UE Behaviors in Idle

UE Behaviors in Idle RAN12.0

Feature Parameter Description

Issue 01

Date 2010-03-30

HUAWEI TECHNOLOGIES CO., LTD.

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WCDMA RAN

UE Behaviors in Idle Contents

Issue 01 (2010-03-30) Huawei Proprietary and Confidential

Copyright © Huawei Technologies Co., Ltd

iii

Contents

1 Introduction ................................................................................................................................ 1-1

1.1 Scope ............................................................................................................................................ 1-1

1.2 Intended Audience ........................................................................................................................ 1-1

1.3 Change History .............................................................................................................................. 1-1

2 Overview ..................................................................................................................................... 2-1

3 PLMN Selection ......................................................................................................................... 3-1

4 Cell Selection and Reselection ............................................................................................. 4-1

4.1 Cell Selection ................................................................................................................................ 4-1

4.1.1 Cell Selection Procedure ...................................................................................................... 4-1

4.1.2 Cell Selection Criteria (Criteria S) ........................................................................................ 4-3

4.2 Cell Reselection ............................................................................................................................ 4-4

4.2.1 Cell Reselection Process...................................................................................................... 4-4

4.2.2 Measurement Start Criteria .................................................................................................. 4-5

4.2.3 Cell Reselection Criteria ....................................................................................................... 4-9

5 Location Registration .............................................................................................................. 5-1

5.1 Classification of Location Registration .......................................................................................... 5-1

5.2 Normal Location Registration ........................................................................................................ 5-1

5.3 Periodic Location Registration ...................................................................................................... 5-1

5.4 IMSI Attach/Detach ........................................................................................................................ 5-1

6 Paging Reception ..................................................................................................................... 6-1

6.1 Paging Types ................................................................................................................................. 6-1

6.2 Reception Process ........................................................................................................................ 6-1

6.3 Reception Technology ................................................................................................................... 6-1

7 Broadcast Information Reception ........................................................................................ 7-1

7.1 System Information Reception ...................................................................................................... 7-1

7.2 Cell Broadcast Service Reception ................................................................................................. 7-2

7.3 MBMS Reception .......................................................................................................................... 7-2

8 Parameters ................................................................................................................................. 8-1

9 Counters ...................................................................................................................................... 9-1

10 Glossary .................................................................................................................................. 10-1

11 Reference Documents ......................................................................................................... 11-1

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UE Behaviors in Idle 1 Introduction



1-1

1 Introduction

1.1 Scope

This document describes the working principles of the UE Behaviors in Idle feature.

1.2 Intended Audience

This document is intended for:

Personnel who are familiar with WCDMA basics

Personnel who need to understand UE Behaviors in Idle feature

Personnel who work with Huawei products

1.3 Change History

This section provides information on the changes in different document versions.

There are two types of changes, which are defined as follows:

Feature change: refers to the change in the UE Behaviors in Idle feature.

Editorial change: refers to the change in wording or the addition of the information that was not described in the earlier version.

Document Issues

The document issues are as follows:

01 (2010-03-30)

Draft (2009-12-05)

01 (2010-03-30)

This is the document for the first commercial release of RAN12.0.

Compared with issue Draft (2009-12-05) of RAN12.0, this issue optimizes the description.

Draft (2009-12-05)

This is the draft of the document for RAN12.0.

Compared with issue 02 (2009-06-30) of RAN11.0, this issue optimizes the description.

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UE Behaviors in Idle 2 Overview



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2 Overview

The UE enters the idle mode immediately after being switched on. The feature UE Behaviors in Idle feature ensures that the UE is ready to start a service (for example, to make a call or pick a call).

The behaviors are as follows:

PLMN selection

This procedure ensures that the PLMN selected by the UE provides services properly.

Cell selection and reselection

This procedure ensures that the UE finds a suitable cell to camp on.

Location registration

This procedure is used by the UE to report its status to the network. This procedure is of two types: periodical location registration and the location registration necessitated by changes in the location area.

In addition, the UE in idle mode takes the following actions:

Paging reception

The network sends paging messages to the UE in CELL_PCH or URA_PCH state.

The UE detects the paging indicator on the PICH within the predefined time and receives corresponding paging messages on the S_CCPCH. If the cell and the UE in CELL_FACH support the HS-DSCH function, UE in CELL_PCH or URA_PCH state receives paging messages on the HS-PDSCH.

Broadcast information reception

The network broadcasts the network information to the UE that camps on the cell. Upon reception of broadcast information, the UE obtains the network information and takes actions accordingly.

This feature enables the UE to:

Receive system information from the PLMN

Prepare to establish the RRC connection

Prepare to respond to paging messages

Receive cell broadcast services

Report the UE state to the network periodically or in event-triggered mode

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UE Behaviors in Idle 3 PLMN Selection



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3 PLMN Selection

When the UE is switched on, or the coverage is restored, or the UE selects a cell that belongs to another PLMN, the UE selects the registered PLMN or its equivalent PLMN. If no registered PLMN or equivalent PLMN is available, or if registration fails, the UE performs one of the following two procedures, depending on its operating mode:

Automatic selection

The UE automatically selects a PLMN according to the priority order.

Manual selection

The UE shows all available PLMNs to the subscriber. The subscriber then selects a PLMN.

For more details of the PLMN selection, refer to 3GPP TS 25.304 and 3GPP TS 23.122.

PLMN Selection Procedure

The PLMN reselection procedure for the two mode is the same. The procedure is as follows:

Step 1 Either the HPLMN (if the EHPLMN list is not present or is empty) or the highest priority EHPLMN that is available (if the EHPLMN list is present) ;

Step 2 Each PLMN/access technology combination in the "User Controlled PLMN Selector with Access Technology" data file in the SIM (in priority order);

Step 3 Each PLMN/access technology combination in the "Operator Controlled PLMN Selector with Access Technology" data file in the SIM (in priority order);

Step 4 Other PLMN/access technology combinations with received high quality signal in random order;

Step 5 Other PLMN/access technology combinations in order of decreasing signal quality.

Step 6 The previously selected PLMN/access technology combination.

----End

The HPLMN are the PLMNs of which the MCC and MNC are the same as that in the IMSI of the UE. The HPLMNs are the network that the UE subscribed.

The VPLMNs are the PLMNs that the UE camps on except the HPLMNs.

Roaming in the VPLMN

If a UE stays in a VPLMN, it periodically searches for the HPLMN and higher-priority PLMNs for better services.

For this purpose, a value of T minutes may be stored in the SIM. Either T is in the range 6 minutes to 8 hours with a step of 6 minutes or T indicates that no periodic attempts shall be made. If no value is stored in the SIM, a default value of 60 minutes is used.

When the UE attempts to access the HPLMN or the PLMN with higher priority, the UE must adhere to the following rules:

After the UE is switched on, a period of at least two minutes and at most T minutes shall elapse before the first attempt is made.

Periodic attempts shall be performed only by the UE in idle mode.

Only the priority levels of equivalent PLMNs of the same country (which serve as the current serving VPLMN) can be compared with the priority level of a selected PLMN.

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UE Behaviors in Idle 4 Cell Selection and Reselection



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4 Cell Selection and Reselection

After the PLMN is selected, the UE starts to select a suitable cell that belongs to the selected PLMN to camp on and to resume normal services. For details, see 3GPP 25.304.

4.1 Cell Selection

4.1.1 Cell Selection Procedure

Figure 4-1 shows the cell selection procedure for the UE in idle mode.

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Figure 4-1 Cell selection procedure for the UE in idle mode

To select a new PLMN, go back to position 1 in the procedure, as shown in Figure 4-1.

Table 4-1 describes the UE state involved in the cell selection.

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Table 4-1 UE state involved in the cell selection

SN State Description

1 Camped normally

The UE camped on a suitable cell.

A "suitable cell" is a cell on which the UE may camp on to obtain normal service.

2 Connected mode

After RRC connection setup, the UE changes from the idle mode to the connected mode (CELL_DCH, CELL_FACH, CELL_PCH, or URA_PCH state)

3 Any cell selection

The UE attempts to find an acceptable cell of any PLMN to camp on.

An "acceptable cell" is a cell on which the UE may camp to obtain limited service (originate emergency calls).

