WO2011099724A2 - Method and device for sending and receiving instruction information in carrier aggregation - Google Patents

Abstract

Disclosed are a method and device for both sending and receiving instruction information in carrier aggregation. According to one embodiment of the present invention, in order to send instruction information in carrier aggregation, rules information is sent to a user terminal from a device using two or more component carrier waves, instruction information is generated which sets the range of the component carrier band in accordance with the rules information, and a component carrier is sent which contains the instruction information.

Description

Method and apparatus for transmitting and receiving indication information in carrier aggregation

Provided are a method and apparatus for transmitting and receiving control format indicator (CFI) information in carrier aggregation. More specifically, the present invention relates to a method and apparatus for setting and transmitting a control format indicator according to a network condition and decoding the received control format indicator.

When transmitting and receiving data on the carrier, the transmitting and receiving sides share control information or transmit and receive control information to enable accurate data transmission and reception. Control information that requires accurate transmission and reception includes information on what resource is allocated to which region (radio frequency or time domain), response information on the accuracy of the transmitted and received information, and modulation (modulation) method of data to be transmitted and received. Information to inform you. Such information must be shared with the transmitting and receiving side so that the transmitting and receiving side can transmit and receive information without error.

Therefore, the control information has a characteristic to be transmitted and received very accurately between the transmitting and receiving sides, and in various wireless communication systems, the process of lowering the modulation order or sending the same information repeatedly for accurate transmission and reception of control information have. However, when using a plurality of component carriers, the situation of the network to be considered is diversified, it is necessary to take the process of transmitting and receiving control information in consideration of this.

Efficient transmission of control information is possible in a wireless communication network environment operating a plurality of component carriers. Even if an error occurs in the received control information, the error can be healed to improve the stability of the transmission. Since the safety of transmission reduces the reduction of data transmission efficiency due to retransmission, accurate transmission of control information can improve the efficiency of the entire system.

In order to achieve the above object, the method for transmitting the indication information in the carrier aggregation according to an embodiment of the present invention comprises the steps of transmitting the rule information to the user terminal through the upper layer signaling in the apparatus using two or more component carriers Generating indication information for setting a range of the region of the CC from the rule information, and transmitting the CC including the indication information.

In addition, the method for receiving indication information in the carrier aggregation according to another embodiment of the present invention comprises the steps of receiving rule information from the base station through the upper layer signaling in the user terminal using two or more component carriers, receiving the component carrier The method may include extracting indication information from the CC using the rule information, and decoding data of the CC according to the indication.

In addition, the apparatus for transmitting indication information in the carrier aggregation according to another embodiment of the present invention is a rule information generation unit for generating rule information in a device using two or more component carriers, the region of the component carrier region in the rule information An instruction information generator for generating indication information for setting a range, a signal generator for generating a component carrier including the indication information generated by the instruction information generator as a signal, and a transmitter for transmitting the generated signal, The rule information may be transmitted through higher layer signaling.

In addition, the apparatus for receiving indication information in the carrier aggregation according to another embodiment of the present invention, in the user terminal using two or more component carriers, a receiver for receiving rule information and component carriers from the base station, and extracts the rule information A rule information storage unit for storing, an instruction information extracting unit for extracting indication information from the CC using the rule information, and a decoding unit for decoding the data of the CC according to the indication information; Characterized in that it is transmitted through higher layer signaling.

1 is a diagram illustrating a case where an error occurs in the transmission of control information in a plurality of CCs.

2 is a diagram illustrating a case in which a value of a specific component carrier cannot be set in setting a value of a CFI when receiving a PDCCH indication from a plurality of component carriers.

3 is a diagram illustrating a case in which a value of a specific component carrier cannot be set in setting a value of a CFI when a plurality of component carriers receive a PDCCH indication from each other.

4 is a diagram illustrating a process of setting control information and transmitting control information to a user terminal in a device such as a base station or an eNB according to an embodiment of the present invention.

FIG. 5 is a diagram illustrating a process in which a user terminal receives control information set in a device such as a base station or an eNB according to an embodiment of the present invention and interprets the control information.

6 is a diagram illustrating a configuration of an apparatus for setting control information and transmitting control information to a user terminal according to an embodiment of the present invention.

7 is a diagram illustrating a configuration of an apparatus for receiving control information set according to an embodiment of the present invention and interpreting the control information.

8 is a diagram illustrating a configuration of calculating a set value of control information when rule information is configured as a function according to an embodiment of the present invention.

9 is a diagram illustrating a process of extracting CFI information from a CFI subset according to an embodiment of the present invention.

10 is a diagram illustrating an example of converting a value of control information of a CC according to an embodiment of the present invention.

Hereinafter, some embodiments will be described in detail with reference to the accompanying 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 addition, in describing the embodiments of the present specification, when it is determined that the detailed description of the related well-known configuration or function may obscure the subject matter of the present specification, the detailed description thereof will be omitted.

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

The wireless communication system includes a user equipment (UE) and a base station (BS).

The terminal in the present specification is a generic concept meaning a user terminal in wireless communication, and in GSM as well as user equipment (UE) in WCDMA and Long Term Evolution (LTE), LTE-Advanced (LTE-A), HSPA, etc. It should be interpreted as a concept that includes the MS (Mobile Station), UT (User Terminal), SS (Subscriber Station), wireless device (wireless device).

In the present specification, the terminal and the base station are used in a comprehensive sense as two transmitting and receiving entities used to implement the technology or technical idea described in the present specification, and are not limited by the terms or words specifically referred to.

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.

The uplink transmission and the downlink transmission may use a time division duplex (TDD) scheme that is transmitted using different times, or may use a frequency division duplex (FDD) scheme that is transmitted using different frequencies.

One embodiment of the present specification may be applied to resource allocation such as asynchronous wireless communication evolving to LTE and LTE-advanced through GSM, WCDMA, HSPA, and synchronous wireless communication evolving to CDMA, CDMA-2000 and UMB. The embodiments presented in this specification should not be construed as being limited or limited to a specific wireless communication field, but should be interpreted as including all technical fields to which the technical spirit of the present specification may be applied.

In the present specification, in order to distinguish a plurality of component carriers (hereinafter referred to as 'CC'), it may be indicated as CC and may be indicated as CC0 and CC1. However, the numbers included in these component carriers do not coincide with the order of the component carriers or the positions of the frequency bands of the component carriers.

The Physical Downlink Control Channel (PDCCH) of the LTE control channel configuration informs the UE of resource allocation information determined by the eNB in a downlink or uplink channel for each subframe. Such scheduling information indicated by the PDCCH in the carrier aggregation may transmit control information not only for control information (for example, resource allocation and communication scheme) in the carrier to which the PDCCH belongs, but also for resources of other carriers. This is called cross-carrier scheduling.

