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WO2019061453A1 - Dispositif et procédé de détection de résultat de reprise de csfb, et support de stockage informatique - Google Patents

Dispositif et procédé de détection de résultat de reprise de csfb, et support de stockage informatique Download PDF

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Publication number
WO2019061453A1
WO2019061453A1 PCT/CN2017/104896 CN2017104896W WO2019061453A1 WO 2019061453 A1 WO2019061453 A1 WO 2019061453A1 CN 2017104896 W CN2017104896 W CN 2017104896W WO 2019061453 A1 WO2019061453 A1 WO 2019061453A1
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WIPO (PCT)
Prior art keywords
csfb
terminal
voice call
base station
request message
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2017/104896
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English (en)
Chinese (zh)
Inventor
曾元清
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Yun Zhong Fei Network Technology Co Ltd
Original Assignee
Shenzhen Yun Zhong Fei Network Technology Co Ltd
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Filing date
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Application filed by Shenzhen Yun Zhong Fei Network Technology Co Ltd filed Critical Shenzhen Yun Zhong Fei Network Technology Co Ltd
Priority to PCT/CN2017/104896 priority Critical patent/WO2019061453A1/fr
Priority to CN201780001921.1A priority patent/CN108064461B/zh
Publication of WO2019061453A1 publication Critical patent/WO2019061453A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • H04W36/144—Reselecting a network or an air interface over a different radio air interface technology
    • H04W36/1443—Reselecting a network or an air interface over a different radio air interface technology between licensed networks

Definitions

  • the present invention relates to the field of CSFB (Circuit Switched Fallback), and in particular, to a CSFB fallback result detecting method and apparatus, and a computer storage medium.
  • CSFB Circuit Switched Fallback
  • LTE Long-term evolution
  • 2G/3G dual-mode terminals are wireless-signal-mode
  • a dual-mode or multi-mode terminal with LTE and 2G/3G access capabilities When using LTE access, 2G/3G circuit domain service signals cannot be transmitted.
  • a CS Circuit Switched
  • PS Packet Switch
  • the originator of the telephone is called the caller (MO, Mobile Origination)
  • the receiver of the call is called the called (MT, Mobile Termination)
  • the MO and the MT each have their own CSFB signaling flow.
  • the CSFB process due to the occurrence of various abnormal conditions, the CSFB process often fails, which causes the phone to fail to connect. How to effectively detect the CSFB fallback result under abnormal scenarios is especially necessary.
  • an embodiment of the present invention provides a CSFB fallback result detecting method and apparatus, and a computer storage medium.
  • an embodiment of the present invention provides a method for detecting a fallback result of a CSFB, including:
  • the voice call state of the terminal in the global mobile communication system GSM network In the process of performing CSFB based on the indication information indicating that the terminal performs the voice service by using the preset CSFB optimization scheme, detecting the voice call state of the terminal in the global mobile communication system GSM network; the voice call of the terminal under the GSM network is Triggered when the redirection command sent by the LTE base station does not include the redirection information;
  • the indication information is carried in an attach accept message sent by the LTE base station to the terminal; the attach accept message is the terminal to the LTE base station
  • the LTE base station sends the attach request message, and the CSFB is triggered when the terminal receives the paging message sent by the LTE base station.
  • the determining whether the CSFB is successfully dropped by using the detected voice call state includes:
  • the determining whether the CSFB is successfully dropped by using the detected voice call state includes:
  • the terminal When the terminal sends a channel request message to the GSM cell and successfully establishes a voice call link, it is determined that the CSFB fallback is successful.
  • the method further includes:
  • the terminal is controlled to continue to execute the CSFB process.
