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ABSTRACT: This contribution provides performance results of UMB (Ultra Mobile Broadband) system. In addition, the EMAH (Evaluation Methodology Ad-Hoc) activities for the UMB characterization are also summarized in this contribution.
RECOMMENDATION: Review and adopt for the submission from TSG-C
A. Examples of link level simulation results B. System level simulation results for calibrationC. Backup slides for simulation results under NGMN setup
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Introduction
Standardization of UMB system March 2006 to February 2007: Decision of framework and components April, 2007: Publication of UMB Air Interface Specification Version 1.0 May to August, 2007: Revision of UMB Air Interface Specification September, 2007: Publication of UMB Air Interface Specification Version
2.0
However, UMB characterization has not been completed yet …
Necessity of Performance evaluation for UMB system!
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Background (1)~ History on Activities for Performance Evaluation of UMB ~
History: June, 2007: agreed upon to start UMB characterization July to August, 2007: preparatory work (e.g. outline of
simulation setting, parameters, timeline) August to December, 2007: Calibration of link curves December 2007 until now: Calibration of system level
simulation results
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Background (2)~ Calibration Processes for UMB Performance Evaluation ~
Link level simulations: From Aug., 2007, each company began to provide simulation
results Oct, 2007: confirmed that three companies (Samsung, Huawe
i, and KDDI) were aligned Nov. to Dec., 2007: another two companies (Qualcomm and
Alcatel-Lucent) were also aligned with the three companies
Appendix A: examples of link level simulation results
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Background (3)~ Calibration Processes for UMB Performance Evaluation ~
System level simulations: From Dec., 2007, companies (KDDI, Samsung, Nortel, Qualcomm, Huawe
i, and Alcatel-Lucent) began to provide simulation results In total, five rounds have been performed for calibration among companie
s so far March, 2008: confirmed that all the companies involved in the calibration
(KDDI, Samsung, Nortel, Qualcomm, and Huawei) were aligned on the full-buffer traffic model in the forward link (FL-FB)
April, 2008: confirmed that all the companies involved in the calibration were aligned on the VoIP traffic model in the forward link (FL-VoIP)
Up to now: most of the companies have been aligned in the remaining simulation scenarios as follows
• Full-buffer traffic model in the reverse link (RL-FB)
• VoIP traffic model in the reverse link (RL-FB)
• Full-buffer traffic model in the forward link with MIMO (FL-MIMO)
Appendix B: examples of system level simulation results
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Toward UMB Performance Evaluation
For the purpose of calibrations among companies, we use a set of simplified simulation models such as Simplified power control model compared to the UMB air inter
face specification No power control in the forward link No rank adaptation in the FL-MIMO simulations Etc.
This presentation provides actual performances both taking account of the realistic scenarios as in above and using simulation parameters in the NGMN’s evaluation metho
dology document
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Simulation Parameters
ValueWrap-around model190.52.0
Path Loss ModelShadowing ModelFading Channel ModelBS Antenna PatternMS Antenna Pattern
-115204624-1745910
Noise Figure of MS [dB]
70 deg @ 3 dB beamwidth, 20 dB max.
Frequency Reuse Factor
Omni
Pilot Format ID
Thermal Noise Density [dBm/Hz]Noise Figure of BS [dB]
Penetration Loss [dB]
Total Transmission Power of MS [dBm]Total Transmission Power of BS [dBm]
TU6 model with 3km/h
MS Antenna Gain [dBi]BS Antenna Gain [dBi]
Carrier Frequency [GHz]128.15+37.6log10(d ) [dB], d in kilometersLog-normal distribution with standard
No. of 3-sector cellsSite-to-Site Distance [km]
ParameterCell Structure Model in Simulations
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Simulation Conditions for Full Queue Traffic Model
System bandwidth – 992 subcarriers over 10MHz Overhead
Guard band – 32 subcarriers CP - 6.51 us Control overhead – 6 tiles (96 subcarriers) in FL with 10% power
overhead, one CDMA subsegment (128 subcarriers) every 8 frames and 2 tiles (32 subcarriers) for R-ACKCH every frame
Superframe preamble – one out of 26 frames (3.85%) Scheduler – Equal resource scheduler (similar to proportional
fair) Power control – No power control for FL. OSI-based power
control for RL with DataCtoI range [-3dB,10dB] and IoTtarget 7.5dB Antenna configurations
SIMO1x2 for FL and RL MIMO2x2 with precoding (64 precoding matrices used) and rank selection
for FL
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~ Full Queue Traffic Model ~ Simulation Results
Average sector throughput and
spectrum efficiency
Average user throughput and
spectrum efficiency
Cell-edge user throughput and
spectrum efficiency
Non-MIMO
(1x2)
12.5 Mbps 1.25 Mbps 0.38 Mbps
MIMO
(2x2)
13.3 Mbps 1.33 Mbps 0.50 Mbps
Forward link (Downlink)
Average sector throughput and
spectrum efficiency
Average user throughput and
spectrum efficiency
Cell-edge user throughput and
spectrum efficiency
Non-MIMO
(1x2)
9.46 Mbps 0.95 Mbps 0.36 Mbps
Reverse link (Uplink)
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Simulation Conditions for VoIP Traffic Model
System bandwidth – 480 subcarriers over 5MHz Overhead
Guard band – 32 subcarriers CP - 6.51 us Control overhead – 4 tiles (64 subcarriers) in FL with 26%
power overhead, 160 subcarriers in RL, including one CDMA subsegment (128 subcarriers) and 2 tiles (32 subcarriers) for R-ACKCH
Superframe preamble – one out of 26 frames (3.85%)
Power control – Target termination based power control.
Antenna configurations – SIMO1x2 for FL and RL
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~ VoIP Traffic Model ~ Simulation Results
VoIP capacity Average latency 95 percent tile of 98% packet delay
Non-MIMO
(1x2)
350+ 12ms 45ms
Forward link (Downlink)
VoIP capacity Average latency 95 percent tile of 98% packet delay
Non-MIMO
(1x2)
300 15ms 50ms
Reverse link (Uplink)
* Since the VoIP system is RL limited, though the FL VoIP capacity is far more than 350, we did not simulate to find the actual number.
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Conclusions
This contribution summarizes activities in TSG-C WG3 EMAH for UMB characterization Calibration of both link- and system-level simulations has
been almost completed
UMB performance results are provided using NGMN simulation conditions.
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References
[1] 3GPP2, “Ultra Mobile Broadband (UMB) Air Interface Specification,” C.S0084-000~009 v.2.0, Sep. 2007.
[2] NGMN Alliance, “NGMN Performance Evaluation Methodology” Version 1.2, June 2007.
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Appendix A~ Examples of link level simulation results ~
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Link level results (1)
FL, BRCH, 8 tiles, PF#10
1.E-03
1.E-02
1.E-01
1.E+00
0 5 10 15 20 25
Es/No [dB]
FE
R
H 1 H 2 H 3 H 4 H 5 H 6S 1 S 2 S 3 S 4 S 5 S 6K 1 K 2 K 3 K 4 K 5 K 6Q 1 Q 2 Q 3 Q 4 Q 5 Q 6A1 A2 A3 A4 A5 A6AV1 AV2 AV3 AV4 AV5 AV6