JP2012170080A - Method and apparatus for transmitting channel quality control information in wireless access system - Google Patents

Abstract

The present invention provides a method for transmitting channel quality control information using two transmission blocks in a wireless access system that provides a hybrid automatic repeat request (HARQ).
In this method, a terminal receives a physical downlink control channel (PDCCH) signal including downlink control information (DCI) (S1910), and transmits channel quality control information using DCI. A step of calculating the required number (Q ′) of encoded symbols (S1920), and a step of transmitting channel quality control information based on the number of encoded symbols via a physical uplink shared channel (PUSCH) (S1940). Can be included.
[Selection] Figure 19

Description

  The present invention relates to a radio access system, and more particularly to a method and apparatus for transmitting uplink control information (UCI) including channel quality control information in a carrier aggregation environment (that is, a multi-component carrier environment). The present invention also relates to a method and apparatus for determining the number of resource elements allocated to UCI when UCI is piggybacked to data on an uplink shared channel (PUSCH).

  3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) Rel-8 or Rel-9 system (hereinafter LTE system) uses a single component carrier (CC) divided into multiple bands A multi-carrier modulation (MCM: Multi-Carrier Modulation) system is used. However, in 3GPP advanced LTE system (hereinafter LTE-A system), in order to provide a wider system bandwidth than LTE system, carrier aggregation (CA: A method such as Carrier Aggregation can be used. Carrier aggregation can also be referred to as carrier matching, multi-component carrier environment (Multi-CC) or multi-carrier environment.

  In a single CC environment that is not multi-CC like the LTE system, only the case where uplink control information (UCI) and data are multiplexed using a plurality of layers on one CC is described.

  However, one or more CCs can be used in the carrier aggregation environment, and the number of UCIs can be increased in multiples in proportion to the number of CCs used. For example, in the case of rank indication (RI) information, the LTE system has an information size of 2 bits to 3 bits. On the other hand, in the LTE-A system, since the entire bandwidth can be expanded to 5 CCs, the RI information can have an information bit size of up to 15 bits.

  In such a case, the UCI transmission method defined in the LTE system is not only capable of transmitting uplink control information having a large size of up to 15 bits, but is also a size that cannot be encoded by an existing Reed-Muller (RM) code. . Therefore, in the LTE-A system, a new transmission method for UCI having large size information is desired.

  The present invention has been made in view of the above points, and an object thereof is to provide a method for efficiently encoding and transmitting uplink control information in a multi-carrier environment (or a carrier aggregation environment).

  Another object of the present invention is to provide a method for determining the number of resource elements (REs) allocated to UCI when UCI is piggybacked on data on PUSCH.

  Still another object of the present invention is to transmit channel quality control information (CQI and / or PMI) when uplink control information is retransmitted using two or more transport blocks (TB). It is an object of the present invention to provide a method for obtaining the number of resource elements (RE) required for the above.

  Still another object of the present invention is to provide a terminal device and / or a base station device that provides the above method.

  The technical problem to be achieved by the present invention is not limited to the technical problem described above, and other technical problems that are not mentioned can be derived from the following embodiments of the present invention in the technical field to which the present invention belongs. Will be considered by those with ordinary knowledge.

  The present invention relates to a method and apparatus for transmitting uplink control information (UCI) including channel quality control information in a carrier aggregation environment.

  According to one aspect of the present invention, in a wireless access system that provides a hybrid automatic repeat request (HARQ), a method for transmitting channel quality control information using two transmission blocks includes: a terminal transmits downlink control information (DCI); Receiving a physical downlink control channel (PDCCH) signal, calculating a number (Q ′) of encoded symbols necessary for transmitting channel quality control information using DCI, Transmitting channel quality control information over a physical uplink shared channel (PUSCH) based on the number.

  In another aspect of the present invention, in a wireless connection system that provides a hybrid automatic repeat request (HARQ), a terminal that transmits channel quality control information using two transmission blocks includes a transmission module for transmitting a wireless signal, , A receiving module for receiving radio signals, and a processor for providing transmission of channel quality control information. Here, the terminal receives a physical downlink control channel (PDCCH) signal including downlink control information (DCI) and transmits the number of coded symbols (Q) required to transmit channel quality control information using DCI. ′) Can be calculated and channel quality control information can be transmitted via the physical uplink shared channel (PUSCH) based on the number of encoded symbols.

を用いて計算され，ＤＣＩには，チャネル品質制御情報を送信するための第１伝送ブロックに関する副搬送波の個数情報（Ｍ^{ＰＵＳＣＨ−ｉｎｉｔｉａｌ（ｘ）} _ＳＣ），第１伝送ブロックと関連する符号ブロックの個数に関する情報（Ｃ^（ｘ）），及び符号ブロックのサイズに関する情報（Ｋ^（ｘ） _ｒ）が含まれてもよい。ここで，‘ｘ’は，二つの伝送ブロックに対するインデクスを表す。 In these aspects of the present invention, the number of encoded symbols (Q ′) is given by the equation

In the DCI, the subcarrier number information (M ^{PUSCH-initial (x)} _SC ) related to the first transmission block for transmitting the channel quality control information, the code block associated with the first transmission block, Information about the number (C ^(x) ) and information about the size of the code block (K ^(x) _r ) may be included. Here, 'x' represents an index for two transmission blocks.

  In these aspects of the present invention, the first transmission block is preferably a transmission block having a high modulation and coding scheme (MCS) level among the two transmission blocks. However, if the modulation and coding scheme (MCS) levels of the two transmission blocks are the same, the first transmission block may be the first transmission block of the two transmission blocks.

  In the step of transmitting the channel quality control information, the UE can piggyback and transmit the channel quality control information to uplink data to be retransmitted using the HARQ scheme.

を用いて計算できる。 In this case, the terminal may further calculate information about the uplink data, and the information about the uplink data

Can be used to calculate.

  As yet another aspect of the present invention, a method for receiving channel quality control information using two transmission blocks in a wireless access system that provides a hybrid automatic repeat request (HARQ) includes: Transmitting a physical downlink control channel (PDCCH) signal including (DCI) and receiving the channel quality control information from a terminal via a physical uplink shared channel (PUSCH).

を用いて計算され，ＤＣＩには，チャネル品質制御情報を送信するための第１伝送ブロックに関する副搬送波の個数情報（Ｍ^{ＰＵＳＣＨ−ｉｎｉｔｉａｌ（ｘ）} _ＳＣ），第１伝送ブロックと関連する符号ブロックの個数に関する情報（Ｃ^（ｘ）），及び符号ブロックのサイズに関する情報（Ｋ^（ｘ） _ｒ）が含まれてもよい。ここで，‘ｘ’は，二つの伝送ブロックに対するインデクスを表す。 In this case, the number (Q ′) of encoded symbols necessary for transmitting the channel quality control information is given by

In the DCI, the subcarrier number information (M ^{PUSCH-initial (x)} _SC ) related to the first transmission block for transmitting the channel quality control information, the code block associated with the first transmission block, Information about the number (C ^(x) ) and information about the size of the code block (K ^(x) _r ) may be included. Here, 'x' represents an index for two transmission blocks.

  In still another aspect of the present invention, the first transmission block is preferably a transmission block having a high modulation and coding scheme (MCS) level among the two transmission blocks. However, if the modulation and coding scheme (MCS) levels of the two transmission blocks are the same, the first transmission block may be the first transmission block.

を用いて計算できる。 Here, the channel quality control information may be received by piggybacking on uplink data retransmitted using the HARQ scheme. In this case, information about uplink data

Can be used to calculate.

  The above aspects of the present invention are only a part of the preferred embodiments of the present invention, and various embodiments reflecting the technical features of the present invention have ordinary knowledge in the art. Will be derived and understood by those skilled in the art from the following detailed description of the invention.

  According to the embodiment of the present invention, the following effects can be obtained.

  First, uplink control information can be efficiently encoded and transmitted in a multi-carrier environment (or carrier aggregation environment).

  Second, when uplink control information is transmitted using two or more transmission blocks, the number of resource elements (RE) necessary for transmitting channel quality control information (CQI and / or PMI) is expressed as follows: Accurate calculation can be performed for each transmission block.

  Third, when CQI is piggybacked on PUSCH, the number of REs required to transmit CQI can be accurately calculated for each transmission block. In particular, when the initial resource values of the two transmission blocks are different due to HARQ retransmission or the like, the number of REs necessary for CQI / PMI transmission through the PUSCH can be accurately calculated.

  The effects obtained from the embodiments of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be obtained from the following description of the embodiments of the present invention. Those with ordinary knowledge in the field of technology to which they belong will be clearly derived and understood. That is, unintended effects in carrying out the present invention may be derived from the embodiments of the present invention by those who have ordinary knowledge in the technical field.

  The accompanying drawings are included as part of the detailed description to assist in understanding the invention and provide various embodiments relating to the invention. The accompanying drawings are used to explain the embodiments of the present invention together with the detailed description.

It is a figure for demonstrating the general signal transmission method using the physical channel used for 3GPP LTE system, and these channels. It is a figure for demonstrating the signal processing procedure for one structure of a terminal, and a terminal transmitting an uplink signal. It is a figure for demonstrating the signal processing procedure for one structure of a base station, and a base station transmitting a downlink signal. It is a figure for demonstrating one structure of a terminal, and SC-FDMA system and OFDMA system. It is a figure explaining the signal map system on the frequency domain for satisfying a single carrier characteristic in the frequency domain. It is a block diagram for demonstrating the transmission process of the reference signal for demodulating the transmission signal by SC-FDMA system. It is a figure which shows the symbol position where a reference signal is mapped in the sub-frame structure by SC-FDMA system. FIG. 6 shows a signal processing procedure in which DFT process output samples are mapped to a single carrier in cluster SC-FDMA. It is a figure which shows the signal processing procedure by which a DFT process output sample is mapped by multiple carriers in cluster SC-FDMA. It is a figure which shows the signal processing procedure by which a DFT process output sample is mapped by multiple carriers in cluster SC-FDMA. It is a figure which shows the signal processing procedure of division | segmentation SC-FDMA. FIG. 3 is a diagram illustrating an uplink subframe structure usable in an embodiment of the present invention. It is a figure which illustrates the processing procedure of UL-SCH data and control information which can be used in the Example of this invention. It is a figure which shows an example of the multiplexing method of the uplink control information and UL-SCH data on PUSCH. It is a figure which shows the multiplexing of the control information and UL-SCH data in a MIMO system. FIG. 6 is a diagram illustrating an example of a method of multiplexing and transmitting a plurality of UL-SCH transmission blocks and uplink control information at a terminal according to an embodiment of the present invention. FIG. 6 is a diagram illustrating an example of a method of multiplexing and transmitting a plurality of UL-SCH transmission blocks and uplink control information at a terminal according to an embodiment of the present invention. FIG. 6 is a diagram illustrating an example of a method for mapping physical resource elements to transmit uplink data and uplink control information. FIG. 5 is a diagram illustrating an example of a method for transmitting uplink control information as an embodiment of the present invention. It is a figure which shows the other example of the method of transmitting uplink control information as an Example of this invention. FIG. 21 is a diagram illustrating an apparatus capable of implementing the method described in FIGS. 1 to 20.

