RU2811982C1 - Terminal and base station equipment - Google Patents

Abstract

FIELD: transmission media.

SUBSTANCE: configuration number of component carriers for the second base station apparatus, selected from the first base station apparatus and the second base station apparatus used for dual connection, is transmitted to the first base station apparatus, wherein said configuration number is transmitted from the first base station apparatus to the second base station apparatus. The transmission includes transmitting a user terminal assistance information message (UEAssistanceInformation) including an OverheatingAssistance IE information element that includes the specified configuration number.

EFFECT: reduction in the configuration volume during transmission in a wireless communication system.

6 cl, 22 dwg

Description

Field of technology to which the invention relates

[0001] The present invention relates to a terminal in a wireless communication system and a base station apparatus.

State of the art

[0002] The NR (New Radio) system, the successor system to the LTE (Long Term Evolution) standard (also called "5G"), is introducing and further considering technologies that satisfy requirements such as high system throughput, high data transfer speed, low latency, simultaneous connection of multiple terminals, low cost and energy saving.

[0003] On the other hand, to suppress overheating when the user terminal generates heat, overheating assistance information is specified for LTE version 14, which reports the peak rate (user equipment (UE) category) and the recommended value of the number of secondary cells (SCell, from the English Secondary Cell) in carrier aggregation from the user terminal. It is expected that the value reported by the overheating auxiliary information will be lower than the normal state before heating.

[0004] In version 15, the overheating support information applies to dual connection of the new radio system (EN-DC, from E-UTRAN New Radio - Dual Connectivity) (Non-Patent Document 1 and Non-Patent Document 2). In particular, in the case of EN-DC, each of the reported reducedCCsDL and reducedCCsUL is expanded to include (P)SCell for both LTE and NR (Non-Patent Document 1 and Non-Patent Document 2).

[0005] The base station apparatus (eNB) receives the overheating assistance information from the UE performing EN-DC, and obtains the number of SCells of downlink (DL, Downlink) and uplink (UL, Uplink) required by the user terminal based on the reducedCCsDL and reducedCCsUL.

[Prior Art Documents]

[Non-patent documents]

[0006] Non-patent document 1. 3GPP TS 38.331 V15.9.0 (2020-03)

Non-patent document 2. 3GPP TS 36.331 V15.9.0 (2020-03)

Non-patent document 3. 3GPP TS 37.340 V15.8.0 (2019-12)

Disclosure of the invention

[Problem solved by the invention]

[0007] However, in the prior art described in Non-Patent Documents 1 and 2, there is a problem in EN-DC that the number of SCells to be deleted in the gNB is unknown because there is no means of notifying the number of SCells to be deleted from eNB to gNB.

[0008] In addition, the above problem may arise not only for EN-DC, but also for dual connection (DC, from the English Dual Connectivity) in general. The above problem may also occur with respect to the configuration volume (eg, bandwidth), which is not limited to the number of SCells.

[0009] The present invention has been made in view of the above and is intended to provide in a wireless communication system a technology that allows a secondary node in a dual connection to know the configuration volume to be reduced.

[Remedy]

[0010] According to the disclosed technology, there is provided a base station apparatus configured to operate as a first base station apparatus in a communication system including a first base station apparatus and a second base station apparatus configured to communicate with a terminal through a dual connection containing:

a receiving unit configured to receive from the terminal a total configuration volume, which is a configuration volume reduced to eliminate overheating of the terminal, and is a configuration volume for both the first base station apparatus and the second base station apparatus;

a control unit configured to determine, based on the total configuration volume, a configuration volume for the first base station apparatus and a configuration volume for the second base station apparatus; And

a transmission unit configured to transmit the configuration volume for the second base station apparatus to the second base station apparatus.

[Technical result of the invention]

[0011] With the disclosed technology, it is possible for a secondary node in a dual connection to know the configuration volume to be reduced in a wireless communication system.

Brief description of drawings

[0012] In FIG. 1 is a diagram for explaining a wireless communication system according to one embodiment of the present invention;

in fig. 2 is a diagram for explaining a wireless communication system according to one embodiment of the present invention;

in fig. 3 shows the sequence diagram for Example 1;

in fig. 4 is a block diagram for Example 1;

in fig. 5 is a diagram showing an example of specification modification;

in fig. 6 is a diagram showing an example of specification modification;

in fig. 7 shows the sequence diagram for Example 2;

in fig. 8 is a diagram showing an example of specification modification;

in fig. 9 is a diagram showing an example of specification modification;

in fig. 10 is a diagram showing an example of specification modification;

in fig. 11 is a diagram showing an example of specification modification;

in fig. 12 is a diagram showing an example of specification modification;

in fig. 13 is a diagram showing an example of specification modification;

in fig. 14 is a diagram showing an example of specification modification;

in fig. 15 is a sequence diagram for Example 3;

in fig. 16 is a diagram showing an example of specification modification;

in fig. 17 is a diagram showing an example of specification modification;

in fig. 18 is a diagram showing an example of specification modification;

in fig. 19 is a diagram showing an example of specification modification;

in fig. 20 shows an example of the functional configuration of the base station apparatus 10 according to one embodiment of the present invention;

in fig. 21 shows an example of a functional configuration of a user terminal 20 according to one embodiment of the present invention;

in fig. 22 is a diagram illustrating an example of a hardware configuration of a base station apparatus 10 or a user terminal 20 according to one embodiment of the present invention.

Carrying out the invention

[0013] Next, embodiments of the present invention will be described with reference to the drawings. The embodiments disclosed below are examples, and the embodiments to which the present invention applies are not limited to the following embodiments.

[0014] When operating a wireless communication system according to one embodiment of the present invention, existing technologies are used where required. Existing technologies include, for example, the existing LTE and NR technologies. The wireless communication system (base station apparatuses 10A and 10B and user terminal 20) according to the present embodiment generally operates in accordance with the existing specification (eg, Non-Patent Documents 1 and 2). However, to solve existing problems, the base station apparatus 10A and 10B and the user terminal 20 also perform operations that are not included in the existing specifications. The description of the Examples, which will be disclosed below, generally discloses transactions that are not included in the existing provisions.

[0015] In embodiments of the present invention, the duplex transmission method may be a Time Division Duplex (TDD) method, a Frequency Division Duplex (FDD) method, or any other method (for example, flexible duplex). transmission (Flexible Duplex), etc.).

[0016] In one embodiment of the present invention, "configurable wireless parameter, etc." may mean that a certain value is preconfigured, or that a wireless parameter reported by the base station apparatus 10 or the user terminal 20 is configured.

[0017] In this embodiment, the description generally refers to EN-DC, but the present invention is applicable to DC in general, not limited to EN-DC. In this embodiment, the number of SCells and the bandwidth are specified as examples of the configuration volume to be reduced to solve the heating problem of the terminals. However, the present invention is applicable to any configuration volume not limited by the number of SCells and bandwidth.

[0018] (System Configuration)

[0019] In FIG. 1 is a diagram illustrating a wireless communication system according to one embodiment of the present invention. As shown in FIG. 1, the wireless communication system in the embodiment of the present invention includes a base station apparatus 10 and a user terminal 20. In FIG. 1, a single base station apparatus 10 is shown for convenience in illustrating the basic principle for the base station apparatus 10 and the user terminal 20. In this embodiment, the main interest is in the dual connectivity configuration (DC), which will be discussed below.

[0020] Base station apparatus 10 is a communications device that provides one or more cells and communicates wirelessly with user terminal 20. Physical radio signal resources are defined in the time and frequency domains.

[0021] Orthogonal frequency division multiplexing (OFDM) is used as a wireless access method. In the frequency domain, subcarrier spacing (SCS) supports, for example, 15 kHz, 30 kHz, 120 kHz, 240 kHz, etc. In addition, resource blocks are constructed with a given number of consecutive subcarriers (eg, 12) regardless of SCS.

