Communication device and communication method

Abstract

This communication device comprises: a transmission unit that transmits a connection request to a first communication device; a reception unit that receives a connection permission from the first communication device; and a control unit that establishes a first connection to the first communication device. The control unit controls the communication of a second communication device and performs a communication with the second communication device. The second communication device communicates with a third communication device that comprises: a transmission unit that transmits a connection request to the first communication device; a reception unit that receives a connection permission from the first communication device; and a control unit that establishes a first connection to the first communication device.

Description

[Technical Field]

[0001] The present invention relates to a communication device and a communication method in a wireless communication system. [Background technology]

[0002] The 3GPP (3rd Generation Partnership Project) is currently studying a wireless communication system called 5G or NR (New Radio) (hereinafter, this wireless communication system will be referred to as "NR") in order to achieve a larger system capacity, a higher data transmission speed, and a lower latency in wireless sections. In 5G, various wireless technologies and network architectures are being studied to meet the requirements of achieving a throughput of 10 Gbps or more while keeping the latency in wireless sections to 1 ms or less (for example, Non-Patent Document 1).

[0003] Furthermore, studies on 6G have begun as the next-generation wireless communication system after 5G, and it is expected to achieve wireless quality that exceeds that of 5G. For example, studies are underway for 6G to achieve even higher capacity, the use of new frequency bands, even lower latency, even higher reliability, and the expansion of coverage to new areas (high altitude, sea, and space) (for example, Non-Patent Document 2). [Prior art documents] [Non-patent literature]

[0004] [Non-Patent Document 1] 3GPP TS 38.300 V16.4.0 (2020-12) [Non-patent document 2] NTT Docomo White Paper: 5G Advancements and 6G (2020-01) Summary of the Invention [Problem to be solved by the invention]

[0005] 6G is expected to use even higher frequencies than conventional ones in order to further improve communication speed, capacity, reliability, and latency performance. When using such high frequencies, ultra-wide bandwidth is available, enabling higher speeds, and shorter symbol lengths enable lower latency. However, it is expected that the coverage will be narrower due to the high attenuation rate, and reliability will decrease due to the high directivity.

[0006] Due to the characteristics of this frequency band, which uses high frequencies, it is important to ensure redundancy in order to provide services to areas where 6G communications are required.

[0007] The present invention has been made in view of the above points, and has as its object to ensure network redundancy in a wireless communication system. [Means for solving the problem]

[0008] According to the disclosed technology, a first communication device includes a first transmitting unit that transmits a connection request to a first communication device, a first receiving unit that receives a connection permission from the first communication device, and a first control unit that establishes a first connection with the first communication device, 1st a control unit that controls communication of a second communication device and communicates with the second communication device, the second communication device communicates with a third communication device having a second transmission unit that transmits a connection request to the first communication device, a second reception unit that receives a connection permission from the first communication device, and a second control unit that establishes the first connection with the first communication device, the first control unit shares information with the third communication device, the first control unit determines the third communication device with which the second communication device will communicate based on the shared information, and the first transmission unit transmits the same data as the third communication device , communication between the third communication device and the second communication device; In the same frequency band 、 A communication device is provided that transmits to the second communication device. [Effects of the Invention]

[0009] The disclosed technology provides a technology for ensuring network redundancy in a wireless communication system. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a diagram illustrating an example (1) of a wireless communication system according to an embodiment of the present invention. [Figure 2] FIG. 2 is a diagram illustrating an example (2) of a wireless communication system according to an embodiment of the present invention. [Figure 3] FIG. 1 is a diagram illustrating an example of a network configuration according to an embodiment of the present invention. [Figure 4] FIG. 2 is a diagram illustrating an example of inter-device connection according to an embodiment of the present invention. [Figure 5] FIG. 10 is a sequence diagram illustrating an example of establishing a connection according to an embodiment of the present invention. [Figure 6] FIG. 10 is a sequence diagram for explaining an example (1) of an information report according to an embodiment of the present invention. [Figure 7] FIG. 10 is a sequence diagram illustrating an example (2) of an information report according to an embodiment of the present invention. [Figure 8] FIG. 10 is a sequence diagram illustrating an example of function activation according to an embodiment of the present invention. [Figure 9] FIG. 2 is a diagram for explaining an example (1) of transmission and reception of recommended information according to an embodiment of the present invention. [Figure 10] FIG. 10 is a diagram illustrating an example (2) of transmission and reception of recommended information according to an embodiment of the present invention. [Figure 11] FIG. 1 is a diagram for explaining an example (1) of an initial access in an embodiment of the present invention. [Figure 12] FIG. 10 is a sequence diagram illustrating an example (2) of initial access according to the embodiment of the present invention. [Figure 13] FIG. 10 is a sequence diagram illustrating an example (3) of initial access according to an embodiment of the present invention. [Figure 14]FIG. 10 is a sequence diagram illustrating an example (4) of initial access in the embodiment of the present invention. [Figure 15] FIG. 10 is a diagram illustrating an example (5) of initial access in the embodiment of the present invention. [Figure 16] FIG. 10 is a diagram illustrating an example (6) of initial access in the embodiment of the present invention. [Figure 17] FIG. 1 is a diagram for explaining an example (1) of a connection with a plurality of devices in an embodiment of the present invention. [Figure 18] FIG. 10 is a diagram illustrating an example (2) of a connection with a plurality of devices according to an embodiment of the present invention. [Figure 19] FIG. 10 is a diagram illustrating an example (3) of a connection with a plurality of devices according to an embodiment of the present invention. [Figure 20] FIG. 10 is a diagram illustrating an example (4) of a connection with a plurality of devices in an embodiment of the present invention. [Figure 21] FIG. 10 is a diagram illustrating an example (5) of a connection with multiple devices in an embodiment of the present invention. [Figure 22] FIG. 10 is a diagram illustrating an example (6) of a connection with multiple devices in an embodiment of the present invention. [Figure 23] FIG. 10 is a diagram illustrating an example (7) of a connection with multiple devices in an embodiment of the present invention. [Figure 24] FIG. 10 is a diagram illustrating an example (8) of a connection with multiple devices in an embodiment of the present invention. [Figure 25] FIG. 10 is a diagram illustrating an example (9) of a connection with multiple devices according to an embodiment of the present invention. [Figure 26] FIG. 10 is a diagram illustrating an example (10) of a connection with multiple devices according to an embodiment of the present invention. [Figure 27] FIG. 2 is a diagram illustrating an example (1) of an operation related to an emergency notification in the embodiment of the present invention. [Figure 28] FIG. 10 is a diagram illustrating an example (2) of an operation related to an emergency notification in the embodiment of the present invention. [Figure 29]2 is a diagram illustrating an example of a functional configuration of a base station 10 according to an embodiment of the present invention. [Figure 30] FIG. 2 is a diagram illustrating an example of a functional configuration of a terminal 20 according to the embodiment of the present invention. [Figure 31] 2 is a diagram illustrating an example of a hardware configuration of a base station 10 or a terminal 20 according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Note that the embodiment described below is an example, and the embodiment to which the present invention is applied is not limited to the following embodiment.

[0012] In operation of the wireless communication system according to the embodiment of the present invention, an existing technology may be used as appropriate, such as, but not limited to, the existing NR or LTE.

[0013] Fig. 1 is a diagram illustrating an example (1) of a wireless communication system according to an embodiment of the present invention. As shown in Fig. 1, the wireless communication system according to the embodiment of the present invention includes a base station 10 and a terminal 20. Although Fig. 1 shows one base station 10 and one terminal 20, this is an example, and there may be a plurality of each.

[0014] The base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20. The physical resources of a wireless signal are defined in the time domain and the frequency domain, and the time domain may be defined by the number of OFDM symbols, and the frequency domain may be defined by the number of subcarriers or the number of resource blocks. Furthermore, a TTI (Transmission Time Interval) in the time domain may be a slot, or a TTI may be a subframe.

[0015] Base station 10 is capable of performing carrier aggregation, which aggregates multiple cells (multiple CCs (component carriers)) to communicate with terminal 20. In carrier aggregation, one PCell (primary cell) and one or more SCells (secondary cells) are used.

[0016] The base station 10 transmits a synchronization signal, system information, and the like to the terminal 20. The synchronization signal is, for example, NR-PSS and NR-SSS. The system information is transmitted, for example, on the NR-PBCH or PDSCH, and is also called broadcast information. As shown in FIG. 1 , the base station 10 transmits control signals or data to the terminal 20 on the DL (Downlink) and receives control signals or data from the terminal 20 on the UL (Uplink). Note that, here, what is transmitted on a control channel such as the PUCCH or PDCCH is called a control signal, and what is transmitted on a shared channel such as the PUSCH or PDSCH is called data, but these names are merely examples.

[0017] The terminal 20 is a communication device equipped with a wireless communication function, such as a smartphone, a mobile phone, a tablet, a wearable terminal, or an M2M (Machine-to-Machine) communication module. As shown in Fig. 1, the terminal 20 receives control signals or data from the base station 10 via DL and transmits control signals or data to the base station 10 via UL, thereby utilizing various communication services provided by the wireless communication system. The terminal 20 may be referred to as a UE, and the base station 10 may be referred to as a gNB.

[0018] Terminal 20 is capable of performing carrier aggregation, which aggregates multiple cells (multiple CCs (component carriers)) to communicate with base station 10. In carrier aggregation, one PCell (primary cell) and one or more SCells (secondary cells) are used. Also, a PUCCH-SCell having a PUCCH may be used.

[0019] Fig. 2 is a diagram illustrating an example (2) of a wireless communication system according to an embodiment of the present invention. Fig. 2 shows a configuration example of a wireless communication system in which DC (Dual connectivity) is implemented. As shown in Fig. 2, a base station 10A serving as an MN (Master Node) and a base station 10B serving as an SN (Secondary Node) are provided. The base station 10A and the base station 10B are each connected to a core network. The terminal 20 can communicate with both the base station 10A and the base station 10B.

[0020] A cell group provided by base station 10A, which is an MN, is called an MCG (Master Cell Group), and a cell group provided by base station 10B, which is an SN, is called an SCG (Secondary Cell Group). In addition, in a DC, an MCG is composed of one PCell and one or more SCells, and an SCG is composed of one PSCell (Primary SCG Cell) and one or more SCells.

