Abstract-Toward Location-aware In-body Terahertz Nanonetworks with Energy Harvesting

 

Filip Lemic, Sergi Abadal, Eduard Alarcón, Jeroen Famaey

https://arxiv.org/abs/2101.01952

Nanoscale wireless networks are expected to revolutionize a variety of domains, with significant advances conceivable in in-body healthcare. In healthcare, these nanonetworks will consist of energy-harvesting nanodevices passively flowing through the bloodstream, taking actions at certain locations, and communicating results to more powerful Body Area Network (BAN) nodes. Assuming such a setup and electromagnetic nanocommunication in the Terahertz (THz) frequencies, we propose a network architecture that can support fine-grained localization of the energy-harvesting in-body nanonodes, as well as their two-way communication with the outside world. The main novelties of our proposal lie in the introduction of location-aware and Wake-up Radio (WuR)-based wireless nanocommunication paradigms, as well as Software-Defined Metamaterials (SDMs), to THz-operating energy-harvesting in-body nanonetworks. We argue that, on a high level, the proposed architecture can handle (and actually benefits from) a large number of nanonodes, while simultaneously dealing with a short range of THz in-body propagation and highly constrained nanonodes.

Abstract-DS-OOK for Terahertz Band Nanonetworks

Pankaj Singh, Byung Wook Kim,  Sung-Yoon Jung,

https://link.springer.com/article/10.1007%2Fs40009-020-00955-7

This study proposes a method for modulation and multiple access based on Direct Sequence On–Off Keying (DS-OOK) for the pulse-based communication in the Terahertz (THz) band. Using the unique properties of OOK as a modulation scheme, direct sequence could be employed as a mechanism to distinguish between distinct users transmitting simultaneously. Moreover, this scheme does not require coordination between transmitter and receiver and can be implemented in both ad hoc and infrastructure-based networks. The performance of the scheme is analyzed in terms of bit error rate for different spreading codes. Simulation results show that the choice of a proper spreading code plays a critical role in employing DS-OOK for THz band communication and could enhance the multiple-access performance even with a large number of interfering users.

Abstract-An Energy Efficient Modulation Scheme for Body-Centric Terahertz (THz) Nanonetworks

Apostolos K. Vavouris, Foteini D. Dervisi,  Vasilis K. Papanikolaou, Panagiotis D. Diamantoulakis,  George K. Karagiannidis,  Sotirios K. Goudos,

https://www.mdpi.com/2227-7080/7/1/14

In body-centric communications, energy efficiency is a critical performance metric, while the achievable data rate is not of primary concern. In this paper we present a novel modulation scheme, which can be efficiently used in body-centric terahertz (THz) nanonetworks. The proposed scheme is a combination of the time-spread On-Off keying (TS–OOK) and the pulse position modulation (PPM) and presents lower energy consumption, compared to other existing methods as TS–OOK, at a minor cost to the data rate. Furthermore, another important aspect is that the proposed modulation scheme can be effectively used to mitigate the impact of the specific kind of noise in THz body-centric communications, thus leading to better error performance. Finally, we present analytical and simulation results in order to compare the new scheme with the existing TS–OOK.