CN117616850A

CN117616850A - Terminal and communication method

Info

Publication number: CN117616850A
Application number: CN202180100320.2A
Authority: CN
Inventors: 熊谷慎也; 中村拓真; 小原知也; 栗田大辅; 永田聪
Original assignee: NTT Docomo Inc
Current assignee: NTT Docomo Inc
Priority date: 2021-07-20
Filing date: 2021-07-20
Publication date: 2024-02-27
Also published as: WO2023002587A1

Abstract

The terminal has: a receiving unit that receives information on a second band in a first band; and a control unit that uses the signal in the first band and the signal in the second band together, wherein the reception unit receives a shared channel of the first band including system information.

Description

Terminal and communication method

Technical Field

The present invention relates to a terminal and a communication method in a wireless communication system.

Background

In 3GPP (3 rd Generation Partnership Project: third generation partnership project), in order to achieve further increase in system capacity, further increase in data transmission speed, further decrease in delay in a Radio section, and the like, a Radio communication scheme called 5G or NR (New Radio: new air interface) (hereinafter, this Radio communication scheme is referred to as "NR") has been studied. In 5G, various studies on radio technologies and network configurations have been conducted in order to meet the requirement that a throughput (throughput) of 10Gbps or more is achieved and that a delay in a radio section is 1ms or less (for example, non-patent document 1).

Prior art literature

Non-patent literature

Non-patent document 1:3GPP TS 38.213V16.3.0 (2020-09)

Disclosure of Invention

Problems to be solved by the invention

In future wireless communication systems (e.g., rel.17 and later), it is assumed to introduce terminals that handle IoT and the like and various use cases (use cases).

However, it is not clear how to use resources for UEs with different capabilities/classes. If the resources are not properly used, there is a possibility that the system performance is lowered, such as a decrease in the utilization efficiency of the resources.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a technique capable of appropriately using resources corresponding to capabilities.

Means for solving the problems

According to the disclosed technology, there is provided a terminal having: a receiving unit that receives information on a second band in a first band; and a control unit that uses the signal in the first band and the signal in the second band together, wherein the reception unit receives a broadcast signal in the first band including system information.

Effects of the invention

According to the disclosed technology, a technology capable of appropriately using resources corresponding to capabilities is provided.

Drawings

Fig. 1 is a diagram for explaining a wireless communication system according to an embodiment of the present invention.

Fig. 2 is a diagram for explaining a situation in which a plurality of terminals are mixedly present.

Fig. 3 is a diagram for explaining a base channel (baseline channel) and an additional channel (additional channel).

Fig. 4 is a timing chart showing an example of the flow of B-PBCH transmission and a-PBCH transmission in embodiment 1.

Fig. 5 is a first diagram for explaining notification of presence of a-PBCH in embodiment 1.

Fig. 6 is a second diagram for explaining notification of presence of a-PBCH in embodiment 1.

Fig. 7 is a third diagram for explaining notification of presence of a-PBCH in embodiment 1.

Fig. 8 is a fourth diagram for explaining notification of presence of a-PBCH in embodiment 1.

Fig. 9 is a diagram showing an example of specific correspondence between B-PBCH and a-PBCH in embodiment 1.

Fig. 10 is a sequence diagram showing an example of the flow of B-PDSCH transmission and a-PDSCH transmission in embodiment 2.

Fig. 11 is a first diagram for explaining notification of presence of the a-PDSCH in embodiment 2.

Fig. 12 is a second diagram for explaining notification of presence of the a-PDSCH in embodiment 2.

Fig. 13 is a third diagram for explaining notification of presence of the a-PDSCH in embodiment 2.

Fig. 14 is a fourth diagram for explaining notification of presence of the a-PDSCH in embodiment 2.

Fig. 15 is a diagram showing an example of the functional configuration of the base station 10 in the embodiment of the present invention.

Fig. 16 is a diagram showing an example of the functional configuration of the terminal 20 according to the embodiment of the present invention.

Fig. 17 is a diagram showing an example of a hardware configuration of the base station 10 or the terminal 20 according to the embodiment of the present invention.

Detailed Description

Embodiments of the present invention will be described below with reference to the drawings. The embodiments described below are examples, and the embodiments to which the present invention is applied are not limited to the following embodiments.

The wireless communication system according to the embodiment of the present invention suitably uses the prior art when operating. However, this prior art is, for example, an existing NR, but is not limited to an existing NR.

Note that, although terms used in the conventional NR and LTE specifications such as PDCCH, RRC, MAC, DCI are used in the present specification, contents represented by channel names, protocol names, signal names, function names, and the like used in the present specification may be referred to by other names.

(System architecture)

As shown in fig. 1, the wireless communication system of the embodiment of the present invention includes a base station 10 and a terminal 20. In fig. 1, 1 base station 10 and 1 terminal 20 are shown, respectively, but this is an example, and a plurality of base stations and 1 terminal 20 may be used.

The base station 10 is a communication device that provides 1 or more cells and performs wireless communication with the terminal 20. The physical resources of the wireless signal are defined by a time domain, which may be defined by the number of OFDM symbols, and a frequency domain, which may be defined by the number of subcarriers or the number of resource blocks. Further, the TTI (Transmission Time Interval: transmission time interval) in the time domain may be a slot, and the TTI may be a subframe.

The base station 10 can perform carrier aggregation for bundling a plurality of cells (a plurality of CCs (component carriers)) and communicating with the terminal 20. In carrier aggregation, 1 Primary Cell (PCell) and 1 or more Secondary cells (SCell) are used.

The base station 10 transmits a synchronization signal, system information, and the like to the terminal 20. The synchronization signals are for example NR-PSS and NR-SSS. The synchronization signal may be SSB. The system information is transmitted, for example, through NR-PBCH (Physical Broadcast Channel: physical broadcast channel) or PDSCH (Physical Downlink Shared Channel: physical downlink shared channel), also called broadcast information. As shown in fig. 1, a base station 10 transmits control signals or data to a terminal 20 through DL (Downlink: uplink) and receives control signals or data from the terminal 20 through UL (Uplink). Here, the content transmitted through a control channel such as PUCCH (Physical Uplink Control Channel: physical uplink control channel) and PDCCH (Physical Downlink Control Channel: physical downlink control channel) is referred to as a control signal, and the content transmitted through a shared channel such as PUSCH and PDSCH is referred to as data, but this is an example.

The terminal 20 is a communication device having a wireless communication function, such as a smart phone, a mobile phone, a tablet computer, a wearable terminal, and a Machine-to-Machine (M2M) communication module. As shown in fig. 1, the terminal 20 receives a control signal or data from the base station 10 through DL and transmits the control signal or data to the base station 10 through UL, thereby utilizing various communication services provided by a wireless communication system. The terminal 20 may be referred to as a UE, and the base station 10 may be referred to as a gNB.

(problems with the prior art)

Next, problems of the related art will be described. In future wireless communication systems and networks (for example, 6G), in order to further increase communication speed, capacity, reliability, delay performance, a plurality of connections, and the like, and further to expand to new fields such as sensing, it is assumed that a wider variety of use cases and terminals than 5G, NR are supported.

In LTE and NR, a function cut from a necessary (mandatory) function supported by an existing terminal is defined as an IoT (Internet of Things: internet of things) -oriented UE type/capability (capability). The UE class/capability is for example eMTC (enhanced machine type communication: enhanced machine type communication) in LTE, NB (narrow band) -RedCap (Reduced Capability: reduced capability) in IoT, NR. Therefore, it is considered that an additional function for compensating for characteristic degradation due to the reduction of the function is required.

Fig. 2 is a diagram for explaining a situation in which a plurality of terminals are mixedly present. As shown in fig. 2, there are cases where "existing UEs communicating in a wide band and a short time", "IoT UEs using a narrower band, a longer time, and repetition" and "sensing UE (sensing UE) using a narrower band and smaller information" coexist.

