CN100403815C - Method and system for realizing circuit type data business call - Google Patents
Method and system for realizing circuit type data business call Download PDFInfo
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- CN100403815C CN100403815C CNB2005101262002A CN200510126200A CN100403815C CN 100403815 C CN100403815 C CN 100403815C CN B2005101262002 A CNB2005101262002 A CN B2005101262002A CN 200510126200 A CN200510126200 A CN 200510126200A CN 100403815 C CN100403815 C CN 100403815C
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Abstract
The present invention discloses a method for realizing circuit type data service call, which is used in IP core nets and IP code division multiple access systems. The method comprises that an initial terminal can send circuit type data services call requests to a mobile conversion center; the mobile conversion center can request to activate network mutual communication function resources and coding and decoding resources via a media gateway according to the circuit type data service call requests; the mobile conversion center can be connected with a receiving terminal so the initial terminal and the receiving terminal can carry out the circuit type data services. According to the present invention, TC resources and the media gateway are uniformly managed without a base station controller being assembled with a TC, and therefore, the present invention saves systemic resources.
Description
Technical field
The present invention relates to a kind of communication technology, relate in particular to a kind of in IPization core net and the code division multiple access system of IPization in realize the method and system of circuit type data business call.
Background technology
In CDMA (code division multiple access) system, stipulated a kind of circuit type data service, also be IWF (interworking between network function) business.This professional the permission by Mobile Origination G3 (three classes) facsimile service and asynchronous data traffic.Because the particularity of air interface, circuit type data service causes deficiencies such as delay, error code easily, for fear of this deficiency, the air interface transmission be fax or asynchronous data before unmodulated, in BSC (base station controller) or MSC (mobile switching centre), connect the equipment of an IWF then, be used for finishing the modulated process of fax or asynchronous data.
In the prior art, connect in the situation of IWF at the cdma system MSC of circuit domain, need to rely on the TC (transcoder) of BSC one side according to ISLP agreement (link protocol between system), finish that the IWF business is converted to the 64K circuit data, IWF is carrying out modulated process again with these data back conversion backs then.Introduce the flow process of the IWF service call of prior art below.
Below in conjunction with Fig. 1 call business flow process of the prior art is described.In this flow process, with between MSC (mobile switching centre) and the PSTN (public switched telephone network (PSTN)) to use ISUP to be example.
Step 101, MS (travelling carriage) initiate to begin to call for to ask (CM Service Request), in this process, MS at first sends the beginning call request to BSC, after BSC selects A mouth circuit, then this beginning is called for to ask and send to MSC, the described beginning is called for and asks message to have parameter S O, and this calling of this parameter indicating is a kind of IWF business.
Step 102, MSC are according to configuration, select the circuit of BSC selection or select an A mouth circuit in addition, send interpolation (Add) command messages to MGW, have BC (bearing capacity), SO parameter in this message, described BC, SO parameter are used to refer to this time calling and are the IWF service call, thereby make MGW (media gateway) insert the IWF resource for corresponding T end points.
Step 103, MGW are this call distribution C (context), are this circuit distribution T end points, insert the IWF resource, return to MSC then and add response (Add Rsp) message.
Step 104, MSC initiate assignment request (ASSIGN) to BSC, are this IWF traffic assignments land circuit and airlink.
Step 105, after BSC distributes land circuit and airlink, send to MSC and to have assigned (ASSIGN CMP) message.
After step 106, MSC select outgoing circuit, issue interpolation (Add) order, require MGW that outgoing circuit is joined among the corresponding C to MGW.
Step 107, MGW are that outgoing circuit distributes corresponding T (T2), and T2 is joined among the C, send to MSC then and add response (Add Rsp) message.
Step 108, MSC issue change (Mod) command messages for the IWF of MGW, so that activate IWF.
Step 109, MGW carry out the Mod order, thereby activate IWF, and this moment, IWF can begin to carry out with MS the process of foundation fax passages such as ppp negotiation, returned change response (Mod Rsp) to MSC then.
Step 110, MSC send initial address message (IAM) to PSTN, so that be established to the circuit of PSTN.
