09 utran-procedures jmu.ppt [kompatibilitätsmodus] · pdf fileue nd bnode b nd b rnc rnc...

UTRAN ProceduresElementary procedures

– Pagingg g– RRC connection setup– Transaction reasoning– Authentication and security controlAuthentication and security control– Transaction setup with RAB allocation– Transaction clearing and RAB release– RRC connection release– RRC connection release

RRM procedures– Radio link addition and deletion

I t t h d f UMTS t GSM (CS/PS)– Intersystem handover from UMTS to GSM (CS/PS)– UE state transitions/ bearer reconfiguration

MM procedures > see MM slidesMM procedures -> see MM slidesCM procedures -> see CM slides

References:

UMTS Networks 1Andreas Mitschele-Thiel, Jens Mueckenheim November 2009

– Kaaranen ch. 10 (simple cases discussed here)– 3GPP TR 25.931 (more complicated cases)

Basic Model of UMTS Network TransactionsPagingPaging

RRC Connection Establishment

A transaction comprises all the elementary procedures required to enable

– the transport of user data (PS or CS RRC Connection Establishment

Transaction Reasoning(Signaling conn establishment)

mode) or– the exchange of higher-layer signaling

messages (e.g. MM or CM)(Signaling conn. establishment)

Authentication andSecurity UE indicates the CNy

Transaction Setup andRAB Allocation

UE indicates the CN the requested service

All ti f b t tTransaction

(user or control plane)

Allocation of bearers to support required UMTS bearer service

Transaction Release andRAB Release

Transfer of data

Release of all bearers to support


RRC Connection Releasepp

UMTS bearer service

PagingPaging


T ti R i

Paging type 1:• UE idle mode (no RRC connection)

Transaction Reasoning(Signaling conn. establishment)

Authentication andSecurity

Transaction Setup andRAB Allocation( )

• RRC connected modes cell_PCH or URA_PCH

Example: paging for a UE in idle mode

Transaction(user or control plane)


RRC Connection ReleaseExample: paging for a UE in idle mode

UE N d B N d B RN C RN C C N

RRC Connection Release

UE N ode B1.1

N ode B2.1

RN C1

RN C2

C N

RA N A P RA N A P1. Pagin g

RA N A PRA N A P 1. Pagin g

2. PC C H : Pagin g T ype 1

(Requesting CN domain, IMSI, ...)

3 . PC C H : Pagin g T ype 1


PagingPaging


T ti R i

Paging type 2:• UE is in RRC connected mode cell_DCH or cell_FACH

Paging eq est f om anothe CN domain

Transaction Reasoning(Signaling conn. establishment)


Transaction Setup andRAB Allocation• Paging request from another CN domain

Example: paging for a UE in RRC Connected Mode



RRC Connection Releasep p g g(CELL_DCH or CELL_FACH state)

U E Serving

R N CC N


R N C

R A N A P R A N A P 1 . P aging

R R C R R C 2 . D C C H : P aging T ype 2

2 cases:• UTRAN coordinates the paging request with the existing RRC connection (given example)• UE coordinates the paging request with the existing RRC connection


• UE coordinates the paging request with the existing RRC connection

RRC Connection SetupPaging


T ti R iTransaction Reasoning(Signaling conn. establishment)



UE Node B RNC CN

UE_Idle




Initial Random Access

CCCH (TM)/ RACH: RRC Connection Request • Addr.: Initial UE ID• Request for DCCH• Incl. Establishment RRC Connection Release

RL Setup Request

RL Setup Response

cause

Establishment f UTRANALCAP Iub Transport bearer Setup

UL/DL Synchronisation

of UTRAN DCH resources incl. CAC

CCCH (UM)/ FACH: RRC Connection Setup Addr.: Initial UE ID

CELL_DCH

DCCH (AM)/ DCH: RRC Connection Setup Complete • Addr.: by DCH • DCCH established • UE capabilities

known


Establishment of a RRC connection in cell_DCH mode

Initial Random Access

UE Node B Controlling RNC

Preamble

Preamble

Preamble

Persistency check before

Preamble

Acquisition Indication (AICH)

