CN101360333B - Call connection establishing method - Google Patents
Call connection establishing method Download PDFInfo
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- CN101360333B CN101360333B CN2007101434845A CN200710143484A CN101360333B CN 101360333 B CN101360333 B CN 101360333B CN 2007101434845 A CN2007101434845 A CN 2007101434845A CN 200710143484 A CN200710143484 A CN 200710143484A CN 101360333 B CN101360333 B CN 101360333B
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Abstract
The invention discloses a call connection establishment method, which includes steps as following: S202, a mutual communication function body aside the start call sends out a call connection request to a mobile exchange center stimulation body aside the start call, along with special codec format; S204, the mobile exchange center stimulation body aside the start call responds to requests of the mutual communication function body aside the start call, to request a media gateway aside the start call to establish a mutual communication channel and (or) performs conversion according to the special codec format; S206, the mobile exchange center stimulation body aside the start call consults with the mobile exchange center stimulation body aside the end call, and the connection between the mutual communication function body aside the start call and the mutual communication function body aside the end call can be established by using the special codec format. Through the invention, the negotiation of the mutual commutation function body coding format between two mobile exchange center stimulation bodies can be realized.
Description
Technical field
The present invention relates to the communications field, relate more specifically to a kind of call connection establishing method.
Background technology
IWF (Interworking Function; Abbreviation IWF) entity is at code division multiple access (Code Division Multiple Access; Be called for short CDMA) equipment of IWF perhaps is provided between the CDMA data terminal between network and the PSTN (Public Switched Telephone Network is called for short PSTN).It utilizes travelling carriage (mobilestation; Be called for short MS) and IWF on modulator-demodulator (Modulator-Demodulator; Be called for short MODEM) come for the user provides and wired MODEM identical functions, to realize circuit data service (for example, fax or asynchronous data etc.).IWF possibly be at intra-office, also possibly be at interoffice.Interoffice is meant and relates to two mobile switching center emulations (mobileswitch center emulation is called for short MSCE) entity that its structure is as shown in Figure 1, is Session initiation Protocol (Session Initiation Protocol is called for short SIP) between the MSCE.Exhale side rising, the IWF data terminal can be linked into MSCE through PSTN or SIP network, 2G base station controller (Base Station Controller is called for short BSC) or 3G BSC.Exhale the IWF data terminal of side also can insert the whole MSCE of side that exhales equally, eventually through PSTN, SIP network, 2G BSC or 3G BSC.
MSCE handles call signaling and carries out coding/decoding negotiation, and WMG (MediaGateway is called for short MGW) is according to the result who consults, under the control of MSCE, the resource of distributing IWF with carry out coding/decoding negotiation, transmit the data of IWF at last.
The problem that exists at present is, existing encoding and decoding are not to the definition of IWF data format.In order to support the simultaneous asynchronous data transmissions function or the fax of interoffice, need the new encoding and decoding of definition, so that between MSCE, hold consultation.
Summary of the invention
One or more problems in view of the above the invention provides a kind of new call connection establishing method.
According to call connection establishing method of the present invention, may further comprise the steps: S202, the beginning interworking function entity of exhaling side is exhaled the mobile switching center emulation entity of the side connection request that makes a call to the beginning, and carries specific code/decode format; S204, the beginning mobile switching center emulation entity of exhaling side is exhaled the request of the interworking function entity of side in response to the beginning, and the request beginning exhales the WMG of side to set up the IWF passage and/or carries out the code/decode format conversion according to specific code/decode format; And S206; The beginning mobile switching center emulation entity of exhaling side with exhale the mobile switching center emulation entity of side to hold consultation eventually, connect to use specific code/decode format to exhale the interworking function entity of side and exhale eventually to set up to call out between the interworking function entity of side in the beginning.
Wherein, step S204 may further comprise the steps: S2042, and the beginning exhales the mobile switching center emulation entity judgement beginning of side to exhale the WMG of side whether to support specific code/decode format; S2044; Exhale the WMG of side to support under the situation of specific code/decode format in the beginning, the beginning exhales the mobile switching center emulation entity requests beginning of side to exhale the WMG of side to set up the IWF passage and/or carries out the code/decode format conversion according to specific code/decode format.
