Information recording, receiving method and apparatus, terminal, network device, and storage medium

Abstract

The present disclosure relates to the technical field of communication, in particular to an information recording method and device, a terminal, a network device and a storage medium, wherein the information recording method comprises: recording layer 1 or layer 2 triggered mobility LTM information when a radio link failure or a handover failure occurs. According to the present disclosure, the terminal can record the LTM information when the radio link failure or the handover failure occurs, so that the LTM information can be sent to the network device as needed or requested by the network device. Relative to the terminal recording the related information of the radio link failure or the handover failure when the radio link failure or the handover failure occurs, the LTM information can be used by the network device to accurately determine the LTM related information of the terminal, which is beneficial to ensuring that the network device can timely and accurately perform operations such as whether to perform LTM, whether to adjust the LTM configuration and the like according to the LTM information.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of communication, and in particular, to an information recording method, an information receiving method, an information recording apparatus, an information receiving apparatus, a terminal, a network device, a communication system, and a storage medium. BACKGROUND

[0002] In a terminal wireless network environment, handover (HO) can be performed between cells. When a terminal fails to perform a handover operation or a radio link failure (RLF) occurs in a serving cell, handover failure related information or RLF related information can be recorded in an RLF report for sending to a network device. The network device can perform appropriate operations according to the information reported by the terminal, so as to ensure the communication quality between the network device and the terminal. However, there are still some technical problems to be solved in the operation of recording information in the RLF by the terminal. SUMMARY

[0003] Embodiments of the present disclosure provide an information recording method, an information receiving method, an information recording apparatus, an information receiving apparatus, a terminal, a network device, and a storage medium, to solve the technical problems in the related art.

[0004] According to a first aspect of embodiments of the present disclosure, an information recording method is provided, executed by a terminal, and the method comprises: recording layer 1 or layer 2 triggered mobility LTM information in response to occurrence of a radio link failure or a handover failure.

[0005] According to a second aspect of embodiments of the present disclosure, an information receiving method is provided, executed by a network device, and the method comprises: receiving layer 1 or layer 2 triggered mobility LTM information sent by a terminal, wherein the LTM information is recorded in the case where the terminal occurs a radio link failure or a handover failure.

[0006] According to a third aspect of embodiments of the present disclosure, an information recording apparatus is provided, and the apparatus comprises: a processing module configured to record layer 1 or layer 2 triggered mobility LTM information in response to occurrence of a radio link failure or a handover failure.

[0007] According to a fourth aspect of embodiments of the present disclosure, an information receiving apparatus is provided, executed by a network device, and the apparatus comprises: a receiving module configured to receive layer 1 or layer 2 triggered mobility LTM information sent by a terminal, wherein the LTM information is recorded in the case where the terminal occurs a radio link failure or a handover failure.

[0008] According to a fifth aspect of the embodiments of the present disclosure, a terminal is provided, comprising: one or more processors; wherein the terminal is configured to perform the information recording method in the first aspect or any one of the optional embodiments of the first aspect.

[0009] According to a sixth aspect of the embodiments of the present disclosure, a network device is provided, comprising: one or more processors; wherein the network device is configured to perform the information receiving method in the second aspect or any one of the optional embodiments of the second aspect.

[0010] According to a seventh aspect of the embodiments of the present disclosure, a communication system is provided, comprising a terminal and a network device, wherein the terminal is configured to implement the information recording method in the first aspect or any one of the optional embodiments of the first aspect, and the network device is configured to implement the information receiving method in the second aspect or any one of the optional embodiments of the second aspect.

[0011] According to an eighth aspect of the embodiments of the present disclosure, a storage medium is provided, which stores instructions, when the instructions run on a communication device, cause the communication device to perform the information recording method in the first aspect or any one of the optional embodiments of the first aspect, and / or the information receiving method in the second aspect or any one of the optional embodiments of the second aspect.

[0012] According to the embodiments of the present disclosure, the terminal can record the LTM information in the case of occurrence of the radio link failure or the handover failure, so that the LTM information can be sent to the network device as needed or requested by the network device subsequently. Relative to the terminal recording the information related to the radio link failure or the handover failure in the case of occurrence of the radio link failure or the handover failure, the LTM information can be used for the network device to accurately determine the LTM related information of the terminal, which is beneficial to ensure that the network device can timely and accurately perform the operation of whether to perform the LTM, whether to adjust the LTM configuration and the like according to the LTM information. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can also be obtained by those skilled in the art without any creative labor based on these drawings.

[0014] Figure 1 is an architecture schematic diagram of a communication system according to the embodiments of the present disclosure.

[0015] Figure 2 is an interaction schematic diagram of an information recording method according to the embodiments of the present disclosure.

[0016] Figure 3 is a schematic flow chart of an information recording method according to an embodiment of the present disclosure.

[0017] Figure 4 is a schematic flow chart of an information receiving method according to an embodiment of the present disclosure.

[0018] Figure 5 is a schematic block diagram of an information recording apparatus according to an embodiment of the present disclosure.

[0019] Figure 6 is a schematic block diagram of an information receiving apparatus according to an embodiment of the present disclosure.

[0020] Figure 7A is a structural schematic diagram of a communication device according to an embodiment of the present disclosure.

[0021] Figure 7B is a structural schematic diagram of a chip according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0022] Embodiments of the present disclosure propose information recording, receiving methods and apparatuses, terminals, network devices and storage media.

[0023] In a first aspect, embodiments of the present disclosure propose an information recording method, executed by a terminal, comprising: recording layer 1 or layer 2 triggered mobility LTM information in case of occurrence of a radio link failure or a handover failure.

[0024] In the above embodiments, the terminal can record LTM information in case of occurrence of a radio link failure or a handover failure, so that the LTM information can be sent to a network device as needed or requested by the network device subsequently. Relative to the terminal recording RLF, handover failure related information in case of occurrence of a radio link failure or a handover failure, the LTM information can be used for the network device to accurately determine the LTM related information of the terminal, which is conducive to ensuring that the network device can timely and accurately perform operations such as whether to perform LTM, whether to adjust LTM configuration, etc. according to the LTM information.

[0025] In combination with some embodiments of the first aspect. In some embodiments, the LTM information comprises at least one of: a cell identification based on LTM recovery; an LTM measurement result of a neighbor cell; LTM information related to the radio link failure; LTM information related to the handover failure; a reestablishment cell identification.

[0026] In combination with some embodiments of the first aspect. In some embodiments, the information recording method further comprises: sending indication information to a network device, wherein the indication information is used to indicate whether the neighbor cell is an LTM candidate cell.

[0027] In some embodiments of the first aspect. In some embodiments, the LTM measurement result comprises at least one of: an L1 measurement result; an L3 measurement result.

[0028] In some embodiments of the first aspect. In some embodiments, the LTM measurement result of the neighbor cell comprises an LTM measurement result of a first cell, wherein the first cell comprises at least one of: a cell in the neighbor cell satisfying a first condition; a cell in the neighbor cell not satisfying the first condition.

[0029] In some embodiments of the first aspect. In some embodiments, the first condition comprises at least one of: a relationship between an offset of the LTM measurement result of the first cell with respect to a corresponding measurement result of a second cell and a first threshold value, satisfying a first predefined relationship; a relationship between the LTM measurement result of the first cell and a second threshold value, satisfying a second predefined relationship.

[0030] In some embodiments of the first aspect. The second cell comprises at least one of: a current serving cell of the terminal, a cell where the radio link failure occurs, a cell where the handover failure occurs, an LTM candidate cell.

[0031] In some embodiments of the first aspect. In some embodiments, the LTM information related to the radio link failure comprises at least one of: first time information, wherein the first time information is used to indicate a time interval from receiving an LTM configuration to the radio link failure of the terminal; a type of cell handover performed by the terminal before the radio link failure; information of an LTM candidate cell.

[0032] In some embodiments of the first aspect. In some embodiments, the LTM information related to the handover failure comprises at least one of: second time information, wherein the second time information is used to indicate a time interval from receiving an LTM configuration to the handover failure of the terminal; a type of cell handover performed by the terminal before the handover failure; information of an LTM candidate cell.

[0033] In some embodiments of the first aspect. In some embodiments, the LTM candidate cell does not comprise a neighbor cell corresponding to the LTM measurement result.

[0034] In some embodiments of the first aspect. In some embodiments, the information recording method further comprises: sending the LTM information to a network device.

[0035] In some embodiments of the first aspect. In some embodiments, the information recording method further includes: sending capability information to the network device, wherein the capability information is used to indicate at least one of the following: whether the terminal supports recording LTM information related to radio link failure or handover failure; whether the terminal sends LTM information related to radio link failure or handover failure.

[0036] In a second aspect, embodiments of the present disclosure provide an information receiving method, performed by a network device, the method comprising: receiving layer 1 or layer 2 triggered mobility LTM information sent by a terminal, wherein the LTM information is recorded in the case that the terminal experiences radio link failure or handover failure.

[0037] In some embodiments of the second aspect. In some embodiments, the LTM information includes at least one of the following: a cell identity based on LTM recovery; LTM measurement results of a neighbor cell; LTM information related to the radio link failure; LTM information related to the handover failure; a reestablishment cell identity.

[0038] In some embodiments of the second aspect. In some embodiments, the information receiving method further includes: receiving indication information sent by the terminal, wherein the indication information is used to indicate whether the neighbor cell is an LTM candidate cell.

[0039] In some embodiments of the second aspect. In some embodiments, the LTM measurement results include at least one of the following: L1 measurement results; L3 measurement results.

[0040] In some embodiments of the second aspect. In some embodiments, the LTM measurement results of the neighbor cell include LTM measurement results of a first cell, wherein the first cell includes at least one of the following: a cell in the neighbor cell that satisfies a first condition; a cell in the neighbor cell that does not satisfy the first condition.

[0041] In some embodiments of the second aspect. In some embodiments, the first condition includes at least one of the following: a relationship between an offset of the LTM measurement results of the first cell relative to corresponding measurement results of a second cell and a first threshold value satisfies a first predefined relationship; a relationship between the LTM measurement results of the first cell and a second threshold value satisfies a second predefined relationship.

[0042] In some embodiments of the second aspect. The second cell includes at least one of the following: a current serving cell of the terminal, a cell where the radio link failure occurs, a cell where the handover failure occurs, an LTM candidate cell.

[0043] Some embodiments combine the second aspect. In some embodiments, the LTM information related to the radio link failure comprises at least one of: first time information, wherein the first time information is used to indicate a time interval from when the terminal receives an LTM configuration to when the radio link failure occurs; a type of cell switching performed by the terminal before the radio link failure; information of an LTM candidate cell.

[0044] Some embodiments combine the second aspect. In some embodiments, the LTM information related to the handover failure comprises at least one of: second time information, wherein the second time information is used to indicate a time interval from when the terminal receives an LTM configuration to when the handover failure occurs; a type of cell switching performed by the terminal before the handover failure; information of an LTM candidate cell.

