Knowledge notes-Mobile Broadband Wireless Access

Based on the 802.20 standard mobile broadband wireless access technology, it has efficient transmission technology, large throughput, good mobility, and greatly broadens the limitations of the wireless network. This article will give you a brief introduction and hope to help you.

Mobile broadband wireless access technology 802.20)

The standard for research and development started by the MBWA Working Group is 802.20. The 802.20 standard, combined with the existing mobile data communication technology, is developing into a Technology Based on Mobile Air interfaces to achieve efficient IP packet transmission, so as to explore a mobile solution for IP service transmission.

IEEE 802.20 is a standard that applies completely to wireless access of mobile broadband. The main scope and technical features of this system are: the PHY/MAC layer specification of the air interface, suitable for mobile broadband wireless access systems that can interoperate with each other. It works in licensed frequencies less than GHz and optimizes IP data transmission. The peak rate per user exceeds 1 Mbit/s, it supports various on-board mobility of up to 250 km/h in the urban area, and significantly improves the spectrum efficiency, continuous user data rate, and number of active users compared with the existing mobile system. Its ultimate goal is to make this standard widely used in the world, so as to make it always online and freely available in Mobile Broadband Wireless Access Networks of different service providers.

The 802.20 standard will adopt orthogonal frequency division multiplexing (OFDM) technology to implement high-speed mobile data services. The 802.20 standard is an IP-based system that provides higher QoS protection to achieve spectrum efficiency and lower latency. Its data connection and transmission performance are comparable to those of Wired connections. 802.20 the system will optimize data transmission and provide mobility and global coverage, so that users can get practical and inexpensive services at the right time and place as needed.

The effective coverage of 802.20 is as high as 15 km, and the transmission speed supported in the urban area can reach the level of WLAN Network. Therefore, it has obvious cost-effective advantages compared with the current mobile communication network, it can provide users with comprehensive business services for voice, video, and data at a low price. 802.20 initial applications will be PDAs, laptops, smart phones, and other portable devices. The advantage of the 802.20 standard is that it provides excellent support for communication connections in the high-speed mobile status. For example, users can still maintain smooth communication connections when they are sitting in a vehicle with a speed of up to 250km km/h. It can be seen that in the high-speed mobile process, the target spectrum efficiency and data transmission rate stability provided by the 802.20 standard are all higher than the existing mobile communication system, this will provide technical support for wireless access applications in High-Speed Railway, subway, and highway environments.