ETSI TS V ( ) Technical Specification

TS 144 060 V5.21.0 (2009-04) Technical Specification Digital cellular telecommunications system (Phase 2+); General Packet Radio Service (GPRS); Mobile Station (MS) - Base Station System (BSS) interface; Radio Link Control / Medium Access Control (RLC/MAC) protocol (3GPP TS 44.060 version 5.21.0 Release 5) GLOBAL SYSTEM FOR MOBILE COMMUNICATIONS R

1 TS 144 060 V5.21.0 (2009-04) Reference RTS/TSGG-0244060v5l0 Keywords GSM 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association à but non lucratif enregistrée à la Sous-Préfecture de Grasse (06) N 7803/88 Important notice Individual copies of the present document can be downloaded from: http://www.etsi.org The present document may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). In case of dispute, the reference shall be the printing on printers of the PDF version kept on a specific network drive within Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other documents is available at http://portal.etsi.org/tb/status/status.asp If you find errors in the present document, please send your comment to one of the following services: http://portal.etsi.org/chaircor/_support.asp Copyright Notification No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2009. All rights reserved. DECT TM, PLUGTESTS TM, UMTS TM, TIPHON TM, the TIPHON logo and the logo are Trade Marks of registered for the benefit of its Members. 3GPP TM is a Trade Mark of registered for the benefit of its Members and of the 3GPP Organizational Partners. LTE is a Trade Mark of currently being registered for the benefit of its Members and of the 3GPP Organizational Partners. GSM and the GSM logo are Trade Marks registered and owned by the GSM Association.

2 TS 144 060 V5.21.0 (2009-04) Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to. The information pertaining to these essential IPRs, if any, is publicly available for members and non-members, and can be found in SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to in respect of standards", which is available from the Secretariat. Latest updates are available on the Web server (http://webapp.etsi.org/ipr/home.asp). Pursuant to the IPR Policy, no investigation, including IPR searches, has been carried out by. No guarantee can be given as to the existence of other IPRs not referenced in SR 000 314 (or the updates on the Web server) which are, or may be, or may become, essential to the present document. Foreword This Technical Specification (TS) has been produced by 3rd Generation Partnership Project (3GPP). The present document may refer to technical specifications or reports using their 3GPP identities, UMTS identities or GSM identities. These should be interpreted as being references to the corresponding deliverables. The cross reference between GSM, UMTS, 3GPP and identities can be found under http://webapp.etsi.org/key/queryform.asp.

3 TS 144 060 V5.21.0 (2009-04) Contents Intellectual Property Rights...2 Foreword...2 Foreword...13 1 Scope...14 1.1 General...14 1.2 Related documents...14 1.3 Use of logical control channels...14 1.4 Use of logical traffic channels...15 1.5 Conventions...15 2 References...16 3 Definitions, abbreviations and symbols...17 3.1 Definitions...17 3.2 Abbreviations...19 3.3 Symbols...21 4 Layered overview of radio interface...21 4.1 Layer services...22 4.2 Layer functions...22 4.3 Service primitives...23 4.4 Services required from lower layers...23 5 Introduction to the Medium Access Control (MAC) procedures...23 5.1 General...23 5.2 Multiplexing principles...23 5.2.1 Temporary Block Flow...23 5.2.2 Temporary Flow Identity...24 5.2.3 Uplink State Flag...24 5.2.4 Medium Access modes...24 5.2.4a Multiplexing of GPRS and EGPRS TBF mode capable mobile stations...24 5.3 Packet idle mode...25 5.4 Packet transfer mode...25 5.4a Dual transfer mode...25 5.5 General procedures in packet idle and packet transfer modes...26 5.5.1 Mobile station side...26 5.5.1.1 Cell reselection...26 5.5.1.1a Network Assisted Cell Change...27 5.5.1.1a.1 Neighbour Cell System Information Distribution...27 5.5.1.1a.2 CCN Mode...27 5.5.1.1b Release of RR connection...28 5.5.1.1b.1 General...28 5.5.1.1b.2 Continuation of PBCCH information...28 5.5.1.1b.3 Continuation of BCCH information...28 5.5.1.1b.4 Receipt of PSI14 message in dual transfer mode...28 5.5.1.2 System information on PBCCH...29 5.5.1.2.1 Supervision of PBCCH_CHANGE_MARK and update of PBCCH information...29 5.5.1.2.2 Replacement of PBCCH...30 5.5.1.2.3 PSI1 reception failure...30 5.5.1.3 System information on BCCH...30 5.5.1.3.1 Supervision of BCCH_CHANGE_MARK and update of BCCH information...30 5.5.1.3.2 Establishment of PBCCH...31 5.5.1.3.3 SI13 reception failure...31 5.5.1.4 Acquisition of system information on the broadcast channel...31 5.5.1.4.1 Consistent sets of system information messages...32 5.5.1.4.2 Suspension of operation to receive system information...32 5.5.1.4.3 Request for acquisition of system information...32

4 TS 144 060 V5.21.0 (2009-04) 5.5.1.5 Discontinuous reception (DRX)...33 5.5.1.6 Page mode procedures on PCCCH...34 5.5.1.7 Frequency Parameters...35 5.5.1.8 TLLI management...36 5.5.1.9 Packet Flow Context (PFC)...36 5.5.2 Network side...36 5.5.2.1 System Information broadcasting...36 5.5.2.1.1 System information on PBCCH...36 5.5.2.1.2 System information on BCCH...37 5.5.2.1.3 System information on PACCH (and other logical channels)...37 5.5.2.1.3a Rules for (P)SI information distribution within Packet Serving Cell Data messages...38 5.5.2.1.4 Consistent sets of system information messages...39 5.5.2.2 Paging...39 5.5.2.3 Network Assisted Cell Change...39 5.6 Measurement reports...40 5.6.0 General...40 5.6.1 Network Control (NC) measurement reporting...40 5.6.2 Extended measurement (EM) reporting...41 5.6.3 Additional measurement and reporting parameters...42 5.6.3.1 Deriving the 3G Neighbour Cell list from the 3G Neighbour Cell description...42 5.6.3.2 Deriving BA(GPRS) and the GSM Neighbour Cell list...43 5.6.3.3 Deriving the Neighbour Cell list from the GSM Neighbour Cell list and the 3G Neighbour Cell list...43 5.6.3.4 GPRS Real Time Differences...44 5.6.3.5 GPRS Report Priority Descriptions...44 5.6.3.6 GPRS Measurement Parameters and GPRS 3G Measurement Parameters...44 5.6.3.7 The GPRS 3G Cell Reselection list...45 6 Paging procedures...45 6.1 Paging procedure for RR connection establishment...45 6.1.1 Paging initiation using paging subchannel on CCCH...46 6.1.2 Paging initiation using paging subchannel on PCCCH...46 6.1.3 Paging initiation using PACCH...46 6.1.4 Paging response...46 6.2 Paging procedure for downlink packet transfer...46 6.2.1 Paging procedure using paging subchannel on CCCH...47 6.2.2 Paging using paging subchannel on PCCCH...47 6.2.3 Paging response...47 7 Medium Access Control (MAC) procedures on PCCCH...47 7.0 General...47 7.1 TBF establishment initiated by the mobile station on PCCCH...47 7.1.1 Permission to access the network...48 7.1.2 Initiation of a TBF establishment...48 7.1.2.1 Initiation of the packet access procedure...48 7.1.2.1.1 Access persistence control on PRACH...49 7.1.2.2 Packet assignment procedure...50 7.1.2.2.1 On receipt of a PACKET CHANNEL REQUEST or EGPRS PACKET CHANNEL REQUEST message...50 7.1.2.2.1a Acquisition of MS Radio Access Capability information within EGPRS TBF establishment procedure...52 7.1.2.2.2 Packet access queuing notification procedure...52 7.1.2.2.3 Packet polling procedure...53 7.1.2.2.4 Packet access reject procedure...53 7.1.2.3 Contention resolution at one phase access...53 7.1.2.3a RLC/MAC procedures during contention resolution...54 7.1.2.4 One phase packet access completion...55 7.1.2.5 Timing Advance...55 7.1.2.6 PFC procedure at one phase access...55 7.1.3 TBF establishment using two phase access...55 7.1.3.1 Initiation of the Packet resource request procedure...55 7.1.3.2 Packet resource assignment for uplink procedure...56

