Terminal and communication method

Abstract

A terminal has a reception unit that receives first system information from a base station, and a control unit that acquires, from the first system information, a first list, a second list, and a third list for scheduling second system information other than the first system information, and decides a start position of a window for acquiring the second system information based on the first list, the second list, and the third list, the reception unit receiving the second system information from the base station in the window.

Description

TECHNICAL FIELD

[0001] The present application relates to a terminal in a wireless communication system and a communication method. BACKGROUND

[0002] In NR (New Radio) (also referred to as "5G") which is a subsequent system of LTE (Long Term Evolution), a terminal acquires system information (SI) broadcasted from a base station, for example, a frequency band and a bandwidth used in downlink or uplink, and the like are set. Further, when a cell connection prohibition is not in the system information, the terminal can camp on in the cell (for example, Non-Patent Literature 1).

[0003] PRIOR ART DOCUMENT

[0004] NON-PATENT LITERATURE

[0005] Non-Patent Literature 1: 3GPP TS 36.331 V15.10.0 (2020-07) SUMMARY

[0006] PROBLEMS TO BE SOLVED BY THE INVENTION

[0007] The scheduling of system information is performed by SIB1 (System Information Block Type 1). For example, in a case where system information for function enhancement or the like is extended, the scheduling method needs to be specified so that the terminal can correctly acquire the system information.

[0008] The present application is made in view of the above, and aims to schedule the extended system information.

[0009] MEANS FOR SOLVING THE PROBLEMS

[0010] According to the disclosed technology, a terminal is provided with a reception unit that receives first system information from a base station, and a control unit that acquires a first list, a second list, and a third list for scheduling second system information other than the first system information from the first system information, and decides a start position of a window for acquiring the second system information based on the first list, the second list, and the third list, the reception unit receiving the second system information from the base station in the window.

[0011] EFFECT OF THE INVENTION

[0012] According to the disclosed technology, it is possible to schedule the extended system information. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 FIG. 1 is a diagram showing an example of a structure of a wireless communication system in an embodiment of the present application.

[0014] Figure 2 FIG. 2 is a diagram showing another example of a structure of a wireless communication system in an embodiment of the present application.

[0015] Figure 3 FIG. 3 is a timing chart for explaining an example of system information acquisition in an embodiment of the present application.

[0016] Figure 4 FIG. 4 is a diagram showing an example (1) of a specification change in an embodiment of the present application.

[0017] Figure 5 FIG. 5 is a diagram showing an example (2) of a specification change in an embodiment of the present application.

[0018] Figure 6 FIG. 6 is a flowchart for explaining an example (1) of system information acquisition in an embodiment of the present application.

[0019] Figure 7 FIG. 7 is a diagram showing an example (3) of a specification change in an embodiment of the present application.

[0020] Figure 8 FIG. 8 is a flowchart for explaining an example (2) of system information acquisition in an embodiment of the present application.

[0021] Figure 9 FIG. 9 is a diagram showing an example (4) of a specification change in an embodiment of the present application.

[0022] Figure 10 FIG. 10 is a diagram showing an example of a functional structure of the base station 10 in an embodiment of the present application.

[0023] Figure 11 FIG. 11 is a diagram showing an example of a functional structure of the terminal 20 in an embodiment of the present application.

[0024] Figure 12 FIG. 12 is a diagram showing an example of a hardware structure of the base station 10 or the terminal 20 in an embodiment of the present application. DETAILED DESCRIPTION

[0025] Hereinafter, an embodiment of the present application will be described with reference to the accompanying drawings. Note that the following embodiment is an example, and the application of the embodiment of the present application is not limited to the following embodiment.

[0026] In the operation of the wireless communication system of the embodiments of the present application, the existing technology is appropriately used. Among them, the existing technology is, for example, the existing LTE, but is not limited to the existing LTE. Furthermore, the term "LTE" used in this specification is set to have a broad meaning including LTE-Advanced and beyond LTE-Advanced (example: NR) as long as there is no special description.

[0027] Furthermore, in the embodiments of the present application described below, the terms SS (Synchronization signal), PSS (Primary SS), SSS (Secondary SS), PBCH (Physical broadcast channel), PRACH (Physical random access channel), PDCCH (Physical Downlink Control Channel), PDSCH (Physical Downlink Shared Channel), PUCCH (Physical Uplink Control Channel), PUSCH (Physical Uplink Shared Channel), and the like, which are used in the existing LTE, are used. This is for the convenience of description, and the same signals, functions, and the like can also be referred to by other names. Furthermore, the above-described terms in NR correspond to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH, NR-PDCCH, NR-PDSCH, NR-PUCCH, NR-PUSCH, and the like. However, even the signals used in NR are not necessarily written as "NR-".

[0028] Furthermore, in the embodiments of the present application, the Duplex method can be either a TDD (Time Division Duplex) method or an FDD (Frequency Division Duplex) method, or can be a method other than these (for example, Flexible Duplex, and the like).

[0029] Further, in the embodiment of the present application, the so-called wireless parameters and the like are "configured" or "specified" in such a manner that a value specific to the wireless parameters and the like is pre-configured, a value notified from the base station 10 or the terminal 20 is configured to the wireless parameters, or a value is pre-configured to the wireless parameters and the like by a specification.

[0030] Figure 1 is a diagram showing an example of a configuration of a wireless communication system in the embodiment of the present application. As shown in Figure 1 , the base station 10 and the terminal 20 are included. In Figure 1 , one base station 10 and one terminal 20 are shown, however, this is an example, and a plurality of each of them can be present. In addition, the terminal 20 can be referred to as a "user device" or "UE (User Equipment)", and the like.

