Fuzzy QoS Based OLSR Network

2011 ◽  
Vol 3 (1) ◽  
pp. 50-55
Author(s):  
G. Uma Maheswari
Keyword(s):  
Ad Hoc ◽  
Mobile Wireless Networks ◽  
Mobile Wireless ◽  
Fuzzy Logic Algorithm ◽  
Link State ◽  
Hoc Networks ◽  
Path Computations ◽  
Optimized Link State Routing ◽  
Selection Of

Quality-of-Service (QoS) routing protocol is developed for mobile Ad Hoc Networks. MANET is a self configuring network of mobile devices connected by wireless links. Each device in the MANET is free to move independently in any direction; therefore, it changes links to other devices frequently. The proposed QoS-based routing in the Optimized Link State Routing (OLSR) protocol relates bandwidth and delay using a fuzzy logic algorithm. The path computations are examined and the reason behind the selection of bandwidth and delay metrics is discussed. The performance of the protocol is investigated by simulation. The results in FQOLSR indicate an improvement in mobile wireless networks compared with the existing QOLSR system.

Fuzzy QoS Based OLSR Network

2013 ◽  
pp. 50-55
Author(s):  
G. Uma Maheswari
Keyword(s):  
Mobile Ad Hoc Networks ◽  
Ad Hoc ◽  
Mobile Wireless Networks ◽  
Mobile Wireless ◽  
Fuzzy Logic Algorithm ◽  
Link State ◽  
Hoc Networks ◽  
Path Computations ◽  
Optimized Link State Routing

Quality-of-Service (QoS) routing protocol is developed for mobile Ad Hoc Networks. MANET is a self configuring network of mobile devices connected by wireless links. Each device in the MANET is free to move independently in any direction; therefore, it changes links to other devices frequently. The proposed QoS-based routing in the Optimized Link State Routing (OLSR) protocol relates bandwidth and delay using a fuzzy logic algorithm. The path computations are examined and the reason behind the selection of bandwidth and delay metrics is discussed. The performance of the protocol is investigated by simulation. The results in FQOLSR indicate an improvement in mobile wireless networks compared with the existing QOLSR system.

scholarly journals Improving the selection of MPRs in OLSR protocol: a survey of methods and techniques

2020 ◽  
Vol 10 (1) ◽  
pp. 288
Author(s):  
Omar Barki ◽  
Zouhair Guennoun ◽  
Adnane Addaim
Keyword(s):  
Routing Protocol ◽  
Ad Hoc Network ◽  
Ad Hoc ◽  
Mobile Ad Hoc Network ◽  
Link State ◽  
Execution Environment ◽  
Mobile Ad Hoc ◽  
Optimized Link State Routing ◽  
Selection Of

Multi Point Relays (MPRs) are those nodes that are calculated and determined by the Optimized Link State Routing protocol (OLSR) in order to minimize and avoid overload inside the Mobile Ad hoc Network (MANET). In this paper, we will present a synthetic study of many techniques and methods for calculating and selecting the MPR nodes using a set of criteria namely energy, mobility, bandwidth, the quality of links, etc. The result of this study shows that most techniques consider a limited number of metrics for selecting the MPR nodes and therefore they are insufficient to allow the OLSR protocol to be quite complete and efficient because several metrics can occur at the same time in the real execution environment.

Routing and Coding Enhancements to Improve QoS of Video Transmissions in Future Ad Hoc Networks

2012 ◽  
pp. 244-261
Author(s):  
Juan C. Guerri ◽  
Pau Arce ◽  
Patricia Acelas ◽  
Wilder E. Castellanos ◽  
Francisco Fraile
Keyword(s):  
Ad Hoc Networks ◽  
Wireless Mesh Networks ◽  
Ad Hoc ◽  
Mesh Networks ◽  
Hierarchical Routing ◽  
Link State ◽  
Wireless Mesh ◽  
Hoc Networks ◽  
Optimized Link State Routing

Video services are much demanded nowadays but bandwidth and delay requirements of this kind of services are very restrictive. Offering real-time video services in wireless ad-hoc networks is not an easy task because of the difficulty of guaranteeing certain quality in a shared medium. Practical solutions should try to improve communications at (and gathering information from) several layers of the protocol stack. Mobile Ad-hoc Networks are infrastructure-less wireless networks characterized by being very versatile, dynamic and self-organized but also by the difficulty to achieve a good Quality of Service in video transmissions due to packet losses and node mobility. On the other hand, the Wireless Mesh Network is presented as the next step in wireless networks. Wireless Mesh Networks have a hierarchical topology, clustered structure and static backbone, which all help to improve the network stability. In the way towards Wireless Mesh Networks, hierarchical routing protocols could transform an ad-hoc network in a more robust wireless network. Therefore, in this chapter, hierarchical routing protocols have been studied, particularly Hierarchical Optimized Link State Routing Protocol, and compared with a traditional flat routing protocol named Optimized Link State Routing. Furthermore, additional video coding techniques have been used in order to improve video quality in reception. At application layer, results show that Multi-description Coding achieves better quality on video transmissions when nodes have medium or high mobility, especially when using multipoint-to-point transmission or disjoint paths in a hierarchical structure. Video trace simulations have allowed us to perform subjective quality tests to assert the Quality of Experience improvements in video transmissions.

