Method and system for application layer measurement reporting by user equipment operating in dual connection mode

Abstract

A user equipment (UE) includes a transceiver and a processor configured to connect the UE to a primary node (MN) in a primary cell group (MCG) and a secondary node (SN) in a secondary cell group (SCG). The processor is configured to perform an application layer measurement for an application on the UE and generate an application layer measurement report. The processor is configured to transmit, via the transceiver, the application layer measurement report in one or more segments to at least one of the MN or the SN based on an application layer measurement configuration describing at least one cell group for transmitting the application layer measurement report to a network.

Description

Technical Field

[0001] The present application generally relates to wireless communication systems, including methods and systems for application layer measurement reporting using a separate signaling radio bearer 4 (SRB4). Background Art

[0002] Wireless mobile communication technologies use various standards and protocols to send data between base stations and wireless communication devices. Wireless communication system standards and protocols may include, for example, the 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) (e.g., 4G), 3GPP New Radio (NR) (e.g., 5G), and the IEEE 802.11 standard for wireless local area networks (WLANs) (commonly referred to within industry organizations as WLANs). ).

[0003] As envisioned by 3GPP, different wireless communication system standards and protocols may use various radio access networks (RANs) to communicate between base stations of the RAN (which may also sometimes be referred to as RAN nodes, network nodes, or simply nodes) and wireless communication devices referred to as user equipment (UE). 3GPP RANs may include, for example, Global System for Mobile Communications (GSM), Enhanced Data Rates for GSM Evolution (EDGE) RAN (GERAN), Universal Terrestrial Radio Access Network (UTRAN), Evolved Universal Terrestrial Radio Access Network (E-UTRAN), and / or Next Generation Radio Access Network (NG-RAN).

[0004] Each RAN may use one or more radio access technologies (RATs) to perform communications between base stations and UEs. For example, GERAN implements GSM and / or EDGE RAT, UTRAN implements Universal Mobile Telecommunications System (UMTS) RAT or other 3GPP RAT, E-UTRAN implements LTE RAT (sometimes referred to as LTE), and NG-RAN implements NR RAT (sometimes referred to as 5G RAT, 5G NR RAT, or NR in this document). In some deployments, E-UTRAN may also implement NR RAT. In some deployments, NG-RAN may also implement LTE RAT.

[0005] The base stations used by the RAN may correspond to the RAN. An example of an E-UTRAN base station is an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) Node B (also commonly denoted as an evolved Node B, enhanced Node B, eNodeB, or eNB). An example of an NG-RAN base station is a Next Generation Node B (sometimes also referred to as a gNodeB or gNB).

[0006] The RAN provides communication services together with external entities through its connection with the Core Network (CN). For example, E-UTRAN may utilize the Evolved Packet Core (EPC) and NG-RAN may utilize the 5G Core Network (5GC). BRIEF DESCRIPTION OF THE DRAWINGS

[0007] To easily identify the discussion of any particular element or action, the most significant digit(s) in a reference number refers to the drawing number that first introduces the element.

[0008] Figure 1 An example wireless communication system is shown in accordance with embodiments described herein.

[0009] Figure 2 An example SRB4 in dual connectivity mode is illustrated according to embodiments described herein.

[0010] Figure 3 An example flow diagram illustrating operations that may be performed by a UE according to the embodiments described herein.

[0011] Figure 4 Another example flow diagram illustrating operations that may be performed by a UE according to embodiments described herein.

[0012] Figure 5 An example flow diagram illustrating operations that may be performed by a base station according to embodiments described herein.

[0013] Figure 6 An example architecture of a wireless communication system according to the embodiments described herein is illustrated.

[0014] Figure 7 A system for performing signaling between a wireless device and a network device according to embodiments described herein is illustrated. DETAILED DESCRIPTION

[0015] In the present disclosure, various embodiments relate to systems and methods for sending application layer measurement reports or quality of experience (QoE) reports from a UE in dual connectivity (DC) mode (e.g., 5G NR-DC mode) to a network. Specifically, the application layer measurement report or QoE report may be assigned to one or more segments, and the one or more segments may be sent to the network via a master node (MN) in a master cell group (MCG) and / or a secondary node (SN) in a secondary cell group (SCG) using a radio bearer (e.g., signaling radio bearer 4 (SRB4)). As described herein, the network may also include a core network, such as a 5G core network, and the like.

[0016] In recent research by 3GPP, an application layer measurement reporting framework has been defined. The UE may be configured to perform application layer measurements corresponding to applications on the UE (e.g., applications executed on the UE). The UE may receive measurement reports from the applications and generate application layer measurement reports or QoE reports to report application layer measurements to the network. In the present disclosure, application layer measurements may also refer to QoE measurements, and vice versa, and application layer measurement reports may also refer to QoE reports, and vice versa. In addition, the QoE report may be visible to the RAN (e.g., visible to the base station) and may be referred to as a RAN visible QoE report herein. In some cases, the QoE report may not be visible to the RAN and may be referred to as a RAN invisible QoE report herein. The RAN visible QoE report may be used by the RAN for network optimization. Generally speaking, the QoE report may be used by the network for various purposes, including but not limited to optimizing the network and / or the RAN, collecting statistical information for analysis, and the like.

[0017] The NR-DC mode is an important deployment scenario for 5G networks, and support for application layer measurement (or QoE measurement) reporting for the NR QoE framework needs to be supported. In other words, support for QoE measurement configuration and QoE reporting on MN and SN for NR-DC scenarios needs to be supported. In addition, for NR-DC scenarios (for example, UEs are connected to MN and SN in MCG and SCG, respectively), support for mobility continuity, consistency of QoE reporting, and minimization of drive tests (MDT), etc., needs to be supported. In addition, support for QoE measurement reporting for mobility continuity scenarios may also need to be provided, especially for UEs moving at high speeds, such as QoE measurement reporting in high-speed trains, in the air, and so on.

[0018] The embodiments described herein provide, among other things, solutions for QoE measurement reporting using SRB4 in NR-DC scenarios, maintaining continuity of QoE measurement reporting on MN and SN, and / or in mobility scenarios in NR-DC scenarios.

[0019] A radio bearer (e.g., SRB4) may be used to transmit QoE reports to the network. SRB4 may be configured as defined in 3G TPP Technical Specification (TS) 38.331. Thus, in some embodiments, SRB4 may be used for radio resource control (RRC) messages that include QoE reporting information. SRB4 may use a dedicated control channel (DCCH) logical channel. As a non-limiting example, SRB4 may be configured by the network after access stratum (AS) security activation.