[0031] The base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20. A physical resource of a wireless signal is defined by a time domain and a frequency domain, and the time domain can be defined by an OFDM (Orthogonal Frequency Division Multiplexing) symbol, and the frequency domain can be defined by a sub-band domain, a sub-carrier, or a resource block.

[0032] As shown in Figure 1 , the base station 10 transmits a control signal or data to the terminal 20 through a DL (Downlink), and receives a control signal or data from the terminal 20 through a UL (Uplink). The base station 10 and the terminal 20 can each perform beamforming to transmit and receive a signal. Further, the base station 10 and the terminal 20 can each apply MIMO (Multiple Input Multiple Output) based communication to the DL or the UL. Further, the base station 10 and the terminal 20 can each perform communication via a PCell (Primary Cell) and an SCell (Secondary Cell) based on CA (Carrier Aggregation).

[0033] The terminal 20 is, for example, a smartphone, a portable telephone, a tablet, a wearable terminal, a communication module for M2M (Machine-to-Machine), or the like, and is a communication device having a wireless communication function. As shown in Figure 1As shown, the terminal 20 receives a control signal or data from the base station 10 through the DL and transmits a control signal or data to the base station 10 through the UL, thereby utilizing various communication services provided by the wireless communication system.

[0034] Figure 2 is a diagram showing a structure example (2) of a wireless communication system in the embodiment of the present application. Figure 2 shows a structure example of a wireless communication system in a case where NR-DC (NR-Dual connectivity) is performed. As shown, the base station 10A serving as an MN (Master Node) and the base station 10B serving as an SN (Secondary Node) are provided. The base station 10A and the base station 10B are connected to the core network 30, respectively. The terminal 20 as a UE communicates with both the base station 10A and the base station 10B. Note that a wireless communication system based on EN-DC (E-UTRA NR DC) in which the MN is an LTE base station and the SN is an NR base station can also be configured. Figure 2

[0035] A cell group provided through the base station 10A as the MN is referred to as an MCG (Master Cell Group), and a cell group provided through the base station 10B as the SN is referred to as an SCG (Secondary Cell Group). As to the operation described later, both a network structure in which the base station 10A and the base station 10B operate in a dual connectivity manner and a network structure in which the base station 10A and the base station 10B operate in an independent manner can be assumed. Figure 2 Figure 1

[0036] Figure 3 is a timing chart for explaining an example of system information acquisition in the embodiment of the present application. In step S1, the terminal 20 receives system information (SI, System Information) from the base station 10 via a cell. For example, the system information can include a MIB (Master Information Block) and a SIB1 (System Information Block Type 1 or System Information Block 1). The MIB is system information transmitted in the PBCH. The SIB1 can include information related to whether access to the cell is permitted, scheduling of other system information, radio resource configuration common to UEs, access barring, and the like.

[0037] ​​​In step S2, the terminal 20 performs setting of communication parameters based on the acquired system information. For example, a frequency band and a bandwidth used in downlink or uplink are set. When the cell is not connection prohibited in the system information, the terminal 20 can also camp on the cell.

[0038] As needed, the terminal 20 and the base station 10 can also perform a random access procedure as shown in step S3. For example, the terminal 20 can also transmit uplink using the communication parameters set based on the system information in step S2. When the random access procedure ends, the terminal 20 and the base station 10 can perform normal communication.

[0039] Figure 4 is a diagram showing an example (1) of specification changes in the embodiment of the present application. As shown in Figure 4 , a new system information "SystemInformationBlockType1-v15xy-IEs" is defined as a part of SIB1. The set SI is scheduled by "schedulingInfoList-v15xy".

[0040] As shown in Figure 4 , one of the following parameters by "si-Periodicity-r15" can be set as the period of system information: rf8 indicating 8 radio frames of 10 ms, rf16 indicating 16 radio frames, rf32 indicating 32 radio frames, rf64 indicating 64 radio frames, rf128 indicating 128 radio frames, rf256 indicating 256 radio frames, and rf512 indicating 512 radio frames.

[0041] As shown in Figure 4 , "SIB-Type-v15xy" indicating the scheduled SIB can set SIB19, SIB20, SIB21, SIB24, SIB25, SIB26, and the like as system information.

[0042] Figure 5 is a diagram showing an example (2) of specification changes in the embodiment of the present application. As shown in Figure 5 , system information from SIB3 to SIB18 can also be scheduled by "schedulingInfoList". SIB19 and later system information can also be scheduled by "schedulingInfoList-v15xy". Further, as shown in Figure 5 , "schedulingInfoList-v15xy" can also be specified not to schedule the same SIB as "schedulingInfoList".

[0043] Figure 6 is a flowchart for explaining an example (1) of system information acquisition in the embodiment of the present application. In step Sll, the terminal 20 starts processing of deciding a start position of an SI window for receiving an SI message that is an acquisition object. Next, in step S12, the terminal 20 determines whether or not the SI message that is the acquisition object is included in one of "schedulinglnfoList", "schedulinglnfoList-vl5xy", or "pos-schedulinglnfoList". When the SI message that is the acquisition object is included in one of the above information elements (YES in S12), the processing proceeds to step S13, and when the SI message that is the acquisition object is not included in any of the above information elements (NO in S12), the flow ends.

[0044] In addition, in step S12, an element in which "si-posOffset" is not set can be further added to the condition. In a case where "si-posOffset" is enabled, system information is scheduled by "pos-schedulinglnfoList" with an offset of 8 radio frames, as compared to system information scheduled by "schedulinglnfoList". In addition, "pos-schedulinglnfoList" is system information related to position information, such as including GNSS (Global Navigation Satellite System)-oriented assistance data and the like.

