CN1976539A - System, method and device for transmitting digital user signalling - Google Patents

Abstract

A method for transmitting digital user signaling finalizes information interaction relating to ISDN simulation between control unit used in ISDN service simulation and user adaptive node of conversation launching protocol through conversation launching protocol packaged with digital user signaling information so as to realize ISDN service simulation.

Description

A kind of system, method and apparatus that transmits digital user signalling

Technical field

The present invention relates to a kind of system and method for ISDN emulation of packet-based core networks, in particular a kind of system, method and apparatus that transmits digital user signalling.

Background technology

Integrated services digital network ISDN (Integrate Service digital Network, hereinafter to be referred as ISDN) network providing on the basis of digital telephone network, providing end to end, numeral connects, a series of professional widely to support, comprise voice service and non-speech service, provide one group of user-network interface limited, standard to the user.Insert the switching system place the user, support the standard interface of 2B+D, 30B+D, nB+D.The B channel is the Bearer Channel of 64kbit/s speed, and the D channel is the signaling channel of 16kbit/s or 64kbit/s speed.The isdn network support comprises the various integrated services of speech, data, literal, image; Also support as Call Forwarding, AOC (Advice of Charge, advice of charge), CCBS multiple supplementary services such as (Completion of Calls to Busy Subscribers meet busy the calling and finishes).In order to realize these business, ISDN TE (terminal equipment, Terminal equipment) with needing to carry out a large amount of interacting messages between the network, the reciprocal process of these message and message is defined as digital subscriber ISDN PRI (Digital subscriber signaling system No.1, hereinafter to be referred as DSS1) Digital Subscriber Signaling No.1 is divided into two layers of signaling and three layers of signaling, wherein two layers of signaling adopt LAPD " D channel link joining procedure ", mainly be that three layers of message transmit between ISDN terminal and network reliably, and three layers of signaling are for various basic for what provide the isdn user to provide, the control signaling signaling of supplementary service.

PLMN (public land mobile network) is towards a kind of network that inserts portable terminal, generally form by wireless access network and mobile switching centre, the user inserts mobile switching centre by wireless access network, and the mobile network who is generally called optical imaging comprises GSM, WCDMA, CDMA etc.

Network provides, supplementary service similarly basic with isdn network equally in PLMN, as speech business, call out business such as maintenance etc., for these business are provided, portable terminal is with the information that exists similar service request and professional control between the mobile switching centre, these information are defined as CM (Connection management, connection management) layer protocol and promptly are used to control the agreement that the network that provides support provides business in wireless network.

Because the user adopts wireless access way, these message can't directly arrive mobile switching centre, therefore these information must be responsible for the CM application layer protocol is transmitted between portable terminal is with mobile switching centre by BSS (base station system) or RNS wireless access networks such as (RNSs), as in gsm system, these message of CM layer protocol transmit by the DTAP agreement among the A interface BSSAP, in the UMTS system, the transmission of the Direct Transfer method of the RANAP by the Iu interface.

The CM application layer protocol can be divided into CC (calling out control) agreement again according to the business function difference that provides, SS (supplementary service control), SMS (simple short message) agreement etc., CC wherein, no matter the SS application protocol is all based on three layers of message of DSS1 on message format and the message content, just expansion to some extent on the individual information unit, except the characteristic service that wireless network provides, professional and the use CC that wireless network provides, the SS application layer is carried out professional flow process and also is consistent substantially with ISDN, by the CC agreement, SS agreement, network can be finished for PLMN user all kinds of basic, the control procedure of supplementary service.

At present, continuous maturation along with group technology, develop based on Circuit-switched conventional telecommunication network towards broadband telecommunication net based on packet switching, the grouping telecommunications network is prepared or set up in a lot of operations commercial city, though it is developing tendency in future that the user uses the packet communications terminal to insert the grouping telecommunications network, but operator is in the process of construction of grouping telecommunications network, also can not hope for the replacing terminal equipment that all contracted users can be unified, therefore the grouping telecommunications network of present stage must be supported the access of conventional I SDN terminal simultaneously at least, ISDN/PSTN (Public SwitchedTelephone Network, the public switched telephone network) business that the grouping telecommunications network must inheriting tradition like this.In the research of each present relevant criterion tissue, this type of business is collectively referred to as ISDN/PSTN artificial service (Emulation Service).The research of artificial service also only is confined to how to inherit in Packet Based Network aspect the PSTN business, for not tangible progress of the succession of ISDN business and concrete scheme at present.

Use Session initiation Protocol SIP (Session Initiation Protocol, hereinafter to be referred as SIP) as the grouping telecommunications core network call control signalling be one of current technology trends, as ITU-T (International Telecommunication Union-Telecommunication StandardizationSector, ITU Telecommunication Standardization Sector) and ETSI (European TelecommunicationsStandards Institute, ETSI) to NGN (Next Generation Network, next generation network) formulation of standard, therefore when ISDN terminal accesses to use SIP as the packet-based core networks of call control signalling, realize the ISDN artificial service, assurance original user business experience remains unchanged and will consider how Session Initiation Protocol transmits the relevant information that digital user signalling carries, but in the prior art, a kind of method of how complete transmission digital user signalling information is not proposed, in order to realize the ISDN artificial service, therefore can't really realize the ISDN artificial service.

Digital Subscriber Signaling No.1 comprises link layer and Network Layer Signaling, and if no special instructions, the Digital Subscriber Signaling No.1 of below mentioning refers to Network Layer Signaling, i.e. L3 (Layer3) layer signaling.And common L3 layer comprises RR (Radio Resource), MM (mobile management), CM (connection management) in the wireless network, the wireless network L3 layer signaling of hereinafter mentioning if no special instructions is meant that the cm section Digital Subscriber Signaling No.1 of wireless network L3 layer is the control signaling that ITU-T normal structure issue (Q.93X series, Q.95X serial) is applicable to the ISDN user-network interface, and same agreement exists in tissues such as ETSI equally, and concrete agreement can be consulted the standard of normal structure issues such as ITU-T and ETSI; The L3 layer defines in the 3GPP standard in the wireless network, and as 3GPP TS 24.007 etc., the agreement of equity exists in that tissues such as 3GPP2 are same, specifically can consult the standard of 3GPP, the issue of 3GPP2 linked groups.

In existing standard manuscript, provided when DSS1 and SIP intercommunication, use message, parameter mapping to transmit the method for call information in the DSS1 message.This method gives the isoparametric mapping of FROM, TO, SDP in the information unit such as calling number, called number, HLC, BC and sip message in the DSS1 message, shines upon some Digital Subscriber Signaling No.1 information of transmitting by these, can finish basic call.

