CN101237486B - Device for converting TDM media into IP media and method for using this device - Google Patents

Device for converting TDM media into IP media and method for using this device Download PDF

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CN101237486B
CN101237486B CN2008100063429A CN200810006342A CN101237486B CN 101237486 B CN101237486 B CN 101237486B CN 2008100063429 A CN2008100063429 A CN 2008100063429A CN 200810006342 A CN200810006342 A CN 200810006342A CN 101237486 B CN101237486 B CN 101237486B
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medium
processing unit
tdm
signalling system
signaling
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CN101237486A (en
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许建昆
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ZTE Corp
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ZTE Corp
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Abstract

The present invention provides a device for converting TDM media into IP media and a method using the same; the device comprises a first module and a second module, wherein the first module comprises a number 7signaling processing unit and an SIP signaling processing unit, wherein, the number 7signaling processing unit sends response messages to the SIP signaling processing unit, is connected with a monitored target, and controls a number 7 signaling to be converted into an SIP signaling; the SIP signaling processing unit carries out processing, explanation, receiving and sending of the SIP signaling according to the response information sent from the number 7 signaling processing unit; the second module comprises a TDM-to-IP processing unit which carries out the transmission of the TDM media and the IP media, and a media converting unit which carries out the conversion from the TDM media to the IP media.

