Electronics, Communication and Networks coexist and it is not possible to conceive the current society without any of the previous terms. 6G network is currently under development and more researchers are joining the research on 6G. Additionally, some chips able to operate at the Terahertz (THz) scale have been already introduced. Probably, next decade would be the scenario to observe the consolidation of 6G-based technology as well as lots of compliant devices.

The Conference on Electronics, Communications and Networks (CECNet) series has been established as a mature event after ten previous years of existence. CECNet is held annually covering many interrelated groups of topics such as:

• Electronics technology.

• Communication engineering and technology.

• Wireless communications engineering and technology.

• Computer engineering and technology.

The 11th International Conference on Electronics, Communications and Networks (CECNet 2021) was primarily scheduled to be held in Beijing, China on November 18–21, but was finally transformed into an online conference for the same reason as last year (COVID-19).

This book contains the papers accepted and presented at the 11th International Conference on Electronics, Communications and Networks (CECNet 2021), held on 18–21 November 2021 in a virtual way instead of onsite participation in Beijing (China). All papers were carefully reviewed by program committee members and took into consideration the breadth and depth of the research topics that fall into CECNet scope.

CECNet 2021 received 325 submissions and after a vivid discussion stage, the committee decided to accept 88 papers, which represents an acceptance rate of 27.07%.

I would like to thank all the keynote speakers and authors for their effort in preparing a contribution for this leading international conference. Moreover, I am very grateful to the people, especially the program committee members and reviewers, who devoted time to evaluate the papers. It is a great honour to continue with the publication of these proceedings in the prestigious series Frontiers in Artificial Intelligence and Applications (FAIA) by IOS Press. Our particular thanks also go to J. Breuker, N. Guarino, J.N. Kok, R. López de Mántaras, J. Liu, R. Mizoguchi, M. Musen, S.K. Pal and N. Zhong, who are the FAIA series editors, for supporting again this conference.

Finally, I hope you enjoy, so far, your virtual visit to Beijing, although with hopes of attending the conference in the future, face-to face.

Antonio J. Tallón-Ballesteros

Huelva city (Spain)

University of Huelva (Spain)