Reporting procedures for conditional handovers in wireless communication networks
By associating reports from master and secondary cell groups using C-RNTI and conditional reconfiguration identifiers, the system optimizes conditional handovers in 5G NR networks, addressing inefficiencies and improving resource management.
Patent Information
- Application Number
- PCT/CN2024/092326
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-05-10
- Publication Date
- 2025-07-31
AI Technical Summary
Current wireless communication systems face challenges in efficiently managing mobility robustness optimization during conditional handovers, particularly in 5G New Radio (NR) networks, where separate reporting of events related to master and secondary cell groups leads to inefficient resource allocation and sub-optimal network configurations.
The implementation of enhanced reporting mechanisms that associate reports of network events, such as radio link failures and successful handovers, using identifiers like Cell Radio Network Temporary Identifiers (C-RNTI) and conditional reconfiguration identifiers, to enable the network to accurately assess and optimize conditional handover configurations for both master and secondary cell groups.
This approach allows the network to better identify and address sub-optimal handover conditions, improving resource utilization and reducing wastage by correlating reports from both master and secondary cell groups, thereby enhancing network efficiency and reliability.
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Figure CN2024092326_31072025_PF_FP_ABST
Abstract
Description
REPORTING PROCEDURES FOR CONDITIONAL HANDOVERS IN WIRELESS COMMUNICATION NETWORKSTECHNICAL FIELD
[0001] This disclosure is directed generally to digital wireless communications.BACKGROUND
[0002] Mobile telecommunication technologies are moving the world toward an increasingly connected and networked society. In comparison with the existing wireless networks, next generation systems and wireless communication techniques will need to support a much wider range of use-case characteristics and provide a more complex and sophisticated range of access requirements and flexibilities.
[0003] Long-Term Evolution (LTE) is a standard for wireless communication for mobile devices and data terminals developed by 3rd Generation Partnership Project (3GPP) . LTE Advanced (LTE-A) is a wireless communication standard that enhances the LTE standard. The 5th generation of wireless system, known as 5G, advances the LTE and LTE-Awireless standards and is committed to supporting higher data-rates, large number of connections, ultra-low latency, high reliability and other emerging business needs.SUMMARY
[0004] Techniques are disclosed for performing mobility robustness optimization (MRO) in 5G New Radio (NR) and emerging cellular networks, especially when the user equipment (UE) is engaged in a conditional handover (CHO) with a secondary cell group (SCG) and subsequent conditional PSCell (primary cell of a secondary cell group) addition or change (CPAC) . The described embodiments provide, for example, methods for more efficiently using network resources, which advantageously improves networked communications.
[0005] In an example aspect, a wireless communication method includes receiving, by a wireless device from a network node, an information request message, and transmitting, to the network node in response to the information request message, an information response message comprising a first report corresponding to a first network event. In this example, the first report includes an identifier associated with a second report corresponding to a second network event, and the information response message is transmitted upon determining that a reporting flag is set to true and that information associated with the first network event is available.
[0006] In another example aspect, a wireless communication method includes transmitting, by a network node to a wireless device, an information request message, and receiving, by the network node from the wireless device subsequent to the transmitting, an information response message comprising a first report corresponding to a first network event. In this example, the first report includes an identifier associated with a second report corresponding to a second network event, and the wireless device is configured to transmit the information response message upon determining that a reporting flag is set to true and that information associated with the first network event is available.
[0007] In yet another example aspect, a wireless communication method includes transmitting, by a wireless device to a network node, a report in response to a network event. In this example, the network event includes at least one of an addition or change of a primary cell of a secondary cell group (PSCell) being performed, the addition or change of the PSCell failing, a radio link failure being detected, or a report request being received from the network node. Furthermore, the report includes at least one of (i) one or more PSCell identifiers for which execution conditions are fulfilled when executing (a) a reconfiguration with synchronization or (b) the addition or change of the PSCell, or (ii) a reconfiguration identifier associated with a conditional reconfiguration identifier for which execution conditions are fulfilled when executing (a) the reconfiguration with synchronization or (b) the addition or change of the PSCell.
[0008] In yet another example aspect, the above-described methods are embodied in the form of processor-executable code and stored in a non-transitory computer-readable storage medium. The code included in the computer readable storage medium when executed by a processor, causes the processor to implement the methods described in this patent document.
[0009] In yet another example aspect, a device that is configured or operable to perform the above-described methods is disclosed.
[0010] The above and other aspects and their implementations are described in greater detail in the drawings, the descriptions, and the claims.
[0011] BRIEF DESCRIPTION OF THE DRAWING
[0012] FIG. 1 is an example wireless communication system with a user equipment (UE) in a dual connectivity configuration with a master node (MN) and a secondary node (SN) .
[0013] FIGS. 2–4 show flowcharts for example wireless communication methods.
[0014] FIG. 5 shows a block diagram of an example hardware platform that may be a part of a network device or a communication device.
[0015] FIG. 6 shows an example of wireless communication including a base station (BS) and user equipment (UE) based on some implementations of the disclosed technology.DETAILED DESCRIPTION
[0016] In current 5G NR communication systems, the network can implement mobility management when UEs are in the RRC_CONNECTED mode. A Conditional Handover (CHO) is defined as a handover that is executed by the UE when one or more handover execution conditions are met. The UE starts evaluating the execution condition (s) upon receiving the CHO configuration, and stops evaluating the execution condition (s) once a handover is executed. Herein, the CHO configuration contains (i) the configuration of CHO candidate cell (s) generated by the candidate base station (s) and (ii) the execution condition (s) generated by the source base station. The UE then performs the handover or cell change based on the CHO configuration.
[0017] Thus, it is important to let the network know whether the provided CHO configuration is suitable, so that the network can perform Mobility Robustness Optimization (MRO) , which can be used to detect connection failures that occur due to handovers occurring too early, handovers occurring too late, or handovers to the wrong cell. When a CHO failure occurs, the UE can store the failure information, and subsequently report it to the network.
[0018] In other scenarios, even if the CHO is successful, the T304 timer or the T310 / T312 timers running for a long time can be indicative of the configuration being sub-optimal. In order to analyze a sub-optimal successful CHO, the UE can collect a Successful Handover Report (SHR) based on the triggers configured by the network. In some examples, the trigger is defined as the ratio between the value of the elapsed time of the T310 timer (or the T312 or T304 timers) and the configured value of the T310 timer (or the T312 or T304 timers, respectively) being greater than a preconfigured threshold. Based on the SHR, the network can decide to adjust the T310 timer (or the T312 or T304 timer) values.
[0019] When the UE is configured with multi-connectivity operation (e.g., dual-connectivity for the UE, as shown in FIG. 1) , similar CHO principles can be used for the configuration and execution of CHO for both the master node (MN) and the secondary node (SN) . However, if the provided CHO with the Secondary Cell Group (SCG) configuration is not suitable (e.g., the evaluation condition for both MN and SN cannot be satisfied at the same time) , then the UE cannot perform CHO with SCG at any time, and resources allocated by the network are wasted.
[0020] The example headings for the various sections below are used to facilitate the understanding of the disclosed subject matter and do not limit the scope of the claimed subject matter in any way. Accordingly, one or more features of one example section can be combined with one or more features of another example section. Furthermore, 5G (or 5G NR) terminology is used for the sake of clarity of explanation, but the techniques disclosed in the present document are not limited to 5G (or 5G NR) technology only, and may be used in other wireless systems that implement alternative protocols.
[0021] 1 Introduction and overview
[0022] In existing cellular systems, and as shown in FIG. 1, if the UE handover fails or a radio link failure is detected in the MN cell, the UE (or wireless device) may store and send Radio Link Failure (RLF) report to the network (or network node) when the link to the MN is restored. Alternatively, the UE could send the RLF report to a third network node that could then forward the RLF report to the MN cell. However, if the UE detects a PSCell (primary cell of secondary cell group) change failure or a radio link failure in the SN Cell, it may send SCG failure message to the MN Cell.
[0023] Alternatively, even if the UE does not detect the RLF or handover failure, if the ratio between the value of the elapsed time of the timer (e.g., T304, T310 or T312 timers) and the configured value of that timer (e.g., T304 , T310 or T312 timers, respectively) exceeds a threshold percentage of the respective timer, the situation is interpreted as a near-failure or sub-optimal case, which should also be avoided. If the near-failure case happens on the MN Cell, the UE can store and send a Successful Handover Report (SHR) to the network. If the near-failure case happens on the SN Cell, the UE can also store and send the SHR to the network. As discussed above, in existing implementations, each of the various reports are sent separately.
[0024] When a UE is configured with one or more candidate target MN cells associated with one or more candidate target SN cells for multi-connectivity CHO operation (also referred to as CHO with candidate SCGs) , the UE will evaluate the conditions for the candidate target MN cells and the associated candidate target SN cells in parallel, and apply a target configuration that includes an MN cell and an SN cell for which the associated execution conditions are fulfilled.
[0025] In some scenarios, performing a PCell (primary cell of master cell group) change and / or a PSCell change can occur concurrently with triggering the transmission of an RLF failure message or SHR report on MN cells and / or a SCG failure message or a Successful PSCell addition or change Report (SPR) report on SN cells. However, existing implementations transmit the failure or SHR report on MN cells and the failure or SPR report on SN cells separately, which results in the network being unable to determine whether the report for MN cells and the report for SN cells are associated with the same event (e.g., the UE performing CHO with candidate SCGs) .
[0026] Since the UE can perform a master cell group (MCG) handover (change) only when both the execution conditions configured for the target MN cells and the target SN cells are fulfilled, the execution conditions configuration and measurement results for SN cells have an impact on the MN cells.
[0027] When a UE is configured with one or more candidate target MCG cells associated with one or more candidate target SCG cells for multi-connectivity CHO operation (also referred to as CHO with candidate SCGs) , the UE will evaluate the conditions for the candidate target MCG cells and the associated candidate target SCG cells in parallel, and apply a target configuration that includes an MCG cell and an SCG cell for which the associated execution conditions are fulfilled.
