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In mobile ad hoc networks, the status of the network changes over time due to the movement of terminals, the battery level of terminals, and so on. To construct assurance networks, it is necessary to consider requirements such as dependability, security, and adaptability against changes in the network. We had proposed a routing method, which is referred to as RSR (Route-Split Routing) for mobile ad...
Multiple Channel Design (MCD) has been adopted widely in wireless networks to increase throughput and reliability with relatively less energy consumption. Due to physical restrictions of sensor nodes, applying multiple radio channels in sensor networks poses significant challenges, particularly on energy consumption. To address such challenges, we propose an energy-aware MCD scheme called SmartChannel...
The dynamic and shared nature of wireless medium imposes an adverse barrier to supporting QoS for video streaming applications in wireless networks. In this paper, we investigate a case study of video streaming in a wireless mesh network to obtain important observations on the factors which impact video quality in multihop wireless mesh networks. Based on our analysis of the case study, we propose...
One-way delay (OWD) is an important measurand for network management. It can indicate routing problems, network congestion, and is useful for tracking down application problems to network effects. While active measurements deliver high accuracy, measuring OWD actively on all paths of large networks results in high effort. Thus, passive measurements are attractive. Our approach for measuring OWD is...
Cognitive Radio Networks (CRNs) are emerging as a viable solution for exploiting the available spectrum and solving overcrowding in the operating bands. Several dimensions in the process of identification, management and routing need to be handled to overcome the challenges associated with the management of CRNs. A very important topic in achieving an effective and flexible management solution is...
We consider wireless mesh networks where some of the wireless routers also play a role of gateways to the internet. The assumed cognitive ability of the routers' radios is a cost efficient manner to increase available bandwidth but requires an adaptive bandwidth management mechanism to deal with dynamics of primary users' activities. To cope with this issue we propose an economic framework for adaptation...
WIA-PA is a standard of wireless networks for industrial-process automation, which is proposed by Industrial Wireless Alliance of China. Network manager is an integral role of the WIA-PA network. In this paper, we first look closely into the architecture of WIA-PA and the responsibility of network manager. More specifically, we set our focus on the schemes and algorithms involved in the process of...
Wireless Sensor Networks are gaining popularity due to the fact that they offer low-cost solutions for a variety of application areas. However, these networks are highly susceptible to attacks, due to both the open and distributed nature of the network, as well as the limited resources of the nodes, which dictate the implementation of sophisticated security frameworks. Addressing this challenge in...
With the rapid development of IPv6 network, constructing a router-level topology of IPv6 is helpful for network management, network simulation, protocol design, etc. As same as IPv4, the well-known IPv6 topology discovery tool, traceroute6, also brings an important problem named alias resolution. In this paper, we present one novel heuristic method, called Route Positional Method (RPM), for IPv6 alias...
Energy saving and ensuring robust data collection are the big subjects in realization of wireless sensor networks. In the intermittent receiver-driven data transmission (IRDT) protocol, which aims to save energy and get high reliability, communication between nodes commences when multiple receiver nodes transmit their own IDs intermittently and a sender node receives them. In this paper, we focused...
In this paper, we propose a new dynamic energy efficient routing scheme for wireless sensor networks. Based on the dynamic reconfiguration approach, the proposed scheme can provide network adaptability while enhancing the network efficiency. In addition, our distributed control paradigm has low complexity, making it practical for real sensor network management. Simulation results indicate the superior...
Problems of Wireless Sensor Networks (WSN) caused in the laboratory are predictable, and easy to resolve. While in the deployment and management phases, a number of factors in the environment raise more problems that are difficult to predict or simulation than in laboratory condition. To effective manage and monitor those problems, an effective management mechanism is needed, which analysis the problems...
The following topics are dealt with: wireless networking; network optimization; service management; visualization and P2P; cloud management; information modeling; performance and fault management; resource allocation & control; IMS/SIP; IT management; traffic flows, sampling, and classification; routing; intrusion detection and fault management; resource management; WLAN and ad hoc networks; policy-based...
One of the most fundamental management aspects of the Future Internet is the representation of management and operational data. The vast majority of languages and data structures used by network device manufacturers, such as SNMP-based designs and Command Line Interfaces, are data-oriented and are incapable of representing semantics. In addition, such languages have no ability to represent business...
Robustness and reliability are critical issues in network management. To provide resiliency, a popular protection scheme against network failures is the simultaneous routing along multiple disjoint paths. Most previous protection and restoration schemes were designed for all-or-nothing protection and thus, an overkill for data traffic. In this work, we study the Reliable Adaptive Multipath Provisioning...
The scope of this paper is to compare existing techniques proposed to manage real time (RT) communications in wireless sensor networks. MAC, network or cross layer solutions are presented and discussed in order to draw up a global view of system designs. Identifying drawbacks of existing works allows drawing future directions concerning QoS guaranteeing data delivery under time constraints.
Translucency in WDM networks appears as a trade-off between the low cost of full transparency and the high signal quality provided by full opacity. On the one hand, transparent networks undergo various transmission impairments due to optical components deployed in the network. On the other hand, opaque networks remain very expensive due to electrical 3R regeneration (Re-amplifying, Re-shaping, and...
In Wireless Sensor Networks, mostly nodes are deployed in random fashion and it has to be ensured that a backbone network should be connected at any given point of time to maintain connectivity. The selection of these backbone nodes plays a vital role while deciding the topology as by carefully selecting backbone nodes, the forwarding energy consumption can be reduced. The topology control in wireless...
In view of the dense and complex space network topologies envisioned for the future, the management of congestion control is a prominent issue that deserves a particular attention. Given the challenging peculiarities of interplanetary environments, this paper focuses on the advantages offered by storage-based routing and on potentials of implementing Random Early Detection (RED) and Explicit Congestion...
Delay Tolerant Networks (DTNs) are able to provide communication services in challenged networks where the end-to-end path between the source and destination does not exist. In order to increase the probability of delivery, DTN routing mechanisms may require nodes in the network to store and carry messages in their local buffer and replicate many copies. When the limited buffer is consumed, choosing...
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