KR20120080509A - Methods for transmitting or processing control information in telecommunication system and apparatus using the methods - Google Patents

Abstract

PURPOSE: A method for transmitting control information and a base station thereof and a method and apparatus for processing control information and a terminal thereof in a communication system are provided to improve system performance by enhancing system transmission efficiency. CONSTITUTION: A DCI format 0(510) has additional 2 bits for a non-periodic SRS triggering field(512) and a non-periodic CSI triggering field(514) along with uplink resource allocation information(511). Differentiation bits(516) exist for identifying continuous/discontinuous allocation. The uplink resource allocation information includes the resource allocation information used for the transmission of upward link data. The non-periodic SRS triggering field includes flag information or field information directing non-periodic SRS triggering. The non-periodic CSI triggering field includes the flag information or the field information directing the non-periodic CSI triggering. The differentiation bits for identifying the continuous/discontinuous allocation can be redundant bits which basically exist.

Description

Methods for transmitting control information in a communication system, a base station, a method for processing control information, and a terminal thereof [Methods for Transmitting or processing Control information in Telecommunication System and Apparatus using the methods}

The present specification relates to a communication system, and relates to a method for transmitting and processing control information and a base station and a terminal therefor.

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

In the current mobile communication systems such as 3GPP, Long Term Evolution (LTE), LTE-A (LTE Advanced), etc., it is a high-speed, high-capacity communication system that can transmit and receive various data such as video and wireless data beyond voice-oriented services. Not only is the development of technology capable of transmitting large amounts of data comparable to wired communication networks, but also appropriate error detection methods that can improve system performance by minimizing the reduction of information loss and increasing system transmission efficiency have become essential. .

According to an embodiment of the present invention, in a communication system, a base station generates control information in a DCI format further including a bit indicating one of continuous resource allocation or discontinuous resource allocation and a bit additionally configuring a part of the resource allocation field. Making; And transmitting control information of the DCI format to a terminal through a physical downlink control channel.

Another embodiment of the present invention provides a communication system for receiving control information from a base station in a physical downlink control channel in a DCI format further including a bit indicating whether the terminal allocates continuous / discontinuous resource allocation and a bit additionally configuring a portion of the resource allocation field. Step and; It provides a control information processing method comprising the step of interpreting the control information of the DCI format.

Another embodiment is a base station for transmitting control information to a terminal in a communication system, the same size as the included DCI format O with the addition of the aperiodic SRS triggering bit and the aperiodic SRS triggering bit, during continuous resource allocation or discontinuous resource allocation And a signal encoding unit for generating control information including a bit indicating one and a bit additionally configuring a part of the resource allocation field in a DCI format, and transmitting the control information in the DCI format to a terminal through a physical downlink control channel. Provide a base station.

Another embodiment is a terminal for receiving and processing control information from a base station in a communication system, the same size as the included DCI format O with the addition of the aperiodic SRS triggering bit and the aperiodic SRS triggering bit, continuous resource allocation or discontinuous resources A signal decoding unit for receiving control information further including a bit indicating one of the allocations and a bit additionally configuring a part of the resource allocation field from the base station in the physical downlink control channel in DCI format and interpreting the control information in the DCI format. It provides a terminal that includes.

Yet another embodiment includes a bit in which a base station indicates one of continuous resource allocation or discontinuous resource allocation, a local / distribution allocation flag indicating a type of virtual resource block, and a resource allocation field indicating resource allocation. Combining control allocation / fragment allocation flag and the resource allocation field to generate control information indicative of discontinuous resource allocation in a DCI format; And transmitting control information of the DCI format to a terminal through a specific channel.

Yet another embodiment includes a bit in which a base station indicates one of continuous resource allocation or discontinuous resource allocation, a local / distribution allocation flag indicating a type of virtual resource block, and a resource allocation field indicating resource allocation. / Combining the allocation allocation flag and the resource allocation field to receive control information indicating discontinuous resource allocation from the base station in the physical downlink control channel in DCI format; It provides a control information processing method comprising the step of interpreting the control information of the DCI format.

Another embodiment is a base station for transmitting control information to a terminal in a communication system, wherein the base station has a bit indicating one of continuous resource allocation or discontinuous resource allocation, a local / distribution allocation flag indicating a type of a virtual resource block, and resource allocation. And a resource allocation field indicating a resource allocation field and generating the control information indicative of discontinuous resource allocation in a DCI format by combining the local / distribution allocation flag and the resource allocation field. Provided is a base station including a signal coding unit to transmit.

Another embodiment is a terminal for receiving and processing control information from a base station in a communication system, comprising: a bit indicating either a continuous resource allocation or a discontinuous resource allocation, a local / distribution allocation flag indicating a type of a virtual resource block, or a resource allocation And a resource allocation field indicating a resource allocation field and receiving control information indicating discontinuous resource allocation from a base station in a physical downlink control channel in a DCI format by combining the local / distribution allocation flag and the resource allocation field. Provided is a terminal including a signal decoding unit to analyze.

1 is a diagram schematically illustrating a wireless communication system to which an embodiment of the present invention is applied.
2 is a flowchart illustrating a configuration of a PDCCH according to another embodiment.
3 is a flowchart illustrating PDCCH processing.
4 illustrates an example of a format of DCI format 0 and DCI format 1A among information payload formats of the PDCCH of FIG. 2.
FIG. 5 illustrates another example of formats of DCI format 0 and DCI format 1A among the information payload formats of the PDCCH of FIG. 2.
FIG. 6 illustrates a signal flow for transmitting an aperiodic SRS through an uplink component carrier additionally configured using the aperiodic SRS triggering message of FIG. 5 according to another embodiment.
FIG. 7 illustrates a signal flow of transmitting an aperiodic CSI using the aperiodic CSI triggering message of FIG. 5 according to another embodiment.
FIG. 8 illustrates a signal flow for transmitting resource allocation information of additional bits of DCI format 1A of FIG. 5.
FIG. 9 is a flowchart of transmitting a PDCCH in the determined DCI formats after determining the DCI formats of FIG. 4 and the DCI formats of FIG. 5.
10 is a flowchart of processing the PDCCHs of the DCI formats of FIG. 4 and the DCI formats of FIG. 5.
11 is a block diagram of a base station according to another embodiment for generating downlink control information.
12 is a block diagram of a terminal according to another embodiment.
13 is a block diagram schematically illustrating a wireless communication system in which an embodiment of the present invention is implemented.
FIG. 14 is a flowchart for transmitting a PDCCH in the determined DCI formats after determining the DCI formats of FIGS. 5D and 5E.
FIG. 15 is a flowchart of processing PDCCHs of DCI formats of FIGS. 5D and 5E.

Hereinafter, some embodiments of the present invention will be described in detail through 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 elements as much as possible even though they are shown in different drawings. In describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

1 illustrates a wireless communication system to which embodiments of the present invention 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 (BS). The terminal 10 and the base station 20 use the MU-MIMO channel information feedback method considering interference according to the additional UE connection described below, and the switching switching method between the SU-MIMO and the MU-MIMO using the same. The MU-MIMO channel information feedback method and a switching switching method between SU-MIMO and MU-MIMO using the same will be described in detail below with reference to FIG.

