Uu Interface Sublayers PDCP Worksheet 02

Sequence Numbering

Header Compression (UP only)

ADD PDCP Header

Ciphering

Integrity Protection (CP only)

Transmitting PDCP EntityUE/E-UTRAN

In order delivery and duplication detection (UP only)

Header Decompression (UP only)

Remove PDCP header

Deciphering

Integrity Verification (CP only)

Receiving PDCP EntityUE/E-UTRAN

ROHC Status PDU

PDCP Status Report

Packet Associated to a PDCP SDU

D/C DPU Type(001) R R R R

ROHC Feedback or

Signaling PKT

D/C DPU Type(000)First Missing

(SN)

FMS SDU Contd

BITMAP - If PDCP SDU immediately following

missing PDU good

Reports missing or duplicated PDCP PDUs

after a handover

Header compression control information

Note: PDCP is used for SRBs and DRBs mapped onto DCCH and DTCH type of logical channel. PDCP is not used for any other type of logical

channel

Packets not associated

to a PD

CP

SD

U

Packet Associated to a PDCP SDU

Packets not associated

to a PD

CP

SD

U

PDCP Header IP Data

D/C R R R PDCP SN

PDCP Header Control Packet MAC-I (32 bit)

R R R PDCP SN

IP data = Variable might be ciphered/compressedD = Data packetC = Control packetR = ReservedSN Sequence Number 7 or 12 bitControl Packet = variable length containg RRC packet might be encrypted

MAC-I = 4 byte integrity check

For user plane data

For control plane data(distinguished by MAC-I

field)

Note: Service Access Point (SAP) provides service to layer aboveRx Service Data Unit (SDU) from above

Prepares Protocol Data Unit (PDU) for layer below

PDCP Control PDUs (only used within the UP)

Long SN (retransmissions) or

short SN (7 bits) VoIP

Note: PDCP Control PDUs

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