CN106804049B - Inter-system switching method and device - Google Patents
Inter-system switching method and device Download PDFInfo
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- CN106804049B CN106804049B CN201510843577.3A CN201510843577A CN106804049B CN 106804049 B CN106804049 B CN 106804049B CN 201510843577 A CN201510843577 A CN 201510843577A CN 106804049 B CN106804049 B CN 106804049B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
- H04W36/0022—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/14—Reselecting a network or an air interface
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Abstract
The invention discloses a method and a device for switching different systems. In the method, a base station determines a terminal to be switched among different systems; if the terminal establishes a bearer for VOLTE data transmission but VOLTE voice communication is not carried out through the bearer, the inter-system switching is not carried out on the terminal temporarily, and the inter-system switching is carried out on the terminal after the VOLTE voice communication is carried out through the bearer is detected. The invention avoids the switching failure caused by simultaneously initiating the voice call of VOLTE when switching the different systems.
Description
Technical Field
The present invention relates to the field of wireless communications technologies, and in particular, to a method and an apparatus for inter-system handover.
Background
LTE (Long Term Evolution) is a Long Term Evolution of The UMTS (Universal mobile telecommunications System) technical standard established by The 3GPP (The 3rd generation partnership Project) organization. The problem of Voice transmission in an LTE network is often solved by LTE network direct transmission, i.e., Voice over LTE (Voice over LTE, Voice service over LTE network), and high-quality Voice and video calls carried on the LTE network are realized by VOLTE.
GSM (Global System for Mobile Communication) is currently the most widely used Mobile phone standard. The technology of GSM is mature, equipment is stable, the cost performance is high, the GSM is a main solution of the current voice service, and the GSM still has development space for a long time in the future.
It is expected that LTE, GSM networks will coexist for a long time in the future, and this networking strategy puts a strong demand on the interoperability between LTE and GSM systems. However, when the user reaches the inter-system handover condition and prepares to handover from LTE to GSM, if the user initiates a VOLTE voice call based on SIP (Session Initiation Protocol), the base station does not know the SIP application layer signaling process, which may result in a handover failure.
Disclosure of Invention
The embodiment of the invention provides a method and a device for switching different systems, which are used for reducing switching failure caused by the fact that a terminal simultaneously initiates voice call of VOLTE when switching from an LTE system to a GSM system.
An embodiment of the present invention provides a method for inter-system handover, including:
a base station determines a terminal to be subjected to inter-system switching;
if the terminal establishes a bearer for VOLTE data transmission of voice service on an LTE network, but VOLTE voice communication is not carried out through the bearer, the inter-system switching is not carried out on the terminal temporarily, and the inter-system switching is carried out on the terminal after the VOLTE voice communication is carried out through the bearer is detected.
Specifically, whether the terminal carries out VOLTE voice call through the bearer is detected in the following way:
detecting data traffic on the bearer;
if the flow of each first duration exceeds one data packet, the terminal carries out VOLTE voice call through the bearer; otherwise, the terminal does not carry out VOLTE voice call through the bearer; the first duration is the length of a data packet transmission period of a silence period of the VOLTE voice service.
Before the base station determines a terminal to be subjected to inter-system switching, starting a monitoring thread for the terminal when detecting that the terminal establishes a bearer for VOLTE data transmission;
releasing a monitoring thread for the terminal after detecting that the terminal carries out VOLTE voice call through the bearer;
the base station determines a terminal to be switched among different systems, and the method comprises the following steps:
and for the terminal with the started monitoring thread, if a measurement report for switching between different systems sent by the terminal is received, determining that the terminal is a terminal to be subjected to different systems, and detecting whether the terminal carries out VOLTE voice call through the bearer.
Before the base station determines a terminal to be subjected to inter-system handover, if the base station detects that the terminal establishes a bearer for VOLTE data transmission and the terminal reports an A2 measurement report, a monitoring thread for the terminal is started.
The bearer for VOLTE data transmission refers to a bearer with a quality of service class QCI ═ 1.
An embodiment of the present invention provides a base station, including:
the determining module is used for determining a terminal to be subjected to different system switching;
and the inter-system switching module is used for temporarily not switching the inter-system of the terminal if the terminal establishes a bearer for VOLTE data transmission of voice service on an LTE network but does not carry out VOLTE voice call through the bearer, and switching the inter-system of the terminal after detecting that the terminal carries out VOLTE voice call through the bearer.
