CN1937577A - Method for selecting bearer channel and media gateway - Google Patents
Method for selecting bearer channel and media gateway Download PDFInfo
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- CN1937577A CN1937577A CNA2006100371577A CN200610037157A CN1937577A CN 1937577 A CN1937577 A CN 1937577A CN A2006100371577 A CNA2006100371577 A CN A2006100371577A CN 200610037157 A CN200610037157 A CN 200610037157A CN 1937577 A CN1937577 A CN 1937577A
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Abstract
The invention discloses a bearing channel selecting method, comprising: (a) media gateway controller sends control signal carrying set tags to media gateway, where the set marked by each set tag contains plural end tags corresponding to bearing channels one to one; (b) the media gateway finds the sets corresponding to the set tags and selects idle channels corresponding to the end tags. And it also discloses a media gateway for making media stream conversion by the method above. And it makes all virtual media gateways divided by the media gateway able to share bearing channel ends, thus raising resources utilization and making configuration and maintenance become simple and easy to operate.
Description
Technical field
The present invention relates to a kind of network communications technology, relate in particular to a kind of technology of selecting bearer path.
Background technology
(Internet Protocol, IP network IP) has the advantage that agreement is simple, terminal equipment is cheap, is explosive growth based on IP protocol of I P net owing to internet protocol-based.IP network requirement user terminal all is encapsulated in user data information in the IP bag and transmits on IP network, and the IP bag can carry the Any user data message, has created condition for realize that multiple information such as voice, data, media stream transmit in a bearer network.
In recent years, fixed-line telephone network and mobile network had occurred all that (PublicSwitched Telephone Network is PSTN) to the trend of IP network transition from public switched telephone network (PSTN).
Provide voice, data and multimedia service on the same network simultaneously in order to be implemented in, i.e. the fusion of communication service has produced soft switch (soft switch) technology.
Softswitch technology independently becomes a physical entity with the service access module of telephone exchange, be called media gateway (Media Gateway, MGW), the function of MGW be adopt various means with various users and service access in flexible exchanging network, MGW is at Media Gateway Controller (Media Gateway Controller, MGC) finish the conversion of data format and agreement under the control, all media information currents that insert all are converted to adopt the packet of IP agreement in flexible exchanging network, to transmit.
MGW can be divided into a plurality of Virtual Media Gateways, and (Virtual Media Gateway, VMGW), each VMGW is controlled by similar and different MGC.H.248, the concrete agreement TU-T that is defined between media gateway and the SoftSwitch has clear and definite definition in the agreement, and behind the division VMGW, different MGC can be absorbed in different business; Same MGC can think that also certain VMGW is absorbed in certain business, so the division of Virtual Media Gateway helps to simplify the design of MGC.
Referring to Fig. 1, it is the method flow diagram that prior art is selected bearer path, Fig. 2 is the structural representation that media gateway controller for controlling media gateway is selected bearer path in the prior art, selects the process of bearer path now in conjunction with Fig. 1 and Fig. 2 in the explanation prior art:
At first, at step S100, for Endpoint ID of each bar bearer path mark (TerminationIdentification, Tid), { y=11,12......} have identified corresponding bearer path between MGC and MGW as the Tid among Fig. 2 (y);
Then, at step S101, MGC is by specifying concrete Tid (y) indication MGW specifically to PSTN or integrated services digital network (Integrated Services Digital Network, ISDN) which bar bearer path of side carries out media stream transition, in Fig. 2, Media Gateway Controller is that media gateway is specified Tid (11), and then selected marker is the bearer path of Tid (11);
At step S102, media gateway connects corresponding bearer path;
At step S103, finish the conversion of data format and agreement by MGW, all media information currents that insert all are converted to adopt the packet of IP agreement in flexible exchanging network, to transmit;
At last, at step S104, media stream transition finishes, the releasing bearing passage.
