Piotr Gawłowicz
ABSTRACT
Smart antennas can unlock the potential of unlicensed spectrum by letting the coexisting networks transmit concurrently without harmful interference. This is possible by strategically allocating the antenna degrees-of-freedom for both beamforming toward the intended receiver and interference nulling toward the victim receiver(s). Our solution, named Xzero, achieves this goal for the particular case of LTE-unlicensed (LTE-U) and WiFi by overcoming the challenges of cross-technology interference nulling by a null search at the LTE-U BS with assistance from the WiFi network. Our demo shows a running prototype of Xzero implemented using USRP SDR platform running srsLTE and commodity WiFi hardware. We illustrate the change in the airtime of colocated WiFi and LTE-U networks upon activation of Xzero and fast reconfiguration of the null beam upon a change in WiFi node's location.
- Suzan Bayhan, Anatolij Zubow, and Adam Wolisz. 2018. Coexistence Gaps in Space via Int. Nulling for LTE-U/WiFi Coexistence. In IEEE WoWMoM.Google Scholar
- Piotr Gawłowicz, Anatolij Zubow, and Adam Wolisz. 2018. Enabling cross-technology comm. between LTE unlicensed and WiFi. In IEEE INFOCOM.Google Scholar
- Anatolij Zubow, Piotr Gawlowicz, and Suzan Bayhan. 2018. On Practical Coexistence Gaps in Space for LTE-U/WiFi Coexistence. In European Wireless.Google Scholar
Index Terms
- Cross-Technology Interference Nulling for Improved LTE-U/WiFi Coexistence
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