4 Camped on any cell

The UE obtains limited services and selects a cell through cell selection or reselection. In this case, the PLMN identity is not considered.

Figure 4-1 also shows the following items:

Initial cell selection

If no cell information is stored for the PLMN, the UE starts the initial cell selection. For this procedure, the UE need not know in advance which Radio Frequency (RF) channels are UTRA carriers. The UE scans all RF channels in the UTRA band according to its capabilities to find a suitable cell of the selected PLMN.

On each carrier, The UE has to search for the strongest cell. Once a suitable cell is found, this cell shall be selected.

Stored information of cell selection

For this procedure, The UE has to know the central frequency information and other optional cell parameters that are obtained from the measurement control information received before, such as scrambling codes.

After this procedure is started, the UE selects a suitable cell if any. Otherwise, the initial cell selection procedure is triggered.

Cell selection of the UE leaving the connected mode

When returning to the idle mode from the connected mode, the UE shall select a suitable cell to camp on. Candidate cells for this selection are the cells used immediately before the UE leaves the connected mode.

When returning to the idle mode after an emergency call on any PLMN, the UE shall select an acceptable cell to camp on. Candidate cells for this selection are the cells used immediately before the UE leaves the connected mode.

If no acceptable cell is found, the UE shall continue to search for an acceptable cell on any PLMN in the state "Any cell selection".

4.1.2 Cell Selection Criteria (Criteria S)

The cell selection criterion S is fulfilled when:

Srxlev > 0 and Squal > 0,

Where:

Squal = Qqualmeas – Qqualmin

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4-4

Srxlev = Qrxlevmeas - Qrxlevmin - Pcompensation

Parameter Description

Squal Cell selection quality value (dB)

Applicable only to FDD cells

Srxlev Cell selection RX level value (dB)

Qqualmeas Measured cell quality value

Quality of the received signal indicated in average CPICH Ec/No (dB) for FDD cells

Applicable only to FDD cells

Qrxlevmeas Measured cell RX level value

CPICH RSCP of received signal for FDD cells (dBm).

P-CCPCH RSCP of received signal for TDD cells (dBm)

Qqualmin Qqualmin, required minimum quality level

Qrxlevmin Qrxlevmin, required minimum RX level

Pcompensation Max (MaxAllowedUlTxPower–MaxUEPower, 0) (dB)

where

MaxAllowedUlTxPower, maximum allowed UE UL TX power.

MaxUEPower: maximum RF output power of the UE (dBm)

MaxAllowedUlTxPower is set by the network according to the designed cell coverage. When the maximum UE power is lower than the value, the effective cell coverage for this UE is actually reduced by Pcompensation.

The parameters Qqualmin and Qrxlevmin can be set through the MML command ADD UCELLSELRESEL or ADD UINTERFREQNCELL.

If the parameter InterNCellQualReqFlag is set to Ture, the values of Qqualmin and Qrxlevmin which are set through ADD UINTERFREQNCELL will be used and broadcast through SIB11.

Otherwise, the values of Qqualmin and Qrxlevmin which are set through ADD UCELLSELRESEL will be used and broadcast through SIB3.

4.2 Cell Reselection

The signal strength of both serving cell and neighboring cells varies with the movement of a UE and so the UE needs to reselect the most suitable cell to camp on. This process is called cell reselection. Cell reselection involves three parts: cell reselection process, measurement start criteria, and cell reselection criteria.

4.2.1 Cell Reselection Process

The cell reselection process is as follows:

Step 1 The UE calculates the serving cell SX according to the following formulas:

Squal = Qqualmeas - Qqualmin

Srxlev = Qrxlevmeas - Qrxlevmin - Pcompensation

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For detailed description of the formulas, see 4 Cell Selection.

Figure 4-1 shows the cell reselection of the UEs in idle mode.

Step 2 The UE decides whether to start the intra-frequency or inter-frequency measurement according to the Sx and the UE movement state.

To start the intra-frequency, inter-frequency, or inter-RAT measurement, go to Step 3. For details, see 4.2.2 Measurement Start Criteria.

Otherwise, end the cell reselection.

Step 3 The cells are queued according to the measurement results. The UE selects a suitable cell to camp on according to the cell reselection criteria. For details, see 4.2.3 Cell Reselection Criteria.

----End

4.2.2 Measurement Start Criteria

The Hierarchical Cell Structure (HCS) may affect the measurement start criteria for cell reselection.

Measurement Start Criteria with HCS Disabled

Figure 4-2 shows the intra-frequency, inter-frequency and inter-RAT measurement criteria in the case when the system information broadcast in the serving cell indicates that the HCS is disabled.

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Figure 4-2 Measurement start criteria for cell reselection with HCS disabled

Intra-frequency measurement

− If Squal > Sintrasearch, the UE need not start the intra-frequency measurement.

− If Squal ≤ Sintrasearch, the UE need to start the intra-frequency measurement.

− If system messages do not contain Sintrasearch, the UE always need to start the intra-frequency measurement.

Sintrasearch is set through IdleSintrasearch or ConnSintrasearch on the RNC side.

Inter-frequency measurement

− If Squal > Sintersearch, the UE need not start the inter-frequency measurement.

− If Squal ≤ Sintersearch, the UE need to start the inter-frequency measurement.

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− If system messages do not contain Sintersearch, the UE always need to start the inter-frequency measurement.

Sintersearch is set through IdleSintersearch or ConnSintersearch on the RNC side.

Inter-RAT measurement

− If Squal > SsearchRATm, the UE need not start the inter-RAT measurement.

− If Squal ≤ SsearchRATm, the UE need to start the inter-RAT measurement.

− If system messages do not contain SsearchRATm, the UE always need to start the inter-RAT measurement.

SsearchRATm is set through SsearchRat on the RNC side.

Measurement Start Criteria for Slow UE in HCS

Intra-frequency and inter-frequency measurement criteria for the UE in slow movement

Table 4-2 Intra-frequency and inter-frequency measurement criteria for the UE in slow movement

Condition Result

Srxlev ≤ SsearchHCS

or Squal ≤ Sintersearch

or SsearchHCS not delivered

or Sintersearch not delivered

All intra-frequency and inter-frequency cells are measured.

SsearchHCS is set through SsearchHCS on the RNC side.

Squal ≤ Sintrasearch Intra-frequency and inter-frequency cells with their HCS level no lower than that of the current cell are measured

Squal > Sintrasearch Intra-frequency and inter-frequency cells with their HCS level higher than that of the current cell are measured.

Sintrasearch not delivered All intra-frequency cells are measured.

Inter-frequency cells with their HCS level higher than that of the current cell are measured.

Inter-RAT measurement criteria for UE in slow movement

Table 4-3 Inter-RAT measurement criteria for UE in slow movement

Condition Result

Srxlev ≤ SHCS,RATm or Squal ≤ SSearchRATm

Inter-RAT cells are measured.

SHCS,RATm is set through SHCSRat on the RNC side.

Squal ≤ Slimit,SearchRATm Inter-RAT cells are measured when the HCS level of inter-RAT cells is higher than or equal to that of the current cell.

Slimit,SearchRATm is set through SlimitSearchRat on the RNC side.

Squal > Slimit,SearchRATm The UE need not measure inter-RAT cells.

SHCS,RATm not delivered Inter-RAT cells are measured.

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Measurement Start Criteria for Fast UE in HCS

Intra-frequency and inter-frequency measurement criteria for the UE in fast movement

Table 4-4 Intra-frequency and inter-frequency measurement criteria for the UE in fast movement

Condition Result

Srxlev ≤ SsearchHCS

or Squal ≤ Sintersearch

or SsearchHCS not delivered

or Sintersearch not delivered

All intra-frequency and inter-frequency cells are measured.

Others (such as Srxlev and Squal are good). All intra-frequency and inter-frequency cells with their HCS level no higher than that of the current cell are measured

Inter-RAT measurement criteria for the UE in fast movement

Table 4-5 Inter-RAT measurement criteria for the UE in fast movement

Condition Result

Srxlev ≤ SHCS,RATm or Squal ≤ SSearchRATm Inter-RAT cells are measured.

SHCS,RATm or SSearchRATm not delivered Inter-RAT cells are measured.

