Leliwa Technical Bulletin

LTE measurement events

events

Date:
Date: 12.03.2010
Revision: 001/LME/010

Copyright ©2010 Leliwa. All Rights Reserved.

Author: Jakub Bluszcz

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Leliwa Technical Bulletin LTE measurement
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Table of contents

Table of contents ............................................................................................................................................................................2

Parameter s-measure .....................................................................................................................................................................3
Event A1 .........................................................................................................................................................................................4
Event A2 .........................................................................................................................................................................................5
Event A3 .........................................................................................................................................................................................6
Event A4 .........................................................................................................................................................................................7
Event A5 .........................................................................................................................................................................................8
Event B1 .........................................................................................................................................................................................9
Event B2 .......................................................................................................................................................................................10
Speed dependant scaling of measurement parameters ................................................................................................................11
Acronyms and Abbreviations ........................................................................................................................................................12
References ...................................................................................................................................................................................13
Disclaimer.....................................................................................................................................................................................14

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Leliwa Technical Bulletin LTE measurement
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Parameter s-
s-measure

RSRP s-cell

s-measure

MEASUREMENTS time

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Leliwa Technical Bulletin LTE measurement
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Event A1

Serving becomes better than threshold

triggerQuantity

Hysteresis a1-Threshold

reportAmount

reportQuantity
time

reportInterval
timeToTrigger

reportOnLeave
triggerType=event
eventId=eventA1

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Event A2

Serving becomes worse than threshold

triggerQuantity

a2-Threshold
Hysteresis

reportQuantity reportAmount

time

reportInterval
timeToTrigger

reportOnLeave
triggerType=event
eventId=eventA2

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Event A3

Neighbour becomes offset better than serving

Hysteresis
triggerQuantity

offset
s-cell

n-cell

reportQuantity reportAmount

time

triggerType=event reportOnLeave
eventId=eventA3 timeToTrigger reportInterval

Offset = a3-offset + offsetFreqs + cellIndividualOffsets – offsetFreqn - cellIndividualOffsetn

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Event A4

Neighbour becomes offset better than threshold

triggerQuantity

Hysteresis

offset

reportAmount a4-Threshold

reportQuantity
time
reportOnLeave
triggerType=event
timeToTrigger reportInterval
eventId=eventA4

Offset = offsetFreqn + cellIndividualOffsetn

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Event A5

Serving becomes worse than thr.1 and neighbour becomes better than thr.2
condition 2 fulfilled
triggerQuantity

condition 1 fulfilled
a5-Threshold2

Hysteresis offset

s-cell
a5-Threshold1

Hysteresis n-cell
reportAmount

reportQuantity time

triggerType=event reportOnLeave
eventId=eventA5 timeToTrigger reportInterval
offset = offsetFreqn + cellIndividualOffsetn

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Event B1

Inter RAT neighbour becomes better than threshold

utra-RSCP/utraEcN0
RSSI(RXLEV)

Hysteresis

OffsetFreq

reportAmount a1-ThresholdUTRA/GERAN

reportQuantity
time
reportOnLeave
triggerType=event
timeToTrigger reportInterval
eventId=eventB1

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Event B2

Serving becomes worse than threshold1 and inter RAT neighbour becomes better
than threshold2)
condition 2 fulfilled
condition 1 fulfilled
utra-RSCP/utraEcN0

triggerQuantity

b2-Threshold2UTRA/GERAN
RSSI(RXLEV)

Hysteresis OffsetFreq

s-cell
b2-Threshold1

Hysteresis n-cell
reportAmount

reportQuantity time

triggerType=event reportOnLeave
eventId=eventB2 timeToTrigger reportInterval

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Speed dependant scaling of measurement parameters

triggerQuantity

time

timeToTrigger

timeToTriger:=timeToTrigger*sf-Medium (medium-mobility detected)

timeToTriger:=timeToTrigger*sf-High (high-mobility detected)

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Acronyms and Abbreviations

AKA Authentication and Key Agreement

CCO Cell Change Order
CDMA Code Division Multiple Access
DCCH Dedicated Control Channel
DL Downlink
EGPRS Enhanced General Packet Radio Service
GERAN GSM/EDGE Radio Access Network
HO Handover
MME Mobility Management Entity
NAS Non-access Stratum Signalling
PCCH Paging Control Channel
PLMN Public Land Mobile Network
PSI Public Service Identity
RAT Radio Access Technology
RLC Radio Link Control
RNTI Radio Network Temporary Identifier
RRC Radio Resource Control
RSCP Received Signal Code Power
RSRP Reference Signal Received Power
RXLEV Received Signal Level
TMSI Temporary Mobile Subscriber Identity Number
UE User Equipment
UL Uplink
UTRAN UMTS Terrestrial Radio Access Network

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References

This section contains the locations of various specifications, document references and useful information where you can learn more about
this subject.

[1] 3GPP TS 36.331 Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Resource Control (RRC); Protocol specification

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Disclaimer
This document is based on Leliwa training materials.

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document.

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