R&S CMW-KG4 Series, User Manual, Page: 914 / 988

WCDMA Generator
R&S
®
CMW-KG4xx/-KM4xx/-KS4xx
914 User Manual 1173.9657.02 ─ 11
serving cell.An E-DCH absolute grant is transmitted using 3 or 15 consecutive slots
depending on the Transmission Time Interval (TTI) of the E-DCH (2 ms or 10 ms).
In each slot a sequence of 20 bits is transmitted.
●
The Enhanced DCH Relative Grant Channel (E-RGCH) carries the uplink E-DCH
relative grants. A relative grant updates the uplink (E-DCH) resource allocation to a
UE. It is transmitted using 3 or 12 consecutive slots depending on the TTI of the E-
DCH (2 ms or 10 ms). In each slot a sequence of 40 ternary values (corresponding
to Up / Hold / Down) is transmitted.
●
The Enhanced DCH HARQ Indicator Channel (E-HICH) carries the uplink E-DCH
Hybrid Automatic Repeat Request (HARQ) acknowledgement indicator. When the
Node B receives a data packet correctly from the UE it uses this indicator to return
an acknowledgement (ACK). When it receives a data packet with errors the Node
B returns a negative acknowledgement (NACK) requesting retransmission of the
data packet.A HARQ acknowledgement indicator is transmitted using 3 or 12 con-
secutive slots depending on the TTI of the E-DCH. In each slot a sequence of 40
binary values (corresponding to ACK / NACK) is transmitted.
Fig. 6-7: Structure of E-AGCH, E-RGCH and E-HICH
E-RGCH and E-HICH use the same channelization code. They are separated by spe-
cific orthogonal signature sequences defined in 3GPP TS 25.211.
6.2.3 Dedicated Channel Models
The generator provides three basic DCH models specified by 3GPP. All models are
available with several data rates and are described in this section.
Alternatively the dedicated channel can also be configured as fractional DPCH, see
chapter 6.2.2.5, "Fractional Dedicated Physical Channel (F-DPCH)" , on page 912.
● Reference Measurement Channel (RMC) .............................................................915
● Signaling Radio Bearer (SRB) .............................................................................. 916
● Blind Transport Format Detection (BTFD) ............................................................ 916
General Description
深圳德标仪器
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