Wireless communication method, terminal equipment and network equipment

Abstract

The invention provides a wireless communication method, terminal equipment and network equipment. The method comprises: during the operation of a first timer, a terminal device sends first information to a network device, the first information being used for indicating a prediction result of a radio link failure (RLF) occurring in a radio link between the terminal device and the network device determined based on a model; wherein the first timer is triggered based on a physical layer fault detected by the terminal device. In the embodiments of the present application, during the operation of a first timer triggered based on a physical fault detected by a terminal device, the terminal device sends first information to a network device, the first information being used for indicating a prediction result of RLF occurrence of a wireless link between the terminal device and the network device determined based on a model. Based on the first information, the network equipment is helped to improve the wireless link quality before the RLF occurs, so that interruption of data transmission caused by the RLF is avoided.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and more specifically, to a wireless communication method, terminal equipment and network equipment. Background Art

[0002] With the development of communication technology, model prediction technology has been widely used in the field of wireless communications. However, how to predict radio link failure (RLF) based on the model in the traditional wireless link monitoring process is an urgent problem to be solved. Summary of the invention

[0003] The present application provides a wireless communication method, terminal equipment and network equipment. The following introduces various aspects involved in the present application.

[0004] In a first aspect, a method for wireless communication is provided, comprising: during the operation of a first timer, a terminal device sends first information to a network device, the first information being used to indicate a predicted result of a radio link failure RLF occurring in a wireless link between the terminal device and the network device determined based on a model; wherein the first timer is triggered based on a physical layer fault detected by the terminal device.

[0005] In a second aspect, a method for wireless communication is provided, comprising: during the operation of a first timer, a network device receives first information sent by a terminal device, the first information being used to indicate a predicted result of a radio link failure RLF occurring in a wireless link between the terminal device and the network device determined based on a model; wherein the first timer is triggered based on a physical layer fault detected by the terminal device.

[0006] According to a third aspect, a terminal device is provided, comprising: a sending unit, used to send first information to a network device during the operation of a first timer, wherein the first information is used to indicate a predicted result of a radio link failure RLF occurring in a wireless link between the terminal device and the network device determined based on a model; wherein the first timer is triggered based on a physical layer fault detected by the terminal device.

[0007] In a fourth aspect, a network device is provided, comprising: a receiving unit, used to receive first information sent by a terminal device during the operation of a first timer, wherein the first information is used to indicate a predicted result of a radio link failure RLF occurring in a wireless link between the terminal device and the network device determined based on a model; wherein the first timer is triggered based on a physical layer fault detected by the terminal device.

[0008] In a fifth aspect, a terminal device is provided, comprising a processor, a memory and a communication interface, wherein the memory is used to store one or more computer programs, and the processor is used to call the computer programs in the memory so that the terminal device executes part or all of the steps in the method of the first aspect.

[0009] In a sixth aspect, a network device is provided, comprising a processor, a memory, and a transceiver, wherein the memory is used to store one or more computer programs, and the processor is used to call the computer programs in the memory so that the network device executes part or all of the steps in the method of the second aspect.

[0010] In a seventh aspect, an embodiment of the present application provides a communication system, which includes the above-mentioned terminal device and / or network device. In another possible design, the system may also include other devices that interact with the terminal device or network device in the solution provided by the embodiment of the present application.

[0011] In an eighth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, wherein the computer program enables a communication device (for example, a terminal device or a network device) to perform some or all of the steps in the methods of the above aspects.

[0012] In a ninth aspect, an embodiment of the present application provides a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to enable a communication device (e.g., a terminal device or a network device) to perform some or all of the steps in the above-mentioned various aspects of the method. In some implementations, the computer program product can be a software installation package.

[0013] In the tenth aspect, an embodiment of the present application provides a chip, which includes a memory and a processor. The processor can call and run a computer program from the memory to implement some or all of the steps described in the methods of the above aspects.

[0014] In an embodiment of the present application, during the operation of a first timer triggered by a physical fault detected by a terminal device, the terminal device sends first information to a network device, where the first information is used to indicate a prediction result of the occurrence of RLF in a wireless link between the terminal device and the network device determined based on a model. Based on the first information, the network device is helped to improve the quality of the wireless link before the RLF occurs, so as to avoid the interruption of data transmission caused by the RLF. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a wireless communication system 100 applied in an embodiment of the present application.

[0016] Figure 2 It is a schematic flow chart of the wireless link monitoring process.

[0017] Figure 3 It is a schematic flowchart of the RLF detection process applicable to the embodiment of the present application.

[0018] Figure 4 It is a schematic flowchart of another RLF detection process applicable to the embodiment of the present application.

[0019] Figure 5 It is a schematic flow chart of the RLF detection process of the secondary cell group (SCG) to which the embodiment of the present application is applicable.

[0020] Figure 6 It is a schematic flow chart of the RLF detection process of the master cell group (MCG) to which the embodiment of the present application is applicable.

[0021] Figure 7 It is a schematic flowchart of the wireless communication method provided in an embodiment of the present application.

[0022] Figure 8 is an example diagram of the first function and the probability of RLF occurring in the radio link determined based on the model.

[0023] Fig. 9 This is an example diagram of a combination scheme of the first information and the first configuration information.

[0024] Fig.10 is an example diagram of another combination of first information and first configuration information.

[0025] Fig.11 is an example diagram of a combination scheme of the first information and the second timer.

[0026] Fig.12 is an exemplary diagram of another combination of the first information and the second timer.

[0027] Fig.13 This is an example diagram of a combination of the first information, the second timer, and the third timer.

[0028] Fig.14 It is a schematic diagram of a terminal device according to an embodiment of the present application.

[0029] Fig.15 It is a schematic diagram of a network device according to an embodiment of the present application.

[0030] Fig.16 It is a schematic structural diagram of a communication device according to an embodiment of the present application. DETAILED DESCRIPTION

[0031] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0032] Wireless communication system

[0033] Figure 1 The wireless communication system 100 used in the embodiment of the present application may include a network device 110 and a terminal device 120. The network device 110 may be a device that communicates with the terminal device 120. The network device 110 may provide communication coverage for a specific geographical area and may communicate with the terminal device 120 located in the coverage area.

[0034] Figure 1 One network device and two terminals are shown exemplarily. Optionally, the wireless communication system 100 may include multiple network devices and each network device may include another number of terminal devices within its coverage area, which is not limited in the embodiments of the present application.

[0035] Optionally, the wireless communication system 100 may also include other network entities such as a network controller and a mobility management entity, which is not limited in the embodiments of the present application.

[0036] It should be understood that the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: the fifth generation (5th generation, 5G) system or new radio (new radio, NR), long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD), etc. The technical solutions provided by the present application can also be applied to future communication systems, such as the sixth generation mobile communication system, satellite communication system, and so on.

[0037] The terminal device in the embodiment of the present application may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), mobile terminal (MT), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device. The terminal device in the embodiment of the present application may be a device that provides voice and / or data connectivity to a user, and may be used to connect people, objects and machines, such as a handheld device with wireless connection function, a vehicle-mounted device, etc. The terminal device in the embodiment of the present application can be a mobile phone, a tablet computer, a laptop computer, a PDA, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc. Optionally, the UE can be used to act as a base station. For example, the UE can act as a scheduling entity that provides sidelink signals between UEs in V2X or D2D, etc. For example, a cellular phone and a car communicate with each other using a sidelink signal. The cellular phone and the smart home device communicate with each other without relaying the communication signal through the base station.

[0038] The network device in the embodiment of the present application may be a device for communicating with a terminal device, and the network device may also be referred to as an access network device or a wireless access network device, such as a base station. The network device in the embodiment of the present application may refer to a wireless access network (RAN) node (or device) that connects a terminal device to a wireless network. Base station can broadly cover various names as follows, or replace with the following names, such as: NodeB, evolved NodeB (eNB), next generation NodeB (gNB), relay station, access point, transmission point (TRP), transmission point (TP), master station MeNB, auxiliary station SeNB, multi-standard radio (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, base band unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. The base station can be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof. The base station can also refer to a communication module, a modem or a chip used to be arranged in the aforementioned device or apparatus. The base station can also be a mobile switching center and a device that performs base station functions in device-to-device D2D, vehicle-to-everything (V2X), machine-to-machine (M2M) communications, a network-side device in a 6G network, and a device that performs base station functions in future communication systems. The base station can support networks with the same or different access technologies. The embodiments of the present application do not limit the specific technology and specific device form used by the network equipment.

[0039] Base stations can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move based on the location of the mobile base station. In other examples, a helicopter or drone can be configured to act as a device that communicates with another base station.

[0040] In some deployments, the network device in the embodiments of the present application may refer to a CU or a DU, or the network device includes a CU and a DU. The gNB may also include an AAU.

[0041] The network equipment and terminal equipment can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on the water surface; they can also be deployed on aircraft, balloons and satellites in the air. The embodiments of the present application do not limit the scenarios in which the network equipment and terminal equipment are located.

[0042] It should be understood that all or part of the functions of the communication device in the present application may also be implemented by software functions running on hardware, or by virtualization functions instantiated on a platform (eg, a cloud platform).

[0043] Wireless link monitoring

[0044] In cellular wireless networks, as users move, the communication quality of wireless links may change at any time. If the wireless channel temporarily deteriorates due to fast fading, the data can be correctly transmitted through hybrid automatic repeat-request (HARQ) and radio link control (RLC) retransmission. If the wireless channel changes from line-of-sight (LOS) to non-line of sight (NLOS), or other reasons are lower than a certain threshold, and the duration reaches a certain length of time, it may not be possible to achieve the purpose of correct transmission through retransmission. In order to detect the deterioration of the wireless link in a timely manner, the 3rd generation partnership project (3GPP) introduced wireless link monitoring.

[0045] The basic process of wireless link monitoring can be found in Figure 2, the bottom layer of the terminal device (for example, the physical layer of the terminal device) continuously measures the downlink reference signal, such as the synchronization signal block / physical broadcast channel block (SS / PBCH block, SSB) or the channel state information reference signal (CSI-RS), to obtain the signal to interference plus noise ratio (SINR), and then determines the SINR of the current wireless channel based on its own receiver performance. Under this premise, if the terminal device (for example, UE) receives the downlink data, the block error rate (BLER) of the wireless link can be achieved, and reports the in sync (IS) indication (or out of sync (IS) indication) to the upper layer of the terminal device (for example, the radio resource control (RRC) layer of the terminal device) according to the BLER. sync, OOS) indication. The specific reporting process is: if the BLER is lower than the threshold Qin, the IS indication is reported, and Qin is the level at which the downlink wireless link quality can be reliably received; if the BLER is higher than the threshold Qout, the OOS indication is reported, and Qout is the level at which the downlink wireless link cannot be reliably received. If the terminal device high layer receives consecutive OOS indications reaching N310, the timer T310 is started. During the operation of timer T310, if the terminal device high layer receives consecutive IS indications reaching N311, it is considered that the wireless link has recovered to normal. If the wireless link is still not recovered when timer T310 times out, the terminal device high layer considers it RLF.

[0046] In the baseline version of R15, if the terminal device believes that RLF has occurred, it will initiate RRC re-establishment, select a cell, and send an RRC re-establishment request message, namely RRCReestablishmentRequest, which carries the reason for RRC re-establishment. The specific values ​​include three types: reconfiguration failure, handover failure, and other failures. Figure 3 shown.

