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LTE Signaling
R&S
®
CMW-KM5xx/-KS5xx
55
User Manual 1173.9628.02 ─ 16
target code rate as far as possible. Thus the transport block size depends on the CQI
index and on the number of allocated RBs.
2.2.14.2
Follow WB CQI Channels
This scheduling type is supported for the transmission modes 1 to 7. Option R&S
CMW-KS510 is required.
The downlink signal reacts to the reported CQI index value. That means, the MCS
index value used for the downlink depends on the previous wideband CQI value repor-
ted by the UE.
The dependency between CQI and MCS is configured via a mapping table. The table
assigns an MCS index value (0 to 28) to each possible reported wideband CQI index
value (1 to 15).
The reported PMI and RI values have no effect on the downlink signal.
In addition to the mapping table, you can configure the following downlink settings:
●
Channel bandwidth
●
Number of allocated Resource Blocks (RB)
●
Position of the first allocated RB
All downlink settings are configured globally, not per TTI. The rules for configuration of
the number of RB and the position of the first RB are exactly the same as for user-
defined downlink channels, see
chapter 2.2.13.1, "Supported Number of RB / Position
Subframe 0 and 5 are not scheduled for duplex mode FDD. For TDD, UL/DL configura-
tion 2 is used and only downlink subframe 3, 4, 8 and 9 are scheduled. This complies
with the reference channel definition for CQI tests, as defined in 3GPP TS 36.521,
Table C3.2-4.
2.2.14.3
Follow WB PMI Channels
This scheduling type is supported for the transmission modes 4 and 6. Option R&S
CMW-KS510/-KS512 is required (without CA/with CA).
The PMI value used for the downlink signal follows the reported PMI value. The repor-
ted CQI and RI values have no effect on the downlink signal.
The downlink signal settings are similar to the settings for user-defined downlink chan-
nels (global configuration, not per TTI), see
chapter 2.2.13, "User-Defined Channels"
Subframe 5 is not scheduled for duplex mode FDD. For TDD, UL/DL configuration 2 is
used and only downlink subframe 0, 3, 4, 8 and 9 are scheduled. This complies with
the reference channel definition for CQI tests, as defined in 3GPP TS 36.521, Table
C3.2-3.
General Description
深圳德标仪器
135-1095-0799