[0045] Some embodiments combine the second aspect. In some embodiments, the information of the LTM candidate cell does not comprise a neighbor cell corresponding to the LTM measurement result.

[0046] Some embodiments combine the second aspect. In some embodiments, the information receiving method further comprises: receiving capability information sent by the terminal, wherein the capability information is used to indicate at least one of: whether the terminal supports recording LTM information related to a radio link failure or a handover failure; whether the terminal sends LTM information related to a radio link failure or a handover failure.

[0047] In a third aspect, embodiments of the present disclosure provide an information recording apparatus, comprising: a processing module configured to record layer 1 or layer 2 triggered mobility LTM information in response to a radio link failure or a handover failure occurring.

[0048] In a fourth aspect, embodiments of the present disclosure provide an information receiving apparatus executed by a network device, comprising: a receiving module configured to receive layer 1 or layer 2 triggered mobility LTM information sent by a terminal, wherein the LTM information is recorded in the case that the terminal has a radio link failure or a handover failure.

[0049] In a fifth aspect, embodiments of the present disclosure provide a terminal, comprising: one or more processors; wherein the terminal is configured to perform the information recording method of the first aspect or any one of the optional embodiments of the first aspect.

[0050] In a sixth aspect, embodiments of the present disclosure provide a network device, comprising: one or more processors; wherein the network device is configured to perform the information receiving method of the second aspect or any one of the optional embodiments of the second aspect.

[0051] In a seventh aspect, embodiments of the present disclosure provide a communication system, comprising a terminal configured to implement the information recording method of the first aspect or any of the optional embodiments of the first aspect, and a network device configured to implement the information receiving method of the second aspect or any of the optional embodiments of the second aspect.

[0052] In an eighth aspect, embodiments of the present disclosure provide a storage medium storing instructions that, when executed on a communication device, cause the communication device to perform the information recording method of the first aspect or any of the optional embodiments of the first aspect, and / or the information receiving method of the second aspect or any of the optional embodiments of the second aspect.

[0053] In a ninth aspect, embodiments of the present disclosure provide a program product that, when executed on a communication device, causes the communication device to perform the information recording method of the first aspect or any of the optional embodiments of the first aspect, and / or the information receiving method of the second aspect or any of the optional embodiments of the second aspect.

[0054] In a tenth aspect, embodiments of the present disclosure provide a computer program that, when executed on a computer, causes the computer to perform the information recording method of the first aspect or any of the optional embodiments of the first aspect, and / or the information receiving method of the second aspect or any of the optional embodiments of the second aspect.

[0055] It can be understood that the above information recording and receiving apparatuses, communication devices, communication systems, storage media, program products, and computer programs are all used to perform the methods proposed in the embodiments of the present disclosure. Therefore, the beneficial effects they can achieve can refer to the beneficial effects in the corresponding methods, which will not be described here again.

[0056] Embodiments of the present disclosure provide information recording and receiving methods and apparatuses, terminals, network devices, and storage media. In some embodiments, the terms information recording and receiving method, information processing method, and communication method can be replaced with each other, the terms information recording and receiving apparatus, information processing apparatus, and communication apparatus can be replaced with each other, and the terms information processing system and communication system can be replaced with each other.

[0057] The embodiments of the present disclosure are not exhaustive, but only illustrate some embodiments, and are not specific limitations on the protection scope of the present disclosure. In the case of no contradiction, each step in an embodiment can be implemented as an independent embodiment, and the steps can be combined arbitrarily, for example, the scheme after removing part of the steps in an embodiment can also be implemented as an independent embodiment, and the order of the steps in an embodiment can be exchanged arbitrarily, in addition, the optional implementation manners in an embodiment can be combined arbitrarily; in addition, the embodiments can be combined arbitrarily, for example, part or all steps of different embodiments can be combined arbitrarily, an embodiment can be combined with optional implementation manners of other embodiments arbitrarily.

[0058] In each embodiment of the present disclosure, the terms and / or descriptions between the embodiments are consistent if there is no special description and logical conflict, and can be referred to each other, and the technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0059] The terms used in the embodiments of the present disclosure are only for the purpose of describing the specific embodiments, and not as a limitation on the present disclosure.

[0060] In the embodiments of the present disclosure, unless otherwise specified, the elements expressed in singular form, such as "one", "a", "the", "above", "said", "preceding", "this" and the like, can represent "one and only one", and can also represent "one or more", "at least one" and the like.

[0061] For example, in the case of using articles such as "a", "an", "the" and the like in translation, the noun after the article can be understood as singular expression, and can also be understood as plural expression.

[0062] In the embodiments of the present disclosure, "a plurality of" means two or more.

[0063] In some embodiments, the terms "at least one of", "one or more", "a plurality of", "multiple" and the like can be replaced with each other.

[0064] In some embodiments, the description of "at least one of A, B", "A and / or B", "one of A or B", "at least one of A or B", "one of A or B" and the like, can include the following technical solutions according to the situation: in some embodiments, A is executed (A is executed regardless of B); in some embodiments, B is executed (B is executed regardless of A); in some embodiments, A and B are selectively executed (A and B are selected from A and B); in some embodiments, A and B are executed (A and B are executed). When there are more branches such as A, B, C, and the like, the above description is similar.

[0065] In some embodiments, the description of "A or B" and the like can include the following technical solutions according to the situation: in some embodiments, A is executed (A is executed regardless of B); in some embodiments, B is executed (B is executed regardless of A); in some embodiments, A and B are selectively executed (A and B are selected from A and B). When there are more branches such as A, B, C, and the like, the above description is similar.

[0066] The prefix words "first", "second" and the like in the embodiments of the present disclosure are only used to distinguish different description objects, and do not constitute a limitation on the position, order, priority, quantity or content of the description objects. The description of the description objects should refer to the description in the context of the claims or embodiments, and should not constitute an unnecessary limitation because of the use of the prefix words.

[0067] For example, the description object is "field", and the ordinal words before "field" in "first field" and "second field" do not limit the position or order between "fields". "First" and "second" do not limit whether the "fields" they modify are in the same message, nor do they limit the order of "first field" and "second field". For another example, the description object is "level", and the ordinal words before "level" in "first level" and "second level" do not limit the priority between "levels". For another example, the number of description objects is not limited by ordinal words, and can be one or more. For example, "first device", where the number of "devices" can be one or more. In addition, objects modified by different prefix words can be the same or different, for example, the description object is "device", and "first device" and "second device" can be the same device or different devices, and their types can be the same or different. For another example, the description object is "information", and "first information" and "second information" can be the same information or different information, and their contents can be the same or different.

[0068] In some embodiments, "including A", "containing A", "for indicating A", "carrying A" can be interpreted as directly carrying A, or indirectly indicating A.

[0069] In some embodiments, the terms “in response to,” “in response to determining,” “in the event that,” “when,” “if,” “upon,” and the like can be replaced with each other.

[0070] In some embodiments, the terms “greater than,” “greater than or equal to,” “not less than,” “more than,” “more than or equal to,” “not less than,” “higher than,” “higher than or equal to,” “not lower than,” “above,” and the like can be replaced with each other, and the terms “less than,” “less than or equal to,” “not greater than,” “less than,” “less than or equal to,” “not more than,” “lower than,” “lower than or equal to,” “not higher than,” “below,” and the like can be replaced with each other.

[0071] In some embodiments, an apparatus and the like can be interpreted as an entity, and can also be interpreted as virtual, and the name thereof is not limited to the name described in the embodiments, and the terms “apparatus,” “equipment,” “device,” “circuit,” “network element,” “node,” “function,” “unit,” “section,” “system,” “network,” “chip,” “chip system,” “entity,” “subject,” and the like can be replaced with each other.

[0072] In some embodiments, “network” can be interpreted as an apparatus (for example, an access network device, a core network device, and the like) included in the network.

[0073] In some embodiments, the terms “access network device (AN device),” “radio access network device (RAN device),” “base station (BS),” “radio base station,” “fixed station,” “node,” “access point,” “transmission point (TP),” “reception point (RP),” “transmission / reception point (TRP),” “panel,” “antenna panel,” “antenna array,” “cell,” “macro cell,” “small cell,” “femto cell,” “pico cell,” “sector,” “cell group,” “serving cell,” “carrier,” “component carrier,” “bandwidth part (BWP),” and the like can be used interchangeably.

[0074] In some embodiments, the terms "terminal," "terminal device," "user equipment (UE)," "user terminal," "mobile station (MS)," "mobile terminal (MT)," "subscriber station," "mobile unit," "subscriber unit," "wireless unit," "remote unit," "mobile device," "wireless device," "wireless communication device," "remote device," "mobile subscriber station," "access terminal," "mobile terminal," "wireless terminal," "remote terminal," "handset," "user agent," "mobile client," "client," and so on can be replaced with each other.

[0075] In some embodiments, the access network device, the core network device, or the network device can be replaced with a terminal. For example, the embodiments of the present disclosure can also be applied to a structure in which communication between the access network device, the core network device, or the network device and the terminal is replaced with communication between a plurality of terminals (e.g., device-to-device (D2D), vehicle-to-everything (V2X), etc.). In this case, the terminal can also be configured to have all or part of the functions of the access network device. In addition, the terms "uplink," "downlink," and the like can also be replaced with terms corresponding to the inter-terminal communication (e.g., "side"). For example, the uplink channel, the downlink channel, and the like can be replaced with the side channel, and the uplink, the downlink, and the like can be replaced with the sidelink.

[0076] In some embodiments, the terminal can be replaced with the access network device, the core network device, or the network device. In this case, the access network device, the core network device, or the network device can also be configured to have all or part of the functions of the terminal.

[0077] In some embodiments, obtaining data, information, etc. can comply with laws and regulations of the country where the location is.

[0078] In some embodiments, data, information, etc. can be obtained after obtaining user consent.

[0079] In addition, each element, each row, or each column in the table of the embodiments of the present disclosure can be implemented as an independent embodiment, and any combination of any element, any row, or any column can also be implemented as an independent embodiment.

[0080] Figure 1 is an architecture diagram of a communication system according to the embodiments of the present disclosure.

[0081] As shown in Figure 1 , the communication system 100 includes a terminal 101 and a network device 102, where the network device includes at least one of the following: an access network device, a core network device.

[0082] In some embodiments, the terminal 101 includes at least one of the following, but is not limited thereto: a mobile phone, a wearable device, an Internet of Things device, a car with communication function, a smart car, a Pad, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in smart grid, a wireless terminal device in transportation safety, a wireless terminal device in smart city, and a wireless terminal device in smart home.

