CN112738854B - Voice switching method and device - Google Patents
Voice switching method and device Download PDFInfo
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- CN112738854B CN112738854B CN201910975081.XA CN201910975081A CN112738854B CN 112738854 B CN112738854 B CN 112738854B CN 201910975081 A CN201910975081 A CN 201910975081A CN 112738854 B CN112738854 B CN 112738854B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/14—Reselecting a network or an air interface
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
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Abstract
The invention provides a voice switching method and a voice switching device. The method comprises the following steps: under the condition that a wireless resource management system receives an E-RAB establishment request message initiated by a terminal and needs to establish QCI1 bearer, judging whether the terminal reports an A2 measurement report; the A2 measurement report is a measurement report indicating that the weak coverage rejects the QCI1 bearer establishment; when the terminal reports an A2 measurement report and the first switch is in a starting state, judging whether a target cell accessed by the terminal has a cell with a neighboring cell relation; when a target cell has a cell with a neighbor cell relation, sending a message for rejecting the establishment of the QCI1 bearer to a terminal; under the condition that a voice/data A2 report reported by the terminal is received and the second switch is in an activated state, configuring a voice B2 measurement event for the terminal; and when the voice B2 measurement event configuration is successful, executing a circuit domain fallback flow to the terminal. The invention can improve the success rate of the Volte call and the handover in the weak coverage scene.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a voice switching method and apparatus.
Background
Currently, Voice over Long Term Evolution (LTE) commercial networks support the Enhanced Single Radio Voice Call Continuity (srvcc) function, and if the LTE Signal RSRP (Reference Signal Receiving Power) is low, the LTE network is switched to a 2G (2-Generation Wireless Telephone Technology, second-Generation mobile communication Technology) network during the Voice Call established by the QCI1(Qos Class Identifier). However, there may be a weak coverage when QCI1 is not established yet at the time of call origination, and it is specified In the protocol that at this time, the core network needs to be switched to the 2G network through SRVCC (SRVCC In Alerting Phase) and bsvcc (SRVCC Before Ringing ). However, core network devices in the VoLTE commercial network do not support aSRVCC and bsrvvcc. Also, SIP (Session Initiation Protocol) signaling over QCI5 may fail to be transmitted in the weak coverage area, resulting in call failure. In order to solve the problem, the base station needs to be able to actively reject the establishment of QCI1 under the condition of weak coverage, the core network sends 503 messages to the VoLTE terminal through the IMS after receiving the rejection message established by QCI1, the terminal automatically sends ESR (Extended supported Release, long-term Support version) to the network, and a CSFB (Circuit Switched Fallback, Circuit domain Fallback) process is triggered to drop voice to 2G for carrying, so as to ensure voice quality.
At present, the commonly used schemes for circuit switched fallback include the following:
1. CSFB and dual standby schemes, wherein 2/3G (3rd-Generation, third Generation mobile communication technology) circuit domain provides voice, VoLTE scheme provides voice from LTE packet domain, and SRVCC function ensures smooth handover with 2/3G voice.
2. The CSFB is implemented by using an interface between an MME (Mobility Management Entity) and an MSC (Mi rat communication system) server, where the interface can complete operations such as EPS and IMSI (International Mobile Subscriber Identity) joint attachment, location update, paging, and the like of a UE (User Equipment)
3. When the CSFB user is a calling party: the terminal firstly executes EPS (Evolved Packet System) and IMSI joint attachment, when UE initiates paging, LTE terminal transfers to 3G/2G to initiate call under the assistance of eNode B (Evolved Node B).
4. When the CSFB user is called: when the terminal calls for connection, the paging message reaches the LTE terminal through the LTE wireless interface. The LTE terminal is switched to 3G/2G under the assistance of the eNode B to complete the follow-up call connection.
According to the circuit switched fallback scheme, when a user resides in an LTE network, if the user needs to initiate or receive a call, the user needs to switch from an LTE mode back to a 2G network to complete a call. The main disadvantage of this approach is that the problem of providing voice service by LTE is not solved essentially, and whenever a user needs voice service, the service of the user under the LTE network needs to be interrupted, switched or suspended, thereby affecting the user experience.
Disclosure of Invention
The embodiment of the invention provides a voice switching method and a voice switching device, which are used for solving the problems that in the prior art, voice services provided by LTE are not essentially solved, and when a user needs the voice services, the services of the user in an LTE network need to be interrupted, switched or suspended, so that the user experience is influenced.
In order to solve the above problem, an embodiment of the present invention discloses a voice switching method, including:
under the condition that a wireless resource management system receives an E-RAB establishment request message initiated by a terminal and needs to establish a QCI1 bearer, judging whether the terminal reports an A2 measurement report; the A2 measurement report is a measurement report indicating that weak coverage rejects QCI1 bearer establishment;
under the condition that the terminal reports an A2 measurement report and a first switch is in a starting state, judging whether a target cell accessed by the terminal has a cell with a neighboring cell relation; the first switch is a switch used for indicating that the QCI1 is refused to be established when the call is started in weak coverage;
under the condition that the target cell has a cell with a neighbor cell relation, sending a message of rejecting the establishment of the QCI1 bearer to the terminal;
under the condition that a voice/data A2 report reported by the terminal is received and a second switch is in an activated state, configuring a voice B2 measurement event for the terminal; the second switch is a switch for indicating the delay switching of the weak field call;
and when the voice B2 measurement event configuration is successful, executing a circuit domain fallback flow to the terminal.
Preferably, after the step of determining whether the terminal has reported an a2 measurement report, the method further includes:
under the condition that the first switch is in a closed state and the terminal does not report the A2 measurement report, judging whether the terminal reports a voice A2 report/data A2 report or not;
under the condition that the terminal reports the voice A2 report or the terminal reports the data A2 report, sending a reconfiguration message for establishing QCI1 to the terminal, and configuring a different system voice B2 measurement event for the terminal;
starting the first switch under the condition that a reconfiguration response message returned by the terminal is not received and an A2 measurement report of a weak field originating call of the terminal is received;
and under the condition that the target cell accessed by the terminal has the cell with the adjacent cell relation, replying an E-RAB establishment response message to the mobility management entity.
