terminal

Abstract

The terminal (200) comprises: a receiving unit (203) which receives a reference signal within a specified measurement period; a control unit (213) which obtains average or statistical information of the reception quality in layer 1 of the reference signal measured within the measurement period; and a sending unit (201) which sends the average or statistical information to a communication node (100a or 100b).

Description

Technical Field

[0001] The present invention relates to a terminal that performs wireless communication, and more particularly to a terminal that transmits reception quality of a reference signal. Background Art

[0002] In the 3rd Generation Partnership Project (3GPP), Long Term Evolution (LTE) was standardized, and LTE-Advanced (hereinafter referred to as LTE including LTE-Advanced) was standardized for the purpose of further speeding up LTE. In addition, in 3GPP, the specifications of the successor systems of LTE, such as 5G or New Radio (NR), are further studied.

[0003] When receiving a reference signal for measurement (for example, a channel state information reference signal (CSI-RS)), the terminal measures reception quality such as received power (RSRP) of the reference signal.

[0004] 3GPP stipulates that reception quality such as received power of a reference signal processed in layer 3 of a terminal (hereinafter referred to as L3RSRP) is recorded as tracking information for use in quality analysis of a network (see Non-Patent Document 1).

[0005] For example, a communication node (for example, a wireless base station) transmits L3 RSRP reported from a terminal to a trace collection entity (hereinafter referred to as TCE), so that the TCE can acquire trace information.

[0006] Prior art literature

[0007] Non-patent literature

[0008] Non-patent document 1: 3GPP TS 32.422 V15.2.0 3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; Telecommunication management; Subscriber and equipment trace; Trace control and configuration management (Release 15), 3GPP, June 2019 Summary of the invention

[0009] In the terminal, the reference signal received power (RSRP) is processed in layer 1 in addition to layer 3.

[0010] The reporting period of the reference signal received power processed in layer 1 in the terminal (hereinafter referred to as L1 RSRP) is shorter than the reporting period of L3 RSRP.

[0011] Therefore, in order to obtain highly accurate tracking information, it is considered that the communication node sends the L1 RSRP reported from the terminal to the TCE.

[0012] However, since L1 RSRP is reported from the terminal at a high frequency, if the communication node directly transmits the reported L1-RSRP to the TCE, the processing load of the network may increase, which is not preferable.

[0013] Therefore, the present invention has been made in view of such a situation, and an object of the present invention is to provide a terminal that can provide highly accurate tracking information while avoiding an increase in the processing load of a network.

[0014] A terminal (200) of one embodiment of the present invention comprises: a receiving unit (203) which receives a reference signal within a specified measurement period; a control unit (213) which obtains an average or statistical information of the reception quality in layer 1 of the reference signal measured within the measurement period; and a sending unit (201) which sends the average or the statistical information to a communication node (100a or 100b). BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a diagram schematically showing the overall structure of the wireless communication system 10 .

[0016] Figure 2 It is a functional block diagram of the terminal 200.

[0017] Figure 3 1 is a functional block diagram of the communication nodes 100a and 100b.

[0018] Figure 4 This is a diagram for explaining an example of beam scanning using a wide beam in beam steering.

[0019] Figure 5 This is a diagram for explaining an example of beam scanning using a narrow beam in beam steering.

[0020] Figure 6 This is a diagram for explaining an example of beam scanning using a narrow beam in beam steering.

[0021] Figure 7 This is a diagram showing a transmission sequence (operation example 1) in providing tracking information.

[0022] Figure 8 This is a diagram for explaining an example of averaging the reception quality in layer 1 of the reference signal in operation example 1.

[0023] Fig. 9 This is a diagram for explaining an example of averaging the reception quality in layer 1 of the reference signal in operation example 1.

[0024] Fig.10 This is a diagram showing a transmission sequence (operation example 2) in providing tracking information.

[0025] Fig.11 This is a diagram for explaining an example of averaging the reception quality in layer 1 of the reference signal in operation example 2.

[0026] Fig.12 This is a diagram showing a transmission sequence (operation example 3) in providing tracking information.

[0027] Fig.13 1 is a diagram showing an example of the hardware configuration of the communication nodes 100 a and 100 b and the terminal 200 . DETAILED DESCRIPTION

[0028] Hereinafter, the embodiments will be described based on the drawings. In addition, the same or similar reference numerals are given to the same functions or structures, and the description thereof will be appropriately omitted.

[0029] (1) Overall schematic structure of wireless communication system

[0030] Figure 1 1 is a diagram schematically showing the overall configuration of a wireless communication system 10 according to the present embodiment. The wireless communication system 10 is a wireless communication system in accordance with 5G (NR).

[0031] like Figure 1 As shown, the wireless communication system 10 includes a core network (5G-CN) 20, communication nodes 100a, 100b, a terminal 200, and a tracking collection entity (TCE) 300. The terminal is also called a user equipment (UE). The TCE is also called a data server. In addition, the specific structure of the wireless communication system 10 including the number of communication nodes and terminals is not limited to Figure 1 Example shown.

[0032] The communication nodes 100a and 100b are gNB or ng-eNB, respectively, and are included in the next generation radio access network (NG-RAN, not shown). The NG-RAN is connected to the 5G-CN 20 according to NR. In addition, the NG-RAN and the 5G-CN 20 can also be simply expressed as "network".

[0033] The communication nodes 100 a , 100 b perform wireless communication in accordance with NR between the communication nodes 100 a , 100 b and the terminal 200 .

[0034] At least one of the communication nodes 100a and 100b manages the control plane connected to the 5G-CN 20. The protocol stack for the control plane includes a physical (PHY) layer, a media access control (MAC) layer, a radio link control (RLC) layer, a packet data convergence control protocol (PDCP) layer, a radio resource control (RRC) layer, and a non-access (NAS) layer.

[0035] The communication nodes 100a and 100b manage the user plane connected to the 5G-CN 20. The protocol stack for the user plane includes a PHY layer, a MAC layer, an RLC layer, a PDCP layer, and a Service Data Adaptation Protocol (SDAP) layer.

[0036] The protocol stack for the control plane and the protocol stack for the user plane are respectively classified into layers 1 to 3 of the Open System Interconnection (OSI) reference model. Layer 1 includes the PHY layer. Layer 2 includes the MAC layer, the RLC layer, the PDCP layer, and the SDAP layer. Layer 3 includes the RRC layer and the NAS layer.

[0037] Furthermore, the communication nodes 100a and 100b form cells C1 and C2, respectively. The cell C2 is within the coverage of the cell C1. Alternatively, the cell C1 may be within the coverage of the cell C2. In this embodiment, the communication node 100b includes a plurality of antenna elements.

[0038] The communication nodes 100a, 100b and the terminal 200 can support massive MIMO that generates a more directional beam by controlling the wireless signals sent from multiple antenna elements, carrier aggregation (CA) that bundles multiple component carriers (CCs), and dual connectivity (DC) that simultaneously communicates between the terminal and two NG-RAN nodes. In addition, CC is also called a carrier.

[0039] In this embodiment, as described later, the terminal 200 obtains the average or statistical information of the reception quality in layer 1 of the reference signal measured within a predetermined measurement period. The terminal 200 sends the obtained average or statistical information to the communication node 100a or the communication node 100b. As reference signals, channel state information reference signal (CSI-RS), synchronization signal broadcast channel block (SSB), modulation reference signal (DM-RS), sounding reference signal (SRS), etc. can be cited.

[0040] The “reception quality of the reference signal in layer 1” is also referred to as the “reception quality of the reference signal without processing in layer 3”. Furthermore, the “average of the reception quality of the reference signal in layer 1” is also referred to as the “smoothing of the reception quality of the reference signal in layer 1”.

