Maximising the network lifetime is a challenging problem in sensor networks. This paper proposes an evolutionary clustering routing algorithm for heterogeneous wireless sensor networks (WSN). The method combines genet...
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Computer networks rely both on physical connectivity and a routing protocol responsible for computing routing paths between all network devices routing answers the question ofwhat direction each network device should ...
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Computer networks rely both on physical connectivity and a routing protocol responsible for computing routing paths between all network devices routing answers the question ofwhat direction each network device should send every incoming packet out. For any non-trivial network, it is not a simple question to answer. Therefore, there are many routing algorithms designed for different circumstances: from the simplest scenario ofa small scale single- authority local network to the gigantic Internet scenario, where each part of the network is managed by a diiferent entity In this thesis, we investigate the properties ofa certain class of routing algorithms, namely static routing. Static routing algorithms are a class of algorithms that do not require anetwork device to store any changing state in its memory during packet processing. Despite it being one ofthe simplest and most constrained class of routing methods, researchers do not understand the limits of its applicability fully yet. We focus on two ofthe most important properties - scalability and resiliency. For scalability, we design a static routing algorithm, which is aviable solution for the long standing problem ofa scalable multicast we theoretically and using large-scale simulations show the proposed algorithm can scale to a networks up to the size ofthe lnternet. Thus, we prove that static routing is highly scalable For resiliency, we embark on a systematic algorithmic study and investigate possible resiliency levels ofstatic routing algorithms in a variety cfmodels: deterministic model, probabilistic model, packet-duplication model, packet-header-mutable model. We achieve a solid theoretical boundaries ofresiliency that static algorithms can provide, and propose several highly resilient stauc routing algorithms.
The main objective of this paper is to improve the performance of MANETs with high immunity towards network attacks Grey Hole Attackers and Black Hole Attackers. In the clustered network if the elected cluster node [2...
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A real-time end-to-end routing algorithm is developed in this paper for multi-class communication networks with quality of service (QoS) requirements. The proposed algorithm is performed by means of a two-stage proced...
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The emergence of cloud computing and big data has rapidly increased the deployment of small and mid-sized data centers. Enterprises and cloud providers require an agile network among these data centers to empower appl...
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The emergence of cloud computing and big data has rapidly increased the deployment of small and mid-sized data centers. Enterprises and cloud providers require an agile network among these data centers to empower application reliability and flexible scalability. We present a software-defined inter data center network to enable on-demand scale out of data centers on a metro-scale optical network. The architecture consists of a combined space/wavelength switching platform and a Software-Defined Networking (SDN) control plane equipped with a wavelength and routing assignment module. It enables establishing transparent and bandwidth-selective connections from L2/L3 switches, on-demand. The architecture is evaluated in a testbed consisting of 3 data centers, 5-25 km apart. We successfully demonstrated end-to-end bulk data transfer and Virtual Machine (VM) migrations across data centers with less than 100 ms connection setup time and close to full link capacity utilization. (C) 2016 Optical Society of America
Driven by the forthcoming of 5G mobile communications, the all-IP architecture of mobile core networks, i.e. evolved packet core (EPC) proposed by 3GPP, has been greatly challenged by the users' demands for higher...
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Driven by the forthcoming of 5G mobile communications, the all-IP architecture of mobile core networks, i.e. evolved packet core (EPC) proposed by 3GPP, has been greatly challenged by the users' demands for higher data rate and more reliable end-to-end connection, as well as operators' demands for low operational cost. These challenges can be potentially met by software defined optical networking (SDON), which enables dynamic resource allocation according to the users' requirement. In this article, a novel network architecture for mobile core network is proposed based on SDON. A software defined network (SDN) controller is designed to realize the coordinated control over different entities in EPC networks. We analyze the requirement of EPC-lightpath (EPCL) in data plane and propose an optical switch load balancing (OSLB) algorithm for resource allocation in optical layer. The procedure of establishment and adjustment of EPCLs is demonstrated on a SDON-based EPC testbed with extended OpenFlow protocol. We also evaluate the OSLB algorithm through simulation in terms of bandwidth blocking ratio, traffic load distribution, and resource utilization ratio compared with link-based load balancing (LLB) and MinHops algorithms. (C) 2016 Optical Society of America
In this paper, we propose an ant colony-based direct communication model routing (AntDMR) algorithm aimed at wireless emergency communication system. When network infrastructure is destroyed, direct communication mode...
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routing with end-to-end Quality-of-Service (QoS) guarantees is a key to the widespread deployment of recent emerged services. Developing QoS routing algorithm in the network is an important open topic. This paper inve...
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A vehicular delay tolerant network (VDTN) is a special type of delay tolerant network (DTN), in which vehicles act as mobile nodes that are carriers of the message. It is characterized by the absence of an end-to-end ...
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Information-Centric Networking (ICN) is one of the most promising model for dealing with the cern of the current Internet scenario, that is content. In this model, either routers or user devices in the network are cap...
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