Terminal, base station, and communication method

Abstract

The 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 determines a start position of a window for acquiring the second system information based on the second list and the third list, the reception unit receiving the second system information from the base station within the window.

Description

Technical Field

[0001] This invention relates to terminals, base stations, and communication methods in wireless communication systems. Background Technology

[0002] In LTE (Long Term Evolution) and NR (New Radio) (also known as "5G"), which is a successor to LTE, the terminal obtains system information (SI) broadcast from the base station and is configured with, for example, the frequency band and bandwidth to be used in the downlink or uplink. Furthermore, if the cell in the system is not blocked from connection, the terminal can camp on that cell (e.g., Non-Patent Document 1).

[0003] Existing technical documents

[0004] Non-patent literature

[0005] Non-patent literature 1: 3GPP TS 36.331V15.10.0 (2020-07) Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] System information scheduling is performed through SIB1 (System Information Block Type 1). For example, when system information used for feature enhancement is expanded, a scheduling method needs to be specified so that the terminal can accurately obtain the system information.

[0008] The present invention was made in view of the above points, and its purpose is to schedule the extended system information.

[0009] Methods for solving problems

[0010] According to the disclosed technology, a terminal is provided, comprising: a receiving unit for receiving first system information from a base station; and a control unit for 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, based on the second list and the third list, the starting position of a window for obtaining the second system information, wherein the receiving unit receives the second system information from the base station within the window.

[0011] Invention Effects

[0012] Based on publicly available technology, it is possible to schedule extended system information. Attached Figure Description

[0013] Figure 1 This is a diagram illustrating a structural example (1) of a wireless communication system according to an embodiment of the present invention.

[0014] Figure 2 This is a diagram illustrating a structural example (2) of a wireless communication system in an embodiment of the present invention.

[0015] Figure 3 This is a timing diagram illustrating an example of system information acquisition in an embodiment of the present invention.

[0016] Figure 4 This is a diagram illustrating an example (1) of a specification change in an embodiment of the present invention.

[0017] Figure 5 This is a diagram illustrating an example (2) of a specification change in an embodiment of the present invention.

[0018] Figure 6 This is a flowchart illustrating an example (1) of obtaining system information in an embodiment of the present invention.

[0019] Figure 7 This is a diagram illustrating an example (3) of a specification change in an embodiment of the present invention.

[0020] Figure 8 This is a flowchart illustrating an example (2) of obtaining system information in an embodiment of the present invention.

[0021] Figure 9 This is a diagram illustrating an example (4) of a specification change in an embodiment of the present invention.

[0022] Figure 10 This is a diagram illustrating an example (5) of a specification change in an embodiment of the present invention.

[0023] Figure 11 This is a diagram illustrating an example (6) of a specification change in an embodiment of the present invention.

[0024] Figure 12 This is a flowchart illustrating an example (3) of obtaining system information in an embodiment of the present invention.

[0025] Figure 13 This is a diagram illustrating an example (7) of a specification change in an embodiment of the present invention.

[0026] Figure 14 This is a diagram illustrating an example (8) of a specification change in an embodiment of the present invention.

[0027] Figure 15 This is a diagram illustrating an example (9) of a specification change in an embodiment of the present invention.

[0028] Figure 16This is a flowchart illustrating an example (4) of system information acquisition in an embodiment of the present invention.

[0029] Figure 17 This is a diagram illustrating an example (10) of a specification change in an embodiment of the present invention.

[0030] Figure 18 This is a diagram illustrating an example of the functional structure of base station 10 in an embodiment of the present invention.

[0031] Figure 19 This is a diagram illustrating an example of the functional structure of terminal 20 in an embodiment of the present invention.

[0032] Figure 20 This is a diagram illustrating an example of the hardware structure of a base station 10 or a terminal 20 in an embodiment of the present invention. Detailed Implementation

[0033] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Furthermore, the embodiments described below are examples, and the application of the present invention is not limited to the following embodiments.

[0034] In the operation of the wireless communication system according to embodiments of the present invention, existing technology is appropriately used. This existing technology includes, for example, existing LTE, but is not limited to existing LTE. Furthermore, the term "LTE" as used in this specification is assumed to have a broad meaning, encompassing LTE-Advanced and subsequent modes (e.g., NR), unless otherwise specified.

[0035] Furthermore, in the embodiments of the present invention described below, terms such as 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), and PUSCH (Physical Uplink Shared Channel) used in existing LTE are used. This is for ease of description; the same signals, functions, etc., may also be referred to by other names. Furthermore, the aforementioned terms in NR correspond to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH, NR-PDCCH, NR-PDSCH, NR-PUCCH, NR-PUSCH, etc. However, even signals used in NR are not necessarily specified as "NR-".

[0036] Furthermore, in embodiments of the present invention, the duplex mode can be either TDD (Time Division Duplex) or FDD (Frequency Division Duplex) or other modes (e.g., Flexible Duplex).

[0037] Furthermore, in embodiments of the present invention, the term "configure" or "specify" for wireless parameters can mean that a specific value for the wireless parameters is pre-configured, a value notified from the base station 10 or the terminal 20 is set to the wireless parameters, or a value is pre-configured to the wireless parameters by a specification.

[0038] Figure 1 This is a diagram illustrating a structural example (1) of a wireless communication system according to an embodiment of the present invention. Figure 1 As shown, it includes a base station 10 and a terminal 20. Figure 1The image shows one base station 10 and one terminal 20, but this is just an example and there could be multiple terminals. Additionally, the terminal 20 can also be referred to as a "user equipment" or "UE (user equipment)".

[0039] Base station 10 is a communication device that provides one or more cells and communicates wirelessly with terminal 20. The physical resources of the wireless signal are defined in the time domain and frequency domain. The time domain can also be defined by OFDM (Orthogonal Frequency Division Multiplexing) symbols, and the frequency domain can also be defined by subbands, subcarriers, or resource blocks.

[0040] like Figure 1 As shown, base station 10 transmits control information or data to terminal 20 via DL (Downlink) and receives control information or data from terminal 20 via UL (Uplink). Both base station 10 and terminal 20 are capable of beamforming for signal transmission and reception. Furthermore, both base station 10 and terminal 20 can apply MIMO (Multiple Input Multiple Output) based communication to DL or UL. Additionally, both base station 10 and terminal 20 can communicate via CA (Carrier Aggregation) based SCell (Secondary Cell) and PCell (Primary Cell).

[0041] Terminal 20 is, for example, a communication device with wireless communication capabilities such as a smartphone, mobile phone, tablet, wearable terminal, or M2M (Machine-to-Machine) communication module. Figure 1 As shown, terminal 20 receives control information or data from base station 10 via DL, and sends the control information or data to base station 10 via UL, thereby utilizing various communication services provided by the wireless communication system.

