CN115834549A - Call switching method and device, electronic equipment and computer readable medium - Google Patents
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Abstract
The invention discloses a call switching method, a call switching device, electronic equipment and a computer readable medium, belongs to the technical field of communication, and solves the problem that a voice call cannot be converted into a video call. The method comprises the following steps: receiving a bearer modification request sent by core network equipment; the bearer modification request is used for requesting to increase the bearer of the video stream in the voice session process of the calling terminal and the called terminal; acquiring all bearers sent to the base station equipment by the core network equipment; sequencing all the obtained bearers according to the bearer creation time to obtain a bearer sequence; and sequentially processing the bearing sequence, and sending a video call request to the called terminal after the bearing contained in the bearing modification request is processed, so as to switch the voice call between the calling terminal and the called terminal into a video call. The method can realize the successful switching of the voice call between the calling terminal and the called terminal into the video call.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a call switching method, a call switching device, electronic equipment and a computer readable medium.
Background
A Voice over Long-Term Evolution (VoLTE) is a high-speed wireless communication standard for mobile phones and data terminals. There are the following problems in the usage test of VoLTE: when the voice call is converted into the video call, the other party cannot receive the request prompt, and the use of the voice call and the video call by the user is greatly influenced.
Disclosure of Invention
Therefore, the invention provides a call switching method, a call switching device, electronic equipment and a computer readable medium, which are used for solving the problem that when a voice call is converted into a video call in the related art, the other party cannot receive a request, so that the voice call cannot be converted into the video call.
In order to achieve the above object, a first aspect of the present invention provides a call handover method, which is applied to a base station device to which a called terminal belongs, and the method includes: receiving a bearer modification request sent by core network equipment; the bearer modification request is used for requesting to increase the bearer of the video stream in the voice session process of the calling terminal and the called terminal; acquiring all bearers sent to the base station equipment by the core network equipment; sequencing all the obtained bearers according to the bearer creation time to obtain a bearer sequence; and sequentially processing the bearing sequence, and sending a video call request to the called terminal after the bearing contained in the bearing modification request is processed, so as to switch the voice call between the calling terminal and the called terminal into a video call.
Wherein, the obtained all the load bearing is sequenced according to the load bearing establishing time,
obtaining a bearer sequence, including: detecting the creation time of each bearer in all the bearers; acquiring the load bearing within a preset time threshold range from all the load bearings; and sequencing the bearers within the preset time threshold value range according to the creation time of each bearer to obtain the bearer sequence.
A second aspect of the present invention provides a call handover method, which is applied to a calling terminal, and includes: in the process of voice conversation with a called terminal, sending a re-request message to core network equipment according to the video conversation requirement, so as to send a bearing modification request to base station equipment to which the called terminal belongs through the core network equipment according to the video conversation requirement, wherein the bearing modification request is used for requesting to increase the bearing of a video stream in the process of the voice conversation; responding to a video answering consent message from the called terminal, and carrying out video call with the called terminal; the video answering approval message is a message sent to the calling terminal by the called terminal after responding to a video call request sent by the base station equipment and selecting to approve video answering; the video call request is a video call request sent to the called terminal after the base station device responds to the bearer modification request, sequentially processes all obtained bearers sent to the base station device by the core network device according to bearer creation time, and processes the bearers contained in the bearer modification request.
Wherein, in the process of voice conversation with the called terminal, before sending a re-request message to the core network device according to the video conversation requirement, the method further comprises: sending a voice call request to the called terminal, wherein the voice call request carries a contact accepting header field containing a media type label, and the media type label is used for representing that the calling terminal has voice service capability; and receiving a session response message sent by the called terminal, wherein the session response message comprises the media type label and the video label, and the media type label and the video label are used for representing that the called terminal has voice service capability and video service capability.
Wherein before sending the voice call request to the called terminal, the method further comprises: sending an initial request to the called terminal, wherein the initial request does not carry a session protocol proposal message; receiving an initial request response message which is sent by the called terminal and carries a session protocol proposal message, wherein the session protocol proposal message carries audio information, and the audio information comprises at least one media line; and sending a session protocol response message to the called terminal, wherein the session protocol response message carries the coding mode set for each media line.
Wherein, the method also comprises: if the call based on the voice call request is not established and meets the preset condition, a cancellation request is sent to the called terminal within the preset time range, and the cancellation request is used for canceling the voice call request; wherein the predetermined time range is: after receiving a temporary response of the called terminal to the voice call request, and within a time range before receiving a final response message.
Wherein after sending the voice call request to the called terminal, the method further comprises: and under the condition that a ringing message sent by the called terminal is received and the called terminal does not answer, sending a cancellation request to the called terminal after a first preset time, wherein the cancellation request is used for canceling the voice call request.