But be subjected to the restriction of existing sip message, header field, existing mapping method only can transmit limited Digital Subscriber Signaling No.1 information, because the ISDN class of business is abundant, when realizing that these are professional, need signaling information element, the parameter of use numerous, use FACILITY (facility) message to carry out mutual operation definition as ISDN supplementary service user, network and reach 95 kinds, the overwhelming majority operates in and can not get mapping among the SIP, and the therefore simple SIP of use mapping method can not satisfy the requirement of supporting the ISDN artificial service; If realize the mapping of these parameters fully, then need Session Initiation Protocol is carried out a large amount of expansions, this will produce considerable influence to Session Initiation Protocol itself, and these expansions do not have versatility except that for the support of isdn user's signaling.

Be illustrated in figure 1 as the operation flow that the beginning meeting is operated under the idle condition in former isdn network of prior art, detailed description can be with reference to Q.954.1 agreement, no longer description herein; Being illustrated in figure 2 as under the Q.954.1 middle idle condition of the prior art increases by side's operation service flow process, and detailed description can be with reference to Q.954.1 agreement, no longer description herein.

Therefore, the result that present Digital Subscriber Signaling No.1 information can not be shone upon in sip message entirely is exactly, and causes business information to be lost, and can't realize level and smooth ISDN artificial service on the inheritance of business.Be prior art basic call and other ISDN supplementary service such as caller ID display when only supporting ISDN terminal to access to use SIP, can not support all ISDN supplementary services as the packet-based core networks of call control signalling.

So there is defective in prior art, and await improving and development.

Summary of the invention

The object of the present invention is to provide a kind of system and method that transmits digital user signalling, propose a kind ofly to access to when using SIP as the packet-based core networks of call control signalling in ISDN terminal, use the method for SIP transmission digital user signalling information, in order to realize the ISDN artificial service.

Technical scheme of the present invention comprises:

A kind of system that transmits digital user signalling, it comprises at least one ISDN terminal and packet-based core networks, described packet-based core networks comprise an ISDN business simulating control unit at least, wherein, be provided with Session initiation Protocol user adapter nodes between described ISDN terminal and described packet-based core networks, described ISDN terminal is connected with described ISDN business simulating control unit by described Session initiation Protocol user adapter nodes; Described ISDN business simulating control unit is used to provide ISDN service control function and Internet resources controlled function; Described Session initiation Protocol user adapter nodes adopts message maps and/or digital user signalling message is encapsulated into the mode of the message body of Session initiation Protocol, provides the signaling between digital user signalling agreement and the Session initiation Protocol adaptive.

A kind of method that transmits digital user signalling, be applied to use the packet-based core networks of Session initiation Protocol as call control signalling, it may further comprise the steps: be used between ISDN business simulating control unit and the Session initiation Protocol user adapter nodes, it is mutual that the conversation launch protocol message that use is packaged with digital user signalling information is finished the ISDN business information, ISDN business simulating control unit utilizes described ISDN business information to carry out business control, thereby realizes the business simulating of ISDN; Wherein, to be used to the Session initiation Protocol be that the packet network of core net call control signalling provides the Session initiation Protocol signaling adaption function that inserts ISDN terminal to described Session initiation Protocol user adapter nodes; The control unit of the described ISDN of being used for business simulating is used to provide the ISDN service control function.

Described method, wherein, described step specifically comprises: A, serviced user conversation initiation protocol user adapter nodes are received digital user signalling message, relevant information is encapsulated in the message body of conversation launch protocol message, mails to serviced user's ISDN business simulating control unit by conversation launch protocol message; B, the serviced user ISDN business simulating control unit initialization protocol message that accepts session carries out Business Processing, and the conversation launch protocol message that will be packaged with digital user signalling information is sent to serviced user's Session initiation Protocol user adapter nodes or far-end network; The Session initiation Protocol user adapter nodes of C, serviced user or remote subscriber is received the conversation launch protocol message from ISDN business simulating control unit, translates to digital user signalling message, sends to corresponding ISDN terminal.

Described method, wherein, described steps A also comprises: the digital user signalling message that A1, encapsulation are received, or the information unit that comprises in the encapsulation digital user signalling message.

Described method, wherein, described steps A also comprises: the binary digit subscriber signaling message that A2, parsing are received, by information unit in text mode describing message or the message, and then encapsulation textual description information.

Described method, wherein, described step C also comprises: content is binary digit subscriber signaling message or information unit in C1, the judgement message body, then extracts message body content, is assembled into digital user signalling message and sends user's ISDN terminal to.

Described method, wherein, described step C also comprises: content is the digital user signalling information of text mode in C2, the judgement message body, then resolves the digital user signalling information of text mode, is configured to binary digital user signalling message and mails to user's ISDN terminal.

Described method, wherein, described encapsulation realizes by the new media type or the existing medium type of expansion that increase the conversation launch protocol message body.

Described method, wherein, described encapsulation comprises binary mode encapsulation and text mode encapsulation, the encoding and decoding indication field in describing by medium type realizes.

Described method, wherein, described method adopts at least a packaged type; When adopt surpassing a kind of packaged type, by different medium types is set, or the different parameters of a medium type is set, realizes the differentiation of packaged type.

Described method, wherein, described digital user signalling is digital subscriber ISDN PRI network layer, wave point connection management layer.

A kind of device that transmits digital user signalling is applied to adopt insert and uses the packet-based core networks of Session initiation Protocol as call control signalling, and described device comprises: first interface is used to connect packet-based core networks; Second interface is used to connect the isdn terminal device signaling channel; The message sink unit is used to receive the first digital user signalling message or first conversation launch protocol message that described first interface and described second interface transmit; Message processing unit, be connected with the message sink unit, be used for to encapsulate from the described first digital user signalling message content of message sink unit or being mapped in second conversation launch protocol message, or be used for generating the second digital user signalling message from first conversation launch protocol message of receiving; Message sending unit is connected with message processing unit, is used for sending described second conversation launch protocol message or the second digital user signalling message from message processing unit to described first interface and described second interface.

Described device, wherein, described first interface is the conversation launch protocol message interface of encapsulation digital user signalling information, described second interface is the digital user signalling message interface.

Described device, wherein, the digital user signalling information of described first interface is meant digital user signalling message or the information unit that binary digital subscriber message or information unit or text mode are described.

Described device, wherein, described digital user signalling message interface is for transmitting subscriber signaling network layer message interface of numeral or transmitting wave point signalling connection managing floor message interface.

The invention provides a kind of system, method and apparatus that transmits digital user signalling, make and access to when using SIP as the packet-based core networks of call control signalling at ISDN, by carrying digital user signalling messages/information unit in the sip message body, complete transmission digital user signalling protocol information between ISDN terminal and ISDN business simulating control unit, thereby simply realized the ISDN artificial service, reached the purpose of in packet network, inheriting the ISDN business.

