KR20120092897A - Method and apparatus for transmitting and receiving channel state information in wireless communication systems - Google Patents

Abstract

PURPOSE: A channel state information transmission and reception method in a wireless communication system and apparatus thereof are provided to prevent the waste of uplink resource by effectively monitoring downlink states. CONSTITUTION: A base station sets the first field of payload as report request indication information(S920). The base station sets the second filed of the payload as mode indication information(S952,S954). The base station transmits a payload encoding signal to a user terminal(S960). The base station receives a signal including channel state information from the user terminal(S970). The base station extracts the channel state information by decoding the signal according to a report method indicated by the mode indication information(S980).

Description

Method and apparatus for transmitting and receiving channel state information in a wireless communication system {Method and Apparatus for Transmitting and Receiving Channel State Information in Wireless Communication Systems}

The present invention relates to a method and apparatus for measuring and transmitting a channel state of a component carrier in a wireless communication system using one or more component carriers (CC).

As communication systems have evolved, consumers, such as businesses and individuals, have used a wide variety of wireless terminals.

The current mobile communication system is a high-speed large-capacity communication system capable of transmitting and receiving a variety of data such as video, wireless data, etc., away from voice-oriented services, and there is a demand for developing a technology capable of transmitting large-capacity data corresponding to a wired communication network. To this end, a plurality of antennas are used or various carriers are considered.

On the other hand, the base station and the user terminal monitors the state of the downlink in communication, which allows to adaptively transmit and receive data in the downlink situation that changes every time. In the above method of using various carriers, the number of carriers to be monitored also increases and decreases according to the number of carriers, so it is necessary to monitor the downlink state more effectively. To this end, it is necessary to put less processing resources in checking the downlink state. In particular, when using a plurality of CCs, it is necessary to set up a reporting method more efficiently to avoid waste of uplink resources.

The present invention relates to a wireless communication system, and to provide a method and apparatus for transmitting and receiving wireless communication channel state information. In particular, it is intended to be able to more efficiently set a reporting method in a multi-carrier environment that can report a variety of channel state information.

In a method for receiving channel state information in a wireless communication system according to an embodiment of the present invention for realizing the above object, report request indication information instructing aperiodic channel state information reporting of a user terminal in a first field of a payload. Setting mode indication information implicitly indicating a reporting method of the channel state information in a second field; transmitting a signal encoding the payload including the first and second fields to the user terminal; Receiving a signal including channel state information from the user terminal, and extracting the channel state information by decoding the received signal according to a reporting method indicated by the mode indication information, and including mode indication information. Indicates a single mode or a multiple mode, and the report request indication information and half of the user terminal Characteristic distinguishable by the mode delimiter calculated in at least one of a carrier aggregation configuration, a transmission scheme and an adaptive modulation scheme.

In a method of transmitting channel state information in a wireless communication system according to another embodiment of the present invention, the method comprising: receiving a signal obtained by encoding a payload from a base station, wherein the first field of the payload indicates aperiodic channel state information report; Measuring channel state information for one or more component carriers indicated by the report request indication information, wherein the measured information is solely determined according to the mode indication information included in the second field of the payload; Generating a signal by encoding in a mode or a multi-mode, and transmitting the generated signal to the base station, wherein the mode indication information includes the report request indication information and the carrier aggregation configuration and transmission scheme of the user terminal. Distinguishable by mode delimiter calculated from at least one of And that is characterized.

In a wireless communication system according to another embodiment of the present invention, the apparatus for receiving channel state information sets the first field of the payload as report request indication information for instructing aperiodic channel state information reporting of the user terminal, and the second field. A control unit for setting the report mode of the channel state information to the mode indication information implicitly, a signal encoding the payload including the first and second fields to the user terminal and transmitting the channel state from the user terminal. A transceiver for receiving a signal including information, and a channel state information extracting unit for decoding the received signal according to a reporting method indicated by the mode indication information and extracting the channel state information, wherein the mode indication information is independent. A mode or a multi-mode indicating half of the report request indication information and the user terminal Wave to the aggregation structure, transmission scheme, and the adaptive modulation scheme at least one or more characterized in that the mode distinction by the separator of the output from.

In a wireless communication system according to another embodiment of the present invention, an apparatus for transmitting channel state information includes a transceiver for transmitting and receiving a signal encoded with a payload, and a signal received from the transceiver, thereby encoding the payload. If the field 1 is set to report request indication information indicating aperiodic channel state information reporting, a control unit for measuring channel state information for one or more CCs indicated by the report request indication information, and the measured information of the payload. A channel state information generator for generating a signal by encoding a single mode or a multi-mode according to the mode indication information included in the second field, wherein the mode indication information includes the report request indication information and the carrier aggregation configuration of the user terminal; By the mode identifier calculated in at least one of the transmission method and the adaptive modulation method It is characterized by distinguishable.

1 illustrates a wireless communication system to which embodiments of the present specification are applied.
2 is a diagram illustrating carrier aggregation and intercarrier scheduling to which the present invention is applied.
3 is a view showing a linkage relationship between up and down carriers in a carrier aggregation boundary according to an embodiment of the present invention.
4 is a diagram illustrating an ambiguity situation that can be applied to an embodiment of the present invention.
FIG. 5 is a diagram illustrating a case in which a value of N to which an embodiment of the present invention is applied is based on a configured CC.
FIG. 6 is a diagram illustrating a case in which a value of N to which another embodiment of the present invention is applied is based on a configured CC.
FIG. 7 illustrates a case in which a value of N to which another embodiment of the present invention is applied is based on an activated CC.
FIG. 8 illustrates a case in which a value of N to which another embodiment of the present invention is applied is based on an activated CC.
FIG. 9 is a diagram illustrating a process of determining a reporting mode in order to request aperiodic channel state information from a base station according to an embodiment of the present invention and requesting reporting of the aperiodic channel state information to the user terminal accordingly. to be.
10 is a user terminal according to an embodiment of the present invention receives a request for reporting of the aperiodic channel state information from the base station, confirms the reporting method in the payload including the report request and accordingly aperiodic channel state information to the base station Is a diagram illustrating a process of transmitting a message.
11 is a diagram illustrating a configuration of a base station according to an embodiment of the present invention.
12 is a diagram illustrating a configuration of a user terminal according to an embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are assigned to the same components as much as possible even though they are shown in different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

1 illustrates a wireless communication system to which embodiments of the present specification are applied.

Wireless communication systems are widely deployed to provide various communication services such as voice and packet data.