[0083] In some embodiments, the access network device is, for example, a node or device that accesses a terminal to a wireless network, and the access network device can include at least one of an evolved NodeB (eNB) in a 5G communication system, a next generation eNB (ng-eNB), a next generation NodeB (gNB), a node B (NB), a home node B (HNB), a home evolved node B (HeNB), a wireless backhaul device, a radio network controller (RNC), a base station controller (BSC), a base transceiver station (BTS), a base band unit (BBU), a mobile switching center, a base station in a 6G communication system, an Open RAN, a Cloud RAN, a base station in other communication systems, an access node in a Wi-Fi system, but is not limited thereto.

[0084] In some embodiments, the core network device can be one device including one or more network elements, or can be multiple devices or device groups including all or part of the one or more network elements described above. The network element can be virtual or physical. The core network includes, for example, at least one of an evolved packet core (EPC), a 5G core network (5GCN), and a next generation core (NGC).

[0085] In some embodiments, the technical solutions of the present disclosure can be applied to an Open RAN architecture, at which time the interfaces between or within the access network devices involved in the embodiments of the present disclosure can become internal interfaces of the Open RAN, and the processes and information interactions between these internal interfaces can be realized by software or programs.

[0086] In some embodiments, the access network device can be composed of a central unit (CU) and a distributed unit (DU), where the CU can also be referred to as a control unit. The CU-DU structure can split the protocol layers of the access network device, and some of the protocol layers are controlled by the CU, and the remaining or all of the protocol layers are distributed in the DU and controlled by the CU, but is not limited thereto.

[0087] It can be understood that the communication system described in the embodiments of the present disclosure is for more clearly illustrating the technical solutions of the embodiments of the present disclosure, and does not constitute a limitation on the technical solutions proposed by the embodiments of the present disclosure. Those skilled in the art can know that, with the evolution of system architecture and the appearance of new business scenarios, the technical solutions proposed by the embodiments of the present disclosure are also applicable to similar technical problems.

[0088] The embodiments of the present disclosure described below can be applied to Figure 1 The communication system 100 shown or part of the main body, but not limited thereto. Figure 1 The main body shown is an example, the communication system can include Figure 1 All or part of the main body in Figure 1 Other main body, the number and form of each main body is arbitrary, each main body can be real or virtual, the connection relationship between each main body is an example, each main body can not be connected or connected, its connection can be any way, can be direct connection or indirect connection, can be wired connection or wireless connection.

[0089] Embodiments of the present disclosure can be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 5G new radio (NR), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (Bluetooth (registered trademark)), Public Land Mobile Network (PLMN) network, Device-to-Device (D2D) system, Machine to Machine (M2M) system, Internet of Things (IoT) system, Vehicle-to-Everything (V2X), system using other communication methods, next-generation system expanded based thereon, and the like. Further, a plurality of systems can be applied in combination (for example, combination of LTE or LTE-A and 5G, and the like).

[0090] In some embodiments, the terminal can perform a handover (HO) operation, and when the terminal fails to perform the handover operation or a radio link failure (RLF) occurs in a serving cell, the terminal can record handover failure related information or RLF related information in an RLF report and send the RLF report to the network device. For example, the network device can appropriately understand the network environment of the terminal according to the information reported by the terminal, and then perform appropriate operations to ensure the communication quality between the network device and the terminal.

[0091] In some embodiments, the terminal can record measurement results of the terminal measuring a cell in the RLF report, but the measurement results do not include layer 1 or layer 2 triggered mobility (L1 / L2-Triggered Mobility, LTM) related information. For some scenarios, the RLF report without recording the LTM information is insufficient for the network device to understand the network environment of the terminal, and it is difficult to ensure that the network device appropriately understands the network environment of the terminal.

[0092] For example, in an LTM scenario, the network device can configure LTM configuration information for the terminal, and the LTM configuration information includes an LTM candidate cell (which can be one cell or a cell group composed of multiple cells) and related information for communication in the candidate cell.

[0093] The terminal can perform LTM cell switching. For example, the network device can instruct the terminal to change a cell through layer 1 (for example, through downlink control information (DCI)) or layer 2 (for example, through a media access control layer control element (MAC CE)), such as instructing the terminal to change the cell from candidate cell #1 to candidate cell #2.

[0094] Since the related information for communication in the candidate cell is pre-configured to the terminal by the network device through LTM configuration, after the terminal switches to the candidate cell #2, the network device does not have to configure the related information for communication in the candidate cell #2 to the terminal, which is beneficial for the terminal to complete cell switching and communication as soon as possible.

[0095] However, L3 triggered mobility cell switching, such as traditional handover (HO) and conditional handover (CHO), is triggered through radio resource control (RRC) signaling, which is relatively time-consuming compared to LTM cell switching and is not conducive to the terminal to complete cell switching and communication as soon as possible.

[0096] In the related art, the terminal can perform LTM cell switching based on the LTM configuration information configured by the network device and the switching command sent by the network device, however, the RLF report in the related art does not contain LTM information, so it cannot be accurately used by the network device to determine the LTM situation of the terminal, therefore, it is necessary to improve the information recorded by the terminal when the radio link failure or the switching failure occurs.

[0097] Figure 2 is an interactive schematic diagram of an information recording method according to an embodiment of the present disclosure.

[0098] As Figure 2 shown, the information recording method comprises the following steps:

[0099] In step S201, the terminal can record the layer 1 or layer 2 triggered mobility LTM information.

[0100] In some embodiments, the terminal records the LTM information in response to the occurrence of the radio link failure or the switching failure.

[0101] For example, the switching failure comprises at least one of the following: conventional switching failure, conditional handover (CHO) failure, LTM switching failure, DAPS (Dual Active Protocol Stack) switching.

[0102] In some embodiments, the terminal can record the LTM information in the report variable, or can record it in other ways, and the present disclosure does not limit this.

[0103] In step S202, the terminal can send the LTM information to the network device.

[0104] In some embodiments, the terminal can send the LTM information to the network device through the RLF report, or can send the LTM information to the network device in other ways.

[0105] In some embodiments, the terminal can send the LTM information to the network device only after receiving the request information sent by the network device.

[0106] The request information sent by the network device can be multiplexed with conventional request information (such as a request for obtaining the RLF report), or the request information can be newly defined request information, and the newly defined request information can be specifically used to request the terminal to send the LTM information.

[0107] In some embodiments, the terminal sends the LTM information to the network device, which can also be performed without being based on the request information of the network device, for example, the terminal can determine a time t1 of recording the LTM information, and when no request information of the network device is received within a time range of t1 for a duration T1, the terminal can automatically send (for example, on a pre-configured resource) the LTM information to the network device, thereby avoiding the LTM information of the terminal being deleted during the LTM information storage time process, and causing the waste of the measurement operation overhead.

[0108] In embodiments of the present disclosure, the terminal can record the LTM information in the case of occurrence of the radio link failure or the handover failure, so that the LTM information can be subsequently sent to the network device as needed or upon request of the network device. Relative to the terminal recording the RLF or the handover failure related information in the case of occurrence of the radio link failure or the handover failure, the LTM information can be used by the network device to accurately determine the LTM related information of the terminal, thereby facilitating the network device to accurately perform the operation of whether to perform the LTM, whether to adjust the LTM configuration, and the like in a timely manner.

[0109] In some embodiments, the LTM information includes at least one of the following:

[0110] a cell identifier based on LTM recovery;

[0111] an LTM measurement result of a neighbor cell;

[0112] LTM information related to the radio link failure;

[0113] LTM information related to the handover failure;

[0114] a reestablishment cell identifier.

[0115] In some embodiments, the LTM information can include a cell identifier based on LTM recovery.

[0116] For example, the terminal can perform cell selection in the case of occurrence of the RLF or the handover failure in a current cell (for example, a serving cell).

[0117] When the LTM configuration of the terminal is available, the selected cell is an LTM candidate cell in the LTM configuration, and the terminal is allowed to perform LTM based recovery, the terminal can perform recovery in the selected LTM candidate cell, for example, perform communication in the selected LTM candidate cell based on the related information for communication in the candidate cell. In this case, the terminal can record an identifier of the selected LTM candidate cell as a cell identifier based on LTM recovery.

[0118] When the LTM configuration of the terminal is not available, or the selected cell is not an LTM candidate cell in the LTM configuration, or the terminal is not allowed to perform LTM-based recovery, the terminal can perform radio resource control reestablishment in the selected cell. In this case, the terminal can not necessarily record the cell identity of the LTM-based recovery.

[0119] In some embodiments, the LTM information can include LTM measurement results of the neighbor cells.

[0120] For example, the terminal can perform measurement on the neighbor cells to obtain the LTM measurement results of the neighbor cells in the case that the current cell (e.g., the serving cell) where the terminal is located experiences RLF or handover failure, and then the terminal can record the LTM measurement results of the neighbor cells as one of the LTM information.

[0121] In some embodiments, when the RLF occurs, the LTM cell switch configuration in the LTM configuration variable (VarLTM-Config) is available, or when the handover fails or succeeds, the last executed radio resource control reconfiguration (RRCReconfiguration) message including reconfiguration with synchronization (reconfigurationWithSync) is about LTM cell switch, the terminal can use a first measurement result list (e.g., measResultListNR-r18) to record the LTM measurement results in the first measurement result list, otherwise, the terminal can use a second measurement result list (e.g., measResultListNR-r16) to record the LTM measurement results in the second measurement result list.

[0122] In some embodiments, the terminal can send indication information to the network device, where the indication information is used to indicate whether the neighbor cell is an LTM candidate cell.

[0123] For example, the neighbor cells corresponding to the LTM measurement results recorded by the terminal can only include LTM candidate cells, or can only include non-LTM candidate cells, or can include both LTM candidate cells and non-LTM candidate cells.

[0124] In the case that the neighbor cells corresponding to the LTM measurement results recorded by the terminal can include LTM candidate cells, the terminal can indicate the type of the neighbor cells corresponding to the recorded LTM measurement results, for example, by indication information, so that the network device can determine which LTM measurement results correspond to LTM candidate cells and / or which measurement results correspond to non-LTM candidate cells among the LTM measurement results sent by the terminal.

[0125] In some embodiments, the indication information for indicating whether the neighbor cell is an LTM candidate cell can be explicit indication information.

[0126] For example, the terminal can record LTM measurement results of n neighbor cells, and the indication information can include n bits, the i th bit of the n bits can be used to indicate whether the neighbor cell corresponding to the i th LTM measurement result of the n LTM measurement results is an LTM candidate cell.

[0127] For example, the i th bit value of 0 indicates that the i th cell is not an LTM candidate cell, the i th bit value of 1 indicates that the i th cell is not an LTM candidate cell, or the i th bit value of 1 indicates that the i th cell is not an LTM candidate cell, and the i th bit value of 0 indicates that the i th cell is not an LTM candidate cell.