Step 111, PSTN switch find corresponding facsimile machine and ring (RING) according to the called number in the IAM message.
Step 112, PSTN switch send Address Complete Message (ACM) to MSC, represent called ring.
Step 113, facsimile machine are replied (ANSWER) this time calling to the PSTN switch.
After step 114, PSTN switch are received the answer signal of facsimile machine, send response message (ANM) to MSCe, the expression facsimile machine is replied, and MSC is connected on the IWF resource between PSTN circuit and the A mouth circuit.
Begin facsimile posting between step 115, caller MS and the called facsimile machine.
Therefore, in above-mentioned prior art, MSC connects under the situation of IWF, BSC needs TC to carry out the data encoding and decoding conversion, after the A of cdma system interface and IP core networkization, if still require to support this function, then not only need BSC to support TDM (time division multiplexing) and IP simultaneously, and BSC also needs to keep the codec that the IWF data is converted to the ISLP data, make that the BSC system can't simplify after the IPization, and influence the TrFO/RTO business such as (encode/decode-free operation/far-end code conversion are operated) after the IPization.
Therefore, need a kind of new method, can be supported in after MSCe meets IWF under the soft-exchange construction, BSC does not need to use TC and the flow process that realizes the IWF business.
Summary of the invention
Target of the present invention provides a kind of method and system of the IWF of realization service call, does not need in the code division multiple access system of the core net of IPization and IPization that configuration TC resource just can realize the IWF business among the BSC.
The invention provides a kind of method that realizes circuit type data business call, comprising:
A, mobile switching centre receive the circuit type data business call request that origination terminal sends;
B, mobile switching centre carry out the codec of interworking between network performance data to link protocol data transaction between system according to the circuit type data business call request by the media gateway application, and IWF resource and encoding and decoding resource between activation network;
C, mobile switching centre and receiving terminal connect, so that origination terminal and receiving terminal carry out circuit type data service.
Described origination terminal and receiving terminal comprise respectively: travelling carriage and fixed station.
When origination terminal was travelling carriage, described steps A further comprised:
A1, origination terminal are issued mobile switching centre by base station controller with the circuit type data business call request.
When origination terminal was fixed station, described steps A further comprised:
A2, origination terminal are issued mobile switching centre by public switched telephone network (PSTN) with the circuit type data business call request.
Before carrying out described step B, described method also comprises step: mobile switching centre obtains not pass through the sign of interworking between network function service to link protocol data transaction between system, and preparation method is as follows:
When origination terminal was travelling carriage, described mobile switching centre obtained not pass through the sign of interworking between network function service to link protocol data transaction system from the circuit type data business call request;
When receiving terminal was travelling carriage, described mobile switching centre obtained not pass through the sign of interworking between network function service to link protocol data transaction system from the page response that base station controller returns.
When origination terminal was travelling carriage, described step B further comprised:
B1, mobile switching centre send to media gateway and add order, so that media gateway distributing user datagram protocol port numbers and address, and distribution and the corresponding end points of User Datagram Protoco (UDP) port numbers and address;
B2, mobile switching centre send the assignment request to base station controller, so that the User Datagram Protoco (UDP) port of base station controller assignment interworking between network function service and address, airlink;
B3, mobile switching centre inter-communication function business between media gateway transmission change order is with activation network.
When receiving terminal was travelling carriage, described step B further comprised:
B1, mobile switching centre are to the Mobile Origination paging;
B2, mobile switching centre send to media gateway and add order, so that media gateway distributing user datagram protocol port numbers and address, and distribution and the corresponding end points of User Datagram Protoco (UDP) port numbers and address;
B3, mobile switching centre send the assignment request to base station controller, so that the User Datagram Protoco (UDP) port of base station controller assignment interworking between network function service and address, airlink;
B4, mobile switching centre inter-communication function business between media gateway transmission change order is with activation network.
Described step B1 further comprises:
B11, mobile switching centre send to media gateway and add order, so that media gateway is distributed the context of Calling Side end points and calling;
B12, mobile switching centre are to the Mobile Origination paging.