[0042] Figure 2 This is a diagram illustrating a structural example (2) of a wireless communication system in an embodiment of the present invention. Figure 2 This illustrates an example of the architecture of a wireless communication system implementing NR-DC (NR-Dual connectivity). For example... Figure 2As shown, the system includes a base station 10A, which acts as the MN (Master Node), and a base station 10B, which acts as the SN (Secondary Node). Base stations 10A and 10B are connected to the core network 30. The terminal 20, acting as a UE, communicates with both base stations 10A and 10B. Alternatively, a wireless communication system based on MN as an LTE base station and SN as an NR base station, such as EN-DC (E-UTRA NR DC), can also be configured.

[0043] The cell group provided by base station 10A, acting as MN, is called MCG (Master Cell Group), and the cell group provided by base station 10B, acting as SN, is called SCG (Secondary Cell Group). The operations described later can be conceived as follows: Figure 2 A network structure operating in a dual-connection mode can also be conceived as... Figure 1 A network structure that operates independently.

[0044] Figure 3 This is a timing diagram illustrating an example of system information acquisition in an embodiment of the present invention. In step S1, terminal 20 receives system information (SI) from base station 10 via a cell. For example, the system information may also include a MIB (Master Information Block) and SIB1 (System Information Block Type 1 or System Information Block 1). The MIB is system information transmitted in the PBCH. SIB1 may also include information related to whether access to the cell is permitted, scheduling of other system information, UE common radio resource settings, access prohibition, etc.

[0045] In step S2, terminal 20 sets communication parameters based on the acquired system information. For example, the frequency band and bandwidth used in the downlink or uplink are set. Terminal 20 can also camp on a cell if the cell is not blocked from connection according to the system information.

[0046] If necessary, as shown in step S3, terminal 20 and base station 10 may perform a random access procedure. For example, terminal 20 may also apply the communication parameters set based on system information in step S2 to send an uplink. When the random access procedure ends, terminal 20 and base station 10 can perform normal communication.

[0047] Figure 4This is a diagram illustrating an example (1) of a specification change in an embodiment of the present invention. For example... Figure 4 As shown, the new system information "SystemInformationBlockType1-v15xy-IEs" can also be defined as part of SIB1. The configured SI is scheduled via "schedulingInfoList-v15xy".

[0048] like Figure 4 As shown, via "si-Periodicity-r15", one of the following can be set as the period of system information: rf8 for 8 radio frames of 10ms, rf16 for 16 radio frames, rf32 for 32 radio frames, rf64 for 64 radio frames, rf128 for 128 radio frames, rf256 for 256 radio frames, and rf512 for 512 radio frames.

[0049] like Figure 4 As shown, the "SIB-Type-v15xy" of the scheduled SIB can set SIB19, SIB20, SIB21, SIB24, SIB25, SIB26, etc. as system information.

[0050] Figure 5 This is a diagram illustrating example (2) of a specification change in an embodiment of the present invention. For example... Figure 5 As shown, system information from SIB3 to SIB18 can also be scheduled using "schedulingInfoList". System information from SIB19 onwards can also be scheduled using "schedulingInfoList-v15xy". Furthermore, as... Figure 5 As shown, “schedulingInfoList-v15xy” can also be specified as not scheduling the same SIB as “schedulingInfoList”.

[0051] Figure 6This is a flowchart illustrating an example (1) of system information acquisition in an embodiment of the present invention. In step S11, terminal 20 begins processing to determine the starting position of the SI window for receiving the SI message to be acquired. In the next step S12, terminal 20 determines whether the SI message to be acquired is included in any one of “schedulingInfoList”, “schedulingInfoList-v15xy”, or “pos-schedulingInfoList”. If the SI message to be acquired is included in one of the above information elements (S12 "Yes"), proceed to step S13; if the SI message to be acquired is not included in any of the above information elements (S12 "No"), end the process.

[0052] Additionally, in step S12, the condition "si-posOffset" can be added: "si-posOffset" is not set. When "si-posOffset" is enabled, system information is scheduled via "pos-schedulingInfoList" with an offset of 8 radio frames, starting from the system information scheduled via "schedulingInfoList". Furthermore, "pos-schedulingInfoList" contains system information related to location information, such as auxiliary data for GNSS (Global Navigation Satellite System).

[0053] In step S13, terminal 20 determines the number n corresponding to the entry position of the SI message being acquired in the list of SI messages linked in the order of “schedulingInfoList”, “schedulingInfoList-v15xy”, and “pos-schedulingInfoList”.

[0054] In the next step S14, terminal 20 sets w to si-WindowLength, which represents the length of the SI window, and determines the value x as (n-1)*w. For example, si-WindowLength can also be set to 1ms, 2ms, 5ms, 10ms, 15ms, 20ms, or 40ms.

[0055] In the next step S15, terminal 20 sets T to si-Periodicity, which represents the period of SI, and it becomes subframe #a, which is a = x mod 10, within a radio frame of SFN mod T = FLOOR(x / 10), and sets it to the starting position of the SI window. For example, through si-Periodicity, one of the following parameters can be set as the period of system information: rf8 representing 8 radio frames of 10ms, rf16 representing 16 radio frames, rf32 representing 32 radio frames, rf64 representing 64 radio frames, rf128 representing 128 radio frames, rf256 representing 256 radio frames, and rf512 representing 512 radio frames.

[0056] Figure 7 This is a diagram illustrating an example (3) of a specification change in an embodiment of the present invention. Figure 7 Is with Figure 6 Examples of specification changes corresponding to the flowchart. For example... Figure 7 As shown, terminal 20 can also determine the number n corresponding to the entry position of the SI message to be acquired from the list of SI messages linked in the order of "schedulingInfoList", "schedulingInfoList-v15xy" and "pos-schedulingInfoList".

[0057] Figure 8 This is a flowchart illustrating an example (2) of system information acquisition in an embodiment of the present invention. In step S21, terminal 20 begins processing to determine the starting position of the SI window for receiving the SI message to be acquired. In the next step S22, terminal 20 determines whether the SI message to be acquired is included in one of “schedulingInfoList”, “schedulingInfoList-v15xy”, or “pos-schedulingInfoList”. If the SI message to be acquired is included in one of the above information elements (S22 "Yes"), the process proceeds to step S23; if the SI message to be acquired is not included in any of the above information elements (S22 "No"), the process ends.

[0058] Additionally, in step S22, the condition "si-posOffset" can be added: "si-posOffset" is not set. When "si-posOffset" is enabled, system information is scheduled via "pos-schedulingInfoList" with an offset of 8 radio frames, starting from the system information scheduled via "schedulingInfoList".

