Admir Barolli | Universiteti Aleksander Moisiu (original) (raw)

Papers by Admir Barolli

Es permet l'ús personal d'aquest material. S'ha de demanar permís a l'IEEE per a qualsevol altre ... more Es permet l'ús personal d'aquest material. S'ha de demanar permís a l'IEEE per a qualsevol altre ús, incloent la reimpressió/reedició amb fins publicitaris o promocionals, la creació de noves obres col•lectives per a la revenda o redistribució en servidors o llistes o la reutilització de parts d'aquest treball amb drets d'autor en altres treballs.

2014 Ninth International Conference on Broadband and Wireless Computing, Communication and Applications, 2014

In our previous work, we presented WMN-GA (Wireless Mesh Networks-Genetic Algorithm) system. In t... more In our previous work, we presented WMN-GA (Wireless Mesh Networks-Genetic Algorithm) system. In this paper, we use WMN-GA and analyze the simulation results considering packet delivery ratio (PDR), throughput and delay metrics. For simulations, we used ns-3 simulator and Hybrid Wireless Mesh Protocol (HWMP). We evaluate the performance of WMN for Exponential and Weibull distributions by sending multiple constant bit rate (CBR) flows and different transmission rates in the network. From simulation results, we found that for 10, 20 and 30 number of connections, the PDR is less than 60% when the transmission rate is more than 1200 kbps for Exponential distribution. The PDR for Weibull distribution is higher than Exponential distribution. For different number of connections, the throughput is increased linearly with the increasing of the transmission rate. The throughput of Exponential distribution is higher than Weibull distribution. With increasing of the number of the connections and the transmission rate, the delay is increased. For 10 connections, the delay is very small until the transmission rate is 800 kbps. The delay of Exponential distribution is smaller than that of Weibull distribution.

Advances in Internet, Data and Web Technologies, 2020

The Wireless Mesh Networks (WMNs) are becoming an important networking infrastructure because the... more The Wireless Mesh Networks (WMNs) are becoming an important networking infrastructure because they have many advantages such as low cost and increased high speed wireless Internet connectivity. In our previous work, we implemented a Particle Swarm Optimization (PSO) and Hill Climbing (HC) based hybrid simulation system, called WMN-PSOHC, and a simulation system based on Genetic Algorithm (GA), called WMN-GA. Then, we implemented a hybrid simulation system based on PSOHC and distributed GA (DGA), called WMN-PSOHC-DGA. In this paper, we analyze the performance of WMNs using WMN-PSOHC-DGA simulation system considering the number of evolution steps and computation time. Simulation results show that the 8 evolution steps were enough and computation time was linearly increased with increasing of the evolution steps.

Lecture Notes in Networks and Systems, 2020

Wireless Mesh Networks (WMNs) are becoming an important networking infrastructure because they ha... more Wireless Mesh Networks (WMNs) are becoming an important networking infrastructure because they have many advantages such as low cost and increased high-speed wireless Internet connectivity. In our previous work, we implemented a Particle Swarm Optimization (PSO) based simulation system (called WMN-PSO), and a simulation system based on Genetic Algorithm (GA) (called WMN-GA), for solving node placement problem in WMNs. Then, we implemented a hybrid simulation system based on PSO and distributed GA (DGA) (called WMN-PSODGA). Moreover, we added in the fitness function a new parameter for the load balancing of the mesh routers called NCMCpR (Number of Covered Mesh Clients per Router). In this paper, we compare the simulation results using uniform and exponential distributions for 16 and 32 mesh routers. The simulation results showed that the proper number of the routers for uniform distribution is 32 and for exponential distribution is 16. Especially, uniform distribution optimized by 3...

Lecture Notes in Networks and Systems, 2021

Journal of High Speed Networks, 2021

Wireless Mesh Networks (WMNs) are gaining a lot of attention from researchers due to their advant... more Wireless Mesh Networks (WMNs) are gaining a lot of attention from researchers due to their advantages such as easy maintenance, low upfront cost and high robustness. Connectivity and stability directly affect the performance of WMNs. However, WMNs have some problems such as node placement problem, hidden terminal problem and so on. In our previous work, we implemented a simulation system to solve the node placement problem in WMNs considering Particle Swarm Optimization (PSO) and Distributed Genetic Algorithm (DGA), called WMN-PSODGA. In this paper, we compare chi-square and uniform distributions of mesh clients for different router replacement methods. The router replacement methods considered are Constriction Method (CM), Random Inertia Weight Method (RIWM), Linearly Decreasing Inertia Weight Method (LDIWM), Linearly Decreasing Vmax Method (LDVM) and Rational Decrement of Vmax Method (RDVM). The simulation results show that for chi-square distribution the mesh routers cover all me...