But the method for the selection bearer path of prior art has following shortcoming:
At first and since Media Gateway Controller be the media gateway appointment be a concrete carrying end sign, so media gateway can only be carried out media stream transition with this bearer path,, will cause the media stream transition failure if when this bearer path is occupied;
Secondly, there is technology can not realize that bearer path is shared between different VMGW now.For instance, the MGW of a physics is divided into two VMGW1 and VMGW2, is subjected to the control of MGC1 and MGC2 respectively, and a bearer path end points or belong to VMGW1 is controlled by MGC1, or belonged to VMGW2 so, controlled by MGC2; But can not belong to VMGW1 and VMGW2 simultaneously, otherwise when MGC1 and MGC2 attempt to control same bearer path end points simultaneously, will produce conflict, thereby cause media stream transition to be obstructed.
Summary of the invention
Technical problem to be solved by this invention is, a kind of media gateway and the corresponding method of selecting bearer path are provided, make a bearer path end points share between different VMGW or MGC, different VMGW or MGC can use this bearer path end points.
In order to solve the problems of the technologies described above, the present invention proposes a kind of method of selecting bearer path, described method comprises:
(a) Media Gateway Controller sends the control signal carry set identification to media gateway, includes a plurality of and bearer path Endpoint ID one to one in the set of described each set identification institute mark;
(b) media gateway is searched the pairing set of this set identification according to the set identification that is received from Media Gateway Controller, selects the idle bearer path of Endpoint ID correspondence in this set.
Wherein, select the idle bearer path of the Endpoint ID correspondence in this set to be specially in the step (b):
(b11) search this Endpoint ID of gathering pairing available bearer path tabulation;
(b12) in the Endpoint ID tabulation of this available bearer path, select an Endpoint ID;
(b13) media gateway is selected corresponding idle bearer path according to selected Endpoint ID.
Finish in media stream transition, media gateway discharges after the bearer path that is connected, and the Endpoint ID of this bearer path is write down again in the Endpoint ID tabulation of pairing available bearer path into.
Selectively, select the idle bearer path of the Endpoint ID correspondence in this set to be specially in the step (b):
(b21) search the Endpoint ID of the pairing available bearer path by the upstate word mark of this set;
(b22) select an Endpoint ID that is marked with the upstate word;
(b23) media gateway is selected corresponding idle bearer path according to selected Endpoint ID.
Finish in media stream transition, media gateway discharges after the bearer path that is connected, and the Endpoint ID of this bearer path is used the upstate word mark again.
Correspondingly, the present invention proposes a kind of media gateway, this media gateway comprises:
Signal receiving unit: the control signal that carries the set identification of selecting bearer path that the receiving media gateway controller sends;
Memory cell: be used to store at least one set by the set identification mark; This set is made up of a plurality of Endpoint IDs;
Signal processing unit:, in memory cell, search the set corresponding, and select the Endpoint ID in the described set with it according to the set identification that signal receiving unit receives;
Passage linkage unit:, connect corresponding idle bearer path according to described Endpoint ID.
Wherein, the set in the memory cell also comprises the Endpoint ID tabulation of available bearer path, is used to write down the Endpoint ID of all available bearer path.
Selectively, the Endpoint ID of the available bearer path of each bar in the set in the memory cell carries out mark with the upstate word.
Wherein, an Endpoint ID can only belong to a set by the set identification mark.
Implement after the present invention program, when media gateway controller for controlling media gateway is selected bearer path, no longer specify concrete bearer path Endpoint ID, but specify an end points set, make a bearer path end points share between different VMGW or MGC, different VMGW or MGC can use this bearer path end points, carry out thereby make Media Stream change smoothly between heterogeneous networks, and can improve the utilance of resource, reduced the workload of configuring maintenance.
Description of drawings
Fig. 1 is the method flow diagram that prior art is selected bearer path;
Fig. 2 is the structural representation that media gateway controller for controlling media gateway is selected bearer path in the prior art;
Fig. 3 is the structural representation of media gateway among the present invention;
Fig. 4 is the structural representation of memory cell first embodiment in the media gateway of the present invention;
Fig. 5 is the structural representation of memory cell second embodiment in the media gateway of the present invention;
Fig. 6 is the schematic flow sheet that the present invention selects first embodiment of bearer path method;
Fig. 7 is the schematic flow sheet that the present invention selects second embodiment of bearer path method;
Fig. 8 is the structural representation that media gateway controller for controlling media gateway is selected bearer path among the present invention.