[0028] In an example implementation, when a UE is configured for CHO with candidate SCGs, it receives ConditionalReconfiguration which may including a list of CondReconfig, with each CondReconfig being associated with a CondReconfigId and optionally including condExecutionCond, condExecutionCondPSCell, and target candidate cell (s) (including PCell and PSCell) information elements from the network. For example:
[0029] Then if event (s) associated with all measId (s) , as indicated in the condExecutionCond and condExecutionCondPSCell, are fulfilled, the UE will consider the target candidate PCell as a triggered PCell, and the target candidate PSCell as a triggered PSCell. Then the UE will initiate the conditional reconfiguration execution. In other words, only when the conditions for the candidate target MCG cell (s) and the conditions for the candidate target SCG cell (s) are met, can the UE can perform a multi-connectivity CHO operation.
[0030] 2 Example scenarios for CHO with candidate SCGs
[0031] Embodiments of the disclosed technology can be implemented in examples scenarios (or cases) where (a) a CHO with candidate SCGs is triggered under different combinations of failure-success-suboptimality for MN or SN mobility, and (b) a CHO with candidate SCGs is not triggered, but another issue exists, e.g., a radio link failure at either node.
[0032] 2.1 CHO with candidate SCGs is triggered
[0033] In the following cases, it is assumed that the UE (or wireless device) can indicate to the network (or network node) any association between the report (e.g., RLF report, SHR) for the MN cell and the report (e.g., SCG failure report, SPR) for the SN cell, thereby enabling the network to identify the specific case. For example, the association could be indicated using a Cell Radio Network Temporary Identifier (C-RNTI) , which can be sent from the UE to the network to identify the association to the network. Furthermore, a report (e.g., SHR, SPR, etc. ) being triggered corresponds to triggering a transmission of the report.
[0034] Case 1 During PSCell addition or change, SPR is triggered; the PCell change (handover) is successful; subsequently, a radio link failure is detected in the PCell
[0035] In this case, when the UE performs a CHO with candidate SCGs, both the SPR and the RLF report are triggered, but they may not necessarily be transmitted to the network at the same time. In order to inform the network that the SPR and RLF report are associated with the same event, the following embodiments can be implemented.
[0036] In some embodiments, the SPR includes an identifier (id) that associates the SPR to the RLF report. The identifier, for example, provides an indication (and / or information) of an association (or relationship) between the SPR and the RLF report. In this example, the identifier can be at least one of the following:
[0037] –the target PCell id and / or C-RNTI used in the target PCell
[0038] –the target PSCell id and / or C-RNTI used in the target PSCell
[0039] –the source PCell id and / or C-RNTI used in the source PCell
[0040] –the source PSCell id and / or C-RNTI used in the source PSCell
[0041] –the Reconfig id associated with condReconfigId for the selected cell (s) of conditional reconfiguration execution
[0042] –the PCell or PSCell id that provides the CHO with the SCG configuration
[0043] –the indication of whether the Secondary Node (SN) or the Master Node (MN) provides the CHO with the SCG configuration
[0044] Herein, condReconfigId is included in a Radio Resource Control (RRC) configuration message, and can be associated to a candidate PSCell and / or candidate PCell in a CHO with SCG configuration.
[0045] In some embodiments, the RLF report includes an identifier (id) that associates the RLF report to the SPR. The identifier, for example, provides an indication (and / or information) of an association (or relationship) between the RLF report and the SPR. In this example, the identifier can be at least one of the following:
[0046] –the PCell id and / or C-RNTI used in the PCell upon detecting an RLF
[0047] –the PSCell id and / or C-RNTI used in the PSCell when an RLF is detected
[0048] –the PSCell id and / or C-RNTI used in the PSCell before executing the last reconfiguration with synchronization
[0049] –the PCell id and / or C-RNTI used in the PCell before executing the last reconfiguration with synchronization
[0050] –the Reconfig id associated with condReconfigId for the selected cell (s) of conditional reconfiguration execution
[0051] –the PCell or PSCell id that provides the CHO with SCG configuration
[0052] –the indication of whether SN or MN provides the CHO with SCG configuration
[0053] Herein, condReconfigId is included in an RRC configuration message, and can be associated to a candidate PSCell and / or candidate PCell in a CHO with SCG configuration.
[0054] In some embodiments, the RLF report (upon including an identifier and / or being associated with an identifier) includes a cause value that indicates the RLF report was triggered due to a radio link failure.
[0055] In these embodiments, if the network acquires the RLF report and SPR at different times, and if (a) the target PCell id and / or C-RNTI used in the target PCell in the SPR and (b) the PCell id and / or C-RNTI used in the PCell in the RLF report are the same, the network can determine that the messages are in the context of a “Case 1” scenario. Similarly, if (a) the target PSCell id and / or C-RNTI used in the target PSCell in the SPR and (b) the PSCell id and / or C-RNTI used in the PSCell in the RLF report, respectively, are the same, the network determines that a “Case 1” scenario is happening.
[0056] Alternatively, if the source PCell id and / or C-RNTI used in the source PCell in the SPR and the PSCell id and / or C-RNTI used in the PSCell before executing the last reconfiguration with synchronization in the RLF report are the same, the network determines that “Case 1” is happening.
[0057] Alternatively, if the PCell or PSCell id that provides the CHO with SCG configuration and the Reconfig id are the same in the SPR and the RLF report, the network determines that “Case 1” is happening.
[0058] Case 2 During PSCell addition or change, SPR is triggered; during PCell change (handover) , SHR is triggered
[0059] In this case, when the UE performs a CHO with candidate SCGs, both the SPR and the SHR are triggered, but they may not necessarily be transmitted to the network at the same time. In order to inform the network that the SPR and SHR are associated with the same event, the following embodiments can be implemented.
[0060] In some embodiments, the SPR includes an identifier (id) that associates the SPR to the SHR. The identifier, for example, provides an indication (and / or information) of an association (or relationship) between the SPR and the SHR. In this example, the identifier can be at least one of the following:
[0061] –the target PCell id and / or C-RNTI assigned by the target PCell of the handover
[0062] –the target PCell id and / or C-RNTI assigned by target PSCell of the handover
[0063] –the source PCell id and / or C-RNTI used in the source PCell
[0064] –the source PSCell id and / or C-RNTI used in the source PSCell
[0065] –the Reconfig id associated with condReconfigId for the selected cell (s) of conditional reconfiguration execution
[0066] –the PCell or PSCell id that provides the CHO with SCG configuration
[0067] –the indication of whether SN or MN provides the CHO with SCG configuration
[0068] Herein, condReconfigId is included in an RRC configuration message, and can be associated to a candidate PSCell and / or candidate PCell in a CHO with SCG configuration. In addition, the target PCell is the target MN cell of the CHO with SCGs, and the target PSCell is the target SN cell of the CHO with SCGs.
[0069] In some embodiments, the SHR includes an identifier (id) that associates the SHR to the SPR. The identifier, for example, provides an indication (and / or information) of an association (or relationship) between the SHR and the SPR. In this example, the identifier can be at least one of the following:
[0070] –the target PCell id and / or C-RNTI assigned by target PCell of the handover
[0071] –the target PCell id and / or C-RNTI assigned by target PSCell of the handover
[0072] –the source PCell id and / or C-RNTI used in the source PCell
[0073] –the source PSCell id and / or C-RNTI used in the source PSCell
[0074] –the Reconfig id associated with condReconfigId for the selected cell (s) of conditional reconfiguration execution
[0075] –the PCell or PSCell id that provides the CHO with SCG configuration
[0076] –the indication of whether SN or MN provides the CHO with SCG configuration
[0077] Herein, condReconfigId is included in an RRC configuration message, and can be associated to a candidate PSCell and / or candidate PCell in a CHO with SCG configuration. In addition, the target PCell is the target MN cell of the CHO with SCGs, and the target PSCell is the target SN cell of the CHO with SCGs.
[0078] In these embodiments, if the network acquires the SHR and SPR at different times, and if the target PCell id and / or C-RNTI used in the target PCell in the SPR and SHR are the same, the network can determine that the messages are in the context of a “Case 2” scenario. Similarly, if the target PSCell id and / or C-RNTI used in the target PSCell in the SPR and SHR are the same, the network determines that a “Case 2” scenario is happening.
[0079] Alternatively, if the PCell or PSCell id that provides the CHO with SCG configuration and the Reconfig id are the same in the SPR and the SHR, the network determines that “Case 2” is happening.
[0080] In some embodiments, both the SPR and SHR include the same identifier (id) , which reciprocally associates the SPR and SHR to each other. In some examples, the identifier can be a random number within a configured range. Herein, each random number is associated to a CHO with or without an SCG executing event. In these examples, if the network acquires the SHR and SPR, and the identifier (id) in the SPR and SHR are the same, the network can determine that the messages are in the context of a “Case 2” scenario.
[0081] Case 3 During PSCell addition or change, SPR is triggered; during PCell change (handover) , RLF report is triggered due to handover failure
[0082] In this case, when the UE performs a CHO with candidate SCGs, both the SPR and the RLF report are triggered, but they may not necessarily be transmitted to the network at the same time. In order to inform the network that the SPR and RLF report are associated with the same event, the following embodiments can be implemented.
[0083] In some embodiments, the SPR includes an identifier (id) that associates the SPR to the RLF report. The identifier, for example, provides an indication (and / or information) of an association (or relationship) between the SPR and the RLF report. In this example, the identifier can be at least one of the following:
[0084] –the target PCell id and / or C-RNTI assigned by the target PCell of handover
[0085] –the target PCell id and / or C-RNTI assigned by target PSCell of the handover
[0086] –the source PCell id and / or C-RNTI used in the source PCell
[0087] –the source PSCell id and / or C-RNTI used in the source PSCell
[0088] –the Reconfig id associated with condReconfigId for the selected cell (s) of conditional reconfiguration execution
[0089] –the PCell or PSCell id that provides the CHO with SCG configuration
[0090] –the indication of whether SN or MN provides the CHO with SCG configuration
[0091] Herein, condReconfigId is included in a Radio Resource Control (RRC) configuration message, and can be associated to a candidate PSCell and / or candidate PCell in a CHO with SCG configuration.
