RA47058EN16AGLA0 Mobility Layering

Mobility and Layering Slide 1

NokiaEDU Mobility Mobilit y and Layering Layering LTE Optimization Principles [FL16A] Module 08

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Copyright and confidentiality

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Module Objectives •

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After completing this module, you will be able to: •

Give an overview about related network and field KPIs

•

Discuss inter-layer mobility mo bility use cases

•

Summarize Summari ze relevant features and parameters

•

Analyse mobility mobilit y and and layering via means means of drive test results

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Index Fiel d KPIs - Network + Field - Inter-layer Mobility Optimization Use Cases UE capabilities Feature Group Indicator • Tracking Area optimization • Location Area optimization • LTE-capable UEs camping in 2G/3G • LTE inter-frequency handover optimization • Ping-pong mobility - Inter RAT robustness - Related features •

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Some Important Counter-Based Idle Mode Mobility KPIs

• none in BTS • In eNB there are no counters for idle mode mobilit y • In NSN MME there are counters for TAU success rate

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Driv e Te Test KPIs KPIs for Mobil Mobility ity

- Use case: UE is camping in 2G/3G when LTE coverage is better. •

Analysis requires simultaneous scanner + UE logging

•

Field test KPI TBD

- Use case: ping-pong cell reselection •

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Field test KPI TBD

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UE Capabilities Troubleshooting – FGI

- Common problem cases: •

UE does not support LTE inter-frequency handover + meas gaps

•

UE does not support LTE 3G ISHO

capabilities? - How to find out UE capabilities? - Why is this th is a problem?

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•

UE firmware feature details are often not known

•

Most drive test tools don’t don ’t decode Feature Group Indica tor in UE Capab Capability ility msg

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UE Capability Info, Feature Group Indicator Bitmap ….

interRAT-BandList value 5

inte in terR rRA ATT-N Need eedFor ForGa Gaps ps

: tru true e

Not decoded by all tools, too ls, see TS 36.331 Annex B

interRAT-BandList value 6

inte in terR rRA ATT-N Need eedFor ForGa Gaps ps

: tru true e

featureGroupIndicators B in in

Not all tools decode decode FGI

: 5E 5E 0D D8 80 (= 1577965696)

interRAT-Parameters utraFDD

•

Wireshark decodes.

•

Nemo 6.1 decodes partly

supportedBandListUTRA-FDD supportedBa suppor tedBandLi ndListU stUTRA-F TRA-FDD DD valu value e 1

