JP6024818B2 - Resource allocation method, channel state information transmission method, base station, and user equipment - Google Patents

Description

  The present invention relates to the field of wireless communication, and in particular, to a resource allocation method, a channel state information transmission method, a base station, and a user apparatus.

  In the long-term evolution advanced system (LTE), user equipment (UE: User Equipment) detects downlink reference signals, thereby detecting downlink channel state information (CSI: Channel State Information). And reports to the base station via the uplink. The channel state information CSI includes a downlink channel quality indicator (CQI), and some downlink transmission modes include a precoding matrix indicator (PMI) and a rank indicator (RI). : Rank Indication) information is also included. The channel state information CSI, reception response ACK / NACK information, and scheduling request (SR) are collectively referred to as uplink control information (UCI). The uplink control information UCI may include one or more of the information. Base station selects typical modulation and coding method, multi-antenna processing, hybrid automatic repeat request HARQ, etc. based on uplink control information UCI reported by user equipment UE, and dynamically adjusts data transmission adaptively To do.

  Currently, the channel state information CSI in the uplink control information UCI can be reported periodically or aperiodically. For ease of explanation here, the periodically reported channel state information CSI is referred to as periodic channel state information CSI, and the aperiodically reported channel state information CSI is referred to as aperiodic channel state information CSI. Normally, uplink control information UCI including periodic CSI is transmitted using a physical uplink control channel (PUCCH). Uplink control information UCI including aperiodic channel state information CSI is transmitted on a physical uplink shared channel (PUSCH). Further, it can be shared with uplink data (for example, UL-SCH data: Uplink Shared Channel data), or can be transmitted independently on the physical uplink shared channel PUSCH when there is no uplink data.

  When the user apparatus UE needs to report the aperiodic channel state information CSI, the following method can be adopted: the base station needs to report the aperiodic channel state information CSI to the user apparatus UE The base station transmits a downlink control information (DCI: Downlink Control Information) to the user equipment UE and reports the aperiodic channel state information CSI through the downlink control command DCI. Instructs the user apparatus UE and allocates a physical uplink shared channel (PUSCH) resource used to report the aperiodic CSI to the user apparatus UE; the user apparatus UE receives the downlink control information DCI The non-periodic channel state information CSI is reported based on the resource indicated in the downlink control command DCI, and the channel state information CSI is uplink controlled. And it transmits to the base station via the PUSCH including the distribution UCI.

  In the LTE system, 1 bit in DCI format 0 is used to trigger the user apparatus UE to report aperiodic channel state information CSI. In the LTE-A system (LTE-A: Advanced Long-term Evolution System), the system can support transmission of multiple component carriers (CC: Component Carrier) and can currently support up to 5 component carriers CC. In order to be able to flexibly instruct the user equipment UE to report the uplink control information UCI of the downlink component carrier CC, the aperiodic channel state information is transmitted to the user equipment UE using 2 bits in DCI format 0 / DCI format 4. Trigger CSI reporting and indicate the index number and number of the downlink component carrier CC corresponding to the reporting.

In realizing the present invention, the inventor has discovered that the following problems exist in the prior art:
In the LTE system, only one pair of uplink / downlink component carrier CC is allocated to each user apparatus UE. When this user apparatus UE transmits uplink control information UCI including aperiodic channel state information CSI on a physical uplink shared channel PUSCH without data, the base station allocates up to four RBs to the user apparatus UE Assures correct reception of uplink control information UCI including aperiodic channel state information CSI at a reasonable channel coding rate.

  However, in the LTE-A system, the length of the uplink control information UCI increases as the number of component carriers (CC) increases. If the base station allocates up to four RBs to the user apparatus UE, there is a possibility that the resource for transmitting the uplink control information UCI including the aperiodic channel state information CSI that the base station allocates to the user apparatus UE may be insufficient. is there. Therefore, it cannot be guaranteed that the base station correctly receives the uplink control information UCI, the scheduling restriction on data transmission of the base station is increased, and there is no method for solving these problems until now.

  It should be noted that the above introduction to the background art is merely a clear and complete description of the technical solution of the present invention and is easily understood by those skilled in the art. It should not be determined that these technical solutions are well known to those skilled in the art because these technical solutions were introduced in the background section of the present invention.

  An object of an embodiment of the present invention is to provide a resource allocation method, a channel state information transmission method, a base station, and a user apparatus. Since the base station can allocate resources based on the number of related downlink component carriers corresponding to the aperiodic channel state information CSI that needs to be reported to the user equipment, the resource allocation method can be flexibly applied. In addition, it can support transmission of uplink control information including aperiodic CSI under multi-carrier conditions, effectively increasing the probability of correctly receiving uplink control information, and reducing scheduling restrictions on data transmission be able to.

  According to one aspect of an embodiment of the present invention, a resource allocation method is provided. The method determines that the base station needs to report the aperiodic channel state information CSI of the associated downlink component carrier to the user equipment; the base station determines the number of the associated downlink component carrier Allocating resources corresponding to the user equipment on the basis.

According to another aspect of an embodiment of the present invention, a base station is provided. The base station
A first determining unit that determines that the user equipment needs to report the aperiodic channel state information CSI of the associated downlink component carrier;
A resource allocation unit that allocates resources corresponding to the user equipment based on the number of the relevant downlink component carriers.

According to another aspect of an embodiment of the present invention, a method for transmitting uplink control information is provided. The method is
The base station generates downlink control information, and the downlink control information instructs the user equipment whether to report aperiodic channel state information of the related downlink component carrier, and the related downlink component carrier When reporting non-periodic channel state information, the information includes indication information indicating the index number and number of the relevant downlink component carrier, the index number of the coded modulation scheme, and the resource to be used; The resource is a resource assigned to the user equipment based on the number of the relevant downlink component carriers by the base station;
The base station transmits downlink control information to the user apparatus, and the user apparatus transmits an aperiodic channel based on instruction information included in the downlink control information, a coded modulation scheme index number, and a resource to be used. Sending status information.

According to another aspect of an embodiment of the present invention, a method for transmitting channel state information is provided. The method is
The user apparatus receives the downlink control information transmitted from the base station, and the downlink control information instructs the user apparatus whether to report the aperiodic channel state information of the associated downlink component carrier, and , When reporting the aperiodic channel state information of the associated downlink component carrier, instruction information for instructing the user equipment the index number and number of the associated downlink component carrier, the index number of the coded modulation scheme, and the use Here, the resource to be used is a resource that the base station assigns to the user apparatus based on the number of the related downlink component carriers;
The user apparatus includes transmitting aperiodic channel state information based on the instruction information, the coded modulation scheme index number, and the resource to be used included in the downlink control information.

  According to another aspect of an embodiment of the present invention, a base station is provided. The base station includes an information generation unit and a first information transmission unit.

  The information generation unit generates downlink control information. When the downlink control information instructs the user equipment whether to report the aperiodic channel state information of the related downlink component carrier and reports the aperiodic channel state information of the related downlink component carrier Includes the instruction information indicating the index number and number of the relevant downlink component carrier, the index number of the coding modulation scheme, and the resource to be used; where the base station uses the relevant downlink It is a resource allocated to the user apparatus based on the number of component carriers.

