How to form a paramerterized url to call 1 Interactive BI Report from other Interactive BI Report

I Need to pass variable values from 1 Interactive BI Report to other Interactive BI report as a parameters. I am trying to form a parameterized url to achieve the same, However, I need the parameters to be changed dynamically based on current reports filter criteria, and the url i am trying is not taking the values dynamically. Can some one please help !!

The parameters i am trying to Pass is as follows

URL - XXXXXXXXXXX?P_Param1={Variable1}

In the above URL, Param1 is the parameter for the report being called and Variable 1 is the variable value getting fetched in the Current reports output.