  Embodiments of the present invention provide a method and apparatus for transmitting and receiving uplink control information in a carrier aggregation environment (or multi-component carrier environment). Also disclosed are a method and apparatus for transmitting and receiving rank indication (RI) information and a method and apparatus for applying an error detection code to uplink control information.

  The following embodiment is a combination of the components and features of the present invention in a predetermined form. Each component or feature may be considered optional unless otherwise specified. Each component or feature may be in a form that is not combined with other components or features, and some of the components and / or features may be combined to form an embodiment of the present invention. The order of operations described in the embodiments of the present invention can be changed. Some configurations or features of one embodiment may be included in other embodiments, and may be replaced with corresponding configurations or features of other embodiments.

  In the description of the drawings, procedures or steps that are determined to obscure the gist of the present invention are omitted, and procedures or steps that can be understood by those skilled in the art are also omitted.

  In the present specification, embodiments of the present invention will be described focusing on data transmission / reception relationships between a base station and a mobile station. Here, the base station has a meaning as a terminal node of a network that directly communicates with the mobile station. In this specification, the specific operation described as being performed by the base station may be performed by an upper node of the base station in some cases.

  That is, various operations performed for communication with a mobile station in a network including a large number of network nodes including a base station are performed by a network node other than the base station or the base station. Here, the “base station” can be replaced by a term such as a fixed station, a node B, an extended node B (eNB), an advanced base station (ABS), or an access point.

  In addition, a terminal is a term such as a user equipment (UE), a mobile device (MS), a subscriber terminal (SS), a mobile subscriber terminal (MSS), a mobile terminal, or an advanced mobile station (AMS). It can be substituted.

  The transmitting end indicates a fixed and / or mobile node that provides a data service or a voice service, and the receiving end indicates a fixed and / or mobile node that receives a data service or a voice service. Therefore, in the uplink, the mobile station is the transmitting end and the base station is the receiving end. Similarly, in the downlink, the mobile station is the receiving end and the base station is the transmitting end.

  An embodiment of the present invention is an IEEE 802. XX system, 3GPP system, 3GPP LTE system, and 3GPP2 system are supported by the standard document, and in particular, embodiments of the present invention are 3GPP TS 36.211, 3GPP TS 36.212, 3GPP TS Supported by 36.213 and 3GPP TS 36.321 documents. That is, for those obvious steps or parts not described in the embodiments of the present invention, refer to these documents. All terms disclosed in this document can be explained by the above standard documents.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The detailed description disclosed below in connection with the appended drawings is intended as a description of exemplary embodiments of the present invention and is not intended to represent the only embodiments in which the present invention may be practiced.

  In addition, specific terms used in the embodiments of the present invention are provided to assist understanding of the present invention, and the use of these specific terms may be implemented in other forms without departing from the technical idea of the present invention. You may change to

  The following techniques are code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA) It can be used for various wireless connection systems.

  CDMA may be a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. TDMA may be a radio technology such as Global System for Mobile Communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rate for GSM Evolution (EDGE). OFDMA may be a radio technology such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, and evolved UTRA (E-UTRA).

  UTRA is part of the Universal Mobile Telecommunications System (UMTS). 3GPP LTE is part of Evolved UMTS (E-UMTS) using E-UTRA, adopting OFDMA in the downlink and SC-FDMA in the uplink. The LTE-A system is an improved system from the 3GPP LTE system. In order to clarify the technical features of the present invention, the embodiment of the present invention will be described focusing on the 3GPP LTE / LTE-A system, but can also be applied to an IEEE 802.16e / m system or the like. .

1.3 Outline of GPP LTE / LTE-A System In a wireless access system, a terminal receives information from a base station via a downlink (DL) and transmits information to the base station via an uplink (UL) . Information transmitted and received by the base station and the terminal includes general data information and various control information, and various physical channels exist depending on the type / use of information transmitted and received by both.

  FIG. 1 is a diagram for explaining a physical channel used in a 3GPP LTE system and a general signal transmission method using these channels.

  A terminal that is turned on again or enters a new cell performs an initial cell search operation such as synchronization with the base station in step S101. For this purpose, the terminal receives a primary synchronization channel (P-SCH) and a secondary synchronization channel (S-SCH) from the base station, synchronizes with the base station, and synchronizes the cell ID, etc. Get information about.

  Thereafter, the terminal can receive a physical broadcast channel (PBCH) signal from the base station and acquire broadcast information in the cell. Meanwhile, the UE can check the downlink channel state by receiving the DL reference signal (DLRS) in the initial cell search stage.

  In step S102, the terminal that has completed the initial cell search receives the physical downlink control channel (PDCCH) and the physical downlink shared channel (PDSCH) based on the physical downlink control channel information to obtain more specific system information. Can be obtained.

  Thereafter, in order to complete the connection to the base station, the terminal can perform a random access procedure as in steps S103 to S106. To this end, the terminal transmits a preamble via the physical random access channel (PRACH) (S103), and receives a response message for the preamble via the physical downlink control channel and the corresponding physical downlink shared channel. (S104). In contention-based random access, the terminal transmits an additional physical random access channel signal (S105) and collision resolution such as reception of a physical downlink control channel signal and a corresponding physical downlink shared channel signal (S106). A procedure (Contention Resolution Procedure) can be performed.

  The terminal that has performed the above procedure subsequently receives a physical downlink control channel signal and / or a physical downlink shared channel signal (S107) and performs physical uplink sharing as a general uplink / downlink signal transmission procedure. A channel (PUSCH) signal and / or a physical uplink control channel (PUCCH) signal may be transmitted (S108).

  Control information transmitted from the terminal to the base station is collectively referred to as uplink control information (UCI). UCI is hybrid automatic repeat request (HARQ) -acknowledgment (ACK) / negative acknowledgment (NACK), schedule request (SR), channel quality indication information (CQI), precoding matrix indicator (PMI), rank indication information ( RI) and the like.

  In the LTE system, UCI is mainly transmitted periodically via PUCCH. However, when control information and traffic data are to be transmitted simultaneously, UCI may be transmitted via PUSCH. Moreover, UCI may be transmitted aperiodically via PUSCH according to a network request / instruction.

  FIG. 2 is a diagram for explaining a structure of a terminal and a signal processing procedure for the terminal to transmit an uplink signal.

  In order to transmit the uplink signal, the terminal scramble module 210 can scramble the transmission signal using the terminal specific scramble signal. The scrambled signal is input to a modulation mapper 220, and two phase shift keying (BPSK), four phase shift keying (QPSK), or 16 quadrature amplitude modulation (QAM) / 64QAM depending on the type and / or channel state of the transmission signal. Modulated to complex symbols using a scheme. The modulated complex symbols are processed by transform precoder 230 and then input to resource element mapper 240, which can map the complex symbols to time-frequency resource elements. The signal processed in this way can be transmitted from the antenna to the base station via the SC-FDMA signal generator 250.

  FIG. 3 is a diagram for explaining a structure of a base station and a signal processing procedure for the base station to transmit a downlink signal.

  In 3GPP LTE system, a base station can transmit one or more codewords in the downlink. Each codeword can be made a complex symbol by the scramble module 301 and the modulation mapper 302 as in the uplink of FIG. Subsequently, the complex symbol is mapped to a plurality of layers by the layer mapper 303, and each layer is multiplied by the precoding matrix by the precoding module 304 and assigned to each transmission antenna. Each antenna-specific transmission signal thus processed can be mapped to a time-frequency resource element by the resource element mapper 305, and then transmitted from each antenna via the OFDMA signal generator 306.

  In a wireless communication system, when a terminal transmits a signal on the uplink, a peak-to-average power ratio (PAPR) becomes a problem as compared with a case where a base station transmits a signal on the downlink. Therefore, as described with reference to FIG. 2 and FIG. 3, the uplink signal transmission uses the SC-FDMA method, unlike the OFDMA method used for downlink signal transmission.

  FIG. 4 is a diagram for explaining a structure of a terminal, an SC-FDMA scheme, and an OFDMA scheme.

  3GPP systems (eg, LTE systems) employ OFDMA in the downlink and SC-FDMA in the uplink. Referring to FIG. 4, a terminal for uplink signal transmission and a base station for downlink signal transmission include a serial-parallel converter 401, a subcarrier mapper 403, an M-point IDFT module 404, and a cyclic prefix (CP). It is the same in that the additional module 406 is included.

  However, the terminal for transmitting a signal by the SC-FDMA method further includes an N-point DFT module 402. The N-point DFT module 402 cancels the influence of the IDFT processing of the M-point IDFT module 404 to some extent so that the transmission signal has a single carrier characteristic.

  FIG. 5 is a diagram for explaining a signal mapping method on the frequency domain for satisfying the single carrier characteristic in the frequency domain.

  FIG. 5A shows a local mapping method, and FIG. 5B shows a distributed mapping method. Here, the cluster, which is a modified form of SC-FDMA, divides the DFT process output samples into subgroups by subcarrier map processing, and discontinuously maps them in the frequency domain (or subcarrier domain).

  FIG. 6 is a block diagram for explaining reference signal (RS) transmission processing for demodulating a transmission signal by the SC-FDMA scheme.

  In the LTE standard (for example, 3GPP release 8), in the case of data, a signal generated in the time domain is converted into a frequency domain signal by DFT processing, and is transmitted after IFFT processing after subcarrier mapping (see FIG. 4). , RS omits the DFT processing, defines that it is generated directly in the frequency domain (S610), mapped onto the subcarrier (S620), and then transmitted after IFFT processing (S630) and CP addition (S640). .

  FIG. 7 is a diagram illustrating a symbol position to which a reference signal (RS) is mapped in a subframe structure based on the SC-FDMA scheme.

  FIG. 7A shows that RS is located in the fourth SC-FDMA symbol of each of two slots in one subframe in the case of normal CP. FIG. 7B shows that RS is located in the third SC-FDMA symbol of each of two slots in one subframe in the case of extended CP.

  FIG. 8 is a diagram illustrating a signal processing procedure in which DFT process output samples are mapped to a single carrier in cluster SC-FDMA. 9 and 10 are diagrams illustrating a signal processing procedure in which DFT process output samples are mapped to multiple carriers in cluster SC-FDMA.

  FIG. 8 shows an example in which intra-carrier cluster SC-FDMA is applied, and FIGS. 9 and 10 correspond to an example in which inter-carrier cluster SC-FDMA is applied. FIG. 9 shows an example in which a signal is generated with a single IFFT block when subcarrier spacings between adjacent component carriers are aligned in a situation where component carriers are continuously assigned in the frequency domain. Indicates. FIG. 10 illustrates a case where a signal is generated with a plurality of IFFT blocks in a situation where component carriers are allocated in a non-continuous manner in the frequency domain.

