WO2023116056A1 - 通话处理方法及装置 - Google Patents

通话处理方法及装置 Download PDF

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Publication number
WO2023116056A1
WO2023116056A1 PCT/CN2022/117563 CN2022117563W WO2023116056A1 WO 2023116056 A1 WO2023116056 A1 WO 2023116056A1 CN 2022117563 W CN2022117563 W CN 2022117563W WO 2023116056 A1 WO2023116056 A1 WO 2023116056A1
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WIPO (PCT)
Prior art keywords
cell
call
tracking area
network
electronic device
Prior art date
Application number
PCT/CN2022/117563
Other languages
English (en)
French (fr)
Inventor
李海波
薛超
Original Assignee
荣耀终端有限公司
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by 荣耀终端有限公司 filed Critical 荣耀终端有限公司
Priority to EP22909379.4A priority Critical patent/EP4340450A1/en
Publication of WO2023116056A1 publication Critical patent/WO2023116056A1/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
    • H04W36/0022—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies
    • H04W36/00222—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies between different packet switched [PS] network technologies, e.g. transferring data sessions between LTE and WLAN or LTE and 5G
    • 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
    • H04W36/0022—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies
    • 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
    • H04W36/0066—Transmission or use of information for re-establishing the radio link of control information between different types of networks in order to establish a new radio link in the target network
    • 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
    • H04W36/0079—Transmission or use of information for re-establishing the radio link in case of hand-off failure or rejection
    • 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

Definitions

  • the present application relates to the technical field of communications, and in particular to a call processing method and device.
  • 5G New Radio 5G New Radio, 5G NR
  • NR 5G New Radio
  • LTE Long Term Evolution
  • 4G network 4G network
  • EPS FB Emergency procedures Fallback
  • This application provides a call processing method and device, the purpose of which is to improve the success rate of EPS FB call establishment.
  • the first aspect of the present application provides a call processing method, which is applied to an electronic device.
  • the called or calling electronic device After being redirected from the 5G network to the LTE network, the called or calling electronic device resides in the first cell of the LTE network.
  • the cell belongs to the tracking area, and the method includes: after the tracking area update fails, in response to identifying an abnormal signaling flow, searching for an available cell that does not belong to the tracking area, and initiating a tracking area update in the available cell to try to establish a call.
  • the identification of abnormal signaling flow indicates that the tracking area update may fail because the signaling is not sent. Therefore, trying to establish a call in an available cell that does not belong to the tracking area can increase the possibility of successfully establishing a call after being redirected from the 5G network to the LTE network. sex.
  • identifying the abnormal signaling flow includes: identifying multiple retransmissions of the same signaling; or identifying that the signaling has not been sent successfully. Multiple retransmissions of the same signaling and unsuccessful sending of signaling are common reasons for tracking area update failures. Therefore, the above two specific situations of abnormal signaling flow can further improve the success of establishing a network after being redirected from a 5G network to an LTE network. Possibility of calling.
  • it before searching for an available cell that does not belong to the tracking area in response to identifying the abnormal signaling flow, it further includes: adding the tracking area code to the rejection list.
  • the method further includes: triggering re-registration on the 5G network in response to not finding the available cell. Re-registration can clear the deny list, thereby improving the possibility of successfully establishing a call after redirecting from the 5G network to the LTE network next time.
  • it before triggering re-registration on the 5G network, it further includes: initiating a tracking area update in a cell belonging to the tracking area to try to establish the call, so as to establish the call as much as possible, thereby increasing the possibility of successfully establishing the call.
  • the available cell after the available cell initiates the tracking area update, it also includes: in response to the successful establishment of the call, recording the available cell as the preferred cell to provide convenience and basis for the selection of the subsequent camping cell, because the preferred cell is the call establishment A successful cell, so it can further improve the possibility of successfully establishing a subsequent call.
  • the available cell after the available cell initiates the tracking area update, it also includes: adding the first cell to the blacklist in response to the failure of the tracking area update, so as to provide convenience and basis for the selection of the subsequent camping cell, which can further improve the quality of subsequent calls. probability of successful establishment.
  • after the clearing of the rejection list it further includes: after being called again or initiating a calling again and being redirected from the 5G network to the LTE network, camping on the second cell of LTE, the first The second cell is not in the blacklist and is a preferred cell, and the call is established in the second cell, so as to further increase the possibility of successfully establishing the call.
  • the second aspect of the present application provides a call processing method, which is applied to an electronic device. After the called or calling electronic device is redirected from the 5G network to the LTE network, the called or calling fails.
  • the method includes: The tracking areas to which the selected cells belong are all in the rejection list, and the first cell is selected from the cells belonging to the tracking areas in the rejection list, and a tracking area update is initiated in the selected first cell to try to establish a call.
  • the tracking area to which the first cell belongs belongs to the reject list, there is still the possibility of successfully establishing a call in the first cell. Therefore, trying to establish a call in the first cell belonging to the tracking area belonging to the reject list can maximize the chance of successfully establishing a call. possibility.
  • the method before selecting the first cell among the cells subordinate to the tracking areas in the rejection list, the method further includes: adding the tracking area code to the rejection list after the tracking area update fails.
  • the third aspect of the present application provides an electronic device, including: a memory and at least one processor; the memory is used to store an application program, and the at least one processor is used to execute the application program, so as to realize the first aspect of the present application Aspect or the call processing method described in the second aspect.
  • a fourth aspect of the present application provides a computer storage medium for storing a computer program, and when the computer program is executed, it is specifically used to implement the call processing method described in the first aspect or the second aspect.
  • a fifth aspect of the present application provides a computer program product, which causes the computer to execute the call processing method described in the first aspect or the second aspect when the computer program product is run on a computer.
  • Figure 1a is an example diagram of a 5G network and a 4G network covering the same area
  • Figure 1b is an example diagram of a mobile phone talking under the coverage of a 4G network
  • Figure 2 is a flow chart of the call not successfully established after falling back from the 5G network to the 4G network;
  • FIG. 3 is a flowchart of a call processing method disclosed in an embodiment of the present application.
  • FIG. 4 is a flow chart of another call processing method disclosed in the embodiment of the present application.
  • FIG. 5 is a flowchart of another call processing method disclosed in the embodiment of the present application.
  • FIG. 6 is a flowchart of another call processing method disclosed in the embodiment of the present application.
  • FIG. 7 is an example diagram of a hardware structure of an electronic device disclosed in an embodiment of the present application.
  • FIG. 8 is an exemplary diagram of a software framework of an electronic device disclosed in an embodiment of the present application.
  • one or more refers to one, two or more than two; "and/or” describes the association relationship of associated objects, indicating that there may be three types of relationships; for example, A and/or B may mean: A exists alone, A and B exist simultaneously, and B exists alone, wherein A and B may be singular or plural.
  • the character "/" generally indicates that the contextual objects are an "or" relationship.
  • references to "one embodiment” or “some embodiments” or the like in this specification means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application.
  • appearances of the phrases “in one embodiment,” “in some embodiments,” “in other embodiments,” “in other embodiments,” etc. in various places in this specification are not necessarily All refer to the same embodiment, but mean “one or more but not all embodiments” unless specifically stated otherwise.
  • the terms “including”, “comprising”, “having” and variations thereof mean “including but not limited to”, unless specifically stated otherwise.
  • a plurality referred to in the embodiment of the present application means greater than or equal to two. It should be noted that in the description of the embodiments of the present application, words such as “first” and “second” are only used to distinguish the purpose of description, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or imply order.
  • the user does not make or receive a call.
  • the mobile phone usually resides in a cell of the 5G network (of course, it can also reside in a cell of the LTE network).
  • the mobile phone and 5G base station connection which means that the mobile phone usually resides in the cell of the 5G network.
  • the mobile phone needs to be switched to the LTE network, that is, the mobile phone can only make or receive calls in the LTE network.
  • the mobile phone is connected to the 4G base station, indicating that the mobile phone resides in a cell of the 4G network.
  • the inventor found in the process of research that during the EPS FB process, after the terminal is redirected from the 5G network to the 4G network, the call success rate needs to be improved.
  • the situation of the mobile phone being called is similar.
  • the peer mobile phone and the local mobile phone cannot successfully establish a call process in the current call and the next call. Connected" prompt tone.
  • the mobile phone is called as an example, including the following steps:
  • the core network After receiving a mobile terminated call (Mobile Terminated Call, MT call) message, the core network forwards the MT call message to the NR.
  • a mobile terminated call Mobile Terminated Call, MT call
  • NR refers to a wireless access device of a 5G network.
  • the NR sends an invite (invite) message to the user equipment (User Equipment, UE) in response to the MT call message.
  • invite invite
  • UE User Equipment
  • the invite message usually carries a message body, which includes the media information of the calling party, and may also include other session information, such as a resource list.
  • the UE After receiving the invite message, the UE sends a response message 100 Trying and a session_progress (SESSION_PROGRESS) message to the NR (183).
  • SESSION_PROGRESS session_progress
  • the core network sends a message to trigger the EPS FB to the NR in response to the response message 100 Trying and the SESSION_PROGRESS message (183).
  • message interaction is performed between the core network and NR to confirm the activation of the EPS FB.
  • S105 is a triggering step for message interaction.
  • message interaction please refer to the communication protocol, which will not be repeated here.
  • the NR sends a redirection message to the UE.
  • the redirection message is used to redirect the UE to the LTE network, and the redirection message includes the frequency point identifier of the LTE network.
  • the frequency point identifier is an example of a frequency point number.
  • the UE searches for a suitable LTE cell by using the LTE frequency point number.
  • the UE After camping on a suitable LTE cell, the UE sends a tracking area update request message (Tracking Area Update Request Mag) to the LTE.
