S05 3G RPLS2_v2-0 RRC Connection Establishment

1 © NOKIA topic: RRC Connection Establishment/ July 2003 /Markus Wimmer

RRC Connection Establishment


Part IRadio Resource Control


RRC Procedures

Node B

UTRANRRC Procedures

UE

RNC

Measurement Procedures• Measurement Control• Measurement Report• etc.

RRC Connection Mobility Procedures

• Cell and URA update• UTRAN mobility information• Active set update• Hard handover• Inter-RAT cell reselection to

UTRAN• etc.

RRC Connection ManagementProcedures

• Broadcast of system information• Paging• RRC connection establishment• UE capability inquiry• Security mode control• Inter-RAT handover information

transfer• etc.

Radio Bearer ControlProcedures

• Radio bearer establishment• Transport channel reconfiguration• Physical channel reconfiguration• etc.

TS 25.331


RRC Message Structure

Node B

UTRANRRC Message

UE

RNCCN IEs

UTRAN Mobility Management IEs

UE IEs

Radio Bearer IEs

Transport Channel IEs

Physical Channel IEs

Measurement IEs

Other IEs



Node BUE RNC

[RACH] RRC Connection Request

[DCH] RRC Connection Setup Complete

[FACH] RRC Connection Setup

Radio Link Setup

L1 Synchronisation

accepted

[RACH] RRC Connection Request

[FACH] RRC Connection Reject

UE RNC

rejected


Part IIRRC Connection Request



UERNC

RRC Connection Request ( )

UE IEs

Measurement IEs

Initial UE identity

Establishment cause

Protocol errorindicator

IMSI

TMSI & LAI

P-TMSI & RAI

IMEI

CHOICE

TRUE / FALSE(default: FALSE)

Originating Conversational Call,Originating Background Call,Terminating Streaming Call,

Emergency Call,Inter-RAT cell reselection,

Registration,Detach,

Originating High Priority Signalling,

Call reestablishment,Terminating Low Priority

Signalling,

e.g.


Part IIIRRC Connection Setup



UERNC

RRC Connection Request ( )

UE IEs

Measurement IEsMeasurement

results forcurrent cell

Measurementresults for

monitored cells

if FDD: measurement quantity(CPICH Ec/No / CPICH RSCP/Pathloss)

up to 8

SFN – SFN observed

time difference

if FDD

P-CPICH info

Measurementquantity

Primaryscramblingcode0..511

Measured Resultson the RACH


RRC Connection Setup message

UERNC

RRC Connection Setup ( )

UE IEs

RB IEs

TrCH IEs: UL/DL

PhyCH IEs: UL/DL


RRC Connection Setup message: UE IEs

UERNC


UE IEs

RB IEs

TrCH IEs: UL/DL

PhyCH IEs: UL/DL

Initial UE ID

RRC Transaction ID

Activation Time

New U-RNTI

New C-RNTI

UTRAN DRX cycle length coefficient

RRC State Indicator

Capability updaterequirement

IMSI / TMSI and LAI / P-TMSI and RAI / IMEI

0..3

absolute CFN (0..255); default: now

CELL_DCH/CELL_FACH/CELL_PCH/URA_PCH

3..9

UE radio access FDD: TRUE/FALSEUE radio access TDD: TRUE/FALSEenumerated: GSM (optional)

= S-RNTI + RNC-ID

(optional)

(default)


Nokia Parameters Related to Capability Update RequirementThe Nokia default setting for the IE Capability Update Requirement derivates

from the default values in the UMTS standard:

• UE radio access FDD cap. - Boolean value = TRUE • UE radio access TDD cap. - Boolean value = FALSE• System specific capability update requirement list (not used in RAN1, in

RAN1.5 system specific capability update requirement is always required from GSM system)

• System specific capability update requirement (not used in RAN1, used in RAN1.5): - static value = GSM


