Date post: | 20-Dec-2015 |
Category: |
Documents |
Upload: | husmanafper3 |
View: | 34 times |
Download: | 6 times |
1 © Nokia Siemens Networks
LTE/SAE Trial ResultsEtisalat UAE
Nokia Siemens Networks LTE Trial TeamJuly 2010, Dubai UAE
2 © Nokia Siemens NetworksLTE Trial for Etisalat – Test results Customer Confidential
Contents• Network Configuration• Coverage Plot based on drive test• Single User Throughput• Sector Throughput• Latency• Mobility: cell reselection and Handover
• Link Budget• Annex: eNB automatic neighbors list creation
3 © Nokia Siemens NetworksLTE Trial for Etisalat – Test results Customer Confidential
Network Configuration
4 © Nokia Siemens NetworksLTE Trial for Etisalat – Test results Customer Confidential
Coverage Plot Based on Drive Test
5 © Nokia Siemens NetworksLTE Trial for Etisalat – Test results Customer Confidential
Condition:• One UE with TCP Downlink application• Only site 4106 is unlocked, the other sites are locked• TX power was set as 60 watt• Logging with XCAL Drive Test tool
6 © Nokia Siemens NetworksLTE Trial for Etisalat – Test results Customer Confidential
Serving Cells Plot
7 © Nokia Siemens NetworksLTE Trial for Etisalat – Test results Customer Confidential
RSRP Coverage Plot (dBm)
8 © Nokia Siemens NetworksLTE Trial for Etisalat – Test results Customer Confidential
SINR Coverage Plot (dB)
9 © Nokia Siemens NetworksLTE Trial for Etisalat – Test results Customer Confidential
Downlink Throughput (Mbps)
10 © Nokia Siemens NetworksLTE Trial for Etisalat – Test results Customer Confidential
Single User Throughput
11 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
The objective of the test is to verify the capability of the LTE air interface to provide DL and UL throughput for a single user in different radio conditions with different application protocols
• Application protocols– TCP (DL/UL)– UDP (DL/UL)
• DL antenna configuration– 2 x 2 DL Adaptive OL MIMO
• Radio conditions– stationary
• UE is LTE category 3 Samsung device (Throughput is limited 100/50 Mbps (DL/UL))
• UE device providing 1 second measurement period to Xcal LTE tool
Single User Throughput – Test Scenario
12 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Single User Throughput ‐ TCP Downlink• Average RSRP : ‐70.71 dBm, Average SINR : 27.67 dB• DL average throughput : 90.16Mbps• DL peak throughput : 101.1 Mbps *
* UE device providing 1 second measurement period to Xcal LTE tool
13 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
• Average RSRP : ‐69.74 dBm, Average SINR : 26.76dB (Both measured in DL)• UL average throughput : 36.50Mbps• UL peak throughput : 40.48 Mbps
Single User Throughput ‐ TCP Uplink
14 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
• Average RSRP : ‐65.35 dBm, Average SINR : 26.24 dB• DL average throughput : 93.90Mbps• DL peak throughput : 102.11 Mbps *
Phy DL TP(Mbps)
0
20
40
60
80
100
120
17:1
5:10
.354
17:1
5:16
.052
17:1
5:21
.358
17:1
5:27
.355
17:1
5:32
.356
17:1
5:37
.357
17:1
5:43
.052
17:1
5:48
.358
17:1
5:53
.359
17:1
5:58
.360
17:1
6:03
.362
17:1
6:09
.052
17:1
6:14
.360
17:1
6:20
.361
17:1
6:25
.362
17:1
6:30
.362
17:1
6:35
.364
17:1
6:40
.364
17:1
6:46
.365
17:1
6:53
.052
17:1
6:58
.366
Phy DL TP(Mbps)
Single User Throughput ‐ UDP Downlink
* UE device providing 1 second measurement period to Xcal LTE tool
15 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
• Average RSRP : ‐69.39 dBm, Average SINR : 26.92 dB (Both Measured in DL)• UL average throughput : 35.94Mbps• UL peak throughput : 38.76 Mbps
Single User Throughput – UDP Uplink
16 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Single User Throughput ‐ TCP Downlink Summary
Measured Radio condition
Reference
17 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Single User Throughput ‐ TCP Uplink Summary
* RSRP & SINR measured in DL
Measured Radio condition
Reference
18 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Single User Throughput ‐ UDP Downlink Summary
Measured Radio condition
Reference
19 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Single User Throughput ‐ UDP Uplink Summary
* RSRP & SINR measured in DL
Measured Radio condition
ReferencePoor condition was not achieved during the test due to sudden increase in
the SINR during testing session
20 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Sector Throughput
21 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Objectives & Conditions •Sector throughput – Scenario A.1
– Four UEs placed stationary in excellent radio conditions– TCP DL/UL traffic (FTP)– Cell capacity is the aggregated physical layer throughput from each UE
