ZTE LTE FDD Handover Feature Guide_V1.0

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  • ZTE LTE FDD Handover Feature Guide

    V1.0

  • ZTE LTE FDD Handover Feature Guide

    ZTE Confidential Proprietary 2013 ZTE CORPORATION. All rights reserved. 1

    LEGAL INFORMATION

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  • ZTE LTE FDD Handover Feature Guide

    ZTE Confidential Proprietary 2013 ZTE CORPORATION. All rights reserved. 2

    ZTE LTE FDD Handover Feature

    Guide

    Version Date Author Reviewer Notes

    V1.0 2013-7-14 Wang Huan

    Wu Hao Not open to the third party

  • ZTE LTE FDD Handover Feature Guide

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    TABLE OF CONTENTS

    1 INTRODUCTION ............................................................................................................... 2

    1.1 SCOPE ..................................................................................................................... 2

    1.2 TARGET GROUP .................................................................................................... 2

    1.3 FEATURE ATTRIBUTE ........................................................................................... 2

    1.4 CORRELATION WITH OTHER FEATURE ............................................................. 2

    2 TERMINOLOGY ................................................................................................................ 3

    2.1 SPECIFICATION NOTATIONS ............................................................................... 3

    3 TECHNICAL DESCRIPTIONS .......................................................................................... 4

    3.1 FEATURE DESCRIPTIONS .................................................................................... 4

    3.2 TECHNICAL DETAILS ............................................................................................. 4

    3.2.1 Measurement Configuration ................................................................................. 4

    3.2.2 Measurement Decision for Intra-Frequency Handover ........................................ 8

    3.2.3 Measurement Decision for Inter-Frequency Handover ........................................ 9

    3.2.4 Handover Decision from LTE to UTRAN ............................................................. 9

    3.2.5 Handover Decision from LTE to GERAN ........................................................... 10

    3.2.6 CSFB from LTE to Other RATs .......................................................................... 10

    3.2.7 Intra-Site Handover ............................................................................................ 10

    3.2.8 X2 Handover ...................................................................................................... 11

    3.2.9 Intra-RAT S1 Handover ...................................................................................... 13

    3.2.10 Inter-RAT Handover ........................................................................................... 14

    3.2.11 Redirection ......................................................................................................... 15

    4 KEY PARAMETER CONFIGURATION .......................................................................... 19

    4.1 PARAMETER LIST ................................................................................................ 19

    4.2 PARAMETER CONFIGURATION RULE ............................................................... 20

    4.3 PARAMETER CONFIGURATION PROCEDURE ................................................. 28

    4.3.1 Pre-Defined Parameters Configuration .............................................................. 28

    4.3.2 Activate Feature ................................................................................................. 30

    4.3.3 Other Parameter Configuration Procedure ........................................................ 37

    4.3.4 Deactivate Feature ............................................................................................. 38

    4.3.5 Data Save and Synchronization ......................................................................... 39

    5 RELATED COUNTERS, KPI AND ALARMS ................................................................. 39

    5.1 RELATED COUNTERS ......................................................................................... 39

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    5.2 RELATED KPI ........................................................................................................ 49

    5.3 RELATED ALARMS ............................................................................................... 50

    6 GLOSSARY .........................................................................................

  • ZTE LTE FDD Handover Feature Guide

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    FIGURES

    Figure 3-3-1 Intra-Frequency Handover Based on Coverage ......................................... 8

    Figure 4-1 Adding the Cell ............................................................................................. 28

    Figure 4-2 Cell Parameter Configuration ....................................................................... 29

    Figure 4-3 Automatic Neighbor Cell Configuration Tool .............................................. 29

    Figure 4-4 Neighbor Cell Relation Parameter Configuration ......................................... 30

    Figure 4-5 Measurement Event Configuration............................................................... 31

    Figure 4-6 Inter-Frequency Number and Configuration ............................................... 31

    Figure 4-7 X2 SCTP Configuration ................................................................................ 32

    Figure 4-8 X2AP Configuration .................................................................................... 33

    Figure 4-9 Disabling X2 ................................................................................................. 33

    Figure 4-10 UTRAN-FDD Neighbor Cell Configuration ............................................... 34

    Figure 4-11 UTRAN-FDD Neighbor Cell Relation Configuration................................... 34

    Figure 4-12 UTRAN Frequency Number and Parameters ............................................ 35

    Figure 4-13 UTRAN-FDD Neighbor Cell Relation Configuration................................... 36

    Figure 4-14 RAT Priority Configuration ......................................................................... 36

    Figure 4-15 Redirection Switch Configuration ............................................................... 37

    Figure 4-16 Event Index Related to Measurement Events .......................................... 38

    Figure 4-17 Parameter Configuration of Measurement Index ....................................... 38

    Figure 4-18 Deactivating Handover ............................................................................. 39

    TABLES

    Table 4-1 Handover Related Parameter List ............................................................... 19

    Table 4-2 Parameter rule of parameters ...................................................................... 20

    Table 5-1 Related Counters ....................................................................................... 39

    Table 5-2 Related KPI ................................................................................................ 49

  • ZTE LTE FDD Handover Feature Guide

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    1 Introduction

    1.1 Scope

    This document describes FDD handover feature or technology within the

    eNodeB in LTE network. The main contents comprise the following:

    technical description, key parameters and configuration, related counters,

    KPI statistics and alarms.

    1.2 Target Group

    This document is intended for:

    Engineering personnel and technicians

    Maintenance engineers

    1.3 Feature Attribute

    GUL: V4.12.10.15P40

    EMS: U31 V12.12.43P02

    OMMB: V12.12.40P26

    eNodeB: V3.10.20P02

    Involved NEs:

    UE eNodeB MME S-GW BSC/RNC SGSN P-GW HSS

    - - - - -

    Note:

    *-: Not involved

    *: involved

    1.4 Correlation with Other Feature

    No

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    2 Terminology

    2.1 Specification Notations

    Procedure

    When referring to an elementary procedure in the specification the

    Procedure Name is written with the first letters in each word in upper case

    characters followed by the word procedure, e.g., Random Access

    procedure.

    Message

    When referring to a message in the specification the MESSAGE NAME is

    written with all letters in upper case characters followed by the word

    message, e.g., The MME initiates the procedure by sending an E-RAB

    SETUP REQUEST message to the eNodeB.

    Parameter

    When referring to a parameter in the specification the parameter is

    written in Italic font, e.g., Band indicator of target ARFCN should be

    configured by byEutranFDDTarBand for LTE.

    IE

    When referring to an information element (IE) in the specification the

    Information Element Name is written with the first letters in each word in

    upper case characters and all letters in Italic font followed by the

    abbreviation IE, e.g., Information Element IE.

    Value of an IE

    When referring to the value of an information element (IE) in the

    specification the Value is written as it is specified enclosed by quotation

    marks, e.g., This IE shall be present if the Handover Type IE is set to the

    value LTEtoGERAN and the SRVCC HO Indication IE is present.

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    3 Technical Descriptions

    3.1 Feature Descriptions

    In LTE, UE mobility in RRC_CONNECTED state is realized by handover

    and redirection. In terms of Radio Access Technology (RAT), the handover

    can be divided into intra-RAT handover and inter-RAT handover (including

    UTRAN and GERAN). In terms of different frequency during the handover

    procedure, the intra-RAT handover can be divided into intra-frequency

    handover and inter-frequency handover.

    This document describes the measurement configuration, handover

    decision, and handover execution procedures.

    3.2 Technical Details

    3.2.1 Measurement Configuration

    After the UE initially accesses or hands over into a cell, or the eNB

    receives a measurement report from the UE, the eNB sends measurement

    configuration to the UE through an RRC CONNECTION

    RECONFIGURATION message.

    Measurement configuration related to handover will be sent to the UE in

    the following five scenarios:

    1. Only intra-frequency neighbor cells

    a) When the UE initially accesses a cell, the eNodeB sends the

    measurement configuration (A3 or A5 event) for

    intra-frequency handover to the UE. If the redirection function is

    enabled and there are available inter-frequency or inter-RAT

    frequencies, the A2 measurement event used for redirection is

    also sent to the UE.

    b) If the eNodeB receives the intra-frequency measurement report,

    it makes the handover decision and executes handover. If no

    measurement report is received, go to the next step.

    c) If the eNodeB receives the A2 measurement report used for

    redirection, it performs the blind redirection based on the

    procedure described in 3.2.11 Redirection.

