Information Processing Method, Apparatus, Terminal and Network-Side Device for Voice Fallback

Abstract

The present disclosure discloses an information processing method, apparatus, terminal, and network-side device for voice fallback. In the method, the terminal fails to access a first target network-side device and records first related information of the access failure, where the first target network-side device is a network device that requests access when the terminal performs inter-system voice fallback, and the terminal sends the first related information to a second target network-side device, where the second target network-side device is a network device that succeeds in access after the terminal fails to access the first target network-side device.

Description

Technical Field

[0001] (Cross-reference to Related Applications) This disclosure claims priority based on a Chinese patent application with application number 202210578928.2 filed in China on May 25, 2022, and all of its contents are incorporated herein by reference. This disclosure relates to the field of communication technologies, and particularly to an information processing method, apparatus, terminal, and network-side device for voice fallback.

Background Art

[0002] Mobility Robustness Optimisation (MRO) mainly solves the failure problems during the mobility process of a terminal, assists in the optimization of the network, and the MRO feature is mainly used to discover and solve parameter configuration problems during the mobility process. And three types of failure types are defined: switching is too fast, switching is too slow, and switching to an error cell.

[0003] The current Non-Access Stratum (NAS) signaling inter-system handover report only includes the types of switching too fast and unnecessary switching, and does not include the type of switching to an error cell. Therefore, the signaling indication method in the network switching process related to the related art is not applicable to the scenario of switching to an error cell in voice fallback services.

Summary of the Invention

[0004] An object of this disclosure is to provide an information processing method, apparatus, terminal, and network-side device for voice fallback to solve the problem that the signaling indication method in the network switching process related to the related art is not applicable to the scenario of switching to an error cell in voice fallback services.

[0005] Embodiments of the present disclosure provide a method for processing voice fallback information. The method includes: The terminal fails to access the first target network-side device and records first related information of the access failure, where the first target network-side device is a network device that requests access when the terminal performs inter-system voice fallback; The terminal sends the first related information to a second target network-side device, where the second target network-side device is a network device that successfully accesses after the terminal fails to access the first target network-side device.

[0006] Optionally, the terminal fails to access the first target network-side device, including one of the following: The terminal successfully switches from the source network-side device to the first target network-side device, and a radio link failure (RLF) occurs within a first time period; After the terminal releases the radio resource control (RRC) connection with the source network-side device and enters the idle state, it successfully redirects to the first target network-side device, and an RLF occurs within a first time period; A switching failure occurs during the process of the terminal switching from the source network-side device to the first target network-side device; After the terminal releases the RRC connection with the source network-side device and enters the idle state, a failure occurs during the process of starting a random access to the first target network-side device. Here, the source network-side device is a network-side device accessed by the terminal before performing inter-system voice fallback.

[0007] Optionally, the first related information includes: An identifier of the first target network-side device; The identifier of the source network device accessed by the terminal before performing inter-system voice fallback, and The identifier of the second target network device, and The carrier information of the first target network device, and The priority of the first target network device, and At least one of the voice fallback instruction information.

[0008] Optionally, recording the first related information of the access failure includes Recording the first related information of the access failure according to a specified encoding format, where the specified encoding format includes The network encoding format corresponding to the mobile communication system to which the source network device accessed by the terminal before performing inter-system voice fallback belongs, and The network encoding format corresponding to the mobile communication system to which the first target network device belongs, and One of the network encoding formats corresponding to the mobile communication system to which the second target network device belongs.

[0009] Optionally, the method further includes Receiving a handover command or an RRC release instruction with voice fallback instruction information attached, and Based on the handover command or the RRC release instruction, accessing the first target network device from the source network device currently being accessed.

[0010] Embodiments of the present disclosure provide a method for network optimization of voice fallback. The method includes The source network side device receives first related information on access failure by a terminal transmitted from the target network side device, where the first related information is related information recorded when the terminal executes inter-system voice fallback and an access failure occurs. The source network side device network-optimizes related parameters of voice fallback based on the first related information.

[0011] Optionally, the source network side device receiving first related information on access failure by a terminal transmitted from the target network side device includes: The source network side device receives second related information transmitted from a second target network side device, where the second related information includes the first related information, and / or the source network side device receives third related information transmitted from a first target network side device, where the third related information includes the first related information. Here, the first target network side device is a network device that requests access when the terminal executes inter-system voice fallback, and the second target network side device is a network device that succeeds in access after the terminal fails to access the first target network side device.

[0012] Optionally, the second related information and / or the third related information further includes indication information that the failure type is to switch to an error cell. The source network side device network-optimizing related parameters of voice fallback based on the first related information includes: Analyzing the second related information and / or the third related information and determining that the failure type of the access failure is to switch to an error cell. Network-optimizing related parameters of voice fallback based on the first related information. The optimized network parameters are used to preferentially switch the terminal to other network-side devices other than the first target network-side device when performing inter-system voice fallback.

[0013] Optionally, the second related information and / or the third related information further includes indication information that the failure type is an inter-system mobility failure due to voice fallback. The source network-side device optimizing the related parameters of voice fallback based on the first related information includes: analyzing the second related information and / or the third related information to determine that the failure type of the access failure is an inter-system mobility failure due to voice fallback; optimizing the related parameters of voice fallback based on the first related information, and includes: The optimized network parameters are used to preferentially switch the terminal to other network-side devices other than the first target network-side device when performing inter-system voice fallback.

[0014] Optionally, the first related information includes: the identifier of the first target network-side device; the identifier of the source network-side device; the identifier of the second target network-side device; the carrier information of the first target network-side device; the priority of the first target network-side device; and at least one of voice fallback indication information.

[0015] Embodiments of the present disclosure provide a method for processing voice fallback information, and the method includes: The second target network side device receives first related information transmitted from the terminal, where the first related information is related information recorded when the terminal executes inter-system voice fallback and an access failure occurs. The second target network side device transmits second related information about the access failure by the terminal to the source network side device that the terminal accessed before executing inter-system voice fallback based on the first related information, where the second related information includes the first related information, and at least one of the second target network side device transmitting the first related information to the first target network side device. Here, the first target network side device is a network device that requests access when the terminal executes inter-system voice fallback.

[0016] Optionally, transmitting second related information about the access failure by the terminal to the source network side device that the terminal accessed before executing inter-system voice fallback based on the first related information includes: Analyzing the first related information and determining that the failure type of the access failure by the terminal is to switch to an error cell. Transmitting the second related information to the source network side device, where the second related information includes indication information that the failure type is to switch to an error cell.

[0017] Optionally, transmitting second related information about the access failure by the terminal to the source network side device that the terminal accessed before executing inter-system voice fallback based on the first related information includes: Analyzing the first related information and determining that the failure type of the access failure by the terminal is an inter-system mobility failure due to voice fallback. Transmitting the second related information to the source network side device, where the second related information includes instruction information indicating that the failure type is an inter-system mobility failure due to voice fallback.

[0018] Optionally, based on the first related information, the terminal may transmit second related information about the access failure to the source network side device that the terminal accessed before performing inter-system voice fallback. This includes transmitting the second related information to the source network side device that the terminal accessed before performing inter-system voice fallback via a first interface.

[0019] Optionally, transmitting the first related information to the first target network side device includes transmitting a failure instruction included in the first related information to the first target network side device.

[0020] Embodiments of the present disclosure provide a method for information processing of voice fallback. The method includes: The first target network side device receives first related information transmitted from the second target network side device, where the first related information is related information recorded when an access failure occurs when the terminal performs inter-system voice fallback. Based on the first related information, the first target network side device transmits third related information about the access failure by the terminal to the source network side device that the terminal accessed before performing inter-system voice fallback, where the third related information includes the first related information. Here, the second target network side device is a network device that successfully accesses after the terminal fails to access the first target network side device.

[0021] Optionally, based on the first related information, before the terminal executes inter-system voice fallback, the terminal sends third related information about access failure to the source network side device that the terminal accessed. This is analyzing the first related information and determining that the failure type of the access failure by the terminal is to switch to an error cell; and sending the third related information to the source network side device, where the third related information includes indication information that the failure type is to switch to an error cell.

[0022] Optionally, based on the first related information, before the terminal executes inter-system voice fallback, the terminal sends third related information about access failure to the source network side device that the terminal accessed. This is analyzing the first related information and determining that the failure type of the access failure by the terminal is an inter-system mobility failure due to voice fallback; and sending the third related information to the source network side device, where the third related information includes indication information that the failure type is an inter-system mobility failure due to voice fallback.

[0023] Optionally, receiving the first related information sent from the second target network side device includes receiving a failure indication sent from the second target network side device, where the failure indication includes the first related information.

[0024] Embodiments of the present disclosure provide a terminal including a memory, a transceiver, and a processor. The memory is used to store a computer program, and the transceiver is used to transmit and receive data under the control of the processor. The processor reads out the computer program in the memory and It is used to execute the terminal's failure to access the first target network side device and record the first related information of the access failure. The first target network side device is a network device that requests access when the terminal executes inter-system voice fallback. The transceiver is used to transmit the first related information to the second target network side device. The second target network side device is a network device that succeeds in accessing after the terminal fails to access the first target network side device.

[0025] Optionally, the terminal's failure to access the first target network side device includes one of the following: the terminal successfully switches from the source network side device to the first target network side device and a radio link failure (RLF) occurs within the first time duration; after the terminal releases the radio resource control (RRC) connection with the source network side device and enters the idle state, it successfully redirects to the first target network side device and an RLF occurs within the first time duration; a switching failure occurs during the process of the terminal switching from the source network side device to the first target network side device; after the terminal releases the RRC connection with the source network side device and enters the idle state, a failure occurs during the process of starting a random access to the first target network side device. Here, the source network side device is the network side device that the terminal accessed before executing inter-system voice fallback.

[0026] Optionally, the first related information includes the identifier of the first target network side device and the identifier of the source network side device that the terminal accessed before executing inter-system voice fallback. The identifier of the second target network side device, and the carrier information of the first target network side device, and the priority of the first target network side device, and at least one of the voice fallback indication information. Optionally, the processor is further configured to read out the computer program in the memory and used to record the first related information of access failure according to a specified encoding format, wherein the specified encoding format is the network encoding format corresponding to the mobile communication system to which the source network side device accessed by the terminal before performing inter-system voice fallback belongs, and the network encoding format corresponding to the mobile communication system to which the first target network side device belongs, and one of the network encoding formats corresponding to the mobile communication system to which the second target network side device belongs.

[0027] Optionally, the transceiver is further configured to receive a switching command or a radio resource control (RRC) release indication with voice fallback indication information attached, the processor reads out the computer program in the memory, and used to perform access from the currently accessed source network side device to the first target network side device based on the switching command or the RRC release indication.

[0028] Embodiments of the present disclosure provide a network side device including a memory, a transceiver, and a processor, the memory is used to store a computer program, the processor is used to read out the computer program in the memory, the transceiver transmits and receives data under the control of the processor, and It is used to execute receiving first related information of access failure by a terminal transmitted from a target network side device, The first related information is related information recorded when the terminal executes inter-system voice fallback and an access failure occurs, The processor reads out a computer program in the memory, and Based on the first related information, it is used to execute network optimization of related parameters of voice fallback.

[0029] Specifically, the transceiver transmits and receives data under the control of the processor, and Receiving second related information transmitted from a second target network side device, where the second related information includes the first related information, and / or receiving third related information transmitted from a first target network side device, where the third related information includes the first related information, is used to execute, Here, the first target network side device is a network device that requests access when the terminal executes inter-system voice fallback, and the second target network side device is a network device that succeeds in access after the terminal fails to access the first target network side device.

[0030] Optionally, the second related information and / or the third related information further includes indication information that the failure type is to switch to an error cell, Specifically, the processor reads out a computer program in the memory, and Analyzing the second related information and / or the third related information, and determining that the failure type of the access failure is to switch to an error cell, Based on the first related information, performing network optimization of related parameters of voice fallback, is used to execute, The optimized network parameters are used to preferentially switch the terminal to other network-side devices other than the first target network-side device when performing inter-system voice fallback.

[0031] Optionally, the second related information and / or the third related information further includes indication information that the failure type is an inter-system mobility failure due to voice fallback. Specifically, the processor reads out the computer program in the memory and analyzes the second related information and / or the third related information to determine that the failure type of the access failure is an inter-system mobility failure due to voice fallback, and is used to perform network optimization of the related parameters of voice fallback based on the first related information. The optimized network parameters are used to preferentially switch the terminal to other network-side devices other than the first target network-side device when performing inter-system voice fallback.

[0032] Optionally, the first related information includes at least one of the identifier of the first target network-side device, the identifier of the source network-side device, the identifier of the second target network-side device, the carrier information of the first target network-side device, the priority of the first target network-side device, and voice fallback indication information.

[0033] Embodiments of the present disclosure provide a network-side device including a memory, a transceiver, and a processor, wherein the memory is used to store a computer program, and the processor is used to read out the computer program in the memory. The transceiver transmits and receives data under the control of the processor, and receives first related information transmitted from the terminal, where the first related information is related information recorded when the terminal executes inter-system voice fallback and an access failure occurs, based on the first related information, transmits second related information of the access failure by the terminal to the source network side device accessed before the terminal executes inter-system voice fallback, where the second related information includes the first related information and is used to execute at least one of transmitting the first related information to the first target network side device, Here, the first target network side device is a network device that requests access when the terminal executes inter-system voice fallback.