1 is a diagram illustrating a case where an error occurs in the transmission of control information in a plurality of CCs. 1 illustrates a structure in which data can be transmitted using two component carriers. In one embodiment of a network configuration using multiple component carriers, in 3GPP Long Tern Evolution-Advanced (LTE-A), a single carrier standard in LTE is based on a combination of several bands having a band smaller than 20 MHz. The composition is presented. On the other hand, the discussion of the component carrier band having a band of 20MHz or more. In LTE-A, the discussion of multicarrier aggregation is basically made in consideration of backward compatibility based on the LTE standard. 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.

FIG. 1 shows a situation in which control information instructions are generated by intercarrier scheduling for CC2 102 from carrier CC1 101. When the control information indicated by the Physical Control Format Indicator CHannel (PCFICH) and the PDCCH is performed in one carrier (PDCCH 112 in CC1), the error rate of the PCFICH tends to be lower than that of the PDCCH. Therefore, in the same carrier, control information is incorrectly caused by an error of PCFICH and rarely causes an error of PDSCH (Physical Downlink Shared CHannel). However, this characteristic does not hold when scheduling between carriers is performed. In FIG. 1, when the channel condition of CC2 102 is worse than the channel condition of CC1 101, when the error of PCFICH 120 of CC2 102 occurs seriously, this is directly assigned by PDCCH of CC1 101. An error also occurs for the PDSCH 126 of the CC2 102. The error of the PCFICH 120 may occur even though there is no error in the PDCCH 114 of the CC1 101, and the error of the PDSCH 126 caused by the error may be caused by a hybrid automatic repeat request (HARQ) in the CC2 102. It creates a situation and induces retransmissions, resulting in additional resource waste. That is, it causes HARQ buffer corruption.

In order to solve the problem of FIG. 1, a control format indicator (CFI) of a carrier to which control information is transmitted by intercarrier scheduling (hereinafter, referred to as CFI) and scheduling between carriers It is possible to consider a scheme in which the carrier having the indicated physical data control channel (PDCCH) and the control format indicator have the same value. That is, in FIG. 1, a method of setting the value of the CFI of the CC2 102 to the CFI value of the CC1 101 may be considered. However, a problem may occur when a plurality of component carriers indicate a plurality of component carriers. A method in which a control type indicator of a carrier provided with control information by intercarrier scheduling and a carrier having a physical data control channel (PDCCH) indicating scheduling between carriers and a control type indicator have the same value is shown in FIGS. 2 and 3. For the situation, it is necessary to decide which component carrier's carrier indicator value to select.

2 is a diagram illustrating a case in which a value of a specific component carrier cannot be set in setting a value of a CFI when receiving a PDCCH indication from a plurality of component carriers. In FIG. 2, there are two CCs 200 and CC2 202 that allocate resources to CC1 201 by inter-carrier scheduling. In this case, as described above, in order to set the CFI value of the CC to which the resource is allocated to the CFI (CFI ₁ ) value of CC1, it is necessary to select from CFI ₀ and CFI ₂ .

3 is a diagram illustrating a case in which a value of a specific component carrier cannot be set in setting a value of a CFI when a plurality of component carriers receive a PDCCH indication from each other. In FIG. 3, the CFI (CFI ₁ ) value of the CC1 301 is set, but instructions are given from the CC0 300 and the CC2 302, and the CC0 301 and the CC2 302 are also designated by the CC1 301. indicated and according to the CFI (CFI ₂₎ the value of CC1 (301) of the CFI (CFI ₁₎ a CFI (CFI ₀₎ value of the value CC0 (300) is also difficult determine CC2 (302) also occurs define difficult.

In order to solve the problem of FIGS. 1, 2, and 3, the present specification will be described with respect to a process of setting control information such as a control format indicator for a plurality of component carriers in which intercarrier scheduling is performed, and a configuration of an apparatus implementing the same.

Hereinafter, the control format indicator will be described as an embodiment of the indication information. However, the embodiments herein are not limited to the control type indicator, and embodiments of the present specification may be applied to information to be used in a wireless communication system having a configuration or function similar to that of the control type indicator.

Briefly, the control format indicators use a total of two bits to convey information. The value of the control format indicator may vary depending on the communication system to be implemented. As described above, the value of CFI, which is a control format indicator transmitted in the PCFICH, is 1 to 3 when the number of resource block groups (RBGs) of the entire band of downlink is greater than 10. If less than or equal to 10 may have a value of 2 to 4.

The control format indicator converts 2-bit information into a 32-bit codeword. Examples of the conversion are shown in Table 1. This is because the conversion to the codeword increases the hamming distance between the pieces of information of the control format indicator, thereby reducing the possibility of error.

Table 1 Codeword Mapping of Control Type Indicators

The control format indicator is included in the PCFICH channel and transmitted to a user terminal from a device such as a base station or an eNB. The control format indicator has a value of 1 to 3 or 2 to 4. However, since the range of the value of the control format indicator depends on the number of downlink resource allocation blocks because it is expressed as 2 bits of information, in this specification, a value of 0 to 2 is considered in consideration of mathematical convenience based on 2 bits. I will explain. In order to implement an embodiment of the present specification, a value of 0 to 2 of 2 bits may add 1 when the number of resource blocks of the entire band of downlink is greater than 10, If less than or equal to 10, 2 may be added to have the value of CFI. Of course, it may be set to have a value of 1 to 3 or 2 to 4 according to a predetermined protocol of the base station and the terminal.

4 is a diagram illustrating a process of setting control information and transmitting control information to a user terminal in a device such as a base station or an eNB according to an embodiment of the present invention. An embodiment of the control information will be described based on the indication information. One embodiment of the indication information includes information on the range of the control region occupied by the control information in the CC. In addition, another embodiment of the indication information includes information on the range of the area occupied by the data information in the CC. In this specification, the indication information means control information, and the name of the indication information is used to more clearly indicate what information the control information includes. The indication information may be composed of one parameter or one value, or may be composed of a value of a matrix or a function having two or more values.

The base station transmits the rule information to the user terminal (S410). The base station may predetermine which rule to generate the indication information before transmitting the rule information. Transmission of the rule information may proceed through signaling of a higher layer. That is, when information on a rule is generated as data in the RRC (Radio Resource Control) area and transmitted as data for controlling radio by the base station, the user terminal decodes the received data and then, when the corresponding data is rule information, The information can be saved. In addition, the transmission of the rule information may be made at predetermined intervals. The information on the rule transmitted through the RRC signaling, that is, the higher layer means information indicating directly or indirectly a value of indication information such as CFI included in the PCFICH.

When sharing rule information with a user terminal, the base station generates indication information according to the corresponding rule. The instruction information may be generated at any one of steps S431 to S435, which may vary depending on what information is included in the rule information (S420).