Preferably, the step of configuring a voice B2 measurement event for the terminal when the voice/data a2 report reported by the terminal is received and the second switch is in an activated state includes:
judging the current state of the terminal under the condition that a voice/data A2 report reported by the terminal is received and a second switch is in a starting state;
and when the current state is a state capable of performing voice service continuity, configuring the voice B2 measurement event.
Preferably, after the step of determining the current state of the terminal, the method further includes:
when the current state is a state that voice service continuity can not be carried out, starting a switching delay timer;
in case the handover delay timer expires and the terminal is not configured with a voice B2 measurement event, checking whether a voice/data a2 measurement report is received;
modifying the state of the terminal to a state in which voice service continuity can be performed in the case that the voice/data a2 measurement report is received;
the terminal is configured with a voice B2 measurement event.
Preferably, after the step of configuring the voice B2 measurement event for the terminal, the method further includes:
deleting the QCI1 bearer of the terminal, or reconfiguring the QCI1 bearer of the terminal into a non-QCI 1 bearer;
modifying the state of the terminal into a state that the voice service continuity can not be carried out;
checking an operation state of the handover delay timer;
stopping the handover delay timer when the handover delay timer is in an active state.
Preferably, the method further comprises:
generating corresponding alarm information under the condition that any one of the processes fails;
and sending the alarm information to a mobility management entity.
In order to solve the above problem, an embodiment of the present invention discloses a voice switching apparatus, including:
a2 measurement report determining module, configured to determine, when the radio resource management system receives an E-RAB establishment request message initiated by a terminal and a QCI1 bearer needs to be established, whether the terminal has reported an a2 measurement report; the A2 measurement report is a measurement report indicating that weak coverage rejects QCI1 bearer establishment;
a neighboring cell relation determining module, configured to determine whether a cell with a neighboring cell relation exists in a target cell to which the terminal is connected, when the terminal has reported an a2 measurement report and the first switch is in a start state; the first switch is a switch used for indicating that the QCI1 is refused to be established when the call is started in weak coverage;
a reject bearer sending module, configured to send, to the terminal, a message for rejecting the QCI1 bearer establishment when the target cell has a cell with a neighboring cell relationship;
a voice B2 event configuration module, configured to configure a voice B2 measurement event for the terminal when a voice/data a2 report reported by the terminal is received and a second switch is in an activated state; the second switch is a switch for indicating the delay switching of the weak field call;
and the circuit domain fallback execution module is configured to execute a circuit domain fallback procedure on the terminal when the voice B2 measurement event configuration is successful.
Preferably, the method further comprises the following steps:
an a2 report judgment module, configured to, when the first switch is in an off state and the terminal has not reported the a2 measurement report, judge whether the terminal has reported a voice a2 report/a data a2 report;
a B2 measurement event configuration module, configured to send a reconfiguration message for establishing QCI1 to the terminal when the terminal has reported the voice a2 report or the terminal has reported the data a2 report, and configure a different-system voice B2 measurement event for the terminal;
the first switch starting module is used for starting the first switch under the condition that a reconfiguration response message returned by the terminal is not received and an A2 measurement report of a weak field originating call of the terminal is received;
and the response message replying module is used for replying the E-RAB establishment response message to the mobility management entity under the condition that the target cell accessed by the terminal has the cell with the adjacent cell relation.
Preferably, the voice B2 event configuration module includes:
the current state judgment submodule is used for judging the current state of the terminal under the condition that a voice/data A2 report reported by the terminal is received and the second switch is in a starting state;
a voice B2 event configuration sub-module, configured to configure the voice B2 measurement event when the current state is a state in which voice service continuity can be performed.
Preferably, the method further comprises the following steps:
a delay timer starting module, configured to start a switching delay timer when the current state is a state in which voice service continuity cannot be performed;
an a2 measurement report checking module for checking whether a voice/data a2 measurement report is received if the handover delay timer is expired and the terminal is not configured with a voice B2 measurement event;
a first terminal state modification module, configured to modify a state of the terminal to a state in which voice service continuity is possible, in a case where a voice/data a2 measurement report is received;
a voice B2 event configuration module for configuring a voice B2 measurement event for the terminal.
Preferably, the method further comprises the following steps:
a QCI1 bearer deleting module, configured to delete the QCI1 bearer of the terminal, or reconfigure the QCI1 bearer of the terminal to be a non-QCI 1 bearer;
the second terminal state modifying module is used for modifying the state of the terminal into a state that the voice service continuity can not be carried out;
a running state checking module for checking the running state of the switching delay timer;
a delay timer stopping module, configured to stop the handover delay timer when the handover delay timer is in a running state.
Preferably, the apparatus further comprises:
the warning information generating module is used for generating corresponding warning information under the condition that any one process fails;
and the alarm information sending module is used for sending the alarm information to a mobility management entity.
Compared with the prior art, the embodiment of the invention has the following advantages:
the embodiment of the invention provides a voice switching scheme, which comprises the steps of judging whether a terminal reports an A2 measurement report or not when a radio resource management system receives an E-RAB establishment request message initiated by the terminal and needs to establish a QCI1 bearer, judging whether the terminal reports the A2 measurement report or not when the A2 measurement report is a measurement report indicating that weak coverage rejects the establishment of the QCI1 bearer, judging whether a target cell accessed by the terminal has a cell with a neighboring cell relation or not when the terminal reports the A2 measurement report and a first switch is in a starting state, sending a message for rejecting the establishment of the QCI1 when the target cell calls the weak coverage, sending a message for rejecting the establishment of the QCI1 bearer to the terminal when the target cell has the cell with the neighboring cell relation, configuring a voice B2 measurement event for the terminal when the voice/data A2 report reported by the terminal is received and a second switch is in the starting state, the second switch is a switch for indicating the delay switching of the call from the weak field, and when the voice B2 measurement event configuration is successful, the circuit domain fallback flow is executed for the terminal. According to the embodiment of the invention, by adding the switch for refusing the establishment of the QCI1 when starting the call in the weak coverage and the delay switch, when a user is in the weak coverage scene and dials a voice call, the establishment time of the QCI is optimized, so that the Volte call and the switching success rate in the weak coverage scene are improved.