5 TS 144 060 V5.21.0 (2009-04) 7.1.3.2.1 On receipt of a PACKET RESOURCE REQUEST message...56 7.1.3.3 Contention resolution at two phase access...57 7.1.3.4 Two phase packet access completion...58 7.1.3.5 Timing Advance...58 7.1.4 Abnormal cases...58 7.2 TBF establishment initiated by the network on PCCCH...58 7.2.1 Entering the packet transfer mode...59 7.2.1.1 Packet downlink assignment procedure...59 7.2.1.2 Packet downlink assignment procedure completion...60 7.2.1.3 Packet polling procedure...60 7.2.2 Abnormal cases...60 7.3 Procedure for measurement report sending in packet idle mode...60 7.3.1 Measurement report sending procedure initiated on PCCCH...61 7.3.1.1 On receipt of a PACKET CHANNEL REQUEST message...61 7.3.1.2 On receipt of a PACKET UPLINK ASSIGNMENT message...61 7.3.1.3 On receipt of a PACKET ACCESS REJECT message...61 7.3.1.4 Abnormal cases...62 7.3.2 Measurement report sending procedure initiated on CCCH...62 7.4 Cell Change Order procedures in Packet Idle mode...62 7.4.1 Cell Change Order procedure initiated on PCCCH...62 7.4.2 Cell Change Order procedure initiated on CCCH...63 7.5 Measurement Order procedures in Packet Idle mode...63 7.5.1 Measurement Order procedures initiated on PCCCH...64 7.5.2 Measurement Order procedures initiated on CCCH...64 7.6 Packet Pause procedure...64 7.6.1 Packet pause procedure initiated on PCCCH...64 7.6.1.1 On receipt of a PACKET CHANNEL REQUEST message...65 7.6.1.2 On receipt of a PACKET UPLINK ASSIGNMENT message...65 7.6.1.3 On receipt of a PACKET ACCESS REJECT message...65 7.6.1.4 Abnormal cases...65 7.6.2 Packet pause procedure initiated on CCCH...65 8 Medium Access Control (MAC) Procedures in Packet Transfer Mode...66 8.0 General...66 8.1 Transfer of RLC data blocks...66 8.1.0 Medium access mode...66 8.1.1 Uplink RLC data block transfer...66 8.1.1.1 Dynamic allocation uplink RLC data block transfer...69 8.1.1.1.1 PACCH operation...69 8.1.1.1.2 Resource Reallocation for Uplink...69 8.1.1.1.3 Establishment of Downlink TBF...71 8.1.1.2 Extended Dynamic Allocation uplink RLC data block transfer...72 8.1.1.2.1 Uplink PDCH Allocation...72 8.1.1.2.2 PACCH operation...73 8.1.1.2.3 Neighbour cell power measurements...73 8.1.1.2.4 Shifted USF operation...73 8.1.1.3...(void) 73 8.1.1.3a Exclusive allocation RLC data block transfer...73 8.1.1.3a.1 General...73 8.1.1.3a.2 Radio link failure...74 8.1.1.3a.3 (void)...74 8.1.1.3a.4 PACCH operation...74 8.1.1.3a.5 Resource Reallocation for Uplink...74 8.1.1.3a.5.1 General...74 8.1.1.3a.5.2 Change of service demand...74 8.1.1.3a.5.3 Reallocation of radio resources for an uplink TBF...75 8.1.1.3a.5.4 Rejection of new service demand...75 8.1.1.3a.5.5 Abnormal cases...75 8.1.1.3a.6 Establishment of Downlink TBF...76 8.1.1.3a.6.1 General...76 8.1.1.3a.6.2 Abnormal cases...76 8.1.1.4 Network initiated release of uplink TBF...77

6 TS 144 060 V5.21.0 (2009-04) 8.1.1.5 Abnormal cases...77 8.1.1.6 Change of RLC mode in extended uplink TBF mode...77 8.1.1.6.1 General...77 8.1.1.6.2 Change of RLC mode...78 8.1.1.6.3 Abnormal cases...78 8.1.2 Downlink RLC data block transfer...78 8.1.2.1 Downlink RLC data block transfer...78 8.1.2.1.1 Abnormal cases...79 8.1.2.2 Polling for Packet Downlink Ack/Nack...79 8.1.2.3 (void)...80 8.1.2.4 Resource Reassignment for Downlink...80 8.1.2.4.1 Abnormal cases...81 8.1.2.5 Establishment of uplink TBF...81 8.1.2.5.1 Abnormal cases...82 8.1.2.6 (void)...83 8.1.2.7 (void)...83 8.1.2.8 Network initiated abnormal release of downlink TBF...83 8.1.3 (void)...83 8.2 Packet PDCH Release...83 8.3 Procedure for measurement report sending in Packet Transfer mode...84 8.4 Network controlled cell reselection procedure...84 8.4.1 Network controlled cell reselection completion...85 8.4.1b Network controlled cell reselection completion (UTRAN target Cell)...85 8.4.2 Abnormal cases...85 8.5 Measurement Order procedures in Packet Transfer mode...86 8.6 PACKET CONTROL ACKNOWLEDGEMENT...86 8.7 Abnormal cases...86 8.7.0 General...86 8.7.1 Abnormal release without retry...87 8.7.2 Abnormal release with access retry...87 8.7.3 Abnormal release with system information...87 8.8 Network Assisted Cell Change procedures...87 8.8.1 Neighbour Cell System Information Distribution...87 8.8.2 CCN setting procedure...89 8.8.2a CCN support description...89 8.8.3 Cell Change Notification procedure...89 9 Radio Link Control (RLC) procedures in packet transfer mode...91 9.0 General...91 9.1 Procedures and parameters for peer-to-peer operation...91 9.1.1 Send state variable V(S)...92 9.1.1a Control send state variable V(CS)...92 9.1.2 Acknowledge state variable V(A)...92 9.1.3 Acknowledge state array V(B)...92 9.1.3.1 Acknowledge state array V(B) for GPRS TBF Mode...92 9.1.3.2 Acknowledge State Array V(B) for EGPRS TBF Mode...93 9.1.4 Block sequence number BSN...94 9.1.4.1 Block sequence number BSN for GPRS TBF...94 9.1.4.2 Block sequence number BSN for EGPRS TBF...94 9.1.4a Reduced Block Sequence Number RBSN...94 9.1.5 Receive state variable V(R)...94 9.1.6 Receive window state variable V(Q)...94 9.1.7 Receive state array V(N)...94 9.1.7.1 Receive state array V(N) in GPRS TBF...94 9.1.7.2 Receive state array V(N) in EGPRS TBF...95 9.1.8 Starting sequence number (SSN) and received block bitmap (RBB)...95 9.1.8.1 Starting sequence number (SSN) and received block bitmap (RBB) in GPRS TBF...95 9.1.8.2 Starting sequence number (SSN) and received block bitmap (RBB) in EGPRS TBF...96 9.1.8.2.1 Extended Polling...96 9.1.8.2.2 Determination of SSN...96 9.1.8.2.3 Generation of the bitmap...97 9.1.8.2.4 Interpretation of the bitmap...98

