inter working design verification test results
TRANSCRIPT
KSD ProjectLTE-WCDMA Inter-Working Design Verification
Tuesday 6th September
Final Report
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 2
Agenda
1. Test Cases2. Routes3. Test Setup4. Methodology5. Session Continuity Release-Redirect (L W)
5.1. Throughput Analysis5.2. Interruption Times
6. Idle Analysis (L W)7. Scanner Analysis
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 3
1. Test Cases
Inter-working Design Verification Testing involved two sets of test cases for 20Watt & 60Watt Sites.
For 20W Site configuration, three sets of Inter-Working Parameters were tested, these Parameter Sets are known as TC1, TC2 & TC3
For 60W Site configuration, two sets of Inter-Working Parameters were tested, known as 60W-TC1 & 60W-TC2.
Note that 60W-TC1 Parameters are the same as 20W-TC1
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 4
1. Test Cases – 20W Parameter Sets
The Parameter Sets tested for 20W Site Configuration : 20W_TC120W_TC220W_TC3
-124-120‐116a1ThresholdRsrpPrimReportConfigA1PrimLTE
-119-115‐111b2Threshold2RscpUtra ReportConfigB2Utra LTE
-125-121‐117b2Threshold1RsrpReportConfigB2UtraLTE
-125Hysteresis ‐1
-121Hysteresis ‐1
‐117Hysteresis ‐1
a2ThresholdRsrpPrimReportConfigEUtraBadCovPrimLTE
-128-124‐120qRxLevMinEUtranCellFDDLTE
Parameter Set
20W_TC3Parameter Set
20W_TC2Parameter Set
20W_TC1ParameterManaged ObjectRAN
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 5
1. Test Cases – 60W Parameter Sets
The Parameter Sets tested for 60W Site Configuration : 60W-TC160W-TC2
-112‐116a1ThresholdRsrpPrimReportConfigA1PrimLTE
-107‐111b2Threshold2RscpUtra ReportConfigB2Utra LTE
-113‐117b2Threshold1RsrpReportConfigB2UtraLTE
-113Hysteresis ‐1
‐117 Hysteresis ‐1
a2ThresholdRsrpPrimReportConfigEUtraBadCovPrimLTE
-116‐120qRxLevMinEUtranCellFDDLTE
Parameter Set
60W_TC2Parameter Set
60W_TC1ParameterManaged ObjectRAN
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 6
Agenda
1. Test Cases2.Routes3. Test Setup4. Methodology5. Session Continuity Release-Redirect (L W)
5.1. Throughput Analysis5.2. Interruption Times
6. Idle Analysis (L W)7. Scanner Analysis
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 7
2. Routes
Two locations were used to conduct the Test Cases, with 3 distinct drive-routes :
Williamstown, Site LRD : WLNDFitzroy Sub-Cluster, Multiple Sites, Core-Drive-RouteFitzroy Sub-Cluster, Radial Reselection Drive-Routes
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 8
2. Routes – Williamstown, WLND
STARTEND
Drive Test Route used for initial 20W Configuration Tests, TC1, TC2, TC3And 60W-TC1 & 60W-TC2 Test Cases
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 9
2. Routes – Fitzroy Sub-Cluster : Core20W Configuration ; Cluster Core Drive-Route , TC1 & TC2
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 10
2. Routes – Fitzroy Sub-Cluster : Radials20W Configuration ; Radial Reselect Drive-Routes , TC1 & TC2
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 11
Agenda
1. Test Cases2. Routes3.Test Setup4. Methodology5. Session Continuity Release-Redirect (L W)
5.1. Throughput Analysis5.2. Interruption Times
6. Idle Analysis (L W)7. Scanner Analysis
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 12
MS3
4-Way Splitter
6 dB attenuation
4-Way Splitter
6 dB attenuation
1800 BandAntennaGPS
Receiver
MS1 (UL)
W850 Locked
MS2 (UL)
