CN100502583C - Method, switch center and communication system for detecting circuit state of media gateway - Google Patents
Method, switch center and communication system for detecting circuit state of media gateway Download PDFInfo
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- CN100502583C CN100502583C CN 200710001123 CN200710001123A CN100502583C CN 100502583 C CN100502583 C CN 100502583C CN 200710001123 CN200710001123 CN 200710001123 CN 200710001123 A CN200710001123 A CN 200710001123A CN 100502583 C CN100502583 C CN 100502583C
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/40—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass for recovering from a failure of a protocol instance or entity, e.g. service redundancy protocols, protocol state redundancy or protocol service redirection
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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
- H04L65/10—Architectures or entities
- H04L65/102—Gateways
- H04L65/1023—Media gateways
- H04L65/103—Media gateways in the network
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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
- H04L65/10—Architectures or entities
- H04L65/102—Gateways
- H04L65/1043—Gateway controllers, e.g. media gateway control protocol [MGCP] controllers
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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
- H04L65/80—Responding to QoS
Abstract
The invention provides one method to test media network circuit status, exchange center and communication system, which comprises the following steps: in test call number designing current test circuit and exchange center receives the call and according to call number through test circuit media network gate and if the test calls succeeds, then test circuit status is normal; if the test call fails then test circuit status is not normal. The invention provides one exchange center comprises receive module, selection module and circuit status judgment module.
Description
Technical field
The present invention relates to the communications field, particularly a kind of method, switching center and communication system that detects circuit state between media gateway.
Background technology
In mobile communication system, whole network system can be divided into network subsystem, base station sub-system, travelling carriage and Operation ﹠ Maintenance System.Network subsystem mainly comprises MSC (Mobile Switching Center, mobile switching centre), VLR (VisitorLocation Register, VLR Visitor Location Register), HLR (Home Location Register, attaching position register), AC (Authentication Center, AUC) and EIR (Equipment Identification Register, mobile device identification register).Under the soft-exchange construction, MSC can be divided into two kinds of network entities: MSC Server (Mobile Switching CenterServer, Mobile Switching Center Server) and MGW (Meida Gateway, media gateway).MSC Server can by bearer control protocol H.248 (H.248/MECAMGO Protocol)/MGCP (Media Gateway ControlProtocol, MGCP) control one or more MGW.MSC Server mainly is responsible for calling out control and mobile management.MGW is responsible for circuit and IP bag data exchanging function, be the gateway of the Media Stream under circuit carrying under the circuit switching and IP exchange, can realize between circuit-switched network and the IP switching network intercommunication and the exchange of (perhaps with a kind of switching network inside) speech, data, video.
Usually MSC Server can control a plurality of MGW, connection between two adjacent MGW is called path, path connects by the E1 line physically, it is a kind of TDM (Time Division Multiplexing that the E1 line connects, time division multiplexing) connected mode, 32 circuit (i.e. 32 time slots) are arranged on the every E1 line, and every circuit all has label, i.e. a circuit number.Article one, can there be many E1 lines to connect on the path.In order to verify the quality of the whether correct and physical circuit of annexation between the MGW, need take the relevant detection means that circuit state is detected.Referring to Fig. 1 and Fig. 2, judge circuit state between gateway by whether can newly connecting a calling in the prior art.MSC2 links to each other with MSC3 with MSC1 respectively among Fig. 1, is connected with BSC1 (BaseStation Controller, base station controller) below the MSC1, is connected with BSC2 below the MSC3.Fig. 2 comprises five gateway: MGW1, MGW2, MGW3, MGW4 and MGW5 for the gateway annexation schematic diagram under the MSC2 office.User under the customer call BSC2 under the existing BSC1 then needs inter-network to close and calls out.For MSC2, select MGW1 when supposing Incoming, select MGW5 when out, then MSC2 can select inter-network to close less path earlier when selecting the gateway path.Attempt at first whether direct path is arranged between MGW1 and the MGW5, if directly do not connect, then this is selected and can fail.Can in underpass, attempt then:
MGW1，MGW2，MGW5；
MGW1，MGW3，MGW5；
MGW1，MGW4，MGW5。
If wherein have on the path idle circuit is arranged, then just call out and connect.If these three paths all do not have idle circuit, then attempt striding the path of 4 gateways:
MGW1，MGW2，MGW3，MGW5；
MGW1, MGW3, MGW2, MGW5 or the like.