: ban bandI dI

supportedBa suppor tedBandLi ndListU stUTRA-F TRA-FDD DD valu value e 2

: ban bandVIII dVIII

geran supportedBandListGERAN

supp su ppor ortted edBa Ban ndL dLiist stGE GERA RAN N va valu lue e 1

: gs gsm8 m850 50

supp su ppor ortted edBa Ban ndL dLis isttGE GERA RAN N valu lue e 2

: gs gsm9 m900 00E E

supp su ppor ortted edBa Ban ndL dLis isttGE GERA RAN N valu lue e 3

: gs gsm1 m180 800 0

supp su ppor ortted edBa Ban ndL dLiist stGE GERA RAN N va valu lue e4

: gsm gsm19 1900 00

inte in terR rRA ATT-PSPS-H HOO-T ToGE oGERAN RAN

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: false false

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UE Capability Info, Feature Group Indicator Bitmap featureGroupIndicators: ndicators: 5e0dd880 [bit length 32] 0... .. .. = Indicator cator 1: Intra-subframe freq hopping for PUSCH scheduled by UL grant; DCI format 3a; PDSCH transmiss ion mode Aperiodic 5; CQI/PMI/RI report on PUSCH: Mode 2-0 and 2-2 - Not supported .1.. .. .. = Indicator 2: Simultaneous CQI and ACK/NACK on PUCCH (format 2a/2b); Absolute TPC comm and for PUSCH; Resource alloc type 1 for PDSCH; Periodic CQI/PMI/R I report on PUCCH: Mode 2-0 and 2-1 - Supported ..0. .. .. = Indicator cator 3: 5bit RLC UM SN; 7bit PDCP SN - Not supported ...1 ... . = Indicator or 4: Short DRX cycle - Suppo Supported rted ... . 1... = Indicator Indicator 5: Long DRX cyc le; DRX command MAC control element - Supported ... . .1.. = Indicator cator 6: Prioritised bit rate -Supported .... . .1. = Indicator or 7: RLC UM - Suppo Supported rted .... ...0 = Indicator 8: EUTRA RRC _CO _CONNECT NNECTED ED to UTRA CELL_DCH PS handover - Not supported 0... .... = Indicator 9: EUTRA RRC_CONNECTED to GERAN GSM_Dedicated handover - Not Supported .0.. .... = Indicato r 10: EUTRA RRC_CONNECTED to GERAN (Packet_) Idle by Cell Ch ange Order; EUTRA RRC_CONNECTED to GERAN (Packet_) Idle by Cell Change Order with NACC - Not supported ..0. .... = Indicator 11: EUTRA RRC_CONNECTED to CDMA2000 1xRTT CS Active handover - Not supported ...0 .... = Indicator 12: EUTRA RRC_CONNECTED to CDMA2000 HRPD Active handover - Not supported .... 1... = Indicator 13: Inter-frequency handover - Supported ... . .1.. = Indicator cator 14: Measurement reporting event: Event A4 -N eighbor > threshold; Measurement reporting event: Ev ent A5 - Serving < threshold1 & Neighbor > threshold2 hreshold2 - Supported ... . ..0. = Indicator cator 15: Measurement reporting event: Event B1 -N eighbor > threshold -Not supported ... . ...1 = Indicator cator 16: non-ANR related periodical measurement reporting -Supported 1... .. .. = Indicator 17: Periodical measurement reporting for or SON / ANR ; ANR related intra-frequency measurement reporting events - Supported .1.. .. .. = Indicator cator 18: ANR related inter-frequency er-frequency m easurement reporting events events - Supported ..0. .. .. = Indicator cator 19: ANR related inter-RAT er-RAT meas urement reporting ing ev ents -N ot supported ed ... 1 .... = Indicator 20: SRB1 and SRB2 for DCCH + 8x AM DRB; SRB1 and SRB2 for DCCH + 5x AM DRB + 3x UM DRB (if indicator 7 is supported) - Supported ... . 1... = Indicator 21: Predefined intra- and inter-subframe frequency hopping for PUSCH with N_sb > 1; Predefined inter-subframe frequency hopping for PU SCH with N_sb > 1 -Supported ... . .0.. = Indicator 22: UTRAN measurements, reporting and measurement reporting event B2 in E-UTRA connected mode - Not supported ... . ..0. = Indicator 23: GERAN measurements, reporting and measurement reporting event B2 in E-UTRA connected mode - Not supported ... . ...0 = Indicator 24: 1xRTT meas urements, reporting and measurement reporting event B2 in E-UTRA connected mode - Not supported 1... .... = Indicato r 25: Inter-frequency measurements and reporting in E-UTRA connected mode - Supported .0.. .. .. = Indicator 26: HRPD HRPD m easurements, reporting and measurement reporting event B2 in E-UTRA connected mode - Not supported ..0. .... = Indicator 27: EUTRA RRC_CONNECTED to UTRA CELL_DCH CS handover - Not supported ... 0 .... = Indicator cator 28: TTI bundling -N ot supported ... . 0... = Indicator cator 29: Semi-Persistent Scheduling - Not supported ... . .0.. = Indicator cator 30: Handover between FDD and TDD - Not supported .... . .0. = Indicator or 31: Undefined Undefined - Not supported supported .... . ..0 = Indicator or 32: Undefined Undefined - Not supported supported

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Index - Network + Field KPIs - Inter-layer Mobility Optimization Use Cases • UE capabilities Feature Group Indicator • Tracking Area optimization • Location Area optimization • LTE-capable UEs camping in 2G/3G • LTE inter-frequency handover optimization • Ping-pong mobility - Related features

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Tracking Area Optimization – Benefits

- Paging carried in •

all cells in a TA, or

•

all cells in a list of TAs

- Tracking Area optimization is a trade-off between excessive paging load and excessive TA updates - Tracking Area optimization potential benefits •

Decrease Physical Downlink Shared Channel (PDSCH) Utilization Increase se throughput resource available for end users - Increa - Reduce admission control failures for VoLTE

•

Increase Physical Random Access Channel (PRACH) Availability - Improve user experience of network access and latency

•

Optimize Mobility Management Entity (MME) Paging and Tracking Update Performance - Improve the end user system availability experience

•

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Lengthen UE Battery Life by Reducing Mobility Related Signaling

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NOTE: Idle Mode Signaling Reduction increases 2G/3G/LTE paging but reduces TAU/RAU/LAU. Core feature, no support from eNB needed.