[0047] In order to reduce the probability of RLF, 3GPP introduced timer TTT and timer T312. For the specific process, see Figure 4. When the number of OOS indications reported by the bottom layer of the terminal device to the upper layer of the terminal device reaches N310, the terminal device starts timer T310, and performs layer 3 measurement according to the configuration of the network device (for example, base station). If the measurement reporting conditions configured by the network device are met, the terminal device starts timer TTT. If during the operation of timer TTT, the result of layer 3 measurement always meets the measurement reporting conditions, then when timer TTT times out, the measurement report is reported to the network device, and timer T312 is started at the same time. During the operation of timer T312, the terminal device expects the network device to take some measures to restore the radio link, such as increasing the downlink signal power. If timer T312 times out and the radio link is still not restored (that is, no consecutive N311 IS indications are detected), the terminal device initiates RRC re-establishment. The above-mentioned timer TTT and timer T312 mechanisms are optional. If the network device is configured, the terminal device will start according to the timer TTT. Figure 4 The process in the process runs timer TTT and timer T312. If timer T312 times out (usually occurs before timer T310 times out), an RRC re-establishment request is initiated; if the network device is not configured with timer TTT and timer T312 mechanism, or is configured but timer TTT is not turned on, or timer T310 times out during the operation of timer T312, the terminal device triggers an RRC re-establishment request when it finds that timer T310 has timed out.

[0048] After the introduction of dual connectivity (DC), the terminal device can maintain connection with the cells of two network devices at the same time, that is, MCG and SCG exist at the same time. Therefore, the terminal device monitors the wireless link of MCG and SCG at the same time, and the monitoring results of both sides are independent. The terminal device determines whether RLF occurs based on the monitoring results. In the initial protocol version, it is assumed that the wireless connection of MCG is more reliable than the wireless reliable connection of SCG, so the designed RLF processing flow is (see Figure 5 ): If the terminal device detects that RLF has occurred in the SCG, it will report this situation to the MCG through the SCGFailureInformation message. The RLF detection process on the SCG can use the aforementioned timer TTT and timer T312 (if the network device is configured). The SCGFailureInformation message carries the reason for the SCG failure. The specific values ​​include three types: T30 timeout, T321 timeout, and others. If RLF is detected in the MCG, the RRC re-establishment process is initiated.

[0049] Since NR uses fewer low-frequency bands and more high-frequency bands, the premise that "MCG wireless connections are more reliable than SCG wireless reliable connections" is not necessarily true in actual 5G application scenarios. In view of this, 3GPP introduced the MCG fast recovery process in Rel-16 version, see Figure 6 As shown in . If the terminal device detects RLF in MCG and SCG can still transmit normally, it reports the MCGFailureInformation message to SCG, which carries the reason for MCG failure. The specific values ​​include three types: T310 timeout, T312 timeout, and others. At the same time, timer T316 is started. While timer T316 is running, the terminal device waits for the network device side to take measures, update parameters, and try to restore the wireless link of MCG. If timer T316 times out and no recovery operation is received from the network device side, the terminal device initiates the wireless link re-establishment process, that is, sends an RRC re-establishment request to MCG.

[0050] With the development of communication technology, model prediction technology has been widely used in the field of wireless communications, but how to predict RLF based on the model in the traditional wireless link monitoring process is an urgent problem to be solved.

[0051] Taking the artificial intelligence (AI) model as an example, see Figure 3 The RLF detection process of the terminal device is that the terminal device initiates the RRC re-establishment process only after the RLF occurs, which may cause data transmission interruption. With the continuous advancement of AI technology, it is inevitable to use AI models to predict RLF. Before RLF occurs, some preparations can be made in advance based on the prediction results obtained based on the AI ​​model to prevent RLF from interrupting data transmission. 3GPP has decided to give priority to using AI models in the scenario of timer T310 timeout in the R19 version, but it does not specify how to combine predictions based on AI models with traditional wireless link monitoring.

[0052] In order to solve the above problem, an embodiment of the present application provides a method for wireless communication, during the operation of a first timer triggered by a physical fault detected by a terminal device, the terminal device sends a first information to a network device, and the first information is used to indicate a prediction result of the occurrence of RLF in a wireless link between the terminal device and the network device determined based on a model. Based on the first information, it helps the network device to improve the quality of the wireless link before the RLF occurs to avoid the interruption of data transmission caused by the RLF.

[0053] Combined with the following Figure 7 A wireless communication method according to an embodiment of the present application is introduced. Figure 7 It is a schematic flowchart of the wireless communication method of an embodiment of the present application. Figure 7The method shown includes step S710.

[0054] In step S710, during the operation of the first timer, the terminal device sends the first information to the network device. Correspondingly, during the operation of the first timer, the network device receives the first information sent by the terminal device.

[0055] In some implementations, the first timer is triggered based on a physical fault detected by the terminal device, that is, the terminal device detects a physical layer fault and starts the first timer.

[0056] In some implementations, the physical layer failure detected by the terminal device can be understood as the terminal device determining that a physical layer failure is detected when the terminal device upper layer receives N310 consecutive OOS indications reported by the terminal device lower layer. Figure 2 The first timer is timer T310. The high layer of the terminal device receives N310 consecutive OOS indications reported by the low layer of the terminal device. The terminal device determines that a physical layer failure is detected and starts timer T310.

[0057] In some implementations, the physical layer failure includes a physical layer failure detected during communication between the terminal device and the serving cell.

[0058] In some implementations, a physical layer fault detected during communication between a terminal device and a serving cell may be understood as follows: during communication between the terminal device and the serving cell, a high layer of the terminal device receives N310 consecutive OOS indications reported by a low layer of the terminal device, and the terminal device determines that a physical layer fault is detected.

[0059] In some implementations, if the physical layer failure includes a physical layer failure detected during communication between the terminal device and the serving cell, the network device receiving the first information belongs to a network device to which the serving cell belongs. For example, the network device receiving the first information is an access network device to which the serving cell belongs.

[0060] In some implementations, the physical layer failure includes a physical layer failure detected during communication between the terminal device and the SCG.

[0061] In some implementations, a physical layer failure detected during communication between a terminal device and an SCG may be understood as a situation where, during communication between the terminal device and the SCG, a high layer of the terminal device receives N310 consecutive OOS indications reported by a low layer of the terminal device, and the terminal device determines that a physical layer failure has been detected.

[0062] In some implementations, if the physical layer failure includes a physical layer failure detected during communication between the terminal device and the SCG, the network device receiving the first information belongs to the MCG. For example, the network device receiving the first information is an access network device belonging to the MCG.

[0063] In some implementations, the physical layer failure includes a physical layer failure detected during communication between the terminal device and the MCG.

[0064] In some implementations, a physical layer failure detected during communication between a terminal device and an MCG can be understood as, during communication between the terminal device and the MCG, a high layer of the terminal device receives N310 consecutive OOS indications reported by a low layer of the terminal device, and the terminal device determines that a physical layer failure is detected.

[0065] In some implementations, if the physical layer failure includes a physical layer failure detected during communication between the terminal device and the MCG, the network device receiving the first information belongs to the SCG. For example, the network device receiving the first information is an access network device belonging to the SCG.

[0066] In some implementations, the first timer is timer N310. For example, the terminal device bottom layer detects that the BLER of the radio link between the terminal device and the serving cell is higher than the threshold Qout, and reports an OOS indication to the terminal device upper layer. When the number of consecutive OOS indications received by the terminal device upper layer reaches N310, the terminal device determines that a physical layer failure is detected, and starts timer T310. During the operation of timer T310, the terminal device can send the first information to the network device to which the serving cell belongs.

[0067] The following describes the related scheme of the first information in conjunction with Example 1.

[0068] Example 1: First Information

[0069] In some implementations, the first information is used to indicate a prediction result of RLF occurring in a wireless link between a terminal device and a network device determined based on a model.

[0070] In some implementations, the prediction result of the occurrence of RLF in the wireless link between the terminal device and the network device determined based on the model can be understood as the result obtained by using the model to predict the occurrence of RLF in the wireless link between the terminal device and the network device.

[0071] In the embodiment of the present application, the type of the above-mentioned model is not limited. In some implementations, the above-mentioned model may be an AI model. For example, the above-mentioned model may be a convolutional neural network (CNN), a recurrent neural network (RNN), a graph neural network (GNN), and a ransformer, etc. Of course, in the embodiment of the present application, the above-mentioned model may also be a model of a custom type.

[0072] In the embodiment of the present application, the method for determining the prediction result based on the model is also not limited. For example, the terminal device uses physical layer parameters (such as received signal strength indicator (RSSI), SINR and link quality indicator (LQI)) and packet reception rate (PRR) as model input, and predicts through Bayesian classifier, logistic regression and CNN to obtain the prediction result.

[0073] In some implementations, the above prediction results can be used to indicate one or more of the following: the probability of RLF occurring in the wireless link between the terminal device and the network device; and whether RLF will occur in the wireless link between the terminal device and the network device.

[0074] In some implementations, the probability of RLF occurring in a wireless link between a terminal device and a network device may also be referred to as “a specific prediction determined based on a model.”

[0075] In some implementations, the probability of RLF occurring in the wireless link between the terminal device and the network device may be understood as the probability of RLF occurring in the wireless link between the terminal device and the network device in the future.

[0076] In some implementations, the probability of RLF occurring in the radio link between the terminal device and the network device can be understood as a statistical value of the probability of RLF occurring in the radio link between the terminal device and the network device, for example, the highest probability, the lowest probability, the average probability, etc.

[0077] In some implementations, the probability of RLF occurring in the wireless link between the terminal device and the network device can be understood as the probability of RLF occurring in the wireless link between the terminal device and the network device in the first time period, or the probability of RLF occurring in the wireless link between the terminal device and the network device in the first time period in the future.

[0078] In some implementations, the first time period is used to indicate a future time period, or in other words, the first time period is used to indicate a future time window. For example, the first time period is used to indicate a future time window with a duration of 10 minutes.

[0079] In some implementations, the first time period is configured using [start time, end time]. For example, the start time is T1, the end time is T2, and the first time period is [T1, T2].

[0080] In some implementations, the start time and the end time may be equal, and the length of the first time period is 0, corresponding to a time point. For example, the start time is T1, and the end time is also T1, and the first time period is used to indicate the time point of "current time + T1".

[0081] In some implementations, the start time and the end time may be different. For example, the first time period is [T1, T2], T1 and T2 have different values, the start time of the first time period is "current time + T1", the end time of the first time period is "current time + T2", and the first time period indicates the time period starting from "current time + T1" to "current time + T2".

[0082] In some implementations, the value of the start time may be 0, and the first time period is used to indicate the time period starting from the current time and ending at the end time. For example, the first time period is [T1, T2], T1 is 0, and the first time period indicates the time period starting from the current time and ending at T2.

[0083] In some implementations, the first time period may be predefined. For example, the protocol specifies that the first time period is [0, 10], which indicates a time period starting from the current moment and ending 10 minutes later.

[0084] In some other implementations, the first time period is configured by the network device. For example, the network device configures [T1, T2] as the first time period through an RRC message.

[0085] In some implementations, the probability of RLF occurring in the wireless link between the terminal device and the network device in the first time period can be understood as the probability of RLF occurring in the wireless link between the terminal device and the network device at multiple times in the first time period. For example, the first time period is [T1, T2], T1' and T2' are in the first time period, and the prediction result indicates the probability P1 of RLF occurring in the wireless link between the terminal device and the network device at time T1' and the probability P2 of RLF occurring at time T2'.

