Huawei WCDMA System Structure and Principle2

WCDMA System Overview

Course ContentsCourse Contents

Chapter 1 WCDMA SystemWCDMA System

Chapter 2 WCDMA ServicesWCDMA Services

Chapter 3 WCDMA System Structure

Chapter 4 WCDMA RAN Interface & Procedure

Chapter 5 WCDMA Basic Signaling Flow

WCDMA SYSTEMWCDMA SYSTEM We have 3 generations: 1stG analog cellular mobile communication, ex:

AMPS (advanced mobile phone system) uses 800MHZ north& south America &TACS( Total access communication system) uses 900MHZ Britain.

Disadvantages: no high speed services, limited types of services etc..

To Solve this disadvantages 2ndG was developed. 2ndG ex: DAMPS or IS-54 of USA using 800MHZ &

the IS-95 (CDMA mode) European using 800 or 1900MHZ.

2ndG designed as the TDMA support 64kbps, the GSM system uses FDD (Frequency Division Duplex) &TDMA modes and each carriers 8 channels 200KHZ B.W.

Advantages: transmission of voice& low speed data service.

2.5G address the medium rate data transmission includes GPRS.

3rdG system can provide multiple kinds of high quality multimedia service and implement global roaming and CDMA has a very large capacity which is 10 times than analog.

3rdG has 2 standardization: 3GPP(3rdG partner project) &3GPP2.

3GPP: it adopts the WCDMA technologies to construct a new RAN and a core switching network.

3GPP2:its adopts the cdma2000 is applied for radio access.

3rdG consist of a family concept: network part &radio interface part.

The comparison between the three major technical systems:System: WCDMA cdma2000 TD-SCDMAChip rate: 3.84Mcps Nx1.2288Mcps 1.28McpsSignal bandwidth:5MHZ Nx1.25MHZ 1.6MHZInheritance from: GSM narrowband CDMA GSMAir interface: WCDMA IS-95 WCDMACore network: GSM MAP ANSI-41 GSM MAP (Mobile Application Part)Using countries: Europe &Japan USA& Korea China

NOTE: ( N= 1, 3, 6, 9, 12)







WCDMA SERVICESWCDMA SERVICES There are many features of 3G services such as: Compatible backward with all the services

provided by GSM. The concept of multimedia service introduced. The real time service such as voice generally

have the QoS requirement. The typical service of 3G are CAMEL phase3

intelligent service needs to implement in UMTS &phase 2 needs to implement in providing the prepaid service &support services such as forwarding calls etc…

In 3G improvement of location &application of the system structure, LCS is very attractive, types of LCS:

Public security service (ex: emergency calls) Location based charging (ex: some LA’s set as

discount area) Enhanced call routing (ex:enables to the

nearest service point, gas station)

Location based information service (ex: deliver msg. to user advertisements in to attract customers)

Mobile yellow page (ex: same as ECR) Network enhancing services (ex: roaming

user that can use 3G system from other mobile network).

In 3G multimedia service is the first to be developed with a little bandwidth, voice service is the first to be developed with the use of high compression ratio MP3, types of services:

Circuit real time multimedia service: The implementation of multimedia service in the circuit domain.

Packet real time multimedia service: Multimedia service in the packet domain is mainly implemented via the SIP (Session Initiation protocol).

Non real time multimedia message service: This service is called MMS (Multimedia Message Service), a natural development of SMS.

UMTS Traffic ClassUMTS Traffic Class

Conversational

Streaming

Interactive

Background

UMTS Traffic ClassUMTS Traffic Class

Traffic class Conversational class Streaming class Interactive class Background- Preserve timerelation (variation)between informationentities of the stream

- Requestresponse pattern

- Destination is notexpecting the datawithin a certain time

Conversationalpattern (stringent andlow delay )

- Preserve payloadcontent

- Preserve payloadcontent

Example of theapplication

- voice,videotelephone

VOD, Web broadcast - Web browsing,network games

- backgrounddownload of emails

Fundamentalcharacteristics

- Preserve timerelation (variation)between informationentities of the stream







UMTS ArchitectureUMTS Architecture

Uu lu

USIM

ME

Cu

Node B

Node B

Node B

Node BRNC

RNC

lub lur

MSC/VLR GMSC

SGSN GGSN

HLR

PLMN PSTN ISDN,etc

INTERNET

External NetworksCNUTRANUE

UMTS Network Elements Structure

WCDMA System ArchitectureWCDMA System Architecture

Iu

UTRAN

UEUu

UTRAN ： UMTS Terrestrial Radio Access NetworkCN ： Core NetworkUE ： User Equipment

CN

UMTS (Universal Mobile Telecommunications System) is the 3rdG mobile telecommunication system by using the WCDMA air interface technology, including RAN &CN. UMTS system consist of UTRAN( UMTS Terrestrial Radio Access Network), CN &UE.

