Understanding iOS Wifi Logging

Hi all,


in order to debug Wifi issues, I took a recording of the wifi logging as described here.


As a device I used an iPhone 11 Pro.


What makes me wonder is that there are entries where the iPhone seems not to receive any signal from the network.


5/10/2020 18:55:07.714 CurrentBSS {Praxis RB88 - 44:4e:6d:18:b1:76} {-70dbm, 1, 2848646ms } RoamCache - {}

05/10/2020 18:55:07.714 __WiFiLQAMgrLogStats(Praxis RB88:Stationary): Rssi: -70 {-70 -75} Snr: 21 Cca: 28 TxPer: 0.0% (5) BcnPer: 0.0% (49, 53.1%) RxFrms: 12 RxRetryFrames: 1 TxRate: 585000 RxRate: 520000 FBRate: 175500 TxFwFrms: 8 TxFwFail: 0 TxReTrans: 0 time: 3713.3secs fgApp: (null)

05/10/2020 18:55:07.715 WiFiLQAMgrCopyCoalescedUndispatchedLQMEvent: Rssi: -70 Snr:21 Cca: 28 TxFrames: 5 TxFail: 0 BcnRx: 49 BcnSch: 49 RxFrames: 12 RxRetries: 1 TxRate: 585000 RxRate: 520000 FBRate: 175500 TxFwFrms: 8 TxFwFail:0 TxRetries: 0

...

05/10/2020 18:57:09.702 __WiFiLQAMgrLogStats(Praxis RB88:Stationary): Rssi: 0 {0 0} Snr: 0 Cca: 6 (S:0 O:6 I:0) TxPer: 0.0% (0) BcnPer: 0.0% (0, 53.0%) RxFrms: 0 RxRetryFrames: 0 TxRate: 0 RxRate: 0 FBRate: 0 TxFwFrms: 0 TxFwFail: 0 TxReTrans: 0 time: 3835.3secs fgApp: (null)

05/10/2020 18:57:09.702 WiFiLQAMgrCopyCoalescedUndispatchedLQMEvent: Rssi: 0 Snr:(null) Cca: 6 TxFrames: 0 TxFail: 0 BcnRx: (null) BcnSch: (null) RxFrames: 0 RxRetries: 0 TxRate: 0 RxRate: 0 FBRate: 0 TxFwFrms: (null) TxFwFail:(null) TxRetries: 0

...

05/10/2020 18:57:09.798 WiFiLQAMgrCopyCoalescedUndispatchedLQMEvent: Rssi: -71 Snr:19 Cca: 6 TxFrames: 0 TxFail: 0 BcnRx: (null) BcnSch: (null) RxFrames: 0 RxRetries: 0 TxRate: 0 RxRate: 0 FBRate: 0 TxFwFrms: (null) TxFwFail:(null) TxRetries: 0

...

05/10/2020 18:57:14.638 CurrentBSS {Praxis RB88 - 44:4e:6d:18:b1:76} {-59dbm, 1, 2975569ms } RoamCache - {}

05/10/2020 18:57:14.638 WiFiLQAMgrCopyCoalescedUndispatchedLQMEvent: Rssi: -59 Snr:21 Cca: 8 TxFrames: 103 TxFail: 0 BcnRx: 213 BcnSch: 217 RxFrames: 121 RxRetries: 8 TxRate: 650000 RxRate: 585000 FBRate: 175500 TxFwFrms: 111 TxFwFail:1 TxRetries: 45

05/10/2020 18:57:15.089 __WiFiLQAMgrLogStats(Praxis RB88:Stationary): Rssi: -72 {-69 -73} Snr: 21 Cca: 8 (S:4 O:3 I:1) TxPer: 0.0% (103) BcnPer: 1.8% (217, 53.0%) RxFrms: 121 RxRetryFrames: 8 TxRate: 650000 RxRate: 585000 FBRate: 175500 TxFwFrms: 111 TxFwFail: 1 TxReTrans: 45 time: 3840.7secs fgApp: com.apple.Preferences

05/10/2020 18:57:15.090 WiFiLQAMgrCopyCoalescedUndispatchedLQMEvent: Rssi: -72 Snr:21 Cca: 8 TxFrames: 103 TxFail: 0 BcnRx: 213 BcnSch: 217 RxFrames: 121 RxRetries: 8 TxRate: 650000 RxRate: 585000 FBRate: 175500 TxFwFrms: 111 TxFwFail:1 TxRetries: 45


Do I read the logs correctly? Does this mean at 05/10/2020 18:57:09.702 the device did not receive anything from the wifi network? Does this indicate any transmission issues in the network or is it nothing to worry about?


Regards

Understanding iOS Wifi Logging
 
 
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