This paper proposes UFlood, a flooding protocol for wireless mesh networks. UFlood targets situations such as software updates where all nodes need to receive the same large file of data, and where limited radio range requires forwarding. UFlood's goals are high throughput and low airtime, defined respectively as rate of completion of a flood to the slowest receiving node ...

We present RODEO, a RObust and rapidly DEplOyable wireless mesh network designed for applications such as disaster management. Natural disasters often destroy existing communication infrastructure, thus forcing rescue teams to deploy their own networks for communication. Such networks must be rapidly deployable, capable of recovering from node failure, have a large coverage area, and at the same time meet the ...

The military is increasingly using sensors as part of its battlefield strategy. Sensors can be used as an alternative to placing soldiers in dangerous situations and the information that sensors collect helps leaders make better decisions. However, the cost of integrating these sensors into existing tactical networks has been a limiting factor in their adoption. Thus, the research team sought ...

This paper presents the design and implementation of PUMA, a declarative constraint-solving platform for policy-based routing and channel selection in multi-radio wireless mesh networks. In PUMA, users formulate channel selection policies as optimization goals and constraints that are concisely declared using the PawLog declarative language. To efficiently execute PawLog programs in a distributed setting, PUMA integrates a ...

Wireless mesh networks (WMNs) have become immensely popular these days. In order to satisfy user service requirements, multimedia applications need quality of service (QoS) support. Since the mesh routers are usually stationary in WMNs, a better performance is expected in WMNs as compared to ad hoc networks. But sustaining QoS in wireless mesh networks still remains a challenging task. A ...

With the popularity of different wireless access technologies for Internet access, the integration of heterogeneous wireless networks is foreseen in the near future. Solutions for secured Internet access in such scenario become an urgent requirement. In this paper, we present SHAWK, a platform for secure integration of heterogeneous advanced wireless networks, including cellular networks, wireless local area networks (WLANs) and ...

Wireless mesh networks (WMNs) are promising networks in the future Internet environments due to their self-configuration and ease of deployment. Although streaming and real time applications are possible using current mobile devices, these applications still suffer from low quality. Because link failures are not reported in congested situations, the existing routing protocols do not capture these deteriorations. An extension ...

The link delivery probability in a wireless mesh network is most accurately determined only by experiment, as it depends on many factors, including environment characteristics, transmission power, distance between transmitter and receiver, channel fading, and background noise. This paper provides an insightful framework for characterizing link performance results produced at Qatar University (QU) wireless mesh test-bed under harsh environmental ...

This paper studies video multicasting in large-scale areas using wireless mesh networks. The focus is on the use of Internet access gateways that allow a choice of alternative routes to avoid potentially lengthy and low-capacity multihop wireless paths. A set of heuristic-based algorithms is described that together aim to maximize reliable network capacity: the two-tier integrated ...

The Wireless Mesh Network (WMN) has already been recognized as a promising broadband access network technology from both academic and commercial perspective. In order to improve the performance of WMNs, extensive research efforts have been dedicated towards finding means to increase the number of simultaneous transmissions in the network while avoiding signal interference among radios. In case of WMNs based ...

Wireless Mesh Network (WMN) has become an important edge network to provide Internet access to remote areas and wireless connections in a metropolitan scale. In this paper, we study the problem of identifying the maximum available bandwidth path, a fundamental issue in supporting quality-of-service in WMNs. Due to interference among links, bandwidth, a well-known bottleneck metric in ...

Opportunistic routing (OR) is a viable approach for improving performance of wireless communications. Previous studies on OR have focused on cost minimization, performance of multiple rates, congestion control, and other issues. Bandwidth assurance over OR, however, has not been adequately investigated. To bridge this gap, we present a bandwidth-aware opportunistic routing (BOR) with admission control (AC) protocol named BOR/...

There are many commercial wireless mesh networks(WMN) products available in the market but incompatibility issues exist as the method to achieve WMN for each vendor is different and proprietary. This has led to the research of the embedded solution that implements the WMN in accordance with the 802.11s draft standard. In this implementation, it allows the legacy system ...

As Wireless Mesh Networks (WMNs) have been increasingly deployed, where users can share, create and access videos with different characteristics, the need for new quality estimator mechanisms has become important because operators want to control the quality of video delivery and optimize their network resources, while increasing the user satisfaction. However, the development of in-service Quality of Experience (QoE) ...

