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    3GPP TR 36.839 V11.0.0 (2012-09)Technical Report

    3rd Generation Partnership Project;Technical Specification Group Radio Access Network;Evolved Universal Terrestrial Radio Access (E-UTRA);

    Mobility enhancements in heterogeneous networks(Release 11)

    The present document has been developed within the 3rd Generation Partnership Project (3GPP TM) and may be further elaborated for the purposes of 3GPP.The present document has not been subject to any approval process by the 3GPP Organizational Partners and shall not be implemented.This Report is provided for future development work within 3GPPonly. The Organizational Partners accept no liability for any use of this Specification.Specifications and Reports for implementation of the 3GPP TM system should be obtained via the 3GPP Organizational Partners' Publications Offices.

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    3GPP

    3GPP TR 36.839 V11.0.0 (2012-09)2Release 11

    Keywords

    3GPP

    Postal address

    3GPP support office address650 Route des Lucioles - Sophia Antipolis

    Valbonne - FRANCE

    Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16

    Internethttp://www.3gpp.org

    Copyright Notification

    No part may be reproduced except as authorized by written permission.The copyright and the foregoing restriction extend to reproduction in all media.

    2012, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC).All rights reserved.

    UMTS is a Trade Mark of ETSI registered for the benefit of its members3GPP is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational PartnersLTE is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational PartnersGSM and the GSM logo are registered and owned by the GSM Association

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    3GPP

    3GPP TR 36.839 V11.0.0 (2012-09)3Release 11

    Contents

    Foreword............................................................................................................................................................. 4

    1 Scope ........................................................................................................................................................ 5

    2 References ................................................................................................................................................ 5

    3 Definitions, symbols and abbreviations ....................................... ........................ ........................... ......... 63.1 Definitions ......................................................................................................................................................... 63.2 Symbols ............................................................................................................................................................. 63.3 Abbreviations ..................................................................................................................................................... 7

    4 General ..................................................................................................................................................... 7

    5 HetNet mobility performance evaluation ........................ ........................... ........................ ...................... 75.1 Simulation study phases ..................................................................................................................................... 7 5.2 General Simulation assumptions ........................................................................................................................ 8 5.2.1 Handover Failure Modelling ........................................................................................................................ 85.2.1.1 Definition of Handover states ................................................................................................................. 85.2.1.2 RLF modelling and definition of RLF states .......................................................................................... 85.2.1.3 Handover/PDCCH failure modelling ..................................................................................................... 85.2.2 Ping-pong Modelling.................................................................................................................................. 115.2.3 Typical Radio Parameter Configurations ................................................................................................... 125.2.4 HetNet mobility specific parameters .......................................................................................................... 135.2.5 Modelling of additional features ................................................................................................................ 145.3 Specific assumptions for Hotspot simulation ................................................................................................... 145.3.1 UE Placement and Trajectories for hotspot simulation .............................................................................. 145.3.2 Additional Simulation assumptions for Hotspot calibration ...................................................................... 155.4 Additional assumptions for large area system simulations .............................................................................. 155.4.1 Improved HO failure and RLF modelling .................................................................................................. 155.4.2 Handover performance metrics for HetNet large area evaluation .............................................................. 16

    5.4.3 The Definition of Short-ToS Rate .............................................................................................................. 175.4.4 UE Placement and Trajectories and cell placement for large area simulation ........................................... 175.4.5 Additional Simulation assumptions for Large area calibration .................................................................. 185.4.5.1 UE Placement and Trajectories and cell placement for large area simulation calibration .................... 185.5 Simulation results ............................................................................................................................................ 195.5.1 Hotspot calibration ..................................................................................................................................... 195.5.1.1 RLF results discussion .......................................................................................................................... 195.5.1.2 HO failures results discussion .............................................................................................................. 215.5.1.3 Ping-pong results discussion ................................................................................................................ 235.5.2 Large area calibration ................................................................................................................................. 235.5.2.1 RLF performance for HetNet and legacy systems ................................................................................ 245.5.2.2 Handover failure performance for HetNet and legacy systems ............................................................ 255.5.2.3 Short Time of Stay performance........................................................................................................... 265.5.3 Overall observations from calibration simulations ..................................................................................... 285.5.4 Multiple picocell deployments ................................................................................................................... 285.5.4.1 Multiple picocell deployment under full system load ........................................................................... 285.5.4.1.1 Observations from Multiple picocell deployment simulations under full system load ................... 305.5.4.2 Multiple picocell deployment under constant system load ................................................................... 305.5.4.2.1 Observations from Multiple picocell deployment simulations under constant system load ........... 305.5.5 Performance with DRX .............................................................................................................................. 305.5.5.1 Simulation study for Handover and RLF performance with DRX for HetNet relative to macro

    only systems ......................................................................................................................................... 305.5.5.1.1 Simulation assumptions and definitions .......................................................................................... 305.5.5.1.2 Simulation results with DRX for HetNet relative to macro only systems ...................................... 315.5.5.2 Simulation study for Handover and RLF performance with DRX for different HO types in

    HetNet .................................................................................................................................................. 335.5.5.2.1 Simulation assumptions and definitions .......................................................................................... 335.5.5.2.2 Simulation results with DRX for different HO types in HetNet ........................................................... 365.5.5.3 Overall observations on Handover performance in HetNet with DRX ................................................ 38

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