A third aspect of the present invention provides a base station device to which a called terminal belongs, the base station device including: a receiving module, configured to receive a bearer modification request sent by a core network device; the bearer modification request is used for requesting to increase the bearer of the video stream in the voice session process of the calling terminal and the called terminal; an obtaining module, configured to obtain all bearers sent by the core network device to the base station device; the sequencing module is used for sequencing all the obtained bearers according to the bearer creation time to obtain a bearer sequence; and the processing module is used for sequentially processing the bearing sequence, and sending a video call request to the called terminal after the bearing contained in the bearing modification request is processed, so as to switch the voice call between the calling terminal and the called terminal into a video call.
A fourth aspect of the present invention provides a calling terminal, including: a sending module, configured to send a re-request message to a core network device according to a video session requirement during a voice session with a called terminal, so as to send a bearer modification request to a base station device to which the called terminal belongs through the core network device according to the video session requirement, where the bearer modification request is used to request that a bearer of a video stream is added during the voice session; the call module is used for responding to the video answering consent message from the called terminal and carrying out video call with the called terminal; the video answering approval message is a message sent to the calling terminal by the called terminal after responding to a video call request sent by the base station equipment and selecting to approve video answering; the video call request is a video call request sent to the called terminal after the base station device responds to the bearer modification request, sequentially processes all obtained bearers sent to the base station device by the core network device according to bearer creation time, and processes the bearers contained in the bearer modification request.
A fifth aspect of the present invention provides an electronic apparatus, comprising: one or more processors; a memory on which one or more programs are stored, which when executed by the one or more processors, cause the one or more processors to implement the call switching method of any of the above aspects of the present invention; one or more I/O interfaces connected between the processor and the memory and configured to enable information interaction between the processor and the memory.
The invention has the following advantages: according to the call switching method in the embodiment of the invention, after receiving the bearer modification requirement of switching the voice call to the video call, the base station equipment sequences all obtained bearers according to the sequence of the bearer creation time and then sequentially processes the bearers, so that the carrying sequence of the bearers is consistent with the bearer creation sequence, and the voice call of the calling terminal and the voice call of the called terminal are switched to the video call and can be normally used under the condition that the base station side and the core network side are adjusted to be consistent, thereby promoting the application and development of the Unicom VoLTE service.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
Fig. 1 is a flowchart of a call handover method according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating real-time monitoring of message interaction between a core network, a base station side, and a terminal device according to an exemplary embodiment of the present invention;
fig. 3 is a schematic diagram illustrating real-time monitoring of message interaction between a core network, a base station side and a terminal device according to another exemplary embodiment of the present invention;
fig. 4 is a flowchart of a call handover method according to another embodiment of the present invention;
fig. 5 is a schematic structural diagram of a base station device according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a calling terminal according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
When the terms "comprises" and/or "comprising" are used herein, the terms "comprises," "comprising," "includes," "including," "includes" and/or "including," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
Embodiments of the invention may be described with reference to plan and/or cross-sectional views in light of idealized schematic illustrations of the invention. Accordingly, the example illustrations can be modified in accordance with manufacturing techniques and/or tolerances.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present invention and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
In the embodiment of the invention, VOLTE is a high-speed wireless communication standard facing mobile phones and data terminals. It is based on an Internet Protocol (IP) Multimedia System (IMS) network, using profiles (defined by the Global System for Mobile (GSM) association in the Permanent Reference Document (PRD) ir.92) on LTE that are tailored to the Control plane and Media plane of voice services, which enables voice services (Control and Media plane) to be transmitted as data streams in LTE data-bearing networks without the need to maintain and rely on traditional circuit-switched voice networks. The voice and data capacity of VoLTE exceeds the third generation Mobile communication technology (3 rd-generation, 3G) Universal Mobile Telecommunications System (UMTS) by more than three times, and exceeds the third generation Mobile communication technology (2 rd-generation, 2G) GSM by more than six times. Because the VoLTE packet header is smaller than the non-optimized Voice over IP (VoIP)/Long Term Evolution (LTE), it also uses bandwidth more efficiently.
The most direct feelings brought to the fourth generation mobile communication technology (4 rd-generation, 4G) users by the VoLTE technology are shorter connection waiting time and higher quality and more natural voice and video call effects. VoLTE is substantially different from 2G and 3G voice calls. VoLTE is an end-to-end voice solution that is architected under all IP conditions over 4G networks. Compared with 2G and 3G voice calls, voice quality of VoLTE can be improved by about 40%, because it adopts a high-resolution coding and decoding technology. VoLTE brings lower access delay (waiting time after dialing) for users, which is 50% lower than 3G, approximately 2 seconds, and 6-7 seconds in 2G era. In addition, under 2G and 3G, a drop sometimes occurs, but the drop rate of VoLTE is close to zero.
For operators, deploying VoLTE means opening the way to evolution towards mobile broadband voice. In the long run, this will bring two value to the operator, firstly, promote the wireless spectrum utilization ratio, reduce the network cost. For voice service, the frequency spectrum utilization efficiency of LTE is far better than that of the traditional system and reaches more than 4 times of that of GSM.
