Wireless communication methods, terminal devices and network devices

Abstract

Provided are wireless communication methods, terminal devices and network devices. A method comprises: in the running period of a first timer, a terminal device sends to a network device first information, the first information being used to indicate a model-determined prediction result of occurrence of a radio link failure (RLF) on a radio link between the terminal device and the network device, wherein the first timer is triggered on the basis of a physical layer failure detected by the terminal device. In the embodiments of the present application, in the running period of the first timer that is triggered on the basis of a physical layer failure detected by the terminal device, the terminal device sends the first information to the network device, the first information being used to indicate the model-determined prediction result of occurrence of an RLF on the radio link between the terminal device and the network device; thus, on the basis of the first information, the network device may improve the radio link quality prior to occurrence of an RLF, thereby preventing data transmission interruption caused by RLFs.

Description

Method, terminal device and network device for wireless communication TECHNICAL FIELD

[0001] The present application relates to the technical field of communication, and more particularly, to a method, a terminal device and a network device for wireless communication. BACKGROUND

[0002] With the development of communication technology, model prediction technology has been widely applied in the field of wireless communication, but how to predict radio link failure (RLF) based on model in the traditional wireless link monitoring process is a problem to be solved.

[0003] SUMMARY

[0004] The present application provides a method, a terminal device and a network device for wireless communication. The various aspects of the present application are described below.

[0005] In a first aspect, a method for wireless communication is provided, comprising: during running of a first timer, sending, by a terminal device, first information to a network device, the first information being used to indicate a prediction result of radio link failure (RLF) of 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 failure detected by the terminal device.

[0006] In a second aspect, a method for wireless communication is provided, comprising: during running of a first timer, receiving, by a network device, first information sent by a terminal device, the first information being used to indicate a prediction result of radio link failure (RLF) of 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 failure detected by the terminal device.

[0007] In a third aspect, a terminal device is provided, comprising: a sending unit configured to, during running of a first timer, send first information to a network device, the first information being used to indicate a prediction result of radio link failure (RLF) of 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 failure detected by the terminal device.

[0008] In a fourth aspect, a network device is provided, comprising: a receiving unit configured to, during running of a first timer, receive first information sent by a terminal device, the first information being used to indicate a prediction result of radio link failure (RLF) of 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 failure detected by the terminal device.

[0009] In a fifth aspect, a terminal device is provided, which includes a processor, a memory, and a communication interface. The memory is configured to store one or more computer programs. The processor is configured to invoke the computer programs in the memory, so that the terminal device performs some or all of the steps in the method of the first aspect.

[0010] In a sixth aspect, a network device is provided, which includes a processor, a memory, and a transceiver. The memory is configured to store one or more computer programs. The processor is configured to invoke the computer programs in the memory, so that the network device performs some or all of the steps in the method of the second aspect.

[0011] In a seventh aspect, a communication system is provided, which includes the terminal device and / or the network device described above. In another possible design, the system can further include other devices interacting with the terminal device or the network device in the solutions provided by the embodiments of the present application.

[0012] In an eighth aspect, a computer-readable storage medium is provided, which stores a computer program. The computer program causes a communication device (e.g., a terminal device or a network device) to perform some or all of the steps in the methods of the above aspects.

[0013] In a ninth aspect, a computer program product is provided, which includes a non-transitory computer-readable storage medium storing a computer program. The computer program is operable to cause a communication device (e.g., a terminal device or a network device) to perform some or all of the steps in the methods of the above aspects. In some implementations, the computer program product can be a software installation package.

[0014] In a tenth aspect, a chip is provided, which includes a memory and a processor. The processor can invoke and run a computer program from the memory, to implement some or all of the steps described in the methods of the above aspects.

[0015] In the embodiments of the present application, during the running of the first timer triggered based on the physical fault detected by the terminal device, the terminal device sends first information to the network device. The first information is used to indicate the prediction result of the RLF of the wireless link between the terminal device and the network device determined based on the model. Based on the first information, the network device can 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 DRAWINGS

[0016] FIG. 1 is a wireless communication system 100 to which the embodiments of the present application are applied.

[0017] FIG. 2 is a schematic flowchart of a wireless link monitoring procedure.

[0018] FIG. 3 is a schematic flowchart of an RLF detection procedure to which embodiments of the present application are applicable.

[0019] FIG. 4 is a schematic flowchart of another RLF detection procedure to which embodiments of the present application are applicable.

[0020] FIG. 5 is a schematic flowchart of an RLF detection procedure for a secondary cell group (SCG) to which embodiments of the present application are applicable.

[0021] FIG. 6 is a schematic flowchart of an RLF detection procedure for a master cell group (MCG) to which embodiments of the present application are applicable.

[0022] FIG. 7 is a schematic flowchart of a method of wireless communication provided by embodiments of the present application.

[0023] FIG. 8 is an example graph of a first function and a probability that a wireless link determined based on a model experiences an RLF.

[0024] FIG. 9 is an example graph of a combination scheme of a first information and first configuration information.

[0025] FIG. 10 is an example graph of another combination scheme of a first information and first configuration information.

[0026] FIG. 11 is an example graph of a combination scheme of a first information and a second timer.

[0027] FIG. 12 is an example graph of another combination scheme of a first information and a second timer.

[0028] FIG. 13 is an example graph of a combination scheme of a first information, a second timer, and a third timer.

[0029] FIG. 14 is a schematic diagram of a terminal device according to an embodiment of the present application.

[0030] FIG. 15 is a schematic diagram of a network device according to an embodiment of the present application.

[0031] FIG. 16 is a schematic structural diagram of a communication apparatus according to an embodiment of the present application. DETAILED DESCRIPTION

[0032] The technical solutions in the present application will be described below with reference to the accompanying drawings.

[0033] Wireless communication system

[0034] FIG. 1 is a wireless communication system 100 to which embodiments of the present application are applied. The wireless communication system 100 can include a network device 110 and a terminal device 120. The network device 110 can be a device that communicates with the terminal device 120. The network device 110 can provide communication coverage for a specific geographic area and can communicate with the terminal device 120 located in the coverage area.

[0035] FIG. 1 exemplarily shows one network device and two terminals. Alternatively, the wireless communication system 100 can include a plurality of network devices and each network device can include other numbers of terminal devices within the coverage range, which are not limited by embodiments of the present application.

[0036] Alternatively, the wireless communication system 100 can further include a network controller, a mobile management entity, and other network entities, which are not limited by embodiments of the present application.

[0037] It should be understood that the technical solutions of embodiments of the present application can be applied to various communication systems, for example, a 5th generation (5G) system or new radio (NR), a long term evolution (LTE) system, an LTE frequency division duplex (FDD) system, an LTE time division duplex (TDD), and the like. The technical solutions provided by the present application can also be applied to future communication systems, such as a 6th generation mobile communication system, a satellite communication system, and the like.

[0038] The terminal device in the embodiments of the present application can also be referred to as a user equipment (UE), an access terminal, a user unit, a user station, a mobile station, a mobile station (MS), a mobile terminal (MT), a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent or a user apparatus. The terminal device in the embodiments of the present application can refer to a device that provides voice and / or data connectivity for a user, and can be used to connect people, things and machines, for example, handheld devices with wireless connection functions, vehicle-mounted devices, etc. The terminal device in the embodiments of the present application can be a mobile phone, a tablet computer (Pad), a notebook computer, a palm computer, 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, which provides a sidelink signal 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.

[0039] The network device in the embodiments of the present application can be a device for communicating with a terminal device, and the network device can also be referred to as an access network device or a radio access network device, for example, the network device can be a base station. The network device in the embodiments of the present application can refer to a radio access network (RAN) node (or device) for accessing a terminal device to a wireless network. The base station can broadly cover various names in the following or be replaced by the following names, such as: Node B (NodeB), evolved Node B (eNB), next generation Node B (gNB), relay station, access point, transmitting and receiving point (TRP), transmitting 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, baseband 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, modem or chip used in the foregoing devices or apparatuses. The base station can also be a mobile switching center and a device that undertakes the function of a base station in device-to-device (D2D), vehicle-to-everything (V2X), machine-to-machine (M2M) communication, network side device in 6G network, device that undertakes the function of a base station in future communication systems, etc. The base station can support networks of the same or different access technologies. The embodiments of the present application do not limit the specific technology and specific device form adopted by the network device.

[0040] The base station can be fixed or mobile. For example, a helicopter or a drone can be configured to act as a mobile base station, and one or more cells can move according to the location of the mobile base station. In other examples, a helicopter or a drone can be configured to act as a device that communicates with another base station.

[0041] In some deployments, the network device in the embodiments of the present application can refer to a CU or a DU, or the network device includes a CU and a DU. The gNB can also include an AAU.

[0042] The network device and the terminal device can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; can also be deployed on water surface; can also be deployed on aircraft, balloons and satellites in the air. The scenarios in which the network device and the terminal device are located are not limited in the embodiments of the present application.

[0043] It should be understood that all or part of the functions of the communication device in the present application can also be implemented by software functions running on hardware, or by virtualized functions instantiated on a platform (such as a cloud platform).

[0044] Wireless link monitoring

[0045] In a cellular wireless network, as the user moves, the communication quality of the wireless link can change at any time. If the wireless channel temporarily deteriorates due to fast fading, the correct transmission of data can be ensured through hybrid automatic repeat request (HARQ), radio link control (RLC) retransmission, etc. If the wireless channel changes from line-of-sight (LOS) to non-line-of-sight (NLOS), or for other reasons, it is below a certain threshold and the duration reaches a certain length, it may not be possible to achieve the purpose of correct transmission through retransmission. In order to detect the situation of wireless link deterioration in time, the 3rd generation partnership project (3GPP) introduces wireless link monitoring.

[0046] The basic flow of wireless link monitoring is shown in FIG. 2. The terminal device bottom layer (e.g., the physical layer of the terminal device) continuously measures the downlink reference signal, such as the synchronization signal 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 block error rate (BLER) of the wireless link that the terminal device (e.g., UE) can achieve for receiving downlink data under the premise of the SINR of the current wireless channel according to the receiver performance of the terminal device. Then, the terminal device reports an in sync (IS) indication (or an out of sync (OOS) indication) to the terminal device upper layer (e.g., the radio resource control (RRC) layer of the terminal device) according to the BLER. The specific reporting flow is as follows: if the BLER is lower than a 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 a 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 upper layer receives a number of consecutive OOS indications reaching N310, the timer T310 is started. During the running of the timer T310, if the terminal device upper layer receives a number of consecutive IS indications reaching N311, it is considered that the wireless link has recovered to normal. If the wireless link has not recovered after the expiration of the timer T310, the terminal device upper layer considers that the RLF has occurred.

