Competition Between WiMAX and Wi-Fi, DSL, and 3G (1)

WiMAX is called World Interoperability for Microwave Access, that is, global Microwave Access Interoperability. As a wireless MAN technology, WMAN is a new air interface standard for microwave and millimeter wave frequencies. It is used to connect 802.11a Wireless Access hotspot to the Internet, or connect the company and the home environment to the wired backbone line. It can be used as a wireless extension technology for cables and DSL, known as "wireless DSL", to achieve wireless broadband access. WiMAX features mainly in the following aspects:5g millimeter wave speed

① The frequency is 2 GHz to 11 GHz;

② Transmission distance up to 31 miles (50 km );

③ The maximum data rate of each segment is 70 Mbit/s per sector, and each base station can have up to 6 sectors;

④ In terms of service quality, different service levels can be supported, so that enterprise users who use T1 type connection and home users who use DSL type connection can also be supported.
It also supports voice and video. WiMAX supports point-to-point or point-to-point network structures. You can choose to operate in licensed frequencies or licensed spectrum, depending on your needs for service levels, the maximum transmission distance of WiMAX is 31 miles. WiMAX and Wi-Fi, 3G, and DSL will coexist in a long period of time, and compete with each other in the overlap area to a certain extent.

Millimeter wave 5g speed

I. WiMAX and DSL

XDSL can be divided into symmetric rate and asymmetric rate based on the same upstream and downstream speeds. XDSL with symmetric rate has multiple forms, including IDSL, HDSL, SDSL (SinglelineDSL), and HDSL2. Asymmetric xDSL has ADSL (asypolicric DSL) and G. lite ADSL and VDSL (Very high bit rate DSL. The most widely used technology is ADSL. ADSL is a new technology that transmits telephone services and data signals simultaneously on a pair of twisted pair wires, in addition, up to 640 Kbit/s can be uploaded online to a single user, and up to 1.5 ~ 8 Mbit/s transmission rate. In addition, ADSL uses advanced digital signal processing technology to reduce the impact of line damage on Transmission Performance. Although ADSL adopts advanced digital signal processing technology, encoding and modulation technology, and error correction technology, many features of user lines are introduced during the promotion of ADSL Services, factors such as background noise, pulse noise, insertion loss, crosstalk between lines, line diameter change, line bridging head, line joint and Line Insulation on the line will affect high-speed rate transmission service performance.

Millimeter wave health risks

The Difference Between WiMAX and DSL is obvious. In terms of the use environment, WiMAX technology is used for wireless access, while DSL technology is used for Wired Access. WiMAX technology is more flexible than DSL technology in networking applications. In terms of transmission rate, the maximum rate of WiMAX technology can reach 30 Mbit/s, and the theoretical maximum rate of DSL technology can reach 58 Mbit/s, but DSL is more vulnerable to the influence of user line characteristics, the actual rate may decrease. In terms of coverage, WiMAX can reach up to 6 miles, while DSL can only cover 3.6 kilometers (2.2356 miles ). Despite the obvious weakness of DSL technology compared with WiMAX technology, DSL technology is based on existing copper wires and the cost is significantly lower than WiMAX, but over time, once the development of WiMAX significantly reduces the cost, DSL technology will be threatened to be eliminated by WiMAX technology.

Ii. WiMAX and Cable

Cable Modem technology can be divided into two-way symmetric Transmission and non-symmetric Transmission. The symmetric transmission rate is 2 Mbit/s ~ 4 Mbit/s, up to 10 Mbit/s. The downlink rate of asymmetric transmission is 51 Mbit/s, and the uplink rate is 500 Kbit/s ~ 31 Mbit/s. CableModem is not just a Modem. It integrates Modem, tuner, encryption/Decryption device, bridge, network interface card, virtual private network proxy, and Ethernet Hub functions. It does not require dial-up access and does not occupy telephone lines. It can provide permanent online connections at any time. Because all user signals of CableModem are transmitted on the same coaxial cable, there is a risk of wire eavesdropping. The tree-like network of CATV also causes single point of failure (spof), such as cable damage, amplifier fault, and transmitter fault, which may interrupt user services on the entire node. Although early users of Cable Modem can enjoy excellent services, the bandwidth and frequency band of the line are abundant when there are few users. However, the addition of each Cable Modem user will increase noise, occupy channels, reduce reliability, and affect the existing user service quality on the road.

Millimeter wave spectrum 5g

However, WiMAX technology does not have these concerns and ensures security and stability. In addition, CableModem can be applied only after the transformation of the HFCs is completed. At present, most of China's HFCs can only meet the bandwidth requirements of 450MHz, while the two-way service provided by HFCs requires at least MHz of bandwidth. 5g and millimeter wave This clearly requires replacement of all non-conforming coaxial cables. At the same time, to achieve two-way HFCs, You need to replace the one-way amplifier currently used on the Cable TV network. High transformation costs also make the Cable technology difficult to compete with WiMAX technology.

Iii. WiMAX and Wi-Fi

Wi-Fi is short for Wirelessfidelity. Wi-Fi technology includes approved IEEE802.11a, B, and g specifications and 802.11n specifications awaiting approval. Wi-Fi is the first high-speed wireless technology widely deployed, it is particularly eye-catching in global hot spots-including home and office as well as an increasing number of coffee houses, hotels and airports, and Wi-Fi hot spots almost immediately swept the world, in addition, because of its ability to improve work efficiency, it is sought after by people traveling outside. However, the range of Wi-Fi is very limited: users can achieve high-speed connection only when they are 300 feet away from the Wireless Access Point device (AP. Wi-Fi is one of the earliest high-speed wireless data technologies, and now it has benefited a lot from a large number of support products and technologies. Some of the latest platforms even support multiple Wi-Fi standards (such as 802.11a, B, and g) to support compatibility between several wireless networks. Although Wi-Fi has many advantages, its security risks are a fatal weakness. Wi-Fi uses RF technology to send and receive data through air. Because wireless networks use radio waves to transmit data signals, they are very vulnerable to external attacks. Radio waves can penetrate walls and partitions, hackers can easily steal data from the radio waves or even access the unprotected company's internal LAN.

5g millimeter wave frequency 

In the face of the aggressive development of WiMAX, some public opinions believe that WiMAX will replace Wi-Fi, but some people think that WiMAX will not replace Wi-Fi, and both sides will complement each other in wireless access. The most obvious difference Between WiMAX and Wi-Fi is that there is a huge difference in coverage. Wi-Fi can only reach 300 feet of coverage, but can only be used in Wireless LAN environments, wiMAX802.16e usually reaches 1 ~ 3 miles, mainly used in mobile wireless MAN environments.