[0092] In some embodiments, the RLF report includes an identifier (id) that associates the RLF report to the SPR. The identifier, for example, provides an indication (and / or information) of an association (or relationship) between the RLF report and the SPR. In this example, the identifier can be at least one of the following:
[0093] –the PCell id and / or C-RNTI used in the PCell upon detecting an RLF
[0094] –the PSCell id and / or C-RNTI used in the PSCell when an RLF is detected
[0095] –the Reconfig id associated with condReconfigId for the selected cell (s) of conditional reconfiguration execution
[0096] –the PCell or PSCell id that provides the CHO with SCG configuration
[0097] –the indication of whether SN or MN provides the CHO with SCG configuration
[0098] Herein, condReconfigId is included in an RRC configuration message, and can be associated to a candidate PSCell and / or candidate PCell in a CHO with SCG configuration. In addition, the target PCell is the target MN cell of the CHO with SCGs, and the target PSCell is the target SN cell of the CHO with SCGs.
[0099] In some embodiments, the RLF report (upon including an identifier and / or being associated with an identifier) includes a cause value that indicates the RLF report was triggered due to a radio link failure.
[0100] In these embodiments, if the network acquires the RLF report and SPR at different times, and if (a) the target PCell id in the SPR and the PCell id in the RLF report are the same, and (b) the C-RNTI used in the target PCell in the SPR and the C-RNTI used in the PCell in the RLF report are the same, the network can determine that the messages are in the context of a “Case 3” scenario.
[0101] Alternatively, if (a) the target PSCell id in the SPR and the PSCell id in the RLF report are the same, and (b) the C-RNTI used in the target PSCell in the SPR and the C-RNTI used in the PSCell in the RLF report are the same, the network determines that a “Case 3” scenario is happening.
[0102] Alternatively, if the PCell or PSCell id that provides the CHO with SCG configuration and the Reconfig id are the same in the SPR and the RLF report, the network determines that “Case 3” is happening.
[0103] In some embodiments, both the SPR and RLF report include the same identifier (id) , which reciprocally associates the SPR and RLF report to each other. In some examples, the identifier can be a random number within a configured range. Herein, each random number is associated to a CHO with or without an SCG executing event. In these examples, if the network acquires the SHR and RLF report, and the identifier (id) in the SPR and RLF report are the same, the network can determine that the messages are in the context of a “Case 3” scenario.
[0104] Case 4 When PSCell addition or change fails, SCG failure report is triggered; the PCell change (handover) is successful; subsequently, a radio link failure is detected in the PCell In this case, when the UE performs a CHO with candidate SCGs, both the SCG failure report and the RLF report are triggered, but they may not necessarily be transmitted to the network at the same time. In order to inform the network that the SCG failure report and RLF report are associated with the same event, the following embodiments can be implemented.
[0105] In some embodiments, the SCG failure report includes an identifier (id) that associates the SCG failure report to the RLF report. The identifier, for example, provides an indication (and / or information) of an association (or relationship) between the SCG failure report and the RLF report. In this example, the identifier can be at least one of the following:
[0106] –the target PCell id and / or C-RNTI used in the target PCell
[0107] –the target PSCell id and / or C-RNTI used in the target PSCell
[0108] –the source PCell id and / or C-RNTI used in the source PCell
[0109] –the source PSCell id and / or C-RNTI used in the source PSCell
[0110] –the Reconfig id associated with condReconfigId for the selected cell (s) of conditional reconfiguration execution
[0111] –the PCell or PSCell id that provides the CHO with SCG configuration
[0112] –the indication of whether SN or MN provides the CHO with SCG configuration
[0113] Herein, condReconfigId is included in a RRC configuration message, and can be associated to a candidate PSCell and / or candidate PCell in a CHO with SCG configuration.
[0114] In some embodiments, the RLF report includes an identifier (id) that associates the RLF report to the SCG failure report. The identifier, for example, provides an indication (and / or information) of an association (or relationship) between the RLF report and the SCG failure report. In this example, the identifier can be at least one of the following:
[0115] –the PCell id and / or C-RNTI used in the PCell upon detecting an RLF
[0116] –the PSCell id and / or C-RNTI used in the PSCell when an RLF is detected
[0117] –the PSCell id and / or C-RNTI used in the PSCell before executing the last reconfiguration with synchronization
[0118] –the PCell id and / or C-RNTI used in the PCell before executing the last reconfiguration with synchronization
[0119] –the Reconfig id associated with condReconfigId for the selected cell (s) of conditional reconfiguration execution
[0120] –the PCell or PSCell id that provides the CHO with SCG configuration
[0121] –the indication of whether SN or MN provides the CHO with SCG configuration
[0122] Herein, condReconfigId is included in an RRC configuration message, and can be associated to a candidate PSCell and / or candidate PCell in a CHO with SCG configuration.
[0123] In some embodiments, the RLF report (upon including an identifier and / or being associated with an identifier) includes a cause value that indicates the RLF report was triggered due to a radio link failure. Additionally, or alternatively, the SCG failure report also includes a cause value that indicates the SCG failure report was triggered due to a PSCell addition or change failure.
[0124] In these embodiments, if the network acquires the RLF report and SCG failure report at different times, and if (a) the target PCell id in the SCG failure report and the PCell id in the RLF report are the same, and (b) the C-RNTI used in the target PCell in the SCG failure report and the C-RNTI used in the PCell in the RLF report are the same, the network can determine that the messages are in the context of a “Case 4” scenario.
[0125] Alternatively, if (a) the target PSCell id in the SCG failure report and the PSCell id in the RLF report are the same, and (b) the C-RNTI used in the target PSCell in the SCG failure report and the C-RNTI used in the PSCell in the RLF report are the same, the network determines that a “Case 4” scenario is happening.
[0126] Alternatively, if the PCell or PSCell id that provides the CHO with SCG configuration and the Reconfig id are the same in the SCG failure report and the RLF report, the network determines that “Case 4” is happening.
[0127] Case 5 When PSCell addition or change fails, SCG failure report is triggered; and during PCell change (handover) , SHR is triggered
[0128] In this case, when the UE performs a CHO with candidate SCGs, both the SCG failure report and the SHR are triggered, but they may not necessarily be transmitted to the network at the same time. In order to inform the network that the SCG failure report and SHR are associated with the same event, the following embodiments can be implemented.
[0129] In some embodiments, the SCG failure report includes an identifier (id) that associates the SCG failure report to the SHR. The identifier, for example, provides an indication (and / or information) of an association (or relationship) between the SCG failure report and the SHR. In this example, the identifier can be at least one of the following:
[0130] –the target PCell id and / or C-RNTI used in the target PCell
[0131] –the target PSCell id and / or C-RNTI used in the target PSCell
[0132] –the source PCell id and / or C-RNTI used in the source PCell
[0133] –the source PSCell id and / or C-RNTI used in the source PSCell
[0134] –the Reconfig id associated with condReconfigId for the selected cell (s) of conditional reconfiguration execution
[0135] –the PCell or PSCell id that provides the CHO with SCG configuration
[0136] –the indication of whether SN or MN provides the CHO with SCG configuration
[0137] Herein, condReconfigId is included in a RRC configuration message, and can be associated to a candidate PSCell and / or candidate PCell in a CHO with SCG configuration.
[0138] In some embodiments, the SHR includes an identifier (id) that associates the SHR to the SCG failure report. The identifier, for example, provides an indication (and / or information) of an association (or relationship) between the SHR and the SCG failure report. In this example, the identifier can be at least one of the following:
[0139] –the target PCell id and / or C-RNTI assigned by the target PCell of handover
[0140] –the target PCell id and / or C-RNTI assigned by the target PSCell of the handover
[0141] –the source PCell id and / or C-RNTI used in the source PCell
[0142] –the source PSCell id and / or C-RNTI used in the source PSCell
[0143] –the Reconfig id associated with condReconfigId for the selected cell (s) of conditional reconfiguration execution
[0144] –the PCell or PSCell id that provides the CHO with SCG configuration
[0145] –the indication of whether SN or MN provides the CHO with SCG configuration
[0146] Herein, condReconfigId is included in an RRC configuration message, and can be associated to a candidate PSCell and / or candidate PCell in a CHO with SCG configuration.
[0147] In some embodiments, the SCG failure report also includes a cause value that indicates the SCG failure report was triggered due to a PSCell addition or change failure.
[0148] In these embodiments, if the network acquires the SHR and SCG failure report at different times, and if (a) the target PCell id in the SCG failure report and the target PCell id in the SHR are the same, and (b) the C-RNTI used in the target PCell in the SCG failure report and the C-RNTI used in the target PCell in the SHR are the same, the network can determine that the messages are in the context of a “Case 5” scenario.
[0149] Alternatively, if (a) the target PSCell id in the SCG failure report and the target PSCell id in the SHR are the same, and (b) the C-RNTI used in the target PSCell in the SCG failure report and the C-RNTI used in the target PSCell in the SHR are the same, the network determines that a “Case 5” scenario is happening.
[0150] Alternatively, if the PCell or PSCell id that provides the CHO with SCG configuration and the Reconfig id are the same in the SCG failure report and the SHR, the network determines that “Case 5” is happening.
[0151] In some embodiments, both the SPR and SCG failure report include the same identifier (id) , which reciprocally associates the SPR and SCG failure report to each other. In some examples, the identifier can be a random number within a configured range. Herein, each random number is associated to a CHO with or without an SCG executing event. In these examples, if the network acquires the SHR and SCG failure report, and the identifier (id) in the SPR and SCG failure report are the same, the network can determine that the messages are in the context of a “Case 5” scenario.