Others such as Srxlev and Squal are good. All inter-RAT cells are measured when the HCS level of inter-RAT cells is lower than or equal to that of the current cell.

UE Speed Estimation

The criteria with HCS enabled needs to consider the UE speed. The UE speed estimation is performed by RNC.

When HCS is enabled, the RNC determines the UE movement state according the following condition:

When the UE is in the slow movement state

If the number of cell reselection within a period TCRmax is more than CRMaxNum, or the RNC notify the UE that the UE is in fast movement, the UE is in the fast movement state.

When the UE is in the fast movement

If the number of cell reselection within a period TCRmax is less than CRMaxNum, the UE keeps in the fast movement state for a hysteresis period (TCrmaxHyst).

During the hysteresis period, even if the conditions for fast movement are not met, the UE still stay in the fast movement state until the hysteresis period expires.

Measurement Occasion

When a UE is in the Idle, CELL_PCH or URA_PCH state, the UE can perform intra-freq, inter-freq or inter-RAT measurement during paging occasion.

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When a UE is in the CELL_FACH state, the UE can perform intra-freq at any occasion and can perform inter-freq or inter-RAT measurement during FACH measurement occasion.

When a UE is in the CELL_DCH state, the UE can perform intra-freq at any occasion and can perform intre-freq or inter-RAT measurement during the gap of the compressed mode.

4.2.3 Cell Reselection Criteria

Definition of H criterion and R criterion

H criterion and R criterion are used for cell reselection.

The quality level threshold criterion H for the HCS is used to determine whether the prioritized ranking based on the hierarchical cell reselection rules shall apply. If the system information indicates that the HCS is not used, the quality level threshold criterion H does not apply.

Criterion Definition

Criterion H Hs= Qmeas, s - Qhcss

Hn= Qmeas, n - Qhcsn – TQn * Ln

Hs is for serving cell.

Hn is for neighbouring cell.

Qmeas, s is the measurement result of the serving cell.

Qhcss is set through the parameter Qhcs for the serving cell

Qmeas, n is the measurement result of the neighbouring cell.

Qhcsn is set through the parameter Qhcs for the neighbouring cell.

Criterion R Rs=Qmeas, s + Qhysts

Rn=Qmeas, n –Qoffsets, n - TQn * (1-Ln)

Rs is for serving cell.

Rn is for neighbouring cell.

Qmeas, s is the measurement result of the serving cell.

Qhysts is set through the parameter IdleQhyst1s (RSCP) or IdleQhyst2s (Ec/No ) for the serving cell.

Qmeas, n is the measurement result of the neighbouring cell.

Qoffsets, n is set through the parameter IdleQoffset1sn (RSCP) or IdleQoffset2sn (Ec/No).

TEMP_OFFSETn (TempOffset1 for RSCP and TempOffset2 for Ec/No) is used as an offset to the H and R criterions for the duration of PENALTY_TIMEn (TpenaltyHcsReselect) after a timer Tn (count from zero) is started for that neighboring cell.

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TEMP_OFFSETn and PENALTY_TIMEn are only applicable when the system information indicates that the HCS is enabled. So TQn is only applicable if the usage of HCS is indicated in system information.

Cell Reselection Procedure

Figure 4-3 shows the cell reselection procedure. The procedure describes the measurement start and criteria relations. The actual procedure varies with UE implementation.

Figure 4-3 Cell reselection procedure

Firstly, the UE shall select a cell set in the following procedure:

If HCS is not used (UseOfHcs is set to NOT_USED), the UE selects the cells that fullfills the Criteria S.

If HCS is used (UseOfHcs is set to USED) and the UE moves slowly,

− If there are cells that fullfill the Criteria H (H>=0), the UE selects the cells with the highest HCSPrio in those cells that fulfill the criterion H ≥ 0 and Criteria S.

− Else if there is no cell that fullfills the Criteria H (H>=0), the UE selects the cells that fullfills the Criteria S.

If HCS is used (UseOfHcs is set to USED) and the UE moves fast,

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− If there is no cell that fullfill the Criteria H (H>=0), the UE selects the cells that fullfills the Criteria S.

− If there are cells that fullfill the Criteria H (H>=0),

If there are cells with HCS prioritys lower than the HCS priority of the serving cell, the UE selects the cells that have the highest HCSPrio (lower than that of the serving cell), fulfill the criterion H ≥ 0 and Criteria S.

If there is no cell with HCS prioritys lower than the HCS priority of the serving cell, the UE selects the cells that have the lowest HCSPrio (higher than that of the serving cell), fulfill the criterion H ≥ 0 and Criteria S.

Secondly, the UE shall rank the cells according to the R criterion as described in the following cases.

The cells shall be ranked according to the R criteria specified above, deriving Qmeas,n and Qmeas,s and calculating the R values using CPICH RSCP, P-CCPCH RSCP and the averaged received signal level for FDD, TDD and GSM cells, respectively. The best ranked cell is the cell with the highest R value.

If a TDD or GSM cell is ranked as the best cell, the UE shall reselect that TDD or GSM cell.

If an FDD cell is ranked as the best cell and the quality measure for cell selection and reselection is set to CPICH RSCP (QualMeas = CPICH_RSCP), the UE shall reselect that FDD cell.

If an FDD cell is ranked as the best cell and the quality measure for cell selection and reselection is set to CPICH Ec/No(QualMeas = CPICH_ECNO), the UE shall perform a second ranking of the FDD cells according to the R criterion specified above.

− In this case, however, the UE uses the measurement quantity CPICH Ec/No for deriving the Qmeas,n and Qmeas,s, and then calculating the R values of the FDD cells. The offset IdleQoffset2sn is used for Qoffsets,n to calculate Rn, and the hysteresis IdleQhyst2s is used for Qhysts to calculate Rs.

− If the system information indicates that the HCS is enabled, TempOffset2 is used to calculate TQn. Otherwise, TEMP_OFFSETn is not used to calculate Rn. Following the second ranking, the UE shall reselect the best ranked FDD cell.

In all the previous cases, the UE can reselect a new cell only when the following conditions are met:

The R value of the new cell is larger than the R value of the serving cell during a time interval Treselections.

More than one second has elapsed since the UE camped on the current serving cell..

For details of the cell reselection criteria, refer to 3GPP TS 25.304.

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UE Behaviors in Idle 5 Location Registration



5-1

5 Location Registration

Location registration is used for the PLMN to trace the current status of the UE. Location registration ensures that the UE is connected to the network when the UE does not perform any operation for a long period.

5.1 Classification of Location Registration

Location registration refers to the location update for non-GPRS and the route update for GPRS. Location registration is of the following three types:

Normal location registration

Periodic location registration

IMSI attach/detach

5.2 Normal Location Registration

The UE performs normal location registration in the following conditions:

After being switched on, the UE selects a suitable cell that belongs to a new LA or RA. That is, the LA or RA is different from that recorded in the USIM before the switch-off of the UE.

The UE in idle mode enters the cell of a new LA or RA.

5.3 Periodic Location Registration

Periodic location registration may be used to periodically notify the network of the availability of the UE. It is controlled by a Periodic Location Update timer (T3212, for non-GPRS operation) or a Periodic Routing Area Update timer (T3312, for GPRS operation).

The value of T3212 is sent by the network to the UE in SIB 1. The value of T3312 is sent by the network to the UE in the messages ATTACH ACCEPT and ROUTING AREA UPDATE ACCEPT. The value of T3312 shall be unique within an RA.

T3212 is set through T3212 on the RNC side. T3312 is set on the CN side.

The description of the timer T3212 is as follows:

When the UE is switched on or the system information indicates that periodic location registration shall be applied, and the timer T3212 is not running. Then, the timer shall be loaded with a random value between 0 and the value of T3212, and shall be started.

When the timer T3212 reaches its expiry value, the UE shall initiate the periodic location registration.

The timer T3212 shall be prevented from triggering periodic location update in connected mode. When the UE returns to the idle mode, T3212 shall be initialized with respect to the broadcast timeout value and then be started.

If the UE performs a successful combined routing area update, the timer T3212 shall be prevented from triggering the periodic location update until the UE starts location update, for example, because a network operation mode changes or the UE uses non-GPRS services only.

