User terminal and radio communication method

A user terminal includes: a receiving section that receives configuration information of a search space set; and a control section that controls monitoring of downlink control information (DCI) of a first format other than formats 0_0 and 0_1 used for scheduling of an uplink shared channel and a second format other than formats 1_0 and 1_1 used for scheduling of a downlink shared channel in the search space set configured based on the configuration information. According to an aspect of the present disclosure, monitoring of downlink control information can be appropriately controlled.

TECHNICAL FIELD

The present disclosure relates to a user terminal and a radio communication method in next-generation mobile communication systems.

BACKGROUND ART

Successor systems of LTE (e.g., referred to as “5th generation mobile communication system (5G),” “5G+ (plus),” “New Radio (NR),” “3GPP Rel. 15 (or later versions),” and so on) are also under study.

CITATION LIST

SUMMARY OF INVENTION

Technical Problem

For future radio communication systems (hereinafter also referred to as NR), introduction of new formats other than existing formats of downlink control information (DCI) (for example, DCI formats 1_0, 1_1, 0_0, 0_1, 2_0, 2_1, 2_2, and 2_3) has been under study.

The new formats may be used for at least one of, for example, services of high reliable and low latency communication (Ultra-Reliable and Low-Latency Communications (URLLC)) and uplink preemption.

However, when the new formats are introduced, search space sets used for monitoring (also referred to as blind decoding or the like) of the DCI may not be able to be appropriately configured for the UE. As a result, the UE may not be able to appropriately control monitoring of the DCI.

In the light of this, the inventors of the present invention have one object to provide a user terminal and a radio communication method that enable appropriate control of monitoring of DCI.

Solution to Problem

A user terminal according to an aspect of the present disclosure includes: a receiving section that receives configuration information of a search space set; and a control section that controls monitoring of downlink control information (DCI) of a first format other than formats 0_0 and 0_1 used for scheduling of an uplink shared channel and a second format other than formats 1_0 and 1_1 used for scheduling of a downlink shared channel in the search space set configured based on the configuration information.

Advantageous Effects of Invention

According to an aspect of the present disclosure, monitoring of DCI can be appropriately controlled.

DESCRIPTION OF EMBODIMENTS

The UE is configured with one or more search space (SS) sets. The SS set is also referred to as a PDCCH search space set, a search space, or the like.

The UE monitors PDCCH candidates in one or more SS sets. The one or more SS sets may include at least one of a common SS set (common search space (CSS) set) for one or more UEs and a UE-specific SS set (UE-specific search space (USS) set).

The UE may receive configuration information of each SS set (SS configuration information, for example, a Radio Resource Control (RRC) information element (IE) (also referred to as an RRC parameter) “SearchSpace”). For example, the UE may receive each piece of SS configuration information using higher layer signaling. Each piece of SS configuration information may be included in configuration information of a UE-specific PDCCH (for example, an RRC IE “PDCCH-Config”) or configuration information of a cell-specific PDCCH (for example, an RRC IE “PDCCH-ConfigCommon”).

Each piece of SS configuration information may include, for example, at least one of the following parameters (or information related to at least one of the following).

(1) Identifier of the SS set (search space ID, for example, an RRC IE “searchSpaceId”)

(2) Identifier of a CORESET associated with the SS set (control resource set ID, for example, an RRC IE “controlResourceSetId”)

(3) Periodicity and offset of a monitoring occasion including the SS set (for example, an RRC IE “monitoringSlotPeriodicityAndOffset”)

(4) Time period of the monitoring occasion (for example, an RRC IE “duration”)

(5) Number of PDCCH candidates for each aggregation level in the SS set (for example, an RRC IE “nrofCandidates”)

(6) Type of SS set such as the CSS set or the USS set (search space type, for example, an RRC IE “searchSpaceType”)

(7) Information related to the CSS set (CSS set information, for example, an RRC IE “common”)

(8) Information related to the USS set (USS set information, for example, an RRC IE “ue-Specific”)

Here, (7) CSS set information may include information related to a DCI format monitored in the CSS set (DCI format information, for example, RRC IEs “dci-Format0-0-AndFormat1-0”, “dci-Format2-0”, “dci-Format2-1”, “dci-Format2-2”, and “dci-Format2-3”). The DCI format information for the CSS set may indicate, for example, at least one of the DCI format (at least one of DCI formats 0_0 and 1_0, DCI format 2_0, DCI format 2-1, DCI format 2-2, and DCI format 2_3) monitored in the CSS set and the number of PDCCH candidates for each aggregation level used for monitoring of the DCI format.

The CSS set may be, for example, a type 3-PDCCH CSS set used for monitoring of the DCI format used for scrambling in which cyclic redundancy check (CRC) bits are scrambled (CRF-scrambled) with a Slot Format Indicator (SFI)-radio network temporary identifier (RNTI), an Interruption (INT)-RNTI, a Transmit Power Control (TPC)-PUSCH-RNTI, a TPC-PUCCH-RNTI, or a TPC-Sounding Reference Symbols (SRS)-RNTI.

Further, (8) USS set information may include information related to the DCI format monitored in the USS set (DCI format information, for example, an RRC IE “dci-Formats”). The DCI format information for the USS set may indicate, for example, the DCI format (one of DCI formats 0_0 and 1_0 and DCI formats 0_1 and 1_1) monitored in the USS set.

The USS set is used for monitoring of the DCI format CRC-scrambled with a C-RNTI or a CS-RNTI. The UE may be configured with at least one of the USS set for monitoring of DCI formats 0_0 and 1_0 and the USS set for monitoring of DCI formats 0_1 and 1_1.

Here, DCI formats 1_0 and 1_1 are used for scheduling of a downlink shared channel (for example, a Physical Downlink Shared Channel (PDSCH)). DCI formats 0_0 and 0_1 are used for scheduling of an uplink shared channel (for example, a Physical Uplink Shared Channel (PUSCH)).

DCI formats 0_0 and 1_0 may have the same size (payload). Further, DCI formats 0_1 and 1_1 may have the same size. DCI formats 0_0 and 1_0 may have a size smaller than DCI formats 0_1 and 1_1, respectively. DCI formats 1_0 and 0_0 are also referred to as fallback DCI or the like. In contrast, DCI formats 1_1 and 1_0 are also referred to as non-fallback DCI or the like.

