lte ho strategy1

5/23/2018 LTE HO Strategy1

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LTE HO StrategyFeatures

KPIs


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LTE HO Strategy


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BTS

LTE Idle Mode Camp ing

LTE

RSRP = -140dBm

RSRQ = -33dB

f1/f2/f3

BTS

f1/f2/f3

Two main parameters for camping: qRxLevMin (RSRP) = -140dBm

qQualMin (RSRQ) = -33dB


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Cell Selectio n/Reselectio n and PLMN Selectio n


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Int ra LTE HO Interfaces Invo lved In Intr a-LTE HO

Three types of Intra-LTE HO: Intra-RBS

X2 Inter-RBS

S1 Inter-RBS


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Int ra LTE HO Interfaces Invo lved In Intr a-LTE HO

No need to define Intra frequency neighbors: By default, UE in the LTE network detects suitable neighbor cells, without the

assistance of a list of neighbor cells sent by the serving RBS.

=0=3dB =1dB

= RSRP

= Both

=40ms

=0

=480ms


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Int ra LTE HO Related Featu res


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Inter RAT LTE Mobil i ty To WCDMA Concept

In order to allow LTE to WCDMA mobility the following featureshould be activated in the eNB:

Coverage-Triggered WCDMA Session Continuity


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Int er RAT LTE Cell Reselec tio n To WCDMA Idle Mode

By activating the feature Coverage-Triggered WCDMA Session Continuity thecreation and transmission of SIB6in the eNB is enabled.

SIB6 contains information and parameters required by the UE toperform idle mode reselection to the WCDMA network.

No need to define specific WCDMA cells Neighbor List.

The following information is provided in SIB6: arfcnValueUtranDl

cellReselectionPriority

threshXHigh

threshXLow

tReselectionUtra

tReselectionU traSfM edium

tReselectionU traSfH igh

BTS

LTE

f1/f2/f3

BTS

f1/f2/f3

SIB6


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=-120dBm

=-20dB

=1dB

= Both

=640ms

=480ms

= RSRP

=0

Inter RAT LTE Sessio n Con tinu ity To WCDMA Conn . Mode

Poor coverage evaluation process using primary threshold:


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Poor coverage evaluation process using primary threshold:


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Poor coverage UE handling


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WCDMA To LTE Cell Reselectio n Idle Mode

In order to allow WCDMA to LTE cell reselection (idle mode) thefollowing feature should be activated in the RNC:

LTE Cell Reselection (FAJ 121 1474) - eutran detection, EutranFreqRelationMO parameters.

By activating the feature creation and transmission of SIB19in theWCDMA nodeB is enabled.

SIB19contains information and parameters required by the UE toperform idle mode reselection to the LTE network.

No need to define specific LTE cells Neighbor List and no need toreconsider WCDMA already existing neighbors.

Cell reselection to LTE is supported by E-UTRA capable UEs in IdleMode and in URA_PCH.

The following information is provided in SIB19:

LTE DL EARFCN (Max 8) cellReselectionPriority

More

BTS

LTE

f1/f2/f3

BTS

f1/f2/f3


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SIBs Schedu l ing Change to Con tain SIB19

Recommended tobe changed


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WCDMA To LTE Release With Re-Direct Connected Mode

In order to allow WCDMA to LTE release with redirection in connectedmode, the following feature should be activated in the RNC:

Release with Redirect to LTE (FAJ 121 2174) releaseRedirect Parameter. Release with Redirect to LTE (FAJ 121 2174) is a complement to LTE

Cell Reselection.

It ensures mobility to LTE for an active UE that spends little time inIdle Mode or in state URA_PCH where LTE Cell Reselection can beperformed.

It is a blind redirection, fast and without compressed mode.There is no pre-allocation of resources in the target LTE system.

Release with Redirect to LTE is not supported when the best cell islocated in DRNC.

BTS

LTE

f1/f2/f3

BTS

f1/f2/f3

If UE State: Idle

Ura (FD) Then - > RRC Connection

Release with redirectioninformation (e-Utra Freq)


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Features


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KPIs


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LTE Ini tial Selected KPIs


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LTE DL Resource Grid With 5M BW


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lte ho strategy1

Documents

lte network

33db5232018 lte ho strategy1

rbs5232018 lte ho strategy1

480ms5232018 lte ho

lte cell reselection

wcdma idle mode

rat lte cell reselec

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