WO2019061425A1 - 一种csfb的回落结果检测方法及装置、计算机存储介质 - Google Patents

一种csfb的回落结果检测方法及装置、计算机存储介质 Download PDF

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Publication number
WO2019061425A1
WO2019061425A1 PCT/CN2017/104841 CN2017104841W WO2019061425A1 WO 2019061425 A1 WO2019061425 A1 WO 2019061425A1 CN 2017104841 W CN2017104841 W CN 2017104841W WO 2019061425 A1 WO2019061425 A1 WO 2019061425A1
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Prior art keywords
csfb
fallback
terminal
request message
result
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PCT/CN2017/104841
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English (en)
French (fr)
Inventor
曾元清
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深圳市云中飞网络科技有限公司
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Application filed by 深圳市云中飞网络科技有限公司 filed Critical 深圳市云中飞网络科技有限公司
Priority to PCT/CN2017/104841 priority Critical patent/WO2019061425A1/zh
Priority to CN201780002064.7A priority patent/CN108235826B/zh
Publication of WO2019061425A1 publication Critical patent/WO2019061425A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H04W68/02—Arrangements for increasing efficiency of notification or paging channel

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 MT in the CSFB process the occurrence of various abnormal conditions will probabilistically cause the CSFB process to fail, which may result in the call being unable to be connected. How to effectively detect the CSFB fallback result in an abnormal scenario is particularly necessary.
  • an embodiment of the present invention provides a CSFB fallback result detecting method and apparatus, and a computer storage medium.
  • the triggering terminal sends an attach request message to the LTE base station, and receives the attached message sent by the LTE base station. Receiving the message, 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 When the terminal receives the paging message sent by the LTE base station, the terminal controls the terminal to perform a CSFB process based on the indication information, where the terminal receives the redirect command sent by the LTE base station in the process of performing the CSFB
  • the redirection command does not carry the frequency point information of the target Global System for Mobile Communication (GSM) cell;
  • GSM Global System for Mobile Communication
  • the terminal When the terminal sends a channel request message to the GSM cell and successfully establishes a voice call link, determining that the CSFB fallback result is a fallback success; when the terminal does not send a channel request message to the GSM cell, determining the CSFB The result of the fallback is a fallback failure.
  • the method further includes:
  • 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 detecting whether the terminal sends a channel request message to a GSM cell includes:
  • a timer is set to detect whether the terminal sends a channel request message to the GSM cell before the timer expires.
  • the attaching unit is configured to trigger the terminal to send an attach request message to the LTE base station, and receive an attach accept message sent by the LTE base station, where the attach accept message carries a voice service for instructing the terminal to use a preset CSFB optimization scheme.
  • the CSFB fallback unit is configured to, when the terminal receives the paging message sent by the LTE base station, control the terminal to perform a CSFB process based on the indication information, where the terminal receives the LTE in the process of performing the CSFB a redirection command sent by the base station, where the redirection command does not carry the frequency point information of the GSM cell;
  • a detecting unit configured to detect, when the terminal performs CSFB, whether the terminal sends a channel request message to a GSM cell;
  • a result determining unit configured to: when the terminal sends a channel request message to the GSM cell and successfully establish a voice call link, determine that the CSFB fallback result is a fallback success; when the terminal does not send a channel request message to the GSM cell And determining that the CSFB fallback result is a fallback failure.
  • the device further includes:
  • the parsing unit is configured to parse the access request cause value from the channel request message when detecting that the terminal sends a channel request message to the GSM cell;
  • the determining unit is configured to determine whether the access request cause value carried in the channel request message is a preset value
  • the CSFB fallback unit is further configured to control the terminal to continue to execute the CSFB process when the access request cause value is the preset value.
  • the detecting unit is further configured to: 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 result determining unit is further configured to: when the voice call link is successfully established, determine that the CSFB fallback result is a fallback success.
  • the result determining unit is further configured to: when the access request cause value is not the preset value, determine that the CSFB fallback result is a fallback failure; when the voice call link is not When the establishment is successful, it is determined that the CSFB fallback result is a fallback failure.
  • the device further includes:
  • the detecting unit is further configured to detect whether the terminal sends a channel request message to the GSM cell before the timer expires.
  • the computer storage medium provided by the embodiment of the present invention has computer executable instructions stored thereon, and the computer executable instructions are implemented by the processor to implement the abnormal frequency detection method.
  • the triggering terminal sends an attach request message to the LTE base station, and receives an attach accept message sent by the LTE base station, where the attach accept message carries the preset CSFB optimization used by the terminal.
  • the scheme performs indication information of the voice service.
  • the terminal controls the terminal to perform a CSFB process based on the indication information, where the terminal receives the CSFB process.
  • a redirection command sent by the LTE base station where the redirection command does not carry the frequency point information of the target GSM cell; in the process of performing the CSFB by the terminal, detecting whether the terminal sends the GSM cell to the GSM cell Sending a channel request message; when the terminal sends a channel request message to the GSM cell and successfully establishes a voice call link, determining that the CSFB fallback result is a fallback success; when the terminal does not send a channel request message to the GSM cell, Determining the fallback result of the CSFB is a fallback failure.