  • a tracking area update request message Tracking Area Update Request Mag
  • LTE refers to a wireless access device of a 4G network.
  • the UE After the UE camps on a suitable LTE cell, it initiates a tracking area update (Tracking Area Update, TAU) procedure.
  • TAU Tracking Area Update
  • the LTE sends a tracking area update request message to the core network.
  • the core network sends a non-access stratum (non-access stratum, NAS) security mode command message (Security Mode Command Msg) to the LTE in response to the tracking area update request message.
  • NAS non-access stratum
  • Security Mode Command Msg Security Mode Command
  • the tracking area update request message can be understood as a TAU request, and after the core network receives the TAU request, it initiates a NAS security mode command (Security Mode Command, SMC) process.
  • SMC Security Mode Command
  • the LTE sends a NAS security mode command message to the UE.
  • the UE responds to the NAS security mode command message and feeds back the NAS security command complete message (Security Command Complete Msg) to the LTE, and then the LTE sends the NAS security command complete message to the core network.
  • NAS security command complete message Security Command Complete Msg
  • the NAS security command completion message is not transmitted to the core network in time due to reasons such as base station abnormality or uplink burst interference.
  • the dotted line pointing to the LTE from the UE indicates that the NAS security command completion message sent by the UE is not transmitted to the core network in time.
  • the dotted line labeled S111a indicates that the NAS security mode command message sent by the UE in response to S111 was not sent to the LTE in time.
  • the core network does not receive the NAS security command completion message or the NAS security command rejection message (Security command Reject Msg) within the specified time (such as 1 second after sending the NAS security mode command message), the NAS security command will be retransmitted.
  • Mode command messages namely S112-S113.
  • the core network sends a NAS security mode command message to the LTE.
  • the LTE sends a NAS security mode command message to the UE.
  • the dotted line labeled S113a indicates that the NAS security mode command message sent by the UE in response to S113 was not sent to the LTE in time.
  • the core network After the core network sends the NAS security mode command message for the second time, it still does not receive the NAS security command completion message or the NAS security command rejection message in time, and retransmits the NAS security mode command message, namely S114-S115.
  • the core network sends a NAS security mode command message to the LTE.
  • the LTE sends a NAS security mode command message to the UE.
  • the dotted line labeled S115a indicates that the NAS security mode command message sent by the UE in response to S115 was not sent to the LTE in time.
  • the core network After the core network sends the NAS security mode command message for the third time, it still does not receive the NAS security command completion message or the NAS security command rejection message in time, and retransmits the NAS security mode command message, namely S116-S117.
  • the core network sends a NAS security mode command message to the LTE.
  • the LTE sends a NAS security mode command message to the UE.
  • the dotted line labeled S117a indicates that the NAS security mode command message sent by the UE in response to S117 was not sent to the LTE in time.
  • the core network After the core network sends the NAS security mode command message for the fourth time, it still does not receive the NAS security command completion message or the NAS security command rejection message in time.
  • the core network sends a tracking area update rejection message and the number #15 of the reason for rejection to the UE.
  • the UE After being rejected for reason #15, the UE will execute S119.
  • the UE adds the tracking area code (Tracking Area Code, TAC) to the rejection list (Forbidden List).
  • TAC Track Area Code
  • the tracking area includes multiple (for example, 100) cells.
  • the cells under the tracking area in the rejection list need to be disabled for 24 hours. Therefore, in the case that the UE still resides in the tracking area (ie the mobile phone has not moved a long distance), because the cell is disabled, S120 is executed.
  • the UE cannot access the network, and the called party fails.
  • the process of calling the UE by the peer mobile phone ends, that is, the call fails in this call.
  • the peer mobile phone receives a prompt tone of "the user you dialed is in a call".
  • the UE camps on the NR.
  • S121 includes at least the steps of: the UE sends a message back to the NR to the NR, and the NR sends a message back to the NR to the core network.
  • the opposite mobile phone may initiate a call again if the call is not successful.
  • S122 is executed.
  • the NR sends a redirection message including the LTE frequency point number to the UE.
  • the UE executes S124.
  • the PSBC waits until the AAA (Authentication, Authorization, and Accounting) times out, resulting in connection failure.
  • AAA Authentication, Authorization, and Accounting
  • the embodiment of the present application provides a call processing method, the purpose of which is to improve the success rate of the EPS FB call. It can be understood that a successful call means that no matter whether the UE is the calling party or the called party, the call process can be successfully established with the peer UE.
  • an electronic device can access a 5G standalone (Standalone, SA) network or an LTE network.
  • SA Standalone
  • LTE Long Term Evolution
  • FIG. 3 is a flow chart of a call processing method disclosed in the embodiment of the present application, including the following steps:
  • the core network After the core network receives an MT message or a Mobile Originated Call (MO Call) message, the core network, NR, LTE, and UE start the EPS FB through message interaction.
  • MO Call Mobile Originated Call
  • S201 is a generalization of S101-S105, that is, the specific implementation manner of S201 may refer to S101-S105, which will not be repeated here.
  • the NR sends a redirection message to the UE.
  • the UE camps on the cell of the LTE network according to K.
  • the UE After finding a suitable cell in the LTE network by using the LTE frequency point number, the UE camps on the cell.
  • the UE sends a tracking area update request message to the LTE.
  • the tracking area indicated by the tracking area update request message is the tracking area to which the cell of the LTE network where the UE camps belongs.
  • the UE starts identifying the abnormal signaling flow.
  • the UE may create at least one process or thread for identifying the abnormal signaling flow, so as to start identifying the abnormal signaling flow.
  • the abnormal signaling flow is multiple retransmissions of the same signaling. For example, if it is monitored that before the UE receives the TAUACCEPT message, the UE has received the NAS security mode command message, and has also sent the NAS security command completion message, but then receives the NAS security mode command message, it is determined that the abnormal signaling flow is identified .
  • the abnormal signaling flow is that the signaling is not sent successfully.
  • Packet Data Convergence Protocol Packet Data Convergence Protocol
  • RLC Radio Link Control
  • the LTE sends a tracking area update request message to the core network.
  • S207 is performed by a mobility management entity (Mobile Management Entity, MME) that is a device of the core network.
  • MME Mobile Management Entity
  • S207 refers to S110-S117 (including S111a, S113a, S115a, and S117a). That is, in this embodiment, the core network has never received the security command completion message or the security command rejection message fed back by the UE, and S208 is executed.
  • the core network sends a tracking area update rejection message and the number #15 of the reason for rejection to the UE.
  • the UE confirms that the abnormal signaling flow is identified.
  • the triggering condition of S209 is receiving the tracking area update rejection message and/or the number #15 of the rejection reason.
  • S205 starts identifying the abnormal signaling flow
  • S207 includes S110-S117, that is, the retransmitted NAS security mode command message has been received multiple times, so it is confirmed that the abnormal signaling flow has been identified.
  • the UE adds the tracking area code (Tracking Area Code, TAC) to the rejection list (Forbidden List).
  • TAC Track Area Code
  • the tracking area indicated by the TAC is the tracking area to which the cell of the LTE network where the UE camps belongs.
  • the UE adds the cell where it resides to a blacklist.
  • the UE received the tracking area update rejection message and the number #15 of the reason for the rejection, and in conjunction with S111, the NAS security command completion message was not transmitted to the core network in time due to reasons such as base station abnormality or uplink burst interference, Therefore, it can be determined that the signal of the cell where the UE is currently camping is not good, so in order to improve the possibility of successfully establishing a subsequent call, the cell where the UE is currently camping is added to the blacklist.
  • the UE judges whether an available cell at frequency K or other frequency points is found.
  • An available cell may be understood as a cell that can normally connect to the LTE network. It can be understood that the tac of the tracking area to which the available cell belongs is not in the rejection list.
  • the UE first searches for available cells at the K frequency point, and searches for available cells at other frequency points if no available cell is found at the K frequency point.
  • Other frequency points may be available frequency points pre-configured in the UE.
  • the cell information broadcast by the base station carries an identifier, which is used to indicate that the cell is an acceptable cell, a suitable cell, or a forbidden cell, etc., and the UE can determine an available cell through the identifier and the signal strength of the cell.
  • the UE initiates a TAU on an available cell and establishes a call.
  • S108 For specific steps of initiating a TAU, refer to S108. Also, refer to S110-S111 (may also include S112-S117), the process of establishing a call includes the SMC process, and the process of establishing a call may also include other steps, which can be referred to the communication protocol, and will not be repeated here.
  • the process of initiating the establishment of a call may not necessarily successfully establish the call, so the process of initiating the establishment of a call can be understood as an attempt to establish a call.
  • the UE After the call is established successfully, the UE records the available cell as the preferred cell.
  • S214 The purpose of S214 is to make the UE preferentially select the cell that has successfully established the call in the subsequent call, so as to improve the success rate of the call.
  • the UE re-registers.
  • Registration refers to registration with the network
  • re-registration refers to re-registration with the network.
  • the UE issues a re-registration instruction in response to the judgment result of S212 being no, and triggers re-registration.
  • the re-registration instruction is an instruction issued by the UE after performing the following operations:
  • the UE re-registers in the 5G network or 4G network.
  • the user does not need to perform operations 1 and 2, but the UE sends a re-registration instruction in response to the judgment result of S212 being No, so as to realize automatic re-registration of the UE.
  • the re-registration instruction may be issued by a module in the software framework running in the UE, or may be issued by a chip, which is not limited here.
  • the re-registration is triggered by the UE, and is jointly completed by the UE, the LTE, and the core network.
  • the specific process can be found in the communication protocol, and will not be repeated here.
  • the UE and the network perform the following steps respectively:
  • the UE clears the deny list.
  • the core network clears the record that the TAU is rejected.
  • the core network sends the tracking area update rejection message and the number #15 of the reason for rejection, according to the communication protocol, it will also record the state that the TAU is rejected. In this step, the core network clears this record.