7 TS 144 060 V5.21.0 (2009-04) 9.1.9 Window Size...98 9.1.9.1 GPRS...98 9.1.9.2 EGPRS...98 9.1.10 Compression...99 9.1.11 Segmentation of upper layer PDUs into RLC data units...101 9.1.12 Re-assembly of upper layer PDUs from RLC data units...102 9.1.12a Segmentation of RLC/MAC control messages into RLC/MAC control blocks...102 9.1.12b Re-assembly of RLC/MAC control messages from RLC/MAC control blocks...103 9.1.13 Priority of upper layer PDUs...103 9.2 Operation during RLC/MAC control message transfer...103 9.3 Operation during RLC data block transfer...104 9.3.0 General...104 9.3.1 Countdown procedure...104 9.3.1.1 General...104 9.3.1.2 Non-extended uplink TBF mode...105 9.3.1.3 Extended uplink TBF mode...105 9.3.1a Delayed release of downlink Temporary Block Flow...105 9.3.1b Extended uplink TBF mode...106 9.3.1b.1 Application...106 9.3.1b.2 Operation of uplink TBF in extended uplink TBF mode...106 9.3.2 Acknowledged mode operation...107 9.3.2.0 General...107 9.3.2.1 Additional functionality in acknowledged EGPRS TBF Mode...107 9.3.2.2 Establishment of Temporary Block Flow...108 9.3.2.3 Operation of uplink Temporary Block Flow...108 9.3.2.4 Release of uplink Temporary Block Flow...108 9.3.2.4.1 General...108 9.3.2.4.2 Non-extended uplink TBF mode...109 9.3.2.5 Operation of downlink Temporary Block Flow...110 9.3.2.6 Release of downlink Temporary Block Flow...110 9.3.3 Unacknowledged mode operation...111 9.3.3.0 General...111 9.3.3.1 Establishment of Temporary Block Flow...111 9.3.3.2 Operation of uplink Temporary Block Flow...111 9.3.3.3 Release of uplink Temporary Block Flow...112 9.3.3.3.1 General...112 9.3.3.3.2 Non-extended uplink TBF mode...112 9.3.3.4 Operation of downlink Temporary Block Flow...113 9.3.3.5 Release of downlink Temporary Block Flow...113 9.4 Abnormal release cases...114 9.4.1 Abnormal release with access retry...114 9.4.2 Abnormal release with cell reselection...114 9.5 Uplink TBF release in extended uplink TBF mode...114 10 RLC/MAC block structure...116 10.0a RLC/MAC block structure...116 10.0a.1 GPRS RLC/MAC block for data transfer...116 10.0a.2 EGPRS RLC/MAC block for data transfer...116 10.0a.3 RLC/MAC block for control message transfer...116 10.0b RLC/MAC block format conventions...117 10.0b.1 Numbering convention...117 10.0b.2 Assembling conventions...117 10.0b.2.1 Assembling convention for GPRS RLC data blocks and RLC/MAC control blocks, 11-bit and 8-bit control messages...117 10.0b.2.2 Assembling convention for EGPRS RLC data blocks...117 10.0b.3 10.0b.3.1 Field mapping conventions...117 Field mapping convention for GPRS RLC data blocks, RLC/MAC control blocks, 11-bit and 8-bit control messages...118 10.0b.3.2 Field mapping convention for EGPRS RLC data blocks...118 10.1 Spare bits...118 10.2 GPRS RLC data blocks...118 10.2.1 Downlink RLC data block...118

8 TS 144 060 V5.21.0 (2009-04) 10.2.2 Uplink RLC data block...119 10.3 RLC/MAC control blocks...119 10.3.1 Downlink RLC/MAC control block...119 10.3.2 Uplink RLC/MAC control block...120 10.3a EGPRS RLC data blocks and RLC/MAC headers...120 10.3a.0 General...120 10.3a.1 EGPRS downlink RLC data block...121 10.3a.2 EGPRS Uplink RLC data block...121 10.3a.3 EGPRS Downlink RLC/MAC header...122 10.3a.3.1 Header type 1: header for MCS-7, MCS-8 and MCS-9...122 10.3a.3.2 Header type 2: header for MCS-6 and MCS-5...122 10.3a.3.3 Header type 3: header for MCS-4, MCS-3, MCS-2 and MCS-1 case...123 10.3a.4 EGPRS Uplink RLC/MAC header...123 10.3a.4.1 Header type 1: header for MCS-7, MCS-8 and MCS-9...123 10.3a.4.2 Header type 2: header for MCS-6 and MCS-5...123 10.3a.4.3 Header type 3 : header for MCS-4, MCS-3, MCS-2 and MCS-1...123 10.4 Header fields...124 10.4.1 Uplink state flag (USF) field...124 10.4.2 Retry (R) bit...124 10.4.3 Stall indicator (SI) bit...124 10.4.4 Supplementary/Polling (S/P) Bit...124 10.4.4a EGPRS Supplementary/Polling (ES/P) Field...125 10.4.5 Relative Reserved Block Period (RRBP) field...125 10.4.5.1 Special requirements in dual transfer mode...126 10.4.6 Countdown Value (CV) field...126 10.4.7 Payload Type field...127 10.4.8 Final block indicator (FBI) bit...127 10.4.8a Coding and Puncturing Scheme indicator field (CPS)...127 10.4.8a.1 Header type 1:...128 10.4.8a.2 Header type 2...128 10.4.8a.3 Header type 3...129 10.4.8b Split Block indicator field (SPB)...129 10.4.9 TLLI Indicator (TI) bit...129 10.4.9a Address Control (AC) bit...129 10.4.9b Final Segment (FS) bit...130 10.4.9c Radio Transaction Identifier (RTI) field...130 10.4.9d Direction (D) bit...130 10.4.10 Temporary Flow Identity (TFI) field...130 10.4.10a Power Reduction (PR) field...130 10.4.11 Extension (E) Bit...131 10.4.12 Block Sequence Number (BSN) field...131 10.4.12a Reduced Block Sequence Number (RBSN) bit...131 10.4.13 More (M) bit...131 10.4.14 Length Indicator (LI) field in GPRS TBF mode and DCCH TBF mode (Iu mode)...132 10.4.14a Length Indicator (LI) field in EGPRS TBF mode and TCH TBF mode (Iu mode)...132 10.4.15 TLLI field...133 10.4.16 RLC data field...134 10.4.17 Control message contents field...134 10.4.18 Resent Block Bit (RSB)...134 10.4.19 PFI Indicator (PI) bit...134 10.4.20 Packet Flow Identifier (PFI) field...134 11 Message functional definitions and contents...134 11.1 Handling of erroneous protocol data...135 11.1.1 Message classification...136 11.1.1.1 Distribution messages...136 11.1.1.2 Non-distribution messages...136 11.1.1.2.1 Format of the address information...137 11.1.1.3 DBPSCH message (Iu mode only)...137 11.1.2 Error detection mechanism...137 11.1.3 Error labels...137 11.1.3.1 Generic error labels...138