5.4 IMSI Attach/Detach

The IMSI attach/detach process facilitates the fast location registration of the UE in specific conditions.

When the IMSI attach/detach operation applies, the UE shall send the IMSI detach message to the network when the UE is switched off or the SIM is removed while being in the UPDATED state. This IMSI detach message will not be acknowledged by the network.

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UE Behaviors in Idle 5 Location Registration



5-2

The system information contains an indicator indicating whether the IMSI attach/detach operation is mandatory in the cell. The UE shall operate in accordance with the received value of the indicator. This indicator, however, shall not be considered in GRPS attach/detach.

If the UE still stays in the same LA or RA after being switched on again, the UE shall perform an LR request indicating IMSI attach. Otherwise, the UE shall perform an LR request indicating normal location update.

You can set the IMSI attach/detach indicator by setting ATT.

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UE Behaviors in Idle 6 Paging Reception



6-1

6 Paging Reception

By receiving paging messages, the UE is notified of the service requests made by the CN and the changes in system information.

This section involves the following feature

WRFD-010301 Paging UE in Idle, CELL_PCH, URA_PCH State (Type 1)

WRFD-010302 Paging UE in CELL_FACH, CELL_DCH State (Type 2)

6.1 Paging Types

There are two types of paging:

Paging UE in Idle, CELL_PCH, URA_PCH State (Type 1)

When an UE is in idle, CELL_PCH, or URA_PCH state, UTRAN sends a paging message to the UE through the PCCH.

Paging type 1 procedure is used to transmit paging information to the selected UEs in idle mode, CELL_PCH or URA_PCH state using the PCCH. With this feature, upper layers in the network can:

Trigger UE establishing a RRC signaling connection.

Trigger CELL UPDATE procedure of UE in CELL_PCH or URA_PCH state.

Trigger reading of updated system broadcast of UE in idle mode, CELL_PCH or URA_PCH state.

Trigger releasing signaling connection of UE in CELL_PCH or URA_PCH state.

Paging UE in CELL_FACH, CELL_DCH State (Type 2)

The network can control the UE in CELL_FACH or CELL_DCH state which has DCCH with paging type 2 procedures.

In paging type 2, UTRAN sends a paging message to the UE in CELL_FACH or CELL_DCH state through the DCCH or FACH.

6.2 Reception Process

When a UE stays in idle mode, the paging to the UE is performed within an LA or RA or the whole RNC. The UE receives the paging information from the PICH, and reads the information on the S-CCPCH.

6.3 Reception Technology

To reduce power consumption, the UE can read the information from the PICH only at a particular time. This is known as the Discontinuous Reception (DRX) technology. The interval between two consecutive receiving occasion is called DRX cycle.

For Frequency Division Duplex (FDD), the DRX cycle length shall be 2k frames, where k is an integer

and is determined by the following three parameters:

CN domain specific DRX cycle length for CS

CN domain specific DRX cycle length for PS

UTRAN DRX cycle length coefficient

The description of the parameters is as follows:

CN domain specific DRX cycle lengths

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UE Behaviors in Idle 6 Paging Reception



6-2

The UE may be attached to different CN domains with different CN domain specific DRX cycle lengths. The UE shall store these lengths for all CN domains where the UE is attached and shall use the shortest one.

UTRAN DRX cycle length

This parameter value is sent to the UE through the RRC CONNECTION SETUP message without distinguishing specific CN domain types.

The UTRAN DRX cycle length is set through DRXCYCLELENCOEF on the RNC side.

For a UE in idle mode, the DRX cycle length equals the shortest value of the stored DRX cycle length for the CN domains where the UE is attached, with no signaling connection established.

For a UE in CELL_PCH state or URA_PCH state, the DRX cycle length equals the shortest value of the following lengths:

− UTRAN DRX cycle length

− Any of the stored DRX cycle length for the CN domains where the UE is attached, with no signaling connection established

If you set a great DRX cycle length coefficient, the period for UE detect paging information will be long; therefore, the UE can reduce the power consumption, but the delay for responding to a paging will be long.

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UE Behaviors in Idle 7 Broadcast Information Reception



7-1

7 Broadcast Information Reception

Upon receipt of broadcast information, the UE obtains the network information and takes actions accordingly.

7.1 System Information Reception

Structure of System Information

The structure of system information is like a tree, which includes the following items:

MIB

Master Information Block (MIB) provides reference and scheduling information for a number of SIBs in a cell or one or two Scheduling Blocks (SBs) in a cell. The MIB contains only the PLMN types supported and the corresponding PLMN identities.

SB

Scheduling Block (SB) provides reference and scheduling information for other SIBs. The scheduling information of an SIB may be included in the MIB or SB.

SIB

System Information Block (SIB) contains actual system information. It consists of system information elements (IEs) with the same purpose.

When selecting a new cell, the UE reads the MIB. The UE may locate the MIB through the predefined scheduling information.

The UE may use the scheduling information in the MIB and SB to locate each SIB to be acquired. If the UE receives an SIB in a position according to the scheduling information and considers the content as valid, the UE will read and store the SIB.

System Information Reception

The UE shall read system information broadcast on a BCH transport channel when the UE is in idle mode or connected mode (CELL_FACH, CELL_PCH, or URA_PCH state). Then, the UE takes actions on the following occasions:

When the UE is switched off

Except the SIBs stored in the USIM and used for the stored information cell selection, the UE shall consider other stored SIBs as invalid.

When the UE is switched on

The UE shall store SIBs with an area scope (cell, PLMN, or equivalent PLMN) and their value tag. These SIBs are used when the UE returns to the cells.

When the UE selects a new cell in a new PLMN

The UE shall consider all current SIBs with an area scope (cell or PLMN) as invalid, and shall store and use a new SIB. If the identity of this PLMN does not match the identity of the previously selected PLMN, the UE shall consider all SIBs with an area scope (equivalent PLMN) as invalid.

When the UE selects a new cell in the current PLMN

The UE shall consider all current SIBs with an area scope (cell) as invalid, and shall store and use a new SIB.

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UE Behaviors in Idle 7 Broadcast Information Reception



7-2

7.2 Cell Broadcast Service Reception

A UE supporting Cell Broadcast Service (CBS) can receive Broadcast/Multicast Control (BMC) messages in idle mode. The UE receives BMC messages during time intervals that do not conflict with the UE specific paging occasions.

7.3 MBMS Reception

If all of the following conditions are met:

The UE has activated MBMS services.

The MBMS is available in the cell, that is, the MBMS point-to-multipoint Control Channel (MCCH) information is provided on the Broadcast Control Channel (BCCH).

The UE is permitted to receive MBMS in the cell.

Then, the UE performs the following operations:

Receives the MCCH.

Receives each FACH. The FACH refers to the one on which the MBMS point-to-multipoint Traffic Channel (MTCH) is mapped, and the MTCH refers to the one that carries an activated MBMS service without the need of setting up an RRC connection.

Participates in MBMS counting.

The UE may monitor the MBMS notification Indicator Channel (MICH) and receive the MBMS point-to-multipoint Scheduling Channel (MSCH).

