Vzw Dual Band Mobility Settings v2

COPYRIGHT © 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED. ALCATEL-LUCENT — INTERNAL PROPRIETARY — USE PURSUANT TO COMPANY INSTRUCTION

October 23rd 2013

Dual Band Mobility settings

2COPYRIGHT © 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED.

ALCATEL-LUCENT — INTERNAL PROPRIETARY — USE PURSUANT TO COMPANY INSTRUCTION

Vzw Initial AWS deployment in NY



• Following launch on multiple sites in NYC, ALU has been monitoring traffic on AWS band

• Very few devices currently support AWS – PCMD analysis shows that 5 device models were seen on AWS up to now • Around 1-2% 3-8% of total device population on AWS – expected to go up

• AWS-capable devices are on AWS in average 40-50% of the time (some variations between sites)

• Idle mode setting already biased towards AWS through higher cell reselection priority

• Proposal is to consider more aggressive settings to retain devices on AWS as much as possible

Summary



AWS Overlay Coverage

700

AWS

AWS Coverage will not match 700 MHz Coverage

Sector misalignment

Reduced AWS cell radius vs 700 in all but densest environments

Propagation anomalies due to large frequency difference between bands

Extended AWS propagation at AWS coverage edge (lower noise than continuing 700)

700 MHz In-building coverage better than AWS



Idle mode Inter-frequency cell reselection

B4 B13

5

RSRPServing cell B4

Neighbor

Serving

Time

RSRP Target cell B13(lower prio)

tReselectionEUTRAN (2 s)

qRxLevMin + threshXLow

Lower priority cell is

reselected

qRxLevMin + sNonIntraSearch

UE starts measuring B13

qRxLevMin + threshServingLow

5

• qRxLevMin = -120dBm• sNonIntraSearch = 14 -> UE starts measuring B13 at -106dBm• threshServingLow = 4 -> UE reselects B13 at -116dBm, HO is at -111dBm



Idle mode Inter-frequency cell reselection

B13 B4

6

RSRPServing cell B13

NeighborServing

Time

RSRP Target cell B4(higher prio)

tReselectionEUTRAN (2 s)

qRxLevMin + threshXHigh

Higher priority cell is

reselected

• qRxlevMin = -120 dBm• threshXHigh = 20 UE will reselect the higher priority cell when B4 is better than -120 + 20 = -100 dBm

6



Dual band idle mode parameters

Object ParameterAWS settings (current and

proposed)B13 settings (current and

proposed)

Enb - ActivationServiceisInterFreqEutraSameFrameStructureMobilityAllowed

true true

Enb - LteCell - CellSelectionReselectionConf

pMax 23 23

qHyst 2dB 2dB

qRxLevMin -120 -114

qRxLevMinOffset 8 8

sIntraSearch 62 62

sNonIntraSearch 14 14

threshServingLow 5 4

CellReselectionConfLte id="0" (B13)

offsetFreq 0 0

cellReselectionPriority 3 3

qRxLevMin -120 -120

tReselectionEUTRAN 2 2

threshXHigh 20 20

threshXLow 0 0

CellReselectionConfLte id="0" (B4/AWS)

offsetFreq 0 0

cellReselectionPriority 5 5

qRxLevMin -120 -120

tReselectionEUTRAN 2 2

threshXHigh 20 10

threshXLow 0 0

1) AWS to B13 reselection at -115dBm (instead of -116dBm)2) B13 to AWS reselection at -110dBm (instead of -100dBm)



Dual band connected mode parameters

1) When on B4, UE starts measuring B13 at -109 - 1 = -110 dBm 2) When on B4, UE sends A5 report to trigger IFHO when 1) B4 cell is lower than -113 - 2 = -115dBm3) When on B4, blind redirection is triggered at -117 - 3 = -120 dBm

Object Parameter Value in DB for AWS Value for B13 700MHz

Enb - ActivationServiceisInterFreqEutraSameFrameStructureMobilityAllowed

true true

A2 Coverage alarmthresholdEutraRsrp -109

Hysteris 1

A1 Leaving alarmthresholdEutraRsrp -108

Hysteris 1

A5 inter-frequency

thresholdEutraRsrp (serving) -113

threshold2EutraRsrp -113

Hysteris 2

A2 Below Serving FloorthresholdEutraRsrp -117

Hysteris 3

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Documents

Vzw Dual Band Mobility Settings v2