Sunday, March 11, 2012

OKI Develops Adaptive GE-PON + 10 GE-PON System

OKI announced an adaptive network configuration technology for channel-switching between current GE-PON systems and next generation 10 GE-PON systems. The goal is a flexible, low-cost optical access system for subscription-based 100-km broadband optical networks.

OKI said its adaptive networking builds network infrastructure in a ring or cascade form by using centralized control node and passive OHF for the PON system, which was conventionally branched by power splitters. This enables broadband technology with lowed loss resulting from branching. Centralized control nodes switch WDM and OCDM channel allocating, realizing virtual technology in a logical star form without depending on physical connection of OLT and ONU.

This experiment demonstrates the transmission of WDM and OCDM hybrid optical signals, restoration via passive routing, and service provisioning from GE-PON to 10G-EPON without obstacles to other users.

Moving forward, OKI will continue to develop multi-channel control and OLT driving control technologies to offer more efficiency and build virtualized access system technology by combining this adaptive networking technology for an early practical realization for virtual PON system.

"The adaptive network configuration technology developed by OKI combines OKI's unique optical hybrid filtering (OHF3) and adaptive networking technologies for flexible connections between OLT and ONU," says Takeshi Kamijoh, General Manager of Research and Development Center at OKI. "In addition to wavelength-division multiplexing (WDM) used for metro-core networks, OHF realizes multiple expansion technology that enables 'add/drop' from 160ch multiple signals by adding optical code division multiplexing (OCDM) technology, achieving filters with low transmission loss."