CN116325881A

CN116325881A - Base station device, terminal device, communication system, and communication method

Info

Publication number: CN116325881A
Application number: CN202180068835.9A
Authority: CN
Inventors: 高野裕昭
Original assignee: Sony Group Corp
Current assignee: Sony Group Corp
Priority date: 2020-10-15
Filing date: 2021-09-14
Publication date: 2023-06-23
Also published as: WO2022080059A1; JPWO2022080059A1

Abstract

The base station device (100) notifies the terminal device (200) of a plurality of resource cluster information corresponding to a plurality of different frequency bands, and the resource cluster information relates to a resource cluster set to correspond to the frequency band. The resource cluster information includes a plurality of resource set-related information including information related to a plurality of resources to be measured using a plurality of beams having different directivities. The base station device (100) notifies the terminal device (200) of association information that associates a plurality of resource cluster information.

Description

Base station device, terminal device, communication system, and communication method

Technical Field

The present disclosure relates to a base station apparatus, a terminal apparatus, a communication system, and a communication method.

Background

The radio access scheme and radio network of cellular mobile communication (hereinafter also referred to as "Long Term Evolution (long term evolution, LTE)", "LTE-Advanced (LTE-a)", "LTE-Advanced Pro (LTE-a Pro)", "5G (generation 5)", "new air interface (NR)", "new air interface access technology (NRAT)", "Evolved Universal Terrestrial Radio Access (EUTRA)", or "furthereutra (enhanced EUTRA)") are discussed in the third generation partnership project (3rd Generation Partnership Project:3GPP). In the following description, LTE includes LTE-A, LTE-A Pro and EUTRA, and NR includes NRAT and FEUTRA. In LTE and NR, a base station apparatus (base station) is also called eNodeB (evolved NodeB) in LTE, is also called gndeb in NR, and a terminal apparatus (mobile station, mobile station apparatus, terminal) is also called UE (User Equipment). LTE and NR are cellular communication systems in which areas covered by a plurality of base stations are arranged in a cell. A single base station may manage multiple cells.

For example, non-patent document 1 discloses beam scanning for performing communication using a plurality of beams having different directivities.

Prior art literature

Non-patent literature

Non-patent document 1: sony (Sony), considerations on the enhancement of multi-beam operation [ online ] (thinking about enhanced multi-beam operation [ on-line ]), 3GPP TSG RAN WG1#102e R1-2005560, month 8, 7, 2020, pages 1-10, [ search day: 2020.10.9] Internet < URL; https:// www.3gpp.org/ftp/TSG_RAN/WG1_RL1/TSGR1_102-e/Docs/R1-2005560.zip >

Disclosure of Invention

In order to perform communication using an optimal Beam, a Beam scanning (Beam scanning) process for selecting one Beam from a plurality of beams having different directivities is performed. The terminal device notifies the base station device of the measurement result of the transmitted measurement signal while performing beam scanning. The base station apparatus selects a beam to be used for communication based on the measurement result.

The terminal apparatus capable of communicating with the plurality of base station apparatuses performs the beam scanning process described above between the terminal apparatus and the plurality of base station apparatuses, respectively. In addition, in the case where one base station uses a plurality of frequency bands (e.g., BWP (Bandwidth Part), CC (Component Carrier )) in communication, beam scanning processing is performed for each of the plurality of frequency bands.

In this way, if the number of base station apparatuses and the number of frequency bands capable of communication increase, the processing load of the terminal apparatus increases when monitoring beam scanning.

Accordingly, in the present disclosure, an architecture capable of further reducing the processing load of beam scanning is provided.

The above-described problems and objects are only one of the problems and objects that can be solved or attained by the embodiments disclosed in the present specification.

According to the present disclosure, there is provided a base station apparatus. The base station apparatus notifies the terminal apparatus of a plurality of resource cluster information corresponding to a plurality of different frequency bands, the resource cluster information being related to a resource cluster set in correspondence with the frequency band. The resource cluster information includes a plurality of resource set-related information including information related to a plurality of resources to be measured using a plurality of beams having different directivities. The base station apparatus notifies the terminal apparatus of association information that associates the plurality of resource cluster information.

Drawings

Fig. 1 is a diagram showing an example of the overall configuration of a communication system according to an embodiment of the present disclosure.

Fig. 2 is a diagram for explaining BWP.

Fig. 3 is a diagram for explaining beam scanning.

Fig. 4 is a timing chart showing an example of the flow of the beam selection method performed by the base station apparatus and the terminal apparatus.

Fig. 5 is a diagram relating to a set of resources of a reference signal.

Fig. 6 is a diagram for explaining an example of the report configuration.

Fig. 7 is a block diagram showing an example of the configuration of a base station apparatus according to an embodiment of the present disclosure.

Fig. 8 is a block diagram showing an example of the structure of a terminal device according to an embodiment of the present disclosure.

Fig. 9 is a diagram showing one example of a reporting configuration of the embodiment of the present disclosure.

Fig. 10 is a diagram showing one example of a resource configuration of an embodiment of the present disclosure.

Fig. 11 is a diagram for explaining a relationship of a plurality of configurations of the embodiment of the present disclosure.

Fig. 12 is a diagram for explaining an example of a method of monitoring beam scanning by the terminal device according to the embodiment of the present disclosure.

Fig. 13 is a diagram for explaining another example of a method of monitoring beam scanning by the terminal device according to the embodiment of the present disclosure.

Fig. 14 is a diagram for explaining another example of a method of monitoring beam scanning by the terminal device according to the embodiment of the present disclosure.

Fig. 15 is a diagram showing one example of a report configuration of the embodiment of the present disclosure.

Fig. 16 is a timing chart showing one example of the flow of the beam scanning process of the embodiment of the present disclosure.

Fig. 17 is a diagram for explaining one example of QCL for reporting configuration according to the embodiment of the present disclosure.

Fig. 18 is a diagram for explaining an example of reporting by the terminal device according to the embodiment of the present disclosure.

Fig. 19 is a timing chart showing one example of the flow of the beam scanning process of the embodiment of the present disclosure.

Fig. 20 is a diagram for explaining the types of resources included in the resource configuration.

Fig. 21 is a timing chart showing an example of the flow of the beam scanning process of the embodiment of the present disclosure.

(description of the reference numerals)

1: a communication system; 20: a core network; 30: PDN;100: a base station apparatus; 200: a terminal device; 110. 210: an antenna section; 120. 220: a wireless communication unit; 130: a network communication unit; 140. 230: a storage unit; 150. 240: a control unit; 151: a setting unit; 152: a notification unit; 241: a measuring section; 242: and a notification unit.

Detailed Description

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In the present specification and the drawings, constituent elements having substantially the same functional configuration are denoted by the same reference numerals, and repetitive description thereof will be omitted.

In the present specification and drawings, similar components in the embodiments may be distinguished by different letters attached to the same symbols. However, unless otherwise specifically required, the same reference numerals are attached to the respective components.

One or more embodiments (including examples and modifications) described below can be implemented independently. On the other hand, the embodiments described below may be implemented with at least a part of the embodiments appropriately combined with at least a part of the other embodiments. These various embodiments can incorporate novel features which are mutually different. Therefore, these embodiments can help solve the objects and problems different from each other, and can obtain the effects different from each other.

The following procedure is described.

1. Start to

1.1. System configuration example

1.2. Correlation technique

2. Technical problem and summary of proposed technology

2.1. Technical problem

2.2. Summary of the proposed technology

3. Structural example

3.1. Structural example of base station apparatus

3.2. Structural example of terminal device

4. Technical features

4.1. Reporting configuration

4.2. Reporting relevance of configuration

4.3. Transmission of reference signal of base station apparatus

5. Modification examples

6. Summary

<1. Start >

<1.1. System configuration example >

Fig. 1 is a diagram showing an example of the overall configuration of a communication system 1 according to an embodiment of the present disclosure. As shown in fig. 1, the communication system 1 includes a base station apparatus 100 (100A and 100B), a terminal apparatus 200 (200A and 200B), a Core Network (Core Network) 20, and a PDN (Packet Data Network ) 30 (or DN (Data Network only)).

In addition, the devices in the figures may be regarded as logically devices. That is, a part of the apparatus of the figure may be implemented with a Virtual Machine (VM), a Container (Container), a Container engine (Docker), or the like, which are mounted on physically the same hardware.