Teams of students across four semesters have serially designed subsystems to be integrated into a cohesive immersive training vest system for military applications. The vest enhances the ability to provide realistic and real-time feedback on both battlefield effects (e.g. weapons fire) as well as performance information (e.g. correct/incorrect cultural response). The integrated system provides improved capabilities ...

In this paper, we propose a packet forwarding scheme to reduce the power consumption in wireless mesh networks. To save the transmission power, the proposed scheme utilizes a network coding (NC) method. Since the quantity of the forwarded packets can be reduced by NC, the energy consumption for packet transmission (TX) can be reduced. However, the energy consumption for packet ...

In wireless mesh networks, mesh nodes equipped with multiple radios tuned to multiple non-overlapping channels bring high network performance. As wireless mesh networks have been deployed in the urban area, dynamic channel allocation is more challengeable because co-located wireless networks are likely to be tuned to the same channels and may interfere with communication. This paper proposes an ...

Wireless Mesh Networks have been traditionally deployed to offer Internet access. Following the general trend of convergence, they must increasingly provide customers with communication services whose quality constraints are heterogeneous. For large scale deployments, access to the Internet is provided by multiple gateways installed at different points in the network. Each gateway may be connected to the Internet with different ...

This paper considers the NP-hard problem of scheduling weighted links in concurrent transmit/receive wireless mesh networks. The problem generalizes existing works to links with weight w_{ij}≥ 1. We propose an O(|V|^2) algorithm, where V is the set of routers, that is orders of magnitude faster than computationally intensive approaches that use the well-known ...

Recently, intelligent systems for agricultural production are being developed for safe and low cost food production. Plant factory provide high yield by growing multiple crops and making efficient use of land and resources. Plant growth is facilitated by maintaining humidity, temperature, CO2 concentration and light intensity and these factors need to be monitored and maintained for an automated system. In ...

Tree-based routing protocols in low-rate wireless mesh networks usually have the detour problem in return for the no route discovery overhead. In this paper, we propose a novel algorithm, named Incremental Path Reduction (IPR), which incrementally shortens inefficient detoured path as more data packets are delivered. In IPR, data packets are delivered along the tree route in use ...

This paper presents user-centric energy efficient lighting control architecture for street lamps. The system utilizes ZigBee technology to implement wireless mesh network of street lamps. The coordinator, serving as gateway between ZigBee nodes and internet, relays information of interests to remote user. The proposed system comprises of LED lamps, gateway node, and management software that offer remote monitoring and ...

The objective of this paper is to study the impact of advanced physical layer techniques on the maximum achievable throughput of wireless multihop mesh networks. We formulate a cross-layer optimization framework for the routing and scheduling problem jointly with the following physical layer techniques: successive interference cancellation, superposition coding, dirty-paper coding and their combinations. In the case when ...

Two main issues that are involved in the performance of multichannel multiradio wireless mesh networks (WMNs) are channel assignment (CA) and multichannel routing (MCR). The joint CA and MCR problem has been proven to be NP-hard. In this paper, we propose to apply genetic algorithms for the CA problem and tackle MCR using linear-programming techniques. Because CA and ...

The increasing demand for large and low cost wireless coverage, ranging from campus to city wide areas, has motivated a high interest in multi-hop communications with IEEE 802.11s as the most significant and successful standard for wireless mesh networks. Although IEEE 802.11s introduces new interworking, routing and wireless frame forwarding at the link layer, the multi channel ...

Recent studies about climate change are mandating a drastic reduction of green house gas (GHG) emissions. Solutions include the utilization of renewable energy sources (e.g., wind, solar energy) and the increased utilization of hybrid and electric vehicles (EVs). In this scenario ICT can play a significant role by fostering the smart utilization of current energy and transportation infrastructures (smart ...

Wireless communication has become prominent due to its ubiquitous computing. Addressing privacy enhanced security mechanism in Wireless Mesh Networks (WMNs) is a challenging task. Classical solution to address the foresaid issue offers conditional security, which does not guarantee secure routing mechanism as it can be broken by quantum computing. In this paper, a new method is proposed which integrates quantum ...

This project focuses on both dynamic channel assignment and multi-interface is used to improve the flexibility and the capacity of wireless mesh networks (WMNs). However, overheads that are generated by uncontrolled interface switching adversely decrease the performance of WMNs. To overcome the trade-off between flexibility and switching overheads, we propose a Hybrid channel-assignment protocol (HCAP) for multi-...