  • determining that the CSFB fallback result is a fallback success including:
  • the terminal When the terminal sends a channel request message to the GSM cell, and the access request cause value is the preset value, detecting whether the voice call link is successfully established;
  • the method further includes:
  • an embodiment of the present invention provides a fallback result detecting apparatus for a circuit domain fallback CSFB, including: a detecting part and a determining part; wherein
  • the detecting part is configured to detect a voice call state of the terminal in a global mobile communication system GSM network in a process of performing CSFB according to the indication information indicating that the terminal performs voice service by using a preset CSFB optimization scheme;
  • the voice call in the GSM network is triggered when the redirection command sent by the LTE base station does not include the redirection information;
  • the determining part is configured to determine whether the CSFB is successfully dropped by using the detected voice call state
  • the indication information is carried in an attach accept message sent by the LTE base station to the terminal; the attach accept message is sent by the LTE base station after the terminal sends an attach request message to the LTE base station; the CSFB It is triggered when the terminal receives the paging message sent by the LTE base station.
  • the determining part is configured as:
  • the determining part is configured as:
  • the determining part is further configured to:
  • the terminal is controlled to continue to execute the CSFB process.
  • the determining part is configured as:
  • the terminal When the terminal sends a channel request message to the GSM cell, and the access request cause value is the preset value, detecting whether the voice call link is successfully established;
  • the determining part is further configured to:
  • an embodiment of the present invention provides a fallback result detecting apparatus for a circuit domain fallback CSFB, including: a processor and a memory for storing a computer program capable of running on a processor, wherein the processor is configured to run The computer program, when the steps of the method of any of the first aspects are performed.
  • an embodiment of the present invention provides a computer readable storage medium having stored thereon a computer program, wherein the computer program is executed by a processor to implement the steps of the method of any of the first aspects.
  • the process of performing CSFB according to the indication information indicating that the terminal performs the voice service by using the preset CSFB optimization scheme detecting the voice call state of the terminal in the global mobile communication system GSM network; Terminal under the GSM network The voice call is triggered when the redirection command sent by the LTE base station does not include the redirection information.
  • the voice call state is used to determine whether the CSFB is successfully dropped.
  • the indication information is carried in the LTE base station.
  • the attach accept message sent to the terminal; the attach accept message is sent by the LTE base station after the terminal sends an attach request message to the LTE base station; and the CSFB is sent by the terminal to the LTE base station.
  • the CSFB fallback result can be detected in a scenario where the EPC and the eNB are not synchronized, so that the CSFB optimization scheme can be further improved to improve the probability of the CSFB process success, so as to improve the user's call experience.
  • FIG. 1 is a schematic diagram of a channel acquisition process in a CSFB process
  • FIG. 2 is a schematic flowchart of a method for detecting a fallback result of a CSFB according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram 1 of a simulation code according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram 2 of a simulation code according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a composition of a CSFB fallback result detecting apparatus according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram showing the hardware structure of a CSFB fallback result detecting apparatus according to an embodiment of the present invention.
  • the CSFB-enabled terminal can search for the LTE network, complete the LTE/2G network joint registration, and be able to voice call and call.
  • the CSFB process consists of three phases: 1) the UE initiates a call (corresponding to MO) on the LTE network, or receives a page (corresponding to the MT); 2) the UE falls back under the guidance of the LTE network and searches for a suitable 2G/3G cell, such as GSM cell/WCDMA cell access; 3) UE read GSM small
  • the zone/WCDMA cell system broadcasts messages and establishes a voice call.
  • the channel acquisition process is described below.
  • FIG. 1 is a schematic diagram of a channel acquisition process in a CSFB process. As shown in FIG. 1, the channel acquisition process includes the following steps:
  • Step 101 The UE is powered on, and performs an Evolved Packet System (EPS)/International Mobile Subscriber Identification Number (IMSI) attachment.
  • EPS Evolved Packet System
  • IMSI International Mobile Subscriber Identification Number
  • Step 102 The UE receives the CS paging message and starts executing the CSFB process.
  • Step 103 The UE receives the redirect command sent by the network, and carries the redirect information in the redirect command.
  • the redirection command is implemented by LTE_RRCConnectionRelease signaling.
  • Step 104 The UE sends a channel request message (CHANNEL_REQUEST) to the network based on the redirection information carried in the redirection command.
  • a channel request message (CHANNEL_REQUEST)
  • the redirection information is used by the UE to perform redirection, and may include, but is not limited to, a starting frequency of a neighboring frequency group of a configured GSM radio access network (GERAN, GSM Radio Access Network).