  • the UE in the idle state preferentially camps on the 5G network. Therefore, the UE triggers S218 according to the communication protocol.
  • the UE, the NR, and the core network implement the UE camping on the NR through message interaction.
  • the core network After the core network receives the MT or MO message again, the EPS FB is triggered, and then S219 is executed.
  • the core network the core network, NR, LTE and UE start the EPS FB through message interaction.
  • the NR sends a redirection message including the frequency point identifier K of the LTE network to the UE.
  • the UE selects a K frequency point or an available cell of other frequency points to camp on.
  • the last call may or may not be successful. If the last call is successful, record the preferred cell in S214. Therefore, one implementation of this step is to preferentially camp in the preferred cell And avoid staying in a blacklist cell.
  • the UE directly camps on the preferred cell, so as to obtain a higher possibility of successfully establishing a call with a lower cell search cost.
  • the preferred cell fails to camp, and the UE searches for an available cell again, and avoids selecting a cell in the blacklist during the search process, that is, a blacklisted cell. In conjunction with the description of S211, avoiding camping in a blacklist cell can improve the possibility of successfully establishing a call.
  • this step is to select a cell outside the blacklist cell to camp on, so as to increase the possibility of successfully establishing the call.
  • the rejection list is cleared and the record of TUA being rejected is cleared, so even if the UE has not moved out of the tracking area that was written in the rejection list, and the last call failure has not exceeded 24 hours, the UE in this step It is also more likely to camp on an available cell.
  • the process described in this embodiment simulates the scenario of manually triggering re-registration, so it can be compatible with existing protocols, that is, under the framework of existing protocols, the possibility of successfully establishing a call is improved.
  • FIG 4 is a flow chart of another call processing method disclosed in the embodiment of the present application. Compared with Figure 2, the following improvements have been made:
  • S124b A process of selecting a cell belonging to the rejection list, initiating a TAU and establishing a call.
  • the cells belonging to the rejection list are: the cells whose tac of the tracking area they belong to is in the rejection list.
  • the method described in this embodiment uses this possibility to maximize the possibility of successfully establishing the call flow for the next call.
  • S120b A process of selecting a cell belonging to the rejection list, initiating a TAU and establishing a call.
  • the process shown in FIG. 5 can improve the possibility of successfully establishing the call process of the current call, thereby further improving the success rate of the call.
  • Fig. 6 is a call processing method combined with the flow shown in Fig. 3 and Fig. 4, compared with the flow shown in Fig. 3, the difference is:
  • S213a A process of selecting a cell belonging to the rejection list, initiating a TAU and establishing a call.
  • the 5G network is used as an SA as an example for description above, and the above embodiments of the present application are also applicable to non-standalone networking (None-Standalone, NSA).
  • the call processing method described in the above embodiments can be applied to mobile phones, tablet computers, desktops, laptops, notebook computers, ultra-mobile personal computers (Ultra-mobile Personal Computer, UMPC), handheld computers, netbooks, personal digital Assistants (Personal Digital Assistant, PDA), wearable electronic devices, smart watches and other electronic devices that can support calls, the aforementioned UE also belongs to the electronic device.
  • Ultra-mobile Personal Computer Ultra-mobile Personal Computer, UMPC
  • handheld computers netbooks
  • personal digital Assistants Personal Digital Assistants
  • PDA Personal Digital Assistant
  • wearable electronic devices smart watches and other electronic devices that can support calls
  • the aforementioned UE also belongs to the electronic device.
  • FIG. 7 is a composition example of an electronic device provided in an embodiment of the present application.
  • the electronic device 300 may include a processor 310, an external memory interface 320, an internal memory 321, a display screen 330, a camera 340, an antenna 1, an antenna 2, a mobile communication module 350, and a wireless communication module 360, etc.
  • the structure shown in this embodiment does not constitute a specific limitation on the electronic device.
  • the electronic device may include more or fewer components than shown, or combine some components, or separate some components, or arrange different components.
  • the illustrated components can be realized in hardware, software or a combination of software and hardware.
  • the processor 310 may include one or more processing units, for example: the processor 310 may include an application processor (application processor, AP), a modem processor, a graphics processing unit (graphics processing unit, GPU), an image signal processor (image signal processor, ISP), controller, video codec, digital signal processor (digital signal processor, DSP), baseband processor, and/or neural network processor (neural-network processing unit, NPU), etc. Wherein, different processing units may be independent devices, or may be integrated in one or more processors.
  • the interface connection relationship among the modules shown in this embodiment is only a schematic illustration, and does not constitute a structural limitation of the electronic device 300 .
  • the electronic device 300 may also adopt different interface connection manners in the foregoing embodiments, or a combination of multiple interface connection manners.
  • the external memory interface 320 can be used to connect an external memory card, such as a Micro SD card, to expand the storage capacity of the electronic device.
  • the external memory card communicates with the processor 310 through the external memory interface 320 to implement a data storage function. Such as saving music, video and other files in the external memory card.
  • the internal memory 321 may be used to store computer-executable program codes including instructions.
  • the processor 310 executes various functional applications and data processing of the electronic device 300 by executing instructions stored in the internal memory 321 .
  • the internal memory 321 may include an area for storing programs and an area for storing data.
  • the stored program area can store an operating system, at least one application program required by a function (such as a sound playing function, an image playing function, etc.) and the like.
  • the storage data area can store data (such as audio data, phone book, etc.) created during the use of the electronic device.
  • the internal memory 321 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, flash memory device, universal flash storage (universal flash storage, UFS) and the like.
  • the processor 310 executes various functional applications and data processing of the electronic device by executing instructions stored in the internal memory 321 and/or instructions stored in the memory provided in the processor.
  • the electronic device realizes the display function through the GPU, the display screen 330 , and the application processor.
  • the GPU is a microprocessor for image processing, and is connected to the display screen 330 and the application processor. GPUs are used to perform mathematical and geometric calculations for graphics rendering.
  • Processor 310 may include one or more GPUs that execute program instructions to generate or alter display information.
  • the display screen 330 is used to display images, videos and the like.
  • the display screen 330 includes a display panel.
  • the display panel can be a liquid crystal display (LCD), an organic light-emitting diode (OLED), an active matrix organic light emitting diode or an active matrix organic light emitting diode (active-matrix organic light emitting diode, AMOLED), flexible light-emitting diode (flex light-emitting diode, FLED), Miniled, MicroLed, Micro-oled, quantum dot light emitting diodes (quantum dot light emitting diodes, QLED), etc.
  • the electronic device may include 1 or N display screens 330, where N is a positive integer greater than 1.
  • the electronic device can realize the shooting function through ISP, camera 340 , video codec, GPU, display screen 330 and application processor.
  • the ISP is used for processing data fed back by the camera 340 .
  • the light is transmitted to the photosensitive element of the camera through the lens, and the optical signal is converted into an electrical signal, and the photosensitive element of the camera transmits the electrical signal to the ISP for processing, and converts it into an image visible to the naked eye.
  • ISP can also perform algorithm optimization on image noise, brightness, and skin color. ISP can also optimize the exposure, color temperature and other parameters of the shooting scene.
  • the ISP may be located in the camera 340 .
  • the wireless communication function of the electronic device can be realized by the antenna 1, the antenna 2, the mobile communication module 350, the wireless communication module 360, the modem processor and the baseband processor.
  • Antenna 1 and Antenna 2 are used to transmit and receive electromagnetic wave signals.
  • Each antenna in an electronic device can be used to cover a single or multiple communication frequency bands. Different antennas can also be multiplexed to improve the utilization of the antennas.
  • Antenna 1 can be multiplexed as a diversity antenna of a wireless local area network.
  • the antenna may be used in conjunction with a tuning switch.
  • the mobile communication module 350 can provide wireless communication solutions including 2G/3G/4G/5G applied to electronic devices.
  • the mobile communication module 350 may include at least one filter, switch, power amplifier, low noise amplifier (low noise amplifier, LNA) and the like.
  • the mobile communication module 350 can receive electromagnetic waves through the antenna 1, filter and amplify the received electromagnetic waves, and send them to the modem processor for demodulation.
  • the mobile communication module 350 can also amplify the signal modulated by the modem processor, convert it into electromagnetic wave and radiate it through the antenna 1 .
  • at least part of the functional modules of the mobile communication module 350 may be set in the processor 310 .
  • at least part of the functional modules of the mobile communication module 350 and at least part of the modules of the processor 310 may be set in the same device.
  • the electronic device initiates or receives a call request through the mobile communication module 350 and the antenna 1 .
  • the wireless communication module 360 can provide wireless local area networks (wireless local area networks, WLAN) (such as wireless fidelity (Wi-Fi) network), bluetooth (bluetooth, BT), global navigation satellite system, etc. (global navigation satellite system, GNSS), frequency modulation (frequency modulation, FM), near field communication technology (near field communication, NFC), infrared technology (infrared, IR) and other wireless communication solutions.
  • the wireless communication module 360 may be one or more devices integrating at least one communication processing module.
  • the wireless communication module 360 receives electromagnetic waves via the antenna 3 , frequency-modulates and filters the electromagnetic wave signals, and sends the processed signals to the processor 310 .
  • the wireless communication module 360 can also receive the signal to be sent from the processor 310 , frequency-modulate it, amplify it, and convert it into electromagnetic waves through the antenna 2 for radiation.
  • the electronic device 300 may implement audio functions through an audio module 370 , a speaker 370A, a receiver 370B, a microphone 370C, an earphone interface 370D, and an application processor. Such as music playback, recording, etc.
  • the audio module 370 is used to convert digital audio information into analog audio signal output, and is also used to convert analog audio input into digital audio signal.
  • the audio module 370 may also be used to encode and decode audio signals.