Drawings
Fig. 1 is a flowchart illustrating steps of a voice switching method according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating steps of a voice switching method according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a voice switching apparatus according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a voice switching apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Currently, the adopted weak field origination scheme is a CSFB scheme, which: the view is that, in the initial stage of LTE deployment, an operator mainly provides a broadband data service, and a voice service may utilize a conventional GSM (Global System for Mobile Communication) network, and since the GSM network has a high coverage rate and is optimized for a long time, a user may still obtain a high-quality voice service in the initial stage of LTE deployment. Under the guidance of this strategy, 3GPP (3rd Generation Partnership Project) has developed CSFB technology, and when a user camps on an LTE network, the user needs to switch back to a 2G network from an LTE mode to complete a call if the user needs to initiate or receive a call. The main disadvantage of this approach is that the problem of providing voice service by LTE is not solved essentially, and whenever a user needs voice service, the service of the user under the LTE network needs to be interrupted, switched or suspended, thereby affecting the user experience. Frequent mode switching between systems is triggered by voice traffic, so unlike the triggering conditions for intersystem handover in the conventional sense, such as handover to 2G systems due to poor LTE coverage, this problem cannot be ameliorated by optimization during the network deployment phase
SRVCC: this view is to provide voice over IP services directly over LTE, which is seen as the final solution by many operators. 3GPP has developed a Single Radio Voice Call Continuity (SRVCC) scheme for this deployment approach and interoperability strategy.
SRVCC mainly solves the problem of how to maintain Voice service continuity when a single radio UE moves between an LTE network and a 2G/3G network, that is, a single radio UE seamlessly switches between VoIP (Voice over Internet Protocol) Voice and CS (Circuit Switched) Voice controlled by IMS.
In order to solve the problems, the core concept of the invention is that: the method comprises the steps of adding a switch for rejecting the establishment of QCI1 when a call is initiated in a weak coverage mode, an A2 measurement event for rejecting the establishment of a voice bearer in the weak coverage mode, and a delay switch, wherein when a user is in a weak coverage scene and dials a voice call, the QCI establishment time is optimized, so that the Volte call and the switching success rate in the weak coverage scene are improved.
Example one
Referring to fig. 1, a flowchart illustrating steps of a voice switching method according to an embodiment of the present invention is shown, where the voice switching method specifically includes the following steps:
step 101: under the condition that a wireless resource management system receives an E-RAB establishment request message initiated by a terminal and needs to establish a QCI1 bearer, judging whether the terminal reports an A2 measurement report; the A2 measurement report is a measurement report indicating that weak coverage rejects QCI1 bearer establishment.
In the embodiment of the present invention, a Radio Resource Management (RRM) system aims to provide quality of service guarantee for a wireless user terminal in a network under a condition of limited bandwidth, and its basic starting point is to flexibly allocate and dynamically adjust available resources of a wireless transmission part and the network under the conditions of uneven traffic distribution of the network, fluctuating channel characteristics due to channel attenuation and interference, etc., so as to improve the utilization rate of a wireless spectrum to the maximum extent, prevent network congestion, and keep signaling load as small as possible. The research content of RRM mainly includes power control, channel allocation, scheduling, handover, access control, load control, adaptive code modulation, and so on.
An Evolved Radio Access Bearer (E-RAB) refers to a Bearer of a user plane, and is used for transmitting voice, data and multimedia services between a UE and a Core Network (CN).
After receiving the E-RAB establishment request message initiated by the terminal to the base station, the RRM may receive the E-RAB establishment request message and determine whether to establish the QCI1 bearer for the terminal according to the E-RAB establishment request message.
In case that the QCI1 bearer does not need to be established for the terminal, the implementation described below is not performed.
In the case that a QCI1 bearer needs to be established for the terminal, it may be determined whether the terminal has previously reported an a2 measurement report, and the a2 measurement report may apply a report indicating that the QCI1 bearer is rejected to be established for the terminal in a weak coverage scenario.
In case it is determined whether the terminal has reported an a2 measurement report, step 102 is performed.
Step 102: under the condition that the terminal reports an A2 measurement report and a first switch is in a starting state, judging whether a target cell accessed by the terminal has a cell with a neighboring cell relation; the first switch is a switch for indicating that the QCI1 is rejected when the call is initiated with weak coverage.
The first switch is a switch for indicating that the QCI1 is rejected to be established when the call is initiated in the weak coverage, i.e. the QCI1 is rejected to be established for the terminal in the weak coverage scenario.
When the terminal has reported an a2 measurement report, the operating state of the first switch preset in the base station can be judged.
The target cell refers to a cell under the base station to which the terminal needs to access.
When the first switch is in the starting state, the target cell to which the terminal needs to access can be obtained, and whether the target cell has a cell with a neighboring cell relation or not is checked.
After determining whether the target cell accessed by the terminal has a cell with a neighboring cell relationship, execute step 103.
Step 103: and under the condition that the target cell has a cell with a neighbor cell relation, sending a message of rejecting the establishment of the QCI1 bearer to the terminal.
When the target cell has a cell with a neighbor cell relation, a message for rejecting the QCI1 bearer establishment can be sent to the terminal.
Step 104 is performed after sending the message denying QCI1 bearer establishment to the terminal.
Step 104: under the condition that a voice/data A2 report reported by the terminal is received and a second switch is in an activated state, configuring a voice B2 measurement event for the terminal; the second switch is a switch for indicating that the call is delayed to be switched from a weak field.
The second switch is a switch for indicating the delayed switching of the call from the weak field, that is, the switch for delaying the call from the terminal in the environment of the terminal in the weak field signal.
The voice/data A2 report refers to a voice A2 report reported by the terminal or a data A2 report reported by the terminal after a message rejecting QCI1 bearer establishment is sent to the terminal.
The voice B2 measurement event refers to a voice measurement event for a serving cell below a certain threshold and a neighbor cell quality above a certain threshold for a same or lower priority inter-system cell.
When a message rejecting the QCI1 bearer establishment is sent to the terminal and a voice a2 report/data a2 report reported by the terminal is received, the operation state of the second switch can be judged.
With the second switch in the activated state, the terminal may be configured with a voice B2 measurement event.
After configuring the terminal with the voice B2 measurement event, step 105 is performed.
Step 105: and when the voice B2 measurement event configuration is successful, executing a circuit domain fallback flow to the terminal.