  • GERAN GSM radio access network
  • BCCH Broadcast Control Channel
  • the T360 timer is started to count the number of times the CHANNEL_REQUEST is retransmitted by the random access procedure, and the maximum number of retransmissions is preset.
  • the terminal will start the T3126 timer to time the terminal to silently not send CHANNEL_REQUEST; if the T3126 timer expires (the time is reached), the network still has no The channel request of the terminal is answered. Then the terminal gives up the request attempt.
  • Step 105 The UE receives the IM message replied by the network, and obtains the channel allocated by the network by using the IM message.
  • the configuration of the original network deployed on the base station signaling side is not updated in real time, and the configuration that the network sends to the UE occurs.
  • the information is inconsistent with the actual deployment, which leads to various abnormalities in the inter-system (InterRAT) voice call of CSFB, such as failure to connect, repeated connection failure, and the like.
  • InterRAT inter-system
  • the CSFB fallback scheme adopts the 3GPP R8 redirection fallback scheme.
  • the problem of parameter configuration will probabilistically cause the CSFB process to be abnormal.
  • the embodiment of the present invention provides a method for detecting a fallback result of CSFB in a scenario where no redirection information is provided on the network side.
  • the method for detecting the fallback result of the CSFB may include:
  • S201 detecting a voice call state of the terminal in a global mobile communication system GSM network in a process of performing CSFB according to the indication information indicating that the terminal performs voice service by using a preset CSFB optimization scheme;
  • the voice call of the terminal in the GSM network is triggered when the redirection command sent by the LTE base station does not include the redirection information;
  • the indication information is carried in an attach accept message sent by the LTE base station to the terminal; the attach accept message is sent by the LTE base station after the terminal sends an attach request message to the LTE base station; the CSFB Is that the terminal receives the homing sent by the LTE base station Triggered when the message is called.
  • a network environment can be constructed by using a simulation platform, including: a TDD-LTE cell, a TDSCDMA/GSM cell, and a GSM cell is used as a cell for implementing CS voice in this embodiment, where a GSM neighboring cell is configured in the LTE SIB. Cell information, LTE neighbor cell information is configured in GSM SI.
  • the CSFB process is then executed based on the constructed network environment.
  • an abnormal scenario is configured in the CSFB process: the evolved packet core network (EPC, Evolved Packet Core) is simulated by the redirection command sent by the network side without carrying any redirection information.
  • EPC evolved packet core network
  • eNodeB evolved Node B
  • the network environment of the embodiment of the present invention is based on a simulation platform configuration, on the one hand, the worker does not need to go to the site for detection, thereby reducing personnel costs; on the other hand, the scene of the scene may also contain other factors, thereby affecting the detection.
  • the simulation platform of the embodiment of the present invention can stably reproduce the CSFB anomaly scene with a small probability in the network, and verify the feasibility and stability of the optimized CSFB scheme, that is, verify that the network side does not in the redirect command.
  • the feasibility and stability of the CSFB optimization scheme under the conditions of carrying any redirection information. Based on this, in the embodiment of the present invention, the voice call state of the terminal under the GSM network in the simulated network environment is detected.
  • the terminal refers to the MT. After the terminal is powered on, the terminal performs the joint EPS/IMSI attachment.
  • the triggering terminal sends an attach request message (Attach Request) to the LTE base station, and receives the attach accept message sent by the LTE base station. (Attach Accept), wherein the attach accept message carries indication information for instructing the terminal to perform voice service by using a preset CSFB optimization scheme.
  • the terminal performing the CSFB process may be triggered by the terminal receiving the paging message (Paging) sent by the LTE base station.
  • Paging paging message
  • the MO first needs to initiate the call for the MT, and then the MT receives the paging message sent by the network side. .
  • the mobile services switching center (MSC) in the network sends the SGsAP-PAGING-REQUEST message according to the existing SGs association and Mobility Management Entity (MME) information.
  • MME Mobility Management Entity
  • the SGsAP-PAGING-REQUEST message carries the following information: IMSI, Temporary Mobile Subscriber Identity (TMSI), Service Indicator, Calling Number, and Location Area Information.
