CN114097285A

CN114097285A - Terminal and wireless communication method

Info

Publication number: CN114097285A
Application number: CN201980098339.0A
Authority: CN
Inventors: 吉冈翔平; 高桥优元; 永田聪; 王理惠
Original assignee: NTT Docomo Inc
Current assignee: NTT Docomo Inc
Priority date: 2019-07-11
Filing date: 2019-07-11
Publication date: 2022-02-25
Also published as: WO2021005803A1

Abstract

The mode of the terminal of the present disclosure includes: a transmitting unit configured to transmit at least one of an uplink shared channel and an uplink reference signal; and a control unit configured to perform different transmission operations based on a type of the uplink shared channel when the uplink shared channel and the uplink reference signal are set or allocated to the same resource.

Description

Terminal and wireless communication method

Technical Field

The present disclosure relates to a terminal and a wireless communication method in a next generation mobile communication system.

Background

In a Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) is standardized for the purpose of further high data rate, low latency, and the like (non-patent document 1). In addition, LTE-Advanced (3GPP rel.10-14) is standardized for the purpose of further increasing the capacity and the height of LTE (Third Generation Partnership Project (3GPP)) versions (Release (Rel.))8 and 9).

Successor systems to LTE (e.g., also referred to as a 5th generation mobile communication system (5G)), 5G + (plus), New Radio (NR), 3GPP rel.15 and beyond) are also being studied.

In a conventional LTE system (e.g., 3GPP rel.8-14), a User terminal (User Equipment (UE)) controls reception of a Downlink Shared Channel (e.g., a Physical Downlink Shared Channel) based on Downlink Control Information (also referred to as Downlink Control Information (DCI), DL assignment, and the like) from a base station. The user terminal controls transmission of an Uplink Shared Channel (e.g., a Physical Uplink Shared Channel) based on DCI (also referred to as UL grant).

Documents of the prior art

Non-patent document

Non-patent document 1: 3GPP TS 36.300V8.12.0 "Evolved Universal Radio Access (E-UTRA) and Evolved Universal Radio Access Network (E-UTRAN); (ii) an Overall description; stage 2(Release 8) ", 4 months 2010

Disclosure of Invention

Problems to be solved by the invention

In future wireless Communication systems (e.g., 5G or NR), a plurality of use cases with different requirements (requirements) such as high speed and large capacity (e.g., enhanced Mobile broadband (eMBB)), an Ultra-large number of terminals (e.g., large-scale Machine Type Communication (MTC)), Ultra-high reliability and Low delay (e.g., Ultra-Reliable and Low-Latency Communication (URLLC)), etc. are assumed.

In such a future wireless communication system, it is assumed that a plurality of pieces of data (for example, downlink shared channels) having different requirements are transmitted to the same UE or UEs. Alternatively, it is contemplated that a plurality of data (e.g., uplink shared channel) having different requirements are transmitted from the same UE or UEs.

In this case, it is also considered that a plurality of data and reference signals having different requirements collide with each other (for example, are set to the same resource). However, it is not sufficiently studied how to control transmission or reception of data (or at least one of a channel and a signal) and a reference signal, in which collision occurs, in such a case.

Therefore, an object of the present disclosure is to provide a terminal and a wireless communication method capable of appropriately transmitting or receiving a plurality of data items having different requirements.

Means for solving the problems

A terminal according to an aspect of the present disclosure includes: a transmitting unit configured to transmit at least one of an uplink shared channel and an uplink reference signal; and a control unit configured to perform different transmission operations based on a type of the uplink shared channel when the uplink shared channel and the uplink reference signal are set or allocated to the same resource.

ADVANTAGEOUS EFFECTS OF INVENTION

According to one embodiment of the present disclosure, transmission or reception of a plurality of data items having different requirements can be performed appropriately.

Drawings

Fig. 1A and 1B are diagrams illustrating an example of collision between a channel and a reference signal.

Fig. 2A and 2B are diagrams illustrating an example of a mapping operation in the case where a DL channel and a DL reference signal collide with each other.

Fig. 3A and 3B are diagrams illustrating an example of a mapping operation in the case where the UL channel and the UL reference signal collide with each other.

Fig. 4 is a diagram showing an example of a schematic configuration of a radio communication system according to an embodiment.

Fig. 5 is a diagram showing an example of the configuration of a base station according to an embodiment.

Fig. 6 is a diagram showing an example of the configuration of a user terminal according to an embodiment.

Fig. 7 is a diagram showing an example of hardware configurations of a base station and a user terminal according to an embodiment.

Detailed Description

(DL data Allocation)

DL data (e.g., DL-SCH) is mapped to a specific allocation resource (e.g., PDSCH) and transmitted. The specific allocation resource may be notified from the network (e.g., a base station) to the UE by using at least one of downlink control information (e.g., DCI) and higher layer signaling.

In a conventional system (e.g., rel.15), a PDSCH used for transmission of DL data is allocated to resources other than a demodulation Reference Signal (e.g., DM-RS), a channel state information Reference Signal (e.g., CSI-RS), a Phase Tracking Reference Signal (PTRS), a Cell-specific Reference Signal (e.g., Cell-specific Reference (CRS)), and a synchronization Signal block (e.g., SS/PBCH block). The CSI-RS may also be at least one of a Periodic CSI-RS (Periodic CSI-RS), a semi-continuous non-Zero-power CSI-RS (semi-continuous non-Zero-power CSI-RS), and a Zero-power CSI-RS (Zero-power CSI-RS).

Fig. 1A shows an example of mapping of DL data (PDSCH) and CSI-RS. Here, the pdsch (dl sps) is transmitted in a 2-slot cycle, and the CSI-RS is transmitted in a 5-slot cycle. In fig. 1A, in slot #6, a resource for a PDSCH and a resource for a DL reference signal (e.g., CSI-RS) are repeated (or also referred to as a collision (hereinafter referred to as "collision") and a collision (collision)).

In such a case, the PDSCH is allocated avoiding the CSI-RS resources as described above. The UE may also perform reception processing by allocating a PDSCH to a resource other than the resource for the CSI-RS.

However, in future wireless Communication systems (e.g., 5G or NR), a plurality of use cases with different requirements (requirements) such as high speed and large capacity (e.g., enhanced Mobile broadband (eMBB)), an ultra-large number of terminals (e.g., large Machine Type Communication), ultra-high reliability and Low Latency (e.g., ultra-Reliable and Low Latency Communication (urllc)), and the like are assumed.

In this case, a case is also assumed where a PDSCH and a DL reference signal (for example, CSI-RS) that correspond to a transmission type (for example, URLLC) that requires conditions of ultra-high reliability and low delay and that has a high priority collide. In such a case, if a PDSCH of a transmission type having a high priority is allocated to a resource avoiding CSI-RS resources according to a mapping rule of an existing system and transmitted, a coding rate (coding rate) may be increased, and the requirement may not be satisfied.

It is also considered that the network (e.g., base station) side increases the allocation resources of the PDSCH in consideration of the CSI-RS in the slot to which the CSI-RS is allocated. However, when the PDSCH is transmitted by applying semi-persistent scheduling, repeated transmission, or the like, scheduling efficiency may be reduced.

(UL data Allocation)

UL data (e.g., UL-SCH) is mapped to a specific allocation resource (e.g., PUSCH) and transmitted. The specific allocation resource may be notified from the network (e.g., a base station) to the UE by using at least one of downlink control information (e.g., DCI) and higher layer signaling.

In a conventional system (e.g., rel.15), a PUSCH used for transmission of UL data is allocated to resources other than a demodulation Reference Signal (e.g., DM-RS) and a Phase Tracking Reference Signal (PTRS). In addition, when the PUSCH and the SRS are allocated to the same slot, the SRS is controlled to be transmitted after the transmission of the PUSCH.

Fig. 1B shows an example of mapping of UL data (PUSCH) and SRS. Here, a case is shown in which repeated transmission (here, the number of repetitions is 4) by mini-slot (for example, a specific number of symbols) is applied to the PUSCH, and the SRS is transmitted in a period of 5 slots. In fig. 1B, in slot #11, a resource for PUSCH and a resource for UL reference signal (for example, SRS) are repeated (or also referred to as collision (hereinafter referred to as "collision") and collision (collision)).

In such a case, since collision between the SRS and the PUSCH is not allowed or supported, there is a possibility that allocation (or scheduling) of the PUSCH transmitted in the same slot as the SRS cannot be appropriately performed. Since the UE does not assume that the SRS resource and the PUSCH resource collide with each other, it is not possible to perform the reception process appropriately.

In this case, a case is also assumed where PUSCH and UL reference signals (for example, SRS) corresponding to a transmission type (for example, URLLC) of high priority that requires conditions of high reliability and low delay collide. In this case, according to the mapping rule of the conventional system, collision between the PUSCH of the transmission type having a high priority and the SRS is not allowed, and therefore, there is a possibility that the PUSCH cannot be appropriately transmitted.

It is also contemplated that the network (e.g., base station) side controls the allocation of the allocation (e.g., PUSCH) so that the SRS and PUSCH do not collide. However, in this case, there is a possibility that a delay occurs in the transmission of the PUSCH and the requirement condition is not satisfied.

As one aspect of the present invention, the inventors of the present invention have focused on a case where transmission of a DL channel of a transmission type (for example, at least one of a PDSCH and a PDCCH) having a high priority among NRs collides with another signal (for example, a DL reference signal), and have conceived that a reception operation is controlled based on the type of a downlink channel in such a case.

Alternatively, as another aspect of the present invention, the inventors of the present invention have focused on a case where transmission of a UL channel of a transmission type (for example, at least one of PUSCH and PUCCH) having a high priority among NRs collides with another signal (for example, UL reference signal), and have conceived that in such a case, a transmission operation is controlled based on the type of the UL channel.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The following first to second embodiments may be used alone or in combination of at least 2.