  FIG. 11 is a diagram illustrating a signal processing procedure of segmented SC-FDMA.

  In the divided SC-FDMA, the same number of IFFTs as the arbitrary number of DFTs are applied, so that the relationship between the DFT and the IFFT is one-to-one, and simply the DFT spreading of the existing SC-FDMA and the IFFT frequency sub-frequency. The carrier map configuration is extended and is also expressed as NxSC-FDMA or NxDFT-s-OFDMA. In the present specification, these are collectively referred to as divided SC-FDMA. Referring to FIG. 11, in order to relax the single carrier characteristic condition, the divided SC-FDMA collects the entire time domain modulation symbols into N (N is an integer greater than 1) groups, and performs DFT process in units of groups. I do.

  FIG. 12 illustrates an uplink subframe structure usable in the embodiment of the present invention.

  Referring to FIG. 12, the uplink subframe includes a plurality of (eg, two) slots. Each slot can include a different number of SC-FDMA symbols depending on the length of the CP. For example, in the case of regular CP, a slot can contain 7 SC-FDMA symbols.

  The uplink subframe is divided into a data area and a control area. The data area is an area where PUSCH signals are transmitted and received, and is used for transmitting uplink data signals such as voice. The control region is a region where a PUCCH signal is transmitted and received, and is used for transmitting uplink control information.

  The PUCCH includes RB pairs (for example, m = 0, 1, 2, 3) located at both ends of the data area on the frequency axis. Moreover, PUCCH is comprised by the RB pair located in the opposite end part (for example, RB pair of the position which carried out frequency reflection (frequency mirror)) on the frequency axis, and hops on a slot as a boundary. Uplink control information (ie, UCI) includes HARQ ACK / NACK, channel quality indication information (CQI), precoding matrix indicator (PMI), rank indication information (RI) information, and the like.

  FIG. 13 illustrates a processing procedure of UL-SCH data and control information that can be used in the embodiment of the present invention.

  Referring to FIG. 13, data transmitted through the UL-SCH is transmitted to the encoding unit in the form of a transmission block once for each transmission time interval (TTI).

Bit _a 0 of the transmission block transmitted from the upper layer _{(TB), a 1, a} 2, a 3, ..., a A-1 to the parity bit _{p 0, p 1, p 2} , p 3, ..., p L _-1 is added. At this time, the size of the transmission block is A, and the number of parity bits is L = 24 bits. An input bit to which a cyclic redundancy check bit (CRC) is added can be expressed as b ₀ , b ₁ , b ₂ , b ₃ ,..., B _B−1 , where B represents the number of bits of the transmission block including the CRC ( S1300).

b ₀ , b ₁ , b ₂ , b ₃ ,..., b _B-1 are segmented into a plurality of code blocks (CB) according to the TB size, and CRC is added to the plurality of divided CBs. Bits after code block division and CRC addition are C _r0 , C _r1 , C _r2 , C _r3 ,..., C _{r (Kr−1)} . Here, r is the code block number (r = 0,..., C-1), and _Kr is the number of bits in the code block r. C represents the total number of code blocks (S1310).

Subsequently, a channel encoding step is performed on C _r0 , C _r1 , C _r2 , C _r3 ,..., C _{r (Kr−1)} input to the channel encoding unit. The bits after channel coding are d ⁽ⁱ⁾ _r0 , d ⁽ⁱ⁾ _r1 , d ⁽ⁱ⁾ _r2 , d ⁽ⁱ⁾ _r3 , ..., d ⁽ⁱ⁾ _{r (Dr-1)} . Here, i is the index of the encoded data stream (i = 0, 1, 2), D _r denotes the number of bits of the i-th encoded data stream for code block r (Ie, D _r = K _r +4). r represents a code block number (r = 0, 1,..., C−1), and K _r represents the number of bits of the code block r. C represents the total number of code blocks. In the embodiment of the present invention, each code block can be channel-coded using a turbo coding method (S1320).

A rate matching stage is performed after the channel coding process. The bits after speed matching are _er0 , _er1 , _er2 , _er3 , ..., _{er (Er-1)} . Here, E _r represents the number of speed-matched bits of the r-th code block, r = 0, 1,..., C−1, and C represents the total number of code blocks (S1330). ).

Code block concatenation is performed after the speed matching process. The bits after the code block combination are f ₀ , f ₁ , f ₂ , f ₃ ,..., F _G−1 . Here, G represents the total number of encoded bits. However, when control information is multiplexed and transmitted with UL-SCH data, bits used for control information transmission are not included in G. f ₀ , f ₁ , f ₂ , f ₃ ,..., f _G−1 correspond to UL-SCH codewords (S 1340).

  Channel quality information (CQI and / or PMI), RI, and HARQ-ACK, which are uplink control information (UCI), are independently channel-coded (S1350, S1360, S1370). Channel coding for each UCI is performed based on the number of coded symbols for the respective control information. For example, the number of encoded symbols is used for speed matching of encoded control information. The number of encoded symbols corresponds to the number of modulation symbols, the number of REs, and the like in subsequent processing.

Channel coding of channel quality information (CQI) is performed using an o ₀ , o ₁ , o ₂ ,..., O _O-1 input bit sequence (S 1350). The output bit sequence of channel coding for channel quality information is q ₀ , q ₁ , q ₂ , q ₃ ,..., Q _QCQI-1 . Different channel coding schemes are applied to the channel quality information depending on the number of bits. If the channel quality information is 11 bits or more, CRC 8 bits are added. _QCQI represents the total number of coded bits for CQI. In order to adjust the length of the bit sequence Q _CQI, it is possible to speed matching the channel quality information encoded. Q _CQI = Q ′ _CQI × Q _m , Q ′ _CQI is the number of encoded symbols for CQI, and Q _m is the modulation order. Q _m is set equal to the UL-SCH data.

The RI channel coding is performed using the input bit sequence [o ^RI ₀ ] or [o ^RI ₀ o ^RI ₁ ] (S1360). [O ^RI ₀ ] and [o ^RI ₀ o ^RI ₁ ] mean 1-bit RI and 2-bit RI, respectively.

For 1-bit RI, repetition coding is used. In the case of 2-bit RI, a (3, 2) simplex code is used for encoding, and the encoded data can be cyclically repeated. In addition, RI of 3 bits or more and 11 bits or less is encoded using the (32, O) RM code used in the uplink shared channel, and a dual RM structure is used for RI of 12 bits or more. The RI information is divided into two groups, and each group is encoded using a (32, O) RM code. The output bit sequence q ^RI ₀ , q ^RI ₁ , q ^RI ₂ ,..., Q ^RI _QRI-1 is obtained by combining the encoded RI blocks. Here, Q _RI represents the total number of coded bits for RI. In order to match the length of the encoded _RI to the QRI, the last encoded RI block to be combined may be partial (ie, rate matched). Q _RI = Q ′ _RI × Q _m , where Q ′ _RI is the number of encoded symbols for RI and Q _m is the modulation order. Q _m is set equal to the UL-SCH data.

HARQ-ACK channel coding is performed using the input bit sequence [o ^ACK ₀ ], [o ^ACK ₀ o ^ACK ₁ ] or [o ^ACK ₀ o ^ACK ₁ ... O ^ACK _OACK-1 ] in _{step S1370} . [O ^ACK ₀ ] and [o ^ACK ₀ o ^ACK ₁ ] mean 1-bit HARQ-ACK and 2-bit HARQ-ACK, respectively. [O ^ACK ₀ o ^ACK ₁ ... O ^ACK _OACK-1 ] means HARQ-ACK composed of information of 2 bits or more (that is, O ^ACK > 2).

Here, ACK is encoded as 1 and NACK is encoded as 0. In the case of 1-bit HARQ-ACK, iterative coding is used. In the case of 2-bit HARQ-ACK, a (3, 2) simplex code is used, and the encoded data can be cyclically repeated. In addition, HARQ-ACK of 3 bits or more and 11 bits or less is encoded using the (32, O) RM code used in the uplink shared channel, and for HARQ-ACK of 12 bits or more, 2 bits are used. The HARQ-ACK information is divided into two groups using a double RM structure, and each group is encoded using a (32, O) RM code. Q _ACK represents the total number of coded bits for HARQ-ACK, and bit sequences q ^ACK ₀ , q ^ACK ₁ , q ^ACK ₂ ,..., Q ^ACK _QACK-1 are coded HARQ-ACK blocks. Is obtained by combining. In order to match the length of the bit sequence to the Q _ACK , the last combined HARQ-ACK block to be combined may be partial (ie, rate matched). Q _ACK = Q ′ _ACK × Q _m , Q ′ _ACK is the number of coded symbols for HARQ-ACK, and Q _m is the modulation order. Q _m is set equal to the UL-SCH data.

The input of the data / control information multiplexing block includes f ₀ , f ₁ , f ₂ , f ₃ ,..., F _G-1 and the encoded CQI / PMI bits, which mean the encoded UL-SCH bits. Meaning q ₀ , q ₁ , q ₂ , q ₃ ,..., Q _QCQI-1 (S1380). The outputs of the data / control information multiplexing block are g ₀ , g ₁ , g ₂ , g ₃ ,..., G _H−1 . g _i is a column vector of length Q _m (i = 0,..., H′−1). here,. g _i (i = 0,..., H′−1) represents a column vector having a length of (Q _m · N _L ). H = (G + N _L · Q _CQI ) and H ′ = H / (N _L · Q _m ). N _L represents the number of layers to which UL-SCH transport blocks are mapped, and H is assigned to N _L transmission layers to which transmission blocks are mapped for UL-SCH data and CQI / PMI information. This represents the total number of encoded bits. Here, H is the total number of coded bits allocated for UL-SCH data and CQI / PMI.

The channel interleaver performs channel interleaving processing on the encoded bits input to the channel interleaver. Here, the inputs of the channel interleaver are the outputs g ₀ , g ₁ , g ₂ , g ₃ ,..., G _H−1 of the data / control information multiplexing block, the encoded rank indicators q ^RI ₀ , q ^RI. ₁ , q ^RI ₂ ,..., Q ^RI _QRI-1 and encoded HARQ-ACK q ^ACK ₀ , q ^ACK ₁ , q ^ACK ₂ ,..., Q ^ACK _QACK-1 (S 1390).

In step S1390, g _i is a column vector of length Q _m for CQI / PMI, i = 0,..., H′−1 (H ′ = H / Q _m ). q ^ACK _i is a column vector of length Q _m for ACK / NACK, i = 0,..., Q ′ _ACK −1 (Q ′ _ACK = Q _ACK / Q _m ). q ^RI _i represents a column vector of length Q _m for RI, i = 0,..., Q ′ _RI −1 (Q ′ _RI = Q _RI / Q _m ).

