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Transcript of © NASA & Hitachi, Ltd. 2014. All rights reserved. Field Trial and Test Results September 24 th,...
© NASA & Hitachi, Ltd. 2014. All rights reserved.
Field Trial and Test Results
September 24th, 2014
Brian Crowe, Hitachi Communication Technology AmericaRafael Apaza, NASA Glenn Research Center
- With Technical Demonstrations -
Document for ICAO WG-S/6 13-14 November, Sendai, Japan
ACP WG S/6 WP09
© NASA & Hitachi, Ltd. 2014. All rights reserved. 2
1. Outline of Field Trial Results
2. Test Items and Results
3. Security
Contents
4. Future Work
© NASA & Hitachi, Ltd. 2014. All rights reserved.
1. Outline of Field Trial Results
3
© NASA & Hitachi, Ltd. 2014. All rights reserved.NASA/Hitachi Confidential Proprietary
1.1 Outline of the Field Trial Tests
4
Purpose of the Testsa. Research and evaluate AeroMACS MOPS (Minimum Operational Performance
Standards) compliant products utilizing the NASA CNS Test-bedb. Develop recommendation for ICAO (International Civil Aviation Organization)
/SARPs(Standards And Recommended Practices) standardization for safety of flight applications of a wireless communications network on the airport surface that includes both mobile and fixed elements
c. Characterize and analyze path loss in the airport environment and evaluate potential interference with uplinks to mobile satellite systems
Testing Parties: NASA Glenn Research Center, Hitachi, Ltd. & HCTA, Inc.
Testing Schedule: April 14, 2014 – July 31, 2014
Testing Locationsd. Cleveland Hopkins International Airport (CLE)e. NASA Glenn Research Center(GRC) Building110
Outline of Resultsf. Planned test items were all completed with satisfactory data on basic
performance such as throughput (MIMO-A/B), path loss and mobility (incl. Handover) in the real airport environment.
g. Test data analysis is now in process, and the final report will be presented at the next ICNS meeting in April 2015.
© NASA & Hitachi, Ltd. 2014. All rights reserved.NASA/Hitachi Confidential Proprietary
1.2 Area Map and BS/SS Deployment
5
BS
#1A
z=15
deg
Fc=
5100
MH
z
BS#3Az=290degFc=5125MHz
BS#2
Az=250deg
Fc=5120MHz
SSALSF
(2,748m)
SSCMF
(1,585m)
SSTerminal C
(448m)
BS#1~3ARFF
MSINE point
MSARFF2
MSARFF1
GRC/B110
Wireless backhaul
© NASA & Hitachi, Ltd. 2014. All rights reserved. 6NASA/Hitachi Confidential Proprietary
Test items covering the following five categories of testing are a “World’s 1st” from the standpoint of comprehensiveness.
1. Initial Network Entry Test
2. Throughput Test
3. QoS Test
4. Mobility Test
5. Long Term Stability Test
1.3 Field Trial Test Items
© NASA & Hitachi, Ltd. 2014. All rights reserved.NASA/Hitachi Confidential Proprietary
1.4 Field Trial Schedule
7
Month April May June July AugustSeptembe
rOctober November
Milestone
Events
Field Trial Schedule
EquipmentBrought In
Kickoff DEMO
WiMAX Aviation2014@Brussel
WiMAX Aviation2014@Sendai
LaboratoryInstallation
Laboratory Test
Field Deployment
Area Optimization
Field Trial TestsTest Results Analysis
Application Development
Additional Tests
Un-installation
EquipmentShipping
© NASA & Hitachi, Ltd. 2014. All rights reserved.
2. Test Items and Results
8
2.1 Initial Network Entry Test2.2 Throughput Test2.3 QoS Test2.4 Mobility Test2.5 Long Term Stability Test
© NASA & Hitachi, Ltd. 2014. All rights reserved. 9NASA/Hitachi Confidential Proprietary
2.1 Initial Network Entry Test (1/3)
2.1.1 Objectives of the Tests
To validate and prepare recommendations for SARPs(ICAO)
2.1.2 Test Configuration
(1) Initial Network Entry (INE) in single (2) INE in Multiple BS Environment BS environment
BS#1
SubscriberStation
Single BoardComputer
BS#2
MobileStation
LaptopComputer
BS#1 BS#3
Freq.RSSICINR
5100MHz-88dBm
1dB
5120MHz-90dBm
9dB
5125MHz-84dBm
15dB
(3) INE in driving condition on the Runway @ 50 knot
BS#2
MobileStation
LaptopComputer
BS#1 BS#3
(a) 5100MHz Fixed(b) 5 MHz Step(c) 250 kHz Step
(a) 5 MHz Step(b) 250 kHz Step
(a) 5 MHz Step(b) 250 kHz Step
© NASA & Hitachi, Ltd. 2014. All rights reserved. 10NASA/Hitachi Confidential Proprietary
ScanT1
RNG
SBC
PKM
REG
DSA
Sub INE time: T1 This depends on the MS implementation.