[0152] Case 6 When PSCell addition or change fails, SCG failure report is triggered; and during PCell change (handover) , RLF report is triggered due to handover failure
[0153] In this case, when the UE performs a CHO with candidate SCGs, both the SCG failure report and the RLF report are triggered, but they may not necessarily be transmitted to the network at the same time. In order to inform the network that the SCG failure report and the RLF report are associated with the same event, the following embodiments can be implemented.
[0154] In some embodiments, the SCG failure report includes an identifier (id) that associates the SCG failure report to the RLF report. The identifier, for example, provides an indication (and / or information) of an association (or relationship) between the SCG failure report and the RLF report. In this example, the identifier can be at least one of the following:
[0155] –the target PCell id and / or C-RNTI used in the target PCell
[0156] –the target PSCell id and / or C-RNTI used in the target PSCell
[0157] –the source PCell id and / or C-RNTI used in the source PCell
[0158] –the source PSCell id and / or C-RNTI used in the source PSCell
[0159] –the Reconfig id associated with condReconfigId for the selected cell (s) of conditional reconfiguration execution
[0160] –the PCell or PSCell id that provides the CHO with SCG configuration
[0161] –the indication of whether SN or MN provides the CHO with SCG configuration
[0162] Herein, condReconfigId is included in a RRC configuration message, and can be associated to a candidate PSCell and / or candidate PCell in a CHO with SCG configuration.
[0163] In some embodiments, the RLF report includes an identifier (id) that associates the RLF report to the SCG failure report. The identifier, for example, provides an indication (and / or information) of an association (or relationship) between the RLF report and the SCG failure report. In this example, the identifier can be at least one of the following:
[0164] –the target PCell id and / or C-RNTI used in the target PCell
[0165] –the target PSCell id and / or C-RNTI used in the target PSCell
[0166] –the source PCell id and / or C-RNTI used in the source PCell
[0167] –the source PSCell id and / or C-RNTI used in the source PSCell
[0168] –the Reconfig id associated with condReconfigId for the selected cell (s) of conditional reconfiguration execution
[0169] –the PCell or PSCell id that provides the CHO with SCG configuration
[0170] –the indication of whether SN or MN provides the CHO with SCG configuration
[0171] Herein, condReconfigId is included in an RRC configuration message, and can be associated to a candidate PSCell and / or candidate PCell in a CHO with SCG configuration.
[0172] In these embodiments, the network acquires the SCG failure report and the RLF report at different times, and if (a) the target PCell id in the SCG failure report and the PCell id in the RLF report are the same, and (b) the C-RNTI used in the target PCell in the SCG failure report and the C-RNTI used in the PCell in the RLF report are the same, the network can determine that the messages are in the context of a “Case 6” scenario.
[0173] Alternatively, if (a) the target PSCell id in the SCG failure report and the PSCell id in the RLF report are the same, and (b) the C-RNTI used in the target PSCell in the SCG failure report and the C-RNTI used in the PSCell in the RLF report are the same, the network determines that a “Case 6” scenario is happening.
[0174] Alternatively, if the PCell or PSCell id that provides the CHO with SCG configuration and the Reconfig id are the same in the SCG failure report and the RLF report, the network determines that “Case 6” is happening.
[0175] In some embodiments, both the RLF report and the SCG failure report include the same identifier (id) , which reciprocally associates the RLF report and SCG failure report to each other. In some examples, the identifier can be a random number within a configured range. Herein, each random number is associated to a CHO with or without an SCG executing event. In these examples, if the network acquires the RLF report and SCG failure report, and the identifier (id) in the RLF report and SCG failure report are the same, the network can determine that the messages are in the context of a “Case 6” scenario.
[0176] Case 7 During PCell change (handover) , SHR is triggered; the PSCell change is successful; subsequently, a radio link failure is detected in the PSCell
[0177] In this case, when the UE performs a CHO with candidate SCGs, both the SHR and SCG failure report are triggered, but they may not necessarily be transmitted to the network at the same time. In order to inform the network that the SHR and SCG failure report are associated with the same event, the following embodiments can be implemented.
[0178] In some embodiments, the SHR includes an identifier (id) that associates the SHR to the SCG failure report. The identifier, for example, provides an indication (and / or information) of an association (or relationship) between the SHR and the SCG failure report. In this example, the identifier can be at least one of the following:
[0179] –the target PCell id and / or C-RNTI assigned by target PCell of the handover
[0180] –the target PCell id and / or C-RNTI assigned by target PSCell of the handover
[0181] –the source PCell id and / or C-RNTI used in the source PCell
[0182] –the source PSCell id and / or C-RNTI used in the source PSCell
[0183] –the Reconfig id associated with condReconfigId for the selected cell (s) of conditional reconfiguration execution
[0184] –the PCell or PSCell id that provides the CHO with SCG configuration
[0185] –the indication of whether SN or MN provides the CHO with SCG configuration
[0186] Herein, condReconfigId is included in an RRC configuration message, and can be associated to a candidate PSCell and / or candidate PCell in a CHO with SCG configuration. In addition, the target PCell is the target MN cell of the CHO with SCGs, and the target PSCell is the target SN cell of the CHO with SCGs.
[0187] In some embodiments, the SCG failure report includes an identifier (id) that associates the SCG failure report to the SHR. The identifier, for example, provides an indication (and / or information) of an association (or relationship) between the SCG failure report and the SHR. In this example, the identifier can be at least one of the following:
[0188] –the PCell id and / or C-RNTI used in the PCell upon detecting an RLF
[0189] –the PSCell id and / or C-RNTI used in the PSCell when an RLF is detected
[0190] –the Reconfig id associated with condReconfigId for the selected cell (s) of conditional reconfiguration execution
[0191] –the PCell or PSCell id that provides the CHO with SCG configuration
[0192] –the indication of whether SN or MN provides the CHO with SCG configuration
[0193] Herein, condReconfigId is included in an RRC configuration message, and can be associated to a candidate PSCell and / or candidate PCell in a CHO with SCG configuration.
[0194] In some embodiments, the RLF report (upon including an identifier and / or being associated with an identifier) includes a cause value that indicates the RLF report was triggered due to a radio link failure.
[0195] In these embodiments, the network acquires the SHR and RLF report at different times, and if (a) the target PCell id in the SHR and the PCell id in the RLF report are the same, and (b) the C-RNTI used in the target PCell in the SHR and the C-RNTI used in the PCell in the RLF report are the same, the network can determine that the messages are in the context of a “Case 7” scenario.
[0196] Alternatively, if (a) the target PSCell id in the SHR and the PSCell id in the RLF report are the same, and (b) the C-RNTI used in the target PSCell in the SHR and the C-RNTI used in the PSCell in the RLF report are the same, the network determines that a “Case 7” scenario is happening.
[0197] Alternatively, if the PCell or PSCell id that provides the CHO with SCG configuration and the Reconfig id are the same in the SCG failure report and the SHR, the network determines that “Case 7” is happening.
[0198] Case 8 During PCell change (handover) , RLF report is triggered; the PSCell change is successful; subsequently, a radio link failure is detected in the PSCell
[0199] In this case, when the UE performs a CHO with candidate SCGs, both the RLF report due to handover failure ( “the first RLF report” ) and the RLF report due to the radio link failure in the SCG ( “the second RLF report” or more specifically, the SCG failure report) are triggered, but they may not necessarily be transmitted to the network at the same time. In order to inform the network that the first RLF report and the second RLF report are associated with the same event, the following embodiments can be implemented.
[0200] In some embodiments, the first RLF report includes an identifier (id) that associates the first RLF report to the second RLF report. The identifier, for example, provides an indication (and / or information) of an association (or relationship) between the first RLF report and the second RLF report. In this example, the identifier can be at least one of the following:
[0201] –the target PCell id and / or C-RNTI assigned by the target PCell of the handover
[0202] –the target PCell id and / or C-RNTI assigned by the target PSCell of the handover
[0203] –the source PCell id and / or C-RNTI used in the source PCell
[0204] –the source PSCell id and / or C-RNTI used in the source PSCell
[0205] –the Reconfig id associated with condReconfigId for the selected cell (s) of conditional reconfiguration execution
[0206] –the PCell or PSCell id that provides the CHO with SCG configuration
[0207] –the indication of whether SN or MN provides the CHO with SCG configuration
[0208] Herein, condReconfigId is included in an RRC configuration message, and can be associated to a candidate PSCell and / or candidate PCell in a CHO with SCG configuration.
[0209] In some embodiments, the second RLF report includes an identifier (id) that associates the second RLF report to the first RLF report. The identifier, for example, provides an indication (and / or information) of an association (or relationship) between the second RLF report and the first RLF report. In this example, the identifier can be at least one of the following:
[0210] –the PCell id and / or C-RNTI used in PCell upon detecting the second RLF
[0211] –the PSCell id and / or C-RNTI used in PSCell when the second RLF is detected
[0212] –the Reconfig id associated with condReconfigId for the selected cell (s) of conditional reconfiguration execution
[0213] –the PCell or PSCell id that provides the CHO with SCG configuration
[0214] –the indication of whether SN or MN provides the CHO with SCG configuration
[0215] Herein, condReconfigId is included in an RRC configuration message, and can be associated to a candidate PSCell and / or candidate PCell in a CHO with SCG configuration. In addition, the target PCell is the target MN cell of the CHO with SCGs, and the target PSCell is the target SN cell of the CHO with SCGs.
[0216] In some embodiments, the second RLF report (upon including an identifier and / or being associated with an identifier) includes a cause value that indicates the second RLF report was triggered due to a radio link failure.
[0217] In these embodiments, the network acquires the first RLF report and the second RLF report at different times, and if (a) the target PCell id in the first RLF report and the PCell id in the second RLF report are the same, and (b) the C-RNTI used in the target PCell in the first RLF report and the C-RNTI used in the PCell in the second RLF report are the same, the network can determine that the messages are in the context of a “Case 8” scenario.
[0218] Alternatively, if (a) the target PSCell id in the first RLF report and the PSCell id in the second RLF report are the same, and (b) the C-RNTI used in the target PSCell in the first RLF report and the C-RNTI used in the PSCell in the second RLF report are the same, the network determines that a “Case 8” scenario is happening.
