drop- and duplicate-freeness is not possible. We present an update procedure for multicast routing updates that identifies critical update steps, which are fed back into the reconfiguration process, along with a lightweight approach that allows for the selection of an update strategy, preventing either drops or duplicates. Furthermore, we present an optimization of an existing powerful, but resource-intensive update approach as well as an approach for in-network filtering of duplicates.

In recent years, there has been a marked increase in the use of wireless sensor networks in various environments such as crisis areas, military operations, and monitoring systems. These networks do not use a fixed network infrastructure and therefore they are a popular choice for highly dynamic environments. One of the main concerns in these networks is the topology management issue, which the clustering method is a subfield for that. The main objective of clustering methods is optimizing the energy consumption. This paper proposes a new clustering protocol, which uses many parameters such as the activity history of each node, local and general state of nodes and their resources condition to determine the best cluster heads and members of each cluster that can increase the network lifetime, fair resource consumption and network coverage.

There is a major shift in the Internet towards using programmable and virtualized network devices, offering significant flexibility and adaptability. New networking paradigms such as software-defined networking and network function virtualization bring networks and IT domains closer together using appropriate architectural abstractions. In this context, new and novel information management features need to be introduced. The deployed management and control entities in these environments should have a clear, and often global, view of the network environment and should exchange information in alternative ways e.g. some may have real-time constraints, while others may be throughput sensitive. Our work addresses these two network management features. In this paper, we define the research challenges in information management for virtualized highly dynamic environments. Along these lines, we introduce and present the design details of the virtual infrastructure information service, a new management information handling framework that i provides logically centralized information flow establishment, optimization, coordination, synchronization and management with respect to the diverse management and control entity demands; ii is designed according to the characteristics and requirements of software-defined networking and network function virtualization; and iii inter-operates with our own virtualized infrastructure framework. Evaluation results demonstrating the flexible and adaptable behaviour of the virtual infrastructure information service and its main operations are included in the paper. Copyright © 2016 John Wiley & Sons, Ltd.

The coexistence of various protocols for current network equipment leads to extremely complex network systems, which not only limit the development of network technologies, but also cannot meet the growing demands for cloud computing, big data, and service visualization applications, just to name a few. As a new network architecture, parallel networks are expected to revolutionize this situation and meet the evolving demands for network services. The main idea of a parallel network is to leverage upon software-defined networking to construct artificial networks, and then effectively optimize the network system operations via the interactions between actual and artificial networks. The foundation of the parallel network is the theory of ACP, composed of artificial societies, computational experiments, and parallel execution. By the computational experiments and analysis of the artificial network, a control strategy based on network traffic flow can be continuously updated and tracked on a real-time basis; meanwhile, the collected operating status of the actual network can also be used to optimize the model of the artificial network. These strategies can be applied to all types of network equipment to control network operations at various levels; thus, it is possible to allocate the network resources more effectively, improve the management and utilization of resources, and then provide new network solutions to effectively address the constantly evolving network demands for network performance, scalability, and security.

NFV is promising to lower the network operator’s capital expenditure and operational expenditure by replacing proprietary hardware-based network equipment with software-based VNFs that can be consolidated into telecom clouds. In particular, NFV provides an efficient way to deploy network services using SFCs that consist of a set of VNFs interconnected by virtual links. A practical but theoretically challenging problem related to NFV management and orchestration is how to jointly optimize the topology design and mapping of multiple SFCs such that the TBC is minimized, which is called the JTDM problem. In this article, we propose a novel heuristic algorithm, Closed-Loop with Critical Mapping Feedback, to efficiently address the JTDM problem. While minimizing the TBC, we also propose scalable and reliable JTDM strategies that can significantly reduce the network reconfigurations and enhance the service reliability, respectively.