  • TMSI Temporary Mobile Subscriber Identity
  • Service Indicator Service Indicator
  • Calling Number Calling Number
  • Location Area Information The MME sends a paging message to the base station, and the base station initiates an air interface Paging process.
  • the UE establishes a connection and sends an Extended Service Request message to the MME.
  • the MME sends an SGsAP-SERVICE-REQUEST message to the MSC.
  • the MSC receives the message and does not resend the paging request message to the MME.
  • the MSC receives the SGs Service Request message containing the idle state indication, first notifying that the calling call is in the process of being connected.
  • the MME sends an Initial UE Context Setup message to the base station.
  • the Initial UE Context Setup message carries a CS Fallback Indicator
  • the CS Fallback Indicator is used to indicate that the base station UE needs to fall back to the UMTS Terrestrial Radio Access Network due to the CSFB service requirement (UTRAN, UMTS Terrestrial Radio Access Network). ) / GSM / EDGE Radio Access Network (GERAN, GSM EDGE Radio Access Network). .
  • the terminal in the process of performing the CSFB, receives a redirection command sent by the LTE base station, and the redirection command does not carry any redirection information.
  • the redirect command is also LTE_RRCConnectionRelease signaling.
  • the base station sends an R8 redirection command (rrcConnectionRelease_R8(0)) to the terminal, but the command does not carry the redirection information, thereby simulating an abnormal situation in which the EPC and the eNB are not synchronized. In this abnormal scenario, the terminal cannot be directed back to the target GSM cell through the process shown in FIG. 1.
  • the embodiment of the present invention determines the fall of the CSFB by detecting the voice call state of the terminal. Whether it succeeded, and thus also judged CSFB Is the optimization plan reasonable?
  • determining, by using the detected voice call state, that the CSFB is successfully dropped may include:
  • the simulation platform can detect whether the terminal initiates a channel request message (Channel Request) at the GSM layer.
  • a timer is first set, and timing is performed according to the preset duration, and it is detected whether the terminal sends a channel request message to the GSM cell before the timer expires.
  • the role of the timer is to prevent the detection time from being too long.
  • determining, by using the detected voice call state, that the CSFB is successfully dropped may include:
  • the terminal When the terminal sends a channel request message to the GSM cell and successfully establishes a voice call link, it is determined that the CSFB fallback is successful.
  • the method further includes:
  • the access request cause value carried in the channel request message is a preset value; for example, the preset value is LocationUpdate;
  • the terminal is controlled to continue to execute the CSFB process.
  • determining that the CSFB fallback result is successful includes:
  • the terminal When the terminal sends a channel request message to the GSM cell, and the access request cause value is the preset value, detecting whether the voice call link is successfully established;
  • the method further includes:
  • the access request cause value is parsed from the channel request message; and the access request cause value carried in the channel request message is determined to be a preset value; when the access request cause value is the preset value (ie, the correct access request cause value), the terminal is controlled to continue to execute the CSFB process.
  • CSFB fallback plan When the terminal does not send a channel request message to the GSM cell, that is, the CSFB fallback result is a fallback failure, and the preset CSFB optimization scheme used by the terminal is an unreasonable CSFB fallback scheme.
  • the case of the fallback failure includes the following two types: when the access request cause value is not the preset value, determining that the CSFB fallback fails; when the voice call link is not successfully established, determining The CSFB failed to fall back.
  • a CSFB fallback result detecting apparatus 5 comprising: a detecting portion 51 and a determining portion 52. ;among them,
  • the detecting part 51 is configured to detect a voice call state of the terminal in a global mobile communication system GSM network in a process of performing CSFB based on indication information indicating that the terminal performs voice service by using a preset CSFB optimization scheme;
  • the voice call in the GSM network is triggered when the redirection command sent by the LTE base station does not include the redirection information;
  • the determining portion 52 is configured to determine whether the CSFB is successfully dropped by using the detected voice call state
  • the indication information is carried in an attach accept message sent by the LTE base station to the terminal; the attach accept message is sent by the LTE base station after the terminal sends an attach request message to the LTE base station; the CSFB It is triggered when the terminal receives the paging message sent by the LTE base station.