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.

A base station 20 or a cell generally refers to a fixed station communicating with the terminal 10 and includes a Node-B, an evolved Node-B, and a Base Transceiver. May be called other terms such as System, Access Point, Relay Node

In the present specification, the terminal 10 and the base station 20 are two transmitting and receiving entities used to implement the technology or the 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.

One embodiment of the present invention is applied to asynchronous wireless communication evolving into Long Term Evolution (LTE) and LTE-advanced through GSM, WCDMA, HSPA, and synchronous wireless communication evolving into CDMA, CDMA-2000 and UMB) Can be. 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, in an example of a wireless communication system to which an embodiment of the present invention is applied, one radio frame or radio frame includes 10 subframes, and one subframe includes two slots ( slot).

The basic unit of data transmission is a subframe unit, and downlink or uplink scheduling is performed on a subframe basis. One slot may include a plurality of OFDM symbols in the time domain and at least one subcarrier in the frequency domain, and one slot may include 7 or 6 OFDM symbols.

For example, if a subframe consists of two time slots, each time slot may include seven symbols in the time domain and twelve subcarriers or subcarriers in the frequency domain, such that time is defined as one slot. The frequency domain may be referred to as a resource block or a resource block (RB), but is not limited thereto.

On the other hand, the physical downlink control channel (PDCCH), which is one of control channels for transmitting control information, is divided into various DCI formats (Downlink Control Indication format, DCI format) and provides UE specific control information (UE specific). do. When transmitting UE-specific control information, the UE provides information for decoding a Physical Downlink Shared Channel (PDSCH) or a Physical Uplink Shared Channel (PUSCH) from the terminal's point of view and communicates with the UE at the same time. It also provides the necessary control information.

2 is a flowchart illustrating a configuration of a PDCCH according to another embodiment.

1 and 2, the base station 20 configures the PDCCH payload according to an information payload format to be sent to the terminal. The length of the PDCCH payload may vary depending on the information payload format. The information payload format may be a DCI format. For example, as described below, a resource indicator (RIV) may be expressed in a resource allocation field of DCI format 1A to configure DCI format 1A. Of course, other information payload formats may also be present in DCI formats.

In step S210, a cyclic redundancy check (CRC) for error detection is added to each PDCCH payload. The CRC is masked with an identifier (referred to as RNTI (Radio Network Temporary Identifier)) according to the owner or purpose of the PDCCH.

In operation S220, channel coding is performed on the control information added with the CRC to generate coded data. In step S230, rate matching is performed according to the CCE aggregation level allocated to the PDCCH format. In step S240, the coded data is modulated to generate modulation symbols. In step S250, modulation symbols are mapped to physical resource elements (CCE to RE mapping).

Generalizing the control information transmission method described with reference to FIG. 2 is as follows. The base station adds a cyclic redundancy check (CRC) for error detection to the control information including the resource allocation information and performs channel coding on the control information to which the CRC is added, thereby encoding coded data. It may be transmitted to the terminal by generating, modulating the encoded data to generate modulation symbols and mapping the modulation symbols to physical resource elements.

Meanwhile, precoding is omitted in the process of generating the PDCCH in the OFDM signal generation process, and thus the input and output of the precoding may be the same. In addition, the codeword may not be generated after multiple paths. Tailbiting convolutional coding (TCC) may be used to generate the PDCCH control channel, and an operation related to rate matching (RM) may be applied.

3 is a flowchart illustrating PDCCH processing.

1 and 3, in step S310, the terminal 10 demaps a physical resource element to a CCE.

In step S320, the UE 10 demodulates the CCE aggregation level that the payload corresponding to the reference DCI format can have according to its transmission mode because it does not know which CCE aggregation level it should receive the PDCCH. .

In step S330, the terminal 10 performs de-rate matching on the demodulated data according to the payload and the CCE aggregation level.

In operation S340, channel decoding is performed on the encoded data according to the code rate, and the CRC is checked to detect whether an error occurs. If no error occurs, the terminal 10 detects its own PDCCH. If an error occurs, the terminal 10 continuously performs blind decoding on another CCE aggregation level or another DCI format.

In operation S350, the terminal 10 having detected its own PDCCH removes the CRC from the decoded data to obtain control information necessary for the terminal 10.

For example, DCI format 0 is detected and the uplink scheduling downlink included in this DCI format 0 is interpreted. In this case, the DCI format 1A is detected and the downlink scheduling downlink included in the DCI format 1A calculates the RIV through decoding when expressing the resource indicator of the resource allocation field described later, and then calculates coefficients of the corresponding resource indicator. Can be interpreted

Other DCI formats are detected and the downlink scheduling assignments included in this control information, uplink scheduling grant, and power control commands are used to identify the corresponding CCs identified by the CC. It performs downlink scheduling assignment, uplink scheduling grant, and power control.

Generalizing the control information processing method described with reference to FIG. 3 is as follows.

The terminal demaps the physical resource element receiving the control information from the base station to the symbols (CCE to RE demapping), generating data by demodulating the demapped symbols, and performing channel decoding on the demodulated data. Checking the CRC to detect whether an error has occurred, removing the CRC from the decoded data, obtaining necessary control information, and interpreting resource allocation information from the obtained control information. have.

4 illustrates an example of a format of DCI format 0 and DCI format 1A among information payload formats of the PDCCH of FIG. 2. In this case, the formats of DCI format 0 and DCI format 1A are described as an example, but may be applied to the formats of any current or future DCI formats in the same manner.

By comparing the sizes of the DCI format 0 410 and the DCI format 1A 420, if the DCI format 1A 420 is large, the bits of zero values are set to fit the size of the DCI format 0 410 to the DCI format 1A 420. If the DCI format 0 410 is large, bits of zero value may be added to fit the size of the DCI format 1A 420 to the DCI format 0 410. This is because the DCI format 0 410 and the DCI format 1A 420 may vary in size depending on the system bandwidth.

In addition, the following restrictions are imposed on the size of the DCI format 1A 420. When the size of the DCI format 1A 420 (excluding the size of the CRC field) has one of the following values, one bit having a value of 0 is added to have another value.

At this time, the size of the information bits considered ambiguity may be {12, 14, 16, 20, 24, 26, 32, 40, 44, 56}.

When the system bandwidth is 5/10/15/20 MHz, the size of DCI format 0 / 1A is summarized as Table 1 [DCI format 0 / 1A.

5 MHz 10 MHz 15 MHz 20 MHz DCI format 0
(with CRC) 39 41 42 43 DCI format 0
(without CRC) 23 25 26 27 DCI format 1A
(with CRC) 40 42 43 44 DCI format 1A
(without CRC) 24 26 27 28 DCI format 1A
(without CRC, considering information bit size) 25 27 27 28 Final DCI format 0 / 1A
(without CRC) 25 27 27 28 Final DCI format 0 / 1A
(with CRC) 41 43 43 44

In the uplink grant of DCI format 0 (410), a division bit for distinguishing a continuous resource allocation method and a discontinuous resource allocation method is required, and a new bit is always used in the DCI format 0 (410). This excess bit is because DCI format 0 410 has the same PDCCH size as DCI format 1A 420. That is, in the blind decoding process, the DCI format 0 410 and the DCI format 1A 420 are treated in the same decoding process, and are blindly decoded assuming a certain size for each band. After the predetermined size is confirmed, a DCI format 0 (410) or a DCI format 1A (420) is distinguished through a division bit inside the PDCCH (a division bit for distinguishing DCI format 1A from DCI format 1A). As described above, DCI format 0 410 and DCI format 1A 420 are designed to have the same size, and considering the use of the internal fields of DCI format 0 410 and DCI format 1A 420, DCI format 1A ( Since 420 requires more than one bit more than DCI format 0 (410), in DCI format 0 (410), as shown in FIG.

