IEEE Std 802.11aq-2018 pdf download – Telecommunications and information exchange between systems L ocal and metropolitan area networks- Specific requirements Part 11: Wireless L .AN Medium Access Control | (MAC) and Physical Layer (PHY) Specifications Amendment 5: Preassociation Discovery.
4.5 Overview of the services 4.5.4 Access control and data confidentiality services Insert the following subclause (4.5.4. 10) after 4.5.4.9: 4.5.4.10 MAC privacy enhancements When a non-AP STA searches for, and connects to, an infrastructure BSS, IBSS, or PBSS or attempts to discover services on a network preassociation, it defines the addressing of its MAC layer for the particular connection. If the STA uses a fixed MAC address it is trivial to track the STA. An MSDU transmitted by a STA is assigned a sequence number that, if never reset, can also be used to track a device irrespective of the MAC address. If OFDM is used, the PHY DATA scrambler used can enable tracking of a device irrespective of the MAC address if it is not reseeded. The dynamic nature of BSS membership combined with this tracking information allows for construction of a network of connctions, locations, and behavior. This network can be used to glean private and sensitive information regarding the individual behind the device. Furthermore, even without establishing a connection, a mobile or portable STA that gratuitously transmits Probe Request frames containing SSIDs of favored in frastructure BSS networks, or announces the existence of IBSS networks, can reveal potentially sensitive information about its location and location history. To mitigate this sort of traffc analysis a STA can support the ability to peridically and randomly change its MAC addresses and reset counters and seeds prior to association. While discovering networks, a STA can refrain from gratuitously transmitting Probe Request frames containing SSIDs of favored BSS networks. 4.5.9 Interworking with external networks Insert the fllowing subclause heading (4.5.9.1), and change the text (originating from the former 4.5.9) of the now 4.5.9.1 as shown:
4.5.9.1 General The interworking service allows non-AP STAs to access services provided by an external network according to the subscription or other characteristics of that extermal network. An IEEE Std 802.11 non-AP STA might have a subscription relationship with an external network, e.g, with an SSPN.