Sub INE time: T2 This depends on the environment around MS and BS.
Definition of T1 and T2 Both were proposed by Hitachi and approved by ICAO.
Ranging & Automatic adjustments
Negotiate basic capabilities between MS and BS
Authentication for entering network
MS registration to network
Establish IP connectivity
Operational data exchange
Dynamic Service Flow establishment
MS to scan for DL channel
MS to synchronize to DL of BS
MS to select best channel to synchronize
T2
2.1 Initial Network Entry Test (2/3)
Definition of Initial Network Entry
© NASA & Hitachi, Ltd. 2014. All rights reserved. 11NASA/Hitachi Confidential Proprietary
2.1 Initial Network Entry Test (3/3)
Fixed 5000kHz Step 250kHz Step
Scan 0.16 1.25 23.65
RNG 0.14 0.14 0.14
SBC 0.16 0.14 0.09
PKM 1.2 1.18 1.22
REG 0.13 0.13 0.11
DSA 0.27 0.27 0.3
3
8
13
18
23
28
Average Initial Network Entry time (Terminal C)T
ime
[se
c]
Number of Scan Points 1 11 201
Scan Time/ Number of scan
points0.16 0.11 0.12
T2=1.90
T2=1.86
T2=1.86
93%
7%
2.1.3 Test Results
* 250kHz scan step is the standard value defined in SARPs.
T1= T1= T1=
© NASA & Hitachi, Ltd. 2014. All rights reserved.NASA/Hitachi Confidential Proprietary
Demonstration Time!
12
1. Initial Network Entry
a. Scan Range and Stepsb. Manual and Automaticc. Network Entry
i. Fixedii. 5 MHz Stepiii. 250 kHz Step
© NASA & Hitachi, Ltd. 2014. All rights reserved.NASA/Hitachi Confidential Proprietary
2.2 Throughput Test (1/4)
13
2.2.1 Objectives of the Test
a. To evaluate the basic performance of BS/SS/MS in a real airport environmentb. To obtain path loss datac. To validate the Technical Standard (i.e. Downlink/Uplink Ratio)d. To investigate the applicability of MIMO-A/B
2.2.2 Test Configuration (Ref. p.14 of “NASA/Hitachi AeroMACS Test-bed” for details)
ApplicationServer
Home Agent ASN-GW Base StationSubscriber
StationSingle Board
Computer
Downlink Traffic in UDP/iperf, 10-20 Mbps
Uplink Traffic in UDP/iperf, 5 Mbps
© NASA & Hitachi, Ltd. 2014. All rights reserved. 14NASA/Hitachi Confidential Proprietary
2.2 Throughput Test (2/4)
(1) Single MS/SS Peak Throughput:
7 x 4 x 3 = 84 combinations
- Location Parameters (7 cases) Basic Performance
Hitachi Laboratory (1) Vicinity of Base Stations (near ARFF), per Base Station (3)
Path Loss Effect (Term-C, CMF and ALSF, (3))
- Downlink : Uplink Symbol Ratio (26:21, 29:18, 32:15, 35:12, (4 cases)
- Type of Link (Downlink MIMO-A, Downlink MIMO-B and Uplink, (3 cases))
(2) Round Trip Time: 7 x 4 x 3 = 84 combinations
- Same as above
(3) Multiple MS/SS Sector Throughput: 4 x 4 x 3 = 48 combinations
- Same as above except for excluding Path Loss Effect
- Number of MS = 10 (Hitachi Lab.), 2 (Field Trial)
2.2.3 Test Items
26 21
29 18
32 15
35 12
AeroMACSTDD Frame = 5 msecTotal = 47 Symbols
Downlink UplinkSymbols Symbols
BS
MS/SS
MS/SS
BS
© NASA & Hitachi, Ltd. 2014. All rights reserved.NASA/Hitachi Confidential Proprietary
2.2 Throughput Test (3/4)
15
2.2.4 Single MS/SS Peak Throughput Test Results
(1) BS Basic Capability (Single SS/MS Peak Throughput)
No. Link identificationDownlink : Uplink Symbol Ratio
26:21 29:18 32:15 35:12
1Downlink
MIMO-A 6.1 7.3 8.3 9.2
2 MIMO-B* 11.7 14.9 16.6 19.1
3 Uplink 4.7 3.9 3.1 2.3
(UDP, iperf, BW=5MHz, unit:Mbps)
Transmitter
Receiver
A
Transmitter
Receiver
A
Rx Antenna Diversity[AeroMACS Uplink]
Note) What is MIMO (Multiple Input and Multiple Output)?