RRC Connection Setup message

UERNC


RRC layer

PHY

MAC

RLC

PDCP BMC

Radio Bearer

LogCH

TrCH

PhyCH

NAS Signalling user plane

PhyChconfiguratio

n

TrCHconfiguratio

n

RBconfiguratio

n


RRC Connection Setup message: RB IEs

UERNC


UE IEs

RB IEs

TrCH IEs: UL/DL

PhyCH IEs: UL/DL


RRC Connection Setup message and RBs

UERNC


RRCconfiguration

Radio Bearer

LogCH

Radio Link Control• Transfer of user data• Segmentation and reassembly. • Concatenation and padding• Sequence number check• In-sequence delivery of upper layer PDUs• Duplicate detection• Error correction• Flow control• Ciphering• Protocol error detection and recovery

(adopted from TS 25.322 V3.12.0)


RLC Modes of Operation

Transparent Mode (TrM)

• data transfer• segmentation &

reassembly

Unacknowledged Mode (UM)


reassembly• sequence control• ciphering• SDU discard

AcknowledgedMode (AM)


reassembly• sequence control• ciphering• SDU discard• error correction• flow control• in-sequence delivery

RLC

Radio Bearer

AM

UM

TrM

BCCH

PCCH

CCCH

UL

DL

CTCH

DCCH

DTCH

Common LogCH Dedicated LogCH


Signalling Radio Bearers

RNC

Radio Bearer

LogCH

NAS Signalling

RRC layer

MAC

RLCUL: TrMDL: UM

RB1

CCCH

RLCUL & DL

UM

RB2

DCCH

RLCUL & DL

AM

RB3

DCCH

RLCUL & DL

AM

RB4

DCCH

RB0

RLCUL & DL

AM

DCCH

optional

UE



RRC Connection Setup message: RB IEs

UERNC


UE IEs

RB IEs

TrCH IEs: UL/DL

PhyCH IEs: UL/DL

Signalling RBinformationto setup list

Signalling RBInformation

to setup

3 / 4

RB identity

CHOICE RLC info type

RLC info

Same as RB

RB mapping info

1..32values 1..4for signallingbearers only

Uplink anddownlink RLCmode

RB (LogCH) inTrCH mappingdescription


RRC Connection Setup message: TrCH IEs

UERNC


UE IEs

RB IEs

TrCH IEs: UL/DL

PhyCH IEs: UL/DL


Medium Access Control (MAC) Tasks

UERNC


TrCHs

MA

C t

asks

• Mapping between TrCHs and LogCHs• Transport Format (TF) selection• Priority handling between data flows

of one UE and between Ues (= dyn. scheduling)• UE identification on common TrCHs• TrCH type switching• De-/multiplexing between LogCHs and TrCHs• Traffic volume measurements• Ciphering (transparent mode)• ASC selection for RACH and CPCH

LogCHs

RRCconfiguration


RLC

RB5

DCCH

RLC

RB7

DTCH

RLC

DTCH

RB3

0 1 0 1 0 1

MAC

Medium Access Control (MAC) Tasks

Radio Bearer

LogCH

RLC

RB5

DCCH

RLC

RB7

DTCH

RLC

DTCH

RB3

0 1 0 1 0 1

MAC

TrCH

MAC PDU

MAC Header

RLC PDU

Example:

Defined by TFS


IE: Transport Format Set (FDD mode) for dedicated TrCHs

• TTI• Channel Coding• CRC size• Rate matching

• RLC Size • Number of Transport Blocks

Transport Format SetSemi-Static Part

Dynamic TF Information

• RLC Size • Number of Transport Blocks• RLC Size

• Number of Transport Blocks• RLC Size • Number of Transport Blocks• RLC Size

• Number of Transport Blocks

allowed TFson this dedicatedTrCH MAC

TrC

H

• All• Configured

(see IE RB mapping info, if present)• Explicit List

- RB Identity (1..32)- LogicalChannel (0..1)

Logical Channel combination optionsRB ID

RLC

RB ID

LogCH

RLC

LogCH

0 1 0 1



UE


UE IEs

RB IEs

TrCH IEs: UL/DL

PhyCH IEs: UL/DL

Added or ReconfiguredTrCH information list

UL Transport channelinformation common forall transport channels

Added or ReconfiguredUL TrCH information

uplink

1 to maxTrCH (32)(max. allowed TrCHsin one direction)