[0047] In the baseline version of R15, if the terminal device considers that the RLF has occurred, the terminal device initiates RRC re-establishment, selects a cell, and sends an RRC re-establishment request message, i.e., RRCReestablishmentRequest, which carries the cause of RRC re-establishment. The specific values include three types: reconfiguration failure, handover failure, and other failures, as shown in FIG. 3.

[0048] In order to reduce the probability of RLF, 3GPP introduces timer TTT and timer T312, see Fig. 4 for the detailed procedure. When the number of OOS indications reported by the lower layer 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 (e.g. base station). If the measurement reporting condition configured by the network device is met, the terminal device starts timer TTT. If the result of layer 3 measurement always meets the measurement reporting condition during the running of timer TTT, the terminal device reports the measurement report to the network device when timer TTT expires, and starts timer T312. During the running of timer T312, the terminal device expects that the network device can take some measures to restore the wireless link, such as increasing the downlink signal power. If timer T312 expires and the wireless link has not been restored (i.e. no consecutive N311 IS indications are detected), the terminal device initiates RRC re-establishment. The mechanism of timer TTT and timer T312 is optional. If the network device configures it, the terminal device runs timer TTT and timer T312 according to the procedure in Fig. 4. If timer T312 expires (usually before timer T310 expires), the terminal device initiates RRC re-establishment request. If the network device does not configure the mechanism of timer TTT and timer T312, or configures it but timer TTT is not started, or timer T312 is running when timer T310 expires, the terminal device triggers RRC re-establishment request when timer T310 expires.

[0049] After introducing dual connectivity (DC), the terminal device can simultaneously connect to the cells of two network devices, i.e. MCG and SCG exist simultaneously. Therefore, the terminal device simultaneously performs wireless link monitoring on MCG and SCG, and the monitoring results on the two sides are independent. The terminal device judges whether RLF occurs according to the monitoring results. In the initial protocol version, it is assumed that the wireless connection of MCG is more reliable than that of SCG, so the designed RLF processing procedure is (see Fig. 5): if the terminal device detects that RLF occurs in SCG, it reports this situation to MCG through SCGFailureInformation message, wherein the RLF detection procedure on SCG can use the aforementioned timer TTT and timer T312 (if configured by the network device), and the SCGFailureInformation message carries the SCG failure reason, which has three specific values: T30 timeout, T321 timeout, and others; if it is monitored that RLF occurs in MCG, the terminal device initiates RRC re-establishment procedure.

[0050] Since the low frequency band used by NR is less and the high frequency band is more, the premise that "the wireless connection of MCG is more reliable than that of SCG" does not necessarily hold in the actual application scenarios of 5G. In view of this, 3GPP introduced the MCG fast recovery procedure in Rel-16 version, as shown in FIG. 6. If the terminal device detects RLF in MCG, the SCG can still transmit normally, and the MCGFailureInformation message is reported to the SCG, which carries the MCG failure reason, and the specific value contains three kinds: T310 timeout, T312 timeout, and other, while starting the timer T316. During the running of the timer T316, the terminal device waits for the network device side to take measures to update the parameters and try to recover the wireless link of MCG. If the timer T316 times out and no recovery operation is received from the network device side, the terminal device initiates the radio link re-establishment procedure, that is, sends the RRC re-establishment request to the MCG.

[0051] With the development of communication technology, model prediction technology has been widely applied in the field of wireless communication, but how to predict RLF based on model in the traditional wireless link monitoring procedure is a problem to be solved.

[0052] Taking an artificial intelligence (AI) model as an example, referring to the RLF detection procedure of FIG. 3, the terminal device initiates the RRC re-establishment procedure only after RLF occurs, which may cause data transmission interruption. With the continuous progress of AI technology, it is inevitable to use AI models to predict RLF, so that some preparations can be made in advance according to the prediction results based on AI models before RLF occurs to prevent the interruption of data transmission caused by RLF. 3GPP has decided to prioritize the use of AI models in the scenario of T310 timeout in R19 version, but has not specified how to combine the prediction based on AI models with the traditional wireless link monitoring.

[0053] To solve the above problem, the embodiment of the present application provides a wireless communication method. During the running of a first timer triggered based on a physical failure detected by a terminal device, the terminal device sends first information to a network device, the first information being used to indicate a prediction result of radio link failure (RLF) between the terminal device and the network device determined based on a model. Based on the first information, the network device can improve the quality of the wireless link before the RLF occurs to avoid the interruption of data transmission caused by the RLF.

[0054] The wireless communication method of the embodiment of the present application is described below in combination with FIG. 7. FIG. 7 is a schematic flowchart of the wireless communication method of the embodiment of the present application. The method shown in FIG. 7 includes step S710.

[0055] In step S710, the terminal device sends first information to the network device during running of the first timer. Correspondingly, the network device receives the first information sent by the terminal device during running of the first timer.

[0056] In some implementations, the first timer is triggered based on a physical failure detected by the terminal device, that is, the terminal device detects a physical layer failure, and starts the first timer.

[0057] In some implementations, the physical layer failure detected by the terminal device can be understood as that the terminal device high layer receives N310 consecutive OOS indications reported by the terminal device bottom layer, and then the terminal device determines that the physical layer failure is detected. For example, referring to FIG. 2, the first timer is timer T310, the terminal device high layer receives N310 consecutive OOS indications reported by the terminal device bottom layer, and then the terminal device determines that the physical layer failure is detected, and starts the timer T310.

[0058] In some implementations, the physical layer failure includes a physical layer failure detected in a communication process between the terminal device and a serving cell.

[0059] In some implementations, the physical layer failure detected in the communication process between the terminal device and the serving cell can be understood as that, in the communication process between the terminal device and the serving cell, the terminal device high layer receives N310 consecutive OOS indications reported by the terminal device bottom layer, and then the terminal device determines that the physical layer failure is detected.

[0060] In some implementations, if the physical layer failure includes a physical layer failure detected in a communication process 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 belonging to the serving cell.

[0061] In some implementations, the physical layer failure includes a physical layer failure detected in a communication process between the terminal device and an SCG.

[0062] In some implementations, the physical layer failure detected in the communication process between the terminal device and the SCG can be understood as that, in the communication process between the terminal device and the SCG, the terminal device high layer receives N310 consecutive OOS indications reported by the terminal device bottom layer, and then the terminal device determines that the physical layer failure is detected.

[0063] In some implementations, if the physical layer failure includes a physical layer failure detected in a communication process between the terminal device and the SCG, the network device receiving the first information belongs to an MCG. For example, the network device receiving the first information is an access network device belonging to the MCG.

[0064] In some implementations, the physical layer failure comprises a physical layer failure detected in a communication process between the terminal device and the MCG.

[0065] In some implementations, the physical layer failure detected in the communication process between the terminal device and the MCG can be understood as that, in the communication process between the terminal device and the MCG, the terminal device high layer receives continuous N310 OOS indications reported by the terminal device bottom layer, and the terminal device determines that the physical layer failure is detected.

[0066] In some implementations, if the physical layer failure comprises the physical layer failure detected in the communication process 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.

[0067] 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 high layer. When the terminal device high layer receives a number of continuous OOS indications reaching N310, the terminal device determines that the physical layer failure is detected, starts timer T310, and during the running of timer T310, the terminal device can send the first information to the network device to which the serving cell belongs.

[0068] The related scheme of the first information is introduced below in combination with Embodiment 1.

[0069] Embodiment 1: First information

[0070] In some implementations, the first information is used to indicate a prediction result of the RLF of the radio link between the terminal device and the network device determined based on a model.

[0071] In some implementations, the prediction result of the RLF of the radio link between the terminal device and the network device determined based on the model can be understood as a result obtained by predicting the RLF of the radio link between the terminal device and the network device by using the model.

[0072] In the embodiments of the present application, the type of the above-mentioned model is not limited. In some implementations, the above-mentioned model can be an AI model. For example, the above-mentioned model can be a convolution neural network (CNN), a recurrent neural network (RNN), a graph neural network (GNN), a transformer, etc. Of course, in the embodiments of the present application, the above-mentioned model can also be a model of a self-defined type.

[0073] In the embodiments of the present application, the method for determining the prediction result based on the model is not limited. For example, the terminal device uses the physical layer parameters (such as received signal strength indicator (RSSI), SINR and link quality indicator (LQI)) and packet reception rate (PRR) as model inputs, and uses Bayesian classifier, Logistic regression and CNN to make prediction, and obtains the prediction result.

[0074] In some implementations, the prediction result can be used to indicate one or more of the following: the probability of RLF of the wireless link between the terminal device and the network device; whether the wireless link between the terminal device and the network device will have RLF.

[0075] In some implementations, the probability of RLF of the wireless link between the terminal device and the network device can also be referred to as a specific prediction condition determined based on the model.

[0076] In some implementations, the probability of RLF of the wireless link between the terminal device and the network device can be understood as the probability of future RLF of the wireless link between the terminal device and the network device.

[0077] In some implementations, the probability of RLF of the wireless link between the terminal device and the network device can be understood as a statistical value of the probability of RLF of the wireless link between the terminal device and the network device. For example, the highest probability, the lowest probability, the average probability, etc.

[0078] In some implementations, the probability of RLF of the wireless link between the terminal device and the network device can be understood as the probability of RLF of the wireless link between the terminal device and the network device in a first time period, or the probability of RLF of the wireless link between the terminal device and the network device in a future first time period.

[0079] 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 window. For example, the first time period is used to indicate a future window of 10 minutes.

[0080] 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].

[0081] In some implementations, the start time and the end time can 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 a time point of "current time + T1".

[0082] In some implementations, the start time and the end time can 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", and the end time of the first time period is "current time + T2", and the first time period indicates a time period from "current time + T1" to "current time + T2".

[0083] In some implementations, the value of the start time can be 0, and the first time period is used to indicate a time period from the current time to the end time. For example, the first time period is [T1, T2], T1 has a value of 0, and the first time period indicates a time period from the current time to T2.

[0084] In some implementations, the first time period can be predefined. For example, the protocol specifies that the first time period is [0, 10], indicating a time period from the current time to 10 minutes later.

[0085] In 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.

[0086] In some implementations, the probability of the radio link between the terminal device and the network device occurring RLF in the first time period can be understood as the probability of the radio link between the terminal device and the network device occurring RLF 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 the radio link between the terminal device and the network device occurring RLF at T1', and the probability P2 of the radio link between the terminal device and the network device occurring RLF at T2'.