Seamless handoff support is an essential issue to ensure continuous communications in multi-hop wireless mesh networks (WMNs). Due to the multi-hop transmission of network-layer handoff signaling packets, the handoff performance in WMNs can be largely degraded by the long queueing delay and medium access delay at each mesh router, especially when the backbone traffic volume is high. ...

Recent advances in highly tunable radios, along with new spectrum policies have paved the way for design of mesh networks over spectrum that is non-contiguous, and has diverse propagation characteristics. Notable examples are multi-band WiMAX mesh, wireless mesh over digital TV white-spaces. The design of multihop wireless networks that can tune into any part of such large ...

With the advances in wireless technologies and the explosive growth of the Internet, wireless networks, especially Wireless Mesh Networks (WMNs), are going through an important evolution. Designing efficient WMNs has become a major task for networks operators. Over the last few years, a plethora of studies has been carried out to improve the efficiency of wireless networks. However, only a ...

The practical limitations and challenges of radio frequency (RF) based communication networks have become increasingly apparent over the past decade, leading researchers to seek new hybrid communication approaches. One promising strategy that has been the subject of considerable interest is the augmentation of RF technology by Free Space Optics (FSO), using the strength of each communication technology to overcome the ...

In this paper we present a case for Smart Metering to be a prime application of TV White Spaces (TVWS) and investigate network architecture to enable smart metering communication in TVWS that ensures access reliability, primary user protection (if one exists) and efficient use of spectrum. We consider the communication access network connecting the smart meters to the concentrator as ...

The IEEE 802.11s standard defines a path selection algorithm, named HWMP (Hybrid Wireless Mesh Protocol) which combines on-demand path selection mode with a proactive tree building mode. The proactive tree building mode in HWMP periodically maintains the routing table according to a constant value. Varying this value will affect directly the number of messages transmission, the accuracy of ...

Wireless mesh networks comprise nodes with multiple radio interfaces, and can provide lowcost high-speed Internet access or connectivity for data transfer. In this article we report our experiences and investigations with an experimental metropolitan multiradio mesh network that covers an area of approximately 60 km2 in the city of Heraklion, Crete. We present the design and deployment of the ...

Unsegmented network coding was incorporated into opportunistic routing to improve inefficient schedule of segmented network coding due to delayed feedback. However, most unsegmented network coding schemes fail to constrain the size of decoding window. Large decoding window not only challenges limited computational ability and decoding memory in practical environments, but also introduces large decoding delay, which is undesirable in delay ...

Wireless Mesh Networks (WMNs) are being developed actively and deployed widely for a variety of applications, such as public safety, environment monitoring, and citywide wireless Internet services . They have also been evolving in various forms (e.g., using multiradio/channel systems to meet the increasing capacity demands by the above-mentioned and other emerging applications. However, due to heterogeneous and ...

Wireless mesh network has been considering as promising technology for next generation that provides a better services and guarantee to different internet applications. AODV routing protocol is being considered as routing protocol in hybrid wireless mesh network. Route breaks in mobile mesh client is one of the research issues in hybrid wireless mesh network, especially if the traffic comes from ...

Next generation telematic services are expected to play a key role in future automotive applications. In order to achieve strong integration between the services and the underlying network infrastructure there is a need for both simulation and emulation of the entire system. This paper presents a combined simulation and emulation approach for telematic services prototyping in an emulated wireless vehicular ...

A new analytical model is proposed to investigate the delay and throughput in cognitive mesh networks. The validity of the model is demonstrated via extensive simulation experiments. The model is then used to evaluate the effects of the number of licensed channels and channel utilisation on the network performance.

As Wireless Mesh Networks (WMNs) are being increasingly deployed, there is an increasing demand for new quality assessment mechanisms that allow service operators to evaluate and optimize the utilization of network resources, while ensuring a good quality level on multimedia applications as perceived by end-users. However, existing real-time assessment schemes for WMNs are not capable of capturing the ...

In this paper, for improving the performance of Transmission Control Protocol (TCP) over Wireless Mesh Network (WMN), we introduce a new TCP loss recovery algorithm called T-NCE (A Timestamp based detection of Non-Congestion Events) which is able to detect the Non-Congestion events such as transmission errors and packet reordering and differentiate the loss of packets due to ...

