CN109218043B - Service quality detection device, system and method - Google Patents
Service quality detection device, system and method Download PDFInfo
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- CN109218043B CN109218043B CN201710518724.9A CN201710518724A CN109218043B CN 109218043 B CN109218043 B CN 109218043B CN 201710518724 A CN201710518724 A CN 201710518724A CN 109218043 B CN109218043 B CN 109218043B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/50—Network service management, e.g. ensuring proper service fulfilment according to agreements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/50—Testing arrangements
- H04L43/55—Testing of service level quality, e.g. simulating service usage
Abstract
The invention discloses a service quality detection device, a system and a method, relating to the field of communication networks. The service quality detection device comprises: the message receiving and sending interface is configured to send a test message to the terminal direction of the VoWiFi service based on the wireless fidelity access and receive a response message sent by the terminal direction; a recording component configured to record the transceiving information of the sending test message and the receiving response message; and the processor is configured to determine the quality detection result according to the transmitting and receiving condition information recorded by the recording component. The embodiment of the invention can accurately determine the quality detection result of the VoWiFi service in real time according to the receiving and sending conditions of the message by sending the test message to the terminal direction of the VoWiFi service and receiving the response message, thereby realizing low cost.
Description
Technical Field
The present invention relates to the field of communication networks, and in particular, to a service quality detection apparatus, system, and method.
Background
The VoWiFi (Voice Over WiFi, Voice Over fidelity (WiFi) technology based on the S2b scheme has already matured in international standards and is applied in the current network.
In the VoWiFi service, a data stream of a user enters EPC (evolved Packet Core) from non-trusted WiFi network through internet. This segment of the network does not belong to the operator operation.
Currently, dialing tests in the VoWiFi service operation process need to periodically send out workers to different places for carrying out the dialing tests.
Disclosure of Invention
The inventor finds that the quality is difficult to control because the user's data flow from the non-trusted WiFi network across the internet into the EPC does not belong to the operator operation. Moreover, due to the characteristics of internet data transmission, paths through which data streams generated by each call of a user pass are likely to be different, so that problems occurring in the previous time cannot be reproduced, and the problem is not favorable for service troubleshooting. And a method for dispatching the staff to test regularly consumes a large amount of manpower and material resources.
In view of one or more of the above problems, embodiments of the present invention provide a method for accurately detecting VoWiFi.
According to a first aspect of the embodiments of the present invention, there is provided a service quality detection apparatus, including: the message receiving and sending interface is configured to send a test message to the terminal direction of the VoWiFi service based on the wireless fidelity access and receive a response message sent by the terminal direction; a recording component configured to record time information and/or quantity information of sending the test message and receiving the response message; and the processor is configured to determine the quality detection result according to the transmitting and receiving condition information recorded by the recording component.
In one embodiment, the quality detection means is located at an evolved packet data gateway ePDG.
In one embodiment, the test message is obtained by adding a timestamp parameter and a packet sequence number parameter to an internet key exchange protocol Information Request message IKE Information Request, and the Response message is obtained by adding a timestamp parameter and a packet sequence number parameter to an internet key exchange protocol Information Response message IKE Information Response.
In one embodiment the quality detection means is located in the network protocol multimedia subsystem IMS.
In one embodiment, the messaging interface is further configured to send a test message to the ePDG such that the ePDG sends a continuation test message to the terminal that is conducting the VoWiFi service in response to the test message and receives a feedback message for the terminal, the messaging interface is further configured to receive a response message sent by the ePDG in response to the feedback message for the terminal.
In one embodiment, the recording component includes: a timer configured to record a time interval between sending a test message and receiving a corresponding response corresponding message; and/or a counter configured to record the number of received response messages.
In one embodiment, the processor is further configured to determine the average latency and/or the packet loss rate according to the recording content of the recording component.
According to a second aspect of the embodiments of the present invention, there is provided a service quality detection system, including: any one of the foregoing service quality detection apparatuses, and a service quality detection platform, configured to send a service quality detection instruction to the service quality detection apparatus, and receive a service quality detection result sent by the service quality detection apparatus.
According to a third aspect of the embodiments of the present invention, there is provided a method for detecting quality of service, including: sending a test message to a terminal direction of a voice VoWiFi service based on wireless fidelity access; receiving a response message sent by a terminal direction; recording the receiving and sending condition information when the test message is sent and the response message is received; and determining a quality detection result according to the recorded transmitting and receiving condition information.
