1, high speed
5G can be said to be standing on the shoulders of giants, relying on the good technical architecture of 4G, 5G can be relatively easy to build new technologies on top of it. One of the strongest aspects of the vision for the future of 5G is the speed of the network as experienced by the user. 4G is fast now, but not fast enough, and 5G is aiming for a maximum of 10Gbps.
Today's mobile networks operate in relatively low frequency bands, which have the benefit of superior propagation performance, allowing operators to achieve good coverage at low cost (a small number of base stations).
In 4G LTE, the maximum frequency range for a single carrier is 20MHz, and carrier aggregation technology can combine multiple non-contiguous carriers to achieve higher rates, but this is still not enough. 5G is characterized by high frequencies, and due to the limitation of high-frequency propagation performance, a lot of high-frequency frequency resources are not used, which is exactly the resources that can be utilized for 5G.
2, high-capacity
The topic of Internet of Things (IoT) has been a hot topic in recent years, but limited by the power consumption of terminals and wireless network coverage, wide-area IoT is still in a state of infancy, along with the emergence of the 5G network, we can foresee that in the future it will be a big hit. 5G will be used to support the development of IoT technology through what technical means? First look at how it will solve the core problem of Internet of Things technology: power consumption is the biggest obstacle plaguing the development of Internet of Things technology, because the Internet of Things nodes are too many, and because of the limitations of many conditions, there is no way to recharge the terminal, only through the initial loading of batteries, hoping that the terminal itself can save power, the longer it is used, the better. In order to solve this problem 3GPP specifically launched for wide-area IoT narrow-band IoT technology, by limiting the rate of the terminal (IoT terminals on the communication of real-time is generally not high), reduce the use of bandwidth, reduce the terminal transmitting power, reduce the complexity of the antenna (SISO), optimization of the physical layer technology (HARQ, to reduce the blind coding attempts), half-duplex to make the terminal's power consumption is reduced. And 5G will go even further than that, making terminals more power efficient by reducing signaling overhead and using non-orthogonal multiple access techniques to support more terminal access.
3, low latency and high reliability
LTE network emergence of the mobile network latency into the 100ms mark, so that the real-time requirements of high demand for applications such as gaming, video, data telephony become possible. The advent of 5G networks will bring latency down even lower, providing a growing soil capsule for more applications with extreme latency requirements.
The technical principle of delay reduction: a TTI in LTE is 1ms, while 5G will optimize the design of frame structure, each sub-frame will be shortened in the time domain so as to optimize the delay in the physical layer. It is believed that 5G signaling design will also be used to reduce the delay as the goal of signaling structure optimization.