In addition, a base station apparatus of LTE is sometimes referred to as an eNodeB (Evolved Node B) or an eNB. The base station apparatus of NR is sometimes referred to as NGRAN node (Next Generation RAN node, next-generation RAN node), gndeb, or gNB. In LTE and NR, a terminal apparatus (also referred to as a mobile station, a mobile station apparatus, or a terminal) is sometimes referred to as a UE (User Equipment). In addition, a terminal device is one type of communication device, and is also called a mobile station, a mobile station device, or a terminal.

In the present embodiment, the concept of a communication device includes not only a portable mobile device (terminal device) such as a portable terminal, but also a device provided in a structure or a mobile body. The structure and the moving object may be regarded as communication devices. In addition, the concept of a communication apparatus includes not only a terminal apparatus but also a base station apparatus. The communication device is one of a processing device and an information processing device. In addition, the communication apparatus may be referred to as a transmitting apparatus or a receiving apparatus in another words.

[ core network ]

The core network 20, in case of being EPC in LTE, can for example contain MME (Mobility Management Entity ), S-GW (Serving gateway), P-GW (PDN gateway), PCRF (Policy and Charging Rule Function, policy and charging rules function) and HSS (Home Subscriber Server ). The MME is a control node that processes signals of the control plane, and manages the mobile state of the terminal device. The S-GW is a control node that processes a signal of a user plane, and is a gateway device that switches a transmission path of user information. The P-GW is a control node that processes signals of the user plane, and is a gateway device that serves as a connection point between the core network 20 and the PDN 30. The PCRF is a control node that performs policy and charging related control such as QoS (Quality of Service ) for a bearer. The HSS is a control node that processes the participant data and performs service control. On the other hand, the core network 20 can contain AMF (Access and mobility Management Function ), SMF (Session Management Function, session management Function), UPF (User-Plane Function), PCF (Policy Control Function ), and UDM (Unified Data Management, unified data management) in the case of 5GC in NR. The AMF is a control node that processes a signal of the control plane, and manages the movement state of the terminal device 200. The SMF is a control node that processes a signal of a control plane, and manages a data transmission path. UPF is a control node that processes signals of a user plane, and manages a transmission path of user information. The PCF is a control node that performs policy-related control. UDM is a control node that processes participant data.

[ base station apparatus ]

The base station apparatus 100 is a wireless communication apparatus that performs wireless communication with the terminal apparatus 200. The base station apparatus 100 is one type of communication apparatus. The base station apparatus 100 is one type of information processing apparatus.

The base station apparatus 100 may be configured by a plurality of physical or logical apparatuses. For example, in the embodiment of the present disclosure, the base station apparatus 100 may be divided into a plurality of apparatuses of a BBU (Baseband Unit) and an RU (Radio Unit), and interpreted as an aggregate of these plurality of apparatuses. Additionally or alternatively, in embodiments of the present disclosure, the base station apparatus 100 may be either one or both of the BBU and the RU. The BBU and RU may be connected with a prescribed interface (e.g., eCPRI). Additionally or alternatively, an RU may also be referred to as a Remote Radio Unit (RRU) or a Radio DoT (RD). Additionally or alternatively, RU may correspond to a gNB-DU described below. The BBU may additionally or alternatively correspond to a gNB-CU described below. Additionally or alternatively, the RU may be a device integrally formed with the antenna. An antenna (e.g., an antenna integrally formed with an RU) included in the base station apparatus 100 may support MIMO (e.g., FD-MIMO), beamforming using an advanced antenna system. In the advanced antenna system, an antenna (for example, an antenna integrally formed with an RU) included in the base station apparatus 100 may include, for example, 64 transmission antenna ports and 64 reception antenna ports. The antenna mounted in the RU may be an antenna panel composed of one or more antenna elements, and the RU may be mounted with one or more antenna panels. For example, RU may mount 2 antenna panels of horizontally polarized antenna panels and vertically polarized antenna panels or 2 antenna panels of right-hand circularly polarized antenna panels and left-hand circularly polarized antenna panels. In addition, the RU may form and control an independent beam for each antenna panel.

In addition, the base station apparatus 100 may be connected to each other in plurality. One or more base station apparatuses 100 may be included in a radio access network (Radio Access Network: RAN). That is, the base station apparatus 100 may be referred to as RAN, RAN node, AN (Access Network), AN node only. The RAN in LTE is called EUTRAN (Enhanced Universal Terrestrial RAN ). The RAN in NR is called NGRAN. The RAN in W-CDMA (UMTS) is called UTRAN. The base station apparatus 100 of LTE is called an eNodeB (Evolved Node B) or eNB. That is, EUTRAN contains one or more enodebs (enbs). The base station apparatus 130 of NR is called a gnob or gNB. That is, the NGRAN contains one or more gnbs. Further, EUTRAN may contain a gNB (en-gNB) connected to a core network (EPC) in a communication system (EPS) of LTE. Likewise, the NGRAN may comprise a ng-eNB connected to a core network 5GC in a 5G communication system (5 GS). In addition or instead, the base station apparatus 100 may be referred to as a 3GPP access in the case of an eNB, a gNB, or the like. In addition or alternatively, the base station apparatus 100 may be a non-3 GPP Access in the case of being a wireless Access Point (Access Point). The base station apparatus 100 may also be an optical transmitter apparatus called RRH (Remote Radio Head ) in addition or instead. In addition or instead, when the base station apparatus 100 is a gNB, the base station apparatus 130 may be referred to as a combination of the foregoing gNB CU (Central Unit) and gNB DU (Distributed Unit) or any one of these. The gNB CU (Central Unit) hosts a plurality of upper layers (e.g., RRC, SDAP, PDCP) among the access layers for communication with the UE. On the other hand, the gNB-DU hosts a plurality of lower layers (e.g., RLC, MAC, PHY) among the access layers. That is, RRC signaling (e.g., various SIBs including MIB, SIB1, RRCSetup message, rrcrecnonfiguration message) among the later-described messages/information is generated by the gNB CU, and on the other hand, DCI, various physical channels (e.g., PDCCH, PBCH) described later may be generated by the gNB-DU. Or instead, among RRC signaling is for example IE: a portion of the configuration of cellGroupConfig, etc., may be generated by the gNB-DU and the remaining configuration generated by the gNB-CU. These configurations may be transceived over the F1 interface. The base station apparatus 100 may be configured to be able to communicate with other base station apparatuses 100. For example, when a plurality of base station apparatuses 100 are enbs or a combination of an eNB and an en-gNB, the base station apparatuses 100 may be connected to each other via an X2 interface. In addition or alternatively, in the case where a plurality of base station apparatuses 100 are gnbs or a combination of gn-enbs and gnbs, the apparatuses may be connected to each other via an Xn interface. In addition or instead, when the plurality of base station apparatuses 100 are a combination of a gNB CU (Central Unit) and a gNB DU (Distributed Unit), the apparatuses may be connected to each other through the F1 interface described above. The messages and information (information included in RRC signaling or DCI) described later can be communicated between the plurality of base station apparatuses 100 (for example, via X2, xn, and F1 interfaces).

Further, as described above, the base station apparatus 100 may be configured to manage a plurality of cells. The cell provided by the base station apparatus 100 is referred to as a serving cell. The serving Cell includes a PCell (Primary Cell) and an SCell (Secondary Cell). In the case of providing a dual connection (e.g., EUTRA-EUTRA dual connection, EUTRA-NR dual connection (ENDC), EUTRA-NR dual connection with 5GC, NR-EUTRA dual connection (NEDC), NR-NR dual connection) to a UE (e.g., terminal apparatus 200), PCell provided by MN (Master Node) and 0 or more scells are referred to as a Master cell group. Further, the serving Cell may also include a PSCell (Primary Secondary Cell (Primary secondary Cell) or Primary SCG Cell). That is, in the case of providing dual connectivity to a UE, PSCell provided by SN (Secondary Node) and 0 or more scells are referred to as Secondary Cell Group (SCG). Unless specifically set (e.g., PUCCH on SCell), physical Uplink Control Channel (PUCCH) is transmitted on PCell and PSCell, but not on SCell. In addition, radio link failure is also detected at the PCell and PSCell, but not at the SCell (may not be detected). Thus, PCell and PSCell have a special role among serving cells, and are therefore also referred to as special cells (spcells). In one cell, one downlink component carrier and one uplink component carrier may be associated. In addition, the system Bandwidth corresponding to one cell may be divided into a plurality of Bandwidth parts (Bandwidth parts). In this case, one or more bandwidth parts (BWP) may be set for the UE, one bandwidth part being used as an active BWP by the UE. In addition, radio resources (e.g., frequency band, numerology (subcarrier spacing), slot format (Slot configuration )) that can be used by the terminal apparatus 110 may be different for each cell, each component carrier, or each BWP.

