3GPP TS 36.212, "Multiplexing and channel coding"

Release 8
30
3GPP TS 36.212 V8.1.0 (2007-11)
5.2.2.8 Channel interleaver
The channel interleaver described in this subclause in conjunction with the resource element mapping for PUSCH in [2]
implements a time-first mapping of modulation symbols onto the transmit waveform while ensuring that the control
information is present on both slots in the subframe and is mapped to resources around the uplink demodulation
reference signals.
The bits input to the channel interleaver are denoted by g , g , g ,..., g , where H ′ is the number of modulation
0 1 2 H ′−1
symbols in the subframe. The output bit sequence from the channel interleaver is derived as follows:
PUSCH
(1) Assign C mux = N symb to be the number of columns of the matrix. The columns of the matrix are numbered 0,
1, 2,…, C −1
from left to right.
mux
(2) The number of rows of the matrix is R mux = H / Cmux
and we define R mux
′ = Rmux
/ Qm
.
The rows of the rectangular matrix are numbered 0, 1, 2,…, R −1
from top to bottom.
(3) Write the input vector sequence, i.e.,
starting with the vector
y = g for k = 0, 1,…, H ′ −1
, into the ( )
k k
mux C mux
y in column 0 and rows 0 to ( Q −1)
:
0
m
mux
R × matrix by Q m rows
⎡
⎢
⎢
⎢
⎢
⎢y
⎣
y
y
0
Cmux
M
( Rmux
′ −1)
× Cmux
y
y
y
1
Cmux
+ 1
M
( Rmux
′ −1)
× Cmux
+ 1
y
y
y
2
Cmux
+ 2
M
( Rmux
′ −1)
× Cmux
+ 2
L
L
O
L
y
y
y
Cmux
−1
2Cmux
−1
M
( Rmux
′ × Cmux
−1)
⎤
⎥
⎥
⎥
⎥
⎥
⎦
[Note from the editor: if part of the control information punctures the data transmission, this is a good place to
perform the operation]
(4)The output of the block interleaver is the bit sequence read out column by column from the ( R mux × C mux ) matrix.
The bits after channel interleaving are denoted by h
0
h1
, h2
,..., h H 1
.
5.2.3 Uplink control information
,
−
Data arrives to the coding unit in form of indicators for measurement indication, scheduling request and HARQ
acknowledgement.
Three forms of channel coding are used, one for the channel quality information (CQI), another for HARQ-ACK
(acknowledgement) and scheduling request and another for combination of channel quality information (CQI) and
HARQ-ACK.
a0 ,...,
, a1
a A −1
b0 ,...,
, b1
b B −1
Figure 5.2.3-1: Processing for UCI
5.2.3.1 Channel coding for UCI HARQ-ACK
Details for the coding of the HARQ acknowledgement message. Need to include the possibility of repetition. Also need
to include the coding when the control is multiplexed with the data.
3GPP