JP2019092046A - User equipment, base station, information notification method, and information reception method - Google Patents

Abstract

To reduce a signal amount in user equipment notifying a base station of band combination capability in a radio communication system that performs carrier aggregation or dual connectivity.SOLUTION: User equipment in a radio communication system handling communication by a plurality of cells includes: a generation unit for generating band combination information showing band combinations available for communication by the plurality of cells in the user equipment; and a transmission unit for transmitting the generated band combination information to a base station. The generation unit generates band combination information in which a band combination having the number of CCs smaller than the number of CCs in each band combination is excluded from respective band combinations included in the predetermined plurality of band combinations. The plurality of cells includes at least one NR cell and the generated band combination information includes at least one band corresponding to the NR cell.SELECTED DRAWING: Figure 50

Description

  The present invention relates to a technology in which a user apparatus UE in a wireless communication system such as LTE notifies its base station eNB of its own capability information.

  In LTE-Advanced, multiple carriers are simultaneously used as a basic unit, with LTE supported bandwidth (up to 20 MHz) as the basic unit, in order to realize throughput higher than LTE while maintaining backward compatibility with LTE. Carrier aggregation (CA: Carrier Aggregation) that communicates is adopted. A carrier that is a basic unit in carrier aggregation is called a component carrier (CC: Component Carrier).

  Carrier aggregation is classified into three scenarios as shown in FIG. 1 (A), FIG. 1 (B) and FIG. 1 (C) according to the frequency allocation of CC. FIG. 1 (A) is Intra-band contiguous CA, which is a scenario in which continuous CCs are arranged in a band. This scenario is applied, for example, when broadband assignment such as 3.5 GHz band is performed. FIG. 1B is an inter-band non-contiguous CA, which is a scenario in which a plurality of CCs of different bands are arranged. This scenario is applied, for example, when communication is performed using a plurality of carriers such as 2 GHz band and 1.5 GHz band. FIG. 1C is a scenario in which non-continuous CCs are arranged in the same band, which is Intra-band non-contiguous CA. This scenario is applied, for example, when the assignment of frequency bands to the operator is fractional.

  On the other hand, in the LTE (including LTE-Advanced) system, for example, when connecting to a network, the user apparatus UE uses its own capability (Capability) as the base station eNB with a predetermined signaling message (UE-EUTRA-Capability). It is prescribed to notify (Non-Patent Document 1).

  In addition, in 3GPP (3rd Generation Partnership Project), 5G or NR (New Radio) is implemented to realize further increase in system capacity, further increase in data transmission speed, and further reduction in delay in a wireless section. A study on a wireless communication system (hereinafter, the wireless communication system is referred to as "NR") is being advanced. In NR, in order to meet the requirement of reducing the delay of the wireless section to 1 ms or less while achieving a throughput of 10 Gbps or more, various wireless technologies are being studied.

  In NR, a base station apparatus (eNB: evolved NodeB) that configures a long term evolution (LTE) cell using a technology called dual connectivity in which a plurality of base station apparatuses and user apparatuses communicate. It is considered that a user apparatus is connected to a base station apparatus (gNB: next generation node B) configuring an NR cell (for example, non-patent document 2).

3GPP TS 36.331 V14.3.0 (2017-06) 3GPP TS 23.401 V 15.0.0 (2017-06) 3GPP TS 36.101 V14.4.0 (2017-06)

  In the notification of the above-mentioned capability information, the user apparatus UE notifies the base station eNB of a combination of bands supported by itself (CA band combination, CA band combination). Moreover, when the user apparatus UE can respond to multiple types of CA band combinations, the current situation is defined such that the user apparatus UE notifies the base station eNB of the patterns of all the corresponding CA band combinations.

  Therefore, in the related art, the user apparatus UE has to notify all CA band combinations to which the user apparatus UE itself corresponds, and as the number of CCs to be bundled increases, the number of CA band combinations to notify increases. Rel. In 13 LTEs, in order to realize more flexible and high-speed wireless communication, a CA that bundles up to 32 CCs is being considered. Therefore, if the prior art is applied as it is, the number of CA band combinations to be notified becomes enormous, and the amount of signals (the amount of information) for signaling also becomes enormous.

  Further, even in a DC where a user apparatus communicates with a plurality of base stations including NR base stations, the number of band combinations to be notified regarding notification of band combinations which is a combination of supported bands is the same as CA band combinations. There is a problem that the amount of signaling (the amount of information) for signaling becomes enormous.

  The present invention has been made in view of the above, and provides a technique for reducing the amount of signal when a user apparatus notifies a base station of the capability of band combination in a radio communication system performing carrier aggregation or dual connectivity. The purpose is to

  According to an embodiment of the present invention, there is provided a user apparatus that communicates with a base station in a wireless communication system supporting communication by a plurality of cells, and shows a band combination usable for communication by a plurality of cells in the user apparatus. A generation unit configured to generate band combination information; and a transmission unit configured to transmit the generated band combination information to a base station, wherein the generation unit is configured to transmit each of the plurality of band combinations included in a predetermined plurality of band combinations from the base station. When it is requested to exclude the report of the band combination whose number of CCs is smaller than the number of CCs in each of the above-mentioned band combinations among the band combinations of the above, among the respective band combinations included in the predetermined plurality of band combinations A band combination having a number of CCs smaller than the number of CCs in each of the band combinations A user apparatus is provided that generates excluded band combination information, the plurality of cells include at least one cell of NR, and the generated band combination information includes at least one band corresponding to the cell of NR. Ru.

  According to the embodiment of the present invention, it is possible to reduce the amount of signal when the user apparatus notifies the base station of the capability of band combination in a radio communication system performing carrier aggregation or dual connectivity.

It is a figure which shows the example of frequency allocation of a carrier aggregation. It is a figure which shows the structural example of the message which notifies CA band combination information. It is a figure for demonstrating the various parameters in CA band combination. It is a table showing CA-BandwidthClass. It is a figure which shows the specific example of the signaling message which notifies CA band combination information. It is a figure which shows the information notified as CA band combination, when the user apparatus UE respond | corresponds to 3DL / 3UL CA at maximum. It is a figure which shows the example of the number of MIMO layers notified per band in CA band combination. It is a block diagram of the radio | wireless communications system which concerns on embodiment of this invention. It is a figure for demonstrating an example about all 19 types of CA band combinations which make 3DL / 3UL the highest. It is a figure for demonstrating the specific example of CA band combination from which a parameter differs. It is a function block diagram of the user apparatus UE which concerns on embodiment of this invention. It is a functional block diagram of the base station eNB which concerns on embodiment of this invention. It is a hardware block diagram of the user apparatus UE and base station eNB which concern on embodiment of this invention. It is a sequence diagram which shows operation | movement of the radio | wireless communications system which concerns on embodiment of this invention. It is a figure which shows an example of a UECapabilityEnquiry message. It is a flowchart which shows the process sequence which produces | generates CA band combination information. It is a figure which shows an example of UE-EUTRA-Capability Intormation Element. It is a figure which shows an example of UE-EUTRA-Capability Intormation Element. It is an explanation of processing procedure which generates CA band combination information. It is a sequence diagram which shows the notification method of CA band combination prescribed | regulated by 3GPP. FIG. 10 is a sequence diagram showing an operation of a wireless communication system according to a modification 1; It is a figure which shows the example of a specification change which shows operation | movement of the RRC layer which concerns on the modification 1. FIG. It is a figure which shows the example of a specification change of UECapabilityEnquiry which concerns on the modification 1. FIG. It is a figure which shows the example of a specification change of UECapabilityEnquiry which concerns on the modification 1. FIG. It is a figure which shows the example change example (the 1) of specification of UE-EUTRA-Capability which concerns on the modification 1. FIG. It is a figure which shows the example of a specification change of UECapablityInformation which concerns on the modification 1. FIG. It is a figure which shows the example change example (the 2) of specification of UE-EUTRA-Capability which concerns on the modification 1. FIG. FIG. 16 is a sequence diagram for describing an example of a UE capability notification operation according to a second modification. It is a flowchart for demonstrating the example of UE capability notification which concerns on modification 2. FIG. FIG. 16 is a diagram illustrating an example of a UE capability notification operation according to a second modification. It is a figure which shows the example (1) of the message of UE capability notification operation | movement which concerns on the modification 2. FIG. It is a figure which shows the example (2) of the message of UE capability notification operation | movement which concerns on the modification 2. FIG. It is a figure which shows the example (3) of the message of UE capability notification operation | movement which concerns on the modification 2. FIG. FIG. 16 is a sequence diagram for explaining an example of a UE capability notification operation according to a modification 3; It is a flowchart for demonstrating the example of UE capability notification which concerns on the modification 3. FIG. FIG. 16 is a diagram illustrating an example of a UE capability notification operation according to a modification 3; It is a figure which shows the example (1) of the message of UE capability notification operation | movement which concerns on the modification 3. FIG. It is a figure which shows the example (2) of the message of UE capability notification operation | movement which concerns on the modification 3. FIG. It is a figure which shows the example (3) of the message of UE capability notification operation | movement which concerns on the modification 3. FIG. It is a figure which shows the example (4) of the message of UE capability notification operation | movement which concerns on the modification 3. FIG. It is a figure which shows the example (5) of the message of UE capability notification operation | movement which concerns on the modification 3. FIG. It is a figure which shows the example (6) of the message of UE capability notification operation | movement which concerns on the modification 3. FIG. It is a figure which shows the example (7) of the message of UE capability notification operation | movement which concerns on the modification 3. FIG. FIG. 16 is a sequence diagram for explaining an example of a UE capability notification operation according to a modification 4; FIG. 16 is a flowchart for describing an example of a UE capability notification operation according to a modification 4; FIG. 16 is a diagram illustrating an example of a UE capability notification operation according to a modification 4; It is a figure which shows the example (1) of the message of UE capability notification operation | movement which concerns on the modification 4. FIG. It is a figure which shows the example (2) of the message of UE capability notification operation | movement which concerns on the modification 4. FIG. It is a figure which shows the example (3) of the message of UE capability notification operation | movement which concerns on the modification 4. FIG. FIG. 16 is a sequence diagram for explaining an example of a UE capability notification operation according to a fifth modification; It is a flowchart for demonstrating the example (1) of UE capability notification operation | movement which concerns on the modification 5. FIG. It is a figure which shows the example (1) of UE capability notification operation | movement which concerns on the modification 5. FIG. It is a figure which shows the example (1) of the message of UE capability notification operation | movement which concerns on the modification 5. FIG. It is a figure which shows the example (2) of the message of UE capability notification operation | movement which concerns on the modification 5. FIG. It is a figure which shows the example (3) of the message of UE capability notification operation | movement which concerns on the modification 5. FIG. It is a figure which shows the example (4) of the message of UE capability notification operation | movement which concerns on the modification 5. FIG. It is a figure which shows the example (5) of the message of UE capability notification operation | movement which concerns on the modification 5. FIG. It is a figure which shows the example (6) of the message of UE capability notification operation | movement which concerns on the modification 5. FIG. It is a figure which shows the example (7) of the message of UE capability notification operation | movement which concerns on the modification 5. FIG. It is a figure which shows the example (8) of the message of UE capability notification operation | movement which concerns on the modification 5. FIG. It is a figure which shows the example (9) of the message of UE capability notification operation | movement which concerns on the modification 5. FIG. It is a figure which shows the example (10) of the message of UE capability notification operation | movement which concerns on the modification 5. FIG. It is a flowchart for demonstrating the example (2) of UE capability notification operation | movement which concerns on the modification 5. FIG. It is a figure which shows the example (2) of UE capability notification operation | movement which concerns on the modification 5. FIG. It is a figure which shows the example (11) of the message of UE capability notification operation | movement which concerns on the modification 5. FIG. It is a figure which shows the example (1) of Fallback BPC which concerns on the modification 5. FIG. It is a figure which shows the example (1) of the message of Fallback BPC which concerns on the modification 5. FIG. It is a figure which shows the example (2) of the message of Fallback BPC which concerns on the modification 5. FIG. It is a figure which shows the example (2) of Fallback BPC which concerns on the modification 5. FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the embodiments described below are merely examples, and the embodiments to which the present invention is applied are not limited to the following embodiments. For example, the communication system according to the present embodiment is assumed to be compatible with LTE including LTE-Advanced, but the present invention is not limited to LTE, and may be applied to other schemes for performing CA. . Hereinafter, “LTE” is used in a meaning including LTE-Advanced unless otherwise specified.

<System overall configuration, operation example>
FIG. 8 shows a configuration diagram of a wireless communication system according to the embodiment of the present invention. The communication system according to the present embodiment is a communication system according to the LTE scheme, and as shown in FIG. 8, includes a user apparatus UE and a base station eNB. The user apparatus UE and the base station eNB can perform CA. Although one user apparatus UE and one base station eNB are illustrated in FIG. 8, this is an example, and a plurality of each may be provided. Moreover, the user apparatus UE may be equipped with the capability (DC) which communicates simultaneously with several base station eNB.

  In the present embodiment, the user apparatus UE transmits CA band combination information indicating a combination of bands that can be supported for the base station eNB. In the following description, “CA band combination” and “fallback band combination” are mainly used when an intended combination of bands is intended, and “information showing a CA band combination” is mainly intended when information carried in a message is intended. And “information indicating fallback band combination” or the like.

  In the present embodiment, when the user apparatus UE corresponds to all of a certain CA band combination and its fallback band combination, the user apparatus UE omits the notification of information indicating the fallback band combination and Only the information indicating the upper CA band combination is notified. Also, with regard to various parameters (FIG. 3) in the CA band combination, notification is given on various parameters in only the highest CA band combination.

  The highest CA band combination means a CA band combination having the largest number of CCs to be combined in both UL and DL among all the CA band combinations that the user apparatus UE can support.

  When the base station eNB receives information indicating a certain CA band combination from the user apparatus UE and receives no information indicating a fallback band combination of the CA band combination, the user apparatus UE is configured to: With the received CA band combination, it is determined that all fallback band combinations are also supported.

  In addition, when the user apparatus UE supports Intra-band contiguous CA, and the user apparatus UE supports the upper CA bandwidthclass, in the present embodiment, the user apparatus UE also supports all the lower CA bandwidthclasses. To be considered as Specifically, when the user apparatus UE corresponds to all of the CA bandwidthclasses of "A to F" in a predetermined frequency band, the user apparatus UE sets "F" in the CA bandwidthclass related to the predetermined band in the CA band combination. Notice. The base station eNB determines that the user apparatus UE is compatible with all of the CA bandwidthclasses “A” to “F” in a predetermined band.

