3 Definitions, symbols and abbreviations
25.2123GPPMultiplexing and channel coding (FDD)Release 17TS
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
Assisting secondary serving HS-DSCH Cell(s): In addition to the serving HS-DSCH cell, a cell in the secondary downlink frequency, where the UE is configured to simultaneously monitor a HS-SCCH set and receive HS-DSCH if it is scheduled in that cell. There can be up to two assisting secondary serving HS-DSCH cells.
Assisting serving HS-DSCH Cell: In addition to the serving HS-DSCH cell, a cell in the same frequency, where the UE is configured to simultaneously monitor a HS-SCCH set and receive HS-DSCH if it is scheduled in that cell.
Cell group: A group of (one, two, or three) Multiflow mode cells that have the same CPICH timing. The cells that belong to a cell group are indicated by higher layers.
DL FET: DL FET refers to early termination of DL DPCH transmission upon receiving an acknowledgement message. In this context, a DL FET ACK/NACK message represents an acknowledge message sent on UL DPCCH for DL FET.
DL_DCH_FET_Config: Higher layers signal this configuration parameter to indicate enhanced DCH physical layer configuration. The possible values are 0 and 1. The value 0 indicates Mode 0 configuration where DL transport channels concatenation and DL FET ACK/NACK signalling on UL are not configured. The value 1 indicates Mode 1 where DL transport channel concatenation and DL FET ACK/NACK signalling on UL are configured.
MIMO mode: This term refers to the downlink MIMO configuration with two transmit antennas
MIMO mode with four transmit antennas: This term refers to the downlink MIMO configuration with four transmit antennas
Multiflow mode: The UE is configured in Multiflow mode when it is configured with assisting serving HS-DSCH cell.
Primary uplink frequency: If a single uplink frequency is configured for the UE, then it is the primary uplink frequency. In case more than one uplink frequency is configured for the UE, then the primary uplink frequency is the frequency on which the E-DCH corresponding to the serving E-DCH cell associated with the serving HS-DSCH cell is transmitted. The association between a pair of uplink and downlink frequencies is indicated by higher layers.
Secondary uplink frequency: A secondary uplink frequency is a frequency on which an E-DCH corresponding to a serving E-DCH cell associated with a secondary serving HS-DSCH cell is transmitted. The association between a pair of uplink and downlink frequencies is indicated by higher layers.
TG: Transmission Gap is consecutive empty slots that have been obtained with a transmission time reduction method. The transmission gap can be contained in one or two consecutive radio frames.
TGL: Transmission Gap Length is the number of consecutive empty slots that have been obtained with a transmission time reduction method. 0 TGL 14. The CFNs of the radio frames containing the first empty slot of the transmission gaps, the CFNs of the radio frames containing the last empty slot, the respective positions Nfirst and Nlast within these frames of the first and last empty slots of the transmission gaps, and the transmission gap lengths can be calculated with the compressed mode parameters described in [5].
TrCH number: The transport channel number identifies a TrCH in the context of L1. The L3 transport channel identity (TrCH ID) maps onto the L1 transport channel number. The mapping between the transport channel number and the TrCH ID is as follows: TrCH 1 corresponds to the TrCH with the lowest TrCH ID, TrCH 2 corresponds to the TrCH with the next lowest TrCH ID and so on.
UL DPCH 10ms Mode: When configured by higher layers for the TTI to be transmitted [16], UL DPCH follows physical channel procedures specific to this mode. UL DPCH 10ms Mode can only happen when DL_DCH_FET_Config is configured.
UL 20ms Compression Interval (CI): A time interval of 20ms duration aligned to a 20ms TTI defined for UL DPCH physical layer procedures when DL_DCH_FET_Config is configured by higher layers.
1st secondary serving HS-DSCH cell: If the UE is configured with two uplink frequencies, the 1st secondary serving HS-DSCH cell is the secondary serving HS-DSCH cell that is associated with the secondary uplink frequency. If the UE is configured with a single uplink frequency, the 1st secondary serving HS-DSCH cell is a secondary serving HS-DSCH cell whose index is indicated by higher layers.
2nd secondary serving HS-DSCH cell: If the UE is configured with more than two serving HS-DSCH cells, the 2nd secondary serving HS-DSCH cell is a secondary serving HS-DSCH cell whose index is indicated by higher layers.
3rd secondary serving HS-DSCH cell: If the UE is configured with more than three serving HS-DSCH cells, the 3rd secondary serving HS-DSCH cell is a secondary serving HS-DSCH cell whose index is indicated by higher layers.
4th secondary serving HS-DSCH cell: If the UE is configured with more than four serving HS-DSCH cells, the 4th secondary serving HS-DSCH cell is a secondary serving HS-DSCH cell whose index is indicated by higher layers.
5th secondary serving HS-DSCH cell: If the UE is configured with more than five serving HS-DSCH cells, the 5th secondary serving HS-DSCH cell is a secondary serving HS-DSCH cell whose index is indicated by higher layers.
6th secondary serving HS-DSCH cell: If the UE is configured with more than six serving HS-DSCH cells, the 6th secondary serving HS-DSCH cell is a secondary serving HS-DSCH cell whose index is indicated by higher layers.