If the rule information has a predetermined fixed value, the value of the indication information is set to a fixed value included in the rule information (S433). The predetermined fixed value means setting to any one value within various ranges that the indication information may have. For example, when the indication information is the same as the CFI of FIGS. 2 and 3, it means that the indication information is set to a specific value such as 1 from among the values 1 to 3 and 2 to 4 that the CFI may have. This includes the rule information directly indicating a value that the CFI may have. This can be usefully applied when the indication information of a specific component carrier is not available in FIGS. 2 and 3 or when the indication information is determined once.

On the other hand, if the rule information includes information related to the function, the instruction information may be generated through a function operation (S433). This includes indirectly instructing rule information which values the CFI may have. The indication information through a function means that when resources are allocated from a plurality of CCs as shown in FIG. 2, the indication information is generated by performing a function operation using the indication information of another CC as a function input parameter. The rule information includes information about which function to use. One embodiment of the function may be a function that allows a specific representative value to be selected from input values such as a maximum value, a minimum value, or an average value and a maximum frequency value. An embodiment in which the rule information is a function will be described with reference to FIG. 8.

On the other hand, if the rule information includes the subset information, it is possible to select the most appropriate element in the subset and generate this as indication information (S435). The subset means a set including all or some elements (elements of the set) among the elements constituting the pre-calculated set. Information for selecting such subset may be included in the rule information. The rule information is thus composed of a subset (by random selection or mathematical derivation), permutation (selected according to channel conditions and user requirements described below), and selection of elements (combination of indicator information) in the subset. Method (selection of the nearest combination or combination with the closest value that is greater than or equal to the initial indication information of each carrier), the composition of the carriers that make up the entire combination (indicates which carriers are included in these combinations) ) May be included. Such rule information may be transmitted by higher layer signaling.

An example of a full set is: When the range of values that the indication information can have is 0 to (L-1), and there are N component carriers in total, the range of the entire set is as follows.

Table 2 Examples of the Complete Set

Table 2 is a set of all the indication information that N CCs can have. The index of the aggregation element is indication information assigned to the N component carriers and is an index indicating a specific element in the aggregation. For example, when the index is 2, the indication information of the first CC is 2, and the indication information of the second, third, ..., N-th CC is set to 0.

The subset is obtained by extracting a part from the set in Table 2, as shown in Table 3. The case of using only three component carriers out of N component carriers is shown.

Table 3 Examples of Subsets

A subset was created by selecting five elements from the full set shown in Table 3. In operation S435, an element including the same or similar value may be selected in comparison to the initial indication information set at the beginning of each component carrier in the subset.

For this selection, initial indication information of each component carrier is required. The initial indication information means an initial value that satisfies a specific requirement that can be set in the corresponding CC before setting the indication information. In an embodiment of the indication information, when the information on the range of the control region occupied by the control information in the component carrier includes, the initial indication information may be estimated or calculated by the control region in the component carrier. This has the same meaning as the indication information indicating the control area by being independently assigned to each carrier considered in the original carrier set. In addition, when another embodiment of the indication information includes information on the range of the area occupied by the data information in the CC, the initial information may be expected or calculated to be occupied by the data information in the CC. have. Accordingly, in Table 3, when the initial indication information of the first, second, and three component carriers is 2, 2, and 1, it is most similar to the set index 2. Therefore, the indication information actually generated is 2, 1 for the first, 2, and 3 component carriers. Generated with a value of 1 or 1. Of course, since the value of this subset is logical indication information, if this information is actually generated as indication information, a number of specific reference values such as 1 or 2 may be added.

Meanwhile, the rule information may include information in which indication information that the first and second component carriers have in the subset is exchanged, which is assigned as indication information of the first component carrier in Table 3. This means that the value allocated to the value and the indication information of the second component carrier can be used interchangeably. Since it is a subset, the number of cases of all the indication information of the component carrier cannot be represented, so that setting values within the subset can be exchanged to be more similar. This will be described in more detail with reference to FIG. 10.

If the initial indication information is (2, 2, 1), but the indication information actually generated is (2, 1, 1), the indication information of the second CC may have a smaller value. Therefore, in this case, separate intercarrier scheduling can be performed. The generation of the subset and the part of selecting and setting the indication information from the subset will be described again with reference to FIGS. 9 to 12.

The indication information is generated in S431, S433, and S435 to determine whether the carrier schedule is necessary according to the characteristic of the indication information (S438). If the indication information is information for setting a control area or an area to include data information, and is set to be allocated less than the area to be originally allocated, intercarrier scheduling is performed so that control information or data information of the reduced area is transmitted through another CC. It may be (S440). There is no need to perform intercarrier scheduling, or when the intercarrier scheduling is completed, the component carrier including the generated indication information is transmitted to the user terminal (S450). Optionally, the control information region of the CC may be allocated according to the indication information. Transmitting the component carrier means transmitting information including the component carrier using a specific frequency band. Hereinafter, in the present specification, the transmission of the component carriers means that the information is included in the component carriers of a specific frequency band and transmitted as described above. The CC transmission can be generated by a radio signal and transmitted.

As an example of the indication information in FIG. 4, it may be information on a CFI, and may also be indication information on a region where a PDSCH is set.

FIG. 5 is a diagram illustrating a process in which a user terminal receives control information set in a device such as a base station, that is, an eNB, according to an embodiment of the present invention, and interprets the control information. As described above, in order to clarify the characteristics of the control information, it will be described under the name of the indication information. Parts overlapping with FIG. 4 will be replaced with the description of FIG. 4.

The user terminal receives rule information from the base station (S510). The base station may predetermine which rule to generate the indication information before transmitting the rule information. Receipt of rule information may proceed through signaling of a higher layer. That is, when the base station generates data about the rule as data in the RRC region and transmits the data as radio control data, the user terminal may decode the received data and store the corresponding information when the data is rule information. . In addition, the reception of the rule information may be made at predetermined intervals. The information on the rule transmitted through the RRC signaling, that is, the upper layer, refers to information indicating a value of indication information such as PCFICH directly or indirectly.

The user terminal receives the rule information and shares it with the base station, and then receives the CC (S514). The indication information included in the received component carrier is decoded. When the rule information is used, the indication information can be reliably extracted by using joint decoding. This process may extract the indication information at any one of steps S531 to S535, which may vary depending on what information is included in the rule information (S520).

When the rule information has a predetermined fixed value, the value of the indication information is extracted as a fixed value included in the rule information (S533). The predetermined fixed value means a case where the predetermined value is set to any one value through rule information within various ranges of the indication information. For example, when the indication information is the same as the CFI of FIGS. 2 and 3, it means that the information is set to a specific value such as 1 from among the values 1 to 3 and 2 to 4 that the CFI may have. This can be usefully applied when the indication information of a specific component carrier is not available in FIGS. 2 and 3 or when the indication information is determined once.

