WO2023053449A1

WO2023053449A1 - Terminal device, base station device, and wireless communication method

Info

Publication number: WO2023053449A1
Application number: PCT/JP2021/036443
Authority: WO
Inventors: 賢一木原
Original assignee: ソフトバンク株式会社
Priority date: 2021-10-01
Filing date: 2021-10-01
Publication date: 2023-04-06

Abstract

Provided are a terminal device, a base station device, and a wireless communication method with which wireless communication more suitable for a terminal device can be performed.　This terminal device (10) performs wireless communication with a base station device, the terminal device (10) comprising: a receiving unit (11) that uses a prescribed frequency band to receive a query from the base station device at the time of a connected state with the base station device; an information setting unit (12) that, on the basis of the query, sets terminal characteristic information that indicates inherent characteristics of the terminal device and characteristics other than a function related to wireless communication; and a transmitting unit (13) that transmits the terminal characteristic information to the base station device.

Description

TERMINAL DEVICE, BASE STATION DEVICE, AND WIRELESS COMMUNICATION METHOD

The present invention relates to terminal devices, base station devices, and wireless communication methods.

　The 3GPP (Third Generation Partnership Project), an international standardization organization, is studying NR (New Radio), a new radio access technology for the 5th generation (5G: Fifth Generation) cellular communication system. NR is being studied as a technology for realizing a wider variety of services than LTE (Long Term Evolution)-Advanced, which is the fourth generation cellular communication system. For example, NR has eMBB (enhanced Mobile Broad Band) that realizes high-speed and large-capacity communication, URLLC (Ultra-Reliable and Low Latency Communication) that realizes ultra-reliable and low-latency communication, and IoT (Internet of Things) devices. Usage scenarios for different purposes, such as mMTC (massive machine type communication) that realizes multiple simultaneous connections, are defined as implementation requirements.

Conventionally, in LTE and NR, a terminal device in a connected state (RRC Connected) notifies the connecting base station device of capability information indicating the functions it supports in wireless communication with the base station device. (See Non-Patent Documents 1 and 2).

However, when the base station apparatus determines the function to be executed by the terminal apparatus for wireless communication based on the reported capability information, elements other than the terminal apparatus support function, such as the terminal apparatus type, application, purpose, The installation environment and the like are not considered. Therefore, it may not always be said that the functions related to wireless communication that are determined and executed according to the support functions of the terminal device are suitable for the terminal device that has notified the capability information.

The present invention has been made in view of such circumstances, and one of its objects is to provide a terminal device, a base station device, and a wireless communication method capable of performing wireless communication more suitable for the terminal device.

A terminal device according to one aspect of the present invention is a terminal device that performs wireless communication with a base station device, and when the terminal device is in a connected state with the base station device using a predetermined frequency band, a receiving unit for receiving an inquiry; an information setting unit for setting terminal characteristic information indicating a characteristic of the terminal other than a function related to wireless communication based on the inquiry; and transmitting the terminal characteristic information to the base station apparatus. and a transmitter.

A base station apparatus according to one aspect of the present invention is a base station apparatus that performs wireless communication with a terminal apparatus, and when in a connected state with the terminal apparatus using a predetermined frequency band, the type of the terminal apparatus a receiving unit that receives terminal type information indicating from the terminal device, a function determination unit that determines a function related to wireless communication and to be executed by the terminal device based on the terminal type information, and a setting related to the determined function and a transmitting unit configured to transmit the function setting information to the terminal device.

A wireless communication method according to one aspect of the present invention is a wireless communication method used in a terminal device that performs wireless communication with a base station device, wherein a predetermined frequency band is used to establish a connection with the base station device. At a certain time, a step of receiving an inquiry from a base station apparatus, a step of setting terminal characteristic information indicating a characteristic of a terminal apparatus other than a function related to wireless communication based on the inquiry, and a step of setting the terminal characteristic information and transmitting to the base station device.

According to the present invention, wireless communication more suitable for terminal devices can be performed.

FIG. 1 is a configuration diagram showing an example of a schematic configuration of a wireless communication system according to one embodiment. FIG. 2 is a configuration diagram showing an example of a hardware configuration of a terminal device and a base station device according to one embodiment. FIG. 3 is a configuration diagram showing an example of a functional block configuration of a terminal device according to one embodiment. FIG. 4 is a configuration diagram showing an example of a functional block configuration of a base station apparatus according to one embodiment. FIG. 5 is a time chart for explaining an example of a processing procedure performed by the wireless communication system according to one embodiment. FIG. 6 is a flowchart for explaining an example of a processing procedure performed by a terminal device according to one embodiment. FIG. 7 is a flowchart for explaining an example of a processing procedure performed by the base station apparatus according to one embodiment.

The embodiment of the present invention will be described below. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, the drawings are schematic. Therefore, specific dimensions and the like should be determined by referring to the following description. In addition, it goes without saying that there are portions with different dimensional relationships and ratios between the drawings. Furthermore, the technical scope of the present invention should not be construed as being limited to this embodiment.

First, a schematic configuration of a wireless communication system according to one embodiment will be described with reference to FIG. FIG. 1 is a configuration diagram showing an example of a schematic configuration of a radio communication system 100 according to the first embodiment.

As shown in FIG. 1, the wireless communication system 100 includes terminal devices 10-1 to 10-m, base station devices 50-1 to 50-n, and a core network device 90. Configured.

