Random multipath receive power and delay time generation

I'm trying to simulate an indoor environment that exhibits multipath propagation.

However, I don't know how to generate random multipath variables like path power and path delay (power-delay profile). I found a paper in here and I think this was the one I am looking for but I have a hard time understanding it.

For example: which distribution should be used for randoming other paths' power and delay values? Is it viable for indoors or is there a better approach for indoors?