  • the channel request result in the CSFB process can be detected in the scenario where the network side is configured to send the GSM cell information, thereby finally determining the CSFB fallback result, so that in the subsequent CSFB process.
  • the optimization scheme can be further improved to improve the probability of success of the CSFB process to enhance the user's calling experience.
  • FIG. 1 is a flowchart of channel acquisition according to an embodiment of the present invention
  • 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 first schematic structural diagram of a CSFB fallback result detecting apparatus according to an embodiment of the present invention.
  • FIG. 6 is a second schematic structural diagram 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 the appropriate The GSM cell performs access; 3) the UE reads the GSM cell system broadcast message and establishes a voice call.
  • the channel acquisition process is described below.
  • FIG. 1 is a flowchart of channel acquisition according to an embodiment of the present invention. 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 redirection command sent by the network side, where the redirection command carries the frequency information of the GMS cell.
  • the redirection command is implemented by LTE_RRCConnectionRelease signaling.
  • Step 104 The UE scans the frequency of the GSM cell based on the frequency information of the GMS cell carried in the redirection command, and selects a frequency point of the GSM cell for communication.
  • the frequency point of the selected GSM cell is referred to as a target frequency point.
  • Step 105 The UE sends a channel request message (CHANNEL_REQUEST) to the network based on the target frequency point.
  • CHANNEL_REQUEST a channel request message
  • the T3120 timer is started to count the number of retransmissions of CHANNEL_REQUEST 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 If the channel request of the terminal is answered, the terminal abandons the request attempt.
  • Step 106 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 CSFB fallback result in a scenario where the GSM cell information is sent and dropped on the network side.
  • the CSFB fallback result detecting method includes the following steps:
  • Step 201 The triggering terminal sends an attach request message to the LTE base station, and receives an attach accept message sent by the LTE base station, where the attach accept message carries an indication for indicating that the terminal uses the preset CSFB optimization scheme to perform voice service. information.
  • 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.
  • the network side is configured to allocate the cell information of the GSM. Since the network environment of the embodiment of the present invention is based on the simulation platform configuration, the CSFB abnormal scene with small probability in the network can be stably reproduced and verified. The feasibility and stability of the CSFB scheme are optimized, that is, the feasibility and stability of the CSFB optimization scheme under the cell information of the network side missed with GSM are verified.
  • 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.
  • Step 202 When the terminal receives the paging message sent by the LTE base station, the terminal is controlled to perform a CSFB process based on the indication information, where the terminal receives the LTE base station and sends the And a redirection command, where the redirection command does not carry the frequency point information of the target global mobile communication system GSM cell.
  • the terminal receives a paging message (Paging) sent by the network.
  • Paging paging message
  • the MO needs to initiate a call for the MT first, 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 including the idle state indication. First notify the calling party that the 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).
  • UTRAN UMTS Terrestrial 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, where the redirection command does not carry the frequency point information of the target GSM cell.
  • 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 frequency information of the target GSM cell. This abnormal scenario cannot guide the terminal to fall back to the target. GSM cell.
  • Step 203 In the process of performing CSFB by the terminal, detecting whether the terminal sends a channel request message to a GSM cell.
  • the simulation platform starts to detect whether the terminal initiates a channel request message (Channel Request) at the GSM layer.
  • Channel Request a channel request message
  • a timer is first set to detect 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.
  • Step 204 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 result is a fallback success; when the terminal does not send a channel request message to the GSM cell, determine The result of the CSFB fallback is a fallback failure.
  • the terminal When the terminal sends a channel request message to the GSM cell, parsing the access request cause value (cause) from the channel request message; determining whether the access request cause value carried in the channel request message is 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.
  • the terminal During the subsequent execution of the CSFB process, detecting whether the voice call link is successfully established; If the voice call link is successfully established, the result of the CSFB fallback is successful, that is, the preset CSFB optimization scheme adopted by the terminal is a reasonable CSFB fallback scheme.
  • 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 result is a fallback failure; when the voice call link is not established. Upon success, it is determined that the CSFB fallback result is a fallback failure.
  • FIG. 5 is a first schematic structural diagram of a CSFB fallback result detecting apparatus according to an embodiment of the present invention. As shown in FIG. 5, the CSFB fallback result detecting apparatus includes:
  • the attaching unit 501 is configured to trigger the terminal to send an attach request message to the LTE base station, and receive an attach accept message sent by the LTE base station, where the attach accept message carries the voice for instructing the terminal to use a preset CSFB optimization scheme. Instructions for the business;
  • the CSFB fallback unit 502 is configured to, when the terminal receives the paging message sent by the LTE base station, control the terminal to perform a CSFB process based on the indication information, where the terminal receives the CSFB process a redirection command sent by the LTE base station, where the redirection command does not carry the frequency point information of the GSM cell;
  • the detecting unit 503 is configured to detect, when the terminal performs the CSFB, whether the terminal sends a channel request message to the GSM cell;
  • the result determining unit 504 is configured to: when the terminal sends a channel request message to the GSM cell and successfully establish a voice call link, determine that the CSFB fallback result is a fallback success; when the terminal does not send a channel request message to the GSM cell At the same time, it is determined that the CSFB fallback result is a fallback failure.