[0041] In addition, instead of the terminal 200, the communication node 100a or the communication node 100b may receive the reception quality of the reference signal in layer 1 from the terminal 200, and obtain average or statistical information of the reception quality of the reference signal in layer 1 received in a predetermined reporting period.

[0042] TCE 300 is connected to communication node 100a and communication node 100b via 5G-CN 20. TCE 300 stores average or statistical information of reception quality in layer 1 of a reference signal sent from communication node 100a or communication node 100b as tracking information. TCE 300 may also store resource information of a reference signal sent from communication node 100a or communication node 100b as tracking information.

[0043] In addition, the wireless communication system 10 may include an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) instead of the NG-RAN. In this case, the communication nodes 100a and 100b are eNBs or en-gNBs, respectively, included in the E-UTRAN. The E-UTRAN is connected to the core network (EPC) according to LTE. In this case, the E-UTRAN and the EPC may also be simply referred to as "networks".

[0044] (2) Functional block structure of wireless communication system

[0045] Next, the functional block structure of the wireless communication system 10 is described. Specifically, the functional block structure of the communication nodes 100a, 100b and the terminal 200 is described. Hereinafter, only the parts related to the features in this embodiment are described. Therefore, the communication nodes 100a, 100b and the terminal 200 naturally have other functional blocks that are not directly related to the features in this embodiment.

[0046] For convenience, a functional block diagram of the terminal 200 is first described. Figure 2 2 is a functional block diagram of the terminal 200. Figure 2 As shown, the terminal 200 includes a transmitting unit 201 , a receiving unit 203 , a reception quality measuring unit 205 , a layer 1 processing unit 207 , a layer 3 processing unit 209 , a holding unit 211 , and a control unit 213 .

[0047] The transmitting unit 201 transmits an uplink signal (UL signal) in accordance with NR. The receiving unit 203 receives a downlink signal (DL signal) in accordance with NR. Specifically, the transmitting unit 201 and the receiving unit 203 perform wireless communication between the communication nodes 100a, 100b and the terminal 200 via the physical uplink control channel (PUCCH), the physical uplink shared channel (PUSCH), the physical downlink control channel (PDCCH), the physical downlink shared channel (PDSCH), the physical random access channel (PRACH), etc.

[0048] The transmission unit 201 transmits the reception quality of the reference signal in layer 1 to the communication node 100a or 100b using the layer 1 signal. The transmission unit 201 transmits the reception quality of the reference signal in layer 3 to the communication node 100a or 100b using the layer 3 signal.

[0049] The transmission unit 201 transmits average or statistical information of reception quality in layer 1 of the reference signal to the communication node 100 a or the communication node 100 b using the layer 1 signal.

[0050] The receiving unit 203 receives the SSB in a predetermined measurement period. The receiving unit 203 receives the reference signal in a predetermined measurement period.

[0051] The reception quality measurement unit 205 measures the reception quality of the SSB. The reception quality measurement unit 205 measures the reception quality of the reference signal. The reception quality measurement unit 205 measures the reference signal received power (RSRP), the reference signal received quality (RSRQ), the signal-to-noise ratio (SINR), etc. as reception quality. In addition, the reception quality of the measurement object is notified by the network through an RRC message.

[0052] The layer 1 processing unit 207 processes the reception quality of the reference signal measured by the reception quality measurement unit 205 in layer 1, and acquires the reception quality of the reference signal in layer 1.

[0053] The layer 3 processing unit 209 processes the reception quality of the SSB measured in the reception quality measurement unit 205 in layer 3, and obtains the reception quality of the SSB in layer 3. The layer 3 processing unit 209 processes the reception quality of the reference signal measured in the reception quality measurement unit 205 in layer 3, and obtains the reception quality of the reference signal in layer 3.

[0054] The storage unit 211 stores the reception quality in layer 1 of the reference signal acquired in the layer 1 processing unit 207 .

[0055] The control unit 213 controls each functional block constituting the terminal 200 .

[0056] The control unit 213 obtains the average or statistical information of the reception quality in layer 1 of the reference signal measured in the specified measurement period using the reception quality stored in the storage unit 211. The control unit 213 obtains either the average or statistical information of the reception quality in layer 1 of the reference signal according to an instruction from the network.

[0057] As described later, for example, arithmetic mean, geometric mean, weighted mean, etc. can be cited as the average of the reception quality in layer 1 of the reference signal. As described later, for example, statistics including a combination of mean, variance, and standard deviation can be cited as statistical information on the reception quality in layer 1 of the reference signal.

[0058] When obtaining a weighted average of the reception quality in layer 1 of the reference signal, the control unit 213 sets a weighting coefficient so that the weighting coefficient applied to the reception quality measured at a timing close to the transmission timing of the weighted average is greater than the weighting coefficient applied to the reception quality measured at a timing far from the transmission timing.

[0059] When the receiving unit 203 repeatedly receives a plurality of different reference signals within a predetermined measurement period, the control unit 213 acquires the average or the statistical information of the reception quality in layer 1 of the reference signal for each reference signal.

[0060] In this case, the control unit 213 may determine the average or statistical information indicating the best quality among the averages or statistical information of the plurality of reference signals. The control unit 213 instructs the transmission unit 201 to transmit the determined average or statistical information to the communication node 100a or the communication node 100b.

[0061] Figure 3 FIG. 1 is a functional block diagram of the communication nodes 100a and 100b. Figure 3 As shown, the communication nodes 100a and 100b respectively include a transmission unit 101, a reception unit 103, a beam control unit 105, a processing unit 107, a storage unit 109, and a control unit 111.

[0062] The transmission unit 101 transmits the SSB and the reference signal to the terminal 200. In the present embodiment, the communication node 100b performs the transmission.

[0063] The transmission unit 101 transmits the average or statistical information of the reception quality in layer 1 of the reference signal as tracking information of the terminal 200 to the TCE 300 at a predetermined timing.

[0064] The receiving unit 103 receives the reception quality of the reference signal in layer 1 from the terminal 200. The receiving unit 103 receives the average or statistical information of the reception quality of the reference signal in layer 1 from the terminal 200. The receiving unit 103 receives the reception quality of the reference signal in layer 3 from the terminal 200.

[0065] When receiving the reception quality of the CSI-RS in layer 1 from the terminal 200 as the reception quality of the reference signal in layer 1, the reception unit 103 may further receive resource information of the CSI-RS from the terminal 200 .

[0066] The beam control unit 105 performs beam forming in beam control. When beam forming is applied to beam control, the beam control unit 105 transmits a plurality of SSBs using different wide beams and transmits a plurality of reference signals using different narrow beams. In this embodiment, the communication node 100b performs beam control.

[0067] When the receiving unit 103 receives the reception quality of the SSB in layer 3 during beam control, the processing unit 107 determines the SSB with the highest reception quality in layer 3 within a prescribed reporting period, and identifies the wide beam used to transmit the SSB.

[0068] When receiving unit 103 receives the reception quality of layer 1 of the reference signal during beam control, processing unit 107 specifies the reference signal with the highest reception quality in layer 1 within a predetermined reporting period and identifies the narrow beam used to transmit the reference signal.

[0069] The storage unit 109 stores the reception quality in layer 1 of the reference signal received from the terminal 200. When receiving the reception quality in layer 1 of the CSI-RS from the terminal 200 as the reception quality in layer 1 of the reference signal, the storage unit 109 may further store the resource information of the CSI-RS.

[0070] The control unit 111 controls each functional block constituting the communication nodes 100 a and 100 b .

[0071] The control unit 111 obtains the average or statistical information of the reception quality in layer 1 of the reference signal reported in the specified reporting period using the reception quality stored in the storage unit 109. The control unit 111 obtains either the average or statistical information of the reception quality in layer 1 of the reference signal according to an instruction from the network.