•Sector Throughput – Scenario A.2– Four UEs placed stationary in good radio conditions– TCP DL/UL (FTP)– Cell capacity is the aggregated physical layer throughput from each UE
• Sector throughput – Scenario B– Two UEs placed stationary in good radio conditions, one in average and one in poor radio conditions– TCP DL/UL traffic (FTP)– Cell capacity is the aggregated physical layer throughput from each UE
•Sector throughput – Scenario C– Three UEs placed stationary in good radio conditions and one UE mobile (from good to average and poor,
then back to good)– TCP DL/UL traffic (FTP)– Cell capacity is the aggregated physical layer throughput from each UE
22 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Sector Throughput Downlink Direction
23 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Scenario A.1 ‐ TCP DL Results • Two Stationary UEs in Excellent Radio Condition and another two stationary UEs in Good radio condition• UEs Synchronized with NTP server before the test and results aggregated with time stamps to get sector
throughput• Average Sector Throughput 118.1 Mbps• Peak Sector Throughput 142.76 Mbps
Measured Radio conditionReference
24 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Scenario A.2 ‐ TCP DL Results • Four Stationary UEs in Good Radio Conditions• UEs Synchronized with NTP server before the test and results aggregated with time stamps to get sector
throughput• Average Sector Throughput 78.25 Mbps• Peak Sector Throughput 95.66 Mbps
Measured Radio conditionReference
25 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Scenario B ‐ TCP DL Results • UE1 in Average RF, UE2 in Poor RF, UE3 & UE4 in Good RF• UEs Synchronized with NTP server before the test and results aggregated with time stamps to get sector
throughput• Average Sector Throughput 61.73 Mbps• Peak Sector Throughput 99 Mbps
Measured Radio conditionReference
26 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Scenario C - TCP DL Results 1/2• UE1, UE3, UE4 in Good RF. UE2 is mobile moving from Good RF to Average and to Poor then return back to Good• UEs Synchronized with NTP server before the test and results aggregated with time stamps to get sector
throughput• Average Sector Throughput 105.05 Mbps• Peak Sector Throughput 118.1 Mbps
Measured Radio conditionReference
27 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Scenario C - TCP DL Results 2/2• GIS Plot of Moving UE2 can be seen as below
28 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Sector Throughput Uplink Direction
29 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Scenario A.1 ‐ TCP UL Results • Two Stationary UEs in Excellent Radio Condition and another two stationary UEs in Good radio condition• UEs Synchronized with NTP server before the test and results aggregated with time stamps to get sector
throughput• Average Sector Throughput 34.87 Mbps• Peak Sector Throughput 43.98 Mbps
Measured Radio conditionReference
30 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Scenario A.2 ‐ TCP UL Results • Four Stationary UEs in Good Radio Conditions• UEs Synchronized with NTP server before the test and results aggregated with time stamps to get sector
throughput• Average Sector Throughput 24.06 Mbps• Peak Sector Throughput 32 Mbps
Measured Radio conditionReference
31 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Scenario B ‐ TCP UL Results • UE1 in Average RF, UE2 in Poor RF, UE3 & UE4 in Good RF• UEs Synchronized with NTP server before the test and results aggregated with time stamps to get sector
throughput• Average Sector Throughput 21.11 Mbps• Peak Sector Throughput 32.2 Mbps
Measured Radio conditionReference
32 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Scenario C - TCP UL Results 1/2• UE1, UE3 and UE4 are in excellent or good RF, UE2 is mobile from good to average and poor RF• UEs Synchronized with NTP server before the test and results aggregated with time stamps to get sector
throughput• Average Throughput 18.6 Mbps• Peak Throughput 32.5 Mbps
Measured Radio conditionReference
33 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Scenario C - TCP UL Results 2/2• GIS Plot of Moving UE2 can be seen as below
34 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Latency
35 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Objectives & Conditions •Objective:
Measure the control plane signaling processing time and the end-to-end user plane delay, i.e. Round Trip Time (RTT). Tests will be executed in the field at good SINR conditions.
