User equipment, base station, and control method and program thereof

Abstract

To offer more detailed information on ability of user equipment (UE) to a network.SOLUTION: User equipment (UE) in a radio communication system, includes: reception means receiving acquisition request of capacity information in the UE from a base station to which the UE is connected; and transmission means in response to acquisition request, transmitting chipset information in regard to a chipset of radio communication which the UE mounts, to the base station.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to reporting user equipment capability information in a wireless communication system. [Background technology]

[0002] In wireless communication standards (4G, 5G, etc.) of the Third Generation Partnership Project (3GPP (registered trademark)), a UECapabilityInformation message is defined to notify a network (base station (BS), core network (CN)) of capability information possessed by a user equipment (UE) (for example, Non-Patent Documents 1 and 2). The BS grasps the radio access capability of each UE based on the above message received from each UE, and performs mobility control for each UE. [Prior art documents] [Non-patent literature]

[0003] [Non-Patent Document 1] 3GPP TS 36.331 V16.11.0, December 2022 [Non-patent document 2] 3GPP TS 38.331 V16.11.0, December 2022 Summary of the Invention [Problem to be solved by the invention]

[0004] However, even if the capability information indicated in the UECapabilityInformation message is the same, the actual capabilities may differ depending on the UE. For example, even if the above-mentioned message notified from a certain UE indicates that it has capability for a first function, the first function may not actually be available due to a malfunction or the like. For example, the first function may be usable alone, but a malfunction may occur when used in combination with a second function. Furthermore, depending on the vendor that manufactures the communication device, a given provision in the 3GPP standard may be interpreted differently. As a result, among the capabilities / functions indicated in the above-mentioned message, there may be vendor-dependent / implementation-dependent capabilities / functions (e.g., measurement of line quality) whose specific operation is not uniquely specified.

[0005] However, since the BS and CN know the capabilities of each UE based on the above messages, if the capability information indicated in the above messages is the same, they cannot perform individual control according to differences in actual capabilities. Therefore, operators (carriers) of wireless communication systems collect unique information about each UE in advance and operate the system so as to perform control that does not cause inconvenience (for example, control that is the greatest common denominator regarding the actual capabilities of each UE).

[0006] The present invention has been made in view of such problems, and aims to make it possible to provide more detailed information regarding the capabilities of a UE to a BS or a CN. [Means for solving the problem]

[0007] In order to solve the above-mentioned problems, a base station of a wireless communication system according to the present invention has the following configuration. That is, a user equipment (UE) in the wireless communication system has: A receiving means for receiving a request for acquiring capability information of the UE from a base station (BS) to which the UE is connected; a transmitting means for transmitting chipset information relating to a chipset for wireless communication installed in the UE to the BS in response to the acquisition request; With death, the wireless communication system is a system that complies with the wireless communication standard of the Third Generation Partnership Project (3GPP), the acquisition request is a UECapabilityEnquiry message; The chipset information is transmitted as one or more information elements (IEs) different from a featureGroupIndicator in a UECapabilityInformation message; When the BS receives the same output value related to downlink wireless link quality from multiple UEs that have transmitted the same featureGroupIndicator but different chipset information, the BS may control the same output value from the multiple UEs based on different handling based on their respective chipset information. Alternatively, a base station (BS) in a wireless communication system may a transmitting means for transmitting a request for acquiring capability information of a UE to a UE connected to the BS by wireless communication; a receiving means for receiving, from the UE, chipset information relating to a chipset for wireless communication mounted on the UE together with the capability information; A control means for performing mobility control for the UE based on the capability information and the chipset information; and the wireless communication system is a system that complies with the wireless communication standard of the Third Generation Partnership Project (3GPP), the acquisition request is a UECapabilityEnquiry message; The chipset information is transmitted as one or more information elements (IEs) different from the featureGroupIndicator in the UECapabilityInformation message. 、 When the BS receives the same output value related to the downlink wireless channel quality from a plurality of UEs that have transmitted the same featureGroupIndicator but different chipset information, the BS may perform control based on different handling for the same output value from the plurality of UEs based on the respective chipset information. . [Effects of the Invention]