  The channel interleaver multiplexes control information and / or UL-SCH data for PUSCH transmission. Specifically, the channel interleaver includes a process of mapping control information and UL-SCH data to a channel interleaver matrix corresponding to the PUSCH resource.

After channel interleaving, the bit sequence h ₀ , h ₁ , h ₂ ,..., _{H H + QRI-1} is output for each row from the channel interleaver matrix. The derived bit sequence is mapped onto the source grid.

  FIG. 14 is a diagram illustrating an example of a method of multiplexing uplink control information and UL-SCH data on PUSCH.

  When a terminal intends to transmit control information in a subframe to which PUSCH transmission is allocated, the terminal multiplexes uplink control information (UCI) and UL-SCH data before DFT-spreading. The uplink control information (UCI) includes at least one of CQI / PMI, HARQ-ACK / NACK, and RI.

The number of REs used for transmission of CQI / PMI, ACK / NACK and RI is based on MCS and offset values (Δ ^CQI _offset , Δ ^HARQ-ACK _offset , Δ ^RI _offset ) allocated for PUSCH transmission. The offset value allows different coding rates according to the control information, and is set semi-persistent by an upper layer (eg, RRC layer) signal. UL-SCH data and control information are not mapped to the same RE. The control information is mapped so that both slots of the subframe exist. Since the base station knows in advance that the control information is transmitted via the PUSCH, the control information and the data packet can be easily demultiplexed.

  Referring to FIG. 14, the CQI and / or PMI (CQI / PMI) resource is located at the head part of the UL-SCH data resource, and after being sequentially mapped to all SC-FDMA symbols on one subcarrier. , The next subcarrier is mapped. CQI / PMI is mapped from the left side to the right side in the subcarrier, that is, in the direction in which the SC-FDMA symbol index increases. The PUSCH data (UL-SCH data) is rate matched in consideration of the amount of CQI / PMI resources (that is, the number of encoded symbols). The same modulation order as UL-SCH data is used for CQI / PMI.

  For example, when the CQI / PMI information size (payload size) is small (for example, 11 bits or less), (32, k) block codes are used for CQI / PMI information as in PUCCH data transmission, and encoded data Can be cyclically repeated. CRC is not used when the CQI / PMI information size is small.

  When the CQI / PMI information size is large (for example, more than 11 bits), an 8-bit CRC is added, and channel coding and rate matching are performed using a tail-biting convolutional code. The ACK / NACK is inserted by puncturing into a part of the SC-FDMA resource to which the UL-SCH data is mapped. The ACK / NACK is located adjacent to the RS and is buried from the lower side to the upper side in the corresponding SC-FDMA symbol, that is, in the direction in which the subcarrier index increases.

  In the case of regular CP, as shown in FIG. 14, the SC-FDMA symbol for ACK / NACK is located in SC-FDMA symbol # 2 / # 4 in each slot. Regardless of whether or not ACK / NACK is actually transmitted in the subframe, the encoded RI is located adjacent to the symbol for ACK / NACK (ie, at symbols # 1 / # 5). Here, ACK / NACK, RI and CQI / PMI are encoded independently.

  FIG. 15 is a diagram illustrating multiplexing of control information and UL-SCH data in a MIMO (Multiple Input Multiple Output) system.

  Referring to FIG. 15, the terminal identifies the rank (n_sch) for UL-SCH (data portion) and the PMI associated therewith from the schedule information for PUSCH transmission (S1510). Also, the terminal determines a rank (n_ctrl) for UCI (S1520). Although not limited to this, the UCI rank is set to be the same as the UL-SCH rank (n_ctrl = n_sch). Thereafter, the data and the control channel are multiplexed (S1530). Subsequently, the channel interleaver performs data-CQI time-priority mapping, punctures the periphery of the DM-RS, and maps ACK / NACK / RI (S1540). Next, data and control channels are modulated according to the MCS table (S1550). The modulation scheme includes, for example, QPSK, 16QAM, and 64QAM. The order / position of the modulation blocks can be changed (eg, before multiplexing data and control channels).

  16 and 17 are diagrams illustrating an example of a method in which a plurality of UL-SCH transmission blocks and uplink control information are multiplexed and transmitted in a terminal according to an embodiment of the present invention.

  For convenience, FIGS. 16 and 17 assume a case where two codewords are transmitted, but FIGS. 16 and 17 are also applicable when one or more codewords are transmitted. Codewords and transport blocks correspond to each other and are used interchangeably herein. Since the basic processing is similar / similar to that described with reference to FIGS. 13 and 14, the description here will focus on portions related to MIMO.

  In FIG. 16, when two codewords are transmitted, channel coding is performed for each codeword (160). Also, speed matching is performed based on the given MCS level and resource size (161). The encoded bits can be scrambled in a cell specific, user equipment specific or codeword specific manner (162). Thereafter, a codeword pair hierarchy map is performed (163). This process may include hierarchical shifting or permutation.

  The code word pair hierarchy map performed in the function block 163 can be performed using the code word pair hierarchy map method shown in FIG. The position of precoding performed in FIG. 17 may be different from the position of precoding in FIG.

  Referring to FIG. 16, control information such as CQI, RI, and ACK / NACK is channel-coded into a channel coding block (165) according to a given specification. Here, CQI, RI, and ACK / NACK may be encoded using the same channel code for all codewords, or may be encoded using different channel codes for each codeword.

  Thereafter, the number of encoded bits can be changed by the bit size control unit 166. The bit size control unit 166 may be integrated with the channel coding block 165. The signal output from the bit size control unit is scrambled (167). Here, scrambling can be performed for cell specification, layer specification, codeword specification, or user device specification.

  The bit size control unit 166 can operate as follows.

  (1) The bit size control unit recognizes the rank (n_rank_push) of data with respect to the PUSCH.

  (2) The control channel rank (n_rank_control) is set to be the same as the data rank (that is, n_rank_control = n_rank_push), and the number of bits for the control channel (n_bit_ctrl) is multiplied by the rank of the control channel. Is expanded.

  One way to do this is to simply duplicate the control channel and repeat it. In this case, the control channel may be an information level before channel coding or an encoded bit level after channel coding. For example, when n_bit_ctrl = 4 control channels [a0, a1, a2, a3] and n_rank_push = 2, the expanded number of bits (n_ext_ctrl) is [a0, a1, a2, a3, a0, a1, a2 , A3] and 8 bits.

  As another method, a circular buffer method can be applied so that the number of bits (n_ext_ctrl) that can be expanded as described above becomes 8 bits.

  When the bit size control unit 166 and the channel encoding unit 165 are configured as a single unit, the encoded bits apply channel encoding and rate matching defined in the existing system (for example, LTE Rel-8). May be generated.

  In addition to the bit size control unit 166, bit level interleaving may be performed in order to provide further randomization for each layer. Alternatively, interleaving may be performed at the modulation symbol level equally.

  Control information (or control data) related to the CQI / PMI channel and two codewords can be multiplexed by a data / control information multiplexer 164. Thereafter, the ACK / NACK information is mapped to REs around the uplink DM-RS in each of the two slots in one subframe, and the channel interleaver 168 performs CQI / PMI according to the time priority map method. Map.

  Thereafter, the modulation mapper 169 modulates each layer, the DFT precoder 170 performs DFT precoding, the MIMO precoder 171 performs MIMO precoding, and the resource element mapper 172 sequentially performs RE maps. Thereafter, the SC-FDMA signal generator 173 generates an SC-FDMA signal and transmits the generated control signal from the antenna port.

  The functional blocks described above are not limited to the positions shown in FIG. 16, and the positions can be changed depending on circumstances. For example, the scramble blocks 162 and 167 may be positioned next to the channel interleave block. Also, the codeword pair hierarchy map block 163 may be located next to the channel interleave block 168 or next to the modulation mapper block 169.

2. Multi-carrier aggregation environment The communication environment considered in the embodiment of the present invention includes all multi-carrier provision environments. That is, the multi-carrier system or the carrier aggregation system used in the present invention refers to one or more component carriers (CC) having a bandwidth smaller than the target bandwidth when the target broadband is configured in order to provide a broadband. ) Are aggregated or aggregated and used.

  In the present invention, multi-carrier means carrier aggregation (or carrier combination), where carrier aggregation means not only coupling between adjacent carriers but also coupling between non-adjacent carriers. . Also, the carrier combination can be mixed with terms such as carrier aggregation and bandwidth combination.

  The multi-carrier (that is, carrier aggregation) configured by combining two or more component carriers is aimed to provide up to 100 MHz bandwidth in the LTE-A system. When combining one or more carriers having a bandwidth smaller than the target bandwidth, the bandwidth of the combined carriers is limited to the bandwidth used in the existing system in order to maintain backward compatibility with the existing IMT system. Sometimes.

  For example, the existing 3GPP LTE system provides {1, 4, 3, 5, 10, 15, 20} MHz bandwidth, and the 3GPP advanced LTE system (ie, LTE-A) provides the above-mentioned LTE A bandwidth greater than 20 MHz is provided using only the bandwidth of. In addition, the multi-carrier system used in the present invention may define a new bandwidth and provide carrier coupling (that is, carrier aggregation) regardless of the bandwidth used in the existing system.

  The LTE-A system uses the concept of cells to manage radio resources. A cell is defined as a combination of a downlink resource and an uplink resource, and the uplink resource is not an essential element. Therefore, the cell can be configured with a single downlink resource or both a downlink resource and an uplink resource. When multi-carrier (ie, carrier combining or carrier aggregation) is provided, the link between the downlink resource carrier frequency (or DLCC) and the uplink resource carrier frequency (or ULCC) is: It can be indicated by system information (SIB).

  The cells used in the LTE-A system include a primary cell (PCell: Primary Cell) and a secondary cell (SCell: Secondary Cell). The P cell means a cell operating on a primary frequency (eg, PCC), and the S cell means a cell operating on a secondary frequency (eg, SCC). However, only one P cell is assigned to a specific terminal, and one or more S cells are assigned.

  The P cell is used when the terminal executes an initial connection establishment procedure or a connection re-establishment procedure. The P cell may refer to a cell indicated in the handover process. The S cell is configurable after the RRC connection is established and is used to provide additional radio resources.

  The P cell and the S cell can be used as service providing cells. In the case of a terminal that is in the RRC_CONNECTED state but does not have carrier wave coupling or does not provide carrier wave coupling, there is only one service providing cell composed of only P cells. On the other hand, in the case of a terminal that is in the RRC_CONNECTED state and is configured with carrier wave coupling, one or more service providing cells can exist, and the entire service providing cell includes a P cell and one or more S cells.

  After the initial security activation process starts, the E-UTRAN can configure a network including one or more S cells in addition to the P cell initially configured in the connection establishment process. In a multi-carrier environment, the P cell and S cell can operate as respective component carriers. That is, multi-carrier aggregation can be defined as a combination of a P cell and one or more S cells. In the following embodiments, the primary component carrier (PCC) may be used in the same meaning as the P cell, and the secondary component carrier (SCC) may be used in the same meaning as the S cell.