    2. Only inter-frequency neighbor cells

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    a) When the UE initially accesses a cell, the eNodeB sends the

    A2 measurement event for opening inter-frequency

    measurement to the UE.

    b) After the eNodeB receives the A2 measurement report used for

    opening inter-frequency measurement, it sends the A3 or A5

    measurement event used for inter-frequency handover to the

    UE, and opens a gap. The eNodeB sends the A1 measurement

    event used for closing inter-frequency measurement to the UE,

    and deletes the A2 measurement event used for staring

    inter-frequency measurement. If the redirection function is

    enabled and there are available frequencies for redirection, the

    eNodeB sends the A2 measurement event used for redirection

    to the UE. Go to the next step.

    c) If the eNodeB receives the inter-frequency measurement report,

    it makes the handover decision and executes handover. If no

    measurement report is received, go to the next step.

    d) If the eNodeB receives the A2 measurement report used for

    redirection, it performs the blind redirection based on the

    procedure described in 3.2.11 Redirection. If no measurement

    report is received, go to the next step.

    e) After the eNodeB receives the A1 measurement report, it

    deletes the A1 measurement configuration, closes the gap, and

    deletes the measurement configuration used for

    inter-frequency handover. If there is A2 measurement

    configuration used for redirection, the eNodeB deletes the

    configuration and sends the A2 measurement event used for

    staring inter-frequency measurement to the UE, which means

    returning to state a).

    3. Only inter-RAT neighbor cells:

    a) When UE initially accesses a cell, the eNodeB sends the A2

    measurement event for staring inter-RAT measurement to the

    UE.

    b) After the eNodeB receives the A2 measurement report used for

    opening inter-RAT measurement, it sends the measurement

    configuration (B2 or B1 event) used for inter-RAT handover to

    UE, and opens a gap. The eNodeB sends the A1 measurement

    event used for stopping inter-RAT measurement, and deletes

    the A2 measurement event used for staring inter-RAT

    measurement. If the redirection function is enabled and there

    are available frequencies, the eNodeB sends the A2

    measurement event used for redirection to the UE.

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    c) If the eNodeB receives the inter-RAT measurement report, it

    makes the handover decision and executes handover. If no

    measurement report is received, go to the next step.

    d) If the eNodeB receives the A2 measurement report used for

    redirection, it performs the blind redirection based on the

    procedure described in 3.2.11 Redirection. If no measurement

    report is received, go to the next step.

    e) If the eNodeB receives the A1 measurement report, it deletes

    the A1 measurement configuration, closes the gap, and deletes

    the measurement configuration used for inter-RAT handover. If

    there is A2 measurement configuration used for redirection, the

    eNodeB deletes the configuration and sends the A2

    measurement event used for staring inter-RAT measurement

    to the UE, which means returning to state a).

    4. Both inter-frequency and inter-RAT neighbor cells exist, and

    interFandInterR is set to 0 (both inter-frequency and inter-RAT

    measurement commands are sent):

    a) When UE initially accesses a cell, the eNodeB sends the

    higher one of the thresholds of A2 measurements used for

    starting inter-frequency or inter-RAT measurements to the UE.

    This measurement event is called initial A2 measurement

    event.

    b) After the eNodeB receives the initial A2 measurement report, it

    sends the measurement configuration (A3 or A5 event) used

    for inter-frequency handover and measurement configuration

    (B2 or B1 event) used for inter-RAT handover to the UE. The

    eNodeB opens a gap, sends the A1 measurement event used

    for stopping inter-frequency/RAT measurement to the UE, and

    deletes the initial A2 measurement event. If the redirection

    function is enabled and there are available frequencies, the

    eNodeB sends the A2 measurement event used for redirection

    to the UE. Go to the next step.

    c) If the eNodeB receives the inter-frequency measurement report,

    it makes the handover decision and executes handover. If no

    measurement report is received, go to the next step.

    d) If the eNodeB receives the inter-RAT measurement report, it

    makes the handover decision and executes handover. If no

    measurement report is received, go to the next step.

    e) If the eNodeB receives the A2 measurement report used for

    redirection, it performs the blind redirection based on the

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    procedure described in 3.2.11 Redirection. If no measurement

    report is received, go to the next step.

    f) After the eNodeB receives the A1 measurement report, it

    deletes the A1 measurement configuration, closes the gap, and

    deletes the measurement configuration used for

    inter-frequency and inter-RAT handovers. If there is A2

    measurement configuration used for redirection, the eNodeB

    deletes the configuration and sends the initial A2 measurement

    event to the UE, which means returning to state a).

    5. Both inter-frequency and inter-RAT neighbor cells exist, and

    interFandInterR is set to 1 (inter-frequency measurement event is

    sent to the UE before inter-RAT measurement event):

    a) When the UE initially accesses a cell, the eNodeB sends the

    A2 measurement event for staring inter-frequency

    measurement to the UE.

    b) After the eNodeB receives the A2 measurement report, it

    sends the measurement configuration (A3 or A5 event) used

    for inter-frequency handover to the UE. The eNodeB deletes

    the A2 measurement event used for staring inter-frequency

    measurement, and sends the A2 measurement configuration

    (B2 or B1 event) used for starting inter-RAT measurement to

    the UE. The eNodeB opens a gap, and sends the A1

    measurement event used for stopping inter-frequency and

    inter-RAT measurement to the UE. Go to the next step.

    c) If the eNodeB receives the inter-frequency measurement report,

    it makes the handover decision and executes handover. If no

    measurement report is received, go to the next step.

    d) If the eNodeB receives the A1 measurement report, it deletes

    the measurement configuration used for inter-frequency

    handover. The eNodeB deletes the A2 measurement event

    used for staring inter-RAT measurement, and sends the A2

    measurement event used for starting inter-frequency

    measurement to the UE, which means returning to state a). If

    no measurement report is received, go to the next step.

    e) If the eNodeB receives the A2 measurement report used for

    starting inter-RAT measurement, it sends the measurement

    configuration (B2 or B1 event) used for inter-RAT handover to

    the UE. The eNodeB deletes the A2 measurement

    configuration used for starting inter-RAT measurement. If the

    redirection function is enabled and there are available

    frequencies, the eNodeB sends the A2 measurement

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    configuration used for redirection to the UE. Go to the next

    step.

    f) If the eNodeB receives the inter-RAT measurement report, it

    makes the handover decision and executes handover. If no

    measurement report is received, go to the next step.

    g) If the eNodeB receives the A2 measurement report used for

    redirection, it performs the blind redirection based on the

    procedure described in 3.2.11 Redirection. If no measurement

    report is received, go to the next step.

    h) If the eNodeB receives the A1 measurement report, it deletes

    the A1 measurement configuration, closes the gap, and deletes

    the measurement configuration used for inter-frequency and

    inter-RAT handovers. If there is A2 measurement configuration

    used for redirection, the eNodeB deletes the configuration and

    sends the A2 measurement event used for starting

    inter-frequency handover to the UE, which means returning to

    state a).

    3.2.2 Measurement Decision for Intra-Frequency

    Handover

    Figure 3-3-1 Intra-Frequency Handover Based on Coverage

    Cell A

    Freq 1

    Cell B

    Freq 1

    If the frequency used in the source cell and the frequency used in the

    target cell are the same, the handover is called intra-frequency handover.

    When the eNodeB receives the measurement report used for intra-frequency

    handover, it selects the handover target cell from the neighbor cell list in the

    measurement report.

    The target neighbor cell must meet the following requirements:

    1) The neighbor cell supports handover.

    2) The neighbor cell supports RRC_CONNECTED state.

    If there are multiple neighboring cells that meet the above requirements,

    the eNodeB sorts them based on the signal strength and initiates

    intra-frequency handovers to the cells in sequence.

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    3.2.3 Measurement Decision for Inter-Frequency

    Handover

    Figure 3-2 Inter-Frequency Handover Based on Coverage

    Cell A

    Freq 1

    Cell B

    Freq 2

    If the frequency used in the source cell and the frequency used in the

    target cell are different, the handover is called inter-frequency handover.

    When the eNodeB receives the measurement report used for inter-frequency

    handover, If the UE supports inter-frequency handover (FG bit 13), the eNodeB

    selects the handover target cell from the neighbor cell list in the measurement

    report.

    The target neighbor cell must meet the following requirements:

    1) The neighbor cell supports handover.

    2) The neighbor cell supports RRC_CONNECTED state.

    If there are multiple neighboring cells that meet the above requirements,

    the eNodeB sorts them based on the signal strength and initiates

    inter-frequency handovers to the cells in sequence.

    Note: If the handover is an intra-LTE inter-mode inter-frequency handover (the

    serving cell belongs to LTE FDD, and the neighbor cell in the measurement

    report belongs to TD LTE), for R8 terminals, only FG bit 13 is used to determine

    whether the UE supports inter-frequency handover, while for R9 or later

    terminals, FG bit 30 is also used to determine whether the UE supports

    inter-frequency handover.

    3.2.4 Handover Decision from LTE to UTRAN

    After the eNodeB receives the measurement report about UTRAN

    neighboring cells, it makes handover decision based on the UE capability

    and neighbor cell configuration. To perform PS HO, the following

    requirements must be met:

    1) The UE supports UTRAN PS Handover (FG bit 8).

    2) UTRAN supports PS handover.

    3) The neighbor relation supports handover.

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    If there are candidate cells that support PS HO, the eNodeB sorts the

    cells based on channel quality, and initiates inter-RAT handovers from the

    LTE cell to the UTRAN cells in sequence.