Meanwhile, when the rule information includes information related to a function, the indication information may be extracted through a function operation (S533). The indication information through a function means that when resources are allocated from a plurality of CCs as shown in FIG. 2, the indication information is extracted by performing a function operation using the indication information of another CC as a function input parameter. The rule information includes information about which function to use. One embodiment of the function may be a function that allows a representative value to be selected from input values such as a maximum value, a minimum value, or an average value and a maximum frequency value. An embodiment in which the rule information is a function will be described with reference to FIG. 8.

In addition, when the rule information includes the subset information, the most suitable element in the subset may be selected and extracted as the indication information (S535). Subset means a set including all or only some elements (elements of the set) in a pre-calculated set. An example of a full set is: When the range of values that the indication information can have is 0 to (L-1), and the total number of component carriers is N, embodiments of the entire set are as shown in Table 2 above. same. I will replace it with the above description.

The user terminal extracts the indication information using the rule information, and decodes the component carrier data according to the indication information (S540).

When an error occurs in the indication information, the indication information can be newly extracted by using the rule information already shared with the base station by the process of FIG. 5. Joint decoding may be performed by using indication information of a component carrier other than the component carrier in which an error occurs. For example, the CFI of the PCFICH is assumed as an example of the indication information. An error occurred in the indication information of the decoded CC carrier CC1 using CC0, CC1, CC2 CC carriers. Meanwhile, indication information of CCs of CC0 and CC2 was received without error. In this case, if the rule information is a specific fixed value, the fixed value can be extracted as the indication information of CC1. If the fixed value is used as the same fixed value for all component carriers, the indication information may be extracted using the indication information of another component carrier. When the rule information is a function, the result of the function may be extracted as the indication information of CC1 by using the indication information of CC0 and CC2 as the input value of the function. On the other hand, when the rule information is a subset, the value set as the indication information of the CC1 in the same or similar elements to the value of the indication information of CC0, CC2 can be extracted as the indication information.

Since the error information may be newly extracted based on the rule information and the indication information of the other component carriers, the possibility of error correction of the indication information of the user terminal may be increased and the performance of the network may be improved.

The rule information described with reference to FIGS. 4 and 5 may be transmitted and received between the eNB and the UE through RRC signaling, that is, higher layer signaling. In this case, the transmitted and received rule information means information indicating a value of indication information such as PCFICH directly or indirectly. Direct indication means that the value of the PCFICH is transmitted and received through the RRC signaling, and indirect indication means that information that can calculate the value of the PCFICH is transmitted and received through the RRC signaling.

6 is a diagram illustrating a configuration of an apparatus for setting control information and transmitting control information to a user terminal according to an embodiment of the present invention.

6 shows a configuration of a device such as an eNB and a base station. The rule information generator 601, the intercarrier scheduling unit 602, the instruction information generator 603, and a signal generator 690 and a transmitter 695 for generating a radio signal. Each of these modules may be configured to function as a separate module, and may be combined to function as one or more modules.

The rule information generation unit 601 generates rule information. As described above, the rule information is information related to fixed values, functions, and subsets. Based on the generated rule information, the indication information generation unit 603 generates indication information for setting a range of the region of the CC. The signal generator 690 allocates a control information region of the component carrier according to the instruction information generated by the instruction information generator 603 and generates a component carrier including the control information region as a signal. The generated signal, that is, the component carrier, is transmitted by the transmitter 695. The intercarrier scheduling unit 602 may perform intercarrier scheduling between CCs when the indication information generated by the indication information generator 603 needs scheduling between CCs.

When the rule information includes information for setting to a predetermined fixed value, the instruction information generation unit 603 sets the value of the instruction information to a value included in the rule information. When the rule information is information about a function for calculating a result from two or more input values, the indication information generator 603 inputs the indication information of the second component carrier which allocates resources to the component carriers. To create.

Similarly, when the rule information is the content of the subset, the indication information of all or some component carriers may be set together, wherein the component carrier consists of the first component carrier and the second component carrier, and the rule information includes the first, When the second component carrier includes information necessary for generating a subset of the set of indication information that the second component carrier may have, the indication information generator 603 may include the first indication information of the first and second component carriers in the subset. An element identical or similar to the first indication information and the second indication information is selected and set as the indication information. In addition, as described above, in order to increase the diversity of the subset, the rule information may include information for exchanging indication information of the first component carrier and the second component carrier. The generated indication information is generated and transmitted as a predetermined signal by the signal generator 690.

Looking at the configuration of the signal generator 690 in detail.

The value generated by the instruction information generator 603 is converted into a predetermined code word by the code word generator 605. In this process, other control information may also be generated as a code word in the codeword generator 605.

If the indication information uses the CFI as an example, the CFI is included as a PCFICH in each CC. Therefore, the code word of the CFI is included in the CC. This CFI is an embodiment of the indication information generated by the indication information generation unit 603 according to predetermined rule information.

The codeword generator 605 generates a codeword, and the generated information is scrambled by the scrambling units 610,..., 619. The blocks of scrambled bits are modulated into symbols according to a modulation mapper 620, ..., 629. Modulation may be BPSK, QPSK, and the like. When the indication information generated according to an embodiment of the present invention is CFI and is included in the PCFICH and transmitted, modulation may be performed by QPSK.

Modulated symbols are mapped to multiple layers in a layer mapper 630. In this process, when transmitting through one antenna port, a single layer is mapped and transmitted. On the other hand, when transmitting through multiple antenna ports, a multi-antenna transmission scheme may be used. Layer mapping may be performed by applying a multi-antenna transmission scheme such as spatial multiplexing or transmit diversity. .

When the layer mapping is completed, the precoding unit 640 generates a vector block to be mapped to a resource according to the mapping method of the antenna port. The precoding scheme may be determined according to the number of antennas determined in the layer mapping and the mapping method in the multiple antennas.

When the precoding is completed, the resource element mapping is performed in the RE element mapper 650,... 659. In this case, when the indication information generated by the indication information generation unit 603 is information indicating a range of an area in which the control information is included in the CC or the area in which the data is included, the RE mappers 650,. The region in which data is included may be mapped in accordance with the indication information. When the mapping is completed, the OFDM generated through the OFDM signal generators 660,..., 669 is transmitted through the antenna port of the transmitter 1195.

Meanwhile, the rule information generated by the rule information generator 601 may be transmitted through higher layer signaling. The information may be transmitted through an area for transmitting data such as PDSCH. That is, the rule information generation unit 601 generates a rule in consideration of the number of UEs, requirements for each UE (data requirements, QoS, etc.), channel situation, network condition, etc. RRC signaling) is performed. This higher layer (RRC signaling) may be transmitted in a physical channel format (eg, a data channel such as PDSCH). The rule information transmitted to the upper layer through the RRC signaling, that is, the information refers to information indicating the value of the indication information such as PCFICH directly or indirectly.