[0021] DC may be a communication method using two communication standards, and any combination of communication standards may be used. For example, the combination may be NR and 6G standards, or LTE and 6G standards. DC may also be a communication method using three or more communication standards, and may be called by a name other than DC.

[0022] The processing operations in this embodiment may be performed in the system configuration shown in FIG. 1, in the system configuration shown in FIG. 2, or in a system configuration other than these.

[0023] Here, 6G is expected to use even higher frequencies than conventional ones to further improve communication speed, capacity, reliability, and latency performance. For example, it is expected that ultra-high-speed communication on the order of terabits per second, high reliability at the optical communication level, and low latency will be required. For example, when using high frequencies such as terahertz waves, high speeds are possible because ultra-wide bandwidths are available, and low latency is possible due to short symbol lengths. On the other hand, it is expected that coverage will be narrowed due to high attenuation rates, and reliability will be reduced due to high directivity.

[0024] Due to the characteristics of this frequency band, which uses high frequencies, it is important to ensure redundancy in order to provide services to areas where 6G communications are required.

[0025] Therefore, it is being considered that users, rather than MNOs (Mobile network operators), install access points (APs) and perform wireless communication between the APs and UEs. Hereinafter, APs are also referred to as configurable access points (C-APs). However, the name is not limited to this and may be a UE or any communication device. Furthermore, C-APs may be installed by MNOs rather than users. Furthermore, devices connected to C-APs are not limited to UEs and may be any communication devices.

[0026] FIG. 3 is a diagram illustrating an example of a network configuration according to an embodiment of the present invention. As shown in FIG. 3, an AP is connected to the Internet via a fixed line, utilizing the high speed, high reliability, and low latency of optical communication. Alternatively, the AP may be connected to the Internet via wireless communication. The AP and UE are connected via 6G wireless communication. For example, high-frequency wireless communication may be used. The AP may be controlled by the MNO via wired communication via a fixed line, or may be controlled by the MNO via wireless communication (e.g., with a conventional base station). The control may be, for example, turning the C-AP on / off, configuring wireless resources available to the C-AP, or configuring communication between the C-AP and the UE.

[0027] As shown in Figure 3, a U-plane connection of the UE may be established between the C-AP and the Internet, or a C-plane connection of the UE may be established between the C-AP and a BS (Base Station). The UE may also be capable of wireless communication with the BS. The BS is connected to a core network.

[0028] Fig. 4 is a diagram showing an example of an inter-device connection in an embodiment of the present invention. As shown in Fig. 4, when establishing a connection between a C-AP and an MNO, wireless or wired communication is performed between device 10A having a predetermined function corresponding to the C-AP and device 10B that controls device 10A. Hereinafter, the predetermined function will be referred to as function X. Function X may be a function for controlling wireless communication with terminal 20 or a function for executing wireless communication with terminal 20. As shown in Fig. 4, multiple devices 10A may be connected to device 10B.

[0029] The device 10A may be any of the following 1) to 4).

[0030] 1) A base station device not included in device 10B may be, for example, one or more of a CU (Central Unit), a DU (Distributed Unit), and an RU (Radio Unit), or may be a device corresponding to any PLMN (Public Land Mobile Network). 2) Device 10A may be a function or a system. 3) Device 10A may be any device, function, or system that device 10B does not provide. 4) The device 10A may be a UE, an AP, or an AP with UE functionality, but is not limited to these.

[0031] The device 10B may be any of the following 1)-4).

[0032] 1) It may be one or more of a CU (Central Unit), DU (Distributed Unit), and RU (Radio Unit) that make up a base station device, or it may be a device that corresponds to any PLMN (Public Land Mobile Network). 2) Device 10B may be a function or a system. 3) Device 10B may be any device, function or system provided by the MNO. 4) The device 10B may be, but is not limited to, a UE, an AP, or an AP with UE functionality.

[0033] The terminal 20 may be a UE or the device 10A, but is not limited to these, and may be any communication device. The terminal 20 can establish a connection in the PLMN to which the device 10A belongs via the device 10A.

[0034] The communication between the device 10A and the device 10B may be wireless communication via a predetermined frequency or may be wired communication. The wireless communication may use the same radio access technology (RAT) as the wireless communication between the device 10A and the terminal 20, or may use a different RAT. The predetermined frequency may be the same frequency as the wireless communication between the device 10A and the terminal 20, or may be a different frequency. The device 10A may operate as a UE when communicating with the device 10B.

[0035] A connection may be established between device 10A and device 10B. Fig. 5 is a sequence diagram for explaining an example of connection establishment in an embodiment of the present invention. That is, device 10B may recognize device 10A. Note that at least one of the following steps may not be executed.

[0036] In step S101, device 10B may broadcast information requesting a signal from device 10A. Step S101 may or may not be performed. In step S102, device 10A transmits a signal announcing its presence and / or a connection request to device 10B.

[0037] In the following step S103, device 10B identifies the individual based on the signal from device 10A. In the following step S104, device 10B transmits a signal to device 10A notifying that connection has been permitted and / or completed, or that connection has not been permitted. In the following step S105, after receiving the signal related to connection permission and / or completion, device 10A transmits an acknowledgement response to device 10B. When steps up to S105 have been completed, it may be determined that a connection has been established between device 10A and device 10B.

[0038] When establishing a connection, for example, in step S102 or step S105, a signal transmitted from device 10A to device 10B may include information related to one or more of the PLMN to which the device 10A wishes to connect, the capability related to communication control of terminal 20, the service type, communication requirements, coverage area, location information, supported frequencies, and antenna and / or beam radio characteristics. The location information may be the location information of device 10A or the location information of terminal 20.

[0039] Depending on the connection status between the device 10A and the device 10B, the following predetermined operations 1) to 3) may be performed.

[0040] 1) Connection management and / or maintenance may be performed using a predetermined timer. For example, a signal related to the connection may be transmitted and received periodically. For example, if the transmission and reception of the predetermined signal is not completed before the predetermined timer expires, the connection may be determined to be lost.

[0041] 2) If the connection is lost, device 10A may stop function X.

[0042] 3) If the connection is lost, the device 10A may notify the subordinate terminal 20 that function X will be stopped. For example, the device 10A may stop function X after a predetermined time has elapsed after the notification.

[0043] The above-described embodiment allows a connection to be established between a C-AP and a device that controls the C-AP.

[0044] Predetermined information may be transmitted from device 10A, which is already connected to device 10B, to device 10B. The predetermined information may be transmitted at least either before or during device 10A's operation as a C-AP. The operation as a C-AP may be wireless communication with terminal 20 or an operation related to function X.

[0045] FIG. 6 is a sequence diagram for explaining an example (1) of information reporting in an embodiment of the present invention. In step S200, a connection is established between device 10A and device 10B. In step S201, device 10B transmits a signal requesting information to device 10A. Step S201 may or may not be executed. In step S202, device 10A transmits predetermined information to device 10B. In the following step S203, device 10A may further transmit the predetermined information to device 10B.

[0046] The timing of transmitting the predetermined information may be periodic, or the period may be specified in advance. Alternatively, the timing of transmitting the predetermined information may be set by device 10B after connection is completed. Furthermore, the timing of transmitting the predetermined information may be the timing when device 10A enables the function as a C-AP, i.e., the function related to wireless communication with terminal 20, or the timing when device 10A updates the function related to wireless communication with terminal 20. Furthermore, the timing of transmitting the predetermined information may be the timing based on a request from terminal 20.

[0047] The predetermined information may be one or more of the following 1) to 4).

[0048] 1) Channel state, which may be, for example, information on the target frequency, channel usage status, interference power value or level, other detectable devices 10A, and propagation characteristic measurements.

[0049] 2) Service conditions, such as service type, communication requirements, coverage area, number of devices accommodated, communication time, data volume, and degree of fulfillment of requirements.

[0050] 3) Status of the device 10A, which may be, for example, location information, information related to the Global Navigation Satellite System (GNSS), latitude and longitude, altitude, area formation angle, etc.

[0051] 4) Information related to terminals 20 that can connect when operating as a C-AP, i.e., when function X is enabled. For example, the information may be the number of terminals 20, location information, information related to GNSS, latitude and longitude, altitude, area formation angle, etc.

[0052] All or part of the predetermined information may be selected to be transmitted based on an instruction from device 10B or a decision made by device 10A.

[0053] The acquisition of the predetermined information in the device 10A may be performed based on a broadcast signal and / or a reference signal from the device 10A, or transmission and reception of signals may be performed between a plurality of devices 10A. Furthermore, the acquisition of the predetermined information in the device 10A may be performed based on a transmission signal and / or a reference signal from each terminal 20. In order to acquire the predetermined information, limited communication between the device 10A and the terminal 20 may be permitted. The limited communication may be performed after permission is obtained from the device 10B. Furthermore, the limited communication may be performed without obtaining permission from the device 10B.

[0054] 7 is a sequence diagram illustrating an example (2) of an information report according to an embodiment of the present invention. Predetermined information may be transmitted from terminal 20 to device 10B. In step S301, terminal 20 may transmit the predetermined information to device 10A. In the subsequent step S302, device 10A may transmit the received predetermined information to device 10B. In the subsequent step S303, terminal 20 may further transmit the predetermined information to device 10B via device 10A. Furthermore, in step S311, terminal 20 may transmit the predetermined information to device 10B via direct wireless communication. As described above, the operation of transmitting the predetermined information from terminal 20 to device 10B via direct wireless communication may be limited to the case where device 10A and device 10B perform wireless communication.

[0055] The timing of transmitting the predetermined information may be periodic, or the period may be specified in advance. Alternatively, the timing of transmitting the predetermined information may be set by the device 10A or the device 10B. Furthermore, the timing of transmitting the predetermined information may be based on a request from the device 10B to the terminal 20.

[0056] The predetermined information may be one or more of the following 1) and 2).

[0057] 1) Channel state, which may be, for example, information on the target frequency, channel usage status, interference power value or level, other detectable devices 10A, and propagation characteristic measurements.

[0058] 2) Evaluation of the device 10A, for example, the identification number of the device 10A, the quality of communication via the device 10A, the degree of achievement of the request, etc.

[0059] The acquisition of the predetermined information in terminal 20 may be performed based on a broadcast signal, a transmission signal, or a reference signal from device 10A. For example, limited communication between device 10A and terminal 20 may be permitted in order to acquire the predetermined information. The limited communication may be performed after obtaining permission from device 10B. Alternatively, the limited communication may be performed without obtaining permission from device 10B.