Choice-based network revenue management concentrates on importing choice models within the traditional revenue management system. Multinomial logit is a popular and well-known model which is base choice model in the revenue management. Empirical results indicate inadequacy of this model for predicting itinerary shares and more realistic models such as nested logit can be proposed for substituting it. Incorporating complex choice models in the optimization module based on statistical tests without considering the complexity of the obtained mathematical model, would lead to increase the complexity of a system without obtaining significant improvement. According to influencing the discrete choice model on the structure of optimization model, it is necessary to analyze the interaction between specific discrete choice and optimization models.In this paper, a knowledge acquisition subsystem is introduced for providing intelligence and considering the most suitable choice models. We develop the feedforward multilayer perceptron artificial neural network for forecasting revenue improvement percent obtained by using more realistic choice models. The obtained results demonstrate new system will decrease the complexity of the system simultaneously with preserving the firm’s revenue. According to the computational results, by increasing the resource restriction, the process of incorporating more realistic choice model will be more important.

Ultra-dense networking (UDN) is considered as a promising technology for 5G. In this article, we define user-centric UDN (UUDN) by introducing the philosophy of the network serving user and the "de-cellular" method. Based on the analysis of challenges and requirements of UUDN, a new architecture is presented that breaks through the traditional cellular architecture of the network controlling user. Dynamic AP grouping is proposed as the core function of UUDN, through which a user could enjoy satisfactory and secure service following her movement. Furthermore, we provide methods for mobility management, resource management, interference management, and security issues. We point out that these functions should be co-designed and jointly optimized in order to improve the system throughput with higher resource utilization, better user experience, and increased energy efficiency. Finally, future works in UUDN are discussed.

The network services today require extremely agile and mobile, however, the traditional IP infrastructures are so rigid that cannot fit services well. A way should be put forward to automate the network to improve responsiveness to change. SDN and network virtualization (NV) are two hottest approaches to make networking more automated and scalable to support virtualized and cloud environments. Network virtualization combines hardware and software network resources and network functionality into a single virtual network. SDN is created to simplify traffic management and achieve operational efficiencies by establish and exercising central control over packet forwarding. In this paper, we focus on the situation where SDN controller needs to connect two virtual networks temporarily. We put forward three algorithms to try to make this connection more effective and evaluate these three algorithms.

The rapid growth of the network traffic and the diversity of the network requirements bring network service providers new demands and challenges. In order to achieve better efficiency and resource utilization, we need to solve the problems caused by the heterogeneous network environment, such as the low resource utilization and the control and management collaboration problem of heterogeneous networks. The promotion of the software-defined network concept brings the network operators a new way of thinking to solve the problem caused by heterogeneous network environment, especially the convergence of packet and optical network. We propose a control architecture for packet and optical network convergence, including how to be compatible with the existing optical network control architecture. A series of network performance parameters have been demonstrated under various network environments on our testbed.

In cellular networks, as a result of the heterogeneous network layout, a number of community, in the entire network, micro base station district energy management issues that need to be unified management and scheduling, and combined with the flow of communication and transport business and the efficiency of energy management, the development of energy management system based on cloud computing platform, according to the system, can have better energy efficiency, realize the communication and the advantage of energy balance. This article mainly from the two aspects of theory and actual implementation of this management system research.

Network Functions Virtualization (NFV ) is an attempt to help operators more effectively manage their networks by implementing traditional network functions embedded in specialized hardware platforms in term of virtualized software instances. But, existing novel network appliances designed for NFV infrastructure are always architected on a general-purpose x86 server, which makes the performance of network functions limited by the hosted single server. To address this challenge, we propose ApplianceBricks, a novel NFV-enable network appliance architecture that is used to explore the way of consolidating multiple physical network functions into a clustered network appliance, which is able to improve the processing capability of NFV-enabled network appliances.

LTE self-organizing networks (SONs) automate several management mechanisms related to network planning, configuration, and optimization, which require network programmability at both the control plane and data plane. This requirement is a design target shared by software defined networking (SDN) and software defined radio (SDR) paradigms, which are intended to achieve open programmable and reconfigurable networks. Hence, the convergence of the programmable- control-plane nature of SDN with the programmable-data-plane nature of SDR into an SON-based architecture will complement and enhance their respective scopes. We propose an SON-based management framework that leverages programmable control and data planes, and emphasizes the need for an open and extensible protocol interface that combines the main features of current protocols such as OpenFlow, MIH, and XMPP.

