Isn't 5g technology first developed in Europe and America in 213? Why is it a patent of Huawei now? Who invented it?

5G technology can be understood as a technical trend, which is composed of countless patents. For example, a mobile phone needs a mobile phone case, a battery, a screen, a chip and other parts. Huawei's role is the chip, and it has mastered the core key technologies of 5G. Others' technologies are all marginal and irreplaceable.