9 TS 144 060 V5.21.0 (2009-04) 11.1.3.2 'Ignore' error label...138 11.1.3.3 'Message escape' error label...139 11.1.4 Error detection and order of precedence...139 11.1.4.1 Unknown message type...139 11.1.4.2 Message not compatible with current protocol state...139 11.1.4.3 Syntactically incorrect message...139 11.1.4.3.1 Messages with error label: 'Distribution part error'...140 11.1.4.3.2 Messages with error label: 'Address information part error'...140 11.1.4.3.3 Messages with error label: 'Non-distribution part error'...140 11.1.4.3.4 Messages with error label: 'Message escape'...140 11.1.4.3.5 Messages with error label: 'Ignore'...140 11.1.4.3.6 Messages with error label: "DBPSCH message part error"...140 11.1.4.4 Syntactic error in truncated concatenation...140 11.1.4.5 (void)...142 11.2 RLC/MAC control messages...142 11.2.0 Message format...143 11.2.0.1 Downlink RLC/MAC messages...144 11.2.0.2 Uplink RLC/MAC messages...145 11.2.1 Packet Access Reject...145 11.2.2 Packet Control Acknowledgement...146 11.2.2a Packet Cell Change Continue...148 11.2.3 Packet Cell Change Failure...149 11.2.3a Packet Cell Change Notification...151 11.2.4 Packet Cell Change Order...153 11.2.5 Packet Channel Request...160 11.2.5a EGPRS Packet Channel Request...161 11.2.5b Packet DBPSCH Assignment...162 11.2.6 Packet Downlink Ack/Nack...166 11.2.6a EGPRS Packet Downlink Ack/Nack...168 11.2.6b Packet DBPSCH Downlink Ack/Nack...170 11.2.7 Packet Downlink Assignment...171 11.2.7.1 Special requirements in dual transfer mode for downlink TBF...173 11.2.7a Multiple TBF Downlink Assignment (Iu mode only)...174 11.2.8 Packet Downlink Dummy Control Block...176 11.2.8b Packet Uplink Dummy Control Block...177 11.2.9 Packet Measurement Report...177 11.2.9b Packet Measurement Order...181 11.2.9c Packet Mobile TBF Status...194 11.2.9d Packet Enhanced Measurement Report...195 11.2.9e Packet Neighbour Cell Data...196 11.2.10 Packet Paging Request...198 11.2.11 Packet PDCH Release...201 11.2.12 Packet Polling Request...202 11.2.13 Packet Power Control/Timing Advance...203 11.2.14 Packet PRACH Parameters...203 11.2.15 Packet Queueing Notification...204 11.2.16 Packet Resource Request...204 11.2.17 Packet PSI Status...207 11.2.17a Packet Serving Cell Data...208 11.2.17b Packet SI Status...210 11.2.18 Packet System Information Type 1...213 11.2.19 Packet System Information Type 2...215 11.2.19.1 Reference Frequency Lists in PSI2...219 11.2.19.2 Cell Allocation in PSI2...219 11.2.19.3 GPRS Mobile Allocation in PSI2...219 11.2.19.4 PCCCH Description...219 11.2.19.5 Abnormal cases...219 11.2.20 Packet System Information Type 3...219 11.2.21 Packet System Information Type 3 bis...227 11.2.21a... Packet System Information Type 3 ter 232 11.2.21b... Packet System Information Type 3 quater 233 11.2.22 Packet System Information Type 4...236

10 TS 144 060 V5.21.0 (2009-04) 11.2.23 Packet System Information Type 5...237 11.2.23a Packet System Information Type 6...242 11.2.23b Packet System Information Type 7...244 11.2.24 Packet System Information Type 8...244 11.2.25 Packet System Information 13...245 11.2.25a Packet System Information 14...248 11.2.25b Packet System Information 15...250 11.2.25c Packet System Information Type 16...251 11.2.26 Packet TBF Release...253 11.2.27 (void)...254 11.2.28 Packet Uplink Ack/Nack...254 11.2.28a Packet DBPSCH Uplink Ack/Nack...257 11.2.29 Packet Uplink Assignment...258 11.2.29.1 Special requirements in dual transfer mode for uplink TBF...264 11.2.29a Multiple TBF Uplink Assignment (Iu mode only)...264 11.2.30 (void)...269 11.2.30a Packet Pause...269 11.2.31 Packet Timeslot Reconfigure...269 11.2.31.1 Special requirements in dual transfer mode...274 11.2.31a Multiple TBF Timeslot Reconfigure (Iu mode only)...274 11.2.32 Additional MS Radio Access Capabilities...278 11.2.33 Handover Access (Iu mode only)...279 11.2.34 Physical Information (Iu mode only)...279 12 Information element coding...280 12.1 Overview...280 12.2 (void)...280 12.3 Ack/Nack Description...280 12.3.1 EGPRS Ack/Nack Description...281 12.4 (void)...283 12.5 EGPRS...283 12.5.1 EGPRS Channel Quality Report...283 12.5.2 EGPRS Window Size...283 12.5.3 EGPRS BEP Link Quality Measurements IE...284 12.5.4 EGPRS Timeslot Link Quality Measurements IE...285 12.6 (void)...286 12.7 Channel Request Description...286 12.7a Iu mode Channel Request Description...287 12.8 Frequency Parameters...288 12.8.1 Abnormal cases...289 12.9 Global Power Control Parameters...289 12.10 Global TFI...290 12.10a GPRS Mobile Allocation...291 12.10a.1 Abnormal cases...292 12.10b (void)...293 12.10c (void)...293 12.10d EGPRS Modulation and coding Scheme description...293 12.10e RESEGMENT description...293 12.11 Packet Request Reference...293 12.12 Packet Timing Advance...294 12.12a Global Packet Timing Advance...295 12.12b Packet Extended Timing Advance...295 12.13 Power Control Parameters...296 12.14 PRACH Control Parameters...297 12.15 Temporary Flow Identity (TFI)...298 12.16 Temporary Logical Link Identity (TLLI)/G-RNTI...299 12.16a GERAN Radio Network Temporary Identity (G-RNTI)...299 12.17 Temporary Queueing Identifier (TQI)...299 12.18 TIMESLOT_ALLOCATION...300 12.19 (void)...300 12.20 PAGE_MODE...300 12.21 Starting Frame Number Description...300