The radio communication system 100 is, for example, a radio communication system for NR. Note that the present invention is applicable to any wireless communication system that includes at least a terminal device and a base station device, and is not limited to NR. For example, the present invention is applicable to LTE and LTE-Advanced. It is also applicable to a radio communication system using NR as part of the radio communication system. Hereinafter, LTE and LTE-Advanced are also referred to as E-UTRA (Evolved Universal Terrestrial Radio Access), but they have the same meaning. An area (coverage area) formed by a base station apparatus is called a cell, and E-UTRA and NR are cellular communication systems constructed by multiple cells. Either TDD (Time Division Duplex) or FDD (Frequency Division Duplex) may be applied to the radio communication system according to the present embodiment, and a different system may be applied for each cell.

The terminal devices 10-1 to 10-m are wirelessly connected to one of the base station devices 50-1 to 50-n, respectively. Moreover, each of the terminal devices 10-1 to 10-m may be wirelessly connected to two or more of the base station devices 50-1 to 50-n simultaneously. Each of the base station devices 50-1 to 50-n can use E-UTRA or NR. For example, the base station device 50-1 may use NR and the base station device 50-n may use E-UTRA, or vice versa. A base station device in E-UTRA is called an eNB (evolved NodeB), and a base station device in NR is called a gNB (g-NodeB). Henceforth, when describing as a base station apparatus, it is a meaning including both eNB and gNB. A terminal device in E-UTRA and NR is called UE (User Equipment). The base station apparatus gNB in NR may connect with the terminal apparatus using a part of the bandwidth of the frequency band it uses (BWP: BandWidth part). In the following description, the term "cell" includes BWP.

Note that FIG. 1 illustrates terminal devices 10-1 to 10-m as m (m is an integer equal to or greater than 2) terminal devices. In the following description, when these m terminal devices are described without distinction, part of the reference numerals will be omitted and they will simply be referred to as "terminal devices 10". Also, in FIG. 1, base station devices 50-1 to 50-n are illustrated as n base station devices (n is an integer equal to or greater than 2). In the following description, when these n base station devices are not distinguished, they are simply referred to as "base station device 50" with some reference numerals omitted.

For example, the terminal device 10 may be connected to the base station device 50 on a cell-by-cell basis, and may be connected using a plurality of cells, for example, carrier aggregation. When the terminal device 10 is connected via a plurality of base station devices, that is, in the case of dual connectivity, the initially connected base station device is a master node (MN: Master Node), and the additionally connected base station device is It is called a secondary node (SN: Secondary Node). The base station devices are connected by a base station interface. Also, the base station device 50 and the core network device 90 are connected by a core interface. The base station interface is used, for example, to exchange control signals necessary for handover and cooperative operation between base station apparatuses.

The core network device 90, for example, has the base station device 50 under its control, and mainly handles load control between base station devices, calling (paging) of the terminal device 10, and movement control such as location registration. In NR, in the core network device 90, as a function group of the control plane (C-plane), AMF (Access and Mobility Management Function) that manages mobility and SMF (Session Management Function) that manages sessions are defined. . E-UTRA defines an MME (Mobility Management Entity) corresponding to AMF.

Although FIG. 1 shows an example in which the core network device 90 is composed of one device, it is not limited to this. For example, the core network device may be composed of multiple devices including servers, gateways, and the like.

The terminal device 10 and the base station device 50 transmit and receive RRC messages in the radio resource control (RRC) layer to proceed with session processing (also referred to as a connection sequence). As the session process progresses, the terminal device 10 changes from the idle state (RRC Idle) to the connected state (RRC Connected) to the base station device 50 . The idle state corresponds to the standby state of the terminal device 10 .

In addition, the terminal device 10 and the base station device 50 transmit and receive a MAC control element (MAC CE: MAC Control Element) in the medium access control (MAC) layer. The RRC message is transmitted as an RRC PDU (Protocol Data Unit), and the mapped logical channels are common control channel (CCCH: Common Control Channel), dedicated control channel (DCCH: Dedicated Control Channel), paging control channel (PCCH: Paging Control Channel), Broadcast Control Channel (BCCH), or Multicast Control Channel (MCCH) is used. MAC CE is transmitted as MAC PDU (or MAC sub PDU). A MAC sub PDU is equal to a Service Data Unit (SDU) in the MAC layer plus, for example, an 8-bit header, and a MAC PDU contains one or more MAC sub PDUs.

Physical channels and physical signals related to this embodiment will be explained. Among the physical channels involved in the embodiment of the present invention, a physical broadcast channel (PBCH: Physical Broadcast Channel), a primary synchronization signal (PSS: Primary Synchronization Signal), a secondary synchronization signal (SSS: Secondary Synchronization Signal), a physical random access channel ( Physical Random Access Channel (PRACH) and Physical Downlink Control Channel (PDCCH) are described below. In addition, in the radio communication system according to the embodiment, in addition to physical uplink control channel (PUCCH: Physical Uplink Control Channel), physical downlink shared channel (PDSCH: Physical Downlink Shared Channel), physical uplink shared channel (PUSCH: Physical Uplink Shared Channel), Sounding Reference Signal (SRS), and Demodulation Reference Signal (DMRS) exist, but detailed explanations are omitted.

