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Conception, Characterization,Design, Optimization and
Networks
Effective Wireless Network Design
LEONHARD KOROWAJCZUKCelPlan Technologies, Inc.
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CelPlan Technologies CelPlanner Suite software
Design
Planning Optimization
Performance
Business Case/ RFP preparation
Vendor Selection
Network Design
Network Optimization
Technology Training
High Level consulting
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Wi4Net Division Citywide Video Surveillance Networks for Public Safety
Los Angeles Long Beach
Milwaukee
Reading
McAllen Toledo
Modesto
Taylorsville
Technology (4.9 GHz) Wi-Fi
WiMAX
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Publications White papers
Designing WiMAX Networks available
Designing LTE Networks in preparation
Books Designing cdma2000 Systems
published by Wiley in 2006- 963 pages, available in hard cover, e-book and Kindle
LTE , WiMAX and WLAN Network Design, Optimization andPerformance Analysis
published by Wiley (June 2011)- 750 pages
Books in Preparation:
Smart Grids Network Design Backhaul Network Design
Technology Training Class WiMAX Forum Network Designer Certification Bootcamp
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Why Planning WiMAX is different from 2G and 3G ?
AMC Adaptive Modulation and Coding
Network Capacity is 6 times larger when using 64
QAM then when using QPSK
User location affects significantly capacity
designed with latency, error rates and otherparameters in mind
Services, applications, user location and
equipment have to be modeled in detail
Better RF propagation models are required
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Radio Sensitivity Factors Base SNIR
FEC
Mobility
Symbol Permutation
HARQ Effect
MIMO ReductionFactor with fading
RX Diversity gain
TX Diversity gain
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Multiplexing UL Collaborative
MIMO
AAS Beamforming
Conditions Antenna Correlation
Multipath Fading
Modulation
BER
Results Maximum Data Rate
Sensitivity
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Network Capacity Unsatisfied customers are the ones that consume
system capacity
30
35
dBm
Power Control
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-5
0
5
10
15
20
25
0 10000 20000 30000 40000 50000 60000Transm
itPower(dBm)-max30
Distance (m) for 20 dB/decade path loss
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Capacity Solutions Limit low data rate users
Smaller cells (300 to 400 m radius for indoor coverage)
Limit by signal level Limit by distance (zoning)
Limit QPSK access
Minimize Interference (frequency and code planning) Segmentation
Zoning
Permutation Look for resource assignment bugs
CPE
Base Station
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Predict Network Performance RF characterization
Fading
Indoor penetration
3 D propagation models
3 D traffic distribution
Dynamic traffic simulation
KPI analysis
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Fading Measurements
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Winter and Summer
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Korowajczuk 3D model Diffraction is considered in the vertical and horizontal planes
Fractional morphology is used (Fresnel zone consideration)
Simultaneous outdoor and indoor prediction
Fading calculated per pixel
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K3D Prediction
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K3D Measurements/Predictions
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Traffic management Users want maximum speed and unrestricted
data plans Radios should always work at maximum data rate
allowed by each connection
-network is congested
Look for multiple IPs
Understand traffic profile
M2M applications can be an issue Reboot offender CPEs
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Automatic Site Location Site choice
according to:
Traffic capability
Availability of LOS
Cost Budget
Revenue
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Line of Sight Study
Stop criterion was 99% of maximum
possible traffic using all candidates
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Interference Considerations To do Resource Optimization Software has to know the interferencebetween any pair of sectors
The best way to express interference is as an outage against an SNIR
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Uplink Interference from multiple cells
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Dynamic Traffic Simulation Market is modeled throughService Classes Services
Terminals CPE radio
Environment
Sessions are randomlygenerated in proportion to thetraffic layers associated withthem Snapshot
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path loss is predictions BTS Radio
Link budget
Scheduler and ResourceManagement algorithms assigncalls, interference is replaced byan average noise rise
Statistics are recorded forsnapshot Served Sessions
Rejected Sessions
Served Traffic
Rejected Traffic
Queued traffic
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KPI AnalysisTraffic Throughput KPI at 75% of Peak Rate (within QPSK coverage area)
Service
Class Code
Class
Name
Peak
Down
(kbps)
Peak Up
(kbps)
Target
Percentag
e of Peak
Rate
Target Rate (Mbps)
Target
Sessions
Percentag
e
Percentage of Sessions
above Target RateStatus
Minimum Throughput
Achieved at Target
Percentage of Sessions
(kbps)
Average Throughput
Achieved (kbps)
DL UL DL UL DL UL DL UL DL UL
c1ID-512k-
256k512 256 75% 384 192 25% 87% 93% PASS PASS 512 256.0 479.2 240.9
c2 ID-768k-384k
768 384 75% 576 288 25% 91% 66% PASS PASS 768 368.7 724.2 319.4
c3ID-1M-
512k1,024 512 75% 768 384 25% 93% 48% PASS PASS 1024 456.1 971.8 377.7
c4ID-2M-
512k2,048 512 75% 1536 384 25% 82% 48% PASS PASS 2048 456.1 1863.0 378.1
c5ID-VoIP-
36k36 36 75% 27 27 25% 100% 100% PASS PASS 36 36.0 36.0 36.0
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c6ODLow-
512k-256k512 256 75% 384 192 25% 100% 100% PASS PASS 512 256.0 509.0 254.9
c7ODLow-
768k-384k768 384 75% 576 288 25% 100% 100% PASS PASS 768 384.0 767.4 383.0
c8ODLow-
1M-512k1,024 512 75% 768 384 25% 100% 100% PASS PASS 1024 512.0 1023.6 508.9
c9ODLow-
2M-512k2,048 512 75% 1536 384 25% 100% 100% PASS PASS 2048 512.0 2032.5 508.3
c10ODLow-
VoIP-36k36 36 75% 27 27 25% 100% 100% PASS PASS 36 36.0 36.0 36.0
c11 ODHigh-512k-256k
512 256 75% 384 192 25% 100% 100% PASS PASS 512 256.0 509.1 255.4
c12ODHigh-
768k-384k768 384 75% 576 288 25% 100% 100% PASS PASS 768 383.9 767.4 383.7
c13ODHigh-
1M-512k1,024 512 75% 768 384 25% 100% 100% PASS PASS 1024 512.0 1022.9 511.4
c14ODHigh-
2M-512k2,048 512 75% 1536 384 25% 100% 100% PASS PASS 2045 512.0 2027.7 512.0
c15ODHigh-
VoIP-36k36 36 75% 27 27 25% 100% 100% PASS PASS 36 36.0 36.0 36.0
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Multi floor/environment traffic
distribution
Subscribers
above 20th floor
Subscribers above
10th floor and below
20th floor
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Subscribers above4th floor and below
10th floor
Subscribers above
ground level and
below 4th floor
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Applications Video Surveillance
Public safety requires high definition video 24 h
2 Mpixel images at 24 fps can be compressed to 1Mbit/s
Two to four cameras er sector
Directional antennas assure 64 QAM connectivity
Smart Grids
Metering and control requirements
Five nine availability is required for some controlapplications with small latency (< 30 ms)
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Public Video Surveillance Backhaul and cost are issues
Wi-Fi first tier
WiMAX second tier
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Thank You!
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