[0059] In step S23, terminal 20 determines the number n corresponding to the position of the entry in the list of SI messages that are to be acquired, which are linked in the order of “schedulingInfoList”, “pos-schedulingInfoList”, and “schedulingInfoList-v15xy”.

[0060] Next, in step S24, terminal 20 sets w to si-WindowLength, which represents the length of SI window, and determines the value x as (n-1)*w.

[0061] Next, in step S25, terminal 20 sets T to si-Periodicity, which represents the period of SI, and it becomes subframe #a, which is a = x mod 10, within the radio frame of SFNmod T = FLOOR(x / 10), and sets it to the starting position of the SI window.

[0062] Figure 9 This is a diagram illustrating an example (4) of a specification change in an embodiment of the present invention. Figure 9 Is with Figure 8 Examples of specification changes corresponding to the flowchart. Figure 9 As shown, terminal 20 can also determine the number n corresponding to the position of the entry in the list of SI messages that are being acquired, which are linked in the order of “schedulingInfoList”, “pos-schedulingInfoList”, and “schedulingInfoList-v15xy”.

[0063] Figure 10 This is a diagram illustrating an example (5) of a specification change in an embodiment of the present invention. For example... Figure 10 As shown, the new system information "SystemInformationBlockType1-v12xy-IEs" can also be defined as part of SIB1. The scheduled SI is configured via "schedulingInfoList-v12xy".

[0064] like Figure 10As shown, by using "si-periodicity-r12xy", one of the following can be set as the period of system information: rf8 for 8 10ms radio frames, rf16 for 16 radio frames, rf32 for 32 radio frames, rf64 for 64 radio frames, rf128 for 128 radio frames, rf256 for 256 radio frames, and rf512 for 512 radio frames.

[0065] like Figure 10 As shown, the "SIB-Type-v12xy" of the scheduled SIB can set SIB19, SIB20, SIB21, SIB24, SIB25, SIB26, SIB27, SIB28, SIB29 and other information to the system.

[0066] Figure 11 This is a diagram illustrating an example (6) of a specification change in an embodiment of the present invention. For example... Figure 11 As shown, the number of entries in "schedulingInfoList-v12xy" is set to exceed the number of entries in "schedulingInfoList". The first entry in "schedulingInfoList-v12xy" corresponds to the first entry in "schedulingInfoList". The second entry in "schedulingInfoList-v12xy" corresponds to the second entry in "schedulingInfoList".

[0067] That is, the entries set in "schedulingInfoList-v12xy" correspond to the entries set in "schedulingInfoList" in the order they are set. If the number of entries in "schedulingInfoList" exceeds the number of entries set in "schedulingInfoList", the entries in "schedulingInfoList-v12xy" are not associated with "schedulingInfoList", and the additional SI messages are scheduled.

[0068] like Figure 11 As shown, "sib-MappingInfo" refers to messages other than SI messages set at the beginning of "schedulingInfoList" and contains at least one SIB entry.

[0069] like Figure 11As shown, regarding "si-periodicity" and "posSI-periodicity", when the corresponding SI message is scheduled through "schedulingInfoList", "si-periodicity-v12xy" can also be left unset.

[0070] Figure 12 This is a flowchart illustrating an example (3) of obtaining system information in an embodiment of the present invention.

[0071] In step S31, terminal 20 begins processing to determine the starting position of the SI window used to receive the SI message as the acquisition target. In the next step S32, terminal 20 determines whether "schedulingInfoList-v12xy" is included in "SystemInformationBlockType1". If it is included ("Yes" in S32), proceed to step S33; if it is not included ("No" in S33), proceed to step S34.

[0072] In step S33, terminal 20 determines the number n corresponding to the position of the entry in the list of SI messages that are the target of acquisition, which are concatenated in the order of “schedulingInfoList-v12xy” and “pos-schedulingInfoList”.

[0073] On the other hand, in step S34, the terminal 20 determines the number n corresponding to the position of the entry in the list of SI messages that are the target of acquisition, which are linked in the order of “schedulingInfoList” and “pos-schedulingInfoList”.

[0074] In step S35, terminal 20 uses w as si-WindowLength, which represents the length of the SI window, and determines the value x as (n-1)*w. For example, si-WindowLength can also be set to 1ms, 2ms, 5ms, 10ms, 15ms, 20ms, or 40ms.

[0075] In the next step S36, terminal 20 uses T as the si-Periodicity representing the period of SI, and sets the subframe #a, which is a = x mod 10, within the radio frame of SFN mod T = FLOOR(x / 10), as the starting position of the SI window. For example, through si-Periodicity, one of the following can be set as the period of system information: rf8 representing 8 radio frames of 10ms, rf16 representing 16 radio frames, rf32 representing 32 radio frames, rf64 representing 64 radio frames, rf128 representing 128 radio frames, rf256 representing 256 radio frames, and rf512 representing 512 radio frames.

[0076] Alternatively, step S33 can be performed only if "si-posOffset" is not set before step S32. When "si-posOffset" is valid, system information is scheduled via "pos-schedulingInfoList" with an offset of 8 radio frames, starting from the system information scheduled via "schedulingInfoList-v12xy". Furthermore, "pos-schedulingInfoList" contains system information related to location information, such as GNSS-oriented auxiliary data.

[0077] Figure 13 This is a diagram illustrating an example (7) of a specification change in an embodiment of the present invention. Figure 13 Is with Figure 12 Examples of specification changes corresponding to the flowchart. For example... Figure 13 As shown, terminal 20 can also determine the number n corresponding to the position of the entry in the list of SI messages that are concatenated in the order of "schedulingInfoList-v12xy" and "pos-schedulingInfoList" as the SI message to be acquired.

[0078] Figure 14 This is a diagram illustrating an example (8) of a specification change in an embodiment of the present invention. For example... Figure 14 As shown, the new system information "SystemInformationBlockType1-v12xy-IEs" can be defined as part of SIB1. The scheduled SIs are configured via "schedulingInfoList-v12xy" and "schedulingInfoList2-v12xy".

[0079] like Figure 14As shown, “schedulingInfoList-v12xy” contains “SchedulingInfo-v12xy”, and “SchedulingInfo-v12xy” contains “sib-MappingInfo-v12xy”.

[0080] like Figure 14 As shown, “schedulingInfoList2-v12xy” contains “SchedulingInfo2-r12”, and “SchedulingInfo2-r12” contains “si-Periodicity-r12” and “sib-MappingInfo-r12”.

[0081] like Figure 14 As shown, via "si-Periodicity-r12", one of the following can be set as the period of system information: rf8 for 8 10ms radio frames, rf16 for 16 radio frames, rf32 for 32 radio frames, rf64 for 64 radio frames, rf128 for 128 radio frames, rf256 for 256 radio frames, and rf512 for 512 radio frames.

