O'Reilly logo

Broadband Optical Access Networks by Shing-Wa Wong, David Gutierrez, Wei-Tao Shaw, Ning Cheng, Leonid G. Kazovsky

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

CHAPTER 4

NEXT-GENERATION BROADBAND OPTICAL ACCESS NETWORKS

In Chapters 1 to 3 we presented an overview of several broadband access technologies, the basic components and systems that are used in optical communications, and the current network architectures and protocols for time-division multiplexed passive optical networks (TDM-PONs), including BPON, GPON, EPON, and 10GEPON.

In this chapter we present and discuss further development of passive optical networks. We start by taking a look at the evolution paths currently envisioned for TDM-PON networks, mostly in terms of bandwidth increase and reach extension. Then we discuss wavelength-division multiplexed passive optical network (WDM-PON) components and network architectures that have been developed in research laboratories and have been used in a few trial deployments around the world. These WDM-PONs can provide much higher bandwidths to customers by making use of many wavelengths, in contrast to TDM-PONs, which have just one wavelength for data transmission in each direction (downstream and upstream).

We then present an overview of research hybrid TDM/WDM-PON network architectures. These network architectures allow for a progressive evolution from TDM-PON to WDM-PON. By the time WDM-PON network start being deployed, a considerable number of TDM-PON deployments will be in place. Thus, WDM-PON networks would ideally make use of the outside plant deployed for TDM-PONs, minimizing the changes to this plant and disturbing the ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required