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Content for TS 25.446 Word version: 16.0.0

1… 4…

4.1 General aspects for the SYNC protocol for UTRAN 4.2 General aspects for the SYNC protocol for E-UTRAN 5.1 General 5.2 SYNC protocol layer services 5.3 Services Expected from the UP Data Transport layer 5.4 Elementary procedures 5.5 Elements for the SYNC protocol 5.6 Handling of unknown, unforeseen and erroneous protocol data

4 General

4.1 General aspects for the SYNC protocol for UTRAN

4.1.1 General aspects

4.2 General aspects for the SYNC protocol for E-UTRAN |R9| Word‑p. 8

4.2.1 General aspects

5 SYNC protocol version 1 Word‑p. 9

5.1 General

5.1.1 Applicablity of SYNC protocol version 1

5.1.2 Operation of the SYNC protocol

5.1.3 Interfaces of the SYNC protocol layer

5.2 SYNC protocol layer services

5.3 Services Expected from the UP Data Transport layer

5.4 Elementary procedures Word‑p. 10

5.4.1 Transfer of User Data for MBMS procedure

5.4.1.1 Successful operation

5.4.1.2 Unsuccessful operation

5.4.2 Transfer of Synchronisation Information for MBMS procedure (without user data) Word‑p. 11

5.4.2.1 Successful operation

5.4.2.2 Unsuccessful operation

5.5 Elements for the SYNC protocol Word‑p. 12

5.5.1 General

5.5.2 Frame format for the SYNC protocol

5.5.2.1 Transfer of Synchronisation Information without payload (SYNC PDU Type 0)

5.5.2.2 Transfer of User Data for MBMS with uncompressed header (SYNC PDU Type 1) Word‑p. 13

5.5.2.3 Transfer of User Data for MBMS with compressed header (SYNC PDU Type 2) Word‑p. 14

5.5.2.4 Transfer of Synchronisation Information with Length of Packets (SYNC PDU Type 3) |R9| Word‑p. 15

5.5.3 Coding of information elements in frames Word‑p. 17

5.5.3.1 PDU Type

5.5.3.2 Timestamp Word‑p. 18

5.5.3.3 Packet Number

5.5.3.4 Elapsed Octet Counter

5.5.3.5 Total Number Of Packet

5.5.3.6 Total Number Of Octet

5.5.3.7 PDCP Information Word‑p. 19

5.5.3.8 IPv6 Indicator

5.5.3.9 Uncompressed Payload IP header

5.5.3.10 Header CRC

5.5.3.11 Payload CRC

5.5.3.12 Padding

5.5.3.13 Spare

5.5.3.14 Spare extension Word‑p. 20

5.5.3.15 Payload fields

5.5.3.16 Length of the Nth Packet |R9|

5.5.4 Timers

5.6 Handling of unknown, unforeseen and erroneous protocol data

5.6.1 General

5.6.2 CRC Calculation

5.6.3 Relation between input and output of the Cyclic Redundancy Check Word‑p. 21

$ Change History Word‑p. 22