Method for detecting and escaping problem cell and user equipment

Abstract

A method for detecting a problematic cell and escaping from the problematic cell is provided. And establishing a connection with the Pcell. The frequency of occurrence at which no UL data packets, or no DL data packets, or no valid DL data packets, or target Scell or target SCG are repeatedly added and removed from the serving cell within the time window is detected above a predefined frequency. And determining that the Pcell is a problem cell. The problem cell is escaped by processing a new reconfiguration message from the problem cell, or by handover or redirection, or by UE triggered re-establishment or local release, or by modifying at least one measurement report to skip addition of the target Scell or the target SCG.

Description

[0001] Cross-referencing This application claims priority to U.S. Provisional Application No. 63 / 591,787, filed on October 20, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This invention relates to user equipment (UE), and more specifically, to a method and user equipment for detecting problematic cells and escaping such problematic cells. Background Technology

[0003] Energy saving is always a key consideration for mobile UEs. When a UE is in radio resource control (RRC) connection mode, it will use a lot of radio resources and consume a lot of power to maintain synchronization with the mobile network.

[0004] To reduce unnecessary waste of UE power and valuable radio resources, both the network and the UE will try to keep the UE in RRC idle / inactive mode for as long as possible. However, sometimes the network will not release the UE's RRC connection for an extended period of time, even if it is not necessary to keep the UE in RRC connected mode. Summary of the Invention

[0005] Embodiments of the present invention provide a method for detecting and escaping a problematic cell. The method includes the following steps: Establishing a connection with the primary cell (Pcell); Detecting that at least one condition is met within a time window. This condition includes no uplink (UL) data packets, no downlink (DL) data packets, no valid DL data packets, and a frequency higher than a predefined frequency in which a target secondary cell (Scell) or target secondary cell group (SCG) is repeatedly added to and removed from the serving cell. Thus, the Pcell can be determined to be a problematic cell. Escaping the problematic cell through at least one action. This action includes processing a new reconfiguration message from the problematic cell, a handover or redirection, a UE-triggered reconstruction or local release, and modifying at least one measurement report to skip adding the target Scell ​​or target SCG.

[0006] According to the above method, the step of escaping the problem cell by handling a new reconfiguration message from the problem cell comprises the following steps. Performing a handover in response to the new reconfiguration message comprising a handover command for the same radio access technology (RAT) or a different RAT. Alternatively, directly ignoring the new reconfiguration message in response to the new reconfiguration message comprising the handover command or no handover command, so that the problem cell releases a radio resource control (RRC) connection. Alternatively, treating the new reconfiguration message as an error or not supported in response to the new reconfiguration message comprising the handover command or no handover command, so that a UE triggered re-establishment is performed.

[0007] According to the above method, the step of escaping the problem cell by the handover or the redirection comprises the following steps. Triggering the handover or the redirection using A3 / A4 / A5 / B1 / B2 measurement reporting.

[0008] According to the above method, the step of escaping the problem cell by the handover or the redirection comprises the following steps. Triggering a configured A2 measurement report with Pcell radio results below a threshold and sending the A2 measurement report to the problem cell to trigger a RRC connection release, redirection to another cell, frequency or different RAT, or reconfiguration of A3 / A4 / A5 / B1 / B2 measurement reporting.

[0009] According to the above method, the step of triggering the handover or the redirection using A3 / A4 / A5 / B1 / B2 measurement reporting comprises the following steps. Faking Pcell radio results by setting them below a first reporting threshold. Alternatively, faking and presenting Pcell radio results as lower values. Alternatively, faking one or more target Scell neighbor cells by setting their radio results above a second reporting threshold. Alternatively, faking and presenting the radio results of the one or more target Scell neighbor cells as higher values. Alternatively, presenting and faking the radio results of the one or more target Scell neighbor cells in a different order in A3 / A4 / A5 / B1 / B2 measurement reporting.

[0010] According to the above method, the threshold comprises an A2 threshold.

[0011] According to the above method, the first reporting threshold comprises an A5 threshold_1 or a B2 threshold_1.

[0012] According to the above method, the second reporting threshold comprises an A4 threshold and an A5 threshold_1, or a B1 threshold and a B2 threshold_2.

[0013] According to the above method, the step of escaping the problem cell by UE triggered re-establishment or local release comprises the following steps. A configured A2 measurement report with Pcell radio results below a threshold is triggered and sent to the problem cell to trigger RRC connection release. Alternatively, UE triggered re-establishment or local release is performed at any time. Alternatively, the current serving cell is barred at a dedicated time to prevent it from camping on the problem cell again.