[0128] For example, in the case where the indication information exists, it can be indicated that the neighbor cells corresponding to the measurement results corresponding to the LTM measurement results include LTM candidate cells or all are LTM candidate cells, and in the case where the indication information exists, it can be indicated that the neighbor cells corresponding to the measurement results corresponding to the LTM measurement results do not include LTM candidate cells.

[0129] In some embodiments, the indication information can be a specific list, and the list includes at least one of the identification information of the neighbor cell and the LTM measurement result, and the list can represent that the neighbor cells corresponding to the LTM measurement results in the list are LTM candidate cells.

[0130] In some embodiments, the LTM measurement result of the neighbor cell can be implemented based on at least one of the following measurement operations: Minimization Drive Test (MDT), Self-Organizing Network (SON).

[0131] In some embodiments, the terminal can measure the beam of the neighbor cell, for example, can measure the Synchronization Signal and PBCH Block (SSB) in the beam, of course, the measured signal can not be limited to measuring the SSB, and other signals such as Channel State Information Reference Signal (CSI-RS) can also be measured, and the embodiments of the present disclosure are not limited thereto.

[0132] In some embodiments, the LTM measurement result includes at least one of the following: L1 measurement result; L3 measurement result.

[0133] For example, when the terminal measures the signal in the cell, the signal can be filtered by the L1 filter first, and the L1 measurement result is obtained. Then the L1 measurement result can be input into the L3 filter, and the L3 filtering result is obtained.

[0134] For example, the related parameters of the L1 filter can be determined based on the terminal implementation specific.

[0135] For example, the related parameters of the L3 filter can be determined based on the parameters configured by the radio resource control (RRC).

[0136] For example, the measurement result corresponding to the neighbor cell can only contain the L1 measurement result; for example, the measurement result corresponding to the neighbor cell can contain the L1 measurement result and the L3 measurement result; for example, the measurement result corresponding to the neighbor cell can only contain the L3 measurement result.

[0137] In some embodiments, in the case that the measurement result corresponding to the neighbor cell only contains the L1 measurement result, the measurement result corresponding to the neighbor cell can be used by the network device to decide at least one of the following: whether to perform LTM, how (e.g., in which time-frequency resource) to perform LTM.

[0138] In some embodiments, in the case that the measurement result corresponding to the neighbor cell contains the L1 measurement result and the L3 measurement result, the measurement result corresponding to the neighbor cell can be used by the network device to decide at least one of the following: whether to perform LTM or perform handover based on the L3 measurement result (e.g., traditional HO, CHO, etc.), how (e.g., in which time-frequency resource) to perform LTM, how (e.g., in which time-frequency resource) to perform handover based on the L3 measurement result.

[0139] In some embodiments, in the case that the measurement result corresponding to the neighbor cell only contains the L3 measurement result, the measurement result corresponding to the neighbor cell can be used by the network device to decide at least one of the following: whether it is reasonable to perform handover based on the L3 measurement result, whether it is still necessary to perform LTM.

[0140] As for whether the measurement result corresponding to the neighbor cell contains the L1 measurement result, or contains the L3 measurement result, or contains the L1 measurement result and the L3 measurement result, it can be indicated by the network device or agreed by the protocol.

[0141] In some embodiments, the L1 measurement result and the L3 measurement result can be measurement results for the same neighbor cell (e.g., the L1 measurement result is an L1 measurement result for neighbor cell #1, and the L3 measurement result is an L3 measurement result for neighbor cell #1).

[0142] In some embodiments, the L1 measurement result and the L3 measurement result can be measurement results for different neighbor cells (e.g., the L1 measurement result is an L1 measurement result for neighbor cell #1, and the L3 measurement result is an L3 measurement result for neighbor cell #2).

[0143] Whether the L1 measurement result and the L3 measurement result are measurement results for the same neighbor cell or measurement results for different neighbor cells, the terminal can determine based on network device indication or protocol agreement, and the present disclosure does not limit this.

[0144] In some embodiments, since the L1 measurement result includes a physical layer measurement result, when the terminal sends the LTM information to the network device through RRC signaling, the terminal can first perform internal interaction, such as obtaining the L1 measurement result from the physical layer through the RRC layer, and then realizing sending the LTM information containing the L1 measurement result to the network device through RRC signaling.

[0145] In some embodiments, the LTM measurement result of the neighbor cell includes the LTM measurement result of the first cell, wherein the first cell includes at least one of the following:

[0146] A cell in the neighbor cell that satisfies the first condition;

[0147] A cell in the neighbor cell that does not satisfy the first condition.

[0148] For example, the terminal can record the LTM measurement result only for the neighbor cell that satisfies the first condition, or can record the LTM measurement result only for the neighbor cell that does not satisfy the first condition, or can record the LTM measurement result for the neighbor cell that satisfies the first condition and the neighbor cell that does not satisfy the first condition (e.g., all neighbor cells).

[0149] In some embodiments, the first condition includes at least one of the following:

[0150] The relationship between the offset of the LTM measurement result of the first cell relative to the measurement result corresponding to the second cell and the first threshold value satisfies a first predefined relationship, for example, the first relationship includes at least one of the following: the offset is greater than the first threshold value, the offset is less than the first threshold value, and the offset is equal to the first threshold value;

[0151] The relationship between the LTM measurement result of the first cell and the second threshold value satisfies a second predefined relationship, for example, the second predefined relationship includes at least one of the following: the LTM measurement result is greater than the second threshold value, the LTM measurement result is less than the second threshold value, and the LTM measurement result is equal to the second threshold value.

[0152] It should be noted that at least one of the first threshold value and the second threshold value can be agreed by a protocol or can be configured by a network device. At least one of the first predefined relationship and the second predefined relationship can be agreed by a protocol or can be configured by a network device.

[0153] For example, the second cell includes at least one of the following: a current serving cell of the terminal, a cell in which the RLF occurs, a cell in which the handover failure occurs, and an LTM candidate cell.

[0154] The following is an example of the content of the first condition by taking four neighbor cells cell#1, cell#2, cell#3, and cell#4 as an example.

[0155] In some embodiments, the terminal can measure the four neighbor cells respectively to obtain four measurement results, which are LTM measurement result#1 corresponding to cell#1, LTM measurement result#2 corresponding to cell#2, LTM measurement result#3 corresponding to cell#3, and LTM measurement result#4 corresponding to cell#4.

[0156] For example, the first condition includes a relationship between an offset of the LTM measurement result of the first cell relative to a measurement result corresponding to the second cell and the first threshold value, and the relationship satisfies a first predefined relationship.

[0157] The terminal can also measure the second cell to obtain a measurement result#0. The terminal can compare (for example, calculate a difference value) the LTM measurement result#1, the LTM measurement result#2, the LTM measurement result#3, and the LTM measurement result#4 with the measurement result#0 respectively to determine the offset relative to the measurement result#0.

[0158] For example, an offset#1 of the LTM measurement result#1 relative to the measurement result#0 satisfies a relationship with the first threshold value, and the offset#2 of the LTM measurement result#2 relative to the measurement result#0, the offset#3 of the LTM measurement result#3 relative to the measurement result#0, and the offset#4 of the LTM measurement result#4 relative to the measurement result#0 do not satisfy the relationship with the first threshold value, and then the terminal can only record the LTM measurement result#1.

[0159] For example, the first condition includes a relationship between the LTM measurement result of the first cell and the second threshold value, and the relationship satisfies a second predefined relationship.

[0160] The terminal can determine the relationship between the LTM measurement result #1, the LTM measurement result #2, the LTM measurement result #3, the LTM measurement result #4 and the second threshold value respectively.

[0161] For example, the LTM measurement result #2 satisfies the second predefined relationship with the second threshold value, the LTM measurement result #3 satisfies the second predefined relationship with the second threshold value, the LTM measurement result #1 does not satisfy the second predefined relationship with the second threshold value, and the LTM measurement result #4 does not satisfy the second predefined relationship with the second threshold value, then the terminal can only record the LTM measurement result #2 and the LTM measurement result #3.

[0162] In some embodiments, the LTM information related to the radio link failure comprises at least one of:

[0163] First time information, wherein the first time information is used to indicate the time interval from when the terminal receives the LTM configuration to the radio link failure;

[0164] The type of cell switching performed by the terminal before the radio link failure, such as traditional switching, CHO, LTM switching, DAPS switching, etc.

[0165] Information of the LTM candidate cell.

[0166] In some embodiments, when the type of cell switching performed by the terminal before the radio link failure is a specific type (such as one of traditional switching, CHO, LTM switching, DAPS switching), the terminal records the type in the LTM information related to the RLF.

[0167] In some embodiments, in response to the occurrence of the RLF and the terminal having available LTM, the terminal records the LTM information related to the RLF.

[0168] After the network device sends the LTM configuration information to the terminal, it needs to reserve some resources for the terminal, so that when triggering the terminal to perform LTM switching, the terminal can successfully switch in the LTM candidate cell. However, if the resources are reserved for the terminal for a long time, it will cause the resources to be unable to be used by other terminals for a long time, which to some extent causes waste of resources.

[0169] According to the present embodiment, the LTM information related to the RLF can comprise first time information, and since the first time information is used to indicate the time interval from when the terminal receives the LTM configuration to the RLF, accordingly, the network device can determine whether the time interval from when the terminal receives the LTM configuration information to the RLF meets the requirement (such as the time interval being greater than an interval threshold value, or the time interval being less than the interval threshold value, or the time interval being equal to the interval threshold value), and further, in the case that the time interval does not meet the requirement, the LTM configuration information can be adjusted.

[0170] In some embodiments, in a case where the LTM information related to the RLF comprises a type of cell switching performed by the terminal before the RLF, the network device can determine whether the type meets a requirement (e.g., whether the type is a specific type (e.g., at least one of a legacy switching, a CHO, an LTM switching, a DAPS switching)), and in a case where the type does not meet the requirement, the LTM configuration information can be adjusted.

[0171] In some embodiments, in a case where the LTM information related to the RLF comprises information of an LTM candidate cell, the network device can determine whether the information of the LTM candidate cell in the LTM information related to the RLF meets a requirement (e.g., whether a time length for which a resource is reserved for the LTM candidate cell is within a preset time length range), and in a case where the information of the LTM candidate cell in the LTM information related to the RLF does not meet the requirement, the LTM configuration information can be adjusted.

[0172] It should be noted that whether and how the network device adjusts the LTM configuration information based on the LTM information related to the RLF can be implemented based on a network device self-strategy, or based on a protocol agreement, or can be indicated by a core network function module (e.g., an Access and Mobility Management Function (AMF)) or an Operation Administration and Maintenance (OAM).

[0173] In some embodiments, the LTM information related to the switching failure comprises at least one of:

[0174] Second time information, wherein the second time information is used to indicate a time interval from receiving the LTM configuration to the switching failure by the terminal;

[0175] A type of cell switching performed by the terminal before the switching failure;

[0176] Information of an LTM candidate cell.

