Hi Deepesh,
As you mention that you are in BODS 4.0 and BW 7.3 environment, BODS supports option to trigger the BW InfoPackage from BODS. Once you trigger BODS job in BODS side, the data will be moved to SAP BW PSA, then you can trigger the DTP in BW side to fuhrer move the date to target layer in BW side.
Also please elaborate that what your looking, so i can help you more.
Thanks,
Ramakrishna Kamurthy