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Command to obtain Signal Level value for multiple client:

a. save the Mac addresses
iw dev wlan0 station dump iwconfig wlan0 | grep Signal Station | cut -d ' =' -f3 ' -f2

b. check the signal level for a particular Mac address
iw dev wlan0 station dump | grep -v "<Mac address>" | grep signal | cut -d ' ' -f1f3 | awk '{print $1}'

Command to obtain the frequency client is associated:

iwconfig wlan0 iwlist <interface> frequency | grep "Current Frequency" | cut -d ':' -f3 f2 | cut -d ' ' -f1

Based on Cisco chart for conversion of arbitary unit to dbm:

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Assuming, all wireless devices that support both 2.4GHz and 5GHz band will be automatically directed, to be connected to 5GHz initially. Here, if the number of clients connected to 5GHz is more than the set threshold value, i.e., 10, then network quality may degrade for the connected clients because many clients will be sharing the available band. For this, once the number of connected clients crosses threshold, few of the clients have to be steered to 2.4GHz.

Depends on:

a. More Number of Clients in the Band

b. Assuming client is in 2.4 GHz, Downlink Phy rate > = Phy Rate threshold => , then switch to 5GHz

5GHz, Assuming client is in5GHz, Downlink Phy rate < Phy Rate threshold => , then switch to 2.4GHz

c. Total Bandwidth utilized

Combining:

Before the clients are steered to 2.4GHz from 5GHz band, there has to be a check to decide which clients can be steered to a preferable band. If the clients whose signal strength is low, i.e., they are far from AP are retained in 5GHz and the clients with high signal strength are directed to 2.4GHz, the clients may lose connectivity.

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implementation

Architecture

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