Description

The device of TDM media conversion IP medium and use the method for this device
Technical field
The present invention relates to a kind of TDM (circuit switching) media conversion be become device that the IP medium monitor and the method for using this device, it makes legal monitor centers can use common mechanism, insert and use the quilt of various monitoring protocols to monitor network element, no matter be TDM mode or IP mode, can carry out the monitoring of media business.
Background technology
In recent years, development along with the International Politics form, LIC (Lawful InterceptionCenter, legal monitor centers) paid attention to by each nation's security department more and more, become safeguard national security, obtain necessary national security information a kind of communication network is monitored and information is obtained effective means.According to monitoring model, at LIC with between, also have a snoop agents equipment by the monitoring network element, be referred to as motoring gateway (LIG (LawfulInterception Gateway)) here.
LIC mainly is the monitoring that concentrates on traditional TDM network in early days, continuous development along with the communication technology, the development of second generation mobile communication technology, the NGN communication technology and 3G, make the client have higher requirement, require LIC can realize monitoring mobile network, NGN and 3G network to the covering field of LIC.
Various network has defined different monitoring protocols.For example, in China, PSTN (Public Switched Telephone Network, public switch telephone network) network has " fixed network calling of switchboard transfer service technical specification ", GSM (Global System For Mobile Communication, global system for mobile communications) network can use " TDMA (Time Division Multiple Access) digital cellular mobile communication systems policing interface (lawful interception interface) technical specification ", CDMA (Code Division Multiple Access, CDMA multiplexing) network can use " CDMA2000 digital cellular mobile communication systems policing interface (lawful interception interface) technical specification ", NGN (Next Generation Network, next generation network) network can use " specification requirement of soft switchcall server policing interface (lawful interception interface) " etc.
But the communication network of present stage, no matter be fixed communication network, or mobile radio communication, still support the communication of TDM mode mostly, the TDM communication mode still is main communication mode in present stage, but along with the development of technology, the communication of IP mode is more and more general, and is the trend of communicating by letter from now on.
In addition, perhaps by supporting the TDM mode to insert legal monitor centers, perhaps support the IP mode to insert legal monitor centers, wherein, the work of motoring gateway is exactly the requirement according to legal monitor centers, the transmission means of communication network is converted into the access way that is fit to legal monitor centers, thereby realizes Lawful Interception.
Therefore, need a kind of legal monitor centers that can allow to continue to realize technology to the monitoring of all communication networks.
Summary of the invention
In view of the above problems, the object of the invention be to provide a kind of with the TDM media conversion to the device of IP medium and use the method for this device.
According to an aspect of the present invention, provide a kind of with the device of TDM media conversion to the IP medium, this device comprises: first module and second module, wherein, first module comprises: the signaling receiving element is used to receive the signalling system No.7 from intercept target, and sends to the signalling system No.7 processing unit; The signalling system No.7 processing unit is used for sending response message to the SIP Signaling Processing Unit according to the signalling system No.7 that receives, and the signalling system No.7 processing unit docks with intercept target, and the control signalling system No.7 is converted to the SIP signaling; And SIP Signaling Processing Unit, be used for basis from the response message that the signalling system No.7 processing unit sends, carry out SIP signaling process, explanation and transmitting-receiving, second module comprises: the medium receiving element, be used to receive TDM medium, and send to TDM commentaries on classics IP processing unit from intercept target; TDM changes the IP processing unit, is used to carry out the transmission of TDM medium and IP medium; Medium conversion unit is used to carry out the conversion of TDM medium to the IP medium; And IP medium transmitting element, be used for the IP medium are sent to listening center.
And signalling system No.7 processing unit and SIP Signaling Processing Unit control TDM change the action of IP processing unit, and the port that TDM provides when changeing the IP processing unit according to signaling process carries out the forwarding of media data.The medium receiving element is a TU Trunk Unit.
According to a further aspect in the invention, provide a kind of said apparatus that uses to carry out the method for TDM medium to the IP media conversion, it may further comprise the steps: send to listening center by first module after handling from the signaling of intercept target; And after changing, send to listening center from the medium of intercept target by second module.
Sent in the step of listening center after handling from the signaling of intercept target by first module, may further comprise the steps: the signaling receiving element receives signalling system No.7 from intercept target, and sends to the signalling system No.7 processing unit; Receive the signalling system No.7 that sends from the signaling receiving element by the signalling system No.7 processing unit, and send response message to the SIP Signaling Processing Unit according to the signalling system No.7 that receives; And the SIP Signaling Processing Unit produces corresponding SIP signaling according to the response message that sends from the signalling system No.7 processing unit, and sends to listening center.
