Errors in wifi.log

My attention has been drawn to a sequence of errors in the wifi log. They seem to happen for spells of half an hour or so and repeat several times during the day.

Is anyone able to tell me what they are, are they anything I need to worry about?

Thank you for your help.

Wed Jan 10 14:18:04.931 Usb Host Notification Error Apple80211Set: Device power is off seqNum 4708 Total 11 chg 1 en1

Wed Jan 10 14:18:05.720 Usb Host Notification Apple80211Set: seqNum 4709 Total 11 chg 1 en1

Wed Jan 10 14:18:05.749 Usb Host Notification Apple80211Set: seqNum 4710 Total 11 chg 1 en1

Wed Jan 10 14:27:15.072 Usb Host Notification Error Apple80211Set: Device power is off seqNum 4711 Total 11 chg 1 en1

Wed Jan 10 14:27:15.842 Usb Host Notification Apple80211Set: seqNum 4712 Total 11 chg 1 en1

Wed Jan 10 14:27:15.868 Usb Host Notification Apple80211Set: seqNum 4713 Total 11 chg 1 en1

Wed Jan 10 14:28:58.514 Usb Host Notification Error Apple80211Set: Device power is off seqNum 4714 Total 11 chg 1 en1

Wed Jan 10 14:28:59.288 Usb Host Notification Apple80211Set: seqNum 4715 Total 11 chg 1 en1

Wed Jan 10 14:28:59.305 Usb Host Notification Apple80211Set: seqNum 4716 Total 11 chg 1 en1

Wed Jan 10 14:35:44.406 Usb Host Notification Error Apple80211Set: Device power is off seqNum 4717 Total 11 chg 1 en1

Wed Jan 10 14:35:45.339 Usb Host Notification Apple80211Set: seqNum 4718 Total 11 chg 1 en1

Wed Jan 10 14:35:45.374 Usb Host Notification Apple80211Set: seqNum 4719 Total 11 chg 1 en1

Wed Jan 10 14:48:45.343 Usb Host Notification Error Apple80211Set: Device power is off seqNum 4720 Total 11 chg 1 en1

Wed Jan 10 14:48:46.606 Usb Host Notification Apple80211Set: seqNum 4721 Total 11 chg 1 en1

Wed Jan 10 14:48:46.669 Usb Host Notification Apple80211Set: seqNum 4722 Total 11 chg 1 en1

Wed Jan 10 14:49:04.616 Usb Host Notification Apple80211Set: seqNum 4723 Total 11 chg 1 en1