First radio access network node, communication method, and second radio access network node

Abstract

A first radio access network node according to one aspect of the present disclosure comprises: a transmission unit that transmits, to a second radio access network node, a request to monitor the available bit rate in one or both of a downlink and an uplink; and a control unit that controls reception of a report regarding the available bit rate from the second radio access network node.

Description

First wireless access network node, communication method, and second wireless access network node

[0001] This disclosure relates to a first radio access network node, a communication method, and a second radio access network node in a next-generation mobile communication system.

[0002] In the Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) was specified with the aim of achieving even higher data rates and lower latency (Non-Patent Literature 1). Furthermore, LTE-Advanced (3GPP Rel. 10-14) was specified with the aim of further increasing the capacity and sophistication of LTE (Third Generation Partnership Project (3GPP®) Release (Rel.) 8, 9).

[0003] Successor systems to LTE (for example, 5th generation mobile communication system (5G), 5G+ (plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel. 15 and later) are also being considered.

[0004] 3GPP TS 36.300 V8.12.0 “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8)”, April 2010

[0005] In future wireless communication systems (e.g., NR, 6G, etc.), it is being considered that the data network (DN) / core network (CN) will utilize the available bitrate of the radio access network (RAN).

[0006] However, the method for obtaining the available bitrate has not been sufficiently considered. If this consideration is insufficient, there is a risk that communication performance and user experience may be suppressed.

[0007] Therefore, one of the objectives of this disclosure is to provide a first wireless access network node, a communication method, and a second wireless access network node that acquire an appropriate available bitrate.

[0008] A first wireless access network node according to one aspect of the present disclosure includes a transmitting unit that transmits a request to a second wireless access network node for monitoring of the available bitrate on one or both of the downlink and / or uplink, and a control unit that controls the reception of the available bitrate report from the second wireless access network node.

[0009] According to one aspect of this disclosure, communication performance / user experience can be improved.

[0010] Figure 1 shows an example of a service using a wireless communication system. Figure 2 shows an example of a CU-DU separated base station according to Embodiment 1. Figure 3 shows an example of a DL / UL available bitrate monitoring request according to Embodiment 1. Figure 4 shows an example of a DL / UL available bitrate report according to Embodiment 1. Figure 5 shows an example of a RAN for DC according to Embodiment 2. Figure 6 shows an example of a DL / UL available bitrate monitoring request according to Embodiment 2. Figure 7 shows an example of a DL / UL available bitrate report according to Embodiment 2. Figure 8 shows an example of an assistance information data format. Figure 9 is a diagram showing an example of a schematic configuration of a wireless communication system according to one embodiment. Figure 10 is a diagram showing an example of a base station configuration according to one embodiment. Figure 11 is a diagram showing an example of a user terminal configuration according to one embodiment. Figure 12 is a diagram showing an example of a base station and user terminal hardware configuration according to one embodiment. Figure 13 is a diagram showing an example of a vehicle according to one embodiment.

[0011] (Multimodal Services) Strengthening policies related to multimodal services is being considered. A multimodal service is a communication service consisting of multiple interrelated data flows that enable application coordination. Here, it is being considered to send an MMSID (multimodal service ID) from 5GC (5G Core) to the RAN (Radio Access Network) node to identify which service a data flow is associated with, and to perform scheduling for multimodal services at the radio access layer.

[0012] (QoS Flow) A quality of service (QoS) flow is a flow that represents a unit of QoS control. Multiple QoS flows flow through the protocol data unit (PDU) session tunnel between the core network (CN) and the gNB. Each QoS flow is mapped to a separate radio bearer between the gNB and the UE.

[0013] A guaranteed bit rate (GBR) QoS flow is a QoS flow where the bit rate is guaranteed, while a non-GBR QoS flow is a QoS flow where the bit rate is not guaranteed.

[0014] Regarding the available bitrate for GBR QoS flows, it is being considered that, based on policy and changing control (PCC) rules from the policy control function (PCF), the SMF would request the [next generation (NG)-]RAN node to report the available bitrate for UL / DL, and the [NG-]RAN node would report the available bitrate information for UL / DL to the PDU session anchor (PSA) UPF via the general packet radio service tunneling protocol (GPRS tunneling protocol, GTP)-user plane (U) header of the UL packet. The SMF is also considering requesting the PSA UPF to expose the bitrate to the AF directly or via the local network exposure function (NEF).

[0015] (Available Bitrate Monitoring) QoS monitoring for available bitrate allows NG-RAN to measure and report the available bitrate of UL / DL for GBR QoS flows without using alternative QoS profiles. The available data rate refers to the bitrate that NG-RAN can provide for a QoS flow within a given duration. The method by which NG-RAN measures the available bitrate may depend on the NG-RAN implementation. The available bitrate can be between the guaranteed flow bit rate (GBFR) and the maximum flow bit rate (MBFR). In QoS flows using QoS notification control enabled without using alternative QoS profiles, the available bitrate may be below GFBR.

[0016] In reporting available bitrate, when periodic reporting is applied, only threshold-based reporting is applied. For each policy in the QoS monitoring policy, based on PCC rules that include available bitrate as a QoS monitoring parameter and one or more reporting thresholds, the SMF configures the NG-RAN to measure and report available bitrate by sending a QoS monitoring request that includes one or more thresholds. If, based on the QoS monitoring request, the bitrate to which the NG-RAN can apply is greater than or equal to one or more specified reporting thresholds, the NG-RAN reports the available bitrate information for the UL / DL at the highest of the one or more reporting thresholds that are less than or equal to that bitrate to the PSA UPF via the GTP-U header of the UL packet. If the available bitrate of an UL / DL is above a lower threshold, NG-RAN is expected to immediately report the available bitrate of that UL / DL. If the available bitrate of an UL / DL is above a higher threshold with some degree of hysteresis, NG-RAN is expected to report the available bitrate of that UL / DL.

[0017] The SMF may configure a PSA UPF to perform QoS monitoring for available bitrate. In reporting of available bitrate via the PSA UPF, only reporting based on events in the PSA UPF is applicable. One or more reporting thresholds within the PCC rules are not sent to the UPF. Within the UPF, the event for reporting is the receipt of available bitrate information from the NG-RAN. In response to a QoS monitoring request for available bitrate from the SMF, the PSA UPF monitors and publishes the available bitrate information reported from the NG-RAN to the target NF, as instructed.

[0018] During handover, QoS monitoring settings are provided to the target NG-RAN for each QoS flow within the QoS monitoring settings.

[0019] In this disclosure, the terms "available bitrate" and "available datarate" may be interpreted as interchangeable.

[0020] (Monitoring and Publication of Available Data Rates) The monitored data rate is the data rate currently being used by the QoS flow. The monitored data rate is not useful to the Extended Reality Media Application Server (XRM AS) within the DN, as it can measure the data rate being used itself.

[0021] However, the available data rate of the QoS flow is beneficial to XRM AS, which dynamically changes the next slightly later codec in the XRM stream to match the available data rate. The available data rate is as follows, and the next slightly later data rate is provided by NG-RAN and is also supported by NG-RAN for the QoS flow.

[0022] The available data rate can be provided solely by the NG-RAN, based on the NG-RAN's radio resource scheduling for QoS flows, and the available data rate provided by the NG-RAN is further exposed to the AF via the user plane (NG-RAN → UPF → NEF / AF) or the control plane (NG-RAN → AMF → SMF → PCF / NEF → AF).

[0023] NG-RAN can use a similar mechanism to support alternative QoS profiles and provide available data rates for GBR QoS flows.

[0024] However, in non-GBR QoS flows, all non-GBR QoS flows from various multiple UEs compete for the NG-RAN's radio resources, and the NG-RAN must consider many factors when providing available data rates to non-GBR QoS flows based on its radio resource scheduling for those QoS flows. These factors include, for example, the current data rate of the non-GBR QoS flow and how many non-GBR QoS flows have requested reports of their available data rates. For example, if only one non-GBR QoS flow has requested a report of its available data rate, and the total number of non-GBR QoS flows is N (N > 10), the NG-RAN can provide an available data rate of twice the current data rate of that non-GBR QoS flow, allowing the other N-1 non-GBR QoS flows to compete for the remaining available data rates. Another simple way to provide available data rates is to provide the current data usage rates for non-GBR QoS flows that have predictable changes. If there are multiple non-GBR QoS flows requesting available data rate reporting, the reported available data rates will not over-promise the overall available data rates of the NG-RAN for all non-GBR QoS flows, and none of the non-GBR QoS flows will experience a data rate shortage.

[0025] 5G systems (5GS) may publish aggregate maxmum bit rate (AMBR) to trusted third parties. This can be used to derive rate limiting information. Since such information may be less dynamic than monitored available data rates, it can be reported directly to the AF if requested by the AF.

[0026] (Issue 1) In CU-DU split base stations (gNBs), there is insufficient consideration of how a CU can obtain the available bitrate for DL / UL for QoS flows [GBR / non-GBR] in one or more DUs.

[0027] (Issue 2) In dual connectivity (DC), there is insufficient consideration of how the master node (MN) can obtain the available bitrate for DL / UL for QoS flows [MN terminated or SN terminated] [GBR / non-GBR] at one or more secondary nodes (SN).