The base station further comprises a detection module for detecting whether the terminal carries out VOLTE voice call through the bearer in the following way:
detecting data traffic on the bearer;
if the flow of each first duration exceeds one data packet, the terminal carries out VOLTE voice call through the bearer; otherwise, the terminal does not carry out VOLTE voice call through the bearer; the first duration is the length of a data packet transmission period of a silence period of the VOLTE voice service.
The base station also comprises a monitoring module, which is used for starting a monitoring thread to the terminal when the base station detects that the terminal establishes a bearer for VOLTE data transmission before determining the terminal to be subjected to inter-system switching; releasing a monitoring thread for the terminal after detecting that the terminal carries out VOLTE voice call through the bearer;
the determining module is specifically configured to, for a terminal with a monitoring thread being started, determine that the terminal is a terminal to be subjected to inter-system handover if a measurement report for inter-system handover sent by the terminal is received, and instruct the detecting module to detect whether the terminal is performing VOLTE voice call through the bearer.
The monitoring module is specifically configured to, before the determining module determines the terminal to be subjected to inter-system handover, detect that the terminal establishes a bearer for VOLTE data transmission, and if the terminal reports an a2 measurement report, start a monitoring thread for the terminal.
The bearer for VOLTE data transmission refers to a bearer with a quality of service class QCI ═ 1.
In the above embodiment of the present invention, if the base station determines that the bearer for the VOLTE data transmission is established for the terminal that needs to perform inter-system handover and the VOLTE voice call is not performed yet, the inter-system handover is not performed temporarily, and the terminal is switched to the inter-system after the VOLTE voice call is performed, so that a handover failure caused by the voice call of the VOLTE being initiated simultaneously when the inter-system handover is performed is avoided.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic flow chart of a inter-system handover method according to an embodiment of the present invention;
fig. 2 is a schematic diagram of three states included in the VOLTE voice service in the prior art;
fig. 3 is a schematic flowchart of a inter-system handover method according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a base station according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Srvcc (single Radio Voice continuity) is a Voice Over LTE (VOLTE) service continuity scheme proposed by 3GPP, and mainly aims to solve the problem of how to ensure Voice Call continuity when a single Radio frequency terminal moves between an LTE network and a 2G (2-Generation wireless telephone technology, second Generation mobile communication technology)/3G (3rd-Generation, third Generation mobile communication technology) CS (Circuit Switched) network, that is, to ensure smooth handover between VoIP (Voice over Internet Protocol) Voice and CS domain Voice controlled by an IMS (IP Multimedia Subsystem). VOLTE is a voice services standard based on IMS networks. SIP is an application-layer signaling control protocol for creating, modifying, and releasing sessions for one or more participants, and can be used in a wide variety of applications and services, including interactive gaming, music and video-on-demand, and voice, video, and Web conferencing.
The IMS framework based on SIP can provide QoS (Quality of Service) guarantee by reusing Internet technology and protocol to the maximum extent, inheriting the specific network technology of the cellular mobile communication system and fully borrowing the soft switching network technology, and has strong capability of fusing various network comprehensive services. VOLTE is an application of the SIP-based IMS framework.
However, SIP belongs to an application layer protocol and is invisible to the base station side, so when a user switches from the LTE system to the GSM system, a voice call of VOLTE is initiated at the same time, resulting in a handover failure.
In view of the above problems, an embodiment of the present invention provides a method for inter-system handover, so as to solve the problem in the prior art that a handover failure occurs due to a voice call of VOLTE being initiated simultaneously during inter-system handover.
Referring to fig. 1, a schematic flow chart of the inter-system handover method according to the embodiment of the present invention is shown, where the flow chart may include the following steps:
step 101: and the base station determines the terminal to be subjected to the inter-system switching.
In general, the base station may configure the terminal to perform measurement for inter-system handover, and perform measurement based on the measurement configuration and report a measurement report after a condition indicated by the measurement configuration is satisfied. If the base station receives a measurement report for inter-system handover sent by the terminal, the base station may determine the terminal as a terminal to be subjected to inter-system handover.