The following scheme can be applied to any of transmission and reception to which repetitive transmission (or repetition) is applied, transmission and reception to which repetitive transmission (or the number of repetitions is 1) is not applied, transmission and reception by semi-persistent scheduling, and transmission and reception to which semi-persistent scheduling is not applied.

Furthermore, the following scheme may be applied to a collision between a channel and a reference signal transmitted by the same UE (intra-UE overlapping case), and may also be applied to a collision between a channel and a reference signal transmitted by different UEs (inter-UE overlapping case).

(first mode)

In the first aspect, a case where a DL channel collides with a DL reference signal will be described.

In the following description, the DL channel may be interpreted as a downlink shared channel transmission (e.g., PDSCH transmission) and a downlink control channel monitoring opportunity (PDCCH monitoring opportunity). In the following description, CSI-RS is given as an example of the DL reference signal, but the DL reference signal is not limited to this, and may be PT-RS, CRS, or SS/PBCH block (SS/PBCH block). In addition, a DL reference signal may also be included in the DL channel.

Note that the DL channel may collide with the DL reference signal, and the DL channel may be set or allocated to the same resource (for example, at least one of a time resource and a frequency resource) as the DL reference signal. Time resources may also be interpreted as symbols.

In the case where the DL channel collides with the DL reference signal, the allocation rule (or mapping rule) or UE action of the DL channel and the DL reference signal may be separately controlled (or supported) based on the type (or transmission type) of the DL channel. In the following description, a first type having a high priority and a second type having a lower priority than the first type are given as examples of types of DL channels, but the types of DL channels are not limited to 2 types.

The first type may correspond to a particular traffic type (e.g., URLLC transmissions), and the second type may correspond to transmissions other than the first type (e.g., transmissions that do not correspond to URLLC transmissions).

For example, the first type may also be a transmission scheduled with a high priority. The priority may also be decided based on at least one of an RNTI, a DCI format, a DCI field, a control resource set, and a search space that scrambles the CRC. For example, the UE may determine the priority (or transmission type) of the DL channel based on at least one of an RNTI, a DCI format, a DCI field, a control resource set, and a search space utilized in the DL channel.

Alternatively, the first type DL channel may be set by higher layer signaling or the like. Alternatively, a specific MCS table may be associated with the first type of DL channel. For example, the UE may determine that the DL channel of the MCS table in which a coding rate equal to or less than a specific value is set (for example, the minimum or maximum coding rate is equal to or less than the specific value) is the first type.

For example, the second type may also be a transmission scheduled at a lower priority than the first type. The priority may also be decided based on at least one of an RNTI, a DCI format, a DCI field, a control resource set, and a search space that scrambles the CRC. For example, the UE may determine the priority (or transmission type) of the DL channel based on at least one of an RNTI, a DCI format, a DCI field, a control resource set, and a search space utilized in the DL channel.

Alternatively, the second type DL channel may be set by higher layer signaling or the like. Alternatively, a specific MCS table may be associated with the second type DL channel. For example, the UE may determine that the DL channel of the MCS table in which a coding rate of a specific value or more is specified (for example, the minimum or maximum coding rate is a specific value or more) is set is the second type.

When the DL channel collides with the DL reference signal, the allocation rules of the first type DL channel and the second type DL channel, or the UE may perform the receiving operation on the first type DL channel and the second type DL channel separately.

< first type >

The UE may apply at least one of the following options 1-1 to 1-6 when a DL channel (e.g., at least one of a PDSCH and a PDCCH monitoring opportunity) is set or allocated to the same resource (e.g., the same symbol) as the DL reference signal and the DL channel is of the first type (or the first type DL channel). In the following description, a DL channel may be interpreted as a DL channel and a DL reference signal (e.g., DMRS corresponding to the DL channel) included in the DL channel.

[ options 1-1]

Resources of DL reference signals can also be utilized for DL channels and all DL reference signals are discarded (drop). The UE may also transmit a DL channel (e.g., at least one of DL data, DMRS, and DCI) using the DL reference signal resource in order to discard the DL reference signal (see fig. 2A).

In fig. 2A, a case where a first type DL channel (e.g., DL SPS) is transmitted with a 2-slot cycle and a DL reference signal (e.g., CSI-RS) is transmitted with a 5-slot cycle is shown. In fig. 2A, in slot #6, resources for a DL channel and resources for a DL reference signal are repeated (or also referred to as collision (hereinafter referred to as "collision") and collision (collision)). In such a case, the DL reference signal is not transmitted (discarded), but the DL channel of the first type is transmitted using the resources of the DL reference signal.

In this way, by transmitting (or allocating) the first type DL channel in preference to the DL reference signal, it is possible to appropriately transmit a DL signal that requires ultra-high reliability and low delay, and to suppress deterioration of communication quality.

[ options 1-2]

The DL channel may be mapped to the resources for the DL channel after the DL reference signal is mapped to the resources for the DL reference signal. The UE maps the DL reference signal to the set or allocated resource, but it is also conceivable that the DL reference signal is punctured in the DL channel resource.

In this way, by transmitting (or allocating) the first type DL channel in preference to the DL reference signal, it is possible to appropriately transmit a DL signal that requires ultra-high reliability and low delay, and to suppress deterioration of communication quality. Further, since the DL reference signal can be transmitted in the resource for the DL reference signal that does not collide with the resource for the DL channel, the communication quality can be improved.

[ options 1-3]

The resources of the DL reference signal are used for the DL channel, but the DL reference signal (e.g., remaining CSI-RS) may be transmitted. The UE maps a DL channel (for example, at least one of DL data, DMRS, and DCI) to the set or allocated resource, but it is also conceivable that the DL channel is punctured in the DL reference signal resource.

For example, when the number of resources to which DL reference signals are set or allocated is small relative to the number of resources to which DL channels are set or allocated, even if DL reference signals are transmitted using the resources of the DL channels, the DL channel transmission is less affected. In such a case, by transmitting both the DL channel and the DL reference signal, the communication quality can be improved.

[ options 1-4]

It may also be controlled such that at least the resources of the DL reference signal are not utilized for the DL channel. That is, the DL channel may be controlled and allocated in addition to the resources of the DL reference signal. The UE may also assume to map a DL channel (e.g., at least one of DL data, DMRS, and DCI) in resources other than resources of a DL reference signal. In other words, the UE may also be conceived to apply rate matching.

For example, when the number of resources to which the DL reference signal is set or allocated is small relative to the number of resources to which the DL channel is set or allocated, even if the DL channel is allocated while avoiding the resources of the DL reference signal, it is possible to suppress an increase in the coding rate. In such a case, by transmitting both the DL channel and the DL reference signal, the communication quality can be improved.

[ options 1-5]

It may also be controlled such that at least the symbols of the DL reference signal are not utilized for the DL channel. That is, the DL channel may be controlled to be allocated in addition to the symbol to which the DL reference signal is allocated. The UE may also contemplate that DL channels (e.g., at least one of DL data, DMRS, and DCI) set or allocated to resources (e.g., symbols) to which DL reference signals are allocated are mapped (e.g., deferred, delayed (postpone)) to different symbols. The different symbols may be defined by the specification, or may be notified to the UE from the base station through at least one of higher layer signaling and DCI.

By transmitting both the DL channel and the DL reference signal, the communication quality can be improved.

[ options 1-6]

Which of the above options 1-1 to 1-5 is applied may also be decided based on a specific condition. The UE may also decide to receive operation based on certain conditions in case of collision of the DL channel with the DL reference signal.

The specific condition may also be information notified from a network (e.g., a base station), a coding rate of a DL channel, an overhead-related parameter (e.g., N)^PRB _oh) And at least one of the number of ports of the DL reference signal.

The base station may notify the UE of the mapping rule or the reception operation of the UE when the DL channel and the DL reference signal collide with each other by using higher layer signaling or the like. The UE controls reception processing of the DL channel and the DL reference signal based on information notified from the base station. The mapping rule or the applied reception action may be notified for each type of DL channel, or may be notified only for a specific type (for example, the first type).

The mapping rule and the UE reception operation may be determined based on a coding rate (coding rate) of the DL channel. For example, in the case where the coding rate of the DL channel (or the coding rate of the DL channel in the case of performing transmission of the DL reference signal) becomes higher than a specific value, the option 1-1, 1-2, or 1-5 may also be applied. On the other hand, when the code rate of the DL channel (or the code rate of the DL channel in the case of transmitting the DL reference signal) is equal to or less than the specific value, options 1 to 4 can be applied.

May also be based on overhead related parameters (e.g., N) for PDSCH^PRB _oh) To decide the mapping rule or the receiving action of the UE. Overhead related parameters (e.g., N) for PDSCH^PRB _oh) Representing overhead from other signals (e.g., CSI-RS, PT-RS, etc.). From N^PRB _ohNumber of Resource Elements (REs), N, representing other signals in PRB^PRB _ohOr may be a value set by a higher layer parameter (configure). E.g. N^PRB _ohIs the overhead represented by the higher layer parameter (Xoh-PDSCH) and may be any of 0, 6, 12 or 18. In the case where Xoh-PDSCH is not set (notified) to the UE, Xoh-PDSCH may be set to 0. The UE may also be based on N^PRB _ohTo determine the TBS, etc.

For example, overhead related parameters (e.g., N) for PDSCH may also be used^PRB _oh) In the case of becoming larger than a specific value, the option 1-1, 1-2 or 1-5 is applied. On the other hand, parameters related to overhead (e.g., N) with respect to PDSCH may also be used^PRB _oh) When the value is less than or equal to the specific value, the options 1 to 3 or 1 to 4 are applied.