[0022] Also in the time domain, slots or subframes are configured with a plurality of OFDM symbols (eg, 14 symbols per slot regardless of subcarrier spacing). The OFDM symbol is hereinafter referred to as a “symbol”. A slot or subframe is a scheduling block. A frame consisting of 10 subframes is defined.

[0023] As shown in FIG. 1, the base station apparatus 10 transmits downlink (DL) control information or data to the user terminal 20 and receives uplink (UL) control information or data from the user terminal 20. Both the base station apparatus 10 and the user terminal 20 are configured to form beams for transmitting and receiving signals. In addition, both the base station apparatus 10 and the user terminal 20 may employ Multiple Input Multiple Output (MIMO) communication for DL or UL. The base station apparatus 10 and the user terminal 20 can communicate through a secondary cell (SCell, from the English Secondary Cell) and a primary cell (PCell, from the English Primary Cell) through carrier aggregation (CA, Carrier Aggregation).

[0024] The user terminal 20 is a communication device having a wireless communication function, such as a smartphone, a cell phone, a tablet, a wearable terminal, a machine-to-machine (M2M) communication module, and the like. As shown in FIG. 1, the user terminal 20 uses various communication services provided by the wireless communication system by receiving control information or data in DL from the base station apparatus 10 and transmitting control information or data in UL to the base station apparatus 10. The user terminal may be referred to as a "terminal".

[0025] In FIG. Figure 2 shows an example of a wireless communication system configuration when performing dual connection (DC). As shown in FIG. 2, a base station apparatus 10A which serves as a master node (MN, Master Node), and a base station apparatus 10B which serves as a secondary node (SN, Secondary Node) are provided. The base station apparatus 10A and the base station apparatus 10B are each connected to a core network. The user terminal 20 communicates with both the base station apparatus 10A and the base station apparatus 10B.

[0026] The group of cells provided by the base station apparatus 10A, which is the MN, is called the master cell group (MCG), and the group of cells provided by the base station apparatus 10B, which is the SN, is called the secondary cell group ( SCG, from English Secondary Cell Group). The MCG includes only a PCell or a PCell and at least one SCell. The SCG may include only a PSCell or a PSCell and one or more hundred SCells. PSCell is one of the SCell types.

[0027] Operation according to the present embodiment is carried out by configuring the DC in FIG. 2. DC may be NE-DC, EN-DC or NR-DC. However, in this embodiment, the case of EN-DC is disclosed as an example.

[0028] In the configuration shown in FIG. 2 as EN-DC, the base station apparatus 10A serving as the MN is called an eNB, and the base station apparatus 10B serving as the SN is called a gNB. In this embodiment, SCell and component carrier (CC) are used interchangeably. In the following description, the base station apparatus 10A is referred to as MN 10A, and the base station apparatus 10B is referred to as SN 10B. The user terminal 20 is called UE 20.

(Tasks)

[0029] As disclosed above, overheating support information for LTE is defined in Release 14, which reports the peak rate (UE category) and the recommended value of SCells in the carrier aggregation from the UE 20 to suppress overheating if the UE 20 overheats.

[0030] Additionally, in version 15, the function has been expanded so that the overheating assistance information can be applied to the EN-DC. In particular, in the case of EN-DC, the extension is made such that the reported reducedCCsDL and reducedCCsUL contain (P)SCell for both LTE and NR. The portion of Non-Patent Document 2 containing the description of the extension is as follows.

[0031] reducedCCsDL

Indicates the UE's preference for a reduced configuration corresponding to the maximum number of downlink SCells specified in the field to eliminate overheating. This maximum number includes both SCells for E-UTRA and PSCells/SCells for NR in (NG)EN-DC.

reducedCCsUL

Indicates the UE's preference for a reduced configuration corresponding to the maximum number of uplink SCells specified in the field to eliminate overheating. This maximum number includes both SCells for E-UTRA and PSCells/SCells for NR in (NG)EN-DC.

The MN 10A can obtain the number of SCells in UL and DL required by the user terminal 20 based on reducedCCsDL and reducedCCsUL by receiving the overheating auxiliary information including the above information from the UE 20 in which the EN-DC is configured.

[0032] When stopping the EN-DC (when removing the SCG), the MN 10A may reduce the number of SCells to the number reported by the user terminal 20, since only the CA for LTE needs to be considered.

[0033] On the other hand, since existing provisions do not have the ability to communicate the number of SCells by the node MN 10A to the SN 10B, when attempting to reduce the number of SCells to the number of SCells required by the user terminal 20 by removing the SCells for LTE and the SCells for NR when configuring EN-DC, the SN 10B node does not know how many SCells to cut.

[0034] For example, in a state in which the UE 20 performing EN-DC is configured with five SCells for LTE and NR in total, when the MN 10A is requested by the UE 20 to reduce the SCells to two SCells, three cells need to be deleted SCell for LTE and NR. For example, if MN10A removes one SCell for LTE, then SN 10B should remove two SCells for NR, but it is not possible in the prior art to communicate this from MN 10A to SN 10B.

[0035] Hereinafter, examples of specific techniques for solving the above problems will be disclosed in Examples 1-3. In any of Examples 1-3, processing for the SCell in DL and processing for the SCell in UL may be performed in separate sequences, or processing for the SCell in DL and processing for the SCell in UL may be performed simultaneously. Moreover, in any of Examples 1-3, the sequence includes a SCell reduction process, but the sequence for actually SCell reduction is not shown. Specific SCell reduction processes may be performed using, for example, existing technology disclosed in Non-Patent Document 3. Moreover, in any of Examples 1 to 3, SCell reduction processing in a sequence need not be performed at the time shown in the sequence, but may be performed at a time different from the time shown in the sequence.

(Example 1)

[0036] Example 1 will be described first. In FIG. 3 shows an example of the sequence in Example 1. In step S101, the user terminal 20 transmits the overheating auxiliary information determined in the Radio Resource Control (RRC) for LTE (Non-Patent Document 2) to the MN 10A. The overheating auxiliary information includes, as reducedCCsDL/reducedCCsUL, the maximum value of the sum of the number of SCells for LTE (MCG side) and the number of PSCells/SCells (SCG side) for each of UL and DL after SCell reduction required by the user terminal 20 to combat overheating.

[0037] In step S102, the MN 10A determines, for each of the UL and DL, the number of SCells after pruning of the side MN 10A (ie, the MCG side) based on the number of SCells received in step S101 (the maximum number of SCells after pruning). If SCells (PSCl/SCell) are to be deleted also on the SCG side, then MN 10A also for each of UL and DL determines the number of SCells after reduction on the SN 10B side (ie on the SCG side).

[0038] In step S103, the MN 10A reduces the SCells to a reduced number of SCells on the MN 10A side.

[0039] When the number of SCells after pruning on the SN 10B side (i.e., on the SCG side) is determined, in step S104, the MN 10A notifies SN 10B with a message (CG-ConfigInfo) containing the number of SCells after pruning on the SCG side for each of UL and DL.

[0040] In step S105, the SN 10B having received the CG-ConfigInfo reduces the SCells so that the number of SCells on the SCG side becomes equal to the notified number of SCells for each of the UL and DL.

[0041] With reference to the block diagram shown in FIG. 4, the process of determining the number of SCells after pruning and the like. disclosed in more detail. In fig. 4 is a block diagram aimed at DL. For UL, the same process flow as shown in FIG. 4.

[0042] In step S151, the MN 10A receives reducedCCsDL from the UE 20 via the superheat auxiliary information. reducedCCsDL includes the total number of SCells in the DL after reduction.

[0043] In step S152, MN 10A determines the total number of SCells in DL (X_DL) after reduction (summation on the MCG and SCG sides), while satisfying "X_DL reducedCCsDL < current total number of SCells in DL." That is, X_DL may be less than reducedCCsDL.

[0044] In step S153, MN 10A determines the number of SCells in DL (MCG_DL) on the MCG side after pruning, and "MCG_DL" is satisfied. X_DL". MN 10A removes SCells so that the number of SCells in the DL on the MCG side becomes MCG_DL.

