Method and apparatus used in communication node for wireless communication

Abstract

The present application discloses a method and apparatus used in a communication node for wireless communication. A communication node, in response to predicting a radio link failure, executing a target operation; candidates of the target operation comprise a first candidate and a second candidate; the first candidate comprises sending a first message on a first serving cell, and the second candidate does not comprise sending the first message on a serving cell of a terminal; and whether the target operation is the first candidate or the second candidate is dependent on at least a first time interval, the first time interval being related to at least one of a time at which the radio link failure prediction is made and a predicted time at which the radio link failure will occur. The solution provided by the present application facilitates the prediction and determination of radio link failures, and facilitates the selection of an appropriate UE behavior based on different prediction results, thereby balancing reliability and network optimization efficiency.

Description

Method and apparatus in a communication node used for wireless communication

[0001] This application claims priority to the Chinese Patent Application No. 202410662919.0, filed on May 27, 2024, and entitled "Method and apparatus in a communication node used for wireless communication", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to a transmission method and apparatus in a wireless communication system, and in particular to a method and apparatus for Radio Link Failure (RLF) prediction. BACKGROUND

[0003] Self-Organising Networks (SON) includes network self-configuration and self-optimization, in order to optimize the performance of the wireless link, the existing 3GPP (the 3rd Generation Partnership Project) protocol supports the User Equipment (UE) to perform connection re-establishment after discovering the Radio Link Failure (RLF), and stores the related information of the Radio Link Failure (RLF), and reports the stored related information of the Radio Link Failure (RLF) based on the base station scheduling.

[0004] With the continuous development of wireless communication, the demand is gradually diversified, therefore, in the future evolution, 3GPP will further enhance some key technologies, for example, applying AI (Artificial Intelligence) or ML (Machine Learning) to Radio Link Failure (RLF) prediction, reporting the prediction information in advance, and reducing the probability of Radio Link Failure (RLF). SUMMARY

[0005] The inventor found that in the existing RLF mechanism, when detecting downlink degradation, random access failure, RLC retransmission failure or handover failure, Radio Link Failure (RLF) will be triggered, and RRC re-establishment and cell selection will be started. Since the link quality may have deteriorated seriously when determining the Radio Link Failure (RLF), it will lead to re-establishment failure or difficulty in finding a suitable cell, and the UE will be forced to enter the idle state. The above mechanism may cause a long interruption delay and have a great impact on the quality of service, therefore, it is necessary to enhance the existing RLF mechanism, introduce the RLF prediction mechanism, and reduce the impact of the Radio Link Failure (RLF) by predicting the possible Radio Link Failure (RLF) in advance.

[0006] To solve the above problems, the present application provides a solution. In the description of the above problems, the NR system is taken as an example, and the present application is also applicable to scenarios of systems such as LTE (Long-Term Evolution) or LTE-A (Long-Term Evolution Advanced) or future 6G, and similar technical effects of the NR (New Radio) system are achieved; further, although the present application gives specific embodiments for the 3GPP system, the present application can also be used in non-3GPP system scenarios to achieve similar technical effects of the 3GPP system. Further, the unified design scheme for different scenarios also helps to reduce hardware complexity and cost. Further, although the original intention of the present application is to target the Uu air interface, the present application can also be used for the PC5 interface to achieve similar technical effects of the Uu air interface. Further, although the original intention of the present application is to target the LTM, the present application can also be used for conditional LTM or continuous LTM or SCPAC or CHO or CPC, etc., to achieve similar technical effects of the LTM. Further, although the original intention of the present application is to target the terminal and base station scenario, the present application is also applicable to the V2X (Vehicle-to-Everything) scenario, the communication scenario between the terminal and the relay, and the communication scenario between the relay and the base station, to achieve similar technical effects in the terminal and base station scenario. Further, although the original intention of the present application is to target the terminal and base station scenario, the present application is also applicable to the IAB (Integrated Access and Backhaul) communication scenario, to achieve similar technical effects in the terminal and base station scenario. Further, although the original intention of the present application is to target the TN (Terrestrial Network) scenario, the present application is also applicable to the NTN (Non-Terrestrial Network) communication scenario, to achieve similar technical effects in the TN scenario. In addition, the unified solution for different scenarios also helps to reduce hardware complexity and cost.

[0007] As an embodiment, the explanation of the terminology in the present application refers to the definition of the specification agreement TS36 series of 3GPP.

[0008] As an embodiment, the explanation of the terminology in the present application refers to the definition of the specification agreement TS38 series of 3GPP.

[0009] As an embodiment, the explanation of the terminology in the present application refers to the definition of the specification agreement TS37 series of 3GPP.

[0010] It should be noted that the embodiments in any node and the features in the embodiments of the present application can be applied to any other node without conflict. The embodiments and the features in the embodiments of the present application can be combined with each other without conflict.

[0011] The present application discloses a method used in a terminal, characterized in that, comprising:

[0012] Perform a target operation in response to predicting radio link failure; wherein, the candidate of the target operation includes a first candidate and a second candidate; the first candidate includes sending a first message on a first serving cell, and the second candidate does not include sending a first message on the first serving cell;

[0013] Wherein, whether the target operation is the first candidate or the second candidate depends on at least a first time interval, the first time interval is related to at least one of the time of predicting radio link failure and the time of predicted radio link failure;

[0014] Wherein, whether the target operation is the first candidate or the second candidate depends on a first time interval includes:

[0015] When at least the first time interval satisfies a first time length, the target operation is the first candidate;

[0016] When the first time interval does not satisfy the first time length, the target operation is the second candidate.

[0017] As an embodiment, the problem to be solved by the present application includes: how to enhance the existing RLF process to reduce interruption.

[0018] As an embodiment, the problem to be solved by the present application includes: how to enhance the existing RLF process to realize link failure prediction.

[0019] As an embodiment, the problem to be solved by the present application includes: how to design UE behavior after predicting link failure, such as reporting, to balance signaling overhead and reliability.

[0020] As an embodiment, the characteristics of the above method include: whether the target operation is the first candidate or the second candidate depends on at least a first time interval.

[0021] As an embodiment, the characteristics of the above method include: the first time interval is related to at least one of the time of predicting radio link failure and the time of predicted radio link failure.

[0022] As an embodiment, the benefits of the above method include: being conducive to realizing prediction and determining radio link failure.

[0023] As one embodiment, the above method has the benefit of facilitating selection of appropriate UE behavior according to different prediction results to balance reliability and network optimization efficiency.

[0024] As one embodiment, the above method has the benefit of facilitating improvement of robustness of the procedure.

[0025] As one embodiment, the above method has the benefit of facilitating reduction of signaling interaction.

[0026] According to one aspect of the present application, it is characterized in that the target operation is the first candidate or the second candidate depending on the status of a radio link failure monitoring parameter; the radio link failure monitoring parameter is used to determine a radio link failure.

[0027] As one embodiment, the above method has the benefit of facilitating implementation of monitoring of channel quality of the first candidate cell.

[0028] As one embodiment, the above method has the benefit of facilitating implementation of determination of UE behavior according to the status of the monitoring parameter.

[0029] As one embodiment, the above method has the benefit of facilitating reduction of signaling interaction.

[0030] According to one aspect of the present application, it is characterized in that the second candidate includes RRC connection reestablishment; the RRC connection reestablishment includes cell selection.

[0031] As one embodiment, the above method has the benefit of facilitating reduction of interruption time of the UE.

[0032] As one embodiment, the above method has the benefit of facilitating early ending of interruption time of the UE.

[0033] According to one aspect of the present application, it is characterized in that the first candidate does not include determination of radio link failure, and the second candidate includes determination of radio link failure.

[0034] As one embodiment, the above method has the benefit of facilitating reduction of modification to existing protocol.

[0035] As one embodiment, the above method has the benefit of facilitating flexibility of the protocol to adapt to different prediction results, and facilitating balance between network interaction delay and reliability.

[0036] According to one aspect of the present application, it is characterized in that neither the first candidate nor the second candidate includes determination of radio link failure.

[0037] As an embodiment, benefits of the above method include facilitating interruption delay of the UE.

[0038] According to an aspect of the present application, it features comprising:

[0039] concomitant to the first message, starting a first timer; in response to receiving a second message, stopping the first timer;

[0040] wherein the target operation is the first candidate; the second message is received while the first timer is running.

[0041] As an embodiment, benefits of the above method include facilitating robustness of the signaling interaction procedure.

[0042] As an embodiment, benefits of the above method include facilitating reduction of signaling interaction.

[0043] The present application discloses a method used in a base station, it features comprising:

[0044] receiving a first message;

[0045] wherein in response to predicting radio link failure, a sender of the first message performs a target operation; candidates of the target operation include a first candidate and a second candidate; the first candidate comprises sending the first message on a first serving cell, the second candidate does not comprise sending the first message on a serving cell of the terminal; whether the target operation is the first candidate or the second candidate depends on at least a first time interval, the first time interval is related to at least one of a time of predicting radio link failure and a time of predicted radio link failure;

[0046] wherein whether the target operation is the first candidate or the second candidate depends on the first time interval comprises:

[0047] when at least the first time interval satisfies a first time length, the target operation is the first candidate;

[0048] when the first time interval does not satisfy the first time length, the target operation is the second candidate.

[0049] According to an aspect of the present application, whether the target operation is the first candidate or the second candidate depends on a state of a radio link failure monitoring parameter; the radio link failure monitoring parameter is used to determine radio link failure.

[0050] According to an aspect of the present application, the second candidate comprises RRC connection reestablishment; the RRC connection reestablishment comprises cell selection.

[0051] According to an aspect of the present application, the first candidate does not include a determination of radio link failure, and the second candidate includes a determination of radio link failure.

[0052] According to an aspect of the present application, neither the first candidate nor the second candidate includes a determination of radio link failure.

[0053] According to an aspect of the present application, in conjunction with the first message, a sender of the first message starts a first timer; in response to sending the second message, the sender of the first message stops the first timer.

[0054] wherein the target operation is the first candidate; the second message is sent while the first timer is running.

[0055] The present application discloses a terminal, characterized in comprising:

[0056] The terminal comprises one or more processors and a memory;

[0057] The memory is coupled to the one or more processors, and the memory is configured to store computer program codes including computer instructions, and the one or more processors are configured to invoke the computer instructions to cause the terminal to perform the method.

[0058] The present application discloses a base station, characterized in comprising:

[0059] The base station comprises one or more processors and a memory;

[0060] The memory is coupled to the one or more processors, and the memory is configured to store computer program codes including computer instructions, and the one or more processors are configured to invoke the computer instructions to cause the base station to perform the method.

[0061] As an embodiment, compared with the conventional scheme, the present application has the following advantages:

[0062] -. It is beneficial to realize prediction of determination of radio link failure.

[0063] -. It is beneficial to select appropriate UE behavior according to different prediction results to balance reliability and network optimization efficiency.

[0064] -. It is beneficial to reduce the interruption time of UE.

[0065] -. It is beneficial to reduce the modification to the existing protocol.

[0066] - facilitate improving the robustness of the signaling interaction procedure.

[0067] - facilitate reducing the signaling interaction. BRIEF DESCRIPTION OF DRAWINGS

[0068] Other features, objects, and advantages of the application will become more apparent from the following detailed description when read in connection with the following accompanying drawings:

[0069] Fig. 1 shows a flowchart according to one embodiment of the present application;

[0070] Fig. 2 shows a schematic diagram of a network architecture according to one embodiment of the present application;

[0071] Fig. 3 shows a schematic diagram of an embodiment of a radio protocol architecture for the user and control planes according to one embodiment of the present application;

[0072] Fig. 4 shows a schematic diagram of a first communication device and a second communication device according to one embodiment of the present application;

[0073] Fig. 5 shows a flowchart of a wireless signal transmission according to one embodiment of the present application;

[0074] Fig. 6 shows a schematic diagram of the relationship between target operation and radio link failure monitoring parameters according to one embodiment of the present application;

[0075] Fig. 7 shows a schematic diagram of the second candidate according to one embodiment of the present application;

[0076] Fig. 8 shows a schematic diagram of the first candidate and the second candidate according to one embodiment of the present application;

[0077] Fig. 9 shows a schematic diagram of the first candidate and the second candidate according to another embodiment of the present application;

[0078] Fig. 10 shows a structural block diagram of a processing device for use in a terminal according to one embodiment of the present application;

[0079] Fig. 11 shows a structural block diagram of a processing device for use in a base station according to one embodiment of the present application;

[0080] Fig. 12 shows a schematic diagram of an artificial intelligence or machine learning based processing system according to one embodiment of the present application.

[0081] Fig. 13 shows a schematic diagram of RAN (Radio Access Network) domain AI / ML function deployment according to one embodiment of the present application.