The mapping rule or the receiving action of the UE may also be decided based on the port number of the DL reference signal, e.g., CSI-RS port (CSI-RS port). For example, in the case where the number of ports of the DL reference signal becomes more than a specific value, the options 1-1, 1-2, or 1-5 may also be applied. On the other hand, when the number of ports of the DL reference signal is equal to or less than a specific value, the option 1-2 or 1-4 may be applied.

< second type >

The UE may apply at least one of the following options 1-a to 1-B when a DL channel (e.g., at least one of a PDSCH and a PDCCH monitoring opportunity) is set or allocated to the same resource (e.g., the same symbol) as the DL reference signal and the DL channel is of the second type (or the second type DL channel).

[ option 1-A ]

It may be controlled such that at least the resources of the DL reference signal are utilized for a DL channel (e.g., at least one of PDCCH and PDSCH) including the DMRS. That is, the PDCCH and DMRS, or PDSCH and DMRS may be controlled to be allocated in addition to the resources of the DL reference signal. The UE may also conceivably map DCI (or PDCCH) and DMRS, or DL data (or PDSCH) and DMRS in resources other than resources of DL reference signals. In other words, the UE may be conceived to apply rate matching (refer to fig. 2B).

In fig. 2B, a case where a DL channel of the second type (e.g., DL SPS) is transmitted with a 2-slot cycle and a DL reference signal (e.g., CSI-RS) is transmitted with a 5-slot cycle is shown. In fig. 2B, in slot #6, resources for a DL channel and resources for a DL reference signal are repeated (or also referred to as collision (hereinafter referred to as "collision") and collision (collision)). In this case, a DL channel including a DMRS (e.g., PDCCH and DMRS, or PDSCH and DMRS) is allocated while avoiding resources of DL reference signals, and a DL channel and DL reference signals of the second type are transmitted.

In this way, when the DL channel of the second type having a low priority and the DL reference signal collide with each other in the specific resource, the measurement of the channel quality can be continued by prioritizing the transmission of the DL reference signal in the specific resource.

[ option 1-B ]

It may also be controlled such that at least resources of the DL reference signal are not utilized for the DL channel (e.g., at least one of the PDCCH and PDSCH), and the DL reference signal does not overlap with the same resources (e.g., Resource Elements (REs)) as the DMRS. That is, the PDCCH or PDSCH is allocated except for the resources of the DL reference signal and is controlled so that the DMRS does not overlap with the DL reference signal.

The UE may also envisage mapping DCI (or PDCCH) or DL data (or PDSCH) on resources other than those of the DL reference signal. Furthermore, the UE may also be conceived to receive the DL reference signal and the DMRS corresponding to the DL channel of the second type (PDCCH or PDSCH) not through the same resource (e.g., RE).

As shown in fig. 2A and 2B, when a DL channel collides with a DL reference signal, a mapping rule or a reception operation of a UE is controlled based on the type of the DL channel, so that reception processing can be flexibly performed according to a requirement. This can suppress deterioration of communication quality.

(second mode)

In the second mode, a case where the UL channel collides with the UL reference signal will be described.

In the following description, the UL channel may be replaced with an uplink shared channel (e.g., PUSCH) and an uplink control channel (e.g., PUCCH). In addition, PUCCH may be replaced with UCI. In the following description, a Sounding Reference Signal (SRS) is given as an example of the UL reference signal, but the UL reference signal is not limited thereto and may be a PT-RS. In addition, the UL channel may include a UL reference signal.

The UL channel may collide with the UL reference signal when the UL channel is set or scheduled to the same resource (for example, at least one of a time resource and a frequency resource) as the UL reference signal. Time resources may also be interpreted as symbols.

In the case where the UL channel collides with the UL reference signal, the allocation rule (or mapping rule) or UE action of the UL channel and the UL reference signal may be separately controlled (or supported) based on the type of the UL channel. In the following description, a first type having a high priority and a second type having a lower priority than the first type are given as examples of types of UL channels, but the types of UL channels are not limited to 2 types.

The first type may also correspond to a particular traffic type (e.g., URLLC transmissions), and the second type may also correspond to transmissions other than the first type (e.g., transmissions that do not correspond to URLLC transmissions). For example, the first type or the second type may be determined based on the method shown in the first mode.

For example, when the UL channel collides with the UL reference signal, the allocation rules of the first type UL channel and the second type UL channel, or the transmission operation of the UE to the first type UL channel and the second type UL channel may be performed separately.

< first type >

The UE may apply at least one of the following options 2-1 to 2-6 when an UL channel (e.g., at least one of PUSCH and PUCCH) is set or scheduled with the same resource (e.g., the same symbol) as the UL reference signal and the UL channel is of the first type (or the first type UL channel). In the following description, the UL channel may be interpreted as an UL channel and an UL reference signal (e.g., DMRS corresponding to the UL channel) included in the UL channel.

[ option 2-1]

Resources of the UL reference signal may also be utilized for the UL channel, and all UL reference signals may also be discarded. The UE may also perform control such that the UL reference signal is discarded and the UL channel (e.g., at least one of UL data, DMRS, and UCI) is transmitted using the resources for the UL reference signal (see fig. 3A).

Fig. 3A shows a case where a first type UL channel (e.g., repeated transmission of PUSCH (repetition factor 4)) is transmitted with a specific number of symbols or on a mini-slot basis, and a UL reference signal (e.g., SRS) is transmitted with a period of 5 slots. In fig. 3A, in slot #11, resources for the UL channel and resources for the UL reference signal are repeated (or also referred to as collision (hereinafter referred to as "collision") and collision (collision)). In this case, the UE may also transmit the first type of UL channel using the resources of the UL reference signal instead of transmitting (discarding) the UL reference signal.

In this way, by transmitting (or allocating) the first type UL channel in preference to the UL reference signal, it is possible to appropriately transmit the UL signal that requires ultra-high reliability and low delay, and to suppress deterioration of communication quality.

[ options 2-2]

The UL channel may also be mapped to resources for the UL channel after the UL reference signal is mapped to the resources for the UL reference signal. The UE may also assume that the UL reference signal is punctured in the resources for the UL channel although the UL reference signal is mapped to the set or allocated resources.

In this way, by transmitting (or allocating) the first type UL channel in preference to the UL reference signal, it is possible to appropriately transmit the UL signal that requires ultra-high reliability and low delay, and to suppress deterioration of communication quality. Further, the UL reference signal can be transmitted in the DL reference signal resource that does not collide with the UL channel resource, and therefore, the communication quality can be improved.

[ options 2-3]

The resources of the UL reference signal are utilized for the UL channel, but the UL reference signal (e.g., SRS) may also be transmitted. The UE maps an UL channel (e.g., at least one of UL data, DMRS, and UCI) to the set or scheduled resources, but may also perform control such that the UL channel is punctured in the resources for UL reference signals.

For example, when the resources to which the UL reference signal is set or allocated are small relative to the resources to which the UL channel is set or scheduled, even if the UL reference signal is transmitted using the resources of the UL channel, the transmission of the UL channel is less affected. In such a case, by transmitting both the UL channel and the UL reference signal, the communication quality can be improved.

[ options 2-4]

It may also be controlled such that at least the resources of the UL reference signal are not utilized for the UL channel. That is, the UL channel may be allocated by control in addition to the resources of the UL reference signal. The UE may also control such that an UL channel (e.g., at least one of UL data, DMRS, and UCI) is mapped to resources other than resources of the UL reference signal. In other words, the UE may also control such that rate matching is applied.

For example, when the resource to which the UL reference signal is set or allocated is small relative to the resource to which the UL channel is set or scheduled, even if the UL channel is allocated while avoiding the resource of the UL reference signal, it is possible to suppress an increase in the coding rate. In such a case, by transmitting both the UL channel and the UL reference signal, the communication quality can be improved.

[ options 2-5]

It may also be controlled such that at least symbols of the UL reference signal are not utilized for the UL channel. That is, the UL channel may be allocated by control other than the symbol to which the UL reference signal is allocated. The UE may also control such that an UL channel (e.g., at least one of UL data, DMRS, and UCI) set or scheduled for resources (e.g., symbols) to which UL reference signals are allocated is mapped (e.g., deferred, delayed (postpone)) to different symbols. The different symbols may be defined by the specification or may be notified to the UE from the base station through at least one of higher layer signaling and DCI.

By transmitting both the UL channel and the UL reference signal, the communication quality can be improved.

[ options 2-6]

Which of the above options 2-1 to 2-5 is applied may also be decided based on a specific condition. The UE may also decide the reception action based on certain conditions in case of collision of the UL channel with the UL reference signal.

The specific condition may also be information notified from a network (e.g., a base station), a coding rate of an UL channel, a parameter related to overhead (e.g., N)^PRB _oh) And at least one of the number of ports of the UL reference signal.

The base station may notify the UE of the mapping rule or the transmission operation of the UE when the UL channel and the UL reference signal collide with each other by using higher layer signaling or the like. The UE controls transmission processing of the UL channel and the UL reference signal based on the information notified from the base station. The mapping rule or the applied transmission action may be notified for each type of UL channel, or may be notified only for a specific type (for example, the first type).

The mapping rule and the UE transmission operation may be determined based on a coding rate (coding rate) of the UL channel. For example, the options 2-1, 2-2, or 2-5 may also be applied in the case where the coding rate of the UL channel (or the coding rate of the UL channel in the case where transmission of the UL reference signal is performed) becomes higher than a specific value. On the other hand, when the coding rate of the UL channel (or the coding rate of the UL channel in the case of transmitting the UL reference signal) is equal to or less than the specific value, options 2 to 4 may be applied.