L1800 Locked
MS3
MX Scanner
Laptop 1
1800 BandAntennaUSB GPS
Antenna850 BandAntenna
10 dB Attenuator
10 dB Attenuator
1800 BandAntenna
Laptop 2
USB Hub
2.5 dBigain
MS1 (DL)
W850 Locked
MS2 (DL)
W1800 Locked
3. Test Setup – Equipment Used for Interworking Drives
~1.5dB Cable Loss ~1.5dB Cable Loss
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 13
Agenda
1. Test Cases2. Routes3. Test Setup4.Methodology5. Session Continuity Release-Redirect (L W)
5.1. Throughput Analysis5.2. Interruption Times
6. Idle Analysis (L W)7. Scanner Analysis
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 14
4. Methodology – Active Interruption Time Measurement Points
RRC Connection Release (DL-DCCHModify PDP Context Accept
MRMR
IT
Ave HS Throughput
Ave LTE:
-Throughput
-BLER
-RSRP
LTE
HS
MR = Measurement Report ID 2
IT= Interruption Time
20 second sampling –using raw FMT data
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 15
1. RRC Connection Release (DL-DCCH)2. System Information (BCCH-BCH)3. RRC Connection Request (UL-CCCH)4. Routing Area Update Accept5. Modify PDP Context Accept
› UP Interruption Time= Modify PDP Context Accept-RRC Connection Release (DL-DCCH)
– T1= (2) - (1)– T2= (3) - (2)– T3= (4) - (3)– T4= (5) - (4)–– UP Interruption Time = T1+T2+T3+T4UP Interruption Time = T1+T2+T3+T4
4. Methodology – Active Interruption Time : Messages
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 16
12 3
InterRAT-CellReselection Time = {4} – {1}
T1 = System Info Block TIME (2) – ML1 Serving Cell Measurements & Evaluation TIME (1)
T2 = RRC Connection Request TIME (3) - System Info Block TIME (2)
T3 = Routing Area Update Complete TIME (4) - RRC Connection Request TIME (3)
4. Methodology – Idle Interruption Time : Messages
4
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 17
Agenda
1. Test Cases2. Routes3. Test Setup4. Methodology5. Session Continuity Release-Redirect (L W)
5.1. Throughput Analysis5.2. Interruption Times
6. Idle Analysis (L W)7. Scanner Analysis8. Idle Analysis (W L)
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 18
RSRP Distribution: 20W TC1,TC2 & 60W TC1,TC2
All the RSRP MR’s, From 1st MR A2 to RRC release
20W_TC1 : A2 = -118dB
20W_TC2 : A2 = -122dB
20W_TC3 : A2 = -126dB
60W_TC1 : A2 = -118dB
60W_TC2 : A2 = -114dB
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 19
RSRP Distribution – 20W TC3
All the RSRP MR’s, From 1st MR A2 to RRC release
20W_TC1 : A2 = -118dB
20W_TC2 : A2 = -122dB
20W_TC3 : A2 = -126dB
60W_TC1 : A2 = -118dB
60W_TC2 : A2 = -114dB
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 20
RSRP Distribution Measurement Period: From 1st MR A2 to RRC release
0
10
20
30
40
50
60
70
80
90
100
-132 -130 -128 -126 -124 -122 -120 -118 -116 -114 -112 -110 -108
RSRP(dBm)
CD
F
TC1 TC2 TC3 TC1_60W TC2_60W20W_TC1 : A2 = -118dB
20W_TC2 : A2 = -122dB
20W_TC3 : A2 = -126dB
60W_TC1 : A2 = -118dB
60W_TC2 : A2 = -114dB
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 21
WCDMA RSCP
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
1.1
-110 -105 -100 -95 -90 -85 -80 -75 -70 -65 -60 -55 -50 -45 -40
RSCP
CD
F %
TC1 TC1_60W TC2 TC2_60W TC3
Williamstown
•RSCP measurement is just after the RRC Connection Release (DL-DCCH).
•This can be use to fine tune b2Threshold2RscpUtra, if eventb2 is activated in the eNodeB ( and supported by UE)
• The device that were use during these tests doesn't support event B2.