[0082] like Figure 14 As shown, the "SIB-Type-v12xy" of the scheduled SIB can set SIB19, SIB20, SIB21, SIB24, SIB25, SIB26, SIB27, SIB28, SIB29, etc. for system information.

[0083] Figure 15 This is a diagram illustrating an example (9) of a specification change in an embodiment of the present invention. For example... Figure 15 As shown, the number of entries in "schedulingInfoList-v12xy" can be the same as the number of entries in "schedulingInfoList". The first entry in "schedulingInfoList-v12xy" corresponds to the first entry in "schedulingInfoList". The second entry in "schedulingInfoList-v12xy" corresponds to the second entry in "schedulingInfoList". That is, the entries set in "schedulingInfoList-v12xy" correspond to the entries set in "schedulingInfoList" in that order.

[0084] like Figure 15As shown, “schedulingInfoList2-v12xy” indicates additional scheduling information for SI messages. In this example, the sum of the number of entries in “schedulingInfoList2-v12xy” and the number of entries in “schedulingInfoList” cannot exceed the maximum number of SI messages.

[0085] like Figure 15 As shown, in this example, "sib-MappingInfo-v12xy" and "sib-MappingInfo-r12" cannot be set in the same SIB.

[0086] Figure 16 This is a flowchart illustrating an example (4) of system information acquisition in an embodiment of the present invention. In step S41, terminal 20 begins processing to determine the starting position of the SI window for receiving the SI message as the acquisition target. In the following step S42, terminal 20 determines whether "schedulingInfoList2" is included in "SystemInformationBlockType1". If it is included ("Yes" in S42), proceed to step S43; if it is not included ("No" in S42), proceed to step S44.

[0087] In step S43, terminal 20 determines the number n corresponding to the position of the entry in the list of SI messages that are combined in the order of “schedulingInfoList”, “schedulingInfoList2”, and “pos-schedulingInfoList”, with the SI message being acquired as the target message.

[0088] On the other hand, in step S44, the terminal 20 determines the number n corresponding to the position of the entry in the list of SI messages that are combined in the order of “schedulingInfoList” and “pos-schedulingInfoList” with the SI message that is to be acquired.

[0089] In step S45, terminal 20 uses w as si-WindowLength, which represents the length of the SI window, and determines the value x as (n-1)*w. For example, si-WindowLength can also be set to 1ms, 2ms, 5ms, 10ms, 15ms, 20ms, or 40ms.

[0090] In the next step S46, terminal 20 uses T as the si-Periodicity representing the period of SI, and sets the subframe #a, which is a = x mod 10, within the radio frame of SFN mod T = FLOOR(x / 10), as the starting position of the SI window. For example, through si-Periodicity, one of the following can be set as the period of system information: rf8 representing 8 radio frames of 10ms, rf16 representing 16 radio frames, rf32 representing 32 radio frames, rf64 representing 64 radio frames, rf128 representing 128 radio frames, rf256 representing 256 radio frames, and rf512 representing 512 radio frames.

[0091] Alternatively, step S43 can be performed only if "si-posOffset" is not set before step S42. When "si-posOffset" is valid, system information is scheduled via "pos-schedulingInfoList" with an offset of 8 radio frames, starting from the system information scheduled via "schedulingInfoList" and "schedulingInfoList2". Furthermore, "pos-schedulingInfoList" contains system information related to location information, such as GNSS-oriented auxiliary data.

[0092] Figure 17 This is a diagram illustrating an example (10) of a specification change in an embodiment of the present invention. Figure 17 Is with Figure 16 Examples of specification changes corresponding to the flowchart. For example... Figure 16 As shown, terminal 20 can also determine the number n corresponding to the position of the entry in the list of SI messages that are combined in the order of "schedulingInfoList", "schedulingInfoList2" and "pos-schedulingInfoList" with the SI message being acquired.

[0093] According to the above embodiments, terminal 20 can reliably obtain the scheduled system information even when the system information is expanded.

[0094] That is, it can schedule extended system information.

[0095] (Functional Structure)

[0096] Next, an example of the functional structure of the base station 10 and terminal 20 performing the processes and operations described so far will be explained. The base station 10 and terminal 20 include the functions for implementing the embodiments described above. However, it is also possible that the base station 10 and terminal 20 each possess only a portion of the functions described in the embodiments.

[0097] <Base Station 10>

[0098] Figure 18 This is a diagram illustrating an example of the functional structure of base station 10 in an embodiment of the present invention. (See diagram for example.) Figure 18 As shown, the base station 10 has a transmitting unit 110, a receiving unit 120, a setting unit 130, and a control unit 140. Figure 18 The functional structure shown is merely an example. The functional distinctions and names of the functional units can be arbitrary, as long as the operations involved in the embodiments of this invention can be performed.

[0099] The transmitting unit 110 has the following functions: generating a signal to be sent to the terminal 20 and transmitting the signal wirelessly. Furthermore, the transmitting unit 110 transmits inter-network node messages to other network nodes. The receiving unit 120 has the following functions: wirelessly receiving various signals transmitted from the terminal 20 and obtaining, for example, higher-level information from the received signals. Furthermore, the transmitting unit 110 has the function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL / UL control signals, and reference signals to the terminal 20. Furthermore, the receiving unit 120 receives inter-network node messages from other network nodes. The transmitting unit 110 and the receiving unit 120 can also be combined to form a communication unit.

[0100] The setting unit 130 stores pre-set setting information and various setting information sent to the terminal 20 into a storage device, and reads it from the storage device as needed. The content of the setting information includes, for example, system information.

[0101] As described in the embodiment, the control unit 140 performs control related to broadcasting system information. Furthermore, the control unit 140 performs control related to random access. Alternatively, the functional units related to signal transmission in the control unit 140 may be included in the transmitting unit 110, and the functional units related to signal reception in the control unit 140 may be included in the receiving unit 120.

[0102] Terminal 20

[0103] Figure 19 This is a diagram illustrating an example of the functional structure of terminal 20 in an embodiment of the present invention. (See diagram for example.) Figure 19As shown, terminal 20 has a sending unit 210, a receiving unit 220, a setting unit 230, and a control unit 240. Figure 19 The functional structure shown is merely an example. The functional distinctions and names of the functional units can be arbitrary, as long as the operations involved in the embodiments of this invention can be performed.