Embodiment
The method of selection bearer path of the present invention and media gateway, be applicable to that media gateway controller for controlling media gateway selection bearer path carries out the conversion of Media Stream, and can be, thereby make the media stream transition between two networks carry out smoothly and effectively so that each Virtual Media Gateway of being divided by media gateway is shared the Endpoint ID of bearer path.
As shown in Figure 3, media gateway 3 of the present invention specifically comprises:
Signal receiving unit 30: the control signal that carries the set identification of selecting bearer path that the receiving media gateway controller sends;
Memory cell 31: be used to store at least one set by the set identification mark; This set is made up of a plurality of Endpoint IDs;
Signal processing unit 32:, in memory cell, search the set corresponding, and select the Endpoint ID in the described set with it according to the Endpoint ID that signal receiving unit receives;
Passage linkage unit 33:, connect corresponding idle bearer path according to described Endpoint ID.
Referring to Fig. 4, be the structural representation of first embodiment of memory cell in the media gateway of the present invention:
In such an embodiment, store the set of a plurality of Endpoint IDs with the set identification mark in the memory cell 31.As set 310 by Tid (x0) mark, the set 311 of Tid (x1) mark, the set 312 of Tid (x2) mark, set 31n of Tid (xn) mark or the like;
Wherein, in each set, also dispose the Endpoint ID tabulation of available bearer path.As configuration available endpoint identification list 3100 in set 310, wherein include available Endpoint ID Tid (y ' 1) and Tid (y ' 2) or the like, gather and just also include in 310 at Endpoint ID Tid (y ' 3) of occupied bearer path or the like; Configuration available endpoint identification list 3101 wherein includes available Endpoint ID Tid (y ' 4) and Tid (y ' 5) or the like in set 311, gathers just also to include in 311 at Endpoint ID Tid (y ' 6) of occupied bearer path or the like;
Referring to Fig. 5, be the structural representation of second embodiment of memory cell in the media gateway of the present invention;
In such an embodiment, store the set of a plurality of Endpoint IDs with the set identification mark in the memory cell 31.As set 310 by Tid (x0) mark, the set 311 of Tid (x1) mark, the set 312 of Tid (x2) mark, set 31n of Tid (xn) mark or the like;
Different with memory cell shown in Figure 4 is that the Endpoint ID of available bearer path comes mark by the upstate word in the set that this memory cell is stored.As the sign of the available endpoint in the set 310 among Fig. 5 3110, with mark " 0 " mark Endpoint ID Tid (y ' 1), with mark one token Endpoint ID Tid (y ' 3).Represent that it is just occupied.
It is pointed out that an Endpoint ID can only belong to a set with the set identification mark, only belong to set 311 as Endpoint ID Tid (y ' 4);
Unlike the prior art be that the collocation method of Endpoint ID of the present invention is different from the collocation method of prior art, and two kinds of different modes are arranged here:
First kind of mode: set identification is embedded in the Endpoint ID, for example, in original Tid (y4), embed the sign x1 of set, formed the Endpoint ID Tid among the present invention (y ' 4), in original Tid (y5), embed set x1, formed the Endpoint ID Tid among the present invention (y ' 5), Tid (y ' 4) and Tid (y ' 5) just belong to a set 311 with Tid (x1) mark like this;
The second way: Endpoint ID is carried out wildcard, for example Tid (y ' 4) and Tid (y ' 5) are made into " frame/slot/port/
* * *" form, wherein, forward part " frame/slot/port/ " is represented the total sign of this set, and rear section " * * * * " for to be used for distinguishing different Endpoint IDs, " * " can be any character.Tid (y ' 4) and Tid (y ' 5) belong to a set 311 with Tid (x1) mark like this.
As shown in Figure 8, select the structural representation of bearer path for media gateway controller for controlling media gateway among the present invention.