[0060] According to the above-described embodiment, after establishing a connection between the C-AP and the device controlling the C-AP, the C-AP can notify the device controlling the C-AP of information related to the execution of function X.

[0061] 8 is a sequence diagram illustrating an example of function activation in an embodiment of the present invention. Device 10A may receive signal P related to the execution of function X from device 10B. In step S401, device 10B transmits signal P related to the execution of function X, i.e., a function for controlling wireless communication of a terminal and a function for performing wireless communication with the terminal, to device 10A.

[0062] It may be assumed that device 10A may receive signal P from device 10B at any timing. That is, signal P may be transmitted from device 10B to device 10A upon an MNO trigger.

[0063] When the device 10A executes function X, it may send a request for feature enablement or feature update to the device 10B, and thereafter receive a signal P from the device 10B. That is, the signal P may be sent from the device 10B to the device 10A by a C-AP trigger. Furthermore, when the device 10A stops executing function X, it may send a request for feature disablement to the device 10B, and thereafter receive a signal P from the device 10B. When sending the request, the device 10A may report communication parameters and / or resources to be used to the device 10B. Note that the device 10A may be permitted to send the request to the device 10B only when a predetermined condition is met.

[0064] When there is a device 10A that desires to execute function X, the terminal 20 may transmit to the device 10B a request to enable or update function X in the device 10A. That is, a signal P may be transmitted from the device 10B to the device 10A by a UE trigger. Furthermore, when there is a device 10A that desires to stop executing function X, the terminal 20 may transmit to the device 10B a request to disable function X in the device 10A. In the case of a UE trigger, the operation of the device 10A may be the same as in the case of an MNO trigger. Note that the terminal 20 may be permitted to transmit the request to the device 10B only when a predetermined condition is satisfied. The request from the terminal 20 to the device 10B may be transmitted via a device 10A other than the device 10A that is the target of the request, or may be transmitted directly from the terminal 20 to the device 10B via wireless communication. Only when wireless communication is performed between the device 10A and the device 10B, the request may be transmitted directly from the terminal 20 to the device 10B via wireless communication.

[0065] When there is a device 10A that desires to execute function X, the terminal 20 may transmit a request to the device 10A to enable or update function X. The device 10A may receive a signal P from the device 10B by forwarding the request to the device 10B. That is, the signal P may be transmitted from the device 10B to the device 10A by a UE trigger. Furthermore, when there is a device 10A that desires to stop the execution of function X, the terminal 20 may transmit a request to the device 10A to stop function X. In the case of a UE trigger, the operation of the device 10A may be the same as in the case of an MNO trigger. Note that the terminal 20 may be permitted to transmit the request to the device 10A only when a predetermined condition is satisfied.

[0066] In the case of the above-mentioned MNO trigger or C-AP trigger, at least some of the procedures 1)-4) below may be applied.

[0067] 1) Information inviting device 10A to enable function X may be transmitted from device 10B to device 10A. The information may be PHY signaling via PDCCH, signaling via MAC-CE (Media Access Control - Control Element) via PDSCH, or RRC signaling via RRC reconfiguration. The information may include operation details, operation parameters, operation area or location, service requirements, service type, and compensation for the service.

[0068] 2) Information indicating the candidacy of device 10A that is capable of enabling function X may be transmitted from device 10A to device 10B. The information may be PHY signaling via a PUCCH in the form of a RACH or a Scheduling Request (SR), signaling via a Media Access Control - Control Element (MAC-CE) via a PUSCH, or RRC signaling via an RRC reconfiguration request.

[0069] 3) Negotiation may be performed between device 10A and device 10B that are capable of enabling feature X. The negotiation may be regarding, for example, operation details, operation parameters, priority for future enablement of feature X, cost burden or cost reduction for enablement of feature X, etc. The negotiation may be PHY signaling via PDCCH and / or PUCCH, MAC-CE signaling via PDSCH and / or PUSCH, or RRC signaling via RRC reconfiguration and / or reconfiguration request.

[0070] 4) For device 10A that is capable of enabling function X, an instruction to enable function X may be transmitted from device 10B to device 10A. The information may be PHY signaling via the PDCCH, MAC-CE signaling via the PDSCH, or RRC signaling by an RRC reconfiguration request.

[0071] The radio resources required for the above signaling may be defined in the specifications, or may be set or notified by the device 10B.

[0072] The predetermined condition that enables transmission of the request in the above-mentioned C-AP trigger and UE trigger may be a condition based on one or more of the following: For example, the condition may be based on the PLMN, the capability of the device 10A, the capability of the terminal 20, the service type, the device group, the location of the device 10A, the location of the terminal 20, the altitude of the device 10A, the Reference Signal Received Power (RSRP), Reference Signal Received Quality (RSRQ), or Received Signal Strength Indicator (RSSI), or distance between the device 10A and the terminal 20, the mobility level of the device 10A or the terminal 20, or the device type or category (normal, transport, drone, etc.) of the device 10A or the terminal 20.

[0073] The information included in the signal P may be one or more of the following items 1) to 4).

[0074] 1) A function enabling instruction and communication parameters for the device 10A that has not yet executed the function X. The communication parameters may be permissions for the communication parameters reported from the device 10A to the device 10B. 2) Function activation is not permitted for device 10A that has not yet executed function X. 3) An instruction to disable function X for device 10A that is currently executing function X. 4) A function activation continuation instruction and update parameters for device 10A executing function X. The update parameters may be permissions for communication parameters reported from device 10A to device 10B.

[0075] Upon receiving the signal P, the device 10A may perform one or more of the following operations 1)-2).

[0076] 1) Device 10A may enable function X (or continue to enable it if it is already enabled) based on the received parameters and start communication with terminal 20. 2) Device 10A may disable function X and terminate communication with terminal 20. Before disabling function X, device 10A may notify terminal 20 of information indicating that function X will be disabled. Terminal 20 that has received this notification may attempt to connect to another device 10A or device 10B.

[0077] The above operation may be executed after a predetermined time has elapsed from the timing of receiving the signal P from the device 10B.

[0078] The wireless communication parameters that device 10A receives from device 10B may be, for example, one or more of the following 1)-5).

[0079] 1) Parameters related to transmission timing 2) Available resources, e.g., time, frequency, space, code 3) Available frequencies, e.g., bands, band combinations, carrier components 4) Scheduling rules or constraints, e.g., proportional fair, latency aware 5) Parameters related to transmission power control and beamforming (spatial filter, directivity) of the device 10A or the terminal 20

[0080] 9 is a diagram illustrating an example (1) of transmission and reception of recommended information according to an embodiment of the present invention. As shown in FIG. 9, device 10A may receive recommendation or advisory information Q related to the installation of device 10A from device 10B. That is, a recommendation or advisory for a user who installs a C-AP is assumed.

[0081] The device 10A may receive the information Q in association with the notification of denial of function activation in the signal P. Alternatively, the device 10A may receive the information Q in addition to the notification of denial of function activation. Alternatively, the device 10A may receive the information Q instead of the notification of denial of function activation. In other words, the reception of the information Q may mean that the function activation is not permitted.

[0082] Information Q may be transmitted from device 10B based on a request from device 10A and received by device 10A. The request may be transmitted in addition to or instead of the predetermined information transmitted from device 10A to device 10B in step S202. The request may also be a request to enable or update function X transmitted from device 10A to device 10B.

[0083] Information Q may be transmitted from device 10B and received by device 10A in association with an operation related to connection establishment between device 10A and device 10B. Information Q may be transmitted in addition to a signal related to connection permission or completion, or may be transmitted instead of a signal related to connection permission or completion. In other words, reception of information Q may mean connection permission or completion.

[0084] Information Q may be received by device 10A from device 10B even when function X is enabled. For example, information Q may be received by device 10A in conjunction with an operation relating to an instruction to continue function X and to provide updated parameters, or may be received by device 10A in conjunction with an operation relating to an instruction to disable function X, or may be received by device 10A instead of an operation relating to an instruction to disable function X.

[0085] 10 is a diagram for explaining an example (2) of recommended information transmission and reception in the embodiment of the present invention. Information Q may be one or more of 1) to 5) shown below.

[0086] 1) It may be information related to propagation characteristic measurements, such as RSRP, RSRQ, RSSI, etc. between device 10A and terminal 20, between device 10A and another device 10A, or between device 10A and device 10B.

[0087] 2) It may be information relating to a location as shown in Fig. 10. For example, it may be GNSS information, latitude and longitude, altitude, area formation angle, or information indicating which zone a plane is divided into when the plane is divided into predetermined zones.

[0088] 3) It may be a signal to be received or measured. For example, it may be the type, sequence, ID, or resource of the signal.

[0089] 4) It may be information related to a transmission signal. For example, it may be a signal for acquiring predetermined information transmitted from apparatus 10A to apparatus 10B in step S202, and may be information related to a signal between apparatus 10A and terminal 20, between apparatus 10A and apparatus 10A, or between apparatus 10A and apparatus 10B. Also, for example, it may be the type, sequence, ID, frequency, resource, transmission power, beam (information related to a TCI (Transmission Configuration Indicator) state, QCL (Quasi co-location)) of the signal.

[0090] 5) It may be information related to another device 10A, such as a location, a frequency, a resource, or a transmission power.

[0091] The device 10A may report the received information Q to a higher layer. For example, the information may be reported to any of the MAC layer, RRC layer, RLC layer, PDCP layer, and SDAP layer, but is not limited to these. Furthermore, the information may be reported to an application layer, as long as it is a layer higher than the PHY layer. The device 10A may have a function of displaying information based on the information Q on a predetermined screen. For example, the display function may be a function of notifying the user, such as a voice notification, or a notification that turns on or flashes a predetermined indicator light.

[0092] The device 10A may execute control related to transmission and / or reception of the device itself based on the received information Q. The transmission may be a signal related to various status reports (for example, a broadcast signal and / or a reference signal from the device 10A, or a transmission signal and / or a reference signal from each terminal 20), or may be a signal transmission when operating as function X. The control may be a change of service conditions (for example, a service type, communication requirements, a coverage area, the number of devices accommodated, communication time, data volume, the degree of achievement of requirements, etc.). The control may be a change of parameters used for transmission, and for example, the change of the parameters may be for the type, sequence, ID, frequency, resource, transmission power reduction, or beam (TCI state, QCL) limitation.