Based on overhead related parameters (e.g., N) for PUSCH^PRB _oh) To decide the mapping rules or the receiving action of the UE. Overhead related parameters for PUSCH (e.g., N)^PRB _oh) Representing overhead from other signals (e.g., SRS, PT-RS, etc.). By N^PRB _ohNumber of Resource Elements (REs), N, representing other signals in PRB^PRB _ohOr may be a value set (configure) by a higher layer parameter. E.g. N^PRB _ohIs the opening represented by a higher layer parameter (Xoh-PUSCH)The pin may be any value of 0, 6, 12 or 18. When Xoh-PUSCH is not set (notified) to the UE, Xoh-PUSCH may be set to 0. The UE may also be based on N^PRB _ohDetermine TBS, etc.

For example, in terms of overhead related parameters for PUSCH (e.g., N)^PRB _oh) In the case of becoming larger than a specific value, options 2-1, 2-2, or 2-5 may also be applied. On the other hand, in terms of overhead-related parameters of PUSCH (e.g., N)<PRB>oh) is a specific value or less, options 2 to 3 or 2 to 4 can also be applied.

The mapping rule or the UE transmission action may also be decided based on the number of ports (e.g., SRS ports) of the UL reference signal. For example, in the case where the number of ports of the UL reference signal becomes greater than a certain value, the options 2-1, 2-2, or 2-5 may also be applied. On the other hand, when the number of ports of the UL reference signal is equal to or less than a specific value, options 2-3 or 2-4 may be applied.

< second type >

The UE may apply at least one of the following options 2-a to 2-D when a UL channel (e.g., at least one of PUSCH and PUCCH) is set or scheduled with the same resource (e.g., the same symbol) as the UL reference signal and the UL channel is of the second type (or the second type UL channel).

[ option 2-A ]

It may also be controlled such that at least the resources of the UL reference signal are not utilized for the UL channel containing the DMRS (e.g., at least one of PUCCH and PUSCH). That is, the PUCCH and DMRS, or the PUSCH and DMRS may be controlled and allocated in addition to the resources of the UL reference signal. The UE may also control such that UCI (or PUCCH) and DMRS or UL data (or PUSCH) and DMRS are mapped to resources other than resources of the UL reference signal. In other words, the UE may also control such that rate matching is applied (refer to fig. 3B).

Fig. 3B shows a case where the UL channel of the second type (e.g., repeated transmission of PUSCH (repetition factor 4)) is transmitted with a specific number of symbols or on a mini-slot basis, and the UL reference signal (e.g., SRS) is transmitted with a period of 5 slots. In fig. 3B, in slot #11, resources for the UL channel and resources for the UL reference signal are repeated (or also referred to as collision (hereinafter referred to as "collision") and collision (collision)). In such a case, the UL channel containing the DMRS (e.g., PUCCH and DMRS, or PUSCH and DMRS) is allocated (or scheduled) avoiding the resources of the UL reference signal, and the UE transmits the UL channel of the second type and the UL reference signal.

In this way, when the UL reference signal and the second type UL channel having a low priority collide with each other in the specific resource, the measurement of the channel quality can be continued by prioritizing the transmission of the UL reference signal in the specific resource.

[ option 2-B ]

It may also be controlled such that at least resources of the UL reference signal are not utilized for the UL channel (e.g., at least one of PUCCH and PUSCH), and the UL reference signal is not repeated with the same resources (e.g., Resource Elements (REs)) as the DMRS. That is, the control may be performed such that the PUCCH or PUSCH is allocated in addition to the resources of the UL reference signal, and the DMRS and the UL reference signal do not overlap.

The UE may control such that UCI (or PUCCH) or UL data (or PUSCH) is mapped to resources other than resources of the UL reference signal. Furthermore, the UE may also be conceived to not transmit the UL reference signal and the DMRS corresponding to the UL channel of the second type (PUCCH or PUSCH) through the same resource (e.g., RE).

[ option 2-C ]

Control may also be performed so that collision of the second type of UL channel with the UL reference signal does not occur. That is, when the UL channel of the second type collides with the UL reference signal, an error situation may be set. The base station may also control such that the UL channel of the second type and the UL reference signal do not collide. For example, the base station may control, when the PUSCH of the second type and the SRS are transmitted in the same slot, so that the SRS is allocated after the PUSCH of the second type and the DMRS corresponding to the PUSCH are transmitted.

In the case where the UL channel of the second type collides with the UL reference signal, the UE may determine that there is an error and perform control so that one or both of the transmissions are not performed.

[ option 2-D ]

When a collision between the UL channel and the UL reference signal occurs, the UE may perform control so as to discard one of the UL channel and the UL reference signal based on a priority set for each of the UL channel type and the UL reference signal type. The priority may be CSI for HARQ-ACK or SR > SRs > PUCCH, for example.

The UE may also perform control so that the SRs is dropped when the PUCCH or PUSCH having at least one of the HARQ-ACK and the SR collides with the SRs. Furthermore, the UE may also control so that the PUCCH is discarded when only the PUCCH having CSI collides with the SRS. In addition, the set priority is not limited thereto. The priority may be predefined by a specification, or may be set to the UE from the base station by higher layer signaling or the like.

(variants)

In the first and second aspects, the application options may be used separately according to the transmission conditions or the transmission method. For example, different options may be applied to the following cases where the transmission conditions or the transmission method are different.

< case 1: dynamic DL allocation and DL SPS >

In the first embodiment, different options (for example, any of options 1-1 to 1-6) may be used for the case of applying dynamic DL allocation and the case of applying DL SPS. For example, the UE may also utilize a first option (e.g., option 1-1) if dynamic DL allocation is applied and a second option (e.g., option 1-2) if DL SPS is applied. Of course, the options applicable to various situations are not limited thereto.

< case 2: PDSCH with corresponding DCI and PDSCH without corresponding DCI >

In the first aspect, different options (for example, any of options 1-1 to 1-6) may be used for a PDSCH (PDSCH with corresponding DCI)) in which corresponding DCI exists and a PDSCH (PDSCH without corresponding DCI) in which corresponding DCI does not exist. For example, the UE may use the first option for a PDSCH with corresponding DCI and use the second option for a PDSCH without corresponding DCI.

< case 3: applying and not applying repeatedly transmitted PDSCH >

In the first aspect, different options (for example, any of options 1-1 to 1-6) may be used between a case where repeated transmission (retransmission) of the PDSCH is applied and a case where repeated transmission of the PDSCH is not applied. For example, the UE may use the first option when applying the repeated transmission of the PDSCH and use the second option when not applying the repeated transmission of the PDSCH. In addition, the PDSCH may be replaced with PDCCH.

< case 4: dynamic UL Allocation and UL SPS >

In the second embodiment, different options (for example, any of options 2-1 to 2-6) may be used for the case where dynamic UL allocation is applied and the case where UL SPS is applied. For example, the UE may also utilize a first option (e.g., option 2-1) if dynamic UL allocation is applied and a second option (e.g., option 2-2) if UL SPS is applied. Of course, the options applicable to various situations are not limited thereto.

< case 5: PUSCH with corresponding DCI and PUSCH without corresponding DCI >

In the second aspect, different options (for example, any of options 2-1 to 2-6) may be used for a PUSCH (PUSCH with corresponding DCI)) in which corresponding DCI exists and a PUSCH (PUSCH without corresponding DCI) in which corresponding DCI does not exist. For example, the UE may use the first option for a PUSCH in which corresponding DCI exists, and use the second option for a PUSCH in which corresponding DCI does not exist. The PUSCH on which the corresponding DCI exists may be a PUSCH scheduled by the DCI, and the PUSCH on which the corresponding DCI does not exist may be a PUSCH based on a set grant that is not scheduled by the DCI.

< case 6: PUSCH to which repetitive transmission is applied and PUSCH to which repetitive transmission is not applied >

In the second aspect, different options (for example, any of options 2-1 to 2-6) may be used between a case where repeated transmission of the PUSCH is applied and a case where repeated transmission of the PUSCH is not applied. For example, the UE may use the first option when repeated transmission of the PUSCH is applied and use the second option when repeated transmission of the PUSCH is not applied. In addition, the PUSCH may be replaced with the PUCCH.

< case 7: CC for transmitting channel and reference signal >

In at least one of the first and second aspects, different options (e.g., any of options 1-1 to 1-6, and options 2-1 to 2-6) may be used when the first type of channel (e.g., a URLLC channel) and the reference signal are present in the same CC or cell, and when the first type of channel (e.g., a URLLC channel) and the reference signal are present in different CCs or cells. For example, the UE may also utilize the first option if the first type of channel and the reference signal are present in the same CC or cell and the second option if the first type of channel and the reference signal are present in different CCs or cells.

< case 8: frequency band for transmitting channel and reference signal >

In at least one of the first and second aspects, different options (e.g., any of options 1-6 and options 2-1-2-6) may be used when the first type channel (e.g., the URLLC channel) and the reference signal are present in the same frequency band (or frequency range) or when the first type channel (e.g., the URLLC channel) and the reference signal are present in different frequency bands. For example, the UE may also utilize the first option if the first type of channel and the reference signal exist in the same frequency band and utilize the second option if the first type of channel and the reference signal exist in different frequency bands.

< case 9: UE transmitting channel and reference Signal >

In at least one of the first and second aspects, different options (for example, any of options 1-1 to 1-6 and options 2-1 to 2-6) may be used when collisions between channels and reference signals occur between the same UE (intra-UE overlapping) and between different UEs (inter-UE overlapping). For example, the UE may use the first option when the collision between the channel and the reference signal is between the same UEs (inter-UE overlapping), and use the second option when the collision between the channel and the reference signal is between different UEs (inter-UE overlapping).