As long as between MGW1 and MGW5, there is a path to have idle circuit, then calls out and just can connect.If have fault on certain bar circuit, can skip the circuit that has fault automatically during selection.Therefore can determine that the circuit of calling process all is good during call through.
The shortcoming of above-mentioned prior art is:
Close calling for inter-network, connect under the obstructed situation,, can't predict to have selected any bar circuit in the reality for use, therefore can not determine which bar circuit is fault occur on earth, is not easy to malfunction elimination because the gateway path has multiple choices in calling.
Summary of the invention
Can not determine the problem of faulty circuit when detecting circuit state between gateway in order to solve in the prior art, the embodiment of the invention provides a kind of method that detects circuit state between media gateway, specifically comprises:
Specify circuit when Pretesting, in the call number of test call, carry described E1 line label and circuit number of working as the circuit of Pretesting, after switching center receives described test call, select the described media gateway of working as the circuit of Pretesting of process according to described call number, if described test call success, then the state of described current test circuit is normal, if the failure of described test call, then the state of described current test circuit is undesired.
The embodiment of the invention also provides a kind of switching center, and described switching center comprises:
Receiver module is used for acceptance test and calls out, and has carried the E1 line label and the circuit number of current test circuit in the call number of described test call;
Select module, be used for after described receiver module receives described test call, select the media gateway of the described circuit of process to set up test call according to described call number;
The circuit state determination module is used for when described test call is successful, and the state of judging current test circuit is for normal, and when described test call was failed, the state of judging current test circuit was undesired.
The embodiment of the invention also provides a kind of communication system, and described communication system comprises switching center and media gateway,
Described switching center comprises:
Receiver module is used for acceptance test and calls out, and has carried the E1 line label and the circuit number of current test circuit in the call number of described test call;
Select module, be used for after described receiver module receives described test call, from described media gateway, select the media gateway of the described circuit of process to set up test call according to described call number;
The circuit state determination module is used for when described test call is successful, and the state of judging current test circuit is for normal, and when described test call was failed, the state of judging current test circuit was undesired.
The beneficial effect of the embodiment of the invention mainly shows:
Gateway by specified circuit and this circuit of selection process carries out call testing, can detect the state of circuit between media gateway, and can carry out under the situation of non-interrupting service, for complicated TDM networking provides a kind of means of test maintaining flexibly.
Description of drawings
Fig. 1 is a MSC annexation schematic diagram in the prior art;
Fig. 2 is a MGW annexation schematic diagram in the prior art;
Fig. 3 is the MGW annexation schematic diagram behind the embodiment of the invention E1 line label;
The annexation schematic diagram of MSC and BSC when Fig. 4 is the calling of this intra-office of the embodiment of the invention;
Fig. 5 is the method flow diagram that the embodiment of the invention one detects circuit state between media gateway;
Fig. 6 is the method flow diagram that the embodiment of the invention two detects circuit state between media gateway;
Fig. 7 is the structure chart of the embodiment of the invention three switching centers;
Fig. 8 is the structure chart of embodiment of the invention four-way communication system.
Embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments, but the present invention is not limited to the following examples.
The embodiment of the invention adopts true method of calling out that the connecting circuit between a plurality of MGW under the MSC is tested, all distribute a label at first for every E1 line of test intra-office, the E1 line label and the circuit number of nominative testing circuit in call number then, carry out test call, if call through illustrates that then this circuit is for normal.Consider that the circuit sum on the E1 line is limited, promptly when 32 circuit are all taken by calling, can't newly-built test call, so the embodiment of the invention is all carried out the test of circuit state under not by the situation of absorb at the circuit on the E1 line.
