WO2015000121A1 - 一种呼叫处理的方法、设备和移动性管理实体 - Google Patents

一种呼叫处理的方法、设备和移动性管理实体 Download PDF

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Publication number
WO2015000121A1
WO2015000121A1 PCT/CN2013/078614 CN2013078614W WO2015000121A1 WO 2015000121 A1 WO2015000121 A1 WO 2015000121A1 CN 2013078614 W CN2013078614 W CN 2013078614W WO 2015000121 A1 WO2015000121 A1 WO 2015000121A1
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WO
WIPO (PCT)
Prior art keywords
terminal
circuit domain
mme
domain paging
request
Prior art date
Application number
PCT/CN2013/078614
Other languages
English (en)
French (fr)
Inventor
李章原
吴仲霖
席国宝
秦存秀
Original Assignee
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/CN2013/078614 priority Critical patent/WO2015000121A1/zh
Priority to CN201380001227.1A priority patent/CN104488323B/zh
Publication of WO2015000121A1 publication Critical patent/WO2015000121A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/10Connection setup
    • H04W76/15Setup of multiple wireless link connections
    • H04W76/16Involving different core network technologies, e.g. a packet-switched [PS] bearer in combination with a circuit-switched [CS] bearer
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0011Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0022Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W68/00User notification, e.g. alerting and paging, for incoming communication, change of service or the like

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to a circuit domain-based call processing method, device, and mobility management entity. Background technique
  • the voice service based on CSFB (Circuit Switched Fallback) technology is a voice call using the existing GERAN/UTRAN network without introducing IMS (IP Multimedia Subsystem). Program.
  • the EPS (Evolved Packet System) network indicates that the user terminal falls back to the target circuit domain network to initiate a voice call.
  • CS Fallback implements voice dropback by reusing the Gs interface, that is, an SGs interface exists between the MME (Mobility Management Entity) and the MSC (Mobile Switching Center), and the SGs
  • the function of the interface is similar to the function of the Gs interface between the SGSN (Serving GPRS Support Node) and the MSC.
  • the MME attached to the calling terminal indicates that the eNodeB currently accessed by the calling terminal service drops the calling terminal to the target circuit domain network, and the eNodeB The calling terminal is dropped back to the target circuit domain network according to the capability of the calling terminal, and the calling terminal initiates a calling voice service in the target circuit domain network.
  • the MSC notifies the MME attached to the terminal that the called service exists, and the MME attached by the terminal instructs the eNodeB currently accessed by the terminal service to drop the terminal back to the target circuit domain network, and the eNodeB is based on the terminal.
  • the ability to drop the terminal back into the target circuit domain network the terminal establishes a circuit domain connection in the target circuit domain network, and completes the voice call service with the calling terminal.
  • the MME attached by the terminal not only sends a response message to the MSC, but also sends a circuit domain fallback message to the terminal, waiting for the response message of the circuit domain fallback message of the terminal, and when the terminal enters the signal dead zone
  • the response message of the circuit domain fallback message cannot be replied to the MME in time, or before the terminal responds to the MOS in response to the response message of the fallback message in the circuit domain
  • the eNodeB accessed by the terminal releases the S1 link with the terminal without the data transmission, so that the UE is in the In the idle state, the MME fails to receive the response message of the circuit domain fallback message replied by the terminal, resulting in the waiting state and causing the call to fail.
  • the MSC forwards to the Iu/A interface. Waiting for the response of the terminal.
  • the terminal is abnormal, the abnormal information cannot be obtained in time. It is always in the forwarding state, and new voice services cannot be initiated in time, resulting in a low success rate of voice calls.
  • the embodiments of the present invention provide a call processing method, a device, and a mobility management entity, which are used to solve the problem that a voice call success rate is low when an abnormality occurs in a terminal existing in the existing CSFB technology.
  • a call processing method including:
  • the mobility management entity MME receives a first circuit domain paging request sent by the mobile switching center MSC to indicate that the terminal falls back to the circuit domain;
  • the MME Determining, by the MME, that the terminal is in a connected state, and according to the first circuit domain paging request, the MME sends a circuit domain paging notification to the terminal;
  • the MME Determining, by the MME, that the terminal does not normally respond to the circuit domain paging notification;
  • the MME changes the state of the terminal to an idle state by communicating with the evolved base station eNodeB;
  • the MME sends a second circuit domain paging request to the terminal according to the first circuit domain paging request.
  • the determining, by the MME, that the terminal does not normally respond to the circuit domain paging notification includes:
  • the determining, by the MME, that the terminal does not normally respond to the circuit domain paging notification includes:
  • the MME determines that the terminal does not normally respond to the circuit, according to the first time period after the sending of the circuit domain paging notification Domain paging notification.
  • the MME communicates with the evolved base station eNodeB
  • the state of the terminal changes to an idle state, including:
  • the MME sends a connection context release command of the terminal to the eNodeB; the MME receives a connection context complete message of the terminal sent by the eNodeB; and the MME changes the state of the terminal to an idle state.
  • the fourth possible implementation includes:
  • the MME sends a paging failure message to the MSC according to the response message that the terminal does not receive the paging request of the second circuit domain after receiving the second circuit domain paging request. .
  • the fifth possible implementation manner further includes:
  • the MME sends an indication message to the eNodeB to indicate that the terminal performs circuit domain fallback.
  • the sixth possible implementation manner further includes:
  • the MME sends a paging failure message to the MSC.
  • the MME determines that the terminal is in a connected state, and includes:
  • the MME queries the status of the terminal, and determines that the terminal is in a connected state according to the query result.
  • a mobility management entity MME including: a transceiver unit, configured to receive a first circuit domain paging request sent by the mobile switching center MSC to indicate that the terminal falls back to the circuit domain;
  • a processing unit configured to determine, after the receiving unit receives the first circuit domain paging request, that the terminal is in a connected state
  • the transceiver unit is further configured to send, according to the first circuit domain paging request received by the receiving unit, the processing unit, that the terminal is in a connected state, and send a circuit domain paging notification to the terminal;
  • the transceiver unit is further configured to communicate with an evolved base station eNodeB;
  • the processing unit is further configured to: communicate with the eNodeB by the transceiver unit to change a state of the terminal to an idle state;
  • the transceiver unit is further configured to: according to the first circuit domain paging request circuit domain paging request received by the transceiver unit.
  • the processing unit is configured to not receive the first time period after the sending, by the transceiver unit, the circuit domain paging notification Determining, by the terminal, a response message to the circuit domain paging notification, determining that the terminal does not normally respond to the circuit domain paging notification.
  • the transceiver unit is further configured to receive, by using the eNodeB, a first time period after sending the circuit domain paging notification a connection context release request of the terminal;
  • the processing unit is configured to determine, according to the connection context release request received by the transceiver unit, that the terminal does not normally respond to the circuit domain paging notification.
  • the transceiver unit is configured to send to the eNodeB Sending a connection context release command of the terminal;
  • the transceiver unit is configured to receive a connection context complete message of the terminal sent by the eNodeB;
  • the processing unit is configured to change a state of the terminal to an idle state.
  • the transceiver unit is configured to not receive the terminal pair according to the second time period after the sending the second circuit domain paging request
  • the response message of the second circuit domain paging request sends a paging failure message to the MSC.
  • the transceiver unit is configured to receive, by the terminal, the terminal in a second time period after sending the second circuit domain paging request. a response message of the two circuit domain paging request;
  • the transceiver unit is configured to send, to the eNodeB, an indication message for indicating that the terminal performs circuit domain fallback.
  • the sixth possible implementation manner further includes:
  • the transceiver unit is configured to receive, by the terminal, a rejection response message of the second circuit domain paging request in a second time period after the sending the second circuit domain paging request;
  • the transceiver unit is configured to send a paging failure message to the MSC.
  • the processing unit is configured to query a status of the terminal, and determine, according to the query result, that the terminal is in a connected state.
  • an apparatus for call processing including: a processor and a transceiver, wherein
  • the transceiver is configured to receive a first circuit domain paging request sent by the mobile switching center MSC to indicate that the terminal falls back to the circuit domain;
  • the processor configured to determine, after the transceiver receives the first circuit domain paging request, that the terminal is in a connected state
  • the transceiver is further configured to send, according to the first circuit domain paging request received by the transceiver, the processor, that the terminal is in a connected state, and send a circuit domain paging notification to the terminal;
  • the transceiver is further configured to communicate with an evolved base station eNodeB;
  • the processor is further configured to communicate with the eNodeB by using the transceiver to change a state of the terminal to an idle state;
  • the transceiver is further configured to send, according to the first circuit domain paging request received by the transceiver, the processor to change a state of the terminal to an idle state, and send a second circuit domain search to the terminal. Call request.
  • the processor is configured to not receive the first time period after the circuit domain paging notification is sent by the transceiver Determining, by the terminal, a response message to the circuit domain paging notification, determining that the terminal does not normally respond to the circuit domain paging notification.
  • the transceiver is further configured to receive, by using the eNodeB, a first time period after sending the circuit domain paging notification. a connection context release request of the terminal;
  • the processor is configured to determine, according to the connection context release request received by the transceiver, that the terminal does not normally respond to the circuit domain paging notification.
  • the transceiver is configured to be used in the eNodeB Sending a connection context release command of the terminal;
  • the transceiver is configured to receive a connection context completion message of the terminal sent by the eNodeB;
  • the processor is configured to change a state of the terminal to an idle state.
  • the transceiver is configured to not receive the terminal pair according to a second time period after sending the second circuit domain paging request The response message of the second circuit domain paging request sends a paging failure message to the MSC.
  • the transceiver is configured to receive, by the terminal, the terminal in a second time period after sending the second circuit domain paging request. a response message of the two circuit domain paging request;
  • the transceiver is configured to send, to the eNodeB, an indication message for indicating that the terminal performs circuit domain fallback.
  • the sixth possible implementation manner further includes:
  • the transceiver is configured to receive a reject response message of the terminal to the second circuit domain paging request in a second time period after the sending the second circuit domain paging request;
  • the transceiver is configured to send a paging failure message to the MSC.
  • the processor is configured to query a status of the terminal, and determine, according to the query result, that the terminal is in a connected state.
  • the mobility management entity MME determines that the terminal does not normally respond to the paging notification of the circuit domain, the paging operation of the terminal is additionally increased, and the success rate of the voice call of the terminal can be improved.
  • FIG. 1 is a schematic flowchart of a method for call processing according to Embodiment 1 of the present invention
  • FIG. 2 is a schematic flowchart of a method for call processing according to Embodiment 2 of the present invention
  • FIG. 3 is a schematic flowchart of a method for call processing according to Embodiment 3 of the present invention
  • 4 is a schematic flowchart of a call processing method according to Embodiment 4 of the present invention
  • FIG. 5 is a schematic structural diagram of a mobility management entity MME device according to Embodiment 5 of the present invention
  • FIG. 6 is a schematic diagram of Embodiment 6 of the present invention
  • an embodiment of the present invention provides a method, a device, and a mobility management entity for call processing, where an additional paging to a terminal is additionally added when the terminal does not normally respond to the circuit domain paging notification. Operation can improve the success rate of the terminal voice call.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • FIG. 1 it is a schematic flowchart of a method for call processing according to Embodiment 1 of the present invention, where the method includes:
  • Step 101 The mobility management entity MME receives a first circuit domain paging request sent by the mobile switching center MSC to indicate that the terminal falls back to the circuit domain.
  • the MSC When the MSC receives the voice call request that carries the terminal identifier, it determines that the terminal corresponding to the terminal identifier is in an Attached state, and determines the MME to which the terminal is attached through the existing SGs interface.
  • the MSC sends a first circuit domain paging request to the determined MME for instructing the terminal to fall back to the circuit domain.
  • the first circuit domain paging request may be a CS Paging Request message.
  • Step 102 The MME determines that the terminal is in a connected state, and according to the first circuit domain paging request, the MME sends a circuit domain paging notification to the terminal.
  • the MME may query the status of the terminal, and determine, according to the query result, that the terminal is in a connected state.
  • the MME queries, according to the terminal identifier included in the paging request of the first circuit domain, the status information of the terminal corresponding to the current terminal identifier;
  • the MME may send a CS Paging Notification to the terminal on the existing signaling link when determining that the terminal is in the connected state, or may be a circuit domain service notification (CS Service Notification). ).
  • the MME may send a call response message to the MSC, and notify the MSC that the circuit domain paging notification message has been sent to the terminal, and is waiting for the paging response message of the terminal.
  • the call response message may be a Service Request message.
  • the MSC may forward to the Iu/A interface to wait for the call response of the terminal.
  • Step 103 The MME determines that the terminal does not normally respond to the circuit domain paging notification.
  • the manner in which the MME determines that the terminal does not normally respond to the circuit domain paging notification includes, but is not limited to, the following manner:
  • the first timer may be started, and the MME determines whether the first timer is received in the time interval of the first time duration.
  • the circuit domain paging notification response message returned by the terminal.
  • the setting of the first duration may be a period from when the first timer is turned on, and the timing value reaches the end of the set value.
  • the first duration of the setting may be set to 8 seconds, and may be set to other time lengths as needed, which is not limited herein.
  • the MME After transmitting the circuit domain paging notification to the terminal, the MME is in a state of waiting to receive the terminal to return the circuit domain paging notification response message.
  • the connection state of the terminal may be changed at any time, that is, by a normal connection state.
  • connection abnormal state for example: the terminal enters the blind area of the communication network, cannot communicate with the MME, etc.
  • connection idle state ie, the terminal and the currently accessed evolved base station
  • the MME will continue to wait for the terminal to return the circuit domain paging notification response message, causing the MME to wait for the circuit domain paging notification response message to time out.
  • the MME After sending the circuit domain paging notification to the terminal, the MME immediately starts the first timer, and monitors whether the terminal returns in the time interval when the first timer reaches the set first time duration.
  • the circuit domain paging notification response message is used to determine the connection status of the terminal in the communication network in real time.
  • connection context release request of the terminal may be a UE Context Release Request message.
  • the MME After the MME sends the circuit domain paging notification to the terminal, the first timer is started, and the MME determines whether the eNodeB is received in the time interval when the first timer reaches the set first duration.
  • the connection context release request of the terminal that is sent.
  • the setting of the first duration refers to the period from when the first timer is turned on, and the timing value reaches the end of the set value.
  • the first duration of the setting may be set to 8 seconds, and may be set to other time lengths as needed, which is not limited herein.
  • the MME When the MME receives the connection context release request of the terminal sent by the eNodeB in the time interval that the first timer reaches the set first duration, it is determined that the terminal does not normally respond to the circuit domain. Paging notice.
  • the MME when the first timer is started, the MME is set to wait to receive the response from the terminal.
  • the MME determines that the terminal does not normally respond to the circuit domain paging notification when at least one of the following occurs within a first time period after the circuit domain paging notification is sent: Not receiving the response message of the terminal to the circuit domain paging notification after the first time period after the circuit domain paging notification;
  • the MME receives the connection context release request of the terminal sent by the eNodeB within a first time period after the circuit domain paging notification is sent.
  • the first time period may be preset, or may be controlled by a timer, which is not limited herein.
  • the terminal may respond to the circuit domain paging notification as an Extend Service Request message.
  • the state of the terminal is changed to an idle state by communicating with the evolved base station eNodeB.
  • the manner in which the MME changes the state of the terminal to the idle state by communicating with the evolved base station eNodeB includes but is not limited to the following manners:
  • the MME sends a connection context release command of the terminal to the eNodeB.