[0093] After the C-AP is installed based on the information Q, the device 10A may transmit a response completion signal to the device 10B. When the device 10A detects that a condition based on the information Q is satisfied, the device 10A may transmit the response completion signal to the device 10B. For example, when a predetermined propagation characteristic measurement value exceeds or falls below a threshold value in a predetermined time period, the device 10A may transmit the response completion signal to the device 10B. After transmitting the response completion signal to the device 10B, the device 10A may apply an operation related to enabling, disabling, or updating the function X. Furthermore, after transmitting the response completion signal to the device 10B, the device 10A may receive an acknowledgement response from the device 10B, and may enable the function X upon receiving the acknowledgement response.

[0094] The above-described embodiment enables device 10A, which is a C-AP, to know the conditions for enabling function X, and enables the owner of device 10A to install device 10A in an appropriate manner.

[0095] 11 is a diagram illustrating an example (1) of initial access in an embodiment of the present invention. As shown in FIG. 11, communication related to a connection may be performed between device 10A executing function X and terminal 20. A connection may be established between device 10A and terminal 20, or a connection may be established between device 10B and terminal 20 via device 10A.

[0096] Fig. 12 is a sequence diagram for explaining an example (2) of initial access in an embodiment of the present invention. Fig. 12 is a sequence diagram showing the establishment of a connection between device 10A and terminal 20. Note that, among steps S501 to S505 shown in Fig. 12, some steps may not be executed.

[0097] In step S501, device 10A transmits a synchronization signal and a notification signal to terminal 20. For example, step S501 may correspond to transmission and reception of an SSB (SS / PBCH block) and an SIB. In the following step S502, terminal 20 transmits a signal notifying device 10A of its presence or a connection request. For example, step S502 may correspond to transmission and reception of a PRACH, a RAR (Random Access Response), and Msg3. In the following step S503, device 10A identifies an individual based on the signal from terminal 20.

[0098] In the following step S504, the device 10A transmits a signal to the terminal 20 notifying the terminal 20 of connection permission and / or completion, or connection denial. Step S504 may correspond to the transmission and reception of Msg4. In the following step S505, the terminal 20 receives the signal related to connection permission and / or completion, and then transmits an acknowledgement response to the device 10A. Step S505 may correspond to the transmission and reception of an ACK. When steps up to S505 are completed, it may be determined that a connection has been established between the device 10A and the terminal 20.

[0099] When connection establishment is executed between apparatus 10A and terminal 20, that is, when a UL-CCCH (Common Control Channel) message (e.g., an RRC setup request), a DL-CCCH message (RRC setup), and a UL-DCCH (Dedicated Control Channel) message (e.g., an RRC setup complete) are transmitted and received between apparatus 10A and terminal 20, information related to terminal 20 may be transmitted from apparatus 10A to apparatus 10B in the above initial access. Also, information related to connection permission or denial may be transmitted from apparatus 10B to apparatus 10A. Apparatus 10A may execute step S504 based on the information.

[0100] Fig. 13 is a sequence diagram for describing an example (3) of initial access in an embodiment of the present invention. In Fig. 13, a connection is established between apparatus 10B and terminal 20 via apparatus 10A. When establishing a connection between apparatus 10B and terminal 20, that is, when a UL-CCCH message (e.g., an RRC setup request), a DL-CCCH message (RRC setup), and a UL-DCCH message (e.g., an RRC setup complete) are transmitted and received between apparatus 10B and terminal 20, during initial access, apparatus 10A may transmit information related to collision resolution (e.g., Msg4) to terminal 20 after all information related to connection establishment (e.g., RRC setup) has been received.

[0101] In step S601, the apparatus 10B transmits a notification that function X is enabled to the apparatus 10A. In the following step S602, the apparatus 10A transmits a synchronization signal and a broadcast signal (for example, SSB and SIB) to the terminal 20. In the following step S603, the terminal 20 transmits a PRACH to the apparatus 10A. In the following step S604, the apparatus 10A transmits an RAR to the terminal 20. In the following step S605, the terminal 20 transmits Msg3 to the apparatus 10A. In the following step S606, the apparatus 10A transmits an RRC setup request based on the received Msg3 to the apparatus 10B. Note that the PRACH, RAR, and Msg3 are not limited to these, and may be transmission or reception related to a signal notifying the presence of the terminal 20 to the apparatus 10A or a connection request.

[0102] In the following step S607, the device 10B transmits an RRC setup (all at once, i.e., all information related to connection establishment) to the device 10A. In the following step S608, the device 10A transmits Msg4 based on the received RRC setup to the terminal 20. Note that the RRC setup and Msg4 are not limited to these, and may be any signal that notifies the terminal 20 of connection permission and / or completion, or connection denial. In step S608, collision resolution is successful and the random access procedure is completed. In the following step S609, the terminal 20 transmits an ACK to the device 10A. In the following step S610, the device 10A transmits the RRC configuration to the terminal 20. Step S610 may be repeated for the required RRC configuration. In step S611, the terminal 20 transmits an ACK to the device 10A. In the following step S612, the device 10A transmits an RRC setup completion to the device 10B. The RRC configuration is completed in step S612.

[0103] Here, the service type or service requirements may be notified by SSB, SIB, or RAR. Furthermore, a TC-RNTI (Temporary Cell-Radio Network Temporary Identifier), a UL grant, and a TA (Timing Advance) command may be notified by RAR. The TC-RNTI may be notified from apparatus 10B to apparatus 10A when function X is activated, or may be notified between PRACH and RAR. Furthermore, an interference level report may be performed by Msg3 (MAC-PDU (Protocol data unit)). Furthermore, all or part of the information included in the RRC setup and the information included in the RRC configuration may be the same or different.

[0104] Fig. 14 is a sequence diagram for describing an example (4) of initial access in the embodiment of the present invention. In Fig. 14, a connection is established between apparatus 10B and terminal 20 via apparatus 10A. When a connection is established between apparatus 10B and terminal 20, that is, when a UL-CCCH message (e.g., an RRC setup request), a DL-CCCH message (RRC setup), and a UL-DCCH message (e.g., an RRC setup complete) are transmitted and received between apparatus 10B and terminal 20, during initial access, apparatus 10A may transmit information related to collision resolution (e.g., Msg4) to terminal 20 at a stage when at least a portion of information related to connection establishment (e.g., RRC setup) has been received. Note that when a connection is established between apparatus 10B and terminal 20 via apparatus 10A, the procedure related to initial access shown in Fig. 13 may be executed, or the procedure related to initial access shown in Fig. 14 may be executed.

[0105] In step S701, the apparatus 10B transmits a notification that function X is enabled to the apparatus 10A. In the following step S702, the apparatus 10A transmits a synchronization signal and an announcement signal (for example, SSB and SIB) to the terminal 20. In the following step S703, the terminal 20 transmits a PRACH to the apparatus 10A. In the following step S704, the apparatus 10A transmits an RAR to the terminal 20. In the following step S705, the terminal 20 transmits Msg3 to the apparatus 10A. In the following step S706, the apparatus 10A transmits an RRC setup request based on the received Msg3 to the apparatus 10B. Note that the PRACH, RAR, and Msg3 are not limited to these, and may be transmission or reception related to a signal or connection request that notifies the terminal 20 of its presence to the apparatus 10A.

[0106] In the following step S707, the device 10B transmits the RRC setup (part, i.e., part of the information related to the connection establishment) to the device 10A. In the following step S708, the device 10A transmits Msg4 based on the received RRC setup to the terminal 20. Note that the RRC setup and Msg4 are not limited to these, and may be any signal that notifies the terminal 20 of connection permission and / or completion, or connection denial. In step S708, the collision resolution is successful and the random access procedure is completed. In the following step S709, the terminal 20 transmits an ACK to the device 10A. In the following step S710, the device 10A transmits an ACK report to the device 10B. In the following step S711, the device 10B transmits the RRC setup (i.e., the remaining information related to the connection establishment) to the device 10A. In the following step S712, the device 10A transmits the RRC configuration to the terminal 20. Steps S711 and S712 may be repeated for the required RRC configuration. In step S713, the terminal 20 transmits an ACK to the device 10A. In the following step S714, the device 10A transmits an RRC setup completion to the device 10B. In step S714, the RRC configuration is completed.

[0107] Here, the service type or service requirements may be notified by SSB, SIB, or RAR. Furthermore, the TC-RNTI, UL grant, and TA command may be notified by RAR. The TC-RNTI may be notified from apparatus 10B to apparatus 10A when function X is activated, or may be notified between PRACH and RAR. Furthermore, an interference level report may be performed by Msg3 (MAC-PDU). Furthermore, an ACK report may be performed via PUCCH or PUSCH (MAC-PDU). Furthermore, all or part of the information included in the RRC setup and the information included in the RRC configuration may be the same or different.

[0108] 15 is a diagram illustrating an example (5) of initial access in the embodiment of the present invention. As shown in FIG. 15, a signal related to connection permission or completion may be transmitted from device 10A to terminal 20 based on a signal transmitted from device 10B to device 10A.

[0109] First, device 10A and terminal 20 connect to device 10B. Next, terminal 20 requests device 10B to connect to device 10A. Next, device 10B instructs or requests device 10A to establish a connection with terminal 20. Next, device 10A transmits a signal to terminal 20 notifying that the connection has been permitted or completed, or that the connection has not been permitted. Next, after receiving the signal related to the connection being permitted or completed, terminal 20 transmits an acknowledgement response to device 10A and / or device 10B.

[0110] 16 is a diagram illustrating an example (6) of initial access in the embodiment of the present invention. As shown in FIG. 16, a signal related to connection permission or completion may be transmitted from device 10B to device 10A and terminal 20 based on a signal transmitted from device 10B to terminal 20.

[0111] First, device 10A and terminal 20 connect to device 10B. Next, terminal 20 requests device 10B to connect to device 10A. Next, device 10B transmits a signal to device 10A and terminal 20 notifying that the connection is permitted or completed, or that the connection is not permitted. Next, after receiving the signal related to the connection being permitted or completed, terminal 20 transmits an acknowledgement response to device 10A and / or device 10B.