FIG.1is a diagram to show an example of the SS configuration information. As shown inFIG.1, the SS configuration information (for example, the RRC IE “SearchSpace”) may include at least one of the parameters (pieces of information) of (1) to (8) above.

Further, the DCI format information (for example, the RRC IE “dci-Formats”) for the USS set in the SS configuration information ofFIG.1may indicate whether the USS set identified with the search space ID is used for monitoring of DCI formats 0_0 and 1_0 or DCI formats 0_1 and 1_1.

The UE may be configured with each SS set, based on each piece of SS configuration information. Further, a given time period of given periodicity for monitoring (blind decoding) each SS set (PDCCH monitoring occasion, monitoring occasion (MO), monitoring time period) may be configured based on each piece of SS configuration information (for example, the parameters of (3) and (4) above).

Specifically, the UE may be configured with the monitoring occasion for each SS set. The UE may monitor the PDCCH candidates for the SS set in the CORESET in the configured monitoring occasion. The monitoring occasion may include one or more slots.

The maximum number of PDCCH candidates that the UE can monitor for each cell and for each slot may be limited. The maximum number may be determined for each subcarrier spacing μ. For example, when the subcarrier spacing μ is 15 kHz, 30 kHz, 60 kHz, and 120 kHz, the maximum number may be 44, 36, 22, and 20, respectively.

Further, the maximum number of non-overlapping control channel elements (CCEs) for each cell and for each slot regarding the UE may be limited. The maximum number may be determined for each subcarrier spacing μ. For example, when the subcarrier spacing μ is 15 kHz, 30 kHz, 60 kHz, and 120 kHz, the maximum number may be 56, 56, 48, and 32, respectively.

Incidentally, in NR, implementation of communication in which required conditions conform to a plurality of different services (also referred to as use cases, traffic types, or the like) in the same cell is assumed. The plurality of services may be, for example, a further enhanced broadband (enhanced Mobile Broadband (eMBB)) and high reliability and low latency communication (Ultra-Reliable and Low-Latency Communications (URLLC)). For example, in URLLC, lower latency and higher reliability as against those of eMBB are required.

Thus, in NR, in addition to the existing DCI formats (for example, DCI formats 1_0, 1_1, 0_0, 0_1, 2_0, 2_1, 2_2, and 2_3), introduction of new DCI formats has been under study. The new DCI formats may be, for example, used for scheduling of the PUSCH or the PDSCH and preemption (for example, uplink preemption).

Here, a new DCI format used for scheduling of the PDSCH is also referred to as DCI format 1_2 or the like. A new DCI format used for scheduling of the PUSCH may be referred to as DCI format 0_2 or the like. Further, a new DCI format used for uplink preemption is also referred to as DCI format 2_4 or the like.

Note that the terms of the new DCI formats are not limited to these. For example, the terms of the new DCI formats for scheduling of the PDSCH and the PUSCH may be terms arranged by replacing “2” of DCI formats 1_2 and DCI format 0_2 with any sequence of characters other than “0” or “1”, or may be other terms. Further, a new DCI format for uplink preemption may be a term arranged by replacing “4” of DCI format 2_4 with any sequence of characters other than “0”, “1”, “2”, or “3”, or may be another term.

In this manner, when the new DCI format (for example, at least one of DCI formats 0_2, 1_2, and 2_4) used for scheduling of the PUSCH or the PDSCH or for preemption (for example, uplink preemption) is introduced, it is assumed that the SS set for monitoring the new DCI format is configured for the UE. However, how to signal configuration of the SS set poses a problem.

Specifically, how to configure the SS configuration information used for configuration of the SS set poses a problem. In the light of this, the inventors of the present invention came up with the idea of appropriately configuring the SS configuration information used for configuration of the SS set for monitoring the new DCI format, to thereby enable appropriate controlling of monitoring of the DCI even when the new DCI format is introduced.

Embodiments according to the present disclosure will be described below in detail with reference to the drawings.

The following will illustrate an example in which the new DCI format used for scheduling of the PUSCH is DCI format 0_2, the new DCI format used for scheduling of the PDSCH is DCI format 1_2, and the new DCI format for uplink preemption is DCI format 2_4. However, as described above, the terms of these new DCI formats are not limited to those illustrated herein.

A first aspect will describe configuration of the SS set (for example, the USS set) for monitoring at least one (DCI format 0_2/1_2) of DCI format 0_2 used for scheduling of the PUSCH and DCI format 1_2 used for scheduling of the PDSCH.

The SS set for DCI format 0_2/1_2 may be one of the USS sets configured based on SS configuration information (for example, the RRC IE “SearchSpace”) (first configuration example), or may be a specific USS set configured based on SS configuration information (second SS configuration information) that is different from the above SS configuration information (first SS configuration information) (second configuration example).

First Configuration Example

The UE may be configured with one or more USS sets. Each USS set configured for the UE may be associated with DCI formats 0_0 and 1_0 (DCI format 0_0/1_0), DCI formats 0_1 and 1_1 (DCI format 0_1/1_1), or DCI format 0_2/1_2.

Each USS set may be configured based on the SS configuration information (for example, the RRC IE “SearchSpace”). Note that the DCI format information (for example, the RRC IE “dci-Formats”) for the USS set in the SS configuration information may selectively indicate one of DCI format 0_0/1_0, DCI format 0_1/1_1, and DCI format 0_2/1_2 as the DCI format monitored in the USS set.

FIG.2is a diagram to show an example of the SS configuration information according to the first configuration example of the first aspect. Note that, althoughFIG.2shows a part of the parameters, the SS configuration information (for example, the RRC IE “SearchSpace”) may include at least one parameter of (1) to (8) above.

As shown inFIG.2, the DCI format information (for example, the RRC IE “dci-Formats”) for the USS set in the SS configuration information (for example, the RRC IE “SearchSpace”) is different from that ofFIG.1in that not only DCI format 0_0/1_0 or DCI format 0_1/1_1 but also DCI format 0_2/1_2 can be specified as the DCI format monitored in the USS set.