Wherein, step S206 may further comprise the steps: S2062, and the beginning exhales the mobile switching center emulation entity of side to exhale the mobile switching center emulation entity initiation session of side to set up request to end, and carries specific code/decode format; S2064 exhales the mobile switching center emulation entity judgement of side to exhale the WMG of side whether to support specific code/decode format eventually eventually; S2066; Support under the situation of specific code/decode format at the WMG of exhaling side eventually; Exhale the mobile switching center emulation entity requests of side to exhale the WMG of side to carry out encoding and decoding conversion eventually eventually, and exhale the mobile switching center emulation entity of side to return to the beginning and exhale the selected message of using specific code/decode format of side eventually according to specific code/decode format.
Wherein, the beginning exhales the mobile switching center emulation entity of side through Session Description Protocol specific code/decode format to be carried to the mobile switching center emulation entity of exhaling side eventually.The beginning interworking function entity of exhaling side exhales PSTN that base station controller or the beginning of side exhale side to exhale the mobile switching center emulation entity of the side connection request that makes a call to the beginning through the beginning.Wherein, specific code/decode format is the base station controller appointment of being exhaled side by the beginning.Base station controller or the PSTN of eventually exhaling side of the mobile switching center emulation entity of wherein, exhaling side eventually through exhaling side to the end connection request that makes a call is set up to call out with the interworking function entity of exhaling side eventually and is connected.
Through the present invention, can realize the negotiation of two interworking function entity coded formats between the mobile switching center emulation entity.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the network frame sketch map of interworking function entity;
Fig. 2 A to Fig. 2 C is the flow chart of call connection establishing method and step according to an embodiment of the invention;
Fig. 3 is the schematic flow sheet of call connection establishing method in accordance with another embodiment of the present invention; And
Fig. 4 is the interworking function entity resource allocation sketch map according to the embodiment of the invention.
Embodiment
With reference to accompanying drawing, specify embodiment of the present invention below.
With reference to figure 2A to Fig. 2 C, call connection establishing method according to an embodiment of the invention is described.Shown in Fig. 2 A, this call connection establishing method may further comprise the steps: S202, and the beginning interworking function entity of exhaling side is exhaled the mobile switching center emulation entity of the side connection request that makes a call to the beginning, and carries specific code/decode format; S204, the beginning mobile switching center emulation entity of exhaling side is exhaled the request of the interworking function entity of side in response to the beginning, and the request beginning exhales the WMG of side to set up the IWF passage and/or carries out the code/decode format conversion according to specific code/decode format; And S206; The beginning mobile switching center emulation entity of exhaling side with exhale the mobile switching center emulation entity of side to hold consultation eventually, connect to use specific code/decode format to exhale the interworking function entity of side and exhale eventually to set up to call out between the interworking function entity of side in the beginning.
Wherein, shown in Fig. 2 B, step S204 may further comprise the steps: S2042, and the beginning exhales the mobile switching center emulation entity judgement beginning of side to exhale the WMG of side whether to support specific code/decode format; S2044; Exhale the WMG of side to support under the situation of specific code/decode format in the beginning, the beginning exhales the mobile switching center emulation entity requests beginning of side to exhale the WMG of side to set up the IWF passage and/or carries out the code/decode format conversion according to specific code/decode format.
Wherein, shown in Fig. 2 C, step S206 may further comprise the steps: S2062, and the beginning exhales the mobile switching center emulation entity of side to exhale the mobile switching center emulation entity initiation session of side to set up request to end, and carries specific code/decode format; S2064 exhales the mobile switching center emulation entity judgement of side to exhale the WMG of side whether to support specific code/decode format eventually eventually; S2066; Support under the situation of specific code/decode format at the WMG of exhaling side eventually; Exhale the mobile switching center emulation entity requests of side to exhale the WMG of side to carry out encoding and decoding conversion eventually eventually, and exhale the mobile switching center emulation entity of side to return to the beginning and exhale the selected message of using specific code/decode format of side eventually according to specific code/decode format.
Wherein, the beginning exhales the mobile switching center emulation entity of side through Session Description Protocol specific code/decode format to be carried to the mobile switching center emulation entity of exhaling side eventually.The beginning interworking function entity of exhaling side exhales PSTN that base station controller or the beginning of side exhale side to exhale the mobile switching center emulation entity of the side connection request that makes a call to the beginning through the beginning.Wherein, specific code/decode format is the base station controller appointment of being exhaled side by the beginning.Base station controller or the PSTN of eventually exhaling side of the mobile switching center emulation entity of wherein, exhaling side eventually through exhaling side to the end connection request that makes a call is set up to call out with the interworking function entity of exhaling side eventually and is connected.