[0034] Optionally, the processor reads out the computer program in the memory and analyzes the first related information and is used to execute determining that the failure type of the access failure by the terminal switches to an error cell. The transceiver transmits and receives data under the control of the processor, and transmits the second related information to the source network side device, where the second related information is used to execute including indication information that the failure type switches to an error cell.

[0035] Optionally, the processor reads out the computer program in the memory and analyzes the first related information and is used to execute determining that the failure type of the access failure by the terminal is an inter-system mobility failure due to voice fallback. The transceiver further To transmit the second related information to the source network side device, where the second related information is used to execute the inclusion of instruction information indicating that the failure type is an inter-system mobility failure due to voice fallback.

[0036] Optionally, the transceiver is further used to transmit the second related information to the source network side device accessed by the terminal via the first interface before the terminal executes inter-system voice fallback.

[0037] Optionally, the transceiver is further used to transmit a failure indication including the first related information to the first target network side device.

[0038] Embodiments of the present disclosure provide a network side device including a memory, a transceiver, and a processor. The memory is used to store a computer program, and the processor is used to read the computer program in the memory. The transceiver transmits and receives data under the control of the processor, and receives first related information transmitted from a second target network side device, where the first related information is related information recorded when an access failure occurs when the terminal executes inter-system voice fallback. Based on the first related information, to transmit third related information about the access failure by the terminal to the source network side device accessed by the terminal before the terminal executes inter-system voice fallback, where the third related information includes the first related information. Here, the second target network side device is a network device that successfully accesses after the terminal fails to access the first target network side device.

[0039] Optionally, the processor reads the computer program in the memory and is used to analyze the first related information and execute the determination that the failure type of the access failure by the terminal is to switch to an error cell. The transceiver further is used to execute transmitting the third related information to the source network side device, where the third related information includes indication information that the failure type is to switch to an error cell.

[0040] Optionally, the processor reads the computer program in the memory and is used to analyze the first related information and execute the determination that the failure type of the access failure by the terminal is an inter-system mobility failure due to voice fallback. The transceiver further is used to execute transmitting the third related information to the source network side device, where the third related information includes indication information that the failure type is an inter-system mobility failure due to voice fallback.

[0041] Optionally, the transceiver further is used to execute receiving a failure indication transmitted from a second target network side device, where the failure indication includes the first related information.

[0042] Embodiments of the present disclosure provide an information processing apparatus for voice fallback, the apparatus including a recording unit configured to record the first related information of the access failure when the terminal fails to access the first target network side device, where the first target network side device is a network device that requests access when the terminal executes inter-system voice fallback. A first transmission unit configured to transmit the first related information to a second target network side device, where the second target network side device is a network device that succeeds in accessing after the terminal fails to access the first target network side device, and the first transmission unit is included.

[0043] Embodiments of the present disclosure provide a network optimization device for voice fallback, and the device includes A first reception unit configured to receive first related information of access failure by a terminal transmitted from a target network side device, where the first related information is related information recorded when the terminal executes inter-system voice fallback and access failure occurs, and the first reception unit is included. A processing unit configured to optimize related parameters of voice fallback based on the first related information, and the processing unit is included.

[0044] Embodiments of the present disclosure provide an information processing device for voice fallback, and the device includes A second reception unit configured to receive first related information transmitted from a terminal, where the first related information is related information recorded when the terminal executes inter-system voice fallback and access failure occurs, and the second reception unit is included. A second transmission unit configured to execute at least one of transmitting second related information of access failure by the terminal to a source network side device accessed by the terminal before executing inter-system voice fallback based on the first related information, where the second related information includes the first related information, and transmitting the first related information to a first target network side device, and the second transmission unit is included. Here, the first target network side device is a network device that requests access when the terminal executes inter-system voice fallback.

[0045] Embodiments of the present disclosure provide an information processing device for voice fallback, and the device includes A third receiving unit configured to receive first related information transmitted from a second target network side device, where the first related information is related information recorded when a terminal executes inter-system voice fallback and an access failure occurs, and the third receiving unit; A third transmitting unit configured to transmit third related information of an access failure by the terminal to a source network side device accessed by the terminal before the terminal executes inter-system voice fallback based on the first related information, where the third related information includes the first related information, and the third transmitting unit; Here, the second target network side device is a network device that succeeds in accessing after the terminal fails to access the first target network side device.

[0046] Embodiments of the present disclosure provide a processor-readable storage medium storing a computer program, and when the computer program is executed by a processor, the steps of the above voice fallback information processing method are realized, or the steps of the above voice fallback network optimization method are realized.

[0047] The above technical solution of the present disclosure has the following beneficial effects.

[0048] According to an embodiment of the present disclosure, when a terminal executes inter-system voice fallback, it requests access to a first target network side device, records first related information when the access to the first target network side device fails, and the terminal transmits the first related information to a second target network side device that has succeeded in accessing, so that the network side device can perform network optimization of voice fallback based on the first related information.

Brief Description of the Drawings

[0049]

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Embodiments for Carrying Out the Invention

[0050] In order to make the technical problems to be solved, technical solutions and advantages according to the present disclosure clearer, the following will be described in detail with reference to the drawings and specific embodiments. In the following description, the details of specific configurations, components, etc. are described for the purpose of facilitating the understanding of the present disclosure. Therefore, it will be apparent to those skilled in the art that various changes and modifications to the embodiments described herein can be made without departing from the scope and spirit of the present disclosure. Note that known functions and configurations are omitted for clarity and conciseness.

[0051] It should be understood that the "one embodiment" or "an embodiment" referred to throughout the specification means that the specific features, structures, or characteristics related to that embodiment are included in at least one embodiment of the present disclosure. Therefore, the "in one embodiment" or "in an embodiment" that appears in various places throughout this specification is not necessarily the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable way in one or more embodiments.

[0052] In various embodiments of the present disclosure, the numbers of the following respective processes do not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and does not constitute any limitation to the implementation process of the embodiments of the present disclosure.

[0053] The term "and / or" in the embodiments of the present disclosure describes the relationship of related objects and indicates that there are three types of relationships. For example, A and / or B can indicate three situations: the situation where A exists alone, the situation where A and B exist simultaneously, and the situation where B exists alone. " / " generally indicates that the related objects before and after are in an "or" relationship.

[0054] The term "plurality" in the embodiments of the present disclosure refers to two or more, and other quantifiers are similar to it.

[0055] The following refers to the drawings in the embodiments of the present disclosure to clearly and completely explain the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only some of the embodiments of the present disclosure, not all of them. Based on the embodiments of the present disclosure, all other embodiments obtained on the premise that those skilled in the art do not perform creative labor belong to the protection scope of the present disclosure.

[0056] Specifically, an embodiment of the present disclosure provides an information processing method for voice fallback to solve the problem that the signaling indication method in the network switching process related to the related art is not applicable to the scenario of switching to an error cell in a voice fallback service or the scenario of inter-system mobility failure due to voice fallback.

[0057] The above-mentioned switching to the error cell or the inter-system mobility failure due to voice fallback means that the terminal fails to access the target cell during the switching process, or although the access to the target cell is successful, a radio link failure occurs immediately, and the terminal starts to re-establish the RRC connection and attempts to access another cell different from the target cell or the source cell of the switching.

[0058] As shown in FIG. 1, an embodiment of the present disclosure provides an information processing method for voice fallback applied to a terminal, and the method specifically includes the following steps 101 to 102.

[0059] In step 101, the terminal fails to access the first target network-side device, records the first related information of the access failure, and the first target network-side device is a network device that requests access when the terminal performs inter-system voice fallback.

[0060] The inter-system voice fallback means the inter-system fallback due to a voice service. For example, when the terminal is accessing a 5G communication system (that is, accessing a 5G base station) and a call service causes an inter-system fallback, the 5G base station switches the terminal to a 2G / 3G / 4G base station, or first, the 5G base station releases the terminal to the idle state, and then the terminal accesses the 2G / 3G / 4G base station to achieve the inter-system fallback.

[0061] The failure of the terminal to access the first target network side device can mean that the terminal fails to access the first target network side device from the source network side device that the terminal is currently accessing. The source network side device can be the source base station that the terminal accessed before executing the inter-system voice fallback. The first target network side device can be the target base station that the terminal requests access to when executing the inter-system voice fallback. When the terminal fails to access the target base station from the source base station, the terminal records the first related information of the access failure. Optionally, the terminal recording the first related information may include recording the related information of the access failure in a target report such as UE VarRLF-Report, RACH Report, or one new report.

[0062] Optionally, the source network side device that the terminal accessed before executing the inter-system voice fallback and the first target network side device that the terminal requests access to are different communication systems. For example, the source network side device is a 5G communication system, and the first target network side device is a 2G / 3G / 4G communication system.

[0063] In step 102, the terminal sends the first related information to the second target network side device, and the second target network side device is a network device that successfully accesses after the terminal fails to access the first target network side device. The first related information can be used for network optimization of voice fallback.

[0064] If the terminal fails to access the first target network device, the terminal can reselect and access another network device. For example, the terminal can access the second target network device. If the terminal successfully accesses the second target network device, the terminal can send the first related information for network optimization to the second target network device that has been successfully accessed. The second target network device may be the same communication system as the first target network device. For example, both the second target network device and the first target network device are 4G communication systems. The second target network device may be a different communication system from the first target network device. For example, the first target network device is a 4G communication system and the second target network device is a 3G communication system.

[0065] The second target network device may further be the same communication system as the source network device that the terminal accessed before performing inter-system voice fallback. For example, the source network device is a 5G base station 1, and the second target network device is a 5G base station 2 that the terminal accesses after performing inter-system voice fallback.

[0066] Optionally, when the second target network side device receives the first related information, it analyzes the first related information to determine the failure type of the access failure by the terminal, and can send the failure type and / or the first related information to the source network side device that the terminal accessed before performing inter-system voice fallback, so that the source network side device can perform network optimization of voice fallback based on the failure type and / or the first related information. Or, when the second target network side device receives the first related information, it sends the unanalyzed first related information to the source network side device, and the source network side device analyzes the first related information, determines the failure type of the access failure by the terminal, and can perform network optimization of voice fallback based on the first related information.

[0067] In an embodiment of the present disclosure, when a terminal executes inter-system voice fallback, it requests access to a first target network side device. When the access to the first target network side device fails, it records first related information, and the terminal sends the first related information to a second target network side device that has successfully accessed, so that the network side device can perform network optimization of voice fallback based on the first related information.

[0068] Optionally, the method further includes receiving a switching command or an RRC release instruction with voice fallback indication information attached, and accessing a first target network side device from a currently accessed source network side device based on the switching command or the RRC release instruction.

[0069] In this embodiment, when the terminal needs to execute a voice service, the currently accessed source network-side device sends a handover command or an RRC release instruction to the terminal. If the handover command or the RRC release instruction includes voice Fallback Indication, the terminal can know that the current handover or release is due to voice fallback. In this way, the terminal executes inter-system voice fallback based on the handover command or the RRC release instruction. When the terminal fails to access the first target network-side device from the source network-side device, it records the first related information of the access failure. Optionally, when the terminal records the first related information, the first related information may include the voice fallback indication information.

[0070] Optionally, the terminal can send the first related information to the second target network-side device according to the instruction of the second target network-side device. Here, after the terminal records the first related information, the terminal can notify the second target network-side device that it has saved the first related information of the access failure. For example, when a User Equipment (UE) sends an RRC SetupComplete, RRCResumeComplete, or RRCReestablishmentComplete message, it can append an information availability indication (such as an rlf-InfoAvailable indication) to notify the second target network-side device that the UE has saved the related information of the access failure recorded. The network-side device can obtain the specific failure information record from the UE through UE information request or UE information response messages.

[0071] Optionally, the first related information may include at least one of the following 1) to 6).

[0072] 1) Identifier of the first target network side device That is, it is the failed cell ID.

[0073] 2) Identifier of the source network side device (pervious cell ID) that the terminal accessed before performing inter-system voice fallback

[0074] 3) Identifier of the second target network side device That is, it is the reconnect / reestablishment cell ID. The first related information may preset the identifier of the second target network side device that the terminal accesses when the terminal fails to access the first target network side device.

[0075] 4) Carrier information of the first target network side device The carrier information is available for the source network side device to perform network optimization. For example, based on the carrier information, it is determined whether the first target network side device is suitable for access by the terminal.

[0076] 5) Priority of the first target network side device The priority is available for the source network side device to perform network optimization. For example, based on the priority, it is determined whether to preferentially allow the terminal to access the first target network side device.

[0077] 6) Voice fallback indication information The voice fallback indication information can be used to trigger network optimization. For example, when the source network side device detects the voice fallback indication information, it performs network optimization based on the first related information.

[0078] Optionally, recording the first related information of access failure includes recording the first related information of access failure according to a specified encoding format, where the specified encoding format includes one of the following (1) to (3).

[0079] 1) The network encoding format corresponding to the mobile communication system to which the source network side device accessed by the terminal before performing inter-system voice fallback belongs For example, the recording of the first related information is an RLF report, the source network side device is a 5G base station, and the RLF report can be encoded according to the 5G encoding format.