[0219] Alternatively, if the PCell or PSCell id that provides the CHO with SCG configuration and the Reconfig id are the same in the first RLF report and the second RLF report, the network determines that “Case 8” is happening.
[0220] Case 9 PSCell addition or change is successful; subsequently, a radio link failure is detected in the PSCell; the PCell change (handover) is successful; subsequently, a radio link failure is detected in the PCell
[0221] In this case, when the UE performs a CHO with candidate SCGs, both the RLF report due to the radio link failure in the MCG ( “the first RLF report” ) and the RLF report due to the radio link failure in the SCG ( “the second RLF report” ) are triggered, but they may not necessarily be transmitted to the network at the same time. In order to inform the network that the first RLF report and the second RLF report are associated with the same event, the following embodiments can be implemented.
[0222] In some embodiments, the first RLF report includes an identifier (id) that associates the first RLF report to the second RLF report. The identifier, for example, provides an indication (and / or information) of an association (or relationship) between the first RLF report and the second RLF report. In this example, the identifier can be at least one of the following:
[0223] –the PCell id and / or C-RNTI used in the PCell upon detecting the first RLF
[0224] –the PSCell id and / or C-RNTI used in the PSCell when the first RLF is detected
[0225] –the Reconfig id associated with condReconfigId for the selected cell (s) of conditional reconfiguration execution
[0226] –the PCell or PSCell id that provides the CHO with SCG configuration
[0227] –the indication of whether SN or MN provides the CHO with SCG configuration
[0228] Herein, condReconfigId is included in an RRC configuration message, and can be associated to a candidate PSCell and / or candidate PCell in a CHO with SCG configuration
[0229] In some embodiments, the first RLF report (upon including an identifier and / or being associated with an identifier) includes a cause value that indicates the first RLF report was triggered due to a radio link failure.
[0230] In some embodiments, the second RLF report includes an identifier (id) that associates the second RLF report to the first RLF report. The identifier, for example, provides an indication (and / or information) of an association (or relationship) between the second RLF report and the first RLF report. In this example, the identifier can be at least one of the following:
[0231] –the PCell id and / or C-RNTI used in the PCell upon detecting the second RLF
[0232] –the PSCell id and / or C-RNTI used in PSCell when the second RLF is detected
[0233] –the PSCell id and / or C-RNTI used in the PSCell before executing the last reconfiguration with synchronization
[0234] –the PCell id and / or C-RNTI used in the PCell before executing the last reconfiguration with synchronization
[0235] –the Reconfig id associated with condReconfigId for the selected cell (s) of conditional reconfiguration execution
[0236] –the PCell or PSCell id that provides the CHO with SCG configuration
[0237] –the indication of whether SN or MN provides the CHO with SCG configuration
[0238] Herein, condReconfigId is included in an RRC configuration message, and can be associated to a candidate PSCell and / or candidate PCell in a CHO with SCG configuration.
[0239] In some embodiments, the second RLF report (upon including an identifier and / or being associated with an identifier) includes a cause value that indicates the second RLF report was triggered due to a radio link failure.
[0240] In these embodiments, the network acquires the first RLF report and the second RLF report at different times, and if (a) the PCell id in the first RLF report and the PCell id in the second RLF report are the same, and (b) the C-RNTI used in the PCell in the first RLF report and the C-RNTI used in the PCell in the second RLF report are the same, the network can determine that the messages are in the context of a “Case 9” scenario.
[0241] Alternatively, if (a) the PSCell id in the first RLF report and the PSCell id in the second RLF report are the same, and (b) the C-RNTI used in the PSCell in the first RLF report and the C-RNTI used in the PSCell in the second RLF report are the same, the network determines that a “Case 9” scenario is happening.
[0242] Alternatively, if the PCell or PSCell id that provides the CHO with SCG configuration and the Reconfig id are the same in the first RLF report and the second RLF report, the network determines that “Case 9” is happening.
[0243] In some embodiments, both the first RLF report and the second RLF report include the same identifier (id) , which reciprocally associates the first RLF report and the second RLF report to each other. In some examples, the identifier can be a random number within a configured range. Herein, each random number is associated to a CHO with or without an SCG executing event. Alternatively, each random number is associated to a pair of C-RNTI used in the PCell and the C-RNTI used in the PSCell. In these examples, if the network acquires the first RLF report and the second RLF report, and the identifier (id) in the first RLF report and the second RLF report are the same, the network can determine that the messages are in the context of a “Case 9” scenario.
[0244] 2.2 CHO with candidate SCGs is not triggered
[0245] The two possible cases when CHO with candidate SCGs can be configured, but not triggered are discussed in this section.
[0246] Case 1 RLF detected in PCell, and then RLF detected in PSCell
[0247] In this case, an RLF report is triggered when a radio link failure is detected in the PCell. Subsequently, when a radio link failure is detected in the PSCell, since the MN is not available, the SCG failure report cannot be sent to the MN at that time, i.e., the UE can store the SCG failure report, and must wait until it connects to the network again before attempting its transmission again. Thus, the network acquires, from the UE, the RLF report and the SCG failure report at different times.
[0248] In some embodiments, the RLF report includes an identifier (id) that associates the RLF report to the SCG failure report. The identifier, for example, provides an indication (and / or information) of an association (or relationship) between the RLF report and the SCG failure report. In this example, the identifier can be at least one of the following:
[0249] –the PCell id and / or C-RNTI used in the PCell upon detecting an RLF
[0250] –the PSCell id and / or C-RNTI used in the PSCell when an RLF is detected In some embodiments, the SCG failure report includes an identifier (id) that associates the SCG failure report to the RLF report. The identifier, for example, provides an indication (and / or information) of an association (or relationship) between the SCG failure report and the RLF report. In this example, the identifier can be at least one of the following:
[0251] –the PCell id and / or C-RNTI used in the PCell upon detecting an RLF
[0252] –the PSCell id and / or C-RNTI used in the PSCell when an RLF is detected
[0253] In some embodiments, the RLF report (upon including an identifier and / or being associated with an identifier) includes a cause value that indicates the RLF report was triggered due to a radio link failure.
[0254] In these embodiments, if the network acquires the RLF report and SCG failure report at different times, and if (a) the PCell id and / or the C-RNTI used in the PCell in the SCG failure report and (b) the PCell id and / or the C-RNTI used in the PCell in the RLF report are the same, the network can determine that the messages are in the context of a “Case 1” scenario.
[0255] Alternatively, if (a) the PSCell id and / or the C-RNTI used in the PSCell in the SCG failure report and (b) the PSCell id and / or the C-RNTI used in the PSCell in the RLF report are the same, the network determines that a “Case 1” scenario is happening.
[0256] In some embodiments, both the RLF report and the SCG failure report include the same identifier (id) , which reciprocally associates the RLF report and the SCG failure report to each other. In some examples, the identifier can be a random number within a configured range. Herein, each random number is associated to a pair of C-RNTI used in the PCell and the C-RNTI used in the PSCell. In these examples, if the network acquires the RLF report and the SCG failure report, and the identifier (id) in the RLF report and the SCG failure report are the same, the network can determine that a “Case 1” scenario is happening.
[0257] Case 2 RLF detected in PSCell, and then RLF detected in PCell
[0258] In this case, the SCG failure report is triggered when RLF is detected in PSCell. Since the MN may be available when the RLF is detected in PSCell, the SCG failure report can be sent to the MN at that time, and the network can store this SCG failure report for analysis, and any subsequent optimization of the network configuration.
[0259] 3 Example scenarios for subsequent CPAC
[0260] A subsequent Conditional PSCell Addition or Change (subsequent CPAC) is defined as a conditional PSCell addition or change procedure that is executed after a PSCell addition, a PSCell change, a PCell change, or an SCG release based on a pre-configured subsequent CPAC configuration of candidate PSCell (s) without reconfiguration and re-initiation of CPC / CPA. In other words, the UE maintains the configured subsequent CPAC configuration (unless the network indicates to release it) and evaluates the execution conditions of candidate PSCells after completion of a PSCell addition, a PSCell change, a PCell change, or an SCG release. An intra-SN subsequent CPAC is initiated by the SN, an inter-SN subsequent CPAC can be initiated by either the MN or the SN. In the described embodiments, the UE is configured to continue performing CPAC (e.g., a multiple number of times) after initially acquiring the subsequent CPAC configuration once.
[0261] Existing system implementations adopt self-optimization to detect CPAC failures that occur due to too late CPC execution, too early CPC / CPA execution, or CPC / CPA execution to the wrong PSCell. When the CPAC failure or RLF happens, the UE can report the failure information to the network via a SCGFailureInformation message. Then the MN or SN can use the SCG Failure Information Report for root cause analysis. In some examples, an SPR can be triggered for the CPAC as well.
[0262] Due to the nature of a subsequent CPAC, the PSCell automatically changes from a first PSCell to a second PSCell in a group of candidate SCGs (and with each SCG including multiple PSCell) , while the MCG stays the same (in lower frequency band, e.g., 3.5 GHz or even 700 MHz) . In these scenarios, the network benefits by configuring one UE with a pool of SCGs, and automating other aspects of this procedure.
[0263] If a subsequent CPAC is configured for a UE, various reports might need to be generated more frequently. More frequently generated success reports may include one or more suboptimal success reports, which may be overwritten if the network is not configured to fetch the more frequently generated reports (e.g., its period was set to a longer value) . This would result in the network being unaware of suboptimal performance during a successful handover or cell switch.
[0264] Existing implementations allow the UE to perform a PSCell change based on its own set of configured conditions being fulfilled. However, if the UE is located in the cell edge of more than two cells, the ping-pong effect may occur (e.g., the mobile phone starts switching rapidly between two different cells in a short period of time) . To mitigate the ability of the UE to frequently perform PSCell addition or change on its own, the disclosed embodiments provide technical solutions that enable the network to configure different execution conditions with different thresholds for the measurement event. These technical solutions can be implemented as described in the following embodiments.