[0014] According to the above method, the step of escaping the problem cell by modifying at least one measurement report to skip adding the target Scell comprises the following steps. The target Scell is skipped in the measurement report. Alternatively, the target frequency where the target Scell is located is skipped in the measurement report. Alternatively, the target Scell is skipped in an A4 measurement report. Alternatively, the target frequency where the target Scell is located is skipped in an A4 measurement report.

[0015] According to the above method, the step of escaping the problem cell by modifying at least one measurement report to skip adding the target SCG comprises the following steps. The target SCG is skipped in the measurement report. Alternatively, the target frequency where the target SCG is located is skipped in the measurement report.

[0016] According to the above method, in a New Radio (NR) - NR Dual Connectivity (NNDC) case, the step of escaping the problem cell by modifying at least one measurement report to skip adding the target SCG comprises the following steps. The target SCG is skipped in at least one A3 measurement report. Alternatively, the target SCG is skipped in at least one A4 measurement report. Alternatively, the target SCG is skipped in at least one A5 measurement report.

[0017] According to the above method, in a NNDC case, the step of escaping the problem cell by modifying at least one measurement report to skip adding the target SCG comprises the following steps. The target frequency where the target SCG is located is skipped in at least one A3 measurement report. Alternatively, the target frequency where the target SCG is located is skipped in at least one A4 measurement report. Alternatively, the target frequency where the target SCG is located is skipped in at least one A5 measurement report.

[0018] According to the above method, in the case of E-UTRAN New Radio Dual Connectivity (ENDC) or New Radio E-UTRAN Dual Connectivity (NEDC), the step of escaping the problem cell by modifying at least one measurement report to skip adding the target SCG comprises the following steps. Skipping the target SCG in at least one B1 measurement report. Alternatively, skipping the target SCG in at least one B2 measurement report.

[0019] According to the above method, the step of escaping the problem cell by modifying at least one measurement report to skip adding the target SCG comprises the following steps. Skipping at least one B1 measurement report of a target frequency where the target SCG is located. Alternatively, skipping at least one B2 measurement report of a target frequency where the target SCG is located.

[0020] Embodiments of the present application also provide a user equipment (UE). The UE comprises a processor. The processor establishes a connection with a Pcell. The processor detects that at least one condition is met within a time window. The condition comprises no UL data packet, no DL data packet, no valid DL data packet, and a frequency of occurrence that a target Scell or a target SCG is repeatedly added and removed from a serving cell is higher than a predefined frequency. The processor determines that the Pcell is a problem cell. The processor escapes the problem cell by at least one action. The action comprises handling a new reconfiguration message from the problem cell, handover or redirection, UE triggered re-establishment or local release, and modifying at least one measurement report to skip adding the target Scell or the target SCG.

[0021] According to the above UE, the processor performs handover in response to the new reconfiguration message comprising a handover command for the same RAT or different RAT. Alternatively, the processor directly ignores the new reconfiguration message in response to the new reconfiguration message comprising the handover command or no handover command, so that the problem cell releases the RRC connection with the UE. Alternatively, the processor considers the new reconfiguration message as an error or not supported in response to the new reconfiguration message comprising the handover command or no handover command, so as to perform UE triggered re-establishment.

[0022] According to the above UE, the processor triggers the handover or the redirection using A3 / A4 / A5 / B1 / B2 measurement reports.

[0023] According to the above UE, the processor triggers a configured A2 measurement report with Pcell radio results below a threshold to trigger an RRC connection release, redirection to another cell, frequency or different RAT, or reconfiguration of A3 / A4 / A5 / B1 / B2 measurement reports to the problem cell.

[0024] According to the above UE, the processor fakes Pcell radio results by setting them below a first reporting threshold. Alternatively, the processor can fake the Pcell radio results and present them as lower values. Alternatively, the processor can fake one or more target Scell radio results by setting them above a second reporting threshold. Alternatively, the processor can fake the Scell radio results and present them as higher values. Alternatively, the processor can fake the Scell radio results and present them in a different order in the A3 / A4 / A5 / B1 / B2 measurement reports.

[0025] According to the above UE, the processor triggers a configured A2 measurement report with Pcell radio results below a threshold to trigger an RRC connection release to the problem cell. Alternatively, the processor can perform a UE triggered re-establishment or local release at any time. Alternatively, the processor can bar the current serving cell at a dedicated time to prevent it from camping on the problem cell again.

[0026] According to the above UE, the processor skips the target Scell in the measurement report. Alternatively, the processor can skip the measurement report for the target frequency in which the target Scell is located. Alternatively, the processor can skip the target Scell in the A4 measurement report. Alternatively, the processor can skip the A4 measurement report for the target frequency in which the target Scell is located.

