Data Rate Generation for cdma2000 1xEVDO

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Data Rate Generation for cdma2000 1xEV-DO

• NDS lab
• ??? ?? 19991233

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1xEV-DO?

• cdma2000 1xEVolution-Data Optimized
• Promising wireless internet solution
• CDMA merits
• Optimized for packet data (Max. 2457 Kbps)
• Shared forward link channel
• Scheduling with feedback
• Worth Simulating

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Project Overview

• Mobility Data Rate Generation

Data rate of one AT
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Data Rate Decision Factor

• Position (x, y)
• Speed Class
• Pedestrian (010km/h, mean 5km, 1046 Kbps)
• Low Speed Vehicle (050, 20, 438 Kbps)
• High Speed Vehicle (0150, 80, 652 Kbps)
• Direction
• Left Right Up Down

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Algorithm (rough)

• Initialize
• (x, y), speed class, direction
• Generate Data Rate
• Get current maximum, then Data Rate is
• Max Z , Z beta( a, ß ) (Kbps)
• Move
• Next (x, y), speed class, direction
• Repeat From 2

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Setting Environment

• Maximum data rate for each position
• Chance of speed class change (p-b)
• Chance of direction change

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Estimate Unknown Parameters
Mean Max Rate Mean beta(a,ß) Mean
Throughput for each speed class
smok_at_ main 5 maximum rate generation 10000
times. mean 1493.015927 mean 1495.357947 mean
1497.572118 mean 1483.845120 mean
1483.845120 mean 1500.513115 mean 1483.627523
Pedestrian case, 1490 a/(aß) 1046 Assume a
variance aß 11 Data Rate for Pedestrian
Case Max Rate beta( 8, 3 )
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Result