  • 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 CSFB fallback result detecting device shown in FIG. 5 can be transmitted It is implemented by a program running on a processor, and can also be implemented by a specific logic circuit.
  • FIG. 6 is a schematic structural diagram of a CSFB fallback result detecting apparatus according to an embodiment of the present invention. As shown in FIG. 6, the CSFB fallback result detecting apparatus includes:
  • the attaching unit 601 is configured to: trigger the terminal to send an attach request message to the LTE base station, and receive an attach accept message sent by the LTE base station, where the attach accept message carries a voice for instructing the terminal to use a preset CSFB optimization scheme. Instructions for the business;
  • the CSFB fallback unit 602 is configured to, when the terminal receives the paging message sent by the LTE base station, control the terminal to perform a CSFB process based on the indication information, where the terminal receives the CSFB process a redirection command sent by the LTE base station, where the redirection command does not carry the frequency point information of the GSM cell;
  • the detecting unit 603 is configured to detect, when the terminal performs the CSFB, whether the terminal sends a channel request message to the GSM cell;
  • the result determining unit 604 is configured to: when the terminal sends a channel request message to the GSM cell and successfully establish a voice call link, determine that the CSFB fallback result is a fallback success; when the terminal does not send a channel request message to the GSM cell At the same time, it is determined that the CSFB fallback result is a fallback failure.
  • the device further includes:
  • the parsing unit 605 is configured to parse the access request cause value from the channel request message when detecting that the terminal sends a channel request message to the GSM cell;
  • the determining unit 606 is configured to determine whether the access request cause value carried in the channel request message is a preset value
  • the CSFB fallback unit 602 is further configured to control the terminal to continue to execute the CSFB process when the access request cause value is the preset value.
  • the detecting unit 603 is further configured to: 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 result determining unit 604 is further configured to: when the voice call link is successfully established, determine that the CSFB fallback result is a fallback success.
