Executing batch-input sessions in background jobs

Isn't there any possibility to process several Batch Input sessions in one background job?

Now we create with a own written program a lot of batch input sessions and we process these sessions in a background job with program RSBDCSUB as the only step. After this job has run all the batch input sessions

are submitted in background (there are as many jobs as batch input.

This causes sometimes a performance problem for the background processes

because all of these sessions are processed as separated jobs

(sometimes more than 100 batch input sessions = more than 100 background

jobs)