[0008] According to the present invention, more detailed information about the capabilities of the UE can be provided to the BS and CN. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a diagram illustrating a schematic configuration of a wireless communication system. [Figure 2] FIG. 2 is a diagram illustrating the hardware configuration of a BS. [Figure 3] FIG. 1 is a diagram illustrating the hardware configuration of a UE. [Figure 4] FIG. 1 is a diagram illustrating the functional configuration of a BS. [Figure 5] FIG. 1 is a diagram illustrating the functional configuration of a UE. [Figure 6] FIG. 2 is a signaling diagram illustrating a first embodiment. [Figure 7] FIG. 10 is a signaling diagram illustrating a second embodiment. [Figure 8] FIG. 10 is a signaling diagram illustrating a third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. Note that the following embodiments do not limit the scope of the invention claimed. Although multiple features are described in the embodiments, not all of these multiple features are necessarily essential to the invention, and multiple features may be combined arbitrarily. Furthermore, in the accompanying drawings, the same reference numerals are used to designate the same or similar components, and redundant explanations will be omitted.

[0011] (First embodiment) As a first embodiment of a wireless communication system according to the present invention, a system operating based on the 3GPP (registered trademark) 4G / 5G standard will be described below as an example.

[0012] <Summary> The UECapabilityInformation message is used to notify the network (base station (BS), core network (CN)) of the capability information possessed by a user equipment (UE). However, the UECapabilityInformation message has a coarse granularity of information, and may not be able to correctly notify the actual capability information of each UE. Therefore, it is made possible for the UE to notify the BS of more accurate (fine-grained) UE capability information.

[0013] <Overall system configuration> FIG. 1 is a diagram showing a schematic configuration of a wireless communication system. The wireless communication system includes a base station (BS) 101, a user equipment (UE) 111, and a core network (CN) 121. For simplicity of explanation, in FIG. 1, only one BS 101 and one UE 111 are shown respectively. Also, a case where there is a wireless connection (shown by a broken line) between the BS 101 and the UE 111 and a wired connection (shown by a solid line) between the BS 101 and the core network 121 is shown. However, a plurality of BS 101s and UE 111s may exist in the wireless communication system respectively. Also, a part of the connection between the BS 101 and the core network 121 may be a wireless connection (for example, a wireless backhaul line, etc.).

[0014] <Hardware Configuration of BS and UE> FIG. 2 is a diagram showing the hardware configuration of the BS 101. As described above, the BS 101 is a base station based on the 4G / 5G standard.

[0015] The UE 111, in one example, is configured to include a processor 201, a ROM 202, a RAM 203, a storage device 204, a first communication circuit 205, and a second communication circuit 206. The processor 201 is a computer including one or more processing circuits such as a general-purpose CPU (central processing unit) or an ASIC (application-specific integrated circuit), and reads and executes programs stored in the ROM 202 and the storage device 204 to execute the overall processing of the device and each of the processes described later.

[0016] The ROM 202 is a read-only memory that stores information such as programs and various parameters related to the processing executed by the UE 11, and the RAM 203 functions as a workspace when the processor 201 executes a program and is a random access memory that stores temporary information. The storage device 204 is constituted by, for example, a removable external storage device or the like.

[0017] The first communication circuit 205 is a communication circuit for communicating with a UE. The communication between the BS and the UE includes control plane and user plane communication, and the control plane communication includes communication of a non-access stratum (NAS) protocol and a radio resource control (RRC) protocol. On the other hand, the second communication circuit 206 is a communication circuit for communicating with a CN. The communication between the BS and the CN includes control plane and user plane communication, and the control plane communication includes communication of a NAS protocol.

