CN101577947A - Call establishing method and switching method - Google Patents
Call establishing method and switching method Download PDFInfo
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- CN101577947A CN101577947A CNA2008100967989A CN200810096798A CN101577947A CN 101577947 A CN101577947 A CN 101577947A CN A2008100967989 A CNA2008100967989 A CN A2008100967989A CN 200810096798 A CN200810096798 A CN 200810096798A CN 101577947 A CN101577947 A CN 101577947A
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Abstract
The invention discloses a call establishing method which is used for the call connection between a moving and switching center server and a base station controller, wherein an interface between the base station controller and the moving and switching center server is based on an IP carrier. The method comprises the steps: a call establishing request is transmitted to the base station controller by the moving and switching center server, and a call identifier which is used for identifying the call is carried in the call establishing request. The invention also discloses a switching method. The invention solves the problem that when the interface between the base station controller and the moving and switching center server is based on the IP carrier, the call can not be identified, and the call identification of the call establishing process between the moving and switching center server and the base station controller and the switching process is realized.
Description
Technical field
The present invention relates to the communications field, be specifically related to call-establishing method and changing method.
Background technology
At existing global system for mobile communications (Global System for MobileCommunications, abbreviate GSM as) in, (the Mobile SwitchingCenter of mobile switching centre, abbreviate MSC as) and base station controller (Base Station Controller, abbreviate BSC as) between adopt the A interface to carry out communication, wherein, the A interface is based on time division multiplexing (Time Division Multiple, abbreviate TDM as) carry, transmission is pulse code modulation (Pulse Code Modulation abbreviates PCM as) the speech coding signal of 64Kbps thereon.
Among the GSM, adopt air interface Um to carry out communication between portable terminal (Mobile Station abbreviates MS as) and the base station (BaseStation abbreviates BTS as), wherein, what Um Interface transmitted is the compressed voice code signal; Adopt Abis interface to carry out communication between BTS and the BSC, wherein, Abis interface is based on the TDM carrying, and transmission is the compressed voice code signal identical with Um Interface thereon.
Wherein, BSC has code conversion and rate adaptation function (Transcode RateAdaption Unit, abbreviate TRAU as), and this function is by codec unit (TransCoder, abbreviate TC as) realize, finish the conversion of the PCM speech coding of the 64Kbps that transmits in the compressed voice coding that transmits in the Abis interface and the A interface by TC.
Development along with the third generation mobile system, behind 3GPP release 4, core net has realized separating of control and carrying, MSC resolves into two functional entitys: Mobile Switching Center Server (Mobile Switching Center Server, abbreviate MSC Server as) and media gateway (Media Gateway, abbreviate MGW as), the interface between the two is a Mc interface, MSC Server finishes control to MGW by Mc interface.Wherein, MSC Server is mainly used to finish the control to signaling and calling, MGW mainly provides service bearer, and MGW can be used as destination node and handles from the Bearer Channel of Circuit Switching Network or the data flow of Packet Based Network, the conversion of MGW support media, carrying control and load are handled, as carry out encoding and decoding, echo and suppress conference etc.
Along with the application of Internet protocol (Internet Protocol abbreviates IP as) technology in wireless network, the A interface progressively adopts based on IP carrying (A Interface Over IP abbreviates AoIP as).As shown in Figure 1, under the situation of A interface based on the IP carrying, the gsm communication network comprises: portable terminal 60, base station 50, base station controller 20, media gateway 30, Mobile Switching Center Server 10, and the Mc interface between the A interface between the Abis interface between the Um Interface between portable terminal 60 and the base station 50, base station 50 and the base station controller 20, base station controller 20 and media gateway 30 and the Mobile Switching Center Server 10, Mobile Switching Center Server 10 and the media gateway 30.
After introducing the IP carrying, circuit identification code (the Circuit Identifier Code that is used to identify certain specific call in the BSSMAP message when carrying based on TDM in the prior art, abbreviate CIC as) will no longer be applicable to AoIP, because that existing C IC sign is certain pulse code modulation (Pulse Code Modulate, abbreviate PCM as) certain time slot of link, and the A interface among the AoIP does not have the PCM carrying, can't realize the calling between wireless network and the core net.