As shown inFIG.2, when SS set #1 is configured for the UE as the USS set for DCI format 0_0/1_0, the SS configuration information (for example, the RRC IE “SearchSpace”) of SS set #1 may include the DCI format information (for example, the RRC IE “dci-Formats”) indicating DCI format 0_0/1_0.

Further, when SS set #2 is configured for the UE as the USS set for DCI format 0_1/1_1, the SS configuration information (for example, the RRC IE “SearchSpace”) of SS set #2 may include the DCI format information (for example, the RRC IE “dci-Formats”) indicating DCI format 0_1/1_1.

Further, when SS set #2 is configured for the UE as the USS set for new DCI format 0_2/1_2, the SS configuration information (for example, the RRC IE “SearchSpace”) of SS set #3 may include the DCI format information (for example, the RRC IE “dci-Formats”) indicating DCI format 0_2/1_2.

In this manner, the USS set for DCI format 0_2/1_2 may be configured with the SS configuration information (for example, the RRC IE “SearchSpace”) having the same configuration as the USS set for DCI format 0_0/1_0 or DCI format 0_1/1_1.

The UE may monitor the DCI format indicated by the DCI format information in SS sets #1 to #3 configured by the SS configuration information.

In the first configuration example, the DCI format information for the USS set in the SS configuration information specifies one of DCI format 0_0/0_1, DCI format 0_1/1_1, and DCI format 0_2/1_2, and thus the USS set for new DCI format 0_2/1_2 can be configured without adding a new parameter to the existing SS configuration information (for example,FIG.1).

Further, the USS set for DCI format 0_0/1_0, the USS set for DCI format 0_1/1_1, and the USS set for DCI format 0_2/1_2 can be configured by using the SS configuration information having the same configuration.

Second Configuration Example

The USS set for DCI format 0_2/1_2 may be configured based on the second SS configuration information that is defined separately from the SS configuration information (for example, the RRC IE “SearchSpace”, the first SS configuration information, for example,FIG.1). The second SS configuration information may be used for configuration of only a specific SS set (for example, the USS set for DCI format 0_2/1_2), or may be used for configuration of the specific SS set and another SS set different from the specific SS set.

FIG.3is a diagram to show an example of the second SS configuration information according to the second configuration example of the first aspect. As shown inFIG.3, the second SS configuration information (for example, an RRC IE “SearchSpace formats0-2-And-1-2” or “SearchSpace DCI0-2-And-1-2”) may be used for configuration of a specific SS set (for example, the USS set for DCI format 0_2/1_2).

The second SS configuration information may include at least one parameter of (1) to (5) above. Note that the second SS configuration information may or may not include parameters of (6) to (8) above. The second SS configuration information is for configuration of the USS set for DCI format 0_2/1_2, and the search space type or the like thus need not be specified.

As shown inFIG.3, when SS set θ3 is configured for the UE as the USS set for new DCI format 0_2/1_2, the UE may determine at least one of the search space ID “3”, the control resource set ID of the CORESET associated with SS set #3, periodicity of the monitoring occasion including SS set #3, an offset and a time period, and the number of PDCCH candidates for each aggregation level in SS set #3, using the second SS configuration information.

In contrast, although not shown in the figure, when SS sets #1 and #2 are configured for the UE as the USS sets for DCI format 0_0/0_1 and DCI format 0_1/1_1, respectively, the UE may use the first SS configuration information (for example, the RRC IE “SearchSpace”, seeFIG.1).

In this manner, the USS set for DCI format 0_2/1_2 may be configured by the second SS configuration information (for example, the RRC IE “SearchSpace formats0-2-And-1-2” or “SearchSpace DCI0-2-And-1-2”) that has configuration different from the first SS configuration information (for example, the RRC IE “SearchSpace”) used for the configuration of the USS set for DCI format 0_0/1_0 or DCI format 0_1/1_1.

The UE may monitor the DCI format (DCI format 0_0/1_0 or DCI format 0_1/1_1) indicated by the DCI format information (for example, the RRC IE “dci-Formats” ofFIG.1) for the USS set in the first SS configuration information in SS sets #1 and #2 configured by the first SS configuration information. In contrast, the UE may monitor DCI format 0_2/1_2 in SS set #3 configured by the second SS configuration information.

As shown inFIG.3, by defining the second SS configuration information used for configuration of a specific SS set (for example, the USS set for DCI format 0_2/1_2), the USS set for new DCI format 0_2/1_2 can be configured without making changes to the existing first SS configuration information (for example,FIG.1).

FIG.4is a diagram to show another example of the second SS configuration information according to the second configuration example of the first aspect. The second SS configuration information (for example, an RRC IE “SearchSpace-v16”) may be used not only for configuration of a specific SS set (for example, the USS set for DCI format 0_2/1_2), but also for configuration of another SS set (for example, at least one of the CSS set and the USS set).

Note that, althoughFIG.4shows a part of the parameters, the second SS configuration information (for example, an RRC IE “SearchSpace-r16”) may include at least one parameter of (1) to (8) above. The DCI format information (for example, the RRC IE “dci-Formats”) for the USS set in the second SS configuration information (for example, the RRC IE “SearchSpace-r16”) is different from the first SS configuration information (for example, the RRC IE “SearchSpace”) shown inFIG.1in that not only DCI format 0_0/1_0 or DCI format 0_1/1_1 but also DCI format 0_2/1_2 can be specified as the DCI format monitored in the USS set.

The first SS configuration information (for example, the RRC IE “SearchSpace”) shown inFIG.1may be used for configuration of the SS set for the UE that does not assume configuration of the SS set for DCI format 0_2/1_2 (for example, the UE that supports up to Rel. 15). In contrast, the second SS configuration information (for example, the RRC IE “SearchSpace-r16”) shown inFIG.4may be used for configuration of the SS set for the UE that assumes configuration of the SS set for DCI format 0_2/1_2 (for example, the UE that supports Rel. 16).

In this manner, depending upon whether or not the UE supports a new DCI format, different pieces of SS configuration information (for example, the first SS configuration information ofFIG.1and the second SS configuration information ofFIG.4) may be used for configuration of the SS set.