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Tracking Area Optimization – Trade-off - Paging increases in a linear fashion

as a TA is made larger. - TA Updates are inversely

proportional to the TA size. There is a diminishing improvement i mprovement in TA updates as the size increases. - The optimal size of a TA is call

model dependent. The rate at which UE move, receive DL data and enter idle mode influence the optimal size. - MME paging limitations must be

also considered! - MME paging capacity can be the limiting factor for TA size. RA47058EN16AGLA0

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To minimize TAUs, Tracking Tracking Areas should f ollow user mobility mobilit y patterns These are difficult to measure from BTS counters

– –

M8015 records handover for source-target sourc e-target pairs

–

Check MME counters in case of other vendor MME

Even if these are for connected mode, they probably approximate UE mobility patterns Nokia MME give TAU statistics only at TA level level

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Tracking Area Optimization – Typ ypical ical Case -

Heavy traffic along the road causes tracking area updates

-

Optimization solution 1: combine TAs 1-3 to one big T A •

Drawback: heavy paging load in eNBs

TAI = 3 TAI = 1

TAI = 2

Heavy traffic along al ong road road

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Tracking Area Optimization – Typ ypical ical Case -

Heavy traffic along the road causes tracking area updates

-

Optimization solution 2: put TAs 1-3 to the same TA list •

Drawback: heavy paging load in eNBs

TAI = 3 TAI = 1

TAI = 2

TA LIST: TAI = 1 TAI = 2

Heavy He avy tr affic

TAI = 3

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Index - Network + Field KPIs - Inter-layer Mobility Optimization Use Cases • UE capabilities Feature Group Indicator • Tracking Area optimization • Location Area optimization • LTE-capable UEs camping in 2G/3G • LTE inter-frequency handover optimization • Ping-pong mobility - Related features

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Location Area Optimization

EPS/IMSI attach/TAU in which MME assigns LAC to - CSFB capable UE makes combined EPS/IMSI UE –

LAC assigned based on TAI-LAI-VLR mapping table in MME

- When UE moves to 2G/3G, either because of normal cell reselection or CSFB, it will make LAU if 2G/3G LAC is different from LTE LAC - Question: should we set LTE LAC to be the same as 2G or 3G LAC?

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–

If LTE coverage is patchy, frequent LAU will occur occur when UE reselects to 2G/3G and back  signaling load and “CS paging black hole”

–

CSFB call setup time could increase increase because UE must make LAU first

–

BUT: there is a danger of UE ending up being unreachable unreachable or increased paging time if LTE LAC is the same as non-LTE LAC and UE goes camping in 2G/3G (next slide)

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Location Area Optimization, CS Paging Problem

- If CSFB UE does not make LAU when it reselects to 2G or 3G, MSS still assumes UE is in LTE and pages it first from there, and only afterwards in 2G/3G (depending on core implementation) - Solution 1: use 1: use Gs interface so that UE makes combined LAU/RAU when it reselects 2G/3G  MSS will be informed by SGSN that UE is in 2G/3G, and there is no CS paging delay

2: make sure that LTE LAC is different from 2G/3G LAC (can use dummy LAC - Solution 2: make in MME) •

Also MSS pooling, if used, may require that LTE LAC and 3G LAC are different

- Discuss options with core planning team!! •

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Also Idle Mode Signaling Reduction feature might be implemented in core (not all UEs support yet)…