[0028] If these considerations are insufficient, the CN / DN may not be able to utilize an appropriate available bitrate, potentially leading to reduced communication performance and user experience.

[0029] Therefore, the inventors investigated methods for obtaining the available bitrate of DL / UL and conceived the following embodiments.

[0030] The embodiments of this disclosure will be described in detail below with reference to the drawings. Each wireless communication method according to the embodiments may be applied individually or in combination.

[0031] (Various substitutions) In this disclosure, words enclosed in parentheses () may indicate an explanation of the preceding word (e.g., an explanation of spelling), a paraphrase, a specific example, or supplementary explanation. Also, in this disclosure, words enclosed in square brackets [] may be interpreted as part of the overall meaning of the text, or they may be interpreted as being excluded (ignored). Note that parentheses () and square brackets [] may be used for purposes / meanings other than those described above.

[0032] In this disclosure, "A / B" and "at least one of A and B" may be interpreted as mutually exclusive. In this disclosure, "A / B / C" may mean "at least one of A, B, and C".

[0033] In the present disclosure, notification, activation, deactivation, instruction (or indication), selection, configuration, update, determination, etc., may be substituted for each other. In the present disclosure, supporting, controlling, controllable, operating, operable, etc., may be substituted for each other.

[0034] In the present disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, higher layer parameters, fields, Information Element (IE), configuration, etc., may be substituted for each other. In the present disclosure, Medium Access Control Control Element (MAC CE), update command, activation / deactivation command, etc., may be substituted for each other.

[0035] In the present disclosure, higher layer signaling may be, for example, any one of or a combination of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, other messages (for example, messages from a core network such as positioning protocol messages (e.g., NR Positioning Protocol A (NRPPa) / LTE Positioning Protocol (LPP) messages)), and the like.

[0036] In the present disclosure, for MAC signaling, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), or the like may be used. The broadcast information may be, for example, a Master Information Block (MIB), a System Information Block (SIB), Remaining Minimum System Information (RMSI), Other System Information (OSI), or the like.

[0037] In the present disclosure, for physical layer signaling, for example, Downlink Control Information (DCI), Uplink Control Information (UCI), or the like may be used.

[0038] In the present disclosure, ceil(x), a ceiling function may be interchangeably read with each other. In the present disclosure, floor(x), a floor function may be interchangeably read with each other. In the present disclosure, sqrt(x), the square root of x may be interchangeably read with each other. In the present disclosure, x mod y, mod(x, y), a mod function, a modulo operation may be interchangeably read with each other. In the present disclosure, Σ i=M M+N-1 f(i), Σ i=M M+N-1 f i , the sum of f(i) or f i over i = M, M+1, ..., M+N-1 (summation), f(M)+f(M+1)+...+f(M+N-1), f M +f M+1 +...+f M+N-1 may be interchangeably read with each other. C(n, k) represents the number of combinations for selecting k values from n values (combinatorial coefficient), binomial coefficients, n Ck , C n k may be read interchangeably with each other. In the present disclosure, x / / y and floor(x / y) may be read interchangeably with each other.

[0039] In the present disclosure, A b , A_b, Ab, and the notation with b attached to the lower right of A may be read interchangeably with each other. In the present disclosure, A c , A^c, and the notation with c attached to the upper right of A may be read interchangeably with each other. In the present disclosure, A b c , A_b^c, and the notation with b attached to the lower right of A and c attached to the upper right of A may be read interchangeably with each other. In the present disclosure, x ~ may be represented by adding a tilde over x, and may also be referred to as x tilde. In the present disclosure, x - may be represented by adding a bar over x, and may also be referred to as x bar. In the present disclosure, x ＾ may be represented by adding a caret over x, and may also be referred to as x hat.

[0040] In the present disclosure, FR may be, for example, at least one of FR1, FR2, FR2-1, FR2-2, FR3, sub-terahertz, and terahertz. In the present disclosure, the frequency range corresponding to FR1 may be 410-7125 MHz. In the present disclosure, FR2 may include FR2-1 and FR2-2, the frequency range corresponding to FR2-1 may be 24250-52600 MHz, and the frequency range corresponding to FR2-2 may be 52600-71000 MHz.

[0041] (Wireless communication method) FIG. 1 shows an example of a service using a wireless communication system. A UE may be connected to a radio access network (RAN). The RAN may include one or more RAN nodes. The RAN may be connected to a CN. The CN may include one or more NFs. The CN may be connected to a DN. The DN may include one or more servers. The server may provide a service to the UE via the DN, the CN, and the RAN.

[0042] The service may include, for example, an extended reality (XR) service. The server may be, for example, an XR server that provides XR services.

[0043] In this disclosure, [NG-]RAN[node], base station (BS), next generation nodeB (gNB), MN, SN, logical node, [gNB-]CU, and [gNB-]DU may be interpreted as equivalent to each other. A base station may include at least one of a CU, one or more DUs, an MN, and one or more SNs. An MN may include a CU. An SN may include a DU. In this disclosure, CN, 5GCN, NF, AMF, SMF, PCF, NEF, AF, and [PSA]UPF may be interpreted as equivalent to each other. In this disclosure, DN, external network, [external] server, XR server, application server (AS), and XMR AS may be interpreted as equivalent to each other.

[0044] According to Embodiment 1, in a CU-DU separated base station, the DU can appropriately report the available bitrate of DL / UL to the CU.

[0045] According to Embodiment 2, in the DC, the SN can appropriately report the available bitrate of DL / UL to the MN.

[0046] This wireless communication method allows the RAN to report the appropriate available bitrate to the CN / DN, improving communication performance and user experience. For example, an XR server can dynamically change the appropriate codec based on the available bitrate, further enhancing the user experience.

[0047] <Embodiment 1> Figure 2 shows an example of a CU-DU separated base station. One base station may include one CU and one or more DUs. The CU and DU may be connected via an F1 interface. The CU may be connected to a CN. The DU may be connected to a UE.

[0048] As shown in the example in Figure 3, the CU may send a request to the DU for monitoring the available bitrate of the DL / UL using the application protocol (F1-AP) on the F1 interface. This request may be included in a message from the CU to the DU, or it may be a QoS flow level QoS parameter [for a specific QoS flow] within that message. The message may be a UE context setup request or a UE context modification request. This request allows the CU to request the DU to measure the available bitrate of the DL / UL for a specific QoS flow during a specific period.

[0049] Upon receiving such a request, the DU may measure the available bitrate of the DL / UL [for a specific QoS flow] over a specific period and send a report of the available bitrate of the DL / UL to the CU using the user plane (F1-U) on the F1 interface, as shown in the example in Figure 4. This report may be included in a message from the DU to the CU. This message may be an assistance information data (PDU type 2) frame.

[0050] The CU may calculate the available bitrate information for the RAN / base station for the QoS flow based on the available bitrate of the CU [measured by itself] and the available bitrate of the DU [reported], and report the available bitrate information to the CN. Here, the CU may calculate the available bitrate information for the DL / UL for the QoS flow based on the minimum of the available bitrate of the DL / UL for the CU for the QoS flow and the available bitrate of the DL / UL for the DU for the QoS flow (taking bottlenecks into consideration).

[0051] If a UE is connected to multiple DUs connected to a single CU, the CU may send a request for DL / UL available bitrate monitoring to each of the multiple DUs and receive a report of the DL / UL available bitrate from each of the multiple DUs. The CU may calculate the DL / UL available bitrate information for the QoS flow based on the minimum of the DL / UL available bitrate of the CU for the QoS flow and the sum of the DL / UL available bitrates of the multiple DUs for the QoS flow (taking bottlenecks into consideration).

[0052] <Embodiment 2> Figure 5 shows an example of a RAN for a DC. The RAN / base station may include one MN and one or more SNs. The MN and SN may be connected via an Xn interface. The MN and SN may be connected to a CN. The MN and SN may be connected to a UE.

[0053] As shown in the example in Figure 6, the MN may send a request to the SN for monitoring the available bitrate of the DL / UL using the application protocol (Xn-AP) on the Xn interface. This request may be included in a message from the MN to the SN, or it may be a QoS flow level QoS parameter [for a specific QoS flow] within that message. The message may be a secondary (S) node addition request (S-NODE ADDITION REQUEST) or an S-node modification request (S-NODE MODIFICATION REQUEST). This request allows the MN to request the SN to measure the available bitrate of the DL / UL for a specific QoS flow during a specific period.

[0054] Upon receiving such a request, the SN may measure the available bitrate of the DL / UL [for a specific QoS flow] over a specific period and send a report of the available bitrate of the DL / UL to the MN using the user plane (Xn-U) on the Xn interface, as shown in the example in Figure 7. This report may be included in a message from the SN to the MN. This message may be an assistance information data (PDU type 2) frame.

[0055] The MN may calculate the available bitrate information for the RAN / base station for the QoS flow based on the available bitrate of the MN [measured by itself] and the available bitrate of the SN [reported], and report the available bitrate information to the CN. Here, the MN may calculate the available bitrate information for the DL / UL for the QoS flow based on the sum of the available bitrate of the MN's DL / UL for the QoS flow and the available bitrate of the SN's DL / UL for the QoS flow.

