LTE Signaling
R&S
®
CMW-KM5xx/-KS5xx
52
User Manual 1173.9628.02 ─ 16
Two modes are available. One mode allows you to configure UL and DL channels
globally, for all subframes. The other mode supports individual settings for each sub-
frame (TTI) of a radio frame (all parameters except channel bandwidth configurable per
TTI).
Force PUCCH
If you want to force the UE to use the PUCCH instead of the PUSCH, set the number
of resource blocks to 0. Thus the UE is not allowed to use the PUSCH and must use
the PUCCH to send ACK/NACKs.
2.2.13.1
Supported Number of RB / Position of First RB (DL)
Different resource allocation types are used depending on the selected transmission
scheme, see
For transmission schemes with resource allocation type 2, the number of resource
blocks allocated in the downlink is only restricted by an upper limit. Any number of RBs
between 0 and this upper limit can be allocated. The maximum number of RBs
depends on the channel bandwidth and is listed in
allocated RB is freely selectable within the channel bandwidth. Thus allowed positions
are 0 to <Maximum no of RBs> - 1.
For transmission schemes with resource allocation type 0, the maximum number of
RBs is divided into Resource Block Groups (RBG) with a certain size (see 3GPP TS
36.213, section 7.1.6.1). The RBG size depends on the maximum number of RBs and
thus on the channel bandwidth. If the maximum number of RBs is not a multiple of the
RBG size, the last RBG is smaller than the other RBGs.
Only entire RBGs can be allocated with resource allocation type 0. This restricts both
the number of RBs that can be allocated and the allowed positions for the first RB. The
following tables provide an overview.
Table 2-8: RB parameters depending on channel bandwidth
Channel
bandwidth
Maximum
no of RBs
RBG size
Size of
last RBG
Start RB, resource
allocation type 0
1.4 MHz
6
1
1
0 to 5
3 MHz
15
2
1
0, 2, ..., 12, 14
5 MHz
25
2
1
0, 2, ..., 22, 24
10 MHz
50
3
2
0, 3, ..., 45, 48
15 MHz
75
4
3
0, 4, ..., 68, 72
20 MHz
100
4
4
0, 4, ..., 92, 96
Table 2-9: Example: Allowed combinations for resource allocation type 0, 3 MHz channel bandwidth
Start RB
0
2
4
6
8
10
12
14
No of RBs
2, 4, ..., 14, 15
2, 4, ..., 12, 13
2, 4, ..., 10, 11
2, 4, ..., 8, 9 2, 4, 6, 7 2, 4, 5 2, 3 1
General Description
深圳德标仪器
135-1095-0799
