CN102487341A - Session detection method and apparatus thereof, and session initiation protocol (SIP) server - Google Patents
Session detection method and apparatus thereof, and session initiation protocol (SIP) server Download PDFInfo
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- CN102487341A CN102487341A CN201010571295XA CN201010571295A CN102487341A CN 102487341 A CN102487341 A CN 102487341A CN 201010571295X A CN201010571295X A CN 201010571295XA CN 201010571295 A CN201010571295 A CN 201010571295A CN 102487341 A CN102487341 A CN 102487341A
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- sip server
- session
- message
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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
- H04L41/5041—Network service management, e.g. ensuring proper service fulfilment according to agreements characterised by the time relationship between creation and deployment of a service
- H04L41/5054—Automatic deployment of services triggered by the service manager, e.g. service implementation by automatic configuration of network components
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/1066—Session management
- H04L65/1101—Session protocols
- H04L65/1104—Session initiation protocol [SIP]
Abstract
The invention discloses a session detection method and an apparatus thereof, and a session initiation protocol (SIP) server. The method comprises the following steps that: the SIP server determines whether user state detection is needed to be initiated after receiving a message which is used to request to establish a service; under a condition of needing to initiate the user state detection, the SIP server detects a first session of a message sender and acquires a detection result, wherein the first session is existed on the SIP server before; the SIP server determines whether to establish the service according to the detection result. By using the method, the apparatus and the server of the invention, user experience can be improved.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of talk detection method, device and session initial protocol server.
Background technology
Conversation initialized protocol (Session Initiation Protocol; Abbreviate SIP as) rely on that it is simple, be easy to expansion, be convenient to plurality of advantages such as realization and progressively become next generation network (Next Generation Network; Abbreviate NGN as) and IP multimedia system (IP Multimedia Subsystem abbreviates IMS as) in popular protocol.
Generally, the session in sip server all can engage in the dialogue to sip terminal and other connection devices detects, and resource (for example, User Status, data field etc.) is carried out real-time detection and control.But; When unusual or terminal equipment causes information drop-out unusually when network; The resource information that sip server is preserved is inconsistent with actual information state, and when the user initiated newly to call out once more, sip server can be done the processing that makes mistake according to the user profile that is kept in the database to request.Be illustrated in the face of this down.
Fig. 1 sip server end and terminal (perhaps miscellaneous equipment occurs according to prior art; Below for convenience; Below terminal or other equipment are referred to as the terminal) flow chart that the inconsistent situation of User Status produces, as shown in Figure 1, this flow process comprises the steps:
Step S101, acting server (Proxy Server) receive terminal request and set up the INVITE of calling out, and this INVITE does not have TO TAG, belong to the outer message of dialogue;
Step S102, Proxy Server transmits INVITE and asks opposite side;
Step S103 after the terminal receives INVITE (dialog1) message, agrees to set up session, sends the 200OK response;
Step S104, Proxy Server transmits 200OK and responds opposite side;
Step S105, the terminal is represented to confirm for 200OK, sends ACK, realizes that 3 sides shake hands;
Step S106, Proxy Server transmit ACK to opposite side;
Step S107, BYE message is sent to Proxy Server in the terminal, requires to discharge resource, but because network is unusual or other reasons, this information drop-out causes the resource information on Proxy Server and the terminal inconsistent;
Step S108, terminal be initiation session once more, sends INVITE (dialog2) to Proxy Server;
Step S109, Proxy Server checks User Status, finds that the user converses, if the user does not have signing service, then replys 486, the business such as divert when busy if the user has contracted are then done business operation.
Step S110, the terminal is replied ACK and is replied.
In agreement RFC4028,, be explained below in order to address the above problem the method that has proposed a kind of cycle detection User Status.
