What is 5g? At that time, there was a person who had spent 800,000 news because he didn't turn off the Internet. The speed of 4g made everyone feel incredible, it was too fast. So what about 5g? 5g is not yet available, is 5g faster than 4g? 5g I don't know.
Since the 1980s, from analog voice to digital voice, from mobile broadband to mobile Internet, mobile communications have been changing the world at a rate of about every 10 years.
In the past, most of these services could only be achieved through fixed broadband networks, and the future 5G will let them move. They are characterized by the need for as much bandwidth as possible to achieve extreme traffic throughput and minimize latency.
At present, even the most advanced LTE modems can only reach gigabits/second at the fastest rate, but often users in one cell already have gigabit-level bandwidth consumption, and more large-traffic services, the future It will continue to develop, so increasing bandwidth capacity is an inevitable trend in the future development of mobile networks.
Take ultra-high-definition video as an example. Even after compression, the bandwidth rate of each 8K video will exceed 100M/sec. If a cell has 5 to 10 or even 100 users, the existing 4G network can only crash. Blocked.
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In the past, this delay did not affect our experience. Because when the network is more to serve people, people's response to delay is not strong. But in the future, when 5G networks are connected to everything, lower latency is needed.
A typical example is autonomous vehicles. In the past, automatic driving, more through the car's own sensors, to perceive surrounding information and make judgments, but these sensors have their own limits and limits. Not long ago, the accident of a Tesla car colliding with a trailer in the United States was such a painful case.
At present, Qualcomm and other manufacturers are promoting the future of unmanned driving technology, including the information collection of the car itself, as well as the real-time communication and communication between the car and the car, and even the car and the cloud network, thereby calculating, judging and real-time the unmanned driving of the car. Adjusted to be more secure.
But in a traffic accident, one second may decide to live and die. With the existing network, it is impossible to ensure the timely transmission of information. Only when the delay is further reduced, even below 1 millisecond, this unmanned technology can really mature, and 5G networks are expected to bring such low latency.
Massive Internet of Things
Unlike the mobile Internet with mobile phones as the node, the Internet of Things has a huge difference in the demand for the network.
In the past, mobile networks have had a large limit on the number of terminals connected to the network at the same time. In the IoT environment, there will be more sensors and smart devices connected to the network, but the functions of these devices are mostly single, and the frequency and traffic demand of the network is far less than that of mobile phones.
A typical example is that in the industrial Internet of Things and smart cities, there are a large number of public facilities measurement needs, such as water meters, electricity meters and public environmental information monitoring, all of which collect environmental information data through various sensors.
Because of the particularity of measurement, these sensors are often very low cost. They may not be connected once a week or even a month. After deployment, they do not need to be replaced for many years. They even need to be deployed in underground or relatively closed indoor environments. Wireless signals are easily faded. This requires the IoT connection to be very energy efficient and has very deep coverage.
Therefore, in terms of massive Internet of Things, 5G also supports more IoT devices, accessing the network with lower power consumption, and even enabling 1 million terminals to connect to the network at the same time, while the battery life of the networked terminals can also be long. 5 to 10 years.
In summary, in terms of performance, 5G will achieve greater bandwidth, lower latency, and more network connectivity.
To achieve these breakthroughs at the same time, 5G will become a super-complex communication system with extremely high requirements for connection technology.
Prior to this, LTE was already compatible with Wi-Fi and 2/3G technologies, supporting more than 50 frequency bands, about 200 carrier aggregation combinations, and even more than 2000 modem characteristics.
The future of 5G networks will need to support a wider variety of scenarios, wider applications, more frequency bands and more advanced technologies. For example, 5G will use more frequency bands simultaneously to fully meet the needs of enhanced mobile broadband, mission-critical services and massive IoT.
Among them, the frequency below 1GHz has a longer coverage distance, facing the massive Internet of Things; the frequency from 1GHz to 6GHz supports larger bandwidth, and is oriented to enhanced mobile broadband and mission-critical services; frequencies above 6GHz such as millimeter waves can Achieve extreme bandwidth for ultra-long-range mobile broadband.
What is the increase in frequency resources brought about by this?
So many different technologies, different deployment methods, and different technology models must all be implemented in the same network and in a unified design architecture.
This is 5G.
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