  The first information transmission unit transmits the downlink control information to the user apparatus, and the user apparatus is based on the instruction information, the encoded modulation scheme index number, and the resource to be used included in the downlink control information. To transmit aperiodic channel state information.

  According to another aspect of an embodiment of the present invention, a user equipment is provided. The user device includes an information receiving unit and a second information transmitting unit.

  The information receiving unit receives downlink control information transmitted from the base station. When the downlink control information instructs the user equipment whether to report the aperiodic channel state information of the related downlink component carrier and reports the aperiodic channel state information of the related downlink component carrier Includes the instruction information indicating the index number and number of the relevant downlink component carrier, the index number of the coding modulation scheme, and the resource to be used; where the base station uses the relevant downlink It is a resource allocated to the user apparatus based on the number of component carriers.

  The second information transmission unit transmits aperiodic channel state information based on the instruction information included in the downlink control information, the coded modulation scheme index number, and the resource to be used.

  According to another aspect of an embodiment of the present invention, a recording medium storing a computer-readable program is provided. The computer readable program causes a computer to execute the resource allocation method described above at the base station.

  According to another aspect of an embodiment of the present invention, a computer readable program is provided. When the program is executed in the base station, the program causes the computer to execute the above-described channel state information transmission method in the base station.

  According to another aspect of an embodiment of the present invention, a recording medium storing a computer-readable program is provided. The computer-readable program causes a computer to execute the above-described channel state information transmission method at the base station.

  According to another aspect of an embodiment of the present invention, a computer readable program is provided. When the user device executes the program, the program causes the computer to execute the above-described channel state information transmission method on the user device.

  According to another aspect of an embodiment of the invention, a recording medium having a computer-readable program stored thereon is provided. The computer-readable program causes a computer to execute the above-described channel state information transmission method in the user apparatus.

  The beneficial effect of an embodiment of the present invention is that the base station allocates resources based on the number of associated downlink component carriers corresponding to aperiodic channel state information that needs to be reported to the user equipment, The resource allocation method can be applied flexibly, and it can support transmission of uplink control information under multi-carrier conditions, effectively increasing the probability of correctly receiving uplink control information, and limiting scheduling for data transmission. Can be reduced.

  The following description and drawings disclose specific embodiments of the present invention in detail and clearly illustrate the forms in which the principles of the present invention are employed, but the scope of the embodiments of the present invention is not limited thereto. It should be appreciated that various changes, modifications, or equivalents may be designed to the invention within the spirit and scope of the appended claims.

  Features described and / or illustrated for one embodiment may be used in one or more other embodiments in the same or similar manner, and may be combined or otherwise combined with features in other embodiments. The features of this embodiment can be substituted.

  It should be emphasized that the term “comprising / comprising” herein refers to the presence of a feature, element, step or module and does not exclude the presence or addition of one or more other features, elements, steps or modules. .

The above and other objects, features and advantages of the present invention will become more apparent with reference to the following description of the invention with reference to the drawings.
2 is a flowchart of a resource allocation method according to Embodiment 1 of the present invention; FIG. 6 is a schematic diagram illustrating a configuration of a base station according to Embodiment 2 of the present invention; It is the schematic which shows the structure of the resource allocation unit of Example 2 of this invention; It is a flowchart of the transmission method of the uplink control information of Example 3 of this invention; FIG. 6 is a schematic diagram illustrating a configuration of a base station according to Embodiment 4 of the present invention; It is a flowchart of the transmission method of the uplink control information of Example 5 of this invention; It is a flowchart for implement | achieving step 602 of Example 5 of this invention; It is a flowchart for implement | achieving step 703 of Example 5 of this invention; FIG. 7 is a schematic diagram illustrating a configuration of a user apparatus according to a sixth embodiment of the present invention; 10 is a schematic diagram illustrating a configuration of a second information transmission unit of FIG. 9; It is the schematic which shows the structure of the 2nd judgment unit of FIG. It is a flowchart of the transmission method of the uplink control information by the base station side of Example 7 of this invention; It is a flowchart of the transmission method of the uplink control information by the user apparatus side of Example 7 of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. These embodiments are merely exemplary and do not limit the invention. In order to make it easier for those skilled in the art to understand the principles and embodiments of the present invention, the embodiments of the present invention will be described using an LTE-A (LTE-A: Long Term Evaluation Advanced) system with 10 MHz broadband as an example. It will be understood that the invention is not limited to the above-described system, but can be applied to other systems related to multi-carrier non-periodic channel state information transmission.

FIG. 1 is a flowchart of the resource allocation method according to the first embodiment of this invention. As shown in FIG. 1, the method
The base station determines that the user equipment needs to report the aperiodic channel state information CSI of the associated downlink component carrier CC; 101,
The base station includes a step 102 of allocating resources corresponding to the user equipment based on the number of the relevant downlink component carriers CC.

  As is clear from the above embodiment, the base station allocates resources based on the number of related downlink component carriers corresponding to the aperiodic channel state information CSI that needs to be reported to the user equipment, thereby Can be flexibly assigned, and can cope with transmission of uplink control information in a multi-carrier situation, so that the problems in the prior art can be solved.

  In the present embodiment, the aperiodic channel state information CS may include a channel quality indication CQI. For some downlink transmission modes, a precoding matrix indicator indicator PMI and rank indicator RI information may further be included.

  In this embodiment, the aperiodic channel state information CSI can be included in the uplink control information UCI and transmitted to the base station via the PUSCH. Also, ACK / NACK information is included in the uplink control information UCI together with the channel state information CSI, and can be transmitted to the base station via the PUSCH. Whether the ACK / NACK information and the aperiodic channel state information CSI are transmitted together is similar to that of the prior art, and thus detailed description thereof is omitted here. In this way, the base station selects a typical modulation and coding scheme, multi-antenna processing, HARQ process, and the like based on the uplink control information UCI reported by the user apparatus UE, and adaptively transmits data. It can be adjusted dynamically.

  In the present embodiment, the number of relevant downlink component carriers CC may be one or more. The base station allocates resources to the user apparatus UE based on the number of the relevant downlink component carriers CC.

In this embodiment, the base station can adopt the following method when allocating resources corresponding to the user equipment based on the number of the relevant downlink component carriers:
If the base station determines that the user apparatus UE needs to report the aperiodic channel state information CSI of one downlink component carrier CC, the base station allocates a resource ( The maximum value of the number of RB) is a predetermined first numerical value L1; if the base station needs to have the user equipment UE report aperiodic channel state information CSI of one or more downlink component carriers CC If it is determined that there is, the maximum value of the number of resources (RB) that the base station allocates to the user apparatus UE is the predetermined second numerical value L2.