[0027] According to the above UE, the processor skips the target SCG in the measurement report. Alternatively, the processor skips the measurement report for the target frequency in which the target SCG is located. BRIEF DESCRIPTION OF DRAWINGS

[0028] A more complete understanding of the present application can be attained by reading the following detailed description in conjunction with the accompanying drawings, in which: Figure 1 A flowchart of a method for detecting a problem cell and escaping the problem cell according to some embodiments of the application is shown; Figure 2 A detailed flowchart of some embodiments of step S106 in the method of Figure 1 Figure 3 A detailed flowchart of some embodiments of step S106 in the method of Figure 1 ​Detailed flowchart of some embodiments of step S106; Figure 4 shows a schematic diagram of a communication system 1000 according to some embodiments of the application. Figure 3 Flowchart of some embodiments of step S302; Figure 5 shows a schematic diagram of a communication system 1000 according to some embodiments of the application. Figure 1 Detailed flowchart of some embodiments of step S106; Figure 6 shows a schematic diagram of a communication system 1000 according to some embodiments of the application. Figure 1 Detailed flowchart of some embodiments of step S106; Figure 7 shows a schematic diagram of a communication system 1000 according to some embodiments of the application. Figure 1 Detailed flowchart of some embodiments of step S106; Figure 8 shows a schematic diagram of a communication system 1000 according to some embodiments of the application. Figure 7 Detailed flowchart of some embodiments of steps S700 and S702; Figure 9 shows a schematic diagram of a communication system 1000 according to some embodiments of the application. Figure 7 Detailed flowchart of some embodiments of steps S700 and S702; and Figure 10 shows a schematic diagram of a communication system 1000 according to some embodiments of the application. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned purposes, features and advantages of some embodiments of the application more easy to understand, the following will be described in detail with reference to the accompanying drawings.

[0030] Throughout the specification and the following claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, electronic manufacturers can refer to a component by different names. This document does not intend to distinguish between components that differ in name but not in function. In the description and in the following claims, "including" and "comprising" are used in an open-ended fashion, and thus should be interpreted to mean "including, but not limited to...". It will also be understood that "consisting of" is used to refer to the inclusions of something to the exclusion of something else in an open-ended fashion, thus, will be interpreted also to mean "including, but not limited to...". Accordingly, when the application uses "including", "having" or "comprising" to refer to a particular technical feature, numerical value, method step, operation, unit or component, it is stressed that additional technical features, numerical values, method steps, operations, units, components, or any combination of the above can also be present.

[0031] The directional terms used throughout the specification and the following claims, such as "upper", "upper", "lower", "lower", "front", "back", "back", "left", "right", etc., are only relative to the direction of the drawings. Therefore, the directional terms are used for explanation, not for limitation of the present application. With regard to the drawings, the drawings show the general features of the method, structure or material used in a particular embodiment. However, the drawings should not be interpreted as defining or limiting the scope or properties contained in these embodiments. For example, the relative size, thickness and position of each layer, each region or each structure may be reduced or enlarged for clarity.

[0032] When referring to a corresponding component such as a layer or region "on" another component, it can be directly on the other component, or there can be other components between them. On the other hand, when a component is referred to as "directly on" another component (or variants thereof), there is no component between them. In addition, when a corresponding component is referred to as "on" another component, the corresponding component and the other component have a top view / vertical arrangement, the corresponding component can be below or above the other component, and the top view / vertical arrangement is determined by the direction of the device.

[0033] It should be understood that when a component or layer is referred to as "connected to" another component or layer, it can be directly connected to the other component or layer, or there can be intermediate components or layers. In contrast, when a component is referred to as "directly connected to" another component or layer, there is no intermediate component or layer.

[0034] The electronic connection or coupling described in the present application can refer to direct connection or indirect connection. In the case of direct connection, the end points of the components on the two circuits are directly connected or connected through a wire segment, while in the case of indirect connection, there can be switches, diodes, capacitors, inductors, resistors, other suitable components or combinations of the above components between the end points of the components on the two circuits, but the intermediate components are not limited to this.

[0035] The words "first", "second" and "third" are used to describe components. They are not used to indicate priority order or sequence, but only to distinguish components with the same name.

[0036] It should be noted that the technical features in the different embodiments described below can be replaced, recombined or mixed with each other to constitute another embodiment without deviating from the spirit of the present application.