RAN used to process all radio related functions. CN used to process all voice calls and data

connections &implement the function of external network switching &routing, CN is divided into CS which covers MSC,VLR,IWF &GMSC, &PS which provides packet data services for subscriber including the SGSN &GGSN.

UTRAN System ArchitectureUTRAN System Architecture

RNS

RNC

RNS

RNC

Core Network

Node B Node B Node B Node B

Iu Iu

Iur

Iub IubIub Iub

UTRAN is divided into RNC (radio network controller) it implements connection establishment modulation/demodulation and Node B is the base station of WCDMA system.

UE is divided into ME &USIM (UMTS subscriber module).

R99 network structure has considered the 2G/3G compatibility so as to support the smooth transition of GSM/GPRS/3G, its main function includes MSC,VLR,HLR,AUC,EIR,GMSC,SGSN,GGSN.

R4 the function entities (SGSN &GGSN) of the PS domain remain unchanged. But have MSC server, GMSC server, CS-MGW( Circuit switched media gateway) &T-SGW( Transport signaling Gateway).

RAN InterfacesRAN Interfaces

VMSC/VLRIu-CS

GsSGSN

GMSC GGSN

BSS RNC

BTS BTS NODE B NODE B

Iu-PSA Gb

Abis Iub

Um Uu

Common Protocol Model of UTRAN Common Protocol Model of UTRAN InterfacesInterfaces

ApplicationProtocol

DataStream(s)

ALCAP(s)

TransportNetwork

Layer

Physical Layer

SignallingBearer(s)

TransportUser

NetworkPlane

Control Plane User Plane

TransportUser

NetworkPlane

Transport NetworkControl Plane

RadioNetwork

Layer

SignallingBearer(s)

DataBearer(s)

The principle of interface protocol architecture is the logical mutual-independence between layers and planes. Protocol layers of a specified protocol version, or even all layers in a plane can be modified if required in the future.

Basic NotionsBasic Notions

UE Working Mode and State Serving RNC 、 Drift RNC and Control RNC Source RNC and Target RNC

UE statesUE states

CELL_DCH CELL_FACH

CELL_PCHURA_PCH

IDLE

DEAD - Scanning networks (PLMN)- ”Camp on” cell

- Monitor paging channel- cell re-selection

- Dedicated Channel- Radio bearers Transmission Services - upper layer Signaling

trigger (CN)

- Reduce action ， DTX ， and save power

RRC connection

SRNC/DRNCSRNC/DRNC

In WCDMA system ， notion of SRNC/DRNC is introduced because the existence of Iur Interface

In brief, the RNC directly connected to CN and controlling all the UE’s resources is called SRNC(serving RNC) of this UE

The RNC with no connection to CN but only providing resources for UE is called DRNC(Drift RNC) of this UE

A UE in connection state has at least and only one SRNC, but can has 0 or multiple DRNCs

CN

SRNC DRNCIu Iur

Source RNC/Target RNCSource RNC/Target RNC

SRNC Relocation is the process of switching the SRNC of a specific UE.

Source RNC is the SRNC before SRNC Relocation and Target

RNC is the SRNC after SRNC Relocation Source RNC and Target RNC refer to different RNCs during a