• Control plane:– Location in field: stationary UE’s in the target cell at good SINR locations– Signaling procedures: UE Attach, Radio Bearer Setup and UE Detaches from active state
• User plane:– Location in field: stationary UE’s in the target cell at good SINR locations– Ping application server with 32Bytes, 1000Bytes, 1500Bytes with 100 pings session
36 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Control Plane Latency – Attach & Bearer Setup
29 ms
5 ms
116 ms
5 ms
Total time for UE to attach (EMM-registered) and setup default bearer (ECM-Connected) takes around 155 ms (including UE processing delay).
37 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Control Plane Latency – UE Detach
46 ms
1 ms
Total time of UE detach from active state takes around 47 ms.
38 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
User Plane Latency-32Bytes Ping
Average: 11msMinimum: 10msMaximum: 33ms
39 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
User Plane Latency-1000Bytes PingAverage: 23msMinimum: 19msMaximum: 38ms
40 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
User Plane Latency-1500Bytes PingAverage: 27msMinimum: 21ms Maximum: 57ms
41 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
User Plane Latency - Summary
11
2327
0
10
20
30
40
50
60
Average Minimum Maximum
RTT (m
s)
32B 1000B 1500B
42 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Mobility: Cell Re-selection
43 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Objectives & Conditions •Objective:
Verify that cell reselection happens within the conditions set by the parameters.
•Parameters:– Sintrasearch– qrxlevmin– qoffset– qhyst– Treselection
44 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Cell reselection Process
UE will start to measure intra frequency neighbors when Rx level of serving cell is below sum of Sintrasearch + qrxlevmin. Cell reselection will happen when Rn > Rs within Treselection timer period.
45 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Cell Reselection Result
UE camp on cell 100. When the RSRP of cell 101 is 3dB (qoffset + qhyst) higher than cell 100 then cell reselection is triggered if this condition is fulfilled for 2 seconds (Treselection).
BCCH-DL SCH information list cell 101 as neighbor for cell 100
46 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Mobility: Handover
47 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Objectives & Conditions •Objective:
Verify functionality of intra-eNodeB and inter eNodeB triggered by the event A3 (better cell HO) and A5 (handover threshold based on RSRP measurements).
• Application:TCP IP DL and UL
• Location:UE performing intra/inter eNodeB handover from serving to target cell/target eNodeB
• Vehicle Speed:The range of speed during the handover tests was between 30 to 60 Kph
48 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Mobility and Handover – ConditionThe successful handover was determined by verifying the following messagesequence:
• Measurement Report sent from UE to source cell.– Event A3: Neighbouring Cell becomes better than Serving Cell.– Event A5: Serving becomes worse than threshold1 and neighbor becomes better than
threshold2• RRCConnectionReconfiguration message including MobilityControlInfo sent
by a source cell to UE.• RRCConnectionReconfigurationComplete sent from UE received by a target
cell
The control plane interruption time was determined by calculating:• The time from a UE receiving the RRCConnectionReconfiguration message
in the source cell to sending the RRCConnectionReconfigurationCompletemessage in the target cell.
49 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Mobility and Handover – Intra eNodeB time
Total time from measurement report to handover: 64 ms (in average)
35 ms
29 msHandover complete
Handover command
50 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Handover Events Identification
In rrcConnectionReconfigurationmessage for measurement configuration, eNodeB sent reportConfigId identifier. In the measurementReport message, measId identifier refer to the handover event: - measId 1 = event A3 - measId 2 = event A5 - measId 3 = event A2
51 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Handover procedure triggered by event A3
52 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Mobility and Handover – Intra eNodeB with A3 HO trigger
Serving cell RSRP = 49,i.e. -140 + 52 = -91 dBm
Target cell RSRP = 52,i.e. -140 -52 = -88 dBm
The Event A3 reporting threshold condition (eNB parameter: a3Offset = 3 dB) is fulfilled and the UE sends handover measurement report to the serving eNodeB. The intra eNodeB handover from Cell ID 102 to Cell ID 100 is executed.