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UE Behaviors in Idle 8 Parameters



8-1

8 Parameters

Table 8-1 Parameter description

Parameter ID NE MML Description

T3212 BSC6900 ADD UCNDOMAIN(Optional) MOD UCNDOMAIN(Optional)

Meaning: Periodical location update is implemented by MS through the location update procedure. 0: The periodical update procedure is not used. This parameter is valid only when [CN domain ID] is set as CS_DOMAIN. GUI Value Range: 0~255 Actual Value Range: 0~1530 step:6 Unit: min Default Value: 10

ATT BSC6900 ADD UCNDOMAIN(Optional) MOD UCNDOMAIN(Optional)

Meaning: Indicating whether attach/detach is allowed. NOT_ALLOWED indicates that MS cannot apply the IMSI attach/detach procedure. ALLOWED indicates that MS can apply the IMSI attach/detach procedure. It is valid only when [CN domain ID] is set as CS_DOMAIN. GUI Value Range: NOT_ALLOWED, ALLOWED Actual Value Range: NOT_ALLOWED, ALLOWED Unit: None Default Value: ALLOWED

Qqualmin BSC6900 ADD UCELLSELRESEL(Optional) MOD UCELLSELRESEL(Optional)

Meaning: The minimum required quality threshold corresponding to CPICH Ec/No. The UE can camp on the cell only when the measured CPICH Ec/No is greater than the value of this parameter. The higher the parameter value is, the more difficult it is for the UE to reside in the cell. The lower parameter value is, the easier it is for the UE to reside in the cell, but it is possible that the UE cannot receive the system messages that are sent through the PCCPCH. For detailed information, refer to the 3GPP TS 25.304. GUI Value Range: -24~0 Actual Value Range: -24~0 Unit: dB Default Value: -18

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8-2

Qqualmin BSC6900 ADD UEXT3GCELL(Mandatory) MOD UEXT3GCELL(Mandatory)

Meaning: This parameter defines the CPICH Ec/No access threshold of the cell. The UE can camp on the cell only when the measured CPICH Ec/No is greater than the value of this parameter. For FDD cells, the cell selection criterion S in the 25.304 protocol is defined as follows: Srxlev>0 AND Squal>0 Where: - Squal = Qqualmeas - Qqualmin - Srxlev = Qrxlevmeas - Qrxlevmin - Pcompensation - Qqualmeas is the measured cell quality value, namely CPICH Ec/No. - Qrxlevmeas is the measured cell RX level value, namely CPICH RSCP. - Qrxlevmin is the minimum required quality level in the cell. - Pcompensation = max(UE_TXPWR_MAX_RACH-P_MAX, 0) - UE_TXPWR_MAX_RACH is the maximum TX power level a UE may use when accessing the cell on RACH, namely MaxAllowedULTxPower. - P_MAX is the maximum RF output power of the UE. As for the impact on network performance: The larger the value of the parameter is, the more difficult it is for the UE to camp on the cell. The smaller the value of the parameter is, the easier it is for the UE to camp on the cell. But if the value is excessively small, it is possible that the UE cannot receive the system messages carried by PCCPCH. When this parameter is not set to any value, the UE adopts the corresponding value of the current serving cell, added through the ADD UCELLSELRESEL command. Generally, this parameter is not set to any value. GUI Value Range: -24~0 Actual Value Range: -24~0 Unit: dB Default Value: None

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8-3

Qqualmin BSC6900 ADD UINTERFREQNCELL(Optional) MOD UINTERFREQNCELL(Mandatory)

Meaning: Minimum CPICH Ec/No for the neighboring cell on cell reselection. The neighboring cell can be involved in cell sorting for reselection only when its CPICH Ec/No is above this threshold. If this parameter is set to the same value as Qqualmin for the serving cell, Qqualmin is not contained in SIB11 or SIB12. In this case, the UE extracts the Qqualmin from SIB3. For details, see the 3GPP TS 25.331. According to the 3GPP TS 25.304, S criterion for cell reselection is defined as follows: Srxlev > 0 and Squal > 0 Here, Squal = Qqualmeas - Qqualmin Srxlev = Qrxlevmeas - Qrxlevmin - Pcompensation "Qqualmeas" refers to the measured CPICH Ec/No. "Qrxlevmeas" refers to the CPICH RSCP. "Qrxlevmin" refers to the minimum CPICH receive power in the current cell. Pcompensation = max(UE_TXPWR_MAX_RACH - P_MAX, 0) "UE_TXPWR_MAX_RACH", also named as "MaxAllowedULTxPower", refers to the maximum uplink transmit power when the UE accesses a cell. "P_MAX" refers to the maximum RF output power of the UE. GUI Value Range: -24~0 Actual Value Range: -24~0 Unit: dB Default Value: -24

MaxAllowedUlTxPower

BSC6900 ADD UCELLSELRESEL(Optional) MOD UCELLSELRESEL(Optional)

Meaning: The maximum allowed uplink transmit power of a UE in the cell, which is related to the network planning. For detailed information, refer to 3GPP TS 25.304. GUI Value Range: -50~33 Actual Value Range: -50~33 Unit: dBm Default Value: 24

MaxAllowedUlTxPower

BSC6900 ADD UEXT3GCELL(Mandatory) MOD UEXT3GCELL(Mandatory)

Meaning: This parameter specifies the maximum allowed uplink TX power of a UE in the cell. When this parameter is not set to any value, the UE adopts the corresponding value of the current serving cell, added through the ADD UCELLSELRESEL command. Generally, this parameter is not set to any value. GUI Value Range: -50~33 Actual Value Range: -50~33 Unit: dBm Default Value: None

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IdleSintrasearch


Meaning: Threshold for intra-frequency cell reselection in idle mode. When the quality (CPICH Ec/No measured by the UE) of the serving cell is lower than this threshold plus the [Qqualmin] of the cell, the intra-frequency cell reselection procedure will be started. This parameter is not configured when its value is 127. The intra-frequency cell reselection has a priority higher than the inter-frequency cell reselection and inter-RAT cell reselection, the intra-frequency cell reselection start threshold should be higher than the inter-frequency cell reselection start threshold and inter-RAT cell reselection start threshold. If the cell reselection threshold is set to a comparatively high value, the UE may frequently start cell reselections, and the battery of the UE may be largely consumed. If the cell reselection threshold is set to a comparatively low value, it is difficult for cell reselections to be started, and the UE may not timely reside in the cells with good quality, affecting the quality of communication between the UTRAN and the UE. For detailed information, refer to 3GPP TS 25.304. GUI Value Range: -16~10,127 Actual Value Range: {-32~20}, {127}, step:2 Unit: dB Default Value: 5

IdleSintersearch


Meaning: Threshold for inter-frequency cell reselection in idle mode. When the quality (CPICH Ec/No measured by UE) of the serving cell is lower than this threshold plus the [Qqualmin] of the cell, the inter-frequency cell reselection procedure will be started. This parameter is not configured when its value is 127. The intra-frequency cell reselection has a priority higher than the inter-frequency cell reselection and inter-RAT cell reselection, the intra-frequency cell reselection start threshold should be higher than the inter-frequency cell reselection start threshold and inter-RAT cell reselection start threshold. If the cell reselection threshold is set to a comparatively high value, the UE may frequently start cell reselections, and the battery of the UE may be largely consumed. If the cell reselection threshold is set to a comparatively low value, it is difficult for cell reselections to be started, and the UE may not timely reside in the cells with good quality, affecting the quality of communication between the UTRAN and the UE. For detailed information, refer to 3GPP TS 25.304. GUI Value Range: -16~10,127 Actual Value Range: {-32~20}, {127}, step:2 Unit: dB Default Value: 4

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8-5

SsearchRat BSC6900 ADD UCELLSELRESEL(Optional) MOD UCELLSELRESEL(Optional)

Meaning: Threshold for inter-RAT cell reselection. When the quality (CPICH Ec/No measured by UE) of the serving cell is lower than this threshold plus the [Qqualmin] of the cell, the inter-RAT cell reselection procedure will be started. This parameter is not configured when its value is 127. This parameter is not configured when its value is 127. The intra-frequency cell reselection has a priority higher than the inter-frequency cell reselection and inter-RAT cell reselection, the intra-frequency cell reselection start threshold should be higher than the inter-frequency cell reselection start threshold and inter-RAT cell reselection start threshold. If the cell reselection threshold is set to a comparatively high value, the UE may frequently start cell reselections, and the battery of the UE may be largely consumed. If the cell reselection threshold is set to a comparatively low value, it is difficult for cell reselections to be started, and the UE may not timely reside in the cells with good quality, affecting the quality of communication between the UTRAN and the UE. For detailed information, refer to 3GPP TS 25.304. GUI Value Range: -16~10,127 Actual Value Range: {-32~20}, {127}, step:2 Unit: dB Default Value: 2

SsearchHCS BSC6900 ADD UCELLHCS(Optional) MOD UCELLHCS(Optional)

Meaning: Intra-system HCS cell reselection start threshold. When Srxlev of the serving cell is less than this parameter, the UE starts the intra-frequency and inter-frequency measurements so that better cells can be selected. For details, refer to 3GPP TS 25.304. GUI Value Range: -53~45 Actual Value Range: -105~91, step:2 Unit: dB Default Value: 0

