Can you explain more about what do you want your BLE hub to do? For instance, if you have multiple peripherals devices you want to connect to with one central device you can take a look at the BLE multi-link example. If you would like your BLE to connect to for instance connect to the internet you could take a look at the nRF9160 DK together with the LTE Sensor Gateway example.
Could you maybe upload a drawing of what you want your network to look like?
We have a multilink demo which supports up to 20 concurrent peripherals, you can take a look at a demo video here. Do you want to make something like this perhaps?
