Hi,
You cannot pass bulk data like structure or internal table through URL parameters. Why don't you use the other component in your component via Component usage.
Check the Component Usage Tutorial here: http://scn.sap.com/docs/DOC-8863
If you don't want to use the Component usage, pass the data using shared memory objects. Check my document here: http://scn.sap.com/docs/DOC-27396
The above mentioned Import/Export memory won't work in Web Dynpro context.
Hope this helps u.,
Regards,
Kiran