Description of drawings

Fig. 1 is for beginning the operation flow schematic diagram of meeting operation under the idle condition of prior art;

Fig. 2 is increase by one side's operation service schematic flow sheet of prior art;

Fig. 3 is the cellular logic structural representation of system of the present invention;

Fig. 4 is the schematic flow sheet that UUS1 in the ISDN artificial service of the inventive method and HOLD realize;

Fig. 5 is the realization flow schematic diagram of the beginning meeting under idle condition of the inventive method;

Fig. 6 is the operating process schematic diagram that increases by a side in meeting of the inventive method;

Fig. 7 is the WCDMA user's of the inventive method the realization flow schematic diagram of UUS business.

Embodiment

Below in conjunction with accompanying drawing, will carry out comparatively detailed explanation to each preferred embodiment of the present invention.

The present invention transmits system, the method and apparatus of digital user signalling, with Session initiation Protocol SIP as shown in Figure 3 as the cellular logic structure chart of the packet-based core networks of call control signalling, between ISDN terminal and packet-based core networks, be provided with the sip user adapter nodes, ISDN terminal is connected with ISDN business simulating control unit in the packet-based core networks by the sip user adapter nodes, this ISDN business simulating control unit is realized business control and the Internet resources control of ISDN, comprises basic service and supplementary service.Described Session initiation Protocol user adapter nodes adopts message maps and/or digital user signalling message is encapsulated into the mode of the message body of Session initiation Protocol, provides the signaling between digital user signalling agreement and the Session initiation Protocol adaptive.

Described ISDN business simulating control unit provides the logic control function of ISDN business simulating for the ISDN terminal user who inserts packet-based core networks.Described sip user adapter nodes is that the ISDN terminal access is the signaling processing entity of the packet domain of call control signalling with SIP, it has sip user adaptive (SIPUA) function, can shield the Access Layer subscriber signaling, provide the function of translating between DSS1 agreement and the Session Initiation Protocol as a protocol conversion node.

It is noted that, Figure 3 shows that the logic connection layout, in the actual physical link, between ISDN terminal and sip user adapter nodes, may have other entities.

Described ISDN business simulating control unit provides the Service Control Unit of the logic control of ISDN artificial service for the registered user who inserts packet-based core networks provides miscellaneous service logic control functions such as calling control, route continue for the ISDN terminal user.

As can be seen from Figure 3, realize the ISDN artificial service, must be between the sip user adapter nodes of ISDN business simulating control unit and ISDN terminal, transmit digital user signalling information between the former isdn user-network interface by sip message, this signaling information can be complete DSS1 the 3rd layer signaling message, as SETUP message, HOLD message, FACILITY message etc., also can be wave point signalling connection managing layer message; In addition, because prior art has been supported the mapping of information unit such as numbers of calling and called parties in the Digital Subscriber Signaling No.1 message and sip message parameter, therefore also can no longer transmit complete Digital Subscriber Signaling No.1 message, and only transmit the relevant information unit of its this business that neutralizes, as UUS (User-to-User Signalling, User-to-User Signaling) information unit, FACILITY information unit, DISPLAY information unit etc.

The method that the present invention transmits digital user signalling is between control unit that is used for the ISDN business simulating and Session initiation Protocol user adapter nodes, it is mutual that the conversation launch protocol message that use is packaged with digital user signalling information is finished the ISDN business information, ISDN business simulating control unit utilizes described ISDN business information to carry out business control, thereby realizes the business simulating of ISDN; Wherein, to be used to the Session initiation Protocol be that the packet network of core net call control signalling provides the Session initiation Protocol signaling adaption function that inserts ISDN terminal to described Session initiation Protocol user adapter nodes; The control unit of the described ISDN of being used for business simulating is used to provide ISDN service control function and Internet resources controlled function.Be example with DSS1 message below, the detailed process of the inventive method is described, comprise the steps.

At first, serviced user conversation initiation protocol user adapter nodes is received digital user signalling message, relevant information is encapsulated in the message body of conversation launch protocol message, mails to serviced user's ISDN business simulating control unit by conversation launch protocol message.After the sip user adapter nodes is received DSS1 message from ISDN terminal, select message processing unit and submit the subscriber signaling of being received to by the message sink processing unit of sip user adapter nodes, message processing unit is analyzed the digital user signalling content that receives, select suitable sip message, according to prior art with the content map that comprises in the digital user signalling in SIP header field or parameter, information unit in digital user signalling message or the digital user signalling information is encapsulated in the message body of described sip message according to this locality or collocation strategy simultaneously, send processing unit by message afterwards and send to the business simulating control unit.

For in sip message body encapsulation Digital Subscriber Signaling No.1 information, need be the new medium type (Media Type) of sip message body definition, the definition format example is as follows.

A). be used for transmitting the medium type of the 3rd layer of message of DSS1:

Media?type?name:application

Media?subtype?name:DSS1-Message

Required?parameters:Version

Optional?parameters:charset

Encoding?scheme:codeset

B). be used for transmitting the medium type of the 3rd layer of information unit of DSS1:

Media?type?name:application

Media?subtype?name:DSS1-IE

Required?parameters:Version

Optional?parameters:charset

Encoding?scheme:codeset

Wherein, the DSS1 message of parameter " version " expression different tissues issue, as ITU-T, ETSI, ANSI etc., parameter " charset " is then represented the definition character trail, is applicable to the message encapsulation of text mode, as unicode.

Parameter " codeset ", expression can adopt the mode of binary system (binary) or text (us-ascii) that DSS1 message or information unit are encapsulated for the type of coding of DSS1 message encapsulation: the encoding and decoding indication field in describing by medium type realizes.When adopting binary mode to encapsulate, binary DSS1 message of encapsulation or information unit in the sip message body; When adopting text mode to encapsulate, package implementation need be resolved binary DSS1 message or information unit, is converted into text mode, is encapsulated in the message body.

Obviously, can define the medium type of four kinds of different packaged types at most: the DSS1 information unit encapsulation of binary-coded DSS1 message encapsulation, the DSS1 message encapsulation of text code, the encapsulation of binary-coded DSS1 information unit, text code, in the practical application, choose the medium type of a kind of packaged type wherein as required.Certainly, encapsulation of the present invention realizes by the new media type or the existing medium type of expansion that increase the conversation launch protocol message body.