As described above, in a future wireless communication system, it may be difficult to achieve efficient coexistence with existing UEs when adding a function for each use case/terminal.

(outline of the present embodiment)

In order to solve the problems of the related art, a communication method using a base line channel (first band) receivable by an arbitrary UE and an additional channel (second band) optimized for a specific UE/service together will be described in this embodiment. By using the baseline channel (baseline channel) together with the additional channel (additional channel), the connection can be maintained, for example, using the baseline channel, and the additional resources required can be communicated using the additional channel.

Fig. 3 is a diagram for explaining a base line channel and an additional channel. The terminal 20 uses the signal in the baseline channel together with the signal in the additional channel. For example, as shown in fig. 3, the terminal 20 may perform at least one of reception of SSB (block including a synchronization signal), transmission of RACH (Random Access Channel: random access channel), reception of Msg2, transmission of Msg3, reception of Msg4, reception of PDCCH thereafter, and PUSCH transmission/PDSCH reception scheduled by the PDCCH in the base line channel. The terminal 20 may perform at least one of SSB reception, RACH transmission, PDCCH reception thereafter, and PUSCH transmission/PDSCH reception scheduled by the PDCCH in the additional channel.

However, when the base line channel and the additional channel are used together, a specific transmission/reception method of broadcast information needs to be studied. The broadcast information may be, for example, a master information block (MIB: master Information Block), a system information block (SIB: system Information Block), minimum system information (RMSI: remaining Minimum System Information: remaining minimum system information, SIB 1), other system information (OSI: other System Information), paging (paging) of a terminal in a waiting service area when called, and the like.

Next, as specific examples related to the broadcast information transmission/reception method of the present embodiment, examples 1, 2, and 3 will be described.

Example 1

The present embodiment is a method in which the terminal 20 receives a broadcast signal (B-PBCH) of a base line channel including system information.

Further, the terminal 20 may receive an a-PBCH upon receiving a notification indicating that a broadcast signal (a-PBCH) of an additional channel exists.

Fig. 4 is a sequence diagram showing an example of the flow of B-PBCH transmission and a-PBCH transmission in embodiment 1. The terminal 20 receives the B-PBCH from the base station 10 (step S11). Next, the terminal 20 receives a notification indicating the presence of the a-PBCH from the base station 10 (step S12). Next, the terminal 20 receives an a-PBCH from the base station 10 (step S13).

(reception of B-PBCH of example 1)

In the above step S11, the B-PBCH may include all of the system information, or may include only a part of the system information (for example, MIB). In this case, the system information (MIB, etc.) included in the B-PBCH may include at least one of parameters related to transmission and reception of signals of the base line channel and parameters related to transmission and reception of signals of the additional channel.

For example, the system information (MIB, etc.) included in the B-PBCH may include at least one of all or a part of SFN (System frame number: system frame number), subcarrier spacing (SCS: subCarrier Spacing), offset value of SS/PBCH with respect to RB grid (grid), resource mapping of demodulation reference signal (DMRS: deModulation Reference Signal), PDCCH reception setting, connection availability (Barred) for the channel/cell, connection availability for other channels/cells/frequencies, and the like.

Here, the subcarrier interval may be a setting related to PDSCH including SIBx, a signal (for example, msg 2/4) in initial access and random access, and PDSCH for paging.

The PDCCH reception setting may be a setting related to a PDCCH for scheduling PDSCH including other system information (for example, SIB 1).

The parameter may be set in common in the terminal 20 transmitting and receiving through the channel.

The starting symbol of the B-PBCH may be determined by the subcarrier spacing.

The B-PBCH may be time-multiplexed or frequency-multiplexed with a synchronization signal of a base line channel, a demodulation reference signal of the B-PBCH, or the like. For example, the B-PBCH may be multiplexed with B-SS (base-synchronization signal: baseline synchronization signal), DMRS for B-PBCH demodulation, CRS (Cell-specific Reference Signal: cell-specific reference signal), and the like.

The B-PBCH may be a type or a type of terminal capable of receiving the terminal 20, or may be a part of terminals 20 specified by the specification incapable of receiving the terminal.

(reception of A-PBCH of example 1)

Further, as shown in step S12 and step S13 of fig. 4, the terminal 20 may receive the a-PBCH when receiving the notification indicating the presence of the a-PBCH.

The notification indicating the presence of the a-PBCH may be included in the notification indicating the presence of the synchronization signal (a-SS: additional-synchronization signal: additional synchronization signal) in the additional channel, or may be performed independently of the notification indicating the presence of the a-SS.

In the case where the notification indicating the presence of the a-PBCH is included in the notification indicating the presence of the a-SS, the terminal 20, when receiving the notification indicating the presence of the a-SS, receives the a-PBCH in consideration of receiving the notification indicating the presence of the a-PBCH.

Fig. 6 is a second diagram for explaining notification of presence of a-PBCH in embodiment 1. A notification indicating the presence of the a-PBCH may also be included in the B-PBCH. In this case, the terminal 20 receives the a-PBCH when receiving the B-PBCH including the notification indicating the presence of the a-PBCH.

Fig. 7 is a third diagram for explaining notification of presence of a-PBCH in embodiment 1. The notification indicating the presence of the a-PBCH may also be included in a signal/channel (e.g., B-PDSCH, etc.) of a baseline channel other than the B-PBCH. In this case, the terminal 20 receives the a-PBCH when receiving a signal/channel including a base line channel other than the B-PBCH indicating that the a-PBCH is present.

Fig. 8 is a fourth diagram for explaining notification of presence of a-PBCH in embodiment 1. The notification indicating the presence of the a-PBCH may also be included in a signal/channel (e.g., a-PDSCH, etc.) of an additional channel (third band) different from the additional channel (second band) on which the a-PBCH is transmitted.

The notification indicating the presence of the a-PBCH may be a notification including at least one of the time, frequency, and code of the a-PBCH.

The terminal 20 may not receive the a-PBCH when receiving the notification indicating that the a-PBCH does not exist, and may receive the a-PBCH when not receiving the notification indicating that the a-PBCH does not exist. The behavior of the terminal 20 in this case may be defined by a specification.

In addition, the terminal 20 may receive the a-PBCH if it does not receive a notification indicating the presence or absence of the a-PBCH, or may not receive the a-PBCH. The behavior of the terminal 20 in this case may be defined by a specification.

The a-PBCH may also contain only a portion of the system information (e.g., MIB). In this case, the system information (MIB, etc.) included in the a-PBCH may include at least one of parameters related to transmission and reception of signals of the base line channel and parameters related to transmission and reception of signals of the additional channel.

For example, the B-PBCH may include parameters related to transmission and reception of signals of the base line channel, and the a-PBCH may include parameters related to transmission and reception of signals of the additional channel.

The setting or information related to the detection or demodulation of the a-PBCH may be defined by a specification, may be included in the B-PBCH, may be included in a signal/channel (e.g., B-PDSCH, etc.) of a base line channel other than the B-PBCH, and may be included in a signal/channel (e.g., a-PDSCH, etc.) of an additional channel (third band) different from the additional channel (second band) on which the a-PBCH is transmitted.

Regarding the a-PBCH, it may be that the terminal 20 having a specific type or terminal capability is able to receive.

The a-PBCH and the B-PBCH may be multiplexed in the same BWP (Bandwidth Part) in the same cell or other BWP to at least one of time, frequency, and code, or may be transmitted in another cell. That is, a common BWP may be defined or set in the base line channel and the additional channel, and an individual BWP may be defined or set.