Step 102: the base station judges whether the terminal establishes a bearer for VOLTE data transmission but does not perform VOLTE voice call through the bearer; if the above conditions are satisfied, the process proceeds to step 103, otherwise, the process proceeds to step 104.
Specifically, the bearer for VOLTE data transmission refers to a bearer whose QCI (QoS Class Identifier) is 1.
QCI is a scale value used to measure specific packet forwarding behaviors provided for SDF (Service Data Flow), such as packet loss Rate, packet delay budget, etc., and is applied to both GBR (Guaranteed Bit Rate) and Non-GBR (Non-Guaranteed Bit Rate) bearers, and is used to specify the control bearer level packet forwarding modes defined in the access node, such as scheduling weight, admission threshold, queue management threshold, link layer protocol configuration, etc., which are pre-configured by the operator to the access network node.
The bearer with QCI-1 is used for serving voice call, and the bearer with QCI-5 is used for serving to send IMS signal, which can be used for transmitting SIP signaling.
Specifically, the base station may detect whether the terminal performs VOLTE voice call through a bearer for VOLTE data transmission by the following method:
detecting data flow on a bearer with QCI (quaternary QCI-1), and if the flow of each first duration exceeds one data packet, carrying out VOLTE voice call by the terminal through the bearer; otherwise, the terminal does not perform VOLTE voice call through the bearer. The first duration is the length of a data packet transmission period of a silence period of the VOLTE voice service.
The VOLTE voice service includes two states, as shown in fig. 2:
and (3) a conversation period: refers to a state corresponding to a user in a call, in which one packet is transmitted every 20 ms. The packet size during the active period depends on the coding rate currently engaged.
A silent period: the method is characterized in that a data packet is sent every 160ms corresponding to the state that a user is in a call pause state, the data packet is a very short SID (Silence instruction Descriptor) frame, and the SID frame is a noise frame sent to improve the user experience.
The base station detects whether the terminal carries out VOLTE voice call through the load for VOLTE data transmission, namely whether the terminal is in a call period. If the base station detects that the flow of the terminal exceeds one data packet every 160ms, it indicates that the terminal is in a call period, that is, the terminal performs VOLTE voice call through a bearer for VOLTE data transmission.
Step 103: and the base station temporarily does not perform inter-system switching on the terminal, and performs inter-system switching on the terminal after detecting that the terminal performs VOLTE voice call through the bearer.
The terminal establishes a bearer for VOLTE data transmission, but VOLTE voice call is not carried out through the bearer, and if the terminal is switched by different systems at the moment, the switching failure is caused because the base station is invisible to the SIP signaling of an application layer.
Step 104: and the base station performs inter-system switching on the terminal.
If the terminal does not establish the bearer for the VOLTE data transmission, the handover failure caused by simultaneously initiating the voice call of the VOLTE during the system handover does not occur, so that the inter-system handover can be performed on the terminal. If the terminal has already carried out VOLTE voice call through the bearer, the problem can not be caused, and the different systems can be switched.
Optionally, before performing step 101, the base station may further start a monitoring thread for the terminal when detecting that the terminal establishes a bearer for VOLTE data transmission; and releasing the monitoring thread of the terminal after detecting that the terminal carries out VOLTE voice call through the bearer.
And for the terminal with the monitoring thread started, if the base station receives a measurement report for switching between different systems, which is sent by the terminal, determining that the terminal is a terminal to be subjected to different systems, and detecting whether the terminal is subjected to VOLTE voice call through the bearer.
The base station may start the monitoring thread for all terminals that have established bearers for VOLTE data transmission, or may start the monitoring thread only for specific terminals that have established bearers for VOLTE data transmission.
Preferably, the base station detects that the terminal establishes a bearer for VOLTE data transmission, and the terminal reports an a2 measurement report, and then starts a monitoring thread for the terminal.
In order to reduce the processing amount of the base station, the monitoring thread described in the above embodiment may be performed only on the terminal at the cell edge, and the cell center user is not monitored. Because the a2 measurement report reported by the terminal is triggered by an event, if the RSRP (Reference Signal Receiving Power) value of the serving cell to which the terminal is currently connected is less than the threshold, the terminal reports the measurement report. Therefore, the terminal reports an a2 measurement report, which indicates that the terminal is in a non-central position of the currently connected serving cell, and an inter-system handover may be required.