[0037] Figure 1A flowchart of a method of detecting a problematic cell and escaping from the problematic cell according to some embodiments of the present application is shown. In some embodiments, the method of detecting a problematic cell and escaping from the problematic cell of the present application is applied to a UE, such as a smartphone, a tablet or a laptop, but the present application is not limited thereto. The method of detecting a problematic cell and escaping from the problematic cell of the present application comprises the following steps. A connection is established with a Pcell (step S100). It is detected that at least one condition is met within a time window. The conditions include no UL data packets, no DL data packets, no valid DL data packets, and a frequency of occurrence of a target Scell or a target SCG being repeatedly added and removed from a serving cell is higher than a predefined frequency (step S102). It is determined that the Pcell is a problematic cell (step S104). The UE escapes from the problematic cell by at least one action. The actions include handling a new reconfiguration message from the problematic cell, a handover or redirection, a UE triggered re-establishment or a local release, and modifying at least one measurement report to skip adding the target Scell or the target SCG (step S106). In some embodiments, steps S100, S102 and S104 are steps of detecting a problematic cell. Step S106 is a step of escaping from a problematic cell.

[0038] In step S100, the serving cell includes the Pcell. In addition, the serving cell can also include other Scells or other SCGs, but the present application is not limited thereto. In step S102, the conditions for the UE to determine that the Pcell is a problematic cell can include at least one of the following conditions. For example, the UE detects that there are no UL data packets within a time window Tu. The time window Tu is used to monitor the UE UL data transmission. Alternatively, the UE detects that there are no DL data packets within a time window Td. The time window Td is used to monitor the UE DL data transmission. Alternatively, the UE detects that there are no valid DL data packets within the time window Tu or Td. In some embodiments, the valid DL data packets are data packets specially sent to the UE, rather than broadcast data packets.

[0039] Alternatively, the UE detects that a target Scell is repeatedly added and removed from the serving cell within a time window Tr1 at a frequency of occurrence higher than a predefined frequency. For example, it is assumed that the predefined frequency is equal to x. When the number of times that the target Scell is repeatedly added and removed is higher than x within the time window Tr1, the UE determines that the Pcell is a problematic cell. Fifth, the UE detects that a target SCG is repeatedly added and removed from the serving cell within a time window Tr2 at a frequency of occurrence higher than a predefined frequency. For example, it is assumed that the predefined frequency of occurrence is equal to y. When the number of times that the target SCG is repeatedly added and removed is higher than y within the time window Tr2, the UE determines that the Pcell is a problematic cell.

[0040] In step S106, the method of escaping the problem cell can comprise at least one of the following steps. For example, the UE escapes the problem cell by specifically handling a new reconfiguration message from the problem cell. Alternatively, the UE escapes the problem cell by handover or redirection. Alternatively, the UE escapes the problem cell by UE triggered re-establishment or local release. Alternatively, the UE escapes the problem cell by modifying at least one measurement report to skip adding a target Scell. Alternatively, the UE escapes the problem cell by modifying at least one measurement report to skip adding a target SCG.

[0041] Figure 2 A detailed flowchart of step S106 in the method of detecting and escaping a problem cell according to some embodiments of the present application is shown. Figure 1 In particular, Figure 2 A detailed flowchart of step S106 in the method of detecting and escaping a problem cell according to some embodiments of the present application is shown. Figure 1 A detailed flowchart of step S106 in the method of escaping the problem cell by handling a new reconfiguration message from the problem cell is shown. As shown, Figure 2 The method of detecting and escaping a problem cell according to some embodiments of the present application comprises at least one of the following steps. A handover is performed in response to a new reconfiguration message comprising a handover command for the same RAT or a different RAT (step S200). Alternatively, the new reconfiguration message is directly ignored in response to a new reconfiguration message comprising a handover command or no handover command, so that the problem cell releases the RRC connection (step S202). Alternatively, the new reconfiguration message is treated as an error or not supported in response to a new reconfiguration message comprising a handover command or no handover command, so that a UE triggered re-establishment is performed according to 3GPP specification (step S204). That is, any one of steps S200 to S204 can be performed independently.

[0042] Figure 3 A detailed flowchart of step S106 in the method of detecting and escaping a problem cell according to some embodiments of the present application is shown. Figure 1 In particular, Figure 3 A detailed flowchart of step S106 in the method of detecting and escaping a problem cell according to some embodiments of the present application is shown. Figure 1 A detailed flowchart of step S106 in the method of escaping the problem cell by handover or redirection is shown. As shown, Figure 3 The method of detecting and escaping a problem cell according to some embodiments of the present application comprises the following steps. A configured A2 measurement report with Pcell radio results below a threshold is triggered and sent to the problem cell to trigger RRC connection release, redirection to another cell, frequency or a different RAT, or reconfigure A3 / A4 / A5 / B1 / B2 measurement report (step S300). A handover or redirection is triggered using A3 / A4 / A5 / B1 / B2 measurement report (step S302). In some embodiments, step S300 can be optional, but the present application is not limited thereto. In some embodiments, the threshold in step S300 can be an A2 threshold, but the present application is not limited thereto.

