CN101783836B - Monitored link switching device, monitored link switching method and network element - Google Patents
Monitored link switching device, monitored link switching method and network element Download PDFInfo
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- CN101783836B CN101783836B CN200910110154.5A CN200910110154A CN101783836B CN 101783836 B CN101783836 B CN 101783836B CN 200910110154 A CN200910110154 A CN 200910110154A CN 101783836 B CN101783836 B CN 101783836B
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Abstract
The invention relates to a monitored link switching device, which comprises a link control module, a call monitoring module and a database module, wherein the link control module and the call monitoring module are used to monitor whether a current monitored link is abnormal; the database module is used to re-determine a monitored link among all available links when the current monitored link is abnormal; and the call monitoring module is also used to judge whether the abnormal monitored link has a monitored speech path and switch the monitored link if the monitored speech path exists. The invention also provides a network element and a monitored link switching method. The monitored link switching device, the monitored link switching method and the network element for setting the monitored link switching device in the embodiment of the invention not only can multiplex messages of X1, X2 and X3 channels through the links to monitor monitored network elements, but also can switch the monitored links if the monitored links are abnormal in the monitoring process.
Description
Technical field
The present invention relates to the switching technology of the communications field, in particular to a kind of monitored link changeover apparatus, the method that monitored link is switched and network element.
Background technology
Lawful Interception is the requirement according to state's laws, authorizes state security organization to require Virtual network operator or service provider that the snoop results of specific objective is provided to specific monitoring authorities or actuator (LEA).Now, operator need provide monitoring trigger interface, and equipment manufacturers need to provide monitoring network side voice and event to transmit solution.
Utilize exchange and disposal ability and the existing telecommunication service function of telecommunication exchanger system, monitoring personnel, by monitored number being set and monitoring number, realize monitored target are realized.But above-mentioned monitoring system lacks switching monitored link.
And communication system General Requirements can provide reliable persistent service for user, especially in the application of some important service, it is 99.999% even higher that its availability requirement can reach.Therefore require the equipment that communication system is used need to have very high reliability.Monitor product and for general communication products, need to have higher reliability.All unrealized in current monitoring standard to the switching of monitored link, the stability of monitored link is related to national security, is necessary thus realize the backup of monitored link and switch.
In addition, existing Lawful Interception technology is online by the time gas exchange at monitored network element, and bypass goes out the voice of monitored network element, and the E1 link transmission of passing through standard is to listening center.Existing monitoring interface comprises that establishing control query interface, call state reports interface and call contents interface.The networking structure of existing monitoring network comprises listening center and monitored network element, passage between listening center and monitored network element comprises: first passage X1, second channel X2 and third channel X3, wherein: the result that X1 passage is carried out for transmitting various instructions that listening center issues to monitored network element and instruction, described instruction comprise monitoring startup, stop, the deploying to ensure effective monitoring and control of illegal activities, upgrade, delete of monitored network element, the request of monitored network element data, and report monitored network element to monitoring the response message of instruction; X2 passage is set up the various call informations in calling, dismantling call stage for call state and the monitored network element real-time report of the monitored network element of transmitting, monitoring center active inquiry to the monitored network element of listening center, the location updating message of monitored network element, and the information of monitored network element while sending SMS message etc.; Third channel X3 is for sending monitored network element calling procedure voice/data information to listening center.
Conventionally, the transfer of data of passage X1 and passage X2 passage is followed ITU-T X.25 agreement or ICP/IP protocol, and the voice transfer of passage X3 is followed multiplexing standard, and this multiplexing standard is by the E1 Interface realization of standard.
As can be seen from the above, between listening center and monitored network element, need there are the multiple interfaces such as E1, X25, TCP/IP.Thereby, will increase the management difficulty of monitored network element, some comparatively outmoded network element does not have X25, and the interface of the types such as TCP/IP cannot transmit X1, the message of X2 passage, thereby cannot realize its monitoring.
Therefore, there is following shortcoming in existing listening mode: owing to lacking the switching of monitored link, at link, occur abnormal in the situation that realizing real-time listening, and for not having the equipment of TCP/IP or X25 interface cannot realize monitoring.
Summary of the invention
A kind of method that the object of the present invention is to provide monitored link changeover apparatus and monitored link is switched, for solving the problem that occurs cannot realizing abnormal in the situation that real-time listening in above-mentioned monitored link.
