ZyXEL Communications PLA-470 V2 - V3.0.5 Guía de instalación descargar pdf (Pagina 314)

CHAPTER 13

Hybrid PLC

The recent developments of computer communication media have multiplied the

network media (wired Ethernet, Wi-Fi, PLC, optical fiber, cable TV, and so forth)

providing the suitable throughputs, coverage, and transit time to new generation

applications.

Since none of these media offers by itself the ideal capacities, hybrid networks

appeared in order to make the best use of these technologies. However, a good

knowledge of them is necessary in order to optimize the architecture and the config-

uration of these new networks.

Nowadays, the wired Ethernet networks are those that are the most expensive,

in particular because of the wiring-related work. However, they are still those pro-

viding the best performance and a guaranteed service close to 100%. When such

networks cannot be built, it can turn out to be interesting to use complementary

technologies as a basis.

This chapter aims at highlighting the interest of the current PLC technologies

compared with other network technologies. With the emergence of the HomePlug

AV specification, the PLC technologies add to the PLC advantages (easy deploy-

ment, low cost, open-endedness, security) and global performance capable of com-

peting with these other technologies.

Coexistence of Multiple Networks

The coexistence of network technologies, whether wired or wireless, creates distur-

bance. For example, the propagation of PLC signals over the electrical wirings emits

an electromagnetic field likely to disturb not only the other communication systems,

like radio networks, but also the various PLC technologies themselves.

Since one of the major developments with regard to the network coexistence is

precisely the juxtaposition of PLC and Wi-Fi, it is important to understand and con-

trol these disturbances.

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ZyXEL Communications PLA-470 V2 - V3.0.5 Guía de instalación Pagina 314