SRNC Relocation process

CNCN

Source RNC

TargetRNC

ServingRNC

Iu IuIur RNC

UTRAN Interface Protocols and UTRAN Interface Protocols and FunctionsFunctions

Iu Interface

Iur Interface

Iub Interface

Uu Interface

Iu Interface System StructureIu Interface System Structure

Core Network (CN)UTRAN

Node B

Node B

Node B

Node B

RNC

Iu Interface

Iu-CS

CSDomain

PSDomain

Iu-PS

RNC

Iu-CS Interface Protocol Stack StructureIu-CS Interface Protocol Stack Structure

Q.2150.1

Q.2630.1

RANAP Iu UP ProtocolLayer

TransportNetwork

Layer

Physical Layer

TransportUser

NetworkPlane


TransportUser

NetworkPlane


RadioNetwork

Layer

ATM

SSCOP

AAL5

SSCOP

SSCF-NNI

AAL2AAL5

MTP3bMTP3b

SCCP

SSCF-NNI

Iu-PS Interface Protocol Stack StructureIu-PS Interface Protocol Stack Structure

SSCF-NNI

SSCOP

AAL5

IP

SCTP

SCCP

SSCF-NNI

MTP3-BM3UA

RANAPIu UP Protocol

Layer

TransportNetwork

Layer

Physical Layer

TransportUser

NetworkPlane


TransportUser

NetworkPlane


RadioNetwork

Layer

ATM

AAL5

IP

UDP

GTP-U

Physical Layer

ATM

Iu Interface Functions(1)Iu Interface Functions(1) Mobility Management

– Location Area Report– SRNS Relocation– Hard handover between RNCs and inter-system handover

Radio Access Bearer （ RAB ） Management– Establishment, Modification and Release of RAB

Iu data transmission– normal data transmission– abnormal data transmission– Transparent transmission of UE-CN connection information

Iu Interface Functions(2)Iu Interface Functions(2)

– Paging– Iu Release– Security Mode Control– Overload Control– Common UE ID （ IMSI ） Management– Iu Signaling Trace Management– Iu Interface Abnormality Management

UTRAN Interfaces Protocols and UTRAN Interfaces Protocols and FunctionsFunctions

Iu Interface Iur Interface Iub Interface Uu Interface

Iur Interface Protocol Stack Structure Iur Interface Protocol Stack Structure

SSCF-NNI

SSCOP

MTP3-B

AAL5

IP

SCTP

SCCP

AAL5

SSCF-NNI

STC (Q.2150.1)

RNSAP Iur DataStream(s)

TransportNetwork

Layer

Physical Layer

TransportUser

NetworkPlane


TransportUser

NetworkPlane


RadioNetwork

Layer

ATM

ALCAP(Q.2630.1)

AAL2

SSCF-NNI

SSCOP

MTP3-B

IP

SCTPSSCF-NNI

M3UA M3UA

Iur Interface Functions(1)Iur Interface Functions(1) Support Basic Mobility Functions between RNCs

– Support SRNC relocation– Cell Update and URA Update between RNCs– Paging between RNCs– Protocol Error Report

Channel Functions– Establish, Modify or Release Dedicated Channels in

DRNC during handover– Transmission of DCH TB(Transmission Block) on Iur– Management of RL(Radio Link) in DRNS by Dedicated

Measurement Procedure and Filter Control– RL Management ， Compressed Mode Management

UTRAN Interfaces Protocols and FunctionsUTRAN Interfaces Protocols and Functions

Iu Interface

Iur Interface

Iub Interface

Uu Interface

Iub Interface Protocol StackIub Interface Protocol Stack

Node BApplication Part

(NBAP)

AAL Type 2

ALCAP

TransportLayer

Physical Layer

RadioNetworkLayer

Radio NetworkControl Plane

TransportNetwork

Control Plane

DCH

FP

RAC

H FP

ATM

DSCH

FP

AAL Type 5

User Plane

SSCF-UNI

SSCOP

AAL Type 5

SSCF-UNI

SSCOP

Q.2630.1

Q.2150.2

FACH

FP

PCH FP

USCH

FP

CPCH FP

Iub Interface Functions(1)Iub Interface Functions(1)

Common Functions– Common Transport Channel Management– Iub Common Channel Data Transmission– Logical O&M of Node B （ maintenance functions such as

cell configuration Management ， Fault Management ， Block Management, etc. ）

– System Information Management– Common Measurement– Resource Verification– Abnormality Management– Timing and Synchronization Management

Iub Interface Functions(2)Iub Interface Functions(2)

Dedicated Functions– Dedicated Transport Channel Management – Radio Link(RL) Monitoring – Dedicated Measurement Management– Timing and Synchronization Management– Up-link outer loop Power Control– Iub Dedicated Data transmission– Balance on down-link power drifting– Compressed Mode Control