[0080] 2) The network encoding format corresponding to the mobile communication system to which the first target network side device belongs For example, the recording of the first related information is an RLF report, the first target network side device is a 4G base station, and the RLF report can be encoded according to the 4G encoding format.

[0081] 3) The network encoding format corresponding to the mobile communication system to which the second target network side device belongs For example, the recording of the first related information is an RLF report, the first target network side device is a 3G base station, and the RLF report can be encoded based on the 3G encoding format.

[0082] As an optional embodiment, the terminal's failure to access the first target network side device may include one of the following four scenarios (1) to (4).

[0083] (1) The terminal successfully switches from the source network side device to the first target network side device, and a Radio Link Failure (RLF) occurs within the first time duration. Here, the source network side device is the network side device accessed by the terminal before it executes inter-system voice fallback.

[0084] The source network side device is the network device accessed by the terminal before switching. The first time duration can be set according to the determination needs of the terminal's failure to access the network side device. When the terminal needs to execute a voice service, it triggers a network switch and needs to switch from the currently accessed source network side device to the first target network side device. If the terminal successfully switches to the first target network side device but an RLF occurs within the first time duration, the terminal needs to reselect and re-establish a new network side device.

[0085] For example, when the User Equipment (UE) needs to make or receive a call and triggers an inter-system fallback, if the source network side device accessed by the UE is a 5G base station, after successfully switching from the 5G base station to a 4G base station 1 (i.e., the first target network side device), if an RLF occurs immediately, the UE re-establishes with a new 4G base station 2 (i.e., the second target network side device).

[0086] The UE can send the recorded first related information to the 4G base station 2, and then send the first related information to the 5G base station via the 4G base station 2. The 5G base station receives the first related information and performs network optimization for voice fallback.

[0087] (2) After the terminal releases the radio resource control (RRC) connection with the source network device and enters the idle state, it successfully redirects to the first target network device, and a radio link failure (RLF) occurs within the first time duration. Here, the source network device is the network device accessed by the terminal before it performs inter-system voice fallback.

[0088] When the terminal needs to perform a voice service, it triggers a network redirect. The source network device that the terminal is accessing releases the terminal to the idle state, and then the terminal redirects to the first target network device. If the terminal successfully redirects to the first target network device but an RLF occurs within the first time duration, the terminal needs to reselect and re-establish a new network device.

[0089] For example, when the user equipment (UE) needs to make or receive a call and triggers an inter-system fallback, if the source network device that the UE is accessing is a 5G base station, first the 5G base station releases the UE to the idle state. Subsequently, if the UE successfully redirects to a 4G base station 1 (i.e., the first target network device) but an RLF immediately occurs at the 4G base station 1, the UE re-establishes with a 4G base station 2 (i.e., the second target network device).

[0090] The UE can send the recorded first related information to the 4G base station 2, and then send the first related information to the 5G base station via the 4G base station 2. The 5G base station receives the first related information and performs network optimization for voice fallback.

[0091] (3) A handover failure occurs during the process of the terminal switching from the source network device to the first target network device. Here, the source network device is the network device accessed by the terminal before it performs inter-system voice fallback.

[0092] When the terminal needs to execute a voice service, it triggers a network switch and needs to switch from the source network side device to the first target network side device. If the terminal fails to switch from the source network side device to the first target network side device (fails during the switching process), the terminal needs to reselect and re-establish a new network side device.

[0093] For example, when the UE needs to make or receive a call, it triggers an inter-system fallback. If the source network side device that the UE is accessing is a 5G base station, and the UE fails to switch from the 5G base station to the 4G base station 1 (fails during the switching process), the UE needs to re-establish a connection to a new 4G base station 2.

[0094] The UE can send the recorded first related information to the 4G base station 2 and then send the first related information to the 5G base station via the 4G base station 2. The 5G base station receives the first related information and performs network optimization for voice fallback.

[0095] (4) After the terminal releases the RRC connection with the source network side device and enters the idle state, a failure occurs during the process of starting a random access to the first target network side device. Here, the source network side device is the network side device that the terminal accessed before executing the inter-system voice fallback.

[0096] When the terminal needs to execute a voice service, it triggers a network fallback. The source network side device that the terminal is accessing releases the terminal to the idle state. If the terminal redirects to the first target network side device but fails in the random access, the terminal needs to reselect and re-establish a new network side device.

[0097] The UE transmits the recorded first related information to the 4G base station 2, and can transmit the first related information to the 5G base station via the 4G base station 2. The 5G base station receives the first related information and performs network optimization for voice fallback.

[0098] Regarding the four types of scenarios of access failure from the above-mentioned terminal source network side device to the first target network side device, the second target network side device can report the related information of access failure by the terminal to the source network side device via different methods, and the following examples will be used for explanation.

[0099] Regarding Scenario (1) and Scenario (2), that is, the scenario where the terminal successfully switches from the source network side device to the first target network side device, and within the first time period, after a radio link failure (RLF) occurs and then the terminal re-establishes to the second target network side device, or the scenario where the terminal releases the radio resource control (RRC) connection with the source network side device and enters the idle state, and then successfully redirects to the first target network side device, and within the first time period, after an RLF occurs and then the terminal re-establishes to the second target network side device. For such scenarios, when the second target network side device receives the first related information, it can transmit the related information of access failure to the source network side device via the first target network side device, or the second target network side device can directly transmit the first related information to the source network side device, or the second target network side device can analyze the first related information and then transmit the related information of access failure to the source network side device.

[0100] Taking the example where the source network side device is the 5G base station 1, the first target network side device is the 4G base station 1, the second target network side device is the 4G base station 2 or the 5G base station 2, and the first related information includes the RLF report, the following a) - c) will be described:

[0101] a) The UE reports the RLF report to the 4G base station 2 in response to the instruction of the 4G base station 2. When the 4G base station 2 receives the RLF report, it sends a failure indication to the 4G base station 1, and the failure indication includes the RLF report. The 4G base station 1 can analyze the RLF report to obtain whether the failure type of the access failure by the terminal is switching to a wrong cell or an inter-system mobility failure due to voice fallback. The RLF report includes voice fallback indication information. The 4G base station 1 sends an Inter-system HO Report to the 5G base station 1 or introduces new signaling, and the failure type of switching to a wrong cell or the failure type of inter-system mobility failure due to voice fallback, and the instruction of voice fallback (triggering handover / RRC release), and the failed cell ID, and the previous cell ID, and the reconnect / reestablishment cell ID, and the RLF report, and at least one of the information is carried.

[0102] When the 5G base station 1 receives the above information, it performs network optimization for voice fallback.

[0103] b) The UE reports the RLF report to the 4G base station 2 in response to the instruction of the 4G base station 2 and attaches the 5G base station source cell ID. When the 4G base station 2 receives the RLF report, it transmits the unanalyzed RLF report to the 5G base station 1 via the X2 interface. The 5G base station 1 can analyze the RLF report to obtain the relevant information of the access failure recorded in the UE, and can analyze and obtain the failure type of the access failure.

[0104] c) The UE reports the RLF report to the 5G base station 2 in response to the instruction of the 5G base station 2, that is, the second target network side device in this embodiment is the 5G base station 2. Specifically, after the UE accesses the 5G base station 2 at a certain point in time, the UE transmits the RLF report to the 5G base station 2. After analyzing the RLF report, the 5G base station 2 determines whether the failure type obtained by analyzing the RLF report is to switch to an error cell or a system - to - system mobility failure due to voice fallback via Xn signaling, and / or transmits the RLF report to the 5G base station 1. The 5G base station 1 can perform network optimization based on the information obtained by analyzing the RLF report.

[0105] Regarding scenario (3), that is, regarding the scenario where the terminal re - establishes with the second target network side device after a handover failure occurs during the process of the terminal switching from the source network side device to the first target network side device. Since the handover fails, when the second target network side device receives the first related information, it directly transmits the first related information to the source network side device.

[0106] An example where the source network side device is the 5G base station 1, the first target network side device is the 4G base station 1, the second target network side device is the 4G base station 2, and the first related information includes the RLF report is described as follows:

[0107] When the UE starts the synchronization reconfiguration process but T304 expires, failure-related information is recorded in the UE variable VarRLF-Report. When the UE sends an RRCReconfigurationComplete message with an rlf-InfoAvailable indication attached, it can notify the 4G base station 2 that it has saved the related information on the handover failure recorded by the UE. The 4G base station 2 can obtain specific failure information records (i.e., RLF report) from the UE via UEInformationRequest / UEInformationResponse messages.

[0108] The UE reports the RLF report to the 4G base station 2 according to the instruction. The 4G base station 2 directly sends an inter-system failure indication to the 5G base station 1, with the RLF report attached. After analyzing the RLF report, the 5G base station 1 can determine whether the handover failure type is to switch to an error cell or an inter-system mobility failure due to voice fallback. The 5G base station 1 can perform network optimization based on the information obtained by analyzing the RLF report.

[0109] In this embodiment, for the above scenarios (1), (2), and (3), during inter-system voice fallback, in order for the source network-side device to perform network optimization for inter-system voice fallback, the Inter-system HO Report and new reports related to inter-system record the failure type of switching to an error cell or the failure type of inter-system mobility failure due to voice fallback.

[0110] Regarding the above scene (4), that is, after the terminal releases the RRC connection with the source network side device and enters the idle state, and then fails during the process of starting the random access to the first target network side device, the terminal re-establishes with the second target network side device. When receiving the first related information, the second target network side device can send the related information of the access failure to the source network side device via the first target network side device, or the second target network side device can directly send the first related information to the source network side device, or the second target network side device can analyze the first related information and then send the related information of the access failure to the source network side device.

[0111] An example where the source network side device is the 5G base station 1, the first target network side device is the 4G base station 1, the second target network side device is the 4G base station 2 or the 5G base station 2, and the first related information includes a RACH report (which may also be an RLF report or other newly defined report) is described as follows:

[0112] i) The UE reports the RACH report to the 4G base station 2 according to the instruction of the 4G base station 2. When receiving the RACH report, the 4G base station 2 sends the RACH report to the 4G base station 1 via X2 signaling. The 4G base station 1 analyzes the RACH report and can obtain by analyzing whether the failure type of the access failure by the terminal is to switch to an error cell or a system - to - system mobility failure due to voice fallback. The 4G base station 1 sends the information content and the failure type obtained by analyzing the RACH report to the 5G base station 1.

[0113] The information sent to the 5G base station 1 is The failure type of the failure to switch to an error cell or the failure type of the inter-system mobility failure due to voice fallback, and the instruction of voice fallback, and the failed cell ID, and the previous cell ID, and the reconnect / reestablishment cell ID, and the RACH report, and the carrier information of the redirected cell (for example, the carrier information of 4G base station 1), and the priority of the redirected cell (for example, the priority of 4G base station 1) may include at least one of them.

[0114] ii) The UE reports the RACH report to the 4G base station 2 in response to the instruction of the 4G base station 2 and attaches the 5G base station source cell ID. When the 4G base station 2 receives the RACH report, it transmits the unanalyzed RACH report to the 5G base station 1 via the X2 interface. The 5G base station 1 can analyze the RACH report and obtain the relevant information of the access failure recorded by the UE, and can analyze and obtain the failure type of the access failure.

[0115] iii) The UE reports the RACH report to the 5G base station 2 in response to the instruction of the 5G base station 2, that is, the second target network-side device in this embodiment is the 5G base station 2. Specifically, after the UE accesses the 5G base station 2 at a certain time, the UE transmits the RACH report to the 5G base station 2. After analyzing the RACH report, the 5G base station 2, via the Xn signaling, determines whether the failure type of the analyzed RACH report is to switch to an error cell or an inter-system mobility failure due to voice fallback, and / or transmits the RACH report to the 5G base station 1. The 5G base station 1 can perform network optimization based on the information obtained by analyzing the RACH report.

[0116] In this embodiment, for the above scene (4), when the 5G base station 1 releases the UE and the UE fails to perform random access to the 4G base station, the UE re-establishes to a new 4G base station. When the UE knows that it is an inter-system voice fallback, after failing to perform random access to the 4G base station 1, the UE records the relevant information of the access failure and sends it to the 5G base station 1 for optimization. Also, in this embodiment, by enhancing the information content recorded by the UE, the UE records the information for optimizing cell selection during reporting, that is, the UE records the carrier information of the redirected cell and the priority of the redirected cell, so that the 5G base station 1 can perform network optimization for voice fallback.

[0117] In an embodiment of the present disclosure, when the terminal performs inter-system voice fallback, the terminal requests access to the first target network side device, records first related information when the access to the first target network side device fails, and the terminal sends the first related information to the second target network side device that has succeeded in access, so that the network side device can perform network optimization for voice fallback based on the first related information.

[0118] As shown in FIG. 2, the embodiment of the present disclosure further provides a network optimization method for voice fallback applied to a source network side device, and the method includes the following steps 201 to 202.

[0119] In step 201, the source network side device receives the first related information of the access failure sent by the terminal from the target network side device, and the first related information is the related information recorded when the terminal performs inter-system voice fallback and an access failure occurs.

