scheduling of cellular networks with metasurfaces and relays

Due to their ability to smartly reconfigure the transmission environment and wireless radio propagation of mm-wave broadcasts, Intelligent Reflective Surfaces (IRS's) have demonstrated they can resolve some of the concerns associated with mm-wave technology. The IRS tunes the wireless environment to improve spectral and energy efficiency by combining a large number of low-cost, passively reflecting elements. By manipulating the frequency, amplitude, and phase of an incident wave, an IRS can then reflect the modified wave in the desired direction destination, avoiding the need for complicated signal processing. RIS is an artificial surface that's electronically controlled by integrated electronics and made of electromagnetic (EM) material, also has special wireless communication capabilities. Current implementations incorporate traditional reflective arrays, LC (Liquid Crystal) surfaces, and software-defined meta-surfaces. MM-Wave communications offer multi-gigabit wireless access due to their plentiful spectrum resources. Although it has high directivity and severe path loss, this technology is susceptible to blockage events, which can occur very frequently in dense urban environments. In order to overcome this issue, we introduced a new technology called an intelligent reflecting surface (IRS) that enables effective reflected paths to enhance mm-Wave signal coverage. Abstract: Due to their ability to smartly reconfigure the transmission environment and wireless radio propagation of mm-wave broadcasts, Intelligent Reflective Surfaces (IRS's) have demonstrated they can resolve some of the concerns associated with mm-wave technology. The IRS tunes the wireless environment to improve spectral and energy efficiency by combining a large number of low-cost, passively reflecting elements. By manipulating the frequency, amplitude, and phase of an incident wave, an IRS can then reflect the modified wave in the desired direction destination, avoiding the need for complicated signal processing. RIS is an artificial surface that's electronically controlled by integrated electronics and made of electromagnetic (EM) material, also has special wireless communication capabilities. Current implementations incorporate traditional reflective arrays, LC (Liquid Crystal) surfaces, and software-defined meta-surfaces. MM-Wave communications offer multi-gigabit wireless access due to their plentiful spectrum resources. Although it has high directivity and severe path loss, this technology is susceptible to blockage events, which can occur very frequently in dense urban environments. In order to overcome this issue, we introduced a new technology called an intelligent reflecting surface (IRS) that enables effective reflected paths to enhance mm-Wave signal coverage. The optimal closed-form solution for the single IRS case can be derived by exploiting some key characteristics of mm-Wave channels, while a near-optimal analytical solution can be derived for the multi-IRS case. For both the single IRS case and the multi-IRS case, our analysis shows that the signal power receives increases quadratically with the number of reflecting elements. According to the results, IRSs can create effective virtual line-of-sight (LOS) paths, which, in turn, improves mm-Wave communication robustness to blockages.

Abstract: Due to their ability to smartly reconfigure the transmission environment and wireless radio propagation of mm-wave broadcasts, Intelligent Reflective Surfaces (IRS's) have demonstrated they can resolve some of the concerns associated with mm-wave technology. The IRS tunes the wireless environment to improve spectral and energy efficiency by combining a large number of low-cost, passively reflecting elements. By manipulating the frequency, amplitude, and phase of an incident wave, an IRS can then reflect the modified wave in the desired direction destination, avoiding the need for complicated signal processing. RIS is an artificial surface that's electronically controlled by integrated electronics and made of electromagnetic (EM) material, also has special wireless communication capabilities. Current implementations incorporate traditional reflective arrays, LC (Liquid Crystal) surfaces, and software-defined meta-surfaces. MM-Wave communications offer multi-gigabit wireless access due to their plentiful spectrum resources. Although it has high directivity and severe path loss, this technology is susceptible to blockage events, which can occur very frequently in dense urban environments. In order to overcome this issue, we introduced a new technology called an intelligent reflecting surface (IRS) that enables effective reflected paths to enhance mm-Wave signal coverage. The optimal closed-form solution for the single IRS case can be derived by exploiting some key characteristics of mm-Wave channels, while a near-optimal analytical solution can be derived for the multi-IRS case. For both the single IRS case and the multi-IRS case, our analysis shows that the signal power receives increases quadratically with the number of reflecting elements. According to the results, IRSs can create effective virtual line-of-sight (LOS) paths, which, in turn, improves mm-Wave communication robustness to blockages.