In addition, the terminal 20 can also assume that the a-PBCH and the B-PBCH are transmitted using the same transmission beam (spatial filter). Further, the terminal 20 may also assume that the a-PBCH and the B-PBCH having a specific correspondence relationship are transmitted using the same transmission beam (spatial filter). Here, the concept may be defined as a case where the a-PBCH and the B-PBCH exist in at least one of the same BWP, the same cell, the same band, and the same frequency band (FR 1/FR 2).

Here, the terminal 20 may be notified from the base station 10 whether or not there is a specific correspondence relationship. The notification of whether or not the specific correspondence relationship is present may be included in the B-PBCH, may be included in a signal/channel of a base line channel other than the B-PBCH (for example, B-PDSCH, etc.), and may be included in a signal/channel of an additional channel (third band) different from an additional channel (second band) transmitting the a-PBCH (for example, a-PDSCH, etc.).

Fig. 9 is a diagram showing an example of specific correspondence between B-PBCH and a-PBCH in embodiment 1. As shown in fig. 9, a specific correspondence relationship may be set when the a-PBCH and the B-PBCH overlap in the time domain, that is, when frequencies or codes are multiplexed.

Here, the case where the specific correspondence relationship is present may be limited to at least one of the same BWP, the same cell, the same band, and the same frequency band (FR 1/FR 2).

The terminal 20 may assume that the transmission periods of the a-PBCH and the B-PBCH are the same, or that the transmission periods of the a-PBCH and the B-PBCH are different. Further, the terminal 20 may assume that the transmission periods of the a-PBCH and the B-PBCH having a specific correspondence relationship are the same.

(effects of the wireless communication system of embodiment 1)

In the wireless communication system of the present embodiment, the terminal 20 receives a broadcast signal (B-PBCH) of a base line channel containing system information. Thus, when the base line channel and the additional channel are used together, system information can be appropriately transmitted and received, and resources corresponding to the capability can be appropriately used.

Further, the terminal 20 may receive an a-PBCH when receiving a notification indicating that a broadcast signal (a-PBCH) of an additional channel exists. Thus, for example, when the bandwidth of the base line channel is small, the additional channel can be effectively used to appropriately transmit and receive system information.

Example 2

The present embodiment is a method in which the terminal 20 receives a shared channel (B-PDSCH) of a base line channel containing system information.

Further, the terminal 20 may receive a shared channel (a-PDSCH) including system information when receiving a notification indicating that there is an additional channel including system information.

Fig. 10 is a sequence diagram showing an example of the flow of B-PDSCH transmission and a-PDSCH transmission in embodiment 2. The terminal 20 receives a B-PDCCH from the base station 10 (step S21). Here, the B-PDCCH includes DCI (Downlink Control Information: downlink control information) for scheduling the B-PDSCH.

Next, the terminal 20 receives the B-PDSCH according to the schedule specified by the DCI (step S22).

Further, the terminal 20 receives a notification indicating that there is an a-PDSCH including system information (step S23). Next, the terminal 20 receives an a-PDCCH from the base station 10 (step S24). Here, the a-PDCCH includes DCI that schedules an a-PDSCH including system information.

Next, the terminal 20 receives the a-PDSCH including system information according to the schedule specified by the DCI (step S25).

(reception of B-PDSCH of example 2)

In step S22 described above, the B-PDSCH may include all of the system information, or may include only a part of the system information (for example, at least one of MIB and SIB).

For example, the reception of the B-PBCH of embodiment 1 may be combined, MIB may be included in the B-PBCH, and SIB may be included in the B-PDSCH.

Here, the settings related to the B-PDCCH including DCI for scheduling the B-PDSCH including each SIB may be different for a specific SIB (for example, SIB 1) and other SIBs.

For example, the setting related to the B-PDCCH including DCI scheduling SIB1 can be notified by MIB transmitted by the B-PBCH of embodiment 1. The setting of the B-PDCCH including DCI for scheduling another SIB may be notified by SIB1, and if not notified, the setting may be the same as the setting of the B-PDCCH including DCI for scheduling SIB 1.

The DCI format transmitted using the B-PDCCH may be the same as or partially defined as the DCI format that can be transmitted using the PDCCH (a-PDCCH) of the additional channel. For example, the DCI format transmitted using the B-PDCCH may be a backoff DCI (fallback DCI) format, a DCI format having only a specific field, or the like.

The SIB or the specific SIB (for example, SIB 1) included in the B-PDSCH may include at least one of parameters related to transmission and reception of signals of the base line channel and parameters related to transmission and reception of signals of the additional channel.

For example, the SIB or the specific SIB (for example, SIB 1) included in the B-PDSCH may include at least one of a timing of transmission of a Synchronization Signal (SS), a transmission period of the SS, a transmission power of the SS, a TDD (Time Division Duplex: time division duplex) mode, a DL reception setting (paging, PDCCH, PDSCH), and a UL transmission setting (RACH, PUSCH, PUCCH).

The B-PDSCH including system information and the B-PDCCH including DCI for scheduling the B-PDSCH may be receivable by a terminal 20 having any type or terminal capability, or may be receivable by a part of terminals 20 specified by the specification.

(reception of A-PDSCH of example 2)

Further, as shown in steps S23 to S25 of fig. 10, when the terminal 20 receives a notification indicating that there is an a-PDSCH containing system information, it may receive the a-PDSCH containing system information.

The notification indicating the presence of the a-PDSCH including the system information may be included in the notification indicating the presence of the a-PBCH, or may be performed independently of the notification indicating the presence of the a-PBCH.

When a notification indicating that an a-PDSCH including system information exists is included in a notification indicating that an a-PBCH exists, the terminal 20 considers that a notification indicating that an a-PDSCH including system information exists is received and receives an a-PDCCH scheduling the a-PDSCH and the a-PDSCH including system information when receiving the notification indicating that the a-PBCH exists.

Fig. 12 is a second diagram for explaining notification of presence of the a-PDSCH in embodiment 2. A notification indicating that there is an a-PDSCH containing system information may be also contained in a B-PDSCH containing system information. In this case, when receiving the B-PDSCH including the system information including the notification indicating the presence of the a-PDSCH, the terminal 20 receives the a-PDCCH for scheduling the a-PDSCH and the a-PDSCH including the system information.

Fig. 13 is a third diagram for explaining notification of presence of the a-PDSCH in embodiment 2. The notification indicating the presence of the a-PDSCH including the system information may be included in a signal/channel of a base line channel other than the B-PDSCH including the system information (for example, a B-PDSCH including no system information). In this case, when receiving a signal/channel including a base line channel other than the B-PBCH including system information, which indicates that there is a notification of the a-PDSCH including system information, the terminal 20 receives an a-PDCCH scheduling the a-PDSCH and the a-PDSCH including system information.

Fig. 14 is a fourth diagram for explaining notification of presence of the a-PDSCH in embodiment 2. The notification indicating the presence of the a-PDSCH including the system information may be included in a signal/channel (for example, an a-PDSCH including no system information or the like) of an additional channel (third band) different from the additional channel (second band) on which the a-PDSCH including the system information is transmitted.

The terminal 20 may not receive the a-PDSCH including the system information when receiving the notification indicating that the a-PDSCH including the system information does not exist, and may receive the a-PDSCH including the system information when receiving the notification indicating that the a-PDSCH including the system information does not exist. The behavior of the terminal 20 in this case may be defined by a specification.

In addition, the terminal 20 may receive the a-PDSCH including the system information or may not receive the a-PDSCH including the system information if it does not receive a notification indicating the presence or absence of the a-PDSCH including the system information. The behavior of the terminal 20 in this case may be defined by a specification.

The a-PDSCH may include only a part of system information (for example, MIB) and may include only a part (SIB) other than MIB.

Here, the settings related to the a-PDCCH for scheduling the a-PDSCH including each SIB may be different from each other with respect to a specific SIB (for example, SIB 1) and other SIBs.