Wireless Mesh Networks (WMNs) are currently attracting a lot of attention from wireless research and technology community due to their importance as means for providing cost-efficient broadband wireless connectivity. WMNs are based on mesh topology, in which every node is connected to one or more nodes, enabling thus the information transmission in more than one path. In this paper, ...

Deploying SIP services in wireless mesh networks is valuable for communication scenarios without infrastructure. In traditional method of SIP service provision, severs work individually without cooperation, and there exist such problems as low availability of resources and high cost of information update. In our multi-servers cooperation scheme for providing SIP services in wireless mesh networks, all servers are placed ...

In wireless mesh networks, with the standard Optimized Link State Routing (OLSR) metric (i.e. hop count), traffic is routed on the shortest path without considering factors such as traffic distribution and link capacities. Consequently, some nodes may get overloaded from the uneven utilization of network resources. OLSR can be modified to use other link cost metrics, with route selection ...

Security and Efficiency are the basic requirement of a user in any network. We are also presenting the work on efficiency problem in wireless distributed network. The proposed work is about to minimize the load in congested network. We are representing an intelligent approach using Min-Max algorithm. It is a host based approach that will convert each node as ...

Wireless sensor networks have been proved to be mature technologies to monitor nature reserves for wildlife and ecological environment protection. Nature reserves are particularly wide-area and consist of complex terrains. Moreover most of them have no 2G/3G coverage due to their sparse population. The data collected by sensor networks were delivered to the end user either by high-...

Although static mesh networks lack mobility, yet research shows that route breakages are quite frequent for reactive protocols in 802.11-based static mesh networks. In 802.11, a link is considered broken if a fixed number of consecutive transmission attempts fail at link-layer. However, transmissions failures can be temporary and may occur due a number of reasons including ...

Seamless intergateway handoff support is an essential issue to ensure continuous communications in Internet-based wireless mesh networks (WMNs). Due to the existence of multihop wireless links, traditional handoff schemes designed for single-hop wireless access networks can hardly guarantee the low handoff latency requirement in multihop WMNs. Existing solutions on reducing the handoff delay in WMNs ignore one important ...

This work presents an admission control mechanism for multi-hop wireless mesh networks based on the IEEE 802.11e standard and the OLSR routing protocol. This mechanism, called CAC-OLSR, aims at ensuring that traffic flows with quality of service (QoS) requirements are only admitted in the mesh network if it has available resources in order to provide flow requirements. ...

Published in 2012]]>http://academic.research.microsoft.com/Publication/56960325Tue, 21 May 2013 20:00:00 GMT56960325Sritrusta Sukaridhoto, Nobuo Funabiki, Toru Nakanishi, Kan Watanabeview publication

As an inexpensive and scalable Internet access network, we have studied the architecture, protocols, and design optimizations of the Wireless Internet access Mesh Network (WIMNET). WIMNET is composed of multiple access points (APs) that are connected through wireless links. Previously, we have proposed the concept of the CSMA-based Fixed Back off-time Switching (CSMA-FBS) method for WIMNET to ...

Dedicated control channel protocol is a kind of classic multi-channel MAC (Medium Access Control) protocol, in which a common channel is used as a control channel to negotiate, and the remaining channels are used for data exchange. However, a large number of overhead produced in channel consultation easily leads to control channel saturation problem, which reduces both the network ...

In this letter, we focus on transmission side diversity and energy efficient routing in a wireless mesh network of cellular base stations. Our aim is to design a cooperative routing algorithm which takes the active radio electronic power consumption into consideration when constructing the minimum power route from source to destination. We introduce the concept of supernode with improved power ...

IEEE 802.11 based wireless mesh networks can exhibit severe fairness problem by distributing throughput among different flows originated from different nodes. Congestion control, Throughput, Fairness are the important factors to be considered in any wireless network. Flows originating from nodes that directly communicate with the gateway get higher throughput. On the other hand, flows originating from two or more ...

In this paper carried out a review and classification of existing channels frequency distribution methods in multichannels mesh network of IEEE 802.11 standard.

This paper quantifies the impact of topological characteristics on the performance of single radio multichannel IEEE 802.11 mesh networks. Topological characteristics are the number of nodes per subnetwork, the hop count, the neighbor node density, the hidden nodes, the number of nodes in the neighborhood of the gateway, and the hidden nodes in the neighborhood of the gateway. Network ...