[0043] Figure 4 Some embodiments of the present invention are shown. Figure 3 Flowchart of step S302. Figure 4 This illustration demonstrates how the method for detecting and escaping problematic cells according to the present invention triggers handover or redirection using A3 / A4 / A5 / B1 / B2 measurement reports. The method for detecting and escaping problematic cells according to the present invention includes at least one of the following steps: Falsifying the Pcell radio result by setting it below a first reporting threshold (step S400). Alternatively, falsifying the Pcell radio result to a lower value (step S402). Alternatively, falsifying the radio results of one or more target Scell ​​neighboring cells by setting their radio results above a second reporting threshold (step S404). Alternatively, falsifying the radio results of one or more target Scell ​​neighboring cells to a higher value (step S406). Alternatively, presenting and falsifying the radio results of target Scell ​​neighboring cells in different orders in the A3 / A4 / A5 / B1 / B2 measurement reports (step S408). That is, any one of steps S400 to S408 can be performed independently. In some embodiments, the first reporting threshold in step S400 may include A5 threshold_1 or B2 threshold_1. The second reporting threshold in step S404 may include threshold A4 and threshold A5_1, or threshold B1 and threshold B2_2.

[0044] Figure 5 Some embodiments according to the present invention are shown. Figure 1 A detailed flowchart of step S106. Specifically, Figure 5 It shows Figure 1 A detailed flowchart of the UE-triggered reconstruction or local release to escape the problematic cell in step S106. Figure 5 As shown, the method for detecting and escaping a problematic cell according to the present invention includes at least one of the following steps: Triggering an A2 measurement report with a Pcell radio result below a threshold and sending it to the problematic cell to initiate an RRC connection release (step S500). Alternatively, a UE-triggered reconstruction or local release can be performed at any time (step S502). Alternatively, the currently serving cell is disabled during a dedicated time to prevent it from re-camping in the problematic cell (step S504). That is, any one of steps S500 to S504 can be performed independently. In some embodiments, the method for detecting and escaping a problematic cell according to the present invention further triggers early departure of any cell by reconstructing or falsifying A2 / A3 / A4 / A5 / B1 / B2 measurement reports.

[0045] Figure 6 Some embodiments according to the present invention are shown. Figure 1 A detailed flowchart of step S106. Specifically, Figure 6 It shows Figure 1 The detailed flowchart in step S106, which involves modifying at least one measurement report to skip adding the target Scell ​​and escape the problem cell, is as follows. Figure 6 As shown, the method for detecting and escaping problematic cells according to the present invention includes at least one of the following steps: Skipping the target Scell ​​in the measurement report (step S600). Alternatively, skipping the measurement report of the target frequency where the target Scell ​​is located (step S602). Alternatively, skipping the target Scell ​​in the A4 measurement report (step S604). Alternatively, skipping the A4 measurement report of the target frequency where the target Scell ​​is located (step S606). That is, any one of steps S600 to S606 can be executed independently. In some embodiments, when the UE detects that the frequency of the target Scell ​​being repeatedly added and removed from the serving cell is higher than a predefined frequency (e.g., x times in time window Tr1), steps S600 to S606 are executed.

[0046] In some embodiments, when a measurement report is skipped, the method of detecting and escaping a problem cell according to the present invention includes not sending or deleting the measurement report. When a cell is skipped, the method of detecting and escaping a problem cell according to the present invention includes not sending the target cell in the measurement report, deleting the target cell, or changing the reporting order of the target cell. For example, when the UE reporting order is changed, the target cell or other neighboring cells are adjusted in the measurement report. In some embodiments, A3 / A4 / A5 / B1 / B2 measurement reports are sent to the network within 3 seconds before the Scell ​​or SCG is added.

[0047] Figure 7 Some embodiments according to the present invention are shown. Figure 1 A detailed flowchart of step S106. Specifically, Figure 7 It shows Figure 1 The detailed flowchart in step S106, which involves modifying at least one measurement report to skip adding a target SCG and escaping the problem cell, is as follows. Figure 7 As shown, the method for detecting and escaping problematic cells according to the present invention includes at least one of the following steps: Skipping the target SCG in the measurement report (step S700). Alternatively, skipping the measurement report of the target frequency where the target SCG is located (step S702). That is, either step S700 or S702 can be executed independently. In some embodiments, when the UE detects that the frequency of the target SCG being repeatedly added and removed from the serving cell in time window Tr2 is higher than a predefined frequency, steps S700 and S702 are executed.