Embodiment one
Present embodiment is that example describes with the outbound call, and referring to Fig. 1, MSC2 links to each other with MSC3 with MSC1 respectively, is connected with BSC1 below the MSC1, is connected with BSC2 below the MSC3.Gateway annexation under the MSC2 of test office comprises five gateway: MGW1, MGW2, MGW3, MGW4 and MGW5 as shown in Figure 3.Suppose the user under the customer call BSC2 under the BSC1, referring to Fig. 5, the embodiment of the invention provides a kind of method that detects circuit state between media gateway, specifically may further comprise the steps:
Step 101: all distribute a label at first for every E1 line between test intra-office gateway, as shown in Figure 3, for example, E1 line label between MGW1 and the MGW4 is 1, an E1 line label between MGW1 and the MGW2 is 2, another E1 line label is 3, and the E1 line label between MGW2 and the MGW3 is 5 or the like; And the media gateway at the label of every E1 line and these E1 line two ends is kept in the form, as shown in table 1:
| E1 line label | One end media gateway | Other end media gateway |
| 1 | MGW1 | MGW4 |
| 2 | MGW1 | MGW2 |
| 3 | MGW1 | MGW2 |
| 4 | MGW1 | MGW3 |
| 5 | MGW2 | MGW3 |
| 6 | MGW3 | MGW5 |
| 7 | MGW2 | MGW5 |
| 8 | MGW4 | MGW5 |
| 9 | MGW4 | MGW5 |
Table 1
Present embodiment supposes that other paths are all normal, only the circuit on the path between MGW2 and the MGW3 (being that label is 5 E1 line) is tested.
Step 102: in MSC1 office and MSC2 office, dispose a test call prefix to test call respectively, as " 123456 ", and the class of service that disposes this prefix is a test call, the service attribute that disposes this test call prefix in MSC1 office is out test call to MSC2 office, and the class of service that disposes this test call prefix in MSC2 office is a test call.
User's place calls number under the step 103:BSC1, call number be the E1 line label of test call prefix, current test circuit and circuit number, with the combination of called true number; Suppose that circuit under test number is 18 (circuit number is the natural number between 1 to 32), then call number is: " the called true number of test call prefix 123456+E1 line label 5+ circuit number 18+ ", called true number is the number of the user under the BSC2.
Step 104:MSC1 office analyzes call number after receiving calling subscriber's calling, routes calls to MSC2 office according to the test call prefix.
After call number is received by step 105:MSC2 office, call number is analyzed, removed test call prefix " 123456 ", and take out the E1 line label 5 and the circuit number 18 of current test circuit, obtain called subscriber's genuine number.
Step 106:MSC2 is according to E1 line label 5, selects the media gateway through current test circuit, and to be chosen as circuit number on E1 line 5 be 18 circuit; Route the call to MSC3 office then;
Wherein select the process of the media gateway of the current test circuit of process specifically to comprise:
1) selected Incoming media gateway is MGW1, and selected out media gateway is MGW5;
2) suppose that label is that 5 E1 line does not exist, promptly in table 1 in the scope except that E1 line label is that list item of 5, utilize the BFS algorithm to find the path of a MGW1 to the path of MGW2 and MGW3 to MGW5;
3) path (be label be 5 E1 line) and the MGW3 of MGW1 to the path of MGW2, MGW2 to MGW3 combined successively to the path of MGW5, as the path from MGW1 to MGW5, promptly last selected media gateway path through current test circuit is: MGW1, MGW2, MGW3 and MGW5;
Perhaps specifically comprise:
1) selected Incoming media gateway is MGW1, and selected out media gateway is MGW5;
2) suppose that label is that 5 E1 line does not exist, promptly in table 1 in the scope except that E1 line label is that list item of 5, utilize the BFS algorithm to find the path of a MGW1 to the path of MGW3 and MGW2 to MGW5;
3) path (be label be 5 E1 line) and the MGW2 of MGW1 to the path of MGW3, MGW3 to MGW2 combined successively to the path of MGW5, as the path from MGW1 to MGW5, promptly last selected media gateway path through current test circuit is: MGW1, MGW3, MGW2 and MGW5.
Step 107:MSC3 office carries out normal prefix analysis and route analysis, connects this calling; According to whether connecting the state of judging test circuit, if connect successfully, then show E1 line label be 5 and circuit number be that 18 circuit state is for normal; If fail call establishment, then show E1 line label be 5 and circuit number be that 18 circuit state is undesired, promptly break down.
Embodiment two
Present embodiment is that example describes with the Home Exchange Call, referring to Fig. 4, two BSC:BSC1 and BSC2 is arranged under the MSC of test office, and the gateway annexation under the MSC comprises five gateway: MGW1, MGW2, MGW3, MGW4 and MGW5 as shown in Figure 3.Suppose the user under the customer call BSC2 under the BSC1, referring to Fig. 6, the embodiment of the invention also provides another to detect the method for circuit state between media gateway, specifically may further comprise the steps:
Step 201: all distribute a label at first for every E1 line between test intra-office gateway, as shown in Figure 3, for example, the E1 line label between MGW1 and the MGW4 is 1, and an E1 line label between MGW4 and the MGW5 is 8, and another E1 line label is 9 or the like; And the media gateway at the label of every E1 line and these E1 line two ends is kept in the form, as shown in table 1.Present embodiment supposes that other paths are all normal, is that circuit on 8 the E1 line is tested to label between MGW4 and the MGW5 only.