[0104] The transmitting unit 210 has the following functions: generating a transmission signal based on the transmission data and transmitting the transmission signal wirelessly. The receiving unit 220 wirelessly receives various signals and obtains higher-layer signals from the received physical layer signals. Furthermore, the receiving unit 220 has the function of receiving NR-PSS, NR-SSS, NR-PBCH, DL / UL / SL control signals, etc., transmitted from the base station 10. Additionally, for example, as D2D communication, the transmitting unit 210 transmits PSCCH (Physical Sidelink Control Channel), PSSCH (Physical Sidelink Shared Channel), PSDCH (Physical Sidelink Discovery Channel), PSBCH (Physical Sidelink Broadcast Channel), etc., to other terminals 20, and the receiving unit 220 receives PSCCH, PSSCH, PSDCH, or PSBCH from other terminals 20. Alternatively, the transmitting unit 210 and the receiving unit 220 can be combined to form a communication unit.

[0105] The setting unit 230 stores various setting information received from the base station 10 or the terminal 20 via the receiving unit 220 into a storage device, and reads it from the storage device as needed. In addition, the setting unit 230 also stores pre-set setting information. The content of the setting information includes, for example, system information.

[0106] As described in the embodiments, the control unit 240 performs control related to acquiring system information. Furthermore, the control unit 240 performs control related to random access. Alternatively, the functional units related to signal transmission in the control unit 240 may be included in the transmitting unit 210, and the functional units related to signal reception in the control unit 240 may be included in the receiving unit 220.

[0107] (Hardware Structure)

[0108] The block diagram used in the description of the above embodiments ( Figure 18 as well as Figure 19The diagram illustrates functional blocks. These functional blocks (structural units) are implemented through any combination of at least one of hardware and software. Furthermore, there are no particular limitations on the implementation method of each functional block. That is, each functional block can be implemented using a single device that is physically or logically combined, or by directly or indirectly (e.g., wired, wireless, etc.) connecting two or more physically or logically separate devices and implementing it using these multiple devices. A functional block can also be implemented by combining one or more of the aforementioned devices with software.

[0109] The functions include judgment, decision, determination, calculation, calculation, processing, derivation, investigation, search, confirmation, receiving, sending, output, access, resolution, selection, choosing, establishment, comparison, assumption, expectation, regard as, broadcasting, notifying, communicating, forwarding, structuring, reconfiguring, allocating, mapping, and assigning, but are not limited to these. For example, the functional block (structural unit) that implements the sending function is called a transmitting unit or transmitter. Each of these functions is as described above, and its implementation method is not particularly limited.

[0110] For example, in one embodiment of this disclosure, the base station 10, terminal 20, etc., can also function as a computer for processing the wireless communication method of this disclosure. Figure 20 This diagram illustrates an example of the hardware structure of a base station 10 and a terminal 20 according to one embodiment of this disclosure. The base station 10 and the terminal 20 described above may also 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.

[0111] Additionally, in the following description, the term "device" can be replaced with circuit, equipment, unit, etc. The hardware structure of base station 10 and terminal 20 can be configured to include one or more of the devices shown in the figure, or it can be configured not to include some of the devices.

[0112] Regarding the various functions in base station 10 and terminal 20, specific software (programs) are read into hardware such as processor 1001 and storage device 1002, so that processor 1001 performs calculations and controls communication based on communication device 1004, or controls at least one of reading and writing data in storage device 1002 and auxiliary storage device 1003, thereby achieving the following:

[0113] The processor 1001 enables the operating system to operate and control the computer as a whole. The processor 1001 may also be a central processing unit (CPU) that includes interfaces with peripheral devices, control devices, arithmetic units, registers, etc. For example, the control unit 140 and control unit 240 described above may also be implemented by the processor 1001.

[0114] Furthermore, the processor 1001 reads programs (program code), software modules, or data from at least one of the auxiliary storage device 1003 and the communication device 1004 into the storage device 1002, and performs various processes accordingly. As a program, a program that causes the computer to perform at least a portion of the operations described in the above embodiments can be used. For example, Figure 18 The control unit 140 of the base station 10 shown can also be implemented by a control program stored in the storage device 1002 and operated in the processor 1001. Furthermore, for example, Figure 19 The control unit 240 of the terminal 20 shown can also be implemented by a control program stored in the storage device 1002 and operated in the processor 1001. It has been explained that the various processes described above are executed by one processor 1001, but they can also be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 can also be implemented using more than one chip. Furthermore, the program can also be transmitted from a network via an electrical communication line.

[0115] Storage device 1002 is a computer-readable recording medium, and may be composed of at least one of ROM (Read-Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable Memory), RAM (Random Access Memory), etc. Storage device 1002 may also be referred to as a register, cache, main memory (main storage device), etc. Storage device 1002 is capable of storing executable programs (program code), software modules, etc., for implementing the communication method according to one embodiment of this disclosure.

[0116] The auxiliary storage device 1003 is a computer-readable recording medium, and may be composed of at least one of the following: CD-ROM (Compact Disc ROM) or other optical discs, hard disks, flexible discs, optical disks (e.g., compact discs, digital multifunction discs, Blu-ray discs), smart cards, flash memory (e.g., cards, sticks, key drives), floppy disks, magnetic stripes, etc. The aforementioned recording medium may also be, for example, a database, server, or other suitable medium that includes at least one of the storage device 1002 and the auxiliary storage device 1003.

[0117] The communication device 1004 is hardware (transmitting and receiving device) used for communication between computers via at least one of wired and wireless networks. It is also referred to as a network device, network controller, network interface card (NIC), communication module, etc. To implement at least one of, for example, Frequency Division Duplex (FDD) and Time Division Duplex (TDD), the communication device 1004 may also be configured to include a high-frequency switch, duplexer, filter, frequency synthesizer, etc. For example, transmitting and receiving antennas, amplifier units, transmitting and receiving units, transmission path interfaces, etc., can also be implemented by the communication device 1004. The transmitting and receiving units can also be physically or logically separated.

[0118] Input device 1005 is an input device that accepts input from external sources (e.g., keyboard, mouse, microphone, switch, button, sensor, etc.). Output device 1006 is an output device that performs output to external sources (e.g., display, speaker, LED light, etc.). Alternatively, input device 1005 and output device 1006 can also be an integrated structure (e.g., touch panel).

[0119] Furthermore, the processor 1001, storage device 1002, and other devices are connected via a bus 1007 for communicating information. The bus 1007 can be a single bus or different buses can be used between the devices.

[0120] Furthermore, the base station 10 and the terminal 20 can also be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), or a FPGA (Field Programmable Gate Array), and can also use this hardware to implement part or all of the functional blocks. For example, the processor 1001 can also be installed using at least one of these hardware components.

[0121] (Summary of implementation methods)

[0122] As described above, according to an embodiment of the present invention, a terminal is provided, comprising: a receiving unit for receiving first system information from a base station; and a control unit for 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, based on the second list and the third list, the starting position of a window for obtaining the second system information, wherein the receiving unit receives the second system information from the base station within the window.

[0123] With the above structure, terminal 20 can reliably obtain the scheduled system information even when the system information is expanded. That is, it can schedule the expanded system information.

