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    • 专利摘要:
    uplink transmission apparatus and method for uplink minimal support mobile communication system. a base station includes a transmit path circuit for transmitting a link exchange to a subscriber station. the uplink pocket, indicating an mcs value for the first transmission codeword and a second mcs value for a second transmission codeword. the base station also includes a path circuit configured to receive a maximum uplink subframe from the subscriber station, the maximum uplink subframe having a first subset of layers used for the first codeword transmission and a second subset of layers used for second codeword transmission. ack/nack information and ri information are repeated in both the first and second subsets of layers, and cqi is spatially multiplexed in each subset of the first or second subset of layers. if the first mcs value is different from the second mcs value, the cqi is spatially multiplexed over the subset of layers having a higher mcs value.
    公开号:BR112012028708B1
    申请号:R112012028708-7
    申请日:2011-05-12
    公开日:2021-08-24
    发明作者:Myung Hoon Yeon；Jin Kyu Han；Ju Ho Lee；Young-Han Nam；Jianzhong Zhang
    申请人:Samsung Eletronics Co., Ltd；
    IPC主号:
    专利说明:

    [Technical Field]
    This disclosure relates to uplink transmission apparatus and a method for mobile communication system supporting uplink MIMO. [Background Technique]
    In long-term evolution uplink (LTE) as a next-generation mobile communication standard, only one codeword is transmitted through an antenna. Physical uplink shared channel (PUSCH) is used for uplink data transmission in such a system, and uplink control information (UCI) including a channel quality indicator (CQI), an indicator (RI) and a hybrid automatic repeat request acknowledgment (HARQ-ACK) is ported on the same PUSCH transmitted for the uplink data.
    Fig. 1 is a diagram illustrating a procedure for uplink data and UCI processing of a legacy LTE system at transport channel and physical channel levels. In Figure 1, reference numerals 101 to 110 denote processing steps in the transport channel, and reference numerals 111 to 115 denote processing steps in the physical channel.
    In the uplink of the legacy LTE system, a user equipment (UE) uses a single codeword and a single antenna, so that when the PUSCH and UCI are transmitted together, the UCI is mapped to a single codeword and then transmitted in a single layer.
    Referring to Fig. 1, the UE determines several encoded symbols for ACK or RI transmission, that is, the number of symbols for RI (channel coding RI) in step 107 and the number of symbols for ACK (ACK/NACK coding) in step 108. The UE also determines the number of encoded symbols for CQI transmission in the PUSCH, i.e., the number of symbols for CQI (channel coding CQI) in step 106.
    The UE appends a cyclic redundancy check (CRC) to the transport block (TB) in step 101 and segments the TB into code blocks and appends the CRC to each code block again in step 102. Then the UE performs a channel coding in step 103, a rate combination in step 104, and then concatenates the code blocks (code block concatenation) in step 105. Then the UE multiplexes the data (UL-SCH data ) and the CQI (data and control multiplexing) information in step 109.
    Next, the UE performs an interleaving (channel interlacing) on the uplink shared channel data (UL-SCH), the CQI, the RI and the ACK/NACK information (which are processed in steps 109, 107 and 108) at step 110.
    Fig. 2 is a diagram illustrating an uplink channel (UL) interleaver layer mapping relationship in the legacy LTE system. In Fig. 2, reference numeral 201 denotes an example symbol configuration of the UL channel interleaver, and reference numeral 202 denotes an example symbol configuration of layer No. 1. Referring to Fig. 2, the sequence of channel interleaver output bit as denoted by reference number 201 is mapped one by one into layer No. 1, as denoted by reference number 202 .
    Interlaced channel information is scrambled in step 111, modulated (modulation mapper) in step 112, transformed by a discrete Fourier transform (DFT) (transform precoder, transform domain) in step 113, mapped to resource ( resource element mapper) in step 114, and then transformed by the inverse fast Fourier transform (IFFT) for transmission in step 115. [Display] [Technical Issue]
    In the LTE system, the UE uses a single codeword and a single antenna for uplink transmission, as described above, so that when the data of the UCI is transmitted together in the PUSCH, the UCI is transmitted in the layer as mapped to the single codeword.
    Unlike legacy LTE system, UE can also use two codewords and up to four transmit antennas in Advanced LTE system (LTE-A). Therefore, when data and the UCI are transmitted together via the UL-SCH, the UCI can be mapped to one or two codewords.
    This means that the UE can transmit the UCI at multiple layers in the uplink of the LTE-A system.
    However, in the case where the transmitted UCI is unevenly distributed in the two layers, if the channel status is good for one layer but bad for the other, the UCI reception performance will likely be degraded, especially when this information is control is concentrated on the layer having a bad channel status. [Technical Solution]
    In order to solve the problems of prior art, this exposition provides a method for transmitting the CQI, RI, HARQ-ACK information constituting the UCI as equally distributed in multiple layers, especially when a single codeword is mapped to two layers of streaming.
    Also, this disclosure provides a method for transmitting the ported UCI with a single codeword mapped to two layers and two codewords mapped to multiple layers in an uplink channel of an LTE-A system supporting a multiple antenna transmission.
    This exposition provides a method for transmitting the UCI ported with a single codeword as evenly distributed in two layers. For this purpose, firstly an uplink interleaving operation taking into account the number of layers to which the codeword is mapped is exposed. Unlike the conventional uplink channel interleaver designed to take time and frequency into account, the uplink channel interleaver of this exhibit is designed to operate taking into account the number of layers as well as time and frequency. This exposure also exposes some necessary modification to a data and UCI processing procedure in the transport layer and the physical layer, in accordance with the exposed uplink channel interleaver. Second, a method for transmitting the UCI with interleavers to respective layers, when a single codeword is transmitted in two layers, is exposed. Also, this exposition exposes some modifications necessary for processing the UCI data at the transport layer and at the physical layer, in the case where each layer has a dedicated uplink channel interleaver.
    This exposition exposes a method for transmitting the UCI in multiple layers especially when two codewords are mapped to multiple layers.
    In accordance with an aspect of this disclosure, an uplink data multiplexing method for a mobile communication system includes receiving data multiplexed data and CQI, RI and ACK; channel interleaving of the multiplexed data, RI and ACK; modulating the interlaced channel data into a codeword composed of a plurality of symbols, and mapping an odd-numbered symbol sequence to a first layer and an even-numbered symbol sequence to a second layer.
    According to another aspect of this disclosure, an uplink data multiplexing method for a mobile communication system includes receiving data obtained by data multiplexing and CQI, RI and ACK; a channel interlacing of the multiplexed data, RI and
    ACKs to be evenly distributed in individual layers when taking into account a number of layers; modulating the interlaced channel data into codewords composed of a plurality of symbols; and mapping an odd-numbered symbol sequence into a first layer and an even-numbered symbol sequence into a second layer.
    According to another aspect of this disclosure, a method of uplink data multiplexing of a mobile communication system includes receiving data obtained by data multiplexing and CQI, RI and ACK; channel interleaving the multiplexed data, RI and ACK to be evenly distributed into individual layers in consideration of the number of layers for a first codeword; channel interleaving the multiplexed, RI and ACK data to be evenly distributed into individual layers by considering multiple layers for a second codeword; modulating the interlaced data into codewords composed of a plurality of symbols; mapping an odd-numbered symbol sequence of the first modulated codeword into a first layer; mapping an even numbered symbol sequence in the first modulated codeword to a second layer; mapping an odd-numbered symbol sequence from the second modulated codeword to a third layer; and mapping an even numbered symbol sequence from the second modulated codeword to a fourth layer.
    According to another aspect of this disclosure, a method of uplink data multiplexing of a mobile communication system includes time division multiplexing, when two codewords are being transmitted, ACK and RI symbols with data to be repeated on all layers and transmitted in a time-aligned manner; a channel interleaving for CQI to be transmitted in layers mapped to a codeword; modulating the interlaced channel data into codewords composed of a plurality of symbols; and mapping the modulated codewords into corresponding layers.
    In accordance with yet another aspect of this disclosure, an uplink data multiplexing apparatus of a mobile communication system includes a multiplexer for multiplexing coded channel data and CQI, an RI channel coder for channel coding. RI data, and an ACK channel encoder for ACK channel encoding, a channel interleaver for channel interleaving the multiplexed data, RI and ACK, a modulator for modulating the interlaced channel data into codewords composed of a plurality of symbols, and a layer mapper for mapping an odd numbered symbol sequence of the modulated codewords into a first layer and mapping an even numbered symbol sequence of the modulated codewords to a second layer.