Summary of the invention
Consider that the Mobile Switching Center Server that exists in the correlation technique and the interface between the base station controller can't carry out the problem of call identification when carrying based on IP and proposes the present invention, for this reason, main purpose of the present invention is to provide call-establishing method and changing method, to address the above problem.
According to an aspect of the present invention, provide a kind of call-establishing method, this method is used for Mobile Switching Center Server and is connected with calling between the base station controller, and wherein, the interface between base station controller and the Mobile Switching Center Server carries based on IP.
Call-establishing method according to the embodiment of the invention comprises: Mobile Switching Center Server sends setup requests to base station controller, and carries the call identifier that is used to identify this calling in setup requests.
Wherein, Mobile Switching Center Server receives after the call request of terminal, and Mobile Switching Center Server carries out internal algorithm to self information to be handled, and obtains call identifier.
Preferably, the processing that obtains call identifier comprises one of following: IP address and the addition of User Datagram Protoco (UDP) udp port with Mobile Switching Center Server obtain call identifier; With the internal module identifier of Mobile Switching Center Server as call identifier; With any one serial number of Mobile Switching Center Server inside as call identifier.
According to a further aspect in the invention, provide a kind of changing method, this method is used for terminal when switching between source base station and target BS.
Changing method according to the embodiment of the invention comprises: Mobile Switching Center Server receives the switching requirement of the base station controller transmission of source base station; Mobile Switching Center Server sends handoff request to the base station controller of target BS, and carries the call identifier that is used to identify the calling that this switching takes place in handoff request.
Wherein, Mobile Switching Center Server receives after switching that the base station controller of source base station sends requires, and Mobile Switching Center Server carries out internal algorithm to self information to be handled, and obtains call identifier.
Preferably, the processing that obtains call identifier comprises one of following: IP address and the addition of User Datagram Protoco (UDP) udp port with Mobile Switching Center Server obtain call identifier; With the internal module identifier of Mobile Switching Center Server as call identifier; With any one serial number of Mobile Switching Center Server inside as call identifier.
According to a further aspect in the invention, provide a kind of changing method, this method is used for terminal and switches between the different districts of same base station controller.
Changing method according to the embodiment of the invention comprises: after Mobile Switching Center Server receives that the base station controller of source base station sends inner handoff request, send internal switching consulting to base station controller, and in internal switching consulting, carry the call identifier that is used to identify the calling that this switching takes place.
Wherein, after Mobile Switching Center Server received the inside handoff request that the base station controller of source base station sends, Mobile Switching Center Server carries out internal algorithm to self information to be handled, and obtains call identifier.
Preferably, the processing that obtains call identifier comprises one of following: IP address and the addition of User Datagram Protoco (UDP) udp port with Mobile Switching Center Server obtain call identifier; With the internal module identifier of Mobile Switching Center Server as call identifier; With any one serial number of Mobile Switching Center Server inside as call identifier.
By above-mentioned at least one technical scheme of the present invention, solved when interface between Mobile Switching Center Server and the base station controller carries based on IP and can't call out, realized call establishment and handoff procedure between Mobile Switching Center Server and the base station controller.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used from explanation the present invention with embodiments of the invention one, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the schematic network structure of GSM communication system under the AoIP situation according to correlation technique;
Fig. 2 is the flow chart according to the call-establishing method of the inventive method embodiment;
Fig. 3 is the flow chart of the embodiment one of method shown in Figure 2;
Fig. 4 is the flow chart according to the changing method of the inventive method embodiment;
Fig. 5 is the flow chart of the embodiment two of method shown in Figure 4;
Fig. 6 is the flow chart according to the changing method of the inventive method embodiment;
Fig. 7 is the flow chart of the embodiment three of method shown in Figure 6.