  Subsequently, when the user apparatus UE corresponds to a certain highest-order CA band combination but does not correspond to some of the fallback band combinations among all the fallback band combinations, in the present embodiment, The user apparatus UE notifies the base station eNB of an unsupported fallback band combination in addition to the highest CA band combination.

  When the base station eNB receives, from the user apparatus UE, information indicating a certain CA band combination and receives information indicating an unsupported CA band combination, the base station eNB, together with the received CA band combination, Of all the fallback band combinations, it is determined that all fallback band combinations other than the unsupported fallback band combination are supported.

  Furthermore, even when the user apparatus UE corresponds to all of a certain CA band combination and its fallback band combination, it is different from various parameters in the highest CA band combination in some fallback band combinations. It is assumed that there is a fallback band combination with parameters (ie, there is a difference in parameters with the top CA band combination). In this case, the user apparatus UE is notified of information indicating a fallback band combination in which only different parameters among various parameters are set. The base station eNB that has received the information indicating the fallback band combination in which only different parameters are set is determined to be identical to the highest-order CA band combination for the parameters not notified in the fallback band combination. .

  With the above configuration, the invention described in the present embodiment has an effect of reducing the signaling related to the terminal capability notification as compared with the conventional example. As an example of signaling, a structural example of a message for notifying a CA band combination is shown in FIG. As shown in FIG. 2, in the message, various parameters can be notified per UL / DL individually for each CA band combination, and further, various parameters can be notified per band in the CA band combination. FIG. 3A shows an example of parameters that can be set for each CA band combination, and FIG. 3B shows an example of parameters that can be notified for each band in the CA band combination. For example, “dc-Support” is a parameter indicating that the user device corresponds to Dual Connectivity (hereinafter referred to as “DC”). “SupportCSI-Proc” is a parameter indicating the number of CSI (Channel State Information) processes that can be supported by the user apparatus. “CA bandwidthclass” is a parameter indicating a bandwidth class (per UL / DL) that can be supported by the user apparatus. The supported MIMO-Capability is a parameter indicating the number of MIMO layers (per UL / DL) that the user apparatus can support.

  The number of CSI processes is the maximum number of processes that can be operated when calculating CSI in the user equipment, and is used when reporting CSI to a base station for coordinated multi-point (CoMP).

  The CA bandwidthclass is a class defined by the table (non-patent document 3) in FIG. 4, and indicates, for each frequency band, a bandwidth that can be aggregated by the user apparatus UE and the number of CCs. For example, if the maximum number of CCs in each band is 1, the maximum bandwidth that can be aggregated is 100 RB, and the inter-band CA is 2 CC in the frequency bands 2 GHz (Band 1) and 1.5 GHz (Band 21), 1A_21A And is described on the standard specifications.

  FIG. 5 shows a specific example of a signaling message for notifying a CA band combination. FIG. 5 shows one signaling message in total. The example shown in FIG. 5 is a 2G + 1.5G downlink CA only, and is an example in which the capability to perform downlink 2x2 MIMO is notified. In the example shown in FIG. 5, four types of patterns are notified from the pattern of performing downlink CA in two bands to the pattern used by 1.5 G alone.

  The CA band combination notified when the user apparatus UE supports up to 3DL / 3UL CA is shown in FIG. The four CA band combinations (BandCombinationParameters-r10) shown in FIG. 5 are, in order from the top, "No. 13", "No. 14", "No. 18", and "No. 19" in FIG. It corresponds.

  Here, a band combination lower than 3DL / 3UL (the number of CCs in either or both of DL and UL) lower than the maximum CA capability is called a fallback band combination. In the example of FIG. 6, the user apparatus UE, together with 3DL / 3UL, corresponds to all the fallback band combinations, and thus notifies the base station eNB of a total of 19 CA band combinations. In addition, "A" shown by each band in each CA band combination of FIG. 6 means CA bandwidthclass in the said band. In addition, also when not performing CA (Non-CA, No. 17-19), providing as a subset of CA is prescribed | regulated. Further, as described above, various parameters can be notified in the CA band combination. FIG. 7 illustrates an example of notification of parameters related to the number of MIMO layers, and illustrates the number of MIMO layers that can be supported by the user apparatus in each band for each CA combination.

<Specific example>
As an example, as shown in FIG. 9, a specific example will be described for a set of a total of 19 types of CA band combinations having 3DL / 3UL as the top. In the present embodiment, since a maximum of 32 CCs are bundled and CA is assumed, the uppermost CA band combination is 32DL / 32UL, but the combination pattern becomes enormous, so for convenience of illustration, 3DL / 3UL. It demonstrates using the set of CA band combination which makes the top the highest rank.

  In addition, it is assumed that the user apparatus UE corresponds to all 19 types of CA band combinations, and various parameters (presence or absence of DC compatibility, number of MIMO layers, number of CSI processes, etc.) in each CA band combination are the same.

  In this case, the user apparatus UE in the present embodiment has No. 1 indicated by X in FIG. No. 1 CA band combination (i.e., the top CA band combination) and No. 1 combination. The base station eNB is notified of CA band combination information in which only various parameters in the CA band combination of No. 1 are set, and No. 1 which is a fallback band combination of the CA band combination of No. 1. No notification is given for 2-19.

  As mentioned above, no. No. 1 of 1-19. The base station eNB that receives the information of only the CA band combination of 1 from the user apparatus UE is No. 1 in the user apparatus UE. It is determined that all of 1 to 19 are supported. Also, no. As for various parameters in the CA band combination of 2 to 19, no. It is determined that it is the same as various parameters included in the CA band combination information of 1.

  On the other hand, the user apparatus UE indicates No. 1 in the CA band combination shown in FIG. When it does not correspond to 6, 10 (Y, Z of FIG. It transmits to the base station eNB CA band combination information indicating that it does not correspond to 6 and 10.

  In this case, the base station eNB is No. No. 1 in addition to the CA band combination information. Since the CA band combination information indicating that it does not correspond to 6 and 10 is received, as described above, the base station eNB causes the user apparatus UE to fall back to the highest CA band combination (No. 1) No. 1 which is a band combination. 2-No. No. 19 fallback band combinations. It is judged that it corresponds to the fallback band combination other than 6 and 10.

  Furthermore, the fallback band combination in which the user apparatus UE has parameters different from various parameters in the top CA band combination in some of the fallback band combinations among all the fallback band combinations of the top CA band combination. A specific example in the case where there exists will be described. For example, as shown in FIG. 10, the user apparatus UE supports two layers of MIMO at 800M, 1.5G, and 2G in the highest CA band combination, respectively, but NO. The fallback band combination of 2 supports 4 layers of MIMO at 1.5 G, and NO. In the fallback band combination of 4, it is assumed that 2G supports 4 layers of MIMO.

  The user apparatus UE sets NO. Of the bands in No. 2, 1.5 G supports four layers of MIMO, and NO. The information which shows the fallback band combination with which the parameter which shows that 2 G supports 4 layer MIMO among each band in 4 is transmitted to a base station eNB further. In the information indicating the fallback band combination, NO. Of each band in 2, supporting two layers of MIMO at 800 M, and NO. Among the bands in 4, the parameter indicating that 800 M supports 2-layer MIMO is not set.

  In this case, the base station eNB is No. In addition to the information indicating the CA band combination of No. 1, NO. Of the bands in No. 2, 1.5 G supports four layers of MIMO, and NO. Among the bands in 4, the information indicating the fallback band combination in which the parameter indicating that 2G supports 4 layers of MIMO is set is received. The base station eNB is No. 1 in the user apparatus UE. While judging that it corresponds to all of 1-19, No. No. 2 corresponds to 4 layers of MIMO with 1.5 G in No. 2. No. 4 corresponds to 4 layers of MIMO with 2G in No. 4, and other parameters. It is judged that it is the same as various parameters in 1.

  Note that the notification methods described above can be combined. That is, the user apparatus UE has no. No. 1 in addition to the information indicating the CA band combination. Information indicating a fallback band combination indicating that it does not correspond to 6, 10, and NO. Of the bands in No. 2, 1.5 G supports four layers of MIMO, and NO. It is also possible to transmit information indicating a fallback band combination in which a parameter indicating that 2G supports 4 layers of MIMO among the bands in 4 is set.

  In this case, the base station eNB indicates that the user apparatus UE is the highest CA band combination (No. 1) and No. 1 of the fallback band combinations (No. 2 to No. 19). In addition to being compatible with fallback band combinations other than 6 and 10, No. No. 2 corresponds to 4 layers of MIMO with 1.5 G in No. 2. No.4 corresponds to 4 layers of MIMOI with 2G in No.4. It is judged that it is the same as various parameters in 1.

  As mentioned above, although the user apparatus UE notified the highest CA band combination according to the capability of the self, it can also be filtered and notified by the several band instruct | indicated from the base station eNB. For example, when instructed by the base station eNB to notify only the combination of CA bands that can be combined at 800M and 1.5G, the user apparatus UE may select a combination of CA bands that can be combined at 800M and 1.5G, The highest CA band combination, the non-corresponding fallback band combination, and the fallback band combination with a parameter difference may be notified.

  The base station eNB that has received the CA band combination information then determines which CA combination to apply from the CA combinations supported by the user apparatus UE based on, for example, the communication quality for each CC of the user apparatus UE. And perform operations such as notifying (configuring) the determined CA combination to the user apparatus UE.

  In order to perform such an operation, the base station eNB holds a table (for example, FIG. 9) including the CA band combination and its fallback band combination, for example, for each highest CA band combination. Here, the highest CA band combination and its fallback band combination may have any content as long as it is determined to be uniquely determined between the user apparatus UE and the base station eNB. For example, the top CA combination No. shown in FIG. The fallback band combination (No. 2 to No. 19) of No. 1 is uniquely determined in the communication system, and the base station eNB is the top CA combination No. 1. The fallback band combination (No. 2 to No. 19) corresponding to 1 is grasped.

<Functional configuration>
(User device)
FIG. 11 shows a functional configuration diagram of the user apparatus UE in the present embodiment. As shown in FIG. 11, the user apparatus UE includes a DL signal reception unit 101, a UL signal transmission unit 102, a UE capability information storage unit 103, and a generation unit 104. Note that FIG. 11 shows only the functional units particularly related to the present invention in the user apparatus UE, and also has at least a function (not shown) for performing operations compliant with LTE.

  The DL signal reception unit 101 includes a function of receiving various downlink signals from the base station eNB and acquiring higher layer information from the received physical layer signal, and the UL signal transmission unit 102 receives the information from the user apparatus UE It includes a function of generating various signals of the physical layer from the information of the upper layer to be transmitted and transmitting the signals to the base station eNB.

  The UE capability information storage unit 103 stores UE capability information including a CA band combination supported by the user apparatus UE itself and various parameters in the CA band combination.

  When transmitting the CA band combination information to the base station eNB, the generation unit 104 refers to the UE capability information storage unit 103 and determines that the highest CA band combination, a non-support fallback band combination, and a fallback with a parameter difference. Generate CA band combination information indicating band combination. Also, the generation unit 104 instructs the UL signal transmission unit 102 to transmit the generated CA band combination information to the base station eNB.

  In addition, when a plurality of bands supported by the base station eNB are notified from the base station eNB, the generation unit 104 determines that the highest CA band combination among the plurality of bands and the non-support fallback band combination. Alternatively, CA band combination information indicating a fallback band combination having a parameter difference may be generated.

  Also, the generation unit 104 may switch the format of the CA band combination information according to an instruction from the base station eNB. For example, when the base station eNB does not correspond to the CA band combination information of the format in the present embodiment, the CA band combination information may be generated according to the format of the conventional CA band combination information.

(base station)
FIG. 12 shows a functional configuration diagram of a base station eNB in the present embodiment. As shown in FIG. 12, the base station eNB has a DL signal transmission unit 201, a UL signal reception unit 202, a CA band combination information storage unit 203, and a UE capability determination unit 204. Note that FIG. 12 shows only the functional units particularly related to the embodiment of the present invention in the base station eNB, and also has at least a function (not shown) for performing an operation based on the LTE system.

  The DL signal transmission unit 201 includes a function of generating various signals of the physical layer from the information of the upper layer to be transmitted from the base station eNB, and transmitting the generated signals to the user apparatus UE. The UL signal reception unit 202 includes a function of receiving various uplink signals from the user apparatus UE, and acquiring higher layer information from the received physical layer signal.

  The CA band combination information storage unit 203 stores table information including the top CA band combination and all of the fallback band combinations. For example, table information as shown in FIG. 9 is stored.

  The UE capability determination unit 204, based on the CA band combination information received from the user apparatus UE, a CA band combination (including a fallback band combination) supported by the user apparatus UE and various parameters supported by the user apparatus UE. judge.

<Hardware configuration>
The block diagrams (FIGS. 11 and 12) used in the description of the functional configuration show blocks of functional units. These functional blocks (components) are realized by any combination of hardware and / or software. Moreover, the implementation means of each functional block is not particularly limited. That is, each functional block may be realized by one physically and / or logically coupled device, or directly and / or indirectly two or more physically and / or logically separated devices. It may be connected by (for example, wired and / or wireless) and realized by the plurality of devices.

  For example, the user apparatus UE and the base station eNB in the embodiment of the present invention may function as a computer that performs the processing of the information notification method or the information reception method of the present invention. FIG. 13 is a diagram showing a hardware configuration of the user apparatus UE and the base station eNB according to the embodiment of the present invention. The above-described user apparatus UE and base station eNB may be physically configured as a computer apparatus including a processor 1001, a memory 1002, a storage 1003, a communication apparatus 1004, an input apparatus 1005, an output apparatus 1006, a bus 1007 and the like. .

  In the following description, the term "device" can be read as a circuit, a device, a unit, or the like. The hardware configuration of the user apparatus UE and the base station eNB may be configured to include one or more of the devices illustrated in the drawing, or may be configured without including some devices.

  Each function in the user apparatus UE and the base station eNB causes the processor 1001 to perform an operation by reading predetermined software (program) on hardware such as the processor 1001, the memory 1002, and the like, and communication by the communication apparatus 1004, memory 1002 And by controlling the reading and / or writing of data in the storage 1003.

  The processor 1001 operates, for example, an operating system to control the entire computer. The processor 1001 may be configured by a central processing unit (CPU: Central Processing Unit) including an interface with a peripheral device, a control device, an arithmetic device, a register, and the like. For example, the DL signal reception unit 101, the UL signal transmission unit 102, the UE capability information storage unit 103, the generation unit 104, the DL signal transmission unit 201 of the base station eNB, the UL signal reception unit 202 of the user apparatus UE The CA band combination information storage unit 203 and the UE capability determination unit 204 may be realized by the processor 1001.

