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TS 43.051

GERAN overall description –
Stage 2

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- - v5.10
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after the TSG Plenary Meetings, the 3GPP produces Word documents and afterwards the ETSI publishes the PDF versions
Rapporteur:   SEBIRE, Guillaume
See also:   GERAN-related TS/TR
This TS defines the stage 2 service description for a GSM/EDGE Radio Access Network (GERAN). It illustrates how the services requested by a GSM/UMTS Core Network are realized by the GERAN.

The main focus of this TS is on functionality related to the Iu interfaces. The aim of this TS is not to describe functionality related to the A and Gb interfaces in details. There is no detailed description of the interfaces towards the core network and only references are given to the appropriate specifications.
full Table of Contents for version:   12.0
 1Scope       p. 8Top
 2References       p. 8
2.1Normative references       p. 8
2.2Informative references       p. 9
 3Symbols and abbreviations       p. 10
3.1Symbols       p. 10
3.2Abbreviations       p. 10
 4GERAN Architecture       p. 11
4.1GERAN Reference Architecture       p. 11
4.2UMTS Architecture applied to GERAN       p. 12
4.3Protocol architecture in PS domain       p. 13
4.3.1General       p. 13
4.3.2User plane       p. 14
4.3.3Control plane       p. 14
4.4Protocol architecture in CS domain       p. 15
4.4.1General       p. 15
4.4.2User plane       p. 15
4.4.3Control plane       p. 15
4.5Iur-g interface       p. 16
4.5.1General principles       p. 16
4.5.2Protocol architecture       p. 17
4.5.3RNSAP protocol       p. 17
4.6Support for MSC/SGSN in pool       p. 18
4.7CS services for GERAN Iu-mode       p. 18
4.8User Equipment Specific Behaviour Information (UESBI) in
GERAN Iu mode       p. 19
 5Radio Interface Protocol Architecture       p. 19
5.1Protocol Structure when connecting through Iu       p. 19
5.2Multiplexing Principles       p. 21
5.2.1Multiplexing of different types of radio access bearers for
one MS       p. 21
5.2.2Multiplexing of user plane data from different core network
interfaces       p. 21
5.3Iu vs A/Gb mode selection       p. 22
5.3.1Introduction       p. 22
5.3.2PLMN, cell and mode (re-)selection in GERAN       p. 22
 6User and Control Plane Protocols       p. 23
6.1Identifiers in GERAN       p. 23
6.1.1IMSI, TMSI and P-TMSI       p. 23
6.1.2G-RNTI       p. 23
6.1.3NSAPI, RAB ID and RB ID       p. 23
6.1.4RB Id, RRB Id, and TFI       p. 24
6.1.5USF       p. 24
6.1.6SAI       p. 24
6.1.7BSC-id       p. 24
6.1.8LAI for 3G core network       p. 24
6.1.9RAI for the 3G core network       p. 25
6.1.10GRA Identity       p. 25
6.1.11GERAN internal Cell Identity       p. 25
6.2Relay       p. 25
6.3Radio Resource Control (RRC)       p. 25
6.3.1RRC Functions       p. 25
6.3.2RRC Connection Levels       p. 26
6.3.3RRC Connection Modes       p. 27
6.3.4RRC Connection Mobility       p. 27 Connection mobility in RRC-Idle mode       p. 27 Connection mobility in RRC-Connected mode       p. 27
6.3.5RRC protocol and messages       p. 28
6.3.6Support of Radio Bearers in GERAN       p. 28
6.4Packet Data Convergence Protocol (PDCP)       p. 28
6.4.1Services provided to upper layers       p. 28
6.4.2Services expected from RLC layer       p. 29
6.4.3PDCP Functions       p. 29 Mode       p. 29 Mode       p. 29
6.5Radio Link Control (RLC)       p. 30
6.5.1Services provided to upper layer       p. 30
6.5.2RLC Functions       p. 30 Mode       p. 30 Mode       p. 30 Mode       p. 30 Mode       p. 31
6.6Medium Access Control (MAC)       p. 31
6.6.1Services provided to upper layers       p. 31
6.6.2MAC Functions       p. 31 functions for RLC transparent mode       p. 32 functions for RLC non-transparent mode       p. 32
6.6.3Model of MAC       p. 32