After the voice B2 configured for the terminal is successfully configured for the measurement event, a procedure of circuit domain fallback can be performed on the terminal, that is, the voice of the terminal is dropped onto the 2G bearer, so as to ensure the voice quality of the terminal.
The embodiment of the invention provides a voice switching method, which comprises the steps of judging whether a terminal reports an A2 measurement report or not when a radio resource management system receives an E-RAB establishment request message initiated by the terminal and needs to establish a QCI1 bearer, judging whether the terminal reports the A2 measurement report which indicates that weak coverage rejects the establishment of the QCI1 bearer, judging whether a target cell accessed by the terminal has a cell with a neighbor relation or not when the terminal reports the A2 measurement report and a first switch is in a starting state, wherein the first switch is a switch used for rejecting the establishment of the QCI1 when the terminal indicates that the weak coverage starts calling, sending a message rejecting the establishment of the QCI1 bearer to the terminal when the target cell has the cell with the neighbor relation, configuring a voice B2 measurement event for the terminal when the voice/data A2 report reported by the terminal is received and a second switch is in the starting state, the second switch is a switch for indicating the delay switching of the call from the weak field, and when the voice B2 measurement event configuration is successful, the circuit domain fallback flow is executed for the terminal. According to the embodiment of the invention, by adding the switch for refusing the establishment of the QCI1 when starting the call in the weak coverage and the delay switch, when a user is in the weak coverage scene and dials a voice call, the establishment time of the QCI is optimized, so that the Volte call and the switching success rate in the weak coverage scene are improved.
Example two
Referring to fig. 2, a flowchart illustrating steps of a voice switching method according to an embodiment of the present invention is shown, where the voice switching method specifically includes the following steps:
step 201: under the condition that a wireless resource management system receives an E-RAB establishment request message initiated by a terminal and needs to establish a QCI1 bearer, judging whether the terminal reports an A2 measurement report; the A2 measurement report is a measurement report indicating that weak coverage rejects QCI1 bearer establishment.
In the embodiment of the present invention, a Radio Resource Management (RRM) system aims to provide quality of service guarantee for a wireless user terminal in a network under a condition of limited bandwidth, and its basic starting point is to flexibly allocate and dynamically adjust available resources of a wireless transmission part and the network under the conditions of uneven traffic distribution of the network, fluctuating channel characteristics due to channel attenuation and interference, etc., so as to improve the utilization rate of a wireless spectrum to the maximum extent, prevent network congestion, and keep signaling load as small as possible. The research content of RRM mainly includes power control, channel allocation, scheduling, handover, access control, load control, adaptive code modulation, and so on.
An Evolved Radio Access Bearer (E-RAB) refers to a Bearer of a user plane, and is used for transmitting voice, data and multimedia services between a UE and a Core Network (CN).
After receiving the E-RAB establishment request message initiated by the terminal to the base station, the RRM may receive the E-RAB establishment request message and determine whether to establish the QCI1 bearer for the terminal according to the E-RAB establishment request message.
In case that the QCI1 bearer does not need to be established for the terminal, the implementation described below is not performed.
In the case that a QCI1 bearer needs to be established for the terminal, it may be determined whether the terminal has previously reported an a2 measurement report, and the a2 measurement report may apply a report indicating that the QCI1 bearer is rejected to be established for the terminal in a weak coverage scenario.
Step 202: and under the condition that the first switch is in a closed state and the terminal does not report the A2 measurement report, judging whether the terminal reports a voice A2 report/data A2 report.
The first switch is a switch for indicating that the QCI1 is rejected to be established when the call is initiated in the weak coverage, i.e. the QCI1 is rejected to be established for the terminal in the weak coverage scenario.
When the terminal has reported an a2 measurement report, the operating state of the first switch preset in the base station can be judged.
When the first switch is in the off state and the terminal does not report the a2 measurement report, it can be determined whether there is a voice a2 report from the terminal or a data a2 report from the base station, so as to determine whether the terminal has reported a voice a2 report/a data a2 report.
After determining whether the terminal has reported the voice a2 report/data a2 report, step 203 is executed.
Step 203: and under the condition that the terminal reports the voice A2 report or the terminal reports the data A2 report, sending a reconfiguration message for establishing QCI1 to the terminal, and configuring a different system voice B2 measurement event for the terminal.
When the base station stores the voice a2 report reported by the terminal or the data a2 report reported by the terminal, it may send a reconfiguration message for establishing QCI1 to the terminal.
After sending the reconfiguration message to the terminal to establish the QCI1, the terminal may be configured with a foreign system voice B2 measurement event.
After configuring the inter-system voice B2 measurement event for the terminal, step 204 is performed.
Step 204: and starting the first switch under the condition that the reconfiguration response message returned by the terminal is not received and an A2 measurement report of the weak-field originating call of the terminal is received.
After sending the rich execution message for establishing the QCI1 to the terminal, the ue may wait for receiving the reconfiguration response message returned by the terminal, and may activate the first switch when the reconfiguration response message returned by the terminal is not received and an a2 measurement report of a weak origination call initiated by the terminal to the base station is received.
After the first switch is activated, step 205 is performed.
Step 205: and under the condition that the target cell accessed by the terminal has the cell with the adjacent cell relation, replying an E-RAB establishment response message to the mobility management entity.
The target cell refers to a cell under the base station to which the terminal needs to access.
When the first switch is in the starting state, the target cell to which the terminal needs to access can be obtained, and whether the target cell has a cell with a neighboring cell relation or not is checked.
Mobility Management Entity (MME) is a key control node of a 3GPP protocol LTE access network, and is responsible for positioning of idle mode ue (user equipment) and paging process, including relaying, and simply, the MME is responsible for signaling processing. It involves the bearer activation/deactivation process and selects an sgw (serving gateway) for a UE when the UE initializes and connects. A user is authenticated by interacting with the HSS and is assigned a temporary ID. And the MME simultaneously supports interception and monitoring within the legal permission range. The MME provides a control function interface for the 2G/3G access network, and the interface is S3. The HSS-facing also provides an S6a interface for roaming UEs.