Another value is to improve the user experience, and the experience of VoLTE is significantly better than that of traditional Circuit Switched (CS) voice. Firstly, the introduction of high-definition voice and video coding and decoding obviously improves the communication quality; secondly, the call connection time of the VoLTE is greatly shortened, and tests show that the VoLTE is shortened by more than half compared with the CS call; third, seamless integration with converged Communication (RCS) can bring Rich services.
The development rhythm of the VoLTE service comprises the following stages:
the first stage is as follows: the LTE hotspot is covered, and pre-VoLTE application LTE in the initial stage mainly covers the hotspot and is mainly applied to mobile broadband data such as data cards and tablet computers, but some early LTE voice applications may also occur. The voice service based on the soft terminal, namely, the modes of 'LTE data card + soft terminal + computer', can meet the voice requirements of some specific scenes, and prepares for future VoLTE in a mobile phone deployment mode, and accumulates operation experience; second, the LTE client terminal Equipment (CPE) + fixed phone "mode is used in some countries in europe, such as germany, to provide broadband access and voice service to users in remote areas; third, the LTE mobile phone supports the FallBack Circuit Switched FallBack (CSFB) domain and the Voice synchronization support (Simultaneous Voice and LTE, SVLTE), and some operators have released this transitional application.
And a second stage: in the LTE area continuous coverage area, operators expand the LTE coverage level in the period of VoLTE development, and the conditions for operating voice services are achieved, particularly in cities and densely populated areas; meanwhile, the large number of LTE smart phones appears, and the development of VoLTE is promoted. The operator will at this stage be using VoLTE services over IMS. But before this, the operator needs to reserve a longer preparation time. Because VoLTE involves more new technologies on the one hand, the necessary tests and trials are required; on the other hand, deployment and integration of IMS require a certain period, and some devices in the existing network, such as a Mobile Switching Center (MSC), a Home Location Register (HLR), and an Internet Technology (IT) system, may need to be modified or upgraded accordingly. We believe it is necessary for operators to start preparing VoLTE one year or even longer in advance. In addition, LTE coverage at this stage is also limited, and operators need to provide seamless voice services by using the extent and depth of the traditional CS coverage, i.e. the interoperation of LTE and CS, where there are two main technical points: 1. the Service providing mode after the LTE user roams to the CS domain has two alternatives, one is to completely process the voice Service by the MSC, and the other is to provide the voice Service by accessing the IMS domain through the MSC, which is the IMS Centralized Service (ICS) architecture defined by 3GPP, and this requires to upgrade the current network MSC into an EMSC (enhanced MSC); 2. for LTE to CS handover during a Call, 3GPP defines a dual-mode Single-standby wireless Voice Call Continuity (SRVCC) technology.
And a third stage: LTE full coverage, voLTE becomes the mainstream application at this stage, LTE coverage reaches a quite perfect level, or LTE and other wireless broadband technologies such as HSPA make up a seamless network, so that mobile broadband voice applications become mainstream, and the traditional CS will be gradually replaced, which is, of course, a quite long process.
The following problems exist in the VoLTE test at present: the measurement-based redirection in an idle state realizes a VoLTE video call service in an Evolved Packet System (EPS) FallBack (FallBack), when a voice call is converted into a video call, the other party cannot receive a request prompt, and the VoLTE video call service is automatically hung up after 30 seconds, so that the use of the voice call and the video call by a user is greatly influenced, the user experience is seriously influenced, and the development of the VoLTE service is seriously hindered.
For better understanding of the present invention, the following describes a call handover method according to embodiments of the present invention in detail with reference to the accompanying drawings, and it should be noted that these embodiments are not intended to limit the scope of the present invention.
In a first aspect, an embodiment of the present invention provides a call handover method, which may be applied to a base station device to which a called terminal belongs. Fig. 1 is a flowchart illustrating a call handover method according to an embodiment of the present invention. As shown in fig. 1, a call handover method 100 in the embodiment of the present invention includes the following steps.
Step S110, receiving a bearer modification request sent by a core network device; the bearer modification request is used for requesting to increase the bearer of the video stream in the voice session process of the calling terminal and the called terminal.
Step S120, all bearers sent by the core network device to the base station device are acquired.
Step S130, all obtained bearers are sorted according to the bearer creation time, so as to obtain a bearer sequence.
Step S140, sequentially processing the bearer sequence, and sending a video call request to the called terminal after the bearer included in the bearer modification request is processed, so as to switch the voice call between the calling terminal and the called terminal to a video call.