[0124] Alternatively, the second list may consist of entries associated with system information scheduled through the first list, as well as entries for scheduling expanded system information. The third list may consist of entries for scheduling system information related to location information. The control unit determines the starting position of the window for obtaining the second system information based on the position of the second system information in the lists linked in the order of the second and third lists. With this structure, the terminal 20 can reliably obtain the scheduled system information even when new system information containing location information is expanded.

[0125] Alternatively, the second list may consist of entries that schedule the expanded system information, and the third list may consist of entries that schedule system information related to location information. The control unit determines the starting position of the window used to obtain the second system information based on the position of the second system information in the lists linked in the order of the first entry, the second list, and the third list. According to this structure, when new system information containing location information is expanded, the terminal 20 can reliably obtain the scheduled system information.

[0126] Furthermore, according to an embodiment of the present invention, a base station is provided, comprising: a control unit that includes a first list, a second list, and a third list for scheduling second system information other than first system information in the first system information, and determines the starting position of a window for transmitting the second system information based on the second list and the third list; and a transmission unit that transmits the first system information to a terminal and transmits the second system information to the terminal within the window.

[0127] With the above structure, terminal 20 can reliably obtain the scheduled system information even when the system information is expanded. That is, it can schedule the expanded system information.

[0128] Furthermore, according to an embodiment of the present invention, a communication method is provided in which a terminal performs: a receiving step of receiving first system information from a base station; a control step of obtaining a first list, a second list, and a third list of second system information other than the first system information from the first system information, and determining the starting position of a window for obtaining the second system information based on the second list and the third list; and a step of receiving the second system information from the base station within the window.

[0129] With the above structure, terminal 20 can reliably obtain the scheduled system information even when the system information is expanded. That is, it can schedule the expanded system information.

[0130] (Supplement to the implementation method)

[0131] The embodiments of the present invention have been described above. However, the disclosed invention is not limited to such embodiments, and those skilled in the art should understand various modifications, alterations, substitutions, and replacements. Specific numerical examples have been used to facilitate understanding of the invention, but unless otherwise specified, these values ​​are merely examples, and any appropriate values ​​may be used. The division of items in the above description is not essential in the present invention; two or more items can be combined as needed, and items described in one item can be applied to items described in other items (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 operation of multiple functional units can be physically performed by one component, or the operation of one functional unit can be physically performed by multiple components. Regarding the processing described in the embodiments, the order of processing can be changed as long as there is no contradiction. For ease of explanation, a functional block diagram is used to illustrate the base station 10 and terminal 20, but such a device can also be implemented by hardware, software, or a combination thereof. According to embodiments of the present invention, the software operated by the processor of the base station 10 and the software operated by the processor of the terminal 20 according to embodiments of the present invention can be stored in random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, CD-ROM, database, server and other suitable storage media, respectively.

[0132] Furthermore, the notification of information is not limited to the methods / implementations described in this disclosure, and can also be performed using other methods. For example, the notification of information can also be implemented through 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 combinations thereof. Additionally, RRC signaling can also be referred to as an RRC message, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc.

[0133] The various methods / implementations described in this 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 utilizing other suitable systems, and next-generation systems derived from them. In addition, multiple systems can be combined (e.g., a combination of LTE and at least one of LTE-A with 5G).

[0134] The processing procedures, timing, flowcharts, etc., of the various methods / implementations described in this specification may be rearranged as long as they do not contradict each other. For example, for the methods described in this disclosure, an exemplary order is used to indicate the elements of various steps, but the order in which they are indicated is not limited.

[0135] The specific operations described in this specification as being performed by base station 10 may also be performed by its upper node, depending on the circumstances. In a network consisting of one or more network nodes having base station 10, various operations performed for communication with terminal 20 can obviously be performed by at least one of base station 10 and other network nodes other than base station 10 (e.g., consider MME or S-GW, but are not limited to these). The above example illustrates the case where there is only one other network node besides base station 10, but other network nodes can also be a combination of multiple other network nodes (e.g., MME and S-GW).

[0136] Information or signals described in this disclosure can be output from a higher (or lower) layer to a lower (or higher) layer. They can also be input and output via multiple network nodes.

[0137] Input and output information can be stored in a specific location (such as memory) or managed using management tables. Input and output information can be overwritten, updated, or appended. Output information can also be deleted. Input information can also be sent to other devices.

[0138] The determination in this disclosure can be made by a value represented by 1 bit (0 or 1), or by a true or false value (Boolean: true or false), or by a comparison of values ​​(e.g., comparison with a specific value).

[0139] Whether it is called software, firmware, middleware, microcode, hardware description language, or any other name, software should be broadly interpreted as instructions, instruction sets, code, code segments, program code, program, subprogram, software module, application, software application, software package, routine, subroutine, object, executable file, execution thread, process, function, etc.

[0140] Furthermore, software, instructions, and information can also be sent and received via a transmission medium. For example, when software is sent from a website, server, or other remote source using at least one of wired technologies (coaxial cable, optical fiber, twisted pair, digital subscriber line (DSL), etc.) and wireless technologies (infrared, microwave, etc.), at least one of these wired and wireless technologies is included within the definition of a transmission medium.

[0141] The information, signals, etc., described in this disclosure can also be represented using one of a variety of different techniques. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc., which may be mentioned throughout the above description, can also be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0142] Furthermore, the terms described in this disclosure, as well as those necessary for understanding this disclosure, may be replaced with terms that have the same or similar meanings. For example, at least one of the channel and the symbol may also be a signal (signaling). Additionally, a signal may also be a message. Furthermore, a component carrier (CC) may also be referred to as a carrier frequency, cell, frequency carrier, etc.

[0143] The terms “system” and “network” are used interchangeably in this disclosure.

[0144] Furthermore, the information, parameters, etc., described in this disclosure can be represented by absolute values, relative values ​​with respect to a specific value, or other corresponding information. For example, wireless resources can also be indicated by an index.

[0145] The names used for the parameters described above are not limiting names in any respect. Furthermore, the mathematical formulas used for these parameters sometimes differ from those explicitly disclosed in this disclosure. Various channels (e.g., PUCCH, PDCCH, etc.) and information elements can be identified by all suitable names; therefore, the various names assigned to these various channels and information elements are not limiting names in any respect.

[0146] In this 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," and "component carrier" are used interchangeably. There are also instances where terms such as macro cell, small cell, femtocell, and picocell are used to refer to base stations.

[0147] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, its coverage area can be divided into several smaller areas, each of which can also provide communication services through a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). Terms such as "cell" or "sector" refer to a portion or all of the coverage area of ​​the base station and at least one of the base station subsystems providing communication services within that coverage area.