When server during as user agent (User Agent abbreviates UA as), if exist 4028 to detect, that need wait for that Session Timer (session timer) is overtime, just can detect resource; If there is not this detection, need restarts terminal or other ways so and could discharge resource; If server is as agency (PROXY), when opening 4028 when detecting, when sessiontimer then, PROXY just can discharge the resource that oneself takies, but can not send BYE message, if open, then can take always.Although proposed the scheme of above-mentioned cycle detection User Status at RFC4028,, for legacy network, normally do not support 4028 to detect, in addition, even support 4028 to detect and also need a period of time could discharge resource.
Therefore, in the prior art, (for example, call business) still might cause this service fail when the user initiates business.Thereby reduced user experience.
Summary of the invention
Main purpose of the present invention is to provide a kind of talk detection method, device and sip server, to address the above problem at least.
According to an aspect of the present invention, a kind of talk detection method is provided, has comprised: the session initiation protocol sip server receive be used to ask set up professional message after, determine whether that needing to initiate User Status detects; Said sip server is initiated at needs under the situation of User Status detection, and first session that on said sip server, exists before the transmit leg to said message is initiated to detect, and obtains testing result; Said sip server determines whether to set up said business according to said testing result.
Preferably; Said sip server initiates to detect to said first session; And the acquisition testing result comprises: said sip server indicates said transmit leg that said first session is detected to the message that said transmit leg sends the identification information that carries said first session; Said transmit leg detects and said testing result is sent to said sip server; Said sip server obtains said testing result.
Preferably; Said sip server is used to ask to set up under the message scenario of call business receiving; Said sip server determines whether that needing to initiate the User Status detection comprises: said sip server inquiry local resource; Transmit leg confirming said message is under the situation of another session, initiates User Status and detects.
Preferably, said sip server initiates to detect to said first session, and the acquisition testing result comprises: said sip server sends the message of the identification information that carries said first session to said transmit leg; Whether said transmit leg detects said first session and exists, and said testing result is sent to said sip server; Said sip server obtains said testing result.
Preferably; Said sip server determines whether to set up said business according to said testing result and comprises: said sip server is under the non-existent situation of said first session; Upgrade its local resource information state, discharge and the corresponding resource of said first session, and set up said call business; Said sip server is used to indicate just busy message to said transmit leg transmission under the situation that said first session exists.
Preferably, said sip server receive be used to set up the message of call business after, also comprise: said sip server sends to said transmit leg and is used for indicating said sip server attempting setting up the message of said call business to said transmit leg.
According to a further aspect in the invention, a kind of session checkout gear is provided also, has comprised: first determination module, be used for receive be used to ask set up professional message after, determine whether that needing to initiate User Status detects; Detect initiation module, be used for initiating under the situation of User Status detection at needs, first session that on said sip server, exists before the transmit leg to said message is initiated to detect, and obtains testing result; Second determination module is used for determining whether to set up said business according to said testing result.
Preferably, said detection initiation module comprises: sending module, be used for sending the message of the identification information that carries said first session to said transmit leg, and indicate said transmit leg that said first session is detected; Receiver module is used to receive the said testing result that said transmit leg sends after detecting.
Preferably, receive at said sip server under the situation of the message that is used to set up call business, said detection initiation module is used to inquire about local resource, is under the situation of another session at the transmit leg of confirming said message, initiates User Status and detects.
According to a further aspect of the invention, a kind of sip server is provided also, has comprised above-mentioned session checkout gear.
Through the present invention, adopted the session initiation protocol sip server receive be used to ask to set up professional message after, determine whether that needing to initiate User Status detects; Said sip server is initiated at needs under the situation of User Status detection, and first session that on said sip server, exists before the transmit leg to said message is initiated to detect, and obtains testing result; Said sip server determines whether to set up said business according to said testing result.Solved that the user initiates the problem that business might cause service fail in the prior art, and then improved user experience.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart that occurs sip server end and the inconsistent situation generation of terminal use's state according to prior art;
Fig. 2 is the flow chart according to the talk detection method of the embodiment of the invention;
Fig. 3 is the structured flowchart according to the session checkout gear of the embodiment of the invention;
Fig. 4 is the structured flowchart that preferably detects initiation module according to the embodiment of the invention;
Fig. 5 is that the detection user based on SIP according to the embodiment of the invention finds to call out the process chart when having discharged;
Fig. 6 is that the detection user based on SIP according to the embodiment of the invention finds the also process chart when taking of call resources.