The invention provides a kind of monitored link changeover apparatus, comprise link control module, call monitoring module and database module, wherein: whether link control module and call monitoring module occur extremely for detection of current monitored link; Database module when abnormal, redefines monitored link for occurring in current monitored link in all available links; Call monitoring module is also for judging that whether abnormal monitored link occurs the speech channel of monitoring, if there is the speech channel of monitoring, carries out monitored link and switches.
Preferably, whether above-mentioned link control module also occurs for send handshake information detection link to listening center extremely.
Preferably, above-mentioned call monitoring module is also for obtaining the message of the X2 passage that listening center issues, and judges according to the message of X2 passage whether current monitored link occurs extremely.
Preferably, above-mentioned monitored link changeover apparatus also comprises timeslot multiplex module and coding/decoding module:
Preferably, above-mentioned timeslot multiplex module sends to coding/decoding module for receiving the also message of demultiplexing link X2 passage by link control module; Coding/decoding module for to the message of X2 passage decode and decipher after send to call monitoring module.
Preferably, above-mentioned call monitoring module is also for judging that the message of X2 passage is the message that call progress message or monitored link are switched.
Preferably, above-mentioned monitored link changeover apparatus also comprises Call Control Block, for removing, abnormal monitored link occurs.
Preferably, also there is the abnormal shared resource of monitored link for discharging in above-mentioned database module.
The method that monitored link is switched, comprising: whether link control module or call monitoring module detect current monitored link and occur extremely, if occur, extremely, by database module, in all available links, redefines monitored link; Whether abnormal monitored link occurs the judgement of call monitoring module the speech channel of monitoring, if there is the speech channel of monitoring, carries out monitored link and switches.
Preferably, whether above-mentioned link control module regularly occurs to listening center transmission handshake information detection link by timeslot multiplex module extremely.
Preferably, above-mentioned call monitoring module is by the message of the passage that obtains listening center and issue, and judges according to the message of passage whether current monitored link occurs extremely.
Preferably, above-mentioned call monitoring module is by the message of the passage that obtains listening center and issue, and judge that according to the message of X2 passage whether current monitored link the message of X2 passage in the reception of timeslot multiplex module demultiplexing link occurs extremely to comprise the steps:, sends to coding/decoding module; Coding/decoding module the message of X2 passage is decoded and decipher after send to call monitoring module; The message of call monitoring module judgement X2 passage is the message that call progress message or monitored link are switched; If the message of this X2 passage is the message that monitored link is switched, described in described call monitoring module judgement message, link occurs abnormal.
Preferably; above-mentioned call monitoring module is by the message of the X2 passage that obtains listening center and issue; and judge according to the message of X2 passage whether current monitored link occurs extremely also to comprise: if the message of described X2 passage is call progress message, enter call progress Message Processing flow process.
Preferably, there is the speech channel whether abnormal monitored link has monitoring in above-mentioned call monitoring module judgement, if there is the speech channel of monitoring, carrying out the step that monitored link switches specifically comprises: call monitoring module sends removes chain circuit message to Call Control Block, and then sends releasing resource message to database module; Call Control Block is removed abnormal monitored link is occurred, and database module discharges the abnormal shared resource of monitored link occurs.
Preferably, there is the speech channel whether abnormal monitored link has monitoring in above-mentioned call monitoring module judgement, if there is the speech channel of monitoring, carrying out the step that monitored link switches also comprises: call monitoring module sends Resources allocation message to database module, then sends and sets up chain circuit message to Call Control Block; Database module distributes monitor resource to the monitored link redefining, and the monitored link that Call Control Block foundation redefines is monitored.
The present invention also provides a kind of network element, comprises above-mentioned monitored link changeover apparatus.
Monitored link changeover apparatus in the embodiment of the present invention, the method that monitored link is switched, and the network element that monitored link changeover apparatus is set, not only can to monitored network element, monitor by the message of the multiplexing X1 of link, X2 and X3 passage, if also can monitored link occur extremely, monitored link to be switched in snoop procedure.
Accompanying drawing explanation
Figure 1 shows that the structural representation of a kind of monitoring system embodiment of the present invention;
Fig. 2 is the structural representation of a kind of monitored link changeover apparatus of the present invention embodiment;
Figure 3 shows that the flow chart of a kind of monitored link embodiment of the method for the present invention;
Figure 4 shows that the flow chart of a kind of embodiment of the method that monitored link is switched of the present invention.
The realization of the object of the invention, functional characteristics and advantage, in connection with embodiment, are described further with reference to accompanying drawing.