UTRAN Interfaces Protocols and FunctionsUTRAN Interfaces Protocols and Functions

Iu Interface

Iur Interface

Iub Interface

Uu Interface

Uu Interface Protocol Stack StructureUu Interface Protocol Stack Structure

L3

cont

rol

cont

rol

cont

rol

cont

rol

LogicalChannels

TransportChannels

C-plane signalling U-plane information

PHY

L2/MAC

L1

RLC

DCNtGC

L2/RLC

MAC

RLCRLC

RLCRLC

RLCRLC

RLC

Duplication avoidance

UuS boundary

BMC L2/BMC

RRCcontrol

PDCPPDCP L2/PDCP

DCNtGC

Uu InterfaceUu Interface

Channel StructurePhysical ChannelTransport ChannelLogical Channel

Physical Channel StructurePhysical Channel Structure

Dedicated Physical Channel

– DPDCH: Dedicated Physical Data Channel

– DPCCH: Dedicated Physical Control Channel Common Physical Channel

– Uplink: • PRACH: Physical Random Access Channel• PCPCH: Physical Common Packet Channel

– Downlink: • CCPCH: Common Control Physical Channel• SCH: Synchronization Packet Channel• PDSCH: Physical Downlink Shared Channel• PICH: Paging Indicator Channel• CPICH: Common Pilot Channel

Transport Channel StructureTransport Channel Structure

Dedicated Transport Channel– DCH

Common Transport Channel– BCH: Broadcast Channel(Downlink)

– PCH: Paging Channel(Downlink)

– FACH: Forward Access Channel(Downlink)

– RACH: Random Access Channel(Uplink)

– CPCH: Common Packet Channel(Uplink, Optional)

– DSCH: Downlink Shared Channel(Downlink, Optional)

Transport/Physical Channel MappingTransport/Physical Channel MappingTransport Channels

DCH

RACH

CPCH

BCH

FACH

PCH

DSCH

Physical Channels

Dedicated Physical Data Channel (DPDCH)

Dedicated Physical Control Channel (DPCCH)

Physical Random Access Channel (PRACH)

Physical Common Packet Channel (PCPCH)

Common Pilot Channel (CPICH)

Primary Common Control Physical Channel (P-CCPCH)

Secondary Common Control Physical Channel (S-CCPCH)

Synchronisation Channel (SCH)

Physical Downlink Shared Channel (PDSCH)

Acquisition Indicator Channel (AICH)

Access Preamble Acquisition Indicator Channel (AP-AICH)

Paging Indicator Channel (PICH)

CPCH Status Indicator Channel (CSICH)

Collision-Detection/Channel-Assignment Indicator

Channel (CD/CA-ICH)

Logical Channel StructureLogical Channel Structure

Control Channels– BCCH: Broadcast Control Channel

– PCCH: Paging Control Channel(Downlink)

– DCCH: Dedicated Control Channel(bi-directional) Traffic Channels

– CCCH: Common Control Channel(bi-directional)

– DTCH: Dedicated Traffic Channel(bi-directional)

– CTCH: Common Traffic Channel(Downlink)

Logical/Transport Channel MappingLogical/Transport Channel Mapping

BCH PCH DSCHFACHRACH DCH

BCCH-SAP

DCCH-SAP

CCCH-SAP

PCCH-SAP

DTCH-SAP

TransportChannels

MAC SAPs

FAUSCH USCH(TDD only)

CPCH(FDD only)

CTCH-SAP

SHCCH-SAP(TDD only)

Uu Interface ProtocolUu Interface Protocol

L3: Network Layer – RRC: Radio Resource Control

L2: Data Link Layer– PDCP: Packet Data Convergence Protocol

– RLC: Radio Link Control Protocol

– MAC: Medium Access Control Protocol

– BMC: Broadcast/Multicast Control L1: Physical Layer

Uu Interface L1 Functions(1)Uu Interface L1 Functions(1) Multiplexing of transport channels and de-multiplexing of

encoded composite channels Mapping of encoded composite transport channels on physical

channels Macro-diversity distribution/combining and soft handover

execution Error detection on transport channels and indication to higher

layers FEC encoding/decoding and interleaving/de-interleaving of

transport channels Rate matching of coded transport channels to physical channels

Uu Interface L1 Functions(2)Uu Interface L1 Functions(2)

closed-loop power control open-loop power control Modulation and spreading/demodulation and de-spreading

of physical channels Synchronization between frequency and time (chip, bit,

slot, frame) Radio characters measurements (FER, SIR, Interference

power) and indication to higher layers Compressed mode support Diversity of Transmission/Receiving







BASIC SIGNALING PROCEDURESBASIC SIGNALING PROCEDURES

We have two stratum signaling procedures: Access stratum: such as RRC( radio resource

control) &RANAP( radio access network application protocol) layers refer to the procedures of which radio access stratum equipment such as RNC &NodeB.

