11 Physical Multicast Channel (PMCH) related procedures
36.2133GPPEvolved Universal Terrestrial Radio Access (E-UTRA)Physical layer proceduresRelease 17TS
11.1 UE procedure for receiving the PMCH
A UE is not expected to receive PMCH with 
(
defined in [3]) other than 
in an MBSFN subframe with non-zero-size non-MBSFN region.
A UE is not expected to receive PMCH with in an MBSFN subframe with zero-size non-MBSFN region.
A UE is not required to receive the non-MBSFN region in an MBSFN subframe carrying PMCH with 
and belonging to an MBSFN area with higher layer parameter pmch-Bandwidth ( configured.
The UE shall decode the PMCH when configured by higher layers. The UE may assume that an eNB transmission on the PMCH is performed according to Clause 6.5 of [3].
The
for the PMCH is configured by higher layers. To determine the modulation order (
) and TBS index (
) used in the PMCH the UE shall
– if the UE is configured by higher layers to decode the PMCH based on QPSK, 16QAM, 64QAM, and 256QAM
– if the PMCH is with 
and the UE is configured with higher layer parameter timeSeperation with value ‘4’
– use 
and Table 11.1-2 for determining the modulation order (
) and TBS index (
)
– otherwise,
– use
and Table 7.1.7.1-1A for determining the modulation order (
) and TBS index (
)
– otherwise,
– if the PMCH is with 
and the UE is configured with higher layer parameter timeSeperation with value ‘4’
– use 
and Table 11.1-1 for determining the modulation order (
) and TBS index (
)
– otherwise,
– use
and Table 7.1.7.1-1 for determining the modulation order (
) and TBS index (
).
The UE shall then follow the procedure in Clause 7.1.7.2.1 to determine the transport block size, assuming 
is equal to if PMCH belongs to an MBSFN area with higher layer parameter pmch-Bandwidth configured, 
otherwise For PMCH with 
the UE shall scale the derived transport block size by 
, then round to the closest valid transport block size in the union of Table 7.1.7.2.1-1 and Table 7.1.7.2.4-1 by including, in the rounding procedure, only the TBS entries in Table 7.1.7.2.1-1 with and the entries in 7.1.7.2.4-1 for which the TBS_L1 is present in Table 7.1.7.2.1-1 with if the UE is configured by higher layers to decode the PMCH based on QPSK, 16QAM, 64QAM, and 256QAM; and only the TBS entries in Table 7.1.7.2.1-1 with and the entries in 7.1.7.2.4-1 for which the TBS_L1 is present in Table 7.1.7.2.1-1 with otherwise. In case the scaled TBS has the same distance to two valid transport block sizes, it is rounded to the larger transport block size. The UE shall set the redundancy version to 0 for the PMCH.
A UE may optionally report parameters mbms-MaxBW (), mbms-ScalingFactor1dot25 ( , mbms-ScalingFactor7dot5 (), mbms-ScalingFactor2dot5 (), and mbms-ScalingFactor0dot37 () to indicate a limitation on baseband capability provided by the following inequality
where
– T is the maximum bandwidth capability of the UE, indicated by mbms-MaxBW:
– if mbms-MaxBW is set to implicitValue, then
where the numerator and the denominator correspond to the corresponding columns of the maximum indicated ue-CategoryDL in [12].
– if mbms-MaxBW is set to explicitValue, then
– C is the number of serving cells the UE is configured with, or receiving PMCH from.
– is the number of spatial layers the UE can receive in the c-th serving cell according to MIMO-CapabilityDL.
– is the bandwidth (in MHz) of the c-th serving cell.
– if the UE is receiving PMCH belonging to an MBSFN area with higher layer parameter pmch-Bandwidth configured for the c-th serving cell.
– If the UE is receiving PMCH with 1.25kHz numerology in serving cell c, then
–
– else, if the UE is receiving PMCH with 7.5kHz numerology in serving cell c, then
–
– else, if the UE is receiving PMCH with 2.5kHz numerology in serving cell c, then
–
– else, if the UE is receiving PMCH with 0.37kHz numerology in serving cell c, then
–
– else,
–
Table 11.1-1: Modulation and TBS index table for PMCH
|
MCS Index |
Modulation Order |
TBS Index |
|
0 |
2 |
0 |
|
1 |
2 |
1 |
|
2 |
2 |
2 |
|
3 |
2 |
3 |
|
4 |
2 |
4 |
|
5 |
2 |
5 |
|
6 |
2 |
6 |
|
7 |
2 |
7 |
|
8 |
2 |
8 |
|
9 |
2 |
9 |
|
10 |
2 |
10 |
|
11 |
4 |
10 |
|
12 |
4 |
11 |
|
13 |
4 |
12 |
|
14 |
4 |
13 |
|
15 |
4 |
14 |
|
16 |
4 |
15 |
|
17 |
4 |
16 |
|
18 |
4 |
17 |
|
19 |
4 |
18 |
|
20 |
4 |
19 |
|
21 |
6 |
19 |
|
22 |
6 |
20 |
|
23 |
6 |
21 |
|
24 |
6 |
22 |
|
25 |
6 |
23 |
|
26 |
6 |
24 |
|
27 |
6 |
25 |
|
28 |
6 |
26/26A |
|
29 |
2 |
reserved |
|
30 |
4 |
|
|
31 |
6 |
Table 11.1-2: Modulation and TBS index table 2 for PMCH
|
MCS Index |
Modulation Order |
TBS Index |
|---|---|---|
|
0 |
2 |
0 |
|
1 |
2 |
2 |
|
2 |
2 |
4 |
|
3 |
2 |
6 |
|
4 |
2 |
8 |
|
5 |
2 |
10 |
|
6 |
4 |
11 |
|
7 |
4 |
12 |
|
8 |
4 |
13 |
|
9 |
4 |
14 |
|
10 |
4 |
15 |
|
11 |
4 |
16 |
|
12 |
4 |
17 |
|
13 |
4 |
18 |
|
14 |
4 |
19 |
|
15 |
6 |
20 |
|
16 |
6 |
21 |
|
17 |
6 |
22 |
|
18 |
6 |
23 |
|
19 |
6 |
24 |
|
20 |
6 |
25 |
|
21 |
8 |
27 |
|
22 |
8 |
28 |
|
23 |
8 |
29 |
|
24 |
8 |
30 |
|
25 |
8 |
31 |
|
26 |
8 |
32 |
|
27 |
8 |
33/33A/33B |
|
28 |
2 |
reserved |
|
29 |
4 |
|
|
30 |
6 |
|
|
31 |
8 |
11.2 UE procedure for receiving MCCH and system information change notification
If a UE is configured by higher layers to decode PDCCHs with the CRC scrambled by the M-RNTI, the UE shall decode the PDCCH according to the combination defined in Table 11.2-1.
Table 11.2-1: PDCCH configured by M-RNTI
|
DCI format |
Search Space |
|
DCI format 1C |
Common |
The 8-bit information for MCCH change notification [11], as signalled on the PDCCH, shall be delivered to higher layers.
The 2-bit information for System information change notification [11], as signalled on the PDCCH, shall be delivered to higher layers.