[0087] In some implementations, the probability of the radio link between the terminal device and the network device occurring RLF in the first time period can be understood as a statistical value of the probability of the radio link between the terminal device and the network device occurring RLF 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 the radio link between the terminal device and the network device occurring RLF in the [T1, T2] time period: the highest probability, the lowest probability, and the average probability.

[0088] In some implementations, whether the wireless link between the terminal device and the network device will experience the RLF can be understood as whether the wireless link between the terminal device and the network device will experience the RLF in the future.

[0089] In some implementations, whether the wireless link between the terminal device and the network device will experience the RLF can be understood as whether the wireless link between the terminal device and the network device will experience the RLF in a first time period.

[0090] In some implementations, the prediction result indicating whether the wireless link between the terminal device and the network device will experience the RLF can be understood as the prediction result indicating that the wireless link between the terminal device and the network device will experience the RLF.

[0091] In some implementations, the prediction result indicating whether the wireless link between the terminal device and the network device will experience the RLF can be understood as the prediction result indicating that the wireless link between the terminal device and the network device will not experience the RLF.

[0092] In some implementations, the prediction result indicating whether the wireless link between the terminal device and the network device will experience the RLF can be understood as the prediction result indicating that the wireless link between the terminal device and the network device will experience the RLF in a first time period. For example, the first time period is [T1, T2], and the prediction result indicates that the wireless link between the terminal device and the network device will experience the RLF in the time period [T1, T2].

[0093] In some implementations, the prediction result indicating whether the wireless link between the terminal device and the network device will experience the RLF can be understood as the prediction result indicating that the wireless link between the terminal device and the network device will not experience the RLF in a first time period. For example, the first time period is [T1, T2], and the prediction result indicates that the wireless link between the terminal device and the network device will not experience the RLF in the time period [T1, T2].

[0094] In some implementations, if the prediction result indicates whether the wireless link between the terminal device and the network device will experience the RLF, the first information sent by the terminal device to the network device is carried in an enumeration variable. For example, the enumeration variable has a first constant and a second constant, when the enumeration variable takes the first constant, it indicates that the wireless link between the terminal device and the network device will experience the RLF, and when the enumeration variable takes the second constant, it indicates that the wireless link between the terminal device and the network device will not experience the RLF, wherein the first constant and the second constant are different.

[0095] In the embodiments of the present application, the method for determining whether the RLF of the wireless link between the terminal device and the network device will occur is not limited. In some implementations, if the probability of the RLF of the wireless link predicted based on the model is greater than the threshold configured by the network device, the prediction result can indicate that the RLF of the wireless link between the terminal device and the network device will occur. In some implementations, if the minimum probability of the RLF of the wireless link predicted based on the model occurring in the first time period is greater than the threshold configured by the network device, the prediction result can indicate that the RLF of the wireless link between the terminal device and the network device will occur in the first time period. In other implementations, if the minimum probability of the RLF of the wireless link predicted based on the model occurring in the first time period is lower than the threshold configured by the network device, the prediction result can indicate that the RLF of the wireless link between the terminal device and the network device will not occur in the first time period.

[0096] In some implementations, the first condition is met, and 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.

[0097] In some implementations, the first condition includes one or more of the following: the average of the probabilities of the RLF of the wireless link predicted based on the model in the first time period is higher than the average of the probability thresholds of the RLF of the wireless link determined based on the first function configured by the network device in the first time period; the first probability of the RLF of the wireless link predicted based on the model in the first time period is higher than the probability threshold of the RLF of the wireless link determined based on the first function in the first time period; the proportion of the length of the first time in the total length of the first time period is higher than a threshold, and the first time is the time period corresponding to the probability of the RLF of the wireless link predicted based on the model being higher than the probability threshold of the RLF of the wireless link determined based on the first function in the first time period.

[0098] In some implementations, the first function configured by the network device can be configured by the network device through an RRC message. Of course, in the embodiments of the present application, the first function configured by the network device can also be configured by the network device through other messages.

[0099] In some implementations, the first function is used to determine a probability threshold of the radio link experiencing the RLF in the first time period. It can be understood that the first function is a probability threshold of the radio link experiencing the RLF 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 the radio link between the terminal device and the network device experiencing the RLF gradually increases over time. The network device configures the probability threshold of the radio link experiencing the RLF at a future time, and uses the first function to represent the future time, which includes the first time period. The terminal device can determine the probability threshold of the radio link experiencing the RLF in the first time period configured by the network device based on the first function. For another example, the first function is P = f(win), as shown in the curve representing the implementation in FIG. 8, the parameter win is time, the vertical coordinate P is the probability threshold of the radio link experiencing the RLF at the time win, the first time period is the time period [T1, T2] on the horizontal coordinate win, and the probability threshold of the radio link experiencing the RLF in the first time period configured by the network device can be determined based on the first function.

[0100] In some implementations, the first condition includes that an average value of the probability of the radio link experiencing the RLF predicted based on the model in the first time period is higher than an average value of the probability threshold of the radio link experiencing the RLF 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 the radio link experiencing the RLF predicted based on the model in the first time period is higher than the average value of the probability threshold of the radio link experiencing the RLF determined based on the first function configured by the network device in the first time period, the first condition is met. For example, the network device configures the first function and the first time period through the RRC message, the first time period is [T1, T2], and the first function is P = f(win). As shown in the solid curve representing the implementation in FIG. 8, the probability threshold of the radio link experiencing the RLF determined based on the first function is the vertical coordinate of the solid curve representing the implementation in FIG. 8. The probability of the radio link experiencing the RLF predicted based on the model is the vertical coordinate of the dashed curve representing the implementation in FIG. 8. If the average value of the vertical coordinate of the dashed curve representing the implementation in FIG. 8 is higher than the average value of the vertical coordinate of the solid curve representing the implementation in FIG. 8 in the time period [T1, T2], 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 comprises that a first probability of the wireless link experiencing the RLF based on the model prediction in a first time period is higher than a probability threshold of the wireless link experiencing the RLF determined based on the first function in the first time period. It can be understood that the first condition is satisfied if at least one first probability of the wireless link experiencing the RLF based on the model prediction in the first time period is higher than the probability threshold of the wireless link experiencing the RLF determined based on the first function in the first time period. 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). Referring to the curve represented by the solid line in FIG. 8, the probability threshold of the wireless link experiencing the RLF determined based on the first function is the ordinate of the curve represented by the solid line in FIG. 8. Referring to the curve represented by the dashed line in FIG. 8, the probability of the wireless link experiencing the RLF predicted by the terminal device based on the model is the ordinate of the curve represented by the dashed line in FIG. 8. If there is at least one point in the time period [T1, T2] at which the ordinate of the curve represented by the dashed line is higher than the ordinate of the curve represented by the solid line, the first condition is satisfied, and the terminal device can send the first information to the network device.

[0102] In some implementations, the first condition comprises that a proportion of a time length of a first time in a total time length of the first time period is higher than a threshold, the first time being a time period corresponding to a probability of the wireless link experiencing the RLF based on the model prediction being higher than a probability threshold of the wireless link experiencing the RLF determined based on the first function in the first time period. It can be understood that the first condition is satisfied if the proportion of the time length of the first time in the total time length of the first time period is higher than the threshold. 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). Referring to the curve represented by the solid line in FIG. 8, the probability threshold of the wireless link experiencing the RLF determined based on the first function is the ordinate of the curve represented by the solid line in FIG. 8. Referring to the curve represented by the dashed line in FIG. 8, the probability of the wireless link experiencing the RLF predicted by the terminal device based on the model is the ordinate of the curve represented by the dashed line in FIG. 8. In the time period [T1, T2], the time period in which the ordinate of the curve represented by the dashed line is higher than the ordinate of the curve represented by the solid line is [T1', T2], i.e., the first time. The time length of the first time is T2-T1', and the total time length 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 satisfied, and the terminal device sends the first information to the network device.

[0103] In some implementations, the threshold can be predefined. For example, the protocol specifies that the threshold is 70%.

[0104] In some other implementations, the threshold can be preconfigured. For example, the network device configures the threshold to be 70% through an RRC message.

[0105] In the embodiments of the present application, the first condition can be used to determine the prediction result. In some implementations, if the first condition is met, the prediction result can indicate that the radio link between the terminal device and the network device will experience RLF; if the first condition is not met, the prediction result can indicate that the radio link between the terminal device and the network device will not experience RLF.

[0106] In some implementations, in response to the fourth timer expiring and the prediction result determined based on the model meeting the first condition during the running of the fourth timer, the terminal device sends the first information to the network device.

[0107] In some implementations, the starting of the fourth timer is triggered based on the first condition, that is, the first condition is met, the terminal device starts the fourth timer, or if the first condition is true, 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 true, the terminal device starts the timer T_rlf.

[0108] In some implementations, in response to the fourth timer expiring and the prediction result determined based on the model meeting the first condition during the running of the fourth timer, the terminal device sends the first information to the network device, which can be understood as that, during the running of the fourth timer, if the prediction result determined based on the model meets the first condition, the terminal device sends the first information to the network device after the fourth timer expires. For example, the fourth timer is T_rlf, and if the terminal device determines that the first condition is true, the terminal device starts the timer T_rlf, and during the running of the timer T_rlf, the terminal device continues to determine the prediction result based on the model. If the terminal device determines that the first condition is true during this period, the terminal device sends the first information to the network device after the timer T_rlf expires.

[0109] In some implementations, the first information is carried in the RRC re-establishment request. For example, the RRCReestablishmentRequest message carries the first information, and the terminal device reports the first information to the network device by sending the RRCReestablishmentRequest message. Using the existing message to carry the first information helps to reduce the overhead.

[0110] In some implementations, if the first information is carried in the RRC re-establishment request, the RRC re-establishment request can indicate that the reason for the RRC re-establishment is the model predicting RLF. For example, referring to FIG. 9, the first timer is the timer T310, and during the running of the timer T310, the terminal device determines the prediction result based on the model. If the first condition is met, the terminal device sends the 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 predicting RLF.

[0111] In some implementations, the first information is carried in a newly defined message. For example, referring to FIG. 10, the newly defined message is RLF predication information, and the first timer is timer T310. During the running of the timer T310, the terminal device determines a prediction result based on the model. If the first condition is met, the terminal device sends the RLF predication information to the network device, and the RLF predication information carries the first information. 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 information helps to improve the flexibility of transmitting the first information.

[0112] In some implementations, the newly defined message can be an RRC message or a medium access control control element (MAC CE).

[0113] Embodiment 2: First configuration information

[0114] In some implementations, before the terminal device sends the first information to the network device, the network device sends first configuration information to the terminal device. The first configuration information is used to configure the terminal device to determine a prediction result of the wireless link experiencing RLF based on the model. That is, the first configuration information is used to configure the terminal device to determine the first information. Accordingly, after receiving the first configuration information sent by the network device, the terminal device 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 terminal device determines the first information, generates the first information, and reports the first information to the network device.