[0177] In some embodiments, in a case where the type of cell switching performed by the terminal before the switching failure is a specific type (e.g., at least one of a legacy switching, a CHO, an LTM switching, a DAPS switching), the terminal records the type in the LTM information related to the RLF.

[0178] In some embodiments, in response to the occurrence of the switching failure and the LTM available to the terminal, the terminal records the LTM information related to the RLF.

[0179] Since the network device sends the LTM configuration information to the terminal, it needs to reserve some resources for the terminal, so that when triggering the terminal to perform LTM switching, the terminal can successfully switch in the LTM candidate cell. However, if the resources are reserved for the terminal for a long time, it will cause the resources to be unable to be used by other terminals for a long time, which to some extent causes waste of resources.

[0180] According to the embodiment, the LTM information related to the switching failure can include first time information, since the first time information is used to indicate the time interval from receiving the LTM configuration to the switching failure of the terminal, according to which the network device can determine whether the time interval from receiving the LTM configuration information to the switching failure of the terminal meets the requirement (for example, the time interval is greater than the interval threshold, or the time interval is less than the interval threshold, or the time interval is equal to the interval threshold), and further in the case that the time interval does not meet the requirement, the LTM configuration information can be adjusted.

[0181] In some embodiments, in the case that the LTM information related to the switching failure includes the type of cell switching performed by the terminal before the switching failure, the network device can determine whether the type meets the requirement (for example, whether the type is a specific type (for example, at least one of traditional switching, CHO, LTM switching, DAPS switching)), and further in the case that the type does not meet the requirement, the LTM configuration information can be adjusted.

[0182] In some embodiments, in the case that the LTM information related to the switching failure includes the information of the LTM candidate cell, the network device can determine whether the information of the LTM candidate cell in the LTM information related to the switching failure meets the requirement (for example, whether the duration of reserving resources for the LTM candidate cell is within a preset duration range), and further in the case that the information of the LTM candidate cell in the LTM information related to the switching failure does not meet the requirement, the LTM configuration information can be adjusted.

[0183] It should be noted that whether the network device adjusts the LTM configuration information according to the LTM information related to the switching failure, and how to adjust the LTM configuration information, can be realized based on the network device's own policy, or based on protocol agreement, or can be indicated by a core network function module (for example, AMF) or OAM.

[0184] In some embodiments, the LTM candidate cell does not include the neighbor cell corresponding to the LTM measurement result.

[0185] The terminal can carry the information of the LTM candidate cell in the RLF-related LTM information or the switching failure-related LTM information and send it to the network device.

[0186] For example, the information of the LTM candidate cell can indicate a candidate target cell list, which can be a candidate target cell list of LTM cell change in ltm-CandidateConfig at connection failure. Also, the information of the LTM candidate cell does not indicate a candidate target cell included in a corresponding cell of the measurement result of the neighboring cell (measResulNeighCell).

[0187] In some embodiments, the terminal can send capability information to the network device, wherein the capability information is used to indicate at least one of the following:

[0188] Whether the terminal supports recording LTM information related to RLF or handover failure

[0189] Whether the terminal sends LTM information related to RLF or handover failure.

[0190] In some embodiments, the terminal informs the network device of the support of the terminal for recording LTM information related to RLF or handover failure, and sending LTM information related to RLF or handover failure to the network device, so as to facilitate the network device to subsequently perform appropriate operations, and to avoid resource waste.

[0191] For example, the terminal supports recording LTM information related to RLF or handover failure, and supports sending LTM information related to RLF or handover failure to the network device, and the capability information sent by the terminal to the network device can indicate that the terminal supports recording LTM information related to RLF or handover failure, and supports sending LTM information related to RLF or handover failure to the network device.

[0192] In this case, when the network device needs LTM information related to RLF or handover failure, the network device can choose to send request information to the terminal to request the terminal to send LTM information related to RLF or handover failure to the network device.

[0193] For example, the terminal supports recording LTM information related to RLF or handover failure, but does not support sending LTM information related to RLF or handover failure to the network device, and the capability information sent by the terminal to the network device can indicate that the terminal supports recording LTM information related to RLF or handover failure, but does not support sending LTM information related to RLF or handover failure to the network device.

[0194] In this case, when the network device needs LTM information, the network device can choose to send request information to other devices capable of communicating with the terminal to request other devices to obtain LTM information related to RLF or handover failure from the terminal, and then obtain LTM information related to RLF or handover failure from other devices.

[0195] For example, the terminal does not support recording the LTM information related to the RLF or the handover failure, but supports sending the LTM information related to the RLF or the handover failure to the network device, and the capability information sent by the terminal to the network device can indicate that the terminal does not support recording the LTM information related to the RLF or the handover failure, but supports sending the LTM information related to the RLF or the handover failure to the network device.

[0196] In this case, since the terminal does not record the LTM information related to the RLF or the handover failure, the network device also does not have to try to obtain the LTM information related to the RLF or the handover failure requested from the terminal.

[0197] In some embodiments, before recording the LTM information in the RLF report, the terminal can choose to record the LTM information in the related report variable of the RLF report.

[0198] Of course, before the terminal records the LTM information in the RLF report, the terminal is not limited to recording the LTM information through the report variable, but can also record the LTM information through other manners, and the present disclosure is not limited thereto.

[0199] In some embodiments, the RLF report for recording the LTM information can reuse the existing RLF report, can newly define the RLF report dedicated for recording the LTM information, and in some embodiments, the RLF report related report variable for recording the LTM information can reuse the existing RLF report related report variable, can newly define the RLF report related report variable dedicated for recording the LTM information.

[0200] In some embodiments, when the terminal sends the RLF report recording the LTM information to the network device, the terminal can also indicate the identity of the LTM candidate cell (for example, the identity of the available LTM candidate cell) to the network device, and the network device can determine the LTM candidate cell according to the identity of the LTM candidate cell, and then can forward the RLF report sent by the terminal to the LTM candidate cell.

[0201] In some embodiments, the terminal can also send availability indication information to the network device, wherein the availability indication information is used to indicate at least one of the following: the terminal stores the available LTM information, and the available LTM candidate cell (for example, indicating the identity of the LTM candidate cell). According to this, the network device determines which LTM candidate cell is available, and / or determines whether the terminal stores the available LTM information.

[0202] In some embodiments, the availability indication information can be multiplexed with the conventional availability indication information; or can be newly defined availability indication information, which can be dedicated to indicating that the terminal stores available LTM related measurement results and / or available LTM candidate cells.

[0203] In addition, in some embodiments, the reporting for recording the LTM information is not limited to the RLF report (e.g., the conventional RLF report or the newly defined RLF report), and for example, the LTM information can also be recorded through other reports, which can be conventional reports, such as the conventional SON report (e.g., the conventional handover success report, the conventional connection establishment failure report, etc.), the conventional MDT report, etc.; or can be newly defined reports, such as the newly defined SON report (e.g., the newly defined handover success report, the newly defined connection establishment failure report, etc.), the newly defined MDT report, etc.

[0204] The communication method related to the embodiments of the present disclosure can include at least one of steps S201-S202. For example, step S201 can be implemented as an independent embodiment, step S202 can be implemented as an independent embodiment, steps S201+S202 can be implemented as an independent embodiment, but are not limited thereto.

[0205] In some embodiments, step S201 can be exchanged in sequence or executed simultaneously.

[0206] In some embodiments, step S201 is optional, and one or more of the steps can be omitted or replaced in different embodiments.

[0207] In some embodiments, step S202 is optional, and one or more of the steps can be omitted or replaced in different embodiments.

[0208] In some embodiments, other optional implementations described before or after the corresponding description can be referred to. Figure 2

[0209] In a first aspect, the embodiments of the present disclosure propose an information recording method. Figure 3 is a schematic flow chart of an information recording method according to an embodiment of the present disclosure. The information recording method shown in the present embodiment can be executed by a terminal.

[0210] As shown in Figure 3 , the information recording method can include the following steps:

[0211] In step S301, a radio link failure or a handover failure occurs, and layer 1 or layer 2 triggered mobility LTM information is recorded.

[0212] ​It should be noted that Figure 3 The embodiments shown can be implemented independently, or in combination with at least one other embodiment of the present disclosure, which can be selected as needed, and the present disclosure does not limit.

[0213] In some embodiments, the LTM information includes at least one of: a cell identity based on LTM recovery; LTM measurement results of a neighbor cell; LTM information related to the radio link failure; LTM information related to the handover failure; a reestablishment cell identity.

[0214] In some embodiments, the information recording method further includes: sending indication information to a network device, wherein the indication information is used to indicate whether the neighbor cell is an LTM candidate cell.

[0215] In some embodiments, the LTM measurement results include at least one of: L1 measurement results; L3 measurement results.

[0216] In some embodiments, the LTM measurement results of the neighbor cell include LTM measurement results of a first cell, wherein the first cell includes at least one of: a cell in the neighbor cell that satisfies a first condition; a cell in the neighbor cell that does not satisfy the first condition.

[0217] In some embodiments, the first condition includes at least one of: a relationship between an offset of the LTM measurement results of the first cell relative to corresponding measurement results of a second cell and a first threshold value, satisfying a first predefined relationship; a relationship between the LTM measurement results of the first cell and a second threshold value, satisfying a second predefined relationship.

[0218] In some embodiments, the second cell includes at least one of: a current serving cell of the terminal, a cell where the radio link failure occurs, a cell where the handover failure occurs, an LTM candidate cell.

[0219] In some embodiments, the LTM information related to the radio link failure includes at least one of: first time information, wherein the first time information is used to indicate a time interval from receiving an LTM configuration to the radio link failure of the terminal; a type of cell handover performed by the terminal before the radio link failure; information of an LTM candidate cell.

[0220] In some embodiments, the LTM information related to the handover failure includes at least one of: second time information, wherein the second time information is used to indicate a time interval from receiving an LTM configuration to the handover failure of the terminal; a type of cell handover performed by the terminal before the handover failure; information of an LTM candidate cell.

[0221] In some embodiments, the LTM candidate cell does not include the neighbor cell corresponding to the LTM measurement result.

[0222] In some embodiments, the information recording method further includes: sending the LTM information to a network device.

[0223] In some embodiments, the information recording method further includes: sending capability information to the network device, wherein the capability information is used to indicate at least one of the following:

[0224] whether the terminal supports recording LTM information related to radio link failure or handover failure

[0225] whether the terminal sends the LTM information related to radio link failure or handover failure.

[0226] The optional implementation of the first aspect, the optional implementation of the optional embodiment of the first aspect can be seen from Figure 2 The optional implementation of the embodiment shown in the embodiment, and Figure 2 Other related parts in the embodiment involved, here will not be repeated.