  • the audio module 370 can be set in the processor 310 , or some functional modules of the audio module 370 can be set in the processor 310 .
  • Speaker 370A also called “horn” is used to convert audio electrical signals into sound signals.
  • Electronic device 300 can listen to music through speaker 370A, or listen to hands-free calls.
  • Receiver 370B also called “earpiece” is used to convert audio electrical signals into audio signals.
  • the receiver 370B can be placed close to the human ear to receive the voice.
  • the microphone 370C also called “microphone” or “microphone” is used to convert sound signals into electrical signals.
  • the user can put his mouth close to the microphone 370C to make a sound, and input the sound signal to the microphone 370C.
  • the electronic device 300 may be provided with at least one microphone 370C. In some other embodiments, the electronic device 300 may be provided with two microphones 370C, which may also implement a noise reduction function in addition to collecting sound signals. In some other embodiments, the electronic device 300 can also be provided with three, four or more microphones 370C, so as to collect sound signals, reduce noise, identify sound sources, and realize directional recording functions, etc.
  • the earphone interface 370D is used to connect wired earphones.
  • the earphone interface 370D may be a USB interface, or a 3.5mm open mobile terminal platform (OMTP) standard interface, or a cellular telecommunications industry association of the USA (CTIA) standard interface.
  • OMTP open mobile terminal platform
  • CTIA cellular telecommunications industry association of the USA
  • an operating system runs on top of the above components.
  • An application program can be installed and run on the operating system.
  • FIG. 8 is a block diagram of a software structure of an electronic device according to an embodiment of the present application.
  • the layered architecture divides the software into several layers, and each layer has a clear role and division of labor. Layers communicate through software interfaces.
  • the Android system is divided into four layers, which are respectively the application program layer, the application program framework layer, the Android runtime (Android runtime) and the system library, and the kernel layer from top to bottom.
  • the application layer can consist of a series of application packages. As shown in FIG. 8, the application package may include applications such as camera, gallery, calendar, call, map, navigation, WLAN, Bluetooth, music, video, and short message.
  • applications such as camera, gallery, calendar, call, map, navigation, WLAN, Bluetooth, music, video, and short message.
  • the application framework layer provides an application programming interface (application programming interface, API) and a programming framework for applications in the application layer.
  • the application framework layer includes some predefined functions. As shown in Figure 8, the application framework layer can include window manager, content provider, phone manager, resource manager, notification manager, view system, etc.
  • a window manager is used to manage window programs.
  • the window manager can get the size of the display screen, determine whether there is a status bar, lock the screen, capture the screen, etc.
  • Content providers are used to store and retrieve data and make it accessible to applications.
  • Said data may include video, images, audio, calls made and received, browsing history and bookmarks, phonebook, etc.
  • the phone manager is used to provide communication functions of electronic devices. For example, the management of call status (including connected, hung up, etc.).
  • the resource manager provides various resources for the application, such as localized strings, icons, pictures, layout files, video files, and so on.
  • the notification manager enables the application to display notification information in the status bar, which can be used to convey notification-type messages, and can automatically disappear after a short stay without user interaction.
  • the notification manager is used to notify the download completion, message reminder, etc.
  • the notification manager can also be a notification that appears on the top status bar of the system in the form of a chart or scroll bar text, such as a notification of an application running in the background, or a notification that appears on the screen in the form of a dialog window.
  • prompting text information in the status bar issuing a prompt sound, vibrating the electronic device, and flashing the indicator light, etc.
  • the view system includes visual controls, such as controls for displaying text, controls for displaying pictures, and so on.
  • the view system can be used to build applications.
  • a display interface can consist of one or more views.
  • a display interface including a text message notification icon may include a view for displaying text and a view for displaying pictures.
  • the Android Runtime includes core library and virtual machine.
  • the Android runtime is responsible for the scheduling and management of the Android system.