  Here, the second numerical value L2 is larger than the first numerical value L1. The first numerical value L1 and the second numerical value L2 are determined based on a channel coding rate (CCR). By determining the first numerical value L1 and the second numerical value L2, the channel coding rate CCR can be set within a predetermined range. Of course, in some cases, the use of the first numerical value L1 and the second numerical value L2 may cause the channel coding rate CCR to exceed the reasonable range, but such a situation is extremely rare. Therefore, it seems that the first numerical value L1 and the second numerical value L2 are reasonable.

  Hereinafter, the first numerical value L1 and the second numerical value L2 will be described by taking one downlink component carrier CC and two downlink component carriers CC as examples.

  In the case of one downlink component carrier CC, as in the LTE system, if the preset channel coding rate CCR is smaller than one third, the first numerical value L1 is a maximum of 4, that is, the base station If four RBs are assigned to the maximum user apparatus UE, the channel coding rate CCR can be within a reasonable range.

  If two downlink component carriers are taken as an example when there are a plurality of downlink component carriers CC, the second numerical value L2 is larger than 4 if the preset coding rate CCR is still one third. It is an arbitrary value. However, in this embodiment, in order not to affect the normal transmission of other data or information in the system, when the aperiodic channel state information CSI is included in the uplink control information UCI and transmitted, If it can be ensured that the station normally receives the uplink control information UCI, the second numerical value L2 should be as small as possible.

  Table 1 shows that when there are two downlink component carriers and the number of allocated resources is four, three types of typical aperiodic channel state information CSI bit lengths (ie, payload is 100, The channel coding rate CCR values corresponding to transmission of various uplink control information and sounding reference signal (SRS) are shown. Table 2 shows various types of uplink in three types of typical aperiodic channel state information CSI bit length when there are two downlink component carriers and the number of allocated resources is five. A numerical value of a channel coding rate CCR corresponding to transmission of control information and a sounding reference signal (SRS) is shown. Table 3 shows that when there are two downlink component carriers and the number of allocated resources is six, three types of typical non-periodic channel state information CSI bit lengths indicate various uplinks. A numerical value of a channel coding rate CCR corresponding to transmission of control information and a sounding reference signal (SRS) is shown.

As can be seen from Table 1, when the number of downlink component carriers CC is 2, if still 4 RBs are allocated, CQI + A / when Aperiodic CSI payload = 136 and 144 When transmitting N + RI or CQI + A / N + SRS + RI, the coding rate CCR exceeded a predetermined range. When CQI + A / N + SRS + RI is transmitted when aperiodic CSI payload = 100, the coding rate CCR exceeds a predetermined range. In this case, it is not guaranteed that the base station correctly receives the uplink control information UCI.

  As can be seen from Table 2, if RB = 5, the channel coding rate only when aperiodic CSI payload = 136 and CP = 144 and CQI + A / N + SRS + RI is transmitted. RB = 5 seems to be a reasonable number considering that the CCR exceeds the specified range but there are relatively few cases of transmitting CQI + A / N + SRS + RI.

  As can be seen from Table 3, if RB = 6, the channel coding rate CCR is all within a predetermined range. As is clear from the above, when determining the number of allocated resources, it is necessary to consider that the channel coding rate CCR is within a reasonable range and that the number of resources is as small as possible. In this way, the influence on the transmission of other resources can be reduced. Experience has shown that in the case of two CCs, the second numerical value L2 is most preferred when the maximum is 5 or 6.

  The situation of two CCs has been described above, but when the number is larger than two CCs, the method for determining the second numerical value L2 is the same as described above. Further, since a conventional calculation method can be adopted as a channel coding rate calculation method, detailed description thereof is omitted here.

  As is clear from the above example, the base station can allocate resources based on the number of associated downlink component carriers corresponding to the aperiodic channel state information CSI that needs to be reported to the user equipment, Resource allocation can be performed flexibly and it is possible to cope with transmission of channel state information under multi-carrier conditions, so that the problems in the prior art can be solved.

  All or some of the steps of the method of the embodiment described above can be realized by instructing related hardware via a program, and the program is recorded on a computer-readable recording medium and the program is executed. It will be understood by those skilled in the art that all or some of the steps of the method of the above embodiment can be included, and the recording medium includes a ROM, a RAM, a magnetic disk, and an optical disk.

  According to an embodiment of the present invention, a base station is provided as in Embodiment 2 below. The principle by which the base station solves the problem is the same as the resource allocation method by the base station, and since the implementation of the base station can refer to the implementation of the method, the description of overlapping parts is omitted.

  FIG. 2 is a schematic diagram illustrating the configuration of a base station according to the second embodiment of the present invention. As shown in FIG. 2, the base station includes a first determination unit 201 and a resource allocation unit 202.

  The first determination unit 201 determines that it is necessary to have the user equipment report the aperiodic channel state information CSI of the associated downlink component carrier. The resource allocation unit 202 allocates resources corresponding to the user equipment based on the number of associated downlink component carriers.

FIG. 3 is a schematic diagram showing the configuration of the resource allocation unit of FIG. As shown in FIG. 3, the resource allocation unit 202 can include a first resource allocation unit 301 and a second resource allocation unit 302. When the first resource allocation unit 301 determines in the first determination unit 201 that it is necessary to report the aperiodic channel state information CSI of one downlink component carrier to the user apparatus, the maximum resource allocation unit 301 allocates to the user apparatus The number of resources of the first predetermined numerical value L1;
When the second resource allocation unit 302 determines that the first determination unit 201 needs to report the aperiodic channel state information CSI of one or more downlink component carriers to the user apparatus, the user apparatus The maximum number of resources allocated to is a predetermined second numerical value L2.

  Here, the second numerical value L2 is larger than the first numerical value L1. Further, the first numerical value L1 and the second numerical value L2 are determined based on the channel coding rate CCR.

  In the present embodiment, since the method for determining the first numerical value L1 and the second numerical value L2 is the same as that in the first embodiment, detailed description thereof is omitted here.

  As is clear from the above embodiment, the base station allocates resources in order to allocate resources based on the number of associated downlink component carriers corresponding to aperiodic CSI information that needs to be reported to the user equipment. It can be performed flexibly and can cope with the transmission of information in a multi-carrier situation, thereby solving the problems in the prior art.

  FIG. 4 is a flowchart of the uplink control information transmission method according to the third embodiment of the present invention. As shown in FIG. 4, the method includes steps 401 and 402.

  In step 401, the base station generates downlink control information DCI. The downlink control information DCI indicates to the user apparatus UE whether or not to report the aperiodic channel state information CSI of the associated downlink component carrier CC, and the aperiodic channel state of the associated downlink component carrier CC When reporting the information CSI, it includes instruction information indicating the index number and number of the relevant downlink component carrier CC, a coded modulation scheme (MCS) index number, and a resource RB to be used. Here, the resource RB to be used is a resource assigned to the user apparatus based on the number of the relevant downlink component carriers by the base station.

  In step 402, the base station transmits the downlink control information DCI to the user apparatus UE, and the user apparatus UE uses the instruction information, the coded modulation scheme index number, and the information included in the downlink control information DCI. Aperiodic channel state information CSI is transmitted based on the resource.