11 TS 144 060 V5.21.0 (2009-04) 12.21.1 Absolute Frame Number Encoding...300 12.21.2 Relative Frame Number Encoding...301 12.22 (void)...301 12.23 Cell Identification...301 12.24 GPRS Cell Options...302 12.25 PCCCH Organization Parameters...305 12.26 Extension Bits IE...305 12.27 Non GPRS Cell Options IE...306 12.28 LSA Parameters...307 12.29 COMPACT reduced MA...307 12.30 MS Radio Access Capability 2...308 13 Timers and counters...309 13.1 Timers on the Mobile Station side...310 13.2 Timers on the network side...316 13.3 Counters on the Mobile Station side...317 13.4 Counters on the Network side...317 Annex A (informative): Bibliography...318 Annex B (informative): RLC data block encoding...319 B.1 Example 1...319 B.2 Example 2...320 B.3 Example 3...320 B.4 Example 4...321 B.5 Example 5...321 B.6 Example 6...321 B.7 Example 7...322 B.8 RLC data block delimitation for EGPRS...323 B.8.1 Example 1...323 B.8.2 Example 2...324 B.8.3 Example 3...325 Annex C (informative): Message Sequence Diagrams...326 Annex D (informative): (void)...327 Annex E (informative): (void)...328 Annex F (informative): Examples of Countdown procedure operation...329 F.1 Example 1...329 F.2 Example 2...329 F.3 Example 3...330 Annex G (informative): Handling of erroneous protocol data, examples...331 G.1 Application of error labels...331 G.2 Application of the 'Message escape' error label...331 G.3 Application of truncated concatenation including 'padding bits'...332 G.4 Message extension using 'padding bits'...333 G.5 Message extension using the Extension Bits IE...333 Annex H (informative): (void)...335 Annex I (informative): EGPRS RLC Window Sizes...336 Annex J (informative): An example of MCS-8 retransmission...337 J.1 Original MCS-8 RLC data block...337 J.2 Retransmission in two MCS-6 RLC data blocks...338 J.3 Retransmission in four MCS-3 RLC data blocks...339 Annex K (informative): Change History...341 History...344

12 TS 144 060 V5.21.0 (2009-04)

13 TS 144 060 V5.21.0 (2009-04) Foreword This Technical Specification has been produced by the 3 rd Generation Partnership Project (3GPP). The contents of the present document are subject to continuing work within the TSG and may change following formal TSG approval. Should the TSG modify the contents of the present document, it will be re-released by the TSG with an identifying change of release date and an increase in version number as follows: Version x.y.z where: x the first digit: 1 presented to TSG for information; 2 presented to TSG for approval; 3 or greater indicates TSG approved document under change control. y the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections, updates, etc. z the third digit is incremented when editorial only changes have been incorporated in the document.

14 TS 144 060 V5.21.0 (2009-04) 1 Scope 1.1 General This document specifies procedures for the following layers of the radio interface (Um reference point), the interface between the GSM/EDGE Radio Access Network (GERAN) and the Mobile Station (MS): - Radio Link Control (RLC) - Medium Access Control (MAC), including Physical Link Control functions The procedures apply in A/Gb mode. Unless otherwise stated, the procedures also apply in Iu mode. 1.2 Related documents The following documents provide information related to this document: - 3GPP TS 43.064 contains an overview of the GPRS radio interface (Um reference point). - 3GPP TS 44.003 specifies channel types, access capabilities and channel configurations at the Um reference point. - 3GPP TS 44.004 specifies services offered by the physical layer of the Um reference point. It also specifies control channels. RLC and MAC use these services and control channels. - 3GPP TS 24.007 specifies, in general terms, this protocol's structured functions, its procedures and its relationship with other layers and entities. It also specifies the basic message format and error handling applied by layer 3 protocols. - 3GPP TS 44.018 specifies GPRS procedures when operating on the Common Control Channel (CCCH) or on dedicated channels. - 3GPP TS 44.064 specifies the Logical Link Control (LLC) layer. - 3GPP TS 43.051 is an overall description of the GSM/EDGE Radio Access Network (GERAN) in Iu mode. - 3GPP TS 44.160 specifies RLC/MAC procedures specific to Iu mode. - 3GPP TS 51.010 specifies test procedures for radio-interface signalling. 1.3 Use of logical control channels 3GPP TS 45.002 defines three similar sets of logical control. The first set consists of the following logical control channels: - Broadcast Control Channel (BCCH): downlink only, used to broadcast Cell specific information; - Paging Channel (PCH): downlink only, used to send page requests to Mobile Stations (MSs); - Random Access Channel (RACH): uplink only, used to request GPRS resources or a Dedicated Control Channel; - Access Grant Channel (AGCH): downlink only, used to allocate GPRS resources or a Dedicated Control Channel; The second set consists of the following logical control channels (Packet Control Channels): - Packet Broadcast Control Channel (PBCCH): downlink only, used to broadcast Cell specific information; - Packet Paging Channel (PPCH): downlink only, used to send page requests to Mobile Stations (MSs);

