R3 (RFC Asynch) --> XI <---> SOAP (webservice Synch)

Hi Experts,

My scenario is :R3 (RFC Asynch) > XI < -> SOAP(webservice is synch)

Step1:- R3 sends the data webservie(SOAP) via XI.

Step2:- Webservice returns the response to XI, But R3(RFC) does not need the resoponse.

how to handle the webservice response in XI.

do i need to use BPM as this scenario is R3(RFC synch) > XI < --> Webservice(soap, synch). Can anybody help me out how to design this scenario.

Thanks,

Dhanush