Referring to FIG. 1, a wireless communication system includes a user equipment (UE) 10 and a base station 20 (base station, BS, or eNB). Terminal 10 in the present specification is a generic concept that means a user terminal in wireless communication, WCDMA, UE (User Equipment) in LTE, HSPA, etc., as well as MS (Mobile Station), UT (User Terminal) in GSM ), SS (Subscriber Station), wireless device (wireless device), etc. should be interpreted as including the concept.

The base station 20 generally refers to a node communicating with the terminal 10, and includes a node-B, an evolved node-B, an base transceiver system (BTS), and an access point. ) May be called in other terms, such as a relay node.

That is, in the present specification, the base station 20 or the cell should be interpreted in a comprehensive sense indicating some areas covered by the base station controller (BSC) in the CDMA, the NodeB of the WCDMA, and the like. It is meant to cover various coverage areas such as microcell, picocell, femtocell and relay node communication range.

In the present specification, the terminal 10 and the base station 20 are two transmitting and receiving entities used to implement the technology or technical idea described in the present specification and are used in a comprehensive sense and are not limited by the terms or words specifically referred to. . The terminal 10 and the base station 20 are two (uplink or downlink) transmission and reception subjects used to implement the technology or the technical idea described in the present invention, which are used in a generic sense and are specifically referred to in terms or words. It is not limited by. Here, the uplink (Uplink or uplink) means a method for transmitting and receiving data to the base station 20 by the terminal 10, the downlink (downlink, or downlink) is a terminal (by the base station 20) 10) means a method of transmitting and receiving data.

There is no limitation on the multiple access scheme applied to the wireless communication system. Various multiple access techniques such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), OFDM-FDMA, OFDM-TDMA, OFDM-CDMA Can be used.

Uplink transmission and downlink transmission may use a time division duplex (TDD) scheme that is transmitted using different times, or a frequency division duplex (FDD) scheme that is transmitted using different frequencies. This can be used.

The present invention should not be construed as being limited or limited to a specific wireless communication field, but should be construed as including all technical fields to which the spirit of the present invention can be applied.

Meanwhile, the uplink (UL) and the downlink (DL) may be configured based on one carrier or a pair of carriers. Uplink and downlink transmit control information through control channels such as Physical Downlink Control CHannel (PDCCH), Physical Control Format Indicator CHannel (PCFICH), Physical Hybrid ARQ Indicator CHannel (PHICH), and Physical Uplink Control CHannel (PUCCH). A data channel is configured such as PDSCH (Physical Downlink Shared CHannel), PUSCH (Physical Uplink Shared CHannel) and the like to transmit data.

In a wireless communication system to which an embodiment of the present invention is applied, multiple access schemes for downlink and uplink transmission may be different. For example, downlink uses Orthogonal Frequency Division Multiple Access (OFDMA), and uplink It is as if one could use SC-FDMA (Single Carrier-Frequency Division Multiple Access).

The layers of the radio interface protocol between the terminal and the network are based on the lower three layers of the Open System Interconnection (OSI) model, which are well known in communication systems. The physical layer may be divided into a second layer (L2) and a third layer (L3), and the physical layer belonging to the first layer provides an information transfer service using a physical channel.

Meanwhile, in LTE-A, a standard based on a single carrier in LTE is discussed, and a combination of several bands having a band smaller than 20 MHz is discussed, while a component carrier band having a band above 20 MHz is discussed. have. Carrier Aggregation (CA) is discussed in LTE-A based on LTE's basic specifications, with maximum consideration for backward compatibility and maximum in uplink and downlink. Five carriers are considered. Among the issues discussed in this carrier aggregation, how to configure the expansion of the control channel and how to configure the data channel as the number of carriers increases.

CA refers to an environment in which a base station and a terminal transmit and receive signals using at least one CC. These multiple component carriers may exist adjacent to each other or may exist in a frequency band spaced apart from each other. In addition, since the downlink component carrier and the uplink component carrier exist independently, the number may or may not be the same.

3GPP LTE-A refers to a method of increasing communication quality and capacity by combining a plurality of bands, unlike an existing LTE system configured by allocating one band or carrier for downlink and uplink for FDD. . TDD follows a scheme of extending an existing single band or carrier allocated to the entire uplink and downlink.

In configuring the carrier aggregation method, the standard for a single carrier supported by the existing LTE standard, which is an important design criterion, can be utilized to the maximum. Therefore, the existing LTE Rel.8 standard has a standard for a case having various bandwidths, and the design of individual carriers in the carrier aggregation is the existing Rel. It can be implemented to apply the maximum of 8 standards. In carrier aggregation, a maximum carrier assignable to a specific UE is different for each UE, and the maximum carrier set may be defined differently for each UE. This maximum possible carrier set may be defined as a configuration component carrier set.

In the carrier aggregation, the existing Rel. The 8 standard extends to a number of component carriers. That is, the existing standard consisting of a single component carrier is extended to a plurality of component carriers, cross-carrier scheduling is possible so that scheduling from one component carrier to another component carrier is possible. To this end, the control information may be included in the PDCCH to enable scheduling between carriers. For example, by adding a carrier indicator field (CIF), which is a carrier indicator field, to a payload of a PDCCH, resources of another CC can be allocated. Currently, a 3-bit CIF can be allocated, and up to five component carriers can be indicated. That is, only five values among the possible values of 0 to 7 are allocated to the component carriers, and the remaining three values are not used (reserved). Of course, the number of component carriers can be extended according to the system implementation.

Meanwhile, in carrier aggregation, a primary component carrier (PCC) and a secondary component carrier (SCC) exist. The major carrier refers to a component carrier that plays a major role in control information and data transmission in the communication between the eNB and the UE, and may be configured to be UE specific. Component carriers other than PCC are defined as SCC. Major measurement signals or control information can be transmitted and received through the PCC, and SCC can be allocated through the PCC. That is, the downlink PCC may allocate both a DL grant and an UL grant for another SCC although it is a single component carrier by intercarrier scheduling. The uplink PCC can appropriately allocate the PUCCH to the uplink explicitly or implicitly, thereby allocating resources for a plurality of CCs. In this case, explicit resource allocation means a case of explicitly indicating resource allocation through higher layer signaling, and implicit resource allocation indicates a resource allocation through an appropriate rule including a position in a control region of a PDCCH. Means.

2 is a diagram illustrating carrier aggregation and intercarrier scheduling to which the present invention is applied.