[0120] In step 202, the source network side device optimizes the relevant parameters of voice fallback based on the first related information for network optimization.

[0121] In this embodiment, the source network side device may be a network side device accessed by the terminal before executing inter-system voice fallback. The target network side device is a target base station that the source network side device should switch to when the terminal executes inter-system voice fallback. Optionally, the target network side device may include a first target network side device and / or a second target network side device. The first target network side device is a target network side device that requests access when the terminal executes inter-system voice fallback. When the terminal fails to access the first target network side device, the first related information is related information recorded when the terminal fails to access the first target network side device. The second target network side device may be a target network side device that the terminal accesses again after failing to access the first target network side device.

[0122] When the terminal executes inter-system voice fallback, if it fails to access the target network side device that requires access, it records the related information of the access failure (i.e., the first related information). And when it successfully accesses another target network side device, it reports the related information of the access failure to the source network side device through the target network side device that has been successfully accessed. The source network side device can perform network optimization of voice fallback based on the related information of the access failure recorded by the terminal.

[0123] As an optional embodiment, the source network side device receiving the first related information of the access failure by the terminal transmitted from the target network side device is The source network device receives second related information transmitted from a second target network device, where the second related information includes the first related information, and / or the source network device receives third related information transmitted from a first target network device, where the third related information includes the first related information, Here, the first target network device is a network device that the terminal requests access to when performing inter-system voice fallback, and the second target network device is a network device that succeeds in access after the terminal fails to access the first target network device.

[0124] In this embodiment, the acquisition of the first related information by the source network device may include the following two methods.

[0125] Method 1 When the terminal fails to access the first target network device, it records the first related information of the access failure and transmits the first related information to the second target network device that has succeeded in access. After analyzing the first related information, the second target network device can analyze and obtain whether the failure type of the access failure by the terminal is to switch to an error cell or is an inter-system mobility failure due to voice fallback. The second target network device transmits second related information to the source network device based on the first related information, and the second related information may include the first related information. Optionally, the second related information may further include indication information that the failure type of the access failure by the terminal is to switch to an error cell, or indication information that the failure type is an inter-system mobility failure due to voice fallback.

[0126] Method 2 The second target network side device transmits the first related information to the first target network side device, and the first target network side device transmits third related information to the source network side device based on the first related information.

[0127] Optionally, when receiving the first related information, the first target network side device analyzes the first related information, and can obtain by analyzing whether the failure type of the access failure by the terminal is to switch to an error cell or is an inter-system mobility failure due to voice fallback. The first target network side device transmits third related information to the source network side device, and the third related information includes the first related information. Optionally, the third related information may further include indication information on whether the failure type of the access failure by the terminal is to switch to an error cell or is an inter-system mobility failure during voice fallback.

[0128] As an optional embodiment, the second related information and / or the third related information further includes indication information that the failure type is to switch to an error cell, or indication information that the failure type is an inter-system mobility failure due to voice fallback.

[0129] For the source network side device to optimize network related parameters of voice fallback based on the first related information, it includes analyzing the second related information and / or the third related information, determining that the failure type of the access failure is to switch to an error cell, or determining that the failure type of the access failure is an inter-system mobility failure due to voice fallback, and optimizing network related parameters of voice fallback based on the first related information. The optimized network parameters are used to preferentially switch the terminal to other network-side devices other than the first target network-side device when performing inter-system voice fallback.

[0130] In this embodiment, both the second related information and / or the third related information can be used for network optimization. When the source network-side device receives the second related information and / or the third related information, it can determine whether the failure type of access failure switches to an error cell when the terminal accesses the first target network-side device, or whether it is an inter-system mobility failure due to voice fallback. In order to avoid repeated occurrence of the access failure in the next access, the source network-side device can, through network parameter optimization, avoid the terminal preferentially accessing the first target network-side device when the next inter-system voice fallback occurs, that is, the terminal can be made to preferentially access other network devices other than the first target network-side device, such as the second target network-side device.

[0131] Optionally, when the source network-side device determines that the failure type of access failure by the terminal switches to an error cell based on the second related information and / or the third related information, or determines that the failure type of access failure by the terminal is an inter-system mobility failure due to voice fallback, it can determine the access level of the first target network-side device. For example, during the next inter-system voice fallback, instead of preferentially switching the terminal to the first target network-side device, by preferentially switching the terminal to the second target network-side device, the failure experience of the terminal's network switching can be reduced.

[0132] In this embodiment, when the second target network side device receives the first related information transmitted from the terminal, it analyzes the first related information to determine whether the failure type of the access failure by the terminal is to switch to an error cell or a system mobility failure due to voice fallback. When the second target network side device transmits the failure type and / or the first related information to the source network side device, the source network side device can directly perform network optimization for voice fallback based on the second related information without the need for re-analysis.

[0133] When the second target network side device receives the first related information transmitted from the terminal, it can directly transmit the first related information to the first target network side device. The first target network side device analyzes the first related information to determine whether the failure type of the access failure by the terminal is to switch to an error cell or a system mobility failure due to voice fallback. When the first target network side device transmits the failure type and / or the first related information to the source network side device, the source network side device can directly perform network optimization for voice fallback based on the third related information without the need for re-analysis.

[0134] As an optional embodiment, the acquisition of the first related information by the source network side device may further include the following Method 3.

[0135] Method 3 The source network side device receiving the first related information of the access failure by the terminal transmitted from the target network side device is Receiving the first related information transmitted from the second target network side device, that is, when the terminal executes inter-system voice fallback and fails to access the first target network side device, the terminal records the first related information of the access failure and transmits the first related information to the second target network side device that has succeeded in access. The second target network side device can transmit the unanalyzed first related information to the source network side device without analyzing the first related information.

[0136] The method further includes The source network side device analyzes the first related information, determines whether the failure type of the access failure is to switch to an error cell or is an inter-system mobility failure due to voice fallback, and includes optimizing the related parameters of voice fallback based on the first related information for network optimization. The optimized network parameters are used to preferentially switch the terminal to other network side devices other than the first target network side device when executing inter-system voice fallback.

[0137] Optionally, when the second target network side device receives the first related information transmitted from the terminal, it can directly include the unanalyzed first related information in the second related information (or the second related information and the first related information are the same) and transmit it to the source network side device. The source network side device analyzes the second related information. When it is determined that the failure type of the access failure by the terminal is to switch to an error cell or a system - to - system mobility failure due to voice fallback, the source network side device can perform network optimization during the next system - to - system voice fallback based on the analysis content. For example, after multiple statistics, when the UE needs to perform a system - to - system call fallback, instead of preferentially switching the UE to the first target network side device, the source network side device preferentially switches the UE to the second target network side device, thereby reducing the switching failure and RLF experienced by the terminal at the first target network side device.

[0138] Optionally, the first related information may include at least one of the following 1) to 6).

[0139] 1) The identifier of the first target network side device That is, the cell ID of the access failure (failed cell ID).

[0140] 2) The identifier of the source network side device (pervious cell ID) That is, the identifier of the source network side device accessed by the terminal before performing the system - to - system voice fallback.

[0141] 3) The identifier of the second target network side device That is, the reconnect / reestablishment cell ID.

[0142] 4) The carrier information of the first target network side device The carrier information is usable for the source network side device to perform network optimization. For example, based on the carrier information, it is determined whether the first target network side device is suitable for access by the terminal.

[0143] 5) The priority of the first target network side device The priority is usable for the source network side device to perform network optimization. For example, based on the priority, it is determined whether to preferentially allow the terminal to access the first target network side device.

[0144] 6) Voice fallback indication information The voice fallback indication information is usable to trigger network optimization. For example, when the source network side device detects the voice fallback indication information, it performs network optimization based on the first related information.

[0145] Optionally, the encoding format of the first related information may include one of the following 1) to 3).

[0146] 1) The network encoding format corresponding to the mobile communication system to which the source network side device belongs For example, the record of the first related information is an RLF report, the source network side device is a 5G base station, and the RLF report may be encoded according to the 5G encoding format.

[0147] 2) The network encoding format corresponding to the mobile communication system to which the first target network side device belongs For example, the record of the first related information is an RLF report, the first target network side device is a 4G base station, and the RLF report may be encoded according to the 4G encoding format.

[0148] 3) Network encoding format corresponding to the mobile communication system to which the second target network side device belongs For example, the recording of the first related information is an RLF report, the first target network side device is a 3G base station, and the RLF report can be encoded based on a 3G encoding format.

[0149] In an embodiment of the present disclosure, the source network side device receives first related information for network optimization, and the first related information is related information recorded when the terminal fails to access the first target network side device when performing inter-system voice fallback. The source network side device can reduce the experience of the terminal accessing an error cell by performing network optimization of inter-system voice fallback based on the first related information of the access failure.

[0150] As shown in FIG. 3, an embodiment of the present disclosure further provides an information processing method for voice fallback applied to a second target network side device, and the method may include the following steps 301 to 302.

[0151] In step 301, the second target network side device receives first related information transmitted from the terminal, and the first related information is related information recorded when the terminal fails to access when performing inter-system voice fallback.

[0152] In this embodiment, when the terminal performs inter-system voice fallback, if it fails to access the first target network side device, the terminal records the first related information of the access failure. When the terminal successfully accesses the second target network side device, the terminal transmits the first related information to the second target network side device.

[0153] In step 302, based on the first related information, the second target network device transmits the second related information of the access failure by the terminal to the source network device that the terminal accessed before performing the inter-system voice fallback. The second related information includes the first related information, and / or the second target network device transmits the first related information to the first target network device. The first target network device is the network device that requests access when the terminal performs the inter-system voice fallback. The first related information and / or the second related information can be used for network optimization of voice fallback.

[0154] Optionally, the second target network device transmits the first related information of the access failure by the terminal to the source network device that the terminal accessed before performing the inter-system voice fallback.

[0155] In this embodiment, the first target network device is the network device that requests access when the terminal performs the inter-system voice fallback, and the second target network device is the network device that succeeds in access after the terminal fails to access the first target network device. When the terminal performs the inter-system voice fallback, if the access to the first target network device fails, the first related information of the access failure is recorded. If the terminal succeeds in accessing the second target network device, the terminal transmits the first related information to the second target network device.

[0156] The second target network device may directly transmit the first related information to the source network device that the terminal accessed before performing voice fallback, or may transmit the information content obtained after analyzing the first related information (i.e., the second related information) to the source network device after analyzing the first related information. Alternatively, the second target network device can transmit the first related information to the first target network device so that the first target network device transmits the analysis content to the source network device after analyzing the first related information. The source network device performs network optimization for voice fallback based on the related information of access failure.

[0157] The second target network device may be the same communication system as the first target network device. For example, both the second target network device and the first target network device are 4G communication systems. The second target network device may be a different communication system from the first target network device. For example, the first target network device is a 4G communication system and the second target network device is a 3G communication system.

[0158] In an embodiment of the present disclosure, when an access failure occurs when the terminal performs inter-system voice fallback, the second target network device receives the first related information of the access failure recorded at that time, transmits the first related information to the first target network device, and / or transmits the second related information of the access failure based on the first related information to the source network device that the terminal accessed before performing inter-system voice fallback, so that the source network device performs network optimization for voice fallback based on the related information of access failure, and avoids the terminal accessing the error cell during the next voice fallback.

[0159] Optionally, the first related information may include at least one of the following 1) to 7).

[0160] 1) The identifier of the first target network side device That is, it is the failed cell ID of the access failure.

[0161] 2) The identifier of the source network side device (pervious cell ID) that the terminal accessed before performing inter-system voice fallback

[0162] 3) The identifier of the second target network side device That is, it is the reconnect / reestablishment cell ID.

[0163] 4) The first related information may be recorded during the target report. The target report is an RLF report, a random access (RACH) report, or a newly defined report.

[0164] 5) The carrier information of the first target network side device The carrier information can be used by the source network side device for network optimization. For example, based on the carrier information, it is determined whether the first target network side device is suitable for access by the terminal.

[0165] 6) The priority of the first target network side device The priority can be used by the source network side device for network optimization. For example, based on the priority, it is determined whether to preferentially allow the terminal to access the first target network side device.

[0166] 7) Voice fallback indication information The voice fallback indication information can be used to trigger network optimization. For example, when the source network side device detects the voice fallback indication information, it performs network optimization based on the first related information.

[0167] Optionally, the encoding format of the first related information may include one of the following 1) to 3).

[0168] 1) The network encoding format corresponding to the mobile communication system to which the source network side device belongs For example, the recording of the first related information is an RLF report, the source network side device is a 5G base station, and the RLF report may be encoded according to the 5G encoding format.

[0169] 2) The network encoding format corresponding to the mobile communication system to which the first target network side device belongs For example, the recording of the first related information is an RLF report, the first target network side device is a 4G base station, and the RLF report may be encoded according to the 4G encoding format.

[0170] 3) The network encoding format corresponding to the mobile communication system to which the second target network side device belongs For example, the recording of the first related information is an RLF report, the first target network side device is a 3G base station, and the RLF report may be encoded based on the 3G encoding format.

[0171] Optionally, the terminal's failure to access the first target network side device may include one of the following 1) to 4).

[0172] 1) After the terminal successfully switches from the source network device to the first target network device and a radio link failure (RLF) occurs within the first time period, the terminal re-establishes with the second target network device.