(Wireless communication System)

Hereinafter, the structure of a wireless communication system of an embodiment of the present disclosure will be described. In this wireless communication system, communication is performed using any one of or a combination of the wireless communication methods of the above-described embodiments of the present disclosure.

Fig. 4 is a diagram showing an example of a schematic configuration of a radio communication system according to an embodiment. The Radio communication system 1 may be a system that realizes communication by using Long Term Evolution (LTE) standardized by the Third Generation Partnership Project (3GPP), a New Radio (5G NR) of the fifth Generation mobile communication system, or the like.

In addition, the wireless communication system 1 may also support Dual Connectivity (Multi-RAT Dual Connectivity (MR-DC)) between a plurality of Radio Access Technologies (RATs). The MR-DC may include Dual connection of LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC))), Dual connection of NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC))), and the like.

In EN-DC, a base station (eNB) of LTE (E-UTRA) is a Master Node (MN), and a base station (gNB) of NR is a Slave Node (SN). In NE-DC, the base station of NR (gNB) is MN and the base station of LTE (E-UTRA) (eNB) is SN.

The wireless communication system 1 may also support Dual connection between a plurality of base stations within the same RAT (for example, Dual connection of a base station (gNB) in which both MN and SN are NR (NR-NR Dual Connectivity (NN-DC))).

The wireless communication system 1 may include: a base station 11 forming a macro cell C1 having a relatively wide coverage area, and base stations 12(12a to 12C) arranged in the macro cell C1 and forming a small cell C2 narrower than the macro cell C1. The user terminal 20 may also be located in at least one cell. The arrangement, number, and the like of each cell and user terminal 20 are not limited to the embodiments shown in the figures. Hereinafter,

base stations

11 and 12 will be collectively referred to as base station 10 without distinction.

The user terminal 20 may also be connected to at least one of the plurality of base stations 10. The user terminal 20 may use at least one of Carrier Aggregation (CA) and Dual Connectivity (DC) using a plurality of Component Carriers (CCs)).

Each CC may be included in at least one of the first Frequency band (Frequency Range 1(FR1))) and the second Frequency band (Frequency Range 2(FR 2))). Macro cell C1 may also be contained in FR1 and small cell C2 may also be contained in FR 2. For example, FR1 may be a frequency band of 6GHz or less (sub-6GHz), and FR2 may be a frequency band higher than 24GHz (above-24 GHz). The frequency bands, definitions, and the like of FR1 and FR2 are not limited to these, and FR1 may correspond to a higher frequency band than FR2, for example.

The user terminal 20 may perform communication in each CC by using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD).

The plurality of base stations 10 may also be connected by wire (e.g., optical fiber based Common Public Radio Interface (CPRI)), X2 Interface, or the like) or wirelessly (e.g., NR communication). For example, when NR communication is used as a Backhaul between

base stations

11 and 12, base station 11 corresponding to an upper station may be referred to as an Integrated Access Backhaul (IAB) donor (donor) and base station 12 corresponding to a relay (relay) may be referred to as an IAB node.

The base station 10 may also be connected to the core network 30 via other base stations 10 or directly. The Core Network 30 may include at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN)), a Next Generation Core (NGC), and the like.

The user terminal 20 may be a terminal supporting at least one of communication schemes such as LTE, LTE-a, and 5G.

The radio communication system 1 may use a radio access scheme based on Orthogonal Frequency Division Multiplexing (OFDM). For example, in at least one of the downlink (dl)) and the uplink (ul)), Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), or the like may be used.

The radio access method may also be referred to as a waveform (waveform). In the radio communication system 1, other radio access schemes (for example, other single-carrier transmission schemes and other multi-carrier transmission schemes) may be applied to the UL and DL radio access schemes.

In the radio communication system 1, as the Downlink Channel, a Downlink Shared Channel (Physical Downlink Shared Channel (PDSCH))), a Broadcast Channel (Physical Broadcast Channel (PBCH))), a Downlink Control Channel (Physical Downlink Control Channel (PDCCH))) and the like that are Shared by the user terminals 20 may be used.

In the radio communication system 1, as the Uplink Channel, an Uplink Shared Channel (Physical Uplink Shared Channel (PUSCH))), an Uplink Control Channel (Physical Uplink Control Channel (PUCCH))), a Random Access Channel (Physical Random Access Channel (PRACH)), and the like, which are Shared by the user terminals 20, may be used.

User data, higher layer control Information, a System Information Block (SIB), and the like are transmitted through the PDSCH. User data, higher layer control information, etc. may also be transmitted over the PUSCH. In addition, a Master Information Block (MIB)) may also be transmitted through the PBCH.

The lower layer control information may also be transmitted through the PDCCH. The lower layer Control Information may include, for example, Downlink Control Information (DCI)) including scheduling Information of at least one of the PDSCH and the PUSCH.

The DCI scheduling PDSCH may be referred to as DL assignment, DL DCI, or the like, and the DCI scheduling PUSCH may be referred to as UL grant, UL DCI, or the like. The PDSCH may be interpreted as DL data, and the PUSCH may be interpreted as UL data.

For PDCCH detection, a COntrol REsource SET (countrol REsource SET (CORESET)) and a search space (search space) may be used. CORESET corresponds to searching for DCI resources. The search space corresponds to a search region and a search method of PDCCH candidates (PDCCH candidates). 1 CORESET may also be associated with 1 or more search spaces. The UE may also monitor the CORESET associated with a certain search space based on the search space settings.

One search space may also correspond to PDCCH candidates that conform to 1 or more aggregation levels (aggregation levels). The 1 or more search spaces may also be referred to as a set of search spaces. In addition, "search space", "search space set", "search space setting", "search space set setting", "CORESET setting", and the like of the present disclosure may be replaced with each other.

Uplink Control Information (UCI)) including at least one of Channel State Information (CSI), ACKnowledgement Information (for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK)), ACK/NACK, and Scheduling ReQuest (SR)) may be transmitted through the PUCCH. A random access preamble for establishing a connection with a cell may also be transmitted through the PRACH.

In addition, in the present disclosure, a downlink, an uplink, and the like may also be expressed without "link". Further, it can be said that "Physical (Physical)" is not attached to the head of each channel.

In the wireless communication system 1, a Synchronization Signal (SS), a Downlink Reference Signal (DL-RS), and the like may be transmitted. In the wireless communication system 1, the DL-RS may be a Cell-specific Reference Signal (CRS), a Channel State Information Reference Signal (CSI-RS), a DeModulation Reference Signal (DMRS), a Positioning Reference Signal (PRS), a Phase Tracking Reference Signal (PTRS), or the like.

The Synchronization Signal may be at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS), for example. The signal blocks containing SS (PSS, SSs) and PBCH (and DMRS for PBCH) may also be referred to as SS/PBCH blocks, SS blocks (SSB), and the like. In addition, SS, SSB, etc. may also be referred to as reference signals.

In addition, in the wireless communication system 1, as an Uplink Reference Signal (UL-RS), a measurement Reference Signal (Sounding Reference Signal (SRS)), a demodulation Reference Signal (DMRS), or the like may be transmitted. The DMRS may also be referred to as a user terminal specific Reference Signal (UE-specific Reference Signal).

(base station)

Fig. 5 is a diagram showing an example of the configuration of a base station according to an embodiment. The base station 10 includes a control unit 110, a transmitting/receiving unit 120, a transmitting/receiving antenna 130, and a transmission line interface (transmission line interface) 140. The control unit 110, the transmission/reception unit 120, the transmission/reception antenna 130, and the transmission line interface 140 may be provided in plural numbers.

In this example, the functional blocks of the characteristic parts in the present embodiment are mainly shown, but it is also conceivable that the base station 10 also has other functional blocks necessary for wireless communication. A part of the processing of each unit described below may be omitted.

The control unit 110 performs overall control of the base station 10. The control unit 110 can be configured by a controller, a control circuit, and the like described based on common knowledge in the technical field of the present disclosure.

The control unit 110 may also control generation of signals, scheduling (e.g., resource allocation, mapping), and the like. The control unit 110 may control transmission and reception, measurement, and the like using the transmission and reception unit 120, the transmission and reception antenna 130, and the transmission path interface 140. Control section 110 may generate data, control information, sequence (sequence), and the like to be transmitted as a signal, and forward the generated data, control information, sequence, and the like to transmission/reception section 120. The control unit 110 may perform call processing (setting, release, and the like) of a communication channel, state management of the base station 10, management of radio resources, and the like.

The transceiver 120 may also include a baseband (baseband) unit 121, a Radio Frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may also include a transmission processing unit 1211 and a reception processing unit 1212. The transmission/reception section 120 can be configured by a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter (phase shifter), a measurement circuit, a transmission/reception circuit, and the like, which are described based on common knowledge in the technical field of the present disclosure.

The transmission/reception unit 120 may be configured as an integrated transmission/reception unit, or may be configured by a transmission unit and a reception unit. The transmission unit may be constituted by the transmission processing unit 1211 and the RF unit 122. The receiving unit may be configured by the reception processing unit 1212, the RF unit 122, and the measurement unit 123.

The transmitting/receiving antenna 130 can be configured by an antenna described based on common knowledge in the technical field of the present disclosure, for example, an array antenna.

The transmitting/receiving unit 120 may transmit the above-described downlink channel, synchronization signal, downlink reference signal, and the like. The transmission/reception unit 120 may receive the uplink channel, the uplink reference signal, and the like.

Transmit/receive section 120 may form at least one of a transmit beam and a receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), and the like.

