Page tree
Skip to end of metadata
Go to start of metadata


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
  1. 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, Ndata* is defined as N′data* = P (15 Ndata 1 + 15 Ndata 2). Ndata 1 and Ndata 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:

    wk = sk k = 1, 2, 3, ..., S
    wk = δ
    k = S + 1, S + 2, S + 3, ... , PR

    where δ denotes DTX indication bits
    Here sk Œ{0,1} and δ œ{0,1}.
  2. 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
  1. 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

  2. 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

  • No labels