In FIG. 2, there are three component carriers 210, 220, and 230 in the downlink DL, of which 210 is the main component carrier (PCC). Similarly, there are two component carriers 260 and 270 in the uplink (UL), of which 260 is the primary component carrier. That is, 210 and 260 are linked with downlink / uplink primary component carriers. The downlink component carrier includes a PDCCH for providing control information and a PDSCH for providing data information. In the PDCCH, resources of a PDSCH and a PUSCH may be allocated.

The PDCCH 211 provides grant (allocation) information for the PDSCH 216 in the same component carrier, and the PDCCH 215 is a grant for the PUSCH 261 of the uplink component carrier 260 linked to the same component carrier. (Assignment) information, and the PDCCH 212 and the PDCCH 213 are the grant (allocation) information for the PDSCH 216 of the sub-carrier DL SCC1 220 and the PDSCH of the sub-carrier DL SCC2 230, respectively. Grant (allocation) information for (226) is provided. The PDCCH 214 provides grant (allocation) information for the PUSCH 271 of the subcarrier UL SCC1 270.

In summary, data transmission from the eNB to the UE is made by PDSCH, and data transmission from the UE to the eNB is made by PUSCH. The control channel (e.g., transmission mode) for communication between the eNB and the UE is semi-statically transmitted to the UE by higher layer signaling and then assigned to the shared channel. A control channel for transmitting dynamic resource allocation information and control information required for transmission is required, which is a PDCCH. As shown in FIG. 2, the PDCCH is located at a certain portion of the control region in the subframe and is decoded through blind decoding at the UE entry. The PDCCH is divided into various DCI formats and provides common control information or UE specific control information. When transmitting UE-specific control information, the UE may provide information for PDSCH or PUSCH decoding at the UE location and also provide control information necessary for communication to the UE.

Meanwhile, in carrier aggregation, component carriers may be activated or deactivated. A specific UE can set the maximum usable carrier set as a configuration carrier set, and enable or disable a specific component carrier in such a configuration carrier set to efficiently use radio resources. Hereinafter, an embodiment of the present invention will be described as an example in which component carriers in a component carrier set are activated or deactivated. However, the present invention is not limited thereto, and an activation or deactivation mechanism is performed in all component carriers. Can also be used.

Activation / deactivation of the component carrier according to an embodiment of the present invention may be based on a downlink component carrier (DL CC). That is, when the uplink carrier is linked to the downlink component carrier (SIB2-linked), it can follow the active or inactive state of the linkage downlink carrier. Meanwhile, the downlink channel state is represented by Channel State Information (CSI) by Channel Quality Indicator (CQI) and Precoding Matrix Indicator (PMI) or RI (Rank Indicator), and the UE transmits information on the uplink through eNB. You can see the channel status.

CSI is not measured by the UE if scheduling is not performed for the inactive downlink carrier. On the contrary, PDSCH allocation for the activated downlink carrier is performed and CSI measurement is also made by the UE and reported to the eNB. The active / deactivated scheme is applied for reducing complexity / power requirements of the UE.

3 is a view showing a linkage relationship of up and down carriers in a carrier aggregation environment according to an embodiment of the present invention.

The downlink main component carrier DL PCC 310 has a linkage relationship with the uplink main component carrier UL PCC 360, and the downlink subcomponent carrier DL SCC1 320 has a linkage relationship with the uplink subcomponent carrier UL SCC1 370. to be. The downlink subcomponent carrier DL SCC2 330 is in a state where there is no linkage uplink component carrier.

Activation / deactivation of the component carrier is determined by the eNB, and when the UE is controlled by MAC signaling and there is an error in MAC signaling, there may be ambiguity between the eNB and the UE during the corresponding signaling or configuration period. . In addition, a timer is set for an active component carrier and a PDCCH is deactivated if the PDCCH is not received until the timer runs out. . That is, a situation in which ambiguity occurs is a situation where the states of the component carriers that the eNB recognizes as activated / deactivated do not match the states of the component carriers that the UE recognizes as activated / deactivated.

4 is a diagram illustrating an ambiguity situation that can be applied to an embodiment of the present invention.

In FIG. 4, CC0 and CC2 are deactivated and CC1, CC3 and CC4 are activated as shown in 410. On the other hand, CC2, CC4 is inactive, CC0, CC1, CC3 is the activation state of the component carrier recognized by the UE, as shown in 420. That is, it can be seen that the situation recognized by the eNB and the situation recognized by the UE in CC0 and CC4 are different, and this can be said to be a state in which ambiguity has occurred.

The ambiguity generated in FIG. 4 may cause problems in CSI transmission. That is, the size of the CSI information transmitted in the uplink is determined according to a mode determined by higher signaling for each component carrier and when combined CSI information of each activated component carrier is transmitted, the combined CSI of the activated component carriers is activated / It may change depending on the deactivation state. Meanwhile, the channel state information is information to be used, that is, necessary for the activated component carrier. Therefore, when ambiguity occurs between the base station and the user terminal about which component carrier is activated or deactivated, the size of the CSI for the entire component carrier may change. That is, in the case of ambiguity, the length of information of the CSI may cause a problem, because the size of the CSI recognized by the eNB (known by the eNB) and the size of the CSI recognized by the UE may be different. This is because the payload of the CSI transmitted on the link may be recognized by the eNB at all differently even if there is no error caused by the uplink. For example, if the eNB recognizes that CC0, CC1, and CC3 are activated, and the UE recognizes that only CC1 and CC3 are activated, the eNB expects CSI information for three CCs to be transmitted. The information is decoded using the length (the length in which the CSI information for the three component carriers is stored), but since the UE transmits the CSI information for the two component carriers and the corresponding length, the mismatch and decoding between both information An error may occur.

In the above ambiguity, various schemes may be applied to overcome information mismatch between eNB and UE for deactivation or activation and to transmit information on a channel. E.g, The payload size of the CSI may be determined by the number of component carriers configured and the reporting mode instead of the number of activated component carriers and the reporting mode. That is, the payload is not changed by activation / deactivation and the payload is adjusted according to the number of component carriers determined by higher signaling and semi-statically determined and the reporting mode is configured. You can consider how you decide. In this case, in order to resolve the ambiguity, ai) CSI is transmitted for all configured component carriers, or a-ii) a specific bit value (e.g., a dummy bit equal to 0) in a CSI corresponding to an inactive component carrier. bit)) or a-iii) a method of adding a field indicating activation / deactivation of the component carrier configured in a region other than the CSI payload may be applied.