[0045] In step S13, the terminal 20 decides a number n corresponding to an entry position of the SI message that is the acquisition object, in a list of SI messages linked in the order of "schedulinglnfoList", "schedulinglnfoList-vl5xy", and "pos-schedulinglnfoList".

[0046] Next, in step S14, the terminal 20 sets w as si-WindowLength indicating the length of the SI window, and decides a value x as (n-1)*w. For example, si-WindowLength can also be set to 1 ms, 2 ms, 5 ms, 10 ms, 15 ms, 20 ms, or 40 ms.

[0047] Next, in step S15, the terminal 20 sets T to si-Periodicity indicating the period of the SI, and sets a subframe #a that becomes a = x mod 10 in a radio frame that becomes SFN mod T = FLOOR(x / 10) to the start position of the SI window. For example, one of the following parameters of si-Periodicity can be set to the period of the system information: rf8 indicating 8 radio frames of 10 ms, rf16 indicating 16 radio frames, rf32 indicating 32 radio frames, rf64 indicating 64 radio frames, rf128 indicating 128 radio frames, rf256 indicating 256 radio frames, and rf512 indicating 512 radio frames.

[0048] Figure 7 is a diagram indicating Example (3) of the norm change in the embodiment of the present application. Figure 7 is an example of the norm change corresponding to the flowchart of Figure 6 As shown in Figure 7 , the terminal 20 can also determine the number n corresponding to the input position of the SI message that is the object of acquisition in the list of SI messages linked in the order of "schedulingInfoList", "schedulingInfoList-v15xy", and "pos-schedulingInfoList".

[0049] Figure 8 is a flowchart for explaining Example (2) of the system information acquisition in the embodiment of the present application. In step S21, the terminal 20 starts processing of determining the start position of the SI window for receiving the SI message that is the object of acquisition. Next, in step S22, the terminal 20 determines whether the SI message that is the object of acquisition is included in one of "schedulingInfoList", "schedulingInfoList-v15xy", or "pos-schedulingInfoList". When the SI message that is the object of acquisition is included in one of the above information elements (YES in S22), the processing proceeds to step S23, and when the SI message that is the object of acquisition is not included in any of the above information elements (NO in S22), the flow ends.

[0050] In addition, in step S22, an element for which "si-posOffset" is not set can also be added to the conditions. In the case where "si-posOffset" is enabled, the system information is scheduled by "pos-schedulingInfoList" with an offset of 8 radio frames, as compared to the system information scheduled by "schedulingInfoList".

[0051] In step S23, the terminal 20 decides the number n corresponding to the input position of the SI message that is the acquisition target, in the list of SI messages linked in the order of "schedulingInfoList", "pos-schedulingInfoList", and "schedulingInfoList-v15xy".

[0052] Next, in step S24, the terminal 20 sets w as si-WindowLength indicating the length of the SI window, and decides the value x as (n-1)*w.

[0053] Next, in step S25, the terminal 20 sets T as si-Periodicity indicating the period of the SI, and sets the subframe #a that is a=x mod 10, in the radio frame that is SFN mod T=FLOOR(x / 10), as the start position of the SI window.

[0054] Figure 9 is a drawing indicating an example (4) of the norm change in the embodiment of the present application. Figure 9 is an example of the norm change corresponding to the flowchart of Figure 8 Figure 9 As shown in the drawing, the terminal 20 can also decide the number n corresponding to the input position of the SI message that is the acquisition target, in the list of SI messages linked in the order of "schedulingInfoList", "pos-schedulingInfoList", and "schedulingInfoList-v15xy".

[0055] According to the above-described embodiment, the terminal 20 can reliably acquire the scheduled system information, in the case where the system information is extended.

[0056] That is, it is possible to schedule the extended system information.

[0057] (Functional structure)

[0058] ​Next, a functional configuration example of the base station 10 and the terminal 20 that execute the processes and operations explained so far will be explained. The base station 10 and the terminal 20 include functions for implementing the above-described embodiments. However, the base station 10 and the terminal 20 can also have only a part of the functions in the embodiments, respectively.

[0059] <BASE STATION 10>

[0060] Figure 10 is a diagram showing an example of a functional configuration of the base station 10 in the embodiment of the present application. As shown in Figure 10 , the base station 10 has a transmission unit 110, a reception unit 120, a setting unit 130, and a control unit 140. Figure 10 The functional configuration shown in the drawing is only an example. As long as the operations involved in the embodiment of the present application can be executed, the functional division and the names of the functional units can be arbitrary.

[0061] The transmission unit 110 has a function of generating a signal to be transmitted to the terminal 20 side and transmitting the signal by a wireless method. In addition, the transmission unit 110 transmits an inter-network node message to other network nodes. The reception unit 120 includes a function of receiving various signals transmitted from the terminal 20 and acquiring, for example, information of a higher layer from the received signals. In addition, the transmission unit 110 has a function of transmitting an NR-PSS, an NR-SSS, an NR-PBCH, a DL / UL control signal, a reference signal, and the like to the terminal 20. In addition, the reception unit 120 receives an inter-network node message from other network nodes. The transmission unit 110 and the reception unit 120 can be combined and provided as a communication unit.

[0062] The setting unit 130 stores setting information that is set in advance and various setting information transmitted to the terminal 20 to a storage device and reads out from the storage device as necessary. The content of the setting information is, for example, system information and the like.

[0063] As explained in the embodiments, the control unit 140 performs control involved in broadcasting of system information. In addition, the control unit 140 performs control involved in random access. It can be that the functional units in the control unit 140 related to signal transmission are included in the transmission unit 110 and the functional units in the control unit 140 related to signal reception are included in the reception unit 120.

