as shown in the above diagram you can use interview, to see the data types and use those in the report( act as abap client ). and call this method to send and recieve parameters.
Now we will look into the configuration objects.
configuration object are as same,
select sender business system(webasAbap) and receiver side Business system(web as abap) , in this case both are same. sender side no need of communication channel required. coming to reciver side XI communication channel required. before createing this channel . test weather it is supports the sap abap proxies/ activated, some times we can say, this may be the first step to start.
finding the httpport of sap ecc system
go to sap ecc system, use this transaction code SMICM.
go to Go to Service( http related) where you can see the list of service of http.
also check, sap ecc system, ready to send /use xi proxies, for this
go to sxmb_adm
Select integration engine configuration,
remember these two and select specific configuraion button,