[0173] 2) After the terminal releases the radio resource control (RRC) connection with the source network device and enters the idle state, and then successfully redirects to the first target network device and an RLF occurs within the first time period, the terminal re-establishes with the second target network device.

[0174] 3) After a switching failure occurs during the process of the terminal switching from the source network device to the first target network device, the terminal re-establishes with the second target network device.

[0175] 4) After the terminal releases the RRC connection with the source network device and enters the idle state, and then a failure occurs during the process of starting a random access to the first target network device, the terminal re-establishes with the second target network device.

[0176] Here, the source network device is the network device accessed by the terminal before it performs inter-system voice fallback.

[0177] When receiving the first related information, when the second target network device transmits the second related information to the source network device based on the first related information, it may first analyze the first related information and transmit the content obtained by the analysis to the source network device, or directly transmit the unanalyzed first related information to the source network device. Hereinafter, specific descriptions will be given by way of examples.

[0178] As an optional embodiment, based on the first related information, before the terminal executes inter-system voice fallback, the terminal transmits the second related information of the access failure to the source network-side device that it accessed. This is analyzing the first related information and determining that the failure type of the access failure by the terminal is to switch to an error cell, or determining that the failure type of the access failure by the terminal is an inter-system mobility failure due to voice fallback, and transmitting the second related information to the source network-side device, where the second related information may include instruction information indicating that the failure type is to switch to an error cell, or instruction information indicating that the failure type is an inter-system mobility failure due to voice fallback.

[0179] In this embodiment, the second target network-side device can analyze the first related information and determine that the failure type of the access failure by the terminal is to switch to an error cell, or determine that the failure type of the access failure by the terminal is an inter-system mobility failure due to voice fallback. The second target network-side device can transmit the first related information and the failure type to the source network-side device so that the source network-side device can perform network optimization for voice fallback.

[0180] For example, the source network side device is the 5G base station 1, the second target network side device is the 5G base station 2, and the first target network side device is the 4G base station 1. When the UE accesses the 5G base station 2 at a certain point in time, the UE sends an RLF report to the 5G base station 2. After analyzing the RLF report, the 5G base station 2 determines whether the failure type obtained by analyzing the RLF report is to switch to an error cell or a system - to - system mobility failure due to voice fallback via Xn signaling, and / or sends the RLF report to the 5G base station 1. The 5G base station 1 can perform network optimization based on the information obtained by analyzing the RLF report, and can avoid the terminal accessing the error cell during the next voice fallback.

[0181] As an optional embodiment, based on the first related information, the terminal sending the second related information of the access failure to the source network side device accessed by the terminal before performing the system - to - system voice fallback includes the terminal sending the second related information to the source network side device accessed by the terminal before performing the system - to - system voice fallback via the first interface.

[0182] In this embodiment, the second target network side device does not analyze the first related information after receiving it, but directly sends the first related information to the source network side device. The source network side device analyzes the first related information and can determine that the failure type of the access failure by the terminal is to switch to an error cell or a system - to - system mobility failure due to voice fallback. The source network side device can perform network optimization of the voice fallback based on the information content obtained by the analysis, so as to avoid the terminal accessing the error cell during the next voice fallback.

[0183] For example, the source network side device is a 5G base station 1, the second target network side device is a 4G base station 2, and the first target network side device is a 4G base station 1. The UE reports an RLF report to the 4G base station 2 in response to an instruction from the 4G base station 2 and attaches the 5G base station source cell ID. When the 4G base station 2 receives the RLF report, it transmits the unanalyzed RLF report to the 5G base station 1 via the X2 interface. The 5G base station 1 can analyze the RLF report, obtain the relevant information of the access failure recorded in the UE, and analyze and obtain the failure type of the access failure, thereby performing network optimization for voice fallback.

[0184] When the second target network side device receives the first related information, it can transmit the related information of the access failure to the source network side device via the first target network side device. Optionally, transmitting the first related information to the first target network side device includes transmitting a failure instruction including the first related information to the first target network side device.

[0185] In this embodiment, the second target network side device transmits the first related information to the first target network side device via a failure instruction. The first target network side device analyzes the first related information and determines that the failure type of the access failure by the terminal is to switch to an error cell, or determines that the failure type of the access failure by the terminal is an inter-system mobility failure due to voice fallback. The first target network side device can transmit the failure type and / or the first related information to the source network side device for the source network side device to perform network optimization for voice fallback.

[0186] For example, the source network side device is a 5G base station 1, the second target network side device is a 4G base station 2, and the first target network side device is a 4G base station 1. The UE reports an RLF report to the 4G base station 2 according to the instruction of the 4G base station 2. When the 4G base station 2 receives the RLF report, it sends a failure indication to the 4G base station 1, and the failure indication includes the RLF report. The 4G base station 1 can analyze the RLF report to obtain whether the failure type of the access failure by the terminal is to switch to an error cell or a system - to - system mobility failure due to voice fallback. The 4G base station 1 sends an Inter - system HO Report to the 5G base station 1, or introduces new signaling, and the Inter - system HO Report or signaling includes the failure type and / or the first related information.

[0187] In an embodiment of the present disclosure, the second target network side device receives the first related information of the access failure recorded when the terminal fails to access the first target network side when performing system - to - system voice fallback, sends the first related information to the first target network side device, and / or, based on the first related information, sends the second related information of the access failure to the source network side device that the terminal accessed before performing system - to - system voice fallback so that the source network side device performs network optimization of voice fallback based on the related information of the access failure.

[0188] As shown in FIG. 4, an embodiment of the present disclosure further provides an information processing method for voice fallback applied to a first target network side device, and the method includes the following steps 401 to 402.

[0189] In step 401, the first target network side device receives the first related information sent from the second target network side device, and the first related information is related information recorded when the terminal executes inter-system voice fallback and an access failure occurs.

[0190] Step 402, the first target network side device sends the third related information of the access failure by the terminal to the source network side device accessed by the terminal before executing inter-system voice fallback based on the first related information, the third related information includes the first related information, and the second target network side device is a network device that succeeds in access after the terminal fails to access the first target network side device.

[0191] The first related information and / or the third related information can be used for network optimization of voice fallback.

[0192] In this embodiment, the first target network side device is the target network side device that fails to access when the terminal executes inter-system voice fallback. Before executing inter-system voice fallback, the source network side device accessed by the terminal may be a 5G base station, and the first target network side device may be a 4G base station. When it is necessary to execute inter-system voice fallback, if the terminal fails to access from the 5G base station to the 4G base station, the first related information of the access failure is recorded.

[0193] The first related information received by the first target network side device is transmitted from the second target network side device to which the terminal has successfully accessed. For example, when the terminal re - establishes connection to the second target network side device after failing to access the first target network side device, the terminal can transmit the first related information to the second target network side device, and the second target network side device can transmit the first related information to the first target network side device.

[0194] When the first target network side device obtains the first related information, by analyzing the first related information, it can obtain the content of the related information of the access failure by the terminal, for example, the failure type of the access failure is access to an error cell, and thereby transmit the third related information related to the access failure to the source network side device, so that the network side device can perform network optimization for voice fallback.

[0195] In an embodiment of the present disclosure, the first target network side device receives the first related information of the access failure recorded when the terminal fails to access the first target network side when performing inter - system voice fallback, and based on the first related information, transmits the third related information of the access failure to the source network side device that the terminal accessed before performing inter - system voice fallback. The third related information includes the first related information. In this way, the source network side device performs network optimization for voice fallback based on the related information of the access failure, and avoids the terminal accessing the error cell during the next voice fallback.

[0196] Optionally, the first related information may include at least one of the following 1) to 7).

[0197] 1) The identifier of the first target network side device That is, it is the failed cell ID of the access failure.

[0198] 2) The identifier of the source network device (pervious cell ID) accessed by the terminal before executing the inter-system voice fallback

[0199] 3) The identifier of the second target network device That is, it is the reconnect / reestablishment cell ID.

[0200] 4) The terminal can record the first related information in the target report. The target report is an RLF report, a random access (RACH) report, or a newly defined report.

[0201] 5) The carrier information of the first target network device The carrier information can be used by the source network device for network optimization. For example, based on the carrier information, it is determined whether the first target network device is suitable for access by the terminal.

[0202] 6) The priority of the first target network device The priority can be used by the source network device for network optimization. For example, based on the priority, it is determined whether to preferentially allow the terminal to access the first target network device.

[0203] 7) Voice fallback indication information The voice fallback indication information can be used to trigger network optimization. For example, when the source network device detects the voice fallback indication information, it performs network optimization based on the first related information.

[0204] Optionally, the encoding format of the first related information may include one of the following 1) to 3). 1) A network encoding format corresponding to the mobile communication system to which the source network side device belongs For example, the recording of the first related information is an RLF report, the source network side device is a 5G base station, and the RLF report may be encoded according to the 5G encoding format.

[0205] 2) A network encoding format corresponding to the mobile communication system to which the first target network side device belongs For example, the recording of the first related information is an RLF report, the first target network side device is a 4G base station, and the RLF report may be encoded according to the 4G encoding format.

[0206] 3) A network encoding format corresponding to the mobile communication system to which the second target network side device belongs For example, the recording of the first related information is an RLF report, the first target network side device is a 3G base station, and the RLF report may be encoded based on the 3G encoding format.

[0207] As an optional embodiment, based on the first related information, the terminal sending the third related information of the access failure to the source network side device accessed by the terminal before performing the inter-system voice fallback may include analyzing the first related information, determining that the failure type of the access failure is to switch to an error cell, or determining that it is an inter-system mobility failure due to voice fallback, and sending the third related information to the source network side device, where the third related information may include indication information that the failure type is to switch to an error cell, or indication information that the failure type is an inter-system mobility failure due to voice fallback.

[0208] In this embodiment, the first target network side device can determine, by analyzing the first related information, that the failure type of the access failure by the terminal is to switch to an error cell, or determine that the failure type of the access failure by the terminal is an inter-system mobility failure due to voice fallback. The first target network side device can send the first related information and the failure type to the source network side device so that the source network side device can perform network optimization for voice fallback.

[0209] Optionally, receiving the first related information sent from the second target network side device includes receiving a failure indication sent from the second target network side device, and the failure indication includes the first related information.

[0210] In this embodiment, the terminal sends the first related information of the recorded access failure to the second target network side device, and the second target network side device sends the first related information to the first target network side device according to the failure indication. The first target network side device can analyze the first related information and determine that the failure type of the access failure by the terminal is to switch to an error cell, or determine that the failure type of the access failure by the terminal is an inter-system mobility failure due to voice fallback. The first target network side device can send the failure type and / or the first related information to the source network side device so that the source network side device can perform network optimization for voice fallback.

[0211] Optionally, the terminal fails to access the first target network side device, which means that the terminal successfully switches from the source network side device to the first target network side device and a radio link failure (RLF) occurs within the first time period. After the terminal releases the radio resource control (RRC) connection with the source network side device and enters the idle state, it succeeds in redirecting to the first target network side device, and RLF occurs within the first time duration, a handover failure occurs during the process of the terminal switching from the source network side device to the first target network side device, after the terminal releases the RRC connection with the source network side device and enters the idle state, a failure occurs during the process of starting a random access to the first target network side device, including one of the above, Here, the source network side device is the network side device accessed by the terminal before performing inter-system voice fallback.

[0212] After the terminal fails to access the first target network side device, it can succeed in accessing the second target network side device, and report the first related information of the recorded access failure to the second target network side device, and the second target network side device can send the first related information to the first target network side device.

[0213] In an embodiment of the present disclosure, the first target network side device receives the first related information of the access failure recorded when the terminal fails to access the first target network side during inter-system voice fallback, and based on the first related information, sends the third related information of the access failure to the source network side device accessed by the terminal before performing inter-system voice fallback. The third related information includes the first related information. In this way, the source network side device can perform network optimization of voice fallback based on the related information of the access failure, and avoid the terminal accessing the error cell during the next voice fallback.

[0214] The above embodiments have described the information processing method for voice fallback according to the present disclosure. Hereinafter, the corresponding apparatus will be further described with reference to the drawings.

[0215] Specifically, as shown in FIG. 5, an embodiment of the present disclosure provides an information processing apparatus 500 for voice fallback applied to a terminal. The information processing apparatus 500 includes a recording unit 510 and a first transmission unit 520. The recording unit 510 is configured to record the first related information of access failure when the terminal fails to access the first target network side device. The first target network side device is a network device that requests access when the terminal performs inter-system voice fallback. The first transmission unit 520 is configured to transmit the first related information to the second target network side device. The second target network side device is a network device that succeeds in access after the terminal fails to access the first target network side device.

[0216] Optionally, the terminal fails to access the first target network side device, which includes one of the following: the terminal succeeds in switching from the source network side device to the first target network side device and a radio link failure (RLF) occurs within the first time period; after the terminal releases the radio resource control (RRC) connection with the source network side device and enters the idle state, it succeeds in redirecting to the first target network side device and an RLF occurs within the first time period; a switching failure occurs during the process of the terminal switching from the source network side device to the first target network side device; a failure occurs during the process of the terminal starting a random access to the first target network side device after releasing the RRC connection with the source network side device and entering the idle state. Here, the source network side device is the network side device accessed by the terminal before the terminal executes inter-system voice fallback.

