**6. Conclusion**

*Moving Broadband Mobile Communications Forward - Intelligent Technologies for 5G…*

processing so as to generate thousands of narrow-band beams to provide 5G

Each satellite up-link or down-link may consist of up to five channels of 1 GHz pass band resulting in a total pass band of 5 GHz depending on instant capacity required for a cell supported by a relevant satellite antenna beam. Any satellite UL-channel may be connected to any satellite DL-channel in compliance with used

Boeing company estimation results show that usage of a satellite network for fixed satellite channels and its spectrum sharing with a 5G terrestrial network in the frequency band 37.5–40.0 GHz would be feasible under the following conditions:

• the frequency band 37.5–40.0 GHz is used only for signal reception in FSS

• spectrum sharing between 5G satellite segment and 5G terrestrial segment is

• applying of space-time selection beam-forming methods for terminal antennas of satellite networks and 5G equipment in the aim to achieve higher data rate.

The power flux density (PFD) limits approved by ITU [11, 12] would provide protection for 5G network terrestrial segment from interference caused by FSS satellite network downlinks subject to meeting the requirement of minimal reduc-

Boeing simulation results also show that in the assumed spectrum sharing scenario the increasing of 5G base station power would result in enlarging a number of satellite receivers affected by interference from 5G users. Hence, it is required to adopt a (>50 dBW) level of mitigating the interference from 5G networks between FSS earth station receivers and transmitting mobile and base stations of 5G terres-

The results of Boeing statistical simulation and quantitative estimation of

• satellite earth stations may be in a higher degree directly affected by 5G base

• EIRP values for 5G terrestrial segment should be limited to 62–65 dBW, so as to facilitate interference-free shared operation of 5G satellite and terrestrial segments of FSS system to provide for achieving the required data transfer rates in

Therefore, the joint deployment of satellite and terrestrial segments of 5G network is subject to particular conditions related to joint use of spectrum in V-band. As confirmation, possibility of successfully utilization integrated satellite segment into 3GPP 5G testbed networks was the last demonstration of Surrey

Three use cases were demonstrated over a live satellite network via Avanti's GEO HYLAS 4 satellite and using iDirect's 5G-enabled Intelligent Gateway (IGW) satellite ground infrastructure that to 5G testbed core network of the University of Surrey to 5G UE terminals. All the 5G testbed use cases used this integrated 5G

The use-case for 5G moving platform was demonstrated over SES's O3b MEO

University achievements in 5G satellite network development [13].

satellite system for the live satellite connectivity.

satellite system, using real terminals and 5G core network.

network services through satellite segment on the Earth surface.

feasible due to high satellite elevation angles;

ing of 5G terrestrial network signal level to 0.2–0.6 dBW.

connection algorithm.

network downlink;

trial segment.

interference levels show that:

stations interferences;

5G networks.

**96**

The need to provide the coverage of large areas of developed countries with 5G networks and the creation of 5G satellite segment of integrate 5G system become relevant issues of development and standardization of 5G networks at the second stage of building these networks in the period 2020–2025, playing the pivotal role in forging Digital economy.

3GPP efforts allowed to obtain many different use cases of 5G satellite segment applications, architecture solutions on bent-pipe, and on-board processing technologies, which would implement in development of future satellite systems.

The leading international organizations in the field of telecommunications as ITU, 3GPP, 5G PPP joined their efforts with consortiums and satellite manufacturers in conducting the researches related to the elaboration of 5G within the radio frequency ranges that have been allotted to satellite radio service to 5G on WRC-19, especially in S-, Ka- and V-bands.

One of the most important issues of 5G satellite segment future development may refer to shared spectrum usage in the frequency bands allocated to 5G satellite and terrestrial segments on the primary basis. Also urgent is the issue of intersystem electromagnetic compatibility of aboard equipment and earth stations with base stations and user devices of 5G terrestrial segment.
