Explanation on wpa_supplicant logs

Sep 29 15:17:26 khokh wpa_supplicant[1327]: wlp0s20f3: CTRL-EVENT-SIGNAL-CHANGE above=0 signal=-63 noise=9999 txrate=585000
Sep 29 15:17:29 khokh wpa_supplicant[1327]: wlp0s20f3: Reject scan trigger since one is already pending
Sep 29 15:17:41 khokh wpa_supplicant[1327]: wlp0s20f3: CTRL-EVENT-SIGNAL-CHANGE above=1 signal=-63 noise=9999 txrate=585000
Sep 29 15:18:08 khokh wpa_supplicant[1327]: wlp0s20f3: CTRL-EVENT-SIGNAL-CHANGE above=0 signal=-63 noise=9999 txrate=585000
Sep 29 15:18:26 khokh wpa_supplicant[1327]: wlp0s20f3: CTRL-EVENT-SIGNAL-CHANGE above=1 signal=-63 noise=9999 txrate=585000

I’ve found the above in journalctl. What do they mean, what tweaks can I implement to get rid of these ?