LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 22

Search options

  1. Article ; Online: Comparison of Upgrading Infrastructure Optimal in Next Generation Wireless Network using GA and ACO techniques

    Dac-Nhuong Le

    International Journal of Information and Network Security (IJINS), Vol 3, Iss 2, Pp 72-

    2014  Volume 82

    Abstract: A problem of upgrading to the Next Generation Wireless Network (NGWN) is backward compatibility with pre-existing networks. In this paper, we propose new Genetic Algorithm and Ant Colony Optimization Algorithm to optimal of upgrading infrastructure in ... ...

    Abstract A problem of upgrading to the Next Generation Wireless Network (NGWN) is backward compatibility with pre-existing networks. In this paper, we propose new Genetic Algorithm and Ant Colony Optimization Algorithm to optimal of upgrading infrastructure in NGWN. The NGWN topology has two levels in which mobile users are sources and both base stations and base station controllers are concentrators. My objective function is multi-object based on the sources to concentrators connectivity cost as well as the cost of the installation, connection, replacement, and capacity upgrade of infrastructure equipment. I evaluate the performance of my algorithms with data randomly generated. Numerical experiment results show that my algorithms is the best approach to solve this problem.
    Keywords Electronic computers. Computer science ; QA75.5-76.95 ; Instruments and machines ; QA71-90 ; Mathematics ; QA1-939 ; Science ; Q
    Subject code 006
    Language English
    Publishing date 2014-04-01T00:00:00Z
    Publisher Institute of Advanced Engineering and Science
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

    More links

    Kategorien

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  2. Article ; Online: A New Ant Colony Optimization Algorithm Applied to Optimizing Centralized Wireless Access Network

    Dac-Nhuong Le

    International Journal of Information Technology and Computer Science , Vol 6, Iss 4, Pp 30-

    2014  Volume 36

    Abstract: ... connecting the MSCs to the LE called by the optimal centralized wireless access network. Numerical results ...

    Abstract The wireless access networks design problem is formulated as a constrained optimization problem, where the goal is to find a network topology such that an objective function is optimized, subject to a set of constraints. The objective function may be the total cost, or some performance measure like utilization, call blocking or throughput. The constraints may be bounds on link capacities, cost elements, or some network performance measure. However, the optimization problem is too complex. In this paper, we propose a novel Ant Colony Optimization (ACO) algorithm to finding the total cost of connecting the BSs to the MSCs, and connecting the MSCs to the LE called by the optimal centralized wireless access network. Numerical results show that performance of our proposed algorithm is much better than previous studies.
    Keywords Wireless Access Network ; Base Station ; Mobile Switching Center ; Ant Colony Optimization ; Electronic computers. Computer science ; QA75.5-76.95 ; Instruments and machines ; QA71-90 ; Mathematics ; QA1-939 ; Science ; Q
    Subject code 006 ; 000
    Language English
    Publishing date 2014-03-01T00:00:00Z
    Publisher MECS Publisher
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

    More links

    Kategorien

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  3. Article ; Online: DDoS Attack Defense in Next Generation Networks using Private Security Policy

    Dac-Nhuong Le

    International Journal of Information and Network Security (IJINS), Vol 3, Iss

    2014  Volume 3

    Abstract: The Distributed Denial of Service (DDoS) attacks have not been around with any significance for very long over the history of ICT. However, this problem is evolving quickly, and it is becoming increasingly hard to grasp a global view of the problem. ... ...

    Abstract The Distributed Denial of Service (DDoS) attacks have not been around with any significance for very long over the history of ICT. However, this problem is evolving quickly, and it is becoming increasingly hard to grasp a global view of the problem. Particularly for Next Generation Network (NGN), that will provide advanced services, such as Quality of Service (QoS) guarantees to users and their applications. In this paper, we focus to analysis challenges DDoS prevention in NGN and propose a defense method using private security policy. The efficiency of our proposed method was also proved in the experiment with NS2. DDoS attack is controlled effectively by the private security policy the bandwidth of the regular traffic would be maintained
    Keywords Electronic computers. Computer science ; QA75.5-76.95 ; Instruments and machines ; QA71-90 ; Mathematics ; QA1-939 ; Science ; Q
    Language English
    Publishing date 2014-06-01T00:00:00Z
    Publisher Institute of Advanced Engineering and Science
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