Journal of Ambient Intelligence and Humanized Computing, 2017

In this paper, we evaluate the performance of two WMN architectures (infrastructure/backbone WMNs... more In this paper, we evaluate the performance of two WMN architectures (infrastructure/backbone WMNs (I/B WMNs) and Hybrid WMN architectures) considering throughput, delay, jitter and fairness index metrics. For simulations, we used ns-3 and optimized link state routing. We compare the performance of distributed coordination function and enhanced distributed channel access (EDCA) for exponential and Weibull distributions of mesh clients by sending multiple constant bit rate flows in the network. The simulation results show that for exponential distribution, in case of Hybrid WMN, the throughput of both MAC protocols is higher than I/B WMN. For 30 flows, the throughput of EDCA in case of hybrid WMN is about 1.4 times higher than I/B WMN. For Weibull distribution, in case of I/B WMN, the throughput of both MAC protocols is higher than Hybrid WMN. For 30 flows, the throughput of EDCA in case of I/B WMN is about 2.6 times higher than Hybrid WMN. For exponential distribution, the delay and jitter of Hybrid WMN are lower than I/B WMN. For 20 flows, the delay of EDCA in case of hybrid WMN is about 10 times lower than I/B WMN. For Weibull distribution, the delay and jitter of both architectures are almost the same. However, for 10 flows, the delay of I/B WMN is lower compared with hybrid WMN. For exponential distribution, the fairness index of I/B WMN is a little bit higher than hybrid WMN. For Weibull distribution, the fairness index is almost the same for both WMN architectures.

Lecture Notes on Data Engineering and Communications Technologies, 2016

In this paper, we evaluate the performance of two WMN architectures considering Packet Delivery R... more In this paper, we evaluate the performance of two WMN architectures considering Packet Delivery Ratio (PDR), throughput, delay and energy metrics. For simulations, we used ns-3 and Transmission Control Protocol (TCP). We compare the performance for Hybrid Wireless Mesh Protocol (HWMP) and Optimized Link State Routing (OLSR) for normal and uniform distributions of mesh clients by sending multiple Constant Bit Rate (CBR) flows in the network. The simulation results show that the PDR for both distributions and architectures is almost the same, but the PDR of HWMP is a little bit better than OLSR. the throughput is better for normal distribution and I/B WMN architecture in case of HWMP. However, for OLSR and normal distribution, the throughput of Hybrid WMN is a little bit higher than I/B WMN. For both distributions the delay of both architectures is better for HWMP compared with OLSR. For both WMN architectures and routing protocols for normal and uniform distributions, respectively. For normal distribution, the energy decreases sharply, because of the high density of nodes, thus the nodes spend more energy. So, the uniform distribution has better performance compared with normal distribution considering the energy parameter.

2011 IEEE International Conference on Advanced Information Networking and Applications, 2011

ABSTRACT

2015 18th International Conference on Network-Based Information Systems, 2015

Wireless Mesh Networks (WMNs) are attracting a lot of attention from wireless network researchers... more Wireless Mesh Networks (WMNs) are attracting a lot of attention from wireless network researchers. Node placement problems have been investigated for a long time in the optimization field due to numerous applications in location science. In this work, we evaluated WMN-HC system which is based on Hill Climbing (HC) to find an optimal location assignment for mesh routers. As evaluation metrics, we used throughput, one-way delay, jitter, fairness index and residual energy. For simulations, we used ns-3 and Optimized Link State Routing (OLSR). We compare the performance of the optimized network topologies by sending multiple constant bit rate flows in the network. The simulation results show that the throughput of 24 mesh routers is higher than other number of mesh routers for both WMN architectures. The delay and jitter of 24 mesh routers is lower than other number of mesh routers. The fairness index of 16 mesh routers is higher than other number of mesh routers for Hybrid WMN architecture. For 16 mesh router, the remaining energy is higher than 24 and 32 mesh routers.