15 TS 144 060 V5.21.0 (2009-04) - Packet Random Access Channel (PRACH): uplink only, used to request GPRS resources; - Packet Access Grant Channel (PAGCH): downlink only, used to allocate GPRS resources; - Packet Associated Control Channel (PACCH): bi-directional, associated with a Temporary Block Flow (TBF); - Packet Timing advance control channel uplink (PTCCH/U): used to transmit random access bursts to allow estimation of the timing advance for one MS in transfer state; - Packet Timing advance control channel downlink (PTCCH/D): used to transmit timing advance updates for several MS. One PTCCH/D is paired with several PTCCH/U's. The third set consists of the following logical control channels (COMPACT control channels): - COMPACT Packet Broadcast Control Channel (CPBCCH): downlink only, used to broadcast Cell specific information; This channel broadcasts the same information as the PBCCH, but has a different physical structure (see 3GPP TS 45.002); - COMPACT Packet Paging Channel (CPPCH): downlink only, used to send page requests to Mobile Stations (MSs) on a COMPACT control channel;; - COMPACT Packet Random Access Channel (CPRACH): uplink only, used to request GPRS resources on a COMPACT control channel; - COMPACT Packet Access Grant Channel (CPAGCH): downlink only, used to allocate GPRS resources on a COMPACT control channel; - Packet Associated Control Channel (PACCH): see above; - Packet Timing advance control channel uplink (PTCCH/U): see above; - Packet Timing advance control channel downlink (PTCCH/D): see above. 1.4 Use of logical traffic channels 3GPP TS 45.002 defines the following logical traffic channels used by RLC and MAC: - Traffic Channel (TCH): bidirectional, carries encoded speech or user data using GMSK on a dedicated basic physical subchannel (DBPSCH). TCH can be full-rate (TCH/F) or half-rate (TCH/H). - Octal Traffic Channel (O-TCH): bidirectional, carries encoded speech using 8-PSK on a DBPSCH. O-TCH can be full-rate (O-TCH/F) or half-rate (O-TCH/H). - Enhanced Traffic Channel (E-TCH): bidirectional, carries user data using 8-PSK on a DBPSCH. - Packet Data Traffic Channel (PDTCH): downlink or uplink, carries user data using GMSK or 8-PSK on a shared basic physical subchannel (SBPSCH) or a DBPSCH. PDTCHs can be full-rate (PDTCH/F) or half-rate (PDTCH/H). 1.5 Conventions Unless explicitly stated otherwise, the following conventions apply: - The notations "further study", "FS" or "FFS" indicate the annotated text is not normative. - "GPRS" refers to "GPRS and EGPRS". - "PBCCH" refers to "PBCCH and CPBCCH". - "PPCH" refers to "PPCH and CPPCH". - "PRACH" refers to "PRACH and CPRACH". - "PAGCH" refers to "PAGCH and CPAGCH".

16 TS 144 060 V5.21.0 (2009-04) - References to "PDCH" also apply to "SBPSCH" and vice-versa. 2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present document. References are either specific (identified by date of publication, edition number, version number, etc.) or non-specific. For a specific reference, subsequent revisions do not apply. For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document. [1] 3GPP TR 21.905: "Vocabulary for 3GPP Specifications". [2] 3GPP TS 22.060: "General Packet Radio Service (GPRS); Service Description; Stage 1". [3] 3GPP TS 23.003: "Numbering, addressing and identification". [4] 3GPP TS 43.013: "Discontinuous Reception (DRX) in the GSM system". [5] 3GPP TS 43.064: " Overall description of GPRS radio interface; Stage 2". [6] 3GPP TS 24.002: "GSM - UMTS Public Land Mobile Network (PLMN) access reference configuration". [7] 3GPP TS 44.003: "Mobile Station - Base Station System (MS-BSS) interface; Channel structures and access capabilities". [8] 3GPP TS 44.004: "Layer 1; General requirements". [9] 3GPP TS 44.005: "Data Link (DL) layer; General aspects". [10] 3GPP TS 24.007: "Mobile radio interface signalling layer 3; General aspects". [11] 3GPP TS 44.018: "Mobile radio interface layer 3 specification; Radio Resource Control Protocol". [12] 3GPP TS 44.064: " Mobile Station - Serving GPRS Support Node (MS-SGSN) Logical Link Control (LLC) Layer Specification [13] 3GPP TS 45.002: "Multiplexing and multiple access on the radio path". [14] 3GPP TS 45.003: "Channel coding". [15] 3GPP TS 45.008: "Radio subsystem link control". [16] 3GPP TS 45.010: "Radio subsystem synchronization". [17] (void) [18] (void). [19] 3GPP TS 23.060: "General Packet Radio Service (GPRS); Service Description; Stage 2". [20] 3GPP TS 25.331: "Radio Resource Control (RRC) protocol specification". [21] 3GPP TS 25.133: "Requirements for support of radio resource management (FDD)". [22] 3GPP TS 25.123: "Requirements for support of radio resource management (TDD)". [23] ITU-T Recommendation T.4: "Standardization of Group 3 facsimile terminals for document transmission".

17 TS 144 060 V5.21.0 (2009-04) [24] 3GPP TS 22.011: "Service accessibility". [25] 3GPP TS 25.101: "UE Radio Transmission and Reception (FDD)". [26] 3GPP TS 25.102: "UTRA (UE) TDD; Radio transmission and reception". [27] 3GPP TS 25.213: "Spreading and modulation (FDD)". [28] 3GPP TS 25.223: "Spreading and modulation (TDD)". [29] 3GPP TS 25.304: "UE Procedures in Idle Mode and Procedures for Cell Reselection in Connected Mode". [30] 3GPP TS 45.005: "Radio transmission and reception". [31] 3GPP TS 45.009: "Link adaptation". [32] TIA/EIA-IS-2000-5-A: "CDMA 2000 Series". [33] 3GPP TS 51.010-1: "Mobile Station (MS) conformance specification; Part 1: Conformance specification ". [34] 3GPP TS 51.010-2: "Mobile Station (MS) conformance specification; Part 2: Protocol Implementation Conformance Statement (ICS); proforma specification". [35] 3GPP TS 51.010-3: "Mobile Station (MS) conformance specification; Part 3: Layer 3 Abstract Test Suite (ATS)". [36] 3GPP TS 51.010-4: "Mobile Station (MS) conformance specification; Part 4: SIM application toolkit conformance specification". [37] 3GPP TS 51.021: "Base Station System (BSS) equipment specification; Radio aspects". [38] 3GPP TS 43.051: "GSM/EDGE Radio Access Network (GERAN); Overall Description Stage 2". [39] 3GPP TS 44.160: "Mobile Station (MS) - Base Station System (BSS) interface; Radio Link Control/ Medium Access Control (RLC/MAC) protocol in Iu mode". [40] Michel MOULY, "CSN.1 Specification, Version 2.0", Cell & Sys, ISBN: 2-9510062-0-9. Web: http://perso.wanadoo.fr/cell.sys/. [41] 3GPP TS 25.224: "Physical Layer Procedures (TDD)". 3 Definitions, abbreviations and symbols 3.1 Definitions This document uses the following definitions: A/Gb mode: mode of operation of the MS when connected to the Core Network via GERAN and the A and/or Gb interfaces. Block period: block period is the sequence of four timeslots on a PDCH used to convey one radio block Cell Change Notification (CCN): See sub-clause 5.5.1.1a. Dual transfer mode: In dual transfer mode, the mobile station is allocated radio resources providing an RR connection (3GPP TS 44.018) and a Temporary Block Flow on one or more packet data physical channels. The allocation of radio resource for the RR connection and the Temporary Block Flow is co-ordinated by the network in agreement with the capabilities of the mobile station in dual transfer mode.

