KR101295384B1 - Rank Feedback method for MIMO transmission - Google Patents

Abstract

A method of transmitting a plurality of control information through a PUCCH or a PUSCH is provided. A method of reporting a plurality of control information through a PUCCH in a wireless mobile communication system using a plurality of transmit antennas includes a first step of transmitting first control information and a second step of transmitting second control information. . The first step and the second step are performed in units of one subframe, and the first step and the second step are performed once every predetermined period with different periods, and the second step is performed by the first step. In the case of the simultaneous subframes, the first control information is excluded or transmitted simultaneously with the second control information according to the configuration of the closed loop system or open loop system.

RI, CQI / PMI, ACK / NAK, MIMO, rank feedback

Description

Rank feedback method for MIMO

The present invention relates to a broadband wireless mobile communication system using a plurality of antennas, and more particularly, to a method of processing control information on a physical channel.

In next generation mobile communication and wireless transmission systems, in a multi-cell environment, improved data rates and system capacity are required. In response to this demand, research on a multiple input / output (MIMO) system for transmitting data using a plurality of antennas has been conducted. In order to improve data transmission rate in a multi-cell environment, A closed loop multiple input / output system using information improves transmission performance using channel information.

In general, in a multiple input / output (MIMO) system using a frequency division duplex (FDD) scheme, a terminal may know information on a reception channel by using received data, while a base station has a channel unless there is specific channel information feedback. The information is unknown. Since the base station can greatly improve the performance of the system through channel adaptive transmission using downlink channel information, channel information feedback is required so that the base station can know the channel information. When the uplink and downlink use the same frequency band in the time division duplex (TDD) scheme, since the uplink and downlink frequency channel characteristics between the base station and the terminal are the same, when the time-varying characteristics of the channel are small, the base station receives channel information of the terminal. Can be predicted.

In a closed loop system using the MIMO scheme, general channel feedback information includes channel quality indicator (CQI), precoding matrix index (PMI), and rank information.

The time and frequency resources that can be used by the UE to report the above CQI, PMI, and RI may be controlled by the eNB. In addition, the above control information may be reported periodically or aperiodically. For spatial multiplexing, the UE may determine the RI corresponding to the number of available transport layers.

CQI, PMI, and RI reporting may be periodic or aperiodic. The UE may transmit CQI, PMI, and RI reports on the PUCCH for subframes to which no PUSCH is assigned. The UE may transmit CQI, PMI, and RI reports on the PUSCH for the subframe to which the PUSCH is allocated.

Meanwhile, data and control sequences transmitted from the media access control layer to the physical layer are encoded and then transmitted and controlled through a radio transmission link. service). The channel coding scheme may include error detection, error correction, rate matching, interleaving, and transport channel information or control information in physical channels. This is done by combining the processes that map to. Examples of the control information include the above-described CQI, PMI, and RI.

The multiplexed sequence can be generated by multiplexing control information and data information from the transport channel. In this case, the control information may be classified into one or more types according to its characteristics, and various multiplexing schemes may be considered according to the number of classified types. When there is only one type of control information, the control information may not overwrite or overwrite the data information when the data information and the control information are multiplexed. When two types of control information exist, the control information may be divided into a first type of control information and a second type of control information. When the second type of control information is more important than the first type of control information, the control information of the first type is multiplexed in such a manner that the data information is overwritten or not overwritten when the data information and control information are multiplexed And thereafter, the second type of control information may not overwrite or overwrite the multiplexed data information and / or the first type of control information.

The present invention proposes a method for efficiently scheduling and transmitting control information including one or more of PMI / CQI, RI, and ACK / NAK through PUSCH or PUCCH.