    A base station is provided, the base station comprises a transmission path circuit configured to transmit an uplink grant to a subscriber station. The uplink grant indicates a first modulation and coding scheme (MCS) value for a first codeword transmission and a second MCS value for a second codeword transmission. The base station also includes a receive path circuit configured to receive a multiple input multiple output (MIMO) uplink subframe from the subscriber station, a MIMO uplink subframe having a first subset of layers used for the first codeword transmission and a second subset of layers used for the second codeword transmission. A negative acknowledgment/acknowledgement information (ACK/NACK) and a score indication information (RI) are repeated in the first set of layers and in the second subset of layers. A channel quality information (CQI) is spatially multiplexed into the first subset of layers or the second subset of layers. If the first MCS value is different from the second MCS value, the CQI will be spatially multiplexed into the subset of layers having a higher MCS value. If the first MCS value is the same as the second MCS value, the CQI will be spatially multiplexed into the first set of layers.
    A method of operating a base station is provided. The method includes transmitting an uplink grant to a subscriber station, the uplink grant indicating a first modulation and coding scheme (MCS) value for a first codeword transmission and a second MCS value for a second codeword transmission. The method also includes receiving a multiple input multiple output (MIMO) uplink subframe from the subscriber station, the MIMO uplink subframe having a first subset of layers used for the first codeword transmission. and a second subset of layers used for the second codeword transmission. A negative acknowledgment/acknowledgement information (ACK/NACK) and a score indication information (RI) are repeated in the first set of layers and in the second subset of layers. A channel quality information (CQI) is spatially multiplexed into the first subset of layers or the second subset of layers. If the first MCS value is different from the second MCS value, the CQI will be spatially multiplexed into the subset of layers having a higher MCS value. If the first MCS value is the same as the second MCS value, the CQI will be spatially multiplexed into the first set of layers.
    A subscriber station is provided. The subscriber station includes a receive path circuit configured to receive an uplink grant from a base station, the uplink grant indicating a first modulation and coding scheme (MCS) value for a first word transmission. of codeword and a second MCS value for a second codeword transmission. The subscriber station also includes a transmission path circuit configured to transmit a multiple input multiple output (MIMO) uplink subframe from the subscriber station, the MIMO uplink subframe having a first subset of used layers. for the first codeword transmission and a second subset of layers used for the second codeword transmission. A negative acknowledgment/acknowledgement information (ACK/NACK) and a score indication information (RI) are repeated in the first set of layers and in the second subset of layers. A channel quality information (CQI) is spatially multiplexed into the first subset of layers or the second subset of layers. If the first MCS value is different from the second MCS value, the CQI will be spatially multiplexed into the subset of layers having a higher MCS value. If the first MCS value is the same as the second MCS value, the CQI will be spatially multiplexed into the first set of layers.
    A method of operating a subscriber station is provided. The method includes receiving an uplink grant from a base station, the uplink grant indicating an uplink grant indicating a first modulation and coding scheme (MCS) value for a first codeword transmission. and a second MCS value for a second codeword transmission. The method also includes transmitting a multiple input multiple output (MIMO) uplink subframe from the subscriber station, the MIMO uplink subframe having a first subset of layers used for the first codeword transmission. and a second subset of layers used for the second codeword transmission. A negative acknowledgment/acknowledgement information (ACK/NACK) and a score indication information (RI) are repeated in the first set of layers and in the second subset of layers. A channel quality information (CQI) is spatially multiplexed into the first subset of layers or the second subset of layers. If the first MCS value is different from the second MCS value, the CQI will be spatially multiplexed into the subset of layers having a higher MCS value. If the first MCS value is the same as the second MCS value, the CQI will be spatially multiplexed into the first set of layers.
    A base station is provided. The base station includes a receive path circuit configured to receive a multiple input and multiple output (MIMO) uplink subframe from a subscriber station, the MIMO uplink subframe having a first subset of layers having a total number of layers L} used for the first codeword transmission carrying a negative acknowledgment/acknowledgement information (ACK/NACK) and a score indication information (RI), and a second subset of layers having a total number of L2 layers used for a second codeword transmission carrying an ACK/NACK information, an RI information and a channel quality information (CQI). A total number of NACK encoded symbols used to carry an ACK/NACK information is generated by repeating NACKI(JL' +L2~) encoded symbols through each of the layers and L2. A total number of NRI coded symbols used to carry an RI information is generated by repeating NR1/(Li+L2) coded symbols through each of the Lx and L2 layers, and a total number of Nce1 coded symbols is used for carrying CQI and NCQ1/L2 encoded symbols are mapped across each of the L2 layers.
    A method of operating a base station is provided. The method includes receiving a multiple input multiple output (MIMO) uplink subframe from a subscriber station, the MIMO uplink subframe having a first layer subset having a total number of Lx layers used for the first codeword transmission carrying a negative acknowledgment/acknowledgement information (ACK/NACK) and a score indication information (RI), and a second subset of layers having a total number of L2 layers used for a second transmission of codeword carrying an ACK/NACK information, an RI information and a channel quality information (CQI). A total number of NACK encoded symbols used to carry an ACK/NACK information is generated by repeating Nin/(L + £,) encoded symbols through each of the Lx and L2 layers. A total number of coded symbols used to carry an RI information is generated by repeating /(Lx +L2) coded symbols through each of the Lx and L2 layers, and a total number of NCQI coded symbols is used to carry CQI and NCQI/L2 encoded symbols are mapped through each of the L2 layers.
    A subscriber station is provided. The subscriber station includes a transmission path circuit configured to transmit a multiple input multiple output (MIMO) uplink subframe from a subscriber station, the MIMO uplink subframe having first layer subset having a total number of layers used for a first codeword transmission carrying a negative acknowledgment/acknowledgement information (ACK/NACK) and a score indication information (RI), and a second subset of layers having a total number of L2 layers used for a second codeword transmission carrying an ACK/NACK information, an RI information and a channel quality information (CQI). A total number of NACK encoded symbols used to carry an ACK/NACK information is generated by repeating NACK/(LX+L2) encoded symbols through each of the Lx and L2 layers. A total number of NR! encoded symbols used to carry an RI information is generated by repeating /(L} +L2) encoded symbols through each of the Lt and L2 layers, and a total number of NCQI encoded symbols is used to carry CQI and NCQI/ L2 encoded symbols are mapped across each of the L2 layers.
    A method of operating a subscriber station is provided. The method includes transmitting a multiple input multiple output (MIMO) uplink subframe from a subscriber station, the MIMO uplink subframe having first layer subset having a total number of layers used for a first codeword transmission carrying a negative acknowledgment/acknowledgement information (ACK/NACK) and a score indication information (RI), and a second subset of layers having a total number of L2 layers used for a second data word transmission. code carrying an ACK/NACK information, an RI information and a channel quality information (CQI). A total number of NACK encoded symbols used to carry an ACK/NACK information is generated by repeating NACK/(LX+Z2) encoded symbols through each of the Lx and L2 layers. A total number of coded symbols used to carry RI information is generated by repeating NR! /(Lx+L2) encoded symbols through each of the Lx and L2 layers, and a total number of NCQ encoded symbols] is used to carry CQI and NCQI/L2 encoded symbols are mapped through each of the L2 layers. [Advantageous Effects]
    This disclosure provides a method for transmitting the ported UCI with a single codeword mapped to two layers and two codewords mapped to multiple layers in an uplink channel of an LTE-A system supporting a multiple antenna transmission. [Description of Drawings]
    Figure 1 is a diagram illustrating a procedure for uplink data and UCI processing of a legacy LTE system at the transport channel and physical channel levels; Figure 2 is a diagram illustrating an amplitude relationship of uplink channel (UL) interleaver layer in legacy LTE system; Figure 3 is a diagram illustrating a mapping relationship between a single uplink channel interleaver and a single layer according to a first embodiment thereof. Figure 4 is a diagram illustrating a procedure of a transmitter processing data and a UCI in the transport and physical channels, according to a second embodiment of this disclosure; Figure 5 is a diagram illustrating a mapping relationship between a two-layer single uplink channel interleaver according to the second embodiment of this disclosure; Figure 6 is a diagram illustrating a procedure of a transmitter for processing of data and UCI in the transport and physical channels, according to a third embodiment of this disclosure; Figure 7 is a block diagram illustrating a configuration of a receiver for use in the second and third embodiments of this disclosure; Figure 8 is a Figure 9 is a diagram illustrating a layer uplink channel interleaving according to a fourth embodiment of this disclosure; Figure 9 is a diagram illustrating a procedure of a transmitter processing data and UCI in the transport and physical channels, according to the fourth Figure 10 is a block diagram illustrating a configuration of a receiver for use in the fourth embodiment of this disclosure; Figure 11 is a diagram illustrating a configuration of a channel interleaver when the ACK and RI symbols are repeated on all layers, according to a modality of this exposure; and Figure 12 is a diagram illustrating a CQI and data multiplexing according to an embodiment of this display. [Mode for the Invention]
