09 utran-procedures jmu

8/3/2019 09 UTRAN-Procedures JMu

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UTRAN Procedures

Elementary procedures Pa in RRC connection setup

Transaction reasoning Transaction setup with RAB allocation Transaction clearing and RAB release

RRM procedures Radio link addition and deletion n ersys em an over rom o UE state transitions/ bearer reconfiguration

-CM 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)


2/28

Basic Model of UMTS Network Transactions

A transaction comprises all the elementaryprocedures required to enable

the transport of user data (PS or CS

Transaction Reasoning

mode) or

the exchange of higher-layer signalingmessages (e.g. MM or CM)

.

Authentication andSecurity

Transaction Setup andRAB Allocation

the requested service

Transaction

(user or control plane)

oca on o earers o supporrequired UMTS bearer service

Transaction Release andRAB Release

Transfer of data

Release of all bearers to support


RRC Connection ReleaseUMTS bearer service


3/28

PagingPaging

RRC Connection Establishment

Paging type 1:

UE idle mode (no RRC connection)

ransacton easonng(Signaling conn. establishment)



RRC connected modes cell_PCH or URA_PCH Transaction(user or control plane)Transaction Release and

RAB Release

o e

1.1

o e

2 .1 1 2

RA N A P RA N A P1. Paging

R A N A PR A N A P1. Paging

2. PCCH : Paging Type 1

(Requesting CN domain,

IMSI, ...)

3. PCCH : Paging Type 1



4/28

PagingPaging


Paging type 2:

UE is in RRC connected mode cell_DCH or cell_FACH




ag ng reques rom ano er oma n

Example: paging for a UE in RRC Connected Mode

Transaction(user or control plane)

Transaction Release and

RAB Release

(CELL_DCH or CELL_FACH state)

UE Serving

R N C

C N

R A N A P R A N A P1. Paging

R R CR R C2. DCCH: Paging Type 2

2 cases:

UTRAN coordinates the paging request with the existing RRC connection (given example)



5/28

RRC Connection SetupPaging





UE Node B RNC CN

UE_Idle



RAB Release

Initial Random Access

CCCH (TM)/ RACH: RRC Connection Request

Addr.: Initial UE ID

Request for DCCH

Incl. Establishment

RL Setup Request

RL Setup Response

cause

Establishment

ALCAP Iub Transport bearer Setup

UL/DL Synchronisation

of UTRAN

DCH resourcesincl. 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


6/28

Initial Random Access

UE Node B Controlling

RNC

Preamble

Preamble

Preamble

Persistency

check before

Acquisition Indication (AICH)

Resourcing Node BHardware

PRACH Message

CRC Check

RACHFP

RACH Message

[RRC Connection Request]

RACHFP

UE addressing


DTCH/ DCCH: UE ID included in MAC header


7/28

RRC Connection Setup

Reasons for RRC connection setup: Call setup (mobile-originated and mobile-terminated calls)

Streaming call

Interactive call Background call

Emergency call

-

Exchange of signaling messages (low/high priority)

connec on reques message con a ns, e.g.

IMSI, TMSI, IMEI

Location area routin area identit etc. Other information: e.g. HSDPA/ E-DCH UE capability, standards release



8/28

NAS Signaling Connection EstablishmentTransaction Reasonin

Paging


ransac on eason ng

(Signaling conn. establishment)





RAB Release

UE Serving

RN C

C N

1. RRC C onnection Establishment

2 DC C H : I n it ia l D i r ec t T r an sfe rRRCRRC

.

RA NA P RA N AP

3. Init ial UE M essage

Payload contains system network message:


the UE (IMSI, TMSI, location area, kind ofrequested transaction)


9/28

Authentication and Security ControlPaging


ransacton easonng






RAB Release

Authentication request/response: mutual authentication of UE and network


ecur ty mo e comman comp ete: oma n n cates to an t e encrypt on

details (method/algorithms and encryption keys)


10/28


11/28

Transition Setup and RAB Establishment(PS Mode)

Paging


ransacton easonng






RAB Release



12/28

RAB Establishment

CNSRNCNodeBUE

Radio Link Reconfiguration Prepare

RAB Assignment

ALCAP Iu Transport Bearer Establishment

Cell_DCH/When Cell_FACH:

Radio Link Reconfiguration Ready

ALCAP Iub Transport Bearer Establishment

Node B RNC Data Transport Bearer Sync

RL Setup

Radio Bearer Setup Complete

Radio Bearer Setup

Radio Link Reconfiguration Commit

Activation Time ,

TActivation

RAB Assignment Response

Cell DCH



13/28

Transaction Release and RAB ReleasePaging


ransacton easonng






RAB Release


Note: signaling connection and RRC connection remains


14/28

Transaction Release and Iu Release(CS Mode)

Paging


ransacton easonng

(Signaling conn. establishment)Authentication and

Security




RAB Release


Note: signaling connection and RRC connection are released


15/28

Transaction Release and RAB ReleasePaging


ransacton easonng


Security




RAB Release


Note: signaling connection and RRC connection remain


16/28

Transaction Release and Iu Release(PS Mode)

