01-01 cell setup procedure

1 Cell Setup Procedure

About This Chapter

The cell setup procedure is performed to set up a WCDMA cell. This chapter describes cell setupin terms of protocols, triggering conditions, signaling procedure of successful cell setup,signaling tracing on the RNC LMT, and elementary procedures. This chapter also describes theelementary procedures in terms of functions, triggering conditions, procedure, and signaling inabnormal conditions.

1.1 Protocols Related to Cell SetupThe cell setup procedure complies with some 3GPP TS25 protocols and an ITU-T protocol.

1.2 Triggering Conditions of Cell SetupCell setup can be triggered either through execution of an MML command or with a resourceaudit response from the NodeB.

1.3 Signaling Procedure of Successful Cell SetupThis part describes the signaling procedure of successful cell setup. For the messages related tocell setup failures, refer to the elementary procedures.

1.4 Using the RNC LMT to Trace the Cell Setup ProcedureThe signaling tracing function of the RNC LMT can be used to trace the signaling of cell setup.

1.5 Elementary Procedures of Cell SetupThis part describes the elementary procedures of cell setup in terms of triggering conditions andsignaling procedures in normal and abnormal conditions.

RANSignaling Analysis Guide 1 Cell Setup Procedure

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1.1 Protocols Related to Cell SetupThe cell setup procedure complies with some 3GPP TS25 protocols and an ITU-T protocol.

The compliance protocols are as follows:l 3GPP TS25.427 "UTRAN Iur/Iub interface user plane protocol for DCH data streams"

l 3GPP TS25.433 "UTRAN Iub interface Node B Application Part (NBAP) signaling"

l 3GPP TS25.435 "UTRAN Iub interface user plane protocols for Common TransportChannel data streams"

l ITU-T Q.2630 "AAL type 2 Signalling Protocol"

1.2 Triggering Conditions of Cell SetupCell setup can be triggered either through execution of an MML command or with a resourceaudit response from the NodeB.

Table 1-1 describes the two triggering conditions.

Table 1-1 Triggering conditions of cell setup

TriggeringCondition Description Feature

Cell setup is initiatedby the RNC LMT.

Run the ACT CELL command onthe RNC LMT in online mode.

The resource auditprocedure is excluded fromcell setup.

The RNC receives aresource auditresponse from theNodeB.

After receiving the resource auditresponse from the NodeB, the CRNCsends a cell setup request to theNodeB if the cell setup requirementsare fulfilled.

The resource auditprocedure is involved incell setup.

1.3 Signaling Procedure of Successful Cell SetupThis part describes the signaling procedure of successful cell setup. For the messages related tocell setup failures, refer to the elementary procedures.

Figure 1-1 shows the signaling procedure of successful cell setup.

1 Cell Setup ProcedureRAN

Signaling Analysis Guide

1-2 Huawei Technologies Proprietary Issue 01 (2007-04-20)

Figure 1-1 Signaling procedure of successful cell setup

Note the following information about the procedure shown in Figure 1-1:

l The resource status indication and resource audit procedures are involved in cell setup onlywhen the cell setup is triggered with a resource audit response from the NodeB.

l The physical shared channel reconfiguration procedure is involved in cell setup only whenthe cell to be set up is a High Speed Downlink Packet Access (HSDPA) cell.

l If IP transport is applied to the Iub interface, the Iub user plane setup procedure is excludedfrom cell setup.

1.4 Using the RNC LMT to Trace the Cell Setup ProcedureThe signaling tracing function of the RNC LMT can be used to trace the signaling of cell setup.

Prerequisitel The RNC LMT works properly.

l You have logged in to the RNC with an account authorized to perform tracing management.

Context

Table 1-2 lists the messages to be traced.