    The modalities of this exhibition are described with reference to the associated formulas and drawings.
    Although the description is directed to the Evolved Universal Terrestrial Radio Access standards of 3GPP (EUTRA, also referred to as LTE) or E-UTRA Advancing (also referred to as LTE-A) below, this disclosure is not limited to this, but may be applied to other communication systems, based on similar technical background and channel formats with minor modifications, without deviating from the scope of this exposition, as understood by those skilled in the art.
    This exhibit exposes a method for transmitting a UCI ported in one codeword as mapped to two layers and a UCI ported in two codewords as mapped to multiple layers in the uplink of the LTE-Advanced system supporting multiple antennas. streaming.
    First, a method for transmitting the UCI carried in a codeword, as equally distributed over two layers, is exposed. For this purpose, an uplink channel interleaving operation that takes into account a number of layers to which the codeword is mapped is exposed. According to an embodiment of this disclosure, the uplink channel interleaver is designed to operate taking into account time, frequency, and the number of transmission layers. Also, some embodiments are set forth in the procedure for processing the data and UCI information of the transport layer and the physical layer in accordance with the exposed uplink channel interleaver.
    Second, a method for transmitting a single codeword in two layers with uplink channel interleavers responsible for respective transmission layers is disclosed. For the case where each layer is provided with a dedicated uplink channel interleaver, some modifications are exposed in the procedure for processing the UCI data and information.
    This exposition also exposes a method for transmitting UCI at multiple layers when two codewords are mapped to multiple layers. In LTE, a codeword and an antenna are used for the uplink, so that only one layer is used for transmitting the PUSCH carrying uplink control information (UCI). That is, only a 1-point broadcast is supported. Meanwhile, LTE-A supports up to two codewords and 4 transmit antennas, so up to 4 layers can be used for transmission. That is, a 4 score transmission is possible in the LTE-A system. In LTE-A system supporting up to two codewords and up to four antennas, the following scenario is possible. Stream Score 1CWO is mapped to layer 1 Stream score 2CWO is mapped to layer 1CW1 is mapped to layer 2 Stream score 3CWO is mapped to layer 1CW1 is mapped to layer 2 and to layer 3 Streaming Score 4CWO is mapped to layer 1 and to layer 2CW1 is mapped to layer 3 and to layer 4
    In the case where a codeword is mapped to a layer 1 for score 1 transmission, CWO is mapped to layer 1 or CW1 to layer 2 for score 2 transmission, and CWO to layer 1 for a score transmission 3, so that channel interleaver operation in LTE can be applied without modification.
    In the case where a codeword is mapped to two layers, CW1 is mapped to layer 2 and layer 3 for score transmission 3. CWO is mapped to layer 1 and layer 2 and CW1 is mapped to layer 3 and layer 4 for a 4 score transmission. When a codeword is mapped to two layers, the uplink channel interleaver operates as follows.
    Figure 3 is a diagram illustrating a mapping relationship between a single uplink channel interleaver and a single layer, in accordance with a first embodiment of this disclosure.
    Assuming a QPSK modulation is used in Fig. 3, Qm=2 , and the RI encoded symbol 307 is 2 bits long.
    In Figure 3, rl, r2, r3, r4, r5, r6, r7, r8, r9, r10, rll, rl2, rl3, rl4, rl5, and rl6 are title encoded symbol indices and arranged in the channel interleaver. uplink 301.
    Numbers 1 to 32 are the encoded symbol indices of CQI and arranged in uplink channel interleaver 301 as shown in Fig. 3. Assuming a QPSK modulation, the encoded symbols of CQI 304 consist of two bits. In interleaver 301 of Fig. 3, the first and second index bits make up the first encoded CQI symbol, the third and fourth index bits make up the second encoded CQI symbol, and so on, up to the thirty-first and thirty-second bits indexes constitute the sixteenth encoded symbol.
    In Fig. 3, numbers 33 to 96 are index bits constituting a coded block 0 and arranged as shown in uplink channel interleaver 301 and numbers 97 to 176 are index bits constituting a coded code block 1. Since QPSK is assumed in Fig. 3, coded symbol 305 of code block 0 consists of two bits. Also, code block 1 encoded symbol 306 consists of two bits.
    In Figure 3, the index bits of 147, 148, 149, 150, 155, 156, 157, 158, 163, 164, 165, 166, 171, 172, 173, and 174 making up the code block are overlaid by the bits of encoded ACKs. Since a QPSK modulation is assumed in Fig. 3, the encoded ACK symbol 308 consists of two bits. The positions of the index bits that are sequentially mapped to the encoded ACK bits are indicated by 163, 164, 173, 174, 171, 172, 165, 166, 147, 148, 157, 158, 155, 156, 149, and 150.
    In the case where channel interleaver 301 of Fig. 3 is used without modification, a codeword can be mapped to two layers as follows. Uplink channel interleaver 301 of Fig. 3 reads data down from the first column in symbol units. After all symbols in the first column are read completely, the symbols in the second column are read. In the first embodiment, Qm=2 and the symbols in uplink channel interleaver 301 have to be mapped to two layers (Layer #1 and Layer #2), as denoted by reference numerals 302 and 303, so that , if a mapping starts from the first column, the CQI symbol composed of the bits located at the positions indicated by 1 and 2 in the uplink channel interleaver 301 is first scrambled, modulated to a modulation symbol by the modulation mapper, and , then mapped to tier #1 first. The CQI symbol composed of the bits located at positions indicated by 25 and 26 in uplink channel interleaver 301 is first scrambled, modulated to a modulation symbol by the modulation mapper, and then mapped to layer No. 2 303 at first place. In Figure 3, the symbols in layer No. 1 and layer No. 2 are to be expressed as modulation symbols. For example, when Qm = 2, the QPSK modulation mapping is expressed by
    to 00 (symbol bits)
    for 01'
    to 10. and
    to 11.
    In this embodiment, however, the bit indices generated by the uplink channel interleaver 301 are used in place of the modulation symbols in order to explain how the indices are mapped to the layers.
    The symbol in code block 0, which is composed of the bits located at index positions 49 and 50 of uplink channel interleaver 301, is mapped to layer #1,302, and the symbol in code block 0, which is composed of the bits located at index positions 73 and 74 is mapped to Layer No. 2 303. The code block symbol 1, which is composed of the bits located at index positions 97 and 98 is mapped to the Layer No. 1 302, and the symbol in code block 1 which is composed of the bits located at index positions 121 and 122 is mapped to Layer No. 2 303. The symbol in code block 1, which is composed of the bits located at index positions 145 and 146 is mapped to Layer No. 1302, and the symbol in code block 1, which is composed of bits located at index positions 161 and 162, is mapped to Layer No. 2 303. After mapping the symbols of the first column of uplink channel interleaver 301 to ac Layer No. 1302 and Layer No. 2,303, the second column data of uplink channel interleaver 301 are mapped to Layer No. 1302 and Layer No. 2,303 as follows. The CQI symbol composed of the bits located at index positions 3 and 4 is mapped to layer No. 1302, and the CQI symbol composed of the bits located at index positions 27 and 28 is mapped to layer No. 2 303 Next, code block symbol 0, which is composed of the bits located at index positions 51 and 52, is mapped to layer No. 1302, and code block symbol 0, which is composed by the bits located at index positions 75 and 76, is mapped to layer No. 2 303. The code block symbol 1, which is composed of bits located at index positions 99 and 100, is mapped to layer No. 1 3 02, and the symbol in code block 1 which is composed of the bits located at index positions 1213 and 124 is mapped to Layer No. 2 303. The RI symbol composed of the bits located at positions r9 and r10 is mapped to layer No. 1 3 02, and the RI symbol composed of the bits located at positions r1 and r2 is mapped to layer of No. 2 303. If the symbols from interleaver 301 are mapped to layer No. 1302 and layer No. 2 303, as described above, the CQI bits will be unevenly distributed in layer No. 1302 and in layer #2 303. As shown in Figure 3, the CQI symbols are mapped to bit positions 1 to 24 in layer #1 and bit positions 25 to 32 in layer #2.
    In order to solve the unequal distribution problem of the first embodiment in which the encoded CQI symbols are distributed to layer No. 1 and layer No. 2 unequally, a second embodiment of this disclosure exposes a method of writing data to the uplink channel interleaver that takes into account the number of transmission layers.
    Figure 4 is a diagram illustrating a procedure of a transmitter processing data and UCI in the transport and physical channels according to the second modality of this presentation.
    A description can be made with equations as follows. In steps 407 and 408 of Fig. 4, the UE determines a number of encoded symbols 0 with Equation 1 for (15 transmission of RI or ACK. In equation 1, it is the number of bits of the ACK or RI, and the parameters are set as shown in Table 1.
    [Eq. 1]Table 1: parameter definitions used in equation 1