E-RAB (Evolved Radio Access Bearer). The E-RAB refers to a bearer of a User plane, and is used for transmitting voice, data, and multimedia services between a UE (User Equipment) and a CN (Core Network). E-RAB establishment is initiated by CN, when E-RAB establishment is successful, a basic service is established, UE enters into service using process.
When a target cell accessed by the terminal has a cell with a neighbor cell relation, an E-RAB establishment response message can be replied to the MME.
Step 206: under the condition that the terminal reports an A2 measurement report and a first switch is in a starting state, judging whether a target cell accessed by the terminal has a cell with a neighboring cell relation; the first switch is a switch for indicating that the QCI1 is rejected when the call is initiated with weak coverage.
The first switch is a switch for indicating that the QCI1 is rejected to be established when the call is initiated in the weak coverage, i.e. the QCI1 is rejected to be established for the terminal in the weak coverage scenario.
When the terminal has reported an a2 measurement report, the operating state of the first switch preset in the base station can be judged.
The target cell refers to a cell under the base station to which the terminal needs to access.
When the first switch is in the starting state, the target cell to which the terminal needs to access can be obtained, and whether the target cell has a cell with a neighboring cell relation or not is checked.
After determining whether the target cell accessed by the terminal has a cell with a neighboring cell relationship, step 207 is executed.
Step 207: and under the condition that the target cell has a cell with a neighbor cell relation, sending a message of rejecting the establishment of the QCI1 bearer to the terminal.
When the target cell has a cell with a neighbor cell relation, a message for rejecting the QCI1 bearer establishment can be sent to the terminal.
Step 208 is performed after sending the message to the terminal rejecting the QCI1 bearer establishment.
Step 208: under the condition that a voice/data A2 report reported by the terminal is received and a second switch is in an activated state, configuring a voice B2 measurement event for the terminal; the second switch is a switch for indicating that the call is delayed to be switched from a weak field.
The second switch is a switch for indicating the delayed switching of the call from the weak field, that is, the switch for delaying the call from the terminal in the environment of the terminal in the weak field signal.
The voice/data A2 report refers to a voice A2 report reported by the terminal or a data A2 report reported by the terminal after a message rejecting QCI1 bearer establishment is sent to the terminal.
When a message rejecting the QCI1 bearer establishment is sent to the terminal and a voice a2 report/data a2 report reported by the terminal is received, the operation state of the second switch can be judged.
The voice B2 measurement event refers to a voice measurement event for a serving cell below a certain threshold and a neighbor cell quality above a certain threshold for a same or lower priority inter-system cell.
With the second switch in the activated state, the terminal may be configured with a voice B2 measurement event.
With respect to the above process, it can be described in detail according to the following preferred embodiments.
In a preferred embodiment of the present invention, the step 208 may include:
substep A1: and under the condition that a voice/data A2 report reported by the terminal is received and the second switch is in a starting state, judging the current state of the terminal.
In the embodiment of the present invention, the current state refers to a state of whether the terminal can perform voice service continuity.
After the base station receives the voice a2 report reported by the terminal or the data a2 report reported by the terminal, the state of the second switch can be determined.
With the second switch in the activated state, the current state of the terminal may be determined, and then sub-step a2 is performed.
Substep A2: and when the current state is a state capable of performing voice service continuity, configuring the voice B2 measurement event.
When the current state of the terminal is a state in which voice service continuity is possible, a voice B2 measurement event may be configured for the terminal.
The switching delay timer may also be preset in the present invention, and specifically, the following detailed description is made in conjunction with the preferred embodiments.
In another preferred embodiment of the present invention, the method may further include:
step B1: and starting a switching delay timer when the current state is a state in which the voice service continuity can not be carried out.
In the embodiment of the present invention, the handover delay timer refers to a timer for delaying a terminal to perform voice handover, which is preset at the base station side.
When the current state of the terminal is the state in which the voice service continuity is not available, a preset handover delay timer may be started, and then step B2 is performed.
Step B2: in case the handover delay timer times out and the terminal has not configured a voice B2 measurement event, it is checked whether a voice/data a2 measurement report has been received.
After the handover delay timer times out, it may be checked whether the terminal has configured a voice B2 measurement event.
When the terminal has not configured the voice B2 measurement event, it may check whether the voice a2 measurement report/data a2 measurement report reported by the terminal is received, and then execute step B3.
Step B3: and in the case that the voice/data A2 measurement report is received, modifying the state of the terminal into a state in which voice service continuity can be performed.
When receiving the voice a2 measurement report/data a2 measurement report reported by the terminal, the state of the terminal may be modified to a state in which voice service continuity is possible.
After modifying the state of the terminal to a state in which voice service continuity is possible, step B4 is performed.
Step B4: the terminal is configured with a voice B2 measurement event.
After modifying the state of the terminal to a state where voice traffic continuity is possible, the terminal may be configured with a voice B2 measurement event.
The operational status of the handover delay timer may also be checked after configuring the terminal with a voice B2 measurement event, in particular as described in detail in connection with the preferred embodiments below.
In another preferred embodiment of the present invention, the method may further include:
step C1: deleting the QCI1 bearer of the terminal, or reconfiguring the QCI1 bearer of the terminal into a non-QCI 1 bearer.
In an embodiment of the present invention, after configuring the voice B2 measurement event for the terminal, the QCI1 bearer of the terminal may be deleted, or the QCI1 bearer of the terminal may be configured as a non-QCI 1 bearer.
After deleting the QCI1 bearer of the terminal or configuring the QCI1 bearer of the terminal as a non-QCI 1 bearer, step C2 is performed.
Step C2: and modifying the state of the terminal into a state in which the voice service continuity cannot be carried out.
After deleting the QCI1 bearer of the terminal or configuring the QCI1 bearer of the terminal as a non-QCI 1 bearer, the state of the terminal may be modified to a state in which voice service continuity is not possible.
After modifying the state of the terminal to a state where voice service continuity is not possible, step C3 is performed.
Step C3: checking an operational status of the handover delay timer.
After modifying the state of the terminal to a state where voice service continuity is not possible, the operation state of the handover delay timer may be checked.
After checking the operation state of the switching delay timer, step C4 is executed.
Step C4: stopping the handover delay timer when the handover delay timer is in an active state.
When the state of the switching delay timer is a stopped state, the flow is ended.