3. TECHNICAL FIELD Embodiments of the present invention relate to a channel coding method for UCI, a resource allocation method for UCI, and a UCI transmission method when UCI is piggybacked to data on PUSCH in a carrier aggregation environment. is there. Embodiments of the present invention can basically be applied to a SU-MIMO environment, and can also be applied to a single antenna transmission environment as a special case of SU-MIMO.

3.1 UCI Allocation Location on PUSCH FIG. 18 is a diagram illustrating an example of a method for mapping physical resource elements in order to transmit uplink data and uplink control information (UCI).

  FIG. 18 shows a method of transmitting UCI in the case of 2 codewords and 4 layers. In this case, the CQI is mapped using the same modulation order and all constellation points as the data to the remaining REs except for the REs that are combined with the data and mapped by the time-first map method. In SU-MIMO, CQI is spread by one codeword and transmitted. For example, CQI is transmitted by a codeword having a high MCS level out of two codewords, and is transmitted by codeword 0 when the MCS levels are the same.

  The ACK / NACK is arranged while puncturing the combination of CQI and data already mapped to symbols located on both sides of the reference signal. Since the reference signal is located at the 3rd and 10th symbols, it is mapped to the upper side starting from the lowest subcarrier in the 2nd, 4th, 9th and 11th symbols. At this time, ACK / NACK symbols are mapped in the order of 2, 11, 9, 4 symbols.

  The RI is mapped to a symbol adjacent to the ACK / NACK, and is mapped before any information (data, CQI, ACK / NACK, RI) transmitted to the PUSCH. Specifically, the RI is mapped to the upper side starting from the lowest subcarrier of the first, fifth, eighth and twelfth symbols. At this time, the RI symbols are mapped in the order of the 1st, 12th, 8th and 5th symbols.

  In particular, ACK / NACK and RI are mapped by QPSK using only the four corners of the constellation when the information bit size is 1 bit or 2 bits, and for information bits of 3 bits or more. For example, all constellations having the same modulation order as the data may be used for mapping. Also, ACK / NACK and RI transmit the same information using the same resource at the same position in all layers.

3.2 Calculation of number of coded modulation symbols for HARQ-ACK bit or RI-1
In the embodiment of the present invention, the number of modulation symbols may be used in the same meaning as the number of encoded symbols or the number of REs.

Control information or control data is input in the form of channel quality information (CQI and / or PMI), HARQ-ACK, and RI into a channel coding block (eg, S1350, S1360, S1370 in FIG. 13 or 165 in FIG. 16). Is done. Different coding rates are applied according to control information by assigning different numbers of coded symbols for transmission of control information. When control information is transmitted on PUSCH, control information bits o ₀ , o ₁ , o ₂ ,..., O _o regarding HARQ-ACK, RI and CQI (or PMI), which are uplink channel state information (CSI). _The channel coding for _-1 is performed independently.

式１において，ＡＣＫ／ＮＡＣＫ（又はＲＩ）のためのリソース要素の個数は，符号化された変調シンボルの個数（Ｑ’）と表現することができる。ここで，Ｏは，ＡＣＫ／ＮＡＣＫ（又はＲＩ）のビット数を表し，β^{ＨＡＲＱ‐ＡＣＫ} _{ｏｆｆｓｅｔ}，β^ＲＩ _{ｏｆｆｓｅｔ}はそれぞれ，伝送ブロックに応じた送信符号語の個数によって決定される。ここで，データとＵＣＩとのＳＮＲ差を考慮するためのオフセット値を設定するためのパラメータはそれぞれ，β^{ＰＵＳＣＨ} _{ｏｆｆｓｅｔ}＝β^{ＨＡＲＱ‐ＡＣＫ} _{ｏｆｆｓｅｔ}，β^{ＰＵＳＣＨ} _{ｏｆｆｓｅｔ}＝β^ＲＩ _{ｏｆｆｓｅｔ}と定められる。 When the terminal transmits ACK / NACK (or RI) information bits on the PUSCH, the number of resource elements for ACK / NACK (or RI) per layer can be calculated by Equation 1 below.
(Formula 1)

In Equation 1, the number of resource elements for ACK / NACK (or RI) can be expressed as the number (Q ′) of encoded modulation symbols. Here, O represents the number of ACK / NACK (or RI) bits, and β ^HARQ-ACK _offset and β ^RI _offset are respectively determined by the number of transmission codewords corresponding to the transmission block. Here, parameters for setting an offset value for considering an SNR difference between data and UCI are defined as β ^PUSCH _offset = β ^HARQ-ACK _offset and β ^PUSCH _offset = β ^RI _offset , respectively.

ここで，Ｎ_ＳＲＳは，端末が，初期送信のための同一サブフレーム内でＰＵＳＣＨ及びＳＲＳを送信する場合，又は初期送信のためのＰＵＳＣＨリソース割当がセル特定ＳＲＳのサブフレーム及び周波数帯域幅と部分的に重なる場合に，１に設定され，それ以外の場合は，０に設定される。 M ^PUSCH _SC is the number of subcarriers that represents the bandwidth allocated (scheduled) for PUSCH transmission within the current subframe for a transmission block. N _{^{PUSCH-initial} symb} denotes the initial PUSCH number of SC-FDMA symbols per transmission sub-frame for the same transport ^{block, M PUSCH-initial} _SC is per subframe for the initial PUSCH transmission sub Represents the number of carriers. N ^{PUSCH-initial} _sym can be calculated by the following equation 2.
(Formula 2)

Here, N _SRS is a case where the terminal transmits PUSCH and SRS in the same subframe for initial transmission, or the PUSCH resource allocation for initial transmission is part of the subframe and frequency bandwidth of cell-specific SRS. Is set to 1 if they overlap, otherwise it is set to 0.

The number of subcarriers in the transmission block for initial transmission (M ^{PUSCH-initial} _SC ), the total number of code blocks derived from the transmission block (C), and the size of each code block (K ^(x) _r , x = {0, 1}) can be obtained from the initial PDCCH for the same transmission block.

If these values are not included in the initial PDCCH (DCI format 0 or 4), the corresponding values may be determined by other methods. For example, M ^{PUSCH-initial} _SC , C and (K ^(x) _r , x = {0, 1}) are the most recent when the initial PUSCH for the same transport block is semi-permanently scheduled. Determined from semi-permanent schedule assignment PDCCH. Alternatively, when PUSCH is initialized by random access response grant (grant), it may be determined from random access response grant for the same transmission block.

As described above, when the number of resource elements for ACK / NACK (or RI) is obtained, the number of bits after channel coding of ACK / NACK (or RI) can be obtained in consideration of the modulation scheme. The total number of ACK / NACK encoded bits is Q _ACK = Q _m · Q ′, and the total number of _RI encoded bits is Q _RI = Q _m · Q ′. Here, Qm is the number of bits per symbol corresponding to the modulation order, and is 2 for QPSK, 4 for 16QAM, and 6 for 64QAM.

  On the other hand, when the SNR or the frequency efficiency is high, the rate matching acts as a puncture to prevent the minimum distance of codewords encoded with the RM code from becoming zero. And a minimum value of resource elements allocated to the RI. At this time, the minimum value of the resource element to be defined may have different values according to the information bit size of ACK / NACK or RI.

3.3 Calculation of the number of coded modulation symbols for CQI and / or PMI-1
When the terminal transmits channel quality control information (CQI or PMI) bits on the PUSCH, the number of resource elements for CQI or PMI per layer can be calculated by Equation 3 below.
(Formula 3)

  In Equation 3, the number of resource elements for CQI or PMI can be expressed as the number of encoded modulation symbols (Q ′). The following description will focus on CQI, but the same applies to PMI.

のようになる。 In Equation 3, O represents the number of CQI bits. L represents the number of CRC bits added to the CQI bit. Here, L has a value of 0 when O is 11 bits or less, and has a value of 8 otherwise. That is,

become that way.

β ^CQI _offset is determined by the number of transmission codewords by the transmission block, and a parameter for determining an offset value for considering an SNR difference between data and UCI is defined as β ^PUSCH _offset = β ^CQI _offset .

M ^PUSCH _SC represents the bandwidth (scheduled) allocated for PUSCH transmission in the current subframe for a transmission block, expressed by the number of subcarriers. N ^PUSCH _symb represents the number of SC-FDMA symbols in the subframe in which the current PUSCH is transmitted, and can be obtained as Equation 2 described above.

N _{^{PUSCH-initial} symb} denotes the initial PUSCH number of SC-FDMA symbols per transmission sub-frame for the same transmission ^{block, M PUSCH-initial} _SC represents the number of subcarriers for the corresponding sub-frame. In K ^(x) _r , x represents the index of the transmission block with the highest MCS specified by the uplink grant.

Here, M ^{PUSCH-initial} _SC , C and K ^(x) _r can be obtained from the initial PDCCH for the same transmission block. If the M ^{PUSCH-initial} _SC , C, and K ^(x) _r values are not included in the initial PDCCH (DCI format 0), the terminal may determine the corresponding value by another method.

For example, when the initial PUSCH for the same transmission block as the initial transmission is semi-permanently scheduled, the M ^{PUSCH-initial} _SC , C and K ^(x) _r values are determined from the most recent semi-permanent schedule allocation PDCCH. Is done. Alternatively, when PUSCH is initialized by random access response permission, M ^{PUSCH-initial} _SC , C and K ^(x) _r values may be determined from random access response permission for the same transmission block.

The data information (G) bit of UL-SCH can be calculated by the following equation 4.
(Formula 4)

As described above, when the number of resource elements for CQI is obtained, the number of bits after channel coding of CQI can be obtained in consideration of the modulation scheme. Q _CQI represents the total number of coded bits of _CQI , and Q _CQI = Q _m · Q ′. Here, _{Q m} is the number of bits per symbol according to the modulation order, in the case of 4,64QAM For 2,16QAM For QPSK becomes 6. In order to preferentially allocate resources for RI, the number of resource elements allocated to RI is excluded. When RI is not transmitted, Q _RI = 0.

3.4 Calculation of the number of coded modulation symbols for HARQ-ACK bits or RI-2
Hereinafter, a method for obtaining the number of resource elements (RE) used for ACK / NACK and RI, which is different from the method described in 3.1 above, will be described.

If the terminal transmits HARQ-ACK bits or RI bits in a single cell, the terminal must determine the number Q ′ of coded modulation symbols per layer for HARQ-ACK or RI. Equation 5 below is used to obtain the number of modulation symbols when only one transmission block is transmitted in the UL cell.
(Formula 5)

  In Equation 5, the number of resource elements for ACK / NACK (or RI) can be expressed as the number of encoded modulation symbols (Q ′). Here, O represents the number of ACK / NACK (or RI) bits.