  In this embodiment, in step 401, when the base station determines that the related downlink component carrier-like aperiodic channel state information CSI needs to be reported to the user equipment UE, the base station responds to the transmission mode and system request. Based on this, the user equipment UE is instructed to generate the downlink control information DCI and report the channel state information UCI. Here, when generating the downlink control information DCI, the base station allocates resources to be used to the user apparatus UE based on the number of related downlink component carriers CC. Also, corresponding instruction information and a predetermined encoding scheme adjustment index number can be selected based on the correspondence relationship between the instruction information set in advance and the set of downlink component carriers CC.

  In the present embodiment, a conventional method can be adopted as a method for generating the downlink control information DCI, and thus detailed description thereof is omitted here. In addition, since the method in which the base station allocates resources corresponding to the user apparatus UE based on the number of related downlink component carriers CC has been described in the first embodiment, detailed description thereof is omitted here.

  In this embodiment, the downlink control information DCI generated in step 101 can be transmitted on the physical downlink control channel PDCCH. In this case, the bit information in DCI format 0 or DCI format 4 can be transmitted.

Table 4 shows transmission information and length of DCI format 0 in the LTE-A system of the embodiment of the present invention. FIG. 5 shows transmission information and length of DCI format 4 in the LTE-A system according to the embodiment of the present invention.

  Here, the instruction information can be transmitted using the 2-bit “CQI request” in Table 4 or Table 5. Accordingly, the corresponding states may be “00”, “01”, “10”, “11”. When each of the four types of states is used to indicate whether to report aperiodic channel state information CSI and to indicate that aperiodic channel state information CSI is to be reported, different downlink components Instruct the set of carriers.

  For example, when 2 bits are “00”, it can be instructed not to report the aperiodic channel state information CSI. Uplink data is transmitted only by PUSCH. When 2 bits are “01/10”, it can be instructed to report aperiodic CSI. It can be instructed to report the aperiodic channel state information CSI when the number of downlink component carriers CC included in the set of downlink component carriers CC is 1; and 2 bits is “11”. When the number of downlink component carriers CC included in the set of downlink component carriers CC is one or more, for example, two CCs, an index number of each component carrier CC is further indicated. Such a correspondence relationship is set on the base station side via a high layer signal, and is used for the base station when the correspondence relationship is maintained and downlink control information is generated. The instruction method is merely an embodiment of the present invention, and the instruction information can be set according to a specific situation.

  In this embodiment, when the aperiodic CSI is included in the uplink control information and transmitted to the base station via the PUSCH, the uplink control information UCI including the aperiodic CSI transmitted through the PUSCH is: 1) Uplink control information UCI is transmitted by PUSCH alone (CQI-only PUSCH), that is, uplink control information UCI when uplink data is not transmitted when transmitting the aperiodic CSI; 2) the uplink control information UCI and uplink data can be divided into uplink control information UCI when the uplink data is transmitted together with the uplink data, that is, when the aperiodic CSI is transmitted. Here, it is possible to determine which method is adopted to transmit the uplink control information based on a specific combination of the instruction information and the modulation and coding method and the number of resources to be used. Details thereof will be described in detail in Example 5.

  In this example, the base station needs to set a set of a plurality of sets of related downlink component carriers CC in the user apparatus UE in advance. Further, the user apparatus UE retains the set and the instruction information, for example, 2 bit information in DCI format 0/4 in association with each other, and further holds the correspondence on the user apparatus UE side. It is determined whether to transmit aperiodic CSI based on the information, and when transmitting the aperiodic CSI, the number of associated downlink component carriers CC and the index number (Index) are determined.

In the present embodiment, before the base station generates DCI for the user apparatus UE that needs to report the aperiodic channel state information CSI, the method further includes a plurality of sets of the base station in the user apparatus UE. A set of related downlink component carriers CCs of the corresponding downlink component carriers CC; and a set of the relevant downlink component carriers CC of the plurality of sets of related downlink component carriers CC are held in association with each other; and
When the base station generates the downlink control information DCI, the base station includes selecting corresponding instruction information based on the index number and the number of the relevant downlink component carrier CC.

For example, the case where the aperiodic channel state information CSI is included in the uplink control information UCI and transmitted will be described as an example. Tables 6 and 7 are respectively correspondence tables between instruction information set by the base station according to the embodiment of the present invention through high layer signals and a set of a plurality of sets of related downlink component carriers CC. However, Tables 6 and 7 are merely examples of the present invention, and the present invention is not limited to such a correspondence, and the base station can be set according to the actual situation.

  As is clear from the above, the base station sets the correspondence table shown in Table 7, and also holds the correspondence table on the user apparatus side. For example, when the base station knows that the user equipment UE needs to report the channel state information CSI of all downlink component carriers CC set by the system, and the channel state information CSI When the base information is transmitted by being included in the control information UCI, the base station knows that the corresponding instruction information is “11” from Table 7, and transmits “11” by “CQI request” in DCI. . In this way, when the user apparatus UE receives the DCI, the instruction information “11” can be read from the DCI, and all the downlink component carriers set by the system based on Table 7 are obtained. Uplink control information UCI including non-periodic channel state information CSI is reported.

  In the embodiment of the present invention, when the number of the relevant downlink component carriers CC is one in the set of the relevant downlink component carriers CC, the situation corresponding to “01” in Table 6 and Table 7 is shown. In addition, the related downlink component carrier CC is configured to be paired with the uplink component carrier CC of the PUSCH that transmits the uplink control information UCI through the system information block (SIB-2: System Information Block-2). It may be a component carrier CC. Further, the related downlink component carrier CC may not be a downlink component carrier CC corresponding to the uplink component carrier CC of the PUSCH that transmits the non-periodic CSI through the link of the system information (SIB-2). This is a situation corresponding to “10” in Table 6.

  For example, UL CC # 1 and UL CC # 2 are set for the uplink component carrier (UL CC), and DL CC # 1, DL CC # 2 and DL CC # 3 are set for the downlink component carrier CC. Here, UL CC # 1 and DL CC # 1 have a system information (SIB-2) link relationship. UL CC # 2 and DL CC # 3 have a system information (SIB-2) link relationship. However, DL CC # 2 does not have a UL CC for system information (SIB-2) link. The uplink control information UCI of DL CC # 2 can be transmitted through UL CC # 1 or UL CC # 2. For example, if the DCI format 0 schedules the UL CC # 1 PUSCH, when the instruction information in the DCI format 0 is '10', the non-DL CC # 2 is not used in the UL CC # 1 PUSCH. Means sending periodic CSI.

  In the present embodiment, when the number of relevant downlink component carriers CC is one or more in the set of relevant downlink component carriers CC, the relevant downlink component carrier CC is one set or activated. The downlink component carrier CC described above may be used. That is, the situation corresponds to “11” in Table 7. Alternatively, the situation may correspond to another downlink component carrier CC, for example, “11” in Table 6 and “10” in Table 7.