•WCDMA coverage (90% of RSCP is better than -85dbm- @ re-direction)
•WCDMA_TPL= 35-4.6 +85=115dB
•LTE_TPL= 17+118=135dB
•Delta TPL = 20dB (WCDMA better)
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 22
Test Cases-TPL
132
134
136
138
140
142
144
146
TC1 TC2_60W TC2 TC1_60W TC3
TPL(
dB)
TPLTPL_20W_TC1= 17+119 = 136dB
TPL_20W_TC2= 17+123 = 140dB
TPL_TC2_60W= 22+114 = 136dB
TPL_TC1_60W= 22+119 = 141dB
TPL_20W_TC3= 17+127 = 144dB
20W_TC1 : A2 = -118dB
20W_TC2 : A2 = -122dB
20W_TC3 : A2 = -126dB
60W_TC1 : A2 = -118dB
60W_TC2 : A2 = -114dB
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 23
PUSCH Phy Throughput & PUSCH (BLER%)
123
70
113
71
32
0
20
40
60
80
100
120
140
TC2_60W TC1_60W TC1 TC2 TC3
Test Cases
PUSC
H-P
hy T
hrpu
t(kbp
s)
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
PUSC
H-P
hy (B
LER
%)
PUSCH_UL (Median) PUSCH BLER (%) (Median)
136dB 141dB 136dB 140dB 144dB
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 24
PDSCH & PUSCH Phy T’put & PDSCH (BLER%)
123 70 113 71 320
1000
2000
3000
4000
5000
6000
7000
8000
TC2_60W TC1_60W TC1 TC2 TC3
Thrp
ut(K
bps)
0
2
4
6
8
10
12
14
16
18
BLE
R(%
)
PDSCH_DL (Median) PUSCH_UL (Median) PDSCH BLER (%) (Median)
136dB 141dB 136dB 140dB 144dB
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 25
LTE & HS Phy-DL Throughput
0
500
1000
1500
2000
2500
3000
3500
4000
4500
5000
5500
6000
6500
7000
7500
8000
TC2_60W TC1_60W TC1 TC2 TC3
Thrp
ut(K
bps)
PDSCH_DL (Mean) PDSCH_DL (Median) HS-DL (Mean) HS-DL (Median)
136dB 141dB 136dB 140dB 144dB
HS Physical Layer DL Throughput is being reported inaccurately by TEMS Investigation
Recently confirmed and has been raised with ASCOM
Non-TEMS Connected UE Tests show 8Mb/s on DL
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 26
LTE & HS-EDCH Phy-UL Throughput
0
100
200
300
400
500
600
700
800
900
1000
TC2_60W TC1_60W TC1 TC2 TC3
Thrp
ut (k
bps)
PUSCH_UL (Mean) PUSCH_UL (Median) HS UL E-DCH (Mean) HS UL E-DCH (Median)
136dB 141dB 136dB 140dB 144dB
HS Physical Layer UL Throughput has been confirmed to be reported accurately by TEMS Investigation.
The Inaccurate reporting with TEMS is confined to DL HS-Throughput only.
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 27
RAN Solution Verification Lab Test Results-Service Contours
All Test Results are based on 60W Transmission
RSRP with 20WRSRP with 20W= 17= 17--145=145=--128dBm128dBm
RSRP with 20WRSRP with 20W= 17= 17--(153(153--4.6)=4.6)=--131.4dBm131.4dBm
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 28
Results combined with Service Contour Findings
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 29