[0082] FIG. 14 shows a schematic diagram of AI / ML function deployment of a UE according to an embodiment of the present application.

[0083] FIG. 15 shows a schematic diagram of an artificial intelligence or machine learning based processing system according to another embodiment of the present application. DETAILED DESCRIPTION

[0084] The technical solutions of the present application will be further described in detail below with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other arbitrarily without conflict.

[0085] Embodiment 1

[0086] Embodiment 1 illustrates a flowchart according to an embodiment of the present application, as shown in FIG. 1. In FIG. 1, each block represents a step, and it is particularly emphasized that the order of the blocks in the figure does not represent the time sequence between the steps represented.

[0087] In embodiment 1, the terminal in the present application performs a target operation in step 101 in response to predicting radio link failure;

[0088] The candidate of the target operation includes a first candidate and a second candidate; the first candidate includes sending a first message on a first serving cell, and the second candidate does not include sending a first message on a serving cell of the terminal; whether the target operation is the first candidate or the second candidate depends on at least a first time interval, the first time interval is related to at least one of the time of predicting radio link failure and the time of predicted radio link failure; whether the target operation is the first candidate or the second candidate depends on the first time interval, including:

[0089] When at least the first time interval satisfies a first time length, the target operation is the first candidate;

[0090] When the first time interval does not satisfy the first time length, the target operation is the second candidate.

[0091] As an embodiment, the first message indicates a prediction result.

[0092] As an embodiment, the first message indicates a measurement result.

[0093] As an embodiment, the first message indicates at least one of a prediction result or a measurement result.

[0094] As an embodiment, the first message indicates a prediction result and a measurement result.

[0095] As one embodiment, the prediction result refers to a prediction of a potential radio link failure.

[0096] As one sub-embodiment of the above embodiment, the prediction result comprises a time of occurrence of the potential radio link failure.

[0097] As one sub-embodiment of the above embodiment, the prediction result comprises a probability of occurrence of the potential radio link failure.

[0098] As one sub-embodiment of the above embodiment, the prediction result comprises a probability of radio link failure within a time period.

[0099] As one sub-embodiment of the above embodiment, the length of the time period is predefined.

[0100] As one sub-embodiment of the above embodiment, the length of the time period is fixed.

[0101] As one sub-embodiment of the above embodiment, the length of the time period is the first time length.

[0102] As one sub-embodiment of the above embodiment, the length of the time period depends on an output of the AI module.

[0103] As one sub-embodiment of the above embodiment, the length of the time period is preconfigured.

[0104] As one sub-embodiment of the above embodiment, the length of the time period is configured by an RRC message.

[0105] As one sub-embodiment of the above embodiment, the length of the time period is configured by a NAS message.

[0106] As one sub-embodiment of the above embodiment, the probability of radio link failure within the time period is a percentage probability.

[0107] As one sub-embodiment of the above embodiment, the probability of radio link failure within the time period is a quantized percentage probability.

[0108] As one sub-embodiment of the above embodiment, the probability of radio link failure within the time period is a Probability Density Function (PDF).

[0109] As one sub-embodiment of the above embodiment, the probability of radio link failure within the time period is a Cumulative Distribution Function (CDF).

[0110] As one sub-embodiment of the above-mentioned embodiment, the prediction result is a first bit; the first bit indicates whether a probability of the terminal experiencing radio link failure in the future period of time is greater than or equal to a second threshold.

[0111] As one sub-embodiment of the above-mentioned embodiment, a length of the first bit is 1 bit.

[0112] As one sub-embodiment of the above-mentioned embodiment, a value of the second threshold is 40%.

[0113] As one sub-embodiment of the above-mentioned embodiment, a value of the second threshold is 50%.

[0114] As one sub-embodiment of the above-mentioned embodiment, a value of the second threshold is 60%.

[0115] As one sub-embodiment of the above-mentioned embodiment, a value of the second threshold is 75%.

[0116] As one sub-embodiment of the above-mentioned embodiment, a value of the second threshold is 80%.

[0117] As one sub-embodiment of the above-mentioned embodiment, a value of the second threshold is a positive integer multiple of 5%.

[0118] As one sub-embodiment of the above-mentioned embodiment, a value of the second threshold is fixed.

[0119] As one sub-embodiment of the above-mentioned embodiment, a value of the second threshold is pre-configured.

[0120] As one sub-embodiment of the above-mentioned embodiment, when the value of the first bit is 1, it indicates that the probability of the terminal experiencing radio link failure in the future period of time is not less than the second threshold.

[0121] As one sub-embodiment of the above-mentioned embodiment, when the value of the first bit is 0, it indicates that the probability of the terminal experiencing radio link failure in the future period of time is less than the second threshold.

[0122] As one sub-embodiment of the above-mentioned embodiment, when the value of the first bit is 1, it indicates that the probability of the terminal experiencing radio link failure in the future period of time is greater than the second threshold.

[0123] As one sub-embodiment of the above-mentioned embodiment, when the value of the first bit is 0, it indicates that the probability of the terminal experiencing radio link failure in the future period of time is not greater than the second threshold.

[0124] As one subembodiment of the above embodiment, when the value of the first bit is 0, it indicates that the probability of the terminal experiencing radio link failure in the future period of time is not less than the second threshold.

[0125] As one subembodiment of the above embodiment, when the value of the first bit is 1, it indicates that the probability of the terminal experiencing radio link failure in the future period of time is less than the second threshold.

[0126] As one subembodiment of the above embodiment, when the value of the first bit is 0, it indicates that the probability of the terminal experiencing radio link failure in the future period of time is greater than the second threshold.

[0127] As one subembodiment of the above embodiment, when the value of the first bit is 1, it indicates that the probability of the terminal experiencing radio link failure in the future period of time is not greater than the second threshold.

[0128] As one embodiment, the measurement result is an L1 measurement.

[0129] As one embodiment, the measurement result is an L3 measurement.

[0130] As one embodiment, the measurement result includes an RSRP (reference signal received power) measurement.

[0131] As one embodiment, the measurement result includes an RSRQ (reference signal received quality) measurement.

[0132] As one embodiment, the measurement result includes an SINR (signal-to-interference and noise ratio) measurement.

[0133] As one embodiment, the measurement result is a Measurement Report.

[0134] As one embodiment, the first message is a Measurement Report.

[0135] As one embodiment, the first message includes a Measurement Report.

[0136] As one embodiment, the measurement result includes measurement results for the first serving cell.

[0137] As one embodiment, the measurement result includes measurement results for a neighbor cell.

[0138] As one embodiment, the measurement result is an input of the AI module.

[0139] As one embodiment, the measurement result is part of an input of the AI module.

[0140] As one embodiment, the prediction result depends on the measurement result.

[0141] As one embodiment, the prediction result depends on an output of the AI module; the output of the AI module depends on an input of the AI module; and the measurement result is at least part of the input of the AI module.

[0142] As one embodiment, the prediction result depends on an output of the AI module.

[0143] As one embodiment, the first message depends on an output of the AI module.

[0144] As one embodiment, the first message indicates a Model ID of the AI module.

[0145] As one embodiment, the first candidate comprises: receiving a second message as a response to sending the first message on the first serving cell.

[0146] As one embodiment, the first candidate comprises sending the first message on the first serving cell means that the first candidate comprises sending the first message at least on the first serving cell.

[0147] As one embodiment, the second candidate not comprising sending the first message on a serving cell of the terminal comprises: the second candidate comprising sending the first message at least not on the first serving cell.

[0148] As one embodiment, the first time interval satisfying the first time length means that the first time interval is greater than the first time length; and the first time interval not satisfying the first time length means that the first time interval is not greater than the first time length.

[0149] As one embodiment, the first time interval satisfying the first time length means that the first time interval is not less than the first time length; and the first time interval not satisfying the first time length means that the first time interval is less than the first time length.

[0150] As one embodiment, the first time length is predicted.

[0151] As one embodiment, the first time length is configured by an RRC message.

[0152] As one embodiment, the first time length is predefined.

[0153] As one embodiment, the first time length depends on the output of an AI module.

[0154] As one embodiment, the first time length is a Response Window.

[0155] As one embodiment, the first time length comprises a typical value of time required for successfully transmitting the first message and successfully receiving the second message.

[0156] As one embodiment, the first time length comprises a typical value of time required for successfully transmitting the first message and successfully receiving the second message.

[0157] As one embodiment, the first time interval is a time interval after the time of predicted radio link failure.

[0158] As one embodiment, the first time interval is a time interval before the time of predicted radio link failure.

[0159] As one embodiment, the first time interval is a time interval between the time of predicted radio link failure and the time of predicted radio link failure.

[0160] As one embodiment, the first time interval is related to at least one of the time of predicted radio link failure and the time of predicted radio link failure means that the first time interval is a time interval between the time of predicted radio link failure and the time of predicted radio link failure or a time interval after the time of predicted radio link failure or a time interval before the time of predicted radio link failure; wherein the first time interval depends on RRC message configuration.

[0161] As one embodiment, the first time interval satisfies the first time length means that the first time interval is not greater than the first time length; the first time interval does not satisfy the first time length means that the first time interval is greater than the first time length.

[0162] As one embodiment, the first time interval satisfies the first time length means that the first time interval is less than the first time length; the first time interval does not satisfy the first time length means that the first time interval is not less than the first time length.

[0163] As an embodiment, the first time interval satisfying the first time length means that the first time interval is not less than the first time length; the first time interval not satisfying the first time length means that the first time interval is less than the first time length.

[0164] As an embodiment, the first time interval satisfying the first time length means that the first time interval is greater than the first time length; the first time interval not satisfying the first time length means that the first time interval is not greater than the first time length.

[0165] As an embodiment, the first time interval length depends on the first message.

[0166] As an embodiment, the first time interval depends on the prediction result.

[0167] As a sub-embodiment of the above embodiment, the first time interval depends on the occurrence probability of the possible radio link failure.

[0168] As a sub-embodiment of the above embodiment, the first time interval depends on the probability density function of the possible radio link failure.

[0169] As a sub-embodiment of the above embodiment, the first time interval depends on the cumulative distribution function of the possible radio link failure.

[0170] As a sub-embodiment of the above embodiment, the first time interval depends on the second threshold.

[0171] As a sub-embodiment of the above embodiment, the first time interval depends on the probability density function of the possible radio link failure and the second threshold.

[0172] As a sub-embodiment of the above embodiment, the first time interval depends on the cumulative distribution function of the possible radio link failure and the second threshold.

[0173] As a sub-embodiment of the above embodiment, the probability of the possible radio link failure in the first time interval is equal to the second threshold.

[0174] As a sub-embodiment of the above embodiment, the integral of the probability density function of the possible radio link failure with respect to time in the first time interval is equal to the second threshold.

[0175] As a sub-embodiment of the above embodiment, for the cumulative distribution function of the probability of the possible radio link failure, the function value corresponding to the end time of the first time interval is equal to the second threshold.

[0176] As a sub-embodiment of the above-mentioned embodiment, a difference between a function value corresponding to the end moment of the first time interval and a function value corresponding to the start moment of the first time interval of the cumulative distribution function of the probability of the possible radio link failure is equal to the second threshold.

[0177] As an embodiment, the target operation comprises selection of the first candidate or the second candidate.

[0178] As an embodiment, whether the target operation is the first candidate or the second candidate depends on a predicted probability of occurrence of a radio link failure.

[0179] As a sub-embodiment of the above-mentioned embodiment, if the first predicted probability of occurrence of a radio link failure is not lower than a third threshold, the target operation is the second candidate.

[0180] As a sub-embodiment of the above-mentioned embodiment, if the first predicted probability of occurrence of a radio link failure is lower than the third threshold and higher than the second threshold, the target operation is the first candidate.

[0181] As a sub-embodiment of the above-mentioned embodiment, if the first predicted probability of occurrence of a radio link failure is lower than the second threshold, the target operation is not performed.

[0182] As a sub-embodiment of the above-mentioned embodiment, the third threshold is preconfigured.

[0183] As a sub-embodiment of the above-mentioned embodiment, the third threshold is predefined.

[0184] As a sub-embodiment of the above-mentioned embodiment, the third threshold is fixed.

[0185] As a sub-embodiment of the above-mentioned embodiment, the third threshold has a default value.

[0186] As a sub-embodiment of the above-mentioned embodiment, the third threshold is higher than the second threshold.

[0187] As an embodiment, whether the target operation is the first candidate or the second candidate depends on a first time interval and a predicted probability of occurrence of a radio link failure.

[0188] As a sub-embodiment of the above-mentioned embodiment, if the first time interval satisfies the first time length, and the first predicted probability of occurrence of a radio link failure is not lower than the second threshold, the target operation is the first candidate.