[0086] In some implementations, the probability of RLF occurring in the wireless link between the terminal device and the network device in the first time period can be understood as a statistical value of the probability of RLF occurring in the wireless link between the terminal device and the network device in the first time period. For example, the first time period is [T1, T2], and the prediction result can indicate one or more of the following statistical values ​​of the probability of RLF occurring in the wireless link between the terminal device and the network device in the [T1, T2] time period: the highest probability, the lowest probability, and the average probability.

[0087] In some implementations, whether the wireless link between the terminal device and the network device will experience RLF can be understood as whether the wireless link between the terminal device and the network device will experience RLF in the future.

[0088] In some implementations, whether RLF occurs in the wireless link between the terminal device and the network device can be understood as whether RLF occurs in the wireless link between the terminal device and the network device within a first time period.

[0089] In some implementations, the prediction result indicates whether RLF will occur in the wireless link between the terminal device and the network device. It can be understood that the prediction result indicates that RLF will occur in the wireless link between the terminal device and the network device.

[0090] In some implementations, the prediction result indicates whether RLF will occur in the wireless link between the terminal device and the network device. It can be understood that the prediction result indicates that RLF will not occur in the wireless link between the terminal device and the network device.

[0091] In some implementations, the prediction result indicates whether the radio link between the terminal device and the network device will have RLF, which can be understood as the prediction result indicating that the radio link between the terminal device and the network device will have RLF within the first time period. For example, the first time period is [T1, T2], and the prediction result indicates that the radio link between the terminal device and the network device will have RLF within the [T1, T2] time period.

[0092] In some implementations, the prediction result indicates whether the radio link between the terminal device and the network device will have RLF, which can be understood as indicating that the prediction result indicates that the radio link between the terminal device and the network device will not have RLF in the first time period. For example, the first time period is [T1, T2], and the prediction result indicates that the radio link between the terminal device and the network device will not have RLF in the [T1, T2] time period.

[0093] In some implementations, if the prediction result indicates whether RLF occurs in the wireless link between the terminal device and the network device, the first information sent by the terminal device to the network device is carried in an enumerated variable. For example, the value of the enumerated variable includes a first constant and a second constant. When the value of the enumerated variable is the first constant, it indicates that RLF will occur in the wireless link between the terminal device and the network device. When the value of the enumerated variable is the second constant, it indicates that RLF will not occur in the wireless link between the terminal device and the network device, wherein the first constant is different from the second constant.

[0094] In the embodiments of the present application, the method for determining whether RLF will occur in the wireless link between the terminal device and the network device is not limited. In some implementations, if the probability of RLF occurring in the wireless link predicted based on the model is greater than the threshold configured by the network device, the prediction result may indicate that RLF will occur in the wireless link between the terminal device and the network device. In some implementations, if the minimum probability of RLF occurring in the wireless link predicted based on the model in the first time period is greater than the threshold configured by the network device, the prediction result may indicate that RLF will occur in the wireless link between the terminal device and the network device in the first time period. In other implementations, if the minimum probability of RLF occurring in the wireless link predicted based on the model in the first time period is lower than the threshold configured by the network device, the prediction result may indicate that RLF will not occur in the wireless link between the terminal device and the network device in the first time period.

[0095] In some implementations, when the first condition is met, the terminal device sends the first information to the network device. That is, if the first condition is met, the terminal device sends the first information to the network device.

[0096] In some implementations, the first condition includes one or more of the following: the average value of the probability of RLF occurring in the wireless link predicted based on the model in the first time period is higher than the average value of the probability threshold of RLF occurring in the wireless link determined based on the first function configured based on the network device in the first time period; the first probability of RLF occurring in the wireless link predicted based on the model in the first time period is higher than the probability threshold of RLF occurring in the wireless link determined based on the first function in the first time period; the proportion of the first time duration in the total duration of the first time period is higher than a threshold value, and the first time is the time period corresponding to the probability of RLF occurring in the wireless link predicted based on the model in the first time period being higher than the probability threshold of RLF occurring in the wireless link determined based on the first function.

[0097] In some implementations, the first function configured by the network device may be configured by the network device through an RRC message. Of course, in the embodiment of the present application, the first function configured by the network device may also be configured by the network device through other messages.

[0098] In some implementations, the first function is used to determine the probability threshold of RLF occurring in the wireless link within the first time period. It can be understood that the first function is the probability threshold of RLF occurring in the wireless link at a future time configured by the network device, and the future time includes the first time period. For example, after the network device is configured, the probability of RLF occurring in the wireless link between the terminal device and the network device will gradually increase with the passage of time. The network device configures the probability threshold of RLF occurring in the wireless link at a future time and uses the first function to represent it. The future time includes the first time period. Based on the first function, the terminal device can determine the probability threshold of RLF occurring in the wireless link within the first time period configured by the network device. For another example, the first function is P=f(win), see Figure 8 In the curve represented by the implementation, the parameter win is time, the vertical axis P is the probability threshold of RLF occurring in the wireless link at the moment win, the first time period is the time period [T1, T2] on the horizontal axis win, and the probability threshold of RLF occurring in the wireless link within the first time period configured by the network device can be determined based on the first function.

[0099] In some implementations, the first condition includes that the average value of the probability of RLF occurring in the wireless link predicted based on the model in the first time period is higher than the average value of the probability threshold of RLF occurring in the wireless link determined based on the first function configured by the network device in the first time period. It can be understood that if the average value of the probability of RLF occurring in the wireless link predicted based on the model in the first time period is higher than the average value of the probability threshold of RLF occurring in the wireless link determined based on the first function configured by the network device in the first time period, then the first condition is met. For example, the network device configures the first function and the first time period through an RRC message, the first time period is [T1, T2], and the first function is P = f(win), see Figure 8 The solid line in the figure represents the curve. The probability threshold of RLF in the wireless link determined based on the first function is: Figure 8 The vertical coordinate of the curve represented by the solid line is the probability of RLF occurring in the wireless link predicted by the terminal device based on the model. Figure 8 The dotted line represents the ordinate of the curve. If, in the time period [T1, T2], the average value of the ordinate of the curve represented by the dotted line is higher than the average value of the ordinate of the curve represented by the solid line, the first condition is met and the terminal device can send the first information to the network device.

[0100] In some implementations, the first condition includes a first probability of RLF occurring in a wireless link predicted based on a model within a first time period, which is higher than a probability threshold of RLF occurring in a wireless link determined based on a first function within the first time period. It can be understood that if at least one first probability of RLF occurring in a wireless link predicted based on a model within the first time period is higher than a probability threshold of RLF occurring in a wireless link determined based on a first function within the first time period, the first condition is satisfied. For example, the network device configures the first function and the first time period through an RRC message, the first time period is [T1, T2], the first function is P=f(win), see Figure 8 The solid line in the figure represents the curve. The probability threshold of RLF in the wireless link determined based on the first function is: Figure 8 The vertical coordinate of the curve represented by the solid line is the probability of RLF occurring in the wireless link predicted by the terminal device based on the model. Figure 8 The vertical coordinate of the curve represented by the dotted line in the figure is higher than the vertical coordinate of the curve represented by the solid line at at least one point in the time period [T1, T2]. Then the first condition is met and the terminal device can send the first information to the network device.

[0101] In some implementations, the first condition includes that the proportion of the duration of the first time in the total duration of the first time period is higher than a threshold, and the first time is a time period corresponding to the probability of RLF of the wireless link predicted based on the model in the first time period is higher than the probability threshold of RLF of the wireless link determined based on the first function. It can be understood that if the proportion of the duration of the first time in the total duration of the first time period is higher than the threshold, the first condition is met. For example, the network device configures the first function and the first time period through an RRC message, the first time period is [T1, T2], the first function is P = f(win), see Figure 8 The solid line in the figure represents the curve. The probability threshold of RLF in the wireless link determined based on the first function is: Figure 8 The vertical coordinate of the curve represented by the solid line is the probability of RLF occurring in the wireless link predicted by the terminal device based on the model. Figure 8 The vertical coordinate of the curve represented by the dotted line in the [T1, T2] time period, the time period in which the vertical coordinate of the curve represented by the dotted line is higher than the vertical coordinate of the curve represented by the solid line is [T1', T2], that is, the first time, the duration of the first time is T2-T1', the total duration of the first time period is T2-T1, if the proportion of T2-T1' in T2-T1 is higher than the threshold, the first condition is met, and the terminal device sends the first information to the network device.

[0102] In some implementations, the threshold may be predefined, for example, the protocol specifies that the threshold is 70%.

[0103] In some other implementations, the threshold may be preconfigured. For example, the network device configures the threshold to be 70% through an RRC message.

[0104] In the embodiment of the present application, the first condition can be used to determine the prediction result in the above text. In some implementations, if the first condition is met, the prediction result in the above text can indicate that RLF will occur in the wireless link between the terminal device and the network device; if the first condition is not met, the prediction result in the above text can indicate that RLF will not occur in the wireless link between the terminal device and the network device.

[0105] In some implementations, in response to the fourth timer timing out and the prediction result determined based on the model during the operation of the fourth timer meeting the first condition, the terminal device sends the first information to the network device.

[0106] In some implementations, the start of the fourth timer is triggered based on the first condition, that is, the terminal device starts the fourth timer if the first condition is met, or if the first condition is met, the terminal device starts the fourth timer. For example, the fourth timer is T_rlf, and if the terminal device determines that the first condition is met, the terminal device starts the timer T_rlf.

[0107] In some implementations, in response to the fourth timer timing out, and the prediction result determined based on the model during the operation of the fourth timer satisfies the first condition, the terminal device sends the first information to the network device. It can be understood that during the operation of the fourth timer, if the prediction result determined based on the model satisfies the first condition, then after the fourth timer times out, the terminal device sends the first information to the network device. For example, the fourth timer is T_rlf, if the terminal device determines that the first condition is met, the terminal device starts the timer T_rlf, and during the operation of the timer T_rlf, the terminal device continues to determine the prediction result based on the model, and if during this period the terminal device determines that the first condition is met, the terminal device sends the first information to the network device after the timer T_rlf times out.

[0108] In some implementations, the first information is carried in an RRC reestablishment request. For example, an RRCReestablishmentRequest message carries the first information, and the terminal device reports the first information by sending an RRCReestablishmentRequest message to the network device. Using an existing message to carry the first information helps reduce overhead.

[0109] In some implementations, if the first information is carried in an RRC re-establishment request, the RRC re-establishment request may indicate that the reason for the RRC re-establishment is the model-predicted RLF. Fig. 9The first timer is timer T310. During the operation of timer T310, the terminal device determines the prediction result based on the model. If the first condition is met, the terminal device sends an RRC re-establishment request to the network device. The RRC re-establishment carries the first information and indicates that the reason for the RRC re-establishment is the model-predicted RLF.

[0110] In some other implementations, the first information is carried in a newly defined message. Fig.10 The newly defined message is RLF predication information, the first timer is timer T310, during the operation of timer T310, the terminal device determines the prediction result based on the model, if the first condition is met, the terminal device sends the RLF predication information to the network device, the RLF predication information carries the first information, and the terminal device reports the first information by sending the RLF predication information to the network device. Using the newly defined message to carry the first message helps to improve the flexibility of transmitting the first information.