[0020] In some embodiments, SRB4 may be used to transmit a QoE report from a UE in NR-DC mode to the network. The QoE report may be based on a QoE measurement configuration, and / or the QoE report configuration may be transmitted to the MN and / or SN for transmission to the network.

[0021] Reference will now be made specifically to the representative embodiments / aspects illustrated in the accompanying drawings. The following description is not intended to limit the embodiments to a preferred embodiment. On the contrary, it is intended to cover alternatives, combinations, modifications and equivalents that may be included within the spirit and scope of the embodiments defined by the appended claims.

[0022] Figure 1 An example wireless communication system according to the embodiments described herein is shown. Figure 1 As shown, the wireless communication system 100 may include base stations 102 and 104, UE 106, and network 108. In some embodiments, base stations 102 and / or 104 may be eNBs, eNodeBs, gNodeBs, or access points (APs) in a RAN, and may support one or more radio access technologies, such as 4G, 5G, 5G New Radio (5G NR), etc. In addition, the RAN may be a terrestrial network (TN) or a non-terrestrial network (NTN). Therefore, base stations 102 and / or 104 may be located in an NTN and / or a TN. A base station in an NTN may be located on a satellite in an earth orbit, or may be located on a drone or an unmanned aerial vehicle (UAV). UE 106 may be a phone, a smart phone, a tablet, a smart watch, an Internet of Things (IoT), a vehicle, etc.

[0023] In some embodiments, UE 106 may be configured to perform application layer measurements (or QoE measurements) and report these application layer measurements (or QoE measurements) to network 108 using application layer measurement reports (or QoE reports). UE 106 may be in NR-DC mode with base stations 102 and 104. As a non-limiting example, base station 102 may be a MN in an MCG and base station 104 may be a SN in an SCG. According to embodiments as described herein, a UE in NR-DC mode may report QoE measurements to network 108 via the MN and / or SN. Although Figure 1 Only one SN is shown in the figure, but there may be more than one SN to which the UE can connect in multi-connectivity (MC) mode.

[0024] Figure 2An example SRB4 in dual connectivity mode according to embodiments described herein is illustrated. SRB4 200 for application layer measurement reporting (or QoE reporting) as defined in Rel-17 is shown as having different layers for a UE (such as UE 106) connected to a MN 202 (e.g., base station 102) and a SN 204 (e.g., base station 104) in DC mode (e.g., NR-DC mode). SRB4 200 of UE 106 may have a radio resource control (RRC) layer 206 and a packet data convergence protocol (PDCP) layer 208.

[0025] In some embodiments, the UE 106 in DC mode may be connected to both the MN and the SN at the same time, and thus a split bearer may be applied, wherein the PDCP layer 208 may be associated with two radio link control (RLC) entities 210a and 210b corresponding to the MN 202 and the SN 204, respectively. Thus, the RLC 210a and the RLC 210b may provide connectivity to the MN 202 in the MCG and the SN 204 in the SCG, respectively, via the MCG medium access controller (MAC) 212a and the SCG MAC 212b, respectively, and through a common physical (PHY) layer 214. The MN 202 and the SN 204 may have an Xn interface for communicating with each other.

[0026] Currently, the 3rd Generation Partnership Project (3GPP) Technical Specification (TS) 38.331 describes split SRBs in DC scenarios only for SRB1 and SRB2, but not for SRB0 and SRB3. Therefore, various embodiments in the present disclosure describe split SRBs for SRB4 for QoE measurement reporting via MN and / or SN in DC (e.g., NR-DC) scenarios.

[0027] Figure 3 An example flow chart of operations that may be performed by a UE according to embodiments described herein is illustrated. As shown in flow chart 300, at 302, a UE (e.g., UE 106) may be connected to a MN (e.g., MN 202) in an MCG and a SN (e.g., SN 204) in an SCG. In other words, the UE may be in a DC mode (e.g., NR-DC mode) with the MN and the SN.

[0028] At 304, the UE may perform at least one of an application layer measurement or a QoE measurement for an application on the UE, such as an application executed on the UE. The UE may perform the application layer measurement or the QoE measurement and collect data corresponding to the application layer of the UE for the application. At 306, the UE may generate at least one of an application layer measurement report or a QoE report. The application layer measurement report or the QoE report may be a RAN visible report or a RAN invisible report. The RAN invisible report may be a container-based report.

[0029] In 3GPP TS 38.300Rel-17, when an application layer measurement report or a QoE report is sent to a network, if the size of the application layer measurement report or the QoE report exceeds a predetermined or preconfigured threshold size (e.g., 9000 bytes) or the maximum size of a PDCP service data unit (SDU), the application layer measurement report or the QoE report may be optionally segmented into multiple segments according to the rrc-SegAllowed field of the application layer measurement configuration (AppLayerMeasConfig).

[0030] Thus, in some embodiments, based on the size of the application layer measurement report or QoE report, the application layer measurement report or QoE report may be sent to the network as a complete application layer measurement report or QoE report in one segment, or in more than one segment of the application layer measurement report or QoE report at 308. In the case of multiple segments, each of the multiple segments may carry different information of the application layer measurement report or QoE report.

[0031] In some embodiments, and as a non-limiting example, the application layer measurement report or QoE report may be divided into more than one segment even when the size of the application layer measurement report or QoE report does not exceed a predetermined or preconfigured threshold size or the maximum size of the PDCP SDU.

[0032] Therefore, the application layer measurement report or QoE report may be sent to the network via at least one of the MN or the SN in one or more segments of the application layer measurement report or the QoE report. Whether the application layer measurement report or the QoE report should be sent via the MN, via the SN, or via both the MN and the SN may be determined by the UE based on an application layer measurement configuration (e.g., AppLayerMeasConfig), which may describe at least one cell group (e.g., MCG and / or SCG) for sending the application layer measurement report or the QoE report to the network through different branches of the UE in DC mode.