The inventive method adopts at least a packaged type; When the inventive method adopt to surpass a kind of packaged type, by different medium types is set, or the different parameters of a medium type is set, realize the differentiation of packaged type.In actual applications, if system requirements is supported more than one packaged type, except the medium type that can define above-mentioned packaged type, also can be defined in the identical medium type, distinguish encapsulation of binary coding encapsulation/text code and/or the encapsulation of DSS1 message encapsulation/DSS1 information unit by different parameters, combination in any defines one or more medium type as required, wherein distinguishes different packaged types by parameter.

Secondly, the serviced user ISDN business simulating control unit initialization protocol message that accepts session carries out Business Processing, and the conversation launch protocol message that will be packaged with digital user signalling information is sent to serviced user's Session initiation Protocol user adapter nodes or far-end network.After described ISDN business simulating control unit is received sip message from the sip user adapter nodes, analyze SIP and sip message body content, carry out corresponding ISDN controlling and processing services, the sip message that carries the DSS1 relevant information is sent to the sip user adapter nodes of serviced user or remote subscriber or mails to far-end network, be i.e. ISDN artificial service control unit under the remote subscriber.

Once more, the Session initiation Protocol user adapter nodes of serviced user or remote subscriber is received the conversation launch protocol message from ISDN business simulating control unit, translates to digital user signalling message, sends to corresponding ISDN terminal.Described sip user adapter nodes is received the sip message from ISDN artificial service control unit, select suitable message processing unit to submit these message to by the message sink unit of sip user adapter nodes, message processing unit is resolved received sip message, as encapsulation digital user signalling message in the sip message body, the digital user signalling message of then extracting in the sip message body sends to user terminal; As encapsulation digital user signalling information unit in the sip message body, then suitable digital user signalling message according to the sip message type selecting, with SIP header field, parameter maps be in the digital user signalling message information unit, simultaneously the digital user signalling information unit in the sip message body is appended in this digital user signalling message, mail to user terminal by message sending unit afterwards.

, just can finish Digital Subscriber Signaling No.1 at ISDN terminal mutual with between the ISDN business simulating control unit, and then realize all kinds of business of original ISDN the description of the inventive method according to above.In above-mentioned steps of the present invention, described sip user adapter nodes can be encapsulated in digital user signalling message in the sip message body, also one or more digital user signalling information units can be encapsulated in the sip message body.

The inventive method is by carrying digital user signalling message in the sip message, information unit can be realized the message of ISDN supplementary services such as MCID, CFU, CFB, CFNR, CD, ECT, HOLD, TP, CCBS, CCNR, CONF, 3PTY, AOC, UUS, CUG and the transmission of information unit, thereby realizes these business.

As shown in Figure 3, adopt the inventive method, the present invention also provides a kind of device that transmits digital user signalling, is applied to adopt insert use the packet-based core networks of Session initiation Protocol as call control signalling, described device comprises: first interface is used to connect packet-based core networks; Second interface is used to connect the isdn terminal device signaling channel; The message sink unit is used to receive the first digital user signalling message or first conversation launch protocol message that described first interface and described second interface transmit; Message processing unit, be connected with the message sink unit, be used for to encapsulate from the described first digital user signalling message content of message sink unit or being mapped in second conversation launch protocol message, or be used for generating the second digital user signalling message from first conversation launch protocol message of receiving; Message sending unit is connected with message processing unit, is used for sending described second conversation launch protocol message or the second digital user signalling message from message processing unit to described first interface and described second interface.

In the device of the present invention, described first interface is the conversation launch protocol message interface of encapsulation digital user signalling information, and described second interface is the digital user signalling message interface.The digital user signalling information of described first interface is meant digital user signalling message or the information unit that binary digital subscriber message or information unit or text mode are described.Described digital user signalling message interface is for transmitting subscriber signaling network layer message interface of numeral or transmitting wave point signalling connection managing floor message interface.

Hereinafter will provide two more common examples and describe how to carry DSS1 information, use the ISDN terminal user of SIP, ISDN will be provided artificial service as the packet-based core networks of call control signalling to accessing to by sip message.

Need to prove: the explanation that flow process diagram of being done among the present invention and explanatory note are only done for outstanding key technology of the present invention, do not represent a complete calling and professional control flow, there is not all possible branch of limit flow process yet; Wherein said digital user signalling is the signaling process of digital subscriber ISDN PRI network layer, is equally applicable to wave point connection management layer.

As shown in Figure 4, be the implementation procedure that example illustrates the inventive method that is embodied as with ISDN supplementary service UUS1 (User to User Signaling 1, signaling 1 between the user), HOLD (call out and keep), its flow process is explained as follows:

At first, isdn user's terminal sends DSS1 SETUP message to the sip user adapter nodes, calling number is 8880006 in the SETUP message, called number is 8880008, bearing capacity is SPEECH, carry UUS1 information, the 3rd layer of message content of the DSS1 of the isdn signaling path that user's adapter nodes is received is as follows, and the data message that wherein is increased in the UUS information unit of the Digital Subscriber Signaling No.1 in the imformosome embodies with underlined form:

08?01?01?05?04?03?80?90?a3?18?01?83?6c?09?41?a0?38?38?38?30?30?30?36?7008?80?38?38?38?30?30?30?38? 7E?0A?04?38?38?38?38?38?38?38?38?38?38

Secondly, described sip user adapter nodes is the SIP INVITE according to the mapping mode of prior art with the DSS1SETUP message translation, increases in message body simultaneously:

Content-type:application/DSS1-IE;version=ITU-T;Encoding?scheme=binary

7E?0A?04?38?38?38?38?38?38?38?38?38?38

Above-mentioned message body content is the binary representation of DSS1 UUS information unit;

Certainly the description that also foregoing is resolved to text mode encapsulates, for comprise " 7E 0A 04 38 38 38 38 38 38 38 38 38 38" the DSS1 information unit of content; according to the definition binary code stream 7E sign UUS information unit of DSS1 information unit structure; 0A identification information element length; 04 identity protocol is differentiated language; all the other contents are the UUS data message, it is as follows to be converted into the information description of text mode by this parsing.

Content-type:application/DSS1-IE;version=ITU-T;Encoding?scheme=us-ascii

UUS,pd=Of,dat=38?38?38?38?38?38?38?38?38?38

UUS identification information unit title wherein, pd is that described agreement is differentiated language, dat is described UUS data message.

Above-mentioned underlined part is exactly the UUS information unit that is increased in the Digital Subscriber Signaling No.1 in the imformosome.