In one embodiment, the packet data gateway ePDG sends a test message to the terminal that is performing the VoWiFi service; the packet data gateway ePDG receives the response message sent by the terminal.
In one embodiment, the test message is obtained by adding a timestamp parameter and a packet sequence number parameter to an internet key exchange protocol Information Request message IKE Information Request, and the Response message is obtained by adding a timestamp parameter and a packet sequence number parameter to an internet key exchange protocol Information Response message IKE Information Response.
In one embodiment, the network protocol multimedia subsystem IMS sends a test message to the ePDG, so that the ePDG sends a continuation test message to the terminal performing the VoWiFi service in response to the test message and receives a feedback message of the terminal; the IMS receives the response message sent by the ePDG.
In one embodiment, the test message is an RTP test packet and the response message is an internet control message protocol ICMP message.
In one embodiment, the recording the transceiving information when the test message is transmitted and the response message is received comprises: recording the time interval between sending the test message and receiving the corresponding response message; and/or recording the number of received response messages.
In one embodiment, the average time delay and/or the packet loss rate are determined according to the recorded transceiving condition information.
According to a fourth aspect of the embodiments of the present invention, there is provided a service quality detection apparatus, including: a memory; and a processor coupled to the memory, the processor configured to perform any of the foregoing quality of service detection methods based on instructions stored in the memory.
According to a fifth aspect of the embodiments of the present invention, there is provided a computer-readable storage medium, on which a computer program is stored, wherein the program is configured to implement any one of the foregoing quality of service detection methods when executed by a processor.
One embodiment of the above invention has the following advantages or benefits: the embodiment of the invention can accurately determine the quality detection result of the VoWiFi service in real time according to the receiving and sending conditions of the message by sending the test message to the terminal direction of the VoWiFi service and receiving the response message, thereby realizing low cost.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of an application scenario of a VoWiFi service.
Fig. 2 is a block diagram of an embodiment of a quality of service detection system of the present invention.
Fig. 3 is a block diagram of an embodiment of the qos detection apparatus of the present invention.
Fig. 4 is a flowchart of an embodiment of a method for detecting quality of service according to the present invention.
Fig. 5 is a flowchart of an embodiment of a method for detecting quality of service according to the present invention.
Fig. 6 is a block diagram of an embodiment of the qos detection apparatus of the present invention.
Fig. 7 is a block diagram of another embodiment of the service quality detection apparatus of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Fig. 1 is a schematic diagram of an application scenario of a VoWiFi service. As shown in fig. 1, a terminal 11 accesses the internet 13 through an AP (Wireless Access Point) 12, and is connected to an ePDG (Evolved Packet Data Gateway) 14 of an operator through the internet 13. The ePDG14 is connected to the IMS (IP Multimedia Subsystem) 16 via a PGW (PDN GateWay, Public Data Network GateWay) 15.
The service quality detection device provided by the invention can be positioned in an ePDG to test the return trip quality of VoWiFi; alternatively, the service quality detection device may also be located in IMS to test the end-to-end quality of VoWiFi.
Fig. 2 is a block diagram of an embodiment of a quality of service detection system of the present invention. As shown in fig. 2, the service quality detection system of this embodiment includes a service quality detection apparatus 20 and a service quality detection platform 30.
The quality of service platform 30 may be configured to instruct the quality of service detection apparatus 20 to perform quality of service detection.
In an embodiment, the qos platform 30 may send parameter information such as a duration of the current test and terminal information, in addition to the indication of starting the test.
The qos platform 30 may receive the quality detection result reported by the qos detection apparatus 20 after the test is completed, so as to perform recording and statistics.
The following describes a service quality detection apparatus according to an embodiment of the present invention with reference to fig. 3.
Fig. 3 is a block diagram of an embodiment of the qos detection apparatus of the present invention. As shown in fig. 3, the quality of service detection apparatus 20 of this embodiment includes a messaging interface 201, a recording component 202, and a processor 203.
The messaging interface 201 is configured to transmit a test message to a terminal that is performing a voice over wifi service based on wifi access, and receive a response message transmitted by the terminal.
