CN112105067A

CN112105067A - Switching method and device based on voice service

Info

Publication number: CN112105067A
Application number: CN201910528376.2A
Authority: CN
Inventors: 冯强; 蔡志勇; 胡国峰; 余伟大; 朱峰
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Group Zhejiang Co Ltd
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Group Zhejiang Co Ltd
Priority date: 2019-06-18
Filing date: 2019-06-18
Publication date: 2020-12-18
Anticipated expiration: 2039-06-18
Also published as: CN112105067B

Abstract

The invention discloses a switching method and a switching device based on voice services. The switching method based on the voice service comprises the following steps: a user equipment to be accessed with VOLTE voice service establishes a bearing link with an LTE network; judging whether the VOLTE voice service initiates SRVCC switching or not; if SRVCC switching is initiated, the VOLTE voice service is switched to a GSM network, and an LTE network identifier is issued; when the user equipment is borne in the GSM network, LTE network signal measurement is carried out according to the LTE network identification, and when the LTE network signal meets the user equipment residence condition, the GSM network is switched to the LTE network, so that the user equipment can be switched back to the LTE network in time after falling back to the GSM network under the condition that the LTE network signal is recovered, the call quality of VOLTE voice service is improved, and the user experience perception is improved.

Description

Switching method and device based on voice service

Technical Field

The invention relates to the technical field of communication, in particular to a switching method and a switching device based on voice services.

Background

The existing interoperation scheme for switching a GSM network (2G network) back to an LTE network (4G network) is that the LTE network falls back to the GSM network, and returns to the LTE network after the service is completed. The modes for returning to the LTE network mainly include: the terminal autonomously performs FR, the FR is set at the network side, the terminal returns to the LTE network through 3G bridging, and the terminal reselects and returns to 4G, so that the perception of the user is obviously reduced after the user equipment falls back to the GSM in the 4 modes.

The following description describes the implementation principles of 4 ways:

the terminal-independent FR means that the user equipment does not depend on the network to send information to be returned to the 4G network, and when the occupied GSM network is in an idle state, the user equipment returns the information of the last 4G network measured during the startup/standby and conversation periods, and the time delay difference is about 1 s;

the FR set by the network side means that after voice release, the BSC sends an RRC release message, the message carries a frequency point of LTE as a redirection frequency point (the FR function from 2G to 4G needs to be started by GSM), wherein part of CSFB user equipment does not have an autonomous FR function and is quickly returned to an LTE network through network designation by GSM;

the LTE network is returned through 3G bridging, namely an interoperation mode that the LTE network is returned through a 2G- >3G- >4G bridging mode is adopted, specifically, user equipment resides in the 2G network, the TDS neighbor cell information is broadcasted according to 2G to return to the 3G network, then the LTE neighbor cell information is broadcasted according to TDS to return to the 4G network, a terminal is required to support TDS, and the TDS coverage range is larger than that of LTE;

the 2G reselection returning to the 4G means that the user equipment resides in a GSM network, and directly reselects the 4G network after meeting a signal strength condition according to 4G neighboring cell information broadcasted by the 2G;

when the TD-LTE user equipment reselects from 2G to 4G, the TD-LTE user equipment needs to satisfy the following 3 conditions and maintain 5s (protocol specification) to reselect to a 4G cell: (1) the priority of the 4G frequency point is higher than that of the 2G service cell; (2) the user equipment reads the SI2Quater message and extracts the 4G frequency points for scanning; (3) RSRP > -110 dBm.

At present, a user mainly returns to LTE (Long term evolution) in a terminal-independent FR (resource recovery), network configuration FR (resource recovery), bridging and reselection modes on a GSM (global system for mobile communications) network, and after user equipment falls back to the GSM network, the user equipment cannot return to the LTE network in time under the condition that LTE network signals are good, so that the problem of poor user perception is caused.

Disclosure of Invention

In view of the above, the present invention is proposed in order to provide a handover method and apparatus based on voice service that overcomes or at least partially solves the above problems.

According to an aspect of the present invention, there is provided a handover method based on a voice service, including:

a user equipment to be accessed with VOLTE voice service establishes a bearing link with an LTE network;

judging whether the VOLTE voice service initiates SRVCC switching or not;

if SRVCC switching is initiated, the VOLTE voice service is switched to a GSM network, and an LTE network identifier is issued;

when the user equipment is borne in the GSM network, the LTE network signal measurement is carried out according to the LTE network identifier, and when the LTE network signal meets the user equipment residence condition, the GSM network is switched to the LTE network.