[0048] Figure 8 Some embodiments according to the present invention are shown. Figure 7 Detailed flowcharts of steps S700 and S702 in the NNDC case. (See attached flowchart.) Figure 8 As shown, Figure 7 Step S700 includes at least one of the following steps: Skipping the target SCG in at least one A3 measurement report (step S800). Alternatively, skipping the target SCG in at least one A4 measurement report (step S802). Alternatively, skipping the target SCG in at least one A5 measurement report (step S804). That is, any one of steps S800 to S804 can be performed independently. Figure 7 Step S702 includes at least one of the following steps: Skipping at least one A3 measurement report for the target frequency where the target SCG is located (step S806). Alternatively, skipping at least one A4 measurement report for the target frequency where the target SCG is located (step S808). Alternatively, skipping at least one A5 measurement report for the target frequency where the target SCG is located (step S810). That is, any one of steps S806 to S810 can be performed independently.

[0049] Figure 9 Some embodiments according to the present invention are shown. Figure 7 Detailed flowcharts for steps S700 and S702 in the ENDC or NEDC scenarios. (See attached flowchart.) Figure 9 As shown, Figure 7 Step S700 includes at least one of the following steps: Skipping the target SCG in at least one B1 measurement report (step S900). Alternatively, skipping the target SCG in at least one B2 measurement report (step S902). Figure 7 Step S702 includes the following steps: Skip at least one B1 measurement report for the target frequency where the target SCG is located (step S904). Alternatively, skip at least one B2 measurement report for the target frequency where the target SCG is located (step S906). That is, any one of steps S900 to S906 can be performed independently.

[0050] Figure 10 A schematic diagram of a communication system 1000 according to some embodiments of the present invention is shown. For example... Figure 10As shown, the communication system 1000 includes a UE 1002, a network 1004, and a base station 1006. In some embodiments, the UE 1002 may be a laptop, tablet, or smartphone, but the invention is not limited thereto. In some embodiments, the UE 1002 can access the network 1004 through the base station 1006 to generate a serving cell. The serving cell includes at least one Pcell, but the invention is not limited thereto. The UE 1002 connects to the base station 1006 via RRC signaling, but the invention is not limited thereto. In some embodiments, the base station 1006 may be a gNB, but the invention is not limited thereto.

[0051] In some embodiments, UE 1002 includes an antenna 1012, a transceiver 1008, and a processor 1010. The transceiver 1008 is electrically connected between the antenna 1012 and the processor 1010. The processor 1010 may be a modem, but the invention is not limited thereto. In some embodiments, UE 1002 further includes a storage medium (not shown) storing a plurality of codes. The processor 1010 reads the codes stored in the storage medium to execute. Figure 1 Steps S100, S102, S104, and S106 in the process. In some embodiments, the processor 1010 via... Figure 2 In steps S200, S202, or S204, the processor 1010 processes the new reconfiguration message from the problem cell to escape the problem cell. In some embodiments, the processor 1010... Figure 3 In steps S300 and S302, a handover or redirection is performed to escape the problematic cell. In some embodiments, step S300 may be optional. In some embodiments, in order to escape the problematic cell by handover or redirection, the processor 1010 performs a handover or redirection... Figure 4 Steps S400, S402, S404, S406, or S408 in the process use A3 / A4 / A5 / B1 / B2 measurement reports to trigger switching or redirection.

[0052] In some embodiments, the processor 1010 via Figure 5In steps S500, S502, or S504, the UE-triggered reconstruction or local release is performed to escape the problem cell. In some embodiments, when the processor 1010 detects that the frequency of the target Scell ​​being repeatedly added and removed from the serving cell is higher than a predefined frequency, the processor 1010 modifies at least one measurement report to skip adding the target Scell ​​in steps S600, S602, S604, or S606 to escape the problem cell. In some embodiments, when the processor 1010 detects that the frequency of the target SCG being repeatedly added and removed from the serving cell is higher than a predefined frequency, the processor 1010 modifies at least one measurement report to skip adding the target SCG in step S700 or S702 to escape the problem cell.

[0053] In some embodiments under NNDC conditions, processor 1010 skips the target SCG in the measurement report via steps S800, S802, or S804. Processor 1010 skips the measurement report for the target frequency where the target SCG is located via steps S806, S808, or S810. In some embodiments under ENDC or NEDC conditions, processor 1010 skips the target SCG in the measurement report via steps S900 or S902. Processor 1010 skips the measurement report for the target frequency where the target SCG is located via steps S904 or S906.

