Wireless mesh networks

2008 ◽  
Vol 14 (8) ◽  
pp. 401-403 ◽  
Author(s):  
Xinheng Wang
Keyword(s):  
Wireless Networks ◽  
Large Scale ◽  
Ad Hoc ◽  
Mesh Networks ◽  
Low Cost ◽  
Mesh Network ◽  
Self Healing ◽  
Large Area ◽  
Satellite Systems ◽  
Wireless Mesh

Wireless telemedicine using GSM and GPRS technologies can only provide low bandwidth connections, which makes it difficult to transmit images and video. Satellite or 3G wireless transmission provides greater bandwidth, but the running costs are high. Wireless networks (WLANs) appear promising, since they can supply high bandwidth at low cost. However, the WLAN technology has limitations, such as coverage. A new wireless networking technology named the wireless mesh network (WMN) overcomes some of the limitations of the WLAN. A WMN combines the characteristics of both a WLAN and ad hoc networks, thus forming an intelligent, large scale and broadband wireless network. These features are attractive for telemedicine and telecare because of the ability to provide data, voice and video communications over a large area. One successful wireless telemedicine project which uses wireless mesh technology is the Emergency Room Link (ER-LINK) in Tucson, Arizona, USA. There are three key characteristics of a WMN: self-organization, including self-management and self-healing; dynamic changes in network topology; and scalability. What we may now see is a shift from mobile communication and satellite systems for wireless telemedicine to the use of wireless networks based on mesh technology, since the latter are very attractive in terms of cost, reliability and speed.

scholarly journals Integrated routing system for wireless mesh networks

2021 ◽  
Author(s):  
Amir Esmailpour
Keyword(s):  
Network Performance ◽  
Ad Hoc ◽  
Mesh Networks ◽  
Low Cost ◽  
Access Network ◽  
Mesh Network ◽  
Mobile Nodes ◽  
Backbone Network ◽  
Wireless Mesh ◽  
Alternative Path

Recently Wireless Mesh Network (WMN) has become popular especially for its low cost deployment in the areas of poor network infrastructure and terrain of difficult deployment. Although paths in WMN backbone network are stable, the access link contention can severely constrain the end-to-end throughput. We proposed an integrated routing system for WMN that exploits both paths through the backbone network and through the ad-hoc access network of mobile nodes. The ad-hoc path is considered as an alternative path and is used only when the primary backbone path is severely constrained due to access links contention. We have shown through simulation that alternative path is effective in delivering higher throughput in that situation. We also proposed a scheme for initiating the route discovery of the ad-hoc path. The main contributions of this thesis are two algorithms that allow the mobile node to evaluate the throughput of the backbone and ad-hoc paths, and to make a decision of taking one path. The proposed algorithms are implemented in OPNET simulator, and network performance is studied under variety of conditions.

scholarly journals Integrated routing system for wireless mesh networks

2021 ◽  
Author(s):  
Amir Esmailpour
Keyword(s):  
Network Performance ◽  
Ad Hoc ◽  
Mesh Networks ◽  
Low Cost ◽  
Access Network ◽  
Mesh Network ◽  
Mobile Nodes ◽  
Backbone Network ◽  
Wireless Mesh ◽  
Alternative Path

Recently Wireless Mesh Network (WMN) has become popular especially for its low cost deployment in the areas of poor network infrastructure and terrain of difficult deployment. Although paths in WMN backbone network are stable, the access link contention can severely constrain the end-to-end throughput. We proposed an integrated routing system for WMN that exploits both paths through the backbone network and through the ad-hoc access network of mobile nodes. The ad-hoc path is considered as an alternative path and is used only when the primary backbone path is severely constrained due to access links contention. We have shown through simulation that alternative path is effective in delivering higher throughput in that situation. We also proposed a scheme for initiating the route discovery of the ad-hoc path. The main contributions of this thesis are two algorithms that allow the mobile node to evaluate the throughput of the backbone and ad-hoc paths, and to make a decision of taking one path. The proposed algorithms are implemented in OPNET simulator, and network performance is studied under variety of conditions.

