WO2016045029A1 - 一种处理电路交换业务的方法及终端 - Google Patents

一种处理电路交换业务的方法及终端 Download PDF

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Publication number
WO2016045029A1
WO2016045029A1 PCT/CN2014/087381 CN2014087381W WO2016045029A1 WO 2016045029 A1 WO2016045029 A1 WO 2016045029A1 CN 2014087381 W CN2014087381 W CN 2014087381W WO 2016045029 A1 WO2016045029 A1 WO 2016045029A1
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WIPO (PCT)
Prior art keywords
terminal
service
circuit
network
timer
Prior art date
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PCT/CN2014/087381
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English (en)
French (fr)
Inventor
段小嫣
张博
金辉
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华为技术有限公司
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.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2014/087381 priority Critical patent/WO2016045029A1/zh
Priority to EP14902506.6A priority patent/EP3188541B1/en
Priority to CN201480037487.9A priority patent/CN105637931B/zh
Priority to US15/514,070 priority patent/US10306518B2/en
Publication of WO2016045029A1 publication Critical patent/WO2016045029A1/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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • 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
    • H04W36/00837—Determination of triggering parameters for hand-off
    • H04W36/008375—Determination of triggering parameters for hand-off based on historical data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/34—Reselection control
    • H04W36/36—Reselection control by user or terminal equipment
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method and a terminal for processing a circuit switched service.
  • the wireless mobile communication system has undergone an evolution from a 2G communication system, for example, GSM (Global System For Mobile Communication), 3G communication system, for example, UMTS (Universal Mobile Telecommunications System) to a 4G communication system.
  • the 4G communication system adopts the LTE (Long Term Evolution) access technology, and its access network is called E-UTRAN (English name: Evolved Universal Terrestrial Radio Access Network).
  • the LTE network is a packet switched (English name: Packet Switched, abbreviation: PS) network. It cannot provide circuit switching (English name: Circuit Switched, abbreviation: CS). It uses circuit-switched fallback (English full name: Circuit Switched Fallback, abbreviation: CSFB) As a solution for a circuit switched service in an LTE network.
  • the main idea of the CSFB is that the terminal resides in the E-UTRAN. When the terminal performs the circuit switching service, the terminal falls back from the LTE network to the 2G network or the 3G network, and the terminal completes the circuit switching service in the 2G network or the 3G network.
  • the specific process is as follows: :
  • the terminal When the terminal initiates circuit-switched services, the terminal must first fall back from the LTE network to the 2G network or the 3G network. After the terminal performs a circuit-switched service, it will return to the LTE network. If the terminal then initiates the circuit switching service again, the terminal needs to fall back from the LTE network to the 2G network or the 3G network. After the terminal performs the circuit switching service, it will return to the LTE network again. If the terminal needs to initiate circuit switching services multiple times within a preset time period, the terminal needs to perform multiple operations of dropping back from the LTE network to the 2G network or the 3G network, and performing multiple times to return from the 2G network or the 3G network to the LTE network. operating. Therefore, there is a defect that the power consumption of the terminal is large and the delay of the circuit switching service is large.
  • a terminal currently in an LTE network has a defect that the power consumption of the terminal is large and the delay of the circuit switched service is large.
  • the embodiments of the present invention provide a method and a terminal for processing a circuit switched service, which are used to solve the defects of the current large power consumption of the terminal and the large delay of the circuit switched service.
  • a method of processing a circuit switched service comprising:
  • the terminal After the terminal performs the circuit switching service in the first network supporting the circuit switched service, the terminal starts a timer;
  • the terminal When determining that the preset condition is met, the terminal returns to the second network that does not support the circuit switched service.
  • the terminal determines that, after the circuit switching service needs to be performed again before the timer expires, before the terminal performs the circuit switching service again, the terminal further includes :
  • the terminal records the number of delays once
  • the terminal After the terminal performs the circuit switching service again, and returns to the second network that does not support the circuit switching service, the terminal further includes:
  • the terminal records the number of delays.
  • the preset condition includes at least one of the following: the number of delays of the record reaches a preset delay number, The duration recorded by the timer reaches a preset delay duration;
  • the preset number of delays refers to the circuit switching allowed in the first network after the terminal performs the circuit switching service and before returning to the second network. The number of business.
  • the terminal before the terminal starts the timer, the terminal further includes:
  • the terminal determines that the service type of the circuit switched service is a supplementary service.
  • the terminal before the starting the timer, the terminal further includes:
  • the terminal determines at least one of the preset delay duration and the preset delay number.
  • the terminal starts a timer, including:
  • the terminal starts the timer according to the received message carrying a delay indication, where the delay indication is used to instruct the terminal to delay returning to the second network.
  • the delay indication includes one or any combination of a preset delay duration and a preset delay duration.
  • the terminal before the performing the circuit switching service again, the terminal further includes:
  • the terminal sends a circuit switched service request message to the mobile switching center server, where the circuit switched service request message carries a circuit switched fallback indication.
  • a method of processing a circuit switched service including:
  • the terminal After the terminal performs the circuit switching service in the first network supporting the circuit switched service, the terminal starts a timer;
  • the terminal After the terminal performs the circuit switching service again, after determining that the timer expires, the terminal returns to the second network that does not support the circuit switched service.
  • the terminal before the terminal starts the timer, the terminal further includes:
  • the terminal determines that the service type of the circuit switched service is a supplementary service.
  • the terminal before the starting the timer, the terminal further includes:
  • the terminal determines a preset delay duration.
  • the terminal starts a timer, including:
  • the terminal starts the timer according to the received message carrying a delay indication, where the delay indication is used to instruct the terminal to delay returning to the second network.
  • the delay indication includes a preset delay duration.
  • the terminal before the performing the circuit switching service again, the terminal further includes:
  • the terminal sends a circuit switched service request message to the mobile switching center server, where the circuit switched service request message carries a circuit switched fallback indication.
  • a terminal including:
  • a processing unit configured to execute the circuit switched service in a first network supporting circuit switched services
  • a starting unit configured to start a timer after the processing unit performs the circuit switching service in the first network
  • a determining unit configured to determine, after the starting unit starts the timer, whether the circuit switching service needs to be executed again before the timer expires
  • a triggering unit configured to determine, when the circuit switching service needs to be executed again before the timer expires, stopping the timer, triggering the processing unit to execute the circuit again in the first network Exchange business
  • a resetting unit configured to reset the timer after the processing unit performs the circuit switching service again
  • the method further includes: a recording unit, where the determining unit is configured to determine, after the determining unit needs to perform the circuit switching service again before the timer expires, Recording the number of delays before the processing unit performs the circuit switching service again;
  • the recording unit is configured to record a delay number of times before the returning unit returns to the second network that does not support the circuit-switched service after the processing unit performs the circuit-switched service again.
  • the preset condition includes at least one of the following: the number of delays of the record reaches a preset delay number, The duration recorded by the timer reaches a preset delay duration;
  • the preset number of delays refers to the circuit-switched service that the terminal is allowed to perform in the first network after performing the circuit-switched service once before returning to the second network. frequency.
  • the determining unit, before the starting unit starts the timer Also used for:
  • the second network does not support at least one of a packet switched voice service and a supplementary service
  • the service type of the circuit switched service is determined to be a supplementary service.
  • the determining unit is further configured to: before the starting unit starts the timer,
  • the starting unit is specifically configured to:
  • the timer is started according to the received message carrying a delay indication, where the delay indication is used to instruct the terminal to delay returning the Second network.
  • the delay indication includes one or any combination of a preset delay duration and a preset delay duration.
  • the method further includes: a sending unit, configured to send a circuit switched service request to the mobile switching center server The message, the circuit switched service request message carries a circuit switched fallback indication.
  • a terminal including:
  • a processing unit configured to perform the circuit switching service once in a first network supporting circuit switched services
  • a startup unit configured to start a timer after the processing unit performs the circuit switching service in the first network
  • a determining unit configured to determine, after the starting unit starts the timer, whether the circuit switching service needs to be performed again before the timer expires
  • a triggering unit configured to trigger the processing unit to perform the circuit-switched service again in the first network, when the determining unit determines that the circuit-switched service needs to be performed again before the timer expires;
  • a returning unit configured to return to the second network that does not support the circuit switched service when determining that the timer expires.
  • the determining unit is further configured to:
  • the second network does not support at least one of a packet switched voice service and a supplementary service
  • the service type of the circuit switched service is determined to be a supplementary service.
  • the determining unit is further configured to:
  • the starting unit is specifically configured to:
  • the processing unit After the processing unit performs the circuit switching service in the first network, starting the timer according to the received message carrying a delay indication, where the delay indication is used to instruct the terminal to delay returning the Second network.
  • the delay indication includes a preset delay duration.
  • the method further includes: a sending unit, where the sending unit is configured to perform mobile switching
  • the central server sends a circuit switched service request message, and the circuit switched service request message carries a circuit switched fallback indication.
  • a terminal including a transceiver, a communication bus, a memory, and a processor, wherein:
  • the communication bus is used for connection communication between the processor, the transceiver, and the memory;
  • the transceiver is configured to communicate with the terminal and the outside;
  • the memory is configured to store program code
  • the processor is configured to invoke program code stored in the memory, and perform the method as described in the first aspect, and the first to seventh possible implementation manners of the first aspect.
  • a terminal including a transceiver, a communication bus, a memory, and a processor, wherein:
  • the communication bus is used for connection communication between the processor, the transceiver, and the memory;
  • the transceiver is configured to communicate with the terminal and the outside;
  • the memory is configured to store program code
  • the processor is configured to invoke program code stored in the memory, and perform the method as described in the second aspect, and the first to fifth possible implementation manners of the second aspect.
  • the terminal after the terminal performs a circuit switching service in the first network, the terminal does not immediately return to the second network, but resides in the first network for a preset delay duration.
  • the terminal can perform at least one circuit switching service again within a preset delay duration.
  • the terminal returns to the second network when the preset condition is met. The process of returning from the first network to the second network after the terminal performs the circuit switching service is avoided; when the terminal performs the circuit switching service again, the terminal falls back from the second network to the first network. Therefore, the above technical solution can reduce the power consumption of the terminal and shorten the delay of the circuit switching service.
  • FIG. 1A is a flowchart of processing circuit switching services according to an embodiment of the present invention
  • FIG. 1B is a flowchart of processing circuit switching services according to an embodiment of the present invention.
  • FIG. 2 is an embodiment of processing a circuit switched circuit switching service according to an embodiment of the present invention
  • FIG. 3 is another embodiment of processing a circuit switched circuit switching service according to an embodiment of the present invention.
  • FIG. 4 is another embodiment of processing a circuit switched circuit switching service according to an embodiment of the present invention.
  • FIG. 5A is a schematic structural diagram of a terminal according to an embodiment of the present invention.
  • FIG. 5B is another schematic structural diagram of a terminal according to an embodiment of the present invention.
  • 6A is another schematic structural diagram of a terminal according to an embodiment of the present invention.
  • FIG. 6B is another schematic structural diagram of a terminal according to an embodiment of the present invention.
  • system and “network” are used interchangeably herein.
  • the term “and/or” in this context is merely an association describing the associated object, indicating that there may be three relationships, for example, A and / or B, which may indicate that A exists separately, and both A and B exist, respectively. B these three situations.
  • the letter “/” in this article generally indicates that the contextual object is an "or" relationship.
  • the terminal eg, mobile phone
  • the terminal includes an access layer (English full name: Access Stratum, abbreviation: AS) and a non-access stratum (English: Non-Access Stratum, abbreviation: NAS).
  • AS Access Stratum
  • NAS Non-Access Stratum
  • a process for processing a circuit switched service is as follows:
  • Step 100 After the terminal performs a circuit switching service in the first network supporting the circuit switching service, the terminal starts a timer.
  • Step 110 The terminal determines that when the circuit switching service needs to be executed again before the timer expires, the timer stops, and the circuit switching service is performed again in the first network.
  • Step 120 After the terminal performs the circuit switching service again, reset the timer.
  • Step 130 The terminal returns to the second network that does not support the circuit switched service when it is determined that the preset condition is met.
  • the first network may be an LTE network
  • the second network may be a 2G network or a 3G network.
  • the first network may also be a network of other standards. Details will not be repeated here.