Embodiment
According to the embodiment of the invention, provide a kind of call-establishing method.
Fig. 2 is the flow chart according to the call-establishing method of the embodiment of the invention, as shown in Figure 2, this method is used for Mobile Switching Center Server (MSC Server) and is connected with calling between the base station controller (BSC), wherein, interface between base station controller and the Mobile Switching Center Server carries based on IP, may further comprise the steps:
Step S202, Mobile Switching Center Server sends setup requests to base station controller, and carries the call identifier that is used to identify this calling in setup requests.
By the technical scheme that the embodiment of the invention provides, realized the call establishment when interface between Mobile Switching Center Server and the base station controller carries based on IP.
Wherein, in step S202, Mobile Switching Center Server receives after the call request of terminal, and Mobile Switching Center Server carries out internal algorithm to self information to be handled, and obtains call identifier.
Preferably, in step S202, it is one of following that the processing that obtains call identifier can comprise: IP address and the addition of User Datagram Protoco (UDP) (UDP) port numbers with Mobile Switching Center Server obtain call identifier; With the internal module identifier of Mobile Switching Center Server as call identifier; With any one serial number of Mobile Switching Center Server inside as call identifier.
Embodiment one
Fig. 3 is the detailed process flow chart according to the call-establishing method of the inventive method embodiment, and as shown in Figure 3, this method may further comprise the steps:
Step S302, MSC Server handle by internal algorithm and obtain the unique call identifier (AoIP identifier) of the overall situation.
Step S304, MSC Server puts into assignment request (being setup requests mentioned above) with the AoIP call identifier that generates and sends to BSC, and BSC has just obtained this AoIP call identification after receiving this assignment request;
Step S306, in response to above-mentioned assignment request, BSC sends to MSC Server with the assignment request response.
Need to prove, send in the assignment request of BSC at MSC Server, this AoIP call identifier is as shown in table 1 as the message structure of expansion cell in assignment request, the cell of expansion one " AoIP Call Identifier (being the AoIP call identifier) " by name in this assignment request, the definition of this AoIP Call Identifier cell is as shown in table 2.
Table 1
| Cell | Describe | Direction | Type | Length |
| Message Type type of message | Assignment request | MSC-BSS | M | 1 |
| ... | ||||
| AoIP Call Identifier AoIP call identifier | Be used for the overall situation and identify certain calling uniquely | MSC-BSC | M | 3 |
Table 2
| Cell | Type | Direction | Length | Remarks |
| AoIP Call Identifier AoIP call identifier | M | MSC Server-B SC Server Single direction MSC Server-BSC is unidirectional | 3 eight hytes of 3Octet |
Wherein, MSC Server carries out the internal algorithm processing to self information in step S302, obtain the unique AoIP call identifier of the overall situation, the mode that obtains this AoIP call identifier can comprise multiple, for example, can choose with the IP address of MSC Server and udp port addition and as the AoIP call identifier; The combination of identifier of module that also can adopt the inner internal unit relevant with this AoIP calling of MSC Server is as the AoIP call identifier; A serial number that can also adopt MSC Server inside is as the AoIP call identifier.
According to the embodiment of the invention, also provide a kind of changing method.
Fig. 4 is the flow chart according to the changing method of the embodiment of the invention, and as shown in Figure 6, this method is used for terminal when switching between source base station and target BS, may further comprise the steps:
Step S402, Mobile Switching Center Server receive the switching requirement of the base station controller transmission of source base station;
Step S404, Mobile Switching Center Server sends handoff request to the base station controller of target BS, and carries the call identifier that is used to identify the calling that this switching takes place in handoff request.
By the technical scheme that the embodiment of the invention provides, when having realized that interface between Mobile Switching Center Server and the base station controller carries based on IP, the process that terminal is switched between the sub-district of different base station controller.
Wherein, in step S404, Mobile Switching Center Server receives after switching that the base station controller of source base station sends requires, and Mobile Switching Center Server carries out internal algorithm to self information to be handled, and obtains call identifier.