For example, the setting related to the A-PDCCH scheduling the SIB1 can be notified by the MIB transmitted by the B-PBCH of embodiment 1 or the MIB transmitted by the A-PBCH of embodiment 1. The setting of the a-PDCCH for scheduling other SIBs may be notified by SIB1, and if not notified, the setting may be the same as the setting of the a-PDCCH for scheduling SIB 1.

The SIB included in the a-PDSCH or the specific SIB (for example, SIB 1) may include at least one of parameters related to transmission and reception of signals of the base line channel and parameters related to transmission and reception of signals of the additional channel. For example, the B-PDSCH may include parameters related to transmission and reception of signals of the base line channel, and the a-PDSCH may include parameters related to transmission and reception of signals of the additional channel.

Regarding the a-PDSCH containing system information and the a-PDCCH containing DCI scheduling the a-PDSCH, it may be that the terminal 20 having a specific type or terminal capability is able to receive.

The a-PDSCH and the B-PDSCH containing system information and the a-PDCCH and the B-PDCCH containing DCI for scheduling them may be multiplexed in the same BWP in the same cell or in other BWP, or may be transmitted in other cells. That is, a common BWP may be defined or set in the base line channel and the additional channel, and an individual BWP may be defined or set.

It is also conceivable that the terminal 20 transmits at least one of the a-PDSCH and the B-PDSCH including system information and the a-PDCCH and the B-PDCCH including DCI for scheduling them using the same transmission beam (spatial filter). Here, the concept may be limited to a case where at least one of an a-PDSCH and a B-PDSCH including system information and an a-PDCCH and a B-PDCCH including DCI for scheduling them exists in at least one of the same BWP, the same cell, the same band, and the same frequency band (FR 1/FR 2). Further, the terminal 20 may assume that at least one of the a-PDSCH and the B-PDSCH having a specific correspondence and the a-PDCCH and the B-PDCCH having a specific correspondence is transmitted using the same transmission beam (spatial filter).

Here, the terminal 20 may be notified from the base station 10 whether or not there is a specific correspondence relationship. The notification of whether or not the specific correspondence relationship is present may be included in the B-PDSCH including the system information, may be included in a signal/channel of a base line channel other than the B-PDSCH including the system information (for example, a B-PDSCH including no system information, etc.), or may be included in a signal/channel of an additional channel (third band) different from an additional channel (second band) on which the a-PDSCH including the system information is transmitted (for example, an a-PDSCH including no system information, etc.).

It may be assumed that at least one of an a-PDSCH and a B-PDSCH including system information and an a-PDCCH and a B-PDCCH including DCI scheduling them has a specific correspondence relationship when they overlap in the time domain, that is, when frequencies or codes are multiplexed.

The terminal 20 may assume that at least one of the a-PDSCH and the B-PDSCH including system information and the a-PDCCH and the B-PDCCH including DCI for scheduling them have the same transmission period, and may assume that at least one of the a-PDSCH and the B-PDSCH including system information and the a-PDCCH and the B-PDCCH including DCI for scheduling them have different transmission periods. Further, the terminal 20 may assume that at least one of the a-PDSCH and the B-PDSCH having a specific correspondence relationship and the a-PDCCH and the B-PDCCH having a specific correspondence relationship has the same transmission cycle.

(effects of the wireless communication system of embodiment 2)

In the wireless communication system of the present embodiment, the terminal 20 receives a shared channel (B-PDSCH) of a base line channel containing system information. Thus, when the base line channel and the additional channel are used together, system information can be appropriately transmitted and received, and resources corresponding to the capability can be appropriately used.

Further, the terminal 20 may receive a shared channel (a-PDSCH) including system information when receiving a notification indicating that the a-PDSCH including additional channels including system information exists. Thus, for example, when the bandwidth of the base line channel is small, the additional channel can be effectively used to appropriately transmit and receive system information.

(relationship of example 1 and example 2)

The wireless communication system may implement embodiment 1 and embodiment 2 separately, or may implement embodiment 1 and embodiment 2 together. By implementing embodiment 1 and embodiment 2 together, system information can be transmitted and received more dispersedly, and therefore resources can be effectively utilized.

Example 3

The present embodiment is a method in which the terminal 20 receives a shared channel (B-PDSCH) of a base line channel containing paging information.

Further, the terminal 20 may receive the a-PDSCH including paging information when receiving a notification indicating that there is a shared channel (a-PDSCH) including an additional channel for paging information.

The flow of B-PDSCH transmission and a-PDSCH transmission in this embodiment is the same as that of embodiment 2 shown in fig. 10.

(reception of B-PDSCH of example 3)

At least one of the setting of the B-PDSCH including paging information and the setting of the B-PDCCH including DCI scheduling the B-PDSCH may be notified by at least one of MIB and SIB, and if not notified, the setting may be the same as the setting of the B-PDSCH including SIB1 and the B-PDCCH including DCI scheduling the B-PDSCH.

For example, as in the case of cross-carrier scheduling (Cross carrier scheduling), DCI for scheduling a B-PDSCH including paging information may schedule at least one of the B-PDSCH and the a-PDSCH.

The paging information included in the B-PDSCH may include 1 or more UE identifiers. In this case, the terminal 20 whose UE identifier matches the own UE identifier may assume that the paging information is for its own UE and perform a UE state change operation (for example, transition to an RRC CONNECTED state (RRC CONNECTED state) by a random access procedure).

Further, the UE identifier in this case may be notified in common for the base line channel and the additional channel, or may be notified separately. That is, the state management of the terminal 20 may be performed in common in the base line channel and the additional channel, or may be performed separately.

The B-PDSCH including paging information and the B-PDCCH including DCI for scheduling the B-PDSCH may be receivable by a terminal 20 having any type or terminal capability, or may be receivable by a part of terminals 20 specified by the specification.

(reception of A-PDSCH of example 3)

Further, as shown in steps S23 to S25 of fig. 10, when the terminal 20 receives a notification indicating that there is an a-PDSCH including paging information, it may also receive an a-PDSCH including paging information.

At least one of the setting of the a-PDSCH including paging information and the setting of the a-PDCCH including DCI scheduling the a-PDSCH may be notified by at least one of MIB and SIB, and if not notified, the setting may be the same as the setting of the a-PDSCH including SIB1 and the a-PDCCH including DCI scheduling the a-PDSCH.

The terminal 20 that received the setting may not receive at least one of the B-PDSCH including paging information and the B-PDCCH including DCI for scheduling the B-PDSCH.

For example, as in cross-carrier scheduling (Cross carrier scheduling), DCI for scheduling an a-PDSCH including paging information may schedule at least one of a B-PDSCH and an a-PDSCH.

The paging information included in the a-PDSCH may include 1 or more UE identifiers. In this case, the terminal 20 whose UE identifier matches the own UE identifier may assume that the paging information is information of its own and perform a UE state change operation (for example, transition to an RRC CONNECTED state (RRC CONNECTED state) by a random access procedure).

Regarding the a-PDSCH containing paging information and the a-PDCCH containing DCI scheduling the a-PDSCH, it may be that the terminal 20 having a specific type or terminal capability is able to receive.

The a-PDSCH and the B-PDSCH containing paging information and the a-PDCCH and the B-PDCCH containing DCI for scheduling them may be multiplexed in the same BWP in the same cell or in other BWP, or may be transmitted in other cells. That is, a common BWP may be defined or set in the base line channel and the additional channel, and an individual BWP may be defined or set.