As shown inFIG.4, when SS set #1 is configured for the UE as the USS set for DCI format 0_0/1_0, the second SS configuration information (for example, the RRC IE “SearchSpace-r16”) for SS set #1 may include the DCI format information (for example, the RRC IE “dci-Formats”) indicating DCI format 0_0/1_0.

Further, when SS set #2 is configured for the UE as the USS set for DCI format 0_1/1_1, the second SS configuration information (for example, the RRC IE “SearchSpace-r16”) for SS set #2 may include the DCI format information (for example, the RRC IE “dci-Formats”) indicating DCI format 0_1/1_1.

Further, when SS set #3 is configured for the UE as the USS set for new DCI format 0_2/1_2, the second SS configuration information (for example, the RRC IE “SearchSpace-r16”) for SS set #3 may include the DCI format information (for example, the RRC IE “dci-Formats”) indicating DCI format 0_2/1_2.

The UE may monitor the DCI format indicated by the DCI format information in SS sets #1 to #3 configured by the second SS configuration information.

As shown inFIG.4, by defining the second SS configuration information (for example, the RRC IE “SearchSpace-r16”) for the UE that supports a new DCI format (for example, DCI format 0_2/1_2), operation can be distinguished from operation of the UE that does not support the new DCI format (for example, DCI format 0_2/1_2).

In the second configuration example, by newly defining the second SS configuration information, the SS set for a new DCI format (for example, the USS set for DCI format 0_2/1_2) can be appropriately configured.

A second aspect will describe configuration of the SS set for monitoring DCI format 2_4 used for uplink preemption.

Each field in DCI format 2_4 may indicate uplink preemption indication (Pre-emption indication). Each field may include a given number of bits (for example, 14 bits).

DCI format 2_4 may be common DCI for a group of one or more UEs (also referred to as group common DCI, UE group common DCI, or the like) or UE-specific DCI. The SS set for monitoring DCI format 2_4 may be the CSS set (for example, the type 3-PDCCH CSS set) or the USS set.

Information related to uplink preemption (uplink preemption information, for example, an RRC IE “UplinkPreemption”) may be included in UE-specific PDCCH information (for example, the RRC IE “PDCCH-Config”).

Further, the SS set for DCI format 2_4 may be configured using the SS configuration information (for example, the RRC IE “SearchSpace”). The SS configuration information may be included in the UE-specific PDCCH information.

FIGS.5A and5Bare each a diagram to show an example of the UE-specific PDCCH information according to the second aspect. As shown inFIG.5A, the UE-specific PDCCH information (for example, the RRC IE “PDCCH-Config”) may include at least one of information related to uplink preemption (uplink preemption information, for example, the RRC IE “UplinkPreemption”) and a list (SS list, for example, an RRC IE “searchSpacesToAddModList”) of one or more pieces of SS configuration information (for example, the RRC IE “SearchSpace”).

As shown inFIG.5B, the uplink preemption information (for example, the RRC IE “UplinkPreemption”) may include at least one of the following.Information (for example, an RRC IE “int-RNTI”) indicating an RNTI (for example, an INT-RNTI) used for CRC scrambling of DCI format 2_4Information (for example, an RRC IE “dci-PayloadSize”) indicating a payload of DCI format 2_4 CRC-scrambled with the INT-RNTIInformation (preemption resource information, for example, an RRC IE “timeFrequencySet”) related to preempted resources (for example, at least one of frequency domain resources and time domain resources)

For example, the preemption resource information may indicate association between bits of a given field in DCI format 2_4 and one or more symbols.

The SS set for DCI format 2_4 may be configured based on the SS configuration information in the SS list. The SS set may be the CSS set, or may be the USS set.

FIG.6is a diagram to show an example of the SS configuration information according to the second aspect.FIG.6shows an example of the SS configuration information that can configure the CSS set for DCI format 2_4. As shown inFIG.6, the SS configuration information may include at least one parameter of (1) to (8) above.

As shown inFIG.6, the CSS set information (for example, the RRC IE “common”) is different from that ofFIG.1in that information related to DCI format 2_4 (DCI format 2_4 information, for example, an RRC IE “dci-Format2-4”) monitored in the CSS set is included as the DCI format information for the CSS set.

The DCI format information for the CSS set shown inFIG.6may indicate, for example, at least one of the DCI format (at least one of DCI formats 0_0 and 1_0, DCI format 2_0, DCI format 2-1, DCI format 2-2, DCI format 2_3, and DCI format 2_4) monitored in the CSS and the number of PDCCH candidates for each aggregation level used for monitoring of the DCI format.

When the CSS set information in the SS configuration information includes the DCI format 2_4 information (for example, the RRC IE “dci-Format2-4”), the UE may monitor DCI format 2_4 in the CSS set configured by the SS configuration information.

FIG.7is a diagram to show another example of the SS configuration information according to the second aspect.FIG.7shows an example of the SS configuration information that can configure the USS set for DCI format 2_4. As shown inFIG.7, the SS configuration information may include at least one parameter of (1) to (8) above.

As shown inFIG.7, the USS set information (for example, the RRC IE “ue-Specific”) may include the DCI format information (for example, the RRC IE “dci-Formats”) that can specify DCI format 0_0/1_0, DCI format 0_1/1_1, or DCI format 2-4.

The UE may monitor the USS set configured by the SS configuration information in the DCI format indicated by the DCI format information in the USS set information.

In the second aspect, when DCI format 2_3 for UL preemption is supported, the SS set for DCI format 2_3 can be appropriately configured for the UE.

It is assumed that given limitations (for example, the maximum number of PDCCH candidates that can be monitored for each cell and for each slot described above, and the number of CCEs that can overlap for each cell and for each slot described above) are set on monitoring of the DCI (also referred to as PDCCH monitoring, DCI monitoring, monitoring, blind decoding, or the like) performed by the UE.

Thus, when DCI format 0_2/1_2 is newly introduced, the UE may possibly drop at least one (monitoring/processing of DCI format 0_2/1_2) of monitoring of DCI format 0_2/1_2 and processing based on DCI format 0_2/1_2. Further, when DCI format 2_4 is newly introduced as well, a similar problem occurs.