According to another aspect of the present invention, there is provided a switching apparatus based on voice service, including:

the establishing module is suitable for establishing a bearing link between user equipment to be accessed with VOLTE voice service and an LTE network;

the first judgment module is suitable for judging whether the VOLTE voice service initiates SRVCC switching or not;

the switching module is suitable for switching the VOLTE voice service to a GSM network and issuing an LTE network identifier if SRVCC switching is initiated; when the LTE network signal meets the user equipment residence condition, switching from the GSM network to the LTE network;

and the measurement module is suitable for carrying out LTE network signal measurement according to the LTE network identifier when the user equipment is carried in the GSM network.

According to still another aspect of the present invention, there is provided an electronic apparatus including: the processor, the memory and the communication interface complete mutual communication through the communication bus;

the memory is used for storing at least one executable instruction, and the executable instruction enables the processor to execute the operation corresponding to the switching method based on the voice service.

According to still another aspect of the present invention, there is provided a computer storage medium having at least one executable instruction stored therein, where the executable instruction causes a processor to perform operations corresponding to the above-mentioned voice service based handover method.

According to the scheme provided by the invention, the user equipment to be accessed with VOLTE voice service establishes a bearing link with the LTE network; judging whether the VOLTE voice service initiates SRVCC switching or not; if SRVCC switching is initiated, the VOLTE voice service is switched to a GSM network, and an LTE network identifier is issued; when the user equipment is borne in the GSM network, LTE network signal measurement is carried out according to the LTE network identification, and when the LTE network signal meets the user equipment residence condition, the GSM network is switched to the LTE network, so that the user equipment can be switched back to the LTE network in time after falling back to the GSM network under the condition that the LTE network signal is recovered, the call quality of VOLTE voice service is improved, and the user experience perception is improved.

The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

fig. 1 is a flowchart illustrating a handover method based on voice service according to an embodiment of the present invention;

fig. 2 is a flowchart illustrating a handover method based on a voice service according to another embodiment of the present invention;

fig. 3 is a schematic structural diagram of a switching apparatus based on voice service according to an embodiment of the present invention;

fig. 4 shows a schematic structural diagram of an electronic device according to an embodiment of the invention.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

Fig. 1 is a flowchart illustrating a handover method based on a voice service according to an embodiment of the present invention. As shown in fig. 1, the method comprises the steps of:

step S101, a user equipment to be accessed with VOLTE voice service establishes a bearing link with an LTE network.

Before performing VOLTE voice service, the ue needs to establish a bearer link with the LTE network, specifically, the ue registers in the IMS domain, establishes a bearer of QCI5, and needs to establish a dedicated bearer of QCI 1. The QCI5 is a default signaling bearer for VOLTE, and mainly bears 4G voice IMS signaling related content; QCI1 is used to transmit voice. The QCI5 and QCI1 are not described in detail here, and are the same as the existing bearers for establishing QCI1 and QCI 5.

Step S102, judging whether VOLTE voice service initiates SRVCC switching, if yes, executing step S103.

SRVCC handover is when a user equipment moves from LTE to CS domain (corresponding GSM network), a CS domain call leg is established, and the CS leg is connected with the original IMS to a call leg by SCC AS anchor point, thereby forming a complete call chain and keeping IMS domain calls going on after handover.

Whether the VOLTE voice service initiates SRVCC handover is judged, so as to determine whether to handover to a GSM network.

And step S103, switching the VOLTE voice service to the GSM network and issuing an LTE network identifier.

And when the SRVCC is switched, the LTE network identifier is issued to the GSM network, and the fact that the LTE network is switched to the GSM network instead of the user equipment is in the GSM network per se can be determined by issuing the LTE network identifier.

And step S104, when the user equipment is borne in the GSM network, carrying out LTE network signal measurement according to the LTE network identifier, and when the LTE network signal meets the user equipment residence condition, switching to the LTE network from the GSM network.

Since the LTE network identifier is issued to the GSM network in step S103, when the ue is loaded in the GSM network, it can be determined that the ue is switched from the LTE network to the GSM network according to the LTE network identifier, in order to improve the call quality of the VOLTE voice service and improve the user experience perception, the LTE network signal needs to be measured, the measurement process is performed continuously in real time, and it is determined whether the ue can be switched back to the LTE network by measuring the LTE network signal, and when the LTE network signal meets the ue residence condition, the ue is switched from the GSM network to the LTE network.