scholarly journals An Enhanced MPR-Based Solution for Flooding of Broadcast Messages in OLSR Wireless ad hoc Networks

2010 ◽  
Vol 6 (3) ◽  
pp. 249-257 ◽  
Author(s):  
Tzu-Hua Lin ◽  
Han-Chieh Chao ◽  
Isaac Woungang
Keyword(s):  
Wireless Ad Hoc Networks ◽  
Packet Loss ◽  
Ad Hoc ◽  
Promising Technique ◽  
Simulation Experiments ◽  
Mobile Wireless ◽  
Link State ◽  
Performance Metric ◽  
Hoc Networks ◽  
Optimized Link State Routing

In an Optimized Link State Routing (OLSR)-based mobile wireless network, optimizing the flooding of broadcast messages is a challenging task due to node's mobility and bandwidth resource consumption. To complement existing solutions to this problem, the Multi-Point Relays (MPR) selection has recently been advocated as a promising technique that has an additional feature of reducing the number of redundant re-transmission occurring in the network. This paper continuous on the investigation of an existing MPR-based solution, arguing that by considering a cost factor as an additional decision parameter in selecting the MPR nodes, the enhanced MPR selection algorithm leads to less packet loss in the network. Simulation experiments are presented to validate the stated goal, using the average packet loss ratio as the performance metric.

scholarly journals Performance Enhancement of Optimized Link State Routing Protocol by Parameter Configuration for UANET

Drones ◽  
2022 ◽  
Vol 6 (1) ◽  
pp. 22
Author(s):  
Esmot Ara Tuli ◽  
Mohtasin Golam ◽  
Dong-Seong Kim ◽  
Jae-Min Lee
Keyword(s):  
Routing Protocol ◽  
Ad Hoc ◽  
Performance Enhancement ◽  
Geographic Routing ◽  
Simulation Software ◽  
Link State ◽  
Parameter Configuration ◽  
Hoc Networks ◽  
Dynamic Attributes ◽  
Optimized Link State Routing

The growing need for wireless communication has resulted in the widespread usage of unmanned aerial vehicles (UAVs) in a variety of applications. Designing a routing protocol for UAVs is paramount as well as challenging due to its dynamic attributes. The difficulty stems from features other than mobile ad hoc networks (MANET), such as aerial mobility in 3D space and frequently changing topology. This paper analyzes the performance of four topology-based routing protocols, dynamic source routing (DSR), ad hoc on-demand distance vector (AODV), geographic routing protocol (GRP), and optimized link state routing (OLSR), by using practical simulation software OPNET 14.5. Performance evaluation carries out various metrics such as throughput, delay, and data drop rate. Moreover, the performance of the OLSR routing protocol is enhanced and named “E-OLSR” by tuning parameters and reducing holding time. The optimized E-OLSR settings provide better performance than the conventional request for comments (RFC 3626) in the experiment, making it suitable for use in UAV ad hoc network (UANET) environments. Simulation results indicate the proposed E-OLSR outperforms the existing OLSR and achieves supremacy over other protocols mentioned in this paper.

scholarly journals Predicting Topology Propagation Messages in Mobile Ad Hoc Networks: The Value of History

Sensors ◽  
2019 ◽  
Vol 20 (1) ◽  
pp. 24
Author(s):  
Pere Millán ◽  
Carles Aliagas ◽  
Carlos Molina ◽  
Roc Meseguer ◽  
Sergio F. Ochoa ◽  
...  
Keyword(s):  
Ad Hoc ◽  
Low Cost ◽  
High Mobility ◽  
Message Routing ◽  
Link State ◽  
Previous Proposal ◽  
Mobile Ad Hoc ◽  
Hoc Networks ◽  
Optimized Link State Routing ◽  
Prediction Strategy

The mobile ad hoc communication in highly dynamic scenarios, like urban evacuations or search-and-rescue processes, plays a key role in coordinating the activities performed by the participants. Particularly, counting on message routing enhances the communication capability among these actors. Given the high dynamism of these networks and their low bandwidth, having mechanisms to predict the network topology offers several potential advantages; e.g., to reduce the number of topology propagation messages delivered through the network, the consumption of resources in the nodes and the amount of redundant retransmissions. Most strategies reported in the literature to perform these predictions are limited to support high mobility, consume a large amount of resources or require training. In order to contribute towards addressing that challenge, this paper presents a history-based predictor (HBP), which is a prediction strategy based on the assumption that some topological changes in these networks have happened before in the past, therefore, the predictor can take advantage of these patterns following a simple and low-cost approach. The article extends a previous proposal of the authors and evaluates its impact in highly mobile scenarios through the implementation of a real predictor for the optimized link state routing (OLSR) protocol. The use of this predictor, named OLSR-HBP, shows a reduction of 40–55% of topology propagation messages compared to the regular OLSR protocol. Moreover, the use of this predictor has a low cost in terms of CPU and memory consumption, and it can also be used with other routing protocols.

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