Preferably, in step S404, it is one of following that the processing that obtains call identifier comprises: IP address and the addition of User Datagram Protoco (UDP) udp port with Mobile Switching Center Server obtain call identifier; With the internal module identifier of Mobile Switching Center Server as call identifier; With any one serial number of Mobile Switching Center Server inside as call identifier.
Embodiment two
Fig. 5 is the detailed process flow chart according to the changing method of the inventive method embodiment, and as shown in Figure 5, this method may further comprise the steps:
Step S502, the source BSC of wireless network side send to the MSC of core-network side Server and switch requirement;
Step S504, MSC Server handle by internal algorithm and obtain the unique AoIP call identifier of the overall situation;
Step S506, MSC Server puts into handoff request with this AoIP call identifier, and this handoff request is sent to target BS C, and target BS C has just obtained about this AoIP call identifier after receiving this handoff request.
Need to prove, send in the handoff request of BSC at MSC, this AoIP call identifier is as shown in table 3 as the message structure of expansion cell in handoff request, the cell of expansion one " AoIP Call Identifier (being the AoIP call identifier) " by name in this handoff request, the definition of this AoIP Call Identifier cell is as shown in table 2.
Table 3
| Cell | Describe | Direction | Type | Length |
| Message Type type of message | Handoff request | MSC-BSS | M | 1 |
| 。。 | ||||
| AoIP Call Identifier AoIP call identifier | Be used for the overall situation and identify certain calling uniquely | MSC-BSS | M | 3 |
Wherein, MSC Server carries out internal algorithm to self information and handles in step S504, and the mode that obtains this AoIP call identifier among the mode that obtains the unique AoIP call identifier of the overall situation and the embodiment one is identical, no longer is repeated in this description here.
According to the embodiment of the invention, also provide a kind of changing method.
Fig. 6 is the flow chart according to the changing method of the embodiment of the invention, and as shown in Figure 6, this method is used for terminal to be switched between the different districts of same base station controller, may further comprise the steps:
Step S602, Mobile Switching Center Server receive that the base station controller of source base station sends inner handoff request;
Step S604 sends internal switching consulting to base station controller, and carries the call identifier that is used to identify the calling that this switching takes place in internal switching consulting.
By the technical scheme that the embodiment of the invention provides, when having realized that interface between Mobile Switching Center Server and the base station controller carries based on IP, the process that terminal is switched between the different districts of same base station controller.
Wherein, among the step S604, after Mobile Switching Center Server received the inside handoff request that the base station controller of source base station sends, Mobile Switching Center Server carries out internal algorithm to self information to be handled, and obtains call identifier.
Preferably, among the step S604, it is one of following that the processing that obtains call identifier comprises: IP address and the addition of User Datagram Protoco (UDP) udp port with Mobile Switching Center Server obtain call identifier; With the internal module identifier of Mobile Switching Center Server as call identifier; With any one serial number of Mobile Switching Center Server inside as call identifier.
Embodiment three
Fig. 7 is the detailed process flow chart according to the changing method of the inventive method embodiment, and as shown in Figure 7, this method may further comprise the steps:
Step S702, BSC sends inner handoff request to MSC Server;
Step S704, MSC Server handles by internal algorithm, obtains the unique AoIP call identifier of the overall situation;
Step S706, MSC Server this AoIP call identifier then put into internal switching consulting, and this internal switching consulting is sent to BSC, and BSC has just obtained this AoIP call identifier after receiving this internal switching consulting.
Need to prove, send in the internal switching consulting of BSC at MSC Server, this AoIP call identifier is as shown in table 4 as the message structure of expansion cell in internal switching consulting, the cell of expansion one " AoIP Call Identifier (being the AoIP call identifier) " by name in this inside handoff request, the definition of this AoIP Call Identifier cell is as shown in table 2.