FIG. 5 illustrates another example of formats of DCI format 0 and DCI format 1A among the information payload formats of the PDCCH of FIG. 2. In this case, the formats of DCI format 0 and DCI format 1A are described as an example, but may be applied to the formats of any current or future DCI formats in the same manner.

Referring to FIG. 5, in consideration of new additions as described below, two bits may be added as compared with the existing ones in DCI format 0. This bit addition of DCI format 0 means bit addition of DCI format 1A. Bits added to DCI format 1A only have a surplus bit as an overhead for DCI format 1A and deteriorate PDCCH reception performance.

In general, the larger the size of the PDCCH information payload, the worse the reception performance at the same aggregation level. The aggregation level has values of 1, 2, 4, and 8. At the aggregation levels of 2, 4, and 8, the transmission signal (PDCCH transmission signal) of aggregation level 1 is repeated twice, four times, and eight times. When the PDCCH reception performance does not satisfy the required reception performance, the reception performance is improved by increasing the aggregation level.

DCI format 1A is a channel for transmitting downlink control information. The resource allocation scheme is based on continuous resource allocation as in DCI format 0. DCI format 1 is a typical format for transmitting multiple clusters in downlink. DCI format 1 has a poor reception performance with respect to DCI format 1A and needs to relatively increase the aggregation level. As the aggregation level increases, the number of PDCCHs that can be transmitted in one subframe decreases as the PDCCH allocation region increases in the required control region. If the PDCCH is smaller, this means that the number of UEs that can be scheduled in the unit subframe is small.

In general, when the terminal is allocated resources up or down in the LTE system, the ratio of the total number of clusters of the terminal to which the number of clusters of allocated resources occupies decreases as the number of clusters required increases. That is, the number of terminals allocated to only one continuous cluster is the largest, followed by the number of terminals allocated to two discontinuous clusters, and there are almost no terminals allocated to a predetermined number, for example, four or more clusters.

Referring to FIG. 5A, the DCI format 0 510 includes two bits for the aperiodic SRS triggering field 512 and the aperiodic CSI triggering field 514 together with uplink resource allocation information (UL Grant 511). May be added. In this case, there may be a division bit 516 for distinguishing continuous / discontinuous allocation.

The uplink resource allocation information 511 includes resource allocation information used for transmission of uplink data. The aperiodic SRS triggering field 512 may include flag information or field information indicating aperiodic SRS triggering. The aperiodic CSI triggering field 514 may include flag information or field information indicating aperiodic CSI triggering. The division bit 516 for distinguishing the continuous / discontinuous allocation may be a surplus bit basically existing as shown in FIG.

When the aperiodic SRS triggering message / aperiodic CSI triggering message / continuous-discontinuous bit is included, the size of DCI format 0 / 1A is compared and summarized in Table 2.

5 MHz 10 MHz 15 MHz 20 MHz DCI format 0
(with CRC) 42 44 45 46 DCI format 0
(without CRC) 26 28 29 30 DCI format 0
(without CRC, considering information bit size) 27 28 29 30 DCI format 1A
(with CRC) 40 42 43 44 DCI format 1A
(without CRC) 24 26 27 28 DCI format 1A
(without CRC, considering information bit size) 25 27 27 28 Final DCI format 0 / 1A
(without CRC) 27 28 29 30 Final DCI format 0 / 1A
(with CRC) 43 44 45 46 Redundant bits in DCI format 1A 3 2 2 2

Hereinafter, the aperiodic SRS triggering field 512 of DCI format 0 510 of FIG. 5A will be described.

In a wireless communication system, the terminal transmits an uplink channel estimation reference signal, which is a type of reference signal, to the base station in order to deliver uplink channel information to the base station. Among these, an example of the channel estimation reference signal may include a sounding reference signal (SRS) used in Long Term Evolution (LTE) and LTE-Advanced, which is the same as a pilot channel for an uplink channel. Has the function. Meanwhile, the SRS may be transmitted in the last symbol of each subframe, but is not limited thereto.

In a multi-component carrier environment, one component carrier (CC) to which the terminal initially establishes a connection (Connection or RRC connection) among various component carriers (CC) is called a primary CC. The CCs allocated to the UE are called secondary CCs, in addition to the PCC, which is initially connected to the UE (Connection or RRC Connection) among various CCs.

The base station may determine whether to transmit the aperiodic SRS using the parameters received from the terminal and the base station parameters in order to determine the period / aperiodic transmission of the SRS for the CC. At this time, according to the aperiodic transmission decision, a higher layer message (RRC signaling) indicating whether to apply the aperiodic SRS may be transmitted to the terminal to inform the terminal of the use of the aperiodic SRS scheme.

FIG. 6 illustrates a signal flow for transmitting an aperiodic SRS through an uplink component carrier additionally configured using the aperiodic SRS triggering message of FIG. 5 according to another embodiment.

First, the base station transmits a message whether the application to the terminal (S600). In this case, the applicability message may include only information indicating to the UE whether to use the aperiodic SRS scheme, and the resource allocation of any one of the aforementioned aperiodic CSI application and / or continuous resource allocation or discontinuous resource allocation scheme. It may also include information indicating whether the method is used. This applicability message may be a higher layer message, for example, but not limited to, an RRC signal or signaling.

After the message message step S600, the base station generates and transmits an aperiodic SRS triggering message to the terminal (S620).

The aperiodic SRS triggering message may be transmitted through a downlink (DL) component carrier having a linkage (linkage) relationship with the corresponding uplink component carrier, and may be cross CC scheduling or cross carrier. In the case of a terminal having scheduling enabled, a carrier index field (CIF) may be inserted and transmitted as one of downlink component carriers regardless of connection establishment.

When the aperiodic SRS triggering message is transmitted through the PDCCH of the L1 layer, DCI format 0 and DCI format 4 may be used as a transmission format of the PDCCH (downlink physical control channel). When DCI format 0 is used as the aperiodic SRS triggering message, the aperiodic SRS triggering field 512 of DCI format 0 510 of FIG. 5A may be used. That is, the base station generates and transmits an aperiodic SRS triggering field 512 of DCI format 0 510 of FIG. 5 as an aperiodic SRS triggering message.

Aperiodic SRS Triggering Bit Information One Aperiodic SRS request 0 Not aperiodic SRS request

Meanwhile, configuration parameters for aperiodic SRS transmission may be transmitted to the terminal as an RRC signal.

Next, when the terminal receives the aperiodic SRS triggering message, the terminal transmits the aperiodic SRS (S630).

