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Quality of Service supported multicast has attracted more attentions in the last few years and is regarded as an important communication mechanism for implementing real-time multimedia applications in Next Generation Internet. Considering the difficulty on exact measurement and complete expression of network parameters, an intelligent QoS multicast routing algorithm based on Mind Evolutionary Computation...
Frequent changes in topology and link quality in mobile ad-hoc networks (MANETs) present challenging problems in achieving optimal performance. We propose a self-learning routing protocol based on Q-learning that makes use of Quality of Service (QoS) parameters such as Signal to Interference plus Noise Ratio (SINR), delay and throughput, to make routing decisions. At the same time, a Bayesian Network...
In this paper, we proposed a kind of unicast routing suitable for deep space sensor networks, PEOPHR, on the basis of summarizing existing DTN unicast routing. This routing protocol utilizes a combination of copy and forward strategies. Its routing process consists three phrases: Bundle distribution based on copy strategy phase", "optimal path calculation based on WAOM routing selection...
In recent years, with the progress and development of human society, the needs of extraterrestrial energy exploration and solar living space development has become more and more urgent. Deep Space Sensor Network has a unique conditions and technical advantages in deep space exploration due to its characteristics of low power, low cost, distribution and self-organization. Multicast routing protocol...
Due to increased adoption of digital consumer services, Mobile Ad-hoc Networks (MANETs) are gaining importance in real-life business applications. MANETs are wireless networks consisting of a set of mobile nodes and enables multi-hop peer-to-peer routing without any requirement of predefined infrastructure for its deployment. There are several works in literature for improving the Quality of Service...
In smart metering systems, when the density of node is high or distance of communication range is large, the adjacent node number becomes large. If routing based on the number of hop from the sink node is used in such a network, the deviation of load will become large and it will shorten the network lifetime, also degrades other network performance. In this paper, we proposed the techniques solving...
Ensuring transportation network security is one of the most daunting challenges confronting homeland security agencies today. Significant research has been dedicated to model and analyze the vulnerability of transportation systems, yet notably fewer studies propose specific strategies for deploying defensive technologies to safeguard these systems. The ultimate goal of situational awareness for prevention...
Many denial-of-service (DOS) attacks in wireless networks, such as jamming, will cause significant performance degradation to the network and thus need to be detected quickly. This becomes more important in a cognitive wireless network employing dynamic spectrum access (DSA), where it is easier for the attackers to launch DOS attacks. For instance, the attackers may pretend to be a licensed primary...
Due to the progress of network multimedia technology, a majority of real-time multimedia applications need multicast communication to transmit information. These applications require a multicast routing protocol in which packets arrive to multicast receptors within a specified QOS guaranteed. D2V-RPS's problem (delay and delay variation RP Selection) consists in choosing an optimal multicast router...
An opportunistic contact between two mobile devices takes place when they are within communication range of each other. Typically, cyber-physical environments comprise a number of mobile devices that are likely to make opportunistic contacts in time and space. In the recent past, researchers have exploited opportunistic links mostly for routing and content sharing. However, less attention has been...
In wireless multi-hop networks, broadcasting by flooding generates frequent retransmissions of unnecessary packets that participate heavily in increasing contention and collision probability. These problems become increasingly likely in a wireless mesh network which can interface to other external networks, thus leading to a significant increase in broadcast traffic. In this paper we have focused...
ZigBee is a standard based on the IEEE 802.15.4 standard for wireless personal networks. Its use in Wireless Sensor Networks (WSNs) has aroused a great interest in the research community in the last years. In this paper, a synthetic study to analyze the performances and improve the routing protocols in WSNs is given and we were interested in routing mechanisms defined by the ZigBee standard. Multiple...
For Wireless Multimedia Sensor Networks (WMSN), how to increase the throughput in constrained environments has become the main challenge. Multipath routing is a promising solution because it can improve the channel utilization rate, reduce transmission delay and balance the transmission load. To pursue high efficiency for a multipath routing scheme, we need to take the characteristics of wireless...
To alleviate the growing concern of energy waste in networked devices, we propose an energy saving strategy in the ``server-centric" data center network. Focusing on servers, we introduce a basic scheme based on the transition of automata. By changing efficiently from sleeping state to active state in different network traffic, servers save the energy. This scheme is self-adaptive and simple...
In this paper, we present analytical study of routing overhead of reactive routing protocols for Wireless Multihop Networks (WMhNs). To accomplish the framework of generalized routing overhead, we choose Ad-Hoc on Demand Distance Vector (AODV), Dynamic Source Routing (DSR) and Dynamic MANET on Demand (DYMO). Considering basic themes of these protocols, we enhance the generalized network models by...
The wide deployment of smart phones has begun to make them pragmatic deployment environments for real-world at-scale MANETs (i.e., to provide peer-to-peer based non-cellular services). Such services, of course, will be subject to cyber-attacks, one of the simplest of which is radio frequency (RF) jamming. The success of these MANETs will require both: i) robust and accurate methods of detecting when...
Traditionally in routing approaches, each node allows a maximum load through the selected route. The existing routing approaches in cognitive radio networks (CRN) do not take into account spectrum trading as well as spectrum competition among licensed users (PUs). This paper introduces a novel routing algorithm that is based on spectrum trading and spectrum competition for cognitive radio networks...
The consistent performance, energy efficiency, and reliability are important factors for real-time monitoring of a patient's data, especially in a hospital environment. In this paper a routing protocol is proposed by considering the Quality of Service requirements of the body area network data packets. A mechanism for handling delay-sensitive packets is provided by this protocol. Extensive simulations...
Providing integrated network functionality in VHF tactical networks has been problematic for many years. Modern MANET routing techniques can swamp the limited bandwidth of ground-based tactical networks while legacy techniques are inefficient. In this paper, we expand on our previous work using a cross-layered approach and propose a new technique for Multicast Enhanced Opportunistic Routing (MEOR)...
Efficient data delivery in vehicular ad hoc networks (VANETs) is particularly challenging due to the unique characteristics of VANETs, such as fast topology change, frequent disruptions and rare contact opportunities. We observe through empirical study that a considerable amount of packets cannot be delivered within time-to-live (TTL). The wide use of third generation (3G) networks inspires us to...
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