  • the cold start of the application will run in the Android runtime, and the Android runtime obtains the optimized file status parameters of the application, and then the Android runtime can judge whether the optimized file is outdated due to system upgrades through the optimized file status parameters , and return the judgment result to the application control module.
  • the core library consists of two parts: one part is the function function that the java language needs to call, and the other part is the core library of Android.
  • the application layer and the application framework layer run in virtual machines.
  • the virtual machine executes the java files of the application program layer and the application program framework layer as binary files.
  • the virtual machine is used to perform functions such as object life cycle management, stack management, thread management, security and exception management, and garbage collection.
  • a system library can include multiple function modules. For example: surface manager (surface manager), media library (Media Libraries), 3D graphics processing library (eg: OpenGL ES), 2D graphics engine (eg: SGL), etc.
  • the surface manager is used to manage the display subsystem and provides the fusion of 2D and 3D layers for multiple applications.
  • the media library supports playback and recording of various commonly used audio and video formats, as well as still image files, etc.
  • the media library can support a variety of audio and video encoding formats, such as: MPEG2, H.262, MP3, AAC, AMR, JPG, PNG, etc.
  • the 3D graphics processing library is used to realize 3D graphics drawing, image rendering, compositing and layer processing, etc.
  • the 2D graphics engine is a drawing engine for 2D drawing.
  • the kernel layer is the layer between hardware and software.
  • the kernel layer includes at least display driver, camera driver, audio driver, sensor driver, etc.

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Abstract

本申请提供一种通话处理方法及装置，应用于电子设备，被叫或发起主叫的电子设备在从5G网络重定向至LTE网络后，驻留在LTE网络的第一小区，第一小区属于跟踪区域，所述方法包括：在跟踪区域更新失败后，响应于识别到异常信令流，搜索不属于跟踪区域的可用小区，在可用小区发起跟踪区域更新，以尝试建立通话。识别到异常信令流说明有可能因为信令没有发送而导致跟踪区域更新失败，所以在不属于跟踪区域的可用小区尝试建立通话，能够提高从5G网络重定向至LTE网络后成功建立通话的可能性。

Description

通话处理方法及装置
本申请要求于2021年12月22日提交中国专利局、申请号为202111583519.3、发明名称为“通话处理方法及装置”的中国专利申请以及于2022年03月23日提交中国专利局、申请号为202210294836.1、发明名称为“通话处理方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种通话处理方法及装置。
背景技术
5G新无线(5G New Radio，5G NR)技术，简称NR，是逐渐大规模商用的通信技术。但目前的5G网络并不支持语音通话，因此手机驻留到NR网络后，如果手机发起主叫或者被叫，手机将从驻留的5G网络切换至长期演进(Long Term Evolution，LTE)网络(又称为4G网络)，在LTE网络执行通话业务，这种操作通常被称为紧急步骤回落(Emergency procedures Fallback，EPS FB)。
发明内容
本申请提供了一种通话处理方法及装置，目的在于提高EPS FB通话建立的成功率。
为了实现上述目的，本申请提供了以下技术方案：
本申请的第一方面提供一种通话处理方法，应用于电子设备，被叫或发起主叫的电子设备在从5G网络重定向至LTE网络后，驻留在LTE网络的第一小区，第一小区属于跟踪区域，所述方法包括：在跟踪区域更新失败后，响应于识别到异常信令流，搜索不属于跟踪区域的可用小区，在可用小区发起跟踪区域更新，以尝试建立通话。识别到异常信令流说明有可能因为信令没有发送而导致跟踪区域更新失败，所以在不属于跟踪区域的可用小区尝试建立通话，能够提高从5G网络重定向至LTE网络后成功建立通话的可能性。
在一些实现方式中，识别到异常信令流包括：识别到相同的信令多次重传；或者，识别到信令未成功发送。相同的信令多次重传以及信令未成功发送是导致跟踪区域更新失败的常见原因，所以异常信令流的上述两种具体情况，能够进一步提高从5G网络重定向至LTE网络后成功建立通话的可能性。
在一些实现方式中，在响应于识别到异常信令流，搜索不属于跟踪区域的可用小区之前，还包括：将跟踪区域编码加入拒绝列表。
在一些实现方式中，还包括：响应于没有搜索到所述可用小区，触发在5G网络重新注册。重新注册能够实现拒绝列表的清空，从而提高下一次从5G网络重定向至LTE网络后成功建立通话的可能性。
在一些实现方式中，在触发在5G网络重新注册之前，还包括：在属于跟踪区域的小区发起跟踪区域更新，以尝试建立通话，以尽可能建立通话，从而提高成功建立通话的可能性。
在一些实现方式中，在可用小区发起跟踪区域更新之后，还包括：响应于通话建立成功，将可用小区记录为优选小区，以为后续驻留小区的选择提供便利和依据，因为优先小 区是通话建立成功的小区，所以能够进一步提高后续通话成功建立的可能性。
在一些实现方式中，在可用小区发起跟踪区域更新之后，还包括：响应于跟踪区域更新失败，将第一小区加入黑名单，以为后续驻留小区的选择提供便利和依据，能够进一步提高后续通话成功建立的可能性。
在一些实现方式中，在所述清空所述拒绝列表之后，还包括：再次被叫或再次发起主叫且从5G网络重定向至LTE网络后，驻留在LTE的第二小区，所述第二小区不在黑名单中且为优选小区，在第二小区建立通话，以能够进一步提高通话成功建立的可能性。
本申请的第二方面提供一种通话处理方法，应用于电子设备，被叫或发起主叫的电子设备在从5G网络重定向至LTE网络后，被叫或主叫失败，方法包括：确定可选择的小区所属的跟踪区域均在拒绝列表中，从属于拒绝列表中的跟踪区域的小区中，选择第一小区，在选择的第一小区发起跟踪区域更新，以尝试建立通话。虽然第一小区所属的跟踪区域属于拒绝列表，但仍有在第一小区成功建立通话的可能性，所以，尝试在属于拒绝列表的跟踪区域的第一小区建立通话，能够尽可能提高成功建立通话的可能性。
在一些实现方式中，在所述从属于拒绝列表中的跟踪区域的小区中，选择第一小区之前，还包括：在跟踪区域更新失败后，将跟踪区域编码加入拒绝列表。
本申请的第三方面提一种电子设备，包括：存储器以及至少一个处理器；所述存储器用于存储应用程序，所述至少一个处理器用于执行所述应用程序，以实现本申请的第一方面或第二方面所述的通话处理方法。
本申请的第四方面提供了一种计算机存储介质，用于存储计算机程序，计算机程序被执行时，具体用于实现第一方面或第二方面所述的通话处理方法。
本申请的第五方面提供了一种计算机程序产品，当计算机程序产品在计算机上运行时，使得计算机执行第一方面或第二方面所述的通话处理方法。
附图说明
图1a为5G网络和4G网络覆盖同一区域的示例图；
图1b为手机在4G网络覆盖下通话的示例图；
图2为从5G网络回落4G网络后通话没有成功建立的流程图；
图3为本申请实施例公开的一种通话处理方法的流程图；
图4为本申请实施例公开的又一种通话处理方法的流程图；
图5为本申请实施例公开的又一种通话处理方法的流程图；
图6为本申请实施例公开的又一种通话处理方法的流程图；
图7为本申请实施例公开的电子设备的硬件结构示例图；
图8为本申请实施例公开的电子设备的软件框架的示例图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述。以下实施例中所使用的术语只是为了描述特定实施例的目的，而并非旨在作为对本申请的限制。如在本申请的说明书和所附权利要求书中所使用的那样，单数表达形式“一个”、“一种”、“所述”、“上述”、“该”和“这一”旨在也包括例如“一个或多个”这种表达形式，除非其上下文中明确地有相反指示。还应当理解，在本申请实施例中，“一个或多 个”是指一个、两个或两个以上；“和/或”，描述关联对象的关联关系，表示可以存在三种关系；例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B的情况，其中A、B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。
在本说明书中描述的参考“一个实施例”或“一些实施例”等意味着在本申请的一个或多个实施例中包括结合该实施例描述的特定特征、结构或特点。由此，在本说明书中的不同之处出现的语句“在一个实施例中”、“在一些实施例中”、“在其他一些实施例中”、“在另外一些实施例中”等不是必然都参考相同的实施例，而是意味着“一个或多个但不是所有的实施例”，除非是以其他方式另外特别强调。术语“包括”、“包含”、“具有”及它们的变形都意味着“包括但不限于”，除非是以其他方式另外特别强调。
本申请实施例涉及的多个，是指大于或等于两个。需要说明的是，在本申请实施例的描述中，“第一”、“第二”等词汇，仅用于区分描述的目的，而不能理解为指示或暗示相对重要性，也不能理解为指示或暗示顺序。
图1a中，用户没有拨打电话或接听电话，在此情况下，手机通常驻留在5G网络的小区(cell)中(当然也可以驻留在LTE网络的小区中)，图1a中，手机与5G基站连接，表示手机通常驻留在5G网络的小区中。如果用户要拨打电话或接听电话，如图1b所示，需要将手机切换至LTE网络，即手机只能在LTE网络中拨打电话或接听电话。图1b中，手机与4G基站连接，表示手机驻留在4G网络的小区中。
但发明人在研究的过程中发现，EPS FB过程中，在终端从5G网络重定向到4G网络后，通话的成功率有待提高。