Resourcing Node BHardware

PRACH Message

CRC Check

RACHFP

RACH Message[RRC Connection Request]

RACHFP

UE addressing• CCCH: UE ID embedded in the RRC message


• CCCH: UE ID embedded in the RRC message• DTCH/ DCCH: UE ID included in MAC header

RRC Connection SetupReasons for RRC connection setup:• Call setup (mobile-originated and mobile-terminated calls)

– Conversational callConversational call– Streaming call– Interactive call– Background call– Emergency call– Call re-establishmentCall re establishment

• Exchange of signaling messages (low/high priority)

RRC ti t t iRRC connection request message contains, e.g.• IMSI, TMSI, IMEI• Location area, routing area identity, etc., g y,• Other information: e.g. HSDPA/ E-DCH UE capability, standards release


NAS Signaling Connection Establishment(Transaction Reasoning)

Paging


T ti R i( a sact o easo g) Transaction Reasoning(Signaling conn. establishment)






UE Servin gRN C

C N


1. RRC C on n ection E stablish m en t

2 D C C H : In itia l D irect T ran sferRRCRRC

2. D C C H : In itia l D irect T ran sfer

RA N A P RA N A P3. In itia l UE M essage

Payload contains system network message: Information about the transaction initiated by


Information about the transaction initiated by the UE (IMSI, TMSI, location area, kind of requested transaction)

Authentication and Security ControlPaging







RRC Connection ReleaseRRC Connection Release

Authentication request/response: mutual authentication of UE and networkS it d d/ l t CN d i i di t t UTRAN d UE th ti


Security mode command/complete: CN domain indicates to UTRAN and UE the encryption details (method/algorithms and encryption keys)

Transition Setup and RAB Establishment (CS Mode)

Paging









Transition Setup and RAB Establishment (PS Mode)

Paging









RAB Establishment

CN SRNCNodeBUE

Radio Link Reconfiguration Prepare

RAB Assignment

ALCAP Iu Transport Bearer Establishment

Cell_DCH/ Cell FACH When CS CNWhen Cell_FACH:

Radio Link Reconfiguration Ready

ALCAP Iub Transport Bearer Establishment

Node B – RNC Data Transport Bearer Sync

Cell FACH When CS CN RL Setup

Radio Bearer Setup Complete

Radio Bearer Setup

Radio Link Reconfiguration Commit

Activation Time , TActivation

RAB Assignment Response

Cell DCH

Example: Synchronised establishment of a RAB on DCH


Example: Synchronised establishment of a RAB on DCH

Transaction Release and RAB Release (CS Mode)

Paging


T ti R i(CS Mode) Transaction Reasoning(Signaling conn. establishment)







Note: signaling connection and RRC connection remains

Transaction Release and Iu Release (CS Mode)

Paging









Note: signaling connection and RRC connection are released

Transaction Release and RAB Release (PS Mode)

Paging


T ti R i(PS Mode) Transaction Reasoning(Signaling conn. establishment)







Note: signaling connection and RRC connection remain

Transaction Release and Iu Release (PS Mode)

Paging









Note: signaling connection and RRC connection are released

RRC Connection ReleasePaging









RRC Connection Release (involving DRNC)Example: RRC connection release of a dedicated channel in soft HO modeExample: RRC connection release of a dedicated channel in soft HO mode

