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Software-Defined Network (SDN) allows a centralized controller to globally plan packets forwarding according to the operator's objectives. It may require more forwarding rules, and multi-path routing which is allowed in SDN to improve network utilization and throughput means more forwarding rules. However, the forwarding table in TCAM-based SDN switch is an important but limited resource. With this...
In this paper, we propose a new routing algorithm which calculates bandwidth-delay constrained routes in the fast and efficient manner. The algorithm is designed for the software-defined backbone networks, where the control plane is separated from the data plane and logically centralized. Besides providing the required quality of service (QoS), the algorithm aims to maximize utilization of network...
Sensor nodes depend on power source, but they deplete rapidly. The major issues of Wireless Sensor Network (WSN) are its energy source constraints. We are able to solve this issue by using clustering architecture. In this paper we study about various clustering techniques used in WSN. The large-scale deployment of WSNs and the need for data aggregation resolve this issue mainly. Clustering is best...
In this paper we analyzed suitability of different routing algorithms for establishing bandwidth-delay constrained traffic tunnels in SDN backbone networks. Bandwidth rejection ratio was used as indicator of algorithm's ability to efficiently utilize network resources. Through set of simulations on two real backbone topologies we showed that network topology can affect algorithm's performance, and...
Admission control is an important component to control the acceptance of new calls without degrading the Quality of Service (QoS) of the existing calls in the wireless mesh network. Two types of calls are existing in the network which are the new and handoff calls, in order to increase the admission rate for both types of calls a multi-homing admission and mobility management algorithm is proposed,...
This paper presents an implementation of new QoS algorithm (SPPA, Sync- Pre-empted Probability Algorithm) for IntServ-aware MPLS network under windows platform. The algorithm, which comprises of optimal LSPs (Label Switching Paths) selection and the network resource allocation, is injected into the ingress router to verify the feasibility. This algorithm avoids the congestion in network traffic and...
Pub/Sub model with the characteristics of loose coupling, fully information sharing, many-to-many communication and flexible resources reorganization is suitable for Message-Oriented Middleware's information exchanging on Telemetry and Command(TT&C) computers. According to the disadvantage of traditional model of message-Oriented Middleware(point-to-point, message queue, shared memory), An architecture...
The Internet is rapidly to the across network domain service delivery platform evolution, at the same time, existing based on the content of the Internet payment method is lack of the guarantee of quality of service. The future of the Internet research, to solve the current issues in the current network is put forward a few promising ideas. Such as, federations across network domain and end-to-end...
Routing and Wavelength Assignment (RWA) is the most concern in wavelength routed optical networks. This paper proposes a novel dynamic RWA scheme inspired by the idea of binary quadratic programming (BQP) formulation for the static RWA problem. Subsequently, a heuristic algorithm namely QP routing and wavelength assignment (QP-RWA) is proposed. In this method, links wavelength occupancy information...
With the rapid development of Wireless Sensor Networks (WSNs), besides the energy efficient, Quality of Service (QoS) supported and the validity of packet transmission should be considered under some circumstances. In this paper, according to summing up LEACH protocol's advantages and defects, combining with trust evaluation mechanism, energy and QoS control, a trust-based QoS routing algorithm is...
Ant colony optimization algorithm is widely used in various NPC problems for the global optimization, self learning ability and other characteristics, and achievements were made in WSNs field. Based on the study of Ant colony algorithm, in this paper, we propose a new energy-effective QoS routing algorithm. The algorithm is to speeds up the convergence of ant colony algorithm by using SNGF to optimize...
Secure routing issues, as a crucial research direction of security is emergent and significant in WSN. The existing QoS routing protocol ignores the security design. A secure QoS routing algorithm based on ACO is designed in this paper. This algorithm combines ant colony optimization algorithm with credit evaluation mechanism effectively. In order to achieve good security performance, the creditworthiness...
Now-a-days the Most of the Computer systems work in a network and the routing of the packets efficiently and pace fully is required to maintain the performance of the system. The performance of the system may vary from user to user as simple routing can work for simple transferring but as the new era techniques of come into existence new parameters came into existence like the bandwidth requirement...
To solve anycast routing problem with multiple QoS constraints, a improved anycast routing algorithm based on simplified particle swarm optimization algorithm and diversity strategy is presented. Firstly, the algorithm simplified the complexity of standard PSO algorithm and improved the convergence velocity extraordinarily by dynamically changing the inertia weight. Then, a mutation operator and diversity...
Exploiting the broadcast nature of wireless channels, transmitted packets “skip ahead” to receiving nodes farther downstream along an existing, established mesh routing path. Packets are thereby able to more quickly advance through a mesh network towards their destination. This occurs on a packet-by-packet basis and is advantageous even if the underlying path (at that moment) has been optimized. Analysis...
QoS Routing Algorithm is a routing algorithm for finding the shortest path that satisfies the QoS requirements of the end users. While finding the shortest path this uses some of improved ideas for effectively finding the shortest path with required QoS measures. Exactly the QoS routing algorithm is a kind of multi constrained routing algorithm where more than one link components are taken into considerations...
We investigate the challenging problem of joint topology design and load balancing in FSO networks. Important factors such as FSO link characteristics, cost constraints, traffic characteristics, traffic demand, and QoS requirements are considered in the problem formulation, along with objective functions of network-wide average traffic load and delay. We develop a fast heuristic algorithm to provide...
Future spatial network will be a large-scale wireless communication network with dynamic topology, where current routing protocols have been found unsuitable for use. Although CCSDS designed SCPS-NP protocol for spatial network several years ago, they could not definitely offer a point-to-point routing algorithm. To resolve the problem of SCPS-NP routing, this paper analyzed general networking specifications...
Several routing protocols for mobile ad hoc networks work efficiently only in bidirectional networks. Unidirectional links may exist in a real network due to variation in transmission power of different nodes, noise or other signal propagation phenomena, and heterogeneity in transmission hardware of nodes in the network. We introduce a sub-layer called Modified AODV (ad-hoc on demand distance vector)...
Wireless Sensor Networks (WSNs) are highly distributed networks consisting of a large number of tiny, low-cost, light-weight wireless nodes deployed to monitor an environment or a system. Each node in a WSN consists of three subsystems: the sensor subsystem which senses the environment, the processing subsystem which performs local computations on the sensed data, and the communication subsystem which...
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