β ^HARQ-ACK _offset and β ^RI _offset are respectively determined by the number of codewords transmitted by the transmission block. Here, parameters for setting an offset value for considering an SNR difference between data and UCI are defined as β ^PUSCH _offset = β ^HARQ-ACK _offset and β ^PUSCH _offset = β ^RI _offset , respectively.

M ^PUSCH _SC represents the bandwidth (scheduled) allocated for PUSCH transmission in the current subframe for a transmission block, expressed by the number of subcarriers. N _{^{PUSCH-initial} symb} denotes the initial PUSCH number of SC-FDMA symbols per transmission sub-frame for the same transmission ^{block, M PUSCH-initial} _SC is a subcarrier per subframe for initial PUSCH transmission Represents the number. N ^{PUSCH-initial} _sym can be calculated by Equation 2 above.

The number of subcarriers in a transmission block for initial transmission (M ^{PUSCH-initial} _SC ), the total number of code blocks derived from the transmission block (C), and the size of each code block (K ^(x) _r , x = { 0,1}) can be obtained from the initial PDCCH for the same transmission block.

If these values are not included in the initial PDCCH (DCI format 0 or 4), the corresponding values can be determined by other methods. For example, M ^{PUSCH-initial} _SC , C and K ^(x) _r , x = {0, 1} is the most recent semi-persistent schedule assignment when the initial PUSCH for the same transport block is semi-permanently scheduled. Determined from PDCCH. Alternatively, when PUSCH is initialized by random access response permission, it may be determined from random access response permission for the same transmission block.

（式７）

When the terminal tries to transmit two transmission blocks in the UL cell, the terminal has to determine the number Q ′ of modulation symbols encoded per layer for HARQ-ACK or RI. Equations 6 and 7 below are used to obtain the number of modulation symbols when the initial transmission resource values of the two transmission blocks are different in the UL cell.
(Formula 6)

(Formula 7)

であれば，Ｑ’_ｍｉｎ＝０であり，そうでないときは，Ｑ’_ｍｉｎ＝（Ｑ^１ _ｍ，Ｑ^２ _ｍ）である。Ｑ^ｘ _ｍ，ｘ＝｛１，２｝は，伝送ブロック‘ｘ’の変調次数を表し，Ｍ^{ＰＵＳＣＨ‐ｉｎｉｔｉａｌ（ｘ）} _ＳＣ，ｘ＝｛１，２｝は，第１伝送ブロック及び第２伝送ブロックのための初期サブフレームにおいてＰＵＳＣＨ送信のために副搬送波の個数で表現されるスケジュールされた帯域幅を表す。 In Equations 6 and 7, the number of resource elements for ACK / NACK (or RI) can be expressed as the number of coded modulation symbols (Q ′). Here, O represents the number of ACK / NACK (or RI) bits. Where O ≦ 2 and

If so, Q ′ _min = 0, otherwise Q ′ _min = (Q ¹ _m , Q ² _m ). Q ^x _m , x = {1, 2} represents the modulation order of the transmission block 'x', and M ^{PUSCH-initial (x)} _SC , x = {1, 2} represents the first transmission block and the second transmission. Fig. 4 represents the scheduled bandwidth expressed in number of subcarriers for PUSCH transmission in the initial subframe for the block.

式８において，端末が伝送ブロック‘ｘ’に対する初期送信のために同一のサブフレームでＰＵＳＣＨ及びＳＲＳを送信する場合，又は伝送ブロック‘ｘ’の初期送信のためのＰＵＳＣＨリソース割当がセル特定ＲＳＲサブフレーム及び帯域幅構成と部分的に重なる場合に，Ｎ^（ｘ） _ＳＲＳ，ｘ＝｛１，２｝は１であり，そうでないときは，Ｎ^（ｘ） _ＳＲＳ，ｘ＝｛１，２｝は０である。 N ^{PUSCH-initial (x)} _symb , x = {1, 2} represents the number of SC-FDMA symbols per subframe for initial PUSCH transmission for the first transmission block and the second transmission block. N ^{PUSCH-initial (x)} _sym can be calculated from Equation 8 below.
(Formula 8)

In Equation 8, when a terminal transmits PUSCH and SRS in the same subframe for initial transmission for transmission block 'x', or PUSCH resource allocation for initial transmission of transmission block 'x' is cell specific RSR sub N ^(x) _SRS , x = {1,2} is 1 when partially overlapping with the frame and bandwidth configuration, otherwise N ^(x) _SRS , x = {1,2} is 0.

In an embodiment of the present invention, the terminal transmits M ^{PUSCH-initial (x)} _SC , x = {1, 2}, C and K ^(x) _r , x = {1, 2} values of the corresponding transmission block. Can be obtained from the initial PDCCH.

If these values are not included in the initial PDCCH (DCI format 0 or 4), the corresponding values can be determined by other methods. For example, M ^{PUSCH-initial (x)} _SC , x = {1, 2}, C and K ^(x) _r , x = {1, 2} values are used when the initial PUSCH for the same transport block is a semi-persistent schedule Determined from the most recent semi-permanent schedule assignment PDCCH. Or when PUSCH is initialized by random access response permission, M ^{PUSCH-initial (x)} _SC , x = {1, 2}, C and K ^(x) _r , x = {1, 2} values are , It may be determined from the random access response permission for the same transmission block.

In Equations 6 and 7, β ^HARQ-ACK _offset and β ^RI _offset are respectively determined by the number of transmission codewords in the transmission block. Here, parameters for setting an offset value for considering an SNR difference between data and UCI are defined as β ^PUSCH _offset = β ^HARQ-ACK _offset and β ^PUSCH _offset = β ^RI _offset , respectively.

3.5 Calculation of the number of coded modulation symbols for CQI and / or PMI-2
When the terminal transmits channel quality control information (CQI and / or PMI) bits on the PUSCH, the terminal must calculate the number of resource elements for CQI and / or PMI per layer. In the following, the channel quality control information will be described focusing on CQI, but this description can be applied to PMI as well.

  FIG. 19 is a diagram illustrating an example of a method for transmitting uplink control information according to an embodiment of the present invention.

  Referring to FIG. 19, the base station (eNB) can transmit an initial PDCCH signal including DCI format 0 or DCI format 4 to the terminal (S1910).

In step S1910, the initial PDCCH includes information on the number of subcarriers (M ^{PUSCH-initial (x)} _SC ), information on the number of code blocks (C ^(x) ), and information on the size of code blocks (K ^(x) _r. ) May be included.

In step S1910, if (M ^{PUSCH-initial (x)} _SC , C ^(x) and K ^(x) _r values are not included in the initial PDCCH (DCI format 0/4), the terminal may The value of may be determined.

For example, when the initial PUSCH for the same transmission block as at the time of initial transmission is semi-permanently scheduled, the most recent semi-permanent schedule allocation PDCCH is calculated from M ^{PUSCH-initial (x)} _SC , C ^(x) and K ^{( x) The} _r value is determined. Alternatively, when PUSCH is started by permitting random access response, M ^{PUSCH-initial (x)} _SC , C ^(x) and K ^(x) _r values are determined from the random access response permit for the same transmission block. May be.

  Referring to FIG. 19 again, the user equipment (UE) can calculate resource elements for transmitting uplink control information using the information received in operation S1910. In particular, in FIG. 19, the terminal can calculate the number of resource elements (RE) necessary for transmitting channel quality control information (CQI / PMI) in the UCI information (S1920).

  In the embodiment of the present invention, in the case of CQI / PMI, it is spread or multiplexed on a layer belonging to a TB having a high MCS and transmitted. When the MCS levels of two transmission blocks (TB) are the same, CQI shall be transmitted in the first TB.

式９は，式３と類似の方式で計算される。ただし，式３は，ＵＬデータ及び／又はＵＣＩなどを再送信する場合に，再送信パケットが送信されるＴＢの初期ＲＢサイズが異なる場合には用いることができない。すなわち，式９は，多搬送波集約環境で一つ以上のＴＢを用いてＰＵＳＣＨを送信する場合に適用することができる。 However, since the size of the initial resource block (RB) set between the two TBs may be different due to retransmission or the like, the number Q ′ of REs for CQI transmitted via the PUSCH in step S1920 is , And can be calculated as Equation 9 below.
(Formula 9)

Equation 9 is calculated in a manner similar to Equation 3. However, Equation 3 cannot be used when the UL data and / or UCI is retransmitted and the initial RB size of the TB to which the retransmission packet is transmitted is different. That is, Equation 9 can be applied to a case where PUSCH is transmitted using one or more TBs in a multi-carrier aggregation environment.

  In Equation 9, the number of resource elements for CQI or PMI can be expressed by the number of encoded modulation symbols (Q ′). In the following description, CQI will be mainly described, but the same applies to PMI. In Equation 9, “x” represents an index of a transmission block (TB).

となる。 In Equation 9, O represents the number of CQI bits. L represents the number of CRC bits added to the CQI bit. Here, L has a 0 value when O is 11 bits or less, and has an 8 value otherwise. That is,

It becomes.

Here, β ^CQI _offset is determined by the number of transmission codewords by the transmission block, and parameters for determining an offset value for considering an SNR difference between data and UCI are β ^PUSCH _offset = β ^CQI _offset and Determined.

M ^{PUSCH-initial (x)} _SC represents the number of subcarriers for the corresponding subframe, C ^(x) represents the total number of code blocks generated from the transmission block, and K ^(x) _r represents the index. This represents the size of the code block by r. In K ^(x) _r , x represents the index of the transmission block with the highest MCS specified by the uplink grant.

Here, the terminal can obtain the M ^{PUSCH-initial (x)} _SC , C ^(x) and K ^(x) _r values from the initial PDCCH in step S1910.

N ^{PUSCH-initial (x)} _symb represents the number of SC-FDMA symbols per initial PUSCH transmission subframe for the same transmission block. Here, N ^{PUSCH-initial (x)} _symb represents the number of SC-FDMA symbols per subframe for initial PUSCH transmission for the first transmission block and the second transmission block.

式１０において，Ｎ^（ｘ） _ＳＲＳは，端末が伝送ブロック‘ｘ’の初期送信のための同一サブフレーム内でＰＵＳＣＨ及びＳＲＳを送信する場合，又は伝送ブロック‘ｘ’の初期送信のためのＰＵＳＣＨリソース割当がセル特定ＳＲＳのサブフレーム及び周波数帯域幅と部分的に重なる場合には，１に設定され，それ以外の場合は，０に設定される。 Further, the terminal can calculate the N ^{PUSCH-initial (x)} _symb value using the following Equation 10.
(Formula 10)

In Equation 10, N ^(x) _SRS is used when the terminal transmits PUSCH and SRS in the same subframe for initial transmission of transmission block 'x', or PUSCH for initial transmission of transmission block 'x'. If the resource allocation partially overlaps the cell specific SRS subframe and frequency bandwidth, it is set to 1; otherwise, it is set to 0.

