how to aplly group on main report using sub report field

Hello All,

I have a report where I have a field state coming from sub report.

In my main report I need to show data like this.

State:Ap

data--------------------

data--------------------

data-------------------

State:Telangana

Data------------------

Data-------------------

data-------------------

But the state field is coming from sub report.I thought of using shared variable but it will not work.

So please suggest how to aplly group on main report using sub report state field