In view of this, the UE may perform prioritization of one or more SS sets configured for the UE. Specifically, the UE may perform prioritization of the one or more SS sets, regardless of whether or not each SS set is the SS set (for example, the USS set) for monitoring DCI format 0_2/1_2 (first prioritization). Alternatively, the UE may perform prioritization of the one or more SS sets, based on whether or not each SS set is the SS set (for example, the USS set) for monitoring DCI format 0_2/1_2 (second prioritization).

In the first prioritization, priority of the SS sets may be determined based on the search space IDs (SS set indices), regardless of whether or not each SS set is the SS set (for example, the USS set) for monitoring DCI format 0_2/1_2. For example, the priority of the SS set having a smaller (lower) search space ID may be determined to be higher than the priority of the SS set having a larger (higher) search space ID.

FIG.8is a diagram to show an example of the first prioritization of the SS sets according to the third aspect. AlthoughFIG.8shows SS sets #1 to #5 configured for the UE, the number, the IDs, and the like of SS sets configured for the UE are not limited to those shown in the figure. For example, SS set #0 may be configured for the UE.

For example, inFIG.8, SS set #1 is the CSS set, SS set #2 is the USS set for DCI format 0_0/1_0, SS set #3 is the USS set for DCI format 0_1/1_1, SS set #4 is the USS set for DCI format 0_2/1_2, and SS set #5 is the USS set for DCI format 0_2/1_2.

As shown inFIG.8, in the first prioritization, the priority of the SS sets may be configured based on the search space IDs, regardless of whether or not each SS set is the USS set for DCI format 0_2/1_2. For example, inFIG.8, higher priority is configured for the SS set having a smaller (lower) search space ID.

When at least some of the monitoring occasions of respective SS sets #1 to #5 overlap in the same time unit (for example, a slot), the UE may control monitoring of SS sets #1 to #5, based on the search space IDs. Specifically, the UE may prioritize monitoring of the SS set having a small search space ID over monitoring of the SS set having a search space ID.

Note that, inFIG.8, the priority of SS sets #1 to #5 is determined based on the search space IDs regardless of the search space types, but this is not restrictive. The priority of SS sets #1 to #5 may be determined based on the search space IDs and the search space types. For example, the priority of the CSS set may be determined to be higher than the priority of the USS set, and among the SS sets having the same search space type, the priority of the SS sets may be determined in ascending order or descending order of the search space IDs.

In the second prioritization, the priority of the SS sets may be determined based on whether or not each SS set is the SS set (for example, the USS set) for monitoring DCI format 0_2/1_2. For example, the priority of the SS set for monitoring DCI format 0_2/1_2 may be determined to be higher than the priority of the SS set for monitoring other DCI formats.

FIG.9is a diagram to show an example of the second prioritization of the SS sets according to the third aspect. With reference toFIG.9, differences fromFIG.8will mainly be described.

As shown inFIG.9, in the second prioritization, the priority of the SS sets may be configured based on whether or not each SS set is the USS set for DCI format 0_2/1_2. For example, inFIG.9, the priority of SS sets #4 and #5 each being the USS set for DCI format 0_2/1_2 is determined to be higher than the priority of other SS sets #1 to #3.

Further, in the second prioritization, among SS sets #4 and #5 each being the USS set for DCI format 0_2/1_2, the priority of SS sets #4 and #5 may be determined based on the search space IDs. For example, inFIG.9, SS set #4 having a smaller search space ID is prioritized over SS set #5 having a larger search space ID.

Similarly, among SS sets #1 to #3 other than the USS sets for DCI format 0_2/1_2, the priority of SS sets #1 to #3 may be determined based on the search space IDs. For example, inFIG.9, the priority of SS sets #1 to #3 is determined to be ascending order of the search space IDs.

When at least some of the monitoring occasions of respective SS sets #1 to #5 overlap in the same time unit (for example, a slot), the UE may control monitoring of SS sets #1 to #4, based on whether or not each SS set is the USS set for DCI format 0_2/1_2 and the search space IDs.

Note that, inFIG.9, the priority of SS sets #1 to #3 is determined based on the search space IDs regardless of the search space types, but this is not restrictive. The priority of SS sets #1 to #3 may be determined based on the search space IDs and the search space types. For example, the priority of the CSS set may be determined to be higher than the priority of the USS set, and among the SS sets having the same search space type, the priority of the SS sets may be determined in ascending order or descending order of the search space IDs.

As described above, in the third aspect, even when DCI format 0_2/1_2 is introduced, and the monitoring occasions of one or more SS sets configured for the UE overlap, monitoring can be appropriately controlled according to the priority of the SS sets.

Note that the first aspect and the second aspect may be combined together. For example, the SS configuration information ofFIG.2or the second SS configuration information ofFIG.4and the SS configuration information ofFIG.6orFIG.7may be combined together.

Specifically, when the pieces of SS configuration information ofFIGS.2and6are combined together, the DCI format information (for example, the RRC IE “dci-Formats”) in the USS set information (for example, the RRC IE “ue-Specific”) ofFIG.6may specify one of DCI format 0_0/1_0, DCI format 0_1/1_1, and DCI format 0_2/1_2.

Further, when the pieces of SS configuration information ofFIGS.2and7are combined together, the DCI format information (for example, the RRC IE “dci-Formats”) in the USS set information (for example, the RRC IE “ue-Specific”) ofFIG.7may specify one of DCI format 0_0/1_0, DCI format 0_1/1_1, DCI format 0_2/1_2, and DCI format 2_4.

Further, when the second SS configuration information ofFIG.4and the SS configuration information ofFIG.6are combined together, the CSS set information (for example, the RRC IE “common”) in the second SS configuration information (for example, the RRC IE “SearchSpace-v16”) ofFIG.4may include the DCI format 2_4 information (for example, the RRC IE “dci-Format2-4”).

Further, when the second SS configuration information ofFIG.4and the SS configuration information ofFIG.7are combined together, the DCI format information (for example, the RRC IE “dci-Formats”) in the USS set information (for example, the RRC IE “ue-Specific”) in the second SS configuration information (for example, the RRC IE “SearchSpace-v16”) ofFIG.4Bmay specify one of DCI format 0_0/1_0, DCI format 0_1/1_1, DCI format 0_2/1_2, and DCI format 2_4.