[0072] As described above, the average of the reception quality of the reference signal in layer 1 may be, for example, an arithmetic mean, a geometric mean, a weighted mean, etc. For example, a statistic including a combination of an average, a variance, and a standard deviation may be cited as statistical information on the reception quality of the reference signal in layer 1.

[0073] When receiving the reception quality of layer 1 of the CSI-RS and the resource information of the CSI-RS from the terminal 200, the control unit 111 may instruct the transmission unit 201 to transmit the resource information of the CSI-RS to the TCE 300 at a predetermined timing as the tracking information of the terminal 200. In addition, in this case, the control unit 111 may instruct the transmission unit 201 to transmit the information of the narrow beam used to transmit the CSI-RS to the TCE 300 instead of the resource information of the CSI-RS.

[0074] (3) Operation of wireless communication system

[0075] Next, the operation of the wireless communication system 10 will be described. Specifically, after describing the beam control by the communication node, the provision of tracking information in the beam control will be described. In addition, the provision of tracking information is not limited to beam control, and for example, the provision of tracking information may also be performed in the event of a link failure.

[0076] In addition, in this embodiment, the communication node 100a, the communication node 100b, or the terminal 200 obtains the average or statistical information of the reception quality in layer 1 of the CSI-RS, but is not limited to this. For example, the communication node 100a, the communication node 100b, or the terminal 200 may also obtain the average or statistical information of the reception quality in layer 1 of the DM-RS, SRS, etc.

[0077] (3.1) Beam steering

[0078] In this embodiment, the communication node 100b includes multiple antenna elements and can use multiple beams to apply beamforming to ensure the coverage of the cell C2. The communication node 100b establishes a beam pair between the communication node 100b and the terminal 200 and performs beam control to transmit and receive wireless signals between the communication node 100b and the terminal 200.

[0079] When beamforming is applied in beam steering, the communication node 100b first transmits a plurality of SSBs using different wide beams.

[0080] In addition, there are three types of beamforming: analog beamforming, digital beamforming, and hybrid beamforming. In analog beamforming, one beam is transmitted at a time. In digital beamforming, multiple orthogonalized beams are transmitted at a time. In hybrid beamforming, analog beamforming and digital beamforming are combined to transmit beams.

[0081] Figure 4 FIG. 1 is a diagram for explaining an example of beam scanning using a wide beam in beam control. Figure 4As shown, the communication node 100b applies analog beamforming, sequentially switches wide beams at each time, and transmits different wide beams to areas C21 to C26 in the cell C2. In this embodiment, the terminal 200 resides in the area C22 in the cell C2.

[0082] Specifically, the communication node 100b sequentially switches wide beams 1 to 6 every subframe and repeatedly transmits different wide beams to areas C21 to C26 in the cell C2. The wide beams 1 to 6 are transmitted to areas C21 to C26 in the cell C2, respectively.

[0083] The communication node 100b transmits a plurality of SSBs using wide beams 1 to 6. SSB indices (SSBindex) #1 to #6 are allocated to the plurality of SSBs. The communication node 100b associates each SSB (specifically, SSB index) with the wide beam used to transmit the SSB.

[0084] The number of wide beams is not limited to 6. The time interval for transmitting one beam is not limited to one subframe, and may be, for example, one slot corresponding to the subcarrier interval.

[0085] When receiving the SSB, the terminal 200 measures the reception quality of the SSB and obtains the SSB index (SSBindex) contained in the SSB. For example, RSRP, RSRQ, SINR, etc. can be cited as the reception quality of the SSB. The terminal 200 processes the measured reception quality of the SSB in layer 3 and obtains the reception quality of the SSB in layer 3. As the processing in layer 3, L3 filtering, etc. can be cited.

[0086] The terminal 200 reports the reception quality in layer 3 of the SSB and the SSB index contained in the SSB to the communication node 100b using the layer 3 signal. In addition, in addition to the reception quality in layer 3 of the SSB and the SSB index contained in the SSB, the terminal 200 may also report the cell identifier (Cell ID) in which the terminal 200 resides to the communication node 100b.

[0087] The terminal 200 may also measure the reception quality of the CSI-RS transmitted using a wide beam according to an instruction from the communication node 100b, instead of measuring the reception quality of the SSB. In this case, the terminal 200 processes the measured reception quality of the CSI-RS in layer 3 to obtain the reception quality of the CSI-RS in layer 3. The terminal 200 reports the reception quality of the CSI-RS in layer 3 and the resource information of the CSI-RS to the communication node 100b using a layer 3 signal.

[0088] When the communication node 100b receives the reception quality of the SSB in layer 3 and the SSBindex included in the SSB from the terminal 200, it determines the SSB index assigned to the SSB with the highest reception quality in layer 3 within a specified period. The communication node 100b identifies the wide beam associated with the determined SSB index. Thus, the communication node 100b can grasp the area where the terminal 200 resides.

[0089] In this embodiment, the communication node 100b specifies SSBindex#2 assigned to the SSB with the highest reception quality in layer 3, and identifies wide beam 2 associated with SSB index#2. Thus, the communication node 100b recognizes that the terminal 200 is residing in the area C22.

[0090] In addition, instead of the communication node 100b, the terminal 200 may determine the SSB index allocated to the SSB with the highest reception quality in layer 3 during a fixed period. In this case, the terminal 200 reports the reception quality in layer 3 of the SSB and the SSB index to the communication node 100b.

[0091] Next, the communication node 100b transmits a plurality of CSI-RS using different narrow beams related to the identified wide beam in order to grasp the position of the terminal 200 in the grasped area. In addition, before transmitting the plurality of CSI-RS, the communication node 100b notifies the terminal 200 of the resource information of the CSI-RS used in the transmission of each CSI-RS.

[0092] When the communication node 100b applies analog beamforming and transmits a plurality of CSI-RSs using a narrow beam, the resource information of the CSI-RS includes resource elements (time and frequency) allocated to the transmission of each CSI-RS in a resource block.

[0093] When the communication node 100b applies digital beamforming and uses a narrow beam to send multiple CSI-RSs, the resource information of the CSI-RS includes the resource elements (time and frequency) allocated to the transmission of each CSI-RS in the resource block, and the code used to orthogonalize the multiple narrow beams.

[0094] Figure 5 FIG. 1 is a diagram for explaining an example of beam scanning using a narrow beam in beam control. Figure 5 As shown, the communication node 100b applies analog beamforming, sequentially switches the narrow beams associated with the identified wide beam 2 at each time, and transmits different narrow beams to points C22a to C22d in area C22. In this embodiment, the terminal 200 is located at point C22c in area C22.

[0095] Specifically, the communication node 100b sequentially switches the narrow beams 21 to 24 related to the wide beam 2 every subframe and repeatedly transmits different narrow beams to the points C22a to C22d in the area C22. The narrow beams 21 to 24 are transmitted to the points C22a to C22d in the area C22, respectively.

[0096] The communication node 100b transmits multiple CSI-RSs using narrow beams 21 to 24. CSI-RS resource information #a to d is allocated to the multiple CSI-RSs. The communication node 100b associates each CSI-RS (specifically, CSI-RS resource information) with the narrow beam used to transmit the CSI-RS.

[0097] The number of narrow beams is not limited to 4. The time interval for transmitting one beam is not limited to one subframe, and may be, for example, one slot corresponding to the subcarrier interval.

[0098] Figure 6 FIG. 1 is a diagram for explaining an example of beam scanning using a narrow beam in beam control. Figure 6 As shown, the communication node 100b applies digital beamforming to repeatedly send orthogonalized narrow beams 21 to 24 related to the identified wide beam 2 to locations C22a to C22d in area C22. The communication node 100b uses narrow beams 21 to 24 to send four CSI-RS at a time. The communication node 100b associates each CSI-RS (specifically, the resource information of the CSI-RS) with the narrow beam used to send the CSI-RS.

