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ANYPA HSDPA (High Speed Downlink Packet Access) Simulator |
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HSDPA (High-Speed Downlink Packet Access) is a new mobile technology and is sometimes referred to as a 3.5G (or "3 1/2 G") technology. In this respect it is extended technology of WCDMA, EV-DO, and CDMA2000. It is an evolution of the W-CDMA standard, designed to increase the available data rate by a factor of 5 or more. HSDPA defines a new W-CDMA channel with the high-speed downlink shared channel (HS-DSCH) that operates in a different way from existing W-CDMA channels, but is only used for downlink communication to the mobile. C&C Instruments Co., Ltd and KAIST (Korea Advanced Institute Science & Technology) has developed HSDPA simulator product jointly.
Features
- Delivers a competitive advantage for CDMA, CDMA2000, 1x EVDO, UMTS/W-CDMA and HSDPA service providers.
- Improve the user experience of new, converged services such as streaming video, mobile Internet browsing, and bundled combination by boosting network performance.
- Offering well organized Wireless Network scenario and friendly demonstration structure.
- Hexagonal grid 3 sector based cell structure demonstration.
- Transmit antenna diversity (no MIMO, Open-loop, Close-loop)
- Powerful scheduling algorithm based with high efficiency.
- Inter Cell interference.
- Vehicular Speed Demonstration.
Comparison between 1xEV/DO and HSDPA
| Technical Feature |
HSDPA |
1xEV-DO |
Downlink frame size |
2ms TTI |
1,2.5, 2,5, 5,10 ms variable frame size |
Channel Feedback |
Channel quality reported at 2ms rate or 500 Hz |
C/I feedback at 800 Hz (every 1,25 ms) |
Data user multiplexing Adaptive modulation and coding |
TDM/CDM
Q PSK (Quadrate Phase Shift Keying ) and 16 QAM Mandatory |
TDM/CDM
PSK, 8 PSK and 16 QAM |
Hybrid ARQ (Automatic Repeat Request) |
Chase or Incremental Redundancy (IR) |
Asynchronous Incremental Redundancy |
Spreading factor |
SF=16 using UTRA OVSF canalization codes |
Wash code length 32 |
Control Channel approach |
Dedicated channel printing to shared channel. |
Common control channel |
Present status (Simulation result)
| Carrier Frequency |
2GHz |
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Frequency reuse factor |
1 |
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Channel bandwidth |
5MHz |
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Cell layout |
Hexagonal grid, 3-sector sites and 2-tier |
Hexagonal grid, single sector sites and 1-tier, single cell |
Cell radius |
500m |
1,2.8km |
Antenna Horizontal Pattern |
70deg(-3dB) with 20 dB Front-to-Back ratio |
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Node-B Antenna gain |
14 dBi (sector) |
0dBi (omni) |
UE antenna gain |
0 dBi |
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Tx. Antenna diversity |
No diversity, open and close loop |
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UE distribution |
Uniform |
Gaussian |
Channel models |
AWGN, ITU PA3, PB3, VA30,VA60, VA120 |
Homogeneous channel model. A mixture of channel models |
Traffic Models |
HTTP (data), NRTV (video), full queue (overloaded) |
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Path loss model |
L=128.1+37.6log10(R) |
R in km |
Slow fading model |
Log-normal distribution |
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Standard deviation of slow fading |
8.0dB |
8.9 dB |
Correlation between cells |
0,5 |
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Fast fading model |
Jakes, spectrum |
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Thermal noise density |
-174 dB/Hz |
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UE noise figure |
9dB |
5dB |
UE implementation loss |
0dB |
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Node-B cable loss |
0dB |
2dB |
Node-B Total Tx, power per sector |
40 dBm(10 W) |
Up to 43 dBm (20 w) |
Power allocation to Tx power |
Control:20% of total Tx. Power
DPCH :x% of total Tx. Power
HS-PDSCH :y% of total Tx.power
(x=y=80) |
Control : CPICH 10%, other common channels 10% DPCH: voice HS-PDSCH : data, video |
Inter-cell interference |
Maximum (100%) |
Minimum (20% or 0%) |
H-ARQ scheme |
Chase combining |
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Re-transmission priority |
Maximum |
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Max. number of H-ARQ re-transmission |
3 |
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ACK/NACK transmission delay |
5ms |
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CQI transmission delay |
3TTI |
2,1 TTI |
De-rating parameters(ε) |
-0.25 dB/TTI |
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CQI value |
CQSIsched =CQIt0 + ε(t-t0) |
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HS-SCCH (ACK/NACK) HS-DPCCH (CQI) |
Error free |
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Number of codes for HSPDSCH |
15 |
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Slot length |
0.67ms |
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TTI (sub-frame) length) |
2ms (3slots) |
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Scheduling algorithm |
Max C/I, proportionality fair, round robin |
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Number of HS-SCCH |
1 (pure TDM) |
4 (hybrid TDM/CDM) |
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