The scheme of a-i) increases the complexity and power usage of the UE, and the scheme of a-iii) may be considered that the size of the payload is achieved only by the active component carrier, in which case the size of the payload is increased.

The ambiguity of FIG. 4 discussed above considers two cases. In one case, the eNB is aware of activation, while the UE is inactive. In another case, the eNB recognizes the deactivation while the UE recognizes the deactivation. The scheme a-ii) is not a problem in a situation where the eNB recognizes the deactivation and the activation as the UE. Deactivation reported by the UE (based on eNB, the UE recognizes the activation as a specific component carrier and includes the measured value in the payload) .The CSIs for the component carrier can be ignored, but in the opposite case the eNB is activated and the UE is In a situation where it is recognized as deactivation, when the eNB recognizes the dummy CSI values as normal CSI values and utilizes the error values, the eNB may use error values, causing a downlink performance degradation.

Hereinafter, in the present invention, the UE transmits to the eNB by combining the information on the inactive / active with the information of the CSI so that the eNB can infer the information on the inactive / active of the CC, the eNB receives this information A method and apparatus for inferring whether a carrier is active or inactive are provided.

In the present invention, the UE combines information on whether the component carrier is activated with CSI information so that the eNB can infer the coding scheme (determined by the size of the payload) and the UE regardless of the payload size. The CSI may configure the entire CSI information by including the CSI information of the deactivated component carrier, which is recognized by the self, in the payload. If there is no CSI information reported to the eNB most recently, a default value is transmitted. The default value may consist of dummy bits. This will be described in FIG. 5.

Hereinafter, channel state information will be described as CSI, but the present invention is not limited thereto.

Aperiodic CSI reporting payload may be determined according to a reporting mode of a configured component carrier and the number of configured component carriers. For example, it can be defined as follows.

That is, in the CA environment, the aperiodic CSI request field includes 2 bits, and 1 bit among these bits includes 2 bits as follows, when the DCI format is added to the UE-specific search space. The value can be divided.

[Table 1]

Information in the common search space is as follows.

[Table 2]

This RRC is applicable to a combination of five component carriers.

In the above, "10" or "11" may be a subset of all component carriers configured by RRC signaling and may be applied to a subset of configured component carriers defined by "10" or "11". have. In this case, the size of the payload is determined based on a subset of configured component carriers that are predetermined by RRC and triggered by PDCCH, not the entire set of configured component carriers.

In addition, as in the case of "01", the downlink component carrier determined by the SIB-2 linkage relationship may be regarded as one of a subset of the component carriers configured even for one case. In this case, the SIB-2 linked downlink carrier is reported according to a given reporting mode (even if the number of configured component carriers is greater than one). The SIB-2 linkage relationship refers to a linkage relationship that the eNB informs the UE by the SIB-2 field of the system information.

That is, briefly looking at the process of requesting CSI aperiodically, the eNB determined that the reporting of the CSI of the UE needs to request the CSI report aperiodically. This is set as a value for aperiodic CSI report request in a 2 bit or 1 bit field in advance among the areas constituting the DCI format (DCI format indicating uplink allocation) of the PDCCH, as described in Tables 1 and 2 above. To request the set CSI report. If "00" or "0" means that it is not a CSI report request, and if it is set to "01", CSI information about DL CC determined by SIB-2 linkage relationship is provided to UL CC reporting CSI. It means to ask. In addition, "10" or "11" may provide CSI information on DL CCs of component carriers preset in RRC.

Pre-configured to RRC may include a set of component carriers requiring CSI information in information transmitted through an upper layer. CCs delivered through these RRCs may be configured in an eNB in various ways.

For example, when the component carrier set configured to be available to the UE is {CC1, CC2, CC3, CC4}, when the 2-bit setting of Table 1 is applied, two component carrier sets which are all or part of the configured component carrier set are used. A component carrier set may be allocated to "10" and "11", respectively, as RRC. The number of cases may vary, but in one embodiment, the CSI of {CC1, CC2} in case of "10" and the CSI of {CC3, CC4} in case of "11" may be measured and reported. . In another embodiment, in case of "10", the CSI of {CC1, CC3} may be measured, and in case of "11", the CSI of {CC2, CC4} may be measured and reported, and in another embodiment, "10". In case of "", the CSI of {CC1, CC2, CC3} may be measured, and in case of "11", the CSI of {CC2, CC3, CC4} may be measured and reported. Of course, "10" may instruct to report on all component carriers, and "11" may instruct to report on activated component carriers, including the case where the present invention may be modified and applied. .

In accordance with the indicated information above, the UE measures the CSI for the indicated, pre- promised or activated component carrier. Measuring the CSI, as described above, by measuring the CQI, PMI or RI and the UE transmits information about it in the uplink, the eNB can know the channel status.

It is called UCI (Uplink Control Information) including CQI, PMI or RI and ACK / NAK information.

The aperiodic CQI / PMI / RI report is scheduled when the bits indicating the aperiodic CSI are set in the uplink PDCCH by the eNB and multiplexed with the UL-SCH or transmitted only by the UCI without the UL-SCH. That is, a method of reporting CSI according to aperiodic CSI report request is divided into a single mode for transmitting only CSI information and a multiple mode multiplexed with CSI information and UL-SCH. The exclusive mode is transmitted with only CSI information included in the PUSCH (UCI only on PUSCH, or without UL-SCH), and the multiple mode is transmitted with UL-SCH included (with UL-SCH). However, in order to report CSI in any one of these two modes, the UE should receive an indication from the eNB which reporting mode to take. To make this indication, it can be indicated in an implicit manner. For example, in relation to the reporting method of the CQI, the reporting mode may be indicated based on the value of a specific field as shown in Equation 1.

[Equation 1]

Exclusive mode = (CQI request field = 1) and (I _MCS = 29) and (N _PRB <= 4)

This is a case where the value of the field requesting CQI reporting is 1, the value indicating the Modulation and Coding Scheme (MCS) level (I _MCS ) is 29, and the number of physical resource blocks ( _PRBs ) is 4 or less. Aperiodic CQI can be reported. That is, when the eNB requests the report of the CQI and uplink allocation to satisfy Equation 1, the UE may measure the state of the channel according to the report request and report the measured value in the standalone mode.

In the case of Equation 1, it is applicable when the CQI request field is 1 bit.