  • each unit in the fallback result detecting device of the CSFB shown in FIG. 5 can be understood by referring to the related description of the CSFB fallback result detecting method.
  • the function of each unit in the fallback result detecting device of the CSFB shown in FIG. 5 can be realized by a program running on the processor, or can be realized by a specific logic circuit.
  • the determining portion 52 is configured to:
  • the determining portion 52 is configured to:
  • the terminal When the terminal sends a channel request message to the GSM cell and successfully establishes a voice call link, it is determined that the CSFB fallback is successful.
  • the determining portion 52 is further configured to:
  • the terminal is controlled to continue to execute the CSFB process.
  • determining portion 52 is configured to:
  • the terminal When the terminal sends a channel request message to the GSM cell, and the access request cause value is the preset value, detecting whether the voice call link is successfully established;
  • the determining portion 52 is further configured to:
  • the "part” may be a partial circuit, a partial processor, a partial program or software, etc., of course, may be a unit, a module, or a non-modular.
  • each component in the scheme shown in FIG. 5 may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software function module.
  • the integrated unit may be stored in a computer readable storage medium if it is implemented in the form of a software function module and is not sold or used as a stand-alone product.
  • the technical solution of the embodiment is essentially Said that the part contributing to the prior art or all or part of the technical solution can be embodied in the form of a software product stored in a storage medium, comprising a plurality of instructions for making a computer device (may It is a personal computer, a server, or a network device, etc. or a processor that performs all or part of the steps of the method described in this embodiment.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program codes.
  • the present embodiment provides a computer readable storage medium storing computer executable instructions that, when executed by a processor, implement the steps of the CSFB fall result detection method of the above-described embodiments of the present invention.
  • FIG. 6 is a specific hardware structure of a CSFB fallback result detecting apparatus 5 according to an embodiment of the present invention, which may include:
  • bus system 604 is used to implement connection communication between these components.
  • the bus system 604 includes a power bus, a control bus, and a status signal bus in addition to the data bus.
  • various buses are labeled as bus system 604 in FIG.
  • the network interface 601 is configured to receive and send signals during the process of transmitting and receiving information with other external network elements.
  • a memory 602 configured to store a computer program capable of running on the processor 603;
  • the processor 603 is configured to: when the computer program is run, execute:
  • the voice call state of the terminal in the global mobile communication system GSM network In the process of performing CSFB based on the indication information indicating that the terminal performs the voice service by using the preset CSFB optimization scheme, detecting the voice call state of the terminal in the global mobile communication system GSM network; the voice call of the terminal under the GSM network is Triggered when the redirection command sent by the LTE base station does not include the redirection information;
  • the indication information is carried in an attach accept message sent by the LTE base station to the terminal; the attach accept message is the terminal to the LTE base station
  • the LTE base station sends the attach request message, and the CSFB is triggered when the terminal receives the paging message sent by the LTE base station.
  • the memory 602 in the embodiments of the present invention may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be a read-only memory (ROM), a programmable read only memory (PROM), an erasable programmable read only memory (Erasable PROM, EPROM), or an electric Erase programmable read only memory (EEPROM) or flash memory.
  • Volatile memory can be random access memory (Random Access Memory, RAM), which is used as an external cache.
  • RAM Random Access Memory
  • RAM random access memory
  • SRAM static random access memory
  • DRAM dynamic random access memory
  • Synchronous DRAM synchronous dynamic random access memory
  • SDRAM Double Data Rate Synchronous Dynamic Random Access Memory
  • DDRSDRAM Double Data Rate Synchronous Dynamic Random Access Memory
  • ESDRAM Enhanced Synchronous Dynamic Random Access Memory
  • SDRAM Synchronous Connection Dynamic Random Access Memory
  • DRRAM direct memory bus random access memory
  • the processor 603 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the foregoing method may be completed by an integrated logic circuit of hardware in the processor 603 or an instruction in a form of software.
