3 WCDMA UTRAN Interface and Signaling Procedure ISSUE 1.21

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Transcript of 3 WCDMA UTRAN Interface and Signaling Procedure ISSUE 1.21

Revision RecordCourse Code OWA10 Developer/Modifier SUNTAN GUOYANG GUOYANG Product WRAN Time 2009-2-2 2009-04-15 2009-12

Dont Print This PageProduct Version ALL Approver LIANGJIE LIANGJIE LIANGJIE Course Version ISSUE 1.20 New/Update

Add notesBUG correction BUG correction

Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

Page0

WCDMA UTRAN Interface and Signaling Procedure

www.huawei.com

Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

Objectives

Upon completion of this course, you will be able to:Understand UTRAN interface and structure Understand the definitions about UTRAN network elements Understand UTRAN signaling procedure

Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

Page2

Contents1. UTRAN Network Overview 2. Basic Concepts about UTRAN 3. UTRAN Signaling Procedure

Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

Page3

UMTS Network StructureCNCore Network CS Iu-CS RNS Iur RNC RNC Iub NodeB Iub NodeB Iub NodeB PS Iu-PS CS Iu-CS RNS PS Iu-PS

UTRANIub NodeB

Uu

UECopyright 2008 Huawei Technologies Co., Ltd. All rights reserved. Page4

Uu InterfaceGC Nt DC

Duplication avoidanceGC C-plane signaling Nt DC U-plane information control UuS boundary

control

control

RRCcontrol control

L3radio bearer PDCP PDCP BMC RLC

L2/PDCP L2/BMC L2/RLClogical channel

RLC

RLC

RLC

RLC RLC RLC

RLC

MAC PHYCopyright 2008 Huawei Technologies Co., Ltd. All rights reserved. Page5

L2/MACtransport channel

L1

General Protocol Mode for UTRAN Terrestrial Interface

The structure is based on the principle that the layers and planes are logically independent of each other.Radio Network Layer Control Plane Application ProtocolTransport Network User Plane Transport Network Control Plane

User Plane Data Stream(s)

Transport Network Layer

Transport Network User Plane

ALCAP(s) Signaling Bearer(s) Signaling Bearer(s)Physical Layer

Data Bearer(s)

Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

Page6

General Protocol Mode for UTRAN Terrestrial Interface

The structure is based on the principle that the layers and planes are logically independent of each other.Radio Network Layer Control Plane Application ProtocolTransport Network User Plane Transport Network Control Plane

User Plane Data Stream(s)

Transport Network Layer

Transport Network User Plane

ALCAP(s) Signaling Bearer(s) Signaling Bearer(s)Physical Layer

Data Bearer(s)

Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

Page7

RNL Control Plane Application ProtocolCNRANAP RRC RNSAP

UE

RNCNBAP

RNC

NodeBNBAP RANAP RNSAP RRC Node B Application Part Radio Access Network Application Part Radio Network Subsystem Application Part Radio Resource ControlPage8

Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

Iu-CS Interface (based on ATM)Radio Network LayerControl Plane RANAP User plane Iu UP

Transport Network User Plane

Transport Network Control Plane

Transport Network User Plane

Transport Network Layer

ALCAPSCCP A MTP3-B SAAL NNI B MTP3-B SAAL NNI AAL2 PATH

ATM Physical Layer

Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

Page9

Iu-CS Interface (based on IP)Radio Network LayerControl Plane RANAP User plane Iu UP

Transport Network User Plane

Transport Network User Plane

Transport Network Layer

SCCP M3UA SCTP IP DATA LINK Physical Layer

RTP/RTCP UDP IP DATA LINK

Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

Page10

Iu-PS Interface (based on ATM)Radio Network LayerControl Plane RANAP User plane Iu UP

Transport Network Layer

Transport Network User Plane SCCP MTP3-B

Transport Network User Plane GTP-U C UDP IP AAL Type 5

SAAL NNI

ATM Physical Layer

Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

Page11

Iu-PS Interface (based on IP)Radio Network LayerControl Plane RANAP User plane Iu UP