In the transmission of UCI information such as CSI, QPSK modulation is basically used. As a CA environment, the CQI request field is extended to 2 bits, and DCI formats for uplink allocation are 0 (DCI format 0) and 4 ( (DCI format 4, SU-MIMO is supported). In this case, the schemes of Tables 3 and 4 can be applied to signal a single mode for transmitting only UCI information.

Table 3 shows the conditions for reporting in exclusive mode in DCI format 0 (considering QPSK transmission mode).

[Table 3]

Table 4 lists the requirements for reporting in standalone mode in DCI format 4 (considering QPSK transmission mode). Table 4 indicates only the case of one transport block.

[Table 4]

Tables 3 and 4 are applicable only when using QPSK and when there is only one transport block. Therefore, when a different modulation scheme is used, or when two transport blocks are used and two code blocks are required, a method of indicating a reporting mode is required.

If N _PRB is large in uplink allocation, transmission efficiency may be reduced. However, if it is too small, it may not provide enough information. Therefore, while N _PRBs in a range suitable for a single mode for transmitting only UCI are selected, it is necessary to allow the UE to recognize that the UE provides information on channel status in the single mode through the N _PRB value.

In an embodiment of the present invention, in determining the single / multiple mode of the reporting mode through N _PRB as shown in Equation 2, the control information and data requirements of the user UE, the QoS of the UE, and the scheduling policy of the eNB are not predetermined values. It is determined by the eNB so as to fit the situation, and the UE checks this so that information about the channel state can be transmitted in a single mode or a multiple mode. Equation 2 can be applied when the value of a specific field is set to request aperiodic CSI ("01", "10", "11" as in the example of Table 1, or "1" as in the example of Table 2). . In addition, Equation 2 may be applied to both a report on one DL CC and a report on multiple DL CCs, and may be applied to both the case of one and two transport blocks. The specific field for requesting aperiodic CSI may vary depending on the implementation method, and may be a field for requesting aperiodic reporting such as CQI, RI, and PMI.

[Equation 2]

Exclusive Mode = (Request Aperiodic CSI Reporting) and (I _MCS = P) and (N _PRB <= X)

In Equation 2, P is normally set to 29 in DCI formats 0 and 4, and is promised between the eNB and the UE. However, P may be promised as a value such as 30 and 31 in addition to 29.

X is a mode delimiter as a criterion for selecting N _PRB of the most suitable size for reporting CSI information in standalone mode. In one embodiment of the present invention can be calculated by applying the equation (3).

[Equation 3]

또는

or

는 a 보다 크거나 같은 정수 중에서 최소값을 가지는 정수를 의미하며, max(a, b)는 a, b 중 큰 수를 선택하는 것을 의미한다.remind

Is an integer having a minimum value among integers greater than or equal to a, and max (a, b) means selecting a larger number of a and b.

In Equation 3, d is a constant constant, which is assumed to be 4 in one embodiment of the present invention. Also c is assumed to be 8 as a constant. The values of c and d may be set to a specific value, or may be set by the eNB according to a system situation and a system coefficient to deliver a value set through higher layer signaling (eg, RRC signaling).

N and S serve as a reference for selecting an appropriate N _{PRB. According} to an embodiment of the present invention, N and S may have the following values.

N may be determined according to the number of component carriers, which may be the number of configured component carriers or the number of activated component carriers.

i) number of component carriers configured by RRC signaling;

This may be the total number of component carriers composed of N values.

It will be described based on the CQI which is an embodiment of the CSI.

N = 1 when the CQI request field is 1 bit.

On the other hand, when the CQI request field is 2 bits, the number of element carriers configured in " 10 " and " 11 ", which is a subset (subset) of all element carriers by RRC signaling (the 2-bit field of PDCCH is " 10 " Depending on having a value of "11").

ii) the number of activated component carriers among the component carriers configured by RRC signaling;

This may be the number of activated component carriers among all component carriers composed of N values.

If the CQI request field is 2 bits, the number of component carriers that are activated among the component carriers configured by RRC signaling in a subset of total component carriers "10" and "11" (the 2-bit field of PDCCH is "10" or " Depends on having a value of 11 ").

Of course, in addition to i) and ii), N may be fixed to the maximum possible value of the system (the total number of component carriers). In a system having five component carriers, it may have a fixed value of N = 5.

S may be determined in relation to the transmission information. For example, the value of S may be determined according to the modulation order of the transport block. That is, in case of having one transport block, the value of S may be set to have a modulation order value of one transport block. In addition, in the case of having two transport blocks, the value of S may be set to the sum of modulation orders of each of the two transport blocks.

Here, the modulation order means the number of bits modulated by one symbol, QPSK has 2, 16QAM is 4, and 64QAM has 6 modulation orders. When the modulation order of one transport block is Q1 and the modulation orders of two transport blocks are Q1 and Q2, respectively, S is calculated as follows.

S = Q1 if there is only one transport block

S = Q1 + Q2 with two transport blocks

Looking at the embodiment to which the present invention is applied as follows. In one embodiment, CQI is provided to provide channel state information. However, the present invention is not limited thereto. In the case of two transport blocks, the modulation order of each transport block may be the same.

FIG. 5 is a diagram illustrating a case in which a value of N to which an embodiment of the present invention is applied is based on a configured CC.

Assume that the configured total number of component carriers is five (CC0, CC1, CC2, CC3, CC4), such as 510. In DCI format 4, two transport blocks TB1 and TB2 are used as shown in 520. Each modulation scheme is QPSK and 16QAM, and modulation orders Q1 and Q2 are 2 and 4, respectively. In addition, as shown in Table 1, when the CQI request field is "10", CC0, CC1, and CC2 are configured by RRC signaling and when "11", CC3 and CC4 are configured. When the eNB signals by setting the CQI request field of the PDCCH to "10", the value of X may be determined as follows (N = 3, S = 2 + 4).

If the PDCCH signals "11", N becomes 2,

.

Therefore, when the eNB requests aperiodic CQI reporting, if the N _PRB value is set to 4 if the CQI request field is set to "10" or to 3 or less if the CQI request field is set to "11", the UE is determined from higher layer configuration information. Since N and S can be identified, the CQI report can be performed in a single mode by calculating the value of X through N and S.

FIG. 6 is a diagram illustrating a case in which a value of N to which another embodiment of the present invention is applied is based on a configured CC.

Assume that all configured component carriers are five (CC0, CC1, CC2, CC3, CC4) as shown in 610. One transport block is used as in DCI format 0 to 620. The modulation scheme is QPSK, and the modulation order is 2. This is the case when CC0, CC1, and CC2 are configured by RRC signaling when the CQI request field is "10", and CC3 and CC4 are configured when "11". When the eNB signals by setting the CQI request field of the PDCCH to "10", the value of X may be determined as follows (N = 3, S = 2).