[0033] In some embodiments, when the application layer measurement report or QoE report is segmented into more than one segment, the segments of the application layer measurement report or QoE report may be grouped into a first subset of the multiple segments of the application layer measurement report or QoE report and / or a second subset of the multiple segments of the application layer measurement report or QoE report. In the present disclosure, for simplicity, one or more segments of the first subset of the multiple segments of the application layer measurement report or QoE report may be referred to as one or more segments of the application layer measurement report or QoE report. Similarly, one or more segments of the second subset of the multiple segments of the application layer measurement report or QoE report may be referred to as one or more segments of the application layer measurement report or QoE report. The one or more segments of the application layer measurement report or QoE report may correspond to one or more segments of the first subset of the multiple segments of the application layer measurement report or QoE report and / or one or more segments of the second subset of the multiple segments of the application layer measurement report or QoE report.

[0034] In some embodiments, the UE may be configured using an information element (IE) of pdcp-config to submit one or more segments of a first subset of multiple segments of an application layer measurement report or a QoE report to a first RLC entity (e.g., RLC 210a or RLC 210b) at a PDCP layer (e.g., PDCP layer 208), and to submit one or more segments of a second subset of multiple segments of an application layer measurement report or a QoE report to a second RLC entity (e.g., RLC 210b or RLC210a) for transmission to the network via the MCG and the SCG (or the SCG and the MCG), respectively. Upon receiving at least one segment of the one or more segments of the subset (e.g., the first subset or the second subset) of the multiple segments of the application layer measurement report or the QoE report at the MN or the SN, the MN or the SN may transmit the at least one segment of the one or more segments of the subset (e.g., the first subset or the second subset) of the multiple segments of the application layer measurement report or the QoE report to the MN or the SN via an Xn interface (e.g., such as an SCG) between the MN and the SN. Figure 6 Interface 622) is shown to transmit the received segments to another node or base station.

[0035] In some embodiments, a new indication may be introduced in the Xn interface or the F1 interface to identify the identifier (ID) of the corresponding application layer measurement configuration (e.g., measConfigAppLayerId) and / or the ID of the first subset and / or second subset of multiple segments of the application layer measurement report or QoE report.

[0036] In some embodiments, the UE may receive an indication or instruction to suspend QoE reporting when, for example, the RAN is overloaded. The indication or instruction to suspend and / or resume QoE reporting may be received in the pauseReporting field of AppLayerMeasConfig. For a UE in DC mode, the UE may be instructed or directed to suspend and / or resume QoE reporting on one or more legs or via the MN and / or SN, based on, for example, the RAN load conditions associated with the MCG and / or SCG, etc.

[0037] In some embodiments, and as a non-limiting example, the UE may receive an indication to suspend sending application layer measurement reports or QoE reports to the network via the MCG and SCG (or alternatively, via the MN and SN), and the UE may thereby suspend sending application layer measurement reports or QoE reports or at least one segment of an application layer measurement report or QoE report to the network via the MCG (or alternatively, via the MN), and suspend sending application layer measurement reports or QoE reports or at least one segment of an application layer measurement report or QoE report to the network via the SCG (or alternatively, via the SN). Upon receiving an indication to resume sending application layer measurement reports or QoE reports to the network via MCG and SCG (or alternatively, via MN and SN), the UE may therefore resume sending application layer measurement reports or QoE reports or at least one segment of application layer measurement reports or QoE reports to the network via MCG (or alternatively, via MN), and resume sending application layer measurement reports or QoE reports or at least one segment of application layer measurement reports or QoE reports to the network via SCG (or alternatively, via SN).

[0038] In some embodiments, and as a non-limiting example, the UE may receive an indication to suspend sending an application layer measurement report or a QoE report to the network via the MN, and the UE may accordingly suspend sending an application layer measurement report or a QoE report, or at least one segment of an application layer measurement report or a QoE report, to the network via the MN. Instead, the UE may send an application layer measurement report or a QoE report, or at least one segment of an application layer measurement report or a QoE report to the network via the SN.

[0039] In some embodiments, and as a non-limiting example, the UE may receive an indication to resume sending application layer measurement reports or QoE reports to the network via the MCG (or alternatively, via the MN), and the UE may therefore resume sending application layer measurement reports or QoE reports, or at least one segment of application layer measurement reports or QoE reports, to the network via the MCG (or alternatively, via the MN). In some embodiments, and as a non-limiting example, upon receiving an indication to resume sending application layer measurement reports or QoE reports to the network via the MN, the UE may suspend sending application layer measurement reports or QoE reports, or at least one segment of application layer measurement reports or QoE reports to the network via the SCG (or alternatively, via the SN), and send application layer measurement reports or QoE reports, or at least one segment of application layer measurement reports or QoE reports to the network via the MCG (or alternatively, via the MN).

[0040] In some embodiments, and as a non-limiting example, the UE may receive an indication to suspend sending an application layer measurement report or QoE report to the network via the SCG (or alternatively, via the SN), and the UE may therefore suspend sending an application layer measurement report or QoE report, or at least one segment of an application layer measurement report or QoE report to the network via the SCG (or alternatively, via the SN). Instead, the UE may send an application layer measurement report or QoE report, or at least one segment of an application layer measurement report or QoE report to the network via the MCG (or alternatively, via the MN).

[0041] In some embodiments, upon receiving an indication to resume sending an application layer measurement report or QoE report to the network via the SCG (or alternatively, via the SN), the UE may resume sending an application layer measurement report or QoE report, or at least one segment of an application layer measurement report or QoE report to the network via the SCG (or alternatively, via the SN). In some embodiments, and as a non-limiting example, upon receiving an indication to resume sending an application layer measurement report or QoE report to the network via the SCG (or alternatively, via the SN), the UE may suspend sending an application layer measurement report or QoE report, or at least one segment of an application layer measurement report or QoE report to the network via the MCG (or alternatively, via the MN), and send an application layer measurement report or QoE report, or at least one segment of an application layer measurement report or QoE report to the network via the SCG (or alternatively, via the SN).

[0042] In some embodiments, an indication to suspend and / or resume transmission via the MN and / or SN may be received by the UE from the MN and / or SN in an RRC signaling message or a MAC control element (MAC CE). As a non-limiting example, a two-bit bitmap may be used to indicate whether to suspend and / or resume transmission via the MN and SN. For example, a bitmap of "00" may indicate that transmission via the MN and SN is suspended, a bitmap of "01" may indicate that transmission via the MN is suspended but transmission via the SN is resumed / continued, a bitmap of "10" may indicate that transmission via the MN is resumed / continued but transmission via the SN is suspended, and a bitmap of "11" may indicate that transmission via the MN and SN is resumed / continued.