According to the call switching method provided by the embodiment of the invention, after receiving the bearing modification requirement for converting the voice call into the video call, the base station equipment sequences all the obtained bearings according to the sequence of the bearing creation time and then sequentially processes the bearings, so that the bearing carrying sequence is consistent with the bearing creation sequence, the voice call of the calling terminal and the called terminal is switched into the video call and can be normally used under the condition that the regulation of the base station side and the core network side is consistent, and the application and the development of the VoLTE service are promoted.
Fig. 2 shows a schematic diagram of real-time monitoring of message interaction between a core network, a base station side and a terminal device according to an exemplary embodiment; fig. 3 shows a schematic diagram of real-time monitoring of message interaction between a core network, a base station side and a terminal device according to another exemplary embodiment.
In fig. 2 and 3, the header information of the real-time monitoring schematic diagram of the message interaction includes: time (Time), evolved node b (eNodeB), cell (cell), group Identity (Gid), mobility Management Entity (MME) S1 Application Protocol (S1 Application Protocol, AP) number, radio Network Temporary Identity (RNTI), data Identity (DataID), message name (MsgName), direction (Direction).
The S1 interface is a communication interface between an LTE eNodeB and an EPC (packet core Network), and the RNTI is used as an identifier of the UE in signal information between the UE and a Universal mobile telecommunications system Terrestrial Radio Access Network (UTRAN).
In the Evolved Radio Access Bearer (Erab ) creation Request (Setup Request) shown in fig. 2, the Erab is a Bearer in the 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.
E-UTRAN resources may be established, modified and released for user plane transmissions when the UE is in a connected state, i.e. after the UE context is established in the eNB. In LTE, the allocation, modification and release of resources are controlled by the network, and the Quality of Service (QoS) corresponding to the bearer is also controlled by the network. The establishment and modification of E-UTRAN resources is therefore initiated by the MME, while the MME provides the eNB with the corresponding QoS information. Although the eNB may initiate a release request of E-UTRAN resources, the release procedure is still controlled by the MME; meanwhile, the MME can also initiate the release of E-UTRAN resources.
As can be seen from fig. 2, in the bearer Setup Request (Erab Setup Request), erab establishes QCI1 (i.e., QCI = 1) before QCI2 (i.e., QCI = 2) after. QCI1 is that VOLTE voice channel just establishes when conversing, and QCI2 is VOLTE video conversation passageway, establishes when the video conversation.
In the bearer modification Request (Erab modification Request) shown in fig. 3, erab modification QCI2 precedes and QCI1 succeeds; at the moment, the Erab sequence is inconsistent with the Erab establishing sequence; because the base station side and the core network do not understand the protocol consistently, the base station side considers that when the bearer modification command sent by the core network contains a plurality of bearers, the carrying sequence of the bearers should be consistent with the bearer creation sequence. If the inconsistency is not consistent, the base station side cannot process normally. When the bearer modification request carries a plurality of evolved radio access bearers and the sequence of the Erab is inconsistent with the sequence of establishing the Erab, after the bearer modification (Erab modification) is completed, an Erab establishment failure caused by unavailable transmission resources occurs when the Erab is deleted and established again subsequently, and the air interface does not have QCI2 dedicated bearer for issuing.
According to the call switching method provided by the embodiment of the invention, after receiving the bearer modification requirement of voice call to video call, the base station equipment sequences all acquired bearers according to the sequence of bearer creation time and then sequentially processes the bearers, so that the carrying sequence of the bearers is consistent with the bearer creation sequence, and the protocols of the base station side and the core network side are adjusted to be consistent in a mobile communication network (for example, under a 4G network), so that the user terminal side can be normally used when the VoLTE video call service is switched from voice call to video call, and the application and development of the VoLTE service are promoted.
In some embodiments, step S130 may specifically include: detecting the creation time of each bearer in all bearers; acquiring the load bearing within a preset time threshold range from all the load bearings; and sequencing the bearers within the preset time threshold value range according to the creation time of each bearer to obtain a bearer sequence.
In this embodiment, a bearer time ordering module may be added at the base station side, and when the base station receives the bearer, the bearer sent to the base station by the core network is sent to the bearer time ordering module instead of being processed directly according to the existing call connection procedure, and the module is configured to detect the creation time of the bearer, and then order the bearers within a certain time threshold range according to the order of the bearer creation time, and send the bearers to the base station for processing.
According to the call switching method provided by the embodiment of the invention, the protocols of the base station side and the core network side under the 4G network are adjusted to be consistent, after the base station equipment receives the bearing modification requirement of converting the voice call into the video call, all the obtained bearings are sequenced according to the sequence of bearing creation time and then are sequentially processed, so that the protocols of the base station side and the core network side are adjusted to be consistent in a mobile communication network (for example, under the 4G network), the VoLTE video call service can be normally used by the user terminal side when the voice call is converted into the video call, and the application and development of the Unicom VoLTE service are promoted.
In a second aspect, an embodiment of the present invention provides a call handover method; the method may be applied to a calling terminal. Fig. 4 is a flowchart illustrating a call handover method according to another embodiment of the present invention. In some embodiments, the call switching method may be applied to a calling terminal, and may include the following steps.