[ terminal device ]

The terminal apparatus 200 is a wireless communication apparatus that performs wireless communication with the base station apparatus 100. The terminal device 200 is, for example, a mobile phone, a smart device (smart phone or tablet), a PDA (Personal Digital Assistant ), or a personal computer.

The terminal device 200 may perform side-link communication with other terminal devices 200. The terminal apparatus 200 may use an automatic retransmission technique such as HARQ (Hybrid Automatic Repeat reQuest ) when performing the side link communication. The terminal apparatus 200 may be capable of NOMA (Non Orthogonal Multiple Access, non-orthogonal multiple access) communication with the base station apparatus 100. The terminal apparatus 200 may be capable of NOMA communication in communication (side link) with other terminal apparatuses 200. In addition, the terminal apparatus 110 may be capable of LPWA (Low Power Wide Area ) communication with other communication apparatuses (e.g., the base station apparatus 100 and other terminal apparatuses 200). The wireless communication used by the terminal apparatus 200 may be wireless communication using millimeter waves. The wireless communication (including side link communication) used by the terminal device 200 may be wireless communication using radio waves or wireless communication (optical wireless) using infrared rays or visible light.

The terminal apparatus 200 may connect to a plurality of base station apparatuses 100 or a plurality of cells at the same time and perform communication. For example, in a case where one base station apparatus 100 can provide a plurality of cells, the terminal apparatus 200 uses a certain cell as pCell and other cells as scells, so that carrier aggregation can be performed. In addition, when one or more cells can be provided by each of the plurality of base station apparatuses 100, the terminal apparatus 200 uses one or more cells managed by one base station apparatus 100 (MN (e.g., meNB or MgNB)) as pCell or pCell and sCell, and uses one or more cells managed by the other base station apparatus 100 (SN (e.g., seNB or SgNB)) as pCell (PSCell) or pCell (PSCell) and sCell, whereby DC (Dual Connectivity ) can be achieved. DC may also be referred to as MC (Multi Connectivity, multiple connection).

In addition, when a communication area is supported via cells of different base station apparatuses 100 (cells having different cell identifiers or the same cell identifier), the base station apparatus 100 and the terminal apparatus 200 can communicate by bundling these cells by a carrier aggregation (CA: carrier Aggregation) technique, a dual Connectivity (DC: dual Connectivity) technique, or a Multi-Connectivity (MC) technique. Alternatively, the terminal apparatus 200 and the plurality of base station apparatuses 100 may communicate via a coordinated transmission/reception (CoMP: coordinated Multi-Point Transmission and Reception, coordinated multipoint transmission/reception) technique via cells of different base station apparatuses 100.

<1.2. Related art >

(1) BWP (Bandwidth Part, bandwidth section)

Fig. 2 is a diagram for explaining BWP. As shown in fig. 2, cc#1 contains a plurality of BWP (# 1 and # 2), and cc#2 contains a plurality of BWP (# 1 and # 2). In addition, in this specification, numerals after # denote indexes. Different CCs contain BWP that represent different BWP even if the index is the same. The BWP divides the CC, which is one operation bandwidth (operation band width), into a plurality of bandwidths. In each BWP, a different subcarrier spacing (Subcarrier spacing) can be set.

In the present embodiment, a plurality of BWP is described as a focus. However, the techniques of this disclosure can also be applied to the case of multiple CCs (Component Carrier, component carriers). CC refers to the frequency band of operation. Therefore, where illustrated as BWP in the present disclosure, it may be basically replaced with CC.

(2) Codebook-based beamforming

The base station apparatus 100 performs beamforming to communicate with the terminal apparatus 200, and thus, for example, the communication quality can be improved. As a method of beamforming, there are a method of generating a beam such as the tracking terminal device 200 and a method of selecting a beam such as the tracking terminal device 200 from among candidate beams. The former method takes computational cost every time a beam is generated and thus may not be employed in a cellular wireless communication system (e.g., 5G). On the other hand, the latter approach is also adopted in FD-MIMO (Full Dimension Multiple Input Multiple Output, full-dimension multiple input multiple output) of release 13 of 3GPP (Third Generation Partnership Project ). The latter approach is also referred to as codebook-based beamforming (codebook based beam forming).

In the codebook-based beamforming, the base station apparatus 100 prepares (i.e., generates) beams in all directions in advance, selects a beam suitable for the target terminal apparatus 200 from among the beams prepared in advance, and communicates with the terminal apparatus 200 using the selected beam. For example, when the base station apparatus 100 can perform communication in 360 degrees in the horizontal direction, 360 beams are prepared for each 1 degree, for example. In the case where the beams overlap with each other by half, the base station apparatus 100 prepares 720 kinds of beams. Regarding the vertical direction, the base station apparatus 100 prepares beams of 180 degrees from-90 degrees to +90 degrees, for example.

In addition, since the terminal apparatus 200 observes only (monitor) beams, it is necessary to know the existence of the codebook on the base station apparatus 100 side.

Hereinafter, a plurality of beams prepared in advance by the base station apparatus 100 will also be referred to as a beam group. Beam groups can be defined for each frequency band, for example. In addition, beam groups can be defined for each Rx/Tx beam or each downlink/uplink. In addition, a plurality of beams prepared or operated by the base station apparatus 100 may be associated with one cell (i.e., one cell may be configured with a plurality of beams). Alternatively, a plurality of beams prepared or operated by the base station apparatus 100 may correspond to a plurality of cells (that is, a plurality of cells may be configured with a plurality of beams).

(3) Beam scanning process

Beam scanning is being studied in which a measurement signal (known signal) is transmitted or received using each of a plurality of beams belonging to a beam group in order to select an optimal beam to be used for communication in NR. The measurement Signal is also called a Reference Signal (Reference Signal). When the measurement Signal is a downlink Signal, the measurement Signal may include SSB (Synchronization Signal/PBCH (Physical Broadcast Channel) block, synchronization Signal/PBCH (physical broadcast channel) block) or CSI-RS (Channel State Information-Reference Signal). Based on the measurement result of the measurement signals (i.e., the measurement signals of the respective beams) transmitted from the base station apparatus 100 while performing beam scanning, the terminal apparatus 200 can select an optimal transmission beam (hereinafter, also referred to as a transmission beam). An example of this is described with reference to fig. 3.

Fig. 3 is a diagram for explaining beam scanning. In the example shown in fig. 3, the base station apparatus 100 transmits a measurement signal while performing beam scanning (i.e., switching transmission beams) using the beam group 40. In the following, transmission while beam scanning is also referred to as beam scanning transmission. Then, the terminal apparatus 200 measures the measurement signal transmitted by beam scanning, and determines which transmission beam is most likely to be received. In this way, the terminal apparatus 200 selects the optimal transmission beam of the base station apparatus 100.

The side receiving the measurement signal transmitted by the measurement beam scanning notifies the transmission side of the measurement signal of the measurement result. The measurement results may contain information (e.g., beam identifier, time, preamble, etc.) indicating which transmit beam is optimal. The optimal transmission beam is, for example, a transmission beam having the highest reception power. The measurement result may include information indicating one transmission beam having the largest reception power, or may include information indicating the first K transmission beams having the largest reception power. The measurement results include, for example, identification information of a transmission beam (for example, an index of the beam) and information indicating the magnitude of the reception power of the transmission beam (for example, RSRP (Reference Signal Received Power, reference signal reception power)) in association with each other.

Fig. 4 is a timing chart showing an example of the flow of the beam selection method performed by the base station apparatus 100 and the terminal apparatus 200.

As shown in fig. 4, the base station apparatus 100 performs beam scanning transmission on a measurement signal for beam selection (step S11). Next, the terminal apparatus 200 performs measurement of a measurement signal for beam selection, and notifies the base station apparatus 100 of a measurement result (beam report) of the beam (step S12).

The measurement result includes, for example, information indicating a result of selecting an optimal transmission beam (e.g., an index associated with an optimal beam) of the base station apparatus 100. Next, the base station apparatus 100 transmits a measurement signal (for example, CSI-RS) for obtaining channel quality using the selected optimal beam (step S13). Next, the terminal apparatus 200 notifies the base station apparatus 100 of the channel quality obtained based on the measurement result of the measurement signal (step S14).