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Attach Accept on LTE side assigns LAC Tim e RRC direction RRC message name 14:32:40.432 Uplink ATTACH_REQUEST (after combined EPC/IMSI Attach) 14:32:40.432 Uplink PD N_ N_C ON ONNE CT CTIVITY_RE QU QUES T 14:3 14 :32: 2:40 40.5 .514 14 Do Down wnli lin nk IDE DEN NTI TITY TY_R _REQ EQU UES EST T 14:32:40.514 Uplink IDENTITY_RESPONSE 14:3 14 :32: 2:40 40.5 .551 51 Do Down wnli link nk AUTH THEN ENTI TICA CATI TION ON_R _REQ EQU UES EST T 14:32:40.731 Uplink AUTHENTIC AT ATIO N_ N_R ES ESP ON ONS E 14:3 14 :32: 2:40 40.7 .731 31 Do Down wnli link nk SECU SE CURI RITY TY_M _MOD ODE_ E_CO COM MMAND 14:32:40.731 Uplink SE CU CUR IT ITY_MO DE DE _C _CO MP LE LETE 14:32:51.827 Do wn wn l in in k AT T AC AC H_ H_AC CE CEP T 14:3 14 :32: 2:51 51.8 .827 27 Do Downl wnlin ink k ACTI CTIV VATE TE_DE _DEFA FAU ULT LT_E _EPS_ PS_BEA BEARER RER_CO _CONT NTEX EXT_ T_REQ REQU UEST 14:32:51.835 Uplink ATTACH_COMPLETE 14:3 14 :32: 2:51 51.8 .835 35 Upl plin ink k ACT CTIIVATE TE_D _DEF EFA AULT LT_E _EPS PS_B _BEA EARE RER_ R_CO CON NTE TEX XT_ T_A ACC CCEP EPT T Here LTE reselection reselection or CSFB to 3G takes place, place, 3G cell has a different LAC than LTE cell 14:33:37.280 Up l in in k L OC OC AT AT IO IO N_ N_U PD PDAT IN IN G_ G_RE QU QUEST 14:3 14 :33: 3:37 37.2 .280 80 Upl plin ink k ROU RO UTI TIN NG_A _ARE REA A_U _UPD PDA ATE TE_R _REQ EQU UES EST T 14:3 14 :33: 3:37 37.9 .931 31 Do Down wnli link nk IDE DEN NTI TITY TY_R _REQ EQU UES EST T 14:33:38.133 Uplink IDENTITY_RESPONSE 14:3 14 :33: 3:39 39.3 .359 59 Do Down wnli link nk AUTH THEN ENTI TICA CATI TION ON_R _REQ EQU UES EST T LA Update Request required since 3G LAC 14:3 14 :33: 3:39 39.3 .359 59 Do Downl wnlin ink k AUTH THEN ENTI TICA CATI TION ON_A _AN ND_CI D_CIPH PHERI ERING NG_R _REQU EQUEST EST 14:33:39.538 Uplink AUTHENTIC AT ATIO N_ N_R ES ESP ON ONS E different from LTE LAC 14:3 14 :33: 3:39 39.7 .779 79 Upl plin ink k AUTH THEN ENTI TICA CATI TION ON_A _AN ND_ D_CI CIPH PHER ERIN ING G_R _RES ESPO PON NSE 14:3 14 :33: 3:40 40.1 .178 78 Do Down wnli link nk IDE DEN NTI TITY TY_R _REQ EQU UES EST T 14:33:40.178 Uplink IDENTITY_RESPONSE 14:3 14 :33: 3:40 40.8 .840 40 Do Down wnli lin nk GPR PRS_ S_IIDE DEN NTI TITY TY_R _REQ EQU UES EST T 14:33:40.840 Uplink GP RS RS_ID EN ENTITY_R ES ES PO PO NS NSE 14:3 14 :33: 3:41 41.0 .001 01 Do Downl wnlin ink k LOCATION_UPDATING_ACCEPT 14:33:41.059 Uplink TMSI_R EA EALLO CA CATIO N_ N_C OM OMP LE LE TE TE 14:3 14 :33: 3:41 41.0 .059 59 Do Down wnli link nk MM_I _IN NFO FORM RMATI TION ON 14:3 14 :33: 3:41 41.4 .479 79 Do Down wnli link nk ROU RO UTI TIN NG_A _ARE REA A_U _UPD PDA ATE TE_A _ACC CCEP EPT T

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LTE-capable UEs Camping in 2G/3G

