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2.2M
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12.6 Compatibility with GSM Phase 1
.................................................................................................................... 73
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12.7 Protocol interworking
...................................................................................................................................... 73 13 Subsequent channel assignment using a circuit connection between MSC-A and MSC-B...................74
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13.1 GSM handover
................................................................................................................................................. 74
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13.2 UMTS to GSM handover
................................................................................................................................. 75
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13.3 GSM to UMTS handover
................................................................................................................................. 76
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13.4 SRNS Relocation
............................................................................................................................................. 77 ETSI 5 ETSI TS 123 009 V3.2.0 (2000-03) 3G TS 23.009 version 3.2.0 Release 1999
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14 Directed retry handover
.........................................................................................................................78
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15 SDL diagrams
........................................................................................................................................79 Annex A (informative): Change history.............................................................................................212 ETSI 6 ETSI TS 123 009 V3.2.0 (2000-03) 3G TS 2...
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1 Scope
........................................................................................................................................................7
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2 References
................................................................................................................................................7
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3 Abbreviations
...........................................................................................................................................7
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4 General
.....................................................................................................................................................8
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4.2 Overview on sublayer architecture
.................................................................................................................... 8
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4.2.1 Model of RLC
.............................................................................................................................................. 9
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4.2.1.1 Transparent mode entities
..................................................................................................................... 10
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4.2.1.2 Unacknowledged mode entities
............................................................................................................ 11
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4.2.1.3 Acknowledged mode entity
.................................................................................................................. 12
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5 Functions
................................................................................................................................................14
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6 Services provided to upper layers
..........................................................................................................14 6.1 Mapping of services/functions onto logical channels ...................................................................................... 15
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7 Services expected from MAC
................................................................................................................16
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8 Elements for layer-to-layer communication
..........................................................................................17
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8.1 Primitives between RLC and higher layers
...................................................................................................... 17
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9 Elements for peer-to-peer communication
.............................................................................................18
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9.1 Protocol data units
........................................................................................................................................... 18
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9.1.1 Data PDUs
.................................................................................................................................................. 18
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9.1.2 Control PDUs
............................................................................................................................................. 18
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9.2 Formats and parameters
................................................................................................................................... 19
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9.2.1 Formats
....................................................................................................................................................... 19
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9.2.1.1 TrD PDU
.............................................................................................................................................. 19
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9.2.1.2 UMD PDU
............................................................................................................................................ 19
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9.2.1.3 AMD PDU
............................................................................................................................................ 20
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9.2.1.4 STATUS PDU
...................................................................................................................................... 20
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9.2.1.5 Piggybacked STATUS PDU
................................................................................................................ 21
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9.2.1.6 RESET, RESET ACK PDU
................................................................................................................. 21
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9.2.2 Parameters
.................................................................................................................................................. 22 9.2.2.1 D/C field............................................................................................................................................... 22
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9.2.2.2 PDU Type
............................................................................................................................................. 22
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9.2.2.3 Sequence Number (SN)
........................................................................................................................ 22
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9.2.2.4 Polling bit (P)
....................................................................................................................................... 22
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9.2.2.5 Extension bit (E)
................................................................................................................................... 22
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9.2.2.6 Reserved (R)
......................................................................................................................................... 23
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9.2.2.7 Header Extension Type (HE)
............................................................................................................... 23
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9.2.2.8 Length Indicator (LI)
............................................................................................................................ 23
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9.2.2.9 Data
...................................................................................................................................................... 24
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9.2.2.10 Padding (PAD)
..................................................................................................................................... 24
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9.2.2.11 SUFI
..................................................................................................................................................... 24
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9.2.2.11.1 The No More Data super-field
........................................................................................................ 25
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9.2.2.11.2 The Acknowledgement super-field
................................................................................................. 25
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9.2.2.11.3 The Window Size super-field
......................................................................................................... 26
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9.2.2.11.4 The List super-field