In order to more clearly understand the above embodiments of the present invention, a specific implementation process of the above embodiments of the present invention is described below by taking a specific application as an example.
The base station starts a monitoring thread only for the terminal which has reported the a2 measurement report and established the bearer for the VOLTE data transmission, and the terminal is used for the bearer whose VOLTE data transmission is QCI 1. The specific process can be shown in fig. 3, and includes the following steps:
step 301: the base station issues an A2 measurement instruction to the terminal accessing the base station.
Step 302: for the terminal reporting the a2 measurement report, it detects whether it establishes a bearer with QCI ═ 1, and if the bearer with QCI ═ 1 is established, the procedure goes to step 303, otherwise, the procedure goes to step 306.
If the terminal reports an a2 measurement report, which indicates that the RSRP value of the serving cell currently connected to the terminal is smaller than the threshold value, it indicates that the terminal is located in a non-central position of the serving cell currently connected to the terminal, and it may need to perform inter-system handover.
Step 303: and detecting whether the data flow rate of each 160ms on the bearer with the QCI of 1 exceeds one data packet, if not, switching to a step 304, and if so, switching to a step 306.
When the data flow rate of each 160ms on the bearer does not exceed one data packet, it indicates that the terminal is in the silent period of the VOLTE voice service, and handover from LTE to the GSM system cannot be performed.
When the data flow rate of each 160ms on the bearer exceeds one data packet, the terminal is in the talk period of the VOLTE voice service, and handover from the LTE to the GSM system can be performed.
Step 304: monitoring whether the terminal reports a measurement report for switching, if so, turning to step 305, otherwise, turning to step 306.
Step 305: the terminal is not switched temporarily, and the process goes to step 302 to continue detecting the data traffic on the bearer with QCI ═ 1.
If the terminal is switched at this time, the voice call of the VOLTE is initiated at the same time when the terminal is switched from the LTE system to the GSM system, and the switching fails. Therefore, the terminal is not handed over from LTE to GSM for a while.
Step 306: the treatment is carried out according to the operations of the prior art.
If the terminal does not establish a bearer with QCI equal to 1, handover failure due to simultaneous voice call initiation of VOLTE during system handover does not occur, and therefore, the operation can be performed according to the prior art.
If the data flow of the terminal on the bearer with QCI of 1 exceeds one data packet per 160ms, it indicates that the terminal has performed VOLTE voice call, and a handover from LTE to GSM system may be performed, which may be performed according to the prior art.
In the embodiment of the invention, if the base station judges that the terminal which needs to be switched among different systems has the VOLTE data transmission bearer and does not have VOLTE voice call, the different systems are not switched for the moment, and the terminal is switched among different systems after VOLTE voice call, so that the switching failure caused by the fact that VOLTE voice call is initiated when the terminal is switched from an LTE system to a GSM system is avoided.
Based on the same technical concept, the embodiment of the invention also provides a base station, and the base station can realize the inter-system switching process of the embodiment of the invention.
Referring to fig. 4, a schematic flow chart of a base station provided in the embodiment of the present invention is shown, where the base station includes: a determining module 401 and an inter-system switching module 402, and further, the base station may further include a detecting module 403 and a monitoring module 404.
A determining module 401, configured to determine a terminal to be subjected to inter-system handover;
the inter-system switching module 402 is configured to, if the terminal establishes a bearer for voice service VOLTE data transmission on the LTE network, but does not perform VOLTE voice call through the bearer, temporarily perform inter-system switching on the terminal, and perform inter-system switching on the terminal after detecting that the terminal performs VOLTE voice call through the bearer.
Further, the base station may further include a detecting module 403, configured to detect whether the terminal performs the VOLTE voice call through the bearer by:
detecting data flow on a bearer with QCI (quaternary QCI-1), and if the flow of each first duration exceeds one data packet, carrying out VOLTE voice call by the terminal through the bearer; otherwise, the terminal does not carry out VOLTE voice call through the bearer; the first duration is the length of a data packet transmission period of a silence period of the VOLTE voice service.
The VOLTE voice service includes the following three states:
transient state: the method refers to a state that the service is not stable at the initial stage of each service establishment, and a data packet in the state is large.