  Also, the processor 1001 reads a program (program code), a software module or data from the storage 1003 and / or the communication device 1004 to the memory 1002, and executes various processing according to these. As a program, a program that causes a computer to execute at least a part of the operations described in the above embodiments is used. For example, the DL signal reception unit 101, the UL signal transmission unit 102, the UE capability information storage unit 103, the generation unit 104, the DL signal transmission unit 201 of the base station eNB, the UL signal reception unit 202 of the user apparatus UE The CA band combination information storage unit 203 and the UE capability determination unit 204 may be realized by a control program stored in the memory 1002 and operated by the processor 1001, and may be realized similarly for other functional blocks. Good. The various processes described above have been described to be executed by one processor 1001, but may be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. The program may be transmitted from the network via a telecommunication line.

  The memory 1002 is a computer readable recording medium, and includes, for example, at least one of a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), and a RAM (Random Access Memory). It may be done. The memory 1002 may be called a register, a cache, a main memory (main storage device) or the like. The memory 1002 can store a program (program code), a software module, and the like that can be executed to implement the information notification method or the information reception method according to the embodiment of the present invention.

  The storage 1003 is a computer readable recording medium, and for example, an optical disc such as a CD-ROM (Compact Disc ROM), a hard disc drive, a flexible disc, a magneto-optical disc (for example, a compact disc, a digital versatile disc, Blu-ray A (registered trademark) disk, a smart card, a flash memory (for example, a card, a stick, a key drive), a floppy (registered trademark) disk, a magnetic strip, and the like may be used. The storage 1003 may be called an auxiliary storage device. The above-mentioned storage medium may be, for example, a database including the memory 1002 and / or the storage 1003, a server or any other suitable medium.

  The communication device 1004 is hardware (transmission / reception device) for performing communication between computers via a wired and / or wireless network, and is also called, for example, a network device, a network controller, a network card, a communication module, or the like. For example, the DL signal reception unit 101 of the user apparatus UE, the UL signal transmission unit 102, the DL signal transmission unit 201 of the base station eNB, and the UL signal reception unit 202 may be realized by the communication apparatus 1004.

  The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, and the like) that receives an input from the outside. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that performs output to the outside. The input device 1005 and the output device 1006 may be integrated (for example, a touch panel).

  Also, each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured by a single bus or may be configured by different buses among the devices.

  In addition, the user apparatus UE and the base station eNB may be hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), and a field programmable gate array (FPGA). The hardware may be configured, and part or all of each functional block may be realized by the hardware. For example, processor 1001 may be implemented in at least one of these hardware.

<Processing procedure>
(Operation sequence)
FIG. 14 is a sequence diagram showing an operation of the wireless communication system according to the embodiment of the present invention.

  In step S11, the DL signal transmission unit 201 of the base station eNB transmits a capability information request signal to the user apparatus UE. The capability information request signal may be, for example, a "UECapabilityEnquiry message". When the DL signal transmission unit 201 corresponds to the CA band combination information in the present embodiment (hereinafter referred to as “CA band combination information in a new format for the sake of convenience”), the DL signal transmission unit 201 adds a new capability information request signal. Include information indicating that CA band combination information in a specific format is requested. The information may be called, for example, "enhancedCAcapabilityRequest". A specific example of the "UECapabilityEnquiry message" is shown in FIG. Note that the DL signal transmission unit 201 of the base station eNB may include information indicating a plurality of bands supported by the base station eNB in the capability information request signal. Information indicating a plurality of bands supported by the base station eNB is called, for example, “requested Frequency Bands”.

  In step S12, the generation unit 104 of the user apparatus UE generates CA band combination information. If generation unit 104 is requested by the base station eNB for CA band combination information in a new format, and the user apparatus UE itself has the capability of generating CA band combination information in a new format, the generation unit 104 will use the new format. Generate CA band combination information. On the other hand, when generation unit 104 is not requested by the base station eNB for CA band combination information in a new format, or the user apparatus UE itself does not have the ability to generate CA band combination information in a new format. If (or if it can not recognize the information indicating that the CA band combination information in the new format is required), it generates the CA band combination information in the conventional format. Here, the processing procedure when the generation unit 104 generates CA band combination information of a new format will be specifically described.

  FIG. 16 is a flowchart showing a processing procedure for generating CA band combination information. Also, FIG. 17 and FIG. 18 show an example of specific CA band combination information.

  In step S21, the generation unit 104 includes, in the CA band combination information, information indicating the highest CA band combination among the CA band combinations supported by the user apparatus UE itself. The “information indicating the highest CA band combination” may be called “BandCombinationParametersParent” as shown in FIGS. 17 and 18.

  In step S22, the generation unit 104 checks whether there is a fallback band combination that the user apparatus UE does not support, among all fallback band combinations of the highest CA band combination. If there is an unsupported fallback band combination, the process proceeds to step S23. If not, the process proceeds to step S24.

  In step S23, the generation unit 104 includes, in the CA band combination information, information indicating an unsupported fallback band combination. The “information indicating non-correspondence fallback band combination” may be called “non-Supported Band Combination Child” as shown in FIGS. 17 and 18.

  In step S24, the generation unit 104 confirms whether there is a fallback band combination having parameters different from the various parameters in the top CA band combination among the corresponding fallback band combinations. If there is a fallback band combination having parameters different from the various parameters in the top CA band combination, the process proceeds to step S25, and if not, the generation process of CA band combination information is ended.

  In step S25, the generation unit 104 includes, in the CA band combination information, information on a fallback band combination in which only parameters different from the top CA band combination among the various parameters are set. The “information of the fallback band combination in which only the parameter different from the highest CA band combination among the various parameters is set” may be called “supportedBandCombinationChildExt” as shown in FIGS. 17 and 18. In steps S24 and S25, the generation unit 104 sets the top CA among the various parameters in “the information of the fallback band combination in which only the parameters different from the top CA band combination among the various parameters are set”. Instead of setting only parameters different from the band combination, in addition to the different parameters, some parameters (for example, the number of MIMO layers, etc.) are set among the parameters having the same value as the highest CA band combination. It may be included in the band combination information. In steps S24 and S25, generation unit 104 determines all parameters (that is, different parameters and parameters having the same value) for fallback band combinations having parameters different from the top CA band combination among various parameters. Information on fallback band combinations for which all are set may be included in the CA band combination information. This can reduce the possibility that the base station eNB erroneously recognizes the capability of the user apparatus UE.

  Note that, when information indicating a plurality of bands supported by the base station eNB is notified, the generation unit 104 determines the highest CA among the plurality of notified bands in the processing procedure of steps S21 to S25. Information on band combination, information on non-correspondence fallback band combination, and information on fallback band combination in which only parameters different from the highest CA band combination among various parameters are set to be included in the CA band combination information Make it In other words, the generation unit 104 may generate CA band combination information filtered by a plurality of bands notified from the base station eNB. Returning to FIG. 14, the description will be continued.

  In step S13, the UL signal transmission unit 102 of the user apparatus UE transmits the capability information notification signal including the generated CA band combination information to the base station eNB. The capability information notification signal may be, for example, a "UECapabilityInformation message". Based on the CA band combination information included in the received capability information notification signal, the UE capability determination section 204 of the base station eNB supports the CA band combination (including the fallback band combination) supported by the user apparatus UE, and the user apparatus UE Determine the various parameters supported by

  In the case where the UE capability determination unit 204 includes only the information indicating the highest CA band combination in the CA band combination information, the user apparatus UE also determines the fallback band combination along with the highest CA band combination. Judge that all are supported.

  In addition, when the UE capability determination unit 204 includes the information indicating the highest CA band combination and the information indicating the non-correspondence fallback band combination in the CA band combination information, the user equipment UE is the highest rank. It is determined that the fallback band combination other than the non-correspondence fallback band combination among the CA band combination of and all the fallback band combinations is supported.

  In addition, when the information indicating the highest CA band combination and the information of the fallback band combination in which only the parameter different from the highest CA band combination among the various parameters is set are included in the CA band combination information: The UE capability determination unit 204 determines that the user apparatus UE supports all the fallback band combinations as well as the highest CA band combination, and the top for some of the fallback band combinations. It is determined that it corresponds to a parameter different from the CA band combination of

  In addition, fallback in which information indicating the top CA band combination, information indicating the non-correspondence fallback band combination, and various parameters among the various parameters are set to only the parameters different from the top CA band combination in the CA band combination information. When the user equipment UE determines that the user equipment UE is the top CA band combination and all the fallback band combinations, the UE capability determination unit 204 does not support the fallback band combination that is not supported. It is judged that it corresponds to other fallback band combinations, and for some fallback band combinations, parameters different from the top CA band combination are used. It is determined to be compliant.

[Modification 1]
The operation performed by the wireless communication system according to the embodiment of the present invention has been described above. Hereinafter, another example of the operation performed by the wireless communication system will be described as a first modification. Here, a notification method of a CA band combination defined in Release 13 of 3GPP will be described using FIG.

  In step S31, the base station eNB transmits a capability information request signal (UECapabilityEnquiry) including requestReducedFormat and requestSkipFallbackComb. Here, requestReducedFormat indicates that the CA band combination should be reported using the format (supportedBandCombinationReduced-r13) defined in Release 13 instead of the conventional format (supportedBandCombination-r10). requestSkipFallbackComb omits the fallback band combination and indicates that only the top CA band combination should be reported.

  In step S32, the user apparatus UE includes CA band combination information including information indicating the highest CA band combination in the capability information notification signal (UECapabilityInformation) and transmits it to the base station eNB. Here, when there is a fallback band combination having parameters different from the various parameters in the topmost CA band combination among the corresponding fallback band combinations, the user apparatus UE reads “Variation in the topmost CA band combination Information indicating that there is a fallback band combination having parameters different from the parameters (differentFallbackSupported) is included in the capability information notification signal.

  If the base station eNB that has received the capability information notification signal including differentFallbackSupported in step S33 wants to acquire detailed information on a fallback band combination having parameters different from those of various parameters in the topmost CA band combination, the capability is again determined. Send an information request signal (UECapabilityEnquiry). Note that, unlike the capability information request signal transmitted in step S31, the base station eNB transmits the capability information request signal transmitted in step S33 to the user apparatus UE without including requestReducedFormat and requestSkipFallbackComb. That is, the base station eNB requests the user equipment UE for CA band combination information (that is, CA band combination information including all CA band combinations) in the conventional format (supportedBandCombination-r10).

  In step S34, the user apparatus UE transmits, to the base station eNB, a capability information notification signal including CA band combination information of a conventional format.

  As described above, in the notification method of the CA band combination defined in Release 13 of 3GPP, among the fallback band combinations supported by the user apparatus UE, parameters different from the various parameters in the highest CA band combination are If there is a fallback band combination, the user apparatus UE will report CA band combination information in the conventional format to the base station eNB. Since all CA band combinations are included in the CA band combination information of the conventional format, there is a problem that the amount of signaling becomes enormous.

  Therefore, in the first modification, when there is a fallback band combination having parameters different from various parameters in the uppermost CA band combination, the fallback band combination having the different parameters can be efficiently reported to the base station eNB. Suggest a mechanism.

<Functional configuration>
The functional configurations of the user apparatus UE and the base station eNB according to the first modification will be described. Since the functional configuration of the user apparatus UE and the functional configuration of the base station eNB according to the first modification are the same as those in FIG. 11 and FIG. 12 respectively, only functional units different from the basic example will be described.

(User device)
If there is a fallback band combination having a parameter different from the parameter corresponding to the highest CA band combination among the parameters corresponding to each of the CA band combinations usable in CA in the user apparatus UE, CA band combination information is generated which further includes information indicating that a fallback band combination having different parameters is present.

  Further, the generation unit 104 is instructed by the base station eNB to report a fallback band combination having a parameter different from a parameter corresponding to the predetermined CA band combination among the fallback combinations in the predetermined CA band combination. CA band combination information including information indicating fallback band combinations having parameters different from the parameters corresponding to the predetermined CA band combination among the fallback band combinations in the predetermined CA band combination is generated.

(base station)
The UE capability determination unit 204 has a parameter having a parameter different from the parameter corresponding to the highest CA band combination among the parameters corresponding to each of the CA band combinations available in the CA in the user apparatus UE from the user apparatus UE. When CA band combination information including information indicating that a back band combination exists is received, the user apparatus UE has an ability corresponding to a fallback band combination having a parameter different from a parameter corresponding to the highest CA band combination. Recognize that there is.

  When the user equipment UE recognizes that the user equipment UE has the ability to correspond to the fallback band combination having a parameter different from the parameter corresponding to the highest CA band combination, the DL signal transmission unit 201 determines if the user equipment UE determines that Among the fallback combinations in the CA band combination, a signal instructing to report a fallback band combination having a parameter different from the parameter corresponding to the predetermined CA band combination may be transmitted to the user apparatus UE.

<Processing procedure>
(Operation sequence)
FIG. 21 is a sequence diagram showing an operation of the radio communication system according to the first modification of the present invention. The processing procedure of step S41 is the same as step S31 of FIG.

  In step S42, the generation unit 104 of the user apparatus UE generates CA band combination information including information indicating the highest CA band combination. In addition, when there is a fallback band combination having parameters different from various parameters in the topmost CA band combination among the corresponding fallback band combinations, the generation unit 104 generates information indicating the topmost CA band combination and CA band combination information including “various parameters in the top CA band combination and information indicating that there is a fallback band combination having different parameters (differentFallbackSupported)” is generated.

  In step S43, the UL signal transmission unit 102 of the user apparatus UE transmits a capability information notification signal (UECapabilityInformation) including the generated CA band combination information to the base station eNB. Steps S42 and S43 correspond to step S32 in FIG.

  In step S44, the DL signal transmission unit of the base station eNB details the fallback band combination having parameters different from various parameters in the uppermost CA band combination when the capability information notification signal including the differentFallbackSupported is received. If it is desired to acquire such information, the capability information request signal (UECapabilityEnquiry) is transmitted again. Here, the DL signal transmission unit of the base station eNB “requests a report of a fallback band combination having a parameter different from a parameter corresponding to the predetermined CA band combination among the fallback combinations in the predetermined CA band combination The instruction is included in the capability request signal and transmitted to the user apparatus UE. The instruction may be called requestDiffFallbackCombList.

