samblue 2006-8-7 20:33
25323-700-Packet Data Convergence Protocol (PDCP) specification
25323-700-Packet Data Convergence Protocol (PDCP) specification.pdf
Contents
Foreword...........................................................................................................................................................5
1 Scope.......................................................................................................................................................6
2 References...............................................................................................................................................6
3 Definitions and Abbreviations.................................................................................................................6
3.1 Definitions........................................................................................................................................................6
3.2 Abbreviations....................................................................................................................................................7
4 General....................................................................................................................................................8
4.1 Objective...........................................................................................................................................................8
4.2 Overview on sublayer architecture...................................................................................................................8
5 Functions.................................................................................................................................................8
5.1 Header Compression.........................................................................................................................................9
5.1.1 Mapping of PID values...............................................................................................................................9
5.1.2 IP Header Compression (RFC 2507)..........................................................................................................10
5.1.2.1 Context identifiers...............................................................................................................................10
5.1.2.2 Mapping of PID values for RFC 2507..................................................................................................10
5.1.2.3 Management of Full Header transmission............................................................................................10
5.1.3 Robust Header Compression (RFC 3095)..................................................................................................10
5.1.3.1 Context identifiers...............................................................................................................................11
5.1.3.2 Mapping of PID values for RFC 3095 with CIDs in PDCP PDU Header............................................11
5.1.3.3 Mapping of PID values for RFC 3095 with CIDs within ROHC packet format..................................11
5.1.3.4 RFC 3095 Segmentation......................................................................................................................11
5.1.3.5 Protocol Parameters.............................................................................................................................12
5.1.3.6 Configuration by RRC..........................................................................................................................12
5.2 Void................................................................................................................................................................13
5.3 Data Transfer..................................................................................................................................................13
5.3.1 Data transfer over acknowledged mode RLC............................................................................................13
5.3.2 Data transfer over unacknowledged and transparent mode RLC...............................................................13
5.4 SRNS Relocation............................................................................................................................................14
5.4.1 Lossless SRNS Relocation........................................................................................................................14
5.4.1.1 Void.....................................................................................................................................................14
5.4.1.2 Void.....................................................................................................................................................15
5.4.1.3 Void.....................................................................................................................................................15
5.4.2 Context relocation.....................................................................................................................................15
5.5 Lossless DL RLC PDU size change................................................................................................................17
5.6 General procedures.........................................................................................................................................17
5.6.1.1 PDCP Sequence Numbering.................................................................................................................17
5.6.1.2 PDCP Sequence Number synchronization...........................................................................................18
5.6.1.3 Sequence Number and Data Forwarding..............................................................................................18
5.7 Header Compression and Decompression for MBMS.....................................................................................19
5.7.1 Cell change inside the same cell group......................................................................................................19
5.7.2 Cell change between cell groups................................................................................................................19
6 Services.................................................................................................................................................19
6.1 Services provided to upper layers....................................................................................................................19
6.2 Services expected from RLC layer..................................................................................................................19
7 Elements for layer-to-layer communication...........................................................................................20
7.1 Primitives between PDCP and upper layers.....................................................................................................20
8 Elements for peer-to-peer communication.............................................................................................21
8.1 Protocol data units..........................................................................................................................................21
8.2 Formats...........................................................................................................................................................21
8.2.1 PDCP-No-Header PDU.............................................................................................................................22
8.2.2 PDCP Data PDU.......................................................................................................................................22
8.2.3 PDCP SeqNum PDU.................................................................................................................................22 3GPP
Release 7T 4 3GPP TS 25.323 V7.0.0 (2006-03)
8.3 Parameters.......................................................................................................................................................22
8.3.1 PDU Type.................................................................................................................................................23
8.3.2 PID............................................................................................................................................................23
8.3.3 Data...........................................................................................................................................................23
8.3.4 Sequence number......................................................................................................................................23
9 Handling of unknown, unforeseen and erroneous protocol data............................................................23
9.1 Invalid PDU type............................................................................................................................................23
9.2 Invalid PID value............................................................................................................................................24
Annex A (normative): ROHC performance testing....................................................................................25
A.1 Introduction.....................................................................................................................................................25
A.2 Test outline.....................................................................................................................................................25
A.2.1 Test 1a - Base test of ROHC RTP O-mode compressor.............................................................................25
A.2.1.1 Test purpose.........................................................................................................................................25
A.2.1.2 Sequence details..................................................................................................................................25
A.2.1.3 Test requirement..................................................................................................................................26
A.2.2 Test 1b - Base test of ROHC RTP R-mode compressor.............................................................................26
A.2.2.1 Test purpose.........................................................................................................................................26
A.2.2.2 Sequence details..................................................................................................................................26
A.2.2.3 Test requirement..................................................................................................................................27
A.2.3 Test 2a - TTL / Hop-Limit variations in O-mode......................................................................................27
A.2.3.1 Test purpose.........................................................................................................................................27
A.2.3.2 Sequence details..................................................................................................................................27
A.2.3.3 Test requirement..................................................................................................................................27
A.2.4 Test 2b - TTL / Hop-Limit variations in R-mode.......................................................................................27
A.2.4.1 Test purpose.........................................................................................................................................27
A.2.4.2 Sequence details..................................................................................................................................28
A.2.4.3 Test requirement..................................................................................................................................28
A.2.5 Test 3a - Re-establishment TS after DTX in O-mode................................................................................28
A.2.5.1 Test purpose.........................................................................................................................................28
A.2.5.2 Sequence details..................................................................................................................................28
A.2.5.3 Test requirement..................................................................................................................................28
A.2.6 Test 3b - Re-establishment TS after DTX in R-mode................................................................................28
A.2.6.1 Test purpose.........................................................................................................................................28
A.2.6.2 Sequence details..................................................................................................................................28
A.2.6.3 Test requirement..................................................................................................................................29
A.2.7 Test 4a - Compressor response to single lost packets in O-mode..............................................................29
A.2.7.1 Test purpose.........................................................................................................................................29
A.2.7.2 Sequence details..................................................................................................................................29
A.2.7.3 Test requirement..................................................................................................................................29
A.2.8 Test 4b - Compressor response to single lost packets in R-mode..............................................................29
A.2.8.1 Test purpose.........................................................................................................................................29
A.2.8.2 Sequence details..................................................................................................................................29
A.2.8.3 Test requirement..................................................................................................................................29
A.2.9 Test 5a - Compressor response to several packet losses in O-mode..........................................................29
A.2.9.1 Test purpose.........................................................................................................................................29
A.2.9.2 Sequence details..................................................................................................................................30
A.2.9.3 Test requirement..................................................................................................................................30
A.2.10 Test 5b - Compressor response to several packet losses in R-mode..........................................................30
A.2.10.1 Test purpose.........................................................................................................................................30
A.2.10.2 Sequence details..................................................................................................................................30
A.2.10.3 Test requirement..................................................................................................................................30
A.3 Test packet structures......................................................................................................................................31
Annex B (informative): Reference model for generating ROHC performance requirements................34
B.1 Introduction.....................................................................................................................................................34
B.2 For Voice over IP (VoIP) optimisation............................................................................................................34
B.2.1 ROHC parameters optimisations for VoIP.................................................................................................34
B.2.2 Recommended parameters setting for VoIP...............................................................................................34 3GPP
Release 7T 5 3GPP TS 25.323 V7.0.0 (2006-03)
Annex C (informative): Change history.......................................................................................................35