Then, the base station apparatus 100 transmits the user information to the terminal apparatus 200 using the communication parameter based on the notified channel quality (step S15). From the above, regarding the beam report, the measurement result of the measurement signal for beam selection received by the base station apparatus 100 or the terminal apparatus 200 is transmitted to the terminal apparatus 200 or the base station apparatus 100.

Fig. 5 is a diagram relating to a set of resources of a reference signal. The beam used for beam scanning is transmitted with directivity to a reference signal that is a known signal. Accordingly, the terminal apparatus 200 can discriminate the beam using the Resource (RS Resource) for transmitting the reference signal. The RS resources are specified with frequency and time resources.

The base station apparatus 100 can provide one beam using the resources of one reference signal. For example, as shown in fig. 5, if 4 resources are prepared, the base station apparatus 100 can perform beam scanning corresponding to different 4 directions. In this way, the resource for the base station apparatus 100 to set the reference signal to the terminal apparatus 200 is referred to as a Configuration (Configuration) for setting the RS.

The plurality of resources is collectively referred to as a resource set. For example, one set of 4 resources provides beam scanning corresponding to 4 directions. The base station apparatus 100 may register the plurality of RS resource sets as a list, and cause the terminal apparatus 200 to report the observation results of all of the plurality of RS resource sets registered in the list. In addition, a list containing a plurality of RS resource sets is also referred to as an RS resource set list or resource cluster.

(4) Reporting configuration

The base station apparatus 100 performs setting (arrangement) for the terminal apparatus 200 to observe the beam scanning described above and report the observation result to the terminal apparatus 200 in advance. This setting is called reporting configuration and is described in section 6.3.2 of 3GPP standard specification release 16TS38.331.

Fig. 6 is a diagram for explaining an example of the report configuration. The reporting configuration shown in fig. 6 contains "cell ID", "resource configuration ID", and "reporting period".

The "cell ID" indicates a resource to which CC is configured as a measurement object of beam scanning. The "resource configuration ID" indicates which resource configuration is monitored and reported. The "reporting period" indicates a period of reporting by the terminal apparatus 200.

In addition, the resource configuration shown in fig. 6 includes "reference signal resource set list" and "BWPID".

The "reference signal resource set list" represents a resource cluster as a measurement object. The resource cluster includes a plurality of downlink reference signal (DL RS) resource sets composed of a plurality of RS resource sets. "BWP ID" means BWP configured with a resource cluster.

In this way, in the report configuration, a resource configuration is set as to which Cell (for example, CC) is observed. In the resource allocation, it is set in which BWP the resource to be observed is allocated, and a resource set in which the resource of the RS (Reference Signal) is set as a set is set as a list.

Accordingly, the terminal apparatus 200 reports which of the preferred reference signals is after observing a set of a plurality of Reference Signals (RSs) configured in one BWP among one CC based on one reporting configuration. Thus, in the conventional reporting configuration, it is assumed that one BWP reference signal is observed.

Technical problem and summary of proposed technology

<2.1. Technical problem >

As described above, the base station apparatus 100 performs one report configuration for one BWP. The base station apparatus 100 can perform communication using a plurality of BWP. In the case where the base station apparatus 100 uses a plurality of BWPs, the base station apparatus 100 performs beam scanning for each BWP used. Accordingly, the base station apparatus 100 performs reporting configuration for each of the plurality of BWP, and the terminal apparatus 200 must observe beam scanning for each of the plurality of BWP, and the processing load of the beam scanning processing becomes large.

In addition, a plurality of base station apparatuses 100 can be disposed around the terminal apparatus 200. In this case, the terminal apparatus 200 must perform beam scanning processing for each of the plurality of base station apparatuses 100, and when the number of base station apparatuses 100 capable of communicating with the terminal apparatus 200 increases, the beam scanning processing load of the terminal apparatus 200 increases.

As described above, the conventional technology has the following problems: when the number of base station apparatuses 100 capable of communicating with the BWP and terminal apparatus 200 for communication increases, the processing load of beam scanning increases. Accordingly, in the present disclosure, an architecture capable of further reducing the processing load of beam scanning is proposed.

<2.2. Summary of proposed technology >

Accordingly, in the technology of the present disclosure, the base station apparatus 100 notifies the terminal apparatus 200 of a plurality of resource cluster information (for example, a resource set list) related to the resource clusters set for each BPW. The resource group information includes a plurality of resource group related information, and the resource group includes a plurality of resources to be scanned (for example, beam scanning) using a plurality of beams having different directivities.

The base station apparatus 100 also notifies association information for associating a plurality of resource cluster information to the terminal apparatus 200. The association information is, for example, information indicating the similarity of a plurality of resource clusters. The similarity of the resource clusters is described later.

In this way, the terminal apparatus 200 performs beam scanning processing on the plurality of resource clusters based on the association information, and can reduce the processing load by omitting beam scanning processing on a part of the resource clusters, for example. The beam scanning process for a plurality of resource clusters based on the association information will be described later.

Structural example

<3.1. Structural example of base station apparatus >

Fig. 7 is a block diagram showing an example of the configuration of the base station apparatus 100 according to the embodiment of the present disclosure. Referring to fig. 7, the base station apparatus 100 includes an antenna unit 110, a wireless communication unit 120, a network communication unit 130, a storage unit 140, and a control unit 150.

(1) Antenna portion 110

The antenna unit 110 radiates the signal output from the wireless communication unit 120 as a radio wave in space. The antenna unit 110 converts the radio wave in space into a signal, and outputs the signal to the wireless communication unit 120. The antenna unit 110 of the present embodiment may have a plurality of antenna elements to form a beam.

(2) Wireless communication unit 120

The wireless communication unit 120 transmits and receives signals. For example, the wireless communication unit 120 transmits a downlink signal to the terminal device 200 and receives an uplink signal from the terminal device 200. The wireless communication unit 120 of the present embodiment can form a plurality of beams by the antenna unit 110 to communicate with the terminal device 200.

(3) Network communication unit 130

The network communication unit 130 transmits and receives information. For example, the network communication unit 130 transmits information to other nodes and receives information from other nodes. For example, the other nodes include other base station apparatuses 100 and core network nodes.

(4) Storage unit 140

The storage unit 140 temporarily or permanently stores programs and various data for the operation of the base station apparatus 100.

(5) Control unit 150

The control unit 150 controls the operation of the entire base station apparatus 100, and provides various functions of the base station apparatus 100. The control unit 150 includes a setting unit 151 and a notification unit 152.

The setting unit 151 has a function of performing setting related to communication of the terminal device 200. For example, the setting unit 151 performs setting related to beam scanning processing, and determines the report configuration and the content of the resource configuration. Then, the notification unit 152 notifies the setting information of the setting unit 151 to the terminal device 200.

The control unit 150 may include other components than these components. That is, the control unit 150 can perform operations other than those of the components.

<3.2. Structural example of terminal device >

Fig. 8 is a block diagram showing an example of the structure of the terminal apparatus 200 according to the embodiment of the present disclosure. Referring to fig. 18, the terminal device 200 includes an antenna unit 210, a wireless communication unit 220, a storage unit 230, and a control unit 240.

(1) Antenna section 210

The antenna unit 210 radiates the signal output from the wireless communication unit 220 as a radio wave in space. The antenna unit 210 converts the radio wave in space into a signal, and outputs the signal to the wireless communication unit 220. The antenna unit 210 of the present embodiment may have a plurality of antenna elements to form a beam.

(2) Radio communication unit 220

The wireless communication unit 220 transmits and receives signals. For example, the wireless communication unit 220 receives a downlink signal from the base station apparatus 100 and transmits an uplink signal to the base station apparatus 100. The wireless communication unit 220 of the present embodiment can form a plurality of beams by the antenna unit 210 and communicate with the base station apparatus 100.

Here, in the present embodiment, the antenna unit 210 and the wireless communication unit 220 are configured to include a plurality of antenna panels (not shown). The terminal device 200 performs communication by forming a plurality of beams for each antenna panel, for example.

(3) Storage unit 230

The storage unit 230 temporarily or permanently stores programs and various data for the operation of the terminal device 200.

(4) Control unit 240

The control unit 240 controls the operation of the entire terminal device 200, and provides various functions of the terminal device 200. The control unit 240 includes a measurement unit 241 and a notification unit 242.

The measurement unit 241 performs measurement of beam scanning based on the setting information received from the base station apparatus 100. The reporting unit 242 reports the measurement result of the beam scanning based on the report configuration.

The control unit 240 may include other components other than these components. That is, the control unit 240 may perform operations other than those of the components.