7th secondary serving HS-DSCH cell: If the UE is configured with eight serving HS-DSCH cells, the 7th secondary serving HS-DSCH cell is a secondary serving HS-DSCH cell whose index is indicated by higher layers.
3.2 Symbols
For the purposes of the present document, the following symbols apply:
x round towards , i.e. integer such that x x < x+1
x round towards –, i.e. integer such that x-1 < x x
x absolute value of x
sgn(x) signum function, i.e. 
Nfirst The first slot in the TG, located in the first compressed radio frame if the TG spans two frames.
Nlast The last slot in the TG, located in the second compressed radio frame if the TG spans two frames.
Ntr Number of transmitted slots in a radio frame.
Unless otherwise is explicitly stated when the symbol is used, the meaning of the following symbols is:
List of transport channels numbers i1, i2, …, iB, corresponding to downlink transport channels to be concatenated when DL_DCH_FET_Config = 1.
i TrCH number
j TFC number
k Bit number
l TF number
m Transport block number
ni Radio frame number of TrCH i.
p PhCH number
r Code block number
I Number of TrCHs in a CCTrCH.
Ci Number of code blocks in one TTI of TrCH i.
Fi Number of radio frames in one TTI of TrCH i, except for uplink when UL_DPCH_10ms_Mode is configured. In uplink, when UL_DPCH_10ms_Mode is configured, Fi is the number of radio frames in the transmission time interval of TrCH i divided by 2.
Mi Number of transport blocks in one TTI of TrCH i.
Ndata,j Number of data bits that are available for the CCTrCH in a radio frame with TFC j.
Number of data bits that are available for the CCTrCH in a compressed radio frame with TFC j.
P Number of PhCHs used for one CCTrCH.
PL Puncturing Limit for the uplink. Signalled from higher layers
RMi Rate Matching attribute for TrCH i. Signalled from higher layers, or determined as specified in clause 4.2.0.
Temporary variables, i.e. variables used in several (sub)clauses with different meaning.
x, X
y, Y
z, Z
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ARQ Automatic Repeat Request
BCH Broadcast Channel
BER Bit Error Rate
BLER Block Error Rate
BS Base Station
CCPCH Common Control Physical Channel
CCTrCH Coded Composite Transport Channel
CFN Connection Frame Number
CLTD Closed Loop Transmit Diversity
CRC Cyclic Redundancy Check
DCH Dedicated Channel
DL Downlink (Forward link)
DPCCH Dedicated Physical Control Channel
DPCCH2 Dedicated Physical Control Channel 2
DPCH Dedicated Physical Channel
DPDCH Dedicated Physical Data Channel
DS-CDMA Direct-Sequence Code Division Multiple Access
DTX Discontinuous Transmission
FACH Forward Access Channel
E-AGCH E-DCH Absolute Grant Channel
E-DCH Enhanced Dedicated Channel
E-DPCCH E-DCH Dedicated Physical Control Channel
E-DPDCH E-DCH Dedicated Physical Data Channel
E-HICH E-DCH Hybrid ARQ Indicator Channel
E-RGCH E-DCH Relative Grant Channel
E-RNTI E-DCH Radio Network Temporary Identifier
E-ROCH E-DCH Rank and Offset Channel
FDD Frequency Division Duplex
F-DPCH Fractional Dedicated Physical Channel
F-TPICH Fractional Transmitted Precoding Indicator Channel
FER Frame Error Rate
GF Galois Field
HARQ Hybrid Automatic Repeat reQuest
HS-DPCCH Dedicated Physical Control Channel (uplink) for HS-DSCH
HS-DPCCH2 Secondary Dedicated Physical Control Channel (uplink) for HS-DSCH, when Secondary_Cell_Enabled is greater than 3
HS-DSCH High Speed Downlink Shared Channel
HS-PDSCH High Speed Physical Downlink Shared Channel
HS-SCCH Shared Control Channel for HS-DSCH
MAC Medium Access Control
MBSFN MBMS over a Single Frequency Network
Mcps Mega Chip Per Second
MIMO Multiple Input Multiple Output
MS Mobile Station
OVSF Orthogonal Variable Spreading Factor (codes)
PCCC Parallel Concatenated Convolutional Code
PCH Paging Channel
PhCH Physical Channel
PRACH Physical Random Access Channel
RACH Random Access Channel
RSC Recursive Systematic Convolutional Coder
RV Redundancy Version
RX Receive
SCH Synchronization Channel
SF Spreading Factor
SFN System Frame Number
SIR Signal-to-Interference Ratio
SNR Signal to Noise Ratio
S-DPCCH Secondary Dedicated Physical Control Channel
S-E-DPCCH Secondary Dedicated Physical Control Channel for E-DCH
S-E-DPDCH Secondary Dedicated Physical Data Channel for E-DCH
S-E-RNTI Secondary E-RNTI
TF Transport Format
TFC Transport Format Combination
TFCI Transport Format Combination Indicator
TPC Transmit Power Control
TPI Transmitted Precoding Indicator
TrCH Transport Channel
TTI Transmission Time Interval
TX Transmit
UL Uplink (Reverse link)