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This paper focuses on studying the performance of TPGF geographic routing algorithm with multi routing metric called McTPGF in random duty-cycled wireless multimedia sensor networks (WMSNs). The multi-metric contains the geographic distance and the time, which is called sleeping-delay in this paper, the forwarding node waits to forward packet to the neighbor node after it wakes up. We recognize the...
To restore the performance of the system due to the failure of a BS, we propose a hybrid vehicular communication system which introduces a novel double cluster head (DCH) routing scheme. Using vehicular traces from loop Ids on the M4 motorway in the UK, the performance of the system is evaluated and compared with the single cluster head (SCH) routing scheme under different configurations. Even though,...
This article addresses the problem of performance degradation of wireless sensor networks for scenarios involving data gathering to a small number of node sinks; as the data travel toward a sink, its neighbor nodes experience high loads and congestion. Using CSMA/CA as the basic access protocol, we implemented CoSenS, a collecting and sending burst scheme, on the top of it to address these issues...
The message deliveries based on the store-carry-forward routing schemes, such as epidemic spraying, Message Ferrying and so on, are one of the fundamental and useful methods for establishing communications under Delay/Disruption/Disconnect Tolerant Networking (DTN) environments. However, these methods for message deliveries commonly have their own limitations in reach ability of message to destinations...
Power Line Communication Networks (PLCN) represent a very attractive communication system which can be used for many applications in the area of both home/building automation and street lighting control. The main problem is how to organize the many nodes, in order to implement a network where all nodes can exchange information with a master node. In this paper a tree-based clustering approach is introduced...
Delay tolerant networks (DTNs) are a special type of wireless mobile networks which may lack continuous network connectivity. Multicast is an important routing function that supports the distribution of data to a group of users, a service needed for many potential DTNs applications. While multicasting in the Internet and mobile ad hoc networks has been studied extensively, efficient multicasting in...
We study the problem of multihop routing in vehicular ad hoc networks (VANET). IEEE 802.11p and other vehicular network standards advocate vehicles to issue periodic broadcast messages at regular intervals called beacons. Beacons include among other information geographic coordinates of the vehicle, heading, speed, etc. Thus, most VANET routing solutions in the literature use those beacons to know...
Geocasting is a routing method for ad hoc wireless networks that uses geographic information to multicast to nodes within the geocast region. The multicast members cannot receive multicast data continuously when they move outside the geocast region. Therefore, a geocast-based multicast method for continuous information delivery in MANET environments was developed. The method combines geocasting and...
We present a new scheme to reduce the end-to-end routing delay in the mission-critical applications of the wireless sensor networks (WSNs) under the duty cycle model. While greedy routing in the synchronized MAC model has been studied extensively, efficient routing in an asynchronous MAC model is considerably different because the wake-up time and availability of a node along the pre-decided path...
This Paper deeply analyzes and studies the existing problems in the any cast communication models in an IPv6 network and proposes a k-Any cast routing schemes for IPv6 network which are fault tolerance, load balancing, security, and improvement in system performance. In addition, this paper proposes a concrete scheme on how to implement this k-Any cast communication model in an IPv6 network which...
In wireless networks, conditions may change rapidly and unpredictably. Often wireless networks are not designed to adapt to these changing conditions and perform poorly when they become congested. The multi-hop broadcast nature of wireless mesh networks amplifies the problem of poor wireless performance. Mixed bias scheduling has previously been applied successfully to wireless mesh networks however,...
Much work has been done on routing in Ad-Hoc networks, but the proposed routing solutions only deal with the best effort data traffic. Connections with Quality of Service (QoS) requirements, such as voice channels with delay and bandwidth constraints, are not supported. The QoS routing has been receiving increasingly intensive attention, but searching for the shortest path with many metrics is an...
The paper presents the effect of packet size on the delay in Manhattan Street Network (MSN). The delay behavior of Manhattan Street Network for packets of different size is demonstrated. The results are produced in the NS2 simulator. It is concluded that the increase in the packet size increases delay and as a result degrades the performance in multipath, multihop networks like MSN .The performance...
An energy-balanced multicast routing algorithm EBMR in wireless sensor networks (WSNs) is proposed. The objective of EMBR algorithm is to improve the energy efficiency and extend the network lifetime in multicast. To achieve this goal, the energy consumption model in WSNs is analyzed and an energy-constrained metric for multicast forwarder selecting is studied. Then the framework of EBMR algorithm...
To improve the adaptability and stability of Dijkstra algorithm for solving routing problem of service composition, a method to solve routing problem of service composition based on an improved ant colony algorithm is proposed. Firstly, based on the traditional ant colony algorithm, the constraints of it are improved. Secondly, a problem solving model for improved ant colony algorithm is established,...
With the development of network, users'services put forward diverse demands on the network QoS (Quality of Service), the QoS routing is the optimization problem under the satisfaction of multiple QoS constraints. This paper firstly sets up a multi-constrained QoS routing model and constructs the fitness value function by transforming the QoS constraints with a penalty function. Secondly, we merge...
One or more mobile nodes with mobile router(s) form a mobile network. Mobile router acts as the single point of attachment to the internet. As the configuration of mobile network changes, mobile router keeps track of its registered mobile nodes. Presently, a scheme has been designed for group registration of mobile nodes under a single home agent. In this paper, a communication scheme is proposed...
In multi-hop wireless mesh network (WMN), hidden node is one of the major problems when IEEE 802.11 DCF is used as a MAC protocol. It causes data packet collisions between the multi-hop links and significantly affects the network performance. In order to avoid this problem, a novel routing scheme is proposed in this paper. It uses a high sensitive sensing function utilized for cognitive radio. The...
Internet exchange points (IXPs) are an upcoming and essential component of the Internet infrastructure exhibiting numerous effects on various aspects of Internet topology and packet routing. While IXPs have been shown to play a major role in the evolution of the Internet topology, there has been little prior work in determining their effect on packet routing across the Internet. This paper presents...
The emerging high definition in-home multimedia applications require higher capacity from future wireless networks in the indoor environments. In this paper, we consider a novel mesh-like architecture for indoor wireless networks using 60 GHz radio for supporting multimedia applications with sufficient data rate and stringent quality-of-service (QoS) guarantees. We concentrate on studying the application...
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