The present invention also provides a kind of system that realizes circuit type data business call, comprising:
Origination terminal is used for the transtation mission circuit type data service request to mobile switching centre;
Mobile switching centre, be used for controlling the media gateway application and carry out the codec of interworking between network performance data to link protocol data transaction between system according to the circuit type data service request, and IWF resource between activation network, and control base station controller assigned user datagram protocol port numbers and address, airlink;
Base station controller is used for assigned user datagram protocol port numbers and address, airlink under the control of mobile switching centre;
Media gateway is used to apply for carrying out the codec of interworking between network performance data to link protocol data transaction between system, and overhead code converter resource, interworking between network functional resources;
Receiving terminal is used to receive interworking between network function service data.
Therefore, according to the present invention, by expansion bearer update request message, making does not have TC in BSC, need just can not realize the IWF business, thereby save system resource under the situation of support to the detection of circuit type data service on the TDM time slot between owning administration yet.Therefore, adapt to realization biography circuit type data service in the code division multiple access system of the core net of IPization and IPization.
Description of drawings
Fig. 1 shows the flow chart of realizing the IWF business in the prior art;
Fig. 2 shows the flow chart that sends the IWF business from MS to facsimile machine of the present invention;
Fig. 3 shows the flow chart that sends the IWF business from facsimile machine to MS of the present invention.
Embodiment
Understand and realization the present invention the existing embodiments of the invention of describing in conjunction with the accompanying drawings for the ease of persons skilled in the art.
Basic thought of the present invention is, exhales in the professional beginning of IWF/when exhaling eventually, and BSC calls in the beginning and asks/and to indicate RTP carrying data in the A2p parameter in the page-response message be the IWF business, represents that BSC does not carry out the encoding and decoding conversion work of IWF data.Like this, when MSCe sent the Add order to MGW, indicating in the parameter needed MGW to carry out the IWF data transaction, and MGW carries out the conversion of IWF business datum again according to type of service parameter S O.
In order to realize the present invention, at first the used relevant signaling of the present invention is expanded.
1. in order to realize the present invention, the Bearer Format ID position that needs expansion expression IWF type of service, in the present invention, the Bearer Format ID position of expansion only represents that BSC does not carry out the conversion of IWF data to the ISLP data, but in compatible another piece patent file " a kind of method and system of realizing speech service switching to circuit type data service " in Bearer Update Request (bearer update request) message to the expansion of A2p parameter, here still use 8 extended values of Bearer Format ID, Bearer Format ID gets these 8 extended values and represents that BSC does not carry out the conversion of IWF data to the ISLP data.And the type of service of IWF is called for the SO that asks among message CM Service Request/ or the page-response message Paging Rsp in the beginning and is specified.Described bearer update request message comprises: A2p carrying special parameter and A2p session parameter.In the present invention, by A2p carrying special parameter is carried out the signaling expansion, do not carry out of the conversion of IWF data with expression BSC, so that in MGW, IWF data data are carried out the ISLP data transaction to the ISLP data.The form of A2P carrying special parameter is as follows:
A2p Bearer Format-Specific Parameters
As seen from the above table, A2p carrying special parameter (A2p Bearer Format-Specific Parameters) comprises bear format sign (Bearer Format ID) and RTP bearer types (RTP Paylod Type Value), bear format ID is 4 bits, only defined at present the enumerated value of 0-7, according to the present invention, the enumerated value 8-F of definition bear format ID and corresponding RTP bearer types represent that BSC does not carry out the conversion of IWF data to the ISLP data, it is defined as follows, wherein, table 1 shows the pairing type of service of 0-7 enumerated value of present definition, and table 2 shows 8-F enumerated value of the present invention and corresponding RTP bearer types.
