In our previous post Understanding WLAN Power Save Mode, we have seen an overview of 802.11 power save standards, mechanisms, and tools to simulate power save clients. In this blog, we will delve deeper into legacy power save mode – mechanism, process, drawbacks and simulation of WiFi clients with legacy power save enabled.
Power Management Mechanism
Every 802.11 Power Management mechanism begins with an STA (WiFi Client Device) associating with a BSS and getting an Identifier. Every STA associated with an AP will have an Association Identifier (AID), which an AP assigns to an STA. The AID for an STA will be present in the Association response or Reassociation response.