The multi-services transport and switch, protocol elements, topologies, transmission framework, structure of system architecture and generic frame format of MSR were studied by means of resilient packet ring (RPR) and its multi-services transport according to carrier-class demands for multiple services of optical metropolitan area networks.

According to demanding for multiple services of optical metropolitan area networks.

For the first time, the optical exchange network-based on the variable wavelength laser is put forward.

Planing and practice of "SHEN DA" metropolitan area optical network information and automatic check-up measure system;

Operation pattern and management of metropolitan area optical network;

On the basis of describing ASON architecture, this paper discusses the key technology of metropolitan area optical network and the solution of applying ASON to metropolitan area optical network.

This paper gives a comprehensive introduction to the development background,the definition,the technological project and characteristics of MON.

This paper introduces the concept of metro optical network,then analyze the characteristics of metro optical network,gives the basic principle and consideration of constructing MON,at last ,point MSTP is the best solution for constructing MON at present .

Analysis of development route of metro optical network;

This paper introduce the application of SDH_based MSTP in the metro optical networks,then it mainly discuss the implementation,application and problem of the ethernet service over SDH_based MSTP.