    3.2.5 Handover Decision from LTE to GERAN

    After the eNodeB receives the measurement report about GERAN

    neighbor cells, it makes handover decision based on the UE capability and

    neighbor cell configuration.

    To perform CCO, the following requirements must be met:

    1) The UE supports CCO (FG bit 10).

    If there are candidate cells that support CCO, the eNodeB sorts the cells

    based on channel quality, and initiates inter-RAT handovers from the LTE

    cell to the GERAN cells in sequence.

    Note: PS HO from LTE to GERAN is not supported in the current

    version.

    3.2.6 CSFB from LTE to Other RATs

    In the initial deployment phase of LTE, the core network is not equipped

    with IMS, and the LTE network cannot provide voice services. In this case,

    voice services can be directed to other RATs by CS fallback. When the

    eNodeB receives MME INITIAL CONTEXT SETUP REQUEST message or

    UE CONTEXT MODIFICATION REQUEST message, and CS Fallback

    Indicator IE is contained, it starts the CSFB procedure. There are two CSFB

    modes: blind CSFB and CSFB based on measurements.

    1) CSFB from LTE to UTRAN

    When the UE initiates the voice service, LTE moves the UE to UTRAN

    by PS HO or Redirection. The voice service is provided by UTRAN.

    2) CSFB from LTE to GERAN

    When the UE initiates the voice service, LTE moves the UE to GERAN

    by PS HO, CCO, or Redirection. The voice service is provided by GERAN.

    For more details, refer to the documents related to CSFB.

    3.2.7 Intra-Site Handover

    When the source cell and target cell involved in a handover are in the

    same eNodeB, the handover is called intra-site handover.

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    Figure 3-3 Intra-Site Handover

    Source Cell UE Target cell

    RRcConnectionReconfiguration

    Random Access Procedure

    RRcConnectionReconfigurationComplete

    The intra-site handover procedure is described as follows:

    1) The source cell sends an RRC CONNECTION

    RECONFIGURATION message (containing mobilityControlInfo IE)

    to the UE, instructing the UE to access the target cell.

    2) The UE initiates random access to the target cell.

    3) When the UE accesses the target cell, it sends an RRC

    CONNECTION RECONFIGURATION COMPLETE message to the

    target cell to confirm that the handover is successful.

    3.2.8 X2 Handover

    Figure 3-4 X2 Handover

    UETarget

    eNodeB

    Source

    eNodeB

    RRcConnectionReconfiguration

    Random Access Procedure

    RRcConnectionReconfigurationComplete

    MME/S-GW

    HandoverRequest

    HandoverRequestAcknowledge

    SNStatusTransfer

    PathSwitchRequest

    PathSwitchRequestAcknowledge

    Data Forwarding

    The X2 handover procedure is described as follows:

    1) The source eNodeB sends a HANDOVER REQUEST message to

    the target eNodeB, including necessary information for handover.

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    2) The target eNodeB prepares for handover at Layer 1 and layer 2,

    establishes the user-plane path for data forwarding, and sends a

    HANDOVER REQUEST ACKNOWLEDGE message to the source

    eNodeB. If data forwarding is required, a path for uplink data

    forwarding and a path for downlink data forwarding are established

    for each E-RAB. The HANDOVER REQUEST ACKNOWLEDGE

    message contains a container, which contains an RRC

    CONNECTION RECONFIGURATION message with

    MobilityControlInfo IE contained in the message.

    3) The source eNodeB sends an RRC CONNECTION

    RECONFIGURATION message (containing MobilityControlInfo IE)

    to the UE, instructing the UE to access to the target eNodeB.

    4) The source eNodeB sends an SN STATUS TRANSFER message to

    the target eNodeB, to transmit the uplink PDCP SN receiving status

    and downlink PDCP SN transmitting status of each E-RAB.

    5) The source eNodeB establishes the user-plane path for data

    forwarding, and transmits user data to the target eNodeB.

    6) The UE performs downlink synchronization and random access to

    the target cell.

    7) After the UE accesses the target cell, it sends an RRC

    CONNECTION RECONFIGURATION COMPLETE message to the

    target cell to confirm the handover is successful.

    8) The target eNodeB sends a PATH SWITCH message to the MME,

    and inform the MME that the UE has changed its serving cell.

    9) After the MME receives the PATH SWITCH message, it sends the

    PATH SWITCH ACKNOWLEDGE message to the target eNodeB.

    10) The X2 handover procedure ends.

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    3.2.9 Intra-RAT S1 Handover

    Figure 3-5 Intra-RAT S1 Handover

    The S1 handover procedure is described as follows:

    1) The source eNodeB sends a HANDOVER REQUIRED message to

    the MME, instructing whether data forwarding is required (indicated

    by DL Forwarding IE) for each E-RAB and whether the direct

    forwarding path from the source eNodeB to target eNodeB is

    available (indicated by Direct Forwarding Path Availability IE).

    2) The MME sends a HANDOVER REQUEST message to the target

    eNodeB. The target eNodeB establishes the UE context after

    receiving the message.

    3) The target eNodeB prepares for handover with Layer 1 and layer 2,

    establishes the user-plane path for data forwarding, and sends a

    HANDOVER REQUEST ACKNOWLEDGE message to the MME.

    The RRC message used for handover is contained in Target to

    Source Transparent Container IE of this message.

    4) The MME sends a HANDOVER COMMAND message to the source

    eNodeB. Bearers Subject to Forwarding IE of this message contains

    the address list and TEID for data forwarding allocated by the target

    UETarget

    eNodeB

    Source

    eNodeB

    RRcConnectionReconfiguration

    Random Access Procedure

    RRcConnectionReconfigurationComplete

    MME/S-GW

    HandoverRequired

    HandoverRequestAcknowledge

    eNBStatusTransfer

    HandoverNotify

    UeContextReleaseCommand

    Only for Direct Data Forwarding

    HandoverRequest

    HandoverCommand

    MMEStatusTransfer

    Only for Indirect Data Forwarding

    UeContextReleaseComplete

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    eNodeB. If the source eNodeB uses indirect path for data forwarding,

    the MME and SGW prepare the user-plane path for data forwarding.

    5) The source eNodeB sends an RRC CONNECTION

    RECONFIGURATION message to the UE, and informs the UE to

    move to the target cell.

    6) The source eNodeB sends eNodeB a STATUS TRANSFER

    message to the MME, with the uplink PDCP SN receiving status and

    downlink PDCP SN transmitting status of each E-RAB.

    7) The MME sends an MME STATUS TRANSFER message to the

    target eNodeB.

    8) The source eNodeB starts data forwarding on the direct path or

    indirect path determined before.

    9) The UE initiates random access to the target cell.

    10) When the UE accesses the target cell, it sends an RRC

    CONNECTION RECONFIGURATION COMPLETE message to the

    target cell to confirm that the handover is successful.

    11) The target eNodeB sends a HANDOVER NOTIFY message to the

    MME to confirm the UE successfully accesses the target eNodeB.

    12) The MME sends a UE CONTEXT RELEASE COMMAND message

    to the source eNodeB.

    13) The source eNodeB releases the UE related resources, and sends a

    UE CONTEXT RELEASE COMPLETE message to the MME.

    14) The S1 handover procedure ends.

    3.2.10 Inter-RAT Handover

    E-UTRAN sends a MOBILITY FROM EUTRA COMMAND message

    (with Handover or CellChangeOrder IE) to the UE in RRC_CONNECTED

    state, and indicates the UE to perform PS HO to UTRAN or perform PS HO

    or CCO to GERAN.

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    Figure 3-6 Inter-RAT Handover

    The inter-RAT handover procedure is described as follows:

    1) The eNodeB sends a HandoverRequired message to the MME, and

    the MME interacts with the target RAT. The target RAT establishes

    the UE context.

    2) After MME interacts with the target RAT, it sends a Handover

    Command message to the eNodeB.

    3) The eNodeB sends a MobilityFromEutraCommand message to the

    UE, and the UE performs random access to the inter-RAT system

    cell.

    4) After the UE successfully accesses the target cell, the MME informs

    the source eNodeB to release the UE context.

    3.2.11 Redirection

    The mobility in RRC_CONNECTED state is realized by PS HO, CCO,

    and Redirection. The priority based on time delay:

    PS HO > CCO > Redirection

    When PS handover and CCO are not supported, the eNodeB indicates

    the UE to perform redirection by redirectedCarrierInfo IE in the RRC

    CONNECTION RELEASE message.

    There are two redirection types: blind redirection and redirection based

    on measurements.

    1. Blind Redirection:

    UE eNB MME

    MeasurementReport

    HandoverRequired

    HandoverCommand

    MobilityFromEutraCommand

    UeContextReleaseCommand

    UeContextReleaseComplete

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    Figure 3-7 Blind Redirection

    After the eNodeB receives the A2 measurement report used for blind

    redirection, it makes the redirection decision.

    1) The eNodeB selects the highest priority RAT that the UE

    supports in RAT priorities (ratPriorityPara), and go to the next

    step.

