CN108235385B - Method and device for realizing continuity of single radio frequency voice call before ringing and mobile terminal - Google Patents
Method and device for realizing continuity of single radio frequency voice call before ringing and mobile terminal Download PDFInfo
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- CN108235385B CN108235385B CN201611160158.0A CN201611160158A CN108235385B CN 108235385 B CN108235385 B CN 108235385B CN 201611160158 A CN201611160158 A CN 201611160158A CN 108235385 B CN108235385 B CN 108235385B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
- H04W36/0022—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies
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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 method, a device and a mobile terminal for realizing single radio frequency voice call continuity before ringing. The method comprises the following steps: sending a telephone establishment request message to an LTE network; when the LTE network signal is degraded, receiving instruction switching information issued by the LTE network; when the fact that whether the LTE network supports single radio frequency voice call continuity (bSRVCC) switching before ringing or not is unknown, the LTE network is defaulted to support the bSRVCC switching, and a network access module is switched from an LTE module to an 2/3G module; synchronizing a telephony state under the LTE module to the 2/3G module circuit switched domain; when receiving the message which is sent by the network side and is being established by the telephone of the circuit switching domain, continuing the subsequent call establishment action, otherwise, dropping the call by the telephone. The invention can reduce the failure rate of bSRVCC switching before receiving the conversation progress message, thereby reducing the probability of call drop.
Description
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a method and an apparatus for implementing continuity of a single radio frequency voice call before ringing, and a mobile terminal.
Background
With the continuous development of mobile phone technology and the gradual deepening of 4G network, the 4G-based voice service is developed greatly, the 4G-based voice service is an IP data transmission technology, and can bear all services on the 4G network without depending on the previous 2G/3G network, thereby realizing the unification of data and voice services on the same network; that is, with the support of 4G-based voice services, we can not only enjoy high-rate data services in 4G networks, but also use it for higher-quality voice and video calls.
The single radio frequency voice call continuity scheme is a standard scheme for keeping a 4G based voice telephone continuous when the telephone is switched to 2/3G circuit switched domain.
The bSRVCC technology generally refers to that after a terminal receives a session progress message, handover occurs Before a Ringing message is received, because a network simultaneously establishes an evolved packet system bearer when sending the session progress message to the terminal, wherein the session progress message indicates whether the network supports bSRVCC handover, when the network supports bSRVCC handover, the network is handed over to an 2/3G network through bSRVCC after receiving a handover instruction to perform a session, and if the network does not support bSRVCC handover, the network handover fails.
However, when the session progress message is transmitted through a TCP connection or a UDP connection, the terminal may receive a handover command sent by the network before receiving the session progress message due to poor signals of the 4G network or network delay, and at this time, the terminal may default that the network does not support bSRVCC for processing.
In the process of implementing the invention, the inventor finds that at least the following technical problems exist in the prior art:
in the prior art, for the situation that a handover command issued by a network is received before a terminal receives a session progress message, the network does not support bSRVCC by default, and no matter whether the actual network supports bSRVCC or not, the problem that the terminal does not perform handover due to the default network does not support bSRVCC occurs, so that a call drop phenomenon occurs.
Disclosure of Invention
The method, the device and the mobile terminal for realizing the continuity of the single radio frequency voice call before ringing provided by the invention process the process of switching the 4G-based voice telephone from 4G to 2/3G by assuming the way that the network supports bSRVCC switching when the unknown network supports bSRVCC switching, and can reduce the failure rate of bSRVCC switching before receiving the session progress message, thereby reducing the frequency of call drop.
In a first aspect, the present invention provides a method for implementing continuity of a single radio frequency voice call before ringing, including:
sending a telephone establishment request message to an LTE network;
when the LTE network signal is degraded, receiving switching network information of an instruction issued by the LTE network;
when the fact that whether the LTE network supports single radio frequency voice call continuity (bSRVCC) switching before ringing or not is unknown, the LTE network is defaulted to support the bSRVCC switching, and a network access module is switched from an LTE module to an 2/3G module;
after the network access module is switched from the LTE module to the 2/3G module, synchronizing the telephone state under the LTE module to the 2/3G module circuit switching domain;
when receiving the message which is sent by the network side and is being established by the telephone of the circuit switching domain, continuing the subsequent call establishment action, otherwise, dropping the call by the telephone.
Optionally, before receiving information indicating to switch networks sent by a network, receiving a session progress message, and determining whether the network supports the bSRVCC handover according to header information carried in the session progress message;
optionally, the continuing the subsequent call establishment action when receiving the message that the telephone in the circuit switched domain sent by the network side is being established includes:
receiving a ringing message sent by the 2/3G network;
receiving a call completion message sent by the 2/3G network;
and replying to the message for confirming the telephone answering on the network side.