The scheme of the invention establishes a bearing link between the user equipment to be accessed with VOLTE voice service and the LTE network; judging whether the VOLTE voice service initiates SRVCC switching or not; if SRVCC switching is initiated, the VOLTE voice service is switched to a GSM network, and an LTE network identifier is issued; when the user equipment is borne in the GSM network, LTE network signal measurement is carried out according to the LTE network identification, and when the LTE network signal meets the user equipment residence condition, the GSM network is switched to the LTE network, so that the user equipment can be switched back to the LTE network in time after falling back to the GSM network under the condition that the LTE network signal is recovered, the call quality of VOLTE voice service is improved, and the user experience perception is improved.

Fig. 2 is a flowchart illustrating a handover method based on a voice service according to another embodiment of the present invention. As shown in fig. 2, the method comprises the steps of:

step S201, a user equipment to be accessed with the VOLTE voice service establishes a bearer link with the LTE network.

Step S202, determining whether the LTE network signal under the VOLTE voice service is smaller than a preset threshold, if so, executing step S203.

The VOLTE voice service has a certain requirement on signals of an LTE network, the LTE network signals need to be larger than or equal to a preset threshold value, and the VOLTE voice service can be normally used by user equipment in the LTE network. Therefore, when using the VOLTE voice service, it needs to be determined whether the LTE network signal is smaller than the preset threshold, if the LTE network signal is smaller than the preset threshold, it can be determined that the VOLTE voice service initiates SRVCC handover, and if not, the method ends.

In an actual situation, there may be a portion of user equipment that does not support SRVCC handover, and for this portion of terminal equipment, the terminal equipment is carried in a GSM network through Circuit Switched Fallback (CSFB), and when the terminal equipment is handed over to the GSM network through this method, the LTE network identifier is not issued.

Step S203, determining VOLTE voice service to initiate SRVCC switching, switching the VOLTE voice service to a GSM network, and issuing an LTE network identifier.

Under the condition that the LTE network signal is smaller than the preset threshold value under the VOLTE voice service, the VOLTE voice service can be determined to initiate SRVCC switching, the VOLTE voice service is switched from the LTE network to the GSM network, the continuity of the VOLTE voice service is ensured by switching to the GSM network, the LTE network identification is issued to the GSM network while SRVCC switching is carried out, and the LTE network identification is issued to determine that the VOLTE voice service is switched from the LTE network to the GSM network, but not the user equipment is in the GSM network.

In practical situations, part of the ue may be in the GSM network all the time, instead of falling back from the LTE network to the GSM network, and by issuing the LTE network identifier, it may be determined whether the ue needs to switch back to the LTE network.

Step S204, when the ue is loaded in the GSM network, determining whether the ue carries an LTE network identifier, and if yes, performing step S205.

The GSM network is a 2G network, VOLTE voice service can be used in the GSM network, but the VOLTE voice service is not as good in use quality as that in the LTE network, so that when user equipment is borne in the GSM network, whether LTE signals need to be measured or not can be determined by judging whether LTE network identification is carried or not, whether the user equipment measures the LTE network signals or not is determined, and the LTE network signals are switched to the LTE network when the LTE network signals meet the residence conditions; if the LTE network is carried, the LTE network signal is considered to be required to be measured, and if the LTE network identifier is not carried, the method is ended.

And step S205, carrying out LTE network signal measurement according to the LTE network identifier.

Step S206, if the LTE network signal meets the user equipment residence condition, a measurement report is sent to the base station, so that the base station sends a switching control command to the user equipment according to the measurement report.

Under the condition that the user equipment determines to carry the LTE network identifier, the user equipment measures the LTE network signal, mainly measures the intensity of the RSRP signal. When the RSRP signal is determined to meet the user equipment residing condition, the switching event is determined to be met, the user equipment reports the measurement report to the base station, wherein the fact that the LTE network signal meets the user equipment residing condition is specifically that: the LTE network signal is greater than or equal to a preset threshold and reaches a preset time delay, and the preset threshold and the preset time delay are set by a person skilled in the art according to a protocol; when the RSRP signal is smaller than the preset threshold value, the switching event is determined not to be satisfied, and at the moment, the user equipment does not report the measurement report, namely, the measurement report is sent to the base station only when the LTE network signal satisfies the user equipment residence condition, so that the quantity of the measurement report processed by the base station is reduced. After receiving the measurement report, the base station considers that the LTE network signal meets the requirements of the VOLTE voice service, and can send a switching control command to the user equipment to control the user equipment to be switched from the GSM network to the LTE network.