Transmitter
Receiver
A
MIMO-A (Space Time Coding)
A -1
Transmitter
Receiver
B
MIMO-B (Spatial Multiplexing)
A
*option
© NASA & Hitachi, Ltd. 2014. All rights reserved.NASA/Hitachi Confidential Proprietary
2.2 Throughput Test (4/4)
16
26:21 29:18 32:15 35:120
1
2
3
4
5
6
7
8
9
10
Hitachi Lab.Term-CCMFALSF
DownlinkMIMO-A
(Mbps)
(2) Path Loss Effect (Single SS/MS Peak Throughput, UDP/iperf)
No.SS Site
Distance to ARFF DL CINR (dB) MCS
1 Term-C 448m 28 64QAM-5/6
2 CMF 1585m 24 64QAM-5/6
3 ALSF 2748m 21 64QAM-2/3
© NASA & Hitachi, Ltd. 2014. All rights reserved.NASA/Hitachi Confidential Proprietary
Demonstration Time!
17
1. EFB Application (Weather Information Access)
2. Pilot – Tower Communication (VoIP)** an optional future capability
3. Airport Surveillance Camera (@Laboratory R310)
© NASA & Hitachi, Ltd. 2014. All rights reserved.NASA/Hitachi Confidential Proprietary
EFB Application (Weather Information Access)
18
BS ASN-GW HA NATserver
WiFirouter
MS
AAA
Tablet
Pilot
WSI weather information to EFB
Weather information - Simulating gathering weather information from “WSI Pilotbrief Optima” site to EFB via
AeroMACS network.
EFB
WSI site
WSI: Weather Services InternationalEFB: Electronic Flight Bag
DNS
Network
© NASA & Hitachi, Ltd. 2014. All rights reserved.NASA/Hitachi Confidential Proprietary
Pilot – Tower Communication (VoIP)
19
BS ASN-GW HA NATserver
WiFirouter
MS
AAA
Laptop
Ground controller
Tablet
Pilot
Directions from control tower to aircraft
Voice over IP (an optional future capability) - Simulating a communication between control tower and aircraft using Skype.
DNS
Network
© NASA & Hitachi, Ltd. 2014. All rights reserved.NASA/Hitachi Confidential Proprietary
Airport Surveillance Camera
20
BS ASN-GW
Webcamera
SS
AAA
Monitoring center
Surveillance video from web camera to monitoring center
Video surveillance - Simulating airport surveillance video between web camera and monitoring center.
Runway/Taxiway
Laptop
HA
© NASA & Hitachi, Ltd. 2014. All rights reserved.NASA/Hitachi Confidential Proprietary
2.3 QoS Test (1/3)
21
2.3.1 What is QoS?
QoS serves for scheduling of the data transfer through QoS-enabled Service Flows according to the established QoS traffic parameters.
