The key technologies for 5g wireless are satellite communications, low latency technology, millimeter wave, self-organizing networks, and cognitive radio.

1, satellite communication

Satellite communication is a kind of communication between two or more earth stations by using artificial earth satellites as relay stations to relay radio waves. The International Telecommunications Satellite System (INTELSAT), currently in use, was established in accordance with the above principle, with three satellites located over the Atlantic, Pacific and Indian Oceans.

2, low-latency technology

Low latency refers to a shorter time delay in a computer system or communications network. It is often used to refer to the time it takes for a network packet to make a round trip from the sending computer to the receiving computer over a network connection. In other cases, it may refer to the time it takes for data to be imported into and exported from a computer's random-access memory Using a ping test is the most reliable method of calculating network communications latency.

3. Millimeter wave

There is no too precise definition of the millimeter wave frequency band, and the electromagnetic waves in the frequency domain of 30~300GHz are usually called millimeter waves, which are located in the wavelength range where microwave and far-infrared waves overlap, and thus have the characteristics of both wave spectra. The theory and technology of millimeter wave are the extension of microwave to high frequency and the development of light wave to low frequency, respectively.

4, self-organizing network

The self-configuration and self-optimization characteristics of the network in the LTE standard is referred to as SON, the characteristics of the network structure can be better adapted to the flattening of the network structure and flexibility, to reduce the operators of the network operation and maintenance of the artificial cost, so increasingly attracted the attention of everyone.

5, cognitive radio

The concept of cognitive radio originated in 1999 with the seminal work of Dr. Joseph Mitola, whose core idea is that CRs have the ability to learn and interact with their surroundings in order to sense and utilize the available spectrum in the space, and to limit and reduce the occurrence of conflicts.