  • the connection context release command of the terminal may be a terminal context release command (UE).
  • the MME receives a connection context complete message of the terminal sent by the eNodeB.
  • the eNodeB when receiving the connection context release command of the terminal, releases an S1 connection between the eNodeB and the terminal, and sends a connection context complete message of the terminal to the MME.
  • connection context complete message of the terminal may be completed for the terminal context release (UE Context Release Complete ) message.
  • terminal context release UE Context Release Complete
  • the MME changes the state of the terminal to an idle state.
  • Step 105 The MME sends a second circuit domain paging request to the terminal according to the first circuit domain paging request.
  • the MME changes the state of the terminal to an idle state by communicating with the evolved base station eNodeB, and cannot receive the circuit domain paging notification response message returned by the terminal, according to the A circuit domain paging request initiates a second circuit domain paging request to the terminal in time, so that an additional paging is added, which increases the success rate of the voice call between the terminal and the terminal.
  • Step 106 The MME performs a subsequent operation according to the response of the terminal to the paging request of the second circuit domain.
  • the MME receives an accept response message from the terminal to the second circuit domain paging request within a set duration, the MME directions The eNodeB sends an indication message for indicating that the terminal performs circuit domain fallback.
  • the indication message indicates that the terminal falls back to the target network, and establishes a circuit domain connection to complete the voice call.
  • the accept response message may be an Extended Service Request message
  • the MME sends an Initial including the UE Radio Capabilities parameter and the CS Fallback Indicator parameter to the eNodeB when determining that the terminal responds to a call from the CS domain.
  • the Context Setup Request message instructs the eNodeB to drop the terminal back to the target circuit domain network, and receives an Initial Context Setup Request message returned by the eNodeB.
  • a paging operation on the terminal can improve the success rate of the terminal voice call.
  • the MME sends a paging failure message to the mobile switching center MSC to which the terminal belongs, if the response message of the terminal to the second circuit domain paging request is not received within the set duration;
  • the MSC causes it to pause for forward operation.
  • the paging failure message sent to the MSC may include a failure reason that the UE is unreachable (UE unreachable).
  • the MME notifies the MSC to which the terminal belongs, so that the MSC can pause the forward waiting operation, thereby saving network resources.
  • the MME receives the reject response message of the second circuit domain paging request by the terminal within a set duration, and the MME sends a paging failure message to the MSC to which the terminal belongs.
  • the reason for the failure in the paging failure message may be that the user rejects the CS call.
  • the reject response message may be an extended service request message
  • the extended service request message received by the MME carries a reject response command (for example, a Paging Reject command).
  • the mobility management entity MME can additionally increase the paging operation of the terminal when the terminal does not normally respond to the paging notification of the circuit domain, thereby improving the success rate of the terminal voice call.
  • the mobile switching center MSC is notified in time to suspend the forward waiting operation of the MSC, thereby saving network resources.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • FIG. 2 is a schematic flowchart diagram of a method for call processing according to Embodiment 2 of the present invention.
  • a second embodiment of the present invention is a detailed description of the first embodiment of the present invention, where the method includes:
  • Step 201 The mobility management entity MME receives a first circuit domain paging request sent by the mobile switching center MSC to indicate that the terminal falls back to the circuit domain.
  • the MSC When the MSC receives the voice call request that carries the terminal identifier, it determines the Attached state of the terminal corresponding to the terminal identifier, and determines the MME to which the terminal is attached through the existing SGs interface.
  • the MSC sends a first circuit domain paging request for instructing the terminal to fall back to the circuit domain to the determined MME, and notifies the MME that there is a call indication of the terminal corresponding to the terminal identifier.
  • the first circuit domain paging request may be call indication information, and may also be a CS Paging Request message.
  • the MME queries the network state where the terminal is currently located, whether it is a connected state or an idle state.
  • the MME when receiving the first circuit domain paging request that includes the terminal identifier sent by the mobile switching center, queries the current state information of the terminal corresponding to the terminal identifier;
  • Step 202 The MME determines that the terminal is in a connected state, and according to the first circuit domain paging request, the MME sends a circuit domain paging notification to the terminal.
  • step 202 when the MME determines that the terminal is in the connected state, according to the first circuit domain paging request, the MME may send a circuit domain paging notification to the terminal on the existing signaling link, It can be a circuit domain service notification.
  • the circuit domain paging notification may be a CS Paging Notification message
  • the circuit domain service notification may be a CS Service Notification message.
  • the MME may send a call response message to the MSC, and notify the MSC that the circuit domain paging notification message has been sent to the terminal, and is waiting for the paging response message of the terminal.
  • the call response message may be a Service Request message.
  • the MSC may forward to the Iu/A interface to wait for the call response of the terminal.
  • Step 203 When the MME sends a circuit domain paging notification to the terminal, the first timer is started.
  • Step 204 The MME determines whether the circuit domain paging notification response message returned by the terminal is received in the time interval when the first timer is timed to set the first duration. If not, the step is performed. 205; If yes, step 213 is performed.
  • the setting the first duration may refer to starting the timer from the first timer, and the number of timings The value reaches the end of the set value.
  • the first duration of the setting may be set to 8 seconds, and may be set to other time lengths as needed, which is not limited herein.
  • the MME After transmitting the circuit domain paging notification to the terminal, the MME is in a state of waiting to receive the terminal to return the circuit domain paging notification response message.
  • the connection state of the terminal may be changed at any time, that is, by a normal connection state. Converting to a connection abnormal state (for example: the terminal enters the blind area of the communication network, cannot communicate with the MME, etc.), or is converted from the normal connection state to the connection idle state (ie, the terminal and the currently accessed evolved base station) There is no data transmission between the eNodeBs, etc., so that the MME will continue to wait for the terminal to return the circuit domain paging notification response message, causing the MME to wait for the circuit domain paging notification response message to time out.
  • a connection abnormal state for example: the terminal enters the blind area of the communication network, cannot communicate with the MME, etc.
  • connection idle state ie, the terminal and the currently accessed evolved base station
  • the MME After sending the circuit domain paging notification to the terminal, the MME immediately starts the first timer, and monitors whether the terminal returns in the time interval when the first timer reaches the set first time duration.
  • the circuit domain paging notification response message is used to determine the connection status of the terminal in the communication network in real time.
  • Step 205 The MME determines that the terminal is not normal according to the circuit domain paging notification response message returned by the terminal in the time interval when the first timer reaches the set first duration. Responding to the circuit domain paging notification. The state of the terminal is changed to an idle state by communicating with the evolved base station eNodeB.
  • step 206 first, the MME sends a connection context release command of the terminal to the eNodeB.
  • connection context release command of the terminal may be a UE Context Release Command message.
  • the MME receives a connection context complete message of the terminal sent by the eNodeB.
  • connection context release command of the terminal When the eNodeB receives the connection context release command of the terminal, releasing the An SI connection between the eNodeB and the terminal, and sending a connection context complete message of the terminal to the MME.
  • connection context complete message of the terminal may be sent by the UE Context Release Complete message.
  • the MME changes the state of the terminal to an idle state.
  • Step 207 The MME sends a second circuit domain paging request to the terminal according to the first circuit domain paging request.
  • the MME changes the state of the terminal to an idle state by communicating with the evolved base station eNodeB, and cannot receive the circuit domain paging notification response message returned by the terminal, according to the A circuit domain paging request initiates a second circuit domain paging request to the terminal in time, so that an additional paging is added, which increases the success rate of the voice call between the terminal and the terminal.
  • Step 208 The MME determines whether a response message of the terminal to the second circuit domain paging request is received in a second time period after the second circuit domain paging request is sent, and if received, Step 209 211 is performed; otherwise, step 212 is performed.
  • Step 209 The MME receives a response message from the terminal to the second circuit domain paging request within a set duration, and determines whether the response message of the second circuit domain paging request includes a rejection from the CS. If the instruction of the call of the domain includes the reject command, step 210 is performed; if the reject command is not included, step 211 is performed.
  • the response message of the second circuit domain paging request may be an Extended Service Request message.
  • the terminal determines, according to the received core domain type carried in the second circuit domain paging request, a circuit domain, and determines whether to respond to the call from the CS domain, and sends a response message of the second circuit domain paging request to the terminal The MME.
  • Step 210 When the response message of the second circuit domain paging request sent by the terminal is received by the MME, the MME sends a reject response message (for example: SGsAP-PAGING-REJECT message) To the MSC, the CS domain call operation is ended.
  • the paging failure message may include a failure reason for the user to reject the CS call.
  • the MSC pauses the forward waiting operation, and forwards to the Iu/A interface to initiate a voice call service to the terminal.
  • Step 211 When the response message of the second circuit domain paging request sent by the terminal is not included in the MME, the MME determines that the terminal responds to a call from the CS domain. The eNodeB sends an indication message for indicating that the terminal performs circuit domain fallback.
  • the MME when determining that the terminal responds to a call from the CS domain, sends, to the eNodeB, a UE Radio Capabilities parameter including a terminal radio transmission capability and a CS Fallback Indicator parameter.
  • the initial context setup request Initial Context Setup Request message instructs the eNodeB to drop the terminal back to the target circuit domain network, and receives an initial context setup reply Initial Context Setup Response message returned by the eNodeB.
  • Step 212 The MME does not receive the response message of the terminal to the second circuit domain paging request within the set duration, and sends a paging failure message to the MSC.
  • the MME does not receive the response message of the terminal to the second circuit domain paging request within the set duration, and determines that the terminal is in an abnormal connection state and cannot respond to this time. Paging, sending a paging failure message to the mobile switching center MSC to which the terminal belongs, and notifying the MSC to suspend the forward waiting operation.
  • Step 213 The MME sends the circuit domain paging notification response message returned by the terminal to the eNodeB according to the time interval that the first timer is timed to reach the set first duration. An indication message indicating that the terminal is subjected to circuit domain fallback.
  • step 213 before the MME sends an indication message for instructing the terminal to perform circuit domain fallback to the eNodeB, it may further determine whether the circuit domain paging notification response message includes a rejection from the CS.
  • the command of the call of the domain, the subsequent execution is the same as the steps 209 to 212, and is not mentioned here.
  • the mobility management entity MME determines that the terminal is not positive.
  • the second circuit domain paging request is sent to the terminal, and the paging operation for the terminal is additionally added, which can improve the success rate of the terminal voice call.
  • the mobile switching center MSC is notified in time to suspend the forward waiting operation of the MSC, thereby saving network resources.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • Embodiment 3 of the present invention is an invention under the same concept as Embodiment 1 of the present invention and Embodiment 2 of the present invention, Methods include:
  • Step 301 The mobility management entity MME receives a first circuit domain paging request sent by the mobile switching center MSC to indicate that the terminal falls back to the circuit domain.
  • the MSC When the MSC receives the voice call request that carries the terminal identifier, it determines the Attached state of the terminal corresponding to the terminal identifier, and determines the MME to which the terminal is attached through the existing SGs interface.
  • the MSC sends a first circuit domain paging request to the determined MME for instructing the terminal to fall back to the circuit domain.
  • the first circuit domain paging request may be a CS Paging Request message, and may also be an SGs AP-PAGING-REQUEST message.
  • the MME queries the status of the terminal when receiving the paging request of the first circuit domain, and determines that the terminal is in the connected state according to the query result.
  • the MME when receiving the first circuit domain paging request that includes the terminal identifier sent by the mobile switching center, queries the current state information of the terminal corresponding to the terminal identifier.
  • Step 302 The MME determines that the terminal is in a connected state, and according to the paging request of the first circuit domain, the MME sends a circuit domain paging notification to the terminal.
  • the MME may send a CS Paging Notification to the terminal on an existing signaling link, It can be a CS Service Notification.
  • the MME may send a call response message to the MSC, and notify the MSC that the circuit domain paging notification message has been sent to the terminal, and is waiting for the paging response message of the terminal.
  • the call response message may be a service request Service Request message.
  • the MSC may forward to the Iu/A interface to wait for the call response of the terminal.
  • Step 303 The MME receives the connection context release request of the terminal sent by the eNodeB, and determines that the terminal does not respond normally according to the first time period after the sending of the circuit domain paging notification.
  • the circuit domain paging notification is not accessed by the eNodeB.
  • connection context release request of the terminal may be a UE Context Release Request message.
  • the first timer is started, and it is determined whether the first timer is timed to reach the set time duration.
  • a connection context release request of the terminal sent by the eNodeB is notified.
  • the setting of the first duration may be a period from when the first timer is turned on, and the timing value reaches the end of the set value.
  • the first duration of the setting may be set to 8 seconds, and may be set to other time lengths as needed, which is not limited herein.
  • the length value of the first time period after the sending of the circuit domain paging notification may be the same as the calculated first time length, or may be different, and is not limited herein.
  • the MME When the MME receives the connection context release request of the terminal sent by the eNodeB in the time interval that the first timer reaches the set first duration, it is determined that the terminal does not normally respond to the circuit domain. Paging notice.
  • the state of the terminal is changed to an idle state by communicating with the evolved base station eNodeB.
  • the manner in which the MME changes the state of the terminal to the idle state by communicating with the evolved base station eNodeB includes but is not limited to the following manners:
  • the MME sends a connection context release command of the terminal to the eNodeB.
  • the connection context release command of the terminal may be a UE Context Release
  • the MME receives a connection context complete message of the terminal sent by the eNodeB.
  • the eNodeB when receiving the connection context release command of the terminal, releases the S1 connection between the eNodeB and the terminal, and sends a connection context complete message of the terminal to the MME.
  • connection context complete message of the terminal may be a UE Context Release Complete message.
  • the MME changes the state of the terminal to an idle state.
  • Step 305 The MME sends a second circuit domain paging request to the terminal according to the first circuit domain paging request.
  • the MME changes the state of the terminal to an idle state by communicating with the evolved base station eNodeB, and cannot receive the circuit domain paging notification response message returned by the terminal, according to the A circuit domain paging request initiates a second circuit domain paging request to the terminal in time, so that an additional paging is added, which increases the success rate of the voice call between the terminal and the terminal.
  • Step 306 The MME determines whether a response message of the terminal to the second circuit domain paging request is received after the second time period after the second circuit domain paging request is sent, and if yes, Go to step 307; if no, go to step 30.
  • the MME when the MME initiates a second circuit domain paging request to the terminal, the MME starts a second timer, and determines whether the time interval is reached when the second timer reaches the set second time interval.
  • the response message of the second circuit domain paging request returned by the terminal if received, performs step 307 or step 30; otherwise, step 308 is performed.
  • the setting of the second duration may refer to a period of time from when the second timer is turned on, and the count value reaches the end of the set value, and the second duration is less than the first duration.
  • the first duration is 8 seconds
  • the second duration is 6 seconds, which is not limited herein.
  • the second time period after the sending of the second circuit domain paging request may be implemented by using a second timer, and may be implemented by other methods, which is not limited herein.
  • step 306 after the MME initiates the second paging to the terminal, it needs to wait for a period of time to receive a response message of the terminal (for example, an Extend Service Request message), and start the second timing.
  • the MME may detect the time of receiving the response message of the terminal, avoiding the timeout waiting, and determining whether the terminal is in an abnormal state in time.
  • Step 307 The MME receives an accept response message from the terminal to the second circuit domain paging request in a second time period after sending the second circuit domain paging request, and sends the message to the eNodeB. And an indication message indicating that the terminal is subjected to circuit domain fallback.