No. Name Meaning ApplicationApplication Example(IEEE802.16/MASPS)
1 UGSUnsolicited Grant
ServiceReal-time data with fixed-data-rate
- E1/T1 transport- Circuit switched voice- VoIP without silence suppression
2 rtPSReal-Time Polling
ServiceReal-time data with variable-bit-rates which require guaranteed data rate and delay
MPEG Video
3 nrtPSNon-Real-Time Polling Service
Guaranteed data rate but insensitive to delays
FTP
4 BE Best Effort Service No rate or delay requirements HTTP
5 ertPSExtended-Real-Time
Polling ServiceReal-time data with variable-data-rate which require guaranteed data and delay
VoIP with silence suppression
2.3.2 Objectives of the Tests
To verify the Technical Standard (Network) To validate that a single SS/MS accommodates multiple QoS class communication
links
© NASA & Hitachi, Ltd. 2014. All rights reserved.NASA/Hitachi Confidential Proprietary
2.3 QoS Test (2/3)
22
2.3.3 Test Configuration: How to establish Multiple Service Flows(SF)< Definition of Service Flows >
SBC/SS BS/ASN-GW/HA APPServer
Service Flow #1
Service Flow #3
Service Flow #2
Service Flow #4
Downlink: BE
Downlink: UGS
Uplink: BE
Uplink: UGS
< Description in AAA Configuration file based on WMF Network Architecture> QoS Class is assigned onto port numbers per IP Address (SS/MS) in the AAA configuration file
<IP Address> <Port Number> <QoS Class> <Direction>
Example for upper case <IP Address of SS> < Port Number =5001> <BE> <Downlink> <IP Address of APP Server> < Port Number = 5002> <BE> <Uplink> <IP Address of SS> < Port Number =5003> <UGS> <Downlink> <IP Address of APP Server> < Port Number = 5004> <UGS> <Uplink>
© NASA & Hitachi, Ltd. 2014. All rights reserved.NASA/Hitachi Confidential Proprietary
2.3 QoS Test (3/3)
23
2.3.3 Test Items (1) Multiple Service Flows (4SF) for Single MS/SS: 8 combinations (2) Multiple Service Flows for Multiple MS/SS (a) 4 SFs for 2 MS/SS that are connected to the same BS: 8 combinations (b) 6 SFs for 2 MS/SS that are connected to
the same BS: 8 combinations2.3.4 Test Result Example: 2.3.3(1) UGS + BE (DL)
1801962122282442602762923083243403563723884044204364524680
2
4
6
8
10
12
14
16
UL Packet Error Rate
UGS
BE
Time [sec]
High PER (1)- BE: 8.47 %- UGS: 0 %
18019621222824426027629230832434035637238840442043645246820
22
24
26
28
30
DL CINR
Time [sec]
High PER (2)- BE: 15 %- UGS: 0 %
High PER (3)- BE: 11.17 %- UGS: 0 %
0 34 68 1021361702042382723063403744084424765105445780
1
2
3
UL Throughput
UGS
BE
Time [sec]
BE data start BE data end
[Mbps]
[dB]
[%]
* UL data of UGS is always transferred using QPSK-1/2 which is the most robust MCS class. This is the original design of Hitachi AeroMACS prototype.
© NASA & Hitachi, Ltd. 2014. All rights reserved.NASA/Hitachi Confidential Proprietary
QoS Validation
24
BS ASN-GW
SS#2
AAA
Iperf data (5Mbps from each SS)QoS class: BE
SS#3
SS#1
Iperf data (0.2Mbps)QoS class: UGS
Streaming dataQoS class: BE
UGS data transmitting from SS#1 to Laptop#2 is guaranteed during other big BE data is transmitting.
HA
LET IT BE♪
Laptop#3
Laptop#2
Laptop#1
BE: Best EffortUGS: Unsolicited Grant Service
Quality of Service
© NASA & Hitachi, Ltd. 2014. All rights reserved.NASA/Hitachi Confidential Proprietary
Demonstration Time!
25
1. QoS Validation (Video Demo)
2. QoS Demonstration (@Laboratory R310)
© NASA & Hitachi, Ltd. 2014. All rights reserved. 26NASA/Hitachi Confidential Proprietary
2.4 Mobility Test (1/3)
2.4.1 Objectives of the Tests
To identify the area where AeroMACS communication is available To obtain Path Loss data by measuring the radio field of the airport To demonstrate handover between base stations in a real airport environment
2.4.2 Test Configuration
(1) Path Loss Measurement & (2) Handover Performance on Runway & CINR/RSSI Distribution Map Peak Throughput at Driving Condition Generation @ 50 knot
BS#2
MobileStation
LaptopComputer
BS#1 BS#3 BS#2
MobileStation
LaptopComputer
BS#1
Without neighbor information With neighbor information
© NASA & Hitachi, Ltd. 2014. All rights reserved.NASA/Hitachi Confidential Proprietary
2.4 Mobility Test (2/3)Handover on the Runway: Southwestward
27
HandoverPoint
HandoverPoint
BS#1&BS#2
Handover: Success (Controlled Handover) @ Runway 24L/24R Speed: >50 knot Direction: Southwestward Handover Latency: 160 – 200 msec.
© NASA & Hitachi, Ltd. 2014. All rights reserved.NASA/Hitachi Confidential Proprietary
2.4 Mobility Test (3/3)Handover on the Runway: Northeastward
28
HandoverPoint
HandoverPoint
BS#1&BS#2
Handover: Success (Controlled Handover) @ Runway 6R/6L Speed: >50 knot Direction: Northeastward Handover Latency: 160 – 200 msec.
