Routing in Degree-Constrained FSO Mesh Networks

Hu, Ziping; Verma, Pramode K.; Sluss, James J.

doi:10.1109/fgcn.2008.31

Cited by 7 publications

(2 citation statements)

References 12 publications

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“…Hu et al have discussed the least cost path (LCP) routing algorithm, which is based on reducing the end‐to‐end delay. For routing the traffic from source to destination, they proposed minimum hop count with load‐balancing (MHLB) routing algorithm, which is based on the number of hops.…”

Section: Related Workmentioning

confidence: 99%

Reconfigurable routing protocol with optical sphere in FSO MANET

Balamurugan¹,

Chitra

Jawahar

2018

Concurrency and Computation

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Summary In Free Space Optic Mobile Ad hoc Networks (FSO MANET), during data transmission through hierarchical routing protocol, the route failure may either occur if the node has expired due to energy drain or if the node is not positioned with the succeeding hop node owing to mobility. To circumvent these obstacles, in this work, a cross layered reconfigurable protocol for routing with multiple transceivers called as optical sphere in FSO MANET is developed in NS‐2. In this protocol, the nodes are clustered, and the cluster head is selected using network source connector. If any of the cluster member expire due to energy drain and if the alternate path is not available in the routing table, then the source will perform route reconfiguration to change the orientation and transmission radius of the node resulting in direct transmission of packet to cluster head. During data transmission through re‐configured route, if the node interface is positioned with respect to the succeeding hop node, then the packet can be delivered. Otherwise, per‐flow buffer algorithm is used for re alignment. Results simulated show that the proposed protocol surpasses the existing works in terms of delay, delivery ratio, and residual energy.

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Section: Related Workmentioning

confidence: 99%

Reconfigurable routing protocol with optical sphere in FSO MANET

Balamurugan¹,

Chitra

Jawahar

2018

Concurrency and Computation

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“…Autonomous reconfiguration, protection strategies, and fault avoidance of FSO networks are studied in [51,52,53,54]. The routing problem in degree constrained FSO WMNs is addressed in [55]. Topology control of FSO networks is studied in [56].…”

Section: Literature Reviewmentioning

confidence: 99%

Hybrid Free Space Optical and RF Wireless Communication

Tang¹

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Hybrid free space optical/radio frequency (FSO/RF) technology has recently been proposed as a means of significantly increasing the throughput and reliability of wireless broadband communications. The motivation is to use parallel noninterfering communication channels to combat channel impairments. In order to implement and fully exploit hybrid FSO/RF technology, both point-to-point (P2P) communication system and network models need to be studied. We develop physical-layer and network-layer models of hybrid FSO/RF networks. We address two topics: hybrid FSO/RF P2P systems and hybrid FSO/RF wireless mesh networks (WMN). Theoretical analyses are presented. In addition, we present practical implementations with performance that approaches the theoretical system performance derived. Numerical and simulation results are provided to show the advantages of hybrid FSO/RF systems. For P2P communications, we model the hybrid FSO/RF system as an independent parallel channel system. We develop an information-theoretic analysis of the parallel channel model and implement an adaptive design resulting in a capacity-approaching and seamless joint system. Results show that this jointly optimized FSO/RF link significantly outperforms simple RF or FSO links. In our research on hybrid FSO/RF WMN, we study both centralized and distributed routing algorithms. For centralized routing, we present network control algorithms based on both non-fading and fading communication channels using a physical interference model for the RF portion of the network. We study the throughput improvement achievable by augmenting the RF WMN with FSO links. In our distributed routing study, a hierarchical routing algorithm is developed for the hybrid FSO/RF network. The algorithm is optimized for the hybrid network so that the advantages of high-throughput FSO links and the reliability of RF links are highlighted. iii I gratefully appreciate the National Science Foundation for funding this research (under grant number ECCS-0636598). Finally, I want to thank to my wife and parents for their support. Without their help, this dissertation would not have been possible.

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