with DRNC U E N o de B

D ift R N SN o de B

S i R N SD rift R N C

ServingR N C

C N

D rift R N S Serving R N S R N C R N C

R A N AP

R A N AP

1. Iu R elease C o mmand

2. Iu R elease C o mplete

R A N AP

R A N AP

5. R R C C o nnectio n R elease C o mplete

4 . R R C C o nnectio n R eleaseR R C

R R CR R C

3. A LC A P Iu B earer R elease

R R C

6. R adio L ink D eletio n


R R CR R C

N B A P

R N SAP

N B AP

R N S AP

10. R adio L ink D eletio n R espo nse


9 . R adio Link D eletio n R espo nse N B AP

N B A P N B AP

N B AP

N B A P

N B AP

11. R adio Link D eletio n R espo nse

N B AP

R N S AP

12. ALC AP Iub B earer R elease

N B AP

R N SAP


ALC AP Iur B earer R elease 13. A LC A P Iub B earer R elease

Soft Handover – Radio Link Addition UE SRNC Target

Node B DRNC

RNC Decides to add a new RadioRadio Link Add/ Setup Request add a new Radio Link

start Rx

Radio Link Add/ Setup Request

Radio Link Add/ Setup Response

ad o dd/ Setup equest


ALCAP Iur bearer Setup ALCAP Iub Data Transport bearer Setup

Radio Link Restore Indication

When RL Setup


Active Set Update (Radio Link Addition)

Target Node B is ready

Radio Link Restore IndicationRadio Link Restore Indication

start Tx

UE starts E.g. new neighbour cell list

Active Set Update Complete

Rx on new radio link

neighbour cell listMeasurement Control


Unsynchronized addition

Soft Handover – Radio Link Deletion

UE SRNC Node B DRNC

Active Set Update (Radio Link Deletion)

Active Set Update Complete

RNC Decides to delete an existing Radio Link

UE stops Rx on old radio link

E.g. new neighbour cell list

p p

Measurement Control

Free-up resources of old NodeB

Radio Link Deletion RequestRadio Link Deletion Request

A CA b lA CA b b l

Radio Link Deletion ResponseRadio Link Deletion Response

stop Rx & Tx

ALCAP Iur bearer ReleaseALCAP Iub Data Transport bearer Release


Unsynchronized deletion

Inter-system Handover (UMTS to GSM)

UE 2G MSCSRNC 3G MSC

RNC Decides to

BSC

Channel activation procedure in BSS

Relocation RequiredRNC Decides to perform HO to GSM MAP Prepare HO Req.

HO Request

HO Request ACK

UE switches GSM BSS

MAP Prepare HO Response

HO from UTRAN Command

q

Relocation Command

to GSM BSS

HO Complete

Radio Link Failure in UTRAN and Radio Link Establishment in GSM BSS

Iu Release Procedure

HO Complete

MAP Send End Signal Req.

Free up of ResourcesResources

MAP Send End Signal Resp.


UTRAN Initiated UMTS-GPRS Cell Reselection

UE SGSN Serving RNC

2 C ll Ch O d f

1. UTRAN decision to perform Cell Change Order from UTRAN:

RRC RRC

2. Cell Change Order from UTRAN

3. The UE accesses the GSM system and initiates routing area RANAP RANAP

4. SRNS Context Request

6 I R l C d

system and initiates routing area update. The packet context is transferred to the new SGSN.

RANAP RANAP

RANAP RANAP 5. SRNS Context Response

RANAP RANAP 6. Iu Release Command

RANAP RANAP 7. Iu Release Complete


Most signalling between 2G and 2G CN

SRNS Relocation (CS)


UE RRC Connected States

Cell FACHCell FACHoptional

Data activity

L

High trafficor CS call

Data activity

L

High trafficor CS call

Cell DCHURA PCHNo data

No dataLow traffic

Dynamic RBreconfigure

Cell DCHURA PCHNo data

No dataLow traffic

Dynamic RBreconfigure

• Cell_DCH

Cell DCHURA PCH

Data activity

Cell DCHURA PCH

Data activity

– Dedicated Traffic and Control carried over DCH• Cell_FACH

– Dedicated Traffic and Control carried over RACH/ FACH– Dedicated Traffic and Control carried over RACH/ FACH• URA_PCH

– No air interface resources required, “dormant” RB


– UE receives paging on UTRAN Routing Area (URA) basis rather than standard routing area (RA); URA usually in the order of 10 cells

URA_PCH to CELL_DCH/ CELL_FACH Transition

UE Node B SRNC

URA PCH

UE temporary in C ll FACH

Cell Update (CCCH, RACH, TM, cause “paging response” or ”Uplink Data transmission”)

Radio Link Setup request

Radio Link Setup response

Cell_FACHIf Cell_DCH Incl. DBC check

For each DCH, t l

UE Transitions to Cell DCH/ stays in Cell_FACH

Cell Update Confirm(CCCH, FACH, UM)

ALCAP Iub Data Transport bearer Setup separatelyIncl. UL/ DL Synch.