Table 1
Bearer Format IDs & RTP Payload Types
Table 2
| Bearer Format ID | Encoding Name | RTP Payload Type Value | Meaning |
| 8 | ASYNDATA_SET1 | 11H | Asynchronous Data rate set 1 |
| 9 | GRPFAX_SET1 | 12H | Group 3 Fax rate set 1 |
| A | ASYNDATA_SET2 | 13H | Asynchronous Datarate set 2 |
| B | GRPFAX_SET1 | 14H | Group 3 Fax rate set 2 |
| C | AFAX_SO_4100 | 15H | Asynchronous Data Revision 1，9.6kbs or 14.4kbs |
| D | AFAX_SO_4101 | 16H | Group 3 Fax Revision 1，9.6kbs or 14.4kbs |
| E | AFAX_SO_20 | 17H | Analog Fax rate set 1 |
| F | AFAX_SO_21 | 18H | Analog Fax rate set2 |
The flow process of the IWF service call from MS to the facsimile machine of the present invention is described below with reference to Fig. 2.
Step 201, MS initiates to begin to call for to ask, BSC receive the beginning call for ask after, UDP (User Datagram Protoco (UDP)) port numbers and address that BSC distributes the A interface to use, send to MSCe then and begin to call for to ask (CM_SERV_Req) message, this message has the A2p bearing parameter, comprise in the A2p bearing parameter: A2p carries session parameter (A2p Bearer Session-Level Parameters), A2p carries special parameter (A2p Bearer Format-Specific Parameters), whether bear format ID (Bearer Format ID) the expression IWF business in the A2p carrying special parameter needs to carry out the conversion of IWF data to the ISLP data, and wherein 8-F is for representing not through the conversion of IWF data to the ISLP data; The type of service of IWF is called for another parameter S O that asks in the message by the beginning and is specified.
Step 202, MSCe send to MGW and add (Add) command messages, are with BC, SO parameter in this command messages, are used to refer to this time and call out the professional and corresponding bearing capacity for IWF; This command messages also has the ISLP sign, is FALSE here, and expression BSC does not carry out the conversion of IWF data to the ISLP data; Described interpolation order also has the RmtSDP parameter, and described RmtSDP parameter is BSC side SDP (Session Description Protocol) information.
After step 203, MGW receive and add order, divide udp port number and the address be used in the A interface, and be this call distribution C (context), and distribute with this and call out corresponding T end points, MGW inserts the IWF resource at this T end points, and apply for carrying out the codec of IWF data to the ISLP data transaction, and return to MSCe and add response (Add Rep) message, comprise local terminal SDP information LocSDP in the response message.
Step 204, MSCe send assignment request (Assignment Reqest) message to BSC, the UPD port of this IWF business of assignment and address, airlink, have the A2p bearing parameter in the assignment request message, wherein the bear format ID (Bearer Format ID) in the A2p carrying special parameter represents whether this IWF business has proceeded to the conversion of ISLP data.
Step 205, after UPD port and address, airlink assignment are finished, BSC returns assignment to MSCe and finishes message.
Step 206, MSCe issue change (Mod) command messages to MGW, so that activate the IWF business.
Step 207, MGW carry out the change order, thereby activate IWF.
Step 208, this moment, IWF can begin and MS carries out the process that the fax passages are set up in ppp negotiation etc.
After step 209, MSCe select outgoing circuit, issue interpolation (Add) order, require MGW that outgoing circuit is joined among the corresponding C to MGW.
Step 210, MGW are that outgoing circuit distributes corresponding T (T2), and T2 is joined among the C.
Step 211, MSCe send initial address message (IAM) to PSTN, so that be established to the circuit of PSTN.
Step 212, PSTN switch find corresponding facsimile machine and ring (RING) according to the called number in the IAM message.
Step 213, PSTN switch send Address Complete Message (ACM) to MSC, represent called ring.
Step 214, FAX (facsimile machine) reply (ANSWER) this time calling to the PSTN switch.
After step 215, PSTN switch are received the answer signal of facsimile machine, send response message (ANM) to MSCe, the expression facsimile machine is replied, and MSCe is connected on the IWF resource between PSTN circuit and the A5 mouth circuit.
Step 216, MSCe issue change (Mod) command messages to MGW, so that activate the IWF business.
Step 217, MGW carry out the change order, thereby activate IWF.
Begin facsimile posting between step 218, caller MS and the called facsimile machine.
Step 219, dismantling call.
Sending fax with facsimile machine to MS below is that example illustrates that MS receives the flow process of IWF business.