    2) The eNodeB selects the highest priority (non zero) frequency

    that the UE supports as the target frequency. If there are

    available frequencies, go to step 4. If there are no available

    frequencies, go to the next step.

    3) If there are no available frequencies in the target RAT, the

    eNodeB selects the second highest priority RAT that UE

    supports as the target RAT. Return to 2).

    4) The eNodeB sends the selected frequencies to the UE.

    2. Redirection based on measurements:

    UE CONTEXT RELEASE COMPLETE

    eNodeB

    UE CONTEXT RELEASE COMMAND

    MME

    UE CONTEXT RELEASE REQUEST

    UE

    MEASUREMENT REPORT

    RRCC ONNECTION RELEASE

    (A2 measurement report

    for redirection)

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    Figure 3-8 Inter-Frequency Redirection Based on Measurements

    1) Inter-frequency Redirection:

    After the eNodeB receives the measurement report used

    for inter-frequency handover, it indicates the UE to perform

    redirection to the frequency in the measurement report when

    the following requirements are met:

    a) The UE does not support inter-frequency handover, or (and)

    the neighboring cell does not support handover, or

    b) Only unknown PCIs are contained in the measurement

    report, or

    c) Unknown PCIs are contained in the measurement report,

    and all known PCIs have failed for handover, and

    d) No cell in the measurement report is in the handover limit

    list.

    2) Inter-RAT Redirection:

    UE CONTEXT RELEASE COMPLETE

    eNodeB

    UE CONTEXT RELEASE COMMAND

    MME

    UE CONTEXT RELEASE REQUEST

    UE

    MEASUREMENT REPORT

    RRCC ONNECTION RELEASE

    (Measurement report for

    inter-frequency handover)

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    Figure 3-9 Inter-RAT Redirection Based on Measurements

    After the eNodeB receives the measurement report used

    for inter-RAT handover, it indicates the UE to perform

    redirection to the RART and frequency in the measurement

    report when the following requirements are met:

    a) The UE does not support inter-RAT handover, or (and) the

    neighboring cell does not support handover, and

    b) When the RAT in the measurement report is GERAN, and

    the UE does not support CCO, or

    c) Only unknown PCIs are contained in the measurement

    report, or

    d) Unknown PCIs are contained in the measurement report,

    and all known PCIs have failed for handover, and

    After the UE receives an RRC CONNECTION RELEASE message with

    redirectedCarrierInfo IE, it performs redirection to the frequency in the target

    RAT.

    UE CONTEXT RELEASE COMPLETE

    eNodeB

    UE CONTEXT RELEASE COMMAND

    MME

    UE CONTEXT RELEASE REQUEST

    UE

    MEASUREMENT REPORT

    RRCC ONNECTION RELEASE

    (Measurement report for

    inter-RAT handover)

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    4 Key Parameter Configuration

    4.1 Parameter List

    Table 4-1 Handover Related Parameter List

    SN Name Figure

    1 Band indication for frequency Figure 4-1,4-2

    2 Uplink center carrier frequency Figure 4-1,4-2

    3 Downlink center carrier frequency Figure 4-1,4-2

    4 Physical cell id Figure 4-1,4-2

    5 Close inter-frequency or intersystem measurement

    configuration index

    Figure 4-5

    6 Open inter-frequency measurement configuration

    index

    Figure 4-5

    7 Coverage-based intra-frequency handover

    measurement configruration index

    Figure 4-5

    8 InterFreq measurement configuration index for

    handover

    Figure 4-5

    9 Inter-frequency number Figure 4-6

    10 Band indicator for DL frequency Figure 4-6

    11 Inter-frequency Figure 4-6

    12 Switch for not to remove neighboring cell Figure 4-4

    13 Switch for X2 Figure 4-4

    14 Switch for HO Figure 4-4

    15 S1 handover data direct forward supported Figure 4-4

    16 Uplink center carrier Frequency Figure 4-10

    17 Downlink center carrier frequency Figure 4-10

    18 RNC ID Figure 4-10

    19 Cell ID Figure 4-10

    20 Cell primary scrambling code Figure 4-10

    21 Location Area Code Figure 4-10

    22 Routing Area Code Figure 4-10

    23 Frequency band indication of UTRAN Figure 4-10

    24 UTRAN neighbor cell supported PS HO Figure 4-10

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    25 Handover support Figure 4-11

    26 UTRAN-frequency number Figure 4-12

    27 RAT priority Figure 4-14

    28 Redirection algorithm for coverage Figure 4-15

    4.2 Parameter Configuration Rule

    Table 4-2 Parameter rule of parameters

    SN Name Description Value Range Default

    Value

    1

    Band

    indication

    for

    frequency

    The parameter

    indicates the

    frequency

    band for

    downlink and

    uplink

    frequency. The

    downlink and

    uplink

    frequency is

    own to the

    sanme band.

    1-5,7-14,17-28,101 1

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    2

    Uplink

    center

    carrier

    frequency

    The parameter

    indicates the

    uplink E-UTRA

    Absolute

    Radio

    Frequency

    Channel

    Number

    (EARFCN).

    1:1920-1980,

    2:1850-1910,

    3:1710-1785,

    4:1710-1755,

    5:824-849,

    7:2500-2570,

    8:880-915,

    9:1749.9-1784.9,

    10:1710-1770,11:1427.9

    -1452.9,

    12:698-716,

    13:777-787,

    14:788-798, 17:704-716,

    18:815-830,19:830-845,

    20:832-862,21:1447.9-1

    462.9,

    22:3410-3490,23:2000-2

    020,

    24:1626.5-1660.5,25:18

    50-1915,

    26:814-849,27:807-824,

    28:703-748,101:962-977

    1930

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    3

    Downlink

    center

    carrier

    frequency

    The parameter

    indicates the

    downlink

    E-UTRA

    Absolute

    Radio

    Frequency

    Channel

    Number

    (EARFCN).

    1:1920-1980,

    2:1850-1910,

    3:1710-1785,

    4:1710-1755,

    5:824-849,

    7:2500-2570,

    8:880-915,

    9:1749.9-1784.9,

    10:1710-1770,11:1427.9

    -1452.9,

    12:698-716,

    13:777-787,

    14:788-798, 17:704-716,

    18:815-830,19:830-845,

    20:832-862,21:1447.9-1

    462.9,

    22:3410-3490,23:2000-2

    020,

    24:1626.5-1660.5,25:18

    50-1915,

    26:814-849,27:807-824,

    28:703-748,101:962-977

    2120

    4

    Physical

    cell id

    The parameter

    is used to

    identify a cell.

    There are 504

    unique

    physical-layer

    cell identities.

    0-503 0

    5 Close

    inter-frequ

    ency or

    intersyste

    m

    measurem

    ent

    configurati

    on index

    The parameter

    is used to

    close

    inter-frequency

    measurement

    1-2048 10

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    6 Open

    inter-frequ

    ency

    measurem

    ent

    configurati

    on index

    The parameter

    is used to open

    inter-frequency

    measurement.

    1-2048 11

    7 Coverage-

    based

    intra-frequ

    ency

    handover

    measurem

    ent

    configrurati

    on index

    The parameter

    is used to

    config

    intra-frequency

    measurement.

    1-2048 50

    8 InterFreq

    measurem

    ent

    configurati

    on index

    for

    handover

    The parameter

    is used to

    config

    inter-frequency

    measurement.

    1-2048 70

    9

    Inter-frequ

    ency

    number

    The parameter

    is used to

    indicate the

    number of

    inter-frequency

    0-8 0

    10 Band

    indicator

    for DL

    frequency

    The band of dl

    frequency

    1-5,7-14,17-28,30-32,33

    -43,101 1

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    11

    Inter-frequ

    ency

    The

    paramet

    er

    indicate

    s the

    downlin

    k

    E-UTRA

    Absolut

    e Radio

    Frequen

    cy

    Channel

    Number

    (EARFC

    N) of

    inter-fre

    quency.

    freqBandInd==1[2110-2170],

    freqBandInd==2[1930-1990],

    freqBandInd==3[1805-1880],

    freqBandInd==4[2110-2155],

    freqBandInd==5[869-894],

    freqBandInd==7[2620-2690],

    freqBandInd==8[925-960],

    freqBandInd==9[1844.9-1879.9],

    freqBandInd==10[2110-2170],

    freqBandInd==11[1475.9-1500.9],

    freqBandInd==12[728-746],

    freqBandInd==13[746-756],

    freqBandInd==14[758-768],

    freqBandInd==17[734-746],

    freqBandInd==18[860-875],

    freqBandInd==19[875-890],

    freqBandInd==20[791 -821],

    freqBandInd==21[1495.9-1510.9],

    freqBandInd==22[3510..3590],

    freqBandInd==23[2180..2200],

    freqBandInd==24[1525..1559],

    freqBandInd==25[1930..1995],

    freqBandInd==26[859..894],

    freqBandInd==27[852..869],

    freqBandInd==28[758..803],

    freqBandInd==30[380-430],

    freqBandInd==31[1447-1467],

    freqBandInd==32[1785-1800],

    freqBandInd==33[1900-1920],

    freqBandInd==34[2010-2025],

    freqBandInd==35[1850-1910],

    freqBandInd==36[1930-1990],

    freqBandInd==37[1910-1930],

    freqBandInd==38[2570-2620],

    freqBandInd==39[1880-1920],

    freqBandInd==40[2300-2400],

    freqBandInd==41[2496-2690],

    freqBandInd==42[3400-3600],

    freqBandInd==43[3600-3800]

    freqBandInd==101[1037-1057]