Embodiment
Below in conjunction with the drawings and specific embodiments, technical scheme of the present invention is described in further detail, so that those skilled in the art can better understand the present invention also, can be implemented, but illustrated embodiment is not as a limitation of the invention.
Figure 1 shows that the structural representation of a kind of monitoring system embodiment of the present invention.
Between listening center and monitored network element, by n (n >=2) bar link (such as E1 link) at least, be connected, every link comprises 32 time slots (TS1～TS332), and wherein time slot TS1 and TS17 are for clock synchronous.In the present embodiment, from time slot TSi (2≤i≤16) and TSj (18≤j≤32), take out the information that two time slots are respectively used to multiplexing X1 and X2 passage totally 30 time slots, other 28 time slots are for transmitting the information of X3 passage.
The monitored network element of interfaces such as not being provided with X25 interface and TCP/IP of take is below example, illustrate that the present invention monitors monitored network element by the message of the multiplexing X1 of E1 link, X2 and X3 passage, and if monitored link occurs extremely in snoop procedure, the principle that monitored link is switched.
Fig. 2 is the structural representation of a kind of monitored link changeover apparatus of the present invention embodiment.
In the present embodiment, monitored link changeover apparatus is arranged in monitored network element, after monitored network element is provided with above-mentioned link switchover device, not only can to monitored network element, monitor by the message of the multiplexing X1 of E1 link, X2 and X3 passage, also can be in snoop procedure monitored link occur when abnormal, monitored link to be switched.
Monitored link changeover apparatus comprises timeslot multiplex module 101, link control module 102, coding/decoding module 103, X1 processing module 104, database module 105, call monitoring module 106 and Call Control Block 107.
Timeslot multiplex module 101 for by the message reuse of X1, X2, X3 passage to the different time-gap of link and send to listening center, and the message that goes out X1, X2, X3 passage from each timeslot demultiplex of link, and issue coding/decoding module 103 or directly issue listening center by link control module 102.
Whether link control module 102 occurs for detection of current monitored link extremely.In the present embodiment, whether link control module occurs by send handshake information detection link to listening center extremely.
Coding/decoding module 103 is for encoding, decode, encrypt or decipher the message of X1, X2 passage, and the message after coding and encryption is issued to timeslot multiplex module 101, the message after decoding and deciphering is issued to link control module 102 or call monitoring module.
There is abnormal monitored link for removing in Call Control Block 107, and the monitored link that Call Control Block 107 foundation redefine is monitored.
Figure 3 shows that the flow chart of a kind of monitored link embodiment of the method for the present invention.
Step S301, initialization data library module 105, the described database module 105 current monitored link information of storage and all available link information.In the present embodiment, total n (L1 is to Ln) bar link, wherein article one link L1 is defaulted as monitored link, and all normal at each link of initial condition.
By after data base initialize, in the process that link is monitored, listening center also may issue to monitored network element the message of X1 passage, and now monitored network element will obtain the message of the X1 passage that listening center issues, and according to the information updating database of X1 passage, be specially:
The message of X1 passage in 101 receptions of timeslot multiplex module demultiplexing link, and send to coding/decoding module 103; The message of 103 pairs of X1 passages of coding/decoding module is decoded and is deciphered and send to X1 processing module 104; X1 processing module 104 receives after the message of X1 passage, and renewal instruction entrained in the message of X1 passage is issued to database module 105; Database module 105 arranges database according to upgrading instruction, and produces renewal result.This renewal result will send to coding/decoding module 103 carries out sending to timeslot multiplex module 101 after encoding and decoding, and sends to listening center, as the response of the renewal instruction to listening center.
Step S302, Call Control Block 107 sent to database module 105 number that message requires the monitored network element of coupling before call setup.
Step S303, sends and receives the response to Call Control Block 107 after the number success of the monitored network element of database module 105 coupling.
Step S304, Call Control Block 107 sends message to call monitoring module 106 and monitors to trigger, and carries the numbering of monitored network element and the unique number of this calling in this message.
Step S305, call monitoring module 106 is received after the message that Call Control Block 107 reports, and sends a message to database module 105 application monitored link.
Step S306, database module 105 is chosen monitored link from available link, and gives the resource of call monitoring module 106 return messages explanation monitored link.
Step S307,106 message of call monitoring module, to Call Control Block 107, are monitored by selected monitored link to trigger Call Control Block 107.
Step S308, after Call Control Block 107 monitored link, the speech channel listening to is issued to timeslot multiplex module 101 by X3 passage, Call Control Block 107 also sends the call progress message of X2 passage to timeslot multiplex module 101 simultaneously, the numbering that comprises monitored network element in the message of this X2 passage, the unique number of this time calling out, the numbering of monitored link, the timeslot number in monitored link.