[0227] Secondly, the embodiments of the present disclosure propose an information receiving method. Figure 4 It is a schematic flow chart of an information receiving method according to an embodiment of the present disclosure. The information receiving method shown in this embodiment can be executed by a terminal.

[0228] As Figure 4 shown, the information recording method can include the following steps:

[0229] In step S401, the layer 1 or layer 2 triggered mobility LTM information sent by the terminal is received, wherein the LTM information is recorded in the case of radio link failure or handover failure of the terminal.

[0230] It should be noted that, Figure 4 The embodiment shown in the embodiment can be independently implemented, or can be combined with at least one other embodiment of the present disclosure, which can be selected as needed, and the present disclosure does not limit.

[0231] In some embodiments, the LTM information includes at least one of the following: cell identification based on LTM recovery; LTM measurement result of the neighbor cell; LTM information related to the radio link failure; LTM information related to the handover failure; reestablishment cell identification.

[0232] In some embodiments, the information receiving method further includes: receiving the indication information sent by the terminal, wherein the indication information is used to indicate whether the neighbor cell is an LTM candidate cell.

[0233] In some embodiments, the LTM measurement result comprises at least one of: an L1 measurement result; an L3 measurement result.

[0234] In some embodiments, the LTM measurement result of the neighbor cell comprises an LTM measurement result of a first cell, wherein the first cell comprises at least one of: a cell in the neighbor cell satisfying a first condition; a cell in the neighbor cell not satisfying the first condition.

[0235] In some embodiments, the first condition comprises at least one of: a relationship between an offset of the LTM measurement result of the first cell relative to a corresponding measurement result of a second cell and a first threshold value satisfying a first predefined relationship; a relationship between the LTM measurement result of the first cell and a second threshold value satisfying a second predefined relationship.

[0236] In some embodiments, the second cell comprises at least one of: a current serving cell of the terminal, a cell in which the radio link failure occurs, a cell in which the handover failure occurs, an LTM candidate cell.

[0237] In some embodiments, the LTM information related to the radio link failure comprises at least one of: first time information, wherein the first time information is used to indicate a time interval from receiving an LTM configuration to the radio link failure by the terminal; a type of cell handover performed by the terminal before the radio link failure; information of an LTM candidate cell.

[0238] In some embodiments, the LTM information related to the handover failure comprises at least one of: second time information, wherein the second time information is used to indicate a time interval from receiving an LTM configuration to the handover failure by the terminal; a type of cell handover performed by the terminal before the handover failure; information of an LTM candidate cell.

[0239] In some embodiments, the LTM candidate cell does not comprise a neighbor cell corresponding to the LTM measurement result.

[0240] In some embodiments, the information receiving method further comprises: receiving capability information sent by the terminal, wherein the capability information is used to indicate at least one of: whether the terminal supports recording LTM information related to a radio link failure or a handover failure; whether the terminal sends LTM information related to a radio link failure or a handover failure.

[0241] In some embodiments, in the case of consecutive LTM related failures, the terminal can store two RLF related information in the RLF report and report (e.g., send the RLF report to the network device).

[0242] The consecutive LTM related failures can include at least one of:

[0243] A terminal with LTM configuration declares RLF in a source cell. The terminal selects a candidate LTM target cell (i.e. a cell in LTM candidate cells) for connection re-establishment. The terminal fails to re-establish to the selected LTM candidate cell.

[0244] A terminal with LTM configuration performs LTM to a target cell upon meeting a configured condition and experiencing a handover failure. The terminal selects a candidate LTM target cell (i.e. a cell in LTM candidate cells) for connection re-establishment. The terminal fails to re-establish to the selected LTM candidate cell.

[0245] A terminal with LTM configuration performs normal handover (may also be referred to as legacy handover) to a target cell and experiences a handover failure. The terminal selects a configured candidate LTM target cell for connection re-establishment. The UE fails to re-establish to the selected LTM candidate cell using LTM procedure.

[0246] In some embodiments, the LTM related information can include at least one of:

[0247] Time information. For example, time from performing LTM to connection failure; for example, multiplexed timeUntilReconnection (for consecutive LTM failure case, can represent the time from the first failure to reconnection), timeSinceFailure. For example, a first time (e.g. referred to as Time C), can represent the time elapsed between the first time LTM is performed and the corresponding latest LTM configuration received for the selected target cell, can be a newly introduced timer, e.g. timeSinceLTMReconfig. For example, a second time (e.g. referred to as Time D), can be represented by timeConnFailure, which should start at the time of LTM performance and stop at the time of handover failure or radio link failure occurrence.

[0248] Measurements of cells and / or beams related to LMT. For example, source cell of LTM. For example, target cell of LTM performance, e.g. the cell where re-establishment is performed after LTM failure or source RLF.

[0249] Information for distinguishing at least one of normal handover failure, LTM failure, LTM recovery failure.

[0250] The neighbor cell measurement results (measResultNeighCells) in the multiplexed RLF report are included with an indication whether the measured neighbor cell is configured as an LTM candidate cell.

[0251] A list of candidate cell identities.

[0252] An explicit indication is added in the RLF report to indicate whether the last performed handover before the RLF in the target cell was an LTM handover.

[0253] A cell identity. For example, an LTM cell identity to indicate the selected LTM cell between the first connection failure and the connection re-establishment. For example, a cell identity to indicate the cell where the terminal attempts the second re-establishment after the first re-establishment failure after the handover failure or RLF. For example, a first re-establishment cell identity to indicate the cell where the terminal attempts the second re-establishment after the LTM recovery failure after the handover failure or RLF. For example, a second re-establishment cell identity to indicate the cell in the RLF report where the terminal performs the connection re-establishment (e.g. first connection re-establishment) if the cell is not an LTM candidate cell. A failed primary cell identity can be multiplexed to indicate the cell where the first connection failure is detected in case of LTM. A previous primary cell identity to indicate the cell where the handover failure or RLF occurs.

[0254] A cell radio network temporary identity.

[0255] An RLF cause if the first failure is RLF (i.e. not handover failure).

[0256] No suitable cell found.

[0257] An explicit indication is added in the RLF report to indicate whether the performed handover before the RLF in the target cell was an LTM handover.

[0258] In some embodiments, if it is detected that the failure is due to the synchronization failure reconfiguration described in 3GPP protocol 5.3.5.8.3, the fields in the radio link failure report variable (VarRLF-report) are set based on the following way:

[0259] If the terminal supports the RLF report for LTM cell change and the configuration (i.e. LTM configuration) of LTM cell change in the LTM configuration report variable (VarLTM-Config) of the master cell group (MCG) is available at the time of cell change failure:

[0260] If the terminal performs LTM change to the target master cell according to the LTM candidate configuration (ltm-CandidateConfig) of the target master cell:

[0261] timeSinceLTM-Reconfig can be set to the interval between a first operation and a second operation, where the first operation comprises the last RRCReconfiguration message including a reconfigurationWithSync of the target PCell that failed LTM cell change, and the second operation comprises the last LTM configuration received in the source primary cell including LTM candidates of the target PCell that failed LTM cell change;

[0262] Otherwise (i.e. the terminal did not perform LTM change to the target primary cell according to the LTM candidates configuration of the target primary cell): timeSinceLTM-Reconfig can be set to the interval between a third operation and a fourth operation, where the third operation comprises the last RRCReconfiguration message including a reconfigurationWithSync of the target PCell that failed handover, and the second operation comprises the last LTM configuration received in the source primary cell including LTM candidates.

[0263] choCandidateCellList can be set to include the global cell identity if available, otherwise, set to include the physical cell identity and carrier frequency of each candidate target cell of LTM cell handover included in the LTM candidates within the primary cell group LTM configuration variable at handover failure, but not the candidate target cells included in the neighbor cell measurements.

[0264] If the terminal supports RLF reporting for LTM cell change, and the last executed RRCReconfiguration message including reconfigurationWithSync is related to LTM cell change, lastHO-Type can be set to LTM.

[0265] In some embodiments, if it is detected that the failure is due to radio link failure described in 3GPP protocol 5.3.10.3, the fields in the radio link failure report variable (VarRLF-report) are set based on the following ways:

[0266] If an RRCReconfiguration message including reconfigurationWithSync is received before the connection failure:

[0267] If the timer T311 (the specific function can refer to the relevant protocol, which is not described here) is not running before entering the primary cell where RLF is detected:

[0268] If the last executed RRCReconfiguration message containing a synchronization reconfiguration is related to an LTM cell change, set the last handover type to LTM.

[0269] If at the time of declaring radio link failure, LTM cell change configuration is available in the LTM configuration variable of the MCG:

[0270] Set timeSinceLTM-Reconfig to the time interval from detecting RLF to receiving the LTM configuration including the LTM candidate message in the source PCell;

[0271] Set the LTM candidate cell list (ltmCandidateCellList) to include the global cell identity if available, otherwise, set to include the physical cell identity and carrier frequency of each of the candidate target cells in the LTM cell handover included in the LTM candidates within the LTM configuration variable of the MCG at the time of RLF, but not the candidate target cells in the neighbor cell measurements.

[0272] In some embodiments, the names of information and the like are not limited to the names described in the embodiments, and the terms "information", "message", "signal", "signaling", "report", "configuration", "indication", "instruction", "command", "channel", "parameter", "field", "symbol", "symbol", "codebook", "codeword", "code point", "bit", "data", "program", "chip", and the like can be replaced with each other.

[0273] In some embodiments, the terms "synchronization signal (SS)", "synchronization signal block (SSB)", "reference signal (RS)", "pilot", "pilot signal", and the like can be replaced with each other.

[0274] In some embodiments, the terms "moment", "time point", "time", "time position" and the like can be replaced with each other, and the terms "duration", "time period", "time window", "window", "time" and the like can be replaced with each other.

[0275] In some embodiments, the terms "acquire", "obtain", "get", "receive", "transmit", "bidirectional transmission", "send and / or receive" and the like can be replaced with each other, which can be interpreted as receiving from other subjects, acquiring from protocols, acquiring from higher layers, obtaining by self-processing, autonomously implementing and the like.

[0276] In some embodiments, the terms "send", "transmit", "report", "issue", "transmit", "bidirectional transmission", "send and / or receive" and the like can be replaced with each other.

[0277] In some embodiments, the terms "certain", "preset", "preset", "set", "indicated", "certain", "arbitrary", "first" and the like can be replaced with each other, and "certain A", "preset A", "preset A", "set A", "indicated A", "certain A", "arbitrary A", "first A" can be interpreted as A specified in advance in protocols and the like, A obtained by setting, configuration, or indication, and the like, A specified, certain, arbitrary, or first A, but not limited thereto.

[0278] Corresponding to the foregoing embodiments of the information recording method and the information receiving method, the present disclosure also provides embodiments of an information recording device and an information receiving device.

