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In recent years, wireless sensor networks have become an emerging technology in industries, environment monitoring and health care monitoring systems and so on. However, sensor node is a resource-constrained device in terms of memory, bandwidth and energy. These constraints impose congestion in the network, leading to large number of packet drops, low throughput and significant wastage of energy because...
The availability of accurate location information (for airborne purposes) in unmanned aeronautical ad-hoc networks (UAANETs) makes it possible to deploy geographic routing mechanisms as the main communication protocol in such networks. However, the performance of geographic routing is not obvious, especially for sparse networks (i.e., networks with low connectivity levels). In this paper, the main...
This paper presented a fast fasten control algorithm (2FCA) in wireless sensor networks for information processing and transmitting. Using anycast technology, 2FCA can fast fasten broken routing path, which will decrease failure delay and increase packets' success rate. In the algorithm, it restricts participant nodes to save scarce energy and bandwidth resource, and then prolongs network's lifetime...
Lifetime is the most important concern in wireless sensor networks due to limited battery power of sensor nodes. In this paper, we focus on designing an energy-efficient and energy-aware routing algorithm, LLR, to increase the operational lifetime of multi-hop wireless sensor networks in the presence of unreliable communication links. Our proposed protocol utilizes a parameter, Broadcasting Delay,...
With new optical transport systems able to provide sub-wavelength granularity, the dynamic characteristics of the network are expected to strongly increase. Furthermore, such properties are highly related to the underlying physical network topology, which in turn require from the control plane important features such as scalability, dynamism and automatism. In this paper we analyze the properties...
Mobility protocols are originally proposed to support ongoing Internet connectivity of hosts or networks in motion. However, the requirement of seamless connectivity in mobile environment and use of route optimization between the communicating nodes have introduced several security vulnerabilities to mobility protocols. In this paper, we explain with illustrative examples major security threats on...
This paper proposes a simple path diversity algorithm (SPDA) for Interdomain routing. The SPDA uses source routing to find an alternate path from a source to a destination, and allows flexible division of traffic over the best and alternate path. The SPDA comprises three steps. First, the BGP protocol is extended to allow the BGP routing table to save the multiple paths for any destination. Second,...
Multiple Channel Design (MCD) has been adopted widely in wireless networks to increase throughput and reliability with relatively less energy consumption. Due to physical restrictions of sensor nodes, applying multiple radio channels in sensor networks poses significant challenges, particularly on energy consumption. To address such challenges, we propose an energy-aware MCD scheme called SmartChannel...
An autonomous decentralized system and a series of methods for reducing the detection time of path failures in the system are developed. Computing devices in the proposed system are organized into at least three groups based on their connectivity of system's graph model. Each computing device is assigned three identification values associated with their group memberships. The identification values...
This paper is a survey of new and improved recent position based routing methods in Mobile Ad-hoc Networks. The referenced materials agree on the main challenge in creating energy efficient mobile ad-hoc networks. The quest is to realize a simple, yet efficient means of routing and managing the Mobile Ad-hoc Network communications with existing technology. Although many protocols have been proposed,...
Wireless sensor network (WSN) is the network which is composed of a large number of intelligent sensor nodes, it has the ability of self-organizing network routing, therefore, it has been widely used. Building wireless sensor networks is the key to WSN nodes. This paper introduces the basic structure of wireless sensor network node based on ARM, and it delivers a detailed analysis on the operating...
Prolonged lifetime, improved coverage, and load balancing are important requirements in wireless sensor network applications. In this paper, we propose a new clustering protocol-adaptive clustering algorithm based on energy restriction (ACAER), which periodically selects cluster nodes according to their coverage rate and residual energy. ACAER has no assumptions about the distribution or density of...
Peer to peer networks are fast becoming the most popular file sharing media, guaranteeing complete user anonymity to the clients. However, modern P2P networks suffer from Sybil attacks, which forge multiple identities to influence the global decisions in the network. This paper suggests a novel solution to minimize Sybils influence using unique combination of Psychometric Tests, Color Tests &...
Admission control plays an important role in providing Quality of Service (QoS) guarantees for wireless mesh networks (WMNs). Multipath routing can improve network performance in reliability and load balancing. However, when the multipath routing are adopted in 802.11-based WMNs, the transmission with bandwidth assurance is facing rigorous challenges. In this paper, a novel joint design of multipath...
This paper evaluates the performance of an opportunistic scheduling scheme for a multiuser two-way relay network, wherein an analog network coding (ANC)-based relay assists the communication between multiple pairs of users. To ensure fairness for each user pair, we consider a scheduler based on maximizing the normalized minimum of the instantaneous signal-to-noise ratios (SNRs) at each user of the...
TCP does not perform well in networks with stochastic channels, with links that randomly drop packets or have long outages. Diversity routing has been proposed to improve TCP's performance in these networks. In diversity routing, a sublayer between TCP and the network replicates each transmitted packet and sends the multiple copies along parallel paths. As long as at least one of the copies reaches...
A Framework for Integrated Routing, Scheduling and Traffic Management (FIRST) in Ad Hoc Networks is introduced. Unicast and multicast routes are established in coordination with the scheduling of transmissions and bandwidth reservations in a way that bandwidth and delay guarantees can be enforced on a per-hop and end-to-end basis. Results from detailed simulation experiments show that, compared to...
Multi-hop broadcast routing is a critical component in ad-hoc wireless networks. Vehicular ad-hoc network (VANET) applications for example use broadcast communications extensively. Efficient broadcast protocols are required to enable these applications. Multi-hop broadcast algorithms can roughly be classified as either topological or statistical. Statistical protocols are well-suited to applications...
Wireless Body Sensor Networks (WBSNs) have recently gained a lot of research interests due to emerging new applications in health-care, sports and entertainment. As the design of effective network architectures is a key issue to achieve energy-efficient and low-latency communications between the on-body sensors, the 1-hop star and the 2-hop extended star architectures have recently been promoted by...
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