Next, when the base station completes the reception of the aperiodic SRS, the base station acquires uplink channel information based on the received aperiodic SRS. The base station generates scheduling information for the additionally configured uplink SCC based on the obtained channel information. The base station transmits the generated scheduling information to the terminal using an uplink grant.

Next, the terminal may transmit data through the uplink component carrier further configured based on the received uplink scheduling information (UL grant information).

Hereinafter, the aperiodic CSI triggering field 514 of DCI format 0 510 of FIG. 5A will be described.

FIG. 7 illustrates a signal flow for transmitting an aperiodic CSI using the aperiodic CSI triggering message of FIG. 5 according to another embodiment.

Referring to FIG. 7, the base station transmits an application availability message to the terminal (S700). In this case, the applicability message may include only information indicating to the UE whether to use the aperiodic CSI scheme, and the resource allocation of any of the aperiodic CSI application and / or continuous resource allocation or discontinuous resource allocation scheme described above or below. It may also include information indicating whether the method is used. This applicability message may be a higher layer message, for example, but not limited to, an RRC signal or signaling.

After step S700, the base station generates and transmits an aperiodic CSI triggering message to the terminal (S710).

The aperiodic CSI triggering message may be transmitted through a downlink (DL) component carrier connected to a corresponding uplink component carrier, and the terminal having cross CC scheduling or cross carrier scheduling enabled. In this case, a carrier index field (CIF) may be inserted and transmitted as one of downlink (DL) component carriers regardless of connection establishment.

When the aperiodic CSI triggering message is transmitted through the PDCCH of the L1 layer, DCI format 0 may be used as a transmission format of a PDCCH (downlink physical control channel). When DCI format 0 is used as the aperiodic CSI triggering message, the aperiodic CSI triggering field 514 of DCI format 0 510 of FIG. 5 may be used. That is, the base station generates and transmits the aperiodic CSI triggering field 514 of DCI format 0 510 of FIG. 5 as an aperiodic CSI triggering message to the UE.

In the case of aperiodic CSI triggering, unlike in the case of aperiodic SRS triggering, there is one bit field for CSI triggering on the existing Rel-8 / 9 DCI format 0. In Rel-10, an aperiodic CSI triggering field 514 may be configured by combining two bits with one additional bit and an existing bit, but the present invention is not limited thereto.

This can be shown in Table 4. "00" indicates a case in which an aperiodic CSI is not requested, and all other cases indicate an aperiodic CSI request. "01" indicates that the downlink component carrier, which is received by the UE and whose CSI information is to be measured, is determined by the SIB-2 connection configuration together with the aperiodic CSI request. SIB-2 linkage (SIB-2 linkage) refers to a pair relationship or linkage relationship between a downlink component carrier and an uplink component carrier known to the UE by SIB-2 information in system information. &Quot; 10 " and " 11 " indicate that the downlink component carrier, which is received by the terminal with the aperiodic CSI request and whose CSI information is to be measured, is already determined (by previous transmission) by the RRC.

In the present specification, the CQI triggering or CQI request means a message for which the base station requests a type of CSI to the terminal.

Aperiodic CSI Triggering Bit Information 11 Determination of Downlink Component Carrier for which CSI Information is Obtained by RRC 10 Determination of Downlink Component Carrier for which CSI Information is Obtained by RRC 01 Determination of Downlink Component Carrier for Which CSI Information is Obtained by SIB-2 Linkage 00 Not aperiodic CSI request

The various Channel Status Indications (CSIs) transmitted in the uplink are channel quality indicator (CQI), precoding matrix indicator (PMI), rank indicator (RI), signal to noise ratio (SNR) and frame error rate (FER), delta channel quality. It may include one or more of the indicator (delta CQI).

When the terminal receives the aperiodic CSI triggering message of the base station, the terminal performs the aperiodic CSI reporting (S720). In this case, the aperiodic CSI reporting may be scheduled on the PUSCH configured with the DL-SCH or only the CSI, but is not limited thereto. For example, the aperiodic CSI reporting is triggered by an uplink grant, e.g., the aperiodic CSI triggering field 514 of DCI format 0 510 of FIG. 5A, to which the PUSCH phase is mapped Uplink Control Indication) may be carried on one uplink component carrier indicated by an uplink grant including aperiodic CSI triggering.

The base station transmits data to the terminal using periodic CSI reporting with aperiodic CSI reporting.

Referring back to FIG. 5 and Table 2, DCI format 1A when DCI format 0 is large when DCI format 0 510 is added with two bits for aperiodic SRS triggering field 512 and aperiodic CSI triggering field 514. According to the rule of adding bits according to the size of DCI format 0, DCI format 1A 520 may also have 2 bits added. In other words, when DCI format 0 510 adds two bits for the aperiodic SRS triggering 512 and the aperiodic CSI triggering 514, the DCI format 1A 520 may always generate more than two bits.

Referring to FIG. 5B, the DCI format 1A 510 includes a continuous / discontinuous division field 522 and a part 424 of the downlink resource allocation field 521 together with the downlink resource allocation information 521. can do.

The downlink resource allocation information 521 includes resource allocation information used for transmission of downlink data. The continuous / discontinuous division field 522 includes whether downlink resource allocation is continuous or discontinuous. Part 424 of the resource allocation field 521 may be used as part of the resource allocation field in the case of discontinuous resource allocation in combination with the existing resource allocation field.

 In more detail, a resource region for resource allocation may be configured in units of time frequency of a resource block (RB). In case of a wideband, the resource block has a large number of resource blocks, and thus a bit requirement for indicating resource allocation information. Because of the increase, several resource blocks can be combined and processed into a resource block group (RBG). Resource allocation information represented by such a resource block or resource block group may be transmitted in the form of Resource Indication Value (RIV) in a Resource Allocation Field in the PDCCH. The bandwidth considered in LTE is 1.4 / 3/5/10/15/20 MHz, which is 6/15/25/50/75/100 when expressed as the number of resource blocks. The size of the resource block group represented by the resource block corresponding to each band is 1/2/2/3/4/4. Therefore, the number of resource block groups corresponding to each band is 6/8/13/17/19/25.

There may be various types of resource allocation methods (type 0, type 1 and type 2) according to a method of expressing how resources are allocated to the resource allocation field mentioned above.

Among the various types of resource allocation methods, type 0 represents a resource allocation area in the form of a bitmap. That is, resource allocation for all resource blocks or each resource block group may be represented by 1 and non-resource allocation by 0.

Another resource allocation method, type 1, is a method of representing a resource allocation area in a periodic form. That is, it shows resource allocation in the form of having a period of constant value P and distributed at regular intervals in the entire allocation area. In general, when type 0 and type 1 are used together, a division bit for distinguishing type 0 and type 1 may be added.

Another resource allocation method, type 2, is used for allocating resource regions having a constant length in succession using offsets and lengths.

)로 구성되어 있을 수 있다. In another type of resource allocation, type 2, the resource allocation field of consecutive resource allocation is defined by the starting resource block (RB _start ) of the resource block group and the length of terms of virtually contiguously allocated resource blocks. Resource indication value corresponding to L _CRB s) RIV _LTE (L _CRBs , RB _start ,

It can be composed of).