[0045] In step S154, the MN 10A determines whether "(MCG_DL + current number of SCells in DL on the SCG side) > X_DL". In other words, MN 10A determines whether the sum of the number of SCells in the DL on the MCG side after pruning and the number of current SCells in the DL on the SCG side exceeds the total number of SCells in the DL (X_DL) after pruning. If the decision in step S154 is "No", then the SCell in the DL on the SCG side does not need to be deleted. Therefore processing stops. If the determination in step S154 is “Yes,” then the process proceeds to step S155.

[0046] In step S155, the MN 10A determines the number of SCells in DL (SCG_DL) on the SCG side after reduction as SCG_DL=X_DL-MCG_DL. In step S156, MN10A notifies SN 10B about SCG_DL via CG-Configlnfo.

[0047] In step S157, the SN 10B that receives the CG-Configlnfo reduces the number of SCells in the DL on the SCG side to SCG_DL. For example, if the current number of SCells in DL is 3 and SCG_DL is 1, then SN 10B removes two SCells.

[0048] The above example is an example of reducing the number of SCells for each of UL and DL, but the above process can also be applied to reduce the total bandwidth (aggregate bandwidth) of UL and DL. In the case of total bandwidth, the above number of SCells can be replaced by the total bandwidth. In addition to processing to reduce the number of SCells, processing may be performed to reduce the overall bandwidth.

[0049] The total UL bandwidth is the sum of the active bandwidth parts (BWPs) in the UL across all UL carriers. The total DL bandwidth is the sum of the active DL BWP bandwidths across all DL carriers.

[0050] The process for the total bandwidth will be disclosed in accordance with the algorithm in FIG. 4. DL is described below, but the same applies to UL.

[0051] In step S151, the MN 10A receives the maximum value of the total bandwidth for the MCG and SCG completely after reduction from the UE 20 due to the overheating auxiliary information.

[0052] In step S152, the MN 10A determines the total bandwidth (X_DL) in the DL as a whole (the sum of the MCG side and the SCG side) after reduction, while satisfying "X_DL total reduced DL bandwidth < current total DL bandwidth."

[0053] In step S153, the MN 10A determines the total DL bandwidth (MCG_DL) of the MCG side after reduction, and "MCG_DL" is satisfied. X_DL". MN 10A removes the bandwidth so that the total bandwidth in the DL on the MCG sides becomes MCG_DL.

[0054] In step S154, the MN 10A determines whether "(MCG_DL + current total DL bandwidth on the SCG side) > X_DL" satisfies. That is, the MN 10A determines whether the sum of the reduced total bandwidth of the MCG DL and the current total bandwidth of the SCG DL is greater than the reduced total bandwidth of the DL (X_DL). If the determination in step S154 is "No", then the total bandwidth in the DL on the SCG side does not need to be deleted. Therefore processing stops. If the determination in step S154 is “Yes,” then the process proceeds to step S155.

[0055] In step S155, the MN 10A determines the total DL bandwidth (SCG_DL) on the SCG side after reduction as SCG_DL=X_DL-MCG_DL. In step S156, the MN 10A notifies the SN 10B of the SCG_DL via CG-Configlnfo.

[0056] In step S157, the SN 10B receiving the CG-Configlnfo reduces the total DL bandwidth on the SCG side to SCG_DL. For example, if the current total bandwidth in DL is 100 M and SCG_DL is 50 M, then SN 10B removes 50 M bandwidth.

[0057] Next, an example of changing the SCell abbreviation specification will be disclosed. As for the specification change example, in Examples 1 to 3, the UE 20, MN 10A, and SN 10B perform operations based on the changed specification.

<Example 1: Specification Change Example>

[0058] In FIG. 5 shows an example of changing the CG-Configlnfo message (snippet) in Non-Patent Document 1 (TS38.331). In fig. 6 shows an example of changing the descriptions of the CG-Configlnfo fields (fragment), to which the reducedCCsDL-SCG and reducedCCsUL-SCG descriptions added in FIG. 5.

(Example 2)

[0059] Next, Example 2 will be described. In FIG. 7 shows an example of the sequence in Example 2. In step S201, for each of the UL and DL, the UE 20 reports to the MN 10A the number of SCells after pruning on the MCG (LTE) side and the number of SCells after pruning on the SCG (NR) side independently (separately ).

[0060] More specifically, for each of UL and DL, the UE 20 reports to MN 10A the number of SCells after reduction on the MCG side by reducedCCsDL/ reducedCCsUL superheat auxiliary information defined in Non-Patent Document 2 (TS36.331).

[0061] In the overheating auxiliary information, reducedCCsDL contains the maximum value of the number of SCells in DL after reduction on the MCG side, and reducedCCsUL contains the maximum value of the number of SCells in UL after reduction on the MCG side.

[0062] For each of UL and DL, UE 20 reports to MN 10A the number of SCells after reduction on the SCG side by reducedCCsDL/reducedCCsUL in the Information Element (IE) OverheatingAssistance defined in Non-Patent Document 1 (TS38. 331). In this case, the UE 20 includes the OverheatingAssistance IE defined in Non-Patent Document 1 (TS38.331) in the UEAssistanceInformation message of Non-Patent Document 2 (TS36.331) and reports it to the MN 10A.

[0063] Accordingly, in step S201 in FIG. 7, UE 20 transmits to MN 10A a UEAssistanceInformation message that contains the above overheating assistance information and IE OverheatingAssistance.

[0064] In IE OverheatingAssistance, reducedCCsDL contains the maximum value of the number of SCells in the DL after reduction on the SCG side, and reducedCCsUL contains the maximum value of the number of SCells in the UL after reduction on the SCG side.

[0065] In step S202, the MN 10A obtains the SCell number after reduction from the superheat auxiliary information for each of the DL and UL, and reduces the SCell number to less than or equal to the obtained SCell number.

[0066] In step S203, MN 10A retrieves the OverheatingAssistance IE included in the UEAssistanceInformation message and forwards the OverheatingAssistance IE to SN 10B using CG-ConfigInfo.

[0067] The SN 10B that receives the CG-Configlnfo decodes the OverheatingAssistance IE in step S204 and reduces the number of SCells in the SCG for each of the DL and UL based on the reducedCCsDL/reducedCCsUL in the IE.

[0068] The above example is an example of reducing the number of SCells for each of the UL and DL, but the above procedure is also applied to reduce the total bandwidth (aggregate bandwidth) in the UL and DL. In the case of total bandwidth, the above number of SCells can be replaced by the total bandwidth. In addition to processing to reduce the number of SCells, processing to reduce the total bandwidth may be performed.

[0069] The process for the total bandwidth will be disclosed in accordance with the process flow of FIG. 7. In step S201, for each of the UL and DL, the UE 20 reports to the MN 10A the maximum value of the total bandwidth after reduction on the MCG side (LTE) and the maximum value of the total bandwidth after reduction on the SCG side (NR) independently (separately).

[0070] More specifically, for each of the UL and DL, the UE 20 reports to the MN 10A the total bandwidth after reduction on the MCG side, for example, through the overheating auxiliary information.

[0071] For each of the UL and DL, respectively, the UE 20 reports to the MN 10A the total bandwidth after reduction of the SCG side, for example, by means of the IE OverheatingAssistance defined in Non-Patent Document 1 (TS38.331). In this case, UE 20 includes the OverheatingAssistance IE defined in Non-Patent Document 1 (TS38.331) in the UEAssistance information message of Non-Patent Document 2 (TS36.331) and reports it to MN 10A.

[0072] In step S202, the MN 10A obtains the total bandwidth after reduction from the overheating auxiliary information for each of the DL and UL, and reduces the total bandwidth to less than or equal to the obtained total bandwidth.

[0073] In step S203, MN 10A retrieves the OverheatingAssistance IE included in the UEAssistanceInformation message and forwards the OverheatingAssistance IE to SN 10B using CG-ConfigInfo.

