Application-aware protection in DWDM optical networks

Shared Path Protection in DWDM Mesh Networks

Failure of even a single fiber link in DWDM mesh networks can cause severe data and revenue loss due to failure of several lightpaths of high bandwidth. This paper investigates this problem using shared path protection technique. First, we propose a link disjoint path finding heuristic, Multiple Active Path Search (MAPS) and show that it works even under trap topologies where conventional algor...

Advanced Optical Networks: DWDM Advanced Optical Networks: DWDM DENSE WAVELENGTH DIVISION MULTIPLEXING

A Novel Protection Guaranteed, Quality of Transmission Aware Routing and Wavelength Assignment Algorithm for All-optical Networks

Transparent All Optical Networks carry huge traffic and any link failure can cause the loss of gigabits of data; hence protection and its guarantee becomes necessary at the time of failure. Many protection schemes were presented in the literature, but none of them speaks about protection guarantee. Also, in all optical networks, due to absence of  regeneration capabilities, the physical layer i...

Switched DWDM Ethernet Passive Optical Networks

The IEEE Ethernet Passive Optical Networks (EPON) standard is a leading Time Division Multiplex (TDM) standard for PONs. The paper investigates the operation of an EPON based system in a Dense Wavelength Division Multiplex (DWDM) environment. It extends the concept of a multi-wavelength system from being merely a stack of independent PONs to that of a stack of a switched set of PONs. The functi...

Protection and Restoration in DWDM Networks: Recent Developments and Issues

Protection using rings has been the common method of reducing downtime on SONET/SDH based telecommunication networks. With the trend towards IP over DWDM, there is a need for IP based protection and restoration mechanisms. In this paper, the mechanisms being developed at several standards organizations including OIF, IETF, and ITU are described. These mechanisms are in some sense more powerful ...