[0189] As a sub-example of the above example, if the first time interval does not satisfy the first time length, and the first predicted probability of occurrence of radio link failure is not lower than the second threshold, the target operation is the second candidate.

[0190] As an example, whether the target operation is the first candidate or the second candidate depends on the predicted probability of occurrence of radio link failure within a first time interval.

[0191] As a sub-example of the above example, if the first predicted probability of occurrence of radio link failure within the first time interval is not lower than a third threshold, the target operation is the second candidate.

[0192] As a sub-example of the above example, if the first predicted probability of occurrence of radio link failure within the first time interval is lower than the third threshold and higher than the second threshold, the target operation is the first candidate.

[0193] As a sub-example of the above example, if the first predicted probability of occurrence of radio link failure within the first time interval is lower than the second threshold, the target operation is not performed.

[0194] As an example, whether the target operation is the first candidate or the second candidate depends on whether there is a suitable cell.

[0195] As a sub-example of the above example, when there is a suitable cell, the second candidate is performed.

[0196] As a sub-example of the above example, when there is no suitable cell, the first candidate is performed.

[0197] As an example, whether the target operation is the first candidate or the second candidate depends on the predicted probability of occurrence of radio link failure within a first time interval and whether there is a suitable cell.

[0198] As a sub-example of the above example, if the predicted probability of occurrence of radio link failure within the first time interval is not lower than a third threshold, and there is a suitable cell, the target operation is the second candidate.

[0199] As a sub-example of the above example, if the predicted probability of occurrence of radio link failure within the first time interval is lower than the third threshold and higher than the second threshold, or there is no suitable cell, the target operation is the second candidate.

[0200] As a sub-embodiment of the above-mentioned embodiment, the target operation is not performed if the predicted probability of radio link failure is lower than the second threshold in the first time interval.

[0201] As an embodiment, whether the target operation is the first candidate or the second candidate depends on the first information.

[0202] As an embodiment, whether the target operation is the first candidate or the second candidate depends on the output of an AI module.

[0203] As a sub-embodiment of the above-mentioned embodiment, whether the target operation is the first candidate or the second candidate depends on the first information; the first information depends on the output of the AI module.

[0204] As an embodiment, whether the target operation is the first candidate or the second candidate depends on the probability density distribution function of the predicted radio link failure.

[0205] As an embodiment, whether the target operation is the first candidate or the second candidate depends on the first time interval.

[0206] As an embodiment, whether the target operation is the first candidate or the second candidate depends on the second threshold.

[0207] As an embodiment, whether the target operation is the first candidate or the second candidate depends on the third threshold.

[0208] As an embodiment, the target operation is the second candidate when the integral of the probability density function of the predicted radio link failure over the first time interval is not less than the third threshold.

[0209] As an embodiment, the target operation is the first candidate when the integral of the probability density function of the predicted radio link failure over the first time interval is not less than the second threshold.

[0210] As an embodiment, the target operation is the second candidate when the integral of the probability density function of the predicted radio link failure over the first time interval is less than the third threshold and not less than the second threshold.

[0211] As an embodiment, the target operation is not performed when the integral of the probability density function of the predicted radio link failure over the first time interval is less than the second threshold.

[0212] As an embodiment, whether the target operation is the first candidate or the second candidate depends on the cumulative distribution function of the predicted probability of radio link failure.

[0213] As one embodiment, for the cumulative distribution function of the predicted radio link failure probability, when the difference between the function value corresponding to the end time of the first time interval and the function value corresponding to the start time of the first time interval is not less than the third threshold, the target operation is the second candidate.

[0214] As one embodiment, for the cumulative distribution function of the predicted radio link failure probability, when the difference between the function value corresponding to the end time of the first time interval and the function value corresponding to the start time of the first time interval is not less than the second threshold, the target operation is the first candidate.

[0215] As one embodiment, for the cumulative distribution function of the predicted radio link failure probability, when the difference between the function value corresponding to the end time of the first time interval and the function value corresponding to the start time of the first time interval is less than the third threshold and not less than the second threshold, the target operation is the second candidate.

[0216] As one embodiment, for the cumulative distribution function of the predicted radio link failure probability, when the difference between the function value corresponding to the end time of the first time interval and the function value corresponding to the start time of the first time interval is less than the third threshold, the target operation is not performed.

[0217] Embodiment 2

[0218] Embodiment 2 illustrates a diagram of a network architecture according to one embodiment of the application, as shown in FIG. 2. FIG. 2 illustrates a network architecture 200 for a 5G NR (New Radio) / LTE (Long-Term Evolution) / LTE-A (Long-Term Evolution Advanced) system. The 5G NR / LTE / LTE-A network architecture 200 can be referred to as a 5GS (5G System) / EPS (Evolved Packet System) 200 or some other suitable terminology. The 5GS / EPS 200 includes a UE (User Equipment) 201, a RAN (Radio Access Network) 202, a 5GC (5G Core Network, 5G Core Network) / EPC (Evolved Packet Core) 210, a HSS (Home Subscriber Server) / UDM (Unified Data Management) 220, and at least one of an Internet service 230. The 5GS / EPS can interconnect with other access networks, but these entities / interfaces are not shown for simplicity. As shown, the 5GS / EPS provides packet-switched services, however, one of skill in the art will readily appreciate that the various concepts presented throughout this application can be extended to networks providing circuit-switched services or other cellular networks. The RAN includes a node 203 and other nodes 204. The node 203 provides user and control plane protocol terminations toward the UE 201. The node 203 can be connected to the other nodes 204 via an Xn interface (e.g., backhaul) / X2 interface. The node 203 can also be referred to as a base station, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a Basic Service Set (BSS), an Extended Service Set (ESS), a TRP (Transmission Reception Point), or some other suitable terminology. The node 203 provides an access point to the 5GC / EPC 210 for a UE 201.Examples of UE 201 include cellular phones, smart phones, Session Initiation Protocol (SIP) phones, laptop computers, Personal Digital Assistants (PDAs), satellite radios, non-terrestrial base station communications, satellite mobile communications, global positioning systems, multimedia devices, video devices, digital audio players (e.g., MP3 players), cameras, game consoles, drones, aerial vehicles, narrowband internet of things devices, machine type communication devices, land vehicles, automobiles, wearable devices, or any other similar functional device. Those skilled in the art will also recognize that UE 201 can be referred to as a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology. Node 203 is connected to 5GC / EPC 210 over an S1 / NG interface. 5GC / EPC 210 includes MME (Mobility Management Entity) / AMF (Authentication Management Field) / SMF (Session Management Function) 211, other MME / AMF / SMF 214, S-GW (Service Gateway) / UPF (User Plane Function) 212, and P-GW (Packet Data Network Gateway) / UPF 213. MME / AMF / SMF 211 is the control node that processes the signaling between UE 201 and 5GC / EPC 210. Generally, MME / AMF / SMF 211 provides bearer and connection management. All user IP (Internet Protocal) packets are transferred through S-GW / UPF 212, which itself connects to P-GW / UPF 213. The P-GW provides UE IP address allocation as well as other functions. P-GW / UPF 213 connects to Internet services 230. Internet services 230 include operator corresponding Internet protocol services, which can specifically include the Internet, an intranet, IMS (IP Multimedia Subsystem), and packet switched streaming services.

[0219] As one embodiment, the UE 201 corresponds to the terminal in the present application.

[0220] As an embodiment, the UE 201 is a user equipment (UE).

[0221] As an embodiment, the UE 201 is a base station (BS).

[0222] As an embodiment, the UE 201 is a relay device.

[0223] As an embodiment, the UE 201 is a gateway device.

[0224] As an embodiment, the node 203 corresponds to the base station in the present application.

[0225] As an embodiment, the node 203 is a base station device.

[0226] As an embodiment, the node 203 is a user equipment.

[0227] As an embodiment, the node 203 is a relay device.

[0228] As an embodiment, the node 203 is a gateway device.

[0229] Typically, the UE 201 is a user equipment and the node 203 is a base station device.

[0230] Typically, the UE 201 is a user equipment and the node 203 is a user equipment.

[0231] Typically, the UE 201 is a base station device and the node 203 is a base station device.

[0232] As an embodiment, the user equipment supports non-terrestrial network (NTN) transmission.

[0233] As an embodiment, the user equipment supports terrestrial network (TN) transmission.

[0234] As an embodiment, the user equipment supports dual connection (DC) transmission.

[0235] As an embodiment, the user equipment includes an aerial vehicle.

[0236] As an embodiment, the user equipment includes a vehicle-mounted terminal.

[0237] As one embodiment, the user equipment comprises a ship.

[0238] As one embodiment, the user equipment comprises an Internet of Things terminal.

[0239] As one embodiment, the user equipment comprises a terminal of an industrial Internet of Things.

[0240] As one embodiment, the user equipment comprises a device supporting low latency and high reliability transmission.

[0241] As one embodiment, the user equipment comprises a test device.

[0242] As one embodiment, the user equipment comprises a signaling tester.

[0243] As one embodiment, the user equipment comprises an IAB (Integrated Access and Backhaul) -MT (Mobile Termination).

[0244] As one embodiment, the base station equipment supports transmission in a non-terrestrial network.

[0245] As one embodiment, the base station equipment supports transmission in a terrestrial network.

[0246] As one embodiment, the base station equipment comprises a Base Transceiver Station (BTS).

[0247] As one embodiment, the base station equipment comprises a NodeB (NB).

[0248] As one embodiment, the base station equipment comprises a gNB.

[0249] As one embodiment, the base station equipment comprises an eNB.

[0250] As one embodiment, the base station equipment comprises an ng-eNB.

[0251] As one embodiment, the base station equipment comprises an en-gNB.

[0252] As one embodiment, the base station equipment comprises a CU (Centralized Unit).

[0253] As one embodiment, the base station equipment comprises a DU (Distributed Unit).

[0254] As one embodiment, the base station device comprises a TRP (Transmitter Receiver Point).

[0255] As one embodiment, the base station device comprises a macro cellular base station.

[0256] As one embodiment, the base station device comprises a micro cell base station.

[0257] As one embodiment, the base station device comprises a pico cell base station.

[0258] As one embodiment, the base station device comprises a femto cell.

[0259] As one embodiment, the base station device comprises a flight platform device.

[0260] As one embodiment, the base station device comprises a satellite device.

[0261] As one embodiment, the base station device comprises a test device.

[0262] As one embodiment, the base station device comprises a signaling tester.

[0263] As one embodiment, the base station device comprises a gateway device.

[0264] As one embodiment, the base station device comprises an IAB-node.

[0265] As one embodiment, the base station device comprises an IAB-donor.

[0266] As one embodiment, the base station device comprises an IAB-donor-CU.

[0267] As one embodiment, the base station device comprises an IAB-donor-DU.

[0268] As one embodiment, the base station device comprises an IAB-DU.

[0269] As one embodiment, the base station device comprises an IAB-MT.

[0270] As one embodiment, the relay device comprises a relay.

[0271] As one embodiment, the relay device comprises an L3 relay.

[0272] As one embodiment, the relay device comprises an L2 relay.

[0273] As one embodiment, the relay device comprises a router.

[0274] As one embodiment, the relay device comprises a switch.

[0275] As one embodiment, the relay device comprises a gateway device.

[0276] As one embodiment, the relay device comprises a user device.

[0277] As one embodiment, the relay device comprises a base station device.

[0278] Embodiment 3

[0279] Figure 3 is a diagram illustrating an embodiment of a radio protocol architecture for the user plane 350 and the control plane 300. Figure 3 shows three layers for the radio protocol architecture for the control plane 300: Layer 1, Layer 2, and Layer 3. Layer 1 (LI layer) is the lowest layer and implements various PHY (Physical layer) signal processing functions. The LI layer will be referred to as the PHY 301 herein. Layer 2 (L2 layer) 305 is above the PHY 301 and includes a MAC (Medium Access Control) sublayer 302, a RLC (Radio Link Control) sublayer 303, and a PDCP (Packet Data Convergence Protocol) sublayer 304. The PDCP sublayer 304 provides multiplexing between different radio bearers and logical channels. The PDCP sublayer 304 also provides security functions, such as ciphering of the data packets, and header compression. The RLC sublayer 303 provides segmentation and reassembly of upper layer data packets, retransmission of lost data packets, and reordering of data packets to compensate for out-of-order reception due to HARQ. The MAC sublayer 302 provides multiplexing between logical and transport channels. The MAC sublayer 302 is also responsible for allocating the various radio resources (e.g., resource blocks) in one cell. The MAC sublayer 302 is also responsible for HARQ operations. The RRC (Radio Resource Control) sublayer 306 in Layer 3 (L3 layer) in the control plane 300 is responsible for obtaining radio resources (i.e., radio bearers) and using RRC signaling to configure the lower layers. The radio protocol architecture for the user plane 350 includes Layer 1 (LI layer) and Layer 2 (L2 layer), which are substantially the same as the corresponding layers and sublayers in the control plane 300 for the physical layer 351, the PDCP sublayer 354 in the L2 layer 355, the RLC sublayer 353 in the L2 layer 355, and the MAC sublayer 352 in the L2 layer 355, but the PDCP sublayer 354 also provides header compression for upper layer data packets to reduce radio transmission overhead. Also included in the L2 layer 355 in the user plane 350 is the SDAP (Service Data Adaptation Protocol) sublayer 356, which is responsible for mapping between QoS (Quality of Service) flows and data radio bearers (DRBs) to support diverse traffic.