Message examples is as follows:

INVITE?sip:8880008@ag2.example.com?SIP/2.0

Via:SIP/2.0/UDP?acess.example.com

From:sip:8880006@ag1.example.com

To:sip:8880008@ag2.example.com

Call-ID:12345678908888888888@example.com

CSeq:1234INVITE

Contact:<sip:8880006@example.com>

Content-Length:385

MIME-Version:1.0

Content-Type:application/SDP;charset=ISO-10646

v=0

o=audet?2890844526?2890842807?5?IN?IP4?132.172.62.2

s=SDP?example

c=IN?IP4?access.example.com

t=2873397496?2873404696

m=audio?RTP/AVT?8

a=-

b=64kbit/s

Content-type:application/DSS1-IE;version=ITU-T;Encoding?scheme=binary

7E?0A?04?38?38?38?38?38?38?38?38?38?38

Once more, described ISDN business simulating control unit is received sip message, analyze message and message body internal information, judge according to user contracting data whether the user has the service authority of UUS1, because of the UUS information unit is end-to-end transmission information, with the sip user adapter nodes of the transparent called subscriber of being sent to of this message (being the remote subscriber B of serviced user A) ownership, there is not professional authority as the user, ISDN business simulating control unit will be deleted the above-mentioned UUS information of encapsulation in the message body.

Then, purpose sip user adapter nodes, analyze message content, the SIP INVITE is translated to DSS1 SETUP message, identification sip message body content purpose sip user adapter nodes, analyze message content, according to existing method INVITE is mapped as the SETUP message of DSS1, identification sip message body beared information DSS1 information unit is with it extraction and be appended in the SETUP message, issue ISDN terminal B, realize the UUS1 business.

Afterwards, send DSS1 CONNECT message, call establishment by called ISDN terminal; Called sip user adapter nodes uses DSS1 CONNECT ACKNOWLEDGE message to respond.Called sip user adapter nodes sends to ISDN business simulating control unit with DSS1 CONNECT message translation for SIP 200OK; ISDN business simulating control unit sends SIP ACK SIP 200OK message; ISDN business simulating control unit sends SIP 200OK to caller sip user adapter nodes, and the expression session is set up; Caller sip user adapter nodes uses SIP ACK message to confirm; Caller sip user adapter nodes translates to DSS1 CONNECT message with SIP 200OK, inserts processing node by the user and sends to the caller ISDN terminal; The caller ISDN terminal is used DSS1 CONNECT ACKNOWLEDGE message response according to the Digital Subscriber Signaling No.1 flow process, and session this moment is set up, and sees also the 5-11 step among Fig. 4.

Below the caller ISDN terminal A of the inventive method sent DSS1 HOLD message request keep call business to describe; DSS1 message content wherein is exemplified as:

08?01?01?24

Owing to there is not corresponding mapping mode in the prior art, the sip user adapter nodes is used SIP INFO encapsulation DSS1 HOLD message, send to corresponding ISDN business simulating control unit, in the INFO body, increase the contents are as follows shown in, be complete DSS1 HOLD message:

Content-type:application/DSS1-Message;version=ITU-T;Encodingscheme=binary

08?01?01?24

Described ISDN business simulating control unit, analyze sip message and message body content, be judged as caller request ISDN HOLD business, according to the professional regular traffic carrying of ISDN HOLD DSS1 information, be judged as caller request HOLD business,, return HOLD ACKNOWLEDGE message according to the professional normal flow of ISDN HOLD, HOLD ACKNOWLEDGE message is encapsulated in the message body of SIP200OK message, increases following content in the message body:

Content-type:application/DSS1-Message;version=ITU-T;Encodingscheme=binary

08?01?81?28

Described sip user adapter nodes is according to content in the SIP 200OK message body, and DSS1 HOLD ACKNOWLEDGE message is given calling terminal in the transparent transmission message body, thes contents are as follows:

08?01?81?28

Described ISDN business simulating control unit, according to the HOLD business need send carry DSS1Notify message the SIP INFO to called sip user adapter nodes so that be held, increase in the INFO and the contents are as follows to called indicating call:

Content-type:application/DSS1-Message;version=ITU-T;Encodingscheme=binary

08?01?01?6E?27?01?79

When adopting text mode to carry out information description, message body content is as follows:

Above-mentioned " 6E " describes for the DSS1 NOTIFY, and " 27 " are that DSS1 NOTIFY information unit is described, and " 01 " is message-length, and " 79 " describe language for notice, and the expression far-end is called out and kept, and through behind the message parse, determines that sip message body content is:

Content-type:application/DSS1-Message;version=ITU-T;Encodingscheme=us-ascii

NOTIFY

NI,nd=79

NOTIFY identification message name wherein, NI identification information unit notify indicator, nd represent that the notice characterising parameter is 79 (remote hold) in the information unit

After described sip user adapter nodes is received sip message, extract sip message body packaging information, be configured to DSS1 NOTIFY (indicating call is held) and send to ISDN terminal, message content is as follows:

08?01?01?6E?27?01?79

The sip user adapter nodes uses 200OK message to confirm according to protocol requirement; The control of ISDN business simulating information unit is carried out playback operation to serviced user, by sending the SIP INVITE to called sip user adapter nodes, carries SDP and describes the realization of media resource address.

Described called sip user adapter nodes is according to the Session Initiation Protocol requirement, uses 200OK message response INVITE, and the speech path stream of ISDN terminal B is redirected to media resource, makes called tin of call hold tone, and call out and be held this moment, finishes the HOLD business.

From the last example of the inventive method as can be seen, UUS1 HOLD business and the business intercommunication of ISDN have been realized by SIP carrying Digital Subscriber Signaling No.1 information, it is mutual wherein can to adopt existing mapping mode that message is shone upon the back, the message that does not have existing mapping mode is potted directly in the different message bodies transmits.

Below will contrast the realization of conference telephone in the former isdn network (CONF) professional " beginning meeting " and " meeting increases by a side " operation, the use SIP that provides the inventive method describes as realization flow professional in the packet-based core networks of call control signalling, wherein Fig. 5, Fig. 6 be the inventive method realize description at SIP in as the packet-based core networks of call control signalling.