[0111] In some implementations, the newly defined message may be an RRC message or a medium access control control element (MAC CE).

[0112] Embodiment 2: First configuration information

[0113] In some implementations, before the terminal device sends the first information to the network device, the network device sends the first configuration information to the terminal device, and the first configuration information is used to configure the terminal device to determine the prediction result of the occurrence of RLF in the radio link based on the model, that is, the first configuration information is used to configure the terminal device to determine the first information. Accordingly, the terminal device receives the first configuration information sent by the network device, and can determine whether to report the first information based on the first configuration information and the model. If it is determined to report the first information, the first information is determined, generated, and reported to the network device.

[0114] In some implementations, the first configuration information is used to configure the terminal device to determine the prediction result of the occurrence of RLF in the radio link based on the model, which can be understood as the first configuration information is used to configure the parameters required for the terminal device to predict the occurrence of RLF in the radio link based on the model. For example, the first configuration information can configure the first function and / or the first time period mentioned above.

[0115] In some implementations, the first configuration information may be used to indicate whether the terminal device reports a prediction result determined based on a model, or in other words, the first configuration information may be used to indicate whether the terminal device reports the first information.

[0116] In some implementations, the first configuration information explicitly indicates whether the terminal device reports the prediction result determined based on the model. For example, the first configuration information is carried in a Boolean variable, which indicates whether the terminal device reports the prediction result determined based on the model. If the value of the Boolean variable is a first value, it indicates that the terminal device reports the prediction result based on the model. If the value of the Boolean variable is a second value, it indicates that the terminal device does not report the prediction result based on the model. The first value is different from the second value. For example, the first value can be true, and the second value can be false. For another example, the first value can be false, and the second value can be true.

[0117] In some other implementations, the first configuration information implicitly indicates whether the terminal device reports the first information. For example, the first configuration information is used by the terminal device to determine whether the first condition above is met. For another example, the first configuration information is used by the terminal device to determine the first information.

[0118] In some implementations, the first configuration information is used to configure a first function. For example, the first function is P=f(win), indicating that the probability threshold of RLF of the wireless link between the terminal device and the network device at the future win time is P, and the first configuration information includes the first function.

[0119] In some implementations, if the first configuration information is used to configure the first function, the first configuration information can be used by the terminal device to determine the first information and / or determine whether the first condition is met. Accordingly, the terminal device receives the first configuration information and can determine the first function based on the first configuration information, thereby determining the first information and / or determining whether the first condition is met. For example, the prediction result indicates whether the radio link between the terminal device and the network device will have RLF in the first time period. The terminal device receives the first configuration information and can determine the first function based on the first configuration information. If the average value of the probability of RLF occurring in the radio link predicted based on the model in the first time period is higher than the average value of the probability threshold of RLF occurring in the radio link determined based on the first function configured by the network device in the first time period, the terminal device can determine the first information, and the first information indicates that RLF will occur in the radio link between the terminal device and the network device in the first time period. For another example, the first function is P=f(win), indicating that the probability threshold of RLF occurring in the radio link between the terminal device and the network device at the future win moment is P, and the value of the variable win of the first function includes the first time period. The first condition includes that the average value of the probability of RLF occurring in the wireless link predicted based on the model in the first time period is higher than the average value of the probability threshold of RLF occurring in the wireless link determined based on the first function configured by the network device in the first time period. The terminal device can determine the first function based on the received first configuration information, and then determine whether the first condition is met. If the first condition is met, the terminal device reports the first information.

[0120] In some implementations, the first configuration information is used to configure the first time period mentioned above. For example, the first time period is [T1, T2], and the first configuration information includes the first time period.

[0121] In some implementations, if the first configuration information is used to configure the first time period mentioned above, the first configuration information can be used by the terminal device to determine the first information and / or determine whether the first condition is met. Accordingly, the terminal device receives the first configuration information and can determine the first time period based on the first configuration information, and then determine the first information and / or determine whether the first condition is met. For example, the prediction result indicates the probability of RLF occurring in the radio link between the terminal device and the network device in the first time period. The terminal device receives the first configuration information and can determine the first time period based on the first configuration information, and then determine the first information. For another example, the first condition includes the average value of the probability of RLF occurring in the radio link predicted based on the model in the first time period, which is higher than the average value of the probability threshold of RLF occurring in the radio link determined based on the first function configured by the network device in the first time period. The terminal device can determine the first time period based on the received first configuration information, and then determine whether the first condition is met based on the known first function (for example, configured by other messages of the network device, or configured by the first configuration information received last time). If the first condition is met, the terminal device reports the first information.

[0122] In some implementations, the first configuration information is used to configure a first probability threshold. For example, the first probability threshold is P_thresh, and the first configuration information includes the first probability threshold.

[0123] In some implementations, if the first configuration information is used to configure a first probability threshold, the first configuration information can be used by the terminal device to determine the first information and / or determine whether the first condition is met. Accordingly, when the terminal device receives the first configuration information, it can determine the first probability threshold based on the first configuration information, and then determine the first information and / or determine whether the first condition is met. For example, the first probability threshold is P_thresh, and the first condition includes that the probability of RLF occurring in the wireless link determined by the terminal device based on the model is greater than P_thresh, and the prediction result indicates whether RLF will occur in the wireless link between the terminal device and the network device. The terminal device determines the first probability threshold based on the received first configuration information, and determines whether the first condition is met. If the first condition is met, the terminal device sends the first information, and the first information indicates that RLF will occur in the wireless link between the terminal device and the network device.

[0124] In some implementations, the first configuration information is used to configure the first time period and the first probability threshold. For example, the prediction result above indicates whether the wireless link between the terminal device and the network device will experience RLF within the first time period, and the first probability threshold is P_thresh. If the probability of RLF occurring in the wireless link determined by the terminal device based on the model within the first time period is greater than P_thresh, then the first information may indicate that RLF will occur in the wireless link between the terminal device and the network device within the first time period. For another example, the first probability threshold is P_thresh, and the first condition includes that the probability of RLF occurring in the wireless link determined by the terminal device based on the model within the first time period is greater than P_thresh. The terminal device determines the first time and the first probability threshold based on the received first configuration information, and determines whether the first condition is met. If the first condition is met, the terminal device sends the first information.

[0125] In some implementations, the first configuration information is carried in an RRC message.

[0126] In some implementations, the RRC message may be an existing RRC message. For example, an existing RRC reconfiguration message carries the first configuration information.

[0127] In some other implementations, the RRC message may be a newly defined RRC message. For example, a new AI associated information message is added to carry the first configuration information.

[0128] In some implementations, the first configuration message does not need to be activated, that is, when the terminal device receives the first configuration information, the first configuration information takes effect immediately.

[0129] In some other implementations, the first configuration message needs to be activated, that is, after the terminal device receives the first configuration information, the first configuration information is not effective, and the first configuration information becomes effective only after the terminal device receives activation information corresponding to the first configuration information.

[0130] In some implementations, the activation information corresponding to the first configuration information is carried in MAC CE or downlink control information (DCI).

[0131] In some implementations, the first configuration information is sent by the network device after completing configuration. For example, when the terminal device accesses the cell and completes the RRC session establishment, the network device completes the configuration and sends the first configuration information to the terminal device so that the terminal device can predict the RLF based on the model.

[0132] In some implementations, the first configuration information may also be used to configure one or more of the following: whether the terminal device clears the intermediate prediction results determined based on the model; whether the terminal device starts a new round of model-based RLF prediction.

[0133] In some implementations, the first configuration information is used to configure whether the terminal device clears the intermediate prediction result determined based on the model, which can be understood as the first configuration information being used to configure whether the terminal device clears the intermediate prediction result determined based on the model last time. For example, the terminal device receives the first configuration information sent by the network device, or the updated first configuration information sent, or the activation information corresponding to the first configuration information sent. After the first configuration information takes effect, the terminal device can determine whether to clear the intermediate prediction result determined based on the model last time based on the first configuration information.

[0134] In some implementations, the first configuration information is used to configure whether the terminal device clears the intermediate prediction results determined based on the model, and whether the terminal device starts a new round of model-based RLF prediction. It can be understood that the first configuration information is used to configure the terminal device to clear the original intermediate prediction results determined based on the model, and start a new round of model-based RLF prediction. For example, the terminal device receives the first configuration information sent by the network device, or the updated first configuration information sent, or the activation information corresponding to the first configuration information sent. After the first configuration information takes effect, the terminal device determines to clear the original intermediate prediction results determined based on the model based on the first configuration information, and starts a new round of model-based RLF prediction from the beginning.

[0135] In some implementations, in response to the first timer expiring, if the first information is carried in a newly defined message, the terminal device sends an RRC re-establishment request to the network device. Fig.10 The first timer is timer T310, the first information is carried in the newly defined RLF warning information, and when timer T310 times out, the terminal device sends an RRC re-establishment request to the network device.

[0136] In some implementations, in response to the first timer expiring, if the terminal device has determined a prediction result based on the model but has not sent the first information to the network device, the terminal device may send an RRC re-establishment request to the network device.

[0137] In some implementations, the RRC re-establishment request sent after the first timer expires may indicate that the RLF was once predicted based on the model and / or the prediction result was once determined based on the model.

[0138] In some implementations, the RLF has been predicted based on the model, which can be understood as the prediction result determined based on the model that the RLF will occur in the wireless link between the terminal device and the network device.

[0139] In some implementations, the prediction result once determined based on the model can be understood as a specific prediction situation once determined based on the model, or in other words, the prediction result once determined based on the model is the probability that the wireless link between the terminal device and the network device will have RLF. For example, the prediction result once determined based on the model is the highest probability, the lowest probability, the average probability, etc. of the occurrence of RLF in the wireless link between the terminal device and the network device in the [T1, T2] time period.

[0140] In some implementations, the RRC re-establishment request sent after the first timer expires may indicate that the reason for the RRC re-establishment is model-predicted RLF. Fig.10 The first timer is timer T310. When timer T310 times out, the terminal device sends an RRC re-establishment request to the network. The RRC re-establishment request indicates that the reason for RRC re-establishment is model-predicted RLF.

[0141] The above describes the related schemes of the first information and the first configuration information respectively through Example 1 and Example 2. Fig. 9 and Fig.10 A combination scheme of the first information and the first configuration information is introduced. Fig. 9 Take the example of the first information being carried in the RRC re-establishment request for introduction. Fig.10 The first information is carried in the newly defined RLF warning information as an example for introduction.

[0142] See also Fig. 9 , assuming that the first timer is timer T310, the first configuration information is used to configure the first time period and the first function, and the first condition includes that the average value of the probability of RLF occurring in the wireless link predicted based on the model in the first time period is higher than the average value of the probability threshold of RLF occurring in the wireless link determined based on the first function configured by the network device in the first time period. After the terminal device completes the establishment of the RRC session, the network device sends the first configuration information to the terminal device. During the operation of timer T310, the terminal device predicts the probability of RLF occurring in the wireless link based on the model. If the average value of the probability in the first time period is greater than the average value of the probability threshold of RLF occurring in the wireless link determined based on the first function in the first time period, the terminal device determines that the first condition is met, that is, sends an RRC re-establishment request to the network device, and the RRC re-establishment request carries the first information and indicates that the reason for the RRC re-establishment is the model-predicted RLF. Among them, the first information indicates the average probability of RLF occurring in the wireless link between the terminal device and the network device in the first time period.