)는 다음과 같이 표현될 수 있다.At this time, RIV _LTE (L _CRBs , RB _start ,

) Can be expressed as

[Equation 1]

는 내림 연산을 의미하는 것으로서,

내의 숫자보다 같거나 작은 정수 중 가장 큰 수를 나타낸다.

는 가상의 연결된 자원블록그룹의 최대길이를 나타낸다.

는 전체자원블록그룹의 개수를 나타내는 값으로 n에 해당한다. "DL"의 의미는 하향링크를 의미하지만 하향링크만으로 한정되는 것은아니다.here

Means a rounding operation,

Represents the largest of integers less than or equal to the number in.

Denotes the maximum length of a virtual connected resource block group.

Is a value representing the total number of resource block groups and corresponds to n. "DL" means downlink but is not limited to downlink only.

) =15(3-1)+5=35가 된다. For example, if RB _start = 5 of the resource block group and the length of consecutive virtual resource blocks L _CRBs = 3 in 15 total resource block groups, RIV _LTE (L _CRBs , RB _start ,

) = 15 (3-1) + 5 = 35.

3GPP LTE Rel-8 / 9 applies only a type 2 resource allocation method for uplink. In the 3GPP LTE-A Rel-10, uplink resource allocation by a plurality of discontinuous resource blocks has been added while the type 2 format represents only resource allocation represented by one contiguous block.

This resource allocation is called non-contiguous resource allocation, and each set of blocks among a set of a plurality of discrete blocks is defined as a cluster. Type 0 may also represent discontinuous resource allocation, but the discontinuous resource allocation considered in LTE-A allows a limited number, while the resource allocation considered for type 0 enables all possible discontinuous allocations over the full scope of a given resource block group. Consider only two clusters of.

As described above, the continuous / discontinuous division field 522 of DCI format 1A of FIG. 5B may distinguish whether downlink resource allocation is continuous or discontinuous as shown in Table 5 below.

Continuous / Discontinuous Separation Bits Information One Non-contiguous resource allocation 0 Contiguous resource allocation

Encoding / decoding of RIV for discontinuous resource allocation using such a limited number of clusters uses enumerative source coding or CQI based algorithm. Enumeration source coding is already included as a way to represent the Channel Quality Indicator (CQI), which has the advantages of complexity reduction and implementation stability in terms of ease of standardization and expansion of the already implemented system. . In the channel quality indicator, cumulative source coding is performed in units of frequencies called subbands, and represents a method of expressing a predetermined number (M) of subbands within a given subband region (1 to N). Enumerated source coding can be represented as:

, 1≤s_k≤N, s_k< s_k+1 에 대해서 다음과 같은 값을 계산할 수 있다.N subband indexes sorted in ascending size

, For _{1≤s k ≤N, s k <s} k + 1 , we can calculate the following values:

&Quot; (2) &quot;

이고,

의 범위를 갖는다. here,

ego,

Has a range of.

에 대해 스케쥴된 단말에 각각 크기 P의 하나 이상의 연속된 자원블럭그룹을 포함하는 자원블럭들의 두개의 세트들을 지시한다. In summary, resource allocation information for uplink resource allocation type 2 is in the uplink system band.

Indicate two sets of resource blocks, each containing one or more contiguous resource block groups of size P, to the terminal scheduled for.

에 대한수학식

로 주어진다. At this time, the resource allocation field for the scheduled uplink grant corresponds to the start RBG index s ₀ and the end RGB index s ₁ -1 of resource block set 1, the start RBG index s ₂ and the end RGB index s ₃ -1 of resource block set 2, respectively. It consists of a combinatorial index r. Where the combinatorial index r is equal to M = 4

Mathematical formula for

.

On the other hand, if the corresponding end RBG index is equal to the start RBG index, only one RGB has been allocated to one set for the start RBG index.

Specifically, it is already included as a method of representing a channel quality indicator (CQI), and when a resource block set or cluster is represented using enumerative source coding in the same way as a standardized method, a resource block set or cluster May not represent RB or RBG equal to 1; This is because the S _k of the CQI basic algorithm indicating the channel quality indicator (CQI) is a condition that the same value cannot be entered. Thus, the _k + 1 to S _{+ 1} corresponding to the end point in S _k in order to solve this problem.

)로 치환되어야 하기 때문에 실제 공식에 대입한 조합 인덱스(combinatorial index) r=_15+1-5C₄+_15+1-8C₃+_15+1-10C₂+_15+1-13C_{1 =11}C₄+₈C₃+₆C₂+₃C₁=407이 된다. For example, in all 15 resource block groups, the start point s ₀ = 5, the end point s ₀ -1 = 7 of the first cluster, and the start point s ₂ = 10, the end point s ₀ -1 = 12 of the second cluster. In this case, s ₁ -1 = 7 becomes s ₁ = 7 + 1 = 8 so that the parameter corresponding to the end point becomes +1. Thus, s _1-1 represents the end point of the originally intended cluster. Where N N + 1 (

Combinatorial index r = _{15 + 1-5} C ₄ + _{15 + 1-8} C ₃ + _{15 + 1-10} C ₂ + _{15 + 1-13} C _{1 = 11} C ₄ + ₈ C ₃ + ₆ C ₂ + ₃ C ₁ = 407

The enumerated source decoding process for the above can be expressed as follows.

&Quot; (3) &quot;

In the case of discontinuous resource allocation considered in the uplink, the resource allocation field 523 may consider up to two clusters and use enumerated source encoding. In more detail, the bit requirement amount required for discontinuous resource allocation for two clusters as compared with the continuous resource allocation may require only one bit more than the bit requirement amount (13 bits in total) for the aforementioned continuous resource allocation.

In other words, when represented by a maximum of 25 resource block groups for 100 resource blocks in the 20 MHz band, 14 bits may represent two clusters having full degrees of freedom.

Accordingly, the resource allocation field 523 may represent a discontinuous resource allocation having two clusters with a total of 14 bits by adding 1 bit 524 newly added to a resource allocation field (13 bits in total) used for continuous resource allocation.

 In this way, even in DCI format 1A, up to two clusters of discontinuous resource allocation can be expressed, so that the number of UEs having an aggregation level of 1 required by the PDCCH DCI format 1A for transmitting downlink control information is increased from the total number of UEs, and a certain subframe is used. The number of UEs that can be scheduled during the period may increase.

FIG. 8 illustrates a signal flow for transmitting resource allocation information of additional bits of DCI format 1A of FIG. 5.

Referring to FIG. 8, the base station determines whether to continuously allocate downlink resources to specific terminals, whether to allocate resources discontinuously, and to which resource block groups.

According to the determination, the base station indicates whether the downlink resource is allocated continuously or discontinuously in the continuous / discontinuous division field 522 and indicates the RIV value for continuous or discontinuous resource allocation in the resource allocation field 523. The PDCCH is transmitted to the terminal (S810). In step S810, the base station transmits the PDCCH to the terminal through the processes described with reference to FIG.