scholarly journals XCP-Winf and RCP-Winf: Improving Explicit Wireless Congestion Control

2015 ◽  
Vol 2015 ◽  
pp. 1-18 ◽  
Author(s):  
Luís Barreto
Keyword(s):  
Wireless Networks ◽  
Congestion Control ◽  
Ad Hoc ◽  
Mesh Networks ◽  
Control Mechanisms ◽  
Available Bandwidth ◽  
Wireless Links ◽  
Wireless Mesh ◽  
Network Interaction ◽  
Hoc Networks

Congestion control in wireless networks is strongly dependent on the dynamics and instability of wireless links. Therefore, it is very difficult to accurately evaluate the characteristics of the wireless links. It is known that TCP experiences serious performance degradation problems in wireless networks. Moreover, congestion control mechanisms that rely on network interaction and network parameters, such as XCP and RCP, do not evaluate accurately the capacity and available link bandwidth in wireless networks. In this paper we propose new explicit flow control protocols for wireless mesh networks, based on XCP and RCP. We name these protocols XCP-Winf and RCP-Winf. They rely on the MAC layer information gathered by a new method to accurately estimate the available bandwidth and the path capacity over a wireless network path. The estimation is performed in real time and without the need to intrusively inject packets in the network. These new congestion control mechanisms are evaluated in different scenarios in wireless mesh and ad hoc networks and compared against several new approaches for wireless congestion control. It is shown that both XCP-Winf and RCP-Winf outperform the evaluated approaches, showing its stable behavior and better channel utilization.

Wireless mesh network data communications and reliability analysis for anti-theft application deployment in educational institutions

2019 ◽  
Vol 17 (3) ◽  
pp. 474-489
Author(s):  
Roger van Rensburg ◽  
Bruce Mellado ◽  
Cesar Augusto Marin Tobon
Keyword(s):  
South Africa ◽  
Mesh Networks ◽  
Low Cost ◽  
Mesh Network ◽  
Educational Institutions ◽  
Data Communications ◽  
Wireless Technology ◽  
Content Type ◽  
Wireless Mesh

Purpose The purpose of this study is to locally develop low-cost wireless mesh networks for reliable data communications to devices that prevent the theft of these devices in learning institutions of South Africa. Design/methodology/approach A network test-bench was developed where millions of packets were transmitted and logged between interconnected nodes to analyze the quality of the network’s service in a harsh indoor building environment. Similar methodologies in “big data” analysis as found in particle physics were adopted to analyze the network’s performance and reliability. Findings The results from statistical analysis reveal the quality of service between multiple asynchronous transmitting nodes in the network and compared with the wireless technology routing protocol to assess coverage in large geographical areas. The mesh network provides stable data communications between nodes with the exception of reliability degradation in some multi-hopping routes. Conclusions are presented to determine whether the underlining mesh network technology will be deployed to protect devices against theft in educational institutions of South Africa. Research limitations/implications The anti-theft application will focus on proprietary firmware development with a reputable tablet manufacturer to render the device inoperable. Data communications of devices to the network will be monitored and controlled from a central management system. The electronics embedding the system-on-chip will be redesigned and developed using the guidelines stipulated by the chip manufacturer. Originality/value Design and development of low-cost wireless mesh networks to protect tablets against theft in institutions of digitized learning. The work presents performance and reliability metrics of a low-power wireless mesh wireless technology developed in a harsh indoor building environment.