Technical characteristics >

<4.1 reporting configuration >

As described above, the number of base station apparatuses 100, CCs for communication, and BWP disposed around the terminal apparatus 200 increases, and thus the number of beam scans monitored by the terminal apparatus 200 is predicted to increase. However, the conventional report is set to report the result of monitoring the resource group corresponding to one BWP to the terminal apparatus 200. In addition, the resource cluster includes more than 1 reference signal resource (Reference Signal Resource) for more than 1 beam sweep. The reference signal resource is composed of reference signals such as CSI-RS and SSB (SS/PBCH block ).

Therefore, in the case where the terminal apparatus 200 observes and reports a plurality of beam scans, the result of observing the RS resource is also reported to the base station apparatus 100 for each individual BWP included in the individual CC. Even if the terminal apparatus 200 observes a plurality of beam scans corresponding to a plurality of cells and a plurality of BWP, it is necessary to report a report of the observation result to the base station apparatus 100 for each of the plurality of cells and the plurality of BWP. Therefore, there is a problem that the setting of the report to be managed by the terminal apparatus 200 increases. If the managed report setting becomes large, it is necessary to allocate the frequency and time resources of the uplink to each report, and there also occurs a problem that the overhead of the report becomes large.

On the other hand, there is also a demand for reducing the number of beam scans observed by the terminal apparatus 200. If the number of beam scans to be monitored increases, the operation time (processing load) of the terminal device 200 increases, and the power consumption of the terminal device 200 increases. Therefore, there is a demand for reducing the observation opportunity of beam scanning of the terminal apparatus 200.

Therefore, it is necessary to solve the above problems with less setting change while obtaining matching performance of settings (for example, report configuration and resource configuration) related to conventional beam scanning.

(reporting configuration comprising multiple frequency bands)

Therefore, in the present disclosure, in order to solve the above-described problem, the number of cell IDs or BWPs to which the resource configuration included in one report belongs is set to be plural. For example, the base station apparatus 100 sets a report configuration including 3 cell IDs or BWP to the terminal apparatus 200. In addition, the cell ID means the ID of the CC.

Conventionally, when observing beam scanning in 3 CCs or BWP, the terminal apparatus 200 receives 3 reporting arrangements and performs 3 reporting after monitoring beam scanning in each CC or BWP.

In another aspect, in the techniques of this disclosure, multiple resource configurations are included in one reporting configuration. In addition, CCs and BWP can be set for each of a plurality of resource configurations.

At this time, the base station apparatus 100 includes a plurality of resource configurations providing substantially the same beam scanning in one reporting configuration.

Here, providing substantially the same beam scanning means that the same result is expected regardless of which one of the plurality of resource configurations is monitored for the beam scanning provided.

That is, in the case where a plurality of resource configurations are included in one report, it can be said that the plurality of resource configurations provide substantially the same beam scanning as each other.

Thus, the correlation of resource configurations providing substantially the same beam scanning is defined by the term "QCL (Quasi co-location) for Resource Set List in Resource Configuration (QCL for resource set list in resource configuration)".

Here, in the NR specification, 3GPP standard release 15 is also defined by the term QCL. QCL in this case means that one resource has approximately the same beam characteristics. On the other hand, "QCL for resource set list in resource configuration" defined in the present disclosure means that the resource set list included in the resource configuration provides beam characteristics that are approximately the same.

Thus, in this disclosure, the similarity (or association, proximity, similarity) of beam characteristics provided by the resource set list comprised by the plurality of resource configurations is expressed as "QCL for the resource set list in the resource configuration".

Fig. 9 is a diagram showing one example of a reporting configuration of the embodiment of the present disclosure. The reporting configuration (Report Configuration) shown in fig. 9 includes "QCL for resource set list in resource configuration" and "UL resource for reporting".

UL resources for reporting "means resources of the uplink for reporting by the terminal apparatus 200.

"QCL for resource set list in resource configuration" means a resource configuration of a relationship of QCL for resource set list in resource configuration. Thus, in the report configuration of the present disclosure, "QCL for resource set list in resource configuration" is included as association information (similarity information) that associates information (resource configuration) related to the resource set list.

Specifically, in the QCL for resource set list in the resource configuration, a plurality of "cell IDs" and "resource configuration IDs" are contained. In fig. 9, "QCL for resource set list in resource allocation" includes cell IDs (1) to (3) and resource allocation IDs (1) to (3).

Here, the "cell ID" indicates an ID of the CC on which the resource to be measured is disposed. In addition, the "resource configuration ID" indicates an ID of a resource configuration that is a monitoring and reporting object.

Fig. 10 is a diagram showing one example of a resource configuration of an embodiment of the present disclosure. Fig. 10 shows the resource configuration IDs (1) to (3) included in the QCL for resource set list in the "resource configuration" of fig. 9.

In the resource configuration ID (1), a "reference signal resource set list" and a "BWP ID" are contained. The "reference signal resource set list" represents a resource cluster as a measurement object. The resource cluster includes a plurality of downlink reference signal (DL RS) resource sets each including a plurality of RS resource sets. "BWP ID" means BWP configured with a resource cluster.

In the resource allocation IDs (2), (3), the "reference signal resource set list" and the "BWP ID" are also contained.

As shown in fig. 11, a plurality of (3 in fig. 11) resource configurations are included in one report configuration.

In addition, one resource configuration includes a plurality of (X in fig. 11) RS resource set configurations (RS Resource Set Configuration) as a resource set list.

A plurality (Y in fig. 11) of RS resource configurations (RS Resource Configuration) are included in one RS resource set configuration.

In this way, by including a plurality of resource configurations in one report configuration, the number of report configurations managed by the terminal device 200 can be reduced, and the overhead of reporting can be further reduced.

(measurement method)

Next, a method of the terminal apparatus 200 performing measurement of resources based on a plurality of resource configurations included in one report configuration will be described.

(method 1) terminal device 200 selects a measurement object

First, as a method of measuring resources based on a plurality of resource configurations, there is a method in which the terminal apparatus 200 selects 1 from among the plurality of resource configurations to monitor.

In this case, the terminal apparatus 200 selects 1 from among the plurality of resource configurations, and performs measurement of the resources of the resource set list included in the selected resource configuration. The terminal device 200 reports the measurement result.

That is, the terminal apparatus 200 performs resource measurement with at least one of a plurality of resource configurations included in one reporting configuration. The terminal apparatus 200 returns one report corresponding to the plurality of resource configurations included in the one report configuration to the base station apparatus 100.

As described above, the plurality of resource configurations included in one reporting configuration satisfy the correlation of "QCL for resource set list in resource configuration". That is, among a plurality of resource configurations included in one reporting configuration, the same result is expected regardless of which beam scanning is provided for monitoring.

Therefore, the terminal apparatus 200 can select at least one of the plurality of resource configurations and report the monitoring result of the beam scanning to the base station apparatus 100. This reduces the number of beam scans monitored by the terminal device 200, and reduces the processing load of the terminal device 200.

The number of beam scans monitored by the terminal apparatus 200 may be 1 or a plurality of beam scans. The terminal apparatus 200 can arbitrarily select the number of beam scans to be monitored based on the processing capability of the apparatus and the like.

(method 2) monitoring resources of different resource configurations

The terminal apparatus 200 may select a part of the plurality of resources included in each of the plurality of resource configurations and monitor beam scanning.

Fig. 12 is a diagram for explaining an example of a method of monitoring beam scanning by the terminal apparatus 200 according to the embodiment of the present disclosure. Here, one beam report includes 3 resource configurations (1) to (3)).

As shown in fig. 12, for example, 4 resources #1 to #4 are included in the RS resource set included in the resource allocation (1). In addition, the RS resource set included in the resource allocation (2) includes 4 resources #1 to #4. Although not shown, in the resource allocation (3), 4 resources #1 to #4 may be similarly included in the RS resource set.

The terminal apparatus 200 measures a part of the resource configuration (1), for example, the first half of the resources #1, #2. The terminal apparatus 200 measures a part of the resource allocation (2), for example, the latter half of the resources #3, #4.

The terminal apparatus 200 notifies the base station apparatus 100 of the measurement results of the resources #1, #2 of the resource configuration (1) and the measurement results of the resources #3, #4 of the resource configuration (2).

In addition, in the case where the number of receivable BWP pieces by the terminal apparatus 200 is 1, the terminal apparatus 200 sometimes frequently switches BWP pieces and receives them. In this case, the terminal apparatus 200 sometimes switches BWP on the way of observing the resource set of one resource configuration, and beam scanning of one resource configuration in one BWP is not completed.