Embodiment
Hereinafter will and combine embodiment to specify the present invention with reference to accompanying drawing.Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.
Fig. 2 is the flow chart according to the talk detection method of the embodiment of the invention, and is as shown in Figure 2, and this flow process comprises the steps:
Step S202, sip server receive be used to ask set up professional message after, determine whether that needing to initiate User Status detects.
Step S204, sip server initiate at needs under the situation of User Status detection, and first session that on this sip server, exists before the transmit leg to this message is initiated to detect, and obtain testing result; Need to prove that at this " first session " here is for convenience and to the title that this session rose, the implication that " first " wherein is unactual.
Step S206, sip server determines whether to set up professional according to this testing result.
Pass through above-mentioned steps; The resource rapid release mode of under the abnormal conditions of network (for example, after dialog set up, sip server was because certain causes information inconsistency between terminal and the server unusually) has been proposed; Sip server is after receiving message; Can initiate detection, certain progress arranged, can improve user experience than the mode of cycle detection of the prior art to User Status.
For example, the request that can utilize follow-up new initiation is as a trigger condition, if by this request trigger 486 result; Then sip server initiates to detect for the session of preexist, detects successfully, then refuses new calling; Detect failure, then discharge resource again, calling is continued.
Sip server has a variety of to the detection mode of the session of preexist; A kind of preferred detection mode is provided in the present embodiment; What in this mode, carry out detection is the transmit leg of this message; Be explained below: the message that sip server sends the identification information that carries first session to the transmit leg of above-mentioned message, wherein, this message is used to indicate transmit leg that first session is detected; Transmit leg detects after receiving this message and testing result is sent to sip server; Thereby make sip server obtain testing result.
Be that example describes with the message (or being called request message) of setting up call business below: sip server receives the message that is used to set up call business; Sip server inquiry local resource is under the situation of another session at the transmit leg of confirming this message, initiates User Status and detects.At this moment, preferably, sip server can send the message of the identification information that carries first session to transmit leg; Whether the transmit leg detection exists in local first session, and sends to sip server to testing result; Sip server obtains testing result.
Preferably, sip server can upgrade its local resource information state under the non-existent situation of first session, discharge the resource corresponding with first session, and set up call business; Sip server is used to indicate just busy message to the transmit leg transmission under the situation that first session exists.
Preferably; Sip server receive be used to set up the message of call business after; Sip server can send to transmit leg and be used for indicating this sip server attempting setting up the message of call business to transmit leg, repeats to send the message that is used to set up call business to avoid sending.
In the present embodiment, a kind of session checkout gear is provided also, this device is used to realize above-mentioned talk detection method, has carried out repeating no more at this of explanation, and the module that relates in the face of this device down describes.Fig. 3 is the structured flowchart according to the session checkout gear of the embodiment of the invention, and is as shown in Figure 3, and this device comprises: first determination module 32, detect initiation module 34, second determination module 36, describe in the face of this structure down.
First determination module 32, be used for receive be used to ask set up professional message after, determine whether that needing to initiate User Status detects; Detect initiation module 34 and be connected to first determination module 32, be used for initiating under the situation of User Status detection at needs, first session that on sip server, exists before the transmit leg to message is initiated to detect, and obtains testing result; Second determination module 36 is connected to and detects initiation module 34, is used for determining whether to set up professional according to testing result.
Fig. 4 is the structured flowchart that preferably detects initiation module according to the embodiment of the invention, and is as shown in Figure 4, and detect initiation module 34 and comprise: sending module 342 and receiver module 344 are explained below.
