This paper investigates the prospects and challenges of hierarchical optical path networks.
The merits and issues of introducing higher order optical paths are elucidated. State of the …

The transport network paradigm is moving toward next-generation networks that aim at IP
convergence, while architectures and technologies are diversifying. Video technologies …

We propose a hierarchical optical path network design algorithm. In order to efficiently
accommodate wavelength paths in each waveband path, we define a source-destination …

This paper presents recent progress made in the development of an optical packet and
circuit integrated network. From the viewpoint of end users, this is a single network that …

As users require ever more speed, variety and personalization in ICT services, the capacity
and versatility of access networks needs to be expanded. The first generation of point-to …

A new hierarchical optical path network design algorithm that incorporates restrictions on
waveband add/drop ratios at nodes is proposed. We evaluate its effectiveness by …

Detecting degraded optical signal quality solely at the terminal nodes of monitoring trails is a
promising approach for reducing the fault management cost in all-optical mesh networks …

This paper proposes a hierarchical optical path network design algorithm employing
dedicated protection in the waveband layer. The proposed algorithm reduces network costs …

In this paper, we propose a novel network design algorithm that yields the hierarchical
optical path network with dedicated wavelength path protection. A hierarchical optical path …

We develop and analyze a new waveband multi/demultiplexer that exploits the routing
functions of arrayed-waveguide gratings (AWG). The device can accommodate multiple …