[0056] <Variations> The following variations may be applied to each of the above embodiments.

[0057] The specific period over which the DL / UL available bitrate is measured may be notified / set / instructed in the DL / UL available bitrate monitoring request, defined in the specification, or depend on the UE implementation. The specific period may be notified / defined by at least one of the following: start time, end time, duration, time offset from the request, and measurement period. The request may include information indicating the QoS flow.

[0058] DL / UL reporting of available bitrate may have a reporting type (time-domain behavior) that includes at least one of periodic, semi-persistent, aperiodic, and event-triggered. The reporting type may be notified / configured / instructed in the request, defined in the specification, or dependent on the UE implementation. The timing of the report may be notified / defined by at least one of the time offset from the request, the reporting period, and an event. The event / condition that triggers the report may be that the change in available bitrate (the amount of change [within a specific period]) exceeds a threshold.

[0059] Figure 8 shows an example of the format of assistance information data. This frame format is defined so that a node hosting a PDCP entity can receive assistance information. The assistance information data may include at least one of the following fields: UL available bitrate information indication, DL available bitrate information indication, UL available bitrate information, and DL available bitrate information. The UL available bitrate information indication field may indicate the presence of the UL available bitrate information field. In this field, a value of 0 indicates that the UL available bitrate information field does not exist, and a value of 1 indicates that the UL available bitrate information field exists. The DL available bitrate information indication field may indicate the presence of the DL available bitrate information field. In this field, a value of 0 indicates that the DL available bitrate information field does not exist, and a value of 1 indicates that the DL available bitrate information field exists. The UL available bitrate information field may indicate the UL available bitrate measured by the source DU. The DL available bitrate information field may indicate the DL available bitrate as measured by the source DU.

[0060] A CN that has received DL / UL available bitrate information for QoS flow from a RAN node (CU / MN) may send the available bitrate information to the server [upon request from the server]. A server that has received the available bitrate information from the CN may change / optimize the service parameters based on the available bitrate information. For example, an XR server that has received the available bitrate information from the CN may dynamically change / optimize the codec for the XR service based on the available bitrate information.

[0061] <Supplement> <<Notification of Information to UE>> In the embodiments described above, notification of any information from the Network (NW) (e.g., Base Station (BS)) to the UE (in other words, reception of any information from the BS at the UE) may be performed using physical layer signaling (e.g., DCI), higher layer signaling (e.g., RRC signaling, MAC CE, RRC messages, LTE positioning protocol (LPP) messages), specific signals / channels (e.g., DCI, PDCCH, PDSCH, reference signals), or a combination thereof.

[0062] When the above notification is made by a MAC CE, the MAC CE may be identified by the inclusion of a new Logical Channel ID (LCID) not defined in existing standards in the MAC subheader. The MAC CE may be an extension of an existing MAC CE. For example, the MAC CE may introduce a new octet into an existing MAC CE.

[0063] If the above notification is made by DCI, the notification may be made by a specific field of the DCI, a Radio Network Temporary Identifier (RNTI) used to scramble the Cyclic Redundancy Check (CRC) bits assigned to the DCI, or the format of the DCI. The specific field may be an existing DCI field or a new DCI field. The RNTI may be an existing RNTI or a new RNTI. The format of the DCI may be an existing DCI format or a new DCI format.

[0064] Furthermore, notification of any information to the UE in the above-described embodiment may be periodic, semi-persistent (triggered by the UE or gNB), or aperiodic (triggered by the UE or gNB).

[0065] In the embodiments described above, the UE may receive at least one piece of information (QCL information) from the NW from among several of the following QCL rules / QCL types: ◆ QCL type A (Doppler shift, Doppler spread, mean delay, and delay spread) ◆ QCL type B (Doppler shift and Doppler spread) ◆ QCL type C (Doppler shift and mean delay) ◆ QCL type D (spatial reception parameters)

[0066] In the embodiments described above, the QCL source RS for each QCL type may be at least one of the following RSs: ◆SSB ◆CSI-RS with / without repetition ◆TRS ◆DMRS for PDCCH / PDSCH

[0067] In the embodiments described above, information from the network may be set / instructed by the following methods: ◆ Common to multiple UEs, or individual to a UE ◆ Cell-specific, or common to multiple cells ◆ Per UE / Per CC / Per BWP / Per band / Per cell / Per cell group (CG)

[0068] <<Notification of Information from UE>> Notification of any information from the UE to the NW in the embodiments described above (in other words, transmission / reporting of any information from the UE to the BS) may be performed using physical layer signaling (e.g., UCI), higher layer signaling (e.g., RRC signaling, MAC CE, RRC messages, LPP messages), specific signals / channels (e.g., UCI, PUCCH, PUSCH, PRACH, reference signals), or a combination thereof.

[0069] When the above notification is made by a MAC CE, the MAC CE may be identified by the inclusion of a new LCID not specified in existing standards in the MAC subheader. The MAC CE may be an extension of an existing MAC CE. For example, the MAC CE may introduce a new octet into an existing MAC CE.

[0070] If the above notice is made by the UCI, the notice may be transmitted using PUCCH or PUSCH.

[0071] Furthermore, the notification of any information from the UE in the above-described embodiments may be periodic, semi-persistent (triggered by the UE or gNB), or aperiodic (triggered by the UE or gNB).

[0072] <<Regarding the application of each embodiment>> In UE / BS, specific (one or more) processes / operations / controls / assumptions / information for at least one of the embodiments described above may be applied (or used) if any or more of the following conditions are met: ◆ A higher-layer parameter indicating the specific process / operation / control / assumption / information is set; ◆ The specific process / operation / control / assumption / information is determined based on the relevant higher-layer parameter; ◆ The specific process / operation / control / assumption / information is designated / activated / triggered by MAC CE / DCI / UCI / Resource / Channel / RS; ◆ A specific UE capability indicating (or related to) the specific process / operation / control / assumption / information is reported or supported; ◆ The application of the specific process / operation / control / assumption / information is determined based on specific conditions.

[0073] The above-mentioned specific UE capabilities may represent at least one of the following: ◆ Supporting the above-mentioned specific processing / operation / control / assumption / information; ◆ The capability of each embodiment; ◆ The capability of each option in each embodiment, or the capability of a combination of multiple options in each embodiment; ◆ The capability of each choice in each embodiment, or the capability of a combination of multiple choices in each embodiment.

[0074] Furthermore, the above-mentioned specific UE capability may be a capability that applies across all frequencies (commonly regardless of frequency), a capability per frequency (e.g., one or a combination thereof, such as cell, band, band combination, BWP, component carrier, etc.), a capability per frequency range (e.g., Frequency Range 1 (FR1), FR2, FR3, FR4, FR5, FR2-1, FR2-2), a capability per subcarrier spacing (SCS), a capability per feature set (FS) or feature set per component-carrier (FSPC), or a capability per functionality / model.

[0075] Furthermore, the specific UE capabilities described above may be capabilities that apply across all duplexing schemes (common to all duplexing schemes regardless of the duplexing scheme), or they may be capabilities specific to each duplexing scheme (e.g., Time Division Duplex (TDD), Frequency Division Duplex (FDD)).

[0076] If the above conditions are not met, UE / BS may follow the behavior specified in existing 3GPP releases.

[0077] Information regarding whether one or more of the above embodiments / options / choices / examples apply / are used, or which of the above embodiments / options / choices / examples apply / are used, may be based on several of the following methods: ◆ The information is set by one or more higher layer parameters / RRC IEs. ◆ The information is determined by one or more relevant higher layer parameters / RRC IEs. ◆ The information is indicated by MAC CE / DCI. ◆ The information is determined based on one or more UE capabilities. ◆ The information is described / defined in the specification. ◆ The information is based on conditions described / defined in the specification. ◆ The information is determined by a combination of several of the above methods. For example, the information is determined by the setting / indication of higher layer parameters / MAC CE / DCIs and reported by UE capabilities.

[0078] The above multiple embodiments / options / choices may be combined into a single embodiment / option / choice.

[0079] In the embodiments described above, the measured RS may be a QCL source RS in an active TCI state / indicated / unified TCI state.

[0080] (Note) The following inventions are added with respect to one embodiment of the present disclosure. <Note 1> A first wireless access network node having: a transmitting unit that transmits a request to a second wireless access network node for monitoring of the available bitrate on one or both of the downlink and uplink; and a control unit that controls receiving a report of the available bitrate from the second wireless access network node. <Note 2> The first wireless access network node according to Note 1, wherein the control unit calculates available bitrate information for quality of service (QoS) flow in the first wireless access network node and the second wireless access network node based on the available bitrate, and controls transmitting the available bitrate information to the core network. <Note 3> The first wireless access network node according to Note 1 or Note 2, wherein the first wireless access network node is a centralized unit (CU), and the second wireless access network node is a distributed unit (DU). <Note 4> The first wireless access network node described in any of Notes 1 to 3, wherein the first wireless access network node is a master node (MN) and the second wireless access network node is a secondary node (SN). <Note A> The second wireless access network node has a receiving unit that receives a request from the first wireless access network node to monitor the available bitrate on one or both of the downlink and uplink, and a control unit that controls the transmission of the report of the available bitrate to the first wireless access network node.