    N/A

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    12 Switch for

    removing

    neighborin

    g cell

    the Switch for

    the LTE

    adjacent-Cell

    not being

    removed

    No[0],Yes [1] Yes [1]

    13

    Switch for

    X2

    the Switch for

    X2 PS HO not

    being

    supported

    No[0],Yes [1] Yes [1]

    14

    Switch for

    HO

    the Switch for

    both S1 and

    X2 PS HO not

    being

    supported

    No[0],Yes [1] Yes [1]

    15 S1

    handover

    data direct

    forward

    supported

    the enalbe

    Flag that S1

    HO Data

    Direct Forward

    can be done

    No[0],Yes [1] No[0]

    16

    Uplink

    center

    carrier

    Frequency

    UL Center

    carrier

    frequency

    (I:1922.4-1977.6,

    II:1852.4-1907.6,

    III:1712.4-1782.6,

    IV:1712.4-1752.6,

    V:826.4-846.6,

    VI:832.4-837.6,VII:2502.

    4-2567.6,

    VIII:882.4-912.6,

    IX:1752.4-1782.4,

    X:1712.4-1767.6,

    XI:1430.4-1445.4,

    XII:701.4-713.6,

    XIII:779.4-784.6,

    XIV:790.4-795.6,XIX:83

    2.4-842.6,XX:834.4-859.

    6,XXI:1450.4-1460.4,

    XXII:3412.4-3487.6,XXV

    :1852.4-1912.6,XXVI:81

    6.4-846.6)MHz,step

    0.2MHz

    N/A

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    17

    Downlink

    center

    carrier

    frequency

    Downlink

    center carrier

    frequency

    (I:2112.4-2167.6,

    II:1932.4-1987.6,

    III:1807.4-1877.6,

    IV:2112.4-2152.6,

    V:871.4-891.6,

    VI:877.4-882.6,VII:2622.

    4-2687.6, VIII:927.4-

    957.6,

    IX:1847.4-1877.4,

    X:2112.4-2167.6,

    XI:1478.4-1493.4,

    XII:731.4-743.6,

    XIII:748.4-753.6,

    XIV:760.4-765.6,

    XIX:877.4-887.6,XX:793

    .4-818.6,XXI:1498.4-

    1508.4,XXII:3512.4-358

    7.6,XXV:1932.4-1992.6,

    XXVI:861.4-891.6)MHZ,

    step 0.2MHZ

    N/A

    18 RNC ID

    This parameter

    represents the

    RNC ID or

    Extended RNC

    ID of a FDD

    UTRAN

    neighboring

    cell. When the

    value of the

    parameter is in

    the range of 0

    ~ 4095, it

    represents the

    RNC ID; When

    the value of

    the parameter

    is in the range

    of 4096 ~

    65535, it

    represents the

    Extended RNC

    ID.

    0-65535 0

    19 Cell ID Cell ID [0..65535] 0

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    20

    Cell

    primary

    scrambling

    code

    Primary

    scrambling

    code [0..127] 0

    21 Location

    Area Code

    Location area

    code of a cell

    [1..65533],[65535..6553

    5]

    It is a Number Text

    1

    22 Routing

    Area Code

    Routing Area

    Code 0-255 0

    23

    Band

    Indicator

    for FDD

    DL

    Frequency

    Band class of

    UTRAN FDD

    cell

    0:1,1:2,2:3,3:4,4:5,5:6,6:

    7,7:8,8:9,9:10,10:11,11:

    12,12:13,13:14,14:19,16

    :20,15:21,17:22,18:25,1

    9:26

    1[0]

    24

    UTRAN

    neighbor

    cell

    supported

    PS HO

    PS HO

    capbility for

    UTRAN FDD

    neighbour cell

    0:No,1:Yes Yes

    25 Handover

    support

    PS Handover

    enable

    indication of

    the UTRAN

    adjacent-Cell

    0: not support;1:support Support

    26

    UTRAN-fre

    quency

    number

    UTRAN-freque

    ncy number 0-32 0

    27 RAT

    priority

    RAT priority

    0-255

    FDD:[255,2

    54,0,0,0,0,0

    ],

    28

    Redirectio

    n algorithm

    for

    coverage

    This is a switch

    for the

    algorithm

    applied for

    coverage

    based redirect.

    0:Close

    1:Open Open

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    4.3 Parameter Configuration Procedure

    4.3.1 Pre-Defined Parameters Configuration

    1. Configure the correct cell. In the Configuration Management window on

    the EMS, click Modify Area > Managed Element > Radio Parameter >

    LTE FDD > E-UTRAN FDD Cell. Click the button to add the correct

    cell. The parameters such as frequency, PCI, and bandwidth must meet the

    test requirements. Click the button to save the configuration, and

    synchronize the configuration data to the eNodeB, see Figure 4-1 and

    Figure 4-2.

    Figure 4-1 Adding the Cell

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    Figure 4-2 Cell Parameter Configuration

    2. Add the correct neighbor cell relation by using the neighbor cell

    configuration tool. In the Configuration Management window on the EMS,

    click Configuration > Neighbor Cell Management, and configure the

    correct neighbor cells and neighbor cell relation. Follow the steps shown in

    Figure 4-3.

    Figure 4-3 Automatic Neighbor Cell Configuration Tool

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    4.3.2 Activate Feature

    4.3.2.1 Intra-Site Handover Activation

    1. After the neighbor cells are added by using the automatic neighboring cell

    configuration tool, click Modify Area > Managed Element > Radio

    Parameter > LTE FDD > Neighbor Relation Configuration > E-UTRAN

    Neighbor Relation and check whether the intra-site (intra-card or inter-card)

    handover records exist, see Figure 4-4.

    Figure 4-4 Neighbor Cell Relation Parameter Configuration

    2. Correctly configure the intra-frequency and inter-frequency measurement

    events. Click Modify Area > Managed Element->Radio Parameter > LTE

    FDD > E-UTRAN FDD Cell > Measurement Parameter, and check the

    configuration of the intra-frequency and inter-frequency measurement

    events. Use the default configuration, see Figure 4-5.

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    Figure 4-5 Measurement Event Configuration

    3. For inter-frequency handover, check whether the inter-frequencies are

    added. In general, the automatic neighbor cell configuration tool

    automatically adds the inter-frequencies. Click Modify Area > Manged

    Element > Radio Parameter > LTE FDD > E-UTRAN FDD Cell >

    Measurement Parameter, Configure the Inter-Frequency Number and

    Inter-Frequency Measurement Configuration, see Figure 4-6, If you want

    to test inter-frequency handover, the Inter-Frequency Number should not be

    zero.

    Figure 4-6 Inter-Frequency Number and Configuration

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    4.3.2.2 S1 and X2 Handover Activation

    1. After the neighbor cells are added by using the automatic neighbor cell

    configuration tool, click Modify Area > Managed Element > Radio

    Parameter > LTE FDD > Neighbor Cell Configuration > E-UTRAN

    Neighbor Cell and click Modify Area-> Manged Element > Radio

    Parameter > LTE FDD > Neighbor Relation Configuration > E-UTRAN

    Neighbor Relation to check whether the inter-site (S1 or X2) handover

    records exist.

    2. Check the parameters configured by the automatic neighbor cell

    configuration tool. Use the default configuration, see Figure 4-5 and Figure

    4-6.

    3. Add X2 SCTP for X2 handover. Click Modify Area > Managed Element >

    Transmission Network > Signaling and Business > SCTP. Click to

    add the X2 SCTP link, see Figure 4-7. X2AP will be automatically added,

    see Figure 4-8.

    Figure 4-7 X2 SCTP Configuration

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    Figure 4-8 X2AP Configuration

    4. After X2 handover is configured, sometimes S1 handover may also be

    needed. Delete the X2 connection or disable X2 to perform S1 handover.

    Click Modify Area > Managed Element > Radio Parameter > LTE FDD >

    Neighbor Relation Configuration > E-UTRAN Neighbor Relation. Modify

    the switch for X2 to No[0], and perform S1 handover, see Figure 4-9.

    Figure 4-9 Disabling X2

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    4.3.2.3 Inter-RAT Handover Activation

    1. For inter-RAT handover (LTE to 3G/2G), add the neighbor cells and

    configure the neighbor cell relation. Click Modify Area > Managed

    Element > Radio Parameter > LTE FDD > Neighbor Cell Configuration >

    UTRAN FDD Neighbor Cell, see Figure 4-10. Click Modify Area->

    Managed Element->Radio Parameter -> LTE FDD ->Neighbor Relation

    Configuration->UTRAN-FDD Neighbor Relation, see Figure 4-11.

