>How did you evaluated that -65dbm is better than -45dbm? On scanning events >amount? >-65 is usually already low signal. (relatively to the noise however)
3 meters away from 5GHz access point and my laptop shows -47dBm, with 2.4GHz ap 5m away -54dBm, I really don't want to scan every 30secs. With quite many Qualcomm based Android devices WCNSS settings have: gNeighborLookupThreshold=76 gNeighborReassocThreshold=81 So having -65dBm instead of -45dBm should be still reasonable. >Depends on what you are trying to achieve, a better user experience (better >connectivity) or better battery life. >I bet such background scans are not that power greedy (it's all passive >anyway). Though it would require >a proper physical measurement to know about that. It's not really passive as the device is told to scan every 30secs and bg_simple will go through all channels and not just particular ones like bg_learn. >When you say "scanning will block other operations", this is a bit scary: >bg_scan in wpa_supplicant handles >concurrent scan requests and others properly. It should not block anything >really. Scanning itself blocks all other operations as the wlan-chip will need to go through all available channels and it can't handle data transmit/receive during that time. See: QoS-Aware Channel Scanning for IEEE 802.11 Wireless LAN, http://w3.antd.nist.gov/pubs/1569105587.pdf Br, Pasi _______________________________________________ connman mailing list connman@connman.net https://lists.connman.net/mailman/listinfo/connman