Further, the second aspect and the third aspect or the first to third aspects may be combined together. For example, although the SS set for DCI format 2_4 is not explicitly shown inFIGS.8and9, the priority of the SS set for DCI format 2_4 may also be determined according to the first or second prioritization.

The radio communication system1may support dual connectivity between a plurality of base stations in the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) where both of an MN and an SN are base stations (gNB) of NR).

The radio communication system1may include a base station11that forms a macro cell C1of a relatively wide coverage, and base stations12(12ato12c) that form small cells C2, which are placed within the macro cell C1and which are narrower than the macro cell C1. The user terminal20may be located in at least one cell. The arrangement, the number, and the like of each cell and user terminal20are by no means limited to the aspect shown in the diagram. Hereinafter, the base stations11and12will be collectively referred to as “base stations10,” unless specified otherwise.

The user terminal20may be connected to at least one of the plurality of base stations10. The user terminal20may 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 a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)). The macro cell C1may be included in FR1, and the small cells C2may be included in FR2. For example, FR1 may be a frequency band of 6 GHz or less (sub-6 GHz), and FR2 may be a frequency band which is higher than 24 GHz (above-24 GHz). Note that frequency bands, definitions and so on of FR1 and FR2 are by no means limited to these, and for example, FR1 may correspond to a frequency band which is higher than FR2.

The user terminal20may communicate using at least one of time division duplex (TDD) and frequency division duplex (FDD) in each CC.

The plurality of base stations10may be connected by a wired connection (for example, optical fiber in compliance with the Common Public Radio Interface (CPRI), the X2 interface and so on) or a wireless connection (for example, an NR communication). For example, if an NR communication is used as a backhaul between the base stations11and12, the base station11corresponding to a higher station may be referred to as an “Integrated Access Backhaul (IAB) donor,” and the base station12corresponding to a relay station (relay) may be referred to as an “IAB node.”

The base station10may be connected to a core network30through another base station10or directly. For example, the core network30may include at least one of Evolved Packet Core (EPC), 5G Core Network (5GCN), Next Generation Core (NGC), and so on.

The user terminal20may be a terminal supporting at least one of communication schemes such as LTE, LTE-A, 5G, and so on.

In the radio communication system1, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)), which is used by each user terminal20on a shared basis, a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)) and so on, may be used as downlink channels.

In the radio communication system1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)), which is used by each user terminal20on a shared basis, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)) and so on may be used as uplink channels.

User data, higher layer control information, System Information Blocks (SIBs) and so on are communicated on the PDSCH. User data, higher layer control information and so on may be communicated on the PUSCH. The Master Information Blocks (MIBs) may be communicated on the PBCH.

Lower layer control information may be communicated on the PDCCH. For example, the lower layer control information may include downlink control information (DCI) including scheduling information of at least one of the PDSCH and the PUSCH.

Uplink control information (UCI) including at least one of channel state information (CSI), transmission confirmation information (for example, which may be also referred to as Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK/NACK, and so on), and scheduling request (SR) may be communicated by means of the PUCCH. By means of the PRACH, random access preambles for establishing connections with cells may be communicated.

In the radio communication system1, a synchronization signal (SS), a downlink reference signal (DL-RS), and so on may be communicated. In the radio communication system1, 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), and so on may be communicated as the DL-RS.

In the radio communication system1, a sounding reference signal (SRS), a demodulation reference signal (DMRS), and so on may be communicated as an uplink reference signal (UL-RS). Note that DMRS may be referred to as a “user terminal specific reference signal (UE-specific Reference Signal).”

FIG.11is a diagram to show an example of a structure of the base station according to one embodiment. The base station10includes a control section110, a transmitting/receiving section120, transmitting/receiving antennas130and a transmission line interface140. Note that the base station10may include one or more control sections110, one or more transmitting/receiving sections120, one or more transmitting/receiving antennas130, and one or more transmission line interfaces140.

Note that, the present example primarily shows functional blocks that pertain to characteristic parts of the present embodiment, and it is assumed that the base station10may include other functional blocks that are necessary for radio communication as well. Part of the processes of each section described below may be omitted.

The control section110controls the whole of the base station10. The control section110can be constituted with a controller, a control circuit, or the like described based on general understanding of the technical field to which the present disclosure pertains.

The control section110may control generation of signals, scheduling (for example, resource allocation, mapping), and so on. The control section110may control transmission and reception, measurement and so on using the transmitting/receiving section120, the transmitting/receiving antennas130, and the transmission line interface140. The control section110may generate data, control information, a sequence and so on to transmit as a signal, and forward the generated items to the transmitting/receiving section120. The control section110may perform call processing (setting up, releasing) for communication channels, manage the state of the base station10, and manage the radio resources.

The transmitting/receiving section120may include a baseband section121, a Radio Frequency (RF) section122, and a measurement section123. The baseband section121may include a transmission processing section1211and a reception processing section1212. The transmitting/receiving section120can be constituted with a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitting/receiving circuit, or the like described based on general understanding of the technical field to which the present disclosure pertains.

The transmitting/receiving section120may be structured as a transmitting/receiving section in one entity, or may be constituted with a transmitting section and a receiving section. The transmitting section may be constituted with the transmission processing section1211, and the RF section122. The receiving section may be constituted with the reception processing section1212, the RF section122, and the measurement section123.

The transmitting/receiving antennas130can be constituted with antennas, for example, an array antenna, or the like described based on general understanding of the technical field to which the present disclosure pertains.

The transmitting/receiving section120may transmit the above-described downlink channel, synchronization signal, downlink reference signal, and so on. The transmitting/receiving section120may receive the above-described uplink channel, uplink reference signal, and so on.

The transmitting/receiving section120may form at least one of a transmit beam and a receive beam by using digital beam forming (for example, precoding), analog beam forming (for example, phase rotation), and so on.

The transmitting/receiving section120(transmission processing section1211) may perform the processing of the Packet Data Convergence Protocol (PDCP) layer, the processing of the Radio Link Control (RLC) layer (for example, RLC retransmission control), the processing of the Medium Access Control (MAC) layer (for example, HARQ retransmission control), and so on, for example, on data and control information and so on acquired from the control section110, and may generate bit string to transmit.