[0081] <Supplement> The first radio access network node in Appendix 1 to Appendix 4 may be at least one of CU, MN, or part or all of the base station 10. The second radio access network node in Appendix A may be at least one of DU, SN, or part or all of the base station 10. The transmitting / receiving unit in Appendix 1 to Appendix 4 and Appendix A may be a transmission path interface 140. The control unit in Appendix 1 to Appendix 4 and Appendix A may be a control unit 110.

[0082] (Wireless Communication System) The configuration of a wireless communication system according to one embodiment of this disclosure will be described below. In this wireless communication system, communication is performed using any of the wireless communication methods according to the above embodiments of this disclosure, or a combination thereof.

[0083] Figure 9 shows an example of a schematic configuration of a wireless communication system according to one embodiment. The wireless communication system 1 (which may also be simply called system 1) may be a system that realizes communication using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), etc., as specified by the Third Generation Partnership Project (3GPP).

[0084] Furthermore, the wireless communication system 1 may support dual connectivity between multiple Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC may include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), and the like.

[0085] In EN-DC, the LTE (E-UTRA) base station (eNB) is the Master Node (MN), and the NR base station (gNB) is the Secondary Node (SN). In NE-DC, the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.

[0086] The wireless communication system 1 may support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity where both MN and SN are NR base stations (gNB) (NR-NR Dual Connectivity (NN-DC))).

[0087] The wireless communication system 1 may include a base station 11 that forms a macrocell C1 with relatively wide coverage, and base stations 12 (12a-12c) located within the macrocell C1 that form a small cell C2 that is narrower than the macrocell C1. User terminals 20 may be located within at least one cell. The arrangement, number, shape, size, etc., of each cell and user terminal 20 are not limited to the configuration shown in the figure. Hereinafter, when base stations 11 and 12 are not distinguished, they will be collectively referred to as base station 10.

[0088] The wireless communication system 1 may utilize Multi Input Multi Output (MIMO). For example, one cell may be formed by one antenna / base station 10, or by multiple antennas / base stations 10. One [virtual] cell (which may be called a supercell, for example) may be composed of multiple [virtual] cells (which may be called subcells, for example). A supercell may correspond to a cell with a fixed physical range, and a subcell may correspond to a cell whose physical range fluctuates quasi-statically / dynamically. In this case, the wireless communication system 1 may be called a cell-free system.

[0089] The user terminal 20 may be connected to at least one of the multiple base stations 10. The user terminal 20 may utilize at least one of Carrier Aggregation (CA) using multiple Component Carriers (CC) and Dual Connectivity (DC).

[0090] Each CC may be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the second frequency band (Frequency Range 2 (FR2)). A macrocell C1 may be included in FR1, and a small cell C2 may be included in FR2. For example, FR1 may be a frequency band of 6 GHz or less (sub-6 GHz), and FR2 may be a frequency band above 24 GHz. Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may be in a frequency band higher than FR2.

[0091] Furthermore, the user terminal 20 may communicate in each CC using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD).

[0092] Multiple base stations 10 may be connected by wire (e.g., optical fiber compliant with Common Public Radio Interface (CPRI), X2 / Xn interface, etc.) or wireless (e.g., NR communication). For example, when NR communication is used as a backhaul between base stations 11 and 12, base station 11, which is the upstream station, may be called an Integrated Access Backhaul (IAB) donor, and base station 12, which is the relay station, may be called an IAB node.

[0093] Base station 10 may be connected to the core network 30 via other base stations 10 or directly. The core network 30 may include at least one of the following: Evolved Packet Core (EPC), 5G Core Network (5GCN), Next Generation Core (NGC), etc.

[0094] The core network 30 may include network functions (NF) such as User Plane Function (UPF), Access and Mobility Management Function (AMF), Session Management Function (SMF), Unified Data Management (UDM), Application Function (AF), Data Network (DN), Location Management Function (LMF), and Operation, Administration and Maintenance (Management) (OAM). Multiple functions may be provided by a single network node. Furthermore, communication with an external network (e.g., the Internet) may occur via the DN.

[0095] The user terminal 20 may be a terminal that supports at least one of the following communication methods: LTE, LTE-A, 5G, etc.

[0096] In the wireless communication system 1, an orthogonal frequency division multiplexing (OFDM)-based wireless access scheme may be used. For example, Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-OFDM), etc., may be used in at least one of the downlink (DL) and uplink (UL).

[0097] The wireless access method may also be called a waveform. In wireless communication system 1, other wireless access methods (for example, other single-carrier transmission methods, other multi-carrier transmission methods) may be used for the UL and DL wireless access methods.

[0098] In the wireless communication system 1, a Physical Downlink Shared Channel (PDSCH), a Broadcast Channel (PBCH), or a Physical Downlink Control Channel (PDCCH) may be used as the downlink channel, which is shared by each user terminal 20.

[0099] Furthermore, in the wireless communication system 1, the uplink channel may include a Physical Uplink Shared Channel (PUSCH), a Physical Uplink Control Channel (PUCCH), a Physical Random Access Channel (PRACH), or the like, all of which are shared by each user terminal 20.

[0100] User data, higher-layer control information, and System Information Blocks (SIBs) are transmitted via PDSCH. User data and higher-layer control information may also be transmitted via PUSCH. Furthermore, Master Information Blocks (MIBs) may be transmitted via PBCH.

[0101] Lower-layer control information may be transmitted by PDCCH. The lower-layer control information may include, for example, Downlink Control Information (DCI) which includes scheduling information for at least one of PDSCH and PUSCH.

[0102] Furthermore, the DCI that schedules PDSCH may be called DL assignment, DL DCI, etc., and the DCI that schedules PUSCH may be called UL grant, UL DCI, etc. Furthermore, PDSCH may be read as DL data, and PUSCH may be read as UL data.

[0103] PDCCH detection may utilize a Control Resource Set (CORESET) and a search space. A CORESET corresponds to the resources used to search for DCIs. A search space corresponds to the search area and search method for PDCCH candidates. A single CORESET may be associated with one or more search spaces. A UE may monitor CORESETs associated with a given search space based on the search space configuration.

[0104] A single search space may correspond to one or more PDCCH candidates corresponding to aggregation levels. One or more search spaces may be referred to as a search space set. In this disclosure, "search space," "search space set," "search space configuration," "search space set configuration," "CORESET," and "CORESET configuration" may be interpreted interchangeably.

[0105] PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), delivery acknowledgment information (for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and scheduling request (SR). PRACH may transmit a random access preamble for establishing a connection with the cell.

[0106] In this disclosure, downlinks, uplinks, etc., may be expressed without the prefix "link." Also, the prefix "physical" may be omitted from the names of various channels.

[0107] In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), etc., may be transmitted. In the wireless communication system 1, the DL-RS may include a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), a phase tracking reference signal (PTRS), etc.

[0108] The synchronization signal may be, for example, at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS). A signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may be called an SS / PBCH block, SS Block (SSB), etc. Note that SS, SSB, etc. may also be called reference signals.

[0109] Furthermore, in the wireless communication system 1, the uplink reference signal (UL-RS) may include a sounding reference signal (SRS), a demodulation reference signal (DMRS), etc. The DMRS may also be called a user-specific reference signal (UE-specific Reference Signal).

[0110] (Base Station) Figure 10 shows an example of the configuration of a base station according to one embodiment. The base station 10 includes a control unit 110, a transmitting / receiving unit 120, a transmitting / receiving antenna 130, and a transmission line interface 140. Note that one or more of the control unit 110, the transmitting / receiving unit 120, the transmitting / receiving antenna 130, and the transmission line interface 140 may be provided.

[0111] In this example, the functional blocks of the characteristic parts of this embodiment are mainly shown, and it may be assumed that the base station 10 also has other functional blocks necessary for wireless communication. Some of the processing of each part described below may be omitted.

[0112] The control unit 110 controls the entire base station 10. The control unit 110 can be composed of a controller, control circuit, etc., as described based on common understanding in the technical field related to this disclosure.

[0113] The control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may also control transmission and reception, measurement, etc., using the transmitting / receiving unit 120, transmitting / receiving antenna 130, and transmission path interface 140. The control unit 110 may generate data to be transmitted as signals, control information, sequences, etc., and transfer them to the transmitting / receiving unit 120. The control unit 110 may also perform call processing of communication channels (setting, releasing, etc.), status management of the base station 10, management of wireless resources, etc.

[0114] The transmitting / receiving unit 120 may include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212. The transmitting / receiving unit 120 can be composed of a transmitter / receiver, RF circuit, baseband circuit, filter, phase shifter, measurement circuit, transmitting / receiving circuit, etc., as described based on common understanding in the art relating to this disclosure.

[0115] The transmitting / receiving unit 120 may be configured as an integrated transmitting / receiving unit, or it may be composed of a transmitting unit and a receiving unit. The transmitting unit may consist of a transmitting processing unit 1211 and an RF unit 122. The receiving unit may consist of a receiving processing unit 1212, an RF unit 122 and a measuring unit 123.

[0116] The transmitting and receiving antenna 130 can be composed of an antenna described based on common understanding in the art relating to this disclosure, such as an array antenna.