18 TS 144 060 V5.21.0 (2009-04) EGPRS: Enhanced GPRS enables higher data rates through usage of 8PSK modulation in addition to GMSK. EGPRS also enables Incremental Redundancy operation. EGPRS TBF mode: refers to a TBF utilising the EGPRS enhancements, e.g. Incremental Redundancy and possibly 8- PSK. EGPRS-GMSK only TBF mode: refers to a TBF in EGPRS TBF mode but making only use of MCS-1 to MCS-4 modulation and coding schemes. The number of PDCHs allocated to an EGPRS-GMSK only TBF can be extended to the maximum number of timeslots compatible with the GPRS multislot class of the MS. This mode is determined by the mobile station based on the aggregate timeslot allocation assigned by the network. In the case the aggregate timeslot allocation is not within the indicated EGPRS multislot class, but is within the indicated GPRS multislot class, a mobile station supporting this mode shall consider the TBF to be in EGPRS-GMSK only mode (see sub-clause 9.1.9.2). This mode is only applicable in packet transfer mode. Extended uplink TBF mode: In the extended uplink TBF mode, the uplink TBF may be maintained during temporary inactive periods, where the mobile station has no RLC information to send. The network determines the release of the uplink TBF (see sub-clause 9.3.1b). MS multislot class: refers to GPRS multislot class in case of a GPRS TBF mode or EGPRS-GMSK only TBF mode. In case of EGPRS TBF mode, MS multislot class refers to EGPRS multislot class. GPRS multislot class / EGPRS multislot class: refers to the different mobile station capabilities to transmit and receive on different combinations of multiple PDCHs. The multislot classes are defined in 3GPP TS 45.002. Note that the mobile station may indicate different multislot classes for circuit mode services for GPRS and for EGPRS (see 3GPP TS 24.008). Different multislot class mobile stations are capable of supporting different medium access modes (see sub-clause 5.2.4). GPRS TBF mode: a TBF not utilising EGPRS enhancements. IR: Incremental redundancy, enables higher data rates through combining information from different transmissions of RLC data blocks when decoding. Also known as Hybrid Type II/III ARQ. Iu mode: mode of operation of the MS when connected to the Core Network via GERAN or UTRAN and the Iu interface. MAC-dedicated state: a MAC-control-entity state where a DBPSCH is assigned and no SBPSCH is assigned. This state only applies in Iu mode. MAC-DTM state: a MAC-control-entity state where at least one DBPSCH and one SBPSCH are assigned. This state only applies in Iu mode. MAC-idle state: a MAC-control-entity state where no basic physical subchannels are assigned. This state only applies in Iu mode. MAC-shared state: a MAC-control-entity state where at least one SBPSCH is assigned. This state only applies in Iu mode. MCS: Modulation and Coding Scheme. Non-extended uplink TBF mode: Where a distinction is needed, an uplink TBF, not operating in the extended uplink TBF mode, is referred as operating in the non-extended uplink TBF mode. Packet flow context: Packet Flow Context (PFC) procedures are described in 3GPP TS 23.060. A Packet Flow Identifier (PFI) is used to identify a PFC. Packet idle mode: In packet idle mode, the mobile station is prepared to transfer LLC PDUs on packet data physical channels (see sub-clause 5.3). The mobile station is not allocated any radio resource on a packet data physical channel; it listens to the PBCCH and PCCCH or, if those are not provided by the network, to the BCCH and the CCCH. Packet transfer mode: In packet transfer mode, the mobile station is prepared to transfer LLC PDUs on packet data physical channels (see sub-clause 5.4). The mobile station is allocated radio resource on one or more packet data physical channels for the transfer of LLC PDUs. Radio block: A radio block is the sequence of four normal bursts carrying one RLC/MAC protocol data units (see 3GPP TS 44.004). (The one exception is a radio block occasionally used on PACCH consisting of a sequence of four access bursts, each carrying a repetition of one short RLC/MAC block.)

19 TS 144 060 V5.21.0 (2009-04) Random values: In a number of places in this Technical Specification, it is mentioned that some value must take a 'random' value, in a given range, or more generally with some statistical distribution. For such random values refer to 3GPP TS 44.018. RLC/MAC block: A RLC/MAC block is the protocol data unit exchanged between RLC/MAC entities (see clause 10 and 3GPP TS 44.004). RLC/MAC control block: A RLC/MAC control block is the part of an RLC/MAC block carrying a control message between RLC/MAC entities (see sub-clause 10.3). RLC data block: A RLC data block is the part of a RLC/MAC block carrying user data or upper layers" signalling data (see sub-clause 10.2). RR connection: An RR connection is a physical connection established between a mobile station and the network to support the upper layers" exchange of information flows. An RR connection is maintained and released by the two peer entities. RRC connection: An RRC connection is a point-to-point, bi-directional, logical connection between RRC peer entities in the mobile station and the GERAN characterised by the allocation of a G-RNTI. A mobile station has either zero or one RRC connections. RRC connections only apply in Iu mode. TBF abort: The term 'abort' as applied to TBF is used when the TBF is abruptly stopped without using the Release of TBF procedures defined in clause 9. TBF release: The term 'release' as applied to TBF is used when the TBF is stopped using one of the Release of TBF procedures defined in clause 9. Temporary Block Flow (TBF): A Temporary Block Flow is, in A/Gb mode, a physical connection used by the two RR peer entities to support the unidirectional transfer of LLC PDUs on packet data physical channels (see sub-clause 5.2.1). In Iu mode, a TBF is a logical connection offered by two MAC entities to support the unidirectional transfer of RLC PDUs on basic physical subchannels. Timer Expiry: A started timer has run the time specified. Timer Restart: A timer that may already be running is stopped and then started again to run the time specified. Timer Start: A timer is started to run the time specified. Timer Stop: A started timer is stopped and its value is then undefined. Uplink control timeslot: refers to the timeslot number of the timeslot where the PACCH/U for the MS is located. This parameter is set to the value of the Uplink Control timeslot IE in an assignment message. Otherwise, this parameter is unassigned. Uplink State Flag (USF): The Uplink State Flag (USF) is used on PDCH channel(s) to allow multiplexing of uplink Radio blocks from different mobile stations (see sub-clause 5.2.3, clause 10 and 3GPP TS 45.002). Upper-layer PDU: An upper-layer PDU is, in A/Gb mode, an LLC PDU and, in Iu mode, an RRC message, a PDCP PDU or a PDU from the NAS user plane. 3.2 Abbreviations This document uses abbreviations from 3GPP TR 21.905 and 3GPP TS 43.064. It also uses the following abbreviations: ARI ARQ AS BCCH BSS CBCH CC CCCCH CCCH CCN Access Request Identifier Automatic Repeat request Access Stratum Broadcast Control CHannel Base Station Subsystem Cell Broadcast CHannel Call Control COMPACT CCCH Common Control CHannel Cell Change Notification