When the state of the switching delay timer is the operation state, the switching delay timer may be stopped, that is, the operation of the switching delay timer may be stopped.
After configuring the terminal with the voice B2 measurement event, step 209 is performed.
Step 209: and when the voice B2 measurement event configuration is successful, executing a circuit domain fallback flow to the terminal.
After the voice B2 configured for the terminal is successfully configured for the measurement event, a procedure of circuit domain fallback can be performed on the terminal, that is, the voice of the terminal is dropped onto the 2G bearer, so as to ensure the voice quality of the terminal.
After the voice B2 measures that the event configuration is successful and the cs fallback procedure is performed on the terminal, step 210 is performed.
Step 210: and generating corresponding alarm information under the condition that any one of the processes fails.
If the execution process fails, the alarm needs to be added correspondingly (if the original branch has no alarm), and no special treatment is carried out. For example: a failed timer start, a failed message transmission, a user in-process resulting in no instance, etc.
The alarm information refers to alarm information generated when any process fails, and corresponding alarm information can be generated when different execution processes fail, such as timer-started failure alarm information, message sending failure alarm information and the like.
After generating the corresponding alarm information, step 211 is performed.
Step 211: and sending the alarm information to a mobility management entity.
After the warning information is generated, the warning information can be sent to the MME, so that the MME can acquire a failure link of the execution process according to the warning information, repair the failure problem, and perform the circuit domain fallback flow after the repair is completed.
According to the invention, by adding the switch for refusing to establish the QCI1 when a call is initiated in a weak coverage mode and the delay switch, when a user is in a weak coverage scene and dials a voice call, the QCI establishment time is optimized, so that the Volte call and the switching success rate in the weak coverage scene are improved.
The embodiment of the invention provides a voice switching method, which comprises the steps of judging whether a terminal reports an A2 measurement report or not when a radio resource management system receives an E-RAB establishment request message initiated by the terminal and needs to establish a QCI1 bearer, judging whether the terminal reports the A2 measurement report which indicates that weak coverage rejects the establishment of the QCI1 bearer, judging whether a target cell accessed by the terminal has a cell with a neighbor relation or not when the terminal reports the A2 measurement report and a first switch is in a starting state, wherein the first switch is a switch used for rejecting the establishment of the QCI1 when the terminal indicates that the weak coverage starts calling, sending a message rejecting the establishment of the QCI1 bearer to the terminal when the target cell has the cell with the neighbor relation, configuring a voice B2 measurement event for the terminal when the voice/data A2 report reported by the terminal is received and a second switch is in the starting state, the second switch is a switch for indicating the delay switching of the call from the weak field, and when the voice B2 measurement event configuration is successful, the circuit domain fallback flow is executed for the terminal. According to the embodiment of the invention, by adding the switch for refusing the establishment of the QCI1 when starting the call in the weak coverage and the delay switch, when a user is in the weak coverage scene and dials a voice call, the establishment time of the QCI is optimized, so that the Volte call and the switching success rate in the weak coverage scene are improved.
EXAMPLE III
Referring to fig. 3, a schematic structural diagram of a voice switching apparatus provided in an embodiment of the present invention is shown, where the voice switching apparatus may specifically include the following modules:
a2 measurement report determining module 310, configured to determine, when the radio resource management system receives an E-RAB establishment request message initiated by a terminal and needs to establish a QCI1 bearer, whether the terminal has reported an a2 measurement report; the A2 measurement report is a measurement report indicating that weak coverage rejects QCI1 bearer establishment;
a neighboring cell relation determining module 320, configured to determine whether a cell with a neighboring cell relation exists in a target cell to which the terminal is connected, when the terminal has reported an a2 measurement report and the first switch is in a start state; the first switch is a switch used for indicating that the QCI1 is refused to be established when the call is started in weak coverage;
a reject bearer sending module 330, configured to send, to the terminal, a message for rejecting the QCI1 bearer establishment when the target cell has a cell with a neighboring cell relationship;
a voice B2 event configuration module 340, configured to configure a voice B2 measurement event for the terminal when the voice/data a2 report reported by the terminal is received and the second switch is in an activated state; the second switch is a switch for indicating the delay switching of the weak field call;
a cs fallback performing module 350, configured to perform a cs fallback procedure on the terminal when the configuration of the voice B2 measurement event is successful.
The embodiment of the invention provides a voice switching device, which judges whether a terminal reports an A2 measurement report or not when a radio resource management system receives an E-RAB establishment request message initiated by the terminal and needs to establish a QCI1 bearer, the A2 measurement report is a measurement report indicating that weak coverage rejects the establishment of the QCI1 bearer, judges whether a target cell accessed by the terminal has a cell with a neighboring cell relation or not when the terminal reports the A2 measurement report and a first switch is in a starting state, the first switch is a switch used for rejecting the establishment of the QCI1 when the weak coverage calls up, sends a message rejecting the establishment of the QCI1 bearer to the terminal when the target cell has the cell with the neighboring cell relation, and configures a voice/data A2 report reported by the terminal and a second switch is in the starting state for the terminal to configure a voice B2 measurement event, the second switch is a switch for indicating the delay switching of the call from the weak field, and when the voice B2 measurement event configuration is successful, the circuit domain fallback flow is executed for the terminal. According to the embodiment of the invention, by adding the switch for refusing the establishment of the QCI1 when starting the call in the weak coverage and the delay switch, when a user is in the weak coverage scene and dials a voice call, the establishment time of the QCI is optimized, so that the Volte call and the switching success rate in the weak coverage scene are improved.