[0112] In communication related to the connection between device 10A executing the above function X and terminal 20, the signal transmitted from device 10A may include the following. For example, the signal may include PLMN information, the capability of device 10A related to communication control of terminal 20, the capability of terminal 20 that device 10A can support, the type of service provided, the achievable communication requirements, the provided frequency, the device group that can be accommodated, the number of terminals 20 that can be accommodated, the number of terminals 20 that have already been accommodated, the resource usage status, etc. The destination of the signal may be another device 10A, device 10B, or terminal 20.

[0113] In communication relating to the connection between device 10A executing function X and terminal 20, the signal transmitted from terminal 20 may include the following. For example, it may include PLMN information, the capability of the own device, the requested service type, communication requirements, supported frequencies, device group, etc. The destination of the signal may be device 10A, device 10B, or another terminal 20.

[0114] Terminal 20 may be allowed to transmit a connection request to device 10A and / or device 10B only when a predetermined condition is satisfied. The predetermined condition may be a condition based on information related to a synchronization signal and / or a broadcast signal received from device 10A. For example, the information may be PLMN information, capabilities, a service type, a device group, the location of device 10A or terminal 20, the altitude of device 10A or terminal 20, RSRP, RSRQ, RSSI, or distance between device 10A and terminal 20, etc. Furthermore, the predetermined condition may be, for example, that terminal 20 is included in a device group indicated by the synchronization signal and / or broadcast signal.

[0115] The device 10A may be able to transmit a connection permission or completion notification to the terminal 20 only when a predetermined condition is satisfied. If the predetermined condition is not satisfied, the device 10A may notify the terminal 20 that the connection is not permitted. The predetermined condition may be a condition based on information in a signal received from the terminal 20. The information may be, for example, PLMN information, the capabilities of the device itself, the requested service type, communication requirements, supported frequencies, a device group, the location of the device 10A or the terminal 20, the altitude of the device 10A or the terminal 20, the RSRP, RSRQ, RSSI, or distance between the device 10A and the terminal 20, etc. Furthermore, for example, if the device 10A can provide the service type requested by the terminal 20, the device 10A may transmit a connection permission or completion notification to the terminal 20. Furthermore, for example, if the terminal 20 does not receive a connection permission signal from the device 10A within a predetermined time, the terminal 20 may assume that connection to the device 10A is not permitted.

[0116] An operation related to connection termination may be executed between device 10A and terminal 20. For example, device 10A may notify terminal 20 of the connection termination. For example, terminal 20 may notify device 10A of the connection termination. For example, terminal 20 may notify device 10B of the connection termination. For example, device 10A may notify device 10B of the connection termination.

[0117] The notification of the connection termination may include predetermined information, such as the time remaining until the connection is terminated.

[0118] The connection termination may be notified when a predetermined condition is met, for example, when there is no more data to transmit or when a certain period of time has elapsed since there was no more data to transmit.

[0119] A response may be sent in response to receiving the connection termination notification. If the response is an ACK, the connection termination may be permitted. If the response is a NACK, the connection termination may not be permitted and the connection may be maintained.

[0120] According to the above-described embodiment, it is possible to determine a communication partner for performing a desired service and establish communication for executing the service.

[0121] The terminal 20 may communicate with a plurality of devices 10 A. The plurality of devices 10 A that communicate with a certain terminal 20 may be determined by any of the following methods 1) to 3).

[0122] 1) FIG. 17 is a diagram illustrating an example (1) of connection with a plurality of devices in an embodiment of the present invention. As shown in FIG. 17, the device 10A that communicates with the terminal 20 may be determined by the device 10A based on information sharing between the devices 10A. A main device 10A may be determined, and the terminal 20 may connect to the main device 10A. The main device 10A may share information with other devices 10A and determine a sub device 10A that communicates with the terminal 20. The main device 10A may add and delete the sub device 10A. The main device 10A may be changed with handover. That is, the device 10A at the handover destination may be changed to the main device. A wireless or wired interface for sharing information between the devices 10A may be specified.

[0123] 2) FIG. 18 is a diagram illustrating an example (2) of a connection with multiple devices according to an embodiment of the present invention. As shown in FIG. 18, device 10A may share information with device 10B about device 10A that will communicate with terminal 20, and device 10B may determine the device 10A based on the information. That is, device 10A may receive an instruction related to the determination from device 10B. Device 10A may report information related to its own communication status and the connection status of terminal 20 to device 10B. Device 10A may request permission to cooperate with a specific device 10A from device 10B. Device 10A may receive, from device 10B, an instruction to communicate with a specific device 10A in cooperation with a certain terminal 20, as well as parameters related to the communication. Device 10B may instruct a method of cooperation between multiple devices 10A, as described below. Device 10A may share information related to cooperation with the specific device 10A. For example, the method in the example (1) of a connection with multiple devices described above may be applied. The cooperation between the devices 10A may be executed for communication with all terminals 20, not just with a certain terminal 20.

[0124] 3) FIG. 19 is a diagram illustrating an example (3) of a connection with multiple devices according to an embodiment of the present invention. As shown in FIG. 19, a terminal 20 may determine multiple devices 10A with which the terminal 20 will communicate from among devices 10A that the terminal 20 can detect. The terminal 20 may instruct the multiple devices 10A to cooperate based on the signal strength from each device 10A and information received from each device 10A. The terminal 20 may report information related to cooperation to device 10B or request cooperation, and based on the report or request, device 10B may transmit an instruction to cooperate to device 10A. The terminal 20 may instruct a method of cooperation between the multiple devices 10A, which will be described later. An instruction related to the multiple devices 10A transmitted from a certain terminal 20 may be applied to communication between another terminal 20 and the multiple devices 10A. Communication from the terminal 20 to instruct device 10A to cooperate may be performed using a frequency (e.g., a serving cell, a carrier, etc.) used for data transmission and reception, or may be performed using another frequency or RAT.

[0125] Fig. 20 is a diagram for explaining an example (4) of a connection with a plurality of devices in an embodiment of the present invention. As shown in Fig. 20, a plurality of devices 10A and a terminal 20 may transmit and receive data in the same frequency band (for example, a serving cell, a carrier, etc.). That is, a multi-TRP (Transmission Reception Point) configuration may be adopted.

[0126] Different data may be transmitted from terminal 20 to each device 10A in the same frequency band, or different data may be transmitted from each device 10A to terminal 20 in the same frequency band. That is, as shown in FIG. 20 , transport block (TB) #1 and TB #2 may be transmitted to terminal 20 on one CC. The different data may be multiplexed using one or more of time division multiplexing (TDM), frequency division multiplexing (FDM), space division multiplexing (SDM), and code division multiplexing (CDM). Furthermore, resource allocation information used for the transmission may be shared between each device 10A and terminal 20. Control information may be transmitted from each device 10A to terminal 20, or may be transmitted collectively from one device 10A to terminal 20. HARQ feedback for each device 10A may be provided to each device 10A, or may be provided collectively to one device 10A.

[0127] Fig. 21 is a diagram for explaining an example (5) of a connection with a plurality of devices in an embodiment of the present invention. As shown in Fig. 21, a plurality of devices 10A and a terminal 20 may transmit and receive data in the same frequency band (for example, a serving cell, a carrier, etc.). That is, a configuration of multi-TRP (Transmission Reception Point) may be adopted.

[0128] The same data may be transmitted from terminal 20 to each device 10A in the same frequency band, or the same data may be transmitted from each device 10A to terminal 20 in the same frequency band. That is, as shown in FIG. 21 , TB#1 and TB#1 may be transmitted to terminal 20 on one CC. The same data may be multiplexed using any one or more of TDM, FDM, SDM, and CDM. Also, certain data may be transmitted from one device 10A to another device 10A, and then transmitted from the one device 10A and the other device 10A to terminal 20. Control information may be transmitted from each device 10A to terminal 20, or may be transmitted collectively from one device 10A to terminal 20. HARQ feedback for each device 10A may be provided to each device 10A, or may be provided collectively to one device 10A. Terminal 20 may determine that data signals received from multiple devices 10A are signals relating to the same data, or may combine the received multiple data signals to determine whether reception or decoding was successful.

[0129] 22 is a diagram illustrating an example (6) of a connection with a plurality of devices according to an embodiment of the present invention. Terminal 20 may transmit and receive data to and from a plurality of devices 10A in different frequency bands (e.g., serving cells, carriers). That is, carrier aggregation or dual connectivity may be performed via a plurality of devices 10A.

[0130] For example, when device 10A determines device 10A that will communicate with terminal 20, main device 10A may determine a C-SpCell (Configurable Special Cell) shown in FIG. 22. The SpCell may be a cell defined in the same way as an SpCell in NR. When there are multiple cells formed by main device 10A, device 10B may determine the C-SpCell, or device 10A may determine it. When device 10B determines a C-SpCell, it may be notified to device 10A by the CC index.

[0131] When apparatus 10A determines a C-SpCell, the C-SpCell may be determined based on information about terminal 20. For example, the C-SpCell may be determined to be a cell with the largest RSRP, RSRQ, or RSSI among the cells formed by terminal 20 and apparatus 10A, or a cell that satisfies the buffer size of a BSR (Buffer Status Report), or a cell that supports a service type or priority, or the cell may be determined based on a configurable band, band combination, FR (Frequency Range), UE type, UE category, capability, and connection status.

[0132] When the device 10A determines a C-SpCell, the C-SpCell may be determined based on CC information. For example, the C-SpCell may be determined based on the number of PRBs, TDD settings, supported service types, cell usage rate, etc. Furthermore, the device 10A may determine a cell in which the number of connected devices is less than a threshold K as the C-SpCell.

[0133] The device 10A may notify the terminal 20 of the determined C-SpCell. For example, the device 10A may notify the terminal 20 implicitly by transmitting a synchronization signal, or may notify the terminal 20 explicitly by PHY signaling, MAC signaling, RRC signaling, or the like. The PHY signaling may be a DCI field, a DCI format, a CORESET, a search space (SS), or a scrambling RNTI. The MAC signaling may be a MAC-CE. The RRC signaling may be an RRC parameter.