  Although it is assumed that the predetermined CA band combination is the same as the highest CA band combination included in the capability information notification signal notified from the user apparatus UE, the present invention is not necessarily limited thereto, and the base station eNB Contains the CA band combination that you want to report. For example, when a plurality of top CA band combinations are reported from the user apparatus UE in the processing procedure of step S43, the predetermined CA band combination is the base station eNB of the plurality of top CA band combinations. It may be one or more top CA band combinations that you wish to report. In addition, the predetermined CA band combination is, for example, one or more of the highest ranks supported by the base station eNB among fallback combinations of the highest rank CA band combination reported from the user apparatus UE in the processing procedure of step S43. It may be a CA band combination. For example, the highest CA band combination reported from the user apparatus UE is 1A-3A-19A-42A, and the CA band combination supported by the base station eNB is 1A-3A-19A and its fallback combination, And 3A-19A-42A and its fallback combination only. In this case, the base station eNB may notify 1A-3A-19A and 3A-19A-42A instead of 1A-3A-19A-42A as a predetermined CA band combination. Thereby, the base station eNB can narrow down the CA band combination to be reported to the user apparatus UE to the CA band combination that the base station eNB itself desires to report, and can reduce the amount of signaling.

  Further, the capability information request signal transmitted in step S44 further includes an instruction (requestReducedFormat) to report the CA band combination using the format (supportedBandCombinationReduced-r13) defined in Release 13. It is also good.

  In step S45, in the capability information request signal received in step S44, the generation unit 104 of the user apparatus UE “in the fallback combination in the predetermined CA band combination, a parameter different from the parameter corresponding to the predetermined CA band combination If the instruction to request the report of the fallback band combination having “A” is included, the CA band combination information including “the information indicating the fallback band combination having a parameter different from the parameter corresponding to the predetermined CA band combination” Generate

  “Information indicating a fallback band combination having a parameter different from a parameter corresponding to a predetermined CA band combination” is information of a CA band combination including only a parameter different from a parameter corresponding to the predetermined CA band combination Good. For example, in the 19A-42A CA band combination which is a fallback combination of 1A-3A-19A-42A, the user apparatus UE supports only the 19A band of 2-layer and 4-layer MIMO, and the 42A band It is assumed that only two layers of MIMO are supported in all bands of CA and other CA band combinations. In this case, when 1A-3A-19A-42A is designated as a predetermined CA band combination from the base station eNB, the generation unit 104 of the user apparatus UE is a 19A band in the CA band combination of 19A-42A. In this case, CA band combination information may be generated that supports four layer MIMO and only supports two layer MIMO in the 42A band. In other words, in the 19A-42A CA band combination, the 19A band supports 2 layers of MIMO, and the 42A band does not generate information of CA band combinations indicating that 2 layers of MIMO are supported. You may

  Further, the CA band combination information generated in step S45 indicates, as echo back to the base station eNB, the uppermost CA band combination of the fallback band combination having a parameter different from the parameter corresponding to the predetermined CA band combination. Information may be included. The information indicating the top CA band combination may be called requestedDiffFallbackCombList. Thereby, the base station eNB uses only the capability information notification signal notified from the user apparatus UE without being aware of the predetermined CA band combination itself included in the capability information request signal, and the range of CA band combinations. (That is, for the notified highest-order CA band combination and the range of the fallback combination thereof) grasping whether a CA band combination (fallback combination) having different parameters is reported from the user apparatus UE it can.

  More specifically, the information (requestedDiffFallbackCombList) indicating the highest-order CA band combination indicates the same CA band combination as the "predetermined CA band combination" included in the capability request signal received in step S44. It may be information. Further, the present invention is not limited to this, and the information indicating the highest CA band combination may be information indicating a CA band combination that falls under a fallback band combination having a parameter different from the parameter corresponding to the predetermined CA band combination. For example, the information may not necessarily be information indicating the same CA band combination as the "predetermined CA band combination" included in the capability request signal received in step S44. This enables the user apparatus UE to report only some of the fallback combinations of the fallback band combinations having parameters different from the parameters corresponding to the predetermined CA band combination.

  In step S46, the UL signal transmission unit 102 of the user apparatus UE transmits, to the base station eNB, a capability information notification signal including the CA band combination information generated in step S45. Based on the CA band combination information included in the received capability information notification signal, the UE capability determination unit 204 of the base station eNB can grasp the fallback band combination having a parameter different from the parameter corresponding to the predetermined CA band combination. it can.

  In addition, when the information (requestedFrequencyBands) indicating the plurality of bands supported by the base station eNB is notified in the capability information request (S41, S44), the generation unit 104 performs the processing procedure in steps S42 and S45. "Fallback band combination having a parameter different from the parameter corresponding to the predetermined CA band combination", "information indicating the highest CA band combination" in the notified plurality of bands, respectively "Indicating information" is included in the CA band combination information. In other words, the generation unit 104 may generate CA band combination information filtered by a plurality of bands notified from the base station eNB.

(Example of specification change)
Subsequently, an example of changing the specification of the RRC message in the modification 1 will be described.

  FIG. 22 is a diagram showing a specification modification example showing the operation of the RRC layer when the user apparatus UE generates the capability information notification described in step S44 to step S46 in FIG.

  As shown in FIG. 22 as “5> else if the UE supports requestReducedFormat and UE supports diffFallbackCombReport and UECapabilityEnquiry message includes requestDiffFallbackCombList:”, the user apparatus UE supports the format defined in Release 13 (requestReducedFormat And the fallback band having a parameter different from the parameter corresponding to the predetermined CA band combination among the fallback combinations in the predetermined CA band combination, corresponding to the operation shown in the first modification (diffFallbackCombReport) When receiving the capability information request (UECapabilityEnquiry) including “instruction for requesting combination report” (requestDiffFallbackCombList), the user apparatus UE performs the following operation.

  Specifically, first, the user apparatus UE is described as “6> for each CA band combination indicated in requestDiffFallbackCombList, include its fallback band combinations for which the capabilities are different from the band combinations indicated in requestDiffFallbackCombList;”. Has a parameter (Capability) different from the predetermined CA band combination in each of the fallback band combinations of the predetermined CA band combinations (one or more CA band combinations included in requestDiffFallbackCombList) instructed from the base station eNB Generate capability information notification (UECapabilityInformation) including a fallback band combination.

  Also, as described in “6> include CA band combinations with the highest supported number of DL and UL carriers whose fallback combinations with different capabilities are to be reported, into requestedDiffFallbackCombList; Capability: Include in the requestedDiffFallbackCombList the fallback combination's highest supported CA band combinations with the highest supported numbers of DL and UL carriers.

  FIGS. 23 and 24 are diagrams showing an example of changing the specification of the capability information request transmitted in step S44 of FIG. FIG. 23 shows an example of changing the specification of the UECapabilityEnquiry message, and FIG. 24 shows an explanation of each field included in the UECapabilityEnquiry message. The “instruction for requesting a report of a fallback band combination having a parameter different from the parameter corresponding to the predetermined CA band combination among the fallback combinations in the predetermined CA band combination described in step S44 of FIG. 24 and “requestDiffFallbackCombList” of FIG.

  FIG. 24 is a diagram showing a specification change example (part 1) of the capability information notification transmitted in step S46 of FIG. The example of FIG. 24 shows an example of specification change in the case of extending existing signaling (UE-EUTRA-Capability).

  The CA band combination information including “the information indicating the fallback band combination having a parameter different from the parameter corresponding to the predetermined CA band combination” described in step S46 in FIG. 21 corresponds to “supportedBandCombinationReduced” in FIG. In addition, “information indicating the highest CA band combination of the fallback band combination having a parameter different from the parameter corresponding to the predetermined CA band combination as echo back to the base station eNB” described in step S46 of FIG. Corresponds to “requestedDiffFallbackCombList” in FIG. Further, “diffFallbackCombReport” in FIG. 24 is information indicating that the user apparatus UE corresponds to the operation shown in the first modification, and is set as echo back to the base station eNB.

  FIGS. 25 and 26 are diagrams showing a second example of changing the specification of the capability information notification transmitted in step S46 of FIG. Unlike the example of FIG. 24, the example of FIG. 25 and FIG. 26 shows an example of specification change in the case of defining a new UECapablityInformation message. In this modified example of the specification, since an information element essential to existing signaling (UE-EUTRA-Capability) can be reduced, it is possible to reduce the amount of signaling as compared to the example of FIG.

  The CA band combination information including “the information indicating the fallback band combination having a parameter different from the parameter corresponding to the predetermined CA band combination” described in step S46 of FIG. 21 corresponds to “supportedBandCombinationReduced” of FIG. In addition, “information indicating the highest CA band combination of the fallback band combination having a parameter different from the parameter corresponding to the predetermined CA band combination as echo back to the base station eNB” described in step S46 of FIG. Corresponds to “requestedDiffFallbackCombList” in FIG. Further, “diffFallbackCombReport” in FIG. 26 is information indicating that the user apparatus UE corresponds to the operation shown in the first modification, and is set as echo back to the base station eNB.

  As described above, according to the first modification, the amount of signaling when the user apparatus UE reports to the base station eNB a fallback band combination having parameters different from various parameters in the highest-order CA band combination is defined by release 13. It is possible to reduce the amount of signaling in the processing procedure.

[Modification 2]
Below, the other example of the operation | movement which this radio | wireless communications system performs is demonstrated as the modification 2. FIG. In the second modification, the user apparatus UE communicates with the base station eNB providing one or more LTE cells and the base station gNB providing one or more NR cells by DC.

  FIG. 28 is a sequence diagram for explaining an example of the UE capability notification operation according to the second modification. Although not shown, the user apparatus UE communicates with the base station eNB of LTE using the base station gNB of NR and DC.

  In step S51, the base station eNB transmits the capability information request related to the band combination to the user apparatus UE. For example, the capability information request may be performed by including "requestDiffFallbackCombList" in a "UECapabilityEnquiry" message transmitted by the base station eNB to the user apparatus UE.

  In step S52, the user apparatus UE generates CA band combination information based on "requestDiffFallbackCombList". The CA band combination information includes the LTE cell band provided by the base station eNB and the NR cell band provided by the base station gNB connected by DC. Details will be described later.

  In step S53, the user apparatus UE transmits the capability information notification regarding the band combination generated in step S52 to the base station eNB using “requestedDiffFallbackCombList”. In the above steps, the base station eNB can acquire CA band combination information supported by the user apparatus UE including the LTE and NR bands.

  FIG. 29 is a flowchart for describing an example of a UE capability notification operation according to the second modification. The procedure shown in FIG. 29 is an operation that is executed in the user apparatus UE and generates CA band combination information in step S52 shown in FIG. Therefore, the user apparatus UE may have received the "UECapabilityEnquiry" message from the base station apparatus eNB at a time point before step S61.

  In step S61, the user apparatus UE puts the CA band combination supported by the UE in the candidate list. Subsequently, the user apparatus UE determines whether the UE itself supports “requestReducedFormat” and “diffFallbackCombReport” (S62). If it is supported (YES in S62), the process proceeds to step S63. If it is not supported (NO in S62), the flow ends.

  In step S63, the user apparatus UE determines whether the "UECapabilityEnquiry" message received from the base station apparatus eNB includes "requestDiffFallbackCombList". If it is included (YES in S63), the process proceeds to step S64, and if it is not included (NO in S63), the flow ends.

  In step S64, for each of the CA band combinations included in "requestDiffFallbackCombList", (1) the case where the CA band combination is not included in the candidate list is included. (2) Include when the UE capability in the relevant CA band combination and the UE capability at fallback are different.

  Subsequently, in step S65, the "requestedDiffFallbackCombList" includes the CA band combination included in the "requestDiffFallbackCombList" included in S64. However, CA band combinations with the same UE capability at fallback are not included in "requestedDiffFallbackCombList".

  Subsequently, in step S66, the user apparatus UE notifies the base station apparatus eNB of "requestedDiffFallbackCombList" via the "UECapabilityInformation" message.

  FIG. 30 is a diagram illustrating an example of the UE capability notification operation according to the second modification. As shown in FIG. 30, the user apparatus UE generates a "UECapabilityInformation" message including the supported CA band combination.

  If “ue-CapabilityRequest” includes “eutra” indicating that the “ue-CapabilityRequest” corresponds to LTE RAT (Radio Access Technology), the procedure shown in FIG. 29 is started. A list of band candidates is defined, and supported CA band combinations are set according to a prescribed procedure.

  The procedure described in FIG. 29 is performed, and a CA band combination in which the UE capability in the CA band combination and the UE capability at fallback are different is set in “requestedDiffFallbackCombList”.

  Further, FIG. 30 shows a procedure in the case where the user apparatus UE corresponds to the RAT of NR. When the user apparatus UE supports NR and the "ue-CapabilityRequest" includes "nr" indicating that the apparatus supports the RAT of NR, "ue-Capability RAT- The procedure of notifying to the base station eNB is executed by being included in “Container”. The "ue-Capability RAT-Container" will be described later.

  Further, FIG. 30 shows a procedure in the case where the user apparatus UE corresponds to DC including NR. "Mr-dc" indicating that the user apparatus UE supports NR and LTE using DC, that is, MR-DC (Multi-RAT Dual Connectivity), and corresponds to "UE-CapabilityRequest" for NR RAT Is included, the procedure of including the radio access capability of the user apparatus UE in "ue-Capability RAT-Container" and notifying the base station eNB is performed.

  The various capabilities of the user apparatus UE generated by the procedure shown in FIG. 30 are notified to the base station eNB via the “UECapabilityInformation” message.

  FIG. 31 is a diagram illustrating an example (1) of a message of the UE capability notification operation according to the second modification. In FIG. 31, information elements "UE-Capability RAT-Container List" and "RAT-Type" of the RRC message will be described.

  The information element "UE-Capability RAT-ContainerList" is used to notify the base station eNB of the radio access capability of the user apparatus UE. As shown in FIG. 31, “UE-Capability RAT-ContainerList” includes “RAT-Type”.

  The information element "RAT-Type" indicates a RAT supported by the user apparatus UE. The value of “RAT-Type” is, for example, “eutra” indicating LTE, “utra” indicating 3G, “geran-cs” and “geran-ps” indicating GSM (registered trademark), and “cdma2000- indicating CDMA2000”. It is possible to set “1XRTT”, “nr” indicating NR, “mr-dc” indicating DC between NR and another RAT, and the like.

  FIG. 32 is a diagram illustrating an example (2) of the message of the UE capability notification operation according to the second modification. As shown in FIG. 32, “requestBandCombList” may be included in the information element “UECapabilityEnquiry-v15xy-IEs” of the RRC message indicating the capability information request transmitted from the base station eNB to the user apparatus UE. "RequestBandCombList" is used to notify the base station apparatus eNB of a band combination that can be used by MR-DC, similarly to "requestDiffFallbackCombList" described in FIG.

  “RequestBandCombList-15” includes “BandCombinationList MRDC-r15” described later. As shown in FIG. 32, as a condition, “BandCombinationList MRDC-r15” is set in the field only when “mr-dc” is included in “ue-CapabilityRequest”.

  “RequestBandCombList” is used to notify the base station apparatus eNB of a band combination capable of MR-DC in which the UE capability in the MR-DC capable band combination supported by the user apparatus UE and the UE capability different in fallback are different. used. If the UE capability in the MR-DC capable band combination and the UE capability at fallback are the same, the band combination is not included in the list. The information element indicating the list may be "requestedBandCombList".