And (3) a conversation period: refers to a state corresponding to a user in a call, in which one packet is transmitted every 20 ms. The packet size during the active period depends on the coding rate currently engaged.
A silent period: the method is characterized in that a data packet is sent every 160ms corresponding to the state that a user is in a call pause state, the data packet is a very short SID (Silence instruction Descriptor) frame, and the SID frame is a noise frame sent to improve the user experience.
The detection module 403 detects whether the terminal performs VOLTE voice call through the bearer with QCI ═ 1, that is, detects whether the terminal is in a call period. If the detected flow of the terminal exceeds one data packet every 160ms, it indicates that the terminal is in the call period, that is, the terminal performs VOLTE voice call through the bearer whose QCI is 1.
Optionally, the base station may further include a monitoring module 404, configured to start a monitoring thread for the terminal when detecting that the terminal establishes a bearer for the VOLTE data transmission before the base station determines the terminal to be subjected to inter-system handover; and releasing the monitoring thread of the terminal after detecting that the terminal carries out VOLTE voice call through the bearer.
Optionally, the determining module 401 may be further configured to, for a terminal with a monitoring thread being started, determine that the terminal is a terminal to be subjected to inter-system handover if a measurement report for inter-system handover sent by the terminal is received, and instruct the detecting module to detect whether the terminal is performing VOLTE voice call through the bearer.
Specifically, before the determining module 401 determines the terminal to be subjected to inter-system handover, the detecting module 403 detects that the terminal establishes a bearer for VOLTE data transmission, and the terminal reports an a2 measurement report, and then starts a monitoring thread for the terminal.
In order to reduce the processing amount of the base station, the monitoring thread described in the above embodiment may be performed only on the terminal at the cell edge, and the cell center user is not monitored. Because the reporting of the A2 measurement report by the terminal is triggered by an event, if the RSRP value of the serving cell connected with the current terminal of the terminal is smaller than the threshold value, the terminal starts the A2 measurement and reports the measurement. Therefore, the terminal reports a2 measurement report, which indicates that the terminal is not the central user of the currently connected serving cell.
Specifically, the bearer for VOLTE data transmission refers to a bearer whose quality of service level QCI is 1.
QCI is a scale value used to measure specific packet forwarding behaviors provided for SDF (Service Data Flow), such as packet loss Rate, packet delay budget, etc., and is applied to both GBR (Guaranteed Bit Rate) and Non-GBR (Non-Guaranteed Bit Rate) bearers, and is used to specify the control bearer level packet forwarding modes defined in the access node, such as scheduling weight, admission threshold, queue management threshold, link layer protocol configuration, etc., which are pre-configured by the operator to the access network node.
The bearer with QCI-1 is used for serving voice call, and the bearer with QCI-5 is used for serving to send IMS signal, which can be used for transmitting SIP signaling.
In the embodiment of the invention, if the base station judges that the terminal which needs to be switched among different systems has the VOLTE data transmission bearer and does not have VOLTE voice call, the different systems are not switched for the moment, and the terminal is switched among different systems after VOLTE voice call, so that the switching failure caused by the fact that VOLTE voice call is initiated when the terminal is switched from an LTE system to a GSM system is avoided.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A method for inter-system handover, comprising:
the base station receives a measurement report for switching between different systems sent by a terminal, and determines the terminal as the terminal to be switched between different systems;
if the terminal establishes a bearer for VOLTE data transmission of voice service on an LTE network, but the flow of each first duration does not exceed one data packet, determining that the terminal does not perform VOLTE voice call through the bearer, temporarily not performing inter-system switching on the terminal, and performing inter-system switching on the terminal after detecting that the terminal performs VOLTE voice call through the bearer; the first duration is the length of a data packet transmission period of a silence period of the VOLTE voice service.
2. The method of claim 1, wherein whether the terminal is engaged in VOLTE voice call over the bearer is detected by:
detecting data traffic on the bearer;
if the flow of each first duration exceeds one data packet, the terminal carries out VOLTE voice call through the bearer; otherwise, the terminal does not carry out VOLTE voice call through the bearer; the first duration is the length of a data packet transmission period of a silence period of the VOLTE voice service.