[0018] Note that although BS101 shown in FIG. 2 (and FIG. 4 described later) mainly shows what corresponds to a baseband unit (BBU), part of the first communication circuit 205 can be configured as a remote radio head (RRH).

[0019] 3 is a diagram showing a hardware configuration of the UE 111. Note that, although a smartphone is assumed as the UE 111 here, the UE 111 may be a device of another type (for example, an IoT device).

[0020] In one example, the UE 111 includes a processor 301, a ROM 302, a RAM 303, a storage device 304, a communication circuit 305, and a touch screen 306. The processor 301 is a computer including one or more processing circuits such as a general-purpose CPU (Central Processing Unit) or an ASIC (Application Specific Integrated Circuit), and performs overall processing of the device and each process described below by reading and executing programs stored in the ROM 302 or storage device 304.

[0021] The ROM 302 is a read-only memory that stores information such as programs and various parameters related to processes executed by the UE 111. The RAM 303 functions as a workspace when the processor 301 executes a program, and is a random access memory that stores temporary information. The storage device 304 is configured, for example, by a removable external storage device.

[0022] The communication circuit 305 is composed of a circuit for wireless communication compliant with a predetermined communication standard. In the following description, the 4G / 5G standard is taken as an example of the predetermined communication standard for explanation, but any communication standard used in the system configuration as shown in FIG. 1 can be applied.

[0023] Generally, the capability information is set depending on the implementation of the chipset (the modem part responsible for processing 3GPP wireless communication standards) that constitutes the communication circuit 305 mounted on the UE. The chipset is responsible for wireless measurements and transmission / reception of information with the BS. The chipset is provided in various types (model numbers) from various vendors (such as Qualcomm, MediaTek, Samsung, etc.) in a configuration incorporated in a system-on-chip (SoC) or as a discrete configuration outside the SoC.

[0024] The touch screen 306 is, for example, a touch panel display, and is a component having both a display unit for providing information to the user and a reception unit for receiving an instruction by a touch operation from the user.

[0025] <Functional Configurations of BS and UE> FIG. 4 is a diagram showing the functional configuration of the BS101. As its functions, the BS101 has, for example, a first communication control unit 401, a second communication control unit 402, a control unit 403, and a storage unit 404. Note that in FIG. 4, only the functions particularly related to the present embodiment are shown, and illustration of other various functions that the BS101 may have is omitted.

[0026] Also, the functional blocks in FIG. 4 are schematically shown, and each functional block may be integrated and realized, or may be further subdivided. Further, each function in FIG. 4 may be realized, for example, by the processor 201 executing a program stored in the ROM 202 or the storage device 204. Also, for example, it may be realized by a processor existing inside the first communication circuit 205 or the second communication circuit 206 executing a predetermined software.

[0027] The first communication control unit 401 controls wireless communication via the first communication circuit 205. That is, it controls the execution of control plane and user plane communications with the UE. The second communication control unit 402 controls wireless communication via the second communication circuit 206. That is, it executes control plane and user plane communications with the CN.

[0028] The control unit 403 controls the overall operation of the BS 101. The storage unit 404 stores various information used when the first communication control unit 401, the second communication control unit 402, and the control unit 403 perform their operations.

[0029] Fig. 5 is a diagram showing the functional configuration of UE 111. UE 111 has, as its functions, for example, a communication control unit 501, an information processing unit 502, a control unit 503, and a storage unit 504. Note that Fig. 5 shows only functions particularly related to this embodiment, and does not show various other functions that UE 111 may have. For example, if UE 111 is a smartphone, it naturally has other functions such as various input functions (touch panel, GPS receiver, camera, microphone) and various output functions (display, vibration, speaker, etc.).

[0030] 5 is a schematic diagram, and each functional block may be realized by being integrated or further subdivided. Each function in FIG. 5 may be realized, for example, by processor 301 executing a program stored in ROM 302 or storage device 304. Alternatively, each function may be realized, for example, by a processor present inside communication circuit 305 executing predetermined software.