  • the result determining unit 604 is further configured to: when the access request cause value is not the preset value, determine that the CSFB fallback result is a fallback failure; when the voice call link is When the success is not established, it is determined that the CSFB fallback result is a fallback failure.
  • the device further includes:
  • the setting unit 607 is configured to set a timer
  • the detecting unit 603 is further configured to detect whether the terminal sends a channel request message to the GSM cell before the timer expires.
  • each unit in the fallback result detecting device of the CSFB shown in FIG. 6 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. 6 can be realized by a program running on the processor, or can be realized by a specific logic circuit.
  • the CSFB fallback result detecting device described above may be stored in a computer readable storage medium if it is implemented in the form of a software function module and sold or used as a stand-alone product.
  • the technical solution of the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product stored in a storage medium, including a plurality of instructions.
  • a computer device (which may be a personal computer, server, or network device, etc.) is caused to perform all or part of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read only memory (ROM), a magnetic disk, or an optical disk.
  • program codes such as a USB flash drive, a mobile hard disk, a read only memory (ROM), a magnetic disk, or an optical disk.
  • an embodiment of the present invention further provides a computer storage medium in which a calculation is stored.
  • the machine executable instructions when executed by the processor, implement the above-described CSFB fallback result detecting method of the embodiment of the present invention.
  • the disclosed method and smart device 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 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 hardware plus software functional units.

Abstract

本发明公开了一种CSFB的回落结果检测方法及装置、计算机存储介质，包括：当终端接收到LTE基站发送的寻呼消息时，控制所述终端执行CSFB过程，其中，在执行所述CSFB过程中，所述终端接收到LTE基站发送的重定向命令，所述重定向命令中未携带目标GSM小区的频点信息；在所述终端执行CSFB过程中，检测所述终端是否向GSM小区发送信道请求消息；当所述终端向GSM小区发送信道请求消息且成功建立语音通话链路时，确定所述CSFB的回落结果为回落成功；当所述终端未向GSM小区发送信道请求消息时，确定所述CSFB的回落结果为回落失败。

Description

一种CSFB的回落结果检测方法及装置、计算机存储介质 技术领域
本发明涉及电路域回落(CSFB，Circuit Switched Fallback)技术领域，尤其涉及一种CSFB的回落结果检测方法及装置、计算机存储介质。
背景技术
由于长期演进(LTE，Long Term Evolution)和2G/3G双模终端的无线通信是单一无线模式(Signal-radio mode)，因此，具有LTE和2G/3G接入能力的双模或者多模终端，在使用LTE接入时，无法传输2G/3G电路域业务信号。为了使终端(UE，User Equipment)在LTE接入或驻留下能够进行话音等电路域(CS，Circuit Switched)业务，并且能够对UE在LTE接入下正在进行的分组域(PS，Packet Switch)业务进行正确地处理，产生了CSFB技术。
在CSFB过程中，电话的发起者称为主叫(MO，Mobile Origination)，电话的接收者称为被叫(MT，Mobile Termination)，MO和MT各自对应有自己的CSFB信令流程。对于CSFB过程中的MT而言，由于各种异常情况的出现会概率性地导致CSFB过程失败，从而导致电话无法接通，如何有效检测异常场景下的CSFB的回落结果尤为必要。