[0115] In some implementations, the first configuration information is used to configure the terminal device to determine a prediction result of the wireless link experiencing RLF based on the model. It can be understood that the first configuration information is used to configure the terminal device to predict parameters required for the wireless link to experience RLF based on the model. For example, the first configuration information can configure the first function and / or the first time period described above.

[0116] In some implementations, the first configuration information can be used to indicate whether the terminal device reports the prediction result determined based on the model, or in other words, the first configuration information can be used to indicate whether the terminal device reports the first information.

[0117] 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 carries a Boolean variable indicating whether the terminal device reports the prediction result determined based on the model. The Boolean variable takes a first value, indicating that the terminal device reports the prediction result determined based on the model. The Boolean variable takes a second value, indicating that the terminal device does not report the prediction result determined 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.

[0118] 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 is satisfied. For another example, the first configuration information is used by the terminal device to determine the first information.

[0119] In some implementations, the first configuration information is used to configure the first function. For example, the first function is P = f(win), indicating that the probability threshold of the radio link failure between the terminal device and the network device at a future win time is P, and the first configuration information includes the first function.

[0120] 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 satisfied. Accordingly, after receiving the first configuration information, the terminal device can determine the first function based on the first configuration information, and then determine the first information and / or determine whether the first condition is satisfied. For example, the prediction result indicates whether the radio link between the terminal device and the network device will fail in a first time period, and 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 the radio link failure predicted based on the model in the first time period is higher than the average value of the probability threshold of the radio link failure determined based on the first function configured by the network device in the first time period, the terminal device can determine the first information, which indicates that the radio link between the terminal device and the network device will fail in the first time period. For another example, the first function is P = f(win), indicating that the probability threshold of the radio link failure between the terminal device and the network device at a future win time is P, and the variable win of the first function takes a value including the first time period. The first condition includes that the average value of the probability of the radio link failure predicted based on the model in the first time period is higher than the average value of the probability threshold of the radio link failure determined based on the first function configured by the network device in the first time period. The terminal device determines the first function based on the received first configuration information, and then determines whether the first condition is satisfied. If the first condition is satisfied, the terminal device reports the first information.

[0121] In some implementations, the first configuration information is used to configure the first time period in the above. For example, the first time period is [T1, T2], and the first configuration information includes the first time period.

[0122] In some implementations, if the first configuration information is used to configure the first time period in the 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, after receiving the first configuration information, the terminal device 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 of the wireless link between the terminal device and the network device in the first time period, and after receiving the first configuration information, the terminal device 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 that the average of the probability of RLF of the wireless link predicted based on the model in the first time period is higher than the average of the probability threshold of RLF of 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 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 last received first configuration information). If the first condition is met, the terminal device reports the first information.

[0123] In some implementations, the first configuration information is used to configure the first probability threshold. For example, the first probability threshold is P_thresh, and the first configuration information includes the first probability threshold.

[0124] In some implementations, if the first configuration information is used to configure the 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, after receiving the first configuration information, the terminal device 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 of the wireless link determined by the terminal device based on the model is greater than P_thresh, and the prediction result indicates whether the wireless link between the terminal device and the network device will have RLF. 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 the wireless link between the terminal device and the network device will have RLF.

[0125] 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 in the above indicates whether the wireless link between the terminal device and the network device will experience the RLF in the first time period, the first probability threshold is P_thresh, and if the probability of the wireless link determined by the terminal device based on the model to experience the RLF in the first time period is greater than P_thresh, the first information can indicate that the wireless link between the terminal device and the network device will experience the RLF in the first time period. For another example, the first probability threshold is P_thresh, and the first condition includes that the probability of the wireless link determined by the terminal device based on the model to experience the RLF in 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 judges whether the first condition is met. If the first condition is met, the terminal device sends the first information.

[0126] In some implementations, the first configuration information is carried in an RRC message.

[0127] In some implementations, the RRC message described above can be an existing RRC message. For example, an existing RRCreconfiguration message carries the first configuration information.

[0128] In other implementations, the RRC message described above can be a newly defined RRC message. For example, a new AI associated information message carries the first configuration information.

[0129] In some implementations, the first configuration message does not need to be activated, that is to say, after the terminal device receives the first configuration information, the first configuration information takes effect immediately.

[0130] In other implementations, the first configuration message needs to be activated, that is to say, after the terminal device receives the first configuration information, the first configuration information does not take effect, and the first configuration information takes effect only after the terminal device receives the activation information corresponding to the first configuration information.

[0131] In some implementations, the activation information corresponding to the first configuration information is carried in a MAC CE or a downlink control information (DCI).

[0132] In some implementations, the first configuration information is sent by the network device after completing the configuration. For example, after the terminal device accesses a cell and completes the RRC session establishment, the network device completes the configuration, and then sends the first configuration information to the terminal device, so as to facilitate the terminal device to predict the RLF based on the model.

[0133] In some implementations, the first configuration information can also be used to configure one or more of the following: whether the terminal device clears the intermediate prediction result determined based on the model; whether the terminal device starts a new round of RLF prediction based on the model.

[0134] 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 in the last time. For example, after the terminal device receives the first configuration information sent by the network device, or the updated first configuration information, or the activation information corresponding to the first configuration information sent by the network device, the terminal device can determine whether to clear the intermediate prediction result determined based on the model in the last time based on the first configuration information.

[0135] 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, and whether the terminal device starts a new round of RLF prediction based on the model, which can be understood as the first configuration information being used to configure the terminal device to clear the original intermediate prediction result determined based on the model and start a new round of RLF prediction based on the model. For example, after the terminal device receives the first configuration information sent by the network device, or the updated first configuration information, or the activation information corresponding to the first configuration information sent by the network device, the terminal device determines to clear the original intermediate prediction result determined based on the model and start a new round of RLF prediction based on the model based on the first configuration information.

[0136] In some implementations, in response to the expiration of the first timer, if the first information is carried in a newly defined message, the terminal device sends an RRC reestablishment request to the network device. For example, referring to FIG. 10, the first timer is timer T310, the first information is carried in a newly defined RLF early warning information, and after the expiration of timer T310, the terminal device sends an RRC reestablishment request to the network device.

[0137] In some implementations, in response to the expiration of the first timer, 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 can send an RRC reestablishment request to the network device.

[0138] In some implementations, the RRC reestablishment request sent after the expiration of the first timer can indicate that the RLF has been predicted based on the model and / or the prediction result determined based on the model.

[0139] In some implementations, the RLF having been predicted based on the model can be understood as the prediction result determined based on the model indicating that the radio link between the terminal device and the network device will experience RLF.

[0140] In some implementations, the prediction result determined by the model can be understood as a specific prediction case determined by the model, or in other words, the prediction result determined by the model is the probability of the radio link between the terminal device and the network device experiencing RLF. For example, the prediction result determined by the model is the highest probability, the lowest probability, the average probability, etc. of the radio link between the terminal device and the network device experiencing RLF in the time period [T1, T2].

[0141] In some implementations, the RRC re-establishment request sent after the first timer expires can indicate that the reason for the RRC re-establishment is that the model predicts RLF. For example, referring to FIG. 10, the first timer is timer T310, the timer T310 expires, and the terminal device sends an RRC re-establishment request to the network, which indicates that the reason for the RRC re-establishment is that the model predicts RLF.

[0142] The above describes the related schemes of the first information and the first configuration information through Embodiment 1 and Embodiment 2 respectively. In order to facilitate understanding, the combined scheme of the first information and the first configuration information is introduced below in combination with FIG. 9 and FIG. 10. Among them, FIG. 9 takes the first information carried in the RRC re-establishment request as an example for introduction, and FIG. 10 takes the first information carried in the newly defined RLF early warning information as an example for introduction.

[0143] Referring to FIG. 9, it is assumed 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 the radio link experiencing RLF predicted by the model in the first time period is higher than the average value of the probability threshold of the radio link experiencing RLF determined by the first function configured by the network device in the first time period. After the terminal device completes the RRC session establishment, the network device sends the first configuration information to the terminal device. During the running of the timer T310, the terminal device predicts the probability of the radio link experiencing RLF based on the model, and if the average value of the probability in the first time period is greater than the average value of the probability threshold of the radio link experiencing RLF determined by the first function in the first time period, the terminal device determines that the first condition is met, that is, the terminal device sends an RRC re-establishment request to the network device, the RRC re-establishment request carries the first information, and indicates that the reason for the RRC re-establishment is that the model predicts RLF. The first information indicates the average probability of the radio link between the terminal device and the network device experiencing RLF in the first time period.

[0144] Referring to 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 proportion of the time length of the first time in the total time length of the first time period is higher than 80%. After the terminal device completes the RRC session establishment, the network device sends the first configuration information to the terminal device. During the running of the timer T310, the terminal device predicts the probability of the wireless link to cause the RLF based on the model, and if the probability of the wireless link to cause the RLF based on the model in the first time period is higher than the time length of the time period corresponding to the probability threshold of the wireless link to cause the RLF determined based on the first function (i.e., the first time), the proportion of the time length of the first time in the total time length of the first time period is higher than 80%, the terminal device determines that the first condition is met, i.e., the terminal device sends the RLF early warning information to the network device. The RLF early warning information carries the first information, and the first information indicates that the wireless link between the terminal device and the network device will cause the RLF in the first time period. If until the timer T310 expires, the terminal device does not receive the continuous N311 IS indications, the terminal device considers that the wireless link causes the RLF. Then, at the expiration of the timer T310, the terminal device sends the RRC re-establishment request to the network device, and indicates that the reason for the RRC re-establishment is the model predicted RLF.

[0145] Embodiment 3: Second timer

[0146] 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 the timer T310, and the second timer is the timer T312'. During the running of the timer T310, the terminal device sends the first information to the network device, and starts the timer T312' when sending the first information.

[0147] In some implementations, during the running of the second timer, the terminal device expects the network device to perform the operation for recovering the wireless link. For example, the second timer is the timer T312', and during the running of the timer T312', the terminal device expects the network device to perform the operation for improving the quality of the wireless link, and tries to avoid the wireless link from causing the RLF.

[0148] In some implementations, the operation for recovering the wireless link can be understood as the operation that enables the terminal device to detect the continuous N311 IS indications. For example, the network device increases the downlink signal power, so that the terminal device detects the continuous N311 IS indications, and then the terminal device considers that the wireless link is recovered.

