| Comfortable living environment has been a goal pursued by mankind. With the rapid development of electronic information technology, from radios, television sets, telephones to computers, to even national promotion of digital television, the emergence of new things each gives the comfort and convenience to our daily lives. Along with the rapid development of technique, people have higher requests to their living environment. Network and intelligence in family has become the new direction for the development of 21st century home.At present, the smart home industry research has become the focus of attention because of its larger scale of the market, its wider prospects. The major manufacturers, companies and organizations have put their smart home design, using all kinds of products, but because of the intelligent home network design and application of various methods-Field bus, Ethernet, the electricity line of force and so on, which makes these products have many problems, such as compatibility and versatility. Different manufacturers'products are different in the software protocol and hardware interface. So, most of the smart-home products do not have mutual connectivity and easy-maintenance, which results in the tremendous waste of resources and manpower. But compared with the other bus, Ethernet has excellent compatibility, ease of use, maintainability and the most extensive universal scope. All of these make Ethernet become the new hope of unified industry standards.This article first analyzed each kind of popular smart-home communication systems extant recently. Through the long time research and the thorough understanding of each kind of communication systems in smart-home nowadays, including their structures and principles, the paper points out each kind of present smart-home communication systems' respective superiorities and their insufficiencies.According to the investigation and study result, this paper, based on Ethernet, comes up with a design program built on the basis of Ethernet. This kind of smart-home nodes which can be compatible with Internet existed is composed of the C8051F020 as the main controller and the RTL8019AS Ethernet adapter chip as a interface to Ethernet. Through rewriting improved TCP network communication protocols to MCU and programming application software in remote computer, it realizes the smallest system of household appliances remote control. Moreover, through programming the simplified network protocol compatible with the generic Ethernet, it completes the standardization of the hardware interface and software protocol, also attempts the initial improvement to data transmission uncertainty of business Ethernet caused by collision. |
