Abstract
Simultaneously with the beginning of the implementation of the fifth generation wireless networks (5G systems), the research of the next generation mobile wireless systems - the sixth generation network 6G, has began. Having in mind the already started considerations on the components of the future 6G technology, it is necessary to follow the given technological trends, which are waiting for us beyond 5G era. This paper will explain the range of communication needs and technologies within the future 6G. 6G is expected to include three main aspects, mobile ultra broadband, super Internet-of-Things (IoT) and Artificial Intelligence (AI). The paper will present an overview of the crucial technology that is planned to achieve the first two aspects. In particular, THz communication could be used to support mobile ultra-broadband, while symbiotic radio and satellite communications to support super IoT. For each technology, the basic basic principle of functioning, key challenges and currently current approaches and solutions will be given. It will be especially emphasized what 6G brings in relation to 5G, ie what are the key new characteristics.
Highlights
У складу са Уговором потписаним између Министарства рударства и енергетике Републике Србије и Савеза инжењера и техничара Србије, а на основу Правилника о условима, програму и начину полагања стручног испита за обављање послова у објектима за производњу, пренос и дистрибуцију електричне енергије
This paper will explain the range of communication needs and technologies within the future 6G. 6G is expected to include
The paper will present an overview of the crucial technology
Summary
Prenos u opsegu niskofrekventnog spektra ima svojstvo široke pokrivenosti, ali postiže se mala brzina prenosa zbog relativno uskog opsega. Uz povećanje zahtjeva za velikom brzinom prenosa podataka, predlaže se da 5G koristi mmWave opseg, koji može da obezbijedi nove širine opsega reda nekoliko GHz. Ipak, mmWave opseg uvijek ne ispunjava zahtjeve za širinom opsega u 6G scenarijima. Da bi se dodatno povećao propusni opseg i povećala brzina prenosa, predviđeno je da 6G koristi THz opseg, u kome je raspon širine opsega teoretski tri reda veći nego u mmWave opsegu. THz signali imaju velike gubitke prilikom propagacije u slobodnom prostoru. Na slici 5 su prikazani gubici usled propagacije u THz opsegu. Slika 5 - Gubici usled propagacije u THz opsegu THz opseg može podržati samo kratke udaljenosti (reda metara i manje), ali ne i bežične komunikacije na srednjoj/većoj udaljenosti. THz opseg može udovoljiti zahtjevima za velikom brzinom za prenos podataka. S druge strane, masivna propusnost čini da je THz komunikacija otporna na ometanja
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