[0099] When receiving CSI-RS by analog beamforming or digital beamforming, terminal 200 measures the reception quality of CSI-RS. For example, RSRP, RSRQ, SINR, etc. can be cited as the reception quality of CSI-RS. Terminal 200 processes the measured reception quality of CSI-RS in layer 1 and obtains the reception quality of CSI-RS in layer 1.

[0100] The terminal 200 uses the layer 1 signal to report the reception quality of the CSI-RS in layer 1 and the resource information of the CSI-RS to the communication node 100b. In addition, the terminal 200 may also use the layer 1 signal to report the reception quality of the CSI-RS in layer 1 and the resource information of the CSI-RS to the communication node 100a.

[0101] When the communication node 100b receives the reception quality of the CSI-RS in layer 1 and the resource information of the CSI-RS from the terminal 200, it determines the resource information of the CSI-RS with the highest reception quality in layer 1. The communication node 100b identifies the narrow beam associated with the determined CSI-RS resource information. Thus, the communication node 100b can grasp the position of the terminal 200 in the area C22.

[0102] The communication node 100 b uses the identified narrow beam to establish a beam pair between the communication node 100 b and the terminal 200 , and transmits and receives wireless signals between the communication node 100 b and the terminal 200 .

[0103] In this embodiment, the communication node 100b uses the narrow beam 23 transmitted to the point C 22c to establish a beam pair between the communication node 100b and the terminal 200, and transmits and receives wireless signals between the communication node 100b and the terminal 200.

[0104] In addition, the reporting period of the reception quality in layer 1 of the CSI-RS is shorter than the reporting period of the reception quality in layer 3 of the SSB or CSI-RS. Therefore, the reception quality in layer 1 of the CSI-RS is reported by the terminal 200 to the communication node 100b at a higher frequency than the reception quality in layer 3 of the SSB or CSI-RS. As a result, the movement of the terminal 200, the change of instantaneous attenuation, etc. can be tracked using the reception quality in layer 1 of the CSI-RS.

[0105] (3.2)Provision of tracking information

[0106] Next, the provision of tracking information in beam control is described. The communication node 100a, the communication node 100b, or the terminal 200 obtains the average or statistical information of the reception quality in layer 1 of the CSI-RS measured within a specified measurement period in beam control, and sends the average or statistical information as tracking information of the terminal 200 to the TCE 300. The following describes this action in detail as action examples 1 to 3.

[0107] Furthermore, the communication node 100a, the communication node 100b, or the terminal 200 acquires either the average or the statistical information of the reception quality in layer 1 of the CSI-RS according to an instruction from the network.

[0108] In addition to the above-mentioned operations, the communication node 100b may transmit the reception quality in layer 3 of the SSB reported by the terminal 200 as tracking information of the terminal 200 to the TCE 300 at a predetermined timing.

[0109] (3.2.1) Action Example 1

[0110] In this operation example, terminal 200 obtains average or statistical information on the reception quality in layer 1 of the CSI-RS. Figure 7 FIG. 1 is a diagram showing the transmission sequence (action example 1) in the transmission of tracking information. Figure 7 As shown, during beam control, terminal 200 obtains average or statistical information of reception quality in layer 1 of CSI-RS measured in a predetermined measurement period ( S11 ).

[0111] The following example can be given as the average of the reception quality in layer 1 of the CSI-RS.

[0112] Arithmetic mean

[0113] Geometric mean

[0114] Weighted average

[0115] When using the arithmetic mean, when the reception qualities of n CSI-RS in layer 1 are measured within a specified measurement period, the terminal 200 divides the sum of the reception qualities of n CSI-RS in layer 1 by n, thereby obtaining the average of the reception qualities of CSI-RS in layer 1.

[0116] When using the geometric mean, when the reception qualities of n CSI-RS in layer 1 are measured within a specified measurement period, the terminal 200 takes the nth root of the product of the reception qualities of n CSI-RS in layer 1, thereby obtaining the average of the reception qualities in layer 1 of the CSI-RS.

[0117] When using weighted averaging, when the reception qualities of n CSI-RS in layer 1 are measured within a specified measurement period, the terminal 200 multiplies the reception qualities of n CSI-RS in layer 1 by weighting coefficients respectively and adds them up, thereby obtaining the average of the reception qualities of CSI-RS in layer 1.

[0118] In this case, for example, the weighting coefficient of the reception quality in layer 1 of the CSI-RS measured at a timing close to the average transmission timing in the communication node 100a or the communication node 100b is made greater than the weighting coefficient of the reception quality in layer 1 of the CSI-RS measured at a timing far from the transmission timing.

[0119] For example, a statistic including a combination of an average, a variance, and a standard deviation can be cited as the statistical information of the reception quality in layer 1 of the CSI-RS.

[0120] When the terminal 200 obtains the average or statistical information of the reception quality in layer 1 of the CSI-RS, it sends the average or statistical information to the communication node 100a or the communication node 100b at a predetermined timing (S13). For example, the terminal 200 sends the average or statistical information to the communication node 100a or the communication node 100b using a layer 1 signal via the PUCCH or PUSCH.

[0121] In addition, the communication node 100a or the communication node 100b notifies the terminal 200 in advance of the timing and channel for sending the average or statistical information using an RRC message (e.g., RRC configuration). The average or statistical information is sent through a message different from the reception quality in layer 1 of the CSI-RS reported to the communication node 100a or the communication node 100b.

[0122] When the communication node 100a or the communication node 100b receives the average or statistical information from the terminal 200, it sends the average or statistical information to the TCE 300 at a predetermined timing (S15). When the TCE 300 receives the average or statistical information from the communication node 100a or the communication node 100b, it stores the average or statistical information as the tracking information of the terminal 200 (S17).

[0123] Figure 8 1 is a diagram for explaining an example of averaging the reception quality of the reference signal in layer 1 in operation example 1. Figure 8 In the example shown, the terminal 200 measures the L1 RSRP of the CSI-RS as the reception quality in layer 1 of the CSI-RS. Figure 8 As shown, terminal 200 averages the L1 RSRPs of four CSI-RSs measured in a predetermined measurement period.

[0124] The terminal 200 transmits the averaged L1 RSRP to the communication node 100a or the communication node 100b at a predetermined timing. Upon receiving the averaged L1 RSRP, the communication node 100a or the communication node 100b transmits the averaged L1 RSRP to the TCE 300 at a predetermined timing.

[0125] Fig. 9 1 is a diagram for explaining an example of averaging the reception quality of the reference signal in layer 1 in operation example 1. Fig. 9 In the illustrated example, the terminal 200 measures the L1 RSRP of the CSI-RS as the reception quality of the CSI-RS in layer 1. Specifically, the terminal 200 measures the L1 RSRP of a plurality of CSI-RSs transmitted using narrow beams 21 to 24 by applying pseudo beamforming.

[0126] like Fig. 9 As shown, the terminal 200 obtains the average L1RSRP of the CSI-RS measured in the measurement period T for each CSI-RS. Specifically, the layer 1 processing unit 207 (see Figure 2 )According to each CSI-RS resource, obtain the average L1 RSRP of the CSI-RS measured within the measurement period T.

[0127] in addition, Fig. 9 FIG. 1 shows a case where the layer 1 processing unit 207 acquires the average of the L1 RSRPs of the CSI-RSs measured in the measurement period T in the CSI-RS resource information #a.

[0128] The terminal 200 determines an average having the highest value among the obtained averages of L1 RSRP of the plurality of CSI-RSs, and transmits the determined average to the communication node 100a or the communication node 100b at a predetermined timing.

