Yukio Nakano, Ph.D.
Global Support Dept., Carrier Network Systems Div., Hitachi Communication Technologies, Ltd.
Masatoshi Takihiro
Access Equipment Development Dept., Carrier Network System Div., Hitachi Communication Technologies, Ltd.
Yasuyuki Fukashiro
Network Equipment Dept., Carrier Network Systems Div., Hitachi Communication Technologies, Ltd.
Masahiko Mizutani, Ph.D.
Access Equipment Development Dept., Carrier Network Systems Div., Hitachi Communication Technologies, Ltd.
With the advent of full fledged NGNs where data, voice, and video are all IP based, it is necessary for the provision of stable services to provide metro access systems and optical transport systems that allow paths to be operated and maintained over packet networks. In order to achieve such highly managed IP networks, the end-to-end QoS is guaranteed by managing IP network resources using Transport-MPLS in a centralized manner and by allocating fixed routes and resources for the packet transfer function. The optical transport systems use ROADMs to set up wavelength paths between IP nodes flexibly to achieve path quality management and high path reliability.
Global Support Department, Carrier Network Systems Division,
Hitachi Communication Technologies, Ltd.
MPLS, ROADM, GPON, Optical, Transmission
