08_RN31558EN10GLA0_UTRAN Control Protocol Overview

1 © Nokia Siemens Networks RN31558EN10GLN0

UTRAN Control Protocol Overview (without RRC)3GRPLS (RN3155) – Module 8

Part I - RANAPPart II - RNSAPPart III - NBAPPart IV - Call Setup Example

Flow Example: Call Setup


At the end of this module, you will be able to

• Outline RANAP, NBAP, and RNSAP services

• Explain the SRNC Relocation flow

• Understand the structure of call Setup flows

Objectives


3G-MSC/VLR

3G-SGSN

UE Node BRNC

RNC

RNS

RNS

RRC

Iur: RNSAP

Iu-PS: RANAP

Iu-CS: RANAPIub: NBAP

UTRAN Specific Signalling and Control Protocols


Part I - RANAP




3G-MSC/VLR

3G-SGSN

RNC

UTRAN

Iu-PS: RANAP

Iu-CS: RANAP

CN

S-RNC Relocation

RAB Management

NAS PDU Transport

Location Reporting

PagingIu Signalling Connection

Management

RANAP Services


Class 1:EP with response

Request

Response (ack/unack)timer

timeout implicit negative acknowledgement

Class 2:EP with no response

Request

Class 3:EP with multiple responses

Request

Response (ack/unack)timer

timeout implicit negative acknowledgement

Response (ack/unack)

Response (ack/unack)

RANAP: Elementary Procedures


3G-MSC/VLR

RNC

LA

Cell 3

Cell 2

Cell 1

RN C

RANAP: Paging ( )

RANAP: Paging ( )

RRC: Paging Type 1

RRC: Paging Type 1

RRC: Paging Type 1

Message Type

Temporary UE IdentityPaging Area IDPaging Cause

Non Searching IndicationDRX Cycle Length

Coefficient

Permanent NAS UE IdentityCN Domain Indicator

CS domain/ PS domain

TMSI / P-TMSI

IMSI

LAI / RAI

Terminating Conversational Call / ... / Terminating High Priority Signalling

non-searching / searching

6 .. 9


Example Flow: Paging


RNC[RLC-TR, CCCH] RRC Connection Request

RRC Connection Setup [RLC-UM, CCCH]

[RLC-AM, DCCH] RRC Connection Setup Complete

MSC/VLR or SGSN

[RLC-AM, DCCH] Initial Direct TransferInitial UE Message ( )

RRC ConnectionEstablishment

Message Type

RAC

NAS-PDU

Global RNC-ID

Iu Signalling Connection Identifier

LAICN Domain Indicator

SAI

bit string (24 bits) (most significant bit (MSB) identifies the node (RNC/CN node) that has assigned this value)

PLMN Identity + RNC ID Class 1:EP with response

Example Flow: NAS Signalling Establishment


RNC

MSC/VLR or SGSN

RAB Assignment Request ( )AC

Bearer setup/modification/release AALx link setup/modification/release

RAB Assignment Response ( )

RABs To Be Setup Or Modified List

RABs To Be Released List

First Setup OrModify Item

Second Setup OrModify Item

RAB Parameters

User Plane Information

RAB ID

NAS Synchroni- sation Indicator

Transport Layer Information

• Traffic Class• RAB Asymmetry Indicator• Maximum Bit Rate• Guaranteed Bit Rate• Delivery Order• Maximum SDU Size• SDU parameters• Transfer Delay• Traffic Handling Priority• Allocation/Retention

priority• Source Statistics

Descriptor

Class 3 EP

Example Flow: RAB Assignment


RNC MSC/VLR or SGSN

RAB Assignment Request ( )AC

Bearer setup/modification/release AALx link setup/modification/release

RAB Assignment Response ( )