[0074] The SN 10B that receives the CG-Configlnfo obtains the total bandwidth of the SCG side for each of the DL and UL from the IE OverheatingAssistance in step S204, and reduces the total bandwidth in the SCG based on the obtained total bandwidth.

<Example 2: Examples of Specification Changes>

[0075] An example of modification of the specification for reducing the number of SCells according to Example 2 is disclosed below. FIG. 8 shows an example of a modification to “5.6.10.3 Actions Related to Transmitting a UEAssistanceInformation Message” (fragment) in Non-Patent Document 2 (TS36.331). As shown in FIG. 8, when EN-DC and nr-OverheatingAccistanceConfig(true) are set for the UE 20, the UE 20 sets the number of SCells in the DL after reduction on the MCG side to reducedCCsDL, and the number of SCells in the UL after reduction on the MCG side to reducedCCsUL. In addition, nr-OverheatingAssistance (including IE OverheatingAssistance for NR) is included in the UEAssistancelnformation message.

[0076] In FIG. 9 shows an example of a modification to a UEAssstanceInformation message (fragment) in Non-Patent Document 2 (TS36.331). In fig. 10 shows an example of modification in the UEAssistance Information field descriptions (fragment) in Non-Patent Document 2 (TS36.331).

[0077] In FIG. 11 shows an example of a modification in the OtherConfig information element (fragment) in Non-Patent Document 2 (TS36.331). In fig. 12 shows an example of modification in the OtherConfig field descriptions (fragment) in Non-Patent Document 2 (TS36.331).

[0078] In FIG. 13 shows an example of modification in the CG-Configlnfo message (fragment) in Non-Patent Document 1 (TS38.331). In fig. 14 shows an example of modification in the CG-Configlnfo field descriptions (snippet) in Non-Patent Document 1 (TS38.331).

(Example 3)

[0079] Example 3 will now be described. In FIG. 15 shows an example of the sequence in Example 3. In step S301, for each of the UL and DL, the UE 20 reports to the MN 10A the number of SCells after pruning on the MCG (LTE) side.

[0080] More specifically, for each of UL and DL, the UE 20 reports to MN 10A the number of SCells after reduction on the MCG side by reducedCCsDL/reducedCCsUL in the superheat auxiliary information defined in Non-Patent Document 2 (TS36.331).

[0081] In the overheating auxiliary information, reducedCCsDL contains the maximum value of the number of SCells in DL after reduction on the MCG side, and reducedCCsUL contains the maximum value of the number of SCells in UL after reduction on the MCG side. Heating assistance information is included in the UEAssistanceInformation message.

[0082] As will be disclosed below, the number of SCells on the SCG side is sent directly from the UE 20 to the SN 10B using SRB3. Thus, the UEAssistancelnformation on the MCG (LTE) side contains an indication indicating that the information on the SCG (NR) side is sent using SRB3. This allows MN 10A to understand that the reducedCCsDL/reducedCCsUL on the MCG side only indicates the number of SCells on the MCG side.

[0083] That is, in the existing specification, in the case of EN-DC, reducedCCsDL/reducedCCsUL also contains PSell and SCell cell(s) for SCG NR. Therefore, the notice of this direction clearly indicates that the operation is different from the operation in the existing specification.

[0084] In step S302, the MN 10A obtains the number of SCells after reduction from the superheat auxiliary information for each of the DL and UL, and reduces the number of SCells to less than or equal to the obtained number of SCells.

[0085] In step S303, for each of UL and DL, UE 20 reports to SN 10B the number of SCells after reducing the SCG side by reducedCCsDL/reducedCCsUL from the OverheatingAssistance IE defined in Non-Patent Document 1 (TS38.331).

[0086] More specifically, the UE 20 transmits a UEAssistancelnformation message containing the OverheatingAssistance IE defined in Non-Patent Document 2 (TS38.331) directly to the SN 10B using the SRB3. In IE OverheatingAssistance, reducedCCsDL contains the maximum value of the number of SCells in DL after reduction on the SCG side, and reducedCCsUL contains the maximum value of the number of SCells in UL after reduction on the SCG side.

[0087] The SN 10B that receives the OverheatingAssistance IE decodes the OverheatingAssistance IE in step S304 and reduces the number of SCells in the SCG for each of the DL and UL based on the reducedCCsDL/reducedCCsUL in the given IE.

[0088] The above example is an example of reducing the number of SCells for UL and DL, but the above procedure is also applied to reduce the total bandwidth (aggregate bandwidth) in UL and DL. In the case of total bandwidth, the above number of SCells can be replaced by the total bandwidth. In addition to processing to reduce the number of SCells, processing to reduce the total bandwidth may be performed.

[0089] The process for the total bandwidth will be disclosed in accordance with the diagram in FIG. 15. In step S301, for each of the UL and DL, the UE 20 reports to the MN 10A, for example, the total bandwidth after reduction on the MCG (LTE) side through the overheating auxiliary information.

[0090] In step S302, the MN 10A obtains the total MCG-side reduction bandwidth from the overheating auxiliary information for each of the DL and UL, and reduces the total bandwidth to be equal to or less than the obtained bandwidth.

[0091] In step S303, the UE 20 reports the total bandwidth after reduction of the SCG side for each of the UL and DL in the SN 10B by SRB3, for example, by the IE OverheatingAssistance defined in Non-Patent Document 1 (TS38.331).

[0092] The SN 10B receiving the OverheatingAssistance IE decodes the OverheatingAssistance IE in step S304 and reduces the total bandwidth in the SCG for each of the DL and UL based on the reduced total bandwidth after reducing the SCG side of the IE.

<Example 3: Examples of Specification Changes>

[0093] An example of modifying the specification to reduce the number of SCells according to Example 3 will be disclosed. In FIG. 16 shows an example of a modification for “5.6.10.3 Actions Related to Transmitting a UEAssistanceInformation Message” (fragment) in Non-Patent Document 2 (TS36.331). As shown in FIG. 16, when the EN-DC is configured and the SRB3 is configured to transmit overheating auxiliary information for the SCG side to the UE 20, the UE 20 sets the number of SCells in the DL after the reduction of the MCG side to be reducedCCsDL and sets the number of SCells in the UL after the reduction of the MCG side to be reducedCCsUL . Also, the UE 20 sets nr-OverheatingAssistanceSRB3 corresponding to the above indication to TRUE.

[0094] In FIG. 17 shows an example of a modification of the UEAssistancelnformation message (snippet) in Non-Patent Document 2 (TS36.331). In fig. 18 shows an example of modification in the UEAssistanceInformation field descriptions (fragment) in Non-Patent Document 2 (TS36.331). In fig. 19 shows an example of a modification to UEAssistanceInformation (snippet) in Non-Patent Document 1 (TS38.331).

[0095] In any of the above Examples 1-3, in a wireless communication system, it becomes possible that a secondary node in a dual connection can know the configuration volume to be reduced.

(Hardware Configuration)

[0096] Next, an example of the functional configuration of the base station apparatus 10 and the user terminal 20 that perform the above-disclosed processing and operations will be disclosed.

<Base station apparatus 10>

[0097] In FIG. 20 is a diagram illustrating an example of a functional configuration of the base station apparatus 10. The base station apparatus 10 may be used as MN 10A or SN 10B. As shown in FIG. 20, the base station apparatus 10 includes a transmission unit 110, a receiving unit 120, a configuration unit 130, and a control unit 140. The functional configuration shown in FIG. 20 is just one example. As long as the operation according to the embodiments of the present invention can be performed, the function category and the name of the function block can be anything. The transmitting unit 110 and the receiving unit 120 may be collectively referred to as a communication unit.

[0098] The transmission unit 110 includes a function of generating a signal to be transmitted to the user terminal 20 side and transmitting the signal wirelessly. The receiving unit 120 includes a function of receiving various signals transmitted from the user terminal 20 and deriving, for example, higher layer information from the received signals. The transmission unit 110 has a function of transmitting NR-PSS, NR-SSS, NR-PBCH and DL/UL control signals, DCI on PDCCH, PDSCH data and the like. to user terminal 20.