If the PDCCH signals "11", N becomes 2,

.

Here, the c value may be changed when adjustment is needed, such as in the case of Extended CP. For example, the extended CP may be implemented to have a value of c = 12 or 16.

I _MCS = the other condition indicative of the single mode and multi-mode 29 may also go for the value of I _MCS = 31, as well as I _MCS = 30 with respect to the QAM may be another condition.

FIG. 7 illustrates a case in which a value of N to which another embodiment of the present invention is applied is based on an activated CC.

A total of five component carriers (CC0, CC1, CC2, CC3, CC4) as shown in 710, it is assumed that the CC0, CC2, CC3 is activated. As shown in 720, two transport blocks are used in DCI format 4, and the modulation orders Q1 and Q2 are 2 and 4. This is the case when CC0, CC1, and CC2 are configured by RRC signaling when the CQI request field is "10", and CC3 and CC4 are configured when "11". When the eNB signals by setting the CQI request field of the PDCCH to "10", the number of activated CC0 and CC2 among the CCs indicated by "10" can be N, in which case, the value of X is as follows. Can be determined together (N = 2, S = 2 + 4)

In this case, N is 1 and X is 2 since the PDCCH activates only CC3 when the PDCCH signals “11”.

FIG. 8 illustrates a case in which a value of N to which another embodiment of the present invention is applied is based on an activated CC.

It is assumed that the configured total CCs are five (CC0, CC1, CC2, CC3, CC4) as shown in 810, among which CC0, CC2, and CC3 are activated. When one transport block is used in DCI format 0 as shown in 820, and the modulation scheme is QPSK with modulation order 2 and the CQI request field is "10", when CC0, CC1 and CC2 are configured by RRC signaling and "11". This is the case when CC3 and CC4 are configured. When the eNB signals by setting the CQI request field of the PDCCH to "10", the activated component carriers are CC0, CC2, the value of X can be determined as follows. (N = 2, S = 2)

If the PDCCH signals "11", N is 1 since only CC3 is activated, and the value of X may be determined as follows. (N = 1, S = 2)

In FIG. 7 and FIG. 8, the UE may refer to an activated component carrier recognized by the UE.

In all of the above examples, the value of N can be applied as a constant value. For example, an X value may be configured by fixing N = 5. In this case, X has a constant value regardless of the number of component carriers.

In this case, the problem of ambiguity described in FIG. 4 may occur. Therefore, in order to resolve the ambiguity, the UE may provide the eNB with the CSI reporting information on the activated component carrier and the information on the disabled component carrier, which the UE recognizes. For example, the CSI value of the deactivated component carrier may be transmitted as the most recently updated CSI value, or the deactivated / activated component carrier information may be masked and transmitted to the CRC.

FIG. 9 is a diagram illustrating a process of determining a reporting mode in order to request aperiodic channel state information from a base station according to an embodiment of the present invention and requesting reporting of the aperiodic channel state information to the user terminal accordingly. to be.

The base station determines that aperiodic channel state information of the user terminal is necessary (S910). If it is determined that it is necessary, the component carriers requiring the channel state information are selected, and the value of the first field of the payload is set to request reporting of the channel state information of the corresponding component carrier (S920). The mode delimiter is calculated from at least one of report request indication information and a carrier aggregation configuration, a transmission scheme, and an adaptive modulation scheme of the user terminal (S930). The mode delimiter may be calculated from at least one of the report request indication information and the carrier aggregation configuration, transmission method, and adaptive modulation method of the user terminal. Calculating X. X is information for allowing a user terminal to distinguish between a single mode and a multiple mode as described in Equations 2 and 3. The reporting method of the channel state information is determined (S940), and according to the reporting method (S950), the mode indication information is generated and set in the second field so as to have a value within the range distinguished by the mode separator. That is, in the case of the single mode, as described above, the mode indication information smaller than or equal to the mode separator is set in the second field (S952), and in the second mode, the mode indication information larger than the mode separator is set in the second field ( S954).

In operation S960, a signal encoding the payload including the first and second fields is transmitted to the user terminal, and a signal including channel state information is received from the user terminal (S970). The channel state information is extracted by decoding the received signal according to a reporting method indicated by the mode indication information (S980).

In FIG. 9, the first field may be a CSI request field, and the second field may be information N _PRB indicating a physical resource block. According to an embodiment of the present invention, the information I _MCS indicating the MCS level is set to a predetermined value 29, 30, 31, and the second field is information N _PRB indicating the physical resource block. If is less than or equal to the mode delimiter, it can be implemented by indicating a single mode. The mode delimiter may be calculated from at least one of the report request indication information and the carrier aggregation configuration, transmission method, and adaptive modulation method of the user terminal. Calculating X. As shown in Equations 2 and 3, X is calculated by the user terminal confirming information such as the carrier aggregation configuration, transmission scheme, and adaptive modulation scheme, and indicates the physical resource block using the information in the second field. In addition to checking the information (N _PRB ), it is possible to distinguish between single mode and multiple modes.

The mode separator has been described in Equation 3 in proportion to the number of component carriers configured or activated in the user terminal and inversely proportional to the modulation order of the channel state information. That is, it may be calculated in N, which is a configured or activated component carrier, and S, which is a modulation order of a channel, where X, a mode separator, is proportional to N and inversely proportional to S. That is, as the number of CCs increases, channel state information to be transmitted increases, so that the information N _PRB indicating the physical resource block must also increase, thereby increasing the mode identifier. In addition, if the modulation order of the channel is increased or the transport block is increased, the result of encoding information to be transmitted is reduced, so that the mode separator can be made smaller.

10 is a user terminal according to an embodiment of the present invention receives a request for reporting of the aperiodic channel state information from the base station, confirms the reporting method in the payload including the report request and accordingly aperiodic channel state information to the base station Is a diagram illustrating a process of transmitting a message.