In Equation 9, M ^PUSCH _SC represents the bandwidth (scheduled) allocated for PUSCH transmission in the current subframe for a transmission block, expressed as the number of subcarriers. N ^PUSCH _symb represents the number of SC-FDMA symbols in the subframe in which the current PUSCH is transmitted.

  In Equation 9, the variable “x” represents a transmission block (TB) corresponding to the highest MCS level indicated by the initial UL grant. If two transmission blocks have the same MCS level in the corresponding initial UL grant, x can be set to '1' representing the first transmission block.

  Referring to FIG. 19 again, the terminal can generate uplink control information (UCI, CSI, etc.) including CQI using the number of REs calculated in step S1920. At this time, UCI information other than CQI can be calculated using Equations 1, 2, and 5-8 (S1930).

  Further, the terminal can also calculate information (G) of uplink data (UL-SCH signal) transmitted via PUSCH. That is, the terminal can calculate information regarding uplink data to be transmitted together with the uplink control information calculated in step S1930. Thereafter, the terminal can transmit a PUSCH signal including UCI and UL data to the base station (S1940).

In step S1940, the UL-SCH data information (G) bits can be calculated using Equation 11 below.
(Formula 11)

When the terminal determines the number of resource elements for CQI (see Equation 9), the terminal can determine the number of bits after channel coding of CQI in consideration of the modulation scheme for CQI. In Equation 11, N ^(x) _L represents the number of layers corresponding to the xth UL-SCH transport block. Q _CQI represents the total number of CQI encoded bits, and Q _CQI = Q ^(x) _m · Q ′. Here, Q ^(x) _m is the number of bits per symbol corresponding to the modulation order in each transmission block, and is 2 for QPSK, 4 for 16QAM, and 6 for 64QAM. Further, in order to preferentially allocate resources for RI with uplink resources, the number of resource elements allocated to RI is excluded from uplink data information (G) bits. When RI is not transmitted, Q ^(x) _RI = 0.

In FIG. 19, the number of REs allocated to CQI is obtained using parameters by initial transmission of TB (or CW) to which CQI is transmitted, and the maximum value of REs allocated is M which is the entire resource of the current subframe. ^The number of bits Q ^{(x) of} _RI defined in the TB (or CW) to which CQI is transmitted from ^PUSCH _SC · N ^PUSCH _symb is the modulation order Q ^(x) _{m of the} TB (or CW) to which CQI is transmitted. The value is obtained by excluding the value divided by (see Equation 9).

  FIG. 20 is a diagram illustrating another example of a method for transmitting uplink control information according to an embodiment of the present invention.

  Referring to FIG. 20, the base station (eNB) transmits a PDCCH to allocate downlink and uplink resources to the terminal (S2010).

  The terminal (UE) transmits uplink data and / or uplink control information (that is, CQI) to the base station via the PUSCH based on the control information included in the PDCCH (S2020).

  At this time, if an error occurs in the PUSCH signal transmitted in step S2020, the base station transmits a NACK signal to the terminal (S2030).

  A terminal that has received a NACK signal can calculate resources for transmitting uplink data and resources for transmitting uplink control information from radio resources allocated to the terminal when retransmitting uplink data. . Therefore, the terminal can calculate the number of REs for transmitting UCI (S2040).

  In step S2040, the CQI is spread and transmitted to all layers belonging to a transmission block (TB) having a high MCS. In this case, if the MCS levels of the two TBs are the same, the CQI is preferably transmitted in the first TB. However, in step S2040, the PUSCH signal must be retransmitted, and the size of the initial resource block (RB) set in each TB may be different. Therefore, the terminal preferably obtains the number of REs for CQI by the method described in Equation 9.

In addition, when the M ^{PUSCH-initial (x)} _SC , C ^(x) and K ^(x) _r values are included in the PDCCH signal in step S2010, the terminal uses the corresponding information to perform RE for CQI in step S2040. Can be obtained. After receiving the PDCCH including M ^{PUSCH-initial (x)} _SC , C ^(x) and K ^(x) _r values after the step S2030, the terminal uses the corresponding value to determine the number of REs for the CQI. Can be sought.

  Referring to FIG. 20, the UE can generate uplink control information (UCI) using the number of REs for CQI obtained in step S2040. At this time, the terminal can obtain the number of REs for HARQ-ACK and / or RI by the method disclosed in Equation 6 and Equation 7, and can generate UCI using this (S2050).

  Also, the terminal can calculate UL-SCH data information G for uplink data to be retransmitted. The UL-SCH data information G can be calculated using Equation 10. Therefore, when retransmitting the uplink data, the uplink control information (UCI) can be multiplexed (or piggybacked) on the uplink data and transmitted to the base station (S2060).

3.6 Channel Coding Hereinafter, a method for performing channel coding for UCI based on the number of REs for each UCI value calculated using the above-described method will be described.

When the ACK / NACK information bit is 1 bit, the input sequence can be expressed as [o ^ACK ₀ ], and channel coding can be performed according to the modulation order as shown in Table 1 below. is there. Q _m is the number of bits per symbol depending on the modulation order, and has values of 2, 4, and 6 when QPSK, 16QAM, and 64QAM are applied.

When the information bits of ACK / NACK are 2 bits, it can be expressed as [o ^ACK ₀ o ^ACK ₁ ], and channel coding can be performed according to the modulation order as shown in Table 2 below. Here, o ^ACK ₀ is an ACK / NACK bit for codeword 0, o ^ACK ₁ is an ACK / NACK bit for codeword 1, and o ^ACK ₂ = (o ^ACK ₀ + o ^ACK ₁ ) Mod2. In Tables 1 and 2, x and y mean placeholders for scrambling the ACK / NACK information in order to maximize the Euclidean distance of the modulation symbol carrying the ACK / NACK information.

も，複数の符号化されたＡＣＫ／ＮＡＣＫブロックの結合によって生成される。ここで，Ｑ_ＡＣＫは，すべての符号化されたＡＣＫ／ＮＡＣＫブロックに対する符号化されたビットの総個数である。符号化されたＡＣＫ／ＮＡＣＫブロックの最後の結合は，総ビットシーケンスの長さがＱ_ＡＣＫと同一になるように部分的に構成してもよい。 In the case of ACK / NACK multiplexing in frequency division duplex communication (FDD) or time division duplex communication (TDD), if ACK / NACK is 1 bit or 2 bits, the bit sequence q ^ACK ₀ , q ^ACK ₁ , q ^ACK ₂ ,..., Q ^ACK _QACK-1 is generated by combining a plurality of encoded ACK / NACK blocks. Also, in the case of ACK / NACK bundling in TDD, the bit sequence

Is also generated by combining multiple encoded ACK / NACK blocks. Here, Q _ACK is the total number of coded bits for all coded ACK / NACK blocks. The last combination of encoded ACK / NACK blocks may be partially configured so that the total bit sequence length is the same as Q _ACK .

は，下記の表３から選択でき，スクランブルシーケンスを選択するためのインデクスｉは，下記の式１２から計算できる。
（式１２）

Scramble sequence

Can be selected from Table 3 below, and an index i for selecting a scramble sequence can be calculated from Equation 12 below.
(Formula 12)

表３は，ＴＤＤ ＡＣＫ／ＮＡＣＫバンドリングのためのスクランブルシーケンス選択テーブルである。

Table 3 is a scramble sequence selection table for TDD ACK / NACK bundling.

When ACK / NACK is 1 bit, m = 1 is set. When ACK / NACK is 2 bits, m = 3 is set so that the bit sequence q ^ACK ₀ , q ^ACK ₁ , q ^ACK ₂ ,..., Q ^ACK _QACK-1 is generated. At this time, the algorithm for generating the bit sequences q ^ACK ₀ , q ^ACK ₁ , q ^ACK ₂ ,..., Q ^ACK _QACK-1 is as shown in Table 4 below.

式１３において，ｉ＝０，１，２，…，Ｑ_ＡＣＫ−１であり，基本シーケンスＭ_ｉ，ｎは，３ＧＰＰ ＴＳ ３６．２１２規格文書の表５.２.２.６.４−１.を参照されたい。ＨＡＲＱ−ＡＣＫ情報に対するチャネル符号化のベクトルシーケンス出力は，ｑ ^ＡＣＫ _０，ｑ ^ＡＣＫ _１，…，ｑ ^ＡＣＫ _{ＱＡＣＫ−１}と定義できる。このとき，Ｑ’_ＡＣＫ＝Ｑ_ＡＣＫ／Ｑ_ｍとなる。 When the HARQ-ACK information bits are 2 bits or more (that is, [o ^ACK ₀ o ^ACK ₁ ... O ^ACK _oACK-1 ] and o ^ACK > 2), the bit sequences q ^ACK ₀ , q ^ACK ₁ , q ^ACK ₂ ,..., q ^ACK _QACK-1 can be obtained from Equation 13 below.
(Formula 13)

In Equation 13, i = 0, 1, 2,..., Q _ACK −1, and the basic sequence M _{i, n} is Table 5.2.2.6.4.1 of the 3GPP TS 36.212 standard document. Please refer to. The channel coding vector sequence output for HARQ-ACK information can be defined as q ^ACK ₀ , q ^ACK ₁ ,..., Q ^ACK _QACK−1 . At this time, Q ′ _ACK = Q _ACK / Q _m .

Here, the algorithm for generating the bit sequences q ^ACK ₀ , q ^ACK ₁ ,..., Q ^ACK _QACK-1 is as shown in Table 5 below.

When the information bit of RI is 1 bit, the input sequence can be expressed as [o ^RI ₀ ], and channel encoding according to the modulation order can be performed as shown in Table 6 below.

Q _m has a number of bits according to the modulation order, QPSK, 16QAM, 2,4,6 values respectively 64QAM. The map relationship between [o ^RI ₀ ] and RI is as shown in Table 7 below.

When the information bits of RI are 2 bits, the input sequence can be expressed as [o ^RI ₀ o ^RI ₁ ], and channel coding can be performed according to the modulation order as shown in Table 8 below. It is. Here, o ^RI ₀ is the most significant bit (MSB) of 2-bit input, o ^RI ₁ is the least significant bit (LSB) of 2-bit input, and o ^RI ₂ = (o ^RI ₀ + o ^RI ₁ ) Mod2.

Table 9 below shows an example of a map relationship between [o ^RI ₀ o ^RI ₁ ] and RI.

  In Tables 6 and 8, x and y mean placeholders for scrambling the RI information in order to maximize the Euclidean distance of the modulation symbol carrying the RI information.

The bit sequence q ^RI ₀ , q ^RI ₁ , q ^RI ₂ ,..., Q ^RI _QRI-1 is generated by combining a plurality of encoded RI blocks. Here, Q _RI is the total number of coded bits for all coded RI blocks. The final combination of encoded RI blocks may be partially configured so that the total bit sequence length is the same as the _QRI .