  As is clear from the above embodiment, the base station can allocate resources based on the number of associated downlink component carriers corresponding to the aperiodic channel state information CSI that needs to be reported to the user equipment. Therefore, it is possible to flexibly allocate resources, and to cope with transmission of uplink control information in a multi-carrier situation, and solve the problems in the prior art. In addition, the user apparatus uses the resources allocated based on the number of downlink component carriers by the base station to transmit the uplink control information including the aperiodic CSI, and the accuracy of the information received by the base station Can be guaranteed, and the scheduling limitation for data transmission can be reduced.

  According to the embodiment of the present invention, a base station is provided as in the fourth embodiment. The principle that the base station solves the problem is the same as the resource allocation method by the base station of the third embodiment, and the implementation of the base station can refer to the implementation of the method. .

  FIG. 5 is a schematic diagram illustrating the configuration of a base station according to the fourth embodiment of the present invention. As shown in FIG. 4, the base station includes an information generation unit 501 and a first information transmission unit 502.

  The information generation unit 501 generates downlink control information DCI. The downlink control information indicates to the user apparatus UE whether or not to report the aperiodic channel state information CSI of the associated downlink component carrier CC, and the aperiodic channel state information of the associated downlink component carrier CC This includes instruction information indicating the index number and number of the associated downlink component carrier CC when reporting CSI, a coded modulation scheme (MCS) index number, and a resource RB to be used. Here, the resource RB to be used is a resource that the base station assigns to the user apparatus UE based on the number of related downlink component carriers CC.

  The first information transmission unit 502 transmits the downlink control information DCI to the user apparatus UE, and the user apparatus UE is based on the instruction information included in the downlink control information DCI, the coded modulation scheme index number, and the resource to be used. To transmit aperiodic channel state information CSI.

  In this embodiment, the information generation unit 501 determines the need to report the aperiodic channel state information CSI of the associated downlink component carrier CC to the user equipment, based on the transmission mode and system requirements. Then, the user equipment UE is instructed to generate the downlink control information DCI and report the aperiodic CSI. Here, in the generated downlink control information DCI, the resource to be used is a resource that the base station assigns to the user apparatus UE based on the number of related downlink component carriers CC.

  In the present embodiment, DCI is employed and the downlink control information DCI can be transmitted in the PUCCH. Here, the instruction information can be transmitted by adopting a 2-bit “CQI request” in DCI format 0 or 4. Specifically, Example 3 can be referred to, and detailed description thereof is omitted here.

  In this embodiment, the base station further includes a resource allocation unit 503. The resource allocation unit 503 allocates corresponding resources to the user equipment UE based on the number of related downlink component carriers CC. Specifically, the resource allocation unit 503 can include a first resource allocation unit and a second resource allocation unit (not shown, similar to 301 and 302 in FIG. 3). Here, when the first resource allocation unit needs to report the aperiodic channel state information CSI of one downlink component carrier to the user apparatus, the maximum number of resources allocated to the user apparatus UE is When the second resource allocation unit needs to report the aperiodic channel state information CSI of one or more downlink component carriers to the user apparatus UE, the user apparatus The maximum number of resources allocated to the UE is a predetermined second numerical value L2, where the second numerical value L2 is larger than the first numerical value L1 and the first numerical value L1 based on the channel coding rate CCR. The second numerical value L2 is determined. Since a specific example for determining L1 and L2 has been described in the first embodiment, detailed description thereof is omitted here.

  Also, as shown in FIG. 5, the base station further includes an allocation unit 505 and a recording unit 506; where the allocation unit 505 is a set of a plurality of sets of related downlink component carriers CC for the user apparatus UE. The base station can be assigned like RRC via the high layer signal; the recording unit 506 has the indication information and a plurality of sets of associated downlink components as shown in Table 6 and Table 7. A set of carriers CC is associated and held.

  In this way, when generating the downlink control information DCI, the information generation unit 501 selects corresponding instruction information based on the index number and number of the relevant downlink component carrier CC.

  As is clear from the above embodiment, the information generation unit 501 determines that it is necessary to report the aperiodic channel state information of the associated downlink component carrier CC to the user equipment based on the actual situation. Corresponding instruction information, coding modulation scheme and resource to be used are selected, downlink control information DCI is generated, and the information is transmitted to the user equipment. Since the base station can allocate resources based on the number of downlink component carriers, it can flexibly allocate resources and can support transmission of uplink control information under multi-carrier conditions.

  FIG. 6 is a flowchart of the uplink control information transmission method according to the fifth embodiment of the present invention. As shown in FIG. 6, the method includes steps 601 and 602.

  In Step 601, the user apparatus UE receives downlink control information DCI transmitted from the base station, and the downlink control information DCI includes the aperiodic channel state of the associated downlink component carrier CC by the user apparatus UE. Indicates whether the information CSI needs to be reported, and indicates the index number and number of the relevant downlink component carrier CC when reporting the aperiodic channel state information CSI of the relevant downlink component carrier CC It includes instruction information, a coded modulation scheme (MCS) index number, and a resource RB to be used. Here, the resource to be used is a resource that the base station assigns to the user apparatus UE based on the number of the related downlink component carriers CC.

  Further, the base station can transmit the downlink control information DCI through the PDCCH. The user apparatus UE can read the instruction information, the coded modulation scheme (MCS) index number, and the resource RB to be used in the downlink control information DCI.

  In step 602, the user apparatus UE transmits aperiodic channel state information CSI based on the instruction information, the coded modulation scheme index number, and the resource to be used included in the downlink control information DCI.

  The user apparatus UE reports the aperiodic channel state information CSI through the uplink control information UCI. The uplink control information UCI is transmitted to the base station through the physical uplink shared channel PUSCH. Uplink control information UCI transmitted by PUSCH 1) The uplink control information UCI is transmitted by PUSCH alone (CQI-only PUSCH), that is, uplink data is not transmitted when aperiodic CSI is transmitted. The method can be divided into 2) a method of transmitting the uplink control information UCI and uplink data together with PUSCH, that is, a method of transmitting uplink data when transmitting aperiodic CSI. Here, it is possible to determine which method is used to transmit the uplink control information UCI according to a specific combination of the instruction information, the modulation and coding method, and the number of resources to be used. The process will be described in detail below.

  Hereinafter, the channel state information CSI will be described as an example of being included in the uplink control information UCI and transmitted to the base station via the PUSCH. The ACK / NACK information is transmitted to the base station via the uplink control information UCI together with the aperiodic channel state information CSI, but the ACK / NACK information is transmitted together with the aperiodic CSI. The determination of whether or not is similar to that of the prior art, and detailed description thereof is omitted here.

  FIG. 7 is a flowchart for realizing Step 602 of Embodiment 5 of the present invention. As illustrated in FIG. 7, the user apparatus UE performs aperiodic processing based on the instruction information included in the downlink control information DCI, the encoded modulation scheme index number, and the resource to be used through the following steps 701 to 706. Send CSI.