<Physical broadcast channel (PBCH)>
A physical broadcast channel (PBCH) is transmitted from a base station apparatus to a terminal apparatus and used to notify common parameters (system information) in cells under the control of the base station apparatus. The system information is further classified into a master information block (MIB: Master Information Block) and a system information block (SIB: System Information Block). The system information block is further subdivided into SIB1, SIB2, . . . and transmitted. The system information contains information necessary for connecting to a cell. For example, the MIB contains a system frame number and information indicating whether camping on a cell is possible or not. In addition, SIB1 includes parameters for calculating cell quality (cell selection parameters), channel information common to cells (random access control information, PUCCH control information, PUSCH control information), scheduling information of other system information, and the like. include. In addition, the physical broadcast channel (PBCH) is set with a synchronization signal consisting of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) as a synchronization signal block (SSB: Synchronization Signal Block (or SS/PBSH)). is sent periodically. By receiving the synchronization signal block (SSB), the terminal device 10 can acquire cell identifier (cell ID) information and reception timing, as well as measure the signal quality of the cell.

System information notified by physical broadcast channel (PBCH) etc. is also called "system broadcast information" or "broadcast information". Also, camping on a cell means that the terminal device has completed cell selection and/or cell reselection, and the terminal device has selected a cell for monitoring system broadcast information and paging information. It means to become The terminal device establishes the above-described RRC connection with the base station device that forms the camped-on cell.

<Primary sync signal (PSS)>
The primary synchronization signal (PSS) is used by the terminal equipment to synchronize with the reception symbol timing and frequency of the downlink signal of the base station equipment. A primary synchronization signal (PSS) is a signal that a terminal apparatus tries to detect first in a procedure for detecting a cell of a base station apparatus (hereinafter also referred to as a "cell search procedure"). As for the primary synchronization signal (PSS), three signals "0" to "2" are repeatedly used based on the physical cell ID. The physical cell ID is a physical cell identifier, and 504 IDs are used in E-UTRA, and 1008 IDs are used in NR.

<Secondary sync signal (SSS)>
A secondary synchronization signal (SSS) is used by the terminal device to detect the physical ID of the base station device. Specifically, the secondary synchronization signal (SSS) is a signal for the terminal device to detect the physical cell ID in the cell search procedure. Based on the physical cell ID, the secondary synchronization signal (SSS) is repeatedly used in 168 ways from "0" to "167" in E-UTRA, and in 336 ways from "0" to "335" in NR. .

<Physical random access channel (PRACH)>
A physical random access channel (PRACH) is used by the terminal device 10 to transmit a random access preamble to the base station device 50 . A physical random access channel (PRACH) is generally used in a state where uplink synchronization has not been established between the terminal device 10 and the base station device 50, and transmission timing adjustment information (timing advance) and uplink radio Used for resource requests. Information indicating radio resources capable of transmitting random access preambles is transmitted to terminals using broadcast information and RRC messages.

<Physical Downlink Control Channel (PDCCH)>
A physical downlink control channel (PDCCH) is transmitted from the base station apparatus 50 to notify the terminal apparatus 10 of downlink control information (DCI). The downlink control information includes uplink radio resource information (uplink grant (UL grant)) usable by the terminal device 10 or downlink radio resource information (downlink grant (DL grant)). A downlink grant is information indicating scheduling of a physical downlink shared data channel (PDSCH). An uplink grant is information indicating scheduling of a physical uplink shared channel (PUSCH). If the physical downlink control channel (PDCCH) is transmitted as a response to the random access preamble, the physical downlink shared data channel (PDSCH) indicated by the physical downlink control channel (PDCCH) is the random access response and the random access preamble index information, transmission timing adjustment information, uplink grant, and the like.

<Hardware configuration>
Next, hardware configurations of the terminal apparatus and the base station apparatus according to one embodiment will be described with reference to FIG. FIG. 2 is a configuration diagram showing an example of the hardware configuration of the terminal device 10 and the base station device 50 in one embodiment.

As shown in FIG. 2, the terminal device 10 and the base station device 50 each include a processor 21, a memory 22, a storage device 23, a communication device 24, an input device 25, an output device 26, and an antenna 27, respectively.

The processor 21 is configured to control the operation of each unit of the terminal device 10 or the base station device 50. The processor 21 is, for example, a CPU (Central Processing Unit), DSP (Digital Signal Processor), ASIC (Application Specific Integrated Circuit), PLD (Programmable Logic Device), FPGA (Field Programmable Gate Array), SoC (System-on-a -chip) and other integrated circuits.

The memory 22 and the storage device 23 are configured to store programs, data, etc., respectively. The memory 22 includes, for example, ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), and/or RAM (Random Access Memory). The storage device 23 is, for example, a storage such as a HDD (Hard Disk Drive), SSD (Solid State Drive) and/or eMMC (embedded Multi Media Card).

The communication device 24 is configured to communicate via wired and/or wireless networks. The communication device 24 includes, for example, a network card, a communication module, and the like. Further, the communication device 24 may include an amplifier, an RF (Radio Frequency) device that performs processing related to radio signals, and a BB (BaseBand) device that performs baseband signal processing.

For example, the RF device performs D/A (Digital to Analog) conversion, modulation, frequency conversion, power amplification, etc. on the digital baseband signal received from the BB device, thereby converting the radio signal to be transmitted from the antenna 27. Generate. Also, the RF device generates a digital baseband signal by performing frequency conversion, demodulation, A/D (Analog to Digital) conversion, etc. on the radio signal received from the antenna 27, and transmits the digital baseband signal to the BB device. The BB device performs processing for converting a digital baseband signal into an IP packet and processing for converting an IP packet into a digital baseband signal.