  • the indication message indicates that the terminal falls back to the target network, and establishes a circuit domain connection to complete the voice call.
  • the accept response message may be an Extended Service Request message
  • the MME sends an Initial including the UE Radio Capabilities parameter and the CS Fallback Indicator parameter to the eNodeB when determining that the terminal responds to a call from the CS domain.
  • the Context Setup Request message instructs the eNodeB to drop the terminal back to the target circuit domain network, and receives an Initial Context Setup Request message returned by the eNodeB.
  • a paging operation on the terminal can improve the success rate of the terminal voice call.
  • the MME receives a reject response message of the second circuit domain paging request by the terminal, and the MME sends a paging failure message to the MSC to which the terminal belongs.
  • the reason for the failure in the paging failure message may be that the user rejects the CS call.
  • the reject response message may be an extended service request message
  • the extended service request message received by the MME carries a reject response command (for example, a Paging Reject command).
  • the MME may further determine whether the circuit domain paging notification response message includes an instruction to reject a call from the CS domain, if the reject command is included Then, step 30 is performed; otherwise, step 307 is performed in the same manner as steps 209 to 211 in the second embodiment of the present invention, and details are not described herein.
  • Step 308 The MME does not receive the response message of the terminal to the second circuit domain paging request in the second time period after the second circuit domain paging request is sent, to the terminal to which the terminal belongs.
  • the mobile switching center MSC sends a paging failure message.
  • step 308 the MME does not receive the response message of the second circuit domain paging request returned by the terminal when the second timer reaches the set second duration, to the terminal to which the terminal belongs.
  • the mobile switching center MSC sends a paging failure message.
  • the paging failure message sent to the MSC may include a UE failure condition (UE unreachable).
  • the MSC When receiving the paging failure message sent by the MME, the MSC pauses the forward waiting operation, and forwards to the Iu/A interface to initiate a voice call service to the terminal.
  • the MSC may also re-initiate a voice call service to the terminal.
  • the mobility management entity MME receives a first circuit domain paging request sent by the mobile switching center MSC to indicate that the terminal falls back to the circuit domain, and the MME determines that the terminal is in a connected state, according to The first circuit domain paging request, the MME sends a circuit domain paging notification to the terminal, the MME determines that the terminal does not normally respond to the circuit domain paging notification, and the MME passes the evolved base station eNodeB The communication changes the state of the terminal to an idle state, and the MME sends a second circuit domain to the terminal according to the first circuit domain paging request.
  • the mobile switching center MSC sends a paging failure message to cause the MSC to suspend the forward waiting operation; and receives the terminal to the second within a second time period after transmitting the second circuit domain paging request
  • Receiving a response message of the circuit domain paging request sending an indication message to the eNodeB to indicate that the terminal performs circuit domain fallback, so that the terminal falls back to the target network, implements a voice call, and additionally adds a terminal to the terminal.
  • the call operation not only enables the MSC to suspend the forward waiting operation when the terminal is abnormal, but also saves the network resources; and increases the chance that the terminal is paged, thereby improving the success rate of the terminal voice call.
  • Embodiment 4 is a diagrammatic representation of Embodiment 4:
  • Embodiment 4 of the present invention is a method according to the same inventive concept as Embodiment 1 to Embodiment 3 of the present invention, Methods include:
  • Step 401 The mobile switching center determines the attached state of the terminal corresponding to the terminal identifier when receiving the voice call request that carries the terminal identifier, and determines the MME attached to the terminal by using the existing SGs interface.
  • Step 402 The MSC sends a first circuit domain paging request for instructing the terminal to fall back to the circuit domain to the determined MME.
  • the first circuit domain paging request may be an SGs port paging request SGsAP-PAGING-REQUEST message.
  • Step 403 The MME queries the status of the terminal when receiving the paging request of the first circuit domain, and determines that the terminal is in the connected state according to the query result.
  • the current state of the terminal refers to whether it is in a connected state or in an idle state.
  • the MME when receiving the first circuit domain paging request that is sent by the MSC and including the terminal identifier, queries the current state information of the terminal corresponding to the terminal identifier;
  • the MME determines the current state of the terminal by using signaling transmission information between the terminal and the MME uplink and downlink.
  • the eNodeB is instructed to page the terminal in the air interface resource; if the MME queries that the current state of the terminal is in the connected state, Go to step 404.
  • Step 404 The MME determines that the terminal is in a connected state, and according to the first circuit domain paging request, the MME sends a circuit domain paging notification to the terminal.
  • step 404 when the MME determines that the terminal is in the connected state, according to the first circuit domain paging request, the MME may send a circuit domain paging notification to the terminal on the existing signaling link (CS).
  • Paging Notification which can also be a CS Service Notification.
  • the MME may send a call response message to the MSC, and notify the MSC that the circuit domain paging notification message has been sent to the terminal, and is waiting for the paging response message of the terminal.
  • the call response message may be a Service Request message.
  • the MSC When receiving the call response message sent by the MME, the MSC forwards to the Iu/A interface to wait for the call response of the terminal.
  • Step 405 When the MME sends a circuit domain paging notification to the terminal, the first timer is started.
  • Step 406 The MME determines whether the circuit domain paging notification response message returned by the terminal is received in the time interval when the first timer is timed to set the first duration. If not, the step is performed. 407; If yes, step 414 is performed.
  • the setting of the first duration may be a period from when the first timer is turned on, and the timing value reaches the end of the set value.
  • the first duration of the setting may be set to 8 seconds, and may be set to other lengths as needed, which is not limited herein.
  • the MME is in a state of waiting to receive the terminal to return the circuit domain paging notification response message.
  • Step 407 The MME further determines whether a connection context release request of the terminal sent by the eNodeB is received in a time interval when the first timer reaches a set first duration, and if yes, determining the The terminal does not normally respond to the circuit domain paging notification, and proceeds to step 408; if no, determines that the terminal has an abnormality, and proceeds to step 408.
  • the MME determines that the circuit domain paging notification response message returned by the terminal is not received according to the time interval that the first timer reaches the set first duration.
  • the terminal does not normally respond to the circuit domain paging notification.
  • step 407 when the first timer reaches the set first duration, the MME determines that the response message of the circuit domain paging notification returned by the terminal is not determined, and determines The connection context release request of the terminal sent by the eNodeB is not received, indicating that the current connection state of the terminal is abnormal. Therefore, step 408 is also required to be continued.
  • the state of the terminal is changed to an idle state by communicating with the evolved base station eNodeB.
  • step 408 the manner in which the MME changes the state of the terminal to the idle state by communicating with the evolved base station eNodeB includes but is not limited to the following manners:
  • the MME sends a connection context release command of the terminal to the eNodeB.
  • the connection context release command of the terminal may be a UE Context Release
  • the MME receives a connection context complete message of the terminal sent by the eNodeB.
  • the eNodeB when receiving the connection context release command of the terminal, releases an S1 connection between the eNodeB and the terminal, and sends a connection context complete message of the terminal to the MME.
  • connection context complete message of the terminal may be a UE Context Release Complete message.
  • the MME changes the state of the terminal to an idle state.
  • Step 409 The MME sends a second circuit domain paging request to the terminal according to the first circuit domain paging request.
  • the MME changes the state of the terminal to an idle state by communicating with the evolved base station eNodeB, and cannot receive the circuit domain paging notification response message returned by the terminal, according to the first circuit domain.
  • the paging request initiates a second circuit domain paging request to the terminal in time, so that an additional paging is added, which increases the success rate of the voice call between the terminal and the terminal.
  • Step 410 The MME starts a second timer when initiating a second circuit domain paging request to the terminal.
  • Step 411 The MME determines whether a response message of the second circuit domain paging request returned by the terminal is received in the time interval when the second timer reaches the set second duration, and if received, If step 412 or step 41 is performed, go to step 413.
  • the setting of the second duration may refer to a period of time from when the second timer is turned on, and the count value reaches the end of the set value, and the second duration is less than the first duration.
  • the first duration is 8 seconds
  • the second duration is 6 seconds, which is not limited herein.
  • the MME may detect the time of receiving the response message of the terminal, avoiding the timeout waiting, and determining whether the terminal is in an abnormal state in time.
  • Step 412 The MME receives an accept response message from the terminal to the second circuit domain paging request in a second time period after the second circuit domain paging request is sent, and sends the message to the eNodeB. And an indication message indicating that the terminal is subjected to circuit domain fallback.
  • the indication message indicates that the terminal falls back to the target network, and establishes a circuit domain connection to complete the voice call.
  • the accept response message may be an Extended Service Request message
  • the MME sends an Initial including the UE Radio Capabilities parameter and the CS Fallback Indicator parameter to the eNodeB when determining that the terminal responds to a call from the CS domain.
  • Context Setup The request message instructs the eNodeB to drop the terminal back to the target circuit domain network, and receives an Initial Context Setup Request message returned by the eNodeB.
  • a paging operation on the terminal can improve the success rate of the terminal voice call.
  • Step 4127 When the MME receives a long set to the second terminal rejecting the CS domain paging request response message, the MME to the MSC belongs paging failure message sent by the terminal.
  • the reason for the failure in the paging failure message may be that the user rejects the CS call.
  • the reject response message may be an extended service request message
  • the extended service request message received by the MME carries a reject response command (for example, a Paging Reject command).
  • the MME may further determine whether the circuit domain paging notification response message includes an instruction to reject a call from the CS domain, and if the reject instruction is included, Otherwise, step 412 is performed in the same manner as steps 209 to 211 in the second embodiment of the present invention, and details are not described herein.
  • Step 413 The MME does not receive the response message of the terminal to the second circuit domain paging request in the second time period after the second circuit domain paging request is sent, to the terminal to which the terminal belongs.
  • the mobile switching center MSC sends a paging failure message.
  • the MME does not receive the response message of the second circuit domain paging request returned by the terminal when the second timer timing reaches the set second duration, to the The mobile switching center MSC to which the terminal belongs sends a paging failure message.
  • the paging failure message sent to the MSC may include a UE failure condition (UE unreachable).
  • the MSC When receiving the paging failure message sent by the MME, the MSC pauses the forward waiting operation, and forwards to the Iu/A interface to initiate a voice call service to the terminal.
  • the MSC may also re-initiate a voice call service to the terminal.
  • Step 414 The MME receives the circuit domain paging notification response message returned by the terminal when the first timer reaches a set first duration, and determines whether the terminal responds from the terminal. If the CS domain calls, if it agrees to respond, step 415 is performed; if the response is rejected, the MSC rejects the response call message and ends the CS domain call operation.
  • the circuit domain paging notification response message may be an Extended Service Request message.
  • the terminal determines whether to respond to the voice call of the current CS domain according to the calling terminal identifier carried in the paging request of the first circuit domain.
  • the terminal determines whether to respond to the call from the CS domain according to the Caller Line Identification, and sends a circuit domain paging notification response message to the MME.
  • step 415 When the extended service request message received by the MME carries the consent response information, step 415 is performed; when the extended service request message received by the MME carries the reject response information, the MME sends a reject response message (for example: SGsAP-PAGING-REJECT) Ends the CS domain call operation to the MSC to which the terminal belongs.
  • a reject response message For example: SGsAP-PAGING-REJECT
  • Step 415 The MME, when determining that the terminal responds to the call from the CS domain, instructs the base station currently accessed by the terminal to drop the terminal back to the target circuit domain network, and establish a circuit domain connection to complete the voice call.
  • the MME determines that the terminal responds to the call from the CS domain, the MME sends an Initial Context Setup Request message including the UE Radio Capabilities parameter and the CS Fallback Indicator parameter to the eNodeB, instructing the eNodeB to drop the terminal. Go to the target circuit domain network and receive the Initial Context Setup Request message returned by the eNodeB.
  • the MME does not receive the circuit domain paging notification response message returned by the terminal when the first timer reaches the set first duration, and can timely determine that the current terminal is abnormal.
  • Adding an additional paging operation to the terminal, starting a second timer, and not receiving the second circuit domain paging request returned by the terminal when the second timer timing reaches a set second duration Sending, by the response message, a paging failure message to the mobile switching center MSC to which the terminal belongs, so that the MSC pauses the forward waiting operation; and receiving the second timer when the second timer reaches the set second duration
  • the terminal is caused to fall back to the target network to implement a voice call, and an additional paging operation for the terminal is added, which not only can notify the MSC to suspend the forward waiting operation when the terminal is abnormal,
  • Embodiment 5 is a diagrammatic representation of Embodiment 5:
  • FIG. 5 it is a schematic structural diagram of a mobility management entity MME device according to Embodiment 5 of the present invention
  • Embodiment 5 of the present invention is a device under the same inventive concept as Embodiments 1 to 4 of the present invention.
  • the device comprises: a transceiver unit 11 and a processing unit 12, wherein:
  • the transceiver unit 11 is configured to receive a first circuit domain paging request sent by the mobile switching center MSC to indicate that the terminal falls back to the circuit domain;
  • the processing unit 12 is configured to determine, after the receiving unit receives the first circuit domain paging request, that the terminal is in a connected state;
  • the transceiver unit 11 is further configured to: according to the first circuit domain paging request received by the receiving unit, and the processing unit determining that the terminal is in a connected state, sending a circuit domain paging notification to the terminal;
  • the unit 11 is further configured to communicate with the evolved base station eNodeB;
  • the processing unit 12 is further configured to communicate with the eNodeB by using the transceiver unit to change a state of the terminal to an idle state;
  • the transceiver unit 11 is further configured to send the second circuit domain to the terminal according to the first circuit domain paging request received by the transceiver unit and the processing unit changing the state of the terminal to an idle state. Paging request.
  • the processing unit 12 is configured to: according to the first time period after the sending, by the transceiver unit, the circuit domain paging notification, the response message of the terminal to the circuit domain paging notification is not received, determining The terminal does not normally respond to the circuit domain paging notification.
  • the transceiver unit 11 is further configured to receive a connection context release request of the terminal sent by the eNodeB within a first time period after sending the circuit domain paging notification;
  • the processing unit 12 is configured to determine, according to the connection context release request received by the transceiver unit, that the terminal does not normally respond to the circuit domain paging notification.
  • the transceiver unit 11 is configured to send a connection context release command of the terminal to the eNodeB;
  • the transceiver unit 11 is configured to receive a connection context complete message of the terminal sent by the eNodeB;
  • the processing unit 12 is configured to change a state of the terminal to an idle state.
  • the transceiver unit 12 is configured to: after receiving the second time domain after the second circuit domain paging request, send a response message of the terminal to the second circuit domain paging request, The MSC sends a paging failure message.
  • the sending and receiving unit configured to receive, by the terminal, a reject response message of the second circuit domain paging request in a second time period after the sending the second circuit domain paging request;
  • the transceiver unit is configured to send a paging failure message to the MSC.
  • the transceiver unit 12 is configured to receive, by the terminal, a response message to the second circuit domain paging request in a second time period after the sending the second circuit domain paging request;
  • the transceiver unit 12 is configured to send, to the eNodeB, an indication message for indicating that the terminal performs a circuit domain fallback.
  • the processing unit 12 is configured to query a status of the terminal, and determine, according to the query result, that the terminal is in a connected state.
  • the device in the fifth embodiment of the present invention may be the physical device of the execution entity mobility management entity MME according to the first to fourth embodiments of the present invention, and may also be a logical unit in the mobility management entity. It is a logical component integrated in other devices on the network side, which is not limited here.