    Figure 4-10 UTRAN-FDD Neighbor Cell Configuration

    Figure 4-11 UTRAN-FDD Neighbor Cell Relation Configuration

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    2. Click Modify Area > Managed Element > Radio Parameter > LTE FDD >

    E-UTRAN FDD Cell > Measurement Parameter to configure the UTRAN

    frequencies and number in the measurement configuration. The configured

    frequencies should be the same with the UTRAN-FDD neighbor cells. Set

    the frequency priority to the default value, see Figure 4-12.

    Figure 4-12 UTRAN Frequency Number and Parameters

    4.3.2.4 Inter-RAT Redirection Activation

    1. For inter-RAT redirection based on measurements, configure the inter-RAT

    neighboring cells, see Figure 4-10. Click Modify Area > Managed Element >

    Radio Parameter > LTE FDD > Neighbor Relation Configuration >

    UTRAN-FDD Neighbor Relation to configure the neighbor cell relation, see

    Figure 4-13.

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    Figure 4-13 UTRAN-FDD Neighbor Cell Relation Configuration

    2. For blind Redirection, configure the redirection frequencies in the

    measurement configuration, see Figure 4-12. The frequency priority must be

    non-zero values. Click Modify Area > Managed Element > Radio

    Parameter > LTE FDD > E-UTRAN FDD Cell > Measurement Parameter

    to configure the RAT priority, see Figure 4-14.

    Figure 4-14 RAT Priority Configuration

    3. Click Modify Area > Managed Element > Radio Parameter > LTE FDD >

    E-UTRAN FDD Cell, and set Redirection Algorithm for Coverage to

    Open[1], see Figure 4-15.

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    Figure 4-15 Redirection Switch Configuration

    4.3.3 Other Parameter Configuration Procedure

    1. For measurement event modification (in general, the default value is

    acceptable), click Modify Area > Managed Element > Radio Parameter >

    LTE FDD > E-UTRAN FDD Cell > Measurement Parameter to check the

    event ID, for example, the default values of Open Inter Frequency

    Measurement Configuration Index are 20 (RSRP, commonly used) and

    21 (RSRQ, not used by default, needs to open the dual-measurement

    switch). Click Modify Area > Managed Element > Radio Parameter > LTE

    FDD > Measurement Parameter Configuration > UE E-UTRAN

    Measurement to find the tables whose Measurement Configuration Index

    are 20 and 21. See Figure 4-16 and Figure 4-17.

  • ZTE LTE FDD Handover Feature Guide

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    Figure 4-16 Event Index Related to Measurement Events

    Figure 4-17 Parameter Configuration of Measurement Index

    4.3.4 Deactivate Feature

    Click Modify Area > Managed Element > Radio Parameter > LTE FDD >

    Neighbor Relation Configuration > E-UTRAN Neighbor Relation, and set

    Switch for HO to No(0) for all handover deactivation, see Figure 4-18.

  • ZTE LTE FDD Handover Feature Guide

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    Figure 4-18 Deactivating Handover

    4.3.5 Data Save and Synchronization

    1After modified the parameters, click to save all the data.

    2Select [Configuration Management->Data Synchronization] from the

    main menu of the Configuration Management tab. The Data

    Synchronization dialog box opens. First select NE, then select

    synchronization mode as Incremental synchronization, then click

    Synchronize button.

    5 Related Counters, KPI and Alarms

    5.1 Related Counters

    Table 5-1 Related Counters

    SN Counter No. Description

    1 C373600000

    Number of Successful Outgoing Intra-eNB

    Intra-freq Handover Preparation

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    SN Counter No. Description

    2 C373600001 Number of Outgoing Intra-eNB Intra-freq

    Handover Preparation Failure due to

    Re-estabilshment to Source Cell

    3 C373600002 Number of Outgoing Intra-eNB Intra-freq

    Handover Preparation Failure due to Dest

    Preparation Failure

    4 C373600003 Number of Outgoing Intra-eNB Intra-freq

    Handover Preparation Failure due to Other

    Reason

    5 C373600040 Number of Successful Incoming Intra-eNB

    Intra-freq Handover Preparation

    6 C373600041 Number of Incoming Intra-eNB Intra-freq

    Handover Preparation Failure due to

    Resource Allocation Fail

    7 C373600042 Number of Incoming Intra-eNB Intra-freq

    Handover Preparation Failure due to Dest

    Occur Reestblishment

    8 C373600043 Number of Incoming Intra-eNB Intra-freq

    Handover Preparation Failure due to Other

    Reason

    9 C373600080 Number of Successful Outgoing Intra-eNB

    Intra-freq Handover Execution

    10 C373600081 Number of Outgoing Intra-eNB Intra-freq

    Handover Execution Failure due to

    Re-estabilshment to Source Cell

    11 C373600082 Number of Outgoing Intra-eNB Intra-freq

    Handover Execution Failure due to Dest

    Occur Reestblishment

    12 C373600083 Number of Outgoing Intra-eNB Intra-freq

    Handover Execution Failure due to Other

    Cause

    13 C373600084 Number of Successful Incoming Intra-eNB

    Intra-freq Handover Execution

    14 C373600085 Number of Incoming Intra-eNB Intra-freq

    Handover Execution Failure due to RRC

    Reconfig Complete Timeout

    15 C373600086 Number of Incoming Intra-eNB Intra-freq

    Handover Execution Failure due to Dest

    Occur Reestblishment

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    SN Counter No. Description

    16 C373600087 Number of Incoming Intra-eNB Intra-freq

    Handover Execution Failure due to Other

    Cause

    17 C373600088 Number of Outgoing Intra-eNB Intra-freq

    Handover Preparation Failure due to User

    Inactivity

    18 C373600089 Number of Outgoing Intra-eNB Intra-freq

    Handover Execution Failure due to Waiting

    Reconfiguration Complete timeout

    19 C373610300 Number of Successful Outgoing

    Inter-eNB(via X2) Intra-freq Handover

    Preparation

    20 C373610301 Number of Outgoing Inter-eNB(via X2)

    Intra-freq Handover Preparation Failure due

    to HO Request ACK Timeout

    21 C373610302 Number of Outgoing Inter-eNB(via X2)

    Intra-freq Handover Preparation Failure due

    to Dest Preparation Failure

    22 C373610303 Number of Outgoing Inter-eNB(via X2)

    Intra-freq Handover Preparation Failure due

    to Other Reason

    23 C373610304 Number of Outgoing Inter-eNB(via X2)

    Intra-freq Handover Preparation Failure due

    to Re-estabilshment to Source Cell

    24 C373610340 Number of Successful Incoming

    Inter-eNB(via X2) Intra-freq Handover

    Preparation

    25 C373610341 Number of Incoming Inter-eNB(via X2)

    Intra-freq Handover Preparation Failure due

    to Resource Allocation Fail

    26 C373610342 Number of Incoming Inter-eNB(via X2)

    Intra-freq Handover Preparation Failure due

    to Source Cancle HO

    27 C373610343 Number of Incoming Inter-eNB(via X2)

    Intra-freq Handover Preparation Failure due

    to Other Reason

    28 C373610380 Number of Successful Outgoing

    Inter-eNB(via X2) Intra-freq Handover

    Execution

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    SN Counter No. Description

    29 C373610381 Number of Outgoing Inter-eNB(via X2)

    Intra-freq Handover Execution Failure due

    to Re-estabilshment to Source Cell

    30 C373610382 Number of Outgoing Inter-eNB(via X2)

    Intra-freq Handover Execution Failure due

    to UE Context Release Timeout

    31 C373610383 Number of Outgoing Inter-eNB(via X2)

    Intra-freq Handover Execution Failure due

    to Other Cause

    32 C373610384 Number of Successful Incoming

    Inter-eNB(via X2) Intra-freq Handover

    Execution

    33 C373610385 Number of Incoming Inter-eNB(via X2)

    Intra-freq Handover Execution Failure due

    to RRC Reconfig Complete Timeout

    34 C373610386 Number of Incoming Inter-eNB(via X2)

    Intra-freq Handover Execution Failure due

    to Path Switch Failure

    35 C373610387 Number of Incoming Inter-eNB(via X2)

    Intra-freq Handover Execution Failure due

    to Other Cause

    36 C373610388 Number of Incoming Inter-eNB(via X2)

    Intra-freq Handover Execution Failure due

    to Source Cancel HO

    37 C373610389 Number of Outgoing Inter-eNB(via X2)

    Intra-freq Handover Preparation Failure due

    to User Inactivity

    38 C373610390 Number of Incoming Inter-eNB(via X2)

    Intra-freq Handover Preparation Failure due

    to Re-estabilshment to Target Cell

    39 C373610391 Number of Incoming Inter-eNB(via X2)

    Intra-freq Handover Execution Failure due

    to Re-estabilshment to Target Cell

    40 C373610392 Number of Outgoing Inter-eNB(via X2)

    Intra-freq Handover Preparation Request

    41 C373620600 Number of Successful Outgoing

    Inter-eNB(via S1) Intra-freq Handover

    Preparation

    42 C373620601 Number of Outgoing Inter-eNB(via S1)

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    SN Counter No. Description