[0129] (3.2.2) Action Example 2

[0130] In this operation example, the communication node 100a or the communication node 100b obtains average or statistical information of the reception quality in layer 1 of the CSI-RS. Fig.10 FIG. 2 is a diagram showing the transmission sequence (action example 2) in providing tracking information. Fig.10 As shown, the terminal 200 reports the reception quality of the CSI-RS in layer 1 and the resource information of the CSI-RS to the communication node 100a or the communication node 100b using the layer 1 signal during beam control (S31).

[0131] The communication node 100a or the communication node 100b obtains average or statistical information of the reception quality in layer 1 of the CSI-RS reported in a predetermined reporting period (S33).

[0132] The above-mentioned arithmetic mean, geometric mean, weighted mean, etc. can be cited as the average of the reception quality in CSI-RS layer 1. In addition, statistics including a combination of the above-mentioned average, variance, and standard deviation can be cited as statistical information on the reception quality in CSI-RS layer 1.

[0133] When the communication node 100a or the communication node 100b obtains the average or statistical information of the reception quality in layer 1 of the CSI-RS, it sends the average or statistical information to the TCE 300 at a predetermined timing (S35). When the TCE 300 receives the average or statistical information from the communication node 100a or the communication node 100b, it stores the average or statistical information as tracking information of the terminal 200 (S37).

[0134] In addition, in S33, the communication node 100a or the communication node 100b may thin out the reception quality in layer 1 of the CSI-RS reported by the terminal 200 instead of obtaining the average or statistical information of the reception quality in layer 1 of the CSI-RS.

[0135] In this case, the communication node 100a or the communication node 100b may also transmit the reception quality in layer 1 of the CSI-RS reported by the terminal 200 to the TCE 300 immediately before the transmission timing of the tracking information of the terminal 200 to the TCE 300. In addition, the transmission timing is predetermined between the communication node 100a or the communication node 100b and the TCE 300.

[0136] Fig.11 1 is a diagram for explaining an example of averaging the reception quality of the reference signal in layer 1 in operation example 2. Fig.11 In the example, the terminal 200 reports the L1 RSRP of the CSI-RS to the communication node 100a or the communication node 100b as the reception quality in layer 1 of the CSI-RS. Fig.11 As shown, the communication node 100a or the communication node 100b averages the L1 RSRPs of the four CSI-RSs reported in a predetermined reporting period.

[0137] When receiving the averaged L1 RSRP, the communication node 100a or the communication node 100b transmits the averaged L1 RSRP to the TCE 300 at a predetermined timing.

[0138] In addition, the communication node 100a or the communication node 100b may obtain the average L1 RSRP of the CSI-RS reported in the predetermined reporting period for each CSI-RS. Figure 3 ) According to each resource of the CSI-RS reported by the terminal 200, an average of the L1 RSRPs of the CSI-RS reported within a specified reporting period is obtained.

[0139] In this case, the communication node 100a or the communication node 100b specifies an average having the highest value among the averages of the acquired L1RSRPs of the plurality of CSI-RSs, and transmits the average to the TCE 300 at a predetermined timing.

[0140] (3.2.3) Action Example 3

[0141] In this action example, the communication node 100 a or the communication node 100 b sends the resource information of the CSI-RS to the TCE 300 . Fig.12 FIG. 2 is a diagram showing the transmission sequence (action example 3) in providing tracking information. Fig.12 As shown, the terminal 200 reports the reception quality of the CSI-RS in layer 1 and the resource information of the CSI-RS to the communication node 100a or the communication node 100b using the layer 1 signal during beam control (S51).

[0142] Communication node 100a or communication node 100b transmits CSI-RS resource information reported from terminal 200 to TCE 300 immediately before the timing of transmitting tracking information of terminal 200 to TCE 300 (S53). Note that this transmission timing is predetermined between communication node 100a or communication node 100b and TCE 300.

[0143] When receiving the resource information of the CSI-RS from the communication node 100a or the communication node 100b, the TCE 300 stores the resource information of the CSI-RS as tracking information (S55) of the terminal 200. In this case, the association between the resource information of each CSI-RS and the narrow beam used for transmitting the CSI-RS is shared in advance between the communication node 100a or the communication node 100b and the TCE 300.

[0144] In addition, when the association is not pre-shared between the communication node 100a or the communication node 100b and the TCE 300, in S53, the communication node 100a or the communication node 100b can send the resource information of the CSI-RS and the information of the narrow beam used to send the CSI-RS to the TCE 300.

[0145] Thus, by referring to the resource information of the CSI-RS stored in the TCE 300 and obtaining the narrow beam used to transmit the CSI-RS, the position of the terminal 200 can be roughly estimated. In addition, since the communication node 100a or the communication node 100b does not need to obtain the average or statistical information of the reception quality in the layer 1 of the CSI-RS, the processing load of the communication node 100a or the communication node 100b can be reduced.

[0146] In addition, in S53, the communication node 100a or the communication node 100b may transmit only the information of the narrow beam used to transmit the CSI-RS as the tracking information of the terminal 200 to the TCE 300 instead of the resource information of the CSI-RS.

[0147] (4) Function / Effect

[0148] According to the above-described embodiment, the terminal 200 obtains the average or statistical information of the reception quality in layer 1 of the reference signal measured in a predetermined measurement period, and transmits the obtained average or statistical information to the communication node 100a or 100b.

[0149] With such a configuration, terminal 200 can reduce the number of times the reception quality in layer 1 is transmitted.

[0150] In addition, since the terminal 200 obtains the average or statistical information of the reception quality in layer 1 measured within the specified measurement period, it is possible to send high-precision tracking information to the communication node 100a or 100b compared to the case where the reception quality in layer 1 is intermittently eliminated to reduce the number of times the reception quality in layer 1 is sent.

[0151] Therefore, the terminal 200 can provide highly accurate tracking information while avoiding an increase in the processing load of the network.

[0152] According to the above-described embodiment, the terminal 200 obtains a weighted average of the reception quality in layer 1 and transmits the obtained weighted average to the communication node 100a or 100b. The weighting coefficient applied to the reception quality measured at a timing close to the transmission timing of the weighted average is greater than the weighting coefficient applied to the reception quality measured at a timing far from the transmission timing.

[0153] According to such a configuration, the ratio of the reception quality in layer 1 measured at a timing close to the transmission timing of the weighted average to the reception quality in layer 1 measured at a timing far from the transmission timing of the weighted average increases.

[0154] This makes it possible to reduce the influence of the reception quality in layer 1 measured at a timing far from the transmission timing of the weighted average.

[0155] Therefore, terminal 200 can send more accurate tracking information to the communication node.

[0156] According to the above-mentioned embodiment, the terminal 200 obtains the average or the statistical information for each reference signal.

[0157] According to such a configuration, it is possible to avoid mixing of average or statistical information of reception quality of different reference signals in layer 1. Therefore, terminal 200 can transmit more accurate tracking information to the communication node.

[0158] According to the above-described embodiment, the terminal 200 transmits the average or statistical information indicating the best quality among the average or statistical information of a plurality of reference signals to the communication node 100a or 100b.

[0159] According to such a configuration, it is possible to realize more accurate analysis of the position of the terminal 200 or the quality at the position using the tracking information.

[0160] (5) Other Implementation Methods

[0161] As mentioned above, although the content of this invention was demonstrated based on embodiment, this invention is not limited to these descriptions, and it is obvious to a person skilled in the art that various deformation|transformation and improvement can be made.

[0162] In the above-mentioned embodiment, the terminal 200 is connected to the communication nodes 100a and 100b, but the present invention is not limited thereto. For example, the terminal 200 may be connected to only one communication node that manages the control plane and the user plane connected to the 5G-CN 20 or the EPC.