=35로 표시한 나타낸 DCI 포맷1A의 PDCCH를 단말에 전송할 수도 있다.For example, as shown in FIG. 5, the continuous / discontinuous allocation field 522 is represented by 1, and the RIV value of the discontinuous resource allocation field is a terminal of the PDCCH of DCI format 1A indicated by a combination index r = 407. Can be sent to. Meanwhile, as shown in FIG. 5, the continuous / discontinuous division field 522 is marked as 0, and the RIV value of the resource allocation field is

The PDCCH of the DCI format 1A indicated by = 35 may be transmitted to the UE.

The terminal receives the PDCCH of DCI format 1A transmitted from the base station. After receiving the PDCCH, the UE may decode DCI format 1A of the PDCCH through blind decoding according to the size of the DCI.

The process of receiving and decoding the PDCCH by the UE is performed through the processes described with reference to FIG. 3.

Thereafter, the UE checks the continuous / discontinuous division field 522 of DCI format 1A of the PDCCH to determine whether resources are allocated continuously or discontinuously, and decodes the RIV value of the continuous / discontinuous allocation allocation field 523 according to a decoding algorithm. You can check the resource block groups assigned to you.

For example, the UE can confirm that the continuous / discontinuous division field 522 of DCI format 1A is indicated by 1 and the RIV value of the discontinuous resource allocation field is indicated by a combination index r = 407. According to the discontinuous resource allocation decoding algorithm represented by Equation 3, the UE has a start point s ₀ = 5 of the first cluster, an end point s ₁ -1 = 7, and a start point of the second cluster s ₂ = 10, in 15 total resource block groups. You can see the discrete resource allocation at endpoint s ₀ -1 = 12.

The base station transmits downlink data by allocating a resource in a manner notified to the terminal by the DCI format 1A (S820). When the terminal receives a signal from the base station, the terminal may obtain data from resource block groups allocated to the terminal itself.

FIG. 9 is a flowchart of transmitting a PDCCH in the determined DCI formats after determining the DCI formats of FIG. 4 and the DCI formats of FIG. 5.

4, 5, and 9, it is determined whether to trigger the aperiodic SRS and the aperiodic CSI in the base station or the upper layer (S910). In addition, it is possible to decide whether to configure a mode in which non-continuous resource allocation is added to the continuous resource allocation. In other words, the addition of bits for adding non-continuous resource allocation in addition to aperiodic SRS triggering, aperiodic CSI reporting, and continuous allocation is determined by higher layer signaling. The addition of these bits can be done independently for each item or can be determined together.

If it is determined in step S910 to trigger the non-periodic SRS and the non-periodic CSI, and decide to allocate the non-contiguous resource allocation in addition to the continuous resource allocation as shown in Figure 5 (A) uplink resource allocation information The uplink grant is transmitted to the DCI format 0 510 including the aperiodic SRS triggering field 512 and the aperiodic CSI triggering field 514.

In other words, one bit is added to DCI format 0 to perform aperiodic SRS triggering depending on whether the bit value is 0/1. In addition, one bit is added to DCI format 0 to perform aperiodic CSI triggering depending on whether the bit value is 0/1.

In addition, when the base station transmits the resource allocation information to the terminal, as shown in FIG. 5B, the base station / continuous division field 522 and the downlink resource allocation field 521 together with the downlink resource allocation information 521. A DCI format 1A 520 including a part 424 of the data is configured (S920).

In other words, one bit is added to DCI format 1A to indicate whether the resource allocation is continuous or discontinuous according to 0/1 of this bit value. Express resource allocation up to

On the other hand, if it is determined in step S910 not to trigger the aperiodic SRS and the aperiodic CSI, as shown in (A) of FIG. 4, the uplink grant is assigned to DCI format 0 410 including only uplink resource allocation information 511. send.

In addition, when transmitting the resource allocation information to the terminal, the base station configures DCI format 1A 420 including only downlink resource allocation information as shown in FIG. 4B (S930).

The base station transmits the downlink grant selectively configured in step S920 or step S930 to the terminal (S940).

In this case, steps S920 to S940 may be the same as the method of transmitting the PDCCH described with reference to FIGS. 2 and 8.

10 is a flowchart of processing the PDCCHs of the DCI formats of FIG. 4 and the DCI formats of FIG. 5.

4, 5, and 10, the UE decodes the downlink grant through blind decoding after receiving the downlink grant through the PDCCH (S1010).

Next, it is determined whether the upper layer triggers the aperiodic SRS and the aperiodic CSI (may be added whether to add the noncontinuous resource allocation to the continuous resource allocation) (S1020).

If it is determined in step S1020 to trigger the aperiodic SRS and the aperiodic CSI (may be added whether to add the non-contiguous resource allocation for the continuous resource allocation) as shown in (A) of FIG. The uplink grant is interpreted as a DCI format 0 510 including an aperiodic SRS triggering field 512 and an aperiodic CSI triggering field 514 together with the allocation information 511 (S1030).

Meanwhile, if it is determined in step S1020 that the non-periodic SRS and the non-periodic CSI are not triggered (it may be added whether or not to add the non-continuous resource allocation to the continuous resource allocation), as shown in (B) of FIG. 4. The downlink grant is interpreted as the DCI format 1A 420 including only the resource allocation information 521 (S1040).

In this case, steps S1010, S1030, and S1040 may be the same as the processing method of the PDCCH described with reference to FIGS. 3 and 8.

Hereinafter, the continuous / discontinuous resource allocation of the DCI format 1A 530 of FIGS. 5C to 5E will be described. Except for configuring the DCI format 1A 530, the method of configuring or processing the PDCCH is the same as described above.

Referring to FIG. 5C, the DCI format 1A 530 of FIG. 5 includes downlink resource allocation information 531 as a continuous / discontinuous division field 532 and a downlink resource allocation field 533. It may be the same as DCI format 1A 520 of (B). Meanwhile, the DCI format 1A 530 may include localized / distributed VRB assignment flags 524 and 535.

Local / distribution allocation flags 524 and 535 may indicate or represent certain types of virtual resource blocks, eg, two types. Local / distribution allocation flags 524 and 535 may use a particular number of bits, for example one bit.

For example, two types of virtual resource blocks are the local type of virtual resource blocks of localized type (hereinafter referred to as 'local type') and the distributed type of virtual resource blocks. of distributed type, hereinafter referred to as 'distributed type'.

Resource blocks may include physical resource blocks and virtual resource blocks. Physical resource blocks may be defined by a certain number of consecutive symbols in the time domain and a certain number of consecutive subcarriers in the frequency domain. Meanwhile, among the aforementioned two types of virtual resource blocks, the virtual resource blocks of the local type correspond to the physical resource blocks. The local type means a resource block structure of the same concept as the above described physical resource block.

On the other hand, the virtual resource blocks of the distribution type refers to a resource block structure in which resource blocks are distributed apart by a specific gap value. In other words, the distribution type refers to a form in which virtual resource blocks of a new order are formed by mixing the order of physical resource blocks. Therefore, 1,2,3,... Of resource block numbers in the distribution type. The increase in form has a distributed form that is mixed with the entire resource block from the actual physical resource block. In the virtual resource block configuration of the distribution type, when continuous virtual resource blocks are configured to a specific receiver or a terminal by contiguous resource allocation, the actual physical channel is distributed over the entire band so that diversity gain, for example, frequency Diversity gain can be obtained.

