running iOS 8

Huongle08 Post time 2019-8-2 16:57:26 | Show all posts |Read mode [Copy link]
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running iOS 8

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Post time 2019-8-2 16:57:26 | Show all posts |Read mode
This information applies to the following devices, running iOS 8 or later:
  • iPhone 5s and later
  • iPad Pro and later
  • iPad Air and later
  • iPad mini 2 and later
  • iPad (5th generation or later)
  • iPod touch (6th generation)


Trigger threshold
This is the minimum signal level a client needs to maintain a connection.
iOS clients monitor and maintain the Basic Service Set Identifier (BSSID)’s connection until the Received Signal Strength Indicator (RSSI) exceeds -70 dBm. Then, iOS scans for roam candidate BSSIDs for the new Extended Service Set Identifier (ESSID).
Keep this in mind when you design wireless cells and calculate their signal overlap. For example, you might design 5 GHz cells that have a -67 dBm overlap. In this case, the iOS client keeps its connection to the BSSID longer than you expect. This is because iOS uses -70 dBm as the trigger. If the BSSID's RSSI is greater than -65 dBm, the iOS client prefers a 5 GHz network.
Be sure to use the target device to measure cell overlap. Antennas on a notebook computer are much larger and more powerful than antennas on a smartphone or tablet. So if you use a notebook to measure overlap, iOS devices will have different cell boundaries than you expect.




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