scholarly journals Analysis of Denial of Service Impact on Data Routing in Mobile eHealth Wireless Mesh Network

2016 ◽  
Vol 2016 ◽  
pp. 1-19 ◽  
Author(s):  
Shaker Alanazi ◽  
Kashif Saleem ◽  
Jalal Al-Muhtadi ◽  
Abdelouahid Derhab
Keyword(s):  
Wireless Networks ◽  
Mesh Networks ◽  
Denial Of Service ◽  
Data Communication ◽  
Cost Effective ◽  
Mesh Network ◽  
Delivery Ratio ◽  
Wireless Mesh ◽  
Wireless Medium ◽  
Information Transfers

Wireless mesh networks (WMNs) are a promising technology that has emerged with the combination of several wireless networks. These wireless networks and devices communicate in a mesh network manner, to provide edge-to-edge, easy, and cost-effective data communication. Many current and future promising applications depend on WMN and one of the most important applications is eHealthcare, where the confidential information transfers with the help of WMN. WMN devices communicate over a wireless medium, which opens the system to a number of vulnerabilities; thus, an intruder can launch malicious activities through many types of attacks that can result in denial of service (DoS). In this paper, the available solutions to overcome these attacks are simulated and evaluated in terms of data packet delivery ratio, end-to-end delay, and network throughput and under different cases of static and mobile WMNs, which helps in providing suggestions to enhance existing protocols and mitigate the effect of DoS caused by such attacks.

QoS-Aware Service Selection and Multicast Framework for Wireless Mesh Networks

2016 ◽  
Vol 12 (1) ◽  
pp. 1-15 ◽  
Author(s):  
A. Narayana Rao ◽  
Ch. D. V. Subba Rao
Keyword(s):  
Data Transmission ◽  
Mesh Networks ◽  
Service Selection ◽  
Video Data ◽  
Mesh Network ◽  
Delivery Ratio ◽  
Wired Networks ◽  
Wireless Mesh ◽  
Security And Reliability ◽  
Effective Path

Wireless Mesh Network (WMN) is a multi-hop, multi-path network that has become the most favored method in delivering end-to-end data, voice and video. Data transmission through WMN has the security and reliability, same as the conventional wired networks. Since, WMN has a decentralized topology, maintaining QoS is very crucial. Hence in this work, we propose to develop a WMN that selects services based on high QoS. In order to avoid redundancy in data transmission, in this work we propose to develop an efficient framework for multicasting by determining the most effective path for transmitting the same data towards multiple destination nodes. By simulation results, we show that the proposed technique provides better QoS in terms of throughput and packet delivery ratio.

Opportunistic Frame Forwarding in Wireless Mesh Networks

2015 ◽  
Vol 764-765 ◽  
pp. 941-945
Author(s):  
Shih Tsung Liang ◽  
Bo Yi Song ◽  
Yu Yao Su
Keyword(s):  
Wireless Mesh Networks ◽  
Mesh Networks ◽  
Opportunistic Routing ◽  
Wireless Channel ◽  
Mesh Network ◽  
Delivery Ratio ◽  
Delivery Probability ◽  
Wireless Mesh ◽  
Deterministic Routing ◽  
The One

Opportunistic routing has been shown to achieve the high throughput of the wireless mesh network with lossy channels. Different from deterministic routing mechanisms in which a frame is <em>transmitted</em> and forwarded along with a fixed and predetermined <em>path</em>, the opportunistic routing technique allows multiple nodes hearing the frame to form the forwarder set containing promising candidates for the frame forwarding. Existing opportunistic routing protocols typically choose among forwarding candidates based on the decision made from the transmitter disregarding the current loads in candidates. In this paper, the opportunistic frame forwarding mechanism with considering backlog of frames among forwarders is proposed and analyzed. Specifically, in addition to take into account the delivery probability, our proposal restricts members of the forwarder set for a given transmitter to those wireless nodes whose transmission range covers one another and makes the true forwarder picked from the forward set of a given transmitting frame being the one who gains access to wireless channel for the frame before others do. Therefore, the efficient and load-balanced opportunistic routing for wireless mesh networks can be achieved. Analytic results show that the proposed method compared to the deterministic routing methodology can achieve the high frame delivery ratio.

scholarly journals Application of an Queuing Model to WiMAX-Based Wireless Mesh Networks: Grid Topology Case Study

2012 ◽  
Vol 2012 ◽  
pp. 1-22
Author(s):  
Vahid Sattari Naeini ◽  
Naser Movahhedinia
Keyword(s):  
High Performance ◽  
Performance Metrics ◽  
Mesh Networks ◽  
Cost Effective ◽  
Mesh Network ◽  
Queuing Model ◽  
Basic Step ◽  
Broadband Internet ◽  
Mesh Structure ◽  
Wireless Mesh

Wireless mesh networking is an effective approach to reach high performance in the last mile of broadband Internet access. The mesh structure is the basic step toward providing cost-effective, dynamic, and high-bandwidth wireless connection. In this paper, WiMAX-like wireless mesh network is considered, emphasizing the grid arrangement which is the general topology described in the literature. To evaluate the performance of the conventional and proposed scheduling algorithms, each link is modeled using an M/D/1 queue and a virtual node concept is introduced to describe comparable performance metrics for the system. Performance measures of the system in addition to the simulation results are assessed in terms of the network length and the arrival rates.