Local / distribution allocation flags 524 and 535 may represent or represent two types of virtual resource blocks, for example, in one bit.

On the other hand, the discontinuous resource configuration may not need the diversity gain obtained in the distribution type because the resource allocation is not limited to a specific band and can selectively configure the resource in the entire band. In other words, since diversity gain is obtained by discontinuous resource configuration, there may be no gain obtained by the virtual resource allocation of the distribution type or no gain of the virtual resource allocation of the distribution type.

Therefore, discontinuous resource configuration or discontinuous resource allocation may not constitute a virtual resource block of a distribution type. Thus, in discontinuous resource configuration or discontinuous resource allocation, local / distribution allocation flags 524 and 535 may not need to be used to indicate or represent two types of virtual resource blocks. In other words, local / distribution allocation flags 524 and 535 may be used for other purposes in discontinuous resource allocation.

For example, referring to FIG. 5D, the continuous / discontinuous division field 532 is indicated by “1” 532 (a) as shown in Table 5, and downlink of DCI format 1A 530 when discontinuous resource allocation is performed. The resource allocation field 533 and the local / distribution allocation flags 524 and 535 may be used for the discontinuous resource allocation 536. In other words, the resource allocation field 533 used for 13-bit consecutive resource allocation and the 1-bit local / distribution allocation flags 524 and 535 can represent a discontinuous resource allocation 536 having two clusters with a total of 14 bits. have.

Meanwhile, referring to FIG. 5E, the continuous / discontinuous division field 532 is indicated by “0” 532 (b) as shown in Table 5 so that downlink resources of the DCI format 1A 530 when continuous resource allocation is performed. The allocation field 533 and the local / distribution allocation flags 524 and 535 may represent two types of continuous resource allocation and virtual resource blocks, respectively.

FIG. 14 is a flowchart for transmitting a PDCCH in the determined DCI formats after determining the DCI formats of FIGS. 5D and 5E.

Referring to FIGS. 5D and 5E and 14, it is determined whether continuous resource allocation is performed at the base station or higher layer (S1400). At this time, before or after step S1400, as shown in step S910 of FIG. 9, the base station or a higher layer may determine whether to trigger the aperiodic SRS and the aperiodic CSI.

If it is determined in step S1410 to allocate continuous resources, as shown in (E) of FIG. 5, continuous resource allocation is indicated as "0" in the continuous / discontinuous division field of DCI format 1A (530), and the downlink resource allocation field and the like. Each type of local / distribution allocation flag is used to represent two types of continuous resource allocation and virtual resource blocks, respectively (S1412).

After step S1412, DCI format 1A 530 of FIG. 5E is formed by expressing corresponding information in the continuous / discontinuous division field, the downlink resource allocation field, the local / distribution allocation flag, and other fields (S1420). ).

If it is determined in step S1410 that discontinuous resource allocation, as shown in FIG. 5D, the downlink resource allocation field of the DCI format 1A 530 and the local / distribution allocation flag are combined to express the discontinuous resource allocation ( S1414).

After the step S1414, DCI format 1A of FIG. 5 (D) expressing discontinuous resource allocation by expressing corresponding information in the continuous / discontinuous division field and other fields and combining the downlink resource allocation field and the local / distribution allocation flag. 530 is configured (S1430).

The base station transmits the downlink grant selectively configured in step S1420 or S1430 to the terminal (S1440).

In this case, steps S1420 to S1440 may be the same as the method of transmitting the PDCCH described with reference to FIGS. 2 and 8.

FIG. 15 is a flowchart of processing PDCCHs of DCI formats of FIGS. 5D and 5E.

Referring to FIGS. 5D, 15E, and 15, the UE decodes the downlink grant through blind decoding after receiving the downlink grant through the PDCCH (S1510).

Next, it is determined whether continuous resource allocation is performed by analyzing the continuous / discontinuous division fields of the downlink grant (S1520). In other words, if the 1-bit value of the continuous / discontinuous division field of the downlink grant is "0", it can be determined as continuous resource allocation, and if it is "1", it can be determined as discontinuous resource allocation.

If it is determined in step S1520 that the continuous resource allocation, the resource allocation field and the local / distribution allocation flag in the DCI format 1A of FIG. 5E are interpreted (S1530). In other words, as determined to be continuous resource allocation in step S1530, the continuous resource allocation information is interpreted in the resource allocation field of DCI format 1A of FIG. 5E, and the local type and distribution type of the virtual resource block in the local / distribution allocation flag. One of them can be interpreted.

On the other hand, if it is determined in step S1520 that the discontinuous resource allocation, the resource allocation field and the local / distribution allocation flag in the DCI format 1A of FIG. 5D is interpreted (S1530). In other words, as determined to be discontinuous resource allocation in step S1530, the discontinuous resource allocation information may be analyzed by combining the resource allocation field of the DCI format 1A and the local / distribution allocation flag of FIG. 5D.

11 is a block diagram of a base station according to another embodiment for generating downlink control information.

1 and 11, in the signal generator 1190, a codeword generator 1105, a scrambling unit 1110 and 1119, a modulation mapper 1120 and 1129, and a layer mapper The layer mapper 1130, the precoding unit 1140, the resource element mappers 1150 and 1159, and the OFDM signal generators 1160 and 1169 may exist as separate modules, and two or more may be combined. It can work as a module.

The control information in which the cyclic redundancy check (CRC) is added to the control information described above is input to the signal generator 990.

The control information to which the CRC is added includes a codeword generator 1105, a scrambling unit 1110 and 1119, a modulation mapper 1120 and 929, a layer mapper 1130, and a precoding unit. 1140, the RE elements 1150 and 1159, and the OFDM signal generators 1160 and 1169 are generated as OFDM signals and transmitted to the terminal through an antenna.

In the process of generating the PDCCH in the OFDM signal generation process of FIG. 11, precoding is omitted, and thus the input and output of the precoding may be the same. In addition, the codeword may not be generated after multiple paths. Tailbiting convolutional coding (TCC) may be used to generate the PDCCH control channel, and an operation related to rate matching (RM) may be applied.

12 is a block diagram of a terminal according to another embodiment.

1 and 12, a terminal receives a signal from a base station through an antenna.

The demodulation unit 1220 provides a function of demodulating the received signal. When the base station transmits an OFDM signal, demodulation is performed by the OFDM scheme. In addition, the base station may demodulate according to the corresponding scheme according to whether the signal generated by the base station is the FDD scheme or the TDD scheme.

The demodulated signal is descrambled by the descrambling unit 1230 to generate a codeword of a predetermined length, and the codeword decoding unit 1240 restores the codeword back to predetermined control information. This function may be performed at the signal decoder 1290 at once, or may operate independently or sequentially in two or more modules.

Finally, the control information is analyzed from the restored information in the upper layer than the physical layer in which the signal is restored.

13 is a block diagram schematically illustrating a wireless communication system in which an embodiment of the present invention is implemented.

The base station 1310 includes a signal processor 1311, a memory 1312, and an RF unit 1313.

The signal processor 1311 implements a function, a process, and / or a method necessary for processing the above-described control information.

