lte measurement events

Leliwa Technical Bulletin

Date: Date:

12.03.2010

Revision:

001/LME/010

Author:

Jakub Bluszcz

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Copyright ©2010 Leliwa. All Rights Reserved.

LTE measurement events events


LTE measurement measurement events

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

2



RSRP s-cell

Parameter ss-measure

s-measure

MEASUREMENTS

time

3



Event A1

triggerQuantity

Serving becomes better than threshold

Hysteresis

a1-Threshold reportAmount

reportQuantity reportOnLeave

reportInterval

timeToTrigger

triggerType=event eventId=eventA1

time

4



Event A2

triggerQuantity

Serving becomes worse than threshold

a2-Threshold Hysteresis reportAmount

reportQuantity

reportOnLeave

reportInterval


timeToTrigger

time

5



Event A3

triggerQuantity

Neighbour becomes offset better than serving Hysteresis

offset s-cell n-cell reportAmount

reportQuantity

time triggerType=event eventId=eventA3

reportOnLeave timeToTrigger

reportInterval

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

6



Event A4

triggerQuantity

Neighbour becomes offset better than threshold

Hysteresis

offset a4-Threshold

reportAmount reportQuantity

time reportOnLeave


timeToTrigger

reportInterval

Offset = offsetFreqn + cellIndividualOffsetn

7



Event A5 Serving becomes worse than thr.1 and neighbour becomes better than thr.2 triggerQuantity

condition 2 fulfilled condition 1 fulfilled a5-Threshold2 offset

Hysteresis

s-cell a5-Threshold1 reportAmount

Hysteresis

reportQuantity

n-cell

time

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

8



Event B1

utra-RSCP/utraEcN0 RSSI(RXLEV)

Inter RAT neighbour becomes better than threshold

Hysteresis

OffsetFreq reportAmount

a1-ThresholdUTRA/GERAN

reportQuantity

time reportOnLeave

triggerType=event eventId=eventB1

timeToTrigger reportInterval

9



Event B2 Serving becomes worse than threshold1 and inter RAT neighbour becomes better than threshold2) triggerQuantity

utra-RSCP/utraEcN0 RSSI(RXLEV)

condition 2 fulfilled condition 1 fulfilled b2-Threshold2UTRA/GERAN OffsetFreq

Hysteresis

s-cell b2-Threshold1 reportAmount

Hysteresis

reportQuantity triggerType=event eventId=eventB2

n-cell

time reportOnLeave timeToTrigger reportInterval

10



triggerQuantity

Speed dependant scaling of measurement parameters

time timeToTrigger

timeToTriger:=timeToTrigger*sf-Medium

(medium-mobility detected)

timeToTriger:=timeToTrigger*sf-High

(high-mobility detected)

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Acronyms and Abbreviations AKA CCO CDMA DCCH DL EGPRS GERAN HO MME NAS PCCH PLMN PSI RAT RLC RNTI RRC RSCP RSRP RXLEV TMSI UE UL UTRAN

Authentication and Key Agreement Cell Change Order Code Division Multiple Access Dedicated Control Channel Downlink Enhanced General Packet Radio Service GSM/EDGE Radio Access Network Handover Mobility Management Entity Non-access Stratum Signalling Paging Control Channel Public Land Mobile Network Public Service Identity Radio Access Technology Radio Link Control Radio Network Temporary Identifier Radio Resource Control Received Signal Code Power Reference Signal Received Power Received Signal Level Temporary Mobile Subscriber Identity Number User Equipment Uplink 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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