© NASA & Hitachi, Ltd. 2014. All rights reserved.NASA/Hitachi Confidential Proprietary
Handover on the Runway (CLE)
29
BS#2 ASN-GW HA
AAA
Runway
Handover
Handover (Pre-recorded)
BS#1
MS MS
50 knot
Controlled Handover is successfully executed from BS#1 to BS#2 during running at 50 knot on runway.
© NASA & Hitachi, Ltd. 2014. All rights reserved.NASA/Hitachi Confidential Proprietary
Demonstration Time!
30
1. Handover on the Runway (CLE)
© NASA & Hitachi, Ltd. 2014. All rights reserved.NASA/Hitachi Confidential Proprietary
2.5 Long Term Stability Test (1/4)
31
2.5.1 Objectives of the Tests
To verify BS Holdover functionality after Loss of GPS Signal To check the blockage of the wireless communication link by the airplane To obtain Rain/Fog/Snow attenuation effect data To check the stability of the system working in a real airport environment
2.5.2 Test Items
(1) BS Frequency & Time Stability without GPS Signal
(2) Blockage Effects by Airplanes
(3) Rain Attenuation
(4) Interference between Adjacent Channels using Different DL:UL Symbol Ratios
(5) Observation of System Performance
© NASA & Hitachi, Ltd. 2014. All rights reserved.NASA/Hitachi Confidential Proprietary
2.5 Long Term Stability Test (2/4)
32
Frequency error was maintained within 100 Hz for 24 hours.
0 4 8 12 16 20 24-200
-100
0
100
200
Time after loss of GPS [hours]
Fre
qu
en
cy
Err
or
[Hz]
Timing Offset was maintained within 400 ns for 24 hours.
0 4 8 12 16 20 24-1000
-500
0
500
1000
Time after loss of GPS [hours]
1 P
PS
Inte
rva
l Err
or
[ns
ec
]
2.5.3 Test Results
(1) BS Frequency & Time Stability without GPS Signal
© NASA & Hitachi, Ltd. 2014. All rights reserved.NASA/Hitachi Confidential Proprietary
2.5 Long Term Stability Test (3/4)
33
View from SS (@CMF)
BS (@ARFF)B737@Kilo
E190@Golf
B737@Kilo
CRJ700@24R
CRJ700@24R
B737@24R
B737@24R
E190@24R
B737@Golf
VideoSurveillance
Started
© NASA & Hitachi, Ltd. 2014. All rights reserved.NASA/Hitachi Confidential Proprietary
2.5 Long Term Stability Test (4/4)
34
(2) Blockage Effects by Airplanes between ARFF and CMF
View from SS (@CMF)
BS (@ARFF)B737@Kilo
E190@Golf
B737@Kilo
CRJ700@24R
CRJ700@24R
B737@24R
B737@24R
E190@24R
B737@Golf
VideoSurveillance
Started
© NASA & Hitachi, Ltd. 2014. All rights reserved.
3. Security
35
© NASA & Hitachi, Ltd. 2014. All rights reserved.NASA/Hitachi Confidential Proprietary
3. Security Results
36
3.1 Hitachi SS’s access to Alvarion BS
Hitachi Mobile Station (when it was located near ARFF) found Alvarion BS after scan at the INE as the most favorable one
It tried to enter the network via Alvarion BS but couldn’t do so because the Alvarion AAA rejected.
. 3.2 Alvarion SS’s access to Hitachi BS
Alvarion Subscriber Station found Hitachi BS after scan (the output power of the Alvarion BS is now lowered to 1dBm).
It is still trying to enter the network via Hitachi BS but can’t do so because Hitachi AAA keeps on rejecting.
© NASA & Hitachi, Ltd. 2014. All rights reserved.
4. Future Work
37
© NASA & Hitachi, Ltd. 2014. All rights reserved.NASA/Hitachi Confidential Proprietary
4. Future Work
38
4.1 Tests Using Another Subscriber Station
Outdoor Type Subscriber Station is coming soon. Basic Performance will be examined in the Airport environment.
. 4.2 Extended Tests with FAA
Details are under discussion
4.3 Final Report Presentation
Final Report will be presented at the next ICNS Conference in April 2015.