UseOfHcs BSC6900 ADD UCELLHCS(Optional) MOD UCELLHCS(Optional)

Meaning: Indicating whether HCS is used. For details, refer to 3GPP TS 25.304. GUI Value Range: USED, NOT_USED Actual Value Range: USED, NOT_USED Unit: None Default Value: NOT_USED

UseOfHcs BSC6900 ADD UEXT2GCELL(Optional) MOD UEXT2GCELL(Optional)

Meaning: This parameter indicates whether HCS is used. GUI Value Range: USED(HCS cell), NOT_USED(Non HCS cell) Actual Value Range: USED, NOT_USED Unit: None Default Value: NOT_USED

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8-6

UseOfHcs BSC6900 ADD UEXT3GCELL(Optional) MOD UEXT3GCELL(Optional)

Meaning: This parameter indicates whether HCS is used. GUI Value Range: USED(HCS cell), NOT_USED(Non HCS cell) Actual Value Range: USED, NOT_USED Unit: None Default Value: NOT_USED

SHCSRat BSC6900 ADD UCELLHCS(Optional) MOD UCELLHCS(Optional)

Meaning: Inter-system HCS cell reselection start threshold. When Srxlev of the serving cell is less than this parameter, the UE starts the inter-system measurement so that better cells can be selected. For details, refer to 3GPP TS 25.304. GUI Value Range: -53~45 Actual Value Range: -105~91, step:2 Unit: dB Default Value: 0

SlimitSearchRat

BSC6900 ADD UCELLHCS(Optional) MOD UCELLHCS(Optional)

Meaning: The UE does not start the inter-RAT measurement if it detects that the quality of the serving cell is higher than this threshold. For detailed information of this parameter, refer to 3GPP TS 25.304. GUI Value Range: -16~10 Actual Value Range: -32~20, step:2 Unit: dB Default Value: 0

IdleQoffset1sn BSC6900 ADD UINTERFREQNCELL(Optional) MOD UINTERFREQNCELL(Mandatory)

Meaning: Cell offset used for CPICH RSCP measurement value in cell selection or reselection when the UE is in idle mode. Offset of neighboring cell CPICH measurement value. This parameter is used for RSCP measurement. The offset is subtracted from the neighboring cell measurement value before cell reselection. In handover algorithms, this parameter is used for moving the border of a cell. This parameter can be configured by the Radio Network Planner (RNP) based on the actual network. If this parameter is set to a greater value, the probability for cell reselection reduces. Note that in FDD mode, this parameter is valid only when SIB11 Indicator is set as TRUE. For details, see 3GPP TS 25.331. GUI Value Range: -50~50 Actual Value Range: -50~50 Unit: dB Default Value: 0

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8-7

IdleQoffset1sn BSC6900 ADD UINTRAFREQNCELL(Optional) MOD UINTRAFREQNCELL(Mandatory)

Meaning: Cell offset used for CPICH RSCP measurement value in cell selection or reselection when the UE is in idle mode. Offset of neighboring cell CPICH measurement value. This parameter is used for RSCP measurement. The offset is subtracted from the neighboring cell measurement value before cell reselection. In handover algorithms, this parameter is used for moving the border of a cell. This parameter can be configured by the Radio Network Planner (RNP) based on the actual network. If this parameter is set to a greater value, the probability for cell reselection reduces. Note that in FDD mode, this parameter is valid only when SIB11 Indicator is set as TRUE. For details, see 3GPP TS 25.331. GUI Value Range: -50~50 Actual Value Range: -50~50 Unit: dB Default Value: 0

IdleQoffset2sn BSC6900 ADD UINTERFREQNCELL(Optional) MOD UINTERFREQNCELL(Mandatory)

Meaning: Cell offset used for CPICH Ec/No measurement value in cell selection or reselection when the UE is in idle mode. Offset of neighboring cell CPICH measurement value. This parameter is used for Ec/No measurement. The offset is subtracted from the neighboring cell measurement value before cell reselection.In handover algorithms, this parameter is used for moving the border of a cell. This parameter can be configured by the Radio Network Planner (RNP) based on the actual network. Note that in FDD mode, this parameter is valid only when SIB11 Indicator is set as TRUE. For details, see 3GPP TS 25.331. GUI Value Range: -50~50 Actual Value Range: -50~50 Unit: dB Default Value: 0

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8-8

IdleQoffset2sn BSC6900 ADD UINTRAFREQNCELL(Optional) MOD UINTRAFREQNCELL(Mandatory)

Meaning: Cell offset used for CPICH Ec/No measurement value in cell selection or reselection when the UE is in idle mode. Offset of neighboring cell CPICH measurement value. This parameter is used for Ec/No measurement. The offset is subtracted from the neighboring cell measurement value before cell reselection.In handover algorithms, this parameter is used for moving the border of a cell. This parameter can be configured by the Radio Network Planner (RNP) based on the actual network. Note that in FDD mode, this parameter is valid only when SIB11 Indicator is set as TRUE. For details, see 3GPP TS 25.331. GUI Value Range: -50~50 Actual Value Range: -50~50 Unit: dB Default Value: 0

QUALMEAS BSC6900 ADD UCELLSELRESEL(Optional) MOD UCELLSELRESEL(Optional)

Meaning: Measurement quantity of cell selection and reselection. It can be set to CPICH Ec/N0 or CPICH RSCP. For detailed information of this parameter, refer to 3GPP TS 25.304. GUI Value Range: CPICH_ECNO(CPICH Ec/N0), CPICH_RSCP(CPICH RSCP) Actual Value Range: CPICH_ECNO, CPICH_RSCP Unit: None Default Value: CPICH_ECNO

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8-9

IdleQhyst1s BSC6900 ADD UCELLSELRESEL(Optional) MOD UCELLSELRESEL(Optional)

Meaning: The hysteresis value of the serving FDD cells in idle mode in case the quality measurement for cell selection and reselection is set to CPICH RSCP. It is related to the slow fading feature of the area where the cell is located. The greater the slow fading variance is, the greater this parameter. According to the R regulation, the current serving cell involves in cell selection after the measurement value is added with the hysteresis value. The measurement hysteresis aims to prevent the ping-pong effect of the cell reselection, which is caused by the slow fading when the UE is on the edge of the cell. The ping-pong effect may trigger frequent location updates (idle mode), URA updates (URA_PCH), or cell updates (CELL_FACH, CELL_PCH), and thus increase the load of network signaling and the consumption of UE batteries. Set a proper measurement hysteresis to reduce as much as possible effect of the slow fading as well as ensuring timely cell updates of the UE. According to the CPICH RSCP emulation report of inter-frequency hard handovers, the measurement hysteresis ranges 4 dBm to 5 dBm and is set to 4 dBm by default when the slow fading variance is 8 dB and the relative distance is 20 m. In the cells where the slow fading variance is low and the average moving speed of UEs is high, for example the suburbs and countryside, reduce the measurement hysteresis to guarantee timely location updates of UEs. The higher the measurement hysteresis is, the less likely it is for various types of cell reselections to occur, and the better the slow fading resistance capability is, but the slower the system reacts to the environment changes. For detailed information of this parameter, refer to 3GPP TS 25.304. GUI Value Range: 0~20 Actual Value Range: 0~40, step:2 Unit: dB Default Value: 2

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8-10

IdleQhyst2s BSC6900 ADD UCELLSELRESEL(Optional) MOD UCELLSELRESEL(Optional)