As described above, the terminal apparatus 200 selects and monitors a part of the resources included in the plurality of resource configurations, and can observe the monitoring of the resources of the BWP of the switching destination even when the BWP is switched in this manner.

For example, in fig. 12, while terminal apparatus 200 monitors resources #1, #2 of BWP (1) included in resource configuration (1), the received BWP is switched from BWP (1) to BWP (2) included in resource configuration (2). In this case, the terminal apparatus 200 monitors the resources #3, #4 of the BWP (2) included in the resource configuration (2), and thereby continues the monitoring of the beam scanning. The terminal device 200 manages the monitoring result of the beam scanning in the resource configuration (1) and the monitoring result of the beam scanning in the resource configuration (2) as the monitoring result in one resource configuration.

Accordingly, even when the received BWP is switched, the terminal apparatus 200 can continue monitoring the beam scanning, and can appropriately manage the monitoring result. Therefore, the processing load of the terminal apparatus 200 can be reduced.

(method 3) reporting the results of the monitoring during the fixed period

The terminal apparatus 200 may report the measurement result of at least one of the plurality of resource configurations within a predetermined period.

Fig. 13 is a diagram for explaining another example of a method of monitoring beam scanning by the terminal apparatus 200 according to the embodiment of the present disclosure. Here, it is assumed that one beam report includes 3 resource configurations (1) to (3)).

The terminal apparatus 200 is configured to measure beam scanning of the RS resource set included in 2 resource configurations among the 3 resource configurations for a predetermined period T1. For example, in fig. 13, the terminal apparatus 200 monitors the RS resource sets of the resource configurations (1) and (2) among the resource configurations (1) to (3) for a predetermined period T1, and does not monitor the resource configuration (3).

In this case, the terminal apparatus 200 reports based on the measurement results of the resource configurations (1) and (2) performed in the predetermined period T1. Alternatively, the terminal apparatus 200 may report one of the measurement results of the resource allocation (1) and (2) performed in the predetermined period T1 to the base station apparatus 100.

(method 4) reporting the most recent measurement results

The terminal apparatus 200 may report the monitoring result of the completion of the timing closest to the reporting timing among the monitoring results of the beam scanning of the plurality of resource configurations.

Fig. 14 is a diagram for explaining another example of a method of monitoring beam scanning by the terminal apparatus 200 according to the embodiment of the present disclosure. Here, it is assumed that one beam report includes 3 resource configurations (1) to (3)).

As shown in fig. 14, the terminal apparatus 200 monitors the RS resource sets of the resource configurations (1) and (2) among the resource configurations (1) to (3) in the order of (1) and (2) until reporting to the base station apparatus 100.

In this case, the terminal apparatus 200 notifies the base station apparatus 100 of the monitoring result of the resource configuration (2) completed at the timing (time t 1) nearest to the timing (time t 2) at which the report is made as a report.

(indication of reporting method)

The terminal apparatus 200 selects any one of the methods (method 1) to (method 4) described above, and monitors and reports beam scanning. Alternatively, the terminal apparatus 200 may report by one of the methods (method 1) to (method 4) described above based on the instruction from the base station apparatus 100.

In the report configuration shown in fig. 15, "report methods from { method (1), method (2), method (3), method (4) }, are added on the basis of the content of the report configuration shown in fig. 9. The methods (1) to (4) correspond to the methods (1) to (4) described above, respectively.

The base station apparatus 100 specifies the reporting method of the terminal apparatus 200 by any of the specifying methods (1) to (4).

(Beam scanning processing)

An example of the beam scanning process of the embodiment of the present disclosure will be described with reference to fig. 16.

As shown in fig. 16, the base station apparatus 100 notifies the terminal apparatus 200 of report settings (report configuration) including a resource setting group (a plurality of resource configurations) (step S101).

Next, the base station apparatus 100 notifies the terminal apparatus 200 of the resource setting (1) (resource configuration (1)) included in the report setting (step S102).

Similarly, the base station apparatus 100 notifies the terminal apparatus 200 of the resource setting (2) (resource configuration (2)) and the resource setting (3) (resource configuration (3)) included in the report setting (steps S103, S104).

Next, the base station apparatus 100 performs beam scanning transmission of Reference Signals (RSs) for a resource set group (a plurality of resource configurations) (step S105).

The terminal apparatus 200 notifies the measurement result of the beam as the monitoring result of the beam scanning (step S106).

<4.2. Report relevance of configuration >

In the above <4.1. Report configuration >, the case where a plurality of resource configurations are included in one report configuration is described. This allows the terminal apparatus 200 to select the resources for the monitored beam scanning, and allows the terminal apparatus 200 to have a higher degree of freedom in selecting the resources. In addition, the terminal device 200 selects the monitored resources, so that the number of monitored resources of the terminal device 200 can be reduced, and the processing load of the terminal device 200 can be reduced.

Here, description will be given of a case where the base station apparatus 100 sets the association of the plurality of report arrangements, in other words, information on the relationship of the resource arrangements included in each of the plurality of report arrangements.

The base station apparatus 100 notifies the terminal apparatus 200 of information indicating a plurality of reporting configurations, the mutual correlation of which is "QCL for reporting configuration", as association information associating the plurality of reporting configurations. That is, the base station apparatus 100 notifies the terminal apparatus 200 of "QCL for reporting configuration" as similarity information indicating the similarity of the plurality of reporting configurations.

Here, the correlation is "QCL for reporting configuration" means that characteristics of beams provided by resource configurations included in each of the plurality of reporting configurations are substantially the same.

That is, the correlation of resource configurations with each other is represented by the above-described "QCL for resource set list in resource configuration", and the correlation of reporting configurations with each other is represented by "QCL for reporting configuration".

In other words, the report configurations respectively including the resource configurations as the relation of "QCL for resource set list in the resource configurations" are denoted by "QCL for report configuration".

As shown in fig. 17, the "QCL for reporting configuration" includes a plurality of reporting configurations related to the QCL for reporting configuration. In fig. 17, "QCL for reporting configuration" includes 3 reporting configurations (1) to (3).

By setting the correlation between a plurality of reporting arrangements in the base station apparatus 100 in this way, one reporting arrangement itself can follow the conventional description shown in fig. 6, for example.

In addition, the terminal device 200, which receives the QCL for reporting configuration, monitors beam scanning provided by the resource configuration contained in at least one of the plurality of reporting configurations. The terminal device 200 notifies the base station device 100 of the monitoring result as the monitoring result of all the resource allocation.

For example, as shown in fig. 17, the "QCL for reporting configuration" includes 3 reporting configurations (1) to (3). At this time, the terminal apparatus 200 that receives the QCL for reporting configuration monitors, for example, the beam scan (1) provided by the RS resource configuration (1) included in the reporting configuration (1).

The terminal apparatus 200 notifies the base station apparatus 100 of the monitoring result of the beam scanning (1) as reports corresponding to the report configurations (1) to (3).

Since the report configuration is a setting of one report for the terminal apparatus 200, the terminal apparatus 200 preferably notifies the base station apparatus 100 of one report for one report configuration. Therefore, the terminal apparatus 200 is configured to perform reporting itself for all the reporting configurations even when monitoring beam scanning corresponding to at least one of the plurality of reporting configurations.

Fig. 18 is a diagram for explaining an example of reporting by the terminal apparatus 200 according to the embodiment of the present disclosure.

As shown in fig. 18, the terminal apparatus 200 includes information on beam scanning monitored by "replacement" in addition to "CRI" and "RSRP" and reports the information to the base station apparatus 100.

"CRI" of fig. 18 indicates the ID of the preferred RS resource. Here, the preferred RS resource refers to a resource corresponding to a beam having the highest reception power as a result of performing beam scanning. The number of RS resources is not limited to 1, and K resources may be included in the report in the order of the higher received power. "RSRP" represents the received power of the reference signal received through the resource denoted by "CRI".

"substitute" means a reporting configuration corresponding to the monitored beam scan. That is, "replacement" is information indicating that the resource configuration is monitored instead.

The terminal apparatus 200 includes an ID (report ID) of a port configuration including a replaced resource configuration as "replacement= { report ID }, thereby indicating replacement with the report configuration of the report ID. In addition, when the report configuration is not replaced, the "replacement" is set to be blank (blank).