International Journal of Web and Grid Services, 2015

In this work, we present WMN-HC and WMN-SA systems which are based on Hill Climbing HC and Simula... more In this work, we present WMN-HC and WMN-SA systems which are based on Hill Climbing HC and Simulated Annealing SA for location assignment of mesh routers in Wireless Mesh Networks WMNs. As evaluation metrics, we used throughput, one-way delay, jitter, fairness index and residual energy. The simulation results show that for WMN-HC, the throughput of 24 mesh routers is good for both WMN architectures. But, for WMN-SA, the throughput is almost the same. For WMN-HC, the delay and jitter of 24 mesh routers is low for both WMN architectures. However, for WMN-SA, the delay and jitter of 32 mesh routers is higher for I/B WMN architecture. For WMN-HC, the fairness index of 16 mesh routers is high for Hybrid WMN architecture. But, for WMN-SA, the fairness index of 32 mesh routers is high for I/B WMN architecture. For 16 and 32 mesh routers, the remaining energy of WMN-HC is higher than WMN-SA.

2015 IEEE 29th International Conference on Advanced Information Networking and Applications, 2015

Wireless Mesh Networks (WMNs) are attracting a lot of attention from wireless network researchers... more Wireless Mesh Networks (WMNs) are attracting a lot of attention from wireless network researchers, because of their potential use in several fields such as collaborative computing and communications. Considering mobility of the terminals, routing is a key process for operation of WMNs. In this paper, we present the implementation of a testbed for WMNs. We analyze the performance of Optimized Link State Routing (OLSR) protocol in an indoor environment considering NLoS scenario. For evaluation we considered throughput, Packet Delivery Ratio (PDR), hop count, delay and jitter metrics. The experimental results show that the nodes in the testbed were communicating smoothly and we got hight values of throughput and PDR and low values of delay and jitter.

2014 Eighth International Conference on Complex, Intelligent and Software Intensive Systems, 2014

In this paper, we evaluate the performance of WMN-GA system for different settings of number of m... more In this paper, we evaluate the performance of WMN-GA system for different settings of number of mesh clients. The population size is considered 64 and the number of generation 400. We considered Uniform and Normal distributions of mesh clients. For evaluation, we consider average size of giant component (Avg. SGC) and average number of covered mesh clients (Avg. NCMC) metrics. The simulation results shows that for both distributions, with the increase of the number of mesh routers, the number of covered mesh clients is increased. With the increase of the number of mesh clients, the percentage of Avg. NCMC is increased. Comparing the simulation results for both Uniform and Normal distributions, for number of mesh routers 16 to 64 the performance of Normal distribution is better compared with Uniform distribution, but for number of mesh routers 128 for both distributions the performance is very good.

Modeling and Optimization in Science and Technologies, 2015

ABSTRACT Peer-to-Peer (P2P) computing systems offer many advantages of decentralized distributed ... more ABSTRACT Peer-to-Peer (P2P) computing systems offer many advantages of decentralized distributed systems but suffer from availability and reliability. In order to increase availability and reliability, data replication techniques are considered commonplace in P2P computing systems. Replication can be seen as a family of techniques. Full documents or just chunks can be replicated. Since the same data can be found at multiple peers, availability is assured in case of peer failure. Consistency is a challenge in replication systems that allow dynamic updates of replicas. Fundamental to any of them is the degree of replication (full vs. partial), as well as the source of the updates and the way updates are propagated in the system. Due to the various characteristics of distributed systems as well as system’s and application’s requirements, a variety of data replication techniques have been proposed in the distributed computing field. One important distributed computing paradigm is that of P2P systems, which distinguish for their large scale and unreliable nature. In this chapter we study some data replication techniques and requirements for different P2P applications. We identify several contexts and use cases where data replication can greatly support collaboration. This chapter will also discuss existing optimistic replication solutions and P2P replication strategies and analyze their advantages and disadvantages. We also propose and evaluate the performance of a fuzzy-based system for finding the best replication factor in a P2P network.

ACM International Conference Proceeding Series, 2011

Wireless Mesh Networks (WMNs) have become an important networking infrastructure for providing co... more Wireless Mesh Networks (WMNs) have become an important networking infrastructure for providing cost-efficient broadband wireless connectivity. In this paper, we propose and implement a system based on Genetic Algorithms (GAs) called WMN-GA. We evaluate the performance of WMN-GA for 0.7 crossover rate and 0.3 mutation rate, Exponential Ranking and different distribution of clients considering number of covered users parameters. The

Proceedings - International Conference on Advanced Information Networking and Applications, AINA, 2011

Node placement problems have been long investi- gated in the optimization field due to numerous a... more Node placement problems have been long investi- gated in the optimization field due to numerous applications in facility location, logistics, services, etc. Such problems are attracting again the attention of researchers now from the networking domain, and more especially from Wireless Mesh Networks (WMNs) field. Indeed, the placement of mesh routers nodes appears to be crucial for the performance and

Es permet l'ús personal d'aquest material. S'ha de demanar permís a l'IEEE per a qualsevol altre ... more Es permet l'ús personal d'aquest material. S'ha de demanar permís a l'IEEE per a qualsevol altre ús, incloent la reimpressió/reedició amb fins publicitaris o promocionals, la creació de noves obres col•lectives per a la revenda o redistribució en servidors o llistes o la reutilització de parts d'aquest treball amb drets d'autor en altres treballs.