Meaning: The hysteresis value of the serving FDD cells in idle mode in case the quality measurement for cell selection and reselection is set to CPICH Ec/No. It is related to the slow fading feature of the area where the cell is located. The greater the slow fading variance is, the greater this parameter. It is optional. If it is not configured, [Hysteresis 1] will be adopted as the value. This parameter is not configured when its value is 255. According to the R regulation, the current serving cell involves in cell selection after the measurement value is added with the hysteresis value. The measurement hysteresis aims to prevent the ping-pong effect of the cell reselection, which is caused by the slow fading when the UE is on the edge of the cell. The ping-pong effect may trigger frequent location updates (idle mode), URA updates (URA_PCH), or cell updates (CELL_FACH, CELL_PCH), and thus increase the load of network signaling and the consumption of UE batteries. Set a proper measurement hysteresis to reduce as much as possible effect of the slow fading as well as ensuring timely cell updates of the UE. According to the CPICH RSCP emulation report of inter-frequency hard handovers, the measurement hysteresis ranges 4 dBm to 5 dBm and is set to 4 dBm by default when the slow fading variance is 8 dB and the relative distance is 20 m. In the cells where the slow fading variance is low and the average moving speed of UEs is high, for example the suburbs and countryside, reduce the measurement hysteresis to guarantee timely location updates of UEs. The higher the measurement hysteresis is, the less likely it is for various types of cell reselections to occur, and the better the slow fading resistance capability is, but the slower the system reacts to the environment changes. For detailed information of this parameter, refer to 3GPP TS 25.304. GUI Value Range: 0~20,255 Actual Value Range: {0~40}, {255}, step:2 Unit: dB Default Value: 1

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8-11

Treselections BSC6900 ADD UCELLSELRESEL(Optional) MOD UCELLSELRESEL(Optional)

Meaning: If the signal quality (CPICH Ec/No measured by the UE) of a neighboring cell is better than that of the serving cell during the specified time of this parameter, the UE reselects the neighboring cell. It is used to avoid ping-pong reselection between different cells. Note that the value 0 corresponds to the default value defined in the protocol. Set the parameter as follows: 1. Ensure that the UE can reselect a cell when crossing the non-soft-switch area of the cell and that the UE timely performs location updates, cell updates, or URA updates when necessary. 2. Ensure that the UE does not reselect a cell when it is in the soft-switch area of the cell. In this way, the unnecessary location updates, cell updates, and URA updates are avoided. 3. Consider the difference between cells that cover different areas, for example the cells covering highways and cells covering densely populated areas. TIf the parameter is set to a comparatively low value, the ping-pong reselections may be caused. The parameter can be increased in populated area and reduced in high-speed movement. If the parameter is set to a comparatively high value, the cell reselection delay may become excessively high, and thus cell reselections may be affected. For detailed information, refer to 3GPP TS 25.304. GUI Value Range: 0~31 Actual Value Range: 0~31 Unit: s Default Value: 1

HCSPrio BSC6900 ADD UCELLHCS(Optional) MOD UCELLHCS(Optional)

Meaning: HCS priority of the cell belongs to. The parameter depends on HCS rules. For details, refer to 3GPP TS 25.304. GUI Value Range: 0~7 Actual Value Range: 0~7 Unit: None Default Value: 0

HCSPrio BSC6900 ADD UEXT2GCELL(Optional) MOD UEXT2GCELL(Optional)

Meaning: This parameter indicates the HCS priority level The smaller the coverage of the cell is, the higher the priority level of the cell should be set. GUI Value Range: 0~7 Actual Value Range: 0~7 Unit: None Default Value: 0

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8-12

HCSPrio BSC6900 ADD UEXT3GCELL(Optional) MOD UEXT3GCELL(Optional)

Meaning: This parameter indicates the HCS priority level The smaller the coverage of the cell is, the higher the priority level of the cell should be set. GUI Value Range: 0~7 Actual Value Range: 0~7 Unit: None Default Value: 0

Qhcs BSC6900 ADD UCELLHCS(Optional) MOD UCELLHCS(Optional)

Meaning: Quality threshold of HCS cell reselection. It can be used to calculate the quality level of the specified cell in HCS reselection H rules. GUI Value Range: 0~99 Actual Value Range: 0~99 Unit: dB/ dBm Default Value: 20

Qhcs BSC6900 ADD UEXT2GCELL(Optional) MOD UEXT2GCELL(Optional)

Meaning: Quality threshold for HCS reselection. GUI Value Range: 0~99 Actual Value Range: When CPICH Ec/No (FDD) is employed, unit for Qhcs is dB, physical value for each parameter value is: 0: -24 1: -23.5 2: -23 3: -22.5 ... 45: -1.5 46: -1 47: -0.5 48: 0 49: (spare) ... 98: (spare) 99: (spare) When CPICH RSCP (FDD) is employed, unit for Qhcs is dBm, physical value for each parameter value is: 0: -115 1: -114 2: -113 : 88: -27 89: -26 90: -(spare) 91: -(spare) : 98: -(spare) 99: -(spare) Unit: dB/ dBm Default Value: 20

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8-13

Qhcs BSC6900 ADD UEXT3GCELL(Optional) MOD UEXT3GCELL(Optional)

Meaning: Quality threshold for HCS reselection. GUI Value Range: 0~99 Actual Value Range: When CPICH Ec/No (FDD) is employed, unit for Qhcs is dB, physical value for each parameter value is: 0: -24 1: -23.5 2: -23 3: -22.5 ... 45: -1.5 46: -1 47: -0.5 48: 0 49: (spare) ... 98: (spare) 99: (spare) When CPICH RSCP (FDD) is employed, unit for Qhcs is dBm, physical value for each parameter value is: 0: -115 1: -114 2: -113 : 88: -27 89: -26 90: -(spare) 91: -(spare) : 98: -(spare) 99: -(spare) Unit: dB/ dBm Default Value: 20

TpenaltyHcsReselect

BSC6900 ADD U2GNCELL(Optional) MOD U2GNCELL(Optional)

Meaning: Specifies the penalty time for cell reselection. If this parameter is set to a greater value, the penalty time for HCS cell reselection is prolonged. If this parameter is set to a smaller value, the penalty time for HCS cell reselection is shortened. When the UE is in idle mode, the ping-pong reselections between HCS cells reduces if this parameter is set to a greater value. In this case, however, the hierarchical cell structure cannot be deployed effectively. GUI Value Range: D0, D10, D20, D30, D40, D50, D60 Actual Value Range: 0, 10, 20, 30, 40, 50, 60 Unit: s Default Value: D0

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8-14

TpenaltyHcsReselect

BSC6900 ADD UINTERFREQNCELL(Optional) MOD UINTERFREQNCELL(Optional)


TpenaltyHcsReselect

BSC6900 ADD UINTRAFREQNCELL(Optional) MOD UINTRAFREQNCELL(Optional)


TempOffset1 BSC6900 ADD U2GNCELL(Optional) MOD U2GNCELL(Optional)

Meaning: Cell offset used for CPICH RSCP measurement value in HCS cell selection. If this parameter is set to a greater value, the probability for selecting a neighboring cell reduces. If this parameter is set to a smaller value, the probability for selecting a neighboring cell increases. If this parameter is set to "INFINITY", a neighboring cell is not selected. GUI Value Range: D3~0 D6~1 D9~2 D12~3 D15~4 D18~5 D21~6 INFINITY Actual Value Range: 3, 6, 9, 12, 15, 18, 21, INFINITY Unit: dB Default Value: D3

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8-15

TempOffset1 BSC6900 ADD UINTERFREQNCELL(Optional) MOD UINTERFREQNCELL(Mandatory)


TempOffset1 BSC6900 ADD UINTRAFREQNCELL(Optional) MOD UINTRAFREQNCELL(Mandatory)


TempOffset2 BSC6900 ADD UINTERFREQNCELL(Optional) MOD UINTERFREQNCELL(Mandatory)

Meaning: Cell offset used for CPICH Ec/No measurement value in HCS cell selection. If this parameter is set to a greater value, the probability for cell reselection reduces. If this parameter is set to a smaller value, the probability for cell reselection increases. If this parameter is set to "INFINITY", a neighboring cell is not selected. GUI Value Range: D2~0 D3~1 D4~2 D6~3 D8~4 D10~5 D12~6 INFINITY Actual Value Range: 2, 3, 4, 6, 8, 10, 12, INFINITY Unit: dB Default Value: D2

TempOffset2 BSC6900 ADD UINTRAFREQNCELL(Optional) MOD UINTRAFREQNCELL(Mandatory)

Meaning: Cell offset used for CPICH Ec/No measurement value in HCS cell selection. If this parameter is set to a greater value, the probability for cell reselection reduces. If this parameter is set to a smaller value, the probability for cell reselection increases. If this parameter is set to "INFINITY", a neighboring cell is not selected. GUI Value Range: D2~0 D3~1 D4~2 D6~3 D8~4 D10~5 D12~6 INFINITY Actual Value Range: 2, 3, 4, 6, 8, 10, 12, INFINITY Unit: dB Default Value: D2