[0099] The transmission unit 110 includes a function for transmitting signals (messages) to other base station apparatuses, and the control unit 120 includes a function for receiving signals (messages) from other base station apparatuses.

[0100] The configuration unit 130 stores preconfigured configuration information and various configuration information to be transmitted to the user terminal 20 in a storage device provided by the configuration unit 130, and reads the preconfigured configuration information from the storage device as necessary.

[0101] The control unit 140 schedules DL reception or UL transmission for the user terminal 20 via the transmitting unit 110. The control unit 140 also includes a function for determining the reduced configuration volume in the MCG and the reduced configuration volume in the SCG. In addition, the control unit 140 can perform processing such as SCell reduction, bandwidth reduction, etc. to a given reduced configuration volume. A function block related to transmitting a signal in the control block 140 may be included in the transmission block 110, and a function block related to receiving a signal in the control block 140 may be included in the receiving block 120. The transmitting unit 110 may be referred to as a transmitter, and the receiving unit 120 may be referred to as a receiver.

<User terminal 20>

[0102] In FIG. 21 is a diagram illustrating an example of a functional configuration of the user terminal 20. As shown in FIG. 21, the user terminal 20 includes a transmitting unit 210, a receiving unit 220, a configuration unit 230, and a control unit 240. The functional configuration shown in FIG. 21 is just one example. If the operation according to the embodiments of the present invention can be performed, the functional category and the name of the functional block can be any. The transmitting unit 210 and the receiving unit 220 may be collectively referred to as a communication unit. The user terminal 20 may be referred to as a terminal.

[0103] The transmission unit 210 creates a transmission signal from the transmission data and transmits the transmission signal wirelessly. The receiving unit 220 receives various signals wirelessly and obtains signals from higher layers from the received physical layer signal. The receiving unit 220 has a function for receiving NR-PSS, NR-SSS, NR-PBCH and DL/UL/SL control signals transmitted from the base station apparatus 10, DCI on the PDCCH, data on the PDSCH, and the like. For example, transmission unit 210 may transmit a Physical Sidelink Control Channel (PSCCH), a Physical Sidelink Shared Channel (PSSCH), a Physical Sidelink Discovery Channel (PSDCH), a direct connection broadcast channel (PSBCH, Physical Sidelink Broadcast Channel), etc. to another user terminal 20 as D2D (Device-to-Device) communication, and the receiving unit 120 can receive channels PSCCH, PSSCCH, PSDCH, PSDCH or PSBCH, etc. from another user terminal 20. In addition, the receiving unit 220 may perform sweeping of the receiving beam.

[0104] The configuration unit 230 stores various configuration information received from the base station apparatus 10 or other user terminals by the receiving unit 220 in a storage device provided by the configuration unit 230, and reads it from the storage device as necessary. The configuration unit 230 also stores preconfigured configuration information.

[0105] The control block 240 controls the user terminal 20. A function block related to signal transmission in the control block 240 may be included in the transmission block 210, and a function block related to signal reception in the control block 240 may be included in the block 220 reception. The transmitting unit 210 may be referred to as a transmitter, and the receiving unit 220 may be referred to as a receiver.

[Summary]

[0106] According to the present embodiment, at least the base station apparatuses and terminals presented in paragraphs 1 to 6 below are provided.

(Paragraph 1)

A base station apparatus configured to function as a first base station apparatus in a communication system including a first base station apparatus and a second base station apparatus configured to communicate with a terminal via a dual connection, comprising:

a receiving unit configured to receive from the terminal a total configuration volume, which is a configuration volume reduced to eliminate overheating of the terminal, and which is a configuration volume for both the first base station apparatus and the second base station apparatus;

a control unit configured to determine, based on the total configuration volume, a configuration volume for the first base station apparatus and a configuration volume for the second base station apparatus; And

a transmission unit configured to transmit the configuration volume for the second base station apparatus to the second base station apparatus.

(Point 2)

A base station apparatus configured to function as a first base station apparatus in a communication system including a first base station apparatus and a second base station apparatus configured to communicate with a terminal via a dual connection, comprising:

a receiving unit configured to separately receive from the terminal a first configuration volume representing a configuration volume reduced to eliminate overheating of the terminal and representing a configuration volume for the first base station apparatus, and a second configuration volume representing a configuration volume reduced to eliminate overheating terminal, and representing a configuration volume for the second base station apparatus; And

a transmission unit configured to transmit the second configuration volume to the second base station apparatus.

(Point 3)

The base station apparatus disclosed in claim 1 or 2, wherein the configuration volume is the number of secondary cells (Scells) or bandwidth.

(Point 4)

A terminal communicating with a first base station apparatus and a second base station apparatus via a dual connection, comprising:

a transmission unit configured to separately transmit to the first base station apparatus a first configuration volume representing a configuration volume reduced to eliminate overheating of the terminal and representing a configuration volume for the first base station apparatus, and a second configuration volume representing a configuration volume reduced to eliminate overheating of the terminal, and representing a configuration volume for the second base station device;

wherein the second configuration volume is a configuration volume transmitted from the first base station apparatus to the second base station apparatus.

(Clause 5)

A terminal communicating with a first base station apparatus and a second base station apparatus via a dual connection, comprising:

a transmission unit configured to transmit to the first base station apparatus a first configuration volume, which is a configuration volume reduced to eliminate overheating of the terminal, and which represents a configuration volume for the first base station apparatus, and capable of transmitting a second configuration volume to a second base station apparatus , which is a configuration volume reduced to eliminate overheating of the terminal, and which is a configuration volume for the second base station apparatus.

(Clause 6)

The terminal disclosed in claim 4 or 5, wherein the configuration capacity is the number of secondary cells (Scells) or bandwidth.

[0107] According to any one of claims 1 to 6, a technology is provided for allowing a secondary node in a dual connection to know the configuration volume to be reduced in a wireless communication system.

(Hardware configuration)

[0108] The block diagrams (FIG. 20 and FIG. 21) used in the description of the embodiment disclosed above illustrate a functional block block. Such functional blocks (parts of configuration) are obtained by at least one arbitrary combination of hardware and software. Moreover, the method of obtaining each of the functional blocks is not particularly limited. That is, each of the functional blocks can be obtained using a single device that is physically or logically connected by directly or indirectly (e.g., wired, radio, etc.) connecting two or more devices that are physically or logically separated , and by using so many devices. A functional block may be obtained by combining a single device disclosed above or a plurality of devices disclosed above with software.

[0109] The function includes determining, judging, calculating, calculating, processing, inferring, examining, searching, checking, receiving, transmitting, issuing, accessing, allowing, selecting, selecting, establishing, comparing, guessing, waiting, assuming, broadcasting transmission, notification, interaction, forwarding, configuration, reconfiguration, localization (display), assignment, etc. For example, the functional block (part of the configuration) that provides transmission is called a transmission block or transmitter. As disclosed above, the method for providing them is not particularly limited.

[0110] For example, base station apparatus 10, user terminal 20, etc. in one embodiment of the present invention may function as a computer for performing processing of the radio communication method according to the present invention. In fig. 22 is a diagram illustrating an example of the hardware configuration of the base station apparatus 10 and the user terminal 20 according to one embodiment of the present invention. The base station apparatus 10 and user terminal 20 disclosed above may be physically implemented as a computer device including a processor 1001, a memory unit 1002, an auxiliary memory unit 1003, a communication unit 1004, an input unit 1005, an output unit 1006, a bus 1007, and etc.

[0111] It should be noted that in the following description, the word “device” may be replaced by a circuit, apparatus, unit or the like. The hardware configuration of the base station apparatus 10 and the user terminal 20 may be configured to include one or a plurality of devices illustrated in the drawings, or may be configured to not include some of the devices.

[0112] Each function of the base station apparatus 10 and the user terminal 20 is provided by reading specified software on hardware such as the processor 1001 and the memory unit 1002 so that the processor 1001 performs the operation, and by controlling the communication of the unit 1004 communication or by controlling at least one of reading and writing data to the memory unit 1002 and the auxiliary storage unit 1003.