  • the LTE network is a network supporting LTE
  • the 2G network is a network supporting 2G
  • the 3G network is a network supporting 3G.
  • the circuit switching service includes a voice call service and a supplementary service (English name: Supplementarty Service).
  • the terminal after determining that the circuit switching service needs to be performed again before the timer expires, the terminal further includes the following operations before the terminal performs the circuit switching service again:
  • the terminal records the number of delays.
  • the number of recording delays may be before the timer is stopped, or after the timer is stopped.
  • the terminal After the terminal performs the circuit switching service again and returns to the second network that does not support the circuit switched service, it also includes the following:
  • the terminal records the number of delays.
  • the number of recording delays may be before the reset timer or after the reset timer. That is to say, in the first embodiment, the terminal records the number of delays, but the number of delays of the terminal recording may be performed when the terminal determines that the circuit-switched service needs to be performed again, or the circuit-switched service is performed again at the terminal. After execution.
  • the above two methods can be flexibly applied, and will not be described in detail herein.
  • the preset condition includes at least one of the following: the number of delays of the record reaches the preset delay number, and the duration recorded by the timer reaches a preset delay duration, where the preset delay number refers to the terminal being executed.
  • the terminal determines that the type of the terminal conforms to the preset type.
  • the terminal determines that the second network does not support at least one of packet switched packet switched voice service and supplementary service; or
  • the terminal determines that the service type of the circuit switched service is a supplementary service.
  • the foregoing three determination results may be conditions for triggering the timer to be started. For example, when the terminal determines that the type of the terminal conforms to the preset type, the terminal starts the timer, and if it determines that the type of the terminal does not meet the preset type, the terminal Return to the first network. Similarly, if the terminal determines that the second network supports any one of the packet switched voice service and the supplementary service, the terminal returns to the first network.
  • the terminal before the timer is started, the terminal further includes:
  • the terminal determines at least one of a preset delay duration and a preset delay number.
  • the manner in which the terminal starts the timer is multiple, and may be as follows:
  • the terminal starts a timer according to the received message carrying the delay indication, where the delay indication is used to instruct the terminal to delay returning to the second network.
  • the terminal when the terminal starts the timer according to the received message carrying the delay indication, the terminal may be specifically as follows:
  • the terminal invokes the access layer to start a timer according to the message carrying the delay indication sent by the non-access stratum of the received terminal.
  • the message carrying the delay indication may be a newly constructed message or an existing message.
  • the delay indication includes one or any combination of a preset delay duration and a preset delay number, where the preset delay number refers to the terminal after performing a circuit switching service and before returning to the second network.
  • the preset delay number is 1, 2 or N, and N is a positive integer not equal to 1 (or 2).
  • the delay indication may be represented by an assignment on several specified bits in the message, such as an assignment on a certain bit of the message indicating a preset delay duration, and an assignment on another bit of the message indicating a preset delay number, the message An assignment on another bit different from the first two bits indicates a delayed return.
  • the assignments on the three bits may be carried in one message at the same time, or at least one of the assignments on the three bits may be carried in a message, for example, only the message indicating the delayed return is carried in the message. Assignment.
  • the order of the three bits is not limited. It should be understood that the above is merely a description of the delay indication and is not intended to be limiting.
  • a delay indication It is also possible to indicate at least one of a delay return, a preset delay duration, and a preset delay number by an assignment on one bit in the message.
  • the terminal may also set the preset delay duration and the preset delay number directly in the access layer, and the access layer of the terminal does not need to obtain the above two parameters from the non-access stratum, that is, the terminal starts the timer.
  • the access layer of the terminal does not need to obtain the above two parameters from the non-access stratum, that is, the terminal starts the timer.
  • the timer is started when the preset delay duration and/or the preset delay number are determined.
  • the preset delay number refers to the number of circuit-switched services performed by the terminal in the first network after performing the circuit-switched service and before returning to the second network.
  • the preset delay duration is T seconds.
  • the terminal determines that a circuit switching service is to be performed when the timer duration is s1 seconds (s1 ⁇ T), and the terminal stops the timer, and the terminal completes the time.
  • the terminal resets the timer (the timer is re-timed), and the terminal records the number of delays when the circuit switching service is to be executed or the circuit switching service is completed.
  • the terminal determines that the circuit switching service is to be performed when the timer duration is s2 seconds (s2 ⁇ T)
  • the terminal stops the timer and after the terminal completes the circuit switching service, the terminal resets the timer (the timer again) Re-timed), the terminal records the number of delays of 2 times when it is determined that the circuit-switched service is to be performed or the circuit-switched service is completed.
  • the preset delay number is N
  • the terminal returns to the LTE network after the number of recording delays reaches N times and the circuit switching service is completed.
  • the terminal resets the timer (timer re-clocking) after completing the mth (m ⁇ N) circuit-switched service. If this time, the terminal does not execute the circuit before the timer expires.
  • the terminal does not execute the circuit before the timer expires.
  • the terminal returns to the LTE network when the timer expires.
  • the terminal before the terminal performs the circuit switching service again, the terminal further includes the following operations:
  • the terminal sends a circuit switched service request message to the mobile switching center server, and the circuit switched service request message carries a circuit switched fallback indication.
  • Circuit Switch Fallback (English full name: CS Fallback, abbreviation: CSFB) indicates that it can be used for circuit switching to fall back to the caller (English name: CS Fallback Mobile Originating Call, abbreviation: CSMO) indication, or for the circuit exchange to fall back and call (English full name: CS Fallback Mobile Terminating Call, abbreviation: CSMT) indication.
  • CSFB Circuit Switch Fallback
  • CSMO Circuit Switch Fallback
  • CSMT Circuit Switch Fallback
  • the method may be as follows:
  • the terminal returns to the second network according to the connection release message.
  • connection release message may be a radio resource control (English name: Radio Resource Control, abbreviation: RRC) Connection Release message sent by the wireless network subsystem (English name: Radio Network Subsystem, abbreviation: RNS); or, the connection release message may be A Channel Release message sent for the base station subsystem (English name: Base Station Subsystem, abbreviation: BSS).
  • RRC Radio Resource Control
  • RNS Radio Network Subsystem
  • BSS Base Station Subsystem
  • the terminal If the RRC Connection Release message or the Channel Release message includes a redirection (English name: Redirect) to the related information of the cell in the second network (for example, the frequency information of the E-UTRAN cell, etc.), the terminal returns to the second network. , select and access the E-UTRAN cell.
  • a redirection English name: Redirect
  • the terminal reselects the E-UTRAN cell and accesses when returning to the second network.
  • a method for processing a circuit switched service is provided. After the terminal performs a circuit switching service in the first network, the terminal does not immediately return to the second network, but is in the first
  • the preset delay duration resides in the network.
  • the terminal can perform at least one circuit switching service again within a preset delay duration.
  • the terminal returns to the second network when the preset condition is met. The process of returning from the first network to the second network after the terminal performs the circuit switching service is avoided; when the terminal performs the circuit switching service again, the terminal falls back from the second network to the first network. Therefore, the above technical solution can reduce the power consumption of the terminal and shorten the delay of the circuit switching service.
  • Step 1000 The terminal starts a timer after performing a circuit switching service in the first network supporting the circuit switched service.
  • Step 1100 The terminal determines that the circuit switching service is performed again in the first network when the circuit switching service needs to be performed again before the timer expires.
  • Step 1200 After the terminal performs the circuit switching service again, it is determined that when the timer expires, the second network that does not support the circuit switched service is returned.
  • the first network may be an LTE network
  • the second network may be a 2G network or a 3G network.
  • the first network may also be a network of other standards, and no longer one is performed here.
  • LTE network is a network supporting LTE
  • 2G network is a network supporting 2G
  • 3G network is a network supporting 3G.
  • the circuit switching service includes a voice call service and a supplementary service.
  • the terminal determines that the type of the terminal conforms to the preset type.
  • the terminal determines that the second network does not support at least one of a packet switched voice service and a supplementary service; or
  • the terminal determines that the service type of the circuit switched service is a supplementary service.
  • the foregoing three determination results may be conditions for triggering the timer to be started. For example, when the terminal determines that the type of the terminal conforms to the preset type, the terminal starts the timer, and if it determines that the type of the terminal does not meet the preset type, the terminal Return to the first network. Similarly, if the terminal determines that the second network supports any one of the packet switched voice service and the supplementary service, the terminal returns to the first network.
  • the preset type may be a voice service-based type, and of course, other types may be used, and details are not described herein.
  • the terminal before the timer is started, the terminal further includes the following operations:
  • the terminal determines the preset delay duration.
  • the manner in which the terminal starts the timer is multiple, and optionally, the following manner may also be adopted:
  • the terminal starts a timer according to the received message carrying the delay indication, and the delay indication is used to instruct the terminal to delay returning to the second network.
  • the terminal invokes the access layer to start a timer according to the message carrying the delay indication sent by the non-access stratum of the received terminal.
  • the delay indication includes a preset delay duration.
  • the terminal before the terminal performs the circuit switching service again, the terminal further includes the following operations:
  • the terminal sends a circuit switched service request message to the mobile switching center server;
  • the circuit switched service request message carries a circuit switched fallback indication.
  • the circuit switched fallback indication may be a circuit switchback fallback caller indication, or may also be a circuit switched fallback callee indication.
  • the preset delay duration is T seconds.
  • the terminal determines that a circuit switched service is to be performed when the timer duration is s1 seconds (s1 ⁇ T), and the terminal performs the circuit switching service.
  • the terminal After the terminal completes the circuit switching service, if the timer duration of the timer is less than T seconds (that is, the timer does not time out), the terminal waits for the next circuit switching service, does not stop the timer; when the terminal is in the timer duration When it is determined that the circuit switching service is to be performed again for s2 seconds (s2 ⁇ T), the terminal performs the circuit switching service.
  • the terminal After the terminal completes the circuit switching service, if the timer duration of the timer is still less than T seconds (that is, the timer does not time out), the terminal waits for the next circuit switching service, does not stop the timer, and so on, until the timer The recorded time (ie, the time duration) reaches T seconds, ie the timer expires.
  • the terminal If the terminal is in the connected state when the timer expires, that is, the terminal is performing circuit-switched services or the terminal has a wireless connection with the RNS (or BSS), after the terminal completes the ongoing circuit-switched service (if the terminal is performing circuit-switched services) The wireless connection is released according to the connection release message sent by the RNS (or BSS), and the LTE network is returned. If the terminal is in an idle state when the timer expires, that is, there is no wireless connection between the terminal and the RNS (or between the BSSs), the terminal directly returns to the LTE network.
  • the terminal can perform one or more times of electricity before the timer expires.
  • the terminal needs to perform circuit switching services to perform circuit switching services.
  • FIG. 2 For a better understanding of the embodiments of the present invention, a specific application scenario is given below, and a process for processing the circuit switched service is further described in detail, as shown in FIG. 2:
  • Step 200 The terminal performs circuit switching service in the LTE network.
  • Step 210 After performing the current circuit switching service, the terminal determines whether it is a terminal that is mainly voice service, and if yes, step 220 is performed; otherwise, step 270 is performed;
  • Step 220 The terminal determines whether CSFB_WAIT_ENABLED is 1, and if so, step 230 is performed, otherwise, step 270 is performed;
  • Step 230 The non-access stratum in the terminal sends a message carrying the preset delay duration to the access layer of the terminal.
  • Step 240 The terminal invokes the preset delay duration carried by the access layer from the received message sent by the non-access stratum;
  • Step 250 The terminal starts a timer.
  • Step 260 The terminal continues to reside in the 3G network to perform the circuit switching service, and the duration of the timer recording reaches the preset delay duration, and the step 270 is performed;
  • step 260 as long as the duration recorded by the timer does not reach the preset delay duration, the terminal can perform the circuit switched service as long as the circuit switching service needs to be performed.
  • Step 270 The terminal returns to the LTE network.
  • the terminal after the terminal performs the circuit switching service on the 3G network, the terminal does not return to the LTE network, and continues to reside in the 3G network to perform circuit switching services, and each time the circuit switching service is executed before the timer expires, The LTE network is not immediately returned.
  • the duration recorded by the timer reaches the preset delay duration, the terminal returns to the LTE network. Therefore, the power consumption of the terminal is reduced and the delay of the circuit switched service is shortened.
