Proceedings ArticleDOI
A novel layered graph model for topology formation and routing in dynamic spectrum access networks
Chungshen Xin,Bo Xie,Chien-Chung Shen +2 more
- pp 308-317
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TLDR
A novel layered graph is proposed to model the temporarily available spectrum bands, called spectrum opportunities (SOPs), and this layered graph model is used to develop effective and efficient routing and interface assignment algorithms to form near-optimal topologies for DSA networks.Abstract:
This paper studies a fundamental problem in dynamic spectrum access (DSA) networks: given a set of detected spectrum bands that can be temporarily used by each node in a DSA network, how to form a topology by selecting spectrum bands for each radio interface of each node, called topology formation in this paper. We propose a novel layered graph to model the temporarily available spectrum bands, called spectrum opportunities (SOPs) in this paper, and use this layered graph model to develop effective and efficient routing and interface assignment algorithms to form near-optimal topologies for DSA networks. We have evaluated the performance of our layered graph approach and compared it to a sequential interface assignment algorithm. The numerical results show that the layered graph approach significantly outperforms the sequential interface assignmentread more
Citations
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Journal ArticleDOI
NeXt generation/dynamic spectrum access/cognitive radio wireless networks: a survey
TL;DR: The novel functionalities and current research challenges of the xG networks are explained in detail, and a brief overview of the cognitive radio technology is provided and the xg network architecture is introduced.
Journal ArticleDOI
Advances in cognitive radio networks: A survey
Beibei Wang,K.J.R. Liu +1 more
TL;DR: Recent advances in research related to cognitive radios are surveyed, including the fundamentals of cognitive radio technology, architecture of a cognitive radio network and its applications, and important issues in dynamic spectrum allocation and sharing are investigated in detail.
Journal ArticleDOI
Cognitive radio sensor networks
TL;DR: In this article the main design principles, potential advantages, application areas, and network architectures of CRSNs are introduced and the existing communication protocols and algorithms devised for cognitive radio networks and WSNs are discussed along with the open research avenues for the realization of C RSNs.
Proceedings ArticleDOI
DIMSUMnet: new directions in wireless networking using coordinated dynamic spectrum
TL;DR: It is argued that a simpler pragmatic approach that offers coordinated, spatially aggregated spectrum access via a regional spectrum broker is more attractive in the immediate future.
Journal ArticleDOI
Routing in cognitive radio networks: Challenges and solutions
TL;DR: This work provides an extensive overview of the research in the field of routing for CRNs, clearly differentiating two main categories: approaches based on a full spectrum knowledge, and approaches that consider only local spectrum knowledge obtained via distributed procedures and protocols.
References
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Optimized Link State Routing Protocol (OLSR)
Thomas Clausen,Philippe Jacquet +1 more
TL;DR: The Optimized Link State Routing protocol is an optimization of the classical link state algorithm tailored to the requirements of a mobile wireless LAN and provides optimal routes (in terms of number of hops).
Proceedings ArticleDOI
Routing in multi-radio, multi-hop wireless mesh networks
TL;DR: A new metric for routing in multi-radio, multi-hop wireless networks with stationary nodes called Weighted Cumulative ETT (WCETT) significantly outperforms previously-proposed routing metrics by making judicious use of the second radio.
Optimized Link State Routing Protocol
TL;DR: Urethane prepolymer compositions are made from 1- isocyanato-3-isocyanatomethyl-3,5,5-trimethyl cyclohexane and polyols at a total NCO to OH ratio of at least 1.2:1, and the prepolymers are reacted with cycloaliphatic polyamines to give urea-urethanes.