[0054] In some embodiments, when a measurement report is skipped, the method for detecting and escaping problematic cells of the present invention, as well as UE 1002, do not send or delete the measurement report. When a cell (e.g., a target Scell ​​or a target SCG) is skipped, the method for detecting and escaping problematic cells of the present invention, as well as UE 1002, do not send, delete, or change the report order in the measurement report.

[0055] While the invention has been described by way of examples and preferred embodiments, it should be understood that the invention is not limited to the disclosed embodiments. Rather, it is intended to cover various modifications and similar arrangements (as would be understood by those skilled in the art). Therefore, the scope of the appended claims should be given the broadest interpretation to cover all such modifications and similar arrangements.

Claims

1. A method for detecting problematic cells and escaping from problematic cells, comprising: Establish connection with the main cell; The detection requires that at least one condition be met within the time window; The conditions include no uplink data packets, no downlink data packets, no valid downlink data packets, and the frequency of target secondary cells or target secondary cell groups being repeatedly added to and removed from the serving cell being higher than the predefined frequency. The main cell was identified as the problem cell; and Escape the problematic cell by taking at least one action; wherein the action includes processing a new reconfiguration message from the problematic cell, a handover or redirection, a user equipment-triggered rebuild or local release, and modifying at least one measurement report to skip adding the target secondary cell or the target secondary cell group.

2. The method of claim 1, wherein, The steps to escape a problematic cell by processing new reconfiguration messages from that cell include: A handover is performed in response to a new reconfiguration message including a handover command for the same or different radio access technologies; or In response to the new reconfiguration message, which includes the handover command or not, the new reconfiguration message is ignored to allow the problematic cell to release its radio resource control connection; or In response to a new reconfiguration message that includes or does not include the handover command, the new reconfiguration message is treated as an error or unsupported in order to perform a rebuild triggered by the user equipment.

3. The method as described in claim 1, wherein, The steps to escape the problematic cell via this handover or redirection include: Use A3 / A4 / A5 / B1 / B2 measurement reports to trigger the switch or redirection.

4. The method of claim 3, wherein, The steps to escape the problematic cell via this handover or redirection further include: Trigger an A2 measurement report with primary cell radio results below a threshold to trigger RRC connection release, redirection to another cell, frequency, or different radio access technology, or reconfigure the A3 / A4 / A5 / B1 / B2 measurement report.

5. The method of claim 3, wherein, The steps to trigger this switch or redirection using the A3 / A4 / A5 / B1 / B2 measurement report include: The primary cell radio result is falsified by setting it below the first reporting threshold; or To falsify the radio result of the main cell to a lower value; or The one or more target secondary cell neighboring cells are faked by setting the radio results of one or more target secondary cell neighboring cells to be higher than a second reporting threshold; or The radio result of the neighboring cells of one or more target secondary cells is falsified to a higher value; or The radio results of the one or more target secondary cell neighboring cells are falsified by presenting the radio results of the one or more target secondary cell neighboring cells in different orders in the A3 / A4 / A5 / B1 / B2 measurement report.

6. The method of claim 4, wherein, This threshold includes the A2 threshold.

7. The method of claim 5, wherein, The first reporting threshold includes either A5 threshold_1 or B2 threshold_1.

8. The method of claim 5, wherein, The second reporting threshold includes the A4 threshold and A5 threshold_1, or the B1 threshold and B2 threshold_2.

9. The method of claim 1, wherein, The steps to escape the problematic cell via a rebuild triggered by the user equipment or a local release include: Trigger an A2 measurement report with the primary cell's radio results below a threshold, and send the A2 measurement report to the problem cell to trigger a radio resource control connection release; or Perform a rebuild triggered by the user device or a local release at any time; or The currently serving cell is banned during designated times to prevent it from re-entering the problematic cell.

10. The method of claim 1, wherein, The steps to skip adding the target secondary cell and escape the problematic cell by modifying at least one measurement report include: Skip the target secondary cell in the measurement report; or Skip the measurement report for the target frequency where the target secondary cell is located; or Skip the target secondary cell in the A4 measurement report; or Skip the A4 measurement report for the target frequency where the target auxiliary cell is located.

11. The method of claim 1, wherein, The steps to escape a problem cell by modifying at least one measurement report to skip adding the target secondary cell group include: Skip the target secondary cell group in the measurement report; or Skip the measurement report for the target frequency where the target auxiliary cell group is located.