  • Step 300 The terminal is dropped by the E-UTRAN (English name: Evolved Universal Terrestrial Radio Access Network) (LTE access network) to the 3G (or 2G) network to perform the circuit switching service, where the circuit switching service may be a supplementary service. Or, voice call service.
  • E-UTRAN English name: Evolved Universal Terrestrial Radio Access Network
  • 3G or 2G network
  • Step 310 After the terminal falls back to the 3G (or 2G) network, sends the first circuit switched service request message to the mobile switching center (English name: Mobile Switching Center, abbreviation: MSC) server;
  • MSC Mobile Switching Center
  • Step 320 The non-access stratum of the terminal sends a message carrying a delay indication to the access layer.
  • the delay indication is used to instruct the terminal to return to the LTE network.
  • the terminal instructs the non-access stratum to determine whether to send a message carrying the delay indication to the access layer according to the service type of the circuit-switched service currently performed by the terminal, for example, if it is determined that the circuit-switched service performed by the terminal is not related to the call.
  • the supplementary service such as the Unstructured Supplementary Service Data (USSD) service
  • the terminal invokes the non-access stratum to send a message carrying the delay indication to the access layer.
  • USB Unstructured Supplementary Service Data
  • the delay indication may be a preset identifier, or may be a preset delay duration, or may be a preset delay number, where the preset delay duration is used to indicate that the access layer of the terminal returns to the LTE after completing the circuit switching service.
  • the maximum length of time for waiting for the next circuit-switched service before the network For example, the preset delay duration is 30 seconds, which means that the terminal waits for 30 seconds after completing the circuit-switched service. If no new circuit-switched service is to be executed, the terminal returns. To the LTE network.
  • the message carrying the delay indication sent by the non-access stratum to the access layer may only carry the preset identifier used to indicate the delayed return. At this time, the access layer may set the preset delay duration.
  • the delay indication may further include a preset delay number, where the preset delay number refers to the number of circuit-switched services that the terminal is allowed to perform in the first network after performing the circuit-switched service and before returning to the LTE network.
  • the number of delay delays is 1, 2 or N, and N is a positive integer not equal to 1 (or 2).
  • Step 330 The terminal and the MSC Server exchange circuit exchange messages to perform the circuit switching service process.
  • Step 340 After performing the circuit switching service, the terminal receives the RRC Connection Release message (or the Channel Release message sent by the BSS) sent by the RNS, and the terminal starts a timer and waits for the next circuit switching service;
  • the terminal does not immediately follow the RRC Connection Release message. (or the Channel Release message sent by the BSS) selects and accesses the E-UTRAN cell (ie, quickly returns to E-UTRAN), but starts a timer to wait for the next circuit switched service.
  • the terminal does not immediately reselect the E-UTRAN cell and access (ie, returns to the E-UTRAN). Similarly, it is also a start timer to wait for the next circuit switched service.
  • Step 350 Before the timer expires, the terminal determines whether a circuit switched service request message (that is, a second circuit switched service request message sent by the non-access stratum of the terminal) sent by the non-access stratum is received, and if yes, the step is performed. 360; otherwise, step 370 is performed;
  • a circuit switched service request message that is, a second circuit switched service request message sent by the non-access stratum of the terminal
  • the timer can be counted from the initial value to a value greater than or equal to 0, or it can be a value from 0 to a value less than or equal to the preset delay duration. When the timer counts down from the initial value to 0, or from 0 to the preset delay duration, the timer is considered to be timed out.
  • the CSFB request may be carried in a CM Service Request message sent by the non-access stratum of the terminal, although the circuit switched service request message does not actually pass.
  • the CSFB process is initiated (ie, the terminal does not return to the LTE network, so there is no need to fall back to the 3G (or 2G) network by the LTE network), and the circuit switched service request message still carries the CSFB indication to indicate that the MSC Server completes the circuit switched service.
  • the connection release message carrying the CSFB indication is then sent to trigger the RNS (or BSS) to trigger the terminal to return to the E-UTRAN.
  • Step 360 the terminal continues to reside in the 3G (or 2G) network to perform the second circuit-switched service, and terminates the timer, step 380;
  • Step 370 The terminal returns to the LTE network.
  • step 370 if the RRC Connection Release message (or the Channel Release message sent by the BSS) sent by the RNS in step 340 includes related information of Redirect to E-UTRAN (ie, redirection information), the terminal selects according to the redirection information. E-UTRAN cell, and access to the selected E-UTRAN cell (ie, quickly return to E-UTRAN); if the RRC Connection Release message (or the Channel Release message sent by the BSS) sent by the RNS in step 340 does not include Redirect Related information of E-UTRAN, the terminal performs a cell reselection procedure, selects an E-UTRAN cell and accesses (ie, returns to E-UTRAN).
  • related information of Redirect to E-UTRAN ie, redirection information
  • the terminal selects according to the redirection information. E-UTRAN cell, and access to the selected E-UTRAN cell (ie, quickly return to E-UTRAN); if the RRC Connection Release message (or the Channel Release message sent by the BSS) sent
  • Step 380 After performing the circuit switching service, the terminal receives the RRC Connection Release message (or the Channel Release message sent by the BSS) sent by the RNS, and the terminal starts a timer and waits for the next circuit switching service.
  • the terminal After performing the circuit switching service, the terminal receives the RRC Connection Release message (or the Channel Release message sent by the BSS) sent by the RNS, and the terminal starts a timer and waits for the next circuit switching service.
  • the terminal After the terminal performs the second circuit switching service, if the preset delay number is 1, the terminal performs step 370. If the preset delay number is greater than 1, the terminal records the delay number and returns to step 340. When the timer expires or the recorded delay number is the preset delay number, the terminal performs step 370.
  • the terminal After the terminal performs the second circuit-switched service, the terminal records the delay number of 1 and starts the timer. Before the timer expires, the terminal receives the third circuit-switched service request. When the terminal stops counting the timer, the terminal performs the third circuit-switched service and records the number of delays to be 2, and the number of recorded delays reaches the preset delay number. Therefore, the terminal returns to the LTE network.
  • Step 400 The terminal is dropped by the E-UTRAN (LTE access network) to the 3G (or 2G) network for execution. This circuit switching business;
  • the circuit switching service may be a supplementary service or a voice call service.
  • Step 410 After the terminal falls back to the 3G (or 2G) network, sends the first circuit switched service request message to the MSC Server.
  • Step 420 The non-access stratum of the terminal sends a message carrying the delay indication to the access layer.
  • the delay indication is used to instruct the terminal to return to the LTE network.
  • the terminal may determine whether to call the non-access stratum to send a message carrying the delay indication to the access layer according to the service type of the circuit-switched service currently performed by the non-access stratum of the terminal, for example, if the terminal determines that the terminal performs
  • the circuit-switched service is a supplementary service (such as the USSD service) that is not related to the call.
  • the terminal invokes the non-access stratum to send a message carrying the delay indication to the access layer.
  • the delay indication may be a preset identifier or a preset delay duration, where the preset delay duration is used to indicate that the access layer of the terminal waits for a new circuit-switched service before returning to the LTE network after completing the circuit-switched service.
  • the maximum duration for example, the preset delay duration is 30 seconds, which means that the terminal waits for 30 seconds after completing the circuit-switched service. If no new circuit-switched service is to be executed, the terminal returns to the LTE network.
  • the message carrying the delay indication sent by the non-access stratum to the access layer may only carry the preset identifier used to indicate the delayed return. At this time, the access layer may set the preset delay duration.
  • Step 430 The terminal and the MSC Server exchange circuit exchange messages to perform the circuit switching service process.
  • Step 440 After performing the circuit switching service, the terminal receives the RRC Connection Release message (or the Channel Release message sent by the BSS) sent by the RNS, and the terminal starts a timer and waits for subsequent circuit switching services.
  • the terminal After performing the circuit switching service, the terminal receives the RRC Connection Release message (or the Channel Release message sent by the BSS) sent by the RNS, and the terminal starts a timer and waits for subsequent circuit switching services.
  • the terminal does not immediately follow the RRC Connection Release message. (or the Channel Release message sent by the BSS) selects and accesses the E-UTRAN cell (ie, quickly returns to E-UTRAN), but starts a timer to wait for subsequent circuit switched services.
  • the terminal does not immediately reselect the E-UTRAN cell and access (ie, returns to the E-UTRAN). Similarly, it is also a start timer for waiting for subsequent circuit switching services.
  • Step 450 Before the timer expires, the terminal determines whether to receive the subsequent one or more circuit switched service request messages sent from the non-access stratum, and if so, the terminal performs step 460; otherwise, the terminal performs step 470;
  • the timer can be counted from the initial value to a value greater than or equal to 0, or it can be a value from 0 to a value less than or equal to the preset delay duration. When the timer counts down from the initial value to 0, or from 0 to the preset delay duration, the timer is considered to be timed out.
  • the CSFB request may be carried in the CM Service Request message sent by the non-access stratum of the terminal, although the circuit switched service request message is not actually initiated by the CSFB process (ie, the terminal does not return to the LTE, therefore There is no need to fall back to the 3G (or 2G) network by the LTE network.
  • the circuit switched service request message still carries the CSFB indication to instruct the MSC Server to send a connection release message carrying the CSFB indication after the circuit switched service is completed to trigger the RNS. (or BSS) triggers the terminal to return to E-UTRAN.
  • Step 460 The terminal continues to camp on the 3G (or 2G) network to perform subsequent one or more circuit switched services until the timer expires;
  • Step 470 The terminal returns to the LTE network.
  • the timer expires (for example, from the initial value to 0)
  • the terminal is in the idle state at this time, that is, the wireless connection between the terminal and the RNS (or BSS) is released, if the terminal receives the RNS sent last time.
  • the RRC Connection Release message (or the Channel Release message sent by the BSS) includes information about the Redirect to the E-UTRAN, and the terminal selects the E-UTRAN cell according to the Redirect information, and accesses the selected E-UTRAN cell (ie, quickly returns) To E-UTRAN); if the RRC Connection Release message (or the Channel Release message sent by the BSS) sent by the RNS received by the terminal does not contain the information related to Redirect to E-UTRAN, the terminal performs a cell reselection process and selects E- The UTRAN cell is also connected (ie, returned to E-UTRAN).
  • the terminal waits for the RNS to send.
  • RRC Connection Release message (or Channel Release message sent by BSS).
  • the terminal When the terminal receives the RRC Connection Release message (or the Channel Release message sent by the BSS) sent by the RNS, if the RRC Connection Release message (or the Channel Release message sent by the BSS) sent by the RNS includes related information redirected to the E-UTRAN, The terminal selects an E-UTRAN cell according to the redirection information, and accesses the selected E-UTRAN cell (ie, quickly returns to the E-UTRAN); if the RNS sends an RRC Connection Release message (or a Channel Release message sent by the BSS) Without the relevant information redirected to the E-UTRAN, the terminal performs a cell reselection procedure, selects the E-UTRAN cell and accesses (ie returns to E-UTRAN).
  • the embodiment of the present invention provides a schematic structural diagram of a terminal 5000, where the terminal 5000 includes a processing unit 50, a starting unit 51, a determining unit 52, a triggering unit 53, and a reset unit. 54 and return unit 55, wherein:
  • the processing unit 50 is configured to perform circuit switching services in a first network supporting circuit switched services
  • the starting unit 51 is configured to start a timer after the processing unit 50 performs a circuit switching service in the first network
  • the determining unit 52 is configured to determine, after the startup unit 51 starts the timer, whether the circuit switching service needs to be executed again before the timer expires;
  • the triggering unit 53 is configured to determine, by the unit 52, that the circuit is required to be executed again before the timer expires. When the service is changed, the timer is stopped, and the trigger processing unit 50 performs the circuit switching service again in the first network;
  • the resetting unit 54 is configured to reset the timer after the processing unit 50 performs the circuit switching service again;
  • the returning unit 55 is configured to return to the second network that does not support the circuit switched service when it is determined that the preset condition is met.
  • a recording unit after the determining unit 52 determines that the circuit switching service needs to be performed again before the timer expires, recording a delay before the processing unit 50 performs the circuit switching service again. frequency;
  • the recording unit is configured to record the number of delays before the returning unit 55 returns to the second network that does not support the circuit switched service after the processing unit 50 performs the circuit switching service again.