  In step 701, the user apparatus UE judges whether it is necessary to report the aperiodic channel state information CSI of the associated downlink component carrier CC based on the indication information in the received downlink control information DCI. If the determination result is “Yes”, Step 702 is executed, and if the determination result is “No”, Step 705 is executed.

  Here, the instruction information can be transmitted by a 2-bit “CQI request” in DCI format 0 or DCI format 4.

  The user apparatus UE reports the aperiodic channel state information CSI of the related downlink component carrier CC based on the instruction information and a correspondence relationship between the instruction information and a set of downlink component carriers that is held in advance. Determine whether or not.

  For example, based on the correspondence relationship in Table 6 or Table 7, if the 2-bit information is “00”, the user apparatus UE may determine that it is not necessary to report the aperiodic channel state information CSI. If the 2-bit indication information is “11/01/10” in the downlink control information, the user apparatus UE may determine that it is necessary to report the aperiodic channel state information CSI. And the number of downlink component carriers CC and the index number can be known based on Table 6 or Table 7.

  In step 702, if it is necessary to report the aperiodic channel state information CSI as a result of the determination in step 701, the user apparatus UE determines that the instruction information and the instruction information and downlink stored in advance are included. Based on the correspondence with the component carrier set, the index number and number of the relevant downlink component carrier are determined.

  For example, it can be determined based on the correspondence relationship in Table 6 or Table 7 and specific instruction information. For example, as shown in Table 6, if the instruction information can be determined to be “01”, it can be understood that uplink control information UCI including an aperiodic CSI of one downlink CC is transmitted. The index number of 1 is 1.

  In Step 703, it is determined whether to transmit only the uplink control information UCI including the non-periodic CSI based on the determined number of relevant downlink component carriers, the corresponding coded modulation scheme index number, and the resource to be used. If the result of the determination is to transmit only the uplink control information UCI, step 704 is executed; otherwise, step 706 is executed.

  Here, the specific determination process is as shown in FIG. 8, and will be described in detail below.

  In Step 704, if the result of the determination in Step 703 is “Yes”, the user apparatus UE, within a predetermined time, uses the resources allocated to the user apparatus UE by the base station via the PUSCH for the aperiodic CSI. Uplink control information UCI including is transmitted, and uplink data is not transmitted simultaneously.

  Here, the user apparatus UE transmits the UCI including the aperiodic CSI using the resource used by the base station assigned to the user apparatus UE, and the UCI further includes ACK / NACK information, It may also be sent with aperiodic CSI.

  In Step 705, if the result of the determination in Step 701 is “No”, the user apparatus UE transmits only uplink data using PUSCH.

  In Step 706, if the result of the determination in Step 703 is “No”, the user apparatus UE uses the resources allocated to the user apparatus by the base station and the uplink control information UCI including the aperiodic CSI and the uplink data Send.

  Here, when uplink control information UCI including the aperiodic CSI and uplink data are transmitted, the uplink control information UCI including the aperiodic CSI is transmitted to the base station by the PUSCH together with the uplink data through a multiplexing scheme. Can be sent. That is, when transmitting the uplink control information of the aperiodic CSI, a part of the resource of the uplink data is used, and the part of the resource does not need to be separately instructed via a signal, and the user It may be a resource used in this situation promised in advance by the device UE and the base station.

  FIG. 8 is a flowchart for realizing Step 703 of Embodiment 5 of the present invention. As shown in FIG. 8, the following steps 801 to 807 are included.

  In step 801, it is determined whether the number of the relevant downlink component carrier CC is one or more. If the result of the determination is one, step 802 is executed; if the result of the determination is one or more, step 805 is executed.

  In step 802, when there is one relevant downlink component carrier CC, it is further determined whether the modulation and coding scheme index is equal to the first predetermined value and the resource to be used is equal to or less than the first numerical value. Step 803 is executed if the determination result is “Yes”; Step 804 is executed otherwise.

  Here, is the modulation and coding scheme index MCS = 29, and is the resource to be used less than or equal to RB = 4?

  In Step 803, if the result of the determination in Step 802 is “Yes”, it can be determined that only uplink control information UCI including the aperiodic channel control information CSI is transmitted, and uplink data is not transmitted.

  In Step 804, if the result of the determination in Step 802 is “No”, it can be determined to transmit the uplink control information UCI including the aperiodic channel control information CSI and uplink data.

  In step 805, if the result of determination in step 801 is that the number of downlink component carriers CC is one or more, the modulation and coding scheme index is equal to the second predetermined value and the resource to be used is It is further judged whether it is less than or equal to the second numerical value; if the result of the judgment is “Yes”, step 806 is executed; otherwise, step 805 is executed.

  Here, whether the modulation and coding scheme index MCS = 29 and the resource to be used is RB = L or less; the second numerical value L is larger than the first numerical value, and preferably 5 or 6.

  In step 806, if the result of determination in step 805 is “Yes”, it can be determined that only uplink control information UCI including the aperiodic channel state information CSI is transmitted, and uplink data is not transmitted.

  In Step 807, if the result of the determination in Step 805 is “No”, it can be determined that uplink control information UCI and uplink data including the non-periodic channel state information CSI are transmitted.

  As is clear from the above embodiment, the user apparatus UE can determine the number of related downlink component carriers CC based on the received instruction information, and thereby the number of downlink component carriers CC, the modulation code, and so on. The transmission of the aperiodic channel state information CSI can be determined based on the synchronization method and the resource to be used. In addition, the aperiodic channel state information CSI can be included in the uplink control information UCI and transmitted. Since this method is applied to transmission of uplink control information in the case of multicarrier, it can solve the problems in the prior art.

  According to an embodiment of the present invention, a user apparatus is provided as in the following Embodiment 6. Since the principle of solving the problem in the user apparatus is similar to the uplink control information transmission method by the user apparatus, the embodiment of the user apparatus can refer to the embodiment of the method, and the description of the overlapping part is omitted. To do.

  FIG. 9 is a schematic diagram illustrating a configuration of a user apparatus according to the sixth embodiment of the present invention. As shown in FIG. 9, the user apparatus includes an information reception unit 901 and a second information transmission unit 902.

  The information receiving unit 901 receives downlink control information transmitted from the base station, and the downlink control information indicates whether or not the user apparatus reports the aperiodic channel state information of the related downlink component carrier. And indicating information indicating the index number and number of the related downlink component carrier when reporting the aperiodic channel state information of the related downlink component carrier, the encoded modulation scheme index number, and the resource to be used. Here, the resource to be used is a resource allocated to the user apparatus based on the number of related downlink component carriers by the base station.

  The second information transmission unit 902 transmits the aperiodic channel state information based on the instruction information included in the downlink control information, the coded modulation scheme index number, and the resource to be used. FIG. 10 is a schematic diagram showing the configuration of the second information transmission unit of FIG. As shown in FIG. 10, the second information transmission unit 902 includes a first determination unit 1001, a carrier determination unit 1002, a second determination unit 1003, a third information transmission unit 1004, and a fourth information transmission unit. 1005.

  The first determination unit 1001 determines whether it is necessary to report aperiodic channel state information of the associated downlink component carrier based on the indication information.