2014 Ninth International Conference on Broadband and Wireless Computing, Communication and Applications, 2014

In our previous work, we presented WMN-GA (Wireless Mesh Networks-Genetic Algorithm) system. In t... more In our previous work, we presented WMN-GA (Wireless Mesh Networks-Genetic Algorithm) system. In this paper, we use WMN-GA and analyze the simulation results considering packet delivery ratio (PDR), throughput and delay metrics. For simulations, we used ns-3 simulator and Hybrid Wireless Mesh Protocol (HWMP). We evaluate the performance of WMN for Exponential and Weibull distributions by sending multiple constant bit rate (CBR) flows and different transmission rates in the network. From simulation results, we found that for 10, 20 and 30 number of connections, the PDR is less than 60% when the transmission rate is more than 1200 kbps for Exponential distribution. The PDR for Weibull distribution is higher than Exponential distribution. For different number of connections, the throughput is increased linearly with the increasing of the transmission rate. The throughput of Exponential distribution is higher than Weibull distribution. With increasing of the number of the connections and the transmission rate, the delay is increased. For 10 connections, the delay is very small until the transmission rate is 800 kbps. The delay of Exponential distribution is smaller than that of Weibull distribution.

Advances in Internet, Data and Web Technologies, 2020

The Wireless Mesh Networks (WMNs) are becoming an important networking infrastructure because the... more The Wireless Mesh Networks (WMNs) are becoming an important networking infrastructure because they have many advantages such as low cost and increased high speed wireless Internet connectivity. In our previous work, we implemented a Particle Swarm Optimization (PSO) and Hill Climbing (HC) based hybrid simulation system, called WMN-PSOHC, and a simulation system based on Genetic Algorithm (GA), called WMN-GA. Then, we implemented a hybrid simulation system based on PSOHC and distributed GA (DGA), called WMN-PSOHC-DGA. In this paper, we analyze the performance of WMNs using WMN-PSOHC-DGA simulation system considering the number of evolution steps and computation time. Simulation results show that the 8 evolution steps were enough and computation time was linearly increased with increasing of the evolution steps.

Lecture Notes in Networks and Systems, 2020

Wireless Mesh Networks (WMNs) are becoming an important networking infrastructure because they ha... more Wireless Mesh Networks (WMNs) are becoming an important networking infrastructure because they have many advantages such as low cost and increased high-speed wireless Internet connectivity. In our previous work, we implemented a Particle Swarm Optimization (PSO) based simulation system (called WMN-PSO), and a simulation system based on Genetic Algorithm (GA) (called WMN-GA), for solving node placement problem in WMNs. Then, we implemented a hybrid simulation system based on PSO and distributed GA (DGA) (called WMN-PSODGA). Moreover, we added in the fitness function a new parameter for the load balancing of the mesh routers called NCMCpR (Number of Covered Mesh Clients per Router). In this paper, we compare the simulation results using uniform and exponential distributions for 16 and 32 mesh routers. The simulation results showed that the proper number of the routers for uniform distribution is 32 and for exponential distribution is 16. Especially, uniform distribution optimized by 3...

Lecture Notes in Networks and Systems, 2021

Journal of High Speed Networks, 2021

Wireless Mesh Networks (WMNs) are gaining a lot of attention from researchers due to their advant... more Wireless Mesh Networks (WMNs) are gaining a lot of attention from researchers due to their advantages such as easy maintenance, low upfront cost and high robustness. Connectivity and stability directly affect the performance of WMNs. However, WMNs have some problems such as node placement problem, hidden terminal problem and so on. In our previous work, we implemented a simulation system to solve the node placement problem in WMNs considering Particle Swarm Optimization (PSO) and Distributed Genetic Algorithm (DGA), called WMN-PSODGA. In this paper, we compare chi-square and uniform distributions of mesh clients for different router replacement methods. The router replacement methods considered are Constriction Method (CM), Random Inertia Weight Method (RIWM), Linearly Decreasing Inertia Weight Method (LDIWM), Linearly Decreasing Vmax Method (LDVM) and Rational Decrement of Vmax Method (RDVM). The simulation results show that for chi-square distribution the mesh routers cover all me...