With reference to figure 3, call connection establishing method in accordance with another embodiment of the present invention is described.Wherein, rise with 3G BSC and to exhale, PSTN exhales eventually and is example, describes this call connection establishing method.As shown in Figure 3, this call connection establishing method may further comprise the steps:
S302, the IWF data terminal to the MSCE connection request that makes a call, wherein carries the code/decode format IWF of 3G BSC appointment through 3G BSC.Wherein, IWF is the title of code/decode format, but the invention is not restricted to this concrete title, as long as expression is the professional code/decode format of IWF of redetermination, all belongs within the scope of the invention.
S304, MSCE judge whether the MGW of control supports IWF, and under the situation of MGW support IWF, change to MGW application IWF passage and code/decode format.
S306, MGW return the result of Request Processing.
S308 works the MSCE that exhales side and exhales the MSCE initiation session of side to set up request to end, comprises SDP in the request, in SDP, is appointed as the code/decode format of IWF.
S310, exhale the MSCE of side to receive that request is set up in session eventually after, judge whether the MGW that local terminal is controlled supports the IWF code/decode format.If support, then send request to the MGW gateway, require to carry out the conversion of code/decode format.Because exhale side joint to go into PSTN eventually, therefore need not apply for the IWF passage.
S312, MGW return the result of Request Processing.
S314 exhales the MSCE of side to return the selected code/decode format IWF of local terminal to working the MSCE that exhales side eventually, and simultaneously, expression is consulted successfully.
S316, the MSCE that exhales side eventually connects to set up to call out to the PSNT at the IWF data terminal place request of setting up that makes a call.
Wherein, for application and the distribution of further understanding the IWF resource, rise with 3G BSC exhale, PSTN exhales eventually and is example, describes resource and access diagram on the MGW.As shown in Figure 4,404 have been meant the MGW that exhales side MSCE control, and application has the IWF resource on MGW, and promptly the IWF passage is responsible for carrying out the processing of IWF protocol stack and the analysis of data.Code converter (Transcoder is called for short TC) is responsible for encoding and decoding are changed.The 406th, exhale the MGW of side MSCE control eventually, on this MGW, only carry out the conversion of encoding and decoding, do not apply for the resource (because and do not exist between the PSTN conversion of protocol stack) of IWF.
Can find out by above-described two embodiment, in above-described two embodiment, all comprise an interoffice IWF coding/decoding negotiation step.Wherein, define a kind of new code/decode format, and when the IWF session is set up, select the code/decode format of redetermination through the negotiation between two MSCE.
Wherein, working the MSCE exhale side can be through specifying the code/decode format of redetermination in Session Description Protocol (SessionDescription Protocol is called for short SDP), the code/decode format of redetermination is transferred to exhales the MSCE of side eventually.In SDP, the code/decode format of IWF can be described below:
m＝audio?50000?RTP/AVP?98
a＝rtpmap：98?IWF/8000
In addition, exhale the MSCE of side can be through analyzing the code/decode format select redetermination eventually, and the result that will select have returned to the MSCE that exhales, thus the completion negotiation.Wherein, the beginning exhales side and/or exhales the MSCE of side to control MGW and to distribute the IWF resource or carry out the code/decode format conversion according to selected code/decode format eventually, sets up the bearer path of IWF data.Go up the data of the bearer path transmission IWF that sets up at last through MGW.
That is to say that the present invention can pass through a kind of new code/decode format of definition, and, accomplish interoffice IWF business function through the negotiation between the interoffice MSCE.Though the present invention is that example is illustrated with the soft switch of CDMA, is not limited to CDMA, also contains the negotiation of other interoffices IWF, like WCDMA and fixed network soft switch etc.
The above is merely embodiments of the invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the claim scope of the present invention.
Claims (8)
1. a call connection establishing method is characterized in that, may further comprise the steps:
S202, the beginning interworking function entity of exhaling side is exhaled the mobile switching center emulation entity of the side connection request that makes a call to the beginning, and carries specific code/decode format;
S204, the mobile switching center emulation entity of exhaling side of said beginning is exhaled the request of the interworking function entity of side in response to the said beginning, and the request beginning exhales the WMG of side to set up the IWF passage and/or carries out the code/decode format conversion according to said specific code/decode format; And
S206; The mobile switching center emulation entity of exhaling side of said beginning with exhale the mobile switching center emulation entity of side to hold consultation eventually, connect to use said specific code/decode format to exhale the interworking function entity of side and exhale eventually to set up to call out between the interworking function entity of side in the said beginning.