  FIG. 33 is a diagram illustrating an example (3) of the message of the UE capability notification operation according to the second modification. The information element "BandCombinationList MRDC" shown in FIG. 33 is used to indicate a band combination in MR-DC. As shown in FIG. 33, BandWidthClasses of a plurality of EUTRA bands, a plurality of NR bands, and respective bands can be set.

  As described above, in the second modification, when the user apparatus UE communicates using DC in NR and LTE, UE capability in CA band combination including NR band and LTE band supported by the user apparatus UE. And the UE capability at the time of fallback can be notified to the base station eNB of different CA band combinations.

[Modification 3]
Below, the other example of the operation | movement which this radio | wireless communications system performs is demonstrated as the modification 3. FIG. In the third modification, the user apparatus UE communicates with the base station gNB that provides one or more NR cells and the base station eNB that provides one or more LTE cells by DC. Moreover, in the modification 3, the user apparatus UE communicates using the base station gNB which provides the cell of one or more NR, and CA in several NR cells. Also, in the third modification, the user apparatus UE communicates with the base station gNB that provides one or more NR cells and the other base station gNB using DC in a plurality of NR cells.

  FIG. 34 is a sequence diagram for explaining an example of the UE capability notification operation according to the third modification. Although not shown, the user apparatus UE communicates with the base station eNB of NR together with the base station gNB of NR using DC. FIG. 34 shows the sequence of the user apparatus UE and the base station gNB.

  In step S71, the base station gNB transmits, to the user apparatus UE, a capability information request related to the band combination. For example, the capability information request may be performed by including "requestBandCombList" in a "UECapabilityEnquiry" message transmitted by the base station eNB to the user apparatus UE. Further, the RAT of the user apparatus UE may be designated by the “UE-Capability Request” message including “nr” or “mr-dc” in the “ue-Capability Request”.

  In step S72, the user apparatus UE generates band combination information based on "requestBandCombList". The band combination information includes the band of the NR cell provided by the base station gNB and the band of the LTE cell provided by the base station eNB connected by DC. Details will be described later.

  In step S73, the user apparatus UE transmits the capability information notification regarding the band combination generated in step S72 to the base station gNB using the "requestedBandCombList". Through the above steps, the base station gNB can acquire band combination information supported by the user apparatus UE including the NR and LTE bands.

  FIG. 35 is a flowchart for explaining an example of a UE capability notification operation according to the third modification. The procedure shown in FIG. 35 is an operation that is executed in the user apparatus UE and generates band combination information in step S72 shown in FIG. Therefore, the user apparatus UE may have received the “UECapabilityEnquiry” message from the base station apparatus gNB before step S71.

  In step S81, the user apparatus UE determines whether the "UECapabilityEnquiry" message received from the base station apparatus gNB includes "requestBandCombList". If it is included (YES in S81), the process proceeds to step S82, and if it is not included (NO in S81), the flow ends.

  In step S82, (1) the band combination is included for each of the band combinations included in the "requestBandCombList". (2) Include the case where the UE capability in the band combination and the UE capability at fallback are different.

  Subsequently, in step S83, the band combination included in the "requestBandCombList" included in step S82 is included in the "requestedBandCombList". However, band combinations with the same UE capability at fallback are not included in the "requestedBandCombList".

  Subsequently, in step S84, the user apparatus UE notifies the base station apparatus gNB of "requestedBandCombList" via the "UECapabilityInformation" message.

  In the above procedure, when the user apparatus UE is communicating using DC in NR and LTE, notifying the base station gNB of a band combination including an NR band and an LTE band supported by the user apparatus UE. Can. Note that the name of the information element “requestedBandCombList” is an example, and is not limited to this.

  FIG. 36 is a diagram illustrating an example of a UE capability notification operation according to the third modification. As shown in FIG. 36, as “Initiation”, ie, initialization, the base station gNB acquires information on the required UE radio access capability from the user apparatus UE. As shown in FIG. 36, the user apparatus UE generates a "UECapabilityInformation" message including the supported band combination.

  If the "ue-CapabilityRequest" includes "mr-dc" indicating that it supports NR and LTE DC, the "5.6.1.4 Compilation of band combinations supported by the UE" procedure is started In “requestedBandCombList”, an MR-DC band combination in which UE capabilities in the MR-DC band combination and UE capabilities in fallback are different is set.

  Here, a case will be described where “ue-CapabilityRequest” includes “nr” indicating that it corresponds to the RAT of NR. The user apparatus UE applies the procedure shown in FIG. 35 to the DC by a plurality of NR cells provided by the base station apparatus gNB and the other gNB, in the “requestedBandCombList”, in the band combination of DCs in NR. The base station gNB may be notified of a band combination of DCs in NRs different in UE ability and UE ability at fallback. Alternatively, the user equipment UE applies the procedure shown in FIG. 35 to the CA by a plurality of NR cells provided by the base station apparatus gNB, and in the “requestedBandCombList”, the UE capability and fall in the band combination of CA in NR. The base station gNB may be notified by setting a band combination of CAs in NRs different from the UE capability when backing up.

  The procedure in “5.6.1.4 Compilation of band combinations supported by the UE” in FIG. 36 is similar to the procedure described in FIG.

  FIG. 37 is a diagram illustrating an example (1) of a message of the UE capability notification operation according to the third modification. “UECapabilityEnquiry” illustrated in FIG. 37 indicates an information element of a message transmitted on the downlink channel from the base station gNB to the user apparatus UE. "UECapabilityEnquiry" is used for the capability information request from the base station apparatus gNB to the user apparatus UE as described above.

  FIG. 38 is a diagram illustrating an example (2) of the message of the UE capability notification operation according to the third modification. “UECapabilityInformation” illustrated in FIG. 38 indicates an information element of a message transmitted on the uplink channel from the user apparatus UE to the base station gNB. "UECapabilityInformation" is used for the capability information notification from the user apparatus UE to the base station apparatus gNB as described above.

  FIG. 39 is a diagram illustrating an example (3) of the message of the UE capability notification operation according to the modification 3. As shown in FIG. 39, “requestBandCombList” may be included in the information element “UECapabilityEnquiry-r15-IEs” of the RRC message indicating the capability information request transmitted from the base station gNB to the user apparatus UE. “RequestBandCombList”, as described in FIG. 32, is a band in which the UE capability in MR-DC capable band combination and the UE capability in fallback with the CA or DC possible band combination in NR are different from each other. The combination can be notified to the base station gNB.

  “Ue-CapabilityRequest” is, for example, “eutra” indicating LTE, “utra” indicating 3G, and GSM, such as the information element “RAT-Type” described in FIG. “Geran-cs” and “geran-ps” indicating (registered trademark), “cdma2000-1XRTT” indicating CDMA2000, “nr” indicating NR, and “mr-dc” indicating DC between NR and other RATs It can be specified as

  FIG. 40 is a diagram illustrating an example (4) of the message of the UE capability notification operation according to the third modification. As shown in FIG. 40, in the “UECapabilityInformation” message, “UECapabilityRat-ContainerList-15” is included in “UECapabilityInformation-r15”. As mentioned above, the "UECapabilityInformation" message is used for the UE's capability information request.

  FIG. 41 is a diagram illustrating an example (5) of the message of the UE capability notification operation according to the third modification. As shown in FIG. 41, the information element "UE-Capability RAT-ContainerList" includes "RAT-Type-r15" and "UE-Capability RAT-Container". The "RAT-Type-r15" will be described later. “UE-Capability RAT-Container” stores the capabilities of the UE in the designated RAT. For example, in NR, UE capability coding is defined by "UE-NR-Capability", and in E-UTRA, UE capability is defined by "UE-EUTRA-Capability".

  FIG. 42 is a diagram illustrating an example (6) of the message of the UE capability notification operation according to the third modification. In FIG. 42, an example of the information element "UE-NR-Capability", the information element "UE-MRDC-Capability", and the information element "RAT-Type" is shown. The information element “RAT-Type” indicates a RAT supported by the user apparatus UE, as in FIG. The value of “RAT-Type” is, for example, “eutra” indicating LTE, “utra” indicating 3G, “geran-cs” and “geran-ps” indicating GSM (registered trademark), and “cdma2000- indicating CDMA2000”. It is possible to set “1XRTT”, “nr” indicating NR, “mr-dc” indicating DC between NR and another RAT, and the like.

  FIG. 43 is a diagram illustrating an example (7) of the message of the UE capability notification operation according to the third modification. In FIG. 43, an example of the information element "BandCombinationList" is shown. For example, "bandCombinationList" is included in "requestBandCombList" and indicates a band combination. As in FIG. 33, in “BandCombinationList”, BandWidthClasses of a plurality of EUTRA bands, a plurality of NR bands, and respective bands can be set.

  As described above, in the third modification, when the user apparatus UE communicates using DC in NR and LTE, or DC and CA in NR, it includes NR bands and LTE bands supported by the user apparatus UE. The base station gNB can be notified of a band combination in which the UE capability in the band combination and the UE capability in fallback are different. In addition, when the user apparatus UE communicates with the base station gNB providing one or more NR cells and CAs in a plurality of NR cells, the UE capacity and the UE capability in the NR band combination supported by the user apparatus UE are The base station gNB can be notified of a band combination that is different from the UE capability at the time of fallback. Further, in the third modification, when the user apparatus UE communicates with the base station gNB providing one or more NR cells and the other base station gNB using DC in a plurality of NR cells. The base station gNB can be notified of a band combination in which the UE capability in the band combination of NRs supported by the user apparatus UE differs from the UE capability when falling back.

[Modification 4]
Below, the other example of the operation | movement which this radio | wireless communications system performs is demonstrated as the modification 4. FIG. In the fourth modification, the user apparatus UE communicates with a base station gNB that provides one or more NR cells and CA in a plurality of NR cells. Further, in the fourth modification, the user apparatus UE communicates with the base station gNB that provides one or more NR cells and the other base station gNB using DC in a plurality of NR cells. In the fourth modification, the DC may communicate with the base station gNB that provides one or more NR cells and the base station eNB that provides one or more LTE cells.

  FIG. 44 is a sequence diagram for explaining an example of the UE capability notification operation according to the fourth modification. In step S91, the base station gNB transmits, to the user apparatus UE, a capability information request related to BPC (Baseband Processing Combination). The BPC is a combination of a plurality of CCs or BWPs, in which a function related to the baseband of the user apparatus UE is defined by CC in CA or BWP (Bandwidth Part). That is, BPC may include any combination of CC or BWP.

  For example, the capability information request may be made by including "requestDiffFallbackBPC" in the "UECapabilityEnquiry" message that the base station gNB transmits to the user apparatus UE.

  In step S92, the user apparatus UE generates BPC information based on "requestDiffFallback BPC". The BPC information includes a combination of NR cell bands provided by the base station gNB. Details will be described later.

  In step S93, the user apparatus UE transmits the capability information notification including the BPC information generated in step S92 to the base station gNB using “requestedDiffFallback BPC”. Through the above steps, the base station gNB can acquire BPC information supported by the user apparatus UE including the NR band.

  In the above steps S91 to S93, the base station gNB may be replaced with the base station eNB in LTE.

  FIG. 45 is a flowchart for describing an example of a UE capability notification operation according to the modification 4. The procedure shown in FIG. 45 is an operation that is executed in the user apparatus UE and generates band combination information in step S92 shown in FIG. Therefore, the user apparatus UE may have received the “UECapabilityEnquiry” message from the base station apparatus gNB before step S101.

  In step S101, the user apparatus UE determines whether the "UECapabilityEnquiry" message received from the base station apparatus gNB includes "requestDiffFallbackBPC". If it is included (YES in S101), the process proceeds to step S102, and if it is not included (NO in S101), the flow ends.

  In step S102, for each BPC included in "requestDiffFallback BPC", (1) when the BPC is not included in "supportedBasebandProcessingCombination", it is included in "supportedBasebandProcessingCombination". (2) If the UE capability in the relevant BPC included in “supportedBasebandProcessingCombination” is different from the UE capability at fallback, the fallback BPC is included.

  Subsequently, in step S103, the "requestedDiffFallback BPC" includes the BPC included in the "requestDiffFallback BPC" included in step S102. However, BPCs with the same UE capability at fallback are not included in "requestedDiffFallbackBPC".

  Then, in step S104, the user apparatus UE notifies "requestedDiffFallbackBPC" to the base station apparatus gNB via the "UECapabilityInformation" message.

  In the above procedure, when the user apparatus UE is communicating using DC in NR and LTE, notifying the base station gNB of a band combination including an NR band and an LTE band supported by the user apparatus UE. Can. Note that the name of the information element "requestedDiffFallbackBPC" is an example, and the present invention is not limited to this.

As a specific example, the case where one BWP has a 20 MHz bandwidth, and BPC for 2 BWP (40 MHz), BPC for 3 BWP (60 MHz), and BPC for 4 BWP (80 MHz) will be described.
1) The user apparatus UE may notify only the BPC for 4BWP.
2) When the BPC for 3BWP or 2BWP is different from the BPC for 3BWP or 2BWP obtained from the BPC for 4BWP according to 1), the user apparatus UE may notify the different BPC.

  2) of the above specific example corresponds to the procedure of including BPC in “requestedDiffFallback BPC” shown in FIG.

  FIG. 46 is a diagram illustrating an example of a UE capability notification operation according to the fourth modification. As shown in FIG. 46, the user apparatus UE generates a "UECapabilityInformation" message including a supporting BPC.

  When “ue-CapabilityRequest” includes “nr” or “mr-dc”, “supportedBasebandProcessingCombination” is the procedure of “5.6.1.5 Compilation of baseband processing combinations supported by the UE” shown in FIG. , BPC supported by the user apparatus UE is included.

  Note that “supportedBasebandProcessingCombination” may include BPC supported by the user apparatus UE in each of NR, EUTRA, and MRDC.

  The procedure regarding “requestDiffFallbackBPC” in “5.6.1.5 Compilation of baseband processing combinations supported by the UE” in FIG. 46 is similar to the procedure described in FIG.

  In addition, "UECapabilityInformation" generated by the procedure shown in FIG. 46 may be notified to the base station eNB as well as the base station gNB.

  FIG. 47 is a diagram illustrating an example (1) of a message of the UE capability notification operation according to the fourth modification. As shown in FIG. 47, “requestDiffFallbackBPC” may be included in the information element “UECapabilityEnquiry-r15-IEs” of the RRC message indicating the capability information request transmitted from the base station gNB to the user apparatus UE. “RequestDiffFallback BPC”, as described in FIG. 46, bases a BPC in which the CA or DC in NR and the UE capability in the BPC supported by the user equipment UE in MR-DC differ from the UE capability when falling back. The station gNB can be notified.