6.6.4MAC operation       p. 33       p. 33 establishment       p. 34       p. 34 resource request from MAC-Idle state       p. 35 Originated Transmission       p. 35 Terminated Transmission       p. 35 multiplexing and scheduling       p. 36 of RLC instances on TBFs       p. 36 of TBFs on physical-layer resources       p. 36 release       p. 36 reallocation       p. 37
6.7RLC/MAC PDU Formats for different protocol modes       p. 37
6.7.1Acknowledged RLC mode       p. 37
6.7.2Unacknowledged RLC mode       p. 37
6.7.3Transparent RLC mode       p. 37
6.8Physical Layer (Phy)       p. 37
6.8.1Definitions       p. 38
6.8.2Services provided to upper layer       p. 38 services of the physical layer in the MS       p. 38
6.8.3Logical Channels       p. 38 channels       p. 38 channels       p. 39 channels       p. 39 control type channels       p. 39 control channels       p. 39 Broadcast Channel (CBCH)       p. 39
6.8.4Basic Physical Subchannels       p. 40 - Dedicated Basic Physical SubCHannel       p. 40 - Shared Basic Physical SubCHannel       p. 40
6.8.5Mapping of logical channels onto basic physical subchannels       p. 40 full rate       p. 40 half rate       p. 40 full rate       p. 41 half rate       p. 41
6.8.6Physical Layer Functions       p. 42
6.8.7Channel Coding       p. 42
6.6.8Enhanced Power control procedure       p. 44 implementation       p. 45 power control       p. 45 link quality measurement reports       p. 45 implementation       p. 45
6.9Flexible Layer One (FLO)       p. 45
6.9.1General       p. 45
6.9.2Definitions       p. 45
6.9.3Principles       p. 45       p. 45 / multiplexing       p. 46
 7Ciphering       p. 47
7.1Location of ciphering in the GERAN protocol architecture       p. 47
7.2Inputs to the ciphering algorithm       p. 47
7.2.1Ciphering Key       p. 47
7.2.2Bearer       p. 48
7.2.3Direction       p. 48
7.2.4Length       p. 48
7.2.5Parameter Settings       p. 48
 8Integrity protection       p. 49
8.1Integrity protection on RRC messages       p. 49
8.2Integrity protection on RLC/MAC control messages       p. 49
8.3Calculation of message authentication code       p. 49
 9Mobility Management and Session Management (MM and SM)       p. 49Top
 10Sequence Diagrams Examples for Handover       p. 49Top
Annex ARadio Access Bearer Realization       p. 50
A.1Conversational Radio Access Bearer       p. 50
A.2Streaming, Interactive, Background Radio Access Bearers       p. 53
A.2.1Streaming       p. 53
A.2.2Interactive       p. 55
A.2.3Background       p. 56
Annex BRLC/MAC Header format Convention       p. 57
B.1GPRS RLC/MAC data block header       p. 57
B.1.1Downlink RLC/MAC data block header       p. 57
B.1.2Uplink RLC/MAC data block header       p. 57
B.2EGPRS RLC/MAC data block header       p. 57
B.2.1Downlink RLC/MAC data block header       p. 57
B.2.2Uplink RLC/MAC data block header       p. 58
B.3ECSD RLC/MAC data block header       p. 59
B.3.1Uplink and downlink RLC/MAC data block header       p. 59
Annex CRRC States, MAC States and RRC Connection Mobility       p. 61
C.2MAC states       p. 61
C.2.1MAC-Dedicated state       p. 61
C.2.1.1Transition from MAC-Dedicated state to MAC-Idle state       p. 61
C.2.1.2Transition from MAC-Dedicated state to MAC-Shared state       p. 61
C.2.1.3Transition from MAC-Dedicated state to MAC-DTM state       p. 62
C.2.2MAC-Shared state       p. 62
C.2.2.1Transition from MAC-Shared state to MAC-DTM state       p. 62
C.2.2.2Transition from MAC-Shared state to MAC-Idle state       p. 62
C.2.2.3Transition from MAC-Shared state to MAC-Dedicated state       p. 62
C.2.3MAC-Idle state       p. 62
C.2.3.1Transition from MAC-Idle state to MAC-Dedicated state       p. 62
C.2.3.2Transition from MAC-IDLE state to MAC-SHARED state       p. 62
C.2.4MAC-DTM state       p. 62
C.2.4.1Transition from MAC-DTM state to MAC-Dedicated state       p. 62
C.2.4.2Transition from MAC-DTM state to MAC-Shared state       p. 62
C.3Mapping between RRC States and MAC States       p. 63
Annex DChange history       p. 64Top