A Power Saving Scheme for IEEE 802.15.3d THz Wireless Communication Links

Abstract

Terahertz (THz) band spans the frequencies lying between 0.1 and 10 THz and represents the gap between millimeter waves and Infrared bands. THz will play an influential role in mitigating the spectrum resources shortage to meet the exponential growth of services and wireless devices. Standardization activities are being carried out to regulate the THz band's exploitation under the IEEE 802.15 standardization project. Despite the generous bandwidth, THz communications suffer from high pathloss and attenuation due to Molecular Absorption. As such, THz systems need to use extra power, suitable antennas, and enhanced signal processing and communication techniques to compensate for different signal attenuation sources. In this paper, we propose a new operation mode for the IEEE standard 802.15 to save the power transmission requirement while achieving the required data rate. Hence, less battery or antenna size is needed to support the same communication link quality. To this end, we optimize the power, modulation scheme, and channel allocation to minimize the total transmitted power keeping a minimum quality-of-service. Moreover, the design captures the effect of humidity on the system performance.

On Outage Performance of Terahertz Wireless Communication Systems

“…However, due to the currently available data sets, we still cannot identify the exact values of ζ(d, f ) for different application scenarios, but we are able to approximate the range of η(d, f ) to be [0.61, 1.80] for different transmission distances and radio frequencies, by inspecting the data of internal channel power loss in 11 [26]. The channel variation factor δ s (d, f ) is assumed to be white and distance-independent for simplicity.…”

“…where ε is a preset outage threshold depending on the system specifications and service demands. Substituting (11) and ( 12) into ( 14), the outage probability of a THz communication system utilizing the ith transmission window can be reduced in (15). It should be noted that we consider the general case here with a random transmitted packet size.…”

“…networking, indoor localization, environment monitoring, ehealth, and defense will become realities within the next decade [8]- [10]. In addition to the advantage of tremendous spectrum, THz wireless communication systems are also miniature, energy-efficient [11], and secure [12]- [15]. Based on these unique advantages brought by THz communications, the THz frequency spectrum has been regarded as the last piece of radio frequency (RF) spectrum puzzle and the most promising option for high-speed and secure transmissions in the 6G era [7].…”

“…In fact, the data presented in[40] refers to the internal channel power loss, but since the gain is simply the reciprocal of the loss, the data of the internal channel power gain can be easily obtained 11. The approximation of this range is detailed in Appendix A.This article has been accepted for publication in IEEE Transactions on Communications.…”

Innovative Trends in the 6G Era: A Comprehensive Survey of Architecture, Applications, Technologies, and Challenges

“…In 2019, the FCC approved experiments of 95 GHz -3 THz spectrum ranges and launched a new spectrum license with low barriers and minimal cost to drive the development of the THz spectrum [93]. IEEE has been employing the first steps toward the THz communication standard by forming the IEEE 802.15.x standard [94]. ITU defined spectrum in the range [0.12-0.2] THz for wireless networks [95].…”