The input device 25 is configured so that information can be input by a user's operation. The input device 25 includes, for example, a keyboard, touch panel, mouse, and/or microphone.

The output device 26 is configured to output information. The output device 26 includes, for example, a display device such as a liquid crystal display, an EL (Electro Luminescence) display, a plasma display, and/or a speaker.

The antenna 27 is configured to be able to radiate (radiate) and receive radio waves (electromagnetic waves) in one or more predetermined frequency bands. Antenna 27 may be non-directional, ie omnidirectional. An omnidirectional antenna 27 has approximately the same gain from all 360 degrees in the horizontal plane, the vertical plane, or both in the horizontal and vertical planes.

Note that the number of antennas 27 is not limited to one. When the base station apparatus 50 has a plurality of antennas, for example, they may be divided into transmitting antennas and receiving antennas. Further, when the plurality of antennas are divided into a transmitting antenna and a receiving antenna, at least one of them may include a plurality of antennas. When the base station apparatus 50 is equipped with a plurality of transmitting/receiving antennas or transmitting antennas, it is possible to use beamforming technology, which will be described later.

In addition, the terminal device 10 and the base station device 50, although not shown, include various sensors such as a GPS (Global Positioning System) receiver, direction sensor, gravity sensor, temperature sensor, acceleration sensor, fingerprint, retina, At least one of various biometric authentication functions such as iris, face, and voiceprint, various devices such as cameras, microphones, speakers, and lights, input/output interfaces including connection terminals, and the like may be further provided.

<Functional block configuration>
(Terminal device)
Next, the functional block configuration of the terminal device according to one embodiment will be described with reference to FIG. FIG. 3 is a configuration diagram showing an example of the functional block configuration of the terminal device 10 according to one embodiment. It should be noted that FIG. 3 is for showing the functional blocks required in the present embodiment, and does not exclude the terminal device 10 from having functional blocks other than those shown.

As shown in FIG. 4, the terminal device 10 includes a receiving unit 11, an information setting unit 12, and a transmitting unit 13 as functional blocks.

The receiving unit 11 is configured to receive an inquiry from the base station device 50 when it is in a connected state with the base station device 50 using a predetermined frequency band.

More specifically, the receiving unit 11 is configured to receive a capability information inquiry from the base station device 50 when in a connected state with the base station device 50 using a predetermined frequency band. there is

Specifically, the base station device 50 forms a cell having a coverage area with a radius of several hundred meters to ten and several kilometers, for example. The base station apparatus 50 performs wireless communication with the terminal apparatus 10 existing (also referred to as "in-range") within the cell it forms, and attempts to provide mobile communication services to the terminal apparatus.

The terminal device 10 selects a cell for wireless communication with the base station device 50 . In this specification, selection of a cell and selection of a cell mean at least one of cell selection and cell reselection described above. When cell selection is completed and the terminal device 10 selects a cell for monitoring system broadcast information and paging information, the terminal device 10 camps on the cell. Therefore, the terminal device 10 can establish an RRC connection with the base station device 50 that forms the camped-on cell. When the RRC connection is completed, the terminal device 10 is in a connected state (RRC Connected) to the base station device 50 forming the camped-on cell, and is capable of transmitting and receiving data, that is, uplink and downlink communication of data. becomes. Here, when a predetermined frequency band is assigned to the cell of the base station device 50, the terminal device 10 is in a connected state (RRC Connected) with the base station device 50 using the predetermined frequency band. I can say.

The predetermined frequency band is, for example, the frequency range used in NR. The frequency range used in NR is classified into two, FR1 (Frequency Range 1) and FR2 (Frequency Range 2). FR2 is a frequency range from around 30 GHz to about 100 GHz, and 3GPP defines a frequency range from 24250 MHz to 52600 MHz. In wireless communication using FR2, it is necessary to consider antenna placement, housing structure, etc., and requirements are defined in a format corresponding to the power class of the terminal device 10 and the terminal type. 3GPP defines the frequency range of FR1 from 410 MHz to 7125 MHz. In wireless communication using FR1, unlike FR2, requirements for corresponding power classes of terminal devices 10 and terminal types are not defined. Therefore, the predetermined frequency band is preferably included in the FR1 frequency range, that is, the frequency range of 410 MHz to 7125 MHz. As a result, in wireless communication using FR1, it becomes possible to notify the terminal characteristic information indicating its own characteristic, which will be described later.

A capability information inquiry is a request for the terminal device 10 to notify (reply) its own capability information. The inquiry from the base station apparatus 50 is made by transmitting a capability information inquiry (UECapabilityInquiry) message to the terminal apparatus 10 .

The capability information is information indicating functions that the terminal device 10 itself supports or supports among various functions defined for wireless communication. A function that the terminal device 10 itself supports or supports is, in other words, a function that the terminal device 10 can execute.

In the capability information, parameter information is set that indicates that the function is implemented in the terminal device 10 and that the requirements specified for the function are satisfied.

Specifically, the capability information in LTE includes parameter information such as a list of LTE terminal equipment categories, LTE support bands, or combinations of LTE and LTE support bands. In addition, the capability information in NR includes a terminal device category of NR, a supported physical parameter set, a list of support bands of NR and a combination of support bands of LTE and NR, and whether to support functions for standalone communication. It contains information such as a parameter indicating whether DC (Dual Connectivity) is supported or not.