S410, in the process of voice conversation with the called terminal, a re-request message is sent to core network equipment according to the video conversation requirement, so that a bearing modification request is sent to base station equipment to which the called terminal belongs through the core network equipment according to the video conversation requirement, and the bearing modification request is used for requesting to increase the bearing of a video stream in the process of voice conversation.
And S420, responding to the video answering consent message from the called terminal, and carrying out video conversation with the called terminal.
The video answering approval message is a message sent to the calling terminal by the called terminal after responding to a video calling request sent by the base station equipment and selecting to approve video answering; and the video call request is a video call request which is sent to the called terminal after the base station equipment responds to the bearer modification request, sequentially processes all obtained bearers sent to the base station equipment by the core network equipment according to the bearer creation time and processes the bearers contained in the bearer modification request.
In this embodiment, in the process of a voice session between a calling terminal and a called terminal, if the voice session needs to be converted into a video session, a re-request message needs to be sent to the core network device to request that a bearer of a video stream is increased in the process of the voice session, so that the core network sends a bearer modification request to the base station device to which the called terminal belongs according to the video session requirement, so that the base station device responds to the bearer modification request, sequentially processes all bearers sent by the core network device according to the bearer creation time, and sends a video answering grant message to the calling terminal when the called terminal grants a video answer after the bearers contained in the bearer modification request are processed, so that the user terminal side can be normally used when a VoLTE video call service is converted from a voice call to a video call.
In some embodiments, prior to S410, the method further comprises the following steps.
S11, sending a voice call request to the called terminal, wherein the voice call request carries a contact accepting header field containing a media type label, and the media type label is used for representing that the calling terminal has voice service capability.
In this step, when the calling terminal initiates a VoLTE voice caller, the Accept-Contact header field must be carried in the request (Invite) message; illustratively, a contact header field containing + g.3gpp.icsi-ref = "urn: urn-7: 3gpp-service.im.icsi.mmtel" must be carried; the header field information contains a media type label, which marks the software application which can be supported by the terminal and simultaneously represents the capability of the terminal; each application on the terminal device may be registered with a set of one or more services. These services are identified by IMS Communication Service Identifiers (ICSIs) or IMS application registry identifiers.
In some embodiments, the Invite request Accept-Contact header field should also contain a video tag when the terminal initiates a video call.
S12, receiving a session response message sent by the called terminal, wherein the session response message comprises a media type label and a video label, and the media type label and the video label are used for representing that the called terminal has voice service capability and video service capability.
In this step, the session response message may be carried in a 200OK message sent by the called terminal, or the session response may be carried in an 18x message sent by the called terminal. Wherein, the 18x message refers to a 180 message or a 183 message, the 180 message is a Ringing message, and the 183 message is a Session Progress (Session Progress), i.e., a Session in-Progress message.
In some embodiments, when the terminal establishes a VoLTE audio call, the Invite request, 18X and 200OK messages must carry a contact header field and identify that the terminal supports voice service capability by carrying + g.3gpp.icsi-ref = "urn: urn-7.
In some embodiments, before step S11, the call switching method further includes the following steps.
S22, an initial request is sent to the called terminal, and the initial request does not carry a session protocol proposal message.
S23, receiving an initial request response message carrying a session protocol proposal message sent by the called terminal, wherein the session protocol proposal message carries audio information, and the audio information comprises at least one media line.
And S24, sending a session protocol response message to the called terminal, wherein the session protocol response message carries the coding mode set for each media line.
Exemplarily, whether a contact header field in the INVITE request contains a video tag or an SDP carried video media line is judged, and if the contact header field in the INVITE request contains a video tag or an SDP carried video media line, a video media update request is initiated; and if the contact header field in the INVITE request does not contain a video tag or an SDP carries a video media line, initiating an audio media updating request.
In this embodiment, when the called terminal does not receive an initial Invite request of a Session Description Protocol (SDP) offer, the SDP offer of a response message to the request should carry audio information; the terminal carries a selected codec for each media line in the SDP answer that replies to the SDP offer.
In some embodiments, the call switching method further comprises the following steps.
If the call based on the voice call request is not established and meets the preset conditions, a cancellation request is sent to the called terminal within the preset time range, and the cancellation request is used for canceling the voice call request; wherein the predetermined time range is: after receiving a temporary response to the voice call request of the called terminal, and within a time range before receiving a final response message.
Illustratively, the server's provisional response message to the INVITE includes a 180ring or 183 message, and the final response message includes a 200ok message.
In this embodiment, the calling terminal supports the release of a call that has not been completed by sending a Cancel message that must be sent after receiving the temporary response to the Invite message and before receiving the final response.
