We have seen in a previous article that BSS Color is used in identifying the BSS a 802.11 packet receiving station is connected to.

Spatial reuse operation is a method to use the BSS color for inter-BSS Packet detection and to adapt the station to function better in dense deployment conditions suffering from co-channel interference. In simpler words, reuse the same air medium simultaneously and more effectively between different Basic Service Sets.

Spatial Reuse operation can be based on:

1. Setting a packet detection “OBSS PD threshold” to ignore Inter-BSS PPDU. Two methods are defined in this:
   1. Based on non-SRG OBSS_PD (non- Spatial Reuse Group OBSS Packet Detect) level
   2. Based on SRG OBSS_PD (Spatial Reuse Group OBSS Packet Detect) Level
2. PSR (Parameterised Spatial Reuse) based spatial reuse

The following articles, we attempt to understand spatial reuse groups and the different spatial reuse operations

Spatial Reuse Groups (SRGs)