Journal of Ambient Intelligence and Humanized Computing, 2017

In this paper, we evaluate the performance of two WMN architectures (infrastructure/backbone WMNs... more In this paper, we evaluate the performance of two WMN architectures (infrastructure/backbone WMNs (I/B WMNs) and Hybrid WMN architectures) considering throughput, delay, jitter and fairness index metrics. For simulations, we used ns-3 and optimized link state routing. We compare the performance of distributed coordination function and enhanced distributed channel access (EDCA) for exponential and Weibull distributions of mesh clients by sending multiple constant bit rate flows in the network. The simulation results show that for exponential distribution, in case of Hybrid WMN, the throughput of both MAC protocols is higher than I/B WMN. For 30 flows, the throughput of EDCA in case of hybrid WMN is about 1.4 times higher than I/B WMN. For Weibull distribution, in case of I/B WMN, the throughput of both MAC protocols is higher than Hybrid WMN. For 30 flows, the throughput of EDCA in case of I/B WMN is about 2.6 times higher than Hybrid WMN. For exponential distribution, the delay and jitter of Hybrid WMN are lower than I/B WMN. For 20 flows, the delay of EDCA in case of hybrid WMN is about 10 times lower than I/B WMN. For Weibull distribution, the delay and jitter of both architectures are almost the same. However, for 10 flows, the delay of I/B WMN is lower compared with hybrid WMN. For exponential distribution, the fairness index of I/B WMN is a little bit higher than hybrid WMN. For Weibull distribution, the fairness index is almost the same for both WMN architectures.

Lecture Notes on Data Engineering and Communications Technologies, 2016

In this paper, we evaluate the performance of two WMN architectures considering Packet Delivery R... more In this paper, we evaluate the performance of two WMN architectures considering Packet Delivery Ratio (PDR), throughput, delay and energy metrics. For simulations, we used ns-3 and Transmission Control Protocol (TCP). We compare the performance for Hybrid Wireless Mesh Protocol (HWMP) and Optimized Link State Routing (OLSR) for normal and uniform distributions of mesh clients by sending multiple Constant Bit Rate (CBR) flows in the network. The simulation results show that the PDR for both distributions and architectures is almost the same, but the PDR of HWMP is a little bit better than OLSR. the throughput is better for normal distribution and I/B WMN architecture in case of HWMP. However, for OLSR and normal distribution, the throughput of Hybrid WMN is a little bit higher than I/B WMN. For both distributions the delay of both architectures is better for HWMP compared with OLSR. For both WMN architectures and routing protocols for normal and uniform distributions, respectively. For normal distribution, the energy decreases sharply, because of the high density of nodes, thus the nodes spend more energy. So, the uniform distribution has better performance compared with normal distribution considering the energy parameter.

2011 IEEE International Conference on Advanced Information Networking and Applications, 2011

ABSTRACT

2015 18th International Conference on Network-Based Information Systems, 2015

Wireless Mesh Networks (WMNs) are attracting a lot of attention from wireless network researchers... more Wireless Mesh Networks (WMNs) are attracting a lot of attention from wireless network researchers. Node placement problems have been investigated for a long time in the optimization field due to numerous applications in location science. In this work, we evaluated WMN-HC system which is based on Hill Climbing (HC) to find an optimal location assignment for mesh routers. As evaluation metrics, we used throughput, one-way delay, jitter, fairness index and residual energy. For simulations, we used ns-3 and Optimized Link State Routing (OLSR). We compare the performance of the optimized network topologies by sending multiple constant bit rate flows in the network. The simulation results show that the throughput of 24 mesh routers is higher than other number of mesh routers for both WMN architectures. The delay and jitter of 24 mesh routers is lower than other number of mesh routers. The fairness index of 16 mesh routers is higher than other number of mesh routers for Hybrid WMN architecture. For 16 mesh router, the remaining energy is higher than 24 and 32 mesh routers.