The signal generation process of FIG. 6 may be included in one module. As shown in FIG. 6, a codeword generator 605, a scrambling unit 610, ..., 619, a modulation mapper 620, ..., in the signal generator 690. 629), a layer mapper 630, a precoding unit 640, a resource element mapper 650, ..., 659, an OFDM signal generator 660, ..., 669 ) May exist as separate modules, and two or more may be combined to operate as a module.

7 is a diagram illustrating a configuration of an apparatus for receiving control information set according to an embodiment of the present invention and interpreting the control information.

7 is an embodiment illustrating a configuration of a user terminal such as a UE.

The overall configuration may include a receiver 710, a signal decoder 790, a control information extractor 770, a rule information store 750, and an indication information extractor 760.

The receiver 710 receives a signal from a base station. There may be one antenna in the receiver and may provide a multi-antenna reception function using two or more antennas. In addition, the received signal may include two or more CCs.

The demodulation unit 720 provides a function for demodulating the received signal. According to an embodiment of the present invention, when the base station transmits an OFDM signal, the base station performs demodulation by the OFDM scheme. In addition, the base station performs demodulation according to the corresponding scheme according to whether the signal generated by the base station is an FDD scheme or a TDD scheme. Can be.

The demodulated signal is descrambled by the descrambling unit 730 to generate a codeword having a predetermined length, and the codeword decoding unit 740 restores the codeword back to predetermined information. This function may be performed at a time by the signal decoder 790 or may operate independently or sequentially in two or more modules.

Control information is extracted from the decoded signal. The data decoder 780 decodes predetermined data from the extracted control information. Meanwhile, rule information transmitted through higher layer signaling may also be received and decoded in the form of a physical channel. Rule information generated from the field is extracted, and the rule is stored in the rule information storage unit 750. This may use the rule information of the rule information storage unit 750 to extract the instruction information from the instruction information extractor 780 later. As described above, the rule information transmitted through higher layer signaling may be received through an area of the PDSCH. The rule information storage unit 750 allows the instruction information extraction unit 760 to extract the instruction information through the joint decoding in the codeword decoding unit 740.

Thereafter, the signal received by the receiver 710 is decoded by the signal decoder 790, and the control information extractor 770 extracts control information. In addition, the instruction information extracting unit 760 extracts instruction information. Control information extraction of the control information extraction unit 770 and instruction information extraction of the indication information extraction unit 760 may be performed with a time difference. An error occurs in the instruction information during the instruction information extraction process of the instruction information extracting unit 760, so that the rule information of the rule information storage unit 750 is used to remove the error of the instruction information. For example, when the fixed information has a fixed value, the indication information may be extracted using the fixed value, and in the case of the function, the indication information may be extracted by using the indication information of another CC as an input value of the function. Details thereof have been described with reference to FIG. 5.

In addition, when the rule information is information related to a predetermined subset, the indication information extracting unit selects an element having the same or most similar indication information from the rule information and indication information of other component carriers in which no error occurs and extracts the indication information as indication information. can do.

The indication information may include information related to the allocation of the control information region of the CC. In an embodiment, when the indication information is CFI and an error occurs in the PCFICH, the user terminal may restore the value of the CFI using the rule information. When the CFI is newly extracted, the data region PDSCH can be decoded. In addition, when the instruction information sets the boundary of the data area, data can be decoded according to the boundary. The indication information may selectively allocate a boundary where a data area may be included or a boundary where a control area may be included.

Each module of FIG. 7 may be configured as one module or may be configured as a separate module.

The rule information described with reference to FIGS. 6 and 7 may be transmitted and received between the eNB and the UE through RRC signaling, that is, higher layer signaling. In this case, the transmitted and received rule information means information indicating a value of indication information such as PCFICH directly or indirectly. Directly indicating means that the value of the PCFICH is transmitted and received through the RRC signaling, and indirectly indicates that information that can calculate the value of the PCFICH is transmitted and received through the RRC signaling.

8 is a diagram illustrating a configuration of calculating a set value of control information when rule information is configured as a function according to an embodiment of the present invention. FIG. 8 is a diagram illustrating a process of setting control information of component carriers receiving resource allocation by scheduling between carriers from a plurality of component carriers as shown in FIG. 2. 8 illustrates a process of setting a CFI value, which is a control format indicator, as an embodiment of the control information.

In a wireless communication system including a total of N component carriers, component carriers for allocating resources to other component carriers by scheduling between carriers, that is, component carriers indicating resource allocation, for example, CC _y1 , CC _y2 , CC _yM (M <N), which is referred to as CC0 200 and CC2 202 of FIG. 2. The CFI values of the CCs indicating these resource allocations are called CFI _y1 , CFI _y2 , ..., CFI _yM . A component carrier allocated resources by these component carriers, for example, a component carrier such as CC1 201 of FIG. 2 is referred to as CC _x , and a CFI value of CC _x is referred to as CFI _x . In the case of FIG. 2, in this case, a function may be applied as in Equation 1 to set the CFI _x value of the component carrier CC _x .

[Equation 1]

CFI _x = f (CFI _y1 , CFI _y2 , ..., CFI _yM )

In FIG. 8, the function operator 810 receives CFI values of a plurality of CCs and calculates a value CFI _x of control format indicator information, which is one of control information to be allocated to CCx through a predetermined operation.

As an example of a function used in the function calculator 810, various functions such as a maximum value, a minimum value, an average value, and a maximum frequency value may be applied. The function implemented by such a function calculating unit includes [Equation 2].

[Formula 2]

For each function, Max is the maximum value, Min is the minimum value, Ave is the average value, and MostFreq is the most frequent value (the highest frequency value) among the CFI values of component carriers for allocating resource information. . Among them, Ave may be an integer function that performs rounding, rounding, rounding, etc., as shown in Equation 3, since the result may not be an integer.

[Equation 3]

As described above, CFI _y1 , CFI _y2 , ..., CFI _yM and CFI _x values may be calculated as 0 to 2 according to 2 bits, and 1 or 2 may be added according to the wireless communication system. Alternatively, it is possible to determine in advance whether to use 1 to 3 or 2 to 4 in the wireless communication system, and use the input value of the function operator 810 and the value calculated for the corresponding value. Accordingly, CFI correction units 812 and 814 are selected to select whether a process of adding 1 or 2 is required or not. The CFI correction unit may be selectively implemented, and may be included in the function calculation unit 810.