The transmitting/receiving section120(transmission processing section1211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, discrete Fourier transform (DFT) processing (as necessary), inverse fast Fourier transform (IFFT) processing, precoding, digital-to-analog conversion, and so on, on the bit string to transmit, and output a baseband signal.

The transmitting/receiving section120(RF section122) may perform modulation to a radio frequency band, filtering, amplification, and so on, on the baseband signal, and transmit the signal of the radio frequency band through the transmitting/receiving antennas130.

On the other hand, the transmitting/receiving section120(RF section122) may perform amplification, filtering, demodulation to a baseband signal, and so on, on the signal of the radio frequency band received by the transmitting/receiving antennas130.

The transmitting/receiving section120(reception processing section1212) may apply reception processing such as analog-digital conversion, fast Fourier transform (FFT) processing, inverse discrete Fourier transform (IDFT) processing (as necessary), filtering, de-mapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, the processing of the RLC layer and the processing of the PDCP layer, and so on, on the acquired baseband signal, and acquire user data, and so on.

The transmitting/receiving section120(measurement section123) may perform the measurement related to the received signal. For example, the measurement section123may perform Radio Resource Management (RRM) measurement, Channel State Information (CSI) measurement, and so on, based on the received signal. The measurement section123may measure a received power (for example, Reference Signal Received Power (RSRP)), a received quality (for example, Reference Signal Received Quality (RSRQ), a Signal to Interference plus Noise Ratio (SINR), a Signal to Noise Ratio (SNR)), a signal strength (for example, Received Signal Strength Indicator (RSSI)), channel information (for example, CSI), and so on. The measurement results may be output to the control section110.

The transmission line interface140may perform transmission/reception (backhaul signaling) of a signal with an apparatus included in the core network30or other base stations10, and so on, and acquire or transmit user data (user plane data), control plane data, and so on for the user terminal20.

Note that the transmitting section and the receiving section of the base station10in the present disclosure may be constituted with at least one of the transmitting/receiving section120, the transmitting/receiving antennas130, and the transmission line interface140.

Note that the transmitting/receiving section120transmits downlink control information. The transmitting/receiving section120may receive an uplink signal (for example, an uplink shared channel), and transmit a downlink signal (for example, a downlink shared channel). The transmitting/receiving section120transmits configuration information of a search space set. The transmitting/receiving section120may transmit configuration information (for example, UE-specific PDCCH information or cell-specific PDCCH information) of a downlink control channel.

FIG.12is a diagram to show an example of a structure of the user terminal according to one embodiment. The user terminal20includes a control section210, a transmitting/receiving section220, and transmitting/receiving antennas230. Note that the user terminal20may include one or more control sections210, one or more transmitting/receiving sections220, and one or more transmitting/receiving antennas230.

Note that, the present example primarily shows functional blocks that pertain to characteristic parts of the present embodiment, and it is assumed that the user terminal20may include other functional blocks that are necessary for radio communication as well. Part of the processes of each section described below may be omitted.

The control section210controls the whole of the user terminal20. The control section210can be constituted with a controller, a control circuit, or the like described based on general understanding of the technical field to which the present disclosure pertains.

The control section210may control generation of signals, mapping, and so on. The control section210may control transmission/reception, measurement and so on using the transmitting/receiving section220, and the transmitting/receiving antennas230. The control section210generates data, control information, a sequence and so on to transmit as a signal, and may forward the generated items to the transmitting/receiving section220.

The transmitting/receiving section220may include a baseband section221, an RF section222, and a measurement section223. The baseband section221may include a transmission processing section2211and a reception processing section2212. The transmitting/receiving section220can be constituted with a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitting/receiving circuit, or the like described based on general understanding of the technical field to which the present disclosure pertains.

The transmitting/receiving section220may be structured as a transmitting/receiving section in one entity, or may be constituted with a transmitting section and a receiving section. The transmitting section may be constituted with the transmission processing section2211, and the RF section222. The receiving section may be constituted with the reception processing section2212, the RF section222, and the measurement section223.

The transmitting/receiving antennas230can be constituted with antennas, for example, an array antenna, or the like described based on general understanding of the technical field to which the present disclosure pertains.

The transmitting/receiving section220may receive the above-described downlink channel, synchronization signal, downlink reference signal, and so on. The transmitting/receiving section220may transmit the above-described uplink channel, uplink reference signal, and so on.

The transmitting/receiving section220may form at least one of a transmit beam and a receive beam by using digital beam forming (for example, precoding), analog beam forming (for example, phase rotation), and so on.

The transmitting/receiving section220(transmission processing section2211) may perform the processing of the PDCP layer, the processing of the RLC layer (for example, RLC retransmission control), the processing of the MAC layer (for example, HARQ retransmission control), and so on, for example, on data and control information and so on acquired from the control section210, and may generate bit string to transmit.

The transmitting/receiving section220(transmission processing section2211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (as necessary), IFFT processing, precoding, digital-to-analog conversion, and so on, on the bit string to transmit, and output a baseband signal.

The transmitting/receiving section220(RF section222) may perform modulation to a radio frequency band, filtering, amplification, and so on, on the baseband signal, and transmit the signal of the radio frequency band through the transmitting/receiving antennas230.

On the other hand, the transmitting/receiving section220(RF section222) may perform amplification, filtering, demodulation to a baseband signal, and so on, on the signal of the radio frequency band received by the transmitting/receiving antennas230.

The transmitting/receiving section220(measurement section223) may perform the measurement related to the received signal. For example, the measurement section223may perform RRM measurement, CSI measurement, and so on, based on the received signal. The measurement section223may measure a received power (for example, RSRP), a received quality (for example, RSRQ, SINR, SNR), a signal strength (for example, RSSI), channel information (for example, CSI), and so on. The measurement results may be output to the control section210.

Note that the transmitting section and the receiving section of the user terminal20in the present disclosure may be constituted with at least one of the transmitting/receiving section220, the transmitting/receiving antennas230, and the transmission line interface240.

Note that the transmitting/receiving section220receives downlink control information. The transmitting/receiving section220may transmit an uplink signal (for example, an uplink shared channel), and receive a downlink signal (for example, a downlink shared channel). The transmitting/receiving section220receives configuration information (SS configuration information) of a search space set. The transmitting/receiving section220may receive configuration information (for example, UE-specific PDCCH information or cell-specific PDCCH information) of a downlink control channel.