To achieve ubiquitous connectivity, the Wireless Mesh Network is ideal for customers to access the growing array of services in the last mile where wired networks are prohibitively expensive to set up or simply inappropriate. This work focuses on improving bandwidth fairness where a number of different services are competing in the access link of the wireless mesh networks. We ...

Sewer and gully blockages are the main cause of residential sewer flooding in the U.K. A low-cost and power efficient wireless sensor mesh networking communication system has been designed, developed and implemented to provide adequate warning on potential blockage incidents to prevent sewer failure. By monitoring the water level of the gully pot at each residential property, the ...

Wireless Mesh Networks (WMNs) are being called upon to improve their management policies to support a wide range of multimedia applications. As gateways towards wired networks are potential bottlenecks, cluster load balancing routing methods between multiple gateways play a central role in the routing management of the WMNs. This is especially important for demanding interactive applications, for instance triple play ...

Spatial reuse is a central aspect in the efficiency of wireless mesh networks. Accurate inter-link interference measurement and estimation is necessary for such spatial reuse. In this work, we explore in depth Signal to Interference Ratio (SIR) based interference modeling. We take a measurement centric approach, characterizing the SIR versus PDR (Packet Delivery Ratio) relationship in outdoor mesh network ...

Wireless Mesh Networks (WMNs) provide ubiquitous Internet access for mobile users by integrating wired and wireless networks and are a valuable component of new generation communication systems. As gateways towards wired networks are potential bottlenecks, load balancing between multiple gateways plays a central role in the performance of the WMNs. This is especially important for demanding interactive applications such as ...

In this paper, we present a distributive heuristic algorithm for maximizing the network throughput in adaptive power and adaptive rate spatial-TDMA wireless mesh networks. At each step of our algorithm, the link with highest receive Signal-to-Interference and Noise Ratio in its neighborhood is included in the schedule that is set for the underlying time slot, configuring its ...

The article introduces a two-index model of the distribution channels in the multiradio multichannel wireless mesh networking (MR-MC WMN) standard IEEE 802.11. The model describes the process of distribution channels in both homogeneous and in heterogeneous MR-MC WMN.

The wormhole attack is a severe attack in Wireless Mesh Networks (WMNs). It involves two or more wormhole endpoints colluding to capture traffic from one place in the network and replay it to another faraway place through a secret tunnel, so as to distort network routing. It may lead to even more serious threats such as packet dropping and denial ...

This paper proposes cooperative opportunistic routing (COR), a throughput improvement scheme for the cooperative opportunistic routing in multi-hop wireless mesh networks (WMNs). We investigate the two major issues in opportunistic routing, the selection and the prioritization metric for the candidate set. The COR is presented to select and prioritize the candidate node with minimum expected cost. This candidate selection ...

Sensor nodes in wireless networks often use batteries as their source of energy, but replacing or recharging exhausted batteries in a deployed network can be difficult and costly. Therefore, prolonging battery life becomes a principal objective in the design of wireless sensor networks (WSNs). There is little published data that quantitatively analyze a sensor node's lifetime under different operating ...

Since multi-radio multi-channel wireless mesh networks are widely brought into use, the channel assignment scheme plays a critical role in determining the performance of wireless mesh networks. Nowadays many channel assignment schemes have been proposed to enhance the performance of the wireless networks. However, most of the existing schemes assume that all the interference links induce the same ...

Supporting mesh clients roaming without negative impact on the services with high priority is an important challenge in the design and deployment of a wireless mesh network which has emerged as a promising last mile broadband wireless access technology. In this paper, to improve the network performance, a handoff management scheme is proposed for wireless mesh networks. When the mesh ...

We propose a novel Pub/sub protocol for Wireless Mesh Networks based on Heuristic Markov Chain, namely HMCPS, which can reliably and efficiently deliver events to mobile clients in a continuous manner. Using Heuristic Markov Chain, HMCPS predicts hot locations where a mobile client may stay with high probability, and then delivers interesting events to the hot locations in an ...

Wireless mesh networks (WMNs) have recently emerged as a promising technology for next-generation of wireless communications. In WMNs, admission control is deployed to control traffic loads and to prevent the wireless mesh backbone from being overloaded. Existing admission control protocols could be classified as either stateful or stateless approaches, based on network state information. Both the approaches have their ...

Multicast is used in numerous real-time applications which have high demand on quality of service (QoS). When a number of multicast applications are deployed in a wireless mesh network (WMN), network virtualization technology can be used to guarantee the QoS for each application. Since wireless links are unreliable, packet loss is inevitable when the multicast service-oriented virtual networks (...

