Fujitsu Corporation

Takafumi Chujo

Ching-Fong Su

Kaoru Chujo

Jingsha He

Takeo Hamada

Hung-ying Tyan

Xiangying Yang

Antonio Magnaghi

Network traffic may be estimated using samples of network activities to identify traffic parameters. A model of the network may be generated using the traffic parameters, and the model can be used to simulate the network using a modified set of parameters. Network traffic may be managed using the results of the simulation. Network traffic can also be managed by intercepting and modifying a control message on a peer-to-peer network.

Estimating and managing network traffic

A system includes a communication network having any number of separately addressable elements. An analysis device can test packet data paths between these elements by eliciting particular traffic patterns. For example, the analysis device may elicit similar traffic patterns in both forward and reverse communications with a remote element and analyze these communications to detect network misconfigurations.

Detection of network misconfigurations

A method and apparatus for selecting failure protection paths in a WDM network. The method exploits wavelength reservation sharing potentials presented by non-concurrent failure events on a plurality of links sharing a link in a protection path. Light-weight aggregated link metrics termed 'buckets' are used to track wavelength reservations for protection paths on individual links in the network. These buckets are then used to construct protection paths with minimized wavelength consumption. The method is employed on individual networking devices in a distributed manner or is used by a centralized network management system to allocate protection paths.

Online distributed path routing method and system

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Cupertino, CA, United States of America

Takafumi Chujo