以图1b为例，手机主叫情况下，用户拨出电话后，通话建立不成功，用户可能听到提示音“您拨打的用户正在通话中”，假设用户没有携带手机进行较大距离的移动且下一通呼叫与上一通呼叫不超过一定时长(如24小时)，再下一通呼出后通话还是建立不成功，并听到语音提示“您拨打的用户暂时无法接通”。
手机被叫的情况也类似，对端手机与本端手机在本通电话以及下一通电话均不能成功建立通话流程，对方手机发出“您拨打的用户正在通话中”或者“您拨打的用户暂时无法接通”的提示音。
下面将结合图2，对终端从5G网络重定向到4G网络，通话的成功率不高的原因进行分析：
图2中以手机被叫为例，包括以下步骤：
S101、核心网在接收到移动台被呼(Mobile Terminated Call，MT call)消息后，向NR转发MT call消息。
在本申请的实施例以及附图中，NR是指5G网络的无线接入装置。
S102、NR响应于MT call消息，向用户设备(User Equipment，UE)发送邀请(invite)消息。
invite消息通常携带有消息体，消息体包含主叫方的媒体信息，消息体还可以包含其它会话信息，例如资源列表。
S103、UE接收到invite消息后，分别向NR发送应答消息100 Trying和会话_进程(SESSION_PROGRESS)消息(183)。
S104、NR将应答消息100 Trying和SESSION_PROGRESS消息(183)发送到核心网。
S105、核心网响应于应答消息100 Trying和SESSION_PROGRESS消息(183)，向NR发送触发EPS FB的消息。
在某些实现方式中，核心网和NR之间进行消息交互来确认开启EPS FB，S105为消息交互的触发步骤，消息交互的具体实现方式，可参见通信协议，这里不再赘述。S106、NR向UE发送重定向消息。
重定向消息用于将UE重定向到LTE网络，重定向消息包括LTE网络的频点标识，本实施例中频点标识以频点号为例。
S107、UE使用LTE频点号搜到合适的LTE小区。
合适的LTE小区的定义以及具体的搜索方式可参见通信协议，这里不再赘述。
S108、UE在驻留到合适的LTE小区后，向LTE发送跟踪区域更新请求消息(Tracking Area Update Request Mag)。
在本申请的实施例以及附图中，LTE是指4G网络的无线接入装置。
也就是说，UE在驻留到合适的LTE小区后，发起跟踪区域更新(Tracking Area Update，TAU)流程。
S109、LTE向核心网发送跟踪区域更新请求消息。
S110、核心网响应于跟踪区域更新请求消息，向LTE发送非接入层(non-access stratum，NAS)安全模式命令消息(Security Mode Command Msg)。
可以理解的是，跟踪区域更新请求消息可以理解为TAU请求，核心网收到TAU请求后，发起NAS安全模式命令(Security Mode Command，SMC)流程。
S111、LTE向UE发送NAS安全模式命令消息。
在某些实现方式(正常情况)中，UE响应于NAS安全模式命令消息，向LTE反馈NAS安全命令完成消息(Security Command Complete Msg)，再由LTE向核心网发送NAS安全命令完成消息。
在另一些实现方式中，由于基站异常或者上行突发干扰等原因，导致NAS安全命令完成消息没有及时传输至核心网。图2中，以UE指向LTE的虚线表示UE发出的NAS安全命令完成消息没有及时传输至核心网。标号为S111a的虚线表示UE响应于S111而发送的NAS安全模式命令消息没有及时发送至LTE。
在此情况下，核心网如果在规定时间内(如发出NAS安全模式命令消息后1秒)没有接收到NAS安全命令完成消息或者NAS安全命令拒绝消息(Security command Reject Msg)，则重传NAS安全模式命令消息，即S112-S113。
S112、核心网向LTE发送NAS安全模式命令消息。
S113、LTE向UE发送NAS安全模式命令消息。
图2中，标号为S113a的虚线表示UE响应于S113而发送的NAS安全模式命令消息没有及时发送至LTE。核心网在第二次发送NAS安全模式命令消息后，还是没有及时接收到NAS安全命令完成消息或者NAS安全命令拒绝消息，重传NAS安全模式命令消息，即S114-S115。
S114、核心网向LTE发送NAS安全模式命令消息。
S115、LTE向UE发送NAS安全模式命令消息。
图2中，标号为S115a的虚线表示UE响应于S115而发送的NAS安全模式命令消息没有及时发送至LTE。核心网在第三次发送NAS安全模式命令消息后，还是没有及时接收到NAS安全命令完成消息或者NAS安全命令拒绝消息，重传NAS安全模式命令消息，即S116-S117。
S116、核心网向LTE发送NAS安全模式命令消息。
S117、LTE向UE发送NAS安全模式命令消息。
图2中，标号为S117a的虚线表示UE响应于S117而发送的NAS安全模式命令消息没有及时发送至LTE。核心网在第四次发送NAS安全模式命令消息后，还是没有及时接收到NAS安全命令完成消息或者NAS安全命令拒绝消息。
也就是说，图2假设核心网重传了三次(共四次)NAS安全模式命令消息，但均未及时收到NAS安全命令完成消息或者NAS安全命令拒绝消息，则执行以下步骤：
S118、核心网向UE发送跟踪区域更新拒绝消息以及拒绝原因的编号#15。
按照通信协议规定，因为#15原因被拒绝后，UE将执行S119。
S119、UE将跟踪区域编码(Tracking Area Code，TAC)加入拒绝列表(Forbidden List)。
跟踪区域中包括多个(如100个)小区，按照通信协议，拒绝列表中的跟踪区域下的小区，均需要禁用24小时。因此，在UE仍然驻留在该跟踪区域(即手机没有移动较远的距离)的情况下，因为小区被禁用，所以执行S120。
S120、UE无法接入网络，被叫失败。
至此，对端手机呼叫UE的流程结束，即本通被叫失败。在某些实现方式中，在本通呼叫失败后，对端手机接收到“您拨打的用户正在通话中”的提示音。
被叫流程结束后，因为UE不再有通话业务，所以，执行S121。
S121、UE驻留NR。
S121至少包括步骤：UE向NR发送回到NR的消息以及NR向核心网发送回到NR的消息。
可以理解的是，对端手机在没有呼叫成功的情况下，可能再次发起呼叫，在此情况下，在核心网再次接收到呼叫UE的MT call消息后，执行S122。
S122、核心网、LTE以及UE通过消息的交互，启动EPS FB。
可以理解的是，S122的具体步骤包括S101-S105。
S123、NR向UE发送包括LTE频点号的重定向消息。
假设UE所处的跟踪区域不变，即还处于S107驻留的小区所属的跟踪区域(即手机没有移动较远的距离)且距离上次被叫失败未超出24小时，则UE执行S124。
S124、UE使用LTE频点号搜索到的小区所属的跟踪区域的tac均在拒绝列表中，找不到合适的小区，被叫失败。
S125、PSBC等到AAA(鉴别(Authentication)授权(Authorization)计费(Accounting))超时导致接通失败。
从图2可以看出，EPS FB后，由于核心网没有及时收到UE反馈的NAS安全命令完成消息，按照通信协议，禁用UE驻留的小区所属的跟踪区域，而在UE没有移动出该跟踪 区域，且距离上次呼叫失败未超出24小时的情况下，因为该跟踪区域被禁用，所以无论本通电话还是下一通电话，均无可用小区，而导致呼叫失败。
为了解决上述问题，本申请实施例提供一种通话处理方法，目的在于提高EPS FB通话的成功率。可以理解的是，通话成功是指，无论UE是主叫还是被叫，均能都与对端UE成功建立通话流程。
本申请的以下实施例应用的场景为：电子设备可接入5G的独立组网(Standalone，SA)网络或LTE网络。在电子设备驻留在5G的SA网络的情况下，被对端电子设备呼叫或向对端电子设备发起呼叫。
图3为本申请实施例公开的一种通话处理方法的流程，包括以下步骤：
S201、在核心网接收到MT消息或移动台始呼(Mobile Originated Call，MO Call)消息后，核心网、NR、LTE以及UE通过消息交互，启动EPS FB。
可以理解的是，S201为对S101-S105的概括，即S201的具体实现方式可参见S101-S105，这里不再赘述。
S202、NR向UE发送重定向消息。
本步骤中，将重定向消息包括的LTE网络的频点标识记为K。
S203、UE依据K驻留在LTE网络的小区。
可以理解的是，UE使用LTE频点号搜到LTE网络中的合适的小区后，驻留在该小区中。
S204、UE向LTE发送跟踪区域更新请求消息。
可以理解的是，跟踪区域更新请求消息指示的跟踪区域为UE驻留的LTE网络的小区所属的跟踪区域。
S205、UE启动对异常信令流的识别。
可以理解的是，UE可以创建至少一个用于识别异常信令流的进程或线程等，以启动对异常信令流的识别。
在某些实现方式中，异常信令流为相同信令多次重传。例如，监控到UE在收到TAUACCEPT消息之前，UE已收到NAS安全模式命令消息，也已发出NAS安全命令完成消息，但之后又接收到NAS安全模式命令消息，则确定识别到异常信令流。
在另一些实现方式中，异常信令流为信令未成功发送。通过统计分组数据汇聚协议(Packet Data Convergence Protocol，PDCP)、和/或无线链路控制(Radio Link Control，RLC)层协议数据包的发送情况，推测NAS安全命令完成(Security command complete)消息是否未成功发送出去，如未成功发送出去，则确定识别到异常信令流。
在识别到异常信令流的情况下，执行S210-S216以及S221。
S206、LTE向核心网发送跟踪区域更新请求消息。
可以理解的是，S205和S206的执行顺序不做限定。
S207、核心网、LTE以及UE执行SMC流程。
在某些实现方式中，S207由作为核心网的设备的移动性管理实体(Mobile Management Entity，MME)执行。
可以理解的是，S207的具体实现方式可以参见S110-S117(包括S111a、S113a、S115a以及S117a)。即本实施例中，核心网一直未收到UE反馈的安全命令完成消息或者安全命令拒绝消息，则执行S208。
S208、核心网向UE发送跟踪区域更新拒绝消息以及拒绝原因的编号#15。
S209、UE确认识别到异常信令流。
可以理解的是，S209的触发条件为接收到跟踪区域更新拒绝消息和/或拒绝原因的编号#15。
因为S205启动对异常信令流的识别，并且，S207包括S110-S117，即多次接收到了重传的NAS安全模式命令消息，所以，确认识别到异常信令流。
S210、UE将跟踪区域编码(Tracking Area Code，TAC)加入拒绝列表(Forbidden List)。
可以理解的是，TAC指示的跟踪区域为UE驻留的LTE网络的小区所属的跟踪区域。
S211、UE将驻留的小区加入黑名单。
可以理解的是，因为UE接收到跟踪区域更新拒绝消息以及拒绝原因的编号#15，并且结合S111所述，基站异常或者上行突发干扰等原因导致NAS安全命令完成消息没有及时传输至核心网，所以可以确定当前驻留小区的信号不佳，所以为了提高后续成功建立通话的可能性，将UE当前驻留的小区加入黑名单。
S212、UE判断是否搜索到频点K或其它频点的可用小区。
可用小区可以理解为可以正常连接LTE网络的小区。可以理解的是，可用小区所属的跟踪区域的tac不在拒绝列表中。
在某些实现方式中，UE先在K频点下搜索可用小区，在K频点下没有搜索到可用小区的情况下，在其它频点下搜索可用小区。其它频点可以为UE中预先配置的可用频点。
在某些实现方式中，基站广播的小区信息中携带标识，标识用于指示小区为可接受的小区、合适的小区或者禁止的小区等，UE可以通过标识以及小区的信号强度，确定可用小区。
如果S212的判断结果为是，执行S213-S214，如果S212的判断结果为否，执行S215以及S215的后续流程。
S213、UE在可用小区上发起TAU及建立通话的流程。
发起TAU的具体步骤可参见S108。并且，参见S110-S111(还可能包括S112-S117)，建立通话的流程包括SMC流程，建立通话的流程有可能还包括其它步骤，可以参见通信协议，这里不再赘述。
因为小区可用，即小区所属的跟踪区域的tac不在拒绝列表中，所以，有可能成功建立通话。可以理解的是，发起建立通话的流程，不一定能够成功建立通话，所以，发起建立通话的流程可以理解为尝试建立通话。
S214、UE在通话建立成功后，将可用小区记录为优选小区。
