Home network and its implementation

With the rapid development of broadband access technologies such as ADSL and Cable Modem, people can enjoy more and more Internet services at home. The popularity of network applications and the emergence of various information appliances have made home access to the Internet no longer limited to the previous single PC. Therefore, each family will be faced with how to transmit Internet broadband services within the home and how to The problem of connecting information appliances. From this, a new network and a new concept-home network came into being.

Home Network Technology

The full name of the home network in English is Hom eNetworking, which refers to the personal computer, household appliances, three meters (water meters, electricity meters, gas meters), lighting systems in the family category that can be extended to the entire house and the entire community. 1. A new technology for connecting the security alarm system to the computer wide area network.

At present, real smart home life requires at least three kinds of network support: broadband Internet, home Internet and home control network. Among them, broadband Internet access is a bridge for homes; home Internet is based on information appliances and is a lower speed network that can be well connected to the Internet; home control network is a lower level, just simple To control non-intelligent appliances. In a sense, such as Home PNA, it is just a transition and supplement before the popularization of information appliances.

Broadband Internet competition is fierce, and the advantages and disadvantages of all parties are obvious. For Ethernet, the technical indicators in all aspects are good, and it is also suitable for future development, but the cost is relatively high, and the one-time investment is relatively large, which is suitable for the construction of new communities. The technical indicators of Cable modem are also good, but the stability is poor. Since only the cable TV network is renovated, the cost is relatively low, and it is suitable for the renovation of old communities. Although satellite communication technology has more features, it seems that the cost is too high at present and can only be used in some special areas. xDSL is a more popular technology at present. Due to the use of existing telephone lines, the cost is lower, and the advanced code modulation technology makes it have a higher rate.

The many technologies that make up home internet can be broadly divided into two categories: wired and wireless. The principle of home network construction is: easy to use, simple to install, no additional wiring is required. Therefore, only the technology of wireless or using power lines and telephone lines is more in line with the requirements of the family. But at present, it seems that these technologies that use power lines, such as Hom ePlug, have the problems of expensive access equipment and insufficient technical maturity. The technology of using telephone lines also faces problems such as fewer telephone plugs in the home, inability to chip access products, and fewer support manufacturers. It is still difficult to promote them. In terms of wireless, there are currently three main technologies: IEEE802.11, HomeRF and Bluetooth (Bluetooth) technology.

The biggest difference between a home network and other networks is the complexity of the equipment. The interface and control of various electrical equipment are far more complicated than other data networks. A unified standard home network is a very tedious and laborious work. Therefore, the realization of the home network will be the coexistence of multiple network technologies. According to IN-STat analysis, the telephone line network in the future home network will occupy 50 ~ 70% of the market; wireless will occupy about 30%; the power line is less than 10%.

The main function of the home network is to realize the exchange of internal and external information in the home. In order to achieve the interconnection of the home internal network and the external network, a special device-Home Gateway is required. The home gateway is a centralized access point for homes and the Internet. Figure 1 is a typical home network structure.

Figure 1 Home network structure

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