    Intra-freq Handover Preparation Failure due

    to HO Command Timeout

    43 C373620602 Number of Outgoing Inter-eNB(via S1)

    Intra-freq Handover Preparation Failure due

    to Dest Preparation Failure

    44 C373620603 Number of Outgoing Inter-eNB(via S1)

    Intra-freq Handover Preparation Failure due

    to Other Reason

    45 C373620604 Number of Outgoing Inter-eNB(via S1)

    Intra-freq Handover Preparation Failure due

    to Re-estabilshment to Source Cell

    46 C373620640 Number of Successful Incoming

    Inter-eNB(via S1) Intra-freq Handover

    Preparation

    47 C373620641 Number of Incoming Inter-eNB(via S1)

    Intra-freq Handover Preparation Failure due

    to Resource Allocation Fail

    48

    C373620642

    Number of Incoming Inter-eNB(via S1)

    Intra-freq Handover Preparation Failure due

    to Source Cancel HO

    49

    C373620643

    Number of Incoming Inter-eNB(via S1)

    Intra-freq Handover Preparation Failure due

    to Other Reason

    50

    C373620680

    Number of Successful Outgoing

    Inter-eNB(via S1) Intra-freq Handover

    Execution

    51

    C373620681

    Number of Outgoing Inter-eNB(via S1)

    Intra-freq Handover Execution Failure due

    to Re-estabilshment to Source Cell

    52

    C373620682

    Number of Outgoing Inter-eNB(via S1)

    Intra-freq Handover Execution Failure due

    to UE Context Release Timeout

    53

    C373620683

    Number of Outgoing Inter-eNB(via S1)

    Intra-freq Handover Execution Failure due

    to Other Cause

    54

    C373620684

    Number of Successful Incoming

    Inter-eNB(via S1) Intra-freq Handover

    Execution

    55 C373620685 Number of Incoming Inter-eNB(via S1)

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    SN Counter No. Description

    Intra-freq Handover Execution Failure due

    to RRC Reconfig Complete Timeout

    56

    C373620686

    Number of Incoming Inter-eNB(via S1)

    Intra-freq Handover Execution Failure due

    to Source Cancel HO

    57

    C373620687

    Number of Incoming Inter-eNB(via S1)

    Intra-freq Handover Execution Failure due

    to Other Cause

    58

    C373620688

    Number of Outgoing Inter-eNB(via S1)

    Intra-freq Handover Preparation Failure due

    to User Inactivity

    59

    C373620689

    Number of Incoming Inter-eNB(via S1)

    Intra-freq Handover Preparation Failure due

    to Re-estabilshment to Target Cell

    60

    C373620690

    Number of Incoming Inter-eNB(via S1)

    Intra-freq Handover Execution Failure due

    to Re-estabilshment to Target Cell

    61 C373620691

    Number of Outgoing Inter-eNB(via S1)

    Intra-freq Handover Preparation Request

    62 C373630900

    Number of Successful Outgoing Intra-eNB

    Inter-freq Handover Preparation

    63

    C373630901

    Number of Outgoing Intra-eNB Inter-freq

    Handover Preparation Failure due to

    Re-estabilshment to Source Cell

    64

    C373630902

    Number of Outgoing Intra-eNB Inter-freq

    Handover Preparation Failure due to Dest

    Preparation Failure

    65

    C373630903

    Number of Outgoing Intra-eNB Inter-freq

    Handover Preparation Failure due to Other

    Reason

    66 C373630940

    Number of Successful Incoming Intra-eNB

    Inter-freq Handover Preparation

    67

    C373630941

    Number of Incoming Intra-eNB Inter-freq

    Handover Preparation Failure due to

    Resource Allocation Fail

    68

    C373630942

    Number of Incoming Intra-eNB Inter-freq

    Handover Preparation Failure due to Dst

    occur Re-establishment

    69 C373630943 Number of Incoming Intra-eNB Inter-freq

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    SN Counter No. Description

    Handover Preparation Failure due to Other

    Reason

    70 C373630980

    Number of Successful Outgoing Intra-eNB

    Inter-freq Handover Execution

    71

    C373630981

    Number of Outgoing Intra-eNB Inter-freq

    Handover Execution Failure due to

    Re-estabilshment to Source Cell

    72

    C373630982

    Number of Outgoing Intra-eNB Inter-freq

    Handover Execution Failure due to Dst

    occur Re-establishment

    73

    C373630983

    Number of Outgoing Intra-eNB Inter-freq

    Handover Execution Failure due to Other

    Cause

    74 C373630984

    Number of Successful Incoming Intra-eNB

    Inter-freq Handover Execution

    75

    C373630985

    Number of Incoming Intra-eNB Inter-freq

    Handover Execution Failure due to RRC

    Reconfig Complete Timeout

    76

    C373630986

    Number of Incoming Intra-eNB Inter-freq

    Handover Execution Failure due to Dst

    occur Re-establishment

    77

    C373630987

    Number of Incoming Intra-eNB Inter-freq

    Handover Execution Failure due to Other

    Cause

    78

    C373630988

    Number of Outgoing Intra-eNB Inter-freq

    Handover Preparation Failure due to User

    Inactivity

    79

    C373630989

    Number of Outgoing Intra-eNB Inter-freq

    Handover Execution Failure due to Waiting

    Reconfiguration Complete Timeout

    80

    C373641200

    Number of Successful Outgoing

    Inter-eNB(via X2) Inter-freq Handover

    Preparation

    81

    C373641201

    Number of Outgoing Inter-eNB(via X2)

    Inter-freq Handover Preparation Failure due

    to HO Request ACK Timeout

    82

    C373641202

    Number of Outgoing Inter-eNB(via X2)

    Inter-freq Handover Preparation Failure due

    to Dest Preparation Failure

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    SN Counter No. Description

    83

    C373641203

    Number of Outgoing Inter-eNB(via X2)

    Inter-freq Handover Preparation Failure due

    to Other Reason

    84

    C373641204

    Number of Outgoing Inter-eNB(via X2)

    Inter-freq Handover Preparation Failure due

    to Re-estabilshment to Source Cell

    85

    C373641240

    Number of Successful Incoming

    Inter-eNB(via X2) Inter-freq Handover

    Preparation

    86

    C373641241

    Number of Incoming Inter-eNB(via X2)

    Inter-freq Handover Preparation Failure due

    to Resource Allocation Fail

    87

    C373641242

    Number of Incoming Inter-eNB(via X2)

    Inter-freq Handover Preparation Failure due

    to Source Cancel HO

    88

    C373641243

    Number of Incoming Inter-eNB(via X2)

    Inter-freq Handover Preparation Failure due

    to Other Reason

    89

    C373641280

    Number of Successful Outgoing

    Inter-eNB(via X2) Inter-freq Handover

    Execution

    90

    C373641281

    Number of Outgoing Inter-eNB(via X2)

    Inter-freq Handover Execution Failure due

    to Re-estabilshment to Source Cell

    91

    C373641282

    Number of Outgoing Inter-eNB(via X2)

    Inter-freq Handover Execution Failure due

    to UE Context Release Timeout

    92

    C373641283

    Number of Outgoing Inter-eNB(via X2)

    Inter-freq Handover Execution Failure due

    to Other Cause

    93

    C373641284

    Number of Successful Incoming

    Inter-eNB(via X2) Inter-freq Handover

    Execution

    94

    C373641285

    Number of Incoming Inter-eNB(via X2)

    Inter-freq Handover Execution Failure due

    to RRC Reconfig Complete Timeout

    95

    C373641286

    Number of Incoming Inter-eNB(via X2)

    Inter-freq Handover Execution Failure due

    to Path Switch Failure

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    SN Counter No. Description

    96

    C373641287

    Number of Incoming Inter-eNB(via X2)

    Inter-freq Handover Execution Failure due

    to Other Cause

    97

    C373641288

    Number of Incoming Inter-eNB(via X2)

    Inter-freq Handover Execution Failure due

    to Source Cancel HO

    98

    C373641289

    Number of Outgoing Inter-eNB(via X2)

    Inter-freq Handover Preparation Failure due

    to User Inactivity

    99

    C373641290

    Number of Incoming Inter-eNB(via X2)

    Inter-freq Handover Preparation Failure due

    to Re-estabilshment to Target Cell

    100

    C373641291

    Number of Incoming Inter-eNB(via X2)

    Inter-freq Handover Execution Failure due

    to Re-estabilshment to Target Cell

    101 C373641292

    Number of Outgoing Inter-eNB(via X2)

    Inter-freq Handover Preparation Request

    102

    C373651500

    Number of Successful Outgoing

    Inter-eNB(via S1) Inter-freq Handover

    Preparation

    103

    C373651501

    Number of Outgoing Inter-eNB(via S1)