In order to solve the above problems of the present invention, a method of reporting a plurality of control information via a physical uplink control channel (PUCCH) in a wireless mobile communication system using a plurality of transmit antennas according to an aspect of the present invention, A first step of transmitting the first control information, and a second step of transmitting the second control information, wherein the first step and the second step are performed in units of one subframe, and the first The step is performed once every predetermined period. In this case, the second step may be performed in subframes other than the subframe in which the first step is performed. In this case, the first control information may be rank information (RI), and the second control information may be information about a wideband CQI and a wideband PMI. At this time, when the above-mentioned wireless mobile communication system uses two transmit antennas, if the rank is 1, four bits are allocated for the transmission of the above-mentioned wideband CQI. If the rank is 2, the above-mentioned wideband CQI is transmitted. For the transmission of the above-mentioned wideband CQI, four bits are allocated for the transmission of the above-mentioned wideband CQI when the above-mentioned wireless mobile communication system uses four transmit antennas. In this case, seven bits may be allocated for the transmission of the wideband CQI. Alternatively, when the above wireless mobile communication system uses two transmit antennas, if the rank is 1, two or three bits are allocated for the transmission of the above broadband PMI, and if the rank is 2, the above broadband One or two bits are allocated for the transmission of the PMI. When the above-mentioned wireless mobile communication system uses four transmitting antennas, if the rank is 1, four bits are allocated for the transmission of the wideband PMI. If the rank is greater than 1, four bits may be allocated for transmission of the above-described wideband PMI. Or, when the above wireless mobile communication system uses two transmit antennas, one bit is allocated for the above RI transmission, and when the above wireless mobile communication system uses four transmit antennas, Two bits may be allocated for transmission. In this case, the above wireless mobile communication system may use a transmission mode of closed loop spatial multiplexing.

Alternatively, the first control information may be RI, and the second control information may be information regarding a wideband CQI. In this case, four bits are allocated for the transmission of the wideband CQI, and one bit is allocated for the transmission of the RI when the wireless mobile communication system uses two transmission antennas. When the system uses four transmit antennas, two bits may be allocated for the transmission of the above RI. In this case, the wireless mobile communication system may use a transmission mode of the open-loop spatial multiplexing scheme.

In a wireless mobile communication system using a plurality of transmit antennas according to another aspect of the present invention and using a transmission mode of an open-loop spatial multiplexing scheme, a method of reporting a plurality of control information through a PUCCH transmits information on a wideband CQI. And a second step of transmitting an RI, wherein the first step and the second step are performed simultaneously in the same subframe, and four bits are allocated for transmission of the wideband CQI. One bit is allocated for the transmission of the RI when the above wireless mobile communication system uses two transmit antennas, and the transmission of the above RI is performed when the above wireless mobile communication system uses four transmitting antennas. Two bits are allocated.

According to the present invention, control information including at least one of PMI / CQI, RI, and ACK / NAK is efficiently scheduled and transmitted through PUSCH or PUCCH.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. The detailed description set forth below in conjunction with the appended drawings is intended to illustrate exemplary embodiments of the invention and is not intended to represent the only embodiments in which the invention may be practiced. The following detailed description includes specific details for a better understanding of the present invention. However, those skilled in the art will appreciate that the present invention may be practiced without these specific details. For example, in the following description, certain terms are mainly described, but they need not be limited to these terms, and they may have the same meaning when they are referred to as arbitrary terms. Further, the same or similar elements throughout the present specification will be described using the same reference numerals.

The content of 3GPP TS 36.211 is incorporated into this document by reference.

CQI / PMI / RI may be transmitted on PUCCH or PUSCH by the method described below.

Table 1 shows CQI transmission schemes for various scheduling modes. CQI may be transmitted on PUCCH and PUSCH. In this case, when both the periodic and aperiodic reports occur in the same subframe, the UE may transmit only the aperiodic report in the subframe.

When reporting the RI, the UE can report a single instance indicating the number of useful transmission layers. During closed loop spatial multiplexing, the UE, for each RI reporting interval, may determine the RI from the set of supported RI values for the eNodeB and UE antenna configuration, and report that number through each RI report. During open loop spatial multiplexing, the UE determines, for each RI reporting interval, an RI for the eNodeB and UE antenna configuration within each reporting interval, and reports the number detected through each RI reporting, where RI = 1. It can support the choice between transmit diversity and RI> 1 large-delay CDD open-loop spatial multiplexing.

When reporting a PMI, the UE may report a single PMI or multiple PMI reports. The UE may be restricted to report PMI and RI only within the precoder codebook subset specified by the bitmap configured by higher layer signaling. For a particular precoder codebook and associated transmission mode, the bitmap may specify all possible precoder codebook subsets.

에 따라 k개 보다 작은 개수의 PRB를 가질 수 있다.

에 의해 주어지는 시스템 대역폭에 대한 부대역의 개수는

으로 정의된다. 여기서, '광대역 CQI(wideband CQI)'라는 용어는 S 전체에 걸쳐 획득되는 CQI 값을 지칭한다.The set of subbands that the UE evaluates for CQI reporting can be defined within the overall downlink system bandwidth. A set of physical resource blocks (PRBs) constituting one subband may consist of k consecutive PRBs. Here, k may be configured semi-statically by a higher layer. The last subband of S

In some cases, the number of PRBs may be smaller than k.

