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Mobile radio technologies began with low frequencies and progressed to millimetre-wave (mm Wave) methods, which are now used in 5G mobile communication networks. Furthermore, currently unused frequency regions greater than 300 GHz with wavelengths below 1 mm “(is known as THz frequency)” may permit mm-wave communications to evolve naturally in the future THz communication refers to wireless communication on these spectra, and it is seen as a viable solution for future high-data-rate communications beyond 5G for a variety of applications (Koenig et al., 2013) and (Kürner and Priebe, 2013). Wireless communication on these spectra is referred to as THz communication, and it is considered a promising solution to future high-data-rate communications beyond 5G for various applications. Researchers believe that the Terahertz (THz) band might be the main enabler for next generation wireless communication systems as to fulfill the requirement for terabit (Tbit) per second data speeds. Thus, terahertz channel modelling is a necessary and is a basic component to propagate the THz band wireless communication due to advancement in design of different THz device. Even though THz communication promises excellent performance, it is difficult to implement. Due to limitations in semiconductor technology, high-precision signal processing techniques and high transmission power cannot be implemented now. Moreover, despite its high carrier frequency, the THz channel suffers a substantial path loss, and its short wavelength results in a limited coherent distance, which means that the channel is highly sensitive to antenna displacements, making it difficult to implement dynamic applications. Given that multipath components (MPCs) do not overlap, the large bandwidth indicates frequency selectivity and good resolution in the delay domain. THz channels do not have the same channel characteristics as traditional Rayleigh and Rician fading channels. Furthermore, in recent study, the author has created a new model of the Terahertz band, which they explored through the channel power research, and they have explored the ability of this frequency band. In view of the specific features of the channel and the capabilities of the nano-machines, a series of communication mechanisms are developed for nano-network systems which comprise femtosecond pulse modulation, low weight channel coding schemes, a new symbol detection system for the receiver and the new nano-network medium access control protocol. The frequency range of wireless networking has increased constantly in order to accommodate the increasing demands for bandwidth (Nawaz et al., 2021) and (Sarieddeen et al., 2020). In the future generation (6G) and beyond, THz band communications (Akyildiz et al., 2014) and (Chen et al., 2019) significant function is anticipated, as millimetre-wave (mmWave)-band communication (Xiao et al., 2017) and (Rangan et al., 2014) are already developing in fifth generation (5G) mobile wireless communications.