    A number of total encoded HARQ-ACK bits is calculated by Equation 2 where QACR denotes the number of total encoded ACK bits, denotes a number of bits per symbol (2 for QPSK, 4 for 16QAM, and 6 for 64QAM). A denotes a number of layers to which a codeword is mapped.
    For example, when
    Since
    is generated by the concatenation of the coded values from Table 3 and can be expressed by Equation 3.
    [Eq. 3]Table 2: 1-bit HARQ-ACK encoding
    Table 3: 2-bit HARQ-ACK encoding

    The vector sequence output of the ACK information value channel encoding can be expressed by Equation 4. Here,
    , and is processed according to Equation 5a.
    [Eq. 5a] In some modalities, it is processed according to Equation 5b as follows:
    In order to indicate the number of RI bits in total, Equation 6 is used in step 407 of Fig. 4, where QRI denotes a number of RI bits encoded in total, and Qr. denotes 20 a number of bits per modulation symbol (2 for QPSK, 4 for 16QAM, and 6 for 64QAM). JV denotes a number of layers to which a codeword is mapped.
    For example, when
    Since
    is generated by concatenating the coded values from table 5 and can be expressed by equation 7. In the case where the maximum RI score is 2, the coded values from table 4 are used.


    The vector sequence output of the RI information value channel encoding can be expressed by Equation 15 8. Here,
    and is processed according to Equation 9a. In equation 9a, a number of layers is taken into account.

    [Eq. 9a] In some modalities,
    and is processed according to Equation 9b as follows:
    end while.[Eq. 9b]In step 406 of Fig. 4 / the UE determines the UEdetermines the number of coded symbols Q! using Equation 10 for CQI transmission. Here, 0 denotes a number of bits of CQI,
    denotes the programmed bandwidth for PUSCH transmission in the current subframe and
    is a number of SC-FDMA symbols per subframe used in an initial transmission. The parameters are defined as shown in Table 6.
    [Eq. 10]

    In order to calculate the total CQI bits, Equation 11 is used. In equation 11, OcQ1 denotes the total number of encoded CQI bits, denotes the number of bits per symbol (2 for QPSK, 4 for 16QAM, and 6 for 64QAM). denotes the number of symbols encoded by Equation 10. A1 denotes the number of layers to which a codeword is mapped.
    The encoded CQI / PMI bits are expressed by Equation 12.
    Equation 12 is derived from Equation 13 and Table 7.
    [Eq. 13]Table 7: Base sequences for code (32, 0)
    The output sequence Qo> Qv is obtained by the cyclic repetition of using Equation 14.
    [Eq. 14] In Figure 4, a CRC is attached to each transport block (TB) in step 401. The attached CRC TB is segmented into code blocks and the CRC is attached to the individual code blocks again in step 402. In then a channel coding is performed on the CRC code blocks appended in step 403, a rate combination is performed on the coded channel code blocks in step 404, and then the coded channel code blocks are concatenated in the step 405. The UL-SCH data data of which the total number of encoded bits is G is expressed by Equation 15.
    [Eq. 15]The CQI data of which the total number of encoded bits is H322 can be expressed by Equation 16.
    [Eg. 16]
    In step 409 of Figure 4, the code blocks concatenated in step 405 and the CQI coded channel symbols in step 406 are multiplexed (data and control multiplexing) in step 409, and the vector sequence output of the multiplexed signal is expressed by Equation 17. In equation 17, (í -!- QCQT^ and & ~ . Equation 18 shows the vector sequence output process under the assumption of N transmission layers.
    [Eq. 17]
    (positioning of control information)
    end while. [Eq. 18]The input to the channel interleaver in step 410 of Figure 4 is expressed as shown in equation 19.
    [Eq. 19]The output bit sequence of channel interleaver 410 is obtained as follows. Step (1) :
    is allocated to a number of columns of the channel interleaver matrix. Step (2) :
    is allocated to a number of rows of the channel interleaver matrix when taking into account the number of layer bits. On here,
    takes into account the number of layers.
    Step (3) : RI values are written into the ^muz x Onuc channel interleaver according to Equation 20. The column set to be used is defined as shown in Table 8.
    [Eq. 20]Table 8: Column adjustment for entering scoring information
    Step (4): generate a matrix of Equation 21 for
    in
    , At this point, skip the part occupied by the RI in step (3).
    [Eq. 21] Step (5) : Overwrite the matrix generated in step (4) with HARQ-ACK values as in Equation 22. Column regulation is defined as shown in Table 9.
    [Eq. 22]Table 9: Column regulation for insertion of HARQ-ACK information