It is also conceivable that the terminal 20 transmits at least one of the a-PDSCH and the B-PDSCH including paging information and the a-PDCCH and the B-PDCCH including DCI for scheduling them using the same transmission beam (spatial filter). Here, the concept may be limited to a case where at least one of an a-PDSCH and a B-PDSCH including paging information and an a-PDCCH and a B-PDCCH including DCI for scheduling them exists in at least one of the same BWP, the same cell, the same band, and the same frequency band (FR 1/FR 2). Further, the terminal 20 may assume that at least one of the a-PDSCH and the B-PDSCH having a specific correspondence and the a-PDCCH and the B-PDCCH having a specific correspondence is transmitted using the same transmission beam (spatial filter).

Here, the terminal 20 may be notified from the base station 10 whether or not there is a specific correspondence relationship. The notification of whether or not the specific correspondence relationship is present may be included in the B-PDSCH including paging information, may be included in a signal/channel of a base line channel other than the B-PDSCH including paging information (for example, a B-PDSCH including no paging information, etc.), or may be included in a signal/channel of an additional channel (third band) different from an additional channel (second band) on which the a-PDSCH including paging information is transmitted (for example, an a-PDSCH including no paging information, etc.).

It may be assumed that at least one of an a-PDSCH and a B-PDSCH including paging information and an a-PDCCH and a B-PDCCH including DCI scheduling them has a specific correspondence relationship when they overlap in the time domain, that is, when frequencies or codes are multiplexed.

The terminal 20 may assume that at least one of the a-PDSCH and the B-PDSCH including paging information and the a-PDCCH and the B-PDCCH including DCI for scheduling them have the same transmission period, and may assume that at least one of the a-PDSCH and the B-PDSCH including paging information and the a-PDCCH and the B-PDCCH including DCI for scheduling them have different transmission periods. Further, the terminal 20 may assume that at least one of the a-PDSCH and the B-PDSCH having a specific correspondence relationship and the a-PDCCH and the B-PDCCH having a specific correspondence relationship has the same transmission cycle.

(effects of the wireless communication system of embodiment 3)

In the wireless communication system of the present embodiment, the terminal 20 receives a shared channel (B-PDSCH) of the base line channel containing paging information. Thus, when the base line channel and the additional channel are used together, paging information can be appropriately transmitted and received, and resources corresponding to the capability can be appropriately used.

Further, the terminal 20 may receive the a-PDSCH including the paging information when receiving a notification indicating that the shared channel (a-PDSCH) including the additional channel including the paging information exists. Thus, for example, when the bandwidth of the base line channel is small, the additional channel can be effectively used to appropriately transmit and receive paging information.

(relation of example 1 and example 2 with example 3)

The wireless communication system may implement embodiment 1 and embodiment 3 together, or may implement embodiment 2 and embodiment 3 together. In addition, the wireless communication system may also implement embodiment 1, embodiment 2, and embodiment 3. By implementing embodiment 1 or embodiment 2 and embodiment 3 together, system information and paging information can be transmitted and received in a distributed manner, and therefore resources can be effectively utilized.

By the technique of the present embodiment described above, a technique is provided in which resources corresponding to capabilities can be used appropriately.

(device Structure)

Next, a functional configuration example of the base station 10 and the terminal 20 that execute the processing and operation described above will be described.

< base station 10>

Fig. 15 is a diagram showing an example of the functional configuration of the base station 10. As shown in fig. 15, the base station 10 includes a transmitting unit 110, a receiving unit 120, a setting unit 130, and a control unit 140. The functional configuration shown in fig. 15 is merely an example. The names of the functional sections and the functional differentiation may be arbitrary as long as the operations of the embodiments of the present invention can be executed. The transmitting unit 110 and the receiving unit 120 may be collectively referred to as a communication unit.

The transmitting unit 110 includes a function of generating a signal to be transmitted to the terminal 20 side and transmitting the signal wirelessly. The receiving unit 120 includes a function of receiving various signals transmitted from the terminal 20 and acquiring, for example, higher-layer information from the received signals. The transmitting unit 110 also has a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL/UL control signals, DCI based on PDCCH, data based on PDSCH, and the like to the terminal 20.

The setting unit 130 stores the preset setting information and various setting information transmitted to the terminal 20 in a storage device included in the setting unit 130, and reads the setting information from the storage device as needed.

The control unit 140 performs scheduling of DL reception or UL transmission by the terminal 20 via the transmission unit 110. The control unit 140 also includes a function of performing LBT. The transmitting unit 110 may include a function unit related to signal transmission in the control unit 140, and the receiving unit 120 may include a function unit related to signal reception in the control unit 140. The transmitter 110 may be referred to as a transmitter, and the receiver 120 may be referred to as a receiver.

< terminal 20>

Fig. 16 is a diagram showing an example of the functional configuration of the terminal 20. As shown in fig. 16, the terminal 20 includes a transmitting unit 210, a receiving unit 220, a setting unit 230, and a control unit 240. The functional configuration shown in fig. 16 is merely an example. The names of the functional sections and the functional differentiation may be arbitrary as long as the operations of the embodiments of the present invention can be executed. The transmitting unit 210 and the receiving unit 220 may be collectively referred to as a communication unit.

The transmitting unit 210 generates a transmission signal from the transmission data, and wirelessly transmits the transmission signal. The receiving unit 220 receives various signals wirelessly and acquires a higher layer signal from the received physical layer signal. The reception unit 220 also has a function of receiving NR-PSS, NR-SSS, NR-PBCH, DL/UL/SL control signals, DCI based on PDCCH, data based on PDSCH, and the like transmitted from the base station 10. For example, as D2D communication, the transmitting unit 210 may transmit PSCCH (Physical Sidelink Control Channel: physical side-link control channel), PSSCH (Physical Sidelink Shared Channel: physical side-link shared channel), PSDCH (Physical Sidelink Discovery Channel: physical side-link discovery channel), PSBCH (Physical Sidelink Broadcast Channel: physical side-link broadcast channel) or the like to the other terminal 20, and the receiving unit 120 may receive PSCCH, PSSCH, PSDCH, PSBCH or the like from the other terminal 20.

The setting unit 230 stores various setting information received by the receiving unit 220 from the base station 10 or other terminals in a storage device included in the setting unit 230, and reads the setting information from the storage device as necessary. The setting unit 230 also stores preset setting information. The control unit 240 controls the terminal 20. The control unit 240 also includes a function of performing LBT.

The terminal of the present embodiment may be configured as a terminal shown in the following items. In addition, the following communication method may be implemented.

< structures related to example 1, examples 1 and 2, examples 1, 2 and 3 >

(item 1)

A terminal, wherein the terminal has:

a receiving unit that receives information on a second band in a first band; and

a control section that uses the signal in the first band and the signal in the second band together,

the receiving unit receives a broadcast signal of the first band including system information.

(item 2)

The terminal according to claim 1, wherein,

the receiving section also receives a broadcast signal of the second band.

(item 3)

The terminal according to claim 1 or 2, wherein,

the receiving unit also receives a shared channel of the first band including system information.

(item 4)

The terminal according to claim 3, wherein,

the receiving unit also receives a shared channel of the second band including system information.

(item 5)

The terminal according to any one of items 1 to 4, wherein,

the receiving section also receives a shared channel of the first band including paging information.

(item 6)

A communication method performed by a terminal, the communication method having the steps of:

receiving information related to a second band within the first band;

using the signal in the first band domain and the signal in the second band domain together; and

a broadcast signal of the first band including system information is received.

According to any one of the above configurations, a technique is provided that can appropriately use resources corresponding to capabilities. According to item 2, a broadcast signal of the second band can be received. According to item 3, by receiving the shared channel of the first band containing the system information, the system information can be further received dispersedly. According to item 4, by receiving the shared channel of the second band including the system information, transmission and reception of the system information can be further made efficient. According to item 5, transmission and reception of paging information can be achieved by receiving a shared channel of a first band including paging information.

< Structure relating to example 2, examples 2 and 3 >

(item 1)

A terminal, wherein the terminal has:

the receiving unit receives a shared channel of the first band including system information.