  When the carrier determination unit 1002 needs to report the aperiodic channel state information as a result of the determination of the first determination unit 1001, the correspondence between the instruction information and the instruction information held in advance and the downlink component carrier set To determine the index number and number of the associated downlink component carrier.

  The second determination unit 1003 determines whether to transmit only aperiodic channel state information based on the number of associated downlink component carriers determined by the carrier determination unit 1002, the corresponding coded modulation scheme index number, and the resource to be used. To do.

  If the third information transmission unit 1004 does not transmit uplink data when transmitting the non-periodic channel state information as a result of the determination of the second determination unit 1003, the third information transmission unit 1004 uses the resource used by the base station that is not used. Send periodic channel state information.

  When the fourth information transmission unit 1005 transmits not only the non-periodic channel state information but also the uplink data as a result of the determination of the second determination unit 1003, the user apparatus uses the resources used by the base station allocated to the user apparatus. To transmit aperiodic channel state information and uplink data.

  In addition, the user apparatus UE further includes a storage unit (not shown). The said storage unit memorize | stores the correspondence table of instruction information and a downlink component carrier set, and uses for the said user apparatus UE.

  FIG. 11 is a schematic diagram showing the configuration of the second determination unit of FIG. As shown in FIG. 11, the second determination unit 1003 includes a third determination unit 1101, a fourth determination unit 1102, a first determination unit 1103, and a second determination unit 1104.

  The third determination unit 1101 determines whether the number of related downlink component carriers is one or more.

  The fourth determination unit 1102 sets the coded modulation scheme index number included in the downlink control information in advance when the number of related downlink component carriers is one as a result of the determination by the third determination unit 1101. And whether the resource to be used is equal to or less than a predetermined first numerical value; and, as a result of the determination by the third determination unit 1101, the number of related downlink component carriers is one or more. In some cases, it is further determined whether the coded modulation scheme index number included in the downlink control information is a preset index number and whether the resource to be used is equal to or smaller than a predetermined second numerical value; The second number is greater than the first number; and the first and second numbers based on the channel coding rate Determined.

  If the determination result of the fourth determination unit 1102 is “Yes”, the first determination unit 1103 determines not to transmit uplink data when transmitting the aperiodic channel state information.

  If the determination result of the fourth determination unit 1102 is “No”, the second determination unit 1104 determines that uplink data is also transmitted when transmitting the aperiodic channel state information.

  Here, the user apparatus UE can report the aperiodic channel state information CSI through the uplink control information UCI. The uplink control information UCI is transmitted to the base station through the physical uplink shared channel PUSCH. For each functional unit in the second information transmission unit 902, the method described with reference to FIGS. 7 and 8 in the fifth embodiment can be adopted, and thus detailed description thereof is omitted here.

  As is clear from the above-described embodiment, the user apparatus UE can determine the number of related downlink component carriers CC based on the received instruction information. Thereby, transmission of aperiodic channel state information can be determined based on the number of the downlink component carriers CC, the modulation and coding scheme, and the resources to be used. Since this method can be applied to transmission of uplink control information in the case of multicarrier, it can guarantee accuracy when the base station receives uplink control information, and can restrict scheduling for data transmission of the base station. Can be reduced.

  The above embodiment can be applied to the LTE-A system. Hereinafter, the aperiodic channel state information CSI is reported through the uplink control information UCI, the modulation and coding scheme index number MCS = 29, and one downlink component carrier. Implementation of the present invention when the number of resources used in CC, that is, the first numerical value L1 is 4 RBs or less, and the number of resources used in two downlink component carriers CC, that is, the second numerical value L2 is 5 or less An explanation will be given as an example.

  FIG. 12 is a flowchart illustrating a transmission method of uplink control information on the base station side according to the seventh embodiment of the present invention. As shown in FIG. 12, the method includes steps 1201 to 1205.

  In Step 1201, the base station assigns a set of a plurality of sets of related downlink component carriers CC to the user apparatus UE, and holds the instruction information and a set of the sets of related downlink component carriers CC in association with each other.

  As shown in Table 6 or Table 7, in the embodiment of the present invention, Table 6 will be described as an example.

  In Step 1202, when the base station determines that the user apparatus UE needs to report the aperiodic CSI in the related downlink component carrier CC, for example, in the downlink component carriers 1 and 2 When it is determined that the aperiodic CSI needs to be reported, the base station generates a corresponding DCI source bit in consideration of the transmission mode and the system requirements. Since the existing technology can be adopted for the process to generate, detailed description is omitted here.

  Here, the DCI can include the instruction information “11”, and can be transmitted by adopting the CQI request in DCI format 0 or 4. Further, MCS = 29 and the number of resources L2 = 5.

  In step 1203, the base station adds a cyclic redundancy check code (CRC) to the generated DCI source bits.

  In step 1204, modulation coding and rate matching are performed on the DCI source bits to which CRC is added.

  In Step 1205, a physical control channel PDCCH is generated, mapped to a corresponding physical time frequency resource, and transmitted to the user apparatus UE through the PDCCH.

  FIG. 13: is a flowchart which shows the transmission method of the uplink control information by the user apparatus side of Example 7 of this invention. First, the user apparatus UE detects a possible DCI based on a transmission mode, and then transmits uplink control information UCI including an aperiodic CSI based on the detected DCI, and an uplink including an aperiodic CSI. Determine whether to send only control information UCI. As shown in FIG. 13, the method specifically includes steps 1301 to 1311.

  In Step 1301, the user apparatus UE receives the PDCCH using the corresponding time frequency resource, and receives the downlink control information DCI.

  In Step 1302, rate dematching and demodulation decoding are performed on the downlink control information DCI.

  In step 1303, it is determined whether the CRC check is correct; if the result of the determination is “correct”, step 1304 is executed; otherwise, step 1308 is executed.

  In step 1304, if the CRC check is correct as a result of the determination in step 1303, the aperiodic channel state is determined based on the read instruction information in the downlink control information DCI, the MSC index number, and the resource to be used. It is further determined whether to transmit the uplink control information UCI including the information CSI; if the determination result is “transmit”, step 1305 is executed; otherwise, step 1310 is executed.

  Here, “11” indicates that uplink control information UCI including aperiodic channel state information CSI of downlink component carriers having index numbers 1 and 2 is transmitted.

  In step 1305, if the result of determination in step 1304 is “correct”, the number of downlink component carriers CC is further determined.

  As is clear from the above, the number of downlink component carriers is two.

  In step 1306, the user apparatus UE further determines whether the MCS is equal to 29 and the resource RB to be used is 5 or less based on the number CC of downlink component carriers; If “yes”, step 1306 is executed; otherwise, step 1311 is executed.

  In this embodiment, since L2 = 5 and the MCS index number is 29, the determination result is “Yes”.

  In Step 1307, if the result of the determination in Step 1305 is “Yes”, the user apparatus UE uses the resource that is used by the base station allocated to the user apparatus UE within a predetermined period of time. And uplink control information UCI including the non-periodic CSI is transmitted, and uplink data is not transmitted.