• UL TrCH type (DCH)• UL TrCH identity• TFS

RNC

PRACH TFCS

TFC subset

UL DCH TFCS

CHOICE FDD

(should not be usedsince TS25.331 V3.7.0)

(OP)

Minimum allowed TFC index /Allowed TFC list /Restricted TrCH information /Full TFC set (= default)

Indicates allowed combinations of already defined TFs and their TFCI values



UE


UE IEs

RB IEs

TrCH IEs: UL/DL

PhyCH IEs: UL/DL

Added or ReconfiguredTrCH information list

DL Transport channelinformation common forall transport channels

Added or ReconfiguredDL TrCH information

downlink

RNC

SCCPCH TFCS

Explicit

SameAsUL

CHOICE FDD

(should not be usedsince TS25.331 V3.8.0)

(OP)

DL DCH TFCS

(no data)

1 to maxTrCH (32)(max. allowed TrCHsin one direction)

• DL TrCH type (DCH)• DL TrCH identity• TFS• DCH quality target

(BLER quality value on a log10 scale: -6.3..0, step size: 0.1)


RRC Connection Setup message: PhyCH IEs

UERNC


UE IEs

RB IEs

TrCH IEs: UL/DL

PhyCH IEs: UL/DL optional:UARFCN uplink and downlinkdefault: operating band

Frequency Info

UL radio resources

DL radio resources


Physical Layer Tasks

UERNC


RRCconfiguration

TrCHs

PhyCHs

Ph

ysic

al Layer

TasksFor TrCHs:

• Error detection• FEC encoding/decoding• De-/multiplexing of CCTrCHs and PhyCHs

WCDMA related tasks:• Frequency and time synchronisation• Radio measurements• Inner - loop PC• De-/modulation and de-/spreading of PhyCHs

• Mapping of CCTrCHs in PhyCHs• Rate matching of CCTrCHs in PhyCHs

• Power weighting and PhyCHs combining• Macrodiversity and SHO


RRC Connection Setup message: PhyCH IEs for UL

UERNC


UE IEs

RB IEs

TrCH IEs: UL/DL

PhyCH IEs: UL/DL Frequency Info

UL radio resources

DL radio resources

Maximum allowedUL TX power

CHOICE channel requirement

Uplink DPCH info CPCH SET info

-50..33 dBm(default: existing max. UL TX power)

(OP)


RRC Connection Setup message: Uplink DPCH info

Uplink DPCH info

Uplink DPCHpower control info

TFCI existence

Spreading factor

Number of DPDCH

Scrambling codenumber

Scrambling codetype

Puncturing Limit

Number of FBI bits

CHOICE FDDlong / short

1.. maxDPDCH (=6)(default: 1)

4, 8, 16, 32, 64, 128, 256

0 .. 16,777,215

TRUE / FALSE(default: TRUE)

1 / 2 bits

0.40 .. 1(step size: 0.04)

OP

-164 .. –6 dB(step size: 2dB)

0 .. 7 frames

0 .. 7 frames

algorithm 1 / algorithm 2

1 dB / 2 dB(if algorithm 1)

DPCCHpower offset

PC Preamble

SRB Delay

TPC step size

Power ControlAlgorithm

if FDD


RRC Connection Setup message: PhyCH IEs for DL

UERNC


UE IEs

RB IEs

TrCH IEs: UL/DL

PhyCH IEs: UL/DL Frequency Info

UL radio resources

DL radio resources

Downlink informationcommon for all

radio links

Downlink infor-mation for each

radio link

1..MaxRL (8)Downlink information

per radio link list

(OP)


RRC Connection Setup message: PhyCH IEs for DLDownlink information

common for allradio links

Uplink DPCH infocommon for all RL

SSDT information

TX Diversity Mode

DPCH compressedmode info

CHOICE FDD

Downlink DPCH infocommon for all RL

Timing Indication

CFN-targetSFN frame offset

Downlink DPCH powercontrol information

CHOICE FDD

Fixed or Flexible Position

Downlink rate matchingrestriction information

Power offset PPilot-DPDCH

Spreading factor

TFCI existence

CHOICE SF

Number of bits for Pilot bits- if SF = 256: 2 / 4 / 8- if SF = 128: 4 / 8

Single TPC (DPC_Mode = 0) /TPC triplet in soft (DPC_Mode =1)

