Everyone thinks that 5G refers to the fifth generation after 4G, but they are all wrong - even smart phone operators spread the wrong message - this is the German Dresden University of Technology (TU Dresden) Communication network professor Frank Fitzek highlighted the focus of SEMICON Europa 2015.
"5G sounds like a further upgrade of 4G, but it's not," Fitzek said. "5G technology is purely for the control and manipulation of Internet of Things (IoT) devices."
Frank Fitzek, a professor at Dresden University of Technology, known as the "5G Man" (5G Man), demonstrated the prototype of the display wall, which can achieve low latency of only 1 millisecond (ms) using 5G technology; the prototype of the system will be in NFL American football Live broadcast during the season (but he did not disclose which course)
To prove their point, Fitzek cites the highest and lowest data projections – by 2020, there will be up to 500 billion units/at least 50 billion IoT devices interconnected worldwide. He pointed out that most of these devices will not be smart phones, because there are only 7 billion people on the planet.
“Even if everyone has 2 mobile phones, it will be dwarfed by the number of 5G connected cars, connected trains, connected robots, connected networks, connected cities, connected health care, and connected education. "Fitzek said, "For the 14 billion smart phones that are hand-held, 4G technology is good enough. 5G certainly allows smart phones to browse the web faster, but 5G is not built for it, and It is to solve the problem - especially the delay problem that 4G can't solve."
In order to control autonomous vehicles, cars, robots, and other various IoT devices that people dream of, it is necessary to connect in a way closer to today. They need to actually use different paths to send the same signal (Fitzek says that although TCI/IP can use different paths, if you track the router that transmits the signal to the same endpoint, it will be the same every day).
Fitzek said: "Autonomous vehicles will be truly connected vehicles, because efficiency and safety will require communication with fixed delays. Smart factories and smart robots also need to be interconnected with fixed delays. And what I call Tactile Internet - You can really feel the texture of the object at the far end, everything requires a fixed delay; no matter what path the signal takes, the delay time is the same - 1 millisecond."
To prove this, Fitzek handed me a head-mounted display, set a 1ms delay and threw a football to me, I easily caught it. After losing a few balls back and forth, he changed the delay setting to 10ms. I couldn't get the ball. Even when I set it at 2ms, he stood in front of me and lost the ball. The ball is also in my hands. Sliding down, I can't hold anything.
He said that it can also be displayed with more examples of automatic robots, cars, factory machines, etc., and the results will be the same. The difference between 4G and 5G is that a 1ms delay is ensured, thus making the networked IoT device more universal, reliable, secure and stable.
In order to improve the defined reliability, throughput, latency, complexity and energy consumption, 5G utilizes key technologies of collaborative strategy and network coding.
I retorted, "What should I say when the car is driving at 55 miles per hour?" He immediately smiled and made me fall into a well-designed trap.
Fitzek is "yes, but they are basically driving at the same speed. Therefore, they still need 1ms delay relative to each other to communicate effectively. The first car transmits a 1ms delay signal while braking. After that, the second car will send the signal to the next car, and so on. You only need to ensure a 1ms delay."
Fitzek insists that in order to comply with the 5G specification, all we have to do is achieve a delay of 1 millisecond, no matter how far the signal is transmitted, plus it ensures that even the world's most powerful hackers can't crack the encryption. technology. It is quite difficult to achieve a more secure encryption technology without affecting latency, but Fitzek said that he has organized a group of graduate students to experiment with his ideas for more than a decade, and I believe that this challenge will be overcome soon. .
During this decade of research, Fitzek's students have split out five companies and are currently working to advance the different levels of the 5G revolution. He said that these research concepts include complex mathematical calculus, but they can be executed quickly; they are energy efficient, reliable and super safe. Although he does not intend to publish these results yet, we have already seen the strength of 1ms.
Network slicing, combined with cognitive operations, local storage and local networking within each base station, plus random encoding and re-encoding during transmission, can only be decoded by the intended recipient. The tools to achieve this are software-defined networking (SDN), software-defined storage, and software-defined radio (SDR) to increase flexibility, reorder packets, decode multiple encoded data paths, and most importantly—both Must be implemented with a 1ms delay.
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