[0043] In some embodiments, the UE may be configured to ignore the indication when receiving an indication to suspend and / or resume transmission from the SN based on an instruction received from the MN, or to ignore the indication when receiving an indication to suspend and / or resume transmission from the MN based on an instruction received from the SN. In some embodiments, as non-limiting examples, the UE may prioritize the indication when receiving an indication to suspend and / or resume transmission from the MN or SN based on one or more of an identification of an application layer measurement or a QoE measurement, a type of application layer measurement or a QoE measurement, a geographic location of the UE, a channel quality of a link between the UE and the MN, a channel quality of a link between the UE and the SN, or a network slice associated with the received first indication or the received second indication.

[0044] In some embodiments, the indication to suspend and / or resume transmission via the MN and / or SN may apply only to RAN visible QoE reports or RAN invisible QoE reports or both.

[0045] In some embodiments, QoE reporting via MN and SN may be independently controlled by MN and SN. Thus, when the UE receives a suspend indication only from a MN in an MCG, the UE may suspend QoE reporting to the MN, and when the UE receives a suspend indication only from a SN in an SCG, the UE may suspend QoE reporting to the SN. Similarly, when the UE receives a resume indication only from a MN in an MCG, the UE may resume QoE reporting to the MN, and when the UE receives a resume indication only from a SN in an SCG, the UE may resume QoE reporting to the SN.

[0046] In some embodiments, and as a non-limiting example, an indication to suspend and / or resume transmission via the MN may be received via the SN in the SCG, and / or an indication to suspend and / or resume transmission via the SN may be received via the MN in the MCG.

[0047] As described herein, according to some embodiments, multiple segments of an application layer measurement report or a QoE report are sent to a network via a transmission path that may include an MN and / or an SN. Upon the occurrence of a specific event, the UE may be directed to change (or switch) the transmission path used for the QoE report. In other words, if the transmission path includes only the MN, the UE may be directed to change the transmission path to include only the SN. Similarly, if the transmission path includes only the SN, the UE may be directed to change the transmission path to include only the MN.

[0048] In some embodiments, and as a non-limiting example, the UE may be directed to replicate at least one segment of an application layer measurement report or a QoE report and send it via both the MN and the SN for redundancy purposes. As a non-limiting example, instructions corresponding to whether the UE needs to replicate each segment or stop replicating each segment may be dynamically provided to the UE and / or updated for the UE.

[0049] In some embodiments, specific events associated with an instruction to a UE to change the sending path for QoE reports may involve (including but not limited to) UE mobility level, UE battery level, UE geographic location, channel quality of the link between the UE and MN, channel quality of the link between the UE and SN, identification of application layer measurement or QoE measurement, type of application layer measurement or QoE measurement, network slice associated with application layer measurement or QoE measurement, size of application layer measurement report or QoE measurement report, number of radio link failures in an MCG or SCG, activation or deactivation of cells in an MCG or SCG, and / or the total number of activated cells in an MCG or SCG.

[0050] In some embodiments, the channel quality of the links between the UE and the MN and between the UE and the SN may be determined based on measurement metrics such as reference signal received power (RSRP), reference signal received quality (RSRQ), signal to interference plus noise ratio (SINR), and / or channel quality information (CQI). As a non-limiting example, the channel quality of the links between the UE and the MN and between the UE and the SN may be determined based on the number of radio link failures.

[0051] As described herein, according to some embodiments, a UE in DC mode may be configured to send a QoE report via a MN terminated bearer or a SN terminated bearer. In other words, the QoE report may be sent via the MN or the SN, and therefore the segments received at the MN may need to be transmitted to the SN, and vice versa. The segments may be sent by the UE in a container of ULInformationTransferMRDC, as specified in 3GPP TS 38.331. The transmission of the segments of the QoE report may be performed in accordance with clause 10.10 of 3GPP TS 37.340. As a non-limiting example, the UE may determine whether the QoE report should be sent via the MN (or MCG) or the SN (or SCG) based on an application layer measurement configuration (e.g., AppLayerMeasConfig) as received from the MN and / or the SN. Upon transmitting a request to the MN to transmit the AppLayerMeasConfig to the UE and receiving approval from the MN, the SN may transmit the AppLayerMeasConfig to the UE. AppLayerMeasConfig may indicate the cell group for QoE reporting based on one or more of a protocol data unit (PDU) session ID list for QoE reporting (eg, pdu-SessionIdList in MeasurementReportAppLayer) or visibility of the QoE report to the RAN.

[0052] Figure 4 Another example flow chart illustrating operations that may be performed by a UE according to embodiments described herein. As shown in flow chart 400, at 402, a UE (e.g., UE 106) may be connected to a MN (e.g., MN 202) in an MCG and at least one SN (e.g., SN 204) in an SCG in a multi-connectivity (MC) mode.

[0053] At 404, the UE may perform at least one of application layer measurements or QoE measurements for an application on the UE, such as an application executed on the UE. The UE may perform the application layer measurements or QoE measurements and collect data corresponding to the application layer of the UE for the application. At 406, the UE may generate at least one of an application layer measurement report or a QoE report. According to some embodiments, the application layer measurement report or the QoE report may be a RAN visible or RAN invisible report, as described herein.

[0054] As described herein, according to some embodiments, in 3GPP TS 38.300Rel-17, when an application layer measurement report or a QoE report is sent to a network, if the size of the application layer measurement report or the QoE report exceeds a predetermined or preconfigured threshold size (e.g., 9000 bytes) or the maximum size of a PDCP service data unit (SDU), the application layer measurement report or the QoE report may be segmented into multiple segments according to the rrc-SegAllowed field of the application layer measurement configuration (AppLayerMeasConfig). As a non-limiting example, the application layer measurement report or the QoE measurement report may be segmented based on the size of the application layer measurement report or the QoE report or an information element used to set a configurable packet data convergence protocol (PDCP) parameter for a signaling radio bearer (SRB) and / or a data radio bearer (DRB).

[0055] In some embodiments, the application layer measurement report or QoE report may be divided into at least a first subset of the plurality of segments and a second subset of the plurality of segments at 408. As a non-limiting example, the application layer measurement report or QoE report may be divided into the first subset and the second subset of the plurality of segments even when the size of the application layer measurement report or QoE report does not exceed a predetermined or preconfigured threshold size or a maximum size of a PDCP SDU.

[0056] Thus, at 410, an application layer measurement report or a QoE report may be transmitted to the network via sending one or more segments of a first subset of the plurality of segments to the MN (in the MCG) using SRB4, and sending one or more segments of a second subset of the plurality of segments to at least one SN (in the SCG) using SRB4. Thus, for a UE in MC mode, an application layer measurement report or a QoE report may be sent through different branches.