[0031] The communication control unit 501 controls wireless communication via the communication circuit 305. Specifically, it executes wireless communication in accordance with a predetermined communication standard. In particular, if communication has not been established with a partner device (here, a base station), it executes initial access and connects (attaches) to the base station. Furthermore, if the quality of the wireless connection with the currently connected base station deteriorates, it executes handover to another base station in accordance with the standard. Furthermore, as will be described in detail later, it transmits a UECapabilityInformation message (and other accompanying messages, if necessary) to the BS 101 based on the chipset information generated by the information processing unit 502.

[0032] The information processing unit 502 collects information about the chipsets that make up the communication circuit 305 and generates chipset information. Here, it is assumed that at least one of the following information about the chipsets that make up the communication circuit 305 is collected and the chipset information is generated. Vendor identification information Hardware (HW) identification information (model number, version, etc.) Software (SW) identification information (version, etc.) Then, based on a request from the communication control unit 501, the information processing unit 502 outputs the generated chipset information to the communication control unit 501. For example, when the communication control unit 501 receives a UECapabilityEnquiry message from the BS 101, the information processing unit 502 requests the information processing unit 502 to acquire the chipset information, as will be described in detail later.

[0033] The control unit 503 controls the overall operation of the UE 111. The storage unit 504 stores various information used when the communication control unit 501, the information processing unit 502, and the control unit 503 perform their operations. The storage unit 504 also stores chipset information generated by the information processing unit 502.

[0034] <System Operation> Three modes in which capability information is notified from a UE to a BS will be described with reference to Figures 6 to 8. Although only one UE is shown in Figures 6 to 8, the BS performs the same operation for each UE.

[0035] <First Example> In the first embodiment, chipset information is added to an existing message (i.e., a UECapabilityInformation message) and transmitted. That is, an IE (e.g., ChipSetIE) related to chipset information is newly defined as an information element (IE) in the UECapabilityInformation message and transmitted.

[0036] 6 is a signaling diagram showing a first example of a method for notifying capability information. First, the first communication control unit 401 of the BS transmits a UECapabilityEnquiry message to the UE. However, this UECapabilityEnquiry message differs from the conventional method in that it includes an IE requesting chipset information. By including an IE requesting chipset information, it becomes possible to indicate to the UE that the BS that transmitted the message supports acquisition of chipset information.

[0037] The information processing unit 502 of the UE that has received the UECapabilityEnquiry message collects information about the chipset that configures the communication circuit 305 of the UE itself, and generates chipset information. However, the chipset information may be generated in advance and stored in the storage unit 504. For example, the chipset information may be generated when the chipset firmware is updated in the UE.

[0038] Thereafter, the communication control unit 501 of the UE transmits a UECapabilityInformation message in response to the UECapabilityEnquiry message. However, as described above, a ChipSetIE is added to this UECapabilityInformation message. A configuration may be adopted in which multiple IEs corresponding to the chipset information (e.g., a vendor identification IE, a HW identification IE, and a SW identification IE) are added. Note that, as will be described later, there is a limit to the amount of data that can be transmitted as an IE, so it is preferable that the ChipSetIE include only a subset of the chipset information (e.g., only vendor identification information).

[0039] This allows the first communication control unit 401 of the BS to acquire the chipset information of the UE. Furthermore, the BS may notify the CN of the chipset information of the UE via the second communication control unit 402. In this case, for example, the second communication control unit 402 of the BS adds the chipset information to an existing message (e.g., a UERadioCapabilityInfoIndication message) and transmits the message. At this time, similar to the case of the above-mentioned UECapabilityInformation message, it is preferable to newly define an IE (e.g., ChipSetIE) related to the chipset information as an IE in the UERadioCapabilityInfoIndication message and transmit the message.