RABs Setup Or Modified List

RABs Released List

RABs Queued List

RABs Failed to Set- up Or Modify List

RABs Failed to Release List

RAB ID

Cause

Radio Network Layer Cause

Transport Layer Cause

NAS Cause

Protocol Cause

Miscellaneous Cause

Non-standard Cause

e.g. 23: Invalid RAB

Parameter Combination

e.g. 98: Semantic

Error

Example Flow: RAB Assignment


source RNC

CN Iu edge node

target RNC

Relocation Required

T REL

OC

prep

(1): TRELOCallocRelocation Request(2): TRELOCcomplete

Relocation Request Acknowledge

T REL

OC

over

all Relocation Command

(1)

(2)

RNSAP: Relocation Commit

Relocation Detect RRC: UTRAN Mobility Information

RRC: UTRAN Mobility Information Confirm

Relocation CompleteIu Release Command

Iu Release Complete

Example Flow: S-RNC Relocation


• RNC: RelocationSupport•Identifies whether the Core Network supports the relocation of SRNC.•0 (Not supported), 1 (Supported); default: 1

• RNC: NRncRelocationSupport•This parameter identifies whether a neighbouring RNC supports relocation of SRNC.•0 (Not supported), 1 (Supported); default: 1

• RNC: NRncId•This parameter identifies the neighbour RNC. •A unique identification for an RNC node within the UTRAN.•[1 ... 4095], step 1

• RNC: TDataFwd•The timer is set when a RANAP:SRNS Data Forward Command message (or a RANAP:Relocation Command message) is received from the PS CN. •The timer is internally stopped in the SRNC when the RANAP SRNS Data Forwarding procedure has been completed.•[1 ... 10] s, step 1 s; default value: 4 seconds

NSN Parameters for S-RNC Relocation


• RNC: TRelocPrep•Specifies the maximum time for Relocation Preparation procedure in the source RNC.•The timer is set when a RANAP:Relocation Required message is sent. •The timer is stopped when a RANAP:Relocation Command or a Relocation Preparation Failure message is received. •[1 ... 16] seconds, step 1 second; default value: 6 seconds

• RNC: TRelocOverall•Specifies the maximum time for the protection of overall Relocation procedure in the source RNC.•The timer is set in the source RNC when a RANAP:Relocation Command message is received. •The timer is stopped when a RANAP:Iu Release Command is received, or the relocation procedure is cancelled.•The timer is set in the target RNC when a RANAP:Relocation Request Acknowledge message is sent.

•The timer is stopped when a RANAP:Relocation Complete message is sent, or the relocation procedure is cancelled.

•[1 ... 16] seconds, step 1 second; default value: 8 seconds

NSN Parameters for S-RNC Relocation Timer


Part II - RNSAP




RNCUTRAN

Iur: RNSAP

Relocation ExecutionRadio Link Management

Compressed Mode Control

CCCH Signalling Transfer Paging

Measurements on dedicated resources

RNCRNS RNS



PhyCH reconfiguration

etc.

CTCH resource management

RNSAP Services


NAS-PDU

SAPI

CN Domain Indicator

NAS-PDU

SAPI

CN Domain Indicator

source RNC

target RNCRelocation Commit ( )

Message Type

RANAP Relocation Information

D-RNTI

Transaction IDDirect Transfer

Information Items

NAS-PDU

SAPI

CN Domain Indicator

RAB Context Items

NAS-PDU

SAPI

CN Domain Indicator

NAS-PDU

SAPI

CN Domain Indicator

RAB ID

DL GTP-PDU SeqNo

UL GTP-PDU SeqNo

CN Domain IndicatorCN Domain IndicatorDL N-PDU SeqNo

CN Domain IndicatorCN Domain IndicatorUL N-PDU SeqNo

OP

OP

1 .. maxnoofDT (15)

1 .. maxnoofRABs (256)


Flow Example: Relocation Commit


source RNC

target RNC

Radio Link Setup Request ( )Radio Link Setup Response

Radio Link Setup RequestRadio Link Setup Failure

Message Type

D-RNTI

Transaction ID

S-RNTI

SRNC-Id

RL Information IEs

UL DPCH Information IEs

DL DPCH Information IEs

DSCH Information

DCH Information

Transmission GapPattern Sequence

Information

Active Pattern Sequence Info

Permanent NAS UE Identity


Flow Example: Radio Link Setup


• RNC: IurItem•This parameter consists of all the needed information from the neighbour RNC.