As shown in Figure 5, for using the inventive method in using the packet-based core networks of SIP as call control signalling, ISDN terminal begins the realization flow of meeting under idle condition, and wherein flow process comprises:

At first, serviced user's ISDN terminal A sends the DSS1 SETUP message that has beginning meeting composition according to Q.954.1 (1.5.2.1 requirement), and request begins meeting under idle condition, and message content is as follows:

08?01?01?05?04?03?80?90?a3?18?01?83? 1c?0c?91?a1?09?02?01?68?02?01?28?02 01?03?6c?09?41?a0?38?38?38?30?30?30?36

Secondly, the sip user adapter nodes uses DSS1CALL PROCEEDING message to respond; The sip user adapter nodes is analyzed the DSS1 message content, uses SIP INVITE encapsulation DSS1SETUP message, mails to ISDN business simulating control unit, and message examples is as follows:

INVITE?sip:CONF@ag1.example.com?SIP/2.0

Via:SIP/2.0/UDP?acess.example.com

From:sip:8880006@ag1.example.com

To:sip:CONF@ag1.example.com

Call-ID:confl2345678908888888888@example.com

CSeq:1234?INVITE

Contact:<sip:8880006@example.com>

Content-Length:462

MIME-Version:1.0

Content-Type:application/SDP;charset=ISO-10646

v=0

o=audit?28908445262890842807?5?IN?IP4?132.172.62.2

s=SDP?example

c=IN?IP4?access.example.com

t=2873397496?2873404696

m=audio?RTP/AVT?8

a=-

b=64kbit/s

Content-type:application/DSS1-Message?version=ITU-T;Encodingscheme=binary

08?01?01?05?04?03?80?90?a3?18?01?83? 1c?0c?91?a1?09?02?01?68 02?01?28?02?01?03?6c?09?41?a0?38?38?38?30?30?30?36

Described ISDN business simulating control unit is according to " beginning meeting " service logic, in SIP 200OK message, carries and has the DSS1CONNECT message that " beginning meeting " Returns Result component, and increases following content in SIP 200OK message:

Content-type:application/DSS1-Message?version=ITU-T;Encodingscheme=binary

08?01?81?07?1c?10?91?a2?0c?02?01?60?30?08?02?01?28?30?03?02?01?01

Described sip user adapter nodes uses SIP ACK to confirm; The sip user adapter nodes is according to content in the SIP 200OK message body, and DSS1 CONNECT message is given the caller ISDN terminal in the transparent transmission message body, thes contents are as follows:

08?01?81?07?1c?10?91?a2?0c?02?01?60?30?08?02?01?28?30?03?02?01?01

Described caller ISDN terminal uses DSS1 CONNECT ACK message to respond.

Figure 5 shows that and use the inventive method in using the packet-based core networks of SIP as call control signalling, ISDN terminal begins the realization flow of meeting under idle condition, and wherein, serviced user, remote subscriber are ISDN terminal among Fig. 5.

The operating process that increases by a side in the inventive method in meeting comprises as shown in Figure 6:

ISDN terminal (serviced user) sends DSS1 HOLD message, and call reference in the message (CR) uses CR for the beginning meeting; The sip user adapter nodes is used the HOLD message of SIP INFO carrying Digital Subscriber Signaling No.1, and the SIP INFO uses the dialogue number of beginning meeting operation, increases following content in the SIPINFO message body:

Content-type:application/DSS1-Message;version=ITU-T;Encodingscheme=binary

08?01?01?24

Described ISDN business simulating is resolved SIP INFO body content, be judged as ISDN HOLD business, with medium control resource mutual resource, revise serviced user media stream and be unidirectional (as the beginning meeting time set up the two-way connection of serviced user) to the media resource Media Stream, in SIP 200OK message, encapsulate the HOLD ACK message of Digital Subscriber Signaling No.1 simultaneously, increase following content in the SIP 200OK message body:

Content-type:application/DSS1-Message;version=ITU-T;Encodingscheme=binary

08?01?81?28

Described sip user adapter nodes, what encapsulate in the parsing SIP 200OK message is DSS1 message, the DSS1 HOLD ACK message of extracting in the message body is also issued ISDN terminal; Be to set up serviced user with the new session of remote subscriber by existing intercommunication flow process in 5 to 17 steps as shown in Figure 4, existing procedure is not describing in detail herein.

Below describe to see also 18-44 step shown in Figure 6: described ISDN terminal (serviced user) sends DSS1HOLD message, and call reference in the message (CR) is to call out the call reference that uses with remote subscriber; Described sip user adapter nodes is used HOLD message in the SIP INFO carrying Digital Subscriber Signaling No.1, and SIP INFO body increases following content:

Content-type:application/DSS1-Message;version=ITU-T;Encodingscheme=binary

08?01?02?24

It is ISDN HOLD service request that described ISDN business simulating control unit is resolved SIP INFO body content, use DSS1 HOLD ACK message response by the operation flow requirement, this message is encapsulated in SIP INFO content, press the HOLD business need and use HOLD ACK message response, this message is encapsulated in and mails to the sip user adapter nodes in the 200OK message, increases following content in the message body:

Content-type:application/DSS1-Message;version=ITU-T;Encodingscheme=binary

08?01?82?28

What encapsulate in the described sip user adapter nodes judgement SIP 200OK message is DSS1 message, extracts message body content and also issues ISDN terminal; ISDN business simulating control unit is handled HOLD business intercommunication logic, and the SIP INFO that sends carrying DSS1 Notify message is to far-end sip user adapter nodes.Described far-end sip user adapter nodes uses SIP 200OK message to respond.

DSS1 Notify message mails to remote subscriber in the described far-end sip user adapter nodes extraction SIP INFO body, and serviced user sends DSS1 FACILITY message, application " meeting increases by a side " operation, and the DSS1 message content:

08?01?02?1c?91?a1?09?02?01?68?07?01?29?02?01?01

Described sip user adapter nodes uses the SIP INFO to encapsulate this DSS1 message, issues ISDN business simulating Control Node, increases following content in the INFO:

Content-type:application/DSS1-Message;version=ITU-T;Encodingscheme=binary

08?01?02?1c?91?a1?09?02?01?68?07?01?29?02?01?01

Described ISDN business simulating node returns DSS1DISCONNECT message by the requirement of conference telephone service flow process, and band increase by one side Returns Result component in the DISCONNECT message, and this message is encapsulated in the SIP 200OK message and sends, and increases following content in the message:

Content-type:application/DSS1-Message;version=ITU-T;Encodingscheme=binary

08?01?82?08?03?12?9e?ff

Described sip user adapter nodes is extracted the DISCONNECT message in the SIP 200OK message body, issues serviced user, and message content is as follows:

08?01?82?08?03?12?9e?ff

Described serviced user sends DSS1 RELEASE message and discharges this local call cr2; The sip user adapter nodes is used DSS1 RELEASE COMPLETE message response.

Described ISDN business simulating control unit is handled " conference telephone increases by a side " operation service logic, and the SIP INFO that sends carrying DSS1 Notify message is to far-end sip user adapter nodes, and the indication meeting is set up, and increases in the INFO to the contents are as follows:

Content-type:application/DSS1-Message;version=ITU-T;Encodingscheme=binary

08?01?01?6E?27?01?42

Described sip user adapter nodes uses SIP 200OK message to confirm; The sip user adapter nodes is extracted the interior DSS1 message of SIP INFO body and is issued remote subscriber.