Select bearer path when wherein, Media Gateway Controller 2 control media gateway 3 are carried out media stream transition between IP network 1 and public switched telephone network (PSTN) or integrated services digital network 4.
Referring to Fig. 6, the schematic flow sheet for the present invention selects first embodiment of bearer path method illustrates its implementation procedure in conjunction with Fig. 8, Fig. 3 and Fig. 4:
At first at step S600, Media Gateway Controller 2 transmits control signal to media gateway 3; Carry set identification Tid (x0) in this control signal;
At step S601, the set identification Tid (x0) that the signal receiving unit 30 of media gateway 3 receives from Media Gateway Controller 2;
At step S602, the signal processing unit 32 of media gateway 3 is searched the corresponding set 310 of set identification Tid (x0) in the memory cell 31;
At step S603, the signal processing unit 32 of media gateway 3 is searched the Endpoint ID tabulation 3100 of the available bearer path of set 310 correspondences in the memory cell 31;
At step S604, the signal processing unit 32 of media gateway 3 is selected an Endpoint ID Tid (y ' 1) from available endpoint identification list 3100;
At step S605, the passage linkage unit 33 in the media gateway 3 is selected corresponding bearer path according to Endpoint ID Tid (y ' 1);
At step S606, finish in media stream transition, passage linkage unit 33 releasing bearing passages are set up new registration procedure into available endpoint identification list 3100 with Endpoint ID.
Referring to Fig. 7, the schematic flow sheet for the present invention selects second embodiment of bearer path method illustrates its implementation procedure in conjunction with Fig. 8, Fig. 3 and Fig. 5:
At first at step S700, Media Gateway Controller 2 transmits control signal to media gateway 3; Carry set identification Tid (x0) in this control signal;
At step S701, the set identification Tid (x0) that the signal receiving unit 30 of media gateway 3 receives from Media Gateway Controller 2;
At step S702, the signal processing unit 32 of media gateway 3 is searched the corresponding set 310 of set identification Tid (x0) in the memory cell 31;
At step S703, the signal processing unit 32 of media gateway 3 is searched in the memory cell 31 Endpoint ID with the available bearer path of upstate word " 0 " mark of set 310 correspondences;
At step S704, the signal processing unit 32 of media gateway 3 is selected an Endpoint ID Tid (y ' 1) from the Endpoint ID of using upstate word " 0 " mark;
At step S705, the passage linkage unit 33 in the media gateway 3 is selected corresponding bearer path according to Endpoint ID Tid (y ' 1);
At step S706, finish in media stream transition, passage linkage unit 33 releasing bearing passages are used upstate word " 0 " mark again with Endpoint ID.
Need to prove that upstate word " 0 " and seizure condition word " 1 " are a kind of representation, all the expression modes that can distinguish available and occupied state all should be included in this situation the inside.
Implement the method for media gateway of the present invention and selection bearer path, make media gateway controller for controlling media gateway select the simplified control of bearer path and flexibly, the bearer path end points can be shared between each virtual gateway and Media Gateway Controller, for example, suppose that MGC1 and MGC2 share all end points among the end points set x1 of a bearer path, compare a part of x11 that MGC1 uses set x1, MGC2 uses another part x12 of set x, just can not occur gathering and also have available endpoint among the x11, but MGC1 is with the part of deciding oneself, can not use the x12 of MGC2 partly to cause the media stream transition bearer path to set up the situation of failure again, unless all end points all use among the x1.If the quantity of x11 and x12 does not need to reconfigure because the change of service traffics changes yet.
Above disclosed is a kind of preferred embodiment of the present invention only, can not limit the present invention's interest field certainly with this, and therefore the equivalent variations of doing according to claim of the present invention still belongs to the scope that the present invention is contained.
Claims (9)
1, a kind of method of selecting bearer path is characterized in that, described method comprises:
(a) Media Gateway Controller sends the control signal carry set identification to media gateway, includes a plurality of and bearer path Endpoint ID one to one in the set of described each set identification institute mark:
(b) media gateway is searched the pairing set of this set identification according to the set identification that is received from Media Gateway Controller, selects the idle bearer path of Endpoint ID correspondence in this set.