  • the preset condition includes at least one of the following: the number of delays of the record reaches a preset delay number, and the duration recorded by the timer reaches a preset delay duration;
  • the preset delay number refers to the number of circuit-switched services that the terminal is allowed to perform in the first network after performing the circuit-switched service and before returning to the second network.
  • the determining unit 52 is further configured to:
  • the second network does not support at least one of a packet switched voice service and a supplementary service
  • the type of service that determines the circuit switched service is a supplementary service.
  • the determining unit 52 is further configured to:
  • the starting unit 51 is specifically configured to:
  • the timer is started according to the received message carrying the delay indication, and the delay indication is used to instruct the terminal to delay returning to the second network.
  • the delay indication includes one of a preset delay duration and a preset delay duration, or any combination thereof.
  • the method further includes a sending unit, where the sending unit is configured to send a circuit switched service request message to the mobile switching center server, where the circuit switching service request message carries a circuit switched fallback indication.
  • FIG. 5B is a schematic structural diagram of a terminal 5000 according to an embodiment of the present invention.
  • the terminal 5000 includes a transceiver 500, a communication bus 510, a memory 520, and a processor 530, where:
  • a communication bus 510 for connection communication between the processor 530, the transceiver 500, and the memory 520;
  • the transceiver 500 is configured to communicate with the terminal 5000 and the outside;
  • a memory 520 configured to store program code
  • the processor 530 is configured to call the program code stored in the memory 520, and perform the following operations:
  • the terminal provided in accordance with the embodiment of the present invention may correspond to the terminal in the foregoing communication method, and the operations and/or functions of the respective modules in the terminal respectively implement the corresponding processes of the method in FIG. 1A, for the sake of brevity, no longer Narration.
  • a computer readable medium comprising computer readable instructions that, when executed, perform the operations of 100 to 130 of the methods in the above embodiments. Alternatively, the operations of the optional steps in the method in the above embodiments may also be performed.
  • a computer program product including the computer readable medium described above.
  • the terminal provided in the embodiment of the present invention does not immediately return to the second network after performing the circuit switching service in the first network, but resides in the first network for a preset delay duration, in a preset delay.
  • the circuit switching service may be executed again at least once in the duration, and then returned to the second network when the preset condition is met.
  • the process of returning from the first network to the second network after the terminal performs the circuit switching service is avoided; when the circuit switching service is performed again, the terminal falls back from the second network to the first network. Therefore, the above technical solution can reduce the power consumption of the terminal and shorten the delay of the circuit switching service.
  • the embodiment of the present invention provides a schematic structural diagram of a terminal 6000.
  • the terminal 6000 includes a processing unit 60, a starting unit 61, a determining unit 62, a triggering unit 63, and a returning unit 64. ,among them:
  • the processing unit 60 is configured to perform a circuit switching service in the first network supporting the circuit switched service
  • the starting unit 61 is configured to start a timer after the processing unit 60 performs the circuit switching service in the first network;
  • the determining unit 62 is configured to determine, after the start unit 61 starts the timer, whether the circuit switching service needs to be performed again before the timer expires;
  • the triggering unit 63 is configured to: when the determining unit 62 determines that the circuit-switched service needs to be performed again before the timer expires, the trigger processing unit 60 performs the circuit-switched service again in the first network;
  • the returning unit 64 is configured to return to the second network that does not support the circuit switched service when determining that the timer expires.
  • the determining unit 62 is further configured to:
  • the second network does not support at least one of a packet switched voice service and a supplementary service
  • the type of service that determines the circuit switched service is a supplementary service.
  • the determining unit 62 is further configured to:
  • the starting unit 61 is specifically configured to:
  • the timer is started according to the received message carrying the delay indication, and the delay indication is used to instruct the terminal to delay returning to the second network.
  • the delay indication includes a preset delay duration.
  • the method further includes: a sending unit, configured to send a circuit switched service request message to the mobile switching center server, where the circuit switched service request message carries a circuit switched fallback indication.
  • FIG. 6B is a schematic structural diagram of a terminal 6000 according to an embodiment of the present invention.
  • the terminal 6000 includes a transceiver 600, a communication bus 610, a memory 620, and a processor 630, where:
  • a communication bus 610 for connection communication between the processor 630, the transceiver 600, and the memory 620;
  • the transceiver 600 is configured to communicate with the terminal 6000 and the outside;
  • a memory 620 configured to store program code
  • the processor 630 is configured to call the program code stored in the memory 620, and perform the following operations:
  • the second network that does not support the circuit switched service is returned.