Initialise / Maintain

0..255

0..6 dB, step size 0.25

4..512

TRUE / FALSE

Fixed / Flexible

Lists TFI of DCHs & DSCHs, which have DL rate matching restrictions;rate matching should be done onTFCs of „DL TFCS with no restrictedTransport Channel“

requiredfor HO


RRC Connection Setup message: PhyCH IEs for DLDownlink infor-mation for each

radio link

Downlink DPCH infofor each RL

Primary CPICH info

PDSCH withSHO DCH Info

CHOICE FDD

PDSCH code mapping

SCCPCH Informationfor FACH


Primary CPICH usagefor channel estimation

DPCH frame offset

Secondary CPICH info

DL channelisation code

SSDT Cell Identity

Closed loop timingadjustment mode

Secondaryscrambling code

Spreading factor

Code number

Scrambling codechange

TPC combination index

(OP)Downlink DPCH infofor each RL

PCPICH may be used /shall not be used

0..38144 (step size 256; = DPCH,n)

1 to maxDPCH-DLchan (8)

4..512

0..SF-1

code change / no code change

(alternative scrambling codefor compressed mode with SF/2?)

1..15 (Secondary scrambling code)0..255 (Channelisation code)

0..511(primary scrambling code)

(MP)


RRC Connection Setup message: PhyCH IEs for DLDownlink infor-mation for each

radio link


Primary CPICH info

PDSCH withSHO DCH Info

CHOICE FDD

PDSCH code mapping



Secondary scramblingcode

STTD indicator

Spreading Factor

Code number

Timing offset

Fixed or FlexiblePosition

Pilot symbol existence

1 to maxFACHPCH (8)(max of FACHs and PCHsmapped on one S-CCPCH)

1 to maxSIB-FACH (8)(max number of referencesto SIB on one FACH)

Secondary CCPCH info

TFCS

FACH/PCH information

TFS

Transport channelidentity

CHOICE FDD

References to systeminformation blocks

Schedulinginformation

SIB typeSIBs only

CTCH indicator



Nokia Aspects Related to the Physical Layer• The IE „Maximum allowed UL TX power is not used in RAN1. In RAN1, the same value of

the UL TX power is used as is conveyed in the system information. That is why this value is not conveyed in this message.

• The DSCH does not exist in RAN1 and RAN1.5


Part IVRRC Connection Setup Complete


RRC Connection Setup Complete message

UERNC

RRC Connection Setup Complete ( )

UE IEs

Other IEsRRC Transaction ID

START list

CN domainidentity

START

UE radio accesscapability

UE radio accesscapability extension

• Release 99• Capabilities: PDCP, RLC, TrCH,

FDD RF, TDD RF, PhyCH, UE multi-mode/multi-RAT,security, UE positioning, measurement

0..3

1..maxCNdomains (4)

CS domain / PS domain

used to initialise the 20 MSBs of all hyperframe numbers

OP

UE system specificcapability

Inter-RAT UEradio access

capability

1 to InterSysMessages (4)

GSM MS Classmark 2 /GSM MS Classmark 3

OP


Nokia Aspects Related to RRC Connection Setup CompleteThe UE can return its capabilities to the S-RNC with the IE Radio Access Capability, which

contains• Transport channel capability: is distributed to the resource manager and to the admission

control entity• RF capability: the RF capability is distributed to the resource manager, the power control

entity and to the handover control entity• Physical channel entity: is distributed to resource manager• UE multi-mode/multi-RAT capability: in RAN1 not distributed• Security capability: in RAN1 not distributed• LCS capability: in RAN1 not distributed• Measurement capability: is distributed to the handover control entity. Presence is

mandatory if IE Multi-mode capability has the value "FDD" or "FDD/TDD" and a FDD capability update has been requested in a previous message. Otherwise this field is not needed in the message.