(item 2)

The terminal according to claim 1, wherein,

(item 3)

The terminal according to claim 2, wherein,

the shared channel of the first band is a channel that can be received by a terminal of any type or terminal capability,

the shared channel of the second band is a channel that a terminal having a specific type or terminal capability can receive.

(item 4)

The terminal according to any one of items 1 to 3, wherein,

(item 5)

The terminal according to claim 4, wherein,

the receiving section also receives a shared channel of the second band including paging information.

(item 6)

receiving information related to a second band within the first band;

a shared channel of the first band including system information is received.

According to any one of the above configurations, a technique is provided that can appropriately use resources corresponding to capabilities. According to item 2, a shared channel of the second band can be received. According to item 3, the shared channel of the first band and the shared channel of the second band are used together, and only the shared channel of the first band is received except for a terminal having a specific type or terminal capability, whereby system information can be received further dispersedly. According to item 4, transmission and reception of paging information can be achieved by receiving a shared channel of a first band including paging information. According to item 5, transmission and reception of paging information can be received in a distributed manner by receiving a shared channel of the second band including paging information.

(hardware construction)

The block diagrams (fig. 15 and 16) used in the description of the above embodiment show blocks in units of functions. These functional blocks (structures) are realized by any combination of at least one of hardware and software. The implementation method of each functional block is not particularly limited. That is, each functional block may be realized by using one device physically or logically combined, or may be realized by directly or indirectly (for example, by using a wire, a wireless, or the like) connecting two or more devices physically or logically separated from each other, and using these plural devices. The functional blocks may also be implemented by combining software with the above-described device or devices.

Functionally, there are judgment, decision, judgment, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, establishment, comparison, assumption, expectation, view, broadcast (broadcast), notification (notification), communication (communication), forwarding (forwarding), configuration, reconfiguration (allocation), allocation (allocating, mapping), assignment (allocation), and the like, but not limited thereto. For example, a functional block (configuration unit) that causes transmission to function is called a transmitter (transmitting unit) or a transmitter (transmitter). In short, the implementation method is not particularly limited as described above.

For example, the base station 10, the terminal 20, and the like in one embodiment of the present disclosure may also function as a computer that performs the processing of the wireless communication method of the present disclosure. Fig. 17 is a diagram showing an example of the hardware configuration of the base station 10 and the terminal 20 according to one embodiment of the present disclosure. The base station 10 and the terminal 20 may be configured as a computer device physically 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, and the like.

In addition, in the following description, the term "means" may be replaced with "circuit", "device", "unit", or the like. The hardware configuration of the base station 10 and the terminal 20 may be configured to include one or more of the illustrated devices, or may be configured to include no part of the devices.

The functions in the base station 10 and the terminal 20 are realized by the following methods: predetermined software (program) is read into hardware such as the processor 1001 and the storage device 1002, and the processor 1001 performs an operation to control communication by the communication device 1004 or to control at least one of reading and writing of data in the storage device 1002 and the auxiliary storage device 1003.

The processor 1001 controls the entire computer by, for example, operating an operating system. The processor 1001 may be configured by a central processing unit (CPU: central Processing Unit) including an interface with peripheral devices, 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 may be realized by the processor 1001.

Further, the processor 1001 reads out a program (program code), a software module, data, or the like from at least one of the auxiliary storage device 1003 and the communication device 1004 to the storage device 1002, and executes various processes accordingly. As the program, a program that causes a computer to execute at least a part of the operations described in the above embodiments is used. For example, the control unit 140 of the base station 10 shown in fig. 15 may be realized by a control program stored in the storage device 1002 and operated by the processor 1001. For example, the control unit 240 of the terminal 20 shown in fig. 16 may be implemented by a control program stored in the storage device 1002 and operated by the processor 1001. Although the above-described various processes are described as being executed by one processor 1001, the above-described various processes may be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may also be installed by more than one chip. In addition, the program may also be transmitted from the network via a telecommunication line.

The storage device 1002 is a computer-readable recording medium, and may be configured by at least one of a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM: erasable programmable ROM), an EEPROM (Electrically Erasable Programmable ROM: electrically erasable programmable ROM), a RAM (Random Access Memory: random access Memory), and the like, for example. The storage 1002 may also be referred to as a register, a cache, a main memory (main storage), or the like. The storage device 1002 can store a program (program code), a software module, or the like that can be executed to implement the communication method according to one embodiment of the present disclosure.

The auxiliary storage device 1003 is a computer-readable recording medium, and may be configured of at least one of an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a Floppy disk, a magneto-optical disk (for example, a compact disk, a digital versatile disk, a Blu-ray (registered trademark) disk), a smart card, a flash memory (for example, a card, a stick, a Key drive), a Floppy (registered trademark) disk, a magnetic stripe, and the like. The storage medium may be, for example, a database including at least one of the storage device 1002 and the auxiliary storage device 1003, a server, or other suitable medium.

The communication device 1004 is hardware (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, for example. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, and the like, for example, in order to realize at least one of frequency division duplexing (FDD: frequency Division Duplex) and time division duplexing (TDD: time Division Duplex). For example, a transmitting/receiving antenna, an amplifier unit, a transmitting/receiving unit, a transmission path interface, and the like may be realized by the communication device 1004. The transmitting/receiving unit may be physically or logically separately installed in the transmitting unit and the receiving unit.

The input device 1005 is an input apparatus (for example, a keyboard, a mouse, a microphone, a switch, a key, a sensor, or the like) that receives an input from the outside. The output device 1006 is an output apparatus (for example, a display, a speaker, an LED lamp, or the like) that performs output to the outside. The input device 1005 and the output device 1006 may be integrally formed (for example, a touch panel).

The processor 1001 and the storage device 1002 are connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus or may be configured using a different bus for each device.

The base station 10 and the terminal 20 may be configured by hardware including a microprocessor, a digital signal processor (DSP: digital Signal Processor), an ASIC (Application Specific Integrated Circuit: application specific integrated circuit), a PLD (Programmable Logic Device: programmable logic device), an FPGA (Field Programmable Gate Array: field programmable gate array), or the like, or may be configured by hardware to realize a part or all of the respective functional blocks. For example, the processor 1001 may also be installed using at least one of these hardware.

(supplement of the embodiment)

While the embodiments of the present invention have been described above, the disclosed invention is not limited to such embodiments, and those skilled in the art will appreciate various modifications, adaptations, alternatives, substitutions, and the like. Specific numerical examples are described for the purpose of promoting the understanding of the present invention, but these numerical values are merely examples unless otherwise indicated, and any appropriate values may be used. The distinction between items in the above description is not essential to the present invention, and items described in two or more items may be used in combination as necessary, or items described in one item may be applied to items described in other items (unless contradiction arises). The boundaries of functional units or processing units in the functional block diagrams do not necessarily correspond to the boundaries of physical components. The operations of the plurality of functional units may be physically performed by one member, or the operations of one functional unit may be physically performed by a plurality of members. With regard to the processing procedures described in the embodiments, the order of processing may be exchanged without contradiction. For ease of illustration, the base station 10 and terminal 20 are illustrated using functional block diagrams, but such means may also be implemented in hardware, in software, or in a combination thereof. The software operating by the processor provided by the base station 10 according to the embodiment of the present invention and the software operating by the processor provided by the terminal 20 according to the embodiment of the present invention may also be stored in Random Access Memory (RAM), flash memory, read Only Memory (ROM), EPROM, EEPROM, registers, hard disk (HDD), a removable disk, a CD-ROM, a database, a server, and any other suitable storage medium, respectively.