[0064] <TERMINAL 20>

[0065] Figure 11 is a diagram showing an example of a functional configuration of the terminal 20 in the embodiment of the present application. As shown in Figure 11 , the terminal 20 has a transmission unit 210, a reception unit 220, a setting unit 230, and a control unit 240.Figure 11 The functional configuration shown is merely an example. The functional divisions and the names of the functional units can be arbitrary as long as the operations involved in the embodiments of the present application can be performed.

[0066] The transmission unit 210 has a function of creating a transmission signal from transmission data and transmitting the transmission signal wirelessly. The reception unit 220 receives various signals wirelessly and acquires signals of higher layers from the received physical layer signals. Further, the reception unit 220 has a function of receiving an NR-PSS, an NR-SSS, an NR-PBCH, a DL / UL / SL control signal, and the like transmitted from the base station 10. Further, for example, as D2D communication, the transmission unit 210 transmits a PSCCH (Physical Sidelink Control Channel), a PSSCH (Physical Sidelink Shared Channel), a PSDCH (Physical Sidelink Discovery Channel), a PSBCH (Physical Sidelink Broadcast Channel), and the like to other terminals 20, and the reception unit 220 receives a PSCCH, a PSSCH, a PSDCH, or a PSBCH, and the like from other terminals 20. The transmission unit 210 and the reception unit 220 can be combined to be a communication unit.

[0067] The setting unit 230 stores various setting information received from the base station 10 or the terminal 20 by the reception unit 220 to a storage device and reads out from the storage device as necessary. Further, the setting unit 230 also stores setting information set in advance. The content of the setting information is, for example, system information and the like.

[0068] As explained in the embodiments, the control unit 240 performs control involved in acquisition of system information. Further, the control unit 240 performs control involved in random access. It can be that a functional unit related to signal transmission in the control unit 240 is included in the transmission unit 210 and a functional unit related to signal reception in the control unit 240 is included in the reception unit 220.

[0069] (Hardware configuration)

[0070] The block diagram used in the explanation of the above-described embodiments Figure 10 and Figure 11) shows a block of a functional unit. These functional blocks (structural units) are realized by any combination of at least one of hardware and software. Furthermore, the method of realizing each functional block is not particularly limited. That is, each functional block can be realized by one device which is physically or logically integrated, or by two or more devices which are physically or logically separated and connected directly or indirectly (for example, by wire, wireless, or the like). Each functional block can also be realized by combining one device or a plurality of devices with software.

[0071] Among the functions, there are judgment, decision, determination, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuration, reconfiguration, allocation, mapping, assigning, and the like, but are not limited to these. For example, a functional block (structural unit) which realizes a transmission function is called a transmitting unit, a transmitter. Any one is as described above, and the method of realization is not particularly limited.

[0072] For example, the base station 10, the terminal 20, and the like in one embodiment of the present disclosure can also function as a computer which performs processing of the wireless communication method of the present disclosure. Figure 12 is a diagram showing an example of a hardware structure of the base station 10 and the terminal 20 related to one embodiment of the present disclosure. The above-described base station 10 and terminal 20 can also be physically configured as a computer device including a processor 1001, a storage 1002, an auxiliary storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.

[0073] In addition, in the following description, the term "device" can be replaced with circuit, equipment, unit, and the like. The hardware structure of the base station 10 and the terminal 20 can be configured to include one or a plurality of each device shown in the diagram, or can be configured not to include a part of the devices.

[0074] As for each function in the base station 10 and the terminal 20, at least one of the reading of a specific software (program) into the processor 1001, the storage 1002, and the like, the operation and control by the processor 1001 based on the communication device 1004, or the reading and writing of data in the storage 1002 and the auxiliary storage 1003 is implemented.

[0075] The processor 1001 causes, for example, an operating system to operate to control the entire computer. The processor 1001 can also be constituted by a central processing device (Central Processing Unit: CPU) including an interface with a peripheral device, a control device, an arithmetic device, a register, and the like. For example, the control unit 140, the control unit 240, and the like described above can also be implemented by the processor 1001.

[0076] Further, the processor 1001 reads a program (program code), a software module, or data, and the like from at least one of the auxiliary storage 1003 and the communication device 1004 to the storage 1002, and performs various processing according to them. As the program, a program that causes a computer to perform at least a part of the operations described in the above-described embodiments can be used. For example, Figure 10 The control unit 140 of the base station 10 illustrated can also be implemented by a control program stored in the storage 1002 and operated in the processor 1001. Further, for example, Figure 11 The control unit 240 of the terminal 20 illustrated can also be implemented by a control program stored in the storage 1002 and operated in the processor 1001. It is described that the above-described various processing is performed by one processor 1001, but can also be performed by two or more processors 1001 simultaneously or sequentially. The processor 1001 can also be mounted by one or more chips. In addition, the program can also be transmitted from a network via an electric communication line.

[0077] The storage 1002 is a computer-readable recording medium, and can also be constituted by at least one of a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically EPROM), a RAM (Random Access Memory), and the like. The storage 1002 can also be referred to as a register, a cache, a main storage (main storage device), and the like. The storage 1002 can hold a program (program code), a software module, and the like that can be executed in order to implement the communication method related to one embodiment of the present disclosure.

[0078] The auxiliary storage device 1003 is a computer-readable recording medium such as at least one of an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disc, a magneto-optical disk (e.g., a compact disc, a digital versatile disc, a Blu-ray (registered trademark) disc), an intelligent card, a flash memory (e.g., a card, a stick, a key drive), a floppy (registered trademark) disc, a magnetic strip, or the like. The above-described recording medium can also be, for example, a database, a server, or another appropriate medium that includes at least one of the storage device 1002 and the auxiliary storage device 1003.