发明内容
为解决上述技术问题，本发明实施例提供了一种CSFB的回落结果检测方法及装置、计算机存储介质。
本发明实施例提供的CSFB的回落结果检测方法包括：
触发终端向LTE基站发送附着请求消息，接收所述LTE基站发送的附 着接受消息，其中，所述附着接受消息携带用于指示所述终端采用预设的CSFB优化方案进行语音业务的指示信息；
当所述终端接收到LTE基站发送的寻呼消息时，控制所述终端基于所述指示信息执行CSFB过程，其中，在执行所述CSFB过程中，所述终端接收到LTE基站发送的重定向命令，所述重定向命令中未携带目标全球移动通信系统(GSM，Global System for Mobile Communication)小区的频点信息；
在所述终端执行CSFB过程中，检测所述终端是否向GSM小区发送信道请求消息；
当所述终端向GSM小区发送信道请求消息且成功建立语音通话链路时，确定所述CSFB的回落结果为回落成功；当所述终端未向GSM小区发送信道请求消息时，确定所述CSFB的回落结果为回落失败。
本发明实施例中，所述方法还包括：
当检测到所述终端向GSM小区发送信道请求消息时，从所述信道请求消息中解析出接入请求原因值；
判断所述信道请求消息携带的接入请求原因值是否为预设值；
当所述接入请求原因值为所述预设值时，控制所述终端继续执行CSFB过程。
本发明实施例中，所述当所述终端向GSM小区发送信道请求消息且成功建立语音通话链路时，确定所述CSFB的回落结果为回落成功，包括：
当所述终端向GSM小区发送信道请求消息，且所述接入请求原因值为所述预设值时，检测语音通话链路是否建立成功；
当所述语音通话链路建立成功时，确定所述CSFB的回落结果为回落成功。
本发明实施例中，所述方法还包括：
当所述接入请求原因值不是所述预设值时，确定所述CSFB的回落结果为回落失败；
当所述语音通话链路未建立成功时，确定所述CSFB的回落结果为回落失败。
本发明实施例中，所述检测所述终端是否向GSM小区发送信道请求消息，包括：
设置定时器，检测所述终端是否在所述定时器超时之前向GSM小区发送信道请求消息。
本发明实施例提供的CSFB的回落结果检测装置包括：
附着单元，配置为触发终端向LTE基站发送附着请求消息，接收所述LTE基站发送的附着接受消息，其中，所述附着接受消息携带用于指示所述终端采用预设的CSFB优化方案进行语音业务的指示信息；
CSFB回落单元，配置为当所述终端接收到LTE基站发送的寻呼消息时，控制所述终端基于所述指示信息执行CSFB过程，其中，在执行所述CSFB过程中，所述终端接收到LTE基站发送的重定向命令，所述重定向命令中未携带GSM小区的频点信息；
检测单元，配置为在所述终端执行CSFB过程中，检测所述终端是否向GSM小区发送信道请求消息；
结果确定单元，配置为当所述终端向GSM小区发送信道请求消息且成功建立语音通话链路时，确定所述CSFB的回落结果为回落成功；当所述终端未向GSM小区发送信道请求消息时，确定所述CSFB的回落结果为回落失败。
本发明实施例中，所述装置还包括：
解析单元，配置为当检测到所述终端向GSM小区发送信道请求消息时，从所述信道请求消息中解析出接入请求原因值；
判断单元，配置为判断所述信道请求消息携带的接入请求原因值是否为预设值；
所述CSFB回落单元，还配置为当所述接入请求原因值为所述预设值时，控制所述终端继续执行CSFB过程。
本发明实施例中，所述检测单元，还配置为当所述终端向GSM小区发送信道请求消息，且所述接入请求原因值为所述预设值时，检测语音通话链路是否建立成功；
所述结果确定单元，还配置为当所述语音通话链路建立成功时，确定所述CSFB的回落结果为回落成功。
本发明实施例中，所述结果确定单元，还配置为当所述接入请求原因值不是所述预设值时，确定所述CSFB的回落结果为回落失败；当所述语音通话链路未建立成功时，确定所述CSFB的回落结果为回落失败。
本发明实施例中，所述装置还包括：
设置单元，配置为设置定时器；
所述检测单元，还配置为检测所述终端是否在所述定时器超时之前向GSM小区发送信道请求消息。
本发明实施例提供的计算机存储介质，其上存储有计算机可执行指令，该计算机可执行指令被处理器执行时实现上述的异常频点的检测方法。
本发明实施例的技术方案中，触发终端向LTE基站发送附着请求消息，接收所述LTE基站发送的附着接受消息，其中，所述附着接受消息携带用于指示所述终端采用预设的CSFB优化方案进行语音业务的指示信息；当所述终端接收到LTE基站发送的寻呼消息时，控制所述终端基于所述指示信息执行CSFB过程，其中，在执行所述CSFB过程中，所述终端接收到LTE基站发送的重定向命令，所述重定向命令中未携带目标GSM小区的频点信息；在所述终端执行CSFB过程中，检测所述终端是否向GSM小区发 送信道请求消息；当所述终端向GSM小区发送信道请求消息且成功建立语音通话链路时，确定所述CSFB的回落结果为回落成功；当所述终端未向GSM小区发送信道请求消息时，确定所述CSFB的回落结果为回落失败。采用本发明实施例的技术方案，能够在网络侧漏配下发GSM小区信息的场景下检测出CSFB过程中的信道请求结果，从而最终确定出CSFB的回落结果，这样，在后续进行CSFB的过程中，可以进一步完善优化方案来提高CSFB过程成功的概率，以提升用户的呼叫体验。
附图说明
图1为本发明实施例的信道获取流程图；
图2为本发明实施例提供的CSFB的回落结果检测方法的流程示意图；
图3为本发明实施例的仿真代码的示意图一；
图4为本发明实施例的仿真代码的示意图二；
图5为本发明实施例的CSFB的回落结果检测装置的结构组成示意图一；
图6为本发明实施例的CSFB的回落结果检测装置的结构组成示意图二。
具体实施方式
为了能够更加详尽地了解本发明实施例的特点与技术内容，下面结合附图对本发明实施例的实现进行详细阐述，所附附图仅供参考说明之用，并非用来限定本发明实施例。
正常情况下，具有CSFB功能的终端开机能够搜索LTE网络，完成LTE/2G网络联合注册，并能够进行语音主叫及被叫。