[0057] Figure 5 An example flow chart of operations that may be performed by a base station according to the embodiments described herein is illustrated. As shown in flow chart 500, at 502, a base station (e.g., base station 102) may be connected to a second base station (e.g., base station 104) and a UE (e.g., UE 106) via an Xn interface. The UE may also be connected to the second base station, and thus the UE may be in DC mode. In addition, the base station may be a MN in an MCG, or a SN in an SCG.

[0058] At 504, the base station may send an application layer measurement configuration (e.g., AppLayerMeasConfig) that describes at least one cell group for sending an application layer measurement report or a QoE report to the network. Since AppLayerMeasConfig is described in detail herein according to various embodiments, these details are not repeated for the sake of brevity.

[0059] At 506, according to the AppLayerMeasConfig sent to the UE, the base station may receive the application layer measurement report or QoE report in one segment or multiple segments according to various embodiments described herein. In addition, based on the type of bearer associated with SRB4, one segment or multiple segments of the application layer measurement report or QoE report may be sent by the base station to the second base station via the Xn interface, or may be received from the second base station via the Xn interface or the UE.

[0060] Embodiments contemplated herein include an apparatus having means for performing one or more elements of method 300, 400, or 500. In the context of method 300 or 400, the apparatus may be, for example, an apparatus of a UE (such as wireless device 702 as a UE, as described herein). In the context of method 500, the apparatus may be, for example, an apparatus of a base station (such as network device 720 as a base station, as described herein).

[0061] Therefore, various embodiments described in the present disclosure provide potential enhancements and / or solutions for QoE reporting using SRB4 for UEs in DC mode (e.g., NR-DC mode, multi-RAT DC (MR-DC) mode, etc.) and / or MC mode.

[0062] Embodiments contemplated herein include one or more non-transitory computer-readable media storing instructions that, when executed by one or more processors of an electronic device, cause the electronic device to perform one or more elements of methods 300, 400, or 500. In the context of methods 300 or 400, the non-transitory computer-readable medium may be, for example, a memory of a UE (such as memory 706 of wireless device 702 as a UE, as described herein). In the context of method 500, the non-transitory computer-readable medium may be, for example, a memory of a base station (such as memory 724 of network device 720 as a base station, as described herein).

[0063] Embodiments contemplated herein include an apparatus having logic, modules, or circuitry for performing one or more elements of methods 300, 400, or 500. In the context of methods 300 or 400, the apparatus may be, for example, an apparatus of a UE (such as wireless device 702 as a UE, as described herein). In the context of method 500, the apparatus may be, for example, an apparatus of a base station (such as network device 720 as a base station, as described herein).

[0064] Embodiments contemplated herein include an apparatus having one or more processors and one or more computer-readable media using or storing instructions that, when executed by the one or more processors, cause the one or more processors to perform one or more elements of methods 300, 400, or 500. In the context of methods 300 or 400, the apparatus may be, for example, an apparatus of a UE (such as wireless device 702 as a UE, as described herein). In the context of method 500, the apparatus may be, for example, an apparatus of a base station (such as network device 720 as a base station, as described herein).

[0065] Embodiments contemplated herein include a signal as described in or associated with one or more elements of methods 300 , 400 , or 500 .

[0066] Embodiments contemplated herein include a computer program or computer program product having instructions, wherein when the program is executed by a processor, causes the processor to perform one or more elements of the method 300, 400, or 500. In the context of the method 300 or 400, the processor may be a processor of a UE (such as the processor 704 of the wireless device 702 as a UE, as described herein), and the instructions may be located, for example, in the processor and / or on a memory of the UE (such as the memory 706 of the wireless device 702 as a UE, as described herein). In the context of the method 500, the processor may be a processor of a base station (such as the processor 722 of the network device 720 as a base station, as described herein), and the instructions may be located, for example, in the processor and / or on a memory of the base station (such as the memory 724 of the network device 720 as a base station, as described herein).

[0067] Figure 6 An example architecture of a wireless communication system according to the embodiments described herein is illustrated. The description provided below is for an example wireless communication system 600 operating in conjunction with the LTE system standard and / or the 5G or NR system standard as provided by the 3GPP technical specifications.

[0068] like Figure 6As shown, wireless communication system 600 includes UE 602 and UE 604 (although any number of UEs may be used). In this example, UE 602 and UE 604 are shown as smartphones (e.g., handheld touch screen mobile computing devices capable of connecting to one or more cellular networks), but may also include any mobile or non-mobile computing device configured for wireless communication.

[0069] UE 602 and UE 604 may be configured to be communicatively coupled to RAN 606. In an embodiment, RAN 606 may be NG-RAN, E-UTRAN, etc. UE 602 and UE 604 utilize connections (or channels) (shown as connection 608 and connection 610, respectively) with RAN 606, where each connection (or channel) includes a physical communication interface. RAN 606 may include one or more base stations, such as base station 612 and base station 614, to implement connection 608 and connection 610.

[0070] In this example, connection 608 and connection 610 are air interfaces that enable such communicative coupling and may conform to the RAT used by RAN 606, such as, for example, LTE and / or NR.

[0071] In some embodiments, UE 602 and UE 604 may also directly exchange communication data via side link interface 616. UE 604 is shown as being configured to access an access point (shown as AP 618) via connection 620. For example, connection 620 may include a local wireless connection, such as any connection conforming to the IEEE 802.11 protocol, wherein AP 618 may include In this example, AP 618 may not be connected to another network (eg, the Internet) through CN 624.

[0072] In an embodiment, UE 602 and UE 604 may be configured to communicate with each other or with base station 612 and / or base station 614 over a multi-carrier communication channel using orthogonal frequency division multiplexing (OFDM) communication signals according to various communication techniques, such as, but not limited to, orthogonal frequency division multiple access (OFDMA) communication techniques (e.g., for downlink communication) or single carrier frequency division multiple access (SC-FDMA) communication techniques (e.g., for uplink and ProSe or sidelink communication), although the scope of the embodiment is not limited in this respect. The OFDM signal may include multiple orthogonal subcarriers.

