LTE Packet Data Convergence Protocol (PDCP)

Packet Data Convergence Protocol (PDCP)

in PDCP, Specification, LTE PDCP protocol layer exists in UE & eNodeb, It is part of LTE air interface control and user planes.

The main services and functions of the PDCP sublayer for the user plane include:

Header compression and decompression: ROHC only;

Transfer of user data;

In-sequence delivery of upper layer PDUs at PDCP re-establishment procedure for RLC AM;

Duplicate detection of lower layer SDUs at PDCP re-establishment procedure for RLC AM;

Retransmission of PDCP SDUs at handover for RLC AM;

Ciphering and deciphering;

Timer-based SDU discard in uplink.

The main services and functions of the PDCP for the control plane include:

Ciphering and Integrity Protection;

Transfer of control plane data.

Protocol specification

3GPP TS 36.323 - Evolved Universal Terrestrial Radio Access (E-UTRA); Packet Data Convergence Protocol (PDCP) specification