Step S309, timeslot multiplex module 101 sends to listening center after receiving the message of X2 and X3 passage.
Step S310, listening center obtains X2 from E1 link, the message of X3 passage, by X2, the message in X3 passage and the monitored call time slot in the E1 monitored link that continues.
In the process of monitored network element being monitored at listening center, the monitored link of monitoring likely occurs extremely, now will enter the method flow diagram that monitored link is switched shown in Fig. 4.
Figure 4 shows that the flow chart of a kind of embodiment of the method that monitored link is switched of the present invention.
Step S401, link control module 102 or call monitoring module 106 detect current monitored link.
Step S402, link control module 102 or call monitoring module 106 judge whether current monitored link occurs extremely.If occur, extremely, enter step S403; If no exceptions, returns to step S401.
Whether 106 of call monitoring modules are by passive mode, to detect current link to occur extremely, in other words, call monitoring module 106 is by the message of the X2 passage that obtains listening center and issue, and judges according to the message of X2 passage whether current monitored link occurs extremely, to be specially:
In 101 receptions of timeslot multiplex module demultiplexing link, the message of X2 passage, sends to coding/decoding module 103; The message of 103 pairs of X2 passages of coding/decoding module decode and decipher after send to call monitoring module 106; The message of call monitoring module 106 judgement X2 passages is the message that call progress message or monitored link are switched; If the message of this X2 passage is the message that monitored link is switched, described in described call monitoring module 106 judgement message, link occurs abnormal; Call progress message, enters call progress Message Processing flow process if.
Step S403, database module 105 selects link as the monitored link redefining in all available links.
Step S404, whether abnormal monitored link occurs 106 judgements of call monitoring module the speech channel of monitoring, if there is the speech channel of monitoring, enters step S405, carries out monitored link and switches, otherwise do not switch.In the present embodiment, carry out the step that monitored link switches and specifically comprise: call monitoring module 106 sends removes chain circuit messages to Call Control Block 107, and sends releasing resource message to database module 105; Call Control Block 107 is removed abnormal monitored link is occurred, and database module 105 discharges the abnormal shared resource of monitored link occurs; Call monitoring module 106 sends Resources allocation message to database module 105, and the resource of then distributing according to database module 105 sends sets up chain circuit message to Call Control Block 107; Database module 105 distributes monitor resource to the monitored link redefining, and the monitored link that Call Control Block 107 foundation redefine is monitored.
As seen from the above technical solution provided by the invention, to prior art, corresponding the present invention has with following advantage:
(1) owing to being provided with monitored link changeover apparatus in monitored network element, can be in link multiplexing X1, the message of X2 passage, does not have X25 thereby monitor, the monitored network element of the interface of the types such as TCP/IP, and in the situation that monitored network element is less, reduce the use of monitored link;
(2) due to the function of having used monitored link to switch, can current monitored link occur abnormal time, realize auto switching and proceed to monitor to other available monitored link, guaranteed the quality of monitoring.
(3) the link of the primary link of conduct can not shared the pressure of monitored call at ordinary times, improves the capacity of monitored call.
The foregoing is only the preferred embodiments of the present invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes specification of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (12)
1. a monitored link changeover apparatus, is characterized in that, comprises timeslot multiplex module, coding/decoding module, link control module, call monitoring module and database module, wherein:
Described timeslot multiplex module sends to coding/decoding module for receiving the also message of demultiplexing link X2 passage by link control module;
Coding/decoding module for to the message of X2 passage decode and decipher after send to call monitoring module;
Described call monitoring module is for judging according to the message of X2 passage whether current monitored link occurs extremely;
Whether described link control module occurs extremely for detection of current monitored link;
Database module when abnormal, redefines monitored link for occurring in current monitored link in all available links;
Call monitoring module is also for judging that whether abnormal monitored link occurs the speech channel of monitoring, if there is the speech channel of monitoring, carries out monitored link and switches.
2. monitored link changeover apparatus as claimed in claim 1, is characterized in that, whether described link control module also occurs for send handshake information detection link to listening center extremely.
3. monitored link changeover apparatus as claimed in claim 1, is characterized in that, described call monitoring module is also for judging that the message of X2 passage is the message that call progress message or monitored link are switched.
4. monitored link changeover apparatus as claimed in claim 1, is characterized in that, also comprises Call Control Block, for removing, abnormal monitored link occurs.