S214的目的在于，使得UE在后续通话中优先选择曾经成功建立通话的小区，以提高通话的成功率。
可以理解的是，如果没有搜索到可用的小区，则不能建立通话，本通呼叫(无论主叫还是被叫)失败。
但本实施例所述的流程，即使本通呼叫失败，还要执行S215-S217，目的在于，提高下一通呼叫成功建立通话的可能性。
S215、UE重新注册。
注册是指向网络注册，重新注册是指重新向网络注册。
本步骤中，UE响应于S212的判断结果为否，发出重新注册的指令，触发重新注册。
按照通信协议，重新注册的指令为UE被执行以下操作后发出的指令：
1、开启飞行模式再关闭飞行模式。
即从5G网络或4G网络切换至飞行模式，关闭飞行模式后，UE在5G网络或4G网络中重新注册。
2、取出SIM卡后，再插入SIM卡。
本步骤中，用户无需进行操作1和2，而是由UE响应于S212的判断结果为否发出重新注册的指令，以实现UE自动重新注册。
在某些实现方式中，重新注册的指令，可以由UE中运行的软件框架中的模块发出，也可以由芯片发出，这里不做限定。
可以理解的是，按照通信协议，重新注册由UE触发，由UE与LTE以及核心网共同完成，具体流程可以参见通信协议，这里不再赘述。
按照协议，在UE重新注册后，UE以及网络分别执行以下步骤：
S216、UE清空拒绝列表。
S217、核心网清除TAU被拒绝的记录。
可以理解的是，核心网在发送跟踪区域更新拒绝消息以及拒绝原因的编号#15后，依据通信协议，还要记录TAU被拒绝这一状态。本步骤中，核心网清除这一记录。
按照通信协议，在UE支持5G网络和LTE网络的情况下，在某些实现方式中，空闲态的UE优先驻留在5G网络，因此，UE依据通信协议触发S218。
S218、UE、NR以及核心网通过消息的交互，实现UE驻留NR。
UE、NR以及核心网之间的信息交互流程，可以参见通信协议，这里不再赘述。
在核心网再次接收到MT或MO消息后，触发EPS FB，则执行S219。
S219、核心网、NR、LTE以及UE通过消息交互，启动EPS FB。
S220、NR向UE下发包括LTE网络的频点标识K的重定向消息。
S221、UE选择K频点或其它频点的可用小区进行驻留。
可以理解的是，基于上述步骤，上一通通话有可能成功也有可能不成功，在上一通通话成功的情况下，在S214中记录优选小区，因此本步骤的一种实现方式为优先驻留优选小区且避免驻留黑名单小区。
在某些实现方式中，UE直接驻留在优选小区，从而以较低的小区搜索代价获得较高的成功建立通话的可能性。在另一些实现方式中，有可能优选小区驻留失败，则UE重新搜索可用的小区，在搜索过程中，避免选到黑名单中的小区，即黑名单小区。结合S211所述，避免驻留黑名单小区，能够提高成功建立通话的可能性。
在上一通通话不成功的情况下，不存在优选小区，所以本步骤的另一种实现方式为在黑名单小区之外选择小区进行驻留，以提高成功建立通话的可能性。
因为重新注册后，拒绝列表被清空以及TUA被拒绝的记录被清除，所以即使UE没有移动出曾经被写入拒绝列表中的跟踪区域，且距离上次呼叫失败未超出24小时，UE在该步骤也能够较大可能驻留到可用的小区。
S222、UE与核心网之间的通话成功建立。
从图3所示的流程可以看出，在搜索到的小区所属的跟踪区域的tac在拒绝列表，而导致通话不能成功建立的情况下，UE继续搜索可用的小区并发起TAU以及建立通话的流程，以提高EPS FB通话的成功率。
进一步的，即使本通呼叫没有成功建立，因为UE触发了重新注册，所以，能够提高下一通呼叫成功建立通话的可能性。
并且，本实施例所述的流程，模拟了手动触发重新注册的场景，因此，能够与现有的协议兼容，即在现有协议的框架下，提高成功建立通话的可能性。
图4为本申请实施例公开的又一种通话处理方法的流程，与图2相比，进行了如下改进：
将S124替换为步骤以下内容：
S124a、确定使用LTE频点号搜索到的小区所属的跟踪区域的tac均在拒绝列表中。
S124b、选择一个属于拒绝列表的小区，发起TAU及建立通话的流程。
可以理解的是，属于拒绝列表的小区为：所属的跟踪区域的tac在拒绝列表中的小区。
实际中，因为属于拒绝列表的小区有被核心网允许使用的可能性，所以，本实施例所述的方法，利用这一可能性，尽量提高下一通呼叫成功建立通话流程的可能性。
可以理解的是，在属于拒绝列表的小区，发起TAU及建立通话的流程失败的情况下，仍然执行S125。
可以理解的是，在本通呼叫中，也可以尝试选择一个属于拒绝列表的小区，发起TAU及建立通话的流程，即如图5所示，将S120替换为S120a以及S120b。
S120a、确定使用LTE频点号搜索到的小区所属的跟踪区域的tac均在拒绝列表中。
S120b、选择一个属于拒绝列表的小区，发起TAU及建立通话的流程。
可以理解的是，有可能在S120b之后，成功建立通话流程，在此情况下，后续步骤不再执行，也有可能在S120b之后，仍然不能建立通话流程，在此情况下，执行后续步骤，并在S124b之后，仍然不能建立通话流程的情况下，执行S125。
图5所示的流程，能够提高本通呼叫成功建立通话流程的可能性，从而进一步提高通话的成功率。
图6为结合图3以及图4所示流程的通话处理方法，与图3所示流程相比区别在于：
在S212的判断结果为否的情况下，在执行S215之前，执行以下步骤：
S213a、选择一个属于拒绝列表的小区，发起TAU及建立通话的流程。
S213a之后有可能可以成功建立通话流程，但因为拒绝列表中还存在跟踪区域编码，所以有可能下一通通话不能成功建立，所以为了提高下一通通话成功建立的可能性，在 S213a之后，无论S213a是否成功建立通话流程，均执行S215。
需要说明的是，以上实施例中，相同的步骤可以相互参见，而不再赘述。
图6所示的流程，在没有搜索到可用小区的情况下，从拒接列表中选择一个小区尝试发起TAU以及建立通话的流程，以最大限度地尝试在本通呼叫成功建立通话流程，进一步提高EPSFB后成功建立通话流程的可能性。
可以理解的是，以上以5G网络为SA为例进行说明，本申请的以上实施例，也适用于非独立组网(None-Standalone，NSA)。
以上实施例所述的通话处理方法，均可以适用于手机，平板电脑，桌面型、膝上型、笔记本电脑，超级移动个人计算机(Ultra-mobile Personal Computer，UMPC)，手持计算机，上网本，个人数字助理(Personal Digital Assistant，PDA)，可穿戴电子设备，智能手表等可支持呼叫的电子设备，前述提出的UE也属于该电子设备。
图7为本申请实施例提供的一种电子设备的组成示例。以手机为例，电子设备300可以包括处理器310，外部存储器接口320，内部存储器321，显示屏330，摄像头340，天线1，天线2，移动通信模块350，以及无线通信模块360等。
可以理解的是，本实施例示意的结构并不构成对该电子设备的具体限定。在另一些实施例中，该电子设备可以包括比图示更多或更少的部件，或者组合某些部件，或者拆分某些部件，或者不同的部件布置。图示的部件可以以硬件，软件或软件和硬件的组合实现。
处理器310可以包括一个或多个处理单元，例如：处理器310可以包括应用处理器(application processor，AP)，调制解调处理器，图形处理器(graphics processing unit，GPU)，图像信号处理器(image signal processor，ISP)，控制器，视频编解码器，数字信号处理器(digital signal processor，DSP)，基带处理器，和/或神经网络处理器(neural-network processing unit，NPU)等。其中，不同的处理单元可以是独立的器件，也可以集成在一个或多个处理器中。
可以理解的是，本实施例示意的各模块间的接口连接关系，只是示意性说明，并不构成对电子设备300的结构限定。在本申请另一些实施例中，电子设备300也可以采用上述实施例中不同的接口连接方式，或多种接口连接方式的组合。
外部存储器接口320可以用于连接外部存储卡，例如Micro SD卡，实现扩展电子设备的存储能力。外部存储卡通过外部存储器接口320与处理器310通信，实现数据存储功能。例如将音乐，视频等文件保存在外部存储卡中。
内部存储器321可以用于存储计算机可执行程序代码，可执行程序代码包括指令。处理器310通过运行存储在内部存储器321的指令，从而执行电子设备300的各种功能应用以及数据处理。内部存储器321可以包括存储程序区和存储数据区。其中，存储程序区可存储操作系统，至少一个功能所需的应用程序(比如声音播放功能，图像播放功能等)等。存储数据区可存储电子设备使用过程中所创建的数据(比如音频数据，电话本等)等。此外，内部存储器321可以包括高速随机存取存储器，还可以包括非易失性存储器，例如至少一个磁盘存储器件，闪存器件，通用闪存存储器(universal flash storage，UFS)等。处理器310通过运行存储在内部存储器321的指令，和/或存储在设置于处理器中的存储器的指令，执行 电子设备的各种功能应用以及数据处理。
电子设备通过GPU，显示屏330，以及应用处理器等实现显示功能。GPU为图像处理的微处理器，连接显示屏330和应用处理器。GPU用于执行数学和几何计算，用于图形渲染。处理器310可包括一个或多个GPU，其执行程序指令以生成或改变显示信息。
显示屏330用于显示图像，视频等。显示屏330包括显示面板。显示面板可以采用液晶显示屏(liquid crystal display，LCD)，有机发光二极管(organic light-emitting diode，OLED)，有源矩阵有机发光二极体或主动矩阵有机发光二极体(active-matrix organic light emitting diode的，AMOLED)，柔性发光二极管(flex light-emitting diode，FLED)，Miniled，MicroLed，Micro-oled，量子点发光二极管(quantum dot light emitting diodes，QLED)等。在一些实施例中，电子设备可以包括1个或N个显示屏330，N为大于1的正整数。
电子设备可以通过ISP，摄像头340，视频编解码器，GPU，显示屏330以及应用处理器等实现拍摄功能。
ISP用于处理摄像头340反馈的数据。例如，拍照时，打开快门，光线通过镜头被传递到摄像头感光元件上，光信号转换为电信号，摄像头感光元件将电信号传递给ISP处理，转化为肉眼可见的图像。ISP还可以对图像的噪点，亮度，肤色进行算法优化。ISP还可以对拍摄场景的曝光，色温等参数优化。在一些实施例中，ISP可以设置在摄像头340中。
电子设备的无线通信功能可以通过天线1，天线2，移动通信模块350，无线通信模块360，调制解调处理器以及基带处理器等实现。
天线1和天线2用于发射和接收电磁波信号。电子设备中的每个天线可用于覆盖单个或多个通信频带。不同的天线还可以复用，以提高天线的利用率。例如：可以将天线1复用为无线局域网的分集天线。在另外一些实施例中，天线可以和调谐开关结合使用。
移动通信模块350可以提供应用在电子设备上的包括2G/3G/4G/5G等无线通信的解决方案。移动通信模块350可以包括至少一个滤波器，开关，功率放大器，低噪声放大器(low noise amplifier，LNA)等。移动通信模块350可以由天线1接收电磁波，并对接收的电磁波进行滤波，放大等处理，传送至调制解调处理器进行解调。移动通信模块350还可以对经调制解调处理器调制后的信号放大，经天线1转为电磁波辐射出去。在一些实施例中，移动通信模块350的至少部分功能模块可以被设置于处理器310中。在一些实施例中，移动通信模块350的至少部分功能模块可以与处理器310的至少部分模块被设置在同一个器件中。
一些实施例中，电子设备通过移动通信模块350和天线1发起或接收的呼叫请求。
无线通信模块360可以提供应用在电子设备上的包括无线局域网(wireless local area networks，WLAN)(如无线保真(wireless fidelity，Wi-Fi)网络)，蓝牙(bluetooth，BT)，全球导航卫星系统(global navigation satellite system，GNSS)，调频(frequency modulation，FM)，近距离无线通信技术(near field communication，NFC)，红外技术(infrared，IR)等无线通信的解决方案。无线通信模块360可以是集成至少一个通信处理模块的一个或多个器件。无线通信模块360经由天线3接收电磁波，将电磁波信号调频以及滤波处理，将处理后的信号发送到处理器310。无线通信模块360还可以从处理器310接收待发送的信号，对其进行调频，放大，经天线2转为电磁波辐射出去。