[0117] The transmitting / receiving unit 120 may transmit the downlink channel, synchronization signal, downlink reference signal, etc. The transmitting / receiving unit 120 may also receive the uplink channel, uplink reference signal, etc.

[0118] The transmitting / receiving unit 120 may use digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like to form at least one of the transmitting beam and the receiving beam.

[0119] The transmitting / receiving unit 120 (transmission processing unit 1211) may perform processing on data and control information acquired from the control unit 110, for example, at the Packet Data Convergence Protocol (PDCP) layer, the Radio Link Control (RLC) layer (e.g., RLC retransmission control), and the Medium Access Control (MAC) layer (e.g., HARQ retransmission control), to generate a bit sequence to be transmitted.

[0120] The transmitting / receiving unit 120 (transmission processing unit 1211) may perform transmission processing on the bit sequence to be transmitted, such as channel coding (which may include error correction coding), modulation, mapping, filtering, discrete Fourier transform (DFT) processing (if necessary), inverse fast Fourier transform (IFFT) processing, precoding, and digital-to-analog conversion, and output a baseband signal.

[0121] The transmitting / receiving unit 120 (RF unit 122) may perform modulation, filtering, amplification, etc., of the baseband signal to the radio frequency band and transmit the signal in the radio frequency band via the transmitting / receiving antenna 130.

[0122] On the other hand, the transmitting / receiving unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc., on the radio frequency band signal received by the transmitting / receiving antenna 130.

[0123] The transmitting / receiving unit 120 (receiving processing unit 1212) may apply reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal to acquire user data, etc.

[0124] The transmitting / receiving unit 120 (measurement unit 123) may perform measurements related to the received signal. For example, the measurement unit 123 may perform Radio Resource Management (RRM) measurements, Channel State Information (CSI) measurements, etc., based on the received signal. The measurement unit 123 may also measure received power (e.g., Reference Signal Received Power (RSRP)), reception quality (e.g., Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 110.

[0125] The transmission path interface 140 may send and receive signals (backhaul signaling) with devices included in the core network 30 (e.g., network nodes providing NF), other base stations 10, etc., and may acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

[0126] In this disclosure, the transmitting and receiving units of the base station 10 may consist of at least one of a transmitting / receiving unit 120, a transmitting / receiving antenna 130, and a transmission path interface 140.

[0127] The base station 10 may be separated into three elements: a Radio Unit (RU), a Distributed Unit (DU), and a Central Unit (CU). For example, the RU may implement RF processing (digital beamforming, digital-to-analog conversion, analog beamforming, etc.) and lower-level physical layer functions (precoding, IFFT, FFT, etc.). The DU may implement higher-level physical layer functions (coding to resource element mapping, etc.), MAC layer functions, and RLC layer functions. The CU may implement PDCP layer, Service Data Adaptation Protocol (SDAP) layer, and RRC layer functions.

[0128] In this disclosure, base station 10 may include a single device that implements all the functions of RU, DU, and CU, or it may include multiple devices that each implement some of the functions of RU, DU, and CU and are connected to each other. In this disclosure, base station 10 may be interpreted as RU / DU / CU.

[0129] (User Terminal) Figure 11 shows an example of the configuration of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transmitting / receiving unit 220, and a transmitting / receiving antenna 230. Note that one or more of the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may be provided.

[0130] In this example, the functional blocks of the characteristic parts of this embodiment are mainly shown, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. Some of the processing of each part described below may be omitted.

[0131] The control unit 210 controls the entire user terminal 20. The control unit 210 can be composed of a controller, control circuit, etc., as described based on common understanding in the technical field related to this disclosure.

[0132] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may also control transmission and reception, measurement, etc., using the transmitting / receiving unit 220 and the transmitting / receiving antenna 230. The control unit 210 may generate data to be transmitted as signals, control information, sequences, etc., and transfer them to the transmitting / receiving unit 220.

[0133] The transmitting / receiving unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212. The transmitting / receiving unit 220 can be composed of a transmitter / receiver, RF circuit, baseband circuit, filter, phase shifter, measurement circuit, transmitting / receiving circuit, etc., as described based on common understanding in the art relating to this disclosure.

[0134] The transmitting / receiving unit 220 may be configured as an integrated transmitting / receiving unit, or it may be composed of a transmitting unit and a receiving unit. The transmitting unit may consist of a transmitting processing unit 2211 and an RF unit 222. The receiving unit may consist of a receiving processing unit 2212, an RF unit 222 and a measuring unit 223.

[0135] The transmitting and receiving antenna 230 can be composed of an antenna described based on common understanding in the art relating to this disclosure, such as an array antenna.

[0136] The transmitting / receiving unit 220 may receive the downlink channel, synchronization signal, downlink reference signal, etc. The transmitting / receiving unit 220 may also transmit the uplink channel, uplink reference signal, etc.

[0137] The transmitting / receiving unit 220 may use digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like to form at least one of the transmitting beam and the receiving beam.

[0138] The transmitting / receiving unit 220 (transmission processing unit 2211) may perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc., on data and control information acquired from the control unit 210 to generate a bit sequence to be transmitted.

[0139] The transmitting / receiving unit 220 (transmission processing unit 2211) may perform transmission processing on the bit sequence to be transmitted, such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion, and output a baseband signal.

[0140] Whether or not to apply DFT processing may be based on the transform precoding settings. The transmitting / receiving unit 220 (transmission processing unit 2211) may perform DFT processing as part of the transmission process to transmit a channel (for example, PUSCH) using a DFT-s-OFDM waveform if transform precoding is enabled for that channel, or it may not perform DFT processing as part of the transmission process if transform precoding is not enabled for that channel.

[0141] The transmitting / receiving unit 220 (RF unit 222) may perform modulation, filtering, amplification, etc., of the baseband signal to the radio frequency band and transmit the signal in the radio frequency band via the transmitting / receiving antenna 230.

[0142] On the other hand, the transmitting / receiving unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc., on the radio frequency band signal received by the transmitting / receiving antenna 230.

[0143] The transmitting / receiving unit 220 (receiving processing unit 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal to acquire user data, etc.

[0144] The transmitting / receiving unit 220 (measuring unit 223) may perform measurements related to the received signal. For example, the measuring unit 223 may perform RRM measurement, CSI measurement, etc., based on the received signal. The measuring unit 223 may also measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 210.

[0145] The measurement unit 223 may derive channel measurements for CSI calculation based on channel measurement resources. Channel measurement resources may be, for example, Non Zero Power (NZP) CSI-RS resources. The measurement unit 223 may also derive interference measurements for CSI calculation based on interference measurement resources. Interference measurement resources may be at least one of the following: NZP CSI-RS resources for interference measurement, CSI-Interference Measurement (IM) resources, etc. CSI-IM may also be called CSI-Interference Management (IM), and may be interpreted interchangeably with Zero Power (ZP) CSI-RS. In this disclosure, CSI-RS, NZP CSI-RS, ZP CSI-RS, CSI-IM, CSI-SSB, etc., may be interpreted interchangeably.

[0146] In this disclosure, the transmitting unit and receiving unit of the user terminal 20 may be composed of at least one of a transmitting / receiving unit 220 and a transmitting / receiving antenna 230.

[0147] (Hardware Configuration) The block diagram used in the description of the above embodiment shows functional units. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized using one device that is physically or logically coupled, or it may be realized using two or more physically or logically separated devices that are directly or indirectly connected (for example, using wired or wireless connections). A functional block may also be realized by combining the above one device or the above multiple devices with software.

[0148] Here, functions include, but are not limited to, judgment, decision, determination, calculation, calculation, processing, derivation, investigation, exploration, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating (mapping), and assigning. For example, a functional block (configuration part) that enables transmission may be called a transmitting unit or transmitter. In all cases, as mentioned above, the method of implementation is not particularly limited.

[0149] For example, a base station, user terminal, etc. in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure. Figure 12 is a diagram showing an example of the hardware configuration of a base station and user terminal according to one embodiment. The base station 10 and user terminal 20 described above may be physically configured as a computer device including a processor 1001, memory 1002, storage 1003, communication device 1004, input device 1005, output device 1006, bus 1007, etc.

[0150] In this disclosure, terms such as apparatus, circuit, device, section, and unit are interchangeable. The hardware configuration of the base station 10 and the user terminal 20 may include one or more of the devices shown in the figure, or it may be configured without some of the devices.

[0151] For example, although only one processor 1001 is shown in the diagram, there may be multiple processors. Furthermore, the processing may be performed by one processor, or it may be performed by two or more processors simultaneously, sequentially, or by other means. Note that the processor 1001 may be implemented using one or more chips.

[0152] Each function in the base station 10 and the user terminal 20 is realized, for example, by loading predetermined software (programs) onto hardware such as the processor 1001 and memory 1002, which allows the processor 1001 to perform calculations and control communication via the communication device 1004, or control at least one of reading and writing data in the memory 1002 and storage 1003.

[0153] The processor 1001 controls the entire computer, for example, by running an operating system. The processor 1001 may be composed of a central processing unit (CPU) that includes interfaces with peripheral devices, control devices, arithmetic units, registers, etc. For example, at least a part of the control unit 110 (210) and the transmitting / receiving unit 120 (220) described above may be implemented by the processor 1001.