[0113] The processor 1001, for example, controls the entire computer by controlling the operating system. The processor 1001 may be configured as a central processing unit (CPU) including an interface to peripheral equipment, a control unit, an operating unit, a register, and the like. For example, the control unit 140, control unit 240, and the like disclosed above may be provided by the processor 1001.

[0114] In addition, the processor 1001 reads a program (program code), program module, data, or the like into the memory unit 1002. from at least one of the auxiliary memory unit 1003 and the communication unit 1004 and thus performs various processing. The program is a program that allows a computer to perform at least part of the work disclosed in the above-described embodiment. For example, the control unit 140 of the base station apparatus 10 shown in FIG. 20 may be provided with a control program that is stored in the memory unit 1002 and operated by the processor 1001. Moreover, for example, the control unit 240 of the user terminal 20 shown in FIG. 21 may be provided by a control program that is stored in the memory unit 1002 and operated by the processor 1001. It has been disclosed that the various processes disclosed above are performed by a single processor 1001, but the processes may be simultaneously or sequentially performed by two or more processors 1001. The processor 1001 may be implemented on one or more chips. It should be noted that the program can be transmitted from the network via an electrical communication line.

[0115] The memory unit 1002 is a computer-readable recording medium and may be implemented, for example, by at least one of a read-only memory (ROM, Read Only Memory), an erasable programmable ROM (EPROM, an Erasable Programmable ROM), an electrically reprogrammable ROM (EEPROM) , Electrically Erasable Programmable ROM), RAM (RAM, Random Access Memory), etc. The memory block 1002 may be called a register, a cache, a main memory (main memory block), or the like. The memory unit 1002 may store a program (program code) executable for implementing a communication method according to one embodiment of the present invention, a program module, or the like.

[0116] The auxiliary memory unit 1003 is a computer-readable recording medium and may be embodied, for example, by at least one of an optical disk such as a compact disc ROM (CD-ROM), a hard disk, a floppy disk, a magneto-optical disk ( e.g., CD, Digital Versatile Disc, Blu-ray Disc (registered trademark), smart card, flash memory (e.g., card, flash drive, flash drive), floppy (registered trademark), magnetic stripes, etc. The auxiliary memory unit 1003 may be referred to as an auxiliary memory unit. The storage medium disclosed above, for example, may be a database including at least one of a memory unit 1002 and an auxiliary memory unit 1003, a server, and a suitable storage medium.

[0117] The communication unit 1004 is hardware for communicating with a computer through at least one of a wired network and a radio network (transmitting and receiving device), and is also called, for example, a network device, network controller, network card, communication module and so on. The communication unit 1004 may be configured using a high-frequency switch, a duplexer, a filter, a frequency synthesizer, and the like, for example, to implement at least one of Frequency Division Duplex (FDD) and Time Division Duplex. (TDD, Time Division Duplex). For example, transmitting/receiving antenna, amplifier, transmitting and receiving unit, transmission line interface, etc. may be implemented by communication unit 1004. In the transmitting and receiving unit, the transmitting unit and the receiving unit are installed with physical or logical separation.

[0118] The input unit 1005 is an input device for receiving external input (eg, a keyboard, mouse, microphone, switch, button, sensor, etc.). The output unit 1006 is an output device for realizing output with respect to an external side (eg, a display, a speaker, an LED lamp, etc.). It should be noted that the input block 1005 and the output block 1006 may be integrally designed (eg, a touch panel).

[0119] In addition, each of the devices, such as the processor 1001 and the memory unit 1002, may be connected by a bus 1007 to communicate regarding information. Bus 1007 may be configured using a single bus or may be configured using buses that are different for each device.

[0120] In addition, the base station apparatus 10 and the user terminal 20 may be implemented by including hardware such as a microprocessor, a digital signal processor (DSP), or an application specific integrated circuit (ASIC). , programmable logic device (PLD, Programmable Logic Device) and programmable gate array (FPGA, Field Programmable Gate Array), while some or all of these functional blocks may be implemented in hardware. For example, processor 1001 may be implemented using at least one of these hardware.

(Addition to embodiment)

[0121] As described above, an embodiment of the invention has been disclosed, but the disclosed invention is not limited to this embodiment, and various modifying examples, corrective examples, alternative examples, superseding examples, and the like will be apparent to one skilled in the art. have been described to facilitate understanding of the invention, but the numerical values are exemplary only and any appropriate values may be used unless otherwise indicated. The classification of the items in the above description is not essential to the invention, and features disclosed in two or more items may be used by combination if necessary, or a feature disclosed in one item may be applied to a feature disclosed in another item (that to the extent that there is no contradiction). The boundary between functional parts or processing parts in a functional block diagram does not necessarily correspond to the boundary between physical components. The operations of multiple functional parts may be physically performed by one component, or the operation of one functional part may be physically performed by multiple components. In the processing procedure disclosed in the embodiment, the processing order may be changed if there is no contradiction. For convenience in describing the processing, the base station apparatus 10 and the user terminal 20 have been described using a functional block diagram, but such an apparatus may be implemented in hardware, software, or a combination thereof. Each of the software controlled by the processor of the base station apparatus 10 according to an embodiment of the invention and the software controlled by the processor of the user terminal 20 according to an embodiment of the invention is stored in random access memory (RAM), flash memory, read-only memory (ROM) , Read Only Memory), EPROM (Erasable Programmable ROM), Electrically Erasable Programmable ROM (EEPROM), Register, Hard Disk Drive (HDD), Removable Disk, CD-ROM, Database, Server or any suitable recording medium.

[0122] Also, notification of information is not limited to the aspect/embodiment described in the present disclosure, but may be accomplished in other ways. For example, notification of the information may be accomplished by physical layer signaling (eg, Downlink Control Information (DCI), Uplink Control Information (UCI), higher layer signaling (eg, Radio Resource Control signaling). (RRC, Radio Resource Control), medium access control signaling (MAC, Medium Access Control), broadcast information (MIB, Master Information Block), system information block (SIB, System Information Block), other signals, or a combination thereof. RRC signaling may also be called an RRC message and may be, for example, an RRC connection setup message, an RRC connection reconfiguration message, or the like.

[0123] Each aspect/variant described in the disclosure of the present invention can be applied to a system using LTE (Long Term Evolution), LTE-A (LTE-Advanced, LTE with advanced capabilities), SUPER 3G, IMT -Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), FRA (Future Radio Access, “Future Radio Access Network”), NR (New Radio, “New Radio”), W -CDMA (Registered Trademark), GSM (Registered Trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (Registered Trademark)), IEEE 802.16 (WiMAX (Registered Trademark) ), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark) and other suitable systems, and the next generation system extended therefrom. In addition, a combination or plurality of systems (eg, a combination of at least one of LTE and LTE-A with 5G, etc.) can be used.

[0124] In a processing procedure, sequence, flow chart, or the like. of each aspect/embodiment disclosed herein, the order may be changed unless there is a conflict. For example, in the method disclosed in the present invention, the elements of the various steps are presented using an approximate order, but are not limited to the specific order presented.

[0125] Here, a specific operation that is performed by the base station apparatus 10 may in some cases be performed by the upper node. It will be appreciated that, in a network including one or more network nodes including a base station apparatus 10, various operations performed to communicate with the terminal 20 may be performed by at least one of the base station apparatus 10 and another network node other than the apparatus. 10 base station (for example, a network node can be considered, but not limited to, MME, S-GW, etc.). The above is described for the case where another network node other than the base station apparatus 10 is a single one, but a plurality of other network nodes (eg, MME and S-GW) can be combined.

[0126] Information, signal, and the like described in this disclosure may be output to a lower layer (or a higher layer) from a higher layer (or a lower layer). Information, signal, etc. can be input and output through multiple network nodes.