In some embodiments, after the step of sending the voice call request to the called terminal in step S11, the call switching method further includes: and sending a cancellation request to the called terminal after the first preset time under the condition that the ringing message sent by the called terminal is received and the called terminal does not answer, wherein the cancellation request is used for canceling the voice call request.
For example, after receiving 180ringing, if the called party does not answer, the calling terminal may initiate a Cancel request after 60s, for example, after 120 s; in some embodiments, it may be selected to send the cancellation request to the called terminal after the first predetermined time and before the second predetermined time, for example, after 120s and before 300s, to ensure timeliness of the cancellation request.
In some embodiments, after the terminal receives the Invite request as the called, the user selects audio to answer, and the terminal should send a 200OK message for Invite to the calling, so as to implement audio communication between the calling terminal and the called terminal.
In some embodiments, when the terminal is in voice service, it sends a Re-INVITE request message with updated session description to modify the ongoing session, requesting an addition of video stream during the session.
When the base station where the called terminal is located receives the request for increasing the load of the video stream, the load within a certain time threshold value range is sequenced according to the sequence of the load creation time, and then is sent to the base station for processing. After the base station finishes processing according to the existing flow, the called terminal as the called receives the Invite switching request, the user selects to approve video answering, and the called terminal sends a 200OK message aiming at Invite to the calling terminal.
According to the call switching method of the embodiment of the invention, a bearing time sequencing module is added at the base station side, when the base station receives the bearing, the bearing is not processed directly according to the existing call connection process, but the bearing sent to the base station by the core network is sent to the bearing time sequencing module, the module is used for detecting the creation time of the bearing, then the bearing in a certain time threshold value range is sequenced according to the sequence of the bearing creation time, and then the bearing is sent to the base station for processing.
In the call switching method, if a calling terminal needs to convert a voice session into a video session in the voice session process with a called terminal, a re-request message needs to be sent to core network equipment to request to increase the bearer of a video stream in the voice session process, so that the core network sends a bearer modification request to base station equipment to which the called terminal belongs according to the video session requirement, the base station equipment responds to the bearer modification request, processes all bearers sent by the core network equipment in sequence according to bearer creation time, and sends a video call request to the called terminal after the bearers contained in the bearer modification request are processed, and the called terminal agrees with the video, sends a video answering agreement message to the calling terminal, so that the user terminal side can be normally used when a VoLTE video call service is converted from the voice call into the video call, and the switching and the normal use of the voice call to the video call of the calling terminal and the called terminal are realized under the condition that protocols of the base station side and the core network side are adjusted consistently, thereby promoting the application and the development of the VoLTE service.
The steps of the above methods are divided for clarity, and the implementation may be combined into one step or split some steps, and the steps are divided into multiple steps, so long as the same logical relationship is included, which are all within the protection scope of the present patent; it is within the scope of the patent to add insignificant modifications to the algorithms or processes or to introduce insignificant design changes to the core design without changing the algorithms or processes.
In a third aspect, an embodiment of the present invention provides a base station device to which a called terminal belongs.
Fig. 5 shows a schematic structural diagram of a base station device according to an embodiment of the present invention. As shown in fig. 5, the base station apparatus 500 includes the following modules.
A receiving module 510, configured to receive a bearer modification request sent by a core network device; the bearer modification request is used for requesting to increase the bearer of the video stream in the voice session process of the calling terminal and the called terminal;
an obtaining module 520, configured to obtain all bearers sent by the core network device to the base station device;
a sorting module 530, configured to sort all obtained bearers according to bearer creation time to obtain a bearer sequence;
the processing module 540 is configured to sequentially process the bearer sequence, and send a video call request to the called terminal after the bearer included in the bearer modification request is processed, so as to switch a voice call between the calling terminal and the called terminal to a video call.
In some embodiments, the sorting module 530 is specifically configured to: detecting the creation time of each bearer in all bearers; acquiring the load bearing within a preset time threshold range from all the load bearings; and sequencing the bearers within a preset time threshold value range according to the creation time of each bearer to obtain a bearer sequence.
According to the base station equipment provided by the embodiment of the invention, after receiving the bearer modification requirement of switching the voice call to the video call, the base station equipment sequences all acquired bearers according to the sequence of the bearer creation time and then sequentially processes the bearers, so that the carrying sequence of the bearers is consistent with the bearer creation sequence, the voice call of the calling terminal and the called terminal is switched to the video call and can be normally used under the condition that the base station side and the core network side are adjusted to be consistent, and the application and development of the Unicom VoLTE service are promoted.
In a fourth aspect, an embodiment of the present invention provides a calling terminal.
Fig. 6 shows a schematic structural diagram of a calling terminal provided according to an embodiment of the present invention. As shown in fig. 6, the calling terminal 600 includes the following modules.