[0154] Furthermore, the processor 1001 reads programs (program code), software modules, data, etc., from at least one of the storage 1003 and the communication device 1004 into the memory 1002 and executes various processes accordingly. The program used is one that causes the computer to execute at least a part of the operations described in the above embodiment. For example, the control unit 110 (210) may be implemented by a control program stored in the memory 1002 and running on the processor 1001, and other functional blocks may be implemented similarly.

[0155] The memory 1002 is a computer-readable recording medium and may consist of at least one of the following: Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EPROM (EEPROM), Random Access Memory (RAM), or other suitable storage medium. The memory 1002 may also be called a register, cache, or main memory. The memory 1002 can store executable programs (program code), software modules, etc., for carrying out a wireless communication method according to one embodiment of the present disclosure.

[0156] The storage 1003 is a computer-readable recording medium and may consist of at least one of the following: a flexible disk, a floppy disk, a magneto-optical disk (e.g., a Compact Disk (Compact Disc ROM (CD-ROM)), a Digital Use Disk, a Blu-ray (registered trademark) disk), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, stick, key drive), a magnetic stripe, a database, a server, or other suitable storage medium. The storage 1003 may also be called an auxiliary storage device.

[0157] The communication device 1004 is hardware (transmitting / receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, network controller, network card, communication module, etc. The communication device 1004 may be configured to include, for example, a high-frequency switch, duplexer, filter, frequency synthesizer, etc., in order to implement at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, the above-mentioned transmitting / receiving unit 120 (220), transmitting / receiving antenna 130 (230), etc., may be implemented by the communication device 1004. The transmitting / receiving unit 120 (220) may be implemented with physically or logically separated transmitting unit 120a (220a) and receiving unit 120b (220b).

[0158] The input device 1005 is an input device that accepts input from an external source (e.g., a keyboard, mouse, microphone, switch, button, sensor, etc.). The output device 1006 is an output device that outputs to an external source (e.g., a display, speaker, light-emitting diode (LED) lamp, etc.). The input device 1005 and the output device 1006 may be configured as an integrated unit (e.g., a touch panel).

[0159] Furthermore, each device, such as the processor 1001 and memory 1002, is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or different buses may be configured for each device.

[0160] Furthermore, the base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a programmable logic device (PLD), and a field programmable gate array (FPGA), and some or all of each functional block may be implemented using such hardware. For example, the processor 1001 may be implemented using at least one of these hardware components.

[0161] Furthermore, devices included in the core network 30 (for example, network nodes that provide NF) may also be implemented using the functional block / hardware configuration described above.

[0162] (Variations) Terms used in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, channel, symbol and signal (signal or signaling) may be used interchangeably. Also, a signal may be a message. A reference signal may be abbreviated as RS and may be called a pilot, pilot signal, etc., depending on the applicable standard. Also, a component carrier (CC) may be called a cell, frequency carrier, carrier frequency, etc.

[0163] A wireless frame may consist of one or more periods (frames) in the time domain. Each of these periods (frames) constituting a wireless frame may be called a subframe. Furthermore, a subframe may consist of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0164] Here, the neurology may be communication parameters applied to at least one of the transmission and reception of a signal or channel. The neurology may be, for example, at least one of the following: subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration, specific filtering processes performed by the transceiver in the frequency domain, and specific windowing processes performed by the transceiver in the time domain.

[0165] A slot may consist of one or more symbols in the time domain (such as Orthogonal Frequency Division Multiplexing (OFDM) symbols or Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols). Alternatively, a slot may be a time unit based on neurology.

[0166] A slot may include multiple minislots. Each minislot may consist of one or more symbols in the time domain. Minislots may also be called subslots. Minislots may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called a PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using minislots may be called a PDSCH (PUSCH) mapping type B.

[0167] Wireless frames, subframes, slots, minislots, and symbols all represent units of time when transmitting a signal. Wireless frames, subframes, slots, minislots, and symbols may each be referred to by different names. Furthermore, the units of time such as frames, subframes, slots, minislots, and symbols in this disclosure may be interpreted as interchangeable.

[0168] For example, one subframe may be called a TTI, multiple consecutive subframes may be called a TTI, and one slot or one mini-slot may be called a TTI. In other words, at least one of a subframe and a TTI may be a subframe in existing LTE (1 ms), a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms. Note that the unit representing a TTI may be called a slot, mini-slot, etc., instead of a subframe.

[0169] Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, the base station schedules each user terminal to allocate wireless resources (such as the frequency bandwidth and transmission power available to each user terminal) in TTI units. However, the definition of TTI is not limited to this.

[0170] TTI may be a transmission time unit for channel-encoded data packets (transport blocks), code blocks, code words, etc., or it may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the actual time interval (e.g., number of symbols) in which the transport block, code block, code word, etc. are mapped may be shorter than the TTI.

[0171] Furthermore, if one slot or one mini-slot is referred to as a TTI, then one or more TTIs (i.e., one or more slots or one or more mini-slots) may constitute the minimum time unit for scheduling. In addition, the number of slots (number of mini-slots) that constitute this minimum time unit for scheduling may be controlled.

[0172] A TTI with a time length of 1 ms may be called a normal TTI, long TTI, normal subframe, long subframe, slot, etc. A TTI shorter than a normal TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, mini slot, sub slot, slot, etc.

[0173] Furthermore, long TTIs (e.g., normal TTIs, subframes, etc.) may be interpreted as TTIs with a time length exceeding 1 ms, and short TTIs (e.g., shortened TTIs, etc.) may be interpreted as TTIs with a TTI length less than that of a long TTI but 1 ms or more.

[0174] A Resource Block (RB) is a resource allocation unit in the time domain and frequency domain, and in the frequency domain, it may contain one or more consecutive subcarriers. The number of subcarriers in an RB may be the same regardless of the neurology, for example, 12. The number of subcarriers in an RB may be determined based on the neurology.

[0175] Furthermore, an RB may contain one or more symbols in the time domain and may have the length of one slot, one minislot, one subframe, or one TTI. One TTI, one subframe, etc., may each consist of one or more resource blocks.

[0176] One or more RBs may also be called Physical RBs (PRBs), Sub-Carrier Groups (SCGs), Resource Element Groups (REGs), PRB pairs, RB pairs, etc.

[0177] Furthermore, a resource block may consist of one or more resource elements (REs). For example, one RE may be a radio resource area comprising one subcarrier and one symbol.

[0178] A Bandwidth Part (BWP), also known as a partial bandwidth, may represent a subset of consecutive common resource blocks (RBs) for a given neurology in a given carrier. These common RBs may be identified by an index of the RBs relative to a common reference point of the carrier. The PRBs may be defined and numbered within a given BWP.

[0179] A BWP may include UL BWP (BWP for UL) and DL BWP (BWP for DL). One or more BWPs may be configured within a single carrier for a UE.

[0180] At least one of the configured BWPs may be active, and the UE does not need to assume that it will transmit or receive a predetermined signal / channel outside of the active BWP. In this disclosure, terms such as "cell" and "carrier" may be read as "BWP".

[0181] The structures of wireless frames, subframes, slots, minislots, and symbols described above are merely examples. For example, the number of subframes included in a wireless frame, the number of slots per subframe or wireless frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, and the number of symbols, symbol length, and cyclic prefix (CP) length within the TTI can be varied in various ways.

[0182] Furthermore, the information, parameters, etc., described in this disclosure may be expressed using absolute values, relative values ​​from a predetermined value, or corresponding other information. For example, wireless resources may be indicated by a predetermined index.

[0183] The names used for parameters and other elements in this disclosure are not restrictive in any way. Furthermore, mathematical formulas and other elements using these parameters may differ from those expressly disclosed in this disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, and therefore, the various names assigned to these various channels and information elements are not restrictive in any way.

[0184] The information, signals, etc. described in this disclosure may be represented using any of the various different techniques. For example, the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0185] Furthermore, information, signals, etc., can be output from upper layers to lower layers and from lower layers to upper layers, or to at least one of the two. Information, signals, etc., may also be input and output via multiple network nodes.

[0186] Input and output information and signals may be stored in a specific location (e.g., memory) or managed using a management table. Input and output information and signals may be overwritten, updated, or appended to. Output information and signals may be deleted. Input information and signals may be transmitted to other devices.

[0187] Any information described in this disclosure (e.g., variables, constants, parameters) may be communicated from any first device (e.g., UE / base station) to any second device (e.g., base station / UE) that indicates / specifies (or relates to) the value of such any information, even if not specifically stated in the embodiments described above.

[0188] Information notification is not limited to the embodiments described herein and may be carried out by other means. For example, information notification in this disclosure may be carried out by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB)), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0189] Physical layer signaling may also be called Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signals), L1 control information (L1 control signals), etc. RRC signaling may also be called RRC messages, for example, RRC Connection Setup messages, RRC Connection Reconfiguration messages, etc. MAC signaling may also be communicated using, for example, MAC Control Elements (CEs).

[0190] Furthermore, notification of the specified information (for example, notification that "X is the case") is not limited to explicit notification, but may also be made implicitly (for example, by not notifying the specified information or by notifying other information).