When the value of the CFI value CFIx calculated by the function operator 810 is increased, the resource allocation range of the control region is increased, thereby reducing the efficiency of the resource but guaranteeing the control region resource region required by the actual CCx. On the other hand, the smaller the CFI value (CFIx), the smaller the range of resource allocation of the control region, resulting in better resource efficiency, but it is difficult to meet the resource requirements of the control region originally required by CCx. For example, if the value of the CFI, which should be originally assigned to CCx, is 2, and the result of the calculation by the function operator 810 is 1, resource allocation of the control region may not be smooth. Therefore, in order to determine which function is to be used to calculate the CFI value in the function calculation unit 810, the efficiency of resource allocation and the network situation may be considered. In this case, the function may be fixed by being semi-static for a certain period of time. Such information may be changed or fixed by signaling of a higher layer such as RRC. If the CFIx determined through the process of FIG. 8 is smaller than the CFI value for the resource allocation of the actual control channel required by the CCx, this means that the control channel cannot be allocated to the CCx sufficiently, so that CC _y1 , CC _y2 , ... In addition, CC _yM may further perform _intercarrier scheduling. The rule information transmitted to the upper layer through the RRC signaling, that is, the information refers to information indicating the value of the indication information such as PCFICH directly or indirectly.

9 is a diagram illustrating a process of extracting CFI information from a CFI subset according to an embodiment of the present invention.

FIG. 8 is configured by performing a function operation using CFI values of other CCs indicating resource allocation of CCs as a predetermined value through a predetermined function calculator. 9 is a diagram illustrating a process of calculating CFI values of respective CCs in a predetermined set.

9 shows a process of selecting the most suitable CFI value from the set of CFI values that each CC can have and setting the CFI value of each CC. To this end, in FIG. 9, a set of CFI values may be obtained in advance and stored in a table form.

9 is a method applicable to both FIGS. 2 and 3. For convenience of explanation, the bit and the number calculated therein are to be matched as they are. Accordingly, in order to explain the operation of FIG. 9, 2 bits may be matched as shown in Table 3 below.

Table 4

Of course, in the process of generating a combination, the CFI value may be generated by adding 1 or 2 in advance, and such a function may be implemented through a module such as a CFI correction unit as shown in FIG. 8.

Looking at the overall flow of Figure 9 as follows.

The CFI combination set generation unit 920 generates all combinations of CFI values that each component carrier can have. For example, if there are N component carriers and the CFI value has L kinds of values (0 to L-1), the number of combinations of CFIs that the N component carriers can have is L ^N. The current CFI can have three values, so L can be three. Accordingly, the CFI combination set generation unit 920 may generate L ^N combinations. If the generated combination is used as it is, the CFI allocated to each component carrier has complete degrees of freedom, and each component carrier can configure a PCFICH in all ranges of the CFI. In this case, since there is no correlation between PCFICHs between CCs, decoding is performed independently and is not affected by decoding of other CCs. Therefore, even if an error occurs in the decoding process of a specific component carrier, it is difficult to correct it.

However, if a predetermined subset is selected from among L ^N combinations to have an association between component carriers, and as a result, a certain limit is placed on the value of CFI that each component carrier can have, based on this association Since it can be decoded, even if an error occurs in the value of the CFI in a specific component carrier, it can be decoded based on the CFI value of another component carrier. If the range of resource allocation does not satisfy the requirements of the corresponding CC during the joint decoding process, the scheduling controller 980 may perform resource scheduling to perform resource allocation to match the CFI of each carrier. .

The combination subset extractor 930 extracts a subset from the L ^N combinations as described above. In the process of extracting a subset, a predetermined rule may be applied. Information about such a rule is set by the rule selector 910, and the information about the set rule is transmitted to the user terminal through the higher layer signaling unit 990, so that the user terminal can use it in the decoding process. Information that can be selected by the rule selector 910 may be information about how many elements of the entire set to create a subset, or which elements to include in the subset, for calculating the subset If there is an expression, the parameter of the expression may be one rule information. The configuration of the subset extracted by the combination subset extracting unit 930 is shown in Table 4.

[Table 5] Configuration example of extracted subset

The combination subset element selector 940 receives CFI values CFI ₀ , CFI ₁ ,..., CFI _{N-1 that} fall within a range of values that can be requested or set by a plurality of CCs. In addition, the elements having the same or most similar value may be selected by comparing the input values with the elements extracted by the combination subset extracting unit 930. In addition, the PCFICH may be configured by setting the CFI value of each component carrier according to the selected component j.

In addition, the difference occurring in the CFI value to be allocated and the element value of the CFI subset combination set actually selected may be corrected or compensated by the scheduling coordinator 980 using intercarrier scheduling.

On the other hand, when the combined subset element selector 940 selects the CFI value to satisfy a predetermined condition, it is not necessary to perform intercarrier scheduling. This may configure the combination subset element selector 940 to select the CFI value to satisfy the following conditions.

In the combination subset element selection unit 940 when the j th element CFIi, j is available in the combination subset element selection unit 940 for the initial CFI value that should be assigned in FIG. 9.

Select an element (CFIi, j) that satisfies. In this case, since CFIi, j always has a value equal to or greater than the CFIi required by the corresponding component carrier, the space of the control region is not reduced, and as a result, scheduling of the component carriers can be implemented without progress.

The rule information for selecting the CFI subset is variously selected according to the characteristics of the CFI subset, and parameters influencing the selection may be transmitted from the higher layer signaling unit 990 to the user terminal.

The following describes the construction of the subset. For convenience of description, it is extracted to include the CFI values of five component carriers. Since CFI can have a total of three values, L becomes 3 (the value of CFI is 0 to 2).

The CFI combination set generation unit 920 may generate 243 combinations (L ^N , that is, 3 ⁵ ) as combinations of ^five component carriers having three values. You can assign a combined value (CFI _g ) to these combinations, such as 0 through 242, and the CFI values (CFI ₀ , CFI ₁ , CFI ₂ , CFI ₃ , CFI ₄ ) that five component carriers can have for that component. ) Can also be set.

An embodiment in which the relationship between the combined value (CFI _g ) of 0 to 242 and the value of the CFI of each component carrier can be defined is shown in Equation 4.

[Equation 4]

CFI _g is an index value representing all possible combinations in each CC and has a value of 0 to L ^N -1. In addition, the CFI CFI _{g i} can be reduced by using the following formula.

[Equation 5]

When L is 3 and N is 5, it can calculate as follows.

[Equation 6]

CFI ₀ = (CFI _g / 1)% 3

CFI ₁ = (CFI _g / 3)% 3

CFI ₂ = (CFI _g / 9)% 3

CFI ₃ = (CFI _g / 27)% 3

CFI ₄ = (CFI _g / 81)% 3

As a result, a brief description of some of the values that can be calculated by the CFI combination set generation unit 920 is as follows.

TABLE 6

In the table, the combined subset extracting unit 930 may extract some CFI _g . The following equation can be applied to extract a specific CFI _g . Some of the CFI _g extracts are called ECFIs. One method of extracting ECFI is uniform extraction. That is, it means that the extracted CFI _g (ie ECFI) to have a uniform value. The formula for extraction is as follows.