The information setting unit 12 is configured to set, based on the received inquiry, terminal characteristic information indicating characteristics of itself and characteristics other than functions related to wireless communication.

More specifically, the information setting unit 12 is configured to set terminal characteristic information and capability information indicating the functions that the terminal itself supports in wireless communication based on an inquiry about capability information.

Here, the terminal device 10 that wirelessly communicates with the base station device 50 may include a wide variety of devices. In one example, a customer premises equipment (CPE: Customer Premises Equipment) corresponds to the terminal device 10 . Customer premises equipment is equipment that is generally installed at the demarcation point of responsibility with telecommunications carriers. Private Branch Exchange), etc. In another example, an access point (AP) corresponds to the terminal device 10 . An access point is generally a wireless device that connects wireless LAN (Local Area Network) clients to each other or connects wireless LAN (Local Area Network) clients to other networks.

When these devices are the terminal device 10, wireless communication with the base station device 50 is performed using fixed wireless access (FWA). At this time, the terminal device 10 has characteristics different from mobile communication devices such as smart phones, mobile phones, and tablet devices. This feature is, for example, that the terminal device 10 is fixedly installed, does not move from a fixed area such as a customer's premises, and does not require portability, so there are no restrictions on dimensions (size) without requiring microminiature parts. There are few, and it is not used in the vicinity of the human body. Therefore, when the terminal device 10 is a characteristic device having the characteristics described above, the information setting unit 12 sets terminal characteristic information indicating the characteristics. Specifically, the parameter information representing the characteristics of the self is stored in advance in a storage means such as the memory 22 or the storage device 23 shown in FIG. Based on the inquiry about the capability information, the unit 12 reads the parameter information stored in the memory 22 or the storage device 23 and sets it as the terminal characteristic information.

The terminal feature information is not limited to information indicating one feature of the terminal device 10, and may include information indicating a plurality of features. Specifically, the terminal characteristic information includes at least one of mobility information about mobility, channel variation information about channel variation, size information about dimensions, and usage mode information about usage mode.

The mobility information is, for example, parameter information indicating whether the terminal device 10 does not move (is fixed) or whether the range of movement of the terminal device 10 is limited. When the terminal device 10 does not move or the movement range of the terminal device 10 is limited, the functions and conditions associated with the movement of the terminal device 10 such as handover are not required or are relaxed. The channel fluctuation information is parameter information indicating whether or not the channel fluctuates little because, for example, the terminal device 10 does not move or the range of movement of the terminal device 10 is limited. When there is little channel fluctuation, measurement of communication quality such as RSRP (Reference Signal Received Power), RSSI (Received Signal Strength Indication), RSRQ (Reference Signal Received Quality), SINR (Signal to Interference Noise Ratio), and base station equipment Conditions for notification to 50 are relaxed. The size information is, for example, parameter information indicating whether the terminal device 10 has no or few size restrictions, such as requiring ultra-small parts. If the terminal device 10 has no or few size restrictions, the factors that limit the wireless performance are reduced, so it is possible to tighten conditions such as unwanted radiation. Usage mode information is, for example, parameter information indicating whether or not the device is used near a human body. When the terminal device 10 is not used in the vicinity of the human body, such as when it is not held in hand, the conditions for protecting the human body are relaxed or changed.

The information setting unit 12 is also configured to set terminal type information indicating its own type based on the received inquiry.

As described above, the characteristics of the terminal device 10 tend to depend on the type of terminal device, such as whether it is a customer premises equipment device or an access point wireless device. Therefore, the characteristics of the terminal device 10 can be associated with its own type. Note that the information setting unit 12 sets terminal type information indicating its own type based on the inquiry instead of the terminal characteristic information or together with the terminal characteristic information.

The transmission unit 13 is configured to transmit the set terminal characteristic information to the base station device 50 . In this way, by transmitting the terminal characteristic information indicating the terminal characteristics other than the function related to wireless communication to the base station apparatus 50, when determining the function to be executed by the terminal apparatus 10 related to wireless communication, It is possible to reflect the features of the terminal device 10 . Therefore, the function to be executed by the terminal device 10 regarding wireless communication can be determined according to the features of the terminal device 10 other than the function related to wireless communication, and wireless communication more suitable for the terminal device 10 can be performed. can be done.

In addition, the terminal characteristic information includes at least one of mobility information regarding mobility, channel variation information regarding channel variation, size information regarding dimensions, and usage mode information regarding usage mode, so that, for example, handover Wireless communication with the base station apparatus 50 can be made more suitable by omitting procedures, reducing communication quality measurement and notification, relaxing requirements for unnecessary radiation, changing conditions for protecting the human body, and the like. Therefore, it is possible to contribute to reduction of signaling, reduction of power consumption, and the like.

More specifically, the transmission unit 13 transmits the terminal feature information to the base station device 50 by including the terminal characteristic information in the capability information. Specifically, the transmission unit 13 includes the set terminal characteristic information in a capability information (UECapabilityInformation) message and transmits the message to the base station apparatus 50 with which the RRC connection has been established.

In this way, by including the terminal feature information in the capability information and transmitting it to the base station apparatus 50, the features of the terminal apparatus 10 and the wireless communication functions supported by the terminal apparatus 10 can be easily transferred to the base station apparatus 50. can be notified.