Statistics - Throughput & BLERMean Median Standard Deviation Count
TC1_PDSCH_DL 4214 3703 3180 108TC2_PDSCH_DL 1962 2084 1576 119TC3_PDSCH_DL 1207 769 1381 76TC2_60W_PDSCH_DL 6667 7612 2707 35TC1_60W_PDSCH_DL 3691 4037 1729 54TC1_PUSCH_UL 183 113 232 92TC2_PUSCH_UL 83 71 52 94TC3_PUSCH_UL 35 32 15 28TC2_60W_PUSCH_UL 138 123 66 33TC1_60W_PUSCH_UL 72 70 36 44TC1_HS-DL 340 290 333 5134TC2_HS-DL 348 287 384 5670TC3_HS-DL 353 370 312 1272TC1_60W_HS-DL 342 370 259 2667TC2_60W_HS-DL 348 435 333 1647TC1_HS UL E-DCH 659 357 863 797TC2_HS UL E-DCH 870 557 1051 1075TC3_HS UL E-DCH 889 541 1037 313TC1_60W_HS UL E-DCH 562 5 815 486TC2_60W_HS UL E-DCH 575 526 680 383TC1_PDSCH BLER (%) 8 6 8 98TC2_PDSCH BLER (%) 11 8 12 105TC3_PDSCH BLER (%) 17 16 14 65TC1_60W_PDSCH BLER (%) 9 6 9 48TC2_60W_PDSCH BLER (%) 6 5 5 28TC1_PUSH BLER (%) 0.2 0.2 0.2 449TC2_PUSH BLER (%) 0.2 0.2 0.1 464TC3_PUSH BLER (%) 0.4 0.4 0.1 142TC1_60W_PUSH BLER (%) 0.3 0.3 0.1 205TC2_60W_PUSH BLER (%) 0.2 0.2 0.1 150
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 30
Agenda
1. Test Cases2. Routes3. Test Setup4. Methodology5. Session Continuity Release-Redirect (L W)
5.1. Throughput Analysis
5.2. Interruption Times6. Idle Analysis (L W)7. Scanner Analysis
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 31
Interruption time- Session continuity (Release-Redirect)
Interruption time_Median
4.2
4.4
4.6
4.8
5
5.2
5.4
5.6
TC2_60W TC1_60W TC1 TC2 TC3
Inte
rrup
tion
time_
Med
ian
(sec
)
Interruption time
20W_TC1 : A2 = -118dB
20W_TC2 : A2 = -122dB
20W_TC3 : A2 = -126dB
60W_TC1 : A2 = -118dB
60W_TC2 : A2 = -114dB
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 32
In te r ru p tio n tim e -B re a k d o w n (M e d ia n )
0
1
2
3
4
5
6
TC 2 _ 6 0 W TC 1 _ 6 0 W TC 1 TC 2 TC 3
Seco
nds
T1 T2 T3 T4
1. RRC Connection Release (DL-DCCH)2. System Information (BCCH-BCH)3. RRC Connection Request (UL-CCCH)4. Routing Area Update Accept5. Modify PDP Context Accept
› UP Interruption Time= Modify PDP Context Accept-RRC Connection Release (DL-DCCH)– T1= (2) - (1)– T2= (3) - (2)– T3= (4) - (3)– T4= (5) - (4)–– UP Interruption Time = T1+T2+T3+T4UP Interruption Time = T1+T2+T3+T4
Interruption time -Breakdown
20W_TC1 : A2 = -118dB
20W_TC2 : A2 = -122dB
20W_TC3 : A2 = -126dB
60W_TC1 : A2 = -118dB
60W_TC2 : A2 = -114dB
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 33
Time from 1st MR-A2 to Acquiring SI on WCDMA
Time from 1st MRA2-to Acquiring System info (Median)
0.910.920.930.940.950.960.970.980.99
11.01
TC2_60W TC1_60W TC1 TC2 TC3
Seco
nds
Time from1st MR A2-to Acquiring System info.