As described above, for example, the "QCL for reporting configuration" includes 3 reporting configurations (1) to (3). At this time, the terminal apparatus 200 that has received the QCL for reporting configuration monitors, for example, the beam scan (1) provided by the RS resource configuration (1) contained in the reporting configuration (1).

At this time, the terminal apparatus 200 notifies the base station apparatus 100 of a report including the monitoring result by the beam scanning (1) and the report ID of the report configuration (1) as reports corresponding to the report configurations (2) and (3).

The base station apparatus 100 is notified of a report including the monitoring result by the beam scanning (1) but not including the report ID as a report corresponding to the report configuration (1).

An example of beam scanning processing according to the embodiment of the present disclosure will be described with reference to fig. 19. Fig. 19 is a timing chart showing one example of the flow of the beam scanning process of the embodiment of the present disclosure.

As shown in fig. 19, the base station apparatus 100 notifies the terminal apparatus 200 of the report setting (report configuration) (1) (step S201). The base station apparatus 100 notifies the terminal apparatus 200 of the resource setting (1) (resource configuration (1)) included in the report setting (1) (step S202).

The base station apparatus 100 notifies the terminal apparatus 200 of the report setting (report configuration) (2) (step S203). The base station apparatus 100 notifies the terminal apparatus 200 of the resource setting (2) (resource allocation (2)) included in the report setting (2) (step S204).

The base station apparatus 100 notifies the terminal apparatus 200 of the report setting (report configuration) (3) (step S205). The base station apparatus 100 notifies the terminal apparatus 200 of the resource setting (3) (resource allocation (3)) included in the report setting (3) (step S206).

The base station apparatus 100 notifies the terminal apparatus 200 of the similarity information (QCL for report configuration) of the plurality of report settings (step S207).

Next, the base station apparatus 100 performs beam scanning transmission of Reference Signals (RSs) for a resource set group (a plurality of resource configurations) (step S208).

The terminal apparatus 200 performs measurement of one of 3 resource settings (resource allocation (1) to (3)) (step S209). Here, the measurement of beam scanning in the resource configuration (1) is performed.

The terminal apparatus 200 reports the beam measurement result of the resource configuration (1) (hereinafter, also referred to as beam reporting (1)) by using the uplink resource indicated by the report setting (1) (step S210).

The terminal device 200 performs beam reporting (1) by reporting the uplink resource indicated by (2) (step S211), and performs beam reporting (1) by reporting the uplink resource indicated by (3) (step S212).

<4.3. Transmission of reference Signal of base station apparatus >

With the above-described report configuration, the number of beam scans monitored by the terminal apparatus 200 can be reduced. However, the base station apparatus 100 needs to transmit reference signals for beam scanning corresponding to all resource configurations regardless of whether the terminal apparatus 200 monitors or not. Therefore, the frequency and time resources of the downlink occupied by the reference signal are large, and the throughput of user data in the downlink may be reduced.

The base station apparatus 100 notifies the above-described similarity information, and the terminal apparatus 200 selects the monitored resource based on the similarity information. Therefore, the base station apparatus 100 cannot know the resources monitored by the terminal apparatus 200 and transmits the reference signal using all the resources.

In addition, the terminal apparatus 200 selects the monitored resource on the assumption that the base station apparatus 100 performs beam scanning corresponding to all the resource configurations.

Therefore, the base station apparatus 100 is required to perform beam scanning transmission corresponding to all the resource configurations. Therefore, the following description is made on a configuration in which the base station apparatus 100 can omit beam scanning transmission corresponding to at least a part of the resource allocation.

Fig. 20 is a diagram for explaining the types of resources included in the resource configuration. The resource configuration contains resources specifying one type among periodic (static), aperiodic (dynamic) and semi-permanent (quasi-static) as defined in, for example, 3GPP standard specification TS 38.311.

Periodic tends to mean that the reference signal is periodically provided from the base station apparatus 100. Semi-permanent means that the reference signal is provided periodically when designated with MAC signaling. Aperiodic is provided dynamically with DCI (Downlink Control Signal ).

In the technique of the present disclosure, in order to reduce the reference signal transmitted by the base station apparatus 100, the method of specifying the resource type is changed.

As described above, in the case of the semi-permanent Reference Signal (RS), the terminal apparatus 200 can grasp whether to provide the reference signal with the resources included in the resource configuration. Accordingly, in the case where the reference signal is provided by the resource included in the unused resource configuration, the terminal apparatus 200 monitors the resource of the other resource configuration whose similarity is represented by the similarity information. In addition, the resources of other resource configurations monitored by the terminal apparatus 200 provide reference signals. In addition, the resource is an active semi-permanent resource.

In the conventional reporting configuration, in the case where the resource type is semi-permanent, the terminal apparatus 200 can report the activated resource, but cannot report the unactivated (deactivated) resource.

However, as described above, the base station apparatus 100 provides the similarity information of the resource configuration, so that the terminal apparatus 200 can make a report of other resource configurations based on the relationship having the similarity.

Accordingly, the terminal apparatus 200 performs replacement of the predetermined resource configuration reporting the activated resource as the other resource configuration having the similarity relationship. Thus, even if the resources of the predetermined resource configuration are deactivated, the terminal apparatus 200 can report the resource configuration. In addition, regarding the base station apparatus 100, if there is a relationship of similarity, it is sufficient to activate at least one resource among the plurality of resource configurations notified to the terminal apparatus 200 and transmit a reference signal, and the remaining resources may be deactivated. This can reduce the reference signals transmitted by the base station apparatus 100, and can further improve the throughput of user data in the downlink.

In addition, since the resources of the resource allocation having the similarity relationship are of substantially the same type, the type of the resource included in the similarity information designated to reduce the reference signals transmitted from the base station apparatus 100 is semi-permanent. Here, however, the resources of the resource configuration having the relationship of similarity may be set to different types. That is, the base station apparatus 100 can notify the terminal apparatus 200 of the similarity information including the resource configuration including the semi-permanent resource and the resource configuration including the periodic resource.

Table 1 is a table showing the resource types of the reference target resource configuration. As shown in table 1, when the resource of the resource configuration is deactivated, the terminal apparatus 200 refers to the activated semi-permanent resource among the resources of the resource configuration included in the similarity information as the resource of the substitution target. Alternatively, the terminal apparatus 200 may refer to periodic resources. The terminal apparatus 200 monitors the resource of the resource allocation of the reference target as a substitute for the deactivated resource.

(Table 1) resource types of reference target resources

	Resource type of reference target resource
		1	Semi-permanent opening (activation)
2	Periodicity of

In addition, as shown in table 1, the terminal apparatus 200 does not refer to aperiodic resources as a substitute target. This is because it is preferable to provide beam scanning with periodic or semi-permanent reference signals. In beam scanning, a reference signal is transmitted with a plurality of resources having periodicity. Therefore, non-periodic resources are not preferred as a surrogate target.

In addition, the terminal apparatus 200 may refer to a semi-permanent resource as a resource configuration of a relationship having similarity as a substitute target of a periodic resource. In this case, the terminal apparatus 200 is set to know that the semi-permanent resource is activated. However, the periodic resources are often resources for periodically transmitting the reference signal, and thus the improvement effect of the resource overhead of the downlink becomes small.

An example of beam scanning processing according to the embodiment of the present disclosure will be described with reference to fig. 21. Fig. 21 is a timing chart showing an example of the flow of the beam scanning process of the embodiment of the present disclosure.

As shown in fig. 21, the base station apparatus 100 notifies the terminal apparatus 200 of the report setting (report configuration) (1) (step S301). The base station apparatus 100 notifies the terminal apparatus 200 of the quasi-static resource setting (1) (resource configuration (1)) included in the report setting (1) (step S302). Quasi-static resource setting means that the resource type of the resource comprised by the resource setting is a semi-permanent resource setting.

The base station apparatus 100 notifies the terminal apparatus 200 of the report setting (report configuration) (2) (step S303). The base station apparatus 100 notifies the terminal apparatus 200 of the quasi-static resource setting (2) (resource configuration (2)) included in the report setting (2) (step S304).

The base station apparatus 100 notifies the terminal apparatus 200 of the report setting (report configuration) (3) (step S305). The base station apparatus 100 notifies the terminal apparatus 200 of the quasi-static resource setting (3) (resource allocation (3)) included in the report setting (3) (step S306).

The base station apparatus 100 notifies the terminal apparatus 200 of the similarity information (QCL for reporting configuration) of the plurality of reporting settings (step S307).

The base station apparatus 100 activates (activates) the resource setting (1), and deactivates (deactivates) the resource settings (2) and (3) (step S308).