[0280] As one embodiment, the wireless protocol architecture in FIG. 3 is applicable to the terminal in the present application.

[0281] As one embodiment, the wireless protocol architecture in FIG. 3 is applicable to the base station in the present application.

[0282] As one embodiment, the first message in the present application is generated at the RRC 306.

[0283] As one embodiment, the first message in the present application is generated at the MAC 302 or the MAC 352.

[0284] As one embodiment, the first message in the present application is generated at the PHY 301 or the PHY 351.

[0285] As one embodiment, the second message in the present application is generated at the RRC 306.

[0286] As one embodiment, the second message in the present application is generated at the MAC 302 or the MAC 352.

[0287] As one embodiment, the second message in the present application is generated at the PHY 301 or the PHY 351.

[0288] Embodiment 4

[0289] Embodiment 4 shows a schematic diagram of a first communication device and a second communication device according to the present application, as shown in FIG. 4. FIG. 4 is a block diagram of a first communication device 450 and a second communication device 410 communicating with each other in an access network.

[0290] The first communication device 450 includes a controller / processor 459, a memory 460, a data source 467, a transmit processor 468, a receive processor 456, a multi-antenna transmit processor 457, a multi-antenna receive processor 458, a transmitter / receiver 454, and an antenna 452.

[0291] The second communication device 410 includes a controller / processor 475, a memory 476, a receive processor 470, a transmit processor 416, a multi-antenna receive processor 472, a multi-antenna transmit processor 471, a transmitter / receiver 418, and an antenna 420.

[0292] In the transmission from the second communication device 410 to the first communication device 450, at the second communication device 410, upper layer packets from the core network are provided to the controller / processor 475. The controller / processor 475 implements functionality of the L2 layer. In the transmission from the second communication device 410 to the first communication device 450, the controller / processor 475 provides header compression, ciphering, packet segmentation and reordering, multiplexing between logical and transport channels, and radio resource allocations for the first communication device 450 based on various priority metrics. The controller / processor 475 is also responsible for retransmission of lost packets, and signaling to the first communication device 450. The transmit processor 416 and the multiple antenna transmit processor 471 implement various signal processing functions for the LI layer (i.e., physical layer). The transmit processor 416 implements coding and interleaving to facilitate forward error correction (FEC) at the second communication device 410, and mapping of coded and interleaved data onto various signal constellations based on various modulation schemes (e.g., binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), M-phase shift keying (M-PSK), M-quadrature amplitude modulation (M-QAM)). The multiple antenna transmit processor 471 performs digital spatial pre-coding of the coded and modulated symbols, including codebook-based and non-codebook-based pre-coding, and beamforming processing, to generate one or more spatial streams. The transmit processor 416 then maps to each spatial stream to the subcarriers, multiplexes the stream with reference signals (e.g., pilot) in the time and / or frequency domain, and then performs an inverse fast Fourier transform (IFFT) to generate a time-domain multicarrier symbol stream for the physical channel. The multiple antenna transmit processor 471 then performs transmit analog pre-coding / beamforming operations on the time-domain multicarrier symbol stream. Each transmitter 418 converts the baseband multicarrier symbol stream provided by the multiple antenna transmit processor 471 into a radio frequency stream, and then provides the radio frequency stream to the corresponding antenna 420.

[0293] In transmissions from the second communication device 410 to the first communication device 450, at the first communication device 450, each receiver 454 receives a signal through its respective antenna 452. Each receiver 454 recovers information modulated onto an RF carrier and provides the recovered information at baseband as a stream of symbols to a receive processor 456. The receive processor 456 and a multiple access receiver processor 458 implement various signal processing functions of the Ll layer. The multiple access receiver processor 458 performs receive analog precoding / beamforming operations on the baseband multiple access symbol streams from the receivers 454. The receive processor 456 converts the baseband multiple access symbol streams from the time-domain to the frequency domain using a Fast Fourier Transform (FFT). In the frequency domain, the physical layer data signals and the reference signals are demultiplexed from the received symbol streams to be used in channel estimation by the receive processor 456, and the data signals are recovered after multiple access detection in the multiple access receiver processor 458 for any spatial streams destined for the first communication device 450. The symbols on each spatial stream are demodulated and recovered by the receive processor 456 and used to generate soft decisions. The receive processor 456 then decodes and de-interleaves the soft decisions to recover the upper layer data and control signals transmitted by the second communication device 410 on the physical channel. The upper layer data and control signals are then provided to a controller / processor 459. The controller / processor 459 implements the functions of the L2 layer. The controller / processor 459 can be associated with a memory 460 that stores program codes and data. The memory 460 can be referred to as a computer-readable medium. In transmissions from the second communication device 410 to the second communication device 450, the controller / processor 459 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, control signal processing to recover upper layer data packets from the core network. The upper layer data packets are then provided to all protocol layers above the L2 layer. Various control signals can also be provided to the L3 for L3 processing.

[0294] In the transmission from the first communication device 450 to the second communication device 410, at the first communication device 450, a data source 467 is used to provide upper layer data packets to a controller / processor 459. The data source 467 represents all protocol layers above the L2 layer. Similar to the transmit function at the second communication device 410 described in the transmission from the second communication device 410 to the first communication device 450, the controller / processor 459 implements header compression, ciphering, packet segmentation and reordering, and multiplexing between logical and transport channels based on radio resource allocations, implements L2 layer functionality for the user plane and control plane. The controller / processor 459 is also responsible for error detection, retransmission of lost packets, and signaling to the second communication device 410. A transmit processor 468 performs modulation mapping, channel coding processing, and a multi-antenna transmit processor 457 performs digital multi-antenna spatial precoding, including codebook-based precoding and non-codebook-based precoding, and beamforming processing, and then the transmit processor 468 modulates the resulting spatial streams into multi-carrier / single-carrier symbol streams, which are then provided to different antennas 452 via transmitters 454 after analog precoding / beamforming operations in the multi-antenna transmit processor 457. Each transmitter 454 first converts the baseband symbol stream provided by the multi-antenna transmit processor 457 into a radio frequency signal, and then provides the radio frequency signal to the antenna 452.

[0295] In the transmission from the first communication device 450 to the second communication device 410, the functions at the second communication device 410 are similar to the receive functions at the first communication device 450 described in the transmission from the second communication device 410 to the first communication device 450. Each receiver 418 receives a radio frequency signal through its respective antenna 420, converts the received radio frequency signal into a baseband signal, and provides the baseband signal to a multi-antenna receive processor 472 and a receive processor 470. The receive processor 470 and the multi-antenna receive processor 472 collectively implement the functionality of the L1 layer. A controller / processor 475 implements the functionality of the L2 layer. The controller / processor 475 can be associated with a memory 476 that stores program codes and data. The memory 476 can be referred to as a computer readable medium. In the transmission from the first communication device 450 to the second communication device 410, the controller / processor 475 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, control signal processing to recover upper layer data packets from the UE 450. Upper layer data packets from the controller / processor 475 can be provided to a core network.

[0296] As one embodiment, the first communication device 450 comprises: at least one processor and at least one memory including computer program code; the at least one memory and the computer program code configured to, with the at least one processor, cause the first communication device 450 at least to: perform a target operation in response to predicting a radio link failure; wherein candidates of the target operation comprise a first candidate and a second candidate; the first candidate comprises sending a first message on a first serving cell, the second candidate does not comprise sending a first message on the first serving cell; whether the target operation is the first candidate or the second candidate depends on at least a first time interval, the first time interval relates to at least one of a time of predicting the radio link failure and a time of predicted radio link failure; whether the target operation is the first candidate or the second candidate depending on the first time interval comprises: the target operation is the first candidate when at least the first time interval satisfies a first time length; the target operation is the second candidate when the first time interval does not satisfy the first time length.

[0297] As one embodiment, the first communication device 450 comprises: a memory storing a computer readable program of instructions which, when executed by at least one processor, causes actions comprising: performing a target operation in response to predicting a radio link failure; wherein candidates of the target operation comprise a first candidate and a second candidate; the first candidate comprises sending a first message on a first serving cell, the second candidate does not comprise sending a first message on the first serving cell; whether the target operation is the first candidate or the second candidate depends on at least a first time interval, the first time interval relates to at least one of a time of predicting the radio link failure and a time of predicted radio link failure; whether the target operation is the first candidate or the second candidate depending on the first time interval comprises: the target operation is the first candidate when at least the first time interval satisfies a first time length; the target operation is the second candidate when the first time interval does not satisfy the first time length.

[0298] As one embodiment, the second communication device 410 comprises: at least one processor and at least one memory including a computer program code; the at least one memory and the computer program code are configured to, with the at least one processor, cause performance of: performing a target operation in response to predicting a radio link failure; wherein candidates of the target operation include a first candidate and a second candidate; the first candidate comprises receiving a first message on a first serving cell, the second candidate does not comprise receiving the first message on a serving cell of the terminal; whether the target operation is the first candidate or the second candidate depends on at least a first time interval, the first time interval is related to at least one of a time of predicting the radio link failure and a time of predicted radio link failure; whether the target operation is the first candidate or the second candidate depending on the first time interval comprises: when at least the first time interval satisfies a first time length, the target operation is the first candidate; when the first time interval does not satisfy the first time length, the target operation is the second candidate.

[0299] As one embodiment, the second communication device 410 comprises: a memory storing a computer readable program of instructions which, when executed by at least one processor, causes performance of: performing a target operation in response to predicting a radio link failure; wherein candidates of the target operation include a first candidate and a second candidate; the first candidate comprises receiving a first message on a first serving cell, the second candidate does not comprise receiving the first message on a serving cell of the terminal; whether the target operation is the first candidate or the second candidate depends on at least a first time interval, the first time interval is related to at least one of a time of predicting the radio link failure and a time of predicted radio link failure; whether the target operation is the first candidate or the second candidate depending on the first time interval comprises: when at least the first time interval satisfies a first time length, the target operation is the first candidate; when the first time interval does not satisfy the first time length, the target operation is the second candidate.

[0300] As one embodiment, at least one of the antenna 452, the transmitter 454, the transmit processor 468, the controller / processor 459 is configured to transmit the first message.

[0301] As one embodiment, at least one of the antenna 420, the receiver 418, the receive processor 470, the controller / processor 475 is configured to receive the first message.

[0302] As an embodiment, at least one of the antenna 452, the receiver 454, the receiving processor 456, the controller / processor 459 is configured to receive the second message.

[0303] As an embodiment, at least one of the antenna 420, the transmitter 418, the transmitting processor 416, the controller / processor 475 is configured to transmit the second message.

[0304] As an embodiment, the first communication device 450 corresponds to a terminal in the present application.

[0305] As an embodiment, the second communication device 410 corresponds to a base station in the present application.

[0306] As an embodiment, the second communication device 410 corresponds to a third node in the present application.

[0307] As an embodiment, the first communication device 450 is a user equipment.

[0308] As an embodiment, the first communication device 450 is a base station device.

[0309] As an embodiment, the first communication device 450 is a relay device.

[0310] As an embodiment, the second communication device 410 is a user equipment.

[0311] As an embodiment, the second communication device 410 is a base station device.

[0312] As an embodiment, the second communication device 410 is a relay device.

[0313] Embodiment 5

[0314] Embodiment 5 illustrates a flow chart of wireless signal transmission according to an embodiment of the present application, as shown in FIG. 5. It is particularly stated that the sequence in this example does not limit the sequence of signal transmission and the sequence of implementation in the present application.

[0315] For the terminal U01:

[0316] In step S5101, as a response to predicting radio link failure, a target operation is performed;

[0317] In step S5102, a first message is transmitted;

[0318] In step S5103, a first timer is started along with the first message;

[0319] In step S5104, a second message is received;

[0320] In step S5105, as a response to receiving the second message, the first timer is stopped;

[0321] In step S5106, a radio link failure is determined;

[0322] In step S5107, an RRC connection re-establishment is performed; the RRC connection re-establishment includes cell selection;

[0323] For the base station N02:

[0324] In step S5201, the first message is received;

[0325] In step S5202, the second message is sent;

[0326] In embodiment 5, the candidate of the target operation includes a first candidate and a second candidate; the first candidate includes sending a first message on a first serving cell, the second candidate does not include sending a first message on a serving cell of the terminal; the second message is received when the first timer is running.