As the next generation network architecture, software-defined networking (SDN) has exciting application prospects. Its core idea is to separate the forwarding layer and control layer of network system, where network operators can program packet forwarding behavior to significantly improve the innovation capability of network applications. Traffic engineering (TE) is an important network application, which studies measurement and management of network traffic, and designs reasonable routing mechanisms to guide network traffic to improve utilization of network resources, and better meet requirements of the network quality of service (QoS). Compared with the traditional networks, the SDN has many advantages to support TE due to its distinguish characteristics, such as isolation of control and forwarding, global centralized control, and programmability of network behavior. This paper focuses on the traffic engineering technology based on the SDN. First, we propose a reference framework for TE in the SDN, which consists of two parts, traffic measurement and traffic management. Traffic measurement is responsible for monitoring and analyzing real-time network traffic, as a prerequisite for traffic management. In the proposed framework, technologies related to traffic measurement include network parameters measurement, a general measurement framework, and traffic analysis and prediction; technologies related to traffic management include traffic load balancing, QoS-guarantee scheduling, energy-saving scheduling, and traffic management for the hybrid IP/SDN. Current existing technologies are discussed in detail, and our insights into future development of TE in the SDN are offered.

Software-defined networking (SDN) has emerged as a new network architecture, which decouples both the control and management planes from data plane at forwarding devices. However, SDN deployment is not widely adopted due to the budget constraints of organizations. This is because organizations are always reluctant to invest too much budget to establish a new network infrastructure from scratch. One feasible solution is to deploy a limited number of SDN-enabled devices along with traditional (legacy) network devices in the network of an organization by incrementally replacing traditional network by SDN, which is called hybrid SDN (Hybrid SDN) architecture. Network management and control in Hybrid SDN are vital tasks that require significant effort and resources. Manual handling of these tasks is error prone. Whenever network topology changes, network policies (e.g., access control list) configured at the interfaces of forwarding devices (switches/routers) may be violated. That creates severe security threats for the whole network and degrades the network performance. In this paper, we propose a new approach for Hybrid SDN that auto-detects the interfaces of forwarding devices and network policies that are affected due to change in network topology. In the proposed approach, we model network-wide policy and local policy at forwarding device using a three-tuple and a six-tuple, respectively. We compute graph to represent the topology of the network. By using graph difference technique, we detect a possible change in topology. In the case of topology change, we verify policy for updated topology by traversing tree using six-tuple. If there is any violation in policy implementation, then affected interfaces are indicated and policies that need to be configured are also indicated. Then, policies are configured on the updated topology according to specification in an improved way. Simulation results show that our proposed approach enhances the network efficiency in term of successful packet delivery ratio, the ratio of packets that violated the policy and normalized overhead.

As a promising platform for implementing various applications, a wireless sensor and actor network (WSAN) consists of many sensor and actor nodes that can cooperatively handle complex tasks. However, many issues, including nodes' mobility, the heterogeneity of capacity, topology, and energy consumption, may bring severe challenges to efficient WSAN operation. Currently, the software defined network (SDN) appears as a novel approach that is effective to manage and optimize networks in a programmable and centralized pattern. This paper studies the application framework and relevant methods for applying the SDN approach in a WSAN, with the objective of improving network's efficiency and scalability. The details of the framework include a three-layer structure, the relevant system entities, the enhanced protocol stack, and the programmable message types for cooperative communication and task execution among WSAN nodes. Based on this framework, this paper explores the relevant challenges and mechanisms for effective system management from many aspects, including mobility, energy saving, reliability maintenance, and topology construction. This paper also proposes an optimization method for scheduling decomposed tasks to relevant nodes, with an example implemented by the genetic algorithm. Next, this paper demonstrates the typical application scenarios, including military, industry, transportation, and environmental disaster monitoring. Moreover, an indoor application scenario and an outdoor application scenario are presented to demonstrate the application of the SDN-assisted communication handoff. Finally, the future trends and technical challenges for SDN in WSAN are discussed.