2, the method for selection bearer path as claimed in claim 1 is characterized in that, selects the idle bearer path of the Endpoint ID correspondence in this set to be specially in the step (b):
(b11) search this Endpoint ID of gathering pairing available bearer path tabulation;
(b12) in the Endpoint ID tabulation of this available bearer path, select an Endpoint ID;
(b13) media gateway is selected corresponding idle bearer path according to selected Endpoint ID.
3, the method for selection bearer path as claimed in claim 1 is characterized in that, selects the idle bearer path of the Endpoint ID correspondence in this set to be specially in the step (b):
(b21) search the Endpoint ID of the pairing available bearer path by the upstate word mark of this set;
(b22) select an Endpoint ID that is marked with the upstate word;
(b23) media gateway is selected corresponding idle bearer path according to selected Endpoint ID.
4, the method for selection bearer path as claimed in claim 2 is characterized in that, after the media gateway releasing bearing passage, the Endpoint ID of this bearer path is write down again in the Endpoint ID tabulation of into corresponding available bearer path.
5, the method for selection bearer path as claimed in claim 3 is characterized in that, after the media gateway releasing bearing passage, the Endpoint ID of this bearer path is carried out mark with the upstate word again.
6, a kind of media gateway is characterized in that, comprising:
Signal receiving unit: the control signal that carries the set identification of selecting bearer path that the receiving media gateway controller sends;
Memory cell: be used to store at least one set by the set identification mark; This set is made up of a plurality of Endpoint IDs;
Signal processing unit:, in memory cell, search the set corresponding, and select the Endpoint ID in the described set with it according to the set identification that signal receiving unit receives;
Passage linkage unit:, select corresponding idle bearer path according to described Endpoint ID.
7, media gateway as claimed in claim 6 is characterized in that, the set in the described memory cell also comprises the Endpoint ID tabulation of available bearer path, is used to write down the Endpoint ID of all available bearer path.
8, media gateway as claimed in claim 6 is characterized in that, the Endpoint ID of the available bearer path of each bar in the set in the described memory cell carries out mark with the upstate word.
As each described media gateway in the claim 6 to 8, it is characterized in that 9, a described Endpoint ID can only belong to a set by the set identification mark.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100371577A CN1937577B (en) | 2006-08-23 | 2006-08-23 | Method for selecting bearer channel and media gateway |
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|---|---|---|---|
| CN2006100371577A CN1937577B (en) | 2006-08-23 | 2006-08-23 | Method for selecting bearer channel and media gateway |
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| CN1937577A true CN1937577A (en) | 2007-03-28 |
| CN1937577B CN1937577B (en) | 2010-10-20 |
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| CN2006100371577A Expired - Fee Related CN1937577B (en) | 2006-08-23 | 2006-08-23 | Method for selecting bearer channel and media gateway |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008151559A1 (en) * | 2007-06-11 | 2008-12-18 | Huawei Technologies Co., Ltd. | A method, apparatus and system for selection of virtual media gateway |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100469064C (en) * | 2003-02-03 | 2009-03-11 | 艾利森电话股份有限公司 | Shared risk group handling within a media gateway |
| CN100387031C (en) * | 2003-06-03 | 2008-05-07 | 华为技术有限公司 | Method for inter-communication between virtual media gates |
| CN100440765C (en) * | 2003-07-10 | 2008-12-03 | 华为技术有限公司 | A method for implementing channel establishment by call between packet networks |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008151559A1 (en) * | 2007-06-11 | 2008-12-18 | Huawei Technologies Co., Ltd. | A method, apparatus and system for selection of virtual media gateway |
| CN101325564B (en) * | 2007-06-11 | 2010-10-20 | 华为技术有限公司 | Method, apparatus and system for selecting virtual medium gateway |
| US8165126B2 (en) | 2007-06-11 | 2012-04-24 | Huawei Technologies Co., Ltd. | Method, apparatus and system for selecting VMG |
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| CN1937577B (en) | 2010-10-20 |
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