    Inter-freq Handover Preparation Failure due

    to HO Command Timeout

    104

    C373651502

    Number of Outgoing Inter-eNB(via S1)

    Inter-freq Handover Preparation Failure due

    to Dst Preparation Failure

    105

    C373651503

    Number of Outgoing Inter-eNB(via S1)

    Inter-freq Handover Preparation Failure due

    to Other Reason

    106

    C373651504

    Number of Outgoing Inter-eNB(via S1)

    Inter-freq Handover Preparation Failure due

    to Re-estabilshment to Source Cell

    107

    C373651540

    Number of Successful Incoming

    Inter-eNB(via S1) Inter-freq Handover

    Preparation

    108

    C373651541

    Number of Incoming Inter-eNB(via S1)

    Inter-freq Handover Preparation Failure due

    to Resource Allocation Fail

    109 C373651542 Number of Incoming Inter-eNB(via S1)

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    SN Counter No. Description

    Inter-freq Handover Preparation Failure due

    to Source Cancel HO

    110

    C373651543

    Number of Incoming Inter-eNB(via S1)

    Inter-freq Handover Preparation Failure due

    to Other Reason

    111

    C373651580

    Number of Successful Outgoing

    Inter-eNB(via S1) Inter-freq Handover

    Execution

    112

    C373651581

    Number of Outgoing Inter-eNB(via S1)

    Inter-freq Handover Execution Failure due

    to Re-estabilshment to Source Cell

    113

    C373651582

    Number of Outgoing Inter-eNB(via S1)

    Inter-freq Handover Execution Failure due

    to UE Context Release Timeout

    114

    C373651583

    Number of Outgoing Inter-eNB(via S1)

    Inter-freq Handover Execution Failure due

    to Other Cause

    115

    C373651584

    Number of Successful Incoming

    Inter-eNB(via S1) Inter-freq Handover

    Execution

    116

    C373651585

    Number of Incoming Inter-eNB(via S1)

    Inter-freq Handover Execution Failure due

    to RRC Reconfig Complete Timeout

    117

    C373651586

    Number of Incoming Inter-eNB(via S1)

    Inter-freq Handover Execution Failure due

    to Source Cancel HO

    118

    C373651587

    Number of Incoming Inter-eNB(via S1)

    Inter-freq Handover Execution Failure due

    to Other Cause

    119

    C373651588

    Number of Outgoing Inter-eNB(via S1)

    Inter-freq Handover Preparation Failure due

    to User Inactivity

    120

    C373651589

    Number of Incoming Inter-eNB(via S1)

    Inter-freq Handover Preparation Failure due

    to Re-estabilshment to Target Cell

    121

    C373651590

    Number of Incoming Inter-eNB(via S1)

    Inter-freq Handover Execution Failure due

    to Re-estabilshment to Target Cell

    122 C373651591 Number of Outgoing Inter-eNB(via S1)

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    SN Counter No. Description

    Inter-freq Handover Preparation Request

    5.2 Related KPI

    Table 5-2 Related KPI

    SN KPI No. Description

    1

    340031

    Number of Outgoing Intra-RAT Intra-freq

    Handover Preparation

    Failure(Re-estabilshment to Source Cell)

    2

    340032

    Number of Outgoing Intra-RAT Intra-freq

    Handover Preparation Failure(Dest

    Preparation Failure)

    3

    340033

    Number of Outgoing Intra-RAT Intra-freq

    Handover Preparation Failure(User

    Inactivity)

    4

    340034

    Number of Outgoing Intra-RAT Intra-freq

    Handover Preparation Failure(HO Request

    Ack Timeout)

    5

    340035

    Number of Outgoing Intra-RAT Intra-freq

    Handover Preparation Failure(Other

    Reason)

    6 340040

    Number of Successful Incoming Intra-RAT

    Intra-freq Handovers Preparation

    7

    340041

    Number of Incoming Intra-RAT Intra-freq

    Handover Preparation Failure(Resource

    Allocation Fail)

    8

    340042

    Number of Incoming Intra-RAT Intra-freq

    Handover Preparation Failure(Dest Occur

    Reestblishment)

    9

    340043

    Number of Incoming Intra-RAT Intra-freq

    Handover Preparation Failure(Source

    Cancle HO)

    10

    340044

    Number of Incoming Intra-RAT Intra-freq

    Handover Preparation Failure(Other

    Reason)

    11 340046

    Number of Successful Incoming Intra-RAT

    Intra-freq Handovers Execution

    12 340047

    Number of Outgoing Intra-RAT Inter-freq

    Handover Preparation

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    SN KPI No. Description

    Failure(Re-estabilshment to Source Cell)

    13

    340048

    Number of Outgoing Intra-RAT Inter-freq

    Handover Preparation Failure(Dest

    Preparation Failure)

    14

    340049

    Number of Outgoing Intra-RAT Inter-freq

    Handover Preparation Failure(User

    Inactivity)

    15

    340050

    Number of Outgoing Intra-RAT Inter-freq

    Handover Preparation Failure(HO Request

    Ack Timeout)

    16

    340051

    Number of Outgoing Intra-RAT Inter-freq

    Handover Preparation Failure(Other

    Reason)

    17 340053

    Number of Successful Incoming Intra-RAT

    Inter-freq Handovers Preparation

    18

    340054

    Number of Incoming Intra-RAT Inter-freq

    Handover Preparation Failure(Resource

    Allocation Fail)

    19

    340055

    Number of Incoming Intra-RAT Inter-freq

    Handover Preparation Failure(Dest Occur

    Reestblishment)

    20

    340056

    Number of Incoming Intra-RAT Inter-freq

    Handover Preparation Failure(Source

    Cancle HO)

    21

    340057

    Number of Incoming Intra-RAT Inter-freq

    Handover Preparation Failure(Other

    Reason)

    22 340059

    Number of Successful Incoming Intra-RAT

    Inter-freq Handovers Execution

    23 340060

    Success Rate of Intra-RAT Intra-freq Cell

    Incoming Handover

    24 340061

    Success Rate of Intra-RAT Inter-freq Cell

    Incoming Handover

    5.3 Related Alarms

    No.

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    6 Abbreviations

    1xRRT CDMA2000 1x Radio Transmission Technology

    3GPP 3rd Generation Partnership Project

    BCCH Broadcast Control Channel

    CCO Cell Change Order

    CDMA2000 Code Division Multiple Access 2000

    CIO Cell Individual Offset

    CS Circuit-Switched

    CSG Closed Subscriber Group

    DL Downlink

    DRX Discontinuous Reception

    eNodeB E-UTRAN NodeB

    EPLMN Equivalent PLMN

    E-UTRAN Evolved Universal Terrestrial Radio Access Network

    FDD Frequency Division Duplex

    GERAN GSM EDGE Radio Access Network

    GSM Global System for Mobile Communications

    HRPD High Rate Packet Data

    HPLMN Home PLMN

    ID Identity

    IMSI International Mobile Subscriber Identity

    LTE Long-Term Evolution

    MIB Master Information Block

    MME Mobility Management Entity

    NAS Non Access Stratum

    PS HO Packet-switched handover

    PLMN Public Land Mobile Network

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    RAT Radio Access Technology

    RSRP Reference Signal Received Power

    RSRQ Reference Signal Received Quality

    SGW Serving GateWay

    SIB System Information Block

    SIM Subscriber Identity Module

    SRVCC Single Radio Voice Call Continuity

    TA Timing Advance

    TA Tracking Area

    USIM Universal Subscriber Identity Module

    UE User Equipment

    UTRAN Universal Terrestrial Radio Access Network

    UL Uplink

    VPLMN Visited PLMN

    1 Introduction1.1 Scope1.2 Target Group1.3 Feature Attribute1.4 Correlation with Other Feature

    2 Terminology2.1 Specification Notations

    3 Technical Descriptions3.1 Feature Descriptions3.2 Technical Details3.2.1 Measurement Configuration3.2.2 Measurement Decision for Intra-Frequency Handover3.2.3 Measurement Decision for Inter-Frequency Handover3.2.4 Handover Decision from LTE to UTRAN3.2.5 Handover Decision from LTE to GERAN3.2.6 CSFB from LTE to Other RATs3.2.7 Intra-Site Handover3.2.8 X2 Handover3.2.9 Intra-RAT S1 Handover3.2.10 Inter-RAT Handover3.2.11 Redirection

    4 Key Parameter Configuration4.1 Parameter List4.2 Parameter Configuration Rule4.3 Parameter Configuration Procedure4.3.1 Pre-Defined Parameters Configuration4.3.2 Activate Feature4.3.2.1 Intra-Site Handover Activation4.3.2.2 S1 and X2 Handover Activation4.3.2.3 Inter-RAT Handover Activation4.3.2.4 Inter-RAT Redirection Activation

    4.3.3 Other Parameter Configuration Procedure4.3.4 Deactivate Feature4.3.5 Data Save and Synchronization

    5 Related Counters, KPI and Alarms5.1 Related Counters5.2 Related KPI5.3 Related Alarms

    6 Abbreviations