CSFB过程包括三个阶段：1)UE在LTE网络发起呼叫(对应于MO)，或者接收寻呼(对应于MT)；2)UE在LTE网络指引下回落并搜索合适的 GSM小区进行接入；3)UE读取GSM小区系统广播消息并建立语音通话。
此外，CSFB过程中的比较重要的一个过程是信道获取过程，以下对信道获取过程进行阐述。
图1为本发明实施例的信道获取流程图，如图1所示，所述信道获取流程包括以下步骤：
步骤101：UE开机，并执行联合演进分组系统(EPS，Evolved Packet System)/国际移动用户识别码(IMSI，International Mobile Subscriber Identification Number)附着。
步骤102：UE接收到CS寻呼消息，开始执行CSFB过程。
步骤103：UE接收到网络侧下发的重定向命令，在重定向命令中携带GMS小区的频点信息。
这里，重定向命令通过LTE_RRCConnectionRelease信令来实现。
步骤104：UE基于重定向命令中携带的GMS小区的频点信息，扫描GSM小区的频点，并选择出一个GSM小区的频点用于进行通信。
这里，将所选择出的GSM小区的频点称为目标频点。
步骤105：UE基于所述目标频点，向网络发送信道请求消息(CHANNEL_REQUEST)。
这里，终端初次发送CHANNEL_REQUEST后，启动T3120定时器以统计通过随机接入过程重发CHANNEL_REQUEST的次数，并预设了最大重发次数。当定时器T3120逾时且达到“最大重发次数”时，终端将启动T3126定时器以对终端静默不发CHANNEL_REQUEST的时间进行计时；如果T3126定时器逾时(达到计时的时间)网络仍没有对终端的信道请求有应答，则终端放弃请求尝试。
步骤106：UE接收网络回复的IM消息，通过IM消息获得网络分配的信道。
随着LTE基站规模不断地扩大，以及部分旧的GSM/TDSCDMA基站的退网和重耕，原有的网络部署在基站信令侧的配置并未实时更新，出现了网络下发给UE的配置信息和实际的部署情况不一致，从而导致CSFB这种跨系统(InterRAT)的语音通话出现各种异常情况，比如无法接通，重复连接失败等。
为解决此类因网络部署不兼容状况而带来的通话问题，各终端厂商采用了各种优化手段来提高通话体验，为验证CSFB优化方案的合理性，有必要对异常场景下的CSFB过程进行检测，以便针对性地完善CSFB优化方案。
CSFB回落方案采用3GPP R8重定向回落方案，在CSFB部署过程中，因参数配置的问题会概率性地导致CSFB过程出现异常。为此，本发明实施例提供了一种在网路侧漏配下发GSM小区信息的场景下，CSFB回落结果的检测方法。
图2为本发明实施例提供的CSFB的回落结果检测方法的流程示意图，如图2所示，所述CSFB的回落结果检测方法包括以下步骤：
步骤201：触发终端向LTE基站发送附着请求消息，接收所述LTE基站发送的附着接受消息，其中，所述附着接受消息携带用于指示所述终端采用预设的CSFB优化方案进行语音业务的指示信息。
本发明实施例中，可以通过仿真平台构造一个网络环境，包括：TDD-LTE小区、TDSCDMA/GSM小区，本实施例以GSM小区作为实现CS语音的小区，其中，在LTE SIB中配置GSM邻区小区信息，在GSM SI中配置LTE邻区小区信息。而后，基于构造的网络环境执行CSFB过程。
本发明实施例的技术方案，在CSFB过程中配置如下异常场景：网络侧漏配下发GSM的小区信息。由于本发明实施例的网络环境是基于仿真平台构造，因此能稳定复现出网络中小概率出现的CSFB异常场景，并验证 优化CSFB方案的可行性以及稳定性，也即：验证网络侧漏配GSM的小区信息下的CSFB优化方案的可行性以及稳定性。
本发明实施例中，终端是指MT，终端开机后，首先执行联合EPS/IMSI附着，这其中包括触发终端向LTE基站发送附着请求消息(Attach Request)，接收所述LTE基站发送的附着接受消息(Attach Accept)，其中，所述附着接受消息携带用于指示所述终端采用预设的CSFB优化方案进行语音业务的指示信息。图3为本发明实施例的仿真代码的示意图一，其中：IMS voice over PS(V)＝Not supported(0)，代表指示信息。
步骤202：当所述终端接收到LTE基站发送的寻呼消息时，控制所述终端基于所述指示信息执行CSFB过程，其中，在执行所述CSFB过程中，所述终端接收到LTE基站发送的重定向命令，所述重定向命令中未携带目标全球移动通信系统GSM小区的频点信息。
本发明实施例中，终端接收到网络侧下发的寻呼消息(Paging)。这里，需要MO首先发起针对MT的呼叫，而后，MT才接收到网络侧下发的寻呼消息。
具体地，网络中的移动业务交换中心(MSC)收到初始地址请求(IAM)入局消息后，根据存在的SGs关联和移动管理实体(MME，Mobility Management Entity)信息，发送SGsAP-PAGING-REQUEST消息给MME，这里，SGsAP-PAGING-REQUEST消息携带如下信息：IMSI、临时移动用户标识(TMSI，Temporary Mobile Subscriber Identity)、业务标识(Service indicator)、主叫号码、位置区信息。MME发送寻呼(Paging)消息给基站，基站发起空口的Paging流程。UE建立连接并发送Extended Service Request消息给MME，MME发送SGsAP-SERVICE-REQUEST消息给MSC，MSC收到此消息，不再向MME重发寻呼请求消息。为避免呼叫接续过程中，主叫等待时间过长，MSC收到包含空闲态指示的SGs Service Request消息， 先通知主叫呼叫正在接续过程中。MME发送Initial UE Context Setup消息给基站，这里，Initial UE Context Setup消息携带CS Fallback Indicator，CS Fallback Indicator用于指示基站UE因CSFB业务需要回落到UMTS陆地无线接入网(UTRAN，UMTS Terrestrial Radio Access Network)/GSM/EDGE无线接入网(GERAN，GSM EDGE Radio Access Network)。
