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Understanding 802.11ak Architecture and Co-existence with Legacy Standards

This presentation provides an in-depth overview of the 802.11ak architecture, focusing on its co-existence with existing 802.11 standards. It highlights that 802.11ak operates independently, with distinct SSIDs and associations for non-AP STAs. The paper discusses the interoperability constraints and the rules for the association process within mixed environments. Key aspects include 802.11ak's unicast and multicast handling, MAC port services, and the limitations on direct links between non-AP STAs. The implications of these features for network design and performance are also analyzed.

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Understanding 802.11ak Architecture and Co-existence with Legacy Standards

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  1. 802.11ak Architecture Authors: • Date:2013-07-16 Broadcom

  2. Abstract • This presentation discusses • 802.11ak architecture • 802.11ak / 802.11 co-existence Broadcom

  3. 802.11ak & 802.11 Co-existence • The 802.11ak architecture does not interfere with the existing 802.11 architecture • 802.11ak BSS has its own SSID • 802.11ak non-AP STAs only are associated to 802.11ak AP STAs • An attempt to associate a non-11ak non-AP STA to an 11ak BSS will always end in failure • A BSS of mixed 11ak and non-11ak non-AP STAs is not possible Broadcom

  4. 802.11ak & 802.11 Co-existence • Simplified interoperability • Limited to BSS overlap • 11ak MSDU header must be discriminable and ignored by non-11ak STAs • 11ak Unicast MSDU address mapping could use the 4 MAC address for inner (P2P 11ak link) and outer MAC addresses • 11ak Multicast MSDU inner address mapping is TBD (but could use any new defined field to specify the MC set) Broadcom

  5. 802.11ak MAC Port Services • The association of an 11ak non-AP STA to an 11ak BSS will result in • the 11ak AP exports to its upper layers an instance of a MAC Port service of the point-to-point 11ak link instance between this AP and the associated 11ak non-AP STA • the 11ak non-AP STA exports to its upper layers an instance of a MAC Port service of the point-to-point 11ak link instance between this non-AP STA and the 11ak AP to which it associated • Note: 802.11ak Rev1 does not support non-AP STA to non AP STA direct links Broadcom

  6. Broadcom 802.11 and 802.11ak Architecture Co-existence Illustration: [1] The “Physical” View

  7. Broadcom 802.11 and 802.11ak Architecture Co-existence Illustration : [2] The “Logical” View 11ak AP 11ak AP 11ak STA 11ak STA 11ak STA cf Fig 4-6 IEEE Std 802.11™-2012

  8. Broadcom 802.11 and 802.11ak Architecture Co-existence ESS across 11ak Link roaming

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