    Step (6): The bit sequence is read from the top of the first column of the transfer (via download) of 10 channel interleaver matrix, and then the next column after the previous column is read completely, until the last column is read completely. If ^n=2, the two bits positioned ahead of the Ur other bits among the four bits making up the symbol — in the channel interleaver will be mapped to column #1, and the two bits following the other bits among the four yrbits constituting the symbol — in the channel interleaver will be mapped to layer #2. If Qn~4' the four bits positioned ahead of the Mr other bits among the eight bits constituting the symbol — in the channel interleaver will be mapped to the column No. 1, and the four bits following the other bits among the eight yrbits constituting the symbol — in the channel interleaver they will be mapped to layer No. 2. If = 6 z the six bits positioned ahead of the other bits among the twelve bits making up the symbol — in the channel interleaver they will be mapped to column #1, and the six bits following the other bits out of the twelve Ur bits making up the symbol — in the channel interleaver they will be mapped to layer #2.
    Figure 5 is a diagram illustrating a mapping relationship between a single uplink channel interleaver and two layers, in accordance with the second embodiment of this disclosure.
    Assuming two layers 502 and 503, CP normal, and Qm~ %; the RI symbols 507 encoded in the second, fifth, eighth, and eleventh columns of the uplink channel interleaver 501 are written at the index positions of r1, r2, r3, r4, r5, r6, r7, r8, r9, r10 , rll, rl2, rl3, rl4, rl5, and rl6 as shown in figure 5. What is different from the first modality is that an encoded RI symbol consists of four bits in the second modality, when Qm = ^. This is because the channel interleaver 501 according to the second modality generates the symbol taking into account the number of layers -N.
    When the first symbol of the first column of the uplink channel interleaver 501 is generated, the bits of CQI 504 are written at index positions 1, 2, 3, and 4. When the first symbols of the second column are generated, the bits of CQI are written at index positions 5, 6, 7, and 8. In this way, the CQI bits are written at index positions 1 to 32. Uplink channel interleaver 501 writes the four bits that make up the first code 0 block symbol 501 at index positions 33, 34, 35, and 36 and the four bits of the next code 0 block symbol sequentially at index positions 93, 94, 95, and 96. Then the interleaver of uplink channel 501 writes the four bits that make up the first symbol 506 of codebook 1. As shown in FIG. 5, the bits of the first codebook symbols are sequentially written at index positions 97 to 176. moment, index positions rl, r2, r3, r4, r5, r6, r7, r8, r9, r10, rll, rl2, rl3, rl4, rl5, and rl6 occupied by the encoded RI bits are overwritten in the index position settings 149, 150, 151, 152, 153, 154, 155, 156, 165, 166, 167, 168, 169, 170, 171, and 172. At this time, the ACK bits are sequentially written to index positions 149, 150, 151, 152, 169, 170, 171, 172 , 165, 166, 167, 168, 153, 154, 155, and 156.
    In uplink channel interleaver 501, symbols are read down from the first column in symbol units. After all symbols in the first column are read, symbols in the next column are read. Since symbols are written in the channel interleaver under the two-layer hypothesis and Qn ~~ 2 in the second embodiment of this display, if the symbols are read from the first column to be mapped to the two-layer, the bits located in the positions of index 1 and 2 occupied by the first CQI symbol in uplink channel interleaver 501 will be scrambled (see step 411 of Figure 4), modulated into a modulation symbol (see step 412 of Figure 4), and then mapped to layer #2 503 (see step 413 of figure 4). In Figure 5, the symbols in layer #1 502 and layer #2 503 should actually be expressed as modulation symbols. For example, when
    the mapping of 1 1QPSK modulation is expressed by
    to 00 (bits of the symbol),
    to 01
    for 10' and
    to 11. In this embodiment, however, the bit indices generated by the downlink channel interleaver 501 are used in place of the demodulation symbols in order to explain how the indices are mapped to the layers.
    Bits located at index positions 49 and 50 occupied by the 0 code block data symbols in uplink interleaver 501 of Fig. 5 are scrambled in step 411 of Fig. 4, modulated into a modulation symbol in step 412 of Fig. 4 and mapped to layer #1 502 in step 413 of Figure 4 . Bits located at index positions 51 and 52 occupied by the 0 code block data symbols in uplink interleaver 501 of Fig. 5 are scrambled in step 411 of Fig. 4, modulated into a modulation symbol in step 412 of Fig. 4 and mapped to layer No. 3503 in step 413 of Fig. 4. Bits located at index positions 97 and 98 occupied by code block data symbols 1 in uplink interleaver 501 of Fig. 5 are scrambled in step 411 of Figure 4 , modulated into a modulation symbol at step 412 of Figure 4 and mapped to layer No. 1502 at step 413 of Figure 4. The bits located at index positions 99 and 100 occupied by the block data symbols of code 1 in uplink interleaver 501 of Fig. 5 are scrambled in step 411 of Fig. 4, modulated into a modulation symbol in step 412 of Fig. 4 and mapped to layer No. 2503 in step 413 of Fig. 4. The bits located in positions indexes 145 and 146 occupied by code block data symbols 1 in uplink interleaver 501 of Fig. 5 are scrambled in step 411 of Fig. 4, modulated into a modulation symbol in step 412 of Fig. 4 and mapped to the layer No. 1502 at step 413 of Fig. 4. Bits located at index positions 147 and 148 occupied by code block data symbols 1 in uplink interleaver 501 of Fig. 5 are scrambled at step 411 of Fig. 4, modulated into a modulation symbol at step 412 of Figure 4 and mapped to layer No. 2503 at step 413 of Figure 4.
    After all the symbols from the first column of the uplink channel interleaver 501 are read and mapped to the first column of layer #1502 and layer #2503, as follows. The CQI bits in symbols 504 located at index positions 5 and 6 occupied by the second CQI symbol in uplink channel interleaver 501 are scrambled in step 411 of Figure 4, modulated into a modulation symbol in step 412 of Figure 4 and mapped to layer No. 1502 in step 413 of Fig. 4. The CQI bits located at index positions 7 and 8 occupied by the second CQI symbol in uplink channel interleaver 501 are scrambled in step 411 of Fig. 4 , modulated into a modulation symbol in step 412 of Fig. 4 and mapped to layer No. 2503 in step 413 of Fig. 4. Then, the bits located at index positions 53 and 54 occupied by a code block symbol 0 are scrambled in step 411 of Fig. 4, modulated into a modulation symbol in step 412 of Fig. 4 and mapped to layer No. 1502 in step 413 of Fig. 4. Bits located at index positions 55 and 56 are scrambled in step 411 of figure 4, modulated into a modulation symbol in step 412 of Fig. 4 and mapped to layer No. 2503 in step 413 of Fig. 4. Bits located at index positions 101 and 102 occupied by a code block symbol 1 are scrambled in the step 411 of Figure 4, modulated into a modulation symbol at step 412 of Figure 4 and mapped to layer No. 1502 at step 413 of Figure 4. Bits located at index positions 103 and 104 are scrambled at step 411 of Figure 4 , modulated into a modulation symbol in step 412 of Figure 4 and mapped to layer No. 2503 in step 413 of Figure 4. The bits located at index positions RI and R2 occupied by an RI symbol in the interleaver of uplink channel 501 are scrambled in step 411 of Figure 4, modulated into a modulation symbol in step 412 of Figure 4 and mapped to layer No. 1502 in step 413 of Figure 4. Bits located at index positions R3 and R4 occupied by the RI symbol in the can-interleaver. uplink al 501 are scrambled at step 411 of Figure 4, modulated into a modulation symbol at step 412 of Figure 4 and mapped to layer No. 2503 at step 413 of Figure 4. In the same manner, all of the symbols of first to last column are mapped to layer #1 502 and layer #2 503.
    After being mapped to the transmission layers in step 413 of Figure 4, the codewords mapped to layer No. 1 are processed in the procedure of steps 414, 415, 416 and 417, and the codewords mapped to layer N ° 2 are processed in the procedure of steps 418, 415, 420 and 421. That is, after step 413, layer No. 1 502 and layer No. 2503 are transformed by DFT in steps 414 and 418, pre-coded by multiplying the precoding matrix in step 415, mapped to corresponding resources in steps 416 and 420, and then transmitted through respective antenna ports in the form of SC-FDMA signals in steps 417 and 421.
    In the second embodiment of this display, the channel interleaver calculates a number of symbols according to the number of layers, each symbol consisting of a number of bits equal to the value obtained by multiplying the number of bits of a modulation symbol with the number of transmission layers, and generating a symbol to be mapped to layer 1 by scrambling and modulating half the bits of a modulation symbol and another symbol to be mapped to layer 2 by scrambling and modulating the other half of the bits of the modulation symbol, whereby the CQI bits are transmitted as equally distributed in two layers.
    If a single codeword is to be mapped transmitted to a layer, this will be the case where CW No. 0 is mapped to layer No. 1 in the score 1 transmission, CW No. 0 is mapped to layer No. 1 in the transmission of score 2, CW No. 1 is mapped to layer No. 2, or CW No. 0 is mapped to layer No. 1, especially the case where CW No. 1 is mapped to layer No. 2 and layer #3 in transmission score 3 and CW No. 0 is mapped to layer No. 1 and layer No. 2 or CW No. 1 is mapped to layer No. 3 and layer No. 4 in transmission score 4 when a single codeword is mapped to two layers. With the method exposed in the second modality of this presentation, the interlacing and layer mapping operations are performed taking into account the number of transmission layers, so that it is possible to transmit control information as equally distributed in the transmission layers, regardless of the number of transmission layers to which the codeword is mapped.
    In a third modality of this exhibition, the UCI is carried with two code words. In the case where the two codewords are transmitted, all transmission layers are used for UCI transmission. Like the second mode, the third mode defines channel interleaver operations taking into account the number of layers per codeword and maps the codewords to the layers.
    Figure 6 is a diagram illustrating a procedure of a transmitter processing data and UCI in transport and physical channels according to the third modality of this presentation. Figure 6 shows how the UCI carried in the two codewords is mapped to all transmission layers.
    Referring to Fig. 6, the number of RI, ACK and CQI symbols per codeword and the number of bits of RI, ACK and CQI are derived by Equations 1, 2, 10 and 11, and the channel interleaving operations and layer mapping are identical to those of the second modality. In figure 6, CW No. 0 and CW No. 1 are different from each other in the number of RI, ACK and CQI symbols and in the RI, ACK and CQI bits, according to the modulation and coding scheme (MCS) of individual code words. In the case where a certain codeword is mapped to two transmission layers, RI, ACK and CQI are equally distributed in the layers to be transmitted. For example, when CW No. 0 is mapped to layer No. 1 and layer No. 2 and CW No. 1 is mapped to layer No. 3 and layer No. 4 in the score transmission 4, though the numbers of RI, ACK and CQI allocated to CW No. 0 and CW No. 1 are different from each other, the symbols of RI, ACK and CQI mapped to layer No. 1 and layer No. 2 are evenly distributed in layer N No. 1 and layer No. 2, and the RI, ACK, and CQI symbols mapped to layer No. 3 and layer No. 4 are evenly distributed in layer No. 3 and layer No. 4.
    In Figure 6, a CRC is appended to each transport block (TB) of CW No. 0 in step 601, and the TB with CRC appended is segmented into code blocks, and then the CRC is appended to the individual code blocks again in step 602. The code blocks have the channel coded in step 603, the rate combined in step 604 and are concatenated in step 605. The number of symbols of RI, ACK and CQI and bits of RI, ACK and CQI in steps 606, 607, 608 and 609 take into account the number of layers. Data symbols and UCI symbols are written in the uplink channel interleaver taking into account the number of layers in step 610. A scrambling is performed on CW No. 0 in step 611, and the initialization value Hnti is obtained by Equation 23. For CW No. 0, % is 0.
    [Eq. 23]
    In the case where CW No. 0 is mapped to two layers, a channel interleaver symbol consists of a number of bits equal to the value obtained by multiplying the number of layers and the number of bits of a symbol, so that one symbol of modulation is generated taking into account only the number of bits of a symbol in step 612. In the step of mapping codeword to layer 613, the symbols modulated by the channel interleaver are mapped to two layers sequentially. After that, a DFT is performed on the respective layer #1 and layer #2 at steps 614 and 618.
    Meanwhile, a CRC is appended to each transport block (TB) of CW #1 in step 622, and the TB with CRC appended is segmented into code blocks, and then the CRC is appended to individual code blocks of new in step 623. The code blocks have the channel coded in step 624, the rate combined in step 625 and are concatenated in step 626. The number of RI, ACK and CQI symbols and the RI, ACK and CQI bits in the steps 627, 628, 629 and 630 take the number of layers into account. Data symbols and UCI symbols are written in the uplink channel interleaver taking into account the number of layers in step 632. A scrambling is performed on CW cNo. 1 in step 634, and the initialization value '•' inti is obtained by Equation 23. For CW No. 1, it is 1. That is, the scramble initialization value is set to different values for CW No. 0 and CW No. 1. In the case where CW No. 1 is mapped to two layers, a channel interleaver symbol consists of a number of bits equal to the value obtained by multiplying the number of layers and the number of bits of a symbol, so that the modulation symbol is generated taking in only the number of bits of a symbol is considered in step 635. In the codeword span step for layer 636, the channel interleaver modulated symbols are mapped to two layers sequentially. After that, a DFT is performed on the respective layer No. 3 and layer No. 4 in steps 637 and 638.
    After being mapped to the corresponding layers and transformed by DFT in steps 614, 618, 637 and 638, CW No. 0 and CW No. 1 are pre-encoded in step 615.
    After being pre-encoded in step 615 of Fig. 6, the codewords are mapped to corresponding resources in steps 616, 620, 640 and 641 and then transmitted through respective antenna ports in the form of SC- signals. FDMA at steps 617, 621, 642 and 643.
    Figure 7 is a block diagram illustrating a receiver configuration for use in the second and third embodiments of this disclosure.
    Referring to Fig. 7, FFT 701 performs an FFT on the signal received via multiple antennas, and resource element demapper 702 demaps the resources. The precoding remover 703 performs a precoding remover on the signals received by the antenna ports, and the inverse discrete Fourier transform (IDFT) 704 performs one IDFT per layer. The codeword to layer mapper 705 performs a demapping on the signal transformed by the IDFT 704 to obtain symbols per codeword. The demodulation demapper 706 performs a demodulation on the symbols per layer, the descrambler 707 performs a descramble on the demodulated signals, and the deinterleaver 708 performs a deinterlace on the descrambled signals taking into account the number of layers per codeword. Decoder 709 performs decoding on the RI, ACK and CQI data and information.
    In the third embodiment of this disclosure, the codeword-to-layer mapping step 613 follows the modulation mapping step 612. Meanwhile, a fourth embodiment of this disclosure replaces the codeword-to-layer mapping step with a step of channel-by-layer interlacing.
    Figure 8 is a diagram illustrating uplink channel interleaving in accordance with the fourth embodiment of this disclosure. Figure 8 shows two uplink channel interleavers 811 and 812 for layer #1 and layer #2, respectively, to which a codeword is mapped.
    Figure 9 is a diagram illustrating a procedure of a transmitter processing data and UCI in transport and physical channels according to the fourth embodiment of this disclosure.
    In figure 9, a CRC is appended to a transport block (TB) in step 901, and the TB with CRC attached is segmented into code blocks so that the CRC is appended to each code block again in step 902 Then, the code blocks have the channel coded in step 903, the rate combined in step 904, and are concatenated in step 905. In step 906, the UE determines a number of coded symbols for CQI transmission. The coded bits constituting the code blocks are arranged in symbol units in accordance with the number of coded bits as denoted by the reference numbers 803, 804, 805, and 806. If —in Figure 8, the coded bits indexed by 33 to 176 constituting the code blocks will be mapped to the symbols by 2 bits. That is, the first symbol 813 of code block 803 is composed of two bits located at index positions 33 and 34, and first symbol 813 of code block 804 is composed of two bits located at index positions 35 and 36 , the second symbol of code block 803 is composed of two bits located at index positions 37 and 38, and the second symbol of code block 804 is composed of two bits located at index positions 39 and 40. In this way , symbols 814 of code blocks 805 and 806 are composed of bits that are allocated to symbols by 2 bits alternately. Code blocks 803 and 805 are used in data and control multiplexing for layer #1 in step 907 of Figure 9, and code blocks 804 and 806 are used in data and control multiplexing to Layer No. 2 in step 920 of Fig. 9. In steps 917, 918 and 919 of Fig. 9, the UE terminates a number of encoded symbols for CQI, ACK and RI transmissions, respectively.
    In figure 9, the number of RI and ACK symbols to be transmitted in each layer is calculated by Equation 24. The process can be explained with formulas as follows. The UE determines the number of coded symbols Q' for transmission of ACK and RI using Equation 24 in steps 908 and 909 of Fig. 9, respectively. In Equation 24, 0 denotes a number of Bits of ACK or RI, and the parameters are defined as shown in Table 10.
    [Eq. 24]Table 10: Definitions of parameters used in Equation 24