• RNC: IurList•This parameter is a collection of Iur-interfaces related to one RNC.

• RNC: IurUPSupport•This parameter indicates a user plane procedure support of the Iur connection.•This information is given separately for each neighbouring RNC. •If the user plane is not supported between SRNC and DRNC, initiation of a soft handover procedure is not possible.•0 (Not supported), 1 (Supported); default: 1

• etc.

Some NSN Parameters


Part III - NBAP




Iur: RANAP

Radio Link ManagementCell Configuration Mgt

DL Power Drift Correction

System Information Mgt Resource Event Status

Measurements on common & dedicated resources

RNC RNS



CTCH Management

CTCH resource management

Node B

Iub: NBAP

Configuration Alignment

General Error Reporting

NBAP Services


RNC

Node B

Radio Link Setup Request ( )Radio Link Setup Response

Radio Link Setup RequestRadio Link Setup Failure

Message Discriminator

Message Type

Transaction ID

CRNC Communi- cation Context ID



DCH Information

DSCH Information

TFCI2 bearer information IEs

RL Information IEs

Transmission GapPattern Sequence

Information

Active Pattern Sequence Info

Flow Example: Radio Link Setup


C-RNC

Node B

Common Measurement Report ( )

Message Discriminator

Message Type

Transaction ID

CHOICE Common Measurement Object Type

Cell

Measurement ID

RACH

CPCH

SFN

Common Measurement Initiation Request

Common Measurement Failure Indication

•Common Measurement Initation Response•Common Measurement Initation Failure

Common Measurement Termination Request

Note: NSN name for ‘Common Measurement Report’ is ‘Radio Resource Indication’ (RRI) message

Measurement on Common Resources


• There is a wide range of telecom and WBTS parameters; please refer to the WCDMA RAN Parameter Dictionary.

Some NSN Parameters


Part IV - Call Setup Example




RNCNode BUE3G-MSC

/VLR

RRC Connection Request (cause: Originating Conversational Call)

RRC Connection SetupRRC Connection Setup Complete

Initial Direct Transfer (...,CM Service Request,...)(cause: MOC establishment request) Initial UE Message

(LAI, CM Service Request,...)MM

RRC

MM

NBAP Radio Link Setup RequestRadio Link Setup Response

Downlink SynchronisationUplink Synchronisation



RNCNode BUE3G-MSC

/VLR

Security Mode Command Security Mode Command

Security Mode CompleteSecurity Mode Complete

Initial Direct Transfer (...,Setup,...)(called party address, codec capabilities) Direct Transfer

(...,Setup,...)

Direct Transfer (...,Call Proceeding,...)DL Direct Transfer (..., Call Proceeding,...)

Common ID (...,IMSI,...)

CC CC

RANAP

RANAP

RRC

Direct Transfer (...,Authentication Request,...)DL Direct Transfer (..., Authentication Request,...)

UL Direct Transfer (...,Authentication Response,...)(old LAI, old TMSI, MS classmark,...) Direct Transfer

(...,Authentication Response,...)

MM MM



RNCNode BUE3G-MSC

/VLR

CC

NBAP RANAP

RRC

RAB Assignment Request

Radio Link Reconfiguration Request

Radio Link Reconfiguration Response

Radio Bearer Setup

Radio Bearer Setup Complete RAB Assignment Response

Direct Transfer (...,Alerting,...)DL Direct Transfer (..., Alerting,...) CC

Direct Transfer (...,Connect,...)DL Direct Transfer (..., Connect,...)

UL Direct Transfer (...,Connect Acknowledge,...) Direct Transfer (...,Connect Acknowledge,...)

Media Flow


Documents

08_RN31558EN10GLA0_UTRAN Control Protocol Overview