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The Internet is straining to meet demands that its design never anticipated, such as supporting billions of mobile devices and transporting huge amounts of multimedia content. The publish-subscribe Internet (PSI) architecture, a clean slate information-centric networking approach to the future Internet, was designed to satisfy the current and emerging user demands for pervasive content delivery, which...
Future network should focus more on what users want to get from the network rather than where users want to get through the network. Distributed content network equipped with storage and streaming server could provide effective and efficient content service to the users. We propose the hierarchical content management method to find the optimal content server in consideration of load balancing over...
The future power systems will develop in conjunction with the ICT technologies and infrastructure, enabling implementation of novel technologies and concepts, where information sharing and making decisions on local level will play a key role in coordination actions among different actors. The general objective of the paper is to introduce a class of distributed algorithms which can be implemented...
Enterprise networks have been built for decades, increasing in size and complexity mostly due to richer media and the rising traffic demands of applications. Although management and other techniques have been able to cope with network complexity, little attention has been paid to curb the energy consumption. We have proposed the High-level Energy-awaRe Model for bandwidth reservation in End-to-end...
One of the challenges in Multi-Radio Multi-Channel Wireless Mesh Networks is the assignment of channels to links such that connectivity is ensured and interference is minimized. Two links that are within interference range of each other could be assigned the same channel, which causes co-channel interference and decreases network throughput. In this paper, we identify the above problem in the Topology-controlled...
With a possible exhaustion of global IPv4 addresses, shifting to IPv6 is thought to be inevitable. However, when the shifting to IPv6 actually occurs, network topology could be inferred from addresses in the organization. Thus, as a means to conceal network topology, various methods, including the use of Mobile IPv6 and the setting-up of routers for host routes, are being proposed. However, redundant...
This paper presents initial work towards an architecture suitable for purpose-driven, self-growing networking as realized by distributed cognitive decision engines within the network. Starting from describing basic modules enabling for self-growing, the paper derives a logical architecture for realizing the concept at various network levels. Mapping results to the UMTS stratum model shows potential...
In this paper we propose a method to analyze and plan the allocation of gateway nodes in multidomain optical networks. The method is based on a genetic algorithm (GA), which determines the nodes with more resources to decrease the intra and interdomain blocking probabilities. The performance of the GA is compared with a network topology consisting of three domains in which the gateway nodes were selected...
Wireless mesh network (WMN) is deemed as a promising technology to provide last few miles connectivity. Multi-radio multi-channel mesh nodes are often used to increase the chance of concurrent transmission. Although IEEE 802.11b/g standards define 11 available channels, the maximum number of non-overlapping channels is only three. Most existing channel assignment schemes are based on these non-overlapping...
It is well known that the pervasive IEEE 802.11 MAC is intrinsically unfair [1, 3]. In particular, in the topology shown in Fig. 1(a), when links AB and CD both carry backlogged transmissions, the packets from sender A experience persistent collisions at node B while sender C enjoys collision-free transmission to D. Node A can transmit successfully only if it is able to “insert” its packets into the...
This paper describes results achieved within recently successfully completed EU projects CARMEN (CARrier grade MEsh Networks) and PANLABII (PAN European LABoratory for next generation networks and services). The main contribution of the CARMEN project is the design and prototype of a wireless mesh network that allows quality of service provisioning. Currently, CARMEN functionalities are evaluated...
Wireless Mesh Networks (WMNs) are primarily viewed as access networks, with traffic flowing in and out of the mesh via gateways. However, in many scenarios, point-to-point (P2P) traffic within the WMN is also important, with the approach used to handle this traffic affecting the performance of not only the P2P flows, but all other traffic as well. This work studies the handling of P2P traffic in the...
Wireless Sensor Networks (WSNs) comprise embedded sensor nodes that operate autonomously in a multi-hop topology. The challenges are unreliable wireless communications, harsh environment, and limited energy and computation resources. To ensure the desired level of service, it is essential to diagnose performance issues e.g. due to low quality links or energy depletion. This paper presents remote diagnostics...
The data link layer is used to transport the network layer's data from the source to the destination node safely. This paper designed and implemented the data link layer by the WIA-PA specification. It designed 5 events which can be triggered by a timer to implement the superframe, designed a reliable data communication method based on active timeslot table and an link transmitting queue, and achieved...
With the emergence of wireless networking paradigm, several optimization problems are showing their usefulness to the efficient design of such networks. These problem are related, among others, to optimizing network connectivity, coverage and stability. The resolution of these problems turns out to be crucial for optimized network performance. In the case of Wireless Mesh Networks (WMN), such problems...
This paper covers the analyzing performance problems found in IP networks called Autonomous System (AS), to maximize the admitted traffic flows. We present a hybrid genetic algorithm approach to optimize the summary of admitted traffic where a hybrid GA approach is combined with an order-based Genetic Algorithm and Greedy then apply the Tabu Search Algorithm to find the optimal solution. We then,...
We propose TMAC, a timestamp-ordered MAC protocol for Wireless Mesh Networks (WMNs). TMAC extends CSMA/CA by scheduling data packets based on their age. Prior to transmitting a data packet, a transmitter broadcasts a request control message appended with a timestamp to a selected list of neighbors. It can proceed with the transmission only if it receives a sufficient number of grant control messages...
Emergency communication has been intensively investigated for solving suddenly-occurred events of public safety. Wireless network can play an important role of information acquisition and command decision-making in disaster areas, so a new Wireless Emergency Communication (WEC) algorithm is proposed in this paper. This algorithm possesses the characteristics of quick, stability, low energy and high...
Based on Wireless Mesh Network (WMN), the clustering structure of Wireless Sensor Network (WSN) can be reconstructed. Then, Wireless Mesh Sensor Network (WMSN) was described by combining WSN with WMN. Adopting queuing theory, a multi-hop data transmission model for WMSN is established subsequently. A Multi-hop sleep MAC protocol for WMSN which based on effective listen time of different nodes (MSM)...
The WirelessHART standard has been specifically designed for real-time communication between sensor and actuator devices for industrial process monitoring and control. End-to-end communication delay analysis for WirelessHART networks is required for acceptance test of real-time data flows from sensors to actuators and for workload adjustment in response to network dynamics. In this paper, we map the...
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