[0327] As an embodiment, the target operation is the first candidate;

[0328] As an embodiment, the terminal U01 and the base station N02 are connected through a wireless connection.

[0329] As an embodiment, the terminal U01 and the base station N02 are connected through a wired connection.

[0330] As an embodiment, the terminal U01 and the base station N02 are connected through a Uu interface.

[0331] As an embodiment, the terminal U01 and the base station N02 are connected through an IAB interface.

[0332] As an embodiment, the terminal U01 and the base station N02 are connected through a PC5 interface.

[0333] As an embodiment, the dashed box F5.1 is optional.

[0334] As an embodiment, the dashed box F5.1 exists.

[0335] As an embodiment, the dashed box F5.1 does not exist.

[0336] As an embodiment, the dashed box F5.2 is optional.

[0337] As an embodiment, the dashed box F5.2 exists.

[0338] As one embodiment, the dashed box F5.2 is not present.

[0339] As one embodiment, the dashed box F5.3 is optional.

[0340] As one embodiment, the dashed box F5.3 is present.

[0341] As one embodiment, the dashed box F5.3 is not present.

[0342] As one embodiment, when the dashed box F5.1 is not present, then the dashed box F5.2 is not present.

[0343] As one embodiment, when the dashed box F5.1 is present, then the dashed box F5.2 is present.

[0344] As one embodiment, when the dashed box F5.1 is present, then the dashed box F5.2 is optional.

[0345] As one embodiment, when the dashed box F5.1 is present or optional, then the dashed box F5.2 is present or optional.

[0346] As one embodiment, the dashed box F5.1 is present and the dashed box F5.3 is not present.

[0347] As one embodiment, the dashed box F5.1 is not present and the dashed box F5.3 is present.

[0348] As one embodiment, the dashed box F5.1 and the dashed box F5.3 are optional.

[0349] As one sub-embodiment of the above embodiment, the dashed box F5.1 and the dashed box F5.3 are not present at the same time.

[0350] As one sub-embodiment of the above embodiment, when the dashed box F5.1 is present, then the dashed box F5.3 is not present.

[0351] As one sub-embodiment of the above embodiment, when the dashed box F5.3 is present, then the dashed box F5.1 is not present.

[0352] As one sub-embodiment of the above embodiment, when the dashed box F5.1 is present, then the dashed box F5.3 is optional.

[0353] As one embodiment, whether the dashed box F5.1 is present or not depends on whether the target operation is the first candidate.

[0354] As one embodiment, the existence of the dashed box F5.2 depends on whether the target operation is the first candidate.

[0355] As one embodiment, the existence of the dashed box F5.3 depends on whether the target operation is the second candidate.

[0356] As one embodiment, the dashed box F5.1 exists when the target operation is the first candidate.

[0357] As one embodiment, the dashed box F5.1 does not exist when the target operation is the second candidate.

[0358] As one embodiment, the dashed box F5.3 exists when the target operation is the second candidate.

[0359] As one embodiment, the first message is sent through SRB1.

[0360] As one embodiment, the first message is sent through any one of SRB1 or SRB3.

[0361] As one embodiment, the first message is sent through any one of SRB1 or SRB3 or a non-direct connection path.

[0362] As one embodiment, in response to expiration of the first timer, RRC connection reestablishment is performed.

[0363] As one embodiment, in response to expiration of the first timer, radio link failure is determined.

[0364] As one embodiment, in response to expiration of the first timer, RRC_IDLE state is entered.

[0365] As one embodiment, in response to expiration of the first timer, RRC_INACTIVE state is entered.

[0366] As one embodiment, in response to expiration of the first timer, the second candidate is performed.

[0367] As one embodiment, in response to expiration of the first timer, the first message is resent.

[0368] As one subembodiment of the above embodiment, in response to expiration of the first timer and no radio link failure, the first message is resent.

[0369] As one subembodiment of the above embodiment, the resending of the first message refers to retransmission of the first message.

[0370] As a sub-example of the above embodiment, the re-sending the first message refers to updating the first message and re-sending the first message.

[0371] As a sub-example of the above embodiment, the updating the first message relies on an output of an AI module.

[0372] As an example, the first timer is a Response Window.

[0373] As an example, the first timer is a T300 timer.

[0374] As an example, a value of the first timer depends on the first time length.

[0375] As an example, the first timer depends on the first information.

[0376] As a sub-example of the above embodiment, starting the first timer is in response to sending the first message.

[0377] As a sub-example of the above embodiment, a value of the first timer depends on the first message.

[0378] As an example, starting or restarting the first timer is in response to sending the first message.

[0379] As an example, sending the first message is in response to starting or restarting the first timer.

[0380] As an example, starting the first timer in response to the first message refers to starting or restarting the first timer in response to successful sending of the first message.

[0381] As an example, starting the first timer in response to the first message refers to starting or restarting the first timer when the sending of the first message is completed.

[0382] As an example, stopping the first timer is in response to a radio link failure when the first timer is running.

[0383] As an example, performing the second candidate is in response to a radio link failure when the first timer is running.

[0384] As an example, storing or updating the first UE variable is in response to a radio link failure when the first timer is running.

[0385] As a sub-embodiment of the above embodiment, the storing or updating the first UE variable refers to updating or storing as the first UE variable using all or part of the fields in the first message.

[0386] As a sub-embodiment of the above embodiment, the first UE variable includes a Model ID of the AI module.

[0387] As a sub-embodiment of the above embodiment, the first variable includes the first message, which indicates a Model ID of the AI module.

[0388] As a sub-embodiment of the above embodiment, the first candidate includes storing or updating the first UE variable in response to a wireless link failure occurring while the first timer is running.

[0389] As an embodiment, the determination of the wireless link failure is not performed in response to the first timer being running.

[0390] As an embodiment, the determination of the wireless link failure is started in response to the first timer not being running.

[0391] As an embodiment, the determination of the wireless link failure is not allowed in response to the first timer being running.

[0392] As an embodiment, the determination of the wireless link failure is allowed in response to the first timer not being running.

[0393] As an embodiment, a second timer is started in response to receiving the second message.

[0394] As an embodiment, the second message is received on the first serving cell.

[0395] As an embodiment, the second message is an RRC reconfiguration message.

[0396] As an embodiment, the second message is a handover command.

[0397] As a sub-embodiment of the above embodiment, the second message is an L3 handover configuration.

[0398] As a sub-embodiment of the above embodiment, the second message is a conditional handover configuration.

[0399] As a sub-embodiment of the above embodiment, the second message is an LTM cell handover configuration.

[0400] As a subembodiment of the above embodiment, the second timer is a T304 timer.

[0401] As an embodiment, the second message is an RRC Connection Reestablishment message.

[0402] As an embodiment, the second message is an RRCReestablishment message.

[0403] As a subembodiment of the above embodiment, the first message is an RRCReestablishmentRequest message.

[0404] As a subembodiment of the above embodiment, the first timer is a T301 timer.

[0405] As a subembodiment of the above embodiment, the second timer is a T311 timer.

[0406] As an embodiment, the second message is an RRC Release message.

[0407] As an embodiment, the second message is an RRCRelease message.

[0408] As a subembodiment of the above embodiment, the first message is a measurement report.

[0409] As a subembodiment of the above embodiment, the first message is a prediction report.

[0410] As a subembodiment of the above embodiment, the first message includes measurement results.

[0411] As a subembodiment of the above embodiment, the first message includes prediction results.

[0412] As a subembodiment of the above embodiment, the second timer is a T380 timer.

[0413] As an embodiment, the second message is an RRC Reject message.

[0414] As an embodiment, the second message is an RRCReject message.

[0415] As a subembodiment of the above embodiment, the first message is an RRCSetupRequest message.

[0416] As a subembodiment of the above embodiment, the first timer is a T300 timer.

[0417] As one subembodiment of the above embodiment, the second timer is a T302 timer.

[0418] As one subembodiment of the above embodiment, the second timer is a T325 timer.

[0419] As one subembodiment of the above embodiment, the second timer is a T331 timer.

[0420] As one embodiment, in response to receiving the second message, the first timer is stopped.

[0421] Embodiment 6

[0422] Embodiment 6 illustrates a diagram of a relationship of a target operation and a radio link failure monitoring parameter according to one embodiment of the application, as shown in FIG. 6.

[0423] In Embodiment 6, the target operation is the first candidate or the second candidate depending on a status of a radio link failure monitoring parameter; the radio link failure monitoring parameter is used to determine a radio link failure.

[0424] As one embodiment, the target operation is the first candidate or the second candidate depending on the first time interval and the target operation is the first candidate or the second candidate depending on the status of the radio link failure monitoring parameter.

[0425] As one embodiment, the target operation is the first candidate or the second candidate depending on the first time interval and the target operation is the first candidate or the second candidate depending on the status of the radio link failure monitoring parameter means that:

[0426] the target operation is the first candidate when at least the first time interval satisfies the first time length and the status of the radio link failure monitoring parameter satisfies the first threshold;

[0427] the target operation is the second candidate when the first time interval does not satisfy the first time length or the status of the radio link failure monitoring parameter does not satisfy the first threshold.

[0428] As one embodiment, the target operation is the first candidate or the second candidate depending on the first time interval and the target operation is the first candidate or the second candidate depending on the status of the radio link failure monitoring parameter means that:

[0429] the target operation is the first candidate when at least the first time interval satisfies the first time length and the status of the radio link failure monitoring parameter satisfies the first threshold;

[0430] The target operation is the second candidate when the first time interval does not satisfy the first time length or the status of the radio link failure monitoring parameter satisfies the first threshold or determines the radio link failure.

[0431] As one embodiment, the first threshold is pre-configured.

[0432] As one embodiment, the first threshold is configured by an RRC message.

[0433] As one sub-embodiment of the above embodiment, the first RRC message configures a value of the first threshold.

[0434] As one sub-embodiment of the above embodiment, the first RRC message configures a first coefficient, and the first threshold depends on the first coefficient.

[0435] As one embodiment, the first threshold depends on an output of an AI module.

[0436] As one embodiment, in response to determining the radio link failure, a first field in a first UE variable is set.

[0437] As one sub-embodiment of the above embodiment, the first UE variable is VarRLF-Report.

[0438] As one sub-embodiment of the above embodiment, the first UE variable is rlf-Report.

[0439] As one sub-embodiment of the above embodiment, the first field is rlf-Cause.

[0440] As one embodiment, the radio link failure monitoring parameter is T310; and the status of the radio link failure monitoring parameter is a current value of the T310.

[0441] As one sub-embodiment of the above embodiment, that the status of the radio link failure monitoring parameter satisfies the first threshold means that the current value of the T310 is greater than the first threshold.

[0442] As one sub-embodiment of the above embodiment, that the status of the radio link failure monitoring parameter satisfies the first threshold means that the current value of the T310 is not less than the first threshold.

[0443] As one sub-embodiment of the above embodiment, in response to determining the radio link failure, the first field is set to t310-Expiry.

[0444] As one sub-em embodiment of the above embodiment, the first threshold is a maximum value of the T310.

[0445] As one sub-em embodiment of the above embodiment, the first threshold is a maximum value of the T310.

[0446] As one sub-em embodiment of the above embodiment, the first threshold is a maximum value of the T310.

[0447] As one sub-em embodiment of the above embodiment, the first threshold is a maximum value of the T310.

[0448] As one sub-em embodiment of the above embodiment, the first threshold is a maximum value of the T310.

[0449] As one sub-em embodiment of the above embodiment, the first threshold is a maximum value of the T310.

[0450] As one sub-em embodiment of the above embodiment, the first threshold is a maximum value of the T310.

[0451] As one sub-em embodiment of the above embodiment, the first threshold is a maximum value of the T310.

[0452] As one sub-em embodiment of the above embodiment, the first threshold is a maximum value of the T310.

[0453] As one sub-em embodiment of the above embodiment, the first threshold is a maximum value of the T310.

[0454] As one sub-em embodiment of the above embodiment, the first threshold is a maximum value of the T310.

[0455] As one sub-example of the above embodiment, as a response to determining the radio link failure, the first field is set to randomAccessProblem.

[0456] As one sub-example of the above embodiment, the first threshold is preambleTransMax+1.

[0457] As one sub-example of the above embodiment, the first threshold is preambleTransMax.

[0458] As one sub-example of the above embodiment, the first threshold is equal to a product of the preambleTransMax+1 and the first coefficient.

[0459] As one sub-example of the above embodiment, the first threshold is equal to a product of the preambleTransMax and the first coefficient.