Step S207, receiving a switching control command of the base station, and switching from the GSM network to the LTE network according to the switching control command.

And the base station returns a switching control command to the user equipment under the condition of determining that the switching event is met according to the measurement report, and the user equipment receives the switching control returned by the base station and switches from the GSM network to the LTE network according to the switching control command.

The scheme of the invention judges whether LTE network signals under VOLTE voice service are smaller than a preset threshold value by establishing a bearing link between user equipment to be accessed with VOLTE voice service and an LTE network, if so, the VOLTE voice service is determined to initiate SRVCC switching, the VOLTE voice service is switched to the GSM network, and LTE network identification is issued, when the user equipment is borne on the GSM network, whether the LTE network identification is carried or not is judged, if so, LTE network signal measurement is carried out according to the LTE network identification, if the LTE network signals meet the user equipment residence conditions, a measurement report is sent to a base station, so that the base station sends a switching control command to the user equipment according to the measurement report, receives the switching control command of the base station, the GSM network is switched to the LTE network according to the switching control command, and after the user equipment is switched to the GSM network through SRVCC, the user equipment can timely measure the LTE network signals according to the carried LTE network identification, under the condition that LTE network signals are recovered well, the user equipment is timely switched back to the LTE network after falling back to the GSM network, the call quality of VOLTE voice services is improved, user experience perception is improved, and the defect of an algorithm mechanism for returning LTE to the existing GSM network is overcome. In addition, the invention makes up the defect that the existing coverage-based SRVCC switching algorithm triggers SRVCC only aiming at the call under the downlink weak coverage environment, monitors the uplink coverage condition of VOLTE call in real time, and transmits the uplink weak coverage VOLTE voice service SRVCC to the GSM network, thereby improving the perception of the client.

Fig. 3 is a schematic structural diagram of a switching apparatus based on voice service according to an embodiment of the present invention. As shown in fig. 3, the apparatus includes: the device comprises an establishing module 301, a first judging module 302, a switching module 303 and a measuring module 304.

The establishing module 301 is adapted to establish a bearer link between the user equipment to be accessed with the VOLTE voice service and the LTE network;

a first determining module 302, adapted to determine whether the VOLTE voice service initiates SRVCC handover;

the switching module 303 is adapted to switch the VOLTE voice service to the GSM network and issue an LTE network identifier if SRVCC handover is initiated; when the LTE network signal meets the user equipment residence condition, switching from the GSM network to the LTE network;

and the measurement module 304 is adapted to perform LTE network signal measurement according to the LTE network identifier when the user equipment is carried in the GSM network.

Optionally, the apparatus further comprises: the second judging module is suitable for judging whether the user equipment carries the LTE network identifier or not when the user equipment is borne in the GSM network;

the measurement module is further adapted to: and if the LTE network identifier is carried, measuring the LTE network signal.

Optionally, the switching module is further adapted to: if the LTE network signal meets the user equipment residence condition, sending a measurement report to the base station so that the base station can send a switching control command to the user equipment according to the measurement report;

and receiving a switching control command returned by the base station, and switching from the GSM network to the LTE network according to the switching control command.

Optionally, the first determining module is further adapted to: judging whether an LTE network signal under VOLTE voice service is smaller than a preset threshold value;

and if so, determining that the VOLTE voice service initiates SRVCC switching.

Optionally, the specific condition that the LTE network signal satisfies the ue camping condition is: the LTE network signal is greater than or equal to a preset threshold value and reaches a preset time delay.

The embodiment of the invention also provides a nonvolatile computer storage medium, wherein the computer storage medium stores at least one executable instruction, and the computer executable instruction can execute the switching method based on the voice service in any method embodiment.

Fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present invention, and the specific embodiment of the present invention does not limit the specific implementation of the electronic device.

As shown in fig. 4, the electronic device may include: a processor (processor), a Communications Interface (Communications Interface), a memory (memory), and a Communications bus.

Wherein:

the processor, the communication interface, and the memory communicate with each other via a communication bus.

A communication interface for communicating with network elements of other devices, such as clients or other servers.

The processor is configured to execute a program, and may specifically execute relevant steps in the foregoing switching method embodiment based on the voice service.

In particular, the program may include program code comprising computer operating instructions.