Sending module 342 is used for sending to transmit leg the message of the identification information carry first session, and wherein, message is used to indicate transmit leg that first session is detected; Receiver module 344 is used to receive the testing result that transmit leg sends after detecting.
Preferably, receive at sip server under the situation of the message that is used to set up call business, detect initiation module 34, be used to inquire about local resource, be under the situation of another session, initiate User Status and detect at the transmit leg of confirming message.
Certainly, said apparatus can be arranged in acting server, can certainly be arranged in other sip server.Below be that example describes to be arranged in acting server.
Fig. 5 is that the detection user based on SIP according to the embodiment of the invention finds to call out the process chart when having discharged; This Figure illustrates sip server and terminal for User Status when inconsistent; The sip server end is initiatively initiated the state-detection incident, judges resource status through the transmission and the subsequent response of request in talking with, and discharges original state and/or resource information; Connect the flow process of new conversation resource, this flow process also goes for application server or soft switch field.As shown in Figure 5, this flow process comprises the steps:
Step S501, Proxy Server receive terminal request and set up the INVITE of calling out, and this INVITE does not have TO TAG, belong to the outer message of dialogue;
Step S502, Proxy Server replys 100Trying, to avoid the repeating transmission of INVITE;
Step S503, Proxy Server does inquiry to resource and detects, when finding that the user is in the other dialogue (DIALOG); Proxy Server initiatively initiates User Status and detects, here for versatility and compatibility, and the preferred INVITE (Re-INVITE) that uses in the dialogue; The DIALOG ID and the DIALOG ID among the step S501 of this Re-INVITE message are inconsistent, should be the ID of the present other dialogue of user, need to prove; Employed message is Re-INVITE in this step; This is a kind of illustrating, and message also can be used for detecting session in other the dialogue, enumerates no longer one by one at this;
Step S504, corresponding answer is done according to the dialog information in the database after receiving INVITE (dialog1) message in the terminal, if dialogue has not existed, then replys 481 responses;
Step S505, Proxy Server confirms 481 expressions, replys the ACK confirmation;
Step S506, because 481 responses have been replied at the terminal, the expression dialogue does not exist, and the user is in Idle state, and Proxy Server need revise the resource information state and discharge resource;
Step S507, Proxy Server continue according to the terminal wish, set up and call out, and send INVITE to next jumping.
There is the step of the foregoing description to find out; Initiatively initiated the User Status detection at Proxy Server to the terminal; Thereby checked this user resources state; Under the situation that the resource of before having talked with at the terminal has discharged, Proxy Server discharges the resource to previous dialogue, and to connecting the new session of initiating of user.It is to be noted 481 responses that reply at the terminal in the step 204, this response is illustrated in the terminal in this is checked previous dialogue does not exist.
Fig. 6 is that the detection user based on SIP according to the embodiment of the invention finds the also process chart when taking of call resources; This Figure illustrates the sip server end and initiate the state-detection incident; Through the transmission of request in talking with, and subsequent response judgement resource status is consistent, thereby refuses the flow process of new call request; As shown in Figure 6, this flow process comprises the steps:
Step S601, Proxy Server receive terminal request and set up the INVITE of calling out, and this INVITE does not have TO TAG, belong to the outer message of dialogue;
Step S602, Proxy Server replys 100Trying, avoids the repeating transmission of INVITE;
Step S603, Proxy Server does inquiry to resource and detects, when finding that the user is in the dialogue; Proxy Server need initiatively initiate User Status and detect; The DIALOG ID and the DIALOGID among the step S601 of this Re-INVITE message are inconsistent, should be the ID of the residing dialogue of user, need to prove; Employed message is Re-INVITE in this step; This is a kind of illustrating, and message also can be used for detecting session in other the dialogue, enumerates no longer one by one at this;
Step S604, corresponding answer is done according to the dialog information in the database after receiving INVITE (dialog1) message in the terminal, if dialogue exists, replys 200 responses;
Step S605, Proxy Server confirms 200 expressions, replys the ACK confirmation;
Step S606, because 200 responses have been replied at the terminal, the expression dialogue exists; The user is in busy condition, and Proxy Server need keep resource information and state, replys 486 for setting up the new session request INVITE of calling out; Need to prove at this, 486 just illustrating here, but be not limited to this; Certainly, also can trigger business (for example, divert when busy etc.);
Step S607, the ACK confirmation is replied at the terminal.