[0460] As one embodiment, the radio link failure monitoring parameter is RETX_COUNT; the status of the radio link failure monitoring parameter is a current value of the RETX_COUNT.

[0461] As one sub-example of the above embodiment, the status of the radio link failure monitoring parameter satisfies the first threshold means that the current value of the RETX_COUNT is less than the first threshold.

[0462] As one sub-example of the above embodiment, the status of the radio link failure monitoring parameter satisfies the first threshold means that the current value of the RETX_COUNT is not greater than the first threshold.

[0463] As one sub-example of the above embodiment, as a response to determining the radio link failure, the first field is set to rlc-MaxNumRetx.

[0464] As one sub-example of the above embodiment, the first threshold is maxRetxThreshold.

[0465] As one sub-example of the above embodiment, the first threshold is equal to a product of the maxRetxThreshold and the first coefficient.

[0466] Embodiment 7

[0467] Embodiment 7 illustrates a schematic diagram of the second candidate according to one embodiment of the present application, as shown in FIG. 7.

[0468] In embodiment 7, the second candidate comprises an RRC connection reestablishment; the RRC connection reestablishment comprises a cell selection.

[0469] As one embodiment, the second candidate comprises an RRC connection reestablishment, the RRC connection reestablishment comprises the cell selection.

[0470] As one embodiment, the second candidate comprises initiating the RRC connection reestablishment.

[0471] As one sub-embodiment of the above embodiment, the initiating the RRC connection reestablishment comprises: if a T310 timer is running, stopping the T310 timer.

[0472] As one sub-embodiment of the above embodiment, the initiating the RRC connection reestablishment comprises: if a T312 timer is running, stopping the T312 timer.

[0473] As one sub-embodiment of the above embodiment, the initiating the RRC connection reestablishment comprises: if a T304 timer is running, stopping the T304 timer.

[0474] As one sub-embodiment of the above embodiment, the initiating the RRC connection reestablishment comprises: initiating a T311 timer.

[0475] As one sub-embodiment of the above embodiment, the initiating the RRC connection reestablishment comprises: if a T316 timer is running, stopping the T316 timer.

[0476] As one sub-embodiment of the above embodiment, the initiating the RRC connection reestablishment comprises resetting a MAC.

[0477] As one sub-embodiment of the above embodiment, the initiating the RRC connection reestablishment comprises releasing a spCellConfig configuration.

[0478] As one sub-embodiment of the above embodiment, the initiating the RRC connection reestablishment comprises suspending all RBs except SRB0 and broadcast MRB.

[0479] As one sub-embodiment of the above embodiment, the initiating the RRC connection reestablishment comprises performing a cell selection.

[0480] As one embodiment, if the T311 timer is running, in response to successfully selecting a suitable cell in the cell selection, preparing to interact with the suitable cell.

[0481] As one sub-embodiment of the above embodiment, the preparing to interact with the suitable cell comprises: ensuring to have valid and up-to-date system information of the suitable cell.

[0482] As one subembodiment of the above embodiment, the preparing for interaction with a suitable cell comprises stopping the T311 timer.

[0483] As one subembodiment of the above embodiment, the preparing for interaction with a suitable cell comprises starting a T301 timer.

[0484] As one subembodiment of the above embodiment, the preparing for interaction with a suitable cell comprises applying physical layer default L1 parameters unless parameters provided in SIB1.

[0485] As one subembodiment of the above embodiment, the preparing for interaction with a suitable cell comprises applying default MAC cell group configuration.

[0486] As one subembodiment of the above embodiment, the preparing for interaction with a suitable cell comprises applying CCCH configuration.

[0487] As one subembodiment of the above embodiment, the preparing for interaction with a suitable cell comprises applying timeAlignmentTimerCommon in SIB1.

[0488] As one subembodiment of the above embodiment, the preparing for interaction with a suitable cell comprises preparing for transmission of a RRCReestablishmentRequest message.

[0489] As one embodiment, if the T311 timer is not running and no suitable cell is selected in the cell selection, set noSuitableCellFound in VarRLF-Report to true and perform the related operation of transitioning to RRC_IDLE state.

[0490] As one embodiment, the RRC reestablishment comprises transmission of a RRCReestablishmentRequest message; the transmission of the RRCReestablishmentRequest message comprises setting the content of the RRCReestablishmentRequest message.

[0491] As one subembodiment of the above embodiment, setting c-RNTI in ue-Identify to the C-RNTI used in the first serving cell.

[0492] As one subembodiment of the above embodiment, setting physCellId in ue-Identify to the physical cell ID of the first serving cell.

[0493] As one sub-example of the above embodiment, the setting the RRCReestablishmentRequest message includes setting reestablishmentCause to otherFailure.

[0494] As one sub-example of the above embodiment, reestablishing PDCP of SRB1.

[0495] As one sub-example of the above embodiment, the transmission of the RRCReestablishmentRequest message includes submitting the RRCReestablishmentRequest message to a lower layer.

[0496] As one embodiment, the RRC connection reestablishment includes, in response to sending the RRCReestablishmentRequest message, receiving an RRCReestablishment message.

[0497] As one sub-example of the above embodiment, in response to receiving the RRCReestablishment message, stopping the T301 timer.

[0498] As one sub-example of the above embodiment, in response to receiving the RRCReestablishment message, considering the current cell as a PCell.

[0499] As one sub-example of the above embodiment, in response to receiving the RRCReestablishment message, updating KgNB.

[0500] As one sub-example of the above embodiment, in response to receiving the RRCReestablishment message, preparing for transmission of an RRCReestablishmentComplete message.

[0501] As one sub-example of the above embodiment, in response to receiving the RRCReestablishment message, submitting the RRCReestablishmentComplete message to a lower layer.

[0502] Embodiment 8

[0503] Embodiment 8 illustrates a diagram of a first candidate and a second candidate according to one embodiment of the application, as shown in FIG. 8.

[0504] In embodiment 8, the first candidate does not include determining radio link failure, and the second candidate includes determining radio link failure.

[0505] As one embodiment, the determining radio link failure is considering that the MCG is detected to have RLF.

[0506] As one embodiment, the first candidate does not include determining radio link failure, and the first candidate includes sending the first message; the second candidate includes determining radio link failure, and the second candidate includes cell selection.

[0507] As one embodiment, the first candidate does not include determining radio link failure, and the first candidate includes sending the first message; the second candidate includes determining radio link failure, and the second candidate includes RRC re-establishment.

[0508] As one embodiment, the first candidate does not include determining radio link failure, and the first candidate includes sending the first message; the second candidate includes determining radio link failure, and the second candidate includes RRC re-establishment and the cell selection.

[0509] As one embodiment, the first candidate includes sending the first message, and before the first message is sent, radio link failure is not determined.

[0510] As one embodiment, the first candidate includes sending the first message when radio link failure does not occur.

[0511] As one sub-embodiment of the above-mentioned embodiment, as receiving the second message, the radio link failure monitoring parameter is continued.

[0512] As one embodiment, the second candidate includes determining radio link failure and the cell selection.

[0513] As one embodiment, the second candidate includes determining radio link failure, RRC connection re-establishment and the cell selection.

[0514] As one embodiment, the second candidate includes determining radio link failure and RRC connection re-establishment, and the RRC connection re-establishment includes the cell selection.

[0515] As one embodiment, the second candidate includes not sending the first message in response to determining the radio link failure.

[0516] As one embodiment, the second candidate includes continuing the current operation.

[0517] As one embodiment, suspending the radio link failure monitoring parameters in response to the successful transmission of the first message.

[0518] As one embodiment, the first candidate not including determining radio link failure implies that, in response to the execution of the first candidate, the determination of the radio link failure is not performed.

[0519] As one embodiment, the first candidate not including determining radio link failure implies that, in response to the execution of the first candidate, the monitoring of the related parameters of the radio link failure is suspended.

[0520] As one embodiment, the second candidate including determining radio link failure implies that, in response to the execution of the second candidate, the determination of the radio link failure is performed.

[0521] As one embodiment, the second candidate including determining radio link failure implies that, in response to the execution of the second candidate, the monitoring of the parameters of the radio link failure is continued.

[0522] As one embodiment, the second candidate including determining radio link failure implies that, in response to the execution of the second candidate, the triggering of a possible radio link failure is allowed.

[0523] As one embodiment, the suspending the monitoring of the related parameters of the radio link failure implies stopping a related timer.

[0524] As one sub-embodiment of the above embodiment, the suspending the monitoring of the related parameters of the radio link failure implies stopping the T310 timer.

[0525] As one sub-embodiment of the above embodiment, the suspending the monitoring of the related parameters of the radio link failure implies stopping the T312 timer.

[0526] As one embodiment, the suspending the monitoring of the related parameters of the radio link failure implies resetting the related parameters.

[0527] As one sub-embodiment of the above embodiment, the suspending the monitoring of the related parameters of the radio link failure implies a MAC reset.

[0528] As one sub-embodiment of the above embodiment, the suspending the monitoring of the related parameters of the radio link failure implies a N311 counter reset.

[0529] As one sub-embodiment of the above embodiment, the suspending the monitoring of the related parameters of the radio link failure implies keeping the value of the N311 counter.

[0530] Embodiment 9

[0531] Embodiment 9 illustrates another scenario of a first candidate and a second candidate according to another embodiment of the present application, as shown in FIG. 9.

[0532] In Embodiment 9, neither the first candidate nor the second candidate includes determining radio link failure.

[0533] As one embodiment, the first candidate includes sending the first message; the second candidate does not include sending the first message.

[0534] As one embodiment, the first candidate not including determining the radio link failure means that, as a response to sending the first message, no determination of the radio link failure is performed.

[0535] As one embodiment, the second candidate not including determining the radio link failure means that the second candidate does not include sending the first message, and does not include the determination of the radio link failure.

[0536] As one embodiment, neither the first candidate nor the second candidate including determining radio link failure means that the undetermined radio link failure is a prerequisite for the first candidate and the second candidate.

[0537] As one embodiment, within a time interval from predicting radio link failure to sending the first message, the terminal does not determine radio link failure; the target operation is the first candidate.

[0538] As one embodiment, within a time interval from predicting radio link failure to cell selection, the terminal does not determine radio link failure; the target operation is the second candidate.

[0539] As one embodiment, when at least the first time interval satisfies a first time length and the terminal does not determine radio link failure, the target operation is the first candidate.

[0540] As one embodiment, when at least the first time interval does not satisfy a first time length and the terminal does not determine radio link failure, the target operation is the second candidate.

[0541] As one embodiment, if radio link failure occurs, the first candidate and the second candidate are not performed.

[0542] Embodiment 10

[0543] Embodiment 10 illustrates a structural block diagram of a processing apparatus in a terminal according to an embodiment of the present application; as shown in Figure 10. In Figure 10, the terminal 1000 comprises a first transmitter 1001 and a first processor 1002.

[0544] The first processor 1002 performs a target operation in response to the prediction of the radio link failure; wherein candidates of the target operation comprise a first candidate and a second candidate; the first candidate comprises sending a first message on a first serving cell, the second candidate does not comprise sending the first message on the first serving cell;

[0545] In Embodiment 10, whether the target operation is the first candidate or the second candidate depends on at least a first time interval, the first time interval is related to at least one of the time of the prediction of the radio link failure and the time of the predicted radio link failure;

[0546] Wherein, whether the target operation is the first candidate or the second candidate depends on the first time interval comprises:

[0547] When at least the first time interval satisfies a first time length, the target operation is the first candidate;

[0548] When the first time interval does not satisfy the first time length, the target operation is the second candidate.

[0549] As an embodiment, the first transmitter 1001 sends the first message on the first serving cell; wherein the target operation is the first candidate.

[0550] As an embodiment, the first processor 1002 comprises a first receiver.

[0551] As an embodiment, whether the target operation is the first candidate or the second candidate depends on a state of a radio link failure monitoring parameter; the radio link failure monitoring parameter is used to determine a radio link failure.

[0552] As an embodiment, the second candidate comprises an RRC connection reestablishment; the RRC connection reestablishment comprises cell selection.

[0553] As an embodiment, the first candidate does not comprise determining a radio link failure, and the second candidate comprises determining a radio link failure.

[0554] As an embodiment, neither the first candidate nor the second candidate comprises determining a radio link failure.

[0555] As one embodiment, the first processing machine 1002, in conjunction with the first message, starts a first timer; in response to receiving a second message, stops the first timer; wherein the target operation is the first candidate; the second message is received while the first timer is running.

[0556] As one embodiment, the terminal includes one or more processors and a memory; the memory is coupled to the one or more processors; the memory is configured to store computer program codes; the computer program codes include computer instructions; the one or more processors invoke the computer instructions to cause the terminal to perform the method for terminal in the present application.