  • the terminal provided by the embodiment of the present invention may correspond to the terminal in the foregoing communication method, and the operations and/or functions of the respective modules in the terminal respectively implement the corresponding processes of the method in FIG. 1B. Narration.
  • a computer readable medium comprising computer readable instructions that, when executed, perform the operations of 1000 to 1200 of the method in the above embodiments. Alternatively, the operations of the optional steps in the method in the above embodiments may also be performed.
  • a computer program product including the computer readable medium described above.
  • the terminal provided in the embodiment of the present invention does not immediately return to the second network after performing the circuit switching service in the first network, but resides in the first network for a preset delay duration within a preset delay duration. Can perform at least one circuit switching service again, and then return to the second when the preset condition is met.
  • the internet The process of returning from the first network to the second network after the terminal performs the circuit switching service is avoided; when the circuit switching service is performed again, the terminal falls back from the second network to the first network. Therefore, the above technical solution can reduce the power consumption of the terminal and shorten the delay of the circuit switching service.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus functions in one or more blocks of a flow or a flow diagram and/or block diagram of a flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions in one or more blocks of the flowchart or in a flow or block of the flowchart.

Abstract

本发明涉及通信技术领域，尤其涉及一种处理电路交换业务的方法及终端，在该方法中，终端在执行完本次电路交换业务后要再次执行一次电路交换业务时，终端没有立即回到第一网络，而是再次执行电路交换业务，当满足预设条件时，再返回第一网络，避免了每执行完一次电路交换业务后要先从第二网络返回至第一网络，再次执行电路交换业务时，再从第一网络回落到第二网络的过程，因此，降低了终端的功耗、提高了无线资源的利用率，及缩短了电路交换业务的时延。

Description

一种处理电路交换业务的方法及终端 技术领域
本发明涉及通信技术领域，特别涉及一种处理电路交换业务的方法及终端。
背景技术
无线移动通信系统经历了由2G通信系统，例如，GSM(英文全称：Global System For Mobile Communication)、3G通信系统，例如，UMTS(英文全称：Universal Mobile Telecommunications System)到4G通信系统的演进。4G通信系统采用LTE(英文全称：Long Term Evolution)接入技术，其接入网称为E-UTRAN(英文全称：Evolved Universal Terrestrial Radio Access Network)。
LTE网络是分组交换(英文全称：Packet Switched，缩写：PS)网络，无法提供电路交换(英文全称：Circuit Switched，缩写：CS)业务，采用电路交换回落(英文全称：Circuit Switched Fallback，缩写：CSFB)作为LTE网络中一种电路交换业务的解决方案。CSFB的主要思想是：终端驻留在E-UTRAN，当终端执行电路交换业务时，终端从LTE网络回落到2G网络或者3G网络，终端在2G网络或者3G网络中完成电路交换业务，具体过程如下：
终端要发起电路交换业务时，终端要先从LTE网络回落到2G网络或者3G网络，终端执行完一次电路交换业务后会回到LTE网络。若终端接着再次发起电路交换业务，终端需要再从LTE网络回落到2G网络或者3G网络，终端执行完这次电路交换业务后，会再次回到LTE网络。若终端在预设时间段内要多次发起电路交换业务时，终端需要执行多次从LTE网络回落到2G网络或者3G网络的操作，及执行多次从2G网络或者3G网络返回到LTE网络的操作。因此，存在终端功耗较大及电路交换业务时延较大的缺陷。
综上所述，目前处于LTE网络中的终端在处理电路交换业务的过程中，存在终端功耗较大及电路交换业务时延较大的缺陷。
发明内容
本发明实施例提供一种处理电路交换业务的方法及终端，用以解决目前存在的终端功耗较大及电路交换业务时延较大的缺陷。
第一方面，提供一种处理电路交换业务的方法，包括：
终端在支持电路交换业务的第一网络内执行完一次所述电路交换业务后，启动定时器；
所述终端确定在所述定时器超时前需要再次执行所述电路交换业务时，停止所述定时器，在所述第一网络内再次执行所述电路交换业务；
所述终端再次执行完所述电路交换业务后，重置所述定时器；
所述终端在确定满足预设条件时，返回不支持所述电路交换业务的第二网络。
结合第一方面，在第一种可能的实现方式中，所述终端确定在所述定时器超时前需要再次执行所述电路交换业务之后，所述终端再次执行所述电路交换业务之前，还包括：
所述终端记录一次延迟次数；
或者
所述终端再次执行完所述电路交换业务后，返回不支持所述电路交换业务的第二网络之前，还包括：
所述终端记录一次延迟次数。
结合第一方面，或者第一方面的第一种可能的实现方式，在第二种可能的实现方式中，所述预设条件包括以下至少一种：记录的延迟次数达到预设延迟次数、所述定时器所记录的时长达到预设延迟时长；
其中，所述预设延迟次数是指所述终端在执行完一次所述电路交换业务后，并在返回所述第二网络前，在所述第一网络内允许执行的所述电路交换 业务的次数。
结合第一方面，以及第一方面的第一种至第二种任一项可能的实现方式，在第三种可能的实现方式中，所述终端启动所述定时器之前，还包括：
所述终端确定所述终端的类型符合预设类型；或，
所述终端确定所述第二网络不支持分组交换语音业务和补充业务中的至少一种；或，
所述终端确定所述电路交换业务的业务类型为补充业务。
结合第一方面的第二种可能的实现方式，在第四种可能的实现方式中，所述终端在启动所述定时器之前，还包括：
所述终端确定所述预设延迟时长和所述预设延迟次数中的至少一种。
结合第一方面的第二种至第四种任一项可能的实现方式，在第五种可能的实现方式中，所述终端启动定时器，包括：
所述终端根据收到的携带延迟指示的消息启动所述定时器，所述延迟指示用于指示所述终端延迟返回所述第二网络。
结合第一方面的第五种可能的实现方式，在第六种可能的实现方式中，所述延迟指示中包括预设延迟时长和预设延迟次数中的一种或者任意组合。
结合第一方面，或者第一方面的第六种可能的实现方式，在第七种可能的实现方式中，所述终端再次执行电路交换业务之前，还包括：
所述终端向移动交换中心服务器发送电路交换业务请求消息，所述电路交换业务请求消息中携带电路交换回落指示。
第二方面，提供一种处理电路交换业务的方法，包括：
终端在支持电路交换业务的第一网络内执行完一次所述电路交换业务后，启动定时器；
所述终端确定在所述定时器超时前需要再次执行所述电路交换业务时，在所述第一网络内再次执行所述电路交换业务；
所述终端再次执行完所述电路交换业务后，确定所述定时器超时时，返回不支持所述电路交换业务的第二网络。
结合第二方面，在第一种可能的实现方式中，所述终端启动所述定时器之前，还包括：
所述终端确定所述终端的类型符合预设类型；或，
所述终端确定所述第二网络不支持分组交换语音业务和补充业务中的至少一种；或，
所述终端确定所述电路交换业务的业务类型为补充业务。
结合第二方面，或者第二方面的第一种可能的实现方式，在第二种可能的实现方式中，所述终端在启动所述定时器之前，还包括：
所述终端确定预设延迟时长。
结合第二方面，以及第二方面的第一种至第二种任一项可能的实现方式，在第三种可能的实现方式中，所述终端启动定时器，包括：
所述终端根据收到的携带延迟指示的消息启动所述定时器，所述延迟指示用于指示所述终端延迟返回所述第二网络。
结合第二方面的第三种可能的实现方式，在第四种可能的实现方式中，所述延迟指示中包括预设延迟时长。
结合第二方面，以及第二方面的第一种至第三种任一项可能的实现方式，在第四种可能的实现方式中，所述终端再次执行所述电路交换业务之前，还包括：
所述终端向移动交换中心服务器发送电路交换业务请求消息，所述电路交换业务请求消息中携带电路交换回落指示。
第三方面，提供一种终端，包括：
处理单元，用于在支持电路交换业务的第一网络内执行所述电路交换业务；
启动单元，用于在所述处理单元在所述第一网络内执行完一次所述电路交换业务后，启动定时器；
确定单元，用于在所述启动单元启动所述定时器后确定在所述定时器超时前是否需要再次执行所述电路交换业务；
触发单元，用于所述确定单元确定在所述定时器超时前需要再次执行所述电路交换业务时，停止所述定时器，触发所述处理单元在所述第一网络内再次执行所述电路交换业务；
重置单元，用于在所述处理单元再次执行完所述电路交换业务后，重置所述定时器；
返回单元，用于在确定满足预设条件时，返回不支持电路交换业务的第二网络。
结合第三方面，在第一种可能的实现方式中，还包括：记录单元，所述记录单元用于在所述确定单元确定在所述定时器超时前需要再次执行所述电路交换业务之后，在所述处理单元再次执行所述电路交换业务之前，记录一次延迟次数；
或者
所述记录单元用于在所述处理单元再次执行完所述电路交换业务后，所述返回单元返回不支持所述电路交换业务的第二网络之前，记录一次延迟次数。
结合第三方面，或者第三方面的第一种可能的实现方式，在第二种可能的实现方式中，所述预设条件包括以下至少一种：记录的延迟次数达到预设延迟次数、所述定时器所记录的时长达到预设延迟时长；
其中，所述预设延迟次数是指所述终端在执行完一次所述电路交换业务后，并在返回所述第二网络前，在所述第一网络内允许执行的所述电路交换业务的次数。
结合第三方面，以及第三方面的第一种至第二种任一项可能的实现方式，在第三种可能的实现方式中，所述确定单元在所述启动单元启动所述定时器之前，还用于：
确定所述终端的类型符合预设类型；或，
确定所述第二网络不支持分组交换语音业务和补充业务中的至少一种；或，
确定所述电路交换业务的业务类型为补充业务。
结合第三方面的第二种或第三种可能的实现方式，在第四种可能的实现方式中，所述确定单元在所述启动单元启动所述定时器之前，还用于：
确定所述预设延迟时长和所述预设延迟次数中的至少一种。
结合第三方面的第二种至第四种任一项可能的实现方式，在第五种可能的实现方式中，所述启动单元具体用于：
在所述处理单元在所述第一网络内执行完一次所述电路交换业务后根据收到的携带延迟指示的消息启动所述定时器，所述延迟指示用于指示所述终端延迟返回所述第二网络。
结合第三方面的第五种可能的实现方式，在第六种可能的实现方式中，所述延迟指示中包括预设延迟时长和预设延迟次数中的一种或者任意组合。
结合第三方面，或者第三方面的第六种可能的实现方式，在第七种可能的实现方式中，还包括：发送单元，所述发送单元用于向移动交换中心服务器发送电路交换业务请求消息，所述电路交换业务请求消息中携带电路交换回落指示。
第四方面，提供一种终端，包括：
处理单元，用于在支持电路交换业务的第一网络内执行完一次所述电路交换业务；
启动单元，用于在所述处理单元在所述第一网络内执行完所述电路交换业务后，启动定时器；
确定单元，用于在所述启动单元启动所述定时器后，确定在所述定时器超时前是否需要再次执行所述电路交换业务；
触发单元，用于在所述确定单元确定在所述定时器超时前需要再次执行所述电路交换业务时，触发所述处理单元在所述第一网络内再次执行所述电路交换业务；
返回单元，用于在确定所述定时器超时时，返回不支持所述电路交换业务的第二网络。
结合第四方面，在第一种可能的实现方式中，所述确定单元还用于：
确定所述终端的类型符合预设类型；或，
确定所述第二网络不支持分组交换语音业务和补充业务中的至少一种；或，
确定所述电路交换业务的业务类型为补充业务。
结合第四方面，或者第四方面的第一种可能的实现方式，在第二种可能的实现方式中，所述确定单元还用于：
确定预设延迟时长。
结合第四方面，以及第四方面的第一种至第二种任一项可能的实现方式，在第三种可能的实现方式中，所述启动单元具体用于：
在所述处理单元在所述第一网络内执行完所述电路交换业务后，根据收到的携带延迟指示的消息启动所述定时器，所述延迟指示用于指示所述终端延迟返回所述第二网络。
结合第四方面的第三种可能的实现方式，在第四种可能的实现方式中，所述延迟指示中包括预设延迟时长。
结合第四方面，以及第四方面的第一种至第三种任一项可能的实现方式，在第四种可能的实现方式中，还包括：发送单元，所述发送单元用于向移动交换中心服务器发送电路交换业务请求消息，所述电路交换业务请求消息中携带电路交换回落指示。
