Exploring the criteria for selecting home broadband access methods

With the popularization and application of access networks, the access technology is also being upgraded, and there are also many types of home broadband access methods. Users only need to select their own broadband access networks as needed, here we will introduce the selection criteria and hope they will be useful to you.

Before using many home broadband access methods, such as ADSL, FTTB, wired and power lines, we should remember that we use MODEM for dial-up! In fact, what we call broadband today is more narrow band. Both common dialing and one-line ISDN connections belong to narrow band, and their data transmission rates are 56 Kbps and 128 Kbps respectively. Therefore, kbps should be the line between narrow band and broadband.

The so-called Broadband refers to an INTERNET connection that is dozens to hundreds of times faster than dial-up INTERNET access and is 24 hours online. Specifically, the data transmission rate greater than kbps can be called broadband. Only through the broadband network can we enjoy the real digital life: e-commerce, distance education, telemedicine, online entertainment, and so on. This is the inevitable direction of network development in the future. So what should I do when selecting an access method to smoothly watch the 2006 World Cup football match? Don't worry about making blind choices. Let's analyze and compare them one by one.

I think many of my friends are familiar with the ADSL access method. Simply put, it is a technology that can provide broadband data services through common telephone lines, ADSL supports the uplink speed of Kbps to 1 Mbps, And the downlink speed of 1 Mbps to 8 Mbps. The valid transmission distance is 3 ~ The distance between 5 kilometers refers to the distance from the user's computer to the local computer room ). The structure of ADSL can be viewed as a star structure, because each user has a separate line connected to the ADSL local terminal, so the data transmission bandwidth is exclusive to each user.

Generally, ADSL uses a common telephone line as the transmission medium. The user end only needs to install an adsl modem on the port of the telephone line. When using ADSL to access the Internet, Modem will generate three information channels: one is a high-speed downstream channel, the other is a medium-speed upstream channel, and the other is a normal telephone channel. These three channels can work at the same time. That is to say, on the same telephone line, you can surf the Internet and send a fax by phone, without affecting the call quality or reducing the Internet performance.

Power Line access is a new network access method that has been fierce in the past few years. It is a communication method that uses power lines to transmit data and voice signals. This technology is to load the high frequency of information contained in the current, and then transmit it using wires, the modem that receives the information then separates the high frequency from the current and sends it to the computer or telephone for information transmission. The current communication rate varies between MB and MB depending on the specific device ~ Between 45 m, this rate makes this access method immediately dazzling. It can use the power line of Transmission Current as the communication carrier, so that the power line has great convenience, as long as there is a power outlet in the room, without dialing, you can immediately enjoy high-speed network access, to browse webpages, make phone calls, and watch online movies.

The cable-connected access mode is hosted by radio and television networks. It is a type of broadband that uses cable television lines. In terms of speed, the access speed can reach 2 ~ 10 M. The maximum theoretical value is 34 Mbps. Cable-connected (hybrid fiber-optic coaxial network) is developed from traditional cable television networks. Traditional cable television networks are mostly coaxial cable systems or microwave cable systems, and can only transmit dozens of TV programs. With the development of social economy and the increasing demand for information, traditional cable TV networks are hard to meet their needs. In the early 1990s s, with the maturity and development of optical transmission technology, people began to consider using optical transmission in cable TV systems. This cable TV network adopting optical transmission is Hybrid optical Fiber/coaxial network Hybrid Fiber Coax, it has the advantages of high bandwidth and capacity.

Fiber-optic access is also an increasing number of access methods. FTTBFiber To The Building) is a home broadband access method based on The optimized high-speed optical fiber LAN technology. FTTB + LAN uses optical fiber to the building and network cable to achieve broadband access for the user's home. Specifically, ISPInternet service providers (ISPInternet service providers) Introduce optical fiber cables to the building, and use switches and hubs in the building to connect to users through twisted pair cat5e or cat5e. Among them, single-mode optical fiber high-speed network to local Gigabit Optical Fiber), then from the local end to the residential area or building G optical fiber), and finally from the building to the user 10g five category network cable ). FTTB can provide 10 Mbit/s bandwidth for the whole building or residential area. However, because the user lines of the entire building or residential area pass through the same optical fiber for data exchange, therefore, this FTTB + LAN method provides users with a shared bandwidth.

In addition, FTTB uses leased line access, and users do not need to dial like ADSL. They only need to install a network card on the computer, and then can access the INTERNET for 24-hour high-speed INTERNET access. FTTB's access to ISP is certainly not as busy as normal dial-up Internet access. FTTB's access to the Internet is only fast or slow, and there will be no access busy, in addition, because FTTB is not connected to the INTERNET through the telephone exchange network, it only occupies Network Resources in the home broadband access mode. When FTTB is used to browse the INTERNET, no telephone fee will be generated.

1. Comprehensive comparison of various Wireless Access Technologies
2. Frequency of wireless access technology
3. Comprehensive comparison of common Broadband Wireless Access Technologies
4. Evolution of wireless access technology
5. Broadband Wireless Access Technology in China