[0127] Information and the like that are input and output may be stored in a specific location (eg, memory), or may be controlled by a control table. Information etc. that is input and output may be rewritten, updated or edited. Displayed information, etc. can be deleted. Entered information, etc. can be transferred to another device.

[0128] The judgment in the disclosure of the present invention may be made by a value expressed by a single bit (0 or 1), may be made by a true value (Boolean value: true or false), or may be made by a numeric comparison (eg, comparison with a given value).

[0129] Whether software is referred to as software, firmware, middleware, microcode, and hardware description language or referred to by other names, software should be broadly interpreted as indicating an instruction, instruction set, code, code segment, program code, program, subroutine, program module, application, software application, software package, standard program, standard subroutine, object, executable file, thread of execution, procedure, function, etc.

[0130] Additionally, software, command, information, etc. can be sent and received through a transmission medium. For example, in the case where the software is transmitted from a website, server, or other remote source using at least one of the wire technologies (coaxial cable, fiber optic cable, twisted pair or digital subscriber line (DSL, digital subscriber line), etc. ..) and radio technology (infrared waves, microwaves, etc.), at least one of wire technology and radio technology are included in the definition of transmission medium.

[0131] The information, signal, and the like described in the disclosure of the present invention may be represented using any of various technologies. For example, data, instruction, information, signal, bit, symbol, chip and the like, which may be referred to throughout the description above, may be represented by voltage, current, electromagnetic wave, magnetic field or magnetic particles, optical field or photon or any combination of them.

[0132] It should be noted that terms described in the disclosure of the present invention and terms necessary to understand the present invention may be replaced by terms having the same or similar meaning. For example, at least one of the channels and the symbol may be a signal. In addition, the signal can be a message. In addition, a component carrier (CC) may be called a frequency carrier, a cell, a frequency carrier, or the like.

[0133] The terms “system” and “network” as used in this disclosure are used interchangeably.

[0134] In addition, the information, parameter, etc. described in the disclosure of the present invention may be represented using an absolute value, may be represented using a relative value based on a given value, or may be represented using other relevant information. For example, a radio resource may be designated by an index.

[0135] The names used in the parameters described above are not limiting names in any respect. In addition, expressions and the like using such parameters may differ from expressions explicitly disclosed in the present invention. The various channels (eg, PUSCH, PUCCH, PDCCH, etc.) and information elements may be identified by any suitable name, and thus the various names that are assigned to these various channels and information elements are not in any way limiting names .

[0136] In this disclosure, the terms "base station (BS)", "radio base station", "base station apparatus", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", “access point”, “transmission point”, “reception point”, “transmission and reception point”, “cell”, “sector”, “cell group”, “carrier”, “component carrier”, etc. can be used interchangeably. The base station may be referred to by terms such as macrocell, small cell, femtocell, and picocell.

[0137] The base station is capable of organizing one cell or multiple cells (eg, three) cells. In the case where a base station organizes multiple cells, the entire coverage area of the base station may be divided into many small areas, and each of the small areas is capable of providing communication services by a subsystem of the base station (for example, a small indoor base station (remote radio head (RRH) remote radio head) The term "cell" or "sector" refers to part of the coverage area or all of the coverage area of at least one of the base station and base station subsystems that provide communication services in the coverage area.

[0138] In the disclosure of the present invention, the terms "mobile station (MS)", "user terminal", "user equipment (UE)" and "terminal" may be used interchangeably.

[0139] A mobile station may be referred to by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, terminal, wireless terminal, remote terminal, mobile phone, user agent, mobile client, client, or other suitable terms.

[0140] At least one of a base station and a mobile station may be called a transmitting device, a receiving device, a communication unit, or the like. It should be noted that at least one of the base station and the mobile station may be a device mounted on a mobile object, the mobile object itself, or the like. The mobile object may be a vehicle (eg, a car, aircraft, etc.), may be an unmanned mobile object (eg, a drone, autonomous driving vehicle, etc.), or may be a (manned or unmanned) robot. It should be noted that at least one of the base station and the mobile station also includes a device that does not necessarily move during a communication operation. For example, at least one of the base station and the mobile station may be an Internet of Things (loT) device such as a sensor.

[0141] In addition, the base station apparatus in the present invention can be replaced by a user terminal. For example, each aspect/embodiment of the present invention may be applied to a configuration in which communication between a base station apparatus and a user terminal is replaced by communication in a plurality of user terminals 20 (eg, may be referred to as "device-to-device" (D2D). ), “vehicle - any object” (V2X, vehicle-to-everything), etc.). In this case, the function of the base station apparatus 10 disclosed above can be provided in the user terminal 20. In addition, the words “up”, “down” and the like can be replaced with words corresponding to communication between terminals (for example, “side”) . For example, an uplink channel, a downlink channel, etc. can be replaced by the communication side channel.

[0142] Similarly, the user terminal in the present invention can be replaced by a base station apparatus. In this case, the user terminal function disclosed above can be provided in the base station apparatus.

[0143] The terms “determining” and “finding” as used in the present disclosure may include various operations. “Determining” and “finding,” for example, may include “defining” and “finding” with respect to judging, calculating, calculating, processing, inferring, investigating, searching (searching, querying) (e.g., searching in a table, database or other data structure) and statements, etc. In addition, "determining" and "finding" may include "determining" and "finding" with respect to receiving (eg, receiving information), transmitting (eg, transmitting information), input, output, and accessing (eg, accessing to data in memory), etc. In addition, “defining” and “finding” may include “defining” and “finding” with respect to resolution, selection, selection, establishment, comparison, and the like. That is, “defining” and “finding” may include “defining” and “finding” with respect to any operation. In addition, the words “definition (finding)” can be replaced with the concepts “assumption”, “expectation”, “consideration”, etc.

[0144] The terms "connected" and "linked" or any variations thereof indicate any direct/direct or indirect/indirect connection or connection of two or more elements and may include the case where between two elements that are "connected" or " connected" with each other, there are one or more intermediate elements. The connection or connection between the elements may be a physical connection or a physical connection, may be a logical connection or a logical connection, or may be a combination thereof. For example, "connection" can be replaced with "access". When used in the present invention, two elements may be considered to be "connected" or "coupled" to each other by at least one of one or more electrical wires, cables and a printed electrical connection, and by way of non-limiting and non-exclusive example, using electromagnetic energy having a wavelength of the radio frequency region, microwave region, optical (visible and invisible) region, and the like.

[0145] The reference signal may also be abbreviated RS (reference signal) and may be called a pilot based on the applicable standard.

[0146] The expression "based on" used in the disclosure of the present invention does not mean "based on only" unless otherwise indicated. In other words, the expression “based on” means both “based on only” and “based on at least.”

[0147] Any reference in the disclosure of the present invention to elements using the designations “first,” “second,” or the like does not generally limit the number or order of those elements. Such notations may be used in the present invention as a convenient way to distinguish between two or more elements. Therefore, reference to a first element and a second element does not mean that there can only be two elements or that the first element necessarily precedes the second element in any way.

[0148] “Mean” in the configuration of each of the above-described devices can be replaced by “block”, “circuit”, “device”, or the like.

[0149] In the present disclosure, when the terms “include,” “including,” and variations thereof are used, such terms are to be construed as non-exclusive, as is the case with the term “comprising.” In addition, it is intended that the term “or” as used in the disclosure of the present invention is not exclusive OR.

[0150] A radio frame may be configured from one or multiple time domain frames. Each of one or multiple frames in the time domain may be referred to as a subframe. A subframe may be further configured from one or multiple slots in the time domain. The subframe may have a fixed length in time (eg 1 ms), which is independent of numerology.

[0151] Numerology may be a communication parameter applied to at least one of the transmission and reception of a particular signal or channel. The numerology, for example, may indicate at least one of subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration, specific filtering processing performed by the transceiver in the frequency domain, specific windowing processing performed by the transceiver in the time domain, and the like.

[0152] A slot may be configured of one or multiple symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbol, Single Carrier Frequency Division Multiplexing (SC-FDMA) symbol, etc. .p.) in the time domain.A slot can be a time block based on numerology.