[0217] Optionally, the first related information is the identifier of the first target network side device, and the identifier of the source network side device accessed by the terminal before the terminal executes inter-system voice fallback, and the identifier of the second target network side device, and the carrier information of the first target network side device, and the priority of the first target network side device, and voice fallback instruction information, and includes at least one of them.

[0218] Optionally, the recording unit is specifically configured to record the first related information of access failure according to a specified encoding format. Here, the specified encoding format is the network encoding format corresponding to the mobile communication system to which the source network side device accessed by the terminal before the terminal executes inter-system voice fallback belongs, and the network encoding format corresponding to the mobile communication system to which the first target network side device belongs, and the network encoding format corresponding to the mobile communication system to which the second target network side device belongs, and includes one of them.

[0219] Optionally, the device further includes a fourth receiving unit and an execution unit. The fourth receiving unit is configured to receive a switching instruction or an RRC release instruction with voice fallback instruction information attached. The execution unit is configured to access the first target network side device from the currently accessed source network side device based on the switching instruction or the RRC release instruction.

[0220] It should be noted that the above device according to the embodiments of the present disclosure can achieve the same technical effects by implementing all the method steps realized by the method embodiments applicable to the above terminal, and the description of the same parts and beneficial effects in the method embodiments in this example is omitted here.

[0221] Specifically, as shown in FIG. 6, the embodiments of the present disclosure provide a network optimization device 600 for voice fallback applicable to source network side devices. The device includes a first receiving unit 610 and a processing unit 620. The first receiving unit 610 is configured to receive first related information of access failure by the terminal transmitted from the target network side device. The first related information is related information recorded when the terminal executes inter-system voice fallback and access failure occurs. The processing unit 620 is configured to perform network optimization on related parameters of voice fallback based on the first related information.

[0222] Optionally, the first receiving unit is specifically configured to receive second related information transmitted from a second target network side device, where the second related information includes the first related information, and / or the first receiving unit is specifically configured to receive third related information transmitted from a first target network side device, where the third related information includes the first related information. Here, the first target network side device is a network device that requests access when the terminal executes inter-system voice fallback, and the second target network side device is a network device that succeeds in access after the terminal fails to access the first target network side device.

[0223] Optionally, the second related information and / or the third related information further includes indication information that the failure type is to switch to an error cell, or indication information that the failure type is an inter-system mobility failure due to voice fallback.

[0224] Specifically, the processing unit analyzes the second related information and / or the third related information, determines that the failure type of the access failure is to switch to an error cell, or determines that the failure type of the access failure is an inter-system mobility failure due to voice fallback, and optimizes the related parameters of voice fallback based on the first related information, and is configured to execute. The optimized network parameters are used to preferentially switch the terminal to other network-side devices other than the first target network-side device when performing inter-system voice fallback.

[0225] Optionally, the first related information is the identifier of the first target network-side device, the identifier of the source network-side device, the identifier of the second target network-side device, the carrier information of the first target network-side device, the priority of the first target network-side device, and at least one of the voice fallback indication information.

[0226] It should be noted that the above device according to the embodiments of the present disclosure can achieve all the method steps realized by the method embodiments applied to the above source network-side device and achieve the same technical effects. Here, the description of the same parts and beneficial effects in the method embodiments in this embodiment is omitted.

[0227] Specifically, as shown in FIG. 7, the embodiments of the present disclosure provide an information processing apparatus 700 for voice fallback applied to a second target network-side device. The apparatus includes a second receiving unit 710 and a second transmitting unit 720. The second receiving unit 710 is configured to receive first related information transmitted from the terminal, and the first related information is related information recorded when the terminal executes inter-system voice fallback and an access failure occurs. The second transmitting unit 720 is configured to transmit, based on the first related information, second related information about the access failure by the terminal to the source network-side device accessed by the terminal before the terminal executes inter-system voice fallback, and the second related information includes the first related information, and / or the second transmitting unit 720 is configured to transmit the first related information to the first target network-side device. Here, the first target network-side device is a network device that requests access when the terminal executes inter-system voice fallback.

[0228] Optionally, the second transmitting unit specifically analyzes the first related information and determines that the failure type of the access failure by the terminal is to switch to an error cell, or determines that the failure type of the access failure by the terminal is an inter-system mobility failure due to voice fallback, and transmits the second related information to the source network-side device, where the second related information includes instruction information indicating that the failure type is to switch to an error cell, or instruction information indicating that the failure type is an inter-system mobility failure due to voice fallback.

[0229] Optionally, the second transmitting unit specifically is configured to transmit the second related information to the source network-side device accessed by the terminal before the terminal executes inter-system voice fallback via the first interface.

[0230] Optionally, the second transmitting unit specifically is configured to transmit the failure indication included in the first related information to the first target network-side device.

[0231] Optionally, the first related information is the identifier of the first target network side device, and the identifier of the source network side device accessed by the terminal before executing the inter-system voice fallback, and the identifier of the second target network side device, and the carrier information of the first target network side device, and the priority of the first target network side device, and voice fallback indication information, and includes at least one of them.

[0232] Optionally, the encoding format of the first related information is the network encoding format corresponding to the mobile communication system to which the source network side device belongs, and the network encoding format corresponding to the mobile communication system to which the first target network side device belongs, and the network encoding format corresponding to the mobile communication system to which the second target network side device belongs, and includes one of them.

[0233] It should be noted that the above device according to the embodiments of the present disclosure can achieve the same technical effects by realizing all the method steps realized by the method embodiments applicable to the second target network side device. Here, the description of the same parts and beneficial effects in the method embodiments of this embodiment is omitted.

[0234] Specifically, as shown in FIG. 8, the embodiments of the present disclosure provide an information processing apparatus 800 for voice fallback applicable to a first target network side device. The apparatus includes a third receiving unit 810 and a third transmitting unit 820. The third receiving unit 810 is configured to receive the first related information transmitted from the second target network side device. The first related information is related information recorded when the terminal executes the inter-system voice fallback and an access failure occurs. The third transmission unit 820 is configured to transmit, based on the first related information, third related information on access failure by the terminal to the source network-side device accessed by the terminal before the terminal executes inter-system voice fallback, and the third related information includes the first related information. Here, the second target network-side device is a network device that succeeds in access after the terminal fails to access the first target network-side device.

[0235] Optionally, the third transmission unit specifically analyzes the first related information, determines that the failure type of the access failure by the terminal is to switch to an error cell, or determines that the failure type of the access failure by the terminal is an inter-system mobility failure due to voice fallback, and transmits the third related information to the source network-side device, where the third related information includes instruction information indicating that the failure type is to switch to an error cell, or instruction information indicating that the failure type is an inter-system mobility failure due to voice fallback.

[0236] Optionally, the second reception unit specifically is configured to receive a failure instruction transmitted from the second target network-side device, and the failure instruction includes the first related information.

[0237] Optionally, the first related information includes at least one of an identifier of the first target network-side device, an identifier of the source network-side device accessed by the terminal before the terminal executes inter-system voice fallback, an identifier of the second target network-side device, carrier information of the first target network-side device, the priority of the first target network-side device, and voice fallback instruction information.

[0238] Optionally, the encoding format of the first related information includes one of the following: a network encoding format corresponding to the mobile communication system to which the source network side device belongs; a network encoding format corresponding to the mobile communication system to which the first target network side device belongs; a network encoding format corresponding to the mobile communication system to which the second target network side device belongs.

[0239] It should be noted that the above device according to the embodiments of the present disclosure can achieve the same technical effects by implementing all the method steps realized by the method embodiments applicable to the first target network side device. Here, the same parts and beneficial effects as those in the method embodiments in this embodiment will be omitted from the description.

[0240] It should be noted that the division of units in the embodiments of the present disclosure is schematic and is merely a logical function division. There may be other division methods when actually implemented. In addition, each functional unit in each embodiment of the present disclosure may be integrated into one processing unit, each unit may exist physically alone, or two or more units may be integrated into one unit. The above integrated unit may be implemented in the form of hardware or in the form of a software functional unit.

[0241] When the integrated unit is implemented in the form of a unit based on software functions and sold or used as an independent product, it can be stored in a processor-readable storage medium. Based on such an understanding, the technical solution of the present disclosure, in essence or in part contributing to the prior art, or all or part of the technical solution can be represented in the form of a software product. The computer software product is stored in a storage medium and includes several commands to cause a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the methods described in each embodiment of the present disclosure. The storage medium includes various media that can store program codes, such as a USB disk, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0242] As shown in FIG. 9, an embodiment of the present disclosure further provides a terminal including a memory 920, a transceiver 900, and a processor 910. The memory 920 is used to store a computer program, and the transceiver 900 is used to transmit and receive data under the control of the processor 910. The processor 910 reads out the computer program in the memory and is used to execute the operation that when the terminal fails to access the first target network-side device and records the first related information of the access failure. The first target network-side device is a network device that requests access when the terminal executes inter-system voice fallback. The transceiver is used to execute the operation of transmitting the first related information to a second target network-side device. The second target network-side device is a network device that succeeds in accessing after the terminal fails to access the first target network-side device.

[0243] Optionally, the failure of the terminal to access the first target network device is that the terminal successfully switches from the source network device to the first target network device, and a radio link failure (RLF) occurs within a first time period; after the terminal releases the radio resource control (RRC) connection with the source network device and enters the idle state, it successfully redirects to the first target network device, and an RLF occurs within the first time period; a switching failure occurs during the process of the terminal switching from the source network device to the first target network device; after the terminal releases the RRC connection with the source network device and enters the idle state, a failure occurs during the process of starting a random access to the first target network device, and includes one of the above. Here, the source network device is the network device accessed by the terminal before executing the inter-system voice fallback.

[0244] Optionally, the first related information is the identifier of the first target network device, the identifier of the source network device accessed by the terminal before executing the inter-system voice fallback, the identifier of the second target network device, the carrier information of the first target network device, the priority of the first target network device. voice fallback indication information, and includes at least one of the above.

[0245] Optionally, the processor reads the computer program in the memory and is used to record the first related information of the access failure according to a specified encoding format. Here, the specified encoding format is The network encoding format corresponding to the mobile communication system to which the source network-side device accessed before the terminal executes inter-system voice fallback, and the network encoding format corresponding to the mobile communication system to which the first target network-side device belongs, and one of the network encoding formats corresponding to the mobile communication system to which the second target network-side device belongs.

[0246] Optionally, the transceiver is further used to receive a switching instruction or a radio resource control (RRC) release instruction with voice fallback indication information attached. The processor reads out the computer program in the memory and is used to execute accessing from the currently accessed source network-side device to the first target network-side device based on the switching instruction or the RRC release instruction.

[0247] Here, in FIG. 9, the bus architecture can include any number of interconnected buses and bridges, specifically connecting various circuits such as one or more processors represented by processor 910 and memory represented by memory 920. The bus architecture can further connect various other circuits such as peripheral devices, regulators, and power management circuits, which are well-known in the art, so the description thereof is omitted herein. The bus interface provides an interface. The transceiver 900 can be a plurality of elements, that is, it can include a transmitter and a receiver, and provides a unit for communicating with various other devices on the transmission medium. For different user devices, the user interface 930 can further be an interface that can be externally / internally connected to the required devices, and the devices to be connected include, but are not limited to, a keypad, a display, a speaker, a microphone, a joystick, etc. The processor 910 is responsible for the management and general processing of the bus architecture, and the memory 920 can store data used when the processor 910 executes operations.

[0248] The processor 910 may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA), or a Complex Programmable Logic Device (CPLD), and the processor may adopt a multi-core architecture.

[0249] It should be noted that the above terminal according to the embodiment of the present disclosure can achieve the same technical effect by realizing all the method steps realized by the method embodiment applicable to the above terminal. Here, the description of the same parts and beneficial effects in the method embodiment of this embodiment is omitted.

[0250] As shown in FIG. 10, an embodiment of the present disclosure further provides a network-side device including a memory 1020, a transceiver 1000, and a processor 1010. The network-side device is a source network-side device. Here, the memory 1020 is used to store a computer program, and the processor 1010 is used to read the computer program in the memory. The transceiver 1000 transmits and receives data under the control of the processor 1010, and is used to receive first related information on access failure by a terminal transmitted from a target network-side device. The first related information is related information recorded when the terminal executes inter-system voice fallback and an access failure occurs. The processor reads the computer program in the memory, and is used to perform network optimization of related parameters of voice fallback based on the first related information.

[0251] Optionally, specifically, the transceiver is used to receive second related information transmitted from a second target network-side device, where the second related information includes the first related information, and / or receive third related information transmitted from a first target network-side device, where the third related information includes the first related information. Here, the first target network-side device is a network device that requests access when the terminal executes inter-system voice fallback, and the second target network-side device is a network device that succeeds in access after the terminal fails to access the first target network-side device.

[0252] Optionally, the second related information and / or the third related information further includes instruction information indicating that the failure type is to switch to an error cell, or instruction information indicating that the failure type is an inter-system mobility failure due to voice fallback.

