Moreover, based on the ACK/NACK signaling on the uplink, the transmit
power of HS-DSCH can also be adjusted. All these power control suggestions are loosely discussed
in the 3GPP specification and are left to the NodeB manufacturer??™s discretion [44].
Some authors proposed an inner??“ and outer??“power control loop mechanism for the HS-DSCH and
HS-SCCH channels, as shown in Fig. 7.126 [45].
3G WIDEBAND CDMA 437
FIGURE 7.119 HS-SCCH encoding overview.
Redundancy Version,
TrCh Block Size,
New Data Indicator,
Process ID
MUX
CRC
Attachment
Channel Coding 2
&
Rate Match 2
MUX
Channel Coding 1
&
Rate Match 1
UE Specific
Masking
Physical Channel Mapping
HS-SCCM
Channelization Codes
& Modulation
TABLE 7.2 HSDPA Category Listing
HS-DSCH Max no. of Minimum inter- Data rate
category Modulation H-Set HS-DSCH codes TTI interval (QPSK/QAM), kbps
1 QPSK/16-QAM 1 5 3 534/777
2 QPSK/16-QAM 1 5 3 534/777
3 QPSK/16-QAM 2 5 2 801/1166
4 QPSK/16-QAM 2 5 2 801/1166
5 QPSK/16-QAM 3 5 1 1601/2332
6 QPSK/16-QAM 3 5 1 1601/2332
7 QPSK/16-QAM 3/6 10 1 3219/4689
8 QPSK/16-QAM 3/6 10 1 3219/4689
9 QPSK/16-QAM NA 15 1 NA
10 QPSK/16-QAM NA 15 1 NA
11 QPSK 4 5 2 534/NA
12 QPSK 5 5 1 801/NA
13 QPSK/16-QAM/64-QAM 3/6/8 15 1 13245
14 QPSK/16-QAM/64-QAM 3/6/8 15 1 13245
15 MIMO 9 15 1 4860/8650
16 MIMO 9 15 1 4860/8650
As stated earlier, if the HS-DSCH CRC fails, then a NACK will be sent on the uplink HS-DPCCH.
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