[0134] Fig. 23 is a diagram illustrating an example (7) of connection with multiple devices in an embodiment of the present invention. For example, when device 10B determines device 10A that will communicate with terminal 20, device 10B may determine the C-SpCell shown in Fig. 23. Device 10A may receive from device 10B an instruction indicating which cell to use as the C-SpCell, or may be notified by device 10B using a CC index. For example, when device 10A determines the C-SpCell, device 10B may be instructed by device 10B on information indicating which device 10A will use to determine the C-SpCell. When device 10A determines the C-SpCell, the method described using Fig. 22 may be applied.

[0135] 24 is a diagram illustrating an example (8) of connection with multiple devices in an embodiment of the present invention. For example, when terminal 20 determines device 10A that will communicate with terminal 20, terminal 20 may determine the C-SpCell shown in FIG. 24. When terminal 20 determines the C-SpCell, it may determine which cell to use as the C-SpCell based on the connection order of terminal 20. Furthermore, when terminal 20 determines the C-SpCell, it may determine which cell to use as the C-SpCell based on information from device 10A. The information may be RSRP, RSRQ, RSSI, transmission buffer size, configurable bands / band combinations / FRs, UE type, UE category, capability, number of PRBs, TDD setting, supported service types, cell usage rate, etc.

[0136] When terminal 20 determines a C-SpCell, it may notify device 10A of the determined C-SpCell. For example, terminal 20 may explicitly notify device 10A by PHY signaling, MAC signaling, RRC signaling, or the like. The PHY signaling may be a DCI field, a DCI format, a CORESET, an SS, or a scrambling RNTI. The MAC signaling may be MAC-CE. The RRC signaling may be an RRC parameter. The C-SpCell may be determined by device 10A or device 10B, and the method described using FIG. 22 or 23 may be applied.

[0137] The addition or control method for the C-SCell may be any of the following 1) to 5). The C-SCell may be a cell defined in the same way as an SCell in NR.

[0138] 1) Activation or deactivation may be explicitly notified by signaling such as PHY, MAC, or RRC from the device 10A to the terminal 20, or from the terminal 20 to the device 10A, or from the device 10B to the device 10A and the terminal 20. That is, it may be determined which of the device 10A, the device 10B, and the terminal 20 adds a C-SCell.

[0139] 2) The C-SCell formed by the C-SCell forming device 10A may be always active.

[0140] 3) Activation or deactivation of the C-SCell may be performed based on information between the apparatus 10A and the terminal 20. For example, the C-SCell may be activated when RSRP, RSRQ, and RSSQ exceed X dBm, or may be deactivated when they fall below Y dBm. Furthermore, the C-SCell may be activated when Tx milliseconds have elapsed since RSRP, RSRQ, and RSSQ exceeded X dBm, or may be deactivated when Ty milliseconds have elapsed since they fell below Y dBm. Furthermore, the C-SCell may be activated when the BSR buffer size is M or greater (the buffer size level or index is N or greater), or may be deactivated when it is less than M.

[0141] A C-SCell may be activated when a specific service type or priority communication is required. A C-SCell may be activated or deactivated based on a configurable number of CCs, a band, a band combination, FR, a UE type, or a UE category. A C-SCell may be activated or deactivated based on UE capabilities and connection status (e.g., connection with another UE or a gNB).

[0142] 4) Activation or deactivation may be performed based on information of the C-SpCell and / or the C-SCell. For example, the C-SCell may be activated or deactivated based on the number of PRBs, the TDD setting, the supported service types, and the cell utilization rate. Also, for example, the C-SCell may be activated if the number of connected devices is K or more, or may be deactivated if the number is less than K.

[0143] 5) The C-SCell may be deactivated after a specific time has elapsed since activation.

[0144] Note that the C-SpCell may be a cell among CCs available to the apparatus 10A that can transmit and receive a specific signal, or a cell in which a specific operation is executed, and the name is not limited thereto. For example, among CCs available to the apparatus 10A, a CC that can transmit and receive a synchronization signal (SS), PBCH, PRACH, PUCCH, and PSFCH may be a C-SpCell. Also, for example, among CCs available to the apparatus 10A, a CC that can execute fallback scheduling and initial access may be a C-SpCell.

[0145] In addition, the C-SCell may be a cell that can be used in addition to the C-SpCell among CCs that can be used by the device 10A, and the name is not limited thereto. Activation or deactivation may be replaced with switching. In addition, the above-mentioned cell may be replaced with a BWP or a resource pool.

[0146] Fig. 25 is a diagram for explaining an example (9) of connection with a plurality of devices in an embodiment of the present invention. As shown in Fig. 25, the terminal 20 may change the connection destination from one device 10Aa to another device 10Ab and perform data transmission and reception. In other words, handover may be performed.

[0147] The terminal 20 may monitor signals from multiple devices 10A. When the terminal 20 controls operations related to handover, the terminal 20 may simultaneously establish the above-described connections with multiple devices 10A. The terminal 20 may establish a connection with the device 10Ab based on the connection status with the device 10Aa. For example, the terminal 20 may establish a connection with the device 10Ab when it performs an operation related to terminating the connection with the device 10Aa (for example, when it performs the operation related to terminating the connection described above). Furthermore, for example, the terminal 20 may establish a connection with the device 10Ab when the RSRP, RSRQ, and RSSI between the terminal 20 and the device 10Aa fall below a threshold X times or when they remain below a threshold for a certain period of time. The terminal 20 may terminate the connection with the device 10Aa based on the connection status with the device 10Ab.

[0148] Fig. 26 is a diagram for explaining an example (10) of a connection with a plurality of devices according to an embodiment of the present invention. As shown in Fig. 26, the terminal 20 may change the connection destination from one device 10Aa to another device 10Ab and perform data transmission and reception. In other words, a handover may be performed.

[0149] When the device 10A controls the operation related to handover, the terminal 20 may report the monitoring status of signals from each device 10A to the device 10Aa. The device 10Aa may communicate with the device 10Ab based on information received from the terminal 20. For example, the handover request of the terminal 20, the response, and information related to the terminal 20 (e.g., ID, UE capabilities, etc.) may be shared through this communication. The device 10Ab may communicate with the device 10Aa based on information received from the terminal 20. For example, the handover request of the terminal 20, the response, and information related to the terminal 20 (e.g., ID, UE capabilities, etc.) may be shared through this communication.

[0150] Device 10Ab may communicate with terminal 20 based on information received from device 10Aa or terminal 20. For example, this communication may result in a connection (handover) notification and response to terminal 20. Device 10Aa may communicate with terminal 20 based on information received from device 10Ab or terminal 20. For example, this communication may result in a connection (handover) notification and response to terminal 20.

[0151] C-AP communication related to handover control etc. may be performed as shown in 1)-3) below.

[0152] 1) Communication between the devices 10A may be performed via the device 10B, or may be performed by direct communication between the devices 10A.

[0153] 2) Direct communication between the devices 10 may be sidelink communication. Dedicated resources may be used for the sidelink communication, or resources may be set from the device 10B. The resources may be selected autonomously by the device 10A, or may be determined based on an instruction from the device 10B. A connection (e.g., a PC5-RRC connection) may be established between the devices 10A. The device 10Ab with which the device 10Aa should communicate may be notified by the device 10B, or the device 10Aa may detect it through sidelink communication.

[0154] Data relay between C-APs may be performed as shown in 1)-5) below.

[0155] 1) Data addressed to the terminal 20 may be transmitted from the device 10Aa to the device 10Ab (or from the device 10Ab to the device 10Aa). 2) Device 10Aa or device 10Ab may transmit the relayed data to terminal 20. 3) The connection between the terminal 10Aa and the terminal 20 may or may not be established. 4) Data transmission from device 10Aa to device 10Ab (or from device 10Ab to device 10Aa) may be performed by any of the above C-AP communications. 5) Along with data transmission from device 10Aa to device 10Ab (or from device 10Ab to device 10Aa), control information related to data transmission to terminal 20 may be notified. The control information may be applied to an operation in which data transmission and reception are performed with a plurality of devices 10A in the same frequency band.

[0156] The above-described embodiment enables a plurality of C-APs and UEs to connect to each other, thereby improving reliability and throughput.

[0157] When a predetermined condition is satisfied, device 10A may enable function X and thereafter operate autonomously without control from device 10B. The predetermined condition may be when device 10A transitions to a state in which function X can be enabled. In other words, in a system in which device 10B does not exist, device 10A may enable function X and operate autonomously.

[0158] The predetermined condition may be when a predetermined notification is received from device 10B or another device 10C. Fig. 27 is a diagram for explaining example (1) of an operation related to emergency notification in an embodiment of the present invention. As shown in Fig. 27, when device 10A receives a signal related to an emergency (for example, a disaster), device 10A may enable function X and operate autonomously.

[0159] Furthermore, when device 10A receives a signal permitting the enabling of function X for all devices 10A, device 10A may enable function X and operate autonomously. The other device 10C may be a device that has the authority to transmit a signal permitting the enabling of function X to all PLMNs, not limited to a specific PLMN.

[0160] The predetermined condition may be that, after receiving a predetermined notification from another device (e.g., device 10A, terminal 20, etc.), device 10A does not receive a predetermined notification from device 10B, device 10A enables function X and operates autonomously. FIG. 28 is a diagram for explaining example (2) of an operation related to emergency notification in an embodiment of the present invention. As shown in FIG. 28, device 10A, in a situation where the communication path with device 10B is cut off, may receive a signal related to an emergency (e.g., a disaster occurrence) from another device. Furthermore, device 10A may enable function X and operate autonomously when it receives a signal from another device requesting that some or all of device 10A enable function X.

[0161] The operation details or communication parameters related to function X when operating autonomously may be notified from device 10B to device 10A via a predetermined notification that is a trigger for the operation. Also, the operation details or communication parameters related to function X when operating autonomously may be determined by device 10A without relying on device 10B.

[0162] The operation content or communication parameters related to function X when operating autonomously may be different from the operation when controlled by device 10B. For example, information may be exchanged with another device 10A, and communication parameters may be changed autonomously based on the information. Furthermore, the communication parameters related to function X when operating autonomously may be defined by specifications, or may be, for example, a fallback operation. Furthermore, when performing an operation related to function X when operating autonomously, if a predetermined notification is received from device 10B, function X may be disabled or may be enabled under the control of device 10B.

[0163] According to the above-described embodiment, even in a situation where control by the device 10B is not being executed, if a communication environment by the device 10A is desired, communication by the device 10A is possible.

[0164] According to the above embodiment, a connection can be established between a C-AP and a device controlling the C-AP, and communication of a UE in a target PLMN can be performed via the C-AP.