[0149] In some implementations, if the physical layer failure indicated by the first information comprises a physical layer failure detected by the terminal device in the communication with the serving cell, the terminal device sends an RRC reestablishment request to the network device in response to the expiration of the second timer. For example, referring to FIG. 11, the second timer is timer T312', during the running of the timer T312', the terminal device expects the network device to perform an operation for recovering the radio link of the serving cell, if the terminal device does not receive consecutive N311 IS indications until the expiration of the timer T312', the terminal device considers that the radio link of the serving cell is not recovered. In response to the expiration of the timer T312', the terminal device sends an RRC reestablishment request to the network device to access other cells with better radio link quality to implement RRC session reestablishment.

[0150] In some implementations, the RRC reestablishment request sent by the terminal device in response to the expiration of the second timer can indicate that the RRC reestablishment reason is the model predicted RLF.

[0151] In some implementations, the RRC reestablishment request sent by the terminal device in response to the expiration of the second timer can carry the prediction result determined based on the model. For example, during the running 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 reestablishment request sent in response to the expiration of the second timer.

[0152] It should be noted that the prediction result determined based on the model has been explained above and will not be repeated here.

[0153] For ease of understanding, the following describes a combination scheme of the first information and the second timer with the example that the physical layer failure indicated by the first information comprises a physical layer failure detected by the terminal device in the communication with the serving cell, in combination with FIG. 11.

[0154] It is assumed that the physical layer failure indicated by the first information comprises a physical layer failure detected by the terminal device in the communication with the serving cell, the network device belongs to the network device to which the serving cell belongs, the first timer is timer T310, and the second timer is timer T312'.

[0155] In step S1110, the timer T310 starts running.

[0156] When the physical failure detected by the terminal device is that the high layer of the terminal device receives consecutive N310 OOS indications, the terminal device starts the timer T310.

[0157] In step S1120, the terminal device sends the first information to the network device.

[0158] During the running of the timer T310, the terminal device predicts the probability of RLF of the wireless link between the terminal device and the network device based on the model, and when the first condition is met, the terminal device sends first information to the network device through the RLF early warning information, and the first information indicates the probability of RLF of 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 a timer T312'. During the running of the 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, while the terminal device continues to determine the prediction result based on the model.

[0159] In step S1130, the terminal device sends an RRC re-establishment request to the network device.

[0160] If the terminal device does not receive consecutive N311 IS indications until the timer T310 expires, it is considered that the wireless link of the serving cell is not restored. In response to the expiration of the timer T312', 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.

[0161] In some implementations, if the physical layer failure includes a physical layer failure detected in the communication process of the terminal device with the SCG, in response to the expiration of the second timer, the terminal device sends an SCGFailureInformation to the network device, and / or indicates that the cause of the SCG failure is the expiration of the second timer. For example, referring to FIG. 12, the second timer is the timer T312', and during the running of the timer T312', the terminal device expects the network device to which the MCG belongs to perform an operation for restoring the wireless link of the SCG. If the terminal device does not receive consecutive N311 IS indications until the timer T310 expires, it is considered that the wireless link of the SCG is not restored. In response to the expiration of the timer T312', the terminal device sends an SCGFailureInformation message to the network device to which the MCG belongs, and indicates that the cause of the SCG failure is the expiration of T312'.

[0162] For ease of understanding, the following takes an example of the first information indicating a physical layer failure including a physical layer failure detected in the communication process of the terminal device with the SCG, and introduces a combination scheme of the first information and the second timer in combination with FIG. 12.

[0163] It is assumed that the first information indicates a physical layer failure including a physical layer failure detected in the communication process of the terminal device with the SCG, the first timer is the timer T310, and the second timer is the timer T312'.

[0164] In step S1210, the timer T310 starts running.

[0165] When the physical failure detected by the terminal device is that the terminal device receives consecutive N310 OOS indications at a high layer of the terminal device, the terminal device starts a timer T310.

[0166] In step S1220, the terminal device sends first information to the MCG.

[0167] During running of the timer T310, the terminal device predicts a probability of occurrence of RLF of a wireless link between the terminal device and a network device to which the SCG belongs based on the model, and when a first condition is met, the terminal device sends first information to the network device to which the MCG belongs through RLF early warning information, the first information indicating the probability of occurrence of RLF of the wireless link between the terminal device and the network device to which the SCG belongs. In response to sending of the first information by the terminal device, the terminal device starts a timer T312'. During running of the 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.

[0168] In step S1230, the terminal device sends SCGFailureInformation to the MCG.

[0169] If until the timer T310 expires, the terminal device does not receive consecutive N311 IS indications, it is considered that the wireless link of the SCG is not recovered. In response to expiration of the timer T312', the terminal device sends SCGFailureInformation to the network device to which the MCG belongs, and indicates that the reason for the SCG failure is expiration of the T312'.

[0170] In some implementations, if the physical layer failure includes a physical layer failure detected in the process of communication of the terminal device with the MCG, in response to expiration of a second timer, the terminal device sends MCGFailureInformation to the network device, and / or indicates that the reason for the MCG failure is expiration of the second timer. For example, referring to FIG. 13, the second timer is the timer T312', during running of the timer T312', the terminal device expects the network device to which the SCG belongs to perform an operation for recovering the wireless link of the MCG. If until the timer T310 expires, the terminal device does not receive consecutive N311 IS indications, it is considered that the wireless link of the MCG is not recovered. In response to expiration of the timer T312', the terminal device sends MCGFailureInformation to the network device to which the SCG belongs, and indicates that the reason for the MCG failure is expiration of the T312'.

[0171] In some implementations, in response to the expiration of the second timer, the terminal device starts a third timer. For example, referring to FIG. 13, the first timer is timer T312', and the third timer is timer T316. Upon expiration of timer T312', the terminal device starts timer T316.

[0172] In some implementations, during running of the third timer, the terminal device expects the network device to perform an operation for resuming the radio link of the MCG.

[0173] In some implementations, the network device performing the operation for resuming the radio link of the MCG can be a network device to which the MCG belongs. For example, an access network device to which the MCG belongs.

[0174] In some other implementations, the network device performing the operation for resuming the radio link of the MCG can be a network device to which the SCG belongs. For example, an access network device to which the SCG belongs.

[0175] In some implementations, if the third timer expires, the radio link between the terminal device and the MCG is not resumed, and the prediction result determined based on the model indicates that the radio link between the terminal device and the MCG will experience RLF, the terminal device sends an RRC reestablishment request to the MCG. For example, referring to FIG. 13, the second timer is timer T312', and the third timer is timer T316. During running of timer T312', the terminal device expects the network device to which the SCG belongs to perform an operation for resuming the radio link of the MCG. If until expiration of timer T312', the terminal device does not receive consecutive N311 IS indications, it is considered that the radio link of the MCG is not resumed. In response to expiration of timer T312', the terminal device starts timer T316. During running of timer T316, the terminal device expects the network device to perform an operation for resuming the radio link of the MCG. If until expiration of timer T316, the terminal device does not receive consecutive N311 IS indications, it is considered that the radio link of the MCG is not resumed. In response to expiration of timer T316, if the prediction result determined based on the model indicates that the radio link between the terminal device and the MCG will experience RLF, the terminal device sends an RRC reestablishment request to the network device to which the MCG belongs, and indicates that the reestablishment reason is that the model predicts RLF.

[0176] In some implementations, the RRC reestablishment request carries the prediction result determined based on the model, and / or indicates that the reestablishment reason is that the model predicts RLF.

[0177] It should be noted that the prediction result determined based on the model has been explained above, and will not be repeated here.

[0178] For ease of understanding, the following takes the example of the physical layer failure indicated by the first information including the physical layer failure detected in the process of the terminal device communicating with the MCG, and introduces the combination scheme of the first information, the second timer and the third timer in combination with FIG. 13.

[0179] It is assumed that the physical layer failure indicated by the first information includes the physical layer failure detected in the process of the terminal device communicating with the MCG, the first timer is timer T310, the second timer is timer T312', and the third timer is timer T316.

[0180] In step S1310, the timer T310 starts running.

[0181] When the physical failure detected by the terminal device is that the high layer of the terminal device receives continuous N310 OOS indications, the terminal device starts the timer T310.

[0182] In step S1320, the terminal device sends the first information to the SCG.

[0183] During the running of the timer T310, the terminal device predicts the probability of RLF occurring between the terminal device and the network device to which the MCG belongs based on the model, and sends the first information to the network device to which the SCG belongs through the RLF early warning information, the first information indicating the probability of RLF occurring between the terminal device and the network device to which the MCG belongs. In response to the terminal device sending the first information, the terminal device starts the timer T312'. During the running of the timer T312', the terminal device expects the network device to which the SCG belongs to perform an operation for recovering the wireless link between the terminal device and the network device to which the MCG belongs.

[0184] In step S1330, the terminal device reports the measurement report to the network device.

[0185] The terminal device performs layer 3 measurement according to the network device configuration, and if the measurement reporting condition configured by the network device is met, the terminal device starts the timer TTT. If the result of the layer 3 measurement always meets the measurement reporting condition during the running of the timer TTT, the terminal device reports the measurement report to the network device when the timer TTT times out, and starts the timer T312.

[0186] In step S1340, the terminal device sends the MCGFailureInformation to the SCG.

[0187] If the terminal device does not receive consecutive N311 IS indications until the timer T312' expires, it is considered that the radio link of the MCG is not recovered. In response to the expiration of the timer T312', 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 expiration of the timer T312', the terminal device starts the timer T316. During the running of the timer T316, the terminal device expects the network device to perform an operation for recovering the radio link of the MCG.

[0188] In step S1340, the terminal device sends an RRC re-establishment request to the MCG.

[0189] If the terminal device does not receive consecutive N311 IS indications until the timer T316 expires, it is considered that the radio link of the MCG is not recovered. In response to the expiration of the timer T316, 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 model predicted RLF.

[0190] 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. For example, referring to FIG. 13, the second timer is T312', the fifth timer is the timer T312, the terminal device sends the first information, and starts the timer T312', the timer T312' is started during the running of the timer TTT, and during the running of the timer T312', the terminal device expects the network device to perform an operation for improving the quality of the radio link, so there is no need to start the timer T312 when the TTT expires.

[0191] The method embodiments of the present application are described in detail above in combination with FIGS. 1 to 13, and the device embodiments of the present application are described in detail below in combination with FIGS. 14 to 16. It should be understood that the description of the method embodiments corresponds to the description of the device embodiments, and therefore, the parts not described in detail can be referred to the foregoing method embodiments.

[0192] FIG. 14 is a schematic diagram of a terminal device according to an embodiment of the present application. The terminal device 1400 shown in FIG. 14 includes a sending unit 1410.