International Journal of Web and Grid Services, 2015

In this work, we present WMN-HC and WMN-SA systems which are based on Hill Climbing HC and Simula... more In this work, we present WMN-HC and WMN-SA systems which are based on Hill Climbing HC and Simulated Annealing SA for location assignment of mesh routers in Wireless Mesh Networks WMNs. As evaluation metrics, we used throughput, one-way delay, jitter, fairness index and residual energy. The simulation results show that for WMN-HC, the throughput of 24 mesh routers is good for both WMN architectures. But, for WMN-SA, the throughput is almost the same. For WMN-HC, the delay and jitter of 24 mesh routers is low for both WMN architectures. However, for WMN-SA, the delay and jitter of 32 mesh routers is higher for I/B WMN architecture. For WMN-HC, the fairness index of 16 mesh routers is high for Hybrid WMN architecture. But, for WMN-SA, the fairness index of 32 mesh routers is high for I/B WMN architecture. For 16 and 32 mesh routers, the remaining energy of WMN-HC is higher than WMN-SA.

2015 IEEE 29th International Conference on Advanced Information Networking and Applications, 2015

Wireless Mesh Networks (WMNs) are attracting a lot of attention from wireless network researchers... more Wireless Mesh Networks (WMNs) are attracting a lot of attention from wireless network researchers, because of their potential use in several fields such as collaborative computing and communications. Considering mobility of the terminals, routing is a key process for operation of WMNs. In this paper, we present the implementation of a testbed for WMNs. We analyze the performance of Optimized Link State Routing (OLSR) protocol in an indoor environment considering NLoS scenario. For evaluation we considered throughput, Packet Delivery Ratio (PDR), hop count, delay and jitter metrics. The experimental results show that the nodes in the testbed were communicating smoothly and we got hight values of throughput and PDR and low values of delay and jitter.

2014 Eighth International Conference on Complex, Intelligent and Software Intensive Systems, 2014

In this paper, we evaluate the performance of WMN-GA system for different settings of number of m... more In this paper, we evaluate the performance of WMN-GA system for different settings of number of mesh clients. The population size is considered 64 and the number of generation 400. We considered Uniform and Normal distributions of mesh clients. For evaluation, we consider average size of giant component (Avg. SGC) and average number of covered mesh clients (Avg. NCMC) metrics. The simulation results shows that for both distributions, with the increase of the number of mesh routers, the number of covered mesh clients is increased. With the increase of the number of mesh clients, the percentage of Avg. NCMC is increased. Comparing the simulation results for both Uniform and Normal distributions, for number of mesh routers 16 to 64 the performance of Normal distribution is better compared with Uniform distribution, but for number of mesh routers 128 for both distributions the performance is very good.

Modeling and Optimization in Science and Technologies, 2015

ABSTRACT Peer-to-Peer (P2P) computing systems offer many advantages of decentralized distributed ... more ABSTRACT Peer-to-Peer (P2P) computing systems offer many advantages of decentralized distributed systems but suffer from availability and reliability. In order to increase availability and reliability, data replication techniques are considered commonplace in P2P computing systems. Replication can be seen as a family of techniques. Full documents or just chunks can be replicated. Since the same data can be found at multiple peers, availability is assured in case of peer failure. Consistency is a challenge in replication systems that allow dynamic updates of replicas. Fundamental to any of them is the degree of replication (full vs. partial), as well as the source of the updates and the way updates are propagated in the system. Due to the various characteristics of distributed systems as well as system’s and application’s requirements, a variety of data replication techniques have been proposed in the distributed computing field. One important distributed computing paradigm is that of P2P systems, which distinguish for their large scale and unreliable nature. In this chapter we study some data replication techniques and requirements for different P2P applications. We identify several contexts and use cases where data replication can greatly support collaboration. This chapter will also discuss existing optimistic replication solutions and P2P replication strategies and analyze their advantages and disadvantages. We also propose and evaluate the performance of a fuzzy-based system for finding the best replication factor in a P2P network.

ACM International Conference Proceeding Series, 2011

Wireless Mesh Networks (WMNs) have become an important networking infrastructure for providing co... more Wireless Mesh Networks (WMNs) have become an important networking infrastructure for providing cost-efficient broadband wireless connectivity. In this paper, we propose and implement a system based on Genetic Algorithms (GAs) called WMN-GA. We evaluate the performance of WMN-GA for 0.7 crossover rate and 0.3 mutation rate, Exponential Ranking and different distribution of clients considering number of covered users parameters. The

Proceedings - International Conference on Advanced Information Networking and Applications, AINA, 2011

Node placement problems have been long investi- gated in the optimization field due to numerous a... more Node placement problems have been long investi- gated in the optimization field due to numerous applications in facility location, logistics, services, etc. Such problems are attracting again the attention of researchers now from the networking domain, and more especially from Wireless Mesh Networks (WMNs) field. Indeed, the placement of mesh routers nodes appears to be crucial for the performance and