Since the previous problem in the VoWiFi service is difficult to reproduce. Therefore, the quality of the VoWiFi service is detected while the VoWiFi service is carried out, so that real-time recording can be carried out when the service quality is in problem, and troubleshooting and problem solving are facilitated.
When the qos detection apparatus is located in the ePDG, the sent test message may be obtained based on an IKEv2(Internet Key Exchange Version 2, Version 2 of the Key Exchange protocol) Information Request message, that is, based on an IKE Information Request.
The IKEv2 message is typically used to establish an IPSec (Internet Protocol Security) tunnel and stops transmission upon completion of tunnel establishment. The invention can still generate and send test messages based on IKEv2 request messages when the terminal is in VoWiFi.
According to the method and the device, a time-stamp parameter and a packet sequence number (sequence) parameter can be added in the existing IKE Information Request, and the generated new message can be an IKE Quality detection Request message, and can be represented by an IKE Information Request (Quality Test), for example. Therefore, the service quality detection device can acquire the sending time and the sending sequence number of the test message according to the content in the test request.
Accordingly, a Response message may be obtained based on the IKE Information Response, and a time-stamp (time-stamp) parameter and a packet sequence number (sequence) parameter may also be added to the message. The generated new message may be an IKE Quality detection Response message, which may be represented by IKE Information Response (Quality Test), for example. So as to facilitate statistics and recording.
By adding the parameters for statistics in the existing IKEv2 message, the quality detection can be conveniently realized by using the transmission mechanism of the existing message, and the existing message transmission architecture is not greatly changed.
When the qos detection apparatus is located in the IMS, the sent test message may be an RTP (Real-time Transport Protocol) test packet. The RTP protocol is responsible for packetizing streaming media data and implementing real-time transmission of media streams.
At this time, the IMS may not directly transmit the test message to the terminal, but to the ePDG located in the terminal direction. After receiving the RTP test packet, the ePDG may continue to send a connection test message to the terminal, for example, may also send an IKEv2 request message. After receiving the feedback from the terminal, the ePDG may return an ICMP (Internet Control Message Protocol) Message to the IMS, so that the IMS may count the test result.
When sending a test message, one or both of a timestamp and a packet sequence number may be added to the test message, for example, for logging and accounting after receiving the returned message. Of course, one skilled in the art may add other fields or identifications to the test message or not make special markings in the test message.
The recording component 202 is configured to record the transceiver information when sending the test message and receiving the response message.
The transmission/reception condition information is information related to the reception and transmission of a message other than the data content itself, and may include, for example, a transmission condition message for the transmission of a test message and a reception condition message for the reception of a response message, or information related to a combination of the reception condition and the transmission condition. The transceiving situation information may be, for example, time information and/or quantity information of transmitting a test message or receiving a response message.
In one embodiment, the recording component 202 may include a timer 2021 configured to record a time interval between sending a test message and receiving a corresponding response corresponding message.
In one embodiment, the recording component 202 may also include a counter 2022 configured to record the number of response messages received.
The processor 203 is configured to determine the quality detection result according to the transceiver information recorded by the recording component.
For example, the processor 203 may count an average of the time intervals between the sending of the sets of test messages and the receiving of the corresponding response to the respective messages as an average time delay.
For another example, the processor 203 may determine the packet loss rate according to a ratio of the number of received response messages to the number of sent test messages.
The embodiment transmits the test message to the terminal direction which carries out the VoWiFi service and receives the response message, thereby accurately determining the quality detection result of the VoWiFi service according to the receiving and sending conditions of the message in real time and realizing low cost.
The following describes a service quality detection method according to an embodiment of the present invention with reference to fig. 4.
Fig. 4 is a flowchart of an embodiment of a method for detecting quality of service according to the present invention. As shown in fig. 4, the method for detecting quality of service of this embodiment includes steps S402 to S408.
In step S402, a test message is sent to the terminal in VoWiFi service.
The test message may be sent directly to the terminal, or may be sent to other devices located in the direction of the terminal, so that the other devices continue to send other messages to the terminal after receiving the test message.
For example, when the test message is sent by the ePDG, the ePDG may send an IKEv2 Request message, i.e., an IKE Information Request message, directly to the terminal.
The invention can add a time-stamp parameter and a packet sequence number (sequence) parameter to the existing IKE Information Request to generate an IKE Information Request message, so that a service Quality detection device can acquire the sending time and the sending sequence number of the Test message according to the content in the Test Request.