[0143] See also Fig.10, assuming that the first timer is timer T310, the first configuration information is used to configure the first time period and the first function, and the first condition includes that the duration of the first time accounts for a proportion of more than 80% in the total duration of the first time period. After the terminal device completes the establishment of the RRC session, the network device sends the first configuration information to the terminal device. During the operation of timer T310, the terminal device predicts the probability of RLF occurring in the wireless link based on the model. If the probability of RLF occurring in the wireless link predicted based on the model in the first time period is higher than the duration of the time period (i.e., the first time) corresponding to the probability threshold of RLF occurring in the wireless link determined based on the first function, and the proportion of the total duration of the first time period is higher than 80%, the terminal device determines that the first condition is met, i.e., sends RLF warning information to the network device. The RLF warning information carries the first information, and the first information indicates that the wireless link between the terminal device and the network device will have RLF in the first time period. If the terminal device does not receive N311 consecutive IS indications until the timer T310 times out, the terminal device considers that RLF occurs in the wireless link. When timer T310 times out, an RRC re-establishment request is sent to the network device, and the reason for RRC re-establishment is indicated as model-predicted RLF.

[0144] Embodiment 3: Second timer

[0145] In some implementations, in response to the terminal device sending the first information, the terminal device starts the second timer. For example, the first timer is timer T310, the second timer is timer T312', and during the operation of timer T310, the terminal device sends the first information to the network device, and starts timer T312' when sending the first information.

[0146] In some implementations, during the operation of the second timer, the terminal device expects the network device to perform an operation for restoring the radio link. For example, the second timer is timer T312', and during the operation of timer T312', the terminal device expects the network device to perform an operation for improving the quality of the radio link to avoid RLF of the radio link as much as possible.

[0147] In some implementations, the operation for restoring the radio link can be understood as an operation that enables the terminal device to detect N311 consecutive IS indications. For example, the network device increases the downlink signal power so that the terminal device detects N311 consecutive IS indications, and the terminal device considers that the radio link is restored.

[0148] In some implementations, if the physical layer failure described above includes a physical layer failure detected during communication between the terminal device and the serving cell, in response to the second timer expiring, the terminal device sends an RRC re-establishment request to the network device. Fig.11The second timer is timer T312'. During the operation of timer T312', the terminal device expects the network device to perform an operation for restoring the radio link of the serving cell. If the terminal device does not receive N311 consecutive IS indications until timer T312' times out, it is considered that the radio link of the serving cell has not been restored. In response to the timer T312' timing out, the terminal device sends an RRC re-establishment request to the network device to access other cells with better radio link quality to achieve RRC session re-establishment.

[0149] In some implementations, when the second timer expires, the RRC re-establishment request sent by the terminal device may indicate that the RRC re-establishment reason is model-predicted RLF.

[0150] In some implementations, when the second timer times out, the RRC re-establishment request sent by the terminal device may carry the prediction result determined based on the model. For example, during the operation of the second timer, the terminal device continues to determine the prediction result based on the model, and carries the latest prediction result determined based on the model in the RRC re-establishment request sent when the second timer times out.

[0151] It should be noted that the prediction results determined based on the model have been explained in the previous article and will not be repeated here.

[0152] For ease of understanding, the following takes the physical layer failure indicated by the first information as an example, including the physical layer failure detected during the communication between the terminal device and the serving cell. Fig.11 An example is given to introduce a combination scheme of the first information and the second timer.

[0153] Assume that the physical layer failure indicated by the first information includes a physical layer failure detected during communication between the terminal device and the serving cell, the network device belongs to the network device of the serving cell, the first timer is timer T310, and the second timer is timer T312'.

[0154] In step S1110 , the timer T310 starts running.

[0155] When the physical fault detected by the terminal device is that the upper layer of the terminal device receives N310 consecutive OOS indications, the terminal device starts timer T310.

[0156] In step S1120, the terminal device sends first information to the network device.

[0157] During the operation of timer T310, the terminal device predicts the probability of RLF occurring in the wireless link between the terminal device and the network device based on the model. When the first condition is met, the terminal device sends the first information to the network device through the RLF warning information, and the first information indicates the probability of RLF occurring in the wireless link between the terminal device and the network device. In response to the terminal device sending the first information, the terminal device starts timer T312'. During the operation of timer T312', the terminal device expects the network device to perform an operation for improving the quality of the wireless link between the terminal device and the network device, and the terminal device continues to determine the prediction result based on the model.

[0158] In step S1130, the terminal device sends an RRC re-establishment request to the network device.

[0159] If the terminal device does not receive N311 consecutive IS indications before timer T310 times out, it is considered that the radio link of the serving cell has not been restored. In response to timer T312' timing out, the terminal device sends an RRC re-establishment request to the network device, and the RRC re-establishment request carries the latest prediction result determined based on the model.

[0160] In some implementations, if the physical layer failure includes a physical layer failure detected during communication between the terminal device and the SCG, in response to the second timer expiring, the terminal device sends SCGFailureInformation to the network device, and / or indicates that the reason for the SCG failure is the second timer expiring. Fig.12 , the second timer is timer T312'. During the operation of timer T312', the terminal device expects the network device to which the MCG belongs to perform operations for restoring the radio link of the SCG. If the terminal device does not receive N311 consecutive IS indications until timer T310 times out, it is considered that the radio link of the SCG has not been restored. In response to the timeout of timer T312', the terminal device sends a SCGFailureInformation message to the network device to which the MCG belongs, and indicates that the reason for the SCG failure is T312' timeout.

[0161] For ease of understanding, the following takes the physical layer failure indicated by the first information as an example, including the physical layer failure detected during the communication between the terminal device and the SCG. Fig.12 An example is given to introduce a combination scheme of the first information and the second timer.

[0162] Assuming that the physical layer failure indicated by the first information includes a physical layer failure detected during the communication between the terminal device and the SCG, the first timer is timer T310, and the second timer is timer T312'.

[0163] In step S1210 , the timer T310 starts running.

[0164] When the physical fault detected by the terminal device is that the upper layer of the terminal device receives N310 consecutive OOS indications, the terminal device starts timer T310.

[0165] In step S1220, the terminal device sends first information to the MCG.

[0166] During the operation of timer T310, the terminal device predicts the probability of RLF occurring in the wireless link between the terminal device and the network device to which the SCG belongs based on the model. When the first condition is met, the terminal device sends the first information to the network device to which the MCG belongs through the RLF warning information. The first information indicates the probability of RLF occurring in the wireless link between the terminal device and the network device to which the SCG belongs. In response to the terminal device sending the first information, the terminal device starts timer T312'. During the operation of timer T312', the terminal device expects the network device to which the MCG belongs to perform an operation for improving the quality of the wireless link between the terminal device and the network device to which the SCG belongs.

[0167] In step S1230, the terminal device sends SCGFailureInformation to the MCG.

[0168] If the terminal device does not receive N311 consecutive IS indications until timer T310 times out, it considers that the radio link of SCG has not been restored. In response to timer T312' timeout, the terminal device sends SCGFailureInformation to the network device to which MCG belongs, and indicates that the reason for SCG failure is T312' timeout.

[0169] In some implementations, if the physical layer failure includes a physical layer failure detected during communication between the terminal device and the MCG, in response to the second timer expiring, the terminal device sends MCGFailureInformation to the network device, and / or indicates that the reason for the MCG failure is the second timer expiring. Fig.13 , the second timer is timer T312'. During the operation of timer T312', the terminal device expects the network device to which the SCG belongs to perform operations for restoring the radio link of the MCG. If the terminal device does not receive N311 consecutive IS indications until timer T310 times out, it is considered that the radio link of the MCG has not been restored. In response to the timeout of timer T312', the terminal device sends a MCGFailureInformation message to the network device to which the SCG belongs, and indicates that the reason for the failure of the MCG is the timeout of T312'.

[0170] In some implementations, in response to the second timer expiring, the terminal device starts a third timer. Fig.13The first timer is timer T312', and the third timer is timer T316. When timer T312' times out, the terminal device starts timer T316.

[0171] In some implementations, while the third timer is running, the terminal device expects the network device to perform operations for recovering the radio link of the MCG.

[0172] In some implementations, the network device that performs the operation for restoring the wireless link of the MCG may be a network device to which the MCG belongs, for example, an access network device to which the MCG belongs.

[0173] In some other implementations, the network device that performs the operation for restoring the wireless link of the MCG may be a network device to which the SCG belongs, for example, an access network device to which the SCG belongs.

[0174] In some implementations, if the third timer times out, the radio link between the terminal device and the MCG is not restored, and the prediction result determined based on the model indicates that the radio link between the terminal device and the MCG will have RLF, the terminal device sends an RRC re-establishment request to the MCG. For example, see Fig.13 , the second timer is timer T312', and the third timer is T316. During the operation of timer T312', the terminal device expects the network device to which SCG belongs to perform operations for restoring the radio link of MCG. If the terminal device does not receive N311 consecutive IS indications until timer T312' times out, it is considered that the radio link of MCG has not been restored. In response to the timeout of timer T312', the terminal device starts timer T316. During the operation of timer T316, the terminal device expects the network device to perform operations for restoring the radio link of MCG. If the terminal device does not receive N311 consecutive IS indications until timer T316 times out, it is considered that the radio link of MCG has not been restored. In response to the timeout of timer T316, if the prediction result determined based on the model indicates that RLF will occur in the radio link between the terminal device and MCG, the terminal device sends an RRC re-establishment request to the network device to which MCG belongs, and indicates that the reason for the re-establishment is the model-predicted RLF.

[0175] In some implementations, the RRC re-establishment request carries a prediction result determined based on a model, and / or indicates that the re-establishment cause is model-predicted RLF.

[0176] It should be noted that the prediction results determined based on the model have been explained in the previous article and will not be repeated here.

[0177] For ease of understanding, the following takes the physical layer failure indicated by the first information as an example, including the physical layer failure detected during the communication between the terminal device and the MCG. Fig.13An example is given to introduce a combination of the first information, the second timer and the third timer.

[0178] Assuming that the physical layer fault indicated by the first information includes a physical layer fault detected during the communication between the terminal device and the MCG, the first timer is timer T310, the second timer is timer T312', and the third timer is timer T316.

[0179] In step S1310 , the timer T310 starts running.

[0180] When the physical fault detected by the terminal device is that the upper layer of the terminal device receives N310 consecutive OOS indications, the terminal device starts timer T310.

[0181] In step S1320, the terminal device sends first information to the SCG.

[0182] During the operation of timer T310, the terminal device predicts the probability of RLF occurring in the wireless link between the terminal device and the network device to which the MCG belongs based on the model, and sends a first message to the network device to which the SCG belongs through RLF warning information, and the first message indicates the probability of RLF occurring in the wireless link between the terminal device and the network device to which the MCG belongs. In response to the terminal device sending the first message, the terminal device starts timer T312'. During the operation of timer T312', the terminal device expects the network device to which the SCG belongs to perform an operation for restoring the wireless link between the terminal device and the network device to which the MCG belongs.

[0183] In step S1330, the terminal device reports a measurement report to the network device.

[0184] The terminal device performs layer 3 measurement according to the network device configuration. If the measurement reporting conditions configured by the network device are met, the terminal device starts the timer TTT. If the layer 3 measurement results always meet the measurement reporting conditions during the operation of the timer TTT, the measurement report is reported to the network device when the timer TTT times out, and the timer T312 is started.

