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Optimizing the three most important network performance parameters i.e. Delivery probability, Overhead ratio, and Delay is challenging in Delay Tolerant Networks (DTN) due to high occurrences of network partitioning in these networks. Owing to the partitioning nature efficient routing or dissemination of messages is important in DTN. In this paper, we focused to improve the spray phase of Binary Spray...
Delay Tolerant Networks (DTNs) are wireless networks in which at any given time instance, the probability of having a complete path from a source to destination is low due to the intermittent connectivity between nodes. Because of the differences between DTNs and traditional networks, the routing strategies about DTNs can not use the traditional routing methods directly. In the paper, we propose a...
As the network service have been increased fleetly, packets in the conversion process are not resolved the forward direction by the uncontrolled situation. That means the traditional single-hop routing has not been satisfied by the increasing of the network applications. Therefore, based on multi-hop routing mechanism, a distinguish queuing which product the forwarding control mechanism could be propounded...
An on-demand electric power supply architecture in home based on quality-aware routing is proposed. In the architecture power sources and powered devices send quality parameters by which they supply or consume electric power. The network itself chooses best matching of a source and a device, and makes reservation of a path by RSVP-based QoS routing mechanism. In this paper the basic concepts and the...
In a sensor network there are many paths between a source and a destination. An efficient method to explore and navigate in the `path space' can help many important routing primitives, in particular, multipath routing and resilient routing (when nodes or links can fail unexpectedly) as considered in this paper. Both problems are challenging for a general graph setting, especially if each node cannot...
Endowing mesh routers with multiple radios is a recent solution to improve the performance of wireless mesh networks. The approaches proposed in the literature to solve the problem how to assign channels to radio have mainly focused so far on reducing interference or maximizing the throughput. To the best of our knowledge, none of such approaches attempted to save network resources for the purpose...
Path splicing is a proposed routing architecture for the Internet in which end-hosts (and intermediate routers) are empowered to change the paths their traffic uses by modifying a number of bits in the packet headers. These bits allow intermediate routers to choose alternate paths from the shortest one. To that end, this paper exposes SKWeak (Selective K Weakest links) attacks that exploit the adaptive...
A wireless mesh network (WMN) has been popularly researched as a wireless backbone for Internet access with off-the-shelf and inexpensive equipments. Nowadays, several applications like contents sharing, multicast video streaming, vehicular networks encourage to build mesh networks in urban areas. However, the deployment of WMNs in unlicensed bands of dense urban areas imposes many challenges. While...
Recently, wireless mesh networks have been proposed as a mechanism to provide alternative broadband wireless internet access. The usage of multiple radios transmitting at diverse frequency bands allows a significant increase in the capacity of such networks. However, popular Hybrid Channel Assignment strategies, which use a fixed interface for receiving and a switchable interface for transmitting...
We introduce a high-fidelity simulation model to evaluate the power consumption of computer networks derived from measured data on routers. To this end, we design and use a power consumption profiling system to parameterize the electrical power consumption of network elements in terms of data traffic. A model validation done by comparing simulation outputs for a test case with actual measurements...
With the advance of ubiquitous society including IPv6, it is expected that everything will be connected to the networking environment. Then, a ubiquitous grid networking environment (uGrid) has been proposed. In uGrid, everything from a device to a program is defined as “Service-Part”, and new mash-up services can be provided by connecting several ServiceParts. In this paper, IP Routing/Signaling-based...
Cognitive radio networks (CRN) have emerged as a promising, yet challenging, solution to enhance spectrum utilization, thanks to the technology of cognitive radios. In this work, we consider the multicast routing and channel allocation problem in cognitive radio mesh networks. Due to the potential heterogeneity in channel availability among mesh routers (MRs) and the frequency switching latency, end-to-end...
This paper describes an architecture to support QoS flows in an OpenFlow environment with a centralized `controller' and many `forwarders.' The paper primarily focuses on the analytical framework for optimization of the QoS flow routing, and the functionality needed within the controller and forwarders to efficiently support QoS. We also describe the control layer messaging between the controller...
Traditional mesh is a popular interconnection architecture for Networks-on-Chip (NoCs). However, with the trend towards larger number of cores in chip multiprocessors, it is unable to stand the fast-growing diameter and average distance in meshes. Recently, concentration and express channels are two countermeasures for that. In this paper, a new scheme called multi-mapping is proposed, which allows...
The Interconnection networks are essential elements in current computing systems. For this reason, achieving the best network performance, even in congestion situations, has been a primary goal in recent years. In that sense, there exist several techniques focused on eliminating the main negative effect of congestion: the Head of Line (HOL) blocking. One of the most successful HOL blocking elimination...
The performance of interconnection networks is heavily influenced by routing algorithms. The selection function, which decides the final output channel when a set of admissible output channels exist, is essential for an adaptive routing algorithm. Congestion is usually a major cause of performance degradation in interconnection networks. In this paper, we present a simple and efficient selection function...
In this work, we analyze the design of green routing algorithms and evaluate the achievable energy savings that such mechanisms could allow in several realistic network scenarios. We formulate the problem as a minimum energy routing optimization, which we numerically solve considering a core-network scenario, which can be seen as a worst-case for energy saving performance (as nodes cannot be switched...
In random broadcasting or dynamic broadcast, source packets that have to be broadcast to all the other nodes are generated at each node of a network or a parallel/distributed system at random instances or in an uncoordinated manner. In this paper, we propose a priority-based routing scheme, to be referred to as prioritized dominating-set broadcasting (PDB), for random broadcasting in k-ary n-cubes...
In this paper, we compare the performance of RTS/ CTS unicast against receiver-based routing (RBR) within our implementation of the T-MAC protocol and give guidelines how to configure the protocol parameters to achieve a highly reliable communication with reduced energy consumption. Using the accurate energy model integrated in our simulator, we have evaluated the performance of the RBR service and...
In this paper, we propose to tackle the design problem of two-level metropolitan Internet protocol (IP) networks with modular routers including the design of the points of presence. We first propose a model that deals with selecting the number of routers and their types to install in each point of presence, selecting the interface card types to install in each router, finding the access and the backbone...
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