Further, the notification of the information is not limited to the form/embodiment described in the present disclosure, and may be performed using other methods. For example, the notification of the information may be implemented by physical layer signaling (e.g., DCI, UCI (Uplink Control Information: uplink control information)), higher layer signaling (e.g., RRC (Radio Resource Control: radio resource control) signaling, MAC (Medium Access Control: medium access control) signaling, broadcast information (MIB (Master Information Block: master information block), SIB (System Information Block: system information block)), other signals, or a combination thereof).

The various forms/embodiments described in the present disclosure may also be applied to at least one of LTE (Long Term Evolution: long term evolution), LTE-a (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4 th generation mobile communication system: fourth generation mobile communication system), 5G (5 th generation mobile communication system: fifth generation mobile communication system), FRA (Future Radio Access: future wireless access), NR (new Radio: new air interface), W-CDMA (registered trademark), GSM (registered trademark), CDMA 2000, UMB (Ultra Mobile Broadband: ultra mobile broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-wide), bluetooth (registered trademark), systems using other suitable systems, and next generation systems extended accordingly. Further, a plurality of systems (for example, a combination of 5G and at least one of LTE and LTE-a) may be applied in combination.

The processing procedures, timings, flows, and the like of the respective modes/embodiments described in the present specification can be replaced without contradiction. For example, for the methods described in this disclosure, elements of the various steps are presented using an illustrated order, but are not limited to the particular order presented.

In the present specification, the specific operation performed by the base station 10 may be performed by an upper node (upper node) thereof, as the case may be. In a network composed of one or more network nodes (network nodes) having a base station 10, it is apparent that various operations performed for communication with a terminal 20 may be performed by at least one of the base station 10 and other network nodes (for example, MME or S-GW, etc. are considered, but not limited thereto) other than the base station 10. In the above, the case where one other network node other than the base station 10 is illustrated, but the other network node may be a combination of a plurality of other network nodes (for example, MME and S-GW).

Information, signals, or the like described in the present disclosure can be output from a higher layer (or a lower layer) to a lower layer (or a higher layer). Or may be input or output via a plurality of network nodes.

The input or output information and the like may be stored in a specific location (for example, a memory), or may be managed using a management table. The input or output information and the like can be rewritten, updated or recorded. The outputted information and the like may also be deleted. The input information and the like may also be transmitted to other devices.

The determination in the present disclosure may be performed by a value (0 or 1) represented by 1 bit, may be performed by a Boolean value (true or false), or may be performed by a comparison of numerical values (e.g., a comparison with a predetermined value).

With respect to software, whether referred to as software, firmware, middleware, microcode, hardware description language, or by other names, should be broadly interpreted to refer to a command, a set of commands, code, a code segment, program code, a program (program), a subroutine, a software module, an application, a software package, a routine, a subroutine, an object, an executable, a thread of execution, a procedure, a function, or the like.

In addition, software, commands, information, etc. may be transmitted and received via a transmission medium. For example, in the case where software is transmitted from a website, server, or other remote source using at least one of a wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL: digital Subscriber Line), etc.) and wireless technology (infrared, microwave, etc.), at least one of the wired and wireless technologies is included in the definition of transmission medium.

Information, signals, etc. described in this disclosure may also be represented using any of a variety of different technologies. For example, data, commands, instructions (commands), information, signals, bits, symbols, chips (chips), and the like may be referenced throughout the above description by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or photons, or any combination thereof.

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

The terms "system" and "network" as used in this disclosure may be used interchangeably.

In addition, information, parameters, and the like described in this disclosure may be expressed using absolute values, relative values to predetermined values, or other information corresponding thereto. For example, radio resources may also be indicated by an index.

The names used for the above parameters are non-limiting in any respect. Further, the numerical formulas and the like using these parameters may also be different from those explicitly disclosed in the present disclosure. The various channels (e.g., PUCCH, PDCCH, etc.) and information elements may be identified by all appropriate names, and thus the various names assigned to these various channels and information elements are non-limiting in any respect.

In the present disclosure, terms such as "Base Station", "radio Base Station", "fixed Station", "NodeB", "eNodeB (eNB)", "gndeb (gNB)", "access point", "transmission point (transmission point)", "reception point", "transmission point", "reception point", "cell", "sector", "cell group", "carrier", "component carrier", and the like may be used interchangeably. The terms macrocell, microcell, femtocell, picocell, and the like are also sometimes used to refer to a base station.

The base station can accommodate one or more (e.g., three) cells. When a base station accommodates a plurality of cells, the entire coverage area of the base station can be divided into a plurality of smaller areas, and each of the smaller areas can also provide communication services through a base station subsystem (for example, an indoor small base station (RRH: remote Radio Head (remote radio head)), and the term "cell" or "sector" refers to a part or the entire coverage area of at least one of a base station and a base station subsystem that performs communication services within the coverage area.

In the present disclosure, terms such as "Mobile Station", "terminal", "UE (User Equipment)", and "terminal" may be used interchangeably.

For mobile stations, those skilled in the art are sometimes referred to by the following terms: a subscriber station, mobile unit (mobile unit), subscriber unit, wireless unit, remote unit, mobile device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, or some other suitable terminology.

At least one of the base station and the mobile station may be referred to as a transmitting apparatus, a receiving apparatus, a communication apparatus, or the like. At least one of the base station and the mobile station may be a device mounted on the mobile body, the mobile body itself, or the like. The mobile body may be a vehicle (e.g., an automobile, an airplane, etc.), a mobile body that moves unmanned (e.g., an unmanned aerial vehicle, an autopilot, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station also includes a device that does not necessarily move during a communication operation. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things: internet of things) device of a sensor or the like.

In addition, the base station in the present disclosure may be replaced with a terminal. For example, the various aspects and embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a terminal is replaced with communication between a plurality of terminals 20 (for example, D2D (Device-to-Device) and V2X (Vehicle-to-Everything system) may be also called as Device-to-Device), and in this case, the terminal 20 may have the function of the base station 10 described above.

Likewise, the terminals in the present disclosure may be replaced with base stations. In this case, the base station may have the functions of the terminal.

The terms "determining" and "determining" used in the present disclosure may include various operations. The "judgment" and "determination" may include, for example, a matter in which judgment (determination), calculation (calculation), processing (processing), derivation (development), investigation (investigation), search (lookup up, search, inquiry) (for example, search in a table, database, or other data structure), confirmation (evaluation), or the like are regarded as a matter in which "judgment" and "determination" are performed. Further, "determining" and "deciding" may include a matter in which reception (e.g., reception of information), transmission (e.g., transmission of information), input (input), output (output), access (e.g., access of data in a memory) is performed as a matter in which "determining" and "deciding" are performed. Further, "judging" and "determining" may include the matters of performing a decision (resolving), a selection (selecting), a selection (setting), a establishment (establishing), a comparison (comparing), and the like as matters of performing "judging" and "determining". That is, the terms "determine" and "determining" may include what is considered to be any action. The "judgment (decision)" may be replaced by "assumption", "expectation", "consider", or the like.

The terms "connected," "coupled," or any variation of these terms are intended to refer to any direct or indirect connection or coupling between two or more elements, including the case where one or more intervening elements may be present between two elements that are "connected" or "coupled" to each other. The combination or connection of the elements may be physical, logical, or a combination of these. For example, "connection" may be replaced with "Access". As used in this disclosure, two elements may be considered to be "connected" or "joined" to each other using at least one of one or more wires, cables, and printed electrical connections, and as some non-limiting and non-inclusive examples, electromagnetic energy or the like having wavelengths in the wireless frequency domain, the microwave region, and the optical (both visible and invisible) region.

The reference signal may be simply RS (Reference Signal) or may be referred to as Pilot (Pilot) depending on the standard applied.

As used in this disclosure, the recitation of "according to" is not intended to mean "according to" unless explicitly recited otherwise. In other words, the term "according to" means "according to only" and "according to at least" both.