Vector output sequence of the channel coding for the ^{_{RI, q RI 0, q RI 1}} , ..., it is defined as _{q RI QRI-1.} Here, Q ′ _RI = Q _RI / Q _m and the vector output sequence can be obtained from the algorithm shown in Table 10 below.

式１４において，ｉ＝０，１，２，…，Ｑ_ＲＩ−１であり，基本シーケンスＭ_ｉ，ｎは，３ＧＰＰ ＴＳ３６．２１２規格文書の表５.２.２.６.４−１.を参照されたい。 On the other hand, if the information bits of RI (or ACK / NACK) are 3 bits or more and 11 bits or less, RM coding is applied to generate a 32-bit output sequence. RM-encoded RI (or ACK / NACK) blocks b ₀ , b ₁ , b ₂ , b ₃ ,..., B _B-1 are calculated as shown in Equation 14 below. Here, i = 0, 1, 2,..., B-1, and B = 32.
(Formula 14)

In Equation 14, i = 0, 1, 2,..., Q _RI −1, and the basic sequence M _{i, n} is obtained from Table 5.2.2.6.4-1 of the 3GPP TS36.212 standard document. Please refer.

4). Implementation Apparatus FIG. 21 shows an apparatus that can implement the method described with reference to FIGS.

  A terminal (UE) can operate as a transmitter in the uplink and a receiver in the downlink. Also, the base station (eNB) can operate as a receiver in the uplink and operate as a transmitter in the downlink.

  That is, the terminal and the base station can include transmission modules 2140 and 2150 and reception modules 2150 and 2170, respectively, to control transmission and reception of information, data, and / or messages, and information, data, and / or messages. May include antennas 2100, 2110, and the like.

  Each of the terminal and the base station may include processors 2120 and 2130 for executing the above-described embodiments of the present invention, and memories 2180 and 2190 for temporarily or permanently storing the processing procedure of the processor. it can.

  The embodiment of the present invention can be implemented using the components and functions of the terminal and base station apparatus described above. Here, the apparatus described with reference to FIG. 21 may further include the configuration shown in FIGS. 2 to 4, and the processor preferably includes the configuration shown in FIGS.

  The processor of the mobile terminal can receive the PDCCH signal by monitoring the search space. In particular, in the case of an LTE-A terminal, PDCCH can be received without blocking PDCCH signals with other LTE terminals by performing blind decoding (BD) on the extended CSS.

  In particular, the terminal processor 2120 can transmit uplink control information to the base station together when transmitting the PUSCH signal. That is, the processor of the terminal can calculate the number of resource elements (RE) for transmitting HARQ-ACK, CQI, RI, and the like using the methods disclosed in Equations 1 to 10. Therefore, the terminal can generate UCI using the calculated number of resource elements, piggyback on uplink data (UL-SCH), and transmit it to the base station.

  The transmission module and the reception module included in the terminal and the base station include a packet modulation / demodulation function for data transmission, a high-speed packet channel coding function, an orthogonal frequency division multiple access (OFDMA) packet schedule, a time division duplex communication (TDD). ) Packet scheduling and / or channel multiplexing functions can be performed. In addition, the terminal and the base station of FIG. 21 may further include a low power radio frequency (RF) / intermediate frequency (IF) module.

  On the other hand, in the present invention, as a terminal, a personal portable terminal (PDA), a cellular phone, a personal communication service (PCS) phone, a GSM phone, a wideband CDMA (WCDMA) phone, an MBS (Mobile Broadband System) phone, a hand-held (Hand-Hold) ) A PC, a notebook PC, a smartphone, or a multi-mode multi-band (MM-MB) terminal can be used.

  Here, a smart phone is a terminal that combines the advantages of a mobile communication terminal and a personal mobile terminal. Refers to terminals that integrate the data communication functions of A multi-mode multi-band terminal is a terminal that incorporates a plurality of modem chips and can operate in both a mobile Internet system and other mobile communication systems (for example, a CDMA2000 system, a WCDMA system, etc.). Point to.

  The embodiments of the present invention described above can be implemented by various means. For example, the embodiments of the present invention can be implemented by hardware, firmware, software, or a combination thereof.

  When implemented in hardware, the method according to embodiments of the present invention includes one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices. (PLD), field programmable gate array (FPGA), processor, controller, microcontroller, microprocessor, etc.

  In the case of implementation by firmware or software, the method according to the embodiment of the present invention may be in the form of a module, procedure, function or the like that performs the function or operation described above. For example, the software code can be stored in the memory units 2180 and 2190 and driven by the processors 2120 and 2130. The memory unit is provided inside or outside the processor, and can exchange data with the processor by various known means.

  The present invention may be embodied in other specific forms without departing from the spirit and essential characteristics of the invention. As such, the above detailed description should not be construed as limiting in any respect, and should be considered as exemplary. The scope of the invention should be determined by reasonable interpretation of the appended claims and any changes that come within the equivalent scope of the invention are included in the scope of the invention. The present invention is not limited to the embodiments disclosed herein, but has the widest scope consistent with the principles and novel features disclosed herein. In addition, claims which do not have an explicit citation relationship in the claims can be combined to constitute an embodiment, or can be included as a new claim by amendment after application.

  The embodiments of the present invention can be applied to various wireless connection systems. Examples of various wireless connection systems include 3GPP, 3GPP2 and / or IEEE 802. xx system. The embodiment of the present invention can be applied to any technical field in which these various wireless connection systems are applied in addition to these various wireless connection systems.

Claims (20)

A method of transmitting channel quality control information using two transmission blocks in a wireless access system that provides a hybrid automatic repeat request (HARQ), comprising:
A terminal receiving a physical downlink control channel (PDCCH) signal including downlink control information (DCI);
Calculating the number (Q ′) of encoded symbols required to transmit the channel quality control information using the DCI;
Transmitting the channel quality control information via a physical uplink shared channel (PUSCH) based on the number of the encoded symbols,
The number of coded symbols (Q ′) is given by the equation

Is calculated using
The DCI includes information on the number of subcarriers (M ^{PUSCH-initial (x)} _SC ) related to the first transmission block for transmitting the channel quality control information and the number of code blocks associated with the first transmission block. Information (C ^(x) ) and information about the size of the code block (K ^(x) _r ),
The method, wherein x is an index for the two transport blocks.   The method of claim 1, wherein the first transmission block is a transmission block having a higher modulation and coding scheme (MCS) level among the two transmission blocks.   The method of claim 1, wherein the first transmission block is the first transmission block when the two transmission blocks have the same modulation and coding scheme (MCS) level. In transmission of the channel quality control information,
The method according to claim 1, wherein the terminal piggybacks the channel quality control information on uplink data to be retransmitted using the HARQ scheme. The terminal further comprising calculating information about the uplink data;
The information about the uplink data is an expression

5. The method of claim 4, wherein the method is calculated using: In a wireless access system providing a hybrid automatic repeat request (HARQ), a method for receiving channel quality control information using two transmission blocks, comprising:
A base station transmitting a physical downlink control channel (PDCCH) signal including downlink control information (DCI) to a terminal;
Receiving the channel quality control information from the terminal via a physical uplink shared channel (PUSCH),
The number (Q ′) of encoded symbols necessary for transmitting the channel quality control information is given by

Is calculated using
The DCI includes information on the number of subcarriers (M ^{PUSCH-initial (x)} _SC ) related to the first transmission block for transmitting the channel quality control information and the number of code blocks associated with the first transmission block. Information (C ^(x) ) and information about the size of the code block (K ^(x) _r ),
The method, wherein x is an index for the two transport blocks.   The method according to claim 6, wherein the first transmission block is a transmission block having a high modulation and coding scheme (MCS) level among the two transmission blocks.   The method of claim 6, wherein the first transmission block is the first transmission block when the modulation and coding scheme (MCS) levels of the two transmission blocks are the same. In receiving the channel quality control information,
The method of claim 6, wherein the channel quality control information is received by piggybacking on uplink data retransmitted using the HARQ scheme. The information about the uplink data is an expression

The method of claim 9, wherein the method is calculated using: In a wireless access system that provides a hybrid automatic repeat request (HARQ), a terminal that transmits channel quality control information using two transmission blocks,
A transmission module for transmitting wireless signals;
A receiving module for receiving radio signals;
A processor for providing transmission of the channel quality control information,
The terminal receives a physical downlink control channel (PDCCH) signal including downlink control information (DCI);
Calculating the number (Q ′) of encoded symbols required to transmit the channel quality control information using the DCI;
Based on the number of coded symbols, the channel quality control information is transmitted through a physical uplink shared channel (PUSCH),
The number of coded symbols (Q ′) is given by the equation

Is calculated using
The DCI includes information on the number of subcarriers (M ^{PUSCH-initial (x)} _SC ) related to the first transmission block for transmitting the channel quality control information and the number of code blocks associated with the first transmission block. Information (C ^(x) ) and information about the size of the code block (K ^(x) _r ),
The terminal x is an index for the two transmission blocks.   The terminal according to claim 11, wherein the first transmission block is a transmission block having a high modulation and coding scheme (MCS) level among the two transmission blocks.   The terminal according to claim 11, wherein the first transmission block is a first transmission block when the modulation and coding scheme (MCS) levels of the two transmission blocks are the same.   The terminal according to claim 11, wherein the channel quality control information is piggybacked on uplink data to be retransmitted using the HARQ scheme and transmitted. Calculating information about the uplink data;
The information about the uplink data is an expression

The terminal according to claim 14, which is calculated using In a wireless access system that provides a hybrid automatic repeat request (HARQ), a base station (eNB) that transmits channel quality control information using two transmission blocks,
A transmission module for transmitting wireless signals;
A receiving module for receiving radio signals;
A processor for providing transmission of the channel quality control information,
The eNB transmits a physical downlink control channel (PDCCH) signal including downlink control information (DCI) to a terminal (UE), and the channel quality control from the UE via a physical uplink shared channel (PUSCH) Receive information,
The number (Q ′) of encoded symbols necessary for transmitting the channel quality control information is given by

Is calculated using
The DCI includes information on the number of subcarriers (M ^{PUSCH-initial (x)} _SC ) related to the first transmission block for transmitting the channel quality control information and the number of code blocks associated with the first transmission block. Information (C ^(x) ) and information about the size of the code block (K ^(x) _r ),
The x is an index for the two transmission blocks.   The base station according to claim 16, wherein the first transmission block is a transmission block having a high modulation and coding scheme (MCS) level among the two transmission blocks.   The base station according to claim 16, wherein the first transmission block is a first transmission block when the modulation and coding scheme (MCS) levels of the two transmission blocks are the same.   The base station according to claim 16, wherein the channel quality control information is piggybacked on uplink data to be retransmitted using the HARQ scheme. Calculating information about the uplink data;
The information about the uplink data is an expression

The base station according to claim 19, which is calculated using

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