3. The method of claim 1, further comprising:
before the base station determines a terminal to be subjected to inter-system switching, starting a monitoring thread for the terminal when detecting that the terminal establishes a bearer for VOLTE data transmission;
releasing a monitoring thread for the terminal after detecting that the terminal carries out VOLTE voice call through the bearer;
the base station determines a terminal to be switched among different systems, and the method comprises the following steps:
and for the terminal with the started monitoring thread, if a measurement report for switching between different systems sent by the terminal is received, determining that the terminal is a terminal to be subjected to different systems, and detecting whether the terminal carries out VOLTE voice call through the bearer.
4. The method of claim 3, wherein the starting of the monitoring thread for the terminal when detecting that the terminal establishes the bearer for the VOLTE data transmission before the base station determines the terminal to be subjected to the inter-system handover comprises:
before the base station determines a terminal to be subjected to inter-system handover, if the base station detects that the terminal establishes a bearer for VOLTE data transmission and the terminal reports an A2 measurement report, a monitoring thread for the terminal is started.
5. The method according to any of claims 1 to 4, wherein the bearer for VOLTE data transmission is a bearer with a quality of service class QCI ═ 1.
6. A base station, comprising:
the system comprises a determining module, a judging module and a judging module, wherein the determining module is used for determining a terminal to be subjected to different system switching when receiving a measurement report which is sent by the terminal and is used for the different system switching;
the inter-system switching module is used for determining that the terminal does not carry out VOLTE voice call through the bearer if the terminal establishes the bearer for VOLTE data transmission of voice service on an LTE network and the flow of each first time length does not exceed one data packet, temporarily not carrying out inter-system switching on the terminal, and carrying out inter-system switching on the terminal after detecting that the terminal carries out VOLTE voice call through the bearer; the first duration is the length of a data packet transmission period of a silence period of the VOLTE voice service.
7. The base station of claim 6, further comprising:
the detection module is used for detecting whether the terminal carries out VOLTE voice call through the bearer in the following modes:
detecting data traffic on the bearer;
if the flow of each first duration exceeds one data packet, the terminal carries out VOLTE voice call through the bearer; otherwise, the terminal does not carry out VOLTE voice call through the bearer; the first duration is the length of a data packet transmission period of a silence period of the VOLTE voice service.
8. The base station of claim 6, further comprising:
the monitoring module is used for starting a monitoring thread for the terminal when the base station detects that the terminal establishes a bearer for VOLTE data transmission before determining the terminal to be subjected to inter-system switching; releasing a monitoring thread for the terminal after detecting that the terminal carries out VOLTE voice call through the bearer;
the determining module is specifically configured to, for a terminal with a monitoring thread being started, determine that the terminal is a terminal to be subjected to inter-system handover if a measurement report for inter-system handover sent by the terminal is received, and instruct the detecting module to detect whether the terminal is performing VOLTE voice call through the bearer.
9. The base station of claim 8, wherein the monitoring module is specifically configured to:
before the determining module determines the terminal to be subjected to inter-system handover, if the terminal is detected to establish a bearer for VOLTE data transmission and the terminal reports an A2 measurement report, a monitoring thread for the terminal is started.
10. The base station according to any of claims 6 to 8, wherein the bearer for VOLTE data transmission refers to a bearer with a quality of service class, QCI ═ 1.
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|---|---|---|---|---|
| CN109951878B (en) * | 2017-12-20 | 2021-07-09 | 中国移动通信集团山东有限公司 | Voice service switching method, terminal equipment, network side equipment and system |
| CN110113770A (en) * | 2018-02-01 | 2019-08-09 | 大唐移动通信设备有限公司 | A kind of method and device reducing VoLTE packet loss |
| CN111801964B (en) * | 2018-07-13 | 2021-12-31 | 华为技术有限公司 | Wireless communication method and device |
| CN111629384B (en) * | 2019-02-27 | 2021-12-03 | 大唐移动通信设备有限公司 | Call completion rate improving method and base station |
| CN111698697B (en) * | 2019-03-12 | 2022-03-29 | 大唐移动通信设备有限公司 | Voice service processing method and base station |
| CN110392393B (en) * | 2019-06-19 | 2022-12-06 | 中国移动通信集团湖北有限公司 | Service layered processing method and device for VoLTE voice service and data service |
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| CN104994542A (en) * | 2015-07-08 | 2015-10-21 | 华为技术有限公司 | Control method of inter-system detection events and user equipment |
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