The number of subbands for system bandwidth given by

. Here, the term 'wideband CQI' refers to a CQI value obtained throughout S.

For single antenna ports and transmit diversity as well as for open loop spatial multiplexing, and for closed loop spatial multiplexing with RI = 1, a single 4-bit wideband CQI (CQI) is reported according to Table 2. Can be.

When RI> 1, the report generated based on closed loop spatial multiplexing PUSCH reports wideband CQI including 4-bit wideband CQI for codeword 1 and 4-bit wideband CQI for codeword 2 according to Table 2 It may include the step.

When RI> 1, closed-loop spatial multiplexing PUCCH based reporting separately reports 4-bit wideband CQI for codeword 1 according to Table 2 and wideband spatial differential CQI having separate reporting periods and relative subframe offsets, respectively. It may include a step. The wideband space differential CQI may include a 3-bit wideband space differential CQI for codeword 2. Here, the 3-bit wideband spatial difference CQI for codeword 2 may be a value obtained by subtracting the wideband CQI index for codeword 2 from the wideband CQI index for codeword 1. The set of exact offset levels is {-4, -3, -2, -1, 0, +1, +2, +3}.

Aperiodic CQI / PMI / RI Reporting Using PUSCH

When the UE receives the indication transmitted by the scheduling grant, the UE may perform aperiodic CQI / PMI / RI using the PUSCH. The size and message format of the aperiodic CQI report may be given by radio resource control (RRC).

The minimum reporting interval for aperiodic reporting of CQI / PMI / RI may be one subframe. The subband size for CQI is the same for the transmitter and the receiver whether or not there is precoding.

The UE may be semi-statically configured by a higher layer to feed back the CQI / PMI and the corresponding RI on the same PUSCH using one of the reporting modes given in Table 3.

UE transmits a single-antenna port (port 0), transmit diversity, open loop spatial multiplexing, closed loop spatial multiplexing, multi-user MIMO, closed loop rank = 1 precoding, and single-antenna port (port 5) Can be used. In this case, modes 2-0 and 3-0 may be supported for a single antenna port transmission mode, modes 2-0 and 3-0 may be supported for a transmission diversity transmission mode, and an open loop spatial multiplexing transmission mode. Modes 2-0 and 3-0 may be supported for the S2, and modes 1-2, 2-2 and 3-1 may be supported for the closed loop spatial multiplexed transmission mode.

Both the selection of the PMI and the calculation of the CQI are dependent on the RI value selected by the UE for the corresponding reporting instance. The RI report on the PUSCH report mode is valid only for the CQI / PMI report on the PUSCH report mode.

Periodic CQI / PMI / RI Reporting Using PUCCH

The UE may be semi-fixedly configured by a higher layer to periodically feed back different CQIs, PMIs, and RIs using the reporting mode given in Table 4 on the PUCCH.

For the subband CQI selected by the UE, the CQI reporting in a certain subframe may depict the channel quality in 'specific portion of bandwidth' or 'specific portions of bandwidth'. Hereinafter, 'specific portion of the bandwidth' or 'specific portions of the bandwidth' may be described in terms of 'bandwidth portion (BP)' or 'bandwidth portions'. Subbands may be assigned index numbers, starting at the lowest frequency, in increasing frequency, and not increasing in magnitude.

의 시스템 대역폭에 대하여 총 N개의 부대역이 존재한다. 여기서,

개의 부대역들은 k의 크기를 가질 수 있다. 만일

이라면, 부대역 중 하나는

의 크기를 가질 수 있다.

There are a total of N subbands for the system bandwidth of. here,

Subbands may have a size k. if

If one of the substation

It may have a size of.

또는 S에 스팬(span)된다. 만일 J=1이면,

이고, 만일, J>1이면 N_J는

또는

-1일 수 있다.The bandwidth portion is frequency-continuous and may consist of N _J subbands. Where the J bandwidth parts are given in Table 7.2.2-2

Or spans S. If J = 1,

, If J > 1, then N _J is

or

May be -1.

The CQI and PMI payload sizes of each PUCCH reporting mode may be given as shown in Table 5.

