RUDN mathematicians strike a balance between reliability and power consumption of 5G networks


Mathematicians from RUDN University have constructed a 5Network model G, which allows you to achieve a balance between energy costs and connection reliability. The results are published in the IEEE Communications Letter.

Newswise — One of the hallmarks of fifth-generation 5G mobile networks is multi-connectivity. The device can connect not to one, but to several access points at once. This improves the reliability of the connection. However, from the point of view of power consumption, this method is not efficient and therefore is not used in practice. RUDN mathematicians have proposed a model that helps to determine the balance between power consumption and connection reliability. With its help, it is possible to choose the optimal network parameters.

“The standardization of 5G technology is complete and operators are starting to implement these systems. To avoid network cuts, there is a multiconnectivity function. The device is allowed to maintain multiple communication channels with base stations and switch between them to avoid interruptions in operation. This option improves performance. At the same time, it is extremely power-intensive, as it takes it to keep communication lines active and backup at the same time,” said Daria Ostrikova, PhD, associate professor in the Department of Applied Computer Science and Probability Theory, University RUDN. .

Mathematicians took as a basis the technology of DRX – discontinuous reception. Its essence is that in order to save energy, the receiver of the device periodically turns on and off. If reception is disabled for too long, multihoming will not only not improve reliability, but will increase the likelihood of communication loss. If the reception lasts too long, a loss of connection is unlikely, but too much energy is wasted.

Mathematicians from RUDN University have built a model of a 5G network under real conditions. It is assumed that the base stations are located in several buildings and that users equipped with devices move between them. One device connects to multiple stations. At the same time, users are constantly moving and moving the device in their hands – all this affects the connection. The mathematicians compared three on-off reception strategies. The proportional scheme turned out to be the best – with it, the device sets the same shutdown periods for all available base stations. At the same time, micromobility – small movements of the device in the hands of the user – even improves the reliability of communication.

“Our model implements a trade-off between power efficiency and latency in multi-homed 5G systems. We explored how performance is affected by environmental characteristics. It turned out that micromobility has a positive impact on energy efficiency,” said Vitalii Beschastnyi, senior lecturer at RUDN University.


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