It should be noted that the terminal feature information is not limited to being included in the capability information and transmitted. For example, the transmission unit 13 may transmit the terminal characteristic information and capability information to the base station device 50, respectively. Moreover, when the terminal characteristic information includes information indicating a plurality of characteristics, the transmitting unit 13 may divide the terminal characteristic information for each characteristic and transmit the information.

Also, the transmission unit 13 is configured to transmit the terminal type information to the base station device 50 when the terminal type information is set. In this case, the transmission unit 13 may include the terminal type information in the capability information and transmit it to the base station apparatus 50 instead of the terminal characteristic information or together with the terminal characteristic information. Note that the transmission unit 13 may transmit both of the terminal characteristic information and the terminal type information to the base station device 50 or may transmit either one to the base station device 50 .

By transmitting the terminal type information to the base station apparatus 50 in this way, it is possible to determine the function to be executed by the terminal apparatus 10 regarding wireless communication according to the type of the terminal apparatus 10 .

Note that the receiving unit 11 and the transmitting unit 13 may be implemented by, for example, the antenna 27 and the communication device 24, or may be implemented by the processor 21 in addition to the communication device 24 executing a program stored in the storage device 23. may The information setting unit 12 may be implemented by the processor 21 executing a program stored in the storage device 23 . When executing a program, the program may be stored in a storage medium. The storage medium storing the program may be a non-transitory computer readable medium. The non-temporary storage medium is not particularly limited, but may be, for example, a USB (Universal Serial Bus) memory or a CD-ROM (Compact Disc ROM).

(Base station equipment)
Next, the functional block configuration of the base station apparatus according to one embodiment will be described with reference to FIG. FIG. 4 is a configuration diagram showing an example of the functional block configuration of the base station apparatus 50 in one embodiment. Note that FIG. 4 is intended to show the functional blocks required in this embodiment, and does not exclude that the base station apparatus 50 has functional blocks other than those shown.

As shown in FIG. 4, the base station device 50 includes a transmitting section 51, a receiving section 52, and a function determining section 53 as functional blocks.

The transmission unit 51 is configured to transmit an inquiry to the terminal device 10 when it is in a connected state with the terminal device 10 using a predetermined frequency band.

More specifically, the transmission unit 51 is configured to transmit a capability information inquiry to the terminal device 10 when it is in a connected state with the terminal device 10 using a predetermined frequency band.

Specifically, as described above, a predetermined frequency band is assigned to the cell of the base station device 50, and when the terminal device 10 camps on the cell and completes the RRC connection, the base station device 50 A connection state (RRC Connected) is established with the terminal device 10 using a predetermined frequency band. During this state, the transmitting unit 51 transmits a capability information inquiry (UECapabilityInquiry) message to the terminal device 10 in the connected state (RRC Connected).

The receiving unit 52 is configured to receive the aforementioned terminal type information from the terminal device 10 when it is in a connected state with the terminal device 10 using a predetermined frequency band. Further, the receiving unit 52 is configured to receive the above-described terminal characteristic information from the terminal device 10 together with the terminal type information.

The function determination unit 53 is configured to determine a function related to wireless communication to be executed by the terminal device 10 based on the received terminal type information. Further, the function determination unit 53 is configured to determine a function related to wireless communication and to be executed by the terminal device 10 based on the received terminal characteristic information.

Here, as described above, the type of the terminal device 10 indicated by the terminal type information is a feature of the terminal device, and can be associated with features other than functions related to wireless communication. Therefore, for example, correspondence information in which the type of the terminal device 10 is associated with the feature is stored in advance in a storage means such as the memory 22 or the storage device 23 shown in FIG. Then, the function determining unit 53 reads out the correspondence information stored in the memory 22 or the storage device 23, and based on the correspondence information, specifies the parameter information representing the characteristics of the terminal device 10 from the type indicated by the terminal type information. do. Then, the function determination unit 53 determines the function to be executed by the terminal device 10 based on the specified parameter information. As a result, the characteristics of the terminal device 10 are reflected when determining the functions to be executed by the terminal device 10 regarding wireless communication.

The type and characteristics of the terminal device 10 may be further associated with functions to be executed by the terminal device 10. Also, the correspondence in the correspondence information may be in any format, such as a tabular format, a table format, or a DB format. Furthermore, the correspondence information is not limited to being stored in the base station device 50 itself. Information may be used to inquire, and parameter information representing the characteristics of the terminal device 10 corresponding to the terminal type information may be acquired.

The transmission unit 51 is configured to transmit function setting information indicating settings related to the determined function to the terminal device 10 in the connected state using a predetermined frequency band.

In this way, based on the terminal type information, by determining the function related to wireless communication to be executed by the terminal device 10, the type of the terminal device 10 indicated by the terminal type information is executed by the terminal device 10 related to wireless communication. can be reflected in the functions that Further, by transmitting function setting information indicating settings related to the determined functions to the terminal device 10, functions to be executed by the terminal device 10 regarding wireless communication and settings thereof can be changed according to the type of the terminal device 10. can.

Specifically, the transmitting unit 51 transmits a function setting information (RRC Reconfiguration) message indicating settings related to functions to the terminal device 10 in the connected state (RRC Connected). The terminal device 10 that has received the function setting information (RRCReconfiguration) message changes the functions to be executed and their settings based on the function setting information (RRCReconfiguration) message.