Optimization of WMN Performance for Different Propagation Environment

2018 ◽  
Vol 8 (4) ◽  
pp. 76
Author(s):  
Reshi Isfaq Qadir ◽  
Anuradha Saini
Keyword(s):  
Cost Function ◽  
Wireless Mesh Network ◽  
Ad Hoc ◽  
Mesh Networks ◽  
Link Quality ◽  
Mesh Network ◽  
Flexible System ◽  
Wireless Mesh ◽  
Hoc Networks ◽  
Point To Point

Wireless mesh networks are multihop systems in which contrivances avail each other in transmitting packets through the network, especially in arduous conditions. We can drop these ad hoc networks into place with minimal preparation, and they provide a reliable, flexible system that can be elongated to thousands of contrivances. The wireless mesh network topology developed is a point-to-point-to-point, or peer-to-peer, system called an ad hoc, multi-hop network. A node can send and receive messages, and in a mesh network, a node withal functions as a router and can relay messages to its neighbours. A mesh network offers multiple redundant communications paths throughout the network. If one link fails for any reason, the network automatically routes messages through alternate paths. In a mesh network, we can abbreviate the distance between nodes, which dramatically increases the link quality. If we reduce the distance by a factor of two, the resulting signal is at least four times more puissant at the receiver. This makes links more reliable without incrementing transmitter power in individual nodes. In a mesh network, we can elongate the reach, integrate redundancy, and amend the general reliability of the network simply by integrating more nodes. One of the most astronomically immense issues in routing is to providing copacetic performance while scaling the wireless mesh network. It is fascinating, however, to investigate what transpires when routing nodes are expanded in different propagation environment and how that affects routing metrics. In this thesis, we examine the utilization of different proactive, reactive and hybrid protocols in such a way so that we may be able to build a cost function which avails in culling the finest grouping of routing protocols for a particular urban wireless mesh network. The key parameters are network throughput and average end to culminate delay. The performance of Bellman ford, DYMO, STAR and ZRP protocols have been examined with different node densities.  A non-linear cost function equation has been proposed corresponding to each routing parameter taken. Bitrate is taken as constant (CBR).

scholarly journals Analisis Routing Protokol Optimized Link State Routing (OLSR) Pada Raspberry Pi

AITI ◽  
2020 ◽  
Vol 16 (2) ◽  
pp. 151-164
Author(s):  
Ulfa Septilia Permatasari ◽  
Indrastanti Ratna Widiasari
Keyword(s):  
Routing Protocol ◽  
Wireless Mesh Network ◽  
Mobile Ad Hoc Network ◽  
Mesh Networks ◽  
Mesh Network ◽  
Raspberry Pi ◽  
Self Healing ◽  
Link State ◽  
Wireless Mesh ◽  
Optimized Link State Routing

Optimized Link State Routing (OLSR)is one of the two standard for mesh networks. OLSR is a link state routing protocol, which use hallo message and topology control (TC) to determine the link state information across the mobile ad-hoc network. OLSR is widely used in the wireless mesh network. Raspberry Pi is a mini computer which can be used as a node router to replace the function of a router in a wireless mesh network. In this research, Raspberry Pi is used as a router nodes to determine the performance of routing protocol OLSR. The parameters used to measure its performance is self-configure time, self-healing and bandwidth usage. The test results showed that the use of routing protocols OLSR on the Raspberry Pi in a wireless mesh network proved able to repair itself if there is a problem on the network since it has ability to self-configure and self-healing.

scholarly journals Mobile ad hoc network integrated wireless networks: a survey

2018 ◽  
Vol 7 (1.9) ◽  
pp. 217
Author(s):  
Dr S.SivaNageswara Rao ◽  
Orchu Aruna ◽  
Dr K.Lakshminadh
Keyword(s):  
Wireless Networks ◽  
Ad Hoc Networks ◽  
Ad Hoc Network ◽  
Ad Hoc ◽  
Mobile Ad Hoc Network ◽  
New Technologies ◽  
Mesh Networks ◽  
Wireless Mesh ◽  
Mobile Ad Hoc ◽  
Hoc Networks

Now a day, every one using mobile devices for communicating with others. The development of new technologies, like Internet of Things (IoT) needs coverage, connectivity, scalability and QoS. In ubiquity networks, the major issues are coverage, connectivity, scalability and QoS. To solve these limitations, integrating wireless networks with ad hoc networks. This paper provides detail survey on how ad hoc networks are integrated with Cellular Network, Wireless Mesh Networks and Wireless Sensor Networks. This integration may resolve the problems of coverage, connectivity, scalability and QoS.