[0040] <Second Example> In the second embodiment, chipset information is added to an existing message (i.e., a UECapabilityInformation message) and transmitted. However, unlike the first embodiment, chipset information is transmitted by setting a flag in featureGroupIndicator in the UECapabilityInformation message. The featureGroupIndicator is 32 bits long, but the lower 16 bits are unused (Undefined), so this area is allocated to chipset information.

[0041] 7 is a signaling diagram showing a second example of a method for notifying capability information. First, the first communication control unit 401 of the BS transmits a UECapabilityEnquiry message to the UE. This is the same as in the first embodiment, so a detailed description will be omitted.

[0042] The information processing unit 502 of the UE that receives the UECapabilityEnquiry message generates chipset information in the same manner as in the first embodiment.

[0043] Thereafter, the communication control unit 501 of the UE transmits a UECapabilityInformation message in response to the UECapabilityEnquiry message. However, the featureGroupIndicator in this UECapabilityInformation message indicates chipset information. Note that since there is a limit to the amount of data that can be transmitted (for example, 16 bits), it is preferable to include only a subset of the chipset information (for example, only vendor identification information). In this case, for example, the 17th bit (the most significant bit of the lower 16 bits) of the featureGroupIndicator may be set to vendor A, the 18th bit to vendor B, and the 19th bit to vendor C.

[0044] This allows the first communication control unit 401 of the BS to acquire the chipset information of the UE. Furthermore, the BS may notify the CN of the chipset information of the UE via the second communication control unit 402. In this case, for example, the second communication control unit 402 of the BS adds the chipset information to an existing message (for example, a UERadioCapabilityInfoIndication message) and transmits it. At this time, it is preferable to allocate the chipset information to an unused area in the UERadioCapabilityInfoIndication message and transmit it, similar to the case of the above-mentioned UECapabilityInformation message.

[0045] <Third Example> In the third embodiment, a new message for transmitting chipset information (e.g., ChipSetCapability message) is defined to transmit chipset information. Specifically, the UE transmits information indicating whether the new message is supported in an existing message (i.e., UECapabilityInformation message). Then, if the UE supports the transmission of the new message, the BS controls the UE to transmit the new message.

[0046] 8 is a signaling diagram showing a third example of a method for notifying capability information. First, the first communication control unit 401 of the BS transmits a UECapabilityEnquiry message to the UE. However, this UECapabilityEnquiry message differs from the first and second examples in that it includes an IE requesting support information for the ChipSetCapability message. By including this IE, it is possible to indicate to the UE that the BS that transmitted the message supports receiving the ChipSetCapability message.

[0047] The communication control unit 501 of the UE that has received the UECapabilityEnquiry message transmits a UECapabilityInformation message as a response to the UECapabilityEnquiry message. However, this UECapabilityInformation message has information on whether or not the UE can support the ChipSetCapability message (information indicating whether or not the UE can transmit the ChipSetCapability message) added as an IE. Note that the information on whether or not the UE can support the ChipSetCapability message may be indicated by setting a flag in the featureGroupIndicator.

[0048] When the BS receives the UECapabilityInformation message and the UE supports the ChipSetCapability message, the first communication control unit 401 transmits a ChipSetCapabilityEnquiry message to the UE.

[0049] The communication control unit 501 of the UE that has received the ChipSetCapabilityEnquiry message generates chipset information in the same manner as in the first embodiment.

[0050] Thereafter, communication control unit 501 of the UE transmits a ChipSetCapabilityInformation message as a response to the ChipSetCapabilityEnquiry message. The ChipSetCapabilityInformation message includes IEs related to chipset information (for example, a vendor identification IE, a HW identification IE, and a SW identification IE).

[0051] This allows the first communication control unit 401 of the BS to acquire the chipset information of the UE. Furthermore, the BS may notify the CN of the chipset information of the UE via the second communication control unit 402.