Four CQI / PMI and RI report types with different periods and offsets may be supported for each PUCCH report mode given in Table 6. The Type 1 report in Table 6 supports CQI feedback for subbands selected by the UE, the Type 2 report supports CQI and PMI feedback, the Type 3 report supports RI feedback, and the Type 4 report supports wideband CQI. Can support

In the above-described scheme, the possibility that the RI and the CQI / PMI are encoded together on the PUCCH in the same subframe is not considered. However, several alternatives can be considered.

1) A method of periodically reporting RI and CQI / PMI on PUCCH. In this case, only different reporting periods may be supported for RI and CQI / PMI, or both different reporting periods and the same reporting period may be supported.

2) A method of periodically reporting CQI / PMI on the PUSCH and periodically reporting RI on the PUCCH. In this case, RI and CQI / PMI have different reporting periods.

3) Method in which RI and CQI / PMI are periodically reported together on the PUSCH.

4) Method in which RI and CQI / PMI are reported aperiodically on the PUSCH. Here, RI is encoded separately from CQI / PMI, and RI represents how to decode CQI / PMI.

5) RI on PUCCH and PUSCH is reported periodically and used for CQI / PMI reporting.

Example 1

In one embodiment of the present invention, the RI report and the CQI / PMI report have the following relationship.

1) RI and CQI / PMI may be reported aperiodically on the PUSCH.

2) RI and CQI / PMI may always be reported in the same subframe.

3) CQI / PMI can be calculated assuming RI reported simultaneously.

Example 2

In another embodiment of the present invention, the RI report and the CQI / PMI report have the following relationship.

1) RI and CQI / PMI may be reported periodically on the PUSCH.

2) RI and CQI / PMI may always be reported in the same subframe, and thus may be reported in the same period.

3) CQI / PMI can be calculated assuming RI reported simultaneously.

Example 3

In another embodiment of the present invention, the RI report and the CQI / PMI report have the following relationship.

1) For each UE, Node-B may configure a single CQI reporting resource for both RI and wideband CQI / PMI.

2) A reporting instance is defined as a subframe in which reporting is performed.

3) RI and wideband CQI / PMI are not transmitted to the same reporting instance.

4) According to the configuration of the higher layer, for every Mth CQI reporting instance, RI is reported instead of wideband CQI / PMI.

5) Wideband CQI / PMI is reported in the remaining CQI reporting instance.

6) The most recently transmitted RI is used by the UE to calculate the wideband CQI / PMI transmitted on the configured resource.

7) When CQI / PMI reporting or RI reporting is not multiplexed with ACK / NAK Format 2 as defined in section 5.4.2 of 3GPP TS 36.211 is used and when CQI / PMI reporting or RI reporting is multiplexed with ACK / NAK. Format 2a / 2b as defined in section 5.4.2 of 3GPP TS 36.211 is used.

FIG. 1 exemplarily illustrates a reporting instance when M = 4 in the 4) th relationship.

Payload sizes for some scenarios can be defined as shown in Tables 7 and 8.

Table 7 shows the payload size, in bits, for CQI and PMI in closed loop spatial multiplexing. At this time, the CQI / PMI is transmitted through the PUCCH.

Table 8 shows the payload size for the RI in number of bits in the closed loop spatial multiplexing scheme. At this time, the RI is transmitted through the PUCCH.

Example 4

In another embodiment of the present invention, frequency selective CQI / PMI (frequecncy-selective) and RI reporting may be reported in a manner similar to that described above on PUCCH. In this case, the relationship between wideband CQI / PMI, frequency selective CQI / PMI reporting, and RI needs to be determined in more detail according to a reporting method for frequency selective CQI / PMI reporting for SU-MIMO.

Example 5

The schemes according to the embodiments described above can also be applied to open-loop spatial multiplexing, assuming the following exceptions. That is, no PMI is reported, and the payload sizes for different scenarios for PUCCH can be given by Tables 102 and 103.

Table 9 shows the payload size for CQI in number of bits in an open loop spatial multiplexing scheme. At this time, the CQI is transmitted through the PUCCH.

Table 10 shows the payload size, in bits, for an RI in an open-loop spatial multiplexing scheme. At this time, the RI is transmitted through the PUCCH.

FIG. 2 applies the reporting method of FIG. 1 to the open-loop spatial multiplexing method. In open-loop spatial multiplexing, since the PMI is not transmitted on the uplink channel, it can be confirmed that the PMI is not transmitted.