In network management, significant research efforts have been carried out to automate and facilitate the tasks conducted by network administrators. However, so far, none of these efforts has exploited the opportunities of jointly using the Situation Management discipline and the mashup technology for network management. This paper introduces an approach, called Rich Dynamic Mashments, to facilitate the daily work of network administrators when dealing with unexpected, dynamic, and heterogeneous situations. We have referred to as nmsits to such type of network management situations (e.g., a sudden packet loss in a core router of a network backbone and an unforeseen slowness in data transmission over a link between virtual routers) and mashments to tunable mashups that use Situation Management for conducting network management tasks. The proposed approach is made up by the models of nmsits and mashments, the mechanisms to automatically recognize nmsits and dynamically compose mashments, and the architecture supporting these models and mechanisms. We further implement a prototype of our approach and conduct an extensive analysis on networks based on the Software-Defined Networking paradigm. The analysis results have provided directions and evidence that corroborate the feasibility of using Rich Dynamic Mashments as an effective approach for network management in terms of time-recognition, time-composition, time-consuming, time-response, and network traffic.

The evolution of Software-Defined Networking (SDN) has so far been predominantly geared towards defining and refining the abstractions on the forwarding and control planes. However, despite a maturing south-bound interface and a range of proposed network operating systems, the network management application layer is yet to be specified and standardized. It has currently poorly defined access control mechanisms that could be exposed to network applications. Available mechanisms allow only rudimentary control and lack procedures to partition resource access across multiple dimensions. We address this by extending the SDN north-bound interface to provide control over shared resources to key stakeholders of network infrastructure: network providers, operators and application developers. We introduce a taxonomy of SDN access models, describe a comprehensive design for SDN access control and implement the proposed solution as an extension of the ONOS network controller intent framework.

Network function virtualization has enabled data center providers to offer new service provisioning models. Through the use of data center management software (cloud managers), providers allow their tenants to customize their virtual network infrastructure, enabling them to create a network topology that includes network functions (e.g., routers, firewalls), either chosen among the natively supported catalog or provided by third-parties. In order to deploy a ready-to-go service, providers have also to take care of pushing functional configurations into each network function (e.g., IP addresses for routers and policy rules in firewalls). This paper proposes an architecture that extends current cloud management software to enable the configuration of network functions. We propose a model-based approach that exploits the use of additional software components, i.e. translators and gateways, which are network function-agnostic, i.e. they are vendor-neutral and not specific for a particular type of network function, and do not require any change in the network functions. A prototype of this solution has been also implemented and tested, in order to validate our approach and evaluate its effectiveness in the configuration phase.

With ever growing mobile Internet and the explosion of its applications, users are experiencing abundant services from different content providers via different network service providers in the heterogeneous network. The information-centric network (ICN) advocates getting rid of the current host-centric network protocol because information dissemination rather than end-to-end communication contributes to the majority of today's network traffic. Furthermore, it is better for network entities to converge as a whole in order to take advantage of open, scalable, and smart traffic transmission. The cloud radio access network is one of the emerging architecture evolutions on the wireless side for easier infrastructure deployment and network management. Therefore, when the information-centric network meets the C-RAN in the Het-Net, it is worthwhile and consequential to integrate ICN protocol with C-RAN architecture to achieve more efficient communication and information management. Moreover, SDN has been recognized as another promising architecture evolution to achieve the flexibility and reconfigurability of dense HetNets; its inherent advantage lies in global uniform control of the wired network. Thus, any of ICN, C-RAN and SDN is the complementary to the others. In this article, we contribute to a fresh proposal for and elaboration of the integration of the ICN, CRAN, and SDN for the HetNet to achieve a win-win situation. The vision of the proposed system is demonstrated, followed by the advantages and challenges. We further present a hybrid system in a large-scale wireless heterogeneous campus network.