Among the optional other information elements, we find the Inter_RAT UE access capability, which is also not used in RAN1. The RNC shall extract the inter-system message from the UE CAPABILITY INFORMATION message and transfer it to the handover control entity.


Part VRRC Connection Setup Timer


RRC Connection Establishment Timing

RRC Connection Request transmissionV300 = 1; T300 started

RRC Connection Setupmessage received withinitial UE identity

RRC Connection Request transmissionV300 = V300 + 1; T300 started

T300 expiry orcell reselection

V300 N300

no

no

noyes

RRC Connection Setup Completetransmission

RRC connection establishmentaborted, UE enters RRC idle mode

T300: default value = 1000 msN300: default value = 3


RRC Connection ReleaseUE RNC

RRC Connection Release [RLC-UM, DCCH]

[RLC-UM, DCCH] RRC Connection Release Complete

[RLC-UM, DCCH] RRC Connection Release Complete

UE RNC

RRC Connection Release [RLC-UM, DCCH]

[RLC-AM, DCCH] RRC Connection Release Complete

UE RNC

RRC Connection Release [RLC-UM, CCCH]

CELL_DCH state

N308 times inT308 time intervals

CELL_FACH state;

DCCH available

CELL_FACH state;DCCH

unavailable


RRC Connection Setup Timer• RNC: T300

The RRC Connection Request retransmission timer (MS timer). This parameter is part of SIB 1.[100, 200, 400, 600, 800, 1000, 1200, 1400, 1600, 1800, 2000, 3000, 4000, 6000, 8000] ms; default: 3000 ms.

• RNC: N300The RRC Connection Request retransmission counter (MS counter). This parameter is part of SIB 1.[0 ... 7]; default: 3.

• RNC: T308The RRC Connection Release Complete retransmission timer. This parameter is part of SIB 1.[40, 80, 160, 320]ms; default: 160ms.

• RNC: N308This counter is used to define the maximum number of retransmissions of the RRC CONNECTION RELEASE COMPLETE message by the MS when the MS is in CELL_DCH state.[1 ... 8]; default: 2.


Part VIRB Control Procedures


Physical Channel Reconfiguration

MAC

PHY

RRC

configura

tion

PhyCHs

RLC

PDCP/BMC

UE RNCPhysical Channel Reconfiguration [RLC-AM/UM, DCCH]

Physical Channel Reconfiguration Complete [RLC-AM, DCCH]

UE RNCPhysical Channel Reconfiguration [RLC-AM/UM, DCCH]

Physical Channel Reconfiguration Failure [RLC-AM, DCCH]

on existingRBs


Transport Channel Reconfiguration

MAC

PHY

RRC

configura

tion

PhyCHs

RLC

PDCP/BMC

UE RNCTransport Channel Reconfiguration [RLC-UM/AM, DCCH]

Transport Channel Reconfiguration Complete [RLC-AM, DCCH]

UE RNCTransport Channel Reconfiguration [RLC-UM/AM, DCCH]

Transport Channel Reconfiguration Failure [RLC-AM, DCCH]

on existingRBs

TrCHs


RB Setup, Reconfiguration, and Release

MAC

PHY

RRC

configura

tion

PhyCHs

RLC

PDCP/BMC

UE RNCRadio Bearer Setup [RLC-AM/UM, DCCH]

UE RNCRadio Bearer Reconfiguration [RLC-AM/UM, DCCH]

TrCHs

RB

• Radio Bearer Setup Complete [RLC-AM, DCCH]

• Radio Bearer Setup Failure [RLC-AM, DCCH]

• Radio Bearer Reconfiguration Complete [RLC-AM, DCCH]

• Radio Bearer Reconfiguraiton Failure [RLC-AM, DCCH]

UE RNCRadio Bearer Release [RLC-UM/AM, PCCH]

• Radio Bearer Release Complete [RLC-AM, DCCH]• Radio Bearer Release Failure [RLC-AM, DCCH]

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S05 3G RPLS2_v2-0 RRC Connection Establishment

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