[0079] The communication device 1004 is hardware (a transceiver device) for performing communication between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, a network controller, a network card, a communication module, or the like. The communication device 1004 can also be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, or the like in order to implement at least one of, for example, frequency division duplex (FDD) and time division duplex (TDD). For example, a transceiver antenna, an amplifier unit, a transceiver unit, a transmission path interface, or the like can also be implemented by the communication device 1004. The transceiver unit can also be physically or logically separated and installed by a transmission unit and a reception unit.

[0080] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, or the like) that receives an input from the outside. The output device 1006 is an output device (e.g., a display, a speaker, an LED lamp, or the like) that performs output to the outside. In addition, the input device 1005 and the output device 1006 can also be a structure that is integrated (e.g., a touch panel).

[0081] Furthermore, the processor 1001, the storage device 1002, and the like are connected by a bus 1007 for communicating information. The bus 1007 can be configured using a single bus, or different buses can be used between the devices.

[0082] Furthermore, the base station 10 and the terminal 20 can also be configured to include a microprocessor, a digital signal processor (DSP), an ASIC (application specific integrated circuit), a PLD (programmable logic device), an FPGA (field programmable gate array), and the like hardware, and a part or all of the functional blocks can also be implemented by the hardware. For example, the processor 1001 can also be installed with at least one of these hardware.

[0083] (SUMMARY OF EMBODIMENTS)

[0084] As explained above, according to the embodiment of the present application, there is provided a terminal having: a reception unit that receives first system information from a base station; and a control unit that acquires, from the first system information, a first list, a second list, and a third list for scheduling second system information other than the first system information, and decides a start position of a window for acquiring the second system information based on the first list, the second list, and the third list, the reception unit receiving the second system information from the base station in the window.

[0085] With the above structure, the terminal 20 can reliably acquire the scheduled system information even if the system information is extended. That is, the extended system information can be scheduled.

[0086] It can also be that the second list schedules the extended system information, and does not schedule the system information scheduled by the first list, and the third list schedules the system information related to the position information. With this structure, the terminal 20 can reliably acquire the scheduled system information even if the new system information including the position information is extended.

[0087] It can also be that the control unit decides the start position of the window for acquiring the second system information based on the position of the second system information in the list linked in the order of the first list, the second list, and the third list. With this structure, the terminal 20 can reliably acquire the scheduled system information even if the new system information including the position information is extended.

[0088] It can also be that the control unit decides the start position of the window for acquiring the second system information based on the position of the second system information in a list that is linked in the order of the first list, the third list, and the second list. With this structure, the terminal 20 can reliably acquire the scheduled system information even when the new system information including the position information is expanded.

[0089] Further, according to an embodiment of the present application, there is provided a communication method in which the following steps are performed by a terminal:

[0090] a step of receiving first system information from a base station; a step of acquiring, from the first system information, a first list, a second list, and a third list for scheduling second system information other than the first system information, and deciding a start position of a window for acquiring the second system information based on the first list, the second list, and the third list; and a step of receiving the second system information from the base station in the window.

[0091] With the above structure, the terminal 20 can reliably acquire the scheduled system information even when the system information is expanded. That is, the expanded system information can be scheduled.

[0092] (Supplement to Embodiments)

[0093] The above describes the embodiments of the present application, but the disclosed application is not limited to such embodiments, and those skilled in the art will understand various modifications, corrections, alternatives, substitutions, and the like. To facilitate understanding of the application, specific numerical examples are used for description, but unless otherwise specified, these numerical values are only examples, and any appropriate value can be used. The division of items in the above description is not essential in the present application, and two or more items can be combined as needed, or an item can be applied to another item (as long as there is no contradiction). The boundaries of functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries of physical components. The operations of multiple functional units can be physically performed by one component, or the operations of one functional unit can be physically performed by multiple components. As for the processing procedures described in the embodiments, the order of the processes can be changed as long as there is no contradiction. To facilitate processing of the description, the base station 10 and the terminal 20 are described using a functional block diagram, but such devices can also be implemented by hardware, software, or a combination thereof. The software operated by the processor of the base station 10 according to the embodiments of the present application and the software operated by the processor of the terminal 20 according to the embodiments of the present application can be stored in a random access memory (RAM), a flash memory, a read only memory (ROM), an EPROM, an EEPROM, a register, a hard disk (HDD), a removable disk, a CD-ROM, a database, a server, and any other appropriate storage medium, respectively.

[0094] Further, the notification of the information is not limited to the manners / embodiments explained in the present disclosure, and can be performed by other methods. For example, the notification of the information can also be performed by physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), higher layer signaling (e.g., RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or a combination thereof. Further, the RRC signaling can also be referred to as an RRC message, and for example, can be an RRC connection setup message, an RRC connection reconfiguration message, or the like.

[0095] The manners / embodiments explained in the present disclosure can also be applied to at least one of LTE (Long Term Evolution), LTE-A (LTE-Advanced), 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), systems using other appropriate systems, and next-generation systems extended based thereon. Further, a plurality of systems can also be combined (e.g., at least one of LTE and LTE-A and 5G, and the like) and applied.

[0096] The order of processing, sequence, flowchart, and the like of each of the modes / embodiments described in this specification can be changed as long as there is no contradiction. For example, for the method described in this disclosure, the elements of various steps are prompted using an exemplary order, but are not limited to the specific order prompted.