[0163] The block diagram used in the description of the above-mentioned embodiment ( Figure 2 and Figure 3 ) shows blocks in units of functions. These functional blocks (structural parts) are implemented by any combination of at least one of hardware and software. In addition, there is no particular limitation on the implementation method of each functional block. That is, each functional block can be implemented using a device that is physically or logically combined, or two or more physically or logically separated devices can be directly or indirectly connected (for example, using wires, wirelessly, etc.) and implemented using these multiple devices. The functional block can also be implemented by combining software with the above-mentioned one device or the above-mentioned multiple devices.

[0164] Functionally, it includes judging, deciding, determining, calculating, calculating, processing, deriving, investigating, searching, confirming, receiving, sending, outputting, accessing, solving, selecting, selecting, establishing, comparing, assuming, expecting, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but is not limited to these. For example, the functional block (structural part) that enables the sending function is called a transmitting unit or a transmitter. In short, as mentioned above, there is no particular limitation on the implementation method.

[0165] Furthermore, the terminal 200 described above may also function as a computer that performs processing of the wireless communication method of the present disclosure. Fig.13 FIG. 1 is a diagram showing an example of the hardware structure of the device. Fig.13 As shown, the device may also be configured as a computer device including a processor 1001, a memory 1002 (memory), a storage 1003 (storage), a communication device 1004, an input device 1005, an output device 1006, and a bus 1007.

[0166] In the following description, the word "device" may be replaced by "circuit", "device", "unit", etc. The hardware structure of the device may include one or more of the devices shown in the figure, or may exclude some of the devices.

[0167] Each functional block of the device is implemented by any hardware element or a combination of the hardware elements in the computer device.

[0168] In addition, each function in the device is implemented by the following method: predetermined software (program) is read into hardware such as processor 1001 and memory 1002, so that processor 1001 performs calculations and controls the communication of communication device 1004 or controls at least one of the reading and writing of data in memory 1002 and storage 1003.

[0169] The processor 1001 controls the entire computer by, for example, executing an operating system. The processor 1001 may be constituted by a central processing unit (CPU) including an interface with peripheral devices, a control device, a calculation device, a register, and the like.

[0170] In addition, the processor 1001 reads a program (program code), a software module, data, etc. from at least one of the memory 1003 and the communication device 1004 to the memory 1002, and performs various processes accordingly. As a program, a program that causes a computer to perform at least a part of the actions described in the above-mentioned embodiments is used. In addition, with respect to the above-mentioned various processes, although it is described that the above-mentioned various processes are performed by one processor 1001, the above-mentioned various processes can also be performed simultaneously or sequentially by more than two processors 1001. The processor 1001 can also be installed by more than one chip. In addition, the program can also be sent from the network via a telecommunication line.

[0171] The memory 1002 is a computer-readable recording medium, and may be composed of at least one of a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a random access memory (RAM), etc. The memory 1002 may also be referred to as a register, a cache, a main memory (main storage device), etc. The memory 1002 may store a program (program code), a software module, etc. that can execute a method according to an embodiment of the present disclosure.

[0172] The memory 1003 is a computer-readable recording medium, and may be composed of at least one of an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a floppy disk, a magneto-optical disk (e.g., a compressed disk, a digital versatile disk, a Blu-ray (registered trademark) disk, a smart card, a flash memory (e.g., a card, a stick, a key drive), a Floppy (registered trademark) disk, a magnetic strip, etc. The memory 1003 may also be referred to as an auxiliary storage device. The above-mentioned recording medium may be, for example, other appropriate media such as a database, a server, etc. that includes at least one of the memory 1002 and the memory 1003.

[0173] The communication device 1004 is hardware (transceiver) used to communicate between computers via at least one of a wired network and a wireless network, and may also be called a network device, a network controller, a network card, a communication module, etc.

[0174] The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., for example, in order to realize at least one of frequency division duplex (FDD) and time division duplex (TDD).

[0175] The input device 1005 is an input device that receives input from the outside (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.). The output device 1006 is an output device that implements output to the outside (e.g., a display, a speaker, an LED light, etc.). In addition, the input device 1005 and the output device 1006 may also be integrally formed (e.g., a touch panel).

[0176] In addition, the processor 1001 and the memory 1002 and other devices are connected via a bus 1007 for communicating information. The bus 1007 may be configured using a single bus or different buses for each device.

[0177] In addition, the device may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), etc., and a part or all of each functional block may be implemented by the hardware. For example, the processor 1001 may also be installed using at least one of these hardware.

[0178] In addition, the notification of information is not limited to the form / implementation method described in the present disclosure, and other methods may also be used. For example, the notification of information may be implemented through physical layer signaling (e.g., downlink control information (Downlink Control Information: DCI), uplink control information (Uplink Control Information: UCI), high-level signaling (e.g., RRC (Radio Resource Control: Radio Resource Control) signaling, Medium Access Control (Medium Access Control: MAC) signaling, broadcast information (Master Information Block: MIB, System Information Block: SIB)), other signals or a combination thereof. In addition, RRC signaling may also be referred to as an RRC message, for example, it may also be an RRC connection setup (RRC Connection Setup) message, an RRC connection reconfiguration (RRC Connection Reconfiguration) message, etc.

[0179] Each form / embodiment described in the present disclosure may be applied to at least one of Long Term Evolution (LTE), LTE-Advanced (LTE-A), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), Future Radio Access (FRA), New Radio (NR), W-CDMA (registered trademark), GSM (registered trademark), CDMA 2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-Wide Band (UWB), Bluetooth (registered trademark), a system using other appropriate systems, and a next-generation system extended therefrom. In addition, a combination of a plurality of systems (for example, a combination of at least one of LTE and LTE-A with 5G, etc.) may be applied.

[0180] The processing procedures, timings, processes, etc. of each form / implementation described in this disclosure may be changed in order without contradiction. For example, for the method described in this disclosure, the elements of various steps are presented in an illustrative order, but are not limited to the specific order presented.

[0181] In the present disclosure, specific actions performed by a base station are sometimes performed by its upper node depending on the situation. In a network consisting of one or more network nodes having a base station, various actions performed to communicate with a terminal can be performed by at least one of the base station and other network nodes other than the base station (for example, consider MME or S-GW, etc., but not limited to these). In the above, the case where there is one other network node other than the base station is illustrated, but the other network node may also be a combination of multiple other network nodes (for example, MME and S-GW).

[0182] Information, signals (information, etc.) can be output from a higher layer (or lower layer) to a lower layer (or higher layer), and can also be input or output via multiple network nodes.

[0183] The input or output information can be stored in a specific location (e.g., memory) or managed using a management table. The input or output information can be rewritten, updated, or appended. The output information can also be deleted. The input information can also be sent to other devices.

[0184] The determination may be made by a value represented by one bit (0 or 1), by a Boolean value (Boolean: true or false), or by comparison of numerical values ​​(for example, comparison with a predetermined value).

[0185] Each form / implementation described in the present disclosure may be used alone or in combination, and may be switched according to execution. In addition, notification of scheduled information is not limited to being performed explicitly (e.g., notification of "yes X"), but may also be performed implicitly (e.g., notification of the scheduled information is not performed).

[0186] Software, whether referred to as software, firmware, middleware, microcode, hardware description language, or by other names, shall be interpreted broadly to refer to commands, sets of commands, codes, code segments, program codes, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc.

[0187] In addition, software, commands, information, etc. may be sent and received via a transmission medium. For example, when software is sent from a web page, server, or other remote source using at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and wireless technology (infrared, microwave, etc.), at least one of these wired technology and wireless technology is included in the definition of transmission medium.

[0188] The information, signals, etc. described in the present disclosure may also be represented by any of a variety of different technologies. For example, data, commands, instructions, information, signals, bits, symbols, chips, etc. that may be involved in the above description as a whole may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0189] In addition, the terms described in the present disclosure and the terms required for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may also be a signal (signaling). In addition, a signal may also be a message. In addition, a component carrier (CC) may be referred to as a carrier frequency, a cell, a frequency carrier, etc.