Paging


ransacton easonng


Security




RAB Release


Note: signaling connection and RRC connection are released


17/28

RRC Connection ReleasePaging


ransacton easonng


Security




RAB Release



18/28

RRC Connection Release (involving DRNC)

xamp e: connec on re ease o a e ca e c anne n so mo ewith DRNC

U E N ode B N ode B D rift Serving C N r t erv ng

R A N A P

R A N A P

1. Iu Release Command

2. Iu R elease Comp lete

R A N A P

R A N A P

5. RRC Connection Release Complete

4. RRC Connection ReleaseRR C

3. ALCAP Iu Bearer Release

R R C

6. Radio Link Deletion


R R CRR C

N B A P

R N S A P

N B A P

R N S A P

10. Radio Link Deletion R esponse


9. R adio Link Deletion R esponseN B A P

N B A PN B A P

N B A P

N B A P

N B A P

11. Radio Link Deletion R esponse

R N S A P

12. ALCA P Iub Bearer Release

R N S A P


ALCAP Iur BearerRelease13. ALCA P Iub Bearer Release


19/28

Soft Handover Radio Link Addition

UE SRNCTarget

Node BDRNC

RNC Decides toRadio Link Add/ Setu Re uest

Link

start Rx

Radio Link Add/ Setup Request

Radio Link Add/ Setup Response

ALCAP Iur bearer SetupALCAP Iub Data Transport bearer SetupWhen RL Setup

Active Set Update (Radio Link Addition)

Target Node B is

ready

a o n es ore n ca onRadio Link Restore Indication

start Tx

UE starts E.g. newnei hbour cell list

Active Set Update Complete

Rx on new

radio linkMeasurement Control


Unsynchronized addition


20/28

Soft Handover Radio Link Deletion

UE SRNCNode B DRNC

Active Set Update (Radio Link Deletion)

Active Set U date Com lete

RNC Decides todelete an existingRadio Link

UE stopsRx on oldradio link

E.g. new

neighbour cell listMeasurement Control

Free-up resources ofold NodeB

Radio Link Deletion RequestRadio Link Deletion Request

Radio Link Deletion ResponseRadio Link Deletion Response

stop Rx & Tx

ALCAP Iur earer ReleaseALCAP Iu Data Transport earer Release


Unsynchronized deletion


21/28

Inter-system Handover (UMTS to GSM)

UE 2G MSCSRNC 3G MSC BSC

Channel activation

procedure in BSS

Relocation Required

perform HO to

GSM MAP Prepare HO Req.HO Request

HO Request ACK

UE switches

MAP Prepare HO Response

HO from UTRAN Command

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

MAP Send End Signal Resp.



22/28

UTRAN Initiated UMTS-GPRS Cell Reselection

UE SGSNServing

RNC

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

RRC RRC

. e ange r er rom

UTRAN

3. The UE accesses the GSM 4. SRNS Context Requestsys em an n a es rou ng area

update. The packet context is

transferred to the new SGSN.RANAP RANAP

5. SRNS Context Response

RANAP RANAP. u e ease omman

RANAP RANAP7. Iu Release Complete


Most signalling between 2G and 2G CN


23/28

SRNS Relocation (CS)



24/28

UE RRC Connected States

Cell FACHCell FACH

optional

Dataactivity

High trafficor CS call

Dataactivity

High trafficor CS call

No data

No dataow

traffic

Dynamic RBreconfigureNo data

No dataow

traffic

Dynamic RBreconfigure

Cell_DCH

Data activity

Data activity

Dedicated Traffic and Control carried over DCH

Cell_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


25/28

URA_PCH to CELL_DCH/ CELL_FACH Transition

UE Node B SRNC

URA PCH

UE temporary in Cell Update (CCCH, RACH, TM, cause paging response or Uplink Data transmission)

Radio Link Setup request

Radio Link Setup response

e _ AIf Cell_DCH

Incl. DBC check

For each DCH,

UE Transitions to

Cell DCH/ stays in

Cell_FACHCell Update Confirm(CCCH, FACH, UM)

ALCAP Iub Data Transport bearer Setupseparate y

Incl. UL/ DL Synch.

RRC State Indicator

Cell_DCH/

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

UE Sends Com lete

Radio Link Restore IndicationCell_DCH/

Cell_FACH

_

TActivation = NOW

e _ : ob ty on rm , )

Message

L2 ACK (DCCH)


Unsynchronised procedure with CRNC = SRNC


26/28

CELL_FACH to CELL_DCH Transition

UE Node B RNC CN

Radio Link Setup request RNC determines UEshould transition to

Cell FACH

Cell DCH

ALCAP for both DCH

Radio Bearer Reconfiguration (DCCH, FACH)UE Transitions toCell DCH RNC Stops MAC-d

Transmission to UE

FP Synch

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

L2 ACK (DCH)

a o n estore n cat one




27/28

CELL_DCH to URA_PCH/ CELL_FACH Transition

UE Node B SRNC

RRC State Indicator

Cell_FACH/

URA_PCH

Cell DCH

UE transitions toCell 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

Radio Link Deletion Response Free-up non-usedDCH Resources

ALCAP Iub Data Transport Bearer Release




28/28

Dynamic Bearer Reconfiguration

UE SRNC

Radio Link Reconfig

Pre are

Node B(Drift

RNS)

Node B(Serving

RNS)

DRNC

Cell DCH RNC Decides to

chan e the rate of a o n econ gurat on repare

Radio Link Reconfiguration Prepare

Radio Link Reconfiguration ReadyRadio Link Reconfig Ready

the UE

Radio Link Reconfiguration Ready

ALCAP Iur bearer SetupALCAP Iub Data Transport bearer SetupWhen rate increase

Radio Link Reconfigcommit (TActivation)Radio Link Reconfiguration Commit (TActivation)

Radio Link Reconfi uration commit T

All Node Bs are

ready

Activation Time

Transport Channel Reconfiguration (DCCH, AM, TActivation)

Transport Channel Reconfiguration Complete (DCCH, AM)

, TActivation

UE & Node-BRelease the transport

Network resources for

ALCAP Iub Data Transport bearer Release

ALCAP Iub Data Transport bearer Release ALCAP Iur bearer Release

Cell DCH

the new ratesthe prev ous

configuration


Synchronised DCH modify w/o transport bearer reconfiguration

09 utran-procedures jmu

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