    More links

    Kategorien

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  4. Article ; Online: The Red Colobuses Monkey

    Wijdan Jaber AL-kubaisy / Mohammed Yousif / Belal Al-Khateeb / Maha Mahmood / Dac-Nhuong Le

    International Journal of Computational Intelligence Systems, Vol 14, Iss

    A New Nature–Inspired Metaheuristic Optimization Algorithm

    2021  Volume 1

    Abstract: The presented study suggests a new nature–inspired metaheuristic optimization algorithm referred to as Red Colobuses Monkey (RCM) that can be used for optimization problems; this algorithm mimics the behavior related to red monkeys in nature. In ... ...

    Abstract The presented study suggests a new nature–inspired metaheuristic optimization algorithm referred to as Red Colobuses Monkey (RCM) that can be used for optimization problems; this algorithm mimics the behavior related to red monkeys in nature. In preparation for proving the suggested algorithm's advantages, a set of standard unconstrained and constrained test functions is employed, sixty–four of identified test functions utilized in optimization were applied as benchmarks for checking the RCM performance. The solutions have also been upgrading their positions based on the optimal solution, which was reached thus far. Also, RCM can replace the worst red monkey by the best child found so far to give an extra enhancement to the solutions. Also, comparative performance checks with Biogeography–Based Optimizer (BBO), Artificial–Bee–Colony (ABC), Particle Swarm Optimization (PSO), and Gravitational Search Algorithm (GSA) were done. The acquired results showed that RCM is competitive in comparison to the chosen metaheuristic algorithms.
    Keywords Red colobuses monkey ; Optimization ; Metaheuristic ; Particle swarm optimization ; Electronic computers. Computer science ; QA75.5-76.95
    Language English
    Publishing date 2021-03-01T00:00:00Z
    Publisher Springer
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

    More links

    Kategorien

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  5. Article ; Online: Optimizing the CMTS to Improve Quality of Service in Next Generation Networks based on ACO Algorithm

    Dac-Nhuong Le

    International Journal of Computer Network and Information Security , Vol 5, Iss 4, Pp 25-

    2013  Volume 30

    Abstract: In this paper, we focus on the network topological design for providing Quality of Service (QoS) in Next Generation Network (NGN) and propose an effective Ant Colony Optimization (ACO) algorithm to solve the capacitated minimum spanning tree (cMTS) ... ...

    Abstract In this paper, we focus on the network topological design for providing Quality of Service (QoS) in Next Generation Network (NGN) and propose an effective Ant Colony Optimization (ACO) algorithm to solve the capacitated minimum spanning tree (cMTS) problem in dynamic environment. To improve QoS of communication network with considering the network provisioning capability and dynamic environment, we formulate this problem with minimizing the communication cost (as a kind of performance measures for network’s QoS). Our objective functions are determined by pheromone matrix of ants satisfies capacity constraints to find good approximate solutions of cMST problems. Numerical experiments show that our algorithm have achieved much better than recent researches.
    Keywords Capacitated Minimum Spanning Tree (cMTS) ; Communication Network ; Quality of Service (QoS) ; Next Generation Network ; Ant Colony Optimization ; Electronic computers. Computer science ; QA75.5-76.95 ; Instruments and machines ; QA71-90 ; Mathematics ; QA1-939 ; Science ; Q ; DOAJ:Computer Science ; DOAJ:Technology and Engineering
    Language English
    Publishing date 2013-04-01T00:00:00Z
    Publisher MECS Publisher
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

    More links

    Kategorien

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  6. Article ; Online: A Comparatives Study of Gateway Placement Optimization in Wireless Mesh Network using GA, PSO and ACO

    Dac-Nhuong Le

    International Journal of Information and Network Security (IJINS), Vol 2, Iss 4, Pp 292-

    2013  Volume 304

    Abstract: In this paper, I study the challenging problem of optimizing gateway placement for throughput in Wireless Mesh Networks. I compare my study ofGenetic Algorithm (GA), Ant Colony Optimization (ACO) and Particle Swarm Optimization (PSO) to solve the optimal ...