Step 202: to test call prefix of test call configuration, as " 123456 ", and the class of service that disposes this test call prefix is a test call in MSC office.
User's place calls number under the step 203:BSC1, call number be the E1 line label of test call prefix, current test circuit and circuit number, with the combination of called true number, suppose that circuit under test number is 25, then call number is: " the called true number of test call prefix 123456+E1 line label 8+ circuit number 25+ ", called true number is the number of the user under the BSC2.
After call number is received by step 204:MSC office, call number is analyzed, removed test call prefix " 123456 ", and take out the E1 line label 8 and the circuit number 25 of current test circuit, obtain called subscriber's genuine number.
Step 205:MSC selects the media gateway through current test circuit according to E1 line label 8, connects this then and calls out, and promptly calls out the user under the BSC2;
Suppose that MGW1 is a caller place gateway, MGW5 is a called place gateway, because label is that the two ends media gateway of 8 E1 line is MGW4 and MGW5, wherein an end media gateway MGW 5 overlaps with called place gateway, and then the selection process of passing through the media gateway of current test circuit specifically comprises:
1) supposes that label is that 8 E1 line does not exist, promptly in table 1, in the scope except that E1 line label is that list item of 8, utilize the BFS algorithm to find the path of a MGW1 to MGW4;
2) path (be label be 8 E1 line) of MGW1 to the path of MGW4 and MGW4 to MGW5 combined, as the path from MGW1 to MGW5, promptly last selected media gateway path through current test circuit is: MGW1, MGW4 and MGW5.
Step 206:MSC office is according to whether connecting the state of judging test circuit, if connects successfully, then show E1 line label be 8 and circuit number be that 25 circuit state is normally; If fail call establishment, then show E1 line label be 8 and circuit number be that 25 circuit state is undesired, promptly break down.
Embodiment three
Referring to Fig. 7, the embodiment of the invention also provides a kind of switching center, comprising:
(1) receiver module is used for being received in the test call that call number has been specified current test circuit;
(2) select module, be used for after receiver module receives test call, select the media gateway of the current test circuit of process to set up test call according to call number;
(3) circuit state determination module is used for when the test call success, and the state of judging current test circuit is for normal, and when test call was failed, the state of judging current test circuit was undesired.
Above-mentioned receiver module specifically is used for the test call of receipt of call number for the combination of the circuit number of default test call prefix, the E1 line label that distributes for current test circuit in advance, current test circuit and called true number;
For example, the call number of the test call that receives is " the true number that 123456+7+9+ is called ", wherein " 123456 " are default test call prefix, and " 7 " are the E1 line label that distributes for current test circuit in advance, and " 9 " are the circuit number of current test circuit.
Above-mentioned switching center also comprises:
The number analysis module is used for after above-mentioned receiver module receives test call, and analyzing calling numbers is removed the test call prefix, and takes out the E1 line label and the circuit number of current test circuit, obtains called true number;
Correspondingly, above-mentioned selection module specifically is used for the E1 line label of the current test circuit that obtains according to the number analysis module, selects the media gateway through current E1 line.
For example, referring to Fig. 3, the call number of supposing the test call that above-mentioned receiver module receives is " the true number that 123456+7+9+ is called ", number analysis module analysis call number then, remove test call prefix " 123456 ", take out the E1 line label 7 and the circuit number 9 of test circuit, obtain called true number; Select module according to E1 line label 7, select the media gateway through E1 line 7: MGW1, MGW2, MGW5, wherein MGW2 is the path through E1 line 7 to the path of MGW5.
Embodiment four
Referring to Fig. 8, the embodiment of the invention also provides a kind of communication system, comprises switching center and media gateway, and switching center comprises:
(1) receiver module is used for being received in the test call that call number has been specified current test circuit;
(2) select module, be used for after receiver module receives test call, from media gateway, select the media gateway of the current test circuit of process to set up test call according to call number;
(3) circuit state determination module is used for when the test call success, and the state of judging current test circuit is for normal, and when test call was failed, the state of judging current test circuit was undesired;
Above-mentioned receiver module specifically is used for the test call of acceptance test number for the combination of the circuit number of default test call prefix, the E1 line label that distributes for current test circuit in advance, current test circuit and called true number.