scholarly journals Power enhancement based link quality for wireless mesh network

2021 ◽  
Vol 11 (2) ◽  
pp. 1388
Author(s):  
Mohammad Khalaf Rahim Al-juaifari ◽  
Hussain Mumtaiz Alshamy ◽  
Noor Hassan Abed Khammas
Keyword(s):  
Wireless Mesh Networks ◽  
Network Performance ◽  
Mesh Networks ◽  
Life Time ◽  
Link Quality ◽  
Mesh Network ◽  
Self Healing ◽  
Mobile Nodes ◽  
Long Distance ◽  
Wireless Mesh

Energy consumption of wireless network communication is still a big issue and a lot of research papers have proposed many solutions to increase node life time. The WMN architecture is made up of a fixed and mobile component, whereas the wireless mesh networks (WMNs) are multi-hop wireless networks with instant deployment, self-healing, self-organization and self-configuration features. The reduction in the distance by a factor of two can result in at least four times more powerful signals at the receiver. This paper presents suggestions that the links are more reliable without the increase in power of the transmitter in individual nodes. As a result, the present simulations networks are nine mobile nodes for considering coverage issues of the service area. The analytic results show that the link power node for direct communication between two nodes with long distance consuming more power than it is cleared. The improvement in the network performance for maintaining is available and this solution can be used to implement mobility in such case with low power region for the wireless mesh networks.

scholarly journals Routing in Wireless Mesh Network: A New Metaheuristic Based Routing Approach

2021 ◽  
Vol 23 (08) ◽  
pp. 711-719
Author(s):  
Bhanu Sharma ◽  
◽  
Amar Singh ◽  
Keyword(s):  
Optimization Algorithm ◽  
Wireless Mesh Network ◽  
Ad Hoc ◽  
Mesh Networks ◽  
Routing Algorithm ◽  
Mesh Network ◽  
Dynamic Nature ◽  
Wireless Mesh ◽  
Dynamic Source ◽  
Distance Vector

Routing is a challenging issue of WMNs due to the dynamic nature of the network. In WMNs, a node can leave or join the network at any time. So, there is a need for an efficient routing algorithm in WMNs that should quickly discover the path. The development of different networking environments has a significant effect on WMNs routing. This paper proposes a new Butterfly Optimization algorithm (BOA) based routing approach for Wireless Mesh Networks. The proposed BOA routing approach was implemented using MATLAB, and its performance was compared with Ad Hoc On-Demand Distance Vector(AODV), Ant Colony Optimization(ACO), BAT optimization algorithm, Dynamic Source Routing(DSR), and Biogeography-based optimization(BBO)based routing approaches on 500, 1000, 1500, and 2000 dynamic node scenarios. From the results, We observe that the proposed Butterfly based routing approach outperforms the existing five routing approaches.

Classification of Channel Allocation Schemes in Wireless Mesh Network

2019 ◽  
pp. 65-92
Author(s):  
Abira Banik ◽  
Abhishek Majumder
Keyword(s):  
Channel Assignment ◽  
Wireless Mesh Network ◽  
Ad Hoc ◽  
Channel Allocation ◽  
Low Cost ◽  
Mesh Network ◽  
Available Bandwidth ◽  
Factors Affecting ◽  
Mesh Topology ◽  
Wireless Mesh

Wireless mesh network (WMN) is a widely accepted network topology due to its implementation convenience, low cost nature, and immense adaptability in real-time scenarios. The components of the network are gateways, mesh routers, access points, and end users. The components in mesh topology have a dedicated line of communication with a half-duplex radio. The wireless mesh network is basically implemented in IEEE 802.11 standard, and it is typically ad-hoc in nature. The advantageous nature of WMN leads to its extensive use in today's world. WMN's overall performance has been increased by incorporating the concept of multi-channel multi-radio. This gives rise to the problem of channel assignment for maximum utilization of the available bandwidth. In this chapter, the factors affecting the channel assignment process have been presented. Categorizations of the channel assignment techniques are also illustrated. Channel assignment techniques have also been compared.

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