Have the foregoing description to find out, under the situation of the state resource consistence at Proxy Server and terminal, Proxy Server continues keeping the resource in this server through detecting.
In sum, through the above embodiment of the present invention, solved in the prior art sense cycle not then, the user initiates the problem that business might cause service fail, and then has improved user experience.
Obviously; It is apparent to those skilled in the art that above-mentioned each module of the present invention or each step can realize that they can concentrate on the single calculation element with the general calculation device; Perhaps be distributed on the network that a plurality of calculation element forms; Alternatively, they can be realized with the executable program code of calculation element, carried out by calculation element thereby can they be stored in the storage device; Perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a talk detection method is characterized in that, comprising:
The session initiation protocol sip server receive be used to ask set up professional message after, determine whether that needing to initiate User Status detects;
Said sip server is initiated at needs under the situation of User Status detection, and first session that on said sip server, exists before the transmit leg to said message is initiated to detect, and obtains testing result;
Said sip server determines whether to set up said business according to said testing result.
2. method according to claim 1 is characterized in that, said sip server initiates to detect to said first session, and the acquisition testing result comprises:
Said sip server indicates said transmit leg that said first session is detected to the message that said transmit leg sends the identification information that carries said first session;
Said transmit leg detects and said testing result is sent to said sip server;
Said sip server obtains said testing result.
3. method according to claim 1 and 2 is characterized in that, said sip server is used to ask to set up under the message scenario of call business receiving, and said sip server determines whether to need to initiate User Status and detects and comprise:
Said sip server inquiry local resource is under the situation of another session at the transmit leg of confirming said message, initiates User Status and detects.
4. method according to claim 3 is characterized in that, said sip server initiates to detect to said first session, and the acquisition testing result comprises:
Said sip server sends the message of the identification information that carries said first session to said transmit leg;
Whether said transmit leg detects said first session and exists, and said testing result is sent to said sip server;
Said sip server obtains said testing result.
5. method according to claim 4 is characterized in that, said sip server determines whether to set up said business according to said testing result and comprises:
Said sip server upgrades its local resource information state under the non-existent situation of said first session, discharge and the corresponding resource of said first session, and set up said call business;
Said sip server is used to indicate just busy message to said transmit leg transmission under the situation that said first session exists.
6. method according to claim 3 is characterized in that, said sip server receive be used to set up the message of call business after, also comprise:
Said sip server sends to said transmit leg and is used for indicating said sip server attempting setting up the message of said call business to said transmit leg.
7. a session checkout gear is characterized in that, comprising:
First determination module, be used for receive be used to ask set up professional message after, determine whether that needing to initiate User Status detects;
Detect initiation module, be used for initiating under the situation of User Status detection at needs, first session that on said sip server, exists before the transmit leg to said message is initiated to detect, and obtains testing result;
Second determination module is used for determining whether to set up said business according to said testing result.
8. device according to claim 7 is characterized in that, said detection initiation module comprises:
Sending module is used for sending to said transmit leg the message of the identification information that carries said first session, indicates said transmit leg that said first session is detected;
Receiver module is used to receive the said testing result that said transmit leg sends after detecting.
9. according to claim 7 or 8 described devices, it is characterized in that,
Receive at said sip server under the situation of the message that is used to set up call business, said detection initiation module is used to inquire about local resource, is under the situation of another session at the transmit leg of confirming said message, initiates User Status and detects.