Accordingly, the Response message may also add a time-stamp parameter and a packet sequence number (sequence) parameter to the IKE Information Response to generate an IKE Information Response (Quality Test) message for statistics and recording.
In step S404, a response message transmitted by the terminal is received.
In step S406, transmission/reception information at the time of transmitting the test message and receiving the response message is recorded.
In a proposed embodiment, time information and/or amount information of sending test messages and receiving response messages may be recorded.
For example, the time interval between sending a test message and receiving a corresponding response message may be recorded, or the number of response messages received may be recorded.
In step S408, the quality detection result is determined based on the recorded transmission/reception information.
For example, the average delay and packet loss rate of the test messages and corresponding response messages may be calculated.
The embodiment transmits the test message to the terminal direction which carries out the VoWiFi service and receives the response message, thereby accurately determining the quality detection result of the VoWiFi service according to the receiving and sending conditions of the message in real time and realizing low cost.
The method of the above embodiment may be performed by an ePDG. At this time, the ePDG may directly send a test message to the terminal, so that the VoWiFi backhaul quality test may be implemented.
In addition, the method of the embodiment may also be completed by IMS initiative, and the ePDG performs transfer and connection of messages to implement a VoWiFi end-to-end test. A method for detecting the quality of service according to another embodiment of the present invention is described below with reference to fig. 5.
Fig. 5 is a flowchart of an embodiment of a method for detecting quality of service according to the present invention. As shown in fig. 5, the method for detecting quality of service of this embodiment includes steps S502 to S512.
In step S502, the IMS sends a test message to the ePDG located between the IMS and the terminal that is performing the VoWiFi service.
In step S504, the ePDG sends a connection test message to the terminal that is performing the VoWiFi service.
In step S506, the ePDG receives the feedback message of the terminal.
In step S508, the ePDG sends a response message to the test message to the IMS.
In step S510, the IMS records transmission/reception information when the test message is transmitted and the response message is received.
In step S512, the IMS determines a quality detection result from the recorded transmission/reception information.
The embodiment can accurately determine the quality detection result of the VoWiFi service in real time according to the receiving and sending conditions of the message, and realize the end-to-end VoWiFi test.
Fig. 6 is a block diagram of an embodiment of the qos detection apparatus of the present invention. As shown in fig. 6, the apparatus 600 of this embodiment includes: a memory 610 and a processor 620 coupled to the memory 610, the processor 620 being configured to execute the quality of service detection method in any of the foregoing embodiments based on instructions stored in the memory 610.
Fig. 7 is a block diagram of another embodiment of the service quality detection apparatus of the present invention. As shown in fig. 7, the apparatus 600 of this embodiment includes: the memory 610 and the processor 620 may further include an input/output interface 730, a network interface 740, a storage interface 750, and the like. These interfaces 730, 740, 750, as well as the memory 610 and the processor 620, may be connected, for example, by a bus 760. The input/output interface 730 provides a connection interface for input/output devices such as a display, a mouse, a keyboard, and a touch screen. The network interface 740 provides a connection interface for various networking devices. The storage interface 750 provides a connection interface for external storage devices such as an SD card and a usb disk.
An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, wherein the computer program is configured to implement any one of the foregoing quality of service detection methods when executed by a processor.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
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.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (14)
1. An apparatus for quality of service detection, comprising:
the system comprises a messaging interface, a voice over fidelity (VoWiFi) interface and a voice over fidelity (VoWiFi) interface, wherein the messaging interface is configured to send a test message to a terminal direction of the VoWiFi service based on wireless fidelity access and receive a response message sent by the terminal direction;
a recording component configured to record the transceiving condition information when the test message is transmitted and the response message is received;
a processor configured to determine a quality detection result according to the transceiving condition information recorded by the recording component;
wherein the quality detection apparatus is located in an evolved packet data gateway ePDG.
2. The quality detection apparatus according to claim 1, wherein the test message is obtained by adding a timestamp parameter and a packet sequence number parameter to an internet key exchange protocol Information Request message IKE Information Request, and the Response message is obtained by adding a timestamp parameter and a packet sequence number parameter to an internet key exchange protocol Information Response message IKE Information Response.