[0148] In this disclosure, the terms “Mobile Station (MS),” “user terminal,” “user equipment (UE),” and “terminal” are used interchangeably.

[0149] There are also instances where a mobile station is 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, hand set, user agent, mobile client, client, or several other appropriate terms.

[0150] At least one of the base station and the mobile station can also be referred to as a transmitting device, a receiving device, a communication device, etc. Additionally, at least one of the base station and the mobile station can also be a device mounted on a mobile body, or the mobile body itself. This mobile body can be a means of transportation (e.g., a vehicle, an airplane, etc.), a mobile body moving unmanned (e.g., a drone, an autonomous vehicle, etc.), or a robot (humanized or unmanned). Furthermore, at least one of the base station and the mobile station also includes devices that do not necessarily move during communication operations. 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.

[0151] Furthermore, the base station in this disclosure can also be replaced by a user terminal. For example, various methods / implementations of this disclosure can be applied to a structure that replaces the communication between the base station and the user terminal with communication between multiple terminals 20 (e.g., it can also be referred to as D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.). In this case, it can also be configured such that the terminal 20 has the functions of the base station 10 described above. In addition, terms such as "uplink" and "downlink" can be replaced with terms corresponding to inter-terminal communication (e.g., "side"). For example, uplink channel, downlink channel, etc. can also be replaced with side channel.

[0152] Similarly, the user terminal in this disclosure can also be replaced by a base station. In this case, it can also be configured such that the base station has the functions of the user terminal described above.

[0153] The terms "determining" and "determining" as used in this disclosure encompass a wide variety of operations. For example, "determining" or "determining" can include situations where actions such as judging, calculating, computing, processing, deriving, investigating, searching (e.g., searching in a table, database, or other data structure), and ascertaining are considered as "determining" or "determining." Furthermore, "determining" or "determining" can include situations where actions such as receiving (e.g., receiving information), transmitting (e.g., sending information), inputting, outputting, and accessing (e.g., accessing data in memory) are considered as "determining" or "determining." Additionally, "determining" or "determining" can include situations where actions such as resolving, selecting, choosing, establishing, and comparing are considered as "determining" or "determining." In other words, "judgment" and "decision" can include situations where certain operations are considered as having undergone "judgment" and "decision". In addition, "judgment (decision)" can also be replaced by "assuming", "expecting", "considering", etc.

[0154] The terms “connected,” “coupled,” or all variations thereof, refer to all direct or indirect connections or combinations between two or more elements, and can include cases where there is one or more intermediate elements between two mutually “connected” or “coupled” elements. The connection or combination between elements can be physical, logical, or a combination thereof. For example, “connected” can also be replaced by “access.” In the context of this disclosure, it is possible to consider two elements being mutually “connected” or “coupled” using at least one of one or more wires, cables, or printed electrical connections, and, as several non-limiting and non-inclusive examples, being mutually “connected” or “coupled” using electromagnetic energy with wavelengths in the wireless frequency domain, microwave region, and light (both visible and invisible) region.

[0155] The reference signal can also be simply referred to as RS (Reference Signal), or it can be called a pilot depending on the standard applied.

[0156] As used in this disclosure, the word "based on" does not mean "based on only" unless otherwise specified. In other words, the word "based on" means both "based on only" and "based on at least".

[0157] Any reference to elements using terms such as "first," "second," etc., as used in this disclosure does not comprehensively limit the quantity or order of these elements. These terms can be used in this disclosure as a convenient way to distinguish between two or more elements. Therefore, references to the first and second elements do not imply that only two elements can be used, or that the first element must take precedence over the second element in some form.

[0158] Alternatively, the "components" in the structure of the above devices can be replaced with "units", "circuits", "equipment", etc.

[0159] In this disclosure, the terms “include,” “including,” and variations thereof, as used, mean inclusiveness, similar to the term “comprising.” Furthermore, the term “or” as used in this disclosure does not mean XOR.

[0160] A wireless frame can also consist of one or more frames in the time domain. Each frame of one or more frames in the time domain can also be called a subframe. Furthermore, a subframe can also consist of one or more time slots in the time domain. A subframe can also be a fixed time length (e.g., 1 ms) independent of the parameter set (numerology).

[0161] A parameter set can also be a set of communication parameters applied in at least one of the transmission and reception of a signal or channel. For example, a parameter set can also represent at least one of the following: subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, specific filtering processing performed by the transmitter and receiver in the frequency domain, and specific windowing processing performed by the transmitter and receiver in the time domain.

[0162] In the time domain, a time slot can also be composed of one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.). A time slot can also be a time unit based on a set of parameters.

[0163] A time slot can also contain multiple mini slots. Each mini slot can also consist of one or more symbols in the time domain. Furthermore, a mini slot can also be called a sub-slot. A mini slot can also consist of fewer symbols than a time slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini slot can also be called PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using mini slots can also be called PDSCH (or PUSCH) mapping type B.

[0164] Radio frames, subframes, time slots, mini-time slots, and symbols all represent time units for transmitting signals. Radio frames, subframes, time slots, mini-time slots, and symbols can also be referred to by their respective other names.

[0165] For example, a subframe can also be called a Transmission Time Interval (TTI), multiple consecutive subframes can also be called a TTI, a time slot or a mini-time slot can also be called a TTI. That is to say, at least one of a subframe and a TTI can be a subframe in the existing LTE (1ms), a period shorter than 1ms (e.g., 1-13 symbols), or a period longer than 1ms. In addition, the unit representing TTI may not be called a subframe, but a time slot, mini-time slot, etc.

[0166] Here, TTI refers, for example, to the smallest unit of time for scheduling in wireless communication. For instance, in an LTE system, the base station schedules the allocation of radio resources (frequency bandwidth, transmit power, etc., available to each terminal 20) in TTI units for each terminal 20. However, the definition of TTI is not limited to this.

[0167] TTI can also be a unit of time for transmitting channel-coded data packets (transmission blocks), code blocks, codewords, etc., and can also be a unit of processing such as scheduling and link adaptation. In addition, when a TTI is given, the actual time interval (e.g., the number of symbols) mapped to transmission blocks, code blocks, codewords, etc. can be shorter than the TTI.

[0168] Furthermore, when a time slot or a mini-time slot is referred to as a TTI, more than one TTI (i.e., more than one time slot or more than one mini-time slot) can also serve as the minimum time unit for scheduling. In addition, the number of time slots (mini-time slots) constituting the minimum time unit of the schedule can also be controlled.

[0169] A TTI with a duration of 1ms can also be referred to as a normal TTI (TTI in LTE Rel.8-12), a standard TTI, a long TTI, a normal subframe, a standard subframe, a long subframe, a time slot, etc. A TTI shorter than a normal TTI can also be referred to as a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a mini time slot, a sub-time slot, a time slot, etc.