  In step 1308, if the CRC check is incorrect in step 1303, it is determined whether the maximum number of times of blind detection has been exceeded. If the result of the determination is “yes”, step 1309 is executed, otherwise the process returns to step 1301.

  In step 1309, if the result of determination in step 1308 is "Yes", the PDCCH is discarded and the process ends.

  In Step 1310, if the result of the determination in Step 1304 is “No”, only the uplink data is transmitted through the PUSCH, and then the process ends (not shown).

  In Step 1311, if the result of the determination in Step 1306 is “No”, uplink control information UCI including uplink data and the aperiodic channel state information CSI is transmitted through PUSCH.

  Here, the uplink control information UCI including the aperiodic CSI can be transmitted to the base station through the PUSCH together with the uplink data by a multiplexing method. That is, a part of the resource of the uplink data is used when transmitting the uplink control information of the aperiodic CSI. Moreover, it is not necessary to instruct | indicate separately this resource via a signal, The said user apparatus UE and a base station may promise beforehand as the resource used under this condition.

  In the above embodiment, a plurality of downlink component carriers have been described as an example. If there is one downlink component carrier, the judgment condition in step 1306 is a judgment as to whether MCS = 29 and RB is L1 = 4 or less, and the other processes are similar to those in FIG. Detailed description will be omitted.

  According to an embodiment of the present invention, a computer readable program is provided. Here, when the program is executed at the base station, the program causes the computer to execute the resource allocation method according to the first embodiment at the base station.

  According to an embodiment of the present invention, a recording medium storing a computer-readable program is provided. Here, the computer-readable program causes the computer to execute the resource allocation method of the first embodiment at the base station.

  According to an embodiment of the present invention, a computer readable program is provided. Here, when the base station executes the program, the program causes the computer to execute the channel state information transmission method of the third or seventh embodiment in the base station.

  According to an embodiment of the present invention, a recording medium storing a computer-readable program is provided. Here, the computer readable program causes the computer to execute the channel state information transmission method of the third or seventh embodiment at the base station.

  According to an embodiment of the present invention, a computer readable program is provided. Here, when the user apparatus executes the program, the program causes the computer to execute the channel state information transmission method according to the fourth or seventh embodiment.

  According to an embodiment of the present invention, a recording medium storing a computer-readable program is provided. Here, the computer-readable program causes the computer to execute the channel state information transmission method according to the fourth or seventh embodiment on the user device.

  As is clear from the above-described embodiments, the base station can allocate resources corresponding to the user apparatus based on the number of downlink component carriers, and therefore can allocate resources flexibly. In addition, it is possible to support transmission of uplink control information including multi-carrier non-periodic channel state information, increase the accuracy with which the base station receives the uplink control information, and reduce scheduling restrictions on data transmission of the base station. it can.

  The above-described apparatus and method of the present invention can be realized by heartware, and can also be realized by a combination of heartware and software. Further, the present invention relates to a computer-readable program, and when the program is executed by a logic component, the logic component can realize the above-described device or component, and the logic component can execute each of the above-described methods or Steps can be realized. The present invention relates to a recording medium for recording the program, and includes, for example, a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, and the like.

  Although the present invention has been described above with reference to specific embodiments, those skilled in the art understand that these descriptions are illustrative and do not limit the protection scope of the present invention. It is where it is done. Moreover, those skilled in the art can make various changes and modifications to the present invention based on the spirit and principle of the present invention, and these changes and modifications are also included in the scope of the present invention.

Claims (12)

A transmission unit for transmitting control information instructing a user apparatus to perform aperiodic reporting of channel state information of a downlink component carrier;
A resource allocation unit that allocates resources to the user equipment according to the number of downlink component carriers,
The resource allocation unit is:
When instructing the user apparatus to perform aperiodic reporting of channel state information of one downlink component carrier, the user apparatus is assigned a resource number having a predetermined first numerical value as a maximum value,
When instructing the user apparatus to perform aperiodic reporting of channel state information of a plurality of downlink component carriers, the user apparatus is assigned a resource number having a predetermined second numerical value greater than the first numerical value as a maximum value. A base station characterized by that.   The base station according to claim 1, wherein the first numerical value is four.   The base station according to claim 1, wherein the first numerical value and the second numerical value are determined based on a channel coding rate. Instructs the user equipment to perform aperiodic reporting of channel state information of the downlink component carrier, and instructs information indicating the index number and number of the downlink component carrier, the index number of the coded modulation scheme, and the user An information generation unit for generating downlink control information including information on resources allocated to the device;
An information transmission unit for transmitting the downlink control information to the user apparatus,
When allocating resources to the user equipment,
When instructing the user apparatus to perform aperiodic reporting of channel state information of one downlink component carrier, the maximum number of resources allocated to the user apparatus is a predetermined first numerical value,
When instructing the user apparatus to perform aperiodic reporting of channel state information of a plurality of downlink component carriers, the maximum number of resources allocated to the user apparatus is a predetermined second numerical value greater than the first numerical value. Feature base station.   The base station according to claim 4, wherein the first numerical value is four.   The base station according to claim 4, wherein the first numerical value and the second numerical value are determined based on a channel coding rate. A user device,
Instructs the user equipment to perform aperiodic reporting of the channel state information of the downlink component carrier transmitted from the base station, and instructs information indicating the index number and number of the downlink component carrier, and coded modulation A receiving unit for receiving downlink control information including an index number of the scheme and information of the allocated resource;
A transmission unit that transmits the channel state information to the base station based on an indication of the aperiodic report of the channel state information, and
When the base station instructs the user apparatus to perform aperiodic reporting of channel state information of one downlink component carrier, the maximum number of resources allocated to the user apparatus is a predetermined first numerical value,
When the base station instructs the user apparatus to perform aperiodic reporting of channel state information of a plurality of downlink component carriers, the maximum number of resources allocated to the user apparatus is a predetermined second numerical value greater than the first numerical value. The user apparatus characterized by the above-mentioned.   The user apparatus according to claim 7, wherein the first numerical value is four.   The user apparatus according to claim 7, wherein the first numerical value and the second numerical value are determined by the base station based on a channel coding rate. A user device,
A receiving unit for receiving control information including instruction information for instructing the user apparatus to perform aperiodic reporting of channel state information of downlink component carriers transmitted from a base station, and information on allocated resources;
A transmission unit that transmits the channel state information to the base station based on an indication of the aperiodic report of the channel state information, and
When an aperiodic report of channel state information of one downlink component carrier is instructed, a resource number having a predetermined first numerical value as a maximum value is allocated,
A user is assigned a number of resources whose maximum value is a predetermined second numerical value larger than the first numerical value when aperiodic reporting of channel state information of a plurality of downlink component carriers is instructed. apparatus.   The user apparatus according to claim 10, wherein the first numerical value is four. The user apparatus according to claim 10, wherein the first numerical value and the second numerical value are determined by the base station based on a channel coding rate.

Images