SAP Fiori LDAP Integration

Hello,

We are implementing SAP Fiori as a Central Hub Deployment model, front end is NW 740 SP8, Back end is SAP ECC EHP7 on HANA. We want to integrate SAP Fiori with LDAP so that user's can use their AD user id and password.  We are not using SAP NW SSO or SAP EP.

Can you please let me know how this can be achieved ? Since User ID's should be same in front end, back end and HANA, how do i map user id's ?

Please help

Thanks,

Ravi