For example, with respect to Data, Control information, and the like acquired from Control section 110, transmission/reception section 120 (transmission processing section 1211) may perform processing of a Packet Data Convergence Protocol (PDCP) layer, processing of a Radio Link Control (RLC) layer (e.g., RLC retransmission Control), processing of a Medium Access Control (MAC) layer (e.g., HARQ retransmission Control), and the like, and generate a bit string to be transmitted.

Transmission/reception section 120 (transmission processing section 1211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-analog conversion on a bit sequence to be transmitted, and output a baseband signal.

The transmission/reception unit 120(RF unit 122) may perform modulation, filtering, amplification, and the like on a baseband signal in a radio frequency band, and transmit a signal in the radio frequency band via the transmission/reception antenna 130.

On the other hand, the transmission/reception unit 120(RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, and the like on a signal in a radio frequency band received by the transmission/reception antenna 130.

Transmission/reception section 120 (reception processing section 1212) may acquire user data and the like by applying, to the acquired baseband signal, reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering processing, demapping, demodulation, decoding (may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing.

The transmission/reception unit 120 (measurement unit 123) may also perform measurement related to the received signal. For example, measurement section 123 may perform Radio Resource Management (RRM) measurement, Channel State Information (CSI) measurement, and the like based on the received signal. Measurement section 123 may perform measurement of Received Power (e.g., Reference Signal Received Power (RSRP)), Received Quality (e.g., Reference Signal Received Quality (RSRQ)), Signal to Interference plus Noise Ratio (SINR)), Signal to Noise Ratio (SNR)), Signal Strength Indicator (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), and the like. The measurement results may also be output to the control unit 110.

The transmission path interface 140 may transmit and receive signals (backhaul signaling) to and from devices included in the core network 30, other base stations 10, and the like, or may acquire and transmit user data (user plane data) and control plane data and the like for the user terminal 20.

The transmitting unit and the receiving unit of the base station 10 in the present disclosure may be configured by at least one of the transmitting/receiving unit 120, the transmitting/receiving antenna 130, and the transmission line interface 140.

Further, the transmission/reception unit 120 may transmit at least one of the downlink channel and the downlink reference signal. Furthermore, the transmission/reception unit 120 may receive at least one of the uplink shared channel and the uplink reference signal. The transmitting/receiving unit 120 may transmit information on the priority of at least one of the downlink channel and the uplink channel.

When the downlink channel and the downlink reference signal are set or allocated to the same resource, the control section 110 may set the mapping rule or the reception operation of the UE separately based on the type of the downlink channel. Alternatively, when the uplink channel and the uplink reference signal are set or allocated to the same resource, the base station 110 may set the mapping rule or the transmission operation of the UE separately based on the type of the uplink channel.

(user terminal)

Fig. 6 is a diagram showing an example of a configuration of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transmission/reception unit 220, and a transmission/reception antenna 230. Further, the control unit 210, the transmission/reception unit 220, and the transmission/reception antenna 230 may be provided in one or more numbers.

In this example, the functional blocks of the characteristic parts in the present embodiment are mainly shown, but it is also conceivable that the user terminal 20 also has other functional blocks necessary for wireless communication. A part of the processing of each unit described below may be omitted.

The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be configured by a controller, a control circuit, and the like described based on common knowledge in the technical field of the present disclosure.

The control unit 210 may also control the generation, mapping, etc. of the signals. Control section 210 may control transmission/reception, measurement, and the like using transmission/reception section 220 and transmission/reception antenna 230. Control section 210 may generate data, control information, a sequence, and the like to be transmitted as a signal, and forward the generated data, control information, sequence, and the like to transmission/reception section 220.

The transceiver unit 220 may also include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband section 221 may include a transmission processing section 2211 and a reception processing section 2212. The transmitting/receiving section 220 can be configured by a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitting/receiving circuit, and the like, which are described based on common knowledge in the technical field of the present disclosure.

The transmission/reception unit 220 may be configured as an integrated transmission/reception unit, or may be configured by a transmission unit and a reception unit. The transmission section may be constituted by the transmission processing section 2211 and the RF section 222. The receiving unit may be composed of a reception processing unit 2212, an RF unit 222, and a measuring unit 223.

The transmission/reception antenna 230 can be configured by an antenna described based on common knowledge in the technical field of the present disclosure, for example, an array antenna.

The transmitting/receiving unit 220 may receive the downlink channel, the synchronization signal, the downlink reference signal, and the like. The transmission/reception unit 220 may transmit the uplink channel, the uplink reference signal, and the like described above.

Transmit/receive section 220 may form at least one of a transmit beam and a receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), and the like.

For example, transmission/reception section 220 (transmission processing section 2211) may perform processing in the PDCP layer, processing in the RLC layer (for example, RLC retransmission control), processing in the MAC layer (for example, HARQ retransmission control), and the like on data, control information, and the like acquired from control section 210, and generate a bit sequence to be transmitted.

Transmission/reception section 220 (transmission processing section 2211) may perform transmission processing such as channel coding (including error correction coding as well), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion on a bit sequence to be transmitted, and output a baseband signal.

Whether or not DFT processing is applied may be set based on transform precoding. For a certain channel (e.g., PUSCH), when transform precoding is active (enabled), transmission/reception section 220 (transmission processing section 2211) may perform DFT processing as the transmission processing in order to transmit the channel using a DFT-s-OFDM waveform, or otherwise, transmission/reception section 220 (transmission processing section 2211) may not perform DFT processing as the transmission processing.

The transmission/reception section 220(RF section 222) may perform modulation, filtering, amplification, and the like on the baseband signal in the radio frequency band, and transmit the signal in the radio frequency band via the transmission/reception antenna 230.

On the other hand, the transmission/reception unit 220(RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, and the like on a signal in a radio frequency band received by the transmission/reception antenna 230.

Transmission/reception section 220 (reception processing section 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering processing, demapping, demodulation, decoding (including error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, and acquire user data.

The transceiver unit 220 (measurement unit 223) may also perform measurements related to the received signal. For example, the measurement unit 223 may also perform RRM measurement, CSI measurement, and the like based on the received signal. Measurement unit 223 may also measure for received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), and the like. The measurement result may also be output to the control unit 210.

In addition, the transmitting unit and the receiving unit of the user terminal 20 in the present disclosure may be configured by at least one of the transmitting/receiving unit 220 and the transmitting/receiving antenna 230.

Further, transmission/reception section 220 may receive at least one of the downlink channel and the downlink reference signal. Further, the transmission/reception unit 220 may transmit at least one of the uplink shared channel and the uplink reference signal. The transmitting/receiving unit 220 may also receive information on the priority of at least one of the downlink channel and the uplink channel.

Control section 210 may perform control such that, when the downlink channel and the downlink reference signal are set or allocated to the same resource, a reception operation is performed separately based on the type of the downlink channel (for example, a reception operation is performed differently for each type).

The downlink reference signal may be discarded when the first downlink channel and the downlink reference signal are set or allocated to the same resource, and the downlink reference signal may be transmitted when a second downlink channel different in type from the first downlink channel and the downlink reference signal are set or allocated to the same resource.

Alternatively, the control may be performed such that the resource of the downlink reference signal is used for the first downlink channel when the first downlink channel and the downlink reference signal are set or allocated to the same resource, and the resource of the downlink reference signal is not used for the second downlink channel when the second downlink channel different in type from the first downlink channel and the downlink reference signal are set or allocated to the same resource.

Alternatively, the control may be performed such that the symbol of the downlink reference signal is not used for the first downlink channel when the first downlink channel and the downlink reference signal are set or allocated to the same resource, and the resource of the downlink reference signal is not used for the second downlink channel when the second downlink channel different in type from the first downlink channel and the downlink reference signal are set or allocated to the same resource.

Control section 210 may select a reception operation based on a specific condition when the first downlink channel and the downlink reference signal are set or allocated to the same resource, and may select a specific reception operation when the second downlink channel and the downlink reference signal of a different type from the first downlink channel are set or allocated to the same resource.

Control section 210 may perform control so that, when the uplink channel and the uplink reference signal are set or allocated to the same resource, the transmission operation is performed separately based on the type of the uplink channel (for example, different transmission operations are performed for each type).

Control section 210 may also perform control so that the uplink reference signal is discarded when the first uplink channel and the uplink reference signal are set or allocated to the same resource, and the uplink reference signal is transmitted when a second uplink channel of a different type from the first uplink channel and the uplink reference signal are set or allocated to the same resource.

Alternatively, control section 210 may perform control such that the first uplink channel is allocated to the resource of the uplink reference signal when the first uplink channel and the uplink reference signal are set or allocated to the same resource, and the second uplink channel is not allocated to the resource of the uplink reference signal when the second uplink channel different in type from the first uplink channel and the uplink reference signal are set or allocated to the same resource.

Alternatively, control section 210 may perform control such that when the first uplink channel and the uplink reference signal are set or allocated to the same time resource, the first uplink channel is allocated to a symbol different from the symbol of the uplink reference signal, and when a second uplink channel different in type from the first uplink channel and the uplink reference signal are set or allocated to the same resource, the second uplink channel is not allocated to the resource of the uplink reference signal.

Alternatively, control section 210 may select a transmission operation based on a specific condition when the first uplink channel and the uplink reference signal are set or allocated to the same resource, and may select a specific transmission operation when a second uplink channel and the uplink reference signal of a different type from the first uplink channel are set or allocated to the same resource.

(hardware construction)

The block diagram used in the description of the above embodiment shows blocks in functional units. These functional blocks (structural units) are implemented by any combination of at least one of hardware and software. The method of implementing each functional block is not particularly limited. That is, each functional block may be implemented by one apparatus that is physically or logically combined, or may be implemented by a plurality of apparatuses that are directly or indirectly (for example, by wire or wireless) connected to two or more apparatuses that are physically or logically separated. The functional blocks may also be implemented by combining the above-described apparatus or apparatuses with software.