The transmitting unit 51 and the receiving unit 52 may be realized by the communication device 24, for example, or may be realized by the processor 21 executing a program stored in the storage device 23 in addition to the communication device 24. . Function determining unit 53 may be implemented by processor 21 executing a program stored in storage device 23 . When executing a program, the program may be stored in a storage medium. The storage medium storing the program may be a computer-readable non-temporary storage medium. The non-temporary storage medium is not particularly limited, but may be, for example, a storage medium such as a USB memory or a CD-ROM.

<Processing procedure>
Next, a processing procedure performed by the wireless communication system according to one embodiment will be described with reference to FIG. FIG. 5 is a time chart for explaining an example of a processing procedure performed by the wireless communication system 100 according to one embodiment. 5, for simplification of explanation, among the processing procedures in the radio communication system 100 shown in FIG. The illustration and description of the processing procedure with the core network device 90 are omitted. Moreover, in FIG. 5, the terminal device 10 is also written as "UE", and the base station device 50 is also written as "gNB".

As shown in FIG. 5, in the base station device 50, the transmission unit 51 transmits broadcast information to the terminal device 10 via a physical broadcast channel (PBCH) or the like (S101). This broadcast information includes at least one of a master information block (MIB) and a system information block (SIB). Before step S101, the base station apparatus 50 periodically transmits a synchronizing signal to peripheral terminal apparatuses, and the terminal apparatuses 10 to which the notification information is transmitted are synchronized in advance by this synchronizing signal. and has received reference information from the base station apparatus 50 .

In the terminal device 10, the receiving unit 11 receives the broadcast information transmitted in step S101, and the terminal device 10 performs cell selection or cell reselection based on information included in the broadcast information. and camps on the cell formed by the base station device 50 (S102). When the camp-on is completed, the terminal device 10 selects the cell of the base station device 50 as the cell for monitoring system broadcast information and paging information.

After that, when, for example, uplink data (Mobile Originated Data) is generated in the terminal device 10, the terminal device 10 performs random access including establishment of an RRC connection with the base station device 50 (S103). When the RRC connection is established between the terminal device 10 and the base station device 50 as a result of the random access in step S103, the terminal device 10 changes from the idle state (RRC Idle) to the connected state (RRC Connected).

In the base station device 50, when the RRC connection with the terminal device 10 is completed, the transmission unit 51 transmits a capability information inquiry (UECapabilityInquiry) message to the terminal device 10 (S104).

In the terminal device 10, the receiving unit 11 receives the capability information inquiry (UECapabilityInquiry) message transmitted in step S104, and the information setting unit 12 determines that the message is connected using a predetermined frequency band (RRC Connected). determines whether or not the message is from the base station apparatus 50 located in , and sets terminal characteristic information and terminal type information based on the received capability information inquiry (UECapabilityEnquiry) message (S105).

Next, the transmission unit 13 generates a capability information (UECapabilityInformation) message of the terminal device 10 itself in response to a request included in the capability information inquiry (UECapabilityInquiry) message, and generates the terminal feature information and the terminal type set in step S105. The information is included in a capability information (UECapabilityInformation) message and transmitted to the base station apparatus 50, which is the base station apparatus that transmitted the capability information inquiry (UECapabilityInquiry) message (S106).

In the base station device 50, the receiving unit 52 receives the capability information (UECapabilityInformation) message transmitted in step S106, and the function determining unit 53 determines terminal feature information and terminal type information included in the capability information (UECapabilityInformation) message. Based on at least one of them, the function to be executed by the terminal device 10 is determined (S107). The functions determined in step S<b>107 are functions related to wireless communication between the base station device 50 and the terminal device 10 .

Next, the transmitting unit 51 transmits a function setting information (RRCReconfiguration) message indicating settings related to the functions determined in step S106 to the terminal device 10, which is the terminal device that transmitted the capability information (UECapabilityInformation) message (S108). The terminal device 10 changes the functions to be executed and their settings based on the received function configuration information (RRCReconfiguration) message. Accordingly, in wireless communication with the base station apparatus 50, the functions to be executed by the terminal device 10 and its settings can be changed according to the features of the terminal device 10 indicated by the terminal feature information.

Next, a processing procedure performed by the terminal device and the base station device according to one embodiment will be described with reference to FIGS. 6 and 7. FIG. FIG. 6 is a flowchart for explaining an example of a processing procedure performed by the terminal device 10 according to one embodiment. FIG. 7 is a flowchart for explaining an example of a processing procedure performed by the base station device 50 in one embodiment.

In the following description, it is assumed that an RRC connection has been completed between the terminal device 10 and the base station device 50 in advance, and that they are in a connected state (RRC Connected) using a predetermined frequency band. In addition, the terminal device sets and transmits terminal feature information out of the terminal feature information and the terminal type information, and the base station device sets and transmits terminal device 10 based on the terminal type information out of the terminal feature information and the terminal type information. An example of determining the function to be executed will be described.

(Processing procedure of terminal device)
As shown in FIG. 6, the receiving unit 11 receives a capability information inquiry (UECapabilityInquiry) message from the base station apparatus 50 (S201).

Next, the information setting unit 12 sets terminal characteristic information based on the capability information inquiry (UECapabilityInquiry) message received in step S201 (S202).

Next, the transmission unit 13 includes the terminal characteristic information set in step S202 in a capability information (UECapabilityInformation) message, and transmits a capability information inquiry (UECapabilityInquiry) message to the base station apparatus 50, which is the transmission source (S203). ).

