3GPPFDD ULRadioSeg

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3GPPFDD_ULRadioSeg

Description: Radio frame segmentation
Library: 3GPPFDD, TrCH Multiplexers & Coders
Class: SDF3GPPFDD_ULRadioSeg
Derived From: 3GPPFDD_TrCHBase

Parameters

Name	Description	Default	Type	Range
SpecVersion	version of specifications: Version_03_00, Version_12_00, Version_03_02	Version_12_00	enum
DynTFSet	dynamic part of Transport Format Set	244 976	int array	†
TTI	Transmission Time Interval: TTI_10ms, TTI_20ms, TTI_40ms, TTI_80ms	TTI_10ms	enum
CRC	number of CRC bits: No_CRC, CRC_8_bits, CRC_12_bits, CRC_16_bits, CRC_24_bits	CRC_16_bits	enum
CHCodingType	channel coding type: No_Coding, CC_HalfRate, CC_OneThirdRate, TurboCoding	CC_HalfRate	enum

† The range for each element must be in [0:164480]; elements shall be paired integers; the first of the pair is the transport block size; the second one is the transport block set size; the second shall be multiple of the first.

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	SizeOut	output size	int
4	DataOut	output data	int

Notes/Equations

This model is used to implement uplink radio frame segmentation. When the transmission time interval is longer than 10 msec, the input bit sequence is segmented and mapped onto consecutive F_i radio frames. After rate matching in the DL, the input bit sequence length is guaranteed to be an integer multiple of F_i.
The input bit sequence is denoted by x_i 1, x_i 2, x_i 3, ..., x_iXi where i is the TrCH number and Xi is the number bits. The F_i output bit sequences per TTI are denoted by y_i,ni 1, y_i,ni 2, y_i,ni 3, ..., y_i,ni X_i, where n i is the radio frame number in current TTI and Yi is the number of bits per radio frame for TrCH i. The output sequences are defined as follows:
y_i,n,k = x_i,((_ni - 1) ×_Yi ) +_k, n_i = 1 ... F_i, k = 1 ... Y_i
where
Y_i = ( X_i / F_i ) is the number of bits per segment.
The nith segment is mapped to the n_i th radio frame of the transmission time interval.
This model fires once per radio frame. Each firing, this model inputs a data block of one radio frame, and previous model (first interleaving) inputs a data block of one TTI. ADS will automatically fire this model multiple times, if necessary. For example, if TTI = 40 msec, this model will fire four times while the previous model fires once. To avoid mismatch, the pin SizeIn buffer is set according to TTI.
Each firing, one token is consumed by pin SizeIn; this token indicates the effective length of data block input at pin DataIn. After radio frame segmentation, the data block is output at pin DataOut, and a token is generated by pin DataOut to indicate the effective length of the output data block.
The DynTFSet parameter requires an integer array. The correct format is transport block size 1, transport block set size 1, transport block size 2, transport block set size 2, etc. The size of this array must be a multiple of 2, and the transport block set size must be a multiple of the relative transport block size.

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

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