[0097] In this specification, the specific operation performed by the base station 10 is sometimes performed by an upper node thereof according to the situation. In a network constituted by one or a plurality of network nodes having the base station 10, various operations performed for communication with the terminal 20 can be obviously performed by at least one of the base station 10 and other network nodes (for example, consider an MME or an S-GW, but not limited to these) other than the base station 10. In the above, the case where the other network node is one is exemplified, but the other network node can also be a combination of a plurality of other network nodes (for example, an MME and an S-GW).

[0098] The information or the like described in this disclosure can be output from a higher layer (or a lower layer) to a lower layer (or an upper layer). It can be input and output via a plurality of network nodes.

[0099] The information and the like input and output can be saved in a specific site (for example, a memory), and can be managed with a management table. The information and the like input and output can be overwritten, updated, or added. The information and the like output can be deleted. The information and the like input can be transmitted to another device.

[0100] The determination in this disclosure can be performed by a value represented by one bit (0 or 1), can be performed by a true / false value (Boolean: true or false), and can be performed by comparison of numerical values (for example, comparison with a specific value).

[0101] Software, regardless of the terminology used, such as software, firmware, middleware, microcode, hardware description language, or otherwise, should be interpreted broadly to encompass instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc.

[0102] Furthermore, software, instructions, information, etc. can also be transmitted as desired or required using transmission media. For example, in a case where software is transmitted from a website, a server, or other remote source using at least one of wired technologies (coaxial cables, optical cables, twisted pair cables, Digital Subscriber Line (DSL), etc.) and wireless technologies (infrared rays, microwaves, etc.), at least one of these wired technologies and wireless technologies is included in the definition of transmission media.

[0103] Information, signals, etc. explained in the present disclosure can also be represented using one of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. mentioned throughout the above description can be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0104] In addition, terms explained in the present disclosure and terms necessary for understanding the present disclosure can also be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol can also be a signal (signaling). Furthermore, a signal can also be a message. Furthermore, a Component Carrier (CC) can also be referred to as a carrier frequency, a cell, a frequency carrier, etc.

[0105] The terms "system" and "network" used in the present disclosure are used interchangeably.

[0106] Furthermore, information, parameters, and the like explained in the present disclosure can be expressed by an absolute value, a relative value with respect to a specific value, and can also be expressed by corresponding other information. For example, a radio resource can also be indicated by an index.

[0107] The names used for the above-described parameters are not limiting names in all respects. Furthermore, sometimes mathematical expressions and the like of these parameters are used differently from those explicitly disclosed in the present disclosure. Various channels (for example, PUCCH, PDCCH, and the like) and information elements can be identified by all appropriate names, and thus various names assigned to these various channels and information elements are not limiting names in all respects.

[0108] In the present disclosure, the terms "base station (BS)", "wireless base station", "base station device", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", "access point", "transmission point", "reception point", "transmission / reception point", "cell", "sector", "cell group", "carrier", "component carrier", and the like can be used interchangeably. There are also cases where the base station is referred to by the terms macro cell, small cell, femto cell, pico cell, and the like.

[0109] A base station can accommodate one or a plurality of (for example, three) cells. In the case where the base station accommodates a plurality of cells, the coverage area of the base station as a whole can be divided into a plurality of smaller areas, and each of the smaller areas can also be provided with a communication service by a base station subsystem (for example, a small base station for indoor use (Remote Radio Head (RRH))). The term "cell" or "sector" refers to a part or the whole of the coverage area of at least one of the base station and the base station subsystem that provides a communication service in that coverage.

[0110] In the present disclosure, the terms "mobile station (MS)", "user terminal", "user device (UE)", "terminal", and the like can be used interchangeably.

[0111] There also exist mobile stations which are referred to as subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless terminals, remote terminals, handsets, user agents, mobile clients, clients, or a variety of other appropriate terms by those of skill in the art.

[0112] At least one of the base station and the mobile station can also be referred to as a transmitting apparatus, a receiving apparatus, a communication apparatus, or the like. In addition, at least one of the base station and the mobile station can also be a device mounted on a mobile body, a mobile body itself, or the like. The mobile body can be a vehicle (for example, an automobile, an airplane, or the like), can also be a mobile body that moves in an unmanned manner (for example, a drone, an automated driving vehicle, or the like), and can also be a robot (manned or unmanned). In addition, at least one of the base station and the mobile station also includes an apparatus that does not necessarily move when a communication operation is performed. For example, at least one of the base station and the mobile station can also be an IoT (Internet of Things) device such as a sensor.

[0113] Furthermore, the base station in the present disclosure can also be replaced with a user terminal. For example, for a structure in which communication between the base station and the user terminal is replaced with communication between a plurality of terminals 20 (for example, can also be referred to as D2D (Device-to-Device), V2X (Vehicle-to-Everything), or the like), each of the modes / embodiments of the present disclosure can also be applied. In this case, a structure in which the terminal 20 has the functions of the base station 10 described above can also be provided. Furthermore, the terms such as "uplink" and "downlink" can also be replaced with terms corresponding to inter-terminal communication (for example, "side"). For example, the uplink channel, the downlink channel, or the like can also be replaced with a side channel.

[0114] Likewise, the user terminal in the present disclosure can also be replaced with a base station. In this case, a structure in which the base station has the functions of the user terminal described above can also be provided.

[0115] The terms "determining" and "deciding" as used in this disclosure encompass a wide variety of actions. For example, "determining" or "deciding" can include "determining" or "deciding" that a judgment, calculation, computation, processing, derivation, investigation, search (e.g., a search of a table, a database, or another data structure), ascertainment, or the like, has been made. Also, "determining" or "deciding" can include "determining" or "deciding" that a reception (e.g., of information), a transmission (e.g., of information), an input, an output, an access (e.g., to data in a memory), or the like, has been made. Further, "determining" or "deciding" can include "determining" or "deciding" that a resolution, a selection, a choice, an establishment, a comparison, or the like, has been made. That is, "determining" or "deciding" can include "determining" or "deciding" that some action has been made. Also, "determining" or "deciding" can be replaced with "assuming," "expecting," "considering," or the like.