[0193] The sending unit 1410 is configured to send first information to a network device during the running of a first timer, the first information being used to indicate a prediction result of a radio link failure RLF between the terminal device and the network device determined based on a model; and the first timer is triggered based on a physical layer failure detected by the terminal device.

[0194] In some embodiments, the physical layer failure comprises one of: a physical layer failure detected in a process of the terminal device communicating with a serving cell; a physical layer failure detected in a process of the terminal device communicating with a secondary cell group (SCG); and a physical layer failure detected in a process of the terminal device communicating with a master cell group (MCG).

[0195] In some embodiments, if the physical layer failure comprises the physical layer failure detected in the process of the terminal device communicating with the serving cell, the network device belongs to network devices to which the serving cell belongs.

[0196] In some embodiments, if the physical layer failure comprises the physical layer failure detected in the process of the terminal device communicating with the SCG, the network device belongs to the MCG.

[0197] In some embodiments, if the physical layer failure comprises the physical layer failure detected in the process of the terminal device communicating with the MCG, the network device belongs to the SCG.

[0198] In some embodiments, the terminal device further comprises: a processing unit, which is configured to start a second timer in response to the terminal device sending the first information.

[0199] In some embodiments, the terminal device further comprises: during running of the second timer, the terminal device expects the network device to perform an operation for recovering a wireless link.

[0200] In some embodiments, if the physical layer failure comprises the physical layer failure detected in the process of the terminal device communicating with the serving cell, the terminal device further comprises: in response to the second timer expiring, the sending unit 1410 is further configured to send a radio resource control (RRC) re-establishment request to the network device.

[0201] In some embodiments, if the physical layer failure comprises the physical layer failure detected in the process of the terminal device communicating with the SCG, the terminal device further comprises: in response to the second timer expiring, the sending unit 1410 is further configured to send an SCGFailureInformation to the network device, and / or indicate that a cause of the SCG failure is the second timer expiring.

[0202] In some embodiments, if the physical layer failure comprises the physical layer failure detected in the process of the terminal device communicating with the MCG, the terminal device further comprises: in response to the second timer expiring, the sending unit 1410 is further configured to send an MCGFailureInformation to the network device, and / or indicate that a cause of the MCG failure is the second timer expiring.

[0203] In some embodiments, the terminal device further includes a processing unit, which is configured to start a third timer in response to the second timer expiring.

[0204] In some embodiments, the terminal device further includes a sending unit 1410, which is configured to send, to the MCG, a RRC reestablishment request if the third timer expires, the radio link between the terminal device and the MCG is not recovered, and the prediction result determined based on the model indicates that the radio link between the terminal device and the MCG will experience the RLF.

[0205] In some embodiments, the RRC reestablishment request carries the prediction result determined based on the model.

[0206] In some embodiments, the prediction result is used to indicate one or more of: a probability that the radio link between the terminal device and the network device will experience the RLF; whether the radio link between the terminal device and the network device will experience the RLF.

[0207] In some embodiments, the terminal device sends the first information to the network device includes: the terminal device sends the first information to the network device when a first condition is met.

[0208] In some embodiments, the terminal device sends the first information to the network device includes: the terminal device sends the first information to the network device in response to a fourth timer expiring and a prediction result determined based on the model during running of the fourth timer meeting a first condition.

[0209] In some embodiments, the starting of the fourth timer is triggered based on the first condition.

[0210] In some embodiments, the first condition includes one or more of: an average of probabilities of the radio link experiencing the RLF predicted based on the model in a first time period being higher than an average of probability thresholds of the radio link experiencing the RLF determined based on the first function configured by the network device in the first time period; a first probability of the radio link experiencing the RLF predicted based on the model in the first time period being higher than a probability threshold of the radio link experiencing the RLF determined based on the first function in the first time period; a proportion of a first time in a total time of the first time period being higher than a threshold, the first time being a time period corresponding to a probability of the radio link experiencing the RLF predicted based on the model being higher than the probability threshold of the radio link experiencing the RLF determined based on the first function in the first time period.

[0211] In some embodiments, before the terminal device sends the first information to the network device, the terminal device further comprises a receiving unit configured to receive first configuration information sent by the network device, wherein the first configuration information is used to configure the terminal device to determine a prediction result of occurrence of RLF of the wireless link based on a model.

[0212] In some embodiments, the first configuration information is used to configure a first function, wherein the first function is used to determine a probability threshold of occurrence of RLF of the wireless link in a first time period.

[0213] FIG. 15 is a schematic diagram of a terminal device according to an embodiment of the present application. The terminal device 1500 shown in FIG. 15 comprises a receiving unit 1510.

[0214] The receiving unit 1510 is configured to receive first information sent by the terminal device during running of a first timer, wherein the first information is used to indicate a prediction result of occurrence of RLF of the wireless link between the terminal device and the network device determined based on a model; and wherein the first timer is triggered based on a physical layer failure detected by the terminal device.

[0215] In some embodiments, the physical layer failure comprises one of the following: a physical layer failure detected by the terminal device during communication with a serving cell; a physical layer failure detected by the terminal device during communication with a secondary cell group (SCG); and a physical layer failure detected by the terminal device during communication with a master cell group (MCG).

[0216] In some embodiments, if the physical layer failure comprises a physical layer failure detected by the terminal device during communication with a serving cell, the network device belongs to network devices belonging to the serving cell.

[0217] In some embodiments, if the physical layer failure comprises a physical layer failure detected by the terminal device during communication with an SCG, the network device belongs to an MCG.

[0218] In some embodiments, if the physical layer failure comprises a physical layer failure detected by the terminal device during communication with an MCG, the network device belongs to an SCG.

[0219] In some embodiments, the network device further comprises that during running of a second timer, the network device is expected to perform an operation for recovering the wireless link by the terminal device; and wherein the second timer is triggered based on sending of the first information by the terminal device.

[0220] In some embodiments, if the physical layer failure comprises a physical layer failure detected in the communication between the terminal device and the serving cell, the network device further comprises: after the second timer expires, the receiving unit 1510 is further configured to receive a radio resource control (RRC) re-establishment request sent by the terminal device.

[0221] In some embodiments, if the physical layer failure comprises a physical layer failure detected in the communication between the terminal device and the SCG, the network device further comprises: after the second timer expires, the receiving unit 1510 is further configured to receive SCGFailureInformation sent by the terminal device, and / or an indication that the cause of the SCG failure is the expiration of the second timer.

[0222] In some embodiments, if the physical layer failure comprises a physical layer failure detected in the communication between the terminal device and the MCG, the network device further comprises: after the second timer expires, the receiving unit 1510 is further configured to receive MCGFailureInformation sent by the terminal device, and / or an indication that the cause of the MCG failure is the expiration of the second timer.

[0223] In some embodiments, the network device further comprises: if a third timer expires, the wireless link between the terminal device and the MCG is not restored, and the prediction result determined based on the model indicates that the wireless link between the terminal device and the MCG will experience RLF, the network device to which the MCG belongs receives an 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.

[0224] In some embodiments, the RRC re-establishment request carries the prediction result determined based on the model.

[0225] In some embodiments, the prediction result is used to indicate one or more of: the probability that the wireless link between the terminal device and the network device will experience RLF; whether the wireless link between the terminal device and the network device will experience RLF.

[0226] In some embodiments, the terminal device receives first information sent by the network device, comprising: the network device receives the first information sent by the terminal device when a first condition is met.

[0227] In some embodiments, the terminal device sends first information to the network device, comprising: after a fourth timer expires, and during the running of the fourth timer, the network device receives the first information sent by the terminal device when a prediction result determined based on the model meets a first condition.

[0228] In some implementations, the starting of the fourth timer is triggered based on the first condition.

[0229] In some implementations, the first condition comprises one or more of: an average of probabilities of RLF of the wireless link predicted based on the model within a first time period, being higher than an average of probability thresholds of RLF of the wireless link determined based on the first function configured by the network device within the first time period; a first probability of RLF of the wireless link predicted based on the model within the first time period, being higher than a probability threshold of RLF of the wireless link determined based on the first function within the first time period; a proportion of a time length of a first time in a total time length of the first time period, the first time being a time period corresponding to a probability of RLF of the wireless link predicted based on the model being higher than a probability threshold of RLF of the wireless link determined based on the first function within the first time period, being higher than a threshold.

[0230] In some implementations, before the network device receives the first information sent by the terminal device, the network device further comprises: a sending unit configured to send first configuration information to the terminal device, the first configuration information being used to configure the terminal device to determine a prediction result of RLF of the wireless link based on a model.

[0231] In some implementations, the first configuration information is used to configure a first function, the first function being used to determine a probability threshold of RLF of the wireless link within a first time period.

[0232] In optional embodiments, the sending unit 1410 can be a transceiver 1630. The terminal device 1400 can further comprise a processor 1610 and a memory 1620, as shown in FIG. 16.

[0233] In optional embodiments, the receiving unit 1510 can be a transceiver 1630. The network device 1500 can further comprise a processor 1610 and a memory 1620, as shown in FIG. 16.

[0234] FIG. 16 is a schematic structural diagram of a communication apparatus according to an embodiment of the present application. The dashed line in FIG. 16 indicates that the unit or module is optional. The apparatus 1600 can be used to implement the method described in the above method embodiments. The apparatus 1600 can be a chip, a terminal device or a network device.

[0235] The apparatus 1600 can include one or more processors 1610. The processor 1610 can support the apparatus 1600 to implement the methods described in the foregoing method embodiments. The processor 1610 can be a general processor or a special-purpose processor. For example, the processor can be a central processing unit (CPU). Alternatively, the processor can also be other general processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs) or other programmable logic devices, discrete gates or transistor logic, discrete hardware components, etc. The general processor can be a microprocessor or the processor can also be any conventional processor.

[0236] The apparatus 1600 can 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 performs the methods described in the foregoing method embodiments. The memory 1620 can be independent of the processor 1610 or integrated in the processor 1610.

[0237] The apparatus 1600 can further include a transceiver 1630. The processor 1610 can communicate with other devices or chips through the transceiver 1630. For example, the processor 1610 can perform data transceiving with other devices or chips through the transceiver 1630.

[0238] Embodiments of the present application further provide a computer readable storage medium for storing a program. The computer readable storage medium can be applied in the terminal or network device provided by the embodiments of the present application, and the program causes the computer to execute the method performed by the terminal or network device in the various embodiments of the present application.

[0239] Embodiments of the present application further provide a computer program product. The computer program product includes a program. The computer program product can be applied in the terminal or network device provided by the embodiments of the present application, and the program causes the computer to execute the method performed by the terminal or network device in the various embodiments of the present application.

