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Ether and fast ether network: ether network is often used in practice , simplicity and reliability is its advantage, and the cost is lower than other scenarios. The compatibility of it makes it convenient to upgrade from 10mpbs to 100mpbs and 1000mpbs ether network, and it benefits users from protecting the original investigates, so this is a preferred scenario in constructing HomeNet.

TL HomeNet: Home TL technology makes it possible to build a high speed network at home by use already existing telephone lines. The 10mpbs TL specification has been distributed in HomePNA 2.0, a digital product can be easily linked to the network by a interface module which connects the telephone line plug and the product. Addition, the xDSL technology extends the PL communication band, and makes the TL HOMENET can afford the multimedia applications.

PL network: this scenario interconnects the home digital devices by ubiquitous power lines, its biggest advantage is that most of the electronic products have been linked to PLs. Although the old PL network (X-10) have difficulties to carry high speed data information, the new technology has implemented high speed data transmission.

Wireless network: the advantages of it over wire network lie in flexibility, mobility and easy constructing. The technology maturity of the wireless network has been proved in the applications of restaurant communication and stock exchange information transmission, but the defect is its high cost in construction and the narrow communication band. With the appearing of new technologies, the wireless network will dominate the HomeNet market in the future due to its above tributes.

5. The End

There are still a lot things to do to spread the home network currently: first of all is the development of embodied OS and IC, then without the interoperable specifications the different devices can not communicate each other directly, and the integration of HomeNet becomes complicated due to much more protocols in the under lays, so much efforts should be taken to implement the dream of remote learning online, ordering online and so on through the HomeNet.

References

[1] MAURY WRIGHT: "Home-automation Networks mature while the PC industry chases a new home LAN", EDN JUNE 4,1998.
[2] Zhong xichang, Home digital devices PC WORLD CHINA , JAN 3, 2000 NO.1
[3] Cao jiuxin ect., The Technology and Design Strategy of HomeNet User Interface MINI-MICRO SYSTEM, 2000
[4] Home Automation Network Standards and Specs – Alliances and Working Groups . http://www.hometoys.com
[5] Kenneth P.Wacs, PH.D. Introduction to the CEBUS® communications protocol. HTINews Articles 1999

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