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Article
A Robust Deafness-Free MAC Protocol for Directional Antennas in Ad Hoc Networks
Directional antennas provide many benefits such as high gain and increased transmission range in wireless networks. However, the deafness problem in directional antennas can greatly decrease transmission effic...
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Article
A Low-Interference Channel Status Prediction Algorithm for Instantaneous Spectrum Access in Cognitive Radio Networks
Various channel status prediction algorithms in cognitive radio networks have been proposed to predict channel availability. However, the existing algorithms predict imperfectly and may cause interference to i...
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Article
A Highly Successful Frame Contention Strategy for Self-Coexistence in IEEE 802.22 Wireless Regional Area Networks
As the first standard for cognitive radio networks, IEEE 802.22 wireless regional area networks (WRANs) exploit television white spaces. Secondary networks have to preserve primary network communications and ...
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Article
Equal-Size Clustering for Irregularly Deployed Wireless Sensor Networks
This study examines the problem that sensors are irregularly deployed in a wireless sensor network (WSN). Such irregularity makes clustering protocols less efficient. This paper proposes a new clustering algor...
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Article
A Novel Multi-channel MAC Protocol for Directional Antennas in Ad Hoc Networks
In recent years, the employment of directional antennas in ad hoc networks has increased significantly. In this paper, we propose a multi-channel MAC protocol for directional antennas (MCMDA) for IEEE 802.11 base...
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Article
Qualitative and Quantitative Comparison of IEEE 802.15.3c and IEEE 802.11ad for Multi-Gbps Local Communications
Both IEEE 802.15.3c and IEEE 802.11ad standards define physical and medium access control layers for operation in the 60 GHz millimeter wave frequency band that is capable of multi-Gbps throughput. As both sta...
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Article
Transmission Power Control Aware Routing in Cognitive Radio Ad Hoc Networks
Abstract—Cognitive radio technology has drawn much attention since it is a promising candidate to efficiently utilize the scarce radio resources. However, cognitive radio introduces new challenges in the proto...
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Article
Open AccessOn-demand routing protocols for cognitive radio ad hoc networks
Cognitive radio ad hoc networks (CRAHNs) are a class of cognitive radio networks. In recent years, they have gained popularity, and routing protocols have been proposed. Above all, the protocols based on on-deman...
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Article
Open AccessA concurrent access MAC protocol for cognitive radio ad hoc networks without common control channel
Cognitive radio ad hoc networks (CRAHNs) consist of autonomous nodes that operate in ad hoc mode and aim at efficient utilization of spectrum resources. Usually, the cognitive nodes in a CRAHN exploit a number...
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Chapter and Conference Paper
Are Heterogeneous Cellular Networks Superior to Homogeneous Ones?
In this paper, the performance of homogeneous cellular networks (HMCNs) and heterogeneous cellular networks (HTCNs) is evaluated and compared. The HTCN discussed in this paper consists of three kinds of cells:...
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Article
Adaptive multicast on mobile ad hoc networks using tree-based meshes with variable density of redundant paths
Multicasting has been extensively studied for mobile ad hoc networks (MANETs) because it is fundamental to many ad hoc network applications requiring close collaboration of multiple nodes in a group. A general...
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Chapter and Conference Paper
Adaptive Multicast Trees on Static Ad Hoc Networks: Tradeoffs Between Delay and Energy Consumption
This paper proposes adaptive multicast trees (AMTs) on static ad hoc networks. The proposed function f: (α,β), → AMT(α,β) provides a wide range of tradeoffs between the most energy efficient AMT and the fastest A...
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Chapter and Conference Paper
Tree-Based Multicast Meshes with Variable Density of Redundant Paths on Mobile Ad Hoc Networks
This paper proposes an adaptive multicast scheme for mobile ad hoc networks, called tree-based mesh with k-hop redundant paths (TBM k ), in which path re...
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Chapter and Conference Paper
Robust Multipath Routing to Exploit Maximally Disjoint Paths for Wireless Ad Hoc Networks
This paper proposes a new multipath routing protocol called maximally disjoint multipath AODV (MDAODV), which exploits maximally node- and link-disjoint paths. The key idea is to extend the route request (RREQ) m...
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Chapter and Conference Paper
Energy Consumption in Multicast Protocols for Static Ad Hoc Networks
In static ad hoc networks, energy performance is as important as general performance since it directly affects the network operation time in the wireless environment. This paper evaluates the multicast protocols ...
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Chapter and Conference Paper
Approaches to Using a Wireless Mobile Terminal to Help Severely Hearing Impaired People
In this paper, new technology-adaptive approaches to using a wireless mobile terminal are presented in order to help severely hearing impaired people, which are remote human translation, remote server translat...
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Chapter and Conference Paper
Design and Experiment of a Communication-Aware Parallel Quicksort with Weighted Partition of Processors
In most parallel algorithms, inter-processor communication cost is much more than computing cost within a processor. So, it is very important to reduce the amount of inter-processor communication. This paper pres...
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Chapter and Conference Paper
Design and Evaluation of a Cache Coherence Adapter for the SMP Nodes Interconnected via Xcent-Net
This paper presents the design and evaluation of a cache coherence adapter for the cache-coherent non-uniform memory access multiprocessor system in which symmetric multiprocessor (SMP) nodes are interconnecte...
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Chapter and Conference Paper
KinCA: An InfiniBand Host Channel Adapter Based on Dual Processor Cores
InfiniBand technology is being accepted as the future system interconnect to serve as the high-end enterprise fabric for cluster computing. This paper presents the design and implementation of an InfiniBand ho...
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Chapter and Conference Paper
A Fast Tree-Based Barrier Synchronization on Switch-Based Irregular Networks
In this paper, we propose a Barrier Tree for Irregular Networks (BTIN) and a barrier synchronization scheme using BTIN for switch-based cluster systems. The synchronization latency of the proposed BTIN scheme is ...