Example four
Referring to fig. 4, a schematic structural diagram of a voice switching apparatus provided in an embodiment of the present invention is shown, where the voice switching apparatus may specifically include the following modules:
a2 measurement report determining module 410, configured to determine, when the radio resource management system receives an E-RAB establishment request message initiated by a terminal and needs to establish a QCI1 bearer, whether the terminal has reported an a2 measurement report; the A2 measurement report is a measurement report indicating that weak coverage rejects QCI1 bearer establishment;
an a2 report determining module 420, configured to determine whether the terminal has reported a voice a2 report/a data a2 report when the first switch is in an off state and the terminal has not reported the a2 measurement report;
a B2 measurement event configuration module 430, configured to send a reconfiguration message for establishing QCI1 to the terminal when the terminal has reported the voice a2 report or the terminal has reported the data a2 report, and configure a heterogeneous system voice B2 measurement event for the terminal;
a first switch starting module 440, configured to start the first switch when a reconfiguration response message returned by the terminal is not received and an a2 measurement report of a weak origination call of the terminal is received;
a response message replying module 450, configured to reply an E-RAB establishment response message to the mobility management entity when a cell having a neighboring cell relationship exists in a target cell to which the terminal is accessed;
a neighboring cell relation determining module 460, configured to determine whether a cell with a neighboring cell relation exists in a target cell to which the terminal is connected, when the terminal has reported an a2 measurement report and the first switch is in a start state; the first switch is a switch used for indicating that the QCI1 is refused to be established when the call is started in weak coverage;
a reject bearer sending module 470, configured to send, to the terminal, a message for rejecting the QCI1 bearer establishment when the target cell has a cell with a neighboring cell relationship;
a voice B2 event configuration module 480, configured to configure a voice B2 measurement event for the terminal when the voice/data a2 report reported by the terminal is received and the second switch is in an activated state; the second switch is a switch for indicating the delay switching of the weak field call;
a circuit domain fallback performing module 490, configured to perform a circuit domain fallback procedure on the terminal when the voice B2 measurement event configuration is successful;
an alarm information generating module 4100, configured to generate corresponding alarm information when any one of the above processes fails;
an alarm information sending module 4110, configured to send the alarm information to a mobility management entity.
Preferably, the voice B2 event configuration module 480 includes:
the current state judgment submodule is used for judging the current state of the terminal under the condition that a voice/data A2 report reported by the terminal is received and the second switch is in a starting state;
a voice B2 event configuration sub-module, configured to configure the voice B2 measurement event when the current state is a state in which voice service continuity can be performed.
Preferably, the method further comprises the following steps:
a delay timer starting module, configured to start a switching delay timer when the current state is a state in which voice service continuity cannot be performed;
an a2 measurement report checking module for checking whether a voice/data a2 measurement report is received if the handover delay timer is expired and the terminal is not configured with a voice B2 measurement event;
a first terminal state modification module, configured to modify a state of the terminal to a state in which voice service continuity is possible, in a case where a voice/data a2 measurement report is received;
a voice B2 measurement event configuration module, configured to configure a voice B2 measurement event for the terminal.
Preferably, the method further comprises the following steps:
a QCI1 bearer deleting module, configured to delete the QCI1 bearer of the terminal, or reconfigure the QCI1 bearer of the terminal to be a non-QCI 1 bearer;
the second terminal state modifying module is used for modifying the state of the terminal into a state that the voice service continuity can not be carried out;
a running state checking module for checking the running state of the switching delay timer;
a delay timer stopping module, configured to stop the handover delay timer when the handover delay timer is in a running state.
The embodiment of the invention provides a voice switching device, which judges whether a terminal reports an A2 measurement report or not when a radio resource management system receives an E-RAB establishment request message initiated by the terminal and needs to establish a QCI1 bearer, the A2 measurement report is a measurement report indicating that weak coverage rejects the establishment of the QCI1 bearer, judges whether a target cell accessed by the terminal has a cell with a neighboring cell relation or not when the terminal reports the A2 measurement report and a first switch is in a starting state, the first switch is a switch used for rejecting the establishment of the QCI1 when the weak coverage calls up, sends a message rejecting the establishment of the QCI1 bearer to the terminal when the target cell has the cell with the neighboring cell relation, and configures a voice/data A2 report reported by the terminal and a second switch is in the starting state for the terminal to configure a voice B2 measurement event, the second switch is a switch for indicating the delay switching of the call from the weak field, and when the voice B2 measurement event configuration is successful, the circuit domain fallback flow is executed for the terminal. According to the embodiment of the invention, by adding the switch for refusing the establishment of the QCI1 when starting the call in the weak coverage and the delay switch, when a user is in the weak coverage scene and dials a voice call, the establishment time of the QCI is optimized, so that the Volte call and the switching success rate in the weak coverage scene are improved.
While specific reference may have been made to the above-described method embodiments for simplicity of explanation, the various acts illustrated in the various blocks, for example, may be performed in any order, or performed in any combination, as those skilled in the art will appreciate that the present invention is not limited by the illustrated ordering of acts, as some steps may occur in other orders or concurrently, in accordance with the invention. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required by the invention.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing describes in detail a voice switching method and a voice switching apparatus provided by the present invention, and specific examples are applied herein to explain the principles and embodiments of the present invention, and the descriptions of the foregoing embodiments are only used to help understand the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A voice switching method, comprising:
under the condition that a wireless resource management system receives an E-RAB establishment request message initiated by a terminal and needs to establish a QCI1 bearer, judging whether the terminal reports an A2 measurement report; the A2 measurement report is a measurement report indicating that weak coverage rejects QCI1 bearer establishment;
under the condition that the terminal reports an A2 measurement report and a first switch is in a starting state, judging whether a target cell accessed by the terminal has a cell with a neighboring cell relation; the first switch is a switch used for indicating that the QCI1 is refused to be established when the call is started in weak coverage;
under the condition that the target cell has a cell with a neighbor cell relation, sending a message of rejecting the establishment of the QCI1 bearer to the terminal;
under the condition that a voice/data A2 report reported by the terminal is received and a second switch is in an activated state, configuring a voice B2 measurement event for the terminal; the second switch is a switch for indicating the delay switching of the weak field call;
when the voice B2 measurement event configuration is successful, executing a circuit domain fallback flow to the terminal;
the step of configuring a voice B2 measurement event for the terminal when the voice/data a2 report reported by the terminal is received and the second switch is in an activated state includes:
judging the current state of the terminal under the condition that a voice/data A2 report reported by the terminal is received and a second switch is in a starting state;
and when the current state is a state capable of performing voice service continuity, configuring the voice B2 measurement event.