Link Capacity Based Channel Assignment (LCCA) for Cognitive Radio Wireless Mesh Networks

2013 ◽  
Vol 65 (1) ◽  
Author(s):  
Wajahat Maqbool ◽  
Sharifah K. Syed Yusof ◽  
N. M. Abdul Latiff ◽  
Hashim S. ◽  
Rahat U. ◽  
...  
Keyword(s):  
Cognitive Radio ◽  
Wireless Mesh Networks ◽  
Channel Assignment ◽  
Mesh Networks ◽  
Mesh Network ◽  
Delivery Ratio ◽  
Link Capacity ◽  
Wireless Mesh ◽  
User Activity ◽  
Decision Engine

Cognitive radio wireless mesh network (CRWMN) is expected as an upcoming technology with the potential advantages of both cognitive radio (CR) and the wireless mesh networks (WMN). In CRWMN, co-channel interference is one of the key limiting factors that affect the reception capabilities of the client and reduce the achievable transmission rate. Furthermore, it increases the frame loss rate and results in underutilization of resources. To maximize the performance of such networks, interference related issues need to be considered. Channel assignment (CA) is one of the key techniques to overcome the performance degradation of a network caused by the interferences. To counter the interference issues, we propose a novel CA  technique which is based on link capacity, primary user activity and secondary user activity. These three parameters are fed to the proposed weightage decision engine to get the weight for each of the stated parameters. Thus, the link capacity based channel assignment (LCCA) algorithm is based on the weightage decision engine. The end-to-end delay, packet delivery ratio and the throughput is used to estimate the performance of the proposed algorithm. The numerical results demonstrate that the proposed algorithm is closer to the optimum resource utilization. 

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.

A Wireless Mesh Network Node Query Method Research

2013 ◽  
Vol 416-417 ◽  
pp. 1570-1573
Author(s):  
Zhi Gang Wang
Keyword(s):  
Data Transmission ◽  
Wireless Mesh Network ◽  
Mesh Networks ◽  
Data Communication ◽  
Mesh Network ◽  
Slave Node ◽  
Wireless Mesh ◽  
Recursive Search ◽  
Manufacturing Time ◽  
Slave Mode

In the wireless mesh networks, identification of nodes does not need to set the address, only take the manufacturing time of the node as the sequence to identify. Nodes in the query and data transmission adopt a master - slave mode. The center node initializes slave-node according to the node of the manufacturing time sequence, through the search command, search to find the slave-node. The newly found node recursive search is for the next batch of nodes. Eventually form a wireless mesh network. Center nodes and the nodes of data communication are made by mesh network.

DETECTION AND IDENTIFICATION OF ANOMALIES IN WIRELESS MESH NETWORKS USING PRINCIPAL COMPONENT ANALYSIS (PCA)

2009 ◽  
Vol 10 (04) ◽  
pp. 517-534 ◽  
Author(s):  
ZAINAB R. ZAIDI ◽  
SARA HAKAMI ◽  
TIM MOORS ◽  
BJORN LANDFELDT
Keyword(s):  
Wireless Networks ◽  
Anomaly Detection ◽  
Wireless Mesh Networks ◽  
Mesh Networks ◽  
Denial Of Service ◽  
Principal Component ◽  
False Alarms ◽  
Identification Scheme ◽  
Number Of False Alarms ◽  
Wireless Mesh

Anomaly detection is becoming a powerful and necessary component as wireless networks gain popularity. In this paper, we evaluate the efficacy of PCA based anomaly detection for wireless mesh networks (WMN). PCA based method [1] was originally developed for wired networks. Our experiments show that it is possible to detect different types of anomalies, such as Denial-of-service (DoS) attack, port scan attack [1], etc., in an interference prone wireless environment. However, the PCA based method is found to be very sensitive to small changes in flows causing non-negligible number of false alarms. This problem prompted us to develop an anomaly identification scheme which automatically identifies the flow(s) causing the detected anomaly and their contributions in terms of number of packets. Our results show that the identification scheme is able to differentiate false alarms from real anomalies and pinpoint the culprit(s) in case of a real fault or threat. Moreover, we also found that the threshold value used in [1] for distinguishing normal and abnormal traffic conditions is based on assumption of normally distributed traffic which is not accurate for current network traffic which is mostly self-similar in nature. Adjusting the threshold also reduced the number of false alarms considerably. The experiments were performed over an 8 node mesh testbed deployed in a suburban area, under different realistic traffic scenarios. Our identification scheme facilitates the use of PCA based method for real-time anomaly detection in wireless networks as it can filter the false alarms locally at the monitoring nodes without excessive computational overhead.