  • FIG. 6 is a schematic structural diagram of an apparatus for call processing according to Embodiment 6 of the present invention.
  • Embodiment 6 of the present invention is an apparatus under the same inventive concept as Embodiment 1 to Embodiment 4 of the present invention.
  • the device includes: a transceiver 21 and a processor 22, wherein the transceiver 21 and the processor 22 are connected Connected via bus 23.
  • the transceiver 21 is configured to receive a first circuit domain paging request sent by the mobile switching center MSC to indicate that the terminal falls back to the circuit domain;
  • the processor 22 is configured to determine, after the transceiver receives the first circuit domain paging request, that the terminal is in a connected state;
  • the transceiver 21 is further configured to: according to the first circuit domain paging request received by the transceiver, and the processor determining that the terminal is in a connected state, sending a circuit domain paging notification to the terminal;
  • the machine 21 is further configured to communicate with the evolved base station eNodeB;
  • the processor 22 is further configured to communicate with the eNodeB by using the transceiver, and change a state of the terminal to an idle state;
  • the transceiver 21 is further configured to send, according to the first circuit domain paging request received by the transceiver, the processor to change a state of the terminal to an idle state, and send a second circuit domain to the terminal. Paging request.
  • the processor 22 is configured to determine, according to the first time period after the transceiver sends the circuit domain paging notification, the response message of the terminal to the circuit domain paging notification, and determine The terminal does not normally respond to the circuit domain paging notification.
  • the transceiver 21 is further configured to receive a connection context release request of the terminal sent by the eNodeB within a first time period after sending the circuit domain paging notification;
  • the processor 22 is configured to determine, according to the connection context release request received by the transceiver, that the terminal does not normally respond to the circuit domain paging notification.
  • the transceiver 21 is configured to send, to the eNodeB, a connection context release command of the terminal;
  • the transceiver 21 is configured to receive a connection context completion message of the terminal sent by the eNodeB.
  • the processor 22 is configured to change a state of the terminal to an idle state.
  • the transceiver 21 is configured to send, according to the second circuit domain paging request After the second period of time, the terminal does not receive the response message of the second circuit domain paging request by the terminal, to the
  • the MSC sends a paging failure message.
  • the transceiver 21 is configured to receive, by the terminal, an accept response message to the second circuit domain paging request in a second time period after the sending the second circuit domain paging request;
  • the transceiver 21 is configured to send, to the eNodeB, an indication message for indicating that the terminal performs circuit domain fallback.
  • the transceiver 21 is configured to receive, in a second time period after sending the second circuit domain paging request, a reject response message of the terminal to the second circuit domain paging request.
  • the transceiver 21 is configured to send a paging failure message to the MSC.
  • the processor 22 is configured to query a status of the terminal, and determine, according to the query result, that the terminal is in a connected state.
  • the device in the sixth embodiment of the present invention may be the physical device of the execution entity mobility management entity according to the first embodiment to the fourth embodiment of the present invention, and may also be a logical unit in the mobility management entity, or may be The logic components integrated in other devices on the network side are not limited here.
  • embodiments of the present invention can be provided as a method, apparatus (device), or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can be embodied in the form of one or more computer program products embodied on a computer-usable storage medium (including but not limited to disk storage, CD-ROM, optical storage, etc.) in which computer usable program code is embodied.
  • a computer-usable storage medium including but not limited to disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions can also be stored in a bootable computer or other programmable data processing device.
  • a computer readable memory that operates in a particular manner, causing instructions stored in the computer readable memory to produce an article of manufacture comprising instruction means implemented in one or more flows and/or block diagrams of the flowchart The function specified in the box or in multiple boxes.
  • 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 specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

本发明公开了一种呼叫处理的方法、设备和移动性管理实体,包括:MME接收MSC发送的用于指示终端回落到电路域的第一电路域寻呼请求,所述MME确定所述终端处于连接态,根据所述第一电路域寻呼请求,所述MME向所述终端发送电路域寻呼通知,所述MME确定所述终端未正常响应所述电路域寻呼通知,所述MME通过与演进基站eNodeB通信将所述终端的状态变迁为空闲态,所述MME根据所述第一电路域寻呼请求,向所述终端发送第二电路域寻呼请求,这样额外增加一次对终端的寻呼操作,不仅能够使得终端出现异常时及时通知所述MSC暂停前转等待操作,节省了网络资源;而且增加了一次终端被寻呼的机会,提高了终端语音呼叫的成功率。

Description

一种呼叫处理的方法、 设备和移动性管理实体 技术领域 本发明涉及无线通信领域, 尤其涉及一种基于电路域的呼叫处理的方法、 设备和移动性管理实体。 背景技术
随着无线数据业务需求的增长和 LTE ( Long Term Evolution, 长期演进) 扁平化网络系统商用条件的成熟,运营商在现有 GERAN/UTRAN( GSM EDGE Radio Access Network/UMTS Territorial Radio Access Network, GSM/EDGE无 线接入网/ UMTS陆地无线接入网 ) 网络的基础上, 将逐步引入 LTE网络以满 足人们快速增长的无线数据业务需求, 但是如何在引入 LTE网络的同时为用 户提供语音业务服务, 成为运营商引入 LTE网络不得不面对的问题。
基于 CSFB ( Circuit Switched Fallback, 电路域语音回落)技术的语音业 务, 是一种在不引入 IMS ( IP Multimedia Subsystem , IP多媒体子系统)的情 况下, 利用现有的 GERAN/UTRAN网络实现语音通话的方案。 该方案在用户 终端发起语音业务时, 由 EPS ( Evolved Packet System, 演进包分组系统) 网 络指示用户终端回落到目标电路域网络之后, 发起语音呼叫。
具体地, CS Fallback是通过重用 Gs接口的方法来实现语音回落的, 即 MME ( Mobility Management Entity , 移动性管理实体) 和 MSC ( Mobile Switching Center, 移动交换中心)之间存在一个 SGs接口, 该 SGs接口的功 能与 SGSN ( Serving GPRS Support Node, 服务 GPRS支持节点)和 MSC之 间的 Gs接口的功能类似。
当用户终端是主叫终端时, 主叫终端在发起主叫语音业务后, 主叫终端 附着的 MME指示主叫终端服务当前接入的 eNodeB将主叫终端回落至目标电 路域网络中, 该 eNodeB 根据主叫终端的能力将主叫终端回落至目标电路域 网络中, 由主叫终端在目标电路域网络中发起主叫语音业务。 但是, 当用户终端是被叫终端时, MSC通知终端附着的 MME存在被叫 业务,并由终端附着的 MME指示终端服务当前接入的 eNodeB将终端回落至 目标电路域网络中, 该 eNodeB根据终端的能力将终端回落至目标电路域网 络中, 由终端在目标电路域网络中建立电路域连接, 完成与主叫终端的语音 通话业务。
在终端回落至目标电路域网络这一过程中,终端附着的 MME不仅发送响 应消息给 MSC, 而且还发送电路域回落消息给终端, 等待终端的电路域回落 消息的响应消息, 当终端进入信号盲区, 无法及时回复电路域回落消息的响 应消息给 MME时,或者当终端在回复电路域回落消息的响应消息给 MME之 前, 终端接入的 eNodeB由于与终端之间没有数据传输释放 S1链接使得 UE 处于空闲状态, MME没能接收到终端回复的电路域回落消息的响应消息, 导 致一直处于等待状态, 并造成呼叫失败; 同时, MSC在接收到 MME发送的 响应消息之后, 前转至 Iu/A接口等待终端的响应, 在终端出现异常时, 无法 及时获取该异常信息, 一直处于前转状态, 不能及时发起新的语音业务, 造 成语音呼叫的成功率低。
由此可见, 亟需一种基于电路域的呼叫处理方法, 用于解决现有 CSFB 技术存在的终端出现异常时语音呼叫成功率低的问题。 发明内容
本发明实施例提供了一种呼叫处理方法、 设备和移动性管理实体, 用于 解决现有 CSFB技术存在的终端出现异常时语音呼叫成功率低的问题。
根据本发明的第一方面, 提供了一种呼叫处理方法, 包括:
移动管理实体 MME接收移动交换中心 MSC发送的用于指示终端回落到 电路域的第一电路域寻呼请求;
所述 MME确定所述终端处于连接态,根据所述第一电路域寻呼请求,所 述 MME向所述终端发送电路域寻呼通知;