The processor may be a central processing unit CPU or an application Specific Integrated circuit asic or one or more Integrated circuits configured to implement embodiments of the present invention. The electronic device comprises one or more processors, which can be the same type of processor, such as one or more CPUs; or may be different types of processors such as one or more CPUs and one or more ASICs.

And the memory is used for storing programs. The memory may comprise high-speed RAM memory, and may also include non-volatile memory (non-volatile memory), such as at least one disk memory.

The program may specifically be configured to cause the processor to execute the handover method based on the voice service in any of the method embodiments described above. For specific implementation of each step in the program, reference may be made to corresponding steps and corresponding descriptions in units in the foregoing switching embodiment based on the voice service, which are not described herein again. It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described devices and modules may refer to the corresponding process descriptions in the foregoing method embodiments, and are not described herein again.

The algorithms and displays presented herein are not inherently related to any particular computer, virtual machine, or other apparatus. Various general purpose systems may also be used with the teachings herein. The required structure for constructing such a system will be apparent from the description above. Moreover, the present invention is not directed to any particular programming language. It is appreciated that a variety of programming languages may be used to implement the teachings of the present invention as described herein, and any descriptions of specific languages are provided above to disclose the best mode of the invention.

In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: that the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.

Those skilled in the art will appreciate that the modules in the device in an embodiment may be adaptively changed and disposed in one or more devices different from the embodiment. The modules or units or components of the embodiments may be combined into one module or unit or component, and furthermore they may be divided into a plurality of sub-modules or sub-units or sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.

Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments may be used in any combination.

The various component embodiments of the invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art will appreciate that a microprocessor or Digital Signal Processor (DSP) may be used in practice to implement some or all of the functions of some or all of the components in a voice service based switching apparatus according to embodiments of the present invention. The present invention may also be embodied as apparatus or device programs (e.g., computer programs and computer program products) for performing a portion or all of the methods described herein. Such programs implementing the present invention may be stored on computer-readable media or may be in the form of one or more signals. Such a signal may be downloaded from an internet website or provided on a carrier signal or in any other form.

It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.

Claims

1. A switching method based on voice service comprises the following steps:

judging whether the VOLTE voice service initiates SRVCC switching or not;

and when the user equipment is borne in the GSM network, carrying out LTE network signal measurement according to the LTE network identifier, and when the LTE network signal meets the user equipment residence condition, switching to the LTE network from the GSM network.

2. The method of claim 1, wherein prior to making LTE network signal measurements in accordance with the LTE network identity when user equipment is hosted by the GSM network, the method further comprises:

when the user equipment is borne in the GSM network, judging whether the LTE network identifier is carried or not;

and if the LTE network mark is carried, measuring the LTE network signal.

3. The method of claim 1 or 2, wherein the switching from the GSM network to the LTE network if the LTE network signal satisfies the ue camping condition further comprises:

if the LTE network signal meets the user equipment residence condition, sending a measurement report to a base station so that the base station sends a switching control command to the user equipment according to the measurement report;

4. The method of claim 1 or 2, wherein the determining whether the VOLTE voice service initiates an SRVCC handover further comprises:

judging whether an LTE network signal under VOLTE voice service is smaller than a preset threshold value;

and if so, determining that the VOLTE voice service initiates SRVCC switching.

5. The method according to claim 1 or 2, wherein the LTE network signal satisfying the ue camping condition is specifically: the LTE network signal is greater than or equal to a preset threshold value and reaches a preset time delay.

6. A switching device based on voice service, comprising:

and the measurement module is suitable for carrying out LTE network signal measurement according to the LTE network identifier when the user equipment is borne in the GSM network.

7. The apparatus of claim 6, wherein the apparatus further comprises:

the second judging module is suitable for judging whether the LTE network identifier is carried or not when the user equipment is borne in the GSM network;

the measurement module is further adapted to: and if the LTE network mark is carried, measuring the LTE network signal.

8. The apparatus of claim 6 or 7, wherein the switching module is further adapted to:

9. An electronic device, comprising: the system comprises a processor, a memory, a communication interface and a communication bus, wherein the processor, the memory and the communication interface complete mutual communication through the communication bus;

the memory is used for storing at least one executable instruction, and the executable instruction causes the processor to execute the operation corresponding to the switching method based on the voice service according to any one of claims 1-5.

10. A computer storage medium having at least one executable instruction stored therein, the executable instruction causing a processor to perform operations corresponding to the voice service based handover method according to any one of claims 1 to 5.