    Abstract In this paper, I study the challenging problem of optimizing gateway placement for throughput in Wireless Mesh Networks. I compare my study ofGenetic Algorithm (GA), Ant Colony Optimization (ACO) and Particle Swarm Optimization (PSO) to solve the optimal gateway placement in Wireless Mesh Networks problem. I generate the locations of gateway randomly and independently and choose the router with the highest weight as potential location for gateway placement use multi-traffic-flow weight. In the my algorithms based on GA and PSO, I calculate the fitness value of each scheme and update them step by step with the best method to quickly find the optimal. With ACO algorithm, I calculate the probability and pheromone values of ants will choose to go from current gateway i to next client j. After each iteration, the pheromone values are updated by all the number of ants that have reached to the destination successfully and found the optimal solution.Numerical results show that the proposed algorithm has achieved much better than previous studies.
    Keywords Electronic computers. Computer science ; QA75.5-76.95 ; Instruments and machines ; QA71-90 ; Mathematics ; QA1-939 ; Science ; Q
    Subject code 600
    Language English
    Publishing date 2013-08-01T00:00:00Z
    Publisher Institute of Advanced Engineering and Science
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

    More links

    Kategorien

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  7. Article ; Online: PSO and ACO Algorithms Applied to Optimization Resource Allocation to Support QoS Requirements in NGN

    Dac-Nhuong Le

    International Journal of Information and Network Security (IJINS), Vol 2, Iss 3, Pp 216-

    2013  Volume 228

    Abstract: Next Generation Network (NGN) is the backbone of the overall network architecture based on IP network, supporting different access network technologies. This integrated wireless system will have to handle diverse types of traffics, such as data, voice, ... ...

    Abstract Next Generation Network (NGN) is the backbone of the overall network architecture based on IP network, supporting different access network technologies. This integrated wireless system will have to handle diverse types of traffics, such as data, voice, and multimedia, etc. NGN will provide advanced services, such as Quality of Service (QoS) guarantees, to users and their applications. In this paper, I have studied a pricing scheme for next generation multiservice networks and formulated the optimal resource allocation in a network/service node, given the QoS requirements of each service class that the network element serves. The non-linear pricing model responds well to changes of the characteristics in the input traffic, pricing parameters and QoS requirements. Furthermore, I proposed two new Particle Swarm Optimization and Ant Colony Optimization algorithms to solve it. Numerical results show that my proposed algorithms are easy and efficient to any number of service classes.
    Keywords Electronic computers. Computer science ; QA75.5-76.95 ; Instruments and machines ; QA71-90 ; Mathematics ; QA1-939 ; Science ; Q
    Subject code 303
    Language English
    Publishing date 2013-02-01T00:00:00Z
    Publisher Institute of Advanced Engineering and Science
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

    More links

    Kategorien

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  8. Article ; Online: Improving Genetic Algorithm to Solve Multi-objectives Optimal of Upgrading Infrastructure in NGWN

    Dac-Nhuong Le

    International Journal of Intelligent Systems and Applications, Vol 5, Iss 12, Pp 53-

    2013  Volume 63

    Abstract: A problem of upgrading to the Next Generation Wireless Network (NGWN) is backward compatibility with pre-existing networks, the cost and operational benefit of gradually enhancing networks, by replacing, upgrading and installing new wireless network ... ...