[0052] The first and second embodiments described above have the advantage of being easy to implement, since they reuse existing messages and only newly define IEs within the messages. However, since there is a limit to the amount of data that can be transmitted as an IE, it is possible that not all information related to the chipset can be transmitted.

[0053] On the other hand, in the third embodiment, a new message is defined, so implementation may be more difficult than in the first and second embodiments. However, because it is a new message, there are fewer restrictions on the amount of data that can be transmitted, and it may be possible to transmit more diverse chipset information.

[0054] <Effects> As described above, according to the first embodiment, the BS can acquire chipset information of the UE. That is, it becomes possible to know more accurate (more granular) capability information of each UE. Therefore, in the present invention, the first communication control unit 401 of the BS can use the chipset information to perform more detailed mobility control than conventionally.

[0055] For example, in the past, similar mobility control was performed for multiple UEs that sent UECapabilityInformation messages indicating the same content, but in the present invention, by referring to the chipset information of each UE, it is possible to perform different control for each UE.

[0056] That is, in the past, when one of a plurality of chipsets indicating the same UECapabilityInformation message is actually unable to use the first function due to a malfunction or the like, control was performed so as not to cause inconvenience to operation (for example, control based on the greatest common denominator regarding the actual capabilities of each UE). As a result, there were cases where the control was not effective for UEs equipped with chipsets that can use the first function. On the other hand, according to the present invention, by referring to the above-mentioned chipset information, it is possible to perform different mobility control for UEs equipped with chipsets that cannot use the first function and UEs equipped with chipsets that can use the first function, thereby enabling more effective control.

[0057] Furthermore, among the capabilities / functions indicated in the UECapabilityInformation message, there may be vendor-dependent / implementation-dependent functions whose specific operations are not uniquely specified. For example, the measurement of downlink wireless link quality and signal-to-interference-and-noise-power ratio (SINR) may be capabilities that are dependent on the chipset vendor (as vendors may interpret the provisions described in the standard differently, resulting in different specifications such as measurement methods).

[0058] Since differences in specifications such as measurement methods cause errors in output values, controlling the output values ​​of multiple UEs with different chipsets based on the same handling (e.g., calculation formula) may not be appropriate for some UEs. On the other hand, according to the present invention, by referencing the chipset information of each UE, it is possible to control the output values ​​of each UE based on different handling (e.g., calculation formula), thereby enabling more effective control.

[0059] Furthermore, the above-described operation allows the CN to also acquire chipset information of the UE. Therefore, by using the chipset information, the CN can more appropriately perform network control in the non-access stratum (NAS) for the UE than in the past.

[0060] Furthermore, a database (DB) for storing and managing the above-mentioned chipset information of the UE may be arranged in a device within the CN. For example, the database may be configured to manage information that associates the International Mobile Equipment Identity (IMEI) of the UE with the chipset information. This allows, for example, the BS or the CN to obtain the UE's chipset information from the DB based on the UE's IMEI.

[0061] Furthermore, this invention will enable, for example, more efficient communication control, which will contribute to Goal 9 of the United Nations-led Sustainable Development Goals (SDGs), which is to "build resilient infrastructure, promote inclusive and sustainable industrialization, and foster innovation."

[0062] The invention is not limited to the above-described embodiment, and various modifications and variations are possible within the scope of the gist of the invention. [Explanation of symbols]

[0063] 101 base station (BS); 111 user equipment (UE); 121 core network (CN); 401 first communication control unit; 402 second communication control unit; 501 communication control unit; 502 information processing unit