© NASA & Hitachi, Ltd. 2014. All rights reserved.NASA/Hitachi Confidential Proprietary
Acronyms(1/2)
39
16QAM 16 Quadrature Amplitude Modulation64QAM 64 Quadrature Amplitude ModulationAAA Authentication, Authorization and AccountingAeroMACS Aeronautical Mobile Airport Communications SystemALSF Approaching Lights and Sequenced Flashing lightsAM(R)S Aeronautical Mobile satellite (Route) ServiceAPP ApplicationASN Access Service NetworkARFF Aircraft Rescue and Fire FightingATC Air Traffic ControlBS Base StationCLE Cleveland Hopkins International AirportCMF Consolidated Maintenance FacilityCSN Connectivity Service NetworkDL DownlinkDNS Domain Name SystemEFB Electronic Flghit BagertPS extended-real-time Polling ServiceFAA Federal Aviation Administration GPS Global Positioning SystemGRC Glenn Research Center (NASA)GW GatewayHA Home AgentHCTA Hitachi Communication Technologies America, Inc.ICAO International Civil Aviation OrganizationICNS integrated Communications, Navigation, and Surveillance
© NASA & Hitachi, Ltd. 2014. All rights reserved.NASA/Hitachi Confidential Proprietary
Acronyms(2/2)
40
INE Initial Network EntryIP Internet ProtocolMIMO Multiple Input and Multiple OutputMS Mobile Station MOPS Minimum Operational Performance StandardsNASA National Aeronautics and Space Administration NAT Network Address TranslationnrtPS non-real-time Polling ServiceOFDMA Orthogonal Frequency Division Multiple AccessOMC Operation and Maintenance CenterQoS Quality of ServiceQPSK Quadrature Phase Shift KeyingrtPS real-time Polling ServiceSARPs Standards And Recommended PracticesSBC Single Board ComputerSF Service FlowSM Spatial MultiplexingSS Subscriber StationSTC Space Time CodingTDD Time Division DuplexUDP User Datagram ProtocolUGS Unsolicited Grant ServiceUL UplinkV.S.W.R Voltage Standing Wave RatioWMF WiMAX ForumWSI Weather Services International
© NASA & Hitachi, Ltd. 2014. All rights reserved.
Field Trial and Test Results
September 24th, 2014
Toshihide Maeda, Hitachi, Ltd.Rafael Apaza, NASA Glenn Research CenterWilliam D. Ivancic, NASA Glenn Research Center
END
41
© NASA & Hitachi, Ltd. 2014. All rights reserved.
Backup Slides for Q&A
43
© NASA & Hitachi, Ltd. 2014. All rights reserved.NASA/Hitachi Confidential Proprietary
BS#1: RSSI
44
BS#1BS#2BS#3
© NASA & Hitachi, Ltd. 2014. All rights reserved.NASA/Hitachi Confidential Proprietary
BS#2: RSSI
45
BS#1BS#2BS#3
© NASA & Hitachi, Ltd. 2014. All rights reserved.NASA/Hitachi Confidential Proprietary
BS#3: RSSI
46
BS#1BS#2BS#3
© NASA & Hitachi, Ltd. 2014. All rights reserved.NASA/Hitachi Confidential Proprietary
BS#1: CINR
47
BS#1BS#2BS#3
© NASA & Hitachi, Ltd. 2014. All rights reserved.NASA/Hitachi Confidential Proprietary
BS#2: CINR
48
BS#1BS#2BS#3
© NASA & Hitachi, Ltd. 2014. All rights reserved.NASA/Hitachi Confidential Proprietary
BS#3: CINR
49
BS#1BS#2BS#3
© NASA & Hitachi, Ltd. 2014. All rights reserved.NASA/Hitachi Confidential Proprietary