[0073] In some embodiments, all or part of the base station 612 or the base station 614 may be implemented as one or more software entities running on a server computer as part of a virtual network. In addition, or in other embodiments, the base station 612 or the base station 614 may be configured to communicate with each other via the interface 622. In an embodiment where the wireless communication system 600 is an LTE system (e.g., when the CN 624 is an EPC), the interface 622 may be an X2 interface. The X2 interface may be defined between two or more base stations (e.g., two or more eNBs, etc.) connected to the EPC and / or between two eNBs connected to the EPC. In an embodiment where the wireless communication system 600 is an NR system (e.g., when the CN 624 is a 5GC), the interface 622 may be an Xn interface. The Xn interface is defined between two or more base stations (e.g., two or more gNBs, etc.) connected to the 5GC, between the base station 612 (e.g., gNB) and the eNB connected to the 5GC, and / or between two eNBs connected to the 5GC (e.g., CN 624).

[0074] RAN 606 is shown communicatively coupled to CN 624. CN 624 may include one or more network elements 626 configured to provide various data and telecommunication services to customers / subscribers (e.g., UE 602 and users of UE 604) connected to CN 624 via RAN 606. The components of CN 624 may be implemented in one physical device or separate physical devices including components for reading and executing instructions from a machine-readable or computer-readable medium (e.g., a non-transitory machine-readable storage medium).

[0075] In an embodiment, CN 624 may be an EPC, and RAN 606 may be connected to CN 624 via an S1 interface 628. In an embodiment, S1 interface 628 may be divided into two parts: an S1 user plane (S1-U) interface, which carries traffic data between base station 612 or base station 614 and a serving gateway (S-GW); and an S1-MME interface, which is a signaling interface between base station 612 or base station 614 and a mobility management entity (MME).

[0076] In an embodiment, CN 624 may be a 5GC, and RAN 606 may be connected to CN 624 via an NG interface 628. In an embodiment, NG interface 628 may be divided into two parts: an NG user plane (NG-U) interface, which carries traffic data between base station 612 or base station 614 and a user plane function (UPF); and an S1 control plane (NG-C) interface, which is a signaling interface between base station 612 or base station 614 and an access and mobility management function (AMF).

[0077] Generally speaking, the application server 630 can be an element that provides applications (e.g., packet-switched data services) using Internet Protocol (IP) bearer resources using the CN 624. The application server 630 can also be configured to support one or more communication services (e.g., VoIP sessions, group communication sessions, etc.) for the UE 602 and the UE 604 via the CN 624. The application server 630 can communicate with the CN 624 via the IP communication interface 632.

[0078] Figure 7 A system 700 for performing signaling 738 between a wireless device 702 and a network device 720 according to embodiments described herein is illustrated. The system 700 may be part of a wireless communication system as described herein. The wireless device 702 may be, for example, a UE of a wireless communication system. The network device 720 may be, for example, a base station (e.g., an eNB or a gNB) of a wireless communication system.

[0079] The wireless device 702 may include one or more processors 704. The processor 704 may execute instructions to perform various operations as described herein for the wireless device 702. The processor 704 may include one or more baseband processors implemented using, for example, a central processing unit (CPU), a digital signal processor (DSP), an application specific integrated circuit (ASIC), a controller, a field programmable gate array (FPGA) device, another hardware device, a firmware device, or any combination thereof configured to perform the operations described herein.

[0080] The wireless device 702 may include a memory 706. The memory 706 may be a non-transitory computer-readable storage medium storing instructions 708 (which may include, for example, instructions executed by the processor 704). The instructions 708 may also be referred to as program code or a computer program. The memory 706 may also store data used by the processor 704 and results computed by the processor.

[0081] The wireless device 702 may include one or more transceivers 710, which may include radio frequency (RF) transmitter and / or receiver circuitry that uses an antenna 712 of the wireless device 702 to facilitate signaling (e.g., signaling 738) sent or received by the wireless device 702 with other devices (e.g., network device 720) in accordance with a corresponding RAT.

[0082] The wireless device 702 may include one or more antennas 712 (e.g., one, two, four, or more). For implementations with multiple antennas 712, the wireless device 702 may utilize the spatial diversity of such multiple antennas 712 to transmit and / or receive multiple different data streams on the same time-frequency resources. This behavior may be referred to as, for example, multiple-input multiple-output (MIMO) behavior (referring to multiple antennas used at each of the transmitting device and the receiving device to implement this aspect). MIMO transmission by the wireless device 702 may be implemented based on precoding (or digital beamforming) applied to the wireless device 702, which multiplexes data streams between antennas 712 based on known or assumed channel characteristics, so that each data stream is received at an appropriate signal strength relative to other streams and at a desired location in the spatial domain (e.g., the location of a receiver associated with the data stream). Some implementations may use a single-user MIMO (SU-MIMO) approach (where all data streams are directed to a single receiver) and / or a multi-user MIMO (MU-MIMO) approach (where separate data streams may be directed to separate (different) receivers in different locations in the spatial domain).

[0083] In some embodiments with multiple antennas, the wireless device 702 may implement analog beamforming techniques whereby the phases of signals transmitted by the antennas 712 are relatively adjusted so that the (joint) transmissions of the antennas 712 can be directed (this is sometimes referred to as beam steering).

[0084] The wireless device 702 may include one or more interfaces 714. The interface 714 may be used to provide input to the wireless device 702 or provide output from the wireless device. For example, the wireless device 702 as a UE may include an interface 714, such as a microphone, a speaker, a touch screen, buttons, etc., to allow a user of the UE to input and / or output to the UE. Other interfaces of such a UE may be composed of transmitters, receivers, and other circuit systems (e.g., in addition to the transceiver 710 / antenna 712 described above), which allow the UE to communicate with other devices and may communicate according to known protocols (e.g., etc.) to perform the operation.

[0085] The wireless device 702 may include a QoE reporting module 716. The QoE reporting module 716 may be implemented via hardware, software, or a combination thereof. For example, the QoE reporting module 716 may be implemented as a processor, circuit, and / or instructions 708 stored in the memory 706 and executed by the processor 704. In some examples, the QoE reporting module 716 may be integrated within the processor 704 and / or the transceiver 710. For example, the QoE reporting module 716 may be implemented by a combination of software components (e.g., executed by a DSP or a general purpose processor) and hardware components (e.g., logic gates and circuit systems) within the processor 704 or the transceiver 710.

[0086] From the perspective of the UE, the QoE reporting module 716 may be used in various aspects of the present disclosure, for example, Figures 3 to 5 all aspects.