- LTE-capable UEs should stay in LTE if there is coverage (and not excessive interference) - LTE uses Rel8 absolute priority based cell reselection •

In Rel8 3GLTE and 2GLTE HOs not supported

•

Hence in initial phases, idle mode mobility op timization is crucial

•

RU40 supports RRC Release with Redirect to LTE

- 3GLTE reselection use case: •

LTE layer(s) have higher priority p riority than 3G layer

•

LTE coverage area is a subarea of 3G coverage

- 2GLTE reselection use case

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•

Rural areas of 3G operators and non-3G operators

•

LTE layer(s) have higher priority than 2G layer

•

LTE coverage area is a subarea of 2G coverage

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Index - Network + Field KPIs - Inter-layer Mobility Optimization Use Cases

UE capabilities Feature Group Indicator • Tracking Area optimization optimization ation • Location Area optimiz • LTE-capable UEs camping in 2G/3G • LTE inter-frequency handover optimization • Ping-pong mobility - Inter RAT robustness - Related features •

Idle and and connected mode parameter knowledge knowledge is prerequisite f or this module. See •LTEPAR

training

Handover Handov er drops are covered in another module modul e of this training 23

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Interr freque Inte f requency ncy cell reselection reselection •

Idle mode strategies:

•

1. Priority Priority layer

•

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•

Limited coverage on capacity layer (hot-spots)

•

Larger bw on higher priority layer

LTE coverage Layer Priority 3

LTE capacity Layer Priority 4

2. Equal priority •

Similar or large overlapping coverage areas

•

Equal bw on both layers

•

Target to distribute users on both layers

•

Propagation loss difference between layers must be considered

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When a layer has higher priority that the serving the measurements are mandatory. If it has less or equal priority priority than t Usually one LTE layer is for coverage and one is for hot spots Inter-frequency connected mode mobility parameters must aligned with idle mode reselection strategy. Goal in initial phase is to ensure that UE is connected to the layer with the best RSRP if layers have the same bandwidth Assuming initial initial deployment deployment with low-to-medium low-to-medium load load Load balancing features in roadmap If the layers have different bandwidths, the lower bandwidth layer should have higher RSRP to reach equivalent throughput Example: About 5-8 dB higher for 10MHz versus 20MHz … though handover thresholds could be decided based on many other criteria too he serving measurements are only started when RSRP below SNonIntrasearch

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Inter-frequency HO Optimization - IFHO meas gaps should not be activated too early •

Activating IFHO measurements reduces UE tput due to meas gaps

•

Activating IFHO measurements deactivates DRX for smart phones



increases battery consumption

TCP and UDP DL tput, with and without measurement gap, 10MHz system

80 70 60 MEAS GAP ON UDP

s 50 p b

MEAS GAP OFF UDP

t, 40

MEAS GAP ON TCP

M u pt

30

MEAS GAP OFF TCP

20 10 0 1

6

11

16

21

26

31

36

41

46

51

56

time, seconds

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Inter-frequency HO Optimization

- HO should not be triggered to o early, an aggressive trigger point would be RSRP below -115dBm @20MHz bandwidth if there is coverage from a better neighbor layer •

Otherwise end user experience suffers

•

If interference interference present, threshold t hreshold may need to be much much higher

•

Based on field measurements, RSRP <-115dBm results in <20Mbps tput for 20MHz unloaded system. Anything above this is usually usually still ok for web browsers…

practical user tput t put benefit - Triggering HO at RSRP > -100dBm produces littl e practical

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•

TCP and internet limit practical tput of end users

•

Speed test users are another story..

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Inter-frequency HO Optimization

- A3 offset depending on target layer bandwidth •

If ta targ rget et bw bw is is sam same: e:

a3of a3 offs fset et ~3d ~3dB B

•

If target bw is half:

a3offset ~ 8dB

•

If target bw is double: a3offset ~ 0dB (or even negative??!!)

- The above rules of thumb are based on t he principle that user tput should not suffer in target layer •

The call should not drop either

•

In RL40 load balancing intra eN B, inter eNB / inter RAT in RL50 and beyond

- No point to activate IFHO in cells where there is no other layer coverage - Settings should be such that ping-pong is not possible for any pair of layers •

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At least 5dB margin

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Ping-Pong Idle + Connected Mode Mobility

- For every pair of layers, triggering thresholds should be checked for –

Idle-idle ping-pong

–

Idle-connected ping-pong

–

Connected-idle ping-pong

–

Connected-connected ping-pong

- Example of idle-connected ping-pong:

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1.