A sending module 610, configured to send a re-request message to a core network device according to a video session requirement during a voice session with a called terminal, so as to send a bearer modification request to a base station device to which the called terminal belongs through the core network device according to the video session requirement, where the bearer modification request is used to request to add a bearer of a video stream during the voice session;
a call module 620, configured to perform a video call with a called terminal in response to a video answering approval message from the called terminal;
the video answering approval message is a message sent to the calling terminal by the called terminal after responding to a video calling request sent by the base station equipment and selecting to approve video answering; and the video call request is a video call request which is sent to the called terminal after the base station equipment responds to the bearer modification request, sequentially processes all obtained bearers sent to the base station equipment by the core network equipment according to the bearer creation time and processes the bearers contained in the bearer modification request.
In some embodiments, the sending module 610 is further configured to send, in a voice session with the called terminal, a voice call request to the called terminal before sending a re-request message to the core network device according to a video session requirement, where the voice call request carries an acceptance contact header field including a media type tag, and the media type tag is used to represent that the calling terminal has a voice service capability; the calling terminal also comprises a receiving module used for receiving the session response message sent by the called terminal, wherein the session response message comprises a media type label and a video label, and the media type label and the video label are used for representing that the called terminal has voice service capability and video service capability.
In some embodiments, the sending module 610 is further configured to send an initial request to the called terminal before sending the voice call request to the called terminal, where the initial request does not carry the sip invite message; the receiving module is further used for receiving an initial request response message which is sent by the called terminal and carries a session protocol offer message, wherein the session protocol offer message carries audio information, and the audio information comprises at least one media line; the sending module 610 is further configured to send a session protocol response message to the called terminal, where the session protocol response message carries a coding mode set for each media line.
In some embodiments, the sending module 610 is further configured to: if the call based on the voice call request is not established and meets the preset conditions, a cancellation request is sent to the called terminal within the preset time range, and the cancellation request is used for canceling the voice call request; wherein the predetermined time range is: after receiving a temporary response to the voice call request of the called terminal, and within a time range before receiving a final response message.
In some embodiments, the sending module 610 is further configured to: after sending the voice call request to the called terminal, under the condition that a ringing message sent by the called terminal is received and the called terminal does not answer, a cancellation request is sent to the called terminal after a first preset time, wherein the cancellation request is used for canceling the voice call request.
According to the calling terminal provided by the embodiment of the invention, if the voice session needs to be converted into the video session in the voice session process of the calling terminal and the called terminal, a re-request message needs to be sent to the core network equipment to request the increase of the load of the video stream in the voice session process, so that the core network sends a load modification request to the base station equipment to which the called terminal belongs according to the video session requirement, the base station equipment responds to the load modification request, all the loads sent by the core network equipment are sequentially processed according to the load creation time, the load contained in the load modification request is processed, a video call request sent to the called terminal is sent to the calling terminal, and the video call approval message is sent to the calling terminal under the condition that the called terminal approves the video call, so that the user terminal side can be normally used when the VoLTE video call service is converted into the video call from the voice call.
It is to be understood that the invention is not limited to the particular arrangements and instrumentality described in the above embodiments and shown in the drawings. For convenience and brevity of description, detailed description of a known method is omitted here, and for the specific working processes of the system, the module and the unit described above, reference may be made to corresponding processes in the foregoing method embodiments, which are not described herein again.
Referring to fig. 7, an embodiment of the present invention provides an electronic device, including:
one or more processors 701;
a memory 702 on which one or more programs are stored, which when executed by one or more processors, cause the one or more processors to implement the call switching method of any one of the above;
one or more I/O interfaces 703 connected between the processor and the memory, configured to enable information interaction between the processor and the memory.
The processor 701 is a device with data processing capability, and includes but is not limited to a Central Processing Unit (CPU) and the like; memory 702 is a device having data storage capabilities including, but not limited to, random access memory (RAM, more specifically SDRAM, DDR, etc.), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), FLASH memory (FLASH); an I/O interface (read/write interface) 703 is coupled between the processor 701 and the memory 702 and enables information interaction between the processor 701 and the memory 702, including but not limited to a data Bus (Bus) or the like.
In some embodiments, the processor 701, memory 702, and I/O interface 703 are connected to each other, and thus to other components of the computing device, by a bus.
The present embodiment further provides a computer readable medium, where a computer program is stored, and when the computer program is executed by a processor, the method for switching a call provided in this embodiment is implemented, and in order to avoid repeated descriptions, specific steps of the method are not described herein again.
It will be understood by those of ordinary skill in the art that all or some of the steps of the above inventive method, systems, functional modules/units in the apparatus may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.
It should be noted that, in this document, 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 phrases "comprising a component of' 8230; \8230;" does not exclude the presence of another like element in a process, method, article, or apparatus that comprises the element.