Alternatively, the schemes according to the embodiments described above can also be applied to open-loop spatial multiplexing, assuming the following exceptions. That is, the PMI is not reported, the CQI and the RI are reported at the same time, and the payload sizes for different scenarios for the PUCCH may be given by Table 11.

Table 11 shows the payload size, in bits, for CQI and PMI in open loop spatial multiplexing. At this time, the CQI and the PMI are transmitted through the PUCCH.

According to the above-described scheme for the open-loop spatial multiplexing transmission mode, the timing relationship is simplified because the CQI and RI are transmitted together in the PUCCH on the same subframe.

For each of the above-described first embodiment, second embodiment, and fourth embodiment, RI may be transmitted in the following manner.

When the RI is transmitted together with the CQI / PMI, the RI may be encoded separately from the CQI / PMI. Encoded bits or code strings in which CQI and PMI are encoded together may be referred to as "CQI / PMI codes" for convenience. This CQI / PMI code bit is modulated to generate a 'CQI / PMI symbol'. Similarly, an encoded bit or RI coded code may be referred to as a 'RI code' for convenience. This RI code bit is modulated to generate a 'RI symbol'.

When the RI code is transmitted with the CQI / PMI code, the RI code is multiplexed and transmitted by puncturing the CQI / PMI code string.

In this case, when the CQI / PMI code string is punctured, the Hamming distance, minimum distance, or Euclidean distance of the CQI / PMI code string may be used to alleviate the degradation of the CQI / PMI reception performance. It is possible to preset a puncturing pattern that maintains optimally. Thereafter, according to this pattern rule, the CQI / PMI code string can be punctured by the required number of RI codes.

Using the (32,10) lead muller code as an example, a modified lead muller code set consisting of code string length M and information length N (the variability of N is specified in a table or a formula) is used for the encoding of CQI and PMI. In this case, the RI code string may be multiplexed by puncturing the CQI / PMI code string through puncturing, repetition, and permutation between the code length and the code index or code element index on the code set. Such multiplexing may be performed using a puncturing scheme that reduces the length of the code string from 32 to M (how to maximize the distance or minimum distance of the code string), another permutation scheme, or other schemes.

In addition, when the CQI / PMI is tail biting convolutional (TBC) coding, the code string of the CQI / PMI is punctured at the rate matching as necessary for the transmission of the RI code string.

Meanwhile, in order to reduce communication errors, separate encoding may be performed on the RI. If the UE is not concerned about the degradation of the reception performance according to the speed of the UE, when the RI is multiplexed with the CQI / PMI and / or ACK / NAK and transmitted through the PUSCH, the multiplexed symbol sequence is time-first. ) May be mapped to a time / frequency (SC-FDMA symbol or OFDM symbol / subcarrier or subcarrier group) resource of the PUSCH (Method 1). However, if more accurate channel estimation is required according to the speed of the UE, RI and / or CQI / PMI symbols may be mapped adjacent to symbols located before or after a reference signal (pilot) (Method 2). ).

In the above method 1 and method 2, the method of mapping sequentially from the beginning of the PUSCH resource region (option 1) or the method of mapping backward from the end of the resource region (option 2) is combined by the time-first method, respectively. Can be.

In this case, the RI symbol string may be preferentially mapped to the CQI / PMI symbol string. In this manner, RI can be easily decoded without errors.

On the contrary, the CQI / PMI symbol string may be preferentially mapped to the RI symbol string.

When the RI and ACK / NACK symbols are mapped to symbols adjacent to the left and right sides of the RS using the scheme 2, the mapping order is as follows. That is, if CQI / PMI is mapped by the order of option 1 above, RI and ACK / NACK symbols may be mapped by the order of option 2. Alternatively, if CQI / PMI is mapped by the order of option 2 above, RI and ACK / NACK symbols may be mapped by the order of option 1. That is, if CQI / PMI is mapped in the manner of option 1, ACK / NACK and RI are mapped sequentially from the last frequency carrier index on the available resource block (option 1-A), and CQI / PMI is in the manner of option 2 When mapping, ACK / NACK and RI may be sequentially mapped from the first frequency carrier index on the available resource block (Option 2-A).

In Option 1-A and Option 2-A above, where RI is important, RI may be preferentially mapped to ACK / NACK, and ACK / NAK may be mapped to resource elements to which RI is not mapped. On the contrary, when ACK / NAK is important, ACK / NACK may be preferentially mapped to RI, and RI may be mapped to resource elements to which ACK / NACK is not mapped.