所述 MME确定所述终端未正常响应所述电路域寻呼通知; 所述 MME通过与演进基站 eNodeB通信将所述终端的状态变迁为空闲 态;
所述 MME根据所述第一电路域寻呼请求 ,向所述终端发送第二电路域寻 呼请求。
在第一方面可能的实现方式中, 第一种可能的实现方式中, 所述 MME 确定所述终端未正常响应所述电路域寻呼通知, 包括:
所述 MME根据发送所述电路域寻呼通知后的第一时间段后未收到所述 终端对所述电路域寻呼通知的响应消息, 确定所述终端未正常响应所述电路 域寻呼通知。
在第一方面可能的实现方式中, 第二种可能的实现方式中, 所述 MME 确定所述终端未正常响应所述电路域寻呼通知, 包括:
所述 MME根据在发送所述电路域寻呼通知后的第一时间段之内所述 MME收到所述 eNodeB发送的所述终端的连接上下文释放请求, 确定所述终 端未正常响应所述电路域寻呼通知。
在第一方面的第一种可能的实现方式中, 或者, 在第一方面的第二种可 能的实现方式中, 第三种可能的实现方式中, 所述 MME 通过与演进基站 eNodeB通信将所述终端的状态变迁为空闲态, 包括:
所述 MME向所述 eNodeB发送所述终端的连接上下文释放命令; 所述 MME接收所述 eNodeB发送的所述终端的连接上下文完成消息; 所述 MME将所述终端的状态变迁为空闲态。
在第一方面可能的实现方式中, 或者, 在第一方面的第一种可能的实现 方式中, 或者, 在第一方面的第二种可能的实现方式中, 或者, 在第一方面 的第三种可能的实现方式中, 第四种可能的实现方式中, 还包括:
所述 MME根据发送所述第二电路域寻呼请求后的第二时间段后未收到 所述终端对所述第二电路域寻呼请求的响应消息, 向所述 MSC发送寻呼失败 消息。
在第一方面可能的实现方式中, 或者, 在第一方面的第一种可能的实现 方式中, 或者, 在第一方面的第二种可能的实现方式中, 或者, 在第一方面 的第三种可能的实现方式中, 第五种可能的实现方式中, 还包括:
所述 MME在发送所述第二电路域寻呼请求后的第二时间段内收到所述 终端对所述第二电路域寻呼请求的接受响应消息;
所述 MME向所述 eNodeB发送用于指示对所述终端进行电路域回落的指 示消息。
在第一方面可能的实现方式中, 或者, 在第一方面的第一种可能的实现 方式中, 或者, 在第一方面的第二种可能的实现方式中, 或者, 在第一方面 的第三种可能的实现方式中, 第六种可能的实现方式中, 还包括:
所述 MME在发送所述第二电路域寻呼请求后的第二时间段内收到所述 终端对所述第二电路域寻呼请求的拒绝响应消息;
所述 MME向所述 MSC发送寻呼失败消息。
在第一方面可能的实现方式中, 或者, 在第一方面的第一种可能的实现 方式中, 或者, 在第一方面的第二种可能的实现方式中, 或者, 在第一方面 的第三种可能的实现方式中, 或者, 在第一方面的第四种可能的实现方式中, 或者, 在第一方面的第五种可能的实现方式中, 或者, 在第一方面的第六种 可能的实现方式中,第七种可能的实现方式中,所述 MME确定所述终端处于 连接态, 包括:
所述 MME查询所述终端的状态,根据查询结果,确定所述终端处于连接 态。
根据本发明的第二方面, 提供了一种移动性管理实体 MME, 包括: 收发单元,用于接收移动交换中心 MSC发送的用于指示终端回落到电路 域的第一电路域寻呼请求;
处理单元, 用于在所述接收单元收到所述第一电路域寻呼请求后确定所 述终端处于连接态;
所述收发单元, 还用于根据所述接收单元接收的第一电路域寻呼请求以 及所述处理单元确定所述终端处于连接态, 向所述终端发送电路域寻呼通知; 所述收发单元, 还用于与演进基站 eNodeB通信;
所述处理单元,还用于通过所述收发单元与所述 eNodeB通信,将所述终 端的状态变迁为空闲态;
所述收发单元, 还用于根据所述收发单元接收的所述第一电路域寻呼请 电路域寻呼请求。
在第二方面可能的实现方式中, 第一种可能的实现方式中, 所述处理单 元, 用于根据所述收发单元发送所述电路域寻呼通知后的第一时间段后未收 到所述终端对所述电路域寻呼通知的响应消息, 确定所述终端未正常响应所 述电路域寻呼通知。
在第二方面可能的实现方式中, 第二种可能的实现方式中, 所述收发单 元, 还用于在发送所述电路域寻呼通知后的第一时间段之内接收所述 eNodeB 发送的所述终端的连接上下文释放请求;
所述处理单元, 用于根据所述收发单元接收的所述连接上下文释放请求, 确定所述终端未正常响应所述电路域寻呼通知。
在第二方面的第一种可能的实现方式中, 或者, 在第二方面的第二种可 能的实现方式中, 第三种可能的实现方式中, 所述收发单元, 用于向所述 eNodeB发送所述终端的连接上下文释放命令;
所述收发单元,用于接收所述 eNodeB发送的所述终端的连接上下文完成 消息;
所述处理单元, 用于将所述终端的状态变迁为空闲态。
在第二方面可能的实现方式中, 或者, 在第二方面的第一种可能的实现 方式中, 或者, 在第二方面的第二种可能的实现方式中, 或者, 在第二方面 的第三种可能的实现方式中, 第四种可能的实现方式中, 所述收发单元, 用 于根据发送所述第二电路域寻呼请求后的第二时间段后未收到所述终端对所 述第二电路域寻呼请求的响应消息, 向所述 MSC发送寻呼失败消息。 在第二方面可能的实现方式中, 或者, 在第二方面的第一种可能的实现 方式中, 或者, 在第二方面的第二种可能的实现方式中, 或者, 在第二方面 的第三种可能的实现方式中, 第五种可能的实现方式中, 所述收发单元, 用 于在发送所述第二电路域寻呼请求后的第二时间段内接收所述终端对所述第 二电路域寻呼请求的响应消息;
所述收发单元,用于向所述 eNodeB发送用于指示对所述终端进行电路域 回落的指示消息。
在第二方面可能的实现方式中, 或者, 在第二方面的第一种可能的实现 方式中, 或者, 在第二方面的第二种可能的实现方式中, 或者, 在第二方面 的第三种可能的实现方式中, 第六种可能的实现方式中, 还包括:
所述收发单元, 用于在发送所述第二电路域寻呼请求后的第二时间段内 收到所述终端对所述第二电路域寻呼请求的拒绝响应消息;
所述收发单元, 用于向所述 MSC发送寻呼失败消息。
在第二方面可能的实现方式中, 或者, 在第二方面的第一种可能的实现 方式中, 或者, 在第二方面的第二种可能的实现方式中, 或者, 在第二方面 的第三种可能的实现方式中, 或者在第二方面的第四种可能的实现方式中, 或者, 在第二方面的第五种可能的实现方式中, 或者, 在第二方面的第六种 可能的实现方式中, 第七种可能的实现方式中, 所述处理单元, 用于查询所 述终端的状态, 4艮据查询结果, 确定所述终端处于连接态。
根据本发明的第三方面, 提供了一种用于呼叫处理的设备, 包括: 处理 器和收发机, 其中,
所述收发机,用于接收移动交换中心 MSC发送的用于指示终端回落到电 路域的第一电路域寻呼请求;
所述处理器, 用于在所述收发机接收到所述第一电路域寻呼请求后确定 所述终端处于连接态;
所述收发机, 还用于根据所述收发机接收的第一电路域寻呼请求以及所 述处理器确定所述终端处于连接态, 向所述终端发送电路域寻呼通知; 所述收发机, 还用于与演进基站 eNodeB通信;
所述处理器,还用于通过所述收发机与所述 eNodeB通信,将所述终端的 状态变迁为空闲态;
所述收发机, 还用于根据所述收发机接收的所述第一电路域寻呼请求以 及所述处理器将所述终端的状态变迁为空闲态, 向所述终端发送第二电路域 寻呼请求。
在第三方面可能的实现方式中, 第一种可能的实现方式中, 所述处理器, 用于根据所述收发机发送所述电路域寻呼通知后的第一时间段后未收到所述 终端对所述电路域寻呼通知的响应消息, 确定所述终端未正常响应所述电路 域寻呼通知。
在第三方面可能的实现方式中, 第二种可能的实现方式中, 所述收发机, 还用于在发送所述电路域寻呼通知后的第一时间段之内接收所述 eNodeB发 送的所述终端的连接上下文释放请求;
所述处理器, 用于根据所述收发机接收的所述连接上下文释放请求, 确 定所述终端未正常响应所述电路域寻呼通知。
在第三方面的第一种可能的实现方式中, 或者, 在第三方面的第二种可 能的实现方式中,第三种可能的实现方式中,所述收发机,用于向所述 eNodeB 发送所述终端的连接上下文释放命令;
所述收发机,用于接收所述 eNodeB发送的所述终端的连接上下文完成消 息;
所述处理器, 用于将所述终端的状态变迁为空闲态。
在第三方面可能的实现方式中, 或者, 在第三方面的第一种可能的实现 方式中, 或者, 在第三方面的第二种可能的实现方式中, 或者, 在第三方面 的第三种可能的实现方式中, 第四种可能的实现方式中, 所述收发机, 用于 根据发送所述第二电路域寻呼请求后的第二时间段后未收到所述终端对所述 第二电路域寻呼请求的响应消息, 向所述 MSC发送寻呼失败消息。 在第三方面可能的实现方式中, 或者, 在第三方面的第一种可能的实现 方式中, 或者, 在第三方面的第二种可能的实现方式中, 或者, 在第三方面 的第三种可能的实现方式中, 第五种可能的实现方式中, 所述收发机, 用于 在发送所述第二电路域寻呼请求后的第二时间段内接收所述终端对所述第二 电路域寻呼请求的响应消息;
所述收发机,用于向所述 eNodeB发送用于指示对所述终端进行电路域回 落的指示消息。
在第三方面可能的实现方式中, 或者, 在第三方面的第一种可能的实现 方式中, 或者, 在第三方面的第二种可能的实现方式中, 或者, 在第三方面 的第三种可能的实现方式中, 第六种可能的实现方式中, 还包括:
所述收发机, 用于在发送所述第二电路域寻呼请求后的第二时间段内收 到所述终端对所述第二电路域寻呼请求的拒绝响应消息;
所述收发机, 用于向所述 MSC发送寻呼失败消息。
在第三方面可能的实现方式中, 或者, 在第三方面的第一种可能的实现 方式中, 或者, 在第三方面的第二种可能的实现方式中, 或者, 在第三方面 的第三种可能的实现方式中, 或者, 在第三方面的第四种可能的实现方式中, 或者, 在第三方面的第五种可能的实现方式中, 或者, 在第三方面的第六种 可能的实现方式中, 第七种可能的实现方式中, 所述处理器, 用于查询所述 终端的状态, 根据查询结果, 确定所述终端处于连接态。
本发明有益效果如下:
本发明实施例移动性管理实体 MME确定终端未正常响应电路域寻呼通 知时, 额外增加一次对终端的寻呼操作, 能够提高终端语音呼叫成功率。 附图说明
图 1为本发明实施例一的一种呼叫处理的方法的流程示意图;
图 2为本发明实施例二的一种呼叫处理的方法的流程示意图;
图 3为本发明实施例三的一种呼叫处理的方法的流程示意图; 图 4为本发明实施例四的一种呼叫处理的方法的流程示意图; 图 5为本发明实施例五的一种移动性管理实体 MME设备的结构示意图; 图 6为本发明实施例六的一种用于呼叫处理的设备的结构示意图。 具体实施方式
为了本发明的目的, 本发明实施例提供了一种呼叫处理的方法、 设备和 移动性管理实体, 在所述终端未正常响应所述电路域寻呼通知时, 额外增加 一次对终端的寻呼操作, 能够提高终端语音呼叫成功率。
下面结合说明书附图对本发明各个实施例进行详细描述。
实施例一:
如图 1 所示, 为本发明实施例一的一种呼叫处理的方法的流程示意图, 所述方法包括:
步骤 101 : 移动管理实体 MME接收移动交换中心 MSC发送的用于指示 终端回落到电路域的第一电路域寻呼请求。
当 MSC接收到携带了终端标识的语音呼叫请求时,确定所述终端标识对 应的终端为附着(Attached )状态, 并通过存在的 SGs接口确定所述终端附着 的 MME。
所述 MSC向确定的 MME发送用于指示所述终端回落到电路域的第一电 路域寻呼请求。
例如, 该第一电路域寻呼请求可以为 CS Paging Request 消息。
步骤 102: 所述 MME确定所述终端处于连接态, 根据所述第一电路域寻 呼请求, 所述 MME向所述终端发送电路域寻呼通知。
所述 MME在接收到第一电路域寻呼请求时, 可以查询所述终端的状态 , 根据查询结果, 确定所述终端处于连接态。
例如 ,所述 MME根据该第一电路域寻呼请求中包含的终端标识 ,查询当 前所述终端标识对应的该终端的状态信息;
当查询到所述终端的状态信息是处于连接状态时, 确定所述终端当前处 于连接状态;
当查询到所述终端的状态信息是处于空闲状态时, 确定所述终端当前处 于空闲状态。
所述 MME在确定所述终端处于连接态时,可以在已有的信令链路上向所 述终端发送电路域寻呼通知( CS Paging Notification ) ,也可以是电路域业务通 知 ( CS Service Notification )。
同时, 所述 MME可以向所述 MSC发送呼叫应答消息, 通知所述 MSC 已将电路域寻呼通知消息发送给所述终端, 正在等待终端的寻呼响应消息。
例如, 所述呼叫应答消息可以是业务请求( Service Request ) 消息。
所述 MSC在接收到所述 MME发送的呼叫应答消息时, 可以前转至 Iu/A 接口等待所述终端的呼叫响应。
步骤 103: 所述 MME确定所述终端未正常响应所述电路域寻呼通知。 所述 MME确定所述终端未正常响应所述电路域寻呼通知的方式包括但 不限于以下方式:
第一种方式:
所述 MME根据发送所述电路域寻呼通知后的第一时间段后未收到所述 终端对所述电路域寻呼通知的响应消息, 确定所述终端未正常响应所述电路 域寻呼通知。
例如,所述 MME向所述终端发送电路域寻呼通知之后,可以启动第一定 时器,所述 MME判断在所述第一定时器计时到达设定第一时长这一时间间隔 中是否接收到所述终端返回的所述电路域寻呼通知响应消息。
所述设定第一时长可以是指从开启第一定时器开始计时, 计时数值达到 设定数值结束的这一时长。
所述设定第一时长可以设置为 8秒, 还可以根据需要设置成为其他时间 长度, 这里不做限定。
所述 MME在向所述终端发送电路域寻呼通知后 ,处于等待接收所述终端 返回所述电路域寻呼通知响应消息的状态。 由于在所述 MME根据所述第一电路域寻呼请求,向所述终端发送电路域 寻呼通知这一信令传输的过程中, 终端的连接状态可以随时发生改变, 即由 正常的连接状态转换成为连接异常状态 (例如: 所述终端进入通信网络的盲 区, 无法与 MME之间进行通信等), 或者由正常的连接状态转换成为连接空 闲状态 (即所述终端与当前接入的演进基站 eNodeB之间没有数据传输等 ), 使得所述 MME将持续等待所述终端返回所述电路域寻呼通知响应消息,导致 所述 MME等待所述电路域寻呼通知响应消息超时, 因此, 所述 MME在发送 电路域寻呼通知给所述终端后, 即时启动第一定时器, 监控在所述第一定时 器计时到达设定第一时长这一时间间隔中是否接收到所述终端返回的所述电 路域寻呼通知响应消息, 实时确定所述终端在通信网络中的连接状态。
第二种方式:
所述 MME根据在发送所述电路域寻呼通知后的第一时间段之内所述 MME接收到所述 eNodeB发送的所述终端的连接上下文释放请求, 确定所述 终端未正常响应所述电路域寻呼通知。
其中, 所述终端的连接上下文释放请求可以为终端上下文释放请求(UE Context Release Request ) 消息。
所述 MME向所述终端发送电路域寻呼通知之后,启动第一定时器,所述 MME 判断在所述第一定时器计时到达设定第一时长这一时间间隔中是否接 收到所述 eNodeB发送的所述终端的连接上下文释放请求。
所述设定第一时长是指从开启第一定时器开始计时, 计时数值达到设定 数值结束的这一时长。
所述设定第一时长可以设置为 8秒, 还可以根据需要设置成为其他时间 长度, 这里不做限定。
当所述 MME在所述第一定时器计时到达设定第一时长这一时间间隔中 接收到所述 eNodeB发送的所述终端的连接上下文释放请求,确定所述终端未 正常响应所述电路域寻呼通知。
需要说明的是,启动第一定时器时,设置 MME等待接收所述终端响应所 述电路域寻呼通知的时间, 例如: Start Tl—MME, CS Paging Notification=第 一时长 =8S; 还可以设置在所述第一定时器计时到达所述第一时长时, 跳转执 行的操作, 例如: 在所述第一定时器计时到达所述第一时长时, 触发执行步 骤 104 ( Trigger 104 When expires )。
由此可见,所述 MME在发送所述电路域寻呼通知后的第一时间段之内出 现以下至少一种情况时, 确定所述终端未正常响应所述电路域寻呼通知: 在发送所述电路域寻呼通知后的第一时间段后未收到所述终端对所述电 路域寻呼通知的响应消息;
在发送所述电路域寻呼通知后的第一时间段之内所述 MME接收到所述 eNodeB发送的所述终端的连接上下文释放请求。