[0191] The determination may be made by a value represented by one bit (0 or 1), by a boolean value represented as true or false, or by a numerical comparison (for example, a comparison with a predetermined value).

[0192] Software should be broadly interpreted to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, and so on, whether they are called software, firmware, middleware, microcode, hardware description languages, or by any other name.

[0193] Furthermore, software, instructions, information, etc., may be transmitted and received via a transmission medium. For example, if software is transmitted from a website, server, or other remote source using at least one of wired technology (such as coaxial cable, fiber optic cable, twisted pair, or Digital Subscriber Line (DSL)) and wireless technology (such as infrared or microwave), then at least one of these wired and wireless technologies is included in the definition of a transmission medium.

[0194] The terms “system” and “network” as used in this disclosure may be used interchangeably. “Network” may also mean the equipment included in the network (e.g., base stations).

[0195] In this disclosure, terms such as “precoding,” “precoder,” “weight (precoding weight),” “quasi-co-location (QCL),” “transmission configuration indication state (TCI state),” “spatial relation,” “spatial domain filter,” “transmit power,” “phase rotation,” “antenna port,” “port,” “layer,” “number of layers,” “rank,” “resource,” “resource set,” “beam,” “beam width,” “beam angle,” “antenna,” “antenna element,” “panel,” “UE panel,” “transmitting entity,” and “receiving entity” may be used interchangeably.

[0196] In this disclosure, "antenna port" may be interpreted interchangeably with "antenna port for any signal / channel" (e.g., a Demodulation Reference Signal (DMRS) port). In this disclosure, "resource" may be interpreted interchangeably with "resource for any signal / channel" (e.g., a reference signal resource, an SRS resource, etc.). Resources may include time / frequency / code / spatial / power resources. Furthermore, a spatial domain transmit filter may include at least one of a spatial domain transmit filter and a spatial domain receive filter.

[0197] The above group may include, for example, at least one of the following: a spatial relationship group, a code division multiplexing (CDM) group, a reference signal (RS) group, a control resource set (CORESET) group, a PUCCH group, an antenna port group (e.g., a DMRS port group), a layer group, a resource group, a beam group, an antenna group, or a panel group.

[0198] Furthermore, in this disclosure, terms such as beam, SRS Resource Indicator (SRI), CORESET, CORESET pool, PDSCH, PUSCH, Codeword (CW), Transport Block (TB), and RS may be interpreted interchangeably.

[0199] Furthermore, in this disclosure, TCI state, downlink TCI state (DL TCI state), uplink TCI state (UL TCI state), unified TCI state, common TCI state, joint TCI state, etc., may be interpreted interchangeably.

[0200] Furthermore, in this disclosure, terms such as "QCL," "QCL assumption," "QCL relationship," "QCL type information," "QCL property / properties," "specific QCL type (e.g., Type A, Type D) properties," and "specific QCL type (e.g., Type A, Type D)" may be interpreted interchangeably.

[0201] In this disclosure, terms such as index, identifier (ID), indicator, indication, and resource ID may be interpreted interchangeably. In this disclosure, terms such as sequence, list, set, group, cluster, subset may be interpreted interchangeably.

[0202] Furthermore, the spatial relationship information Identifier (ID) (TCI state ID) and spatial relationship information (TCI state) may be interpreted as mutually exclusive. "Spatial relationship information (TCI state)" may be interpreted as mutually exclusive as "a set of spatial relationship information (TCI state)," "one or more pieces of spatial relationship information," etc. TCI state and TCI may be interpreted as mutually exclusive. Spatial relationship information and spatial relationship may be interpreted as mutually exclusive.

[0203] In this disclosure, terms such as “Base Station (BS),” “wireless base station,” “fixed station,” “NodeB,” “eNB (eNodeB),” “gNB (gNodeB),” “access point,” “Transmission Point (TP),” “Reception Point (RP),” “Transmission / Reception Point (TRP),” “panel,” “cell,” “sector,” “cell group,” “carrier,” and “component carrier” may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.

[0204] A base station may house one or more (e.g., three) cells. If a base station houses multiple cells, the entire coverage area of ​​the base station may be divided into several smaller areas, each of which may also be provided with communication services by a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). The terms “cell” or “sector” refer to part or all of the coverage area of ​​at least one of the base station and / or base station subsystems that provide communication services in that coverage.

[0205] In this disclosure, the transmission of information by a base station to a terminal may be interpreted as the base station instructing the terminal to perform a control / operation based on said information.

[0206] In this disclosure, terms such as "Mobile Station (MS)," "user terminal," "User Equipment (UE)," and "terminal" may be used interchangeably.

[0207] A mobile station may also be called a 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 term.

[0208] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, etc. At least one of the base station and the mobile station may also be a device mounted on a moving object, the moving object itself, etc.

[0209] The term "mobile object" refers to any movable object, regardless of its speed, and naturally includes cases where the mobile object is stationary. Examples of such mobile objects include, but are not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcarts, rickshaws, ships and other watercraft, airplanes, rockets, satellites, drones, multicopters, quadcopters, balloons, and items carried on them. Furthermore, such mobile objects may be autonomously driven objects operating based on operational commands.

[0210] The mobile entity may be a vehicle (e.g., a car, an airplane), an unmanned mobile entity (e.g., a drone, an autonomous vehicle), or a robot (manned or unmanned). At least one of the base station and the mobile station may be 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 Internet of Things (IoT) device such as a sensor.

[0211] Figure 13 shows an example of a vehicle according to one embodiment. The vehicle 40 includes a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, an axle 48, an electronic control unit 49, various sensors (including a current sensor 50, a rotation speed sensor 51, a pneumatic pressure sensor 52, a vehicle speed sensor 53, an acceleration sensor 54, an accelerator pedal sensor 55, a brake pedal sensor 56, a shift lever sensor 57, and an object detection sensor 58), an information service unit 59, and a communication module 60.

[0212] The drive unit 41 consists of, for example, at least one of an engine, a motor, or an engine-motor hybrid. The steering unit 42 includes at least a steering wheel (also called a handle) and is configured to steer at least one of the front wheels 46 and the rear wheels 47 based on the operation of the steering wheel operated by the user.

[0213] The electronic control unit 49 consists of a microprocessor 61, memory (ROM, RAM) 62, and communication ports (e.g., input / output (IO) ports) 63. Signals from various sensors 50-58 installed in the vehicle are input to the electronic control unit 49. The electronic control unit 49 may also be called an Electronic Control Unit (ECU).

[0214] Signals from various sensors 50-58 include current signals from current sensor 50 for sensing motor current, rotational speed signals of front wheels 46 / rear wheels 47 acquired by rotational speed sensor 51, air pressure signals of front wheels 46 / rear wheels 47 acquired by air pressure sensor 52, vehicle speed signals acquired by vehicle speed sensor 53, acceleration signals acquired by acceleration sensor 54, accelerator pedal depression amount signals acquired by accelerator pedal sensor 55, brake pedal depression amount signals acquired by brake pedal sensor 56, operation signals of shift lever 45 acquired by shift lever sensor 57, and detection signals acquired by object detection sensor 58 for detecting obstacles, vehicles, pedestrians, etc.

[0215] The information service unit 59 consists of various devices for providing (outputting) various types of information such as driving information, traffic information, and entertainment information, including a car navigation system, audio system, speakers, display, television, and radio, and one or more ECUs that control these devices. The information service unit 59 uses information acquired from external devices via a communication module 60 or the like to provide various types of information / services (for example, multimedia information / multimedia services) to the occupants of the vehicle 40.

[0216] The information service unit 59 may include input devices that accept input from the outside (e.g., keyboard, mouse, microphone, switch, button, sensor, touch panel, etc.) or output devices that perform output to the outside (e.g., display, speaker, LED lamp, touch panel, etc.).

[0217] The driver assistance system unit 64 consists of various devices that provide functions to prevent accidents or reduce the driver's workload, such as millimeter-wave radar, Light Detection and Ranging (LiDAR), cameras, positioning locators (e.g., Global Navigation Satellite System (GNSS)), map information (e.g., High Definition (HD) maps, Autonomous Vehicle (AV) maps), gyro systems (e.g., Inertial Measurement Unit (IMU), Inertial Navigation System (INS)), artificial intelligence (AI) chips, and AI processors, as well as one or more ECUs that control these devices. The driver assistance system unit 64 also transmits and receives various information via the communication module 60 to realize driver assistance functions or autonomous driving functions.

[0218] The communication module 60 can communicate with the microprocessor 61 and components of the vehicle 40 via the communication port 63. For example, the communication module 60 sends and receives data (information) via the communication port 63 to the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axle 48, the microprocessor 61 and memory (ROM, RAM) 62 in the electronic control unit 49, and various sensors 50-58 provided in the vehicle 40.

[0219] The communication module 60 is a communication device that can be controlled by the microprocessor 61 of the electronic control unit 49 and can communicate with external devices. For example, it can send and receive various types of information to and from external devices via wireless communication. The communication module 60 may be located either inside or outside the electronic control unit 49. The external device may be, for example, the base station 10 or the user terminal 20 described above. Alternatively, the communication module 60 may be, for example, at least one of the base station 10 and the user terminal 20 (it may function as at least one of the base station 10 and the user terminal 20).