本发明实施例中，在执行所述CSFB过程中，所述终端接收到LTE基站发送的重定向命令，所述重定向命令中未携带目标GSM小区的频点信息。这里，重定向命令也即是LTE_RRCConnectionRelease信令。如图4所示，仿真代码识中，基站下发R8重定向命令(rrcConnectionRelease_R8(0))给终端，但是该命令不携带目标GSM小区的频点信息，这种异常场景无法指引终端回落至目标GSM小区。
步骤203：在所述终端执行CSFB过程中，检测所述终端是否向GSM小区发送信道请求消息。
本发明实施例中，仿真平台开始在GSM层检测终端是否发起信道请求消息(Channel Request)。
这里，首先设置定时器，检测所述终端是否在所述定时器超时之前向GSM小区发送信道请求消息。这里，定时器的作用是防止检测时间过长。
步骤204：当所述终端向GSM小区发送信道请求消息且成功建立语音通话链路时，确定所述CSFB的回落结果为回落成功；当所述终端未向GSM小区发送信道请求消息时，确定所述CSFB的回落结果为回落失败。
当所述终端向GSM小区发送信道请求消息时，从所述信道请求消息中解析出接入请求原因值(cause)；判断所述信道请求消息携带的接入请求原因值是否为预设值；当所述接入请求原因值为所述预设值(即正确的接入请求原因值)时，控制所述终端继续执行CSFB过程。
在后续执行CSFB过程的过程中，检测语音通话链路是否建立成功； 如果成功建立语音通话链路，则代表CSFB的回落结果为回落成功，也即终端采用的预设的CSFB优化方案为合理的CSFB回落方案。当所述终端未向GSM小区发送信道请求消息时，也即CSFB的回落结果为回落失败，代表终端采用的预设的CSFB优化方案为不合理的CSFB回落方案。
上述方案中，回落失败的情况还包括如下两种：当所述接入请求原因值不是所述预设值时，确定所述CSFB的回落结果为回落失败；当所述语音通话链路未建立成功时，确定所述CSFB的回落结果为回落失败。
图5为本发明实施例的CSFB的回落结果检测装置的结构组成示意图一，如图5所示，所述CSFB的回落结果检测装置包括：
附着单元501，配置为触发终端向LTE基站发送附着请求消息，接收所述LTE基站发送的附着接受消息，其中，所述附着接受消息携带用于指示所述终端采用预设的CSFB优化方案进行语音业务的指示信息；
CSFB回落单元502，配置为当所述终端接收到LTE基站发送的寻呼消息时，控制所述终端基于所述指示信息执行CSFB过程，其中，在执行所述CSFB过程中，所述终端接收到LTE基站发送的重定向命令，所述重定向命令中未携带GSM小区的频点信息；
检测单元503，配置为在所述终端执行CSFB过程中，检测所述终端是否向GSM小区发送信道请求消息；
结果确定单元504，配置为当所述终端向GSM小区发送信道请求消息且成功建立语音通话链路时，确定所述CSFB的回落结果为回落成功；当所述终端未向GSM小区发送信道请求消息时，确定所述CSFB的回落结果为回落失败。
本领域技术人员应当理解，图5所示的CSFB的回落结果检测装置中的各单元的实现功能可参照前述CSFB的回落结果检测方法的相关描述而理解。图5所示的CSFB的回落结果检测装置中的各单元的功能可通过运 行于处理器上的程序而实现，也可通过具体的逻辑电路而实现。
图6为本发明实施例的CSFB的回落结果检测装置的结构组成示意图二，如图6所示，所述CSFB的回落结果检测装置包括：
附着单元601，配置为触发终端向LTE基站发送附着请求消息，接收所述LTE基站发送的附着接受消息，其中，所述附着接受消息携带用于指示所述终端采用预设的CSFB优化方案进行语音业务的指示信息；
CSFB回落单元602，配置为当所述终端接收到LTE基站发送的寻呼消息时，控制所述终端基于所述指示信息执行CSFB过程，其中，在执行所述CSFB过程中，所述终端接收到LTE基站发送的重定向命令，所述重定向命令中未携带GSM小区的频点信息；
检测单元603，配置为在所述终端执行CSFB过程中，检测所述终端是否向GSM小区发送信道请求消息；
结果确定单元604，配置为当所述终端向GSM小区发送信道请求消息且成功建立语音通话链路时，确定所述CSFB的回落结果为回落成功；当所述终端未向GSM小区发送信道请求消息时，确定所述CSFB的回落结果为回落失败。
本发明实施例中，所述装置还包括：
解析单元605，配置为当检测到所述终端向GSM小区发送信道请求消息时，从所述信道请求消息中解析出接入请求原因值；
判断单元606，配置为判断所述信道请求消息携带的接入请求原因值是否为预设值；
所述CSFB回落单元602，还配置为当所述接入请求原因值为所述预设值时，控制所述终端继续执行CSFB过程。
本发明实施例中，所述检测单元603，还配置为当所述终端向GSM小区发送信道请求消息，且所述接入请求原因值为所述预设值时，检测 语音通话链路是否建立成功；
所述结果确定单元604，还配置为当所述语音通话链路建立成功时，确定所述CSFB的回落结果为回落成功。
本发明实施例中，所述结果确定单元604，还配置为当所述接入请求原因值不是所述预设值时，确定所述CSFB的回落结果为回落失败；当所述语音通话链路未建立成功时，确定所述CSFB的回落结果为回落失败。
本发明实施例中，所述装置还包括：
设置单元607，配置为设置定时器；
所述检测单元603，还配置为检测所述终端是否在所述定时器超时之前向GSM小区发送信道请求消息。
本领域技术人员应当理解，图6所示的CSFB的回落结果检测装置中的各单元的实现功能可参照前述CSFB的回落结果检测方法的相关描述而理解。图6所示的CSFB的回落结果检测装置中的各单元的功能可通过运行于处理器上的程序而实现，也可通过具体的逻辑电路而实现。
本发明实施例上述的CSFB的回落结果检测装置如果以软件功能模块的形式实现并作为独立的产品销售或使用时，也可以存储在一个计算机可读取存储介质中。基于这样的理解，本发明实施例的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机、服务器、或者网络设备等)执行本发明各个实施例所述方法的全部或部分。而前述的存储介质包括：U盘、移动硬盘、只读存储器(ROM，Read Only Memory)、磁碟或者光盘等各种可以存储程序代码的介质。这样，本发明实施例不限制于任何特定的硬件和软件结合。