    In order to calculate the total number of HARQ-ACK bits to be transmitted in layer #1 and layer #2, Equation 25 is used. In Equation 25, OiCR denotes a number of bits per symbol (2 for QPSK, 4 for 16QAM, and 6 for 5 64QAM). A denotes a number of layers to which a codeword is mapped.
    In an example case in

    is 16. Since
    it's 16,
    is 10 generated by concatenating the encoded values from Table12 and can be expressed by Equation 26. In the case where 1 bit is needed for HARQ-ACK, the encoded value from Table 11 is used.
    [Eq. 26]Table 11: 1-Bit HARQ-ACK Encoding
    Table 12: 2-bit HARQ-ACK encoding

    Although the total number of bits for layer #1 and layer #2 is 16, the number of bits to be transmitted in each transmission layer is 8.
    In Figure 8, reference number 809 denotes 8 bits in ACK symbols 816 to be transmitted in layer #1, and reference number 810 denotes 8 bits to be transmitted in layer #2. Assuming the first two QQ bits eq, out of the 16 bits in Equation 26 are mapped to the first code block symbol 809 of Fig. 8, and the next two bits and #3 are mapped to the first code block symbol 810. 8-bit ACK is transmitted in both layer #1 and layer #2 and, as a consequence, a total of 16 bits of ACK information is transmitted.
    In order to express the total number of RI bits to be transmitted in layer #1 and layer #2, Equation 27 is used. In Equation 27, QR1 denotes the total number of RI bits encoded, and denotes a number of bits per symbol (2 for QPSK, 4 for 16QAM, and 6 for 64QAM). N denotes a number of layers to which a codeword is mapped.
    In an example case where
    is 16. Since
    is generated by concatenating the coded values from Table 14 and can be expressed by Equation 28. In the case where the maximum RI score is 2, the coded value from Table 13 is used.

    Although the total number of bits in layer #1 and layer #2 is 16, the number of bits to be transmitted in each transmission layer is 8.
    In Fig. 8, reference number 807 denotes 8 bits of RI in symbols 817 to be transmitted in layer No. 1, and reference number 808 denotes 8 bits of RI to be transmitted in layer No. 2. Assuming the first two bits q® and q^ among the 16 bits of Equation 28 are mapped to the first code block symbol 807 of Fig. 8 (referred to as r1 and r2), and the next two RI RIbits #2 and #3 are mapped to the first symbol of code block 808 (referred to as r3 and r4).
    Therefore, an 8-bit RI information is transmitted in both layer #1 and layer #2 and, as a consequence, a total of 16 bits of RI information is transmitted.
    In Fig. 9, the UE determines the number of encoded symbols Q' using Equation (29) for transmission of CQI in one layer. In Equation 29, 0 denotes a number of yrPUSCRbits of CQI, and SC denotes the programmed bandwidth 10 for PUSCH transmission in the current subframe and expressed NPLWH-mxità as the number of subcarriers. * SYMB denotes a number of SC-FDMA symbols per subframe, which is used in the initial transmission. The parameters used in Equation 29 are defined in Table 15.