Claims

1. A user equipment (UE) in a wireless communication system, comprising: A receiving means for receiving a request for acquiring capability information of the UE from a base station (BS) to which the UE is connected; a transmitting means for transmitting chipset information relating to a chipset for wireless communication installed in the UE to the BS in response to the acquisition request; and the wireless communication system is a system conforming to a wireless communication standard of the Third Generation Partnership Project (3GPP), the acquisition request is a UECapabilityEnquiry message, The chipset information is transmitted as one or more information elements (IEs) different from a featureGroupIndicator in a UECapabilityInformation message; When the BS receives the same output value related to the downlink wireless channel quality from a plurality of UEs that have transmitted the same featureGroupIndicator but different chipset information, the BS may control the same output value from the plurality of UEs based on different handling based on the respective chipset information. A UE characterized by:

2. The UECapabilityEnquiry message includes an IE for requesting the chipset information.

2. The UE of claim 1 .

3. The chipset information includes information identifying at least one of the vendor of the chipset, the hardware of the chipset, and the software of the chipset.

3. The UE according to claim 1 or 2.

4. The chipset information includes information that identifies the vendor of the chipset, the hardware of the chipset, and the software of the chipset.

3. The UE according to claim 1 or 2.

5. A base station (BS) in a wireless communication system, comprising: a transmitting means for transmitting a request for acquiring capability information of a UE to a UE connected to the BS by wireless communication; a receiving means for receiving, from the UE, chipset information relating to a chipset for wireless communication mounted on the UE together with the capability information; A control means for performing mobility control for the UE based on the capability information and the chipset information; and the wireless communication system is a system conforming to a wireless communication standard of the Third Generation Partnership Project (3GPP), the acquisition request is a UECapabilityEnquiry message, The chipset information is transmitted as one or more information elements (IEs) different from a featureGroupIndicator in a UECapabilityInformation message; When the BS receives the same output value related to the downlink wireless channel quality from a plurality of UEs that have transmitted the same featureGroupIndicator but different chipset information, the BS may control the same output value from the plurality of UEs based on different handling based on the respective chipset information. BS characterized by:

6. and a second transmitting means for transmitting the chipset information to a device in a core network (CN) of the wireless communication system for use in controlling a non-access stratum (NAS) between the CN and the UE.

6. The BS according to claim 5.

7. A method for controlling a user equipment (UE) in a wireless communication system, comprising: a receiving step of receiving a request for acquiring capability information of the UE from a base station (BS) to which the UE is connected; a transmitting step of transmitting chipset information relating to a chipset for wireless communication installed in the UE to the BS in response to the acquisition request; Including, the wireless communication system is a system conforming to a wireless communication standard of the Third Generation Partnership Project (3GPP), the acquisition request is a UECapabilityEnquiry message, The chipset information is transmitted as one or more information elements (IEs) different from a featureGroupIndicator in a UECapabilityInformation message; When the BS receives the same output value related to the downlink wireless channel quality from a plurality of UEs that have transmitted the same featureGroupIndicator but different chipset information, the BS may control the same output value from the plurality of UEs based on different handling based on the respective chipset information. A control method comprising:

8. A method for controlling a base station (BS) in a wireless communication system, comprising: a transmitting step of transmitting a request to acquire capability information of the UE to the UE that is wirelessly connected to the BS; a receiving step of receiving, from the UE, chipset information related to a chipset for wireless communication mounted on the UE together with the capability information; a control step of performing mobility control for the UE based on the capability information and the chipset information; Including, the wireless communication system is a system conforming to a wireless communication standard of the Third Generation Partnership Project (3GPP), the acquisition request is a UECapabilityEnquiry message, The chipset information is transmitted as one or more information elements (IEs) different from a featureGroupIndicator in a UECapabilityInformation message; When the BS receives the same output value related to the downlink wireless channel quality from a plurality of UEs that have transmitted the same featureGroupIndicator but different chipset information, the BS may control the same output value from the plurality of UEs based on different handling based on the respective chipset information. A control method comprising:

9. A program for causing a computer in a user equipment (UE) in a wireless communication system to execute the control method according to claim 7.

10. A program for causing a computer in a base station (BS) in a wireless communication system to execute the control method according to claim 8.

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