[0087] The network device 720 may include one or more processors 722. The processor 722 may execute instructions to perform various operations as described herein for the network device 720. The processor 722 may include one or more baseband processors implemented using, for example, a CPU, a DSP, an ASIC, a controller, an FPGA device, another hardware device, a firmware device, or any combination thereof configured to perform the operations described herein.

[0088] The network device 720 may include a memory 724. The memory 724 may be a non-transitory computer-readable storage medium that stores instructions 726 (which may include, for example, instructions executed by the processor 722). The instructions 726 may also be referred to as program code or a computer program. The memory 724 may also store data used by the processor 722 and results calculated by the processor.

[0089] The network device 720 may include one or more transceivers 728, which may include RF transmitter and / or receiver circuitry that uses an antenna 730 of the network device 720 to facilitate signaling (e.g., signaling 738) transmitted or received by the network device 720 with other devices (e.g., wireless device 702) according to the corresponding RAT.

[0090] The network device 720 may include one or more antennas 730 (eg, one, two, four, or more). In embodiments with multiple antennas 730, the network device 720 may perform MIMO, digital beamforming, analog beamforming, beamsteering, etc. as described above.

[0091] The network device 720 may include one or more interfaces 732. The interface 732 may be used to provide input to or output from the network device 720. For example, the network device 720 as a base station may include an interface 732 composed of a transmitter, a receiver, and other circuit systems (e.g., in addition to the transceiver 728 / antenna 730 described above), which enables the base station to communicate with other equipment in the network and / or enables the base station to communicate with an external network, computer, database, etc., in order to achieve the purpose of operating, managing, and maintaining the base station or other equipment operably connected to the base station.

[0092] The network device 720 may include a QoE reporting module 734. The QoE reporting module 734 may be implemented via hardware, software, or a combination thereof. For example, the QoE reporting module 734 may be implemented as a processor, circuit, and / or instructions 726 stored in the memory 724 and executed by the processor 722. In some examples, the QoE reporting module 734 may be integrated within the processor 722 and / or the transceiver 728. For example, the QoE reporting module 734 may be implemented by a combination of software components (e.g., executed by a DSP or a general purpose processor) and hardware components (e.g., logic gates and circuit systems) within the processor 722 or the transceiver 728.

[0093] From the perspective of the base station, the QoE reporting module 734 may be used in various aspects of the present disclosure, for example, Figures 3 to 5 all aspects.

[0094] For one or more embodiments, at least one of the components set forth in one or more of the foregoing figures may be configured to perform one or more operations, techniques, processes, and / or methods as described herein. For example, a baseband processor as described herein in conjunction with one or more of the foregoing figures may be configured to operate according to one or more of the examples set forth herein. For another example, a circuit system associated with a UE, a base station, a network element, etc. as described above in conjunction with one or more of the foregoing figures may be configured to operate according to one or more of the examples set forth herein.

[0095] Unless otherwise expressly stated, any of the above embodiments may be combined with any other embodiment (or combination of embodiments). The foregoing description of one or more specific implementations provides illustration and description, but is not intended to be exhaustive or to limit the scope of the embodiments to the precise form described. In view of the above teachings, modifications and variations are possible or can be obtained from the practice of various embodiments.

[0096] Embodiments and implementations of the systems and methods described herein may include various operations that may be embodied in machine executable instructions to be executed by a computer system. A computer system may include one or more general or special purpose computers (or other electronic devices). A computer system may include hardware components that include specific logic components for performing operations; or may include a combination of hardware, software, and / or firmware.

[0097] The systems described herein relate to specific embodiments, but are provided as examples. These embodiments may be combined into a single system, partially combined into other systems, divided into multiple systems, or otherwise divided or combined. In addition, it is contemplated that parameters, attributes, aspects, etc. of another embodiment may be used in one embodiment. For clarity, these parameters, attributes, aspects, etc. are described only in one or more embodiments, and it should be recognized that unless explicitly stated herein, these parameters, attributes, aspects, etc. may be combined with or substituted for parameters, attributes, aspects, etc. of another embodiment.

[0098] It is understood that the use of personally identifiable information should be subject to privacy policies and practices that are generally recognized to meet or exceed industry or government requirements for maintaining user privacy. Specifically, personally identifiable information data should be managed and processed to minimize the risk of unintentional or unauthorized access or use, and the nature of the authorized use should be clearly stated to users.

[0099] Although the foregoing has been described in considerable detail for the sake of clarity, it will be apparent that changes and modifications may be made without departing from the principles of the invention. It should be noted that there are many alternative ways to implement both the processes and the apparatus described herein. Therefore, the embodiments of the present invention should be regarded as illustrative rather than restrictive, and the specification is not limited to the details given herein, but may be modified within the scope and equivalents of the appended claims.

Claims

1. A user equipment (UE), the user equipment (UE) comprising: Transceiver; and A processor, the processor being configured to: connecting the UE to a master node (MN) in a master cell group (MCG) and a secondary node (SN) in a secondary cell group (SCG) using the transceiver; performing at least one of application layer measurement or quality of experience (QoE) measurement for an application on the UE; generating at least one of an application layer measurement report or a QoE report; Using the transceiver, the application layer measurement report or the QoE report is sent to at least one of the MN or the SN in one or more segments based on an application layer measurement configuration, wherein the application layer measurement configuration describes at least one cell group for sending the application layer measurement report or the QoE report to the network.

2. The UE according to claim 1, wherein: The processor is configured to: receiving an indication of suspending sending the application layer measurement report or the QoE report to the network via the MCG and the SCG; Suspend sending the one or more segments of the application layer measurement report or the QoE report to the network via the MCG and the SCG.

3. The UE according to claim 1, wherein: The processor is configured to: receiving a first indication to suspend sending the application layer measurement report or the QoE report to the network via the MCG; and In response to the received first indication, the one or more segments of the application layer measurement report or the QoE report are sent to the network via the SCG.

4. The UE according to claim 3, wherein: The processor is configured to: receiving a second indication to resume sending the application layer measurement report or the QoE report to the network via the MCG; and In response to the received second indication, the one or more segments of the application layer measurement report or the QoE report are sent to the network via the MCG.

5. The UE according to claim 4, wherein: The first indication or the second indication is received from the MN or the SN in a radio resource control (RRC) signaling message or a MAC control element (MAC CE); and The application layer measurement report or the QoE report is a container-based report that is invisible to the MN or the SN in a Radio Access Network (RAN), or is a report that is visible to the MN or the SN in the RAN.