The user terminal receives a signal in which the payload is encoded from the base station (S1010). If the first field of the payload is set to report request indication information indicating aperiodic channel state information report, channel state information for one or more CCs indicated by the report request indication information is measured (S1020). The first field may be a CSI request field. In operation S1030, a mode separator is calculated based on at least one of report request indication information and a carrier aggregation configuration, a transmission scheme, and an adaptive modulation scheme of the user terminal. The mode separator may be calculated each time, or the user terminal may have a value calculated in advance. The mode separator may be calculated from the number of component carriers or activated component carriers configured in FIGS. 5, 6, 7, and 8, a report request method, and a channel modulation method. The mode indication information of the second field of the payload is compared with the mode separator to determine whether the reporting method is the single mode or the multi mode (S1040). The second field may be information N _PRB indicating a physical resource block. If the reporting method is the single mode, that is, if the mode indication information is less than or equal to the mode identifier, only the channel state information is included in the payload to be transmitted (S1052). If the reporting method is the multi mode, the other information and the channel state are included. The information is multiplexed and included in the payload (S1054). According to an embodiment of the present invention, as described above, in the single mode, only the CSI information is included in the PUSCH (S1052). In the multi mode, the PUSCH and the CSI information including the UL-SCH are multiplexed. .

Thereafter, a signal is generated by encoding a PUSCH (S1060), and the generated signal is transmitted to a base station (S1070).

According to an embodiment of the present invention, the information I _MCS indicating the MCS level is set to a predetermined value 29, 30, 31, and the second field is information N _PRB indicating the physical resource block. If is less than or equal to the mode delimiter, it can be implemented by indicating a single mode.

One example of reporting the channel state information may be CQI / PMI / RI reporting, which is configured by RRC signaling by an eNB, which is a base station, in a relationship between a downlink transmission mode and a possible CQI report type. The CQI report type may be divided into a wideband feedback scheme and an eNB configuration subband feedback scheme. First, in case of wideband feedback, a UE, which is a user terminal, measures one wideband CQI value for the entire system band. In case of eNB configuration subband feedback, the UE measures one wideband CQI value for the entire system band and additionally measures and reports the CQI value for each subband. To this end, the UE may measure and report a value in 2-bit differential form of a wideband CQI value, that is, it may be calculated as "subband incremental CQI offset = subband CQIindex-wideband CQI index" as follows. have. The size k of each subband may be set as shown in Table 5, but this may be configured differently according to an implementation method.

[Table 5]

The possible subband incremental CQI offset can be four values of {<=-1, 0, +1,> = + 2}, and with the UE selected subband feedback, the UE is assigned to M preferred subbands of size k. Can be reported by measuring the CQI value in incremental form.

In this case, the subband incremental CQI is a value obtained by subtracting the wideband CQI index from the average indexes of the M preferred subbands, where the possible subband incremental CQI offsets are {<= + 1, +2, +3,> = + 4}. It is four values of and is represented by an enumerative source coding indicating a preferred subband and can be measured and reported. The reporting mode can be selected by combining the CQI with the PMI. As shown in Table 6, the combined mode can be selected according to the CQI feedback type and the PMI feedback type, and the combined mode is used to determine the transmission mode.

TABLE 6

The above process is an embodiment meaning various configuration information necessary for the UE to measure to report the CQI / PMI, the present invention is not necessarily limited thereto. The UE may measure the channel state and collect the channel state information of the downlink component carrier in various ways and generate the information as CQI, PMI, RI, and the like.

11 is a diagram illustrating a configuration of a base station according to an embodiment of the present invention. The base station of FIG. 11 determines a reporting mode in order to request aperiodic channel state information from a user terminal, requests a user terminal to report aperiodic channel state information, and reports aperiodic channel state information from the user terminal. Will receive.

The overall configuration is composed of the channel state information extraction unit 1110, the control unit 1120, and the transceiver unit 1130.

When the controller 1120 determines that the aperiodic channel state information of the user terminal is necessary, and determines that it is necessary, the controller 1120 selects the component carriers requiring the channel state information and requests the report of the channel state information of the component carrier. Set the value of the first field. The controller 1120 calculates a mode separator in at least one of report request indication information and a carrier aggregation configuration, a transmission scheme, and an adaptive modulation scheme of the user terminal. The mode delimiter may be calculated from the report request indication information and the carrier aggregation configuration, transmission scheme, and adaptive modulation scheme of the user terminal. As an embodiment, X is calculated from FIGS. 5, 6, 7, 8, and description. It includes the process of doing. X is information for allowing a user terminal to distinguish between a single mode and a multiple mode as described in Equations 2 and 3. The controller 1120 determines the reporting method of the channel state information, generates and sets the mode indication information in the second field so as to have a value within a range distinguished by the mode separator according to the reporting method. That is, in the single mode, as described above, mode indication information smaller than or equal to the mode separator is set in the second field, and in the multi mode, mode indication information larger than the mode separator is set in the second field.

The transceiver 1130 transmits a signal encoding the payload including the first and second fields to the user terminal, and receives a signal including channel state information from the user terminal. The channel state information extractor 1110 extracts the channel state information by decoding the received signal according to a reporting method indicated by the mode indication information.

In FIG. 11, the first field may be a CSI request field, and the second field may be information N _PRB indicating a physical resource block. According to an embodiment of the present invention, the information I _MCS indicating the MCS level is set to a predetermined value 29, 30, 31, and the second field is information N _PRB indicating the physical resource block. If is less than or equal to the mode delimiter, it can be implemented by indicating a single mode. The mode delimiter may be calculated from at least one of the report request indication information and the carrier aggregation configuration, transmission method, and adaptive modulation method of the user terminal. Calculating X. As described in Equations 2 and 3, X is calculated by the user terminal confirming information such as a carrier aggregation configuration, a transmission scheme, and an adaptive modulation scheme, and indicates the physical resource block using the information in the second field. In addition to checking the information (N _PRB ), it is possible to distinguish between single mode and multiple modes.

The mode separator has been described in Equation 3 in proportion to the number of component carriers configured or activated in the user terminal and inversely proportional to the modulation order of the channel state information. That is, it may be calculated in N, which is a configured or activated component carrier, and S, which is a modulation order of a channel, where X, a mode separator, is proportional to N and inversely proportional to S. That is, as the number of CCs increases, channel state information to be transmitted increases, so that the information N _PRB indicating the physical resource block must also increase, thereby increasing the mode identifier. In addition, if the modulation order of the channel is increased or the transport block is increased, the result of encoding information to be transmitted is reduced, so that the mode identifier can be made smaller.

12 is a diagram illustrating a configuration of a user terminal according to an embodiment of the present invention. The user terminal is a diagram illustrating a process of receiving a request for reporting of aperiodic channel state information from a base station, checking a reporting method in a payload including a corresponding report request, and transmitting aperiodic channel state information to the base station accordingly.