[0557] As one embodiment, the first receiver includes at least one of the antenna 452 or the receiver 454 or the multi-antenna receiving processor 458 or the receiving processor 456 or the controller / processor 459 or the memory 460 or the data source 467 in FIG.4 of the present application.

[0558] As one embodiment, the first receiver includes at least the antenna 452 and the receiver 454 in FIG.4 of the present application.

[0559] As one embodiment, the first transmitter 1001 includes at least one of the antenna 452 or the transmitter 454 or the multi-antenna transmitting processor 457 or the transmitting processor 468 or the controller / processor 459 or the memory 460 or the data source 467 in FIG.4 of the present application.

[0560] As one embodiment, the first transmitter 1001 includes at least the antenna 452 and the transmitter 454 in FIG.4 of the present application.

[0561] Embodiment 11

[0562] Embodiment 11 illustrates a structural block diagram of a processing device for use in a base station according to one embodiment of the present application; as shown in FIG.11. In FIG.11, the base station 1100 includes a second transmitter 1101 and a second receiver 1102.

[0563] The second receiver 1102 receives a first message;

[0564] In Example 11, as a response to the sender of the first message predicting a radio link failure, the sender of the first message performs a target operation; the candidates for the target operation include a first candidate and a second candidate; the first candidate includes sending the first message on a first serving cell, and the second candidate does not include sending the first message on the serving cell of the terminal; whether the target operation is the first candidate or the second candidate depends on at least a first time interval, the first time interval being related to at least one of the time of predicting the radio link failure and the time of the predicted radio link failure; whether the target operation is the first candidate or the second candidate depends on the first time interval including: when at least the first time interval satisfies a first time length, the target operation is the first candidate; when the first time interval does not satisfy the first time length, the target operation is the second candidate.

[0565] As an example, whether the target operation is the first candidate or the second candidate depends on the state of the wireless link failure monitoring parameters; the wireless link failure monitoring parameters are used to determine wireless link failure.

[0566] As one embodiment, the second candidate includes RRC connection re-establishment; the RRC connection re-establishment includes cell selection.

[0567] As an example, the first candidate does not include determining that the wireless link has failed, while the second candidate does include determining that the wireless link has failed.

[0568] As an example, neither the first candidate nor the second candidate includes determining that the wireless link has failed.

[0569] As one embodiment, along with the first message, the sender of the first message starts a first timer; in response to sending a second message, the sender of the first message stops the first timer; the target operation is the first candidate; the second message is sent while the first timer is running.

[0570] As one embodiment, the base station includes: one or more processors and a memory; the memory is coupled to the one or more processors, the memory is used to store computer program code, the computer program code including computer instructions, and the one or more processors call the computer instructions to cause the base station to perform the method described in this application for use in a base station.

[0571] As one embodiment, the second transmitter 1101 includes at least one of the following in Figure 4 of this application: antenna 420, transmitter 418, multi-antenna transmitter processor 471, transmitter processor 416, controller / processor 475, or memory 476.

[0572] As one embodiment, the second transmitter 1101 comprises at least one of the antenna 420 and the transmitter 418 in FIG.4 of this application.

[0573] As one embodiment, the second receiver 1102 comprises at least one of the antenna 420 or the receiver 418 or the multi-antenna reception processor 472 or the reception processor 470 or the controller / processor 475 or the memory 476 in FIG.4 of this application.

[0574] As one embodiment, the second receiver 1102 comprises at least one of the antenna 420 and the receiver 418 in FIG.4 of this application.

[0575] Embodiment 12

[0576] Embodiment 12 illustrates a schematic diagram of an artificial intelligence or machine learning based processing system according to one embodiment of the present application, as shown in FIG.12. FIG.12 comprises a first module, a second module, a third module, a fourth module and a fifth module.

[0577] In embodiment 12, the first module sends a first data set to the second module, the first module sends a second data set to the third module, the first module sends a third data set to the fifth module, the fifth module sends a first type of parameter set to the second module, the fifth module sends a second type of parameter set to the third module, the fifth module sends a third type of parameter set to the fourth module, the second module sends a fourth type of parameter set to the fourth module, and the fourth module sends a fifth type of parameter set to the third module.

[0578] As one embodiment, the first module, the second module, the third module, the fourth module and the fifth module all belong to the terminal.

[0579] The above method avoids air interface signaling interaction and shortens transmission delay.

[0580] As one embodiment, any one of the first module, the second module, the third module, the fourth module and the fifth module does not belong to the terminal.

[0581] The above method reduces the hardware complexity of the terminal.

[0582] As one embodiment, at least the first module of the first module, the second module, the third module, the fourth module and the fifth module belongs to the terminal; and at least one of the first module, the second module, the third module, the fourth module and the fifth module does not belong to the terminal.

[0583] The above method balances the hardware complexity of the terminal and the transmission delay.

[0584] As one embodiment, the first module is for data collection.

[0585] As one embodiment, the first module is responsible for data collection.

[0586] As one embodiment, the first module has a data collection function.

[0587] As one embodiment, the second module is for model training.

[0588] As one embodiment, the second module is responsible for model training.

[0589] As one embodiment, the second module has a model training function.

[0590] As one embodiment, the second module performs AI / ML model training.

[0591] As one embodiment, the second module performs validation.

[0592] As one embodiment, the second module performs testing.

[0593] As one embodiment, the second module generates model performance metrics.

[0594] As one embodiment, the second module is responsible for data preparation.

[0595] As one embodiment, the data preparation includes at least one of data pre-processing or cleaning or formatting or transformation.

[0596] As one embodiment, the third module is for inference.

[0597] As one embodiment, the third module has an inference function.

[0598] As one embodiment, the third module is responsible for inference.

[0599] As an embodiment, the fourth module is for model storage.

[0600] As an embodiment, the fourth module has a model storage function.

[0601] As an embodiment, the fourth module is responsible for storing trained models.

[0602] As an embodiment, the fourth module is responsible for storing trained models that can be used to perform inference processing.

[0603] As an embodiment, the fifth module is for management.

[0604] As an embodiment, the fifth module is responsible for management.

[0605] As an embodiment, the fifth module has a management function.

[0606] As an embodiment, the first data set is training data.

[0607] As an embodiment, the second data set is inference data.

[0608] As an embodiment, the third data set is monitoring data.

[0609] As an embodiment, the first type of parameter set includes monitoring output.

[0610] As an embodiment, the second type of parameter set includes management instructions.

[0611] As an embodiment, the second type of parameter set is used for fine-tuning operations of inference functions.

[0612] As an embodiment, the second type of parameter set includes the identity of a model.

[0613] As an embodiment, the second type of parameter set is used to select a model.

[0614] As an embodiment, the second type of parameter set is used to switch models.

[0615] As an embodiment, the second type of parameter set is used to activate / deactivate models.

[0616] As one embodiment, the second type of parameter set is used to fallback from an AI-ML operation to a non-AI-ML operation.

[0617] As one embodiment, the third type of parameter set includes a Model Transfer Request.

[0618] As one embodiment, the third type of parameter set includes a Model Delivery Request.

[0619] As one embodiment, the fourth type of parameter set includes a Trained Model.

[0620] As one embodiment, the fourth type of parameter set includes an Updated Model.

[0621] As one embodiment, the fourth type of parameter set indicates an identity of a model.

[0622] As one embodiment, the fifth type of parameter set includes a Model Transfer.

[0623] As one embodiment, the fifth type of parameter set includes a Model Delivery.

[0624] As one embodiment, the fifth type of parameter set indicates an identity of a model.

[0625] As one embodiment, the first type of output includes a monitoring output.

[0626] As one embodiment, the first type of output is present.

[0627] As one embodiment, the first type of output is not present.

[0628] As one embodiment, the second type of output includes an Inference Output.

[0629] As one embodiment, the second type of output is used by the fifth module to monitor performance of an AI / ML model.

[0630] As one embodiment, the second type of output is used by the fifth module to monitor performance of an AI / ML function.

[0631] As one embodiment, the second type of output is present.

[0632] As one embodiment, the second type of output is not present.

[0633] As one embodiment, the artificial intelligence processing system generates or assists in generating the first message or an update to the first message or the first threshold or the prediction result or a probability density distribution function of the predicted radio link failure or a cumulative distribution function of the predicted radio link failure probability or the first time length or a determination of whether the target operation is the first candidate or the second candidate.

[0634] As one embodiment, the fifth module generates or assists in generating the first message or an update to the first message or the first threshold or the prediction result or a probability density distribution function of the predicted radio link failure or a cumulative distribution function of the predicted radio link failure probability or the first time length or a determination of whether the target operation is the first candidate or the second candidate.

[0635] As one embodiment, the third module generates or assists in generating the first message or an update to the first message or the first threshold or the prediction result or a probability density distribution function of the predicted radio link failure or a cumulative distribution function of the predicted radio link failure probability or the first time length or a determination of whether the target operation is the first candidate or the second candidate.

[0636] As one embodiment, the second type of output includes the first message or an update to the first message or the first threshold or the prediction result or a probability density distribution function of the predicted radio link failure or a cumulative distribution function of the predicted radio link failure probability or the first time length or a determination of whether the target operation is the first candidate or the second candidate.

[0637] As one embodiment, at least one of the first data set or the second data set includes the measurement result.

[0638] As one embodiment, at least one of the first data set or the second data set includes the first UE variable.

[0639] As one embodiment, at least one of the first data set or the second data set includes the first message.

[0640] As one embodiment, at least one of the first data set or the second data set or the third data set includes the measurement result.

[0641] As one embodiment, at least one of the first data set or the second data set or the third data set includes the first UE variable.

[0642] As one embodiment, at least one of the first data set or the second data set or the third data set comprises the first message.

[0643] As one embodiment, the embodiment 12 is only for illustrating that the present application can be applied to the artificial intelligence processing system, the embodiment does not limit that the present application is applied to the non-artificial intelligence processing system, and the embodiment does not limit that the present application is applied to other types of artificial intelligence processing systems to achieve the effect equivalent to the artificial intelligence processing system shown in the figure 12.

[0644] Embodiment 13

[0645] The embodiment 13 illustrates a schematic diagram of RAN (Radio Access Network, wireless access network) domain (Domain) AI / ML function deployment according to one embodiment of the present application; as shown in the figure 13. The gNB in the embodiment 13 can be replaced by network equipment such as eNB, or 6G base station, etc.

[0646] The AI / ML related functions include ML training function (also called AI training, or AI / ML training), ML testing function, ML inference function (also called AI inference, or AI / ML inference), etc. The ML training function, the ML testing function, and the ML inference function can be independently deployed, or can be co-located deployed. The deployment of the AI / ML related functions can be realized by software, such as the download and / or running of executable files; or can be realized by the combination of software and hardware, such as accelerating the calculation by hardware to improve the operation speed or save the power consumption.

[0647] For the ML training function, it can be deployed in the cross-domain management system, or the domain-specific management system for managing the RAN domain or the CN (Core Network, core network) domain. For example, the ML training function for MDA (Management Data Analytics, management data analysis) can be deployed in the MDAF (MDA function); the ML training for network data analysis can be deployed in the NWDAF (Network Data Analytics Function, network data function), that is, the ML training function is MTLF (Model Training logical function, model training logical function).

[0648] For the ML inference function, it can also be deployed in the cross-domain management system or the domain-specific management system; for example, the ML inference function is the MDAF, or the ML inference function is the AnLF (Analytics logical function) located in the NWDAF.

[0649] Similarly, the ML test function can also be deployed in the cross-domain management system or the domain-specific management system.

[0650] In embodiment 13, the RAN domain ML training function 1302 is located in the RAN domain management function 1303; and the ML inference function is located in the base station, that is, the AI / ML inference function 1304 is located in the gNB 1305, the AI / ML inference function 1306 is located in the gNB 1307, and so on.

[0651] In FIG. 13, the management of the ML inference function of the plurality of base stations is completed by the RAN domain management function 1303, that is, data interaction is performed with the RAN domain MnS (Management Service) consumer / cross-domain management 1301 (as shown by the dashed arrow in FIG. 13).

[0652] Optionally, the management of the ML inference function can also be completed by the base station itself, that is, each base station can independently perform data interaction with the RAN domain MnS consumer / cross-domain management 1301.

[0653] It should be noted that embodiment 13 is only one non-limiting implementation; optionally, the ML training function of the RAN domain can also be deployed in the base station; or optionally, part of the base stations deploy the ML inference function and the ML training function of the RAN domain, and part of the base stations only deploy the ML inference function.

[0654] As an example, the gNB (or base station) in embodiment 2 is the base station of the application.

[0655] As an example, the first processing machine includes an AL / ML inference function in FIG. 13, that is, 1304 or 1306.

[0656] As an example, the second processing machine includes an AL / ML inference function in FIG. 13, that is, 1304 or 1306.