[0265] In some embodiments, when a radio link failure is detected for the SCG, the UE sends the following to the network: one or more PSCell id for which the execution conditions are fulfilled when executing the last reconfiguration with synchronization.
[0266] In some embodiments, when SPR is triggered, the UE sends the following information to the network: one or more PSCell id for which the execution conditions are fulfilled when executing the last reconfiguration with synchronization.
[0267] In some embodiments, when PSCell addition or change is performed, the UE sends the following information to the network: one or more PSCell id for which the execution conditions are fulfilled when executing the PSCell addition or change.
[0268] 4 Example embodiments and implementations of the disclosed technology
[0269] In the embodiments described below, the network (or network node) determines CHO and CPAC configurations and / or the current state of the UE (or wireless device) by transmitting an RRC message, UEInformationRequest, to retrieve this information from the UE.
[0270] In some example embodiments, the UE is configured to:
[0271] Step 1. Receive, from the network, UEInformationRequest message Step 2. Transmit, based on rlf-ReportReq being set to true in the UEInformationRequest and the UE having radio link failure information or handover failure information available, the RLF report in the UEInformationResponse message. The RLF report includes an identifier (id) that associates the RLF report to either SCG failure report or SPR. The identifier, for example, provides an indication (and / or information) of an association (or relationship) between the RLF report and either the SCG failure report or the SPR. In this example, the identifier can be at least one of the following:
[0272] –the target PCell id and / or C-RNTI used in the target PCell
[0273] –the target PSCell id and / or C-RNTI used in the target PSCell
[0274] –the source PCell id and / or C-RNTI used in the source PCell
[0275] –the source PSCell id and / or C-RNTI used in the source PSCell
[0276] –the PCell id and / or C-RNTI used in the PCell upon detecting an RLF
[0277] –the PSCell id and / or C-RNTI used in the PSCell when an RLF is detected
[0278] –the PSCell id and / or C-RNTI used in the PSCell before executing the last reconfiguration with synchronization
[0279] –the PCell id and / or C-RNTI used in the PCell before executing the last reconfiguration with synchronization
[0280] –the Reconfig id associated with condReconfigId for the selected cell (s) of conditional reconfiguration execution
[0281] –the PCell or PSCell id that provides the CHO with SCG configuration
[0282] –the indication of whether SN or MN provides the CHO with SCG configuration
[0283] –an identifier (id) that associates to a CHO with or without SCG executing event
[0284] –an identifier (id) that associates to a pair of C-RNTI used in the PCell and C-RNTI used in the PSCell.
[0285] Herein, condReconfigId is included in an RRC configuration message, and can be associated to a candidate PSCell and / or candidate PCell in a CHO with SCG configuration. Also, the identifier can be a random number within a configured range.
[0286] In some example embodiments, the UE is configured to:
[0287] Step 1. Receive, from the network, UEInformationRequest message
[0288] Step 2. Transmit, based on SCG-rlf-ReportReq being set to true in the UEInformationRequest and the UE having radio link failure information on the PSCell or having PSCell addition or change failure information available, the SCG failure report in the UEInformationResponse message. The SCG failure report includes an identifier (id) that associates the SCG failure report to either the RLF report or the SHR. The identifier, for example, provides an indication (and / or information) of an association (or relationship) between the SCG failure report and either the RLF report or the SHR. In this example, the identifier can be at least one of the following:
[0289] –the target PCell id and / or C-RNTI used in the target PCell
[0290] –the target PSCell id and / or C-RNTI used in the target PSCell
[0291] –the source PCell id and / or C-RNTI used in the source PCell
[0292] –the source PSCell id and / or C-RNTI used in the source PSCell
[0293] –the PCell id and / or C-RNTI used in the PCell upon detecting an RLF
[0294] –the PSCell id and / or C-RNTI used in the PSCell when an RLF is detected
[0295] –the Reconfig id associated with condReconfigId for the selected cell (s) of conditional reconfiguration execution
[0296] –the PCell or PSCell id that provides the CHO with SCG configuration
[0297] –the indication of whether SN or MN provides the CHO with SCG configuration
[0298] –an identifier (id) that associates to a CHO with or without SCG executing event
[0299] –an identifier (id) that associates to a pair of C-RNTI used in the PCell and C-RNTI used in the PSCell.
[0300] Herein, condReconfigId is included in an RRC configuration message, and can be associated to a candidate PSCell and / or candidate PCell in a CHO with SCG configuration. In some examples, the SCG failure report can also include one or PSCell id for which the execution conditions are fulfilled when executing the last reconfiguration with synchronization. In other examples, the identifier (id) can be a random number within a configured range.
[0301] In some example embodiments, the UE is configured to:
[0302] Step 1. Receive, from the network, UEInformationRequest message Step 2. Transmit, based on SPR-ReportReq being set to true in the UEInformationRequest and the UE having successful PSCell addition or change information available in VarSuccessPSCell-Report, the SPR in the UEInformationResponse message. The SPR includes an identifier (id) that associates the SPR to either RLF report or SHR. The identifier, for example, provides an indication (and / or information) of an association (or relationship) between the SPR and either the RLF report or the SHR. In this example, the identifier can be at least one of the following:
[0303] –the target PCell id and / or C-RNTI assigned by the target PCell of the handover
[0304] –the target PCell id and / or C-RNTI assigned by the target PSCell of the handover
[0305] –the source PCell id and / or C-RNTI used in the source PCell
[0306] –the source PSCell id and / or C-RNTI used in the source PSCell
[0307] –the Reconfig id associated with condReconfigId for the selected cell (s) of conditional reconfiguration execution
[0308] –the PCell or PSCell id that provides the CHO with SCG configuration
[0309] –the indication of whether SN or MN provides the CHO with SCG configuration
[0310] –an identifier (id) that associates to a CHO with or without SCG executing event
[0311] –an identifier (id) that associates to a pair of C-RNTI used in the PCell and C-RNTI used in the PSCell.
[0312] Herein, condReconfigId is included in an RRC configuration message, and can be associated to a candidate PSCell and / or candidate PCell in a CHO with SCG configuration. Also, the identifier (id) can be a random number within a configured range. In addition, the target PCell is the target MN cell of the CHO with SCGs, and the target PSCell is the target SN cell of the CHO with SCGs. In some examples, the SPR can also include:
[0313] –one or more PSCell id for which the execution conditions are fulfilled when executing the reconfiguration with synchronization, or
[0314] –one or more PSCell id for which the execution conditions are fulfilled when executing the PSCell addition or change.
[0315] In some example embodiments, the UE is configured to:
[0316] Step 1. Receive, from the network, UEInformationRequest message
[0317] Step 2. Transmit, based on SHR-ReportReq being set to true in theUEInformationRequest and the UE having successful handover information available, the SHR in the UEInformationResponse message. The SHR includes an identifier (id) that associates the SHR to either SCG failure report or SPR. The identifier, for example, provides an indication (and / or information) of an association (or relationship) between the RLF report and either the SCG failure report or the SPR. In this example, the identifier can be at least one of the following:
[0318] –the target PCell id and / or C-RNTI assigned by the target PCell of the handover
[0319] –the target PCell id and / or C-RNTI assigned by the target PSCell of the handover
[0320] –the source PCell id and / or C-RNTI used in the source PCell
[0321] –the source PSCell id and / or C-RNTI used in the source PSCell
[0322] –the Reconfig id associated with condReconfigId for the selected cell (s) of conditional reconfiguration execution
[0323] –the PCell or PSCell id that provides the CHO with SCG configuration
[0324] –the indication of whether SN or MN provides the CHO with SCG configuration
[0325] –an identifier (id) that associates to a CHO with or without SCG executing event
[0326] –an identifier (id) that associates to a pair of C-RNTI used in the PCell and C-RNTI used in the PSCell.
[0327] Herein, condReconfigId is included in an RRC configuration message, and can be associated to a candidate PSCell and / or candidate PCell in a CHO with SCG configuration. Also, the identifier (id) can be a random number within a configured range. In addition, the target PCell is the target MN cell of the CHO with SCGs, and the target PSCell is the target SN cell of the CHO with SCGs.
[0328] FIG. 2 shows a flowchart for an example wireless communication method 200. The method 200 includes, at operation 210, receiving, by a wireless device from a network node, an information request message.
[0329] The method 200 includes, at operation 220, transmitting, by the wireless device to the network node in response to the information request message, an information response message comprising a first report corresponding to a first network event. In this example wireless communication method 200, the first report includes an identifier associated with a second report corresponding to a second network event, and the information response message is transmitted upon determining that a reporting flag is set to true and that information associated with the first network event is available.
[0330] FIG. 3 shows a flowchart for an example wireless communication method 300. The method 300 includes, at operation 310, transmitting, by a network node to a wireless device, an information request message.
[0331] The method 300 includes, at operation 320, receiving, by the network node from the wireless device subsequent to the transmitting, an information response message comprising a first report corresponding to a first network event. In this example wireless communication method 300, the first report includes an identifier associated with a second report corresponding to a second network event, and the wireless device is configured to transmit the information response message upon determining that a reporting flag is set to true and that information associated with the first network event is available.
[0332] FIG. 4 shows a flowchart for an example wireless communication method 400. The method 400 includes, at operation 410, transmitting, by a wireless device to a network node, a report in response to a network event. In this example wireless communication method 400, the network event includes at least one of (i) an addition or change of a primary cell of a secondary cell group (PSCell) being performed, (ii) the addition or change of the PSCell failing, (iii) a radio link failure being detected, or (iv) a report request being received from the network node. Furthermore, the report includes at least one of (i) one or more PSCell identifiers for which execution conditions are fulfilled when executing (a) a reconfiguration with synchronization or (b) the addition or change of the PSCell, or (ii) a reconfiguration identifier associated with a conditional reconfiguration identifier for which execution conditions are fulfilled when executing (a) the reconfiguration with synchronization or (b) the addition or change of the PSCell.