[0153] A slot may include a plurality of mini-slots. Each of the mini-slots may be configured with one or multiple time domain symbols. In addition, a mini-slot can be called a sub-slot. A mini-slot can be configured with symbols that are smaller in number than the slot. A PDSCH (or PUSCH) transmitted in a time block larger than a mini-slot may be referred to as a Type A PDSCH (or PUSCH) mapping. A PDSCH (or PUSCH) transmitted using a mini-slot may be referred to as a PDSCH (or PUSCH) mapping. PUSCH) type B.

[0154] All of the radio frame, subframe, slot, mini-slot and symbol represent a time block at the time of signal transmission. Other designations may be used corresponding to radio frame, subframe, slot, mini-slot and symbol, respectively.

[0155] For example, one subframe may be referred to as a transmission time interval (TTI), multiple consecutive subframes may be referred to as a TTI, or one slot or one mini-slot may be referred to as a TTI. That is, at least one of the subframe and TTI may be a subframe (1 ms) in the existing LTE standard, may be a period shorter than 1 ms (eg, 1 to 13 symbols), or may be a period longer than 1 ms. It should be noted that a block representing a TTI may be called a slot, mini-slot, etc., rather than a subframe. One slot can also be called a unit time interval. The unit time interval may be different in each cell according to numerology.

[0156] Here, the TTI, for example, indicates a minimum scheduling time block in radio communication. For example, in an LTE system, a base station performs scheduling to allocate a radio resource (frequency bandwidth, transmission power, etc., which can be used in each of the user terminals 20) in a TTI block with respect to each of the terminals 20. It should be noted that the definition TTI doesn't stop there.

[0157] The TTI may be a temporary data packet transmission block (transport block), a code block, a codeword, or the like, which is subject to channel coding, or may be a scheduling processing unit, link adaptation, or the like. It should be noted that when using TTI, the time zone in which a transport block, code block, code word, etc. actually displayed (eg number of characters) may be shorter than the TTI.

[0158] It should be noted that in the case where one slot or one mini-slot is called a TTI, one or more TTIs (ie, one or more slots or one or more mini-slots) may be a minimum scheduling time block. In addition, the number of slots (number of mini-slots) constituting a minimum scheduling time block can be controlled.

[0159] A TTI having a time duration of 1 ms may be called a common TTI (TTI in LTE Rel. 8-12), normal TTI, long TTI, common subframe, normal subframe, long subframe, slot, or the like. A TTI that is shorter than a regular TTI may be called a short TTI, short TTI, partial TTI (or fractional TTI), short subframe, short subframe, minislot, subslot, slot, and the like.

[0160] It should be noted that a long TTI (eg, common TTI, subframe, etc.) may be replaced by a TTI having a time extent greater than or equal to 1 ms, and a short TTI (eg, shortened TTI, etc.) .) may be replaced by a TTI having a TTI length that is less than the TTI length of the long TTI and greater than or equal to 1 ms.

[0161] A resource block (RB, resource block) is a block for allocating time domain and frequency domain resources and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in the RB may be the same regardless of numerology, or, for example, may be equal to 12. The number of subcarriers included in the RB can be determined based on numerology.

[0162] In addition, the time domain RB may include one or multiple symbols, or may be the length of one slot, one mini-slot, one subframe, or one TTI. One TTI, one subframe, etc. may be suitably configured from one or multiple resource blocks.

[0163] It should be noted that one or more RBs may be referred to as a physical resource box (physical RB: PRB), subcarrier group (SCG), resource element group (REG), PR B pair, RB pair, and the like.

[0164] In addition, a resource block may be configured from one or multiple resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0165] A bandwidth part (BWP) (may be called a partial bandwidth or the like) may be a subset of successive shared resource blocks (RBs) for a particular numerology in a particular carrier. Here, the common RB may be indicated by an RB index based on the common carrier reference point. A PRB may be defined by a specific BWP and may be numbered within a BWP.

[0166] The BWP may include a BWP for UL (UL BWP) and a BWP for DL (DL BWP). In a UE, one or multiple BWPs may be configured within a single carrier.

[0167] At least one of the configured BWPs may be active, and the UE may not be expected to transmit and receive a given signal/channel from the active BWP. It should be noted that “cell”, “carrier”, etc. may be replaced by "BWP" in the disclosure of the present invention.

[0168] The above-described structure of a radio frame, subframe, slot, mini-slot, symbol, or the like. is just an example. For example, the configuration of the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of mini-slots included in a slot, the number of symbols and RBs included in a slot or mini-slot, the number of subcarriers included in an RB, the number of symbols in TTI, character length, cyclic prefix (CP) length, etc. can be changed in different ways.

[0169] In the disclosure of the present invention, for example, in the case of indicating nouns in the singular, the invention may include the case where the nouns are in the plural.

[0170] In the disclosure of the present invention, the term "A and B are different" may indicate that "A and B are different from each other." It should be noted that the term may indicate that "A and B are respectively different from C." The terms “separated”, “connected”, etc. can be interpreted as "being different".

[0171] Each aspect/embodiment described in the disclosure of the present invention can be used independently, can be used by combining, or can be used by changing to another state in accordance with the implementation. Moreover, notification of a given information (eg, notification that it "is X") is not limited to being done explicitly, and can be done implicitly (eg, notification of a given information is not executed).

[0172] As disclosed above, the present invention has been described in detail, but it will be apparent to one skilled in the art that the present invention is not limited to the embodiment described in the disclosure of the present invention. The present invention may be practiced in amended and modified manner without departing from the spirit and scope of the invention as defined by the claims. Therefore, the description of the present invention is for illustrative purposes and is not intended to be limiting in any way with respect to this invention.

List of reference designations

[0173] 10 base station apparatus

110 transmission block

120 receiving unit

130 configuration block

140 control unit

20 user terminal

210 transmission unit

220 receiving unit

230 configuration block

240 control unit

1001 processor

1002 storage unit

1003 auxiliary storage unit

1004 communication unit

1005 input block

1006 output block

Claims (18)

1. A base station apparatus, which is the first base station apparatus, containing: a receiving unit configured to receive from the terminal a configuration number of component carriers for a second base station apparatus selected from the first base station apparatus and the second base station apparatus used for dual connection; And a transmission unit configured to transmit said configuration number to a second base station device, wherein the receiving unit is configured to receive a user terminal assistance information message (UEAssistanceInformation) including an OverheatingAssistance IE information element that includes the specified configuration number. 2. The base station apparatus according to claim 1, wherein the configuration number is the number of secondary cells (SCell). 3. Terminal containing: a transmission unit configured to transmit to the first base station apparatus a configuration number of component carriers for the second base station apparatus selected from the first base station apparatus and the second base station apparatus used for dual connection; wherein said configuration number is a configuration number transmitted from the first base station apparatus to the second base station apparatus, and wherein the transmission unit is configured to transmit a user terminal assistance information message (UEAssistanceInformation) including an OverheatingAssistance IE information element that includes the specified configuration number. 4. The terminal according to claim 3, wherein said configuration number is a configuration number reduced to eliminate overheating of the terminal. 5. A transmission method carried out by the first base station apparatus, including: receiving from the terminal a configuration number of component carriers for a second base station apparatus selected from the first base station apparatus and the second base station apparatus used for dual connection; And transmitting the specified configuration number to the second base station device, wherein the receiving step includes receiving a user terminal assistance information message (UEAssistanceInformation) including an OverheatingAssistance IE information element that includes the specified configuration number. 6. Transmission method carried out by the terminal, including: transmitting to the first base station apparatus a configuration number of component carriers for the second base station apparatus selected from the first base station apparatus and the second base station apparatus used for dual connection; wherein said configuration number is transmitted from the first base station apparatus to the second base station apparatus, wherein the transmission step includes transmitting a user terminal assistance information message (UEAssistanceInformation) including an OverheatingAssistance IE information element that includes the specified configuration number.