Sending in the step of listening center after changing by second module, may further comprise the steps: receiving the TDM medium by the medium receiving element from intercept target, and send to TDM commentaries on classics IP processing unit from the medium of intercept target; TDM changes the IP processing unit and receives the TDM medium that send from the medium receiving element, and the TDM medium are sent to medium conversion unit; Medium conversion unit receives from TDM changes the TDM medium that the IP processing unit sends, and after the TDM media conversion was the IP medium, the IP medium are sent to TDM changeed the IP processing unit; TDM changes the IP processing unit and receives the IP medium that send from medium conversion unit, and the IP medium are sent to IP medium transmitting element; And IP medium transmitting element sends to listening center with the IP medium.
In said method, signalling system No.7 processing unit and SIP Signaling Processing Unit control TDM change the action of IP processing unit, and the port that TDM provides when changeing the IP processing unit according to signaling process carries out the forwarding of media data.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification of being write, claims and accompanying drawing.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used from explanation the present invention with embodiments of the invention one, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is with the structured flowchart of TDM media conversion to the device of IP medium according to of the present invention;
Fig. 2 is the schematic diagram that changes the signaling process of IP medium according to the TDM of the embodiment of the invention;
Fig. 3 is the schematic diagram that changes the medium processing of IP medium according to the TDM of the embodiment of the invention;
Fig. 4 is the flow chart that changes the handling process of IP medium according to the TDM of the embodiment of the invention; And
Fig. 5 is the method for media conversion is carried out the TDM media conversion in use according to the present invention to the device of IP medium a flow chart.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, and be not used in qualification the present invention.
Fig. 1 is with the structured flowchart of TDM media conversion to the device of IP medium according to of the present invention.
As shown in Figure 1, the device 100 that TDM medium (fax) is transformed into the IP medium comprises: first module 102 and second module 104,
Wherein, first module 102 comprises:
Signalling system No.7 processing unit 1024 is used for sending response message to SIP Signaling Processing Unit 1026 according to the signalling system No.7 that receives, and signalling system No.7 processing unit 1024 docks with intercept target, and the control signalling system No.7 is converted to the SIP signaling; And
SIP Signaling Processing Unit 1026 is used for basis from the response message that signalling system No.7 processing unit 1024 sends, and carries out SIP signaling process, explanation and transmitting-receiving,
Second module 104 comprises:
TDM changes IP processing unit 1044, is used to carry out the transmission of TDM medium and IP medium; And
Medium conversion unit 1046 is used to carry out the conversion of TDM medium to the IP medium.
Wherein, above-mentioned first module 102 also comprises the signaling receiving element, is used to receive the signalling system No.7 from intercept target, and sends to signalling system No.7 processing unit 1024.
In addition, above-mentioned second module 104 also comprises the medium receiving element, is used to receive the TDM medium from intercept target, and sends to TDM commentaries on classics IP processing unit 1044.
Above-mentioned second module 104 also comprises IP medium transmitting element, is used for the IP medium are sent to listening center.
And signalling system No.7 processing unit and SIP Signaling Processing Unit 1026 control TDM change the action of IP processing unit 1044, and TDM changes IP processing unit 1044 and carries out the forwarding of media data according to the port that signaling process provides.The medium receiving element is a TU Trunk Unit.
Fig. 2 is the schematic diagram that changes the signaling process of IP medium according to the TDM of the embodiment of the invention.
As shown in Figure 2, signalling system No.7 is sent to the signalling system No.7 processing unit by the signalling system No.7 receiving element and handles, the signalling system No.7 processing unit is according to the signalling system No.7 that receives, the message that sends response is to the SIP Signaling Processing Unit, the SIP Signaling Processing Unit is according to the response message of receiving, the SIP signaling that sends response is to legal monitor centers LIC, wherein, because signalling system No.7 and SIP signaling have clearly different on the control and treatment of communication process, Signaling Processing Unit has also played adaptive effect.Signaling Processing Unit (signalling system No.7 processing unit and SIP Signaling Processing Unit) has been realized the conversion of signalling system No.7 to the SIP signaling, and control TDM changes the operation of IP processing unit.
Fig. 3 is the schematic diagram that changes the medium processing of IP medium according to the TDM of the embodiment of the invention.Wherein, the process of medium processing is controlled by the signalling system No.7 processing unit.
As shown in Figure 3, the medium receiving element is received the TDM medium of being sent by intercept target, send to TU Trunk Unit (medium receiving element) then, by TU Trunk Unit the TDM medium that receive are sent to TDM and change the IP processing unit, and change the IP processing unit by TDM the TDM medium that receive are sent to medium conversion unit, after by medium conversion unit the TDM media conversion being the IP medium, the IP medium are sent to TDM change the IP processing unit, change the IP processing unit by TDM again these IP medium are sent to IP medium transmitting element, thereby send to listening center LIC by IP medium transmitting element.The conversion that the TDM medium flow to IP medium bag is carried out in order according to the signalling system No.7 processing unit, and the IP medium bag of generation is delivered to legal monitor centers.