136dB 141dB 136dB 140dB 144dB
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 34
Statistics- Interruption time Test cases Interruption time T1 T2 T3 T4 Time from1st MR A2‐to Acquiring System info.TC2_60W Mean 5.805 0.4475 1.33 1.820833 2.206667 0.963333333TC2_60W Median 5.23 0.435 1.46 1.78 1.52 0.94TC2_60W Standard Deviation 1.985115064 0.066075 0.325967 0.228929 2.015009 0.065273318TC2_60W Count 12 12 12 12 12 12TC1_60W Mean 5.957407407 0.43963 1.266667 1.854815 2.396296 0.964444444TC1_60W Median 5.44 0.43 1.27 1.82 1.48 0.94TC1_60W Standard Deviation 1.728264119 0.074187 0.313798 0.360399 1.824738 0.074282897TC1_60W Count 27 27 27 27 27 27TC1 Mean 6.34516129 0.448387 1.050968 2.634516 2.21129 0.989032258TC1 Median 4.65 0.43 1.06 1.68 1.27 0.95TC1 Standard Deviation 5.747889973 0.111776 0.584821 5.206637 1.999411 0.344609488TC1 Count 31 31 31 31 31 31TC2 Mean 5.286333333 0.515 1.170333 1.637667 1.963333 1.041666667TC2 Median 5.115 0.45 1.125 1.725 1.435 0.985TC2 Standard Deviation 1.476502118 0.308531 0.694359 0.831454 1.364335 0.317415026TC2 Count 30 30 30 30 30 30TC3 Mean 6.611 0.427 1.298 2.062 2.824 1.016TC3 Median 5.405 0.415 1.425 1.725 1.63 1TC3 Standard Deviation 2.270988282 0.077467 0.518133 0.980961 2.151486 0.188750276TC3 Count 10 10 10 10 10 10
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 35
Agenda
1. Test Cases2. Routes3. Test Setup4. Methodology5. Session Continuity Release-Redirect (L W)
5.1. Throughput Analysis5.2. Interruption Times
6. Idle Analysis (L W)7. Scanner Analysis
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 36
Idle Mode-Interruption time ( LTE to WCDMA)
Idle Mode -Interruption time
0
1
2
3
4
5
6
7
8
9
10
TC1 TC1_60W TC2 TC2_60W TC3
IT (s
econ
ds)
Mean Median
1 bad sample –out of 6
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 37
Idle Mode-Interruption time -Stats( LTE to WCDMA)
Mean Median Mode CountTC1 4.979167 3 3 48
TC1_60W 3.551724 3 3 29TC2 3.103448 3 3 29
TC2_60W 2.916667 3 3 12TC3 9.166667 3 3 6
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 38
Agenda
1. Test Cases2. Routes3. Test Setup4. Methodology5. Session Continuity Release-Redirect (L W)
5.1. Throughput Analysis5.2. Interruption Times
6. Idle Analysis (L W)7.Scanner Analysis
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 39
WCDMA & LTE TPL : CDF : (Cluster drive- Scanner Data)
Based on Scanner DataLTE TPL = 17dBm – RSRP - 15dB (Att)
WCDMA TPL = (35dBm – 4.6 feeder-loss dB) – RSCP
Based on Scanner DataLTE TPL = 17dBm – (RSRP - 15dB (Att))WCDMA TPL = (35dBm – 4.6 feeder loss dB) –(RSCP - 15dB (Att))
•5 to 6 dB difference in TPL (taken into account the design consideration)
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 40
Cluster – Scanner TPL Based on Scanner DataLTE TPL = 17dBm – (RSRP - 15dB (Att))WCDMA TPL = (35dBm – 4.6 feeder loss dB) –(RSCP - 15dB (Att))
Fringe cell-samplesCore- cell-(co-located)
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 41
All Drives (Cluster & Radial) –RSRP vs RSCPScanner data 5m Binned -15dB attenuated
Fringe cell
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 42
Cluster Drive –RSRP vs RSCPScanner data 5m Binned -15dB attenuated
Almost all the samples (RSRP) are above -110dBm ( 8 dB above the A2 threshold).
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 43
Cluster Drive –RSRP vs RSCPScanner data 5m Binned -15dB attenuated
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 44
Radial Drive –RSRP vs RSCPScanner data 5m Binned -15dB attenuated
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 45
Cluster Drive –Delta (RSCP- RSRP) CDFScanner data 5m Binned -15dB attenuated
RSCP~RSRP+17dB (within core area)
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 46
Radial Drive –Delta (RSCP- RSRP) CDFScanner data 5m Binned -15dB attenuated
Sample from cluster drive routes
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 47
All Drives (Cluster & Radial) –RSRP vs RSCPIdle Mode Analysis
Both RSRP & RSCP Attenuated by 15dB
Hysteresis region Hysteresis region Stable on either Stable on either WCDMA or on LTE WCDMA or on LTE (13% of Samples)(13% of Samples)
threshHigh = 10 -> -110
WCDMA to LTE Reselection Region (70% of samples). Since RSCP >-105, UE will measure LTE every 60 seconds
sNonIntraSearch -112threshServingLow -116
LTE to WCDMA Reselection Region (17% of samples)LTE to WCDMA Reselection Region (17% of samples)
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 48
Cluster Drive –RSRP vs RSCPScanner data 5m Binned -15dB attenuated
Hysteresis region Hysteresis region Stable on either Stable on either WCDMA or on LTE WCDMA or on LTE (1% of Samples)(1% of Samples)
threshHigh = 10 -> -110
sNonIntraSearch -112
threshServingLow -116
WCDMA to LTE Reselection Region (99% of samples). Since RSCP >-105, UE will measure LTE every 60 seconds
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 49
Cluster-RSRP Distribution (Raw data-5m Binned)- Not attenuated
A2 Threshold (A2 Threshold (--118dBm)118dBm)
98%98%--> 28 dB margin > 28 dB margin
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 50
Scanner Plot : RSRP 15dB AttenuatedOn-Air
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 51
WCDMA to LTE – Reselection Scenarios
› Scenario 1:– UE moves from LTE (Idle State) to WCDMA and back to LTE
-> Successful› Scenario 2:
– UE moves from WCDMA (RRC_Idle –NO PDP context) to LTE coverage area.
