3GPPFDD_DLSecDTXInser
Description: Second insertion of DTX indication bits
Library: 3GPPFDD, TrCH Multiplexers & Coders
Class: SDF3GPPFDD_DLSecDTXInser
Derived From: 3GPPFDD_DLCCTrCHBase
Parameters
Name |
Description |
Default |
Unit |
Type |
Range |
|---|---|---|---|---|---|
SpecVersion |
version of specifications: Version_03_00, Version_12_00, Version_03_02 |
Version_12_00 |
|
enum |
|
SlotFormat |
slot format |
0 |
|
int |
† |
PhyCHNum |
downlink physical channel number |
1 |
|
int |
[1:8] |
TrCHType |
transport channel type: DCH_Type, BCH_Type, PCH_FACH_Type |
DCH_Type |
|
enum |
|
† [0:5] for uplink DPCCH;
[0:16] for downlink DPCH;
[0:17] for downlink SCCPCH;
[0:5] for uplink PCPCH (Ver 03_00);
[0:2] for uplink PCPCH (Ver 12_00);
[0:1] for uplink PCPCH (Ver 03_02).
Pin Inputs
Pin |
Name |
Description |
Signal Type |
|---|---|---|---|
1 |
SizeIn |
input size |
int |
2 |
DataIn |
input data |
int |
Pin Outputs
Pin |
Name |
Description |
Signal Type |
|---|---|---|---|
3 |
DataOut |
output data |
int |
Notes/Equations
- This model is used to implement second DTX insertion. The DTX indication bits inserted in this step are placed at the end of the radio frame. The DTX will be distributed over all slots after second interleaving.
The bits input to the DTX insertion block are denoted by s 1, s 2, s 3, ... , sS, where S is the number of bits from TrCH multiplexing. The number of PhCHs is denoted by P and the number of bits in one radio frame, including DTX indication bits, for each PhCH is denoted by R.
In normal mode
where Ndata 1 and Ndata 2 and are defined in [2].
,
For compressed mode, N ′data* is defined as N′data* = P (15 N ′data 1 + 15 N ′data 2). N ′data 1 and N ′data 2 are the number of bits in the data fields of the slot format used for the current compressed mode, i.e. slot format A or B as defined in [2] corresponding to the spreading factor and the number of transmitted slots in use.
The bits output from the DTX insertion block are denoted by w 1, w 2, w 3, ... , w (PR ). Note that these bits are 4-valued for the compressed mode by puncturing, and 3-valued otherwise. They are defined by the following relations:
where δ denotes DTX indication bitswk = sk k = 1, 2, 3, ..., S
wk = δ
k = S + 1, S + 2, S + 3, ... , PR
Here sk Œ{0,1} and δ œ{0,1}. - This model fires once per radio frame. Each firing, one token is consumed by pin SizeIn; this token indicates the effective length of data block input at pin DataIn. This model will then insert DTX bits into the data block if necessary; the data block is output at pin DataOut.
References
- 3GPP Technical Specification TS 25.212 V3.9.0, Multiplexing and Channel Coding (FDD) 2002-03, Release 1999.
http://www.3gpp.org/ftp/Specs/2002-03/R1999/25_series/25212-390.zip
- 3GPP Technical Specification TS 25.211 V3.10.0, Physical channels and mapping of transport channels onto physical channels (FDD), March 2003, Release 1999.
http://www.3gpp.org/ftp/Specs/2002-03/R1999/25_series/25211-3a0.zip