[0240] Embodiments of the present application further provide a computer program. The computer program can be applied in the terminal or network device provided by the embodiments of the present application, and the computer program causes the computer to execute the method performed by the terminal or network device in the various embodiments of the present application.

[0241] It should be understood that the terms "system" and "network" can be used interchangeably in this application. In addition, the terms used in this application are only used to explain the specific embodiments of the application, and are not intended to limit the application. The terms "first", "second", "third", and "fourth" and the like in the specification and claims of the application and the drawings are used to distinguish different objects, and are not used to describe a particular order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0242] In embodiments of the present application, the term "indicate" can be direct indication or indirect indication, or can represent an associated relationship. For example, A indicates B, which can mean that B can be obtained by A; or A indirectly indicates B, for example, A indicates C, and B can be obtained by C; or A and B have an associated relationship.

[0243] In embodiments 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 also be understood that determining B according to A does not mean that B is determined only according to A, but B can also be determined according to A and / or other information.

[0244] In embodiments of the present application, the term "corresponding" can represent a direct or indirect corresponding relationship between the two, or can represent an associated relationship between the two, or can represent an indication and being indicated, configuration and being configured, and the like.

[0245] In embodiments of the present application, "predefined" or "preconfigured" can be achieved by pre-saving corresponding codes, tables or other information that can be used to indicate related information in devices (such as terminal devices and network devices), and the specific implementation of the present application is not limited. For example, predefinition can refer to definition in a protocol.

[0246] In embodiments of the present application, the "protocol" can refer to a standard protocol in the communication field, which can include LTE protocol, NR protocol and related protocols applied to future communication systems, and the present application is not limited.

[0247] In embodiments of the present application, the term "and / or" is only used to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in this paper generally represents an "or" relationship between the front and rear associated objects.

[0248] In various embodiments of the present application, the size of the serial number of the above processes does not mean the order of execution, and the execution order of the processes should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0249] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other manners. For example, the division of the above-described device embodiments is only a logical function division, and there can be another division manner for actual implementation, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections between different units, or between the different components, can be indirect couplings or communication connections through some interfaces, devices or units, and can be in electrical, mechanical or other forms.

[0250] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e., can be located in one place, or can be distributed on multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiments.

[0251] In addition, each functional unit in each embodiment of the present application can be integrated into a processing unit, or each unit can exist physically, or two or more units can be integrated into one unit.

[0252] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments can be implemented 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, all or part of the processes or functions described in the embodiments of the present application are generated. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices. The computer instructions can 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 can be transmitted from one website, computer, server or data center to another website, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) mode. The computer readable storage medium can be any available medium that can be read by a computer or a data storage device such as a server, data center and the like integrated with one or more available media sets. The available media can be magnetic media (for example, floppy disk, hard disk, magnetic tape), optical media (for example, digital video disc (DVD)) or semiconductor media (for example, solid state disk (SSD)) and the like.

[0253] 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 can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method of wireless communication, comprising: Comprise: During running of the first timer, the terminal device sends first information to the network device, the first information is used to indicate a prediction result of radio link failure (RLF) of 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 failure detected by the terminal device.

2. The method of claim 1, wherein, The physical layer failure comprises one of: A physical layer failure detected by the terminal device in a communication process with a serving cell; A physical layer failure detected by the terminal device in a communication process with a secondary cell group (SCG); A physical layer failure detected by the terminal device in a communication process with a master cell group (MCG).

3. The method of claim 2, wherein, If the physical layer failure comprises a physical layer failure detected by the terminal device in a communication process with a serving cell, the network device belongs to network devices belonging to the serving cell.

4. The method of claim 2, wherein, If the physical layer failure comprises a physical layer failure detected by the terminal device in a communication process with an SCG, the network device belongs to an MCG.

5. The method of claim 2, wherein, If the physical layer failure comprises a physical layer failure detected by the terminal device in a communication process with an MCG, the network device belongs to an SCG.

6. The method of any one of claims 1-5, wherein, The method further comprises: In response to the terminal device sending the first information, the terminal device starts a second timer.

7. The method of claim 6, wherein, The method further comprises: During running of the second timer, the terminal device expects the network device to perform an operation for recovering the wireless link.

8. The method of any one of claims 1-7, wherein, If the physical layer failure comprises a physical layer failure detected by the terminal device in a communication process with a serving cell, the method further comprises: In response to the second timer expiring, the terminal device sends a radio resource control (RRC) re-establishment request to the network device.

9. The method of any one of claims 1-7, wherein, If the physical layer failure comprises a physical layer failure detected by the terminal device in a communication process with an SCG, the method further comprises: In response to the second timer expiring, the terminal device sends SCGFailureInformation to the network device, and / or indicates that the cause of the SCG failure is the expiration of the second timer.

10. The method of any one of claims 1-7, wherein, If the physical layer failure comprises a physical layer failure detected by the terminal device in a communication process with an MCG, the method further comprises: In response to the second timer expiring, the terminal device sends MCGFailureInformation to the network device, and / or indicates that the cause of the MCG failure is the expiration of the second timer.

11. The method of claim 10, wherein, The method further comprises: In response to the second timer expiring, the terminal device starts a third timer.

12. The method of claim 11, wherein, The method further comprises: If the third timer expires, the wireless link between the terminal device and the MCG is not recovered, and the prediction result determined based on the model indicates that the wireless link between the terminal device and the MCG will experience RLF, the terminal device sends an RRC re-establishment request to the MCG.

13. The method of claim 8 or 12, wherein, The RRC re-establishment request carries the prediction result determined based on the model.

14. The method of any one of claims 1-13, wherein, The prediction result is used to indicate one or more of: A probability of the wireless link between the terminal device and the network device experiencing RLF; whether the wireless link between the terminal device and the network device will experience the RLF.

15. The method of any one of claims 1-14, wherein, The terminal device sends first information to the network device, including: The terminal device sends the first information to the network device in response to the first condition being met.

16. The method of any one of claims 1-14, wherein, The terminal device sends first information to the network device, including: The terminal device sends the first information to the network device in response to the fourth timer expiring and the prediction result determined based on the model during the running of the fourth timer meeting the first condition.

17. The method of claim 16, wherein, The starting of the fourth timer is triggered based on the first condition.

18. The method of any one of claims 15-17, wherein, The first condition includes one or more of: The average of the probabilities of the wireless link experiencing the RLF predicted based on the model within the first time period is higher than the average of the probability thresholds of the wireless link experiencing the RLF determined based on the first function within the first time period; The average of the probability thresholds of the wireless link experiencing the RLF determined based on the first function configured by the network device; The first probability of the wireless link experiencing the RLF predicted based on the model within the first time period is higher than the probability threshold of the wireless link experiencing the RLF 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 a threshold, the first time being a time period corresponding to the probability of the wireless link experiencing the RLF predicted based on the model being higher than the probability threshold of the wireless link experiencing the RLF determined based on the first function within the first time period.

19. The method of any one of claims 1-18, wherein, 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, the first configuration information being used to configure the terminal device to determine the prediction result of the wireless link experiencing the RLF based on the model.

20. The method of claim 19, wherein, The first configuration information is used to configure a first function used to determine a probability threshold of the wireless link experiencing the RLF within a first time period.

21. A method of wireless communication, comprising: includes: During the running of a first timer, the network device receives first information sent by the terminal device, the first information being used to indicate a prediction result of the wireless link between the terminal device and the network device experiencing a radio link failure (RLF) 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, wherein, The physical layer failure includes one of: A physical layer failure detected by the terminal device during communication with a serving cell; A physical layer failure detected by the terminal device during communication with a secondary cell group (SCG); A physical layer failure detected by the terminal device during communication with a master cell group (MCG).

23. The method of claim 22, wherein, If the physical layer failure includes a physical layer failure detected by the terminal device during communication with a serving cell, the network device belongs to network devices belonging to the serving cell.

24. The method of claim 22, wherein, If the physical layer failure includes a physical layer failure detected by the terminal device during communication with an SCG, the network device belongs to an MCG.

25. The method of claim 22, wherein, If the physical layer failure includes a physical layer failure detected by the terminal device during communication with an MCG, the network device belongs to an SCG.

26. The method of any one of claims 21-25, wherein, The method further includes: During 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 of any one of claims 21-26, wherein, If the physical layer failure comprises a physical layer failure detected in a process of the terminal device communicating with the serving cell, the method further comprises: After the second timer expires, the network device receives a radio resource control (RRC) reestablishment request sent by the terminal device.

28. The method of any one of claims 21-26, wherein, If the physical layer failure comprises a physical layer failure detected in a process of the terminal device communicating with the SCG, the method further comprises: After the second timer expires, the network device receives SCGFailureInformation sent by the terminal device, and / or an indicated cause of the SCG failure is that the second timer expires.

29. The method of any one of claims 21-26, wherein, If the physical layer failure comprises a physical layer failure detected in a process of the terminal device communicating with the MCG, the method further comprises: After the second timer expires, the network device receives MCGFailureInformation sent by the terminal device, and / or an indicated cause of the MCG failure is that the second timer expires.

30. The method of claim 29, wherein, The method further comprises: If a third timer expires, a wireless link between the terminal device and the MCG is not recovered, and a prediction result determined based on the model indicates that the wireless link between the terminal device and the MCG will experience RLF, a network device to which the MCG belongs receives an RRC reestablishment request sent by the terminal device. The third timer is triggered by the terminal device based on the second timer expiring.

31. The method of claim 27 or 30, wherein, The RRC reestablishment request carries the prediction result determined based on the model.

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

33. The method of any one of claims 21-31, wherein, The terminal device receives first information sent by the network device, comprising: The network device receives the first information sent by the terminal device when a first condition is met.

34. The method of any one of claims 21-31, wherein, The terminal device sends first information to the network device, comprising: After a fourth timer expires, and when a prediction result determined based on the model during running of the fourth timer meets a first condition, the network device receives the first information sent by the terminal device.

35. The method of claim 34, wherein, Starting of the fourth timer is triggered based on the first condition.

36. The method of any one of claims 33-35, wherein, The first condition comprises one or more of the following: An average of a probability that the wireless link will experience RLF predicted based on the model in a first time period is higher than an average of a probability threshold that the wireless link will experience RLF determined based on the first function configured by the network device in the first time period; A first probability that the wireless link will experience RLF predicted based on the model in the first time period is higher than a probability threshold that the wireless link will experience RLF determined based on the first function in the first time period; A first time has a proportion of a total duration of the first time period that is higher than a threshold, the first time being a time period in which a probability of the wireless link experiencing the RLF is higher than a probability threshold of the wireless link experiencing the RLF determined based on the first function.