-> Tracking Area Reject
› Scenario 3:– UE moves from WCDMA ( Active Mode) to LTE coverage and re-
select to LTE-> Successful
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 52
WCDMA to LTE- Reselection Results
Re-selection Time-Scenario 2 = 1st DL System Information Block Type1 (DL-BCCH-SCH) - UL Attach Complete EUTRAN Attach Complete
Re-selection Time-Scenario 1&3 = 1st DL System Information Block Type1 (DL-BCCH-SCH) - UL Tracking Area Update Complete
Re-selection Time (seconds)-Scenario 2 Re-selection Time (seconds) (Scenario 1 & 3)
Mean 13.2 0.9Median 12.0 0.9Mode 12.0 0.9Standard Deviation 3.3 0.1Minimum 11.7 0.4Maximum 23.5 1.0Count 30 38
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 53
Scenario 1UE moves from LTE (Idle State) to WCDMA and back to LTE-1/5
UE in LTE
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 54
Scenario 1UE moves from LTE (Idle State) to WCDMA and back to LTE-2/5
LTE to WCDMA Re-selection
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 55
Scenario 1UE moves from LTE (Idle State) to WCDMA and back to LTE-3/5
RAU complete-successful!!
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 56
Scenario 1UE moves from LTE (Idle State) to WCDMA and back to LTE-4/5
UE is now on WCDMA- RRC idle mode
RRC idle
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 57
Scenario 1UE moves from LTE (Idle State) to WCDMA and back to LTE-5/5
First SIB on LTE
750ms Re-selection Time
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 58
Scenario 2:UE moves from WCDMA (RRC_Idle –NO PDP context) to LTE coverage area. - 1/3
UE in RRC idle
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 59
Scenario 2:UE moves from WCDMA (RRC_Idle –NO PDP context) to LTE coverage area. - 2/3
First SIB on LTE
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 60
Scenario 2:UE moves from WCDMA (RRC_Idle –NO PDP context) to LTE coverage area. - 3/3
12s Re-selection Time
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 61
Scenario 3:UE moves from WCDMA ( Active Mode) to LTE coverage and re-select to LTE -1/5
UE in RRC idle
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 62
Scenario 3:UE moves from WCDMA ( Active Mode) to LTE coverage and re-select to LTE -2/5
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 63
Scenario 3:UE moves from WCDMA ( Active Mode) to LTE coverage and re-select to LTE -3/5
FACH State
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 64
Scenario 3:UE moves from WCDMA ( Active Mode) to LTE coverage and re-select to LTE -4/5
60 seconds
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 65
Scenario 3:UE moves from WCDMA ( Active Mode) to LTE coverage and re-select to LTE -5/5
10 seconds In idle state
920ms Re-selection Time
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 66
UE states and transitions between states from UTRAN to LTE
› LTE cell reselection for UEs in CELL_FACH is not specified by 3GPP and is thus not supported.
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 67
TAU Reject
› According to 3GPP Cell Reselection :– In LTE, as in UTRAN, area registration procedures use NAS
signaling. A UE attempting a cell reselection to E-UTRA sends a TA Update (TAU) message to the eNB of the chosen LTE cell and the eNB forwards the TAU message to a chosen MME in the EPC. If the area update procedure is successful the MME replies with a TAU Accept message.