    In order to calculate the total number of CQI bits to be transmitted in layer #1 and layer #2, Equation 30 is used. In Equation 30, @031 denotes the total number of encoded CQI bits, and denotes a number of bits per symbol (2 for QPSK, 4 for 16QAM, and 6 for 64QAM). Qlff denotes the number of encoded symbols. N denotes a number of layers to which a codeword is mapped.

    The encoded CQI/PMI bits can be expressed as in Equation 31.
    Equation 31 is derived from Equation 32 and Table 16.
    Table 16: Base sequences for a code (32, 0)
    Output sequence 51 is obtained by cyclically repeating the encoded CQI/PMI bits using Equation 33.
    [Eq. 33]In an example case where QcQI~~%, Qr. ~e N=2, QQQJ is 32. Although the total number of bits ^CQJ for layer #1 and layer #2 is 32, the number of bits to be transmitted in each transmission layer is 16. In the figure 8, reference number 801 denotes the 16 bits of CQI in symbols 815 to be transmitted in layer No. 1, and reference number 802 denotes the 16 bits of CQI to be transmitted in layer No. 2. Assuming the first two bits q® and among the 32 bits in Equation 33 are mapped to the first code block symbol 801 of Fig. 8 (referred to as indices 1 and 2), and the next two bits and #3 are mapped to the first symbol of code block 802 (referred to as indices 3 and 4). In this way, bits of information are mapped to two different layers alternately. Therefore, 16-bit CQI information is transmitted in both layer #1 and layer #2, and as a consequence, a total of 32 bits of CQI information is transmitted, the channel interleaver matrix for layer No. 1 is composed of the CQI information bits 801, the data information bits 803 and 805, the ACK information bits 809, and the RI information bits 807. The channel interleaver matrix for the Layer No. 2 is composed of the CQI information bits 802, the data information bits 804 and 806, the ACK information bits 810, and the RI information bits 808. The channel interleaver matrix is generated as defined by the Rel-8 standard.
    After channel interleaving for layer #1 is performed in step 910, each bit is scrambled in step 911, and the initial value Hnit used is shown in Equation 34.
    [Eq. 34]After the scrambling is performed, the scrambled signal is modulated into a modulation symbol by a modulation mapper in step 912, and then it is transformed by DFT in step 913. After a channel interleaving for layer No. 2 is performed in step 921, each bit is scrambled in step 922, and the initial value ^tnit is used as shown in Equation 35. Using Equation 35, it is set to 0 or 1 for layer #1 of CW #1. is set to 0 for the same CW to use the same scrambling initialization value, and it is set to 1 for the same CW to use different scrambling initialization values for respective layers.
    If the UCI stops transmitted on all layers to which two codewords are mapped, it will be set to 0 for layer #1 and layer #2 scrambling and to 1 for layer #3 and layer N scrambling ° 4. In another method, it can be set to 0 for layer No. 1 shuffle, 1 for layer No. 2 shuffle, 2 for layer No. 3 shuffle, and 3 for layer No. 4 shuffle. , a different shuffling can be applied to the individual layers.

    After a scrambling is performed, the scrambled signal is modulated into a modulation symbol in step 923, and DFT transformed in step 924. Then, the DFT transformed signals in steps 913 and 914 are precoded in step 914, mapped to the resource at steps 915 and 925, transformed by IFFT at steps 916 and 926, and then transmitted. Figure 10 is a block diagram illustrating a configuration of a receiver for use in the fourth modality of this exhibit. in Fig. 11, the ACK1105 symbols and the RI symbols 1104 are multiplexed with time domain (TDM) data in the sections for layer 2n 1108 and layer 2n+11107. The numbers of ACK and RI symbols are determined in the same way as described with the third modality, in which the ACK and the RI are distributed across all layers to which two codewords are mapped. The numbers of ACK and RI symbols can also be determined using Equation 36 with which the UE calculates the number of encoded symbols «. That is, the number of coded symbols mapped to individual layers & is calculated by taking into account the two codewords mapped to all layers. In Equation 36, denotes the number of bits of ACK or RI, and the parameters used in Equation 36 are defined in Table 17. Also shown in Figure 11 are coded symbols 1101 of CQI, coded symbols 1102 of code block 0, and coded symbols 1101 of code block

    CQI is passed in the layers to which a codeword is mapped. The number of CQI symbols can be determined according to a method for mapping the CQI to a selected codeword5 in the first and second embodiments. For a transmission of CQI, the UE determines the number of encoded symbols ®using Equation 37. In Equation 37, ® denotes the number of bits of CQI, and N denotes the number of layers for whichMPUSOfthe codewords carry the CQI. * sc denotes the bandwidth programmed for PUSCH transmission in the current subframe and is expressed as a number of subcarriers.
    denotes the number of SC-FDMA symbols per subframe used in an initial transmission, the parameters used in Equation 37 are defined in Table 18. In order to calculate the total number of CQI bits, Equation 38 is used. In Equation 38, it denotes the total number of encoded CQI bits, it is 2 for QPSK, 4 for /y'16QAM, and 6 for 64QAM. denotes the number of encoded symbols. N denotes the number of layers mapped to a codeword.

    CQI and data multiplexing can be performed with the methods described in the first and second embodiments. That is, the procedure for processing the transport and physical layers with an uplink channel interleaver is performed in the same way as described in the first and second embodiments. CQI and data multiplexing can be performed in another way, as described in figure 12. There is a case where the number of layers is not considered when calculating the total number of Q/bits QCQI and ° number of CQI symbols ° ® is odd, as shown in Equation 39. If the first modality method is used for this case, the CQI symbols will be unevenly distributed in different layers, and the second modality method cannot use Equation 39, because the number of layers must be taken into account. By writing the CQI 1201 symbols in the order as described in Figure 12 and by reading the CQI 1201 symbols from the first column for the case where the CQI symbols are mapped to two layers, the symbols 1, 3, 5 , 7, 9, and 11 are transmitted in the first layer, and CQI symbols 2, 4, 6, 8, and 10 are transmitted in the second layer. Also shown are encoded symbols 1202 from the code block.
    In order to extract a channel interleaver bit sequence for distributing the odd-numbered CQI symbols as evenly as possible,
    and assumed on to generate the matrix
    as shown in Equation 40. In Equation 40, , e is an output extracted by multiplexing data symbols and CQI symbols. In the matrix of Equation 40, the part that is already occupied by the RI symbols is skipped while writing the vector sequence into the matrix.
    The apparatus transmission method for uplink transmission in the LTE-Advanced system using two codewords and multiple transmit antennas according to an embodiment of this disclosure is capable of distributing a codeword mapped to two layers, the UCI information to two layers equally and, when two codewords are mapped to multiple layers, to all layers equally. In some embodiments of this exposure, uplink control information is mapped or allocated to a subset of Ns layers being transmitted uplink in an uplink MIMO subframe. This subset of layers could be implicitly referred to by the UE according to (1) the number of codewords; (2) the codeword-to-layer mapping structure; and (3) the codeword that uses a higher MCS value. For example, if N = 4 and layers 1, 2 are used for codeword 1 transmission, while layers 3, 4 are used for codeword 2 transmission, and if the MCS used by codeword 1 is better than the MCS used by codeword 2, then the user may decide to transmit a UL control information in layers 1 and 2, which correspond to the layers with the best MCS value. Therefore, for a CW transmission , the UCI is mapped to the layers of that CW. For a transmission of two CWs with different MCS value indicated by the UL grant, the UCI is mapped to the CW layers with the highest MCS value.
    Furthermore, for the case where two codewords have the same MCS, the following approaches are proposed:
    Method 1: The UE always maps the UCI into CWO (codeword 0, or the first codeword), which is mapped to layer 0 or layers 0 and dl, according to the CW to mapping table layer and the transmission score.
    Method 2: The UE always maps the UCI into CW1 (codeword 1 or the second codeword).
    Method 3: UE maps the UCI into CW1 (the second codeword) for the score transmission case 3 (3 tiers) and maps the UCI into CWO for the other score transmissions. The reason for the special treatment for score 3 is that in score 3 CWO is mapped to layer 0 and CW1 is mapped to layers 1 and 2. Therefore, it may be better to map UCI to CW with transmission in two layers, one as this provides more resources for UCI transmission. In some embodiments of this exposition, some UCI types are mapped to all N layers in the uplink in an uplink MIMO subframe, while other UCI types are mapped to a subset of N layers, where the number of layers in a subset is denoted by Ns. The types of UCIs that need more reliable reception in eNode B are mapped to all N layers. Some examples of the N-layer subset, where the subset has Ns layers, are: all layers in CWO; all layers in CW1 ;all layers in a CW having higher MCS; and a lower numbered layer in a CW having a higher MCS. In some embodiments, ACK/NACK and RI are mapped to all N layers, while CQI is mapped to a subset of N layers, where the subset is of size Ns, and where the subset corresponds to all layers in one of the two CWs. For example, CQI is mapped to all 2 layers in CWO, while ACK/NACK and RI are mapped to all 4 layers, in a 4-layer uplink transmission.
    used for A/N and RI, respectively, in the nth layer of the N layers are determined by a function of the modulation orders used for data transmission in the N layers,

