Our lab is equipped with hardware and software for emulation of mobile networks. The emulation is based on the open source software platform OpenAirInterface (OAI), developed by the OpenAirInterface Software Alliance, where we are a member. We exploit the software for development and validation of our theoretical solutions. The open source software enables us to modify arbitrary communication parameters and implemet our own solutions to go beyond the standardized communication protocols. To validate the cutting edge solutions, we also implement our ideas from a scratch.
We have developed a FlyBS is base on a hexacopter with Radio Access Network based on Open Air Interface. The mobile network is run on the attached Intel NUC and USRP B205 mini, while the the FlyBS is connected to an emulated mobile network. More details can be found in documentation.
In this demo the quality of channel between two devices is predicted based on the idea proposed in M. Najla, Z. Becvar, P. Mach, D. Gesbert, “Predicting Device-to-Device Channels from Cellular Channel Measurements: A Learning Approach“, IEEE Transactions on Wireless Communications, vol. 19, no. 11, pp. 7124 – 7138, 2020. As D2D communication is not yet fully available in OAI, we demonstrate prediction between a user equipment and a base station with knowledge of channels between the user equipment and few neighboring base stations.
Our Multi-access Edge testbed is based on the OAI with Open vSwitch local breakpoint. For the evaluation we exploit an Android application for augmented reality Percipio developed within our lab that supports computation offloading . The MEC testbed with the application enables not only to demonstrate MEC capabilities, but we can also optimize and measure communication latency and/or energy consumption of the mobile devices.
The self-optimization of RAN is done via developed API providing communication interface to MEC, where optimization of RAN is performed. We demonstrate the self-optimization capabilities via control of UE transmission power. The power control reduces the energy consumed by the UE and prolongs its battery lifetime. The details are in bachelor thesis of Jakub Novy “Mobile network optimization exploiting Multi-Access Edge Computing”.
We demonstrate efficiency of a centralized version of scheduler based on game theory, as proposed in I. Bistritz and A. Leshem. “Game theoretic dynamic channel allocation for frequency-selective interference channels.“, IEEE Transactions on Information Theory 65, no. 1 (2018): 330-353. This scheduler maximizes the data rate of each user by achieving close to optimal pure Nash equilibria.
We develop communication technologies to support communication of autonomous trains in collaboration with Ixperta (Czech company).