[0165] That is, network redundancy can be ensured in the wireless communication system.

[0166] (Device configuration) Next, a description will be given of an example of the functional configuration of the base station 10 and the terminal 20 that execute the processes and operations described above. The base station 10 and the terminal 20 include functions for executing the above-described embodiments. However, the base station 10 and the terminal 20 may each include only the functions proposed in any of the embodiments.

[0167] <Base station 10> Fig. 29 is a diagram showing an example of the functional configuration of the base station 10. As shown in Fig. 29, the base station 10 has a transmitting unit 110, a receiving unit 120, a setting unit 130, and a control unit 140. The functional configuration shown in Fig. 29 is merely an example. The names of the functional divisions and functional units may be any as long as they can perform the operations related to the embodiment of the present invention. The transmitting unit 110 and the receiving unit 120 may be called a communication unit.

[0168] The transmitter 110 has a function of generating a signal to be transmitted to the terminal 20 and transmitting the signal wirelessly. The receiver 120 has a function of receiving various signals transmitted from the terminal 20 and acquiring, for example, information of a higher layer from the received signal. The transmitter 110 also has a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL / UL control signals, DL data, etc. to the terminal 20. The transmitter 110 also transmits the setting information, etc., described in the embodiments.

[0169] The setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20 in a storage device, and reads out the information from the storage device as needed. The control unit 140 controls the entire base station 10, including, for example, control related to signal transmission and reception and control related to LBT. Note that the functional unit related to signal transmission in the control unit 140 may be included in the transmitting unit 110, and the functional unit related to signal reception in the control unit 140 may be included in the receiving unit 120. Furthermore, the transmitting unit 110 and the receiving unit 120 may be called a transmitter and a receiver, respectively.

[0170] <Terminal 20> Fig. 30 is a diagram showing an example of the functional configuration of the terminal 20. As shown in Fig. 30, the terminal 20 has a transmitting unit 210, a receiving unit 220, a setting unit 230, and a control unit 240. The functional configuration shown in Fig. 30 is merely an example. The names of the functional divisions and functional units may be any as long as they can execute the operations related to the embodiment of the present invention. The transmitting unit 210 and the receiving unit 220 may be called a communication unit.

[0171] The transmitter 210 creates a transmission signal from the transmission data and transmits the transmission signal wirelessly. The receiver 220 receives various signals wirelessly and acquires higher layer signals from the received physical layer signals. The transmitter 210 also transmits HARQ-ACK, and the receiver 220 receives the setting information and the like described in the embodiments.

[0172] The setting unit 230 stores various setting information received from the base station 10 by the receiving unit 220 in a storage device, and reads it out from the storage device as needed. The setting unit 230 also stores setting information that is set in advance. The control unit 240 performs overall control of the terminal 20, including control related to signal transmission and reception and control related to LBT. Note that the function unit related to signal transmission in the control unit 240 may be included in the transmitting unit 210, and the function unit related to signal reception in the control unit 240 may be included in the receiving unit 220. The transmitting unit 210 and the receiving unit 220 may also be called a transmitter and a receiver, respectively.

[0173] (Hardware configuration) The block diagrams (FIGS. 29 and 30) used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method for realizing each functional block is not particularly limited. That is, each functional block may be realized using a single device that is physically or logically coupled, or may be realized using two or more physically or logically separated devices that are connected directly or indirectly (for example, by wire, wirelessly, etc.) and these multiple devices. The functional block may be realized by combining the single device or the multiple devices with software.

[0174] Functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocation, mapping, and assignment. For example, a functional block (component) that performs transmission is called a transmitting unit or transmitter. As mentioned above, there are no particular limitations on how these functions are implemented.

[0175] For example, the base station 10, the terminal 20, etc. according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 31 is a diagram illustrating an example of the hardware configuration of the base station 10 and the terminal 20 according to an embodiment of the present disclosure. The base station 10 and the terminal 20 described above may be physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0176] In the following description, the term "apparatus" can be read as a circuit, a device, a unit, etc. The hardware configuration of the base station 10 and the terminal 20 may be configured to include one or more of the apparatuses shown in the drawings, or may be configured to exclude some of the apparatuses.

[0177] Each function in the base station 10 and the terminal 20 is realized by loading predetermined software (programs) onto hardware such as the processor 1001, the memory device 1002, etc., so that the processor 1001 performs calculations, controls communication by the communication device 1004, and controls at least one of reading and writing data in the memory device 1002 and the auxiliary memory device 1003.

[0178] The processor 1001 controls the entire computer by running, for example, an operating system. The processor 1001 may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, the above-mentioned control unit 140, control unit 240, etc. may be realized by the processor 1001.

[0179] Furthermore, the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the auxiliary storage device 1003 and the communication device 1004 into the storage device 1002, and executes various processes in accordance with the programs. The programs used are those that cause a computer to execute at least some of the operations described in the above-described embodiments. For example, the control unit 140 of the base station 10 shown in FIG. 29 may be implemented by a control program stored in the storage device 1002 and executed by the processor 1001. Furthermore, for example, the control unit 240 of the terminal 20 shown in FIG. 30 may be implemented by a control program stored in the storage device 1002 and executed by the processor 1001. While the above-described various processes have been described as being executed by one processor 1001, they may also be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. The programs may be transmitted from a network via a telecommunications line.

[0180] The storage device 1002 is a computer-readable recording medium and may be configured, for example, by at least one of a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a random access memory (RAM), etc. The storage device 1002 may also be called a register, a cache, a main memory, etc. The storage device 1002 can store executable programs (program codes), software modules, etc. for implementing a communication method according to an embodiment of the present disclosure.

[0181] The secondary storage device 1003 is a computer-readable recording medium, and may be, for example, at least one of an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disk, a digital versatile disk, a Blu-ray disc), a smart card, a flash memory (e.g., a card, a stick, a key drive), a floppy disk, a magnetic strip, etc. The above-mentioned storage medium may be, for example, a database, a server, or other suitable medium including at least one of the storage device 1002 and the secondary storage device 1003.

[0182] The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, or a communication module. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, a transmission / reception antenna, an amplifier unit, a transmission / reception unit, a transmission path interface, etc. may be realized by the communication device 1004. The transmission / reception unit may be implemented as a transmission unit and a reception unit that are physically or logically separated.

[0183] The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives input from the outside. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that performs output to the outside. Note that the input device 1005 and the output device 1006 may be integrated into one device (for example, a touch panel).

[0184] Furthermore, each device such as the processor 1001 and the storage device 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between each device.

[0185] Furthermore, base station 10 and terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized by the hardware. For example, processor 1001 may be implemented using at least one of these pieces of hardware.

[0186] (Summary of the embodiment) As described above, according to an embodiment of the present invention, there is provided a communication device that communicates with a third communication device, the third communication device having a transmitting unit that transmits a connection request to a first communication device, a receiving unit that receives a connection permission from the first communication device, and a control unit that establishes a first connection with the first communication device, wherein the control unit controls communication of a second communication device and communicates with the second communication device, and the second communication device has a transmitting unit that transmits a connection request to the first communication device, a receiving unit that receives a connection permission from the first communication device, and a control unit that establishes a first connection with the first communication device.

[0187] With the above configuration, a connection can be established between a C-AP and a device controlling the C-AP, and communication of a UE in a target PLMN can be performed via multiple C-APs. That is, network redundancy can be ensured in the wireless communication system.

[0188] The control unit may share information with the third communication device. With this configuration, the C-AP can share information with other C-APs and determine a C-AP to connect to with a terminal based on the information.

[0189] The control unit may determine the third communication device with which the second communication device will communicate based on the shared information. With this configuration, a C-AP can share information with other C-APs and determine a C-AP to connect to with a terminal based on the information.

[0190] The controller may communicate the same or different information with the third communication device to the second communication device using the same or different radio resources as the third communication device. With this configuration, the C-AP can communicate with the UE together with other C-APs.

[0191] The control unit may execute control related to changing the connection destination of the second communication device based on information received from the third communication device or the second communication device. With this configuration, the C-AP can execute handover to transition the main C-AP.

[0192] In addition, according to an embodiment of the present invention, a communication method is provided in which a communication device executes a transmission procedure for transmitting a connection request to a first communication device, a reception procedure for receiving a connection permission from the first communication device, a control procedure for establishing a first connection with the first communication device, and a procedure for controlling communication of a second communication device and communicating with the second communication device, and the second communication device has a transmission unit for transmitting a connection request to the first communication device, a reception unit for receiving a connection permission from the first communication device, and a control unit for establishing a first connection with the first communication device.

[0193] With the above configuration, a connection can be established between a C-AP and a device controlling the C-AP, and communication of a UE in a target PLMN can be performed via multiple C-APs. That is, network redundancy can be ensured in the wireless communication system.

[0194] (Supplementary explanation of the embodiment) Although the embodiments of the present invention have been described above, the disclosed invention is not limited to such embodiments, and those skilled in the art will understand various modifications, alterations, alternatives, and substitutions. While specific numerical examples have been used to facilitate understanding of the invention, unless otherwise specified, these numerical values ​​are merely examples, and any appropriate values ​​may be used. The division of items in the above description is not essential to the present invention; two or more items may be combined as needed, and items described in one item may apply to items described in another item (unless inconsistent). The boundaries between functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries between physical components. The operations of multiple functional units may be performed by a single physical component, or the operations of a single functional unit may be performed by multiple physical components. The order of the processing steps described in the embodiments may be reversed as long as there is no contradiction. For convenience of processing description, the base station 10 and terminal 20 have been described using functional block diagrams. However, such devices may be implemented using hardware, software, or a combination thereof. The software operated by the processor of the base station 10 in accordance with an embodiment of the present invention and the software operated by the processor of the terminal 20 in accordance with an embodiment of the present invention may each be stored in random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, registers, hard disk (HDD), removable disk, CD-ROM, database, server or any other suitable storage medium.

[0195] Furthermore, the notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information may be performed by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB)), other signals, or a combination thereof. Furthermore, the RRC signaling may be referred to as an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like.