    In particular, in 3GPP LTE and LTE-A systems, in the case of 2 CWs, two modulation orders can be used for data transmission in the N layers.
    layers corresponding to one CW use a Q1 modulation order, and[N/2]layers corresponding to another CW use another Q2 modulation order:
    Here' Q1 and Q2 May or may not be the same and Q1, Q2e{2,4,6} .
    In an example of the modulation order determination function for A/N and RI, a modulation order in each of the N layers follows the modulation order used for data transmission, ie, (n) =Q^a' a(n) and Qn (n) = Q^ala(_n) > For every n. Given a modulation order of each layer, A/N and RI can be encoded according to the methods described in Section 5.2.2.6 in 3GPP LTE 36.212 9.0.0, which is hereby incorporated by reference to the present application as if fully set forth herein. Although the present disclosure has been described by way of example, various changes and modifications may be suggested to one skilled in the technique. It is intended that this presentation encompasses such changes and modifications as they fall within the scope of the appended claims.
    权利要求:
    Claims (16)
    [0001]
    1. Base station characterized in that it comprises: a receive path circuit configured to receive a multiple-input and multiple-output uplink subframe (MIMO) from a subscriber station, the MIMO uplink subframe having a first subset of layers having a total number of L1 layers used for a first transmission of 10 codeword carrying a negative acknowledgment/acknowledgment information (ACK/NACK) and a score indication (RI) information, and a second subset of layers having a total number of L2 layers used for a second codeword transmission carrying an ACK/NACK information, an RI information and a channel quality information (CQI), wherein a total number of N ACK encoded symbols used to carry an ACK/NACK information is generated by the repetition of N ACK /(L1 + L2) encoded symbols through each of L1 and L2 layers20, where the information d and ACK / NACK is determined based on a sequence of vectors
    [0002]
    2. Base station, according to claim 1, characterized by the fact that the total number of N ACK encoded symbols used to carry an ACK /NACK information is generated by the repetition of N ACK /(L1 + L2) encoded symbols10, as if Follow:
    [0003]
    3. Base station, according to claim 1, characterized in that the total number of NRI encoded symbols used to carry an RI information is generated by the repetition of NRI /(L1 + L2) encoded symbols through each of the layers 30 L1 and L2 as follows:
    [0004]
    4. Base station, according to claim 1, characterized by the fact that the total number of N CQI encoded symbols is used to carry CQI and N CQI / L2 encoded symbols are mapped through each of the L2 layers as follows:
    [0005]
    5. Method of operating a base station, the method characterized in that it comprises: receiving a multiple-input multiple-output uplink subframe (MIMO) from a subscriber station, the MIMO uplink subframe having a first subset of layers having a total number of L1 layers used for a first 15 codeword transmission carrying a negative acknowledgment/acknowledgment information (ACK/NACK) and a score indication (RI) information, and a second subset of layers having a total number of L2 layers used for a second codeword transmission 20 carrying an ACK/NACK information, an RI information and a channel quality information (CQI), wherein a total number of N ACK encoded symbols used to carry an ACK/NACK information is generated by repeating N ACK /(L1 + L2) encoded symbols through each of L1 and L2 layers25, where the ACK information / NACK is determined based on a sequence of vectors.
    [0006]
    6. Method according to claim 5, characterized in that the total number of N ACK encoded symbols used to carry ACK15 / NACK information is generated by repeating N ACK /(L1 + L2) encoded symbols, as follows:
    [0007]
    7. Method according to claim 5, characterized in that the total number of NRI encoded symbols used to carry an RI information is generated by the repetition of NRI /(L1 + L2) encoded symbols through each of the L1 and L2 layers L2 as follows:
    [0008]
    8. Method according to claim 5, characterized in that the total number of NCQI encoded symbols is calculated as follows:
    [0009]
    9. Subscriber station characterized in that it comprises: a transmission path circuit configured for transmitting a multiple-input multiple-output uplink subframe (MIMO) to a base station, the MIMO uplink subframe having first subset of layers having a total number of L1 layers used for a first codeword 20 transmission carrying a negative acknowledgment/acknowledgment information (ACK/NACK) and a score indication (RI) information, and a second subset of layers having a total number of L2 layers used for a second codeword transmission carrying an ACK/NACK information, an RI information and a channel quality information (CQI), wherein a total number of N ACK encoded symbols used to carry an ACK/NACK information is generated by repeating N ACK /(L1 + L2) encoded symbols through each of L1 and L2 layers30, where the information d and ACK / NACK is determined based on a sequence of vectors
    [0010]
    10. Subscriber station according to claim 9, characterized in that the total number of encoded N ACK symbols used to carry an ACK/NACK information is generated by repeating
    [0011]
    11. Subscriber station according to claim 9, characterized in that the total number of encoded symbolsNRI used to carry an RI information is generated by the repetition of NRI /(L1 + L2) encoded symbols through each of the layers10 L1 and L2 as follows:
    [0012]
    12. Subscriber station according to claim 9, characterized by the fact that the total number of encoded symbolsN CQI is calculated as follows: 30 set i , j , k to 0
    [0013]
    13. A method of operating a subscriber station, the method characterized in that it comprises: 20 transmitting a multiple-input multiple-output uplink subframe (MIMO) from a subscriber station, the MIMO uplink subframe having first subset of layers having a total number of L1 layers used for a first transmission of 25 codeword carrying a negative acknowledgment/acknowledgment information (ACK/NACK) and a score indication (RI) information, and a second subset of layers having a total number of L2 layers used for a second codeword transmission carrying an ACK/NACK information, an RI information and a channel quality information (CQI), wherein a total number of N ACK encoded symbols used to carry an ACK/NACK information is generated5 by repeating N ACK /(L1 + L2) encoded symbols through each of L1 and L2 layers, where the ACK information / NACK is determined based on a sequence of vectors.
    [0014]
    14. Method according to claim 13, characterized in that the total number of N ACK encoded symbols used to carry an ACK25 / NACK information is generated by repeating N ACK / (L1 + L2) encoded symbols, as follows:
    [0015]
    15. Method according to claim 13, characterized in that the total number of NRI encoded symbols used to carry an RI information is generated by the repetition of NRI /(L1 + L2) encoded symbols through each of the layers L1 and L2 as follows:
    [0016]
    16. Method according to claim 13, characterized in that the total number of NCQI encoded symbols is calculated as follows: where QCQI denotes the total number of bits of encoded CQI, Qm denotes a number of bits per symbol, N denotes a total number of layersL2 , qj denotes a bit of encoded CQI, fi denotes a bit of encoded data, G denotes a total number of bits of encoded data, egk20 denotes an output of a data and control information multiplexing operation.
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    法律状态:
    2018-12-26| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
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    2020-03-17| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2021-06-08| B350| Update of information on the portal [chapter 15.35 patent gazette]|
    2021-07-06| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-08-24| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 12/05/2011, OBSERVADAS AS CONDICOES LEGAIS. PATENTE CONCEDIDA CONFORME ADI 5.529/DF, QUE DETERMINA A ALTERACAO DO PRAZO DE CONCESSAO. |
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