Any reference to elements referred to using "1 st", "2 nd", etc. as used in this disclosure also does not entirely define the number or order of these elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, references to elements 1 and 2 do not indicate that only two elements can be taken or that in any form element 1 must precede element 2.

The "unit" in the configuration of each device may be replaced with "part", "circuit", "device", or the like.

Where the terms "include", "comprising" and variations thereof are used in this disclosure, these terms are intended to be inclusive in the same sense as the term "comprising". Also, the term "or" as used in this disclosure means not exclusive or.

A radio frame may be made up of one or more frames in the time domain. In the time domain, one or more of the frames may be referred to as subframes. A subframe may further be composed of one or more slots in the time domain. The subframes may also be a fixed length of time (e.g., 1 ms) independent of the parameter set (numerology).

The parameter set may be a communication parameter applied to at least one of transmission and reception of a certain signal or channel. The parameter set may represent, for example, at least one of a subcarrier spacing (SCS: subCarrier Spacing), a bandwidth, a symbol length, a cyclic prefix length, a transmission time interval (TTI: transmission Time Interval), a number of symbols per TTI, a radio frame structure, a specific filtering process performed by the transceiver in a frequency domain, a specific windowing process performed by the transceiver in a time domain, and the like.

A slot may be formed in the time domain from one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing: orthogonal frequency division multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access: single carrier frequency division multiple access) symbols, etc.). A slot may be a unit of time based on a set of parameters.

A slot may contain multiple mini-slots. Each mini-slot may be made up of one or more symbols in the time domain. In addition, the mini-slot may also be referred to as a sub-slot. Mini-slots may be made up of a fewer number of symbols than slots. PDSCH (or PUSCH) transmitted in units of time greater than the mini-slot may be referred to as PDSCH (or PUSCH) mapping type (type) a. PDSCH (or PUSCH) transmitted using mini-slots may be referred to as PDSCH (or PUSCH) mapping type (type) B.

The radio frame, subframe, slot, mini-slot, and symbol each represent a unit of time when a signal is transmitted. The radio frame, subframe, slot, mini-slot, and symbol may each use corresponding other designations.

For example, 1 subframe may also be referred to as a transmission time interval (TTI: transmission Time Interval), a plurality of consecutive subframes may also be referred to as TTIs, and 1 slot or 1 mini slot may also be referred to as TTIs. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in the conventional LTE, may be a period (e.g., 1-13 symbols) shorter than 1ms, or may be a period longer than 1 ms. In addition, a unit indicating a TTI may be called a slot, a mini-slot, or the like, instead of a subframe. In addition, 1 slot may also be referred to as a unit time. The unit time may be different for each cell according to the parameter set.

Here, TTI refers to, for example, a scheduled minimum time unit in wireless communication. For example, in the LTE system, the base station performs scheduling for allocating radio resources (bandwidth, transmission power, and the like that can be used in each terminal 20) to each terminal 20 in TTI units. In addition, the definition of TTI is not limited thereto.

The TTI may be a transmission time unit of a data packet (transport block), a code block, a codeword, or the like after channel coding, or may be a processing unit such as scheduling or link adaptation. In addition, when a TTI is given, the time interval (e.g., number of symbols) in which a transport block, a code block, a codeword, etc. is actually mapped may be shorter than the TTI.

In addition, in the case where 1 slot or 1 mini slot is referred to as a TTI, more than one TTI (i.e., more than one slot or more than one mini slot) may constitute a minimum time unit of scheduling. Further, the number of slots (mini-slots) constituting the minimum time unit of the schedule can be controlled.

A TTI having a time length of 1ms may also be referred to as a normal TTI (TTI in LTE rel.8-12), normal TTI (normal TTI), long TTI (long TTI), normal subframe (normal subframe), long (long) subframe, slot, etc. A TTI that is shorter than a normal TTI may also be referred to as a shortened TTI, a short TTI (short TTI), a partial or fractional TTI, a shortened subframe, a short (short) subframe, a mini-slot, a sub-slot, a slot, etc.

In addition, for long TTIs (long TTIs) (e.g., normal TTIs, subframes, etc.), a TTI having a time length exceeding 1ms may be substituted, and for short TTI (short TTI) (e.g., shortened TTI, etc.), a TTI having a TTI length less than the long TTI (long TTI) and having a TTI length of 1ms or more may be substituted.

A Resource Block (RB) is a resource allocation unit of a time domain and a frequency domain, in which one or more consecutive subcarriers (subcarriers) may be included. The number of subcarriers contained in the RB may be the same regardless of the parameter set, for example, 12. The number of subcarriers included in the RB may also be determined according to the parameter set.

Further, the time domain of the RB may contain one or more symbols, and may be 1 slot, 1 mini slot, 1 subframe, or 1TTI in length. A 1TTI, a 1 subframe, etc. may each be composed of one or more resource blocks.

In addition, one or more RBs may also be referred to as Physical resource blocks (PRB: physical RBs), subcarrier groups (SCG: sub-Carrier groups), resource element groups (REG: resource Element Group), PRB pairs, RB peering.

Furthermore, a Resource block may also be composed of one or more Resource Elements (REs). For example, 1RE may be a radio resource region of 1 subcarrier and 1 symbol.

A Bandwidth Part (BWP: bandwidth Part) (which may also be referred to as partial Bandwidth, etc.) may represent a subset of consecutive common RBs (common resource blocks: common resource blocks) for a certain parameter set in a certain carrier. Here, the common RB may be determined by an index of the RB with reference to a common reference point of the carrier. PRBs may be defined in a certain BWP and numbered within the BWP.

BWP may include BWP for UL (UL BWP) and BWP for DL (DL BWP). One or more BWP may be set for the UE within the 1 carrier.

At least one of the set BWP may be active, and a case where the UE transmits and receives a predetermined signal/channel outside the active BWP may not be envisaged. In addition, "cell", "carrier", etc. in the present disclosure may be replaced with "BWP".

The structure of the radio frame, subframe, slot, mini slot, symbol, etc. described above is merely an example. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of mini-slots included in a slot, the number of symbols and RBs included in a slot or mini-slot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the Cyclic Prefix (CP) length, and the like may be variously changed.

In the present disclosure, for example, where an article is added by translation as in a, an, and the in english, the present disclosure may also include a case where a noun following the article is in plural.

In the present disclosure, the term "a and B are different" may also mean that "a and B are different from each other". In addition, the term may mean that "a and B are different from C, respectively. The terms "separate," coupled, "and the like may also be construed as" different.

The various forms and embodiments described in this disclosure may be used alone, in combination, or switched depending on the implementation. Note that the notification of the predetermined information (for example, the notification of "X") is not limited to being explicitly performed, and may be performed implicitly (for example, the notification of the predetermined information is not performed).

The present disclosure has been described in detail above, but it should be clear to those skilled in the art that the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure can be implemented as modifications and variations without departing from the spirit and scope of the present disclosure as defined by the claims. Accordingly, the description of the present disclosure is intended to be illustrative, and not in any limiting sense.

Description of the reference numerals

10: a base station;

110: a transmitting unit;

120: a receiving section;

130: a setting unit;

140: a control unit;

20: a terminal;

210: a transmitting unit;

220: a receiving section;

230: a setting unit;

240: a control unit;

1001: a processor;

1002: a storage device;

1003: an auxiliary storage device;

1004: a communication device;

1005: an input device;

1006: and an output device.

Claims

1. A terminal, wherein the terminal has:

2. The terminal of claim 1, wherein,

3. The terminal of claim 2, wherein,

4. A terminal according to any one of claims 1 to 3, wherein,

5. The terminal of claim 4, wherein,

6. A communication method performed by a terminal, the communication method having the steps of:

receiving information related to a second band within the first band;

a shared channel of the first band including system information is received.