......................................................................................................................... 26
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9.2.2.11.5 The Bitmap super-field
................................................................................................................... 26
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9.2.2.11.6 The Relative List super-field
........................................................................................................... 27
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9.2.2.11.7 The Move Receiving Window super-field
...................................................................................... 28
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9.2.2.11.8 The Move Receiving Window and Ignore First LI (MRW_N_IFL) super-field
............................. 28
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9.2.2.13 Reserved (R)
......................................................................................................................................... 28
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9.3 Protocol states
.................................................................................................................................................. 29
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9.3.1 State model for transparent mode entities
.................................................................................................. 29 (3G TS 25.322 version 3.1.2 Release 1999) ETSI TS 125 322 V3.1.2 (2000-01) ETSI 3GPP 3G TS 25.322 V3.1.2 (2000-01) 4 3G TS 25.322 version 3.1.2
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9.3.1.1 Null State
.............................................................................................................................................. 29
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9.3.1.2 Transparent Data Transfer Ready State
................................................................................................ 29
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9.3.2 State model for unacknowledged mode entities
......................................................................................... 29
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9.3.2.1 Null State
.............................................................................................................................................. 29
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9.3.2.2 Unacknowledged Data Transfer Ready State
....................................................................................... 29
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9.3.3 State model for acknowledged mode entities
............................................................................................. 30
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9.3.3.1 Null State
.............................................................................................................................................. 30
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9.3.3.2 Acknowledged Data Transfer Ready State
........................................................................................... 30
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9.3.3.3 Reset Pending State
.............................................................................................................................. 30
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9.3.3.4 Local Suspend State
.............................................................................................................................. 31
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9.4 State variables
.................................................................................................................................................. 31
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9.5 Timers
.............................................................................................................................................................. 33
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9.6 Protocol Parameters
......................................................................................................................................... 34
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9.7 Specific functions
............................................................................................................................................ 35
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9.7.1 Polling function for acknowledged mode transfer
..................................................................................... 35
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9.7.2 STATUS PDU transmission for acknowledged mode
............................................................................... 35
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9.7.3 SDU discard function
................................................................................................................................. 36
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9.7.3.1 Timer based discard, with explicit signalling
....................................................................................... 36
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9.7.3.2 Timer based discard, without explicit signalling
.................................................................................. 37
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9.7.3.3 SDU discard after MaxDAT number of retransmissions
...................................................................... 37
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9.7.4 The Estimated PDU Counter
...................................................................................................................... 37
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9.7.5 Multiple payload units in an RLC PDU
..................................................................................................... 37
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9.7.6 Local Suspend function for acknowledged mode transfer
......................................................................... 37
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10 Handling of unknown, unforeseen and erroneous protocol data
...........................................................38
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11 Elementary procedures
..........................................................................................................................38
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11.1 Transparent mode data transfer procedure
....................................................................................................... 38
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11.1.1 Purpose
....................................................................................................................................................... 38
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11.1.2 Initiation
..................................................................................................................................................... 38
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11.1.2.1 TrD PDU contents to set
....................................................................................................................... 39
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11.1.3 Reception of TrD PDU
............................................................................................................................... 39
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11.1.4 Abnormal cases
.......................................................................................................................................... 39
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11.1.4.1 Undefined SDU size at receiver
........................................................................................................... 39
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11.2 Unacknowledged mode data transfer procedure
.............................................................................................. 39
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11.2.1 Purpose
....................................................................................................................................................... 39
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11.2.2 Initiation
..................................................................................................................................................... 39
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11.2.2.1 UMD PDU contents to set
.................................................................................................................... 39
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11.2.3 Reception of UMD PDU
............................................................................................................................ 40
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11.2.4 Abnormal cases
.......................................................................................................................................... 40
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11.2.4.1 Length Indicator value 1111110
........................................................................................................... 40
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11.2.4.2 Invalid length indicator value
............................................................................................................... 40
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11.3 Acknowledged mode data transfer procedure
.................................................................................................. 40
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11.3.1 Purpose
....................................................................................................................................................... 40
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11.3.2 Initiation
..................................................................................................................................................... 40
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11.3.2.1 AMD PDU contents to set
.................................................................................................................... 41