6. The UE according to claim 5, wherein: The processor is configured to: Based on the instruction received from the MN, ignoring the first indication or the second indication received from the SN; Ignore the first indication or the second indication received from the MN based on the instruction received from the SN; or Prioritizing the first indication or the second indication received from the MN or the SN based on one or more of the following: an identifier of the application layer measurement or the QoE measurement; The type of the application layer measurement or the QoE measurement; The geographical location of the UE; channel quality of the link between the UE and the MN; channel quality of the link between the UE and the SN; or A network slice associated with the received first indication or the received second indication.

7. The UE according to claim 3, wherein: The processor is configured to: receiving a second indication to resume sending the application layer measurement report or the QoE report to the network via the MCG; and In response to receiving the second indication: suspending sending the one or more segments of the application layer measurement report or the QoE report to the network via the SCG; as well as The one or more segments of the application layer measurement report or the QoE report are sent to the network via the MCG.

8. The UE according to claim 1, wherein: The processor is configured to: receiving a first indication to suspend sending the application layer measurement report or the QoE report to the network via the SCG; and In response to the received first indication, the one or more segments of the application layer measurement report or the QoE report are sent to the network via the MCG.

9. The UE according to claim 8, wherein: The processor is configured to: receiving a second indication to resume sending the application layer measurement report or the QoE report to the network via the SCG; and In response to the received second indication, the one or more segments of the application layer measurement report or the QoE report are sent to the network via the SCG.

10. The UE according to claim 9, wherein: The first indication or the second indication is received from the MN or the SN in a radio resource control (RRC) signaling message or a MAC control element (MAC CE); and The application layer measurement report or the QoE report is a container-based report that is invisible to the MN or the SN in a Radio Access Network (RAN), or is a report that is visible to the MN or the SN in the RAN.

11. The UE according to claim 10, wherein: The processor is configured to: Based on the instruction received from the MN, ignoring the first indication or the second indication received from the SN; Ignore the first indication or the second indication received from the MN based on the instruction received from the SN; or Prioritizing the first indication or the second indication received from the MN or the SN based on one or more of the following: an identifier of the application layer measurement or the QoE measurement; The type of the application layer measurement or the QoE measurement; The geographical location of the UE; channel quality of the link between the UE and the MN; channel quality of the link between the UE and the SN; or A network slice associated with the received first indication or the received second indication.

12. The UE according to claim 8, wherein: The processor is configured to: receiving a second indication to resume sending the application layer measurement report or the QoE report to the network via the SCG; and In response to receiving the second indication: suspending sending the one or more segments of the application layer measurement report or the QoE report to the network via the MCG; as well as The one or more segments of the application layer measurement report or the QoE report are sent to the network via the SCG.

13. The UE according to claim 1, wherein: The processor is configured to: sending the one or more segments of the application layer measurement report or the QoE report to the network via a transmission path including the MN or the SN; and When a trigger event is detected: changing the transmission path to include the SN instead of the MN, or to include the MN instead of the SN; or A signaling radio bearer corresponding to each of the multiple segments of the application layer measurement report or the QoE report is replicated to transmit each of the multiple segments of the application layer measurement report or the QoE report via the transmission path including the MN and the SN.

14. The UE according to claim 13, wherein the triggering event is associated with one of the following: UE mobility level; UE battery level; The geographical location of the UE; channel quality of the link between the UE and the MN; channel quality of the link between the UE and the SN; an identifier of the application layer measurement or the QoE measurement; The type of the application layer measurement or the QoE measurement; a network slice associated with the application layer measurement or the QoE measurement; The size of the application layer measurement report or the QoE measurement report; the number of radio link failures in the MCG or the SCG; activation or deactivation of a cell in the MCG or the SCG; or The number of activated cells in the MCG or the SCG.

15. The UE according to claim 1, wherein: The application layer measurement configuration is received from the MN or the SN; and The at least one cell group for sending the application layer measurement report or the QoE report to the network is selected by the UE based on a configuration including a protocol data unit (PDU) session ID list of the application layer measurement report or the QoE report visible to a radio access network (RAN).

16. A user equipment (UE), the user equipment (UE) comprising: Transceiver; and A processor, the processor being configured to: connecting the UE to a master node (MN) in a master cell group (MCG) and at least one secondary node (SN) in a secondary cell group (SCG) using the transceiver in a multi-connectivity (MC) mode; performing application layer measurement or quality of experience (QoE) measurement for an application on the UE; generating an application layer measurement report or a QoE report corresponding to the performed application layer measurement or the QoE measurement; segmenting the application layer measurement report or the QoE measurement report into at least a first subset and a second subset of a plurality of segments of the application layer measurement report or the QoE measurement report; as well as Using the transceiver, one or more segments of the first subset of the multiple segments are sent to the network via the MN in the MCG using a signaling radio bearer (SRB), and one or more segments of the second subset of the multiple segments are sent to the network via the at least one SN in the SCG using the SRB.

17. The UE according to claim 16, wherein: The application layer measurement report or the QoE measurement report is segmented based on a size of the application layer measurement report or the QoE report or an information element for setting a configurable Packet Data Convergence Protocol (PDCP) parameter for a Signaling Radio Bearer (SRB) and / or a Data Radio Bearer (DRB).

18. The UE according to claim 16, wherein: The processor is configured to: submitting the one or more segments of the first subset to a first radio link control (RLC) entity for transmission to the network via the MN in the MCG; as well as submitting the one or more segments of the second subset to a second RLC entity, So as to be sent to the network via the at least one SN in the SCG.

19. A base station, comprising: Transceiver; and A processor, the processor being configured to: connecting to the second base station and a user equipment (UE) using the transceiver in a dual connectivity mode with the base station and the second base station; sending, via the transceiver, an application layer measurement configuration to the UE, the application layer measurement configuration describing at least one cell group for sending an application layer measurement report or a QoE report to a network; as well as A plurality of segments of the application layer measurement report or the QoE report is received using the transceiver, the plurality of segments being generated by segmenting the application layer measurement report or the QoE report for transmission via a signaling radio bearer (SRB).

20. The base station according to claim 19, wherein: The base station is a master node (MN) in a master cell group (MCG) or a secondary node (SN) in a secondary cell group (SCG); and The multiple segments of the application layer measurement report or the QoE report are sent to the second base station, or the multiple segments are received from the UE or the second base station based on the type of the bearer associated with the SRB.

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