3GLTE idle mode reselection takes place place at when LTE received received level leve l is RSRP = 125dBm

2.

In LTE, LTE, UE goes to conn connec ected ted mode due to alwa always-on ys-on applica application tionss

3.

A2 RRC red redire irect ct to UT UTRA RA thresh threshold old ha hass been been set set to to -12 -120dB 0dBm m

4.

A2 is tri trigger ggered ed and and UE UE is red redire irecte cted d back back to 3G

5.

…and so on… go to step 1

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Index Fiel d KPIs - Network + Field - Inter-layer Mobility Optimization Use Cases UE capabilities Feature Group Indicator • Tracking Area optimization • Location Area optimization • LTE-capable UEs camping in 2G/3G • LTE inter-frequency handover optimization • Ping-pong mobility Inter RAT robustness - Related features •

•

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LNBTS:actMroInterRatUtran Activate MRO inter-RAT Activate inter-RAT UTRA UTRAN N 0 (false), 1 (true)

Types of “bad” handovers

Default 0

HO aims to supply connection continuum. In network also occur different types of unwanted HO’s.

Too Early Type1 Handover

Too Early Type2 Handover (to wrong cell)

Too Late Handover

Target UTRAN Cell Source LTE Cell

Source LTE Cell

Target UTRAN Cell

1. Handover attempt to Target Cell

Source LTE Cell

Neighbor LTE Cell

1. Radio Link Failure 2. Reconnection to Target Cell

2. Radio L ink Failure Failure 3. Reconnection to Source Cell

Target UTRAN Cell

1. Handover attempt to Target Cell 2. Radio L ink Failure Failure 3. Reconnection to Neighbor Cell

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•The

following InterRat handover handov er failure failure use cases are monitored between LTE and UTRAN:

•Too

Late inter-RAT HO from LTE to 3G

•Too

Early inter-RAT HO with an HO failure from LTE to 3G

•

provides an automatic method, implemented in iSON Manager, for optimizing the B2 threshold2 measurement threshold which is used to trigger handover to UTRAN.

•

optimizes both the data-only B2 threshold2 as well as the VoLTE-specific B2 threshold2 for WCDMA

•

PM counters are provided by the eNB to use it as an input to the MRO algorithm.

•

MRO algorithm determines whether any threshold adjustment is needed,

•

If any adjustment is required, the MRO algorithm pushes the updated thresholds down to the eNB (via NetAct)

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Inter-RAT Neighbor cell signal

Signal Level B2 trigger B2 thold 2 B2 thold 1 RSRP serving move direction

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Existing counters from LTE1749 N u m be r

A bbre v na me

Ful l na me

M801 M8 013C 3C62 62

UE_C UE _CT TX_ X_S SET ETUP UP_S _SUC UCC C_R _REL EL11 11H_ H_UE UE

Success ssffully esta establ bliish she ed UE Con onte texxts (f (for Re Relleas ase e 11+ 11+ UE UEs) s)

M803 M8 032C 2C0 0

MRO_ MR O_LA LAT TE_ E_H HO_ O_UT UTRA RAN_ N_B2 B2T T2_ 2_P P_F

Late Han Late ando dovver to UT UTRA RAN N (t (th hre resh shol old d B2T B2T22-P PSHO not not met) pe perr UT UTRA RAN N frequency

M 80 803 2C 2C1

M RO RO_L AT ATE_ HO HO_ UT UTR AN AN_ B2 B2T2_V _F _F

L at ate Ha nd nd ov over to to UT UTR AN AN (thr es es ho ho ld ld B 2T 2T2 -V -V oL oL TE TE no no t met) pe per UTRAN frequen frequency cy

M803 M8 032C 2C3 3

MRO_ MR O_EA EARL RLY Y_H _HO_ O_UT UTRA RAN_ N_B2 B2T T2_ 2_P P_F

Earlyy Ha Earl Han ndo dove verr to to UT UTRA RAN N (th thre resh shol old d B2T B2T22-P PSHO me met) pe perr UT UTRA RAN N frequency