需要说明的是, 所述第一时间段可以是预设的, 还可以是通过定时器控 制的, 这里不做限定。
需要说明的是, 所述终端响应所述电路域寻呼通知可以为扩展业务请求 ( Extend Service Request ) 消息。 通过与演进基站 eNodeB通信将所述终端的状态变迁为空闲态。
具体地, 在步骤 104中, 所述 MME通过与演进基站 eNodeB通信将所述 终端的状态变迁为空闲态的方式包括但不限于以下方式:
首先, 所述 MME向所述 eNodeB发送所述终端的连接上下文释放命令。 例如, 所述终端的连接上下文释放命令可以为终端上下文释放命令 ( UE
Context Release Command ) 消息。
其次,所述 MME接收所述 eNodeB发送的所述终端的连接上下文完成消 息。
所述 eNodeB 在接收所述终端的连接上下文释放命令时, 释放所述 eNodeB与所述终端之间的 S1连接, 并发送所述终端的连接上下文完成消息 给所述 MME。
例如, 所述终端的连接上下文完成消息可以为终端上下文释放完成(UE Context Release Complete ) 消息。
第三, 所述 MME将所述终端的状态变迁为空闲态。
步骤 105: 所述 MME根据所述第一电路域寻呼请求, 向所述终端发送第 二电路域寻呼请求。
具体地, 在步骤 105中, 所述 MME通过与演进基站 eNodeB通信将所述 终端的状态变迁为空闲态, 无法接收到所述终端返回的所述电路域寻呼通知 响应消息, 根据所述第一电路域寻呼请求, 及时向所述终端发起第二电路域 寻呼请求, 这样额外增加一次寻呼, 增加了终端与终端之间语音呼叫的成功 率。
步骤 106: 所述 MME根据所述终端对所述第二电路域寻呼请求的响应情 况, 执行后续操作。
例如,所述 MME在对所述终端发起第二电路域寻呼请求后, 当在设定时 长内接收到所述终端对所述第二电路域寻呼请求的接受响应消息,所述 MME 向所述 eNodeB发送用于指示对所述终端进行电路域回落的指示消息。
该指示消息指示所述终端回落至目标网络, 建立电路域连接完成语音通 话。
例如,所述接受响应消息可以为 Extended Service Request消息,所述 MME 在确定所述终端响应来自 CS域的呼叫时, 向所述所述 eNodeB发送包含了 UE Radio Capabilities参数和 CS Fallback Indicator参数的 Initial Context Setup Request消息, 指示所述 eNodeB将所述终端回落到目标电路域网络, 并接收 所述 eNodeB返回的 Initial Context Setup Request消息。 一次对终端的寻呼操作, 能够提高终端语音呼叫成功率。
或者, 当在设定时长内未接收到所述终端对所述第二电路域寻呼请求的 响应消息, 所述 MME向所述终端所属的移动交换中心 MSC发送寻呼失败消 息; 还可以通知所述 MSC, 使其暂停前转等待操作。
在向所述 MSC发送的寻呼失败消息中可以包含失败原因为 UE 不可达 ( UE unreachable )。
可见, 当在设定的时长内未接收到所述终端返回的寻呼响应消息时, 所 述 MME及时通知所述终端所属的 MSC,使得所述 MSC能够暂停前转等待操 作, 节省了网络资源。
或者,所述 MME在设定时长内接收到所述终端对所述第二电路域寻呼请 求的拒绝响应消息, 所述 MME向所述终端所属的 MSC发送寻呼失败消息。 寻呼失败消息中可以包括失败原因为用户拒绝 CS呼叫。
例如, 所述拒绝响应消息可以为 Extended Service Request消息, 当所述 MME接收到的 Extended Service Request消息中携带了拒绝响应指令 (例如: Paging Reject指令)。
通过本发明实施例一的方案,移动性管理实体 MME在终端未正常响应所 述电路域寻呼通知时, 额外增加一次对终端的寻呼操作, 能够提高终端语音 呼叫成功率。 当在设定的时长内未接收到所述终端返回的寻呼响应消息时, 及时通知移动交换中心 MSC, 以使所述 MSC暂停前转等待操作, 节省了网 络资源。
实施例二:
如图 2所示, 为本发明实施例二的一种呼叫处理的方法的流程示意图。 本发明实施例二是对本发明实施例一的详细描述, 所述方法包括:
步骤 201 : 移动管理实体 MME接收移动交换中心 MSC发送的用于指示 终端回落到电路域的第一电路域寻呼请求。
当 MSC接收到携带了终端标识的语音呼叫请求时,确定所述终端标识对 应的终端的 Attached状态 ,并通过存在的 SGs接口确定所述终端附着的 MME。
所述 MSC向确定的 MME发送用于指示所述终端回落到电路域的第一电 路域寻呼请求, 通知所述 MME存在呼叫所述终端标识对应的终端的呼叫指 示。
具体地, 所述第一电路域寻呼请求可以为呼叫指示信息, 还可以为 CS Paging Request 消息。 所述 MME在接收第一电路域寻呼请求时 ,查询所述终端当前所处的网络 状态, 是连接状态还是空闲状态。
例如:所述 MME在接收到移动交换中心发送的包含了终端标识的第一电 路域寻呼请求时, 查询当前所述终端标识对应的终端的状态信息;
当查询到所述终端的状态信息是处于连接状态时, 则确定所述终端当前 处于连接状态;
当查询到所述终端的状态信息是处于空闲状态时, 则确定所述终端当前 处于空闲状态。
并所述 MME在查询确定所述终端当前处于连接状态时, 执行以下操作。 步骤 202: 所述 MME确定所述终端处于连接态, 根据所述第一电路域寻 呼请求, 所述 MME向所述终端发送电路域寻呼通知。
在步骤 202中,所述 MME确定所述终端处于连接态时,根据所述第一电 路域寻呼请求, 可以在已有的信令链路上向所述终端发送电路域寻呼通知, 也可以是电路域业务通知。
例如, 所述电路域寻呼通知可以为 CS Paging Notification消息, 所述电路 域业务通知可以为 CS Service Notification消息。
同时, 所述 MME可以向所述 MSC发送呼叫应答消息, 通知所述 MSC 已将电路域寻呼通知消息发送给所述终端, 正在等待终端的寻呼响应消息。
例如, 所述呼叫应答消息可以为业务请求( Service Request ) 消息。
所述 MSC在接收到所述 MME发送的呼叫应答消息时, 可以前转至 Iu/A 接口等待所述终端的呼叫响应。
步骤 203: 所述 MME向所述终端发送电路域寻呼通知之时, 启动第一定 时器。
步骤 204: 所述 MME判断在所述第一定时器计时到达设定第一时长这一 时间间隔中是否接收到所述终端返回的所述电路域寻呼通知响应消息, 若否, 则执行步骤 205; 若是, 则执行步骤 213。
其中, 所述设定第一时长可以是指从开启第一定时器开始计时, 计时数 值达到设定数值结束的这一时长。
所述设定第一时长可以设置为 8秒, 还可以根据需要设置成为其他时间 长度, 这里不做限定。
所述 MME在向所述终端发送电路域寻呼通知后 ,一直处于等待接收所述 终端返回所述电路域寻呼通知响应消息的状态。
由于在所述 MME根据所述第一电路域寻呼请求,向所述终端发送电路域 寻呼通知这一信令传输的过程中, 终端的连接状态可以随时发生改变, 即由 正常的连接状态转换成为连接异常状态 (例如: 所述终端进入通信网络的盲 区, 无法与 MME之间进行通信等), 或者由正常的连接状态转换成为连接空 闲状态 (即所述终端与当前接入的演进基站 eNodeB之间没有数据传输等 ), 使得所述 MME将持续等待所述终端返回所述电路域寻呼通知响应消息,导致 所述 MME等待所述电路域寻呼通知响应消息超时, 因此, 所述 MME在发送 电路域寻呼通知给所述终端后, 即时启动第一定时器, 监控在所述第一定时 器计时到达设定第一时长这一时间间隔中是否接收到所述终端返回的所述电 路域寻呼通知响应消息, 实时确定所述终端在通信网络中的连接状态。
步骤 205: 所述 MME根据在所述第一定时器计时到达设定第一时长这一 时间间隔中未接收到所述终端返回的所述电路域寻呼通知响应消息, 确定所 述终端未正常响应所述电路域寻呼通知。 通过与演进基站 eNodeB通信将所述终端的状态变迁为空闲态。
在步骤 206中, 首先, 所述 MME向所述 eNodeB发送所述终端的连接上 下文释放命令。
例如, 所述终端的连接上下文释放命令可以为终端上下文释放命令 ( UE Context Release Command ) 消息。
其次,所述 MME接收所述 eNodeB发送的所述终端的连接上下文完成消 息。
所述 eNodeB 在接收所述终端的连接上下文释放命令时, 释放所述 eNodeB与所述终端之间的 SI连接, 并发送所述终端的连接上下文完成消息 给所述 MME。
其中, 所述终端的连接上下文完成消息可以为终端上下文释放完成(UE Context Release Complete ) 消息 载发送。
第三, 所述 MME将所述终端的状态变迁为空闲态。
步骤 207: 所述 MME根据所述第一电路域寻呼请求, 向所述终端发送第 二电路域寻呼请求。
具体地, 在步骤 207中, 所述 MME通过与演进基站 eNodeB通信将所述 终端的状态变迁为空闲态, 无法接收到所述终端返回的所述电路域寻呼通知 响应消息, 根据所述第一电路域寻呼请求, 及时向所述终端发起第二电路域 寻呼请求, 这样额外增加一次寻呼, 增加了终端与终端之间语音呼叫的成功 率。
步骤 208: 所述 MME判断在发送所述第二电路域寻呼请求后的第二时间 段内是否接收到所述终端对所述第二电路域寻呼请求的响应消息, 若接收到, 则执行步骤 209 211 ; 否则, 执行步骤 212。
步骤 209: 所述 MME在设定时长内接收到所述终端对所述第二电路域寻 呼请求的响应消息, 判断所述第二电路域寻呼请求的响应消息中是否包含了 拒绝来自 CS域的呼叫的指令, 若包含了拒绝指令, 则执行步骤 210; 若没有 包含拒绝指令, 则执行步骤 211。
具体地, 所述第二电路域寻呼请求的响应消息可以为 Extended Service Request消息。
所述终端根据接收到的第二电路域寻呼请求中携带的核心网域类型为电 路域 , 判断是否响应来自 CS域的呼叫, 并将所述第二电路域寻呼请求的响 应消息发送给所述 MME。
步骤 210: 当所述 MME接收到的所述终端发送的所述第二电路域寻呼请 求的响应消息中包含了拒绝指令时, 所述 MME发送拒绝响应消息 (例如: SGsAP-PAGING-REJECT消息)给所述 MSC, 结束 CS域呼叫操作。 其中, 寻呼失败消息中可以包括失败原因为用户拒绝 CS呼叫。 所述 MSC在接收到所述 ΜΜΕ发送的拒绝语音呼叫信息时, 暂停前转等 待操作, 前转至 Iu/A接口发起对所述终端的语音呼叫业务。
步骤 211: 当所述 MME接收到的所述终端发送的所述第二电路域寻呼请 求的响应消息中未包含拒绝指令时, 所述 MME确定所述终端响应来自 CS域 的呼叫, 向所述 eNodeB发送用于指示对所述终端进行电路域回落的指示消 息。
具体地, 在步骤 211中, 所述 MME在确定所述终端响应来自 CS域的呼 叫时, 向所述 eNodeB发送包含了终端无线收发能力 UE Radio Capabilities参 数和 CS域语音回落指示 CS Fallback Indicator参数的初始上下文建立请求 Initial Context Setup Request消息,指示所述 eNodeB将所述终端回落到目标电 路域网络, 并接收所述 eNodeB 返回的初始上下文建立回复 Initial Context Setup Response消息。
步骤 212: 所述 MME在设定时长内未接收到所述终端对所述第二电路域 寻呼请求的响应消息, 向所述 MSC发送寻呼失败消息。
具体地,在步骤 212中,所述 MME在设定时长内未接收到所述终端对所 述第二电路域寻呼请求的响应消息, 确定所述终端处于异常连接状态, 不能 够响应本次寻呼, 向所述终端所属的移动交换中心 MSC发送寻呼失败消息, 还可以通知所述 MSC, 使其暂停前转等待操作。
步骤 213: 所述 MME根据在所述第一定时器计时到达设定第一时长这一 时间间隔中接收到所述终端返回的所述电路域寻呼通知响应消息, 向所述 eNodeB发送用于指示对所述终端进行电路域回落的指示消息。
在步骤 213中,在所述 MME向所述 eNodeB发送用于指示对所述终端进 行电路域回落的指示消息之前, 还可以进一步判断所述电路域寻呼通知响应 消息中是否包含了拒绝来自 CS域的呼叫的指令,后续执行的操作与步骤 209~ 步骤 212相同, 这里不 #丈赞述。
通过本发明实施例二的方案,移动性管理实体 MME在确定所述终端未正 常响应所述电路域寻呼通知时, 向所述终端发送第二电路域寻呼请求, 额外 增加一次对终端的寻呼操作, 能够提高终端语音呼叫成功率。 当在设定的时 长内未接收到所述终端返回的寻呼响应消息时,及时通知移动交换中心 MSC, 以使所述 MSC暂停前转等待操作, 节省了网络资源。
实施例三:
如图 3 所示, 为本发明实施例三的一种呼叫处理的方法的流程示意图, 本发明实施例三是与本发明实施例一和本发明实施例二在同一构思下的发 明, 所述方法包括:
步骤 301 : 移动管理实体 MME接收移动交换中心 MSC发送的用于指示 终端回落到电路域的第一电路域寻呼请求。
当 MSC接收到携带了终端标识的语音呼叫请求时,确定所述终端标识对 应的终端的 Attached状态 ,并通过存在的 SGs接口确定所述终端附着的 MME。
所述 MSC向确定的 MME发送用于指示所述终端回落到电路域的第一电 路域寻呼请求。
例如, 所述第一电路域寻呼请求可以为 CS Paging Request 消息, 还可以 为 SGs AP-PAGING-REQUEST消息。
所述 MME在接收到第一电路域寻呼请求时,查询所述终端的状态,根据 查询结果, 确定所述终端处于连接态。
例如,所述 MME在接收到移动交换中心发送的包含了终端标识的第一电 路域寻呼请求时, 查询当前所述终端标识对应的终端的状态信息;
当查询到所述终端的状态信息是处于连接状态时, 确定所述终端当前处 于连接状态;
当查询到所述终端的状态信息是处于空闲状态时, 确定所述终端当前处 于空闲状态。
所述 MME在查询确定所述终端当前处于连接状态时, 执行以下操作。 步骤 302: 所述 MME确定所述终端处于连接态, 根据所述第一电路域寻 呼请求, 所述 MME向所述终端发送电路域寻呼通知。 所述 MME确定所述终端处于连接态时, 根据所述第一电路域寻呼请求 , 可以在已有的信令链路上向所述终端发送电路域寻呼通知 (CS Paging Notification ), 也可以是电路域业务通知 ( CS Service Notification )。
同时, 所述 MME可以向所述 MSC发送呼叫应答消息, 通知所述 MSC 已将电路域寻呼通知消息发送给所述终端, 正在等待终端的寻呼响应消息。
例如, 所述呼叫应答消息可以是业务请求 Service Request消息。
所述 MSC在接收到所述 MME发送的呼叫应答消息时, 可以前转至 Iu/A 接口等待所述终端的呼叫响应。
步骤 303: 所述 MME根据在发送所述电路域寻呼通知后的第一时间段之 内所述 MME接收到所述 eNodeB发送的所述终端的连接上下文释放请求,确 定所述终端未正常响应所述电路域寻呼通知。
其中,所述终端的连接上下文释放请求可以为 UE Context Release Request 消息。
具体地,所述 MME向所述终端发送电路域寻呼通知之后,启动第一定时 器, 并判断在所述第一定时器计时到达设定第一时长这一时间间隔中是否接 收到所述 eNodeB发送的所述终端的连接上下文释放请求。
所述设定第一时长可以是指从开启第一定时器开始计时, 计时数值达到 设定数值结束的这一时长。
所述设定第一时长可以设置为 8秒, 还可以根据需要设置成为其他时间 长度, 这里不做限定。
需要说明的是, 所述发送所述电路域寻呼通知后的第一时间段的长度值 可以与设定的第一时长的计算方式相同, 也可以不同, 这里不做限定。
当所述 MME在所述第一定时器计时到达设定第一时长这一时间间隔中 接收到所述 eNodeB发送的所述终端的连接上下文释放请求,确定所述终端未 正常响应所述电路域寻呼通知。
需要说明的是,启动第一定时器时,设置 MME等待接收所述终端响应所 述电路域寻呼通知的时间, 例如: Start Tl—MME, CS Paging Notification=第 一时长 =8S; 还可以设置在所述第一定时器计时到达所述第一时长时, 跳转执 行的操作, 例如: 在所述第一定时器计时到达所述第一时长时, 触发执行步 骤 104 ( Trigger 104 When expires )。 通过与演进基站 eNodeB通信将所述终端的状态变迁为空闲态。