Step 301, FAX initiate IWF to the PSTN dialing and call out.
Step 302, PSTN issue MSCe with initial address message (IAM), are established to the circuit of MSCe.
Step 303, MSCe send to MGW and add (Add) order.
Step 304, MGW distribute the context C (C1) and the Calling Side end points T (T1) that call out after receiving and adding order.
Step 305, MSC initiate paging (Paging) to BSC after judging that the called subscriber is in local exchange.
Step 306, BSC return page response (Paging Res), have the A2p bearing parameter in the page response, and wherein the bear format ID (Bearer Format ID) in the A2p carrying special parameter is IWF, the type of service of SO parameter indicating IWF business.
Step 307, MSCe send to MGW and add (Add) order, are with BC, SO parameter in the order, are used to refer to this time calling and are the calling of IWF business; Also having the ISLP sign simultaneously, is FALSE here, and expression BSC does not carry out the conversion of IWF data to the ISLP data; RmtSDp parameter in the order is a BSC side SDP information.
After step 308, MGW receive and add order, divide udp port number and the address be used in the A interface, and distribution and udp port number and address corresponding T end points T2, T2 is joined C1, and in T2 end points insertion IWF resource, the codec of IWF data to the ISLP data transaction carried out in application, returns to MSCe then and adds response (Add Rsp) message, comprises local terminal SDP information LocSDP in the response message.
Step 309, MSCe send assignment request (Assignment Request) message to BSC, so that the UPD port of this IWF business of BSC assignment and address, airlink, have the A2p bearing parameter in the assignment request message, wherein the bear format ID (Bearer Format ID) in the A2p carrying special parameter is IWF.
Step 310, behind the UPD port of intact this IWF business of .BSC assignment and address, airlink, return assignment to MSCe and finish (Assignment Complete) message.
Step 311, MSCe issue change (Mod) command messages to MGW, so that activate the IWF business.
Step 312, MGW carry out the Mod order, thereby activate IWF.
Step 313, this moment, IWF can begin and MS carries out the process that the fax passages are set up in ppp negotiation etc.
Step 314, MSCe send initial address message (IAM) to PSTN, so that be established to the circuit of PSTN.
Step 314a, PSTN switch find corresponding facsimile machine and ring (RING) according to the called number in the IAM message.
Step 315, BSC send connection message to MSCe, reply this time and call out.
Step 316, MSCe send response message to PSTN.
Step 316a, PSTN send out connection message to facsimile machine.
Step 317, MSCe issue change (Mod) command messages to MGW, so that activate the IWF business.
Step 318, MGW carry out the change order, thereby activate IWF.
Step 319, between FAX and MS, carry out the transmission of IWF data.
Step 320 is removed after calling is finished.
The present invention also provides a kind of system that realizes circuit type data service, comprise: origination terminal, be used for the transtation mission circuit type data service request to mobile switching centre, described circuit type data service request comprises not through the sign of circuit type data service to the ISLP data transaction; Mobile switching centre, be used for according to circuit type data service request control media gateway insert and activation network between the IWF resource, and control base station controller assignment udp port number and address, airlink; Base station controller is used under the control of mobile switching centre assignment udp port number and address, airlink; Media gateway is used for overhead code converter resource, interworking between network functional resources; Receiving terminal is used to receive interworking between network function affair data.Described origination terminal and receiving terminal comprise travelling carriage and fixed station, and described fixed station is facsimile machine and other data service receiving terminal that is connected on the PSTN.
Therefore, according to the present invention, by expansion bearer update request message, making does not have TC in BSC, need just can not realize the IWF business, thereby save system resource under the situation of support to the detection of circuit type data service on the TDM time slot between owning administration yet.Therefore, adapt to realization biography circuit type data service in the code division multiple access system of the core net of IPization and IPization.
Though described the present invention by embodiment, those of ordinary skills know, without departing from the spirit and substance in the present invention, just can make the present invention that many distortion and variation are arranged, and scope of the present invention is limited to the appended claims.