[0253] The processor reads the computer program in the memory and analyzes the second related information and / or the third related information, determines that the failure type of the access failure is to switch to an error cell, or determines that the failure type of the access failure is an inter-system mobility failure due to voice fallback, and optimizes the related parameters of voice fallback based on the first related information, and is used to execute the above. The optimized network parameters are used to preferentially switch the terminal to other network-side devices other than the first target network-side device when performing inter-system voice fallback.

[0254] Optionally, the first related information includes the identifier of the first target network-side device, the identifier of the source network-side device, the identifier of the second target network-side device, the carrier information of the first target network-side device, the priority of the first target network-side device, and at least one of the voice fallback indication information.

[0255] Here, in FIG. 10, the bus architecture can include any number of interconnected buses and bridges, and specifically, various circuits such as one or more processors represented by processor 1010 and memory represented by memory 1020 are connected. The bus architecture can further connect various other circuits such as peripheral devices, regulators, and power management circuits, which are well-known in the art, so the description in this specification is omitted. The bus interface provides an interface. The transceiver 1000 can be a plurality of elements, that is, it can include a transmitter and a receiver, and provides a unit for communicating with various other devices on the transmission medium. The processor 1010 is responsible for the management and general processing of the bus architecture, and the memory 1020 can store data used when the processor 1010 executes operations.

[0256] The processor 1010 can be a CPU, ASIC, FPGA, or CPLD, and the processor can adopt a multi-core architecture.

[0257] It should be noted that the network-side device according to the embodiment of the present disclosure can achieve all the method steps realized by the method embodiment applied to the source network-side device and achieve the same technical effect. Here, the description of the same parts and beneficial effects as those in the method embodiment in this embodiment is omitted.

[0258] The embodiment of the present disclosure further provides a network-side device, and the network-side device is a network-side device including a second target memory, a transceiver, and a processor. Here, the memory is used to store a computer program, the processor is used to read the computer program in the memory, the transceiver transmits and receives data under the control of the processor, and receives the first related information transmitted from the terminal, where the first related information is the related information recorded when the terminal executes inter-system voice fallback and an access failure occurs. Based on the first related information, the terminal transmits the second related information of access failure to the source network-side device accessed before the terminal executes inter-system voice fallback, where the second related information includes the first related information and is used to execute at least one of transmitting the first related information to the first target network-side device. Here, the first target network-side device is a network device that requests access when the terminal executes inter-system voice fallback.

[0259] Optionally, the processor reads the computer program in the memory and analyzes the first related information, determines that the failure type of access failure by the terminal is to switch to an error cell, or determines that the failure type of access failure by the terminal is an inter-system mobility failure due to voice fallback, and is used to execute such determination. The transceiver is further used to execute transmitting the second related information to the source network-side device, where the second related information includes indication information that the failure type is to switch to an error cell, or indication information that the failure type is an inter-system mobility failure due to voice fallback.

[0260] Optionally, the transceiver is further used to execute transmitting the second related information to the source network-side device accessed before the terminal executes inter-system voice fallback via a first interface.

[0261] Optionally, the transceiver is further used to execute transmitting the failure indication including the first related information to the first target network-side device.

[0262] Here, in this embodiment, the bus architecture can include any number of interconnected buses and bridges. Specifically, various circuits of one or more processors represented by the processor and memory represented by the memory are connected. The bus architecture can further connect various other circuits such as peripheral devices, regulators, and power management circuits, which are well-known in this field, so the description in this specification is omitted. The bus interface provides an interface. The transceiver can be a plurality of elements, that is, it can include a transmitter and a receiver, and provides a unit for communicating with various other devices on the transmission medium. The processor is responsible for the management and general processing of the bus architecture, and the memory can store data used when the processor executes operations.

[0263] The processor may be a CPU, ASIC, FPGA, or CPLD, and the processor may adopt a multi-core architecture.

[0264] It should be noted that the above network-side device according to the embodiment of the present disclosure can achieve all the method steps realized by the method embodiment applicable to the above second target network-side device and achieve the same technical effect. Here, the description of the same parts and beneficial effects as those in the method embodiment in this embodiment is omitted.

[0265] The embodiment of the present disclosure further provides a network-side device. The network-side device is a first target network-side device including a memory, a transceiver, and a processor. Here, the memory is used to store a computer program, the processor is used to read the computer program in the memory, the transceiver transmits and receives data under the control of the processor, and receives first related information transmitted from a second target network-side device, where the first related information is related information recorded when a terminal executes inter-system voice fallback and an access failure occurs, and Based on the first related information, the terminal transmits third related information on access failure to the source network-side device accessed by the terminal before executing inter-system voice fallback, and the third related information includes the first related information, which is used to execute: Here, the second target network-side device is a network device that succeeds in access after the terminal fails to access the first target network-side device.

[0266] Optionally, the processor reads out the computer program in the memory and analyzes the first related information, determines that the failure type of the access failure by the terminal is to switch to an error cell, or determines that the failure type of the access failure by the terminal is an inter-system mobility failure due to voice fallback, which is used to execute: The transceiver is further used to execute transmitting the third related information to the source network-side device, and the third related information includes instruction information indicating that the failure type is to switch to an error cell, or instruction information indicating that the failure type is an inter-system mobility failure due to voice fallback.

[0267] Optionally, the transceiver is further used to execute receiving a failure instruction transmitted from the second target network-side device, and the failure instruction includes the first related information.

[0268] Here, in this embodiment, the bus architecture can include any number of interconnected buses and bridges. Specifically, various circuits such as one or more processors represented by the processor and memory represented by the memory are connected. The bus architecture can further connect various other circuits such as peripheral devices, regulators, and power management circuits, which are well-known in this field, so the description thereof is omitted in this specification. The bus interface provides an interface. The transceiver can be a plurality of elements, that is, it can include a transmitter and a receiver, and provides a unit for communicating with various other devices on the transmission medium. The processor is responsible for the management and general processing of the bus architecture, and the memory can store data used when the processor executes operations.

[0269] The processor may be a CPU, ASIC, FPGA, or CPLD, and the processor may adopt a multi-core architecture.

[0270] It should be noted that the network-side device according to the embodiment of the present disclosure can achieve the same technical effect by realizing all the method steps realized by the method embodiment applied to the first target network-side device. Here, the description of the same parts and beneficial effects as those in the method embodiment in this embodiment is omitted.

[0271] In addition, specific embodiments of the present disclosure further provide a processor-readable storage medium storing a computer program, where, when the program is executed by a processor, the steps of the above-described voice fallback information processing method are realized, or the steps of the above-described voice fallback network optimization method are realized. And the same technical effects can be achieved, and the description is omitted here to avoid duplication. Here, the readable storage medium may be any available medium or data storage device accessible by the processor, including but not limited to magnetic memory (such as floppy disks, hard disks, magnetic tapes, magneto-optical disks (MO), etc.), optical memory (such as compact disks (CD), digital video disks (DVD), Blu-ray (registered trademark) discs (BD), high-definition versatile discs (HVD), etc.), and semiconductor memory (such as ROM, electrically programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), non-volatile memory (NAND FLASH), solid state hard disks (SSD), etc.).

[0272] A person skilled in the art will understand that the embodiments of the present disclosure can be provided as a method, a system, or a computer program product. Therefore, the present disclosure can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Further, the present disclosure can adopt the form of a computer program product implemented on one or more computer-readable storage media (including but not limited to magnetic disk memory and optical memory) containing computer-usable program code.

[0273] The present disclosure will be described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to the embodiments of the present disclosure. It should be understood that each flow and / or block in the flowchart and / or block diagram, and combinations of flows and / or blocks in the flowchart and / or block diagram, can be realized by computer-executable instructions. These computer-executable instructions are provided to the processor of a general-purpose computer, a dedicated computer, an embedded processor, or other programmable data processing equipment to generate one device, and the instructions executed by the processor of the computer or other programmable data processing equipment generate a device for realizing the functions specified in one or more flows of the flowchart and / or one or more blocks of the block diagram.

[0274] These processor-executable instructions can be stored in a processor-readable memory that can guide a computer or other programmable data processing equipment to operate in a specific manner. Thereby, the instructions stored in the processor-readable memory generate a manufactured product including an instruction device, and the instruction device realizes the functions specified in one or more flows of the flowchart and / or one or more blocks of the block diagram.

[0275] The executable commands of these processors can also be loaded into a computer or other programmable data processing device, causing the computer or other programmable device to execute a series of operation steps to generate a process implemented by the computer. Thus, the commands executed by the computer or other programmable device provide steps for realizing the functions specified in one or more flows of a flowchart and / or one or more blocks of a block diagram.

[0276] For the sake of convenience and brevity of description, the specific operation processes of the above-described system, apparatus, and unit can be referred to the corresponding processes in the method embodiments, and those skilled in the art can clearly understand that the description is omitted here.

[0277] In the embodiments according to the present disclosure, it can be understood that the disclosed apparatus and method can be implemented in other forms. For example, the apparatus embodiments described above are merely illustrative. For example, the division of the above units is only a division based on logical functions, and other division methods may be adopted in actual implementation. For example, a plurality of units or components may be combined, or integrated into other systems, or some features may be ignored or not executed. Also, the couplings, direct couplings, or communication connections shown or discussed between each other may be indirect couplings or communication connections through some interfaces, apparatuses, or units, and may be in electrical, mechanical, or other forms.

[0278] The units described as the separation members may or may not be physically separated, and the members shown as units may or may not be physical units, that is, they may be located in one place or distributed in a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution means of this embodiment.

[0279] In addition, each functional unit in each embodiment of the present disclosure may be integrated into one processing unit, each unit may physically exist alone, or two or more units may be integrated into one unit. The above integrated unit may be implemented in the form of hardware or in the form of a software functional unit.

[0280] Obviously, those skilled in the art can make various changes and modifications to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these changes and modifications of the present disclosure fall within the scope of the claims of the present disclosure and the scope of equivalent technologies thereof, the present disclosure is also intended to include these changes and modifications.

Claims

1. An information processing method for voice fallback, comprising: when a terminal fails to access a first target network side device and records first related information of the access failure, where the first target network side device is a network device that requests access when the terminal performs inter-system voice fallback; the terminal sending the first related information to a second target network side device, where the second target network side device is a network device that succeeds in access after the terminal fails to access the first target network side device. An information processing method for voice fallback.

2. The situation where the terminal fails to access the first target network side device includes: the terminal successfully switches from a source network side device to the first target network side device and a radio link failure (RLF) occurs within a first time period; after the terminal releases a radio resource control (RRC) connection with the source network side device and enters the idle state, it successfully redirects to the first target network side device and an RLF occurs within the first time period; a switching failure occurs during the process of the terminal switching from the source network side device to the first target network side device; a failure occurs during the process of the terminal starting a random access to the first target network side device after releasing the RRC connection with the source network side device and entering the idle state. The method according to claim 1, wherein the source network side device is a network side device accessed by the terminal before performing inter-system voice fallback.

3. The first related information includes at least one of: an identifier of the first target network side device; an identifier of a source network side device accessed by the terminal before performing inter-system voice fallback; an identifier of the second target network side device; carrier information of the first target network side device; a priority of the first target network side device; voice fallback indication information. The method according to claim 1.

4. Recording the first related information of the access failure includes: ​ recording first related information of access failure according to a specified encoding format, where the specified encoding format includes a network encoding format corresponding to a mobile communication system to which a source network side device accessed by a terminal before performing inter-system voice fallback belongs, a network encoding format corresponding to a mobile communication system to which the first target network side device belongs, a network encoding format corresponding to a mobile communication system to which the second target network side device belongs, and the method according to claim 1 includes one of them.

5. The method further includes receiving a switching command or an RRC release instruction with voice fallback indication information attached, and accessing a first target network side device from a currently accessed source network side device based on the switching command or the RRC release instruction, and the method according to claim 1.

6. A network optimization method for voice fallback, comprising a source network side device receiving first related information of access failure transmitted by a terminal from a target network side device, where the first related information is related information recorded when the terminal performs inter-system voice fallback and access failure occurs, and the source network side device network-optimizing related parameters of voice fallback based on the first related information, and a network optimization method for voice fallback.

7. The source network side device receiving first related information of access failure transmitted by a terminal from a target network side device includes the source network side device receiving second related information transmitted by a second target network side device, where the second related information includes the first related information, and / or the source network side device receiving third related information transmitted by a first target network side device, where the third related information includes the first related information. Here, the first target network side device is a network device that requests access when the terminal executes inter-system voice fallback, and the second target network side device is a network device that succeeds in access after the terminal fails to access the first target network side device. The method according to claim 6.

8. The second related information and / or the third related information further includes instruction information indicating that the failure type is to switch to an error cell. The source network side device optimizing the related parameters of voice fallback based on the first related information includes: analyzing the second related information and / or the third related information and determining that the failure type of the access failure is to switch to an error cell; optimizing the related parameters of voice fallback based on the first related information, including: The optimized network parameters are used to preferentially switch the terminal to another network side device other than the first target network side device when executing inter-system voice fallback. The method according to claim 7.