具体地, 在步骤 304中, 所述 MME通过与演进基站 eNodeB通信将所述 终端的状态变迁为空闲态的方式包括但不限于以下方式:
首先, 所述 MME向所述 eNodeB发送所述终端的连接上下文释放命令。 例如, 所述终端的连接上下文释放命令可以为 UE Context Release
Command消息。
其次,所述 MME接收所述 eNodeB发送的所述终端的连接上下文完成消 息。
例如, 所述 eNodeB在接收所述终端的连接上下文释放命令时,释放所述 eNodeB与所述终端之间的 S1连接, 并发送所述终端的连接上下文完成消息 给所述 MME。
其中, 所述终端的连接上下文完成消息可以为 UE Context Release Complete消息。
第三, 所述 MME将所述终端的状态变迁为空闲态。
步骤 305: 所述 MME根据所述第一电路域寻呼请求, 向所述终端发送第 二电路域寻呼请求。
具体地, 在步骤 305中, 所述 MME通过与演进基站 eNodeB通信将所述 终端的状态变迁为空闲态, 无法接收到所述终端返回的所述电路域寻呼通知 响应消息, 根据所述第一电路域寻呼请求, 及时向所述终端发起第二电路域 寻呼请求, 这样额外增加一次寻呼, 增加了终端与终端之间语音呼叫的成功 率。
步骤 306: 所述 MME判断在发送所述第二电路域寻呼请求后的第二时间 段后是否收到所述终端对所述第二电路域寻呼请求的响应消息, 若是, 则执 行步骤 307; 若否, 则执行步骤 30 。
例如,所述 MME在向所述终端发起第二电路域寻呼请求时,启动第二定 时器, 并判断在所述第二定时器计时到达设定第二时长这一时间间隔中是否 接收到所述终端返回的第二电路域寻呼请求的响应消息, 若接收到, 则执行 步骤 307或者步骤 30 ; 否则, 执行步骤 308。
所述设定第二时长可以是指从开启第二定时器开始计时, 计数数值到达 设定数值结束的这一段时长, 所述第二时长小于所述第一时长。
例如, 所述第一时长为 8秒, 所述第二时长为 6秒, 这里不做限定。 需要说明的是, 在步骤 306 中, 所述发送所述第二电路域寻呼请求后的 第二时间段可以通过第二定时器计时实现, 还可以通过其他方式实现, 这里 不做限定。
具体地, 在步骤 306中, 所述 MME在向所述终端发起第二次寻呼后, 需 要等待一段时间接收所述终端的响应消息 (例如: Extend Service Request消 息), 此时启动第二定时器, 所述 MME可以对接收所述终端的响应消息的时 间进行检测, 避免了超时等待, 还能及时确定所述终端是否处于异常状态。
步骤 307: 所述 MME在发送所述第二电路域寻呼请求后的第二时间段内 收到所述终端对所述第二电路域寻呼请求的接受响应消息,向所述 eNodeB发 送用于指示对所述终端进行电路域回落的指示消息。
该指示消息指示所述终端回落至目标网络, 建立电路域连接完成语音通 话。
例如,所述接受响应消息可以为 Extended Service Request消息,所述 MME 在确定所述终端响应来自 CS域的呼叫时, 向所述所述 eNodeB发送包含了 UE Radio Capabilities参数和 CS Fallback Indicator参数的 Initial Context Setup Request消息, 指示所述 eNodeB将所述终端回落到目标电路域网络, 并接收 所述 eNodeB返回的 Initial Context Setup Request消息。 一次对终端的寻呼操作, 能够提高终端语音呼叫成功率。 步骤 30 :所述 MME在设定时长内接收到所述终端对所述第二电路域寻 呼请求的拒绝响应消息, 所述 MME向所述终端所属的 MSC发送寻呼失败消 息。 寻呼失败消息中可以包括失败原因为用户拒绝 CS呼叫。
例如, 所述拒绝响应消息可以为 Extended Service Request消息, 当所述 MME接收到的 Extended Service Request消息中携带了拒绝响应指令 (例如: Paging Reject指令)。
可选地,在执行步骤 307或者步骤 3077之前,还可以所述 MME还可以进 一步判断所述电路域寻呼通知响应消息中是否包含了拒绝来自 CS 域的呼叫 的指令, 若包含了拒绝指令, 则执行步骤 30 ; 否则, 执行步骤 307, 具体方 式与本发明实例二中步骤 209〜步骤 211的方式相同, 这里不做赘述。
步骤 308: 所述 MME在发送所述第二电路域寻呼请求后的第二时间段内 未收到所述终端对所述第二电路域寻呼请求的响应消息, 向所述终端所属的 移动交换中心 MSC发送寻呼失败消息。
在步骤 308中 ,所述 MME在所述第二定时器定时到达设定第二时长时未 接收到所述终端返回的所述第二电路域寻呼请求的响应消息, 向所述终端所 属的移动交换中心 MSC发送寻呼失败消息。
在向所述 MSC发送的寻呼失败消息中可以包含失败原因为 UE 不可达 ( UE unreachable )。
所述 MSC在接收到所述 MME发送的寻呼失败消息时, 暂停前转等待操 作, 前转至 Iu/A接口发起对所述终端的语音呼叫业务。
所述 MSC还可以重新发起对所述终端的语音呼叫业务。
通过本发明实施例三的方案, 移动性管理实体 MME接收移动交换中心 MSC发送的用于指示终端回落到电路域的第一电路域寻呼请求, 所述 MME 确定所述终端处于连接态,根据所述第一电路域寻呼请求,所述 MME向所述 终端发送电路域寻呼通知,所述 MME确定所述终端未正常响应所述电路域寻 呼通知,所述 MME通过与演进基站 eNodeB通信将所述终端的状态变迁为空 闲态,所述 MME根据所述第一电路域寻呼请求,向所述终端发送第二电路域 寻呼请求, 并判断在发送所述第二电路域寻呼请求后的第二时间段内未接收 到所述终端对所述第二电路域寻呼请求的响应消息, 向所述终端所属的移动 交换中心 MSC发送寻呼失败消息, 以使所述 MSC暂停前转等待操作; 以及 在发送所述第二电路域寻呼请求后的第二时间段内接收到所述终端对所述第 二电路域寻呼请求的接受响应消息,向所述 eNodeB发送用于指示对所述终端 进行电路域回落的指示消息, 使得所述终端回落至目标网络, 实现语音呼叫, 额外增加一次对终端的寻呼操作, 不仅能够使得终端出现异常时及时通知所 述 MSC暂停前转等待操作, 节省了网络资源; 而且增加了一次终端被寻呼的 机会, 提高了终端语音呼叫的成功率。
实施例四:
如图 4所示, 为本发明实施例四的一种呼叫处理的方法的流程示意图, 本发明实施例四是与本发明实施例一至本发明实施例三在同一发明构思下的 方法, 所述方法包括:
步骤 401:移动交换中心 MSC接收到携带了终端标识的语音呼叫请求时, 确定所述终端标识对应的终端的 Attached状态, 并通过存在的 SGs接口确定 所述终端附着的 MME。
步骤 402: 所述 MSC向确定的 MME发送用于指示所述终端回落到电路 域的第一电路域寻呼请求。
在步骤 402 中, 所述第一电路域寻呼请求可以为 SGs 口寻呼请求 SGsAP-PAGING-REQUEST消息。
步骤 403: 所述 MME在接收到第一电路域寻呼请求时, 查询所述终端的 状态, 根据查询结果, 确定所述终端处于连接态。
在步骤 403 中, 所述终端当前所处的状态是指处于连接状态还是处于空 闲状态。
所述 MME在接收到所述 MSC发送的包含了终端标识的第一电路域寻呼 请求时, 查询当前所述终端标识对应的终端的状态信息;
当查询到所述终端的状态信息是处于连接状态时, 则确定所述终端当前 处于连接状态;
当查询到所述终端的状态信息是处于空闲状态时, 则确定所述终端当前 处于空闲状态。
例如: 所述 MME在接收到第一电路域寻呼请求时,通过所述终端与所述 MME上下行之间信令传输信息确定所述终端当前的状态。
若所述 MME查询到所述终端当前的状态是处于空闲状态,则指示演进基 站 eNodeB在空口资源中寻呼所述终端; 若所述 MME查询到所述终端当前的 状态是处于连接状态, 则执行步骤 404。
步骤 404: 所述 MME确定所述终端处于连接态, 根据所述第一电路域寻 呼请求, 所述 MME向所述终端发送电路域寻呼通知。
在步骤 404中,所述 MME确定所述终端处于连接态时,根据所述第一电 路域寻呼请求,可以在已有的信令链路上向所述终端发送电路域寻呼通知( CS Paging Notification ), 也可以是电路域业务通知( CS Service Notification )。
同时, 所述 MME可以向所述 MSC发送呼叫应答消息, 通知所述 MSC 已将电路域寻呼通知消息发送给所述终端, 正在等待终端的寻呼响应消息。
例如, 所述呼叫应答消息可以为 Service Request消息。
所述 MSC在接收到所述 MME发送的呼叫应答消息时,前转至 Iu/A接口 等待所述终端的呼叫响应。
步骤 405: 所述 MME向所述终端发送电路域寻呼通知之时, 启动第一定 时器。
步骤 406: 所述 MME判断在所述第一定时器计时到达设定第一时长这一 时间间隔中是否接收到所述终端返回的所述电路域寻呼通知响应消息, 若否, 则执行步骤 407; 若是, 则执行步骤 414。
所述设定第一时长可以是指从开启第一定时器开始计时, 计时数值达到 设定数值结束的这一时长。
例如: 所述设定第一时长可以设置为 8秒, 还可以根据需要设置成为其 他时间长度, 这里不做限定。 在步骤 406中,所述 MME在向所述终端发送电路域寻呼通知后,一直处 于等待接收所述终端返回所述电路域寻呼通知响应消息的状态。
步骤 407: 所述 MME进一步判断在所述第一定时器计时到达设定第一时 长这一时间间隔中是否接收到所述 eNodeB 发送的所述终端的连接上下文释 放请求, 若是, 则确定所述终端未正常响应所述电路域寻呼通知, 继续执行 步骤 408; 若否, 确定所述终端出现异常, 继续执行步骤 408。
具体地,在步骤 407中,所述 MME根据在所述第一定时器计时到达设定 第一时长这一时间间隔中未接收到所述终端返回的所述电路域寻呼通知响应 消息, 确定所述终端未正常响应所述电路域寻呼通知。
具体地,在步骤 407中,所述 MME在所述第一定时器计时到达设定第一 时长时, 既确定没有接收到所述终端返回的所述电路域寻呼通知的响应消息, 又确定没有接收到所述 eNodeB发送的所述终端的连接上下文释放请求,说明 所述终端当前的连接状态出现异常, 因此, 同样需要继续执行步骤 408。 通过与演进基站 eNodeB通信将所述终端的状态变迁为空闲态。
在步骤 408中,所述 MME通过与演进基站 eNodeB通信将所述终端的状 态变迁为空闲态的方式包括但不限于以下方式:
首先, 所述 MME向所述 eNodeB发送所述终端的连接上下文释放命令。 具体地, 所述终端的连接上下文释放命令可以为 UE Context Release
Command消息。
其次,所述 MME接收所述 eNodeB发送的所述终端的连接上下文完成消 息。
所述 eNodeB 在接收所述终端的连接上下文释放命令时, 释放所述 eNodeB与所述终端之间的 S1连接, 并发送所述终端的连接上下文完成消息 给所述 MME。
其中, 所述终端的连接上下文完成消息可以为 UE Context Release Complete消息。 第三, 所述 MME将所述终端的状态变迁为空闲态。
步骤 409: 所述 MME根据所述第一电路域寻呼请求, 向所述终端发送第 二电路域寻呼请求。
在步骤 409中,所述 MME通过与演进基站 eNodeB通信将所述终端的状 态变迁为空闲态, 无法接收到所述终端返回的所述电路域寻呼通知响应消息, 根据所述第一电路域寻呼请求, 及时向所述终端发起第二电路域寻呼请求, 这样额外增加一次寻呼, 增加了终端与终端之间语音呼叫的成功率。
步骤 410: 所述 MME在向所述终端发起第二电路域寻呼请求时, 启动第 二定时器。
步骤 411 : 所述 MME判断在所述第二定时器计时到达设定第二时长这一 时间间隔中是否接收到所述终端返回的第二电路域寻呼请求的响应消息, 若 接收到, 则执行步骤 412或者步骤 41 若否, 则执行步骤 413。
所述设定第二时长可以是指从开启第二定时器开始计时, 计数数值到达 设定数值结束的这一段时长, 所述第二时长小于所述第一时长。
例如, 所述第一时长为 8秒, 所述第二时长为 6秒, 这里不做限定。 具体地, 在步骤 411中, 所述 MME在向所述终端发起第二次寻呼后, 需 要等待一段时间接收所述终端的响应消息 (例如: Extend Service Request消 息), 此时启动第二定时器, 所述 MME可以对接收所述终端的响应消息的时 间进行检测, 避免了超时等待, 还能及时确定所述终端是否处于异常状态。
步骤 412: 所述 MME在发送所述第二电路域寻呼请求后的第二时间段内 收到所述终端对所述第二电路域寻呼请求的接受响应消息,向所述 eNodeB发 送用于指示对所述终端进行电路域回落的指示消息。
该指示消息指示所述终端回落至目标网络, 建立电路域连接完成语音通 话。
例如,所述接受响应消息可以为 Extended Service Request消息,所述 MME 在确定所述终端响应来自 CS域的呼叫时, 向所述所述 eNodeB发送包含了 UE Radio Capabilities参数和 CS Fallback Indicator参数的 Initial Context Setup Request消息, 指示所述 eNodeB将所述终端回落到目标电路域网络, 并接收 所述 eNodeB返回的 Initial Context Setup Request消息。 一次对终端的寻呼操作, 能够提高终端语音呼叫成功率。
步骤 4127:所述 MME在设定时长内接收到所述终端对所述第二电路域寻 呼请求的拒绝响应消息, 所述 MME向所述终端所属的 MSC发送寻呼失败消 息。 寻呼失败消息中可以包括失败原因为用户拒绝 CS呼叫。
例如, 所述拒绝响应消息可以为 Extended Service Request消息, 当所述 MME接收到的 Extended Service Request消息中携带了拒绝响应指令 (例如: Paging Reject指令)。
可选地,在执行步骤 412或者步骤 之前,还可以所述 MME还可以进 一步判断所述电路域寻呼通知响应消息中是否包含了拒绝来自 CS 域的呼叫 的指令, 若包含了拒绝指令, 则执行步骤 41 否则, 执行步骤 412, 具体方 式与本发明实例二中步骤 209〜步骤 211的方式相同, 这里不做赘述。
步骤 413: 所述 MME在发送所述第二电路域寻呼请求后的第二时间段内 未收到所述终端对所述第二电路域寻呼请求的响应消息, 向所述终端所属的 移动交换中心 MSC发送寻呼失败消息。
具体地,在步骤 413中,所述 MME在所述第二定时器定时到达设定第二 时长时未接收到所述终端返回的所述第二电路域寻呼请求的响应消息, 向所 述终端所属的移动交换中心 MSC发送寻呼失败消息。
在向所述 MSC发送的寻呼失败消息中可以包含失败原因为 UE 不可达 ( UE unreachable )。
所述 MSC在接收到所述 MME发送的寻呼失败消息时, 暂停前转等待操 作, 前转至 Iu/A接口发起对所述终端的语音呼叫业务。
所述 MSC还可以重新发起对所述终端的语音呼叫业务。
步骤 414: 所述 MME在所述第一定时器计时到达设定第一时长时接收到 所述终端返回的所述电路域寻呼通知响应消息, 判断所述终端是否响应来自 CS域的呼叫, 若同意响应, 则执行步骤 415; 若拒绝响应, 则向 MSC发送拒 绝响应呼叫消息, 结束 CS域呼叫操作。
在步骤 414 中, 所述电路域寻呼通知响应消息可以为 Extended Service Request消息。
其中, 终端根据携带在第一电路域寻呼请求中的主叫终端标识, 确定是 否响应本次 CS域的语音呼叫。
例如: 终端根据 Caller Line Identification, 判断是否响应来自 CS域的呼 叫 , 并将电路域寻呼通知响应消息发送给所述 MME。
当所述 MME接收到的 Extended Service Request消息中携带了同意响应信 息时, 执行步骤 415; 当所述 MME接收到的 Extended Service Request消息中 携带了拒绝响应信息时, 所述 MME 发送拒绝响应消息 (例如: SGsAP-PAGING-REJECT )给所述终端所属的 MSC , 结束 CS域呼叫操作。