    Abstract A problem of upgrading to the Next Generation Wireless Network (NGWN) is backward compatibility with pre-existing networks, the cost and operational benefit of gradually enhancing networks, by replacing, upgrading and installing new wireless network infrastructure elements that can accommodate both voice and data demand. In this paper, I propose a new genetic algorithm based on a combination of two populations to solve multi-objective optimization infrastructure upgrade problem in NGWN. Network topology model has two levels in which mobile users are sources and both base stations and base station controllers are concentrators. My objective function is the costs of connection from sources to concentrators such as the cost of the installation, connection, replacement, and capacity upgrade of infrastructure equipment. I generate two populations satisfies constraints and combine its to build solutions and evaluate the performance of my algorithm with data randomly generated. The experimental results show that this approach is appropriate and effective Finally, I have applied this algorithm to planning of upgrade infrastructure in telecommunication networks in Haiphong city.
    Keywords Next Generation Wireless Network ; Network Design ; Capacity Planning ; Genetic Algorithm ; Multi-Objectives Optimal ; Two-populations ; Electronic computers. Computer science ; QA75.5-76.95 ; Instruments and machines ; QA71-90 ; Mathematics ; QA1-939 ; Science ; Q ; DOAJ:Computer Science ; DOAJ:Technology and Engineering
    Subject code 006
    Language English
    Publishing date 2013-11-01T00:00:00Z
    Publisher MECS Publisher
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

    More links

    Kategorien

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  9. Article ; Online: Optimizing QoS for Multimedia Services in Next Generation Network Based on ACO Algorithm

    Dac-Nhuong Le

    International Journal of Information Technology and Computer Science , Vol 5, Iss 10, Pp 30-

    2013  Volume 38

    Abstract: In Next Generation Network (NGN), the backbone of the overall network architecture will be IP network, supporting different access network technologies and types of traffics. NGN will provide advanced services, such as Quality of Service (QoS) guarantees, ...

    Abstract In Next Generation Network (NGN), the backbone of the overall network architecture will be IP network, supporting different access network technologies and types of traffics. NGN will provide advanced services, such as Quality of Service (QoS) guarantees, to users and their applications. Factors affecting the QoS in NGN are speech encoders, delay, jitter, packet loss and echo. The negotiation and dynamic adaptation of QoS is currently considered to be one of the key features of the NGN concept. In this paper, I propose a novel Ant Colony Optimization algorithm to solve model of the optimal QoS for multimedia services in the NGN. Simulation results show that my new approach has achieved near optimal solutions. Comparison of experimental results with a recently researches shows that the proposed algorithm is better performance and it can meets the demand of the optimal QoS for multimedia services in NGN.
    Keywords Quality of Service ; Multimedia Services ; QoS Matching ; Next Generation Networks ; Ant Colony Optimization ; Electronic computers. Computer science ; QA75.5-76.95 ; Instruments and machines ; QA71-90 ; Mathematics ; QA1-939 ; Science ; Q ; DOAJ:Computer Science ; DOAJ:Technology and Engineering
    Subject code 004
    Language English
    Publishing date 2013-09-01T00:00:00Z
    Publisher MECS Publisher
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

    More links

    Kategorien

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  10. Article ; Online: A New Genetic Algorithm for the Optimal Centralized Wireless Access Network

    Dac-Nhuong Le

    International Journal of Information and Network Security (IJINS), Vol 2, Iss 2, Pp 129-

    2012  Volume 137

    Abstract: ... to the LE called by the optimal centralized wireless access network. Numerical results show that performance ...

    Abstract The wireless access networks design problem is formulated as a constrained optimization problem, where the goal is to find a network topology such that an objective function is optimized, subject to a set of constraints. The objective function may be the total cost, or some performance measure like utilization, call blocking or throughput. The constraints may be bounds on link capacities, cost elements, or some network performance measure. However, the optimization problem is too complex. In this paper, we propose a new genetic algorithm (GA) to finding the total cost of connecting the BSs to the MSCs, and connecting the MSCs to the LE called by the optimal centralized wireless access network. Numerical results show that performance of our proposed algorithm is much better than previous studies
    Keywords Electronic computers. Computer science ; QA75.5-76.95 ; Instruments and machines ; QA71-90 ; Mathematics ; QA1-939 ; Science ; Q
    Language English
    Publishing date 2012-12-01T00:00:00Z
    Publisher Institute of Advanced Engineering and Science
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

    More links

    Kategorien

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

To top