Table 1-2 Messages to be traced

InterfacesandProtocols toBe Traced

Message Name on the LMT Message Name in Protocols

Iub

NBAP_AUDIT_REQ AUDIT REQUEST

NBAP_AUDIT_RSP AUDIT RESPONSE

NBAP_AUDIT_FAIL AUDIT FAILURE

NBAP_CELL_SETUP_REQ CELL SETUP REQUEST

NBAP_CELL_SETUP_RSP CELL SETUP RESPONSE

NBAP_CELL_SETUP_FAIL CELL SETUP FAILURE

NBAP_CELL_DEL_REQ CELL DELETION REQUEST

NBAP_CELL_DEL_RSP CELL DELETION RESPONSE

NBAP_COMM_TRANSP_CH_SETUP_REQ

COMMON TRANSPORT CHANNELSETUP REQUEST

NBAP_COMM_TRANSP_CH_SETUP_RSP

COMMON TRANSPORT CHANNELSETUP RESPONSE

NBAP_COMM_TRANSP_CH_SETUP_FAIL

COMMON TRANSPORT CHANNELSETUP FAILURE

NBAP_SYS_INFO_UPDATE_REQ

SYSTEM INFORMATION UPDATEREQUEST

NBAP_SYS_INFO_UPDATE_RSP

SYSTEM INFORMATION UPDATERESPONSE

NBAP_SYS_INFO_UPDATE_FAIL

SYSTEM INFORMATION UPDATEFAILURE

NBAP_PSCH_RECFG_REQ PHYSICAL SHARED CHANNELRECONFIGURATION REQUEST

NBAP_PSCH_RECFG_RSP PHYSICAL SHARED CHANNELRECONFIGURATION RESPONSE

NBAP_PSCH_RECFG_FAIL PHYSICAL SHARED CHANNELRECONFIGURATION FAILURE

NBAP_COMM_MEAS_INI_REQ

COMMON MEASUREMENTINITIATION REQUEST

NBAP_COMM_MEAS_INI_RSP

COMMON MEASUREMENTINITIATION RESPONSE

NBAP_COMM_MEAS_INI_FAIL

COMMON MEASUREMENTINITIATION FAILURE




InterfacesandProtocols toBe Traced

Message Name on the LMT Message Name in Protocols

NBAP_COMM_MEAS_RPRT COMMON MEASUREMENT REPORT

Q.AAL2 No message name needs to bespecified. –

Procedure

Step 1 Create an Iub tracing task by referring to Creating an RNC Tracing Task.Figure 1-2 shows an example of Iub signaling tracing result.

Figure 1-2 Example of Iub signaling tracing result

In practice, the messages transmitted during cell setup depend on the configured data. In thisexample, an HSDPA cell is set up. During the cell setup, the common transport channel setupprocedure is performed to set up a Secondary Common Control Physical Channel (S-CCPCH),a Physical Random Access Channel (PRACH), a Paging Indicator Channel (PICH), and anAcquisition Indicator Channel (AICH). The S-CCPCH carries two Forward Access Channels(FACHs) and a Paging Channel (PCH). The PRACH carries a Random Access Channel (RACH).

Step 2 Create a Q.AAL2 tracing task by referring to Creating an RNC Tracing Task.Figure 1-3 shows an example of Q.AAL2 protocol tracing result.



Figure 1-3 Example of Q.AAL2 protocol tracing result

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1.5 Elementary Procedures of Cell SetupThis part describes the elementary procedures of cell setup in terms of triggering conditions andsignaling procedures in normal and abnormal conditions.

1.5.1 Resource Status Indication ProcedureThe NodeB performs the resource status indication procedure to report its physical resources tothe Control RNC (CRNC).

1.5.2 Resource Audit ProcedureThe CRNC performs the resource audit procedure to audit the configuration and status of thelogical resources in the NodeB. The audit may let the CRNC know the logical resources of theNodeB and re-synchronize its resources with those of the NodeB.

1.5.3 Cell Setup ProcedureThe cell setup procedure is performed to set up a cell in the NodeB.

1.5.4 Common Transport Channel Setup ProcedureThe common transport channel setup procedure is performed to establish the necessary resourcesin the NodeB, regarding the following channels: S-CCPCH, PICH, PRACH, AICH, FACH,PCH, and RACH.

1.5.5 Iub User Plane Setup ProcedureThe Iub user plane setup procedure is performed to set up bearers for data transmission on theIub interface.

1.5.6 System Information Update ProcedureThe system information update procedure is performed for the NodeB to schedule and updatethe system information segments, which are broadcast on the Broadcast Channel (BCH),according to the parameters in the SYSTEM INFORMATION UPDATE REQUEST message.

1.5.7 Physical Shared Channel Reconfiguration ProcedureThe physical shared channel reconfiguration procedure is performed for the NodeB toreconfigure the physical channels according to the PHYSICAL SHARED CHANNELRECONFIGURATION REQUEST message sent from the CRNC.

1.5.8 Common Measurement Initiation ProcedureThe common measurement initiation procedure is performed for the CRNC to request theinitiation of measurements on common resources in a NodeB. The NodeB then initiates therequested measurements according to the parameters given in the COMMONMEASUREMENT INITIATION REQUEST message sent from the CRNC.