2. The method of claim 1, wherein after the step of determining whether the terminal has reported an a2 measurement report, the method further comprises:
under the condition that the first switch is in a closed state and the terminal does not report the A2 measurement report, judging whether the terminal reports a voice A2 report/data A2 report or not;
under the condition that the terminal reports the voice A2 report or the terminal reports the data A2 report, sending a reconfiguration message for establishing QCI1 to the terminal, and configuring a different system voice B2 measurement event for the terminal;
starting the first switch under the condition that a reconfiguration response message returned by the terminal is not received and an A2 measurement report of a weak field originating call of the terminal is received;
and under the condition that the target cell accessed by the terminal has the cell with the adjacent cell relation, replying an E-RAB establishment response message to the mobility management entity.
3. The method according to claim 1, further comprising, after the step of determining the current state of the terminal:
when the current state is a state that voice service continuity can not be carried out, starting a switching delay timer;
in case the handover delay timer expires and the terminal is not configured with a voice B2 measurement event, checking whether a voice/data a2 measurement report is received;
modifying the state of the terminal to a state in which voice service continuity can be performed in the case that the voice/data a2 measurement report is received;
the terminal is configured with a voice B2 measurement event.
4. The method according to claim 3, further comprising, after the step of configuring the terminal with a voice B2 measurement event:
deleting the QCI1 bearer of the terminal, or reconfiguring the QCI1 bearer of the terminal into a non-QCI 1 bearer;
modifying the state of the terminal into a state that the voice service continuity can not be carried out;
checking an operation state of the handover delay timer;
stopping the handover delay timer when the handover delay timer is in an active state.
5. The method of claim 1 or 2 or 3 or 4, further comprising:
generating corresponding alarm information under the condition of failure;
and sending the alarm information to a mobility management entity.
6. A voice switching apparatus, comprising:
a2 measurement report determining module, configured to determine, when the radio resource management system receives an E-RAB establishment request message initiated by a terminal and a QCI1 bearer needs to be established, whether the terminal has reported an a2 measurement report; the A2 measurement report is a measurement report indicating that weak coverage rejects QCI1 bearer establishment;
a neighboring cell relation determining module, configured to determine whether a cell with a neighboring cell relation exists in a target cell to which the terminal is connected, when the terminal has reported an a2 measurement report and the first switch is in a start state; the first switch is a switch used for indicating that the QCI1 is refused to be established when the call is started in weak coverage;
a reject bearer sending module, configured to send, to the terminal, a message for rejecting the QCI1 bearer establishment when the target cell has a cell with a neighboring cell relationship;
a voice B2 event configuration module, configured to configure a voice B2 measurement event for the terminal when a voice/data a2 report reported by the terminal is received and a second switch is in an activated state; the second switch is a switch for indicating the delay switching of the weak field call;
a circuit switched fallback execution module, configured to execute a circuit switched fallback procedure to the terminal when the voice B2 measurement event configuration is successful;
the voice B2 event configuration module comprises:
the current state judgment submodule is used for judging the current state of the terminal under the condition that a voice/data A2 report reported by the terminal is received and the second switch is in a starting state;
a voice B2 event configuration sub-module, configured to configure the voice B2 measurement event when the current state is a state in which voice service continuity can be performed.
7. The apparatus of claim 6, further comprising:
an a2 report judgment module, configured to, when the first switch is in an off state and the terminal has not reported the a2 measurement report, judge whether the terminal has reported a voice a2 report/a data a2 report;
a B2 measurement event configuration module, configured to send a reconfiguration message for establishing QCI1 to the terminal when the terminal has reported the voice a2 report or the terminal has reported the data a2 report, and configure a different-system voice B2 measurement event for the terminal;
the first switch starting module is used for starting the first switch under the condition that a reconfiguration response message returned by the terminal is not received and an A2 measurement report of a weak field originating call of the terminal is received;
and the response message replying module is used for replying the E-RAB establishment response message to the mobility management entity under the condition that the target cell accessed by the terminal has the cell with the adjacent cell relation.
8. The apparatus of claim 6, further comprising:
a delay timer starting module, configured to start a switching delay timer when the current state is a state in which voice service continuity cannot be performed;
an a2 measurement report checking module for checking whether a voice/data a2 measurement report is received if the handover delay timer is expired and the terminal is not configured with a voice B2 measurement event;
a first terminal state modification module, configured to modify a state of the terminal to a state in which voice service continuity is possible, in a case where a voice/data a2 measurement report is received;
a voice B2 event configuration module for configuring a voice B2 measurement event for the terminal.
9. The apparatus of claim 8, further comprising:
a QCI1 bearer deleting module, configured to delete the QCI1 bearer of the terminal, or reconfigure the QCI1 bearer of the terminal to be a non-QCI 1 bearer;
the second terminal state modifying module is used for modifying the state of the terminal into a state that the voice service continuity can not be carried out;
a running state checking module for checking the running state of the switching delay timer;
a delay timer stopping module, configured to stop the handover delay timer when the handover delay timer is in a running state.
10. The apparatus of claim 6, 7, 8 or 9, further comprising:
the warning information generating module is used for generating corresponding warning information under the condition of failure;
and the alarm information sending module is used for sending the alarm information to a mobility management entity.
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| US9344933B1 (en) * | 2014-04-10 | 2016-05-17 | Sprint Communications Company L.P. | Mobility management entity (MME) system and method to disable voice over LTE (VoLTE) service of a long term evolution (LTE) base station |
| CN105992283A (en) * | 2015-01-28 | 2016-10-05 | 中兴通讯股份有限公司 | Reservation method and device for loading resources |
| CN108029036B (en) * | 2015-09-15 | 2021-07-16 | 华为技术有限公司 | Service processing method, service processing device and communication system |
| EP3364674B1 (en) * | 2015-11-06 | 2019-10-09 | Huawei Technologies Co., Ltd. | Voice roaming method, mobility management network element, and access network element |
| CN107222896B (en) * | 2016-03-22 | 2020-08-07 | 中国移动通信集团公司 | Voice service switching method and base station |
| EP3442273B1 (en) * | 2016-06-29 | 2020-07-08 | Huawei Technologies Co., Ltd. | Method and apparatus for service processing |
| CN109792799B (en) * | 2017-03-20 | 2021-06-01 | 华为技术有限公司 | Service communication method and device |
| CN108924858B (en) * | 2017-04-26 | 2021-08-10 | 中国移动通信集团设计院有限公司 | VoLTE voice call drop judgment method and device |
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