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Designing a routing protocol for large low-power and lossy networks (LLNs), consisting of thousands of constrained nodes and unreliable links, presents new challenges. The IPv6 Routing Protocol for Low-power and Lossy Networks (RPL), have been developed by the IETF ROLL Working Group as a preferred routing protocol to provide IPv6 routing functionality in LLNs. RPL provides path diversity by building...
Using the new wireless capabilities in vehicles, various applications have appeared in Vehicular Ad Hoc Networks (VANETs). Multimedia data sharing is one of such applications, which has recently been given so much attention. Most presented schemes in this field are focused on direct opportunistic meetings between vehicles or request/response broadcast in the whole network, which are inefficient and...
Security requirements in sensor systems include resiliency against physical and side-channel attacks, low energy for communication, storage, and computation, and the ability to realize a variety of public-key protocols. Furthermore, primitives and protocols that enable trusted remote operation in terms of data, time, and location are essential to guarantee secure sensing. By integrating physically...
Wireless mesh networks (WMNs) are practical, simple, and cost effective solution for indoor and outdoor environments. Wireless Mesh networks use the IEEE 802.11 MAC protocol. Since the IEEE 802.11 MAC protocol is originally designed for single hop wireless networks, multimedia transport in WMNs has become a big challenge. In multi-hop wireless networks, throughput decreases significantly with the...
The mobile geographic information service involves the domain of mobile communication, mobile computing, geographic information service and other techniques. Ad Hoc networks are infrastructureless networks formed by neighboring equipments with limited life, and are now envisioned as cornerstones of future generation networking technologies (B3G and 4G). This paper researches on the integration of...
Wireless ad hoc and sensor networks have been becoming increasingly essential in recent years because of their ability to monitor and manage real-time situational information for various novel services. Therefore, we propose an adaptive intelligent home energy management system (AiHEMS) using a wireless ad-hoc and sensor network, which consists of a monitoring sensor and a management gateway. The...
Wireless Mesh Networks (WMNs) has been attracted significant attention due to achieve a wide-area wireless environment with flexible-configuration and low-cost properties. When WMNs is used as an infrastructure for Internet access, all network traffic from mesh routers will be forwarded to the gateways that are directly connected to the wired network. Communication in large-scale wireless networks...
In this paper, we study the challenging problem of optimizing gateway placement for throughput in Wireless Mesh Networks and propose a novel algorithm based on Particle Swarm Optimization (PSO) for it. By generating the locations of gateway randomly and independently, we calculate the fitness value of each scheme, and update them step by step with the best method to quickly find the optimal scheme...
Interoperation in MANETs is an important issue in many operational situations, because of the growing number of heterogeneous MANETs with different standards, technologies and adminstrative management. To enable interoperation, gateways are often deployed for protocol translation, inter-MANET routing, and management policy enforcement among these heterogeneous MANETs. To optimize gateway deployment,...
Emergency communication has been intensively investigated for solving suddenly-occurred events of public safety. Wireless network can play an important role of information acquisition and command decision-making in disaster areas, so a new Wireless Emergency Communication (WEC) algorithm is proposed in this paper. This algorithm possesses the characteristics of quick, stability, low energy and high...
Routing in adhoc networks is often solved through classical algorithms such as AODV, OLSR, … Several recent works have evaluated such algorithms and have investigated self-organization for reducing the number of messages in a dense and a mobile deployment. The main idea is to create and maintain locally a hierarchy that is well suitable for routing packets in an Adhoc network. The contribution of...
Wireless Mesh network (WMN) are dynamically self-organizing and self-configured, with the nodes in the network automatically establishing an ad-hoc network and maintaining the mesh connectivity. The ability to use multiple-radios and multiple channels can be cashed to increase aggregate throughput of wireless mesh network. Thus the efficient use of available interfaces and channels becomes the key...
Ad hoc networks have increasing come into use for emergency management both as aid to detect the occurrence of a disaster and as a means to communicate in the aftermath of one. The use of sensor networks, a category of ad hoc networks, for environmental sensing can allow planning well ahead of a disaster's occurrence. The authors propose a routing architecture for sensors used in emergency management...
An ad hoc network is a decentralized network that consists of mobile nodes with wireless communication devices without the aid of access points. A Vehicular Ad-hoc Networks (VANETs) is one of the representative application of ad hoc networks. Epidemic Routing has been proposed as a routing protocol based on Store-Carry-Forward mechanism for VANETs environment. However, in Epidemic Routing, network...
In mobile ad hoc networks, the security is the main constraint in message transmission. For secure group based message transmission, we must share the key among users so that we can make the transmission as secure. This paper addresses an interesting security problem in mobile ad hoc networks that is dynamic group key agreement for key establishment. For secure communication, a group key must be shared...
Managing communication in pervasive environments is a difficult challenge because of characteristics such as: no central server and frequent disconnections. Furthermore, services to be composed for coordination are sometimes distributed in multiple networks. In that case, intermediate nodes linking these networks have to route communication data toward appropriate destinations. However, incorporating...
The Internet of Things (IoT) is the paradigm of inter connecting heterogeneous devices which are distributed globally and will be a part of the future Internet. Wireless Sensor Networks (WSN) are one of the integral classes of networks in the IoT. One of the major challenges to achieve IoT is to integrate and manage large heterogeneous networks. Autonomic network management system is the need of the...
The wireless backbone of the WMN poses several constraints on the amount of traffic that can be transferred through the network. In this paper we present an investigation of the WMNs topology effect on the capacity of these networks. Three different topology types were considered: square, triangle, and hexagon. These topology configurations can be used as a starting point in the initial design of...
MANET (Mobile Ad Hoc Networks) is turning to be the recommended way to interconnect mobile nodes (MNs) to Internet when they move away from networks structures. The Mobile IP agents used to permit MNs IP mobility may announce their presence either using a proactive or a reactive discovery approach, but when MNs handover between different MANET sub-networks, ongoing communications may become interrupted...
Wireless Mesh Networks (WMNs) has recently gained popularities due to their fast and economical ways to access to the Internet. Because the WMNs are one of the few commonly implemented types of the ad hoc networks (MANETs), general MANET routing protocols can be used in the WMNs. it also is expected that a protocol that takes the particularities of the WMNs into account will outperform the general...
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