[0657] As an example, one of the AL / ML inference functions in FIG. 13 performs ML training according to the collected radio link failure data.

[0658] As an example, one of the AL / ML inference functions in FIG. 13 performs ML training according to the collected measurement results.

[0659] Embodiment 14

[0660] Embodiment 14 illustrates a schematic diagram of AI / ML function deployment of a UE according to an embodiment of the present application; as shown in FIG. 14. The RAN domain ML training function 1405 in FIG. 14 is optional.

[0661] The UE function 1404 is deployed in a terminal of the present application, which includes an AI / ML inference function 1406; the AI / ML inference function 1406 uses a ML model (also referred to as an AI model) for inference; a ML model is usually trained before being used for AI / ML inference.

[0662] As an embodiment, the UE function 1404 includes a RAN domain ML training function 1405, which runs training data through a ML model, derives a related loss, and adjusts parameters of the ML model based on the calculated loss; the ML training includes at least one of ML initial training, ML re-training, and reinforcement learning.

[0663] The above embodiments can reduce the complexity of the base station, or save the air interface resources caused by reporting training data; however, the above embodiments put forward higher requirements on the processing capability of the UE side.

[0664] Optionally, the UE function 1404 further includes a CN domain ML training function (not included in FIG. 14).

[0665] Optionally, the UE function 1404 further includes an AI / ML deployment function (not included in FIG. 14), which is used to load ML models and data.

[0666] As an embodiment, the terminal indicates whether it supports ML training function (RAN domain or CN domain) through capability reporting, and the capability reporting is RRC signaling or NAS (Non-Access Stratum) signaling.

[0667] As an embodiment, the ML model and related metadata are loaded by the terminal from a network device or a remote server.

[0668] Optionally, the UE function 1404 is a MnS producer providing data for management or analytics to the CN domain MnF (Management Function) 1401, and / or the RAN domain MnF 1402, and / or the cross-domain management system 1403 (as indicated by double arrow 1407).

[0669] Optionally, the UE function 1404 is a MnS consumer loading data for AI / ML related management, such as management data requests, ML model activation, and / or ML training, etc., from the CN domain MnF (Management Function) 1401, and / or the RAN domain MnF 1402, and / or the cross-domain management system 1403 (as indicated by double arrow 1407).

[0670] As an embodiment, the predicted radio link failure in the present application is obtained through inference of the AI / ML inference function 1406.

[0671] As an embodiment, the first message in the present application is obtained through inference of the AI / ML inference function 1406.

[0672] As an embodiment, the update of the first message in the present application is obtained through inference of the AI / ML inference function 1406.

[0673] As an embodiment, the first threshold in the present application is obtained through inference of the AI / ML inference function 1406.

[0674] As an embodiment, the prediction result in the present application is obtained through inference of the AI / ML inference function 1406.

[0675] As an embodiment, the predicted probability density distribution function of radio link failure in the present application is obtained through inference of the AI / ML inference function 1406.

[0676] As an embodiment, the predicted cumulative distribution function of radio link failure probability in the present application is obtained through inference of the AI / ML inference function 1406.

[0677] As an embodiment, the first time length in the present application is obtained through inference of the AI / ML inference function 1406.

[0678] As an embodiment, the determination of whether the target operation is the first candidate or the second candidate in this application is obtained through inference of the AI / ML inference function 1406.

[0679] As an embodiment, the first message or the update of the first message or the first threshold or the prediction result or the predicted probability density distribution function of radio link failure or the cumulative distribution function of the predicted radio link failure probability or the first time length or the determination of whether the target operation is the first candidate or the second candidate in this application is obtained through inference of the AI / ML inference function 1406.

[0680] As an embodiment, the first processing machine includes an AL / ML inference function 1406 in FIG. 14.

[0681] As an embodiment, the ML model is based on a neural network.

[0682] As an embodiment, the ML model is based on a CNN (Conventional Neural Networks).

[0683] As an embodiment, the ML model is based on a Transformer architecture.

[0684] Embodiment 15

[0685] Embodiment 15 illustrates a schematic diagram of an artificial intelligence or machine learning based processing system according to another embodiment of the present application; as shown in FIG. 15. FIG. 15 includes a third processing machine, a fourth processing machine, a fifth processing machine and a sixth processing machine.

[0686] In embodiment 15, the third processing machine sends a first data set to the fourth processing machine and a second data set to the fifth processing machine; the fourth processing machine generates a target first type parameter group according to the first data set, and the fourth processing machine sends the generated target first type parameter group to the fifth processing machine; the fifth processing machine processes the second data set using the target first type parameter group to obtain a first type output, and (optionally) the fifth processing machine sends the first type output to the sixth processing machine. In FIG. 15, the first type feedback and the second type feedback are optional; the fourth processing machine includes an ML training function; and the fifth processing machine includes an ML inference function.

[0687] As an embodiment, the sixth processing machine includes an ML testing function.

[0688] As one embodiment, the sixth handler comprises performance monitoring / evaluation of the ML model.

[0689] As one embodiment, the fifth handler sends first type feedback to the fourth handler, the first type feedback is used to trigger re-computation or update of the target first type parameter set, i.e. trigger ML initial training or ML re-training.

[0690] As one embodiment, the sixth handler sends second type feedback to the third handler, the second type feedback is used to generate the first data set or the second data set, or the second type feedback is used to trigger sending of the first data set or sending of the second data set.

[0691] As one embodiment, the third handler generates the first data set and the second data set according to measurements.

[0692] As one embodiment, the fifth handler belongs to the terminal, and the sixth handler belongs to the base station.

[0693] As one embodiment, the first type output comprises the predicted radio link failure.

[0694] As one embodiment, the first type output comprises the first message.

[0695] As one embodiment, the first type output comprises update of the first message.

[0696] As one embodiment, the first type output comprises the first threshold.

[0697] As one embodiment, the first type output comprises the prediction result.

[0698] As one embodiment, the first type output comprises a probability density distribution function of the predicted radio link failure.

[0699] As one embodiment, the first type output comprises a cumulative distribution function of the predicted radio link failure probability.

[0700] As one embodiment, the first type output comprises the first time length.

[0701] As one embodiment, the first type output comprises a judgment of whether the target operation is the first candidate or the second candidate.

[0702] As one embodiment, the second data set comprises measurements on reference signals.

[0703] As an example, the first dataset includes training data.

[0704] As an example, the fourth processor is used to train an ML model, and the trained model is described by the target first class of parameter sets.

[0705] As one embodiment, the fourth processor belongs to the terminal.

[0706] The above embodiments avoid transmitting the first dataset to the base station.

[0707] As one example, the fourth processor belongs to the base station.

[0708] The above embodiments support joint training and optimize system performance.

[0709] As an example, the fourth processor belongs to the core network.

[0710] The above embodiments support network-wide joint training, further optimizing system performance.

[0711] As an example, the second dataset includes inference data.

[0712] As one embodiment, the fifth processor belongs to the terminal.

[0713] As an example, the fifth processor constructs a model based on the target first type of parameter group, and then inputs the second dataset into the constructed model to obtain the first type of output.

[0714] As an example, the fifth processor generates a recovery dataset based on the first type of output, and the error between the recovery dataset and the second dataset is used to generate the first type of feedback.

[0715] As an example, the first type of feedback is used to reflect the performance of the trained model; when the performance of the trained model fails to meet the requirements, the fourth processing opportunity recalculates the target first type of parameter set.

[0716] As an example, when the error is too large or the update has not been performed for too long, the performance of the trained model is considered to be unsatisfactory.

[0717] As an example, the target first type of parameter group includes one or more of the following: convolution kernel size, number of convolution layers, convolution stride, pooling kernel size, pooling kernel stride, pooling function, activation function, or number of feature maps.

[0718] As an embodiment, the target first-type parameter group includes one or more of a convolution kernel, a pooling kernel, a pooling function, an activation function, a parameter of the pooling function, or a parameter of the activation function.

[0719] Those skilled in the art can understand that all or part of the steps in the foregoing method can be instructed to relevant hardware by a program, and the program can be stored in a computer readable storage medium, such as a read-only memory, a hard disk, an optical disk, or the like. Alternatively, all or part of the steps of the foregoing embodiments can also be implemented using one or more integrated circuits. Correspondingly, each module unit in the foregoing embodiments can be implemented in the form of hardware or in the form of a software function module, and the present application is not limited to any specific form of combination of software and hardware. The user equipment, terminal, and UE in the present application include but are not limited to a drone, a communication module on a drone, a remote control airplane, a flying vehicle, a small airplane, a mobile phone, a tablet computer, a notebook computer, a vehicle-mounted communication device, a wireless sensor, a network card, an Internet of Things terminal, an RFID (Radio Frequency Identification) terminal, an NB-IOT (Narrow Band Internet of Things) terminal, an MTC (Machine Type Communication) terminal, an eMTC (enhanced MTC) terminal, a data card, a network card, a vehicle-mounted communication device, a low-cost mobile phone, a low-cost tablet computer, and the like wireless communication devices. The base station or system device in the present application includes but is not limited to a macro cellular base station, a micro cellular base station, a home base station, a relay base station, a gNB (NR Node B) NR Node B, a TRP (Transmitter Receiver Point), and the like wireless communication devices.

[0720] The above describes only the preferred embodiments of the present application and is not intended to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method of a communication node for wireless communication, the method comprising: performing a target operation in response to a prediction of a radio link failure; wherein candidates of the target operation include a first candidate and a second candidate; the first candidate comprises transmitting a first message on a first serving cell, the second candidate does not comprise transmitting the first message on the first serving cell; wherein whether the target operation is the first candidate or the second candidate depends on at least a first time interval, the first time interval is related to at least one of a time of the prediction of the radio link failure and a time of the predicted radio link failure; wherein whether the target operation is the first candidate or the second candidate depending on the first time interval comprises: the target operation is the first candidate when at least the first time interval satisfies a first time length; the target operation is the second candidate when the first time interval does not satisfy the first time length. 2.The method of claim 1, wherein: whether the target operation is the first candidate or the second candidate depends on a status of a radio link failure monitoring parameter; the radio link failure monitoring parameter is used to determine the radio link failure. 3.The method of claim 1 or 2, wherein: the second candidate comprises an RRC connection re-establishment; the RRC connection re-establishment comprises a cell selection. 4.The method of any of claims 1-3, wherein: the first candidate does not comprise determining the radio link failure, the second candidate comprises determining the radio link failure. 5.The method of any of claims 1-4, wherein: neither the first candidate nor the second candidate comprises determining the radio link failure. 6.The method of any of claims 1-5, wherein: the method comprises: starting a first timer along with the first message; stopping the first timer in response to receiving a second message; wherein the target operation is the first candidate; the second message is received while the first timer is running. 7.A terminal, the terminal comprising: one or more processors and a memory; the memory is coupled to the one or more processors, the memory is configured to store computer program codes, the computer program codes comprise computer instructions, the one or more processors invoke the computer instructions to cause the terminal to perform the method of any of claims 1-6. comprising:

8. A method of a communication node used for wireless communication, characterized by, receiving a first message; ​ wherein, in response to the prediction of the radio link failure by the sender of the first message, the sender of the first message performs a target operation; candidates of the target operation include a first candidate and a second candidate; the first candidate comprises sending the first message on a first serving cell, and the second candidate does not comprise sending the first message on a serving cell of the first node; whether the target operation is the first candidate or the second candidate depends on at least a first time interval, the first time interval being related to at least one of a time of the prediction of the radio link failure and a time of the predicted radio link failure; wherein whether the target operation is the first candidate or the second candidate depending on the first time interval comprises: when at least the first time interval satisfies a first time length, the target operation is the first candidate; when the first time interval does not satisfy the first time length, the target operation is the second candidate.

9. The method of claim 8, wherein: whether the target operation is the first candidate or the second candidate depends on a status of a radio link failure monitoring parameter; the radio link failure monitoring parameter is used to determine a radio link failure.

10. The method of claim 8 or 9, wherein: the second candidate comprises an RRC connection re-establishment; the RRC connection re-establishment comprises a cell selection.

11. The method of any one of claims 8-10, wherein: the first candidate does not comprise determining a radio link failure, and the second candidate comprises determining a radio link failure.

12. The method of any one of claims 8-11, wherein: neither the first candidate nor the second candidate comprises determining a radio link failure.

13. The method of any one of claims 8-12, wherein: the sender of the first message starts a first timer in association with the first message; in response to sending a second message, the sender of the first message stops the first timer; wherein the target operation is the first candidate; the second message is sent when the first timer is running.

14. A base station, comprising: one or more processors and a memory; the memory is coupled to the one or more processors, and the memory is configured to store computer program codes, the computer program codes comprising computer instructions, the one or more processors invoking the computer instructions to cause the base station to perform the method of any one of claims 8-13.

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