Interference between Adjacent Channels using Different Symbol Ratio
50
5095 5100 5105 5110 5115 5120 5125 5130 5135NASA
BTS1-1BS#1 NASA
BTS2-1Not
UsedNASA
BTS2-3BS#2 BS#3 NASA
BTS2-2NASA
BTS1-2
[MHz]
Case-2 (20MHz) Case-1 (5MHz)
No.DL:UL Symbol Ratio BS#2 (ALSF) BS#3 (CMF)
BS#2 BS#3 DL UL DL UL
1 26:21 26:21 No Effect No Effect No Effect No Effect
2 26:21 29:18 No Effect No Effect No Effect No Effect
3 26:21 32:15 No Connection No Connection No Effect No Effect
4 26:21 35:12 No Connection No Connection No Effect No Effect
No.DL:UL Symbol Ratio BS#1 (Terminal-C) BS#3 (CMF)
BS#2 BS#3 DL UL DL UL
1 26:21 26:21 No Effect No Effect No Effect No Effect
2 26:21 29:18 No Effect No Effect No Effect No Effect
3 26:21 32:15 No Effect No Effect No Effect No Effect
4 26:21 35:12 No Effect No Effect No Effect No Effect
Case-1) 5 MHz Separation
Case-2) 20 MHz Separation
26 21
29 18
32 15
35 12
AeroMACSTDD Frame = 5 msecTotal = 47 Symbols
Downlink UplinkSymbols Symbols
© NASA & Hitachi, Ltd. 2014. All rights reserved.NASA/Hitachi Confidential Proprietary
Rain Attenuation: Weather Data
51
Tested Date: June 18, 2014 Observed Event: Thunderstorm and Rain 18:35-19:47EDT Used BS & MS: BS#3 (5,125MHz) / SS(CMF) & SS(ALSF) Weather History:
Radar
Time (EDT) Temperature Sensible Temperature
Dew-Point Temperature
Humidity Atmospheric Pressure
Visibility Wind Direction
Wind Velocity Velocity of Gust Wind
Precipitation Event Weather
5:51 PM 25.6 °C - 20.0 °C 71% 1014.6 hPa 12.9 km NNE 18.5 km/h / 5.1 m/s - N/A Cloudy6:35 PM 27.2 °C 28.9 °C 20.6 °C 67% 1016.1 hPa 12.9 km WSW 13.0 km/h / 3.6 m/s - N/A Thunderstorm Thunderstorm
6:44 PM 25.6 °C - 19.4 °C 68% 1017.5 hPa 9.7 km W 63.0 km/h / 17.5 m/s 85.2 km/h / 23.7 m/s 0.0 mm Rain,Thunderstorm Thunderstorm, Rain
6:46 PM 24.0 °C - 19.0 °C 73% 1017.5 hPa 1.2 km W 51.9 km/h / 14.4 m/s 85.2 km/h / 23.7 m/s 0.0 mm Rain,Thunderstorm Thunderstorm (Extreme), Rain
6:51 PM 21.1 °C - 19.4 °C 90% 1016.8 hPa 1.2 km WNW 38.9 km/h / 10.8 m/s 85.2 km/h / 23.7 m/s 5.8 mm Rain,Thunderstorm Thunderstorm (Extreme), Rain
6:55 PM 20.6 °C - 18.9 °C 90% 1017.2 hPa 4.8 km WNW 44.4 km/h / 12.3 m/s 59.3 km/h / 16.5 m/s 2.8 mm Rain,Thunderstorm Thunderstorm (Weak), Rain
6:58 PM 20.6 °C - 18.3 °C 87% 1017.2 hPa 4.8 km NW 37.0 km/h / 10.3 m/s 59.3 km/h / 16.5 m/s 3.8 mm Rain,Thunderstorm Thunderstorm, Rain
7:08 PM 21.1 °C - 19.4 °C 90% 1016.8 hPa 4.8 km NNW 29.6 km/h / 8.2 m/s 42.6 km/h / 11.8 m/s 4.6 mm Rain,Thunderstorm Thunderstorm (Weak), Rain
7:47 PM 21.0 °C - 19.0 °C 88% 1016.5 hPa 16.1 km E 13.0 km/h / 3.6 m/s - 4.8 mm Cloudy7:51 PM 20.6 °C - 18.3 °C 87% 1016.2 hPa 16.1 km E 9.3 km/h / 2.6 m/s - 4.8 mm Cloudy8:51 PM 20.6 °C - 18.9 °C 90% 1014.7 hPa 14.5 km ESE 11.1 km/h / 3.1 m/s - 0.5 mm Rain Light Rain9:51 PM 20.6 °C - 18.9 °C 90% 1015.9 hPa 16.1 km E 11.1 km/h / 3.1 m/s - 0.0 mm Mostly Cloudy