Claims (9)
1. a method that realizes circuit type data business call is characterized in that, comprising:
A, mobile switching centre receive the circuit type data business call request that origination terminal sends;
B, mobile switching centre carry out the codec of interworking between network performance data to link protocol data transaction between system according to the circuit type data business call request by the media gateway application, and IWF resource between activation network;
C, mobile switching centre and receiving terminal connect, so that origination terminal and receiving terminal carry out circuit type data service.
2. the method for realization circuit type data business call according to claim 1 is characterized in that, described origination terminal and receiving terminal comprise respectively: travelling carriage and fixed station.
3. the method for realization circuit type data business call according to claim 2 is characterized in that, when origination terminal was travelling carriage, described steps A further comprised:
A1, origination terminal are issued mobile switching centre by base station controller with the circuit type data business call request.
4. the method for realization circuit type data business call according to claim 2 is characterized in that, when origination terminal was fixed station, described steps A further comprised:
A2, origination terminal are issued mobile switching centre by public switched telephone network (PSTN) with the circuit type data business call request.
5. according to the method for the wherein arbitrary described realization circuit type data business call of claim 1 to 4, it is characterized in that, before carrying out described step B, described method also comprises step: mobile switching centre obtains not pass through the sign of interworking between network function service to link protocol data transaction between system, and preparation method is as follows:
When origination terminal was travelling carriage, described mobile switching centre obtained not pass through the sign of interworking between network function service to link protocol data transaction system from the circuit type data business call request;
When receiving terminal was travelling carriage, described mobile switching centre obtained not pass through the sign of interworking between network function service to link protocol data transaction system from the page response that base station controller returns.
6. the method for realization circuit type data business call according to claim 2 is characterized in that, when origination terminal was travelling carriage, described step B further comprised:
B1, mobile switching centre send to media gateway and add order, so that media gateway distributing user datagram protocol port numbers and address, and distribution and the corresponding end points of User Datagram Protoco (UDP) port numbers and address;
B2, mobile switching centre send the assignment request to base station controller, so that the User Datagram Protoco (UDP) port of base station controller assignment interworking between network function service and address, airlink;
B3, mobile switching centre inter-communication function business between media gateway transmission change order is with activation network.
7. the method for realization circuit type data business call according to claim 1 is characterized in that, when receiving terminal was travelling carriage, described step B further comprised:
B1, mobile switching centre are to the Mobile Origination paging;
B2, mobile switching centre send to media gateway and add order, so that media gateway distributing user datagram protocol port numbers and address, and distribution and the corresponding end points of User Datagram Protoco (UDP) port numbers and address;
B3, mobile switching centre send the assignment request to base station controller, so that the User Datagram Protoco (UDP) port of base station controller assignment interworking between network function service and address, airlink;
B4, mobile switching centre inter-communication function business between media gateway transmission change order is with activation network.
8. the method for realization circuit type data business call according to claim 7 is characterized in that, described step B1 further comprises:
B11, mobile switching centre send to media gateway and add order, so that media gateway is distributed the context of Calling Side end points and calling;
B12, mobile switching centre are to the Mobile Origination paging.
9. a system that realizes circuit type data business call is characterized in that, comprising:
Origination terminal is used for the transtation mission circuit type data service request to mobile switching centre;
Mobile switching centre, be used for controlling the media gateway application and carry out the codec of interworking between network performance data to link protocol data transaction between system according to the circuit type data service request, and IWF resource between activation network, and control base station controller assigned user datagram protocol port numbers and address, airlink;
Base station controller is used for assigned user datagram protocol port numbers and address, airlink under the control of mobile switching centre;
Media gateway is used to apply for carrying out the codec of interworking between network performance data to link protocol data transaction between system, and overhead code converter resource, interworking between network functional resources;
Receiving terminal is used to receive interworking between network function service data.
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| CN1360449A (en) * | 2000-12-21 | 2002-07-24 | Lg电子株式会社 | Device and method for transmitting facsimile data in speech system |
| CN1691727A (en) * | 2004-04-21 | 2005-11-02 | 华为技术有限公司 | System for implementing IP fax service in CDMA system |
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| CN1848974A (en) | 2006-10-18 |
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