There are more than one "peripheral" and more than one central. How can we eliminate the signal confusion?

Question

First I register the address of the central device to the peripheral device. When I work with a single peripheral device and a single central device, I can send commands from the central device to the peripheral device. But when I have more than one peripheral device in the vicinity, I can not send commands to the peripheral device registered from the central device. I think the signals are mixed up. Because, as I said at first, I can send peripheral commands to the central device when the peripheral devices are turned off and there is only one peripheral device. I used connectable undirected advertising. Because; 
 
 Peripheral device should be scannable and connectable 
 I send commands both by phone and by keyfob. 
 
 That's why advertising packet type should not be directed advertising as I know. When I scan by phone, I can see and select peripheral devices. But with KeyFob I do not have such a chance.If KeyFob is used, I think that KeyFob's head is mixed because I can not make a selection if there are more than one peripheral. 
 I read this link: devzone.nordicsemi.com/.../ 
 So, do you have any suggestions to scan and connect to the peripheral which I want with KeyFob? 
 
 I share sniffer pictures for information.

FormerMember · Accepted Answer

A central can choose which device it wants to send a connect request to. You would need a way to make sure the central connects to the right device, a way to distinguish the devices. An option is to connect to a device based on device name/uuid and RSSI.

There are more than one "peripheral" and more than one central. How can we eliminate the signal confusion?

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