12. The method of claim 11, wherein, In the case of a new radio-to-new radio dual connection, the steps to escape the problem cell by modifying at least one measurement report to skip the addition of the target secondary cell group include: Skip the target secondary cell group in at least one A3 measurement report; or Skip the target secondary cell group in at least one A4 measurement report; or Skip the target secondary cell group in at least one A5 measurement report.

13. The method of claim 11, wherein, In the case of a new radio-to-new radio dual connection, the steps to escape the problem cell by modifying at least one measurement report to skip the addition of the target secondary cell group include: Skip at least one A3 measurement report for the target frequency where the target secondary cell group is located; or Skip at least one A4 measurement report for the target frequency where the target secondary cell group is located; or Skip at least one A5 measurement report for the target frequency where the target auxiliary cell group is located.

14. The method of claim 11, wherein, In the case of E-UTRAN new radio dual connectivity or new radio E-UTRAN dual connectivity, the steps to escape the problem cell by modifying at least one measurement report to skip adding the target secondary cell group include: Skip the target secondary cell group in at least one B1 measurement report; or Skip the target secondary cell group in at least one B2 measurement report.

15. The method of claim 11, wherein, In the case of E-UTRAN new radio dual connectivity or new radio E-UTRAN dual connectivity, the steps to escape the problem cell by modifying at least one measurement report to skip adding the target secondary cell group include: Skip at least the B1 measurement report for the target frequency where the target secondary cell group is located; or Skip one less B2 measurement report for the target frequency where the target auxiliary cell group is located.

16. A user equipment, comprising: The processor is configured as follows: Establish connection with the main cell; The detection requires that at least one condition be met within the time window; The conditions include no uplink data packets, no downlink data packets, no valid downlink data packets, and the frequency of target secondary cells or target secondary cell groups being repeatedly added to and removed from the serving cell being higher than the predefined frequency. The main cell was identified as the problem cell; and Escape the problematic cell by taking at least one action; wherein the action includes processing a new reconfiguration message from the problematic cell, a handover or redirection, a user equipment-triggered rebuild or local release, and modifying at least one measurement report to skip adding the target secondary cell or the target secondary cell group.

17. The user equipment as claimed in claim 16, wherein, The processor is configured as follows: A handover is performed in response to a new reconfiguration message including a handover command for the same or different radio access technologies; or In response to the new reconfiguration message, including or without the handover command, the new reconfiguration message is ignored to allow the problematic cell to release its radio resource control connection with the user equipment; or In response to a new reconfiguration message that includes or does not include the handover command, the new reconfiguration message is treated as an error or unsupported in order to perform a rebuild triggered by the user equipment.

18. The user equipment as claimed in claim 16, wherein, The processor is configured to trigger the switch or redirection using A3 / A4 / A5 / B1 / B2 measurement reports.

19. The user equipment as claimed in claim 18, wherein, The processor is configured as follows: Trigger an A2 measurement report with primary cell radio results below a threshold to trigger radio resource control connection release, redirection to other cells, frequencies, or different radio access technologies, or reconfigure the A3 / A4 / A5 / B1 / B2 measurement report.

20. The user equipment as claimed in claim 18, wherein, The processor is configured as follows: The primary cell radio result is falsified by setting it below the first reporting threshold; or To falsify the radio result of the main cell to a lower value; or The one or more target secondary cell neighboring cells are faked by setting the radio results of one or more target secondary cell neighboring cells to be higher than a second reporting threshold; or The radio result of the neighboring cells of one or more target secondary cells is falsified to a higher value; or The radio results of the one or more target secondary cell neighboring cells are falsified by presenting the radio results of the one or more target secondary cell neighboring cells in different orders in the A3 / A4 / A5 / B1 / B2 measurement report.

21. The user equipment as claimed in claim 16, wherein, The processor is configured as follows: Trigger an A2 measurement report with the primary cell's radio results below a threshold, and send the A2 measurement report to the problem cell to trigger a radio resource control connection release; or Perform a rebuild triggered by the user device or a local release at any time; or The currently serving cell is banned during designated times to prevent it from re-entering the problematic cell.

22. The user equipment as claimed in claim 16, wherein, The processor is configured as follows: Skip the target secondary cell in the measurement report; or Skip the measurement report for the target frequency where the target secondary cell is located; or Skip the target secondary cell in the A4 measurement report; or Skip the A4 measurement report for the target frequency where the target auxiliary cell is located.

23. The user equipment of claim 16, wherein the processor is configured to: Skip the target secondary cell group in the measurement report; or Skip the measurement report for the target frequency where the target auxiliary cell group is located.

Images