步骤 415: 所述 MME在确定所述终端响应来自 CS域的呼叫时, 指示所 述终端当前接入的基站将所述终端回落到目标电路域网络, 建立电路域连接 完成语音通话。
所述 MME在确定所述终端响应来自 CS域的呼叫时,向所述所述 eNodeB 发送包含了 UE Radio Capabilities参数和 CS Fallback Indicator参数的 Initial Context Setup Request消息, 指示所述 eNodeB将所述终端回落到目标电路域 网络, 并接收所述 eNodeB返回的 Initial Context Setup Request消息。
通过本发明实施例四的方案 , MME在所述第一定时器计时到达设定第一 时长时未接收到所述终端返回的电路域寻呼通知响应消息, 能够及时判断出 当前终端出现异常, 额外增加一次对终端的寻呼操作, 启动第二定时器, 并 在所述第二定时器定时到达设定第二时长时未接收到所述终端返回的所述第 二电路域寻呼请求的响应消息, 向所述终端所属的移动交换中心 MSC发送寻 呼失败消息, 以使所述 MSC暂停前转等待操作; 以及在所述第二定时器定时 到达设定第二时长时接收到所述终端返回的所述第二电路域寻呼请求的响应 消息, 向所述 eNodeB发送用于指示对所述终端进行电路域回落的指示消息, 使得所述终端回落至目标网络, 实现语音呼叫, 额外增加一次对终端的寻呼 操作, 不仅能够使得终端出现异常时及时通知所述 MSC暂停前转等待操作, 节省了网络资源; 而且增加了一次终端被寻呼的机会, 提高了终端语音呼叫 的成功率。
实施例五:
如图 5所示,为本发明实施例五的一种移动性管理实体 MME设备的结构 示意图, 本发明实施例五是与本发明实施例一〜实施例四在同一发明构思下的 设备, 所述设备包括: 收发单元 11和处理单元 12, 其中:
收发单元 11 ,用于接收移动交换中心 MSC发送的用于指示终端回落到电 路域的第一电路域寻呼请求;
处理单元 12, 用于在所述接收单元收到所述第一电路域寻呼请求后确定 所述终端处于连接态;
所述收发单元 11 , 还用于根据所述接收单元接收的第一电路域寻呼请求 以及所述处理单元确定所述终端处于连接态, 向所述终端发送电路域寻呼通 知; 所述收发单元 11 , 还用于与演进基站 eNodeB通信;
所述处理单元 12, 还用于通过所述收发单元与所述 eNodeB通信, 将所 述终端的状态变迁为空闲态;
所述收发单元 11 , 还用于根据所述收发单元接收的所述第一电路域寻呼 请求以及所述处理单元将所述终端的状态变迁为空闲态, 向所述终端发送第 二电路域寻呼请求。
具体地, 所述处理单元 12, 用于根据所述收发单元发送所述电路域寻呼 通知后的第一时间段后未收到所述终端对所述电路域寻呼通知的响应消息, 确定所述终端未正常响应所述电路域寻呼通知。
具体地, 所述收发单元 11 , 还用于在发送所述电路域寻呼通知后的第一 时间段之内接收所述 eNodeB发送的所述终端的连接上下文释放请求; 所述处理单元 12, 用于根据所述收发单元接收的所述连接上下文释放请 求, 确定所述终端未正常响应所述电路域寻呼通知。
具体地, 所述收发单元 11 , 用于向所述 eNodeB发送所述终端的连接上 下文释放命令;
所述收发单元 11 , 用于接收所述 eNodeB发送的所述终端的连接上下文 完成消息;
所述处理单元 12, 用于将所述终端的状态变迁为空闲态。
具体地, 所述收发单元 12, 用于根据发送所述第二电路域寻呼请求后的 第二时间段后未收到所述终端对所述第二电路域寻呼请求的响应消息, 向所 述 MSC发送寻呼失败消息。
或者, 所述收发单元, 用于在发送所述第二电路域寻呼请求后的第二时 间段内收到所述终端对所述第二电路域寻呼请求的拒绝响应消息;
所述收发单元, 用于向所述 MSC发送寻呼失败消息。
具体地, 所述收发单元 12, 用于在发送所述第二电路域寻呼请求后的第 二时间段内接收所述终端对所述第二电路域寻呼请求的响应消息;
所述收发单元 12, 用于向所述 eNodeB发送用于指示对所述终端进行电 路域回落的指示消息。
具体地, 所述处理单元 12, 用于查询所述终端的状态, 根据查询结果, 确定所述终端处于连接态。
需要说明的是, 本发明实施例五所述的设备可以是本发明实施例一至实 施例四的执行主体移动性管理实体 MME的实体设备,还可以是移动性管理实 体中的逻辑单元, 还可以是集成在网络侧其他设备中的逻辑部件, 这里不做 限定。
实施例六:
如图 6所示, 为本发明实施例六的一种用于呼叫处理的设备的结构示意 图, 本发明实施例六是与本发明实施例一〜实施例四在同一发明构思下的设 备, 所述设备包括: 收发机 21和处理器 22, 其中, 收发机 21和处理器 22通 过总线 23连接。
具体地,所述收发机 21 ,用于接收移动交换中心 MSC发送的用于指示终 端回落到电路域的第一电路域寻呼请求;
所述处理器 22, 用于在所述收发机接收到所述第一电路域寻呼请求后确 定所述终端处于连接态;
所述收发机 21 , 还用于根据所述收发机接收的第一电路域寻呼请求以及 所述处理器确定所述终端处于连接态, 向所述终端发送电路域寻呼通知; 所述收发机 21 , 还用于与演进基站 eNodeB通信;
所述处理器 22, 还用于通过所述收发机与所述 eNodeB通信, 将所述终 端的状态变迁为空闲态;
所述收发机 21 , 还用于根据所述收发机接收的所述第一电路域寻呼请求 以及所述处理器将所述终端的状态变迁为空闲态, 向所述终端发送第二电路 域寻呼请求。
具体地, 所述处理器 22, 用于根据所述收发机发送所述电路域寻呼通知 后的第一时间段后未收到所述终端对所述电路域寻呼通知的响应消息, 确定 所述终端未正常响应所述电路域寻呼通知。
具体地, 所述收发机 21 , 还用于在发送所述电路域寻呼通知后的第一时 间段之内接收所述 eNodeB发送的所述终端的连接上下文释放请求;
所述处理器 22, 用于根据所述收发机接收的所述连接上下文释放请求, 确定所述终端未正常响应所述电路域寻呼通知。
具体地, 所述收发机 21 , 用于向所述 eNodeB发送所述终端的连接上下 文释放命令;
所述收发机 21 , 用于接收所述 eNodeB发送的所述终端的连接上下文完 成消息;
所述处理器 22, 用于将所述终端的状态变迁为空闲态。
具体地, 所述收发机 21 , 用于根据发送所述第二电路域寻呼请求后的第 二时间段后未收到所述终端对所述第二电路域寻呼请求的响应消息, 向所述
MSC发送寻呼失败消息。
具体地, 所述收发机 21 , 用于在发送所述第二电路域寻呼请求后的第二 时间段内接收所述终端对所述第二电路域寻呼请求的接受响应消息;
所述收发机 21 , 用于向所述 eNodeB发送用于指示对所述终端进行电路 域回落的指示消息。
或者, 所述收发机 21 , 用于在发送所述第二电路域寻呼请求后的第二时 间段内收到所述终端对所述第二电路域寻呼请求的拒绝响应消息;
所述收发机 21 , 用于向所述 MSC发送寻呼失败消息。
具体地, 所述处理器 22, 用于查询所述终端的状态, 根据查询结果, 确 定所述终端处于连接态。
需要说明的是, 本发明实施例六所述的设备可以是本发明实施例一至实 施例四的执行主体移动性管理实体的实体设备, 还可以是移动性管理实体中 的逻辑单元, 还可以是集成在网络侧其他设备中的逻辑部件, 这里不做限定。
本领域的技术人员应明白,本发明的实施例可提供为方法、装置(设备)、 或计算机程序产品。 因此, 本发明可釆用完全硬件实施例、 完全软件实施例、 或结合软件和硬件方面的实施例的形式。 而且, 本发明可釆用在一个或多个 其中包含有计算机可用程序代码的计算机可用存储介质 (包括但不限于磁盘 存储器、 CD-ROM、 光学存储器等)上实施的计算机程序产品的形式。
本发明是参照根据本发明实施例的方法、 装置 (设备)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指定的功能的装置。
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指定的功能。
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指定的功能的步骤。
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。 发明的精神和范围。 这样, 倘若本发明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

权 利 要 求
1、 一种呼叫处理方法, 其特征在于, 包括:
移动管理实体 MME接收移动交换中心 MSC发送的用于指示终端回落到 电路域的第一电路域寻呼请求;
所述 MME确定所述终端处于连接态,根据所述第一电路域寻呼请求,所 述 MME向所述终端发送电路域寻呼通知;
所述 MME确定所述终端未正常响应所述电路域寻呼通知;
所述 MME通过与演进基站 eNodeB通信将所述终端的状态变迁为空闲 态;
所述 MME根据所述第一电路域寻呼请求 ,向所述终端发送第二电路域寻 呼请求。
2、 根据权利要求 1所述的方法, 其特征在于, 所述 MME确定所述终端 未正常响应所述电路域寻呼通知, 包括:
所述 MME根据发送所述电路域寻呼通知后的第一时间段后未收到所述 终端对所述电路域寻呼通知的响应消息, 确定所述终端未正常响应所述电路 域寻呼通知。
3、 根据权利要求 1所述的方法, 其特征在于, 所述 MME确定所述终端 未正常响应所述电路域寻呼通知, 包括:
所述 MME根据在发送所述电路域寻呼通知后的第一时间段之内所述 MME接收到所述 eNodeB发送的所述终端的连接上下文释放请求, 确定所述 终端未正常响应所述电路域寻呼通知。
4、 根据权利要求 2或 3所述的方法, 其特征在于, 所述 MME通过与演 进基站 eNodeB通信将所述终端的状态变迁为空闲态, 包括:
所述 MME向所述 eNodeB发送所述终端的连接上下文释放命令; 所述 MME接收所述 eNodeB发送的所述终端的连接上下文完成消息; 所述 MME将所述终端的状态变迁为空闲态。
5、 根据权利要求 1~4任一所述的方法, 其特征在于, 还包括: 所述 MME根据发送所述第二电路域寻呼请求后的第二时间段后未收到 所述终端对所述第二电路域寻呼请求的响应消息, 向所述 MSC发送寻呼失败 消息。
6、 根据权利要求 1~4任一所述的方法, 其特征在于, 还包括:
所述 MME在发送所述第二电路域寻呼请求后的第二时间段内收到所述 终端对所述第二电路域寻呼请求的接受响应消息;
所述 MME向所述 eNodeB发送用于指示对所述终端进行电路域回落的指 示消息。
7、 根据权利要求 1~4任一所述的方法, 其特征在于, 还包括:
所述 MME在发送所述第二电路域寻呼请求后的第二时间段内收到所述 终端对所述第二电路域寻呼请求的拒绝响应消息;
所述 MME向所述 MSC发送寻呼失败消息。
8、 如权利要求 1~7任一所述的方法, 其特征在于, 所述 MME确定所述 终端处于连接态, 包括:
所述 MME查询所述终端的状态,根据查询结果,确定所述终端处于连接 态。
9、 一种移动管理实体 MME, 其特征在于, 包括:
收发单元,用于接收移动交换中心 MSC发送的用于指示终端回落到电路 域的第一电路域寻呼请求;
处理单元, 用于在所述接收单元收到所述第一电路域寻呼请求后确定所 述终端处于连接态;
所述收发单元, 还用于根据所述接收单元接收的第一电路域寻呼请求以 及所述处理单元确定所述终端处于连接态, 向所述终端发送电路域寻呼通知; 所述收发单元, 还用于与演进基站 eNodeB通信;
所述处理单元,还用于通过所述收发单元与所述 eNodeB通信,将所述终 端的状态变迁为空闲态; 所述收发单元, 还用于根据所述收发单元接收的所述第一电路域寻呼请 电路域寻呼请求。
10、 根据权利要求 9所述的 MME, 其特征在于,
所述处理单元, 用于根据所述收发单元发送所述电路域寻呼通知后的第 一时间段后未收到所述终端对所述电路域寻呼通知的响应消息, 确定所述终 端未正常响应所述电路域寻呼通知。
11、 根据权利要求 9所述的 MME, 其特征在于,
所述收发单元, 还用于在发送所述电路域寻呼通知后的第一时间段之内 接收所述 eNodeB发送的所述终端的连接上下文释放请求;
所述处理单元, 用于根据所述收发单元接收的所述连接上下文释放请求, 确定所述终端未正常响应所述电路域寻呼通知。
12、 根据权利要求 10或 11所述的 MME, 其特征在于,
所述收发单元, 用于向所述 eNodeB 发送所述终端的连接上下文释放命 令;
所述收发单元,用于接收所述 eNodeB发送的所述终端的连接上下文完成 消息;
所述处理单元, 用于将所述终端的状态变迁为空闲态。
13、 根据权利要求 9~12任一所述的 MME, 其特征在于,
所述收发单元, 用于根据发送所述第二电路域寻呼请求后的第二时间段 后未收到所述终端对所述第二电路域寻呼请求的响应消息, 向所述 MSC发送 寻呼失败消息。
14、 根据权利要求 9~12任一所述的 MME, 其特征在于,
所述收发单元, 用于在发送所述第二电路域寻呼请求后的第二时间段内 接收所述终端对所述第二电路域寻呼请求的接受响应消息;
所述收发单元,用于向所述 eNodeB发送用于指示对所述终端进行电路域 回落的指示消息。
15、 根据权利要求 9~12任一所述的方法, 其特征在于, 还包括: 所述收发单元, 用于在发送所述第二电路域寻呼请求后的第二时间段内 收到所述终端对所述第二电路域寻呼请求的拒绝响应消息;
所述收发单元, 用于向所述 MSC发送寻呼失败消息。
16、 如权利要求 9~15任一所述的 MME, 其特征在于,
所述处理单元, 用于查询所述终端的状态, 根据查询结果, 确定所述终 端处于连接态。
17、 一种用于呼叫处理的设备, 其特征在于, 包括: 处理器和收发机, 其中,
所述收发机,用于接收移动交换中心 MSC发送的用于指示终端回落到电 路域的第一电路域寻呼请求;
所述处理器, 用于在所述收发机接收到所述第一电路域寻呼请求后确定 所述终端处于连接态;
所述收发机, 还用于根据所述收发机接收的第一电路域寻呼请求以及所 述处理器确定所述终端处于连接态, 向所述终端发送电路域寻呼通知; 所述收发机, 还用于与演进基站 eNodeB通信;
所述处理器,还用于通过所述收发机与所述 eNodeB通信,将所述终端的 状态变迁为空闲态;
所述收发机, 还用于根据所述收发机接收的所述第一电路域寻呼请求以 及所述处理器将所述终端的状态变迁为空闲态, 向所述终端发送第二电路域 寻呼请求。
18、 根据权利要求 17所述的设备, 其特征在于,
所述处理器, 用于根据所述收发机发送所述电路域寻呼通知后的第一时 间段后未收到所述终端对所述电路域寻呼通知的响应消息, 确定所述终端未 正常响应所述电路域寻呼通知。
19、 根据权利要求 17所述的设备, 其特征在于, 所述收发机, 还用于在发送所述电路域寻呼通知后的第一时间段之内接 收所述 eNodeB发送的所述终端的连接上下文释放请求;
所述处理器, 用于根据所述收发机接收的所述连接上下文释放请求, 确 定所述终端未正常响应所述电路域寻呼通知。
20、 根据权利要求 18或 19所述的设备, 其特征在于,
所述收发机, 用于向所述 eNodeB发送所述终端的连接上下文释放命令; 所述收发机,用于接收所述 eNodeB发送的所述终端的连接上下文完成消 息;
所述处理器, 用于将所述终端的状态变迁为空闲态。
21、 根据权利要求 17~20任一所述的设备, 其特征在于,
所述收发机, 用于根据发送所述第二电路域寻呼请求后的第二时间段后 未收到所述终端对所述第二电路域寻呼请求的响应消息, 向所述 MSC发送寻 呼失败消息。
22、 根据权利要求 17~20任一所述的设备, 其特征在于,
所述收发机, 用于在发送所述第二电路域寻呼请求后的第二时间段内接 收所述终端对所述第二电路域寻呼请求的接受响应消息;
所述收发机,用于向所述 eNodeB发送用于指示对所述终端进行电路域回 落的指示消息。
23、 根据权利要求 17~20任一所述的方法, 其特征在于, 还包括: 所述收发机, 用于在发送所述第二电路域寻呼请求后的第二时间段内收 到所述终端对所述第二电路域寻呼请求的拒绝响应消息;
所述收发机, 用于向所述 MSC发送寻呼失败消息。
24、 如权利要求 18~23任一所述的设备, 其特征在于,
所述处理器, 用于查询所述终端的状态, 根据查询结果, 确定所述终端 处于连接态。
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