doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> May 2018 Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: pureLiFi’s explanation to payload on MAC layer Date Submitted: 8 May 2018 Source: Nikola Serafimovski, Chong Han, Stephan Berner, Mostafa Afgani (pureLiFi) Address: 9 Haymarket Terrace, Edinburgh, UK, EH12 5EZ Mobile:[+44-7503016565], E-Mail:[chong.han@purelifi.com] Re: Abstract: pureLiFi’s explanation to payload on MAC layer Purpose: Contribution to IEEE 802.15.13 Notice: This document has been prepared to assist the IEEE P802.15. It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein. Release: The contributor acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P802.15. Chong Han (pureLiFi) <author>, <company>

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> May 2018 Answers for slide 9 Integrity Check Value (ICV) is involved in WEP MPDU cryptographic encapsulation. WEP computes the ICV over the plaintext data and appends this after the MPDU data. WEP encrypts the MPDU plaintext data and ICV using ARC4 with a seed. The ICV shall be computed and appended to the plaintext data prior to encryption, but the IV encoding step may occur in any order convenient for the implementation. The overhead is due to encapsulation for encryption. The maximum length of the Frame Body field can be determined from the maximum MSDU length plus any overhead from encapsulation for encryption --- from IEEE Std 802.11v2016 John Li (Huawei) <author>, <company>