access icon free Efficient beam selection and resource allocation scheme for WiFi and 5G coexistence at unlicensed millimetre-wave bands

© The Institution of Engineering and Technology
Received 02/08/2019, Accepted 22/07/2020, Revised 10/05/2020, Published 30/07/2020

To alleviate the spectrum scarcity, the unlicensed 60 GHz band has raised increasing concerns due to its continuous large bandwidth. Considering IEEE 802.11ad/ay has already been deployed in this millimetre-wave band, the coexistence issues with new radio-based access to unlicensed spectrum should be weighed when deploying fifth generation (5G) network. Fortunately, the directional transmission on beams is able to reduce interference significantly, so beam selection can be combined with power control. To maximise spectrum efficiency (SE) of the 5G network while ensuring a friendly coexistence, the authors formulate an optimisation problem by jointly considering beam selection and resource allocation. More specifically, they design a spectrum planning mechanism to reduce the interference between 5G and WiFi, and then a block coordinate descent method is used to determine the user association, beam selection and power control for 5G users, while limiting the interferences to WiFi devices. Simulation results verify the effectiveness of the proposed algorithm in terms of complexity, convergence and SE.

Inspec keywords: optimisation; wireless LAN; telecommunication network planning; power control; resource allocation; telecommunication control; millimetre wave communication; radiofrequency interference; 5G mobile communication

Other keywords: directional transmission; spectrum scarcity; spectrum planning mechanism; resource allocation scheme; unlicensed spectrum; beam selection; efficient beam selection; unlicensed millimetre-wave bands; continuous large bandwidth; radio-based access; interference reduction; fifth generation network; user association; WiFi devices; optimisation problem; spectrum efficiency; block coordinate descent method; power control; frequency 60.0 GHz; resource allocation; IEEE 802.11ad/ay; 5G network

Subjects: Local area networks; Mobile radio systems; Electromagnetic compatibility and interference; Computer communications; Communication network design, planning and routing; Control applications in radio and radar; Power and energy control; Optimisation techniques; Optimisation techniques

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