Question: What services does a PDCP entity expect from lower layers per RLC entity in an E-UTRA network, EXCLUDING the aspect of layer re-establishment?
Option 1: Acknowledged data transfer with success indications, Unacknowledged data transfer, and In-sequence delivery with Duplicate discarding.
Option 2: Only Acknowledged and Unacknowledged data transfer services without guarantees on sequencing or duplication.
Option 3: Guaranteed In-sequence delivery and Duplicate discarding without acknowledged/unacknowledged data transfer services.
Option 4: User plane data transfer service, similar to expectations from LWAAP entity.
Explanation: A PDCP entity anticipates not just basic data transfer services (both acknowledged and unacknowledged) but also assurances on the sequencing and integrity of packets. This encompasses in-sequence delivery to ensure orderly receipt of packets and duplicate discarding to prevent redundant data processing, alongside fundamental data transfer services. **Option 1** correctly bundles these expectations.