[0185] In step S1340, the terminal device sends MCGFailureInformation to the SCG.

[0186] If the terminal device does not receive N311 consecutive IS indications until timer T312' times out, it is considered that the radio link of the MCG has not been restored. In response to the timer T312' timing out, the terminal device sends MCGFailureInformation to the network device to which the SCG belongs, and indicates that the reason for the MCG failure is T312' timeout. In response to the timer T312' timing out, the terminal device starts timer T316. During the operation of timer T316, the terminal device expects the network device to perform operations for restoring the radio link of the MCG.

[0187] In step S1340, the terminal device sends an RRC re-establishment request to the MCG.

[0188] If the terminal device does not receive N311 consecutive IS indications until the timer T316 times out, it is considered that the radio link of the MCG has not been restored. In response to the timer T316 timing out, the terminal device sends an RRC re-establishment request to the network device to which the MCG belongs, and indicates that the reason for the re-establishment is the model predicted RLF.

[0189] In some implementations, the second timer and the fifth timer are the same timer, and the fifth timer is triggered based on the terminal device sending a measurement report. Fig.13 , the second timer is T312', the fifth timer is timer T312, the terminal device sends the first information and starts timer T312', timer T312' is started during the operation of timer TTT, during the operation of timer T312', the terminal device expects the network device to perform operations for improving the quality of the wireless link, so there is no need to start timer T312 when TTT times out.

[0190] Combination of the above Figures 1 to 13 , describes the method embodiment of the present application in detail, and the following is combined with Figures 14 to 16 , describes the device embodiment of the present application in detail. It should be understood that the description of the method embodiment corresponds to the description of the device embodiment, so the parts not described in detail can refer to the previous method embodiment.

[0191] Fig.14 It is a schematic diagram of a terminal device according to an embodiment of the present application. Fig.14 The terminal device 1400 shown includes: a sending unit 1410.

[0192] The sending unit 1410 is used to send first information to the network device during the operation of the first timer, wherein the first information is used to indicate a prediction result of a radio link failure RLF occurring in the wireless link between the terminal device and the network device determined based on a model; wherein the first timer is triggered based on a physical layer fault detected by the terminal device.

[0193] In some implementations, the physical layer failure includes one of the following: a physical layer failure detected during communication between the terminal device and the service cell; a physical layer failure detected during communication between the terminal device and the secondary cell group SCG; a physical layer failure detected during communication between the terminal device and the main cell group MCG.

[0194] In some implementations, if the physical layer fault includes a physical layer fault detected during communication between the terminal device and a serving cell, the network device belongs to a network device to which the serving cell belongs.

[0195] In some implementations, if the physical layer failure includes a physical layer failure detected during communication between the terminal device and the SCG, the network device belongs to the MCG.

[0196] In some implementations, if the physical layer failure includes a physical layer failure detected during communication between the terminal device and the MCG, the network device belongs to the SCG.

[0197] In some implementations, the terminal device further includes: a processing unit, which is configured to start a second timer in response to the terminal device sending the first information.

[0198] In some implementations, the terminal device further includes: during the operation of the second timer, the terminal device expects the network device to perform an operation for restoring the wireless link.

[0199] In some implementations, if the physical layer failure includes a physical layer failure detected during communication between the terminal device and the service cell, the terminal device also includes: in response to the expiration of the second timer, the sending unit 1410 is also used to send a radio resource control RRC re-establishment request to the network device.

[0200] In some implementations, if the physical layer failure includes a physical layer failure detected during communication between the terminal device and the SCG, the terminal device also includes: in response to the expiration of the second timer, the sending unit 1410 is also used to send SCGFailureInformation to the network device, and / or indicate that the cause of the SCG failure is the expiration of the second timer.

[0201] In some implementations, if the physical layer failure includes a physical layer failure detected during the communication between the terminal device and the MCG, the terminal device also includes: in response to the expiration of the second timer, the sending unit 1410 is also used to send MCGFailureInformation to the network device, and / or indicate that the cause of the MCG failure is the expiration of the second timer.

[0202] In some implementations, the terminal device further includes: a processing unit, and in response to the second timing timeout, the processing unit is configured to start a third timer.

[0203] In some implementations, the terminal device also includes: if the third timer times out, the wireless link between the terminal device and the MCG has not been restored, and the prediction result determined based on the model indicates that RLF will occur in the wireless link between the terminal device and the MCG, the sending unit 1410 is also used to send an RRC re-establishment request to the MCG.

[0204] In some implementations, the RRC re-establishment request carries a prediction result determined based on a model.

[0205] In some implementations, the prediction result is used to indicate one or more of the following: the probability of RLF occurring in the wireless link between the terminal device and the network device; and whether RLF will occur in the wireless link between the terminal device and the network device.

[0206] In some implementations, the terminal device sends the first information to the network device, including: when a first condition is met, the terminal device sends the first information to the network device.

[0207] In some implementations, the terminal device sends the first information to the network device, including: in response to a fourth timer timing out and a prediction result determined based on a model during the operation of the fourth timer satisfies a first condition, the terminal device sends the first information to the network device.

[0208] In some implementations, starting of the fourth timer is triggered based on the first condition.

[0209] In some implementations, the first condition includes one or more of the following: an average value of the probability of RLF occurring in the wireless link predicted based on the model in the first time period is higher than the average value of the probability threshold of RLF occurring in the wireless link determined based on the first function configured based on the network device in the first time period; the first probability of RLF occurring in the wireless link predicted based on the model in the first time period is higher than the probability threshold of RLF occurring in the wireless link determined based on the first function in the first time period; the proportion of the first time duration in the total duration of the first time period is higher than a threshold, and the first time is the time period corresponding to the probability of RLF occurring in the wireless link predicted based on the model in the first time period being higher than the probability threshold of RLF occurring in the wireless link determined based on the first function.

[0210] In some implementations, before the terminal device sends the first information to the network device, the terminal device also includes: a receiving unit, used to receive first configuration information sent by the network device, and the first configuration information is used to configure the terminal device to determine the prediction result of RLF occurring in the wireless link based on a model.

[0211] In some implementations, the first configuration information is used to configure a first function, and the first function is used to determine a probability threshold of RLF occurring in a radio link within a first time period.

[0212] Fig.15 It is a schematic diagram of a terminal device according to an embodiment of the present application. Fig.15 The terminal device 1500 shown includes: a receiving unit 1510 .

[0213] The receiving unit 1510 is used to receive first information sent by a terminal device during the operation of a first timer, wherein the first information is used to indicate a prediction result of a radio link failure RLF occurring in a wireless link between the terminal device and the network device determined based on a model; wherein the first timer is triggered based on a physical layer fault detected by the terminal device.

[0214] In some implementations, the physical layer failure includes one of the following: a physical layer failure detected during communication between the terminal device and the service cell; a physical layer failure detected during communication between the terminal device and the secondary cell group SCG; a physical layer failure detected during communication between the terminal device and the main cell group MCG.

[0215] In some implementations, if the physical layer fault includes a physical layer fault detected during communication between the terminal device and a serving cell, the network device belongs to a network device to which the serving cell belongs.

[0216] In some implementations, if the physical layer failure includes a physical layer failure detected during communication between the terminal device and the SCG, the network device belongs to the MCG.

[0217] In some implementations, if the physical layer failure includes a physical layer failure detected during communication between the terminal device and the MCG, the network device belongs to the SCG.

[0218] In some implementations, the network device further includes: during the operation of a second timer, the network device is expected by the terminal device to perform an operation for restoring a wireless link; wherein the second timer is triggered based on the terminal device sending the first information.

[0219] In some implementations, if the physical layer failure includes a physical layer failure detected during communication between the terminal device and the service cell, the network device also includes: after the second timer expires, the receiving unit 1510 is also used to receive a radio resource control RRC re-establishment request sent by the terminal device.

[0220] In some implementations, if the physical layer failure includes a physical layer failure detected during communication between the terminal device and the SCG, the network device also includes: after the second timer expires, the receiving unit 1510 is also used to receive SCGFailureInformation sent by the terminal device, and / or indicates that the cause of the SCG failure is the expiration of the second timer.

[0221] In some implementations, if the physical layer failure includes a physical layer failure detected during the communication between the terminal device and the MCG, the network device also includes: after the second timer expires, the receiving unit 1510 is also used to receive the MCGFailureInformation sent by the terminal device, and / or indicates that the cause of the MCG failure is the expiration of the second timer.

[0222] In some implementations, the network device also includes: if the third timer times out, the wireless link between the terminal device and the MCG has not been restored, and the prediction result determined based on the model indicates that RLF will occur in the wireless link between the terminal device and the MCG, the network device to which the MCG belongs receives the RRC re-establishment request sent by the terminal device; wherein the third timer is triggered by the terminal device based on the expiration of the second timer.

[0223] In some implementations, the RRC re-establishment request carries a prediction result determined based on a model.

[0224] In some implementations, the prediction result is used to indicate one or more of the following: the probability of RLF occurring in the wireless link between the terminal device and the network device; and whether RLF will occur in the wireless link between the terminal device and the network device.

[0225] In some implementations, the terminal device receives the first information sent by the network device, including: when a first condition is met, the network device receives the first information sent by the terminal device.

[0226] In some implementations, the terminal device sends the first information to the network device, including: after a fourth timer times out, and during the operation of the fourth timer, a prediction result determined based on a model satisfies a first condition, and the network device receives the first information sent by the terminal device.

[0227] In some implementations, starting of the fourth timer is triggered based on the first condition.

[0228] In some implementations, the first condition includes one or more of the following: an average value of the probability of RLF occurring in the wireless link predicted based on the model in the first time period is higher than the average value of the probability threshold of RLF occurring in the wireless link determined based on the first function configured based on the network device in the first time period; the first probability of RLF occurring in the wireless link predicted based on the model in the first time period is higher than the probability threshold of RLF occurring in the wireless link determined based on the first function in the first time period; the proportion of the first time duration in the total duration of the first time period is higher than a threshold, and the first time is the time period corresponding to the probability of RLF occurring in the wireless link predicted based on the model in the first time period being higher than the probability threshold of RLF occurring in the wireless link determined based on the first function.

[0229] In some implementations, before the network device receives the first information sent by the terminal device, the network device also includes: a sending unit, used to send first configuration information to the terminal device, and the first configuration information is used to configure the terminal device to determine the prediction result of RLF occurring in the wireless link based on a model.

[0230] In some implementations, the first configuration information is used to configure a first function, and the first function is used to determine a probability threshold of RLF occurring in a radio link within a first time period.

[0231] In an optional embodiment, the sending unit 1410 may be a transceiver 1630. The terminal device 1400 may further include a processor 1610 and a memory 1620. Fig.16 shown.

[0232] In an optional embodiment, the receiving unit 1510 may be a transceiver 1630. The network device 1500 may further include a processor 1610 and a memory 1620. Fig.16 shown.

[0233] Fig.16 It is a schematic structural diagram of a communication device according to an embodiment of the present application. Fig.16 The dotted line in the figure indicates that the unit or module is optional. The device 1600 can be used to implement the method described in the above method embodiment. The device 1600 can be a chip, a terminal device or a network device.