Described ISDN business simulating control unit sends SIP Update message modification medium and flows to media resource, and ISDN business simulating control unit carries out alternately with the media resource control unit; Described sip user adapter nodes uses SIP 200OK message to confirm.ISDN terminal (serviced user) sends DSS1 RETRIEVE message and replys the maintenance calling, and call reference in the message (CR) is to call out the call reference that uses with remote subscriber, and message content is as follows:

08?01?02?24

Sip user adapter nodes of the present invention is used SIP INFO encapsulation DSS1 RETRIEVE message, INFO uses the INFO that uses with the newly-increased square session of meeting to encapsulate this RETRIEVE message, INFO uses with remote subscriber session dialogue number, increases following content in the message body:

Content-type:application/DSS1-Message;version=ITU-T;Encodingscheme=binary

08?01?02?31

Described ISDN business simulating control unit is resolved SIP INFO beared information, use DSS1 RETRIEVE ACK message response by the call hold service requirement, this message is encapsulated in and mails to the sip user adapter nodes in the SIP 200OK message: increase following content in the SIP 200OK message body:

Content-type:application/DSS1-Message;version=ITU-T;Encodingscheme=binary

08?01?82?33

What encapsulate in the described sip user adapter nodes judgement SIP 200OK message is DSS1 message, extracts message and also issues ISDN terminal; Described ISDN business simulating control unit, analyze DSS1RETRIEVE message, be judged as the meeting initiator and return to Conference Calling, press CONF business intercommunication logic, the SIP INFO that sends carrying DSS1 Notify message is to far-end sip user adapter nodes, and indication has its other party to add.

Described sip user adapter nodes uses SIP 200OK message to confirm; Described sip user adapter nodes is extracted DSS1 message in the SIP INFO body, and the DSS1 NOTIFY is dealt into remote subscriber.Described ISDN business simulating control unit sends SIP Update message to the sip user adapter nodes, revises serviced user media and flows to media resource; Described sip user adapter nodes uses SIP 200OK message to confirm.

The acceding party's of follow-up meeting adding can identical flow process be finished, and no longer describes at this, and compared with prior art, the inventive method can shield the perception of user to network discrepancy, complete realization business information mutual, thus realize the ISDN artificial service.

As shown in Figure 7; be to use supplementary service UUS (User to UserSignaling with WCDMA user; signaling between the user) be embodied as example illustrate the inventive method for PLMN business realizing process; WCDMA user inserts the sip user adapter nodes by RNS (RNS); because RNS adopts the method for transparent transmission for CC layer message; therefore omitted terminal among the figure by the process of RNS to the sip user adapter nodes; the substitute is message and directly send to the sip user adapter nodes from user terminal; the flow process prerequisite; the user has finished access procedure; detailed process in protection range of the present invention, does not repeat no more.Its flow process is explained as follows:

At first, user terminal sends CC layer SETUP message to the sip user adapter nodes, called number is 8880000 in the SETUP message, bearing capacity is SPEECH, carry UUS information, the wireless CC layer message content that user's adapter nodes is received is as follows, and the data message that wherein is increased in the UUS information unit of the Digital Subscriber Signaling No.1 in the imformosome embodies with underlined form:

03?01?05?04?04?a0?5E?05?A1?88?88?00?08? 7E?0A?04?38?38?38?38?38?38?38?38 38?38

Secondly, described sip user adapter nodes is the SIP INVITE according to the mapping mode of prior art with CC layer SETUP message translation, increases in message body simultaneously:

Content-type:application/DSS1-IE;version=ITU-T;Encoding?scheme=binary

7E?0A?04?38?38?38?38?38?38?38?38?38?38

Above-mentioned message body content is the binary representation of DSS1UUS information unit;

Certainly the description that also foregoing is resolved to text mode encapsulates, for comprise " 7E0A 04 38 38 38 38 38 38 38 38 38 38" the DSS1 information unit of content; according to the definition binary code stream 7E sign UUS information unit of CC layer information unit structure; 0A identification information element length; 04 identity protocol is differentiated language; all the other contents are the UUS data message, it is as follows to be converted into the information description of text mode by this parsing.

Content-type:application/DSS1-IE;version=ITU-T;Encoding?scheme=us-ascii

UUS,pd=Of,dat=38?38?38?38?38?38?38?38?38?38

UUS identification information unit title wherein, pd is that described agreement is differentiated language, dat is described UUS data message.

Above-mentioned underlined part is exactly the UUS information unit that is increased in the CC layer signaling in the imformosome.

Message examples is as follows:

INVITE?sip:8880008@RNS.example.com?SIP/2.0

Via:SIP/2.0/UDP?acess.example.com

From:sip:8880006@ag1.example.com

To:sip:8880008@RNS.example.com

Call-ID:12345678908888888888@example.com

CSeq:1234INVITE

Contact:<sip:8880006@example.com>

Content-Length:385

MIME-Version:1.0

Content-Type:application/SDP;charset=ISO-10646

v=0

o=audet?2890844526?2890842807?5?IN?IP4?132.172.62.2

s=SDP?example

c=IN?IP4?access.example.com

t=2873397496?2873404696

m=audio?RTP/AVT?8

a=-

b=12kbit/s

Content-type:application/DSS1-IE;version=ITU-T;Encoding?scheme=binary

7E?0A?04?38?38?38?38?38?38?38?38?38?38

Once more, described business simulating control unit is received sip message, analyze message and message body internal information, judge according to user contracting data whether the user has the service authority of UUS, because of the UUS information unit is end-to-end transmission information, with the sip user adapter nodes of the transparent called subscriber of being sent to of this message (being the remote subscriber B of serviced user A) ownership, there is not professional authority as the user, the business simulating control unit will be deleted the above-mentioned UUS information of encapsulation in the message body.

Then, purpose sip user adapter nodes, analyze message content, the SIP INVITE is translated to wireless CC layer SETUP message, identification sip message body content purpose sip user adapter nodes, analyze message content, according to existing method INVITE is mapped as the SETUP message of wireless CC layer, the wireless CC layer of identification sip message body beared information information unit is with it extraction and be appended in the SETUP message, issue user terminal B, realize the UUS business.

In addition, need to prove, in mobile radio communication, the L2 (Layer2) of the Um Interface of the portable terminal of traditional circuit domain (MobileStation) access network layer and L3 layer (network layer) are to the graft application of User Network Interface in the isdn network (UNI) in mobile radio communication, the L2 data link layer of Um Interface is based on the change to the D channel link access protocol of ISDN, the supplementary service that provides in CM in the L3 layer (connection management) sublayer also is based on various ISDN supplementary services, the CM sublayer is delivered to MSC (mobile switching centre) by wireless access network and stops, if insert packet-based core networks by adaptive with wireless access network this moment, obviously CM sublayer information can be packaged into sip message, it is the system and method for aforesaid transmission digital user signalling, be equally applicable to the portable terminal of traditional circuit domain is accessed to the packet-based core networks of use SIP as call control signalling, by complete CM unit or the portion C M unit of encapsulation in the sip message body, be that portable terminal provides basic service to reach by packet-based core networks, purposes such as supplementary service.Further,, can in the sip message body, encapsulate complete Call Control Unit/supplementary service unit, also can encapsulate the partial content in Call Control Unit/supplementary service unit because the CM sublayer comprises Call Control Unit, supplementary service unit etc. again.