[0170] In addition, long TTIs (e.g., normal TTIs, subframes, etc.) can be replaced with TTIs with a duration of more than 1 ms, and short TTIs (e.g., shortened TTIs, etc.) can be replaced with TTIs with a duration of more than 1 ms but less than that of long TTIs.

[0171] A resource block (RB) is a unit of resource allocation in both the time and frequency domains. In the frequency domain, it can contain one or more consecutive subcarriers. The number of subcarriers in an RB can be the same regardless of the parameter set, for example, it can be 12. The number of subcarriers in an RB can also be determined based on the parameter set.

[0172] Furthermore, the temporal domain of an RB can contain one or more symbols, and can also be a time slot, a mini-time slot, a subframe, or the length of a TTI. A TTI, a subframe, etc., can also be composed of one or more resource blocks.

[0173] In addition, one or more RBs can also be referred to as Physical Resource Blocks (PRBs), Sub-Carrier Groups (SCGs), Resource Element Groups (REGs), PRB pairs, RB pairs, etc.

[0174] Furthermore, a resource block can also consist of one or more resource elements (REs). For example, an RE can also be a radio resource area consisting of a subcarrier and a symbol.

[0175] The Bandwidth Part (BWP) (also known as partial bandwidth, etc.) can also represent a subset of consecutive common resource blocks (RBs) used for a certain parameter set in a carrier. Here, common RBs can also be determined by the index of RBs based on the common reference point of the carrier. PRBs can also be defined in a BWP and appended with numbers within that BWP.

[0176] A BWP can also include a UL BWP and a DL BWP. For a UE, one or more BWPs can be set within a single carrier.

[0177] At least one of the configured BWPs can be active, and the UE may not intend to transmit or receive specific signals / channels outside of the active BWPs. Furthermore, terms such as "cell" and "carrier" in this disclosure can be replaced with "BWP".

[0178] The structures described above, such as radio frames, subframes, time slots, mini-time slots, and symbols, are merely illustrative. For example, the number of subframes contained in a radio frame, the number of time slots in each subframe or radio frame, the number of mini-time slots contained within a time slot, the number of symbols and RBs contained in a time slot or mini-time slot, the number of subcarriers contained in an RB, and the number of symbols in a TTI, symbol length, and cyclic prefix (CP) length can be varied in many ways.

[0179] In this disclosure, for example, in cases where articles are added through translation, such as a, an, and the in English, the disclosure may also include cases where the noun following these articles is in a plural form.

[0180] In this disclosure, the term "A is different from B" can also mean "A and B are different from each other". Additionally, this term can also mean "A and B are different from C respectively". Terms such as "separate" and "combined" can also be interpreted in the same way as "different".

[0181] The various methods / implementations described in this disclosure can be used individually or in combination, and can be switched as needed during execution. Furthermore, notification of specific information (e.g., a "It is X" notification) is not limited to explicit notification, but can also be implicit (e.g., not notifying the user of that specific information).

[0182] Furthermore, in this disclosure, SIB1 is an example of first system information. The SI message to which the information is obtained is an example of second system information. “schedulingInfoList” is an example of a first list. “schedulingInfoList-v12xy” or “schedulingInfoList2” is an example of a second list. “pos-schedulingInfoList” is an example of a third list.

[0183] The present disclosure has been described in detail above; however, it will be apparent 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 ways without departing from the spirit and scope of the present disclosure as determined by the claims. Therefore, the description in this disclosure is for illustrative purposes only and is not intended to be restrictive in any way.

[0184] This international patent application claims priority based on Japanese Patent Application No. 2020-145095, filed on August 28, 2020, the entire contents of which are incorporated herein by reference.

[0185] Symbol Explanation

[0186] 10 base stations

[0187] 110 Transmitting Unit

[0188] 120 receiving unit

[0189] 130 Setting Unit

[0190] 140 Control Unit

[0191] 20 terminals

[0192] 210 Transmitting Unit

[0193] 220 receiving unit

[0194] 230 Setting Unit

[0195] 240 Control Unit

[0196] 30-core network

[0197] 1001 processor

[0198] 1002 Storage device

[0199] 1003 Auxiliary storage device

[0200] 1004 Communication device

[0201] 1005 Input Device

[0202] 1006 Output device.

Claims

1. A terminal having: a reception unit that receives first system information from a base station; and a control unit that, when the terminal determines that a second list for scheduling second system information other than the first system information is included in the first system information, decides a start position of a window for acquiring the second system information based on a list in which a first list, the second list, and a third list are concatenated, and when the terminal determines that the second list is not included in the first system information, decides a start position of a window for acquiring the second system information based on a list in which the first list and the third list are concatenated, the reception unit receives the second system information from the base station within the window, the second list is constituted by entries that schedule extended system information that is not scheduled by the first list, and the third list is constituted by entries that schedule system information related to position information.

2. A wireless communication system including a base station and a terminal, the base station having: a transmission unit that transmits the first system information to the terminal, and the transmission unit transmits the second system information to the terminal, and the terminal having: a reception unit that receives the first system information from the base station; and a control unit that, when the terminal determines that the second list for scheduling the second system information other than the first system information is included in the first system information, acquires the first list, the second list, and the third list from the first system information, and decides a start position of a window for acquiring the second system information based on a list in which the first list, the second list, and the third list are concatenated, and when the terminal determines that the second list is not included in the first system information, acquires the first list and the third list from the first system information, and decides a start position of a window for acquiring the second system information based on a list in which the first list and the third list are concatenated, the reception unit receives the second system information from the base station within the window, the second list is constituted by entries that schedule extended system information that is not scheduled by the first list, and the third list is constituted by entries that schedule system information related to position information.

3. A communication method, a terminal performs: a step of receiving first system information from a base station; and a step of determining whether or not a second list for scheduling second system information other than the first system information is included in the first system information, and when the second list is included in the first system information, deciding a start position of a window for acquiring the second system information based on a list in which a first list, the second list, and a third list are concatenated. ​ ​ ​ ​ The control unit sets first system information including a first list, a second list, and a third list for scheduling second system information other than the first system information, and notifies a start position of a window for receiving the second system information by the terminal based on a list in which the first list, the second list, and the third list are concatenated, or the first system information includes the first list and the third list for scheduling the second system information other than the first system information, and notifies a start position of a window for receiving the second system information by the terminal based on a list in which the first list and the third list are concatenated. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ when the second list is not included in the first system information, deciding a start position of a window for acquiring the second system information based on a list obtained by combining the first list and the third list; and receiving the second system information from the base station within the window, the second list is composed of entries that schedule extended system information that is not scheduled by the first list, and the third list is composed of entries that schedule system information related to location information.

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