Upgrade NW ehp1

Dear all,

we are planning to upgrade from BI NW 70 to BI NW Ehp1 through SAP EHPI tool .The system details are

OS - HP UX IA64

DB - DB6

release - 08.02.0005

What is the required DB version to do a successful Upgrade?

Will there be any issues if we do BI Ehp1 upgrade without DB upgrade?

Kindly give some solution for continue upgrade.

Thanks and regards,

S.kiruba