[0333] The described features can be implemented to further provide one or more of the following technical solutions:
[0334] 1. A wireless communication method, comprising: receiving, by a wireless device from a network node, an information request message; and transmitting, by the wireless device to the network node in response to the information request message, an information response message comprising a first report corresponding to a first network event, wherein the first report comprises an identifier associated with a second report corresponding to a second network event, wherein the information response message is transmitted upon determining that a reporting flag is set to true and that information associated with the first network event is available.
[0335] 2. A wireless communication method, comprising: transmitting, by a network node to a wireless device, an information request message; and receiving, by the network node from the wireless device subsequent to the transmitting, an information response message comprising a first report corresponding to a first network event, wherein the first report comprises an identifier associated with a second report corresponding to a second network event, wherein the wireless device is configured to transmit the information response message upon determining that a reporting flag is set to true and that information associated with the first network event is available.
[0336] 3. The method of solution 1 or 2, wherein the first network event comprises a radio link failure or a handover failure, and wherein the first report comprises a Radio Link Failure (RLF) report.
[0337] 4. The method of solution 3, wherein the second network event comprises a failure of a Secondary Cell Group (SCG) .
[0338] 5. The method of solution 3, wherein the second network event comprises a successful addition or change of a primary cell of a secondary cell group (PSCell) , and wherein the second report comprises a Successful PSCell change Report (SPR) .
[0339] 6. The method of any of solutions 3 to 5, wherein the identifier comprises at least one of: a primary cell of a master cell group (PCell) identifier and / or a Cell Radio Network Temporary Identifier (C RNTI) used in the PCell (a) upon detecting the radio link failure or (b) before executing a last reconfiguration with synchronization; a PSCell identifier and / or the C-RNTI used in the PSCell (a) upon detecting the radio link failure or (b) before executing the last reconfiguration with synchronization; a target PCell identifier and / or the C RNTI used in the target PCell; a target PSCell identifier and / or the C RNTI used in the target PSCell; a source PCell identifier and / or the C RNTI used in the source PCell; a source PSCell identifier and / or the C RNTI used in the source PSCell; a reconfiguration identifier associated with a conditional reconfiguration identifier for one or more selected cells for conditional reconfiguration execution; the PCell identifier or the PSCell identifier that provides a conditional handover (CHO) with a secondary cell group (SCG) configuration; an indication of whether a Secondary Node (SN) or a Master Node (MN) provides the CHO with the SCG configuration; an identifier that associates to a CHO with or without an SCG executing event; or an identifier that associates to a pair of C-RNTI used in the PCell and C-RNTI used in the PSCell.
[0340] 7. The method of solution 1 or 2, wherein the first network event comprises (a) a radio link failure for a primary cell of a secondary cell group (PSCell) or (b) a failure of a PSCell addition or change, and wherein the first report comprises a Secondary Cell Group (SCG) failure report.
[0341] 8. The method of solution 7, wherein the second network event comprises a radio link failure for a primary cell of a master cell group (PCell) , and wherein the second report comprises a Radio Link Failure (RLF) report.
[0342] 9. The method of solution 7, wherein the second network event comprises a successful handover, and wherein the second report comprises a Successful Handover Report (SHR) .
[0343] 10. The method of any of solutions 7 to 9, wherein the identifier comprises at least one of: a primary cell of a master cell group (PCell) identifier and / or a Cell Radio Network Temporary Identifier (C RNTI) used in the PCell (a) upon detecting the radio link failure or (b) before executing a last reconfiguration with synchronization; a PSCell identifier and / or the C-RNTI used in the PSCell (a) upon detecting the radio link failure or (b) before executing the last reconfiguration with synchronization; a target PCell identifier and / or the C RNTI used in the target PCell; a target PSCell identifier and / or the C RNTI used in the target PSCell; a source PCell identifier and / or the C RNTI used in the source PCell; a source PSCell identifier and / or the C RNTI used in the source PSCell; a reconfiguration identifier associated with a conditional reconfiguration identifier for one or more selected cells for conditional reconfiguration execution; the PCell identifier or the PSCell identifier that provides a conditional handover (CHO) with a secondary cell group (SCG) configuration; an indication of whether a Secondary Node (SN) or a Master Node (MN) provides the CHO with the SCG configuration; an identifier that associates to a CHO with or without an SCG executing event; or an identifier that associates to a pair of C-RNTI used in the PCell and C-RNTI used in the PSCell.
[0344] 11. The method of solution 1 or 2, wherein the first network event comprises an addition or change of a primary cell of a secondary cell group (PSCell) that is successful, and wherein the first report comprises a Successful PSCell change Report (SPR) .
[0345] 12. The method of solution 11, wherein the second network event comprises a successful handover, and wherein the second report comprises a Successful Handover Report (SHR) .
[0346] 13. The method of solution 11, wherein the second network event comprises a radio link failure or a handover failure, and wherein the second report comprises a Radio Link Failure (RLF) report.
[0347] 14. The method of any of solutions 11 to 13, wherein the identifier comprises at least one of: a target primary cell of a master cell group (PCell) identifier and / or a Cell Radio Network Temporary Identifier (C RNTI) assigned by the target PCell of a handover; the target PCell identifier and / or the C RNTI assigned by a target PSCell of the handover; a source PCell identifier and / or the C-RNTI used in the source PCell; a source PSCell identifier and / or the C-RNTI used in the source PSCell; a reconfiguration identifier associated with a conditional reconfiguration identifier for one or more selected cells for conditional reconfiguration execution; the PCell identifier or the PSCell identifier that provides a conditional handover (CHO) with a secondary cell group (SCG) configuration; an indication of whether a Secondary Node (SN) or a Master Node (MN) provides the CHO with the SCG configuration; an identifier that associates to a CHO with or without an SCG executing event; or an identifier that associates to a pair of C-RNTI used in the PCell and C-RNTI used in the PSCell.
[0348] 15. The method of solution 1 or 2, wherein the first network event comprises a successful handover, and wherein the first report comprises a Successful Handover Report (SHR) .
[0349] 16. The method of solution 15, wherein the second network event comprises an addition or change of a primary cell of a secondary cell group (PSCell) that is successful, and wherein the second report comprises a Successful PSCell change Report (SPR) .
[0350] 17. The method of solution 15, wherein the second network event comprises a failure of a PSCell addition or change, and wherein the second report comprises a Secondary Cell Group (SCG) failure report.
[0351] 18. The method of any of solutions 15 to 17, wherein the identifier comprises at least one of: a target primary cell of a master cell group (PCell) identifier and / or a Cell Radio Network Temporary Identifier (C RNTI) assigned by the target PCell of a handover; the target PCell identifier and / or the C RNTI assigned by a target PSCell of the handover; a source PCell identifier and / or the C-RNTI used in the source PCell; a source PSCell identifier and / or the C-RNTI used in the source PSCell; a reconfiguration identifier associated with a conditional reconfiguration identifier for one or more selected cells for conditional reconfiguration execution; the PCell identifier or the PSCell identifier that provides a conditional handover (CHO) with a secondary cell group (SCG) configuration; an indication of whether a Secondary Node (SN) or a Master Node (MN) provides the CHO with the SCG configuration; an identifier that associates to a CHO with or without an SCG executing event; or an identifier that associates to a pair of C-RNTI used in the PCell and C-RNTI used in the PSCell.
[0352] 19. A wireless communication method, comprising: transmitting, by a wireless device to a network node, a report in response to a network event, wherein the network event comprises at least one of: an addition or change of a primary cell of a secondary cell group (PSCell) being performed, the addition or change of the PSCell failing, a radio link failure being detected, or a report request being received from the network node, and wherein the report comprises at least one of: one or more PSCell identifiers for which execution conditions are fulfilled when executing (a) a reconfiguration with synchronization or (b) the addition or change of the PSCell, or a reconfiguration identifier associated with a conditional reconfiguration identifier for which execution conditions are fulfilled when executing (a) the reconfiguration with synchronization or (b) the addition or change of the PSCell.
[0353] 20. An apparatus for wireless communication comprising one or more processors, configured to implement the method recited in one or more of solutions 1 to 19.
[0354] 21. A non-transitory computer readable program storage medium having code stored thereon, the code, when executed by one or more processors, causing the one or more processors to implement the method recited in one or more of solutions 1 to 19.
[0355] FIG. 5 shows a block diagram of an example hardware platform 500 that may be a part of a network device (e.g., base station) or a communication device (e.g., a user equipment (UE) ) . The hardware platform 500 includes at least one processor 510 and a memory 505 having instructions stored thereupon. The instructions upon execution by the processor 510 configure the hardware platform 500 to perform the operations described in FIGS. 2–4, and in the various embodiments described in this patent document. The transmitter 515 transmits or sends information or data to another device. For example, a network device transmitter can send a message to a user equipment. The receiver 520 receives information or data transmitted or sent by another device. For example, a user equipment can receive a message from a network device.
[0356] The implementations as discussed above will apply to a wireless communication. FIG. 6 shows an example of a wireless communication system (e.g., a 5G or NR cellular network) that includes a base station 620 and one or more user equipment (UE) 611, 612 and 613. In some embodiments, the UEs access the BS (e.g., the network) using a communication link to the network (sometimes called uplink direction, as depicted by dashed arrows 631, 632, 633) , which then enables subsequent communication (e.g., shown in the direction from the network to the UEs, sometimes called downlink direction, shown by arrows 641, 642, 643) from the BS to the UEs. In some embodiments, the BS send information to the UEs (sometimes called downlink direction, as depicted by arrows 641, 642, 643) , which then enables subsequent communication (e.g., shown in the direction from the UEs to the BS, sometimes called uplink direction, shown by dashed arrows 631, 632, 633) from the UEs to the BS. The UE may be, for example, a smartphone, a tablet, a mobile computer, a machine to machine (M2M) device, an Internet of Things (IoT) device, and so on.