9. The second related information and / or the third related information further includes instruction information indicating that the failure type is an inter-system mobility failure due to voice fallback. The source network side device optimizing the related parameters of voice fallback based on the first related information includes: analyzing the second related information and / or the third related information and determining that the failure type of the access failure is an inter-system mobility failure due to voice fallback; optimizing the related parameters of voice fallback based on the first related information, including: The optimized network parameters are used to preferentially switch the terminal to another network side device other than the first target network side device when executing inter-system voice fallback. The method according to claim 7.

10. The first related information includes: the identifier of the first target network side device; the identifier of the source network side device; the identifier of the second target network side device; the carrier information of the first target network side device; the priority of the first target network side device; The method according to claim 6, comprising at least one of the voice fallback indication information.

11. A method for processing voice fallback information, comprising: receiving, by a second target network side device, first related information transmitted from a terminal, where the first related information is related information recorded when the terminal executes inter-system voice fallback and an access failure occurs; transmitting, by the second target network side device based on the first related information, second related information about an access failure by the terminal to a source network side device that the terminal accessed before executing inter-system voice fallback, where the second related information includes the first related information, and at least one of transmitting, by the second target network side device, the first related information to a first target network side device; wherein the first target network side device is a network device that requests access when the terminal executes inter-system voice fallback.

12. Transmitting, based on the first related information, second related information about an access failure by the terminal to a source network side device that the terminal accessed before executing inter-system voice fallback includes: analyzing the first related information and determining that the failure type of the access failure by the terminal is to switch to an error cell; transmitting the second related information to the source network side device, where the second related information includes indication information that the failure type is to switch to an error cell.

13. Transmitting, based on the first related information, second related information about an access failure by the terminal to a source network side device that the terminal accessed before executing inter-system voice fallback includes: analyzing the first related information and determining that the failure type of the access failure by the terminal is an inter-system mobility failure due to voice fallback; transmitting the second related information to the source network side device, where the second related information includes indication information that the failure type is an inter-system mobility failure due to voice fallback.

14. Based on the first related information, the terminal transmits second related information on access failure to the source network side device accessed by the terminal before the terminal executes inter-system voice fallback. This is The method according to claim 11, including transmitting the second related information to the source network side device accessed by the terminal before the terminal executes inter-system voice fallback via the first interface. **Claim 15** Transmitting the first related information to the first target network side device is The method according to claim 11, including transmitting a failure instruction including the first related information to the first target network side device. **Claim 16** An information processing method for voice fallback, comprising: The first target network side device receives first related information transmitted from the second target network side device, where the first related information is related information recorded when the terminal executes inter-system voice fallback and an access failure occurs. Based on the first related information, the first target network side device transmits third related information on access failure by the terminal to the source network side device accessed by the terminal before the terminal executes inter-system voice fallback, where the third related information includes the first related information. Here, the second target network side device is a network device that succeeds in access after the terminal fails to access the first target network side device. An information processing method for voice fallback. **Claim 17** Based on the first related information, transmitting third related information on access failure by the terminal to the source network side device accessed by the terminal before the terminal executes inter-system voice fallback is Analyzing the first related information and determining that the failure type of access failure by the terminal is to switch to an error cell. Transmitting the third related information to the source network side device, where the third related information includes instruction information indicating that the failure type is to switch to an error cell. The method according to claim 16. **Claim 18** Based on the first related information, transmitting third related information on access failure by the terminal to the source network side device accessed by the terminal before the terminal executes inter-system voice fallback is Analyzing the first related information and determining that the failure type of the access failure by the terminal is an inter-system mobility failure due to voice fallback; Transmitting the third related information to the source network side device, where the third related information includes indication information that the failure type is an inter-system mobility failure due to voice fallback, the method according to claim 16.

19. Receiving the first related information transmitted from the second target network side device includes receiving a failure indication transmitted from the second target network side device, where the failure indication includes the first related information, the method according to claim 16.

20. A terminal including a memory, a transceiver, and a processor, wherein the memory is used to store a computer program, the transceiver is used to transmit and receive data under the control of the processor, the processor reads out the computer program in the memory, and is used to execute recording the first related information of the access failure when the terminal fails to access the first target network side device, the first target network side device is a network device that requests access when the terminal performs inter-system voice fallback, the transceiver is used to transmit the first related information to the second target network side device, the second target network side device is a network device that succeeds in access after the terminal fails to access the first target network side device, the terminal.

21. The terminal fails to access the first target network side device means that the terminal successfully switches from the source network side device to the first target network side device and a radio link failure (RLF) occurs within a first time period; after the terminal releases the radio resource control (RRC) connection with the source network side device and enters the idle state, it successfully redirects to the first target network side device and an RLF occurs within a first time period; a switching failure occurs during the process of the terminal switching from the source network side device to the first target network side device After the terminal releases the RRC connection with the source network device and enters the idle state, one of the following occurs: a failure occurs during the process of starting a random access to the first target network device. Here, the source network device is the network device accessed by the terminal before the terminal executes inter-system voice fallback. The terminal according to claim 20.

22. The first related information includes the identifier of the first target network device, the identifier of the source network device accessed by the terminal before the terminal executes inter-system voice fallback, the identifier of the second target network device, the carrier information of the first target network device, the priority of the first target network device, and at least one of voice fallback indication information. The terminal according to claim 20.

23. The processor is further used to read the computer program in the memory and record the first related information of the access failure according to a specified encoding format. Here, the specified encoding format includes the network encoding format corresponding to the mobile communication system to which the source network device accessed by the terminal before the terminal executes inter-system voice fallback belongs, the network encoding format corresponding to the mobile communication system to which the first target network device belongs, and one of the network encoding formats corresponding to the mobile communication system to which the second target network device belongs. The terminal according to claim 20.

24. The transceiver transmits and receives data under the control of the processor and is used to receive a switching command or an RRC release instruction with voice fallback indication information attached. The processor reads the computer program in the memory and is used to execute accessing from the currently accessed source network device to the first target network device based on the switching command or the RRC release instruction. The terminal according to claim 20.

25. A network device including a memory, a transceiver, and a processor, The memory is used to store a computer program, and the processor is used to read the computer program in the memory. The transceiver transmits and receives data under the control of the processor, and is used to execute receiving first related information on access failure by the terminal transmitted from the target network side device. The first related information is related information recorded when the terminal executes inter-system voice fallback and an access failure occurs. The processor reads the computer program in the memory, and is a network side device used to execute network optimization of related parameters of voice fallback based on the first related information.

26. Specifically, the transceiver transmits and receives data under the control of the processor, and receives second related information transmitted from a second target network side device, where the second related information includes the first related information, and / or receives third related information transmitted from a first target network side device, where the third related information includes the first related information, and is used to execute this. Here, the first target network side device is a network device that requests access when the terminal executes inter-system voice fallback, and the second target network side device is a network device that succeeds in access after the terminal fails to access the first target network side device. The network side device according to claim 25.

27. The second related information and / or the third related information further includes instruction information indicating that the failure type is to switch to an error cell. Specifically, the processor reads the computer program in the memory, and analyzes the second related information and / or the third related information, determines that the failure type of the access failure is to switch to an error cell, and is used to execute network optimization of related parameters of voice fallback based on the first related information. The optimized network parameters are used to preferentially switch the terminal to other network-side devices other than the first target network-side device when performing inter-system voice fallback, for the network-side device according to claim 26.

28. The second related information and / or the third related information further includes indication information that the failure type is an inter-system mobility failure due to voice fallback. Specifically, the processor reads out the computer program in the memory and analyzes the second related information and / or the third related information to determine that the failure type of the access failure is an inter-system mobility failure due to voice fallback, and is used to perform network optimization of related parameters of voice fallback based on the first related information. The optimized network parameters are used to preferentially switch the terminal to other network-side devices other than the first target network-side device when performing inter-system voice fallback, for the network-side device according to claim 26.

29. The first related information includes the identifier of the first target network-side device, the identifier of the source network-side device, the identifier of the second target network-side device, the carrier information of the first target network-side device, the priority of the first target network-side device, and at least one of the voice fallback indication information, for the network-side device according to claim 25.

30. A network-side device including a memory, a transceiver, and a processor, wherein the memory is used to store a computer program, and the processor is used to read out the computer program in the memory, the transceiver transmits and receives data under the control of the processor, and receives first related information transmitted from a terminal, where the first related information is related information recorded when the terminal performs inter-system voice fallback and an access failure occurs. Based on the first related information, the terminal transmits the second related information of the access failure to the source network device accessed before the terminal executes the inter-system voice fallback, where the second related information includes the first related information and at least one of transmitting the first related information to the first target network device, and is used to execute the above. Here, the first target network device is a network device that requests access when the terminal executes the inter-system voice fallback.

31. The processor reads the computer program in the memory and is used to analyze the first related information and determine that the failure type of the access failure by the terminal is to switch to an error cell. The transceiver transmits and receives data under the control of the processor and is used to transmit the second related information to the source network device, where the second related information includes the instruction information that the failure type is to switch to an error cell. The network device according to claim 30.

32. The processor reads the computer program in the memory and is used to analyze the first related information and determine that the failure type of the access failure by the terminal is an inter-system mobility failure due to voice fallback. The transceiver transmits and receives data under the control of the processor and is used to transmit the second related information to the source network device, where the second related information includes the instruction information that the failure type is an inter-system mobility failure due to voice fallback. The network device according to claim 30.

33. The transceiver transmits and receives data under the control of the processor and is used to transmit the second related information to the source network device accessed before the terminal executes the inter-system voice fallback via the first interface. The network device according to claim 30.

34. The transceiver transmits and receives data under the control of the processor and The network-side device according to claim 30, which is used to execute sending a failure instruction including the first related information to the first target network-side device.

35. A network-side device including a memory, a transceiver, and a processor, wherein the memory is used to store a computer program, and the processor is used to read out the computer program in the memory, the transceiver transmits and receives data under the control of the processor, and receives first related information transmitted from a second target network-side device, where the first related information is related information recorded when a terminal executes inter-system voice fallback and an access failure occurs, and based on the first related information, transmits third related information on access failure by the terminal to a source network-side device that the terminal accessed before executing inter-system voice fallback, where the third related information includes the first related information, and is used to execute this. Here, the second target network-side device is a network device that succeeds in access after the terminal fails to access the first target network-side device.

36. The processor reads out the computer program in the memory, and is used to execute analyzing the first related information and determining that the failure type of access failure by the terminal is to switch to an error cell. Specifically, the transceiver transmits and receives data under the control of the processor, and transmits the third related information to the source network-side device, where the third related information includes instruction information that the failure type is to switch to an error cell, and is used to execute this according to claim 35.

37. The processor reads out the computer program in the memory, and is used to execute analyzing the first related information and determining that the failure type of access failure by the terminal is an inter-system mobility failure due to voice fallback. Specifically, the transceiver transmits and receives data under the control of the processor, and Transmitting the third related information to the source network side device, where the third related information is used to execute the instruction information indicating that the failure type is an inter-system mobility failure due to voice fallback, the network side device according to claim 35.

38. The transceiver transmits and receives data under the control of the processor, and is used to execute receiving a failure instruction transmitted from a second target network side device, where the failure instruction includes the first related information, the network side device according to claim 35.

39. An information processing device for voice fallback, A recording unit configured to record first related information of access failure when a terminal fails to access a first target network side device, where the first target network side device is a network device that requests access when the terminal executes inter-system voice fallback, the recording unit A first transmission unit configured to transmit the first related information to a second target network side device, where the second target network side device is a network device that succeeds in access after the terminal fails to access the first target network side device, the information processing device for voice fallback including the first transmission unit.

40. A network optimization device for voice fallback, A first receiving unit configured to receive first related information of access failure by a terminal transmitted from a target network side device, where the first related information is related information recorded when the terminal executes inter-system voice fallback and an access failure occurs, the first receiving unit A processing unit configured to optimize related parameters of voice fallback based on the first related information, the network optimization device for voice fallback including the processing unit.

41. An information processing device for voice fallback, A second receiving unit configured to receive first related information transmitted from a terminal, where the first related information is related information recorded when the terminal executes inter-system voice fallback and an access failure occurs, the second receiving unit Based on the first related information, the terminal transmits second related information of access failure to the source network side device accessed by the terminal before the terminal executes inter-system voice fallback, where the second related information includes the first related information, and a second transmission unit configured to perform at least one of transmitting the first related information to a first target network side device. Here, the first target network side device is a network device that requests access when the terminal executes inter-system voice fallback, and it is an information processing device for voice fallback.

42. An information processing device for voice fallback, A third receiving unit configured to receive first related information transmitted from a second target network side device, where the first related information is related information recorded when the terminal executes inter-system voice fallback and an access failure occurs, and it is a third receiving unit. Based on the first related information, a third transmission unit configured to transmit third related information of access failure by the terminal to the source network side device accessed by the terminal before the terminal executes inter-system voice fallback, where the third related information includes the first related information, and it includes a third transmission unit. Here, the second target network side device is a network device that successfully accesses after the terminal fails to access the first target network side device, and it is an information processing device for voice fallback.

43. A processor-readable storage medium storing a computer program, When the computer program is executed by a processor, it realizes the steps of the information processing method for voice fallback according to any one of claims 1 to 5, or realizes the steps of the network optimization method for voice fallback according to any one of claims 6 to 10, or realizes the steps of the information processing method for voice fallback according to any one of claims 11 to 19, and it is a processor-readable storage medium.

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