M803 M8 032C 2C4 4

MRO_ MR O_EA EARL RLY Y_H _HO_ O_UT UTRA RAN_ N_B2 B2T T2_ 2_V_ V_F F

Earlyy Ha Earl Han ndo dove verr to to UT UTRA RAN N (t (th hre resh shol old d B2T B2T22-Vo VoLT LTE E me met) pe perr UT UTRA RAN N frequency

M 80 803 2C 2C6

ISYS_ HO HO_U TR TR AN AN_ PS PSHO_A TT TT_F

Inter Sy Syst em em Ha nd nd ov over a tt ttemp ts ts to UTR AN AN (E ve vent B2 -P -PSHO M et et) p er er UTRAN frequen frequency cy

M 80 803 2C 2C7

ISYS_ HO HO_U TR TR AN AN_ VO VOLTE _A _A TT TT_F

Inter System Ha Ha nd nd ov over a tt ttemp ts ts to UTR AN AN (E ve vent B2 B2 -V -V oL oL TE TE M et et ) per UTRAN frequen frequency cy

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Index Fiel d KPIs - Network + Field - Inter-layer Mobility Optimization Use Cases UE capabilities Feature Group Indicator • Tracking Area optimization • Location Area optimization • LTE-capable UEs camping in 2G/3G • LTE inter-frequency handover optimization • Ping-pong mobility - Inter RAT robustness • Related features •

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Related features • • • • • • • • • • • • • • • • •

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PS handover based CSFB LTE736 RL40 CSFB to CDMA/1xRTT CDMA/1xRTT LT LTE874/LTE1441 E874/LTE1441 RL60 SRVCC to 1xRTT 1xRTT/CDM /CDMA A LT LTE738 E738 FL15A F L15A Service based mobility LTE1127 RL70 Service Servic e based handover handover Thresholds LT LTE64 E64 FL15A Dedicated VoLTE VoLTE inter-fr equency target target fr equency list LTE1942 FL15A RAN Infor mation Management for WCDMA W CDMA LT LTE1196 E1196 FL15A Interr RAT HO Inte HO from UTRAN UTRAN LTE57 RL60 Inter RAT HO from eHRPD/3GPP2 eHRPD/3GPP2 LT LTE60 E60 RL60 RIM for GSM LTE498 RL60 SRVCC to WCDMA LTE872 RL40 E-RAB modification LTE519 RL40 RSRQ triggered tri ggered mobility LT LTE E 1198 RL60 RL60 Inter eNB Inter-Frequenc Inter- Frequency y Load Balancing LTE1170 LTE1170 RL50, LTE1531 RL60, Idle Mode Load Balancing LTE487 RL50, LTE1677 RL60, LTE2051 FL15A LTE-UTRAN LT E-UTRAN Load Balancing LTE1357 FL15A Downlink Car rier Aggregation LTE1089 RL50, LTE1332 RL60, LTE1803, LTE1562 RL70, LTE1804, LTE2158, LTE2305, LTE2006, FL15A,

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• • • • •

Inter Frequenc y Load Equalization LTE1841 RL70 Load Triggered Idle Mode Load Balancing LTE2050 RL70 Dedicated Mobility Mobility thresholds for SRVCC LTE2112 LTE2112 RL70 ANR AN R RL10..RL7 RL10..RL70 0 LTE2539: MRO Inte InterRat rRat UTRAN FL16 LTE1749: LT E1749: Mobility Robustness Monitoring Inter I nter RAT FL16 LTE2162: LT E2162: SRVCC S RVCC for network deployments not supporting PSHO FL16 LTE2210: LT E2210: Intra I ntra Frequency load balancing extensions FL16 F L16 LTE2166: Support of dedicated idle mode mobility priorities FL16 LTE2057: Extended Measurement Control LTE2057: C ontrol (FL16A) LTE1723: S1-based handover towards Home eNode B (FL16A) LTE2551: RSRQ-based A5 (FL16A) LTE2832: SRVCC Due to Admission Control Rejection (FL16A) LTE2591: UE-level MRO (FL16A)

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NokiaEDU

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RA47058EN16AGLA0 Mobility Layering

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