  FIG. 48 is a diagram illustrating an example (2) of the message of the UE capability notification operation according to the fourth modification. The example of information element "UE-NR-Capability" and information element "UE-MRDC-Capability" is shown by FIG. As an information element regarding notification of BPC supported by the user apparatus UE, "SupportedBasebandProcessingCombination" is included, and "BasebandProcessingCombinationParameters" is included only for the size "maxBasebandProcComb".

  FIG. 49 is a diagram illustrating an example (3) of the message of the UE capability notification operation according to the fourth modification. As shown in FIG. 49, “requestDiffFallbackBPC” may be included in the information element “UECapabilityEnquiry-v15xy-IEs” of the RRC message indicating the capability information request transmitted from the base station gNB to the user apparatus UE. “RequestDiffFallback BPC” is a BPC in which the UE capability in the CA or DC capable in NR and the BPC capable of MR-DC are different from the UE capability at fallback as described in FIG. 45 and FIG. 46. Can be notified to the base station gNB.

  As described above, in the fourth modification, when the user apparatus UE communicates using DC in NR and LTE, or CA or DC in NR, the NR band or LTE band supported by the user apparatus UE. The base station gNB can be notified of BPCs different in UE capability in BPC including and UE capability at fallback.

[Modification 5]
Below, the other example of the operation | movement which this radio | wireless communications system performs is demonstrated as the modification 5. FIG. In the fifth modification, the user apparatus UE communicates with a base station gNB that provides one or more NR cells and CA in a plurality of NR cells. Further, in the fifth modification, the user apparatus UE communicates with the base station gNB providing one or more NR cells and the other base station gNB using DCs in a plurality of NR cells. Furthermore, in the fifth modification, the DC may communicate with the base station gNB that provides one or more NR cells and the base station eNB that provides one or more LTE cells.

  FIG. 50 is a sequence diagram for explaining an example of the UE capability notification operation according to the fifth modification. In step S111, the base station gNB transmits, to the user apparatus UE, a capability information request related to BPC (Baseband Processing Combination). The BPC is a combination of a plurality of CCs or BWPs, in which a function related to the baseband of the user apparatus UE is defined by CC in CA or BWP (Bandwidth Part). That is, BPC may include any combination of CC or BWP.

  For example, the capability information request may include "requestSkipFallbackBPC" in the "UECapabilityEnquiry" message that the base station gNB transmits to the user apparatus UE.

  In step S112, the user apparatus UE generates BPC information based on "requestSkipFallbackBPC". The BPC information includes a combination of NR cell bands provided by the base station gNB. Details will be described later.

  In step S113, the user apparatus UE transmits the capability information notification including the BPC information generated in step S112 to the base station gNB using “supportedBasebandProcessingCombination”. Through the above steps, the base station gNB can acquire BPC information supported by the user apparatus UE including the NR band.

  In the above steps S111 to S113, the base station gNB may be replaced with the base station eNB in LTE.

  FIG. 51 is a flowchart for describing an example of a UE capability notification operation according to the fifth modification. The procedure shown in FIG. 51 is an operation that is executed in the user apparatus UE and generates band combination information in step S112 shown in FIG. Therefore, the user apparatus UE may have received the “UECapabilityEnquiry” message from the base station apparatus gNB before step S121.

  In step S121, the user apparatus UE includes all corresponding BPCs in the candidate list.

  In step S122, the user apparatus UE determines whether the "UECapabilityEnquiry" message received from the base station apparatus gNB includes "requestSkipFallbackBPC". When it contains (YES of S122), it progresses to step S123, and when it does not contain (NO of S121), it progresses to step S124.

  In step S123, for each BPC included in the candidate list, when there is a BPC that has been fallback from the BPC, the fallback BPC is deleted from the candidate list.

  Subsequently, in step S124, the user apparatus UE includes the candidate list in the supportedBasebandProcessingCombination. The user apparatus UE notifies the "supportedBasebandProcessingCombination" to the base station apparatus gNB via the "UECapabilityInformation" message.

  In the above procedure, when the user apparatus UE is communicating using DC in NR and LTE, notifying the base station gNB of a band combination including an NR band and an LTE band supported by the user apparatus UE. Can. Note that the name of the information element “requestSkipFallbackBPC” or “supportedBasebandProcessingCombination” is an example, and is not limited to this.

  As a specific example, the case where one BWP has a 20 MHz bandwidth, and BPC for 2 BWP (40 MHz), BPC for 3 BWP (60 MHz), and BPC for 4 BWP (80 MHz) will be described. If the BPC for 3BWP or 2BWP is a BPC dropped back from a BPC for 4BWP, the BPC is not included in the notification of “supportedBasebandProcessingCombination” by the user apparatus UE.

  FIG. 52 is a diagram illustrating an example (1) of the UE capability notification operation according to the fifth modification. As shown in FIG. 52, the user apparatus UE generates a "UECapabilityInformation" message including a supporting BPC.

  When “ue-CapabilityRequest” includes “nr”, “supportedBasebandProcessingCombination” is the user apparatus UE in the procedure of “5.6.1.4 Compilation of baseband processing combinations supported by the UE” shown in FIG. 52. Includes supported BPCs.

  Note that “supportedBasebandProcessingCombination” may include a BPC supported by the user apparatus UE in each of NR, E-UTRA, and MR-DC.

  The procedure regarding “requestSkipFallbackBPC” in “5.6.1.4 Compilation of baseband processing combinations supported by the UE” in FIG. 52 is the same as the procedure described in FIG.

  In addition, "UECapabilityInformation" generated by the procedure shown in Fig. 52 may be notified not only to the base station gNB but also to the base station eNB.

  FIG. 53 is a diagram illustrating an example (1) of a message of the UE capability notification operation according to the fifth modification. As shown in FIG. 53, an information element “UECapabilityEnquiry” of the RRC message indicating the capability information request transmitted from the base station gNB to the user apparatus UE is defined.

  FIG. 54 is a diagram illustrating an example (2) of the message of the UE capability notification operation according to the fifth modification. As shown in FIG. 54, in response to the capability information request transmitted from the base station gNB to the user apparatus UE, an information element "UECapabilityInformation" of the RRC message transmitted from the user apparatus UE to the base station gNB is defined. .

  FIG. 55 is a diagram illustrating an example (3) of the message of the UE capability notification operation according to the fifth modification. As shown in FIG. 53, “requestSkipFallbackBPC” may be included in the information element “UECapabilityEnquiry” of the RRC message indicating the capability information request transmitted from the base station gNB to the user apparatus UE. As described in FIG. 51, “requestSkipFallbackBPC” explicitly excludes the BPC at the time of fallback from the BPC supported by the user apparatus UE in CA or DC in NR and MR-DC as described in FIG. Can be notified.

  Also, “ue-CapabilityRequest” may be included in the information element “UECapabilityEnquiry” of the RRC message indicating the capability information request transmitted from the base station gNB to the user apparatus UE. The “ue-CapabilityRequest” includes a list of RATs requesting a report from the user apparatus UE. For example, the RAT is NR, E-UTRA, UTRA, GERAN-CS, GERAN-PS, CDMA2000 and the like.

  FIG. 56 is a diagram illustrating an example (4) of the message of the UE capability notification operation according to the fifth modification. As shown in FIG. 56, the information element "UE-CapabilityRAT-ContainerList" may be included in the information element "UECapabilityInformation". The information element "UE-Capability RAT-ContainerList" includes, for each RAT, the capability corresponding to the user apparatus UE.

FIG. 57 is a diagram illustrating an example (5) of the message of the UE capability notification operation according to the fifth modification.
As shown in FIG. 57, the information element “UE-Capability RAT-ContainerList” includes, for each RAT, the capability corresponding to the user apparatus UE. For example, when the RAT is NR, the capability corresponding to the user apparatus UE in NR is included, and when the RAT is E-UTRA, the capability corresponding to the user apparatus UE in E-UTRA is included.

FIG. 58 is a diagram illustrating an example (6) of the message of the UE capability notification operation according to the fifth modification.
As shown in FIG. 58, the information element “UE-NR-Capability” may include the information element “supportedBasebandProcessingCombination”. "SupportedBasebandProcessingCombination" includes "BasebandProcessingCombinationParameters" for the size "maxBasebandProcComb".

FIG. 59 is a diagram illustrating an example (7) of the message of the UE capability notification operation according to the fifth modification.
As shown in FIG. 59, the information element "UE-NR-Capability" may include an information element "BasebandParametersPerBand", an information element "BasebandParametersPerCC", an information element "BandCombinationParameters", and the like.

FIG. 60 is a diagram illustrating an example (8) of the message of the UE capability notification operation according to the fifth modification.
As illustrated in FIG. 60, the information element "UE-NR-Capability" may include an information element "CA-BandwidthClass", an information element "MIMO-Beamformed Capabilities", an information element "Supported Band NR", and the like.

FIG. 61 is a diagram illustrating an example (9) of the message of the UE capability notification operation according to the fifth modification.
As shown in FIG. 61, an information element "UE-MRDC-Capability" is defined. Also, the information element "BandCombinationList" includes an information element "BandCombination", an information element "BandIndication", an information element "BandIndication EUTRA", and an information element "BandIndication NR".

  FIG. 62 is a diagram illustrating an example (10) of the message of the UE capability notification operation according to the fifth modification. As shown in FIG. 62, an information element "FreqBandIndicator" is defined. "MaxBandComb" is defined as the maximum number of DL band combinations. "MaxBasebandProcComb" is defined as the maximum number of BPCs. "MaxServCell" is defined as the maximum number of serving cells. "MaxSimultaneous Bands" is defined as the maximum number of bands used simultaneously. "MaxUL-Combinations" is defined as the maximum number of ULbandwidthclass combinations. "MaxCSI-Proc" is defined as the maximum number of CSI processes per carrier. Also, “RAT-Type” includes the type of RAT, and “nr”, “mr-dc”, “eutra”, “utra”, “geran-cs”, “geran-ps”, “cdma2000-1XRTT” Etc. are defined.

  FIG. 63 is a flowchart for describing a UE capability notification operation example (2) according to the fifth modification. The procedure shown in FIG. 63 is an operation that is executed in the user apparatus UE and generates band combination information in step S112 shown in FIG. Therefore, the user apparatus UE may have received the “UECapabilityEnquiry” message from the base station apparatus gNB before step S131.

  In step S131, the user apparatus UE includes all corresponding BPCs in the candidate list.

  In step S132, the user apparatus UE determines whether the "UECapabilityEnquiry" message received from the base station apparatus gNB includes "requestSkipFallbackBPC". When it contains (YES of S132), it progresses to step S133, and when it does not contain (NO of S131), it progresses to step S135.

  In step S133, the user apparatus UE includes, in the candidate list, only BPCs that are equal to or less than the maximum value of the sum of CA bandwidth classes notified from the base station apparatus gNB.

  Subsequently, in step S134, for each BPC included in the candidate list, if there is a BPC to which a fallback is made from the BPC, the fallback BPC is deleted from the candidate list.

  Subsequently, in step S135, the user apparatus UE includes the candidate list in the supportedBasebandProcessingCombination. The user apparatus UE notifies the "supportedBasebandProcessingCombination" to the base station apparatus gNB via the "UECapabilityInformation" message.

  FIG. 64 is a diagram illustrating an example (2) of the UE capability notification operation according to the fifth modification. As shown in FIG. 64, the user apparatus UE generates a "UECapabilityInformation" message including a supporting BPC.

  When “n-” is included in “ue-CapabilityRequest”, “supportedBasebandProcessingCombination” is the user apparatus UE in the procedure of “5.6.1.4 Compilation of baseband processing combinations supported by the UE” shown in FIG. Includes supported BPCs.

  Note that “supportedBasebandProcessingCombination” may include a BPC supported by the user apparatus UE in each of NR, E-UTRA, and MR-DC.

  With regard to the procedure regarding "requestSkipFallbackBPC" in "5.6.1.4 Compilation of baseband processing combinations supported by the UE" in Fig. 64, the maximum value of CAbandwidthclass is notified from the base station gNB to the user apparatus UE, and the value is less than the maximum value. The procedure described in FIG. 51 is modified to notify only the BPC from the user apparatus UE to the base station gNB, which is similar to the procedure described in FIG.

  In addition, "UECapabilityInformation" generated by the procedure shown in Fig. 64 may be notified to the base station eNB as well as the base station gNB.

  FIG. 65 is a diagram illustrating an example (11) of the message of the UE capability notification operation according to the fifth modification. As shown in FIG. 65, "requestSkipFallbackBPC" may be included in the information element "UECapabilityEnquiry" of the RRC message indicating the capability information request transmitted from the base station gNB to the user apparatus UE. As described in FIG. 51, “requestSkipFallbackBPC” explicitly excludes the BPC at the time of fallback from the BPC supported by the user apparatus UE in CA or DC in NR and MR-DC as described in FIG. Can be notified.

  In addition, an information element "requestFallbackBPC" may be included in the information element "UECapabilityEnquiry" of the RRC message indicating the capability information request transmitted from the base station gNB to the user apparatus UE. “RequestFallbackBPC” is used to notify of the maximum value of the sum of CAbandwidthclass described in FIG. The “requestFallback BPC” includes “maxAggregatedBW-DL” or “maxAggregatedBW-UL” for each DL or UL, respectively. “MaxAggregatedBW-DL” or “maxAggregatedBW-UL” may be determined by the number of resource blocks, may be determined by the number of carrier frequencies, or may be determined by the sum of CA bandwidth classes, for example, A + C, etc. .

  Also, “ue-CapabilityRequest” may be included in the information element “UECapabilityEnquiry” of the RRC message indicating the capability information request transmitted from the base station gNB to the user apparatus UE. The “ue-CapabilityRequest” includes a list of RATs requesting a report from the user apparatus UE. For example, the RAT is NR, E-UTRA, UTRA, GERAN-CS, GERAN-PS, CDMA2000 and the like.

  FIG. 66 is a diagram illustrating an example (1) of Fallback BPC according to the fifth modification. In FIG. 66, the definition of Fallback BPC will be described. BPC # 1 is a BPC including “CC 1: 2 layer MIMO” in CA bandwidth class “A” and “CC 1: 4 layer MIMO” and “CC 2: 2 layer MIMO” in CA bandwidth class “C”. As shown in FIG. 66 (1), BPC # 1 from which, for example, CA bandwidth class "C" is deleted is defined as BPC # 2, and is defined as Fallback BPC of BPC # 1. That is, the thing from which CC or BWP was deleted in CAbandwidthclass unit is defined as Fallback BPC.