Wherein, medium conversion unit and signalling system No.7 processing unit mainly are divisions in logic, both can be two different physical equipments physically, also can be two different logical blocks on the same physical equipment.
Fig. 4 is the flow chart that changes the handling process of IP medium according to the TDM of the embodiment of the invention, is further described specifically below in conjunction with Fig. 2, Fig. 3, Fig. 4.
Signaling Processing Unit is responsible for safeguarding and is one or more by the signalling path between the intercept target, and the signalling path between maintenance and control and the one or more legal monitor centers.Medium are transmitted and are subjected to the signaling processing controls, and the port that provides according to signaling process carries out the forwarding of media data.
Concrete call flow comprises:
The fax beginning, the sign that in signalling system No.7, not necessarily can have fax, even if in communication process, send a fax, on signalling system No.7, do not have any message, at this moment, whether be fax, if fax then needs by medium conversion unit notice media processing units (TDM changes the IP processing unit) and SIP Signaling Processing Unit if needing to rely on the medium receiving element to detect Media Stream in real time;
The message that Signaling Processing Unit and media processing units need the receiving media converting unit to send determines that generating T38 still is the fax of T30 from fax;
After the SIP Signaling Processing Unit is received the message that sends fax, generate the re_invite message of revising medium according to the Session Initiation Protocol standard and deliver to legal monitor centers;
After facsimile transmission finished, conversation continued, and medium conversion unit need detect fax completion according to the medium receiving element, and handled the message that sends fax completion respectively to SIP Signaling Processing Unit and medium;
The SIP signaling unit receives that fax completion message just sends the re_invite message of media modification to legal monitor centers, the notice legal monitor centers;
If fax completion, end of conversation then, the signalling system No.7 processing unit is received RELEASE (release) message of being sent by intercept target, the signalling system No.7 processing unit sends release message notice SIP Signaling Processing Unit;
The SIP Signaling Processing Unit is received the message of release, discharges the media conversion resource of application and the resource of medium receiving element, and sends release message for the signalling system No.7 processing unit.Send BYE (end) message to legal monitor centers, and call release;
After media processing units is received the signal of fax beginning, need close the function of speech processes, open the function that fax is handled;
Because monitored speech path all is unidirectional road, have only from the intercept target to the listening center, and therefore the not speech channel from the listening center to the intercept target faxes to the conversion of Fax over IP for more high efficiency realization TDM, need finish the road that connects of TDM fax up-downgoing in the TDM of media processing units side; And
Behind fax completion, if conversation continues, then medium conversion unit can send message to media processing units, and notice is closed facsimile function, and reopens phonetic function.
Processing for medium is carried out simultaneously with signaling process, but under the control of Signaling Processing Unit.
Fig. 5 is the method for media conversion is carried out the TDM media conversion in use according to the present invention to the device of IP medium a flow chart.
As shown in Figure 5, using said apparatus to carry out the TDM medium may further comprise the steps to the method for IP media conversion: step S502 sends to listening center by first module after handling from the signaling of intercept target; And step S504, after changing, send to listening center by second module from the medium of intercept target.And the execution of above step does not have sequencing.
Sent among the step S502 of listening center after handling from the signaling of intercept target by first module, may further comprise the steps: the signaling receiving element receives signalling system No.7 from intercept target, and sends to the signalling system No.7 processing unit; Receive the signalling system No.7 that sends from the signaling receiving element by the signalling system No.7 processing unit, and send response message to the SIP Signaling Processing Unit according to the signalling system No.7 that receives; And the SIP Signaling Processing Unit produces corresponding SIP signaling according to the response message that sends from the signalling system No.7 processing unit, and sends to listening center.
Sending among the step S504 of listening center after changing by second module, may further comprise the steps: receiving the TDM medium by media access unit from intercept target, and send to TDM commentaries on classics IP processing unit from the medium of intercept target; TDM changes the IP processing unit and receives the TDM medium that send from media access unit, and the TDM medium are sent to medium conversion unit; Medium conversion unit receives from TDM changes the TDM medium that the IP processing unit sends, and after the TDM media conversion was the IP medium, the IP medium are sent to TDM changeed the IP processing unit; TDM changes the IP processing unit and receives the IP medium that send from medium conversion unit, and the IP medium are sent to IP medium transmitting element; And IP medium transmitting element sends to listening center with the IP medium.
In said method, signalling system No.7 processing unit and SIP Signaling Processing Unit control TDM change the action of IP processing unit, and TDM changes the IP processing unit and carries out the forwarding of media data according to the port that signaling process provides.
Be the preferred embodiments of the present invention only below, be not limited to the present invention, for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (7)