Non-access stratum: refer to the procedure in which only UE &CN participate. The UE may operates in one or two modes: Idle mode & Connected mode. After being switched on the UE operates in Idle mode and is identified as non-access stratum such as IMSI, TMSI or P-TMSI. UTRAN doesn’t save the information of the UE in this mode.

After establishing an RRC connection the UE shifts from the idle mode to the connected mode,

UMTS ArchitectureUMTS Architecture

Uu lu

USIM

ME

Cu

Node B

Node B

Node B

Node BRNC

RNC

lub lur

MSC/VLR GMSC

SGSN GGSN

HLR

PLMN PSTN ISDN,etc

INTERNET

External NetworksCNUTRANUE

UMTS Network Elements Structure

Radio resource management procedures:Radio resource management procedures: RRC connection setup procedure: each UE

has one RRC connection only. When the non access layer of the UE requests to establish a signaling connection in the idle mode the UE will initiate the RRC connection.

Signaling setup procedure: after the RRC connection between the UE and the UTRAN is successfully setup the UE sets up signaling connection with the CN via the RNC .

RAB establishment: Radio Access Bearer refers to the user plane bearer that is used to transfer voice, data &multimedia services between UE &CN.

Call release procedure: is a procedure that the RRC connection release procedure it falls into two types: UE initiated release &CN initiated release. The difference between the two release types lies in who sends the call release request message of the upper layer first, though the final resource release is initiated by the CN.

Hand over procedure: when the cell or the mode (TDD/FDD) used by the UE changes.

SRNS (serving radio network subsystem): the RNC relocation refers to that the SRNC of the UE changes from one RNC to another RNC, it is divided into two cases based on UE location at the time of relocation: static relocation (UE not involved) & associated relocation (UE involved).

Call overall ProceduresCall overall ProceduresNetwork side Start1 、 Initialize equipment2 、 Process system

broadcast

Step 1Handset Power on1 、 cell reselection2 、 Location registration3 、 Waiting for call

Step 2Paging UE

Step 3RRC connection

Establish

Step 4NAS signaling

connection establish

Step 5RAB set up1 、 synchronous set up2 、 asynchronous set up

Step 6RAB/RB modification

Step 6Transport channel

reconfiguration

Step 6Physical channel reconfiguration

Step 6Soft/hard handover

Step 6URA update

Step 6Cell update

Step 6Handover with GSM

Step 7RRC connection

release

Step 8Waiting for call again1 、 cell selection2 、 wait for call

Originating Call Procedure (1)Originating Call Procedure (1)

Downlink Synchronisation

UE Node BServing RNS

ServingRNC

DCH-FPDCH-FP

RRCRRC CCCH : RRC Connection Request

NBAP Radio Link Setup ResponseNBAP

NBAP Radio Link Setup Request

CCCH : RRC Connection Setup

Start RX

Start TX

RRC

RLC

RRCDCCH : RRC Connection Setup Complete

DCH-FPDCH-FPUplink Synchronisation

NBAP

Q.AAL2Q.AAL2

Q.AAL2 Establish Request

Establish Confirm

Inital Direct Transfer

CN

DCCH :RRC

RLC

RRC

RRC

RRC

Q.AAL2

DCCH : RRC Connection Setup Complete ack




RRC

RANAPRANAP


ServingRNC CN

Initial UE Message

RANAPRANAP

DCCH

Direct Transfer

RANAPRANAP Direct Transfer

:

Direct Transfer DCCH ::

Direct Transfer DCCH ::

RRCDownlink

RRC

RRC

Uplink

RRC

RRC

RRC

(CM Service Request)

(CM Service Accept)

(Setup)

DCCH :

DCCH : Downlink

Uplink

Direct Transfer

Direct Transfer RRCRRC

RRC

RRC

RRC


(Call Proceeding)




ServingRNC CN

DCCH :

DCCH : Downlink

Uplink

Direct Transfer

Direct Transfer RRCRRC

RRC

RRC

RRCRAB Assignment Request

RANAPRANAPEstablishment( )

Q.AAL2Q.AAL2


Establish Confirm

Q.AAL2

NBAPPrepare NBAP

Radio Link Reconfiguration

NBAPRadio Link ReconfigurationNBAP Ready


UENode B

Serving RNS ServingRNC

CN

DCCH : Radio Bearer Setup

DCCH : Radio Bearer Setup Complete

Q.AAL2Q.AAL2


Establish Confirm

Q.AAL2

Downlink Synchronisation

Uplink Synchronisation

Radio Link Reconfiguration

NBAP

NBAP

NBAP

NBAP

NBAP

NBAP

Apply new transport format set

RRC

RRC

RRC

RRC

RAB Assignment ResponseRANAP RANAPEstablishment( )