  FIG. 67 is a diagram illustrating an example (1) of a Fallback BPC message according to the fifth modification. As shown in FIG. 67, “Fallback baseband processing combination” is defined to be a BPC in which at least one CAbandwidthclass in DL and / or UL is deleted from another BPC.

  Return to FIG. As shown in FIG. 66 (2), BPC # 1 is, for example, the one obtained by deleting “CC2” in CA bandwidth class “C” as BPC # 3, and is defined as Fallback BPC of BPC # 1. That is, one from which CC or BWP is deleted in CC units is defined as Fallback BPC.

  FIG. 68 is a diagram illustrating an example (2) of a Fallback BPC message according to the fifth modification. As shown in FIG. 68, “Fallback baseband processing combination” is defined to be a BPC in which at least one CC in SCellDL and / or UL is deleted from another BPC.

  FIG. 69 is a diagram illustrating an example (2) of Fallback BPC according to the fifth modification. A description will be given of Fallback BPC when PHY parameter, which is a physical layer parameter, is defined based on the maximum value of the sum of CAbandwidthclass notified from the base station gNB as described in FIG.

  As shown in FIG. 69, BPC # 1 is a BPC including “CC 1: 2 layer MIMO” in CA bandwidth class “A” and “CC 1: 6 layer MIMO” in CA bandwidth class “C”. As shown in FIG. 69 (1), it is possible to define BPC # 1, for example, with CAbandwidthclass “C” deleted, as BPC # 2, and Fallback BPC of BPC # 1.

  On the other hand, as shown in FIG. 69 (2), BPC # 3 of Fallback for deleting CCs belonging to CAbandwidthclass “C” from BPC # 1 becomes undefined. Therefore, PHY parameter is notified from the base station gNB to the user apparatus UE, or PHY parameter is defined in advance. For example, PHY parameters of CCs having the same CAbandwidthclass after Fallback may be applied. That is, in FIG. 69 (2), "Total: undefined" may be set as "Total: 2 layer MIMO".

  As described above, in the fifth modification, when the user apparatus UE communicates using DC in NR and LTE, or CA or DC in NR, the NR band or LTE band supported by the user apparatus UE. Since it notifies the base station gNB of the UE capability in the BPC, including the BPC, without including the UE capability of the BPC in the fallback, the signaling can be reduced. Further, by setting the maximum value of the sum of CAbandwidthclasses related to the BPC to be notified to the base station gNB, it is possible to limit the information on the UE capability related to the BPC, so it is possible to reduce the signaling. Also, by properly defining the fallbacked BPC in a certain BPC, it is possible to appropriately set the PHY parameter associated with the fallback BPC.

<Summary>
As described above, according to the embodiment, there is provided a user apparatus that communicates with a base station in a wireless communication system supporting communication by a plurality of cells, and a band combination usable for communication by a plurality of cells in the user apparatus. A generation unit configured to generate band combination information to be indicated; and a transmission unit configured to transmit the generated band combination information to a base station, wherein the generation unit is included in a plurality of predetermined band combinations from the base station. When it is requested to exclude a report of band combinations having a number of CCs smaller than the number of CCs in each of the band combinations out of the respective band combinations, in each of the band combinations included in the predetermined plurality of band combinations Among them, a band combination having a number of CCs smaller than the number of CCs in each of the above-mentioned band combinations A plurality of cells including at least one NR cell, the generated band combination information including at least one band corresponding to the NR cell; Provided.

  With the above configuration, when the user apparatus UE communicates using DC in NR and LTE, or CA or DC in NR, UE in BPC including NR band or LTE band supported by user apparatus UE. The signaling can be reduced since the capability is reported to the base station gNB without including the BPC's UE capability to fall back.

  The predetermined plurality of band combinations are band combinations which are equal to or less than a maximum value indicating a predetermined bandwidth, and the maximum value is determined by the sum of CA bandwidth classes, the number of resource blocks, or the number of carrier frequencies. Good. According to the configuration, by setting the maximum value of the sum of CAbandwidthclasses related to the BPC to be notified to the base station gNB, it is possible to limit the information on the UE capability related to the BPC, so that it is possible to reduce signaling.

  A band combination having a number of CCs smaller than the number of CCs in each of the band combinations may be determined by being removed in a CA bandwidth class unit from a certain band combination or removed in a CC unit from a certain band combination. Good. According to this configuration, by appropriately defining the fallbacked BPC in a certain BPC, it is possible to appropriately set the PHY parameter associated with the BPC at the time of fallback.

  As described above, according to the embodiment, it is a base station that communicates with a user apparatus in a wireless communication system supporting communication by a plurality of cells, and shows a combination of bands in communication by a plurality of cells from the user apparatus. A receiving unit that receives band combination information, a determining unit that determines a combination of available bands in the user apparatus according to a combination of bands included in the band combination information received by the receiving unit; The apparatus has a transmitter for requesting a report in which band combinations having a smaller number of CCs than the number of CCs in each of the band combinations among the band combinations included in a predetermined plurality of band combinations are excluded, The plurality of cells include at least one cell of NR, and the received Command combination information, the base station comprising at least one band corresponding to the cell of NR is provided.

  With the above configuration, when the user apparatus UE communicates using DC in NR and LTE, or CA or DC in NR, UE in BPC including NR band or LTE band supported by user apparatus UE. The signaling can be reduced since the capability is reported to the base station gNB without including the BPC's UE capability to fall back.

  As described above, according to the embodiment, there is provided an information notification method executed by a user apparatus communicating with a base station in a wireless communication system supporting communication by a plurality of cells, which includes communication by a plurality of cells in the user apparatus. Generating a band combination information indicating usable band combinations; and transmitting the generated band combination information to a base station, wherein the generation step includes a plurality of predetermined steps from the base station. When it is requested to exclude a report of a band combination having a number of CCs smaller than the number of CCs in each of the band combinations out of the respective band combinations included in the band combination, the predetermined plurality of band combinations are included Of the respective band combinations Generating band combination information excluding the report of band combinations having a number of CCs less than the number of CCs, wherein the plurality of cells include at least one cell of NR, and the generated band combination information is a cell of NR An information notification method including at least one band corresponding to is provided.

  With the above configuration, when the user apparatus UE communicates using DC in NR and LTE, or CA or DC in NR, UE in BPC including NR band or LTE band supported by user apparatus UE. The signaling can be reduced since the capability is reported to the base station gNB without including the BPC's UE capability to fall back.

  As described above, according to the embodiment, there is provided an information receiving method executed by a base station that communicates with a user apparatus in a wireless communication system supporting communication with a plurality of cells, the communication by the plurality of cells from the user apparatus A receiving step of receiving band combination information indicating a combination of bands, and a determining step of determining a combination of usable bands in the user apparatus according to a combination of bands included in the received band combination information; The user apparatus has a transmission step of requesting a report in which band combinations having a smaller number of CCs than the number of CCs in each of the band combinations among the band combinations included in a predetermined plurality of band combinations are excluded. And the plurality of cells are at least one NR cell. It includes, the received band combination information, the information receiving method including at least one band corresponding to the cell of NR is provided.

  With the above configuration, when the user apparatus UE communicates using DC in NR and LTE, or CA or DC in NR, UE in BPC including NR band or LTE band supported by user apparatus UE. The signaling can be reduced since the capability is reported to the base station gNB without including the BPC's UE capability to fall back.

  Further, as described above, according to the embodiment, there is provided a user equipment that communicates with a base station in a wireless communication system supporting communication with a plurality of cells, and a band usable for communication with a plurality of cells in the user equipment. A generation unit configured to generate band combination information indicating a combination; and a transmission unit configured to transmit the generated band combination information to a base station, wherein the generation unit is configured to generate a plurality of predetermined band combinations from the base station. When it is requested to report a band combination having a number of CCs smaller than the number of CCs in each of the band combinations having a parameter different from the parameter corresponding to each of the band combinations among the band combinations included Each of the band combinations included in the plurality of band combinations of Generating band combination information including information indicating a band combination having a number of CCs smaller than the number of CCs in each of the band combinations having parameters different from the parameters corresponding to the band combinations of at least one NR , And the generated band combination information includes at least one band corresponding to a cell of NR.

  According to the above configuration, when the user apparatus UE communicates using DC in NR and LTE, or DC and CA in NR, UE in a band combination including an NR band and an LTE band supported by the user apparatus UE. The base station eNB or the base station gNB can be notified of a band combination in which the capability and the UE capability at fallback are different. That is, in a wireless communication system performing carrier aggregation or dual connectivity, it is possible to reduce the amount of signal when the user apparatus notifies the base station of the capability of band combination.

  The plurality of cells include at least one NR cell and at least one LTE cell, and the generated band combination information corresponds to at least one band corresponding to the NR cell and the LTE cell And the transmitting unit transmits the generated band combination information to the base station of NR or the base station of LTE, or the plurality of cells are cells of a plurality of NRs. The generated band combination information may include a plurality of bands corresponding to the cell of NR, and the transmission unit may transmit the generated band combination information to the base station of NR. According to the configuration, in the radio communication system performing dual connectivity in the LTE base station and the NR base station, it is possible to notify the base station of the capability of the band combination supported by the user apparatus. Further, according to the configuration, it is possible to notify the base station of the capability of the band combination supported by the user apparatus by the conventional format in the wireless communication system performing carrier aggregation or dual connectivity in NR.

  The band combination information may indicate Baseband Processing Combination including a plurality of functions related to a baseband of the user apparatus defined in Component Carrier or Bandwidth Part. According to the configuration, the user apparatus can notify the base station gNB or the base station eNB of BPC information associated with CC or BWP.

  Further, as described above, according to the embodiment, there is provided a base station that communicates with a user apparatus in a wireless communication system supporting communication by a plurality of cells, and a combination of bands in communication by a plurality of cells from the user apparatus. A receiver configured to receive band combination information indicating a band combination, and a determination unit that determines a combination of available bands in the user apparatus according to a combination of bands included in the band combination information received by the receiver. The number of CCs in the user apparatus is smaller than the number of CCs in each of the band combinations having a parameter different from the parameter corresponding to each of the band combinations among each of the band combinations included in a predetermined plurality of band combinations It has a transmitter that requests a report of band combination , The plurality of cells comprises cells of at least one of NR, the received band combination information, the base station comprising at least one band corresponding to the cell of NR is provided.

  According to the above configuration, when the user apparatus UE communicates using DC in NR and LTE, or DC and CA in NR, UE in a band combination including an NR band and an LTE band supported by the user apparatus UE. The base station eNB or the base station gNB can obtain a band combination in which the capability and the UE capability at fallback are different.

  Further, as described above, according to the embodiment, in a wireless communication system supporting communication by a plurality of cells, the method is an information notification method executed by a user apparatus communicating with a base station, and the method is performed by a plurality of cells in the user apparatus. And transmitting the generated band combination information to the base station, wherein the step of generating includes combining a plurality of predetermined band combinations. Band combination information including information indicating a band combination having a number of CCs smaller than the number of CCs in each of the band combinations having a parameter different from the parameter corresponding to each of the band combinations among the band combinations included in Generating the plurality of cells at least It includes cells of NR of convex, the generated band combination information, the information notification method comprising at least one band corresponding to the cell of NR is provided.

  According to the above configuration, when the user apparatus UE communicates using DC in NR and LTE, or DC and CA in NR, UE in a band combination including an NR band and an LTE band supported by the user apparatus UE. The base station eNB or the base station gNB can be notified of a band combination in which the capability and the UE capability at fallback are different.

  Further, as described above, according to the embodiment, in the wireless communication system supporting the communication by the plurality of cells, the base station performing the communication with the user apparatus performs the information reception method, the plurality of cells from the user apparatus A receiving step of receiving band combination information indicating a combination of bands in the communication by the communication, and a determination step of determining a combination of available bands in the user apparatus according to a combination of bands included in the received band combination information And the number of CCs smaller than the number of CCs in each of the band combinations having parameters different from the parameters corresponding to the respective band combinations among the band combinations included in a predetermined plurality of band combinations in the user apparatus Need to report on the band combination And the plurality of cells include at least one cell of NR, and the received band combination information includes at least one band corresponding to the cell of NR. .

  According to the above configuration, when the user apparatus UE communicates using DC in NR and LTE, or DC and CA in NR, UE in a band combination including an NR band and an LTE band supported by the user apparatus UE. The base station eNB or the gNB can obtain a band combination in which the capability and the UE capability at fallback are different.

  As described above, according to the embodiment, a user apparatus that communicates with a base station in a wireless communication system supporting carrier aggregation, and generates band combination information indicating a band combination usable in carrier aggregation in the user apparatus Unit, and a transmission unit that transmits the generated band combination information to the base station, and the generation unit is the largest one of the largest number of CCs to be combined among the band combinations usable in carrier aggregation in the user apparatus. A user apparatus is provided that generates the band combination information including top band combination information indicating upper band combinations. The user apparatus UE provides a technology for reducing the amount of signal when the user apparatus notifies the base station of the capability of CA band combination in a radio communication system performing carrier aggregation.

  Further, when there is a band combination having a parameter different from the parameter corresponding to the highest-order band combination among the parameters corresponding to each of the band combinations usable in the carrier aggregation in the user apparatus, the generation unit The band combination information may further be generated which further includes exceptional band combination information indicating band combinations having different parameters. Thereby, even when there is an unsupported fallback band combination, the user apparatus UE may notify only the corresponding unsupported fallback band combination to the base station eNB, so that the CA band combination It is possible to reduce the amount of signal when notifying the base station of the capability.

  In addition, when the base station notifies the plurality of bands supported by the base station, the generation unit is the highest rank indicating the highest band combination having the largest number of CCs to be combined among the plurality of bands. The band combination information including band combination information may be generated. Thereby, even in the case where there is a fallback band combination that has different parameters (differences in parameters) than the top CA band combination, the user apparatus UE bases only on the fallback band combination that the parameters differ. Since the notification may be made to the station eNB, it is possible to reduce the amount of signal at the time of notifying the base station of the capability of the CA band combination.

  The generation unit may generate the band combination information when instructed by the base station, and may generate band combination information according to a conventional format when not instructed by the base station. It becomes possible to switch the format of the CA band combination information according to the capability of the base station eNB.

  In addition, the generation unit reports, from the base station, a band combination having a parameter different from a parameter corresponding to the predetermined band combination among all the band combinations having a number of CCs smaller than the number of CCs in the predetermined band combination. When it is instructed that the parameter is different from the parameter corresponding to the predetermined band combination among all the band combinations whose number of CCs is smaller than the number of CCs in the predetermined band combination, instead of the uppermost band combination information. The band combination information may be generated including information indicating a band combination having This makes it possible to efficiently report the fallback band combination having different parameters to the base station when there is a fallback band combination having different parameters from the various parameters in the uppermost CA band combination.