第五方面，提供一种终端，包括收发器、通信总线、存储器及处理器，其中：
所述通信总线，用于所述处理器、所述收发器及所述存储器之间的连接通信；
所述收发器，用于所述终端与外部的通信；
所述存储器，用于存储程序代码；
所述处理器，用于调用所述存储器中存储的程序代码，并执行如第一方面，以及第一方面的第一种至第七种任一项可能的实现方式所述的方法。
第六方面，提供一种终端，包括收发器、通信总线、存储器及处理器，其中：
所述通信总线，用于所述处理器、所述收发器及所述存储器之间的连接通信；
所述收发器，用于所述终端与外部的通信；
所述存储器，用于存储程序代码；
所述处理器，用于调用所述存储器中存储的程序代码，并执行如第二方面，以及第二方面的第一种至第五种任一项可能的实现方式所述的方法。
本发明实施例中，终端在第一网络内执行完一次电路交换业务后，终端没有立即回到第二网络，而是在第一网络内驻留预设延迟时长。终端在预设延迟时长内可以再次执行至少一次电路交换业务。终端当满足预设条件时再返回第二网络。避免了终端每执行完一次电路交换业务后要先从第一网络返回至第二网络；终端在再次执行电路交换业务时，终端再从第二网络回落到第一网络的过程。因此，采用上述技术方案可以降低终端的功耗及缩短电路交换业务的时延。
附图说明
图1A为本发明实施例中处理电路交换业务的一种流程图；
图1B为本发明实施例中处理电路交换业务的一种流程图；
图2为本发明实施例中处理电路交换电路交换业务的一种实施例；
图3为本发明实施例中处理电路交换电路交换业务的另一种实施例；
图4为本发明实施例中处理电路交换电路交换业务的另一种实施例；
图5A为本发明实施例中终端的一种结构示意图；
图5B为本发明实施例中终端的另一种结构示意图；
图6A为本发明实施例中终端的另一种结构示意图；
图6B为本发明实施例中终端的另一种结构示意图。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
另外，本文中术语“系统”和“网络”在本文中常被可互换使用。本文中术语“和/或”，仅仅是一种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这三种情况。另外，本文中字母“/”，一般表示前后关联对象是一种“或”的关系。
下面结合说明书附图对本发明优选的实施方式进行详细说明，应当理解，此处所描述的优选实施例仅用于说明和解释本发明，并不用于限定本发明，并且在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。
应理解，本文中涉及的终端(例如，手机)包括接入层(英文全称：Access Stratum，缩写：AS)和非接入层(英文：Non-Access Stratum，缩写：NAS)。
下面结合附图对本发明优选的实施方式进行详细说明。
参阅图1A所示，本发明实施例中，处理电路交换业务的一种流程如下：
实施例一
步骤100：终端在支持电路交换业务的第一网络内执行完一次电路交换业务后，启动定时器；
步骤110：终端确定在定时器超时前需要再次执行电路交换业务时，停止定时器，在第一网络内再次执行电路交换业务；
步骤120：终端再次执行完电路交换业务后，重置定时器；
步骤130：终端在确定满足预设条件时，返回不支持电路交换业务的第二网络。
本发明实施例中，第一网络可以为LTE网络，第二网络可以为2G网络或者3G网络，当然，随着科技的发展，第一网络也可以为其他制式的网络， 在此不再进行一一详述。应理解：LTE网络为支持LTE的网络；2G网络为支持2G的网络；3G网络为支持3G的网络。
本发明实施例中，电路交换业务包括语音呼叫业务和补充业务(英文全称：Supplementarty Service)。
本发明实施例中，终端确定在定时器超时前需要再次执行电路交换业务之后，终端再次执行电路交换业务之前，还包括如下操作：
终端记录一次延迟次数。
此时，记录延迟次数可以在停止定时器之前，也可以是在停止定时器之后。
或者
终端再次执行完电路交换业务后，返回不支持电路交换业务的第二网络之前，还包括如下：
终端记录一次延迟次数。
此时，记录延迟次数可以在重置定时器之前，也可以是在重置定时器之后。也就是说，实施例一中该终端要记录一次延迟次数，但是，该终端记录延迟次数可以是在该终端确定需要再次执行电路交换业务时执行，也可以是在该终端再次执行完电路交换业务后执行。在实际应用中，上述两种方式可以灵活应用，在此不再进行详述。
本发明实施例中，可选的，预设条件包括以下至少一种：记录的延迟次数达到预设延迟次数和定时器所记录的时长达到预设延迟时长，预设延迟次数是指终端在执行完一次电路交换业务后，并在返回第二网络前，在第一网络内允许执行的电路交换业务的次数。
本发明实施例中，终端启动定时器之前，还包括如下操作：
终端确定终端的类型符合预设类型；或，
终端确定第二网络不支持分组交换分组交换语音业务和补充业务中的至少一种；或，
终端确定电路交换业务的业务类型为补充业务。
也就是说，上述三个确定结果可以为触发定时器启动的条件，例如，终端确定终端的类型符合预设类型时，终端启动定时器，如确定终端的类型不符合预设类型时，则终端返回第一网络。同理，如果终端确定第二网络支持分组交换语音业务及补充业务中的任意一种时，则终端返回第一网络。
本发明实施例中，终端在启动定时器之前，还包括：
终端确定预设延迟时长和预设延迟次数中的至少一种。
本发明实施例中，终端启动定时器的方式有多种，可选的，可以为如下方式：
终端根据接收到的携带延迟指示的消息启动定时器；其中，延迟指示用于指示终端延迟返回第二网络。
本发明实施例中，终端根据接收到的携带延迟指示的消息启动定时器时，具体可以为如下方式：
终端调用接入层根据接收到的终端的非接入层发送的携带延迟指示的消息启动定时器。
本发明实施例中，携带延迟指示的消息可以为一个新构造的消息，也可以为一个已有的消息。
本发明实施例中，延迟指示中包括预设延迟时长和预设延迟次数中的一种或者任意组合，预设延迟次数是指终端在执行完一次电路交换业务后，并在返回第二网络前，在第一网络内允许执行的电路交换业务的次数。
可选的，预设延迟次数为1，2或N，N为不等于1(或2)的正整数。
延迟指示可以由消息中的几个指定比特位上的赋值表示，如消息的某一个比特位上的赋值表示预设延迟时长，消息的另一个比特位上的赋值表示预设延迟次数，消息的不同于前两个比特位的另一个比特位上的赋值表示延迟返回。应理解：可以在一个消息中同时携带这三个比特位上的赋值，也可以在一个消息中仅仅携带这三个比特位上的赋值中的至少一个，例如，消息中仅携带表示延迟返回的赋值。此外，这三个比特位的前后顺序不做限定。应理解：上述仅仅是表示延迟指示一种方案，并不构成限定。例如，延迟指示 也可以由消息中一个比特位上的赋值来表示延迟返回，预设延迟时长及预设延迟次数中的至少一种。
可选的，终端也可以直接在接入层中设置预设延迟时长及预设延迟次数，终端的接入层不需要从非接入层获取上述两个参数，也就是说，终端启动定时器，可以采用如下方式：
确定预设延迟时长和/或预设延迟次数时，启动定时器。
其中，预设延迟次数是指终端在执行完一次电路交换业务后，并在返回第二网络前，在第一网络内执行的电路交换业务的次数。
例如：预设延迟时长为T秒，终端启动定时器后，终端在定时器的计时时长为s1秒(s1<T)时确定要执行一次电路交换业务，则终端停止定时器，终端完成该次电路交换业务后，终端重置定时器(定时器再重新计时)，终端在确定要执行该次电路交换业务或完成该次电路交换业务时记录延迟次数为1次。接下来终端在定时器的计时时长为s2秒(s2<T)时确定要执行一次电路交换业务，则终端停止定时器，终端完成该次电路交换业务后，终端重置定时器(定时器再重新计时)，终端在确定要执行该次电路交换业务或完成该次电路交换业务时记录延迟次数为2次。依次类推，若预设延迟次数为N，则终端在记录延迟次数达到N次且完成该次电路交换业务后，返回LTE网络。或者，若预设延迟次数为N，终端在完成第m(m<N)次电路交换业务后，重置定时器(定时器重新计时)，若此次，终端在定时器超时前未执行电路交换业务，则终端在定时器超时时返回LTE网络。
本发明实施例中，终端再次执行电路交换业务之前，还包括如下操作：
终端向移动交换中心服务器发送电路交换业务请求消息，电路交换业务请求消息中携带电路交换回落指示。
电路交换回落(英文全称：CS Fallback，缩写：CSFB)指示，可以为电路交换回落主叫(英文全称：CS Fallback Mobile Originating Call，缩写：CSMO)指示，或者为电路交换回落被叫(英文全称：CS Fallback Mobile Terminating Call，缩写：CSMT)指示。
本发明实施例中，终端返回第二网络的方式有多种，可选的，可以采用如下方式：
终端接收网络侧发送的连接释放消息；
终端根据连接释放消息返回第二网络。
其中，连接释放消息可以为无线网络子系统(英文全称：Radio Network Subsystem，缩写：RNS)发送的无线资源控制(英文全称：Radio Resource Control，缩写：RRC)Connection Release消息；或者，连接释放消息可以为基站子系统(英文全称：Base Station Subsystem，缩写：BSS)发送的Channel Release消息。
若RRC Connection Release消息或Channel Release消息中包含重定向(英文全称：Redirect))到第二网络中的小区的相关信息(例如，E-UTRAN小区的频率信息等)，终端在返回第二网络时，选择并接入该E-UTRAN小区。
若RRC Connection Release消息或Channel Release消息中不包含Redirect到第二网络中的小区的相关信息，终端在返回第二网络时，要重新选择E-UTRAN小区并接入。
本发明实施例中，终端调用接入层通过读取配置参数CSFB_WAIT_ENABLED的赋值来确定启动本发明实施例的流程，还是执行现有技术中的流程，如CSFB_WAIT_ENABLED＝1，终端启动本发明实施例的流程，若CSFB_WAIT_ENABLED＝0，终端启动现有流程。
综上所述，本发明实施例中，提供了一种处理电路交换业务的方法，终端在第一网络内执行完一次电路交换业务后，终端没有立即回到第二网络，而是在第一网络内驻留预设延迟时长。终端在预设延迟时长内可以再次执行至少一次电路交换业务。终端当满足预设条件时再返回第二网络。避免了终端每执行完一次电路交换业务后要先从第一网络返回至第二网络；终端在再次执行电路交换业务时，终端再从第二网络回落到第一网络的过程。因此，采用上述技术方案可以降低终端的功耗及缩短电路交换业务的时延。
参阅图1B所示，本发明实施例中，处理电路交换业务的另一种流程如下：
实施例二
步骤1000：终端在支持电路交换业务的第一网络内执行完一次电路交换业务后，启动定时器；
步骤1100：终端确定在定时器超时前需要再次执行电路交换业务时，在第一网络内再次执行电路交换业务；
步骤1200：终端再次执行完电路交换业务后，确定定时器超时时，返回不支持电路交换业务的第二网络。
本发明实施例中，第一网络可以为LTE网络，第二网络可以为2G网络或者3G网络，当然，随着科技的发展，第一网络也可以为其他制式的网络，在此不再进行一一详述。应理解：LTE网络为支持LTE的网络；2G网络为支持2G的网络；3G网络为支持3G的网络。
本发明实施例中，电路交换业务包括语音呼叫业务和补充业务。
终端启动定时器之前，还包括如下操作：
终端确定终端的类型符合预设类型；或，
终端确定第二网络不支持分组交换语音业务和补充业务中的至少一种；或，
终端确定电路交换业务的业务类型为补充业务。
也就是说，上述三个确定结果可以为触发定时器启动的条件，例如，终端确定终端的类型符合预设类型时，终端启动定时器，如确定终端的类型不符合预设类型时，则终端返回第一网络。同理，如果终端确定第二网络支持分组交换语音业务和补充业务中的任意一种时，则终端返回第一网络。
本发明实施例中，预设类型可以为以语音业务为主的类型，当然，还可以为其他的类型，在此不再进行一一详述。
本发明实施例中，终端在启动定时器之前，还包括如下操作：
终端确定预设延迟时长。
本发明实施例中，终端启动定时器的方式有多种，可选的，也可以采用如下方式：
终端根据收到的携带延迟指示的消息启动定时器，延迟指示用于指示终端延迟返回第二网络。
本发明实施例中，终端根据收到的携带延迟指示的消息启动定时器时，可以采用如下方式：
终端调用接入层根据收到的终端的非接入层发送的携带延迟指示的消息启动定时器。
本发明实施例中，可选的，延迟指示中包括预设延迟时长。
本发明实施例中，终端再次执行电路交换业务之前，还包括如下操作：
终端向移动交换中心服务器发送电路交换业务请求消息；
其中，电路交换业务请求消息中携带电路交换回落指示。
本发明实施例中，电路交换回落指示，可以为电路交换回落主叫指示，或者也可以为电路交换回落被叫指示。
例如：预设延迟时长为T秒，终端启动定时器后，终端在定时器的计时时长为s1秒(s1<T)时确定要执行一次电路交换业务，则终端执行该次电路交换业务。终端完成该次电路交换业务后，若此时定时器的计时时长小于T秒(即定时器未超时)，则终端等待下一次电路交换业务，不停止计时器；当终端在定时器的计时时长为s2秒(s2<T)时确定要再执行一次电路交换业务，则终端执行该次电路交换业务。终端完成该次电路交换业务后，若此时定时器的计时时长仍小于T秒(即定时器未超时)，则终端等待下一次电路交换业务，不停止计时器，以此类推，直至定时器所记录的时间(即计时时长)达到T秒，即定时器超时。
若定时器超时时终端处于连接态，即终端正在进行电路交换业务或终端与RNS(或BSS)之间存在无线连接，则终端完成正在进行的电路交换业务后(若终端正在进行电路交换业务)，依据RNS(或BSS)发送的连接释放消息释放无线连接，返回LTE网络。若定时器超时时终端处于空闲态，即终端与RNS(或BSS之间)不存在无线连接，则终端直接返回LTE网络。
在实施例二中，在定时器超时前，终端可以执行一次或者一次以上的电 路交换业务，只要定时器没有超时，终端需要执行电路交换业务时就可以执行电路交换业务。
为了更好地理解本发明实施例，以下给出具体应用场景，针对处理电路交换业务的过程，作出进一步详细描述，如图2所示：
实施例三
步骤200：终端在LTE网络中执行电路交换业务；
步骤210：终端在执行完本次电路交换业务后，判断自身是否为以语音业务为主的终端，若是，执行步骤220，否则，执行步骤270；
步骤220：终端判断CSFB_WAIT_ENABLED是否为1，若是，执行步骤230，否则，执行步骤270；
步骤230：终端中的非接入层向终端的接入层发送携带预设延迟时长的消息；
步骤240：终端调用接入层从获取接收到的非接入层发送的消息中携带的预设延迟时长；
步骤250：终端启动定时器；