Above-mentioned switching center also comprises:
The number analysis module is used for after receiver module receives test call, and analyzing calling numbers is removed the test call prefix, and takes out the E1 line label and the circuit number of current test circuit, obtains called true number;
Correspondingly, above-mentioned selection module specifically is used for the E1 line label of the current test circuit that obtains according to the number analysis module, selects the media gateway through current E1 line from media gateway.
For example, referring to Fig. 3, suppose that the E1 line label of the current test circuit that the number analysis module obtains is 9, then select to select in the media gateway of module from Fig. 3 media gateway MGW 1, MGW4, MGW5, wherein MGW4 to the path of MGW5 for through label being the path of 9 E1 line.
The embodiment of the invention by distribute label for the E1 line and in the call number of test call the mode of appointment E1 line label and circuit number, the nominative testing circuit is simple easily; Utilize the BFS algorithm to seek by specifying the media gateway of E1 line, speed is fast, efficient is high; And by the test call prefix is set, and to dispose its service attribute be outbound call, the detection of circuit state between media gateway in the time of can being implemented in outbound call.
Above-described embodiment, the present invention embodiment several more preferably just, the common variation that those skilled in the art carries out in the technical solution of the present invention scope and replacing all should be included in protection scope of the present invention.
Claims (11)
1. a method that detects circuit state between media gateway is characterized in that, described method comprises:
Specify circuit when Pretesting, in the call number of test call, carry described E1 line label and circuit number of working as the circuit of Pretesting, after switching center receives described test call, select the described media gateway of working as the circuit of Pretesting of process according to described call number, if described test call success, then the state of described current test circuit is normal, if the failure of described test call, then the state of described current test circuit is undesired.
2. the method for circuit state between detection media gateway according to claim 1, it is characterized in that, described appointment is when the circuit of Pretesting, carries the E1 line label of described circuit when Pretesting and the step of circuit number and specifically comprise in the call number of test call:
All distribute a label for every E1 line between media gateway;
Give described test call configuration a test call prefix in switching center, and the class of service that disposes this prefix is a test call;
With the E1 line label of described test call prefix, current test circuit and circuit number, with called true number combination after as call number.
3. the method for circuit state is characterized in that between detection media gateway according to claim 2, describedly selects specifically to comprise through the step of the media gateway of described circuit when Pretesting according to described call number:
Described switching center analyzes described call number, removes described test call prefix, and takes out the E1 line label and the circuit number of described current test circuit, obtains called true number; Select the media gateway of the described current test circuit of process then according to described E1 line label.
4. the method for circuit state is characterized in that between detection media gateway according to claim 3, and when test call was outbound call, described step of passing through the media gateway of described current test circuit according to described E1 line label selection comprised:
In advance the label of every E1 line and the media gateway at these E1 line two ends are kept in the form;
At first selected Incoming media gateway and out media gateway, in described form in described call number in the scope the list item at the E1 line place of appointment, utilize the BFS algorithm to find the path of an end media gateway and one path from the other end media gateway of described appointment E1 line to described out media gateway from described Incoming media gateway to described appointment E1 line;
The media gateway of the path of an end media gateway that successively will be, path and the place mix current test circuit of process that is used as selecting then from the other end media gateway of described appointment E1 line to described out media gateway from an end media gateway of described appointment E1 line to other end media gateway from described Incoming media gateway to described appointment E1 line.
5. the method for circuit state is characterized in that between detection media gateway according to claim 3, and when test call was Home Exchange Call, described step of passing through the media gateway of current test circuit according to described E1 line label selection comprised:
In advance the label of every E1 line and the media gateway at these E1 line two ends are kept in the form;
The media gateway at first selected caller place and the media gateway at called place, in described form in described call number in the scope the list item at the E1 line place of appointment, utilize the BFS algorithm to find the path of an end media gateway and one path from the other end media gateway of described appointment E1 line to described called place media gateway from described caller place media gateway to described appointment E1 line;
The media gateway of the path of an end media gateway that successively will be, path and the place mix current test circuit of process that is used as selecting then from the other end media gateway of described appointment E1 line to described called place media gateway from an end media gateway of described appointment E1 line to other end media gateway from described caller place media gateway to described appointment E1 line.