Alternatively, the ACK / NACK and the RI may be alternately mapped to each other. In this case, they may be crossed in one modulation symbol unit or may be crossed in a group unit composed of a plurality of modulation symbols.

The embodiments described above are the components and features of the present invention are combined in a predetermined form. Each component or feature shall be considered optional unless otherwise expressly stated. Each component or feature may be implemented in a form that is not combined with other components or features. It is also possible to construct embodiments of the present invention by combining some of the elements and / or features. The order of the operations described in the embodiments of the present invention may be changed. Some configurations or features of certain embodiments may be included in other embodiments, or may be replaced with corresponding configurations or features of other embodiments. It is clear that the claims that are not expressly cited in the claims may be combined to form an embodiment or be included in a new claim by an amendment after the application.

Embodiments in accordance with the present invention may be implemented by various means, for example, hardware, firmware, software, or a combination thereof. In the case of hardware implementation, an embodiment of the present invention may include one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs) field programmable gate arrays, processors, controllers, microcontrollers, microprocessors, and the like.

In the case of implementation by firmware or software, an embodiment of the present invention may be implemented in the form of a module, procedure, function, etc. that performs the functions or operations described above. The software code can be stored in a memory unit and driven by the processor. The memory unit may be located inside or outside the processor, and may exchange data with the processor by various well-known means.

It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. Accordingly, the above description should not be construed in a limiting sense in all respects and should be considered illustrative. The scope of the invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the invention are included in the scope of the invention.

The present invention can be used in communication equipment or mobile terminals used in broadband wireless mobile communication systems.

1 is a view showing a transmission method of control information according to an embodiment of the present invention.

2 is a diagram illustrating a method of transmitting control information according to another embodiment of the present invention.

Claims (11)

A method of reporting a plurality of control information in a wireless mobile communication system using a plurality of transmit antennas, Transmitting first control information; And Transmitting the second control information Including, The transmission of the first control information and the transmission of the second control information are performed once per predetermined period, in units of one subframe, and the first control information and the second control information are physical uplink control channels ( physical uplink control channel (PUCCH), When the wireless mobile communication system operates in a closed loop spatial multiplexing mode, the first control information is rank information (RI) and the second control information is a broadband channel quality indicator (CQI) and a wideband. Information about a precoding matrix index (PMI), When the wireless mobile communication system uses two transmit antennas, four bits are allocated for the transmission of the wideband CQI when the rank is 1, and seven bits are transmitted for the transmission of the wideband CQI when the rank is greater than 1. Bits are allocated, When the wireless mobile communication system uses four transmit antennas, four bits are allocated for transmission of the wideband CQI when the rank is 1, and seven bits are transmitted for transmission of the wideband CQI when the rank is greater than 1. Bit is allocated, How to report control information. The method of claim 1, When the wireless mobile communication system uses two transmit antennas, when the rank is 1, two or three bits are allocated for the transmission of the wideband PMI, and when the rank is 2, the transmission of the wideband PMI is performed. One or two bits are allocated, When the wireless mobile communication system uses four transmit antennas, four bits are allocated for transmission of the wideband PMI, How to report control information. The method of claim 1, When the wireless mobile communication system uses two transmit antennas, one bit is allocated for transmission of the RI, When the wireless mobile communication system uses four transmit antennas, two bits are allocated for transmission of the RI. How to report control information. The method of claim 1, When the wireless mobile communication system operates in an open loop spatial multiplexing mode, the first control information is RI and the second control information is information about a wireless CQI; How to report control information. 5. The method of claim 4, Four bits are allocated for transmission of the wideband CQI, One bit is allocated for the transmission of the RI when the wireless mobile communication system uses two transmission antennas, and two bits are allocated for the transmission of the RI when the wireless mobile communication system uses four transmission antennas. felled, How to report control information. A method of reporting a plurality of control information through a physical uplink control channel (PUCCH) in a wireless mobile communication system using a plurality of transmit antennas and using a transmission mode of an open loop spatial multiplexing scheme, Transmitting information about a broadband channel quality indicator (CQI); And Transmitting rank information (RI) / RTI > The transmission of the wideband CQI and the RI are simultaneously performed in the same subframe. Four bits are allocated for transmission of the wideband CQI, One bit is allocated for the transmission of the RI when the wireless mobile communication system uses two transmission antennas, and two bits are allocated for the transmission of the RI when the wireless mobile communication system uses four transmission antennas. felled, How to report control information. delete delete delete delete delete

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