The control section210may control monitoring of downlink control information (DCI) of a first format (for example, DCI format 0_2) other than formats 0_0 and 0_1 used for scheduling of an uplink shared channel and a second format (for example, DCI format 1_2) other than formats 1_0 and 1_1 used for scheduling of a downlink shared channel in the search space set configured based on the configuration information (first aspect).

The configuration information may include information for specifying one of the formats 0_0 and 1_0, the formats 0_1 and 1_1, and the first and second formats as a format of the DCI monitored in the search space set (for example,FIGS.2and4).

The configuration information may be for a specific search space set for monitoring the first and second formats (for example,FIG.3), or for the user terminal20in which monitoring of the first and second formats is assumed (for example,FIG.4).

The control section210may determine priority of the search space set, based on at least one of an ID of the search space set and whether or not the first and second formats are monitored in the search space set (third aspect).

The control section210may control monitoring of a third DCI format (for example, DCI format 2_4) including an indication of uplink preemption in the search space set configured based on the configuration information (second aspect).

Note that in the present disclosure, the words such as an apparatus, a circuit, a device, a section, a unit, and so on can be interchangeably interpreted. The hardware structure of the base station10and the user terminal20may be configured to include one or more of apparatuses shown in the drawings, or may be configured not to include part of apparatuses.

For example, although only one processor1001is shown, a plurality of processors may be provided. Furthermore, processes may be implemented with one processor or may be implemented at the same time, in sequence, or in different manners with two or more processors. Note that the processor1001may be implemented with one or more chips.

The processor1001controls the whole computer by, for example, running an operating system. The processor1001may be configured with a central processing unit (CPU), which includes interfaces with peripheral apparatus, control apparatus, computing apparatus, a register, and so on. For example, at least part of the above-described control section110(210), the transmitting/receiving section120(220), and so on may be implemented by the processor1001.

Furthermore, the processor1001reads programs (program codes), software modules, data, and so on from at least one of the storage1003and the communication apparatus1004, into the memory1002, and executes various processes according to these. As for the programs, programs to allow computers to execute at least part of the operations of the above-described embodiments are used. For example, the control section110(210) may be implemented by control programs that are stored in the memory1002and that operate on the processor1001, and other functional blocks may be implemented likewise.

The storage1003is a computer-readable recording medium, and may be constituted with, for example, at least one of a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disc (Compact Disc ROM (CD-ROM) and so on), a digital versatile disc, a Blu-ray (registered trademark) disk), a removable disk, a hard disk drive, a smart card, a flash memory device (for example, a card, a stick, and a key drive), a magnetic stripe, a database, a server, and other appropriate storage media. The storage1003may be referred to as “secondary storage apparatus.”

The communication apparatus1004is hardware (transmitting/receiving device) for allowing inter-computer communication via at least one of wired and wireless networks, and may be referred to as, for example, a “network device,” a “network controller,” a “network card,” a “communication module,” and so on. The communication apparatus1004may be configured to include a high frequency switch, a duplexer, a filter, a frequency synthesizer, and so on in order to realize, for example, at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, the above-described transmitting/receiving section120(220), the transmitting/receiving antennas130(230), and so on may be implemented by the communication apparatus1004. In the transmitting/receiving section120(220), the transmitting section120a(220a) and the receiving section120b(220b) can be implemented while being separated physically or logically.

Also, the base station10and the user terminals20may be structured 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), and so on, and part or all of the functional blocks may be implemented by the hardware. For example, the processor1001may be implemented with at least one of these pieces of hardware.

Here, numerology may be a communication parameter applied to at least one of transmission and reception of a given signal or channel. For example, numerology may indicate at least one of a subcarrier spacing (SCS), a bandwidth, a symbol length, a cyclic prefix length, a transmission time interval (TTI), the number of symbols per TTI, a radio frame structure, a particular filter processing performed by a transceiver in the frequency domain, a particular windowing processing performed by a transceiver in the time domain, and so on.

A bandwidth part (BWP) (which may be referred to as a “fractional bandwidth,” and so on) may represent a subset of contiguous common resource blocks (common RBs) for given numerology in a given carrier. Here, a common RB may be specified by an index of the RB based on the common reference point of the carrier. A PRB may be defined by a given BWP and may be numbered in the BWP.

Also, the information, parameters, and so on described in the present disclosure may be represented in absolute values or in relative values with respect to given values, or may be represented in another corresponding information. For example, radio resources may be specified by given indices.

Also, reporting of given information (for example, reporting of “X holds”) does not necessarily have to be reported explicitly, and can be reported implicitly (by, for example, not reporting this given information or reporting another piece of information).

At least one of a base station and a mobile station may be referred to as a “transmitting apparatus,” a “receiving apparatus,” a “radio communication apparatus,” and so on. Note that at least one of a base station and a mobile station may be device mounted on a moving object or a moving object itself, and so on. The moving object may be a vehicle (for example, a car, an airplane, and the like), may be a moving object which moves unmanned (for example, a drone, an automatic operation car, and the like), or may be a robot (a manned type or unmanned type). Note that at least one of a base station and a mobile station also includes an apparatus which does not necessarily move during communication operation. For example, at least one of a base station and a mobile station may be an Internet of Things (IoT) device such as a sensor, and the like.

Likewise, the user terminal in the present disclosure may be interpreted as base station. In this case, the base station10may have the functions of the user terminal20described above.

Actions which have been described in the present disclosure to be performed by a base station may, in some cases, be performed by upper nodes. In a network including one or a plurality of network nodes with base stations, it is clear that various operations that are performed to communicate with terminals can be performed by base stations, one or more network nodes (for example, Mobility Management Entities (MMEs), Serving-Gateways (S-GWs), and so on may be possible, but these are not limiting) other than base stations, or combinations of these.

“The maximum transmit power” according to the present disclosure may mean a maximum value of the transmit power, may mean the nominal maximum transmit power (the nominal UE maximum transmit power), or may mean the rated maximum transmit power (the rated UE maximum transmit power).