53 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Handover procedure triggered by event A5
54 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Mobility and Handover – Intra eNodeB with A5 HO trigger
In order to perform HO with A5 trigger, A3offset has been changed to avoid HO due to A3 (15 dB). Based on measurement report, it is showing that UE was served by cell 100. And measure cell 101 as target when serving cell below A5 threshold (set by parameter was -80 dBm) and decided to HO since the target is better than -77 dBm (set by parameter) after time to trigger is achieved.
Serving cell RSRP = 49,i.e. -130 + 49 = -81 dBm
Target cell RSRP = 54,i.e. -130 -54 = -76 dBm
55 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Intra eNodeB Handover – DL Throughput Impact (1 of 2)
Handovers were performed from cell ID 102 to 100, 100 to 101 and 101 to 102. During the handover, there is no throughput gap. Fluctuations in throughput are due to SINR during mobile test.
Number of Handover attempts were 14, 7 in clockwise and 7 in counterclockwise,
Handovers with 100% success rate
56 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Intra eNodeB Handover– DL Throughput Impact (2 of 2)
Fluctuation of throughput during handover is due to SINR. There is no gap throughput during handover.
57 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Intra eNodeB Handover– UL Throughput Impact (1 of 2)
Handovers were performed from cell ID 101 to 102, 102 to 100 and 100 to 101. During the handover, there is no throughput gap. Fluctuations in throughput are due to SINR.
Number of Handover attempts were 16, 8 in clockwise and 8 in counterclockwise,
Handovers with 100% success
58 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Intra eNodeB Handover– UL Throughput Impact (2 of 2)
Fluctuation of throughput during handover is due to SINR. There is no gap throughput during handover.
59 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Mobility and Handover – Inter eNodeB
Total time from measurement report to handover: 83 ms (in average)
53 ms
30 msHandover complete
Handover command
60 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Mobility and Handover – Inter eNodeB
Serving cell RSRP = 55,i.e. -130 + 55 = -75 dBm
Target cell RSRP = 58,i.e. -130 -58 = -72 dBm
UE was originally camping to cell 401 belong to site 2549. Due to A3 HO trigger, UE handover to cell 100 belong to site 4106.
61 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Inter eNodeB Handover– DL Throughput Impact (1 of 2)
Handovers were performed between cells ID 100 to 202 and 400. During the handover, there is no throughput gap. Fluctuations in throughput are due to SINR (see next slide). Speed was between 30 and 60 Kph.
Number of Handover attempts is 20, Handovers with 100% success rate
62 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Inter eNodeB Handover– DL Throughput Impact (2 of 2)
63 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Inter eNodeB Handover– UL Throughput Impact (1 of 2)
Handovers were performed between cells ID 100 to 202 and 400. During the handover, there is no throughput gap. Fluctuations in throughput are due to SINR (see next slide). Speed was between 30 and 60 Kph.
Number of Handover attempts is 16, Handovers with 100% success rate
64 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Inter eNodeB Handover– UL Throughput Impact (2 of 2)
65 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Link Budget
66 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Link Budget – Test Scenario• Objective:
To show relation between achieved throughput with SINR and RSRP
• Application:TCP IP downlink and uplink
• Location:One UE using applications (TCP DL, TCP UL) move from good SINR to cell edge (poor SINR) for antenna configuration (adaptive OL MIMO DL), without interference (all neighboring cells with 0% load). Cell edge will be searched and the UE will be moving along the predicted cell edge to have statistically reliable results
67 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Link budget – RSRP versus DL throughput
68 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Link budget – SINR versus DL throughput
69 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Link budget – RSRP versus UL throughput
70 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Link budget – SINR versus UL throughput
71 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Annex: eNB automatic neighbors list creation 1/1
During commissioning of the eNB, only the IP address of the neighbor eNB is required. After the eNB has setup the X2 interface with the neighbor eNB, then it will exchange all necessary information of neighbor cells. That information is stored in the eNBcommissioning file (see next slide)
Extract of a commissioning file after the eNBpopulated it’s cell neighbor list.
72 © Nokia Siemens Networks
LTE Trial for Etisalat – Test results Customer Confidential
Annex: eNB automatic neighbors list creation 2/2
Extract of a commissioning file after the eNB populated it’s cell neighbor list.