Greening the PON network

FiberHome Technologies
17 Dec 2012

Sponsored article

All information and communication technology (ICT) related activities contribute to an estimated 10% of global carbon footprint today. With that, we are witnessing a growing, conscientious effort to develop energy-efficient “green” communication network architectures and methods.

However, the explosive growth in bandwidth, storage, and processing demands is expected to continuously increase the energy that ICT infrastructure consumes. Significant efforts and progresses have already been made to meet the green communication challenge based on actual traffic demand.

FiberHome has cooperated with some partners in research and has investigated several areas of energy efficiency. We have found that in the life cycle of telecommunications products, the operational phase consumes the most energy.

This stage accounts for about 80% of total energy consumption during a whole life cycle. During the operational phase, fixed access networks account for the largest energy demand. In different operating environments, energy consumption as a proportion of the access network ranges from 50% to 70%.

FiberHome recommends the following steps for operators to effectively realize energy-conservation in PON network:

  • The technology should be sustainable, driving a network update smoothly but also protect the existing investment;
  • The network should fully enhance the ability of the PON system hardware and software in order to reduce the resources that reach unit index occupies; and
  • The PON system should be automated and made smart as much as possible. This can reduce the output of the human cost during the operation and maintenance phases.

Energy conservation through a unified platform

With the continuous increase in bandwidth demand pushing the need for higher capacity access architecture, one of the principal requirements for next-generation PON (NGPON) is to provide a substantial increase of the bandwidth available to end-subscribers.

At NGPON deployment, carriers need to update the existing network smoothly to protect existing investments. FiberHome can help unify the different PON technology (GPON/10G GPON) platforms and minimize the number of network aggregation nodes. Thus, the PON systems can use centralized power supply to significantly reduce the energy consumption of the access network equipment.

Figure-1 FiberHome GPON&10 GPON smooth upgrade

In the 10G GPON&GPON unified system, the ODN in 10G GPON entirely inherits that of GPON, enabling the reuse of optical fibers and splitters in legacy GPON system NMS in 10G GPON.

On the OLT side, the difference of wavelength for GPON and 10G GPON is addressed by adding the 10G GPON line card in the OLT through the WDM1r. This composes the two waves, enabling transmission in the same fiber.

In the remote, ONU side, the wavelengths are filtered and matched through the WBF1. After a 10G interface board is added to the unified OLT platform, smooth evolution from GPON to 10G GPON can be achieved, which completely leverages the value of GPON ODN and the CO device.

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