电子设备300可以通过音频模块370，扬声器370A，受话器370B，麦克风370C，耳机接口370D，以及应用处理器等实现音频功能。例如音乐播放，录音等。
音频模块370用于将数字音频信息转换成模拟音频信号输出，也用于将模拟音频输入转换为数字音频信号。音频模块370还可以用于对音频信号编码和解码。在一些实施例中，音频模块370可以设置于处理器310中，或将音频模块370的部分功能模块设置于处理器310中。
扬声器370A，也称“喇叭”，用于将音频电信号转换为声音信号。电子设备300可以通过扬声器370A收听音乐，或收听免提通话。
受话器370B，也称“听筒”，用于将音频电信号转换成声音信号。当电子设备300接听电话或语音信息时，可以通过将受话器370B靠近人耳接听语音。
麦克风370C，也称“话筒”，“传声器”，用于将声音信号转换为电信号。当拨打电话或发送语音信息时，用户可以通过人嘴靠近麦克风370C发声，将声音信号输入到麦克风370C。电子设备300可以设置至少一个麦克风370C。在另一些实施例中，电子设备300可以设置两个麦克风370C，除了采集声音信号，还可以实现降噪功能。在另一些实施例中，电子设备300还可以设置三个，四个或更多麦克风370C，实现采集声音信号，降噪，还可以识别声音来源，实现定向录音功能等。
耳机接口370D用于连接有线耳机。耳机接口370D可以是USB接口，也可以是3.5mm的开放移动电子设备平台(open mobile terminal platform，OMTP)标准接口，美国蜂窝电信工业协会(cellular telecommunications industry association of the USA，CTIA)标准接口。
另外，在上述部件之上，运行有操作系统。例如iOS操作系统，Android操作系统，Windows操作系统等。在操作系统上可以安装运行应用程序。
图8是本申请实施例的电子设备的软件结构框图。
分层架构将软件分成若干个层，每一层都有清晰的角色和分工。层与层之间通过软件接口通信。在一些实施例中，将Android系统分为四层，从上至下分别为应用程序层，应用程序框架层，安卓运行时(Android runtime)和系统库，以及内核层。
应用程序层可以包括一系列应用程序包。如图8所示，应用程序包可以包括相机，图库，日历，通话，地图，导航，WLAN，蓝牙，音乐，视频，短信息等应用程序。
应用程序框架层为应用程序层的应用程序提供应用编程接口(application programming interface，API)和编程框架。应用程序框架层包括一些预先定义的函数。如图8所示，应用程序框架层可以包括窗口管理器，内容提供器，电话管理器，资源管理器，通知管理器，视图系统等。
窗口管理器用于管理窗口程序。窗口管理器可以获取显示屏大小，判断是否有状态栏，锁定屏幕，截取屏幕等。
内容提供器用来存放和获取数据，并使这些数据可以被应用程序访问。所述数据可以包括视频，图像，音频，拨打和接听的电话，浏览历史和书签，电话簿等。
电话管理器用于提供电子设备的通信功能。例如通话状态的管理(包括接通，挂断等)。
资源管理器为应用程序提供各种资源，比如本地化字符串，图标，图片，布局文件，视频文件等等。
通知管理器使应用程序可以在状态栏中显示通知信息，可以用于传达告知类型的消息，可以短暂停留后自动消失，无需用户交互。比如通知管理器被用于告知下载完成，消息提醒等。通知管理器还可以是以图表或者滚动条文本形式出现在系统顶部状态栏的通知，例如后台运行的应用程序的通知，还可以是以对话窗口形式出现在屏幕上的通知。例如在状态栏提示文本信息，发出提示音，电子设备振动，指示灯闪烁等。
视图系统包括可视控件，例如显示文字的控件，显示图片的控件等。视图系统可用于构建应用程序。显示界面可以由一个或多个视图组成的。例如，包括短信通知图标的显示界面，可以包括显示文字的视图以及显示图片的视图。
Android Runtime包括核心库和虚拟机。Android runtime负责安卓系统的调度和管理。在本申请一些实施例中，应用冷启动会在Android runtime中运行，Android runtime由此获取到应用的优化文件状态参数，进而Android runtime可以通过优化文件状态参数判断优化文件是否因系统升级而导致过时，并将判断结果返回给应用管控模块。
核心库包含两部分：一部分是java语言需要调用的功能函数，另一部分是安卓的核心库。
应用程序层和应用程序框架层运行在虚拟机中。虚拟机将应用程序层和应用程序框架层的java文件执行为二进制文件。虚拟机用于执行对象生命周期的管理，堆栈管理，线程管理，安全和异常的管理，以及垃圾回收等功能。
系统库可以包括多个功能模块。例如：表面管理器(surface manager)，媒体库(Media Libraries)，三维图形处理库(例如：OpenGL ES)，二维图形引擎(例如：SGL)等。
表面管理器用于对显示子系统进行管理，并且为多个应用程序提供了2D和3D图层的融合。
媒体库支持多种常用的音频，视频格式回放和录制，以及静态图像文件等。媒体库可以支持多种音视频编码格式，例如:MPEG2，H.262，MP3，AAC，AMR，JPG，PNG等。
三维图形处理库用于实现三维图形绘图，图像渲染、合成和图层处理等。
二维图形引擎是2D绘图的绘图引擎。
内核层是硬件和软件之间的层。内核层至少包含显示驱动，摄像头驱动，音频驱动，传感器驱动等。
需要说明的是，本申请实施例虽然以Android系统为例进行说明，但是其基本原理同样适用于基于iOS、Windows等操作系统的电子设备。

Claims (11)

  1. 一种通话处理方法，其特征在于，应用于电子设备，被叫或发起主叫的所述电子设备在从5G网络重定向至LTE网络后，驻留在所述LTE网络的第一小区，所述方法包括：
    在跟踪区域更新失败后，响应于识别到异常信令流，搜索不属于跟踪区域的可用小区，所述第一小区属于所述跟踪区域；
    在所述可用小区发起跟踪区域更新，以尝试建立通话。
  2. 根据权利要求1所述的方法，其特征在于，所述识别到异常信令流，包括：
    识别到相同的信令多次重传；或者，识别到信令未成功发送。
  3. 根据权利要求1或2所述的方法，其特征在于，在所述响应于识别到异常信令流，搜索不属于跟踪区域的可用小区之前，还包括：
    将跟踪区域编码加入拒绝列表。
  4. 根据权利要求1-3任一项所述的方法，其特征在于，还包括：
    响应于没有搜索到所述可用小区，触发在所述5G网络重新注册；
    在所述重新注册之后，清空拒绝列表。
  5. 根据权利要求4所述的方法，其特征在于，在所述触发在所述5G网络重新注册之前，还包括：
    在属于所述跟踪区域的小区发起跟踪区域更新，以尝试建立通话。
  6. 根据权利要求1-5任一项所述的方法，其特征在于，在所述可用小区发起跟踪区域更新之后，还包括：
    响应于通话建立成功，将所述可用小区记录为优选小区。
  7. 根据权利要求1-6任一项所述的方法，其特征在于，还包括：
    响应于所述跟踪区域更新失败，将所述第一小区加入黑名单。
  8. 根据权利要求4-7任一项所述的方法，其特征在于，在所述清空拒绝列表之后，还包括：
    再次被叫或再次发起主叫且从所述5G网络重定向至所述LTE网络后，驻留在所述LTE的第二小区，所述第二小区不在所述黑名单中且为所述优选小区；
    在所述第二小区建立通话。
  9. 一种通话处理方法，其特征在于，应用于电子设备，被叫或发起主叫的所述电子设备在从5G网络重定向至LTE网络后，被叫或主叫失败，所述方法包括：
    确定可选择的小区所属的跟踪区域均在拒绝列表中；
    从属于所述拒绝列表中的跟踪区域的小区中，选择第一小区；
    在所述第一小区发起跟踪区域更新，以尝试建立通话。
  10. 根据权利要求9所述的方法，其特征在于，在所述从属于所述拒绝列表中的跟踪区域的小区中，选择第一小区之前，还包括：
    在跟踪区域更新失败后，将跟踪区域编码加入拒绝列表。
  11. 一种电子设备，其特征在于，包括：
    存储器以及至少一个处理器；所述存储器用于存储应用程序，所述至少一个处理器用 于执行所述应用程序，以实现权利要求1-10任一项所述的通话处理方法。
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200374777A1 (en) * 2017-10-13 2020-11-26 Huawei Technologies Co., Ltd. Cell Selection Method and Terminal
CN112399511A (zh) * 2019-08-16 2021-02-23 苹果公司 5g nr语音呼叫eps回退增强
WO2021135819A1 (en) * 2019-12-30 2021-07-08 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Cell selection in tracking area
CN113271645A (zh) * 2021-06-16 2021-08-17 维沃移动通信有限公司 驻网方法和装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180070238A1 (en) * 2016-11-10 2018-03-08 Mediatek Singapore Pte. Ltd. Method And Apparatus For Avoiding Denial Of Services In Mobile Communications
CN106454801B (zh) * 2016-12-14 2019-10-01 北京小米移动软件有限公司 网络切换方法及终端
CN106878975B (zh) * 2017-02-03 2019-10-18 Oppo广东移动通信有限公司 一种终端接入小区的方法及装置
CN110225464B (zh) * 2018-03-02 2020-12-15 华为技术有限公司 信息维护控制方法以及用户设备
CN109089297B (zh) * 2018-10-30 2021-01-08 维沃移动通信有限公司 一种网络搜索方法及终端
EP3905782A1 (en) * 2020-04-17 2021-11-03 Samsung Electronics Co., Ltd. Method and user equipment for managing failure in registration for accessing network slice
CN111866842B (zh) * 2020-08-26 2023-09-19 Oppo广东移动通信有限公司 跟踪区域的更新方法、装置、终端设备及存储介质
CN117221923A (zh) * 2021-05-31 2023-12-12 荣耀终端有限公司 用于提升sa网络下电话呼通率的通信系统及用户设备

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200374777A1 (en) * 2017-10-13 2020-11-26 Huawei Technologies Co., Ltd. Cell Selection Method and Terminal
CN112399511A (zh) * 2019-08-16 2021-02-23 苹果公司 5g nr语音呼叫eps回退增强
WO2021135819A1 (en) * 2019-12-30 2021-07-08 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Cell selection in tracking area
CN113271645A (zh) * 2021-06-16 2021-08-17 维沃移动通信有限公司 驻网方法和装置

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