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8-16

DRXCYCLELENCOEF

BSC6900 ADD UCNDOMAIN(Optional) MOD UCNDOMAIN(Optional)

Meaning: CN domain specific Discontinuous Reception (DRX) cycle length coefficient broadcast on SIB1 and used by UEs in Idle Mode. GUI Value Range: 6~9 Actual Value Range: 6~9 Unit: None Default Value: 6

DRXCYCLELENCOEF

BSC6900 SET UFRC(Optional)

Meaning: UTRAN-specific Discontinuous Reception (DRX) cycle length coefficient. In connected mode, the UE uses the shorter one between CN-specific DRX cycle length coefficient and UTRAN-specific DRX cycle length coefficient. In idle mode, the UE can use the DRX mode to receive paging indications so as to reduce power consumption; in this case, the UE needs to monitor only one paging indication in one paging occasion during each DRX cycle. A value too small causes the UE to check the paging channel frequently, thus having great power consumption. A value too large makes the response of the UE to the paging slow and the core network repeatedly page the UE, thus increasing the downlink interference. GUI Value Range: 3~9 Actual Value Range: 3~9 Unit: None Default Value: 6

ConnSintersearch


Meaning: Threshold for inter-frequency cell reselection in connected mode. When the quality (CPICH Ec/No measured by UE) of the serving cell is lower than this threshold plus the [Qqualmin] of the cell, the inter-frequency cell reselection procedure will be started. This parameter is not configured when its value is 127. The intra-frequency cell reselection has a priority higher than the inter-frequency cell reselection and inter-RAT cell reselection, the intra-frequency cell reselection start threshold should be higher than the inter-frequency cell reselection start threshold and inter-RAT cell reselection start threshold. If the cell reselection threshold is set to a comparatively high value, the UE may frequently start cell reselections, and the battery of the UE may be largely consumed. If the cell reselection threshold is set to a comparatively low value, it is difficult for cell reselections to be started, and the UE may not timely reside in the cells with good quality, affecting the quality of communication between the UTRAN and the UE. For detailed information, refer to 3GPP TS 25.304. GUI Value Range: -16~10,127 Actual Value Range: {-32~20}, {127}, step:2 Unit: dB Default Value: 4

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8-17

ConnSintrasearch


Meaning: Threshold for intra-frequency cell reselection in connected mode. When the quality (CPICH Ec/No measured by the UE) of the serving cell is lower than this threshold plus the [Qqualmin] of the cell, the intra-frequency cell reselection procedure will be started. This parameter is not configured when its value is 127. The intra-frequency cell reselection has a priority higher than the inter-frequency cell reselection and inter-RAT cell reselection, the intra-frequency cell reselection start threshold should be higher than the inter-frequency cell reselection start threshold and inter-RAT cell reselection start threshold. If the cell reselection threshold is set to a comparatively high value, the UE may frequently start cell reselections, and the battery of the UE may be largely consumed. If the cell reselection threshold is set to a comparatively low value, it is difficult for cell reselections to be started, and the UE may not timely reside in the cells with good quality, affecting the quality of communication between the UTRAN and the UE. For detailed information, refer to 3GPP TS 25.304. GUI Value Range: -16~10,127 Actual Value Range: {-32~20}, {127}, step:2 Unit: dB Default Value: 5

Qrxlevmin BSC6900 ADD U2GNCELL(Optional) MOD U2GNCELL(Optional)

Meaning: Minimum RX level of the GSM cell. Before the UE camps on the cell, take the measurement of the signal quality in the cell. If the quality is better than this parameter, this indicates that the cell can obtain better QoS and the UE is allowed to camp on this cell. Otherwise, the UE cannot obtain good QoS in this cell and does not camp on the cell. GUI Value Range: -58~-13 Actual Value Range: -115~-25, step:2 Actual value = -115 + (58 + GUI value) * 2 Unit: dBm Default Value: -50

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8-18

Qrxlevmin BSC6900 ADD UCELLSELRESEL(Optional) MOD UCELLSELRESEL(Optional)

Meaning: The minimum required RX threshold corresponding to CPICH RSCP. The UE can camp on the cell only when the measured CPICH RSCP is greater than the value of this parameter. The setting of Qrxlevmin should be related to Qqualmin. The higher the parameter is, the more difficult it is for the UE to reside in the cell. The lower parameter is, the easier it is for the UE to reside in the cell, but it is possible that the UE cannot receive the system messages that are sent through the PCCPCH. For detailed information, refer to 3GPP TS 25.331 10.3.2.3. GUI Value Range: -58~-13 Actual Value Range: -115~-25, step:2 Unit: dBm Default Value: -58

Qrxlevmin BSC6900 ADD UEXT3GCELL(Mandatory) MOD UEXT3GCELL(Mandatory)

Meaning: This parameter defines the CPICH RSCP access threshold of the cell.This parameter is the minimum required RX level that corresponds to CPICH RSCP. The UE can camp on the cell only when the measured CPICH RSCP is greater than the value of this parameter. The settings of "Qrxlevmin" and "Qqualmin" should be considered along with each other. As for the impact on network performance: The larger the value of the parameter is, the more difficult it is for the UE to camp on the cell. The smaller the value of the parameter is, the easier it is for the UE to camp on the cell. But if the value is excessively small, it is possible that the UE cannot receive the system messages carried by PCCPCH. When this parameter is not set to any value, the UE adopts the corresponding value of the current serving cell, added through the ADD UCELLSELRESEL command. Generally, this parameter is not set to any value. GUI Value Range: -58~-13 Actual Value Range: -58~-13 Unit: dBm Default Value: None

TCRmax BSC6900 ADD UCELLHCS(Optional)

MOD UCELLHCS(Optional)

Meaning:Maximum duration of cell reselection. This parameter, along with the [Max number of cell reselection], is used for rate evaluation in HCS. For details, refer to 3GPP TS 25.304

GUI Value Range:NOT_USED, D30(30 seconds), D60(60 seconds), D120(120 seconds), D180(180 seconds), D240(240 seconds)

Actual Value Range:NOT_USED, 30, 60, 120, 180, 240

Default Value:D60

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8-19

CRMaxNum BSC6900 ADD UCELLHCS(Optional)


Meaning:Maximum number of cell reselection. This parameter, along with the [Time for evaluating max cell reselection], is used for rate evaluation in HCS. For details, refer to 3GPP TS 25.304

GUI Value Range:1~16

Actual Value Range:1~16

Default Value:8

TCrmaxHyst BSC6900 ADD UCELLHCS(Optional)


Meaning:Time before reverting to low-mobility measurement. For detailed information of this parameter, refer to 3GPP TS 25.304

GUI Value Range:NOT_USED, D10(10 seconds), D20(20 seconds), D30(30 seconds), D40(40 seconds), D50(50 seconds), D60(60 seconds), D70(70 seconds)

Actual Value Range:NOT_USED, 10, 20, 30, 40, 50, 60, 70

Default Value:D20

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UE Behaviors in Idle 9 Counters



9-1

9 Counters

For details, see the BSC6900 UMTS Performance Counter Reference.

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UE Behaviors in Idle 10 Glossary



10-1

10 Glossary

For the acronyms, abbreviations, terms, and definitions, see the Glossary.

Glossary.htm

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UE Behaviors in Idle 11 Reference Documents



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11 Reference Documents

[1] 3GPP, TS 22.011 "Service accessibility"

[2] 3GPP, TS 23.122 "NAS Functions related to Mobile Station (MS) in idle mode"

[3] 3GPP, TS 24.008 "Mobile radio interface layer 3 specification; Core Network Protocols - Stage 3"

[4] 3GPP, TS 25.304 "UE Procedures in Idle Mode and Procedures for Cell Reselection in Connected Mode"

[5] 3GPP, TS 25.331 "Radio Resource Control (RRC)"

[6] 3GPP, TS 31.102 "Characteristics of the USIM Application"

UE Behaviors in Idle

Documents

signaling

maxallowedul

tpenaltyhcsr

drxcyclele

plmnaccess

plmnaccess

add uinterfreqnc

add uintrafreqnc