2. call connection establishing method according to claim 1 is characterized in that, said step S204 may further comprise the steps:
S2042, the said beginning exhales the mobile switching center emulation entity of side to judge that the said beginning exhales the WMG of side whether to support said specific code/decode format; And
S2044; Exhale the WMG of side to support under the situation of said specific code/decode format in the said beginning, the said beginning exhales the said beginning of mobile switching center emulation entity requests of side to exhale the WMG of side to set up the IWF passage and/or carries out the code/decode format conversion according to said specific code/decode format.
3. call connection establishing method according to claim 1 and 2 is characterized in that, said step S206 may further comprise the steps:
S2062, the said beginning exhales the mobile switching center emulation entity of side to exhale the mobile switching center emulation entity initiation session of side to set up request to said end, and carries said specific code/decode format;
S2064 exhales the mobile switching center emulation entity judgement of side to exhale the WMG of side whether to support said specific code/decode format eventually said end; And
S2066; Exhale the WMG of side to support under the situation of said specific code/decode format at said end; Exhale said end the mobile switching center emulation entity requests of side to exhale said end the WMG of side to carry out encoding and decoding conversion, and exhale the mobile switching center emulation entity of side to return to exhale said end the selected message of using said specific code/decode format of side to the said beginning according to said specific code/decode format.
4. call connection establishing method according to claim 3 is characterized in that, the said beginning exhales the mobile switching center emulation entity of side through Session Description Protocol said specific code/decode format to be carried to the mobile switching center emulation entity of exhaling side said end.
5. call connection establishing method according to claim 4; It is characterized in that the interworking function entity of exhaling side of said beginning exhales PSTN that base station controller or the beginning of side exhale side to exhale the mobile switching center emulation entity of the side connection request that makes a call to the said beginning through the beginning.
6. call connection establishing method according to claim 5 is characterized in that, said specific code/decode format is the base station controller appointment of being exhaled side by the said beginning.
7. call connection establishing method according to claim 5; It is characterized in that the mobile switching center emulation entity of exhaling side said end is set up to call out with the interworking function entity of exhaling side said end and is connected through the base station controller of exhaling side to the end connection request that makes a call.
8. call connection establishing method according to claim 5; It is characterized in that the mobile switching center emulation entity of exhaling side said end is set up to call out with the interworking function entity of exhaling side said end and is connected through the PSTN of exhaling side to the end connection request that makes a call.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101434845A CN101360333B (en) | 2007-08-01 | 2007-08-01 | Call connection establishing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101434845A CN101360333B (en) | 2007-08-01 | 2007-08-01 | Call connection establishing method |
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| CN101360333A CN101360333A (en) | 2009-02-04 |
| CN101360333B true CN101360333B (en) | 2012-01-11 |
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| CN2007101434845A Expired - Fee Related CN101360333B (en) | 2007-08-01 | 2007-08-01 | Call connection establishing method |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101534571B (en) * | 2009-04-07 | 2011-06-22 | 中兴通讯股份有限公司 | Method and system achieving the IWF service communication among the networks |
| ES2557309T3 (en) | 2009-08-21 | 2016-01-25 | Telefonaktiebolaget Lm Ericsson (Publ) | Use of a common media gateway node and a codec coordinated by an originating and terminating call control node |
| WO2014194520A1 (en) * | 2013-06-07 | 2014-12-11 | 华为技术有限公司 | Measurement parameter configuration method, user equipment and device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1466855A (en) * | 2001-02-13 | 2004-01-07 | Method for defining the coding for useful information generated according to different coding laws between at least two subscriber terminals | |
| CN1882116A (en) * | 2005-08-11 | 2006-12-20 | 华为技术有限公司 | Mobile switching centre built in video gateway and method for realizing multimedia interconnection |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1466855A (en) * | 2001-02-13 | 2004-01-07 | Method for defining the coding for useful information generated according to different coding laws between at least two subscriber terminals | |
| CN1882116A (en) * | 2005-08-11 | 2006-12-20 | 华为技术有限公司 | Mobile switching centre built in video gateway and method for realizing multimedia interconnection |
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| CN101360333A (en) | 2009-02-04 |
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