Meaning of log: wifi:bssid equal: ss_state=0x4

[binhla]

Can anyone explain what is this debug log meaning.
It continuously sended when i enable wifi's log.

D (26480) wifi:bssid equal: ss_state=0x4
D (26580) wifi:bssid equal: ss_state=0x4
D (26680) wifi:bssid equal: ss_state=0x4
D (26780) wifi:bssid equal: ss_state=0x4
D (26890) wifi:bssid equal: ss_state=0x4
D (26990) wifi:bssid equal: ss_state=0x4
D (27090) wifi:bssid equal: ss_state=0x4