  • the processor 603 may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or the like. Programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps, and logical block diagrams disclosed in the embodiments of the present invention may be implemented or carried out.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented by the hardware decoding processor, or may be performed by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory 602, and the processor 603 reads the information in the memory 602 and completes the steps of the above method in combination with its hardware.
  • the embodiments described herein can be implemented in hardware, software, firmware, middleware, microcode, or a combination thereof.
  • the processing unit can be implemented in one One or more Application Specific Integrated Circuits (ASICs), Digital Signal Processing (DSP), Digital Signal Processing Equipment (DSP Device, DSPD), Programmable Logic Device (PLD) A Field-Programmable Gate Array (FPGA), a general purpose processor, a controller, a microcontroller, a microprocessor, other electronic units for performing the functions described herein, or a combination thereof.
  • ASICs Application Specific Integrated Circuits
  • DSP Digital Signal Processing
  • DSP Device Digital Signal Processing Equipment
  • PLD Programmable Logic Device
  • FPGA Field-Programmable Gate Array
  • general purpose processor a controller, a microcontroller, a microprocessor, other electronic units for performing the functions described herein, or a combination thereof.
  • the techniques described herein can be implemented by modules (eg, procedures, functions, and so on) that perform the functions described herein.
  • the software code can be stored in memory and executed by the processor.
  • the memory can be implemented in the processor or external to the processor.
  • the processor 603 is further configured to perform the step of the CSFB fallback result detecting method of the foregoing embodiment of the present invention when the computer program is run.
  • the disclosed method and apparatus may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner such as: multiple units or components may be combined, or Can be integrated into another system, or some features can be ignored or not executed.
  • the coupling, or direct coupling, or communication connection of the components shown or discussed may be indirect coupling or communication connection through some interfaces, devices or units, and may be electrical, mechanical or other forms. of.
  • the units described above as separate components may or may not be physically separated, and the components displayed as the unit may or may not be physical units, that is, may be located in one place or distributed to multiple network units; Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one second processing unit, or each unit may be separately used as one unit, or two or two.
  • the upper unit is integrated in one unit; the above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.
  • the embodiment of the present invention can detect the voice call state of the terminal under the GSM network in the CSFB process in the scenario where the network side sends the redirect command without the redirect information, thereby finally determining the CSFB fallback result, thereby further improving the CSFB.
  • the optimization scheme improves the probability of success of the CSFB process to enhance the user's calling experience.

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Abstract

Les modes de réalisation concernent un dispositif et un procédé de détection d'un résultat de reprise de CSFB, et un support de stockage informatique. Le procédé peut comprendre les étapes suivantes : pendant la réalisation d'un CSFB sur la base d'informations d'indication indiquant à un équipement utilisateur de réaliser un service vocal à l'aide d'un système d'optimisation CSFB prédéfini, détecter un état d'appel vocal de l'équipement utilisateur dans un réseau GSM, un appel vocal de l'équipement utilisateur dans le réseau GSM étant déclenché lorsqu'une instruction de redirection envoyée par une station de base d'une technologie d'évolution à long terme (LTE) ne comprend pas d'informations de redirection; et déterminer, à l'aide de l'état d'appel vocal détecté, si la reprise du CSFB est réussi, les informations d'indication étant transportées par un message d'acceptation de rattachement envoyé par la station de base LTE à l'équipement utilisateur, le message d'acceptation de rattachement étant envoyé par la station de base LTE après l'envoi par l'équipement utilisateur d'un message de demande de rattachement à la station de base LTE, et le CSFB étant déclenché et exécuté lorsque l'équipement utilisateur a reçu un message de radiomessagerie envoyé par la station de base LTE.
PCT/CN2017/104896 2017-09-30 2017-09-30 Dispositif et procédé de détection de résultat de reprise de csfb, et support de stockage informatique Ceased WO2019061453A1 (fr)

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PCT/CN2017/104896 WO2019061453A1 (fr) 2017-09-30 2017-09-30 Dispositif et procédé de détection de résultat de reprise de csfb, et support de stockage informatique
CN201780001921.1A CN108064461B (zh) 2017-09-30 2017-09-30 一种csfb的回落结果检测方法及装置、计算机存储介质

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