Transport Network User Plane

Transport Network User Plane

Transport Network Layer

SCCP M3UA SCTP IP DATA LINK Physical Layer GTP-U UDP IP DATA LINK

Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

Page12

Iub Interface (based on ATM)Radio Network Layer Control Plane NBAP NCP CCP Transport Network Control Plane Transport Network Layer Transport Network User Plane ALCAP Transport Network User Plane User plane Iub FP

SAAL UNI

SAAL UNI

AAL2 PATH

ATM Physical Layer

Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

Page13

Iub Interface (based on IP)Radio Network Layer Control Plane NBAP NCP CCP User plane Iub FP

Transport Network Layer

Transport Network User Plane SCTP IP DATA LINK Physical Layer

Transport Network User Plane

UDP IP DATA LINK

Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

Page14

Iur Interface (based on ATM)Radio Network LayerControl Plane RNSAP User plane Iur Data Stream Transport Network Control Plane

Transport Network User Plane

Transport Network User Plane

Transport Network Layer

ALCAPSCCP A MTP3-B SAAL NNI B MTP3-B SAAL NNI AAL2 PATH

ATM Physical Layer

Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

Page15

Iur Interface (based on IP)Radio Network LayerControl Plane RNSAP User plane Iur Data Stream

Transport Network User Plane

Transport Network User Plane

Transport Network Layer

SCCP M3UA SCTP IP DATA LINK Physical Layer IP UDP

DATA LINK

Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

Page16

Contents1. UTRAN Network Overview 2. Basic Concepts about UTRAN 3. UTRAN Signaling Procedure

Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

Page17

SRNC / DRNCCN

SRNC

DRNC

Interface Data

SRNC and DRNC are concepts for a connected UE. The SRNC handles the connection to one UE, and may borrow radio resources of a certain cell from the DRNC. Drift RNCs support the Serving RNC by providing radio resources A UE in connection state has at least one and only one SRNC, but can has 0 or multiple DRNCsPage18

Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

RAB, RB and RL

RAB RB UE RL NodeB

RNC

CN

UTRAN

Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

Page19

UE Working Modes and States

Idle Mode Connected ModeCELL_DCH CELL_FACH CELL_PCH URA_PCH

Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

Page20

Idle Mode

The UE has no relation to UTRAN, only to CN. For data transfer, a signaling connection has to be established.

UE camps on a cellIt enables the UE to receive system information from the PLMN UE can monitor PICH of a cell for paging

The idle mode tasks can be divided into three processes:PLMN selection and reselection Cell selection and reselection Location registration

Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

Page21

Connected Mode

When UE is in connected modeThe UE position can be known on different levels:

Cell level (CELL_DCH/CELL_FACH/CELL_PCH) UTRAN Registration Area (URA) level (URA_PCH)

The UE can use different types of channels in connected mode

Dedicated transport channels (CELL_DCH) Common transport channels (CELL_FACH)

Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

Page22

Connected Mode

Cell-DCHIn active state Communicating via its dedicated channels UTRAN knows which cell UE stays in

Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

Page23

Connected Mode

Cell-FACHIn active state Few data to be transmitted both in uplink and in downlink. There is no need to allocate dedicated channel for this UE Downlink uses FACH and uplink uses RACH UE needs to monitor the FACH for its information UTRAN knows which cell the UE stays in

Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

Page24

Connected Mode

Cell-PCHNo data to be transmitted or received Monitor PICH, to receive its paging UTRAN knows which cell the UE stays in UTRAN has to update cell information of UE when UE roams to another cell Lower the power consumption of UE

Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

Page25

Connected Mode

URA-PCHNo data to be transmitted or received Monitor PICH, to receive its paging UTRAN only knows which URA (which consists of multiple cells) that UE stays UTRAN updates UE information only after UE has roamed to other URA A better way to reduce the resource occupancy and signaling transmission

Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

Page26

UE Working Modes and States- Reduce activity further - Avoid unnecessary signaling

RRC Connection

- Reduce activity, DRX, and save power

URA_PCH

CELL_PCH

CELL_DCH- Dedicated channel - Common service, such as voice

CELL_FACH- Common channel - PS service with few data t