Marketing and Distribution Integrated System is based on GIS systems, and a unified information model of power grid equipment, basic data and topology-based systems, the use of high-tech information technology, application management and distribution line losses quarter field of network construction planning, customer outage management and other integrated information platform. Energy management system implementation ultimate goal is to achieve through intelligent system integration of existing systems be saving energy consumption and improved. In automation technology and IT based on the establishment of energy management systems, based on objective data, metallurgical, chemical, thermal, power plants and other energy consuming enterprises, energy saving most fundamental way to implement. The foundation and core of this system is that the data distribution network GIS platform, integrated measurement automation, distribution network of production, distribution network planning, distribution network automation, distribution network engineering, marketing and other systems supporting the management and reliability of power supply and distribution network planning decisions Camp with information query formulated meter reading routes and other services.

Management and automated configuration of large-scale networks is one of the crucial issues for Internet Service Providers (ISPs). Since incorrect configurations may lead to loss of an enormous amount of customer traffic, highly experienced network administrators are typically the ones who are trusted for the management and configuration of a running ISP network. In this paper, we present an online management and experimentation system with a "game" interface to train network administrators and explore what-if scenarios without having to risk the large-scale network operation. The interactive environment treats the trainee network administrators as players of a game and tests them with various failures or dynamics for real-time management and configuration of large-scale networks. To prototype the concept of "network management as a game", we modified NS-2 to establish an interactive simulation engine and connected the modified engine to a graphical user interface for traffic animation and interactivity with the player. We also conducted two user experiments using different learning methods and observed sizable improvement in the capabilities of trainees on the problem of interior gateway protocol link weight setting.

To build a flexible network than traditional transport network, the carrier ethernet technology is emerging in network industry recently and MPLS-TP technologies are being applied as a major standard technology for the carrier ethernet. However, network management technologies required to handle equipment installed in MPLS-TP network are not clear. This paper propose an efficient method to build a management network automatically without any additional configuration when network equipments are installed in MPLS-TP network. The proposed scheme reduce cost required for both equipment installation and network maintenance by minimizing configuration procedures of connecting management system with network. We evaluated the effectiveness of the proposed scheme by applying the scheme to a real MPLS-TP equipment.

The increased demand on the transport of both passengers and goods through rail systems implies higher traffic intensity and congestion on the railways, resulting in greater likelihood of accidents and also degraded passenger services. To cope with the issues, development of an integrated communication network for rails has attracted great deal of attention lately. GSM-R is such an example developed in Europe, which seems to have restrictions in providing various communication services due to network speed limit. For the reason, an LTE-based approach is under study in Korea. After the network development, operation management of the network is necessary. Design of operation management systems has been studied little and thus is the objective of this paper. To do so, a conceptual design has been carried out based on model-based approach. Specifically, a context model has first been created using the use case diagram. Then, SysML models of operational scenarios were developed for the management system. The SysML models have alternatively been expressed as EFFBD models to simulate and verify them. Consequently, the result of the conceptual system design for the operation management of the integrated wireless network is expected to be used as a basis for the detailed design later.

Service-Oriented Architecture (SOA) constructs applications by publishing services in an open network environment. In network environment individual service changes highly dynamically, it is required the system based on services to adapt to this change. But the current service management in network environment doesn’t have a good, unified management mode, management mechanism, service and quality control system, and lacks of theoretical foundation to express formal service system. In this paper, a service management framework is designed. A mechanism and method based on strategy and dynamic network environment service management are proposed. The method can effectively solve the problem of dynamic service management in network environment, and is widely used in dynamic service management based on Web services.

To support maximum number of users/applications the concept of virtualization is employed. Network virtualization deals with supporting the concurrent wired/wireless network activities and utilizing the available physical (substrate) network efficiently by implementing an ideal virtual network embedding algorithm. Mapping virtual network requests to substrate network is an important problem and is done to optimize certain characteristic parameters of the network system. Most of the virtual network mapping models consider, mapping of the network requests on a single physical network. This work proposes a model for the virtual network mapping onto multiple substrate networks with the objective to optimize the revenue for the network service providers. In the process, some other parameters such as acceptance ratio of the VN requests etc. also improve. Experimental study reinforces the efficacy of the proposed model.