  Further, according to the embodiment, a reception unit that is a base station that communicates with a user apparatus in a wireless communication system supporting carrier aggregation, and receives band combination information indicating a combination of bands in carrier aggregation from the user apparatus. And a determination unit that determines a combination of bands usable in the user apparatus according to a combination of bands included in the band combination information received by the reception unit, the determination unit including: When the band combination information includes the highest-order band combination information indicating the highest-order band combination in which the number of CCs to be combined is the highest among the band combinations available for carrier aggregation in the user apparatus, the user apparatus may: The top band And aligning seen, the determining that it is possible to use all of the band combinations are CC smaller number CC number in a band combination of top-level, the base station is provided. The base station eNB provides a technique for reducing the amount of signal when the user apparatus notifies the base station of the capability of the CA band combination in a wireless communication system performing carrier aggregation.

  Further, according to the embodiment, there is provided an information notification method executed by a user apparatus communicating with a base station in a wireless communication system compatible with carrier aggregation, the band indicating a band combination usable in carrier aggregation in the user apparatus. And a transmission step of transmitting the generated band combination information to the base station, wherein the generation step combines the band combinations usable in the carrier aggregation in the user apparatus. An information notification method is provided that generates the band combination information including top band combination information indicating the highest band combination having the largest number of CCs. This information notification method provides a technique for reducing the amount of signal when the user apparatus notifies the base station of the capability of CA band combination in a wireless communication system that performs carrier aggregation.

  Further, according to an embodiment, there is provided an information receiving method executed by a base station that communicates with a user apparatus in a wireless communication system compatible with carrier aggregation, wherein a band combination indicating a combination of bands in carrier aggregation from the user apparatus is provided. The receiving step of receiving information; and a determining step of determining a combination of available bands in the user apparatus according to a combination of bands included in the band combination information received by the receiving unit, In the determination step, the band combination information includes the highest band combination information indicating the highest band combination having the largest number of CCs to be combined among the band combinations usable in carrier aggregation in the user apparatus. , The user apparatus determines that the highest order band combination and all the band combinations whose number of CCs is smaller than the number of CCs in the highest order band combination can be used. Be done. This information receiving method provides a technique for reducing the amount of signal when the user apparatus notifies the base station of the capability of CA band combination in a radio communication system that performs carrier aggregation.

<Supplementary Note>
The embodiment described above can also be described as the following additional notes.
(Supplementary Note 1)
A user apparatus that communicates with a base station in a wireless communication system supporting carrier aggregation, comprising:
A generation unit configured to generate band combination information indicating band combinations usable in carrier aggregation in the user apparatus;
A transmitter configured to transmit the generated band combination information to a base station;
The generation unit is the highest-order band combination information indicating the highest-order band combination having the largest number of CCs to be combined among the band combinations usable in carrier aggregation in the user apparatus, and non-correspondence that the user apparatus does not support User equipment device that generates the band combination information including: non-corresponding band combination information indicating a band combination.
(Supplementary Note 2)
When there is a band combination having a parameter different from the parameter corresponding to the uppermost band combination among the parameters corresponding to each of the band combinations usable in carrier aggregation in the user apparatus, the generation unit may change the different parameters The user equipment according to clause 1, generating the band combination information further including exceptional band combination information indicating a band combination having.
(Supplementary Note 3)
The generation unit is, when notified of a plurality of bands supported by the base station from the base station, a top band combination indicating the highest band combination having the largest number of CCs to be combined among the plurality of bands. Information and non-corresponding band combination information indicating non-corresponding band combination not supported by the user apparatus among the plurality of bands, and different from the parameter corresponding to the highest band combination among the plurality of bands The user apparatus according to claim 2, generating the band combination information including exceptional band combination information indicating a band combination having a parameter.
(Supplementary Note 4)
The generation unit generates the band combination information when instructed by the base station, and generates band combination information according to a conventional format when not instructed by the base station. User equipment described in.
(Supplementary Note 5)
A base station that communicates with a user apparatus in a wireless communication system supporting carrier aggregation, comprising:
A receiver configured to receive band combination information indicating a combination of bands in carrier aggregation from the user apparatus;
A determination unit that determines a combination of available bands in the user apparatus according to a combination of bands included in the band combination information received by the reception unit;
The determination unit further includes, in the band combination information, uppermost band combination information indicating a highest-order band combination in which the number of CCs to be combined is the largest among band combinations usable in carrier aggregation in the user apparatus; In the case where non-corresponding band combination information indicating non-corresponding non-corresponding band combination is included, the user apparatus is configured to calculate the number of CCs smaller than the number of CCs in the highest-order band combination and the highest-order band combination A base station which determines that the combination of bands other than the non-corresponding band combination is usable among all the band combinations which are.
(Supplementary Note 6)
An information notification method executed by a user apparatus communicating with a base station in a wireless communication system supporting carrier aggregation, comprising:
Generating band combination information indicating band combinations usable in carrier aggregation in the user apparatus;
And transmitting the generated band combination information to a base station.
In the generation step, the highest band combination information indicating the highest band combination having the largest number of CCs to be combined among the band combinations usable in carrier aggregation in the user apparatus, and non-correspondence which the user apparatus does not support A non-corresponding band combination information indicating a combination of bands, and generating the band combination information.
(Appendix 7)
An information receiving method executed by a base station that communicates with a user apparatus in a wireless communication system supporting carrier aggregation, comprising:
Receiving band combination information indicating a combination of bands in carrier aggregation from the user apparatus;
Determining a combination of available bands in the user apparatus according to a combination of bands included in the received band combination information;
In the determination step, the band combination information includes uppermost band combination information indicating a highest-order band combination having the largest number of CCs to be combined among band combinations usable in carrier aggregation in the user apparatus; In the case where non-corresponding band combination information indicating non-corresponding non-corresponding band combination is included, the user apparatus is configured to calculate the number of CCs smaller than the number of CCs in the highest-order band combination and the highest-order band combination The information receiving method which determines that the combination of bands other than the said non-corresponding band combination is usable among all the band combinations which are these.
(Supplementary Note 8)
A user apparatus that communicates with a base station in a wireless communication system supporting carrier aggregation, comprising:
A generation unit configured to generate band combination information indicating band combinations usable in carrier aggregation in the user apparatus;
A transmitter configured to transmit the generated band combination information to a base station;
A generation unit configured to generate band combination information including top band combination information indicating a highest order band combination having the largest number of CCs to be combined among band combinations usable in carrier aggregation in the user apparatus; .
(Appendix 9)
The generation unit is, when notified of a plurality of bands supported by the base station from the base station, a top band combination indicating the highest band combination having the largest number of CCs to be combined among the plurality of bands. Clause 9. The user equipment according to clause 8, generating the band combination information comprising information.
(Supplementary Note 10)
The user apparatus according to Appendix 8 or 9, wherein the generation unit generates the band combination information when instructed by the base station, and generates band combination information according to a conventional format when not instructed by the base station. .
(Supplementary Note 11)
The generation unit instructs, from the base station, a report of a band combination having a parameter different from a parameter corresponding to the predetermined band combination among all band combinations having a number of CCs smaller than the number of CCs in the predetermined band combination If the selected band combination information has a parameter different from the parameter corresponding to the predetermined band combination among all the band combinations having the number of CCs smaller than the number of CCs in the predetermined band combination instead of the uppermost band combination information. The user equipment according to any one of appendices 8 to 10, which generates the band combination information including information indicating band combination.
(Supplementary Note 12)
A base station that communicates with a user apparatus in a wireless communication system supporting carrier aggregation, comprising:
A receiver configured to receive band combination information indicating a combination of bands in carrier aggregation from the user apparatus;
A determination unit that determines a combination of available bands in the user apparatus according to a combination of bands included in the band combination information received by the reception unit;
The determination unit is configured such that, when the band combination information includes the highest-order band combination information indicating the highest-order band combination with the largest number of CCs to be combined among the band combinations usable in carrier aggregation in the user apparatus A base station that determines that the user apparatus can use the uppermost band combination and all band combinations that have a smaller number of CCs than the number of CCs in the uppermost band combination;
(Supplementary Note 13)
An information notification method executed by a user apparatus communicating with a base station in a wireless communication system supporting carrier aggregation, comprising:
Generating band combination information indicating band combinations usable in carrier aggregation in the user apparatus;
And transmitting the generated band combination information to a base station.
Information notification that generates, in the generation step, the band combination information including the highest order band combination information indicating the highest order band combination having the largest number of CCs to be combined among the band combinations usable in carrier aggregation in the user apparatus Method.
(Supplementary Note 14)
An information receiving method executed by a base station that communicates with a user apparatus in a wireless communication system supporting carrier aggregation, comprising:
Receiving band combination information indicating a combination of bands in carrier aggregation from the user apparatus;
Determining a combination of available bands in the user apparatus according to a combination of bands included in the received band combination information;
In the determination step, when the band combination information includes the highest band combination information indicating the highest band combination having the largest number of CCs to be combined among the band combinations usable in the carrier aggregation in the user apparatus The information receiving method, wherein the user apparatus determines that the highest order band combination and all band combinations having a number of CCs smaller than the number of CCs in the highest order band combination are usable.

<Supplement of embodiment>
The method claims present elements of the various steps in a sample order, and are not limited to the specific order presented, unless explicitly stated in the claims.

  As described above, the configuration of each device (user device UE / base station eNB) described in the embodiment of the present invention is realized by executing a program by a CPU (processor) in the device including a CPU and a memory. It may be a configuration, or may be a configuration realized by hardware such as a hardware circuit provided with the logic of the processing described in this embodiment, or even if programs and hardware are mixed Good.

  Although the embodiments of the present invention have been described above, the disclosed invention is not limited to such embodiments, and those skilled in the art should understand various modifications, modifications, alternatives, replacements, and the like. I will. Although specific numerical examples are used to facilitate understanding of the invention, unless otherwise noted, those numerical values are merely examples and any appropriate values may be used. The division of items in the above description is not essential to the present invention, and the items described in two or more items may be used in combination as necessary, and the items described in one item may be used in another item. It may be applied to the matters described in (unless contradictory). The boundaries of the functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries of physical parts. The operations of multiple functional units may be physically performed by one component, or the operations of one functional unit may be physically performed by multiple components. The sequences and flowcharts described in the embodiments may be rearranged as long as there is no contradiction. Although the user equipment UE / base station eNB has been described using a functional block diagram for convenience of the processing description, such an apparatus may be realized in hardware, software or a combination thereof. The software operated by the processor of the user apparatus UE according to the embodiment of the present invention and the software operated by the processor of the base station eNB according to the embodiment of the present invention are random access memory (RAM), flash memory, read only It may be stored in memory (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, CD-ROM, database, server or any other suitable storage medium.

  In each embodiment, “CA band combination information” or “band combination information” is an example of band combination information. The “information indicating the highest CA band combination” is an example of the highest band combination information. “Information indicating non-correspondence fallback band combination” is an example of non-correspondence band combination information. In addition, “information of fallback band combination in which only parameters different from the uppermost CA band combination among various kinds of parameters are set” is an example of exceptional band combination information. Also, "CAbandwidthclass" is an example of a CA bandwidth class.

UE User Equipment eNB Base Station 101 DL Signal Reception Unit 102 UL Signal Transmission Unit 103 UE Capability Information Storage Unit 104 Generation Unit 201 DL Signal Transmission Unit 202 UL Signal Reception Unit 203 CA Band Combination Information Storage Unit 204 UE Capability Determination Unit 1001 Processor 1002 Memory 1003 Storage 1004 Communication device 1005 Input device 1006 Output device

Claims (6)

A user apparatus for communicating with a base station in a wireless communication system supporting communication by a plurality of cells, comprising:
A generation unit configured to generate band combination information indicating band combinations usable in communication by a plurality of cells in the user apparatus;
A transmitter configured to transmit the generated band combination information to a base station;
The generation unit requests the base station to exclude, from each of the band combinations included in a predetermined plurality of band combinations, a report of a band combination having a number of CCs smaller than the number of CCs in each of the band combinations. If you
Generating band combination information in which band combinations having a number of CCs smaller than the number of CCs in each of the band combinations are excluded from the respective band combinations included in the predetermined plurality of band combinations,
The plurality of cells include at least one NR cell, and the generated band combination information includes at least one band corresponding to the NR cell. The predetermined plurality of band combinations are band combinations that are equal to or less than a maximum value indicating a predetermined bandwidth,
The user apparatus according to claim 1, wherein the maximum value is determined by a sum of CA bandwidth classes, the number of resource blocks, or the number of carrier frequencies.   A band combination having a number of CCs less than the number of CCs in each of the band combinations is defined by being removed from a certain band combination by CA bandwidth class unit or from a certain band combination by CC unit. The user apparatus according to 1). A base station that communicates with a user apparatus in a wireless communication system supporting communication by a plurality of cells,
A receiver configured to receive band combination information indicating a combination of bands in communication by a plurality of cells from the user apparatus;
A determination unit that determines a combination of available bands in the user apparatus according to a combination of bands included in the band combination information received by the reception unit;
Among the band combinations included in a predetermined plurality of band combinations, there is a transmitter configured to request the user apparatus for a report in which the band combinations having a smaller number of CCs than the number of CCs in each of the band combinations are excluded. And
The plurality of cells include at least one NR cell, and the received band combination information includes at least one band corresponding to the NR cell. An information notification method executed by a user apparatus communicating with a base station in a wireless communication system supporting communication by a plurality of cells, comprising:
Generating band combination information indicating band combinations usable for communication by a plurality of cells in the user apparatus;
And transmitting the generated band combination information to a base station.
In the generation step, the base station is requested to exclude, from each of the band combinations included in a predetermined plurality of band combinations, a report of band combinations having a number of CCs smaller than the number of CCs in each of the band combinations. And generating band combination information from which a report of band combinations having a smaller number of CCs than the number of CCs in each of the band combinations is excluded among the band combinations included in the predetermined plurality of band combinations,
The plurality of cells include at least one cell of NR, and the generated band combination information includes at least one band corresponding to the cell of NR. An information receiving method executed by a base station communicating with a user apparatus in a wireless communication system supporting communication by a plurality of cells, comprising:
Receiving band combination information indicating combination of bands in communication by a plurality of cells from the user apparatus;
A determination step of determining a combination of available bands in the user apparatus according to a combination of bands included in the received band combination information;
The user apparatus has a transmission step of requesting a report in which band combinations having a smaller number of CCs than the number of CCs in each of the band combinations among the band combinations included in a predetermined plurality of band combinations are excluded. And
The plurality of cells may include at least one NR cell, and the received band combination information may include at least one band corresponding to the NR cell.

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