Next, the base station apparatus 100 performs beam scanning transmission of Reference Signals (RSs) for a resource set group (a plurality of resource configurations) (step S309). For example, the base station apparatus 100 performs beam scanning transmission of the activated resource setting (1).

The terminal apparatus 200 performs measurement of an activated resource setting among 3 resource settings (resource configurations (1) to (3)) (step S310). Here, measurement of beam scanning of the resource configuration (1) is performed.

The terminal apparatus 200 reports the beam measurement result of the resource configuration (1) (hereinafter, also referred to as beam reporting (1)) using the uplink resource indicated by the report setting (1) (step S311).

The terminal apparatus 200 performs beam announcement (1) with the uplink resource indicated by the report setting (2) (step S312), and performs beam announcement (1) with the uplink resource indicated by the report setting (3) (step S313).

<5. Modification >

The terminal device or the base station device according to the present embodiment may be implemented by a dedicated computer system or a general-purpose computer system.

For example, a communication program for performing the above-described actions is distributed in a computer-readable storage medium such as an optical disk, a semiconductor memory, a magnetic tape, a floppy disk, or the like. Then, for example, the program is installed in a computer, and the control device is configured by executing the above-described processing. At this time, the control device may be the terminal device 200, the base station device 100, or other external devices (e.g., a personal computer). The control device may be a device (e.g., a control unit) inside the terminal device 200 or the base station device 100.

The communication program may be stored in a disk device provided in a server device on a network such as the internet, and may be downloaded to a computer or the like. The above-described functions may be realized by cooperation of an OS (Operating System) and application software. In this case, the part other than the OS may be distributed by being stored in a medium, or the part other than the OS may be stored in a server device and downloaded to a computer or the like.

In the above-described embodiments, all or a part of the processing described as the processing performed automatically may be performed manually, or all or a part of the processing described as the processing performed manually may be performed automatically by a known method. The processing order, specific names, and information including various data and parameters shown in the above description and the drawings may be arbitrarily changed unless otherwise specifically described. For example, the various information shown in the figures is not limited to the illustrated information.

The components of each illustrated apparatus are functionally conceptual, and are not necessarily physically configured as illustrated. That is, the specific manner of dispersing and integrating the respective devices is not limited to the illustrated manner, and all or a part thereof may be configured to be dispersed and integrated in any unit functionally or physically according to various loads, use conditions, and the like.

The above embodiments can be appropriately combined in a field where the processing contents are not contradictory.

<6. Summary >

The preferred embodiments of the present disclosure have been described in detail above with reference to the drawings, but the technical scope of the present disclosure is not limited to such examples. It is obvious that various changes or modifications can be conceived by those having ordinary skill in the art having the present disclosure within the scope of the technical idea described in the claims, and it is understood that these changes are of course also within the technical scope of the present disclosure.

The effects described in the present specification are merely illustrative and not restrictive. That is, with respect to the technology of the present disclosure, other effects obvious to those skilled in the art can be obtained from the description of the present invention in addition to or instead of the above effects.

The following structures are also within the technical scope of the present disclosure.

(1) A base station apparatus, wherein,

notifying the terminal device of a plurality of resource cluster information corresponding to a plurality of different frequency bands, the resource cluster information being related to a resource cluster set corresponding to the frequency band,

the resource cluster information includes a plurality of resource set-related information including information related to a plurality of resources to be measured of a plurality of beams having different directivities,

and notifying the terminal device of association information for associating the plurality of resource cluster information.

(2) The base station apparatus according to (1), wherein,

and notifying the terminal device of setting information including the plurality of resource cluster information and the association information.

(3) The base station apparatus according to (2), wherein,

a notification of a result of a measurement made based on at least one of the resource clusters among the plurality of resource cluster information is received from the terminal device.

(4) The base station apparatus according to (2), wherein,

and receiving, from the terminal device, a report of a result of measurement performed by selecting a part of the resources included in each of the plurality of resource clusters.

(5) The base station apparatus according to (2), wherein,

and receiving, from the terminal device, a notification of a result of measurement performed on at least one of the plurality of resource clusters within a predetermined period.

(6) The base station apparatus according to (2), wherein,

a notification of a result of the measurement completed at a timing nearest to a timing of notification among measurement results for the plurality of resource groups is received from the terminal device.

(7) The base station apparatus according to (1), wherein,

notifying the terminal device of a plurality of setting information related to a measurement report corresponding to the plurality of resource cluster information,

the association information includes information associating the plurality of setting information.

(8) The base station apparatus according to (7), wherein,

and receiving, from the terminal device, a notification of a result of the measurement made on the resource included in at least one of the plurality of resource clusters as a result of the measurement for the other resource clusters.

(9) The base station apparatus according to any one of (1) to (8), wherein,

the 1 st resource included in the 1 st resource cluster among the plurality of resource clusters is a resource to which a signal is quasi-statically allocated by the base station apparatus, and when the signal for measurement is not allocated to the 1 st resource, a notification of a result of the measurement for other resources included in the other resource clusters than the 1 st resource cluster and to which the signal for the measurement is allocated is received from the terminal apparatus.

(10) The base station apparatus according to any one of (1) to (9), wherein,

the plurality of frequency bands are respectively different BWP (Band Width Part) or respectively different component carriers.

(11) A terminal device, wherein,

receiving, from a base station apparatus, a plurality of resource cluster information corresponding to a plurality of different frequency bands, the resource cluster information being related to a resource cluster set in correspondence with the frequency band,

and receiving association information for associating the plurality of resource cluster information from the base station apparatus.

(12) The terminal device according to (11), wherein,

and reporting a result of measurement performed based on at least one of the plurality of resource clusters to the base station apparatus.

(13) The terminal device according to (11), wherein,

and reporting a result of measurement performed by selecting a part of the resources included in each of the plurality of resource clusters to the base station apparatus.

(14) The terminal device according to (11), wherein,

and reporting a result of measurement performed on at least one of the plurality of resource clusters within a predetermined period to the base station apparatus.

(15) The terminal device according to (11), wherein,

and reporting, to the base station apparatus, a result of the measurement completed at a timing nearest to a reported timing among results of the measurement for the plurality of resource groups.

(16) The terminal device according to any one of (11) to (15), wherein,

the 1 st resource included in the 1 st resource cluster among the plurality of resource clusters is a resource to which a signal is quasi-statically allocated by the base station apparatus, and when the signal for measurement is not allocated to the 1 st resource, the base station apparatus is notified of a result of the measurement for other resources included in the other resource clusters than the 1 st resource cluster and to which the signal for the measurement is allocated.

(17) A communication system includes a base station device and a terminal device,

the base station device

Notifying a plurality of resource cluster information corresponding to a plurality of different frequency bands, the resource cluster information being related to a resource cluster set in correspondence with the frequency band,

notifying association information associating the plurality of resource cluster information,

the terminal device reports the measurement results for a plurality of resource clusters to the base station device based on the plurality of resource cluster information and the association information.

(18) A method of communication, wherein,

(19) A method of communication, wherein,

the resource cluster information includes a plurality of resource set-related information including information related to a plurality of resources that are measurement targets of a plurality of beams having different directivities,

Claims

1. A base station apparatus, wherein,

2. The base station apparatus of claim 1, wherein,

3. The base station apparatus according to claim 2, wherein,

4. The base station apparatus according to claim 2, wherein,

5. The base station apparatus according to claim 2, wherein,

6. The base station apparatus according to claim 2, wherein,

7. The base station apparatus of claim 1, wherein,

8. The base station apparatus of claim 7, wherein,

9. The base station apparatus of claim 1, wherein,

10. The base station apparatus of claim 1, wherein,

the plurality of frequency bands are respectively different bandwidth portions BWP or respectively different component carriers.

11. A terminal device, wherein,

12. The terminal device of claim 11, wherein,

13. The terminal device of claim 11, wherein,

14. The terminal device of claim 11, wherein,

15. The terminal device of claim 11, wherein,

16. The terminal device of claim 11, wherein,

the 1 st resource included in the 1 st resource cluster among the plurality of resource clusters is a resource to which a signal is quasi-statically allocated by the base station apparatus, and when the signal for measurement is not allocated to the 1 st resource, the base station apparatus is notified of a result of the measurement for other resources included in other resource clusters than the 1 st resource cluster and to which the signal for the measurement is allocated.

17. A communication system includes a base station device and a terminal device,

the base station device

18. A method of communication, wherein,

19. A method of communication, wherein,