1.5.1 Resource Status Indication ProcedureThe NodeB performs the resource status indication procedure to report its physical resources tothe Control RNC (CRNC).

Triggering Conditions

The NodeB triggers the procedure in one of the following conditions:l A local cell is added to the NodeB.

l A local cell is deleted from the NodeB.

l The capabilities of a local cell change at the NodeB.

l A cell changes its capability and/or its resource operational state at the NodeB.

l Common physical channels and/or common transport channels change their capabilities atthe NodeB.

l A Communication Control Port (CCP) changes its resource operational state at the NodeB.

l A local cell group changes its resource capability at the NodeB.

Procedure

Figure 1-4 shows the resource status indication procedure.

Figure 1-4 Resource status indication procedure

The NodeB sends a RESOURCE STATUS INDICATION message to the CRNC through theNodeB Control Port (NCP). This message may contain the triggering condition and theassociated logical resource information.

1.5.2 Resource Audit ProcedureThe CRNC performs the resource audit procedure to audit the configuration and status of thelogical resources in the NodeB. The audit may let the CRNC know the logical resources of theNodeB and re-synchronize its resources with those of the NodeB.



Triggering ConditionsThe CRNC receives a resource status indication message from the NodeB.

ProcedureFigure 1-5 shows the resource audit procedure.

Figure 1-5 Resource audit procedure

The procedure shown in Figure 1-5 is described as follows:

1. The CRNC sends an AUDIT REQUEST message to the NodeB through the NCP to initiatethe resource audit procedure.

2. The NodeB sends a response message to the CRNC through the NCP.l If the audit succeeds, the NodeB sends an AUDIT RESPONSE message.

The AUDIT RESPONSE message contains information about common physicalchannels of the logical cell, CCP, local cell, and local cell group. The information aboutlocal cell and local cell group is the abstraction of the physical resources of the NodeB.In this way, the CRNC can allocate the logical resources of the cell according to theabstract data.

l If the audit fails, the NodeB sends an AUDIT FAILURE message.

NOTE

A complete audit of a NodeB is performed by one or more audit procedures and each procedure carries anaudit sequence number.

1.5.3 Cell Setup ProcedureThe cell setup procedure is performed to set up a cell in the NodeB.

Triggering ConditionsAfter receiving the AUDIT RESPONSE message from the NodeB, the CRNC decides that theconditions of cell setup are fulfilled and sends a CELL SETUP REQUEST message to theNodeB.




Whether the conditions of cell setup are fullfilled depends on the following local cell informationreported by the NodeB:l Downlink power range

l Minimum spreading factor

l HSDPA cell capability of the NodeB

l High Speed Downlink Shared Channel (HS-DSCH) resource information, which is usedto set up an HSDPA cell

l Common transport channel and physical channel information

l CCP and NCP information

ProcedureFigure 1-6 shows the cell setup procedure.

Figure 1-6 Cell setup procedure


1. The CRNC sends a CELL SETUP REQUEST message to the NodeB through the NCP.The NodeB then sets up a new cell according to the parameters given in the message.

2. The NodeB sends a response message to the CRNC through the NCP.l If the cell is set up, the NodeB sends a CELL SETUP RESPONSE message.

l If the cell fails to be set up, the NodeB sends a CELL SETUP FAILURE message.

1.5.4 Common Transport Channel Setup ProcedureThe common transport channel setup procedure is performed to establish the necessary resourcesin the NodeB, regarding the following channels: S-CCPCH, PICH, PRACH, AICH, FACH,PCH, and RACH.

Triggering ConditionsThe NodeB sends a CELL SETUP RESPONSE message to the CRNC.



Procedure

Figure 1-7 shows the common transport channel setup procedure.

Figure 1-7 Common transport channel setup procedure


1. The CRNC sends a COMMON TRANSPORT CHANNEL SETUP REQUEST messageto the NodeB through the NCP.

One message can be used to configure only one of the following combinations:

l One S-CCPCH and the related FACHs, PCH and PICH

l One PRACH and the related RACH and AICH

2. The NodeB sends a response message to the CRNC through the NCP.

l If the common transport channels are set up, the NodeB sends a COMMONTRANSPORT CHANNEL SETUP RESPONSE message.

l If the common transport channels fail to be set up, the NodeB sends a COMMONTRANSPORT CHANNEL SETUP FAILURE message. At the same time, the celldeletion procedure is triggered.