37. The method of any one of claims 21-36, wherein, 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, and the first configuration information is used to configure the terminal device to determine a prediction result of the wireless link experiencing the RLF based on a model.

38. The method of claim 37, wherein, The first configuration information is used to configure a first function used to determine a probability threshold of the wireless link experiencing the RLF in a first time period.

39. A terminal device, comprising: Comprise: The sending unit is configured to send first information to the network device during running of the first timer, and the first information is used to indicate a prediction result of the terminal device and the network device determining the wireless link experiencing the RLF based on a model. The first timer is triggered based on a physical layer failure detected by the terminal device.

40. The terminal device of claim 39, wherein, The physical layer failure comprises one of: A physical layer failure detected by the terminal device during communication with a serving cell; A physical layer failure detected by the terminal device during communication with a secondary cell group (SCG); A physical layer failure detected by the terminal device during communication with a master cell group (MCG).

41. The terminal device of claim 40, wherein, If the physical layer failure comprises a physical layer failure detected by the terminal device during communication with a serving cell, the network device belongs to network devices belonging to the serving cell.

42. The terminal device of claim 40, wherein, If the physical layer failure comprises a physical layer failure detected by the terminal device during communication with an SCG, the network device belongs to an MCG.

43. The terminal device of claim 40, wherein, If the physical layer failure comprises a physical layer failure detected by the terminal device during communication with an MCG, the network device belongs to an SCG.

44. The terminal device of any one of claims 39-43, wherein, The terminal device further comprises: The processing unit is configured to start a second timer in response to the terminal device sending the first information.

45. The terminal device of claim 44, wherein, The terminal device further comprises: During running of the second timer, the terminal device expects the network device to perform an operation for recovering the wireless link.

46. The terminal device of any one of claims 39-45, wherein, If the physical layer failure comprises a physical layer failure detected by the terminal device during communication with a serving cell, the terminal device further comprises: In response to the second timer expiring, the sending unit is further configured to send a radio resource control (RRC) re-establishment request to the network device.

47. The terminal device of any one of claims 39-45, wherein, If the physical layer failure comprises a physical layer failure detected by the terminal device during communication with an SCG, the terminal device further comprises: In response to the second timer expiring, the sending unit is further configured to send SCGFailureInformation to the network device and / or indicate that a cause of SCG failure is the second timer expiring.

48. The terminal device of any one of claims 39-45, wherein, If the physical layer failure comprises a physical layer failure detected by the terminal device during communication with an MCG, the terminal device further comprises: In response to the second timer expiring, the sending unit is further configured to send, to the network device, MCGFailureInformation and / or indicate a cause of MCG failure as the second timer expiring.

49. The terminal device of claim 48, wherein, The terminal device further includes: In response to the second timer expiring, the processing unit is configured to start a third timer.

50. The terminal device of claim 49, wherein, The terminal device further includes: If the third timer expires, the wireless link between the terminal device and the MCG is not recovered, and a prediction result determined based on the model indicates that the wireless link between the terminal device and the MCG will experience RLF, the sending unit is further configured to send, to the MCG, an RRC reestablishment request.

51. The terminal device according to claim 46 or 50, characterized by The RRC reestablishment request carries the prediction result determined based on the model.

52. The terminal device of any one of claims 39-51, wherein, The prediction result is used to indicate one or more of: A probability that the wireless link between the terminal device and the network device will experience RLF; Whether the wireless link between the terminal device and the network device will experience RLF.

53. The terminal device of any one of claims 39-52, wherein, The terminal device sends, to the network device, first information, including: If a first condition is met, the terminal device sends the first information to the network device.

54. The terminal device of any one of claims 39-52, wherein, The terminal device sends, to the network device, first information, including: In response to a fourth timer expiring, and based on a prediction result determined by the model meeting a first condition during running of the fourth timer, the terminal device sends the first information to the network device.

55. The terminal device according to claim 54, characterized by Starting of the fourth timer is triggered based on the first condition.

56. The terminal device of any one of claims 53-55, wherein, The first condition includes one or more of: An average of probabilities that the wireless link will experience RLF predicted by the model within a first time period is higher than an average of probability thresholds that the wireless link will experience RLF determined by the first function configured by the network device within the first time period; A first probability that the wireless link will experience RLF predicted by the model within the first time period is higher than a probability threshold that the wireless link will experience RLF determined by the first function within the first time period; A proportion of a length of a first time in a total length of the first time period is higher than a threshold, the first time being a time period corresponding to a time when a probability that the wireless link will experience RLF predicted by the model within the first time period is higher than a probability threshold that the wireless link will experience RLF determined by the first function.

57. The terminal device of any one of claims 39-56, wherein, Before the terminal device sends the first information to the network device, the terminal device further includes: A receiving unit configured to receive first configuration information sent by the network device, the first configuration information being used to configure the terminal device to determine a prediction result of the wireless link experiencing RLF based on the model.

58. The terminal device of claim 57, wherein, The first configuration information is used to configure a first function used to determine a probability threshold that the wireless link will experience RLF within a first time period.

59. A network device, comprising: The receiving unit is configured to receive, during running of a first timer, first information sent by a terminal device, the first information being used to indicate a prediction result determined by the terminal device based on a model that the wireless link between the terminal device and the network device will experience radio link failure (RLF); ​ The first timer is triggered based on a physical layer failure detected by the terminal device.

60. The network device of claim 59, wherein, The physical layer failure includes one of the following: The physical layer failure detected by the terminal device in the process of communicating with a serving cell; The physical layer failure detected by the terminal device in the process of communicating with a secondary cell group (SCG); The physical layer failure detected by the terminal device in the process of communicating with a master cell group (MCG).

61. The network device of claim 60, wherein, If the physical layer failure includes the physical layer failure detected by the terminal device in the process of communicating with the serving cell, the network device belongs to a network device to which the serving cell belongs.

62. The network device of claim 60, wherein, If the physical layer failure includes the physical layer failure detected by the terminal device in the process of communicating with the SCG, the network device belongs to a master cell group (MCG).

63. The network device of claim 60, wherein, If the physical layer failure includes the physical layer failure detected by the terminal device in the process of communicating with the MCG, the network device belongs to a secondary cell group (SCG).

64. The network device of any of claims 59-63, wherein, The network device further includes: During running of a second timer, the network device is expected by the terminal device to perform an operation for recovering a wireless link; The second timer is triggered based on the terminal device sending the first information.

65. The network device of any of claims 59-64, wherein, If the physical layer failure includes the physical layer failure detected by the terminal device in the process of communicating with the serving cell, the network device further includes: After the second timer expires, the receiving unit is further configured to receive a radio resource control (RRC) re-establishment request sent by the terminal device.

66. The network device of any of claims 59-64, wherein, If the physical layer failure includes the physical layer failure detected by the terminal device in the process of communicating with the SCG, the network device further includes: After the second timer expires, the receiving unit is further configured to receive SCGFailureInformation sent by the terminal device, and / or indicate that a cause of SCG failure is that the second timer expires.

67. The network device of any of claims 59-64, wherein, If the physical layer failure includes the physical layer failure detected by the terminal device in the process of communicating with the MCG, the network device further includes: After the second timer expires, the receiving unit is further configured to receive MCGFailureInformation sent by the terminal device, and / or indicate that a cause of MCG failure is that the second timer expires.

68. The network device of claim 67, wherein, The network device further includes: If a third timer expires, a wireless link between the terminal device and the MCG is not recovered, and a prediction result determined based on a model indicates that the wireless link between the terminal device and the MCG will have a radio link failure (RLF), a network device to which the MCG belongs receives an RRC re-establishment request sent by the terminal device. The third timer is triggered by the terminal device based on the second timer expiring.

69. The network device of claim 65 or 68, wherein, The RRC re-establishment request carries the prediction result determined based on the model.

70. The network device of any of claims 59-69, wherein, The prediction result is used to indicate one or more of the following: A probability that the wireless link between the terminal device and the network device has an RLF; Whether the wireless link between the terminal device and the network device will have an RLF.

71. The network device of any of claims 59-69, wherein, The terminal device receives first information sent by the network device, including: The network device receives the first information sent by the terminal device when a first condition is met.

72. The network device of any of claims 59-69, wherein, The terminal device sends first information to the network device, including: After the fourth timer expires, and the predicted result determined based on the model during the running of the fourth timer meets a first condition, the network device receives the first information sent by the terminal device.

73. The network device of claim 72, wherein, The starting of the fourth timer is triggered based on the first condition.

74. The network device of any of claims 71-73, wherein, The first condition includes one or more of: An average value of a probability of the wireless link experiencing RLF predicted based on the model in a first time period is higher than an average value of a probability threshold of the wireless link experiencing RLF determined based on the first function configured by the network device in the first time period; A first probability of the wireless link experiencing RLF predicted based on the model in the first time period is higher than a probability threshold of the wireless link experiencing RLF determined based on the first function in the first time period; A proportion of a duration of a first time in a total duration of the first time period is higher than a threshold, the first time being a time period corresponding to a time when the probability of the wireless link experiencing RLF predicted based on the model in the first time period is higher than the probability threshold of the wireless link experiencing RLF determined based on the first function.

75. The network device of any of claims 59-74, wherein, Before the network device receives the first information sent by the terminal device, the network device further includes: A sending unit configured to send first configuration information to the terminal device, the first configuration information being used to configure the terminal device to determine a predicted result of the wireless link experiencing RLF based on a model.

76. The network device of claim 75, wherein, The first configuration information is used to configure a first function used to determine a probability threshold of the wireless link experiencing RLF in a first time period.

77. A terminal device, comprising: A terminal device including a transceiver, a memory, and a processor, the memory being used to store a program, the processor being used to invoke the program in the memory and control the transceiver to receive or send signals, so that the terminal device performs the method in any one of claims 1-20.

78. A network device, comprising: A network device including a transceiver, a memory, and a processor, the memory being used to store a program, the processor being used to invoke the program in the memory and control the transceiver to receive or send signals, so that the network device performs the method in any one of claims 21-38.

79. An apparatus, comprising: An apparatus including a processor configured to invoke a program from a memory, so that the apparatus performs the method in any one of claims 1-38.

80. A chip, comprising: A chip including a processor configured to invoke a program from a memory, so that a device installed with the chip performs the method in any one of claims 1-38.

81. A computer-readable storage medium, characterized in that, A computer program product having a program stored thereon, the program causing a computer to perform the method in any one of claims 1-38.

82. A computer program product, characterised in that, A computer program product having a program stored thereon, the program causing a computer to perform the method in any one of claims 1-38.

83. A computer program, characterized in that, The computer program product causes a computer to perform the method in any one of claims 1-38.

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