RRC State Indicator Cell_DCH/ URA FACH

Cell_DCH: Radio Bearer Reconfiguration Complete (DCCH AM, DCH)

C ll FACH UTRAN M bili C fi (DCCH AM RACH)UE Sends Complete

Radio Link Restore Indication Cell_DCH/ Cell_FACH

URA_FACHTActivation = ‘NOW’

Cell_FACH: UTRAN Mobility Confirm (DCCH AM, RACH)UE Sends Complete Message

L2 ACK (DCCH)


Unsynchronised procedure with CRNC = SRNC

CELL_FACH to CELL_DCH Transition

UE Node B RNC CN

Radio Link Setup request

Radio Link Setup responseRNC determines UE should transition to

Cell FACH

Radio Link Setup response Cell DCH

ALCAP for both DCH

Radio Bearer Reconfiguration (DCCH, FACH) UE Transitions to Cell DCH

R di Li k R I di i

RNC Stops MAC-d Transmission to UE

C ll DCH

FP Synch

Radio Bearer Reconfiguration Complete (DCCH AM, DCH)UE Sends Complete Message on DCH

L2 ACK (DCH)

Radio Link Restore Indication Cell DCH



CELL_DCH to URA_PCH/ CELL_FACH Transition

UE Node B SRNC

RRC State Indicator Cell_FACH/ URA_PCH

Cell DCH

UE transitions to Cell FACH and

Radio Bearer Reconfiguration (DCCH, DCH, UM)

L2 ACK (DCCH, FACH) UE Sends Complete Message on RACH

_reads SIB Radio Bearer Reconfiguration Complete(DCCH, RACH, AM)

RNC leaves time for L2 ACK being errored

Radio Link Deletion Request

Cell_FACH/URA_PCH

errored

Radio Link Deletion Response Free-up non-used DCH Resources

ALCAP Iub Data Transport Bearer Release



Dynamic Bearer Reconfiguration UE SRNC

Radio Link Reconfig Prepare

Node B (Drift RNS)

Node B (Serving RNS)

DRNC

R di Li k R fi ti PCell DCH RNC Decides to

change the rate ofPrepareRadio Link Reconfiguration Prepare

Radio Link Reconfiguration Prepare

Radio Link Reconfiguration Ready Radio Link Reconfig Ready

di i k fi i d

change the rate of the UE

Radio Link Reconfiguration Ready

ALCAP Iur bearer Setup ALCAP Iub Data Transport bearer Setup

ALCAP Iub Data Transport bearer Setup

When rate increase

Radio Link Reconfig commit (TActivation) Radio Link Reconfiguration Commit (TActivation)

Radio Link Reconfiguration commit (TActivation)

ALCAP Iub Data Transport bearer SetupAll Node B’s are ready

Activation Time g ( Activation)

Transport Channel Reconfiguration (DCCH, AM, TActivation)

Transport Channel Reconfiguration Complete (DCCH, AM)

, TActivation

UE & Node-B reconfigured to

Release the transport Network resources for h i

ALCAP Iub Data Transport bearer Release

ALCAP Iub Data Transport bearer Release ALCAP Iur bearer Release

Cell DCH

reconfigured to the new rates the previous

configuration


Synchronised DCH modify w/o transport bearer reconfiguration

09 utran-procedures jmu.ppt [kompatibilitätsmodus] · pdf fileue nd bnode b nd b rnc rnc...

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