– It is mandatory for a UE in E-UTRA to have a PDN connection (corresponding to a PDP context) defined and this PDN connectionneeds to be retained also when camping in UTRAN. A UE without a PDP context will not be able to make cell reselection to E-UTRA, since the Tracking area update will be rejected
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 68
Tracking Area Update RequestTEMS does not decode the NAS partTEMS does not decode the NAS part -1/3› Example 1:› MS1› Tracking Area Update Request› Time : 02:01:12.53› Vendor Header› Length : 82› Log Code (Hex) : 0xB0ED› HW Timestamp : (57660856.25 ms) 16:01:00.856› 1.25 ms fraction : 0.00› CFN : 28› 1.25 ms counter : 797621808685› Protocol discriminator : (7) EPS mobility management messages› Security Header Type : 0› Message type : 72› NAS Key Set Identifier› TSC : (0) native security context› Key : 0› EPS Update Type› Active Flag : (0) No bearer establishment requested› EPS update type Value : (0) TA updating› GUTI› Length : 11› Odd/even indication : (0) Even number of digits› Type of identity : (6) Reserved› plmn› Mobile country code (MCC) : 505› Mobile network code (MNC) : 01› MMEGroupID : 8786› MMECode : 64› M_TMSI : 4227928385› Message dump (Hex):› 07 48 00 0B F6 05 F5 10 22 52› 40 FC 01 11 41 81 19 22 5B 57› 50 0B F6 05 F5 10 C5 45 40 F0› 03 11 7F 55 FF BF F5 4F 58 04› E0 E0 C0 40 52 05 F5 10 30 25› A1 57 02 00 57 02 00 0000 31 03 E5 C0 24› 00 00 00 00 00 00
›The part highlighted in red here shows that there are no active bearers. i.e. the UE is sending tracking area update with no active bearers.
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 69
Tracking Area Update RequestTEMS does not decode the NAS part TEMS does not decode the NAS part -- 2/32/3
› MS1› Tracking Area Update Reject› Time : 02:01:12.60› Vendor Header› Length : 19› Log Code (Hex) : 0xB0EC› HW Timestamp : (57660977.50 ms) 16:01:00.978› 1.25 ms fraction : 0.00› CFN : 152› 1.25 ms counter : 797621808782› Protocol discriminator : (7) EPS mobility management messages› Security Header Type : 0› Message type : 75› EMM Cause›› Value : (10) Implicitly detachedValue : (10) Implicitly detached› Message dump (Hex):› 07 4B 0A
›The network therefore sends TAU Reject with cause Implicit detach because the UE does not have any bearers active.
Farid Lalzad | Ericsson Internal | 2011-08-12 | Page 70
Tracking Area Update RequestTEMS does not decode the NAS partTEMS does not decode the NAS part -3/3› Tracking Area Update Request› Time : 01:48:57.31› Vendor Header› Length : 84› Log Code (Hex) : 0xB0ED› HW Timestamp : (56925595.00 ms) 15:48:45.595› 1.25 ms fraction : 0.00› CFN : 128› 1.25 ms counter : 797621220476› Protocol discriminator : (7) EPS mobility management messages› Security Header Type : 0› Message type : 72› NAS Key Set Identifier› TSC : (0) native security context› Key : 0› EPS Update Type› Active Flag : (0) No bearer establishment requested› EPS update type Value : (0) TA updating› GUTI› Length : 11› Odd/even indication : (0) Even number of digits› Type of identity : (6) Reserved› plmn› Mobile country code (MCC) : 505› Mobile network code (MNC) : 01› MMEGroupID : 8786› MMECode : 64› M_TMSI : 3825304897
› Message dump (Hex):
› 07 48 00 0B F6 05 F5 10 22 52› 40 E4 01 85 41 80 19 4D 27 DF› 50 0B F6 05 F5 10 C5 45 40 E0› 04 85 55 55 BF 3D E8 A8 58 04› E0 E0 C0 40 52 05 F5 10 30 25› 5C 0A 00 57 02 20 00 31 03 E5› C0 24 00 00 00 00 00 00
In this example you can see active bearers. (20).
But TEMS does not decode it again.