Commit

DCCH : Radio Bearer Setup Complete ackRLCRLC


UENode B


CN

RRC


RRC


(Alerting)

(Connect)

RRC

RRC


(Connect Acknowledge)

RRC


(Rlease Complete)

RANAPRANAP Direct Transfer (Release)

RANAPRANAP Direct Transfer (Disconnect)

RRC

DCCH ::

DCCH ::

Downlink

Uplink

Direct Transfer

Direct Transfer

RRC

RRC

DCCH :: Downlink

DCCH :: Downlink

Direct Transfer RRC

DCCH :: UplinkRRC Direct Transfer

Direct Transfer RRC

DCCH :: Uplink Direct Transfer RRC


UENode B


CN

RANAPRANAP

RANAPRANAP

Iu Release Command

Iu Release Complete

Q.AAL2Q.AAL2

Q.AAL2Q.AAL2 Release Request

Release Complete

Q.AAL2Q.AAL2

Q.AAL2Q.AAL2 Release Request

Release Complete

DCCH : RRC Connection

DCCH : RRC Connection

Release

ReleaseComplete

NBAP Radio Link Deletion

NBAP Radio Link Deletion

NBAP

NBAPComplete

Soft Handover Illustration (Intra Soft Handover Illustration (Intra RNC)RNC)

Before Soft Handover After Soft Handover

CN

SRNC

NodeBNodeB

CN

SRNC

NodeBNodeB

CN

SRNC

NodeBNodeB

During Soft Handover

Soft Handover Flow (Intra RNC add branch)Soft Handover Flow (Intra RNC add branch)

Decision to setupnew RL

7. DCCH : Active Set Update Complete

6.DCCH: Active Set Update Command

UE Node B(new) SRNC

NBAP1. Radio Link Setup RequestNBAP

NBAP2. Radio Link Setup ResponseNBAP

3 ALCAP Iub Data Transport Bearer Setup

Start RX description

DCH-FP4. Downlink SynchronizationDCH-FP

DCH-FP5.Uplink SynchronizationDCH-FP


RRC

RRC

RRC

RRC

Soft Handover Flow (Intra-RNC delete branch)Soft Handover Flow (Intra-RNC delete branch)

Decision to deletea RL

2. DCCH : Active Set Update Complete

1.DCCH: Active Set Update Command

UE Node B(old) SRNC

NBAP3. Radio Link Deletion RequestNBAP

NBAP4. Radio Link Deletion ResponseNBAP

RRC

RRC

RRC

RRC

Stop RX and Tx

5 ALCAP Iub Transport Bearer release

Soft Handover Illustration (Inter-RNC)Soft Handover Illustration (Inter-RNC)

Before Soft Handover After Soft Handover

Radio Link(RL) is added and deleted simultaneously

CN

SRNC RNC

NodeB NodeBNodeB

CN

SRNC RNC

NodeB NodeBNodeB

Soft Handover Flow (Inter-RNC)Soft Handover Flow (Inter-RNC)

7. Uplink Synchronization

RNSAP RNSAP1. Radio Link Setup Request

Start TX description

RNSAP RNSAP

4. Radio Link SetupResponse

NBAP NBAP2. Radio Link Setup Request

NBAP NBAP3. Radio Link Setup Response


Decision to setupnew RL and

release old RL

NBAP 10. Radio Link Deletion Request

NBAP NBAP11. Radio Link Release Response

Stop RX and TX

12. ALCAP Iub Data Transport Bearer Release

RRCRRC 9. DCCH : Active Set Update Complete

RRCRRC 8. DCCH: Active Set Update Command

[Radio Link Addition & Deletion]

NBAP

UE Node BDrift RNS

Node BServing RNS

Drift RNC Serving RNC

ALCAP Iur Bearer Setup5. ALCAP Iub Data Transport Bearer Setup

DCH-FPDCH-FP

DCH-FPDCH-FP

6. Downlink Synchronization

““ THANK YOUTHANK YOU””

Done By:Done By: UAE UAE TSD TSD DepartmentDepartment

Huawei WCDMA System Structure and Principle2

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