[0190] As used in this disclosure, the terms "system" and "network" may be used interchangeably.

[0191] In addition, the information, parameters, etc. described in the present disclosure may be represented by absolute values, relative values ​​to predetermined values, or other corresponding information. For example, wireless resources may also be indicated by indexes.

[0192] The names used for the above parameters are not limiting in any way. Furthermore, the formulas etc. using these parameters may sometimes differ from those explicitly disclosed in this disclosure. Various channels (e.g., PUCCH, PDCCH, etc.) and information elements may be identified by appropriate names, and therefore the various names assigned to these various channels and information elements are not limiting in any way.

[0193] In the present disclosure, the terms "base station (BS)", "wireless base station", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", "access point", "transmission point", "reception point", "transmission / reception point", "cell", "sector", "cell group", "carrier", "component carrier" and the like are used interchangeably. Sometimes, a base station is also referred to as a macro cell, a small cell, a micro cell, a pico cell, etc.

[0194] A base station can accommodate one or more (for example, 3) cells (also called sectors). When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services through a base station subsystem (for example, a small base station for indoor use (Remote Radio Head: RRH).

[0195] The terms "cell" or "sector" refer to a part or the entirety of a coverage area of ​​at least one of a base station and a base station subsystem that provide communication services within the coverage area.

[0196] In the present disclosure, terms such as “mobile station (MS)”, “user terminal (user terminal)”, “user equipment (UE)”, and “terminal” may be used interchangeably.

[0197] For mobile stations, those skilled in the art sometimes also use the following terms: subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other appropriate terms.

[0198] At least one of the base station and the mobile station may also be referred to as a transmitting device, a receiving device, a communication device, etc. In addition, at least one of the base station and the mobile station may be a device mounted on a mobile body, the mobile body itself, etc. The mobile body may be a means of transportation (e.g., a car, an airplane, etc.), a mobile body that moves in an unmanned manner (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). In addition, at least one of the base station and the mobile station also includes a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

[0199] In addition, the base station in the present disclosure may also be replaced by a mobile station (user terminal, the same below). For example, regarding a structure in which the communication between a base station and a mobile station is replaced by communication between multiple mobile stations (for example, it may also be referred to as D2D (Device-to-Device), V2X (Vehicle-to-Everything, etc.), the various forms / implementations of the present disclosure may also be applied. In this case, it may also be a structure in which the mobile station has the functions of the base station. In addition, terms such as "uplink" and "downlink" may also be replaced by terms corresponding to communication between terminals (for example, "side"). For example, an uplink channel, a downlink channel, etc. may also be replaced by a side channel.

[0200] Likewise, the mobile station in the present disclosure may be replaced by a base station. In this case, the base station may have the same functions as the mobile station.

[0201] A radio frame may be composed of one or more frames in the time domain. In the time domain, one or more frames may be referred to as subframes.

[0202] A subframe may consist of one or more time slots in the time domain. A subframe may be a fixed time length (eg, 1 ms) that is independent of numerology.

[0203] A parameter set may be a communication parameter applied to at least one of the transmission and reception of a certain signal or channel. The parameter set may, for example, represent at least one of a subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, wireless frame structure, specific filtering processing performed by a transceiver in the frequency domain, specific windowing processing performed by a transceiver in the time domain, and the like.

[0204] A slot may be composed of one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.) in the time domain. A slot may be a time unit based on a parameter set.

[0205] A time slot may contain multiple mini-slots. Each mini-slot may be composed of one or more symbols in the time domain. In addition, a mini-slot may also be referred to as a sub-slot. A mini-slot may be composed of fewer symbols than a time slot. A PDSCH (or PUSCH) transmitted in units of time greater than a mini-slot may be referred to as a PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may be referred to as a PDSCH (or PUSCH) mapping type B.

[0206] A radio frame, a subframe, a time slot, a mini-time slot, and a symbol all represent time units for transmitting signals. A radio frame, a subframe, a time slot, a mini-time slot, and a symbol may be referred to by other corresponding names.

[0207] For example, 1 subframe can be called a Transmission Time Interval (TTI), multiple consecutive subframes can also be called a TTI, and 1 time slot or 1 mini time slot can also be called a TTI. That is, at least one of the subframe and the TTI can be a subframe (1ms) in the existing LTE, or a period shorter than 1ms (for example, 1-13 code elements), or a period longer than 1ms. In addition, the unit representing TTI can be a time slot, a mini time slot, etc. instead of a subframe.

[0208] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in the LTE system, the base station schedules the allocation of wireless resources (frequency bandwidth, transmission power, etc. that can be used in each user terminal) to each user terminal in units of TTI. In addition, the definition of TTI is not limited to this.

[0209] TTI can be a transmission time unit for data packets (transport blocks), code blocks, code words, etc. after channel coding, or a processing unit for scheduling, link adaptation, etc. In addition, when TTI is assigned, the time interval (e.g., the number of symbols) to which the transport block, code block, code word, etc. is actually mapped can be shorter than the TTI.

[0210] In addition, when 1 time slot or 1 mini time slot is called TTI, more than one TTI (ie, more than one time slot or more than one mini time slot) can constitute the minimum time unit of scheduling. In addition, the number of time slots (mini time slots) constituting the minimum time unit of scheduling can be controlled.

[0211] A TTI having a time length of 1 ms is also called a normal TTI (TTI in LTE Rel.8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a time slot, etc. A TTI shorter than a normal TTI may be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a mini-time slot, a sub-time slot, a time slot, etc.

[0212] In addition, a long TTI (for example, a normal TTI, a subframe, etc.) can be replaced with a TTI having a time length exceeding 1ms, and a short TTI (for example, a shortened TTI, etc.) can be replaced with a TTI having a TTI length smaller than the long TTI and having a TTI length exceeding 1ms.

[0213] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain. In the frequency domain, it may contain one or more consecutive subcarriers. The number of subcarriers contained in an RB may be the same regardless of the parameter set, for example, it may be 12. The number of subcarriers contained in an RB may also be determined according to the parameter set.

[0214] In addition, the time domain of an RB may include one or more symbols, and may be the length of 1 slot, 1 mini slot, 1 subframe, or 1 TTI. 1 TTI, 1 subframe, etc. may be composed of one or more resource blocks, respectively.

[0215] In addition, one or more RBs may be referred to as a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, and the like.

[0216] In addition, a resource block may be composed of one or more resource elements (RE). For example, 1 RE may be a radio resource region of 1 subcarrier and 1 symbol.

[0217] A Bandwidth Part (BWP) (also called a partial bandwidth, etc.) represents a subset of contiguous common RBs (common resource blocks) for a parameter set in a certain carrier. Here, the common RBs can be identified by the index of the RB based on the common reference point of the carrier. PRBs can be defined in a BWP and numbered within the BWP.

[0218] The BWP may include a BWP for UL (UL BWP) and a BWP for DL ​​(DL BWP). One or more BWPs may be configured for a UE within one carrier.

[0219] At least one of the set BWPs may be active, and it is not assumed that the UE transmits or receives a predetermined signal / channel outside the activated BWP. In addition, "cell", "carrier" and the like in the present disclosure may be replaced with "BWP".

[0220] The above structures of radio frames, subframes, time slots, mini-time slots, and symbols are only examples. For example, the number of subframes included in a radio frame, the number of time slots per subframe or radio frame, the number of mini-time slots included in a time slot, the number of symbols and RBs included in a time slot or mini-time slot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, and the like can be changed in various ways.