相应地，本发明实施例还提供一种计算机存储介质，其中存储有计算 机可执行指令，该计算机可执行指令被处理器执行时实现本发明实施例的上述的CSFB的回落结果检测方法。
本发明实施例所记载的技术方案之间，在不冲突的情况下，可以任意组合。
在本发明所提供的几个实施例中，应该理解到，所揭露的方法和智能设备，可以通过其它的方式实现。以上所描述的设备实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，如：多个单元或组件可以结合，或可以集成到另一个系统，或一些特征可以忽略，或不执行。另外，所显示或讨论的各组成部分相互之间的耦合、或直接耦合、或通信连接可以是通过一些接口，设备或单元的间接耦合或通信连接，可以是电性的、机械的或其它形式的。
上述作为分离部件说明的单元可以是、或也可以不是物理上分开的，作为单元显示的部件可以是、或也可以不是物理单元，即可以位于一个地方，也可以分布到多个网络单元上；可以根据实际的需要选择其中的部分或全部单元来实现本实施例方案的目的。
另外，在本发明各实施例中的各功能单元可以全部集成在一个第二处理单元中，也可以是各单元分别单独作为一个单元，也可以两个或两个以上单元集成在一个单元中；上述集成的单元既可以采用硬件的形式实现，也可以采用硬件加软件功能单元的形式实现。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。

Claims (11)

  1. 一种电路域回落CSFB的回落结果检测方法，所述方法包括：
    触发终端向长期演进LTE基站发送附着请求消息，接收所述LTE基站发送的附着接受消息，其中，所述附着接受消息携带用于指示所述终端采用预设的CSFB优化方案进行语音业务的指示信息；
    当所述终端接收到LTE基站发送的寻呼消息时，控制所述终端基于所述指示信息执行CSFB过程，其中，在执行所述CSFB过程中，所述终端接收到LTE基站发送的重定向命令，所述重定向命令中未携带目标全球移动通信系统GSM小区的频点信息；
    在所述终端执行CSFB过程中，检测所述终端是否向GSM小区发送信道请求消息；
    当所述终端向GSM小区发送信道请求消息且成功建立语音通话链路时，确定所述CSFB的回落结果为回落成功；当所述终端未向GSM小区发送信道请求消息时，确定所述CSFB的回落结果为回落失败。
  2. 根据权利要求1所述的CSFB的回落结果检测方法，其中，所述方法还包括：
    当检测到所述终端向GSM小区发送信道请求消息时，从所述信道请求消息中解析出接入请求原因值；
    判断所述信道请求消息携带的接入请求原因值是否为预设值；
    当所述接入请求原因值为所述预设值时，控制所述终端继续执行CSFB过程。
  3. 根据权利要求2所述的CSFB的回落结果检测方法，其中，所述当所述终端向GSM小区发送信道请求消息且成功建立语音通话链路时，确定所述CSFB的回落结果为回落成功，包括：
    当所述终端向GSM小区发送信道请求消息，且所述接入请求原因值 为所述预设值时，检测语音通话链路是否建立成功；
    当所述语音通话链路建立成功时，确定所述CSFB的回落结果为回落成功。
  4. 根据权利要求3所述的CSFB的回落结果检测方法，其中，所述方法还包括：
    当所述接入请求原因值不是所述预设值时，确定所述CSFB的回落结果为回落失败；
    当所述语音通话链路未建立成功时，确定所述CSFB的回落结果为回落失败。
  5. 根据权利要求1至4任一项所述的CSFB的回落结果检测方法，其中，所述检测所述终端是否向GSM小区发送信道请求消息，包括：
    设置定时器，检测所述终端是否在所述定时器超时之前向GSM小区发送信道请求消息。
  6. 一种CSFB的回落结果检测装置，所述装置包括：
    附着单元，配置为触发终端向LTE基站发送附着请求消息，接收所述LTE基站发送的附着接受消息，其中，所述附着接受消息携带用于指示所述终端采用预设的CSFB优化方案进行语音业务的指示信息；
    CSFB回落单元，配置为当所述终端接收到LTE基站发送的寻呼消息时，控制所述终端基于所述指示信息执行CSFB过程，其中，在执行所述CSFB过程中，所述终端接收到LTE基站发送的重定向命令，所述重定向命令中未携带GSM小区的频点信息；
    检测单元，配置为在所述终端执行CSFB过程中，检测所述终端是否向GSM小区发送信道请求消息；
    结果确定单元，配置为当所述终端向GSM小区发送信道请求消息且成功建立语音通话链路时，确定所述CSFB的回落结果为回落成功；当 所述终端未向GSM小区发送信道请求消息时，确定所述CSFB的回落结果为回落失败。
  7. 根据权利要求6所述的CSFB的回落结果检测装置，其中，所述装置还包括：
    解析单元，配置为当检测到所述终端向GSM小区发送信道请求消息时，从所述信道请求消息中解析出接入请求原因值；
    判断单元，配置为判断所述信道请求消息携带的接入请求原因值是否为预设值；
    所述CSFB回落单元，还配置为当所述接入请求原因值为所述预设值时，控制所述终端继续执行CSFB过程。
  8. 根据权利要求7所述的CSFB的回落结果检测装置，其中，
    所述检测单元，还配置为当所述终端向GSM小区发送信道请求消息，且所述接入请求原因值为所述预设值时，检测语音通话链路是否建立成功；
    所述结果确定单元，还配置为当所述语音通话链路建立成功时，确定所述CSFB的回落结果为回落成功。
  9. 根据权利要求8所述的CSFB的回落结果检测装置，其中，
    所述结果确定单元，还配置为当所述接入请求原因值不是所述预设值时，确定所述CSFB的回落结果为回落失败；当所述语音通话链路未建立成功时，确定所述CSFB的回落结果为回落失败。
  10. 根据权利要求6至9任一项所述的CSFB的回落结果检测装置，其中，所述装置还包括：
    设置单元，配置为设置定时器；
    所述检测单元，还配置为检测所述终端是否在所述定时器超时之前向GSM小区发送信道请求消息。
  11. 一种计算机存储介质，其上存储有计算机可执行指令，该计算机可执行指令被处理器执行时实现权利要求1-5任一项所述的方法步骤。
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