  1. One kind with the TDM media conversion to the device of IP medium, it is characterized in that, comprising:
    First module and second module,
    Wherein, described first module comprises:
    The signaling receiving element is used to receive the signalling system No.7 from intercept target, and sends to the signalling system No.7 processing unit;
    Described signalling system No.7 processing unit is used for sending response message to the SIP Signaling Processing Unit according to the described signalling system No.7 that receives, and described signalling system No.7 processing unit docks with described intercept target, and controls described signalling system No.7 and be converted to the SIP signaling; And
    Described SIP Signaling Processing Unit is used for basis from the described response message that described signalling system No.7 processing unit sends, and carries out described SIP signaling process, explanation and transmitting-receiving,
    Described second module comprises:
    The medium receiving element is used to receive the TDM medium from described intercept target, and sends to TDM commentaries on classics IP processing unit;
    Described TDM changes the IP processing unit, is used to carry out the transmission of described TDM medium and IP medium;
    Medium conversion unit is used to carry out the conversion of described TDM medium to described IP medium; And
    IP medium transmitting element is used for described IP medium are sent to listening center.
  2. 2. device according to claim 1 is characterized in that,
    Described signalling system No.7 processing unit and described SIP Signaling Processing Unit are controlled the action that described TDM changes the IP processing unit, and the port that described TDM provides when changeing the IP processing unit according to signaling process carries out the forwarding of media data.
  3. 3. device according to claim 1 is characterized in that,
    Described medium receiving element is a TU Trunk Unit.
  4. 4. one kind is used that each described device carries out the method for TDM medium to the IP media conversion in the claim 1 to 3, it is characterized in that, may further comprise the steps:
    After handling, send to described listening center by described first module from the signaling of described intercept target; And
    After changing, send to described listening center by described second module from the medium of described intercept target.
  5. 5. method according to claim 4 is characterized in that,
    Sending in the step of described listening center after handling by described first module, may further comprise the steps from the signaling of described intercept target:
    Described signaling receiving element receives described signalling system No.7 from described intercept target, and sends to described signalling system No.7 processing unit;
    Receive the described signalling system No.7 that sends from described signaling receiving element by described signalling system No.7 processing unit, and send response message to the SIP Signaling Processing Unit according to the described signalling system No.7 that receives; And
    Described SIP Signaling Processing Unit produces corresponding SIP signaling according to the described response message that sends from described signalling system No.7 processing unit, and sends to listening center.
  6. 6. method according to claim 4 is characterized in that,
    Sending in the step of described listening center after changing by described second module, may further comprise the steps from the medium of described intercept target:
    Receive the TDM medium by described medium receiving element from described intercept target, and send to described TDM commentaries on classics IP processing unit;
    Described TDM changes the IP processing unit and receives the described TDM medium that send from described medium receiving element, and described TDM medium are sent to described medium conversion unit;
    Described medium conversion unit receives from described TDM changes the described TDM medium that the IP processing unit sends, and after described TDM media conversion was the IP medium, described IP medium are sent to described TDM changeed the IP processing unit;
    Described TDM changes the IP processing unit and receives the described IP medium that send from described medium conversion unit, and described IP medium are sent to IP medium transmitting element; And
    Described IP medium transmitting element sends to described listening center with described IP medium.
  7. 7. according to each described method in the claim 4 to 6, it is characterized in that,
    In described method, described signalling system No.7 processing unit and described SIP Signaling Processing Unit are controlled the action that described TDM changes the IP processing unit, and the port that described TDM provides when changeing the IP processing unit according to signaling process carries out the forwarding of media data.
CN2008100063429A 2008-02-26 2008-02-26 Device for converting TDM media into IP media and method for using this device Active CN101237486B (en)

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Publication number Priority date Publication date Assignee Title
CN101488954A (en) * 2009-01-09 2009-07-22 中兴通讯股份有限公司 Speech monitoring method and access gateway
CN102025715B (en) * 2010-05-17 2014-01-01 华中科技大学 SIP (Session Initiation Protocol) protocol-based multimedia network communication method
CN106101481B (en) * 2016-07-21 2019-08-20 上海携程商务有限公司 Fax receiving system and facsimile receptions method
CN110570881B (en) * 2019-08-05 2022-07-22 深圳震有科技股份有限公司 Method, apparatus, device and medium for switching back to voice mode in facsimile transparent transmission mode

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CN1498482A (en) * 2001-03-21 2004-05-19 Method and communication system for monitoring data flow in data network
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CN101043691A (en) * 2007-04-28 2007-09-26 中兴通讯股份有限公司 Legal monitor method for IMS network

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CN101043691A (en) * 2007-04-28 2007-09-26 中兴通讯股份有限公司 Legal monitor method for IMS network

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