[Formula 7]

For example, in the case of L = 3 and N = 5, CFI _g has a value of 0 to 242, where 3 (P = 3) values are extracted as follows. Where N 'is less than or equal to N. If N 'is less than N, the above process is performed for a part of the whole CC. If N' is equal to N, it means that the above process is performed for a part of the CC set. . This means that the component carriers in which control information is indicated only in the own component carriers without being instructed or instructed by the intercarrier scheduling can be excluded in the above process.

Calculating the case where P is 3, ECFI ₀ , ECFI ₁ , ECFI ₂ , can be calculated as follows.

Equation 8

The subset calculated by the above formula is composed as the following table.

TABLE 7

The subset is selected to have three elements by ECFI ₀ , ECFI ₁ , and ECFI ₂ , and the combination subset element selector 940 of FIG. 9 determines the input CFI values and the elements of j = 0, 1, 2. By comparing the values, the same or most similar value can be selected and configured as PCFICH.

Therefore, the initial CFI value (CFI₀, CFI_One, CFI₂, CFI₃, CFI₄) Are 2, 1, 1, 0, and 1, respectively, the combination subset element selector 940 selects j = 1 having the closest value (CFI)._{0,                  j}                  , CFI_{One,                  j} , CFI_{2,                  j} , CFI_{3,                  j} , CFI_{4,                  j} ) Can be configured as PCFICH by setting the value of) to (1, 1, 1, 1, 1). In this process, inter-carrier scheduling can also be adjusted.

In the case of uniform extraction, the value of P is 9 as follows.

TABLE 8

As the value of P increases, the number of elements in the subset increases, and a more appropriate CFI value can be set. However, the effect of correcting errors through joint decoding is reduced. For example, if P is 3 and the values of CFI ₀ , CFI ₁ , CFI ₂ , CFI ₃ , and CFI ₄ are (2, 1, 2, 2, 2), CFI ₁ has encountered an error and corrects it to 2. Joint decoding is possible. However, if P is 9, if the values of CFI ₀ , CFI ₁ , CFI ₂ , CFI ₃ , and CFI ₄ are (2, 1, 2, 2, 2), j is 7, and CFI ₃ fails. It is difficult to determine if j is 8 and if CFI ₁ is in error. As P increases, the combination of values of CFI that can be selected varies, but joint decoding makes it difficult to correct errors. By performing joint decoding, the reliability of data can be further improved. That is, in decoding the CFI value from the received signal, the reliability of the decoded value can be further improved, and as a result, the accuracy of the data can be improved. That is, in Table 8 in which three pieces are uniformly extracted, the Hamming distance of the PCFICH by joint decoding is 105, and the Hamming distance when nine pieces are uniformly extracted is 42.

On the other hand, a subset can be obtained by arbitrary extraction. As an example of random extraction, a combination of CFIs most frequently generated in a corresponding CC may be set as a subset element, and may be configured to increase joint decoding performance.

Random sampling can be organized to better suit the performance of the system. That is, non-uniform extraction may be performed in consideration of the current channel conditions and bandwidth of the current network, and requirements of the user terminal. The case of random extraction is shown in Table 9.

TABLE 9

Random extraction can increase the possibility of error improvement due to joint decoding.

In the case of uniform extraction, as P increases, the range of selectable elements becomes wider, but the possibility of error correction due to joint decoding is lowered. When modified extraction is performed through the following equation, joint decoding performance can be improved.

Equation 9

a is an arbitrary real number that allows you to adjust the spacing between the elements you want to extract. When a = 5/3 and P = 27, it is calculated as shown in the following table. In the table below, the Hamming distance can be increased to 42.

TABLE 10

Meanwhile, CFI ₀ , CFI ₁ , CFI ₂ , CFI ₃ , and CFI ₄ calculated in Tables 5, 6, 7, 8, 9, and 10 described above are applied to specific component carriers, respectively, but this application is not fixed. That is, CFI ₀ , CFI ₁ , CFI ₂ , CFI ₃ , and CFI ₄ may be symmetrically CFI values of CC ₀ , CC ₁ , CC ₂ , CC ₃ , CC ₄ , but the network situation or the UE situation Considering this, the mapping may be changed. For example, and, a ₃ CFI CFI CFI ₁ so that the values of CC ₃ may comprise a way to transform such that the CFI value of CC _1. Therefore, the order of the control type information columns that can be included in each carrier can be changed to change the value of the carrier. This heat exchange can proceed if the characteristics of the component carriers are more suitable for the CFI values assigned to other component carriers.

In the case of three non-uniform extractions, an example in which columns are changed is shown in FIG. 10.

10 is a diagram illustrating an example of converting a value of control information of a CC according to an embodiment of the present invention.

1001 in FIG. 10 is a subset calculated before changing the heat. In consideration of the resource request of the user terminal, the quality of service (QoS) request, the channel condition, and the like, control information allocated to CC4, for example, control information allocated to CC1, for example, the value of CFI of CC1 of 1001. More suitable, on the contrary, when the characteristics of the control information allocated to CC1 are more suitable for the CFI value of 1001 previously assigned to CC4, the values of the control information of CC1 and CC4 may be converted. As a result, it can be converted to 1002.

The determination of whether the heat is changed may also be made by a base station such as an eNB, and may be changed in consideration of resource requirements, QoS requirements, channel conditions, etc. of UEs (user terminals). In addition, permutation may be configured to predict resource requirements required by the control channel and to form a set suitable for such prediction.

In addition, when the position of the component carrier changes, such as 1002, the changed fact is transmitted to the user terminal based on higher layer signaling, and as a result, the user terminal may perform joint decoding according to the changed matter. It is also possible to give more varied values within a limited combination.

In the process of providing the rule information, in addition to the information on the subset or parameters of the equation required to select the subset, combination information about the position change of the CC may be provided together. The information may be log ₂ (N!) When the number of component carriers is N. The portion where the subset is re-adjusted or the position of the component carrier is changed is semi-static, so it is changed / re-adjusted periodically or according to the decision of the base station or the request of the terminal. Through known to the user terminal.

In addition, only some columns (CFI values for some component carriers) may be selected within the subset according to the type of component carriers. For example, when component carriers are divided in relation to scheduling between component carriers, i) component carriers containing only PDCCHs indicating scheduling between component carriers, ii) component carriers instructed between component carriers, and ii) scheduling between component carriers The component carriers corresponding to both receiving or receiving iii) may be divided into component carriers in which only scheduling in the component carriers is performed regardless of scheduling between component carriers, and i), ii) and iii). Internal scheduling may be performed by another PDCCH regardless of scheduling between CCs. Therefore, in the process of selecting a subset of the control set combination by uniform extraction, non-uniform extraction, etc., the range may be performed for all component carriers or may be limited only for component carriers related to scheduling between component carriers. That is, in selecting a subset of the control set combination proposed in the present invention, the range may be limited only to the component carriers of i), ii) and iii), but i), ii), iii), and iv) are all limited. This may be achieved by considering. In addition, regardless of scheduling between CCs, it may be divided into groups according to specific criteria (which may be arbitrarily configured). That is, when the total number of carriers is N for N '<N'

By dividing into k groups, the partial control instruction combination set can be configured for the entire combination (when the number of carriers of Ni) is included in each group.