Therefore, the ISDN terminal described in the present invention comprises the portable terminal of traditional circuit domain; Described ISDN business comprises basic service, supplementary service of the portable terminal of traditional circuit domain etc.; Described digital user signalling comprises that the digital subscriber ISDN PRI also comprises the CM sublayer signaling of wave point.

The system and method for transmission digital user signalling of the present invention makes and accesses to when using SIP as the packet-based core networks of call control signalling in ISDN terminal, by in the sip message body, carrying complete digital user signalling L3 layer message or the partial information unit in the L3 message, between ISDN terminal and ISDN business simulating control unit, transmit digital user signalling L3 layer protocol information, thereby realized the ISDN artificial service, reached the purpose of in packet network, inheriting the ISDN business.

Wherein, can use the same medium type of sip message body to describe digital user signalling L3 layer information fixing and that move, also can use the different media types of sip message body to describe digital user signalling L3 layer information fixing and that move.

Should be understood that above-mentioned description at specific embodiment is comparatively concrete, can not therefore be interpreted as the restriction to scope of patent protection of the present invention, scope of patent protection of the present invention should be as the criterion with claims.

Claims (15)

1, a kind of system that transmits digital user signalling, it comprises at least one ISDN terminal and packet-based core networks, described packet-based core networks comprise an ISDN business simulating control unit at least, it is characterized in that,

Be provided with Session initiation Protocol user adapter nodes between described ISDN terminal and described packet-based core networks, described ISDN terminal is connected with described ISDN business simulating control unit by described Session initiation Protocol user adapter nodes;

Described ISDN business simulating control unit is used to provide ISDN service control function and Internet resources controlled function;

Described Session initiation Protocol user adapter nodes adopts message maps and/or digital user signalling message is encapsulated into the mode of the message body of Session initiation Protocol, provides the signaling between digital user signalling agreement and the Session initiation Protocol adaptive.

2, a kind of method that transmits digital user signalling is applied to use the packet-based core networks of Session initiation Protocol as call control signalling, and it may further comprise the steps:

Between control unit that is used for the ISDN business simulating and Session initiation Protocol user adapter nodes, it is mutual that the conversation launch protocol message that use is packaged with digital user signalling information is finished the ISDN business information, ISDN business simulating control unit utilizes described ISDN business information to carry out business control, thereby realizes the business simulating of ISDN;

Wherein, to be used to the Session initiation Protocol be that the packet network of core net call control signalling provides the Session initiation Protocol signaling adaption function that inserts ISDN terminal to described Session initiation Protocol user adapter nodes; The control unit of the described ISDN of being used for business simulating is used to provide the ISDN service control function.

3, method according to claim 2 is characterized in that, described step specifically comprises:

A, serviced user conversation initiation protocol user adapter nodes are received digital user signalling message, relevant information are encapsulated in the message body of conversation launch protocol message, mail to serviced user's ISDN business simulating control unit by conversation launch protocol message;

B, the serviced user ISDN business simulating control unit initialization protocol message that accepts session carries out Business Processing, and the conversation launch protocol message that will be packaged with digital user signalling information is sent to serviced user's Session initiation Protocol user adapter nodes or far-end network;

The Session initiation Protocol user adapter nodes of C, serviced user or remote subscriber is received the conversation launch protocol message from ISDN business simulating control unit, translates to digital user signalling message, sends to corresponding ISDN terminal.

4, method according to claim 3 is characterized in that, described steps A also comprises:

The digital user signalling message that A1, encapsulation are received, or the information unit that comprises in the encapsulation digital user signalling message.

5, method according to claim 3 is characterized in that, described steps A also comprises:

The binary digit subscriber signaling message that A2, parsing are received, by information unit in text mode describing message or the message, and then encapsulation textual description information.

6, method according to claim 3 is characterized in that, described step C also comprises:

Content is binary digit subscriber signaling message or information unit in C1, the judgement message body, then extracts message body content, is assembled into digital user signalling message and sends user's ISDN terminal to.

7, method according to claim 3 is characterized in that, described step C also comprises:

Content is the digital user signalling information of text mode in C2, the judgement message body, then resolves the digital user signalling information of text mode, is configured to binary digital user signalling message and mails to user's ISDN terminal.

According to each described method of claim 3 to 7, it is characterized in that 8, described encapsulation realizes by the new media type or the existing medium type of expansion that increase the conversation launch protocol message body.

9, method according to claim 8 is characterized in that, described encapsulation comprises binary mode encapsulation and text mode encapsulation, and the encoding and decoding indication field in describing by medium type realizes.

10, method according to claim 9 is characterized in that, described method adopts at least a packaged type; When adopt surpassing a kind of packaged type, by different medium types is set, or the different parameters of a medium type is set, realizes the differentiation of packaged type.

11, method according to claim 2 is characterized in that, described digital user signalling is digital subscriber ISDN PRI network layer, wave point connection management layer.

12, a kind of device that transmits digital user signalling is applied to adopt insert and uses the packet-based core networks of Session initiation Protocol as call control signalling, and described device comprises:

First interface is used to connect packet-based core networks;

Second interface is used to connect the isdn terminal device signaling channel;

The message sink unit is used to receive the first digital user signalling message or first conversation launch protocol message that described first interface and described second interface transmit;

Message processing unit, be connected with the message sink unit, be used for to encapsulate from the described first digital user signalling message content of message sink unit or being mapped in second conversation launch protocol message, or be used for generating the second digital user signalling message from first conversation launch protocol message of receiving;

Message sending unit is connected with message processing unit, is used for sending described second conversation launch protocol message or the second digital user signalling message from message processing unit to described first interface and described second interface.

13, device according to claim 12 is characterized in that, described first interface is the conversation launch protocol message interface of encapsulation digital user signalling information, and described second interface is the digital user signalling message interface.

14, device according to claim 12 is characterized in that, the digital user signalling information of described first interface is meant digital user signalling message or the information unit that binary digital subscriber message or information unit or text mode are described.

15, device according to claim 12 is characterized in that, described digital user signalling message interface is for transmitting subscriber signaling network layer message interface of numeral or transmitting wave point signalling connection managing floor message interface.

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