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Comparison of 802.11ac and 802.11n PHY layers

100%

Masiukiewicz A.

Kwartalnik Naukowy Uczelni Vistula

2014

issue 2(40)

111-123

802.11ac, n and ad are three newest IEEE standards. 802.11n implements a lot of new proposals especially in PHY and MAC layers while in 802.11ac there aren’t any new technologies but only optimization and development of ac new ideas. Both propose significant increased in throughput but only ac reaches the level which could guarantee the multimedia successful communication. Author compares the most important features of PHY layers of both standards.

802.11ac, n i ad to trzy najnowsze standardy IEEE. W przypadku 802.11n wprowadzono szereg nowych rozwiązań, szczególnie w warstwach fizycznej i dostępu, podczas gdy 802.1ac właściwie nie zaproponował nic nowego, a jedynie zoptymalizował i rozwinął pomysły swojego poprzednika. Oba standardy znacząco zwiększyły dostępne przepustowości, ale tylko ac oferuje taki poziom przepustowości, który gwarantuje skuteczne transmisje multimedialne. W artykule porównano najważniejsze parametry warstw fizycznych obu standardów.

The Capacity and Effectiveness of Screening People and Baggage with the Use of New Technologies: Standard C2

80%

Uchroński P., Kozuba J., Letun M., Brzeska K.

Safety & Defense

2022

vol. 2

One of the basic elements inseparably connected with air communication is the security control of persons and luggage which is performed by certified OKBs entered on the list of the President of the Polish CAA. An area of interest is the security check of hand baggage passengers take with them on board the aircraft. This control is carried out based on current legal regulations in the field of civil aviation security and is designed to detect prohibited and dangerous items hidden in the passenger's luggage specified in these legal acts. Due to the fact that the catalogue of these items is not included in an enumerative way, the security control operator assesses the possibility of using any item other than that specified in the document in terms of the possibility of making an act of unlawful interference. However, the skills of the security control operator are only one of the elements affecting the effectiveness of the security check being performed. The technical background and degree of technical sophistication are no less important in the control process. This paper aims to indicate possible organizational solutions to be applied in practice, which have a measurable impact not only on the effectiveness of the security control performed but also on the throughput at the security checkpoint, which in turn determines the operational readiness of the entire airport. The authors, through empirical studies carried out at airport security checkpoints equipped with different technical and technological solutions, quantitatively indicate the benefits of using new technologies and the possibility of choosing the organization of work at the security checkpoint, depending on the needs arising from the nature and number of flight operations.

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1 Kwartalnik Naukowy Uczelni Vistula

1 Safety & Defense

1 2022

1 2014

1 Brzeska K.

1 Kozuba J.

1 Letun M.

1 Masiukiewicz A.

1 Uchroński P.

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Comparison of 802.11ac and 802.11n PHY layers

The Capacity and Effectiveness of Screening People and Baggage with the Use of New Technologies: Standard C2