步骤260：终端在定时器记录的时长未达到预设延迟时长之前继续驻留在3G网络中执行电路交换业务，并定时器记录的时长达到预设延迟时长，执行步骤270；
在步骤260中，只要在定时器所记录的时长未达到预设延迟时长的情况下，终端只要需要执行电路交换业务，就可以执行电路交换业务。
步骤270：终端返回LTE网络。
在该实施例中，终端在3G网络执行完本次电路交换业务后，没有返回LTE网络，继续驻留在3G网络执行电路交换业务，在定时器超时前每执行完一次电路交换业务后，都没有立即返回LTE网络，当定时器所记录的时长达到预设延迟时长时，终端才返回LTE网络，因此，降低了终端的功耗且缩短了电路交换业务的时延。
实施例四
步骤300：终端由E-UTRAN(英文全称：Evolved Universal Terrestrial Radio Access Network)(LTE的接入网)回落到3G(或2G)网络执行本次电路交换业务，其中，电路交换业务可以为补充业务，或者，语音呼叫业务。
步骤310：终端回落到3G(或2G)网络后，向移动交换中心(英文全称：Mobile Switching Center，缩写：MSC)服务器发送第一个电路交换业务请求消息；
步骤320：终端的非接入层向接入层发送携带延迟指示的消息；
其中，延迟指示用于指示终端返回LTE网络。
在步骤320中，终端调用非接入层根据终端当前执行的电路交换业务的业务类型，确定是否向接入层发送携带延迟指示的消息，例如，若确定终端执行的电路交换业务为与呼叫无关的补充业务(如非结构化补充业务数据(英文全称：Unstructured Supplementary Service Data，缩写：USSD)业务)，终端调用非接入层向接入层发送携带延迟指示的消息。
延迟指示可以为预设标识，也可以为预设延迟时长，还可以为预设延迟次数，其中，预设延迟时长用来指示终端的接入层在完成本次电路交换业务后，回到LTE网络前等待下一次电路交换业务的最大时长，例如，预设延迟时长为30秒，则表示终端在完成本次电路交换业务后等待30秒，若没有新的电路交换业务要执行，则终端返回到LTE网络。
非接入层给接入层发送的携带延迟指示的消息可以仅仅携带用于指示延迟返回的预设标识，此时，接入层可以自行设置预设延迟时长。
其中，延迟指示还可以包括预设延迟次数，预设延迟次数是指终端在执行完一次电路交换业务后，并在返回LTE网络前，在第一网络内允许执行的电路交换业务的次数，可选的，延时延迟次数为1,2或N，N为不等于1(或2)的正整数。
本发明实施例中，终端可以根据配置参数CSFB_WAIT_ENABLED的赋值来确定是执行本发明实施例的流程，还是执行现有技术中的流程，如，若 CSFB_WAIT_ENABLED＝1，则终端启动本发明实施例的流程，若CSFB-WAIT_ENABLED＝0，则终端按照现有流程执行。
步骤330：终端和MSC Server交互电路交换消息，执行本次电路交换业务过程；
步骤340：终端在执行完本次电路交换业务后，接收到RNS发送的RRC Connection Release消息(或BSS发送的Channel Release消息)，终端启动定时器，等待下一次电路交换业务；
其中，若RNS发送的RRC Connection Release消息(或BSS发送的Channel Release消息)中包含Redirect到E-UTRAN的相关信息(例如，E-UTRAN小区的频率等信息)，终端不立即依据RRC Connection Release消息(或BSS发送的Channel Release消息)选择并接入E-UTRAN小区(即快速返回到E-UTRAN)，而是启动定时器，用来等待下一次电路交换业务。
若RNS发送的RRC Connection Release消息(或BSS发送的Channel Release消息)中不包含Redirect到E-UTRAN的相关信息，终端不立即重新选择E-UTRAN小区并接入(即返回到E-UTRAN)，同理，也是启动定时器，用来等待下一次电路交换业务。
若在步骤320中，终端的非接入层发送的消息中携带的延迟指示不包括预设延迟时长，终端可以调用接入层设置预设延迟时长，例如，预设延迟时长CSFB_WAIT_TIME＝30秒。
步骤350：在定时器超时前，终端确定是否接收到来自非接入层发送的电路交换业务请求消息(即终端的非接入层发送的第二个电路交换业务请求消息)，若是，执行步骤360；否则，执行步骤370；
应理解：定时器计时，可以为由初始值倒计时至某一大于或等于0的值，或者也可以为由0计时至某一小于或等于预设延迟时长的值。当定时器由初始值倒计时至0，或者由0计时至预设延迟时长，视为定时器超时。
具体地，终端的非接入层发送的电路交换业务请求(CM Service Request)消息中可以携带CSFB指示，虽然该电路交换业务请求消息并非真正地通过 CSFB过程发起(即：终端没有返回LTE网络，因此不需要由LTE网络回落到3G(或2G)网络)，该电路交换业务请求消息仍然携带CSFB指示，以指示MSC Server在该次电路交换业务完成后发送携带CSFB指示的连接释放消息，以触发RNS(或BSS)触发终端返回到E-UTRAN。
步骤360：终端继续驻留在3G(或2G)网络执行第二次电路交换业务，并终止定时器的计时，执行步骤380；
步骤370：终端返回LTE网络；
在步骤370中，若步骤340中RNS发送的RRC Connection Release消息(或BSS发送的Channel Release消息)中包含Redirect到E-UTRAN的相关信息(即，重定向信息)，终端依据该重定向信息选择E-UTRAN小区，并接入到所选择的E-UTRAN小区(即快速返回到E-UTRAN)；若步骤340中RNS发送的RRC Connection Release消息(或BSS发送的Channel Release消息)不包含Redirect到E-UTRAN的相关信息，终端执行小区重选过程，选择E-UTRAN小区并接入(即返回到E-UTRAN)。
步骤380：终端在执行完本次电路交换业务后，接收到RNS发送的RRC Connection Release消息(或BSS发送的Channel Release消息)，终端启动定时器，等待下一次电路交换业务。
若终端执行完第二次电路交换业务后，若预设延迟次数为1，则终端执行步骤370。若预设延迟次数大于1，则终端记录延迟次数，并返回步骤340，直至定时器超时或所记录的延迟次数为预设延迟次数时，终端执行步骤370。
例如，若预设延迟次数为2，则终端执行完第二次电路交换业务后，终端记录延迟次数为1并启动定时器，在定时器超时前，终端接收到第三个电路交换业务请求，终端停止计时器的计时，终端执行第三次电路交换业务并记录延迟次数为2，所记录的延迟次数达到预设延迟次数了，因此，终端返回LTE网络。
实施例五
步骤400：终端由E-UTRAN(LTE的接入网)回落到3G(或2G)网络执行 本次电路交换业务；
其中，电路交换业务可以为补充业务，或者，语音呼叫业务。
步骤410：终端回落到3G(或2G)网络后，向MSC Server发送第一个电路交换业务请求消息；
步骤420：终端的非接入层向接入层发送携带延迟指示的消息；
其中，延迟指示用于指示终端返回LTE网络。
在步骤420中，终端可以根据终端的非接入层当前执行的电路交换业务的业务类型，确定是否调用非接入层向接入层发送携带延迟指示的消息，例如，若终端确定终端执行的电路交换业务为与呼叫无关的补充业务(如USSD业务)，终端调用非接入层向接入层发送携带延迟指示的消息。
延迟指示可以为预设标识，也可以为预设延迟时长，其中，预设延迟时长用来指示终端的接入层在完成本次电路交换业务后，回到LTE网络前等待新的电路交换业务的最大时长，例如，预设延迟时长为30秒，则表示终端在完成本次电路交换业务后等待30秒，若没有新的电路交换业务要执行，则终端返回到LTE网络。
非接入层给接入层发送的携带延迟指示的消息可以仅仅携带用于指示延迟返回的预设标识，此时，接入层可以自行设置预设延迟时长。
本发明实施例中，终端可以根据配置参数CSFB_WAIT_ENABLED的赋值来确定是执行本发明实施例的流程，还是执行现有技术中的流程，如，若CSFB_WAIT_ENABLED＝1，则终端启动本发明实施例的流程，若CSFB_WAIT_ENABLED＝0，则终端按照现有流程执行。
步骤430：终端和MSC Server交互电路交换消息，执行本次电路交换业务过程；
步骤440：终端在执行完本次电路交换业务后，接收到RNS发送的RRC Connection Release消息(或BSS发送的Channel Release消息)，终端启动定时器，等待后续电路交换业务；
其中：若RNS发送的RRC Connection Release消息(或BSS发送的Channel Release消息)中包含Redirect到E-UTRAN的相关信息(例如，E-UTRAN小区的频率等信息)，终端不立即依据RRC Connection Release消息(或BSS发送的Channel Release消息)选择并接入E-UTRAN小区(即快速返回到E-UTRAN)，而是启动定时器，用来等待后续电路交换业务。
若RNS发送的RRC Connection Release消息(或BSS发送的Channel Release消息)中不包含Redirect到E-UTRAN的相关信息，终端不立即重新选择E-UTRAN小区并接入(即返回到E-UTRAN)，同理，也是启动定时器，用来等待后续电路交换业务。
若在步骤420中，终端的非接入层发送的消息中携带的延迟指示不包括预设延迟时长，终端可以调用接入层设置预设延迟时长，例如，预设延迟时长CSFB_WAIT_TIME＝30秒。
步骤450：在定时器超时前，终端确定是否接收到来自非接入层发送的后续一个或多个电路交换业务请求消息，若是，终端执行步骤460；否则，终端执行步骤470；
应理解：定时器计时，可以为由初始值倒计时至某一大于或等于0的值，或者也可以为由0计时至某一小于或等于预设延迟时长的值。当定时器由初始值倒计时至0，或者由0计时至预设延迟时长，视为定时器超时。
具体地，终端的非接入层发送的电路交换业务请求(CM Service Request)消息中可以携带CSFB指示，虽然该电路交换业务请求消息并非真正地通过CSFB过程发起(即：终端没有返回LTE，因此不需要由LTE网络回落到3G(或2G)网络)，该电路交换业务请求消息仍然携带CSFB指示，以指示MSC Server在该次电路交换业务完成后发送携带CSFB指示的连接释放消息，以触发RNS(或BSS)触发终端返回到E-UTRAN。
步骤460：终端继续驻留在3G(或2G)网络执行后续一个或多个电路交换业务，直至定时器超时；
步骤470：终端返回LTE网络。
当定时器超时(例如，由初始值倒计时至0)时，若终端此时处于空闲态，即终端与RNS(或BSS)之间的无线连接已释放，若终端上一次接收到的RNS发送的RRC Connection Release消息(或BSS发送的Channel Release消息)中包含Redirect到E-UTRAN的相关信息，终端依据该Redirect信息选择E-UTRAN小区，并接入到所选择的E-UTRAN小区(即快速返回到E-UTRAN)；若终端上一次接收到的RNS发送的RRC Connection Release消息(或BSS发送的Channel Release消息)不包含Redirect到E-UTRAN的相关信息，终端执行小区重选过程，选择E-UTRAN小区并接入(即返回到E-UTRAN)。
当定时器超时(例如，由初始值倒计时至0)时，若终端此时处于连接态，即终端正在进行电路交换业务或终端与RNS(或BSS)之间存在无线连接，则终端等待RNS发送的RRC Connection Release消息(或BSS发送的Channel Release消息)。当终端接收到RNS发送的RRC Connection Release消息(或BSS发送的Channel Release消息)，若RNS发送的RRC Connection Release消息(或BSS发送的Channel Release消息)中包含重定向到E-UTRAN的相关信息，终端依据该重定向信息选择E-UTRAN小区，并接入到所选择的E-UTRAN小区(即快速返回到E-UTRAN)；若RNS发送的RRC Connection Release消息(或BSS发送的Channel Release消息)不包含重定向到E-UTRAN的相关信息，终端执行小区重选过程，选择E-UTRAN小区并接入(即返回到E-UTRAN)。
基于上述相应方法的技术方案，参阅图5A所示，本发明实施例提供一种终端5000的结构示意图，该终端5000包括处理单元50、启动单元51、确定单元52、触发单元53、重置单元54及返回单元55，其中：
处理单元50，用于在支持电路交换业务的第一网络内执行电路交换业务；
启动单元51，用于在处理单元50在第一网络内执行完一次电路交换业务后，启动定时器；
确定单元52，用于在启动单元51启动定时器后确定在定时器超时前是否需要再次执行电路交换业务；
触发单元53，用于确定单元52确定在定时器超时前需要再次执行电路交 换业务时，停止定时器，触发处理单元50在第一网络内再次执行电路交换业务；
重置单元54，用于在处理单元50再次执行完电路交换业务后，重置定时器；
返回单元55，用于在确定满足预设条件时，返回不支持电路交换业务的第二网络。
本发明实施例中，进一步的，还包括记录单元，记录单元用于在确定单元52确定在定时器超时前需要再次执行电路交换业务之后，在处理单元50再次执行电路交换业务之前，记录一次延迟次数；
或者
记录单元用于在处理单元50再次执行完电路交换业务后，返回单元55返回不支持电路交换业务的第二网络之前，记录一次延迟次数。
本发明实施例中，可选的，预设条件包括以下至少一种：记录的延迟次数达到预设延迟次数、定时器所记录的时长达到预设延迟时长；
其中，预设延迟次数是指终端在执行完一次电路交换业务后，并在返回第二网络前，在第一网络内允许执行的电路交换业务的次数。
本发明实施例中，进一步的，确定单元52在启动单元51启动定时器之前，还用于：
确定终端的类型符合预设类型；或，
确定第二网络不支持分组交换语音业务和补充业务中的至少一种；或，
确定电路交换业务的业务类型为补充业务。
本发明实施例中，进一步的，确定单元52在启动单元51启动定时器之前，还用于：
确定预设延迟时长和预设延迟次数中的至少一种。
本发明实施例中，可选的，启动单元51具体用于：
在处理单元50在第一网络内执行完一次电路交换业务后根据收到的携带延迟指示的消息启动定时器，延迟指示用于指示终端延迟返回第二网络。
本发明实施例中，可选的，延迟指示中包括预设延迟时长、预设延迟次数中的一种或者任意组合。
本发明实施例中，进一步的，还包括发送单元，发送单元用于向移动交换中心服务器发送电路交换业务请求消息，电路交换业务请求消息中携带电路交换回落指示。