Here, the functions include judgment, determination, judgment, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, establishment, comparison, assumption, expectation, view, broadcast (broadcasting), notification (notification), communication (communicating), forwarding (forwarding), configuration (setting), reconfiguration (resetting), allocation (allocating, mapping), assignment (assigning), and the like, but are not limited to these. For example, a function block (a configuration unit) that realizes a transmission function may also be referred to as a transmission unit (transmitting unit), a transmitter (transmitter), or the like. Any of these methods is not particularly limited, as described above.

For example, the base station, the user terminal, and the like in one embodiment of the present disclosure may also function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 7 is a diagram showing an example of hardware configurations of a base station and a user terminal according to an embodiment. The base station 10 and the user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.

In addition, in the present disclosure, terms such as device, circuit, apparatus, section (section), unit, and the like can be substituted for each other. The hardware configurations of the base station 10 and the user terminal 20 may include one or more of the respective devices shown in the drawings, or may not include some of the devices.

For example, only one processor 1001 is illustrated, but there may be multiple processors. The processing may be executed by one processor, or may be executed by two or more processors simultaneously, sequentially, or by another method. Further, the processor 1001 may be implemented by one or more chips.

Each function of the base station 10 and the user terminal 20 is realized by, for example, reading specific software (program) into hardware such as the processor 1001 and the memory 1002, performing an operation by the processor 1001 to control communication via the communication device 1004, or controlling at least one of reading and writing of data in the memory 1002 and the storage 1003.

The processor 1001 controls the entire computer by operating an operating system, for example. The processor 1001 may be configured by a Central Processing Unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, and the like. For example, at least a part of the control unit 110(210), the transmitting and receiving unit 120(220), and the like may be implemented by the processor 1001.

Further, the processor 1001 reads out a program (program code), a software module, data, and the like from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and executes various processes according to them. As the program, a program that causes a computer to execute at least a part of the operations described in the above-described embodiments can be used. For example, the control unit 110(210) may be realized by a control program stored in the memory 1002 and operated by the processor 1001, and may be similarly realized for other functional blocks.

The Memory 1002 may be a computer-readable recording medium, and may be formed of at least one of a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically Erasable Programmable ROM (EEPROM)), a Random Access Memory (RAM), or another suitable storage medium. The memory 1002 may also be referred to as a register, cache, main memory (primary storage), or the like. The memory 1002 can store a program (program code), a software module, and the like that are executable to implement the wireless communication method according to one embodiment of the present disclosure.

The storage 1003 may be a computer-readable recording medium, and may be, for example, at least one of a flexible disk (flexible Disc), a Floppy (registered trademark) disk, an optical disk (e.g., a Compact Disc read only memory (CD-ROM)) or the like), a digital versatile Disc (dvd), a Blu-ray (registered trademark) disk, a removable disk (removable Disc), a hard disk drive, a smart card (smart card), a flash memory device (e.g., a card (card), a stick (stick), a key drive), a magnetic stripe (stripe), a database, a server, or another suitable storage medium.

The communication device 1004 is hardware (transmission/reception 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. Communication apparatus 1004 may be configured to include a high-Frequency switch, a duplexer, a filter, a Frequency synthesizer, and the like, in order to realize at least one of Frequency Division Duplexing (FDD) and Time Division Duplexing (TDD), for example. For example, the transmitting/receiving unit 120(220), the transmitting/receiving antenna 130(230), and the like described above may be implemented by the communication device 1004. The transmitting/receiving unit 120(220) may be physically or logically separately installed from the transmitting unit 120a (220a) and the receiving unit 120b (220 b).

The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, and the like) that receives an input from the outside. The output device 1006 is an output device (for example, a display, a speaker, a Light Emitting Diode (LED) lamp, or the like) that outputs to the outside. The input device 1005 and the output device 1006 may be integrated (for example, a touch panel).

Further, the processor 1001, the memory 1002, and other devices are connected by a bus 1007 for communicating information. The bus 1007 may be formed by a single bus, or may be formed by different buses between the respective devices.

The base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), or the like, and a part or all of the functional blocks may be implemented by the hardware. For example, the processor 1001 may also be implemented with at least one of these hardware.

(modification example)

In addition, terms described in the present disclosure and terms required for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, channels, symbols, and signals (signals or signaling) may be substituted for one another. Further, the signal may also be a message. The Reference Signal (Reference Signal) may also be referred to as RS for short, and may also be referred to as Pilot (Pilot), Pilot Signal, etc. depending on the applied standard. Further, Component Carriers (CCs) may also be referred to as cells, frequency carriers, Carrier frequencies, and the like.

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

Here, the parameter set may also refer to a communication parameter applied in at least one of transmission and reception of a certain signal or channel. For example, the parameter set may indicate at least one of SubCarrier Spacing (SCS), bandwidth, symbol length, cyclic prefix length, Transmission Time Interval (TTI), the number of symbols per TTI, radio frame structure, specific filtering processing performed by the transceiver in the frequency domain, specific windowing processing performed by the transceiver in the Time domain, and the like.

The time slot may be formed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM)) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, or the like) in the time domain. Further, the time slot may also be a time unit based on a parameter set.

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

The radio frame, subframe, slot, mini-slot, and symbol all represent a unit of time when a signal is transmitted. The radio frame, subframe, slot, mini-slot, and symbol may also use other names corresponding to each. In addition, time units such as frames, subframes, slots, mini-slots, symbols, etc. in the present disclosure may be replaced with one another.

For example, one subframe may also be referred to as TTI, a plurality of consecutive subframes may also be referred to as TTI, and one slot or one mini-slot may also be referred to as TTI. That is, at least one of the subframe and TTI may be a subframe (1ms) in the conventional LTE, may be a period shorter than 1ms (for example, 1 to 13 symbols), or may be a period longer than 1 ms. The unit indicating TTI may be referred to as a slot, a mini slot, or the like, instead of a subframe.

Here, the TTI refers to, for example, the minimum time unit of scheduling in wireless communication. For example, in the LTE system, the base station performs scheduling for allocating radio resources (such as a frequency bandwidth and transmission power usable by each user terminal) to each user terminal in TTI units. In addition, the definition of TTI is not limited thereto.

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

When one slot or one mini-slot is referred to as a TTI, one or more TTIs (i.e., one or more slots or one or more mini-slots) may be the minimum time unit for scheduling. The number of slots (the number of mini-slots) constituting the minimum time unit of the schedule may be controlled.

The TTI having a time length of 1ms may also be referred to as a normal TTI (TTI in 3GPP Rel.8-12), a standard TTI, a long TTI, a normal subframe, a standard subframe, a long subframe, a slot, etc. A TTI shorter than a normal TTI may also be referred to as a shortened TTI, a short TTI, a partial TTI, a shortened subframe, a short subframe, a mini-slot, a sub-slot, a slot, etc.

In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length exceeding 1ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length smaller than the long TTI and equal to or longer than 1 ms.

A Resource Block (RB) is a Resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers (subcarriers) in the frequency domain. The number of subcarriers included in an RB may be the same regardless of the parameter set, and may be 12, for example. The number of subcarriers included in the RB may also be decided based on the parameter set.

In addition, an RB may include one or more symbols in the time domain, and may have a length of one slot, one mini-slot, one subframe, or one TTI. One TTI, one subframe, and the like may be formed of one or more resource blocks.

In addition, one or more RBs may also be referred to as a Physical Resource Block (PRB), a subcarrier Group (SCG), a Resource Element Group (REG), a PRB pair, an RB pair, and the like.

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

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

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

At least one of the set BWPs may be active, and the UE may not expect to transmit and receive a specific signal/channel other than the active BWP. In addition, "cell", "carrier", and the like in the present disclosure may also be interpreted as "BWP".

The above-described configurations of radio frames, subframes, slots, mini slots, symbols, and the like are merely examples. For example, the structure of 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 can be variously changed.

The information, parameters, and the like described in the present disclosure may be expressed as absolute values, relative values to specific values, or other corresponding information. For example, the radio resource may also be indicated by a specific index.

In the present disclosure, the names used for the parameters and the like are not limitative names in all aspects. Further, the mathematical expressions and the like using these parameters may also be different from those explicitly disclosed in the present disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable names, and thus, the various names assigned to these various channels and information elements are not limitative names in all aspects.

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

Information, signals, and the like can be output to at least one of a higher layer (upper layer) to a lower layer (lower layer) and a lower layer to a higher layer. Information, signals, and the like may be input and output via a plurality of network nodes.

The input/output information, signals, and the like may be stored in a specific location (for example, a memory) or may be managed by a management table. The input/output information, signals, and the like may be overwritten, updated, or appended. The output information, signals, etc. may also be deleted. The input information, signals, etc. may also be transmitted to other devices.

The information notification is not limited to the embodiment and embodiment described in the present disclosure, and may be performed by other methods. For example, the Information notification in the present disclosure may be implemented by physical layer signaling (e.g., Downlink Control Information (DCI)), Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC)) signaling, broadcast Information (Master Information Block (MIB)), System Information Block (SIB)), or the like), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

The physical Layer signaling may also be referred to as Layer 1/Layer 2(L1/L2)) control information (L1/L2 control signal), L1 control information (L1 control signal), and the like. The RRC signaling may be referred to as an RRC message, and may be, for example, an RRC Connection Setup (RRC Connection Setup) message, an RRC Connection Reconfiguration (RRC Connection Reconfiguration) message, or the like. The MAC signaling may be notified using a MAC Control Element (CE), for example.