The overall configuration includes a transceiver 1230, a controller 1220, and a channel state information generator 1210 for transmitting and receiving a signal encoded by a base station and a payload.

The controller 1220 receives a signal in which the user terminal received by the transceiver 1230 encodes the payload from the base station. When the first field of the payload is set to report request indication information indicating aperiodic channel state information report, channel state information for one or more CCs indicated by the report request indication information is measured. The first field may be a CSI request field. The mode separator is calculated from at least one of report request indication information and a carrier aggregation configuration, a transmission scheme, and an adaptive modulation scheme of the user terminal. The mode separator may be calculated each time, or the user terminal may have a value calculated in advance. The mode separator may be calculated from the number of component carriers or activated component carriers configured in FIGS. 5, 6, 7, and 8, a report request method, and a channel modulation method. The channel state information generation unit 1210 compares the mode indication information of the second field of the payload with the mode delimiter, checks whether the reporting method is the single mode or the multi mode, and if the reporting method is the single mode, that is, the mode indication. If the information is less than or equal to the mode separator, only the channel state information is included in the payload to be transmitted. If the reporting method is multi-mode, the other information and the channel state information are multiplexed and included in the payload. The second field may be information N _PRB indicating a physical resource block. According to an embodiment of the present invention, as described above, in the single mode, only the CSI information is included in the PUSCH, and in the multi mode, the PUSCH and the CSI information including the UL-SCH are multiplexed.

Thereafter, the PUSCH is encoded to generate a signal, and the transceiver 1230 transmits the generated signal to the base station.

According to an embodiment of the present invention, the information I _MCS indicating the MCS level is set to a predetermined value 29, 30, 31, and the second field is information N _PRB indicating the physical resource block. If is less than or equal to the mode delimiter, it can be implemented by indicating a single mode.

The present invention discloses and proposes a method for properly transmitting UCI information even in the case of a QAM and two or more transport blocks.

If the X value does not have an appropriate value and has a large value, the UCI information shows an excessively better performance than the system requires and becomes an overhead. PDCCH By configuring the X value according to the method proposed in the present invention, it is possible to reduce the overhead while having a performance appropriate to the system requirements.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas falling within the scope of the same shall be construed as falling within the scope of the present invention.

Claims (16)

Setting a first field of a payload as report request indication information indicating aperiodic channel state information reporting of a user terminal, and setting mode field information as implicitly indicating a reporting method of the channel state information in a second field;
Transmitting a signal encoding the payload including the first and second fields to the user terminal and receiving a signal including channel state information from the user terminal; And
Extracting the channel state information by decoding the received signal according to a reporting method indicated by the mode indication information,
The mode indication information indicates a single mode or a multiple mode, and can be distinguished by a mode identifier calculated in at least one of the report request indication information and the carrier aggregation configuration, transmission method, and adaptive modulation method of the user terminal. A method for receiving channel state information in a wireless communication system.
The method of claim 1,
The first field is a CSI request field, and the second field is information indicating a physical resource block.
The method of claim 1,
The mode delimiter is proportional to the number of component carriers configured or activated in the user terminal, and the user terminal receives channel state information in a wireless communication system, characterized in that inversely proportional to the modulation order of the channel state information. Way.
The method of claim 1,
The setting step
And setting the second field such that the mode indication information is less than or equal to the mode identifier when the reporting method is the single mode.
Receiving a signal obtained by encoding a payload from a base station;
Measuring channel state information for one or more CCs indicated by report request indication information when the first field of the payload is set to report request indication information indicating aperiodic channel state information report;
Generating a signal by encoding the measured information in a single mode or a multiple mode according to mode indication information included in a second field of the payload; And
Transmitting the generated signal to the base station,
Mode indication information is distinguishable by a mode identifier calculated from at least one of the report request indication information and the carrier aggregation configuration, transmission scheme and adaptive modulation scheme of the user terminal, channel state information in a wireless communication system How to send.
6. The method of claim 5,
The first field is a CSI request field, and the second field is information indicating a physical resource block.
6. The method of claim 5,
The mode identifier is proportional to the number of component carriers configured or activated in the user terminal, and the user terminal is inversely proportional to the modulation order of the channel state information. Way.
6. The method of claim 5,
And if the mode indication information of the second field is smaller than or equal to the mode identifier, the reporting method is a single mode.
A control unit for setting a first field of a payload as report request indication information indicating aperiodic channel state information reporting of a user terminal, and setting a second field as mode indication information that implicitly indicates a reporting method of the channel state information;
A transmitter / receiver for transmitting a signal encoding the payload including the first and second fields to the user terminal and receiving a signal including channel state information from the user terminal; And
A channel state information extracting unit configured to extract the channel state information by decoding the received signal according to a reporting method indicated by the mode indication information;
The mode indication information indicates a single mode or a multiple mode, and can be distinguished by a mode identifier calculated in at least one of the report request indication information and the carrier aggregation configuration, transmission method, and adaptive modulation method of the user terminal. And receiving channel state information in a wireless communication system.
The method of claim 9,
And wherein the first field is a CSI request field, and the second field is information indicating a physical resource block.
The method of claim 9,
The mode delimiter is proportional to the number of component carriers configured or activated in the user terminal, and the user terminal receives channel state information in a wireless communication system, characterized in that inversely proportional to the modulation order of the channel state information. Device.
The method of claim 9,
The control unit
And setting the second field so that the mode indication information is less than or equal to the mode identifier when the reporting method is the single mode.
A transceiver for transmitting and receiving a signal encoded with a base station and a payload;
A channel state of one or more component carriers indicated by report request indication information when the first field of the payload is set to report request indication information indicating aperiodic channel state information report by encoding a signal received by the transceiver; A control unit for measuring information;
A channel state information generator for generating a signal by encoding the measured information in a single mode or a multi mode according to mode indication information included in a second field of the payload,
Mode indication information can be distinguished by a mode identifier calculated in at least one of the report request indication information and the carrier aggregation configuration, transmission scheme, and adaptive modulation scheme of the user terminal, the channel state in a wireless communication system Device for sending information.
The method of claim 13,
And wherein the first field is a CSI request field, and the second field is information indicating a physical resource block.
The method of claim 13,
The mode identifier is proportional to the number of component carriers configured or activated in the user terminal, and the user terminal is inversely proportional to the modulation order of the channel state information. Device.
The method of claim 13,
And if the mode indication information of the second field is less than or equal to the mode identifier, the reporting method is a single mode.

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