[0234] The device 1600 may include one or more processors 1610. The processor 1610 may support the device 1600 to implement the method described in the method embodiment above. The processor 1610 may be a general-purpose processor or a special-purpose processor. For example, the processor may be a central processing unit (CPU). Alternatively, the processor may also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0235] The apparatus 1600 may further include one or more memories 1620. The memory 1620 stores a program, which can be executed by the processor 1610, so that the processor 1610 executes the method described in the above method embodiment. The memory 1620 may be independent of the processor 1610 or integrated in the processor 1610.

[0236] The apparatus 1600 may further include a transceiver 1630. The processor 1610 may communicate with other devices or chips through the transceiver 1630. For example, the processor 1610 may transmit and receive data with other devices or chips through the transceiver 1630.

[0237] The present application also provides a computer-readable storage medium for storing a program. The computer-readable storage medium can be applied to a terminal or network device provided in the present application, and the program enables a computer to execute the method performed by the terminal or network device in each embodiment of the present application.

[0238] The embodiment of the present application also provides a computer program product. The computer program product includes a program. The computer program product can be applied to the terminal or network device provided in the embodiment of the present application, and the program enables the computer to execute the method performed by the terminal or network device in each embodiment of the present application.

[0239] The embodiment of the present application also provides a computer program. The computer program can be applied to the terminal or network device provided in the embodiment of the present application, and the computer program enables a computer to execute the method executed by the terminal or network device in each embodiment of the present application.

[0240] It should be understood that the terms "system" and "network" in this application can be used interchangeably. In addition, the terms used in this application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application. The terms "first", "second", "third" and "fourth" in the specification and claims of this application and the accompanying drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions.

[0241] In the embodiments of the present application, the "indication" mentioned can be a direct indication, an indirect indication, or an indication of an association relationship. For example, A indicates B, which can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also mean that there is an association relationship between A and B.

[0242] In the embodiment of the present application, "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should be understood that determining B according to A does not mean determining B only according to A, and B can also be determined according to A and / or other information.

[0243] In the embodiments of the present application, the term "corresponding" may indicate that there is a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship of indication and being indicated, configuration and being configured, etc.

[0244] In the embodiments of the present application, "pre-definition" or "pre-configuration" can be implemented by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in a device (for example, including a terminal device and a network device), and the present application does not limit the specific implementation method. For example, pre-definition can refer to what is defined in the protocol.

[0245] In the embodiments of the present application, the “protocol” may refer to a standard protocol in the communication field, for example, it may include an LTE protocol, an NR protocol, and related protocols used in future communication systems, and the present application does not limit this.

[0246] In the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0247] In various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0248] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0249] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0250] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0251] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that can be read by a computer or a data storage device such as a server or data center that includes one or more available media integrated. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital video disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0252] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A method of wireless communication, It is characterized in that include: During the operation of the first timer, the terminal device sends first information to the network device, where the first information is used to indicate a prediction result of a radio link failure RLF occurring in a radio link between the terminal device and the network device determined based on a model; The first timer is triggered based on a physical layer failure detected by the terminal device.

2. The method according to claim 1, It is characterized in that The physical layer failure includes one of the following: A physical layer fault detected during communication between the terminal device and the serving cell; A physical layer fault detected during the communication between the terminal device and the secondary cell group SCG; A physical layer failure is detected during the communication between the terminal device and the main cell group MCG.

3. The method according to claim 2, It is characterized in that If the physical layer fault includes a physical layer fault detected during the communication between the terminal device and the serving cell, the network device belongs to the network device to which the serving cell belongs.

4. The method according to claim 2, It is characterized in that If the physical layer failure includes a physical layer failure detected during the communication between the terminal device and the SCG, the network device belongs to the MCG.

5. The method according to claim 2, It is characterized in that If the physical layer failure includes a physical layer failure detected during the communication between the terminal device and the MCG, the network device belongs to the SCG.

6. The method according to any one of claims 1 to 5, It is characterized in that The method further comprises: In response to the terminal device sending the first information, the terminal device starts a second timer.

7. The method according to claim 6, It is characterized in that The method further comprises: While the second timer is running, the terminal device expects the network device to perform an operation for restoring the wireless link.

8. The method according to any one of claims 1 to 7, It is characterized in that If the physical layer fault includes a physical layer fault detected during communication between the terminal device and the serving cell, the method further includes: In response to the expiration of the second timer, the terminal device sends a radio resource control RRC re-establishment request to the network device.

9. The method according to any one of claims 1 to 7, It is characterized in that If the physical layer fault includes a physical layer fault detected during communication between the terminal device and the SCG, the method further includes: In response to the expiration of the second timer, the terminal device sends SCGFailureInformation to the network device, and / or indicates that the cause of SCG failure is the expiration of the second timer.

10. The method according to any one of claims 1 to 7, It is characterized in that If the physical layer fault includes a physical layer fault detected during communication between the terminal device and the MCG, the method further includes: In response to the expiration of the second timer, the terminal device sends MCGFailureInformation to the network device, and / or indicates that the reason for the MCG failure is the expiration of the second timer.

11. The method according to claim 10, It is characterized in that The method further comprises: In response to the second timing timing out, the terminal device starts a third timer.

12. The method according to claim 11, It is characterized in that The method further comprises: If the third timer times out, the wireless link between the terminal device and the MCG has not been restored, and the prediction result determined based on the model indicates that RLF will occur in the wireless link between the terminal device and the MCG, the terminal device sends an RRC re-establishment request to the MCG.

13. The method according to claim 8 or 12, It is characterized in that The RRC re-establishment request carries a prediction result determined based on a model.

14. The method according to any one of claims 1 to 13, It is characterized in that The prediction result is used to indicate one or more of the following: A probability of RLF occurring in the wireless link between the terminal device and the network device; Whether RLF will occur in the wireless link between the terminal device and the network device.

15. The method according to any one of claims 1 to 14, It is characterized in that The terminal device sends first information to the network device, including: When the first condition is met, the terminal device sends the first information to the network device.

16. The method according to any one of claims 1 to 14, It is characterized in that The terminal device sends first information to the network device, including: In response to the fourth timer timing out and the prediction result determined based on the model during the operation of the fourth timer meets the first condition, the terminal device sends the first information to the network device.

17. The method of claim 16, It is characterized in that The start of the fourth timer is triggered based on the first condition.

18. The method according to any one of claims 15 to 17, It is characterized in that The first condition includes one or more of the following: An average value of the probability of RLF occurring in the radio link predicted based on the model in the first time period is higher than an average value of the probability threshold of RLF occurring in the radio link determined based on the first function configured by the network device in the first time period; A first probability of RLF occurring in the radio link predicted based on the model within the first time period is higher than a probability threshold of RLF occurring in the radio link determined based on the first function within the first time period; The proportion of the duration of the first time in the total duration of the first time period is higher than the threshold, and the first time is the time period corresponding to the probability of RLF occurring in the wireless link predicted based on the model within the first time period being higher than the probability threshold of RLF occurring in the wireless link determined based on the first function.

19. The method according to any one of claims 1 to 18, It is characterized in that Before the terminal device sends the first information to the network device, the method further includes: The terminal device receives first configuration information sent by the network device, where the first configuration information is used to configure the terminal device to determine a prediction result of RLF occurring in the wireless link based on a model.

20. The method of claim 19, It is characterized in that The first configuration information is used to configure a first function, and the first function is used to determine a probability threshold of RLF occurring in a radio link within a first time period.

21. A method of wireless communication, It is characterized in that include: During the operation of the first timer, the network device receives first information sent by the terminal device, where the first information is used to indicate a prediction result of a radio link failure RLF occurring in a radio link between the terminal device and the network device determined based on a model; The first timer is triggered based on a physical layer failure detected by the terminal device.

22. The method of claim 21, It is characterized in that The physical layer failure includes one of the following: A physical layer fault detected during communication between the terminal device and the serving cell; A physical layer fault detected during the communication between the terminal device and the secondary cell group SCG; A physical layer failure is detected during the communication between the terminal device and the main cell group MCG.

23. The method of claim 22, It is characterized in that If the physical layer fault includes a physical layer fault detected during the communication between the terminal device and the serving cell, the network device belongs to the network device to which the serving cell belongs.

24. The method of claim 22, It is characterized in that If the physical layer failure includes a physical layer failure detected during the communication between the terminal device and the SCG, the network device belongs to the MCG.

25. The method of claim 22, It is characterized in that If the physical layer failure includes a physical layer failure detected during the communication between the terminal device and the MCG, the network device belongs to the SCG.

26. The method according to any one of claims 21 to 25, It is characterized in that The method further comprises: During the running of the second timer, the network device is expected by the terminal device to perform an operation for recovering the wireless link; The second timer is triggered based on the terminal device sending the first information.

27. The method according to any one of claims 21 to 26, It is characterized in that If the physical layer fault includes a physical layer fault detected during communication between the terminal device and the serving cell, the method further includes: After the second timer times out, the network device receives a radio resource control RRC re-establishment request sent by the terminal device.

28. The method according to any one of claims 21 to 26, It is characterized in that If the physical layer fault includes a physical layer fault detected during communication between the terminal device and the SCG, the method further includes: After the second timer times out, the network device receives SCGFailureInformation sent by the terminal device, and / or indicates that the cause of the SCG failure is the timeout of the second timer.

29. The method according to any one of claims 21 to 26, It is characterized in that If the physical layer fault includes a physical layer fault detected during communication between the terminal device and the MCG, the method further includes: After the second timer times out, the network device receives the MCGFailureInformation sent by the terminal device, and / or indicates that the reason for the MCG failure is the timeout of the second timer.

30. The method of claim 29, It is characterized in that The method further comprises: If the third timer times out, the radio link between the terminal device and the MCG is not restored, and the prediction result determined based on the model indicates that RLF will occur in the radio link between the terminal device and the MCG, the network device to which the MCG belongs receives the RRC re-establishment request sent by the terminal device; The third timer is triggered by the terminal device based on the expiration of the second timer.

31. The method of claim 27 or 30, It is characterized in that The RRC re-establishment request carries a prediction result determined based on a model.

32. The method of any one of claims 21 to 31, It is characterized in that The prediction result is used to indicate one or more of the following: A probability of RLF occurring in the wireless link between the terminal device and the network device; Whether RLF will occur in the wireless link between the terminal device and the network device.

33. The method according to any one of claims 21 to 31, It is characterized in that The terminal device receives the first information sent by the network device, including: When the first condition is met, the network device receives the first information sent by the terminal device.

34. The method according to any one of claims 21 to 31, It is characterized in that The terminal device sends first information to the network device, including: After the fourth timer times out, and the prediction result determined based on the model during the operation of the fourth timer meets the first condition, the network device receives the first information sent by the terminal device.

35. The method of claim 34, It is characterized in that The start of the fourth timer is triggered based on the first condition.

36. The method of any one of claims 33 to 35, It is characterized in that The first condition includes one or more of the following: An average value of the probability of RLF occurring in the radio link predicted based on the model in the first time period is higher than an average value of the probability threshold of RLF occurring in the radio link determined based on the first function configured by the network device in the first time period; A first probability of RLF occurring in the radio link predicted based on the model within the first time period is higher than a probability threshold of RLF occurring in the radio link determined based on the first function within the first time period; The proportion of the duration of the first time in the total duration of the first time period is higher than the threshold, and the first time is the time period corresponding to the probability of RLF occurring in the wireless link predicted based on the model within the first time period being higher than the probability threshold of RLF occurring in the wireless link determined based on the first function.