Table 4
| Cell | Describe | Direction | Type | Length |
| Message Type type of message | Internal switching consulting | MSC-BSS | M | 1 |
| 。。 | ||||
| AoIP Call Identifier AoIP call identifier | Be used for the overall situation and identify certain calling uniquely | MSC-BSS | M | 3 |
Wherein, MSC Server carries out internal algorithm to self information and handles in step S704, and the mode that obtains this AoIP call identifier among the mode that obtains the unique AoIP call identifier of the overall situation and the embodiment one is identical, no longer is repeated in this description here.
As above, by means of call-establishing method provided by the invention and/or changing method, solved when interface between Mobile Switching Center Server and the base station controller carries based on IP and can't call out, realized call establishment and handoff procedure between Mobile Switching Center Server and the base station controller.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. call-establishing method is used for Mobile Switching Center Server and is connected with calling between the base station controller, and wherein, the interface between described base station controller and the Mobile Switching Center Server carries based on IP, it is characterized in that, described method comprises:
Described Mobile Switching Center Server sends setup requests to described base station controller, and carries the call identifier that is used to identify this calling in described setup requests.
2. method according to claim 1 is characterized in that, described Mobile Switching Center Server receives after the call request of terminal, and described Mobile Switching Center Server carries out internal algorithm to self information to be handled, and obtains described call identifier.
3. method according to claim 2 is characterized in that, it is one of following that the processing that obtains described call identifier comprises:
IP address and the addition of User Datagram Protoco (UDP) udp port with described Mobile Switching Center Server obtain described call identifier;
With the internal module identifier of described Mobile Switching Center Server as described call identifier;
With any one serial number of described Mobile Switching Center Server inside as described call identifier.
4. changing method when being used for terminal and switching between source base station that belongs to the different base station controller and target BS, is characterized in that, comprising:
Mobile Switching Center Server receives the switching requirement of the base station controller transmission of source base station;
Described Mobile Switching Center Server sends handoff request to the base station controller of described target BS, and carries the call identifier that is used to identify the calling that this switching takes place in described handoff request.
5. method according to claim 4, it is characterized in that, described Mobile Switching Center Server receives after switching that the base station controller of source base station sends requires, and described Mobile Switching Center Server carries out internal algorithm to self information to be handled, and obtains described call identifier.
6. method according to claim 5 is characterized in that, it is one of following that the processing that obtains described call identifier comprises:
IP address and the addition of User Datagram Protoco (UDP) udp port with described Mobile Switching Center Server obtain described call identifier;
With the internal module identifier of described Mobile Switching Center Server as described call identifier;
With any one serial number of described Mobile Switching Center Server inside as described call identifier.
7. a changing method is used for terminal and switches between the different districts of same base station controller, it is characterized in that described method comprises:
After Mobile Switching Center Server receives that the base station controller of described base station sends inner handoff request, send internal switching consulting to described base station controller, and in described internal switching consulting, carry the call identifier that is used to identify the calling that this switching takes place.
8. method according to claim 7, it is characterized in that, after described Mobile Switching Center Server received the inside handoff request that the base station controller of source base station sends, described Mobile Switching Center Server carries out internal algorithm to self information to be handled, and obtains described call identifier.
9. method according to claim 8 is characterized in that, it is one of following that the processing that obtains described call identifier comprises:
IP address and the addition of User Datagram Protoco (UDP) udp port with described Mobile Switching Center Server obtain described call identifier;
With the internal module identifier of described Mobile Switching Center Server as described call identifier;
With any one serial number of described Mobile Switching Center Server inside as described call identifier.
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| CNA2008100967989A CN101577947A (en) | 2008-05-09 | 2008-05-09 | Call establishing method and switching method |
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| CNA2008100967989A CN101577947A (en) | 2008-05-09 | 2008-05-09 | Call establishing method and switching method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012006927A1 (en) * | 2010-07-12 | 2012-01-19 | 中兴通讯股份有限公司 | Method, system and equipment for establishing bearer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012006927A1 (en) * | 2010-07-12 | 2012-01-19 | 中兴通讯股份有限公司 | Method, system and equipment for establishing bearer |
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