5. monitored link changeover apparatus as claimed in claim 4, is characterized in that, described database module also for discharging, the abnormal shared resource of monitored link occurs.
6. a network element, comprises the monitored link changeover apparatus as described in claim 1 to 5 any one.
7. a method of monitored link being switched, is applied to network element claimed in claim 6, it is characterized in that, the described method that monitored link is switched comprises:
In the reception of timeslot multiplex module demultiplexing link, the message of X2 passage, sends to coding/decoding module;
Coding/decoding module the message of X2 passage is decoded and decipher after send to call monitoring module;
Call monitoring module judges according to the message of X2 passage whether current monitored link occurs extremely;
Whether link control module detects current monitored link and occurs extremely, if occur, extremely, by database module, in all available links, redefines monitored link;
Whether abnormal monitored link occurs the judgement of call monitoring module the speech channel of monitoring, if there is the speech channel of monitoring, carries out monitored link and switches.
8. the method that monitored link is switched as claimed in claim 7, is characterized in that, whether described link control module regularly sends handshake information detection link by timeslot multiplex module to listening center and occur extremely.
9. the method that monitored link is switched as claimed in claim 7, it is characterized in that, described call monitoring module is by the message of the X2 passage that obtains listening center and issue, and judges according to the message of X2 passage whether current monitored link occurs extremely to comprise the steps:
The message of call monitoring module judgement X2 passage is the message that call progress message or monitored link are switched;
If the message of this X2 passage is the message that monitored link is switched, described in described call monitoring module judgement message, link occurs abnormal.
10. the method that monitored link is switched as claimed in claim 9; it is characterized in that; described call monitoring module is by the message of the X2 passage that obtains listening center and issue; and judge according to the message of X2 passage whether current monitored link occurs extremely also to comprise: if the message of described X2 passage is call progress message, enter call progress Message Processing flow process.
11. methods that monitored link is switched as claimed in claim 7, is characterized in that, whether abnormal monitored link occurs the judgement of described call monitoring module the speech channel of monitoring, if there is the speech channel of monitoring, carries out the step that monitored link switches and specifically comprise:
Call monitoring module sends removes chain circuit message to Call Control Block, then sends releasing resource message to database module;
Call Control Block is removed abnormal monitored link is occurred, and database module discharges the abnormal shared resource of monitored link occurs.
12. methods that monitored link is switched as claimed in claim 11, is characterized in that, whether abnormal monitored link occurs the judgement of described call monitoring module the speech channel of monitoring, if there is the speech channel of monitoring, carries out the step that monitored link switches and also comprise:
Call monitoring module sends Resources allocation message to database module, and the resource of then distributing according to database module sends and sets up chain circuit message to Call Control Block;
Database module distributes monitor resource to the monitored link redefining, and the monitored link that Call Control Block foundation redefines is monitored.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910110154.5A CN101783836B (en) | 2009-11-11 | 2009-11-11 | Monitored link switching device, monitored link switching method and network element |
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| CN200910110154.5A CN101783836B (en) | 2009-11-11 | 2009-11-11 | Monitored link switching device, monitored link switching method and network element |
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| CN101783836B true CN101783836B (en) | 2014-04-09 |
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| CN105656836A (en) * | 2014-11-11 | 2016-06-08 | 中兴通讯股份有限公司 | Secure monitoring method and system |
| CN107948173B (en) * | 2017-11-30 | 2020-09-29 | 华北电力大学（保定） | Monitoring method |
| CN113452577B (en) * | 2021-06-25 | 2024-02-06 | 维沃移动通信有限公司 | Abnormality detection method and device and electronic equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101141391A (en) * | 2007-10-09 | 2008-03-12 | 中兴通讯股份有限公司 | Method for implementing fault switching |
| CN101222364A (en) * | 2008-01-23 | 2008-07-16 | 中兴通讯股份有限公司 | Method for recovering local span mesh network in automatic exchanging optical network |
| CN101631088A (en) * | 2009-08-18 | 2010-01-20 | 中兴通讯股份有限公司 | Method and device for processing link failure |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101141391A (en) * | 2007-10-09 | 2008-03-12 | 中兴通讯股份有限公司 | Method for implementing fault switching |
| CN101222364A (en) * | 2008-01-23 | 2008-07-16 | 中兴通讯股份有限公司 | Method for recovering local span mesh network in automatic exchanging optical network |
| CN101631088A (en) * | 2009-08-18 | 2010-01-20 | 中兴通讯股份有限公司 | Method and device for processing link failure |
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