Multi cast communication is a key technology for wireless mesh networks. Multicast provides efficient data distribution among a group of nodes, Generally sensor networks and MANETs uses multicast algorithms which are designed to be energy efficient and to achieve optimal route discovery among mobile nodes whereas wireless mesh networks needs to maximize throughput. Here we propose two multicast algorithms: The ...

We investigate the dynamics of field based anycast routing (FAR) in wireless mesh networks (WMNs), which is a hybrid routing scheme of geographic routing and back-pressure routing. Conventional FAR is equipped with a constant tuning parameter which controls degrees of influences of geographic routing and back-pressure routing. This generic feature limits the capability of FAR only for a ...

In this paper, we explore the use of wireless mesh networks (WMN) for the purpose of exchanging GPS raw data within GPS stations in a WMN to support real-time in-network processing of low-cost single-frequency GPS devices. A proof of concept deployment with a small number of GPS stations was studied. This experiment validates the feasibility of ...

As energy saving and environmental protection become an inevitable trend, researchers need to shift their focus to “green” oriented architecture design. Recent advances in the area of cognitive radio (CR) have significant potential towards “green” communications. One of the critical challenges for operating CRs in a wireless mesh network is how to efficiently allocate transmission powers and frequency resource among ...

Wireless mesh network management is more complex than wired network management mainly because of network resource constraints and link quality variability. Therefore, monitoring solutions for wired networks do not achieve satisfactory performance in mesh networks. There are several techniques and tools proposed in the literature for wireless mesh network management. Each of those techniques and tools usually includes a set ...

In order to use the available capacity of OFDM/TDMA wireless mesh networks as efficiently as possible, the maximum number of simultaneous transmissions must be scheduled in such a way that collisions are avoided. In order to achieve this goal, we introduce a scheduling algorithm that assigns both time slots and channels to wireless transmission links in a conflict free ...

Wireless mesh networks (WMNs) are emerging as a cost effective solution for last-mile broadband access. Multiple antennas or multiple input multiple output (MIMO)-based systems have the potential for improving the capacity of these networks manifolds. However, unique physical layer characteristics associated with MIMO-based systems require joint design among physical layer and upper layers. In this paper, we ...

Wireless mesh networks (WMNs) are increasingly being deployed as backbone wireless networks for broadband Internet access. Use of multiple radios and multiple channels (MRMC) can bring substantial throughput improvement to these networks. In addition, multi-antennas or Multiple Input Multiple Output (MIMO) technology has great potential for improving the throughput of WMNs via spatial reuse and/or spatial multiplexing. In ...

Recently, a pointer forwarding scheme (PFS) was proposed to reduce location update overhead in wireless mesh networks. Using the PFS, location update is replaced with a simple forwarding pointer setup between two neighboring MRs until the forwarding chain K is less than or equal to the configurable parameter Kmax for each MC. However, in PFS, if the two MRs are ...

The great potential of Wireless Mesh Networks (WMNs) is their autonomy of being built and formed without the need of any infrastructure. An IEEE 802.11s standard draft has been lately designed to define the WMNs framework and architecture. Multi-channel multi-radio wireless mesh networks (MCMR WMNs) have been introduced to improve system performance. However, interfaces and channels management ...

Recent advances in wireless communication standards and medical monitoring system have made it possible to effectively combine mesh networking with Non-Invasive medical application which is Pulse Oximeter in order to create reliable, large-scale wireless Network. This Mesh networking will enable doctors and nurses to observe and monitor a number of patients simultaneously from one location without being with ...

In 2011, Sun et al. [CHECK END OF SENTENCE] proposed a security architecture to ensure unconditional anonymity for honest users and traceability of misbehaving users for network authorities in wireless mesh networks (WMNs). It strives to resolve the conflicts between the anonymity and traceability objectives. In this paper, we attacked Sun et al. scheme's traceability. Our analysis showed that ...

Aimed at the puzzle of being hard to actualize the monitoring of water quality resulted from massive land and complex terrain in rivers and lakes, in order to make monitoring of the water quality get more flexible, faster, easier and accurate, the paper designed a sort of monitoring system of rivers and lakes in water environment based on WSN. In ...

