User Equipment (UE) Categories
HSDPA comprises various versions with different data speeds. In 2009 the most common devices are category 6 (3.6 Mbit/s) and category 8 (7.2 Mbit/s) with retail prices around 60 euros without subscription.
The following table is derived from table 5.1a of the release 11 of 3GPP TS 25.306 and shows maximum data rates of different device classes and by what combination of features they are achieved. The per-cell per-stream data rate is limited by the Maximum number of bits of an HS-DSCH transport block received within an HS-DSCH TTI and the Minimum inter-TTI interval. The TTI is 2 ms. So for example Cat 10 can decode 27952 bits/2 ms = 13.976 MBit/s (and not 14.4 MBit/s as often claimed incorrectly). Categories 1-4 and 11 have inter-TTI intervals of 2 or 3, which reduces the maximum data rate by that factor. Dual-Cell and MIMO each multiply the maximum data rate by 2, because multiple independent transport blocks are transmitted over different carriers or spatial streams, respectively. The data rates given in the table are rounded to one decimal point.
| 3GPP Release | Category | Max. number of HS-DSCH codes |
Modulation | MIMO, Multi-Cell | Code rate at max. data rate |
Max. data rate |
|---|---|---|---|---|---|---|
| Release 5 | 1 | 5 | 16-QAM | .76 | 1.2 | |
| Release 5 | 2 | 5 | 16-QAM | .76 | 1.2 | |
| Release 5 | 3 | 5 | 16-QAM | .76 | 1.8 | |
| Release 5 | 4 | 5 | 16-QAM | .76 | 1.8 | |
| Release 5 | 5 | 5 | 16-QAM | .76 | 3.6 | |
| Release 5 | 6 | 5 | 16-QAM | .76 | 3.6 | |
| Release 5 | 7 | 10 | 16-QAM | .75 | 7.2 | |
| Release 5 | 8 | 10 | 16-QAM | .76 | 7.2 | |
| Release 5 | 9 | 15 | 16-QAM | .70 | 10.1 | |
| Release 5 | 10 | 15 | 16-QAM | .97 | 14.0 | |
| Release 5 | 11 | 5 | QPSK | .76 | 0.9 | |
| Release 5 | 12 | 5 | QPSK | .76 | 1.8 | |
| Release 7 | 13 | 15 | 64-QAM | .82 | 17.6 | |
| Release 7 | 14 | 15 | 64-QAM | .98 | 21.1 | |
| Release 7 | 15 | 15 | 16-QAM | MIMO | .81 | 23.4 |
| Release 7 | 16 | 15 | 16-QAM | MIMO | .97 | 28.0 |
| Release 7 | 19 | 15 | 64-QAM | MIMO | .82 | 35.3 |
| Release 7 | 20 | 15 | 64-QAM | MIMO | .98 | 42.2 |
| Release 8 | 21 | 15 | 16-QAM | Dual-Cell | .81 | 23.4 |
| Release 8 | 22 | 15 | 16-QAM | Dual-Cell | .97 | 28.0 |
| Release 8 | 23 | 15 | 64-QAM | Dual-Cell | .82 | 35.3 |
| Release 8 | 24 | 15 | 64-QAM | Dual-Cell | .98 | 42.2 |
| Release 9 | 25 | 15 | 16-QAM | Dual-Cell + MIMO | .81 | 46.7 |
| Release 9 | 26 | 15 | 16-QAM | Dual-Cell + MIMO | .97 | 55.9 |
| Release 9 | 27 | 15 | 64-QAM | Dual-Cell + MIMO | .82 | 70.6 |
| Release 9 | 28 | 15 | 64-QAM | Dual-Cell + MIMO | .98 | 84.4 |
| Release 10 | 29 | 15 | 64-QAM | Triple-Cell | .98 | 63.3 |
| Release 10 | 30 | 15 | 64-QAM | Triple-Cell + MIMO | .98 | 126.6 |
| Release 10 | 31 | 15 | 64-QAM | Quad-Cell | .98 | 84.4 |
| Release 10 | 32 | 15 | 64-QAM | Quad-Cell + MIMO | .98 | 168.8 |
| Release 11 | 33 | 15 | 64-QAM | Hexa-Cell | .98 | 126.6 |
| Release 11 | 34 | 15 | 64-QAM | Hexa-Cell + MIMO | .98 | 253.2 |
| Release 11 | 35 | 15 | 64-QAM | Octa-Cell | .98 | 168.8 |
| Release 11 | 36 | 15 | 64-QAM | Octa-Cell + MIMO | .98 | 337.5 |
- Notes:
Read more about this topic: High-Speed Downlink Packet Access
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