[0357] Some of the embodiments described herein are described in the general context of methods or processes, which may be implemented in one embodiment by a computer program product, embodied in a computer-readable medium, including computer-executable instructions, such as program code, executed by computers in networked environments. A computer-readable medium may include removable and non-removable storage devices including, but not limited to, Read Only Memory (ROM) , Random Access Memory (RAM) , compact discs (CDs) , digital versatile discs (DVD) , etc. Therefore, the computer-readable media can include a non-transitory storage media. Generally, program modules may include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. Computer-or processor-executable instructions, associated data structures, and program modules represent examples of program code for executing steps of the methods disclosed herein. The particular sequence of such executable instructions or associated data structures represents examples of corresponding acts for implementing the functions described in such steps or processes.
[0358] Some of the disclosed embodiments can be implemented as devices or modules using hardware circuits, software, or combinations thereof. For example, a hardware circuit implementation can include discrete analog and / or digital components that are, for example, integrated as part of a printed circuit board. Alternatively, or additionally, the disclosed components or modules can be implemented as an Application Specific Integrated Circuit (ASIC) and / or as a Field Programmable Gate Array (FPGA) device. Some implementations may additionally or alternatively include a digital signal processor (DSP) that is a specialized microprocessor with an architecture optimized for the operational needs of digital signal processing associated with the disclosed functionalities of this application. Similarly, the various components or sub-components within each module may be implemented in software, hardware or firmware. The connectivity between the modules and / or components within the modules may be provided using any one of the connectivity methods and media that is known in the art, including, but not limited to, communications over the Internet, wired, or wireless networks using the appropriate protocols.
[0359] While this document contains many specifics, these should not be construed as limitations on the scope of an invention that is claimed or of what may be claimed, but rather as descriptions of features specific to particular embodiments. Certain features that are described in this document in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable sub-combination. Moreover, although features may be described above as acting in certain combinations and even initially claimed as such, one or more features from a claimed combination can in some cases be excised from the combination, and the claimed combination may be directed to a sub-combination or a variation of a sub-combination. Similarly, while operations are depicted in the drawings in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results.
[0360] Only a few implementations and examples are described and other implementations, enhancements and variations can be made based on what is described and illustrated in this disclosure.
Claims
1.A wireless communication method, comprising:receiving, by a wireless device from a network node, an information request message; andtransmitting, by the wireless device to the network node in response to the information request message, an information response message comprising a first report corresponding to a first network event, wherein the first report comprises an identifier associated with a second report corresponding to a second network event,wherein the information response message is transmitted upon determining that a reporting flag is set to true and that information associated with the first network event is available.2.A wireless communication method, comprising:transmitting, by a network node to a wireless device, an information request message; andreceiving, by the network node from the wireless device subsequent to the transmitting, an information response message comprising a first report corresponding to a first network event, wherein the first report comprises an identifier associated with a second report corresponding to a second network event,wherein the wireless device is configured to transmit the information response message upon determining that a reporting flag is set to true and that information associated with the first network event is available.3.The method of claim 1 or 2, wherein the first network event comprises a radio link failure or a handover failure, and wherein the first report comprises a Radio Link Failure (RLF) report.4.The method of claim 3, wherein the second network event comprises a failure of a Secondary Cell Group (SCG) .5.The method of claim 3, wherein the second network event comprises a successful addition or change of a primary cell of a secondary cell group (PSCell) , and wherein the second report comprises a Successful PSCell change Report (SPR) .6.The method of any of claims 3 to 5, wherein the identifier comprises at least one of:a primary cell of a master cell group (PCell) identifier and / or a Cell Radio Network Temporary Identifier (C-RNTI) used in the PCell (a) upon detecting the radio link failure or (b) before executing a last reconfiguration with synchronization;a PSCell identifier and / or the C-RNTI used in the PSCell (a) upon detecting the radio link failure or (b) before executing the last reconfiguration with synchronization;a target PCell identifier and / or the C-RNTI used in the target PCell;a target PSCell identifier and / or the C-RNTI used in the target PSCell;a source PCell identifier and / or the C-RNTI used in the source PCell;a source PSCell identifier and / or the C-RNTI used in the source PSCell;a reconfiguration identifier associated with a conditional reconfiguration identifier for one or more selected cells for conditional reconfiguration execution;the PCell identifier or the PSCell identifier that provides a conditional handover (CHO) with a secondary cell group (SCG) configuration;an indication of whether a Secondary Node (SN) or a Master Node (MN) provides the CHO with the SCG configuration;an identifier that associates to a CHO with or without an SCG executing event; oran identifier that associates to a pair of C-RNTI used in the PCell and C-RNTI used in the PSCell.7.The method of claim 1 or 2, wherein the first network event comprises (a) a radio link failure for a primary cell of a secondary cell group (PSCell) or (b) a failure of a PSCell addition or change, and wherein the first report comprises a Secondary Cell Group (SCG) failure report.8.The method of claim 7, wherein the second network event comprises a radio link failure for a primary cell of a master cell group (PCell) , and wherein the second report comprises a Radio Link Failure (RLF) report.9.The method of claim 7, wherein the second network event comprises a successful handover, and wherein the second report comprises a Successful Handover Report (SHR) .10.The method of any of claims 7 to 9, wherein the identifier comprises at least one of:a primary cell of a master cell group (PCell) identifier and / or a Cell Radio Network Temporary Identifier (C-RNTI) used in the PCell (a) upon detecting the radio link failure or (b) before executing a last reconfiguration with synchronization;a PSCell identifier and / or the C-RNTI used in the PSCell (a) upon detecting the radio link failure or (b) before executing the last reconfiguration with synchronization;a target PCell identifier and / or the C-RNTI used in the target PCell;a target PSCell identifier and / or the C-RNTI used in the target PSCell;a source PCell identifier and / or the C-RNTI used in the source PCell;a source PSCell identifier and / or the C-RNTI used in the source PSCell;a reconfiguration identifier associated with a conditional reconfiguration identifier for one or more selected cells for conditional reconfiguration execution;the PCell identifier or the PSCell identifier that provides a conditional handover (CHO) with a secondary cell group (SCG) configuration;an indication of whether a Secondary Node (SN) or a Master Node (MN) provides the CHO with the SCG configuration;an identifier that associates to a CHO with or without an SCG executing event; oran identifier that associates to a pair of C-RNTI used in the PCell and C-RNTI used in the PSCell.11.The method of claim 1 or 2, wherein the first network event comprises an addition or change of a primary cell of a secondary cell group (PSCell) that is successful, and wherein the first report comprises a Successful PSCell change Report (SPR) .12.The method of claim 11, wherein the second network event comprises a successful handover, and wherein the second report comprises a Successful Handover Report (SHR) .13.The method of claim 11, wherein the second network event comprises a radio link failure or a handover failure, and wherein the second report comprises a Radio Link Failure (RLF) report.14.The method of any of claims 11 to 13, wherein the identifier comprises at least one of:a target primary cell of a master cell group (PCell) identifier and / or a Cell Radio Network Temporary Identifier (C-RNTI) assigned by the target PCell of a handover;the target PCell identifier and / or the C-RNTI assigned by a target PSCell of the handover;a source PCell identifier and / or the C-RNTI used in the source PCell;a source PSCell identifier and / or the C-RNTI used in the source PSCell;a reconfiguration identifier associated with a conditional reconfiguration identifier for one or more selected cells for conditional reconfiguration execution;the PCell identifier or the PSCell identifier that provides a conditional handover (CHO) with a secondary cell group (SCG) configuration;an indication of whether a Secondary Node (SN) or a Master Node (MN) provides the CHO with the SCG configuration;an identifier that associates to a CHO with or without an SCG executing event; oran identifier that associates to a pair of C-RNTI used in the PCell and C-RNTI used in the PSCell.15.The method of claim 1 or 2, wherein the first network event comprises a successful handover, and wherein the first report comprises a Successful Handover Report (SHR) .16.The method of claim 15, wherein the second network event comprises an addition or change of a primary cell of a secondary cell group (PSCell) that is successful, and wherein the second report comprises a Successful PSCell change Report (SPR) .17.The method of claim 15, wherein the second network event comprises a failure of a PSCell addition or change, and wherein the second report comprises a Secondary Cell Group (SCG) failure report.18.The method of any of claims 15 to 17, wherein the identifier comprises at least one of:a target primary cell of a master cell group (PCell) identifier and / or a Cell Radio Network Temporary Identifier (C-RNTI) assigned by the target PCell of a handover;the target PCell identifier and / or the C-RNTI assigned by a target PSCell of the handover;a source PCell identifier and / or the C-RNTI used in the source PCell;a source PSCell identifier and / or the C-RNTI used in the source PSCell;a reconfiguration identifier associated with a conditional reconfiguration identifier for one or more selected cells for conditional reconfiguration execution;the PCell identifier or the PSCell identifier that provides a conditional handover (CHO) with a secondary cell group (SCG) configuration;an indication of whether a Secondary Node (SN) or a Master Node (MN) provides the CHO with the SCG configuration;an identifier that associates to a CHO with or without an SCG executing event; oran identifier that associates to a pair of C-RNTI used in the PCell and C-RNTI used in the PSCell.19.A wireless communication method, comprising:transmitting, by a wireless device to a network node, a report in response to a network event,wherein the network event comprises at least one of:an addition or change of a primary cell of a secondary cell group (PSCell) being performed,the addition or change of the PSCell failing,a radio link failure being detected, ora report request being received from the network node, andwherein the report comprises at least one of:one or more PSCell identifiers for which execution conditions are fulfilled when executing (a) a reconfiguration with synchronization or (b) the addition or change of the PSCell, ora reconfiguration identifier associated with a conditional reconfiguration identifier for which execution conditions are fulfilled when executing (a) the reconfiguration with synchronization or (b) the addition or change of the PSCell.20.An apparatus for wireless communication comprising one or more processors, configured to implement the method recited in one or more of claims 1 to 19.21.A non-transitory computer readable program storage medium having code stored thereon, the code, when executed by one or more processors, causing the one or more processors to implement the method recited in one or more of claims 1 to 19.
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