Process $batch request also as batch in backend?

Hi,

lets assume we have the following scenario: In the (SAPUI5) frontend a user marks 200 record and hits a button that triggers an OData batch request to NetWeaver Gateway. In the backend the request calls some external service (where establishing of the connection might take some time).

In the "standard" behaviour of NetWeaver Gateway all the 200 requests will be processes seperatly in the backend (which - in our case - means 200 seperate calls to the external system).

Is there a way that I can collect all 200 requests at once and send them in one go to the external service resulting in only one call to the external service? (Of course the response returned to the UI depends on what the external service delivers...)

Thanks in advance!