A hybrid wireless network enhanced with multihopping for emergency communications

Fujiwara, Toru; Iida, Noboru; Watanabe, Takashi

doi:10.1109/icc.2004.1313335

Cited by 21 publications

(8 citation statements)

References 4 publications

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“…Fujiware et al [10] propose both a routing and MAC protocol for a multi-hop hybrid wireless network targeted for emergency communication. In [11] further protocols for hybrid networks are presented and discussed.…”

Section: Hybrid Wireless Networkmentioning

confidence: 99%

HyMN-injection-based multimedia content distribution in hybrid wireless networks

2008

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Infrastructured networks typically employ centralized approaches for group management and information provisioning. In contrast to that, in multi-hop ad hoc networks each node acts as a router as well as sender and receiver. In pure ad hoc networks, no Internet access is available. An additional challenge is to deal with mobility that causes network partitioning and re-organizations. Technically, these problems can be tackled by providing additional uplinks to a backbone network. Those can be used to access resources in the Internet as well as to inter-link multiple ad hoc network partitions, creating a hybrid wireless network. In this paper, we present HyMN, a prototypically implemented hybrid wireless network system optimized for multimedia content providing. Within the ad hoc network, adequate devices are elected to maintain uplinks to a backbone, which can provide for instance multimedia news from certain sports events like Football Championships, Olympic Games and alike. In order to efficiently manage the ad hoc communicating devices, a weighted clustering algorithm is employed.

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Section: Hybrid Wireless Networkmentioning

confidence: 99%

HyMN-injection-based multimedia content distribution in hybrid wireless networks

2008

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“…Fujiware et al [9] proposes a routing protocol and MAC protocol for a multi-hop hybrid wireless network in case of emergency communication. In [3] further protocols for hybrid networks are presented and discussed.…”

Section: Related Work 21 Hybrid Wireless Networkmentioning

confidence: 99%

Multimedia content distribution in hybrid wireless networks using weighted clustering

Andronache

Brust

Rothkugel

2006

Proceedings of the 2nd ACM International Workshop on Wireless Multimedia Networking and Performance Modeling

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Fixed infrastructured networks naturally support centralized approaches for group management and information provisioning. Contrary to infrastructured networks, in multi-hop ad-hoc networks each node acts as a router as well as sender and receiver. Some applications, however, requires hierarchical arrangements that-for practical reasons-has to be done locally and selforganized. An additional challenge is to deal with mobility that causes permanent network partitioning and re-organizations. Technically, these problems can be tackled by providing additional uplinks to a backbone network, which can be used to access resources in the Internet as well as to inter-link multiple ad-hoc network partitions, creating a hybrid wireless network. In this paper, we present a prototypically implemented hybrid wireless network system optimized for multimedia content distribution. To efficiently manage the ad-hoc communicating devices a weighted clustering algorithm is introduced. The proposed localized algorithm deals with mobility, but does not require geographical information or distances.

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“…It is then very likely that both worlds will merge into what is referred to as hybrid networks. A major benefit of using some infrastructure is that network partitioning becomes then avoidable [12], [13] [14]. Unfortunately accessing the network infrastructure generally has a significant cost.…”

Section: The Problemmentioning

confidence: 99%

Coevolutionary genetic algorithms for Ad hoc injection networks design optimization

Danoy

Bouvry

Hogie

2007

2007 IEEE Congress on Evolutionary Computation

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Abstract-When considering realistic mobility patterns, nodes in mobile ad hoc networks move in such a way that the networks most often get divided in a set of disjoint partitions. This presence of partitions is an obstacle to communication within these networks. Ad hoc networks are generally based on technologies allowing nodes in a geographical neighborhood to communicate for free, in a P2P manner. These technologies include IEEE802.11 (Wi-Fi), Bluetooth, etc. In most cases a communication infrastructure is available. It can be a set of access point as well as GMS/UMTS network. The use of such an infrastructure is billed, but it permits distant nodes to get in communication, through what we call "bypass links". The objective of our work is to improve the network connectivity by defining a set of long distance connections. To do this we consider the number of bypass links, as well as the two properties that build on the "small-world" graph theory: the clustering coefficient, and the characteristic path length. A fitness function, used for genetic optimization, is processed out of these three metrics. In this paper we investigate the use of two Coevolutionary Genetic Algorithms (LCGA and CCGA) and compare their performance to a generational and a steadystate genetic algorithm (genGA and ssGA) for optimizing one instance of this topology control problem and present evidence of their capacity to solve it.

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A hybrid wireless network enhanced with multihopping for emergency communications

Cited by 21 publications

References 4 publications

HyMN-injection-based multimedia content distribution in hybrid wireless networks

HyMN-injection-based multimedia content distribution in hybrid wireless networks

Multimedia content distribution in hybrid wireless networks using weighted clustering

Coevolutionary genetic algorithms for Ad hoc injection networks design optimization

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