5G or how the objects can «communicate» with each other

# 5G or how the objects can «communicate» with each other

You are still sleeping and the coffee machine is already making coffee for you. While you are working the fridge orders all the necessary food in a shop. Now it sounds fantastic but it’s our future. The wireless networks of the fifth generation will allow us to enjoy all the benefits of the Internet of Things. Irina Gudkova, the Associate Professor of the Department of Applied Mathematics of RUDN University, has become a laureate of the Prize to Young Scientists awarded by the Government of Moscow for developing a complex of probability models of control schemes for radio resources of the next-generation wireless networks. She told us about the innovative project and some problems.

Irina Gudkova’s grandfather and grandmother, who were mining engineers, implanted the love for mathematics in her. Her grandfather applied the theory of probability in his research and her grandmother had taught descriptive geometry for a long time. When Irina was in the eighth form her grandmother offered her to go to a correspondence math school at Moscow State University. Non-traditional but very interesting problems didn’t discourage the girl from math but on the contrary, they attracted her more to it. When Irina enrolled in RUDN University she chose applied mathematics. And it’s in her thesis when she started to apply the methods of theory of probability and Markov processes.

By 2020 test wireless networks of the fifth generation will have been specified and launched. And 5G networks will allow to have connection of better quality, high information transmission speed, the Internet of Things and other new services. But at the same time this will require more free radio frequencies whose range is limited at present.  One of the possible solutions to the problem is priority radio resource control. For example, one user has to make a call and at the same time another one wants to download a photo. And there is a free frequency for only one of these actions. The call is more important that’s why the transmission speed of the photo can be reduced.

«It’s important for users to know what is the possibility of a call to be made and how long it will take them to download a file, what kind of video streaming quality they will have and so on, - Gudkova said.  — There is another solution to the issue of range limitation. It is Licensed Shared Access, LSA. In this case both sides i.e. their owner, who has priority access, and a temporary user can have access to the frequencies. A small airport which serves 4-6 flights a day can act as an owner.  It often uses frequencies for aircraft telemetery. And a mobile operator which extends its frequency range via shared usage band when there are no flights can act as a user».

The wireless networks of the fifth generation will allow the objects to interact with each other without men. For example, a smartphone can launch a washing machine according to the programmed schedule or a fridge will scan its contents and send a list of products, which should be delivered, to a shop or delivery service.

The industrial internet, actual component of Industry 4.0 will become accessible. A robot will be able to be sent to a hazardous production facility or the one which is difficult to access and it will be controlled remotely via the network.

«We can move a mechanical assistant with a joystick and see the same as it can through augmented reality glasses. 5G will be able to be used for making remote operations by means of tactile internet technology which transmits remotely the movements and feelings. Being at a large city a surgeon will be able to participate in an operation in a distant village or even in another country», — Irina Gudkova added.

A doctor puts on a sensor glove and it transmits all his movements to a robot.

«The point is that 5G networks have high information transmission rate. You know, even a short delay can cost a patient’s life. 5G, compared to the actual networks will ensure the robot’s immediate response to the surgeon’s movements. What is meant here is developing high-speed networks with up to one millisecond latency in data transmission», — the woman-scientist says.

Both priority control schemes and random factors and radio frequency sharing mechanisms were taken into account. As a result, we have developed a complex of probability models.  The machinery of probability theory and mathematical theory of teletraffic was applied in the research.

There is a practical application of the research as well. It will help choose the optimum parameters for priority radio resource control schemes.  It also indicates how qualitative the customer service will be after launching the fifth-generation networks. According to the researcher, there may be applications for inventions in the coming years.

In autumn a laboratory of advanced research into wireless 5G networks of the Internet of Things will be launched at RUDN University. Professor Konstantin Samuilov will head it. A network for transmitting high data including radio segment will be deployed. There will be an opportunity to test the developed algorithms in the new laboratory. There will also be demonstrators typical for 5G, for example, demonstrators of tactile internet and augmented reality, there.