10. a sip server is characterized in that, comprises claim 7 or 8 described session checkout gears.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010571295.XA CN102487341B (en) | 2010-12-02 | 2010-12-02 | Talk detection method, device and session initial protocol server |
| PCT/CN2011/075940 WO2012071882A1 (en) | 2010-12-02 | 2011-06-20 | Session detection method, device and session initiation protocol server |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010571295.XA CN102487341B (en) | 2010-12-02 | 2010-12-02 | Talk detection method, device and session initial protocol server |
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| CN102487341A true CN102487341A (en) | 2012-06-06 |
| CN102487341B CN102487341B (en) | 2015-10-21 |
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| CN201010571295.XA Active CN102487341B (en) | 2010-12-02 | 2010-12-02 | Talk detection method, device and session initial protocol server |
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| CN (1) | CN102487341B (en) |
| WO (1) | WO2012071882A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104954373A (en) * | 2015-06-12 | 2015-09-30 | 广东天波信息技术股份有限公司 | Unified communication active SIP (Session Initiation Protocol) calling method and system |
| CN111327562A (en) * | 2018-12-13 | 2020-06-23 | 海能达通信股份有限公司 | Session detection method, session system and storage medium |
| CN114679435A (en) * | 2022-05-27 | 2022-06-28 | 武汉中科通达高新技术股份有限公司 | Session management system, method, computer device and storage medium |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103179688B (en) * | 2013-03-22 | 2015-11-18 | 北京久华信信息技术有限公司 | The method of wireless communication system resource release is realized based on Session Initiation Protocol |
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| US20060159245A1 (en) * | 2005-01-19 | 2006-07-20 | Yong-Shin Kim | Testing user terminal status |
| CN1822599A (en) * | 2005-02-16 | 2006-08-23 | 中兴通讯股份有限公司 | Detecting method of terminal online state of meeting sponsered protocol server |
| CN1859361A (en) * | 2005-05-08 | 2006-11-08 | 中兴通讯股份有限公司 | Method for detecting terminal on-line state of meeting sponsored protocol server |
| CN101309277A (en) * | 2008-06-19 | 2008-11-19 | 华为技术有限公司 | SIP terminal, method and system for uploading state, method and apparatus for processing the uploaded state |
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2010
- 2010-12-02 CN CN201010571295.XA patent/CN102487341B/en active Active
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2011
- 2011-06-20 WO PCT/CN2011/075940 patent/WO2012071882A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060159245A1 (en) * | 2005-01-19 | 2006-07-20 | Yong-Shin Kim | Testing user terminal status |
| CN1822599A (en) * | 2005-02-16 | 2006-08-23 | 中兴通讯股份有限公司 | Detecting method of terminal online state of meeting sponsered protocol server |
| CN1859361A (en) * | 2005-05-08 | 2006-11-08 | 中兴通讯股份有限公司 | Method for detecting terminal on-line state of meeting sponsored protocol server |
| CN101309277A (en) * | 2008-06-19 | 2008-11-19 | 华为技术有限公司 | SIP terminal, method and system for uploading state, method and apparatus for processing the uploaded state |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104954373A (en) * | 2015-06-12 | 2015-09-30 | 广东天波信息技术股份有限公司 | Unified communication active SIP (Session Initiation Protocol) calling method and system |
| CN104954373B (en) * | 2015-06-12 | 2019-01-18 | 广东天波信息技术股份有限公司 | Unified Communication active SIP method of calling and system |
| CN111327562A (en) * | 2018-12-13 | 2020-06-23 | 海能达通信股份有限公司 | Session detection method, session system and storage medium |
| CN114679435A (en) * | 2022-05-27 | 2022-06-28 | 武汉中科通达高新技术股份有限公司 | Session management system, method, computer device and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012071882A1 (en) | 2012-06-07 |
| CN102487341B (en) | 2015-10-21 |
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