[0196] Each aspect / embodiment described in the present disclosure may be applied to at least one of systems using LTE (Long Term Evolution), LTE-Advanced (LTE-A), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), FRA (Future Radio Access), NR (New Radio), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark), IEEE 802.20, UWB (Ultra-Wideband), Bluetooth (registered trademark), or other appropriate systems, and next-generation systems extended based on these. Furthermore, a combination of multiple systems (e.g., a combination of at least one of LTE and LTE-A with 5G, etc.) may also be applied.

[0197] The order of the procedures, sequences, flowcharts, etc. of each aspect / embodiment described herein may be changed unless it is consistent. For example, the methods described in this disclosure present elements of various steps using an example order and are not limited to the particular order presented.

[0198] In this specification, a specific operation that is described as being performed by the base station 10 may also be performed by its upper node in some cases. In a network consisting of one or more network nodes having the base station 10, it is clear that various operations performed for communication with the terminal 20 may be performed by at least one of the base station 10 and another network node other than the base station 10 (such as, but not limited to, an MME or an S-GW). Although the above example illustrates a case where there is one other network node other than the base station 10, the other network node may be a combination of multiple other network nodes (such as an MME and an S-GW).

[0199] The information or signals described in the present disclosure may be output from a higher layer (or a lower layer) to a lower layer (or a higher layer), or may be input / output via multiple network nodes.

[0200] Input and output information may be stored in a specific location (for example, memory) or may be managed using a management table. Input and output information may be overwritten, updated, or added to. Output information may be deleted. Input information may be sent to another device.

[0201] In the present disclosure, the determination may be made based on a value represented by one bit (0 or 1), a Boolean value (true or false), or a numerical comparison (e.g., comparison with a predetermined value).

[0202] Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0203] Software, instructions, information, etc. may also be transmitted or received over a transmission medium. For example, if software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave), then these wired and / or wireless technologies are included within the definition of transmission media.

[0204] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0205] Note that terms explained in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may be a signal (signaling). Furthermore, a signal may be a message. Furthermore, a component carrier (CC) may be called a carrier frequency, a cell, a frequency carrier, etc.

[0206] As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0207] Furthermore, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values ​​from a predetermined value, or may be expressed using other corresponding information. For example, a radio resource may be indicated by an index.

[0208] The names used for the above-described parameters are not intended to be limiting in any way. Furthermore, the mathematical expressions using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (e.g., PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not intended to be limiting in any way.

[0209] In this disclosure, terms such as "base station (BS)," "radio base station," "base station," "fixed station," "NodeB," "eNodeB (eNB)," "gNodeB (gNB)," "access point," "transmission point," "reception point," "transmission / reception point," "cell," "sector," "cell group," "carrier," and "component carrier" may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.

[0210] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can be provided with communication service by a base station subsystem (e.g., a small indoor base station (RRH: Remote Radio Head)). The term "cell" or "sector" refers to a part or the entire coverage area of ​​a base station and / or base station subsystem that provides communication service within this coverage.

[0211] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0212] A mobile station may also be referred to by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.

[0213] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, etc. At least one of the base station and the mobile station may be a device mounted on a mobile body, or the mobile body itself. The mobile body may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile body (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station may also include devices that do not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

[0214] Furthermore, a base station in the present disclosure may be read as a user terminal. For example, the aspects / embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between a plurality of terminals 20 (which may be called, for example, D2D (Device-to-Device) or V2X (Vehicle-to-Everything)). In this case, the terminal 20 may be configured to have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (for example, "side"). For example, terms such as an uplink channel and a downlink channel may be read as a side channel.

[0215] Similarly, the user terminal in the present disclosure may be read as a base station, in which case the base station may be configured to have the functions of the user terminal described above.

[0216] As used in this disclosure, the terms "determining" and "determining" may encompass a wide variety of actions. "Determining" and "determining" may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiring (e.g., searching in a table, database, or other data structure), ascertaining, and the like. "Determining" and "determining" may also include receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), and the like. Furthermore, "judgment" and "decision" can include regarding resolving, selecting, choosing, establishing, comparing, etc. as having been "judged" or "decided." In other words, "judgment" and "decision" can include regarding some action as having been "judged" or "decided." Furthermore, "judgment (decision)" can be interpreted as "assuming," "expecting," "considering," etc.

[0217] The terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access." As used in this disclosure, two elements may be considered to be "connected" or "coupled" to each other using one or more wires, cables, and / or printed electrical connections, as well as electromagnetic energy having wavelengths in the radio frequency range, microwave range, and optical (both visible and invisible) range, as some non-limiting and non-exhaustive examples.

[0218] The reference signal may be abbreviated as RS (Reference Signal) or may be called a pilot depending on the applicable standard.

[0219] As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

[0220] As used in this disclosure, any reference to an element using a designation such as "first," "second," etc. does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must in some way precede the second element.

[0221] The "means" in the configuration of each of the above devices may be replaced with "part," "circuit," "device," etc.

[0222] When used in this disclosure, the terms "include," "including," and variations thereof are intended to be inclusive, similar to the term "comprising." Furthermore, when used in this disclosure, the term "or" is not intended to be an exclusive or.

[0223] A radio frame may be composed of one or more frames in the time domain. Each of the one or more frames in the time domain may be called a subframe. A subframe may further be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0224] Numerology may be communication parameters that apply to at least one of transmission and reception of a signal or channel, such as subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, specific filtering operations performed by the transceiver in the frequency domain, and specific windowing operations performed by the transceiver in the time domain.

[0225] A slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol) in the time domain. A slot may be a time unit based on numerology.

[0226] A slot may include multiple minislots. Each minislot may consist of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (or PUSCH) mapping type B.

[0227] The radio frame, subframe, slot, minislot, and symbol all represent time units for transmitting signals, and may be referred to by other names corresponding to the radio frame, subframe, slot, minislot, and symbol.

[0228] For example, one subframe may be called a transmission time interval (TTI), multiple consecutive subframes may be called a TTI, or one slot or one minislot may be called a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc. instead of a subframe.

[0229] Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate wireless resources (such as frequency bandwidth and transmission power that can be used by each terminal 20) to each terminal 20 in TTI units. Note that the definition of TTI is not limited to this.

[0230] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., the number of symbols) to which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.

[0231] When one slot or one minislot is called a TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit for scheduling. Also, the number of slots (minislots) constituting the minimum time unit for scheduling may be controlled.

[0232] A TTI having a time length of 1 ms may be called a regular TTI (TTI in LTE Rel. 8-12), normal TTI, long TTI, regular subframe, normal subframe, long subframe, slot, etc. A TTI shorter than a regular TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.

[0233] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.

[0234] A resource block (RB) is a resource allocation unit in the time domain and frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of numerology, for example, 12. The number of subcarriers included in an RB may also be determined based on numerology.

[0235] The time domain of an RB may include one or more symbols and may have a length of one slot, one minislot, one subframe, or one TTI. One TTI, one subframe, etc. may each be composed of one or more resource blocks.

[0236] Note that one or more RBs may also be called a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, or the like.

[0237] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0238] A Bandwidth Part (BWP) (which may also be referred to as a fractional bandwidth) may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by their index relative to a common reference point of the carrier. PRBs may be defined in a given BWP and numbered within that BWP.

[0239] The BWP may include a BWP for UL (UL BWP) and a BWP for DL ​​(DL BWP). One or more BWPs may be set for the terminal 20 within one carrier.

[0240] At least one of the configured BWPs may be active, and the terminal 20 may not expect to transmit or receive a predetermined signal / channel outside the active BWP. Note that the terms "cell," "carrier," and the like in this disclosure may be read as "BWP."

[0241] The above-described structures of radio frames, subframes, slots, minislots, symbols, etc. are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, etc. may be changed in various ways.

[0242] In this disclosure, where articles are added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0243] In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "coupled" may also be interpreted in the same way as "different."

[0244] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched depending on the implementation. Furthermore, notification of predetermined information (e.g., notification that "X is true") is not limited to being done explicitly, but may be done implicitly (e.g., by not notifying the predetermined information).

[0245] In the present disclosure, the device 10B is an example of a first communication device, the terminal 20 is an example of a second communication device, and the device 10A is an example of a third communication device.

[0246] Although the present disclosure has been described in detail above, it is clear to those skilled in the art that the present disclosure is not limited to the embodiments described herein. The present disclosure can be implemented in modified and altered forms without departing from the spirit and scope of the present disclosure as defined by the claims. Therefore, the description of the present disclosure is intended to be illustrative and does not have any limiting meaning on the present disclosure. [Explanation of symbols]

[0247] 10 base station 110 Transmitter 120 Receiver 130 Setting section 140 Control Unit 20 terminals 210 Transmitter 220 Receiving unit 230 Setting Section 240 Control Unit 30 Core Network 1001 processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication equipment 1005 Input Device 1006 Output Device

Claims

1. a first transmitting unit that transmits a connection request to the first communication device; a first receiving unit that receives a connection permission from the first communication device; a first control unit that establishes a first connection with the first communication device; the first control unit controls communication of a second communication device and communicates with the second communication device; the second communication device communicates with a third communication device having a second transmitting unit that transmits a connection request to the first communication device, a second receiving unit that receives a connection permission from the first communication device, and a second control unit that establishes the first connection with the first communication device; the first control unit shares information with the third communication device; the first control unit determines the third communication device with which the second communication device will communicate based on the shared information; A communication device in which the first transmitting unit transmits the same data as that transmitted from the third communication device to the second communication device in the same frequency band as that used for communication between the third communication device and the second communication device.

2. The communication device according to claim 1 , wherein the first control unit communicates the same or different information as that of the third communication device with the second communication device using the same or different radio resources as that of the third communication device.

3. The communication device according to claim 2 , wherein the first control unit executes control relating to a change of a connection destination of the second communication device based on information received from the third communication device or the second communication device.

4. a sending step of sending a connection request to the first communication device; a receiving step of receiving a connection permission from the first communication device; a control procedure for establishing a first connection with the first communication device; a communication device executing a procedure for controlling communication of a second communication device and communicating with the second communication device; a communication method for communicating with a third communication device, the second communication device transmitting a connection request to the first communication device, receiving a connection permission from the first communication device, and establishing a first connection with the first communication device, the method comprising: sharing information with the third communication device; determining the third communication device with which the second communication device will communicate based on the shared information; A communication method in which the communication device further executes a procedure of transmitting the same data as that transmitted by the third communication device to the second communication device in the same frequency band as that used for communication between the third communication device and the second communication device.

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