[0279] Figure 5 is a schematic block diagram of an information recording device according to an embodiment of the present disclosure. As shown in Figure 5 The information recording device includes a processing module 501.

[0280] In some embodiments, the processing module is configured to record layer 1 or layer 2 triggered mobility LTM information in response to occurrence of a radio link failure or a handover failure.

[0281] In some embodiments, the LTM information includes at least one of: a cell identity based on LTM recovery; LTM measurement results of a neighbor cell; LTM information related to the radio link failure; LTM information related to the handover failure; and a reestablishment cell identity.

[0282] In some embodiments, the device further includes a sending module configured to send indication information to a network device, wherein the indication information is used to indicate whether the neighbor cell is an LTM candidate cell.

[0283] In some embodiments, the LTM measurement result comprises at least one of: an L1 measurement result; an L3 measurement result.

[0284] In some embodiments, the LTM measurement result of the neighbor cell comprises an LTM measurement result of a first cell, wherein the first cell comprises at least one of: a cell in the neighbor cell satisfying a first condition; a cell in the neighbor cell not satisfying the first condition.

[0285] In some embodiments, the first condition comprises at least one of: a relationship between an offset of the LTM measurement result of the first cell with respect to a corresponding measurement result of a second cell and a first threshold value satisfying a first predefined relationship; a relationship between the LTM measurement result of the first cell and a second threshold value satisfying a second predefined relationship.

[0286] In some embodiments, the second cell comprises at least one of: a current serving cell of the terminal, a cell in which the radio link failure occurs, a cell in which the handover failure occurs, an LTM candidate cell.

[0287] In some embodiments, the LTM information related to the radio link failure comprises at least one of: first time information, wherein the first time information is used to indicate a time interval from receiving an LTM configuration to the radio link failure; a type of cell handover performed by the terminal before the radio link failure; information of an LTM candidate cell.

[0288] In some embodiments, the LTM information related to the handover failure comprises at least one of: second time information, wherein the second time information is used to indicate a time interval from receiving an LTM configuration to the handover failure; a type of cell handover performed by the terminal before the handover failure; information of an LTM candidate cell.

[0289] In some embodiments, the LTM candidate cell does not comprise a neighbor cell corresponding to the LTM measurement result.

[0290] In some embodiments, the apparatus further comprises a sending module configured to send the LTM information to a network device.

[0291] In some embodiments, the apparatus further comprises a sending module configured to send capability information to the network device, wherein the capability information is used to indicate at least one of: whether the terminal supports recording LTM information related to a radio link failure or a handover failure; whether the terminal sends LTM information related to a radio link failure or a handover failure.

[0292] In some embodiments, the information receiving apparatus can be disposed in the terminal, work independently of the modules in the terminal, or work in cooperation with the modules in the terminal.

[0293] Figure 6 is a schematic block diagram of an information receiving apparatus according to an embodiment of the present disclosure. As shown in Figure 6 the information receiving apparatus includes a receiving module 601.

[0294] In some embodiments, the receiving module is configured to receive layer 1 or layer 2 triggered mobility LTM information sent by a terminal, wherein the LTM information is recorded in the case of radio link failure or handover failure of the terminal.

[0295] In some embodiments, the LTM information includes at least one of the following: a cell identifier based on LTM recovery; LTM measurement results of a neighbor cell; LTM information related to the radio link failure; LTM information related to the handover failure; a reestablishment cell identifier.

[0296] In some embodiments, the receiving module is further configured to receive indication information sent by the terminal, wherein the indication information is used to indicate whether the neighbor cell is an LTM candidate cell.

[0297] In some embodiments, the LTM measurement results include at least one of the following: L1 measurement results; L3 measurement results.

[0298] In some embodiments, the LTM measurement results of the neighbor cell include LTM measurement results of a first cell, wherein the first cell includes at least one of the following: a cell in the neighbor cell that satisfies a first condition; a cell in the neighbor cell that does not satisfy the first condition.

[0299] In some embodiments, the first condition includes at least one of the following: a relationship between an offset of the LTM measurement results of the first cell relative to corresponding measurement results of a second cell and a first threshold value satisfies a first predefined relationship; a relationship between the LTM measurement results of the first cell and a second threshold value satisfies a second predefined relationship.

[0300] In some embodiments, the second cell includes at least one of the following: a current serving cell of the terminal, a cell where the radio link failure occurs, a cell where the handover failure occurs, an LTM candidate cell.

[0301] In some embodiments, the LTM information related to the radio link failure comprises at least one of: first time information, wherein the first time information is used to indicate a time interval from receiving the LTM configuration to the radio link failure; a type of cell switching performed by the terminal before the radio link failure; information of an LTM candidate cell.

[0302] In some embodiments, the LTM information related to the handover failure comprises at least one of: second time information, wherein the second time information is used to indicate a time interval from receiving the LTM configuration to the handover failure; a type of cell switching performed by the terminal before the handover failure; information of an LTM candidate cell.

[0303] In some embodiments, the LTM candidate cell does not comprise a neighbor cell corresponding to the LTM measurement result.

[0304] In some embodiments, the receiving module is further configured to receive capability information sent by the terminal, wherein the capability information is used to indicate at least one of: whether the terminal supports recording LTM information related to a radio link failure or a handover failure; whether the terminal sends LTM information related to a radio link failure or a handover failure.

[0305] In some embodiments, the information receiving apparatus can be arranged in a network device, work independently of modules in the network device, or work in cooperation with the modules in the network device.

[0306] For the apparatus embodiment, since it basically corresponds to the method embodiment, the relevant part is described in the part of the method embodiment. The apparatus embodiment described above is merely illustrative, wherein the modules described as separate components can or can not be physically separated, and the components displayed as modules can or can not be physical modules, i.e., can be located in one place or distributed on multiple network modules. Part or all of the modules can be selected to achieve the purpose of the embodiment scheme according to actual needs. Those skilled in the art can understand and implement it without creative labor.

[0307] The embodiments of the present disclosure further propose an apparatus for implementing any of the above methods, for example, an apparatus comprising units or modules for implementing each step performed by the terminal in any of the above methods. For another example, another apparatus is proposed, comprising units or modules for implementing each step performed by the network device (such as an access network device, a core network function node, a core network device, etc.) in any of the above methods.

[0308] It should be understood that the division of each unit or module in the above apparatus is only a logical function division, and all or part of them can be integrated into a physical entity or physically separated in actual implementation. In addition, the units or modules in the apparatus can be implemented in the form of processor calling software: for example, the apparatus includes a processor, the processor is connected with a memory, the memory stores instructions, and the processor calls the instructions stored in the memory to realize any of the above methods or realize the functions of each unit or module of the above apparatus, wherein the processor is a general processor such as a central processing unit (CPU) or a microprocessor, and the memory is a memory in the apparatus or a memory outside the apparatus. Alternatively, the units or modules in the apparatus can be implemented in the form of hardware circuit, and the functions of part or all of the units or modules can be realized by the design of hardware circuit. The above hardware circuit can be understood as one or more processors; for example, in one implementation, the above hardware circuit is an application-specific integrated circuit (ASIC), and the functions of part or all of the units or modules are realized by the design of the logical relationship of elements in the circuit; for another example, in another implementation, the above hardware circuit is a programmable logic device (PLD), and a field programmable gate array (FPGA) is taken as an example, which can include a large number of logic gate circuits, and the connection relationship between the logic gate circuits is configured by a configuration file, so as to realize the functions of part or all of the above units or modules. All units or modules of the above apparatus can be all implemented in the form of processor calling software, or all implemented in the form of hardware circuit, or part implemented in the form of processor calling software and the remaining part implemented in the form of hardware circuit.

[0309] In the embodiments of the present disclosure, the processor is a circuit with signal processing capability. In one implementation, the processor can be a circuit with instruction reading and running capability, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a microprocessor), a digital signal processor (DSP), and the like. In another implementation, the processor can implement certain functions through a logical relationship of hardware circuit. The logical relationship of the above hardware circuit is fixed or can be reconfigured. For example, the processor is a hardware circuit implemented by an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In the reconfigurable hardware circuit, the processor loads a configuration document to implement the hardware circuit configuration. It can be understood that the processor loads instructions to implement the functions of the above part or all units or modules. In addition, it can also be a hardware circuit designed for artificial intelligence, which can be understood as an ASIC, such as a neural network processing unit (NPU), a tensor processing unit (TPU), a deep learning processing unit (DPU), and the like.

[0310] Figure 7A FIG. 7 is a structural schematic diagram of a communication device 7100 according to an embodiment of the present disclosure. The communication device 7100 can be a network device (for example, an access network device, a core network device, and the like), can also be a terminal (for example, a user equipment, and the like), can also be a chip, a chip system, or a processor supporting the network device to implement any of the above methods, and can also be a chip, a chip system, or a processor supporting the terminal to implement any of the above methods. The communication device 7100 can be used to implement the methods described in the above method embodiments, and details can be referred to the descriptions in the above method embodiments.

[0311] As Figure 7AAs shown, the communication device 7100 includes one or more processors 7101. The processor 7101 can be a general processor or a special purpose processor, etc., for example, a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, the central processing unit can be used to control the communication device (e.g., a base station, a baseband chip, a terminal device, a terminal device chip, a DU or a CU, etc.), execute programs, and process data of the programs. Optionally, the communication device 7100 is configured to perform any of the above methods. Optionally, the one or more processors 7101 are configured to invoke instructions to cause the communication device 7100 to perform any of the above methods.

[0312] In some embodiments, the communication device 7100 further includes one or more transceivers 7102. When the communication device 7100 includes one or more transceivers 7102, the transceiver 7102 performs at least one of the communication steps (e.g., steps S201, S202, but not limited to) in the above methods, and the processor 7101 performs at least one of the other steps (e.g., steps S201, S202, but not limited to). In optional embodiments, the transceiver can include a receiver and / or a transmitter, which can be separate or integrated together. Optionally, the terms transceiver, transceiving unit, transceiver, transceiving circuit, interface circuit, interface, etc. can be replaced by each other, the terms transmitter, transmitting unit, transmitter, transmitting circuit, etc. can be replaced by each other, and the terms receiver, receiving unit, receiver, receiving circuit, etc. can be replaced by each other.

[0313] In some embodiments, the communication device 7100 further includes one or more memories 7103 for storing data. Optionally, all or part of the memory 7103 can also be outside the communication device 7100. In optional embodiments, the communication device 7100 can include one or more interface circuits 7104. Optionally, the interface circuit 7104 is connected to the memory 7102, and the interface circuit 7104 can be used to receive data from the memory 7102 or other devices, and can be used to send data to the memory 7102 or other devices. For example, the interface circuit 7104 can read data stored in the memory 7102 and send the data to the processor 7101.