In a second aspect, the present invention provides an apparatus for implementing continuity of a single radio frequency voice call before ringing, including:
a sending unit, configured to send a telephone setup request message to an LTE network;
the receiving unit is used for receiving the instruction switching network information issued by the LTE network when the LTE network signal is deteriorated;
a switching unit, configured to, when it is unknown whether the LTE network supports single radio frequency voice call continuity bSRVCC handover before ringing, default that the LTE network supports the single radio frequency voice call continuity bSRVCC handover before ringing, and switch the network access module from an LTE module to an 2/3G module;
a synchronization unit, configured to synchronize a phone state under the LTE module to the 2/3G module circuit switched domain after the network access module is switched from the LTE module to the 2/3G module;
the first processing unit is used for continuing the subsequent call establishment action when receiving a message which is sent by the network side and is established by the telephone in the circuit switching domain, otherwise, the telephone is dropped.
Optionally, the receiving unit is further configured to receive a session progress message before receiving information indicating to switch a network, where the information is sent by the network, and determine whether the network supports the bSRVCC handover according to header information carried in the session progress message;
optionally, the first processing unit further includes:
a first receiving module, configured to receive a ringing message sent by the 2/3G network;
the second receiving module is used for receiving a call completion message sent by the 2/3G network;
and the confirmation module is used for replying a message for confirming the telephone answering to the network side.
In a third aspect, the present invention provides a mobile terminal, where the mobile terminal includes the apparatus for implementing continuity of a single radio frequency voice call before ringing.
The method, the device and the mobile terminal for realizing the continuity of the single radio frequency voice call before ringing provided by the embodiment of the invention process the process of switching the 4G-based voice telephone from 4G to 2/3G by assuming the way that the network supports bSRVCC switching when the unknown network supports the bSRVCC switching, and can reduce the failure rate of bSRVCC switching before receiving the session progress message, thereby reducing the probability of call drop.
Drawings
FIG. 1 is a flow chart of a method for implementing single RF voice call continuity before ringing according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an apparatus for implementing continuity of a single RF voice call before ringing according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of the first processing unit 15 in fig. 2 according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The present invention provides a method for implementing continuity of a single radio frequency voice call before ringing, as shown in fig. 1, the method includes:
s11, sending a telephone establishment request message to the LTE network;
s12, when the LTE network signal is deteriorated, receiving indication switching network information issued by the LTE network;
s13, when it is unknown whether the LTE network supports single radio frequency voice call continuity bSRVCC switching before ringing, defaulting that the LTE network supports the bSRVCC switching, and switching a network access module from an LTE module to a 2/3G module;
optionally, before receiving information indicating to switch networks sent by a network, receiving a session progress message, and determining whether the network supports the bSRVCC handover according to header information carried in the session progress message;
optionally, the session progress message refers to 183 session progress message;
optionally, the network is considered to support the bSRVCC handover when the session progress message contains a "g.3gpp.ps2cs-srvcc-orig-pre-alerting" field of specific header information, otherwise, the network is considered not to support the bSRVCC handover.
Optionally, when it is known whether the LTE network supports bSRVCC handover, the network is handed over according to whether the LTE network supports bSRVCC handover.
S14, after the network access module is switched from the LTE module to the 2/3G module, synchronizing the telephone state of the LTE module to the 2/3G module circuit switching domain;
s15, when receiving the message that the telephone of the circuit switching domain is establishing sent by the network side, continuing the subsequent call establishing action, otherwise, the telephone is dropped.
The method for realizing continuity of the single radio frequency voice call before ringing provided by the embodiment of the invention processes the process of switching from 4G to 2/3G based on the 4G voice telephone by assuming the mode that the network supports bSRVCC switching when the unknown network supports bSRVCC switching, and can reduce the failure rate of bSRVCC switching before receiving the session progress message, thereby reducing the frequency of call drop.
An embodiment of the present invention further provides an apparatus for implementing continuity of a single radio frequency voice call before ringing, as shown in fig. 2, the apparatus includes:
a sending unit 11, configured to send a telephone setup request message to an LTE network;
a receiving unit 12, configured to receive, when the LTE network signal is degraded, network information indicating handover issued by the LTE network;
optionally, before receiving information indicating to switch networks sent by a network, receiving a session progress message, and determining whether the network supports the bSRVCC handover according to header information carried in the session progress message;
a switching unit 13, configured to, when it is unknown whether the LTE network supports single radio frequency voice call continuity bSRVCC handover before ringing, default that the LTE network supports the single radio frequency voice call continuity bSRVCC handover before ringing, and switch the network module from an LTE module to an 2/3G module;
a synchronization unit 14, configured to synchronize a phone state under the LTE module to the 2/3G module circuit switched domain after the network module is switched from the LTE module to the 2/3G module;
the first processing unit 15 is configured to continue the subsequent call establishment action when receiving a message that a telephone in the circuit switched domain sent by the network side is being established, otherwise, the telephone is dropped.