The memory 1312 may be connected to the signal processor 1311 to store a protocol or parameter for processing control information and a transmission table for resource allocation.

The RF unit 1313 may be connected to the signal processor 1311 to transmit and / or receive a radio signal and include a plurality of antennas.

The terminal 1320 includes a signal processor 1321, a memory 1322, and an RF unit 1323.

The signal processor 1321 implements a function, a process, and / or a method necessary for processing the above-described control information.

The memory 1322 may be connected to the signal processor 1321 to store a protocol or parameter for processing control information and a signal transmission table identical to that held by the base station 1310 for resource allocation.

The RF unit 1323 may be connected to the signal processor 1321 to transmit and / or receive a radio signal and include a plurality of antennas.

The signal processors 1311 and 1321 may include an application-specific integrated circuit (ASIC), another chipset, a logic circuit, and / or a data processing device.

The memories 1312 and 1322 may include read-only memory (ROM), random access memory (RAM), flash memory, memory cards, storage media and / or other storage devices. The RF units 1313 and 1323 may include a baseband circuit for processing a radio signal. When the embodiment is implemented in software, the above-described technique may be implemented as a module (process, function, etc.) for performing the above-described function. The module may be stored in the memories 1312 and 1322 and executed by the signal processors 1311 and 1321. The memories 1312 and 1322 may be inside or outside the signal processors 1311 and 1321, and may be connected to the processors 1311 and 1321 by various well-known means.

Control information transmitted from the upper layer described in the present invention may be transmitted in a separate physical control channel, and may be updated periodically or aperiodically at the request of a base station or a terminal or according to a predetermined rule or indication. .

In the exemplary system described above, the methods are described based on a flowchart as a series of steps or blocks, but the present invention is not limited to the order of steps, and certain steps may occur in different order or simultaneously with other steps as described above. Can be. In addition, those skilled in the art will appreciate that the steps shown in the flowcharts are not exclusive and that other steps may be included or one or more steps in the flowcharts may be deleted without affecting the scope of the present invention.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention but to describe 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 interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

Claims (16)

Generating, by the base station, control information in a DCI format, the base station further comprising a bit indicating one of continuous resource allocation or discontinuous resource allocation and a bit further configuring a part of the resource allocation field; And
And transmitting control information of the DCI format to a terminal through a specific channel. The method of claim 1,
And the DCI format is DCI format 1A. The method of claim 2,
The DCI format 1A has the same size as the included DCI format O to which an aperiodic SRS triggering bit and an aperiodic SRS triggering bit are added. The method of claim 3,
A resource allocation field that contains the added bits, the discrete resource at the time of combination index (combinatorial index) set of discontinuous resource block group, r have been represented, continuously starting point at the time of resource block groups to resource (RB _start) and a continuous Resource indication values corresponding to the length of the virtual resource blocks L _CRBs ( _{LIV LTE} (L _CRBs , RB _start ,

Control information transmission method characterized in that represented by)). Receiving control information from a base station in a physical downlink control channel in a DCI format by a terminal in a communication system, the control information further comprising a bit indicating whether continuous / discontinuous resource allocation and a bit additionally configuring a portion of a resource allocation field;
And analyzing the control information of the DCI format. The method of claim 5,
And the DCI format is DCI format 1A. The method of claim 6,
And the DCI format 1A has the same size as the included DCI format O to which an aperiodic SRS triggering bit and an aperiodic SRS triggering bit are added. The method of claim 7, wherein
A resource allocation field that contains the added bits, the discrete resource at the time of combination index (combinatorial index) set of discontinuous resource block group, r have been represented, continuously starting point at the time of resource block groups to resource (RB _start) and a continuous Resource indication values corresponding to the length of the virtual resource blocks L _CRBs ( _{LIV LTE} (L _CRBs , RB _start ,

Control information processing method characterized in that expressed by)). As a base station for transmitting control information to a terminal in a communication system,
Added a bit that additionally constitutes a portion of the resource allocation field and a bit that indicates one of the same size as the contiguous resource allocation or discontinuous resource allocation with the added DCI format O with the aperiodic SRS triggering bit and the aperiodic SRS triggering bit added. And a signal encoding unit for generating control information including a DCI format and transmitting the control information of the DCI format to a terminal through a physical downlink control channel. 10. The method of claim 9,
A resource allocation field that contains the added bits, the discrete resource at the time of combination index (combinatorial index) set of discontinuous resource block group, r have been represented, continuously starting point at the time of resource block groups to resource (RB _start) and a continuous Resource indication values corresponding to the length of the virtual resource blocks L _CRBs ( _{LIV LTE} (L _CRBs , RB _start ,

A base station characterized by being represented by)). A terminal for receiving and processing control information from a base station in a communication system,
Added a bit that additionally constitutes a portion of the resource allocation field and a bit that indicates one of the same size as the included DCI format O with the aperiodic SRS triggering bit and the aperiodic SRS triggering bit added. And a signal decoding unit for receiving control information from the base station in a physical downlink control channel in a DCI format and interpreting the control information in the DCI format. The method of claim 11,
A resource allocation field that contains the added bits, the discrete resource at the time of combination index (combinatorial index) set of discontinuous resource block group, r have been represented, continuously starting point at the time of resource block groups to resource (RB _start) and a continuous Resource indication values corresponding to the length of the virtual resource blocks L _CRBs ( _{LIV LTE} (L _CRBs , RB _start ,

Terminal comprising a signal decoding unit characterized in that is represented by)). In a communication system, a base station includes a bit indicating one of continuous resource allocation or discontinuous resource allocation, a local / distribution allocation flag indicating a type of a virtual resource block, a resource allocation field indicating a resource allocation, and the local / distribution allocation flag. Combining the resource allocation field with the resource allocation field to generate control information indicative of discontinuous resource allocation in a DCI format; And
And transmitting control information of the DCI format to a terminal through a specific channel. In a communication system, a base station includes a bit indicating one of continuous resource allocation or discontinuous resource allocation, a local / distribution allocation flag indicating a type of a virtual resource block, a resource allocation field indicating a resource allocation, and the local / distribution allocation flag. And combining the resource allocation field to receive control information indicating discontinuous resource allocation from a base station in a physical downlink control channel in a DCI format;
And analyzing the control information of the DCI format. As a base station for transmitting control information to a terminal in a communication system,
The base station includes a bit indicating either a continuous resource allocation or a discontinuous resource allocation, a local / distribution allocation flag indicating a type of a virtual resource block, a resource allocation field indicating a resource allocation, and the local / distribution allocation flag and the resource. And a signal encoding unit for combining control fields to generate control information indicating discontinuous resource allocation in a DCI format and transmitting the control information of the DCI format to a terminal through a physical downlink control channel. A terminal for receiving and processing control information from a base station in a communication system,
The local / distribution allocation flag and the resource allocation field include a bit indicating one of continuous resource allocation or discontinuous resource allocation, a local / distribution allocation flag indicating a type of virtual resource block, and a resource allocation field indicating a resource allocation. And a signal decoding unit for receiving the control information indicating the discontinuous resource allocation from the base station in the physical downlink control channel in the DCI format and interpreting the control information in the DCI format.

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