1.5.5 Iub User Plane Setup ProcedureThe Iub user plane setup procedure is performed to set up bearers for data transmission on theIub interface.

Triggering Conditions

The Iub user plane setup procedure can be triggered in either of the following conditions:

l The common transport channels are set up.

l The dedicated transport channels are set up.

Procedure

Figure 1-8 shows the Iub user plane setup procedure.




Figure 1-8 Iub user plane setup procedure


1. The CRNC sends an Access Link Control Application Part (ALCAP) message Q.AAL2ESTABLISH REQUEST to the NodeB, requesting for Iub user plane setup.

2. The NodeB sends a response message to the CRNC.l If the Iub user plane is set up, the NodeB sends an ALCAP message Q.AAL2

ESTABLISH CONFIRM.l If the Iub user plane fails to be set up, the NodeB sends an ALCAP message Q.AAL2

ESTABLISH RELEASE CONFIRM.

1.5.6 System Information Update ProcedureThe system information update procedure is performed for the NodeB to schedule and updatethe system information segments, which are broadcast on the Broadcast Channel (BCH),according to the parameters in the SYSTEM INFORMATION UPDATE REQUEST message.

Triggering ConditionsThe system information update procedure can be triggered in one of the following conditions:l Physical shared channels are reconfigured.

l Cells are reconfigured.

l All common transport channels are set up.

ProcedureFigure 1-9 shows the system information update procedure.



Figure 1-9 System information update procedure


1. The CRNC sends a SYSTEM INFORMATION UPDATE REQUEST message to theNodeB through the NCP.The message includes the system information that is broadcast in segments on the BCHand the scheduling information of each segment.

2. The NodeB schedules and updates the system information segments on the BCH accordingto the parameters in the message.

3. The NodeB sends a response message to the CRNC through the NCP.l If the system information is updated, the NodeB sends a SYSTEM INFORMATION

UPDATE RESPONSE message.l If the system information fails to be updated, the NodeB sends a SYSTEM

INFORMATION UPDATE FAILURE message. At the same time, the cell deletionprocedure is triggered.

1.5.7 Physical Shared Channel Reconfiguration ProcedureThe physical shared channel reconfiguration procedure is performed for the NodeB toreconfigure the physical channels according to the PHYSICAL SHARED CHANNELRECONFIGURATION REQUEST message sent from the CRNC.

Triggering ConditionsThe system information is updated and the cell to be set up is an HSDPA cell.

ProcedureFigure 1-10 shows the physical shared channel reconfiguration procedure.




Figure 1-10 Physical shared channel reconfiguration procedure


1. The CRNC sends a PHYSICAL SHARED CHANNEL RECONFIGURATIONREQUEST message to the NodeB through the NCP to initiate the reconfiguration of theresources on the HS-DSCH and Enhanced UL DCH (E-DCH).

2. The NodeB sends a response message to the CRNC through the NCP.l If the physical shared channels are reconfigured, the NodeB sends a PHYSICAL

SHARED CHANNEL RECONFIGURATION RESPONSE message.l If the physical shared channels fail to be reconfigured, the NodeB sends a PHYSICAL

SHARED CHANNEL RECONFIGURATION FAILURE message.

1.5.8 Common Measurement Initiation ProcedureThe common measurement initiation procedure is performed for the CRNC to request theinitiation of measurements on common resources in a NodeB. The NodeB then initiates therequested measurements according to the parameters given in the COMMONMEASUREMENT INITIATION REQUEST message sent from the CRNC.

Triggering ConditionsThe cell is set up and activated.

ProcedureFigure 1-11 shows the common measurement initiation procedure.

Figure 1-11 Common measurement initiation procedure




1. The CRNC sends a COMMON MEASUREMENT INITIATION REQUEST message tothe NodeB by using the NCP to initiate the common measurement initiation procedure. Themessage includes the measurement object type (such as cell and RACH), commonmeasurement type (such as transmit carrier power and received total wide band power),and report characteristics (such as On-Demand report, periodic report, and event report).

2. The NodeB initiates the requested measurement according to the parameters given in themessage.

3. The NodeB sends a response message to the CRNC through the NCP.l If the measurement requested by the CRNC is initiated, the NodeB sends a COMMON

MEASUREMENT INITIATION RESPONSE message.l If the measurement requested by the CRNC fails to be initiated, the NodeB sends a

COMMON MEASUREMENT INITIATION FAILURE message.




01-01 cell setup procedure

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