In the process of setting control information such as CFI through FIG. 9, as shown in FIG. 3, the relationship between component carriers receiving resource allocation by component scheduling and component carriers where PDCCH indicating resource allocation exists overlaps each other (indicated from each other). In order to make up a significant portion of the total CC set. This method extracts a part of the combination of all CFI values existing for each CC. The method of FIG. 9 may also be applied to resource allocation from a plurality of CCs as shown in FIG. 2.

In FIG. 9, 10 and a plurality of tables, setting the CFI value to 0-2 is for convenience of operation, and adds 1 or 2 to 1 to 3 according to the number of resource block groups allocated to the network. You can add 2 to be 4. In addition, CFI0 logically matches CC0, but numbers such as CC0 and CC1 do not mean a specific component carrier, or an order between component carriers and a position on a frequency bandwidth. Only logical information indicating the CC can be determined.

The techniques described herein allow a user terminal on the receiving side to resolve an error in the transmission of indication information such as a control type indicator in a system in which two or more CCs are used. That is, the rule information for inferring the indication information can be implemented to be transmitted and received between the eNB and the UE through the RRC signaling (upper layer signaling), wherein the transmitted and received rule information can be directly or a value of the indication information such as PCFICH. This information is indirectly indicated. For example, when a situation as shown in FIGS. 2 and 3 occurs, the user terminal can determine the value of the CFI. To this end, as described above, the predetermined value may be maintained, the indication information may be determined using a value of another component carrier using a predetermined function, or by using a predetermined indication information set.

In the present specification, since the set rule information may be maintained to be semi-static and change by higher layer signaling, it may be actively applied according to the network situation. In addition, if the CFI value that is properly configurable by the resource allocation request is smaller than the value set by the rule information, the CFI value is excessively determined and resource waste caused by the control region determined by the CFI value occurs more than necessary. In order to prevent the intercarrier scheduling may be performed over the entire carrier range. In addition, since the rule information for setting the value of the CFI can be adjusted through higher layer signaling, resource waste can be avoided.

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 not intended to limit the technical idea 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 protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

CROSS-REFERENCE TO RELATED APPLICATION

This patent application claims priority under Patent Application No. 10-2010-0013049, filed with Korea on February 11, 2010, pursuant to Article 119 (a) (35 USC § 119 (a)). All content is incorporated by reference in this patent application. In addition, if this patent application claims priority for the same reason as above for a country other than the United States, all the contents thereof are incorporated into this patent application by reference.

Claims (21)

1. In devices that use more than one CC

   Transmitting rule information to a user terminal through higher layer signaling;

   Generating indication information for setting a range of an area of a component carrier from the rule information; And

   And transmitting the component carrier including the indication information.
2. The method of claim 1,

   The rule information includes information on the value of the indication information,

   The generating step includes setting the value of the indication information to a value included in the rule information.
3. The method of claim 1,

   The rule information is information about a function that generates one result from two or more input values.

   Generating the indication information

   And inputting, into the function, indication information of a second component carrier for allocating a resource to the component carrier, wherein the indication information is transmitted in carrier aggregation.
4. The method of claim 1,

   The component carrier is composed of a first component carrier and a second component carrier,

   And the rule information includes information necessary for generating a subset of a set of indication information that the first and second component carriers may have.
5. The method of claim 4, wherein

   The generating step

   Selecting elements in the subset that are the same as or similar to the first indication information and the second indication information that are initial indication information of the first and second component carriers. .
6. The method of claim 4, wherein

   And the rule information includes information in which indication information that the first and second component carriers may have in the subset is exchanged.
7. The method of claim 1,

   And the indication information is information indicating a range of an area in which control information is included in the CC.
8. The method of claim 1,

   And the indication information is information indicating a range of an area in which data information is included in the CC.
9. The method of claim 1,

   After the generating step

   Performing carrier-to-carrier scheduling.
10. The method of claim 1,

    And the rule information includes the indication information as it is.
11. In a user terminal using more than one CC

    Receiving rule information through higher layer signaling from a base station;

    Receiving a component carrier;

    Extracting indication information from component carriers using the rule information; And

    And decoding the data of the CC according to the indication information.
12. The method of claim 11,

    The rule information is information about a function that generates one result from two or more input values.

    Extracting the indication information

    And inputting and extracting indication information of a second component carrier for allocating a resource to the component carrier, in the function.
13. The method of claim 11,

    The component carrier is composed of a first component carrier and a second component carrier,

    And the rule information includes information necessary for generating a subset of a set of indication information that the first and second component carriers may have.
14. The method of claim 13,

    The extracting step

    Selecting the first indication information and the second indication information which are the same as or similar to the first indication information of the first and second component carriers in the subset and extracting the indication information of the component carriers; How to receive indication information in aggregation.
15. The method of claim 13,

    And the rule information includes information in which indication information that the first and second component carriers may have in the subset is exchanged.
16. In devices that use more than one CC

    A rule information generator for generating rule information;

    An indication information generation unit for generating indication information for setting a range of the region of the CC from the rule information;

    A signal generator which generates a component carrier including the indication information generated by the indication information generator as a signal; And

    And a transmitter for transmitting the generated signal, wherein the rule information is transmitted through higher layer signaling.
17. The method of claim 16,

    The rule information is information on a function for calculating a result from two or more input values.

    The instruction information generation unit

    And an indication information of a second component carrier for allocating a resource to the component carrier by inputting to the function to generate the indication information.
18. The method of claim 16,

    The component carrier is composed of a first component carrier and a second component carrier,

    And the rule information includes information necessary for generating a subset of a set of indication information that the first and second component carriers may have.
19. In a user terminal using more than one CC

    A receiver for receiving rule information and component carriers from the base station;

    A rule information storage unit for extracting and storing the rule information;

    An indication information extracting unit which extracts indication information from the CC using the rule information; And

    And a decoder which decodes data of the CC according to the indication information, wherein the rule information is transmitted through higher layer signaling.
20. The method of claim 19,

    The rule information is information about a function that generates one result from two or more input values.

    The instruction information extracting unit

    And receiving indication information in carrier aggregation, extracting indication information of a second component carrier for allocating a resource to the component carrier by inputting to the function.
21. The method of claim 22,

    The component carrier is composed of a first component carrier and a second component carrier,

    And the rule information includes information necessary for generating a subset of a set of indication information that the first and second component carriers may have.

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