[0221] The terms "connected", "coupled" or all variations of these terms are intended to indicate any direct or indirect connection or combination between two or more elements, and may include the situation where there is one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The combination or connection between elements may be a physical combination or connection, a logical combination or connection, or a combination of these. For example, "access" may be used to replace "connection". In the context of the present disclosure, for two elements, it may be considered that they are "connected" or "coupled" to each other by using at least one of one or more wires, cables, and printed electrical connections, and as some non-limiting and non-inclusive examples, by using electromagnetic energy having wavelengths in the wireless frequency domain, microwave region, and light (including both visible and invisible) region, etc.

[0222] The reference signal may be referred to as Reference Signal (RS) for short, or may be referred to as a pilot signal depending on the applied standard.

[0223] The phrase "according to" used in the present disclosure does not mean "only according to" unless otherwise expressly stated. In other words, the phrase "according to" means both "only according to" and "at least according to".

[0224] Any reference to an element using the terms "first", "second", etc. used in this disclosure does not necessarily limit the number and order of these elements. These terms are used in this disclosure as a simple method to distinguish between two or more elements. Therefore, a reference to a first and a second element does not mean that only two elements can be used here or that the first element must precede the second element in any form.

[0225] When the terms "include," "including," and variations thereof are used in the present disclosure, these terms are intended to be inclusive, as is the term "comprising." Furthermore, the term "or" used in the present disclosure does not mean an exclusive or.

[0226] In the present disclosure, when an article is added by translation, such as a, an, and the in English, for example, the present disclosure also includes the case where the noun following the article is in plural form.

[0227] The terms "determining" and "determining" used in the present disclosure sometimes also include a variety of actions. "Determining" and "determining" may include, for example, treating matters that have been judged, calculated, calculated, processed, derived, investigated, searched (for example, searched in a table, database or other data structure), confirmed (ascertaining) as matters that have been "judged" or "determined", etc. In addition, "determining" and "determining" may include treating matters that have been received (for example, receiving information), transmitted (for example, transmitting information), input, output, accessed (for example, accessed data in memory) as matters that have been "judged" or "determined", etc. In addition, "determining" and "determining" may include treating matters that have been resolved (resolving), selected (selecting), chosen (choosing), established (establishing), compared (comparing), etc. as matters that have been "judged" or "determined". That is, "judgment" and "decision" can include any action that is considered to be "judged" or "decided". In addition, "judgment (decision)" can also be replaced by "assuming", "expecting", "considering", etc.

[0228] In the present disclosure, the term "A and B are different" may also mean "A and B are different from each other". In addition, the term may also mean "A and B are different from C, respectively". The terms "separate" and "combined" may also be interpreted in the same way as "different".

[0229] The present disclosure is described in detail above, but it should be clear to those skilled in the art that the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure can be implemented as a modification and variation without departing from the subject matter and scope of the present disclosure as determined by the claims. Therefore, the purpose of the description of the present disclosure is to illustrate and not to have any limiting meaning on the present disclosure.

[0230] Description of symbols

[0231] 10. Wireless communication systems;

[0232] 20 5G-CN

[0233] 100a, 100b Communication nodes

[0234] 101 Sending Department

[0235] 103 Receiving Department

[0236] 105 Beam Control Unit

[0237] 107: Processing Department

[0238] 109: Maintenance Department

[0239] 111: Control Department

[0240] 200: Terminal

[0241] 201 Sending Department

[0242] 203 Receiving Department

[0243] 205 Reception Quality Measurement Unit

[0244] 207 Layer 1 Processing Unit

[0245] 209 Layer 3 Processing Unit

[0246] 211: Maintenance Department

[0247] 213: Control Department

[0248] 1001: Processor

[0249] 1002: Memory

[0250] 1003: Memory

[0251] 1004: Communication device

[0252] 1005: Input device

[0253] 1006: Output device

[0254] 1007: Bus

Claims

1. A terminal comprising: a receiving unit configured to receive a reference signal; a control unit that obtains a weighted average of reception qualities in layer 1 of the reference signal measured during a measurement period; and a sending unit, which sends the obtained weighted average of the reception quality to the data server via the communication node, The receiving unit receives an RRC message from the communication node, the RRC message notifying a timing for transmitting the weighted average of the reception quality, The control unit obtains a weighted average of the reception qualities of the reference signal in layer 1 by multiplying the reception qualities of the reference signal in layer 1 by weighting coefficients, The control unit sets the weighting coefficient so that the weighting coefficient applied to the reception quality measured at a timing close to the transmission timing of the weighted average is larger than the weighting coefficient applied to the reception quality measured at a timing far from the transmission timing.

2. The terminal according to claim 1, wherein: The receiving unit receives a plurality of different reference signals. The control unit obtains, for each reference signal, a weighted average of reception qualities in layer 1 of the reference signal measured during the measurement period.

3. The terminal according to claim 2, wherein: The control unit determines a weighted average of reception qualities indicating the best quality among the weighted averages of reception qualities in layer 1 of the plurality of reference signals, The transmitting unit transmits the determined weighted average of the reception qualities to the data server via the communication node.

4. The terminal according to claim 1, wherein: The transmitting unit transmits the resource information of the reference signal to the data server via the communication node.

5. A wireless communication method, comprising the following steps: The terminal receives an RRC message from the communication node, the RRC message notifying the timing of transmitting the weighted average of the reception quality in layer 1 of the reference signal measured during the measurement period; The terminal receives the reference signal; The terminal obtains a weighted average of the reception qualities; and The terminal sends the obtained weighted average of the reception quality to a data server via the communication node, In the obtaining step, the terminal obtains a weighted average of the reception quality in layer 1 of the reference signal by multiplying the reception quality in layer 1 of the reference signal by a weighting coefficient. In the acquisition step, the terminal sets the weighting coefficient so that the weighting coefficient applied to the reception quality measured at a timing close to the transmission timing of the weighted average is larger than the weighting coefficient applied to the reception quality measured at a timing far from the transmission timing.

6. A communication node, comprising: a transmitting unit configured to transmit a reference signal; and a receiving unit that receives, from a terminal, a weighted average of reception qualities of the reference signal in layer 1 measured during a measurement period, The transmitting unit transmits an RRC message to the terminal, the RRC message notifying a timing of transmitting the weighted average of the reception quality, The terminal obtains a weighted average of the reception quality in layer 1 of the reference signal by multiplying the reception quality in layer 1 of the reference signal by a weighting coefficient, The terminal sets the weighting coefficient so that the weighting coefficient applied to the reception quality measured at a timing close to the transmission timing of the weighted average is greater than the weighting coefficient applied to the reception quality measured at a timing far from the transmission timing, The transmitting unit transmits the received weighted average of the reception qualities to a data server as tracking information of the terminal.

7. A wireless communication system, wherein: The wireless communication system comprises: a terminal; a communication node connected to the terminal; and a data server connected to the communication node. The terminal has: a receiving unit configured to receive a reference signal; a control unit configured to obtain a weighted average of reception qualities in layer 1 of the reference signal measured during a measurement period; as well as a transmitting unit configured to transmit the obtained weighted average of the reception qualities to the communication node, The receiving unit of the terminal receives an RRC message from the communication node, the RRC message notifying the timing of sending the weighted average of the reception quality, The control unit of the terminal obtains a weighted average of the reception qualities of the reference signal in layer 1 by multiplying the reception qualities of the reference signal in layer 1 by weighting coefficients, The control unit of the terminal sets the weighting coefficient so that the weighting coefficient applied to the reception quality measured at a timing close to the transmission timing of the weighted average is greater than the weighting coefficient applied to the reception quality measured at a timing far from the transmission timing, The communication node has: a sending unit configured to send the reference signal; as well as a receiving unit configured to receive the weighted average of the reception qualities from the terminal, The transmission unit of the communication node transmits the received weighted average of the reception qualities to the data server as the tracking information of the terminal.

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