9 utran procedures

8/6/2019 9 UTRAN Procedures

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UMTS Networks 1 Andreas Mitschele-Thiel 13-Nov-07

UTRAN Procedures

Elementary procedures

Paging

RRC connection setup

Transaction reasoning

Authentication and security control

Transaction setup with RAB allocation

Transaction clearing and RAB release

RRC connection release

RRM procedures

Radio link addition and deletion

SRNS relocation (CS)

Intersystem handover from UMTS to GSM (CS)

MM procedures -> see MM slides

CM procedures -> see CM slides

References:

Kaaranen ch. 10 (simple cases discussed here)

3GPP TR 25.931 (more complicated cases)


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Basic Model of UMTS Network Transactions

Paging

RRC Connection Establishment

Transaction Reasoning(Signaling conn. establishment)

Authentication andSecurity

Transaction Setup andRAB Allocation

Transaction

(user or control plane)

Transaction Release andRAB Release

RRC Connection Release

UE indicates the CNthe requested service

A transaction comprises all the elementary

procedures required to enable the transport of user data (PS or CS

mode) or

the exchange of higher-layer signaling

messages (e.g. MM or CM)

Allocation of bearers to supportrequired UMTS bearer service

Transfer of data

Release of all bearers to supportUMTS bearer service


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Paging

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

RRC connected modes cell_PCH or URA_PCH

Example: paging for a UE in idle mode

UE Node B

1.1

Node B

2.1

RNC

1

RNC

2

CN

R ANAPR ANAP1. Paging

2. PCCH : Paging Type 1

RANA P RANA P1. Paging

3. PCCH: Paging Type 1

(Requesting CN domain,

IMSI, ...)

Paging

RRC ConnectionEstablishment

Transaction Reasoning(Signalingconn. establishment)

AuthenticationandSecurity

TransactionSetup andRAB Allocation

Transaction(user orcontrolplane)

TransactionRelease andRAB Release

RRC ConnectionRelease


4/21UMTS Networks 4 Andreas Mitschele-Thiel 13-Nov-07

Paging

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

Paging request from another CN domain

Example: paging for a UE in RRC Connected Mode(CELL_DCH or CELL_FACH state)

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 Serving

R N C

C N

R R CR R C2. DCCH : Paging Type 2

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

Paging










RRC Connection Setup

Establishment of a RRC connection in cell_DCH mode

5 . Do wnlink Synchronisa t ion

U E N o d e B

Se rv ing R N SServing

R N C

D C H - F PD C H - F P

Al loca te R NT I

Selec t L1 and L2

parameters

R R CR R C1. C C C H : R R C C onne c t ion R e que s t

N B A PN B A P

3. Radio Link Se tup Response

N B A PN B A P

2. Radio Link Se tup Request

R R CR R C7 . C C C H : RRC C onnec t ion Se tup

Star t RX

Star t TX

4. ALCA P Iub Data Transpor t Bearer Se tup

R R CR R C9. DC C H : RRC Connec t ion Se tup Comple te

D C H - F PD C H - F P6. U pl ink Synchronisa t ion

N B A PN B A P

8. Radio Link Restore Indica t ion

Paging

RRC Connection Establishment









RRC Connection Setup

Reasons for RRC connection setup:

Call setup (mobile-originated and mobile-terminated calls)

Conversational call

Streaming call

Interactive call

Background call

Emergency call

Call reestablishment Exchange of signaling messages (low/high priority)

RRC connection request message contains, e.g. IMSI, TMSI, IMEI

Location area, routing area identity, etc.



NAS Signaling Connection Establishment(Transaction Reasoning)

UE Servin g

RN C

C N

1. RRC Connect ion Establishment

RRCRRC2. DCCH : Initial Direct Tran sfer

RA N A P RA N A P

3. Initial UE M essage

Payload contains system network message:

Information about the transaction initiatedby the UE (IMSI, TMSI, location area, kindof requested transaction)

Paging










Authentication and Security Control

Authentication request/response: mutual authentication of UE and network

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

Paging



Authentication andSecurity







Transition Setup and RAB Establishment(CS Mode)

Paging










Transition Setup and RAB Establishment(PS Mode)

Paging









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Transaction Release and RAB Release(CS Mode)

Note: signaling connection and RRC connection remains

Paging








T ti R l d I R l



Transaction Release and Iu Release(CS Mode)

Note: signaling connection and RRC connection are released

Paging









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Transaction Release and RAB Release(PS Mode)

Note: signaling connection and RRC connection remain

Paging








T ti R l d I R l


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Transaction Release and Iu Release(PS Mode)

Note: signaling connection and RRC connection are released

Paging









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RRC Connection ReleasePaging









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RRC Connection Release (involving DRNC)

Example: RRC connection release of a dedicated channel in soft HO mode

with DRNC

10. Radio Link Deletion Respo nse

8. Radio L ink Deletion

9. Radio Link D eletion Re sponse

6. Radio L ink Deletion

5. RRC Connection Release Complete

4. RRC Connection Release

11. Radio L ink D eletion R esponse

7. Radio L ink D eletion

U E N ode B Drif t RNS

Node BServing RNS

DriftRN C

ServingRN C

CN

RRC

R RCRRC

N B A P

N B A P

RNSAP

N B A PN B A P

N B A P

R N S A P

R A N A P

R A N A P

3. ALCAP Iu Bearer Release

ALCAP Iur Bearer

Release13. ALCAP Iub Bearer Release

12. ALCAP Iub Bearer Release

1. Iu Release Command

2. Iu Release Comp lete

R RC

R A N A P

N B A P

R N S A P

N B A P

N B A P

RNSAP

R A N A P

n Paging


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So

ftHand

over

RadioL

inkAd

dition Paging





Transaction(user or control plane)



n Paging


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So

ftHand

over

RadioL

inkDeletion Paging








) Paging


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SR

NSRelocation

(CS) Paging








r )


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Inte

r-syste

mHandover

(UMTStoGSM

9 utran procedures

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