Interactive networks are vulnerable to various attacks due to the existence of malicious nodes which do not comply with the network protocol so as to achieve their own purposes. For example, in a peer-to-peer (P2P) streaming system, since each peer needs to participate in uploading data to other peers, malicious peers may choose to upload bogus data so ...

Back-pressure scheduling is known to play a crucial role in operating wireless mesh networks (WMNs). In this letter, we expand the back-pressure scheduling with broader control parameters for a selected practical domain. To solve this expanded problem, we propose a virtual-pressure scheduling algorithm that tries to find the control parameters for improving throughputs by monitoring the results ...

Multiple-Input Multiple-Output (MIMO) technology has great potential for improving the throughput of Wireless mesh networks (WMNs). In this paper, we investigate joint rate allocation, routing, and stream control scheduling problem in MIMO-based WMNs, where multiple antennas are exploited to increase the capacity via interference suppression (IS) and/or spatial multiplexing (SM). The notion of transmission configuration (TC) ...

Nowadays authentication in Wireless Mesh Networks (WMN) refers to the 802.1X authentication methods or a Preshared key authentication, and makes use of certifcates or shared secrets. In wireless environments, the management of certifcates is a cumbersome task as certifcates require deploying a Public Key Infrastructure (PKI) and Certifcation Authorities (CA). They also require defning a certifcate management policy to ...

In this paper, we address the problem of guaranteed transmission of video flows in the context of WiMAX mesh networks for video surveillance purposes. The main design issue in such networks is to maximize the number of flows that can be accommodated in critical situations. Guaranteeing a throughput for individual flows in a multi-hop WiMAX network is a challenging ...

Wireless mesh network (WMN) is an emerging technology for last-mile broadband Internet access. Despite extensive research on and even commercial implementations of WMNs, there are still some serious performance issues in the transport layer, where the performance of Transmission Control Protocol (TCP) degrades dramatically as the number of hops increases. Improving TCP performance over WMNs is a research area ...

In wireless mesh networks, a robust synchronization is an enabler for optimizing performance, for example allowing powerful radio resource management and energy saving. In this paper, we combine a consensus algorithm, already proven efficient for the synchronization of wireless mesh networks, with a random broadcast for fully distributing its implementation. Unfortunately, when the distances between the wireless devices increase, the ...

Wireless mesh networks (WMNs) experience frequent link failures caused by channel interference, bandwidth demands causes severe performance degradation in WMNs. Link failure will lead to produce a sequence of disruptions to deliver the packets to the destination. To overcome this ART rerouting the traffic via an alternative path from a node whose local link is down without the need to ...

Advantages of wireless fieldbuses, as cabling cost reduction, improved scalability and flexibility, are well known. In particular, the advent of WirelessHART, the first open and standard protocol dedicated to process control, has made wireless adoption a reality in industrial applications. This paper deals with the performance evaluation of WirelessHART network applied to a real-world testbed. The characterization of the ...

Streaming video over the Internet to wireless mobile devices has seen a tremendous increase in popularity amongst users. Recent improvements in infrastructure have made the delivery of video over wireless a reality. However, user demand for high definition video streams promises to quickly devour the bandwidth provided by these improvements. There has been extensive work to solve these problems. However, ...

Station association information, such as an associated mesh router is required to support communication between legacy stations in Wireless Mesh Networks (WMN). Current IEEE 802.11s draft standard specifies two mechanisms to maintain the station association information: Proxy Registration Procedure (PRP) and Association Discovery Protocol (ADP). Each of them has structural limitations in that mesh routers always maintain a station ...

Smart grids are critical cyber-physical infrastructures in the world now. Since these infrastructures are prone to large scale outages due to disasters or faults, a resilient and survivable communication architecture is desired. In this work, we propose a resilient and survivable hierarchical communication architecture for the smart grid that mirrors the hierarchy of the existing power grid. Post-disaster ...

It is not easy to supervise and manage nonstandard and illegal network operations in open wireless environment with multi-hop relay transmission in Mesh networks. To solve the non-repudiation issue on a user's posting operation when accessing the Internet via a wireless Mesh network, a novel non-repudiation scheme for a user's posting operation is proposed based ...

Wireless networks operate in rapidly changing environments. Often parameters for particular algorithms are set with particular environments in mind, or assume certain conditions. When conditions change from interference, user mobility, handover and changing demand, the network may be unable to cope. To solve some of these problems we propose an online evolutionary approach to parameter computation. The online approach allows ...