[0314] The communication device 7100 in the above embodiments can be a network device or a terminal, but the scope of the communication device 7100 described in the present disclosure is not limited thereto, and the structure of the communication device 7100 can not be limited to Figure 7AThe communication device can be a stand-alone device or can be a part of a larger device. For example, the communication device can be: 1) a stand-alone integrated circuit (IC), or chip, or chip system or subsystem; (2) a set of one or more ICs, optionally including memory storage for storing data and programs; (3) an ASIC such as a modem; (4) a module that can be embedded within other devices; (5) a receiver, terminal device, smart terminal device, cellular telephone, wireless device, handset, mobile unit, vehicular device, network device, cloud device, artificial intelligence device, etc.; (6) other; etc.

[0315] Figure 7B FIG. 7 shows a structure diagram of a chip 7200 according to some embodiments of the present disclosure. For the case that the communication device 7100 is a chip or chip system, the structure diagram of the chip 7200 shown in FIG. 7 can be referred to, but is not limited thereto. Figure 7B

[0316] The chip 7200 includes one or more processors 7201. The chip 7200 is configured to perform any of the above methods.

[0317] In some embodiments, the chip 7200 further includes one or more interface circuits 7202. Optionally, the terms interface circuit, interface, transceiver pin, etc. can be replaced by each other. In some embodiments, the chip 7200 further includes one or more memories 7203 for storing data. Optionally, all or part of the memory 7203 can be outside the chip 7200. Optionally, the interface circuit 7202 is connected with the memory 7203, and the interface circuit 7202 can be configured to receive data from the memory 7203 or other devices, and the interface circuit 7202 can be configured to send data to the memory 7203 or other devices. For example, the interface circuit 7202 can read data stored in the memory 7203 and send the data to the processor 7201.

[0318] In some embodiments, the interface circuit 7202 performs at least one of the communication steps (such as steps S201, S202, but not limited thereto) of transmitting and / or receiving in the above methods. The interface circuit 7202 performing the communication steps such as transmitting and / or receiving in the above methods means that the interface circuit 7202 performs data interaction between the processor 7201, the chip 7200, the memory 7203 or the transceiver device. In some embodiments, the processor 7201 performs at least one of the other steps (such as steps S201, S202, but not limited thereto).

[0319] ​The modules and / or devices described in various embodiments of the virtual device, the physical device, the chip, etc. can be combined or separated according to circumstances. Alternatively, part or all of the steps can also be performed by multiple modules and / or devices in cooperation, which is not limited here.

[0320] The disclosure further provides a storage medium having instructions stored thereon, which, when executed on the communication device 7100, causes the communication device 7100 to perform any of the above methods. Alternatively, the storage medium is an electronic storage medium. Alternatively, the storage medium is a computer readable storage medium, but is not limited to this, and it can also be a storage medium readable by other devices. Alternatively, the storage medium can be a non-transitory storage medium, but is not limited to this, and it can also be a transitory storage medium.

[0321] The disclosure further provides a program product, which, when executed by the communication device 7100, causes the communication device 7100 to perform any of the above methods. Alternatively, the program product is a computer program product.

[0322] The disclosure further provides a computer program, which, when executed on a computer, causes the computer to perform any of the above methods.

Claims

1. An information recording method, characterized by, The method is performed by a terminal, and the method comprises: receiving an LTM configuration sent by a network device; in a case where a radio link failure or a handover failure occurs at the terminal, recording layer 1 or layer 2 triggered mobility LTM information; wherein a type of cell handover performed by the terminal comprises at least one of the following: a traditional handover; a conditional handover CHO; a dual active protocol stack DAPS handover; sending the LTM information to the network device; wherein the LTM information comprises LTM information related to the radio link failure, and the LTM information related to the radio link failure comprises at least one of the following: first time information, wherein the first time information is used to indicate a time interval from receiving the LTM configuration to the radio link failure by the terminal; a type of cell handover performed by the terminal before the radio link failure; information of an LTM candidate cell; the method further comprises: sending capability information to the network device, wherein the capability information is used to indicate at least one of the following: whether the terminal supports recording LTM information related to a radio link failure or a handover failure; whether the terminal sends the LTM information related to the radio link failure or the handover failure.

2. The method of claim 1, wherein, the LTM information further comprises at least one of the following: a cell identifier based on LTM recovery; LTM measurement results of a neighbor cell; LTM information related to the handover failure; a reestablished cell identifier.

3. The method of claim 2, wherein, the method further comprises: sending indication information to the network device, wherein the indication information is used to indicate whether the neighbor cell is an LTM candidate cell.

4. The method of claim 2, wherein, the LTM measurement results comprise at least one of the following: L1 measurement results; L3 measurement results.

5. The method of claim 2, wherein, the LTM measurement results of the neighbor cell comprise LTM measurement results of a first cell, wherein the first cell comprises at least one of the following: a cell in the neighbor cell that satisfies a first condition.

6. The method of claim 5, wherein, the first condition comprises at least one of the following: a relationship between an offset of the LTM measurement results of the first cell relative to corresponding measurement results of a second cell and a first threshold value satisfies a first predefined relationship; a relationship between the LTM measurement results of the first cell and a second threshold value satisfies a second predefined relationship.

7. The method of claim 6, wherein, the second cell comprises at least one of the following: a current serving cell of the terminal, a cell where the radio link failure occurs, a cell where the handover failure occurs, an LTM candidate cell.

8. The method of claim 2, wherein, the LTM information related to the handover failure comprises at least one of the following: second time information, wherein the second time information is used to indicate a time interval from receiving the LTM configuration to the handover failure by the terminal; a type of cell handover performed by the terminal before the handover failure; information of an LTM candidate cell.

9. The method of claim 1, wherein, the LTM candidate cell does not comprise a neighbor cell corresponding to the LTM measurement results.

10. An information receiving method characterized by comprising: The method is performed by a network device, and the method comprises: sending an LTM configuration to a terminal; receive layer 1 or layer 2 triggered mobility LTM information sent by the terminal, wherein the LTM information is recorded in a case where the terminal has a radio link failure or a handover failure; and wherein a type of cell handover performed by the terminal includes at least one of the following: a legacy handover; a conditional handover CHO; a dual active protocol stack DAPS handover; the LTM information includes LTM information related to the radio link failure, and the LTM information related to the radio link failure includes at least one of the following: first time information, wherein the first time information is used to indicate a time interval from receiving an LTM configuration to the radio link failure of the terminal; a type of cell handover performed by the terminal before the radio link failure; information of an LTM candidate cell; the method further includes: receiving capability information sent by the terminal, wherein the capability information is used to indicate at least one of the following: whether the terminal supports recording LTM information related to a radio link failure or a handover failure; whether the terminal sends the LTM information related to the radio link failure or the handover failure.

11. The method of claim 10, wherein, the LTM information further includes at least one of the following: a cell identifier based on LTM recovery; an LTM measurement result of a neighbor cell; LTM information related to the handover failure; a reestablishment cell identifier.

12. The method of claim 11, wherein, the method further includes: receiving indication information sent by the terminal, wherein the indication information is used to indicate whether the neighbor cell is an LTM candidate cell.

13. The method of claim 11, wherein, the LTM measurement result includes at least one of the following: an L1 measurement result; an L3 measurement result.

14. The method of claim 11, wherein, the LTM measurement result of the neighbor cell includes an LTM measurement result of a first cell, and the first cell includes at least one of the following: a cell in the neighbor cell that satisfies a first condition.

15. The method of claim 14, wherein, the first condition includes at least one of the following: a relationship between an offset of the LTM measurement result of the first cell relative to a measurement result corresponding to a second cell and a first threshold value satisfies a first predefined relationship; a relationship between the LTM measurement result of the first cell and a second threshold value satisfies a second predefined relationship.

16. The method of claim 15, wherein, the second cell includes at least one of the following: a current serving cell of the terminal, a cell where the radio link failure occurs, a cell where the handover failure occurs, and an LTM candidate cell.

17. The method of claim 11, wherein, the LTM information related to the handover failure includes at least one of the following: second time information, wherein the second time information is used to indicate a time interval from receiving an LTM configuration to the handover failure of the terminal; a type of cell handover performed by the terminal before the handover failure; information of an LTM candidate cell.

18. The method of claim 10, wherein, the LTM candidate cell does not include a neighbor cell corresponding to the LTM measurement result.

19. An information recording apparatus, characterized by comprising: the apparatus includes: a receiving module configured to receive an LTM configuration sent by a network device; a processing module configured to record layer 1 or layer 2 triggered mobility LTM information in a case where a terminal has a radio link failure or a handover failure; and wherein a type of cell handover performed by the terminal includes at least one of the following: a legacy handover; a conditional handover CHO; a dual active protocol stack DAPS handover; The sending module is configured to send the LTM information to the network device; and send capability information to the network device, wherein the capability information is used to indicate at least one of the following: whether the terminal supports recording LTM information related to radio link failure or handover failure; whether the terminal sends the LTM information related to radio link failure or handover failure; The LTM information includes LTM information related to the radio link failure, and the LTM information related to the radio link failure includes at least one of the following: first time information, wherein the first time information is used to indicate a time interval from when the terminal receives LTM configuration to the radio link failure; a type of cell handover performed by the terminal before the radio link failure; information of an LTM candidate cell.

20. An information receiving apparatus comprising: The apparatus comprises: a sending module configured to send LTM configuration to a terminal; a receiving module configured to receive layer 1 or layer 2 triggered mobility LTM information sent by the terminal, wherein the LTM information is recorded in the case of radio link failure or handover failure of the terminal; and wherein the type of cell handover performed by the terminal includes at least one of the following: traditional handover; conditional handover CHO; dual active protocol stack DAPS handover. The receiving module is further configured to receive capability information sent by the terminal, wherein the capability information is used to indicate at least one of the following: whether the terminal supports recording LTM information related to radio link failure or handover failure; whether the terminal sends the LTM information related to radio link failure or handover failure; The LTM information includes LTM information related to the radio link failure, and the LTM information related to the radio link failure includes at least one of the following: first time information, wherein the first time information is used to indicate a time interval from when the terminal receives LTM configuration to the radio link failure; a type of cell handover performed by the terminal before the radio link failure; information of an LTM candidate cell.

21. A terminal, characterized by comprise: one or more processors; The terminal is configured to perform the information recording method of any one of claims 1 to 9.

22. A network device, comprising: comprise: one or more processors; The network device is configured to perform the information receiving method of any one of claims 10 to 18.

23. A communication system, characterized by The terminal and the network device are configured to implement the information recording method of any one of claims 1 to 9 and the information receiving method of any one of claims 10 to 18.

24. A storage medium, the storage medium storing instructions, wherein, When the instructions run on a communication device, the communication device is caused to perform the information recording method of any one of claims 1 to 9 and / or the information receiving method of any one of claims 10 to 18.

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