Establishment of Networking Technologies for Meta Information Environment

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1: Ad-hoc networks for the meta-in formation environment1-1 : Routing which maximizes the network connectivity (Makoto Imase, Harumasa Tada)We proposed routing algorithms to maximize the network connectivity taking into account unidirectional links and to support various type of communication, taking inspiration from the foraging behavior of ants, and showed that the adaptability and robustness of our proposals outperformed the existing protocols.1-2 : Congestion control mechanisms for mobile ad-hoc network environment (Go Hasegawa)We developed an inline network measurement method, which utilizes data and acknowledgement packets of an active TCP connection for packet interval-based bandwidth measurement of a network path. We then proposed a novel congestion control mechanisms on the inline measurement method. In addition, we introduced a new transport-layer service, which is the background transfer service, which is also based on the proposed measurement technique.1-3 Information manag … More ement mechanism for ad hoc networks (Masaki Aida)To improve scalability and tolerance against changes of network topology in sensor networks, we proposed a new node placement algorithm and verified its performance in saving energy consumption. Also, we showed that a combination of the algorithm and an aggregation routing improves the tolerance of networks. In addition, we proposed a new stability analysis of systems that takes user behaviors into consideration.-2 : Sensor networks for the meta-information environment 2-1 : Energy-efficient routing (Masayuki Murata)2-1: Energy-efficient routing (Masayuki Murata)We proposed a communication mechanism which autonomously generated energy-efficient communication patterns by adopting the traveling-wave phenomena in the pulse-coupled oscillator model and showed its effectiveness through simulation and practical experiments.2-2: Data gathering (Naoki Wakamiya)We proposed a control scheme which gathered sensor information in an energy-efficient way under usual conditions and transmitted urgent information in a fast and reliable way under emergent conditions and showed its effectiveness through simulation and practical experiments. Less