Those skilled in the art will appreciate that although some embodiments described herein include some features included in other embodiments, not others, combinations of features of different embodiments are meant to be within the scope of the embodiments and form different embodiments.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (10)
1. A call switching method is applied to a base station device to which a called terminal belongs, and comprises the following steps:
receiving a bearer modification request sent by core network equipment; the bearer modification request is used for requesting to increase the bearer of the video stream in the voice session process of the calling terminal and the called terminal;
acquiring all bearers sent to the base station equipment by the core network equipment;
sequencing all the obtained bearers according to the bearer creation time to obtain a bearer sequence;
and sequentially processing the bearing sequence, and sending a video call request to the called terminal after the bearing contained in the bearing modification request is processed, so as to switch the voice call between the calling terminal and the called terminal into a video call.
2. The method according to claim 1, wherein the sorting all obtained bearers according to bearer creation time to obtain a bearer sequence comprises:
detecting the creation time of each bearer in all the bearers;
acquiring the load bearing within a preset time threshold range from all the load bearings;
and sequencing the bearers within the preset time threshold range according to the creation time of each bearer to obtain the bearer sequence.
3. A call switching method is applied to a calling terminal, and comprises the following steps:
in the process of voice conversation with a called terminal, sending a re-request message to core network equipment according to the video conversation requirement, so as to send a bearing modification request to base station equipment to which the called terminal belongs through the core network equipment according to the video conversation requirement, wherein the bearing modification request is used for requesting to increase the bearing of a video stream in the process of the voice conversation;
responding to a video answering consent message from the called terminal, and carrying out video call with the called terminal;
the video answering approval message is a message sent to the calling terminal by the called terminal after responding to a video call request sent by the base station equipment and selecting to approve video answering; the video call request is a video call request sent to the called terminal after the base station device responds to the bearer modification request, sequentially processes all obtained bearers sent to the base station device by the core network device according to bearer creation time, and processes the bearers contained in the bearer modification request.
4. The method of claim 3, wherein before sending the re-request message to the core network device according to the video session requirement during the voice session with the called terminal, the method further comprises:
sending a voice call request to the called terminal, wherein the voice call request carries a contact accepting header field containing a media type label, and the media type label is used for representing that the calling terminal has voice service capability;
and receiving a session response message sent by the called terminal, wherein the session response message comprises the media type label and the video label, and the media type label and the video label are used for representing that the called terminal has voice service capability and video service capability.
5. The method of claim 4, wherein before sending the voice call request to the called terminal, the method further comprises:
sending an initial request to the called terminal, wherein the initial request does not carry a session protocol offer message;
receiving an initial request response message which is sent by the called terminal and carries a session protocol proposal message, wherein the session protocol proposal message carries audio information, and the audio information comprises at least one media line;
and sending a session protocol response message to the called terminal, wherein the session protocol response message carries the coding mode set for each media line.
6. The method of claim 4, further comprising:
if the call based on the voice call request is not established and meets a preset condition, a cancellation request is sent to the called terminal within a preset time range, and the cancellation request is used for canceling the voice call request; wherein the predetermined time range is: after receiving a temporary response of the called terminal to the voice call request, and within a time range before receiving a final response message.
7. The method of claim 4, wherein after sending the voice call request to the called terminal, the method further comprises:
and under the condition that a ringing message sent by the called terminal is received and the called terminal does not answer, sending a cancellation request to the called terminal after a first preset time, wherein the cancellation request is used for canceling the voice call request.
8. A base station device to which a called terminal belongs, comprising:
a receiving module, configured to receive a bearer modification request sent by a core network device; the bearer modification request is used for requesting to increase the bearer of the video stream in the voice session process of the calling terminal and the called terminal;
an obtaining module, configured to obtain all bearers sent by the core network device to the base station device;
the sequencing module is used for sequencing all the obtained bearers according to the bearer creation time to obtain a bearer sequence;
and the processing module is used for sequentially processing the bearing sequence, and sending a video call request to the called terminal after the bearing contained in the bearing modification request is processed, so as to switch the voice call between the calling terminal and the called terminal into a video call.
9. A calling terminal, comprising:
a sending module, configured to send a re-request message to a core network device according to a video session requirement in a voice session with a called terminal, so as to send a bearer modification request to a base station device to which the called terminal belongs through the core network device according to the video session requirement, where the bearer modification request is used to request to add a bearer of a video stream in the voice session;
the call module is used for responding to the video answering consent message from the called terminal and carrying out video call with the called terminal;
the video answering approval message is a message sent to the calling terminal by the called terminal after responding to a video call request sent by the base station equipment and selecting to approve video answering; the video call request is a video call request sent to the called terminal after the base station device responds to the bearer modification request, sequentially processes all obtained bearers sent to the base station device by the core network device according to bearer creation time, and processes the bearers contained in the bearer modification request.
10. An electronic device, comprising:
one or more processors;
a memory having one or more programs stored thereon that, when executed by the one or more processors, cause the one or more processors to implement the call handover method of any one of claims 1-2 or any one of claims 3-7;
one or more I/O interfaces connected between the processor and the memory and configured to enable information interaction between the processor and the memory.
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