3. An apparatus for quality of service detection, comprising:
the message receiving and sending interface is configured to send a test message to the terminal direction of the VoWiFi service based on the wireless fidelity access and receive a response message;
a recording component configured to record the transceiving condition information when the test message is transmitted and the response message is received;
a processor configured to determine a quality detection result according to the transceiving condition information recorded by the recording component;
wherein, the quality detection device is positioned in a network protocol multimedia subsystem IMS;
the messaging interface is further configured to send the test message to the ePDG so that the ePDG sends a continuation test message to the terminal that is performing the VoWiFi service in response to the test message and receives a feedback message of the terminal, and the messaging interface is further configured to receive the response message sent by the ePDG in response to the feedback message of the terminal.
4. A quality detection apparatus as claimed in any one of claims 1 to 3 wherein the recording assembly comprises:
a timer configured to record a time interval between sending the test message and receiving a corresponding response message; and/or the presence of a gas in the gas,
a counter configured to record a number of received response messages.
5. The quality detection apparatus according to any one of claims 1-3, wherein the processor is further configured to determine an average delay and/or a packet loss rate according to a recording content of the recording component.
6. A quality of service detection system, comprising:
the quality of service detection apparatus as claimed in any of claims 1-5, and
and the service quality detection platform is configured to send a service quality detection instruction to the service quality detection device and receive a service quality detection result sent by the service quality detection device.
7. A method for quality of service detection, comprising:
sending a test message to a terminal direction of a voice VoWiFi service based on wireless fidelity access;
receiving a response message sent by the terminal direction;
recording the receiving and sending condition information when the test message is sent and the response message is received;
determining a quality detection result according to the recorded receiving and sending condition information;
the method comprises the steps that a packet data gateway ePDG sends a test message to a terminal which is carrying out VoWiFi service; and the packet data gateway ePDG receives the response message sent by the terminal.
8. The method as claimed in claim 7, wherein the test message is obtained by adding a timestamp parameter and a packet sequence number parameter to an internet key exchange protocol Information Request message IKE Information Request, and the Response message is obtained by adding a timestamp parameter and a packet sequence number parameter to an internet key exchange protocol Information Response message IKE Information Response.
9. A method for quality of service detection, comprising:
sending a test message to a terminal direction of a voice VoWiFi service based on wireless fidelity access;
receiving a response message;
recording the receiving and sending condition information when the test message is sent and the response message is received;
determining a quality detection result according to the recorded receiving and sending condition information;
the IMS sends the test message to the ePDG so that the ePDG responds to the test message to send a continuing test message to a terminal which is carrying out VoWiFi service and receive a feedback message of the terminal;
and the IMS receives the response message sent by the ePDG in response to the feedback message of the terminal.
10. The method of claim 9, wherein the test message is an RTP test packet and the response message is an internet control message protocol ICMP message.
11. The method according to any one of claims 7-10, wherein the recording the transceiving information when the test message is transmitted and the response message is received comprises:
recording a time interval between sending the test message and receiving a corresponding response message; and/or the presence of a gas in the gas,
the number of response messages received is recorded.
12. The method according to any one of claims 7-10, wherein the average delay and/or the packet loss rate is determined according to the recorded transceiving information.
13. An apparatus for quality of service detection, comprising:
a memory; and
a processor coupled to the memory, the processor configured to perform the quality of service detection method of any of claims 7-12 based on instructions stored in the memory.
14. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the quality of service detection method according to any one of claims 7 to 12.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101523809A (en) * | 2006-09-28 | 2009-09-02 | 高通股份有限公司 | Methods and apparatus for determining communication link quality |
| WO2016068781A1 (en) * | 2014-10-30 | 2016-05-06 | Icomera Ab | Wireless communication system for trains using voice over wifi (vowifi) |
| CN106034125A (en) * | 2015-03-17 | 2016-10-19 | 中国移动通信集团公司 | IP voice communication falling back method, apparatus, system and terminal equipment thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101523809A (en) * | 2006-09-28 | 2009-09-02 | 高通股份有限公司 | Methods and apparatus for determining communication link quality |
| WO2016068781A1 (en) * | 2014-10-30 | 2016-05-06 | Icomera Ab | Wireless communication system for trains using voice over wifi (vowifi) |
| CN106034125A (en) * | 2015-03-17 | 2016-10-19 | 中国移动通信集团公司 | IP voice communication falling back method, apparatus, system and terminal equipment thereof |
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