[0220] The communication module 60 may transmit at least one of the following to an external device via wireless communication: signals from the various sensors 50-58 input to the electronic control unit 49, information obtained based on said signals, and information based on input from an external source (user) obtained via the information service unit 59. The electronic control unit 49, the various sensors 50-58, the information service unit 59, etc., may also be called input units that accept input. For example, the PUSCH transmitted by the communication module 60 may include the information based on the above input.

[0221] The communication module 60 receives various information (traffic information, signal information, inter-vehicle information, etc.) transmitted from an external device and displays it on the information service unit 59 installed in the vehicle. The information service unit 59 may also be called an output unit, which outputs information (for example, it outputs information to devices such as displays and speakers based on the PDSCH (or data / information decoded from the PDSCH) received by the communication module 60).

[0222] Furthermore, the communication module 60 stores various information received from external devices in a memory 62 that can be used by the microprocessor 61. Based on the information stored in the memory 62, the microprocessor 61 may control the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axle 48, various sensors 50-58, etc., which are provided in the vehicle 40.

[0223] Furthermore, the term "base station" in this disclosure may be interpreted as "user terminal." For example, the various aspects / embodiments of this disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple user terminals (which may be called, for example, Device-to-Device (D2D), Vehicle-to-Everything (V2X)). In this case, the user terminal 20 may have the functions of the base station 10 described above. Also, terms such as "uplink" and "downlink" may be interpreted as terms corresponding to terminal-to-terminal communication (for example, "sidelink"). For example, uplink channel, downlink channel, etc., may be interpreted as sidelink channel.

[0224] Similarly, the term "user terminal" in this disclosure may be replaced with "base station." In this case, the base station 10 may be configured to have the same functions as the user terminal 20 described above.

[0225] In this disclosure, operations performed by a base station may, in some cases, be performed by its upper node. In a network including one or more network nodes having base stations, it is clear that various operations performed for communication with terminals may be performed by the base station, one or more network nodes other than the base station (for example, a Mobility Management Entity (MME), a Serving Gateway (S-GW), etc., but not limited to these), or a combination thereof.

[0226] Each aspect / embodiment described in this disclosure may be used individually, in combination, or switched between as needed during execution. Furthermore, the processing procedures, sequences, flowcharts, etc., of each aspect / embodiment described in this disclosure may be rearranged in order, provided they are consistent. For example, the methods described in this disclosure present various step elements using exemplary order and are not limited to the specific order presented.

[0227] Each aspect / embodiment described in this disclosure is Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG (where x is, for example, an integer or decimal)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM®), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi®), IEEE 802.16 (WiMAX®), IEEE 802.20, systems utilizing Ultra-WideBand (UWB), Bluetooth®, or other appropriate wireless communication methods, and next-generation systems extended, modified, created, or defined based thereon may also be applied. Furthermore, multiple systems may be applied in combination (for example, a combination of LTE or LTE-A and 5G).

[0228] In this disclosure, the phrase "based on" does not mean "based solely on" unless otherwise specified. In other words, the phrase "based on" means both "based solely on" and "based at least on."

[0229] Any reference to elements using the designations “first,” “second,” etc., as used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient way to distinguish between two or more elements. Accordingly, the references to the first and second elements do not imply that only two elements may be employed or that the first element must precede the second element in any way.

[0230] The term “determining” as used in this disclosure may encompass a wide variety of actions. For example, “determining” may be considered to mean judging, calculating, computing, processing, deriving, investigating, looking up, searching, or inquiring (e.g., searching in tables, databases, or other data structures), ascertaining, etc.

[0231] Furthermore, "judgment (decision)" may be considered as "judging (deciding)" things like receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory).

[0232] Furthermore, “judgment (decision)” may be considered as “judgment (decision)” of resolving, selecting, choosing, establishing, comparing, etc. In other words, “judgment (decision)” may be considered as “judgment (decision)” of some action. In this disclosure, “judgment (decision)” may be interpreted as mutually interchangeable with the actions described above.

[0233] Furthermore, in this disclosure, “determine / determining” may be interpreted as “assume / assuming,” “expect / expecting,” or “consider / considering.” In addition, in this disclosure, “not expecting to do…” may be interpreted as “expecting not to do….”

[0234] In this disclosure, "expect" may be rephrased as "be expected." For example, "expect(s) ..." (where "..." may be expressed as a that clause, an infinitive, etc.) may be rephrased as "be expected ..." or "do (the verb without "to" if "..." is an infinitive)." Similarly, "does not expect ..." may be rephrased as "be not expected ..." or "do not (the verb without "to" if "..." is an infinitive)." Furthermore, "An apparatus A is not expected ..." may be rephrased as "An apparatus B other than apparatus A does not expect ... from apparatus A" (for example, if apparatus A is a UE, apparatus B may be a base station).

[0235] The term "maximum transmit power" as used in this disclosure may mean the maximum transmit power, the nominal UE maximum transmit power, or the rated UE maximum transmit power.

[0236] As used in this disclosure, the terms “connected,” “coupled,” and any variations thereof mean any direct or indirect connection or coupling between two or more elements, and may include one or more intermediate elements between two elements that are “connected” or “coupled” with each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, “connection” may be replaced with “access.”

[0237] In this disclosure, when two elements are connected, they can be considered to be "connected" or "coupled" to each other using one or more wires, cables, printed electrical connections, etc., and, in some non-exclusive and non-exclusive examples, electromagnetic energy having wavelengths in the radio frequency domain, microwave domain, and optical (both visible and invisible) domain.

[0238] In this disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "combine" may be interpreted similarly to "different."

[0239] Where the terms “include,” “including,” and variations thereof are used in this disclosure, these terms are intended to be inclusive, as is the term “comprising.” Furthermore, the term “or” as used in this disclosure is not intended to mean exclusive OR.

[0240] In this disclosure, if articles are added by translation, such as a, an, and the in English, this disclosure may include the fact that the noun following these articles is plural.

[0241] In this disclosure, "less than or equal to," "less than," "greater than or equal to," "more than," and "equal to" may be interpreted interchangeably. In addition, in this disclosure, words meaning "good," "bad," "big," "small," "high," "low," "early," "slow," "wide," and "narrow" may be interpreted interchangeably, not limited to the positive, comparative, and superlative degrees. In addition, in this disclosure, words meaning "good," "bad," "big," "small," "high," "low," "early," "slow," "wide," and "narrow" may be interpreted interchangeably, not limited to the positive, comparative, and superlative degrees, by adding "i-th" (where i is any integer) to the expression (for example, "highest" may be interpreted interchangeably with "i-th highest").

[0242] In this disclosure, "of," "for," "regarding," "related to," and "associated with" may be interpreted as being interchangeable.

[0243] In this disclosure, phrases such as "when A, B", "if A, then B", "B upon A", "B in response to A", "B based on A", "B during / while A", "B before A", "B at (the same time as) / on A", "B after A", "B since A", and "B until A" may be interchangeable. Furthermore, A, B, etc., may be replaced with appropriate expressions such as nouns, gerunds, or regular sentences depending on the context. The time difference between A and B may be approximately zero (immediately after or immediately before). Additionally, a time offset may be applied to the time when A occurs. For example, "A" may be interpreted as "before / after the time offset when A occurs". The time offset (e.g., one or more symbols / slots) may be predetermined or determined by the UE based on notified information.

[0244] In this disclosure, timing, time, duration, time instance, any unit of time (e.g., slot, subslot, symbol, subframe), period, occasion, resource, etc., may be interpreted interchangeably.

[0245] Although the invention described herein has been explained in detail above, it will be clear to those skilled in the art that the invention described herein is not limited to the embodiments described herein. The descriptions herein are illustrative and not intended to be restrictive in any way to the invention described herein.

[0246] This application is based on Japanese Patent Application No. 2025-055524, filed on March 28, 2025. All of its contents are included herein.

Claims

1. A first wireless access network node having: a transmitting unit that transmits a request to a second wireless access network node for monitoring the available bitrate on one or both of the downlink and / or uplink; and a control unit that controls the reception of the available bitrate report from the second wireless access network node.

2. The first wireless access network node according to claim 1, wherein the control unit calculates available bitrate information for quality of service (QoS) flow in the first wireless access network node and the second wireless access network node based on the available bitrate, and controls the transmission of the available bitrate information to the core network.

3. The first wireless access network node according to claim 1, wherein the first wireless access network node is a centralized unit (CU), and the second wireless access network node is a distributed unit (DU).

4. The first wireless access network node according to claim 1, wherein the first wireless access network node is a master node (MN), and the second wireless access network node is a secondary node (SN).

5. A communication method for a first radio access network node, comprising the steps of: transmitting a request to a second radio access network node for monitoring the available bitrate on one or both of the downlink and / or uplink; and controlling the reception of a report of the available bitrate from the second radio access network node.

6. A second wireless access network node having a receiving unit that receives a request from a first wireless access network node to monitor the available bitrate on one or both of the downlink and / or uplink, and a control unit that controls the transmission of a report of the available bitrate to the first wireless access network node.

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