ZyXEL Communications PLA-470 V2 - V3.0.5 Przewodnik Instalacji Pobierz pdf (Strona 29)

PLC Forum

The PLC Forum is an international body created at the beginning of the 2000s from

the merger of two associations. It develops its activities in coordination with other

bodies working on PLC.

Toward a Standardization of PLC Technology

Any standardization is a slow process. This is not surprising if we consider that it

requires the consensus of the members of the particular work group before any deci-

sion is made.

Although this approach has proven to be efficient in most industrial fields, it is

perhaps less suited to information technologies, the national standards of which

should be aimed primarily at satisfying clients’ immediate needs.

Future IEEE Standard

At the beginning of June 2005, the IEEE steering committee validated the creation of

a draft PLC standard under the title “IEEE P1901 Draft Standard for Broadband

over Power Line Networks: Medium Access Control and Physical Layer Specifica-

tions.”

The standard will apply to high throughput PLC equipment (greater than 100

Mbit/s at the physical layer level), in the frequency range lower than 100 MHz, and

will address access techniques and internal networks. Furthermore, it will set out to

define coexistence and interoperability mechanisms among the various items of PLC

equipment, the quality of the service provided, and data confidentiality.

Almost all of the parties involved in PLC are involved in this project, in particu-

lar those listed in Table 1.1.

Future Interoperability Standard

An interoperability standard is being prepared to tackle multiple PLC specifications

and technologies present in the domestic, professional, and public electrical net-

works.

Since the electrical network used as a communication medium is shared, these

various technologies coexist on the electrical cables in the same frequency bands.

Therefore, the various parties involved in PLC work together within the IEEE and

CEPCA (Consumer Electronics Powerline Communication Alliance) to make them

interoperable. This future standard is detailed in Chapter 14, which covers the pros-

pects of PLC networks.

Advantages and Disadvantages of PLC

Like any viable system, PLC has both advantages and disadvantages in comparison

with competitive technologies.

10 Introduction

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ZyXEL Communications PLA-470 V2 - V3.0.5 Przewodnik Instalacji Strona 29