After that, the receiving unit 11 receives the function configuration information (RRCReconfiguration) message from the base station device 50 (S204). As a result, regarding wireless communication with the base station device 50, the functions to be executed by the terminal device 10 and their settings are changed.

(Processing procedure of base station device)
As shown in FIG. 7, the transmission unit 51 transmits a capability information inquiry (UECapabilityEnquiry) message to the terminal device 10 (S251).

After that, the receiving unit 52 receives a capability information (UECapabilityInformation) message including at least terminal type information from the terminal device 10 that is the transmission destination of the capability information inquiry (UECapabilityInquiry) message (S252).

Next, the function determination unit 53 performs a function related to wireless communication between the base station apparatus 50 and the terminal apparatus 10 based on the terminal type information included in the capability information (UECapabilityInformation) message. A function to be executed is determined (S253).

Next, the transmission unit 51 transmits a function setting information (RRCReconfiguration) message indicating settings related to the function determined in step S253 to the terminal device 10 that is the transmission source of the capability information (UECapabilityInformation) message (S254).

It should be noted that the sequence and flowchart described in this embodiment may be rearranged as long as there is no contradiction in processing.

The exemplary embodiments of the present invention have been described above. According to the terminal device 10 and the wireless communication method of the present embodiment, the terminal feature information indicating features other than the features related to wireless communication, which are the features of the terminal device 10 itself, are transmitted to the base station device 50 . This makes it possible to reflect the characteristics of the terminal device 10 when determining functions to be executed by the terminal device 10 regarding wireless communication. Therefore, the function to be executed by the terminal device 10 regarding wireless communication can be determined according to the features of the terminal device 10 other than the function related to wireless communication, and wireless communication more suitable for the terminal device 10 can be performed. can be done.

In addition, according to the base station apparatus 50 of the present embodiment, the function related to wireless communication to be executed by the terminal apparatus 10 is determined based on the terminal type information. As a result, the type of the terminal device 10 indicated by the terminal type information can be reflected in the function to be executed by the terminal device 10 regarding wireless communication. In addition, function setting information indicating settings related to the determined function is transmitted to the terminal device 10 . As a result, functions to be executed by the terminal device 10 regarding wireless communication and settings thereof can be changed according to the type of the terminal device 10 .

It should be noted that the embodiments described above are intended to facilitate understanding of the present invention, and are not intended to limit and interpret the present invention. The present invention may be modified/improved without departing from its spirit, and the present invention also includes equivalents thereof. In other words, any design modifications made by those skilled in the art to the embodiments are also included in the scope of the present invention as long as they have the features of the present invention. For example, each element provided in the embodiment and its arrangement, material, condition, shape, size, etc. are not limited to those illustrated and can be changed as appropriate. In addition, the embodiments are examples, and it goes without saying that partial substitutions or combinations of configurations shown in different embodiments are possible, and these are also included in the scope of the present invention as long as they include the features of the present invention.

10, 10-1, 10-2, 10-3, 10-m... terminal device, 11... receiving unit, 12... information setting unit, 13... transmitting unit, 21... processor, 22... memory, 23... storage device, 24... communication device, 25... input device, 26... output device, 27... antenna, 50, 50-1, 50-n... base station apparatus, 51... transmitter, 52... receiver, 53... function determination unit, 90 ... core network device, 100 ... wireless communication system.

Claims

A terminal device that performs wireless communication with a base station device,
a receiving unit that receives an inquiry from the base station device when in a connected state with the base station device using a predetermined frequency band;
an information setting unit configured to set, based on the inquiry, terminal characteristic information indicating a characteristic of the terminal other than the function related to the wireless communication;
a transmission unit that transmits the terminal characteristic information to the base station device;
Terminal equipment.
The terminal characteristic information includes at least one of mobility information about mobility, channel variation information about channel variation, size information about dimensions, and usage mode information about usage mode,
The terminal device according to claim 1.
The information setting unit sets terminal type information indicating its own type based on the inquiry,
The transmission unit transmits the terminal type information to the base station device,
The terminal device according to claim 1 or 2.
The receiving unit receives a capability information inquiry from the base station device when in the connected state,
The information setting unit sets the terminal characteristic information and capability information indicating a function supported by itself in the wireless communication based on the inquiry about the capability information,
The transmission unit includes the terminal characteristic information in the capability information and transmits the capability information to the base station device.
The terminal device according to any one of claims 1 to 3.
The predetermined frequency band is included in a frequency range of 410 MHz or more and 7125 MHz or less.
The terminal device according to any one of claims 1 to 4.
A base station device that performs wireless communication with a terminal device,
a receiving unit that receives terminal type information indicating a type of the terminal device from the terminal device when the terminal device is in a connected state using a predetermined frequency band;
a function determination unit that determines, based on the terminal type information, a function related to the wireless communication that is to be executed by the terminal device;
a transmitting unit configured to transmit function setting information indicating settings related to the determined function to the terminal device;
Base station equipment.
A wireless communication method used in a terminal device that performs wireless communication with a base station device,
receiving an inquiry from the base station device when in a connected state with the base station device using a predetermined frequency band;
a step of setting terminal characteristic information indicating characteristics of the terminal device other than the function related to the wireless communication, based on the inquiry;
and transmitting the terminal characteristic information to the base station device.
wireless communication method.