COORDINATED DISTRIBUTED SCHEDULING IN WIRELESS MESH NETWORK

2012 ◽  
Vol 3 (3) ◽  
pp. 368-374
Author(s):  
Usha Kumari ◽  
Udai Shankar
Keyword(s):  
Network Performance ◽  
Mesh Networks ◽  
Mac Protocol ◽  
Scheduling Algorithm ◽  
Ieee 802.16 ◽  
Distributed Scheduling ◽  
Mesh Network ◽  
Fourth Generation ◽  
Network Nodes ◽  
Wireless Mesh

IEEE 802.16 based wireless mesh networks (WMNs) are a promising broadband access solution to support flexibility, cost effectiveness and fast deployment of the fourth generation infrastructure based wireless networks. Reducing the time for channel establishment is critical for low latency/interactive Applications. According to IEEE 802.16 MAC protocol, there are three scheduling algorithms for assigning TDMA slots to each network node: centralized and distributed the distributed is further divided into two operational modes coordinated distributed and uncoordinated distributed. In coordinated distributed scheduling algorithm, network nodes have to transmit scheduling message in order to inform other nodes about their transfer schedule. In this paper a new approach is proposed to improve coordinated distributed scheduling efficiency in IEEE 802.16 mesh mode, with respect to three parameter Throughput, Average end to end delay and Normalized Overhead. For evaluating the proposed networks efficiency, several extensive simulations are performed in various network configurations and the most important system parameters which affect the network performance are analyzed

Performance Analysis of Energy Efficient Opportunistic Routing Protocols in Wireless Sensor Network

2019 ◽  
Vol 09 ◽  
Author(s):  
Premkumar Chithaluru ◽  
Rajeev Tiwari ◽  
Kamal Kumar
Keyword(s):  
Energy Consumption ◽  
Routing Protocols ◽  
Energy Efficient ◽  
Data Communication ◽  
Opportunistic Routing ◽  
Link Quality ◽  
Delivery Ratio ◽  
Performance Parameters ◽  
Wireless Medium ◽  
Reduce Energy Consumption

Background: Energy Efficient wireless routing has been an area of research particularly to mitigate challenges surrounding performance in category of Wireless Networks. Objectives: The Opportunistic Routing (OR) technique was explored in recent times and exhibits benefits over many existing protocols and can significantly reduce energy consumption during data communication with very limited compromise on performance. Methods : Using broadcasting nature of the wireless medium, OR practices to discourse two foremost issues of variable link quality and unpredictable node agility in constrained WSNs. OR has a potential to reduce delay in order to increase the consistency of data delivery in network. Results : Various OR based routing protocols have shown varying performances. In this paper, a detailed conceptual and experimental analysis is carried out on different protocols that uses OR technique for providing more clear and definitive view on performance parameters like Message Success Rate, Packet Delivery Ratio and Energy Consumption.

scholarly journals Context-Based Topology Control for Wireless Mesh Networks

2016 ◽  
Vol 2016 ◽  
pp. 1-16
Author(s):  
Pragasen Mudali ◽  
Matthew Olusegun Adigun
Keyword(s):  
Topology Control ◽  
Wireless Mesh Network ◽  
Network Performance ◽  
Mesh Networks ◽  
Negative Impact ◽  
Mesh Network ◽  
Adjustment Process ◽  
Spatial Reuse ◽  
Test Bed ◽  
Wireless Mesh

Topology Control has been shown to provide several benefits to wireless ad hoc and mesh networks. However these benefits have largely been demonstrated using simulation-based evaluations. In this paper, we demonstrate the negative impact that the PlainTC Topology Control prototype has on topology stability. This instability is found to be caused by the large number of transceiver power adjustments undertaken by the prototype. A context-based solution is offered to reduce the number of transceiver power adjustments undertaken without sacrificing the cumulative transceiver power savings and spatial reuse advantages gained from employing Topology Control in an infrastructure wireless mesh network. We propose the context-based PlainTC+ prototype and show that incorporating context information in the transceiver power adjustment process significantly reduces topology instability. In addition, improvements to network performance arising from the improved topology stability are also observed. Future plans to add real-time context-awareness to PlainTC+ will have the scheme being prototyped in a software-defined wireless mesh network test-bed being planned.

Sign in / Sign up

Export Citation Format

Share Document