Ref.) http://www.wunderground.com/history/airport/KCLE/2014/6/18/DailyHistory.html?req_city=NA&req_state=NA&req_statename=NA&MR=
18:00 19:00 20:00
CLE CLE CLE
© NASA & Hitachi, Ltd. 2014. All rights reserved.NASA/Hitachi Confidential Proprietary
Rain Attenuation: Obtained Data (DL)
52
20
14
/6/1
8 1
8:2
4:5
9
20
14
/6/1
8 1
8:2
9:5
9
20
14
/6/1
8 1
8:3
4:5
9
20
14
/6/1
8 1
8:3
9:5
9
20
14
/6/1
8 1
8:4
4:5
9
20
14
/6/1
8 1
8:4
9:5
9
20
14
/6/1
8 1
8:5
4:5
9
20
14
/6/1
8 1
8:5
9:5
9
20
14
/6/1
8 1
9:0
4:5
9
20
14
/6/1
8 1
9:0
9:5
9
20
14
/6/1
8 1
9:1
4:5
9
20
14
/6/1
8 1
9:1
9:5
9
20
14
/6/1
8 1
9:2
4:5
9
20
14
/6/1
8 1
9:2
9:5
9
20
14
/6/1
8 1
9:3
4:5
9
20
14
/6/1
8 1
9:3
9:5
9
20
14
/6/1
8 1
9:4
4:5
9
20
14
/6/1
8 1
9:4
9:5
9
20
14
/6/1
8 1
9:5
4:5
9
20
14
/6/1
8 1
9:5
9:5
9
20
14
/6/1
8 2
0:0
4:5
920.0 20.5 21.0 21.5 22.0 22.5 23.0 23.5 24.0 24.5 25.0
DL_CINR 10sec Average with 1min moving Average [dB]
Thunderstorm Arrived
Thunderstorm Gone
2014/6
/18 1
8:2
4:5
9
2014/6
/18 1
8:2
9:5
9
2014/6
/18 1
8:3
4:5
9
2014/6
/18 1
8:3
9:5
9
2014/6
/18 1
8:4
4:5
9
2014/6
/18 1
8:4
9:5
9
2014/6
/18 1
8:5
4:5
9
2014/6
/18 1
8:5
9:5
9
2014/6
/18 1
9:0
4:5
9
2014/6
/18 1
9:0
9:5
9
2014/6
/18 1
9:1
4:5
9
2014/6
/18 1
9:1
9:5
9
2014/6
/18 1
9:2
4:5
9
2014/6
/18 1
9:2
9:5
9
2014/6
/18 1
9:3
4:5
9
2014/6
/18 1
9:3
9:5
9
2014/6
/18 1
9:4
4:5
9
2014/6
/18 1
9:4
9:5
9
2014/6
/18 1
9:5
4:5
9
2014/6
/18 1
9:5
9:5
9
2014/6
/18 2
0:0
4:5
90E+00
1E+06
2E+06
3E+06
4E+06
5E+06
6E+06
7E+06
8E+06
9E+06DL_MAC SDU Throughput Moving Average [bps]
Thunderstorm Arrived
Thunderstorm Gone
: Departure:Arrival
: Departure:Arrival
© NASA & Hitachi, Ltd. 2014. All rights reserved.NASA/Hitachi Confidential Proprietary
Round Trip Time
5353
Single MS/SS Round Trip Time ( QoS = BE)
No. Location BS IDTerminal
(Antenna Gain)
Round Trip Time [msec]DL:UL Symbol Ratio
26:21 29:18 32:15 35:12
1 Terminal C BS#1 SS (19dBi) 101 102 102 101 2 ALSF BS#2 SS (19dBi) 101 102 102 98 3 CMF BS#3 SS (19dBi) 100 99 101 100
RF Backhaul
PC MS BSMicroWave
SWASN-GW
SW HAMicroWave
SWSW
Round Trip Time
ping
L3SW
Hitachi AeroMACS components
Hitachi other equipment
NASA equipment
Round Trip Time means the time from transmission to reception of a ping command.
APL-SV
Round Trip Time Measurement Configuration
No. QoS Class Average Round Trip Time [msec]1 UGS 332 ertPS 463 rtPS 604 nrtPS 1015 BE 103
Single MS/SS Round Trip Time ( for each QoS class)
© NASA & Hitachi, Ltd. 2014. All rights reserved.NASA/Hitachi Confidential Proprietary
QoS Test Observation: Round Trip Time
5454
BR Ranging code (CDMA code)
UL-MAP(CDMA Allocation IE)
BW request
UL-MAP(Granted IE)
Data
Excluded in rtPS
Excluded in UGS or ertPS
SS BS
Following figure shows the sequence between SS and BS. Some of these processes are excluded for some QoS classes and consequently it make the Round Trip Time shorter. This sequence and QoS class algorithm are defined in the WiMAX Technical Standard.
QoS Data storing algorithm