37. The method according to any one of claims 21 to 36, It is characterized in that Before the network device receives the first information sent by the terminal device, the method further includes: The network device sends first configuration information to the terminal device, where the first configuration information is used to configure the terminal device to determine a prediction result of RLF occurring in the wireless link based on a model.

38. The method of claim 37, It is characterized in that The first configuration information is used to configure a first function, and the first function is used to determine a probability threshold of RLF occurring in a radio link within a first time period.

39. A terminal device, It is characterized in that include: A sending unit, configured to send first information to a network device during the operation of a first timer, wherein the first information is used to indicate a prediction result of a radio link failure RLF occurring in a radio link between the terminal device and the network device determined based on a model; The first timer is triggered based on a physical layer failure detected by the terminal device.

40. The terminal device according to claim 39, It is characterized in that The physical layer failure includes one of the following: A physical layer fault detected during communication between the terminal device and the serving cell; A physical layer fault detected during the communication between the terminal device and the secondary cell group SCG; A physical layer failure is detected during the communication between the terminal device and the main cell group MCG.

41. The terminal device according to claim 40, It is characterized in that If the physical layer fault includes a physical layer fault detected during the communication between the terminal device and the serving cell, the network device belongs to the network device to which the serving cell belongs.

42. The terminal device according to claim 40, It is characterized in that If the physical layer failure includes a physical layer failure detected during the communication between the terminal device and the SCG, the network device belongs to the MCG.

43. The terminal device according to claim 40, It is characterized in that If the physical layer failure includes a physical layer failure detected during the communication between the terminal device and the MCG, the network device belongs to the SCG.

44. The terminal device according to any one of claims 39 to 43, It is characterized in that The terminal device further includes: A processing unit, in response to the terminal device sending the first information, the processing unit is used to start a second timer.

45. The terminal device according to claim 44, It is characterized in that The terminal device further includes: While the second timer is running, the terminal device expects the network device to perform an operation for restoring the wireless link.

46. ​​The terminal device according to any one of claims 39 to 45, It is characterized in that If the physical layer fault includes a physical layer fault detected during communication between the terminal device and the serving cell, the terminal device further includes: In response to the second timer timing out, the sending unit is further configured to send a radio resource control (RRC) re-establishment request to the network device.

47. The terminal device according to any one of claims 39 to 45, It is characterized in that If the physical layer fault includes a physical layer fault detected during communication between the terminal device and the SCG, the terminal device further includes: In response to the expiration of the second timer, the sending unit is further used to send SCGFailureInformation to the network device, and / or indicate that the cause of SCG failure is the expiration of the second timer.

48. The terminal device according to any one of claims 39 to 45, It is characterized in that If the physical layer fault includes a physical layer fault detected during communication between the terminal device and the MCG, the terminal device further includes: In response to the expiration of the second timer, the sending unit is further used to send MCGFailureInformation to the network device, and / or indicate that the cause of MCG failure is the expiration of the second timer.

49. The terminal device according to claim 48, It is characterized in that The terminal device further includes: The processing unit is configured to start a third timer in response to the second timing timeout.

50. The terminal device according to claim 49, It is characterized in that The terminal device further includes: If the third timer times out, the wireless link between the terminal device and the MCG has not been restored, and the prediction result determined based on the model indicates that RLF will occur in the wireless link between the terminal device and the MCG, the sending unit is also used to send an RRC re-establishment request to the MCG.

51. The terminal device according to claim 46 or 50, It is characterized in that The RRC re-establishment request carries a prediction result determined based on a model.

52. The terminal device according to any one of claims 39 to 51, It is characterized in that The prediction result is used to indicate one or more of the following: A probability of RLF occurring in the wireless link between the terminal device and the network device; Whether RLF will occur in the wireless link between the terminal device and the network device.

53. The terminal device according to any one of claims 39 to 52, It is characterized in that The terminal device sends first information to the network device, including: When the first condition is met, the terminal device sends the first information to the network device.

54. The terminal device according to any one of claims 39 to 52, It is characterized in that The terminal device sends first information to the network device, including: In response to the fourth timer timing out and the prediction result determined based on the model during the operation of the fourth timer meets the first condition, the terminal device sends the first information to the network device.

55. The terminal device as claimed in claim 54, It is characterized in that The start of the fourth timer is triggered based on the first condition.

56. The terminal device according to any one of claims 53 to 55, It is characterized in that The first condition includes one or more of the following: An average value of the probability of RLF occurring in the radio link predicted based on the model in the first time period is higher than an average value of the probability threshold of RLF occurring in the radio link determined based on the first function configured by the network device in the first time period; A first probability of RLF occurring in the radio link predicted based on the model within the first time period is higher than a probability threshold of RLF occurring in the radio link determined based on the first function within the first time period; The proportion of the duration of the first time in the total duration of the first time period is higher than the threshold, and the first time is the time period corresponding to the probability of RLF occurring in the wireless link predicted based on the model within the first time period being higher than the probability threshold of RLF occurring in the wireless link determined based on the first function.

57. The terminal device according to any one of claims 39 to 56, It is characterized in that Before the terminal device sends the first information to the network device, the terminal device further includes: A receiving unit is used to receive first configuration information sent by the network device, where the first configuration information is used to configure the terminal device to determine a prediction result of RLF occurring in the wireless link based on a model.

58. The terminal device as claimed in claim 57, It is characterized in that The first configuration information is used to configure a first function, and the first function is used to determine a probability threshold of RLF occurring in a radio link within a first time period.

59. A network device, It is characterized in that include: A receiving unit, configured to receive, during the operation of the first timer, first information sent by a terminal device, wherein the first information is used to indicate a prediction result of a radio link failure RLF occurring in a radio link between the terminal device and the network device determined based on a model; The first timer is triggered based on a physical layer failure detected by the terminal device.

60. The network device according to claim 59, It is characterized in that The physical layer failure includes one of the following: A physical layer fault detected during communication between the terminal device and the serving cell; A physical layer fault detected during the communication between the terminal device and the secondary cell group SCG; A physical layer failure is detected during the communication between the terminal device and the main cell group MCG.

61. The network device according to claim 60, It is characterized in that If the physical layer fault includes a physical layer fault detected during the communication between the terminal device and the serving cell, the network device belongs to the network device to which the serving cell belongs.

62. The network device according to claim 60, It is characterized in that If the physical layer failure includes a physical layer failure detected during the communication between the terminal device and the SCG, the network device belongs to the MCG.

63. The network device according to claim 60, It is characterized in that If the physical layer failure includes a physical layer failure detected during the communication between the terminal device and the MCG, the network device belongs to the SCG.

64. The network device according to any one of claims 59 to 63, It is characterized in that The network device also includes: During the running of the second timer, the network device is expected by the terminal device to perform an operation for recovering the wireless link; The second timer is triggered based on the terminal device sending the first information.

65. The network device according to any one of claims 59 to 64, It is characterized in that If the physical layer fault includes a physical layer fault detected during communication between the terminal device and the serving cell, the network device further includes: After the second timer times out, the receiving unit is further used to receive a radio resource control RRC re-establishment request sent by the terminal device.

66. The network device according to any one of claims 59 to 64, It is characterized in that If the physical layer fault includes a physical layer fault detected during communication between the terminal device and the SCG, the network device further includes: After the second timer times out, the receiving unit is further used to receive SCGFailureInformation sent by the terminal device, and / or indicate that the cause of the SCG failure is the timeout of the second timer.

67. The network device according to any one of claims 59 to 64, It is characterized in that If the physical layer fault includes a physical layer fault detected during communication between the terminal device and the MCG, the network device further includes: After the second timer times out, the receiving unit is further used to receive MCGFailureInformation sent by the terminal device, and / or indicate that the cause of the MCG failure is the timeout of the second timer.

68. The network device according to claim 67, It is characterized in that The network device also includes: If the third timer times out, the radio link between the terminal device and the MCG is not restored, and the prediction result determined based on the model indicates that RLF will occur in the radio link between the terminal device and the MCG, the network device to which the MCG belongs receives the RRC re-establishment request sent by the terminal device; The third timer is triggered by the terminal device based on the expiration of the second timer.

69. The network device according to claim 65 or 68, It is characterized in that The RRC re-establishment request carries a prediction result determined based on a model.

70. The network device according to any one of claims 59 to 69, It is characterized in that The prediction result is used to indicate one or more of the following: A probability of RLF occurring in the wireless link between the terminal device and the network device; Whether RLF will occur in the wireless link between the terminal device and the network device.

71. The network device according to any one of claims 59 to 69, It is characterized in that The terminal device receives the first information sent by the network device, including: When the first condition is met, the network device receives the first information sent by the terminal device.

72. The network device according to any one of claims 59 to 69, It is characterized in that The terminal device sends first information to the network device, including: After the fourth timer times out, and the prediction result determined based on the model during the operation of the fourth timer meets the first condition, the network device receives the first information sent by the terminal device.

73. The network device of claim 72, It is characterized in that The start of the fourth timer is triggered based on the first condition.

74. The network device according to any one of claims 71 to 73, It is characterized in that The first condition includes one or more of the following: An average value of the probability of RLF occurring in the radio link predicted based on the model in the first time period is higher than an average value of the probability threshold of RLF occurring in the radio link determined based on the first function configured by the network device in the first time period; A first probability of RLF occurring in the radio link predicted based on the model within the first time period is higher than a probability threshold of RLF occurring in the radio link determined based on the first function within the first time period; The proportion of the duration of the first time in the total duration of the first time period is higher than the threshold, and the first time is the time period corresponding to the probability of RLF occurring in the wireless link predicted based on the model within the first time period being higher than the probability threshold of RLF occurring in the wireless link determined based on the first function.

75. The network device according to any one of claims 59 to 74, It is characterized in that Before the network device receives the first information sent by the terminal device, the network device further includes: A sending unit is used to send first configuration information to the terminal device, where the first configuration information is used to configure the terminal device to determine a prediction result of RLF occurring in the wireless link based on a model.

76. The network device of claim 75, It is characterized in that The first configuration information is used to configure a first function, and the first function is used to determine a probability threshold of RLF occurring in a radio link within a first time period.

77. A terminal device, It is characterized in that The terminal comprises a transceiver, a memory and a processor, wherein the memory is used to store programs, and the processor is used to call the programs in the memory and control the transceiver to receive or send signals, so that the terminal executes the method as described in any one of claims 1 to 20.

78. A network device, It is characterized in that It comprises a transceiver, a memory and a processor, wherein the memory is used to store programs, and the processor is used to call the programs in the memory and control the transceiver to receive or send signals so that the network device executes the method as described in any one of claims 21-38.

79. A device, It is characterized in that It comprises a processor, which is used to call a program from a memory so that the device executes the method as claimed in any one of claims 1 to 38.

80. A chip, It is characterized in that It comprises a processor, which is used to call a program from a memory so that a device equipped with the chip executes a method as claimed in any one of claims 1 to 38.

81. A computer readable storage medium, It is characterized in that A program is stored thereon, the program causing a computer to execute the method according to any one of claims 1 to 38.

82. A computer program product, It is characterized in that The method comprises a program which causes a computer to execute the method according to any one of claims 1 to 38.

83. A computer program, It is characterized in that The computer program causes a computer to execute the method according to any one of claims 1 to 38.

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