如图5B所示，为本发明实施例提供的终端5000的结构示意图，该终端5000包括收发器500、通信总线510、存储器520及处理器530，其中：
通信总线510，用于处理器530、收发器500及存储器520之间的连接通信；
收发器500，用于终端5000与外部的通信；
存储器520，用于存储程序代码；
处理器530，用于调用存储器520中存储的程序代码，并执行如下操作：
在支持电路交换业务的第一网络内执行完一次电路交换业务后，启动定时器；
确定在定时器超时前需要再次执行电路交换业务时，停止定时器，在第一网络内再次执行电路交换业务；
再次执行完电路交换业务后，重置定时器；
在确定满足预设条件时，返回不支持电路交换业务的第二网络。应理解，根据本发明实施例提供的终端可对应于上述通信方法中的终端，并且终端中的各个模块的操作和/或功能分别实现图1A中方法的相应流程，为了简洁，在此不再赘述。
此外，还提供一种计算机可读介质，包括在被执行时执行以下操作的计算机可读指令：执行上述实施例中的方法的100至130的操作。可选的，还可以执行上述实施例中的方法中的可选步骤的操作。
另外，还提供一种计算机程序产品，包括上述计算机可读介质。
本发明实施例中提供的终端，在第一网络内执行完一次电路交换业务后，没有立即回到第二网络，而是在第一网络内驻留预设延迟时长，在预设延迟 时长内可以再次执行至少一次电路交换业务，当满足预设条件时再返回第二网络。避免了终端每执行完一次电路交换业务后要先从第一网络返回至第二网络；在再次执行电路交换业务时，终端再从第二网络回落到第一网络的过程。因此，采用上述技术方案可以降低终端的功耗及缩短电路交换业务的时延。
基于上述相应方法的技术方案，参阅图6A所示，本发明实施例提供一种终端6000的结构示意图，该终端6000包括处理单元60、启动单元61、确定单元62、触发单元63及返回单元64，其中：
处理单元60，用于在支持电路交换业务的第一网络内执行完一次电路交换业务；
启动单元61，用于在处理单元60在第一网络内执行完电路交换业务后，启动定时器；
确定单元62，用于在启动单元61启动定时器后，确定在定时器超时前是否需要再次执行电路交换业务；
触发单元63，用于在确定单元62确定在定时器超时前需要再次执行电路交换业务时，触发处理单元60在第一网络内再次执行电路交换业务；
返回单元64，用于在确定定时器超时时，返回不支持电路交换业务的第二网络。
本发明实施例中，进一步的，确定单元62还用于：
确定终端的类型符合预设类型；或，
确定第二网络不支持分组交换语音业务和补充业务中的至少一种；或，
确定电路交换业务的业务类型为补充业务。
本发明实施例中，进一步的，确定单元62还用于：
确定预设延迟时长。
本发明实施例中，可选的，启动单元61具体用于：
在处理单元60在第一网络内执行完电路交换业务后，根据收到的携带延迟指示的消息启动定时器，延迟指示用于指示终端延迟返回第二网络。
本发明实施例中，可选的，延迟指示中包括预设延迟时长。
本发明实施例中，进一步的，还包括：发送单元，发送单元用于向移动交换中心服务器发送电路交换业务请求消息，电路交换业务请求消息中携带电路交换回落指示。
如图6B所示，为本发明实施例提供的终端6000的结构示意图，该终端6000包括收发器600、通信总线610、存储器620及处理器630，其中：
通信总线610，用于处理器630、收发器600及存储器620之间的连接通信；
收发器600，用于终端6000与外部的通信；
存储器620，用于存储程序代码；
处理器630，用于调用存储器620中存储的程序代码，并执行如下操作：
在支持电路交换业务的第一网络内执行完一次电路交换业务后，启动定时器；
确定在定时器超时前需要再次执行电路交换业务时，在第一网络内再次执行电路交换业务；
再次执行完电路交换业务后，确定定时器超时时，返回不支持电路交换业务的第二网络。
应理解，根据本发明实施例提供的终端可对应于上述通信方法中的终端，并且终端中的各个模块的操作和/或功能分别实现图1B中方法的相应流程，为了简洁，在此不再赘述。
此外，还提供一种计算机可读介质，包括在被执行时执行以下操作的计算机可读指令：执行上述实施例中的方法的1000至1200的操作。可选的，还可以执行上述实施例中的方法中的可选步骤的操作。
另外，还提供一种计算机程序产品，包括上述计算机可读介质。
本发明实施例中提供的终端，在第一网络内执行完一次电路交换业务后，没有立即回到第二网络，而是在第一网络内驻留预设延迟时长，在预设延迟时长内可以再次执行至少一次电路交换业务，当满足预设条件时再返回第二 网络。避免了终端每执行完一次电路交换业务后要先从第一网络返回至第二网络；在再次执行电路交换业务时，终端再从第二网络回落到第一网络的过程。因此，采用上述技术方案可以降低终端的功耗及缩短电路交换业务的时延。
本发明是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中的功能的步骤。
尽管已描述了本发明的优选实施例，但本领域内的技术人员一旦得知了基本创造性概念，则可对这些实施例作出另外的变更和修改。所以，所附权利要求意欲解释为包括优选实施例以及落入本发明范围的所有变更和修改。
显然，本领域的技术人员可以对本发明实施例进行各种改动和变型而不脱离本发明实施例的精神和范围。这样，倘若本发明实施例的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。

Claims (30)

  1. 一种处理电路交换业务的方法，其特征在于，包括：
    终端在支持电路交换业务的第一网络内执行完一次所述电路交换业务后，启动定时器；
    所述终端确定在所述定时器超时前需要再次执行所述电路交换业务时，停止所述定时器，在所述第一网络内再次执行所述电路交换业务；
    所述终端再次执行完所述电路交换业务后，重置所述定时器；
    所述终端在确定满足预设条件时，返回不支持所述电路交换业务的第二网络。
  2. 如权利要求1所述的方法，其特征在于，所述终端确定在所述定时器超时前需要再次执行所述电路交换业务之后，所述终端再次执行所述电路交换业务之前，还包括：
    所述终端记录一次延迟次数；
    或者
    所述终端再次执行完所述电路交换业务后，返回不支持所述电路交换业务的第二网络之前，还包括：
    所述终端记录一次延迟次数。
  3. 如权利要求1或2所述的方法，其特征在于，所述预设条件包括以下至少一种：记录的延迟次数达到预设延迟次数、所述定时器所记录的时长达到预设延迟时长；
    其中，所述预设延迟次数是指所述终端在执行完一次所述电路交换业务后，并在返回所述第二网络前，在所述第一网络内允许执行的所述电路交换业务的次数。
  4. 如权利要求1-3任一项所述的方法，其特征在于，所述终端启动所述定时器之前，还包括：
    所述终端确定所述终端的类型符合预设类型；或，
    所述终端确定所述第二网络不支持分组交换语音业务和补充业务中的至少一种；或，
    所述终端确定所述电路交换业务的业务类型为补充业务。
  5. 如权利要求3所述的方法，其特征在于，所述终端在启动所述定时器之前，还包括：
    所述终端确定所述预设延迟时长和所述预设延迟次数中的至少一种。
  6. 如权利要求3-5任一项所述的方法，其特征在于，所述终端启动定时器，包括：
    所述终端根据收到的携带延迟指示的消息启动所述定时器，所述延迟指示用于指示所述终端延迟返回所述第二网络。
  7. 如权利要求6所述的方法，其特征在于，所述延迟指示中包括预设延迟时长和预设延迟次数中的一种或者任意组合。
  8. 如权利要求1-7任一所述的方法，其特征在于，所述终端再次执行电路交换业务之前，还包括：
    所述终端向移动交换中心服务器发送电路交换业务请求消息，所述电路交换业务请求消息中携带电路交换回落指示。
  9. 一种处理电路交换业务的方法，其特征在于，包括：
    终端在支持电路交换业务的第一网络内执行完一次所述电路交换业务后，启动定时器；
    所述终端确定在所述定时器超时前需要再次执行所述电路交换业务时，在所述第一网络内再次执行所述电路交换业务；
    所述终端再次执行完所述电路交换业务后，确定所述定时器超时时，返回不支持所述电路交换业务的第二网络。
  10. 如权利要求9所述的方法，其特征在于，所述终端启动所述定时器之前，还包括：
    所述终端确定所述终端的类型符合预设类型；或，
    所述终端确定所述第二网络不支持分组交换语音业务和补充业务中的至 少一种；或，
    所述终端确定所述电路交换业务的业务类型为补充业务。
  11. 如权利要求9或10所述的方法，其特征在于，所述终端在启动所述定时器之前，还包括：
    所述终端确定预设延迟时长。
  12. 如权利要求9至11任一项所述的方法，其特征在于，所述终端启动定时器，包括：
    所述终端根据收到的携带延迟指示的消息启动所述定时器，所述延迟指示用于指示所述终端延迟返回所述第二网络。
  13. 如权利要求12所述的方法，其特征在于，所述延迟指示中包括预设延迟时长。
  14. 如权利要求9-13任一所述的方法，其特征在于，所述终端再次执行所述电路交换业务之前，还包括：
    所述终端向移动交换中心服务器发送电路交换业务请求消息，所述电路交换业务请求消息中携带电路交换回落指示。
  15. 一种终端，其特征在于，包括：
    处理单元，用于在支持电路交换业务的第一网络内执行所述电路交换业务；
    启动单元，用于在所述处理单元在所述第一网络内执行完一次所述电路交换业务后，启动定时器；
    确定单元，用于在所述启动单元启动所述定时器后确定在所述定时器超时前是否需要再次执行所述电路交换业务；
    触发单元，用于所述确定单元确定在所述定时器超时前需要再次执行所述电路交换业务时，停止所述定时器，触发所述处理单元在所述第一网络内再次执行所述电路交换业务；
    重置单元，用于在所述处理单元再次执行完所述电路交换业务后，重置所述定时器；
    返回单元，用于在确定满足预设条件时，返回不支持电路交换业务的第二网络。
  16. 如权利要求15所述的终端，其特征在于，还包括：记录单元，
    所述记录单元用于在所述确定单元确定在所述定时器超时前需要再次执行所述电路交换业务之后，在所述处理单元再次执行所述电路交换业务之前，记录一次延迟次数；
    或者
    所述记录单元用于在所述处理单元再次执行完所述电路交换业务后，所述返回单元返回不支持所述电路交换业务的第二网络之前，记录一次延迟次数。
  17. 如权利要求15或16所述的终端，其特征在于，所述预设条件包括以下至少一种：记录的延迟次数达到预设延迟次数、所述定时器所记录的时长达到预设延迟时长；
    其中，所述预设延迟次数是指所述终端在执行完一次所述电路交换业务后，并在返回所述第二网络前，在所述第一网络内允许执行的所述电路交换业务的次数。
  18. 如权利要求15-17任一项所述的终端，其特征在于，所述确定单元在所述启动单元启动所述定时器之前，还用于：
    确定所述终端的类型符合预设类型；或，
    确定所述第二网络不支持分组交换语音业务和补充业务中的至少一种；或，
    确定所述电路交换业务的业务类型为补充业务。
  19. 如权利要求17或18所述的终端，其特征在于，所述确定单元在所述启动单元启动所述定时器之前，还用于：
    确定所述预设延迟时长和所述预设延迟次数中的至少一种。
  20. 如权利要求15-19任一项所述的终端，其特征在于，所述启动单元具体用于：
    在所述处理单元在所述第一网络内执行完一次所述电路交换业务后根据收到的携带延迟指示的消息启动所述定时器，所述延迟指示用于指示所述终端延迟返回所述第二网络。
  21. 如权利要求20所述的终端，其特征在于，所述延迟指示中包括预设延迟时长和预设延迟次数中的一种或者任意组合。
  22. 如权利要求15-21任一项所述的终端，其特征在于，还包括：发送单元，所述发送单元用于向移动交换中心服务器发送电路交换业务请求消息，所述电路交换业务请求消息中携带电路交换回落指示。
  23. 一种终端，其特征在于，包括：
    处理单元，用于在支持电路交换业务的第一网络内执行完一次所述电路交换业务；
    启动单元，用于在所述处理单元在所述第一网络内执行完所述电路交换业务后，启动定时器；
    确定单元，用于在所述启动单元启动所述定时器后，确定在所述定时器超时前是否需要再次执行所述电路交换业务；
    触发单元，用于在所述确定单元确定在所述定时器超时前需要再次执行所述电路交换业务时，触发所述处理单元在所述第一网络内再次执行所述电路交换业务；
    返回单元，用于在确定所述定时器超时时，返回不支持所述电路交换业务的第二网络。
  24. 如权利要求23所述的终端，其特征在于，所述确定单元还用于：
    确定所述终端的类型符合预设类型；或，
    确定所述第二网络不支持分组交换语音业务和补充业务中的至少一种；或，
    确定所述电路交换业务的业务类型为补充业务。
  25. 如权利要求23或24所述的终端，其特征在于，所述确定单元还用于：
    确定预设延迟时长。
  26. 如权利要求23-25任一项所述的终端，其特征在于，所述启动单元具体用于：
    在所述处理单元在所述第一网络内执行完所述电路交换业务后，根据收到的携带延迟指示的消息启动所述定时器，所述延迟指示用于指示所述终端延迟返回所述第二网络。
  27. 如权利要求26所述的终端，其特征在于，所述延迟指示中包括预设延迟时长。
  28. 如权利要求23-27任一所述的终端，其特征在于，还包括：发送单元，所述发送单元用于向移动交换中心服务器发送电路交换业务请求消息，所述电路交换业务请求消息中携带电路交换回落指示。
  29. 一种终端，其特征在于，包括收发器、通信总线、存储器及处理器，其中：
    所述通信总线，用于所述处理器、所述收发器及所述存储器之间的连接通信；
    所述收发器，用于所述终端与外部的通信；
    所述存储器，用于存储程序代码；
    所述处理器，用于调用所述存储器中存储的程序代码，并执行如权利要求1-8任一项所述的方法。
  30. 一种终端，其特征在于，包括收发器、通信总线、存储器及处理器，其中：
    所述通信总线，用于所述处理器、所述收发器及所述存储器之间的连接通信；
    所述收发器，用于所述终端与外部的通信；
    所述存储器，用于存储程序代码；
    所述处理器，用于调用所述存储器中存储的程序代码，并执行如权利要求9-14任一项所述的方法。
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CN201480037487.9A CN105637931B (zh) 2014-09-25 2014-09-25 一种处理电路交换业务的方法及终端
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