[0116] The terms "connected" and "coupled" as used in this disclosure, or any variants thereof, are intended to mean all of the following unless otherwise indicated: directly connected to or coupled to; indirectly connected to or coupled to by way of one or more elements; and any combinations thereof. The coupling or connection between the elements can be physical, logical, or a combination thereof. For example, "connected" can be replaced with "accessed." As used in this disclosure, two elements are "connected" or "coupled" to each other when at least one of the following is true: at least one electrical wire, cable, and printed electric connection is used; and as a few non-limiting and non-exclusive examples, electromagnetic energy having wavelengths in the radio, microwave, and optical (both visible and invisible) regions is used.

[0117] The reference signal can also be referred to as RS (Reference Signal) and can also be referred to as a pilot depending on the applied standard.

[0118] The description "based on" used in the present disclosure does not mean "only based on" unless specifically written. In other words, the description "based on" means both "only based on" and "at least based on".

[0119] Any reference to elements using the terms "first", "second", and the like used in the present disclosure does not completely limit the number or order of the elements. The terms can be used in the present disclosure as a convenient method of distinguishing between two or more elements. Therefore, a reference to first and second elements does not mean that only two elements are applicable or that the first element must be prior to the second element in some form.

[0120] The "unit", "circuit", "device", and the like can be substituted for the "component" in the configuration of each of the above-described apparatuses.

[0121] In the present disclosure, the terms "include", "including", and the like used in the present disclosure mean the same as the term "comprising" and are inclusive. Further, the term "or" used in the present disclosure does not mean the exclusive or.

[0122] A radio frame can also be composed of one or more slots in the time domain. Each of the one or more slots can also be referred to as a subframe. Further, a subframe can also be composed of one or more slots in the time domain. The subframe can also be a fixed length of time (e.g., 1 ms) independent of numerology.

[0123] The numerology can also be a communication parameter applied in at least one of transmission and reception of a certain signal or channel. For example, the numerology can also mean at least one of a subcarrier spacing (SCS), a bandwidth, a symbol length, a cyclic prefix length, a transmission time interval (TTI), a number of symbols per TTI, a radio frame structure, a specific filtering processing performed by a transmitter-receiver in the frequency domain, a specific windowing processing performed by the transmitter-receiver in the time domain, and the like.

[0124] A slot can also be composed of one or a plurality of symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, and the like) in the time domain. A slot can also be a time unit based on a numerology.

[0125] A slot can also include a plurality of mini-slots. Each mini-slot can also be composed of one or a plurality of symbols in the time domain. Further, a mini-slot can also be referred to as a sub-slot. A mini-slot can also be composed of a smaller number of symbols than a slot. A PDSCH (or PUSCH) transmitted in a larger time unit than a mini-slot can also be referred to as PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot can also be referred to as PDSCH (or PUSCH) mapping type B.

[0126] A radio frame, a subframe, a slot, a mini-slot, and a symbol each represent a time unit for transmitting a signal. A radio frame, a subframe, a slot, a mini-slot, and a symbol can also be referred to by other names.

[0127] For example, one subframe can also be referred to as a transmission time interval (TTI), a plurality of consecutive subframes can also be referred to as a TTI, one slot or one mini-slot can also be referred to as a TTI. That is, at least one of a subframe and a TTI can be a subframe (1 ms) in the existing LTE, can be a period shorter than 1 ms (for example, 1-13 symbols), or can be a period longer than 1 ms. In addition, a unit representing a TTI can not be referred to as a subframe, but can be referred to as a slot, a mini-slot, or the like.

[0128] Here, a TTI, for example, refers to a minimum time unit of scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling in which a radio resource (a frequency bandwidth, a transmission power, and the like that can be used in each terminal 20) is allocated to each terminal 20 in a TTI unit. In addition, the definition of a TTI is not limited thereto.

[0129] A TTI can also be a transmission time unit of a data packet (a transport block), a code block, a codeword, or the like that has been channel-encoded, and can also become a processing unit of scheduling, link adaptation, or the like. In addition, when a TTI is given, a time interval (for example, a number of symbols) to which a transport block, a code block, a codeword, or the like is actually mapped can be shorter than the TTI.

[0130] In addition, in a case where one slot or one mini-slot is referred to as a TTI, one or more TTIs (i.e., one or more slots or one or more mini-slots) can also be a minimum time unit of scheduling. Furthermore, the number of slots (mini-slots) constituting the minimum time unit of scheduling can also be controlled.

[0131] A TTI having a time length of 1 ms can also be referred to as a normal TTI (TTI in LTE Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, etc. A TTI shorter than the normal TTI can also be referred to as a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a mini-slot, a sub-slot, a slot, etc.

[0132] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) can also be replaced with a TTI having a time length longer than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) can also be replaced with a TTI having a TTI length shorter than the long TTI and a TTI length of 1 ms or more.

[0133] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and can also include one or more contiguous subcarriers (subcarriers) in the frequency domain. The number of subcarriers included in the RB can also be the same regardless of the numerology, for example, can also be 12. The number of subcarriers included in the RB can also be determined based on the numerology.

[0134] Furthermore, the time domain of the RB can also include one or more symbols, and can also be the length of one slot, one mini-slot, one subframe, or one TTI. One TTI, one subframe, etc. can also be constituted by one or more resource blocks, respectively.