20 TS 144 060 V5.21.0 (2009-04) CN CPBCCH CS-i DC DLC DBPSCH ECSD EDGE E-FACCH EGPRS E-TCH FACCH GC GERAN GPRS GRA G-RNTI GSM IETF IMSI IP LCS LLC MAC MCS-i MM MS NAS NSAPI Nt O-FACCH O-TCH PBCCH PDCH PDCP PDP PDTCH PDU PFC PFI PLMN PTCCH P-TMSI QoS RAB RANAP RB RLC RNC RNS RNSAP ROHC RR RRC RTP SACCH SAP SAPI SDCCH SDU SBPSCH TBF Core Network COMPACT PBCCH GPRS Coding Scheme i Dedicated Control Data Link Control Dedicated Basic Physical Sub CHannel Enhanced Circuit Switched Data Enhanced Data rates for Global Evolution Enhanced FACCH Enhanced General Packet Radio Service Enhanced TCH Fast Associated Control CHannel General Control GSM/EDGE Radio Access Network General Packet Radio Service GERAN Registration Area GERAN Radio Network Temporary Identity Global System for Mobile communications Internet Engineering Task Force International Mobile Subscriber Identity Internet Protocol LoCation Services Logical Link Control Medium Access Control EGPRS Modulation and Coding Scheme i Mobility Management Mobile Station Non Access Stratum Network-layer SAPI Notification Octal FACCH Octal TCH Packet BCCH Packet Data CHannel Packet Data Convergence Protocol Packet Data Protocol Packet Data TCH Protocol Data Unit Packet Flow Context Packet Flow Identifier Public Land Mobile Network Packet Timing-advance Control CHannel Packet TMSI Quality of Service Radio Access Bearer Radio Access Network Application Part Radio Bearer Radio Link Control Radio Network Controller Radio Network Subsystem Radio Network Subsystem Application Part Robust Header Compression Radio Resource Radio Resource Control Real Time Protocol Slow Associated Control CHannel Service Access Point Service Access Point Identifier Stand-alone Dedicated Control CHannel Service Data Unit Shared Basic Physical Sub CHannel Temporary Block Flow

21 TS 144 060 V5.21.0 (2009-04) TCH TCP TLLI TMSI UDP UMTS USF UTRAN Traffic Channel Transmission Control Protocol Temporary Logical Link Identifier Temporary Mobile Subscriber Identity User Datagram Protocol Universal Mobile Telecommunication System Uplink State Flag UMTS Terrestrial Radio Access Network 3.3 Symbols This document uses the following symbols: A Gb Iu Iu-cs Iu-ps Iur-g Um Interface between a BSS and a 2G MSC Interface between a BSS and a 2G SGSN Interface between a BSS or an RNC and a 3G MSC or a 3G SGSN Interface between a BSS or an RNC and a 3G MSC Interface between a BSS or an RNC and a 3G SGSN Interface between two BSSs or between a BSS and an RNC Interface between an MS and the GERAN 4 Layered overview of radio interface The Radio Resource sublayer provides the functions necessary for: - Radio Resource (RR) management of packet data physical channels (PDCHs); and - Radio Link Control and Medium Access Control (RLC/MAC) on packet data physical channels. As shown in figure 4.1, the RR sublayer provides services to the MM and LLC sublayers. The RR sublayer utilises the services of the Data Link layer (signalling layer 2) and the Physical Link layer. The packet logical channels PBCCH, PCCCH (including PPCH, PAGCH and PRACH), PACCH and PDTCH, are multiplexed onto the packet data physical channels on a per radio block basis.

22 TS 144 060 V5.21.0 (2009-04) MM sublayer LLC sublayer RR-SAP GMMRR-SAP GRR-SAP RR sublayer RR management non-rr PD RR RR upper layers' PDUs RLC/MAC PCCCH PDTCH PBCCH PACCH SAPI 0 SAPI 3 BCCH RACH PCH SDCCH FACCH AGCH SACCH SDCCH SACCH Data Link layer (signalling layer 2) PDCH Physical Link layer Figure 4.1: Protocol architecture of Radio Resource (RR) sublayer and RLC/MAC function 4.1 Layer services The RR sublayer provides services for the transfer of upper layer PDUs using a shared medium between multiple mobile stations and the network. Direct communication is only possible between the network and one or more mobile stations. The RLC/MAC function supports two modes of operation: - unacknowledged operation; and - acknowledged operation. The RR sublayer further provides services for the paging of mobile stations. 4.2 Layer functions The RLC function defines the procedures for segmentation and reassemble of LLC PDUs into RLC/MAC blocks and, in RLC acknowledged mode of operation, for the Backward Error Correction (BEC) procedures enabling the selective retransmission of unsuccessfully delivered RLC/MAC blocks. In RLC acknowledged mode of operation, the RLC function preserves the order of higher layer PDUs provided to it. The RLC function provides also link adaptation. In EGPRS in RLC acknowledged mode of operation, the RLC function may provide Incremental Redundancy (IR).

23 TS 144 060 V5.21.0 (2009-04) The MAC function defines the procedures that enable multiple mobile stations to share a common transmission medium, which may consist of several physical channels. The function may allow a mobile station to use several physical channels in parallel, i.e. use several timeslots within the TDMA frame. For the mobile station originating access, the MAC function provides the procedures, including the contention resolution procedures, for the arbitration between multiple mobile stations simultaneously attempting to access the shared transmission medium. For the mobile station terminating access, the MAC function provides the procedures for queuing and scheduling of access attempts. 4.3 Service primitives Information flow between layers is performed by the use of Service Primitives. Service Access Points (SAP) and their corresponding Service Primitives for the RR sublayer are defined in 3GPP TS 24.007. 4.4 Services required from lower layers The RLC/MAC function uses the services provided by the physical link layer as defined in 3GPP TS 44.004. The RR sublayer may use the services provided by the data link layer as defined in 3GPP TS 44.005. Moreover, the RR sublayer directly uses services provided by the physical layer such as BCCH searching, as defined in 3GPP TS 44.004. 5 Introduction to the Medium Access Control (MAC) procedures 5.1 General The Medium Access Control procedures include the functions related to the management of the shared transmission resources, e.g. the packet data physical channels and the radio link connections on packet data physical channels. The Medium Access Control procedures support the provision of Temporary Block Flows (TBFs) that allow the pointto-point transfer of signalling and user data within a cell between the network and a mobile station. Moreover, the Medium Access Control procedures include the procedures for reception of PBCCH and PCCCH, which permits autonomous cell reselection performed by the mobile station (see 3GPP TS 45.008). 5.2 Multiplexing principles 5.2.1 Temporary Block Flow A Temporary Block Flow (TBF) is a physical connection used by the two RR entities to support the unidirectional transfer of upper layer PDUs on packet data physical channels. The TBF is allocated radio resources on one or more PDCHs and comprises a number of RLC/MAC blocks carrying one or more upper layer PDUs. A TBF is temporary and is maintained only for the duration of the data transfer (i.e. until there are no more RLC/MAC blocks to be transmitted and, in RLC acknowledged mode, all of the transmitted RLC/MAC blocks have been successfully acknowledged by the receiving entity). A TBF may operate in either GPRS or EGPRS TBF mode. The network sets the TBF mode in the PACKET UPLINK ASSIGNMENT, PACKET DOWNLINK ASSIGNMENT or IMMEDIATE ASSIGNMENT message. The EGPRS TBF mode is only supported by EGPRS capable MSs. If an MS is assigned concurrent TBFs, these shall be in the same TBF mode.