The device for realizing single radio frequency voice call continuity before ringing provided by the embodiment of the invention processes the process of switching the 4G-based voice telephone from 4G to 2/3G by assuming the mode that the network supports bSRVCC switching when unknown network supports bSRVCC switching, and can reduce the failure rate of bSRVCC switching before receiving the session progress message, thereby reducing the frequency of call drop.
Optionally, as shown in fig. 3, the first processing unit 15 further includes:
a first receiving module 151, configured to receive a ringing message sent by the 2/3G network;
a second receiving module 152, configured to receive a call completion message sent by the 2/3G network;
and the confirmation module 153 is used for replying a message for confirming the telephone answering to the network side.
The embodiment of the invention also provides a mobile terminal which comprises the device for realizing the continuity of the single radio frequency voice call before ringing.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. A method for implementing continuity of a single radio frequency voice call before ringing, comprising:
sending a telephone establishment request message to an LTE network;
when the LTE network signal is degraded, receiving switching network information of an instruction issued by the LTE network, wherein the LTE network supports bSRVCC switching;
when the fact that whether the LTE network supports single radio frequency voice call continuity (bSRVCC) switching before ringing or not is unknown, the LTE network is defaulted to support the bSRVCC switching, and a network access module is switched from an LTE module to an 2/3G module;
after the network access module is switched from the LTE module to the 2/3G module, synchronizing the telephone state under the LTE module to the 2/3G module circuit switching domain;
when receiving the message which is sent by the network side and is being established by the telephone of the circuit switching domain, continuing the subsequent call establishment action, otherwise, dropping the call by the telephone.
2. The method of claim 1, wherein the receiving the handover indication network information delivered by the LTE network further comprises:
and before receiving information which is sent by a network and indicates to switch the network, receiving a session progress message, and determining whether the network supports the bSRVCC switching or not according to header domain information carried in the session progress message.
3. The method according to claim 1, wherein the continuing the subsequent call setup action when receiving the message sent by the network side that the telephone in the circuit switched domain is being setup comprises:
receiving a ringing message sent by the 2/3G network;
receiving a call completion message sent by the 2/3G network;
and replying to the message for confirming the telephone answering on the network side.
4. An apparatus for implementing continuity of a single radio frequency voice call before ringing, comprising:
a sending unit, configured to send a telephone setup request message to an LTE network;
a receiving unit, configured to receive network information indicating handover issued by the LTE network when the LTE network signal is degraded, where the LTE network supports bSRVCC handover;
a switching unit, configured to, when it is unknown whether the LTE network supports single radio frequency voice call continuity bSRVCC handover before ringing, default that the LTE network supports the bSRVCC handover, and switch the network access module from an LTE module to an 2/3G module;
a synchronization unit, configured to synchronize a phone state under the LTE module to the 2/3G module circuit switched domain after the network access module is switched from the LTE module to the 2/3G module;
the first processing unit is used for continuing the subsequent call establishment action when receiving a message which is sent by the network side and is established by the telephone in the circuit switching domain, otherwise, the telephone is dropped.
5. The apparatus of claim 4, wherein the receiving unit is further configured to:
and before receiving information which is sent by a network and indicates to switch the network, receiving a session progress message, and determining whether the network supports the bSRVCC switching or not according to header domain information carried in the session progress message.
6. The apparatus of claim 4, wherein the first processing unit further comprises:
a first receiving module, configured to receive a ringing message sent by the 2/3G network;
the second receiving module is used for receiving a call completion message sent by the 2/3G network;
and the confirmation module is used for replying a message for confirming the telephone answering to the network side.
7. A mobile terminal characterized in that it comprises means for implementing a single radio frequency voice call continuity before ringing as claimed in any one of claims 4 to 6.
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| CN201611160158.0A CN108235385B (en) | 2016-12-15 | 2016-12-15 | Method and device for realizing continuity of single radio frequency voice call before ringing and mobile terminal |
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| TS 23.237 V14.0.0 IP Multimedia Subsystem (IMS) Service Continuity;3GPP;《3GPP》;20160622;全文 * |
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