[0135] In addition, one or more RBs can also be referred to as a physical resource block (PRB), a subcarrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0136] Furthermore, a resource block can also be constituted by one or more resource elements (REs). For example, one RE can also be a wireless resource area of one subcarrier and one symbol.

[0137] A bandwidth part (BWP) (may also be referred to as a partial bandwidth, etc.) can also indicate a subset of contiguous common RBs (common resource blocks) for a certain numerology in a certain carrier. Here, the common RBs can also be determined by the index of the RBs from a common reference point of the carrier. The PRB can also be defined in a certain BWP and additionally numbered within the BWP.

[0138] A BWP for UL (UL BWP) and a BWP for DL (DL BWP) can also be included in the BWP. For a UE, one or more BWPs can also be configured within one carrier.

[0139] At least one of the configured BWPs can also be activated, and the UE can not be assumed to transmit and receive a specific signal / channel outside the activated BWP. In addition, "cell", "carrier", etc. in the present disclosure can also be replaced with "BWP".

[0140] The above-described structures of radio frames, subframes, slots, mini-slots, and symbols, etc. are merely examples. For example, the number of subframes included in a radio frame, the number of slots of each subframe or radio frame, the number of mini-slots included in a slot, the number of symbols and RBs included in a slot or a mini-slot, the number of subcarriers included in an RB, and the number of symbols in a TTI, symbol length, cyclic prefix (CP) length, etc. can be variously changed.

[0141] In the present disclosure, for example, in the case where an article is added by a definite article such as "a", "an", and "the" in English, the present disclosure can also include a case where the article added after the definite article is plural.

[0142] In the present disclosure, the term "A is different from B" can also mean "A and B are different from each other". In addition, the term can also mean "A and B are different from C, respectively". The terms "separate", "combine", etc. can also be interpreted in the same manner as "different".

[0143] Each of the modes / embodiments described in the present disclosure can be used alone or in combination, and can also be used in switching as execution proceeds. Furthermore, the notification of a specific information (for example, the notification of "X") is not limited to the notification in an explicit manner, but can also be performed in an implicit manner (for example, without the notification of the specific information).

[0144] In addition, in the present disclosure, SIB1 is an example of first system information. As an example of SI message which is an acquisition object is second system information. "schedulingInfoList" is an example of first list. "schedulingInfoList-v15xy" is an example of second list. "pos-schedulingInfoList" is an example of third list.

[0145] The above has been described in detail with respect to the present disclosure, but the present disclosure is obviously not limited to the embodiments described in the present disclosure for those skilled in the art. The present disclosure can be implemented as a modification and a change without departing from the spirit and scope of the present disclosure determined based on the recitations of the claims. Therefore, the recitations of the present disclosure are for the purpose of illustrative explanation and do not have any limiting meaning on the present disclosure.

[0146] This international patent application claims priority based on Japanese Patent Application No. 2020-137665 filed on August 17, 2020, the entire contents of Japanese Patent Application No. 2020-137665 are incorporated herein by reference.

[0147] Symbol explanation

[0148] 10 base station

[0149] 110 transmission unit

[0150] 120 reception unit

[0151] 130 setting unit

[0152] 140 control unit

[0153] 20 terminal

[0154] 210 transmission unit

[0155] 220 reception unit

[0156] 230 setting unit

[0157] 240 control unit

[0158] 30 core network

[0159] 1001 processor

[0160] 1002 storage device

[0161] 1003 auxiliary storage device

[0162] 1004 communication device

[0163] 1005 input device

[0164] 1006 output device.

Claims

1. A terminal, comprising: The receiving unit receives first system information from the base station; and The control unit obtains a first list, a second list, and a third list from the first system information for scheduling second system information other than the first system information, and determines the starting position of the window for obtaining the second system information based on the position of the second system information in the list that links the first list, the second list, and the third list. The receiving unit receives the second system information from the base station in the window. The second list schedules expanded system information, but does not schedule system information scheduled by the first list. The third list schedules system information related to location information.

2. A base station, The system is configured to include, in addition to the first system information, second system information, and a first list, a second list, and a third list that notify the starting position of the window for the terminal to receive the second system information, within the first system information. The base station has a transmitting unit that sends the first system information to the terminal. The sending unit sends the second system information to the terminal. The starting position is determined based on the position of the second system information in the list that connects the first list, the second list, and the third list. The second list schedules expanded system information, but does not schedule system information scheduled by the first list. The third list schedules system information related to location information.

3. A wireless communication system comprising a base station and a terminal, The base station is configured to include second system information other than the first system information, and a first list, a second list, and a third list that notify the starting positions of windows for terminals to receive the second system information, in the first system information. The base station has a transmitting unit that sends the first system information to the terminal. The starting position is determined based on the position of the second system information in the list that connects the first list, the second list, and the third list. The sending unit sends the second system information to the terminal. The terminal has: The receiving unit receives the first system information from the base station; and The control unit obtains the first list, the second list, and the third list from the first system information, and determines the starting position of the window used to obtain the second system information based on the first list, the second list, and the third list. The receiving unit receives the second system information from the base station in the window. The second list schedules expanded system information, but does not schedule system information scheduled by the first list. The third list schedules system information related to location information.

4. A communication method in which a terminal performs the following steps: The steps for receiving first system information from the base station; The control steps involve obtaining a first list, a second list, and a third list from the first system information for scheduling second system information other than the first system information, and determining the starting position of the window for obtaining the second system information based on the position of the second system information in the list linking the first list, the second list, and the third list; and The step of receiving the second system information from the base station in the window. The second list schedules expanded system information, but does not schedule system information scheduled by the first list. The third list schedules system information related to location information.

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