6. a switching center is characterized in that, described switching center comprises:
Receiver module is used for acceptance test and calls out, and has carried the E1 line label and the circuit number of current test circuit in the call number of described test call;
Select module, be used for after described receiver module receives described test call, select the media gateway of the described circuit of process to set up test call according to described call number;
The circuit state determination module is used for when described test call is successful, and the state of judging current test circuit is for normal, and when described test call was failed, the state of judging current test circuit was undesired.
7. switching center according to claim 6, it is characterized in that described receiver module specifically is used for the test call of receipt of call number for the combination of the circuit number of default test call prefix, the E1 line label that distributes for current test circuit in advance, current test circuit and called true number.
8. switching center according to claim 7 is characterized in that, described switching center also comprises:
The number analysis module is used for analyzing described call number after described receiver module receives described test call, removes described test call prefix, and takes out the E1 line label and the circuit number of current test circuit, obtains called true number;
Described selection module specifically is used for the E1 line label of the current test circuit that obtains according to described number analysis module, selects the media gateway through current E1 line.
9. a communication system is characterized in that, described communication system comprises switching center and media gateway,
Described switching center comprises:
Receiver module is used for acceptance test and calls out, and has carried the E1 line label and the circuit number of current test circuit in the call number of described test call;
Select module, be used for after described receiver module receives described test call, from described media gateway, select the media gateway of the described circuit of process to set up test call according to described call number;
The circuit state determination module is used for when described test call is successful, and the state of judging current test circuit is for normal, and when described test call was failed, the state of judging current test circuit was undesired.
10. communication system according to claim 9, it is characterized in that described receiver module specifically is used for the test call of acceptance test number for the combination of the circuit number of default test call prefix, the E1 line label that distributes for current test circuit in advance, current test circuit and called true number.
11. communication system according to claim 10 is characterized in that, described switching center also comprises:
The number analysis module is used for analyzing described call number after described receiver module receives described test call, removes described test call prefix, and takes out the E1 line label and the circuit number of current test circuit, obtains called true number;
Described selection module specifically is used for the E1 line label of the current test circuit that obtains according to described number analysis module, selects the media gateway through current E1 line from described media gateway.
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| CN 200710001123 CN100502583C (en) | 2007-01-18 | 2007-01-18 | Method, switch center and communication system for detecting circuit state of media gateway |
| PCT/CN2008/000108 WO2008089653A1 (en) | 2007-01-18 | 2008-01-16 | A method, a switching center and a communication system for detecting the state of the circuit between the media gateways |
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| CN 200710001123 CN100502583C (en) | 2007-01-18 | 2007-01-18 | Method, switch center and communication system for detecting circuit state of media gateway |
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| CN101150623B (en) * | 2007-10-19 | 2011-09-14 | 华为技术有限公司 | Analog call method, device and system |
| CN101175331A (en) * | 2007-11-13 | 2008-05-07 | 华为技术有限公司 | Call bearing detecting method and mobile switching centre server |
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| DE10135933A1 (en) * | 2001-07-24 | 2003-02-13 | Siemens Ag | Channel connection checking method for telecommunications system uses test signal transmitted in both directions between media gateways at opposite ends of connection |
| KR100480763B1 (en) * | 2002-10-07 | 2005-04-07 | 엘지전자 주식회사 | Off-Hook Event Processing Method of Analog Test Subscriber |
| CN1558613A (en) * | 2004-02-05 | 2004-12-29 | 中兴通讯股份有限公司 | Method for self-detecting speech coding/decoding channel conducting capability for media gateway equipment |
| DE102004043960B3 (en) * | 2004-09-11 | 2006-05-18 | Siemens Ag | Method for testing traffic channels in a telecommunications network |
| CN100502583C (en) * | 2007-01-18 | 2009-06-17 | 华为技术有限公司 | Method, switch center and communication system for detecting circuit state of media gateway |
-
2007
- 2007-01-18 CN CN 200710001123 patent/CN100502583C/en active Active
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2008
- 2008-01-16 WO PCT/CN2008/000108 patent/WO2008089653A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2008089653A1 (en) | 2008-07-31 |
| CN101014174A (en) | 2007-08-08 |
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