Note that the notification of the specific information (for example, the notification of "X") is not limited to an explicit notification, and may be performed implicitly (for example, by not performing the notification of the specific information or by performing the notification of other information).

The decision may be made by a value (0 or 1) represented by one bit, by a true-false value (boolean) represented by true (true) or false (false), or by a comparison of values (e.g., with a specific value).

Software, whether referred to as software (software), firmware (firmware), middleware-ware (middle-ware), microcode (micro-code), hardware description language, or by other names, should be broadly construed to mean instructions, instruction sets, code (code), code segments (code segments), program code (program code), programs (program), subroutines (sub-program), software modules (software module), applications (application), software applications (software application), software packages (software packages), routines (routine), subroutines (sub-routine), objects (object), executables, threads of execution, processes, functions, or the like.

Software, instructions, information, and the like may also be transmitted or received via a transmission medium. For example, where the software is transmitted from a website, server, or other remote source (remote source) using at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), etc.) and wireless technology (infrared, microwave, etc.), at least one of these wired and wireless technologies is included within the definition of transmission medium.

The terms "system" and "network" as used in this disclosure can be used interchangeably. "network" may also mean a device (e.g., a base station) included in a network.

In the present disclosure, terms such as "precoding", "precoder", "weight", "Quasi-Co-location (qcl)", "Transmission Configuration Indication state (TCI state)", "spatial relationship (spatial relationship)", "spatial filter (spatial domain filter)", "Transmission power", "phase rotation", "antenna port group", "layer", "rank", "resource set", "resource group", "beam width", "beam angle", "antenna element", "panel", and the like can be used interchangeably.

In the present disclosure, terms such as "Base Station (BS)", "wireless Base Station", "fixed Station (fixed Station)", "NodeB", "enb (enodeb)", "gnb (gtnodeb)", "access point (access point)", "Transmission Point (TP)", "Reception Point (RP)", "Transmission Reception Point (TRP)", "panel", "cell", "sector", "cell group", "carrier", "component carrier" can be used interchangeably. There are also cases where a base station is referred to by terms such as macrocell, smallcell, femtocell, picocell, and the like.

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 smaller area can also provide communication services through a base station subsystem (e.g., a Remote Radio Head (RRH)) for indoor use. The term "cell" or "sector" refers to a portion or the entirety of the coverage area of at least one of a base station and a base station subsystem that is in communication service within the coverage area.

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

In some instances, a mobile station is also referred to as a subscriber station, 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 (hand set), user agent, mobile client, or some other suitable terminology.

At least one of the base station and the mobile station may also be referred to as a transmitting apparatus, a receiving apparatus, a wireless communication apparatus, and the like. At least one of the base station and the mobile station may be a device mounted on a mobile body, a mobile body main body, or the like. The mobile body may be a vehicle (e.g., a vehicle, an airplane, etc.), may be a mobile body that moves in an unmanned manner (e.g., a drone (a drone), an autonomous vehicle, etc.), or may be a robot (manned or unmanned). At least one of the base station and the mobile station further includes a device that does not necessarily move when performing a communication operation. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

In addition, the base station in the present disclosure may also be interpreted as a user terminal. For example, the various aspects/embodiments of the present disclosure may also be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between a plurality of user terminals (e.g., may also be referred to as Device-to-Device (D2D)), Vehicle networking (V2X), etc.). In this case, the user terminal 20 may have the functions of the base station 10 described above. The expressions such as "uplink" and "downlink" can also be interpreted as expressions (for example, "side") corresponding to communication between terminals. For example, an uplink channel, a downlink channel, and the like may also be interpreted as a side channel.

Likewise, a user terminal in the present disclosure may also be interpreted as a base station. In this case, the base station 10 may have the functions of the user terminal 20 described above.

In the present disclosure, the operation performed by the base station is sometimes performed by an upper node (upper node) of the base station, depending on the case. Obviously, in a network including one or more network nodes (network nodes) having a base station, various actions performed for communication with a terminal may be performed by the base station, one or more network nodes other than the base station (for example, considering a Mobility Management Entity (MME), a Serving-Gateway (S-GW), and the like, but not limited thereto), or a combination thereof.

The embodiments and modes described in the present disclosure may be used alone, may be used in combination, or may be switched to use with execution. Note that, in the embodiments and the embodiments described in the present disclosure, the order of the processes, sequences, flowcharts, and the like may be changed as long as they are not contradictory. For example, elements of various steps are presented in an exemplary order for a method described in the present disclosure, but the present invention is not limited to the specific order presented.

The aspects/embodiments described in the present disclosure may also be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-a), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, fourth generation Mobile communication System (4 generation communication System (4G)), fifth generation Mobile communication System (5G)), Future Radio Access (FRA), New Radio Access Technology (RAT)), New Radio (New Radio trademark (NR)), New Radio Access (NX)), New Radio Access (Future Radio Access), FX), Global Broadband communication System (Global System for Mobile communication (GSM)), and Mobile Broadband communication System (CDMA) (2000 Mobile communication System)), (CDMA, etc.) IEEE 802.11(Wi-Fi (registered trademark)), IEEE 802.16(WiMAX (registered trademark)), IEEE 802.20, Ultra-wideband (uwb), Bluetooth (registered trademark), a system using another appropriate wireless communication method, a next generation system expanded based on these, and the like. Furthermore, multiple systems may also be applied in combination (e.g., LTE or LTE-a, combination with 5G, etc.).

The term "based on" used in the present disclosure does not mean "based only" unless otherwise specified. In other words, the expression "based on" means both "based only on" and "based at least on".

Any reference to the use of the terms "first," "second," etc. in this disclosure does not fully define the amount or order of such elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, reference to first and second elements does not imply that only two elements may be used or that the first element must somehow override the second element.

The term "determining" as used in this disclosure encompasses a wide variety of actions in some cases. For example, "determination (decision)" may be regarded as a case where "determination (decision)" is performed on determination (rounding), calculation (calculating), processing (processing), derivation (deriving), investigation (investigating), search (looking up), search, inquiry (query)) (for example, search in a table, a database, or another data structure), confirmation (authenticating), and the like.

The "determination (decision)" may be regarded as a case of "determining (deciding)" on reception (e.g., reception information), transmission (e.g., transmission information), input (input), output (output), access (e.g., access to data in a memory), and the like.

The "determination (decision)" may be also regarded as a case of performing "determination (decision)" on solution (resolving), selection (selecting), selection (breathing), establishment (evaluating), comparison (comparing), and the like. That is, "judgment (decision)" may also be regarded as a case where "judgment (decision)" is performed on some actions.

The term "determination (decision)" may be interpreted as "assumption", "expectation", "consideration", and the like.

The terms "connected" and "coupled" or any variation thereof used in the present disclosure mean all connections or couplings between two or more elements directly or indirectly, and can include a case where one or more intermediate elements exist between two elements "connected" or "coupled" to each other. The combination or connection between the elements may be physical, logical, or a combination of these. For example, "connection" may also be interpreted as "access".

In the present disclosure, where two elements are connected, it can be considered to be "connected" or "joined" to each other using more than one wire, cable, printed electrical connection, etc., and using electromagnetic energy having a wavelength in the radio frequency domain, the microwave region, the optical (both visible and invisible) region, etc., as several non-limiting and non-inclusive examples.

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

In the present disclosure, when the terms "including", and "variations thereof are used, these terms are intended to have inclusive meanings as in the term" comprising ". Further, the term "or" used in the present disclosure does not mean exclusive or.

In the present disclosure, for example, in the case where articles are added by translation as in a, an, and the in english, the present disclosure may also include the case where nouns following these articles are plural.

Although the invention according to the present disclosure has been described in detail above, it will be apparent to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The invention according to the present disclosure can be implemented as modifications and variations without departing from the spirit and scope of the invention defined by the claims. Therefore, the description of the present disclosure is for illustrative purposes and does not have any limiting meaning to the invention to which the present disclosure relates.

Claims

1. A terminal, comprising:

a transmitting unit configured to transmit at least one of an uplink shared channel and an uplink reference signal; and

and a control unit configured to perform different transmission operations based on a type of the uplink shared channel when the uplink shared channel and the uplink reference signal are set or allocated to the same resource.

2. The terminal of claim 1,

the control unit performs control such that the uplink reference signal is discarded when a first uplink channel and the uplink reference signal are set or allocated to the same resource, and the uplink reference signal is transmitted when a second uplink channel different in type from the first uplink channel and the uplink reference signal are set or allocated to the same resource.

3. The terminal of claim 1,

the control unit performs control such that, when a first uplink channel and the uplink reference signal are set or allocated to the same resource, the first uplink channel is allocated to the resource of the uplink reference signal, and when a second uplink channel different in type from the first uplink channel and the uplink reference signal are set or allocated to the same resource, the second uplink channel is not allocated to the resource of the uplink reference signal.

4. The terminal of claim 1,

the control unit performs control such that, when a first uplink channel and the uplink reference signal are set or allocated to the same time resource, the first uplink channel is allocated to a symbol different from a symbol of the uplink reference signal, and when a second uplink channel different in type from the first uplink channel and the uplink reference signal are set or allocated to the same resource, the second uplink channel is not allocated to the resource of the uplink reference signal.

5. The terminal of claim 1,

the control unit selects a transmission operation based on a specific condition when a first uplink channel and the uplink reference signal are set or allocated to the same resource, and selects a specific transmission operation when a second uplink channel different in type from the first uplink channel and the uplink reference signal are set or allocated to the same resource.

6. A method of wireless communication, comprising:

a step of transmitting at least one of an uplink shared channel and an uplink reference signal; and

and performing different transmission operations based on the type of the uplink shared channel when the uplink shared channel and the uplink reference signal are set or allocated to the same resource.